Novel thermal insulation structure on radiant tube heater

Abstract

The invention relates to a novel thermal insulation structure on a radiant tube heater, which comprises ceramic fiber modules, a high-temperature resistant slag-ball-free fiber cover and an extensible metal frame. A plurality of ceramic fiber modules are installed on a radiant tube cover and covered with a layer of the high-temperature resistant slag-ball-free fiber cover, and the external high-temperature resistant slag-ball-free fiber cover and the internal ceramic fiber modules form a fiber composite module; the extensible metal frame is welded on the radiant tube cover and used for fixing the fiber composite module and the radiant tube cover together; and fiber sealing rings are arranged around the extensible metal frame and used for sealing. The fiber composite module consisting of the ceramic fiber modules and the high-temperature resistant slag-ball-free fiber cover has very strong thermal shock resistance, and no slag ball fiber exists on the surface of the fiber composite module, thereby avoiding slag falling phenomenon; the extensible metal frame has very strong high temperature deformation resistance, can stretch out and draw back in vertical and lateral directions at high temperature and can be used for fixing a thermal insulation layer; and the fiber sealing rings are distributed around the metal frame for sealing the thermal current gaps.

Description

technical field [0001] The invention relates to a novel thermal insulation structure on a radiant tube heating device. Background technique [0002] At present, the insulation structure of the common radiant tube heating device is filled with aluminum silicate fiber blanket, zirconium-containing fiber blanket or high-alumina fiber blanket inside, and the outside is completely wrapped with high-temperature resistant metal components. Due to the fact that there are too many solder joints between the metal components and the radiant tube cover of this structure, the heat is transferred to the radiant tube cover through the metal components when used under high temperature conditions, causing thermal expansion and deformation of the radiant tube cover, and the thermal insulation performance is poor, and the temperature of the furnace wall is high. If deformed to a certain extent, it will not be usable. [0003] Due to the above-mentioned shortcoming, this thermal insulation str...

AI Technical Summary

Problems solved by technology

Due to the fact that there are too many solder joints between the metal components and the radiant tube cover of this structure, the heat is transferred to the radiant tube cover through the metal components when used under high temperature conditions, causing thermal expansion and deformation of the radiant tube cover, and the thermal insulation performance is poor, and the temperature of the furnace wall is high. Deformed to a certain extent will not be able to use

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