Cutting diameter for solid particles and flow field in cyclones with different cylinder-cone height ratio

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Abstract Geometric configuration of a cyclone separator has an important influence on its pressure drop and particle separation performance. In separation of dust-laden tail gas, accurate understanding of the impact of configuration parameters and operating conditions of a cyclone separator on separation efficiency for solid particles is the premise for optimized structure and operation. RSM-DPM model was used to simulate and investigate the variation of particle cutting diameter, pressure and tangential velocity profile in the cyclone separator under different cylinder-cone ratios while maintaining a constant total height. It has been established that pressure drop between the inlet and outlet tends to decline with the increase of cylinder-cone ratio. Profiles for tangential velocity exhibit slight deviation from symmetric centerline of cyclones with changes of the cylinder-cone ratio. The effect of cylinder-cone ratio on cutting diameter for solid particles exhibits different mode under different range of inlet gas velocity. When inlet gas velocity is less than 12 m·s^-1, a smaller cylinder-cone ratio is more conducive to separation. When inlet gas velocity is greater than 12 m·s^-1, for a configuration with a small cylinder-cone ratio (less than 2.50), an appropriate increase in the cylinder-cone ratio is more favorable to separation, and when the cylinder-cone ratio is greater than 3, the cutting diameter barely changes with the cylinder-cone ratio. Aiming at different inlet flow rates, proper choice of the cylinder-cone ratio will help to obtain higher separation efficiency. For high and a low inlet gas flowrate, cylinder-cone ratio of 2.50 and 0.85 are suitable configuration options respectively.

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	LI Shengnan
	WU Bin
	CHEN Kui
	JI Lijun
	WU Yanyang

Keywords： cyclone separator cylinder-cone ratio pressure drop cutting diameter

Received 2023-03-09;

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LI Shengnan, WU Bin, CHEN Kui, JI Lijun, WU Yanyang.Cutting diameter for solid particles and flow field in cyclones with different cylinder-cone height ratio[J] Chemcial Industry and Engineering, 2025,V42(2): 135-144

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