Oil field comprehensive sewage treatment device

Abstract

The invention provides an oil field comprehensive sewage treatment device. A chemical feed pipe is arranged below a water inlet pope; an air floating tank is arranged on the other side of an oil separation tank; an inclined plate is arranged in the air floating tank; a sedimentation tank is arranged on the right side of the air floating tank; a scraper conveyor is arranged on the upper sides of the sedimentation tank and the air floating tank; an oil collection tank is arranged at the terminal end of a scraper of the scraper conveyor; the bottom of the oil collection tank is connected with an oil collection pump through a pipeline; the sedimentation tank is provided with a water outlet weir plate; a discharge tank is arranged on the outer side of the water outlet weir plate; the bottom of the sedimentation tank is connected with an air floating system through a pipeline; a water outlet pipe of the air floating system is connected with a dissolved gas release pipe. The oil field comprehensive sewage treatment device, aiming at the characteristic of high treatment difficulty of oil filed settled sewage, rinse water of water injection main lines and water for well-flushing, is short in treatment time and hydraulic retention time through crude oil separation, flocculant adding, air floating, sedimentation and matching with the inclined plate for treatment, can realize crude oil extraction and sludge separation in sewage, has the advantages of stable outlet water quality, system sludge minimization, small equipment investment, small floor space and no backflushing, and is beneficial to promotion and application.

Description

Technical field: [0001] The invention relates to the technical field of sewage treatment, in particular to an oilfield comprehensive sewage treatment device. Background technique: [0002] Oilfield sewage treatment generally adopts the sedimentation filtration process, which settles the muddy water impurities in the sewage to the bottom through the sedimentation tank, and the settled water enters the filter tank for filtration. The problem of the above process is that the treatment process takes a long time and requires a large investment. At the same time, the follow-up treatment such as There is no more suitable method for the sludge in the settling tank and the crude oil floating on the upper part. At the same time, the recovery and treatment of the flushing water of the water injection trunk line and the well flushing water have always been a major problem in the treatment of secondary pollution of oilfield water quality. Invention content: [0003] In order to solve t...

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Problems solved by technology

[0002] Oilfield sewage treatment generally adopts the sedimentation filtration process, which settles the muddy water impurities in the sewage to the bottom through the sedimentation tank, and the settled water enters the filter tank for filtration. The problem of the above process is that the treatment process takes a long time and requires a large investment. At the same time, the follow-up treatment such as There is no more suitable method for the sludge in the settling tank and the crude oil floating on the upper part. At the same time, the recovery and treatment of the flushing water of the water injection trunk line and the well flushing water have always been a major problem in the treatment of secondary pollution of oilfield water quality.

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