Internal circulation anaerobic reactor

Abstract

The invention provides an internal circulation anaerobic reactor. The anaerobic reactor comprises an upper reactor and a lower reactor which are connected up and down. The lower reactor comprises a water inlet and distribution system and a sludge feed / discharge port which are positioned at the bottom of the anaerobic reactor, and the water inlet and distribution system adopts a dotted rotational flow water distributor. The anaerobic reactor further comprises a first gas lifting pipe extending from the top end of a lower three-phase separator to a gas-liquid separator, a second gas lifting pipeextending to the gas-liquid separator from the top end of an upper three-phase separator, and a mixed liquid backflow pipe extending from the bottom end of the gas-liquid separator to a mixing area.Liquid internal circulation can be formed in the anaerobic reactor, sludge cannot be generated at the gas-liquid separator, and continuous and stable operation of equipment is facilitated. The dottedrotational flow water distributor disclosed by the invention can realize a dotted rotational flow effectAZX, and can effectively avoid sludge loss caused by mixed precipitation accumulation and corruption of granular sludge and suspended solids in the mixing area of the internal circulation anaerobic reactor.

Description

Technical field [0001] The invention relates to the field of sewage treatment, in particular to an internal circulation anaerobic reactor. Background technique [0002] Anaerobic reactor is an efficient biofilm treatment method that uses anaerobic treatment process. It uses materials with large surface areas such as sand as carriers. Anaerobic microorganisms form membranes on the surface of sand or other carriers and flow in sewage State, the microorganisms and the organic matter in the sewage are contacted to adsorb and decompose the organic matter, so as to achieve the purpose of treatment. Under the premise of separating the solid residence time and hydraulic residence time, the third-generation anaerobic reactor enables the solid and liquid phases to fully contact, which can not only maintain a large amount of sludge, but also enable the wastewater and activated sludge to be fully mixed. Contact in order to achieve a truly efficient purpose. [0003] With the continuous in-de...

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Problems solved by technology

[0004] In order to effectively solve the problem of accumulation of silt and sludge in the gas-liquid separator in the mixing zone of the third generation reactor, the object of the present invention is to provide a kind of internal circulation anaerobic reactor

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