Three-phase biological fluidized bed for treating refinery wastewater

Abstract

A three-phase biological fluidized bed for treating refinery wastewater is of an inner and outer cylinder structure and is mainly composed of an anaerobic facultative down-flow area, an aerobic up-flow area and a three-phase separation area, wherein the three-phase separation area is located at the top of the inner and outer cylinder structure; the anaerobic facultative down-flow area comprises adown-flow area D1, a down-flow area D2 and a down-flow area D3, the down-flow area D3 is an inner cylinder, and the down-flow area D1 and the down-flow area D2 are formed by a gap between the outer cylinder and the inner cylinder and are oppositely arranged; a water inlet pipe is arranged on the inner cylinder, and a filter screen is arranged in the down-flow area below the water inlet pipe; the aerobic up-flow area comprises an up-flow area R1 and an up-flow area R2, the up-flow area R1 and the up-flow area R2 are formed by a gap between the outer cylinder and the inner cylinder and are oppositely arranged, an air inlet pipe and an impeller are arranged at the bottom of the up-flow area, and a carrier is placed in the up-flow area; and the three-phase separation area comprises a separation area F and is mainly composed of a three-phase separator. The three-phase biological fluidized bed for treating refinery wastewater can effectively eliminate oil components in wastewater, and has the advantages of strong impact load resistance, good mass transfer effect and blockage prevention.

Description

technical field [0001] The invention relates to oil refining wastewater treatment equipment, in particular to a three-phase biological fluidized bed for treating oil refining wastewater, and belongs to the technical field of wastewater treatment. Background technique [0002] At present, the treatment methods for oil refinery wastewater still follow the "three old" processes adopted since the 1970s, namely oil separation, flotation, and aeration. With the development of the refining process, in order to ensure the standard discharge, combined with the biochemical treatment of wastewater, additional processes such as secondary flotation, biological contact oxidation, flocculation and sedimentation, etc., but the process is complex in composition, high in cost, large in area, and difficult to control and operate. Difficulties, the development of short-process process equipment for oil refinery wastewater is imminent. [0003] The three-phase fluidized bed is a three-phase gas...

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Problems solved by technology

[0006] However, the above-mentioned three-phase biological fluidized bed for treating high-concentration organic wastewater, the use of microporous aerators and oscillating discs will have the problems of large bubbles and poor air flotation effect, and the wastewater purification treatment effect and ammoniation efficiency are still to be determined. improve

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