火电厂锅炉及辅助系统能效评价方法的研究

发布时间：2018-11-16 13:56

【摘要】：电站锅炉系统的能源利用效率水平对生产、能源、环境等具有重要影响。近年来随着低碳经济理念深入各行各业,对火电厂的节能减排也提出了更严格的要求。锅炉系统是火电机组的重要组成部分,其能效水平对整个电厂的节能减排、节约成本、提高效益有着极大的影响。而目前国内电厂仍沿用小指标评价对锅炉系统的能效水平做出判断,这难以系统化了解锅炉系统运行水平。本文充分认识到研究锅炉系统能效评价方法的重要性,从研究锅炉系统能效分析方法入手,结合环境燃料管理等多方面能效影响因素,建立锅炉系统能效评价指标体系,并利用模糊综合评价方法,建立电站锅炉系统能效评价模型。本文首先开展了电站锅炉系统能效分析的研究,并建立能效分析数学模型。根据(?)分析理论,分别建立锅炉热力系统的(?)分析模型和单个受热面的(?)分布模型计算模型。并以此确定能效评价指标,建立多层次的电站锅炉能效评价指标体系,为科学进行评价提供了良好的理论基础。本文在建立电站锅炉能效评价模型时,运用熵权法和专家评议法相结合的组合方法做为对评价指标的赋权方法,这种方法主客观因素相结合,具有较好的科学性。再采用模糊综合评价法确定电站锅炉系统能效总体评价模型。最后,本文以1025t/h亚临界锅炉机组为研究对象,运用本文所提方法对其做了能效分析与评价,评价结果有很好的客观性与准确性。本文的研究意义在于建立完整的锅炉系统能效综合评价模型,可以对电站锅炉系统的能效进行总体分析,并能得出实时能效水平,使得现场运行人员能够及时掌握和了解锅炉系统的能效状况,为对其进行优化调整提高效率提供依据,从而使低碳经济背景下火电企业具有较高的市场竞争力。
[Abstract]:The level of energy efficiency of utility boiler system has an important influence on production, energy, environment and so on. In recent years, with the concept of low-carbon economy going deep into various industries, the energy saving and emission reduction requirements of thermal power plants are more stringent. Boiler system is an important part of thermal power unit, and its energy efficiency level has great influence on energy saving, cost saving and efficiency improvement of the whole power plant. At present, domestic power plants still use small index evaluation to judge the energy efficiency level of boiler system, which is difficult to systematically understand the boiler system operation level. This paper fully recognizes the importance of studying the evaluation method of boiler system energy efficiency, starting with the study of boiler system energy efficiency analysis method, combining with the environmental fuel management and other factors affecting energy efficiency, establishes the boiler system energy efficiency evaluation index system. The fuzzy comprehensive evaluation method is used to establish the energy efficiency evaluation model of power plant boiler system. In this paper, the energy efficiency analysis of utility boiler system is studied, and the mathematical model of energy efficiency analysis is established. According to (?) Based on the analysis of the theory, the thermal system of boiler is established separately. Analysis model and single heating surface (?) Distribution model calculation model. The evaluation index of energy efficiency is determined, and a multi-level evaluation index system of boiler energy efficiency is established, which provides a good theoretical basis for scientific evaluation. In this paper, the combined method of entropy weight method and expert evaluation method is used as the weighting method to evaluate the energy efficiency of utility boilers. This method combines subjective and objective factors and has a better scientific nature. Then the fuzzy comprehensive evaluation method is used to determine the overall evaluation model of energy efficiency of utility boiler system. Finally, taking 1025t/h subcritical boiler unit as the research object, the energy efficiency analysis and evaluation are carried out by using the method proposed in this paper. The evaluation results have good objectivity and accuracy. The research significance of this paper lies in the establishment of a complete comprehensive evaluation model of boiler system energy efficiency, which can analyze the overall energy efficiency of utility boiler system and obtain the real-time energy efficiency level. So that the on-site operators can grasp and understand the energy efficiency of boiler system in time, and provide the basis for optimizing and adjusting the boiler system to improve efficiency, thus making the thermal power enterprises have higher market competitiveness under the background of low carbon economy.
【学位授予单位】：华北电力大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM621.2

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