本文選題：低溫省煤器 + 燃煤鍋爐��； 參考：《華北電力大學(xué)》2017年碩士論文

【摘要】：近幾年來(lái),隨著我國(guó)對(duì)環(huán)保需求的提升,及發(fā)電技術(shù)水平的提高,如何降低煤耗、減少污染物排放,爭(zhēng)取市場(chǎng)占有率是各個(gè)發(fā)電集團(tuán)的首要問(wèn)題。因此,對(duì)鍋爐低溫?zé)煔膺M(jìn)行余熱回收、加以利用無(wú)疑是一項(xiàng)重要減排降耗措施。本文首先介紹了對(duì)煙氣余熱資源的分類(lèi)及可采取的余熱回收優(yōu)化方案,針對(duì)低溫?zé)煔鈱?duì)相關(guān)部件的腐蝕問(wèn)題進(jìn)行詳細(xì)的分析,并根據(jù)分析結(jié)果結(jié)合相關(guān)的理論與方法進(jìn)行驗(yàn)證,從而為下一步對(duì)低溫?zé)煔饣厥占跋到y(tǒng)改造方案,奠定了良好的基礎(chǔ)。結(jié)合理論基礎(chǔ),本文對(duì)三河電廠300MW燃煤機(jī)組進(jìn)行深入的分析與研究,并根據(jù)其機(jī)組實(shí)際運(yùn)行情況、現(xiàn)場(chǎng)設(shè)備布置,針對(duì)低溫?zé)煔庥酂峄厥赵O(shè)計(jì)提出切實(shí)可行的解決方案,并針對(duì)方案中回收裝置的布置、介質(zhì)來(lái)源與溫度的選取、熱交換裝置管材的選擇等方面進(jìn)行討論與研究,最終選擇以凝結(jié)水混水為介質(zhì)來(lái)對(duì)排煙余熱進(jìn)行回收的方案作為優(yōu)選改造方案。最后,本文針對(duì)300MW典型燃煤機(jī)組的節(jié)能改造方案進(jìn)行了全面的分析,并對(duì)低溫余熱回收改造方案的節(jié)能效果、水耗降低量、投資回報(bào)情況等,進(jìn)行了相關(guān)計(jì)算及分析。由于本機(jī)組為供熱機(jī)組,本文也對(duì)于夏季、冬季兩種不同運(yùn)行工況,就余熱回收改造后運(yùn)行方式進(jìn)行了初步分析�？隙说蜏厥∶浩鞯膽�(yīng)用價(jià)值。
[Abstract]:In recent years, with the improvement of environmental protection demand and the improvement of power generation technology in China, how to reduce coal consumption, reduce pollutant emissions and strive for market share is the most important issue for power generation groups. Therefore, recovery and utilization of waste heat from boiler flue gas at low temperature is undoubtedly an important measure to reduce emission and reduce consumption. In this paper, the classification of waste heat resource and the optimal scheme of waste heat recovery are introduced, and the corrosion problem of the parts caused by low temperature flue gas is analyzed in detail, and the results are verified by the relevant theories and methods. It lays a good foundation for the scheme of low-temperature flue gas recovery and system reconstruction. Combined with the theoretical basis, this paper makes a deep analysis and research on 300MW coal-fired units in Sanhe Power Plant. According to the actual operation of the units and the layout of field equipment, a feasible solution for the design of low-temperature flue gas waste heat recovery is put forward. The layout of the recovery device, the selection of the medium source and temperature, the selection of the pipe material of the heat exchanger are discussed and studied. In the end, condensate mixed water was used as the medium to recover the exhaust heat. Finally, this paper makes a comprehensive analysis on the energy saving retrofit scheme of 300MW typical coal-fired units, and makes relevant calculation and analysis on the energy-saving effect, water consumption reduction and investment return of the retrofit scheme of low-temperature waste heat recovery. Since the unit is a heat supply unit, this paper also makes a preliminary analysis on the operation mode after the waste heat recovery and transformation for two different operating conditions in summer and winter. The application value of low temperature economizer is confirmed.
【學(xué)位授予單位】：華北電力大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類(lèi)號(hào)】：TM621

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本文編號(hào)：2022318