Analysis of separation performance of pulsating feed on gas-liquid hydrocyclone separator

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Abstract In order to better improve the gas-solid-liquid separation ability of drilling fluid shaker, a solid-liquid separation drilling method is proposed, which combines pulsating vacuum formed by a vibrating screen with compressed air injection simultaneously. On this basis, a kind of hydrocyclone using pulsating feed boundary for gas-liquid separation was developed. To analyze the gas-liquid separation performance of hydrocyclone, it is necessary to explore the optimal gas-liquid separation efficiency and its influencing parameters under the condition of pulsating feed. In order to solve this problem, the finite element software Fluent is used to simulate the flow of the cyclone separator with different structural parameters under the states of stable or pulsating feed. The boundary of pulsating feed was set by User-Define-Functions (UDF), and analyzing the efficiency curve. The optimal parameters of the separator under the pulsating feed state are obtained. The results show that the flow field in the pulsating feed state can be better stabilized. The highest gas-liquid separation efficiency of the cyclone separator can be achieved by sinusoidal pulse with a frequency of 0.4 Hz, the efficiency can reach 85.5%. Due to the existence of the pulsating feed, the separation efficiency of the separator is lower than that of the stable feed. Compared with the stable feed state, under the condition of pulsating feed, the pulsating discontinuity will lead to the increase of turbulent kinetic energy, the decrease of radial pressure gradient and the decrease of the peak value of tangential velocity. The above conclusions can provide the theoretical guidance for the design and engineering application of gas-liquid cyclone separator with pulsating feed.

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	Articles by authors
	YANG Rong
	HOU Yongjun
	LU Guangrong

Keywords： gas-liquid cyclone separator pulsating feed flow simulation UDF parameter optimization

Received 2021-04-22;

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YANG Rong, HOU Yongjun, LU Guangrong.Analysis of separation performance of pulsating feed on gas-liquid hydrocyclone separator[J] Chemcial Industry and Engineering, 2022,V39(5): 109-118

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