CN201148430Y - a digester - Google Patents

Abstract

The utility model discloses a biogas pool. The biogas pool includes a pool body and a vault. The vault is arranged on the upper part of the pool body. A manhole is arranged on the top of the vault. The upper end of the sleeve is sealed and installed on the manhole, the lower end of the sleeve faces the bottom of the pool body, and an air duct communicating with the interior of the biogas tank is also provided on the vault. The sealing structure is simple, no maintenance is required, and the sealing effect is good.

Description

a digester

technical field

The utility model relates to a biogas pool, in particular to the vault structure of the biogas pool.

Background technique

As a new energy source, biogas is widely used in rural areas due to its environmental protection and recycling characteristics. The biogas collected from the biogas digester is carried out by connecting the gas pipeline on the movable cover on the vault of the biogas digester, and there is a manhole at the top of the vault, so that the movable cover with the gas pipeline installed can be installed on the vault, and the biogas is sealed It will flow out from the air duct. In the past, the movable cover on the biogas digester was sealed with loess or clay (choose high-quality loess with strong viscosity, dried and crushed, removed stones and other impurities with a sieve, and mixed with water to form tile mud), and then filled with water at the manhole. . Because the sealing effect of the sealing soil is limited, air bubbles and partial blackening of the sealing soil often appear at the manhole, so the sealing performance of such a biogas digester is poor, and the movable cover needs to be replaced frequently during use. Dirt and add enough water.

Utility model content

The technical problem to be solved by the utility model is to provide a biogas pool with a simple sealing structure, no maintenance and good sealing effect.

In order to solve the above technical problems, the utility model adopts the following technical scheme: the biogas tank includes a pool body and a vault, the vault is arranged on the upper part of the pool body, a manhole is provided on the top of the vault, and a There is a through-type sleeve, the upper end of the sleeve is sealed and installed on the manhole, the lower end of the sleeve faces the bottom of the pool body, and an air duct communicating with the interior of the biogas tank is also provided on the vault.

As the first improvement of the utility model, in order to make the connection between the sleeve and the vault more firm, a flange is provided on the outside of the upper end of the sleeve.

As the second improvement of the present invention, the connection between the sleeve and the vault is also made firmer, and the upper end of the sleeve is in a shape whose radius increases sequentially from bottom to top.

As the third improvement of the present utility model, the connection between the sleeve and the vault is also made more firm, and the outside of the upper end of the sleeve is provided with a concave-convex connection surface. As a preference for this improvement, the concave-convex connection surface is zigzag or wavy.

The utility model adopts the above-mentioned technical scheme. When working, the fermentation feed liquid inside the biogas tank is filled with the sleeve, so that the biogas released from the fermentation feed liquid outside the sleeve is isolated from the inside of the sleeve, so that the liquid formed by the fermentation feed liquid in the biogas tank Seal, so that the gas inside and outside the sleeve is isolated, and it has a good sealing effect. When the air pressure in the biogas digester reaches a certain value and the liquid level line outside the sleeve exceeds the bottom of the cylinder, the biogas in the pond can escape from the sleeve to play a pressure-limiting role. At the same time, it can also feed and discharge materials from the sleeve, and put them into the stirring device, which is convenient for stirring and is conducive to improving the gas production rate. Because the sleeve extends under the liquid surface in the pool, it can play the role of breaking the scum on the liquid surface in the pool.

Description of drawings

Below in conjunction with accompanying drawing and specific embodiment, the utility model is described further in detail.

Fig. 1 is a schematic diagram of the external structure of a biogas digester of the utility model;

Fig. 2 is a schematic diagram of a vault structure of a biogas digester of the present invention;

Fig. 3 is a schematic structural view of an embodiment of a sleeve of a biogas digester of the present invention;

Fig. 4 is a structural schematic diagram of two embodiments of a sleeve of a biogas digester of the present invention;

Fig. 5 is a structural schematic view of three embodiments of a sleeve of a biogas digester of the present invention;

Fig. 6 is a structural diagram of four embodiments of a sleeve of a biogas digester of the present invention.

Detailed ways

As shown in FIG. 1 , the biogas digester includes a pool body 1 and a dome 2 , the dome 2 is arranged on the top of the pool body 1 , and the pool body 1 and the dome 2 are sealed and connected. As shown in Figure 2, there is a manhole 3 on the top of the vault 2. The cross-section of the manhole 3 is stepped, and the openings are successively reduced. A through-type sleeve 4 is sealed and connected to the smallest diameter of the manhole 3. The sleeve 4 is up and down. The two ends are connected; the vault 2 is also provided with an air duct 5 communicating with the interior of the biogas tank, because the biogas will gather on the top of the vault 2, so the position of the air duct 5 is close to the manhole 3, and the interior of the vault 2 should The air duct 5 is flat with the inner wall of the vault 2 . The upper end of the sleeve 4 is fixed on the vault 2, and the lower end faces the bottom of the pool body 1. As shown in FIG. 3 , a flange 6 is provided on the outside of the upper end of the sleeve 4 . Because the sleeve 4 is heavy, the added flange 6 can better fix the sleeve 4 and the dome 2 together. Also make the sleeve 4 more firmly connected with the vault 2, as shown in Figure 4, the upper end of the sleeve 4 is in the shape of increasing radius from bottom to top; A concave-convex connection surface is provided, and the concave-convex connection surface is zigzag, or as shown in FIG. 6 , the concave-convex connection surface is wavy. A movable cover 7 is also installed at the manhole 3 to prevent personnel from falling into it.

When working, the fermentation feed liquid inside the biogas tank is full of the sleeve 4, so that the biogas released from the fermentation feed liquid outside the sleeve 4 is isolated from the inside of the sleeve 4, so that the sleeve is formed by the liquid seal formed by the fermentation feed liquid in the biogas tank. 4 Internal and external gas isolation, play a very good sealing effect. When the air pressure in the biogas digester reaches a certain value and the liquid level line outside the sleeve 4 exceeds the bottom of the cylinder, the biogas in the digester can escape from the sleeve 4 to play a pressure-limiting role. At the same time, the material can be fed and discharged from the sleeve 4, and a stirring device can be put into it to facilitate stirring and improve the gas production rate. Because the sleeve 4 stretches under the liquid surface in the pool, it can play the role of breaking the liquid surface scum in the pool.

Claims (5)

1. A biogas digester, the biogas digester includes a pond body (1) and a vault (2), the vault (2) is set on the upper part of the pond body (1), and the top of the vault (2) is provided with a man The hole (3) is characterized in that: the vault (2) is provided with a through-type sleeve (4), and the upper end of the sleeve (4) is sealed and installed on the manhole (3), and the sleeve ( 4) The lower end faces the bottom of the pool body (1), and the vault (2) is also provided with an air duct (5) communicating with the interior of the biogas tank. 2. The biogas digester according to claim 1, characterized in that a flange (6) is provided outside the upper end of the sleeve (4). 3. The biogas digester according to claim 1, characterized in that: the upper end of the sleeve (4) has a shape whose radius increases sequentially from bottom to top. 4. The biogas digester according to claim 1, characterized in that: the outside of the upper end of the sleeve (4) is provided with a concave-convex connecting surface. 5. The biogas digester according to claim 4, characterized in that: the concave-convex connecting surface is zigzag or wavy.

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