A sedimentation device for three-phase separation of sewage

Abstract

The invention discloses a precipitation device for three-phase sewage separation. The precipitation device comprises an enclosure piece, a mud and water separation component, a degassing system, a water distribution channel, a water distribution tank, a collection and drainage tank and a mud bucket, wherein the mud and water separation component is an inclined plate group or pipe group; the mud bucket is positioned below the mud and water separation component and is communicated with the mud and water separation component; a mud outlet of the mud bucket can be opened. According to the precipitation device, gas is separated from the sewage through the degassing system, the residual sewage is subjected to the mud and water separation through the inclined plate group or pipe group, water is drained through the collection and drainage tank, and mud drops out of the mud outlet of the mud bucket. Because the muddy water separation component is the inclined plate group or pipe group, the total flow area is far larger than that of a narrow slit of a three-phase separator, and the sewage treatment flow of an anaerobic reactor is increased through the precipitation device at the same mud and water raising flow velocity; moreover, the precipitation device can precipitate in the aerobic activated sludge process treatment, and a precipitation unit is not required to be additionally arranged; and therefore, the occupied area is reduced, power equipment is not required to be subjected to sludge recycle, and the cost and the energy consumption are reduced.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a sedimentation device for three-phase separation of sewage. Background technique [0002] In the process of sewage treatment, it is necessary to separate the three phases of gas, liquid and solid for sewage. For anaerobic sewage treatment, three-phase separators are generally used in anaerobic reactors. [0003] An existing three-phase separator consists of multiple inverted V-shaped devices, such as figure 1 As shown, the sewage flows from bottom to top, and the gas is collected in the gas-gathering area 01, while the muddy water can only flow through the narrow gap 02 between the inverted V-shaped plates and enter the upper sedimentation area 04, which is realized by the gravity of the muddy water itself. For the separation of mud and water, the supernatant enters the outlet tank 03 on the top and is discharged, and the sludge returns to the reaction zone below throu...

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Problems solved by technology

[0004] When the aerobic activated sludge method is used for sewage treatment, it is necessary to set up a separate sedimentation tank or sedimentation area outside the aeration area to realize the separation of mud and water. The sludge in the sedimentation area is then transferred to the aeration area. Therefore, not only the sedimentation tank occupies a large sewage treatment area, but also the power equipment increases the cost and energy consumption

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