CN201292360Y - Strong-return current hydraulic sludge gas pot without movable cover plate - Google Patents

Abstract

The utility model relates to a strong backflow water pressure biogas tank without movable cover, which comprises a tank body, a tank neck, a fermentation room in the middle and lower part of the tank body, a gas storage chamber in the upper part of the tank body, and a water pressure tank in the upper part of the tank body A feed pipe and a small discharge pipe are arranged on both sides of the tank body, a central pipe is arranged at the center of the tank body, the upper part of the central pipe is connected with the tank neck, and the lower part of the central pipe extends below the water level line of the material in the fermentation room. A circulating overflow pipe is provided between the water pressure tank and the feed pipe to communicate the water pressure tank with the feed pipe. The utility model does not produce air leakage phenomenon, and can directly feed or discharge materials through the central tube. When the biogas in the gas storage chamber presses the water onto the water pressure tank, when the air pressure is too high, the water enters the feed pipe through the circulation overflow pipe and flows back to the fermentation room, which can make the raw materials in the fermentation room flow and play a stirring role , which is conducive to fermentation and gas production.

Description

Strong backflow water pressure biogas tank without movable cover

technical field

The utility model relates to a biogas tank, in particular to a strong backflow hydraulic pressure type biogas tank without movable cover.

Background technique

Biogas has been used in vast rural areas for several years, and the raw materials for biogas fermentation are mainly human and animal manure. Human and animal manure and other materials are nitrogen-rich raw materials, which are characterized by short fermentation cycles and fast gas production. In the past, biogas digesters were generally built with brick and concrete structures. Due to many problems in the amount of gas produced, seasons of use and many technical aspects, they have not been popularized for a long time. There is a new type of biogas tank using inorganic composite fiberglass material as the body of the biogas pool. This is a water pressure biogas tank, as shown in Figure 1, its working principle is: water pressure gas, air pressure water. When biogas is not used, the gas transmission switch is closed. The biogas in the gas storage chamber accumulates more and more. When the pressure of the biogas is greater than the atmospheric pressure, the fermentation liquid in the fermentation chamber is pressed into the water pressure tank, the liquid level in the fermentation chamber drops, and the liquid level in the water pressure tank rises. This process is called air pressure. Water; when the gas transmission switch is turned on to use gas, the fermentation liquid in the water pressure tank flows back to the fermentation chamber, and the biogas is pressed out, which is called hydraulic gas; when the biogas pressure is equal to the high pressure, the pressure difference disappears, and the output of biogas basically stops. After feeding the water pressure type biogas tank, the movable cover needs to be sealed according to the requirements, and special attention should be paid to sealing the skylight to prevent air leakage. The existing hydraulic biogas tank of 8 cubic meters has the following problems after being used by farmers:

1: When sealing the cover after adding the material, improper use of the sealing material will cause the movable cover to not be tightly sealed and cause air leakage;

2: After the water in the water storage ring is evaporated, the sealing cement is dry and cracked, causing air leakage;

3: After the movable cover plate leaks, the biogas leakage will cause a lot of troubles. It is necessary to lift the movable cover plate again to apply the sealing glue.

4. The raw materials in the fermentation room are in a static state, which is not conducive to fermentation and gas production.

Utility model content

Aiming at the above-mentioned problems in the prior art, the utility model provides a strong backflow water pressure biogas tank without a movable cover that does not need a movable cover, does not cause biogas leakage, can make the raw materials in the fermentation room flow, and is beneficial to fermentation and gas production. .

The technical scheme adopted by the utility model to achieve its purpose is: a strong backflow water pressure biogas tank without a movable cover, including a tank body, a tank neck, and the middle and lower parts of the tank body are fermentation rooms, and the upper part of the tank body is a gas storage chamber. The upper part of the tank body is provided with a water pressure tank, and the two sides of the tank body are provided with a feed pipe and a small discharge pipe. Extend below the water level of the material in the fermentation room.

A circulating overflow pipe is provided between the water pressure tank and the feed pipe to communicate the water pressure tank with the feed pipe.

The beneficial effect of the utility model is that no air leakage will occur, and the material can be directly fed or discharged through the central tube. When the biogas in the gas storage chamber presses the water into the water pressure tank, when the air pressure is too high, the water enters the feed pipe through the circulation overflow pipe and flows back to the fermentation room, which can make the raw materials in the fermentation room flow and play a stirring role. , which is conducive to fermentation and gas production.

Description of drawings

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

Fig. 1 is the schematic diagram of existing hydraulic type biogas tank;

Fig. 2 is a schematic diagram of the utility model.

Detailed ways

Referring to Fig. 2, the utility model is a strong backflow water pressure biogas tank without movable cover, which includes a tank body 15, a tank neck 16, a fermentation room 1 in the middle and lower part of the tank body, and a gas storage chamber 2 in the upper part of the tank body. The top of the tank body is provided with a water pressure tank 4, the tank body both sides are provided with feed pipe 8 and small discharge pipe 10, water pressure tank connecting pipe 9 and air guide pipe 12. A water pressure tank cover plate 11 is arranged on the small discharge nozzle 10 . The central position in the tank is provided with a central tube 13, the upper part of the central tube 13 is closely connected with the inner mouth of the tank neck 16, the central tube and the tank neck are cast as a whole, the tank mouth is covered with a wellhead cover plate 7, and the lower part of the central tube 13 extends to Below the water level line 3 of the material in the fermentation room 1, it can reach the center of the tank body (the material refers to the mixture of fermented human and animal manure and water, usually added to two-thirds of the tank body). A circulating overflow pipe 14 is provided between the water pressure tank 4 and the feed pipe 8 , so that the water pressure tank 4 communicates with the feed pipe 8 . The utility model improves the prior art in structure, and the main improvement is to replace the movable cover plate 5 and the water storage ring 6 in Fig. 1 with the central tube 13. In addition, a circulation overflow pipe 14 is added.

The material of the utility model can adopt inorganic composite glass fiber reinforced plastics, and its weight is light, and the spherical tank of making 8 cubic meters only weighs about 200 kilograms, is convenient to transport and install. It has high strength and certain elasticity, and is not easy to be squeezed by frozen soil. The anti-aging performance and corrosion resistance are also very good. It can resist the corrosion of various organic acids, various corrosive gases and organic solvents in the biogas digester. Generally, it does not need maintenance, and its service life can be as long as more than 20 years. In addition, it has good air tightness and heat insulation, and a high gas production rate. The research and application results show that the biogas tank made of inorganic composite FRP material has good sealing performance, no water seepage and air leakage, its thermal conductivity is 1.42kj/(m.h.), and the gas production rate and gas storage capacity can be increased by about 30%. The best shape of the utility model is a sphere, and shapes such as a cube or a cuboid can also be adopted.

Claims (2)

1. Strong backflow water pressure biogas tank without movable cover, including the tank body, tank neck, the middle and lower part of the tank body is the fermentation room, the upper part of the tank body is the gas storage room, and the upper part of the tank body is equipped with a water pressure tank. A feed pipe and a small discharge pipe are provided on the side, and the feature is that a central pipe is provided at the center of the tank body, the upper part of the central pipe is connected to the inner mouth of the tank neck, and the lower part of the central pipe extends below the water level line of the material in the fermentation room. 2. The strong backflow water pressure biogas tank without movable cover according to claim 1, characterized in that a circulating overflow pipe is set between the water pressure tank and the feed pipe, so that the water pressure tank and the feed pipe The tube is connected.

Images