Tubular cyclone gas-liquid separation device

Abstract

The invention relates to a tubular cyclone gas-liquid separation device. The tubular cyclone gas-liquid separation device comprises a rectification pre-segmentation section and a cyclone separation section, the rectification pre-segmentation section comprises a buffer vertical pipe, the lower end is connected with the upper end of the buffer vertical pipe; a bend pipe, wherein the lower end is connected with the upper end of the buffer vertical pipe; a downdip pipe, one end of the downdip is connected with the upper end of the bent pipe; a liquid separation tank is arranged below the downdip pipe, and the top of the liquid separation tank is communicated with the middle of the downdip pipe through a first connecting pipe; a cyclone separation section, the lower part of the gas-liquid separation column is communicated with the lower part of the liquid separation tank through a second connecting pipe, the middle part of the gas-liquid separation column is communicated with the other endof the downdip pipe, and gas-phase and liquid-phase outlet pipes are respectively arranged at the top and the lower part; and a reducing nozzle is arranged in the downdip pipe close to the outlet endof the downdip pipe. The gas-liquid separator can effectively convert an incoming gas-liquid slug into layered flow, eliminates strong impact of the inlet slug on the separator, maintains the stability of a cyclone field and a gas-liquid interface in the separator, improves the flow pattern conversion efficiency and the adaptability to severe working conditions, and realizes stable and reliable operation of the gas-liquid separator.

Description

technical field [0001] The invention relates to a gas-liquid separation device, in particular to a tube-type cyclone gas-liquid separation device suitable for oil-gas separation places with strict requirements on the weight and volume of the separator, belonging to gas-liquid cyclone separators and multiphase flow technology field. Background technique [0002] As oil field development gradually moves from land to sea, the development of offshore oil and gas fields has become the focus of offshore oil development. Research and development of high-efficiency separation equipment is an inevitable way for offshore economic development, cost reduction and efficiency increase. At the same time, with the increase of water cut in the later stage of the oilfield, the upgrading and transformation of the original treatment system urgently needs new technologies for high-efficiency separation. Underwater gas-liquid separation technology is an innovative technology to control deepwater...

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Problems solved by technology

However, the requirements for compactness of the tubular cyclone gas-liquid separation device have also brought certain negative effects. Since the internal space of the separation device is very limited compared with conventional gravity separators, fluctuations in the gas-liquid flow rate will affect the columnar separation. The swirling field of the section and the characteristics of the gas-liquid interface have a great impact, especially when the inlet flow pattern is a slug flow, it will cause a strong impact on the separator, and the narrow internal space has no buffering effect, so that the separator's Separation performance and stability are difficult to meet expectations

Although the existing tube-type cyclone gas-liquid separation device with a down-dip tube has a certain rectification effect and can weaken the influence of the slug, the down-dip section is long and the installation is inconvenient, so it is not suitable for adjusting the weight and volume of the separator. Oil and gas separation sites with strict requirements

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