【作者】 朱路平；

【导师】 刘彦丰；

【作者基本信息】 华北电力大学 ， 热能工程， 2011， 硕士

【摘要】 在普遍要求节能减排的国际大背景下,作为新型燃烧技术的富氧燃烧技术受到了各个研究机构广泛的重视。本文针对富氧燃烧技术存在的优点和缺点,对其进行了综合全面的经济可行性分析,为其以后的实际应用提供了理论依据。文中应用工程热力学和传热学的相关原理对富氧燃烧机组各个设备的运行和能耗情况进行了定量的计算评估,包括锅炉本体、空分制氧系统、CO₂捕集系统和烟气脱硫系统等。并应用热力学成本估算方法,对锅炉本体的基建投资情况进行了估算,最后还应用技术经济学中的等额年度化分期偿还成本的原理,在考虑燃煤费用、运行维护费用和净输出功率的情况下,对机组进行综合性的经济性分析,很直观的描述了富氧燃烧技术的优劣性。此外,本文对锅炉改造、各设备的相关结构和运行流程也做了详细的介绍,使评估的内容更加完善。通过对各设备的全面分析,可以得出,富氧燃烧锅炉和烟气脱硫系统的效率比常规机组略有提高,但空分制氧系统和CO₂捕集系统消耗的大量能量又使机组的整体效率降低了很多,同时这些设备的基建投资也需要额外的大量增加。当把所有这些因素都综合到供电成本里时,可发现富氧燃烧机组的供电成本比常规机组是要高的,但减少了大量的CO₂排放,由此引起的环境收益也是不可估量的。总的来说,富氧燃烧技术的应用是可行的,在与其他CO₂减排技术的对比中,经济性是相对比较明显的,存在的优势也是比较大的。更多还原

【Abstract】 On the background of the universal demand of energy saving and emission reduction, the oxy-fuel combustion technology, as a new burning technology, has received various research institutions’extensive attention. To the existing merit and shortcoming of oxy-fuel combustion technology, this article has carried on the comprehensive economic feasibility analysis, providing theory basis for its future application.In this paper, the related principle of engineering thermodynamics and the heat transfer theory is applied to estimated the operation and the energy consumption of the equipments in the the form of quantitative, including the boiler, air separation unit, CO₂ capture system and flue gas desulphurization systems. And it has estimated the boiler’s initial cost applying thermodynamics cost estimate method. Finally, this paper carry on a comprehensive economic analysis for the unit. In the analysis, it refers to the cost of the annual amortization in technical economics, and consideres the coal costs, operation and maintenance costs and the net electricity. It is very intuitive description of the advantages and disadvantages of oxy-fuel combustion technology. In addition, The boiler improvement, the various equipment’s related structure and operation process has also been introduced in detail ,in order to improve the content of the assessment.Through comprehensive analysis of all kinds of the equipments, we can conclude that the efficiency of the boiler and flue gas desulfurization appliance is slightly higher than conventional unit, but the huge energy consumption of air separation unit and CO₂ capture system reduced the overall efferency of unit, and the Infrastructure investment increase sharply meanwhile. When all these factors are integrated to the cost of electricity supply, you can find that the oxy-fuel combustion unit’s cost of electricity supply is higher than conventional unit’s, but it reduces a large amount of CO₂ emissions and the environmental gains is inestimable. Generally speaking, oxy-fuel combustion technology is feasible, it is more economic than the other CO₂ emission reduction technology. Compared with other technology, it has more advantages.更多还原