Chemical solid-liquid separation device

Abstract

The application relates to a solid-liquid separation device in the chemical industry, in particular to a solid-liquid separation device for the chemical industry, which comprises a supporting cylinder, a crushing mechanism, a pretreatment mechanism, a countercurrent spraying mechanism, a separation mechanism and a circulating mechanism. The supporting cylinder is connected with a feeding pipeline at the top and is internally provided with a plurality of supporting frames and a discharging pipe; the crushing mechanism is arranged on the supporting frame and is connected with the feeding pipeline for crushing waste denitration catalyst blocks; the pretreatment mechanism is arranged below the crushing mechanism and is used for treating the waste denitration catalyst blocks; at least two groups of the countercurrent spraying mechanism are arranged on the supporting frame along the axial direction of the supporting cylinder and are spaced apart, the countercurrent spraying mechanism comprises a spraying assembly and a screening assembly, and the screening assembly realizes solid-liquid separation through a vibrating motor, a screening connecting plate, a screening baffle and a screening screen. The circulating mechanism is connected with the pretreatment mechanism. The application realizes efficient treatment and resource recovery of waste denitration catalyst, significantly improves the separation effect and optimizes the process flow.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of chemical industry, in particular to a solid-liquid separation device for chemical industry. BACKGROUND

[0002] In the field of chemical industry, solid-liquid separation technology as an important means of resource recycling and environmental protection has been rapidly developed in recent years. With the continuous expansion of industrial production scale and the increasingly stringent environmental protection requirements, the resource utilization of waste denitration catalyst has gradually become the core issue of the industry. Waste denitration catalyst contains rich valuable metals such as vanadium, tungsten and titanium, which have important economic value and strategic significance. Therefore, how to efficiently recover valuable metals from waste denitration catalyst has become one of the key problems to be solved in the field of chemical industry.

[0003] In the prior art, for the recovery of waste denitration catalyst, the waste denitration catalyst is first crushed by a crushing device, and then the crushed waste denitration catalyst is transported to a soaking pool and chemical treatment liquid is added. The waste denitration catalyst reacts with the chemical treatment solvent to generate and precipitate metals, and then the metals are separated from the liquid by a filter screen, and the types of metals are further separated to separate different metals in the solid, and then chemical reagents are added to the liquid to precipitate and precipitate other metals from the liquid.

[0004] For the related technology in the above, first, the operation process in the separation process is extremely tedious, and second, after solid-liquid separation, different metals in the solid need to be classified, and at the same time, when treating waste denitration catalyst with complex composition, it is difficult to achieve complete metal precipitation, resulting in partial valuable metals remaining in the liquid phase, low resource utilization rate, and the need for multiple separation. Therefore, it is of great significance to develop a high-efficiency, stable and simple solid-liquid separation device. SUMMARY

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

[0006] The solid-liquid separation device for chemical industry provided by the present application adopts the following technical scheme:

[0007] The utility model provides a kind of solid-liquid separation device for chemical industry, including feed pipe, support cylinder, the support cylinder top is communicated with feed pipe, several support frames are provided in the support cylinder, the support cylinder one side is provided with discharging bin, two groups of communicating ports are provided between the discharging bin and the support cylinder along vertical direction;Crushing mechanism, the crushing mechanism is arranged on the support frame, the crushing mechanism is used to crush waste denitration catalyst, the crushing mechanism includes crushing feed pipe, and the crushing feed pipe is communicated with the feed pipe;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 waste denitration catalyst crushed by the crushing mechanism;Countercurrent spray mechanism, at least two groups of countercurrent spray mechanism are arranged on the support frame along the axis direction of the support cylinder, and the countercurrent spray mechanism is used to separate solid from solid-liquid mixture treated by the pretreatment mechanism, the countercurrent spray mechanism is arranged below the pretreatment mechanism, and the countercurrent spray mechanism includes spray assembly and screening assembly, the screening assembly includes telescopic motor arranged on the support frame, the telescopic motor is vertically arranged, the driving end of the telescopic motor is vertically upward, the driving end of the telescopic motor is provided with screening connecting plate, the screening connecting plate is provided with screening baffle, the screening baffle passes through the communicating port, the screening connecting plate is provided with screening screen, the screening screen is arranged in the discharging bin, and the discharging bin is provided with discharge port;Circulating mechanism, the discharge end of the circulating mechanism is connected to the feed end of the pretreatment mechanism.

[0008] By adopting the above technical scheme, waste denitration catalyst first enters the crushing mechanism in the support cylinder through the feed pipe, and the waste denitration catalyst is efficiently crushed by the crushing mechanism, then the waste denitration catalyst particles after crushing fall into the pretreatment mechanism, and the waste denitration catalyst particles are soaked by adding chemical solvent in the pretreatment mechanism, so that the metal in the catalyst is precipitated, then the solid-liquid mixed solution of waste denitration catalyst treated by the pretreatment mechanism continues to flow to the countercurrent spray mechanism, then the solid-liquid mixed solution containing waste denitration catalyst passes through two groups of spray assemblies in turn, and the spray assemblies and the screening assemblies cooperate to separate the solid from the liquid in the solid-liquid mixed solution containing waste denitration catalyst, the separated metal slides to the discharge port through the screening screen, a small amount of liquid flows out from the discharge bin, and most of the liquid flows into the circulating mechanism below, then the circulating mechanism re-directs the liquid to the pretreatment mechanism after the metal liquid is precipitated, forming a closed loop, which not only improves the resource utilization rate, but also significantly reduces the wastewater discharge, and has good environmental performance. The whole device is compact in structure and convenient to operate, and can effectively improve the treatment efficiency and recovery value of waste denitration catalyst.

[0009] Preferably, the spacing between adjacent support frames is the same, and a plurality of support frames are arranged on the inner wall of the support cylinder in the axial direction of the support cylinder.

[0010] By adopting the above technical scheme, a plurality of support frames are arranged uniformly and spaced apart in the axial direction of the support cylinder, thereby providing a mounting basis for other mechanisms and components.

[0011] Preferably, the screening connecting plate is arranged obliquely, and the side of the screening connecting plate close to the screening screen is inclined downward, and the inclination angle of the screening screen is the same as that of the screening connecting plate.

[0012] By adopting the above technical scheme, the screening connecting plate is arranged obliquely, which can effectively guide the flow of materials, and the screening screen and the screening connecting plate have the same inclination angle, which helps to improve the screening efficiency.

[0013] Preferably, the crushing mechanism comprises a crushing support frame arranged on the support frame, a crushing bin is arranged on the crushing support frame, a crushing feed pipe is arranged at one end of the crushing bin pointing to the feed pipe, the crushing feed pipe is communicated with the feed pipe, a conical guide surface is arranged at the lower end of the crushing bin, a crushing discharge pipe is communicated with the conical guide surface, a crushing valve is arranged on the crushing discharge pipe, a crushing cylinder is arranged on the inner wall of the crushing bin, a crushing rod is arranged at the driving end of the crushing cylinder, the crushing rod points to the crushing discharge pipe, and a crushing assembly is arranged on the crushing rod.

[0014] By adopting the above technical scheme, the design of the crushing mechanism significantly improves the processing efficiency and fineness of the waste denitration catalyst. Specifically, by arranging the crushing rod driven by the crushing cylinder and the crushing assembly thereon in the crushing bin, efficient crushing of the waste denitration catalyst can be realized. The conical guide surface helps to guide the smooth flow of materials and reduce the risk of blocking the crushing discharge pipe, and the configuration of the crushing valve facilitates precise control of the discharging process, thereby improving the operation stability and flexibility of the overall device.

[0015] Preferably, the crushing assembly comprises a crushing block connected to the crushing rod, a plurality of stirring vanes are uniformly distributed on the outer edge of the crushing block, and a plurality of crushing protrusions are arranged at one end of the crushing block pointing to the crushing discharge pipe.

[0016] By adopting the above technical scheme, the stirring vanes arranged on the outer edge of the crushing block can scatter the waste denitration 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 denitration catalyst, ensuring that the material particles are more finely crushed.

[0017] Preferably, the pretreatment mechanism comprises a pretreatment bin arranged on the support frame, a pretreatment feeding pipe is arranged on the pretreatment bin, the pretreatment feeding pipe is communicated with the crushing discharge pipe, a pretreatment discharge pipe is arranged at the lower end of the pretreatment bin, a pretreatment discharge valve is arranged on the pretreatment discharge pipe, and a dosing assembly is arranged on one side of the pretreatment bin.

[0018] By adopting the above technical scheme, the pretreatment mechanism can perform chemical treatment on the crushed waste denitration catalyst. Specifically, by arranging the pretreatment bin and the dosing assembly, the addition amount of the chemical agent for precipitating metal can be accurately controlled, and the metal to be recovered in the waste denitration catalyst can be further precipitated.

[0019] Preferably, the dosing assembly comprises a dosing bin arranged on one side of the pretreatment bin, the dosing bin is arranged on the support frame, a dosing pipe is communicated with the dosing bin, one end of the dosing pipe away from the dosing bin is communicated with the pretreatment bin, and a dosing pump is arranged on the dosing pipe.

[0020] By adopting the above technical scheme, the dosing bin is arranged to facilitate storage and supply of the chemical agent, the dosing pipe is communicated to realize delivery of the chemical agent to the pretreatment bin, and the dosing pump is arranged to control the flow of the chemical agent.

[0021] Preferably, the spraying assembly comprises a guide arranged on the discharge pipe of the pretreatment mechanism, and a spraying lance arranged on the support frame, the guide is arranged between the spraying lance and the screening connecting plate, a spraying guide block is arranged on the spraying end of the spraying lance, a plurality of spraying openings are arranged on the spraying guide block, and the spraying openings are directed to the screening connecting plate.

[0022] By adopting the above technical scheme, the guide is arranged to make the waste denitration catalyst solid-liquid mixture form a water film shape, and the spraying assembly can spray the chemical agent, which can blow the solid-phase metal in the waste denitration catalyst solid-liquid mixture to the screening plate of the screening assembly to realize solid-liquid separation of the waste denitration catalyst solid-liquid mixture, and can also make the chemical agent uniformly mixed on the water curtain to prepare for the work of the subsequent circulating mechanism.

[0023] Preferably, the circulating mechanism comprises a collecting hopper arranged on the support frame, a filtering screen plate is connected to the feeding port of the collecting hopper, a circulating first connecting pipe is arranged on the collecting hopper, a circulating sedimentation bin is communicated below the circulating first connecting pipe, an extraction assembly is arranged on one side of the circulating sedimentation bin, a circulating discharge pipe is communicated on the circulating sedimentation bin, a first circulating valve is arranged on the circulating discharge pipe, a circulating water outlet pipe is communicated on the circulating sedimentation bin, a second circulating valve is arranged on the circulating water outlet pipe, a circulating pump is arranged on the circulating water outlet pipe, and the circulating water outlet pipe is communicated with the pretreatment mechanism.

[0024] By adopting the technical scheme, the circulating mechanism can realize recycling and reuse of the waste liquid after solid-liquid separation. Specifically, the receiving hopper collects the waste liquid after separation and introduces the waste liquid into the circulating sedimentation bin through the circulating first connecting pipe, and the waste liquid is subjected to sedimentation treatment in the circulating sedimentation bin to effectively remove impurities. The liquid after the sedimentation treatment can be re-conveyed to the pretreatment mechanism through the circulating outlet pipe and the circulating pump, thereby reducing resource waste.

[0025] Preferably, the extraction assembly comprises an extraction bin arranged at one side of the circulating sedimentation bin, the extraction bin is arranged in the supporting cylinder, an extraction pipe is communicated with the extraction bin, one end of the extraction pipe away from the extraction bin is connected to the circulating sedimentation bin, and an extraction pump is arranged on the extraction pipe.

[0026] By adopting the technical scheme, the extraction assembly can realize accurate dosing treatment of the waste denitration catalyst in the pretreatment bin. The chemical reagent is added in the sedimentation bin, so that the chemical reagent can react with the liquid-phase material in the sedimentation bin, and the impurities in the liquid-phase material can be further precipitated.

[0027] In summary, the present application has at least one of the following beneficial technical effects:

[0028] The cooperation of the crushing mechanism and the pretreatment mechanism can fully crush and chemically treat the waste denitration catalyst, so that the waste denitration catalyst can better react with the chemical reagent, thereby effectively improving the solid-liquid separation effect and significantly improving the comprehensive utilization rate of resources.

[0029] The countercurrent spraying mechanism drives the screening assembly to work through the telescopic motor, and effectively separates the solid and liquid in the waste denitration catalyst solution. The obliquely designed screening connecting plate can guide the material to flow in an orderly manner and prevent the material from remaining on the screening plate, thereby further optimizing the separation effect.

[0030] The circulating mechanism not only realizes recycling of the chemical reagent during the separation process, but also prevents incomplete absorption of the metal caused by insufficient reaction of the waste denitration catalyst with the chemical reagent. The circulating mechanism can further improve the metal recovery rate and reduce resource waste. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 is a structural schematic diagram of an embodiment of the present application;

[0032] Figure 2 is a cross-sectional schematic diagram of an embodiment of the present application;

[0033] Figure 3 is a structural schematic diagram of an embodiment of the present application; Figure 2enlarged view of A in FIG. 1;

[0034] Figure 4 is another perspective view of a cross-sectional schematic diagram of an embodiment of the present application;

[0035] Figure 5 is a partial schematic diagram of a spraying assembly of an embodiment of the present application.

[0036] Legend: 1, feeding pipe; 2, support cylinder; 201, support frame; 202, discharging bin; 203, discharge port; 204, communication port; 3, crushing mechanism; 301, crushing support frame; 302, crushing bin; 303, crushing feeding 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, stirring fan blade; 3093, crushing protrusion; 4, pretreatment mechanism; 401, pretreatment bin; 402, pretreatment feeding pipe; 403, pretreatment discharge pipe; 404, pretreatment discharge valve; 405, dosing assembly; 4051, dosing bin; 4052, dosing pipe; 4053, dosing pump; 5, countercurrent spraying mechanism; 501, spraying assembly; 5011, guide piece; 5012, spraying lance; 5013, spraying guide block; 5014, spraying port; 502, screening assembly; 5021, telescopic motor; 5022, screening connecting plate; 5023, screening baffle; 5024, screening screen; 6, circulating mechanism; 601, collecting hopper; 602, filtering screen plate; 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 discharge pipe; 609, second circulating valve; 610, circulating pump. DETAILED DESCRIPTION

[0037] The following will be described in detail below in combination with the accompanying Figures 1-5 The present application will be further described in detail.

[0038] Reference Figure 1 and Figure 2The chemical solid-liquid separation device provided by the embodiments of the present application comprises a supporting cylinder 2, a crushing mechanism 3, a pretreatment mechanism 4, a countercurrent spraying mechanism 5 and a circulating mechanism 6. The supporting cylinder 2 is connected with the feeding pipe 1 at the top, and a plurality of supporting frames 201 are arranged in the supporting cylinder 2. A discharging bin 202 is arranged on one side of the supporting cylinder 2, and a discharge port 203 is arranged on the discharging bin 202. The crushing mechanism 3 is arranged on the supporting frame 201, and the feeding end of the crushing mechanism 3 is connected with the feeding pipe 1, which is used for crushing the waste denitration catalyst. The pretreatment mechanism 4 is arranged below the crushing mechanism 3, and the feeding end of the pretreatment mechanism 4 is connected with the discharge end of the crushing mechanism 3. The pretreatment mechanism 4 is used for chemically treating the waste denitration catalyst, and dissolving the waste denitration catalyst in the chemical agent. The countercurrent spraying mechanism 5 is arranged in two groups along the axial direction of the supporting cylinder 2, and is arranged on the adjacent two supporting frames 201, respectively. The countercurrent spraying mechanism 5 is used for separating the solid-liquid mixture containing the waste denitration catalyst. The discharge end of the circulating mechanism 6 is connected with the feeding end of the pretreatment mechanism 4, so that the chemical agent can be recycled.

[0039] Reference Figure 2 And Figure 3 Specifically, the supporting cylinder 2 is the main structure of the whole device, and a plurality of supporting frames 201 are arranged on the inner wall of the supporting cylinder 2 in the vertical direction. The adjacent supporting frames 201 have the same spacing, and the supporting frames 201 provide a stable mounting basis for the functional components.

[0040] Reference Figure 2 , Figure 3 And Figure 4 The crushing mechanism 3 is a key component for the preliminary treatment of the waste denitration catalyst. Specifically, the crushing mechanism 3 comprises a crushing supporting frame 301, a crushing bin 302, a crushing feeding 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 supporting frame 301 is mounted on the supporting frame 201 to support the crushing bin 302. The crushing bin 302 is provided with the crushing feeding pipe 303 at one end directed to the feeding pipe 1, which is used for receiving the waste denitration catalyst delivered from the feeding pipe 1. The crushing bin 302 is provided with the conical guide surface 304 at one end directed to the countercurrent spraying mechanism 5, which helps the material to smoothly enter the subsequent treatment link. The crushing bin 302 is provided with the crushing discharge pipe 305 below, and the crushing valve 306 is arranged on the crushing discharge pipe 305 to control the outflow of the material. The crushing cylinder 307 is arranged on the top surface of the inner wall of the crushing bin 302, and the driving end of the crushing cylinder 307 is provided with the crushing rod 308 directed to the crushing discharge pipe 305. The crushing assembly 309 is arranged on the crushing rod 308.

[0041] The crushing assembly 309 comprises a crushing block 3091 connected to the crushing rod 308. The crushing block 3091 comprises a cylindrical portion on the upper side and a conical portion on the lower side, which can be fitted to the conical guide surface 304. A plurality of stirring vanes 3092 are uniformly distributed on the outer edge of the cylindrical portion of the crushing block 3091. The stirring vanes 3092 can effectively promote the uniform mixing and crushing of the material. Due to the special shape of the vanes, the stirring vanes 3092 can stir the waste denitration catalyst in the crushing bin 302 when they move up and down, thereby improving the crushing effect. The end of the crushing block 3091 pointing to the crushing discharge pipe 305 is provided with a plurality of crushing protrusions 3093. Through the impact of the crushing protrusions 3093, the waste denitration catalyst can be efficiently crushed into small particles.

[0042] In 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 to the desired particle size.

[0043] Reference Figure 2 The pretreatment mechanism 4 is used for chemically pretreating the crushed waste denitration catalyst to dissolve the waste denitration catalyst in chemical agents, so that the valuable metals in the waste denitration catalyst are precipitated.

[0044] The pretreatment mechanism 4 comprises a pretreatment bin 401, a pretreatment feeding pipe 402, a pretreatment discharge pipe 403, a pretreatment discharge valve 404, and a dosing assembly 405. As an embodiment, the chemical agent is sulfuric acid. The pretreatment mechanism 4 can perform pickling on the waste denitration catalyst in the pretreatment bin 401. After pickling, the waste denitration catalyst is dissolved in the solvent, and part of the metal particles are precipitated, forming a solid-liquid mixed solution containing the waste denitration catalyst.

[0045] The pretreatment bin 401 is arranged on the support frame 201. The pretreatment bin 401 is provided with the pretreatment feeding pipe 402. The pretreatment feeding pipe 402 is communicated with the crushing discharge pipe 305 and is used for receiving the crushed waste denitration catalyst. The pretreatment bin 401 is provided below with the pretreatment discharge pipe 403. The pretreatment discharge pipe 403 is provided with the pretreatment discharge valve 404, which is used for controlling the outflow of the pretreated material.

[0046] A dosing assembly 405 is arranged on one side of the pretreatment bin 401, and the dosing assembly 405 comprises a dosing bin 4051, a dosing pipe 4052, and a dosing pump 4053. The dosing bin 4051 is arranged on the support frame 201, and the dosing pipe 4052 is in communication with the dosing bin 4051. The dosing pipe 4052 is connected to the pretreatment bin 401 at a distal end thereof, and the dosing pump 4053 is arranged on the dosing pipe 4052. The dosing pump 4053 is used to accurately add the pretreatment chemical agent into the pretreatment bin 401. The chemical agent is fully mixed with the waste denitration catalyst to generate solids such as TiO2, SiO2, Al2O3, CaO, etc. During operation, the dosing pump 4053 quantitatively injects the pretreatment agent into the pretreatment bin 401, so that the pretreatment agent is fully mixed with the waste denitration catalyst.

[0047] The countercurrent spraying mechanism 5 is a core component for realizing solid-liquid separation. The countercurrent spraying mechanism 5 comprises a spraying assembly 501 and a screening assembly 502. The spraying assembly 501 comprises a guide 5011 arranged on the pretreatment feed pipe 402. The guide 5011 is in a strip shape and can divide the liquid into a water curtain. The spraying assembly 501 further comprises a spraying lance 5012 arranged on the support frame 201. The spraying end of the spraying lance 5012 is provided with a spraying guide block 5013. The spraying guide block 5013 is provided with a plurality of spraying ports 5014. The spraying ports 5014 are directed to the screening connecting plate 5022. The spraying guide block 5013 can divide the water flow into a plurality of water columns, and then spray the water curtain formed by the solid-liquid mixture. The spraying lance 5012 can flush the solid-liquid mixed liquid formed by the waste denitration catalyst by high-pressure water flow.

[0048] The spraying water flow sprayed by the spraying lance 5012 is sprayed on the water curtain to impact the water curtain flow from top to bottom. The momentum of the high-speed water flow will be converted into a thrust on the liquid and solid particles in the water curtain. For the solid particles in the water curtain, this momentum transmission will directly act on the surface of the particles to make them obtain additional kinetic energy, thereby changing the motion trajectory and then separating from the water curtain. The solid particles are pushed to the screening connecting plate 5022 by the water flow due to the imbalance of forces, and the liquid phase continues to flow along the main flow direction of the water curtain, thereby realizing the separation of the solid phase and the liquid phase. The light impurities and light metal particles such as CaO and SiO2 are flushed by the water flow to the screening assembly 502, and the heavy metal particles such as TiO2 sink to the lower layer. The heavy metal particles are flushed out from the lower layer by the spraying lance 5012 with greater water power.

[0049] The screening assembly 502 comprises a telescopic motor 5021, a screening connecting plate 5022, a screening baffle 5023 and a screening screen 5024 arranged on the support frame 201. The telescopic motor 5021 is vertically arranged, the driving end of the telescopic motor 5021 is vertically upward, the driving end of the telescopic motor 5021 is provided with the screening connecting plate 5022, the outer periphery of the screening connecting plate 5022 is provided with the screening baffle 5023, the screening connecting plate 5022 is provided with the screening screen 5024, and the screening screen 5024 is arranged in the discharging bin 202. The discharge port 203 is arranged on one side of the screening screen 5024.

[0050] The screening connecting plate 5022 is arranged obliquely, the screening screen 5024 is arranged obliquely, the side of the screening connecting plate 5022 close to the screening screen 5024 is obliquely downward, and the oblique angle of the screening screen 5024 is the same as that of the screening connecting plate 5022. This design enables the solid-phase material to smoothly slide to the discharge port 203 during the screening process along with the working of the telescopic motor 5021. The screening connecting plate 5022 corresponds to the communication port 204 one by one, each group of screening connecting plates 5022 passes through the corresponding communication port 204. During work, the spray gun 5012 sprays high-pressure water flow to perform countercurrent washing and selection on the pretreated waste denitration catalyst. The solid-phase material falls on the screening connecting plate 5022, and further, along with the working of the telescopic motor 5021, the screening connecting plate 5022 generates vertical reciprocating motion, and then the solid-phase material slides along the screening connecting plate 5022 to the discharge port 203. The part of the liquid phase adhered in the solid phase flows into the discharging bin 202 through the gap of the screening screen 5024 and finally flows out.

[0051] Reference Figure 4 The circulating mechanism 6 is used to realize the recycling of the material and improve the resource recovery rate. The circulating mechanism 6 comprises a collecting hopper 601 arranged on the support frame 201, and a filter screen plate 602 connected to the inlet of the collecting hopper 601. The remaining small part of the solid phase that is not washed out is left on the filter screen plate 602, which can be manually re-fed into the feeding pipe 1 subsequently.

[0052] The circulating mechanism 6 further comprises a circulating first connecting pipe 603, a circulating sedimentation bin 604, an extraction assembly 605, a circulating discharge pipe 606, a first circulating valve 607, a circulating water outlet pipe 608, a second circulating valve 609 and a circulating pump 610. The collecting hopper 601 is arranged on the support frame 201 and is used to collect the liquid-phase material after the solid-liquid separation. The collecting hopper 601 is communicated with the circulating first connecting pipe 603 below, the circulating first connecting pipe 603 is communicated with the circulating sedimentation bin 604, and the circulating sedimentation bin 604 is provided with the extraction assembly 605 on one side.

[0053] The extraction assembly 605 comprises an extraction bin 6051, an extraction pipe 6052 and an extraction pump 6053 arranged on one side of the circulating precipitation bin 604. The circulating precipitation bin 604 is provided with a circulating discharge pipe 606, and the circulating discharge pipe 606 is provided with a first circulating valve 607. The circulating precipitation bin 604 is provided with a circulating water outlet pipe 608, and the circulating water outlet pipe 608 is provided with a second circulating valve 609. The second circulating water outlet pipe 608 is provided with a circulating pump 610, and the circulating water outlet pipe 608 is communicated with the pretreatment bin 401. The circulating mechanism 6 can realize the recycling and reuse of waste liquid after solid-liquid separation. Specifically, the waste liquid after separation is collected by the collecting hopper 601 and introduced into the circulating precipitation bin 604 through the circulating first connecting pipe 603, and the waste liquid is subjected to precipitation treatment in the circulating precipitation bin 604 to effectively remove impurities. The liquid after the precipitation treatment can be transported to the pretreatment mechanism 4 again through the circulating water outlet pipe 608 and the circulating pump 610, thereby reducing resource waste.

[0054] The implementation principle of the solid-liquid separation device for chemical industry in the embodiment of the present application is as follows: the waste denitration catalyst is crushed into small particles by the crushing mechanism 3, is subjected to chemical pretreatment by the pretreatment mechanism 4, is subjected to solid-liquid separation by the countercurrent spraying mechanism 5, is separated from valuable metals such as vanadium and tungsten by the circulating mechanism 6, and finally is recycled by the circulating mechanism 6. The whole device has simple structure and convenient operation, significantly improves the resource utilization level of the waste denitration catalyst, reduces resource waste, and meets the actual needs of the chemical industry.

[0055] The above are preferred embodiments of the present application, and do not limit the protection scope of the present application. Therefore, equivalent changes made on the basis of the structure, shape and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A solid-liquid separation device for chemical applications, comprising: Feed pipe (1), A support cylinder (2) is provided, the top of which is connected to a feed pipe (1). Several support frames (201) are provided inside the support cylinder (2). A feeding bin (202) is provided on one side of the support cylinder (2). Two sets of connecting ports (204) are provided between the feeding bin (202) and the support cylinder (2) in the vertical direction. The crushing mechanism (3) is mounted on the support frame (201). The crushing mechanism (3) is used to crush waste denitrification catalyst. The crushing mechanism (3) includes a crushing feed pipe (303) which is connected to the feed pipe (1). A pretreatment mechanism (4) is provided on the support frame (201) and below the crushing mechanism (3). The pretreatment mechanism (4) is used to chemically treat the waste denitrification catalyst crushed by the crushing mechanism (3). At least two sets of countercurrent spraying mechanisms (5) are spaced apart on the support frame (201) along the axial direction of the support cylinder (2). The countercurrent spraying mechanism (5) is used to separate solids from the solid-liquid mixture after treatment by the pretreatment mechanism (4). The countercurrent spraying mechanism (5) is located below the pretreatment mechanism (4). The countercurrent spraying mechanism (5) includes a spraying assembly (501) and a screening assembly (502). The screening assembly (502) includes a telescopic motor (5021) mounted on the support frame (201). The telescopic motor (5021) is vertically mounted. The drive end of the machine (5021) is vertically upward. The drive end of the telescopic motor (5021) is provided with a screening connecting plate (5022). A screening baffle (5023) is provided on the screening connecting plate (5022). The screening connecting plate (5022) passes through the communication port (204). A screening screen (5024) is provided on the screening connecting plate (5022). The screening screen (5024) is located in the feeding bin (202). A discharge port (203) is provided on the feeding bin (202). A circulation mechanism (6) is also provided. The discharge end of the circulation mechanism (6) is connected to the feeding end of the pretreatment mechanism (4). The spray assembly (501) includes a guide (5011) disposed on the discharge end of the pretreatment mechanism (4) and a spray gun (5012) disposed on the support frame (201). The guide (5011) is disposed between the spray gun (5012) and the screening connecting plate (5022). The spray gun (5012) has a spray guide block (5013) at its spraying end. The spray guide block (5013) has a plurality of spray nozzles (5014) on it, and the spray nozzles (5014) point towards the screening connecting plate (5022).

2. The solid-liquid separation device for chemical applications according to claim 1, characterized in that, The spacing between adjacent support frames (201) is the same, and multiple support frames (201) are spaced apart on the inner wall of the support cylinder (2) along the axial direction of the support cylinder (2).

3. The solid-liquid separation device for chemical applications according to claim 1, characterized in that, The screening connecting plate (5022) is inclined, and the side of the screening connecting plate (5022) near the screening screen (5024) is inclined downward. The inclination angle of the screening screen (5024) is the same as the inclination angle of the screening connecting plate (5022).

4. A solid-liquid separation device for chemical applications according to claim 1, characterized in that, The crushing mechanism (3) includes a crushing support frame (301) mounted on the support frame (201), a crushing chamber (302) mounted on the crushing support frame (301), a tapered guide surface (304) mounted at the lower end of the crushing chamber (302), a crushing discharge pipe (305) connected to the tapered guide surface (304), a crushing valve (306) mounted on the crushing discharge pipe (305), a crushing cylinder (307) mounted on the inner wall of the crushing chamber (302), a crushing rod (308) mounted at the driving end of the crushing cylinder (307), the crushing rod (308) pointing towards the crushing discharge pipe (305), and a crushing component (309) mounted on the crushing rod (308).

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

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

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

8. A solid-liquid separation device for chemical applications according to claim 1, characterized in that, The circulation mechanism (6) includes a receiving hopper (601) mounted on the support frame (201). A filter screen plate (602) is connected to the inlet of the receiving hopper (601). A first circulation connecting pipe (603) is mounted on the receiving hopper (601). A circulation sedimentation chamber (604) is connected below the first circulation connecting pipe (603). An extraction component (605) is mounted on one side of the circulation sedimentation chamber (604). A circulation discharge pipe (606) is connected to the circulation sedimentation chamber (604). A first circulation valve (607) is mounted on the circulation discharge pipe (606). A circulation water outlet pipe (608) is connected to the circulation sedimentation chamber (604). A second circulation valve (609) is mounted on the circulation water outlet pipe (608). A circulation pump (610) is mounted on the circulation water outlet pipe (608). The circulation water outlet pipe (608) is connected to the pretreatment mechanism (4).

9. A solid-liquid separation device for chemical applications according to claim 8, characterized in that, The extraction assembly (605) includes an extraction chamber (6051) disposed on one side of the circulating sedimentation chamber (604). The extraction chamber (6051) is disposed inside the support cylinder (2). An extraction tube (6052) is connected to the extraction chamber (6051). One end of the extraction tube (6052) away from the extraction chamber (6051) is connected to the circulating sedimentation chamber (604). An extraction pump (6053) is disposed on the extraction tube (6052).

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