Gas-liquid blending and stirring device of sewage-sludge complete mixing type anaerobic fermentation tank and treatment method thereof

Abstract

The invention discloses a gas-liquid blending and stirring device of a sewage-sludge complete mixing type anaerobic fermentation tank and a treatment method thereof, wherein the upper end of an anaerobic fermentation tank is connected with a trapezoidal tank cover, and the lower end thereof is connected with an inverted triangular tank bottom, the top left side of the anaerobic fermentation tank is connected with a safety valve, the cavity of the anaerobic fermentation tank is connected with a gas lifting flow guide device, and the lower end of the gas lifting flow guide device is connected with a gas collection and flow guide bell mouth; a gas-liquid blending device is arranged below the liquid level of the anaerobic fermentation tank, a circular stirring pump and a primary liquid feeding pump are installed on the ground at the outer side of the anaerobic fermentation tank, the outlets of the circular stirring pump and the primary liquid feeding pump are connected with the gas-liquid blending device, the inlet of the circular stirring pump is connected with one side of the inverted triangular tank bottom, and the other side of the inverted triangular tank bottom is connected with a mud discharge pipe; and the inlet of the primary liquid feeding pump is connected to a feeding pool. The gas-liquid blending and stirring device disclosed by the invention has the advantages of reinforcing the stirring strength, enhancing the blending effect of the material and strain, improving the treatment effect, having a small volume and saving the occupation area. The interior of the anaerobic fermentation tank needs no maintenance; furthermore, the gas-liquid blending and stirring device has a simple structure and convenience for installation, so that the device can be extensively applied in the sewage and sludge treatment industry.

Description

technical field [0001] The invention relates to a fermentation system for anaerobic fermentation treatment of sewage and sludge and other biological reactions, in particular to a gas-liquid mixing and stirring device and a treatment method for a fully mixed anaerobic fermentation tank of sewage sludge. Background technique [0002] Most of the existing high-concentration organic and high SS (suspended solids) industrial wastewater in my country and the remaining sludge of urban sewage plants use complete mixed anaerobic fermentation in the anaerobic fermentation process, and use anaerobic fermentation microorganisms to convert organic matter in wastewater into Bioenergy-biogas (the main component is methane), reducing the concentration of organic matter and organic SS in wastewater. In order to pursue higher volume removal efficiency, the mixing degree of materials and bacteria has become a key technology to improve efficiency, especially for large anaerobic fermentation tank...

AI Technical Summary

Problems solved by technology

[0005] Hydraulic agitation is generally realized by the external reflux of the water pump. The agitation intensity and the disturbance range in the tank are small. Different density flow and channel flow are often formed in the tank. The stagnation zone and the sub-detention zone are relatively large, that is, it cannot be well realized. Fully Mixed Defects

[0006] Gas stirring: the biogas produced by the anaerobic tank itself is used, and the gas compressor is used to press it into the tank close to the bottom of the tank, which can better realize the stirring process, but there is a defect of excessive power consumption

Images