本文關鍵詞：太陽能輔助燃煤機組碳捕集系統(tǒng)性能研究　出處：《華北電力大學(北京)》2016年碩士論文　論文類型：學位論文

  更多相關文章： 太陽能 燃煤機組 碳捕集 熱力性能分析 (?)分析

【摘要】：基于MEA溶液的燃燒后碳捕集方法是減輕溫室效應的主要途徑之一,然而該方法會消耗大量的汽輪機抽汽,造成燃煤機組系統(tǒng)效率的嚴重下降,將太陽能熱量引入該系統(tǒng)可以在一定程度上彌補這種能量懲罰。本文提出了兩種太陽能輔助燃煤機組碳捕集的系統(tǒng)集成方案,方案一為利用槽式太陽能集熱場收集的熱量來替代燃煤機組汽輪機的高壓抽汽,被替代的抽汽在汽輪機中繼續(xù)做功,用來彌補部分碳捕集單元的再生能耗；方案二是將槽式太陽能集熱場收集的熱量直接用來提供碳捕集單元MEA富液再生所需的能耗,不足部分由汽輪機抽汽提供。此外,本文利用燃煤機組碳捕集系統(tǒng)作為參比系統(tǒng)與這兩種方案進行對比分析。本文利用Aspen Plus軟件對基于MEA的燃燒后碳捕集系統(tǒng)進行模擬,利用Ebsilon Professional軟件對燃煤機組以及太陽能集熱場進行模擬,通過主要數(shù)據(jù)的傳遞實現(xiàn)模型的對接,分別搭建太陽能輔助碳捕集系統(tǒng)方案一、方案二以及參比系統(tǒng)的熱力系統(tǒng)模型。在此基礎上,分別計算了三個系統(tǒng)的熱力性能指標(熱效率、煤耗率、光電轉換效率)以及經(jīng)濟性能指標(發(fā)電成本、CO2規(guī)避成本),進行對比分析。此外,本文基于(?)分析理論,分別計算太陽能輔助燃煤機組碳捕集系統(tǒng)方案一、方案二以及參比系統(tǒng)中各設備的(?)效率,找出(?)效率較低的設備,分析原因并提出改進方案。結果表明：(1)對燃煤機組采取碳捕集措施之后,系統(tǒng)總功率下降了160.50MW。采用方案一可以補償57.17MW的功率,采用方案二可以補償39MW的功率。(2)太陽能輔助燃煤機組碳捕集系統(tǒng)方案一比方案二輸出功率多18.17MW;光電轉換效率高出10.82%；煤耗率低6.19 g/kWh；COE低0.47$/MWh;CO2規(guī)避成本低0.7$/tCO2；而系統(tǒng)熱效率低0.57個百分點�？傮w上來說,方案一要優(yōu)于方案二。(3)太陽能集熱場和鍋爐是系統(tǒng)中(?)效率比較低的設備。而且方案一的鍋爐(?)效率高于方案二和參比系統(tǒng),方案一的太陽能集熱場效率高于方案二。
[Abstract]:MEA solution based carbon capture method after combustion is one of the main ways to reduce Greenhouse Effect, however, this method will consume a lot of steam turbine extraction, resulting in a serious decline in system efficiency of coal-fired units. Introducing solar energy heat into the system can compensate for this energy penalty to a certain extent. In this paper, two kinds of solar assisted coal-fired unit carbon capture system integration scheme is proposed. The first scheme is to use the heat collected from the trough solar energy collector field to replace the high-pressure extraction steam of the coal-fired unit steam turbine, and the replaced extraction steam will continue to work in the steam turbine to compensate for the regeneration energy consumption of some carbon capture units. The second scheme is to directly use the heat collected from the trough solar energy collection field to provide the energy consumption needed for MEA rich regeneration of carbon capture unit, and the insufficient part is provided by steam extraction of steam turbine. In this paper, the carbon capture system of coal-fired units is used as a reference system to compare and analyze the two schemes. The Aspen Plus software is used to simulate the post-combustion carbon capture system based on MEA. Ebsilon Professional software is used to simulate the thermal field of coal-fired units and solar energy, and the model docking is realized through the transfer of main data. The thermodynamic system models of solar-assisted carbon capture system scheme 1, scheme 2 and reference system are built, and the thermal performance indexes (thermal efficiency, coal consumption rate) of the three systems are calculated respectively. Photoelectric conversion efficiency) and economic performance index (generation cost, CO _ 2 circumvention cost, comparative analysis). In addition, this paper based on? Analysis theory, respectively calculate the solar assisted coal-fired unit carbon capture system scheme 1, scheme 2 and the reference system of the equipment? (efficiency, find out? For the inefficient equipment, the causes are analyzed and the improvement scheme is put forward. The result shows that the carbon capture measures are adopted for the coal-fired units. The total power of the system is reduced by 160.50MW. The first scheme can compensate 57.17MW power. The second scheme can compensate 39MW power. (2) the carbon capture system of solar auxiliary coal-fired unit is 18.17MW more than that of the second scheme. The efficiency of photoelectric conversion is higher than that of 10.82; The coal consumption rate is 6.19 g / kWh; COE was 0.47% lower than MWh; The cost of CO2 avoidance is 0.7 / t CO _ 2; The thermal efficiency of the system is 0.57 percentage points lower. Overall, the first scheme is better than the second one. 3) the solar energy collecting field and boiler are in the system. ) inefficient equipment. And scheme one boiler? The efficiency of scheme 1 is higher than that of scheme 2 and reference system, and the efficiency of solar energy field of scheme 1 is higher than that of scheme 2.
【學位授予單位】：華北電力大學(北京)
【學位級別】：碩士
【學位授予年份】：2016
【分類號】：TM621;TM615

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本文編號：1362035