【摘要】：電站鍋爐系統(tǒng)的能源利用效率水平對生產(chǎn)、能源、環(huán)境等具有重要影響。近年來隨著低碳經(jīng)濟理念深入各行各業(yè),對火電廠的節(jié)能減排也提出了更嚴格的要求。鍋爐系統(tǒng)是火電機組的重要組成部分,其能效水平對整個電廠的節(jié)能減排、節(jié)約成本、提高效益有著極大的影響。而目前國內(nèi)電廠仍沿用小指標評價對鍋爐系統(tǒng)的能效水平做出判斷,這難以系統(tǒng)化了解鍋爐系統(tǒng)運行水平。 本文充分認識到研究鍋爐系統(tǒng)能效評價方法的重要性,從研究鍋爐系統(tǒng)能效分析方法入手,結(jié)合環(huán)境燃料管理等多方面能效影響因素,建立鍋爐系統(tǒng)能效評價指標體系,并利用模糊綜合評價方法,建立電站鍋爐系統(tǒng)能效評價模型。 本文首先開展了電站鍋爐系統(tǒng)能效分析的研究,并建立能效分析數(shù)學模型。根據(jù)(?)分析理論,分別建立鍋爐熱力系統(tǒng)的(?)分析模型和單個受熱面的(?)分布模型計算模型。并以此確定能效評價指標,建立多層次的電站鍋爐能效評價指標體系,為科學進行評價提供了良好的理論基礎。 本文在建立電站鍋爐能效評價模型時,運用熵權法和專家評議法相結(jié)合的組合方法做為對評價指標的賦權方法,這種方法主客觀因素相結(jié)合,具有較好的科學性。再采用模糊綜合評價法確定電站鍋爐系統(tǒng)能效總體評價模型。 最后,本文以1025t/h亞臨界鍋爐機組為研究對象,運用本文所提方法對其做了能效分析與評價,評價結(jié)果有很好的客觀性與準確性。 本文的研究意義在于建立完整的鍋爐系統(tǒng)能效綜合評價模型,可以對電站鍋爐系統(tǒng)的能效進行總體分析,并能得出實時能效水平,使得現(xiàn)場運行人員能夠及時掌握和了解鍋爐系統(tǒng)的能效狀況,為對其進行優(yōu)化調(diào)整提高效率提供依據(jù),從而使低碳經(jīng)濟背景下火電企業(yè)具有較高的市場競爭力。
[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.
【學位授予單位】：華北電力大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TM621.2

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本文編號：2335698