All these boilers use the pulverized combustion (PC) technology. In 2003, the Unit 11 was reconstructed to use the circulated fluidized bed combustion (CFBC) technology, which is more efficient and environmental-friendly (lower SO2 and CO2 emissions) than PC technology.
The boilers under discussion all employ pulverized combustion (PC) technology. Nevertheless, in 2003, Unit 11 underwent a renovation to utilize the more efficient and eco-friendly circulated fluidized bed combustion (CFBC) technology, which results in lower SO2 and CO2 emissions compared to PC.