An anoxic denitrification fluidized bed treatment device

Abstract

The invention relates to an anoxic denitrification fluidized bed treatment device. The device comprises a reactor main body (4), an ultrasonic oscillator (including a vibration plate (19)) and a nitrogen producing system (5). The water inlet (20) of the circulating pump (3) is located in the filter screen (17) near the tower head, and the pore size of the filter screen (17) is slightly smaller than the diameter of the biological filler, which effectively prevents the biological filler in the reactor from entering the circulation system; An ultrasonic oscillator, which utilizes the direct and indirect effects of the ultrasonic oscillator's cavitation, direct inflow and acceleration in the liquid on the liquid and dirt, so that the sludge originally attached to the filter screen (17) is dispersed. , peeling off to achieve the purpose of cleaning the filter screen (17), so that the circulation system can run stably for a long time; the water flow distributor (9) installed at the bottom of the main body (4) of the reactor can effectively solve the problem of uneven distribution of water in the main body (4) of the reactor problems, avoid short circuits in the water flow, and increase the load of organics and nitrate removal.

Description

technical field [0001] The invention relates to the technical fields of chemical industry and environmental protection, in particular to an anoxic fluidized bed device for waste water treatment, especially an anoxic denitrification fluidized bed treatment device. Background technique [0002] In recent years, nitrogen pollution in the field of water treatment has become one of the social hot spots. With the increasingly serious problem of eutrophication in China's water bodies and the improvement of future wastewater discharge standards, the removal of nitrogen in water has become one of the key issues in the field of water treatment. How to remove nitrate nitrogen from water economically, efficiently and safely, and develop an efficient and stable wastewater enhanced denitrification technology has become an urgent technical demand in the field of wastewater treatment. [0003] Today's wastewater treatment is faced with high standard discharge requirements, such as the Unit...

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Problems solved by technology

[0009] For the defects existing in the prior art, the purpose of the present invention is: first, in order to solve the clogging of the traditional upward flow water distribution device of the anoxic fluidized bed, improve the uniformity of water distribution and increase the effective utilization rate of the fluidized bed volume , specially designed and developed a water flow distributor with strip-shaped channels; second, in order to solve the problem that some biological fillers are mixed into the circulation pipeline, causing pipeline blockage or even damage to the pump head, and the problem of filler loss during backwashing, the top of the reactor body is used The filter screen intercepts the biological filler to completely isolate the circulating water pipeline from the biological filler. At the same time, the filter screen is cleaned regularly by an ultrasonic oscillator to avoid a large amount of washed out sludge from clogging the mesh and realize the long-term stable automatic operation mode of the system.

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