JPS6419251A - Fluid heating device - Google Patents

Abstract

PURPOSE:To make it possible for a fluid heating device to withstand use over a long period of time without generating cracks due to thermal stress under high temperature by preparing plate-like radiating member having inorganic fiber moldings. CONSTITUTION:Plate-like radiating members 27 made of plate-like inorganic fiber molding having through holes 30 are horizontally suspended between first heat transfer pipes 23 and second heat transfer pipes 25. Each of through-holes 30 has a diameter of 2mm or more, for example, and a body on the rear side is visible through said holes 30 by naked eyes. As inorganic fibers constituting inorganic fiber moldings, those mainly having crystalline properties and having a high heat resisting temperature, are used, and as inorganic fiber moldings. Those capable of holding their own shapes without causing deformation at using temperatures are used. In the heating device, in which the first heat transfer pipes, radiating members and second heat transfer pipes are disposed in this sequence from the upstream amidst the flow of a high- temperature gas thereby to heat a fluid to be heated within the first and second heat transfer pipes, since such inorganic fiber moldings are used for these radiating members, no thermal stress cracks are generated by temporal and spatial abrupt temperature fluctuations.