大容量锅炉变工况运行研究毕业论文

大容量锅炉变工况运行讨论摘 要大容量锅炉变工况运行讨论是一个重要的课题，热力计算是变工况讨论的基础。对于大容量锅炉机组，若采纳我国以前的传统计算方法，会出现计算数据和实际运行数据有较大误差的情况。本文以辐射换热理论为基础，建立了新的大容量锅炉传热模型，并采纳了新的热力计算标准对本课题选取的机组进行计算。新的分区段传热模型，将燃烧区域按实际运行时燃烧器的投运方式细分，并计算出燃烧器区域的温度分布和沿炉膛高度方向上的温度分布。辐射式过热器和屏式过热器的计算新方法更符合实际运行规律。本课题以现有的锅炉和传热学理论为基础，以实际运行数据为依据，对计算结果进行比较、分析，为大容量锅炉变工况运行提供了参考。关键词：锅炉、变工况运行、传热模型ABSTRACTVariant operation research of the high-capacity boiler is an important subject, and the heat calculation is the foundation of variant wok condition research. If we use old calculation ways to analyze the high-capacity boiler,there will be remarkable inaccuracy between calculation results and real operational data. This paper based the radiant theory establishes a new model of the high-capacity boiler heat transfer . And the new criterion of heat calculation is used to the selected unit. The new fragment model subdivides the combustor zone across the operation. So the temperature along the furnace are obtained. Radiant and platen superheater’s new method are more agree with the practice law.The paper is based on boiler knowledge and heat transfer theory and depends on practical operation data.The analysis on calculation results can provide reference for operation of the high-capacity boiler. KEY WORDS: boiler, variant operation, heat transfer model 目 录摘 要 IABSTRACTII第一章 绪 论 11.1 课题背景 11.2 国外讨论现状 21.2.1 国讨论现状 21.2.2 国外讨论现状 2第二章 煤的特性与其对锅炉工作的影响 42.1 概述 42.2 煤的常规特性 42.2.1 煤的组成特性与工业分析 42.2.2 煤的成分计算标准...