WASTE GAS TREATING DEVICE AND WASTE GAS PURIFYING METHOD

摘要

PROBLEM TO BE SOLVED: To previously remove dioxin precursors and to effectively prevent the generation of dioxins by applying a heat resistant filter consisting of an aqueous film-formable inorg. compd. soln. to a waste gas treating stage of an incinerator. SOLUTION: This device is provided with a second waste gas treating device 30 arranged succeeding by to a first waste gas treating device 3, and the first waste gas treating device 3 Is constituted so that aqueous filme-formable inorg. compd. soln. consisting of a silanol salt and siloxane consisting essentially of Si, having film-formable property and working as the heat resistant filter may be jetted from a jetting part 9 into the waste gas. The second waste gas treating device 30 is provided with a shower feed unit 31 for feeding the soln. into a waste gas flow passage in a from like shower and a liq. film forming device for forming the liq. film formed by the soln. so as to Intercept the waste gas flow passage and for allowing the waste gas to pass by breaking the liq. film and the waste gas is purified by allowing the aqueous film-formable inorg. compd. soln. to contact stepwise with the waste gas.