Flame image monitoring and analysis in combustion management

Conference · Sat Dec 31 04:00:00 EST 1994

OSTI ID:43230

Nihtinen, J J ^[1]

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1. Imatran Voima Oy, Vantaa (Finland)

When NO{sub x} emissions are reduced with new low-NO{sub x} burners and in-furnace modifications in old pulverized fuel boilers, many changes in the firing conditions may cause flame instability, increased slagging, increased minimum load and other difficulties in controlling the burning process. To find and solve these problems quicker, a new type of burner management system for pulverized fuel boilers was developed by Imatran Voima Oy. The system for pulverized fuel boilers was developed by Imatran Voima Oy. The DIMAC combustion management system monitors and analyzes individually each burner or burner level. There is special software both for wall and comer fired boilers. The DIMAC system can improve boiler efficiency by between 0.2--0.5 per cent unit as a result of more efficient control of the burning process. At the same time, the NO{sub x} formation can be reduced by 10--20%. As a result of the enhanced boiler efficiency and the savings in NO{sub x} emission taxes, DIMAC offers a pay-back time of as short as 0.5 years. DIMAC enables the operators to minimize NO{sub x} emissions and optimize the burning efficiency with varying coal qualities and boiler loads at the same time so that slagging, unburnt carbon in flyash and flame stability stay in acceptable limits. DIMAC also guarantees that burners operate in good safety conditions at each burner level. The DIMAC system is installed in 7 power plants. This burner-specific flame monitoring and analysis system is introduced.

• OSTI ID: 43230
• Report Number(s): CONF-940930--
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
20 FOSSIL-FUELED POWER PLANTS
AIR POLLUTION ABATEMENT
BOILERS
BURNERS
CAMERAS
COAL
COMBUSTION
COMBUSTION CONTROL
DESIGN
FOSSIL-FUEL POWER PLANTS
MONITORING
NITROGEN OXIDES
ON-LINE MEASUREMENT SYSTEMS
PERFORMANCE
PULVERIZED FUELS