AIR DIFFUSING DEVICE AND AIR DIFFUSING METHOD

To provide an air diffusing device excellent in air diffusing processing performance and cleaning operation performance.SOLUTION: An air diffusing device 10 of this invention includes: an air feeding header pipe 20 connected to a blower 21 which is an air feeding source; an air diffusing pipe 30 which includes a first curved pipe 31 and a second curved pipe 32 provided with plural air jetting holes 30a, in which the first curved pipe 31 and the second curved pipe 32 are connected with each other in series at respective one end parts 31a and 32a and which forms an air diffusing plane A along stored liquid face of treatment water; a first connecting pipe 41 that connects the air feeding header pipe 20 and the other end part 31b of the first curved pipe 31 via a first on-off valve 43; and a second connecting pipe 42 that connects the air feeding header pipe 20 and the other end part 32b of the second curved pipe 32 via a second on-off valve 44.SELECTED DRAWING: Figure 2 【課題】散気処理性能及び洗浄作業性に優れた散気装置を提供する。【解決手段】散気装置１０は、空気供給源であるブロワ２１に接続される送気ヘッダー管２０と、複数の空気噴出孔３０ａが設けられた第１曲管部３１及び第２曲管部３２を有し第１曲管部３１と第２曲管部３２がそれぞれの一端部３１ａ，３２ａにおいて互いに直列接続されており且つ被処理水の貯留液面に沿った散気平面Ａを形成する散気管３０と、送気ヘッダー管２０と第１曲管部３１の他端部３１ｂとを第１開閉バルブ４３を介して接続する第１接続管４１と、送気ヘッダー管２０と第２曲管部３２の他端部３２ｂとを第２開閉バルブ４４を介して接続する第２接続管４２と、を備える。【選択図】図２