Tail gas treatment device for biogas purification
By enhancing the contact between biogas and desulfurization liquid through a stepped flow guide ring plate and scraper structure, the problems of incomplete desulfurization and tank wall corrosion are solved, realizing a highly efficient desulfurization and easy-to-clean exhaust gas treatment device.
Patent Information
- Application Number
- CN202422859673.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-22
- Publication Date
- 2025-10-21
- Estimated Expiration
- 2034-11-22
AI Technical Summary
Biogas passing through the gaps in the liquid falling from the spray nozzles leads to incomplete desulfurization, and the water vapor below the spray structure carries dust that corrodes the desulfurization chamber walls, affecting its service life.
The stepped flow guide ring plate and scraper structure are adopted to enhance the contact area and time between biogas and desulfurization liquid, and the scraper driven by the motor cleans the inner wall of the desulfurization chamber to prevent blockage.
It improves the desulfurization effect, prevents corrosion of the desulfurization chamber walls, extends service life, and avoids filter clogging.
Smart Images
Figure CN223458301U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of biogas purification, in particular to a tail gas treatment device for biogas purification. Background Art
[0002] Sewage treatment plants produce a large amount of biogas. When the biogas is burned without purification, the sulfur dioxide content in the flue gas is high, which increases the cost of flue gas treatment and the probability of corrosion. Secondly, the carbon dioxide content is high, which increases the heat loss of flue gas. Therefore, in order to reduce environmental pollution and waste of resources, a tail gas treatment device for biogas purification is needed to treat the biogas in the tail gas.
[0003] The existing tail gas treatment process steps are desulfurization, pre-compression, membrane decarbonization, post-compression, liquefaction and tank truck transportation. The desulfurization process of the desulfurization chamber used for tail gas treatment is as follows: biogas enters the complex iron desulfurization system, is first pressurized by the booster fan, and enters the desulfurization tower. The biogas enters from the bottom of the absorption tower and contacts the desulfurization liquid sprayed from the top of the absorption tower in reverse. Hydrogen sulfide is removed during the rising process. After the lean liquid sprayed absorbs hydrogen sulfide, the Fe in the solution is 3+ Reacts with hydrogen sulfide to form Fe 2+ And produce sulfur, in which the biogas may pass through the gaps between the sprayed liquids during the upward flow, resulting in incomplete desulfurization of the biogas and affecting the desulfurization effect. In addition, the water vapor formed during the spraying process under the spray structure in the desulfurization chamber may adsorb the dust carried in the biogas on the bulkhead of the desulfurization chamber. If it is not cleaned in time, the chemical substances contained in the dust may gradually corrode the bulkhead due to long-term retention, affecting the service life of the desulfurization chamber. Utility Model Content
[0004] The purpose of the utility model is to solve the problem that biogas may pass through the gaps between the sprayed and falling liquids during the upward flow process, thereby causing incomplete desulfurization of the biogas and affecting the desulfurization effect, and the water vapor formed during the spraying process below the spray structure provided in the desulfurization chamber may adsorb the dust carried in the biogas on the bulkhead of the desulfurization chamber. If it is not cleaned in time, the chemical substances contained in the dust may gradually corrode the bulkhead due to long-term residence and affect the service life of the desulfurization chamber. A tail gas treatment device for biogas purification is provided.
[0005] In order to achieve the above object, the utility model provides the following technical scheme: a tail gas treatment device for biogas purification, including the desulfurization cabin, the middle part of the inside bottom end of desulfurization cabin is equipped with booster fan, the top of booster fan is equipped with buoyancy plate, the left and right ends of buoyancy plate upper surface all are fixedly connected with a slide rod, the top of slide rod is equipped with filter plate, the outside of filter plate is fixedly connected with the inner wall of inside of desulfurization cabin, the upper surface of filter plate is equipped with valve plate, the top of slide rod is fixedly connected with the lower surface of valve plate, the middle part of inside of desulfurization cabin is rotatably connected with drive ring plate, the middle part of drive ring plate top is fixedly connected with the ladder shape drainage ring plate, the left and right ends of ladder shape drainage ring plate lower surface all are equipped with a scraper no.
[0006] As the further scheme of the utility model: the middle part of one end of drive ring plate is engagedly connected with gear, the middle part of gear top is fixedly connected with motor.
[0007] As the further scheme of the utility model: the outside of desulfurization cabin bottom end is uniformly fixed with a plurality of support legs, the bottom of support leg is fixedly connected with base plate, the bottom of booster fan is fixedly connected with wind force delivery pipe.
[0008] As the further scheme of the utility model: the bottom of one end of desulfurization cabin is fixedly connected with tail gas inlet pipe, the top of one end middle part of desulfurization cabin is equipped with desulfurization liquid delivery pipe, the top of one end of desulfurization liquid delivery pipe is fixedly connected with water jet pipe, the below of water jet pipe is uniformly fixed with a plurality of shower nozzles.
[0009] As the further scheme of the utility model: the middle part of top of desulfurization cabin is fixedly connected with biogas delivery pipe, the inner wall of desulfurization cabin is rotatably connected with scraper no.
[0010] As the further scheme of the utility model: the upper surface of filter plate is uniformly equipped with a plurality of holes, the top of slide rod outside is equipped with limit block, the one end of limit block is fixedly connected with filter plate through corresponding hole, the slide rod is slidably connected with filter plate through limit block.
[0011] Compared with the prior art, the utility model has the advantages of: facilitating annular drainage of tail gas, facilitating improvement of contact area and contact time of tail gas and desulfurization liquid, thereby improving desulfurization effect, facilitating positioning and scraping cleaning of the inner wall of desulfurization cabin, and preventing filter hole from being blocked to affect desulfurization effect.
[0012] 1. By setting the ladder-shaped drainage ring plate, when desulfurization, biogas flows slowly along the surface of the ladder-shaped drainage ring plate through the drainage of the ladder-shaped drainage ring plate, so that the flowing biogas spreads on the surface of the ladder-shaped drainage ring plate, and the desulfurization liquid enters the water spray pipe through the desulfurization liquid conveying pipe, and is sprayed out through the fixed spray head below the water spray pipe. The desulfurization liquid sprayed out spreads on the upper surface of the ladder-shaped drainage ring plate. When the gas flows and flows through the holes provided on the ladder-shaped drainage ring plate, the flowing biogas is preliminarily desulfurized by the desulfurization liquid. When the biogas moves upward and separates from the surface of the ladder-shaped drainage ring plate, the biogas enters the spraying area and is subjected to secondary desulfurization by the desulfurization liquid sprayed down. It is convenient to circularly guide the tail gas, which is beneficial to increase the contact area and contact time of the tail gas and the desulfurization liquid, thereby improving the desulfurization effect.
[0013] 2. By setting the motor, gear, drive ring plate, scraper two and scraper one, when cleaning the desulfurization cabin, the motor is started, the gear fixedly connected to the output end of the motor is first rotated clockwise, the rotating gear drives the drive ring plate engaged at one end to rotate, thereby driving the ladder-shaped drainage ring plate fixedly connected to the top of the drive ring plate to rotate around the inner wall of the desulfurization cabin, and the ladder-shaped drainage ring plate rotates along the scraper one. The rotating scraper two can clean the inner wall of the desulfurization cabin, and the scraper one can clean the outer surface of the ladder-shaped drainage ring plate. The slag scraped off by the scraper two falls onto the inner surface of the ladder-shaped drainage ring plate under the action of gravity, which is convenient for positioning and scraping cleaning of the inner wall of the desulfurization cabin, and is beneficial to prevent the filter hole from being blocked to affect the desulfurization effect. BRIEF DESCRIPTION OF DRAWINGS
[0014] Figure 1 It is a sectional structure schematic view of the front view of the utility model;
[0015] Figure 2 It is a sectional structure schematic view of the front view of the utility model Figure 1 It is a sectional structure schematic view of the front view of the utility model
[0016] Figure 3 It is a sectional structure schematic view of the front view of the utility model Figure 1 It is a sectional structure schematic view of the front view of the utility model
[0017] Figure 4 It is a sectional structure schematic view of the front view of the utility model
[0018] In the figure: 1, base plate; 2, support leg; 3, desulfurization cabin; 4, booster fan; 5, wind force conveying pipe; 6, tail gas inlet pipe; 7, filter plate; 8, sliding rod; 9, buoyancy plate; 10, valve plate; 11, scraper one; 12, desulfurization liquid conveying pipe; 13, ladder-shaped drainage ring plate; 14, scraper two; 15, spray head; 16, water spraying pipe; 17, marsh gas conveying pipe; 18, driving ring plate; 19, motor; 20, gear. DETAILED DESCRIPTION
[0019] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.
[0020] Please refer to Figures 1-4 In the embodiments of the utility model, a tail gas treatment device for marsh gas purification includes a desulfurization cabin 3, the middle part of the inner side bottom end of the desulfurization cabin 3 is provided with a booster fan 4, the top of the booster fan 4 is provided with a buoyancy plate 9, the left and right ends of the upper surface of the buoyancy plate 9 are both fixedly connected with a sliding rod 8, the upper part of the sliding rod 8 is provided with a filter plate 7, the outer side of the filter plate 7 is fixedly connected with the inner wall of the inner side of the desulfurization cabin 3, the upper surface of the filter plate 7 is provided with a valve plate 10, the top of the sliding rod 8 is fixedly connected with the lower surface of the valve plate 10, the middle part of the inner side of the desulfurization cabin 3 is rotatably connected with a driving ring plate 18, the middle part of the top end of the driving ring plate 18 is fixedly connected with a ladder-shaped drainage ring plate 13, the bottom of one end of the desulfurization cabin 3 is fixedly connected with a tail gas inlet pipe 6, the upper part of the middle part of one end of the desulfurization cabin 3 is provided with a desulfurization liquid conveying pipe 12, the upper part of one end of the desulfurization liquid conveying pipe 12 is fixedly connected with a water spraying pipe 16, a plurality of spray heads 15 are uniformly fixed below the water spraying pipe 16, the middle part of the top end of the desulfurization cabin 3 is fixedly connected with a marsh gas conveying pipe 17, scraper two 14 is rotatably connected with the inner wall of the desulfurization cabin 3, a plurality of holes are uniformly arranged on the upper surface of the filter plate 7, the upper part of the outer side of the sliding rod 8 is provided with a limiting block, the limiting block is fixedly connected with one end of the filter plate 7 through the corresponding hole, the sliding rod 8 is slidably connected with the filter plate 7 through the limiting block, a plurality of support legs 2 are uniformly fixed on the outer side of the bottom end of the desulfurization cabin 3, the bottom end of the support leg 2 is fixedly connected with a base plate 1, the bottom of the booster fan 4 is fixedly connected with a wind force conveying pipe 5, one end above the filter plate 7 is provided with a communication pipe.
[0021] In this embodiment: when desulfurization, biogas through the tail gas into the tube 6 into the desulfurization cabin 3 inside the bottom, start the booster fan 4, the wind power out of the booster fan 4 to push the flow of biogas up, the air pressure will push the buoyancy plate 9 to move up, the buoyancy plate 9 will move up through the top fixed connection of the slide rod 8 slide rod 8 top fixed connection of the valve plate 10 to the filter plate 7 above the move, the opening of the hole, the biogas through the hole in the filter plate 7 flow into the gap between the valve plate 10 and the filter plate 7, and through the gap between the valve plate 10 hole in the direction of the ladder-shaped drainage ring plate 13 below, under the guidance of the ladder-shaped drainage ring plate 13 along the surface of the ladder-shaped drainage ring plate 13 slowly up, the desulfurization liquid through the desulfurization liquid delivery pipe 12 into the water jet pipe 16, and through the fixed spray head 15 below the water jet pipe 16 spray out, the desulfurization liquid sprayed on the surface of the ladder-shaped drainage ring plate 13 flows, when the gas flow contacts the desulfurization liquid, the desulfurization liquid flows to the biogas for primary desulfurization, when the biogas moves up and separates from the surface of the ladder-shaped drainage ring plate 13, the biogas enters the spray area by the desulfurization liquid falling down for secondary desulfurization, the desulfurization liquid falls along the ladder-shaped drainage ring plate 13 to the middle of the upper surface of the valve plate 10, because the middle of the upper surface of the valve plate 10 is not set up hole, the desulfurization liquid will flow along the valve plate 10 to one end and slide to the middle of the upper surface of the filter plate 7, and along the inclined angle of the filter plate 7 to one end and flow into the communication pipe, through the communication pipe to the tank in the tank, the secondary desulfurization of biogas continues to flow up through the biogas delivery pipe 17 into the membrane separation decarburization cabin;
[0022] By setting the buoyancy plate 9, the valve plate 10 and the filter plate 7, it is beneficial to prevent the desulfurization liquid falling into the booster fan 4 from damaging the booster fan 4.
[0023] Please refer to Figure 1 、 Figure 2 、 Figure 3 and Figure 4 , the middle of one end of the driving ring plate 18 is engaged with the gear 20, the middle of the top end of the gear 20 is fixedly connected with the motor 19, the left and right ends of the lower surface of the ladder-shaped drainage ring plate 13 are provided with a scraper 11, one end of the scraper 11 is fixedly connected with the inner wall of the inside of the desulfurization cabin 3, and the left and right ends of the top of the ladder-shaped drainage ring plate 13 are fixedly connected with a scraper 14.
[0024] In the embodiment, when the desulfurization cabin 3 is cleaned, the motor 19 is started, and the gear 20 fixedly connected to the output end of the motor 19 is first rotated clockwise, the rotating gear 20 drives the driving ring plate 18 engaged at the middle of one end to rotate, so that the driving ring plate 18 drives the group of scraper two 14 fixedly connected above the stepped guide ring plate 13 to rotate around the inner wall of the desulfurization cabin 3, at the same time, the stepped guide ring plate 13 rotates along the scraper one 11, the rotating scraper two 14 scrapes and brushes the inner wall of the desulfurization cabin 3, and the scraper one 11 scrapes and brushes the outer surface of the stepped guide ring plate 13, the slag scraped off by the scraper two 14 falls to the inner surface of the stepped guide ring plate 13 under the action of gravity, slides down along the inner side of the stepped guide ring plate 13, passes through the driving ring plate 18 and falls to the surface of the valve plate 10, the slag scraped off by the scraper one 11 falls to the surface of the valve plate 10 under the action of gravity, and the slag slides into the communication pipe along the inclined angle of the valve plate 10 and the filter plate 7 and is discharged from the desulfurization cabin through the communication pipe.
[0025] The above merely describes a preferred embodiment of the present application, and the protection scope of the present application is not limited to this. Any person skilled in the art, according to the technical scheme and the inventive concept of the present application, can make equivalent replacement or change within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.
Claims
1. A tail gas treatment device for biogas purification, comprising a desulphurization cabin (3), characterized in that, The middle part of the inside bottom end of the desulfurization cabin (3) is provided with a booster fan (4), the top of the booster fan (4) is provided with a buoyancy plate (9), the left and right ends of the upper surface of the buoyancy plate (9) are fixedly connected with a sliding rod (8), the upper side of the sliding rod (8) is provided with a filter plate (7), the outer side of the filter plate (7) is fixedly connected with the inner wall of the inside of the desulfurization cabin (3), the upper surface of the filter plate (7) is provided with a valve plate (10), the top of the sliding rod (8) is fixedly connected with the lower surface of the valve plate (10), the middle part of the inside of the desulfurization cabin (3) is rotatably connected with a driving ring plate (18), the middle part of the top end of the driving ring plate (18) is fixedly connected with a stepped drainage ring plate (13), the left and right ends of the lower surface of the stepped drainage ring plate (13) are both provided with a scraper (11), one end of the scraper (11) is fixedly connected with the inner wall of the inside of the desulfurization cabin (3), the left and right ends of the top of the stepped drainage ring plate (13) are both fixedly connected with a scraper (14).
2. A tail gas treatment device for biogas upgrading according to claim 1, characterized in that, The middle part of one end of the driving ring plate (18) is meshingly connected with a gear (20), the middle part of the top end of the gear (20) is fixedly connected with a motor (19).
3. The tail gas treatment device for biogas purification according to claim 1, characterized in that, The outside of the bottom end of the desulfurization cabin (3) is uniformly fixedly connected with a plurality of supporting legs (2), the bottom end of the supporting leg (2) is fixedly connected with a base plate (1), the bottom of the booster fan (4) is fixedly connected with a wind power conveying pipe (5).
4. The tail gas treatment device for biogas purification according to claim 1, characterized in that, The bottom of one end of the desulfurization cabin (3) is fixedly connected with a tail gas inlet pipe (6), the upper side of the middle part of one end of the desulfurization cabin (3) is provided with a desulfurization liquid conveying pipe (12), the upper side of one end of the desulfurization liquid conveying pipe (12) is fixedly connected with a water spraying pipe (16), the lower side of the water spraying pipe (16) is uniformly fixedly connected with a plurality of spray heads (15).
5. The tail gas treatment device for biogas purification according to claim 1, characterized in that, The middle part of the top end of the desulfurization cabin (3) is fixedly connected with a biogas conveying pipe (17), the inner wall of the desulfurization cabin (3) is rotatably connected with the scraper (14).
6. The tail gas treatment device for biogas purification according to claim 1, characterized in that, A plurality of holes are uniformly formed in the upper surface of the filter plate (7), the upper side of the outer side of the sliding rod (8) is provided with a limiting block, the limiting block is fixedly connected with one end of the filter plate (7) through the corresponding hole, and the sliding rod (8) is slidably connected with the filter plate (7) through the limiting block.