Air-tight bottom support stirring device of efficient anaerobic fermentation tank

Abstract

An air-tight bottom support stirring device of an efficient anaerobic fermentation tank belongs to the technical field of environmental protection equipment. The device comprises a stirring shaft I, abearing seat, a bottom bearing, a shaft sleeve, a sleeve, a top gland and a pneumatic sealing device. The bearing seat is arranged at the bottom in a tank body. The bottom bearing is arranged on theinner ring of the bearing seat. The shaft sleeve mounted at one end of the stirring shaft I is arranged in the bottom bearing. The sleeve sleeves the stirring shaft I, one end is connected with the outer ring of the bearing seat, and the other end is connected with the top gland which sleeves the stirring shaft I. A settling cavity is formed between the sleeve and the inner ring of the bearing seat. An air cavity is formed between the sleeve and the top gland. The pneumatic sealing device is arranged on the stirring shaft I in the air cavity. An air inlet is formed in the top gland, and an airpipe connected with an air source is mounted at the air inlet. The other end of the stirring shaft I is connected with a stirring shaft II of the anaerobic fermentation tank through a flange. A drainage pipe communicated with the settling cavity is arranged at the bottom of the tank body. According to the invention, the load of the tank top is reduced, and the safety of the tank top is improved.The pneumatic sealing device effectively prevents fine sand from entering the bottom bearing.

Description

technical field [0001] The invention belongs to the technical field of environmental protection equipment, and in particular relates to an air-tight bottom support stirring device for an efficient anaerobic fermentation tank. Background technique [0002] According to statistics from the Ministry of Agriculture, my country produces about 3.8 billion tons of livestock and poultry manure in one year, 40% of which have not been effectively utilized, seriously restricting the healthy development of my country's livestock and poultry breeding industry. Livestock and poultry manure is a pollutant if it is not treated. If it is used for anaerobic fermentation to produce biogas, clean energy can be obtained. The biogas slurry and biogas residue after the reaction are high-quality fertilizers. The scientific and reasonable resource utilization of livestock and poultry manure can effectively improve the ecological environment, increase the economic benefits of farms, and realize the h...

AI Technical Summary

Problems solved by technology

Anaerobic tank materials have high solid content and generally contain fine sand. In order to protect the bottom bearing, sealing protection must be provided. Conventional bottom bearings mostly use rotary bearings and are equipped with mechanical seals. The bottom support operates under sewage, and the working environment is harsh. The sealing is easy to fail, which makes the mixing system unable to operate, and the maintenance of the anaerobic tank needs to empty the whole tank of raw materials, which is extremely poor in operability, so the application of the bottom support on the anaerobic reactor is still not common

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