An exhaust gas treatment gypsum pressure filtration system

Abstract

The present invention relates to the technical field of gypsum pressure filtration. The present invention discloses a tail gas treatment gypsum pressure filtration system, which includes a collection bin. A number of the dual-purpose filtration and pressing discs respectively form a first execution disc group and a second execution disc group. The first execution disc group and the second execution disc group perform alternating expansion and compression movements along with the movement of the driving execution disc. A liquid extraction pipeline for sucking the filtrate inside the dual-purpose filtration and pressing disc and a vacuum suction pipeline communicated with an external vacuum pumping device to form a negative pressure inside the dual-purpose filtration and pressing disc are arranged on the side of the dual-purpose filtration and pressing disc. This system mainly adopts a cooperative method of alternating suction and pressure filtration to form continuous gypsum pressure filtration, realizes single-drive pressure filtration and pre-concentrates the subsequent pressure filtration liquid in advance to meet the pressure filtration requirements, synchronizes pressure filtration and suction to achieve the purpose of cyclic suction and pressure filtration, realizes continuous pressure filtration, and solves the problem of filter surface contact during closed gypsum separation and collection on the basis of continuity.

Description

Technical Field

[0001] The present invention relates to the technical field of gypsum pressure filtration, and specifically to a tail gas treatment gypsum pressure filtration system. Background Technique

[0002] When treating flue gas, a desulfurization and denitrification liquid is sprayed in the spray layer to produce gypsum-like products, which are mainly in the form of gypsum slurry. In order to reuse this liquid, it is necessary to concentrate and briquette the gypsum slurry, and at the same time, the concentrated liquid is recycled;

[0003] Currently, it is mainly collected in two ways. The plate filter mainly arranges multiple filter plates in one direction. The liquid flows into the filter plates, and by squeezing the filter plates, the moisture inside the slurry quickly drains away until gypsum blocks are formed between the filter plates for collection. The problem with this collection method is that when loading and unloading gypsum, the gypsum easily adheres to the filter plates. When the two filter plates need to be closed, and the disassembly of gypsum from multiple filter plates is mainly manual, so the gypsum adhering to the filter plates is likely to not fall off. However, during backwashing, gas passes through the filter plates and flows to the outside, and at this time, small particles of gypsum on the filter plates are likely to fly and affect the environment. At the same time, the pressure filtration method of the filter plates often needs to be used in conjunction with a hydrocyclone. Because in the case of too dilute liquid, the extrusion method of the filter plates results in too small a volume of the finished gypsum after pressure filtration. Although currently, the form of backwashing can be used to make the gypsum detach, the vacuum belt filter is more suitable for continuous gypsum slurry treatment in flue gas treatment and can concentrate without using a hydrocyclone. Its principle is mainly that the conveyor belt is converted into a filter belt. When the filter belt moves, through vacuum suction, the liquid is first separated, so that the slurry on the surface of the conveyor belt is concentrated. In order to increase the vacuum suction effect, the conveying stroke of the conveyor belt will be increased to make the liquid discharge volume match the conveying speed of the filter belt, and at the same time, the effect of the slurry during vacuum suction can meet the standard. Finally, a gypsum cake is produced on the filter belt through extrusion, and as the filter belt rotates to the end, it is conveyed to the storage tank. This method can be well applied to gypsum treatment, but the drawback of this method is that the increase in the movement stroke leads to a large increase in the volume of the entire equipment, seriously occupying space, and its applicability is affected by space. Summary of the Invention

[0004] The purpose of the present invention is to provide a tail gas treatment gypsum pressure filtration system to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the present invention provides the following technical solutions:

[0006] An exhaust gas treatment gypsum pressure filtration system includes a collection bin. A plurality of filter and pressure dual-purpose disks are slidably connected to the top of the collection bin. The plurality of filter and pressure dual-purpose disks respectively form a first execution disk group and a second execution disk group. The filter and pressure dual-purpose disk located in the middle is a driving execution disk. The driving execution disk is driven by a driving push rod to translate on the top of the collection bin. The first execution disk group and the second execution disk group perform alternating expansion and compression movements following the movement of the driving execution disk;

[0007] The top of the collection bin is an open structure. A middle fixed arc plate is fixedly connected to the middle of the open end of the collection bin. Arc-shaped closing plates are respectively slidably connected to both ends of the middle fixed arc plate. The length of the arc-shaped closing plate is greater than the compression limit length of the first execution disk group and the second execution disk group, and the length of the arc-shaped closing plate is less than the expansion limit length of the first execution disk group and the second execution disk group. The lengths of the two arc-shaped closing plates are equal;

[0008] Filter cloth surfaces are arranged on both sides of the bottom surface of the filter and pressure dual-purpose disk. The interior of the filter and pressure dual-purpose disk is a hollow structure. A liquid extraction pipeline for sucking the filtrate inside the filter and pressure dual-purpose disk and a vacuum suction pipeline communicated with an external vacuum pumping device are arranged on the side surface of the filter and pressure dual-purpose disk to form a negative pressure inside the filter and pressure dual-purpose disk;

[0009] The space between two adjacent filter and pressure dual-purpose disks is closed by a disk connection telescopic plate. The disk connection telescopic plate includes a central plate and side connection storage plates fixedly connected to the side surface of the filter and pressure dual-purpose disk. The central plate is slidably connected between two opposite side connection storage plates. A gypsum delivery pipeline is arranged on the top of the central plate. The gypsum delivery pipeline is communicated with an external gypsum liquid supply system. The disk connection telescopic plate, the filter and pressure dual-purpose disk, the arc-shaped closing plate and the middle fixed arc plate cooperate to form a sealed pressure filtration environment.

[0010] As a further scheme of the present invention: Connection sleeves are arranged on both sides of the filter and pressure dual-purpose disk. Two guide rods are arranged on the collection bin. The connection sleeve is slidably connected to the guide rod. One of the guide rods is fixedly connected to the collection bin, and the other guide rod is slidably connected through an extension chute. The connection sleeve on one side of the filter and pressure dual-purpose disk is fixedly connected to the filter and pressure dual-purpose disk. A sleeve adjustment chute is arranged on the other side of the filter and pressure dual-purpose disk. The connection sleeve on the other side of the filter and pressure dual-purpose disk is slidably connected to the sleeve adjustment chute. The end of the collection bin is fixedly connected to the sliding guide rod through a connection bracket. The connection bracket is rotatably connected to the collection bin.

[0011] As a further solution of the present invention: a fitting chute is provided on the top of the arc-shaped closing plate near one side of the sliding guide rod, the connecting sleeve slides inside the sleeve adjusting chute through a slider, an electromagnetic block is arranged at the bottom of the sliding connecting sleeve, telescopic blocks are magnetically connected to both sides of the electromagnetic block, the telescopic blocks are slidably connected with the fitting chute in a matching manner, and a groove body with the same shape and specifications as the fitting chute is provided on the top of the middle fixed arc plate.

[0012] As a further solution of the present invention: a U-shaped gypsum separation elastic sheet is arranged between two adjacent filter and pressure dual-purpose discs. When the U-shaped gypsum separation elastic sheet is static, the side wall of the U-shaped gypsum separation elastic sheet fits with the filter cloth surface, the top surface of the U-shaped gypsum separation elastic sheet fits with the bottom surface of the side connecting and receiving plate, and the width of the central plate is greater than the diameter of the gypsum conveying pipeline.

[0013] As a further solution of the present invention: the pipeline of the liquid extraction pipeline extending to the inner wall of the filter and pressure dual-purpose disc extends along the shape of the inner wall of the filter and pressure dual-purpose disc to the bottom end of the filter and pressure dual-purpose disc, and the vacuum suction pipeline is located above the liquid extraction pipeline.

[0014] As a further solution of the present invention: when the filter and pressure dual-purpose disc is at the compression limit, the central plate is completely received inside the side connecting and receiving plate, the conveying pipe orifice where the bottom surface of the central plate communicates with the gypsum conveying pipeline is closed inside the side connecting and receiving plate, and a pipeline fitting arc-shaped groove matching with the gypsum conveying pipeline is provided on the top of the side connecting and receiving plate.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] This system mainly adopts an alternating suction and pressure filtration cooperation method to form continuous gypsum pressure filtration, realizes single-drive pressure filtration while pre-concentrating the subsequent pressure filtration liquid in advance to meet the pressure filtration requirements, synchronizes pressure filtration and suction to form a cycle of suction and pressure filtration, achieves the pressure filtration effect while reducing the volume without using a hydrocyclone, and the reasonable matching improves the efficiency. At the same time, continuous pressure filtration is realized, and on the basis of continuity, the problem of filter surface contact during closed gypsum separation and collection is solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0018] Figure 1It is a three-dimensional schematic diagram of a tail gas treatment gypsum pressure filtration system;

[0019] Figure 2 It is a schematic diagram of compression and expansion of a tail gas treatment gypsum pressure filtration system;

[0020] Figure 3 It is a schematic diagram of discharging of a tail gas treatment gypsum pressure filtration system;

[0021] Figure 4 It is a three-dimensional schematic diagram of a filter and pressure dual-purpose disc and an arc-shaped closing plate in a tail gas treatment gypsum pressure filtration system;

[0022] Figure 5 It is a three-dimensional schematic diagram of a filter and pressure dual-purpose disc and a telescopic plate connecting the disc body in a tail gas treatment gypsum pressure filtration system;

[0023] Figure 6 It is a front view schematic diagram of a U-shaped gypsum separation elastic piece in a tail gas treatment gypsum pressure filtration system;

[0024] Figure 7 It is a sectional schematic diagram of a filter and pressure dual-purpose disc in a tail gas treatment gypsum pressure filtration system;

[0025] In the figure: 1. Collection bin; 11. Connection bracket; 12. Extension chute; 13. Guide rod; 14. Arc-shaped closing plate; 141. Matching chute; 15. Middle fixed arc plate; 2. Filter and pressure dual-purpose disc; 2a. First execution disc group; 2b. Second execution disc group; 2c. Driving execution disc; 21. Liquid extraction pipeline; 22. Vacuum suction pipeline; 23. Connection sleeve; 231. Slide block; 232. Electromagnetic block; 233. Telescopic block; 24. Sleeve adjustment chute; 25. Filter cloth surface; 3. Disc body connecting telescopic plate; 31. Central plate; 32. Side connection storage plate; 321. Pipeline matching arc groove; 33. Gypsum conveying pipeline; 331. Conveying pipe orifice; 4. Driving push rod; 5. U-shaped gypsum separation elastic piece. Specific implementation mode

[0026] Please refer to Figures 1 - 7 :

[0027] It includes a collection bin 1, and a plurality of filter and pressure dual-purpose discs 2 are slidably connected to the top of the collection bin 1. The plurality of filter and pressure dual-purpose discs 2 respectively form a first execution disc group 2a and a second execution disc group 2b. The filter and pressure dual-purpose disc 2 located in the middle is a driving execution disc 2c. The driving execution disc 2c is driven by a driving push rod 4 to translate on the top of the collection bin 1, and the first execution disc group 2a and the second execution disc group 2b perform alternating expansion and compression movements along with the movement of the driving execution disc 2c;

[0028] Firstly, the collection bin 1 mainly provides a storage space for the filter and pressure dual-purpose plate 2. The lower part of the filter and pressure dual-purpose plate 2 cooperates with the collection bin 1 to form a pressure filtration closed space. Firstly, this system mainly adopts the cooperation mode of alternating suction and pressure filtration to form continuous gypsum pressure filtration, realizing single-drive pressure filtration and pre-concentrating the subsequent pressure filtration liquid in advance to meet the pressure filtration requirements. The pressure filtration and suction are carried out synchronously to form the purpose of cyclic suction and pressure filtration. Without using a hydrocyclone, while achieving the pressure filtration effect, the volume is reduced, and the reasonable matching also improves the efficiency, and at the same time realizes continuous pressure filtration;

[0029] Firstly, the filter and pressure dual-purpose plate 2 is divided into a first execution plate group 2a and a second execution plate group 2b. A driving execution plate 2c is arranged in the middle of the first execution plate group 2a and the second execution plate group 2b. The driving execution plate 2c cooperates with the driving push rod 4, and the driving push rod 4 is used to push the driving execution plate 2c to linearly slide on the collection bin 1. When the driving execution plate 2c slides, the first execution plate group 2a located at the sliding direction position of the driving execution plate 2c is in the pressure filtration stage, while the second execution plate group 2b is in the expansion stage. Therefore, the first execution plate group 2a does not inject gypsum slurry at this time, while the second execution plate group 2b injects gypsum slurry during the pressure filtration process of the first execution plate group 2a. The residual liquid inside the second execution plate group 2b is concentrated by using the injection pressure and vacuum suction through the filter and pressure dual-purpose plate 2, so that after the first execution plate group 2a finishes pressure filtration, the concentrated slurry in the second execution plate group 2b meets the pressure filtration requirements, and the volume of the finally produced gypsum pressure filtration product meets the requirements, so as to achieve the purpose of continuous operation while reducing the equipment volume and reducing the use of hydrocyclones;

[0030] The top of the collection bin 1 is an open structure. The middle part of the open end of the collection bin 1 is fixedly connected with a middle fixed arc plate 15. Both ends of the middle fixed arc plate 15 are respectively slidably connected with arc-shaped closing plates 14. The length of the arc-shaped closing plates 14 is greater than the compression limit length of the first execution plate group 2a and the second execution plate group 2b, and the length of the arc-shaped closing plates 14 is less than the expansion limit length of the first execution plate group 2a and the second execution plate group 2b. The lengths of the two arc-shaped closing plates 14 are equal;

[0031] First, the collection bin 1 is connected to the filter and pressure dual-purpose disc 2. However, if the filter and pressure dual-purpose disc 2 wants to achieve vacuum suction, a sealed environment is required at this time. Therefore, the middle fixed arc plate 15 and the arc-shaped closing plate 14 are provided. The length of the arc-shaped closing plate 14 is greater than the compression limit length of the first execution disc group 2a and the second execution disc group 2b, and the length of the arc-shaped closing plate 14 is less than the expansion limit length of the first execution disc group 2a and the second execution disc group 2b. The lengths of the two arc-shaped closing plates 14 are equal. The main purpose is that when the expansion distance of the compressed first execution disc group 2a or the compressed second execution disc group 2b is equal to the length of the arc-shaped closing plate 14, this stage is the unloading and expansion stage after pressure filtration contact. And in this stage, the first execution disc group 2a or the second execution disc group 2b in the corresponding expansion stage is in the expansion and contraction period. At this time, liquid is continuously injected. With the reduction of the space and the increase of the liquid injection pressure, it plays a positive role in the vacuum suction effect. And in this stage, when the compressed first execution disc group 2a or the compressed second execution disc group 2b is in the unloading and expansion stage, the arc-shaped closing plate 14 is rotated and opened at this time, so that the compressed material can fall into the interior of the collection bin 1. At this time, the arc-shaped closing plate 14 is closed again. After this stage is completed, after the arc-shaped closing plate 14 is closed, the first execution disc group 2a or the second execution disc group 2b after unloading starts to inject liquid, while the opposite first execution disc group 2a or the second execution disc group 2b stops injecting liquid and starts to enter the pressure filtration stage, thus realizing continuous processing;

[0032] Filter cloth surfaces 25 are provided on both sides of the bottom surface of the filter and pressure dual-purpose disc 2. The interior of the filter and pressure dual-purpose disc 2 is a hollow structure. A liquid extraction pipeline 21 for sucking the filtrate inside the filter and pressure dual-purpose disc 2 and a vacuum suction pipeline 22 communicating with an external vacuum pumping device to form a negative pressure inside the filter and pressure dual-purpose disc 2 are provided on the side surface of the filter and pressure dual-purpose disc 2;

[0033] The filter cloth surface 25 mainly forms a filtering surface, enabling the liquid to pass through the filter cloth surface 25 and enter the interior of the pressure and suction dual-purpose disc 2. At this time, the liquid first accumulates below the pressure and suction dual-purpose disc 2. Therefore, the liquid in the interior of the pressure and suction dual-purpose disc 2 is pumped out by the liquid extraction pipeline 21. This method can be adjusted according to requirements. In the initial stage, when the liquid volume is very high, the valve at the front end of the liquid extraction pipeline 21 is opened, and the liquid in the interior of the pressure and suction dual-purpose disc 2 is continuously sucked. Due to the excessive liquid volume, at this time, the vacuum suction pipeline 22 is used for vacuum suction, so that a negative pressure is formed in the interior of the pressure and suction dual-purpose disc 2, and the liquid continuously enters the interior of the pressure and suction dual-purpose disc 2 through the filter cloth surface 25. In the subsequent pressure filtration stage, when the liquid volume is too small, the liquid extraction pipeline 21 can be intermittently opened. During the closed stage of the liquid extraction pipeline 21, through vacuum suction and squeezing to filter water, the liquid enters the interior of the pressure and suction dual-purpose disc 2 to cover the port of the liquid extraction pipeline 21, and then the liquid extraction pipeline 21 is opened for pumping and discharging. Repeating this process can effectively improve the pressure filtration effect. Since the control method can be completely realized by the controller, and the alternate opening control is an existing technology, the control principle will not be elaborated here.

[0034] The space between two adjacent pressure and suction dual-purpose discs 2 is closed by the disc body connecting telescopic plate 3. The disc body connecting telescopic plate 3 includes a central plate 31 and side connecting storage plates 32 fixedly connected to the side surface of the pressure and suction dual-purpose disc 2. The central plate 31 is slidably connected between two opposite side connecting storage plates 32. A gypsum conveying pipeline 33 is arranged at the top of the central plate 31, and the gypsum conveying pipeline 33 is communicated with an external gypsum liquid supply system. The disc body connecting telescopic plate 3, the pressure and suction dual-purpose disc 2, the arc-shaped closing plate 14, and the middle fixed arc plate 15 cooperate to form a sealed pressure filtration environment;

[0035] First of all, the arc-shaped closing plate 14 and the middle fixed arc plate 15 can close the bottom of the pressure and suction dual-purpose disc 2, but there is no closing structure at the top of the pressure and suction dual-purpose disc 2. Therefore, the disc body connecting telescopic plate 3 is provided. The structure of the disc body connecting telescopic plate 3 is relatively special. The central plate 31 is located in the middle, and the side connecting storage plates 32 are located on the sides. The main purpose is that when extending, it can be extended and closed through the expansion of the side connecting storage plates 32 and the central plate 31. At the same time, the side surface of the disc body connecting telescopic plate 3 needs to contact the inner wall of the arc-shaped closing plate 14, and the contact surface is attached with rubber to achieve sealing, so that the disc body connecting telescopic plate 3, the arc-shaped closing plate 14 or the middle fixed arc plate 15, and the filter cloth surface 25 form a closed cavity. When the pressure and suction dual-purpose disc 2 is evacuated, the liquid can pass through the filter cloth surface 25 and enter the interior of the pressure and suction dual-purpose disc 2. At the same time, the central plate 31 needs to cooperate with the external gypsum conveying pipeline 33 to achieve liquid injection. During pressure filtration, the two opposite side connecting storage plates 32 will completely close the central plate 31, thereby closing the pipe orifice of the conveying pipe orifice 331.

[0036] On both sides of the dual-purpose filtering and pressing disc 2, connecting sleeves 23 are provided. On the collection bin 1, two guide rods 13 are provided. The connecting sleeve 23 is slidably connected to the guide rod 13. One of the guide rods 13 is fixedly connected to the collection bin 1, and the other guide rod 13 is slidably connected through an extension chute 12. The connecting sleeve 23 on one side of the dual-purpose filtering and pressing disc 2 is fixedly connected to the dual-purpose filtering and pressing disc 2. On the other side of the dual-purpose filtering and pressing disc 2, a sleeve adjustment chute 24 is provided. The connecting sleeve 23 on the other side of the dual-purpose filtering and pressing disc 2 is slidably connected to the sleeve adjustment chute 24. The end of the collection bin 1 is fixedly connected to the sliding guide rod 13 through a connecting bracket 11, and the connecting bracket 11 is rotatably connected to the collection bin 1;

[0037] First, the movement of the arc-shaped closing plate 14 is described above, and the arc-shaped closing plate 14 needs to be rotated upward. Therefore, the structure is explained here. First, the side of the dual-purpose filtering and pressing disc 2 is slidably limited through the cooperation of the connecting sleeve 23 and the guide rod 13, and the sliding limit can increase the sliding stability of the dual-purpose filtering and pressing disc 2. And the arc-shaped closing plate 14 needs to rotate to one side. Therefore, one of the connecting sleeves 23 is slidably connected to the dual-purpose filtering and pressing disc 2, and the sleeve adjustment chute 24 provides a sliding track for the connecting sleeve 23. At this time, when the arc-shaped closing plate 14 rotates and opens, one of the guide rods 13 cooperates with the connecting sleeve 23 to make the connecting sleeve 23 slide in the sleeve adjustment chute 24. At the same time, the arc-shaped closing plate 14 is driven by the connecting sleeve 23 to rotate outward, so as to rotate out the arc-shaped closing plate 14. After the arc-shaped closing plate 14 rotates out, the bottom of the first execution disc group 2a or the second execution disc group 2b is open, and the material drops;

[0038] On one side of the top of the arc-shaped closing plate 14 close to the sliding guide rod 13, a mating chute 141 is provided. The connecting sleeve 23 slides inside the sleeve adjustment chute 24 through a slider 231. At the bottom of the sliding connecting sleeve 23, an electromagnet 232 is provided. On both sides of the electromagnet 232, telescopic blocks 233 are magnetically connected. The telescopic blocks 233 are slidably connected to the mating chute 141. On the top of the middle fixed arc plate 15, a groove body with the same shape and specifications as the mating chute 141 is provided;

[0039] First, since the guide rod 13 is an independent pipe, when the guide rod 13 is opened, it is easy to open the arc-shaped closing plate 14 at the bottom of the first actuator disc group 2a and the second actuator disc group 2b in other stages. Therefore, the electromagnet block 232 and the matching chute 141 are provided. First, under normal circumstances, the electromagnet block 232 has no magnetism. The telescopic block 233 is received in the side hole of the electromagnet block 232. Through the spring, the telescopic block 233 is located in the chute body of the matching chute 141. The connecting sleeve 23 cannot be separated from the matching chute 141 and can only slide within the matching chute 141. During disassembly, the electromagnet block 232 above the arc-shaped closing plate 14 that does not need to be opened at this time is energized, and the telescopic block 233 can be contracted by magnetic adsorption. At this time, after the arc-shaped closing plate 14 rotates and opens, the telescopic block 233 inside the matching chute 141 at the top of the arc-shaped closing plate 14 that does not need to be opened at this time is received into the electromagnet block 232, and the connecting sleeve 23 is separated from the arc-shaped closing plate 14. A connecting bracket 11 is provided on the side of the collection bin 1, and the arc-shaped closing plate 14 can be opened by directly driving the connecting bracket 11 to rotate by a motor;

[0040] A U-shaped gypsum separation elastic sheet 5 is provided between two adjacent filter and pressure dual-purpose discs 2. When the U-shaped gypsum separation elastic sheet 5 is static, the side wall of the U-shaped gypsum separation elastic sheet 5 is attached to the filter cloth surface 25, and the top surface of the U-shaped gypsum separation elastic sheet 5 is attached to the bottom surface of the side connection and storage plate 32. The width of the central plate 31 is greater than the diameter of the gypsum delivery pipeline 33;

[0041] First, in a closed environment, the adhesion of gypsum to the filter cloth surface 25 needs to be solved. Therefore, the U-shaped gypsum separation elastic sheet 5 is provided. When the U-shaped gypsum separation elastic sheet 5 is static, it is in a U shape and is attached to the filter cloth surface 25 and the bottom surface of the side connection and storage plate 32. At this time, part of the gypsum will be located on the surface of the U-shaped gypsum separation elastic sheet 5. A coating that is not easily adhered to by gypsum can be sprayed or adhered to the surface of the U-shaped gypsum separation elastic sheet 5. During separation, after the filter and pressure dual-purpose disc 2 is opened, the distance between two adjacent filter cloth surfaces 25 changes, and the bottom width of the U-shaped gypsum separation elastic sheet 5 changes, causing the U-shaped gypsum separation elastic sheet 5 to undergo elastic deformation. An included angle is formed between the side surface of the U-shaped gypsum separation elastic sheet 5 and the filter cloth surface 25, so as to separate the gypsum from the side of the filter cloth surface 25. At the same time, the top height of the U-shaped gypsum separation elastic sheet 5 decreases, so that the top of the gypsum will not adhere either, thus avoiding the situation where the gypsum adheres to the filter cloth surface 25 and is difficult to separate, and getting rid of manual separation;

[0042] The pipeline of the liquid extraction pipeline 21 extending to the inner wall of the filter and pressure dual-purpose disc 2 extends along the shape of the inner wall of the filter and pressure dual-purpose disc 2 to the bottom end of the filter and pressure dual-purpose disc 2. The vacuum suction pipeline 22 is located above the liquid extraction pipeline 21;

[0043] The vacuum suction pipeline 22 is located above the liquid extraction pipeline 21 and is less likely to adsorb liquid. The liquid extraction pipeline 21 extends to the bottom of the dual-purpose filter and pressure plate 2, which can effectively drain the liquid.

[0044] When the dual-purpose filter and pressure plate 2 is at the compression limit, the central plate 31 is completely received inside the side connection receiving plate 32. The delivery pipe orifice 331, which communicates the bottom surface of the central plate 31 with the gypsum delivery pipeline 33, is enclosed inside the side connection receiving plate 32. The top of the side connection receiving plate 32 is provided with a pipeline matching arc-shaped groove 321 that matches the gypsum delivery pipeline 33.

[0045] Since when the side connection receiving plates 32 are closed, the side connection receiving plates 32 come into contact with each other, causing the central plate 31 to be received inside the side connection receiving plate 32. Due to the setting of the gypsum delivery pipeline 33, the side connection receiving plate 32 is prone to interference from the gypsum delivery pipeline 33 after being received. Therefore, the pipeline matching arc-shaped groove 321 is used to cooperate with the gypsum delivery pipeline 33 to avoid the gypsum delivery pipeline 33 from being kinked or folded. The bottom of the side connection receiving plate 32 closes the delivery pipe orifice 331. An elastic telescopic area can be provided on the relative contact surface of the two side connection receiving plates 32. After the side connection receiving plate 32 closes the delivery pipe orifice 331, partial displacement and compression can still occur between the adjacent two side connection receiving plates 32, so that there is no delivery pipe orifice 331 during the final compression process, thereby further improving the compression effect.

[0046] Usage process:

[0047] During the initial use, the first execution disc group 2a and the second execution disc group 2b inject slurry synchronously. The liquid enters the enclosed space between the two adjacent dual-purpose filter and pressure plates 2 below the disc body connection telescopic plate 3 through the gypsum delivery pipeline 33. At this time, the liquid is overly diluted. The liquid extraction pipeline 21 and the vacuum suction pipeline 22 are opened synchronously to quickly concentrate the slurry in the enclosed space of the first execution disc group 2a and the second execution disc group 2b, and the liquid is discharged through the liquid extraction pipeline 21.

[0048] First, the driving push rod 4 is used to push the driving execution disc 2c towards the first execution disc group 2a. At this time, the first execution disc group 2a starts to compress, and the second execution disc group 2b starts to expand. When the first execution disc group 2a is compressed to a certain amount, the disc body connection telescopic plate 3 stops injecting until the first execution disc group 2a is compressed to the limit. At this time, the second execution disc group 2b continues to inject slurry and continues to suction and concentrate.

[0049] The driving push rod 4 drives the driving execution disc 2c to move towards the second execution disc group 2b. At this time, the first execution disc group 2a starts to expand, and the distance between two adjacent filter and pressure dual-purpose discs 2 at the first execution disc group 2a increases. The U-shaped gypsum separation elastic piece 5 deforms, peeling the gypsum from the filter cloth surface 25. When the distance of the first execution disc group 2a reaches the length of the arc-shaped closing plate 14, the arc-shaped closing plate 14 below the first execution disc group 2a is driven to open, and the material falls into the connecting bracket 11. Then, the arc-shaped closing plate 14 is driven to reset. At this time, the first execution disc group 2a injects slurry, and the second execution disc group 2b continues to concentrate until the final pressure filtration ends, and this process is repeated.

[0050] The above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present invention.

Claims

1. A tail gas treatment gypsum pressure filtration system, comprising a collection bin (1), characterized in that: A plurality of filter and pressure dual-purpose discs (2) are slidably connected to the top of the collection bin (1). The plurality of filter and pressure dual-purpose discs (2) respectively form a first execution disc group (2a) and a second execution disc group (2b). The filter and pressure dual-purpose disc (2) located in the middle is a driving execution disc (2c). The driving execution disc (2c) is driven by a driving push rod (4) to translate on the top of the collection bin (1). The first execution disc group (2a) and the second execution disc group (2b) perform alternating expansion and compression movements along with the movement of the driving execution disc (2c). The top of the collection bin (1) is an open structure. A middle fixed arc plate (15) is fixedly connected to the middle of the open end of the collection bin (1). Arc-shaped closing plates (14) are slidably connected to both ends of the middle fixed arc plate (15). The length of the arc-shaped closing plate (14) is greater than the compression limit length of the first execution disc group (2a) and the second execution disc group (2b), and the length of the arc-shaped closing plate (14) is less than the expansion limit length of the first execution disc group (2a) and the second execution disc group (2b). The lengths of the two arc-shaped closing plates (14) are equal. Filter cloth surfaces (25) are arranged on both sides of the bottom surface of the filter and pressure dual-purpose disc (2). The interior of the filter and pressure dual-purpose disc (2) is a hollow structure. A liquid suction pipeline (21) for sucking the filtrate inside the filter and pressure dual-purpose disc (2) and a vacuum suction pipeline (22) communicating with an external vacuum pumping device to form a negative pressure inside the filter and pressure dual-purpose disc (2) are arranged on the side surface of the filter and pressure dual-purpose disc (2). Adjacent two filter and pressure dual-purpose discs (2) are closed by a disc connection telescopic plate (3). The disc connection telescopic plate (3) includes a central plate (31) and side connection storage plates (32) fixedly connected to the side surface of the filter and pressure dual-purpose disc (2). The central plate (31) is slidably connected between two opposite side connection storage plates (32). A gypsum delivery pipeline (33) is arranged on the top of the central plate (31). The gypsum delivery pipeline (33) is communicated with an external gypsum liquid supply and delivery system. The disc connection telescopic plate (3), the filter and pressure dual-purpose disc (2), the arc-shaped closing plate (14), and the middle fixed arc plate (15) cooperate to form a sealed pressure filtration environment.

2. The tail gas treatment gypsum pressure filtration system according to claim 1, characterized in that: Both sides of the dual-purpose filter and pressure plate (2) are provided with connecting sleeves (23). Two guide rods (13) are provided on the collection bin (1). The connecting sleeve (23) is slidably connected to the guide rod (13). One of the guide rods (13) is fixedly connected to the collection bin (1), and the other guide rod (13) is slidably connected through an extension chute (12). The connecting sleeve (23) on one side of the dual-purpose filter and pressure plate (2) is fixedly connected to the dual-purpose filter and pressure plate (2). A sleeve adjustment chute (24) is provided on the other side of the dual-purpose filter and pressure plate (2). The connecting sleeve (23) on the other side of the dual-purpose filter and pressure plate (2) is slidably connected to the sleeve adjustment chute (24). The end of the collection bin (1) is fixedly connected to the sliding guide rod (13) through a connecting bracket (11). The connecting bracket (11) is rotatably connected to the collection bin (1).

3. The tail gas treatment gypsum pressure filtration system according to claim 2, characterized in that: A matching chute (141) is provided on the top of the arc-shaped closing plate (14) near one side of the sliding guide rod (13). The connecting sleeve (23) slides inside the sleeve adjustment chute (24) through a slider (231). An electromagnet (232) is provided at the bottom of the sliding connecting sleeve (23). Expansion blocks (233) are magnetically connected to both sides of the electromagnet (232). The expansion blocks (233) are slidably connected in cooperation with the matching chute (141). A groove with the same shape and specifications as the matching chute (141) is provided at the top of the middle fixed arc plate (15).

4. The tail gas treatment gypsum pressure filtration system according to claim 1, characterized in that: A U-shaped gypsum separation elastic sheet (5) is provided between two adjacent dual-purpose filter and pressure plates (2). When the U-shaped gypsum separation elastic sheet (5) is static, the side wall of the U-shaped gypsum separation elastic sheet (5) is attached to the filter cloth surface (25), and the top surface of the U-shaped gypsum separation elastic sheet (5) is attached to the bottom surface of the side connection and storage plate (32). The width of the central plate (31) is greater than the diameter of the gypsum delivery pipeline (33).

5. The tail gas treatment gypsum pressure filtration system according to claim 1, characterized in that: The pipeline of the liquid extraction pipeline (21) extending to the inner wall of the dual-purpose filter and pressure plate (2) extends along the shape of the inner wall of the dual-purpose filter and pressure plate (2) to the bottom end of the dual-purpose filter and pressure plate (2). The vacuum suction pipeline (22) is located above the liquid extraction pipeline (21).

6. The tail gas treatment gypsum pressure filtration system according to claim 1, characterized in that: When the dual-purpose filter and pressure plate (2) is at the compression limit, the central plate (31) is completely stored inside the side connection and storage plate (32). The delivery pipe orifice (331) where the bottom surface of the central plate (31) communicates with the gypsum delivery pipeline (33) is closed inside the side connection and storage plate (32). A pipeline matching arc-shaped groove (321) that matches the gypsum delivery pipeline (33) is provided at the top of the side connection and storage plate (32).

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