Anoxic denitrification fluidized bed treatment apparatus

Abstract

The invention relates to an anoxic denitrification fluidized bed treatment apparatus, which comprises a reactor main body (4), an ultrasonic wave oscillator (containing a vibration plate (19)) and a nitrogen generation system (5), wherein the water inlet (20) of a circulation pump (3) is positioned in a filtration screen (17) near a tower head, the pore size of the filtration screen (17) is slightly smaller than the diameter of a biological filler so as to effectively prevent the biological filler in the reactor from entering a circulation system, the ultrasonic wave oscillator is arranged nearby, sludge originally attached to the filtration screen (17) is dispersed and peeled off through the direct action and the indirect action such as the cavitation effect, the direct inflow effect andthe acceleration effect of the ultrasonic wave oscillator on liquids and dirt so as to clean the filtration screen (17) to make the circulation system operate stably for a long time, and with a waterflow distributor (9) arranged on the bottom portion of the reactor main body (4), the problems of non-uniform influent distribution of the reactor main body and the like can be effectively solved, theshort circuit of water flow can be avoided, and the removal load of organic matters and nitrates can be improved.

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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