| 摘要 |
<p>1. A method for recovering heat from gases, particularly residual gases, having a sufficiently high saturation temperature to evaporate a solution to be concentrated, in which method heat is exchanged between the gases and the solution to be concentrated in several successive evaporation stages, whith the first evaporation stage (A) producing vapour by exchange of heat between the solution being concentrated and the residual gases, the method comprising, in each stage following the said first stage, production of vapour in an evaporator (3) in which the solution being concentrated is circulated (F2 ) and in which this solution is partially evaporated by condensation of the vapour coming from the preceding stage, characterized in that the gases flow from one stage to the next in a circuit (F1 ) independent of the vapour circuit (F3 ) and produce additional vapour in each stage by heat exchange with the solution to be concentrated in an evaporator (1) of the stage involved.</p> |
