CN202181301U - Overground methane tank capable of adjusting methane pressure - Google Patents

Abstract

This utility model discloses an above-ground biogas digester with adjustable biogas pressure, including a gas storage tank (1) and a fermentation tank (6) with an inlet (2), an outlet (3), a gas outlet (4), and a water outlet (5). The gas storage tank (1) and the fermentation tank (6) are separate structures, connected by a gas pipe (7). The upper end of the gas storage tank (1) is provided with an exhaust port (8), and the lower end is placed in a water tank (8). The bottom of the gas storage tank (1) is connected to the water tank (8). This biogas digester adopts a separate fermentation tank and gas storage tank, which can adjust the biogas pressure in the gas storage tank to keep it in balance with atmospheric pressure. It can be directly formed by rolling flexible materials, so it is not limited by volume and is suitable for large-scale production and promotion. Its structure is simple, easy to manufacture, and convenient to use.

Description

An above-ground biogas digester with adjustable biogas pressure

technical field

The utility model belongs to the field of biogas production, and in particular relates to an above-ground biogas pool with adjustable biogas pressure. the

Background technique

Closed biogas digesters are now commonly used in the market to ferment organic matter into biogas, which has the advantage of cutting off the transmission of feces to transmit intestinal infectious diseases, parasitic diseases or other diseases, and reducing and controlling the pollution of the environment caused by the random discharge of feces. , is a comprehensive construction of energy, sanitation and fertilizer. At the same time, biogas slurry and biogas residue can be used for family breeding and fertilization.

However, this sealed biogas digester usually adopts the integrated structure of the fermentation tank and the gas storage room, that is, the fermentation tank and the gas storage room together form a closed space, which is usually located underground, and some organic substances are placed in this closed space, such as Straw, weeds, leaves, or human and animal manure and other wastes are fermented into biogas under certain temperature, humidity, and acidity conditions. It is often unstable due to the influence of temperature, humidity and acidity inside the fermentation tank. When the temperature, humidity and acidity are relatively moderate, the biogas in the gas storage chamber will continue to increase and the pressure will continue to increase. When the temperature, humidity and acidity are not moderate, the gas storage The amount of biogas in the chamber decreases, and the pressure also decreases, so the pressure of the biogas is very uneven, which makes it very inconvenient to use in production and life; what's more, this kind of biogas digester is located underground and is usually limited by its volume. It is complicated and not suitable for large-scale production, and the residual organic materials after fermentation and biogas production are not easy to remove, not to mention environmentally friendly, and inconvenient to maintain.

Utility model content

In view of the above disadvantages, the purpose of this utility model is to provide an above-ground biogas digester which can flexibly adjust the biogas pressure to keep it in balance and is not limited by volume.

The purpose of this utility model is achieved through such a technical solution: an above-ground biogas digester with adjustable biogas pressure, including a gas storage tank and a fermentation tank with a feed inlet, a feed outlet, an air outlet, and a water outlet, Both the gas storage tank and the fermentation tank are split structures, and the two are connected through a trachea. The upper end of the gas storage tank is provided with an exhaust port, and the lower end is placed in a pool, and the bottom of the gas storage tank is connected to the pool.

The fermentation tank is divided into three parts, including a concave tank bottom, a cylindrical tank body and a spherical tank top, wherein the upper and lower ends of the tank body are respectively overlapped with the tank top and the tank bottom and fixed by bolts. The pool is assembled from three parts, therefore, the pool bottom, pool body and pool top can be processed separately, and its manufacture and assembly are not limited by volume, and can be manufactured and assembled directly on the ground, which is suitable for large-scale production and promotion .

Since the fermentation tank is assembled from three parts, strip-shaped glass fiber yarn can be wound around the entire pool body, the joints between the pool bottom and the pool body, and the pool body and the top of the pool to enhance the strength and sealing of the above joints Sexuality, so that the fermentation tank expands and ruptures due to too much biogas pressure.

The gas storage tank is also divided into three parts, including the tank body, the tank cover and the tank bottom. The bottom of the tank is opened and placed in the pool. Fixed, therefore, the tank body, tank cover and tank bottom can be processed and shaped separately, and its manufacture and assembly are not limited by volume. Like the fermentation tank, it can also be directly manufactured and assembled on the ground, which is suitable for large-scale production and promotion.

Similarly, in order to enhance the strength and tightness of the joints between the upper and lower ends of the tank body, the tank cover and the tank bottom, strip glass fiber yarns are wrapped around the tank body, the tank body and the tank cover, and the tank body and tank bottom. .

As a further improvement of the utility model, at least two support columns are fixedly arranged at the bottom of the pool, and the gas storage tank is placed on these support columns, so that operators can conveniently enter the interior of the gas storage tank for related operations.

In order to make the organic materials mix evenly and make the fermentation process of biogas go smoothly, a stirring tank is set at the front end of the feed port.

A sewage pump is arranged between the stirring tank and the feeding port, so that the mixed organic materials in the stirring tank can better enter the fermentation tank. The front end of the feeding port is provided with a check valve, and the amount of organic materials in the fermentation tank is relatively large When appropriate, close the check valve to prevent organic materials from flowing back into the mixing tank.

The fermentation tank is made of glass fiber products curled and bonded, and its thickness is preferably greater than 2cm to increase its strength and service life; of course, the fermentation tank can also be made of other flexible materials that are easier to form according to needs and actual conditions. .

Owing to adopting above-mentioned structure, the beneficial effect of the utility model is as follows:

(1) The above-ground biogas digester provided by the utility model adopts a split fermentation tank and a gas storage tank. Therefore, the fermentation of organic materials is carried out separately from the storage of gas, so that a certain amount of biogas can be kept in the gas storage tank, effectively It prevents the organic materials in the fermentation tank from being adversely affected by temperature, humidity or acidity, resulting in low biogas production and insufficient supply, which is conducive to the smooth progress of production and life.

(2) In this utility model, the gas storage tank is placed in the pool, and its bottom is connected with the pool. Therefore, when the biogas pressure in the gas storage tank is high, the gas storage tank moves upward relative to the water pool. When the gas storage tank When the biogas pressure is low, the gas storage tank moves downward relative to the pool, thereby changing the effective space of the gas storage tank for storing biogas, so as to adjust the biogas pressure in the gas storage tank to keep it in balance with the atmospheric pressure .

(3) What's more, the manufacturing methods of the above-mentioned fermentation tanks and gas storage tanks are all assembled, and the fermentation tank includes the bottom, body and roof of the tank. No mold making is required when making the shape, and the body of the tank The production and molding can be directly formed by curling square materials, and the roof of the pool is formed by curling fan-shaped materials, such as composite glass fibers bonded by synthetic resins, so it is not limited by volume and is suitable for large-scale production and promotion. , its structure is simple and easy to use.

(4) The above-ground biogas digester provided by the utility model overcomes the inconvenience caused by placing the biogas digester underground in the prior art. Setting the biogas digester on the ground not only facilitates the maintenance of the entire biogas digester by the operator, but also The remaining or residual organic materials in the fermentation tank can also be removed from the fermentation tank conveniently from the discharge port, which is convenient for loading the next batch of organic materials. It is also very environmentally friendly and has good safety performance. the

Description of drawings

Fig. 1 is a schematic structural diagram of a biogas digester in an embodiment of the utility model.

Fig. 2 is a structural diagram after the bottom of the fermentation tank in Fig. 1 is overlapped with the body of the fermentation tank and wrapped with glass fiber yarn.

Figure 3 is a top view of the pool. the

Detailed ways

In order to understand the purpose, technical solutions and beneficial effects of the utility model more clearly, the utility model will be further described below in conjunction with the accompanying drawings, but the protection scope of the utility model is not limited to the following examples.

As shown in Figure 1, Figure 2 and Figure 3, an above-ground biogas digester with adjustable biogas pressure includes a gas storage tank 1 and a fermentation tank with a feed port 2, a feed port 3, a gas outlet 4, and a water outlet 5. Pool 6, the gas storage tank 1 and the fermentation tank 6 are both split structures, the two are connected through the air pipe 7, the upper end of the gas storage tank 1 is provided with an exhaust port 11, and the lower end is placed in the pool 8, the gas storage tank 1 The bottom communicates with the pool 8; the fermentation tank 6 is divided into three parts, including a concave pool bottom 6-1, a cylindrical pool body 6-2 and a spherical pool top 6-3, wherein the pool body 6-2 The upper and lower ends are respectively overlapped with the pool top 6-3 and the pool bottom 6-1 and fixed by bolts; the pool body 6-2, the pool bottom 6-1 and the pool body 6-2, and the pool body 6-2 and the pool top The joints of 6-3 are all wound with strip glass fiber yarn 12; the gas storage tank 1 is divided into three parts, including a tank body 1-1, a tank cover 1-2 and a tank bottom 1-3, and the tank bottom 1- 3 Open holes and place them in the pool 8. The upper and lower ends of the tank body 1-1 are respectively overlapped with the tank cover 1-2 and the tank bottom 1-3 and fixed by bolts; 1 and the tank cover 1-2, tank body 1-1 and tank bottom 1-3 are all wound with strip-shaped glass fiber yarn 12; the bottom of the pool 8 is fixed with at least two support columns 9, and the gas storage tank 1 is placed on these support columns 9; a stirring tank 10 is provided at the front end of the feed port 2; a sewage pump 13 is provided between the stirring tank 10 and the feed port 2, and a stop Return valve 14; the fermentation tank 6 and the gas storage tank 1 are glass fiber products, the thickness of which is greater than 2cm.

And, the biogas digester can be produced and assembled through the following steps:

The first step: forming of fermentation tank 6:

First, the pool body 6-2 is formed, that is, the square base is made of glass fiber cloth and synthetic resin, and then the square base is crimped and fixedly connected into a cylindrical shape through a shaping mold;

Next, carry out the molding of the pool bottom 6-1, that is, bond the glass fiber cloth according to the diameter of the cylindrical pool body 6-2, and curl its edge upwards to overlap and fix with the pool body 6-2;

Carry out the molding of pool top 6-3 then, promptly according to the diameter of cylindrical pool body 6-2, glass fiber cloth is bonded into spherical shape;

Then the formed pool body 6-2, pool top 6-3 and pool bottom 6-1 are overlapped and fixed with bolts, and the above pool body 6-2, pool body 6-2 and pool top 6-3 and The junction of the pool body 6-2 and the bottom of the pool 6-1 is wound with a strip glass fiber yarn 12 by a winding machine;

The second step: set up the air outlet 4 on the pool top 6-3, set up the feed port 2, the feed port 3 and the water outlet 5 on the pool body 6-2, and assemble the feed port 2 with a check valve 14 Connect to the mixing pool 10 after the sewage pump 13, wherein, the water outlet 5 is opened in the middle and upper part of the pool body 6-2;

The third step: Forming of the gas storage tank 1: adopt the same method as the first step to form the gas storage tank 1, and then open the connection port of the air pipe 7 and the exhaust port 11 on the top of the gas storage tank 1, and the bottom of the tank 1 -3 openings;

Step 4: Pouring two or more support columns 9 in the pool 8;

Step 5: Connect the fermentation tank 6 with the air storage tank 1 with the air pipe 7, pour water into the water pool 8, and finally place the air storage tank 1 on the support column 9 in the water pool 8.

The working principle of the above-ground biogas digester is: after the above-ground biogas digester is installed in place, the uniformly mixed organic materials in the mixing tank 10 are pumped into the fermentation tank 6 through the sewage pump 13, and the temperature, humidity, acidity and Other related conditions make these organic materials ferment, and the biogas produced by fermentation floats in the top 6-3 of the fermentation tank and is transported to the gas storage tank 1 through the air pipe 7. When there is more biogas in the gas storage tank 1, the pressure is higher , the gas storage tank 1 moves upward relative to the water pool 8, and since the bottom of the gas storage tank 1 communicates with the water pool 8, the effective area for storing biogas in the gas storage tank 1 increases, thereby reducing the biogas pressure, and vice versa. Biogas pressure, and then the biogas pressure in the gas storage tank 1 is always in balance with the atmospheric pressure.

Claims (9)

1. the ground methane-generating pit of an adjustable biogas pressure; Comprise gas-holder (1) and have the fermentation vat (6) of opening for feed (2), discharge port (3), air outlet (4), water outlet (5); It is characterized in that: said gas-holder (1) is split-type structural with fermentation vat (6), and both are communicated with through tracheae (7), and the upper end of gas-holder (1) is provided with venting port (11); The lower end places pond (8), and the bottom of gas-holder (1) is communicated with pond (8).

2. ground as claimed in claim 1 methane-generating pit; It is characterized in that: said fermentation vat (6) is divided into three parts; Comprise (6-1) at the bottom of the spill pond, tubular pond body (6-2) and dome shape Chi Ding (6-3); Wherein, the two ends up and down of pond body (6-2) overlap with Chi Ding (6-3) He Chidi (6-1) respectively and pass through bolt.

3. ground as claimed in claim 2 methane-generating pit is characterized in that: (6-1) all twines strip glass fiber yarn (12) with pond body (6-2) and pond body (6-2) with the junction of Chi Ding (6-3) at the bottom of pond body (6-2), pond.

4. like claim 1,2 or 3 described ground methane-generating pits; It is characterized in that: said gas-holder (1) is divided into three parts; Comprise can body (1-1), cover (1-2) and jar end (1-3); Jar end (1-3) perforate also places pond (8), and the two ends up and down of can body (1-1) overlap with cover (1-2) and a jar end (1-3) respectively and pass through bolt.

5. ground as claimed in claim 4 methane-generating pit is characterized in that: all twine strip glass fiber yarn (12) with cover (1-2) and can body (1-1) with jar (1-3) junction, the end at can body (1-1), can body (1-1).

6. ground as claimed in claim 5 methane-generating pit is characterized in that: the bottom of said pond (8) fixedly installs at least 2 pillar stiffeners (9), and said gas-holder (1) places on these pillar stiffeners (9).

7. ground as claimed in claim 6 methane-generating pit is characterized in that: the front end at opening for feed (2) is provided with agitated pool (10).

8. ground as claimed in claim 7 methane-generating pit is characterized in that: be provided with sump pump (13) between said agitated pool (10) and the opening for feed (2), the front end of opening for feed (2) is provided with vacuum breaker (14).

9. ground as claimed in claim 8 methane-generating pit is characterized in that: said fermentation vat (6) and gas-holder (1) are fiberglass products.

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