The Operation Characteristic And Optimization Of Mixed-coal Combustion Of Indonesian Coal In 300 MW Coal-fired Unit

With the rapid development of China's power industry, the situation of the shortage of the Power coal supply can not be solved in the short time, which leades to mixed-coal combustion. In order to meet changes in the current coal market, broaden the sources of coal supply channels, and, further reduce costs, Guangzhou Zhujiang Power Plant has the use of Indonesian coal in succession. The parameters of Indonesian coal deviate from the design and checked coal of the boiler, and this coal has a feature of high heat, high volatile, low ash and good ignition characteristics, but at the same time it is spontaneously ignitable. Another characteristic is that the ash dissolve point is low, which may generate a serious effect to the coke forming.Because of the differences between Indonesian coal and original design one, and in order to get to the effects of parameters, especially for the combustion system and coal pulverizing system, while buring this coal, the power plant has done some experiment work for mixed-coal combustion of Indonesian coal. This topic to Indonesian coal as the key point, will analyze the combustion characteristics, ash melting characteristics, and determine the best solutions and mixed burn operating conditions after the experiments and optimization. Finally, it will extend to other coal, accumulate experience for mixed-coal combustion, amd, expand the scope of application of coal.