Nitrogen protection closed cycle multi-stage filtering dryer
By introducing a condensation mechanism and cleaning components into a nitrogen-protected closed-loop multi-stage filter dryer, the problems of water vapor condensation and filter plate dampness during nitrogen circulation are solved, achieving efficient drying, reducing maintenance frequency, and improving production efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIANGYIN JIANHUA DRYING EQUIP CO LTD
- Filing Date
- 2025-05-27
- Publication Date
- 2026-05-15
AI Technical Summary
In existing nitrogen-protected closed-loop drying systems, water vapor in the nitrogen may recondense during the circulation process, affecting drying efficiency. Filter plates may become damp, and dust or volatile substances may adhere to the filter screen, reducing gas flow efficiency and increasing energy consumption.
A nitrogen-protected closed-loop multi-stage filtration dryer was designed, comprising a condensation mechanism, a cleaning component, and a disassembly mechanism. It removes water vapor from nitrogen through condensation, cleans impurities on the filter screen surface using a vertical scraper, and allows for the disassembly of the filter screen for maintenance and replacement.
It improved the quality of nitrogen drying, reduced filter plate clogging, lowered maintenance frequency, shortened downtime, and increased production efficiency.
Smart Images
Figure CN224236484U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of dryer technology, specifically relating to a nitrogen-protected closed-loop multi-stage filtration dryer. Background Technology
[0002] Nitrogen-protected closed-loop dryers are a type of drying equipment widely used in chemical, pharmaceutical, food, and new energy materials industries. Their main feature is that drying is carried out in an inert nitrogen environment to avoid oxidation, decomposition, or combustion of materials. Existing closed-loop drying systems typically include a nitrogen supply unit, a heating and drying chamber, a condensation recovery device, and a gas circulation system.
[0003] Water vapor in nitrogen may recondense during the circulation process, affecting drying efficiency and even causing the filter plate to become damp. During filtration, some dust or volatile substances may adhere to the filter screen, reducing gas flow efficiency and increasing energy consumption. To address these issues, we have designed a nitrogen-protected closed-loop multi-stage filtration dryer to provide an alternative technical solution. Utility Model Content
[0004] The purpose of this invention is to provide a nitrogen-protected closed-loop multi-stage filtration dryer to solve the problems mentioned in the background section regarding the use of existing technologies.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a nitrogen-protected closed-loop multi-stage filtration dryer, including a gas supply pipe, a first filter box at one end of the gas supply pipe, a second filter box at one end of the first filter box, and a condensation mechanism inside the first filter box.
[0006] The second filter box has a side baffle at one end, and horizontal connecting plates are fixed on both sides of the side baffle near the end of the second filter box. The horizontal connecting plates are slidably connected to the second filter box. A stainless steel filter screen is provided at one end between the two horizontal connecting plates. Multiple rectangular filter plates are also provided inside the two horizontal connecting plates. A cleaning component for cleaning the surface of the stainless steel filter screen is provided inside the second filter box. A disassembly mechanism for disassembling the side baffle is also provided on the outside of the second filter box.
[0007] Preferably, the condensation mechanism includes multiple U-shaped ventilation pipes, and multiple U-shaped ventilation pipes are evenly distributed inside the first filter box. A rectangular air box is provided at one end of the top of the U-shaped ventilation pipe, and multiple fans are evenly distributed at the top of the inside of the rectangular air box.
[0008] Preferably, multiple heat dissipation fins are evenly distributed on the outer side of the U-shaped ventilation duct, and a drain pipe is provided at the bottom of the first filter box.
[0009] Preferably, the cleaning assembly includes a drive motor, which is bolted to the inside of the second filter box. A longitudinal threaded rod is fixed to the output end of the drive motor, and a longitudinal sliding block is threaded to the outer side of the longitudinal threaded rod. A vertical scraper is fixed to the bottom of the longitudinal sliding block.
[0010] Preferably, the interior of the second filter box is provided with a rectangular sliding groove, and the longitudinal sliding block is located inside the rectangular sliding groove and is slidably connected to the second filter box through the rectangular sliding groove.
[0011] Preferably, the disassembly mechanism includes a U-shaped push plate. The first filter box is located outside the second filter box and is slidably connected to the second filter box. Both ends of the first filter box are slidably connected to a transverse light rod. Both ends of the transverse light rod are fixed with an arc-shaped fixing block. The bottom of the arc-shaped fixing block is fixedly connected to the second filter box. A transverse rigid spring is provided between the arc-shaped fixing block and the U-shaped push plate and outside the transverse light rod. One end of the bottom of the U-shaped push plate is rotatably connected to an oblique rotating column via a pin. One end of the oblique rotating column is rotatably connected to a rectangular limiting column via a pin. The rectangular limiting column is located inside the second filter box and is slidably connected to the second filter box.
[0012] Preferably, the second filter box has a circular through hole inside, and the rectangular limiting post is located inside the circular through hole and is slidably connected to the second filter box through the circular through hole.
[0013] Preferably, a rectangular mounting block is provided at one end of the side baffle near the second filter box, and a circular limiting hole is provided inside the rectangular mounting block to fit the rectangular limiting post.
[0014] Compared with the prior art, the beneficial effects of this utility model are:
[0015] This invention removes water vapor from nitrogen through a condensation mechanism, preventing the stainless steel filter screen and rectangular filter plate from getting damp and improving the quality of nitrogen drying. The vertical scraper can clean impurities from the surface of the stainless steel filter screen, reducing clogging and maintenance frequency. The disassembly mechanism allows the stainless steel filter screen and rectangular filter plate to be disassembled for easy maintenance and replacement, shortening downtime and improving production efficiency. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0017] Figure 2 This is a schematic diagram of the structure of the second filter box and the side baffle of this utility model;
[0018] Figure 3This is a schematic diagram of the internal structure of the first filter box of this utility model;
[0019] Figure 4 This is a schematic diagram of the internal structure of the second filter box of this utility model;
[0020] Figure 5 This is a schematic diagram of the structure of the transverse connecting plate and the stainless steel filter screen of this utility model;
[0021] Figure 6 This is a schematic diagram of the drive motor and longitudinal threaded rod of this utility model;
[0022] Figure 7 This is a structural schematic diagram of the rectangular limiting post and rectangular mounting block of this utility model.
[0023] In the diagram: 1. Gas supply pipe; 2. First filter box; 3. Second filter box; 4. Side baffle; 5. Rectangular air box; 6. U-shaped ventilation pipe; 7. Fan; 8. Horizontal connecting plate; 9. Stainless steel filter screen; 10. Rectangular filter plate; 11. Vertical scraper; 12. Drive motor; 13. Longitudinal threaded rod; 14. Longitudinal sliding block; 15. Rectangular mounting block; 16. Horizontal smooth rod; 17. Horizontal rigid spring; 18. Angled rotating column; 19. Rectangular limiting column; 20. U-shaped push plate; 21. Arc-shaped fixing block. Detailed Implementation
[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0025] Reference Figure 1-7 A nitrogen-protected closed-loop multi-stage filtration dryer includes a gas supply pipe 1, a first filter box 2 at one end of the gas supply pipe 1, a second filter box 3 at one end of the first filter box 2, and a condensation mechanism inside the first filter box 2.
[0026] A side baffle 4 is provided at one end of the second filter box 3. A transverse connecting plate 8 is fixed on both sides of the side baffle 4 near the end of the second filter box 3. The transverse connecting plate 8 is slidably connected to the second filter box 3. A stainless steel filter screen 9 is provided at one end between the two transverse connecting plates 8. Multiple rectangular filter plates 10 are also provided inside the two transverse connecting plates 8. A cleaning component for cleaning the surface of the stainless steel filter screen 9 is provided inside the second filter box 3. A disassembly mechanism for disassembling the side baffle 4 is also provided on the outside of the second filter box 3.
[0027] The condensation mechanism includes multiple U-shaped ventilation pipes 6. Multiple U-shaped ventilation pipes 6 are evenly distributed inside the first filter box 2. A rectangular air box 5 is provided at one end of the top of the U-shaped ventilation pipe 6. Multiple fans 7 are evenly distributed at the top of the rectangular air box 5.
[0028] Multiple heat dissipation fins are evenly distributed on the outer side of the U-shaped ventilation pipe 6, and a drain pipe is provided at the bottom of the first filter box 2 for discharging the liquid inside the first filter box 2.
[0029] Here, the operation of the gas supply pipe 1 allows nitrogen to enter the interior of the first filter box 2, the operation of the fan 7 allows outside air to enter the interior of the rectangular air box 5, the setting of the U-shaped ventilation pipe 6 allows air to pass through the interior of the U-shaped ventilation pipe 6 and be discharged to the outside, and the setting of the heat dissipation fins allows the high temperature nitrogen to condense on the outside of the heat dissipation fins and the U-shaped ventilation pipe 6, thereby reducing the moisture inside the nitrogen and filtering out the moisture inside the nitrogen.
[0030] The cleaning assembly includes a drive motor 12, which is bolted to the inside of the second filter box 3. A longitudinal threaded rod 13 is fixed to the output end of the drive motor 12. A longitudinal sliding block 14 is threaded to the outer side of the longitudinal threaded rod 13. A vertical scraper 11 is fixed to the bottom of the longitudinal sliding block 14.
[0031] The second filter box 3 has a rectangular sliding groove inside. The longitudinal sliding block 14 is located inside the rectangular sliding groove and is slidably connected to the second filter box 3 through the rectangular sliding groove. With the setting of the rectangular sliding groove, the longitudinal sliding block 14 can move inside the second filter box 3. The movement of the longitudinal sliding block 14 enables the vertical scraper 11 to move so that the vertical scraper 11 can clean the surface of the stainless steel filter screen 9.
[0032] Here, the operation of the drive motor 12 causes the longitudinal threaded rod 13 to rotate. The rotation of the longitudinal threaded rod 13 causes the longitudinal sliding block 14 to move inside the second filter box 3. The movement of the longitudinal sliding block 14 causes the vertical scraper 11 to move, thereby enabling the vertical scraper 11 to clean the surface of the stainless steel filter screen 9 and prevent the surface of the stainless steel filter screen 9 from becoming clogged.
[0033] The disassembly mechanism includes a U-shaped push plate 20. The first filter box 2 is located outside the second filter box 3 and is slidably connected to the second filter box 3. Both ends of the first filter box 2 are slidably connected to a transverse smooth rod 16. Both ends of the transverse smooth rod 16 are fixed with an arc-shaped fixing block 21. The bottom of the arc-shaped fixing block 21 is fixedly connected to the second filter box 3. A transverse rigid spring 17 is provided between the arc-shaped fixing block 21 and the U-shaped push plate 20 and outside the transverse smooth rod 16. One end of the bottom of the U-shaped push plate 20 is rotatably connected to an oblique rotating column 18 through a pin. One end of the oblique rotating column 18 is rotatably connected to a rectangular limiting column 19 through a pin. The rectangular limiting column 19 is located inside the second filter box 3 and is slidably connected to the second filter box 3.
[0034] The second filter box 3 has a circular through hole inside. The rectangular limiting post 19 is located inside the circular through hole and is slidably connected to the second filter box 3 through the circular through hole. The circular through hole allows the rectangular limiting post 19 to move inside the second filter box 3.
[0035] A rectangular mounting block 15 is provided at one end of the side baffle 4 near the second filter box 3. The rectangular mounting block 15 has a circular limiting hole that fits with the rectangular limiting post 19. The circular limiting hole allows the rectangular limiting post 19 to enter the rectangular mounting block 15, thereby limiting the displacement of the side baffle 4. When the rectangular limiting post 19 moves out of the rectangular mounting block 15, the rectangular mounting block 15 can move inside the side baffle 4, thereby allowing the side baffle 4 to be disassembled.
[0036] Here, the U-shaped push plate 20 is pushed towards the side baffle 4, so that the U-shaped push plate 20 can slide on the outside of the transverse rigid spring 17. The sliding of the U-shaped push plate 20 causes the transverse rigid spring 17 to deform under force. The movement of the U-shaped push plate 20 causes the oblique rotating column 18 to move. The movement of the oblique rotating column 18 causes the rectangular limiting column 19 to move inside the second filter box 3, thereby allowing the rectangular limiting column 19 to move out of the interior of the rectangular mounting block 15, so that the rectangular mounting block 15 can be disassembled. The disassembly of the rectangular mounting block 15 allows the side baffle 4 and the transverse connecting plate 8 to be disassembled, so that the stainless steel filter screen 9 and the rectangular filter plate 10 between the two transverse connecting plates 8 can be replaced and maintained in a timely manner.
[0037] The condensation mechanism removes water vapor from the nitrogen, preventing the stainless steel filter screen 9 and rectangular filter plate 10 from getting damp and improving the nitrogen drying quality. The vertical scraper 11 can clean impurities from the surface of the stainless steel filter screen 9, reducing clogging and maintenance frequency. The disassembly mechanism allows the stainless steel filter screen 9 and rectangular filter plate 10 to be disassembled for maintenance and replacement, shortening downtime and improving production efficiency.
[0038] Working principle: Nitrogen gas enters the first filter box 2 through the operation of the gas supply pipe 1. The operation of the fan 7 allows outside air to enter the rectangular air box 5. The U-shaped ventilation pipe 6 allows air to pass through the inside of the U-shaped ventilation pipe 6 and be discharged to the outside. The heat dissipation fins allow the high temperature nitrogen gas to condense on the outside of the heat dissipation fins and the U-shaped ventilation pipe 6, thereby reducing the moisture inside the nitrogen gas and filtering out the moisture inside the nitrogen gas.
[0039] The operation of the drive motor 12 enables the longitudinal threaded rod 13 to rotate. The rotation of the longitudinal threaded rod 13 enables the longitudinal sliding block 14 to move inside the second filter box 3. The movement of the longitudinal sliding block 14 enables the vertical scraper 11 to move, thereby enabling the vertical scraper 11 to clean the surface of the stainless steel filter screen 9 and prevent the surface of the stainless steel filter screen 9 from becoming clogged.
[0040] Pushing the U-shaped push plate 20 towards the side baffle 4 allows it to slide outside the transverse rigid spring 17. The sliding of the U-shaped push plate 20 causes the transverse rigid spring 17 to deform under force. The movement of the U-shaped push plate 20 allows the oblique rotating column 18 to move. The movement of the oblique rotating column 18 allows the rectangular limiting column 19 to move inside the second filter box 3, thereby allowing the rectangular limiting column 19 to move out of the rectangular mounting block 15. This allows the rectangular mounting block 15 to be disassembled. The disassembly of the rectangular mounting block 15 allows the side baffle 4 and the transverse connecting plate 8 to be disassembled, so that the stainless steel filter screen 9 and the rectangular filter plate 10 between the two transverse connecting plates 8 can be replaced and maintained in a timely manner.
[0041] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A nitrogen-protected closed-loop multi-stage filtration dryer, characterized in that: It includes a gas supply pipe (1), one end of which is provided with a first filter box (2), one end of which is provided with a second filter box (3), and the interior of the first filter box (2) is provided with a condensation mechanism. A side baffle (4) is provided at one end of the second filter box (3). A transverse connecting plate (8) is fixed on both sides of the side baffle (4) near the end of the second filter box (3). The transverse connecting plate (8) is slidably connected to the second filter box (3). A stainless steel filter screen (9) is provided at one end between the two transverse connecting plates (8). A plurality of rectangular filter plates (10) are also provided inside the two transverse connecting plates (8). A cleaning component for cleaning the surface of the stainless steel filter screen (9) is provided inside the second filter box (3). A disassembly mechanism for disassembling the side baffle (4) is also provided on the outside of the second filter box (3).
2. The nitrogen-protected closed-loop multi-stage filtration dryer according to claim 1, characterized in that: The condensation mechanism includes multiple U-shaped ventilation pipes (6). Multiple U-shaped ventilation pipes (6) are evenly distributed inside the first filter box (2). A rectangular air box (5) is provided at one end of the top of the U-shaped ventilation pipe (6). Multiple fans (7) are evenly distributed at the top of the rectangular air box (5).
3. The nitrogen-protected closed-loop multi-stage filtration dryer according to claim 2, characterized in that: Multiple heat dissipation fins are evenly distributed on the outer side of the U-shaped ventilation pipe (6), and a drain pipe is provided at the bottom of the first filter box (2).
4. The nitrogen-protected closed-loop multi-stage filtration dryer according to claim 1, characterized in that: The cleaning assembly includes a drive motor (12), which is bolted to the inside of the second filter box (3). The output end of the drive motor (12) is fixed with a longitudinal threaded rod (13), and a longitudinal sliding block (14) is threaded to the outer side of the longitudinal threaded rod (13). A vertical scraper (11) is fixed to the bottom of the longitudinal sliding block (14).
5. A nitrogen-protected closed-loop multi-stage filtration dryer according to claim 4, characterized in that: The second filter box (3) has a rectangular sliding groove inside, and the longitudinal sliding block (14) is located inside the rectangular sliding groove and is slidably connected to the second filter box (3) through the rectangular sliding groove.
6. The nitrogen-protected closed-loop multi-stage filtration dryer according to claim 1, characterized in that: The disassembly mechanism includes a U-shaped push plate (20). The first filter box (2) is located outside the second filter box (3) and is slidably connected to the second filter box (3). Both ends of the first filter box (2) are slidably connected to a transverse light rod (16). Both ends of the transverse light rod (16) are fixed with an arc-shaped fixing block (21). The bottom of the arc-shaped fixing block (21) is fixedly connected to the second filter box (3). A transverse rigid spring (17) is provided between the arc-shaped fixing block (21) and the U-shaped push plate (20) and outside the transverse light rod (16). One end of the bottom of the U-shaped push plate (20) is rotatably connected to an oblique rotating column (18) through a pin. One end of the oblique rotating column (18) is rotatably connected to a rectangular limiting column (19) through a pin. The rectangular limiting column (19) is located inside the second filter box (3) and is slidably connected to the second filter box (3).
7. A nitrogen-protected closed-loop multi-stage filtration dryer according to claim 6, characterized in that: The second filter box (3) has a circular through hole inside, and the rectangular limiting post (19) is located inside the circular through hole and is slidably connected to the second filter box (3) through the circular through hole.
8. A nitrogen-protected closed-loop multi-stage filtration dryer according to claim 6, characterized in that: A rectangular mounting block (15) is provided at one end of the side baffle (4) near the second filter box (3). The rectangular mounting block (15) has a circular limiting hole that fits with the rectangular limiting post (19) with a clearance.