Experimental study on entrainment performance of trapezoidal fixed valve tray
Experimental research was conducted on the entrainment performance of trapezoidal fixed valve trays in a 6 m tall cooling tower with a diameter of 1 200 mm and four internal trays,using air-water as the medium.The influences of three liquid flow rates,three outlet weir heights and three open area ratios on the entrainment performance of the trays were investigated and compared with sieve trays under equivalent conditions.The results show that the entrainment rate of trapezoidal fixed valve trays is mainly influenced by the increase in the thickness of the clear liquid layer.The increase of thickness leads to the increase of liquid layer resistance and the decrease of gas-liquid separation space,which mutually constrain and affect the entrainment amount.Comparing with the sieve trays,the trapezoidal fixed valve trays exhibit a significant advantage in suppressing entrainment phenomena,while the flooding point gas velocity is increased by approximately 15％.This indicates that the trapezoidal fixed valve trays have upper limit of gas phase load.A correlation equation for entrainment of trapezoidal fixed valve trays is derived based on experimental data,providing quantification of performance parameters of entrainment and serving as a reference for the separation of high-viscosity systems with large flow rates.The findings have industrial value for further research.
fixed valve trayssieve traysentrainmentflooding point gas velocitycorrelation equation
万方数据
维普
