Experimental and numerical simulation of water recovery and particulate matter simultaneous removal from coal-fired flue gas
Due to the scarcity of water resources and the increasing emphasis on environmental protection,it is of significance to carry out the investigation on the recovery of water from the coal-fired flue gas and the co-removal of particulate matter.In this study,an experimental system for flue gas moisture recovery was constructed,and then a numerical simulation model was developed.The influences of different factors on the water collection rate and heat transfer coefficient were investigated.It was found that the main factors affecting the water collection rate were the velocity of the flue gas and the temperature difference.When the flue gas velocity was 3m/s and the temperature difference was 13.2℃,the water collection rate was 51.77％.The main factors affecting the heat transfer coefficient were the velocity of the flue gas and the subcooling of the flue gas at the heat transfer tube wall.When the flue gas velocity was 9.6m/s and the cooling water temperature was 35 ℃,the heat transfer coefficient was 274.84W/(m 2·K).Moreover,an experimental system for particulate matter removal was constructed.It was found that when the subcooling temperature increased from 0℃ to 4℃ subcooling,the efficiency of particulate matter removal increased from 3.07％to 29.28％.When the flue gas velocity increased from 1.4m/s to 6.4m/s,the efficiency of particulate matter removal decreased from 29.28％to 7.40％.
万方数据
维普
