Zero-tail-gas composting reaction system with sludge dewatering function

Abstract

The invention discloses a zero-tail-gas composting reaction system with a sludge dewatering function. The system comprises a composting reactor tank body, a heat exchange box body and a decompositionreaction tank; an exhaust pipe is connected to the upper end of the composting reactor tank body, penetrates through the heat exchange box body to be connected with the decomposition reaction tank; and the heat exchange box body is provided with a sludge guide inlet and a sludge guide outlet. The system has the advantages that the exhaust pipe at the upper end of the composting reactor tank body penetrates through the heat exchange box body, sludge makes contact with the exhaust pipe for heat exchange, water in the sludge can be evaporated from the sludge due to heat exchange, so that the water content of the sludge is decreased, heat in a composting reactor is reasonably utilized in the whole sludge dewatering process, the resource utilization rate is high, and the practicability is high;and water vapor passing through the exhaust pipe of the heat exchange box can be condensed into a liquid state and is introduced into the decomposition reaction tank, liquid water can be absorbed andcan also be properly guided out, and residual ammonia gas and other gases are completely absorbed by decomposed materials which are fermented for the second time.

Description

technical field [0001] The invention relates to the technical field of composting reaction, in particular to a zero-tail gas composting reaction system with sludge dehydration. Background technique [0002] The sewage treatment plant is the sewage (waste) water discharged from the pollution source. Due to the high total amount or concentration of pollutants, it cannot meet the requirements of the discharge standard or the environmental capacity requirements, thereby reducing the quality of the water environment and the functional goals. Places of artificial intensive treatment. Sludge refers to the solid, semi-solid and liquid waste produced by sewage treatment, which contains a large amount of organic matter, heavy metals, pathogenic bacteria and pathogenic bacteria, etc. If it is discharged without treatment, it will cause serious pollution to the environment. Therefore, certain treatment is required before the sludge is discharged. The general requirements for sludge tre...

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Problems solved by technology

However, to reduce the moisture content of the treated sludge will inevitably consume a larger amount of flocculant and electric energy, which will inevitably increase the operating cost of the sewage treatment plant.

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