Honeycomb heat accumulator for shock resistance and high temperature oxidation resistance

Abstract

The invention belongs to the industrial furnace air / fuel gas preheating technique field, in particular to a honeycomb regenerative body with impact and high temperature oxidation resistance mainly comprising a refractory material honeycomb regenerative body on which a plurality of parallel honeycomb through holes are arranged, the external surface of the refractory material honeycomb regenerative body is wrapped with a metallic layer with the average thickness larger than or equal to 0.1mm, and the external surface of the metallic layer is provided with a molybdenum disilicide high temperature infiltration layer. The honeycomb regenerative body has the advantages that: the honeycomb regenerative body with low cost of manufacture and resistance to impact, thermal shock and high temperature oxidation is provided, and a most important foundation is laid for adopting the thermal explosion pulse soot-blowing technique by the honeycomb regenerative body.

Description

technical field [0001] The invention belongs to the technical field of air / fuel gas preheating of industrial furnaces, and in particular relates to a honeycomb regenerator that is impact-resistant and high-temperature oxidation-resistant. Background technique [0002] In order to improve thermal efficiency, save fuel, increase combustion temperature, and increase heating speed, various industrial heating furnaces are generally equipped with regenerators, and honeycomb regenerators are arranged in the regenerator chambers, and some use regenerator burners. , that is, the burner is provided with a honeycomb regenerator. [0003] There are two types of existing honeycomb heat storage bodies: [0004] One is made of traditional refractory materials, such as Chinese patents with application numbers 2006201588543, 022359850, and 033350353, which have the advantages of high temperature resistance and low cost, but the disadvantages are brittle quality, poor impact resistance and r...

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Problems solved by technology

[0006] The author's previous patent application No. 2008101065239 proposed a long-life impact-resistant honeycomb heat storage body and its manufacturing method, mainly using a thermal spraying process to spray a layer of metal coating on the outer surface of the refractory honeycomb heat storage body. Its advantage is that it maintains the cheapness of the refractory honeycomb heat storage body, and greatly improves its impact resistance and rapid cooling and rapid heating performance, thereby greatly improving its service life. The disadvantage lies in the high temperature oxidation resistance of the metal coating layer. poor

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