Self-adaption variable-flow crude oil degassing method and device

Abstract

The invention relates to a self-adaption variable-flow crude oil degassing method and device. The self-adaption variable-flow crude oil degassing device comprises a shell, a main flow separation tube and branch flow separation tubes distributed at the periphery of the main flow separation tube, wherein the branch flow separation tubes are communicated with the main flow separation tube through branch flow tubes. According to the self-adaption variable-flow crude oil degassing device disclosed by the invention, the main flow separation tube and the branch flow separation tubes can be specially combined to be self adaptive to inlet crude oil flow fluctuation; to flow change, the branch flow separation tubes are under an allowed work condition all the time by a special structure of a spin generator, a reversed cone and the branch flow tubes in a main flow separator; thus, high-efficiency degassing of crude oil entering to the branch flow separation tubes can be guaranteed, a quick high-efficiency degassing function and an automatic liquid level adjusting function are achieved, and downstream equipment pressure is reduced; the self-adaption variable-flow crude oil degassing device has a simple structure and convenience in installation, can effectively reduce floor area and makes up defects in the prior art.

Description

technical field [0001] The invention relates to the field of gas-liquid separation equipment, in particular to the technical field of oil and gas exploitation equipment, in particular to a method and device for degassing crude oil with adaptive variable flow. Background technique [0002] Crude oil extracted from oil wells is rich in various impurities such as gas, liquid, and solid. Before the crude oil is exported, it needs to be desanded, degassed, and dehydrated. At present, the physical technology for two-phase or three-phase separation mainly includes gravity sedimentation , cyclone separation, coalescence filtration, membrane separation and other methods. For gravity sedimentation, it can separate gas, liquid, and solid phase substances, but it takes a long time for separation, and it cannot be well adapted to the working conditions of large fluctuations in the content of each component in crude oil production, resulting in unstable operation. Coalescing filtration i...

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Problems solved by technology

For gravity sedimentation, it can separate gas, liquid, and solid phase substances, but it takes a long time for separation, and it cannot be well adapted to the working conditions of large fluctuations in the content of each component in crude oil production, resulting in unstable operation. Coalescing filtration is separated by permeability, which has a narrow scope of application and short service life. Similarly, membrane separation also has problems such as easy pollution, short service life, and easy clogging; cyclone separation technology is suitable for The rapid removal process of a large amount of (oil) water, but for a specific cyclone, it must work at a certain inlet flow rate to function stably, which has certain limitations

[0003] Patent: CN201610704875.9 discloses a gravity sedimentation gas-liquid separation method. This patent combines gravity separation and membrane separation for oil and gas separation. The disadvantage is that the equipment size is large and the processing time is long; A membrane separation method and a membrane separation device can reduce the adsorption of membrane pollutants contained in the water to be treated on the surface of the membrane when membrane separation is performed on the water to be treated. The disadvantages are that the membrane is easy to block and has a short service life.

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