Patent ID: 7771194
Filing Date: 2010-08-10
Classification: C23C

Abstract:
1. A gas preheater comprising: an entrance plate having a first side, a second side, at least one opening connecting said first side and said second side, and a plurality of walls on said second side having tops spaced from said second side, said walls defining at least one circuitous pathway on said second side beginning at said at least one opening; and a diffuser plate having a first side and a second side and a plurality of holes between said first side and said second side, said diffuser plate first side defining with said entrance plate second side and said plurality of walls at least one circuitous passage along said at least one circuitous pathway; said at least one circuitous passage having a first portion leading from said at least one opening and a second portion spaced from said at least one opening, wherein said holes in said diffuser plate overlie said circuitous passage second portion; and said diffuser plate contacts said tops of said plurality of walls to limit gas flow between said tops and said diffuser plate.