TREATMENT OF SOLVENT-CONTAINING EXHAUST GAS

PURPOSE:To reduce the cost of a combustion treatment apparatus, by performing the steam desorption of the solvent adsorbed by an adsorbing apparatus and condensing solvent-containing steam while quantitatively supplying the condensate to a combustion furnace as a fuel oil additive of said furnace. CONSTITUTION:Solvent-containing exhaust gas 11 is guided to an adsorbing tank 12 to perform the adsorptive collection of the solvent in said gas. After a definite time, desorbing steam 14 is sent to the adsorbing tank 12 to desorb the solvent which is, in turn, sent to a preheater 15 along with the steam mixed gas and condensed through the heat exchange with combustion air 18 while the condensate is stored in a receiving tank 16. The condensate is sprayed into preheated air by a pump 17 to form a gaseous mixture. Preheated air is further raised in its temp. through the heat exchange with combustion gas in a heat exchanger 19 and subsequently sent to a combustion furnace 21 and burnt. The combustion gas issued from the heat exchanger 19 is sent to a waste heat boiler 22 to generate steam 25 and exhausted from a chimney 23. The generated steam 25 is supplied as the desorbing steam 14 from a steam header 26.