| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an exhaust gas treatment method for recovering a reaction product as a valuable recovered matter as a fluorine raw material. <P>SOLUTION: The exhaust gas treatment method uses an exhaust gas treatment apparatus provided with an absorbent transfer type reactor (5) and an absorbent fixed type detoxifier (10). The reactor (5) causes decomposition product gas formed by the decomposition of PFC gas to act on the absorbent to allow them to react with each other. The absorbent after the reaction is separated into a surface layer part rich in a reacted portion and a core part rich in the unreacted portion. The core part after the separation is returned to the reactor (5). The surface layer part after the separation is classified into fine particles and medium particles by a classification means (7), the fine particles after the classification is recovered, and calcium-based powder is mixed with the medium particles to form a fluorine absorbent. The fluorine absorbent is supplied to the detoxifier (10). The decomposition product gas which is formed by the decomposition of PFC gas and is to be introduced into the detoxifier (10) is diluted, water is added in a controlled quantity to the diluted decomposition product gas, and the decomposition product gas added with water is reacted with the fluorine absorbent in the detoxifier (10). <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
