Tail gas filtering device for hydrogen production based on BOG tail gas
By designing a filter device with a motor-driven strip brush plate and a dust removal brush, the problem of dust accumulation in BOG exhaust gas was solved, enabling convenient dust cleaning and improving heat recovery rate, thus enhancing the filtration effect.
Patent Information
- Application Number
- CN202520174185.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-26
- Publication Date
- 2026-02-24
- Estimated Expiration
- 2035-01-26
AI Technical Summary
Dust in BOG exhaust gas tends to accumulate on the filter screen, affecting the filtration effect. Furthermore, existing filters are inconvenient to clean, making it difficult to achieve centralized dust removal.
A filtration device was designed, comprising a filter screen, a motor-driven strip brush plate, and a dust removal brush. The motor drives the strip brush plate to rotate, which in turn drives the dust removal brush to clean the dust on the filter screen and collect it into an annular dust storage tank. At the same time, staggered inner pipes and a central water pipe are used for exhaust gas heat exchange to improve the heat recovery rate.
It enables convenient cleaning of filter dust and centralized dust collection, improving the filtration effect, and enhances the heat recovery rate of exhaust gas through the staggered internal pipe and water pipe structure.
Smart Images
Figure CN223930935U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of BOG tail gas hydrogen production technology, specifically a tail gas filtration device based on BOG tail gas hydrogen production. Background Technology
[0002] The main component of BOG gas is methane (CH4). This gas is produced by microorganisms decomposing organic matter in swamps, such as dead plants and animals. When these organic materials are decomposed by microorganisms, a large amount of gas is produced. It is mainly found in wetland ecosystems, such as swamps, lakes, and rivers. With the increasing awareness of clean energy and ecological protection, its development and utilization will become more widespread.
[0003] BOG exhaust gas can be converted into hydrogen through LNG cracking and hydrogen production equipment. This process generates a large amount of exhaust gas containing dust, impurities, and harmful gases. Direct discharge of this exhaust gas not only pollutes the air but also harms human health; therefore, filtration is necessary. Filtration devices typically use filter screens and activated carbon. However, dust in BOG exhaust gas easily accumulates on the filter screens, affecting filtration efficiency. Cleaning the filter screens requires disassembly, which is cumbersome and makes it difficult to collect and dispose of the removed dust. Therefore, improvements are urgently needed. Utility Model Content
[0004] In view of the above-described background technology, dust in existing BOG exhaust gas tends to accumulate on the filter screen, which affects the filtration effect. In order to address this technical problem, this utility model proposes an exhaust gas filtration device based on BOG exhaust gas hydrogen production.
[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:
[0006] This utility model discloses a tail gas filtration device for hydrogen production based on BOG tail gas, characterized in that it includes a device body, an inner cylinder and a filter screen. The device body is provided with a filter chamber, the inner cylinder is fixed in the filter chamber inside the device body, and an inner tube is fixed inside the inner cylinder. An air inlet pipe is provided at the bottom of the inner tube, and the air inlet pipe is used to introduce tail gas generated by BOG tail gas hydrogen production into the inner tube.
[0007] The filter screen is fixed in the filter chamber above the inner cylinder. A motor is installed at the top of the filter chamber above the filter screen. The output end of the motor passes through the filter screen and extends to the bottom of the filter screen, connecting with a strip brush plate located below the filter screen. The strip brush plate contacts the filter screen. The filter screen is used to filter the tail gas generated by hydrogen production from BOG tail gas.
[0008] Further specifying, a cleaning brush is installed on the side of the strip brush plate near the filter screen, and the strip brush plate is in contact with the cleaning brush.
[0009] Further specified, the bottom end of the main body of the device is provided with a base, and an annular ash storage trough is provided on the side of the base near the filter chamber. The annular ash storage trough is located between the inner wall of the main body of the device and the inner cylinder.
[0010] Furthermore, the top of the inner cylinder is provided with an arc surface, and the dust brushed off from the filter screen slides down the arc surface into the annular ash storage tank.
[0011] Further specifying, the top of the device body above the filter chamber is provided with an adsorption chamber, the adsorption chamber is connected to the filter chamber, and the adsorption chamber is provided with a first activated carbon layer and a second activated carbon layer stacked from bottom to top inside the adsorption chamber.
[0012] Further specified, an exhaust pipe is installed at the top of the device body above the adsorption chamber, and the exhaust pipe is connected to the adsorption chamber.
[0013] Further specified, a heat absorption chamber is provided between the inner cylinder and the inner tube, and a central water pipe is fixed inside the inner tube; the top and bottom of the central water pipe are respectively connected to an inlet pipe and an outlet pipe, and the top and bottom of the central water pipe are both connected to the heat absorption chamber through branch pipes.
[0014] Furthermore, baffles are fixed on the inner wall of the inner tube and the outer wall of the central water pipe, and the baffles on the inner tube and the baffles on the central water pipe are arranged alternately.
[0015] Further specified, the top end of the inner tube is provided with a first opening, and the center position of the top end of the inner cylinder is provided with a second opening, and the first opening and the second opening are connected.
[0016] Furthermore, the outer wall of the annular ash storage trough is in close contact with the inner wall of the main body of the device, and the inner wall of the annular ash storage trough is in close contact with the outer wall of the inner cylinder.
[0017] Compared with the prior art, the beneficial effects of this utility model are:
[0018] 1. In this utility model, the exhaust gas generated by BOG tail gas hydrogen production enters the inner tube through the inlet pipe. The exhaust gas rises through the first and second openings and passes through the filter screen for filtration. The filter screen filters out the dust in the exhaust gas. The exhaust gas enters the adsorption chamber and comes into uniform contact with the first and second activated carbon layers. The first and second activated carbon layers absorb the harmful substances in the exhaust gas. The filtered exhaust gas is discharged from the exhaust pipe. The motor drives the strip brush plate to rotate, and the strip brush plate drives the dust cleaning brush to clean the lower surface of the filter screen, brushing off the accumulated dust on the filter screen. The accumulated dust falls to the top of the inner cylinder and falls into the annular ash storage tank under the guidance of the arc surface. Pulling the base removes the annular ash storage tank from the bottom of the device body, and the dust can be poured out in a concentrated manner, which facilitates quick dust cleaning. It is easy to operate and highly practical.
[0019] 2. In this utility model, cold water is introduced into the central water pipe through the inlet pipe. The central water pipe then introduces the cold water into the heat absorption chamber through the branch pipe. The cold water in the central water pipe and the heat absorption chamber exchanges heat with the exhaust gas inside the inner pipe from the inner and outer sides, respectively. The heat absorption efficiency is high. The baffles on the inner pipe and the central water pipe are staggered, which slows down the upward speed of the exhaust gas and prolongs the heat exchange time between the exhaust gas and the cold water in the central water pipe and the heat absorption chamber, thereby improving the heat recovery rate. The hot water after heat absorption is discharged from the outlet pipe. Attached Figure Description
[0020] Figure 1 This is a cross-sectional structural diagram of the present invention;
[0021] Figure 2 This is an enlarged structural diagram of the inner cylinder of this utility model;
[0022] Figure 3 This is an enlarged schematic diagram of the filter screen structure of this utility model;
[0023] Figure 4 This is a magnified view of the filter screen structure of this utility model from below;
[0024] Figure 5 This is a top-view enlarged structural diagram of the base of this utility model.
[0025] In the diagram: 1. Main body of the device; 2. Filter chamber; 3. Inner cylinder; 4. Inner tube; 5. Central water pipe; 6. Filter screen; 7. Adsorption chamber; 8. First activated carbon layer; 9. Second activated carbon layer; 10. Exhaust pipe; 11. Base; 12. Annular ash storage tank; 13. Heat absorption chamber; 14. First opening; 15. Second opening; 16. Arc surface; 17. Water inlet pipe; 18. Branch pipe; 19. Baffle plate; 20. Water outlet pipe; 21. Air inlet pipe; 22. Motor; 23. Strip brush plate; 24. Ash cleaning brush. Detailed Implementation
[0026] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Therefore, the following detailed description of the embodiments of this utility model provided in the drawings is not intended to limit the scope of the claimed utility model, but merely to illustrate selected embodiments of the utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.
[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.
[0028] Please see Figure 1-5 The present invention provides an embodiment of a tail gas filtration device for hydrogen production based on BOG tail gas, comprising a device body 1, a filter chamber 2, an inner cylinder 3, and a filter screen 6. The inner cylinder 3 is fixed in the filter chamber 2 inside the device body 1, and an inner tube 4 is fixed inside the inner cylinder 3. An air inlet pipe 21 is provided at the bottom of each inner tube 4, and an arc surface 16 is provided at the top of the inner cylinder 3.
[0029] Specifically, the exhaust gas continues to rise through the first opening 14 and the second opening 15 and passes through the filter screen 6 for filtration. The filter screen 6 filters out the dust in the exhaust gas. Then, the exhaust gas enters the adsorption chamber 7 and comes into uniform contact with the first activated carbon layer 8 and the second activated carbon layer 9. The first activated carbon layer 8 and the second activated carbon layer 9 absorb the harmful substances in the exhaust gas, and the filtered exhaust gas is discharged from the exhaust pipe 10.
[0030] The filter screen 6 is fixed inside the filter chamber 2 above the inner cylinder 3. A motor 22 is installed on the top of the filter chamber 2 above the filter screen 6. The output end of the motor 22 passes through the filter screen 6 and is equipped with a strip brush plate 23. A cleaning brush 24 is installed on the top of the strip brush plate 23. The cleaning brush 24 is in close contact with the bottom end of the filter screen 6.
[0031] Specifically, the motor 22 drives the strip brush plate 23 to rotate, and the strip brush plate 23 drives the dust removal brush 24 to brush the lower surface of the filter screen 6, brushing off the accumulated dust on the filter screen 6. The accumulated dust falls to the top of the inner cylinder 3 and falls into the annular dust storage tank 12 under the guidance of the arc surface 16. Pulling the base 11 removes the annular dust storage tank 12 from the bottom of the main body 1 of the device, so that the dust can be poured out in a concentrated manner, which facilitates the quick cleaning of dust. It is easy to operate and highly practical.
[0032] The bottom of the main body 1 of the device is provided with a base 11, and the top of the base 11 extends to the bottom of the filter chamber 2 and is provided with an annular ash storage tank 12.
[0033] A heat absorption chamber 13 is provided between the inner cylinder 3 and the inner tube 4, and a central water pipe 5 is fixed inside the inner tube 4.
[0034] The top and bottom outer walls of the central water pipe 5 are respectively equipped with an inlet pipe 17 and an outlet pipe 20, and the top and bottom of the central water pipe 5 are connected to the heat absorption chamber 13 through a branch pipe 18.
[0035] Baffles 19 are fixed on the inner wall of the inner pipe 4 and the outer wall of the central water pipe 5, and the baffles 19 are arranged alternately.
[0036] Specifically, the exhaust gas generated by BOG tail gas hydrogen production enters the inner tube 4 through the inlet pipe 21. The exhaust gas rises and is introduced into the central water pipe 5 through the water inlet pipe 17. The central water pipe 5 introduces the cold water into the heat absorption chamber 13 through the branch pipe 18. The cold water in the central water pipe 5 and the heat absorption chamber 13 exchange heat with the exhaust gas inside the inner tube 4 from the inside and outside, respectively, resulting in high heat absorption efficiency.
[0037] Furthermore, due to the staggered arrangement of the baffles 19, the upward speed of the exhaust gas is slowed down, which can prolong the heat exchange time between the exhaust gas and the cold water in the central water pipe 5 and the heat absorption chamber 13, thereby improving the heat recovery rate. The hot water after heat absorption is discharged from the outlet pipe 20.
[0038] An adsorption chamber 7 is provided on the top of the main body 1 above the filter chamber 2. The adsorption chamber 7 is connected to the filter chamber 2, and a first activated carbon layer 8 and a second activated carbon layer 9 are respectively provided inside the adsorption chamber 7.
[0039] An exhaust pipe 10 is installed at the top of the main body 1 above the adsorption chamber 7, and the exhaust pipe 10 is connected to the adsorption chamber 7.
[0040] The top of the inner tube 4 is provided with a first opening 14, and the center of the top of the inner cylinder 3 is provided with a second opening 15.
[0041] The outer wall of the annular ash storage trough 12 is tightly fitted with the inner wall of the main body 1 of the device, and the inner wall of the annular ash storage trough 12 is tightly fitted with the outer wall of the inner cylinder 3.
[0042] In this embodiment, the following steps are taken: First, the exhaust gas generated from the BOG exhaust gas hydrogen production enters the inner pipe 4 through the inlet pipe 21. The exhaust gas rises and is guided by the water inlet pipe 17 to the central water pipe 5. The central water pipe 5 then guides the cold water into the heat absorption chamber 13 through the branch pipe 18. The cold water in the central water pipe 5 and the heat absorption chamber 13 exchanges heat with the exhaust gas inside the inner pipe 4 from the inside and outside, respectively, resulting in high heat absorption efficiency. Due to the staggered arrangement of the baffles 19, the upward speed of the exhaust gas is slowed down, which prolongs the heat exchange time between the exhaust gas and the cold water in the central water pipe 5 and the heat absorption chamber 13, thereby improving the heat recovery rate. The heated water is discharged from the outlet pipe 20. Then, the exhaust gas continues to rise through the first opening 14 and the second opening 15 and passes through the filter screen 6 for further processing. The filter screen 6 filters out the dust in the exhaust gas. Then, the exhaust gas enters the adsorption chamber 7 and comes into uniform contact with the first activated carbon layer 8 and the second activated carbon layer 9. The first activated carbon layer 8 and the second activated carbon layer 9 absorb the harmful substances in the exhaust gas. The filtered exhaust gas is discharged from the exhaust pipe 10. The motor 22 drives the strip brush plate 23 to rotate. The strip brush plate 23 drives the dust cleaning brush 24 to brush the lower surface of the filter screen 6, brushing off the accumulated dust on the filter screen 6. The accumulated dust falls to the top of the inner cylinder 3 and falls into the annular dust storage tank 12 under the guidance of the arc surface 16. Pulling the base 11 removes the annular dust storage tank 12 from the bottom of the main body 1 of the device, so that the dust can be poured out in a concentrated manner, which facilitates the quick cleaning of dust. It is easy to operate and highly practical.
[0043] Obviously, the embodiments described above are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.
Claims
1. A tail gas filtration device for hydrogen production based on BOG tail gas, characterized in that, The device includes a main body (1), an inner cylinder (3), and a filter screen (6). The main body (1) is provided with a filter chamber (2). The inner cylinder (3) is fixed in the filter chamber (2) inside the main body (1). An inner tube (4) is fixed inside the inner cylinder (3). An air inlet pipe (21) is provided at the bottom of each inner tube (4). The air inlet pipe (21) is used to introduce the tail gas generated by BOG tail gas hydrogen production into the inner tube (4). The filter screen (6) is fixed in the filter chamber (2) above the inner cylinder (3). A motor (22) is installed on the top of the filter chamber (2) above the filter screen (6). The output end of the motor (22) passes through the filter screen (6) and extends to the bottom of the filter screen (6) to connect with the strip brush plate (23) located below the filter screen (6). The strip brush plate (23) contacts the filter screen (6). The filter screen (6) is used to filter the tail gas generated by BOG tail gas hydrogen production.
2. The tail gas filtration device for hydrogen production based on BOG tail gas according to claim 1, characterized in that, A cleaning brush (24) is installed on the side of the strip brush plate (23) near the filter screen (6), and the strip brush plate (23) is in contact with the cleaning brush (24).
3. The tail gas filtration device for hydrogen production based on BOG tail gas according to claim 2, characterized in that, The device body (1) has a base (11) at its bottom end, and an annular ash storage trough (12) is provided on the side of the base (11) near the filter chamber (2). The annular ash storage trough (12) is located between the inner wall of the device body (1) and the inner cylinder (3).
4. The tail gas filtration device for hydrogen production based on BOG tail gas according to claim 3, characterized in that, The top of the inner cylinder (3) is provided with an arc surface (16), and the dust brushed off from the filter screen (6) slides down along the arc surface (16) into the annular ash storage tank (12).
5. The tail gas filtration device for hydrogen production based on BOG tail gas according to claim 4, characterized in that, An adsorption chamber (7) is provided on the top of the main body (1) of the device above the filter chamber (2). The adsorption chamber (7) is connected to the filter chamber (2), and the adsorption chamber (7) is provided with a first activated carbon layer (8) and a second activated carbon layer (9) stacked from bottom to top inside.
6. The tail gas filtration device for hydrogen production based on BOG tail gas according to claim 5, characterized in that, An exhaust pipe (10) is installed at the top of the main body (1) of the device above the adsorption chamber (7), and the exhaust pipe (10) is connected to the adsorption chamber (7).
7. The tail gas filtration device for hydrogen production based on BOG tail gas according to claim 1, characterized in that, A heat absorption chamber (13) is provided between the inner cylinder (3) and the inner tube (4). A central water pipe (5) is fixed inside the inner tube (4). The top and bottom of the central water pipe (5) are respectively connected to an inlet pipe (17) and an outlet pipe (20), and the top and bottom of the central water pipe (5) are connected to the heat absorption chamber (13) through a branch pipe (18).
8. The tail gas filtration device for hydrogen production based on BOG tail gas according to claim 7, characterized in that, Baffles (19) are fixed on the inner wall of the inner tube (4) and the outer wall of the central water pipe (5), and the baffles (19) on the inner tube (4) and the baffles (19) on the central water pipe (5) are arranged alternately.
9. The tail gas filtration device for hydrogen production based on BOG tail gas according to claim 8, characterized in that, The inner tube (4) has a first opening (14) at its top end, and the inner cylinder (3) has a second opening (15) at its center at the top end. The first opening (14) and the second opening (15) are connected.
10. The tail gas filtration device for hydrogen production based on BOG tail gas according to claim 3, characterized in that, The outer wall of the annular ash storage trough (12) is closely fitted with the inner wall of the main body (1) of the device, and the inner wall of the annular ash storage trough (12) is closely fitted with the outer wall of the inner cylinder (3).