CN203820783U - Double-tube type overflowing system of biogas fermentation tank - Google Patents

Abstract

The utility model discloses a double-pipe overflow system for a biogas fermentation tank, which comprises a biogas fermentation tank, an overflow pipe, an overflow device, and a pipe bracket. The biogas fermentation tank is connected, and the other end of the overflow pipe is connected with the overflow device. The bottom of the overflow device is provided with a biogas slurry pipe a and a biogas slurry pipe b. The biogas slurry inlet of the biogas slurry pipe a is lower than the biogas slurry pipe b is the biogas slurry inlet, and a gate valve and an electric valve are installed on the biogas slurry pipe a. Compared with the existing overflow system, the utility model adopts the operation mode of discharging first and then feeding. The device can effectively retain the activated sludge in the tank and improve the fermentation efficiency. When the electric valve breaks down or needs to be repaired, the biogas slurry can also be discharged in time through another spare pipeline, especially to prevent pipeline blockage, and the biogas slurry is discharged according to the sequence control, which is beneficial to retaining the activated sludge in the biogas fermentation tank and improving the fermentation efficiency. efficiency.

Description

A double-pipe overflow system for a biogas fermentation tank

technical field

The utility model relates to a fermentation tank discharge system, in particular to a biogas fermentation tank double-pipe overflow system.

Background technique

At present, there are more and more large-scale and medium-sized biogas projects at home and abroad. Most biogas projects use above-ground biogas fermentation tanks, but the discharge system of biogas fermentation tanks adopts a single-pipe self-overflow system. Moreover, automatic control is not realized, resulting in serious loss of activated sludge in the tank, which affects the efficiency of biogas fermentation.

Utility model content

In view of the above-mentioned problems in the prior art, the purpose of the utility model is to provide a double-pipe overflow system for a biogas fermentation tank that solves the above problems and adopts the operation mode of discharging first and then feeding.

The technical scheme of the utility model is: a double-pipe overflow system for a biogas fermentation tank, including a biogas fermentation tank, an overflow pipe, an overflow device, and a pipe support, and the end of the overflow pipe where the overflow port is located is inclined downward , and communicate with the biogas fermentation tank, the other end of the overflow pipe communicates with the overflow device, the bottom of the overflow device is provided with a biogas slurry pipe a and a biogas slurry pipe b, and the biogas slurry inlet of the biogas slurry pipe a is lower than The biogas slurry inlet of biogas slurry pipe b is equipped with a gate valve and an electric valve on the biogas slurry pipe a; it adopts a double-pipe structure, and when the electric valve on the biogas slurry pipe a fails or needs maintenance, it can also pass through the biogas slurry pipe b Remove biogas slurry in time;

Preferably, the biogas slurry pipe a is close to the biogas fermentation tank, and the biogas slurry pipe b is far away from the biogas fermentation tank, which is beneficial for the biogas slurry to preferentially enter the biogas slurry pipe a;

As a preference, a baffle and an open air guide port are provided on the top of the overflow device, the baffle plate is beneficial to prevent rainwater or other small animals from entering the overflow device and causing blockage, and the open air guide port is used to prevent the fermenter from sinking and breaking;

As preferably, the overflow port is 450mm away from the bottom of the overflow device, and the height difference between the two biogas slurry pipes in the overflow device is 200mm, which is conducive to keeping the pressure in the biogas fermentation tank constant;

As a preference, the inclination angle between the overflow pipe and the biogas fermentation tank is 40°, which effectively reduces pipeline resistance and facilitates biogas slurry entering the overflow device;

Preferably, it also includes a time-controlled switch, the time-controlled switch is electrically connected with the gate valve and the electric valve, and the opening of the electric valve can be controlled by the time-controlled switch. sludge.

The beneficial effects of the utility model are: the utility model adopts the operation mode of discharging first and then feeding, and the device can effectively retain the activated sludge in the tank and improve the fermentation efficiency. When the electric valve fails or needs to be repaired, the biogas slurry can also be discharged in time through another spare pipeline, especially to prevent pipeline blockage, and the biogas slurry is discharged according to the sequence control, which is beneficial to retaining the activated sludge in the biogas fermentation tank and improving the fermentation efficiency. efficiency.

Description of drawings

Fig. 1 is a schematic structural view of an embodiment of the utility model.

In the figure: 1. overflow pipe; 2. overflow device; 3. open air guide port; 4. baffle; 5. biogas slurry pipe a; 6. biogas slurry pipe b; 7. gate valve; 8. electric valve.

Detailed ways

Embodiment: As an embodiment of the present utility model, a biogas fermentation tank double-pipe overflow system as shown in Figure 1 includes a fermentation tank, an overflow pipe 1, an overflow device 2, and a pipe support. The end where the overflow of the flow pipe 1 is located is inclined downward and communicates with the fermenter, and the other end of the overflow pipe 1 communicates with the overflow 2, and the bottom of the overflow 2 is provided with a biogas slurry pipe a5 and a biogas slurry pipe b6, the biogas slurry inlet of the biogas slurry pipe a5 is lower than the biogas slurry inlet of the biogas slurry pipe b6, and a gate valve 7 and an electric valve 8 are installed on the biogas slurry pipe a5.

When the biogas slurry in the biogas fermentation tank flows into the overflow device 2 through the overflow pipe 1, the biogas slurry flows through the gate valve 7 along the biogas slurry pipe a5, and the gate valve 7 is in the normally open state. At this time, the electric valve 8 is in the closed state. Then when the liquid level of the biogas slurry rises to the top of the biogas slurry pipe b6, the electric valve 8 is set to be opened by time control, and the biogas slurry flows into the outside through the electric valve 8. After one discharge is completed, the electric valve 8 is set to close by time control, and the biogas fermentation tank is fed. After the feed is completed, after a certain fermentation time, the next discharge is performed, and the cycle is like this.

When the electric valve 8 needs maintenance, the gate valve 7 is closed, and the liquid level of the biogas slurry will rise to the top of the biogas slurry pipe b6, and then flow into the outside through the biogas slurry pipe b6. The top of the overflow is provided with an open air guide port 3 and a baffle plate 4. The open air guide port 3 is used to prevent the fermentation tank from sinking and breaking, and the baffle plate 4 is beneficial to prevent rainwater or other small animals from entering the overflow device and causing blockage. The entire overflow system is supported by the pipe support, and is fixedly connected with the fermentation tank through the pipe support.

The above is a detailed introduction of a biogas fermentation tank double-pipe overflow system provided by the utility model. In this paper, specific examples are used to illustrate the principle and implementation of the utility model. The description of the above examples is only for Help to understand the method of the utility model and its core idea; at the same time, for those of ordinary skill in the art, according to the idea of the utility model, there will be changes in the specific implementation and scope of application. Modifications will be possible without departing from the concept and scope specified in the appended claims. In summary, the content of this description should not be construed as limiting the utility model.

Claims (6)

1. A double-pipe overflow system for a biogas fermentation tank, comprising a biogas fermentation tank, an overflow pipe, an overflow device, and a pipe support, characterized in that: the end where the overflow port of the overflow pipe is located is inclined downward, and It communicates with the biogas fermentation tank, and the other end of the overflow pipe communicates with the overflow device. The bottom of the overflow device is provided with a biogas slurry pipe a and a biogas slurry pipe b. The biogas slurry inlet of the biogas slurry pipe a is lower than the biogas slurry The biogas slurry inlet of pipe b, and a gate valve and an electric valve are installed on the biogas slurry pipe a. 2. A biogas fermentation tank double-pipe overflow system according to claim 1, characterized in that: the biogas slurry pipe a is close to the biogas fermentation tank, and the biogas slurry pipe b is far away from the biogas fermentation tank. 3. A biogas fermentation tank double-pipe overflow system according to claim 1, characterized in that: a baffle plate and an open air guide port are arranged on the top of the overflow device. 4. A biogas fermentation tank double-pipe overflow system according to claim 1, characterized in that: the overflow port is 450 mm from the bottom of the overflow device, and the height difference between the two biogas slurry pipes in the overflow device is 200 mm . 5. A biogas fermentation tank double-pipe overflow system according to claim 1, characterized in that: the inclination angle between the overflow pipe and the biogas fermentation tank is 40°. 6. A biogas fermentation tank double-pipe overflow system according to claim 1, characterized in that it further includes a time-controlled switch, and the time-controlled switch is electrically connected to the gate valve and the electric valve.