A filter press device for rare earth dehydration and a method thereof

Abstract

The application discloses a kind of filter pressing devices and methods for rare earth dehydration, belong to rare earth filter pressing technical field, including support frame, installation frame, filter pressing mechanism and alternate filter mechanism;Filter pressing mechanism includes filter pressing plate, filter pressing frame, hydraulic module, asymmetric diaphragm structure and fixed end plate, asymmetric diaphragm structure for secondary extrusion to filter cake is installed on filter pressing plate;Plate-frame moving support mechanism is installed on installation frame;Fixedly installed on installation frame there is conveying pipeline for conveying slurry into filter pressing frame;Alternate filter mechanism includes elastic guide structure, moving support structure, filter screen replacement structure, movable drive structure, alternate circulating filter screen and scraping structure;Movable drive structure is used to drive filter screen replacement structure;The rear side of support frame is installed with filter screen cleaning mechanism for cleaning alternate circulating filter screen.By the above manner, it is possible to carry out filter pressing and filter screen cleaning simultaneously, effectively improve efficiency, and avoid contact between filter cake and cleaning liquid.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of rare earth filter pressing, in particular to a filter pressing device for rare earth dehydration and a method thereof. BACKGROUND

[0002] The extraction and processing of rare earths usually involves steps such as leaching, precipitation, washing, etc., which will produce a large amount of rare earth-containing solid slurry, slurry; in order to facilitate subsequent purification and burning processes, the solid and liquid in the slurry need to be separated, and the filter cake after filter pressing needs to be cleaned to reduce impurity residues.

[0003] For example, the Chinese patent with publication number CN112121482B discloses a suspension beam filter press, which separates the filter plate unit after filter pressing, drives the filter cloth to move synchronously by the filter cloth driving mechanism, moves the filter cloth to the guide roller position, facilitates the removal of filter cake, and cleans the filter cloth by the filter cloth cleaning mechanism at the bottom.

[0004] However, in the filter pressing process including filter pressing, discharging, cleaning, etc., the filter pressing, discharging, cleaning, etc. all need to consume a lot of time;

[0005] The hydraulic filter press shown in the prior art cleans the filter cloth at the same time as discharging the filter cake; in this process, the liquid for cleaning the filter cloth is easy to fall with the filter cake, which makes the filter cake after filter pressing contact with water again, which is not conducive to maintaining the moisture content of the filter cake; especially when dealing with rare earths, the moisture content of the rare earth filter cake is usually required to be below 10%; if the filter cloth is cleaned after the filter cake is discharged, the filter cloth needs to be moved again, which goes against the original intention of improving the overall efficiency by synchronizing discharging and cleaning.

[0006] At the same time, the filter press drives the filter cloth to move by rotating the shaft driven by the motor, then rotating the filter cloth driving shaft by a plurality of movable and perpendicular bevel gears, and moving the filter cloth by the filter cloth driving shaft; the filter press usually has a plurality of filter plates, and the driving structure needs a long driving shaft and a plurality of perpendicular bevel gears, so that the driving shaft needs to bear a large torque, thereby reducing the overall service life.

[0007] Therefore, the present application provides a filter pressing device for rare earth dehydration and a method thereof to solve the above problems. SUMMARY

[0008] In view of the above shortcomings of the prior art, the present application provides a filter pressing device for rare earth dehydration and a method thereof.

[0009] To achieve the above purpose, the present application is realized by the following technical solutions:

[0010] A kind of rare earth dehydration filter press device and method thereof, including support frame, installation frame and filter press mechanism, further including alternating filter mechanism;

[0011] The filter press mechanism includes filter plate, filter frame, hydraulic module, asymmetric diaphragm structure and fixed end plate, a plurality of filter plates and filter frames are alternately arranged between the hydraulic module and the fixed end plate, the asymmetric diaphragm structure for secondary extrusion of filter cake is installed on the filter plate;Hydraulic module is installed on support frame, fixed end plate is fixedly installed on support frame;

[0012] The installation frame is provided with a plate-frame moving support mechanism;The installation frame is fixedly provided with a conveying pipeline for conveying slurry into the filter frame;

[0013] The alternating filter mechanism includes elastic guide structure, moving support structure, filter screen replacement structure, movable drive structure, alternating circulating filter screen and scraping structure, the elastic guide structure is installed on one side of the filter plate, the filter screen replacement structure is installed on the other side of the filter plate, and the moving support structure is installed on the installation frame;The movable drive structure for driving the filter screen replacement structure is installed on the installation frame;The alternating circulating filter screen is sleeved outside the elastic guide structure and the filter screen replacement structure;The scraping structure is symmetrically fixed on the filter screen replacement structure;

[0014] The rear side of the support frame is provided with a filter screen cleaning mechanism for cleaning the alternating circulating filter screen.

[0015] Further, the plate-frame moving support mechanism includes opening and closing drive structure and plate-frame support structure, the plate-frame support structure for supporting the filter plate and the filter frame is installed on the installation frame, and the opening and closing drive structure for moving the filter plate and the filter frame is installed on the installation frame.

[0016] Further, the asymmetric diaphragm structure includes hydraulic diaphragm, the diaphragm installation cavity is formed in the middle of the filter plate, two hydraulic diaphragms are fixedly installed in the diaphragm installation cavity, and the two hydraulic diaphragms are asymmetrically arranged in the diaphragm installation cavity;The hydraulic diaphragm is communicated with the external hydraulic pump through the hose;One side of the hydraulic diaphragm is located in the diaphragm installation cavity when it is contracted and expanded;The other side of the hydraulic diaphragm is located in the same horizontal plane as one side of the filter plate when it is contracted, and is located in the adjacent filter frame when it is expanded.

[0017] Further, the elastic guide structure includes mounting bracket one, guide rod, spring one and guide roller, the guide rods are fixedly installed on the mounting bracket one at equal intervals, the spring one is sleeved outside the guide rod, the guide rod is limitingly and slidingly connected with one side of the filter plate, one end of the spring one is fixedly connected with the mounting bracket one, and the other end of the spring one is fixedly connected with the filter plate;The guide roller is rotatably installed on the mounting bracket one.

[0018] Further, the filter screen replacement structure comprises a mounting frame three, a driving roller and a belt pulley one, the mounting frame three is fixedly installed on the other side of the filter plate, the driving roller is rotatably installed on the mounting frame three, and the belt pulley one is rotatably installed on the mounting frame three; the driving roller is fixedly connected with the belt pulley one; and the mounting frame three is connected with the moving support structure.

[0019] Further, the movable driving structure comprises a moving linear module two, a horizontal linear module, a moving plate, an elastic moving module and a belt pulley two, the moving linear module two is fixedly installed on the mounting frame, the moving end of the moving linear module two is fixedly installed with the horizontal linear module, and the moving end of the horizontal linear module is fixedly installed with the moving plate; two belt pulleys two are rotatably installed on the moving plate; the elastic moving module is installed on the moving plate, the moving end of the elastic moving module is installed with the belt pulley three; the moving plate is fixedly installed with a driving motor for driving one of the belt pulleys two to rotate, and the belt pulley three and the two belt pulleys two are driven through transmission belts.

[0020] Further, the elastic moving module comprises a moving guide rail, an air cylinder, a sliding block, a spring two, a sliding plate and an extension rod, the moving guide rail is fixedly installed on the moving plate, the air cylinder is fixedly installed on the moving plate, and the sliding block and the sliding plate are limitingly slid on the moving guide rail; one end of the extension rod is fixedly connected with the sliding block, and the other end of the extension rod is fixedly connected with the sliding plate; the spring two is sleeved outside the extension rod, one end of the spring two is limitingly and slidably connected with the sliding block, and the other end of the spring two is fixedly connected with the sliding plate; and the output end of the air cylinder is fixedly connected with the sliding block.

[0021] Further, the filter screen replacement structure comprises a mounting frame three, a driving roller and a belt pulley one, the mounting frame three is fixedly installed on the other side of the filter plate, the driving roller is rotatably installed on the mounting frame three, and the belt pulley one is rotatably installed on the mounting frame three; the driving roller is fixedly connected with the belt pulley one; and the mounting frame three is connected with the moving support structure.

[0022] Further, the filter screen replacement structure comprises a mounting frame three, a driving roller and a belt pulley one, the mounting frame three is fixedly installed on the other side of the filter plate, the driving roller is rotatably installed on the mounting frame three, and the belt pulley one is rotatably installed on the mounting frame three; the driving roller is fixedly connected with the belt pulley one; and the mounting frame three is connected with the moving support structure.

[0023] In order to better achieve the purpose of the application, the application also provides a rare earth filter pressing method, which comprises the following steps:

[0024] Step one: the opening and closing driving structure drives the filter plate and filter frame to move through the plate and frame support structure, so that the filter plate and filter frame are tightly attached, and then a plurality of filter plates and filter frames are tightly pressed through the cooperation of the hydraulic module and the fixed end plate; the slurry is transported into the filter frame through the external conveying pipeline, and the slurry is filtered through the alternating circulation filter screen between the filter plate and the filter frame;

[0025] Step two: after the filter cake is initially formed, the asymmetric diaphragm structure is started to further extrude the filter cake; after extrusion, the hydraulic module is reset, and the opening and closing driving structure drives the filter plate and filter frame to move one by one through the plate and frame support structure;

[0026] Step three: the movable driving structure drives the alternating circulation filter screen to move through the filter screen replacement structure until the alternating circulation filter screen at the filter screen replacement structure is replaced between the filter plate and the filter frame; the filter cake adhered to the alternating circulation filter screen falls off when it moves to the elastic guide structure and the scraping structure; at this time, the alternating circulation filter screen between the filter plate and the filter frame is not in contact with the slurry;

[0027] Step four: repeat step one; in this process, the filter screen replacement structure is cleaned by the filter screen cleaning mechanism.

[0028] Compared with the prior art, the present application has the following advantages: 1. The slurry is transported into the filter frame through the external conveying pipeline, and the slurry is filtered through the alternating circulation filter screen between the filter plate and the filter frame; after the filter cake is initially formed, the asymmetric diaphragm structure is started to further extrude the filter cake, thereby further reducing the moisture content of the filter cake; the asymmetric diaphragm structure is asymmetrically arranged, so that the filter cake is pushed between the filter frame and the filter plate to avoid adhesion of the filter cake to the filter frame; after extrusion, the hydraulic module is reset, and the opening and closing driving structure drives the plate and frame support structure to move, and part of the filter cake falls off; the alternating circulation filter screen is moved through the filter screen replacement structure until the alternating circulation filter screen at the filter screen replacement structure is replaced between the filter plate and the filter frame; in this process, the filter cake adhered to the alternating circulation filter screen falls off when it moves to the elastic guide structure and the scraping structure; at this time, the alternating circulation filter screen between the filter plate and the filter frame is not in contact with the slurry; thereby completing the rapid replacement of the filter screen;

[0029] 2. Through the arrangement of the alternating circulation filter screen, the filter screen replacement structure, the elastic guide structure and the movable driving structure, the originally sequential processes of filter pressing, cake unloading and alternating circulation filter screen cleaning are modified to simultaneously perform filter pressing and alternating circulation filter screen cleaning, and then the cake unloading is performed to continue the next round of filter pressing; thereby effectively improving the efficiency while avoiding the risk of contact between the filter cake and the cleaning liquid after filter pressing is completed;

[0030] 3. The mobile driving structure is arranged, the driving of the filter screen replacement structure is realized, and great driving torque is not needed, so that the service life of the mobile driving structure is guaranteed. BRIEF DESCRIPTION OF DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort on the basis of these drawings.

[0032] Figure 1 A perspective view of a filter press device for rare earth dehydration according to the present application Figure 1 ;

[0033] Figure 2 A front view of a filter press device for rare earth dehydration according to the present application

[0034] Figure 3 A left view of a filter press device for rare earth dehydration according to the present application

[0035] Figure 4 A schematic view of a mounting rack and its connecting structure

[0036] Figure 5 A perspective view of a filter press device for rare earth dehydration according to the present application Figure 2 ;

[0037] Figure 6 A schematic view of an alternate circulation filter screen and its connecting structure

[0038] Figure 7 A schematic view of a filter press plate and its connecting structure

[0039] Figure 8 A schematic view of a guide roller and its connecting structure

[0040] Figure 9 A Figure 4 enlarged view of A in FIG. 4

[0041] Figure 10 A Figure 5 enlarged view of B in FIG. 4

[0042] The reference signs in the drawings respectively represent:

[0043] 11, support frame; 12, mounting frame; 2, filter press mechanism; 21, filter plate; 211, liquid outlet hole; 212, liquid outlet pipeline; 22, filter frame; 221, liquid inlet hole; 23, hydraulic module; 231, hydraulic cylinder; 232, limiting rod; 233, hydraulic end plate; 24, asymmetric diaphragm structure; 241, diaphragm mounting cavity; 242, hydraulic diaphragm; 25, fixed end plate; 3, plate frame moving support mechanism; 31, opening and closing driving structure; 311, moving linear module one; 312, shifting plate trolley; 313, shifting plate one; 314, shifting plate two; 32, plate frame support structure; 321, support rail one; 322, sliding frame one; 323, pulling rope one; 4, alternating filter mechanism; 41, elastic guide structure; 411, mounting frame one; 412, guide rod; 413, spring one; 414, guide roller; 42, moving support structure; 421, sliding frame two; 423, support rail two; 424, mounting frame moving structure; 43, filter screen replacement structure; 431, mounting frame three; 432, driving roller; 433, pulley one; 44, movable driving structure; 441, moving linear module two; 442, horizontal linear module; 443, moving plate; 4441, moving rail; 4442, air cylinder; 4443, sliding block; 4444, spring two; 4445, sliding plate; 445, pulley two; 446, pulley three; 45, alternating circulating filter screen; 451, positioning baffle; 46, scraping structure; 461, fixed frame; 462, lateral scraper; 5, filter screen cleaning mechanism; 51, moving linear module three; 52, moving frame; 53, vertical linear module; 54, rotating disc; 55, cleaning pipeline; 56, nozzle. DETAILED DESCRIPTION

[0044] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the following will be combined with the accompanying drawings for the embodiments of the present application to make a clear and complete description of the technical solutions in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0045] In the following description, “left”, “right”, “front”, “back”, “up”, and “down” are oriented in the perspective of the front view.

[0046] Embodiment one: in some embodiments, referring to the accompanying drawings of the specification Figures 1-6 A filter press device for rare earth dehydration, comprising a support frame 11, a mounting frame 12, and a filter press mechanism 2; further comprising an alternating filter mechanism 4 and a filter screen cleaning mechanism 5;

[0047] As Figure 2 , Figure 5And Figure 6 As shown in the figure, the filter press mechanism 2 comprises filter plates 21, filter frames 22, a hydraulic module 23, an asymmetric diaphragm structure 24 and a fixed end plate 25, a plurality of filter plates 21 and filter frames 22 are arranged alternately between the hydraulic module 23 and the fixed end plate 25, and the asymmetric diaphragm structure 24 for secondary extrusion of filter cake is installed on the filter plate 21; the hydraulic module 23 is installed on the support rack 11, and the fixed end plate 25 is fixedly installed on the support rack 11;

[0048] The installation rack 12 is provided with a plate-frame moving support mechanism 3 for supporting and moving the filter plates 21 and the filter frames 22; and the installation rack 12 is fixedly provided with a conveying pipeline for conveying slurry into the filter frames 22.

[0049] As shown in the figure, Figure 3 , Figure 5 and Figure 6 As shown in the figure, the filter mechanism 4 comprises an elastic guide structure 41, a moving support structure 42, a filter screen replacement structure 43, a movable driving structure 44, an alternating circulating filter screen 45 and a scraping structure 46, the elastic guide structure 41 is installed on one side of the filter plate 21, the filter screen replacement structure 43 is installed on the other side of the filter plate 21, and the moving support structure 42 for supporting and moving the filter screen replacement structure 43 is installed on the installation rack 12; the movable driving structure 44 for driving the filter screen replacement structure 43 is installed on the installation rack 12; the alternating circulating filter screen 45 is sleeved outside the elastic guide structure 41 and the filter screen replacement structure 43; the scraping structure 46 for preliminarily cleaning the alternating circulating filter screen 45 is symmetrically fixedly installed on the filter screen replacement structure 43.

[0050] The rear side of the support rack 11 is provided with a filter screen cleaning mechanism 5 for cleaning the alternating circulating filter screen 45.

[0051] As shown in the figure, Figure 2 The plate-frame moving support mechanism 3 comprises an opening and closing driving structure 31 and a plate-frame support structure 32, the plate-frame support structure 32 for supporting the filter plates 21 and the filter frames 22 is installed on the installation rack 12, and the opening and closing driving structure 31 for moving the filter plates 21 and the filter frames 22 is installed on the installation rack 12.

[0052] The movable driving structure 44 can be provided in multiple groups.

[0053] In the present embodiment, when the rare earth dewatering filter press is in normal operation, the opening and closing driving structure 31 drives the plate and frame supporting structure 32 to move, thereby driving the filter plates 21 and the filter frames 22 to move and make the filter plates 21 and the filter frames 22 close to each other, and then the hydraulic module 23 and the fixed end plate 25 cooperate to press the multiple sets of filter plates 21 and filter frames 22 tightly; the slurry is delivered into the filter frames 22 through the external delivery pipeline, and the slurry is filtered through the alternating circulation filter screen 45 between the filter plates 21 and the filter frames 22;

[0054] After the filter cake is initially formed, the asymmetric diaphragm structure 24 is started to further extrude the filter cake, thereby further reducing the moisture content of the filter cake; due to the asymmetric arrangement of the asymmetric diaphragm structure 24, the filter cake is pushed to the space between the filter frame 22 and the filter plate 21, thereby avoiding the adhesion of the filter cake to the filter frame 22; after the extrusion is completed, the hydraulic module 23 is reset, the opening and closing driving structure 31 drives the plate and frame supporting structure 32 to move, thereby driving the filter plates 21 and the filter frames 22 to move one by one, and the moving supporting structure 42 drives the filter screen replacement structure 43 to move; after the filter plates 21 and the filter frames 22 are opened, part of the filter cake falls off;

[0055] Then the movable driving structure 44 moves to the filter screen replacement structure 43, the alternating circulation filter screen 45 is driven to move by the filter screen replacement structure 43, until the alternating circulation filter screen 45 at the filter screen replacement structure 43 is replaced between the filter plates 21 and the filter frames 22; in this process, the filter cake adhered to the alternating circulation filter screen 45 falls off when it moves to the elastic guide structure 41 and the scraping structure 46; at this time, the alternating circulation filter screen 45 between the filter plates 21 and the filter frames 22 is the part that has not been in contact with the slurry; thereby completing the rapid replacement of the filter screen; at this time, the filter cake is completely unloaded, the bottom of the support rack 11 can be shielded or the filter cake can be removed, thereby avoiding the mixing of the cleaning liquid with the filter cake;

[0056] Again, the opening and closing driving structure 31, the plate and frame supporting structure 32, the moving supporting structure 42 drive the filter plates 21, the filter frames 22 and the filter screen replacement structure 43 to move, so that the filter plates 21 and the filter frames 22 are close to each other; then the hydraulic module 23 and the fixed end plate 25 cooperate to press the multiple sets of filter plates 21 and filter frames 22 tightly; the slurry is delivered into the filter frames 22 through the external delivery pipeline, and the slurry is filtered through the alternating circulation filter screen 45 between the filter plates 21 and the filter frames 22; in this process, the alternating circulation filter screen 45 at the filter screen replacement structure 43 is cleaned by the filter screen cleaning mechanism 5;

[0057] Through the above mode, through the setting of the alternating circulation filter screen 45, the filter screen replacement structure 43, the elastic guide structure 41 and the movable driving structure 44, the processes of filter pressing, cake unloading and cleaning of the alternating circulation filter screen 45 originally performed in sequence are modified to be performed synchronously, and then the next round of filter pressing is continued after the cake unloading; thereby improving the efficiency while the filter cake after filter pressing does not have the risk of contacting the cleaning liquid.

[0058] Through the setting of the movable driving structure 44, the driving of the filter screen replacement structure 43 is realized, and a large driving torque does not need to be provided, thereby guaranteeing the service life of the movable driving structure 44.

[0059] Embodiment two: in some embodiments, as a preferred embodiment of the present application, as shown in the figure, the filter pressing plate 21 is provided with a liquid outlet hole 211, and a liquid outlet pipe 212 is fixedly installed on the lower side of the filter pressing plate 21, and the liquid outlet hole 211 is in communication with the liquid outlet pipe 212; Figures 5-7

[0060] The filter pressing frame 22 is provided with a liquid inlet hole 221 for liquid inlet, and the liquid inlet hole 221 is in communication with an external pump for conveying the slurry to be filter pressed through a conveying pipe;

[0061] The hydraulic module 23 comprises a hydraulic cylinder 231, a limiting rod 232 and a hydraulic end plate 233, a vertical machine plate is fixedly installed on the support rack 11, the hydraulic cylinder 231 is fixedly installed on the vertical machine plate, the output end of the hydraulic cylinder 231 is fixedly installed with the hydraulic end plate 233, and a plurality of limiting rods 232 are symmetrically fixedly installed on the hydraulic end plate 233, and the limiting rods 232 are in limiting sliding connection with the vertical machine plate;

[0062] The asymmetric diaphragm structure 24 comprises a hydraulic diaphragm 242, a diaphragm installation cavity 241 is formed in the middle of the filter pressing plate 21, two hydraulic diaphragms 242 are fixedly installed in the diaphragm installation cavity 241, and the two hydraulic diaphragms 242 are asymmetrically arranged in the diaphragm installation cavity 241; the hydraulic diaphragm 242 is in communication with an external hydraulic pump through a hose; one side of the hydraulic diaphragm 242 is located in the diaphragm installation cavity 241 when it is contracted and expanded; the other side of the hydraulic diaphragm 242 is located in the same horizontal plane as one side of the filter pressing plate 21 when it is contracted, and is located in the adjacent filter pressing frame 22 when it is expanded.

[0063] ​The hydraulic cylinder 231 drives the hydraulic end plate 233 to move horizontally under the limiting action of the limiting rod 232, so as to press the multiple groups of filter plates 21 and filter frames 22 between the limiting rod 232 and the fixed end plate 25; after the filter plates 21 and the filter frames 22 are tightly attached, the pump delivers the slurry from the liquid inlet hole 221 to the filter frame 22 through the delivery pipeline, and performs preliminary filter pressing; the solid in the slurry is blocked by the alternating circulation filter screen 45 between the filter plates 21 and the filter frames 22, and the liquid is discharged through the liquid outlet hole 211 and the liquid outlet pipeline 212 after passing through the alternating circulation filter screen 45, so as to realize preliminary filter pressing; then the hydraulic diaphragm 242 is inflated, the filter cake is further extruded through the hydraulic diaphragm 242, and at the same time, the asymmetric design of the hydraulic diaphragm 242 pushes the filter cake to the direction of the adjacent hydraulic diaphragm 242 on the other side, so as to damage the adhesion of the filter cake and the filter frame 22, and facilitate the falling of the filter cake.

[0064] As shown in Figure 4 , Figure 6 and Figure 9 , the opening and closing driving structure 31 includes a moving linear module one 311, a push plate trolley 312, a push plate one 313 and a push plate two 314. The moving linear module one 311 is fixedly installed on the mounting rack 12. The moving end of the moving linear module one 311 is fixedly installed with the push plate trolley 312. The push plate one 313 is hingedly connected to one side of the push plate trolley 312, and the push plate two 314 is hingedly connected to the other side of the push plate trolley 312. A torsional spring is sleeved on the hinging shaft of the push plate one 313 and the push plate trolley 312. The two elastic legs of the torsional spring are respectively in abutment with the push plate trolley 312 and the push plate one 313. A torsional spring is sleeved on the hinging shaft of the push plate two 314 and the push plate trolley 312. The two elastic legs of the torsional spring are respectively in abutment with the push plate trolley 312 and the push plate two 314.

[0065] The plate and frame supporting structure 32 includes a supporting rail one 321, a sliding frame one 322 and a pulling rope one 323. Two supporting rail ones 321 are fixedly installed on the mounting rack 12. The sliding frame one 322 is symmetrically fixedly installed on the filter plate 21 and the filter frame 22. The sliding frame one 322 is limited to slide on the supporting rail one 321. One end of the pulling rope one 323 is fixedly connected with the filter plate 21, and the other end of the pulling rope one 323 is fixedly connected with the adjacent filter frame 22.

[0066] The moving linear module 311 drives the dial plate trolley 312 to move, thereby driving the dial plate one 313 and the dial plate two 314 to move; when moving in one direction, the dial plate two 314 is in contact with the sliding frame one 322, the dial plate two 314 is first pressed down by the sliding frame one 322, the torsion spring between the dial plate two 314 and the dial plate trolley 312 is twisted, and then the dial plate two 314 is reset after the dial plate two 314 is separated from the sliding frame one 322, at this time, the end surface of the dial plate two 314 is in contact with the side edge of the sliding frame one 322; the moving linear module 311 drives the dial plate trolley 312 to drive the sliding frame one 322 to move horizontally under the support of the support rail one 321 through the dial plate one 313 and the dial plate two 314; the connecting rope one 323 is arranged between the sliding frame one 322, the adjacent sliding frame one 322 is driven to move horizontally through the connecting rope one 323, thereby driving the filter plate 21 and the filter frame 22 to move horizontally.

[0067] When moving in the other direction, the dial plate one 313 is in contact with the sliding frame one 322, the dial plate one 313 is first pressed down by the sliding frame one 322, the torsion spring between the dial plate one 313 and the dial plate trolley 312 is twisted, and then the dial plate one 313 is reset after the dial plate one 313 is separated from the sliding frame one 322, at this time, the end surface of the dial plate one 313 is in contact with the side edge of the sliding frame one 322; the moving linear module 311 drives the dial plate trolley 312 to drive the sliding frame one 322 to move horizontally under the support of the support rail one 321 through the dial plate one 313 and the dial plate two 314; the connecting rope one 323 is arranged between the sliding frame one 322, the adjacent sliding frame one 322 is driven to move horizontally through the connecting rope one 323, thereby driving the filter plate 21 and the filter frame 22 to move horizontally.

[0068] As shown in Figure 4 , Figures 6-8 and Figure 10 , the elastic guide structure 41 comprises a mounting frame one 411, a guide rod 412, a spring one 413 and a guide roller 414, the guide rod 412 is fixedly and uniformly installed on the mounting frame one 411 at equal intervals, the guide rod 412 is provided with the spring one 413, the guide rod 412 is limitingly and slidably connected with one side of the filter plate 21, one end of the spring one 413 is fixedly connected with the mounting frame one 411, and the other end of the spring one 413 is fixedly connected with the filter plate 21; the guide roller 414 is rotatably installed on the mounting frame one 411;

[0069] The moving support structure 42 comprises a sliding frame two 421, a support rail two 423 and a mounting frame moving structure 424, two support rail twos 423 are fixedly installed on the mounting rack 12, and a plurality of sliding frame twos 421 are limitingly and slidably installed on the support rail two 423; the mounting rack moving structure 424 for driving the sliding frame two 421 to move is fixedly installed on the mounting rack 12;

[0070] The filter screen replacement structure 43 comprises a mounting frame three 431, a driving roller 432 and a pulley one 433, the mounting frame three 431 is fixedly installed on the other side of the filter plate 21, the driving roller 432 is rotatably installed on the mounting frame three 431, and the pulley one 433 is rotatably installed on the mounting frame three 431; the driving roller 432 is fixedly connected with the pulley one 433; the mounting frame three 431 is fixedly connected with the sliding frame two 421;

[0071] The mobile driving structure 44 comprises a mobile linear module two 441, a horizontal linear module 442, a mobile plate 443, an elastic mobile module and a pulley two 445, the mobile linear module two 441 is fixedly installed on the mounting rack 12, the mobile end of the mobile linear module two 441 is fixedly installed with the horizontal linear module 442, and the mobile end of the horizontal linear module 442 is fixedly installed with the mobile plate 443; two pulley twos 445 are rotatably installed on the mobile plate 443; the elastic mobile module is installed on the mobile plate 443, the mobile end of the elastic mobile module is installed with a pulley three 446; the mobile plate 443 is fixedly installed with a driving motor for driving one of the pulley twos 445 to rotate, and the pulley three 446 and the two pulley twos 445 are driven through a transmission belt;

[0072] The elastic mobile module comprises a mobile guide rail 4441, a gas cylinder 4442, a sliding block 4443, a spring two 4444, a sliding plate 4445 and a telescopic rod, the mobile guide rail 4441 is fixedly installed on the mobile plate 443, the gas cylinder 4442 is fixedly installed on the mobile plate 443, and the sliding block 4443 and the sliding plate 4445 are limitingly slid on the mobile guide rail 4441; one end of the telescopic rod is fixedly connected with the sliding block 4443, the other end of the telescopic rod is fixedly connected with the sliding plate 4445; the spring two 4444 is sleeved outside the telescopic rod, one end of the spring two 4444 is limitingly and slidably connected with the sliding block 4443, and the other end of the spring two 4444 is fixedly connected with the sliding plate 4445; the output end of the gas cylinder 4442 is fixedly connected with the sliding block 4443.

[0073] The alternating circulation type filter screen 45 is sleeved outside the guide roller 414, the filter plate 21, the mounting frame three 431 and the driving roller 432, and is in rolling connection with the guide roller 414 and the driving roller 432 respectively; the positioning baffle 451 is fixedly installed on the alternating circulation type filter screen 45.

[0074] The scraping structure 46 comprises a fixed frame 461 and a lateral scraper 462, the fixed frame 461 is fixedly installed on the mounting frame three 431, and the lateral scraper 462 for scraping the filter cake on the alternating circulation type filter screen 45 is fixedly installed on the fixed frame 461.

[0075] The distance between the mounting frame one 411 and the filter plate 21 is adjusted by the multiple sets of springs one 413 and the guide rod 412 through the state of the external alternating circulation filter screen 45, thereby adjusting the position of the guide roller 414, so that the alternating circulation filter screen 45 between the guide roller 414 and the driving roller 432 is tensioned; the driving roller 432 and the pulley one 433 are supported by the mounting frame three 431, and the mounting frame three 431 is supported by the sliding frame two 421 and the supporting guide rail two 423; the mounting frame moving structure 424 assists in driving the mounting frame three 431 to move with the filter plate 21 through the elastic guide structure 41; after the filter plate 21 and the filter frame 22 are separated, part of the filter cake falls off, and part of the filter cake is adhered to the alternating circulation filter screen 45;

[0076] At this time, the moving linear module two 441 drives the horizontal linear module 442 and the moving plate 443 to move horizontally, so that the two pulley twos 445 on the moving plate 443 move to the two sides corresponding to the pulley one 433; the horizontal linear module 442 drives the moving plate 443 to move horizontally, so that the two pulley twos 445 move to the other side of the pulley one 433, and in this process, the belt between the two pulley twos 445 is attached to the pulley one 433, and at the same time, the sliding block 4443 is driven by the air cylinder 4442 to move horizontally, thereby driving the sliding plate 4445 to move horizontally through the spring two 4444, so that the pulley three 446 on the sliding plate 4445 moves horizontally, the distance between the pulley two 445 and the pulley three 446 is adjusted, so that the belt between the pulley two 445 and the pulley three 446 can be wound outside the pulley one 433, and the belt is always tensioned through the adjustment of the air cylinder 4442, the sliding block 4443, the spring two 4444 and the sliding plate 4445;

[0077] The motor drives one of the pulley twos 445 to rotate, thereby driving the pulley two 445, the pulley three 446 and the pulley one 433 to rotate through the belt, the pulley one 433 drives the driving roller 432 to rotate, thereby driving the alternating circulation filter screen 45 between the driving roller 432 and the guide roller 414 to move, until the positioning baffle 451 on the alternating circulation filter screen 45 is blocked by the fixed frame 461 on the other side; at this time, the alternating circulation filter screen 45 between the filter plate 21 and the filter frame 22 is moved to the mounting frame three 431 and the driving roller 432; in this process, the filter cake on the alternating circulation filter screen 45 is separated from the alternating circulation filter screen 45 when it moves to the guide roller 414; when the alternating circulation filter screen 45 moves under the fixed frame 461, the residual filter cake on the alternating circulation filter screen 45 is scraped off by the side scraper 462, realizing the overall unloading of the filter cake.

[0078] As Figure 3As shown, the filter screen cleaning mechanism 5 includes a moving linear module three 51, a moving frame 52, a vertical linear module 53, a rotating disc 54, a cleaning pipeline 55 and a nozzle 56, the moving linear module three 51 is fixedly installed on the support frame 11, the moving end of the moving linear module three 51 is fixedly installed with the moving frame 52, the moving frame 52 is fixedly installed with the vertical linear module 53, the moving end of the vertical linear module 53 is rotatably installed with the rotating disc 54 driven by a servo motor; the rotating disc 54 is fixedly connected with the end of the cleaning pipeline 55, a plurality of nozzles 56 are fixedly installed on the cleaning pipeline 55; the nozzle 56 is communicated with the pump outside for conveying cleaning liquid through the cleaning pipeline 55 and the hose.

[0079] When the filter press plate 21 and the filter press frame 22 are tightly attached and pressure filtration is performed, at this time the moving linear module three 51 drives the vertical linear module 53 to move horizontally through the moving frame 52, until the cleaning pipeline 55 moves to a position aligned between two alternating circulation type filter screens 45, the rotating disc 54 drives the cleaning pipeline 55 and the nozzle 56 to rotate, so that the cleaning pipeline 55 and the nozzle 56 are rotated between adjacent alternating circulation type filter screens 45, the external pump sprays the cleaning liquid through the nozzle 56 after the cleaning liquid passes through the hose and the cleaning pipeline 55, so that the alternating circulation type filter screen 45 is cleaned through the nozzle 56; repeat this action, instruct all alternating circulation type filter screens 45 to be cleaned; the cleaning work of one side alternating circulation type filter screen 45 is synchronized with the pressure filtration of the other side, so that the overall pressure filtration efficiency is improved.

[0080] In some embodiments, as shown in Figures 1-10 As a preferred embodiment of the present application, a rare earth pressure filtration method includes the following steps:

[0081] Step one: the opening and closing driving structure 31 drives the plate and frame supporting structure 32 to move, thereby driving the filter press plate 21 and the filter press frame 22 to move, so that the filter press plate 21 and the filter press frame 22 are tightly attached, and then a plurality of groups of filter press plates 21 and filter press frames 22 are tightly pressed through the cooperation of the hydraulic module 23 and the fixed end plate 25; the slurry is transported into the filter press frame 22 through the external conveying pipeline, and the slurry is filtered through the alternating circulation type filter screen 45 between the filter press plate 21 and the filter press frame 22;

[0082] Step two: after the filter cake is initially formed, the asymmetric diaphragm structure 24 is started to further extrude the filter cake, so as to further reduce the moisture content of the filter cake; after the extrusion is completed, the hydraulic module 23 is reset, the opening and closing driving structure 31 drives the plate and frame supporting structure 32 to move, thereby driving the filter press plate 21 and the filter press frame 22 one by one to move, at the same time, the moving supporting structure 42 drives the filter screen replacement structure 43 to move; after the filter press plate 21 and the filter press frame 22 are opened, part of the filter cake falls off;

[0083] Step three: the mobile driving structure 44 moves to the filter screen replacement structure 43, and the filter screen replacement structure 43 drives the alternating circulation filter screen 45 to move until the alternating circulation filter screen 45 at the filter screen replacement structure 43 is replaced between the filter plate 21 and the filter frame 22; in this process, the filter cake adhered to the alternating circulation filter screen 45 is dropped when moving to the elastic guide structure 41 and the scraping structure 46; at this time, the alternating circulation filter screen 45 between the filter plate 21 and the filter frame 22 is the part not contacted with the slurry;

[0084] Step four: repeat step one; in this process, the filter screen replacement structure 43 of the alternating circulation filter screen 45 is cleaned by the filter screen cleaning mechanism 5.

[0085] The above embodiments are only used to illustrate the technical solutions of the present application, but not limit it; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced by equivalents; and these modifications or replacements will not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A filter press device for rare earth dehydration, comprising a support frame (11), a mounting frame (12) and a filter press mechanism (2), characterized in that: It also includes an alternating filter mechanism (4); The filter press mechanism (2) comprises a filter plate (21), a filter frame (22), a hydraulic module (23), an asymmetric diaphragm structure (24) and a fixed end plate (25), a plurality of filter plates (21) and filter frames (22) are arranged alternately between the hydraulic module (23) and the fixed end plate (25), and the asymmetric diaphragm structure (24) for secondary extrusion of filter cake is installed on the filter plate (21); the hydraulic module (23) is installed on the support rack (11), and the fixed end plate (25) is fixedly installed on the support rack (11); The plate and frame moving support mechanism (3) is installed on the mounting rack (12); the conveying pipeline for conveying slurry into the filter frame (22) is fixedly installed on the mounting rack (12); The alternating filter mechanism (4) comprises an elastic guide structure (41), a moving support structure (42), a filter screen replacement structure (43), a movable driving structure (44), an alternating circulating filter screen (45) and a scraping structure (46), the elastic guide structure (41) is installed on one side of the filter plate (21), the filter screen replacement structure (43) is installed on the other side of the filter plate (21), and the moving support structure (42) is installed on the mounting rack (12); the movable driving structure (44) for driving the filter screen replacement structure (43) is installed on the mounting rack (12); the alternating circulating filter screen (45) is sleeved outside the elastic guide structure (41) and the filter screen replacement structure (43); the scraping structure (46) is fixedly installed on the filter screen replacement structure (43) in a symmetrical manner; The filter screen cleaning mechanism (5) for cleaning the alternating circulating filter screen (45) is installed on the rear side of the support rack (11).

2. The filter press device for dewatering rare earths according to claim 1, characterized by The plate and frame moving support mechanism (3) comprises an opening and closing driving structure (31) and a plate and frame support structure (32), the plate and frame support structure (32) for supporting the filter plate (21) and the filter frame (22) is installed on the mounting rack (12), and the opening and closing driving structure (31) for driving the filter plate (21) and the filter frame (22) to move is installed on the mounting rack (12).

3. The filter press device for dewatering rare earths according to claim 2, characterized by The asymmetric diaphragm structure (24) comprises a hydraulic diaphragm (242), a diaphragm installation cavity (241) is formed in the middle of the filter plate (21), two hydraulic diaphragms (242) are fixedly installed in the diaphragm installation cavity (241), and the two hydraulic diaphragms (242) are asymmetrically arranged in the diaphragm installation cavity (241); the hydraulic diaphragm (242) is communicated with an external hydraulic pump through a hose; the one-side hydraulic diaphragm (242) is located in the diaphragm installation cavity (241) when it is contracted and after it is expanded; the other-side hydraulic diaphragm (242) is located on the same horizontal plane as one side of the filter plate (21) when it is contracted, and is located in the adjacent filter frame (22) when it is expanded.

4. The filter press device for dewatering rare earths according to claim 3, characterized by The elastic guide structure (41) comprises a mounting frame one (411), guide rods (412), springs one (413) and guide rollers (414), the mounting frame one (411) is uniformly and fixedly provided with the guide rods (412) at equal intervals, the guide rods (412) are provided with the springs one (413), the guide rods (412) are limitingly and slidably connected with one side of the filter plate (21), one end of the springs one (413) is fixedly connected with the mounting frame one (411), and the other end of the springs one (413) is fixedly connected with the filter plate (21); the mounting frame one (411) is rotatably provided with the guide rollers (414).

5. The filter press device for dewatering rare earths according to claim 4, characterized by The filter screen replacing structure (43) comprises a mounting frame three (431), a driving roller (432) and a belt pulley one (433), the mounting frame three (431) is fixedly installed on the other side of the filter plate (21), the mounting frame three (431) is rotatably provided with the driving roller (432), and the mounting frame three (431) is rotatably provided with the belt pulley one (433); the driving roller (432) is fixedly connected with the belt pulley one (433); and the mounting frame three (431) is connected with the movable support structure (42).

6. The filter press device for dewatering rare earths according to claim 5, characterized by The movable driving structure (44) comprises a movable linear module two (441), a horizontal linear module (442), a movable plate (443), an elastic moving module and a belt pulley two (445), the movable linear module two (441) is fixedly installed on the mounting rack (12), a movable end of the movable linear module two (441) is fixedly installed with the horizontal linear module (442), and a movable end of the horizontal linear module (442) is fixedly installed with the movable plate (443); two belt pulley twos (445) are rotatably installed on the movable plate (443); the elastic moving module is installed on the movable plate (443), and a movable end of the elastic moving module is provided with a belt pulley three (446); the movable plate (443) is fixedly installed with a driving motor for driving one of the belt pulley twos (445) to rotate, and the belt pulley three (446) and the two belt pulley twos (445) are driven through transmission belts.

7. The filter press device for dewatering rare earths according to claim 6, characterized by The elastic moving module comprises a moving guide rail (4441), an air cylinder (4442), a sliding block (4443), a spring two (4444), a sliding plate (4445) and a telescopic rod, the moving guide rail (4441) is fixedly installed on the movable plate (443), the air cylinder (4442) is fixedly installed on the movable plate (443), and the sliding block (4443) and the sliding plate (4445) are limitingly and slidably arranged on the moving guide rail (4441); one end of the telescopic rod is fixedly connected with the sliding block (4443), and the other end of the telescopic rod is fixedly connected with the sliding plate (4445); the spring two (4444) is sleeved outside the telescopic rod, one end of the spring two (4444) is limitingly and slidably connected with the sliding block (4443), and the other end of the spring two (4444) is fixedly connected with the sliding plate (4445); and an output end of the air cylinder (4442) is fixedly connected with the sliding block (4443).

8. The filter press device for dewatering rare earths according to claim 7, characterized by The alternating circulation filter screen (45) is sleeved outside the guide roller (414), the filter plate (21), the mounting frame three (431) and the driving roller (432), and is in rolling connection with the guide roller (414) and the driving roller (432) respectively; the alternating circulation filter screen (45) is fixedly provided with the positioning baffle (451).

9. The filter press device for dewatering rare earths according to claim 8, characterized by The filter screen cleaning mechanism (5) comprises a moving linear module three (51), a moving frame (52), a vertical linear module (53), a rotating disc (54), a cleaning pipeline (55) and a nozzle (56), the moving linear module three (51) is fixedly installed on the support frame (11), the moving end of the moving linear module three (51) is fixedly installed with the moving frame (52), the moving frame (52) is fixedly installed with the vertical linear module (53), and the moving end of the vertical linear module (53) is rotatably installed with the rotating disc (54) driven by a servo motor; the rotating disc (54) is fixedly connected with the end of the cleaning pipeline (55), a plurality of nozzles (56) are fixedly installed on the cleaning pipeline (55); the nozzle (56) is in communication with the pump outside for conveying cleaning liquid through the cleaning pipeline (55) and the hose.

10. A rare earth filter pressing method using the rare earth dewatering filter pressing apparatus according to claim 9, characterized by, The method comprises the following steps: Step one: the opening and closing driving structure (31) drives the filter plate (21) and the filter frame (22) to move through the plate-frame support structure (32), so that the filter plate (21) and the filter frame (22) are tightly attached, and then a plurality of filter plates (21) and filter frames (22) are tightly pressed through the cooperation of the hydraulic module (23) and the fixed end plate (25); the slurry is conveyed into the filter frame (22) through the external conveying pipeline, and the slurry is filtered through the alternating circulation filter screen (45) between the filter plate (21) and the filter frame (22); Step two: after the filter cake is initially formed, the asymmetric diaphragm structure (24) is started to further extrude the filter cake; after the extrusion is completed, the hydraulic module (23) is reset, and the opening and closing driving structure (31) drives the filter plate (21) and the filter frame (22) to move one by one through the plate-frame support structure (32); Step three: the moving driving structure (44) drives the alternating circulation filter screen (45) to move through the filter screen replacement structure (43) until the alternating circulation filter screen (45) at the filter screen replacement structure (43) is replaced between the filter plate (21) and the filter frame (22); the filter cake adhered to the alternating circulation filter screen (45) falls off when moving to the elastic guide structure (41) and the scraping structure (46); at this time, the alternating circulation filter screen (45) between the filter plate (21) and the filter frame (22) is not in contact with the slurry; Step four: repeat step one; in this process, the alternating circulation filter screen (45) at the filter screen replacement structure (43) is cleaned through the filter screen cleaning mechanism (5).

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