百万超超临界机组制粉系统能效评价与诊断的研究

发布时间：2018-04-18 10:32

本文选题：制粉系统 + 指标体系　；参考：《华北电力大学(北京)》2017年硕士论文

【摘要】：我国以煤为主的一次能源结构现状,决定了火电机组在很长时间内还要占据半壁江山。而随着世界范围内化石能源资源日益紧缺,为响应国家节能减排政策,同时承担起降耗环保的社会责任,政府和电厂自身对其火电机组提高经济性和环保性的刚性需求变得愈加迫切。制粉系统作为电厂用电大户,其运行状态的水平直接影响到其自身乃至整个发电系统能效水平。因此针对火电机组中的制粉系统做能效评价和能效诊断很有意义。针对制粉系统,抽离出主要能耗设备磨煤机组和一次风机组,建立从设备运行参数——设备能效指标——制粉系统能效指标——火电机组能效指标的完备详细的指标体系。利用基于机理分析和数据挖掘的方法获取参数和能效指标的基准值,为能效分析和评价做好基础。建立从底层指标到火电机组顶层指标的能效评价方案。分析了系统层和设备层中影响能效指标的耗差因子,建立各层的耗差因子计算模型,验证基准值和耗差因子的正确性。通过机组运行参数和能效指标基准值的偏差给出制粉系统各层的能效评价结果。确定制粉系统能效诊断方案。根据能效评价结果定位能效薄弱环节,利用能效异常诊断树原理和基于能效诊断知识库的专家系统分析其可能发生的原因和调整处理的建议。本文针对某电厂1000MW超超临界#5机组的制粉系统进行能效评价和能效诊断研究内容的实例验证。其工程应用效果良好,对今后制粉系统能效方面的研究提供了一个方向。
[Abstract]:The present situation of primary energy structure based on coal in China determines that thermal power units will occupy half of the total amount of energy in a long period of time.With the increasing shortage of fossil energy resources around the world, in order to respond to the national policy on energy conservation and emission reduction, and at the same time assume the social responsibility of reducing consumption and environmental protection,The rigid demand of the government and power plants to improve the economy and environmental protection of their thermal power units has become more and more urgent.Pulverizing system as a large power plant power plant, the level of its operating state directly affects its own and even the whole power system energy efficiency level.Therefore, it is meaningful to evaluate and diagnose the energy efficiency of the pulverizing system in thermal power units.Aiming at the pulverizing system, a complete and detailed index system of energy efficiency index of thermal power unit is established from the main energy consumption equipment coal mill unit and primary air unit. The operating parameters of the equipment-the energy efficiency index of the equipment-the energy efficiency index of the pulverizing system are established.The method based on mechanism analysis and data mining is used to obtain the benchmark values of parameters and energy efficiency indexes, which provides a good basis for energy efficiency analysis and evaluation.The evaluation scheme of energy efficiency from the bottom index to the top index of thermal power unit is established.The consumption difference factors affecting energy efficiency index in system layer and equipment layer are analyzed, and the calculation model of consumption difference factor in each layer is established to verify the correctness of the reference value and the consumption difference factor.The evaluation results of energy efficiency of each layer of pulverizing system are given by deviation of operating parameters and benchmark values of energy efficiency index.To determine the diagnostic scheme of energy efficiency of pulverizing system.According to the results of energy efficiency evaluation, the weak links of energy efficiency are located, and the possible causes of energy efficiency anomaly diagnosis tree and the expert system based on energy efficiency diagnosis knowledge base are analyzed and the suggestions of adjusting treatment are given.In this paper, the energy efficiency evaluation and energy efficiency diagnosis of the pulverizing system of 1000MW super supercritical #5 unit in a power plant are verified by an example.Its engineering application effect is good, which provides a direction for future research on energy efficiency of pulverizing system.
【学位授予单位】：华北电力大学(北京)
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM621

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