Desulfurizing tower for biogas treatment

Abstract

The utility model discloses a desulfurizing tower for biogas treatment, which relates to the field of biogas treatment and comprises a tower body, a silk screen is arranged in the tower body along the horizontal direction, a desulfurizing cavity is formed between the upper part of the silk screen and an inner cavity of the tower body, a support rod for supporting the silk screen is arranged below the silk screen, and a gas inlet pipe is arranged below the support rod. The end, away from the inner cavity of the tower body, of the gas inlet pipe penetrates through the inner wall of the tower body and then is communicated with a biogas source, a gas outlet is formed in the top of the tower body, and a feeding port is formed in the side face of the gas outlet; according to the utility model, the feeding port is positioned at the top of the tower body, so that a desulfurizing agent can be filled into the whole desulfurizing cavity, the available space is utilized to the maximum extent, the effective volume is increased to be close to the theoretical maximum value, and the processing capacity of a single desulfurizing tower is obviously improved; to-be-treated biogas enters the tower body through the gas inlet pipe and then moves upwards, so that the contact time and the contact area of the to-be-treated biogas and the desulfurizing agent are remarkably improved, and the desulfurization efficiency is greatly improved.

Description

Technical Field

[0001] The utility model relates to the field of biogas treatment, in particular to a desulfurization tower for biogas treatment. Background Art

[0002] As a renewable energy source, biogas plays a vital role in energy utilization and environmental protection. However, biogas often contains harmful components such as hydrogen sulfide, which not only corrodes equipment and degrades fuel quality, but also poses a threat to the environment and human health. Therefore, biogas desulfurization has become a critical step in its utilization. Currently, common desulfurization methods include dry desulfurization and wet desulfurization. Dry desulfurization, which typically uses solid desulfurizers such as iron oxide, offers advantages such as ease of operation and zero wastewater discharge.

[0003] Dry desulfurization towers achieve desulfurization through a chemical reaction or physical adsorption of a solid desulfurizer with hydrogen sulfide in biogas. During operation, biogas enters the tower from the bottom or side and passes through a mesh screen evenly coated with desulfurizer. During this process, hydrogen sulfide comes into contact with the desulfurizer and reacts, forming stable sulfides or being adsorbed. The purified biogas is then discharged from the top of the tower.

[0004] The feed port for solid desulfurization in existing dry desulfurization towers is typically located on the side of the tower. This location limits the effective filling range of the desulfurization agent. Consequently, the desulfurization agent can only be filled in the space between the feed port and the wire mesh. This directly wastes a large amount of potential effective space in the upper part of the tower. The desulfurization agent cannot be filled to the top of the tower, significantly reducing the effective volume of the tower for the desulfurization reaction. Utility Model Content

[0005] The purpose of the utility model is to provide a desulfurization tower for biogas treatment, which solves the problem in the prior art that the feed port for filling solid desulfurizer in existing dry desulfurization towers is usually located on the side of the tower body. The location of the side feed port limits the effective filling range of the desulfurizer. As a result, the desulfurizer can only be filled in the space between the feed port and the wire mesh, which directly wastes a large amount of potential effective space in the upper part of the tower body, and the desulfurizer cannot be filled to the top of the tower body, which significantly reduces the effective volume actually used for desulfurization reaction in the tower.

[0006] The technical solution adopted by the utility model is as follows: a desulfurization tower for biogas treatment, comprising a tower body, a wire mesh is arranged horizontally inside the tower body, a desulfurization chamber is formed between the wire mesh and the inner cavity of the tower body, a support rod for supporting the wire mesh is arranged below the wire mesh, an air inlet pipe is arranged below the support rod, an end of the air inlet pipe away from the inner cavity of the tower body passes through the inner wall of the tower body and is connected to a biogas source, an air outlet is arranged on the top of the tower body, and a feeding port is arranged on the side of the air outlet.

[0007] Furthermore, the ratio between the diameter of the tower body and the height of the tower body is 1:1.1 to 1:1.5.

[0008] Furthermore, a discharge port is provided above the wire mesh on the side of the tower body.

[0009] Furthermore, a filter is provided below the air outlet.

[0010] Furthermore, the cross-section of the filter screen is trapezoidal.

[0011] Furthermore, an inspection port is provided on the side of the air outlet.

[0012] Furthermore, a sewage pipe is provided at the bottom of the tower body.

[0013] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0014] 1. In the present invention, since the feeding port is located at the top of the tower body, the desulfurizer can fill the entire desulfurization chamber, thereby maximizing the use of available space, increasing the effective volume to close to the theoretical maximum value, and significantly increasing the processing capacity of a single desulfurization tower. Due to the increase in the height of the desulfurizer bed, the biogas to be treated moves upward after entering the tower body through the air inlet pipe, and the contact time and area with the desulfurizer are significantly increased, greatly improving the desulfurization efficiency;

[0015] 2. The ratio between the diameter and height of the tower body in the present invention is 1:1.1 to 1:1.5. The above ratio enables the tower body to have a larger cross-section, which is conducive to the uniform distribution of biogas. Although the gas flow path is shortened, the height of the desulfurizer bed is increased by setting the feeding port at the top of the tower body, which still does not reduce the desulfurization capacity of the desulfurization tower.

[0016] 3. In the utility model, a discharge port is provided above the wire mesh on the side of the tower body to facilitate the discharge of inactivated desulfurizer, and a filter is provided below the gas outlet to prevent desulfurizer particles from flowing out of the tower with the biogas flow, thereby improving the gas quality. The cross-section of the filter is trapezoidal, which can increase its contact area with the treated biogas and more effectively capture fine desulfurizer particles and other impurities.

[0017] 4. When entering the tower body through the discharge port for inspection and maintenance, in order to prevent the desulfurizer from reacting with the air after being released, an inspection port is provided on the side of the air outlet to facilitate drainage into the tower body through the inspection port, isolating the desulfurizer from contact with the air;

[0018] 5. Although the desulfurization tower of the present invention is a dry desulfurization tower, a small amount of liquid, such as condensed water or reaction by-products, may still be generated during operation. The liquid accumulated at the bottom of the tower body not only causes the desulfurizer to become moist and agglomerated, but may also be corrosive and cause corrosion to the tower body. Therefore, a drain pipe is provided at the bottom of the tower body to discharge the liquid discharged into the tower body through the inspection port and the liquid accumulated at the bottom of the tower body on a daily basis. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural diagram of the present utility model.

[0020] Description of reference numerals:

[0021] 1. Tower body; 2. Air inlet pipe; 3. Drain pipe; 4. Discharge port; 5. Feed port; 6. Air outlet; 7. Filter; 8. Inspection port; 9. Wire mesh; 10. Support rod. DETAILED DESCRIPTION

[0022] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0024] Example 1

[0025] Figure 1 As shown: A desulfurization tower for biogas treatment includes a tower body 1, a wire mesh 9 is arranged horizontally inside the tower body 1, a desulfurization chamber is formed between the top of the wire mesh 9 and the inner cavity of the tower body 1, a support rod 10 for supporting it is arranged below the wire mesh 9, an air inlet pipe 2 is arranged below the support rod 10, and the end of the air inlet pipe 2 away from the inner cavity of the tower body 1 passes through the inner wall of the tower body 1 and is connected to the biogas source, an air outlet 6 is arranged on the top of the tower body 1, and a feeding port 5 is arranged on the side of the air outlet 6.

[0026] The desulfurizer is fed into the tower body 1 through the feeding port 5 and laid on the surface of the wire mesh 9 to form a bed. Since the feeding port 5 is located at the top of the tower body 1, the desulfurizer is allowed to fill the entire desulfurization cavity, thereby maximizing the use of the available space, so that the effective volume is increased to close to the theoretical maximum value, and the processing capacity of a single desulfurization tower is significantly increased. Due to the increase in the height of the desulfurizer bed, the biogas to be treated enters the tower body 1 through the air inlet pipe 2 and moves upward, and the contact time and area with the desulfurizer are significantly improved, which greatly improves the desulfurization efficiency.

[0027] In addition, the ratio between the diameter of the tower body 1 and the height of the tower body 1 is 1:1.1 to 1:1.5. The above ratio enables the tower body 1 to have a larger cross-section, which is conducive to the uniform distribution of biogas. Although the gas flow path will be reduced, the feeding port 5 is set at the top of the tower body 1, so that the height of the desulfurizer bed is increased, which still does not reduce the desulfurization capacity of the desulfurization tower.

[0028] Example 2

[0029] The difference between this embodiment and embodiment 1 is that a discharge port 4 is provided on the side of the tower body 1 above the wire mesh 9 to facilitate the discharge of the inactivated desulfurizer, and a filter screen 7 is provided below the gas outlet 6 to prevent the desulfurizer particles from flowing out of the tower with the biogas flow, thereby improving the gas quality, and the cross-section of the filter screen 7 is trapezoidal, which can increase its contact area with the treated biogas and more effectively capture fine desulfurizer particles and other impurities.

[0030] Example 3

[0031] The difference between this embodiment and embodiment 1 is that when entering the tower body 1 through the discharge port 4 for inspection and maintenance, in order to prevent the desulfurizer from reacting with the air after being released, an inspection port 8 is provided on the side of the air outlet 6 to facilitate the discharge of water into the tower body 1 through the inspection port 8, thereby isolating the desulfurizer from contact with the air.

[0032] At the same time, although it is a dry desulfurization, a small amount of liquid, such as condensed water or reaction by-products, may still be generated during operation. The liquid accumulated at the bottom of the tower body 1 not only causes the desulfurizer to become moist and agglomerated, but may also be corrosive and cause corrosion to the tower body 1. Therefore, a drain pipe 3 is provided at the bottom of the tower body 1 to discharge the liquid discharged into the tower body 1 through the inspection port 8 and the liquid accumulated at the bottom of the tower body 1 on a daily basis.

[0033] Obviously, the above-described embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the manner in which the present invention is to be implemented. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A desulfurization tower for biogas treatment, characterized in that: The invention comprises a tower body (1), wherein a wire mesh (9) is provided inside the tower body (1), a desulfurization chamber is formed between the upper portion of the wire mesh (9) and the inner cavity of the tower body (1), an air inlet pipe (2) is provided below the wire mesh (9), an end of the air inlet pipe (2) away from the inner cavity of the tower body (1) passes through the inner wall of the tower body (1) and is connected to a biogas source, an air outlet (6) is provided at the top of the tower body (1), and a feeding port (5) is provided on the side of the air outlet (6).

2. A desulfurization tower for biogas treatment according to claim 1, characterized in that: The ratio between the diameter of the tower body (1) and the height of the tower body (1) is 1:1.1 to 1:1.

5.

3. A desulfurization tower for biogas treatment according to claim 2, characterized in that: A discharge port (4) is provided on the side of the tower body (1) above the wire mesh (9).

4. A desulfurization tower for biogas treatment according to claim 3, characterized in that: A filter screen (7) is provided below the air outlet (6).

5. A desulfurization tower for biogas treatment according to claim 4, characterized in that: The cross section of the filter screen (7) is trapezoidal.

6. A desulfurization tower for biogas treatment according to claim 5, characterized in that: An inspection port (8) is provided on the side of the air outlet (6).

7. A desulfurization tower for biogas treatment according to claim 6, characterized in that: A sewage pipe (3) is provided at the bottom of the tower body (1).

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