Filter press device after potassium fluoride concentration and its application in potassium fluoride production process

Abstract

The invention belongs to the technical field of filter press devices, in particular to a filter press device after potassium fluoride is concentrated and its application in a potassium fluoride production process; the invention comprises a support component, a driving component is arranged on one side of the support component, a plurality of filter components are evenly arranged inside the support component, and two auxiliary components are symmetrically arranged above the support component; the support component comprises two mounting frames, the tops of the mounting frames are each provided with a fixed plate, two end seats are symmetrically arranged on both sides of the fixed plate, and two sliding frames are symmetrically arranged between the two end seats; the driving component comprises a sealing plate; the filter component comprises a filter press frame, and two elastic filter cloths are symmetrically arranged inside the filter press frame; the filter press device after potassium fluoride is concentrated has high filter press efficiency and good filter press effect, meets the high-efficiency filter press demand for concentrated potassium fluoride solution, is simple to operate, safe and stable, and has high control efficiency and high regulation accuracy, thereby ensuring the large-scale filter press demand for potassium fluoride.

Description

Technical Field

[0001] The present invention belongs to the technical field of filter pressing devices, specifically a filter pressing device for potassium fluoride after concentration and its application in the production process of potassium fluoride. Background Art

[0002] The filter pressing device for potassium fluoride after concentration is a crucial piece of equipment in the production process of potassium fluoride. It is mainly used for filter pressing the concentrated potassium fluoride solution to separate solid potassium fluoride and filtrate. The working principle of the filter pressing device for potassium fluoride after concentration is as follows: The potassium fluoride solution is sent into a concentration kettle for concentration to obtain the concentrated potassium fluoride solution; the concentrated potassium fluoride solution is sent into a filter press, and through the interception of the filter plate and the filter cloth, solid particles and filtrate are separated.

[0003] Chinese invention patent CN111320351A discloses a filter cloth cleaning device for a plate and frame filter press that simultaneously cleans multiple filter cloths, including a cleaning device moving track and a lifting auxiliary material. Both ends of the cleaning device moving track are fixedly installed with lifting auxiliary materials. One side of the top of the cleaning device moving track is fixedly installed with a main traveling frame, and one side of the top of the main traveling frame is fixedly installed with a lifting motor, and the output end of the lifting motor is fixedly installed with a support body; the filter pressing efficiency of this filter press is low, and the filter pressing effect is poor.

[0004] Chinese invention patent CN119113602A discloses a self-cleaning plate filter press for mother liquor purification in the field of filtration equipment, including a frame body and an extrusion assembly. The frame body includes two parallel guide rails, and the extrusion assembly includes a number of filter pressing plates located between the two guide rails. The filter press also includes a shaking mechanism and a flushing mechanism; the operation of this filter press is difficult, and the operation accuracy is low.

[0005] When actually completing the filter pressing of the concentrated potassium fluoride solution and discharging, a large amount of filter cake is easily adhered inside the filter pressing frame. If only relying on the gravity of the filter cake itself, some filter cake cannot be separated from the filter pressing frame, which will not only reduce the recovery amount of the filter cake but also affect the subsequent filter pressing of the potassium fluoride solution.

[0006] At the same time, when discharging the filter cake on the side wall of the filter pressing frame, if different amounts of filter cake are adhered to different positions of the filter pressing frame, different amounts of cleaning gas are required for cleaning, but the prior art lacks the function of adjusting the amount of cleaning gas, so it is impossible to achieve complete and thorough cleaning; and if the amount of filter cake adhered to the side wall of the filter pressing frame is too large, only relying on the stable flow of cleaning gas cannot achieve the effect of uniformly and thoroughly cleaning the filter cake on the side wall of the filter pressing frame, and the filtering quality of the filter pressing frame is reduced.

[0007] When the filter plate is used to filter the cleaning gas for a long time, some dust and impurities are easily blocked inside the filter plate, which will reduce the quality of the subsequent cleaning gas and ultimately affect the effect of wind cleaning and blockage removal of the filter pressing frame. Summary of the Invention

[0008] In view of the above problems, the present invention provides a pressure filtration device after potassium fluoride concentration and its application in the production process of potassium fluoride.

[0009] To achieve the above object, the present invention provides the following technical solutions: A pressure filtration device after potassium fluoride concentration, including a support assembly, a driving assembly is provided on one side of the support assembly, a plurality of filtering assemblies are uniformly arranged inside the support assembly, and two auxiliary assemblies are symmetrically arranged above the support assembly;

[0010] The support assembly includes two mounting frames, fixing plates are provided on the tops of the mounting frames, two end seats are symmetrically arranged on the front and rear sides of the fixing plates, and two sliding frames are symmetrically arranged between the four end seats and on the front and rear sides of the mounting frames;

[0011] The driving assembly includes a sealing plate;

[0012] The filtering assembly includes a pressure filtration frame, two elastic filter cloths are symmetrically arranged inside the pressure filtration frame, two connecting ears are symmetrically arranged on both sides of the pressure filtration frame, an air passage is arranged inside the connecting ear, and a matching plate is arranged inside the air passage;

[0013] The auxiliary assembly includes an electric control sliding seat, a top seat is arranged on the top of the electric control sliding seat, a through hole is opened on the top of the top seat, a air supply hole is communicated with one side of the through hole, a moving pipe is hermetically slidably connected inside the through hole, a movable seat is arranged on the top of the moving pipe, a plurality of pressure sensors are uniformly arranged on the top of the movable seat, a vertical hole is opened inside the movable seat, a filter plate is hermetically slidably connected inside the vertical hole, side grooves are symmetrically opened on both sides of the vertical hole, and side plates are slidably connected inside the side grooves.

[0014] In this application, when the pressure filtration of the concentrated potassium fluoride solution is completed, the movable seat is clamped and fixed with the connecting ear. When the pressure value detected by the pressure sensor increases, it indicates that there is a large amount of filter cake on the side wall of the elastic filter cloth inside the pressure filtration frame. Then the movable seat drives the moving pipe to move upward, and the blockage amount of the air supply hole by the moving pipe decreases, and the amount of cleaning gas entering the air passage upward from the vertical hole increases; at the same time, when the movable seat moves to the end, the movable seat moves upward to the maximum distance, and the side plate drives the filter plate to move up and down inside the vertical hole and adjusts the distance from the matching plate. The amount of gas discharged from the air passage changes in pulses continuously and cooperates with the vibration of the pressure filtration frame to achieve efficient pulse cleaning of the filter cake adhered to the side wall of the elastic filter cloth; after the blockage is removed, the side plate continues to drive the filter plate to vibrate up and down and realizes self-cleaning of blockage.

[0015] Preferably, two rotating rods are symmetrically and rotatably connected to both sides of the mounting frame through bearings. A blanking plate is rotatably connected to the outer surface of the rotating rod. A discharging push rod is movably hinged to the outer surfaces of the two rotating rods. A plurality of reinforcing feet are symmetrically arranged on one side of each of the two sliding frames. A controller is arranged on one side of the end seat, and the controller electrically controls each electrical component.

[0016] Preferably, a hydraulic push rod is arranged on one side of the fixed plate. The output end of the hydraulic push rod passes through the fixed plate and is fixedly connected to the side wall of the sealing plate. The side wall of the sealing plate matches the side wall of the filter press frame. Sliding wheels are symmetrically arranged on both sides of the sealing plate. The bottom of the sliding wheel is slidably connected to the top of the sliding frame. A feed pipe is arranged at the center of one side of the fixed plate. A plurality of drain pipes are evenly arranged on one side of the fixed plate.

[0017] Preferably, an intermediate plate is arranged at the center of the filter press frame. The elastic filter cloth is located on both sides of the intermediate plate. Central through pipes are arranged at the central axes of the elastic filter cloth and the intermediate plate. A plurality of circulation pipes are evenly arranged inside the filter press frame. The output end of the feed pipe is communicated with the central through pipe. The output ends of the plurality of drain pipes are all communicated with the circulation pipes. One side of each circulation pipe is communicated with the inside of the filter press frame through a docking hole.

[0018] Preferably, one end of the air passage close to the filter press frame is communicated with the inside of the filter press frame. The output end of the air passage is located between the two elastic filter cloths. A one-way valve is arranged at the end of the air passage. The air passage direction of the one-way valve is from the matching plate to the inside of the filter press frame. Clamping grooves are arranged at the bottoms of the connecting ears. The inside of the clamping grooves is clamped with the top of the sliding frame. A plurality of positioning holes are evenly arranged inside the matching plate. A plurality of filter holes are evenly arranged inside the filter plate. The positioning holes and the filter holes are distributed in a staggered manner.

[0019] Preferably, a slide rail is slidably connected inside the electric control slide seat. Both sides of the slide rail are fixedly connected to the side wall of the end seat. An air pump is arranged on one side of the top seat. A plurality of splicing seats are evenly arranged at the bottom of the air pump. The bottom of the splicing seat is fixedly connected to the top of the electric control slide seat. The output end of the air pump is communicated with the air supply hole. The side wall of the moving pipe matches the output end of the air supply hole.

[0020] Preferably, two electric control push rods are symmetrically arranged on the top of the top seat. The top output end of the electric control push rod is hinged to the bottom of the movable seat. The inner cavity of the moving pipe is hermetically communicated with the bottom of the vertical hole. The pressure sensor is used to detect the pressure value received on the top of the movable seat. Two inner grooves are symmetrically opened on the top of the movable seat. A clamping plate is rotatably connected to the inside of each inner groove through a torsion spring. The inside of the two clamping plates matches the side wall of the connecting ear.

[0021] Preferably, the vertical holes correspond to the ventilation channels. One side of the side plate is fixedly connected to the side wall of the filter plate. A return spring is provided at the top of the side plate, and the top of the return spring is fixedly connected to the inner top of the side groove. Two elastic plates are symmetrically provided at the bottom of the filter plate, and the bottom of the elastic plate is fixedly connected to the inner wall of the vertical hole. A follower rod is provided at the bottom of the side plate, a pressing plate is provided at the bottom of the follower rod, and an arc-shaped block is provided at the bottom of the pressing plate.

[0022] Preferably, two horizontal through holes are symmetrically provided inside the movable seat. The top of the horizontal through hole communicates with the bottom of the side groove. A long rod is hermetically and slidably connected inside the horizontal through hole. A plurality of extrusion blocks are evenly provided at the top of the long rod, and the diameters of the plurality of extrusion blocks are all different. Square plates are symmetrically provided on both sides of the long rod. Two grooves are symmetrically provided on the side wall of the movable seat. The square plate matches the groove. A compression spring is provided on the side wall of the groove, and the other end of the compression spring is fixedly connected to the side wall of the square plate. The compression spring is located on the outer surface of the long rod, and the end of the square plate matches the side wall of the connecting ear.

[0023] The application of the pressure filtration device after potassium fluoride concentration in the production process of potassium fluoride includes the following steps:

[0024] S1. The concentrated potassium fluoride solution is introduced into the pressure filtration frame, and the elastic filter cloth performs pressure filtration on the concentrated potassium fluoride solution.

[0025] S2. After the pressure filtration is completed, the movable seat drives the pressure filtration frame to move in the reverse direction. When the pressure value detected by the pressure sensor increases, the movable seat moves upward and drives the moving pipe to move upward. The blocked area of the air supply hole by the moving pipe decreases, and the amount of clean gas entering the pressure filtration frame along the through hole, the moving pipe, the moving pipe, the vertical hole, and the ventilation channel increases. The wind force exerted by the clean gas inside the pressure filtration frame on the elastic filter cloth on both sides increases.

[0026] S3. When the pressure filtration frame moves to the end in the reverse direction, the pressure value detected by the pressure sensor is still greater than the set pressure preset value. The movable seat moves upward to the maximum distance, and the side plate drives the filter plate to move up and down inside the vertical hole and the ventilation channel. The amount of clean gas entering the pressure filtration frame along the ventilation channel inside the vertical hole continuously changes, and the pressure filtration frame vibrates and cooperates with the flowing pulse wind force to clean and block both sides of the elastic filter cloth.

[0027] S4. After the cleaning and blocking of the elastic filter cloth inside the pressure filtration frame are completed, the electric control sliding seat drives the movable seat to move in the reverse direction. The movable seat moves upward to the maximum distance, and the side plate drives the filter plate to vibrate up and down inside the vertical hole and cooperate with the flowing clean gas inside the vertical hole to perform self-cleaning and blocking.

[0028] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0029] 1. In the present invention, the pressure filtration device for concentrated potassium fluoride has high pressure filtration efficiency and good pressure filtration effect, meeting the high-efficiency pressure filtration requirements for concentrated potassium fluoride solution. It is simple to operate, safe and stable, with high regulation efficiency and high adjustment precision, ensuring the large-scale pressure filtration requirements for potassium fluoride.

[0030] 2. In the present invention, after the pressure filtration of the concentrated potassium fluoride is completed, the amount of gas entering the air passage inside the vertical holes is adjusted according to the amount of filter cake adhered to the side wall of the elastic filter cloth, effectively improving the self-adaptive wind cleaning effect on the elastic filter cloth inside the pressure filtration frame, with stronger dredging property and higher regulation precision.

[0031] 3. In the present invention, when the pressure filtration frame moves reversely to the end, the square plate and the connecting ear squeeze and collide with each other, driving the filter plate to move up and down inside the vertical holes and the air passage, thereby adjusting the distance between the filter cake and the matching plate, correspondingly realizing the pulsed flow of the clean gas inside the vertical holes along the air passage into the pressure filtration frame, and cooperating with the vibration of the pressure filtration frame itself to improve the detachment effect on the filter cake with larger adhesion to the side wall of the elastic filter cloth.

[0032] 4. In the present invention, after the blockage cleaning is completed, the square plate and another connecting ear squeeze and collide, thereby realizing the up and down vibration of the filter plate inside the vertical holes, and cooperating with the flow of the clean gas inside the vertical holes, efficiently realizing the blockage cleaning effect on multiple filter holes inside the filter plate, ensuring the subsequent dredging and cleaning effect on the elastic filter cloth inside the pressure filtration frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 is a three-dimensional structure diagram of the present invention;

[0034] Figure 2 is another three-dimensional structure diagram of the present invention from a different perspective;

[0035] Figure 3 is a front internal three-dimensional structure diagram of the present invention;

[0036] Figure 4 is a three-dimensional structure diagram of the filtering component of the present invention;

[0037] Figure 5 is a right three-dimensional structure diagram of the filtering component of the present invention;

[0038] Figure 6 is a top three-dimensional structure diagram of the filtering component of the present invention;

[0039] Figure 7 is Figure 6 the enlarged schematic diagram at A in

[0040] Figure 8Schematic three-dimensional structure diagram of the auxiliary component of the present invention;

[0041] Figure 9 Schematic right-view internal three-dimensional structure diagram of the auxiliary component of the present invention;

[0042] Figure 10 is Figure 9 Enlarged schematic diagram at position B in

[0043] Figure 11 Schematic front-view internal three-dimensional structure diagram of the auxiliary component of the present invention;

[0044] Figure 12 is Figure 11 Enlarged schematic diagram at position C in

[0045] In the figure: 1. Support component; 101. Mounting frame; 102. Controller; 103. Rotating rod; 104. Feeding plate; 105. Discharging push rod; 106. Reinforcing foot; 107. Fixed plate; 108. Sliding frame; 109. End seat; 2. Driving component; 201. Hydraulic push rod; 202. Sealing plate; 203. Sliding wheel; 204. Feed pipe; 205. Drain pipe; 3. Filter component; 301. Filter press frame; 302. Elastic filter cloth; 303. Intermediate plate; 304. Through pipe; 305. Flow pipe; 306. Docking hole; 307. Connecting ear; 308. Ventilation duct; 309. Check valve; 310. Clamping groove; 311. Matching plate; 312. Positioning hole; 4. Auxiliary component; 401. Electric control sliding seat; 402. Slide rail; 403. Top seat; 404. Air pump; 405. Splicing seat; 406. Through hole; 407. Air supply hole; 408. Moving pipe; 409. Movable seat; 410. Electric control push rod; 411. Pressure sensor; 412. Inner groove; 413. Card plate; 414. Vertical hole; 415. Filter plate; 416. Filter hole; 417. Side groove; 418. Elastic plate; 419. Side plate; 420. Return spring; 421. Follow-up rod; 422. Pressing plate; 423. Arc-shaped block; 424. Extrusion block; 425. Long rod; 426. Horizontal through hole; 427. Groove; 428. Square plate; 429. Compression spring. Detailed implementation manners

[0046] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with 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. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0047] Embodiment 1

[0048] As Figure 1 -Figure 12 As shown in the figure, the pressure filtration device after potassium fluoride concentration includes a support assembly 1. One side of the support assembly 1 is provided with a driving assembly 2. Inside the support assembly 1, a plurality of filtering assemblies 3 are evenly arranged. The driving assembly 2 works above the support assembly 1 and performs pressure filtration on the filtering assemblies 3. At the same time, the concentrated potassium fluoride solution forms filter cakes and filtrates after passing through the filtering assemblies 3. Two auxiliary assemblies 4 are symmetrically arranged above the support assembly 1. After the pressure filtration is completed, the auxiliary assemblies 4 work and perform separate discharging on each filtering assembly 3.

[0049] The support assembly 1 includes two mounting frames 101. The positions of the mounting frames 101 remain unchanged. Fixed plates 107 are provided at the tops of the mounting frames 101. The fixed plates 107 mainly play a role in fixed connection. Two end seats 109 are symmetrically arranged on the front and rear sides of the fixed plates 107. Between the two end seats 109 and on the front and rear sides of the mounting frames 101, two sliding frames 108 are symmetrically arranged. The sliding frames 108 are used for sliding connection with the filtering assemblies 3.

[0050] On both sides of the mounting frame 101, two rotating rods 103 are symmetrically rotatably connected through bearings. A blanking plate 104 is rotatably connected to the outer surface of the rotating rod 103. A discharging push rod 105 is movably hinged to the outer surfaces of the two rotating rods 103. When the discharging push rod 105 is started, it drives the two rotating rods 103 to rotate. The rotating rods 103 rotate and drive the blanking plate 104 to rotate. The blanking plate 104 rotates to realize the discharging and recycling of the filter cakes above. On one side of each of the two sliding frames 108, a plurality of strengthening feet 106 are symmetrically arranged. Buffer pads are provided at the bottoms of the strengthening feet 106 and the mounting frames 101. The setting of the buffer pads improves the buffer support effects of the strengthening feet 106 and the mounting frames 101. A controller 102 is provided on one side of the end seat 109. The controller 102 electrically controls each electrical component.

[0051] The driving assembly 2 includes a sealing plate 202, which realizes extrusion sealing. A hydraulic push rod 201 is provided on one side of the fixed plate 107. The output end of the hydraulic push rod 201 passes through the fixed plate 107 and is fixedly connected to the side wall of the sealing plate 202. The side wall of the sealing plate 202 matches the side wall of the pressure filtration frame 301. When the hydraulic push rod 201 is started, it drives the sealing plate 202 to move. The sealing plate 202 realizes the compaction and sealing of the filtering assemblies 3 at the end. Sliding wheels 203 are symmetrically arranged on both sides of the sealing plate 202. The bottoms of the sliding wheels 203 are slidably connected to the tops of the sliding frames 108. The sliding wheels 203 slide above the sliding frames 108, thereby improving the stability of the movement of the sealing plate 202 and the accuracy of docking. A feed pipe 204 is provided at the center of one side of the fixed plate 107. A plurality of drain pipes 205 are evenly arranged on one side of the fixed plate 107. The concentrated potassium fluoride solution enters the interiors of the plurality of filtering assemblies 3 along the feed pipe 204, and the filtrates after pressure filtration are discharged and recycled along the plurality of drain pipes 205, thus realizing the cyclic pressure filtration process.

[0052] The filter component 3 includes a pressure filter frame 301, which mainly performs pressure filtration on the concentrated potassium fluoride solution. A middle plate 303 is provided at the center of the pressure filter frame 301. Two elastic filter cloths 302 are symmetrically arranged inside the pressure filter frame 301. The elastic filter cloths 302 are located on both sides of the middle plate 303. Then, the concentrated potassium fluoride solution forms the required filter cake between adjacent pressure filter frames 301 after being filtered by multiple elastic filter cloths 302. The filtrate formed after pressure filtration reaches the middle plate 303 through the elastic filter cloths 302 and is recycled. Through pipes 304 are provided at the central axes of the elastic filter cloths 302 and the middle plate 303. The output end of the feed pipe 204 is connected to the through pipe 304. The concentrated potassium fluoride solution introduced into the feed pipe 204 flows backward successively through multiple through pipes 304. A plurality of flow pipes 305 are evenly arranged inside the pressure filter frame 301. The output ends of a plurality of drain pipes 205 are all connected to the flow pipes 305. One side of each flow pipe 305 is connected to the inside of the pressure filter frame 301 through a docking hole 306. The filtrate filtered by the elastic filter cloths 302 enters the flow pipes 305 along the docking holes 306 and is finally discharged and recycled along the plurality of drain pipes 205.

[0053] Two connecting ears 307 are symmetrically arranged on both sides of the pressure filter frame 301. Clamping grooves 310 are provided at the bottoms of the connecting ears 307. The tops of the sliding frames 108 are clamped with the interiors of the clamping grooves 310. With the cooperation of the clamping grooves 310 and the sliding frames 108, the sliding stability of the pressure filter frame 301 between the sliding frames 108 is improved. An air passage 308 is provided inside the connecting ear 307. A matching plate 311 is provided inside the air passage 308. A plurality of positioning holes 312 are evenly arranged inside the matching plate 311. The positioning holes 312 inside the matching plate 311 can filter and recycle the introduced cleaning gas, improving the cleaning effect of the cleaning gas on the elastic filter cloths 302 subsequently. One end of the air passage 308 close to the pressure filter frame 301 is connected to the inside of the pressure filter frame 301. The output end of the air passage 308 is located between the two elastic filter cloths 302. A one-way valve 309 is provided at the end of the air passage 308. The air passage direction of the one-way valve 309 is from the matching plate 311 to the inside of the pressure filter frame 301. The flow direction inside the air passage 308 is limited by the one-way valve 309. Then, the cleaning gas inside the air passage 308 enters the inside of the pressure filter frame 301 and performs wind cleaning on the elastic filter cloths 302 on both sides, and the filtrate during the pressure filtration process cannot enter the air passage 308.

[0054] The auxiliary component 4 includes an electric control sliding seat 401. A slide rail 402 is slidably connected inside the electric control sliding seat 401. Both sides of the slide rail 402 are fixedly connected to the side walls of the end seat 109. The controller 102 controls the electric control sliding seat 401 to start and can realize the sliding of the electric control sliding seat 401 on the outer surface of the slide rail 402, thereby improving the blanking and cleaning effect on the pressure filter frame 301.

[0055] At the top of the electric control sliding seat 401, there is a top seat 403. A through hole 406 is opened at the top of the top seat 403. A moving pipe 408 is hermetically and slidably connected inside the through hole 406. Then, the moving pipe 408 can continuously move up and down inside the through hole 406. Thus, not only can the amount of cleaning gas introduced into the moving pipe 408 be adjusted, but also the elastic vibration and blockage cleaning of the elastic filter cloth 302 inside the filter pressing frame 301 can be realized through the connecting ear 307.

[0056] On one side of the top seat 403, there is an air pump 404. At the bottom of the air pump 404, a plurality of splicing seats 405 are evenly arranged. The bottom of the splicing seat 405 is fixedly connected to the top of the electric control sliding seat 401. The setting of the splicing seat 405 improves the fixed support effect on the air pump 404. One side of the through hole 406 is communicated with a air supply hole 407. The output end of the air pump 404 is communicated with the air supply hole 407. When the air pump 404 is started and the output end continuously introduces cleaning gas into the air supply hole 407, the cleaning gas continuously reaches inside the through hole 406 along the air supply hole 407. The side wall of the moving pipe 408 matches the output end of the air supply hole 407. When the upward moving distance of the moving pipe 408 increases, the blocking area of the moving pipe 408 on the air supply hole 407 decreases, and the amount of cleaning gas entering the through hole 406 from the air supply hole 407 increases. Correspondingly, the amount of cleaning gas entering the moving pipe 408 from the through hole 406 increases.

[0057] At the top of the moving pipe 408, there is a movable seat 409. At the top of the movable seat 409, a plurality of pressure sensors 411 are evenly arranged. The pressure sensors 411 are used to detect the pressure value received at the top of the movable seat 409. On the top of the top seat 403, two electric control push rods 410 are symmetrically arranged. The top output end of the electric control push rod 410 is hinged to the bottom of the movable seat 409. When the controller 102 controls the electric control push rod 410 to start and the output end extends, the top output end of the electric control push rod 410 drives the movable seat 409 to move upward. The movable seat 409 drives the moving pipe 408 to move upward along the through hole 406. On the top of the movable seat 409, two inner grooves 412 are symmetrically opened. Inside the inner grooves 412, clamping plates 413 are rotatably connected through torsion springs. The clamping plates 413 can elastically rotate unidirectionally inside the inner grooves 412. The inside of the two clamping plates 413 matches the side wall of the connecting ear 307. Then, the clamping and fixing of the connecting ear 307 are realized by means of the cooperation of the two clamping plates 413. Furthermore, the filter pressing frame 301 is driven to move and perform blanking cleaning through the connecting ear 307.

[0058] The interior of the movable seat 409 is provided with a vertical hole 414. The inner cavity of the moving pipe 408 is hermetically communicated with the bottom of the vertical hole 414. The vertical hole 414 corresponds to the ventilation channel 308. The cleaning gas inside the moving pipe 408 can flow upward along the vertical hole 414. This cleaning gas continues to move upward and reaches the inside of the ventilation channel 308. And the cleaning gas inside the ventilation channel 308 continuously moves into the inside of the filter press frame 301 and realizes the reverse wind cleaning of the elastic filter cloth 302 on both sides, improving the wind cleaning and blanking effect on the elastic filter cloth 302. A filter plate 415 is hermetically and slidably connected inside the vertical hole 414. A plurality of filter holes 416 are evenly arranged inside the filter plate 415. The cleaning gas is filtered and cleaned by means of the filter holes 416 inside the filter plate 415, and the wind cleaning effect on the elastic filter cloth 302 is correspondingly improved. The positioning holes 312 and the filter holes 416 are arranged in a staggered manner. Therefore, when the filter plate 415 drives the filter holes 416 to move upward, the positioning holes 312 and the filter holes 416 are mutually staggered and impede the flow of the cleaning gas, thereby reducing the amount of gas of the cleaning gas inside the vertical hole 414 entering the inside of the ventilation channel 308, so as to realize the pulse wind cleaning of the elastic filter cloth 302 inside the filter press frame 301 by the gas inside the ventilation channel 308 and ensure the dredging property of the elastic filter cloth 302.

[0059] Side grooves 417 are symmetrically opened on both sides of the vertical hole 414. A side plate 419 is slidably connected inside the side groove 417. One side of the side plate 419 is fixedly connected to the side wall of the filter plate 415. When the side plate 419 moves up and down inside the side groove 417, it synchronously drives the filter plate 415 to move up and down. A return spring 420 is arranged at the top of the side plate 419. The top of the return spring 420 is fixedly connected to the inner top of the side groove 417. The arrangement of the return spring 420 improves the elastic return effect of the side plate 419. Two elastic plates 418 are symmetrically arranged at the bottom of the filter plate 415. The bottom of the elastic plate 418 is fixedly connected to the inner wall of the vertical hole 414. The arrangement of the elastic plate 418 ensures that the cleaning gas inside the vertical hole 414 continuously discharges upward along the filter holes 416 inside the filter plate 415, avoiding the arbitrary flow and waste of the cleaning gas. A follower rod 421 is arranged at the bottom of the side plate 419. A pressing plate 422 is arranged at the bottom of the follower rod 421. An arc-shaped block 423 is arranged at the bottom of the pressing plate 422. When the side plate 419 moves up and down, it drives the pressing plate 422 to move up and down through the follower rod 421, and the pressing plate 422 synchronously drives the arc-shaped block 423 to move up and down.

[0060] There are two transverse perforations 426 symmetrically arranged inside the movable seat 409. The top of the transverse perforation 426 is communicated with the bottom of the side groove 417. The positions of the transverse perforations 426 are all matched with the side groove 417. A long rod 425 is hermetically and slidably connected inside the transverse perforation 426. A plurality of extrusion blocks 424 are evenly arranged at the top of the long rod 425. The long rod 425 moves horizontally inside the transverse perforation 426 and drives the plurality of extrusion blocks 424 to move. The plurality of extrusion blocks 424 continuously extrude the arc-shaped block 423 and drive the arc-shaped block 423 to move up and down. The diameters of the plurality of extrusion blocks 424 are all different. This setting further improves the non-uniformity of the distance that the extrusion block 424 drives the arc-shaped block 423 to move up and down. Square plates 428 are symmetrically arranged on both sides of the long rod 425. Two grooves 427 are symmetrically arranged on the side wall of the movable seat 409. The square plates 428 are matched with the grooves 427. The square plates 428 move and drive the long rod 425 to move. A compression spring 429 is arranged on the side wall of the groove 427. The other end of the compression spring 429 is fixedly connected to the side wall of the square plate 428. The compression spring 429 is located on the outer surface of the long rod 425. The setting of the compression spring 429 further improves the elastic reset effect of the square plate 428. At the same time, the end of the square plate 428 is matched with the side wall of the connecting ear 307. The square plate 428 can be in extrusion contact with the side wall of the connecting ear 307 and drive the long rod 425 to move horizontally inside the transverse perforation 426.

[0061] When actually filtering and discharging the concentrated potassium fluoride solution, a large amount of filter cakes adhere to the side walls of the elastic filter cloth 302. If only relying on the self-gravity of the filter cakes, some filter cakes cannot be separated from the elastic filter cloth 302, which will not only reduce the recovery amount of the filter cakes, but also affect the subsequent pressure filtration of the potassium fluoride solution; at the same time, when discharging the filter cakes on the side wall of the elastic filter cloth 302, if different amounts of filter cakes adhere to different positions of the elastic filter cloth 302, different amounts of cleaning gas are required for cleaning, but the prior art lacks the function of adjusting the amount of cleaning gas, so it is impossible to achieve complete and thorough cleaning; and if the adhesion amount of the filter cakes on the side wall of the elastic filter cloth 302 is too large, only relying on the stable flow of cleaning gas cannot achieve the uniform and thorough cleaning effect of the filter cakes on the side wall of the elastic filter cloth 302, and the filtration quality of the elastic filter cloth 302 will be reduced; and when the filter plate 415 above the electric control sliding seat 401 is used to filter the cleaning gas for a long time, some dust impurities are easily blocked inside the filter plate 415, which will reduce the quality of the subsequent cleaning gas and ultimately affect the air blowing and clogging removal effect on the elastic filter cloth 302.

[0062] During actual use, first, the controller 102 controls the hydraulic push rod 201 to start and drives the sealing plate 202 to move towards the end of the feed pipe 204. When the sealing plate 202 is squeezed by the end filter pressing frame 301, it drives multiple filter pressing frames 301 to squeeze each other and contact the fixed plate 107. Multiple middle through pipes 304 and circulation pipes 305 are all interconnected. Then, the concentrated potassium fluoride solution is introduced into the interior of the middle through pipe 304 along the feed pipe 204. The solid raw materials in the potassium fluoride solution are continuously squeezed against the side walls of the elastic filter cloth 302 between the connected filter pressing frames 301 to form filter cakes, while the liquid raw materials in the potassium fluoride solution continuously enter the interior of the drain pipe 205 through the docking holes 306 to form filtrate, and finally are discharged along the drain pipe 205 for recovery.

[0063] When the filtration of the concentrated potassium fluoride solution is completed, the controller 102 controls the hydraulic push rod 201 to move in the reverse direction and drives the sealing plate 202 to move away from the end of the feed pipe 204 to the maximum distance. At the same time, the electric control slide 401 starts and continuously moves along the slide rail 402 to the lower part of the filter pressing frame 301. When the clamping plate 413 moves to one side of the connecting ear 307, the thrust exerted by the connecting ear 307 on the side wall of the clamping plate 413 causes the clamping plate 413 to hinge and rotate inside the inner groove 412 and cross over the connecting ear 307. Then, the connecting ear 307 is clamped between the two clamping plates 413, and the vertical hole 414 is connected to the air passage 308, and the filter plate 415 corresponds to the matching plate 311.

[0064] The controller 102 controls multiple electric control push rods 410 to start and drive the movable seat 409 to move upward to the initial position. The movable seat 409 drives the movable pipe 408 to move upward to the initial position. The movable pipe 408 no longer completely blocks the air supply holes 407. At the same time, when the movable seat 409 moves upward, it synchronously drives the connecting ear 307 to move upward. The connecting ear 307 drives the filter pressing frame 301 to move upward. The clamping groove 310 disengages from the top of the sliding frame 108, and the pressure sensor 411 detects the pressure value.

[0065] At the same time, the controller 102 controls the air pump 404 to start and introduce clean gas into the air supply holes 407. The clean gas enters the through holes 406 along the air supply holes 407 and continues to move upward along the through holes 406 to reach the interior of the movable pipe 408. The clean gas inside the movable pipe 408 enters the air passage 308 along the vertical hole 414. When the clean gas passes through the filter holes 416 inside the filter plate 415 and the positioning holes 312 inside the matching plate 311, it is fully filtered and cleaned. Then, the clean gas enters the interior of the filter pressing frame 301 along the air passage 308 and is discharged to both sides along the interior of the filter pressing frame 301, thereby realizing the reverse wind cleaning of the elastic filter cloth 302, with higher cleaning efficiency and better effect of clearing blockages and discharging materials.

[0066] After that, the controller 102 controls the electric control sliding seat 401 to move in the reverse direction. The electric control sliding seat 401 drives the upper movable seat 409 to move in the reverse direction. The movable seat 409 drives a plurality of filter pressing frames 301 to move away from the feeding pipe 204 end in sequence through the clamping plate 413. The adjacent filter pressing frames 301 are separated from each other. The filter cake located between the two filter pressing frames 301 falls downward under its own weight to above the blanking plate 104 for recovery, thereby realizing the recovery treatment of the filter cake.

[0067] When the pressure values detected by the plurality of pressure sensors 411 are all equal and greater than the set pressure preset value, it indicates that the filter cake still adheres to both sides of the elastic filter cloth 302 at this time. However, with the wind cleaning of the filter cake adhered to the side wall of the elastic filter cloth 302 by the cleaning gas, the pressure values detected by the pressure sensors 411 continuously decrease. Then, the controller 102 controls the output end of the electric control push rod 410 to extend a smaller distance. The electric control push rod 410 drives the movable seat 409 to move downward continuously. The movable seat 409 drives the moving pipe 408 to move downward continuously. The blocking area of the air supply hole 407 by the moving pipe 408 increases. The amount of cleaning gas entering the through hole 406 from the air supply hole 407 decreases. Then, the amount of cleaning gas entering the filter pressing frame 301 through the through hole 406, the moving pipe 408, the vertical hole 414, and the air passage 308 decreases, thereby ensuring controllable wind cleaning and blocking of the elastic filter cloth 302 and further ensuring the filter pressing effect of the elastic filter cloth 302 on the subsequent concentrated potassium fluoride solution.

[0068] When the pressure values detected by the plurality of pressure sensors 411 are not equal, it indicates that the filter cake distribution on the side wall of the elastic filter cloth 302 is uneven at this time. Then, the controller 102 correspondingly controls the output end of the electric control push rod 410 on the side where the pressure value detected by the pressure sensor 411 increases to extend. The electric control push rod 410 drives the movable seat 409 to move upward. The movable seat 409 drives the connecting ear 307 on this side of the filter pressing frame 301 to move upward. The movable seat 409 drives the moving pipe 408 to move upward inside the through hole 406. The blocking area of the air supply hole 407 by the moving pipe 408 decreases. Then, the amount of cleaning gas entering the filter pressing frame 301 upward from the air supply hole 407 increases. And the controller 102 controls the output end of the electric control push rod 410 on the side where the pressure value detected by the pressure sensor 411 decreases to shorten. Then, the electric control push rod 410 drives the movable seat 409 to move downward. The movable seat 409 drives the connecting ear 307 on this side of the filter pressing frame 301 to move downward. And the movable seat 409 drives the moving pipe 408 to move downward along the through hole 406. The amount of cleaning gas entering the filter pressing frame 301 from the air supply hole 407 through the through hole 406, the moving pipe 408, and the air passage 308 decreases. Then, the filter pressing frame 301 tilts and shakes unevenly between the two sliding frames 108, and cooperates with the uneven flow of the cleaning gas inside the filter pressing frame 301 to correspondingly improve the high-efficiency cleaning and blocking effect of the filter cake adhered to the side wall of the elastic filter cloth 302.

[0069] When the movable seat 409 above the electric control sliding seat 401 drives the connecting ear 307 to move to the other end, if the pressure value detected by the pressure sensor 411 is still greater than the set pressure preset value, it indicates that there is still some filter cake remaining on the side wall of the elastic filter cloth 302. And the stable clean gas introduced into the air passage 308 cannot thoroughly and effectively clean the filter cake remaining on the side wall of the elastic filter cloth 302 by wind power. Therefore, the controller 102 controls the output end of the electric control push rod 410 to extend to the maximum distance. The electric control push rod 410 drives the movable seat 409 at the top to move upward to the maximum distance. The movable seat 409 drives the connecting ear 307 and the internal filter pressing frame 301 to move upward to the maximum distance. The movable seat 409 drives the moving pipe 408 to move upward to the maximum distance. The blocking area of the moving pipe 408 for the air supply hole 407 reaches the minimum value.

[0070] Then, after the air pump 404 is started, the amount of clean gas inside the air supply hole 407 entering the inside of the filter pressing frame 301 through the through hole 406, the moving pipe 408, and the air passage 308 reaches the maximum value. Thus, it improves the thorough and effective wind power cleaning of the filter cake adhered to the side wall of the elastic filter cloth 302. At the same time, when the movable seat 409 moves, it drives the square plate 428 to move synchronously. The square plate 428 squeezes and contacts the side wall of another connecting ear 307. Then the square plate 428 squeezes the compression spring 429 and drives the long rod 425 to move along the horizontal through hole 426. The long rod 425 drives a plurality of extrusion blocks 424 to move synchronously. When the extrusion blocks 424 continuously squeeze and contact the arc-shaped blocks 423 as they move with the long rod 425, the arc-shaped blocks 423 are driven by the extrusion blocks 424 to drive the pressing plate 422 to move upward along the side groove 417. The pressing plate 422 drives the side plate 419 to squeeze the return spring 420 and move upward through the follower rod 421.

[0071] And the side plate 419 drives the filter plate 415 to move upward. The upper half of the filter plate 415 continuously moves upward into the air passage 308 along the vertical hole 414. Then the distance between the filter plate 415 and the matching plate 311 continuously decreases. And with the misaligned distribution of the positioning hole 312 and the filter hole 416, the amount of clean gas inside the vertical hole 414 entering the air passage 308 along the filter hole 416 and the positioning hole 312 continuously decreases. The amount of clean gas inside the air passage 308 entering the inside of the filter pressing frame 301 along the one-way valve 309 continuously decreases. At the same time, when the long rod 425 continues to drive a plurality of extrusion blocks 424 to move, the extrusion blocks 424 are separated from the arc-shaped blocks 423. Then, under the elastic force of the return spring 420, it drives the side plate 419 to move downward to return to the original position. The side plate 419 drives the filter plate 415 to move downward to return to the original position. Then the amount of clean gas inside the vertical hole 414 entering the air passage 308 along the filter hole 416 and the positioning hole 312 increases. The amount of gas that the air passage 308 enters the inside of the filter pressing frame 301 along the one-way valve 309 increases.

[0072] Therefore, under the continuous extrusion and contact action of a plurality of extrusion blocks 424 with unequal diameters and the arc-shaped blocks 423, the distance between the filter plate 415 and the matching plate 311 continuously changes, and the amount of cleaning gas inside the vertical holes 414 entering the inside of the filter press frame 301 along the air passage 308 continuously changes. Furthermore, the pulse air cleaning of the elastic filter cloth 302 is realized, effectively improving the cleaning and dredging effect of the filter cake adhered to the side wall of the elastic filter cloth 302, with stronger passability and higher controllability.

[0073] Moreover, when the filter plate 415 continuously reciprocates inside the vertical holes 414 and the air passage 308, the filter plate 415 and the elastic plate 418 are elastically deformed by continuous stretching. Therefore, the cleaning gas inside the vertical holes 414 can still stably enter the inside of the air passage 308. The filter plate 415 continuously collides with the matching plate 311 by extrusion. The matching plate 311 transmits this collision to the connecting ear 307 end, and the connecting ear 307 transmits this collision to the filter press frame 301 end. Furthermore, the continuous vibration cleaning of the filter press frame 301 is realized, and in cooperation with the reciprocating circulation of the cleaning gas inside the filter press frame 301, the cleaning effect of the filter cake adhered to the side wall of the elastic filter cloth 302 is further improved. At the same time, this cleaning gas can continuously flow inside the flow pipe 305 along the docking hole 306 and flow through the middle through pipe 304, thereby improving the complete and thorough cleaning of the internal structure of the filter press frame 301.

[0074] When the vibration cleaning of the filter press frame 301 is completed, the pressure values detected by a plurality of pressure sensors 411 all decrease to the set preset value. At this time, the controller 102 controls the output end of the electric control push rod 410 to reach the minimum value. Then, the electric control push rod 410 drives the movable seat 409 to move downward to the minimum value. The movable seat 409 drives the upper connecting ear 307 to move downward to the minimum value. The clamping groove 310 at the bottom of the connecting ear 307 is clamped with the sliding frame 108. After that, the controller 102 controls the electric control slide seat 401 to move in the reverse direction and unloads the subsequent filter press frame 301.

[0075] When the electric control push rod 410 drives the movable seat 409 to move to the side wall of the subsequent filter pressing frame 301 close to the feeding pipe 204, the controller 102 controls the electric control push rod 410 to start and the output end extends to the maximum value. The electric control push rod 410 drives the movable seat 409 to move upward to the maximum distance. The movable seat 409 drives the movable pipe 408 to move upward along the through hole 406 to the maximum distance. The air pump 404 starts and injects clean gas into the air supply hole 407. The amount of clean gas continuously entering the inside of the filter pressing frame 301 along the through hole 406, the movable pipe 408, the vertical hole 414 and the air passage 308 reaches the maximum value. The square plate 428 on the other side of the movable seat 409 is in mutual extrusion contact with the side wall of the subsequent connecting ear 307. The square plate 428 drives a plurality of extrusion blocks 424 to move inside the horizontal through hole 426 through the long rod 425. The extrusion blocks 424 continuously extrude and push the arc-shaped blocks 423. Then the arc-shaped blocks 423 drive the side plates 419 to move up and down inside the side grooves 417 through the pressing plates 422 and the follower rods 421. The side plates 419 drive the filter plates 415 to move up and down inside the side grooves 417. The filter plates 415 drive a plurality of filter holes 416 to move up and down synchronously and vibrate and clean the blocked dust and impurities inside, further improving the clogging removal effect on the filter holes 416, with stronger dredging property and better cleaning property.

[0076] After the clogging of the filter holes 416 inside the filter plate 415 is completed, the controller 102 controls the electric control push rod 410 to shorten to the minimum value. The electric control push rod 410 drives the movable seat 409 to move downward to the minimum value, and moves and vibrates and clears the blockage of the subsequent filter pressing frame 301 according to the above process, thereby improving the blanking effect of the filter cake adhered to the side walls of the plurality of filter pressing frames 301. After the blanking of all the plurality of filter pressing frames 301 is completed, the discharging push rod 105 is started and drives the rotating rods 103 on both sides to rotate in the reverse direction. The rotating rods 103 drive the blanking plate 104 to rotate and open each other. The filter cake above the blanking plate 104 falls downward for recovery. During the above process, the above process is continuously repeated and the subsequent concentrated potassium fluoride solution is filtered and recovered.

[0077] The pressure filtration device for concentrated potassium fluoride has high pressure filtration efficiency and good pressure filtration effect, meeting the high-efficiency pressure filtration requirements for the concentrated potassium fluoride solution. It is simple to operate, safe and stable, with high regulation efficiency and high adjustment accuracy, ensuring the large-scale pressure filtration requirements for potassium fluoride. At the same time, after the pressure filtration is completed, the amount of gas entering the air passage 308 through the vertical holes 414 is adjusted according to the amount of filter cake adhered to the side wall of the elastic filter cloth 302, effectively improving the self-adaptive air cleaning effect on the elastic filter cloth 302 inside the pressure filtration frame 301, with stronger dredging property and higher regulation accuracy. When the pressure filtration frame 301 moves reversely to the end, since the vertical holes 414 and the air passage 308 are aligned, the square plate 428 and the connecting ear 307 squeeze and collide with each other, driving part of the filter plate 415 to enter the air passage 308 through the vertical holes 414 and move up and down, thereby adjusting the distance between the filter plate 415 and the matching plate 311, correspondingly realizing the pulsed flow of the clean gas inside the vertical holes 414 entering the pressure filtration frame 301 along the air passage 308, and cooperating with the vibration of the pressure filtration frame 301 itself to improve the detachment effect on the filter cake with a large amount adhered to the side wall of the elastic filter cloth 302. After the blockage is cleared, the square plate 428 and another connecting ear 307 squeeze and collide, so that the filter plate 415 vibrates up and down inside the vertical holes 414, and cooperating with the flow of the clean gas inside the vertical holes 414, efficiently realizing the blockage clearing effect on the multiple filter holes 416 inside the filter plate 415, ensuring the subsequent dredging and cleaning effect on the elastic filter cloth 302 inside the pressure filtration frame 301.

[0078] Example Two

[0079] The application of the pressure filtration device for concentrated potassium fluoride in the production process of potassium fluoride is as follows:

[0080] S1. The concentrated potassium fluoride solution is introduced into the pressure filtration frame 301, and the elastic filter cloth 302 performs pressure filtration on the concentrated potassium fluoride solution.

[0081] S2. After the pressure filtration is completed, the movable seat 409 drives the pressure filtration frame 301 to move reversely. When the pressure value detected by the pressure sensor 411 increases, the movable seat 409 moves upward and drives the movable pipe 408 to move upward. The blocking area of the air supply hole 407 by the movable pipe 408 decreases, and the amount of clean gas inside the air supply hole 407 entering the pressure filtration frame 301 through the through hole 406, the movable pipe 408, the vertical holes 414 and the air passage 308 increases, and the wind force exerted on the two-side elastic filter cloth 302 by the clean gas inside the pressure filtration frame 301 increases.

[0082] S3. When the filter press frame 301 moves reversely to the end, if the pressure value detected by the pressure sensor 411 is still greater than the set pressure preset value, the movable seat 409 moves upward to the maximum distance, and the side plate 419 drives the filter plate 415 to move up and down partially inside the vertical hole 414 and the ventilation channel 308. The amount of cleaning gas inside the vertical hole 414 entering the inside of the filter press frame 301 along the ventilation channel 308 changes continuously. The filter press frame 301 vibrates and cooperates with the flowing pulse wind force to clear the blockages on both sides of the elastic filter cloth 302.

[0083] S4. After the blockages on the elastic filter cloth 302 inside the filter press frame 301 are cleared, the electric control sliding seat 401 drives the movable seat 409 to move reversely to the end of the subsequent filter press frame 301. The movable seat 409 moves upward to the maximum distance, and the side plate 419 drives the filter plate 415 to vibrate up and down inside the vertical hole 414 and cooperate with the cleaning gas flowing inside the vertical hole 414 to clear its own blockages.

[0084] By further limiting the filter pressing method, the filter pressing efficiency is improved, the filter pressing quality is ensured, and at the same time, the effect of clearing the blockages on the side wall of the elastic filter cloth 302 is improved.

[0085] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0086] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A filter press device after potassium fluoride concentration, comprising a support assembly (1), characterized in that: A driving assembly (2) is provided on one side of the support assembly (1), a plurality of filter assemblies (3) are evenly arranged inside the support assembly (1), and two auxiliary assemblies (4) are symmetrically arranged above the support assembly (1); The support assembly (1) comprises two mounting frames (101), each of the mounting frames (101) being provided with a fixing plate (107) on the top, two end seats (109) being symmetrically provided on the front and rear sides of the fixing plate (107), and two sliding frames (108) being symmetrically provided between the four end seats (109) and on the front and rear sides of the mounting frames (101); The drive assembly (2) comprises a sealing plate (202); The filter assembly (3) comprises a filter press frame (301), two elastic filter cloths (302) are symmetrically arranged inside the filter press frame (301), two connecting ears (307) are symmetrically arranged on both sides of the filter press frame (301), an air duct (308) is arranged inside the connecting ears (307), and a matching plate (311) is arranged inside the air duct (308); The auxiliary component (4) comprises an electrically controlled sliding seat (401), a top seat (403) is provided on the top of the electrically controlled sliding seat (401), an air pump (404) is provided on one side of the top seat (403), a through hole (406) is provided on the top of the top seat (403), one side of the through hole (406) is connected to an air supply hole (407), a movable tube (408) is sealed and slidably connected inside the through hole (406), a movable seat (409) is provided on the top of the movable tube (408), a plurality of pressure sensors (411) are evenly provided on the top of the movable seat (409), a vertical hole (414) is provided inside the movable seat (409), a filter plate (415) is sealed and slidably connected inside the vertical hole (414), side grooves (417) are symmetrically provided on both sides of the vertical hole (414), and a side plate (419) is slidably connected inside the side groove (417); An intermediate plate (303) is provided at the center of the filter press frame (301), the elastic filter cloths (302) are located on both sides of the intermediate plate (303), one end of the air duct (308) close to the filter press frame (301) is connected to the inside of the filter press frame (301), and the output end of the air duct (308) is located between the two elastic filter cloths (302); Two electrically controlled push rods (410) are symmetrically arranged on the top of the top seat (403); the inner cavity of the movable tube (408) is sealed and connected to the bottom of the vertical hole (414); the pressure sensor (411) is used to detect the pressure value on the top of the movable seat (409); two inner grooves (412) are symmetrically arranged on the top of the movable seat (409); the interiors of the inner grooves (412) are rotatably connected to clamping plates (413) via torsion springs; the interiors of the two clamping plates (413) match the side walls of the connecting ears (307).

2. The filter press device after potassium fluoride concentration according to claim 1, characterized in that: Two rotating rods (103) are symmetrically rotatably connected to both sides of the mounting frame (101) via bearings; a material discharge plate (104) is rotatably connected to the outer surface of the rotating rod (103); a material discharge push rod (105) is movably hinged to the outer surface of the two rotating rods (103); a plurality of reinforcing feet (106) are symmetrically provided on one side of the two sliding frames (108); a controller (102) is provided on one side of the end seat (109); and the controller (102) electrically controls each electrical component.

3. The filter press device after potassium fluoride concentration according to claim 1, characterized in that: A hydraulic push rod (201) is provided on one side of the fixed plate (107), the output end of the hydraulic push rod (201) passes through the fixed plate (107) and is fixedly connected to the side wall of the sealing plate (202), the side wall of the sealing plate (202) matches the side wall of the filter press frame (301), sliding wheels (203) are symmetrically provided on both sides of the sealing plate (202), the bottom of the sliding wheel (203) is slidably connected to the top of the sliding frame (108), a feed pipe (204) is provided at the center of one side of the fixed plate (107), and a plurality of drainage pipes (205) are evenly provided on one side of the fixed plate (107).

4. The filter press device after potassium fluoride concentration according to claim 3, characterized in that: A central through pipe (304) is provided at the central axis of the elastic filter cloth (302) and the middle plate (303); a plurality of circulation pipes (305) are evenly provided inside the filter press frame (301); the output end of the feed pipe (204) is connected to the central through pipe (304); the output ends of the plurality of drainage pipes (205) are connected to the circulation pipe (305); and one side of the circulation pipe (305) is connected to the inside of the filter press frame (301) through a docking hole (306).

5. The filter press device after potassium fluoride concentration according to claim 1, characterized in that: A one-way valve (309) is provided at the end of the air passage (308), and the ventilation direction of the one-way valve (309) is from the matching plate (311) to the inside of the filter press frame (301). The bottom of each of the connecting ears (307) is provided with a clamping groove (310), and the inside of the clamping groove (310) is mutually clamped with the top of the sliding frame (108). A plurality of positioning holes (312) are evenly provided inside the matching plate (311), and a plurality of filter holes (416) are evenly provided inside the filter plate (415), and the positioning holes (312) and the filter holes (416) are staggered.

6. The filter press device after potassium fluoride concentration according to claim 1, characterized in that: The electric control slide seat (401) is internally slidably connected to a slide rail (402), and both sides of the slide rail (402) are fixedly connected to the side walls of the end seat (109). The bottom of the air pump (404) is evenly provided with a plurality of splicing seats (405), and the bottom of the splicing seat (405) is fixedly connected to the top of the electric control slide seat (401). The output end of the air pump (404) is connected to the air supply hole (407), and the side wall of the moving tube (408) matches the output end of the air supply hole (407).

7. The filter press device after potassium fluoride concentration according to claim 1, characterized in that: The top output end of the electric control push rod (410) is hinged to the bottom of the movable seat (409).

8. The filter press device after potassium fluoride concentration according to claim 1, characterized in that: The vertical hole (414) corresponds to the air passage (308); one side of the side plate (419) is fixedly connected to the side wall of the filter plate (415); a return spring (420) is provided at the top of the side plate (419); the top of the return spring (420) is fixedly connected to the inner top of the side groove (417); two elastic plates (418) are symmetrically provided at the bottom of the filter plate (415); the bottom of the elastic plates (418) is fixedly connected to the inner wall of the vertical hole (414); a follower rod (421) is provided at the bottom of the side plate (419); a pressure plate (422) is provided at the bottom of the follower rod (421); and an arc block (423) is provided at the bottom of the pressure plate (422).

9. The filter press device after potassium fluoride concentration according to claim 1, characterized in that: Two transverse holes (426) are symmetrically arranged inside the movable seat (409), the top of the transverse hole (426) is connected to the bottom of the side groove (417), and a long rod (425) is sealed and slidably connected inside the transverse hole (426). A plurality of extrusion blocks (424) are evenly arranged on the top of the long rod (425), and the diameters of the plurality of extrusion blocks (424) are different. Square plates (428) are symmetrically arranged on both sides of the long rod (425), and two grooves (427) are symmetrically arranged on the side wall of the movable seat (409), and the square plates (428) match the grooves (427). A compression spring (429) is arranged on the side wall of the groove (427), and the other end of the compression spring (429) is fixedly connected to the side wall of the square plate (428). The compression spring (429) is located on the outer surface of the long rod (425), and the end of the square plate (428) matches the side wall of the connecting ear (307).

10. Use of the filter press device after potassium fluoride concentration as claimed in claim 1 in the production process of potassium fluoride, characterized in that: The following steps are involved: S1, a concentrated potassium fluoride solution is introduced into the filter press frame (301), and the elastic filter cloth (302) performs filter press on the concentrated potassium fluoride solution; S2. When the filtration is completed, the movable seat (409) drives the filter press frame (301) to move in the opposite direction. When the pressure value detected by the pressure sensor (411) increases, the movable seat (409) moves upward and drives the movable tube (408) to move upward. The blocking area of ​​the air supply hole (407) by the movable tube (408) decreases. The amount of clean gas inside the air supply hole (407) entering the filter press frame (301) along the through hole (406), the movable tube (408), the vertical hole (414) and the air passage (308) increases. The wind force exerted by the clean gas inside the filter press frame (301) on the elastic filter cloths (302) on both sides increases. S3, when the filter press frame (301) moves in the reverse direction to the end, the pressure value detected by the pressure sensor (411) is still greater than the preset pressure value, the movable seat (409) moves upward to the maximum distance, the side plate (419) drives part of the filter plate (415) to move up and down along the vertical hole (414) inside the air passage (308), the amount of clean gas inside the vertical hole (414) entering the filter press frame (301) along the air passage (308) changes continuously, and the filter press frame (301) vibrates and cooperates with the pulse wind force of the flow to clear the blockage on both sides of the elastic filter cloth (302); S4. After the elastic filter cloth (302) inside the filter press frame (301) is cleared, the electrically controlled sliding seat (401) drives the movable seat (409) to move in the opposite direction to the end of the subsequent filter press frame (301), the movable seat (409) moves upward to the maximum distance, and the side plate (419) drives the filter plate (415) to vibrate up and down inside the vertical hole (414) and cooperate with the clean gas flowing inside the vertical hole (414) to clear itself.

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