Catalyst recovery filter assembly

Abstract

The utility model belongs to the technical field of filtration and separation, especially a catalyst recovery filter assembly, in view of the problem of filter blockage, incomplete recovery, inconvenient maintenance, unstable fixation in prior art, the present application provides the following scheme, it includes: filter equipment ontology, first filter mechanism, be located inside the filter equipment ontology, be used for filtering reaction solution, second filter mechanism, be located inside the first filter mechanism, the utility model not only effectively overcome the defects such as filter blockage, incomplete recovery, inconvenient maintenance, unstable fixation in prior art, and through the innovative " three -level filtration + automatic backwash + multiple fixed " structure combination, provide a new type catalyst recovery filter assembly of separation precision, recovery efficient, convenient maintenance, stable and reliable, provide reliable guarantee for catalyst recovery and reaction liquid purification in industrial production, have very high practical value and popularization prospect.

Description

Technical Field

[0001] This application relates to the field of filtration and separation technology, and in particular to a catalyst recovery filtration assembly. Background Technology

[0002] Catalyst recovery filtration units are key equipment in chemical reactions, pharmaceutical production, and environmental treatment, used to achieve efficient separation of reaction liquids and catalysts, and to recover and reuse catalysts, thereby reducing production costs and waste emissions. Currently, most mainstream catalyst recovery filtration devices adopt multi-stage filter structures, using filter screens of different pore sizes to achieve stratified separation of impurities from catalysts and catalysts from reaction liquids.

[0003] Chinese utility model patent CN221107299U discloses a catalyst recovery and filtration device, including a tank. A filter assembly is rotatably connected to the inner wall of the tank. The filter assembly includes a connecting pipe and a filter cover. A fixing plate is fixedly connected to the surface of the tank. A feed pipe passes through the surface of the fixing plate. One end of the feed pipe is rotatably connected to the inner wall of the connecting pipe via a bearing. A transmission assembly is fixedly connected to the surface of the tank. By setting a sealing assembly, the threaded column drives the threaded pipe and the sealing plug to move upward, thereby facilitating the opening of the discharge pipe and allowing the separated catalyst to be discharged through the discharge pipe, facilitating the next catalyst separation operation. By setting the discharge assembly, when the discharge pipe discharges, the first rotating shaft drives the connecting plate and the brush to rotate, thereby cleaning the catalyst in the filter cover and ensuring that the catalyst is completely discharged.

[0004] The shortcomings of existing technologies: frequent filter clogging and limited efficiency: the filter structure of traditional devices is simple and lacks a targeted anti-clogging mechanism. Large particles of impurities in the reaction liquid easily adhere to the filter surface, causing blockage quickly, resulting in a decrease in filtration flow and requiring frequent shutdowns for cleaning, which seriously affects production efficiency.

[0005] Incomplete catalyst recovery leads to resource waste: when catalysts are separated through a single fine filtration process, some smaller catalyst particles can easily penetrate the filter screen or adhere to the surface of the filter media, making them impossible to recover effectively. This not only increases the cost of catalyst consumption but may also affect the subsequent reaction results due to catalyst loss.

[0006] Cleaning and maintenance are inconvenient and affect continuous production: cleaning the filter screen requires manual disassembly of the entire filter mechanism, which is cumbersome and time-consuming. In addition, the disassembly process can easily damage the filter media or reduce the sealing performance, which cannot meet the needs of continuous production.

[0007] Unstable fixed structure affects filtration accuracy: Most filter modules are fixed with simple bolts or overlapped. They are in a high-pressure and vibrating working environment for a long time, which can easily cause them to loosen or shift. This can lead to poor sealing between filter layers, resulting in filtration leakage and reducing filtration and separation accuracy.

[0008] Existing technologies suffer from defects such as filter clogging, incomplete recovery, inconvenient maintenance, and unstable fixation, which limit the efficiency and reliability of catalyst recovery filtration. Utility Model Content

[0009] In order to improve the problems of filter clogging, incomplete recovery, inconvenient maintenance and unstable fixation in the existing technology, this application provides a catalyst recovery filter assembly.

[0010] The catalyst recovery filtration assembly provided in this application adopts the following technical solution: A catalyst recovery filtration assembly includes: a filtration device body; The first filtration mechanism is located inside the main body of the filtration device and is used to filter the reaction liquid; The second filtration mechanism, located inside the first filtration mechanism, is used to filter the catalyst; A catalyst recovery mechanism, located at the bottom of the second filtration mechanism, is used to recover the catalyst; The third filtration mechanism, located inside the second filtration mechanism, is used to filter impurities. A cleaning device is located inside the filter equipment body and is used to clean the catalyst of the second filtration mechanism. A fixing device is provided on the inner wall of the filter equipment body to fix the first filter mechanism, the second filter mechanism, the catalyst recovery mechanism and the third filter mechanism inside the fixing tank.

[0011] Preferably, the first filtration mechanism includes a third fixed frame, a purification filter module is fixedly connected to the bottom of the third fixed frame, and a rubber clip is fixedly connected to the bottom of the third fixed frame.

[0012] Preferably, the second filtration mechanism includes a fine filtration membrane module, a rubber seal is embedded in the groove of the third fixing frame, a second fixing frame is sleeved inside the rubber seal, and the bottom of the second fixing frame is fixedly connected to the fine filtration membrane module.

[0013] Preferably, the catalyst recovery mechanism includes a one-way valve and a catalyst recovery frame. A funnel is fixedly connected to the bottom of the fine filtration membrane module. The one-way valve is installed at the bottom of the funnel. The inlet of the catalyst recovery frame is engaged with the outlet of the one-way valve.

[0014] Preferably, the third filtration mechanism includes a first fixed frame and a plurality of fixing bolts. The first fixed frame is located on top of the second fixed frame, and the plurality of first fixing bolts all pass through the top of the first fixed frame. The plurality of fixing bolts are threadedly connected to the mounting holes of the third fixed frame, and a coarse filter module is fixedly connected to the bottom of the first fixed frame.

[0015] Preferably, the cleaning device includes a water tank, an annular backwash nozzle, and a pressure regulating valve. The annular backwash nozzle is fixedly connected to the inside of the filter body. The pressure regulating valve is installed on the right side of the filter body, and its output port is fixedly connected to the input port of the annular backwash nozzle. A water pump is installed on the top of the water tank, and its output port is connected to the input port of the pressure regulating valve via a flexible hose. A water level detector is installed on the right side of the water tank.

[0016] Preferably, the fixing device includes a clamp and a sealing cover, the sealing cover is rotatably connected to the top of the filter body, the clamp is fixedly connected to the inside of the filter body, and the rubber block is engaged with the clamp.

[0017] In summary, this application includes at least one of the following beneficial technical effects: 1. Three-stage filtration works synergistically, resulting in high separation accuracy and excellent anti-clogging effect. The coarse filter module of the third filtration unit first filters out larger impurities in the reaction solution, preventing large particles from clogging subsequent filter media. The fine filter module of the second filtration unit precisely traps catalyst particles, achieving separation of the catalyst from the reaction solution. The purification filter module of the first filtration unit performs deep filtration on the separated reaction solution, ensuring the purity of the output solution. This three-stage filtration system progressively intercepts contaminants of different particle sizes, effectively reducing the probability of filter clogging.

[0018] 2. Thorough catalyst recovery and high resource utilization rate. Catalyst particles trapped by the fine filtration membrane module are collected in a funnel under gravity. A one-way valve prevents catalyst backflow, ensuring that the catalyst falls stably into the catalyst recovery frame. The annular backwash nozzle of the cleaning device effectively washes away fine catalyst particles adhering to the surface of the fine filtration membrane module, preventing catalyst residue and significantly reducing production costs and resource waste.

[0019] 3. Automatic backwashing cleaning, convenient maintenance and no interruption of production. The cleaning device draws cleaning fluid from the water tank using a water pump. After the pressure is regulated by a pressure regulating valve, high-pressure flushing fluid is sprayed onto the fine filter membrane module through an annular backwash nozzle, achieving automatic cleaning of the filter screen. This eliminates the need to disassemble the filter mechanism and allows for online cleaning during production breaks or continuous operation, shortening cleaning time and avoiding the tedious operation and production interruptions caused by manual disassembly, thus reducing maintenance costs.

[0020] 4. Multiple fixed seals ensure stable and reliable structure. The clamps of the fixing device engage with the rubber blocks of the third fixing frame to ensure the first filter mechanism is firmly fixed. The first fixing frame is threadedly connected to the third fixing frame via multiple fixing bolts, enhancing the connection stability between the third and first filter mechanisms. The rubber seals within the grooves of the third fixing frame ensure a tight seal between the second and third fixing frames, preventing filtration leakage. This multi-layered fixing and sealing structure allows each filter mechanism to remain stable under high pressure and vibration conditions, exhibiting excellent sealing performance and eliminating filtration leakage.

[0021] 5. The structure is reasonably designed and has wide applicability. Each filtration unit adopts a modular design and is assembled using detachable connections such as bolts and snap-fit ​​mechanisms. This allows for easy replacement of individual filter media modules without the need for overall replacement, reducing operating costs. The catalyst recovery frame is snap-fitted to a one-way valve for quick and easy removal of the recovered catalyst. A water level detector monitors the tank level in real time, promptly reminding users to replenish the cleaning fluid to ensure stable operation of the cleaning device. This component is suitable for catalyst recovery filtration scenarios in various fields such as chemical, pharmaceutical, and environmental protection, and can be adapted to catalysts and reaction liquid systems with different particle sizes.

[0022] This invention not only effectively overcomes the defects of existing technologies such as filter clogging, incomplete recovery, inconvenient maintenance, and unstable fixation, but also provides a new type of catalyst recovery filter assembly with precise separation, high recovery efficiency, convenient maintenance, and stable reliability through an innovative combination of "three-stage filtration + automatic backwashing + multiple fixation" structure. It provides a reliable guarantee for catalyst recovery and reaction liquid purification in industrial production and has high practical value and promising prospects for promotion. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure in Embodiment 1 of this application; Figure 2 This is a schematic diagram of the connection structure of the first filtration mechanism, the second filtration mechanism, the third filtration mechanism, and the catalyst recovery mechanism in Embodiment 1 of this application; Figure 3 This is a schematic diagram of the internal structure of the filtration device body in Embodiment 1 of this application; Figure 4 This is a schematic diagram of the second filtering mechanism in Embodiment 1 of this application; Figure 5 This is a schematic diagram of the first filtering mechanism in Embodiment 1 of this application.

[0024] Reference numerals: 1. Sealing cap; 2. Filter device body; 3. First fixed frame; 4. Fixing bolt; 5. Coarse filter module; 6. Fine filter membrane module; 7. Funnel; 8. One-way valve; 9. Catalyst recovery frame; 10. Purification filter module; 11. Clamp; 12. Annular backwash nozzle; 13. Pressure stabilizing valve; 14. Water pump; 15. Water tank; 16. Second fixed frame; 17. Rubber seal; 18. Rubber clamp; 19. Third fixed frame; 20. Water level detector. Detailed Implementation

[0025] Example 1 The following is in conjunction with the appendix Figures 1-5 The first embodiment of this application will be described in further detail.

[0026] A catalyst recovery filtration assembly includes: a filtration device body 2; The first filtration mechanism is located inside the main body 2 of the filtration device and is used to filter the reaction liquid; The second filtration mechanism, located inside the first filtration mechanism, is used to filter the catalyst; A catalyst recovery mechanism, located at the bottom of the second filtration mechanism, is used to recover the catalyst; The third filtration mechanism, located inside the second filtration mechanism, is used to filter impurities. A cleaning device is located inside the filter body 2 and is used to clean the catalyst of the second filtration mechanism. A fixing device is provided on the inner wall of the filter equipment body 2, and is used to fix the first filter mechanism, the second filter mechanism, the catalyst recovery mechanism and the third filter mechanism inside the fixing tank. The filter body 2 is made of stainless steel with a wall thickness of 8mm, an inner diameter of 50cm, and a height of 80cm. The surface is treated with anti-corrosion coating.

[0027] In this embodiment, the first filtration mechanism includes a third fixed frame 19, a purification filter module 10 is fixedly connected to the bottom of the third fixed frame 19, and a rubber clip 18 is fixedly connected to the bottom of the third fixed frame 19. Specifically, the third fixed frame 19 of the first filtration mechanism is made of stainless steel, has a ring structure, an outer diameter of 48cm, an inner diameter of 38cm, and a thickness of 3cm; the purification filter module 10 is a polytetrafluoroethylene filter with a pore size of 1μm, used for deep filtration of fine impurities in the reaction liquid.

[0028] In this embodiment, the second filtration mechanism includes a fine filter membrane module 6, a rubber seal 17 is embedded in the groove of the third fixing frame 19, the second fixing frame 16 is sleeved inside the rubber seal 17, and the bottom of the second fixing frame 16 is fixedly connected to the fine filter membrane module 6. Specifically, the first fixed frame 3 of the third filtration mechanism is made of aluminum alloy, has a ring structure, an outer diameter of 45cm, an inner diameter of 35cm, and a thickness of 2cm; the fixing bolts 4 are M12 high-strength bolts, four in number, and are evenly distributed on the edge of the first fixed frame 3; the coarse filter module 5 is a stainless steel filter with a pore size of 50μm and a mesh size of 300, and is fixedly connected to the first fixed frame 3 by welding, for intercepting large particulate impurities.

[0029] In this embodiment, the catalyst recovery mechanism includes a one-way valve 8 and a catalyst recovery frame 9. A funnel 7 is fixedly connected to the bottom of the fine filtration membrane module 6. The one-way valve 8 is installed at the bottom of the funnel 7. The inlet of the catalyst recovery frame 9 is engaged with the outlet of the one-way valve 8. Specifically, the funnel 7 of the catalyst recovery mechanism is made of stainless steel, with an upper diameter of 35cm, a lower diameter of 5cm, and a height of 15cm, and is welded to the bottom of the fine filtration membrane module 6; the one-way valve 8 is a stainless steel ball valve with a diameter of DN50 and an opening pressure of 0.05MPa to prevent catalyst backflow.

[0030] In this embodiment, the third filtration mechanism includes a first fixed frame 3 and a plurality of fixing bolts 4. The first fixed frame 3 is located on top of the second fixed frame 16. The plurality of first fixing bolts 4 all penetrate the top of the first fixed frame 3. The plurality of fixing bolts 4 are threadedly connected to the mounting holes of the third fixed frame 19. A coarse filter module 5 is fixedly connected to the bottom of the first fixed frame 3. Specifically, the first fixed frame 3 of the third filtration mechanism is made of aluminum alloy, has a ring structure, an outer diameter of 45cm, an inner diameter of 35cm, and a thickness of 2cm; the fixing bolts 4 are M12 high-strength bolts, four in number, and are evenly distributed on the edge of the first fixed frame 3; the coarse filter module 5 is a stainless steel filter with a pore size of 50μm and a mesh size of 300, and is fixedly connected to the first fixed frame 3 by welding, for intercepting large particulate impurities.

[0031] In this embodiment, the cleaning device includes a water tank 15, an annular backwash nozzle 12, and a pressure regulating valve 13. The annular backwash nozzle 12 is fixedly connected to the inside of the filter equipment body 2. The pressure regulating valve 13 is installed on the right side of the filter equipment body 2. The output port of the pressure regulating valve 13 is fixedly connected to the input port of the annular backwash nozzle 12. A water pump 14 is installed on the top of the water tank 15. The output port of the water pump 14 is connected to the input port hose of the pressure regulating valve 13. A water level detector 20 is installed on the right side of the water tank 15. Specifically, the water tank 15 of the cleaning device is made of polyethylene, with a volume of 20L, and is installed on the outside of the filter equipment body 2; the water level detector 20 is a capacitive liquid level sensor with a measurement range of 0-20L and an accuracy of ±0.1L, which monitors the liquid level in the water tank in real time; the water pump 14 is a corrosion-resistant centrifugal pump with a flow rate of 10L / min, a head of 8m, and a rated power of 0.37kW; the pressure regulating valve 13 is a pilot-operated pressure regulating valve with an adjustment range of 0.1-0.5MPa and a pressure regulating accuracy of ±0.01MPa; the annular backwash nozzle 12 is made of stainless steel, with an annular diameter of 30cm, and is equipped with 16 nozzles with an orifice diameter of 1mm. The 16 nozzles are tilted at an angle of 60 degrees and are installed inside the top of the filter equipment body 2, aligned with the fine filter membrane module 6.

[0032] In this embodiment, the fixing device includes a clamp 11 and a sealing cover 1. The sealing cover 1 is rotatably connected to the top of the filter device body 2, and the clamp 11 is fixedly connected to the inside of the filter device body 2. The rubber block 18 is engaged with the clamp 11. Specifically, a sealing cover 1 is provided on the top to ensure airtightness during operation; the sealing cover 1 is made of stainless steel and is rotatably connected to the filter body 2 via a hinge. After closing, it is locked by a buckle to prevent leakage.

[0033] The implementation principle of a catalyst recovery filtration component in this application is as follows: 1. Before use, check whether the connections of each mechanism are secure, add sufficient cleaning solution to the water tank 15, and confirm that the liquid level is normal through the water level detector 20; lock and fix the catalyst recovery frame 9 to the output port of the one-way valve 8, and close and lock the sealing cover 1. 2. Start the equipment. The reaction solution is injected from the top inlet of the filter body 2. It first flows through the coarse filter module 5 of the third filtration mechanism. Large particles with a diameter ≥50μm are intercepted to prevent clogging of subsequent filter media. The filtered reaction solution enters the fine filter membrane module 6 of the second filtration mechanism. The catalyst particles with a diameter of 1-10μm are usually intercepted by the fine filter membrane, and the reaction solution continues to permeate downward. Then the reaction solution flows through the purification filter module 10 of the first filtration mechanism. Fine impurities with a diameter ≥1μm are deeply filtered. The purified reaction solution is discharged from the bottom outlet of the filter body 2. 3. The catalyst particles trapped by the fine filtration membrane module 6 are collected at the bottom of the funnel 7 under the action of gravity. When the amount of catalyst accumulation reaches a certain level, the one-way valve 8 is automatically opened under the action of gravity and reaction liquid pressure, and the catalyst falls into the catalyst recovery frame 9 to realize the automatic recovery of the catalyst. The one-way valve 8 can prevent the reaction liquid or catalyst from flowing back and ensure the recovery effect. 4. During the filtration process, the backwashing cycle can be set via the control panel to 30-60 minutes / time. When the set time is reached, the equipment will automatically start the cleaning device: the water pump 14 draws the cleaning liquid from the water tank 15, adjusts it to the set pressure of 0.3MPa via the pressure regulator 13, and delivers it to the annular backwash nozzle 12; the annular backwash nozzle 12 sprays high-pressure flushing liquid onto the fine filter membrane module 6, flushing the catalyst particles attached to the filter membrane surface from all directions. The flushed catalyst flows into the funnel 7 along with the flushing liquid, and finally enters the catalyst recovery frame 9, which can separate the clean water and the catalyst. 5. During the backwashing process, the water level detector 20 monitors the water level in the water tank 15 in real time. When the water level is lower than the set lower limit of 5L, the equipment will issue an alarm to remind you to add cleaning solution. After the backwashing is completed, the water pump 14 stops working, the one-way valve 8 closes, and the equipment returns to the filtration state. 6. When the catalyst recovery frame 9 is full, the equipment can be turned off, the sealing cover 1 can be opened, the catalyst recovery frame 9 and the connected parts can be removed, the recovered catalyst can be poured out, and after cleaning, it can be reinstalled.

[0034] Example 2 The difference between this embodiment and Embodiment 1 is that a pretreatment filter module is added between the coarse filter module 5 and the fine filter membrane module 6. The pretreatment filter is a nylon filter with a pore size of 20μm, which further intercepts medium-sized impurities, reduces the filtration load on the fine filter membrane module 6, and extends the service life of the fine filter membrane.

[0035] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A catalyst recovery filtration assembly, comprising: The filter device body (2) is characterized by: The first filtration mechanism is located inside the filter body (2) and is used to filter the reaction liquid; The second filtration mechanism, located inside the first filtration mechanism, is used to filter the catalyst; A catalyst recovery mechanism, located at the bottom of the second filtration mechanism, is used to recover the catalyst; The third filtration mechanism, located inside the second filtration mechanism, is used to filter impurities. The cleaning device is located inside the filter body (2) and is used to clean the catalyst of the second filter mechanism. A fixing device is provided on the inner wall of the filter equipment body (2) for fixing the first filter mechanism, the second filter mechanism, the catalyst recovery mechanism and the third filter mechanism inside the fixing tank.

2. The catalyst recovery filtration assembly according to claim 1, characterized in that: The first filtration mechanism includes a third fixed frame (19), a purification filter module (10) is fixedly connected to the bottom of the third fixed frame (19), and a rubber clip (18) is fixedly connected to the bottom of the third fixed frame (19).

3. The catalyst recovery filtration assembly according to claim 2, characterized in that: The second filtration mechanism includes a fine filter membrane module (6), a rubber seal (17) is embedded in the groove of the third fixed frame (19), and a second fixed frame (16) is sleeved inside the rubber seal (17). The bottom of the second fixed frame (16) is fixedly connected to the fine filter membrane module (6).

4. The catalyst recovery filtration assembly according to claim 3, characterized in that: The catalyst recovery mechanism includes a one-way valve (8) and a catalyst recovery frame (9). A funnel (7) is fixedly connected to the bottom of the fine filtration membrane module (6). The one-way valve (8) is installed at the bottom of the funnel (7). The inlet of the catalyst recovery frame (9) is engaged with the outlet of the one-way valve (8).

5. A catalyst recovery filtration assembly according to claim 4, characterized in that: The third filtration mechanism includes a first fixed frame (3) and multiple fixing bolts (4). The first fixed frame (3) is located on the top of the second fixed frame (16). The multiple first fixing bolts (4) all penetrate the top of the first fixed frame (3). The multiple fixing bolts (4) are threadedly connected to the mounting holes of the third fixed frame (19). A coarse filter module (5) is fixedly connected to the bottom of the first fixed frame (3).

6. The catalyst recovery filtration assembly according to claim 5, characterized in that: The cleaning device includes a water tank (15), an annular backwash nozzle (12), and a pressure regulating valve (13). The annular backwash nozzle (12) is fixedly connected to the inside of the filter body (2). The pressure regulating valve (13) is installed on the right side of the filter body (2). The output port of the pressure regulating valve (13) is fixedly connected to the input port of the annular backwash nozzle (12). A water pump (14) is installed on the top of the water tank (15). The output port of the water pump (14) is connected to the input port of the pressure regulating valve (13) via a hose. A water level detector (20) is installed on the right side of the water tank (15).

7. A catalyst recovery filtration assembly according to claim 6, characterized in that: The fixing device includes a clamp (11) and a sealing cover (1). The sealing cover (1) is rotatably connected to the top of the filter body (2). The clamp (11) is fixedly connected to the inside of the filter body (2). The rubber block (18) is engaged with the clamp (11).

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