Aerobic biological fluidized bed device combining enriched oxygen aeration and oxygen filling method thereof

Abstract

The invention discloses an aerobic biological fluidized bed device combining enriched oxygen aeration. The aerobic biological fluidized bed device comprises a reaction tower, a riser, an air aerator, an oxygen aeration device, an oxygen compressor, an oxygen source, a draught fan, a flow control device, a first electromagnetic valve and a second electromagnetic valve, wherein the air aerator is arranged at the bottom of the reaction tower; the input end of the air aerator is connected with the output end of the first electromagnetic valve; the input end of the first electromagnetic valve is connected with the output end of the draught fan; the oxygen aeration device is arranged at the lower part of an annular space region; the input end of the oxygen aeration device is connected with the output end of the second electromagnetic valve; the input end of the second electromagnetic valve is connected with the output end of the oxygen compressor; the input end of the oxygen compressor is connected with the oxygen source; the flow control device is respectively connected with the output end of the first electromagnetic valve, the control end of the second electromagnetic valve, and an oxygen concentration probe. Meanwhile, an oxygen filling method of the device is also disclosed. The device and the method capable of improving the dissolved oxygen quantity of an airlift internal circulating aerobic biological fluidized bed are achieved.

Description

technical field [0001] The invention relates to an aerobic biological fluidized bed device combined with oxygen-enriched aeration and an oxygenation method thereof, belonging to the fields of environmental engineering and energy engineering. Background technique [0002] Biological fluidized bed sewage treatment technology began in the 1970s. It has the advantages of high biomass concentration, less microorganisms, good liquid-solid contact transfer characteristics, and not easy to block. Biological fluidized bed technology has been applied in the anaerobic sewage treatment process. With the improvement of environmental requirements, biological fluidized bed technology is expected to be further extended to aerobic sewage treatment, such as coal, biomass gasification coke washing wastewater depth Treatment (COD, ammonia nitrogen removal) and other occasions. [0003] The bioreactor is the core of the entire wastewater biological treatment process. The aerobic biological flu...

AI Technical Summary

Problems solved by technology

Direct use of oxygen-enriched aeration on the air-lift internal circulation biological fluidized bed reactor will lead to a large oxygen consumption, and when the oxygen content of the sewage is sufficient, a relatively high oxygen flow is still required in order to form an internal circulation. amount, which will lead to an increase in operating costs

[0009] In summary, there is still a lack of a device and method that can increase the oxygen solubility of an airlift internal circulation aerobic biological fluidized bed

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