CN115193384A - Powder feeding and mixing system - Google Patents
Powder feeding and mixing system Download PDFInfo
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- CN115193384A CN115193384A CN202210933149.XA CN202210933149A CN115193384A CN 115193384 A CN115193384 A CN 115193384A CN 202210933149 A CN202210933149 A CN 202210933149A CN 115193384 A CN115193384 A CN 115193384A
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- 239000000463 material Substances 0.000 claims abstract description 43
- 239000002994 raw material Substances 0.000 claims abstract description 33
- 239000011265 semifinished product Substances 0.000 claims abstract description 6
- 238000001514 detection method Methods 0.000 claims description 31
- 230000005540 biological transmission Effects 0.000 claims description 25
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- 239000000047 product Substances 0.000 claims description 10
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- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/24—Stationary reactors without moving elements inside
- B01J19/2455—Stationary reactors without moving elements inside provoking a loop type movement of the reactants
- B01J19/2465—Stationary reactors without moving elements inside provoking a loop type movement of the reactants externally, i.e. the mixture leaving the vessel and subsequently re-entering it
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/50—Mixing liquids with solids
- B01F23/56—Mixing liquids with solids by introducing solids in liquids, e.g. dispersing or dissolving
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
- B01F25/40—Static mixers
- B01F25/42—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions
- B01F25/43—Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction
- B01F25/431—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor
- B01F25/4314—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor with helical baffles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
- B01F25/40—Static mixers
- B01F25/42—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions
- B01F25/43—Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction
- B01F25/431—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor
- B01F25/4314—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor with helical baffles
- B01F25/43141—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor with helical baffles composed of consecutive sections of helical formed elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/71—Feed mechanisms
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/71—Feed mechanisms
- B01F35/712—Feed mechanisms for feeding fluids
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/71—Feed mechanisms
- B01F35/717—Feed mechanisms characterised by the means for feeding the components to the mixer
- B01F35/7175—Feed mechanisms characterised by the means for feeding the components to the mixer using propellers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/0006—Controlling or regulating processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/0006—Controlling or regulating processes
- B01J19/0013—Controlling the temperature of the process
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/0053—Details of the reactor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/24—Stationary reactors without moving elements inside
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J4/00—Feed or outlet devices; Feed or outlet control devices
- B01J4/001—Feed or outlet devices as such, e.g. feeding tubes
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- Dispersion Chemistry (AREA)
- Accessories For Mixers (AREA)
Abstract
The invention relates to a powder feeding and mixing system which comprises a reaction kettle, a powder raw material tank and a mixing device, wherein the reaction kettle is provided with a material inlet and a tail gas outlet, and the bottom of the reaction kettle is provided with a circulating outlet and a semi-finished product outlet; the mixing device comprises a feeding section and a mixing section, the feeding section comprises a powder conveying part and a fluid conveying part, the powder conveying part is internally provided with a powder conveying device, a first end of the powder conveying part is communicated with a powder raw material tank through a material valve, a first end of the fluid conveying part is communicated with a circulating outlet of the reaction kettle through the fluid conveying device, second ends of the powder conveying part and the fluid conveying part are respectively communicated with a first end of the mixing section, and a second end of the mixing section is communicated with the reaction kettle; the part that is used for the stirring to mix in above-mentioned system is located outside reation kettle, does not receive the influence of reation kettle size, and easy maintenance can reduce and build and maintenance cost to can let powder and liquid mix gradually in stirring and circulation, avoid the powder to float in liquid level and nodule, avoid combustible gas to pile up, safer.
Description
Technical Field
The invention relates to the technical field of chemical production automation, in particular to a powder feeding and mixing system.
Background
Traditional solid-liquid mixing is generally through motor drive stirring rake stirring liquid and is suitable for miniature reation kettle to use than mixing, increase and the liquid capacity along with reation kettle increase, all there is huge examination to motor moment and stirring rake intensity, engineering cost and maintenance degree of difficulty also can greatly increased, often can produce a large amount of hydrogen in chemical industry pickling purification reaction in addition, inflammable or harmful gas such as chlorine, traditional artifical reinforced generally directly measure disposable input after the material volume, this kind of reinforced mode exists dry powder and can not fuse with liquid fast, easily float in the liquid surface, the powder is easy the granulation under the mixture of mixer, lead to inside powder can't influence purity and subsequent handling with liquid contact, and produce easily combustible gas when reinforced inhomogeneous and pile up easily, produce the explosion when reaching certain concentration very easily.
Disclosure of Invention
The invention aims to provide a powder feeding and mixing system, which aims to reduce the requirements of a large-capacity reaction kettle on the torque of a motor and the strength of a stirring paddle, reduce the engineering cost and the maintenance difficulty, realize uniform feeding, and avoid the problems that the product purity and the subsequent process are influenced by the easy granulation of powder and the combustible gas accumulation is easily caused due to one-time feeding.
In order to achieve the purpose, the invention provides the following technical scheme:
a powder feed mixing system comprising:
the part of the reaction kettle above the highest liquid level is provided with a material inlet and a tail gas outlet, and the bottom of the reaction kettle is provided with a circulating outlet and a finished product semi-finished product outlet;
a powder material tank;
the mixing device comprises a feeding section and a mixing section which are communicated with each other, the feeding section comprises a powder conveying part and a fluid conveying part, the powder conveying part is located above the fluid conveying part, the powder conveying part is internally provided with the powder conveying device, the first end of the powder conveying part is communicated with a powder raw material tank through a material valve, the first end of the fluid conveying part is communicated with a circulating outlet of the reaction kettle through the fluid conveying device, the second end of the powder conveying part and the second end of the fluid conveying part are respectively communicated with the first end of the mixing section, and the second end of the mixing section is communicated with the reaction kettle.
Optionally, the powder material tank is provided with a weighing device for weighing the weight of the powder material in the powder material tank, the weighing device is connected with a signal input end of a control system of the powder material feeding and mixing system, the material valve is connected with a signal output end of the control system, and the control system controls the material valve to be opened and closed according to a detection signal of the weighing device.
Optionally, the reaction kettle is provided with a temperature detection device for detecting the temperature in the reaction kettle and a pressure detection device for detecting the pressure in the reaction kettle, the temperature detection device and the pressure detection device are respectively connected with a signal input end of a control system of the powder feeding and mixing system, and the control system is used for controlling the powder conveying device and the fluid conveying device to stop when a detection value of the temperature detection device or the pressure detection device exceeds a preset value.
Optionally, the reaction kettle is further provided with a pressure relief valve.
Optionally, a liquid level switch is arranged in the reaction kettle, the liquid level switch is connected to the powder conveying device and the loop of the fluid conveying device, the liquid level switch disconnects the loop of the powder conveying device when the liquid level in the reaction kettle is higher than or equal to a high liquid level preset value, and the liquid level switch disconnects the loop of the fluid conveying device when the liquid level in the reaction kettle is lower than or equal to a low liquid level preset value.
Optionally, a check valve is arranged between the second end of the powder conveying part and the first end of the mixing section, and the check valve is used for conducting the second end of the powder conveying part and the first end of the mixing section in a one-way manner along the direction from the powder conveying part to the mixing section.
Optionally, the check valve comprises:
a valve capable of cooperating with the second end of the powder conveying portion to close the second end of the powder conveying portion;
the one end of vaulting pole rotationally set up in mixing arrangement's casing, the other end of vaulting pole with the valve is connected, the vaulting pole with set up the piece that resets between mixing arrangement's the casing, the piece that resets is used for making the valve keeps sealing the trend of powder conveying portion's second end.
Optionally, the powder conveying device comprises a conveying screw and a driving device for driving the conveying screw to rotate.
Optionally, the drive device comprises:
the impeller is rotatably arranged in the fluid conveying part and is opposite to the outlet of the fluid conveying device so as to rotate under the driving of the fluid output by the fluid conveying device;
the input end of the turning transmission mechanism is in transmission connection with the impeller, and the output end of the turning transmission mechanism is in transmission connection with the conveying screw.
Optionally, a plurality of helical blades are arranged at intervals in the mixing section along the material flow direction.
According to the technical scheme, the invention discloses a powder feeding and mixing system which comprises a reaction kettle, a powder raw material tank and a mixing device, wherein a part above the highest liquid level of the reaction kettle is provided with a material inlet and a tail gas outlet, and the bottom of the reaction kettle is provided with a circulating outlet and a finished product semi-finished product outlet; the powder material tank is used for containing powder materials, a vibration device can be arranged on the powder material tank to prevent powder materials from being accumulated and incapable of discharging, and a worker can also manually knock the powder material tank or manually dredge the powder material tank; the mixing device comprises a feeding section and a mixing section which are communicated with each other, the feeding section comprises a powder conveying part and a fluid conveying part, the powder conveying part is positioned above the fluid conveying part, a powder conveying device is arranged in the powder conveying part, the first end of the powder conveying part is communicated with a powder raw material tank through a material valve, the first end of the fluid conveying part is communicated with a circulating outlet of the reaction kettle through the fluid conveying device, the second end of the powder conveying part and the second end of the fluid conveying part are respectively communicated with the first end of the mixing section, the second end of the mixing section is communicated with the reaction kettle, and the contact part of the system and liquid is subjected to antiseptic treatment; when the device is used, powder raw materials are placed in a powder raw material tank, a fluid conveying device is started after sufficient liquid is injected into a reaction kettle, the fluid conveying device extracts the liquid from the reaction kettle and conveys the liquid to a mixing device, a material valve is opened, the powder raw materials fall into the powder conveying device through a material pipeline between the powder raw material tank and a powder conveying part under the action of gravity, the powder raw materials and the liquid meet and are mixed at a mixing section under the conveying of the powder conveying device, the liquid drives the powder to enter the mixing section for mixing, the powder raw materials flow into the reaction kettle after passing through the mixing section and are mixed with the liquid in the reaction kettle, so that the liquid in the reaction kettle can form a continuous circulating closed-loop system, and the continuous circulation can enable the incompletely mixed powder and the liquid to be fully mixed and react under the action of the fluid conveying device and the mixing section, it is thus clear that the part that is used for stirring and mixing in the powder reinforced mixing system that this application provided all is located reation kettle outside, do not receive the influence of liquid capacity and reation kettle size, also maintain easily when breaking down, thereby can reduce construction cost and maintenance cost, and this kind of mode of feeding gradually and circulation mixing lets the powder fully mix with liquid, solve the powder and float in the liquid level and influence the problem of reaction and granulation, avoid influencing product purity and subsequent handling, simultaneously because feed gradually, but not once feed in raw material, also can not produce a large amount of combustible gas and other dangers thing in the short time, have enough time to supply workman's reaction and processing, can stop feeding at any time when reation kettle superpressure, solve the problem from the source, ensure production safety.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of a powder feed mixing system according to an embodiment of the present invention;
fig. 2 is a schematic view of a part of the mixing device of the powder charging and mixing system according to the embodiment of the present invention.
Wherein:
1 is a reaction kettle; 101 is a material inlet; 102 is a tail gas outlet; 103 is a circulation outlet; 104 is a finished product semi-finished product outlet; 2 is a mixing device; 201 is a powder conveying part; 202 is a fluid delivery section; 203 is a mixing section; 3 is a material valve; 4 is a powder material tank; 5 is a fluid conveying device; 6 is a temperature detection device; 7 is a pressure detection device; 8 is a pressure release valve; 9 is a liquid level switch; 10 is a check valve; 1001 is a valve; 1002 is a brace rod; 11 is a conveying screw rod; 12 is a driving device; 1201 is an impeller; 1202 is a first bevel gear set; 1203 is a transmission rod; 1204 is a second bevel gear set; 13 is a helical blade.
Detailed Description
The core of the invention is to provide a powder feeding and mixing system, the structural design of which can reduce the requirements of a large-capacity reaction kettle on the torque of a motor and the strength of a stirring paddle, reduce the engineering cost and the maintenance difficulty, simultaneously realize uniform feeding, and avoid the problems that the product purity and the subsequent process are influenced by easy granulation of powder and combustible gas accumulation is easily caused by one-time feeding.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 and fig. 2, fig. 1 is a schematic structural diagram of a powder feeding and mixing system according to an embodiment of the present invention, and fig. 2 is a schematic partial structural diagram of a mixing device of the powder feeding and mixing system according to the embodiment of the present invention.
The embodiment of the invention discloses a powder feeding and mixing system which comprises a reaction kettle 1, a powder raw material tank 4 and a mixing device 2.
Wherein, the part above the highest liquid level of the reaction kettle 1 is provided with a material inlet 101 and a tail gas outlet 102, and the bottom of the reaction kettle 1 is provided with a circulating outlet 103 and a finished product semi-finished product outlet 104; the powder raw material tank 4 is used for containing powder raw materials, a vibration device can be arranged on the powder raw material tank to avoid powder accumulation and incapability of discharging, and a worker can also manually knock the powder raw material tank 4 or manually dredge the powder raw material tank; the mixing device 2 comprises a feeding section and a mixing section 203 which are communicated with each other, the feeding section comprises a powder conveying part 201 and a fluid conveying part 202, the powder conveying part 201 is located above the fluid conveying part 202, a powder conveying device is arranged in the powder conveying part 201 and is used for conveying powder from a first end to a second end of the powder conveying part 201, the first end of the powder conveying part 201 is communicated with a powder raw material tank 4 through a material valve 3, the first end of the fluid conveying part 202 is communicated with a circulation outlet 103 of the reaction kettle 1 through a fluid conveying device 5, the fluid conveying device 5 is used for extracting liquid from the reaction kettle 1 and conveying the liquid to the mixing device 2, in the case, the fluid conveying device 5 is a high-pressure mortar pump, in other embodiments, other devices can be adopted as the fluid conveying device 5, the limitation is not made, the second end of the powder conveying part 201 and the second end of the fluid conveying part 202 are respectively communicated with the first end of the mixing section 203, the second end of the mixing section 203 is communicated with the reaction kettle 1, and the parts in contact with the liquid in the system are all subjected to anti-corrosion treatment.
When the device is used, a powder raw material is placed into a powder raw material tank 4, a sufficient amount of liquid is injected into a reaction kettle 1, then a fluid conveying device 5 is started, the fluid conveying device 5 extracts the liquid from the reaction kettle 1 and conveys the liquid to a mixing device 2, a material valve 3 is opened, the powder raw material falls into the powder conveying device through a material pipeline between the powder raw material tank 4 and a powder conveying part 201 under the action of gravity, the powder raw material and the liquid meet and are fused at a mixing section 203 under the conveying of the powder conveying device, the liquid drives the powder to enter the mixing section 203 for mixing, the powder flows into the reaction kettle 1 after passing through the mixing section 203 and is converged with the liquid in the reaction kettle 1, and thus, the liquid in the reaction kettle 1 can form a continuous circulating closed-loop system, and continuous circulation can enable the incompletely mixed powder and liquid to be fully mixed and react under the action of the fluid conveying device 5 and the mixing section 203.
It can be seen that, the traditional mixing mode is to realize mixing by driving the stirring paddle to continuously stir in the reaction kettle 1 by the motor. The liquid-containing mixing can only be carried out at low speed, so that the condition of uneven stirring is easy to occur, and the stirring and mixing mode of the stirring paddle in the reaction kettle 1 is generally more suitable for the application of a small-sized reaction kettle 1, along with the increase of the reaction kettle 1 and the increase of the liquid capacity, the motor torque and the strength of the stirring paddle are greatly tested, and the engineering cost and the maintenance difficulty are greatly increased, so that compared with the prior art, the parts for stirring and mixing in the powder feeding and mixing system provided by the embodiment of the invention are all positioned outside the reaction kettle 1 and are not influenced by the liquid capacity and the size of the reaction kettle 1, the powder feeding and mixing system is easy to maintain when a fault occurs, so that the construction cost and the maintenance cost can be reduced, and the gradual feeding and circulating mixing mode can fully mix the powder with the liquid, the problem that the reaction and granulation are influenced by the powder floating on the liquid level is solved, the product purity and the subsequent processes are not influenced, meanwhile, a large amount of combustible gas and other hazardous substances can not be generated in a short time, so that the reaction and the treatment of workers can be carried out when the overpressure of the reaction kettle 1 is avoided, and the feeding can be carried out, so that the safe production source can be ensured at any time.
When powder is put into the powder raw material tank 4, the metered powder raw material can be manually put into the powder raw material tank 4, or a weighing device can be arranged in the powder raw material tank 4, so that automatic control feeding is realized, specifically, in the embodiment of the invention, the powder raw material tank 4 is provided with the weighing device for weighing the weight of the powder raw material in the powder raw material tank 4, the weighing device is connected with the signal input end of a control system of a powder feeding and mixing system, the material valve 3 is connected with the signal output end of the control system, the control system controls the material valve 3 to be opened and closed according to a detection signal of the weighing device, and the control system switches the material valve 3 to perform quantitative control on the powder according to a weight signal detected by the weighing device during operation.
Preferably, in the embodiment of the present invention, the reaction kettle 1 is provided with a temperature detection device 6 for detecting the temperature in the reaction kettle 1 and a pressure detection device 7 for detecting the pressure in the reaction kettle 1, the temperature detection device 6 and the pressure detection device 7 are respectively connected to the signal input end of the control system of the powder feeding and mixing system, and the control system is configured to stop the powder conveying device and the fluid conveying device 5 when the detection value of the temperature detection device 6 or the pressure detection device 7 exceeds a preset value, that is, when the temperature detection device 6 detects that the temperature in the reaction kettle 1 exceeds the preset value or the pressure detection device 7 detects that the pressure output in the reaction kettle 1 is preset, the supply of the powder and the circulation of the fluid can be closed, so as to avoid the generation of heat and gas by the continuous reaction, and improve the safety of the system.
Further optimizing the technical scheme, in order to prevent an accident, that is, the temperature detection device 6 and the pressure detection device 7 are disabled, in the embodiment of the present invention, the reaction kettle 1 is further provided with a pressure release valve 8, and when the pressure in the reaction kettle 1 exceeds a preset value, the pressure release valve 8 automatically releases the pressure, so as to ensure the safety of the reaction kettle 1 and prevent the accident.
Preferably, as shown in fig. 1, in the embodiment of the present invention, a liquid level switch 9 is disposed in the reaction kettle 1, the liquid level switch 9 is connected to the powder conveying device and the loop of the fluid conveying device 5, the liquid level switch 9 disconnects the loop of the powder conveying device when the liquid level in the reaction kettle 1 is higher than or equal to a high liquid level preset value, the liquid level switch 9 disconnects the loop of the fluid conveying device 5 when the liquid level in the reaction kettle 1 is lower than or equal to a low liquid level preset value, and the liquid level switch 9 can prevent the liquid level from being too high due to too much powder supply and can also avoid the problem of empty pumping of the fluid conveying device 5 due to too low liquid level.
As shown in fig. 2, a check valve 10 is disposed between the second end of the powder conveying part 201 and the first end of the mixing section 203, the check valve 10 is used for conducting the second end of the powder conveying part 201 and the first end of the mixing section 203 in a one-way manner along the direction from the powder conveying part 201 to the mixing section 203, in the working process, the powder is pushed by the powder conveying device to open the check valve 10 and meet and fuse with the liquid below, and when the powder conveying device stops conveying the powder, the check valve 10 can close the powder conveying device to prevent the liquid from flowing backwards.
Specifically, as shown in fig. 2, in an embodiment of the present invention, the check valve 10 includes a valve 1001 and a brace 1002, wherein the valve 1001 can cooperate with the second end of the powder conveying part 201 to close the second end of the powder conveying part 201; one end of the stay bar 1002 is rotatably disposed in the casing of the mixing device 2, the other end of the stay bar 1002 is connected to the valve 1001, a reset member is disposed between the stay bar 1002 and the casing of the mixing device 2, the reset member is used for enabling the valve 1001 to keep a tendency of closing the second end of the powder conveying portion 201, so that the second end of the powder conveying portion 201 is opened to communicate with the first end of the mixing section 203 only when the valve 1001 is driven by powder conveyed by the powder conveying device, and when the valve is not driven by powder conveyed by the powder conveying device, the stay bar 1002 enables the valve 1001 to close the second end of the powder conveying portion 201 under the action of the reset member, wherein the reset member includes, but is not limited to, a torsion spring, an extension spring, a compression spring, and the like.
Preferably, in the embodiment of the present invention, the powder conveying device includes a conveying screw 11 and a driving device 12 for driving the conveying screw 11 to rotate, and the driving device 12 may be a separately provided motor or may be integrated with the fluid conveying device 5, and the fluid conveying device 5 is used as a power source.
Specifically, in a specific embodiment of the present invention, the driving device 12 includes an impeller 1201 and a direction-changing transmission mechanism, wherein the impeller 1201 is rotatably disposed in the fluid conveying portion 202, and the impeller 1201 is opposite to the outlet of the fluid conveying device 5 to rotate under the driving of the fluid output by the fluid conveying device 5; the input end of the direction-changing transmission mechanism is in transmission connection with the impeller 1201, the output end of the direction-changing transmission mechanism is in transmission connection with the conveying screw 11, when the fluid conveying device 5 outputs fluid, the impeller 1201 rotates under the driving effect of the fluid, and then the conveying screw 11 above the impeller is driven by the direction-changing transmission mechanism to convey powder.
Further, as shown in fig. 2, the direction-changing transmission device includes a first bevel gear set 1202, a transmission rod 1203, and a second bevel gear set 1204, where the first bevel gear set 1202 includes a first driving bevel gear and a first driven bevel gear, the first driving bevel gear is engaged with the first driven bevel gear, the first driving bevel gear is coaxially and fixedly connected with the impeller 1201, the second bevel gear set 1204 includes a second driving bevel gear and a second driven bevel gear, the second driving bevel gear is engaged with the second driven bevel gear, the first driven bevel gear is coaxially and fixedly connected with the second driving bevel gear through the transmission rod 1203, so as to achieve power transmission between the first driven bevel gear and the second driving bevel gear, the second driven bevel gear is coaxially and fixedly connected with the transmission screw 11, when in application, the fluid output by the fluid transmission device 5 drives the impeller 1201 to rotate, the impeller 1201 drives the first driving bevel gear to rotate, the first driving bevel gear drives the first driven bevel gear to rotate, the first driven bevel gear drives the second driving bevel gear to rotate through the transmission rod 1203, the second driving bevel gear drives the second driven bevel gear to rotate, and further drive the transmission screw 11 to rotate to transmit the powder. It should be noted that the transmission ratio of the first bevel gear set 1202 and the second bevel gear set 1204 can be designed to ensure that the impeller 1201 is driven by the fluid to rotate the conveying screw 11.
Therefore, through the structure, the fluid conveying device 5 can be used as a power source of the powder conveying device while conveying fluid, other driving devices 12 do not need to be additionally designed for driving, the construction cost and the energy consumption of the system are reduced, automatic feeding can be achieved during mixing, manual operation is not needed, and the risk of manual operation is reduced.
Meanwhile, the mode of stirring liquid by a motor stirring paddle is adopted in transmission, the floating powder is easy to agglomerate, and the stirring needs larger torque, so that the motor power is generally larger, the energy consumption is also large, meanwhile, special requirements on the strength of the reaction kettle 1 exist, certain limitations exist, and the key application cost is high in the sealed reaction kettle 1. By adopting the pump type circulation in the scheme, the mixing effect is better, the power consumption is lower and the energy is more saved, the sealing performance of the reaction kettle 1 is not influenced, and the vibration is lower.
Preferably, as shown in fig. 2, in the embodiment of the present invention, a plurality of helical blades 13 are disposed at intervals in the mixing section 203 along the material flow direction, and this design can increase the impact on the liquid and the powder, so that the liquid and the powder are more fully mixed and reacted.
Furthermore, the mixing device 2 and the fluid conveying device 5 and the mixing device 2 and the reaction kettle 1 are connected through flange structures, so that the assembly and the maintenance are convenient.
To sum up, above-mentioned powder reinforced hybrid system can realize automatic feeding and mix, degree of automation is high, the security is high, reducible personnel intensity of labour, practice thrift the cost of labor, and can reduce the contact time of personnel and raw materials, the very insecurity factor of avoiding manual operation to exist, control system automatic control equipment operation, each detection device lasts the control, after the system normally operates, high production efficiency, the product quality is good, do not need personnel to control too much, can be by oneself continuous operation to handle, the production efficiency is greatly promoted, the security has been greatly improved, compare traditional reation kettle 1 interior stirring mixed mode simultaneously, this scheme has the characteristics such as difficult floating powder production granule, the installation of the external formula of cauldron also more does benefit to equipment fixing and maintenance, more be applicable to sealing pressure air vessel and large-scale reation kettle 1.
It should be noted that, in the present specification, the embodiments are all described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments may be referred to each other.
It should be understood that the use of "system," "apparatus," "unit" and/or "module" herein, if any, is merely one way to distinguish between different components, elements, parts, portions or assemblies of different levels. However, other words may be substituted by other expressions if they accomplish the same purpose.
As used in this application and in the claims, the terms "a," "an," "the," and/or "the" are not intended to be inclusive in the singular, but rather are intended to include the plural, unless the context clearly dictates otherwise. In general, the terms "comprises" and "comprising" merely indicate that steps and elements are included which are explicitly identified, that the steps and elements do not form an exclusive list, and that a method or apparatus may include other steps or elements. An element defined by the phrase "comprising one of \ 8230: \ 8230:" does not exclude the presence of additional identical elements in the process, method, article, or apparatus comprising the element.
In the description of the embodiments herein, "/" means "or" unless otherwise specified, for example, a/B may mean a or B; "and/or" herein is merely an association describing an associated object, and means that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, in the description of the embodiments of the present application, "a plurality" means two or more than two.
In the following, the terms "first", "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.
If used in this application, the flowcharts are intended to illustrate operations performed by the system according to embodiments of the present application. It should be understood that the preceding or following operations are not necessarily performed in the exact order in which they are performed. Rather, the various steps may be processed in reverse order or simultaneously. Meanwhile, other operations may be added to the processes, or a certain step or several steps of operations may be removed from the processes.
It is also noted that, in this document, terms such as "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that an article or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such article or apparatus. Without further limitation, an element defined by the phrase "comprising one of 8230, and" comprising 8230does not exclude the presence of additional like elements in an article or device comprising the same element.
The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the core concepts of the present invention. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (10)
1. A powder feeding and mixing system is characterized by comprising:
the part above the highest liquid level of the reaction kettle is provided with a material inlet and a tail gas outlet, and the bottom of the reaction kettle is provided with a circulating outlet and a finished product semi-finished product outlet;
a powder material tank;
the mixing device comprises a feeding section and a mixing section which are mutually communicated, the feeding section comprises a powder conveying part and a fluid conveying part, the powder conveying part is positioned above the fluid conveying part, the powder conveying part is internally provided with a powder conveying device, the first end of the powder conveying part is communicated with a powder raw material tank through a material valve, the first end of the fluid conveying part is communicated with a circulating outlet of the reaction kettle through the fluid conveying device, the second end of the powder conveying part and the second end of the fluid conveying part are respectively communicated with the first end of the mixing section, and the second end of the mixing section is communicated with the reaction kettle.
2. The powder feeding and mixing system of claim 1, wherein the powder material tank is provided with a weighing device for weighing the powder material in the powder material tank, the weighing device is connected with a signal input end of a control system of the powder feeding and mixing system, the material valve is connected with a signal output end of the control system, and the control system controls the material valve to be opened and closed according to a detection signal of the weighing device.
3. The powder feeding and mixing system of claim 1 or 2, wherein the reaction kettle is provided with a temperature detection device for detecting the temperature in the reaction kettle and a pressure detection device for detecting the pressure in the reaction kettle, the temperature detection device and the pressure detection device are respectively connected with the signal input end of a control system of the powder feeding and mixing system, and the control system is used for controlling the powder conveying device and the fluid conveying device to stop when the detection value of the temperature detection device or the pressure detection device exceeds a preset value.
4. The powder charging and mixing system of claim 3, wherein said reaction vessel is further provided with a pressure relief valve.
5. The powder feeding and mixing system of any one of claims 1, 2 and 4, wherein a liquid level switch is arranged in the reaction kettle, the liquid level switch is connected to the powder conveying device and the loop of the fluid conveying device, the liquid level switch is used for disconnecting the loop of the powder conveying device when the liquid level in the reaction kettle is higher than or equal to a high liquid level preset value, and the liquid level switch is used for disconnecting the loop of the fluid conveying device when the liquid level in the reaction kettle is lower than or equal to a low liquid level preset value.
6. The powder charging and mixing system of any one of claims 1, 2 and 4, wherein a check valve is disposed between the second end of the powder delivery portion and the first end of the mixing section, the check valve being configured to provide one-way communication between the second end of the powder delivery portion and the first end of the mixing section in a direction from the powder delivery portion to the mixing section.
7. The powder feed mixing system of claim 6, wherein the check valve comprises:
a valve capable of cooperating with the second end of the powder conveying portion to close the second end of the powder conveying portion;
the one end of vaulting pole rotationally set up in mixing arrangement's casing, the other end of vaulting pole with the valve is connected, the vaulting pole with set up the piece that resets between mixing arrangement's the casing, the piece that resets is used for making the valve keeps sealing the trend of powder conveying portion's second end.
8. The powder feed mixing system of any one of claims 1, 2, 4 and 7, wherein the powder conveying means comprises a conveyor screw and drive means for driving the conveyor screw in rotation.
9. The powder feed mixing system of claim 8, wherein the drive means comprises:
the impeller is rotatably arranged in the fluid conveying part and is opposite to the outlet of the fluid conveying device so as to rotate under the driving of the fluid output by the fluid conveying device;
the input end of the turning transmission mechanism is in transmission connection with the impeller, and the output end of the turning transmission mechanism is in transmission connection with the conveying screw.
10. The powder feed mixing system of any one of claims 1, 2, 4, 7 and 9, wherein a plurality of helical blades are spaced apart in the direction of material flow in the mixing section.
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| CN202210933149.XA CN115193384B (en) | 2022-08-04 | 2022-08-04 | Powder feeding and mixing system |
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| CN202210933149.XA CN115193384B (en) | 2022-08-04 | 2022-08-04 | Powder feeding and mixing system |
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| CN115193384B CN115193384B (en) | 2023-12-01 |
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| CN214020163U (en) * | 2020-11-27 | 2021-08-24 | 威海云山科技有限公司 | Solid-liquid mixing device |
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| CN201744314U (en) * | 2010-06-01 | 2011-02-16 | 常有 | Automatic emulsion proportioner driven by calm-pressing water |
| CN206746415U (en) * | 2017-05-13 | 2017-12-15 | 济宁牧易生物科技有限公司 | A kind of water-powder mixer |
| CN108786696A (en) * | 2018-06-06 | 2018-11-13 | 苏州睿烁环境科技有限公司 | A kind of plasticizer processing decoloring equipment |
| CN110961068A (en) * | 2019-12-25 | 2020-04-07 | 江苏常青树新材料科技有限公司 | Nontoxic apparatus for producing for phosphite |
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| CN115193384B (en) | 2023-12-01 |
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