Two-stage drying and decarburizing filter

Abstract

The invention discloses a two-stage drying and decarburizing filter, which comprises a filter tank, and a seal head and a fluid treatment assembly which are arranged on the filter tank, and also comprises a filter pressing pipe which is arranged at the bottom of the filter tank, and a communication structure is arranged between the filter tank and the filter pressing pipe; the cover pipe is arranged on the filter pressing pipe, and a filtering structure is arranged in the cover pipe; according to the first-stage drying structure, an extrusion mechanism is arranged in a filter pressing pipe; according to the second-stage drying structure, an air inlet and an air outlet are formed in the side wall of the cover pipe. According to the method, firstly, moisture in impurities is removed in the first-stage drying stage, and then penetrating purging is performed in the second-stage drying stage, so that the liquid content of a catalyst or activated carbon is reduced, raw material waste caused by waste of high-price materials in the form of wet waste residues is avoided, and the overall operation cost can be reduced; and secondly, impurities are discharged in a dry state with low liquid content, residual liquid is sealed and intercepted by a rubber ring, leakage and odor diffusion are avoided, the field environment is clean and tidy, and the environment-friendly discharge requirement is met.

Description

Technical Field

[0001] The present invention relates to the technical field of filters, in particular to a two-stage drying and decarbonization filter. Background Art

[0002] Decarbonization filter is a precision filtration equipment that uses adsorption media such as activated carbon or molecular sieve to efficiently remove carbon dioxide, pigments and organic impurities from gases or liquids in a closed pressure tank. It is widely used in the decarbonization, decolorization and purification processes of food sugar solution, pharmaceutical, natural gas and flue gas treatment industries.

[0003] The existing process uses an outside-in, inside-out filtration method, where the feed enters tangentially from the filter housing. Large impurities are first trapped on the filter material surface to form a filter cake. The filter cake then uses its "bridging" effect to capture smaller particles, achieving high filtration accuracy with a simple structure. However, as the filter cake thickens, the system pressure differential increases rapidly, necessitating shutdown for backflushing. While traditional backflushing involves only a single purge with compressed gas, this rapidly removes slag and removes some surface liquid, but the drying depth is insufficient. The discharged catalyst or activated carbon remains in a slurry state with a high liquid content of 60% to 85%, making it impossible to directly recycle and requiring only wet waste for subsequent processing.

[0004] Waste residues with high liquid content can only be dried or outsourced for processing, which not only causes a large amount of valuable catalysts / activated carbon to be discarded and a surge in raw material costs, but also the organic residues in the wet material are prone to leakage, posing a secondary pollution risk to the on-site environment and external ecology.

[0005] Based on the above-mentioned defects, a two-stage drying and decarbonization filter is provided. Summary of the Invention

[0006] The purpose of the present invention is to propose a two-stage drying and decarbonization filter in order to solve the above problems.

[0007] In order to achieve the above object, the present invention adopts the following technical solution: a two-stage drying and decarbonization filter, comprising a filter tank, a head and a fluid processing assembly mounted on the filter tank, and further comprising: Filter press tube: It is arranged at the bottom of the filter tank and is arranged vertically and tilted relative to the filter tank. A communication structure is provided between the filter tank and the filter press tube. Impurities trapped by the filter tank fall into the filter press tube through the communication structure. Cover pipe: It is installed on the filter press tube. The inside of the cover pipe is provided with a filtering structure. Impurities falling into the filter press tube are accumulated in the filtering structure under the action of gravity. Primary drying structure: The filter press tube is provided with an extrusion mechanism to filter and dehydrate the impurities accumulated in the filter structure; Secondary drying structure: An air inlet and an exhaust port are provided on the side wall of the cover pipe, and the air inlet and exhaust port are staggered in back to back on the cover pipe so that the dry gas can cover the accumulated impurities when entering and exiting the cover pipe.

[0008] Preferably, the filtering structure comprises a filter cartridge embedded in the cover tube, and a gap is formed between the filter cartridge and the cover tube to cooperate with the flow of the dry gas.

[0009] Preferably, the squeezing mechanism comprises a push plate slidably arranged in the filter press tube, and an oil cylinder for controlling the movement of the push plate is installed on the filter press tube.

[0010] Preferably, filter cartridge flanges are fixedly provided at both ends of the filter cartridge, and a sealing structure cooperating with the filter cartridge flange to prevent residual liquid from leaking is provided on the cover tube.

[0011] Preferably, the sealing structure includes a first flange, a second flange, a rubber ring and a fastener for locking the first flange and the second flange; A groove for embedding a matching rubber ring is formed on one side of the first flange opposite to the second flange, and on the opposite sides of the two filter cartridge flanges.

[0012] Preferably, the side wall of the filter press tube is provided with a plurality of circumferentially distributed viewing windows, through which the accumulation state of impurities in the filter press tube can be observed.

[0013] Preferably, the communication structure includes a communication pipe fixed on the filter press tube, and a butterfly valve is connected between the communication pipe and the filter tank through a flange clamp.

[0014] Preferably, the fluid processing assembly comprises: The decarbonization filter tube is set in the filter tank to decarbonize the liquid entering the filter tank. Impurities are intercepted and accumulated on the surface of the decarbonization filter tube to form filter cakes. The feed port and the converging structure, wherein the liquid inlet end of the feed port and the liquid outlet end of the converging structure are staggered and arranged on both sides of the filter tank in reverse, so as to coordinate the inflow and outflow of the feed liquid and enable the feed liquid to cover the decarbonization filter tube when entering and exiting the filter tank; The reflux port is fixed on the side wall of the filter tank to return the incompletely filtered liquid to the filter tank for re-filtration.

[0015] Preferably, the converging structure includes a row pipe and a converging pipe fixed in the filter tank, the bottom of the row pipe is connected and fixed with the decarbonization filter pipe, the row pipe and the converging pipe are connected and fixed through a flange, and the converging pipe is integrated with a liquid outlet, a backwash port and a backflush port.

[0016] Preferably, a support frame is fixed in the filter tank to coordinate with the decarbonization filter tube for stable installation.

[0017] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: 1. In this application, in the primary drying stage, a push plate is used for mechanical extrusion to first remove most of the free water in the impurities, and then in the secondary drying stage, a cross-flow hot gas is used for penetration and purging, so that the liquid content of the catalyst or activated carbon finally discharged is reduced from the traditional 60% to 85% to a level that can be used in the engineering, and can be directly returned to production, avoiding the waste of raw materials caused by the disposal of high-priced materials in the form of wet waste residue.

[0018] 2. In this application, since the impurities have been deeply dried in the machine, a series of additional processes such as wet slag transfer, drying, and re-drying can be omitted, which significantly shortens the process, saves labor and energy costs, and thus reduces the overall operating cost.

[0019] 3. In this application, impurities are discharged in a dry state with low liquid content through a sealed cover tube and a double drying structure. The residual liquid is intercepted by a rubber ring seal, without leakage or odor diffusion. The on-site environment is clean and tidy, meeting environmental emission requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It shows a schematic diagram of the overall structure of a filter provided according to an embodiment of the present invention; Figure 2 A schematic diagram of the top view of a filter according to an embodiment of the present invention is shown; Figure 3 A schematic structural diagram of a filter press tube provided in an embodiment of the present invention is shown; Figure 4 It shows that according to the present invention Figure 3 A partial enlarged schematic diagram of point A is provided; Figure 5 It shows that according to the present invention Figure 3 A local enlarged schematic diagram of point B is provided.

[0021] Legend: 1. Filter tank; 2. Drain pipe; 3. Decarbonization filter tube; 4. Support frame; 5. Converging pipe; 6. Liquid outlet; 7. Backwash port; 8. Backflush port; 9. Head; 10. Feed port; 11. Return port; 12. Connecting pipe; 13. Butterfly valve; 14. Filter press tube; 15. Cover pipe; 16. First flange; 17. Second flange; 18. Filter cartridge; 19. Filter cartridge flange; 20. Rubber ring; 21. Fastener; 22. Air inlet; 23. Exhaust port; 24. Window; 25. Oil cylinder; 26. Push plate. DETAILED DESCRIPTION

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0023] See also Figure 1-5 The present invention provides a technical solution: a two-stage drying and decarbonization filter, comprising a filter tank 1, a head 9 and a fluid processing assembly mounted on the filter tank 1, and further comprising: Filter press tube 14: arranged at the bottom of the filter tank 1, the filter press tube 14 is arranged vertically inclined relative to the filter tank 1, and a connecting structure is provided between the filter tank 1 and the filter press tube 14, and the impurities intercepted by the filter tank 1 fall into the filter press tube 14 through the connecting structure.

[0024] The filter press tube 14 serves as a carrier for receiving and processing impurities. Its vertically inclined arrangement can utilize gravity to allow impurities retained by the filter tank 1 to naturally fall into the tube through the connecting structure, providing a stable impurity accumulation environment for subsequent drying treatment.

[0025] The cover tube 15 is arranged on the filter press tube 14. A filtering structure is provided inside the cover tube 15. Impurities falling into the filter press tube 14 are accumulated in the filtering structure under the action of gravity.

[0026] The cover tube 15 cooperates with the filter press tube 14 to form a drying space. The internal filtering structure provides a carrier for impurities to accumulate and creates conditions for the flow of secondary drying gas.

[0027] The cover pipe 15 and the filter press tube 14 can be fixed by direct welding. Alternatively, they can be fixed by flange joints. Matching flanges are welded to the filter press tube 14 and the cover pipe 15, and the two flanges are locked with a hinge-T-bolt quick-open structure, which ensures sealing and can be opened and closed as a whole.

[0028] Primary drying structure: The filter press tube 14 is provided with an extrusion mechanism to filter and dehydrate the impurities accumulated in the filter structure.

[0029] The accumulated impurities are physically filtered and dehydrated by the squeezing mechanism in the filter press tube 14, and a large amount of free water is quickly removed, laying the foundation for secondary drying.

[0030] Secondary drying structure: The sidewall of the hood tube 15 is provided with an air inlet 22 and an exhaust port 23. These ports are staggered in opposite directions, allowing the drying gas to cover accumulated impurities as it enters and exits the hood tube 15. Both the air inlet 22 and the exhaust port 23 are short tubes, fully welded to the sidewall of the hood tube 15 at their bases.

[0031] The secondary drying ensures full contact between the drying gas and impurities through gas cross-flow. Combined with the primary drying structure, it can effectively reduce the liquid content of impurities after filtration. This not only facilitates the recycling of impurities such as catalysts and activated carbon, reducing raw material waste, but also reduces the risk of secondary pollution caused by wet waste residue, solving the problem of incomplete drying caused by traditional equipment relying on single backflushing.

[0032] Specifically, such as Figure 1-5 As shown, the filtering structure includes a filter cartridge 18 embedded in the cover tube 15 , and a gap is formed between the filter cartridge 18 and the cover tube 15 to cooperate with the flow of dry gas.

[0033] Filter cartridge 18 is embedded within cover tube 15. The gap between it and cover tube 15 provides a channel for the flow of drying gas. This, combined with the staggered inlet 22 and exhaust 23 in the secondary drying structure, ensures that the drying gas evenly covers the impurities accumulated within filter cartridge 18, improving gas drying efficiency. Furthermore, filter cartridge 18, acting as a direct carrier for impurities, further intercepts fine impurities and prevents them from leaking with residual liquid.

[0034] The squeezing mechanism includes a push plate 26 slidably disposed in the filter press tube 14 , and an oil cylinder 25 for controlling the movement of the push plate 26 is installed on the filter press tube 14 .

[0035] The squeezing mechanism realizes the primary drying function through the cooperation of the push plate 26 and the oil cylinder 25. The oil cylinder 25 drives the push plate 26 to slide in the filter press tube 14, physically squeezing the impurities accumulated in the filter cartridge 18, and quickly removing the free moisture therein. The dehydration efficiency is high through mechanical squeezing, which can significantly reduce the initial liquid content of impurities and reduce the energy consumption and time of subsequent gas drying.

[0036] Filter cartridge flanges 19 are fixedly provided at both ends of the filter cartridge 18 , and a sealing structure is provided on the cover tube 15 to cooperate with the filter cartridge flange 19 to prevent residual liquid from leaking out.

[0037] The sealing structure includes a first flange 16, a second flange 17, a rubber ring 20 and a fastener 21 for locking the first flange 16 and the second flange 17. A groove for embedding the rubber ring 20 is formed on the side of the first flange 16 opposite to the second flange 17 and on the opposite sides of the two filter cartridge flanges 19.

[0038] The cartridge flanges 19 at each end of the filter cartridge 18 are sealed against the first and second flanges 16, 17 on the cover tube 15 by rubber rings 20. Grooves ensure precise positioning of the rubber rings 20 to prevent displacement. Fasteners 21 secure the first and second flanges 16, 17. Mechanical force fully deforms the rubber rings 20, filling the gap between the flanges and creating a reliable seal. Fasteners 21 utilize a conventional hinge-T-bolt quick-release mechanism for locking.

[0039] This sealing structure not only prevents environmental pollution caused by leakage of residual liquid, but also ensures that the dry gas inside the cover tube 15 is discharged outward only through the exhaust port 23 after fully contacting the impurities in the filter cartridge 18, thereby avoiding gas leakage affecting the drying effect. At the same time, it facilitates the disassembly, assembly and maintenance of the filter cartridge 18, thereby improving the usability of the equipment.

[0040] The rubber ring 20 is made of fluororubber, a material with excellent corrosion resistance. Fluororubber can withstand various corrosive media that may be present in the filtration process, preventing erosion and failure of the rubber ring 20. Its high-temperature resistance is well-suited to the temperature of the drying gas in the secondary drying structure, maintaining elasticity and sealing properties at higher temperatures. Fluororubber is also resistant to aging and wear, and can withstand long-term flange compression and friction, extending the service life of the sealing structure.

[0041] Specifically, such as Figure 1 and Figure 3 As shown, a plurality of circumferentially distributed viewing windows 24 are installed on the side wall of the filter press tube 14 , through which the accumulation state of impurities in the filter press tube 14 can be observed.

[0042] The multiple circumferentially distributed viewing windows 24 allow the operator to observe the accumulation state of impurities in the filter press tube 14 in real time, making it easier to judge the timing of extrusion drying, avoiding excessive accumulation of impurities that affects processing efficiency or insufficient accumulation that causes energy waste, and improving the accuracy of operation.

[0043] The communication structure includes a communication pipe 12 fixed on the filter press 14 , and a butterfly valve 13 is connected between the communication pipe 12 and the filter tank 1 through a flange clamp.

[0044] A butterfly valve 13 is fixedly installed on the connecting pipe 12 and connected to the filter tank 1 through a flange clamp. The butterfly valve 13 can flexibly control the transportation of impurities retained by the filter tank 1 to the filter press tube 14. It can be closed during the filtration stage to ensure the pressure stability in the filter tank 1, and can be opened to achieve directional transportation when impurities need to be treated.

[0045] Specifically, such as Figure 1 and Figure 2 As shown, the fluid handling assembly includes: The decarbonization filter tube 3 is arranged in the filter tank 1 to perform decarbonization filtration on the liquid entering the filter tank 1. Impurities are intercepted and accumulated on the surface of the decarbonization filter tube 3 to form a filter cake. A support frame 4 is fixed in the filter tank 1 to stably support the decarbonization filter tube 3.

[0046] The decarbonization filter tube 3 forms a filter cake by intercepting impurities and utilizes the "bridging" effect of the filter cake to improve the filtration accuracy.

[0047] The decarbonization filter tube 3 has a plum blossom-shaped cross-section, with multiple flow channels formed by several axial ridges. This increases the filtration area, reduces differential pressure at the same flow rate, and slows filter cake thickening. The ridges and support frame 4 form a six-point positioning system, ensuring more stable operation. During backflush, the force applied to each channel is evenly distributed, facilitating the complete shedding of the filter cake and reducing residual liquid, thereby extending the single-cycle operation time and improving the activated carbon recovery rate.

[0048] The feed port 10 and the converging structure, the liquid inlet end of the feed port 10 and the liquid outlet end of the converging structure are staggered and arranged on both sides of the filter tank 1 in a back-to-back manner, so as to coordinate the inflow and outflow of the feed liquid so that the feed liquid can cover the decarbonization filter tube 3 when entering and exiting the filter tank 1.

[0049] The feed inlet 10 and the liquid outlet end of the convergence structure are staggered in back-to-back arrangement, so that the feed liquid fully covers the decarbonization filter tube 3 when flowing in the filter tank 1, avoiding insufficient local filtration, thereby improving contact efficiency.

[0050] The reflux port 11 is fixed on the side wall of the filter tank 1 to return the incompletely filtered liquid to the filter tank 1 for re-filtration. The reflux port 11 guides the substandard liquid back to the filter tank 1 for secondary filtration to ensure the purity of the discharge and reduce waste.

[0051] The converging structure includes a drain pipe 2 and a converging pipe 5 fixed in the filter tank 1. The bottom of the drain pipe 2 is connected and fixed with the decarbonization filter tube 3. The drain pipe 2 and the converging pipe 5 are connected and fixed through a flange. The converging pipe 5 is integrated with a liquid outlet 6, a backwash port 7 and a backflush port 8.

[0052] The integrated liquid outlet 6 of the converging pipe 5 is used to guide out qualified feed liquid, and the cleaning liquid is introduced through the backwash port 7 to clean the decarbonization filter tube 3. The decarbonization filter tube 3 is reversely purged by compressed gas through the backflush port 8. When the filter cake on the surface of the decarbonization filter tube 3 accumulates to a certain extent, which may cause the filtration efficiency to decrease or the system pressure difference to increase, the compressed gas introduced through the backflush port 8 can impact the surface of the filter tube in the reverse direction, and peel off the accumulated impurities (filter cake) from the decarbonization filter tube 3.

[0053] The above description of the embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A two-stage drying and decarbonization filter, comprising a filter tank (1), a head (9) and a fluid processing assembly mounted on the filter tank (1), characterized in that: Also includes: A filter press tube (14) is arranged at the bottom of the filter tank (1), the filter press tube (14) is arranged vertically and tilted relative to the filter tank (1), and a communication structure is provided between the filter tank (1) and the filter press tube (14), so that impurities retained by the filter tank (1) fall into the filter press tube (14) through the communication structure; A cover tube (15) is provided on the filter press tube (14). A filtering structure is provided inside the cover tube (15). Impurities falling into the filter press tube (14) are accumulated in the filtering structure under the action of gravity. Primary drying structure: the filter press tube (14) is provided with an extrusion mechanism to filter and dehydrate the impurities accumulated in the filter structure; Secondary drying structure: An air inlet (22) and an air outlet (23) are provided on the side wall of the cover tube (15), and the air inlet (22) and the air outlet (23) are staggered and arranged on the cover tube (15) in a back-to-back manner, so that the drying gas can cover the accumulated impurities when entering and exiting the cover tube (15).

2. A two-stage drying and decarbonization filter according to claim 1, characterized in that: The filtering structure comprises a filter cartridge (18) embedded in the cover tube (15), with a gap formed between the filter cartridge (18) and the cover tube (15) to facilitate the flow of dry gas.

3. A two-stage drying and decarbonization filter according to claim 1, characterized in that: The squeezing mechanism comprises a push plate (26) slidably arranged in the filter press tube (14), and an oil cylinder (25) for controlling the movement of the push plate (26) is installed on the filter press tube (14).

4. A two-stage drying and decarbonization filter according to claim 2, characterized in that: Both ends of the filter cartridge (18) are fixedly provided with filter cartridge flanges (19), and the cover tube (15) is provided with a sealing structure that cooperates with the filter cartridge flange (19) to prevent residual liquid from leaking.

5. A two-stage drying and decarbonization filter according to claim 4, characterized in that: The sealing structure includes a first flange (16), a second flange (17), a rubber ring (20), and a fastener (21) for locking the first flange (16) and the second flange (17); A groove for embedding the matching rubber ring (20) is formed on the side of the first flange (16) opposite to the second flange (17) and on the opposite sides of the two filter cartridge flanges (19).

6. A two-stage drying and decarbonization filter according to claim 1, characterized in that: The side wall of the filter press tube (14) is provided with a plurality of circumferentially distributed viewing windows (24), through which the accumulation state of impurities in the filter press tube (14) can be observed.

7. A two-stage drying and decarbonization filter according to claim 1, characterized in that: The communication structure comprises a communication pipe (12) fixedly mounted on the filter press (14), and a butterfly valve (13) is connected between the communication pipe (12) and the filter tank (1) via a flange clamp.

8. A two-stage drying and decarbonization filter according to claim 1, characterized in that: The fluid handling assembly comprises: The decarbonization filter tube (3) is arranged in the filter tank (1) to perform decarbonization filtration on the liquid entering the filter tank (1), and the impurities are intercepted and accumulated on the surface of the decarbonization filter tube (3) to form a filter cake; A feed inlet (10) and a converging structure, wherein the liquid inlet end of the feed inlet (10) and the liquid outlet end of the converging structure are staggered and arranged in opposite directions on both sides of the filter tank (1), so as to coordinate the inflow and outflow of the feed liquid and enable the feed liquid to cover the decarbonization filter tube (3) when entering and exiting the filter tank (1); The reflux port (11) is fixedly provided on the side wall of the filter tank (1) to return the incompletely filtered liquid to the filter tank (1) for re-filtration.

9. A two-stage drying and decarbonization filter according to claim 8, characterized in that: The converging structure comprises a drain pipe (2) and a converging pipe (5) fixedly arranged in the filter tank (1); the bottom of the drain pipe (2) is connected and fixed to the decarbonization filter pipe (3); the drain pipe (2) and the converging pipe (5) are connected and fixed via a flange; and the converging pipe (5) is integrated with a liquid outlet (6), a backwash port (7) and a backflush port (8).

10. A two-stage drying and decarbonization filter according to claim 9, characterized in that: The filter tank (1) is provided with a support frame (4) that cooperates with the decarbonization filter tube (3) for stable installation.

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