CN204874510U - Biogas fermentation tank ejection of compact overflow arrangement - Google Patents

Abstract

The utility model belongs to a biogas fermentation tank discharge overflow device in the field of energy production, which is composed of a water inlet pipe (2), an overflow tank (10) and a water outlet pipe (7). The overflow tank (10) is provided with The baffle (4) separates the overflow tank (10) into a hydraulic chamber (3) and an overflow chamber (6). ) is provided with a water pressure chamber cover plate (5), the top of the overflow chamber (6) is provided with an atmospheric communication hole (9), the water inlet pipe (2) is located at the lower side of the water pressure chamber (3), and the water outlet pipe (7 ) at the bottom of the overflow chamber (6). The utility model overcomes the technical defects that the overflow pipe of the existing biogas fermentation tank easily causes the working pressure of the fermentation tank to be unstable, there is a risk of negative pressure destroying the biogas fermentation tank body, and the overflow pipe is not suitable for replacement after crystallization and blockage. The biogas fermentation tank provided The discharge overflow device stabilizes the working pressure of the biogas fermentation tank, has the function of negative pressure protection, and is easy to replace.

Description

Biogas fermentation tank discharge overflow device

technical field

The utility model belongs to the field of energy production, in particular to a material overflow device for a biogas fermentation tank.

Background technique

The existing biogas fermenter adopts an overflow pipe for discharging material, and there is no special overflow device. The vertical heights of the existing overflow pipes are installed in different sizes, resulting in unstable working pressure of the fermenter, too high or too low pressure; the top of some overflow pipes is not connected to the atmosphere or the hole area connected to the atmosphere is too small. Risk of negative pressure damaging the biogas fermentation tank. After a large number of biogas project operation investigations, it is also found that after long-term use of the overflow pipe of the biogas fermentation tank (generally 2 to 3 years), there is a phenomenon of crystallization blocking the overflow pipe, and it is very difficult to remove the crystals. Welding method, after the biogas project is started and running, it cannot be operated with fire (or sparks), which makes it difficult to replace the pipeline.

Contents of the invention

The purpose of this utility model is to overcome that the overflow pipe of the existing biogas fermentation tank easily causes the working pressure of the fermentation tank to be unstable, the pressure is too large or too small, and there is a risk of negative pressure destroying the biogas fermentation tank, and the overflow pipe should not be replaced after crystallization and blockage To solve the technical defects, a biogas fermentation tank discharge overflow device with constant working pressure, negative pressure protection function and easy replacement is provided.

The purpose of this utility model is achieved through the following technical solutions:

The discharge overflow device of the biogas fermentation tank of the utility model is mainly composed of a water inlet pipe (2), an overflow tank (10) and a water outlet pipe (7), and is characterized in that a baffle is arranged in the overflow tank (10) (4) Separate the overflow tank (10) into a hydraulic chamber (3) and an overflow chamber (6), the top of the water pressure chamber (3) and the overflow chamber (6) are connected, and the top of the water pressure chamber (3) There is a water pressure chamber cover (5), the overflow chamber (6) is provided with an atmospheric communication hole (9), the water inlet pipe (2) is located at the lower side of the water pressure chamber (3), and the water outlet pipe (7) is located at Bottom of overflow bin (6).

In the above scheme, the ends of the water inlet pipe (2) and the water outlet pipe (7) are respectively provided with a water inlet pipe flange (1) and a water outlet pipe flange (8); the water inlet pipe (2) passes through the water inlet pipe flange (1) ) is connected to the biogas fermentation tank.

The utility model is a scientific and practical technical solution that the designer has explored through practice. The principle of the utility model is: under the action of the feed water pressure and air pressure, the sewage enters the water pressure chamber from the water inlet pipe, and the water level When the water level rises continuously in the water pressure chamber and reaches the top of the baffle, the pressure generated by the water level difference is the maximum design pressure of the biogas fermentation tank; at this time, the water level continues to rise, it will turn over the baffle and enter the overflow chamber, and pass through the outlet pipe discharge.

There is no cover plate on the top of the overflow bin, and it is connected to the atmosphere, so as to avoid the occurrence of siphon phenomenon when the biogas fermentation tank is discharged, thereby protecting the biogas fermentation tank from negative pressure damage; at the same time, when the biogas fermentation tank is due to other reasons When a negative pressure is formed, air will enter the biogas fermentation tank from the top of the overflow chamber, through the top of the baffle, the hydraulic pressure chamber and the water inlet pipe, to balance the negative pressure and prevent the biogas fermentation tank from being damaged.

The ends of the water inlet pipe and the water outlet pipe are flanged so that the overflow device can be replaced after the overflow chamber and the lower outlet pipe are blocked by crystallization.

Compared with the prior art, the beneficial effects of the utility model are as follows: (1) A set of devices of the utility model can realize functions such as biogas fermentation discharge, stable pressure, and prevention of negative pressure damage, improve engineering construction quality, and save construction time; (2) The utility model is connected by flanges, which is easy to replace and ensures the continuous and normal operation of the biogas fermentation tank; (3) The utility model can significantly improve the level of biogas engineering equipment and engineering image by standardizing the overflow device of the biogas fermentation tank.

Therefore, the utility model overcomes the risk that the overflow pipe of the existing biogas fermentation tank easily causes the working pressure of the fermentation tank to be unstable, the pressure is too large or too small, and there is a risk of negative pressure destroying the biogas fermentation tank, and the overflow pipe should not be replaced after crystallization and blockage Due to the technical defects of the biogas fermentation tank, the overflow device provided by the biogas fermentation tank can stabilize the working pressure of the biogas fermentation tank, has the function of negative pressure protection, and is easy to replace.

Description of drawings

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

Fig. 2 is a schematic top view of the present invention.

In the figure: 1. water inlet pipe flange, 2. water inlet pipe, 3. water pressure chamber, 4. baffle, 5. water pressure chamber cover, 6. overflow chamber, 7. water outlet pipe, 8. water outlet pipe method Lan; 9. Atmospheric communication hole; 10. Overflow tank.

Detailed ways

Further describe the utility model in detail below in conjunction with embodiment, the utility model is not limited to described embodiment.

Embodiment one

The biogas fermentation tank discharge overflow device of this example is shown in Figure 1, is made up of water inlet pipe 2, overflow tank 10 and outlet pipe 7, is provided with baffle plate 4 in overflow tank 10 and overflow tank 10 is divided into Water pressure chamber 3 and overflow chamber 6, the top of water pressure chamber 3 and overflow chamber 6 are connected, the top of water pressure chamber 3 is provided with water pressure chamber cover plate 5, the top of overflow chamber 6 is provided with atmospheric communication hole 9, and the water inlet pipe 2 is located at the lower side of the hydraulic chamber 3, and the outlet pipe 7 is located at the bottom of the overflow chamber 6, and the ends of the inlet pipe 2 and the outlet pipe 7 are respectively provided with an inlet pipe flange 1 and an outlet pipe flange 8; 2 is connected to the biogas fermentation tank through the water inlet pipe flange 1.

The water pressure generated by the vertical height from the inner wall of the top of the water inlet pipe 2 to the top of the baffle plate 4 described in this example is the design pressure of the biogas fermentation tank, generally 3000pa to 5000pa, so the vertical height from the inner wall of the top of the water inlet pipe 2 to the top of the baffle plate 4 The height is generally 300mm to 500mm.

Above the atmospheric communication hole 9 at the top of the overflow bin 6 described in this example, a rain-shielding facility is arranged, and the area that the top of the overflow bin 6 communicates with the atmosphere is not less than the cross-sectional area of the outlet pipe.

Further explain the utility model by working process below:

When working, the biogas fermentation feed liquid is under the action of feed water pressure and air pressure, and the sewage enters the hydraulic chamber 3 from the water inlet pipe 2, and the water level in the hydraulic chamber 3 continues to rise. When it reaches the top of the baffle plate 4, the water level difference is generated The pressure is the maximum design pressure of the biogas fermentation tank; at this time, if the water level continues to rise, it will turn over the baffle plate 4 and enter the overflow chamber 6, and be discharged through the outlet pipe 7.

In this example, the top of the overflow bin 6 is provided with an atmospheric communication hole 9, so as to avoid the occurrence of siphon phenomenon when the biogas fermentation tank is discharged, thereby protecting the biogas fermentation tank from negative pressure damage; at the same time, when the biogas fermentation tank is formed due to other reasons During negative pressure, air will enter the biogas fermentation tank from the top of the overflow chamber 6, through the top of the baffle plate 4, the water pressure chamber 3 and the water inlet pipe 2, to balance the negative pressure and prevent the biogas fermentation tank from being damaged.

In this example, the ends of the water inlet pipe 2 and the water outlet pipe 7 are connected by flanges, so that after the overflow chamber and the lower water outlet pipe are blocked by crystallization, the overflow device can be replaced.

The discharge overflow device of the biogas fermentation tank in this example can stabilize the working pressure of the biogas fermentation tank, has the function of negative pressure protection, is easy to replace, can improve the quality of project construction, save construction time, and significantly improve the level of biogas engineering equipment and project image.

Claims (2)

1. A discharge overflow device for a biogas fermentation tank, mainly composed of a water inlet pipe (2), an overflow tank (10) and an outlet pipe (7), characterized in that a baffle is set in the overflow tank (10) (4) Separate the overflow tank (10) into a hydraulic chamber (3) and an overflow chamber (6), the top of the water pressure chamber (3) and the overflow chamber (6) are connected, and the top of the water pressure chamber (3) There is a water pressure chamber cover (5), the overflow chamber (6) is provided with an atmospheric communication hole (9), the water inlet pipe (2) is located at the lower side of the water pressure chamber (3), and the water outlet pipe (7) is located at Bottom of overflow bin (6). 2. The biogas fermentation tank discharge overflow device according to claim 1, characterized in that the ends of the water inlet pipe (2) and the water outlet pipe (7) are respectively provided with a water inlet pipe flange (1) and an outlet pipe method Lan (8); the water inlet pipe (2) is connected with the biogas fermentation tank through the water inlet pipe flange (1).