To remove dust sticking to the outside of a filter cloth and solve a clogging issue.
A nozzle body 13 is mounted, in a freely rotatable manner, at the end part of an air hose 11 connected to a compressed air supply source through a rotary joint 12. The nozzle body 13 incorporates an air chamber 14 communicating with the rotary joint 12 in the center and also has air blow-off apertures 15 opened, almost in a tangential direction, on the external sidewall. In addition, each of the air blow-off apertures 15 is connected to the air chamber 14 through an air flow channel 16 and a branch flow channel 20. Compressed air 17 is jetted to the outside from each of the air blow-off apertures 15 by supplying the compressed air 17 to the air chamber 14 through the air hose 11. Since the nozzle body 13 is rotated by the reaction of the compressed air 17 to be jetted, the jet direction of the compressed air 17 extends across the entire periphery of the peripheral direction. Further, both rotary joint 12 and nozzle body 13 are inserted from the upper end opening of the filter cloth of a bag filter and are made to ascend/descend inside the filter cloth in such a state that the compressed air is supplied, and thereby the compressed air is blown off to the entire internal sidewall of the filter cloth in the peripheral and the longitudinal direction.
MIYAMOTO NOBUYUKI
KUSAKA HARUO
IKEGAMI SATOSHI
JITSUKAWA TAKESHI
ISHIKAWAJIMA KANKYO ENG KK
JEITEKKUSU KK