High temperature furnace
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United States of America Patent
Stats
-
May 4, 1993
Issued Date -
N/A
app pub date -
Dec 10, 1991
filing date -
May 7, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A high temperature, low NO.sub.x industrial furnace coal-fired burners placed in an arcuate heat track conduit which heats an arcuately configured wall member extending through an opening in the heat track conduit. The heated portion of the wall member rotates out of the heat track conduit to indirectly heat a bundle or bank of heat exchange tubes while an unheated wall portion moves into the opening vacated by the heated wall portion. The regenerative heated wall member thus permits the heat exchange tube bundle to be heated to high temperature without exposure to the burner products of combustion. The coal-fired burners are operated substoichiometrically to produce combustibles and a free-standing, jet entrainment arrangement is utilized to achieve staged combustion to avoid NO.sub.x formation.
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