Filtering and crystallizing device for chemical product processing

Abstract

The invention discloses a filtering and crystallizing device for chemical product processing, and relates to the technical field of chemical product processing, the filtering and crystallizing device comprises a bottom plate and a support arranged on the bottom plate, the support is fixedly connected with a treatment tank, a discharging pipe is arranged at the bottom end of the treatment tank, and the filtering and crystallizing device further comprises a filtering mechanism arranged at the output end of the discharging pipe; the filtering mechanism comprises a filtering box, a supporting assembly is arranged in the filtering box, the supporting assembly is provided with four baffles, and the four baffles divide the interior of the filtering box into a waiting station, a filtering station, an extruding station and a discharging station which are annularly arranged and sequentially connected. The four-station circulation design is achieved, the integration of filtering, liquid removing and discharging of the chemical crystallization process is achieved, chemical products are filtered and crystallized, meanwhile, filter cakes can be extruded and pushed to be discharged, the risk that a filter plate is blocked is reduced, the moisture content of the filter cakes is also reduced, and the quality of the filter cakes is improved. And the subsequent drying treatment cost of the chemical product crystal is further reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of chemical product processing, and particularly to a filtration and crystallization device for chemical product processing. Background Art

[0002] In the process of chemical product processing, by utilizing the differences in the solubility of different substances in the same solvent with the change of conditions such as temperature, the target product is crystallized out from the solution, while the impurities remain in the solution, thereby achieving separation and purification. For example, in a mixed solution of potassium nitrate and sodium chloride, through cooling crystallization, potassium nitrate will preferentially crystallize out, and relatively pure potassium nitrate crystals can be obtained. After the crystallization process is completed, the mother liquor attached to the crystal surface is removed by filtration, thereby reducing the content of impurities and improving the purity of the product.

[0003] When filtering chemical products after crystallization, the crystallized solid particles are intercepted by the filter medium. As the filtration process continues, more and more deposited crystal particles accumulate, and finally a filter cake with a certain thickness and structure is formed. Moreover, during the filtration process, if the crystal particles are fine and irregular in shape, their specific surface area is relatively large, and they will adsorb more mother liquor. Or if there are pores inside the crystals, a certain amount of mother liquor will also be intercepted, resulting in a relatively high moisture content in the filter cake. And for a filter cake with a high moisture content, more energy is required for drying during the subsequent drying process to meet the product quality standards. This not only increases the load and operation time of the drying equipment, but also increases energy consumption and production costs. At the same time, during the continuous filtration process of the high-moisture-content filter cake, it is easy to cause blockage of the filter medium, thereby affecting the smoothness of crystal filtration and further reducing the efficiency of chemical product crystallization filtration. Summary of the Invention

[0004] The purpose of the present invention is to provide a filtration and crystallization device for chemical product processing to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A filtration and crystallization device for chemical product processing, including a bottom plate and a bracket arranged on the bottom plate. The bracket is fixedly connected with a processing tank, and a discharge pipe is provided at the bottom end of the processing tank. It further includes a filtration mechanism arranged at the output end of the discharge pipe;

[0006] The filtration mechanism includes a filtration box. A support assembly is arranged inside the filtration box. The support assembly has four baffles, and the four baffles divide the inside of the filtration box into a waiting station, a filtration station, an extrusion station, and a discharge station that are arranged circumferentially and are connected in sequence. Four filter plates corresponding to the above four stations are also arranged inside the filtration box. The inner ends of the four filter plates are connected to the same rotating rod. The filter plates divide the inside of the filtration box into a purification chamber located above and a solution chamber located below. A connecting pipe communicating with the solution chamber is provided at the bottom end of the filtration box;

[0007] The filtering station faces the output end of the discharge pipe;

[0008] The filtering box is provided with an extrusion assembly for extruding the crystal filter cake in the extrusion station area;

[0009] The filtering box is also provided with a discharge hole in the discharge station area, and the filtering box is provided with a discharge assembly for discharging the crystal filter cake from the discharge hole in the discharge station area;

[0010] The output end of the discharge pipe is further provided with a rotating assembly for driving the rotating rod to rotate.

[0011] Further, the rotating assembly includes a support plate fixedly connected to the side wall of the discharge pipe, a rotating driving device is installed on the support plate, and the output end of the rotating driving device is connected to the rotating rod.

[0012] Further, the discharge hole is located in the lower area of the filter plate;

[0013] The filter plate is connected to the rotating rod through a telescopic assembly;

[0014] The telescopic assembly includes a telescopic hole opened on the rotating rod, and at least two fixing rods are arranged in each telescopic hole;

[0015] The inner end of the filter plate is connected with a sliding plate sleeved on the fixing rod and slidable relative to the fixing rod;

[0016] The telescopic assembly further includes a telescopic spring sleeved on the fixing rod, and the upper and lower ends of the telescopic spring respectively abut against the top of the telescopic hole wall and the top of the sliding plate, so that the filter plate is in a high position state.

[0017] Further, the extrusion assembly includes an extrusion driving device installed on the filtering box, and the output end of the extrusion driving device is connected with an extrusion plate located in the purification chamber at the extrusion station and movable up and down relative to the filter plate, and the extrusion plate is adapted to the shape of the filter plate.

[0018] Further, the discharge assembly includes a first U-shaped discharge plate in the purification chamber at the discharge station, the two ends of the first U-shaped discharge plate are connected with two second U-shaped discharge plates through T-shaped guide plates, the two second U-shaped discharge plates are connected with a third U-shaped discharge plate through T-shaped guide plates, the ends of the two third U-shaped discharge plates are connected with a connecting strip, and the connecting strip is connected with a driving frame through an elastic assembly;

[0019] A guiding assembly for guiding the height position of the first U-shaped discharge plate is further arranged in the filtering box;

[0020] It further includes a driving assembly for driving the two driving frames to move radially along the paths corresponding to the two ends of the filter plate.

[0021] Further, two inclined slots adapted to the two end portions of the filter plate are formed in the filter box in the area of the discharging station;

[0022] The driving assembly includes two groups of driving fixed plate groups connected to the filter box. Each group of driving fixed plate groups includes two oppositely arranged driving fixed plates. The driving assembly further includes a driving rod and a limiting rod respectively located at the two inclined slots. The driving rod is rotatably connected to one group of driving fixed plates, and the limiting rod is connected to the other fixed plate group;

[0023] The two driving frames are respectively matched with the driving rod and the limiting rod;

[0024] The driving assembly further includes a discharging driving device for driving the driving rod to rotate.

[0025] Further, the elastic assembly includes a telescopic rod located in the driving frame. The top end of the telescopic rod is connected with a telescopic plate;

[0026] The elastic assembly further includes a driving spring sleeved on the telescopic rod. The two ends of the driving spring respectively abut against the telescopic plate and the bottom end of the inner wall of the driving frame, so that the telescopic rod is in a high position state.

[0027] Further, the guiding assembly includes a guiding plate connected to the filter box. The guiding plate is located on the path of the radial movement of the first U-shaped discharging plate;

[0028] The inner side surface of the guiding plate is arranged as an inclined surface capable of cooperating with the first U-shaped discharging plate;

[0029] When the first U-shaped discharging plate moves radially outward relative to the filter plate, the inclined surface acts on the first U-shaped discharging plate, so that the first U-shaped discharging plate gradually moves downward and abuts against the bottom end of the guiding plate and moves.

[0030] Further, an isolation assembly is further included;

[0031] The isolation assembly includes four jacks formed in the filter box and respectively adapted to the four stations;

[0032] The isolation assembly includes an isolation ring sleeved on the rotating rod. Four isolation plates respectively capable of sliding up and down with the four jacks are connected to the outer peripheral surface of the isolation ring. When the four isolation plates pass through the jacks and are located at the limit position of downward movement, the purification chambers at the waiting station, the filtering station, the extrusion station and the discharging station are in an independent state;

[0033] The isolation assembly further includes two L-shaped plates. A threaded rod and a limiting rod are respectively arranged on the two L-shaped plates. The isolation ring is in threaded cooperation with the threaded rod and in through cooperation with the limiting rod. An isolation driving device for driving the threaded rod to rotate is further arranged on the L-shaped plate.

[0034] Further, the support assembly further includes three first support rings respectively located in the solution chambers at the waiting station, the filtration station, and the extrusion station, and a second support ring located in the solution chamber at the discharging station. The second support ring is located below the first support ring, and both the first support ring and the second support ring are used to support the filter plate.

[0035] Compared with the prior art, the beneficial effects of the present invention are as follows: In the present invention, compared with the traditional intermittent filtration, through the setting of the filtration mechanism and in combination with the extrusion assembly and the discharging assembly, a four-station cyclic design is achieved, realizing the integration of "filtration - liquid separation - discharging" in the chemical crystallization process. While filtering and crystallizing chemical products, it can also perform extrusion and discharging operations on the filter cake, not only reducing the risk of clogging of the filter plate, but also reducing the moisture content of the filter cake, thereby reducing the subsequent drying cost of chemical product crystals. It can be seen that this embodiment has breakthroughs in terms of efficiency, purity, and economy, meeting the development trend of modern chemical equipment towards high efficiency, energy conservation, and intelligence. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0037] Figure 2 is a schematic diagram of the internal structure of the cooling assembly in the present invention;

[0038] Figure 3 is a schematic diagram of the positional structure of the filtration assembly and the discharging pipe in the present invention;

[0039] Figure 4 is a schematic diagram of the internal structure of the filtration assembly in the present invention;

[0040] Figure 5 is a schematic diagram of the internal partition structure of the filtration tank in the present invention;

[0041] Figure 6 is a schematic diagram of the positional structure of the extrusion assembly, the discharging assembly, the isolation assembly, and the support assembly in the present invention;

[0042] Figure 7 is Figure 6 a schematic diagram of the isolation assembly structure in

[0043] Figure 8 is Figure 6 a schematic diagram of the discharging assembly structure in

[0044] Figure 9 is Figure 8 an enlarged view of part A in

[0045] Figure 10 is Figure 6Schematic diagram of the telescopic component structure.

[0046] In the figure: 101, bottom plate; 102, bracket; 103, treatment tank; 104, stirring member; 105, discharge pipe; 2, cooling mechanism; 201, interlayer; 202, liquid inlet pipe; 203, liquid outlet pipe; 204, pressure reducing valve; 3, filtering mechanism; 301, filter box; 302, rotating rod; 303, baffle; 304, filtering station; 305, extrusion station; 306, discharging station; 307, waiting station; 308, filter plate; 4, extrusion assembly; 401, extrusion plate; 402, extrusion driving device; 5, discharging assembly; 501, first U-shaped discharging plate; 502, second U-shaped discharging plate; 503, third U-shaped discharging plate; 504, discharge hole; 6, driving assembly; 601, fixing plate; 602, driving rod; 603, driving frame; 604, connecting bar; 605, positioning rod; 606, inclined groove; 607, discharging driving device; 7, elastic assembly; 701, telescopic plate; 702, telescopic rod; 703, driving spring; 8, guiding assembly; 801, guiding plate; 802, inclined surface; 9, isolation assembly; 901, isolation ring; 902, isolation plate; 903, jack; 904, L-shaped plate; 906, limiting rod; 907, threaded rod; 908, isolation driving device; 10, supporting assembly; 1001, first support ring; 1002, second support ring; 11, telescopic assembly; 1101, telescopic hole; 1102, fixing rod; 1103, telescopic spring; 12, rotating assembly; 1201, support plate; 1202, rotating driving device. Detailed implementation manners

[0047] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0048] Please refer to Figures 1 - 10 , the present invention provides a technical solution: a filtering and crystallization device for chemical product processing, including a bottom plate 101 and a bracket 102 provided on the bottom plate 101. The bracket 102 is fixedly connected with a treatment tank 103. A discharge pipe 105 is provided at the bottom end of the treatment tank 103. A control valve is provided on the discharge pipe 105. A filtering mechanism 3 is further provided at the output end of the discharge pipe 105;

[0049] The filtering mechanism 3 includes a filtering box 301. Inside the filtering box 301, a supporting component 10 is provided. The supporting component 10 has four baffles 303. The four baffles 303 divide the interior of the filtering box 301 into a waiting station 307, a filtering station 304, an extrusion station 305, and a discharging station 306 that are arranged circumferentially and are connected in sequence. Inside the filtering box 301, four filtering plates 308 corresponding to the aforementioned four stations are also provided. The inner ends of the four filtering plates 308 are connected to the same rotating rod 302. The filtering plates 308 divide the inside of the filtering box 301 into a purification chamber located above and a solution chamber located below. At the bottom end of the filtering box 301, a connecting pipe communicating with the solution chamber is provided;

[0050] The filtering station 304 is opposite to the output end of the discharging pipe 105;

[0051] In the area of the extrusion station 305 of the filtering box 301, an extrusion component 4 for extruding the crystal cake is provided;

[0052] In the area of the discharging station 306 of the filtering box 301, a discharging hole 504 is also opened. In the area of the discharging station 306 of the filtering box 301, a discharging component 5 for discharging the crystal cake from the discharging hole 504 is provided;

[0053] At the output end of the discharging pipe 105, a rotating component 12 for driving the rotating rod 302 to rotate is also provided.

[0054] In this embodiment, as Figure 2 shown, inside the processing tank 103, a stirring member 104 for stirring the chemical product during the cooling crystallization process is provided. The stirring member 104 is a prior art and will not be elaborated here. On the processing tank 103, a cooling mechanism 2 for cooling the chemical product during the crystallization process is also provided. The cooling mechanism 2 includes an interlayer 201 opened on the processing tank 103. On the processing tank 103, a liquid inlet pipe 202 and a liquid outlet pipe 203 communicating with the interlayer 201 are provided. The liquid inlet pipe 202 and the liquid outlet pipe 203 are arranged at different heights, and a pressure reducing valve 204 is provided on the side wall of the liquid outlet pipe 203.

[0055] During application, when cooling and crystallizing chemical products, first, the mixed solution after the chemical product production reaction is transported into the treatment tank 103. There is mother liquor in the treatment tank 103 in advance. Then, the cooling medium is transported from the liquid inlet pipe 202 into the interlayer 201 through an external high-pressure pump. When the cooling medium enters the interlayer 201, when the cooling medium deposits at the bottom of the interlayer 201, under the control of the pressure reducing valve 204 of the liquid outlet pipe 203, the cooling medium in the interlayer 201 will not flow out. With the continuous injection of the cooling medium in the interlayer 201, when the pressure of the cooling medium in the interlayer 201 exceeds the set pressure, it will flow out through the liquid outlet pipe 203, thus realizing the continuous flow of the cooling medium, ensuring the continuous cooling of the chemical product. And during the process of the cooling medium cooling the chemical product solution, the stirring member 104 can be used to stir the chemical product solution to form a more uniform flow field in the treatment tank 103, enhancing the heat transfer and mass transfer efficiency.

[0056] With the circulation and flow of the cooling medium absorbing the heat of the chemical product solution, the solution temperature gradually decreases. As the solution temperature decreases, when it reaches the supersaturation point of the chemical product, crystallization begins. After crystallization is completed, the solution containing crystals can flow into the filtration box 301 through the discharge pipe 105. Specifically:

[0057] Waiting station 307, the filter plate 308 prepares to receive materials;

[0058] Filtration station 304, facing the discharge pipe 105, the chemical product solution (containing crystals) enters the purification chamber. The solution seeps into the lower solution chamber through the filter plate 308. The connecting pipe can return or export the mother liquor. The separation between the mother liquor and the crystals is realized at the filtration station 304. At the same time, with the continuation of filtration, a filter cake with a certain thickness and structure will be formed on the surface of the filter plate 308 under the continuous deposition of crystal particles.

[0059] Extrusion station 305, after a filter cake is formed on the surface of the filter plate 308, the rotating assembly 12 drives the rotating rod 302 to drive the four filter plates 308 to rotate. When the filter plate 308 with a filter cake deposited on its surface rotates from the filtration station 304 to the extrusion station 305, the filter cake is extruded by the extrusion assembly 4, so that under the extrusion action, part of the mother liquor in the filter cake is extruded, thus reducing the moisture content of the filter cake.

[0060] At the discharging station 306, the four filter plates 308 are then driven to rotate again, and the filter cake after extrusion will be rotated to the discharging station 306. The discharging assembly 5 is used to push the filter cake on the surface of the filter plate 308 until the filter cake is removed from the discharging hole 504, thereby realizing the discharging operation of the filter cake. Then, the four filter plates 308 can be driven to rotate again, so that after the discharging is completed, the filter plates 308 are rotated to the waiting station 307 to receive the next round of filtration, extrusion, and discharging operations.

[0061] It should be noted here that: compared with the traditional intermittent filtration, through the setting of the filtration mechanism 3, combined with the extrusion assembly 4 and the discharging assembly 5, a four-station cyclic design is realized, achieving the integration of "filtration - dewatering - discharging" in the chemical crystallization process. While filtering and crystallizing chemical products, it can also extrude and push the filter cake for discharging, not only reducing the moisture content of the filter cake, but also reducing the risk of blockage of the filter plate 308. Furthermore, it reduces the subsequent drying treatment cost of chemical product crystals. It can be seen that this embodiment has breakthroughs in efficiency, purity, and economy, meeting the development trend of modern chemical equipment towards high efficiency, energy conservation, and intelligence.

[0062] Preferably, the rotating assembly 12 includes a support plate 1201 fixedly connected to the side wall of the discharging pipe 105. A rotating driving device 1202 is installed on the support plate 1201, and the output end of the rotating driving device 1202 is connected to the rotating rod 302.

[0063] In this embodiment, the rotating driving device 1202 can be selected from a reduction motor, a rotary cylinder, etc. Starting the rotating driving device 1202 can drive the rotating rod 302 to rotate.

[0064] Preferably, the discharging hole 504 is located in the lower area of the filter plate 308;

[0065] The filter plate 308 is connected to the rotating rod 302 through a telescopic assembly 11;

[0066] The telescopic assembly 11 includes a telescopic hole 1101 opened on the rotating rod 302, and at least two fixing rods 1102 are arranged in each telescopic hole 1101;

[0067] The inner end of the filter plate 308 is connected with a sliding plate sleeved on the fixing rod 1102 and slidable relative to the fixing rod 1102;

[0068] The telescopic assembly 11 further includes a telescopic spring 1103 sleeved on the fixing rod 1102. The upper and lower ends of the telescopic spring 1103 respectively abut against the top of the telescopic hole 1101 wall and the top of the sliding plate, so that the filter plate 308 is in a high position state.

[0069] In this embodiment, the discharge hole 504 is arranged below the filter plate 308, which can prevent the filter cake from accidentally detaching from the discharge hole 504. The telescopic assembly 11 is arranged to enable the downward movement of the filter plate 308 relative to the rotating rod 302 (due to the self-weight of the filter cake and external forces) to meet the position requirement of being communicated with the discharge hole 504.

[0070] Preferably, the extrusion assembly 4 includes an extrusion driving device 402 installed on the filter box 301. The output end of the extrusion driving device 402 is connected with an extrusion plate 401 located in the purification cavity at the extrusion station 305 and capable of moving up and down relative to the filter plate 308. The extrusion plate 401 is adapted to the shape of the filter plate 308.

[0071] In this embodiment, the extrusion driving device 402 can be an electric push rod or a cylinder. The extrusion plate 401 is completely matched with the contour of the filter plate 308 (sector shape) to ensure uniform pressure distribution during extrusion, avoiding pressure leakage at the edge of the filter cake or local stress concentration. During application, starting the extrusion driving device 402 can cause the extrusion plate 401 to press down the filter cake. Under the extrusion action, part of the mother liquor in the filter cake is extruded, thereby reducing the moisture content of the filter cake.

[0072] Preferably, the discharge assembly 5 includes a first U-shaped discharge plate 501 located in the purification cavity at the discharge station 306. The two ends of the first U-shaped discharge plate 501 are connected with two second U-shaped discharge plates 502 through T-shaped guide plates. The two second U-shaped discharge plates 502 are connected with a third U-shaped discharge plate 503 through T-shaped guide plates. The ends of the two third U-shaped discharge plates 503 are connected with a connecting strip 604. The connecting strip 604 is connected with a driving frame 603 through an elastic assembly 7;

[0073] A guiding assembly 8 for guiding the height position of the first U-shaped discharge plate 501 is further arranged in the filter box 301;

[0074] It further includes a driving assembly 6 for driving the two driving frames 603 to move radially along the paths corresponding to the two ends of the filter plate 308.

[0075] In this embodiment, the telescopic design of the first U-shaped discharge plate 501, the second U-shaped discharge plate 502 and the third U-shaped discharge plate 503 can meet the path spacing requirements of the two driving frames 603 during the radial movement of the first U-shaped discharge plate 501.

[0076] The guiding assembly 8 is used to guide the first U-shaped discharge plate 501 to move in a sinking manner, so that it can overcome the elastic supporting force of the telescopic assembly 11 to press down the filter plate 308 at the discharge station 306 during the radial outward movement, so that the filter cake can be pushed out by the first U-shaped discharge plate 501 facing the discharge hole 504.

[0077] Preferably, two chute grooves 606 adapted to the two end parts of the filter plate 308 are formed in the filter box 301 in the area of the discharging station 306;

[0078] The driving assembly 6 includes two groups of driving fixed plate groups connected to the filter box 301. Each group of driving fixed plate groups includes two oppositely arranged driving fixed plates 601. The driving assembly 6 further includes a driving rod 602 and a limiting rod 605 respectively located at the two chute grooves 606. The driving rod 602 is rotatably connected to one group of driving fixed plates, and the limiting rod 605 is connected to the other fixed plate group;

[0079] The two driving frames 603 are respectively matched with the driving rod 602 and the limiting rod 605;

[0080] The driving assembly 6 further includes a discharging driving device 607 for driving the driving rod 602 to rotate.

[0081] In this embodiment, the discharging driving device 607 can be a reduction motor. The driving rod 602 can be a lead screw, and the driving frame 603 matched with the driving rod 602 has a nut seat matched with the lead screw. Starting the discharging driving device 607 can drive the driving rod 602 to rotate. Under the cooperation of the driving frame 603 and the driving rod 602, the driving frame 603 can be driven to move radially. Under the limiting cooperation of the limiting rod 605 and the other driving frame 603, the stability of the telescopic and radial movement of the first U-shaped discharging plate 501, the second U-shaped discharging plate 502 and the third U-shaped discharging plate 503 can be improved.

[0082] Preferably, the elastic assembly 7 includes a telescopic rod 702 located in the driving frame 603, and the top end of the telescopic rod 702 is connected with a telescopic plate 701;

[0083] The elastic assembly 7 further includes a driving spring 703 sleeved on the telescopic rod 702. The two ends of the driving spring 703 respectively abut against the telescopic plate 701 and the bottom end of the frame wall of the driving frame 603, so that the telescopic rod 702 is in a high position state.

[0084] In this embodiment, the elastic assembly 7 can meet the position requirement of the up and down movement of the first U-shaped discharging plate 501 and provide an elastic supporting force for the reset of the first U-shaped discharging plate 501.

[0085] Preferably, the guiding assembly 8 includes a guiding plate 801 connected to the filter box 301. The guiding plate 801 is located on the path of the radial movement of the first U-shaped discharging plate 501;

[0086] The inner side surface of the guiding plate 801 is provided with an inclined surface 802 capable of cooperating with the first U-shaped discharging plate 501;

[0087] When the first U-shaped discharge plate 501 moves radially outward relative to the filter plate 308 , the inclined surface 802 acts on the first U-shaped discharge plate 501 , so that the first U-shaped discharge plate 501 gradually moves downward and abuts against the bottom end of the guide plate 801 .

[0088] In this embodiment, the first U-shaped discharge plate 501 is pushed against the surface of the filter plate 308 by the setting of the guide assembly 8, so as to be used to discharge the filter cake on the surface of the filter plate 308.

[0089] Preferably, it also includes an isolation component 9;

[0090] The isolation assembly 9 includes four sockets 903 opened in the filter box 301 and respectively adapted to four workstations;

[0091] The isolation assembly 9 includes an isolation ring 901 sleeved on the rotating rod 302, and the outer peripheral surface of the isolation ring 901 is connected with four isolation plates 902 that can slide up and down with four plug holes 903 respectively. When the four isolation plates 902 pass through the plug holes 903 and are located at the extreme position of downward movement, the purification chambers of the waiting station 307, the filtering station 304, the extrusion station 305 and the discharging station 306 are in an independent state;

[0092] The isolation assembly 9 also includes two L-shaped plates 904, on which are respectively provided a threaded rod 907 and a limiting rod 906, the isolation ring 901 is threadedly matched with the threaded rod 907, the isolation ring 901 is through-matched with the limiting rod 906, and the L-shaped plate 904 is also provided with an isolation driving device 908 for driving the threaded rod 907 to rotate.

[0093] In this embodiment, a reduction motor can be used for the isolation driving device 908. Starting the isolation driving device 908 can drive the isolation ring 901 to move up and down, and then drive the four isolation plates 902 to move up and down to isolate the filter plates 308 on each station or unlock the isolation on each station.

[0094] When the four filter plates 308 need to be rotated, the isolation driving device 908 is started to drive the threaded rod 907 to rotate, and then the isolation ring 901 is driven to move away from the filter box 301 under the threaded engagement transmission action of the threaded rod 907 and the isolation ring 901 and the guiding action of the limit rod 906, and then the four isolation plates 902 on one side of the isolation ring 901 are driven to move from the socket 903, thereby releasing the isolation between the four filter plates 308. At this time, the four filter plates 308 can be driven to rotate under the rotation action of the rotating component 12; when the four filter plates 308 are all performing corresponding work, the four filter plates 308 are isolated by using the isolation component 9.

[0095] Preferably, the support assembly 10 further includes three first support rings 1001 respectively located in the solution chambers at the waiting station 307, the filtering station 304, and the extrusion station 305, and a second support ring 1002 located in the solution chamber at the discharging station 306. The second support ring 1002 is located below the first support ring 1001, and both the first support ring 1001 and the second support ring 1002 are used to support the filter plate 308.

[0096] In this embodiment, both the first support ring 1001 and the second support ring 1002 are used to support the filter plate 308, that is, to limit the downward movement amount of the filter plate 308. At the discharging station 306, since the filter plate 308 needs to move downward under the action of the discharging assembly 5 to facilitate the removal of the filter cake from the discharging hole 504, therefore, the second support ring 1002 needs to be located below the first support ring 1001.

Claims

1. A filtering and crystallizing device for chemical product processing, comprising a bottom plate (101) and a bracket (102) arranged on the bottom plate (101), wherein the bracket (102) is fixedly connected to a processing tank (103), and a discharge pipe (105) is arranged at the bottom end of the processing tank (103), characterized in that: It also includes a filtering mechanism (3) arranged at the output end of the discharge pipe (105); The filtering mechanism (3) comprises a filtering box (301), wherein a supporting assembly (10) is arranged in the filtering box (301), wherein the supporting assembly (10) has four baffles (303), wherein the four baffles (303) divide the interior of the filtering box (301) into a waiting station (307), a filtering station (304), an extrusion station (305) and a discharging station (306) which are arranged in a circular direction and connected in sequence, and wherein four filtering plates (308) corresponding to the aforementioned four stations are also arranged in the filtering box (301), wherein the inner side ends of the four filtering plates (308) are connected to the same rotating rod (302), wherein the filtering plates (308) divide the interior of the filtering box (301) into a purification chamber located at the top and a solution chamber located at the bottom, and wherein a connecting pipe communicating with the solution chamber is arranged at the bottom end of the filtering box (301); The filtering station (304) is directly opposite to the output end of the discharge pipe (105); The filter box (301) is provided with an extrusion assembly (4) for extruding the crystal filter cake in the extrusion station (305) area; The filter box (301) is also provided with a discharge hole (504) in the discharge station (306) area, and the filter box (301) is provided with a discharge assembly (5) in the discharge station (306) area for discharging the crystal filter cake from the discharge hole (504); The output end of the discharge pipe (105) is also provided with a rotating assembly (12) for driving the rotating rod (302) to rotate.

2. The filtration crystallization device for chemical product processing according to claim 2, characterized in that: The rotating assembly (12) comprises a support plate (1201) fixedly connected to the side wall of the discharge pipe (105), a rotating drive device (1202) is installed on the support plate (1201), and the output end of the rotating drive device (1202) is connected to the rotating rod (302).

3. The filtration crystallization device for chemical product processing according to claim 1, characterized in that: The discharge hole (504) is located in the lower area of ​​the filter plate (308); The filter plate (308) is connected to the rotating rod (302) via a telescopic assembly (11); The telescopic assembly (11) comprises a telescopic hole (1101) formed on the rotating rod (302), and at least two fixing rods (1102) are arranged in each telescopic hole (1101); The inner end of the filter plate (308) is connected to a sliding plate which is sleeved on the fixing rod (1102) and can slide relative to the fixing rod (1102); The telescopic assembly (11) further comprises a telescopic spring (1103) sleeved on the fixed rod (1102), wherein the upper and lower ends of the telescopic spring (1103) respectively abut against the top of the wall of the telescopic hole (1101) and the top of the sliding plate, so that the filter plate (308) is in a high position.

4. The filtration crystallization device for chemical product processing according to claim 1, characterized in that: The extrusion assembly (4) comprises an extrusion drive device (402) installed on the filter box (301), and the output end of the extrusion drive device (402) is connected to an extrusion plate (401) located in the purification chamber of the extrusion station (305) and movable up and down relative to the filter plate (308), and the extrusion plate (401) is adapted in shape to the filter plate (308).

5. The filtration crystallization device for chemical product processing according to claim 3, characterized in that: The discharging assembly (5) comprises a first U-shaped discharging plate (501) located in the purification chamber of the discharging station (306), two ends of the first U-shaped discharging plate (501) are connected to two second U-shaped discharging plates (502) via T-shaped guide plates, the two second U-shaped discharging plates (502) are connected to a third U-shaped discharging plate (503) via T-shaped guide plates, the ends of the two third U-shaped discharging plates (503) are connected to connecting strips (604), and the connecting strips (604) are connected to a driving frame (603) via an elastic assembly (7); The filter box (301) is also provided with a guide assembly (8) for guiding the height position of the first U-shaped discharge plate (501); It also includes a driving assembly (6) for driving the two driving frames (603) to move radially along paths corresponding to the two ends of the filter plate (308).

6. The filtration crystallization device for chemical product processing according to claim 5, characterized in that: The filter box (301) is provided with two inclined slots (606) respectively adapted to the two ends of the filter plate (308) in the discharge station (306) area; The driving assembly (6) comprises two groups of driving fixed plate groups connected to the filter box (301), each group of driving fixed plate groups comprises two driving fixed plates (601) arranged opposite to each other, and the driving assembly (6) further comprises a driving rod (602) and a limiting rod (605) respectively located at the two inclined grooves (606), the driving rod (602) being rotatably connected to one driving fixed plate group, and the limiting rod (605) being connected to the other fixed plate group; The two driving frames (603) are respectively matched with the driving rod (602) and the limiting rod (605); The driving assembly (6) further comprises a discharging driving device (607) for driving the driving rod (602) to rotate.

7. The filtration crystallization device for chemical product processing according to claim 5, characterized in that: The elastic component (7) comprises a telescopic rod (702) located in the driving frame (603), and the top end of the telescopic rod (702) is connected to a telescopic plate (701); The elastic component (7) further comprises a driving spring (703) sleeved on the telescopic rod (702), wherein two ends of the driving spring (703) respectively abut against the telescopic plate (701) and the bottom end of the frame wall of the driving frame (603), and the telescopic rod (702) is placed in a high position.

8. The filtration crystallization device for chemical product processing according to claim 5, characterized in that: The guide assembly (8) comprises a guide plate (801) connected to the filter box (301), and the guide plate (801) is located on a radial movement path of the first U-shaped discharge plate (501); The inner side surface of the guide plate (801) is configured as an inclined surface (802) that can cooperate with the first U-shaped discharge plate (501); When the first U-shaped discharge plate (501) moves radially outward relative to the filter plate (308), the inclined surface (802) acts on the first U-shaped discharge plate (501), causing the first U-shaped discharge plate (501) to gradually move downward and abut against the bottom end of the guide plate (801).

9. The filtration crystallization device for chemical product processing according to claim 1, characterized in that: Also includes an isolation component (9); The isolation component (9) comprises four jacks (903) opened in the filter box (301) and respectively adapted to four workstations; The isolation assembly (9) comprises an isolation ring (901) sleeved on the rotating rod (302), and the outer peripheral surface of the isolation ring (901) is connected with four isolation plates (902) which can slide up and down with four insertion holes (903) respectively. When the four isolation plates (902) pass through the insertion holes (903) and are located at the extreme downward position, the purification chambers of the waiting station (307), the filtering station (304), the extrusion station (305) and the discharging station (306) are in an independent state; The isolation assembly (9) further comprises two L-shaped plates (904), on which a threaded rod (907) and a limiting rod (906) are respectively provided, the isolation ring (901) is threadedly engaged with the threaded rod (907), the isolation ring (901) is through-engaged with the limiting rod (906), and the L-shaped plate (904) is also provided with an isolation driving device (908) for driving the threaded rod (907) to rotate.

10. The filtration crystallization device for chemical product processing according to claim 1, characterized in that: The support assembly (10) further comprises three first support rings (1001) of the solution chamber respectively located at the waiting station (307), the filtering station (304) and the extruding station (305), and a second support ring (1002) of the solution chamber located at the discharging station (306), wherein the second support ring (1002) is located below the first support ring (1001), and both the first support ring (1001) and the second support ring (1002) are used to support the filter plate (308).

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