A precipitation filtration device for use in an evaporation causticization system

Abstract

This utility model discloses a sedimentation filtration device for use in an evaporation causticization system, belonging to the field of sedimentation filtration in evaporation causticization systems. It includes a tank and two supports. This sedimentation filtration device for evaporation causticization systems uses a three-layer filter plate with progressively smaller filter holes arranged inside the support cylinder. This allows for step-by-step filtration from coarse to medium to fine filtration, taking into account the sedimentation characteristics of materials in the evaporation causticization system. This avoids rapid clogging of a single filter layer due to large impurity particle size ranges, improving filtration efficiency and final filtrate purity, and ensuring product quality in subsequent evaporation causticization processes. The movable cover and the positioning function of the sliding plate facilitate easy removal of the support cylinder for cleaning of the three-layer filter plate. The cooperation between the discharge pipe and the lower sedimentation frame allows for precise control of the filtrate discharge rhythm via a solenoid valve, while also ensuring that any small amount of residual impurities discharged from the discharge pipe fall directly into the sedimentation frame, preventing impurities from contaminating the ground or subsequent pipelines.

Description

Technical Field

[0001] This utility model belongs to the field of precipitation filtration technology for evaporation causticization systems, and specifically relates to a precipitation filtration device used in evaporation causticization systems. Background Technology

[0002] In the production processes of industries such as chemical and papermaking, evaporation-causticization systems are commonly used, primarily for the evaporation, concentration, and causticization reactions of materials. During the operation of these systems, a certain amount of precipitated impurities are generated after the materials undergo evaporation and causticization reactions. If these precipitated impurities are not filtered and removed in a timely manner, they can affect the normal operation of subsequent processes, reduce product quality, and may even cause equipment blockage, impacting the stable operation of the system.

[0003] Currently, most sedimentation and filtration devices used in evaporation and causticization systems employ a single filtration structure, resulting in low filtration accuracy that fails to meet the demands of high-precision filtration. Furthermore, the filter residue is difficult to clean, and it is inconvenient to disassemble and replace the filter components. This not only increases the workload of the staff but also leads to excessive downtime of the system, affecting production efficiency. Utility Model Content

[0004] The purpose of this utility model is to provide a sedimentation and filtration device for use in evaporation and causticization systems, in order to solve the problems mentioned in the background art. Currently, sedimentation and filtration devices used in evaporation and causticization systems mostly adopt a single filtration structure, which has low filtration accuracy and is difficult to meet the requirements of high-precision filtration. In addition, the filter residue is difficult to clean, and it is inconvenient to disassemble the filter elements for replacement and cleaning. This not only increases the labor intensity of the staff, but also leads to excessive downtime of the system and affects production efficiency.

[0005] To achieve the above objectives, this utility model provides the following technical solution: comprising a tank and two supports;

[0006] The two brackets are respectively installed on the left and right sides of the tank body, and a cover plate is provided on the upper surface of the tank body, and a fixing component is provided on the cover plate;

[0007] The support cylinder has openings on both its upper and lower sides. Inside the support cylinder, a first filter plate, a second filter plate, and a third filter plate are installed sequentially from top to bottom. Sliding grooves are provided on both the left and right sides of the inner wall of the tank. A sliding plate is slidably installed in the sliding grooves. The filter holes on the first filter plate, the second filter plate, and the third filter plate are progressively smaller.

[0008] One end of the slide plate is fixedly connected to the support cylinder, and the inner side of the top of the support cylinder is provided with an arc-shaped surface;

[0009] A discharge pipe is connected to and installed at the bottom of the tank body. A solenoid valve is installed on the discharge pipe. An L-shaped feed pipe is connected to and installed on the cover plate.

[0010] A sedimentation frame is installed between two supports and is located directly below the discharge pipe.

[0011] By adopting the above scheme, a three-layer filter plate with progressively smaller pores is set inside the support cylinder from top to bottom. This enables step-by-step filtration from coarse to medium to fine filtration, taking into account the sedimentation characteristics of materials in the evaporation and causticization system. This avoids rapid clogging of a single filter layer due to the large range of impurity particle sizes, improves filtration efficiency and the purity of the final filtrate, and ensures the product quality of subsequent evaporation and causticization processes. The movable cover and the positioning function of the sliding plate facilitate the removal of the support cylinder at any time for cleaning of the three-layer filter plate. The cooperation between the discharge pipe and the sedimentation frame below allows for precise control of the filtrate discharge rhythm through a solenoid valve, and also allows the small amount of residual impurities discharged from the discharge pipe to fall directly into the sedimentation frame, preventing impurities from contaminating the ground or subsequent pipelines and reducing cleaning costs.

[0012] In a preferred embodiment, the fixing assembly includes three L-shaped buckles, all of which are hinged to the outer surface of the tank. The lateral portion of each buckle is located above the cover plate and is threaded with a bolt, the tail end of which is threaded to the cover plate.

[0013] The above solution, by setting up a buckle plate and bolts, and using the bolts to connect with the cover plate through threads, forms a three-point uniform fixing structure. Compared with the traditional single bolt or clip fixing, it can press the cover plate more tightly onto the top of the tank, avoiding material leakage in the evaporation and causticization system due to poor sealing of the cover plate, reducing equipment corrosion and safety hazards. The threaded connection of the bolts allows for flexible adjustment of the cover plate's tightness, and the sealing force can be adapted according to the internal pressure of the tank. At the same time, the cover plate can be opened by simply unscrewing three bolts. Compared with welding or complex locking structures, it greatly simplifies the cover plate disassembly and assembly process, making it easier to inspect or replace the support cylinder and filter plate inside the tank.

[0014] In a preferred embodiment, a positioning rod is provided in the slide groove, the top end of the positioning rod is fixedly connected to the cover plate, and the bottom end of the positioning rod abuts against the slide plate.

[0015] By adopting the above solution, the positioning rod forms a longitudinal limit on the slide plate, which prevents the slide plate from moving up and down in the chute due to the impact of material flow on the support cylinder during the operation of the evaporation and causticization system. The positioning rod also serves as an installation guide. When the staff installs the cover plate, they can judge whether the cover plate is fully in place by the contact relationship between the slide plate and the positioning rod, without the need for additional tools to measure, thus improving the installation efficiency and accuracy of the cover plate.

[0016] In a preferred embodiment, slots are provided on both sides of the upper surface of the sedimentation frame, and a card plate is provided in the slot. A sealing plate that matches the opening of the sedimentation frame is installed on the upper surface of the two card plates.

[0017] The above solution, by setting up a clamping plate and a sealing plate, allows the sealing plate to be inserted into the slot of the sedimentation frame through the clamping plate, thus covering the opening of the sedimentation frame. This prevents the filter residue collected in the sedimentation frame from scattering due to dust falling from the workshop or accidental contact by personnel. At the same time, it prevents the volatilization of residual alkaline liquid in the filter residue, reducing pollution to the workshop environment and the risk of skin contact with personnel. The detachable structure of the clamping plate and the slot allows for easy cleaning of the sedimentation frame by simply removing the sealing plate upwards. The sealing plate is also sized to correspond to the opening of the sedimentation frame, achieving precise sealing. Compared with traditional canvas covering or no sealing design, the sealing performance is superior, meeting the stringent environmental and safety requirements of the evaporation causticization system.

[0018] In a preferred embodiment, L-shaped drain pipes are connected to both the front and rear sides of the bottom of the sedimentation frame, and a first valve is installed on the horizontal part of the drain pipe.

[0019] By adopting the above solution, an emptying pipe is installed. The horizontal part of the emptying pipe is easy to connect to a hose, which can guide the emptied liquid to a designated recycling container, realize liquid recycling and reuse, reduce water and raw material waste, and meet the energy conservation and consumption reduction requirements of chemical production.

[0020] In a preferred embodiment, an annular support plate is installed inside the tank, the support plate is located below the support cylinder, and the bottom end of the support cylinder is in close contact with the support plate.

[0021] By adopting the above solution, a support plate is set below the support cylinder and in close contact with the bottom of the support cylinder. This provides bottom support for the support cylinder, shares the weight of the support cylinder, avoids the slide plate and slide rail from being subjected to excessive pressure for a long time and thus wears out, extends the service life of the slide rail and slide plate, and reduces equipment maintenance costs.

[0022] In a preferred embodiment, an annular pipe is installed on the lower surface of the cover plate, and a plurality of flushing pipes are connected to the annular pipe. The flushing pipes are in contact with the inner wall of the tank. An external connecting pipe is connected to the cover plate, and the bottom end of the external connecting pipe is connected to the annular pipe.

[0023] By adopting the above scheme, by setting up a ring pipe and a flushing pipe, the external pipe can be connected to an external high-pressure water source. The cleaning fluid is evenly distributed to several flushing pipes through the ring pipe. The flushing pipes are in contact with the inner wall of the tank, which can flush the inner wall of the tank in all directions, remove the attached caustic precipitates and impurities, and avoid long-term accumulation of impurities that may cause tank corrosion or support cylinder jamming.

[0024] In a preferred embodiment, L-shaped drain pipes are connected and installed on both the left and right sides of the bottom front side of the tank, and a second valve is installed on the drain pipe.

[0025] By adopting the above solution, a sewage pipe is installed. When the equipment is shut down for maintenance, the second valve can be opened through the sewage pipe to drain the sewage cleaned inside the tank. This prevents impurities from accumulating and clogging the discharge pipe or corroding the bottom of the tank, thus ensuring the smooth operation of the discharge pipe.

[0026] Compared with the prior art, the beneficial effects of this utility model are:

[0027] This sedimentation and filtration device for use in evaporation and causticization systems employs a three-layer filter plate with progressively smaller pore sizes inside the support cylinder. This allows for step-by-step filtration from coarse to medium to fine filtration, taking into account the sedimentation characteristics of materials in the evaporation and causticization system. This avoids rapid clogging of a single filter layer due to large particle sizes of impurities, improves filtration efficiency and final filtrate purity, and ensures product quality in subsequent evaporation and causticization processes. The movable cover and the positioning function of the sliding plate facilitate the removal of the support cylinder for cleaning of the three-layer filter plate at any time. The cooperation between the discharge pipe and the sedimentation frame below allows for precise control of the filtrate discharge rhythm via a solenoid valve, while also ensuring that any small amount of residual impurities discharged from the discharge pipe fall directly into the sedimentation frame, preventing impurities from contaminating the ground or subsequent pipelines and reducing cleaning costs.

[0028] This sedimentation and filtration device for use in evaporation and causticization systems uses a buckle plate and bolts. The bolts are threadedly connected to the cover plate, forming a three-point uniform fixing structure. Compared with traditional single bolt or clip fixing, this structure can more tightly press the cover plate onto the top of the tank, preventing material leakage in the evaporation and causticization system due to poor sealing of the cover plate. This reduces equipment corrosion and safety hazards. The threaded connection of the bolts allows for flexible adjustment of the cover plate's tightness, adapting the sealing force to the internal pressure of the tank. Furthermore, the cover plate can be opened by simply unscrewing three bolts, significantly simplifying the disassembly and assembly process compared to welding or complex locking structures. This also facilitates the inspection or replacement of the support cylinder and filter plate inside the tank. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of this utility model;

[0030] Figure 2 This is a schematic diagram of the main cross-sectional structure of the tank body of this utility model;

[0031] Figure 3 This is a bottom view of the cover plate structure of this utility model.

[0032] In the diagram: 1. Support; 2. Tank; 3. Sedimentation frame; 4. Feed pipe; 5. Cover plate; 6. Slide plate; 7. Support cylinder; 8. First filter plate; 9. Second filter plate; 10. Third filter plate; 11. Discharge pipe; 12. Positioning rod; 13. Buckle plate; 14. Bolt; 15. Sealing plate; 16. Clamping plate; 17. Drain pipe; 18. Ring pipe; 19. Flushing pipe; 20. External pipe; 21. Support plate; 22. Sewage pipe. Detailed Implementation

[0033] Please see Figure 1-3 This utility model provides a precipitation filtration device for use in an evaporation causticization system, comprising a tank 2 and two supports 1;

[0034] Support 1, two supports 1 are respectively installed on the left and right sides of tank 2, and a cover plate 5 is provided on the upper surface of tank 2, and a fixing component is provided on the cover plate 5;

[0035] The support cylinder 7 has openings on both the upper and lower sides. The first filter plate 8, the second filter plate 9, and the third filter plate 10 are installed in the support cylinder 7 from top to bottom. The left and right sides of the inner wall of the tank body 2 are provided with sliding grooves. The sliding plate 6 is slidably installed in the sliding grooves. The filter holes on the first filter plate 8, the second filter plate 9, and the third filter plate 10 are progressively smaller.

[0036] One end of the slide plate 6 is fixedly connected to the support cylinder 7, and the inner side of the top of the support cylinder 7 is provided with an arc-shaped surface.

[0037] Discharge pipe 11 is connected to the bottom end of tank body 2. A solenoid valve is installed on discharge pipe 11. An L-shaped feed pipe 4 is connected to cover plate 5.

[0038] The sedimentation frame 3 is installed between the two supports 1 and is located directly below the discharge pipe 11. Through the support cylinder 7, a three-layer filter plate with progressively smaller filter holes is installed from top to bottom. This allows for step-by-step filtration from coarse to medium to fine filtration, taking into account the sedimentation characteristics of materials in the evaporation and causticization system. This avoids rapid clogging of a single filter layer due to large particle size variations, improves filtration efficiency and final filtrate purity, and ensures product quality in subsequent evaporation and causticization processes. The movable cover plate 5 and the positioning function of the sliding plate 6 facilitate the easy removal of the support cylinder 7 for cleaning the three-layer filter plate. The cooperation between the discharge pipe 11 and the sedimentation frame 3 allows for precise control of the filtrate discharge rhythm via a solenoid valve, while also ensuring that any small amount of residual impurities discharged from the discharge pipe 11 fall directly into the sedimentation frame 3, preventing contamination of the ground or subsequent pipelines and reducing cleaning costs.

[0039] The fixing assembly includes three L-shaped buckle plates 13, all of which are hinged to the outer surface of the tank body 2. The lateral part of the buckle plate 13 is located above the cover plate 5 and is threaded with bolts 14. The tail end of the bolts 14 is threaded to the cover plate 5. By setting the buckle plates 13 and bolts 14, and using the threaded connection between the bolts 14 and the cover plate 5, a three-point uniform fixing structure is formed. Compared with the traditional single bolt 14 or snap-fit ​​fixing, the cover plate 5 can be pressed more tightly to the top of the tank body 2, avoiding leakage of materials in the evaporation and causticization system due to the poor sealing of the cover plate 5, reducing equipment corrosion and safety hazards. The threaded connection of the bolts 14 makes it easy to flexibly adjust the tightness of the cover plate 5, and can adapt the sealing force according to the internal pressure of the tank body 2. At the same time, the cover plate 5 can be opened by simply unscrewing the three bolts 14. Compared with welding or complex locking structures, the disassembly and assembly process of the cover plate 5 is greatly simplified, making it easier to inspect or replace the support cylinder 7 and filter plate inside the tank body 2.

[0040] A positioning rod 12 is installed inside the chute. The top end of the positioning rod 12 is fixedly connected to the cover plate 5, and the bottom end of the positioning rod 12 abuts against the slide plate 6. The positioning rod 12 forms a longitudinal limit on the slide plate 6, which prevents the slide plate 6 from moving up and down in the chute due to the impact of material flow on the support cylinder 7 during the operation of the evaporation and causticization system. The positioning rod 12 also serves as an installation guide. When the operator installs the cover plate 5, they can judge whether the cover plate 5 is fully in place by the contact relationship between the slide plate 6 and the positioning rod 12, without the need for additional tools to measure, thus improving the installation efficiency and accuracy of the cover plate 5.

[0041] The sedimentation frame 3 has slots on both sides of its upper surface, and a retaining plate 16 is installed in each slot. A sealing plate 15, which is adapted to the opening of the sedimentation frame 3, is installed on the upper surface of both retaining plates 16. By setting the retaining plates 16 and the sealing plate 15, the sealing plate 15 is inserted into the slot of the sedimentation frame 3 through the retaining plates 16, which can cover the opening of the sedimentation frame 3. This prevents the filter residue collected in the sedimentation frame 3 from falling due to workshop dust or accidental contact by personnel. At the same time, it prevents the volatilization of residual alkaline liquid in the filter residue, reducing pollution to the workshop environment and the risk of skin contact with personnel. The detachable structure of the retaining plates 16 and the slots makes it easy to clean the sedimentation frame 3 by simply removing the sealing plate 15 upwards. The size of the sealing plate 15 corresponds to the opening of the sedimentation frame 3, which can achieve precise sealing. Compared with the traditional canvas covering or no sealing design, the sealing performance is better and it is suitable for the strict requirements of evaporation causticization system for workshop environmental protection and safety.

[0042] The front and rear sides of the bottom of the sedimentation frame 3 are connected to L-shaped drain pipes 17. A first valve is installed on the horizontal part of the drain pipe 17. By setting the drain pipe 17, the horizontal part of the drain pipe 17 can be easily connected to a hose, and the drained liquid can be guided to a designated recycling container to realize liquid recycling and reuse, reduce water and raw material waste, and meet the energy-saving and consumption-reducing requirements of chemical production.

[0043] An annular support plate 21 is installed inside the tank body 2. The support plate 21 is located below the support cylinder 7, and the bottom end of the support cylinder 7 is in close contact with the support plate 21. By setting the support plate 21, which is located below the support cylinder 7 and in close contact with the bottom end of the support cylinder 7, it can provide bottom support for the support cylinder 7, share the weight of the support cylinder 7, avoid the slide plate 6 and the slide groove from being subjected to excessive pressure for a long time and wear it out, extend the service life of the slide groove and the slide plate 6, and reduce equipment maintenance costs.

[0044] An annular pipe 18 is installed on the lower surface of the cover plate 5. Several flushing pipes 19 are connected to the annular pipe 18. The flushing pipes 19 are in contact with the inner wall of the tank 2. An external pipe 20 is connected to the cover plate 5. The bottom end of the external pipe 20 is connected to the annular pipe 18. By setting the annular pipe 18 and the flushing pipes 19, the external pipe 20 can be connected to an external high-pressure water source. The cleaning liquid is evenly distributed to the flushing pipes 19 through the annular pipe 18. The flushing pipes 19 are in contact with the inner wall of the tank 2, which can flush the inner wall of the tank 2 in all directions, remove the attached causticized precipitates and impurities, and avoid long-term accumulation of impurities that may cause corrosion of the tank 2 or jamming of the support cylinder 7.

[0045] L-shaped drain pipes 22 are installed on both the left and right sides of the bottom front side of the tank body 2. A second valve is installed on the drain pipe 22. By setting up the drain pipe 22, the second valve can be opened when the equipment is stopped for maintenance, and the sewage cleaned inside the tank body 2 can be discharged through the flushing pipe 19. This avoids the long-term accumulation of impurities that block the discharge pipe 11 or corrode the bottom of the tank body 2, and ensures the smooth operation of the discharge pipe 11.

[0046] In use, the sealing plate 15 is moved, which in turn moves the clamping plate 16, allowing the sealing plate 15 to be removed. The feed pipe 4 is then connected to the discharge equipment, and the material enters the tank 2 through the feed pipe 4. After entering the support cylinder 7, the material flows from top to bottom along the inside of the support cylinder 7, passing sequentially through the first filter plate 8, the second filter plate 9, and the third filter plate 10. These three filter plates, with progressively smaller pore sizes, achieve a progressive impurity interception from coarse filtration to medium filtration to fine filtration. The first filter plate 8 has the largest pore size, mainly intercepting larger particle size sediment impurities in the material, initially reducing the impurity content in the material, and preventing large particles from clogging the subsequent fine-pore filter plates, ensuring overall filtration smoothness. The second filter plate 9 has a smaller pore size than the first filter plate 8, which can further intercept medium-sized particle size sediments in the material, reducing the impact of impurities on subsequent fine filtration. The load of the dense filtration process finally flows through the third filter plate 10, which has the smallest pore size and can accurately intercept suspended impurities of small particle size in the material, ensuring that the purity of the filtrate after filtration meets the requirements of the subsequent processes of the evaporation and causticization system. Then, the solenoid valve is opened, and the filtered liquid enters the sedimentation frame 3 through the discharge pipe 11. When it is necessary to clean the inner wall of the tank 2 and disassemble the support cylinder 7, loosen the bolt 14, then remove the cover plate 5, move the support cylinder 7 upward, and the support cylinder 7 drives the slide plate 6 to slide in the slide groove. Then, remove the support cylinder 7, and then reset the cover plate 5. Then, connect the external pipe 20 to the high-pressure cleaning equipment. The cleaning liquid enters the annular pipe 18 through the external pipe 20 and then is discharged through the flushing pipe 19 to clean the inside of the tank 2. Then, open the second valve to discharge the wastewater after cleaning. The operation is convenient.

Claims

1. A precipitate filter apparatus for use in an evaporative causticizing system, characterized by: It includes a tank body (2) and two supports (1); The two brackets (1) are respectively installed on the left and right sides of the tank (2), and a cover plate (5) is provided on the upper surface of the tank (2), and a fixing component is provided on the cover plate (5); The support cylinder (7) has openings on both the upper and lower sides. The support cylinder (7) is equipped with a first filter plate (8), a second filter plate (9) and a third filter plate (10) installed from top to bottom. The inner wall of the tank (2) is provided with sliding grooves on both the left and right sides. A sliding plate (6) is slidably installed in the sliding grooves. The filter holes on the first filter plate (8), the second filter plate (9) and the third filter plate (10) are progressively smaller. One end of the slide plate (6) is fixedly connected to the support cylinder (7), and the inner side of the top of the support cylinder (7) is provided with an arc-shaped surface; A discharge pipe (11) is connected to the bottom end of the tank body (2). A solenoid valve is installed on the discharge pipe (11). An L-shaped feed pipe (4) is connected to the cover plate (5). A sedimentation frame (3) is installed between two supports (1) and is located directly below the discharge pipe (11).

2. The precipitate filter apparatus for use in an evaporative causticizing system as claimed in claim 1, wherein: The fixing assembly includes three L-shaped buckles (13), all three buckles (13) are hinged to the outer surface of the tank body (2), the lateral portion of the buckle (13) is located above the cover plate (5) and is threaded with bolts (14), the tail end of the bolts (14) is threaded to the cover plate (5).

3. The precipitate filter apparatus for use in an evaporative causticizing system according to claim 1, wherein: A positioning rod (12) is provided in the chute. The top end of the positioning rod (12) is fixedly connected to the cover plate (5), and the bottom end of the positioning rod (12) abuts against the slide plate (6).

4. The precipitation filtration device for use in an evaporation causticizing system according to claim 1, characterized in that: The sedimentation frame (3) has slots on both sides of its upper surface, and a card plate (16) is provided in the slot. The upper surfaces of the two card plates (16) are jointly fitted with a sealing plate (15) that is compatible with the opening of the sedimentation frame (3).

5. The precipitation filtration device for use in an evaporation causticizing system according to claim 1, characterized in that: The sedimentation frame (3) has L-shaped drain pipes (17) installed on both the front and rear sides of its bottom end, and a first valve is installed on the horizontal part of the drain pipe (17).

6. The precipitation filtration device for use in an evaporation causticizing system according to claim 1, characterized in that: An annular support plate (21) is installed inside the tank (2). The support plate (21) is located below the support cylinder (7), and the bottom end of the support cylinder (7) is in close contact with the support plate (21).

7. The precipitation filtration device for use in an evaporation causticizing system according to claim 1, characterized in that: An annular pipe (18) is installed on the lower surface of the cover plate (5). Several flushing pipes (19) are connected to the annular pipe (18). The flushing pipes (19) are in contact with the inner wall of the tank (2). An external pipe (20) is connected to the cover plate (5). The bottom end of the external pipe (20) is connected to the annular pipe (18).

8. The precipitation filtration device for use in an evaporation causticizing system according to claim 1, characterized in that: The tank body (2) has L-shaped drain pipes (22) installed on both the left and right sides of the bottom front side, and a second valve is installed on the drain pipes (22).

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