CN201746547U - Dry fermentation biogas generation pit for rural household - Google Patents

Abstract

This utility model discloses a rural household dry fermentation biogas digester, including a fermentation tank body and a sealing structure, as well as a gas storage chamber. The sealing structure includes a plastic film placed on top of the fermentation tank body and water-sealing grooves placed around the top of the fermentation tank body, such that the edges of the plastic film are located within the sealing grooves, and the gap between the top of the fermentation tank body and the plastic film forms the gas storage chamber. This utility model reduces the pressure inside the biogas digester while ensuring a tight seal, significantly reducing biogas leakage and improving biogas utilization efficiency and safety.

Description

Rural household dry fermentation biogas digesters

technical field

The utility model relates to a methane fermentation tank in the field of biological energy, in particular to a rural household dry fermentation methane tank.

Background technique

At present, the domestic rural household biogas digesters are mainly hydraulic biogas digesters, and their main features are as follows:

1. The hydraulic biogas digester adopts the wet fermentation process, the solid content is low, and the material concentration is generally only 5-8%.

2. The body of the hydraulic biogas digester is vertical and circular, and the process of feeding and slag discharging is poor, and problems such as sand discharge at the bottom and biogas slag crusting at the top have not been solved. 3. The technical requirements for the construction of the hydraulic biogas digester are high, and the volumetric gas production rate is low. And the gas production is unbalanced, which is greatly affected by the temperature and the type of raw materials.

The dry fermentation biogas technology generally adopts the "intermittent dry fermentation" biogas technology abroad. This technology has high overall technical performance and high production efficiency, but the equipment investment is large and the operating cost is high, so its popularization and application are limited.

Chinese Patent No. "200610067579.9" discloses a continuous dry fermentation biogas generator in the present invention. Its main body is composed of a fermentation tank and a slag discharge tank. The tank body is poured with reinforced concrete, and the front section of the bottom of the fermentation tank is set as a slope. type, the rear section is flat-bottomed to increase the volume; the front end is at a lower position from the upper part to open a feed port, and the stirring wheel pusher device is connected externally; Install a slag lifting stirring wheel, and at the same time open a baffle type overflow pipe to assist slag discharging in the slag discharge tank; set up steam heating pipes in each section of the biogas tank; there is a biogas outlet above the biogas tank; The material level sight glass is set on the side, and there is a temperature tester in the pool. Although the device can be continuously produced by dry fermentation, it still has the following disadvantages: 1. The pressure in the biogas tank is relatively high, which makes the biogas in the biogas tank prone to leakage and affects normal use. 2. The sealing structure on the top of the biogas digester is complicated, and it is easy to be unsealable, and the use efficiency and safety are low. Three, the structure is complex, the cost is high, and it cannot be popularized and used in a large scale.

Utility model content

The purpose of this utility model is to overcome the above-mentioned problems existing in the existing hydraulic biogas digester and dry fermentation biogas digester, and to provide a dry fermentation biogas digester for rural households. The utility model reduces the pressure of the biogas digester under the premise of ensuring sealing , The leakage of biogas is greatly reduced, which improves the efficiency and safety of biogas use.

In order to achieve the above object, the technical scheme adopted by the utility model is as follows:

A dry fermentation biogas digester for rural households, comprising a fermentation tank body and a sealing structure, characterized in that it also includes a gas storage chamber, the sealing structure includes a plastic film arranged on the top of the fermentation tank body and a plastic film arranged around the top of the fermentation tank body A water-sealed tank, the edge of the plastic film is located in the water-sealed tank, and the gap between the top of the fermentation tank body and the plastic film forms an air storage chamber.

Hooks are evenly distributed in the water-tight groove, and the edges of the plastic film are connected with the hooks.

The cross-section of the fermentation tank body is circular, and the bottom is arc-shaped.

The water-tight groove is in the shape of a ring matching the body of the fermentation tank.

An air guide tube is arranged on the plastic film.

The diameter of the fermentation tank body is 2160mm, and the depth is 1590mm.

The advantage of adopting the utility model is:

1. In the utility model, the sealing structure includes a plastic film arranged on the top of the fermentation tank body and a water sealing groove arranged around the top of the fermentation tank body. The edge of the plastic film is located in the sealing groove to ensure the reliability of the seal. Under the premise of sealing, the pressure in the biogas digester is reduced, and the sealing effect is good. The gap between the top of the fermentation tank body and the plastic film forms a gas storage chamber, and the leakage of biogas is greatly reduced, which improves the efficiency and safety of biogas use.

2. In the utility model, there are hooks evenly distributed in the water sealing groove, and the edge of the plastic film is connected with the hooks, which not only ensures the sealing, but also makes the installation and disassembly of the plastic film easier and easier to operate.

3. In the utility model, the cross-section of the fermentation tank body is circular, and the bottom is arc-shaped, which not only ensures the fermentation rate, but also has a simple structure and is easy to manufacture.

4. In the utility model, the water sealing tank is in a ring shape matching with the fermentation tank body, and the best sealing effect can be achieved by adopting the ring shape.

5. In the utility model, the diameter of the fermentation tank body is 2160 mm, and the depth is 1590 mm. This design makes the concentration of fermentation raw materials high and the biogas output large.

6. Compared with the traditional biogas fermentation technology, the utility model does not need a large amount of water and is suitable for use in arid areas; it is convenient to feed in and out of materials, which can save a lot of labor; the concentration of fermentation raw materials is high, and the biogas output is large; in the process of anaerobic fermentation, raw materials The loss of nutrients such as N and P in the fertilizer is small, and the organic fertilizer produced has higher nutrients; the equipment is simple and the investment is low, and it is suitable for popularization and use in rural areas in my country.

Description of drawings

Fig. 1 is the utility model cross-sectional structure schematic diagram

Fig. 2 is a schematic view of the structure of the utility model in top view

The marks in the figure are: 1. fermentation tank body, 2. air storage chamber, 3. plastic film, 4. water sealing tank, 5. hook, 6. air guide tube.

Detailed ways

A dry fermentation biogas digester for rural households, comprising a fermentation tank body 1 and a sealing structure, and also includes a gas storage chamber 2, the sealing structure includes a plastic film 3 arranged on the top of the fermentation tank body 1 and a plastic film arranged on the top of the fermentation tank body 1 The surrounding water-sealed groove 4, the edge of the plastic film 3 is located in the water-sealed groove 4, and the space between the top of the fermentation tank body 1 and the plastic film 3 forms an air storage chamber 2.

In the utility model, hooks 6 are evenly distributed in the water-sealed groove 4, and the edge of the plastic film 3 is connected with the hooks 5. There are many connection modes between the plastic film 3 and the water-sealed groove 4, and this mode is the best implementation.

In the utility model, the cross-section of the fermentation tank body 1 is circular, and the bottom is arc-shaped. There are many shapes of the fermentation tank body 1. This structure is the best way, and those skilled in the art can make some technical solutions. out of shape.

In the present utility model, the water sealing tank 4 is in the shape of a ring matching the fermentation tank body 1 , that is, the shape of the water sealing tank 4 needs to match the shape of the fermentation tank body 1 . The diameter of fermentation tank body 1 is 2160mm, and depth is 1590mm, and this design is optimal mode.

In the utility model, an air guide tube 6 is arranged on the plastic film 3, which can adjust the amount of biogas in the gas storage chamber 2 and improve safety.

Obviously, those of ordinary skill in the art can also make various forms without departing from the basic technical idea of the present utility model according to the technical knowledge and conventional means they have mastered, and all the changes in these forms are included in the present utility model. within the scope of protection.

Claims (6)

1. A dry fermentation biogas digester for rural households, comprising a fermentation tank body (1) and a sealing structure, characterized in that: it also includes a gas storage chamber (2), and the sealing structure includes a fermentation tank body (1) top plastic film (3) and the water-tight groove (4) that is arranged on the top of the fermentation tank body (1), the edge of the plastic film (3) is positioned in the water-tight groove (4), and the fermentation tank body (1 ) The gap between the top and the plastic film (3) forms an air storage chamber (2). 2. The rural household dry fermentation biogas digester according to claim 1, characterized in that: hooks (5) are evenly distributed in the water-sealed groove (4), and the edges of the plastic film (3) and the hooks (5) connect. 3. The rural household dry fermentation biogas digester according to claim 1 or 2, characterized in that: the cross-section of the fermentation pond body (1) is circular, and the bottom is arc-shaped. 4. The rural household dry fermentation biogas digester according to claim 3, characterized in that: the water-sealed tank (4) is in the shape of a ring matching the fermentation tank body (1). 5. The rural household dry fermentation biogas digester according to claim 1 or 2, characterized in that: the plastic film (3) is provided with an air duct (6). 6. The rural household dry fermentation biogas digester according to claim 1 or 2, characterized in that: the diameter of the fermentation pond body (1) is 2160mm, and the depth is 1590mm.

Images