An anoxic fluidized bed device for treating industrial wastewater

Abstract

The invention relates to an anoxic fluidized bed device for treating industrial waste water. The device comprises an anoxic fluidized bed device main body (1), and a self-cleaning filter device (10) is established in the tower head (1-2) of the anoxic fluidized bed device main body (1), wherein the filter screen (25) The mesh diameter is slightly smaller than the diameter of the biological filler, which effectively prevents the biological filler in the main body (1) of the anoxic fluidized bed device from being discharged out of the circulation system, and the relative movement between the metal brush (23) and the filter screen (25) makes The sludge originally attached to the filter screen (25) is broken up and stripped to achieve the purpose of cleaning the filter screen (25), so that the long-term stable operation of the circulation system; the main body (1) of the anoxic fluidized bed device (1- 1) The water flow distributor (19) at the inner bottom effectively solves the problem of uneven water distribution in the main body (1) of the anoxic fluidized bed device, avoids short circuit of water flow, and increases the removal load of organic matter and nitrate.

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 treating industrial waste water. 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 United States, Canada and other countries, the effluent standar...

AI Technical Summary

Problems solved by technology

[0006] First of all, the water inlet pressure of the downward flow reactor is relatively high, which not only greatly increases the operating cost, but also is not conducive to operation and maintenance;

[0007] Secondly, the water distribution system of the conventional upflow anoxic denitrification fluidized bed treatment device needs to be cleaned frequently to keep it smooth, especially when the reactor is overloaded, the phenomenon of filter material blockage is very likely to occur, which affects the distribution of influent water and The effect of wastewater treatment will have adverse effects;

[0008] Third, the anoxic fluidized bed needs to be backwashed regularly to remove the thicker biofilm attached to the surface of the filler. During the combined air-water backwash process, a large number of small and light fillers will flow into the circulation pipeline, causing Pipeline blockage or even damage to the pump head will seriously affect the long-term stable operation of the reactor

Images