Furnace numerical model development for checking the possibility of boiler retrofitting from liquid to dry ash removal

Two schemes of lean Kuznetsky coal combustion with solid slag removal are proposed and investigated in the work: for the scheme with direct pulverized coal injection and for the scheme with pulverized coal bunker. Both schemes are based on the use of direct-flow burners and nozzles with a counter-di...

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Bibliographic Details
Main Authors: Prokhorov, V. B., Chernov, S. L., Kirichkov, V. S., Kaverin, A. A.
Format: Conference Proceeding
Language:English
Subjects:
Ash removal
Ashes
Boiler furnaces
Bunkers
CAD
Coal
Coal injection
Computer aided design
Computer simulation
Flue gas
Fuel combustion
Nitrogen oxides
Nozzles
Numerical models
Pulverized coal
Retrofitting
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Summary:Two schemes of lean Kuznetsky coal combustion with solid slag removal are proposed and investigated in the work: for the scheme with direct pulverized coal injection and for the scheme with pulverized coal bunker. Both schemes are based on the use of direct-flow burners and nozzles with a counter-displaced arrangement, the orientation of burners with a downward angle, and the use of staged fuel combustion. The possibility of a stable and efficient operation of the proposed schemes was tested in the ANSYS Fluent software package. The simulation results showed steady fuel combustion, carbon-in-ash losses of not more than 2% and a concentration of nitrogen oxides in flue gases of not more than 350 mg/m3.
ISSN:0094-243X
1551-7616
DOI:10.1063/5.0000506