Abstract: Abstract:In some thermal power generation enterprises, the practically fired coals are of various types, and the coal quality and characteristics are different, which causes unstable combustion in boiler and poor economic efficiency. Aiming at above problems, a mathematic model of raw coal blending was established. The goal function of the model is the lowest coal cost, and the constraint conditions of the model are the indexes of the calorific value, the sulfur content, the volatile component, the moisture and the ash content. Based on this model; a coal blending simulation system was developed. According to the requirements of boiler on the calorific value, the ash content, the moisture, the volatile component and the sulfur content, using the simulation system, a raw coal blending scheme can be obtained, which can meet the requirement of stable combustion of the boiler.

Key words: Keywords:thermal power plant, raw coal blending, mathematic model, software