本文選題：超超臨界 + 汽動引風機�。� 參考：《華北電力大學》2017年碩士論文

【摘要】：本文通過對國家節(jié)能減排改造計劃和蘇錫地區(qū)經濟發(fā)展的解讀,抓住區(qū)域小熱電關停和供熱需求持續(xù)新增這對主要矛盾,并分析660MW超超臨界機組由純發(fā)電改為熱電聯(lián)供的可行性。確定了可以通過改造引風機來新增供熱源。引風機改造同時還可以優(yōu)化鍋爐尾部風煙系統(tǒng),將原有引風機和增壓風機合二為一,簡化煙道結構,降低尾部煙氣阻力,提高鍋爐經濟性。論文主要研究內容有:1.由于新引風機需要替代原有引風機和增壓風機的出力,所以本文將詳細比較當前工業(yè)應用中各類常見的引風機調節(jié)方式和動力選型。根據(jù)以供熱為主要改造目標的實際需求,最后將風機選型確定為靜葉調節(jié)加回熱式背壓小汽輪機驅動。2.根據(jù)所擬選定的引風機選型方案,設定新的控制策略和邏輯。在探究新的設定時,本文將主要從引風機作為鍋爐重要輔機這個角度進行闡述。做為鍋爐重要輔機時,將分別討論引風機在啟動、正常運行、停用、RB事故工況,這四種不同的應用場景所對應不同的控制策略和邏輯。3.工業(yè)應用總離不開對經濟效益的分析,本文力求精確詳盡的對供熱所能產生的經濟效益、引風機改造的成本、所擬選定引風機選型方案的經濟性、環(huán)保性優(yōu)勢等方面進行分析。
[Abstract]:Based on the analysis of the National Energy-saving and Emission reduction Reconstruction Plan and the economic development of Suxi region, this paper grasps the major contradiction between the shutdown of small regional heat and power plants and the continuous increase of heat supply demand. The feasibility of converting 660 MW ultra-supercritical unit from pure generation to combined heat and power supply is analyzed. It is determined that the new heating source can be added by reforming the induced fan. At the same time, the retrofit of induced fan can optimize the air smoke system at the back of the boiler, combine the original draft fan with the pressurized fan, simplify the flue structure, reduce the flue gas resistance, and improve the boiler economy. The main content of this thesis is: 1. Since the new induced fan needs to replace the original induced fan and the pressurized fan, this paper will compare in detail various kinds of common regulating ways and power selection of the induced fan in the current industrial application. According to the actual demand of taking heat supply as the main target of retrofit, the type selection of fan is determined to be the drive of small steam turbine with static vane regulation plus regenerative backpressure. The new control strategy and logic are set according to the selected scheme of draft fan selection. In order to explore the new timing, this paper will mainly from the point of view of the draft fan as an important auxiliary machine of boiler. As an important auxiliary machine of boiler, this paper discusses the starting, normal operation and stopping of RB accident condition of induced fan respectively. These four different application scenarios correspond to different control strategy and logic .3. The industrial application is always inseparable from the analysis of the economic benefits. This paper tries to make an accurate and detailed analysis of the economic benefits that can be generated by heating, the cost of the transformation of the induced fans, the economy of the selected scheme of the type selection of the induced fans, the advantages of environmental protection, and so on.
【學位授予單位】：華北電力大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TM621.3

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