Multi-spin gravity drive type oil-water agglomeration separation tank

Abstract

The invention relates to a multi-spin gravity drive type oil-water agglomeration separation tank, and mainly aims at providing a simple device used for treating oil field producing liquid and ground sewage to realize the oil-water efficient and fast separation. The multi-spin gravity drive type oil-water agglomeration separation tank is characterized in that the inside of a separation tank body isdivided into an air floating cavity, an inlet cavity, an overflow cavity, a spiral agglomeration cavity and a gravity settlement cavity; a double-pipe coil type air floater, six multi-stage variable-diameter agglomeration inner cores and an annular speed reduction plate are arranged inside the tank body; the six multi-stage variable-diameter agglomeration inner cores are in circumferential uniform distribution; a bottom flow opening of each multi-stage variable-diameter agglomeration inner core points to a direction opposite to the inner circle center of the tank body; the multi-stage variable-diameter agglomeration inner core comprises a center pipe, a spiral pipe and a connecting pipe; the spiral pipe is a variable-diameter pipe; the pipe diameter from an inlet to the bottom flow opening is gradually reduced; the upper 1 / 3 part of the spiral pipe is a spiral agglomeration section; the lower 2 / 3 part is a spiral separation section; the lower side of the spiral pipe is communicated with the center pipe through a connecting pipe; the annular speed reduction plate is formed by welding an inclination plate with a center post.

Description

technical field [0001] The invention relates to a device used in the fields of petroleum, petrochemical, chemical industry, environmental protection and the like for pre-separation of oilfield production fluid and sewage treatment. Background technique [0002] At present, most oil fields in my country have entered a high water-cut development cycle, and the difficulty and cost of producing liquid water treatment have increased. The original traditional separation equipment in the oil field, mainly vertical settling tanks and hydrocyclones, has great disadvantages. It is difficult for the vertical settling tank to separate fine oil droplets effectively only by gravity, which makes the separation rate of the settling tank drop significantly, and the separation rate in some processing stations is only 30%-50% of the design rate; The hydrocyclone has poor adaptability when the particle size of the oil droplets is small. After separation, the water phase has a high oil content ...

AI Technical Summary

Problems solved by technology

The invention solves the problems of large floor space, slow separation rate, low separation efficiency and inapplicability to separation of oil-water mixture with small oil droplets in conventional gravity settling equipment.

At the same time, it makes up for the disadvantages of the cyclone separation equipment, such as small processing capacity, unstable processing, greater influence by operating parameters, and high requirements for operators.

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