Based on technical feasibility, operational safety, equipment usability and system reliability of the oxy-fuel combustion technology, several design criteria were discussed and set up for control programs of the air/gas circulation and combustion subsystem in an oxy-fuel boiler. Results show that the main difference between oxy-fuel and traditional air combustion system lies in the control of boiler side air/gas circulation subsystem and burning subsystem, including following major processes: mode switching, oxygen supply and air distribution, combustion control, air/gas circulation as well as gas discharge and compression, etc. The control principles and strategies proposed can satisfy the control requirements of every process in relevant systems.
Key words
power plant boiler /
oxy-fuel combustion control /
oxygen supply and air distribution /
air/gas circulation /
mode switching /
CO2 capture
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References
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Footnotes
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