FIELD: power industry.
SUBSTANCE: in boiler operating method in bottom-ash removal mode, which involves combustion of solid fuel in high-temperature circulating fluidised bed, the bottom ash is removed from combustion zone to slag receiving zone, combustion products are removed and heat the primary air, slag contacting with the coil installed in slag receiving zone heats the ambient air moving in the coil and directed to combustion zone as secondary air.
EFFECT: improving reliability and economy by simplifying the slag removal at available ash hopper and utilisation of heat of slag during steam generation in case of combustion of solid fuel in high-temperature circulating fluidised bed and removal of slag in solid form.
1 dwg
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Authors
Dates
2011-03-27—Published
2009-12-17—Filed