Axial-flow-type inverted inlet flow channel swirler

Abstract

An axial-flow-type inverted inlet flow channel swirler. The invention mainly aims to provide a cyclone separation device which can achieve axial liquid feeding, is small in size and is high in separation efficiency on micro oil drops. The axial-flow-type inverted inlet flow channel swirler is characterized in that an overflow pipe, a hollow conical pipe, a hollow cylindrical pipe and an enriching pipe are connected to each other successively from top to bottom and then are arranged in an inlet pipe, wherein the enriching pipe passes into a swirl chamber and is fixed. A spiral sheet, which continuously surrounds the hollow conical pipe and the hollow cylindrical pipe to the bottom of the inlet pipe, is fixed in the inlet pipe, wherein the spiral line at the outer edge of the spiral sheet is contacted with an inner wall of the inlet pipe, while the spiral line at the inner edge of the spiral sheet is respectively contacted with the outer walls of the hollow conical pipe and the hollow cylindrical pipe. At an opening which is formed at an intersection point of a flow guide channel formed by the spiral sheet and the bottom end of the inlet pipe, an inverted spiral channel is connected, wherein the rotational direction of liquid flowing in a flow channel in the inverted spiral channel is opposite to the rotational direction of liquid flowing in the flow guide channel formed by the spiral sheet. A liquid flow outlet of the inverted spiral channel is arranged in the swirl chamber.

Description

technical field [0001] The invention relates to a two-phase heterogeneous separation treatment device applied in the fields of petroleum, chemical industry, environmental protection and the like. Background technique [0002] At present, the devices used for two-phase heterogeneous separation mainly include cyclone separation, air flotation, filtration and membrane separation devices. However, these existing devices have their own advantages and disadvantages: cyclone separation has the advantages of small equipment volume, but its ability to remove small oil droplets is limited; air flotation has a small range of adaptability to oil concentration changes; filtration can better Realize the separation of oil-water two-phase, but for highly oily sewage, frequent backwashing is required to ensure the long-term stable operation of the equipment; the cost of membrane separation equipment is relatively high, and the requirements for medium conditions are relatively strict. The s...

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Problems solved by technology

However, these existing devices have their own advantages and disadvantages: cyclone separation has the advantages of small equipment volume, but its ability to remove small oil droplets is limited; air flotation has a small range of adaptability to oil concentration changes; filtration can better Realize the separation of two phases of oil and water, but for high oily sewage, frequent backwashing is required to ensure the long-term stable operation of the equipment; the cost of membrane separation equipment is relatively high, and the requirements for medium conditions are relatively strict

As a result, there is a practical problem of poor removal of fine oil droplets in the field of water treatment technology

Especially after the oilfield development enters the medium-high water-cut production period, with the continuous expansion of the polymer flooding scale, the production volume of the polymer-containing sewage increases year by year, the viscosity of the polymer-containing sewage is high, and the oil removal efficiency of the subsidence section in the surface process of the oilfield is low, and the filtration section is increased. The load will cause serious pollution of the filter material and deterioration of the filtered water quality.

Limits the application of conventional hydrocyclones in the field of filtration and separation of crude oil production fluid

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