| 摘要 |
A gas treatment device which treats sulfur oxides contained in exhaust gas by the combination of these oxides with alkali substances such as ammonia capable of cooling the exhaust gas to a temperature suitable for the combination through a heat exchanger and properly avoiding sulfur oxides contained in the gas from being adhered to heat exchanging surfaces resulting in corrosion, wherein the temperature of at least a part of the heat exchanging surfaces of the heat exchanger is reduced to a moisture saturated temperature or below of the gas, whereby the moisture contained in the gas condenses partly on a part of the heat exchanging surfaces so as to produce condensed water on the surfaces, thus preventing sulphur oxides or soot and dust from adhering to these surfaces, and also a refrigerant cooling the heat exchanging surfaces can produce the generation of condensed water through the entire surfaces of the heat exchanging surfaces by alternately switching refrigerant supply in the forward and reverse directions, and the refrigerant delivered can efficiently utilize waste heat by increasing the temperature to a high temperature of moisture saturated temperature or higher. |
