| 摘要 |
<P>PROBLEM TO BE SOLVED: To perform treatment of deposits in an exhaust gas duct while further simplifying a facility structure. <P>SOLUTION: By supplying source gas from a source gas supply source 11 to a burner 9 for glass synthesis installed in a booth 3, an optical fiber base material 1 is manufactured in a chamber 5. When the source gas is supplied from the source gas supply source 11 to the burner 9 for glass synthesis, the source gas is disposed of in a vent box 17 until supply pressure is stabilized. Mainly, the disposal gas is discharged through a flexible duct 15 and a scrubber duct 13 into an exhaust gas cleaning device. In the scrubber duct 13 at connections between the flexible duct 15 and the scrubber duct 13, a duct 25 for replacement is housed and fixed. The duct 25 for replacement has a flange 25b which is interposed and fixed mutually between respective flanges 27b, 29 of the flexible duct 15 and the scrubber duct 13, and is replaced as deposits are deposited in the inner surface and replacement time comes. <P>COPYRIGHT: (C)2012,JPO&INPIT |
