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通过研究一台150MWc切向燃烧煤粉炉的情况,探讨了为延长目前煤粉炉使用寿命,将其改造成循环流化床燃烧的可行性.提出的改造方案要求在原装置上改动最小.介绍的热力计算表明:改造后的锅炉在各不同部分的吸热量能同原燃煤粉炉相一致;提供了两种负荷工况的数据,确定了低负荷运行时的有关问题,通过对洗煤矸的热力计算,说明了改造后的循环流化床对燃料的适应性,可以断定:采用循环流化床燃烧,从热力角度来说是可行的.
By studying the situation of a 150MWc tangentially fired pulverized coal fired boiler, the feasibility of extending the service life of pulverized coal fired boilers to circulating fluidized bed combustion is discussed. The proposed reforming plan requires the least change in the original equipment. The results of thermodynamic calculation show that the heat absorption capacity of the modified boiler in different parts can be consistent with that of the coal-fired boiler. The data of two load conditions are provided and the problems related to the low load operation are confirmed. The thermal calculation of the refuse shows the adaptability of the modified circulating fluidized bed to the fuel, and it can be concluded that the use of a circulating fluidized bed combustion is feasible from a thermal viewpoint.