CN209722129U - A kind of pool wall internal water circulation heating tube methane-generating pit - Google Patents

Abstract

The utility model provides a biogas digester with a water circulation heating tube inside the pool wall, which comprises a shell, a material inlet, a material outlet, a water inlet, a water outlet, a heat circulation pipe, a stirring shaft, a stirring motor and an exhaust port; the shell The body includes a top cover, a bottom cover and a side wall, and the top cover, the bottom cover and the side wall are fixedly connected sequentially from top to bottom; the feed inlet, the stirring motor and the exhaust port are fixedly arranged on the top cover; The discharge port is fixed at the bottom of the bottom cover; the side wall includes an outer wall and an inner wall, the lower part of the outer wall is fixed with the water inlet, and the upper part is fixed with the water outlet; the outer wall and the inner wall There is an insulation layer between them, and the thermal circulation pipe is wound inside the thermal insulation layer; the two ends of the thermal circulation pipe are fixedly connected to the water inlet and the water outlet respectively, and communicate with the outside through the water inlet and the water outlet ; The inner wall is provided with a stirring shaft, the stirring shaft is fixedly connected to the output shaft of the stirring motor, and the surface of the stirring shaft is fixedly provided with stirring blades.

Description

A biogas digester with internal water circulation heating pipes in the pool wall

technical field

The utility model relates to the technical field of biogas system auxiliary devices, in particular to a biogas pond with water circulation heating pipes inside the pool wall.

Background technique

In recent years, the construction of biogas for rural households has developed rapidly, reaching 40 million by the end of 2010. Due to the low temperature in low temperature seasons in cold regions, it is not conducive to the normal operation of biogas fermentation, and a large number of biogas digesters have been abandoned for a long time without use. Therefore, temperature has become the biggest factor restricting the promotion and development of biogas digesters in low temperature seasons in cold regions. On the other hand, in the cold regions of our country, the domestic hot water circulation system is an environmental protection system for household water preheating and circulation, which can be applied to various types of gas water heaters, electric water heaters, solar water heaters, air energy water heaters, wall-hung boilers, floor heating, etc. Hot water circulation. This system makes the utilization rate of hot water very high and the thermal efficiency is high, but the residual water and heat are not fully utilized.

In order to solve the problems related to temperature increase and heat preservation of biogas digesters in low temperature seasons in cold regions, patent 200720044650.1 discloses a winter biogas heating and fermentation device. Rapid fermentation produces biogas.

Patent 200720026529.6 discloses a biogas anaerobic fermentation device that uses solar energy and geothermal heat to increase temperature, and uses solar water heaters and heat exchange tanks to provide heat, especially a large and medium-sized biogas anaerobic fermentation that utilizes solar energy and geothermal heat to increase temperature device.

The above method of increasing temperature and heat preservation can effectively increase the temperature of biogas slurry, but it generally has the problems of increasing additional economic investment and inconvenient management and maintenance, which is not conducive to popularization in rural areas.

Utility model content

Aiming at the deficiencies of the prior art, the utility model provides a biogas digester with a water circulation heating pipe inside the pool wall, which combines the hot water circulation system widely used in cold regions to provide a warming and fermentation aid device suitable for low-temperature seasons in cold regions. The structure is simple, the construction is convenient, the cost is low and the efficiency is high.

In order to achieve the above object, the utility model is realized through the following technical solutions:

A biogas digester with water circulation heating pipe inside the pool wall, comprising: a shell, a material inlet, a material outlet, a water inlet, a water outlet, a heat circulation pipe, a stirring shaft, a stirring motor and an exhaust port;

The housing includes a top cover, a bottom cover and a side wall, and the top cover, the bottom cover and the side wall are fixedly connected sequentially from top to bottom; the feed inlet, stirring motor and exhaust port are fixedly arranged on the top Cover; the discharge port is fixed at the bottom of the bottom cover;

The side wall includes an outer wall and an inner wall, the lower part of the outer wall is fixedly provided with the water inlet, and the upper part is fixedly provided with the water outlet; an insulating layer is arranged between the outer wall and the inner wall, and the inner part of the insulating layer is wound with a The heat circulation pipe; the two ends of the heat circulation pipe are respectively fixedly connected to the water inlet and the water outlet, and communicate with the outside through the water inlet and the water outlet; the inside of the inner wall is provided with a stirring shaft, and the stirring shaft is fixed The output shaft of the stirring motor is connected, and stirring blades are fixedly arranged on the surface of the stirring shaft.

Further, the bottom cover is an ellipsoid shell cover, and its equatorial radius satisfies a=1.5b, wherein a and b are the equatorial radii along the x and y axis directions of the Cartesian coordinate system, respectively.

Further, the winding mode of the thermal cycle tube is spiral.

Further, the connection between the top cover, the bottom cover and the side wall is welding.

Further, the filling material of the thermal insulation layer is foamed polyurethane.

Further, the water outlet is connected to an external water pressure room.

Compared with the prior art, the utility model has the following beneficial effects:

The utility model adopts the way that hot water flows from bottom to top, which realizes the maximum utilization of the waste heat of hot water circulation; the spirally wound heat circulation pipe increases the heating area of the biogas slurry, and has a good effect of temperature increase and heat preservation; the heat circulation pipe is laid In the pool wall, the corrosion of the liquid in the pool to the water circulation pipe is reduced;

The utility model adopts an ellipsoidal pot bottom and a pool bottom, which greatly increases the self-flowability of the biogas slurry, and at the same time prevents the blockage at the discharge port; the stirring effect of the stirrer ensures the uniformity of heating of the items in the pool; The arrangement of the spirally wound thermal circulation pipes makes the items in the pool evenly heated, realizing the maximum utilization of water circulation heat; the foamed polyurethane around the heat pipes plays a role of heat preservation; The material in and out of the main fermentation tank can flow by itself, and the utility model has the advantages of convenient construction, low cost and favorable promotion.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are only some embodiments of the utility model, and those skilled in the art can also obtain other drawings based on these drawings without creative work.

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

Fig. 2 is a top view of the utility model;

Fig. 3 is the utility model A-A sectional view;

Fig. 4 is the B-B sectional view of the utility model;

Fig. 5 is a schematic diagram of the structure of the side wall in the utility model.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the utility model more clear, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the utility model. Obviously, the described The embodiments are some embodiments of the present utility model, but not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

The utility model provides a biogas digester with a water circulation heating pipe inside the pool wall, comprising: a shell, a material inlet 1, a material outlet 2, a water inlet 3, a water outlet 4, a thermal circulation pipe 5, a stirring shaft 9, and a stirring motor 11 and exhaust port 10;

The housing includes a top cover, a bottom cover 12 and a side wall, and the top cover, the bottom cover 12 and the side wall are fixedly connected sequentially from top to bottom; the feed inlet 1, the stirring motor 11 and the exhaust port 10 are fixed It is arranged on the top cover; the discharge port 2 is fixedly arranged at the bottom of the bottom cover 12;

The side wall includes an outer wall 6 and an inner wall 8, the lower part of the outer wall 6 is fixedly provided with the water inlet 3, and the upper part is fixedly provided with the water outlet 4; an insulating layer 7 is arranged between the outer wall 6 and the inner wall 8, The thermal cycle tube 5 is wound inside the thermal insulation layer 7; the two ends of the thermal cycle tube 5 are fixedly connected to the water inlet 3 and the water outlet 4 respectively, and communicate with the outside through the water inlet 3 and the water outlet 4 ; The inner wall 8 is provided with a stirring shaft 9, the stirring shaft 9 is fixedly connected to the output shaft of the stirring motor 11, and the surface of the stirring shaft 9 is fixedly provided with stirring blades.

Specifically, the bottom cover 12 is an ellipsoid shell cover, and its equatorial radius satisfies a=1.5b, wherein a and b are the equatorial radii along the x and y axis directions in the Cartesian coordinate system, respectively.

Specifically, the winding manner of the thermal cycle tube 5 is spiral.

Specifically, the connection between the top cover, the bottom cover 12 and the side walls is welding.

Specifically, the filling material of the thermal insulation layer 7 is foamed polyurethane.

Specifically, the water outlet 4 is connected to an external water pressure room.

The utility model adopts an ellipsoidal pot bottom and a pool bottom, which greatly increases the self-flowability of the biogas slurry, and at the same time prevents the blockage at the discharge port; the stirring effect of the stirrer ensures the uniformity of heating of the items in the pool; The arrangement of the spirally wound thermal circulation pipes makes the items in the pool evenly heated, realizing the maximum utilization of water circulation heat; the foamed polyurethane around the heat pipes plays a role of heat preservation; The material in and out of the main fermentation tank can flow by itself, and the utility model has the advantages of convenient construction, low cost and favorable promotion.

It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is a relationship between these entities or operations. any such actual relationship or order exists between them. Furthermore, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus comprising a set of elements includes not only those elements, but also includes elements not expressly listed. other elements of or also include elements inherent in such a process, method, article, or device. Without further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article or apparatus comprising said element.

The above embodiments are only used to illustrate the technical solutions of the present utility model, and are not intended to limit it; although the utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it can still be applied to the foregoing embodiments The technical solutions described in the examples are modified, or some of the technical features are equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims (6)

1. A biogas digester with water circulation heating pipe inside the wall, characterized in that, the biogas digester comprises: a housing, a feed inlet (1), a discharge outlet (2), a water inlet (3), a water outlet (4 ), thermal cycle pipe (5), stirring shaft (9), stirring motor (11) and exhaust port (10); The housing includes a top cover, a bottom cover (12) and a side wall, and the top cover, the bottom cover (12) and the side wall are fixedly connected sequentially from top to bottom; the feed inlet (1), stirring motor ( 11) and the exhaust port (10) are fixedly arranged on the top cover; the discharge port (2) is fixedly arranged at the bottom end of the bottom cover (12); The side wall comprises an outer wall (6) and an inner wall (8), the lower part of the outer wall (6) is fixedly provided with the water inlet (3), and the upper part is fixedly provided with the water outlet (4); the outer wall (6) is fixedly provided with the water inlet (3). ) and the inner wall (8) are provided with an insulation layer (7), and the inside of the insulation layer (7) is wound with the thermal cycle tube (5); the two ends of the thermal cycle tube (5) are respectively fixedly connected to the The water inlet (3) and the water outlet (4), and communicate with the outside through the water inlet (3) and the water outlet (4); the inner wall (8) is provided with a stirring shaft (9), and the stirring shaft (9) The output shaft of the stirring motor (11) is fixedly connected, and the surface of the stirring shaft (9) is fixedly provided with stirring blades. 2. A biogas digester with water circulation heating pipe inside the pool wall according to claim 1, characterized in that: the bottom cover (12) is an ellipsoid shell cover, and its equatorial radius satisfies a=1.5b, where a and b are the equatorial radii along the x and y axes of the Cartesian coordinate system, respectively. 3. A biogas digester with internal water circulation heating pipes in the pool wall according to claim 1, characterized in that: the heat circulation pipe (5) is wound in a spiral type. 4. A biogas digester with internal water circulation heating pipes in the pool wall according to claim 1, characterized in that: the connection between the top cover, the bottom cover (12) and the side wall is welding. 5. A biogas digester with internal water circulation heating pipes in the pool wall according to claim 1, characterized in that: the filling material of the thermal insulation layer (7) is polyurethane foam. 6. A biogas digester with internal water circulation heating pipes in the pool wall according to claim 1, characterized in that: the water outlet (4) is connected to the external water pressure room.