High-speed and down-flow type sludge back-mixing anaerobic reactor

Abstract

A high-speed and down-flow type sludge back-mixing anaerobic reactor is disclosed. The main body is provided with a down-flow reaction area, an up-flow reaction area, an air-solid-liquid separation area and a water outlet area from the bottom to the top. The down-flow reaction area is formed by relative arrangement of a bucket shape body in the lower part and a taper cover in the upper part, a gap is saved between the bucket shape body and the taper cover, and the up-flow reaction area is above the taper cover; the air-solid-liquid separation area is provided with a three-phase separator, a water outlet weir is arranged above the water outlet area, and a water outlet pipe is arranged on the water outlet weir; a sludge reverse lifting backflow device is arranged on the top part of the main body, the device comprises an air-water separating tank, a sludge reverse lifting pipe and a backflow pipe, the sludge reverse lifting pipe is arranged between the air-water separating tank and the bottom of the down-flow reaction area, and the backflow pipe is arranged between the air-water separating tank and the bottom of the up-flow reaction area. The mass transfer of the sludge in the reactor is in a high-speed, reverse and down-flow mode, the mass transfer is stronger, the loss of sludge is maximally reduced, and the processing efficiency is prominently improved.

Description

technical field [0001] The invention relates to an anaerobic reaction device used in the biochemical treatment stage of sewage treatment, belonging to the technical field of anaerobic reaction. Background technique [0002] Various traditional anaerobic reactors used at this stage can be classified as upflow anaerobic reactors. This type of anaerobic reactor has a simple structure and is more convenient to operate. Function, the normal upflow velocity is between 0.1-10 m / h, and the water circulation is used to drive the sludge for mass transfer during start-up and operation to achieve the purpose of degrading pollutants. [0003] However, due to the upflow principle of this type of anaerobic reactor, the muddy water circulates from the bottom to the upflow, resulting in the loss of anaerobic sludge in the reaction zone, and the sludge naturally settles to the bottom under the influence of gravity, resulting in the accumulation of sludge at the bottom, and the sludge Mud is ...

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Problems solved by technology

[0003] However, due to the upflow principle of this type of anaerobic reactor, the muddy water circulates from the bottom to the upflow, resulting in the loss of anaerobic sludge in the reaction zone, and the sludge naturally settles to the bottom under the influence of gravity, resulting in the accumulation of sludge at the bottom, and the sludge Mud is not used

Therefore, the upflow anaerobic reactor cannot solve the problem of sludge accumulation at the bottom, and has the disadvantages of water flow short circuit, poor mass transfer and anaerobic sludge loss during the upflow process, and is not suitable for sewage treatment with high concentration water quality and poor biochemical properties , which is very inefficient even when applied

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