CN202054835U - Uncovered high-heat-insulation greenhouse methane pool - Google Patents

Abstract

The utility model relates to a methane pool, in particular to an uncovered high-heat-insulation methane pool built inside a greenhouse. The uncovered high-heat-insulation greenhouse methane pool comprises a cylindrical fermentation pool buried under the ground, wherein a methane pipe introduced into a hollow cavity arranged inside the pool is also arranged on the pool top of the fermentation pool, two side surfaces of the fermentation pool are respectively provided with a material inlet and a material outlet, and the material inlet and the material outlet are respectively communicated with a material inlet pool and a material outlet pool through pipelines. The uncovered high-heat-insulation greenhouse methane pool is characterized in that the top of the fermentation pool is not provided with a sealing cover, and a cover plate is arranged at the material inlet part. The methane pool is not provided with a cover, so the influence caused by external oxygen during cover uncovering does not exist, and the methane pool is always under a good anaerobic condition. Simultaneously, the temperature required by the fermentation is ensured because of greenhouse effect inside the greenhouse. The purposes of products of the methane pool are wide, the greenhouse temperature can be raised through produced gas, energy sources are saved, carbon dioxide and ammonia gas in the produced gas can be used as gas fertilizers, the plant metabolism is promoted, and the plant growth is favorably realized. Methane liquid and methane slag can be used as high-quality organic fertilizers of vegetables.

Description

A biogas digester with no cover and high thermal insulation greenhouse

technical field

The invention relates to a methane digester, in particular to a coverless, high heat-retaining methane digester built inside a greenhouse. the

Background technique

At present, biogas digesters have been generally built in the vast rural areas of our country to solve the lighting and fuel problems in the vast rural areas. In recent years, biogas digester projects have developed rapidly, but there are still problems such as difficult management of movable covers and low efficiency of gas production in winter. If the movable cover of the biogas digester is activated frequently, it will not only be easily damaged, but also the materials in the fermentation tank will often be in contact with oxygen when the cover is removed, which is not conducive to the anaerobic fermentation of organisms, thereby affecting gas production. In addition, especially in sandy soil areas without clay, it is difficult to cover. Therefore, the movable cover on the top of the digester is not easy to maintain and manage. At the same time, the temperature in winter is low, it is difficult to maintain the temperature required for biological fermentation, and the gas production is significantly reduced compared with summer, or even no gas is produced. the

At present, there are various ways to increase temperature. For example, some materials have introduced the technology of using cattle and sheep dung or firewood to keep the biogas digester warm in winter. An insulation layer is added on the ground, but the insulation layer is easily damaged. Therefore, the inability to insulate the biogas digester due to structural layout restrictions is also one of the reasons for the low temperature of the biogas digester in winter. the

Utility model content

The purpose of the present invention is to overcome the problems existing in the above-mentioned background technology, and to provide a coverless high heat preservation biogas digester built inside the greenhouse. Thus, a virtuous ecological cycle with biogas as the link is formed inside the greenhouse, which can not only solve the problem of low gas production in winter, but also achieve the purpose of increasing vegetable production. the

The utility model proposes the following technical solutions:

A biogas digester without a cover and a high thermal insulation shed includes a cylindrical fermentation tank buried under the ground. The feed port and the discharge port, the feed port and the discharge port are respectively connected to the feed tank and the discharge tank through pipelines; the feature is that there is no cover on the top of the fermentation tank, and a cover plate is provided at the feed port. the

As a preference, the feed pool is a trumpet-shaped structure with a small top and a large bottom. The feed inlet is designed to be trumpet-shaped and needs to be covered with a slightly larger diameter, which is convenient for manual entry and exit operations. In this way, the biogas digester is not only easy to operate but also has good anaerobic fermentation conditions. the

Preferably, fixing holes are evenly distributed on the outer peripheral surface of the cover plate. the

The working principle of the present invention is: this kind of biogas digester without cover and high thermal insulation shed solves the deficiency of the movable cover, and the top is designed as coverless and the feed port is designed as a trumpet shape with a slightly larger diameter, which is convenient for manual maintenance and avoids Frequent contact with air when the cover is uncovered provides better anaerobic conditions and is conducive to fermentation activities. At the same time, through the direct sunlight on the plastic greenhouse, the greenhouse has a certain thermal insulation performance, and a certain amount of heat is transferred to the biogas digester to provide a fermentation temperature. The high calorific value of the produced gas can increase the temperature inside the greenhouse, prevent the freezing damage of vegetables, and finally form a "greenhouse effect" inside the greenhouse. This effect ensures that the biogas digester and the greenhouse are kept at a higher temperature, and ensures the normal operation of fermentation gas production, so as to achieve efficient heat preservation of the biogas digester and achieve the purpose of high vegetable production. the

The beneficial effects of the utility model are: since the biogas pool has no cover, it is not affected by external oxygen when the cover is uncovered, and is always under good anaerobic conditions; at the same time, due to the "greenhouse effect" inside the greenhouse, it ensures temperature. Under these two conditions, the biogas digester can achieve high heat preservation and high gas production. In addition, the products of biogas digesters are widely used, and the gas produced can increase the temperature of the greenhouse and save energy; the carbon dioxide and ammonia in it can be used as gas fertilizer to promote plant metabolism and benefit the growth of plants. Biogas slurry and residue can be used as high-quality organic fertilizer for vegetables. Therefore, the present invention is not limited to the use of biogas for boiling water and cooking, and the produced gas can also be used as gas fertilizer, which has good popularization significance. the

Description of drawings

Fig. 1 is the structural representation of the utility model. the

Fig. 2 is a schematic diagram of the cross-sectional structure of the cover plate in the utility model. the

Detailed ways

Below in conjunction with accompanying drawing of description, the technical solution of the utility model is described further. the

A biogas digester with no cover and high thermal insulation greenhouse, including a cylindrical fermentation tank 1 buried under the ground, a biogas pipe 6 leading to the cavity in the tank is also provided on the top of the fermentation tank, and the two sides of the fermentation tank are respectively made There is a feed port 4 and a discharge port 5, and the feed port 4 and the discharge port 5 are respectively connected to the feed pool 2 and the discharge pool 3 through pipelines. The improvement of the utility model is that: the top of the fermentation tank is not provided with a cover, which is completely sealed; the feed tank 2 is set into a trumpet-shaped structure with a small top and a large bottom; a cover plate 7 is provided at the 4 feed ports. The feeding tank is designed to be trumpet-shaped and needs to be covered, with a slightly larger diameter, which is convenient for manual entry and exit operations. In this way, the biogas digester is not only easy to operate but also has good anaerobic fermentation conditions. the

Fixing holes 8 are evenly distributed on the outer circumference of the cover plate 7 . the

The specific embodiments described herein are only examples to illustrate the spirit of the present invention. Those skilled in the technical field to which the utility model belongs can make various modifications or supplements to the described specific embodiments or adopt similar methods to replace them, but they will not deviate from the spirit of the utility model or go beyond what is stated in the appended claims. defined range. the

Claims (3)

1. high heat preservation greenhouse methane-generating pit of uncovered, comprise and be embedded in underground tubular fermentation vat (1), also be provided with the biogas pipe (6) of a feeding pond internal cavity on the Chi Ding of described fermentation vat, the two sides of fermentation vat are shaped on opening for feed (4) and discharge port (5) respectively, and opening for feed (4) and discharge port (5) are communicated with charging pond (2) and material-output tank (3) by pipeline respectively; It is characterized in that: described fermentation vat top is not provided with capping and sealing fully, and opening for feed (4) locates to be provided with cover plate (7).

2. the high heat preservation greenhouse methane-generating pit of uncovered according to claim 1 is characterized in that: described charging pond (2) is up-small and down-big flared structure.

3. the high heat preservation greenhouse methane-generating pit of uncovered according to claim 1 and 2 is characterized in that: be evenly equipped with fixed orifices (8) on described cover plate (7) outer circumference surface.

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