影响燃气—蒸汽联合循环发电机组经济性分析

发布时间：2018-07-24 12:42

【摘要】：燃气——蒸汽联合循环对燃料的化学能实现了梯级利用,系统循环效率高,近年来随着我国能源政策的逐步科学化和理性化,燃气——蒸汽联合循环因其效率高、成本低、建设周期短、调峰性能好和能满足世界各国的环保要求而广泛地被采用和推崇。燃气——蒸汽联合循环的发展依赖于热力学基础理论和工程技术的发展,新型热力系统的提出受到环境保护和经济性两方面的制约。当今联合循环发展的目标是不断向高参数、高效率、高性能、大型化和对环境的低污染方向发展,同时积极把目光投向了对于新兴的清洁煤联合循环技术的开发应用。全文通过对燃气——蒸汽联合循环认识、研究,指出燃气轮机在循环中具有重要的地位,其性能对联合循环的经济性与可靠性产生较大影响;提高燃气初温、改善压气机特性、提高冷却技术水平显得尤为突出;其他主要设备的性能、燃料的种类以及排烟温度、大气环境条件等等对于联合循环效率的影响也是不可低估的;并提出优化各系统的措施及在设计、运行中如何更好地改善联合循环的性能等等。本文通过对燃气——蒸汽联合循环发展趋势及现状的了解,分析了我国此类设备的发展趋势及现状,燃气——蒸汽联合循环是一种有显著优点和较大发展潜力的动力装置。从提高联合循环效率途径和环境温度对燃气轮机及联合循环性能的影响进行分析,再从燃气——蒸汽联合循环发电效率进行分析与计算,得出相应的结论。随着世界性的电力体制改革,电力市场的建立,环境意识的增强,更加快了联合循环发电的发展步伐。在21世纪,燃气——蒸汽联合循环发电将起到主导地位。本文主要对包钢动供总厂燃气——蒸汽联合循环发电机组经济性进行分析,研究的目的就是在于初识联合循环这一新型动力工程的基础上,探讨、学习、分析影响燃气——蒸汽联合循环经济性的原因,从中分析出几点主要原因,并找到其解决办法和相关结论。重点从煤气成分对燃气轮机经济性影响和排烟温度限制及燃料限制对经济性的影响进行分析,最后得出相应的结论,并对存在的问题提出相应的措施。
[Abstract]:Gas-steam combined cycle has realized cascade utilization of the chemical energy of fuel, and the system cycle efficiency is high. In recent years, with the gradual scientific and rational energy policy in our country, the gas-steam combined cycle has high efficiency and low cost. The construction period is short, the peak-shaving performance is good and can meet the environmental protection requirements of the countries all over the world, so it is widely adopted and respected. The development of gas-steam combined cycle depends on the basic theory of thermodynamics and the development of engineering technology. Nowadays, the goal of combined cycle development is to develop continuously to high parameter, high efficiency, high performance, large scale and low pollution to the environment. At the same time, the development and application of new clean coal combined cycle technology has been put forward actively. Based on the understanding of gas-steam combined cycle, the paper points out that the gas turbine plays an important role in the cycle, and its performance has a great influence on the economy and reliability of the combined cycle, and improves the initial temperature of gas and the characteristics of the compressor. The performance of other main equipments, the types of fuel, the exhaust gas temperature, the atmospheric environmental conditions and so on, can not be underestimated for the combined cycle efficiency. The measures to optimize the system and how to improve the performance of the combined cycle in the design and operation are put forward. Based on the understanding of the development trend and present situation of gas-steam combined cycle, this paper analyzes the development trend and present situation of this kind of equipment in China. The gas-steam combined cycle is a kind of power plant with remarkable advantages and great development potential. Based on the analysis of the influence of the way of improving the combined cycle efficiency and the ambient temperature on the performance of the gas turbine and the combined cycle, and the analysis and calculation of the efficiency of the gas-steam combined cycle generation, the corresponding conclusions are drawn. With the worldwide reform of electric power system, the establishment of electricity market and the enhancement of environmental consciousness, the development of combined cycle power generation has been accelerated. In the 21 st century, gas-steam combined cycle power generation will play a leading role. This paper mainly analyzes the economy of gas-steam combined cycle generator set in Baotou Iron and Steel works. The purpose of the research is to discuss and learn from the new power engineering of combined cycle. This paper analyzes the reasons that affect the economy of gas-steam combined cycle, and analyzes several main reasons, and finds out the solutions and relevant conclusions. Based on the analysis of the influence of gas composition on the economy of gas turbine and the limitation of exhaust gas temperature and the influence of fuel limitation on economy, the corresponding conclusions are drawn, and the corresponding measures are put forward to solve the existing problems.
【学位授予单位】：内蒙古科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM611.31

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