汽轮机汽封节能改造项目的经济性评价

发布时间：2018-05-07 23:12

本文选题：火电机组 + 运行方式　；参考：《大连理工大学》2015年硕士论文

【摘要】：我国是最大的发展中国家,合理利用能源、提高能源利用效率对我国经济发展具有特殊的意义。随着环保生产的提倡以及全球能源的日趋紧张,使得发电企业电煤价格日益攀升,电厂的经营环境面临极大的挑战,节能降耗的任务愈来愈严峻。汽轮机作为火力发电厂三大设备之一,其效率与发电机组的煤耗、热耗等经济指标关系密切,是火力发电厂技术经济指标的标杆之一。在众多影响汽轮机效率的因素中,汽封漏汽是主要因素之一。因此,为改善汽轮机汽封漏气状况,可对汽轮机汽封进行合理改造,从而提高汽轮机效率,可以进一步提升火力发电企业的经济效益。本文中主要论述了某火电厂在节能降耗的一系列改造项目中通过对不同类型汽封优缺点的研究找出合适的方案对该火电厂汽轮机组的汽封进行改造,从而达到降低整个机组热耗率,节约煤耗的目的,并通过全面优化试验的结果综合分析评估其经济效果,并运用层次分析法分析该项目的节能减排指标。最终确定改造方案的可实施性以及改造所带来的经济效益。
[Abstract]:China is the largest developing country. It is of special significance to make rational use of energy and improve the efficiency of energy utilization. With the promotion of environmental protection production and the increasing tension of global energy, the price of coal in power generation enterprises is rising day by day, the operating environment of power plants is facing great challenges, and the task of saving energy and reducing consumption is becoming more and more serious. As one of the three major equipments in thermal power plant, the efficiency of steam turbine is closely related to the economic indexes such as coal consumption and heat consumption of generating units, and is one of the benchmarks of technical and economic indexes of thermal power plants. Among many factors affecting steam turbine efficiency, steam seal leakage is one of the main factors. Therefore, in order to improve the leakage of steam seal of steam turbine, the steam seal of steam turbine can be reformed reasonably, thus the efficiency of steam turbine can be improved, and the economic benefit of thermal power enterprise can be further improved. In this paper, a series of retrofit projects for energy saving and consumption reduction in a thermal power plant are mainly discussed. By studying the advantages and disadvantages of different types of steam seals, a suitable scheme is found for retrofitting steam seals of steam turbine units in this power plant. In order to reduce the heat consumption rate of the whole unit and save the coal consumption, the economic effect is evaluated by comprehensive analysis of the results of the comprehensive optimization test, and the energy saving and emission reduction target of the project is analyzed by the analytic hierarchy process (AHP). Finally, the implementability of the reconstruction scheme and the economic benefits brought by the transformation are determined.
【学位授予单位】：大连理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TM621

【共引文献】