CN201092571Y - Household methane preparing system for cold area - Google Patents

Abstract

The utility model relates to a household biogas preparation system in cold areas, which belongs to the field of environmental protection and renewable energy sources, and substantially comprises a fermentor (4), wherein the two ends of the fermentor (4) are equipped with a feeding box (2) and a discharging box (11), the middle portion of the fermentor (4) is equipped with a manual stirring mechanism (3), and a leading hole (5) is arranged in the center of the upper portion of the pot body of the fermentor (4). The household biogas preparation system is characterized in that the fermentor is arranged in a cement pool (12), a biologic reactor is positioned between the cement pool and the fermentor, and the biologic reactor and the fermentor are packaged together by a plastic cloth. The middle of feeding box (2) and the discharging box (11) are communicated by a return conduit (10) which plays roles of refluxing and stirring biogas slurry, and the upper surface of the cement pool is equipped with a double film cover board (9) which plays roles of insulation and warming. The system is capable of being widely used in northern cold areas to solve the problem that the rural household biogas is difficult to go through winter.

Description

Household biogas production system in cold area

technical field

The patent of the present invention belongs to the field of environmental protection and renewable energy, and in particular relates to a device and system for utilizing biogas for the harmless treatment of family breeding excrement and urine in cold regions.

Background technique

With the development of the economy and the improvement of people's living standards, people pay more and more attention to their living environment and quality of life. It is necessary to change the phenomenon of livestock manure all over the ground, sewage flowing, mosquito breeding, and kitchen smoky in the past. , biogas construction is essential. Biogas can not only improve the living conditions of villagers, but also promote the development of farming and breeding industry. The comprehensive utilization of biogas residue and biogas slurry can also reduce the use of pesticides and fertilizers, reduce production costs, and improve the quality of agricultural products. Farmers use biogas for cooking and lighting, and use biogas residue and biogas slurry as fertilizer, which can reduce production and living expenses by more than 1,000 yuan per year. Developing the courtyard economy by changing kitchens, toilets, and circles can eliminate the "three piles" in rural areas, improve the rural environment, and improve farmers' health levels.

After decades of development, biogas technology has been relatively mature and widely used in the south of my country. Due to the influence of temperature, the development in the north of my country is relatively slow. Although many biogas digesters have been built, the operation in winter is not very ideal. To solve the problem of normal production of biogas in winter in the north, temperature is the key. Currently, there is no ideal solution.

Contents of the invention

The technical problems to be solved by the present invention are: focusing on solving the difficulties in producing biogas in winter and spring in the northern cold regions, unreasonable temperature increase and heat preservation technologies, and difficulty in realizing continuous production of biogas throughout the year. cannot be dealt with in a timely manner. A biogas production system suitable for solving rural fecal and urine pollution and changing the quality of rural living fuel is provided in the cold northern region.

The present invention is designed like this:

A biogas production system for household use in cold regions, mainly composed of a fermenter 4, the two ends of the fermenter 4 are provided with a feed box 2 and a discharge box 11, a manual stirring mechanism 3 is provided in the middle, and the middle of the upper part of the fermenter 4 The position is provided with lead hole 5, and it is characterized in that: described fermenter is placed in cement pool 12, puts bioreactor 1 in the middle of cement pool and fermenter, bioreactor 1 and fermenter 4 are wrapped by plastic cloth together, and described into The feed box 2 and the discharge box 11 have a return pipe 10 in the middle, and a double-membrane cover plate 9 is installed on the cement pool 12 .

Described bioreactor 1 is after the stalk of chopping is stirred with biological bacteria, seals storage; The two ends of described fermenter are provided with feed box 2 and discharge box 11, and the bottom of feed box and discharge box are all A control valve is provided to continuously feed and discharge materials; the middle position of the upper part of the fermentation tank 4 is provided with a pilot hole 5, and a pilot hole cover is provided on the pilot hole, and a safety valve interface 6 and a pressure gauge interface 7 are provided on the pilot hole cover. , gas outlet 8, the safety valve interface is connected to the safety valve, the pressure gauge interface is connected to the pressure gauge, the gas outlet is connected to the biogas purification device, and then connected to the biogas stove. Described cement pool (12) is built underground.

The beneficial effects of the present invention are as follows: adopting the above-mentioned designed household biogas production system in cold regions, the fermenter 4 is wrapped by plastic cloth and the bioreactor 1, and placed in a closed cement pool, the bioreactor itself will generate a large amount of heat, and the The cloth is wrapped on the outer surface of the fermentation tank 4, which can continuously provide heat for the fermentation tank, thereby ensuring the reaction temperature of the fermentation raw materials, and at the same time plays the role of heat insulation between the fermentation tank and the outside world. The upper surface of the cement pool 12 is covered by a double-film cover plate 9 Closed, the double-membrane cover can absorb solar heat, and the cement pool and double-membrane cover can further insulate and increase the temperature of the biological reactor and fermentation tank. By taking the above measures, the temperature of the fermentation raw materials in the biogas fermentation tank 4 can be well guaranteed, thereby solving the problem of difficulty in overwintering rural households with biogas in cold northern regions, realizing effective production of biogas throughout the year, and harmless treatment of northern rural areas Livestock and poultry manure can improve the living environment of farmers and improve the quality of life of farmers.

environmental benefits

Through the promotion of advanced and practical biogas technology, the pollution of surface water, groundwater, atmospheric environment and microbial pollution by livestock and poultry manure can be eliminated, and the quality of rural environment can be improved, with huge environmental benefits.

economic benefits

Take the 6m ³ fermentation tank as an example:

Five people, three fattening pigs or one cow plus a small amount of corn straw, to make a 6m ³ iron can, need A ₃ steel plate 3 mm thick, 0.542 tons, 2330 yuan, plus processing costs 4500 yuan, a total of about 6000 yuan about. The service life is 30 years.

It can produce 1000m ³ of biogas for cooking in a year, which is equivalent to 16 cans of liquefied gas. If each tank of liquefied gas is 75 yuan, then 16×75=1200 yuan. The annual output of biogas fertilizer is 8 tons, calculated at ￥200 per ton of biogas fertilizer, then 8×200＝1600 yuan. Annual profit creation: 2,800 yuan, the cost can be recovered in more than two years.

Description of drawings

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

Figure 1 is a schematic diagram of the structure of a household biogas production system in a cold region.

In Figure 1: 1. Bioreactor, 2. Feed box, 3. Manual stirring mechanism, 4. Fermentation tank, 5. Lead hole 6. Safety valve interface, 7. Pressure gauge interface, 8. Gas outlet, 9. Double Membrane cover plate, 10. return pipe, 11. discharge box, 12. cement pool.

Detailed ways

As shown in Figure 1, a biogas production system for households in cold regions is mainly composed of a fermenter 4. The two ends of the fermenter 4 are provided with a feed box 2 and a discharge box 11, and a manual stirring mechanism 3 is provided in the middle. The middle position of the upper part of the tank body of the tank 4 is provided with a guide hole 5, and the fermenter 4 is placed in a cement pool 12, and the bioreactor 1 is placed between the cement pool 12 and the fermenter 4, and the bioreactor 1 and the fermenter 4 are covered by a plastic cloth. Package, the bioreactor 1 is to stir the crushed stalks with a kind of biological bacteria, seal and store, and keep warm and increase the temperature of the fermenter. The two ends of the fermenter are provided with feed boxes 2 With the discharge box 11, the bottom of the feed box and the discharge box are all provided with control valves, which can continuously feed and discharge. The feed box 2 and the discharge box 11 have a return pipe 10 in the middle, which plays the role of biogas slurry reflux and stirring. The guide hole 5 has a guide hole cover, and a safety valve interface is provided on the guide hole cover. 6. Pressure gauge interface 7, gas outlet 8, safety valve interface to safety valve, pressure gauge interface to pressure gauge, gas outlet to biogas purification device, and then biogas stove, etc. Double-membrane cover plate 9 is housed above described cement pool 12, plays the effect of heat preservation and temperature increase. Described cement pond 12 is built underground, and plays the effect of earth retaining and cold protection. The beneficial effects of the present invention are as follows: adopting the above-mentioned designed household biogas production system in cold regions, the fermenter 4 is wrapped by plastic cloth and the bioreactor 1, and placed in a closed cement pool, the bioreactor itself will generate a large amount of heat, and the The cloth is wrapped on the outer surface of the fermentation tank 4, which can continuously provide heat for the fermentation tank, thereby ensuring the reaction temperature of the fermentation raw materials, and at the same time plays the role of heat insulation between the fermentation tank and the outside world. The upper surface of the cement pool 12 is covered by a double-film cover plate 9 Closed, the double-membrane cover can absorb solar heat, and the cement pool and double-membrane cover can further insulate and increase the temperature of the biological reactor and fermentation tank. By taking the above measures, the temperature of the fermentation raw materials in the biogas fermentation tank 4 can be well guaranteed, thereby solving the problem of difficulty in overwintering rural households with biogas in cold northern regions, realizing effective production of biogas throughout the year, and harmless treatment of northern rural areas Livestock and poultry manure can improve the living environment of farmers and improve the quality of life of farmers.

Claims (5)

1. A biogas production system for households in cold regions, mainly composed of a fermenter (4), with a feed box (2) and a discharge box (11) installed at both ends of the fermenter (4), with manual stirring in the middle Mechanism (3), the fermenter (4) is provided with a guide hole (5) in the upper middle of the tank body, and is characterized in that: the fermenter is placed in a cement pool (12), and a biological reactor is placed between the cement pool and the fermenter (1), bioreactor (1) is wrapped by plastic cloth together with fermenter (4), and described feed box (2) and discharge box (11) have return pipe (10) in the middle, and described cement pool Double-membrane cover plate (9) is equipped with above (12). 2. A household biogas production system in cold regions according to claim 1, characterized in that said bioreactor (1) is sealed and stored after stirring the shredded straw with biological bacteria. 3. A household biogas production system in cold regions according to claim 1, characterized in that the two ends of the fermenter are provided with a feed box (2) and a discharge box (11), the feed box and There are control valves at the bottom of the discharge box, which can continuously feed and discharge materials. 4. A household biogas production system in cold regions according to claim 1, characterized in that the middle position of the upper part of the fermenter (4) is provided with a guide hole (5), and there is a guide hole on the guide hole Cover, the hole cover is provided with a safety valve interface (6), a pressure gauge interface (7), an air outlet (8), the safety valve interface is connected to the safety valve, the pressure gauge interface is connected to the pressure gauge, and the gas outlet is connected to the biogas purification device, and then Connect to the biogas stove. 5. A household biogas production system in cold regions according to claim 1, characterized in that said cement pool (12) is built underground.