METHOD FOR SPRAYING COATING AGENT BY AIR FILTER, AND AIR FILTRATION DEVICE

PROBLEM TO BE SOLVED: To provide a method for spraying a coating agent by an air filter which is capable of uniformly adhering a coating agent that enhances filter effects and is easily strippable during backwash to a filter cloth, and to provide the air filtration device. SOLUTION: A powdery coating agent 42 is sprayed from the lower part of a filter cloth 11 or the upstream side of air treated by an air filter 2. The coating agent 42 is adhered to the surface of the filter cloth 11 by taking advantage of the stream of the treated air. Since the different of pressure in a portion of a small amount of adhesion of the coating agent 42 is smaller than that in a portion of a large amount thereof, the adhesion amount to the portion having a smaller adhesion amount naturally increases. Thus, the coating agent 42 can be adhered uniformly onto the whole of the filter cloth 11. COPYRIGHT: (C)2010,JPO&INPIT