Automated control of fuel burning in multi-port boiler of thermal power station

Automated burning mode control is of great practical importance for multi-port PWHOF (peak water-heating oil-fired) boilers widely used at the thermal power plants. Due to its design features, the PWHOF boiler greatly complicates implementation of the automated burning mode control system (ABMC-system). Distinctive features are possibility of burning mode control with the number and combinations of simultaneously operated burners and absence of air and gas amount control. Possibilities of automated control of the burning quality have been estimated. The ABMC-system is practically to be constructed according to the process flow diagram with correction due to the oxygen content in exhaust gases. The double-circuit, one-channel ABMC-system developed with due regard to conditions of multi-port boilers is proposed. The paper provides experimental dependencies of gas flow and performance factor of multi-port boiler at the pressure deviation. Gas savings were estimated. We recommend switching from control according to the process flow diagram to automated control with the electric drive of the forced-draught fans.