Gas reaction apparatus and multi-wall pipe type burner therefor.

摘要

A gas reaction apparatus (K1) for manufacturing base material (15) of optical fiber and a multi-wall pipe type burner (10) for the gas reaction apparatus (K1). The gas reaction apparatus (K1) includes a mechanism (16,17) which heats or heat insulates at least one of gas passages of the burner (10) for gaseous raw material of optical fiber so as to set a' saturated vapor pressure of whole kinds of the gaseous raw material higher than a partial pressure of raw material of optical fiber in the gaseous raw material when the gaseous raw material is fed through the one of the gas passages.