Solid-liquid separation device for chemical industry

Abstract

The invention relates to a solid-liquid separation device in the field of chemical engineering, in particular to a solid-liquid separation device for chemical engineering, which comprises a support cylinder, a crushing mechanism, a pretreatment mechanism, a countercurrent spraying mechanism, a separation mechanism and a circulation mechanism. The top of the supporting cylinder communicates with a feeding pipeline, and a plurality of supporting frames and discharging pipes are arranged in the supporting cylinder. The crushing mechanism is arranged on the support frame, is communicated with the feeding pipeline and is used for crushing the waste denitration catalyst blocks; the pretreatment mechanism is arranged below the crushing mechanism and is used for treating the waste denitration catalyst blocks; the at least two groups of countercurrent spraying mechanisms are arranged on the supporting frame at intervals in the axis direction of the supporting barrel body, each countercurrent spraying mechanism comprises a spraying assembly and a screening assembly, and the screening assembly achieves solid-liquid separation through a vibration motor, a screening connecting plate, a screening baffle and a screening screen; the circulating mechanism is connected with the pretreatment mechanism. Efficient treatment and resource recovery of the waste denitration catalyst are achieved, the separation effect is remarkably improved, and the technological process is optimized.

Description

Technical Field

[0001] The present application relates to a solid-liquid separation device in the chemical industry, and in particular to a solid-liquid separation device for chemical industry. Background Art

[0002] In the chemical industry, solid-liquid separation technology, as a key tool for resource recovery and environmental protection, has experienced rapid development in recent years. With the continuous expansion of industrial production and increasingly stringent environmental protection requirements, the resource utilization of spent denitrification catalysts has gradually become a core issue of concern in the industry. Spent denitrification catalysts contain a wealth of valuable metals, such as vanadium, tungsten, and titanium, which are of great economic value and strategic significance. Therefore, how to efficiently recover these valuable metals from spent denitrification catalysts has become a key issue that needs to be addressed in the chemical industry.

[0003] In the prior art, for the recovery of spent denitrification catalysts, the spent denitrification catalysts are usually first crushed by a crushing device, and then the crushed spent denitrification catalysts are transferred to a soaking tank and added with a chemical treatment liquid. The spent denitrification catalysts react with the chemical treatment solvent to generate and precipitate metals, and then the metals are separated from the liquid through a filter screen. The types of metals are further separated, and different metals in the solid are separated. Then, chemical agents are added to the liquid to precipitate and precipitate other metals from the liquid.

[0004] Regarding the above-mentioned related technologies, firstly, the operation process in the separation process is extremely cumbersome. Secondly, after solid-liquid separation, different metals in the solid need to be classified. At the same time, when processing waste denitrification catalysts with complex components, it is difficult to achieve complete metal precipitation, resulting in some valuable metals remaining in the liquid phase. The resource utilization rate is low and multiple separations are required. Therefore, it is of great significance to develop an efficient, stable and simple solid-liquid separation device. Summary of the Invention

[0005] In order to solve the above problems, the present application provides a solid-liquid separation device for chemical industry.

[0006] The present application provides a solid-liquid separation device for chemical industry, which adopts the following technical solution: A solid-liquid separation device for chemical use comprises a feed pipe, a support cylinder, the top of the support cylinder is connected to the feed pipe, a plurality of support frames are arranged in the support cylinder, a discharge bin is arranged on one side of the support cylinder, and two groups of communication ports are arranged between the discharge bin and the support cylinder in a vertical direction; a crushing mechanism, the crushing mechanism is arranged on the support frame, the crushing mechanism is used to crush the waste denitration catalyst, the crushing mechanism includes a crushing feed pipe, and the crushing feed pipe is connected to the feed pipe; a pretreatment mechanism, the pretreatment mechanism is arranged on the support frame, the pretreatment mechanism is arranged below the crushing mechanism, and the pretreatment mechanism is used to treat the waste denitration catalyst crushed by the crushing mechanism; a countercurrent spray mechanism, at least two groups of the countercurrent spray mechanisms are arranged along the support cylinder The axial direction is arranged at intervals on the support frame, and the countercurrent spraying mechanism is used to separate solids from the solid-liquid mixture treated by the pretreatment mechanism. The countercurrent spraying mechanism is arranged below the pretreatment mechanism. The countercurrent spraying mechanism includes a spraying component and a screening component. The screening component includes a telescopic motor arranged on the support frame, the telescopic motor is vertically arranged, and the driving end of the telescopic motor is vertically upward. The driving end of the telescopic motor is provided with a screening connecting plate, and a screening baffle is provided on the screening connecting plate. The screening baffle passes through the connecting port, and a screening screen is provided on the screening connecting plate. The screening screen is arranged in the lower hopper, and the lower hopper is provided with a discharge port; a circulation mechanism, and the discharge end of the circulation mechanism is connected to the feed end of the pretreatment mechanism.

[0007] By adopting the above technical solution, the waste denitration catalyst first enters the crushing mechanism in the supporting cylinder through the feed pipe, and the crushing mechanism realizes efficient crushing treatment of the waste denitration catalyst. Subsequently, the crushed waste denitration catalyst particles fall into the pretreatment mechanism, and a chemical solvent is added to the pretreatment mechanism to soak the waste denitration catalyst particles to precipitate the metal in the catalyst. Then, the solid-liquid mixed solution of the waste denitration catalyst treated by the pretreatment mechanism continues to flow to the countercurrent spray mechanism. Then, the solid-liquid mixed solution containing the waste denitration catalyst passes through two groups of spray components in turn. The spray components and the screening components work together to separate the solid and liquid in the solid-liquid mixed solution containing the waste denitration catalyst. The separated metal slides to the discharge port through the screening screen and is discharged. A small amount of liquid flows out of the discharge bin, and most of the liquid flows into the circulation mechanism below. Then, the circulation mechanism redirects the liquid to the pretreatment mechanism after the metal liquid is precipitated, forming a closed loop, which not only improves resource utilization, but also significantly reduces wastewater discharge, and has good environmental performance. The entire device has a compact structure and is easy to operate, and can effectively improve the treatment efficiency and recovery value of waste denitrification catalysts.

[0008] Preferably, the spacings between adjacent support frames are the same, and a plurality of support frames are arranged on the inner wall of the support cylinder at intervals along the axial direction of the support cylinder.

[0009] By adopting the above technical solution, multiple support frames are evenly spaced along the axis of the support cylinder, providing an installation basis for other mechanisms and components.

[0010] Preferably, the screening connection plate is arranged at an inclination, and the side of the screening connection plate close to the screening screen is inclined downward, and the inclination angle of the screening screen is the same as the inclination angle of the screening connection plate.

[0011] By adopting the above technical solution, the screening connecting plate is tilted, which can effectively guide the flow of materials. At the same time, the screening screen and the screening connecting plate maintain the same tilt angle, which helps to improve the screening efficiency.

[0012] Preferably, the crushing mechanism includes a crushing support frame arranged on the support frame, a crushing bin is provided on the crushing support frame, a crushing feed pipe is provided at one end of the crushing bin pointing to the feed pipe, the crushing feed pipe is connected to the feed pipe, a conical guide surface is provided at the lower end of the crushing bin, a crushing discharge pipe is connected to the conical guide surface, a crushing valve is provided on the crushing discharge pipe, a crushing cylinder is provided on the inner wall of the crushing bin, a crushing rod is provided at the driving end of the crushing cylinder, the crushing rod points to the crushing discharge pipe, and a crushing assembly is provided on the crushing rod.

[0013] By adopting the above technical solution, the design of the pulverization mechanism significantly improves the processing efficiency and refinement of spent denitration catalyst. Specifically, by installing a pulverization cylinder-driven pulverization rod and its attached pulverization assembly within the pulverization chamber, efficient pulverization of spent denitration catalyst is achieved. The conical guide surface helps guide the material flow smoothly, reducing the risk of clogging in the pulverization discharge pipe, while the configuration of the pulverization valve facilitates precise control of the discharge process, thereby improving the overall operational stability and flexibility of the device.

[0014] Preferably, the pulverizing assembly includes a pulverizing block connected to the pulverizing rod, a plurality of stirring blades are evenly distributed on the outer edge of the pulverizing block, and a plurality of pulverizing protrusions are provided at one end of the pulverizing block pointing to the pulverizing discharge pipe.

[0015] By adopting the above technical solution, the stirring blades arranged on the outer edge of the crushing block can break up the waste denitrification catalyst during the crushing process, and the crushing protrusions at the end of the crushing block can further enhance the crushing effect of the waste denitrification catalyst, ensuring that the material particles are finer.

[0016] Preferably, the pretreatment mechanism includes a pretreatment bin arranged on the support frame, a pretreatment feed pipe is provided on the pretreatment bin, the pretreatment feed pipe is connected to the crushing discharge pipe, the lower end of the pretreatment bin is connected to a pretreatment discharge pipe, a pretreatment discharge valve is provided on the pretreatment discharge pipe, and a dosing component is provided on one side of the pretreatment bin.

[0017] By adopting the above technical solution, the pretreatment mechanism can chemically treat the crushed spent denitrification catalyst. Specifically, by setting up a pretreatment chamber and a dosing component, the amount of chemical agent added for metal precipitation can be precisely controlled, further precipitating the metal to be recovered from the spent denitrification catalyst.

[0018] Preferably, the dosing component includes a dosing bin arranged on one side of the pretreatment bin, the dosing bin is arranged on the support frame, the dosing bin is connected to a dosing pipe, the end of the dosing pipe away from the dosing bin is connected to the pretreatment bin, and a dosing pump is provided on the dosing pipe.

[0019] By adopting the above technical solution, the setting of the dosing bin facilitates the storage and supply of chemicals, the connection of the dosing pipe enables the delivery of chemicals to the pretreatment bin, and the addition of the dosing pump can control the flow rate of the chemicals.

[0020] Preferably, the spray assembly includes a guide member arranged on the discharge pipe of the pretreatment mechanism, and also includes a spray gun arranged on the support frame, the guide member is arranged between the spray gun and the screening connecting plate, the spray end of the spray gun is provided with a spray guide block, and the spray guide block is provided with a plurality of spray ports, and the spray ports point to the screening connecting plate.

[0021] By adopting the above technical solution, the setting of the guide part can make the solid-liquid mixture of the waste denitrification catalyst form the shape of a water film, and the spray assembly can spray out chemical agents. On the one hand, it can blow the solid phase metal in the solid-liquid mixture of the waste denitrification catalyst onto the screening plate of the screening assembly to achieve solid-liquid separation of the solid-liquid mixture of the waste denitrification catalyst. On the other hand, it can make the chemical agents evenly mixed on the water curtain, preparing for the work of the subsequent circulation mechanism.

[0022] Preferably, the circulation mechanism includes a receiving hopper arranged on the support frame, a filter screen plate is connected to the feed port of the receiving hopper, a first circulation connecting pipe is provided on the receiving hopper, a circulation first connecting pipe is connected to a circulation sedimentation bin below the first circulation connecting pipe, an extraction component is provided on one side of the circulation sedimentation bin, a circulation discharge pipe is connected to the circulation sedimentation bin, a first circulation valve is provided on the circulation discharge pipe, a circulation water outlet pipe is connected to the circulation sedimentation bin, a second circulation valve is provided on the circulation water outlet pipe, a circulation pump is provided on the circulation water outlet pipe, and the circulation water outlet pipe is connected to the pretreatment mechanism.

[0023] By adopting this technical solution, the circulation mechanism can recover and reuse the waste liquid after solid-liquid separation. Specifically, the collection hopper collects the separated waste liquid and directs it through the first circulating connecting pipe to the circulating sedimentation tank, where it undergoes sedimentation treatment, effectively removing impurities. The settled liquid can then be transported back to the pretreatment mechanism via the circulating outlet pipe and circulating pump, reducing resource waste.

[0024] Preferably, the extraction component includes an extraction tank arranged on one side of the circulation sedimentation tank, the extraction tank is arranged in the support cylinder, the extraction tank is connected to an extraction pipe, the end of the extraction pipe away from the extraction tank is connected to the circulation sedimentation tank, and the extraction pipe is provided with an extraction pump.

[0025] By adopting the above technical solution, the setting of the extraction component can realize the precise dosing treatment of the waste denitrification catalyst in the pretreatment bin, and the addition of chemical agents in the sedimentation bin can make the chemical agents react with the liquid phase material in the sedimentation bin, so as to further precipitate the impurities in the liquid phase material.

[0026] In summary, this application includes at least one of the following beneficial technical effects: The coordinated use of the crushing mechanism and the pretreatment mechanism can fully crush the waste denitration catalyst and carry out chemical treatment, so that the waste denitration catalyst can better react with the chemical agent, thereby effectively improving the solid-liquid separation effect, thereby significantly improving the comprehensive utilization rate of resources; The countercurrent spray mechanism uses a telescopic motor to drive the screening assembly, effectively separating the solids and liquids in the spent denitrification catalyst solution. The tilted screening connection plate guides the material flow in an orderly manner, preventing it from remaining on the screening plate and further optimizing the separation effect. The setting of the circulation mechanism can not only realize the recycling and reuse of chemical agents in the separation process, but also prevent the incomplete absorption of metals caused by insufficient reaction between the waste catalyst and the chemical agents. The setting of the circulation mechanism can further improve the metal recovery rate and reduce the waste of resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural diagram of an embodiment of the present application; Figure 2 is a cross-sectional schematic diagram of an embodiment of the present application; Figure 3 This application Figure 2 A magnified view of point A; Figure 4 is a cross-sectional schematic diagram from another perspective of an embodiment of the present application; Figure 5 It is a partial schematic diagram of the spray assembly of an embodiment of the present application.

[0028] Explanation of the accompanying symbols: 1. Feed pipe; 2. Support cylinder; 201. Support frame; 202. Discharge bin; 203. Discharge port; 204. Communication port; 3. Crushing mechanism; 301. Crushing support frame; 302. Crushing bin; 303. Crushing feed pipe; 304. Conical guide surface; 305. Crushing discharge pipe; 306. Crushing valve; 307. Crushing cylinder; 308. Crushing rod; 309. Crushing assembly; 3091. Crushing block; 3092. Mixing blade; 3093. Crushing protrusion; 4. Pretreatment mechanism; 401. Pretreatment bin; 402. Pretreatment feed pipe; 403. Pretreatment discharge pipe; 404. Pretreatment discharge valve; 405. Dosing assembly; 4051. Dosing bin; 4052. Dosing pipe ; 4053, dosing pump; 5, countercurrent spray mechanism; 501, spray assembly; 5011, guide; 5012, spray gun; 5013, spray guide block; 5014, spray port; 502, screening assembly; 5021, telescopic motor; 5022, screening connecting plate; 5023, screening baffle; 5024, screening screen; 6, circulation mechanism; 601, collecting hopper; 602, filter screen; 603, first circulating connecting pipe; 604, circulating sedimentation bin; 605, extraction assembly; 6051, extraction bin; 6052, extraction pipe; 6053, extraction pump; 606, circulating discharge pipe; 607, first circulating valve; 608, circulating water outlet pipe; 609, second circulating valve; 610, circulating pump. DETAILED DESCRIPTION

[0029] The following is combined with Figure 1-5 This application is described in further detail.

[0030] refer to Figure 1 as well as Figure 2The solid-liquid separation device for chemical use provided in the embodiment of the present application includes a supporting cylinder 2, a crushing mechanism 3, a pretreatment mechanism 4, a countercurrent spraying mechanism 5 and a circulation mechanism 6. Among them, the top of the support cylinder 2 is connected to the feed pipe 1, and several support frames 201 are arranged in the support cylinder 2. A discharge bin 202 is arranged on one side of the support cylinder 2, and a discharge port 203 is arranged on the discharge bin 202; the crushing mechanism 3 is arranged on the support frame 201, and the feed end of the crushing mechanism 3 is connected to the feed pipe 1, which is used to crush the waste denitrification catalyst; the pretreatment mechanism 4 is arranged below the crushing mechanism 3, and its feed end is connected to the discharge end of the crushing mechanism 3. The pretreatment mechanism 4 is used to chemically treat the waste denitrification catalyst and dissolve the waste denitrification catalyst in the chemical agent. The countercurrent spraying mechanism 5 is arranged in two groups at intervals along the axial direction of the support cylinder 2, and is respectively arranged on two adjacent groups of support frames 201. The countercurrent spraying mechanism 5 is used to perform solid-liquid separation on the solid-liquid mixed solution containing the waste denitrification catalyst. The discharge end of the circulation mechanism 6 is connected to the feed end of the pretreatment mechanism 4, thereby realizing the recycling of the chemical agent.

[0031] refer to Figure 2 as well as Figure 3 Specifically, the support cylinder 2 serves as the main structure of the entire device, and a number of support frames 201 are evenly arranged on its inner wall in the vertical direction. The adjacent support frames 201 have the same spacing, and the support frames 201 provide a stable installation foundation for each functional component.

[0032] refer to Figure 2 、 Figure 3 as well as Figure 4 The crushing mechanism 3 is a key component for achieving preliminary treatment of waste denitration catalysts. Specifically, the crushing mechanism 3 includes a crushing support frame 301, a crushing bin 302, a crushing feed pipe 303, a conical guide surface 304, a crushing discharge pipe 305, a crushing valve 306, a crushing cylinder 307, and a crushing assembly 309. The crushing support frame 301 is installed on the support frame 201 to provide support for the crushing bin 302. A crushing feed pipe 303 is provided at one end of the crushing bin 302 pointing to the feed pipe 1, which is used to receive the waste denitration catalyst transported from the feed pipe 1. A conical guide surface 304 is provided at one end of the crushing bin 302 pointing to the countercurrent spraying mechanism 5, which helps the material to smoothly enter the subsequent processing link. A crushing discharge pipe 305 is provided below the crushing bin 302, and a crushing valve 306 is provided on the crushing discharge pipe 305 to control the outflow of materials. A crushing cylinder 307 is provided on the top surface of the inner wall of the crushing bin 302 , and a crushing rod 308 is provided at the driving end of the crushing cylinder 307 . The crushing rod 308 points to the crushing discharge pipe 305 , and a crushing assembly 309 is provided on the crushing rod 308 .

[0033] The crushing assembly 309 includes a crushing block 3091 connected to the crushing rod 308. The crushing block 3091 includes a cylindrical part on the upper side and a conical part on the lower side. The cone can fit the conical guide surface 304. A number of stirring blades 3092 are evenly distributed on the outer edge of the cylindrical part of the crushing block 3091. The stirring blades 3092 can effectively promote the uniform mixing and crushing of the materials. And due to the special shape of the blades, when the stirring blades 3092 move back and forth, the waste denitrification catalyst in the crushing bin 302 can be stirred to improve the crushing effect. A number of crushing protrusions 3093 are provided at one end of the crushing block 3091 pointing to the crushing discharge pipe 305. Through the impact of the crushing protrusions 3093, the waste denitrification catalyst can be efficiently crushed into small particles.

[0034] During operation, the crushing cylinder 307 drives the crushing rod 308 to move up and down, thereby driving the crushing block 3091 to move repeatedly in the vertical direction, repeatedly impacting and grinding the waste denitration catalyst until the waste denitration catalyst is crushed into the required particle size.

[0035] refer to Figure 2 The pretreatment mechanism 4 is used to perform chemical pretreatment on the crushed waste denitration catalyst to dissolve the waste denitration catalyst into chemical reagents, thereby precipitating valuable metals in the waste denitration catalyst.

[0036] The pretreatment mechanism 4 includes a pretreatment bin 401, a pretreatment feed pipe 402, a pretreatment discharge pipe 403, a pretreatment discharge valve 404 and a dosing component 405. As an embodiment, the chemical agent is sulfuric acid. The pretreatment mechanism 4 can pickle the waste denitration catalyst in the pretreatment bin 401. After pickling, the waste denitration catalyst is dissolved in the solvent, and some metal particles therein are precipitated to form a solid-liquid mixed solution containing the waste denitration catalyst.

[0037] Pretreatment bin 401 is mounted on support frame 201 and is equipped with a pretreatment feed pipe 402, which is connected to crushing discharge pipe 305 and receives crushed spent denitration catalyst. Below pretreatment bin 401 is a pretreatment discharge pipe 403, which is equipped with a pretreatment discharge valve 404 to control the outflow of pretreated material.

[0038] A dosing assembly 405 is installed on one side of the pretreatment chamber 401. This assembly includes a dosing chamber 4051, a dosing pipe 4052, and a dosing pump 4053. The dosing chamber 4051 is mounted on the support frame 201. The dosing pipe 4052 is connected to the chamber 4051 at one end, which is connected to the pretreatment chamber 401. The dosing pump 4053 precisely injects pretreatment chemicals into the chamber 401, where they mix thoroughly with the spent denitration catalyst and react to produce solids such as TiO2, SiO2, Al2O3, and CaO. During operation, the dosing pump 4053 injects a fixed amount of pretreatment chemicals into the chamber 401, ensuring thorough mixing of the pretreatment chemicals with the spent denitration catalyst.

[0039] The countercurrent spray mechanism 5 is the core component for achieving solid-liquid separation. The countercurrent spray mechanism 5 includes a spray assembly 501 and a screening assembly 502. The spray assembly 501 includes a guide member 5011 arranged on the pretreatment feed pipe 402. The guide member 5011 is strip-shaped and can divert the liquid into a water curtain. It also includes a spray gun 5012 arranged on the support frame 201. The spray end of the spray gun 5012 is provided with a spray guide block 5013. The spray guide block 5013 is provided with a plurality of spray ports 5014. The spray ports 5014 point to the screening connecting plate 5022. The spray guide block 5013 can divide the water flow into a plurality of water columns, thereby spraying the water curtain formed by the solid-liquid mixture. The spray gun 5012 flushes the solid-liquid mixed liquid formed by the waste denitrification catalyst through a high-pressure water flow.

[0040] The spray stream from the spray gun 5012 hits the water curtain, impacting the downward-flowing water curtain. The momentum of the high-speed water flow is converted into thrust on the liquid and solid particles in the water curtain. For solid particles in the water curtain, this momentum transfer directly acts on the particle surface, giving them additional kinetic energy, thereby changing their trajectory and causing them to escape from the water curtain. Due to the unbalanced force, the solid particles are pushed toward the screening connecting plate 5022 by the water flow, while the liquid phase continues to flow along the main flow direction of the water curtain, thus achieving solid-liquid phase separation. Light impurities and light metal particles such as CaO and SiO2 are washed onto the screening assembly 502 by the water flow, while heavy metal particles such as TiO2 sink to the lower layer, where they are flushed out by the spray gun 5012 with greater hydraulic force.

[0041] The screening assembly 502 includes a telescopic motor 5021, a screening connection plate 5022, a screening baffle 5023, and a screening screen 5024, which are arranged on the support frame 201. The telescopic motor 5021 is arranged vertically, with the driving end of the telescopic motor 5021 pointing vertically upward. The driving end of the telescopic motor 5021 is provided with a screening connection plate 5022, the outer periphery of which is provided with a screening baffle 5023, and the screening screen 5024 is provided on the screening connection plate 5022. The screening screen 5024 is arranged in the lower hopper 202, and the discharge port 203 is provided on one side of the screening screen 5024.

[0042] The screening connecting plate 5022 is tilted, and the screening screen 5024 is tilted. The side of the screening connecting plate 5022 close to the screening screen 5024 is tilted downward. The tilt angle of the screening screen 5024 is the same as the tilt angle of the screening connecting plate 5022. This design allows the solid phase material to slide smoothly to the discharge port 203 as the telescopic motor 5021 works during the screening process. The screening connecting plates 5022 correspond to the communication ports 204 one by one, and each group of screening connecting plates 5022 passes through the corresponding The corresponding connecting port 204, when working, the spray gun 5012 sprays high-pressure water flow to perform countercurrent screening on the pre-treated waste denitrification catalyst, and the solid phase material falls on the screening connecting plate 5022. Further, with the operation of the telescopic motor 5021, the screening connecting plate 5022 produces a vertical reciprocating motion, and then the solid phase material slides along the screening connecting plate 5022 to the discharge port 203, and the part of the liquid phase adhered to the solid phase flows into the lower hopper 202 through the gap of the screening screen 5024, and finally flows out.

[0043] refer to Figure 4 The circulation mechanism 6 is used to achieve material recycling and improve resource recovery. The circulation mechanism 6 includes a hopper 601 provided on the support frame 201, and a filter screen 602 connected to the feed port of the hopper 601. The remaining small amount of solid phase that is not flushed out remains on the filter screen 602 and can be manually fed back into the feed pipe 1 later.

[0044] The circulation mechanism 6 also includes a first circulation connecting pipe 603, a circulation sedimentation tank 604, an extraction assembly 605, a circulation discharge pipe 606, a first circulation valve 607, a circulation outlet pipe 608, a second circulation valve 609, and a circulation pump 610. A hopper 601 is mounted on the support frame 201 and is used to collect the liquid phase after solid-liquid separation. The first circulation connecting pipe 603 is connected below the hopper 601, and the circulation sedimentation tank 604 is connected to the first circulation connecting pipe 603. An extraction assembly 605 is mounted on one side of the circulation sedimentation tank 604.

[0045] The extraction assembly 605 includes an extraction chamber 6051, an extraction pipe 6052, and an extraction pump 6053, which are arranged on one side of the circulating sedimentation chamber 604. The circulating sedimentation chamber 604 is provided with a circulating discharge pipe 606, which is provided with a first circulating valve 607. The circulating sedimentation chamber 604 is provided with a circulating water outlet pipe 608, which is provided with a second circulating valve 609. The second circulating water outlet pipe 608 is provided with a circulating pump 610. The circulating water outlet pipe 608 is connected to the pretreatment chamber 401. The circulation mechanism 6 can realize the recovery and reuse of waste liquid after solid-liquid separation. Specifically, the receiving hopper 601 collects the separated waste liquid and introduces it into the circulating sedimentation chamber 604 through the circulating first connecting pipe 603. The waste liquid is precipitated in the circulating sedimentation chamber 604 to effectively remove impurities. The liquid after precipitation can be re-transported to the pretreatment mechanism 4 through the circulating water outlet pipe 608 and the circulating pump 610, reducing resource waste.

[0046] The solid-liquid separation device for chemical use in this embodiment of the present application operates as follows: A pulverizing mechanism 3 pulverizes spent denitration catalyst into small particles. After chemical pretreatment by a pretreatment mechanism 4, a countercurrent spraying mechanism 5 achieves solid-liquid separation. A circulation mechanism 6 then separates valuable metals such as vanadium and tungsten. Finally, the recycling mechanism 6 recycles the material. The entire device has a simple structure and is easy to operate. It significantly improves the resource utilization of spent denitration catalyst, reduces resource waste, and meets the practical needs of the chemical industry.

[0047] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A solid-liquid separation device for chemical industry, comprising: Feed pipe (1), A support cylinder (2), the top of the support cylinder (2) is connected to a feed pipe (1), a plurality of support frames (201) are provided in the support cylinder (2), a lower material bin (202) is provided on one side of the support cylinder (2), and two groups of communication ports (204) are provided between the lower material bin (202) and the support cylinder (2) in a vertical direction; A pulverizing mechanism (3), the pulverizing mechanism (3) being arranged on the support frame (201), the pulverizing mechanism (3) being used for pulverizing the waste denitration catalyst, the pulverizing mechanism (3) comprising a pulverizing feed pipe (303), the pulverizing feed pipe (303) being connected to the feed pipe (1); A pretreatment mechanism (4), the pretreatment mechanism (4) being arranged on the support frame (201), the pretreatment mechanism (4) being arranged below the pulverization mechanism (3), and the pretreatment mechanism (4) being used to chemically treat the waste denitration catalyst pulverized by the pulverization mechanism (3); A countercurrent spray mechanism (5), at least two groups of the countercurrent spray mechanisms (5) are arranged on the support frame (201) at intervals along the axial direction of the support cylinder (2), the countercurrent spray mechanism (5) is used to separate solids from the solid-liquid mixture treated by the pretreatment mechanism (4), the countercurrent spray mechanism (5) is arranged below the pretreatment mechanism (4), the countercurrent spray mechanism (5) includes a spray component (501) and a screening component (502), the screening component (502) includes a telescopic motor (5021) arranged on the support frame (201), the telescopic motor (5021) is arranged vertically, and the telescopic motor (5021) is arranged vertically. The driving end of the machine (5021) is vertically upward, the driving end of the telescopic motor (5021) is provided with a screening connecting plate (5022), the screening connecting plate (5022) is provided with a screening baffle (5023), the screening connecting plate (5022) passes through the connecting port (204), the screening connecting plate (5022) is provided with a screening screen (5024), the screening screen (5024) is arranged in the lower bin (202), and the lower bin (202) is provided with a discharge port (203); a circulation mechanism (6), the discharge end of the circulation mechanism (6) is connected to the feed end of the pretreatment mechanism (4).

2. A solid-liquid separation device for chemical industry according to claim 1, characterized in that: The spacing between adjacent support frames (201) is the same, and a plurality of support frames (201) are arranged on the inner wall of the support cylinder (2) at intervals along the axial direction of the support cylinder (2).

3. A solid-liquid separation device for chemical industry according to claim 1, characterized in that: The screening connection plate (5022) is tilted, and the side of the screening connection plate (5022) close to the screening screen (5024) is tilted downward, and the tilt angle of the screening screen (5024) is the same as the tilt angle of the screening connection plate (5022).

4. A solid-liquid separation device for chemical industry according to claim 1, characterized in that: The pulverizing mechanism (3) comprises a pulverizing support frame (301) arranged on the support frame (201), a pulverizing bin (302) being arranged on the pulverizing support frame (301), a conical guide surface (304) being arranged at the lower end of the pulverizing bin (302), a pulverizing discharge pipe (305) being connected to the conical guide surface (304), a pulverizing valve (306) being arranged on the pulverizing discharge pipe (305), a pulverizing cylinder (307) being arranged on the inner wall of the pulverizing bin (302), a pulverizing rod (308) being arranged at the driving end of the pulverizing cylinder (307), the pulverizing rod (308) being pointed toward the pulverizing discharge pipe (305), and a pulverizing assembly (309) being arranged on the pulverizing rod (308).

5. A solid-liquid separation device for chemical industry according to claim 4, characterized in that: The crushing assembly (309) includes a crushing block (3091) connected to the crushing rod (308), a plurality of stirring blades (3092) are evenly distributed on the outer edge of the crushing block (3091), and a plurality of crushing protrusions (3093) are provided on the side of the crushing block (3091) pointing to the crushing discharge pipe (305).

6. A solid-liquid separation device for chemical industry according to claim 5, characterized in that: The pretreatment mechanism (4) comprises a pretreatment bin (401) arranged on the support frame (201), a pretreatment feed pipe (402) being provided on the pretreatment bin (401), the pretreatment feed pipe (402) being connected to the crushing discharge pipe (305), a pretreatment discharge pipe (403) being provided at the lower end of the pretreatment bin (401), a pretreatment discharge valve (404) being provided on the pretreatment discharge pipe (403), and a dosing assembly (405) being provided on one side of the pretreatment bin (401).

7. A solid-liquid separation device for chemical industry according to claim 6, characterized in that: The dosing component (405) includes a dosing chamber (4051) arranged on one side of the pretreatment chamber (401), the dosing chamber (4051) is arranged on the support frame (201), the dosing chamber (4051) is connected to a dosing pipe (4052), the end of the dosing pipe (4052) away from the dosing chamber (4051) is connected to the pretreatment chamber (401), and a dosing pump (4053) is arranged on the dosing pipe (4052).

8. A solid-liquid separation device for chemical industry according to claim 1, characterized in that: The spray assembly (501) includes a guide member (5011) arranged on the discharge end of the pretreatment mechanism (4), and also includes a spray gun (5012) arranged on the support frame (201), the guide member (5011) is arranged between the spray gun (5012) and the screening connection plate (5022), the spray end of the spray gun (5012) is provided with a spray guide block (5013), and the spray guide block (5013) is provided with a plurality of spray ports (5014), and the spray ports (5014) point to the screening connection plate (5022).

9. A solid-liquid separation device for chemical industry according to claim 1, characterized in that: The circulation mechanism (6) comprises a receiving hopper (601) arranged on the support frame (201), a filter screen plate (602) is connected to the feed port of the receiving hopper (601), a first circulation connecting pipe (603) is provided on the receiving hopper (601), a circulation sedimentation bin (604) is connected below the first circulation connecting pipe (603), an extraction component (605) is provided on one side of the circulation sedimentation bin (604), a circulation discharge pipe (606) is connected to the circulation sedimentation bin (604), a first circulation valve (607) is provided on the circulation discharge pipe (606), a circulation water outlet pipe (608) is connected to the circulation sedimentation bin (604), a second circulation valve (609) is provided on the circulation water outlet pipe (608), a circulation pump (610) is provided on the circulation water outlet pipe (608), and the circulation water outlet pipe (608) is connected to the pretreatment mechanism (4).

10. A solid-liquid separation device for chemical industry according to claim 9, characterized in that: The extraction assembly (605) includes an extraction chamber (6051) arranged on one side of the circulation sedimentation chamber (604), the extraction chamber (6051) is arranged in the support cylinder (2), the extraction chamber (6051) is connected to an extraction pipe (6052), the end of the extraction pipe (6052) away from the extraction chamber (6051) is connected to the circulation sedimentation chamber (604), and the extraction pipe (6052) is provided with an extraction pump (6053).

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