Method for recovering heat.

摘要

A method of recovering the head of hot water or a hot aqueous solution whose temperature is higher than the ambient temperature but lower than 200 DEG C, wherein air or a non-condensing gas is brought into direct countercurrent contact with the hot water or hot aqueous solution to provide a heated gas mixture of water vapor and air or non-condensing gas, and the heat is recovered in the form of the sensible heat of the resulting heated gas mixture and the latent heat of the water vapor in said mixture is disclosed.