说明书25mw循环流化床锅炉技术的设计_毕业设计.doc

摘要 循环流化床锅炉技术是近十几年来迅速发展起来的一项高效低污染清洁燃烧技术。国际上这项技术在电站锅炉、工业锅炉和废弃物处理利用等领域已得到广泛的商业应用，并向几十万千瓦级规漠的大型循环流化床锅炉发展;国内在这方面的研究、开发和应用也是方兴未艾，已有上百台循环流化床锅炉投入运行或正在制造之中。可以预见，未来的几年将是循环流化床飞速发展的一个重要时期。 本次设计根据给定的毕业设计任务书，参考相关资料，在分析锅炉的基本构造、工作过程及基本特性的基础上，对25MW循环流化床锅炉进行设计。本设计包括炉膛设计计算、稀密相区的设计计算和受热面的校核计算。在热力计算中，利用相似原理，采用逐次逼近法，进行迭代计算，确定炉体及相关部件的尺寸。 本次设计的锅炉效率为84.1%，炉膛截面积为52.63m2。从计算结果知，该锅炉设计合理，效率较高，可供工程实际设计参考，若能工程实施，将能带来较好的社会效益与经济效益。 关键词：25MW循环流化床锅炉；热力计算；结构设计 Abstract Circulating fluidized bed boiler technology is nearly a dozen years to speed up development of a high efficiency, low pollution and clean burning technology. In the international the circulating fluidized bed boiler technology has a wide range of commercial applications in power plant boilers, industrial boilers, waste management and other fields and has a great development to the hundreds of thousands of kilowatts of large scale circulating fluidized bed boiler; Domestic research, development and applications is in the ascendant. There are hundreds of circulating fluidized bed boilers have been put into operation or manufacturing. It can be predicted that the next few years will be an important period for rapid development of circulating fluidized bed. The design according to the given graduation design task book, refer to the relevant information, based on analysis of the basic structure of the boiler, and the basic characteristics of the work process, the circulating fluidized bed boiler for 25MW design. The design includes furnace design calculations, checking design calculations and calculation of heating surface thin dense phase region. In the thermal calculation, using a similar principle, using successive approximation method, iterative calculations to determine the size of the furnace and related components. The design of boiler efficiency is 84.1%. Furnace cross-sectional area is 52.63㎡. Known from its results, the boiler design is reasonable and high efficiency. The design can be a reference for engineering design. If t