Numerical Simulation and Experimental Study of Flows Outside the Nozzles of a Spray-type Desulfuration Tower

Established was a numerical simulation model for nozzles of a spray-type desulfuration tower and studied was the relationship among the following items,which can influence the gas-liquid mass transfer inside a spray type desulfuration tower:spray liquid flow rate,average rupture length of the liquid film,initial jet flow angle of the nozzle and average liquid drop diameter.A special test platform and single-turn spiral nozzle were designed and the liquid film and liquiddrop movement were tested and analyzed by using a quick-speed CCD(Charge Coupled Device) with a digital camera being used to take pictures.Both the model calculations and experimental results show that the average liquid film rupture-length and the average liquid drop diameter will decrease with an increase of spray liquid flow rate.When the clearance height at the nozzle outlet is 4.25 mm,the spray angle of the nozzle will decrease with an increase of the liquid flow rate and when the clearance height at the nozzle outlet is greater than 4.25 mm,the spray angle under a same nozzle clearance height will increase with an increase of the liquid flow rate.