T-shaped pipe network three-stage axial flow gas-liquid separation device and real-time control system

Abstract

The invention provides a three-stage axial flow gas-liquid separation device of a T-shaped pipe network and a real-time control system, which are applied to deep and efficient degassing of gas-containing well liquid. A first-stage axial flow degasser adopts a horizontal columnar single pipe body and implements first-stage four-strand axial flow rapid degassing operation to remove most liquid phaseof gas-containing well liquid to form first-stage gas flow and first-stage liquid flow, and a second-stage rotational flow degasser adopts a vertical columnar cone single pipe body and implements second-stage single-strand rotational flow rapid degassing operation; the residual liquid phase of the first-stage liquid flow is removed to form a second-stage gas flow and a second-stage liquid flow, third-stage reversing jet deep degassing operation is performed on a third-stage jet degasser by adopting a vertical columnar double-pipe body, and small-particle-size liquid drops carried by the first-stage gas flow and the second-stage gas flow are removed to form a third-stage gas flow and a third-stage liquid flow; and a first-stage axial flow degassing control system, a second-stage rotationalflow degassing control system and a third-stage jet flow degassing control system achieve remote automatic control over degassing operation of all stages and automatically regulate and control the flow and the flow pressure of gas-containing well liquid, all stages of gas flow and all stages of liquid flow.

Description

technical field [0001] The invention relates to a high-efficiency gas-liquid separation method in the field of oil and gas field development and production engineering, in particular to a compact, T-shaped pipe network, three-stage axial flow degassing tubular gas-liquid separation device and its real-time control system and process process. Background technique [0002] The natural gas produced by oil and gas wells needs to be powered and then transported over long distances. The liquid phase components and impurities in natural gas will cause mechanical failures when fueling turbine power devices, and cause various degrees of pollution and damage to downstream equipment. , and the existence of liquid phase components will reduce the dew point of natural gas, and the lowering of temperature will cause the natural gas to precipitate liquid during the transportation process. Therefore, gas-liquid separation operations need to be carried out before natural gas gathering and tr...

AI Technical Summary

Problems solved by technology

Among them, the gravity separator has the advantages of simple structure, low processing and manufacturing cost, and can meet different gas-liquid separation conditions. However, its disadvantages are also obvious, that is, it needs to provide a large enough space, and rely on gravity for separation to make the residence time longer. The separation efficiency is low, and the critical droplet size that can be separated from natural gas cannot exceed 100 μm, so it is impossible to separate small-sized droplets in gas-liquid two-phase flow, which is only applicable to ground natural gas separation projects

The filter separator can effectively solve the problems of the gravity separator, such as large separation critical droplet size, low separation efficiency, and long separation residence time. However, the filter element, a key component of the filter separator, is prone to clogging during the separation process. As a result, the pressure drop of the gas-liquid two-phase fluid increases rapidly before and after separation, and the filter element of the separator needs to be replaced regularly, and when the filter element of the separator is reused, the cleaning and sewage discharge process is more complicated

The combined cyclone coalescer organically combines a multi-tube centrifugal separator and a wire mesh coalescer to solve the serious problem of secondary carryover when the gas-liquid two-phase flow is large. However, the combined separator is prone to Liquid flooding, the treatment effect on pollutants is poor, and it is easy to cause blockage, and the direction of liquid discharge will directly affect the separation efficiency, and the pressure drop of gas-liquid two-phase flow is large

Finally, it should be pointed out that the domestic research on compact and efficient gas-liquid separation technology is still in the experimental stage.

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