Filter pressing device used after potassium fluoride concentration and application of filter pressing device in potassium fluoride production process

Abstract

The invention belongs to the technical field of filter pressing devices, and particularly relates to a filter pressing device used after potassium fluoride concentration and application of the filter pressing device in the potassium fluoride production process. Comprising a supporting assembly, a driving assembly is arranged on one side of the supporting assembly, a plurality of filtering assemblies are evenly arranged in the supporting assembly, and two auxiliary assemblies are symmetrically arranged above the supporting assembly; the supporting assembly comprises two mounting frames, fixing plates are arranged at the tops of the mounting frames, two end seats are symmetrically arranged on the two sides of each fixing plate, and two sliding frames are symmetrically arranged between the two end seats; the driving assembly comprises a sealing plate; the filter assembly comprises a filter pressing frame, and two pieces of elastic filter cloth are symmetrically arranged in the filter pressing frame; the filter pressing device after potassium fluoride concentration is high in filter pressing efficiency, good in filter pressing effect, simple to operate, safe, stable, high in regulation and control efficiency and high in regulation precision, meets the efficient filter pressing requirement of a concentrated potassium fluoride solution, and ensures the large-batch filter pressing requirement of potassium fluoride.

Description

Technical Field

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

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

[0003] Chinese invention patent CN111320351A discloses a filter cloth cleaning device for a plate and frame filter press for cleaning multiple filter cloths simultaneously, comprising a moving track for the cleaning device and lifting auxiliary materials, lifting auxiliary materials are fixedly installed at both ends of the moving track for the cleaning device, a main row frame is fixedly installed on one side of the top of the moving track for the cleaning device, a lifting motor is fixedly installed on one side of the top of the main row frame, and a support body is fixedly installed on the output end of the lifting motor; the filter press has low filtration efficiency and poor filtration effect.

[0004] Chinese invention patent CN119113602A discloses a self-cleaning plate filter press for mother liquor purification in the field of filtering equipment, comprising a frame and an extrusion assembly, wherein the frame comprises two parallel guide rails, the extrusion assembly comprises a plurality of filter plates located between the two guide rails, and the filter press also comprises a shaking mechanism and a flushing mechanism; the filter press is difficult to operate and has low operating accuracy.

[0005] When the concentrated potassium fluoride solution is actually filtered and discharged, a large amount of filter cake is likely to stick to the inside of the filter press frame. If part of the filter cake cannot be separated from the filter press frame due to its own gravity, it will not only reduce the amount of filter cake recovered, but also affect the subsequent filtration of the potassium fluoride solution.

[0006] At the same time, when the filter cake on the side wall of the filter press frame is unloaded, if different amounts of filter cake are adhered to different positions of the filter press frame, different amounts of wind cleaning are required. However, the prior art lacks the function of regulating the amount of clean gas, and thus cannot achieve complete and thorough cleaning. If the amount of filter cake adhered to the side wall of the filter press frame is too large, the stable circulation of clean gas alone cannot achieve a uniform and thorough cleaning effect on the filter cake on the side wall of the filter press frame, and the filtration quality of the filter press frame is reduced.

[0007] When the filter plate is used for filtering clean gas for a long time, dust and impurities are easily blocked inside the filter plate, which will reduce the quality of subsequent clean gas and ultimately affect the wind clearing effect of the filter press frame. Summary of the invention

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

[0009] To achieve the above object, the present invention provides the following technical solution: a filter press device after potassium fluoride concentration, comprising a support assembly, a driving assembly is provided on one side of the support assembly, a plurality of filter assemblies are evenly provided inside the support assembly, and two auxiliary assemblies are symmetrically provided above the support assembly; The support assembly includes two mounting frames, each of which has a fixing plate on the top, two end seats symmetrically arranged on the front and rear sides of the fixing plate, and two sliding frames symmetrically arranged between the four end seats and on the front and rear sides of the mounting frame; The drive assembly includes a sealing plate; The filter assembly comprises a filter press frame, two elastic filter cloths are symmetrically arranged inside the filter press frame, two connecting ears are symmetrically arranged on both sides of the filter press frame, air ducts are arranged inside the connecting ears, and matching plates are arranged inside the air ducts; The auxiliary component includes an electrically controlled slide seat, a top seat is provided on the top of the electrically controlled slide seat, a through hole is opened on the top of the top seat, one side of the through hole is connected to an air supply hole, a movable tube is sealed and slidably connected inside the through hole, a movable seat is provided on the top of the movable tube, a plurality of pressure sensors are evenly arranged on the top of the movable seat, a vertical hole is opened inside the movable seat, a filter plate is sealed and 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.

[0010] In the present application, after the concentrated potassium fluoride solution is filtered, the movable seat is fixedly connected to the connecting ear. When the pressure value detected by the pressure sensor increases, it means that there is a large amount of filter cake on the side wall of the elastic filter cloth inside the filter press frame. Then the movable seat drives the movable tube to move upward, and the blockage of the air supply hole by the movable tube is reduced, and the amount of clean gas entering the air duct 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 with the matching plate. The amount of gas discharged from the air duct continuously changes in pulses and cooperates with the vibration of the filter press frame to realize efficient vibration pulse cleaning of the filter cake adhered to the side wall of the elastic filter cloth; after the blockage is completed, the side plate continues to drive the filter plate to vibrate up and down and realizes its own blockage.

[0011] Preferably, two rotating rods are symmetrically rotatably connected to both sides of the mounting frame through bearings, the outer surfaces of the rotating rods are rotatably connected to unloading plates, the outer surfaces of the two rotating rods are movably hinged with unloading push rods, one side of the two sliding frames is symmetrically provided with multiple reinforcing feet, and one side of the end seat is provided with a controller, and the controller electrically controls each electrical component.

[0012] Preferably, a hydraulic push rod is provided 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 provided 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 provided at the center of one side of the fixed plate, and a plurality of drainage pipes are evenly provided on one side of the fixed plate.

[0013] Preferably, an intermediate plate is provided at the center of the filter press frame, the elastic filter cloth is located on both sides of the intermediate plate, a central through pipe is provided at the central axis of the elastic filter cloth and the intermediate plate, a plurality of flow pipes are evenly provided inside the filter press frame, the output end of the feed pipe is connected to the central through pipe, the output ends of the plurality of drainage pipes are connected to the flow pipe, and one side of the flow pipe is connected to the inside of the filter press frame through a docking hole.

[0014] Preferably, one end of the air duct close to the filter press frame is connected to the interior of the filter press frame, the output end of the air duct is located between two elastic filter cloths, a one-way valve is provided at the end of the air duct, the ventilation direction of the one-way valve is along the matching plate to the interior of the filter press frame, the bottom of the connecting ear is provided with a snap-in groove, the interior of the snap-in groove is snap-fitted with the top of the sliding frame, a plurality of positioning holes are evenly provided inside the matching plate, a plurality of filter holes are evenly provided inside the filter plate, and the positioning holes and the filter holes are staggered.

[0015] Preferably, the electric control slide seat is internally slidably connected with a slide rail, both sides of the slide rail are fixedly connected to the side walls of the end seat, an air pump is provided on one side of the top seat, a plurality of splicing seats are evenly provided on 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 connected to the air supply hole, and the side wall of the movable tube matches the output end of the air supply hole.

[0016] Preferably, two electrically controlled push rods are symmetrically provided on the top of the top seat, the top output ends of the electrically controlled push rods are hinged to each other with the bottom of the movable seat, the inner cavity of the movable tube is sealed and connected to the bottom of the vertical hole, the pressure sensor is used to detect the pressure value exerted on the top of the movable seat, and two inner grooves are symmetrically provided on the top of the movable seat, the interiors of the inner grooves are rotatably connected with clamping plates through torsion springs, and the interiors of the two clamping plates match the side walls of the connecting ears.

[0017] Preferably, the vertical hole corresponds to the air duct, 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, 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, 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 pressure plate is provided at the bottom of the follower rod, and an arc block is provided at the bottom of the pressure plate.

[0018] Preferably, two transverse holes are symmetrically provided inside the movable seat, the top of the transverse hole is connected to the bottom of the side groove, the inside of the transverse hole is sealed and slidably connected with a long rod, a plurality of extrusion blocks are evenly provided on the top of the long rod, the diameters of the plurality of extrusion blocks are 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 plates match the grooves, a compression spring is provided on the side wall of the groove, 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.

[0019] The application of the filter press device after the potassium fluoride is concentrated in the potassium fluoride production process comprises the following steps: S1, the concentrated potassium fluoride solution is introduced into the filter press frame, and the elastic filter cloth performs filter pressing on the concentrated potassium fluoride solution; S2. When the filter press is completed, the movable seat drives the filter press frame to move in the opposite direction. When the pressure value detected by the pressure sensor increases, the movable seat moves upward and drives the movable tube to move upward. The blocking area of ​​the air supply hole by the movable tube decreases. The amount of clean gas inside the air supply hole entering the filter press frame along the through hole, the movable tube, the movable tube, the vertical hole and the airway increases. The wind force exerted by the clean gas inside the filter press frame on the elastic filter cloths on both sides increases. S3, when the filter press frame moves in the reverse direction to the end, the pressure value detected by the pressure sensor is still greater than the preset pressure value, the movable seat moves upward to the maximum distance, the side plate drives the filter plate to move up and down inside the vertical hole and the air passage, the amount of clean gas inside the vertical hole entering the filter press frame along the air passage changes continuously, the filter press frame vibrates and cooperates with the pulse wind force of the flow to clear the blockage on both sides of the elastic filter cloth; S4. After the elastic filter cloth inside the filter press frame is cleared, the electrically controlled slide seat drives the movable seat to move in the opposite direction, and the movable seat moves upward to the maximum distance. The side plate drives the filter plate to vibrate up and down inside the vertical hole and cooperates with the clean gas flowing inside the vertical hole to clear itself.

[0020] Compared with the prior art, the present invention has the following beneficial effects: 1. In the present invention, the filter press device after the potassium fluoride is concentrated has high filter press efficiency and good filter press effect, which meets the demand for high-efficiency filter press of the concentrated potassium fluoride solution, is simple to operate, safe and stable, and has high control efficiency and high adjustment accuracy, thus ensuring the large-scale filter press demand of potassium fluoride.

[0021] 2. In the present invention, after the filtration is completed, the filter press device after potassium fluoride concentration adjusts the amount of gas entering the airway through the vertical holes according to the amount of filter cake adhered to the side wall of the elastic filter cloth, thereby effectively improving the adaptive wind force clearing effect of the elastic filter cloth inside the filter press frame, with stronger dredging performance and higher control accuracy.

[0022] 3. In the present invention, when the filter press frame moves in the reverse direction to the end, the square plate and the connecting ear squeeze and collide with each other and drive the filter plate to move up and down inside the vertical hole and the air duct, thereby adjusting the distance between the filter cake and the matching plate, correspondingly realizing the pulse flow of the clean gas inside the vertical hole along the air duct into the filter press frame, and cooperating with the vibration of the filter press frame itself to improve the separation effect of the filter cake with a large adhesion to the side wall of the elastic filter cloth.

[0023] 4. In the present invention, after the clearing is completed, the square plate is squeezed and collided with another connecting ear, so that the filter plate can vibrate up and down inside the vertical hole, and cooperate with the flow of clean gas inside the vertical hole to efficiently achieve the clearing effect of multiple filter holes inside the filter plate, thereby ensuring the subsequent dredging and cleaning effect of the elastic filter cloth inside the filter press frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of the three-dimensional structure from another viewing angle of the present invention; Figure 3 It is a schematic diagram of the internal three-dimensional structure of the present invention; Figure 4 It is a schematic diagram of the three-dimensional structure of the filter assembly of the present invention; Figure 5 It is a right-side perspective structural diagram of the filter assembly of the present invention; Figure 6 It is a schematic diagram of the three-dimensional structure of the filter assembly of the present invention from top view; Figure 7 for Figure 6 The enlarged schematic diagram at A in the middle; Figure 8 It is a schematic diagram of the three-dimensional structure of the auxiliary component of the present invention; Fig. 9 It is a schematic diagram of the internal three-dimensional structure of the auxiliary component of the present invention from the right side; Fig.10 for Fig. 9 The enlarged schematic diagram of point B in the middle; Fig.11This is a schematic diagram of the internal three-dimensional structure of the auxiliary component of the present invention; Fig.12 for Fig.11 Enlarged schematic diagram at point C in the middle.

[0025] In the figure: 1. Support assembly; 101. Mounting frame; 102. Controller; 103. Rotating rod; 104. Unloading plate; 105. Unloading push rod; 106. Reinforcement foot; 107. Fixed plate; 108. Sliding frame; 109. End seat; 2. Driving assembly; 201. Hydraulic push rod; 202. Sealing plate; 203. Sliding wheel; 204. Feed pipe; 205. Drain pipe; 3. Filter assembly; 301. Filter press frame; 302. Elastic filter cloth; 303. Middle plate; 304. Middle through pipe; 305. Flow pipe; 306. Docking hole; 307. Connecting ear; 308. Airway; 309. One-way valve; 310. Snap-in groove; 311. Matching plate; 312. Positioning hole; 4, auxiliary components; 401, electric control slide; 402, slide rail; 403, top seat; 404, air pump; 405, splicing seat; 406, through hole; 407, air supply hole; 408, moving tube; 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, reset spring; 421, follower rod; 422, pressure plate; 423, arc block; 424, extrusion block; 425, long rod; 426, cross hole; 427, groove; 428, square plate; 429, compression spring. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] Embodiment 1 like Figure 1 - Fig.12 As shown, the filter press device after potassium fluoride concentration includes a support component 1, a driving component 2 is provided on one side of the support component 1, and a plurality of filter components 3 are evenly arranged inside the support component 1. The driving component 2 works above the support component 1 and performs filter pressing on the filter components 3. At the same time, the concentrated potassium fluoride solution passes through the filter components 3 to form a filter cake and a filtrate. Two auxiliary components 4 are symmetrically provided above the support component 1. After the filter pressing is completed, the auxiliary components 4 work and discharge the materials to each filter component 3 separately.

[0028] The support assembly 1 includes two mounting frames 101, which are stationary. A fixing plate 107 is provided on the top of each mounting frame 101. The fixing plate 107 mainly serves as a fixing connection. Two end seats 109 are symmetrically provided on the front and rear sides of the fixing plate 107. Two sliding frames 108 are symmetrically provided between the two end seats 109 and on the front and rear sides of the mounting frame 101. The sliding frames 108 are used to slide the filter assembly 3.

[0029] Two rotating rods 103 are symmetrically rotatably connected to both sides of the mounting frame 101 through bearings, and the outer surfaces of the rotating rods 103 are rotatably connected to the unloading plates 104. The outer surfaces of the two rotating rods 103 are movably hinged with unloading push rods 105. The unloading push rods 105 start and drive the two rotating rods 103 to rotate, and the rotating rods 103 rotate and drive the unloading plates 104 to rotate. The unloading plates 104 rotate and realize the unloading and recovery of the filter cake above. One side of the two sliding frames 108 is symmetrically provided with multiple reinforcing feet 106, and the reinforcing feet 106 and the bottom of the mounting frame 101 are provided with buffer pads. The setting of the buffer pads improves the buffering and supporting effect of the reinforcing feet 106 and the mounting frame 101. A controller 102 is provided on one side of the end seat 109, and the controller 102 electrically controls each electrical component.

[0030] The driving component 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 filter press frame 301. The hydraulic push rod 201 starts and drives the sealing plate 202 to move. The sealing plate 202 realizes compaction and sealing of the filter assembly 3 at the end. Sliding wheels 203 are symmetrically provided on both sides of the sealing plate 202. The bottom of the moving wheel 203 is slidably connected to the top of the sliding frame 108, and the sliding wheel 203 slides above the sliding frame 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, and a plurality of drainage pipes 205 are evenly provided on one side of the fixed plate 107. The concentrated potassium fluoride solution enters into the interior of the plurality of filter components 3 along the feed pipe 204, and the filtrate after the filtration is discharged and recovered along the plurality of drainage pipes 205, thereby realizing a cyclic filtration process.

[0031] The filter assembly 3 includes a filter press frame 301, which is mainly used for filtering the concentrated potassium fluoride solution. An intermediate plate 303 is provided at the center of the filter press frame 301. Two elastic filter cloths 302 are symmetrically provided inside the filter press frame 301. The elastic filter cloths 302 are located on both sides of the intermediate plate 303. The concentrated potassium fluoride solution is filtered by multiple elastic filter cloths 302 to form a required filter cake between adjacent filter press frames 301. The filtrate formed after filtering passes through the elastic filter cloths 302 to reach the intermediate plate 303 and is recycled. The central axis of the elastic filter cloth 302 and the intermediate plate 303 is A central through pipe 304 is provided, and the output end of the feed pipe 204 is connected to the central through pipe 304. The concentrated potassium fluoride solution introduced into the feed pipe 204 flows backward in sequence through multiple central through pipes 304. Multiple flow pipes 305 are evenly provided inside the filter press frame 301. The output ends of multiple drainage pipes 205 are connected to the flow pipe 305. One side of the flow pipe 305 is connected to the inside of the filter press frame 301 through a docking hole 306. The filtrate filtered by the elastic filter cloth 302 enters the inside of the flow pipe 305 along the docking hole 306, and is finally discharged and recovered along multiple drainage pipes 205.

[0032] Two connecting ears 307 are symmetrically arranged on both sides of the filter press frame 301. The bottom of the connecting ears 307 is provided with a snap-in groove 310. The inside of the snap-in groove 310 is snap-fitted with the top of the sliding frame 108. The sliding stability of the filter press frame 301 between the sliding frames 108 is improved by means of the cooperation between the snap-in groove 310 and the sliding frame 108. An air duct 308 is arranged inside the connecting ear 307. A matching plate 311 is arranged inside the air duct 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 recover the clean gas introduced, thereby improving the subsequent elastic filter cloth 3 02's clean gas cleaning effect, 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, the output end of the air duct 308 is located between the two elastic filter cloths 302, and a one-way valve 309 is provided at the end of the air duct 308. The ventilation direction of the one-way valve 309 is along the matching plate 311 to the inside of the filter press frame 301. The one-way valve 309 is used to limit the flow direction inside the air duct 308, and the clean gas inside the air duct 308 enters the inside of the filter press frame 301 and performs wind cleaning on the elastic filter cloths 302 on both sides, while the filtrate in the filtration process cannot enter the inside of the air duct 308.

[0033] The auxiliary component 4 includes an electrically controlled slide 401, which is internally slidably connected to a slide rail 402. Both sides of the slide rail 402 are fixedly connected to the side walls of the end seat 109. The controller 102 controls the start of the electrically controlled slide 401 and can realize the sliding of the electrically controlled slide 401 on the outer surface of the slide rail 402, thereby improving the cleaning effect of the material discharge of the filter press frame 301.

[0034] A top seat 403 is provided on the top of the electric control slide 401, and a through hole 406 is opened on the top of the top seat 403. A movable tube 408 is sealed and slidably connected inside the through hole 406. The movable tube 408 can continuously move up and down inside the through hole 406, thereby not only realizing the adjustment of the amount of clean gas passing into the movable tube 408, but also realizing the elastic vibration clearing of the elastic filter cloth 302 inside the filter press frame 301 through the connecting ear 307.

[0035] An air pump 404 is provided on one side of the top seat 403, and a plurality of splicing seats 405 are evenly provided on the bottom of the air pump 404. The bottom of the splicing seat 405 is fixedly connected to the top of the electric control slide seat 401. The setting of the splicing seat 405 improves the fixed support effect of the air pump 404. An air supply hole 407 is connected to one side of the through hole 406. The output end of the air pump 404 is connected to the air supply hole 407. The air pump 404 is started and the output end continuously introduces clean gas into the air supply hole 407. The clean gas continuously reaches the inside of the through hole 406 along the air supply hole 407. The side wall of the moving tube 408 matches the output end of the air supply hole 407. When the moving tube 408 moves upward for a longer distance, the blocking area of ​​the moving tube 408 to the air supply hole 407 is reduced, the amount of clean gas entering the through hole 406 from the air supply hole 407 increases, and the amount of clean gas entering the moving tube 408 from the corresponding through hole 406 increases.

[0036] 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. The pressure sensors 411 are used to detect the pressure value on the top of the movable seat 409. Two electric control push rods 410 are symmetrically provided on the top of the top seat 403. 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 is extended, 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 movable tube 408 to move upward along the through hole 406. Two inner grooves 412 are symmetrically provided on the top of the movable seat 409. The interior of the inner grooves 412 is rotatably connected with a clamping plate 413 through a torsion spring. The clamping plate 413 can be unidirectionally elastically rotated inside the inner grooves 412. The interiors of the two clamping plates 413 match the side walls of the connecting ears 307. The connecting ears 307 are clamped and fixed with the help of the cooperation of the two clamping plates 413, and then the filter press frame 301 is driven to move through the connecting ears 307 to carry out material unloading and cleaning.

[0037] A vertical hole 414 is provided inside the movable seat 409, and the inner cavity of the movable tube 408 is sealed and connected to the bottom of the vertical hole 414. The vertical hole 414 corresponds to the airway 308, and the clean gas inside the movable tube 408 can flow upward along the vertical hole 414. The clean gas continues to flow upward and reaches the inside of the airway 308, and the clean gas inside the airway 308 continuously moves to the inside of the filter press frame 301 and realizes reverse wind cleaning of the elastic filter cloth 302 on both sides, thereby improving the wind-powered clearing and material feeding effect of the elastic filter cloth 302. The vertical hole 414 is sealed and slidably connected with a filter plate 415, and the inside of the filter plate 415 is evenly provided with a plurality of The filter holes 416 are provided to filter and clean the clean gas with the help of the filter holes 416 inside the filter plate 415, and the subsequent wind cleaning effect on the elastic filter cloth 302 is correspondingly improved. The positioning holes 312 and the filter holes 416 are staggered. Therefore, when the filter plate 415 drives the filter holes 416 to move upward, the positioning holes 312 and the filter holes 416 are staggered with each other and hinder the circulation of the clean gas, thereby reducing the amount of clean gas inside the vertical hole 414 entering the air duct 308, thereby realizing the pulse wind cleaning of the elastic filter cloth 302 inside the filter press frame 301 by the gas inside the air duct 308, and ensuring the unblockability of the elastic filter cloth 302.

[0038] Side grooves 417 are symmetrically provided 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, the filter plate 415 is synchronously driven to move up and down. A return spring 420 is provided on 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 setting of the return spring 420 improves the elastic return effect of the side plate 419. Two elastic plates 418 are symmetrically provided at the bottom of the filter plate 415. The elastic plates The bottom of 418 is fixedly connected to the inner wall of the vertical hole 414. The setting of the elastic plate 418 ensures that the clean gas inside the vertical hole 414 is continuously discharged upward along the filter hole 416 inside the filter plate 415 to avoid arbitrary circulation and waste of the clean gas. A follower rod 421 is provided at the bottom of the side plate 419, and a pressure plate 422 is provided at the bottom of the follower rod 421. An arc block 423 is provided at the bottom of the pressure plate 422. When the side plate 419 moves up and down, the pressure plate 422 is driven to move up and down by the follower rod 421, and the pressure plate 422 simultaneously drives the arc block 423 to move up and down.

[0039] 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, the position of the transverse hole 426 matches the side groove 417, the interior of the transverse hole 426 is sealed and slidably connected with a long rod 425, and a plurality of extrusion blocks 424 are evenly arranged on the top of the long rod 425. The long rod 425 moves laterally inside the transverse hole 426 and drives the plurality of extrusion blocks 424 to move, and the plurality of extrusion blocks 424 are continuously extruded with the arc block 423 and drive the arc block 423 to move up and down, and the diameters of the plurality of extrusion blocks 424 are all different. This arrangement further improves the unevenness of the distance that the extrusion block 424 drives the arc block 423 to move up and down, and the long rod Square plates 428 are symmetrically provided on both sides of 425, and two grooves 427 are symmetrically provided on the side wall of the movable seat 409. The square plates 428 match the grooves 427. The square plates 428 move and drive the long rod 425 to move. The side walls of the grooves 427 are provided with compression springs 429. The other end of the compression spring 429 is fixedly connected to the side walls of the square plates 428. The compression springs 429 are located on the outer surface of the long rod 425. The setting of the compression springs 429 further improves the elastic reset effect of the square plates 428. At the same time, the end of the square plates 428 matches the side walls of the connecting ears 307. The square plates 428 can be squeezed and contacted with the side walls of the connecting ears 307 and drive the long rod 425 to move laterally inside the cross-hole 426.

[0040] When the concentrated potassium fluoride solution is actually filtered and discharged, a large amount of filter cake is adhered to the side wall of the elastic filter cloth 302. If part of the filter cake cannot be separated from the elastic filter cloth 302 by the weight of the filter cake itself, it will not only reduce the recovery of the filter cake, but also affect the subsequent filter pressing of the potassium fluoride solution. At the same time, when the filter cake on the side wall of the elastic filter cloth 302 is discharged, if different amounts of filter cake are adhered to different positions of the elastic filter cloth 302, different amounts of wind cleaning are required for it, but the prior art lacks the control of the amount of cleaning gas. of the adjustment function, and thus cannot achieve complete and thorough cleaning; and if the amount of filter cake adhesion on the side wall of the elastic filter cloth 302 is too large, the filter cake on the side wall of the elastic filter cloth 302 cannot be cleaned evenly and thoroughly by only relying on the stable circulation of clean gas, and the filtering quality of the elastic filter cloth 302 is reduced; and when the filter plate 415 above the electric control slide seat 401 is used for a long time to filter the clean gas, the inside of the filter plate 415 is prone to be blocked by some dust and impurities, which will reduce the subsequent clean gas quality and ultimately affect the wind-powered clearing and blocking effect of the elastic filter cloth 302.

[0041] In actual use, first, the controller 102 controls the hydraulic push rod 201 to start and drive the sealing plate 202 to move toward the end close to the feed pipe 204. When the sealing plate 202 is squeezed with the filter press frame 301 at the end, it drives multiple filter press frames 301 to squeeze each other and contact with the fixed plate 107. Multiple central tubes 304 and flow tubes 305 are interconnected. Then, the concentrated potassium fluoride solution is passed into the central tube 304 along the feed pipe 204. The solid raw materials in the potassium fluoride solution are continuously squeezed on the side walls of the elastic filter cloth 302 between the connected filter press frames 301 to form a filter cake, while the liquid raw materials in the potassium fluoride solution are continuously entered into the drain pipe 205 along the docking hole 306 to form a filtrate, and finally discharged along the drain pipe 205 for recovery.

[0042] When the concentrated potassium fluoride solution is filtered, the controller 102 controls the hydraulic push rod 201 to move in the opposite direction and drives the sealing plate 202 to reach the maximum distance away from the end of the feed pipe 204. At the same time, the electric control slide 401 starts and continuously moves along the slide rail 402 to the bottom of the filter press frame 301. When the clamping plate 413 moves to the side of the connecting ear 307, the thrust applied to the side wall of the clamping plate 413 by the connecting ear 307 makes the clamping plate 413 hingedly rotate inside the inner groove 412 and pass 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 duct 308, and the filter plate 415 corresponds to the matching plate 311.

[0043] 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 tube 408 to move upward to the initial position. The movable tube 408 no longer completely blocks the air supply hole 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 press frame 301 to move upward, and the snap-in groove 310 disengages from the top of the sliding frame 108. The pressure sensor 411 detects the pressure value.

[0044] At the same time, the controller 102 controls the air pump 404 to start and pass clean gas into the air supply hole 407. The clean gas enters the through hole 406 along the air supply hole 407, and continues upward along the through hole 406 to reach the inside of the movable tube 408. The clean gas inside the movable tube 408 enters the air duct 308 along the vertical hole 414, and the clean gas is fully filtered and cleaned when passing through the filter hole 416 inside the filter plate 415 and the positioning hole 312 inside the matching plate 311. After that, the clean gas enters the inside of the filter press frame 301 along the air duct 308, and is discharged to both sides along the inside of the filter press frame 301, thereby realizing reverse wind cleaning of the elastic filter cloth 302, with higher cleaning efficiency and better clearing and feeding effect.

[0045] Afterwards, the controller 102 controls the electric-controlled slide 401 to move in the opposite direction, and the electric-controlled slide 401 drives the upper movable seat 409 to move in the opposite direction. The movable seat 409 drives multiple filter press frames 301 in turn through the clamping plate 413 to move away from the end of the feed pipe 204. The adjacent filter press frames 301 are separated, and the filter cake between the two filter press frames 301 falls downward under the action of its own weight to the top of the discharge plate 104 for recovery, thereby realizing the recovery and processing of the filter cake.

[0046] When the pressure values ​​detected by the pressure sensor 411 are all equal to and greater than the preset pressure value, it means that filter cakes are still adhered to the two sides of the elastic filter cloth 302 at this time. However, as the clean gas cleans the filter cakes adhered to the side walls of the elastic filter cloth 302 by wind force, the pressure value detected by the pressure sensor 411 decreases continuously, and the controller 102 controls the output end of the electric control push rod 410 to extend a smaller distance, and the electric control push rod 410 drives the movable seat 409 to move downward continuously, and the movable seat 409 drives the movable tube 408 to move downward continuously, and the blocking area of ​​the air supply hole 407 by the movable tube 408 increases, and the amount of clean gas inside the air supply hole 407 entering the through hole 406 is reduced, and the amount of clean gas entering the filter press frame 301 along the through hole 406, the movable tube 408, the vertical hole 414 and the airway 308 is reduced, thereby ensuring the adjustable and controllable wind force clearing of the elastic filter cloth 302, and further ensuring the filter pressing effect of the elastic filter cloth 302 on the subsequently concentrated potassium fluoride solution.

[0047] When the pressure values ​​detected by the multiple pressure sensors 411 are not equal, it means that the filter cakes on the side wall of the elastic filter cloth 302 are unevenly distributed. Then, 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 increases to extend, and the electric control push rod 410 drives the movable seat 409 to move upward, and the movable seat 409 drives the connecting ear 307 on the side of the filter press frame 301 to move upward, and the movable seat 409 drives the movable tube 408 to move upward inside the through hole 406, and the blocking area of ​​the air supply hole 407 by the movable tube 408 is reduced, so that the amount of clean gas inside the air supply hole 407 entering the filter press frame 301 upward increases, and the controller 102 controls the pressure sensor 411 to move upward. When the pressure value detected by the sensor 411 decreases, the output end of the electric control push rod 410 on one side is shortened, and the electric control push rod 410 drives the movable seat 409 to move downward, and the movable seat 409 drives the connecting ear 307 on this side of the filter press frame 301 to move downward, and the movable seat 409 drives the movable tube 408 to move downward along the through hole 406, and 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, and the air duct 308 is reduced, then the filter press frame 301 is unevenly tilted and shaken between the two sliding frames 108, and cooperates with the uneven clean gas flow inside the filter press frame 301, which correspondingly improves the efficient cleaning effect of the filter cake adhered to the side wall of the elastic filter cloth 302.

[0048] When the movable seat 409 above the electric control slide 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 preset pressure value, it means that some filter cakes still remain on the side wall of the elastic filter cloth 302, and the stable clean gas introduced into the air duct 308 cannot thoroughly and effectively clean the filter cakes 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, and the electric control push rod 410 drives the movable seat 409 on the top to move upward to the maximum distance, and the movable seat 409 drives the connecting ear 307 and the internal filter press frame 301 to move upward to the maximum distance, and the movable seat 409 drives the movable tube 408 to move upward to the maximum distance, and the blockage area of ​​the air supply hole 407 by the movable tube 408 reaches the minimum value.

[0049] After the air pump 404 is started, the amount of clean gas in the air supply hole 407 entering the filter press frame 301 along the through hole 406, the movable pipe 408, and the air duct 308 reaches the maximum value, thereby improving the thorough and effective wind 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 is squeezed and contacted with the side wall of the other connecting ear 307. The square plate 428 squeezes the compression spring 429 and drives the long rod 425 to move along the cross hole 426. The long rod 425 drives multiple squeezing blocks 424 to move synchronously. When the squeezing block 424 moves with the long rod 425, it continuously squeezes and contacts the arc block 423. When the arc block 423 is pushed by the squeezing block 424, it drives the pressing plate 422 to move upward along the side groove 417. The pressing plate 422 drives the side plate 419 to squeeze the reset spring 420 and move upward through the follower rod 421.

[0050] The side plate 419 drives the filter plate 415 to move upward, and the upper part of the filter plate 415 continues to move upward along the vertical hole 414 into the air passage 308, so that the distance between the filter plate 415 and the matching plate 311 is continuously reduced, and in combination with the staggered distribution of the positioning hole 312 and the filter hole 416, the amount of clean gas in the vertical hole 414 entering the air passage 308 along the filter hole 416 and the positioning hole 312 is continuously reduced, and the clean gas in the air passage 308 enters the gas inside the filter press frame 301 along the one-way valve 309. The amount of clean gas in the vertical hole 414 entering the air passage 308 along the filter hole 416 and the positioning hole 312 increases, and the amount of gas in the air passage 308 entering the filter press frame 301 along the one-way valve 309 increases.

[0051] Therefore, under the continuous squeezing and contacting action of multiple squeezing blocks 424 with unequal diameters and the arc block 423, the distance between the filter plate 415 and the matching plate 311 is constantly changing, and the amount of clean gas inside the vertical hole 414 entering the filter press frame 301 along the air duct 308 is constantly changing, thereby realizing pulse wind cleaning of the elastic filter cloth 302, effectively improving the cleaning and dredging effect of the filter cake adhered to the side wall of the elastic filter cloth 302, and having stronger permeability and higher controllability.

[0052] And when the filter plate 415 continuously moves back and forth inside the vertical hole 414 and the air duct 308, the filter plate 415 and the continuously stretched elastic plate 418 elastically deform, so that the clean gas inside the vertical hole 414 can still stably enter the air duct 308, and the filter plate 415 continuously squeezes and collides with the matching plate 311, and the matching plate 311 transmits the collision to the connecting ear 307 end, and the connecting ear 307 transmits the collision to the filter press frame 301 end, thereby realizing continuous vibration cleaning of the filter press frame 301, and cooperating with the reciprocating circulation of the clean gas inside the filter press frame 301, further improving the cleaning effect of the filter cake adhered to the side wall of the elastic filter cloth 302, and at the same time, the clean gas can continuously circulate inside the circulation pipe 305 along the docking hole 306, and circulate through the middle pipe 304, thereby improving the complete and thorough cleaning of the internal structure of the filter press frame 301.

[0053] After completing the vibration cleaning of the filter press frame 301, the pressure values ​​detected by the multiple pressure sensors 411 are all reduced to the preset values. At this time, the controller 102 controls the output end of the electric control push rod 410 to reach the minimum value, and the electric control push rod 410 drives the movable seat 409 to move downward to the minimum value, and the movable seat 409 drives the upper connecting ear 307 to move downward to the minimum value. The engaging groove 310 at the bottom of the connecting ear 307 is engaged with the sliding frame 108, and then the controller 102 controls the electric control slide seat 401 to move in the opposite direction and unload the subsequent filter press frame 301.

[0054] When the electric push rod 410 drives the movable seat 409 to move to the side wall of the subsequent filter press frame 301 close to the side of the feed pipe 204, the controller 102 controls the electric push rod 410 to start and the output end to extend to the maximum value, the electric push rod 410 drives the movable seat 409 to move upward to the maximum distance, the movable seat 409 drives the movable tube 408 to move upward along the through hole 406 to the maximum distance, the air pump 404 starts and introduces clean gas into the air supply hole 407, the clean gas continuously enters the filter press frame 301 along the through hole 406, the movable tube 408, the vertical hole 414 and the air duct 308, and the gas volume reaches the maximum value, and the other side of the movable seat 409 The square plate 428 is squeezed and contacted with the subsequent side walls of the connecting ear 307, and the square plate 428 drives multiple squeezing blocks 424 to move inside the cross hole 426 through the long rod 425. The squeezing blocks 424 are continuously squeezed and pushed by the arc block 423. The arc block 423 drives the side plate 419 to move up and down inside the side groove 417 through the pressure plate 422 and the follower rod 421. The side plate 419 drives the filter plate 415 to move up and down inside the side groove 417. The filter plate 415 drives multiple filter holes 416 to move up and down synchronously and vibrate and clean the dust and impurities blocked inside, thereby further improving the clearing effect of the filter hole 416, with stronger dredging and better cleaning performance.

[0055] After the filter holes 416 inside the filter plate 415 are cleared, the controller 102 controls the electric control push rod 410 to shorten to the minimum value, and the electric control push rod 410 drives the movable seat 409 to move downward to the minimum value, and moves and vibrates the subsequent filter press frame 301 according to the above process to clear the blockage, thereby improving the unloading effect of the filter cakes adhered to the side walls of multiple filter press frames 301. After the unloading of multiple filter press frames 301 is completed, the unloading push rod 105 is started and drives the rotating rods 103 on both sides to rotate in the opposite direction. The rotating rods 103 drive the unloading plate 104 to rotate and open each other, and the filter cake above the unloading plate 104 falls downward and is recovered. After the above process is completed, the above process is repeated continuously and the subsequent concentrated potassium fluoride solution is filtered and recovered.

[0056] The filter press device for concentrated potassium fluoride has high filter press efficiency and good filter press effect, meets the demand for efficient filter press of concentrated potassium fluoride solution, is simple to operate, safe and stable, and has high control efficiency and high control accuracy, ensuring the large-scale filter press demand of potassium fluoride; at the same time, after the filter press is completed, the amount of gas entering the air duct 308 through the vertical hole 414 is adjusted according to the amount of filter cake adhered to the side wall of the elastic filter cloth 302, effectively improving the adaptive wind clearing effect of the elastic filter cloth 302 inside the filter press frame 301, with stronger dredging and higher control accuracy; and when the filter press frame 301 moves in the reverse direction to the end, since the vertical hole 414 and the air duct 308 are facing each other, the square plate 428 and the connecting ear 307 squeeze and collide with each other and drive part of the filter plate 415 It enters the air passage 308 along the vertical hole 414 and moves up and down, thereby adjusting the distance between the filter plate 415 and the matching plate 311, correspondingly realizing the pulse flow of the clean gas inside the vertical hole 414 into the filter press frame 301 along the air passage 308, and cooperating with the vibration of the filter press frame 301 itself to improve the separation effect of the filter cake with a large adhesion to the side wall of the elastic filter cloth 302; and when the clearing is completed, the square plate 428 squeezes and collides with the other connecting ear 307, so that the filter plate 415 vibrates up and down inside the vertical hole 414, and cooperates with the flow of clean gas inside the vertical hole 414, so as to efficiently realize the clearing effect of the multiple filter holes 416 inside the filter plate 415, and ensure the subsequent dredging and cleaning effect of the elastic filter cloth 302 inside the filter press frame 301.

[0057] Embodiment 2

[0058] The application of the filter press device after the potassium fluoride is concentrated in the potassium fluoride production process comprises the following steps: S1. The 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.

[0059] 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 is reduced, and 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 duct 308 increases. The wind force applied by the clean gas inside the filter press frame 301 on the elastic filter cloths 302 on both sides increases.

[0060] S3. When the filter press frame 301 moves in the opposite 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, and the side plate 419 drives the filter plate 415 to move up and down inside the vertical hole 414 and the air duct 308. The amount of clean gas inside the vertical hole 414 entering the filter press frame 301 along the air duct 308 keeps changing, 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.

[0061] S4. After the elastic filter cloth 302 inside the filter press frame 301 is cleared, the electrically controlled slide seat 401 drives the movable seat 409 to move in the opposite direction to the end of the subsequent filter press frame 301, and the movable seat 409 moves upward to the maximum distance. The side plate 419 drives the filter plate 415 to vibrate up and down inside the vertical hole 414 and cooperates with the clean gas flowing inside the vertical hole 414 to clear itself.

[0062] By further limiting the filter pressing method, the filter pressing efficiency is improved, the filter pressing quality is guaranteed, and at the same time, the clearing effect on the side wall of the elastic filter cloth 302 is improved.

[0063] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0064] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that 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 slide seat (401), a top seat (403) is provided on the top of the electrically controlled slide 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).

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 middle plate (303) is provided at the center of the filter press frame (301), the elastic filter cloth (302) is located on both sides of the middle plate (303), 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 flow 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 liquid discharge pipes (205) are connected to the flow pipe (305), and one side of the flow 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: 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); the output end of the air duct (308) is located between the two elastic filter cloths (302); a one-way valve (309) is provided at the end of the air duct (308); the ventilation direction of the one-way valve (309) is from the matching plate (311) to the inside of the filter press frame (301); a clamping groove (310) is provided at the bottom of each connecting ear (307); the inside of each clamping groove (310) is clamped with the top of the sliding frame (108); a plurality of positioning holes (312) are evenly provided inside the matching plate (311); 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: Two electrically controlled push rods (410) are symmetrically arranged on the top of the top seat (403), the top output end of the electrically controlled push rod (410) is hinged to the bottom of the movable seat (409), 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), and two inner grooves (412) are symmetrically arranged on the top of the movable seat (409), the interior of the inner grooves (412) are rotatably connected to the clamping plates (413) through torsion springs, and the interiors of the two clamping plates (413) match the side walls of the connecting ears (307).

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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