PROBLEM TO BE SOLVED: To provide a dust-removal device of a downsized lateral type structure for treating various kinds of vapor phase fluid as an object to be treated, easily adapting recovery of an object to be removed to various kinds of conditions and suitable for a position where vertical height is restricted.;SOLUTION: A rotation dust-removal part A1 for making a rotation flow of a vapor phase fluid is constituted by an inner air-leading cylinder body 2 and an outer surrounding cylinder body 3 in which direction of a cylinder axis is directed to a horizontal direction. A dust separation part 31 for permitting running out of the object to be removed contained at the outermost side of the rotation flow to an outside of the rotation flow and escaping it is formed on a part of the surrounding cylinder body 3. A ventilation part 23 for short circuit for sucking a part of the vapor phase fluid during rotation at an upper position than an introduction port at a lower end of the air-leading cylinder body 2 by a suction action from the inside of the air-leading cylinder body 2 is formed. An external taking out cylinder 7 for guiding the object to be removed dropping off from the rotation flow of the dust separation part 31 to the outside of the casing 1 and dropping off by the own weight is provided.;COPYRIGHT: (C)2006,JPO&NCIPI
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