Safety pressure maintaining device for biogas collection and storage

Abstract

The invention belongs to the technical field of environmental protection, and discloses a biogas collection and storage safety pressure maintaining device which comprises a collection pool, a liquid storage pool and a pressure regulating module, the collection pool is connected with the pressure regulating module through a first intercommunication pipe, the liquid storage pool is connected with the pressure regulating module through a second intercommunication pipe, and the pressure regulating module comprises a pressure regulating pipe communicating the first intercommunication pipe and the second intercommunication pipe. According to the safe pressure maintaining device for biogas collection and storage provided by the invention, the liquid level in the collection tank is increased or decreased according to the change of the air pressure in the collection tank, so that the liquid in the collection tank and the liquid in the liquid storage tank flow mutually, and the stability of the air pressure in the collection tank is realized.

Description

Technical Field

[0001] The invention belongs to the technical field of environmental protection, and in particular relates to a biogas collection, storage and safety pressure-maintaining device. Background Art

[0002] In the existing biogas production system, people usually use gas bags or gas tanks to collect and store the biogas generated by the biogas digester. During the collection and storage process, the pressure of the gas bag is unstable, and the normal and safe use is affected by strong winds, heavy snow and other weather conditions. The maintenance cost is high, and the gas bag cannot be collected and stored while working. As the gas tank is used, the pressure gradually decreases, posing a safety hazard. Summary of the invention

[0003] The present invention aims to solve the above technical problems at least to a certain extent. To this end, the present invention aims to provide a biogas collection, storage and pressure-maintaining device.

[0004] The technical solution adopted by the present invention is:

[0005] A biogas collection and storage safety pressure-maintaining device comprises a collection tank, a liquid storage tank and a pressure regulating module. The collection tank is connected to the pressure regulating module via a first interconnecting pipe, the liquid storage tank is connected to the pressure regulating module via a second interconnecting pipe, and the pressure regulating module comprises a pressure regulating pipe connecting the first interconnecting pipe and the second interconnecting pipe.

[0006] Preferably, the height of the pressure regulating pipe is greater than the height of the top of the collecting tank and the top of the liquid storage tank. There are multiple pressure regulating pipes, each of which is provided with a pressure regulating valve, and the height of each pressure regulating pipe is different.

[0007] Preferably, the end of the first interconnecting pipe located in the collecting tank is located below the liquid level inside the collecting tank. The end of the first interconnecting pipe located in the collecting tank is arranged close to the inner bottom of the collecting tank.

[0008] Preferably, the end of the second intercommunication pipe located in the liquid reservoir is located below the liquid level in the liquid reservoir. The end of the second intercommunication pipe located in the liquid reservoir is arranged close to the inner bottom of the liquid reservoir.

[0009] Preferably, the collection tank is connected to the biogas tank through an air inlet channel. The collection tank is provided with an air outlet channel. The liquid storage tank is provided with a gas channel.

[0010] The beneficial effects of the present invention are:

[0011] The present invention provides a biogas collection and storage safety pressure-maintaining device, in which the liquid level in the collection tank rises or falls according to the change of the air pressure in the collection tank, thereby causing the liquid in the collection tank and the liquid in the storage tank to flow mutually, thereby achieving the stability of the air pressure in the collection tank, ensuring the safety of biogas use, and solving the problem of unstable pressure in the existing biogas collection and storage. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the biogas collection, storage and safety pressure maintaining device in the first embodiment.

[0013] Figure 2 It is a schematic diagram of the biogas collection, storage and safety pressure maintaining device in the second embodiment.

[0014] Figure 3 It is a schematic diagram of the biogas collection, storage and safety pressure maintaining device in the third embodiment.

[0015] Figure 4 It is a schematic diagram of the biogas collection, storage and safety pressure maintaining device in the fourth embodiment.

[0016] Figure 5 It is a schematic diagram of the biogas collection, storage and safety pressure maintaining device in the fifth embodiment.

[0017] Figure 6 It is a schematic diagram of the biogas collection, storage and safety pressure maintaining device in the sixth embodiment.

[0018] Figure 7 It is a schematic diagram of a biogas collection, storage and safety pressure maintaining device in another embodiment.

[0019] In the figure: 1-collecting tank; 2-liquid storage tank; 3-first interconnecting pipe; 4-second interconnecting pipe; 5-pressure regulating pipe; 6-pressure regulating valve; 7-air inlet channel; 8-air outlet channel; 9-gas channel; 10-partition; 11-connecting pipe. DETAILED DESCRIPTION

[0020] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and are not to be construed as limiting the present invention. The components of the embodiments of the present invention generally described and shown in the drawings herein may be arranged and designed in a variety of different configurations.

[0021] In the present invention, unless otherwise clearly stipulated and limited, terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal connection of two elements.

[0022] Embodiment 1

[0023] like Figure 1As shown, a biogas collection and storage safety pressure-maintaining device of the present embodiment includes a collection tank 1, a liquid storage tank 2 and a pressure regulating module. The collection tank 1 is connected to the pressure regulating module through a first interconnecting pipe 3, and the liquid storage tank 2 is connected to the pressure regulating module through a second interconnecting pipe 4. The pressure regulating module includes a pressure regulating pipe 5 connecting the first interconnecting pipe 3 and the second interconnecting pipe 4. Among them, one end of the first interconnecting pipe 3 located in the collection tank 1 is located below the liquid level inside the collection tank 1, and one end of the second interconnecting pipe 4 located in the liquid storage tank 2 is located below the liquid level inside the liquid storage tank 2. The pressure regulating pipe 5 is arranged horizontally, and the height of the pressure regulating pipe 5 is greater than the height of the top inside the collection tank 1, and the height of the pressure regulating pipe 5 is also greater than the height of the top inside the liquid storage tank 2.

[0024] The collecting tank 1 is connected with the biogas tank through the air inlet channel 7, and the collecting tank 1 is provided with an air outlet channel 8, and the liquid storage tank 2 is provided with a gas channel 9. As the biogas generated by the biogas tank is continuously fed into the collecting tank 1, the air pressure of the collecting tank 1 is continuously increased, the liquid level of the collecting tank 1 is reduced, and the gas storage capacity is increased. The liquid in the collecting tank 1 is transported to the pressure regulating pipe 5 through the first interconnecting pipe 3 under the action of the air pressure, and then is transported to the liquid storage tank 2 through the second interconnecting pipe 4. The liquid in the liquid storage tank 2 increases, the liquid level rises, and the air in the liquid storage tank 2 is discharged from the gas channel 9.

[0025] When using biogas, the biogas in the collection tank 1 is output from the gas outlet channel 8, the air pressure in the collection tank 1 decreases, and the liquid in the liquid storage tank 2 enters the collection tank 1 through the second interconnecting pipe 4, the pressure regulating pipe 5 and the first interconnecting pipe 3 in sequence, the liquid in the collection tank 1 increases, the liquid level rises, and the gas storage volume decreases, so that the air pressure in the collection tank 1 remains unchanged or changes little. When the liquid in the liquid storage tank 2 flows back into the collection tank 1, the liquid storage tank 2 takes in air through the gas channel 9.

[0026] The liquid level in the collection tank 1 rises or falls according to the change of the air pressure in the collection tank 1, thereby causing the liquid in the collection tank 1 and the liquid in the storage tank 2 to flow mutually, thereby achieving the stability of the air pressure in the collection tank 1 and ensuring the safe use of biogas.

[0027] In this embodiment, one end of the first interconnecting pipe 3 located in the collecting tank 1 is arranged close to the inner bottom of the collecting tank 1, and the distance between the lower end of the first interconnecting pipe 3 and the inner bottom of the collecting tank 1 is 0.1-0.4 meters. One end of the second interconnecting pipe 4 located in the liquid storage tank 2 is arranged close to the inner bottom of the liquid storage tank 2, and the distance between the lower end of the second interconnecting pipe 4 and the inner bottom of the liquid storage tank 2 is 0.1-0.4 meters.

[0028] In this embodiment, the liquid storage tank 2 is installed above the collecting tank 1 , so that the air pressure in the collecting tank 1 can be higher. A higher air pressure is required to allow the liquid in the collecting tank 1 to enter the liquid storage tank 2 .

[0029] Embodiment 2

[0030] like Figure 2As shown, the biogas collection and storage safety pressure-maintaining device of this embodiment is based on the first embodiment, and four pressure-regulating pipes 5 are arranged. Each pressure-regulating pipe 5 is provided with a pressure-regulating valve 6. The pressure-regulating pipes 5 are arranged in parallel, and the height of each pressure-regulating pipe 5 is different. By opening the pressure-regulating valves 6 on the pressure-regulating pipes at different heights, the pressure change of the pressure regulating module can be achieved, that is, when the pressure-regulating valve of the pressure-regulating pipe at a certain height is opened, the other pressure-regulating valves are closed, and by changing the height of the connected pressure-regulating pipes, the air pressure of the liquid in the collection tank 1 pressed into the liquid storage tank 2 is also changed accordingly.

[0031] Embodiment 3

[0032] like Figure 3 As shown, the biogas collection and storage safety pressure maintaining device of this embodiment is based on the second embodiment, and the liquid storage tank 2 is installed on one side of the collection tank 1. Compared with the liquid storage tank 2 installed above the collection tank 1, only a smaller air pressure is required to allow the liquid in the collection tank 1 to enter the liquid storage tank 2.

[0033] Embodiment 4

[0034] like Figure 4 As shown, the biogas collection and storage safety pressure maintaining device of this embodiment is based on the second embodiment, and a partition 10 is arranged in the collection tank 1. The partition 10 separates an area in the collection tank 1 for placing liquid, and the lower end of the first interconnecting pipe 3 is located in the area. This arrangement is suitable for collection tanks 1 with larger areas.

[0035] Embodiment 5

[0036] like Figure 5 As shown, the biogas collection and storage safety pressure maintaining device of this embodiment is different from that of the first embodiment only in the specific setting of the pressure regulating pipe 5. In this embodiment, the height of the pressure regulating pipe 5 is not related to the height of the top of the collection tank 1 and the height of the top of the liquid storage tank 2. It is only necessary to ensure that the connecting pressure regulating pipe 5 can connect the first interconnecting pipe 3 and the second interconnecting pipe 4.

[0037] Embodiment 6

[0038] like Figure 6 As shown, the biogas collection and storage safety pressure-maintaining device of this embodiment includes a collection tank 1, a liquid storage tank 2 and a connecting pipe 11. The collection tank 1 and the liquid storage tank 2 are connected by the connecting pipe 11. One end of the connecting pipe 11 is located below the liquid level inside the collection tank 1, and the other end is located below the liquid level inside the liquid storage tank 2, that is, the first interconnecting pipe, the second interconnecting pipe and the pressure regulating pipe 5 together constitute the connecting pipe 11, and the air pressure in the collection tank 1 is regulated by the connecting pipe 11.

[0039] It should be noted that in the above embodiments, the collection tank 1 and the liquid storage tank 2 can be installed underground according to actual use needs, or can be installed on the ground, or partially installed below the ground. The collection tank 1 and the liquid storage tank 2 can be designed as two connected tank bodies (such as Figure 7 As shown), it can also be two separately designed tank bodies.

[0040] It should be noted that the liquid storage tank 2 can be designed as a sealed tank structure, and the gas channel 9 is the air hole of the sealed tank structure. The liquid storage tank 2 can also be designed as an open type (such as Figure 7 As shown), the open outlet is the gas channel.

[0041] The present invention is not limited to the above-mentioned optional implementation modes. Anyone can derive other various forms of products or similar products under the inspiration of the present invention. However, no matter what changes are made in the shape or structure, all technical solutions that fall within the scope defined by the claims of the present invention fall within the protection scope of the present invention.

Claims

1. A biogas collection, storage and safety pressure-maintaining device, characterized in that: The invention comprises a collecting tank (1), a liquid storage tank (2) and a pressure regulating module, wherein the collecting tank (1) is connected to the pressure regulating module via a first interconnecting pipe (3), the liquid storage tank (2) is connected to the pressure regulating module via a second interconnecting pipe (4), and the pressure regulating module comprises a pressure regulating pipe (5) connecting the first interconnecting pipe (3) and the second interconnecting pipe (4).

2. The biogas collection, storage and pressure-maintaining device according to claim 1 is characterized in that: The height of the pressure regulating pipe (5) is greater than the height of the top of the collection tank (1) and the top of the liquid storage tank (2).

3. The biogas collection, storage and pressure-maintaining device according to claim 1 or 2, characterized in that: There are a plurality of pressure regulating pipes (5), each of which is provided with a pressure regulating valve (6), and each of which has a different height.

4. The biogas collection, storage and pressure-maintaining device according to claim 1 is characterized in that: One end of the first interconnecting pipe (3) located inside the collection tank (1) is located below the liquid level inside the collection tank (1).

5. The biogas collection, storage and pressure-maintaining device according to claim 1 or 4, characterized in that: One end of the first interconnecting pipe (3) located inside the collecting tank (1) is arranged close to the inner bottom of the collecting tank (1).

6. The biogas collection, storage and pressure-maintaining device according to claim 1 is characterized by: One end of the second interconnecting pipe (4) located inside the liquid storage tank (2) is located below the liquid level inside the liquid storage tank (2).

7. The biogas collection, storage and pressure-maintaining device according to claim 1 or 6, characterized in that: One end of the second interconnecting pipe (4) located inside the liquid storage tank (2) is arranged close to the inner bottom of the liquid storage tank (2).

8. The biogas collection, storage and pressure-maintaining device according to claim 1 is characterized by: The collection tank (1) is connected to the biogas tank via an air intake channel (7).

9. The biogas collection, storage and pressure-maintaining device according to claim 1, characterized in that: The collecting pool (1) is provided with a gas outlet channel (8).

10. The biogas collection, storage and pressure-maintaining device according to claim 1, characterized in that: The liquid storage tank (2) is provided with a gas channel (9).

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