Abstract: Based on summary of the coal supply situation of the Yunnan province, according to the demand of the boiler combustion adjustment, aiming at the main technical characteristics of the 300MW subcritical boiler of the Yunnan Huadian Kunming Power Generation Corporation Limited, the management and control of the asreceived coal were enhanced. The coalblended burning was expounded in detail from several respects, such as to satisfy the emission requirement, to ensure the stability of the boiler operation, to enhance the adaptability of the boiler to the coal grade and etc. The practical experiment of the coalblended burning adjustment was carried out, and excellent result was obtained.

Key words: 300MW unit, subcritical boiler, coal parameters, coal-blended burning, adjustment of air supply