WASTE GAS TREATMENT METHOD AND TREATMENT EQUIPMENT

PROBLEM TO BE SOLVED: To provide a waste gas treatment method and treatment equipment which are capable of efficiently utilizing slightly excessive desuperheating water to be cyclically used. SOLUTION: In the waste gas treatment method of introducing the waste gas containing hazardous components into a waste gas desuperheating column 1 of a water spray system and cooling the same, then introducing the waste gas into dust collector equipment 2 and removing the dust in the waste gas and in succession introducing the gas into a wet process spray tower 3 to remove the hazardous components in the waste gas, the wet process spray tower 3 consists of at least a liquid chemical spray section 3a which removes the acidic components in the waste gas by spraying the liquid chemical and a desuperheating section 3b which recovers and desuperheats the mist in the waste gas by cooling the waste gas past the spray section 3a and cyclically uses the desuperheating water. At least a portion of the desuperheating water produced in this desuperheating section 3a is used for the spray water of the waste gas desuperheating column 1.