Top burning type hot blast stove with thermal insulation layer in precombustion chamber

Abstract

A top combustion type hot air furnace with thermally isolating layer for preburning chamber features that said thermally isolating layer can prevent the transfer of heat from preburning chamber to the internal walls of annular gas cavity and annular air cavity to lower their temp and decrease their temp stress and thermal expansion, so elongating the service life of hot air furnace. A heat isolating layer is also arranged in the second liner between annular gas and air cavities. A movable heat isolating cover is arranged between preburning and burning chambers.

Description

technical field [0001] The invention relates to the field of blast furnace hot blast stoves in the metallurgical industry, in particular to a top-combustion hot blast stove with a heat insulating layer in a pre-combustion chamber. Background technique [0002] Blast furnace smelting requires hot air with a sufficiently high temperature, and a hot blast stove is a commonly used device for providing such hot air. However, the top-fired hot blast stove has the defect that the partition wall of the pre-combustion chamber is easily damaged by frequent temperature vibrations. Although the top-burning hot blast stoves currently used in industry have been greatly improved, their structure has made considerable progress compared with the early top-burning hot blast stoves. The more effective treatment method adopted is to divide the partition wall into two independent parts, thereby shortening the brick length and reducing thermal expansion. But the transfer of heat still exists, a...

AI Technical Summary

Problems solved by technology

But the heat transfer still exists, and the temperature gradient also exists, so the service life of the hot blast stove is still not long enough

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