CN114931802A

CN114931802A - Coprecipitation reaction system and outlet system thereof

Info

Publication number: CN114931802A
Application number: CN202210610615.0A
Authority: CN
Inventors: 何志; 赵聪; 康彬; 何劲松; 杨光耀
Original assignee: Sichuan Sidaneng Environmental Protection Technology Co ltd; Chengdu Stareng Environmental Protection Equipment Co ltd
Current assignee: Sichuan Sidaneng Environmental Protection Technology Co ltd; Chengdu Stareng Environmental Protection Equipment Co ltd
Priority date: 2022-05-31
Filing date: 2022-05-31
Publication date: 2022-08-23

Abstract

The invention discloses a coprecipitation reaction system and a cleaning system thereof, which adopt an integral movable cleaning module and can greatly facilitate the field installation of the cleaning system. The clear system that goes out of coprecipitation reaction system has all adopted a whole movable clear module that goes out, whole movable clear module specifically contains: the device comprises a frame type support, a clear liquid conveying and filter element backwashing pipeline system, a functional container equipment set and a pump set, wherein the frame type support comprises a support base and a bridge frame arranged on the support base, a pipeline facility installation area is formed on one side of the bridge frame on the support base, a pump equipment installation area is formed on the other side of the bridge frame, a pump equipment maintenance operation area is reserved between the pump equipment installation area and the bridge frame, and a functional container facility installation area is formed in the bridge frame.

Description

Coprecipitation reaction system and outlet system thereof

Technical Field

The embodiment of the application relates to a coprecipitation reaction system and a cleaning system thereof. The coprecipitation reaction system is suitable for preparing a precursor of a secondary battery anode material, and is particularly suitable for preparing a ternary precursor of a lithium ion battery anode material.

Background

The chemical coprecipitation method is widely applied to liquid-phase chemical synthesis of powder materials, and generally, a proper precipitator is added into a raw material solution, so that all components which are uniformly mixed in the solution are precipitated together according to a stoichiometric ratio, or an intermediate product is precipitated in the solution through reaction, and then is calcined and decomposed to prepare a target product. The process can regulate and control the granularity and the morphology of the product according to experimental conditions, and the effective components in the product can be uniformly mixed at the atomic and molecular level.

At present, the preparation of the ternary precursor of the lithium ion secondary battery anode material is an important application of a chemical coprecipitation method in new energy industry. In the preparation process, nickel sulfate (or nickel chloride), cobalt sulfate (or cobalt chloride) and manganese sulfate (or manganese chloride) are prepared into a mixed salt solution with a certain molar concentration, sodium hydroxide is prepared into an alkali solution with a certain molar concentration, ammonia water with a certain concentration is used as a complexing agent, the mixed salt solution, the alkali solution and the complexing agent are added into a reaction kettle at a certain flow rate, the stirring speed of the reaction kettle, the temperature and the pH value of reaction slurry, the reaction atmosphere (currently, the reaction process is generally required to be completed under the protection of nitrogen) and the like are controlled, so that salt and alkali are subjected to neutralization reaction to generate a ternary precursor crystal nucleus and grow gradually, and after the granularity reaches a preset value, a reaction product is filtered, washed and dried to obtain a ternary precursor. Therefore, the reaction process has more technological parameters to be controlled, and mainly comprises the following steps: salt and intermediate concentration, ammonia water concentration, the rate of adding the salt solution and the alkali solution into the reaction kettle, reaction temperature, pH value during the reaction process, stirring rate, reaction time, solid content of reaction slurry, reaction atmosphere and the like. And after the preparation of the ternary precursor is finished, uniformly mixing the ternary precursor and a lithium source according to a certain proportion, then calcining, and crushing, grading and drying the cooled material to obtain the lithium ion secondary battery anode material.

For the convenience of production, a filtration concentrator is also arranged beside the reaction kettle at present to implement the concentration outside the kettle. In the operation process of the reaction kettle, reaction raw materials (salt solution, alkali solution and ammonia water) are added into the reaction kettle, part of reaction slurry in the reaction kettle enters a filtering concentrator, a filter element is installed in the filtering concentrator and is provided with a stirring structure, clear liquid can be output from the filtering concentrator after the reaction slurry is filtered by the filter element, the clear liquid can be reused for reaction as mother liquid, and concentrated liquid in the filtering concentrator returns to the reaction kettle through a concentrated slurry backflow structure. The stirring structure in the filtration concentrator is generally including being arranged in the main shaft in the filtration concentrator and installing the epaxial stirring rake in the stirring, and the main shaft is driven by the outside motor of filtration concentrator, and filter core interval arrangement can stir thick liquids when the stirring rake is rotatory, prevents that the particulate matter in the thick liquids from subsiding and prolong filter cake formation time on the filter core. However, the internal structure design of the filtering concentrator leads to larger volume of the filtering concentrator, so that the reaction slurry stays in the filtering concentrator outside the reaction kettle for a longer time, the reaction process is influenced by various process parameters, and once the environment changes, the reaction is influenced, so that the consistency of the reaction and the granularity of the ternary precursor is influenced when the slurry stays in the filtering concentrator for a longer time.

Aiming at the problems brought by the independent arrangement of the filtering concentrator, one solution is to cancel the filtering concentrator and directly install the filter element in a reaction kettle, and at this time, the reaction kettle can be called as co-precipitation reaction and filtering concentration integrated equipment. Because the reaction and the filtration concentration are carried out in the coprecipitation reaction and filtration concentration integrated equipment, the reaction slurry is always in the same environment, and the influence of the independent deployment of the filtration concentrator on the reaction is avoided. However, it is noted that: the coprecipitation reaction and filtration concentration integrated equipment has higher requirement on the material damage prevention stability of the filter element. If the filter element is damaged, the reaction slurry is contaminated by the material falling off from the filter element.

On the other hand, no matter a coprecipitation reaction system with a separately deployed filter concentrator or a coprecipitation reaction system with a coprecipitation reaction and filter concentration integrated device is adopted, clear liquid filtered by the filter element needs to be output through a clear liquid outlet system. At present, a cleaning system mainly comprises a plurality of parts such as pipelines, valves, backflushing devices and the like, the parts are temporarily installed on site along with the field installation of a filter concentrator or a coprecipitation reaction and filter concentration integrated device, the construction strength is high, the time is long, and the project construction progress is influenced.

Disclosure of Invention

The embodiment of the application provides a plurality of coprecipitation reaction systems and a cleaning system thereof, and a whole movable cleaning module is adopted, so that the on-site installation of the cleaning system can be greatly facilitated.

In a first aspect, a coprecipitation reaction system and a purge system thereof are provided. The coprecipitation reaction system is a first coprecipitation reaction system or a second coprecipitation reaction system; when the coprecipitation reaction system is a first coprecipitation reaction system, the first coprecipitation reaction system employs a coprecipitation reaction unit and a filtering concentration unit that are independent of each other, and in the first coprecipitation reaction system: the coprecipitation reaction unit comprises a reaction kettle, the reaction kettle is provided with a shell and an inner cavity, a raw material feeding structure, a slurry discharging structure to be concentrated and a concentrated slurry backflow structure are respectively arranged on the shell of the reaction kettle, the raw material feeding structure, the slurry discharging structure to be concentrated and the concentrated slurry backflow structure are respectively communicated with the inner cavity of the reaction kettle, and a stirring structure is arranged in the inner cavity of the reaction kettle; the filtration and concentration unit comprises a filtration concentrator, the filtration concentrator is provided with a shell and a filter element, the filter element forms a stock solution cavity and a clear solution cavity in the shell of the filtration concentrator, a slurry feeding structure to be concentrated, a concentrated slurry discharging structure and a clear solution discharging structure are respectively arranged on the shell of the filtration concentrator, the slurry feeding structure to be concentrated and the concentrated reaction slurry discharging structure are respectively communicated with the stock solution cavity, and the clear solution discharging structure is communicated with the clear solution cavity; the slurry discharging structure to be concentrated is used for being connected with the slurry feeding structure to be concentrated through a pipeline, the concentrated slurry discharging structure is used for being connected with the concentrated slurry backflow structure through a pipeline, the raw material feeding structure is used for being connected with co-precipitation reaction raw material supply equipment, and the clear liquid discharging structure is used for being connected with a clear liquid discharging system; when the coprecipitation reaction system adopts a second coprecipitation reaction system, the second coprecipitation reaction system adopts a coprecipitation reaction and filtration concentration integrated device, and in the second coprecipitation reaction system: the coprecipitation reaction and filtering concentration integrated equipment comprises a reaction kettle and a filter element which are assembled together, the reaction kettle is provided with a shell and an inner cavity, a raw material feeding structure, a concentrated slurry discharging structure and a clear liquid discharging structure are respectively arranged on the shell of the reaction kettle, a stirring structure is arranged in the inner cavity of the reaction kettle, and the filter element is arranged in the shell of the filtering concentrator to form a raw liquid cavity and a clear liquid cavity; the inner cavity of the reaction kettle is communicated with the stock solution cavity, the raw material feeding structure and the concentrated slurry discharging structure are respectively communicated with the inner cavity of the reaction kettle, the raw material feeding structure is used for being connected with codeposition reaction raw material supply equipment, the clear solution discharging structure is communicated with the clear solution cavity, and the clear solution discharging structure is used for being connected with a clear solution discharging system; no matter the coprecipitation reaction system is a first coprecipitation reaction system or a second coprecipitation reaction system, the corresponding effluent system adopts an overall movable effluent module, and the overall movable effluent module specifically comprises: the frame type support comprises a support base and a bridge frame arranged on the support base, wherein a pipeline facility installation area is formed on one side, located on the bridge frame, of the support base, and a functional container facility installation area is formed in the bridge frame; a clear liquid conveying and filter element backwashing pipeline system which is arranged in the pipeline facility installation area, the clear liquid conveying and filter element backwashing pipeline system comprises clear liquid conveying pipes which correspond to the groups of the filter elements one by one and backwashing medium conveying pipes which correspond to the groups of the filter elements one by one, the output end of the clear liquid conveying pipe is connected with the clear liquid conveying main pipe through a control valve which is arranged one to one, the input end of the clear liquid conveying pipe is provided with a pipeline sight glass which is connected with a clear liquid input interface used for being connected with a clear liquid discharging structure of the corresponding filter element group, the input end of the backflushing medium conveying pipe is connected with a backflushing medium conveying main pipe through one-to-one control valve, the output ends of the back flushing medium conveying pipes are connected with the bypasses of the clear liquid conveying pipes which correspond to one another one by one; the functional container equipment set is erected on the bridge and located in the functional container type facility installation area, the functional container equipment set comprises a backflushing device, a backflushing medium input structure and a backflushing medium output structure are respectively arranged on a shell of the backflushing device, and the backflushing medium output structure is connected with the backflushing medium conveying main pipe. The purge system of the first aspect is a purge system in the above-described coprecipitation reaction system.

In a second aspect, a coprecipitation reaction system and a purge system thereof are provided. The coprecipitation reaction system is a first coprecipitation reaction system or a second coprecipitation reaction system; when the coprecipitation reaction system is a first coprecipitation reaction system, the first coprecipitation reaction system employs a coprecipitation reaction unit and a filtering concentration unit that are independent of each other, and in the first coprecipitation reaction system: the coprecipitation reaction unit comprises a reaction kettle, the reaction kettle is provided with a shell and an inner cavity, a raw material feeding structure, a slurry discharging structure to be concentrated and a concentrated slurry backflow structure are respectively arranged on the shell of the reaction kettle, the raw material feeding structure, the slurry discharging structure to be concentrated and the concentrated slurry backflow structure are respectively communicated with the inner cavity of the reaction kettle, and a stirring structure is arranged in the inner cavity of the reaction kettle; the filtration and concentration unit comprises a filtration concentrator, the filtration concentrator is provided with a shell and a filter element, the filter element forms a stock solution cavity and a clear solution cavity in the shell of the filtration concentrator, a slurry feeding structure to be concentrated, a concentrated slurry discharging structure and a clear solution discharging structure are respectively arranged on the shell of the filtration concentrator, the slurry feeding structure to be concentrated and the concentrated reaction slurry discharging structure are respectively communicated with the stock solution cavity, and the clear solution discharging structure is communicated with the clear solution cavity; the slurry discharging structure to be concentrated is used for being connected with the slurry feeding structure to be concentrated through a pipeline, the concentrated slurry discharging structure is used for being connected with the concentrated slurry backflow structure through a pipeline, the raw material feeding structure is used for being connected with co-precipitation reaction raw material supply equipment, and the clear liquid discharging structure is used for being connected with a clear liquid discharging system; when the coprecipitation reaction system adopts a second coprecipitation reaction system, the second coprecipitation reaction system adopts a coprecipitation reaction and filtration concentration integrated device, and in the second coprecipitation reaction system: the coprecipitation reaction and filtration concentration integrated equipment comprises a reaction kettle and a filter element which are assembled together, wherein the reaction kettle is provided with a shell and an inner cavity, a raw material feeding structure, a concentrated slurry discharging structure and a clear liquid discharging structure are respectively arranged on the shell of the reaction kettle, a stirring structure is arranged in the inner cavity of the reaction kettle, and the filter element is arranged in the shell of the filtration concentrator to form a raw liquid cavity and a clear liquid cavity; the inner cavity of the reaction kettle is communicated with the stock solution cavity, the raw material feeding structure and the concentrated slurry discharging structure are respectively communicated with the inner cavity of the reaction kettle, the raw material feeding structure is used for being connected with co-precipitation reaction raw material supply equipment, the clear solution discharging structure is communicated with the clear solution cavity, and the clear solution discharging structure is used for being connected with a clear solution discharging system; no matter the coprecipitation reaction system is a first coprecipitation reaction system or a second coprecipitation reaction system, the corresponding outlet system adopts an integral movable outlet module, and the integral movable outlet module specifically comprises: the frame-type support comprises a support base and a bridge frame arranged on the support base, wherein a pipeline facility installation area is formed on one side of the bridge frame on the support base, a pump equipment installation area is formed on the other side of the bridge frame, a pump equipment maintenance operation area is reserved between the pump equipment installation area and the bridge frame, and a functional container facility installation area is formed in the bridge frame; the system comprises a clear liquid conveying and filter element backwashing pipeline system, a pipeline facility installation area and a pipeline facility installation area, wherein the clear liquid conveying and filter element backwashing pipeline system is installed in the pipeline facility installation area and comprises clear liquid conveying pipes which correspond to the groups of the filter elements one to one and backwashing medium conveying pipes which correspond to the groups of the filter elements one to one, the output ends of the clear liquid conveying pipes are connected with a clear liquid conveying main pipe through one-to-one control valves, the input ends of the clear liquid conveying pipes are connected with clear liquid input interfaces which are used for being connected with clear liquid discharging structures of the groups of the corresponding filter elements, the input ends of the backwashing medium conveying pipes are connected with a backwashing medium conveying main pipe through one-to-one control valves, and the output ends of the backwashing medium conveying pipes are connected with bypasses of the clear liquid conveying pipes which correspond to one; the functional container equipment group is erected on the bridge and is positioned in the functional container facility installation area, the functional container equipment group comprises a backflushing device, a backflushing medium input structure and a backflushing medium output structure are respectively arranged on a shell of the backflushing device, and the backflushing medium output structure is connected with the backflushing medium conveying main pipe; the pump set is arranged in the pump equipment installation area and comprises a positive pump and a standby pump which are horizontally and transversely arranged at intervals, the positive pump and the standby pump are symmetrically arranged by taking a plumb surface which is arranged in the same direction as the horizontal longitudinal direction as a symmetrical surface, and the positive pump and the standby pump are mutually connected in parallel and are respectively selectively connected to the clear liquid conveying main pipe through valves to form a part of the clear liquid conveying main pipe. The purge system of the second aspect is the purge system in the above-described coprecipitation reaction system.

In a third aspect, a coprecipitation reaction system and a supernatant system thereof are provided. The coprecipitation reaction system is a first coprecipitation reaction system or a second coprecipitation reaction system; when the coprecipitation reaction system is a first coprecipitation reaction system, the first coprecipitation reaction system adopts a coprecipitation reaction unit and a filtering concentration unit which are independent of each other, and in the first coprecipitation reaction system: the coprecipitation reaction unit comprises a reaction kettle, the reaction kettle is provided with a shell and an inner cavity, a raw material feeding structure, a slurry discharging structure to be concentrated and a concentrated slurry backflow structure are respectively arranged on the shell of the reaction kettle, the raw material feeding structure, the slurry discharging structure to be concentrated and the concentrated slurry backflow structure are respectively communicated with the inner cavity of the reaction kettle, and a stirring structure is arranged in the inner cavity of the reaction kettle; the filtration and concentration unit comprises a filtration concentrator, the filtration concentrator is provided with a shell and a filter element, the filter element forms a stock solution cavity and a clear solution cavity in the shell of the filtration concentrator, a slurry feeding structure to be concentrated, a concentrated slurry discharging structure and a clear solution discharging structure are respectively arranged on the shell of the filtration concentrator, the slurry feeding structure to be concentrated and the concentrated reaction slurry discharging structure are respectively communicated with the stock solution cavity, and the clear solution discharging structure is communicated with the clear solution cavity; the slurry discharging structure to be concentrated is used for being connected with the slurry feeding structure to be concentrated through a pipeline, the concentrated slurry discharging structure is used for being connected with the concentrated slurry backflow structure through a pipeline, the raw material feeding structure is used for being connected with co-precipitation reaction raw material supply equipment, and the clear liquid discharging structure is used for being connected with a clear liquid discharging system; when the coprecipitation reaction system adopts a second coprecipitation reaction system, the second coprecipitation reaction system adopts a coprecipitation reaction and filtration concentration integrated device, and in the second coprecipitation reaction system: the coprecipitation reaction and filtration concentration integrated equipment comprises a reaction kettle and a filter element which are assembled together, wherein the reaction kettle is provided with a shell and an inner cavity, a raw material feeding structure, a concentrated slurry discharging structure and a clear liquid discharging structure are respectively arranged on the shell of the reaction kettle, a stirring structure is arranged in the inner cavity of the reaction kettle, and the filter element is arranged in the shell of the filtration concentrator to form a raw liquid cavity and a clear liquid cavity; the inner cavity of the reaction kettle is communicated with the stock solution cavity, the raw material feeding structure and the concentrated slurry discharging structure are respectively communicated with the inner cavity of the reaction kettle, the raw material feeding structure is used for being connected with codeposition reaction raw material supply equipment, the clear solution discharging structure is communicated with the clear solution cavity, and the clear solution discharging structure is used for being connected with a clear solution discharging system; no matter the coprecipitation reaction system is a first coprecipitation reaction system or a second coprecipitation reaction system, the corresponding effluent system adopts an overall movable effluent module, and the overall movable effluent module specifically comprises: the frame type support comprises a support base and a bridge frame arranged on the support base, wherein a pipeline facility installation area is formed on one side of the bridge frame on the support base, a pump equipment installation area is formed on the other side of the bridge frame on the support base, and a functional container facility installation area is formed on the bridge frame; the system comprises a clear liquid conveying and filter element backwashing pipeline system, a pipeline facility installation area and a pipeline facility installation area, wherein the clear liquid conveying and filter element backwashing pipeline system is installed in the pipeline facility installation area and comprises clear liquid conveying pipes which correspond to the groups of the filter elements one to one and backwashing medium conveying pipes which correspond to the groups of the filter elements one to one, the output ends of the clear liquid conveying pipes are connected with a clear liquid conveying main pipe through one-to-one control valves, the input ends of the clear liquid conveying pipes are connected with clear liquid input interfaces which are used for being connected with clear liquid discharging structures of the groups of the corresponding filter elements, the input ends of the backwashing medium conveying pipes are connected with a backwashing medium conveying main pipe through one-to-one control valves, and the output ends of the backwashing medium conveying pipes are connected with bypasses of the clear liquid conveying pipes which correspond to one; a functional container equipment group which is erected on the bridge and is positioned in the installation area of the functional container facilities, the functional container equipment set comprises a backflushing device and a heat exchange cooler, a shell of the backflushing device is respectively provided with a backflushing medium input structure and a backflushing medium output structure, the backflushing medium output structure is connected with the backflushing medium conveying main pipe, a clear liquid channel and a cooling medium channel which are separated from each other through a heat exchange wall are arranged in the heat exchange cooler, a clear liquid inlet and a clear liquid outlet which are respectively connected with the two ends of the clear liquid channel are arranged on the shell of the heat exchange cooler, the shell of the heat exchange cooler is also provided with a cooling medium inlet and a cooling medium outlet which are respectively connected with the two ends of the cooling medium channel, the supernatant inlet and the supernatant outlet are connected in series on the supernatant delivery manifold such that the supernatant channel forms part of the supernatant delivery manifold; and the pump is arranged in the pump equipment installation area, is connected into the clear liquid conveying main pipe to form a part of the clear liquid conveying main pipe, and is positioned at the downstream of the clear liquid conveying main pipe relative to the heat exchange cooler. The effluent system of the third aspect is the effluent system in the above-described coprecipitation reaction system.

In a fourth aspect, a coprecipitation reaction system and a purge system thereof are provided. The coprecipitation reaction system is a first coprecipitation reaction system or a second coprecipitation reaction system; when the coprecipitation reaction system is a first coprecipitation reaction system, the first coprecipitation reaction system employs a coprecipitation reaction unit and a filtering concentration unit that are independent of each other, and in the first coprecipitation reaction system: the coprecipitation reaction unit comprises a reaction kettle, the reaction kettle is provided with a shell and an inner cavity, a raw material feeding structure, a slurry discharging structure to be concentrated and a concentrated slurry backflow structure are respectively arranged on the shell of the reaction kettle, the raw material feeding structure, the slurry discharging structure to be concentrated and the concentrated slurry backflow structure are respectively communicated with the inner cavity of the reaction kettle, and a stirring structure is arranged in the inner cavity of the reaction kettle; the filtration and concentration unit comprises a filtration concentrator, the filtration concentrator is provided with a shell and a filter element, the filter element forms a stock solution cavity and a clear solution cavity in the shell of the filtration concentrator, a slurry feeding structure to be concentrated, a concentrated slurry discharging structure and a clear solution discharging structure are respectively arranged on the shell of the filtration concentrator, the slurry feeding structure to be concentrated and the concentrated reaction slurry discharging structure are respectively communicated with the stock solution cavity, and the clear solution discharging structure is communicated with the clear solution cavity; the slurry discharging structure to be concentrated is used for being connected with the slurry feeding structure to be concentrated through a pipeline, the concentrated slurry discharging structure is used for being connected with the concentrated slurry backflow structure through a pipeline, the raw material feeding structure is used for being connected with co-precipitation reaction raw material supply equipment, and the clear liquid discharging structure is used for being connected with a clear liquid discharging system; when the coprecipitation reaction system adopts a second coprecipitation reaction system, the second coprecipitation reaction system adopts a coprecipitation reaction and filtration concentration integrated device, and in the second coprecipitation reaction system: the coprecipitation reaction and filtering concentration integrated equipment comprises a reaction kettle and a filter element which are assembled together, the reaction kettle is provided with a shell and an inner cavity, a raw material feeding structure, a concentrated slurry discharging structure and a clear liquid discharging structure are respectively arranged on the shell of the reaction kettle, a stirring structure is arranged in the inner cavity of the reaction kettle, and the filter element is arranged in the shell of the filtering concentrator to form a raw liquid cavity and a clear liquid cavity; the inner cavity of the reaction kettle is communicated with the stock solution cavity, the raw material feeding structure and the concentrated slurry discharging structure are respectively communicated with the inner cavity of the reaction kettle, the raw material feeding structure is used for being connected with codeposition reaction raw material supply equipment, the clear solution discharging structure is communicated with the clear solution cavity, and the clear solution discharging structure is used for being connected with a clear solution discharging system; no matter the coprecipitation reaction system is a first coprecipitation reaction system or a second coprecipitation reaction system, the corresponding effluent system adopts an overall movable effluent module, and the overall movable effluent module specifically comprises: the frame type support comprises a support base and a bridge frame arranged on the support base, wherein a pipeline facility installation area is formed on one side, located on the bridge frame, of the support base, and a functional container facility installation area is formed on the bridge frame; the system comprises a clear liquid conveying and filter element backwashing pipeline system, a pipeline facility installation area and a pipeline facility installation area, wherein the clear liquid conveying and filter element backwashing pipeline system is installed in the pipeline facility installation area and comprises clear liquid conveying pipes which correspond to the groups of the filter elements one to one and backwashing medium conveying pipes which correspond to the groups of the filter elements one to one, the output ends of the clear liquid conveying pipes are connected with a clear liquid conveying main pipe through one-to-one control valves, the input ends of the clear liquid conveying pipes are connected with clear liquid input interfaces which are used for being connected with clear liquid discharging structures of the groups of the corresponding filter elements, the input ends of the backwashing medium conveying pipes are connected with a backwashing medium conveying main pipe through one-to-one control valves, and the output ends of the backwashing medium conveying pipes are connected with bypasses of the clear liquid conveying pipes which correspond to one; the functional container equipment group is erected on the bridge and is positioned in the functional container facility installation area, the functional container equipment group comprises a backflushing device, a backflushing medium input structure and a backflushing medium output structure are respectively arranged on a shell of the backflushing device, and the backflushing medium output structure is connected with the backflushing medium conveying main pipe; the device comprises a clear liquid conveying main pipe, a back flushing medium input structure, a back flushing overflow port, a back flushing overflow pipe and a back flushing medium input structure, wherein the back flushing medium input structure of the back flushing device comprises the back flushing liquid input structure and a compressed gas input structure, the back flushing overflow port is further arranged on a shell of the back flushing device and is connected to an output port of the clear liquid conveying main pipe through the back flushing overflow pipe, and then the output port of the clear liquid conveying main pipe is integrally higher than the back flushing overflow port and is provided with a rising section. The effluent system of the fourth aspect is the effluent system in the above-described coprecipitation reaction system.

In a fifth aspect, a coprecipitation reaction system and a supernatant system thereof are provided. The coprecipitation reaction system is a first coprecipitation reaction system or a second coprecipitation reaction system; when the coprecipitation reaction system is a first coprecipitation reaction system, the first coprecipitation reaction system employs a coprecipitation reaction unit and a filtering concentration unit that are independent of each other, and in the first coprecipitation reaction system: the coprecipitation reaction unit comprises a reaction kettle, the reaction kettle is provided with a shell and an inner cavity, a raw material feeding structure, a slurry discharging structure to be concentrated and a concentrated slurry backflow structure are respectively arranged on the shell of the reaction kettle, the raw material feeding structure, the slurry discharging structure to be concentrated and the concentrated slurry backflow structure are respectively communicated with the inner cavity of the reaction kettle, and a stirring structure is arranged in the inner cavity of the reaction kettle; the filtration and concentration unit comprises a filtration concentrator, the filtration concentrator is provided with a shell and a filter element, the filter element forms a stock solution cavity and a clear solution cavity in the shell of the filtration concentrator, a slurry feeding structure to be concentrated, a concentrated slurry discharging structure and a clear solution discharging structure are respectively arranged on the shell of the filtration concentrator, the slurry feeding structure to be concentrated and the concentrated reaction slurry discharging structure are respectively communicated with the stock solution cavity, and the clear solution discharging structure is communicated with the clear solution cavity; the slurry discharging structure to be concentrated is used for being connected with the slurry feeding structure to be concentrated through a pipeline, the concentrated slurry discharging structure is used for being connected with the concentrated slurry backflow structure through a pipeline, the raw material feeding structure is used for being connected with co-precipitation reaction raw material supply equipment, and the clear liquid discharging structure is used for being connected with a clear liquid discharging system; when the coprecipitation reaction system adopts a second coprecipitation reaction system, the second coprecipitation reaction system adopts a coprecipitation reaction and filtration concentration integrated device, and in the second coprecipitation reaction system: the coprecipitation reaction and filtering concentration integrated equipment comprises a reaction kettle and a filter element which are assembled together, the reaction kettle is provided with a shell and an inner cavity, a raw material feeding structure, a concentrated slurry discharging structure and a clear liquid discharging structure are respectively arranged on the shell of the reaction kettle, a stirring structure is arranged in the inner cavity of the reaction kettle, and the filter element is arranged in the shell of the filtering concentrator to form a raw liquid cavity and a clear liquid cavity; the inner cavity of the reaction kettle is communicated with the stock solution cavity, the raw material feeding structure and the concentrated slurry discharging structure are respectively communicated with the inner cavity of the reaction kettle, the raw material feeding structure is used for being connected with codeposition reaction raw material supply equipment, the clear solution discharging structure is communicated with the clear solution cavity, and the clear solution discharging structure is used for being connected with a clear solution discharging system; no matter the coprecipitation reaction system is a first coprecipitation reaction system or a second coprecipitation reaction system, the corresponding effluent system adopts an overall movable effluent module, and the overall movable effluent module specifically comprises: the frame type support comprises a support base and a bridge frame arranged on the support base, wherein a pipeline facility installation area is formed on one side, located on the bridge frame, of the support base, and a functional container facility installation area is formed on the bridge frame; the system comprises a clear liquid conveying and filter element backwashing pipeline system, a pipeline facility installation area and a pipeline facility installation area, wherein the clear liquid conveying and filter element backwashing pipeline system is installed in the pipeline facility installation area and comprises clear liquid conveying pipes which correspond to the groups of the filter elements one to one and backwashing medium conveying pipes which correspond to the groups of the filter elements one to one, the output ends of the clear liquid conveying pipes are connected with a clear liquid conveying main pipe through one-to-one control valves, the input ends of the clear liquid conveying pipes are connected with clear liquid input interfaces which are used for being connected with clear liquid discharging structures of the groups of the corresponding filter elements, the input ends of the backwashing medium conveying pipes are connected with a backwashing medium conveying main pipe through one-to-one control valves, and the output ends of the backwashing medium conveying pipes are connected with bypasses of the clear liquid conveying pipes which correspond to one; the functional container equipment set is erected on the bridge and located in the functional container type facility installation area, the functional container equipment set comprises a backflushing device and a vapor-liquid separator, a backflushing medium input structure and a backflushing medium output structure are arranged on a shell of the backflushing device respectively, a vapor-liquid mixed phase input structure, a separated liquid phase output structure and a separated gas phase output structure are arranged on a shell of the vapor-liquid separator respectively, and the backflushing medium output structure is connected with the backflushing medium conveying main pipe. The purge system of the fifth aspect is a purge system in the above-described coprecipitation reaction system.

The coprecipitation reaction system and the cleaning system thereof adopt the integral movable cleaning module, and the cleaning system can be greatly and conveniently installed on site.

The present application will be further described with reference to the following drawings and detailed description. Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to assist in understanding the present application and are included to explain, by way of illustration, embodiments of the present application and not to limit the embodiments of the present application.

Fig. 1 is a schematic diagram of a co-precipitation reaction system according to an embodiment of the present disclosure.

Fig. 2 is a schematic diagram of a filter concentrator assembly of the system of fig. 1.

Fig. 3 is a schematic internal view of the filter concentrator of the assembly of fig. 2.

FIG. 4 is a schematic cross-sectional view of a filter concentrator in a co-precipitation reaction system according to an embodiment of the present disclosure.

FIG. 5 is a schematic cross-sectional view of a filter concentrator in a co-precipitation reaction system according to an embodiment of the present disclosure.

FIG. 6 is a schematic cross-sectional view of a filter concentrator in a co-precipitation reaction system according to an embodiment of the present disclosure.

Fig. 7 is a three-dimensional structural diagram of a discharging system in a coprecipitation reaction system according to an embodiment of the present disclosure.

Fig. 8 is a three-dimensional block diagram of the system of fig. 7 at another angle.

Fig. 9 is a three-dimensional block diagram of the system of fig. 7 at another angle.

Fig. 10 is a three-dimensional block diagram of the system of fig. 7 at another angle.

Fig. 11 is a three-dimensional structure diagram of the system shown in fig. 10 after hiding the electrical box.

Fig. 12 is a main schematic view of the system shown in fig. 7.

Detailed Description

The present application will now be described more fully hereinafter with reference to the accompanying drawings. Those of ordinary skill in the art will be able to implement the present application based on these descriptions. Before describing the present application in conjunction with the drawings, it is noted that:

the technical solutions and features provided in the respective sections including the following description may be combined with each other without conflict. Furthermore, where possible, these aspects, features and combinations of features may be given the same technical subject matter as what is claimed in the related patent.

The embodiments of the application referred to in the following description are generally only some embodiments, rather than all embodiments, on the basis of which all other embodiments that can be derived by a person skilled in the art without inventive step should be considered within the scope of patent protection.

With respect to the terms and units in this specification: the terms "comprising," "including," "having," and any variations thereof in this specification and in the claims and following claims are intended to cover non-exclusive inclusions. In addition, the term "reactor" in the present description and in the corresponding claims and the relevant parts is not necessarily to be understood as a single reactor, but may also be understood as an integer comprising a main reactor and a secondary reactor, or an integer comprising a reactor and an aging reactor. Other related terms and units can be reasonably construed based on the description to provide related contents.

The applicant of the present application has developed two coprecipitation reaction systems for the preparation of ternary precursors of positive electrode materials for lithium ion secondary batteries before the present application is proposed. The following is a brief description of these two coprecipitation reaction systems in order to provide a full understanding of the present application. For convenience of description, the two coprecipitation reaction systems will be hereinafter referred to as a first coprecipitation reaction system and a second coprecipitation reaction system, respectively.

First coprecipitation reaction system

The first coprecipitation reaction system mainly comprises: a coprecipitation reaction unit and a filtration concentration unit. The filtration and concentration unit may also include a purge system as described below, if desired (depending primarily on the range of products actually sold by the applicant).

The coprecipitation reaction unit comprises a reaction kettle, the reaction kettle is provided with a shell and an inner cavity, the shell of the reaction kettle is respectively provided with a raw material feeding structure, a to-be-concentrated slurry discharging structure and a concentrated slurry backflow structure, the raw material feeding structure, the to-be-concentrated slurry discharging structure and the concentrated slurry backflow structure are respectively communicated with the inner cavity of the reaction kettle, and a stirring structure is arranged in the inner cavity of the reaction kettle.

The filtration concentration unit contains the filtration concentrator, the filtration concentrator has shell and filter core, the filter core is in form stoste chamber and clear solution chamber in the shell of filtration concentrator, be equipped with respectively on the shell of filtration concentrator and remain concentrated thick liquids feeding structure, concentrated thick liquids ejection of compact structure and clear solution ejection of compact structure, wait concentrated thick liquids feeding structure with concentrated thick liquids ejection of compact structure respectively with stoste chamber intercommunication, clear solution ejection of compact structure with clear solution chamber intercommunication.

In addition, a stirring structure is also arranged in the filtering concentrator. The stirring structure in the filtering concentrator comprises a main shaft positioned in the filtering concentrator and a stirring paddle arranged on the main shaft, and the main shaft is driven by a motor outside the filtering concentrator. Filter the filter core in the concentrator then interval arrangement in the stirring rake periphery, can stir thick liquids when the stirring rake is rotatory, prevent that the particulate matter in the thick liquids from subsiding and prolong filter cake formation time on the filter core simultaneously.

The slurry feeding structure is used for being connected with a co-precipitation clear liquid discharging system reaction raw material supply device, and the clear liquid discharging structure is used for being connected with a clear liquid discharging system.

Above-mentioned raw materials feeding structure, treat concentrated thick liquids ejection of compact structure, concentrated thick liquids backward flow knot, treat concentrated thick liquids feeding structure, concentrated thick liquids ejection of compact structure, clear liquid ejection of compact structure can contain the pipe connection who corresponds respectively, still is equipped with the valve on the pipe connection when needs.

In the preparation process of the ternary precursor of the lithium ion secondary battery anode material, nickel sulfate (or nickel chloride), cobalt sulfate (or cobalt chloride) and manganese sulfate (or manganese chloride) are prepared into a mixed salt solution with a certain molar concentration, sodium hydroxide is prepared into an alkali solution with a certain molar concentration, ammonia water with a certain concentration is used as a complexing agent, the mixed salt solution, the alkali solution and the complexing agent are added into a reaction kettle through a raw material feeding structure at a certain flow rate, the stirring rate of the reaction kettle, the temperature and the pH value of reaction slurry, a reaction atmosphere (currently, the reaction process is generally required to be completed under the protection of nitrogen) and the like, so that salt and alkali are subjected to neutralization reaction to generate a ternary precursor crystal nucleus and gradually grow up. In the reaction kettle operation process, the reaction raw materials are added into the reaction kettle, partial reaction slurry in the reaction kettle is pumped into the filtering concentrator, the filtering concentrator is internally provided with a filter element and is provided with a stirring structure, the reaction slurry is filtered through the filter element and then clear liquid can be output from the filtering concentrator, the clear liquid can be reused for reaction as mother liquid, and the concentrated liquid in the filtering concentrator returns to the reaction kettle through a concentrated slurry backflow structure. When filtering concentration, the stirring paddle in the filtering concentrator is rotated to stir the slurry, thereby preventing the particulate matters in the slurry from settling and prolonging the filter cake forming time on the filter element.

Drawbacks of the first co-precipitation reaction system include: firstly, the internal structure design of the filter concentrator leads to larger volume of the filter concentrator, so that the reaction slurry stays in the filter concentrator outside the reaction kettle for a longer time, the reaction process is influenced by various process parameters, and once the environment changes, the reaction is influenced, so that the consistency of the reaction and the granularity of the ternary precursor is influenced when the slurry stays in the filter concentrator for a longer time. Secondly, the filter element forming time on the surface of the filter element is shorter when high-concentration slurry is treated, and the filtering flux is reduced rapidly. Thirdly, the slurry cannot be dispersed for a long time after forming a filter cake, so that the particles are agglomerated, and the consistency of the product appearance is influenced. Fourth, the tank and the stirring structure of the filtration concentrator are bulky, resulting in high manufacturing and use costs. Fifthly, the motor power of the stirring structure is high, and the energy consumption is high.

Second coprecipitation reaction system

Aiming at the problems brought by the independent arrangement of the filtering concentrator in the first coprecipitation reaction system, the filtering concentrator is cancelled in the second coprecipitation reaction system, and a filter element of the filtering concentrator is directly arranged in the reaction kettle. In this case, the reaction kettle can be called as a coprecipitation reaction and filtration concentration integrated device.

Particularly, coprecipitation reaction and concentrated integration equipment that filters contain reation kettle and the filter core of equipment together, reation kettle has shell and inner chamber, be equipped with raw materials feeding structure, concentrated thick liquids ejection of compact structure and clear liquid ejection of compact structure on reation kettle's the shell respectively, be equipped with the stirring structure in reation kettle's the inner chamber, the filter core is installed form stoste chamber and clear liquid chamber in filtering concentrator's the shell.

The inner chamber of reation kettle with stoste chamber intercommunication, raw materials feeding structure and concentrated thick liquids ejection of compact structure respectively with reation kettle's inner chamber intercommunication, raw materials feeding structure is used for being connected with codeposition reaction raw materials supply apparatus, clear liquid ejection of compact structure with clear liquid chamber intercommunication, clear liquid ejection of compact structure is used for with play clear system connection.

Because the reaction and the filtration concentration are carried out in the coprecipitation reaction and filtration concentration integrated equipment, the reaction slurry is always in the same environment, and the influence of the independent deployment of the filtration concentrator on the reaction is avoided. However, it is noted that: the coprecipitation reaction and filtration concentration integrated equipment has higher requirement on the material damage prevention stability of the filter element. If the filter element is damaged, the reaction slurry is contaminated by the material falling off from the filter element.

In addition, the second coprecipitation reaction system cannot solve the problems that the filter element forming time on the surface of the filter element is short and the filter flux is reduced rapidly when the coprecipitation reaction and filtering concentration integrated equipment is used for treating high-concentration slurry; after the slurry forms a filter cake, the filter cake cannot be dispersed for a long time, so that the particles are agglomerated, and the consistency of the product appearance is influenced; the tank body and the stirring structure of the coprecipitation reaction and filtration concentration integrated equipment have larger volumes, so that the manufacturing and using cost is higher; the motor power of the stirring structure is large, and the energy consumption is high.

In addition, no matter the first coprecipitation reaction system or the second coprecipitation reaction system, clear liquid filtered by the filter element needs to be output through the clear liquid outlet system. At present, a cleaning system mainly comprises a plurality of parts such as pipelines, valves, backflushing devices and the like, the parts are temporarily installed on site along with the field installation of a filter concentrator or a coprecipitation reaction and filter concentration integrated device, the construction strength is high, the time is long, and the project construction progress is influenced.

The present application thus proposes the following embodiments, which will give a corresponding solution to at least one of the problems mentioned above.

Third coprecipitation reaction system

A coprecipitation reaction system comprises a coprecipitation reaction unit and a filtering concentration unit. The filtration and concentration unit may also include a purge system as described below, if desired (depending primarily on the range of products actually sold by the applicant).

The slurry discharging structure to be concentrated is used for being connected with the slurry feeding structure to be concentrated, the concentrated slurry discharging structure is used for being connected with the concentrated slurry backflow structure, the raw material feeding structure is used for being connected with co-precipitation reaction raw material supply equipment, and the clear liquid discharging structure is used for being connected with a clear liquid discharging system.

In the filtering concentrator, the filter element is provided with a first edge and a second edge which are perpendicular to each other, the area of a filtering surface of the filter element is basically determined by the product of the length of the first edge and the length of the second edge, the direction of the length of the first edge is consistent with the direction of a central axis of a shell of the filtering concentrator, and the slurry feeding structure to be concentrated and the concentrated slurry discharging structure are respectively arranged on the shell of the filtering concentrator at positions at two ends of the central axis and are respectively communicated with two ends of a stock solution cavity.

And, if a plane perpendicular to the central axis and intersecting the filtering surface of the filter element is taken as a cross section: on the cross section, the stock solution cavities are distributed in the form of a first graph, the first graph is a closed graph, the shape of the closed graph is circular, annular or polygonal, the area, except the first graph, of the cross section, which is positioned in the shell of the filtering concentrator, is basically composed of a second graph and a third graph, the clear solution cavities are distributed in the form of the second graph, the filtering materials of the filter element are distributed in the form of the third graph, and the corresponding central points of the central axis on the cross section are close to or positioned in the first graph, the second graph or the third graph.

In a first mode

Fig. 1 is a schematic diagram of a co-precipitation reaction system according to an embodiment of the present disclosure. Fig. 2 is a schematic diagram of a filter concentrator assembly of the system of fig. 1. Fig. 3 is a schematic internal view of the filter concentrator of the assembly of fig. 2. As shown in fig. 1 to 3, a coprecipitation reaction system includes a coprecipitation reaction unit (not shown) and a filtration concentration unit.

The coprecipitation reaction unit comprises a reaction kettle, the reaction kettle is provided with a shell and an inner cavity, the shell of the reaction kettle is respectively provided with a raw material feeding structure, a to-be-concentrated slurry discharging structure A and a concentrated slurry backflow structure B, the raw material feeding structure, the to-be-concentrated slurry discharging structure A and the concentrated slurry backflow structure B are respectively communicated with the inner cavity of the reaction kettle, and a stirring structure is arranged in the inner cavity of the reaction kettle.

The filtration concentration unit contains filtration concentrator 10, filtration concentrator 10 has shell 11 and filter core 12, filter core 12 is in form former liquid chamber 13 and clear liquid chamber 14 in the shell 11 of filtration concentrator, be equipped with respectively on the shell 11 of filtration concentrator 10 and treat concentrated thick liquids feeding structure 15, concentrated thick liquids ejection of compact structure 16 and clear liquid ejection of compact structure 17, treat concentrated thick liquids feeding structure 15 with concentrated thick liquids ejection of compact structure 16 respectively with former liquid chamber 13 intercommunication, clear liquid ejection of compact structure 17 with clear liquid chamber 14 intercommunication.

The slurry discharging structure a to be concentrated is used for being connected with the slurry feeding structure 15 to be concentrated, the concentrated slurry discharging structure 16 is used for being connected with the concentrated slurry backflow structure B, the raw material feeding structure is used for being connected with a co-precipitation reaction raw material supply device, and the clear liquid discharging structure 17 is used for being connected with the clear liquid discharging system 200.

Specifically, the filtration and concentration unit comprises N filtration and concentration assemblies 100, wherein N is an integer greater than or equal to 1, the filtration and concentration assemblies 100 are formed by connecting a plurality of filtration and concentration devices 10, and the filtration and concentration devices 10 are tubular filtration and concentration devices 10'.

The tubular filtration concentrator 10' has a tubular housing 11 and a filter element 12 having a shape and size adapted to the pipe in the housing 11, wherein an axial passage 12A is provided in the filter element 12, and the axial passage 12A constitutes the raw liquid chamber 13 or the clear liquid chamber 14.

When the axial channel 12A forms the raw liquid chamber 13, the clear liquid chamber 14 is formed between the pipe in the housing 11 and the filter element 12. When the axial channel 12A forms the clear liquid chamber 14, the raw liquid chamber 13 is formed between the pipe in the housing 11 and the filter element 12.

In addition, the slurry feeding structure 15 to be concentrated and the concentrated slurry discharging structure 16 of the tube filtration concentrator 10 'in the filtration concentrator assembly 100 are sequentially connected end to end, so that the stock solution cavities 13 of the tube filtration concentrators 10' are connected in series to form a flow path, the slurry feeding structure 15 to be concentrated in the flow path is connected with the slurry discharging structure a to be concentrated, and the concentrated slurry discharging structure 16 at the end is connected with the concentrated slurry returning structure B.

As shown in fig. 2-3, in one embodiment, the cartridge 12 is a tubular cartridge, and thus, the axial passage 12A is the inner conduit of the tubular cartridge, which forms the feed solution chamber 13. The wall of the shell 11 of the tubular filtering concentrator 10' is provided with the clear liquid discharging structure.

With respect to the tubular cartridge described above, it can be considered that the tubular cartridge has a first edge and a second edge perpendicular to each other, wherein the first edge can be considered as a generatrix of the cylindrical surface constituted by the inner conduit of the tubular cartridge (coinciding with the direction of the central axis of the shell 11 of the tubular filtration concentrator 10'), and the second edge can be considered as a circle formed by the bottom edge or the top edge of the cylindrical surface constituted by the inner conduit of the tubular cartridge. Here, the filter area of the tubular filter insert is equal to the product of the length of the first edge and the length of the second edge.

The coprecipitation reaction system of the embodiment cancels the original stirring structure through redesign of the structure of the filtering concentrator, can prevent the particles in the slurry from blocking the stock solution cavity by enabling the slurry to flow in the stock solution cavity of the filtering concentrator along the central axis direction of the shell of the filtering concentrator, and prolongs the filter cake forming time on the filter element. In addition, the tubular filtering concentrator 10' can remarkably reduce the diameter of the filtering concentrator, effectively reduce the retention time of the reaction slurry in the filtering concentrator outside the reaction kettle, greatly reduce the influence of the independent arrangement of the filtering concentrator on the reaction and ensure the consistency of the granularity of the ternary precursor.

Preferably, as shown in fig. 2, the tubular filtration concentrators 10 ' of the filtration concentrator assembly 100 are arranged in parallel and spaced apart arrangement, and the slurry feed structure 15 to be concentrated and the concentrated slurry discharge structure 16 between adjacent tubular filtration concentrators 10 ' are connected by a bend 101 such that the dope chamber 13 between adjacent tubular filtration concentrators 10 ' is connected in series. In this manner, the filter concentrator assembly 100 is made more compact, reducing the space occupied by the filter concentrator assembly 100.

In addition, the elbow 101 in the filter concentrator assembly 100 is preferably horizontally disposed. This is mainly because the slurry contains solid particles, which easily cause the solid particles to completely block the elbow 101 if the elbow 101 is vertically arranged; when the bend 101 is horizontally disposed, even if solid particles are precipitated in the bend 101, they are layered in the horizontally disposed bend 101 and flow out of a certain flow space in the upper portion of the bend 101.

When the elbow 101 in the filter concentrator assembly 100 is horizontally disposed, it is apparent that the filter concentrator assembly 100 is also horizontally disposed. Thus, when the filtration concentration unit comprises more than 2 filtration concentrator modules, the more than 2 filtration concentrator modules will be in an up-down arrangement.

Optionally, the clear liquid discharge structures 17 of different tube filter concentrators 10' in the same filter concentrator assembly 100 may be merged together and form a set of clear liquid discharge structures; the group of clear liquid discharging structures 17 corresponds to a group of filter elements 12, and the clear liquid discharging system 200 performs back flushing regeneration on the filter elements 12 in the same group according to the group of the filter elements 12.

Alternatively, the clear liquid discharge structures 17 of different tube filtration concentrators 10' in different filtration concentrator assemblies 100 converge together and form a set of clear liquid discharge structures; the group of clear liquid discharging structures 17 corresponds to a group of filter elements 12, and the clear liquid discharging system 200 performs back flushing regeneration on the filter elements 12 of the same group at the same time according to the group of the filter elements 12.

Specifically, as shown in FIG. 1, the clear liquid discharge structures 17 of different tube filter concentrators 10' in different filter concentrator assemblies 100 are brought together to form a set of clear liquid discharge structures. Moreover, if the different candle filter concentrators 10 ' in the filter concentrator assembly 100 are numbered in sequence, a set of clear liquid discharge structure connections are connected to the same numbered candle filter concentrator 10 ' in the different candle filter concentrator assemblies 100, which facilitates subsequent control of the pressure differential between the raw liquid chamber 13 and the clear liquid chamber 14 in each candle filter concentrator 10 '.

More specifically, it carries and filter core back flush pipe-line system 210 to go out clear liquid system 200, clear liquid carry and filter core back flush pipe-line system 210 contain with the clear liquid conveyer pipe 211 of the group one-to-one of filter core 12 and equally with the recoil medium conveyer pipe 212 of the group one-to-one of filter core, the output of clear liquid conveyer pipe 211 is connected with clear liquid conveying house steward 215 through the control valve 213 that one to one set up, the input of clear liquid conveyer pipe 211 is connected with the clear liquid input interface that is used for the clear liquid ejection of compact structural connection of the group of corresponding filter core, the input of recoil medium conveyer pipe 212 is connected with recoil medium conveying house steward 216 through the control valve 214 that one to one set up, the output of recoil medium conveyer pipe 212 is connected with the bypass of the clear liquid conveyer pipe of one-to-one.

In addition, the emptying system 200 further comprises a backflushing device 217, a backflushing medium input structure and a backflushing medium output structure are respectively arranged on a shell of the backflushing device 217, and the backflushing medium output structure is connected with the backflushing medium conveying main pipe 216.

The clear liquid discharge system 200 can realize the delivery of clear liquid and the simultaneous back flushing regeneration of the filter elements 12 of the same group according to the groups of the filter elements 12.

In addition, a flow regulating device 102 can be arranged between each filtering concentrator assembly 100 and the slurry discharging structure to be concentrated, and a back pressure control device 218 is arranged between a control valve 213 on each clear liquid conveying pipe 211 and a clear liquid conveying main pipe 215 on each clear liquid conveying pipe 211.

The flow regulating device 102 may be a flow regulating valve. The back pressure control device 218 may also be a valve with adjustable flow rate, so that the back pressure on the clear liquid delivery pipe 211 can be adjusted by adjusting the opening degree of the valve.

Because the flow regulating device 102 is arranged between each filtering concentrator assembly 100 and the slurry discharging structure to be concentrated, the flow of the slurry in the flow passage formed by connecting the raw liquid cavities 13 in series in each filtering concentrator assembly 100 can be balanced by controlling the flow regulating device 102, so that the flow speed of the slurry on the filtering surface in each filtering concentrator assembly 100 is close, and the anti-pollution performance of the filtering surface in each filtering concentrator assembly 100 is ensured.

After the flow rates of the slurry in the flow paths formed by the raw liquid chambers 13 connected in series in each of the filter concentrator modules 100 are balanced, the pressure difference between the raw liquid chamber 13 and the clear liquid chamber 14 in the tubular filter concentrator 10' having the same number in different filter concentrator modules 100 can be made substantially the same by adjusting the back pressure control devices 218. When the pressure difference between the original liquid chamber 13 and the clear liquid chamber 14 in the tubular filtration concentrator 10 ' with the same serial number in different filtration concentrator assemblies 100 is approximately the same, the tubular filtration concentrator 10 ' with the same serial number in different filtration concentrator assemblies 100 has similar operation conditions, and when the filter elements 12 of the same group are simultaneously backflushed and regenerated according to the groups of the filter elements 12, the backflush regeneration effect on the filter elements of the tubular filtration concentrator 10 ' with the same serial number in different filtration concentrator assemblies 100 is more balanced.

Optionally, the coprecipitation reaction system may further include a vapor-liquid separator 103, a shell of the vapor-liquid separator 103 is provided with a vapor-liquid mixed phase input structure, a separated liquid phase output structure, and a separated gas phase output structure, respectively, the vapor-liquid mixed phase input structure is connected to the concentrated slurry discharging structure, and the separated liquid phase output structure is connected to the concentrated slurry backflow structure B.

Optionally, the coprecipitation reaction system may further include a return pipe 104, where one end of the return pipe 104 is connected to the slurry feeding structure a to be concentrated, and the other end of the return pipe 104 is connected to the concentrated slurry discharging structure; the return line 104 is provided with at least a valve and a valve in the heat exchange cooler 105.

The slurry can be returned to the filtering and concentrating unit through the return pipe 104 for further filtering and concentrating. The temperature of the slurry rises during the concentration process and can be reduced by the heat exchange cooler 105.

In addition, a feeding pump 106 is arranged between the coprecipitation reaction unit and the filtration concentration unit.

Mode two

FIG. 4 is a schematic cross-sectional view of a filter concentrator in a co-precipitation reaction system according to an embodiment of the present disclosure. FIG. 5 is a schematic cross-sectional view of a filter concentrator in a co-precipitation reaction system according to an embodiment of the present disclosure. FIG. 6 is a schematic cross-sectional view of a filter concentrator in a co-precipitation reaction system according to an embodiment of the present disclosure.

In this embodiment, as shown in fig. 4, the cartridge 12 of the previous embodiment is replaced with a multi-channel cartridge from a tubular cartridge. A plurality of said axial channels 12A are provided in the multi-channel filter element.

It is contemplated that the multi-channel cartridge also has a first edge and a second edge that are perpendicular to each other, wherein the first edge can be considered a generatrix of a cylindrical surface formed by any of the internal tubes of the multi-channel cartridge (which coincides with the direction of the central axis of the housing 11 of the tube filter concentrator 10') and the second edge can be considered a circle formed by the bottom edge or the top edge of the cylindrical surface formed by any of the internal tubes of the multi-channel cartridge. Here, the filter area of the multi-channel filter element is equal to the product of the length of the first edge and the length of the second edge multiplied by the number of axial channels 12A.

The multi-channel cartridge has a large filtration area and, therefore, the diameter of the housing 11 of the candle filter concentrator 10' can be increased adaptively.

Mode III

In this embodiment, as shown in fig. 5, the filter element 12 is a toroidal filter element, i.e. has two filtering surfaces, an inner filtering surface and an outer filtering surface, and a raw liquid chamber 13 is arranged between the two filtering surfaces. Liquid purifying cavities 14 are arranged in the inner-layer filtering surface and between the outer-layer filtering surface and the shell 11.

It is contemplated that the loop filter element may also have a first edge and a second edge perpendicular to each other, wherein the first edge may be considered a generatrix of a cylindrical surface formed by the outer or inner filtration surface (in a direction coincident with the central axis of the housing 11 of the candle filter concentrator 10') and the second edge may be considered a circle formed by the bottom edge or the top edge of the cylindrical surface formed by the outer or inner filtration surface. The filter area of the annular filter element is equal to the product of the length of the outer filter surface corresponding to the first edge and the length of the second edge, and the product of the length of the inner filter surface corresponding to the first edge and the length of the second edge.

Mode IV

As shown in fig. 6, in this embodiment, the filter element 12 is a plate-type filter element, and the plate-type filter element divides the housing 11 into a plurality of cavities, a part of which is the raw liquid cavity 13 and a part of which is the clean liquid cavity 14.

It is contemplated that the panel cartridge also has a first edge and a second edge that are perpendicular to each other, wherein the first edge can be considered the length of the panel cartridge (in a direction that coincides with the direction of the central axis of the housing 11 of the candle filter concentrator 10') and the second edge can be considered the width of the panel cartridge. The product of the length of the first edge and the length of the second edge, such as the filter area of the plate filter elements, is multiplied by the number of the plate filter elements.

In summary, the filter concentrator of the third co-precipitation reaction system can be summarized as: in the filtering concentrator, the filter element is provided with a first edge and a second edge which are perpendicular to each other, the area of a filtering surface of the filter element is basically determined by the product of the length of the first edge and the length of the second edge, the direction of the length of the first edge is consistent with the direction of a central axis of a shell of the filtering concentrator, and the slurry feeding structure to be concentrated and the concentrated slurry discharging structure are respectively arranged on the shell of the filtering concentrator at positions at two ends of the central axis and are respectively communicated with two ends of a stock solution cavity. And, if a plane perpendicular to the central axis and intersecting the filter surface of the filter element is taken as a cross section: on the cross section, the stock solution cavities are distributed in the form of a first graph, the first graph is a closed graph, the shape of the closed graph is circular, annular or polygonal, the area, except the first graph, of the cross section, which is positioned in the shell of the filtering concentrator, is basically composed of a second graph and a third graph, the clear solution cavities are distributed in the form of the second graph, the filtering materials of the filter element are distributed in the form of the third graph, and the corresponding central points of the central axis on the cross section are close to or positioned in the first graph, the second graph or the third graph.

Fourth coprecipitation reaction system

The cleaning system is redesigned to solve the problems that the existing cleaning system needs to be temporarily installed on site, is high in construction strength and long in time and influences project construction progress, and the whole movable cleaning module is provided. The effluent system adopting the integral movable effluent module can be used in any coprecipitation reaction system. When the effluent system is used in different coprecipitation reaction systems, the composition of the effluent system may differ, but the overall structure is similar.

Fig. 7 is a three-dimensional structural diagram of a discharging system in a coprecipitation reaction system according to an embodiment of the present disclosure. Fig. 8 is a three-dimensional block diagram of the system of fig. 7 at another angle. Fig. 9 is a three-dimensional block diagram of the system of fig. 7 at another angle. Fig. 10 is a three-dimensional block diagram of the system of fig. 7 from another angle. Fig. 11 is a three-dimensional structure diagram of the system shown in fig. 10 after the electrical box is hidden. Fig. 12 is a main schematic view of the system shown in fig. 7. The purge systems shown in fig. 7-12 were actually designed for the second co-precipitation reaction system described above. When the purge system is used in different co-precipitation reaction systems, the overall structure remains similar to that shown in FIGS. 7-12, but can be locally modified as desired.

As shown in fig. 7-12, the integral movable discharging module specifically comprises: frame support 220, clear liquid delivery and filter element backwash piping system 210, functional container apparatus set 230, and the like.

The frame-type support 220 includes a support base 221 and a bridge 222 disposed on the support base 221, wherein a pipe-type facility installation area 223 is formed on one side of the support base 221 located on the bridge 222, and a functional container-type facility installation area 224 is formed in the bridge 222.

Clear solution is carried and filter core back flush pipe-line system 210 is installed pipeline class facility installing zone 223, clear solution is carried and filter core back flush pipe-line system 210 contain with the group one-to-one of filter core clear solution conveyer pipe 211 and equally with the recoil medium conveyer pipe 212 of the group one-to-one of filter core, the output of clear solution conveyer pipe 211 is connected with clear solution conveying main pipe 215 through the control valve 213 of one-to-one setting, the input of clear solution conveyer pipe 211 is connected with the clear solution input interface that is used for the clear solution ejection of compact structural connection with the group of corresponding filter core, the input of recoil medium conveyer pipe 212 is connected with recoil medium conveying main pipe 216 through the control valve 214 of one-to-one setting, the output of recoil medium conveyer pipe 212 is connected with the bypass of the clear solution conveyer pipe 211 of one-to-one.

The

control valves

213 and 214 may be pneumatic valves. By controlling the state of the corresponding control valve 213 and control valve 214, the operating state (filtration or back-flushing regeneration) of a particular group of filter elements can be controlled.

The functional container equipment group 230 is erected on the bridge 222 and located in the functional container facility installation area 224, the functional container equipment group 230 comprises a backflushing device 231, a backflushing medium input structure and a backflushing medium output structure are respectively arranged on a shell of the backflushing device 231, and the backflushing medium output structure is connected with the backflushing medium conveying main pipe 216. The backflushing medium can be either backflushing gas or backflushing liquid.

Typically, the filter cartridges are in group 2 or more, so the clear liquid delivery tubes 211 and the backflush media delivery tubes 212 of the clear liquid delivery and filter cartridge backflush tubing 210 can both be horizontally and laterally spaced apart so that the clear liquid delivery and filter cartridge backflush tubing 210 is disposed in the tubing installation area 223.

Because the clear liquid conveying pipes 211 and the backflushing medium conveying pipes 212 in the clear liquid conveying and filter element backflushing pipeline system 210 can be arranged horizontally and transversely at intervals, the central axes of the clear liquid conveying pipes 211 and the central axes of the backflushing medium conveying pipes 212 connected with the clear liquid conveying pipes 211 in a one-to-one correspondence mode can be located in the same vertical plane. In this way, the overall horizontal lateral width of the clear liquid delivery and filter element backwash tubing 210 may be saved.

Because the clear liquid conveying pipes 211 and the backflushing medium conveying pipes 212 in the clear liquid conveying and filter element backflushing pipeline system 210 can be arranged at intervals along the horizontal transverse direction, the clear liquid conveying main pipe 215 can have a clear liquid conveying main pipe horizontal transverse extension section for convenient arrangement, and the output ends of the clear liquid conveying pipes 211 in the clear liquid conveying and filter element backflushing pipeline system 210 are connected with the clear liquid conveying main pipe horizontal transverse extension section through the control valves 213 which are arranged one to one.

Similarly, the backflushing medium delivery manifold 216 may have a horizontal transverse extent of the backflushing medium delivery manifold to which the output end of the backflushing medium delivery pipe 212 in the clear liquid delivery and filter cartridge backflushing piping system 210 is connected via the control valve 214 disposed in a one-to-one relationship.

On this basis, the horizontal transverse extension section of the backflushing medium conveying header pipe can be positioned above the horizontal transverse extension section of the clear liquid conveying header pipe (as shown in fig. 8-9), and the backflushing medium conveying pipes 212 are positioned above the clear liquid conveying pipes 211 corresponding to one another. Therefore, the space can be saved, the pipeline arrangement is convenient, meanwhile, the recoil medium conveying pipe 212 can apply upward force to the clear liquid conveying pipe 211, and the clear liquid conveying pipe 211 can be conveniently positioned.

Thus, the whole pipeline system 210 for clear liquid conveying and filter core backwashing can be supported and fixed only by mounting a clear liquid conveying pipe mounting and positioning device 217 (the clear liquid conveying pipe mounting and positioning device 217 adopts a pipe clamp) with a simple structure on the supporting base 221 and connecting the clear liquid conveying pipe 211 with the clear liquid conveying pipe mounting and positioning device 217.

On the basis of the above-described overall movable type of the emptying module, the present application also provides improvements to the overall movable type of the emptying module, which improvements can be applied to the overall movable type of the emptying module in whole (combined) or in part (separate) to achieve specific functions or to solve specific problems.

Improvements in the first aspect

As shown in fig. 7-12, a pipe view mirror 218 is installed at the input end of the clear liquid delivery pipe 211, and a clear liquid input interface for connecting with a clear liquid discharge structure of a corresponding filter element group is connected to the pipe view mirror 218.

Specifically, the input end of the clear liquid conveying pipe 211 is provided with a vertical section, the pipe view mirror 218 is a vertical pipe view mirror and is installed on the vertical section, and the clear liquid input interface is an upper port of the vertical pipe view mirror.

After the pipeline viewing mirror 218 is installed at the input end of the clear liquid conveying pipe 211, the turbidity of the clear liquid in the clear liquid conveying pipe 211 can be observed through the pipeline viewing mirror 218, so as to determine whether the filter elements of the group corresponding to the clear liquid conveying pipe 211 are penetrated, and if the penetration occurs, the control valve 213 on the clear liquid conveying pipe 211 can be closed.

Install the pipeline sight glass 218 at the input of clear liquid conveyer pipe 211, not only can judge whether each group filter core takes place the penetration according to the group of filter core, reduce the investigation degree of difficulty, simultaneously, because pipeline sight glass 218 is close to recoil ware 231, like this, the accessible is close to recoil and is washed pipeline sight glass 218, guarantees the visibility of pipeline sight glass 218.

When the input of clear solution conveyer pipe 211 has vertical section, pipeline sight glass 218 adopts vertical pipeline sight glass and installs during on the vertical section, not only conveniently observe, can effectively avoid simultaneously to cross to filter rear-view mirror 218 and take place to block up.

Improvement of the second aspect

As shown in fig. 7 to 12, a pipe facility installation area 223 is formed on one side of the supporting base 221 located on the bridge 222, a pump equipment installation area 225 is formed on the other side of the supporting base, and a pump equipment maintenance operation area 226 is reserved between the pump equipment installation area 225 and the bridge 222.

The supernatant discharging system further includes a pump unit 240, the pump unit 240 is installed in the pump equipment installation area 225 and includes a positive pump 241 and a back-up pump (not shown in the figure) which are horizontally arranged at intervals, the positive pump 241 and the back-up pump are symmetrically arranged with a plumb surface which is arranged in the same direction as the horizontal longitudinal direction as a symmetry plane, the positive pump 241 and the back-up pump are mutually connected in parallel and are selectively connected to the supernatant conveying main pipe 215 through valves respectively to form a part of the supernatant conveying main pipe.

The pump unit 240 includes a positive pump 241 and a back-up pump arranged at a horizontal interval, that is, a redundant design is adopted, so as to ensure the stability of the operation of the pump unit 240. A pump equipment maintenance operation area 226 is ingeniously reserved between the pump equipment installation area 225 and the bridge 222, so that the field maintenance of the positive pump 241 and/or the standby pump is facilitated. In addition, the positive pump 241 and the backup pump are symmetrically designed, so that the weight distribution uniformity of the whole movable type discharging module can be improved, the operation vibration of the movable type discharging module is reduced, and the influence is smaller when the positive pump 241 and the backup pump are switched.

The significance of the above-described second aspect improvement applied to the first coprecipitation reaction system, the second coprecipitation reaction system, and the third coprecipitation reaction system is different.

When applied to the first coprecipitation reaction system or the second coprecipitation reaction system, since the first coprecipitation reaction system or the second coprecipitation reaction system is usually provided with a feed pump between the reaction vessel and the filter concentrator, the positive pump 241 and the backup pump can be used as a purge pump through the above-mentioned second aspect modification, and when the output port of the clear liquid delivery manifold 215 needs to be raised (which will be described in detail later), the clear liquid is prevented from flowing backwards.

When the co-precipitation reaction system is applied to the second co-precipitation reaction system, because the first co-precipitation reaction system usually needs to adopt negative pressure to discharge clear liquid, namely a pump needs to be arranged at the downstream of a clear liquid output flow path of the filter element for pumping, at the moment, the positive pump 241 and the standby pump actually provide filtration pressure difference for the filtration and concentration operation of the co-precipitation reaction and filtration and concentration integrated equipment. At this point, it becomes more important to integrate the pump unit 240 into the unitary movable purge module. In this case, the positive pump 241 and the back-up pump are preferably hose pumps.

In addition, as shown in fig. 7 to 12, the frame-type support 221 forms an electrical box mounting area on the side opposite to the pump equipment maintenance operation area 226 in both sides of the pump equipment mounting area 225; the overall movable type unclean module further comprises an electrical box 250, and the electrical box 250 is installed in the electrical box installation area.

In addition, the clear liquid delivery manifold 215 includes a lift section 215A located downstream of the positive and back-up pumps; the lifting section 215A is respectively provided with an output port of the clear liquid conveying main pipe, a cleaning liquid input port and a cleaning liquid output port; the cleaning liquid output port is connected to the backflushing medium conveying main pipe through a cleaning liquid conveying pipe 215B, and a control valve 215C is arranged on the cleaning liquid conveying pipe; an L-shaped cantilever 222A may be disposed on a side of the bridge 222 facing the pump device mounting area 225, and a vertical section of the L-shaped cantilever 222A may respectively connect and support a horizontal section where an output port of the clean liquid transporting main 215 is located and a horizontal section where the cleaning liquid input port is located.

In addition, the fluid delivery interfaces of the functional container equipment set 230 for external connection with the integral movable purge module and the fluid delivery interfaces of the pump set 240 for external connection with the integral movable purge module are oriented in the same horizontal and lateral direction uniformly and are not obstructed by the structure of the integral movable purge module.

Improvement of the third aspect

As shown in fig. 7 to 12, on the basis of the modification of the second aspect, the functional container apparatus set 230 further includes a heat exchange cooler 232, a clear liquid channel and a cooling medium channel separated from each other by a heat exchange wall are provided in the heat exchange cooler 232, a clear liquid inlet and a clear liquid outlet respectively connected to both ends of the clear liquid channel are provided on a housing of the heat exchange cooler 232, a cooling medium inlet and a cooling medium outlet respectively connected to both ends of the cooling medium channel are further provided on a housing of the heat exchange cooler 232, and the clear liquid inlet and the clear liquid outlet are connected in series to the clear liquid conveying manifold 215 so that the clear liquid channel constitutes a part of the clear liquid conveying manifold 215. The recuperator cooler 232 may use water as the cooling medium.

The clear liquid can be cooled by the heat exchange cooler 232, and the growth conditions of the ternary precursor particles are destroyed, so that the phenomenon that the ternary precursor particles are further generated in the clear liquid to cause the blockage of the clear liquid conveying main pipe 215, particularly the positive pump 241 and the standby pump is avoided. In addition, when the positive pump 241 and the backup pump adopt the hose pump, the heat exchange cooler 232 can protect the hose in the hose pump after cooling the clear liquid, and the service life of the hose pump is prolonged.

Further, the heat exchange cooler 232 is a vertical container, the clear liquid inlet is located at the upper end of the heat exchange cooler, the clear liquid outlet is located at the lower end of the heat exchange cooler 232, and a pipe section, located between the clear liquid outlet and the positive pump 241 and the backup pump, on the clear liquid conveying header 215 is connected with the clear liquid outlet and the positive pump 241 and the backup pump through the bottom of the pump equipment maintenance operation area 226.

After the heat exchange cooler 232 adopts a vertical container, the occupied area is saved, and the installation on the bridge frame 222 is convenient. On this basis, a clear liquid inlet is arranged at the upper end of the heat exchange cooler 232, a clear liquid outlet is arranged at the lower end of the heat exchange cooler 232, and a pipe section, which is positioned between the clear liquid outlet and the positive pump 241 and the standby pump, on the clear liquid conveying header pipe 215 connects the clear liquid outlet with the positive pump 241 and the standby pump through the bottom of the pump equipment maintenance operation area 226, so that a space as much as possible can be reserved for the pump equipment maintenance operation area 226, and the operation is convenient.

Further, the clear liquid channel is of a vertical tubular structure, the clear liquid inlet is located at the top of the heat exchange cooler 232 and is communicated with the upper port of the vertical tubular structure, and the clear liquid outlet is located at the bottom of the heat exchange cooler 232 and is communicated with the lower port of the vertical tubular structure; and the cooling medium channel is a vertical annular pipe located between the vertical tubular structure and the shell of the heat exchange cooler 232, and the cooling medium inlet and the cooling medium outlet are respectively located at the upper and lower end side portions of the vertical annular pipe.

In addition, a waste water discharge branch 219 is connected to a pipe section of the clear liquid conveying main pipe 215 between the clear liquid outlet and the positive pump 241 and the back-up pump, the waste water discharge branch 219 is located at the lowest position of the height of all liquid flow paths in the integral movable type supernatant module, and a discharge valve is arranged on the waste water discharge branch 219.

Improvement of the fourth aspect

As shown in fig. 7 to 12, the backflushing medium input structure of the backflushing device 231 includes a backflushing liquid input structure 231A and a compressed gas input structure 231B, and a backflushing liquid overflow port 231C is further provided on the housing of the backflushing device 231, the backflushing liquid overflow port 231C is connected to the output port of the clear liquid conveying main pipe 215 through a backflushing liquid overflow pipe 231D, so that the output port of the clear liquid conveying main pipe 215 is integrally higher than the backflushing liquid overflow port 231C, and an ascending section 231E is provided on the backflushing liquid overflow pipe 231D. In addition, a control valve may be further provided on the back flush overflow pipe 231D.

Typically, the clear liquid delivery manifold 215 comprises a lifting section 215A downstream of the clear liquid delivery manifold, and the outlet of the clear liquid delivery manifold 215 is disposed on the lifting section 215A.

Conventionally, the backflushing device 231 then uses gas backflushing or liquid backflushing, and therefore the backflushing medium input structure is either the backflushing liquid input structure 231A or the compressed gas input structure 231B. Here, the backflushing medium input structure of the backflushing device 231 includes both the backflushing liquid input structure 231A and the compressed gas input structure 231B, so that it is possible to select between gas backflushing and liquid backflushing, or to combine gas backflushing and liquid backflushing.

Based on this, this application can also adopt this kind of innovative recoil mode, namely pour into recoil liquid and compressed gas into recoil ware 231 through recoil liquid input structure 231A and compressed gas input structure 231B respectively, like this, the inside below of recoil ware 231 is recoil liquid and the top is compressed gas to can utilize compressed gas to promote the recoil liquid backward flow filter core fast, conventional liquid recoil utilizes the diaphragm pump to provide recoil power, and the liquid recoil effect of this kind of mode is limited. But after the innovative recoil mode is adopted, the recoil force is larger.

In addition, by controlling the volume of the backflushing liquid in the backflushing device 231, the volume of the backflushing liquid can be just equal to the sum of the volumes according to the sum of the volumes of the stock solution cavities of the filter element corresponding to each backflushing (for example, the volume of the backflushing liquid is controlled to be 1-1.2 times of the sum of the volumes), so that a better backflushing effect is achieved, the amount of the backflushing liquid with small effect is reduced, and energy consumption is further saved.

Therefore, in order to better control the volume of the back-flushing liquid in the back-flushing device 231, a back-flushing liquid overflow port 231C is provided on the housing of the back-flushing device 231, so as to control the liquid level height of the back-flushing liquid in the back-flushing device 231 and further control the volume of the back-flushing liquid in the back-flushing device 231. For convenience, the backwash liquid overflow port 231C is connected to the outlet port of the clear liquid delivery manifold 215 via a backwash liquid overflow pipe 231D.

When the back flush overflow port 231C is provided in the housing of the back flush device 231 and the back flush overflow port 231C is connected to the output port of the clear liquid delivery manifold 215 through the back flush overflow pipe 231D, in order to prevent the compressed gas from leaking from the back flush overflow port 231C and the back flush overflow pipe 231D, it is required that the output port of the clear liquid delivery manifold 215 is entirely higher than the back flush overflow port 231C, and the back flush overflow pipe 231D is provided with the rising section 231E, so that a liquid seal can be formed in the back flush overflow pipe 231D to prevent the compressed gas from leaking.

Improvement of fifth aspect

As shown in fig. 7 to 12, the functional container equipment set further comprises a vapor-liquid separator 233, and a vapor-liquid mixed phase input structure 233A, a separated liquid phase output structure 233B and a separated gas phase output structure 233C are respectively provided on the housing of the vapor-liquid separator 233.

When the modification of the fifth aspect is applied to the third coprecipitation reaction system, the vapor-liquid separator 233 and the vapor-liquid separator 103 may be the same device, and in this case, the vapor-liquid mixed phase input structure 233A, the separated liquid phase output structure 233B, and the separated gas phase output structure 233C of the vapor-liquid separator 233 may be connected to the corresponding pipes in the manner shown in fig. 1.

When the above-described modification of the fifth aspect is applied to the first coprecipitation reaction system or the second coprecipitation reaction system, the vapor-liquid mixed phase input structure 233A of the vapor-liquid separator 233 may be communicated with the compressed gas input structure 231B of the backflusher 231 through a communicating pipe, the communicating pipe is connected to a compressed gas source through a gas supply bypass 231D, a control valve 233D is connected in series on the communicating pipe between the vapor-liquid mixed phase input structure 233A and the gas supply bypass 231D, and the gas supply bypass 231D forms a part of the compressed gas input structure 231B.

Thus, when the air pressure in the back flush device 231 needs to be released, the control valve 233D may be opened, and the two-phase gas-liquid in the back flush device 231 may enter the gas-liquid separator 103 for gas-liquid separation.

Preferably, the vapor-liquid mixed phase input structure 233A includes a vapor-liquid mixed phase input pipe tangential to a sidewall of the vapor-liquid separator 233, and the communicating pipe is disposed coaxially with the vapor-liquid mixed phase input pipe.

Further, the separated liquid phase output structure 233B is connected to a waste water discharge branch 219.

The contents related to the present application are explained above. Those of ordinary skill in the art will be able to implement the present application based on these teachings. All other embodiments, which can be derived by a person skilled in the art from the description above without inventive step, shall fall within the scope of patent protection.

Claims

1. A coprecipitation reaction system is characterized in that: the coprecipitation reaction system is a first coprecipitation reaction system or a second coprecipitation reaction system;

when the coprecipitation reaction system is a first coprecipitation reaction system, the first coprecipitation reaction system employs a coprecipitation reaction unit and a filtering concentration unit that are independent of each other, and in the first coprecipitation reaction system:

the coprecipitation reaction unit comprises a reaction kettle, the reaction kettle is provided with a shell and an inner cavity, a raw material feeding structure, a slurry discharging structure to be concentrated and a concentrated slurry backflow structure are respectively arranged on the shell of the reaction kettle, the raw material feeding structure, the slurry discharging structure to be concentrated and the concentrated slurry backflow structure are respectively communicated with the inner cavity of the reaction kettle, and a stirring structure is arranged in the inner cavity of the reaction kettle;

the filtration and concentration unit comprises a filtration concentrator, the filtration concentrator is provided with a shell and a filter element, the filter element forms a stock solution cavity and a clear solution cavity in the shell of the filtration concentrator, a slurry feeding structure to be concentrated, a concentrated slurry discharging structure and a clear solution discharging structure are respectively arranged on the shell of the filtration concentrator, the slurry feeding structure to be concentrated and the concentrated reaction slurry discharging structure are respectively communicated with the stock solution cavity, and the clear solution discharging structure is communicated with the clear solution cavity;

the slurry discharging structure to be concentrated is used for being connected with the slurry feeding structure to be concentrated through a pipeline, the concentrated slurry discharging structure is used for being connected with the concentrated slurry backflow structure through a pipeline, the raw material feeding structure is used for being connected with co-precipitation reaction raw material supply equipment, and the clear liquid discharging structure is used for being connected with a clear liquid discharging system;

when the coprecipitation reaction system adopts a second coprecipitation reaction system, the second coprecipitation reaction system adopts a coprecipitation reaction and filtration concentration integrated device, and in the second coprecipitation reaction system:

the coprecipitation reaction and filtration concentration integrated equipment comprises a reaction kettle and a filter element which are assembled together, wherein the reaction kettle is provided with a shell and an inner cavity, a raw material feeding structure, a concentrated slurry discharging structure and a clear liquid discharging structure are respectively arranged on the shell of the reaction kettle, a stirring structure is arranged in the inner cavity of the reaction kettle, and the filter element is arranged in the shell of the filtration concentrator to form a raw liquid cavity and a clear liquid cavity;

the inner cavity of the reaction kettle is communicated with the stock solution cavity, the raw material feeding structure and the concentrated slurry discharging structure are respectively communicated with the inner cavity of the reaction kettle, the raw material feeding structure is used for being connected with codeposition reaction raw material supply equipment, the clear solution discharging structure is communicated with the clear solution cavity, and the clear solution discharging structure is used for being connected with a clear solution discharging system;

no matter the coprecipitation reaction system is a first coprecipitation reaction system or a second coprecipitation reaction system, the corresponding effluent system adopts an overall movable effluent module, and the overall movable effluent module specifically comprises:

the frame-type support comprises a support base and a bridge frame arranged on the support base, wherein a pipeline facility installation area is formed on one side of the bridge frame on the support base, a pump equipment installation area is formed on the other side of the bridge frame, a pump equipment maintenance operation area is reserved between the pump equipment installation area and the bridge frame, and a functional container facility installation area is formed in the bridge frame;

the system comprises a clear liquid conveying and filter element backwashing pipeline system, a pipeline facility installation area and a pipeline facility installation area, wherein the clear liquid conveying and filter element backwashing pipeline system is installed in the pipeline facility installation area and comprises clear liquid conveying pipes which correspond to the groups of the filter elements one to one and backwashing medium conveying pipes which correspond to the groups of the filter elements one to one, the output ends of the clear liquid conveying pipes are connected with a clear liquid conveying main pipe through one-to-one control valves, the input ends of the clear liquid conveying pipes are connected with clear liquid input interfaces which are used for being connected with clear liquid discharging structures of the groups of the corresponding filter elements, the input ends of the backwashing medium conveying pipes are connected with a backwashing medium conveying main pipe through one-to-one control valves, and the output ends of the backwashing medium conveying pipes are connected with bypasses of the clear liquid conveying pipes which correspond to one;

the functional container equipment group is erected on the bridge and is positioned in the functional container facility installation area, the functional container equipment group comprises a backflushing device, a backflushing medium input structure and a backflushing medium output structure are respectively arranged on a shell of the backflushing device, and the backflushing medium output structure is connected with the backflushing medium conveying main pipe;

the pump set is arranged in the pump equipment installation area and comprises a positive pump and a standby pump which are horizontally and transversely arranged at intervals, the positive pump and the standby pump are symmetrically arranged by taking a plumb surface which is arranged in the same direction as the horizontal longitudinal direction as a symmetry plane, and the positive pump and the standby pump are mutually connected in parallel and are selectively connected to the main clear liquid conveying pipe through valves respectively to form part of the main clear liquid conveying pipe.

2. The co-precipitation reaction system of claim 1, wherein: an electrical box mounting area is formed on one side of the frame type support, which is located on two sides of the pump equipment mounting area and is opposite to the pump equipment maintenance operation area; the whole movable type clearing module further comprises an electrical box, and the electrical box is installed in an electrical box installation area.

3. The co-precipitation reaction system of claim 1, wherein: the functional container equipment set comprises a heat exchange cooler, a clear liquid channel and a cooling medium channel which are separated from each other through a heat exchange wall are arranged in the heat exchange cooler, a clear liquid inlet and a clear liquid outlet which are respectively connected with two ends of the clear liquid channel are arranged on a shell of the heat exchange cooler, a cooling medium inlet and a cooling medium outlet which are respectively connected with two ends of the cooling medium channel are also arranged on the shell of the heat exchange cooler, and the clear liquid inlet and the clear liquid outlet are connected on a clear liquid conveying main pipe in series so that the clear liquid channel forms a part of the clear liquid conveying main pipe; the positive and backup pumps are located downstream of the clear liquid delivery header with respect to the heat exchange chiller.

4. The co-precipitation reaction system of claim 3, wherein: the heat exchange cooler is a vertical container, the clear liquid inlet is located at the upper end of the heat exchange cooler, the clear liquid outlet is located at the lower end of the heat exchange cooler, and the pipe section between the clear liquid outlet and the pump set on the clear liquid conveying header pipe is connected with the clear liquid outlet and the positive pump and the standby pump through the bottom of a pump equipment maintenance operation area.

5. The co-precipitation reaction system of claim 1, wherein: and the fluid conveying interface in the functional container equipment group and the fluid conveying interface in the pump group, which are connected with the outside of the integral movable discharging module, face the same horizontal and transverse direction uniformly and are not shielded by the structure in the integral movable discharging module.

6. The co-precipitation reaction system of claim 1, wherein: the clear liquid conveying main pipe comprises a lifting section positioned at the downstream of the positive pump and the standby pump; the lifting section is respectively provided with an output port of the clear liquid conveying main pipe, a cleaning liquid input port and a cleaning liquid output port; the cleaning liquid output port is connected to the backflushing medium conveying main pipe through a cleaning liquid conveying pipe, and a control valve is arranged on the cleaning liquid conveying pipe; an L-shaped cantilever can be arranged on one side, facing the mounting area of the pump equipment, of the bridge, and the vertical section of the L-shaped cantilever can be used for respectively connecting and supporting the horizontal section where the output port of the clear liquid conveying main pipe is located and the horizontal section where the cleaning liquid input port is located.

7. The co-precipitation reaction system of claim 1, wherein: if the group of the filter elements is more than or equal to 2, the clear liquid conveying pipes and the clear liquid conveying pipes in the filter element backwashing pipeline system are horizontally and transversely arranged at intervals by the backwashing medium conveying pipes; the central axis of the clear liquid conveying pipe and the central axis of the backflushing medium conveying pipe which is correspondingly connected with the clear liquid conveying pipe one by one are positioned in the same vertical plane; the clear liquid conveying main pipe is provided with a clear liquid conveying main pipe horizontal transverse extension section, and the output end of a clear liquid conveying pipe in the clear liquid conveying and filter element backwashing pipeline system is connected with the clear liquid conveying main pipe horizontal transverse extension section through a control valve arranged in a one-to-one mode; the backflushing medium conveying main pipe is provided with a horizontal transverse extension section of the backflushing medium conveying main pipe, and the output end of a backflushing medium conveying pipe in the clear liquid conveying and filter core backflushing pipeline system is connected with the horizontal transverse extension section of the backflushing medium conveying main pipe through one-to-one control valve; the horizontal transverse extension section of the backflushing medium conveying main pipe is positioned above the horizontal transverse extension section of the clear liquid conveying main pipe, and the backflushing medium conveying pipes are positioned above the clear liquid conveying pipes which correspond to one another one by one; and a clear liquid conveying pipe mounting and positioning device is mounted on the supporting base, and the clear liquid conveying pipe is connected with the clear liquid conveying pipe mounting and positioning device.

8. The coprecipitation reaction system of claim 1, wherein: the functional container equipment group comprises a vapor-liquid separator, and a shell of the vapor-liquid separator is respectively provided with a vapor-liquid mixed phase input structure, a separated liquid phase output structure and a separated gas phase output structure;

the backflushing medium input structure of the backflushing device comprises a backflushing liquid input structure and a compressed gas input structure, the compressed gas input structure is communicated with the vapor-liquid mixed phase input structure through a communicating pipe, the communicating pipe is connected with a compressed gas source through a gas supply bypass, a control valve is connected in series between the vapor-liquid mixed phase input structure and the gas supply bypass on the communicating pipe, and the gas supply bypass forms a part of the compressed gas input structure.

9. The co-precipitation reaction system of claim 1, wherein: the recoil medium input structure of recoil ware contains recoil liquid input structure and compressed gas input structure, just still be equipped with the recoil liquid overflow mouth on the shell of recoil ware, the recoil liquid overflow mouth is connected to through the recoil liquid overflow pipe the delivery outlet of clear liquid conveying main pipe, then the delivery outlet of clear liquid conveying main pipe is whole to be higher than the recoil liquid overflow mouth, just be equipped with the ascending section on the recoil liquid overflow pipe.

10. The utility model provides a clear system of play of coprecipitation reaction system which characterized in that: is a purge system in the coprecipitation reaction system according to any one of claims 1 to 9.