Secondary separation cyclone

Abstract

The invention provides a secondary separation cyclone which is mainly used for solving the problem that the existing cyclone separator has a poor effect on separating small oil drops. The secondary separation cyclone is characterized in that: the lower end of a first-grade cyclone pipe is sequentially connected with a second-grade cone section and a second-grade underflow pipe; a cyclone separator is fixed in the cyclone pipe and is formed by connecting a second-grade overflow pipe, a second-grade overflow cone section, a spiral sheet fixing pipe and a second-grade liquid collecting port; a diversion spiral sheet is fixed outside the spiral sheet fixing pipe, and the contour of the diversion spiral sheet is in contact with the inner wall of the first-grade cyclone pipe; a first-grade overflow pipe is connected outside the second-grade overflow pipe, and an annular gap is formed between the two pipes so that a medium in a first-grade cyclone cavity overflows along the annular gap; and the straight pipe length of the first-grade overflow pipe is less than the straight pipe length of the second-grade overflow pipe, both the first-grade overflow pipe and the second-grade overflow pipepenetrate through an upper end cover, and the outer wall of the first-grade overflow pipe is in closed connection with a corresponding hole of the upper end cover. The separation cyclone can increasethe separation efficiency of small oil drops and can realize secondary separation.

Description

technical field [0001] The invention relates to a cyclone separation treatment device for sewage treatment in the fields of petroleum, chemical industry and environmental protection. Background technique [0002] At present, in the fields of petroleum, chemical industry and environmental protection, the rapid separation methods for oil-water two-phase separation mainly include cyclone separation, air flotation, filtration and membrane separation. Among them, the air flotation method has a small range of adaptability to changes in oil concentration; although the filtration method can achieve the separation of oil and water phases, it requires frequent backwashing for high oily sewage to ensure long-term stable operation of the equipment; membrane separation The equipment cost of this method is relatively high, and the requirements for medium conditions are relatively strict. In comparison, the cyclone separation method is a relatively common method because the equipment used...

AI Technical Summary

Problems solved by technology

Due to the high viscosity of the polymer-containing sewage, the oil removal efficiency of the subsidence section in the oil field surface process is low, which increases the load of the filter section, resulting in serious pollution of the filter material and deterioration of the filtered water quality

Polymers have also been seen in more and more water flooding sewage stations, causing the quality of treated water to deteriorate and it is difficult to meet the requirements of water injection

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