A biogas holder collecting tank

Abstract

The utility model relates to a kind of biogas gas cabinet water collecting tank, including water collecting tank body, water injection pipe, drain pipe and at least one long introduction pipe;The top of water injection pipe is connected with the water collecting tank body, and water injection valve is provided on water injection pipe;The bottom of drain pipe is connected with the water collecting tank body, and drain valve is provided on drain pipe;The bottom in water collecting tank body is equipped with water to form water seal area, and the top of water seal area is gas phase area;One end of long introduction pipe is inserted into water collecting tank body and into water seal area, and the other end of long introduction pipe is used to connect each condensate water drain pipe of biogas system;The utility model reduces the water collecting tank or dry-type drain or water seal drain of each low point in biogas treatment system by draining each point and collecting into water collecting tank through long introduction pipe, reduces investment, in addition, water collecting tank is closed system, can prevent biogas escape, avoid toxic gas harm personal health, eliminate the security risk of biogas condensate water system.

Description

Technical Field

[0001] This utility model relates to the technical field of condensate collection equipment, specifically to a biogas gas holder water collection tank. Background Technology

[0002] Wastewater treatment plants, landfills, and solid waste treatment projects generate large amounts of organic wastewater. This organic wastewater can be anaerobicly fermented to produce biogas. Anaerobic fermentation is classified by temperature into ambient temperature fermentation, mesophilic fermentation, and thermophilic fermentation. Water vapor in the anaerobic digester easily mixes with the biogas and is carried into the biogas pipeline. In mesophilic and thermophilic anaerobic reactions, the biogas has a high saturated water content. Before biogas enters downstream users such as boilers, generators, and municipal gas pipelines, it needs to undergo purification treatment such as desulfurization. Condensate is generated in the biogas purification pipeline system and gas holders. To avoid affecting the normal operation of the system, the condensate needs to be collected and discharged. Currently, conventional treatment methods include installing drain valves, using a combination of water-sealed drainers and sludge tanks for collection and discharge, or using dry drainers for collection and discharge.

[0003] The following problems exist in the conventional collection and discharge methods of biogas condensate: (1) In large-scale biogas treatment systems, the biogas pipeline system is complex, with many low points and many discharge points. If dry drainers are used, more drainers need to be installed, which increases the labor intensity of workers, the difficulty of process piping, and the investment of the project. (2) Using water seal drainers requires the installation of a water collection tank, which requires long-term storage of sewage with a strong odor and a large production area. On the other hand, water seal drainers require a high water seal height. When there is no water in the water seal, biogas can easily enter the atmosphere, posing a significant safety hazard. Utility Model Content

[0004] Based on the above description, this utility model provides a biogas gas holder water collection tank. By collecting the drainage from various points into the water collection tank, it reduces the need for water collection tanks, dry drainers, or water seal drainers at various low points in the biogas treatment system, thereby reducing investment. In addition, the water collection tank is a closed system, which can prevent biogas from escaping, avoid toxic gases from harming human health, and eliminate the safety hazards of biogas condensate systems.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A biogas gas holder water collection tank includes a water collection tank body, a water injection pipe, a drain pipe, and at least one long inlet pipe; one end of the water injection pipe is connected to the top of the water collection tank body, and a water injection valve is provided on the water injection pipe; one end of the drain pipe is connected to the bottom of the water collection tank body, and a drain valve is provided on the drain pipe; water is installed at the bottom of the water collection tank body to form a water seal zone, and a gas phase zone is located above the water seal zone; one end of the long inlet pipe extends into the water collection tank body and into the water seal zone, and the other end of the long inlet pipe is used to connect to various condensate drain pipes of the biogas system.

[0006] Based on the above technical solution, the present invention can be further improved as follows.

[0007] Furthermore, it includes at least three of the aforementioned long inlet pipes, wherein at least one of the long inlet pipes is used to connect the condensate drain pipe of the gas holder and the condensate drain manifold of the gas holder outlet pipe, wherein at least one of the long inlet pipes is used to connect the condensate drain pipe at the low point of the anaerobic digester to the gas holder section, and wherein at least one of the long inlet pipes is used to connect the condensate drain pipe at the low point of the biogas treatment system.

[0008] Furthermore, the long inlet pipe includes a first horizontal pipe and a first vertical pipe. The first horizontal pipe penetrates the upper part of the side wall of the water collection tank body. The top end of the first vertical pipe is connected to the end of the first horizontal pipe located inside the water collection tank body through a first elbow. The bottom end of the first vertical pipe extends into the water seal area.

[0009] Furthermore, at least one of the long inlet pipes is connected to each condensate drain pipe of the biogas system via a water storage pipe; the top end of the water storage pipe is used to connect to each condensate drain pipe of the biogas system, and the bottom end of the water storage pipe is connected to the end of the first horizontal pipe located outside the main body of the water collection tank; a first valve and a second valve are provided on the water storage pipe, and a water storage area is formed between the first valve and the second valve.

[0010] Furthermore, it also includes a short inlet pipe, which includes a second horizontal pipe and a second vertical pipe. The second horizontal pipe penetrates the upper part of the side wall of the water collection tank body. The top end of the second vertical pipe is connected to the end of the second horizontal pipe located inside the water collection tank body via a second elbow. The bottom end of the second vertical pipe is located in the gas phase zone. The end of the second horizontal pipe located outside the water collection tank body is connected to the condensate drain pipe of the gas holder inlet pipe via at least one normally open valve.

[0011] Furthermore, it also includes a vent pipe, one end of which is connected to the top of the water collection tank body, and a vent valve is provided on the vent pipe.

[0012] Furthermore, it also includes a reserved inlet pipe, which includes a third horizontal pipe, a third vertical pipe, and a nitrogen purging pipe. The third horizontal pipe penetrates the upper part of the side wall of the water collection tank body. The top end of the third vertical pipe is connected to the end of the third horizontal pipe located inside the water collection tank body through a third elbow. The bottom end of the third vertical pipe extends into the water seal area. The bottom end of the nitrogen purging pipe is connected to the part of the third horizontal pipe located outside the water collection tank body.

[0013] Furthermore, it also includes a suction pipe, one end of which is connected to a drain pump, and the other end extends from the top of the water collection tank body into the water collection tank body and into the water seal area.

[0014] Furthermore, it also includes a level gauge, one end of which is connected to the water seal zone, and the other end of which is connected to the gas phase zone.

[0015] Compared with the prior art, the technical solution of this application has the following beneficial technical effects: 1. This utility model reduces investment by collecting drainage from various points into a water collection tank and eliminating the need for water collection tanks, dry drainers, or water seal drainers at various low points in the biogas treatment system. 2. The water collection tank of this utility model is a closed system, which can prevent biogas from escaping, avoid toxic gases from harming human health, and eliminate the safety hazards of biogas condensate system. 3. By setting up an automatic rice feeding system to connect the long inlet pipe and the various condensate drain pipes of the biogas system, and the short inlet pipe is connected to the condensate drain pipe of the gas holder inlet pipe through at least one normally open valve, the condensate at each drainage point can flow into the collection tank by gravity, eliminating the need for manual operation of the drainage equipment at each drainage point on a regular basis, thus reducing the labor intensity of workers. 4. By setting a short inlet pipe to connect the gas phase zone inside the water collection tank to the gas phase space of the gas holder, the pressure difference between the gas phase zone inside the water collection tank and the pipeline is reduced, thereby lowering the water level required for the water seal zone to achieve a water seal and ensuring a good water seal effect. Attached Figure Description

[0016] Figure 1 A schematic diagram of the structure of a biogas gas holder water collection tank provided in this embodiment of the utility model; Figure 2 This is a top view of the water collection tank body in an embodiment of the present utility model; Figure 3 This is a schematic diagram of the long inlet pipe at a location with relatively small condensate volume in an embodiment of this utility model; Figure 4 This is a schematic diagram of the long inlet pipe at the location with a large amount of condensate in this embodiment of the present invention; Figure 5This is a schematic diagram of the short inlet tube in an embodiment of the present invention; Figure 6 This is a schematic diagram of the structure of the reserved inlet pipe in an embodiment of this utility model; The attached diagram lists the components represented by each number as follows: 1. Water collection tank body; 11. Manhole; 12. Water seal area; 13. Gas phase area; 2. Water injection pipe; 3. Water suction pipe; 4. Vent pipe; 5. Drain pipe; 6. Level gauge; 7. Long inlet pipe; 71. First horizontal pipe; 72. First vertical pipe; 73. First elbow; 74. Water storage pipe; 741. First valve; 742. Second valve; 743. Water storage area; 8. Short inlet pipe; 81. Second horizontal pipe; 82. Second vertical pipe; 83. Second elbow; 84. Normally open valve; 9. Reserved inlet pipe; 91. Third horizontal pipe; 92. Third vertical pipe; 93. Third elbow; 94. Nitrogen purging pipe. Detailed Implementation

[0017] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0018] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0019] When used herein, the singular forms of “a,” “an,” and “the” may also include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising,” “including,” or “having,” etc., specify the presence of the stated feature, whole, step, operation, component, part, or combination thereof, but do not preclude the possibility of the presence or addition of one or more other feature, whole, step, operation, component, part, or combination thereof.

[0020] A biogas holder water collection tank includes a tank body 1, a water injection pipe 2, a water suction pipe 3, a vent pipe 4, a drain pipe 5, a level gauge 6, a short inlet pipe 8, a reserved inlet pipe 9, and multiple long inlet pipes 7. A manhole 11 for maintenance is provided on the side wall of the tank body 1, and water is installed at the bottom of the tank to form a water seal zone 12, with a gas phase zone 13 formed above the water seal zone 12.

[0021] Specifically, the long inlet pipe 7 includes a first horizontal pipe 71 and a first vertical pipe 72. The first horizontal pipe 71 penetrates the upper part of the side wall of the water collection tank body 1. The top end of the first vertical pipe 72 is connected to the end of the first horizontal pipe 71 located inside the water collection tank body 1 through a first elbow 73. The bottom end of the first vertical pipe 72 extends into the water seal area 12. In this embodiment, the water collection tank includes three long inlet pipes 7. One long inlet pipe 7 is used to connect the condensate drain pipe of the gas holder and the condensate drain of the gas outlet pipe of the gas holder to the main condensate drain pipe. Another long inlet pipe 7 is used to connect the condensate drain pipe at the low point of the anaerobic digester to the gas holder section. The last long inlet pipe 7 is used to connect the condensate drain pipe at the low point of the biogas treatment system.

[0022] For parts with a large amount of condensate, such as Figure 3 As shown, the first horizontal pipe 71 is connected to the condensate drain pipe of the biogas system through a valve at one end outside the water collection tank body 1, and the condensate enters the water collection pipe body 1 by gravity flow using a normally open method.

[0023] For portions with smaller condensate volume, such as Figure 4 As shown, the first horizontal pipe 71 is connected to the condensate drain pipe of the biogas system through a water storage pipe 74 at one end outside the water collection tank body 1, and the condensate enters the water collection pipe body 1 by periodically opening the gravity flow.

[0024] In this embodiment, the top end of the water storage pipe 74 is used to connect to each condensate drain pipe of the biogas system, and the bottom end of the water storage pipe is connected to the end of the first horizontal pipe 71 located outside the water collection tank body 1; a first valve 741 and a second valve 742 are provided on the water storage pipe 74, the first valve 741 is located above the second valve 742, and a water storage area 743 is formed between the first valve 741 and the second valve 742.

[0025] Normally, the first valve 741 is opened and the second valve 742 is closed to collect condensate from the condensate drain pipe in the water storage area 743. Periodically, the first valve 741 is closed first, then the second valve 742 is opened to discharge the collected condensate in the water storage area 743 into the water collection tank body 1. After the periodic discharge is completed, the second valve 742 is closed first, then the first valve 741 is opened again to collect condensate in the water storage area 743. This embodiment, by using a periodic opening and gravity flow method for the water storage pipe 74, ensures the discharge of condensate from areas with small condensate volumes and further ensures the isolation of areas with small condensate volumes.

[0026] The short inlet pipe 8 includes a second horizontal pipe 81 and a second vertical pipe 82. The second horizontal pipe 81 penetrates the upper part of the side wall of the water collection tank body 1. The top end of the second vertical pipe 82 is connected to the end of the second horizontal pipe 81 located inside the water collection tank body 1 via a second elbow 83. The bottom end of the second vertical pipe 82 is located in the gas phase zone 13. The end of the second horizontal pipe 81 located outside the water collection tank body 1 is connected to the condensate drain pipe of the gas holder inlet pipe via two normally open valves 84. When operators enter the water collection tank body 1 for maintenance, the two normally open valves 84 are closed to isolate the water collection tank body 1 from the gas holder. The two normally open valves 84 also meet the safety isolation requirements for flammable gases.

[0027] In this embodiment, by setting a normally open valve 84, condensate at the lowest point of the gas holder inlet pipe can flow into the water collection tank by gravity. Furthermore, the short inlet pipe 8 connects the gas phase zone 13 within the water collection tank body 1 to the gas phase space of the gas holder, reducing the pressure difference between the gas phase zone 13 and the pipeline within the water collection tank body 1. This lowers the water level required for the water seal zone 12 to achieve a water seal, ensuring a good water seal effect.

[0028] The reserved inlet pipe 9 includes a third horizontal pipe 91, a third vertical pipe 92, and a nitrogen purging pipe 94. The third horizontal pipe 91 penetrates the upper part of the side wall of the water collection tank body 1. The top end of the third vertical pipe 92 is connected to the end of the third horizontal pipe 91 located inside the water collection tank body 1 via a third elbow 93. The bottom end of the third vertical pipe 92 extends into the water seal zone 12. The bottom end of the nitrogen purging pipe 94 is connected to the portion of the third horizontal pipe 91 located outside the water collection tank body 1. If necessary, the reserved inlet pipe 9 can be used as an additional condensate inlet pipe. In addition, nitrogen can be introduced into the water collection tank body 1 through the nitrogen purging pipe 94 for nitrogen replacement, replacing the biogas in the water collection tank body 1 with nitrogen.

[0029] The water seal zone 12 is filled with water to isolate the bottom ends of the long inlet pipe 7, the short inlet pipe 8, and the reserved inlet pipe 9, ensuring effective isolation between the gas phases of the biogas treatment system and preventing gas leakage from affecting the normal operation of the system. To ensure a good water seal effect, in this embodiment, the liquid level in the water seal zone 12 is at least 500 mm higher than the bottom ends of the long inlet pipe 7, the short inlet pipe 8, and the reserved inlet pipe 9.

[0030] One end of the water injection pipe 2 is connected to the top of the water collection tank body 1. The water injection pipe 2 is equipped with a water injection valve, which is used to inject the water required by the water seal zone 12 into the water collection tank body 1. It can also be used to inject water into the water collection tank body 1 to clean the inside of the water collection tank body 1.

[0031] One end of the suction pipe 3 is connected to the drain pump, and the other end extends from the top of the water collection tank 1 into the water collection tank 1 and into the water seal zone 12. When the water level in the water collection tank 1 is too high, the drain pump can be started to discharge the excess water through the suction pipe 3. One end of the level gauge 6 is connected to the water seal zone 12, and the other end of the level gauge 6 is connected to the gas phase zone 13, which is used to monitor the water level in the water collection tank 1 in real time.

[0032] One end of the vent pipe 4 is connected to the top of the water collection tank body 1. The vent pipe 4 is equipped with a vent valve, which can discharge the biogas that enters the water collection tank body 1 through the short inlet pipe 8.

[0033] One end of the drain pipe 5 is connected to the bottom of the water collection tank body 1. The drain pipe 5 is equipped with a drain valve to drain all the water in the water collection tank body 1.

[0034] This embodiment reduces investment by collecting drainage from various points into a collection tank and eliminating the need for condensate tanks, dry drainers, or water-sealed drainers at low points within the biogas treatment system. Furthermore, the collection tank in this embodiment is a closed system, preventing biogas escape, avoiding the harm of toxic gases to human health, and eliminating the safety hazards of biogas condensate systems.

[0035] This embodiment also connects the long inlet pipe 7 and each condensate drain pipe of the biogas system by setting up an automatic discharge system, and the short inlet pipe 8 is connected to the condensate drain pipe of the gas holder inlet pipe through at least one normally open valve 84. Both the long inlet pipe 7 and the short inlet pipe 8 are lower than each condensate drain point of the biogas system, so that the condensate at each drain point can flow into the water collection tank by gravity, eliminating the need for manual operation of the drainage equipment at each drain point periodically, thus reducing the labor intensity of workers.

[0036] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A biogas holder water collection tank, characterized in that, The system includes a water collection tank body, a water injection pipe, a drain pipe, and at least one long inlet pipe. One end of the water injection pipe is connected to the top of the water collection tank body, and a water injection valve is installed on the water injection pipe. One end of the drain pipe is connected to the bottom of the water collection tank body, and a drain valve is installed on the drain pipe. Water is installed at the bottom of the water collection tank body to form a water seal zone, and a gas phase zone is located above the water seal zone. One end of the long inlet pipe extends into the water collection tank body and into the water seal zone, and the other end of the long inlet pipe is used to connect to the various condensate drain pipes of the biogas system.

2. A biogas gas holder water collection tank according to claim 1, characterized in that, It includes at least three of the aforementioned long inlet pipes, wherein at least one of the aforementioned long inlet pipes is used to connect the condensate drain pipe of the gas holder and the condensate drain manifold of the gas holder outlet pipe, wherein at least one of the aforementioned long inlet pipes is used to connect the condensate drain pipe at the low point of the anaerobic digester to the gas holder section, and wherein at least one of the aforementioned long inlet pipes is used to connect the condensate drain pipe at the low point of the biogas treatment system.

3. A biogas holder water collection tank according to claim 1, characterized in that, The long inlet pipe includes a first horizontal pipe and a first vertical pipe. The first horizontal pipe penetrates the upper part of the side wall of the water collection tank body. The top end of the first vertical pipe is connected to the end of the first horizontal pipe located inside the water collection tank body through a first elbow. The bottom end of the first vertical pipe extends into the water seal area.

4. A biogas gas holder water collection tank according to claim 3, characterized in that, At least one of the long inlet pipes is connected to each condensate drain pipe of the biogas system through a water storage pipe; the top end of the water storage pipe is used to connect to each condensate drain pipe of the biogas system, and the bottom end of the water storage pipe is connected to the end of the first horizontal pipe located outside the main body of the water collection tank; a first valve and a second valve are provided on the water storage pipe, and a water storage area is formed between the first valve and the second valve.

5. A biogas gas holder water collection tank according to claim 1, characterized in that, It also includes a short inlet pipe, which includes a second horizontal pipe and a second vertical pipe. The second horizontal pipe passes through the upper part of the side wall of the water collection tank body. The top end of the second vertical pipe is connected to the end of the second horizontal pipe located inside the water collection tank body through a second elbow. The bottom end of the second vertical pipe is located in the gas phase zone. The end of the second horizontal pipe located outside the water collection tank body is connected to the condensate drain pipe of the gas holder inlet pipe through at least one normally open valve.

6. A biogas gas holder water collection tank according to claim 5, characterized in that, It also includes a vent pipe, one end of which is connected to the top of the water collection tank body, and a vent valve is provided on the vent pipe.

7. A biogas gas holder water collection tank according to claim 1, characterized in that, It also includes a reserved inlet pipe, which includes a third horizontal pipe, a third vertical pipe and a nitrogen purging pipe. The third horizontal pipe penetrates the upper part of the side wall of the water collection tank body. The top end of the third vertical pipe is connected to the end of the third horizontal pipe located inside the water collection tank body through a third elbow. The bottom end of the third vertical pipe extends into the water seal area. The bottom end of the nitrogen purging pipe is connected to the part of the third horizontal pipe located outside the water collection tank body.

8. A biogas gas holder water collection tank according to claim 1, characterized in that, It also includes a water suction pipe, one end of which is connected to a drain pump, and the other end extends from the top of the water collection tank body into the water collection tank body and into the water seal area.

9. A biogas holder water collection tank according to claim 1, characterized in that, It also includes a level gauge, one end of which is connected to the water seal zone and the other end of which is connected to the gas phase zone.

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