An internal circulation enhanced fully mixed flow anaerobic reactor

Abstract

The invention provides an internal circulation enhanced fully mixed flow anaerobic reactor, the reactor is provided with a water distribution area, a fully mixed area, a first separation area and a second separation area in sequence from bottom to top; the water distribution area is provided with a bottom plate, empty Inlet, water inlet pipe, hollow cone water distributor and arc-shaped baffle; the full mixing zone is equipped with return pipe, swirl baffle, lower riser and mud discharge pipe; the first separation zone is equipped with three-phase separator and overflow weir And the outlet pipe; the second separation zone is equipped with an upper riser, an outer separation cylinder, an inner separation cylinder and an air outlet pipe. The present invention respectively increases the tangential flow velocity and the axial flow velocity in the swirl mixing zone by setting three swirl flow baffles arranged in 120°rotation and the internal circulation structure, so as to enhance interphase mixing in the swirl mixing zone and reduce The effect of the hydraulic dead zone can effectively dilute the high-concentration influent, improve the volumetric efficiency of the reactor, and ensure the stable operation of the reactor.

Description

technical field [0001] The invention relates to an anaerobic bioreactor for organic wastewater treatment, in particular to an internal circulation enhanced fully mixed flow anaerobic reactor. Background technique [0002] At present, my country's water pollution problem is still serious. According to the 2014 "China Environmental Status Bulletin", the total annual discharge of wastewater chemical oxygen demand (COD) is 22.946 million tons, of which, industrial and agricultural sources of COD discharge accounted for 61.61%. , The discharge of these wastewater is not only a great waste of water resources, but also has a bad impact on people's living environment and health. A large part of COD in industrial wastewater comes from high-concentration organic wastewater, and anaerobic reactors, as a sharp tool for the degradation of high-concentration organic wastewater, have attracted much attention in the field of wastewater treatment. [0003] The COD of high-concentration organ...

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Problems solved by technology

However, traditional CSTR not only consumes a lot of energy, but also its mixing effect is not ideal. According to literature reports, the hydraulic dead zone of traditional CSTR is as high as 70%.

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