CN210831430U - A device for transporting biogas over long distances at low cost - Google Patents

Abstract

The utility model relates to a long-distance and low-cost device for transporting biogas, comprising a biogas tank, a septic tank, a water pond and a gas collecting hood. , and a branch pipe is arranged on the connecting pipe to transport it to the user. The utility model only needs to use the existing abandoned biogas tank or septic tank, and the biogas can be transported in a long distance and at a low cost, which is not only safe and environmentally friendly, but also has economic benefits.

Description

A device for transporting biogas over long distances at low cost

technical field

The utility model belongs to the field of resource utilization and environmental protection, in particular to a device for long-distance and low-cost transportation of biogas.

Background technique

Biogas: It is a combustible gas produced by microbial fermentation of organic matter in an anaerobic environment under certain conditions of temperature, humidity and pH. Since this gas was originally found in swamps, lakes, and ponds, it is called biogas. Biogas is a mixed gas whose main component is methane, followed by carbon dioxide, hydrogen sulfide (H ₂ S), ammonia and other components. In the composition of biogas, combustible components include gases such as methane, hydrogen sulfide, carbon monoxide and heavy hydrocarbons; non-combustible components include gases such as carbon dioxide, nitrogen and ammonia.

The state supports the development of biogas, but for decades the state has invested huge funds in the construction of household, combined household and medium-sized biogas digesters mostly abandoned! The reason: the rural prime-age laborers go out to work, and the biogas digesters are not maintained; the population at home is small, and the domestic pigs are also small, so there is no manure raw material to maintain the biogas digesters.

The aquaculture industry is developing towards centralization and large-scale development, and the manure raw materials required by biogas digesters have not decreased. Due to the environmental protection needs of large-scale farms, some owners have invested in the construction of large-scale biogas digesters at their own expense. However, these large-scale biogas digesters are far away from the villagers' residential areas, generally more than 2 kilometers. The cost of the pipelines is high, resulting in most of the generated biogas being vented, which not only pollutes the air but also wastes energy.

Utility model content

The purpose of the utility model is to provide a long-distance and low-cost biogas transportation device with low cost and convenient operation. The technical feature of the method for long-distance and low-cost transportation of biogas of the present invention is that the large-scale biogas tank with the output pressure of biogas p is connected to its surroundings as much as possible, especially the biogas tank and the septic tank that are discarded at the user end of the long-distance conveying biogas pipeline, and are connected to the network. At the position of h=p/ρgm below the liquid surface of the pond near the user end of the long-distance biogas pipeline, build a gas tank with a height of not exceeding h=p/ρg-0.3m for storing biogas.

The concrete technical scheme of the present utility model is as follows:

A device for long-distance and low-cost transportation of biogas, comprising a biogas tank, a septic tank, a pond, and a gas collecting hood. A branch pipe is arranged on the upper part to be transported to the user;

The biogas tank is a traditional biogas tank, which is composed of a fermentation room, a gas storage room, a feeding port, and a feeding port;

The septic tank is composed of a first-level anaerobic room, a second-level anaerobic room, a third-level anaerobic room, a feed port, and a material discharge port. oxygen chamber;

The pond is made by using the existing pond around the residents or manually dug according to the needs;

The gas collecting hood is covered on the liquid surface of the pond, and the biogas is collected by the drainage gas collecting method, and the gas collecting hood constitutes a gas storage tank.

The beneficial effects of the present utility model are:

If a pipe with a diameter of 50mm is required according to the current technology, the cost is 10 yuan/m, and the utility model only needs a pipe with a diameter of 16mm, the cost is less than 2 yuan/m, and the cost is reduced to less than 1/5. This is because during the peak gas consumption period of less than 1 hour, when the gas supply of large-scale biogas digesters is in short supply, the end-of-life biogas digesters, septic tanks and gas cabinets of the toilet revolution that can be connected to the user end can supply gas, which greatly reduces long-distance transportation. Mains pressure. In the low-peak period of gas consumption, gas can be continuously supplied to the scrapped biogas digesters, septic tanks and gas cabinets of the toilet revolution for 24 hours. In theory, compared with the existing technology, the cross-sectional area of the main conveying pipeline can be reduced by 24 times. It not only reduces the cost of long-distance transportation, but also reduces the investment threshold.

Although the raw materials of the scrapped biogas tank and the toilet revolution septic tank are insufficient, there are still some raw materials, and the biogas produced by it can also be used, reducing waste. It is also possible to use long-distance biogas pipelines to transport biogas slurry to the scrapped biogas digester at night, so that the scrapped biogas digester can operate normally. Avoid the impact on the environment caused by the use of manure trucks to pull materials.

The utility model only needs to use the existing abandoned biogas tank or septic tank, and the biogas can be transported in a long distance and at a low cost, which is not only safe and environmentally friendly, but also has economic benefits.

Description of drawings

The present utility model will be further described below with reference to the accompanying drawings and specific embodiments.

Fig. 1 is the overall structure schematic diagram of the present utility model;

In the picture: 1 traditional biogas digester, 2 fermentation room, 3 gas storage room, 4 feed inlet, 5 feed outlet, 6 septic tank, 7 first-level anaerobic room, 8 second-level anaerobic room, 9 third-level anaerobic room Oxygen chamber, 10 baffle holes, 11 inlet, 12 outlet, 13 pond, 14 gas collecting hood.

Detailed ways

Example:

As shown in Figure 1, a method and device for long-distance and low-cost transportation of biogas, including a biogas tank 1, a septic tank 6, a pond 13, and a gas collecting hood 14, the biogas tank 1, the septic tank 6, and the gas collecting hood 14 is connected to the large-scale biogas digester through a connecting pipe, and a branch pipe is arranged on the connecting pipe to be transported to the user, and a control valve is arranged on the connecting pipe and the branch pipe.

The biogas tank 1 is a traditional biogas tank, consisting of a fermentation room 2, a gas storage room 3, a feed port 4, and a material outlet 5;

The septic tank 6 is composed of a first-level anaerobic chamber 7, a second-level anaerobic chamber 8, a third-level anaerobic chamber 9, a feeding port 11, and a feeding port 12. Each anaerobic chamber is separated by a partition, and the The plate hole 10 enters the next anaerobic chamber;

The pond 13 is made by using the existing ponds around the residents or manually dug according to needs;

The gas collecting hood 14 is covered on the liquid surface of the pond, and the biogas is collected by the drainage gas collecting method.

How to use the utility model:

In step 1, the excess biogas from the large-scale biogas digester is passed into the traditional biogas digester 1 for storage;

Step 2, the excess biogas of the large-scale biogas tank is passed into the septic tank 6 for storage;

In step 3, the excess biogas from the large-scale biogas digester is passed into the pond 13 and stored in the gas collecting hood 14;

Step 4: Connect three gas gathering devices in series for use by surrounding users. The pressure from the large biogas digester is p=xρg=yρg=zρg, where x, y, and x represent the storage capacity of the biogas digester, septic tank, and pond, respectively. The maximum water pressure height between the air, ρ is the density of water.

When the user does not need gas or uses less gas, the large-scale biogas digester can pass the biogas into the gas collecting hood 14 of the traditional biogas digester 1, septic tank 6 and water pond 13 for storage under the condition of ensuring the gas supply pressure. When the peak gas consumption is reached, the long-distance transportation pipeline of the large-scale biogas digester causes insufficient gas supply due to the small diameter of the pipe. At this time, the traditional biogas digester 1, septic tank 6 and gas collecting hood 14 can be connected to the pipeline network for gas supply to alleviate the gas supply. air pressure. At the same time, raw materials can still be added to the traditional biogas tank 1 and septic tank 6 for continuous utilization, so as to reduce waste.

Claims (1)

1. The utility model provides a device of long distance low-cost transport marsh gas, includes methane-generating pit, septic tank, pond, gas collecting channel, its characterized in that: the methane tank, the septic tank and the gas collecting hood are connected with the large methane tank through connecting pipelines, and branch pipes are arranged on the connecting pipelines and are used for conveying the methane tank, the septic tank and the gas collecting hood to users;

the methane tank is a traditional methane tank and consists of a fermentation room, a gas storage room, a feed inlet and a discharge outlet;

the septic tank is composed of a primary anaerobic chamber, a secondary anaerobic chamber, a tertiary anaerobic chamber, a feeding port and a discharging port, and each anaerobic chamber is separated by a partition plate and enters the next anaerobic chamber through a partition plate hole;

the pond is formed by utilizing the existing pond around residents or manually digging according to the requirement;

the gas collecting hood is covered on the liquid level of the pond, methane is collected by a drainage gas collecting method, and the gas collecting hood forms a gas storage cabinet.

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