CN113248086B

CN113248086B - Washing purification and salt separation treatment system for industrial waste salt

Info

Publication number: CN113248086B
Application number: CN202110669154.XA
Authority: CN
Inventors: 柏明锁; 俞德仁; 李元友; 孙小峰
Original assignee: Beijing Zhonglixinda Environmental Technology Co ltd
Current assignee: Beijing Zhonglixinda Environmental Technology Co ltd
Priority date: 2021-06-17
Filing date: 2021-06-17
Publication date: 2021-10-08
Anticipated expiration: 2041-06-17
Also published as: CN113248086A

Abstract

The invention relates to a washing purification and salt separation treatment system for industrial waste salt, which comprises a waste salt washing device, wherein the waste salt washing device comprises a washing tank body, a salt feeding port, a water outlet, a filter screen, a salt feeding device and a stirrer; a stirrer is arranged at the top of the washing tank body, a stirring rod of the stirrer extends into a tank cavity of the washing tank body, a salt throwing port is further formed at the top of the washing tank body, and a salt throwing device is mounted on the salt throwing port; the filter screen is arranged between the salt throwing device and the salt throwing port; the upper part of the side wall of the water washing tank body is also provided with a water outlet. The salt separation treatment system comprises a waste salt water washing device, an adsorption separation device, a nanofiltration integrated device, a reverse osmosis device, a catalytic wet oxidation device, a coagulating sedimentation device and a biochemical treatment device. The washing purification and salt separation treatment system for the industrial waste salt realizes the grading treatment and the gradient utilization of the waste water, and is ecological and environment-friendly.

Description

Washing purification and salt separation treatment system for industrial waste salt

Technical Field

The invention relates to the technical field of sewage treatment, in particular to a washing purification and salt separation treatment system for industrial waste salt.

Background

The industrial waste salt slag refers to inorganic waste salt containing organic matters, other toxic and harmful substances and water generated in the industrial production process, and mainly comes from the processes of solid-liquid separation, solution concentration and crystallization, pretreatment of process wastewater in related industries and the like in the petrochemical industry, the pesticide industry, the medicine industry and the fine chemical industry; the coal chemical industry waste salt is a large amount of inorganic waste salt produced by using a traditional evaporation concentration process and a traditional device in the process of converting coal into gas, liquid and solid fuel or chemicals by using coal as a raw material through chemical processing, but because the inorganic waste salt also contains a small amount of inorganic impurities and toxic and harmful substances besides a large amount of NaCl, the inorganic waste salt cannot be directly used as industrial raw material salt and cannot be used for food or medical use, the economic value is low, and the inorganic waste salt is not sold in the market, the operation cost for treating the coal chemical industry waste water by enterprises is overhigh and difficult to bear, so most of manufacturers stockpile the waste salt. Waste salt generated in the coal chemical industry production process is definitely listed in the national hazardous waste list passed in 2016, the current situation has attracted high attention of relevant people at home and abroad at present, and how to effectively treat the waste salt in the coal chemical industry and make the sodium salt contained in the waste salt in the coal chemical industry recycled becomes the key point of the research on the treatment of the waste salt in the coal chemical industry and is also a difficult point.

Disclosure of Invention

Aiming at the restriction limitation existing above, in order to solve the defect that the waste salt can not be effectively treated in the prior art, the invention provides a system for washing, purifying and salt-separating treatment of industrial waste salt, which can efficiently, reliably, economically and safely treat the industrial waste salt and realize the resource utilization of the industrial waste salt.

In order to solve the problems, the invention adopts the following technical scheme:

one of the purposes of the invention is to provide a washing and purifying system of industrial waste salt, which comprises a waste salt washing device;

the waste salt water washing device comprises a water washing tank body, a salt feeding port, a water outlet, a filter screen, a salt feeding device and a stirrer;

the top of the washing tank body is provided with a stirrer, a stirring rod of the stirrer extends into a tank cavity of the washing tank body, the top of the washing tank body is also provided with a salt throwing port, and a salt throwing device is arranged on the salt throwing port; the filter screen is arranged between the salt throwing device and the salt throwing port; a water outlet is also formed in the upper part of the side wall of the washing tank body;

the salt throwing port comprises an inner wall and an outer wall, the inner wall is arranged in the outer wall, a gap is formed in the upper part between the inner wall and the outer wall, and the lower part is communicated; the upper edge of the inner wall is lower than that of the outer wall;

the salt throwing device comprises a first pressing cap, a second pressing cap, a sealing ring, a sealing valve and a salt throwing funnel; the first pressing cap is connected with the outer wall of the salt throwing port, and the second pressing cap, the sealing ring and the sealing valve are sequentially arranged in a cavity among the first pressing cap, the outer wall and the inner wall from top to bottom, so that the second pressing cap, the sealing ring and the sealing valve are pressed and fixed in the cavity by the first pressing cap;

the first pressing cap, the second pressing cap and the sealing ring are provided with coaxial central through holes; the upper part of the sealing valve is provided with an opening, and the lower part of the sealing valve is provided with a duckbill valve; and the funnel pipe of the salt feeding funnel sequentially penetrates through the central through hole and the duckbill valve of the sealing valve to be arranged in the salt feeding device and is communicated with the inside of the washing tank body.

Preferably, the upper edge of the sealing valve is provided with an outer ring, and the outer ring is provided with a first groove with a downward opening; the inner wall is arranged in the first groove;

the sealing ring is of a cup-shaped structure, the opening direction is upward, and a central through hole is formed in the bottom of the sealing ring;

the second pressing cap is of a cylindrical structure with a central through hole, and is provided with a second groove with a downward opening direction and matched with the side wall of the sealing ring correspondingly; the side wall of the sealing ring is arranged in the second groove;

the upper edge of the sealing valve is tightly contacted with the bottom of the sealing ring;

the first pressing cap is of a barrel-shaped structure, the opening direction is downward, the interior of the first pressing cap is hollow, and a central through hole is formed in the center of the upper bottom surface of the first pressing cap.

Preferably, a supporting wall is further installed on the top of the outer wall of the salt throwing port, and the inner wall of the first pressing cap is connected with the supporting wall; the outer wall of the second compression cap is in close contact with the inner wall of the support wall; the bottom of the side wall of the first compression cap is in close contact with the top of the outer wall; the bottom of the upper bottom surface of the first compression cap is in close contact with the top of the upper bottom surface of the second compression cap.

Preferably, a limit groove is formed in the side edge of the central through hole in the upper bottom surface of the first pressing cap; and a limiting block corresponding to the limiting groove is arranged on the funnel tube of the salt feeding funnel.

The invention also aims to provide a salt separating treatment system for industrial waste salt, which comprises a waste salt washing device, an adsorption separation device, a nanofiltration integrated device, a reverse osmosis device, a catalytic wet oxidation device, a coagulating sedimentation device and a biochemical treatment device;

the middle of waste salt washing device at the top is equipped with the mixer, the stirring rod of mixer extend into the jar intracavity of waste salt washing device, waste salt washing device has still seted up at the top and has thrown the salt mouth, waste salt washing device's delivery port and adsorption separation device's water inlet pass through the pipeline intercommunication, adsorption separation device's permeate liquid conveyer pipe and the water inlet of receiving and filtering the integrated equipment be linked together, adsorption separation device's concentrate conveyer pipe and catalytic wet oxidation device's water inlet are linked together, receive and filter the permeate liquid conveyer pipe of integrated equipment and reverse osmosis equipment's water inlet intercommunication, receive and filter the concentrate conveyer pipe of integrated equipment and the water inlet of coagulating sedimentation device and be linked together, biochemical treatment device include oxygen deficiency pond and clear water pond, catalytic wet oxidation device's play liquid end be linked together through a degradation liquid pipeline and biochemical treatment device's oxygen deficiency pond, the coagulating sedimentation device comprises a sedimentation device, the liquid outlet end of the sedimentation device is communicated with the anoxic tank of the biochemical treatment device through a supernatant liquid conveying pipeline, and the permeate liquid conveying pipeline of the reverse osmosis device is communicated with the clean water tank of the biochemical treatment device.

Preferably, the adsorption separation device comprises an adsorption separation tank body, a water inlet pipe, a filtrate conveying pipe, an alkali liquor inlet pipe, a desorption liquid conveying pipe, a molecular sieve discharging pipe and a dosing tank;

a filtrate conveying pipe and an alkali liquor inlet pipe are respectively arranged on two sides of the top of the tank body of the adsorption separation tank; a water inlet pipe and a desorption liquid conveying pipe are arranged at the bottom of the adsorption separation tank body; a molecular sieve discharging pipe is arranged on the side wall of the tank body of the adsorption separation tank; an upper filter plate and a lower filter plate are arranged in the tank body of the adsorption separation tank; a molecular sieve is arranged between the upper filter plate and the lower filter plate; the center of the top of the tank body of the adsorption separation tank is also provided with a stirring device, and a stirring paddle of the stirring device is also arranged between the upper filter plate and the lower filter plate;

the dosing box is provided with a dosing port; and the dosing tank is also provided with a dosing pump communicated with the alkali liquor inlet pipe.

Preferably, the sedimentation equipment of the coagulating sedimentation device is connected with a sludge pump at the water outlet end of the bottom, the sludge pump is communicated with a filter press through a pipeline, and one side of the filter press is connected with sludge outward transportation equipment.

Preferably, the biochemical treatment device is also provided with an aerobic tank and an MBR membrane tank between the anoxic tank and the clean water tank, the upper part of the anoxic tank is provided with an anoxic tank water outlet communicated with the aerobic tank, and the upper part of the aerobic tank is provided with an aerobic tank water outlet communicated with the MBR membrane tank.

Preferably, the bottom of the aerobic tank is provided with a plurality of aerobic tank aeration heads, the bottom of the MBR membrane tank is provided with a plurality of membrane tank aeration heads, and the aerobic tank aeration heads and the membrane tank aeration heads are communicated with an air blower arranged outside the biochemical treatment device through pipelines.

Preferably, an MBR membrane module is installed in the MBR membrane tank, the MBR membrane module is provided with a self-priming pump, the liquid inlet end of the self-priming pump is communicated with the liquid outlet end of the MBR membrane module through a pipeline, and the liquid outlet end of the self-priming pump is communicated with the clean water tank through a pipeline.

Preferably, the bottom of the MBR membrane tank is also provided with a lift pump, the lift pump is connected with a return pipe, and the outflow end of the return pipe extends into the anoxic tank.

Preferably, the reverse osmosis equipment is also connected with a concentrated solution conveying pipeline for outputting concentrated solution to be used as raw materials in the chlor-alkali industry.

Due to the adoption of the structure, compared with the prior art, the invention has the beneficial effects that:

(1) the treatment system can carry out high-efficiency and environment-friendly treatment on the waste salt in the coal chemical industry, and achieves the purposes of grading treatment and gradient utilization, and the arrangement of the nanofiltration integrated equipment and the coagulating sedimentation device realizes the effective treatment on the divalent and trivalent ions in the waste salt in the coal chemical industry; concentrated solution outlet end through at reverse osmosis equipment sets up concentrated solution pipeline, has realized high-efficient processing and thorough zero release to coal chemical industry high concentration brine waste to carry out resource utilization to wherein the crystalline salt, both solved the environmental problem that produces the danger and give up, carried out resource regeneration again to the danger and used, not only obtain considerable economic benefits, still promoted the healthy continuous stable development of chemical industry.

(2) The waste salt washing device is provided with a filter screen and a salt throwing device; the filter screen can effectively filter water-insoluble impurities such as suspended matters, floaters and the like in the waste salt, the pressure of a subsequent treatment process is reduced, and the filter screen is arranged between the salt throwing device and the salt throwing port, so that the filter screen is very convenient to disassemble.

(3) The salt throwing device is provided with the first pressing cap, the second pressing cap, the sealing ring and the sealing valve, wherein the sealing ring and the sealing valve are of two-stage sealing structures, so that smell in the wastewater in the salt throwing process and after the salt throwing is finished can be effectively prevented from drifting, and the health of a human body is protected.

(4) According to the salt throwing device, the first pressing cap is provided with the limiting groove and the limiting block which are matched with the salt throwing funnel, so that the position of the salt throwing funnel can be simply and effectively fixed, and the charging is convenient.

Drawings

FIG. 1 is a schematic structural diagram of a salt adding device according to the present invention;

FIG. 2 is a schematic structural diagram of a salt feeding funnel of the present invention;

FIG. 3 is a schematic structural view of a combination of a second pressing cap, a sealing ring and a sealing valve according to the present invention;

FIG. 4 is a schematic structural view of a first impaction cap of the present invention;

FIG. 5 is a flow chart of the overall process of the industrial waste salt recycling system of the present invention;

FIG. 6 is a schematic structural view of an adsorption separation apparatus according to the present invention.

Description of reference numerals:

1. the waste salt washing device comprises a waste salt washing device, 11 parts of a stirrer, 111 parts of a stirring rod, 12 parts of a salt feeding port, 121 parts of an outer wall, 122 parts of an inner wall, 123 parts of a support wall, 13 parts of a first pressing cap, 131 parts of a limiting groove, 132 parts of a central through hole, 14 parts of a second pressing cap, 141 parts of a second groove, 15 parts of a sealing ring, 16 parts of a sealing valve, 161 parts of a first groove, 17 parts of a washing tank body, 18 parts of a salt feeding funnel, 181 parts of a funnel pipe, 182 parts of a limiting block;

2. the device comprises an adsorption separation device, 21, an adsorption separation tank body, 22, a water inlet pipe, 221, a first electric valve, 23, a filtrate conveying pipe, 231, a second electric valve, 24, an alkali liquid inlet pipe, 241, a third electric valve, 25, a desorption liquid conveying pipe, 251, a fourth electric valve, 26, a stirring device, 27, an upper filter plate, 28, a lower filter plate, 29, a molecular sieve, 30, a dosing pump, 31, a dosing tank, 311, a dosing port, 32, a molecular sieve discharging pipe, 321 and a manual valve;

3. nanofiltration integrated equipment; 4. reverse osmosis equipment, 41. a concentrated solution conveying pipeline; 5. a catalytic wet oxidation device 51, a degradation liquid conveying pipeline; 6. the system comprises a coagulating sedimentation device, 61 precipitation equipment, 62 supernatant conveying pipeline, 63 sludge pump, 64 filter press, 65 sludge outward transport equipment, 7 biochemical treatment device, 71 anoxic tank, 72 clean water tank, 73 aerobic tank, 731 aerobic tank aeration head, 74 MBR membrane tank, 741 membrane tank aeration head, 742 MBR membrane module, 743 self-priming pump, 744 lift pump, 745 reflux pipe and 75 blower.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below. It is to be understood that the description herein is only illustrative of the present invention and is not intended to limit the scope of the present invention.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, and the terms used herein in the specification of the present invention are for the purpose of describing particular embodiments only and are not intended to limit the present invention. The reagents and instruments used in the present invention are commercially available, and the characterization means involved can be referred to the description in the prior art, which is not repeated herein.

Example 1

The invention relates to a recycling treatment system for industrial waste salt, wherein a waste salt washing device 1 comprises a washing tank body 17, a salt feeding port 12, a water outlet, a filter screen, a salt feeding device and a stirrer 11;

the top of the washing tank body is provided with a stirrer 11, a stirring rod 111 of the stirrer extends into a tank cavity of the washing tank body 17, the top of the washing tank body 17 is also provided with a salt feeding port 12, and the salt feeding port 12 is provided with a salt feeding device; the filter screen is arranged between the salt throwing device and the salt throwing port 12; the upper part of the side wall of the washing tank body is also provided with a water outlet;

the salt throwing port 12 comprises an inner wall 122 and an outer wall 121, wherein the inner wall 122 is arranged in the outer wall 121, a gap is formed between the inner wall 122 and the outer wall 121 at the upper part, and the lower parts are communicated; the upper edge of the inner wall 122 is lower than the upper edge of the outer wall 121;

as shown in fig. 1 to 4, the salt adding device of the present invention includes a first pressing cap 13, a second pressing cap 14, a sealing ring 15, a sealing valve 16, and a salt adding funnel 18; the first pressing cap 13 is connected with the outer wall 121 of the salt feeding port 12, and the second pressing cap 14, the sealing ring 15 and the sealing valve 16 are sequentially arranged in a cavity among the first pressing cap 13, the outer wall 121 and the inner wall 122 from top to bottom, so that the second pressing cap 14, the sealing ring 15 and the sealing valve 16 are pressed and fixed in the cavity by the first pressing cap 13;

the first pressing cap 13, the second pressing cap 14 and the sealing ring 15 are provided with coaxial central through holes 132; the upper part of the sealing valve 16 is open, and the lower part is a duckbill valve; the funnel pipe 181 of the salt throwing funnel 18 passes through the central through hole and the duckbill valve of the sealing valve 16 in sequence, is arranged in the salt throwing device, and is communicated with the interior of the water washing tank body 17.

Preferably, the upper edge of the sealing valve 16 is provided with an outer ring, and the outer ring is provided with a first groove 161 which is opened downwards; the inner wall 122 is disposed within the first recess 161;

the sealing ring 15 is a cup-shaped structure, the opening direction is upward, and the bottom of the sealing ring 15 is provided with a central through hole;

the second pressing cap 14 is a cylindrical structure with a central through hole, and a second groove 141 with a downward opening direction and corresponding matching with the side wall of the sealing ring 15 is arranged on the second pressing cap 14; the side wall of the seal ring 15 is disposed in the second groove 141;

the upper edge of the sealing valve 16 is in close contact with the bottom of the sealing ring 15;

the first pressing cap 13 is of a cylindrical structure, the opening direction of the first pressing cap is downward, the first pressing cap is hollow, and a central through hole is formed in the center of the upper bottom surface of the first pressing cap 13.

Preferably, a supporting wall 123 is further installed on the top of the outer wall 121 of the salt feeding port 12, and the inner wall 122 of the first pressing cap 13 is connected with the supporting wall 123; the outer wall 121 of the second impaction cap 14 is in close contact with the inner wall 122 of the support wall 123; the bottom of the side wall of the first compression cap 13 is in close contact with the top of the outer wall 121; the bottom of the upper bottom surface of the first pressing cap 13 is in close contact with the top of the upper bottom surface of the second pressing cap 14.

Preferably, a limit groove 131 is formed in the side edge of the central through hole in the bottom surface of the first pressing cap 13; a limiting block 182 corresponding to the limiting groove is arranged on the funnel pipe 181 of the salt feeding funnel 18.

The using method of the salt throwing device comprises the following steps: firstly, a filter screen is sleeved on the salt feeding port 12, namely, the lower part of the filter screen extends into the tank body 17 of the washing tank, and the upper part of the filter screen is spread on the supporting wall 123, the outer wall 121 and the inner wall 122; then the sealing valve 16 is first mounted on the inner wall 122, at which time the upper surface of the mounted sealing valve 16 is flush with the top of the outer wall 121, and at which time a portion of the filter screen is in the first groove 161 between the sealing valve 16 and the inner wall 122 and in the gap between the sealing valve 16 and the outer wall 121; then, the sealing ring 15 and the second pressing cap 14 are sequentially placed on the sealing valve 16, at this time, the sealing ring 15 is embedded in the second pressing cap 14, the outer diameter of the second pressing cap 14 is the same as the basic inner diameter of the supporting wall 123, so that the second pressing cap 14 is embedded in the supporting wall 123, and at this time, a part of the filter screen is in a gap between the second pressing cap 14 and the supporting wall 123; finally, the first pressing cap 13 is installed, the first pressing cap 13 and the supporting wall 123 can be fixed through screw connection or other common detachable connection modes, at the moment, the bottom of the upper bottom surface of the first pressing cap 13 is tightly contacted with the top of the upper bottom surface of the second pressing cap 14, so that the second pressing cap 14 is pressed downwards, at the moment, a part of the filter screen is arranged in a gap between the supporting wall 123 and the first pressing cap 13 and on a contact surface between the first pressing cap 13 and the outer wall 121, and the other part of the filter screen is arranged outside the outer wall 121. In summary, the second impaction cap 14, the sealing ring 15, the sealing valve 16 and the filter screen (not shown in the figure) are fixed in the cavity between the first impaction cap 13, the outer wall 121, the inner wall 122 and the support wall 123 by the first impaction cap 13. The funnel pipe 181 of the salt feeding funnel 18 sequentially penetrates through the central through hole and the duckbill valve of the sealing valve 16, so that the salt feeding funnel 18 is arranged in the salt feeding device, waste salt in the salt feeding funnel 18 flows out of the funnel pipe 181 and then enters the filter screen, the waste salt in the filter screen is dissolved by water in the washing tank body 17, insoluble substances are left in the filter screen, and therefore the water flowing out of the filter screen washing tank body 17 almost has no or few insoluble substances, and the adsorption effect of the next process section is guaranteed.

A limit groove 131 is formed in the side edge of the central through hole in the bottom surface of the first pressing cap 13; the limiting block 182 corresponding to the limiting groove is arranged on the funnel pipe 181 of the salt feeding funnel 18, so that the salt feeding funnel 18 can be more stably fixed on the salt feeding device.

The filter screen can be made of thin materials such as a filter membrane and filter cloth, so that the installation of the salt throwing device cannot be influenced even if the filter screen is installed between the salt throwing port and the salt throwing device; when the insoluble impurities in the filter screen are too much and need to be cleaned, the filter screen of the rest salt throwing port is pressed first, then the salt throwing funnel 18, the first pressing cap 13, the second pressing cap 14, the sealing ring 15 and the sealing valve 16 are removed in sequence, the filter screen is taken out, the insoluble impurities can be recovered, and then the filter screen and the salt throwing device are installed on the salt throwing port according to the installation mode, so that the filter screen can be reused.

The water inlet of the water washing tank body 17 has no special position requirement and can be randomly arranged according to the use requirement.

The sealing ring 15 and the sealing valve 16 are both made of elastic rubber; after the salt is added, the salt feeding funnel 18 is directly drawn out, and at the moment, the duckbill valve at the lower part of the sealing valve 16 is automatically closed, so that the peculiar smell in the tank body 17 of the washing tank cannot float out, and the safety of a human body is protected.

Example 2

As shown in fig. 5, the salt separating treatment system for industrial waste salt according to the present invention includes a waste salt washing apparatus 1, an adsorption separation apparatus 2, a nanofiltration integrated apparatus 3, a reverse osmosis apparatus 4, a catalytic wet oxidation apparatus 5, a coagulation sedimentation apparatus 6, and a biochemical treatment apparatus 7;

the biochemical treatment device 7 comprises an anoxic tank 71 and a clean water tank 72;

the middle of the top of the waste salt washing device 1 is provided with a stirrer 11, a stirring rod 111 of the stirrer 11 extends into a tank cavity of the waste salt washing device 1, and the top of the waste salt washing device 1 is also provided with a salt feeding port 12. The waste salt is put into the waste salt washing device 1 through the salt adding port 12, mixed salt is dissolved in water through stirring of the stirring rod 111 for washing treatment, impurities insoluble in water are removed, and the mixed salt water dissolved in water is ready for treatment.

The water outlet of the waste salt water washing device 1 is communicated with the water inlet of the adsorption separation device 2 through a pipeline, the high-salt water dissolved in water enters the adsorption separation device 2 to be separated, the adsorption separation device 2 selects resin (namely mesoporous molecular sieve) with specific aperture, most organic matters are adsorbed and treated, the adsorbed organic matters are washed by alkali liquor, a filtrate conveying pipe 23 of the adsorption separation device 2 is communicated with the water inlet of the nanofiltration integration equipment 3, and an organic matter concentrated solution of the adsorption separation device 2 is communicated with the water inlet of the catalytic wet oxidation device 5 through a desorption liquid conveying pipe 25.

The waste brine washing device 1 adopts the waste brine washing device of the embodiment 1;

as shown in fig. 6, the adsorption separation apparatus 2 of the present invention includes an adsorption separation tank body 21, a water inlet pipe 22, a filtrate delivery pipe 23, an alkali liquor inlet pipe 24, a desorption liquid delivery pipe 25, a molecular sieve discharge pipe 32, and a dosing tank 31;

a filtrate conveying pipe 23 and an alkali liquor inlet pipe 24 are respectively arranged on two sides of the top of the adsorption separation tank body 21; the bottom of the adsorption separation tank body 21 is provided with a water inlet pipe 22 and a desorption liquid conveying pipe 25; a molecular sieve discharging pipe 32 is arranged on the side wall of the adsorption separation tank body 21; an upper filter plate 27 and a lower filter plate 28 are arranged in the adsorption separation tank body 21; a molecular sieve 29 is arranged between the upper filter plate 27 and the lower filter plate 28; the center of the top of the tank body 21 of the adsorption separation tank is also provided with a stirring device 26, and a stirring paddle of the stirring device 26 is also arranged between an upper filtering plate 27 and a lower filtering plate 28;

the dosing box 31 is provided with a medicine injection port 311; the dosing tank 31 is also provided with a dosing pump 30 communicated with the alkali liquor inlet pipe 24.

The water inlet pipe 22 is provided with an electric valve I221, the filtrate conveying pipe 23 is provided with an electric valve II 231, the alkali liquor inlet pipe 24 is provided with an electric valve III 241, the desorption conveying pipe 25 is provided with an electric valve IV 251, and the molecular sieve discharging pipe 32 is provided with a manual valve 321. And controlling the operation of the electric valve through the electric control cabinet.

The use method of the adsorption separation device comprises the following steps:

when the equipment normally operates:

controlling the first electric valve 221 and the second electric valve 231 to be in an open state, the third electric valve 241 and the fourth electric valve 251 to be in a closed state, and the manual valve to be in a closed state through the electric control cabinet;

the sewage flowing out of the water washing tank body 17 enters the adsorption separation tank body 21 from the water inlet pipe 22 through the electric valve I221, and when the sewage passes through the lower filter plate 28, fine suspended matters which are not dissolved in water can be further intercepted, so that the operation load of equipment is further reduced; the adsorption zone is filled with a mesoporous molecular sieve 29 to adsorb and remove pollutants in the sewage so as to achieve the aim of further purification; the upper filter plate 27 is used for intercepting the mesoporous molecular sieve in the adsorption zone, the mesoporous molecular sieve 29 (not shown in the figure) can not be lost, and the treated sewage is discharged after passing through the electric valve two 231 on the filtrate conveying pipe 23.

When the equipment is backwashed:

the opening states of an electric valve four 251 and an electric valve three 241 are controlled by an electric control cabinet, a dosing pump 30 and a stirring device 26 on a dosing tank 31 operate simultaneously, an electric valve one 221 and an electric valve two 231 are in a closed state, and a manual valve 321 is also in a closed state;

after adsorption of the mesoporous molecular sieve in the adsorption separation tank body 21 is completed, alkali liquor (30% sodium hydroxide solution) in the dosing tank is driven into the adsorption separation tank body 21 through the dosing pump 30, organic pollutants in the mesoporous molecular sieve are dissolved in the alkali liquor under the soaking of the liquid medicine, backwashing of the mesoporous molecular sieve is accelerated through stirring of the stirring device 26, the mesoporous molecular sieve is rapidly recovered and utilized, and desorption concentrated solution after backwashing is discharged through the electric valve four 251 on the desorption liquid conveying pipe 25.

The mesoporous molecular sieve in the adsorption separation tank body 21 can be emptied by opening the manual valve 321 on the molecular sieve discharging pipe 32, and the equipment is overhauled and maintained.

The nanofiltration integrated device 3 separates the filtrate of the adsorption separation device 2 again, only monovalent ions, divalent and above-divalent ions and organic matters pass through the nanofiltration integrated device 3 and are intercepted to remove the concentrated solution, the permeate flows into the reverse osmosis device 4, and the concentrated solution flows into the coagulating sedimentation device 6.

The reverse osmosis equipment 4 adopts a reverse osmosis form, and utilizes pressure to enable water molecule leachate to permeate the reverse osmosis membrane and intercept molecules larger than 1nm, thereby achieving the purpose of treating the leachate. The water coming from the reverse osmosis equipment 4 is the permeate formed in the nanofiltration integrated equipment 3, wherein the permeate contains a large amount of sodium chloride NaCl, the permeate is fully concentrated by the reverse osmosis equipment 4 and then is separated into clear water liquid and concentrated liquid, the clear water liquid reaching the recycling standard is conveyed into a clear water tank 72 of the biochemical treatment device 7 through a permeate conveying pipe to wait for recycling, and a large amount of NaCl contained in the concentrated liquid is output through a concentrated liquid conveying pipe 41 to be used as a raw material in the chlor-alkali industry.

In this embodiment, the catalytic wet oxidation apparatus 5 is a device for treating high-concentration organic wastewater by using a catalytic wet oxidation method, and the catalytic wet oxidation method (CWAO) is an advanced environmental protection technology for treating high-concentration organic wastewater that has been developed internationally in the mid eighties on the basis of the wet oxidation method, and specifically, organic matters and ammonia in wastewater are oxidized and decomposed into harmless substances such as carbon dioxide, water and nitrogen respectively by air and an oxidant under the action of a certain temperature, pressure and a catalyst, so as to achieve the purpose of purification. The concentrated solution containing a large amount of organic matters, which is concentrated by the adsorption separation device 2, flows into the catalytic wet oxidation device 5 to perform a CWAO catalytic oxidation reaction, so that most of the organic matters are removed, and the degradation liquid is conveyed to the anoxic tank 71 of the biochemical treatment device 7 for biochemical treatment through a degradation liquid conveying pipeline 51 at the liquid outlet end of the catalytic wet oxidation device 5.

The coagulating sedimentation device 6 comprises a sedimentation device 61, the liquid outlet end of the sedimentation device 61 is communicated with an anoxic tank 71 of the biochemical treatment device 7 through a supernatant liquid conveying pipeline 62, the water outlet end of the bottom of the sedimentation device 61 is connected with a sludge pump 63, the sludge pump 63 is communicated with a filter press 64 through a pipeline, and one side of the filter press 64 is connected with a sludge outward transportation device 65. The concentrated solution formed by the filtration of the nanofiltration integrated equipment 3 is subjected to coagulating sedimentation treatment in the coagulating sedimentation device 6 by adjusting the pH value and adding PAC (polyaluminium chloride) and PAM (polyacrylamide) coagulant, so that most of bivalent and trivalent ions in the concentrated solution are precipitated, and part of organic matters can be removed by precipitation. Supernatant and sludge are formed after the precipitation operation, the supernatant enters an anoxic tank 71 of the biochemical treatment device 7, the precipitated sludge is conveyed by a sludge pump 63 and is pumped into a filter press 64 for filter pressing, and dry sludge formed by filter pressing is transported by a sludge transporting device 65 for transporting

The biochemical treatment device 7 is also provided with an aerobic tank 73 and an MBR membrane tank 74 between the anoxic tank 71 and the clean water tank 72, the upper part of the anoxic tank 71 is provided with an anoxic tank water outlet communicated with the aerobic tank 73, and the upper part of the aerobic tank 73 is provided with an aerobic tank water outlet communicated with the MBR membrane tank 74. The bottom of the aerobic tank 73 is provided with a plurality of aerobic tank aeration heads 731, the bottom of the MBR membrane tank 74 is provided with a plurality of membrane tank aeration heads 741, and the aerobic tank aeration heads 731 and the membrane tank aeration heads 741 are communicated with an air blower 75 arranged outside the biochemical treatment device 7 through pipelines. The MBR Membrane tank 74 is provided with an MBR Membrane module 742, which is also called a Membrane bioreactor (Membrane Bio-Reactor), and is a novel water treatment technology unit combining a Membrane separation unit and a biological treatment unit, and the MBR Membrane module 742 can be an RGE 100/150 flat Membrane module produced by south beijing reijiert Membrane separation technologies ltd. The MBR membrane module 742 has a self-priming pump 743, the inlet end of the self-priming pump 743 is in communication with the outlet end of the MBR membrane module 742 via a pipeline, and the outlet end of the self-priming pump 743 is in communication with the clean water basin 72 via a pipeline. The bottom of the MBR membrane tank 74 is also provided with a lift pump 744, a return pipe 745 is connected to the lift pump 744, and the outflow end of the return pipe 745 is inserted into the anoxic tank 71.

In this embodiment, the incoming water of the anoxic tank 71 is the degradation liquid of the catalytic wet oxidation device 5 and the supernatant of the coagulation sedimentation device 6, and after the nitrification-denitrification treatment in the anoxic tank 71 and the aerobic tank 73, and the aeration treatment in the aerobic tank aeration head 731 and the membrane tank aeration head 741, most organic matters and ammonia nitrogen in the liquid are removed to form muddy water; and further muddy water enters the MBR membrane tank 74, the MBR membrane filters the muddy water into clear water through the self-priming pump 743 and conveys the clear water to the clear water tank 72 for reuse, and the activated sludge and microorganisms in the muddy water are left at the bottom of the MBR membrane tank 74, and the sludge-water mixture at the bottom of the MBR membrane tank 74 is conveyed by the lifting pump 744 and the return pipe 745 and flows back to the anoxic tank 71 for further denitrification treatment.

Referring to fig. 5, the waste salt from the coal chemical industry is fed into the waste salt washing apparatus 1 through the salt feeding port 12, the salt is dissolved in water by stirring with the stirrer 11 to be washed, insoluble impurities are removed, the mixed salt dissolved in water enters the adsorption separation apparatus 2 to be adsorbed and separated, the organic matter of the salt water is adsorbed, the salt water is backwashed with alkali solution after saturated adsorption, and the backwashed concentrated solution flows into the catalytic wet oxidation apparatus 5 to be subjected to CWAO catalytic oxidation reaction. Most organic matters in the concentrated solution are removed through CWAO catalytic oxidation reaction, and the degradation solution flows into a biochemical (A + O + MBR) treatment device 7. The filtrate of the adsorption separation device 2 flows into a nanofiltration integrated device 3, a permeate and a concentrate are formed after the nanofiltration operation of the nanofiltration integrated device 3, monovalent ions such as sodium ions and chloride ions permeate and flow into the permeate, the permeate enters a reverse osmosis device 4, divalent and more than divalent ions such as calcium ions and magnesium ions and organic matters are intercepted and removed from the concentrate, the concentrate enters a coagulating sedimentation device 6 for coagulating sedimentation operation, pH adjustment and PAC and PAM addition are carried out in the coagulating sedimentation device 6, most of the divalent and trivalent ions are precipitated, and part of the organic matters can also be precipitated and removed, the supernatant after precipitation enters a biochemical treatment device 7, the precipitated sludge is pumped into a filter press 64 through a sludge pump 63 for pressure filtration, and the dry sludge is transported out. The degradation liquid of the catalytic wet oxidation device 5 and the supernatant of the coagulating sedimentation device 6 enter an anoxic tank 71 of the biochemical treatment device 7, after nitrification-denitrification treatment in the anoxic tank 71 and the aerobic tank 73, most organic matters and ammonia nitrogen in the sewage water liquid are removed and formed into muddy water through aeration treatment of an aerobic tank aeration head 731 and a membrane tank aeration head 741, the clear water liquid formed by filtering the muddy water is conveyed to a clear water tank 72 to be reused, and the active sludge and microorganisms in the muddy water flow back to the anoxic tank 71 for further denitrification treatment. The water coming from the reverse osmosis equipment 4 is the permeate liquid formed in the nanofiltration integrated equipment 3, wherein the permeate liquid contains a large amount of sodium chloride NaCl, the clear water liquid formed by separating the permeate liquid after the water is fully concentrated by the reverse osmosis equipment 4 enters the clear water tank 72 of the biochemical treatment device 7 for waiting for recycling, and the concentrated liquid contains a large amount of NaCl which can be used as the raw material of the chlor-alkali process.

The nanofiltration integrated equipment 3, the reverse osmosis equipment 4, the catalytic wet oxidation device 5, the coagulating sedimentation device 6 and the biochemical treatment device 7 can be selected from the existing commercialized equipment.

In the description of the present invention, unless otherwise specified, the terms "upper", "lower", "left", "right", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

Finally, it should be noted that the above-mentioned technical solution is only one embodiment of the present invention, and it will be apparent to those skilled in the art that various modifications and variations can be easily made based on the principle disclosed in the present invention, and not limited to the structures described in the above-mentioned specific embodiments of the present invention, so that the foregoing description is only preferred, and not restrictive.

Claims

1. A salt treatment system that divides of industry waste salt which characterized in that:

the salt separation treatment system comprises a waste salt washing device (1), an adsorption separation device (2), a nanofiltration integrated device (3), a reverse osmosis device (4), a catalytic wet oxidation device (5), a coagulation precipitation device (6) and a biochemical treatment device (7);

the water outlet of the waste salt water washing device (1) is communicated with the water inlet of the adsorption separation device (2) through a pipeline, a filtrate conveying pipe (23) of the adsorption separation device (2) is communicated with the water inlet of the nanofiltration integration device (3), a desorption conveying pipe (25) of the adsorption separation device (2) is communicated with the water inlet of the catalytic wet oxidation device (5), a permeate conveying pipe of the nanofiltration integration device (3) is communicated with the water inlet of the reverse osmosis device (4), and a concentrated liquid conveying pipe of the nanofiltration integration device (3) is communicated with the water inlet of the coagulation precipitation device (6); the reverse osmosis equipment is connected with a concentrated solution conveying pipeline (41) and is used for outputting concentrated solution to be used as raw materials in the chlor-alkali industry;

the biochemical treatment device (7) comprises an anoxic tank (71) and a clean water tank (72), the liquid outlet end of the catalytic wet oxidation device (5) is communicated with the anoxic tank (71) of the biochemical treatment device (7) through a degradation liquid conveying pipeline (51), the coagulating sedimentation device (6) comprises a sedimentation device (61), the liquid outlet end of the sedimentation device (61) is communicated with the anoxic tank (71) of the biochemical treatment device (7) through a supernatant liquid conveying pipeline (62), and the permeate liquid conveying pipeline of the reverse osmosis device (4) is communicated with the clean water tank (72) of the biochemical treatment device (7); the biochemical treatment device (7) is also provided with an aerobic tank (73) and an MBR membrane tank (74) between the anoxic tank (71) and the clean water tank (72), the upper part of the anoxic tank (71) is provided with an anoxic tank water outlet communicated with the aerobic tank (73), and the upper part of the aerobic tank (73) is provided with an aerobic tank water outlet communicated with the MBR membrane tank (74).

2. The salt separating treatment system for industrial waste salt according to claim 1, wherein:

the waste salt water washing device (1) comprises a water washing tank body (17), a salt feeding port (12), a water outlet, a filter screen, a salt feeding device and a stirrer (11);

the top of the washing tank body is provided with a stirrer (11), a stirring rod (111) of the stirrer extends into a tank cavity of the washing tank body (17), the top of the washing tank body (17) is also provided with a salt throwing port (12), and a salt throwing device is arranged on the salt throwing port (12); the filter screen is arranged between the salt throwing device and the salt throwing port (12); and a water outlet is also formed in the upper part of the side wall of the water washing tank body.

3. The salt separating treatment system for industrial waste salt according to claim 2, wherein:

the salt throwing port (12) comprises an inner wall (122) and an outer wall (121), the inner wall (122) is arranged in the outer wall (121), a gap is formed between the inner wall (122) and the outer wall (121) at the upper part, and the lower parts are communicated; the upper edge of the inner wall (122) is lower than that of the outer wall (121);

the salt throwing device comprises a first pressing cap (13), a second pressing cap (14), a sealing ring (15), a sealing valve (16) and a salt throwing funnel (18); the first pressing cap (13) is connected with the outer wall (121) of the salt feeding port (12), and the second pressing cap (14), the sealing ring (15) and the sealing valve (16) are sequentially arranged in a cavity among the first pressing cap (13), the outer wall (121) and the inner wall (122) from top to bottom, so that the second pressing cap (14), the sealing ring (15) and the sealing valve (16) are pressed and fixed in the cavity by the first pressing cap (13);

the first pressing cap (13), the second pressing cap (14) and the sealing ring (15) are provided with coaxial central through holes (132); the upper part of the sealing valve (16) is provided with an opening, and the lower part is provided with a duckbill valve; and a funnel pipe (181) of the salt throwing funnel (18) sequentially penetrates through the central through hole and a duckbill valve of the sealing valve (16) to be arranged in the salt throwing device and is communicated with the inside of the water washing tank body (17).

4. The salt separating treatment system for industrial waste salt according to claim 3, wherein:

an outer ring is arranged on the upper edge of the sealing valve (16), and a first groove (161) with a downward opening is arranged on the outer ring; the inner wall (122) is disposed within the first groove (161);

the sealing ring (15) is of a cup-shaped structure, the opening direction is upward, and the bottom of the sealing ring (15) is provided with a central through hole;

the second pressing cap (14) is of a cylindrical structure with a central through hole, and a second groove (141) with a downward opening direction and matched with the side wall of the sealing ring (15) correspondingly is formed in the second pressing cap (14); the side wall of the sealing ring (15) is arranged in the second groove (141);

the upper edge of the sealing valve (16) is tightly contacted with the bottom of the sealing ring (15);

the first pressing cap (13) is of a barrel-shaped structure, the opening direction is downward, the interior of the first pressing cap is hollow, and a central through hole is formed in the center of the upper bottom surface of the first pressing cap (13).

5. The salt separating treatment system for industrial waste salt according to claim 4, wherein:

a supporting wall (123) is further mounted on the top of the outer wall (121) of the salt feeding port (12), and the inner wall (122) of the first pressing cap (13) is connected with the supporting wall (123); an outer wall (121) of the second pressing cap (14) is in close contact with an inner wall (122) of the support wall (123);

the bottom of the side wall of the first pressing cap (13) is in close contact with the top of the outer wall (121); the bottom of the upper bottom surface of the first pressing cap (13) is in close contact with the top of the upper bottom surface of the second pressing cap (14);

a limit groove (131) is formed in the side edge of the central through hole in the bottom surface of the first pressing cap (13); and a limiting block (182) corresponding to the limiting groove is arranged on a funnel pipe (181) of the salt feeding funnel (18).

6. The salt separating treatment system for industrial waste salt according to claim 1, wherein:

the adsorption separation device (2) comprises an adsorption separation tank body (21), a water inlet pipe (22), a filtrate conveying pipe (23), an alkali liquor inlet pipe (24), a desorption liquid conveying pipe (25), a molecular sieve discharging pipe (32) and a dosing tank (31);

a filtrate conveying pipe (23) and an alkali liquor inlet pipe (24) are respectively arranged on two sides of the top of the adsorption separation tank body (21); a water inlet pipe (22) and a desorption liquid conveying pipe (25) are arranged at the bottom of the adsorption separation tank body (21); a molecular sieve discharging pipe (32) is arranged on the side wall of the adsorption separation tank body (21); an upper filter plate (27) and a lower filter plate (28) are arranged in the adsorption separation tank body (21); a molecular sieve (29) is arranged between the upper filter plate (27) and the lower filter plate (28); the center of the top of the tank body (21) of the adsorption separation tank is also provided with a stirring device (26), and a stirring paddle of the stirring device (26) is also arranged between an upper filtering plate (27) and a lower filtering plate (28);

the dosing box (31) is provided with a medicine injection port (311); the dosing box (31) is also provided with a dosing pump (30) communicated with the alkali liquor inlet pipe (24).

7. The salt separating treatment system for industrial waste salt according to claim 1, wherein the sedimentation device (61) of the coagulating sedimentation device (6) is connected with a sludge pump (63) at the water outlet end of the bottom, the sludge pump (63) is communicated with a filter press (64) through a pipeline, and one side of the filter press (64) is connected with a sludge outward transportation device (65).

8. The salt separating treatment system of industrial waste salt according to claim 1, wherein a plurality of aeration heads (731) of the aerobic tank are arranged at the bottom of the aerobic tank (73), a plurality of aeration heads (741) of the membrane tank are arranged at the bottom of the MBR (74), and the aeration heads (731) and the aeration heads (741) of the aerobic tank are communicated with a blower (75) arranged outside the biochemical treatment device (7) through a pipeline.

9. The salt separating treatment system for industrial waste salt according to claim 1, wherein the MBR membrane module (742) is installed in the MBR membrane tank (74), the MBR membrane module (742) is provided with a self-priming pump (743), the inlet end of the self-priming pump (743) is communicated with the outlet end of the MBR membrane module (742) through a pipeline, and the outlet end of the self-priming pump (743) is communicated with the clean water tank (72) through a pipeline.

10. The salt separating treatment system of industrial waste salt according to claim 1, characterized in that a lift pump (744) is further installed at the bottom of the MBR membrane tank (74), a return pipe (745) is connected to the lift pump (744), and the outflow end of the return pipe (745) is inserted into the anoxic tank (71).