Plate filter for chemical production

Abstract

The invention relates to the technical field of plate filters, and provides a plate filter for chemical production, which comprises a filter frame, a plurality of supporting blocks are arranged on the filtering frame in a sliding mode and are sequentially arranged in the sliding direction of the supporting blocks, a filtering frame is connected to each supporting block in a shaking mode, filtering cloth is arranged in each filtering frame, the filtering frames are configured to enable solid residues on the filtering cloth to fall off after shaking, an elastic piece is arranged between every two adjacent supporting blocks, and the elastic pieces are connected with the supporting blocks in a shaking mode. The elastic pieces elastically push the supporting blocks so that every two adjacent supporting blocks can be far away from each other. And the two pressing plates are arranged on the filtering frame and slide relatively. According to the technical scheme, the technical problems that in the related technology, in the process of taking out the filter cakes, the filter plates are separated one by one to enable solid impurities (filter cakes) to fall off, the requirement for rapid pollution discharge is not met, and solid residues which are difficult to clean still can be left on the filter cloth are solved.

Description

Technical Field

[0001] Embodiments of the present disclosure relate to the technical field of plate filters, and specifically, to a plate filter for chemical production. Background Art

[0002] Currently, when producing chemical products such as polyether polyols, preparations for the crude reaction are first carried out. The polymerization reaction kettle is repeatedly replaced with nitrogen, glycerol and fat paste are pumped into the reaction kettle, stirring is started and the temperature is raised to carry out the crude reaction. After the crude polyether polyol is produced, it needs to be refined, and finally the refined product is filtered to filter out the refined polyether polyol liquid.

[0003] Since polyether polyols have high requirements for product quality, equipment with a high filtration accuracy is needed to complete the filtration operation of the refined product. Therefore, plate filters are usually used. Their large filter chamber space can accommodate more impurities, and the filter cloth linearly arranged in the filter chamber space composed of several filter frames can achieve a good interception effect on impurities of different shapes and properties. While meeting the filtration accuracy requirements, it can also ensure the continuity of production.

[0004] Specifically, a plate filter is composed of multiple filter cloths and filter frames. By sequentially pressing several filter frames, a continuous filter chamber space is formed. During the filtration process, the crude polyether polyol passes through the filter cloth under pressure and the refined polyether polyol liquid flows out, while the solid impurities are left on the filter cloth in the filter frame.

[0005] After the filtration is completed, each filter frame is separated in sequence to facilitate the removal of the solid impurities (filter cake) on the filter cloth. However, in the process of removing the filter cake, the following problems still exist: Although the filter cake can fall off the filter cloth under the action of its own gravity after the filter frames are separated, the method of processing the filter plates one by one has room for improvement in efficiency. Even if a quick-opening pull plate can be used to separate multiple filter frames in one action (adjacent filter frames are connected by a chain, and pulling one filter frame can gradually pull open the other filter frames), it still does not meet the requirements of rapid sewage discharge, and it is inevitable that solid residues will remain on the filter cloth and are not easy to fall off. Summary of the Invention

[0006] To overcome the above defects, embodiments of the present disclosure provide a plate filter for chemical production, which solves the technical problems that in the related art, the method of separating the filter plates one by one to make the solid impurities (filter cake) fall off during the process of removing the filter cake does not meet the requirements of rapid sewage discharge, and there will still be solid residues that are difficult to clean on the filter cloth.

[0007] According to one aspect, at least one embodiment of the present disclosure provides a plate filter for chemical production, including: A filter rack; A plurality of support blocks, a plurality of the support blocks are all slidably arranged on the filter rack and are arranged in sequence along the sliding direction of the support blocks. A filter frame is swingably connected to each support block, and a filter cloth is arranged in each filter frame. The filter frame is configured to make the solid residues on the filter cloth fall off after swinging. An elastic member is arranged between two adjacent support blocks, and the elastic member elastically pushes the support blocks to make two adjacent support blocks move away from each other; Two pressing plates, the two pressing plates are both arranged on the filter rack and slide relative to each other. A plurality of the support blocks are all located between the two pressing plates, and the pressing plates are used to press a plurality of the filter frames to form a filtering space; Wherein, the pressing plate is configured to loosen the filter frame after sliding, so that every two adjacent filter frames move away from each other synchronously.

[0008] For example, in a plate filter for chemical production provided by at least one embodiment of the present disclosure, the sliding direction of the support block is horizontal, the swinging direction of the filter frame is parallel to the sliding direction of the support block, a sliding groove is formed in the outer wall of the filter frame, and one end of the support block is slidably arranged in the sliding groove.

[0009] For example, in a plate filter for chemical production provided by at least one embodiment of the present disclosure, a guiding column is arranged horizontally in the sliding groove, the guiding column penetrates through the support block, compression springs are sleeved at both ends of the guiding column, one end of the compression spring is connected to the support block, and the other end is connected to the filter frame.

[0010] For example, in a plate filter for chemical production provided by at least one embodiment of the present disclosure, a force-receiving portion is arranged on the outer wall of each filter frame, an elastic stopper is arranged on the filter rack, the elastic stopper is located on one side of the force-receiving portion, and the filter frame is configured to swing on the support block after sliding along with the support block and passing by the elastic stopper.

[0011] For example, in a plate filter for chemical production provided by at least one embodiment of the present disclosure, the two pressing plates are both slidably arranged on the filter rack and both have pressing grooves, the pressing grooves are located on the adjacent sides of the two pressing plates, and the pressing plates are used to press a plurality of the filter frames between the two pressing grooves to form the filtering space.

[0012] For example, in a plate filter for chemical production provided by at least one embodiment of the present disclosure, locking bolts for locking the support blocks are arranged at both ends of the filter rack to change the sliding range of the support blocks, and a plurality of the support blocks are all located between the two locking bolts.

[0013] For example, in a plate filter for chemical production provided by at least one embodiment of the present disclosure, a guide rod is further provided through each of the support blocks, the elastic member is sleeved on the guide rod, two ends of the elastic member are respectively connected to adjacent two support blocks in a one-to-one correspondence, and adjacent two of the elastic members are arranged in a staggered manner.

[0014] For example, in a plate filter for chemical production provided by at least one embodiment of the present disclosure, a limit post is further provided on each of the support blocks by threading, the limit post and the guide rod are symmetrically arranged, and the support block is configured to abut against the limit post on the adjacent support block after sliding, so as to limit the minimum distance between adjacent two support blocks.

[0015] For example, in a plate filter for chemical production provided by at least one embodiment of the present disclosure, the support block is in a frame shape, and the filter rack has a guiding portion, and the guiding portion penetrates through the support block.

[0016] For example, in a plate filter for chemical production provided by at least one embodiment of the present disclosure, a recovery box is provided at the bottom of the filter rack, and the recovery box is located directly below a plurality of the filter frames for receiving solid residues.

[0017] The beneficial effects of the embodiments of the present disclosure are as follows: 1. High-efficiency sewage discharge: The traditional method of individually processing filter plates to remove filter cakes is inefficient. After the pressing plate of this plate filter slides to release the filter frame, several groups of adjacent filter frames can move away from each other synchronously. Then, the solid impurities (filter cakes) in each filter frame can simultaneously fall off the filter frame under their own weight. By using the quick-opening pull plate to separate multiple filter frames one by one with a single action in a timely manner, its sewage discharge speed is not lower than that of this plate filter, improving the sewage discharge efficiency.

[0018] 2. Reducing residue retention: The filter frames on each support block can shake, and after shaking, the solid residues on the filter cloth can fall off. In the traditional method, it is inevitable that solid residues remain on the filter cloth and are inconvenient to fall off, while this design effectively solves this problem, ensuring a higher cleanliness of the filter cloth, thereby improving the subsequent filtering effect and guaranteeing the quality of the polyether polyol product. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the following will briefly introduce the drawings required for the description of the embodiments of the present disclosure. Obviously, the drawings in the following description are only some exemplary embodiments of the present disclosure. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the content of the exemplary embodiments of the present disclosure and these drawings.

[0020] Figure 1 It is a filtration state diagram of a plate filter for chemical production in an embodiment of the present disclosure; Figure 2 In the embodiment of Figure 1 is the impurity removal state diagram of a plate filter for chemical production; Figure 3 In the embodiment of Figure 1 is the structural schematic diagram of the filter frame; Figure 4 In the embodiment of Figure 1 is the connection diagram of the support block and the filter frame; Figure 5 In the embodiment of Figure 4 is the structural schematic diagram of the guide post; Figure 6 In the embodiment of Figure 1 is the structural schematic diagram of a plate filter for chemical production; Figure 7 In the embodiment of Figure 1 is the cooperation diagram of the filter frame and the pressing plate; Figure 8 In the embodiment of Figure 7 is the enlarged view of part A in Figure 9 In the embodiment of Figure 7 is the partial enlarged view; Figure 10 In the embodiment of Figure 9 is the enlarged view of part B in Figure 11 In the embodiment of Figure 1 is the state diagram of the support blocks approaching each other; Figure 12 In the embodiment of Figure 1 is the state diagram of the support blocks moving away from each other; Figure 13 In the embodiment of Figure 1 is the filtration state diagram of a plate filter for chemical production at another position.

[0021] In the figure: 1. Filter rack, 2. Support block, 3. Filter frame, 301. Slide groove, 302. Stress part, 4. Filter cloth, 5. Elastic member, 6. Pressing plate, 601. Pressing groove, 7. Guide post, 8. Compression spring, 9. Elastic stop block, 10. Locking bolt, 11. Guide rod, 12. Limit post, 13. Guide part, 14. Recycling box. Detailed implementation manners

[0022] The present disclosure will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present disclosure, rather than limiting the present disclosure.

[0023] To simplify the drawings, only the parts related to the disclosure are schematically shown in each figure, and they do not represent the actual structure of the product. Additionally, to simplify the drawings for easier understanding, in some figures, only one of the components with the same structure or function is schematically shown, or only one of them is labeled. In this text, "one" not only means "only this one" but also can mean "more than one", and "several" includes "two" and "more than two".

[0024] In this text, it should be noted that unless otherwise clearly defined and limited, the terms "install", "connect", and "join" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in this disclosure can be understood according to specific circumstances.

[0025] In this disclosure, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature can include the direct contact between the first and second features, or can also include the situation where the first and second features are not in direct contact but in contact through other features between them. Moreover, the first feature being "above", "over", and "on top of" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is at a higher horizontal level than the second feature. The first feature being "under", "beneath", and "underneath" the second feature includes the first feature being directly below and obliquely below the second feature, or simply indicating that the first feature is at a lower horizontal level than the second feature.

[0026] In the description of this embodiment, the orientation or positional relationships such as "up", "down", "left", and "right" are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to this disclosure.

[0027] In addition, in the description of this application, the terms "first", "second", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0028] Such as Figures 1 to 3As shown, it shows a plate filter for chemical production in an embodiment of the present disclosure. This plate filter utilizes a synchronous separation design and combines the shaking function of the filter plate to greatly improve the sewage discharge efficiency. Although the traditional quick-opening pull plate can gradually open multiple filter frames 3 in one action, the adjacent filter frames 3 do not move away from each other synchronously. However, through the cooperation of the elastic member 5 and the support block 2, after the pressing plate 6 releases the filter frame 3, several groups of adjacent filter frames 3 move away from each other synchronously, causing a large amount of solid impurities (filter cakes) in the filtering space to fall simultaneously. Moreover, the shaking design of the filter frame 3 of this filter is like adding a "shaking cleaning" function to the filter cloth 4. During the process of several groups of adjacent filter frames 3 moving away from each other synchronously, the filter frame 3 shakes automatically, which can effectively remove the solid impurities (filter cakes) remaining on the filter cloth 4 in the filter frame 3.

[0029] Specifically, the filter rack 1 serves as the support structure of the entire filter, providing a basic platform for the installation and operation of other components; a plurality of support blocks 2 are all slidably arranged on the filter rack 1 and are arranged in sequence along the sliding direction. The sliding can be achieved by the cooperation of a slide rail and a slider, and the synchronous separation is realized by using a traditional equal-distance adjustment structure. For example, a rotating rod is rotatably arranged on the filter rack 1, and a plurality of spiral grooves are opened on its side wall along the axial direction of its rotating shaft. A protrusion connected to the spiral groove is provided on the support block 2 slidably connected to the filter rack 1. The pitches of the plurality of spiral grooves are different. After the pressing plate 6 releases the filter frame 3, the rotation of the rotating rod can drive several support blocks 2 to separate from each other synchronously, and vice versa to move closer to each other synchronously; further, in order to realize the shaking connection between the support block 2 and the filter frame 3, magnetism can be used. First, a groove for the support block 2 to reciprocate by using a spring needs to be opened on each filter frame 3 to form a shaking effect between the two. For example, if the support block 2 slides horizontally, the filter frame 3 can form a vertical shaking effect with it. A magnetic strip is welded on the filter rack 1 above the filter frame 3. The magnetic strip has a plurality of positive and negative poles arranged alternately horizontally, and magnetic blocks capable of approaching the positive pole or moving away from the negative pole are installed at the corresponding positions on the top of each filter frame 3. Then, after the pressing plate 6 releases the filter frame 3, during the process of each filter frame 3 sliding horizontally driven by the support block 2, under the action of the positive and negative poles of the magnetic strip and the resetting action of the spring, vertical reciprocation is realized, enabling the filter frame 3 to shake flexibly on the support block 2, facilitating the cleaning of solid impurities (filter cakes). The filter cloth 4 in the filter frame 3 is used to filter impurities in the polyether polyol to form solid impurities (filter cakes); for the feeding form, a feed pipe and a discharge pipe can be respectively and correspondingly connected to the two pressing plates 6. The feed pipe and the discharge pipe are respectively and correspondingly located on the opposite sides of the two pressing plates 6. After forming a filtering space, crude polyether polyol can be pumped in through the feed pipe, and finally refined polyether polyol liquid is discharged from the discharge pipe.

[0030] In addition, regarding the synchronous separation structure of multiple support blocks 2, to simplify the above structure, an elastic member 5 is finally selected to be arranged between two adjacent support blocks 2, with both ends fixed to the two adjacent support blocks 2 respectively. It elastically pushes the support blocks 2, enabling the two adjacent support blocks 2 to move away from each other, facilitating the rapid shedding of solid impurities (filter cakes), and also saving costs.

[0031] Both pressing plates 6 are arranged on the filter rack 1 and slide relative to each other, enabling at least one pressing plate 6 to slide. Then, when filtration is required, a driving device (hydraulic cylinder, air cylinder or electric push rod) pushes the pressing plate 6 to press a plurality of filter frames 3 in the middle to form a filtration space, and crude polyether polyol is introduced into it. When it is necessary to clean the filter cake, the driving device is used again to make the pressing plate 6 slide to loosen the filter frames 3.

[0032] As Figures 1 to 2 shown, in some examples, the sliding direction of the support block 2 is generally horizontal, and the shaking direction of the filter frame 3 is also parallel to this horizontal sliding direction. Therefore, the shaking action and separation action of the filter frame 3 can cooperate with each other. While the filter frame 3 is horizontally separated, it shakes horizontally, enhancing the inertial force received by the filter cake, which is more conducive to the shedding of solid impurities (filter cakes). And if the shaking direction is not parallel to the sliding direction of the support block 2, additional component forces may be generated, interfering with the separation of the filter frame 3 and the stability of the overall structure. For example, vertical shaking may cause the filter frame 3 to tilt or get stuck during horizontal separation. And the way this plate - type filter introduces crude polyether polyol into the filtration space is generally through a horizontal feed pipe, which penetrates several filter frames 3. Then, vertical shaking will also interfere with the horizontal feed pipe.

[0033] One end of the support block 2 slides in the chute 301 on the outer wall of the filter frame 3, which makes the horizontal shaking of the filter frame 3 more stable, provides a limiting and guiding function, and simplifies the structure.

[0034] As Figures 3 to 5 shown, in some examples, the guide post 7 is horizontally arranged in the chute 301 and penetrates the support block 2, further providing a clear guiding function for the horizontal shaking of the filter frame 3, avoiding problems such as deviation or jamming of the shaking direction. The setting of the compression spring 8 plays a role in resetting. During the shaking process of the filter frame 3, the compression springs 8 on both sides of the support block 2 can absorb and release energy. In a stable situation, the support block 2 is in the middle position of the chute 301. The above - mentioned structural form can increase the horizontal shaking frequency of the filter frame 3, thereby improving the sewage discharge effect.

[0035] As Figure 6As shown, in some examples, the shaking is driven by the interaction between the force-bearing portion 302 of the outer wall of the filter frame 3 and the elastic stop block 9 at the corresponding position on the filter frame 1. Compared with the magnetic strip that is difficult to produce, it has fewer components, the mechanical connection relationship is simple, and the components can cooperate more smoothly to achieve the purpose.

[0036] Specifically, the force-bearing portion 302 can be a block-shaped protrusion, and the edges can be rounded to prevent scratches and damage to the elastic stopper 9 during the contact process, and the stopper 9 can be evenly distributed on the outer wall of each filter frame 3, avoiding the center position of the support block 2, to avoid interference with the top or bottom support block 2. The elastic stopper 9 can be the same as the force-bearing portion 302 in form, but the material is different. The elastic stopper 9 needs to have a certain elastic deformation ability to push the filter frame 3 to shake, while the force-bearing portion 302 does not need to have elastic deformation ability. In addition, the elastic stopper 9 can be horizontally welded or detachable, and there are several of them on the filter frame 1 corresponding to one side of the force-bearing portion 302, so that all the filter frames 3 can be affected by the elastic stopper 9, and the filter frame 3 that is farther away from the end of the filter frame 1 is affected more times by the elastic stopper 9, because the displacement of the filter frame 3 that is farther away from the end of the filter frame 1 is greater.

[0037] Shaking process: When the filter frame 3 follows the support block 2 to slide in the horizontal direction, the force-bearing part 302 of the outer wall of the filter frame 3 gradually approaches and squeezes the elastic stopper 9 until it is separated. The force-bearing part 302 will be subjected to the force of the compression spring 8 located in the slide groove 301 which is deformed in the above process to complete the horizontal shaking and achieve the purpose of cleaning solid impurities (filter cake).

[0038] like Figure 6 , Figure 9 As shown, in some examples, the clamping grooves 601 are arranged on adjacent sides of two pressing plates 6. When the pressing plates 6 press a number of filter frames 3 between the grooves, the filter frames 3 and the clamping grooves 601 can fit tightly. This fitting method is like a customized mold, so that the filter frames 3 can be evenly and tightly fixed on all sides when under pressure, effectively preventing the leakage of polyether polyols during the filtration process, ensuring the sealing of the filtration space, and ensuring the quality of the polyether polyol products.

[0039] In addition, accurate positioning is provided for the filter frame 3, so that each filter frame 3 is located at an accurate position in the filter space.

[0040] like Figures 6 to 13As shown, in some examples, several elastic stoppers 9 are arranged horizontally and are corresponding to the filter rack 1 on one side of the force-receiving part 302. On the premise that all the filter frames 3 can be affected by the elastic stoppers 9, further consideration is given. To avoid the displacement of the filter frames 3 farther away from the end of the filter rack 1 being larger, resulting in different numbers of times of interaction between each filter frame 3 and the elastic stopper 9, that is, the filter frames 3 farther away from the end of the filter rack 1 have more interaction times, and the filter frames 3 closer to the end of the filter rack 1 have fewer interaction times, the locking bolts 10 of the support blocks 2 used to lock the ends at both ends of the filter rack 1 are used to solve the above problems.

[0041] Specifically, a certain displacement of all the filter frames 3 can be ensured, that is, they interact with the elastic stopper 9 at different positions. The whole process ( Figure 1 → Figure 2 → Figure 13 ) is as follows: Before filtration, first lock the support block 2 at the left end through the locking bolt 10 at the left end. At this time, the support block 2 at the left end is placed in the pressing groove 601 of the left end pressing plate 6. Then the pressing plate 6 at the right end moves closer to the left end and presses the remaining filter frames 3 until the filter frames 3 are in close contact with each other to form a filtration space with the pressing plate 6, and crude polyether polyol is introduced to complete the filtration; subsequently, the pressing plate 6 at the right end moves away from the left end to release the filter frames 3. Each filter frame 3 interacts with the elastic stopper 9 during this process to remove solid impurities (filter cakes); the pressing plate 6 at the right end moves to the end of the filter rack 1, the locking bolt 10 at the left end is released, and at the same time the locking bolt 10 at the right end is locked to the support block 2 at the right end, and then repeat the above operation (the pressing plate 6 at the left end presses, the pressing plate 6 at the left end releases, and solid impurities (filter cakes) are removed).

[0042] In addition, as Figure 7 shown, it is not necessary for the elastic stoppers 9 to be completely evenly distributed in the filter rack 1 to cover all the filter frames 3. They can be arranged at the middle position of the filter rack 1, which can also ensure the displacement of all the filter frames 3, and the displacement of each filter frame 3 is more uniform.

[0043] As Figures 11 to 12 shown, in some examples, the elastic member 5 is sleeved on the guide rod 11, which provides stable guidance for its expansion and contraction, prevents the elastic member 5 from being twisted or displaced when stressed, improves the stability of the movement process of the filter frame 3, and the elastic members 5 on adjacent two support blocks 2 are arranged in a staggered manner. This layout method maximizes the function of the elastic member 5 in a limited space, avoids the space congestion caused by the concentrated setting of the elastic member 5, and the overall structure is more compact.

[0044] As Figures 11 to 12As shown, in some examples, the limit post 12 can limit the minimum distance between adjacent support blocks 2, preventing the adjacent support blocks 2 from being too close to each other, which may affect the shaking effect or the formation of the filtering space. The threaded setting of the limit post 12 also facilitates adjustment by workers, thereby accurately controlling the distance between adjacent support blocks 2 and improving the efficiency of equipment debugging.

[0045] Moreover, the limit post 12 and the guide rod 11 are symmetrically arranged on the support block 2, respectively corresponding to the top and bottom of the support block 2 one by one, which also prevents the two components arranged on the support block 2 from being too compact, making it inconvenient for workers to debug, and optimizing the space setting.

[0046] As Figure 6 shown, in some examples, the support block 2 is set as a frame shape, and the guide part 13 of the filter rack 1 penetrates through it. This structure provides precise guidance for the sliding of the support block 2, preventing the support block 2 from shifting or shaking during the sliding process.

[0047] Moreover, the frame-shaped support block 2 provides a stable foundation for the installation of the filter box 3, which can be easily shaken and connected to the support block 2. And due to the stability of the support block 2, the filter box 3 is easier to position and adjust during the installation process.

[0048] As Figure 6 shown, in some examples, a recycling box 14 is arranged at the bottom of the filter rack 1, which can accurately receive the solid impurities (filter cakes) falling off from the filter cloth 4, realizing the centralized collection of solid impurities (filter cakes), preventing the residues from scattering into the production environment around the filter, reducing the workload of subsequent cleaning, and also facilitating the continuity of production for subsequent centralized treatment of the solid impurities (filter cakes).

[0049] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present disclosure and are not restrictive. Although the present disclosure has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present disclosure can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present disclosure, and they should all be covered by the scope of the claims of the present disclosure.

Claims

1. A plate filter for chemical production, characterized in that: include: Filter holder (1); A plurality of support blocks (2), wherein the plurality of support blocks (2) are slidably disposed on the filter frame (1) and are arranged in sequence along the sliding direction of the support blocks (2); each support block (2) is movably connected to a filter frame (3); each filter frame (3) is provided with a filter cloth (4); the filter frame (3) is configured to cause solid residues on the filter cloth (4) to fall off after shaking; an elastic member (5) is provided between two adjacent support blocks (2); the elastic member (5) elastically pushes the support block (2) so that the two adjacent support blocks (2) are moved away from each other; Two pressing plates (6), the two pressing plates (6) are both arranged on the filter frame (1) and slide relative to each other, the plurality of support blocks (2) are both located between the two pressing plates (6), and the pressing plates (6) are used to press the plurality of filter frames (3) to form a filter space; The pressing plate (6) is configured to release the filter frame (3) after sliding, so that every two adjacent filter frames (3) move away from each other synchronously.

2. A plate filter for chemical production according to claim 1, characterized in that: The sliding direction of the support block (2) is horizontal, the shaking direction of the filter frame (3) is parallel to the sliding direction of the support block (2), the outer wall of the filter frame (3) is provided with a slide groove (301), and one end of the support block (2) is slidably arranged in the slide groove (301).

3. A plate filter for chemical production according to claim 2, characterized in that: A guide column (7) is horizontally arranged on the inner edge of the slide groove (301), and the guide column (7) passes through the support block (2). Compression springs (8) are sleeved on both ends of the guide column (7), and one end of the compression spring (8) is connected to the support block (2), and the other end is connected to the filter frame (3).

4. A plate filter for chemical production according to any one of claims 1 to 3, characterized in that: A force-bearing portion (302) is provided on the outer wall of each filter frame (3), an elastic stopper (9) is provided on the filter frame (1), and the elastic stopper (9) is located on one side of the force-bearing portion (302). The filter frame (3) is configured to slide along with the support block (2) and then pass through the elastic stopper (9), so that the filter frame (3) shakes on the support block (2).

5. A plate filter for chemical production according to claim 1, characterized in that: The two pressing plates (6) are both slidably arranged on the filter frame (1) and both have a pressing groove (601), wherein the pressing groove (601) is located on adjacent sides of the two pressing plates (6), and the pressing plates (6) are used to press a plurality of the filter frames (3) between the two pressing grooves (601) to form the filter space.

6. A plate filter for chemical production according to claim 5, characterized in that: Both ends of the filter frame (1) are provided with locking bolts (10) for locking the support block (2) so as to change the sliding range of the support block (2), and a plurality of the support blocks (2) are located between two of the locking bolts (10).

7. A plate filter for chemical production according to claim 1, characterized in that: A guide rod (11) is also provided through each of the support blocks (2), the elastic member (5) is sleeved on the guide rod (11), two ends of the elastic member (5) are respectively connected to two adjacent support blocks (2) in a one-to-one correspondence, and the two adjacent elastic members (5) are staggered.

8. A plate filter for chemical production according to claim 7, characterized in that: A limiting column (12) is also threadedly provided on each of the support blocks (2), and the limiting column (12) and the guide rod (11) are symmetrically arranged. The support block (2) is configured to abut against the limiting column (12) on an adjacent support block (2) after sliding, so as to limit the minimum distance between two adjacent support blocks (2).

9. A plate filter for chemical production according to claim 1, characterized in that: The support block (2) is frame-shaped, and the filter frame (1) has a guide portion (13), wherein the guide portion (13) passes through the support block (2).

10. A plate filter for chemical production according to claim 1, characterized in that: A recovery box (14) is provided at the bottom of the filter frame (1); the recovery box (14) is located directly below the plurality of filter frames (3) and is used to receive solid residues.

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