| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a chemical agent ejection/treatment method in a precoat type bag filter apparatus capable of effectively and exhaustively using a carbonaceous adsorbent and capable of conserving the use amount of a neutralizing agent. SOLUTION: In the precoat type bag filter apparatus having a plurality of unit duct collection mechanisms provided in an exhaust gas treatment equipment for treating exhaust gas generated from an incinerator, at a time of operation after shaking off, a necessary amount of a bonaceous adsorbent 81 is preliminarily bonded on the surface of filter cloth for a short time and the neutralizing agent 82 is initially ejected on the surface of the adsorbent layer in an amount slightly less than an expected necessary amount to form a precoat layer and at least one of the neutralizing agent 82, and a chemical agent 84 is additionally supplied intermittently correspondingly to a prescribed value of the difference pressure of the bag filter apparatus raised accompaned by the subsequent continuation of operation corresponding to the concentration of acidic harmful gas at the outlet of the bag filter apparatus and, at a point of time when the addition amount of the neutralizing agent reaches a difference pressure limit, the shaking-off of the unit dust collection mechanisms is successively performed and a part of shaken-off collected ash is refluxed to the re-combustion equipment provided above the incinerator to be pyrolyzed.</p> |
