Thermal power generation is a high energy consumption and water consumption industry

and recovery of water and waste heat from the flue gas of thermal power plants can play a significant energy-saving and watersaving effect. On the basis of experiment of water and waste heat recovery from flue gas by single 20-nm pore-sized ceramic membrane

the effects of flue gas flow rate(4～18 L/min)

flue gas temperature(50～70 ℃)

relative humidity of flue gas(40～100%) and cooling water flow rate(0.5～2.0 L/min) on the recovery performance of flue gas were studied. The results show that

the water recovery rate increased with the flue gas flow rate

flue gas temperature and relative humidity of flue gas. The water recovery efficiency rose with the flue gas temperature and relative humidity

and decreased with the increasing gas flow rate. The variation of cooling water flow had no effect on water recovery rate and water recovery efficiency. The flue gas convective condensation Nusselt number increased with the flue gas flow

relative humidity of flue gas and cooling water flow. In the case of large flue gas flow

the flue gas convective condensation Nusselt number increased with the flue gas temperature

and when the flue gas flow was small

the flue gas convection condensation Nusselt number increased at first and then decreased with the increasing flue gas temperature. The results are of theoretical significance for practical application of the ceramic membrane in flue gas of thermal power plants.