As it forms the boss section

摘要

PROBLEM TO BE SOLVED: To provide an air permeating agitation device which is used for a flue gas desulfurizing apparatus, or the like, is excellent in dispersion of gas to an agitating liquid and high in gas absorbing efficiency and in which the accumulation of air bubbles is not generated on an agitation blade.;SOLUTION: The boss part of the agitation blade 2 is formed into a cylindrical tube boss 4, which is fixed on a driving shaft 6 while interposing a supporting plate 5 to form a gap between the boss 4 and the shaft 6. A discharging port 7a of an air permeating tube 7 is formed to have such a structure that the shaft 6 can be inserted and is made open to the inside of the boss 4. An outflow port 4c of the boss 4 is made open to the downstream side of the blade 2 while keeping a sufficient distance.;COPYRIGHT: (C)2001,JPO