Abstract
According to high level needs such as environmental conservation, simple operation and maintenance, and low cost, importance is increasing more rapidly in recent years in developing a combustion system technology for thermal power stations. One of the reasons is diversity of fuels, i.e., wide range of coal properties and low grade of oil etc.. Hitachi group is trying to raise the technology to correspond to them. This paper describes a compact ring-roller mill with 25% lower mill height and with 30% higher grinding capacity by high grinding energy and high efficient classifier for coal combustion, and the Hitachi low NOx burners with a concept of DeNOx in flame for coal, oil, and gas combustion.
