PURPOSE: To prevent the damage of the porous ceramic pipe of a dust extractor even when the ceramic pipe is made long.
CONSTITUTION: In a dust extractor wherein dust-containing gas is supplied into porous ceramic pipes to take out purified gas from the outsides of the ceramic pipes, a plurality of almost vertically arranged porous ceramic pipes are added to form one ceramic pipe and an annular member 7 is placed on the upper end part of one ceramic pipe through a packing 6 so as to provide the degree of freedom and supported by an up-and-down slidable upper tube plate 5 in a state sealing the flow of dust and the lower end part thereof is placed and supported on the attaching seat formed to a lower tube plate through a packing in a dust sealing state so as to provide the degree of freedom. Upper and lower ceramics pipes are also connected to the intermediate connection part of the ceramics pipes so as to provide the degree of freedom.
KITAGAWA YUICHIRO
NAGASHIMA SEIJI
UEDA TETSUYA
URAKATA HISATAKA
