High-efficiency purification device before biogas power generation

Abstract

The utility model relates to the technical field of biogas power generation, and discloses an efficient biogas power generation pre-purification device which comprises a primary mixing pipe, the top end of the primary mixing pipe is communicated with a secondary mixing tower, the gas inlet end of the primary mixing pipe is communicated with a gas inlet pipe, and the liquid inlet end of the primary mixing pipe is communicated with a liquid inlet pipe. The gas inlet pipe and the liquid inlet pipe are both close to the bottom end of the first-stage mixing pipe, a mounting column is fixedly mounted in the first-stage mixing pipe, desulfurized biogas is discharged into a power generation system from the first purification gas pipe, a desulfurization solvent flows into the cyclone separator from the liquid outlet pipe, the biogas mixed in the desulfurization solvent is separated by the cyclone separator, and the desulfurized biogas is discharged into the power generation system from the second purification gas pipe. The biogas enters the power generation system from the second purification gas pipe, the desulfurization solvent is discharged into the aeration tank through the liquid discharging pipe, the biogas and the desulfurization solvent are flowing in the whole process, that is, the desulfurization solvent participating in desulfurization can be updated all the time, and then desulfurization purification of the biogas is ensured.

Description

Technical Field

[0001] This utility model relates to the field of biogas power generation technology, specifically to a high-efficiency biogas power generation pre-purification device. Background Technology

[0002] Biogas power generation and purification equipment primarily involves transporting biogas fermented in a biogas digester to the purification unit. The purification unit uses an internal desulfurization agent to chemically absorb sulfur dioxide and other substances unsuitable for combustion, ensuring the purified biogas meets combustion standards. However, during the desulfurization process, especially in biogas purification tanks, the biogas needs to be transported to a desulfurization solvent inside the tank. This solvent chemically absorbs sulfur dioxide, ultimately resulting in purified biogas containing trace amounts or no sulfur dioxide. However, the biogas is directly transported to the desulfurization tank... In sulfur-containing solvents, biogas produces large bubbles when it floats to the surface. This prevents the biogas from fully mixing and contacting the desulfurization solvent, resulting in the purified biogas still containing a large amount of sulfur dioxide. Therefore, most biogas power generation and purification equipment uses a method of simultaneously stirring the desulfurization solvent and injecting biogas to purify it. Although this method can achieve the purification effect, the desulfurization performance of the desulfurization solvent decreases after a period of use and needs to be replaced. However, when using the above method for purification, it is often necessary to stop injecting biogas when replacing the desulfurization solvent to prevent biogas from escaping during the replacement process. Utility Model Content

[0003] The purpose of this invention is to provide a high-efficiency biogas power generation pre-purification device to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a high-efficiency biogas power generation pre-purification device, comprising a primary mixing pipe, a secondary mixing tower connected to the top of the primary mixing pipe, an air inlet pipe connected to the air inlet end of the primary mixing pipe, and a liquid inlet pipe connected to the liquid inlet end of the primary mixing pipe. Both the air inlet pipe and the liquid inlet pipe are close to the bottom end of the primary mixing pipe. An installation column is fixedly installed inside the primary mixing pipe, and circulating blades are fixedly installed on the outer wall of the installation column. The circulating blades are distributed in a spiral pattern from bottom to top. A stirring mechanism is provided inside the secondary mixing tower. A purified gas pipe is connected to the air outlet end of the secondary mixing tower, and a liquid outlet pipe is connected to the liquid outlet end of the secondary mixing tower. The right end of the liquid outlet pipe is connected to the input end of a cyclone separator. A purified gas pipe is connected to the air outlet end of the cyclone separator, and a drain pipe is connected to the liquid outlet end of the cyclone separator. The end of the drain pipe away from the cyclone separator extends into the aeration tank.

[0005] Furthermore, a fluid booster pump is installed at the connection point between the air inlet pipe, the liquid inlet pipe, and the primary mixing pipe.

[0006] Furthermore, the stirring mechanism includes a motor, which is fixedly installed at the top of the secondary mixing tower. A rotating shaft is fixedly installed at the output end of the motor, and a tower-shaped stirring blade is fixedly installed on the outer wall of the rotating shaft. The tower-shaped stirring blade is located inside the secondary mixing tower.

[0007] Furthermore, the motor is covered by a sealing cover, which is fixedly installed on the top of the secondary mixing tower, and the rotating shaft passes through the top of the secondary mixing tower via a sealed bearing.

[0008] Furthermore, a mounting ring one is fixedly installed at the bottom end of the rotating shaft, and a mounting ring two is fixedly installed at the top end of the mounting column. A rotating disintegrating plate is fixedly installed on the outer wall of the mounting ring one, and a fixed disintegrating plate is fixedly installed on the outer wall of the mounting ring two.

[0009] Furthermore, the drain pipe is shaped like a "Z", and a delivery pump is installed at the connection point between the drain pipe and the liquid outlet of the cyclone separator.

[0010] Compared with the prior art, the beneficial effects of this utility model are:

[0011] 1. Biogas and desulfurization solvent are introduced into the primary mixing pipe through the air inlet pipe and liquid inlet pipe, so that biogas and desulfurization solvent flow simultaneously. The circulating blades make the biogas and desulfurization solvent circulate during the flow, so that the biogas and desulfurization solvent are initially mixed. After mixing, they enter the secondary mixing tower for secondary mixing, so as to achieve full desulfurization of biogas.

[0012] 2. The desulfurized biogas is discharged into the power generation system through the purified gas pipe one, while the desulfurization solvent flows into the cyclone separator from the liquid outlet pipe. The cyclone separator separates the biogas mixed in with the solvent. The biogas then enters the power generation system through the purified gas pipe two, while the desulfurization solvent is discharged into the aeration tank through the liquid outlet pipe. Throughout the process, both the biogas and the desulfurization solvent are in constant flow. This means that the desulfurization solvent involved in the desulfurization process can be continuously renewed, thereby ensuring the desulfurization and purification of the biogas.

[0013] 3. By utilizing the shear force generated between the rotating and fixed dispersing plates, the mixture of biogas and desulfurization solvent flowing out from the primary mixing pipe is agitated, thereby dispersing the mixture in the secondary mixing tower and improving the mixing effect of the stirring mechanism. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This utility model Figure 1 A structural diagram of the right side view;

[0016] Figure 3This is a structural schematic diagram of the primary mixing pipe and the secondary mixing tower of this utility model in a front sectional view;

[0017] Figure 4 This is a schematic diagram of the stirring mechanism of this utility model.

[0018] In the diagram: 1. Air inlet pipe; 2. Liquid inlet pipe; 3. Primary mixing pipe; 4. Secondary mixing tower; 5. Purified gas pipe one; 6. Liquid outlet pipe; 7. Cyclone separator; 8. Purified gas pipe two; 9. Mounting column; 10. Circulating blades; 11. Stirring mechanism; 1101. Motor; 1102. Rotating shaft; 1103. Tower-shaped stirring blades; 12. Mounting ring one; 13. Rotating dispersing blade; 14. Mounting ring two; 15. Fixed dispersing blade; 16. Sealing cover; 17. Sealed bearing; 18. Liquid drain pipe; 19. Aeration tank; 20. Fluid booster pump; 21. Transfer pump. Detailed Implementation

[0019] 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. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0020] Please see Figures 1-4This utility model provides a technical solution: a high-efficiency biogas power generation pre-purification device, including a primary mixing pipe 3, the top of which is connected to a secondary mixing tower 4, the air inlet end of the primary mixing pipe 3 is connected to an air inlet pipe 1, and the liquid inlet end of the primary mixing pipe 3 is connected to a liquid inlet pipe 2. Both the air inlet pipe 1 and the liquid inlet pipe 2 are close to the bottom end of the primary mixing pipe 3. An installation column 9 is fixedly installed inside the primary mixing pipe 3, and circulating blades 10 are fixedly installed on the outer wall of the installation column 9, arranged in a spiral pattern from bottom to top. A stirring mechanism 11 is provided inside the secondary mixing tower 4. The air outlet end of the secondary mixing tower 4 is connected to a purified gas pipe 5, and the liquid outlet end of the secondary mixing tower 4 is connected to a liquid outlet pipe 6. The right end of the liquid outlet pipe 6 is connected to the input end of a cyclone separator 7. The air outlet end of the cyclone separator 7 is connected to a purified gas pipe 8, and the liquid outlet end of the cyclone separator 7 is connected to a drain pipe 18, which is located away from... One end of the cyclone separator 7 extends into the aeration tank 19. Biogas and desulfurization solvent are introduced into the primary mixing pipe 3 through the air inlet pipe 1 and the liquid inlet pipe 2, so that the biogas and desulfurization solvent flow simultaneously. The circulating blades 10 make the biogas and desulfurization solvent circulate during the flow, so that the biogas and desulfurization solvent are initially mixed. After mixing, it enters the secondary mixing tower 4 for secondary mixing, so as to achieve full desulfurization of biogas. The desulfurized biogas is discharged into the power generation system through the purification gas pipe 1 5, while the desulfurization solvent flows into the cyclone separator 7 through the liquid outlet pipe 6. The cyclone separator 7 separates the biogas mixed in it. The biogas enters the power generation system through the purification gas pipe 2 8, while the desulfurization solvent is discharged into the aeration tank 19 through the liquid outlet pipe 18. Throughout the process, both biogas and desulfurization solvent are in constant flow. That is to say, the desulfurization solvent participating in desulfurization can be continuously renewed, thereby ensuring the desulfurization and purification of biogas.

[0021] A fluid booster pump 20 is installed at the connection between the air inlet pipe 1, the liquid inlet pipe 2 and the primary mixing pipe 3. The fluid booster pump 20 pressurizes the biogas and desulfurization solvent in the air inlet pipe 1 and the liquid inlet pipe 2 to ensure that the biogas and desulfurization solvent can flow in the primary mixing pipe 3 and the secondary mixing tower 4.

[0022] The stirring mechanism 11 includes a motor 1101, which is fixedly installed on the top of the secondary mixing tower 4. A rotating shaft 1102 is fixedly installed at the output end of the motor 1101. A tower-shaped stirring blade 1103 is fixedly installed on the outer wall of the rotating shaft 1102. The tower-shaped stirring blade 1103 is located inside the secondary mixing tower 4. The motor 1101 drives the rotating shaft 1102 to rotate, which in turn drives the tower-shaped stirring blade 1103 to rotate, thereby stirring the biogas and desulfurization solvent in the secondary mixing tower 4 and allowing the biogas and desulfurization solvent to be fully mixed.

[0023] The motor 1101 has an outer cover with a sealing cover 16. The sealing cover 16 is fixedly installed on the top of the secondary mixing tower 4. The rotating shaft 1102 passes through the top of the secondary mixing tower 4 through a sealing bearing 17. The sealing bearing 17 is set to prevent biogas from leaking from the secondary mixing tower 4. The sealing cover 16 is set to form a further seal, so that even if biogas leaks from the secondary mixing tower 4, it will only enter the sealing cover 16, which can effectively prevent the problem of biogas leakage.

[0024] A mounting ring 12 is fixedly installed at the bottom of the rotating shaft 1102, and a mounting ring 14 is fixedly installed at the top of the mounting column 9. A rotating dispersing plate 13 is fixedly installed on the outer wall of the mounting ring 12, and a fixed dispersing plate 15 is fixedly installed on the outer wall of the mounting ring 14. The rotating shaft 1102 drives the mounting ring 12 to rotate, which in turn drives the rotating dispersing plate 13 to rotate. The shearing force formed between the rotating dispersing plate 13 and the fixed dispersing plate 15 agitates the mixture of biogas and desulfurization solvent flowing out of the primary mixing pipe 3, so that the mixture is dispersed in the secondary mixing tower 4, thereby improving the mixing effect of the stirring mechanism 11.

[0025] The drain pipe 18 is shaped like a "Z" to prevent the desulfurization solvent in the aeration tank 19 from flowing back into the drain pipe 18. A delivery pump 21 is installed at the connection between the drain pipe 18 and the outlet of the cyclone separator 7 to deliver the desulfurization solvent, ensuring that the desulfurization solvent can overcome gravity and enter the aeration tank 19.

[0026] Working principle: During use, biogas and desulfurization solvent are introduced into the primary mixing pipe 3 through the air inlet pipe 1 and the liquid inlet pipe 2, so that biogas and desulfurization solvent flow simultaneously. The circulating blades 10 make the biogas and desulfurization solvent circulate during the flow, so that the biogas and desulfurization solvent are initially mixed. After mixing, it enters the secondary mixing tower 4. The motor 1101 is turned on to drive the rotating shaft 1102 to rotate, which in turn drives the tower-shaped stirring blades 1103 to rotate, stirring the biogas and desulfurization solvent, so that the biogas and desulfurization solvent are fully mixed, and the biogas is fully desulfurized. The desulfurized biogas is discharged into the power generation system through the purification gas pipe 1 5, while the desulfurization solvent flows into the cyclone separator 7 through the liquid outlet pipe 6. The cyclone separator 7 separates the biogas mixed in it. The biogas enters the power generation system through the purification gas pipe 2 8, while the desulfurization solvent enters the aeration tank 19 through the liquid outlet pipe 18.

[0027] Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

Claims

1. A high-efficiency biogas power generation pre-purification device, comprising a primary mixing pipe (3), characterized in that: The top end of the first-stage mixing pipe (3) is connected to a second-stage mixing tower (4). The air inlet end of the first-stage mixing pipe (3) is connected to an air inlet pipe (1), and the liquid inlet end of the first-stage mixing pipe (3) is connected to a liquid inlet pipe (2). The air inlet pipe (1) and the liquid inlet pipe (2) are both close to the bottom end of the first-stage mixing pipe (3). An installation column (9) is fixedly installed inside the first-stage mixing pipe (3). A circulation blade (10) is fixedly installed on the outer wall of the installation column (9). The circulation blades (10) are distributed in a spiral pattern from bottom to top. A stirring mechanism (11) is arranged inside the second-stage mixing tower (4). The air outlet end of the second-stage mixing tower (4) is connected to a first purification air pipe (5), and the liquid outlet end of the second-stage mixing tower (4) is connected to a liquid outlet pipe (6). The right end of the liquid outlet pipe (6) is connected to the input end of a cyclone separator (7). The air outlet end of the cyclone separator (7) is connected to a second purification air pipe (8), and the liquid outlet end of the cyclone separator (7) is connected to a drain pipe (18). The end of the drain pipe (18) far from the cyclone separator (7) extends into an aeration tank (19).

2. The high-efficiency biogas power generation pre-purification device according to claim 1, characterized in that: A fluid booster pump (20) is arranged at the connection between the air inlet pipe (1), the liquid inlet pipe (2) and the first-stage mixing pipe (3).

3. The high-efficiency biogas power generation pre-purification device according to claim 1, characterized in that: The stirring mechanism (11) includes a motor (1101). The motor (1101) is fixedly installed on the top of the second-stage mixing tower (4). The output end of the motor (1101) is fixedly installed with a rotating shaft (1102). A tower-shaped stirring blade (1103) is fixedly installed on the outer wall of the rotating shaft (1102). The tower-shaped stirring blade (1103) is located inside the second-stage mixing tower (4).

4. The high-efficiency biogas power generation pre-purification device according to claim 3, characterized in that: The outside of the motor (1101) is covered with a sealing cover (16). The sealing cover (16) is fixedly installed on the top of the second-stage mixing tower (4). The rotating shaft (1102) passes through the top of the second-stage mixing tower (4) through a sealed bearing (17).

5. The high-efficiency biogas power generation pre-purification device according to claim 3, characterized in that: An installation ring one (12) is fixedly installed at the bottom end of the rotating shaft (1102), and an installation ring two (14) is fixedly installed at the top end of the installation column (9). A rotating dispersing piece (13) is fixedly installed on the outer wall of the installation ring one (12), and a fixed dispersing piece (15) is fixedly installed on the outer wall of the installation ring two (14).

6. The high-efficiency biogas power generation pre-purification device according to claim 1, characterized in that: The drain pipe (18) is in a shape of "Ji". A delivery pump (21) is arranged at the connection between the drain pipe (18) and the liquid outlet end of the cyclone separator (7).

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