CN201634676U - A trough fermentation digester - Google Patents

Abstract

The utility model discloses a trough-type fermentation biogas pond, which comprises a sewage inlet (1), an acidification sediment pond (2), a sewage channel (3), a feed pond (5), a biogas pond main body (7), The fermentation tank (8), the tank cover (11) and the air outlet (12), the feed pipe (6) is installed between the feed tank (5) and the fermentation tank (8), and the stirring tank (8) is installed Pipe (14), agitating pipe (14) has several injection holes, the upper part of the biogas tank main body (7) is equipped with a movable grid (10), and the outside of the biogas tank main body (7) is provided with a hydraulic pool (18) And slag discharge tank (15), the top of hydraulic tank (18) is provided with overflow port (19), and the bottom is provided with the overflow pipe (17) that links to each other with fermenting tank (8), and slag discharge tank (15) and An automatic slag discharge pipe (16) is arranged between the fermentation tanks (8). The utility model can effectively prevent scum from encrusting, and can limit the pressure and the minimum liquid level, and the gas production rate is 15%-25% higher than that of the common trough tank, and is suitable for the fermentation of various raw materials, and the slag is convenient to discharge.

Description

A trough fermentation digester

technical field

The utility model relates to a biogas pool, in particular to a trough-type fermentation biogas pool.

Background technique

At present, our country has gradually changed from the past one family breeding to intensive and large-scale direction. Many farmers no longer raise pigs and cattle, resulting in the shortage of biogas raw materials for some biogas farmers. The raw materials are diversified and the characteristics of mixed raw material fermentation require biogas. The pool can adapt to the needs of various fermentation processes and various fermentation raw materials, and improve the gas production rate of mixed fermentation continuous or batch fermentation processes. However, traditional biogas digesters have the defects of large straw raw materials floating up after mixed fermentation of livestock waste and straw, and poor mass transfer inoculation effect.

Utility model content

The technical problem to be solved by the utility model is to provide a trough-type fermentation biogas digester which can effectively prevent scum from encrusting and improve the effect of mixed fermentation mass transfer and inoculation.

The utility model solves the above-mentioned technical problems with the following technical solutions: the utility model trough-type fermentation biogas digester includes a sewage inlet 1, an acidification sediment pond 2, a sewage channel 3, a feed pond 5, a biogas pond main body 7, a fermentation pond 8, and a pond cover 11 and the gas outlet 12, a feed pipe 6 is installed between the feed tank 5 and the fermentation tank 8, a stirring tube 14 is installed in the fermentation tank 8, and several injection holes are opened on the stirring tube 14, and the upper part of the biogas tank main body 7 is installed There are movable grids 10, a hydraulic pool 18 and a slag discharge pool 15 are provided on the outside of the biogas tank main body 7, an overflow port 19 is provided at the upper part of the hydraulic pool 18, and an overflow pipe 17 connected with the fermentation tank 8 is provided at the lower part , An automatic slag discharge pipe 16 is provided between the slag discharge tank 15 and the fermentation tank 8 .

The outlet position of the feed pipe 6 in the fermentation tank 8 is lower than the movable grid 10 .

The automatic slag discharge pipe 16 is arranged opposite to the feed pipe 6 .

The movable grid 10, the pool cover 11 and the biogas digester main body 7 are all flexibly connected.

The stirring tube 14 is provided with at least two rows and is connected to a booster pump. The injection holes on the stirring tube 14 are arranged in a zigzag shape.

The bottom of the fermentation tank 8 is provided with a slope 9, and the entrance of the automatic slag discharge pipe 16 is located at the lowest position in the tank.

The utility model trough-type biogas digester can meet the requirements of continuous feed fermentation process and batch feed fermentation process, and has the advantages of convenient feeding and discharging, good fermentation effect and effective prevention of scum encrustation, and solves the difficulty of discharging materials in rural methane digesters. problems, crusting problems, and solve the problem of poor mass transfer inoculation effect of mixed fermentation of livestock and poultry waste and straw.

Compared with the existing rectangular open fixed biogas digester, the utility model has the following advantages:

(1) It is convenient to realize continuous or batch anaerobic fermentation, and it is convenient to discharge slag;

(2) It has the function of forced stirring, which can effectively prevent scum and crust;

(3) During mixed fermentation, all the straw can be immersed in the biogas slurry to improve the mass transfer effect, and the gas production rate is 15%-25% higher than that of the existing common trough biogas digester.

Description of drawings

Fig. 1 is a structural schematic diagram of a trough-type fermentation biogas digester of the present invention. The pool cover and movable grid are not shown in the figure.

FIG. 2 is a schematic cross-sectional view along line A-A of FIG. 1 . The figure shows the pool cover and movable grid.

Fig. 3 is a schematic cross-sectional view along B-B of Fig. 1 .

In the figure: sewage inlet 1, acidification sediment tank 2, sewage channel 3, grid 4, feed tank 5, feed pipe 6, digester body 7, fermentation tank 8, slope 9, movable grid 10, pool cover 11 , Air outlet 12, fixed column 13, stirring pipe 14, slag discharge tank 15, automatic slag discharge pipe 16, overflow pipe 17, hydraulic pool 18, overflow port 19.

Detailed ways

Below in conjunction with accompanying drawing, the utility model trough type biogas digester is further described:

On one side of the rectangular biogas digester main body 7, there is a connected acidification sediment tank 2 and a feed tank 5, one side of the acidification sediment tank 2 is provided with a sewage inlet 1, and the other side is connected to the feed tank 5 Sewage channel 3 There is a grid 4 on the top, and the bottom of the feed tank 5 is connected to the feed pipe 6, and the feed pipe 6 extends into the lower part of the fermentation tank 8 located inside the main body 7 of the biogas digester. There are three rows of fixed columns 13 in the fermentation tank 8, and each row is fixed A connected stirring tube 14 is installed on the column, and there are several spray holes arranged in the shape of a letter on the stirring tube 14. The upper part of the biogas digester body 7 is equipped with a detachable movable grid 10 and a pool cover 11. The pool cover 11 is provided with an air outlet 12 connected with the gas inlet pipe of the user's stove; the other side of the biogas tank main body 7 is provided with a slag discharge tank 15 and two connected hydraulic tanks 18, and the upper part of the hydraulic tank 18 is provided with an overflow Orifice 19, the lower part is provided with overflow pipe 17 connected with fermentation tank 8, automatic slag discharge pipe 16 is provided between slag discharge tank 15 and fermentation tank 8, automatic slag discharge pipe 16 is arranged opposite to feed pipe 6 The outlet position of the feed pipe 6 in the fermentation tank 8 is lower than the movable grid 10; the bottom of the fermentation tank 8 is provided with a slope 9, and the entrance of the automatic slag discharge pipe 16 is located at the lowest position in the tank; the sewage in the acidification sediment tank 2 The inlet 1 is higher than the overflow port 19 on the top of the hydraulic tank 18 .

The height of the biogas digester main body 7 is limited by the maximum pressure generated in the fermentation tank, generally 40 cm-60 cm.

The slope 9 at the bottom of the tank is sloped from the feed pipe 6 to the automatic slag discharge pipe 16, and it is advisable that the biogas residue can flow freely.

Described overflow pipe 17 stretches in the fermentation tank and extends downwards along the pool wall, and its depth exceeds 20-50 centimeters of the movable grid 10 depth.

The working process of the utility model trough type biogas tank is as follows:

The working process of the continuous feeding process is: the livestock manure flows through the acidification sediment tank 2 and after the sediment is treated, it enters the feed tank 5 through the grid 4, and then flows into the fermentation tank 8 from the feed pipe 6. Straw and other raw materials are directly added from the feed tank 5 after being chopped and retting, and then enter the fermentation tank 8 through the feed pipe 6 . The manure liquid is mixed with other straw raw materials and fermented in the closed fermentation tank 8 to produce biogas, which is discharged from the gas outlet 12 .

The working process of the batch feeding process is: the livestock manure flows through the acidification sediment tank 2, after the sediment is treated, it enters the feed tank 5 through the grid 4, and then flows into the fermentation tank 8 from the feed pipe 6; other raw materials such as straw are cut After the debris retting process, after opening the movable grid 10 and the pool cover 11, feed directly from the upper part of the pool body, and then fasten the movable grid 10 and the pool cover 11. The manure liquid is mixed with other straw raw materials and fermented in the closed fermentation tank 8 to produce biogas, which is discharged from the gas outlet 12 .

Because the raw material is fermented in the fermentation tank 8 to produce gas, the air pressure increases, the biogas slurry in the fermentation tank 8 is pressed into the hydraulic tank 18 through the overflow pipe 17, the liquid level of the fermentation tank 8 drops, and the liquid level of the hydraulic tank 18 rises. When the overflow port 19 is exceeded, the biogas slurry overflows from the overflow port 19; the outside gas is used, and the air pressure in the fermentation tank 8 decreases, and under the action of the hydraulic tank 18, the liquid level of the fermentation tank 8 rises, making the fermentation tank 8. The biogas slurry capacity and air pressure are always kept within a certain range. Due to the isolation effect of the movable grid 10, the scum and straw are always below the liquid level, and the crust layer cannot be formed, and the straw fermentation effect is improved at the same time.

Fresh raw materials move towards the mouth of the automatic slag discharge pipe 16 along the slope 9 at the bottom of the tank while fermenting. The straw settles after fermentation, dissolution and decay, and finally accumulates in the lowest part of the fermentation tank. 16 is discharged to the slagging tank 15. When stirring is required in the pool, the stirring tube 14 is connected to a booster pump, and the booster pump pumps biogas slurry or external biogas from the hydraulic pool 18, and injects biogas slurry or biogas from the injection hole on the stirring tube 14, thereby stirring the biogas in the pool Liquid, make anaerobic microorganisms fully contact with fermentation raw materials, increase gas production rate, and destroy and prevent crusting on the liquid surface.

After a period of operation, the sediment in the fermentation tank increases, and the straw fermentation reaches a certain period. When it is necessary to carry out large-scale discharge, or when batch feeding and fermentation discharge, after opening the tank cover 11 and the movable grid 10, the operator will use it. It is very convenient to enter the pool for discharging operation.

Claims (6)

1. A trough-type fermentation biogas digester, comprising a sewage inlet (1), an acidification sediment pond (2), a sewage channel (3), a feed pond (5), a biogas digester main body (7), a fermentation pond (8), Pool cover (11) and air outlet (12), feed pipe (6) is installed between feed tank (5) and fermentation tank (8), it is characterized in that, stirring tube ( 14), the stirring pipe (14) has several injection holes, the upper part of the biogas tank main body (7) is equipped with a movable grid (10), and the outside of the biogas tank main body (7) is provided with a hydraulic pool (18) and a drain The slag pool (15), the top of the water pressure pool (18) is provided with an overflow port (19), the bottom is provided with an overflow pipe (17) that communicates with the fermentation tank (8), and the slag discharge tank (15) is connected to the fermentation tank (8) is provided with automatic slag discharge pipe (16). 2. The trough-type fermentation biogas digester according to claim 1, characterized in that, the outlet position of the feed pipe (6) in the fermentation tank (8) is lower than the movable grid (10). 3. The trough-type fermentation biogas digester according to claim 1, characterized in that, the automatic slag discharge pipe (16) is arranged opposite to the feed pipe (6). 4. The trough-type fermentation biogas digester according to claim 1, characterized in that, the movable grid (10), pool cover (11) and the biogas digester main body (7) are all movable connections. 5. The trough-type fermentation biogas digester according to claim 1, characterized in that, the stirring tube (14) is at least provided with two rows and is connected with a pressurizing pump, and the injection holes on the stirring tube (14) are arranged in a character shape, The inlet of the pressurizing pump is connected to the biogas slurry of the hydraulic tank (18) or externally connected to the biogas. 6. The trough-type fermentation digester according to claim 1, characterized in that, the bottom of the fermentation tank (8) is provided with a slope (9), and the entrance of the automatic slag discharge pipe (16) is located at the lowest position in the tank .

Images