Process and apparatus for operating a firebox with solid gasifiable fuel having poor kindling properties and low volatile gas contents
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United States of America Patent
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-
Feb 17, 1981
Grant Date -
N/A
app pub date -
Aug 9, 1979
filing date -
Aug 25, 1978
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
In order to burn a fuel of low ignition properties and low contents of volatile gases in steam generators: the combustion air is introduced in three batches at three successive places into the firebox. Preferably, the primary air is introduced at a temperature of at least about 500.degree., preferably between 500.degree. and 600.degree. C. so as to effect a pregasification of the fuel. The secondary air is then introduced at a temperature of about 350.degree. to 400.degree. C. to start the combustion of the pregasified fuel and the tertiary air is finally introduced at a temperature of only about 250.degree. to 300.degree. C. in order to complete the combustion. This temperature differentiation of heat ranges then will permit to withdraw theash as a dry discharge.
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