PURPOSE: To recover heat of evaporator, etc. with reducedrunning cost by recovering heat at high temp. from vapor at low temp. utilizing high boiling point elevating effect of a liquid absorbent.
CONSTITUTION: Vapor V1 generated from a multiple effect evaporator 1 is guided to an absorber 41. A liquid absorbent is fed to the absorber 41 through a circulating duct C by driving a circulating pump 44, and the vapor contacts directly with liquid in the absorber 41. The absorbent comprises H2SO4 or NaOH, the temp. of which is elevated by absorbing the vapor V1. The liquid absorbent preheats feed liquid A by exchanging heat in a heat ex-changer H provided to the circulating duct C, and the temp. of the circulating liquid absorbent itself is held simultaneously at below the boiling point under the operation pressure, and absorbs continously the vapor V1 discharged from the evaporator 1 to recover the heat. The heat recovering device is used for recovering heat possessed by the vapor discharged in accompany with evaporation, distillation, etc.
YOSHIKAWA TAKASHI
HANABUSA TAKAHITO
| JPS5697501A | 1981-08-06 | |||
| JPS61287402A | 1986-12-17 |
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