| 摘要 |
PROBLEM TO BE SOLVED: To improve a suspension tube type boiler of the prior art having the problems that a boiler rear part becomes slender, a building becomes large in the case of an indoor installation, and the site is elongated in the case of an outdoor installation.SOLUTION: The present invention solves the problem that a suspension tube type boiler becomes slender, by reversing and folding the horizontal gas flow of a boiler, and by making the width or height of a gas passage, which passes a suspension pipe group for each reversed and folded passage, to or smaller than the width or height size of the gas passage, so that the suspension tube type boiler of the prior art becomes slender.SELECTED DRAWING: Figure 6 |
