毕业设计(论文)燃贫煤120吨小时电站锅炉及主要部件设计.doc

学士学位论文 燃煤吨/小时电站锅炉及主要部件设计 电站锅炉是利用燃料燃烧释放的热能加热给水，以获取规定参数(温度、压力)和品质的蒸汽的设备。我国电力工业是规模巨大、发展迅速的先行工业，已居世界前列。 本次设计根据给定的毕业设计任务书，参考相关资料，结合工程实际情况，在分析锅炉的基本构造、工作过程及基本特性的基础上，对燃煤t/h电站锅炉进行设计。锅炉主体采用最典型的Π型布置方式，燃烧方式采用四角切圆燃烧。炉膛出口布置凝渣管，水平烟道布置两级过热器，垂直下行烟道交错布置两级省煤器和两级空气预热器。另外本设计进行了炉膛设计计算、锅炉各对流受热面的设计计算、气包与箱的强度校核计算、烟风阻力计算。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。并用Excel编制了煤粉锅炉设计计算表，输入对应参数后可自动计算并输出结果，适用于总体布置相似的所有煤粉锅炉。 锅炉的效率为%，炉膛截面积为m2，炉膛容积为m3。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。本毕业设计论文包括设计说明书一份、锅炉系统总图一张、锅炉水管系统图一张、锅筒图一张、。 关键锅炉；；Design of 120t/h power boiler system and main parts with bituminous coal Abstract The power plant boiler is a equipment that can use thermal energy released by the fuel burnt for heating up the water, and can gain the steam of stipulation parameter (temperature, pressure) and quality. In the modern age, the development of electric power industry which experiences the huge scale and rapid development, has occupied the world front row in our country. According to the graduation design task that the tutor gave definitely, this design combines the operation experience of the project practice and consult the relevant design data, a 120t/h power plant boiler burning bituminous coal is designed on the basis of consulting concerning references and analyzing basic structure ,working process and general features of the boiler. Typical Π type boiler and tangential firing burner are adopted. The screen tube is distributed at the outer gate of the furnace; primary and secondary superheater in the horizontal flue and higher and lower level economizers cross-connectedly in the vertical flue. In addition, designing calculation of furnace, convective heating surface, intensity of drum and smoke-wind resistance of boiler are accomplished. It should be emphasized that similarity criterion and successive approximation method with iterative computing are used in heating calculation. And the chart was constituted for designing pulverized coal boiler with Excel software. A