Waste heat recovery type membrane separation nitrogen generation system
By designing crude filters in the waste heat recovery membrane separation nitrogen production system, including components such as filter cartridges, scrapers and tooth plates, the problems of clogging and cumbersome operation in the existing system are solved, efficient preliminary filtration of air and automatic scraping of impurities are achieved, and the service life of the equipment is extended.
Patent Information
- Application Number
- CN202421900957.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-07
- Publication Date
- 2025-05-16
- Estimated Expiration
- 2034-08-07
AI Technical Summary
In the existing waste heat recovery membrane separation and nitrogen production system, the filter element or filter membrane is easily blocked after use for a period of time, resulting in the inability to pass through the air, affecting the preparation of nitrogen, and requires regular disassembly and assembly and replacement, which is cumbersome.
A waste heat recovery membrane separation nitrogen production system including a coarse filter is designed. The coarse filter is equipped with components such as filter cartridges, scrapers and tooth plates. Through structures such as vortex shells, wind wheels and worms, preliminary air filtration and automatic scraping of impurities are achieved to avoid clogging of the filter cartridge.
Effectively remove most impurities in the air, reduce the working pressure of subsequent fine filters, extend the service life and replacement interval of the filter element and filter membrane in the fine filter, simplify the operation process, and avoid the filter cartridge blockage.
Smart Images
Figure CN222871674U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of nitrogen preparation, in particular to a waste heat recovery type membrane separation nitrogen production system. Background Art
[0002] Nitrogen is the gas with the highest content in the air. It is usually used as a protective gas, to make refrigerants, to make ammonia, etc. It is widely used. There are three main methods of preparing nitrogen, namely liquid air fractionation, cryogenic separation and membrane separation.
[0003] Membrane separation refers to the assembly of thousands of hollow fiber separation membranes in a shell. The structure is similar to a shell-and-tube heat exchanger. It uses the different permeation rates of various gases on polymer membranes to separate nitrogen. It can provide the largest separation membrane surface area in the smallest space, so the membrane separation system has the advantages of small footprint, light weight and high separation efficiency.
[0004] The existing waste heat recovery membrane separation nitrogen production system needs to filter the air, mainly the filter element or the filter membrane. After a period of use, the filter structure is blocked, so that the air cannot pass through, thus affecting the subsequent nitrogen preparation. Therefore, the filter element needs to be disassembled and replaced regularly, which is a cumbersome operation. Utility Model Content
[0005] Based on this, the purpose of the utility model is to provide a waste heat recovery membrane separation nitrogen production system to solve the technical problems mentioned in the above background technology.
[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a waste heat recovery membrane separation nitrogen production system, comprising a box body and a coarse filter, a filter cartridge is installed inside the coarse filter, a toothed disc is connected to the top of the coarse filter, and a scraper is fixed to the bottom of the toothed disc, a gear is connected to one side of the coarse filter, and a worm gear is connected to the top of the gear; a volute is connected to the top of the coarse filter, and a wind wheel is connected to the inside of the volute, and a worm is connected to one side of the wind wheel.
[0007] By adopting the above technical solution, large particles of impurities in the air are filtered through the filter cartridge, thereby removing most of the impurities in the air, effectively reducing the working pressure of subsequent fine filtration, thereby extending the service life and replacement interval of the filter element and filter membrane in the subsequent fine filter, and the airflow enters the volute when discharged from the coarse filter, and the airflow drives the wind wheel to rotate and then the scraper to rotate. After the scraper rotates, it scrapes the impurities on the surface of the filter cartridge and pushes it downward, which is convenient for continuous filtration and avoids clogging of the filter cartridge.
[0008] Furthermore, the filter cartridge is made of stainless steel or aluminum alloy.
[0009] By adopting the above technical solution, after the compressed air enters the coarse filter from the gas-liquid separator, the large-particle impurities in the air are filtered through the filter cartridge, thereby removing most of the impurities in the air.
[0010] Further, the scraper is spiral and contacts the filter cartridge.
[0011] By adopting the above technical solution, after the scraper rotates, the impurities on the surface of the filter cartridge are scraped off and pushed downward, facilitating continuous filtration and preventing the filter cartridge from being blocked.
[0012] Further, the cross-section of the toothed disk is in an inverted "r" shape, and the diameter of the toothed disk is larger than that of the gear.
[0013] By adopting the above technical solution, through the meshing of the gear and the toothed disk, and since the toothed disk is larger than the gear, a second deceleration and an increase in torque are formed, and then the toothed disk drives the scraper to rotate.
[0014] Further, the worm is meshed with the worm wheel, and the gear is meshed with the toothed disk.
[0015] By adopting the above technical solution, a first deceleration and an increase in torque are formed through the meshing of the worm and the worm wheel. After the worm wheel rotates, it drives the gear to rotate. Through the meshing of the gear and the toothed disk, and since the toothed disk is larger than the gear, a second deceleration and an increase in torque are formed.
[0016] Further, a compressor, an air aftercooler, a gas-liquid separator, a coarse filter, a fine filter, and a heat exchanger are respectively installed in the box body from left to right. A membrane tube is installed above the box body. Pipes are connected between the air aftercooler, the gas-liquid separator, the coarse filter, the volute, the fine filter, the heat exchanger, and the membrane tube.
[0017] By adopting the above technical solution, after the compressor is started, the air is compressed and the compressed air is sent into the air aftercooler for cooling. The cooled compressed air enters the gas-liquid separator through the pipe to separate the liquid droplets in the air. Then the dry compressed air passes through the coarse filter and the fine filter in sequence through the pipe, filtering out the large-particle impurities and small-particle impurities in the air respectively. Then the dry and clean compressed air enters the heat exchanger, and the compressed air is heated and raised in temperature by the high-temperature waste heat generated by external equipment. The heated compressed air enters the membrane tube to separate nitrogen from other air, and then the nitrogen and other air are discharged from two exhaust ports respectively.
[0018] Further, an air inlet is connected to one side of the compressor, and two exhaust ports are connected to one side of the membrane tube.
[0019] By adopting the above technical solution, air is input into the compressor through the air inlet. After the compressor is started, the air is compressed and sent to the air aftercooler for cooling. After the membrane tube separates the nitrogen from the other air, the nitrogen and the other air are discharged from the two exhaust ports respectively.
[0020] Furthermore, a collecting box is provided at the lower part of the coarse filter, and the collecting box is detachably connected to the coarse filter.
[0021] By adopting the above technical solution, the impurities scraped off and pushed downward by the scraper fall into the collection box. The staff only needs to pull out the collection box regularly to dump out the impurities. After dumping the impurities, the staff can directly insert the collection box back.
[0022] In summary, the utility model mainly has the following beneficial effects:
[0023] 1. The utility model filters large particles of impurities in the air through the filter cartridge through the arrangement of the volute, the wind wheel, the scraper and the filter cartridge, thereby removing most of the impurities in the air, effectively reducing the working pressure of the subsequent fine filter, thereby extending the service life and replacement interval of the filter element and filter membrane in the subsequent fine filter, and the airflow will enter the volute when discharged from the coarse filter, and the airflow will drive the wind wheel to rotate and then the scraper to rotate. After the scraper rotates, it will scrape the impurities on the surface of the filter cartridge and push it downward, which is convenient for continuous filtration and avoids clogging of the filter cartridge; the large particles of impurities in the air are filtered through the pre-coarse filter structure, thereby reducing the working pressure of the filter element and filter membrane in the subsequent fine filter, so as to extend the service life and replacement interval of the filter element and filter membrane;
[0024] 2. The utility model adopts the arrangement of a worm, a worm wheel, a gear and a toothed disk. After the wind wheel rotates, the worm is driven to rotate. The meshing of the worm and the worm wheel forms the first deceleration and increases the torque. After the worm wheel rotates, the gear is driven to rotate. The meshing of the gear and the toothed disk forms the second deceleration and increases the torque. The two decelerations make the rotation speed of the scraper very slow, thus avoiding large wear between the scraper and the filter cartridge. The torque is increased so that the airflow can more easily push the wind wheel to rotate, thus avoiding the phenomenon that the scraper forms large resistance and the airflow cannot push the wind wheel to rotate. Wear is reduced and stability is improved. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] Figure 1 It is a schematic diagram of the structure of the utility model;
[0026] Figure 2 This is a schematic diagram of the structure of the coarse filter of the utility model;
[0027] Figure 3 This is a schematic diagram of the cross-sectional structure of the coarse filter of the utility model;
[0028] Figure 4Schematic diagram of the scraper structure of the present utility model.
[0029] In the figure: 1, box body; 2, compressor; 3, air after-cooler; 4, gas-liquid separator; 5, coarse filter; 6, fine filter; 7, heat exchanger; 8, membrane tube; 9, collection box; 10, volute; 11, wind wheel; 12, worm; 13, worm gear; 14, gear; 15, toothed disc; 16, scraper; 17, filter cartridge. Specific implementation mode
[0030] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation to the present utility model.
[0031] Next, the embodiments of the present utility model will be described according to the overall structure of the present utility model.
[0032] Embodiment 1:
[0033] A waste heat recovery type membrane separation nitrogen production system, as Figure 1-Figure 4 shown, includes a box body 1 and a coarse filter 5. A filter cartridge 17 is installed inside the coarse filter 5. The filter cartridge 17 is made of stainless steel or aluminum alloy material. The large-particle impurities in the air are filtered through the filter cartridge 17, thereby removing most of the impurities in the air; a toothed disc 15 is connected above the inside of the coarse filter 5. The cross-section of the toothed disc 15 is in the shape of an inverted "r". The diameter of the toothed disc 15 is larger than the diameter of the gear 14. Since the toothed disc 15 is larger than the gear 14, a second deceleration and an increase in torque are formed; a scraper 16 is fixed at the bottom of the toothed disc 15. The scraper 16 is spiral-shaped. The scraper 16 is in contact with the filter cartridge 17. After the scraper 16 rotates, the impurities on the surface of the filter cartridge 17 are scraped off and pushed downward, which facilitates continuous filtration and avoids blockage of the filter cartridge 17; a gear 14 is connected to one side inside the coarse filter 5. The gear 14 meshes with the toothed disc 15. A worm gear 13 is connected to the top of the gear 14; a volute 10 is connected to the top of the coarse filter 5. A wind wheel 11 is connected inside the volute 10. A worm 12 is connected to one side of the wind wheel 11. The worm 12 meshes with the worm gear 13. After the wind wheel 11 rotates, it drives the worm 12 to rotate. The first deceleration and an increase in torque are formed through the meshing of the worm 12 and the worm gear 13.
[0034] Refer to Figure 1In the above embodiment, a compressor 2, an air aftercooler 3, a gas-liquid separator 4, a coarse filter 5, a fine filter 6 and a heat exchanger 7 are installed from left to right inside the compartment 1, and a membrane tube 8 is installed above the compartment 1. Pipes are connected between the air aftercooler 3, the gas-liquid separator 4, the coarse filter 5, the volute 10, the fine filter 6, the heat exchanger 7 and the membrane tube 8. One side of the compressor 2 is connected to an air inlet, and one side of the membrane tube 8 is connected to two exhaust ports. After the compressor 2 is started, the air is compressed and sent to the air aftercooler 3 for cooling. The cooled compressed air enters the gas-liquid separator 4 through a pipeline to separate the droplets in the air. After that, the dry compressed air passes through the coarse filter 5 and the fine filter 6 in sequence through the pipeline to filter out large particles and small particles in the air respectively. After that, the dry and clean compressed air enters the heat exchanger 7, and the compressed air is heated and heated by the high-temperature waste heat generated by the external equipment. The heated compressed air enters the membrane tube 8 to separate the nitrogen from other air, and then the nitrogen and other air are discharged from the two exhaust ports respectively.
[0035] Embodiment 2:
[0036] On the basis of the above-mentioned embodiment 1, in order to facilitate the treatment of impurities, the following settings are now adopted.
[0037] See also Figure 2 and Figure 3 In the above embodiment, a collecting box 9 is provided at the lower part of the coarse filter 5, and the collecting box 9 is detachably connected to the coarse filter 5. The impurities scraped off and pushed downward by the scraper 16 fall into the collecting box 9. The staff only needs to pull out the collecting box 9 regularly to dump out the impurities. After dumping the impurities, the staff can directly insert the collecting box 9 back.
[0038] The implementation principle of the utility model is as follows: first, after the compressor 2 is started, the air is compressed and sent to the air aftercooler 3 for cooling. The cooled compressed air enters the gas-liquid separator 4 through a pipeline to separate the droplets in the air. Then, the dry compressed air passes through the coarse filter 5 and the fine filter 6 in sequence through the pipeline to filter out large and small particles of impurities in the air respectively. Then, the dry and clean compressed air enters the heat exchanger 7, and the compressed air is heated and heated by the high-temperature waste heat generated by the external equipment. The heated compressed air enters the membrane tube 8 to separate the nitrogen from the other air, and then the nitrogen and the other air are discharged from the two exhaust ports respectively.
[0039] After the compressed air enters the coarse filter 5 from the gas-liquid separator 4, the large particles of impurities in the air are filtered through the filter cartridge 17, thereby removing most of the impurities in the air. When the compressed air is discharged from the coarse filter 5, it enters the volute 10, and the airflow drives the wind wheel 11 to rotate. After the wind wheel 11 rotates, it drives the worm 12 to rotate. The worm 12 meshes with the worm wheel 13 to form the first deceleration and increase the torque. After the worm wheel 13 rotates, it drives the gear 14 to rotate, and the gear 14 meshes with the toothed disc 15. Since the toothed disc 15 is larger than the gear 14 is large, thus forming a second deceleration and increasing the torque, and then the toothed disc 15 drives the scraper 16 to rotate, and after the scraper 16 rotates, it scrapes the impurities on the surface of the filter cartridge 17 and pushes it downward, which is convenient for continuous filtration and avoids clogging of the filter cartridge 17. The scraper 16 rotates very slowly through two decelerations, which avoids large wear between the scraper 16 and the filter cartridge 17, and increases the torque so that the airflow can more easily drive the wind wheel 11 to rotate, and avoids the scraper 16 forming a large resistance so that the airflow cannot drive the wind wheel 11 to rotate.
[0040] The impurities scraped off and pushed downward by the scraper 16 fall into the collection box 9. The staff only needs to regularly pull out the collection box 9 to dump the impurities. After dumping the impurities, the staff can directly insert the collection box 9 back. At the same time, the collection box 9 can be limited by setting a lock.
[0041] Although an embodiment of the utility model has been shown and described, this specific embodiment is only an explanation of the utility model and is not a limitation of the utility model. The specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions and variations to the embodiments without creative contribution as needed without departing from the principles and purpose of the utility model. However, as long as they are within the scope of the claims of the utility model, they are protected by patent law.
Claims
1. A waste heat recovery membrane separation nitrogen production system, comprising a box (1) and a coarse filter (5), characterized in that: Inside the coarse filter (5), a filter cartridge (17) is installed. Above the inside of the coarse filter (5), a toothed disc (15) is connected, and a scraper (16) is fixed to the bottom of the toothed disc (15). On one side of the inside of the coarse filter (5), a gear (14) is connected, and a worm gear (13) is connected to the top of the gear (14); A volute (10) is connected to the top of the coarse filter (5), and a wind wheel (11) is connected inside the volute (10), and a worm (12) is connected to one side of the wind wheel (11).
2. The waste heat recovery membrane separation nitrogen production system according to claim 1 is characterized in that: The filter cartridge (17) is made of stainless steel or aluminum alloy material.
3. The waste heat recovery membrane separation nitrogen production system according to claim 2 is characterized in that: The scraper (16) is spiral and the scraper (16) is in contact with the filter cartridge (17).
4. The waste heat recovery membrane separation nitrogen production system according to claim 1 is characterized in that: The cross-section of the toothed disc (15) is in an inverted "r" shape, and the diameter of the toothed disc (15) is larger than the diameter of the gear (14).
5. The waste heat recovery membrane separation nitrogen production system according to claim 4 is characterized in that: The worm (12) meshes with the worm gear (13), and the gear (14) meshes with the toothed disc (15).
6. The waste heat recovery membrane separation nitrogen production system according to claim 1 is characterized in that: Inside the box body (1), a compressor (2), an air aftercooler (3), a gas-liquid separator (4), a coarse filter (5), a fine filter (6) and a heat exchanger (7) are installed from left to right. Above the inside of the box body (1), a membrane tube (8) is installed. Pipes are connected between the air aftercooler (3), the gas-liquid separator (4), the coarse filter (5), the volute (10), the fine filter (6), the heat exchanger (7) and the membrane tube (8).
7. The waste heat recovery membrane separation nitrogen production system according to claim 6 is characterized in that: One air inlet is connected to one side of the compressor (2), and two exhaust ports are connected to one side of the membrane tube (8).
8. The waste heat recovery membrane separation nitrogen production system according to claim 1 is characterized in that: A collection box (9) is arranged below the inside of the coarse filter (5), and the collection box (9) is detachably connected to the coarse filter (5).