An oil-water spiral guide separation device

Abstract

The invention provides a spiral flow guide oil-water separation device, which comprises a separation pipe, a spiral flow generator and a separation device, wherein the separation pipe is used for mounting each flow guide part; one end of the separation pipe is a mixed liquid inlet end, and the other is a closed separated liquid discharge end; an oil outlet pipe overlapped with the shaft axis of the separation pipe and a water outlet pipe tangent to the pipe wall of the separated liquid outlet end are arranged at the separated liquid outlet end; the spiral flow generator is arranged in the mixed liquid inlet end, and consists of flow guide vanes which symmetrically generate spiral flow; the separation device is arranged in the separated liquid outlet end, and comprises multiple equal-height separation sleeves which are arranged at intervals and coaxial with the separation pipe; the separation sleeves gradually get close to the top end of the separated liquid outlet end from the innermost layer to the outermost layer. According to the device, influence on the axial distribution of an original fluid velocity profile in a liquid inlet pipeline can be reduced as much as possible, specific velocity distribution under the action of viscous force can also be formed, a swirling flow field is coupled to further improve the oil-water separation effects, and the device is particularly suitable for oil-water separation of thick oil mixed liquor with a higher viscosity coefficient.

Description

technical field [0001] The invention relates to the field of fluid mechanics, in particular to an oil-water spiral diversion separation device for pre-dehydrating crude oil with high water content. Background technique [0002] In the oil extraction industry, as most oilfield development enters the high water cut stage in the middle and late stages, the water content of crude oil production fluid continues to increase. The water content in the produced fluid not only causes rapid equipment aging during the storage, transportation and refining process of crude oil, increases the operating load, and increases energy consumption, but also easily causes tower flushing, corrosion and blockage of pipelines, abnormal operation of atmospheric and vacuum distillation towers, and catalyst damage. to serious consequences such as poisoning. Therefore, crude oil must be dehydrated or roughly separated before being exported, and the moisture content is required not to exceed 0.5%. There...

AI Technical Summary

Problems solved by technology

This traditional process can effectively remove most of the suspended water in crude oil, and the equipment is simple and easy to operate; however, there are problems such as large-scale settling equipment, long-time-consuming settling process, high energy consumption due to heating, and the existence of high energy consumption due to the addition of a large amount of chemical agents. Environmental issues

In addition, there are other new processes or devices, such as the use of three-phase separators or hydrocyclones for pre-dehydration, but the dehydration efficiency and adaptability are still not ideal; and when the incoming liquid pressure is low, energy needs to be added to increase the pressure To meet the dehydration requirements

In addition, for the deflector swirl technology that has appeared in recent years, there are also unfavorable factors such as high pressure loss; therefore, in the current energy shortage and the country's vigorous promotion of green environmental protection, it is urgent to improve this traditional process or propose a new one. (pre) dehydration device or oil-water separation device to meet the requirements of energy saving and emission reduction, especially for high water content crude oil production fluid

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