毕业设计---75t循环流化床锅炉设计

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1、哈尔滨理工大学学士学位论文 -I- 西昌地区 75t/h 循环流化床蒸汽锅炉设计 摘 要 循环流化床（ CFB）燃烧技术是上个世纪 70 年代在国际上发展起来，80 年代在锅炉上得到成功应用的一种清洁煤燃烧技术。由于 它 具有高效 ，低污染且煤种适应性强这三大特点，自从 70 年代末第一台 20t/h 循环流化床锅炉问世以来，循环流化床燃烧技术得到了许多国家的重视，并与此同时得到了迅速的发展 。 我国自上世纪八十年代 起开始发展循环流化床锅炉技术，并同时 采取引进和自我开发两条路线， 目前已经 完全掌握了中小型循环流化床锅炉设计制造技术 。 本次设计根据 给定的毕业设计任务书 ，参 考相关资料

2、，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， 对西昌地区 75t/h 循环流化床蒸汽 锅炉进行设计。锅炉主体采用最典型的 M 型布置方式， 在 炉膛出口 与尾部烟道之间 布置 高温绝热旋风分离器 。尾部竖井烟道依次 布置两级过热器，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、气包与集箱的强度校核计算、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。 本次设计的 锅炉 效率为 86.83%，炉膛截面积为 31.27m2，炉膛容积为781.85m3。从计算结果知，该锅炉设

3、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 词 循环流化床；锅炉设计；高温绝热旋风分离器 哈尔滨理工大学学士学位论文 -II- Design of 75t/h circulating fluidized bed steam boiler for Xichang Abstract The circulation fluid bed (CFB) burning technology is a kind of clean coal burning technolog

4、y which starts from 70s,and achieve the application on the boiler successfully at 80s in the last century. Because its highly effective, the low pollution and strong compatible for many coal plants. It is at the end of the 70s when the first 20t/hcirculation fluid bed boiler has been published,the c

5、irculation fluid bed burning technology obtained many nationals values, and obtained the rapid development at the same time. Our country opens the beginning of developping the circulation fluid bed boiler technology from on century 80s, and simultaneously adopts the introduction and the self-develop

6、ment two political lines, we are already completely had grasped the design and manufacture technology for middle and small scale circulation fluid bed boiler at present. According to the graduation design mission book that the tutor gave definitely, this design combines the operation experience of t

7、he project practice and consult the relevant design data, a 75t/hCFB steam boiler for Xichang is designed on the basis of consulting concerning references and analyzing basic structure ,working process and general features of the boiler. Typical M type boiler. The high temperature cyclone separator

8、is distributed between the outer gate of the furnace and vertical flue； primary, secondary superheater higher and lower level economizers cross-connectedly is distributed in the vertical flue. In addition, designing calculation of furnace, convective heating surface, intensity of drum and smoke-wind resistance are accomplished. It should be emphasized that similarity criterion and successive approximation method with iterative