本文選題：碳捕集　切入點：動態(tài)模擬　出處：《內(nèi)蒙古大學》2017年碩士論文　論文類型：學位論文

【摘要】：溫室氣體主要組成為二氧化碳(CO2)、水蒸氣、一氧化氮(NO)等氣體,其中二氧化碳對溫室效應影響最大,因此未來二氧化碳減排將勢在必行。乙二胺法(monoethanolamine(MEA))燃燒后碳捕集技術(Post-Combustion Carbon Capture Process)目前被認為是可靠、可行的碳捕集技術之一,其過程簡單、不需要進行大量改進,有利于在現(xiàn)有火電廠基礎上進行改造,同時該方法也適用于新建電廠。基于此,本文研究了商業(yè)化乙二胺法燃燒后碳捕集工藝的靜態(tài)和動態(tài)模型。首先,本文基于靜態(tài)模型重點考察了吸收塔以及再生塔塔高變化的經(jīng)濟性分析,并對關鍵參數(shù)進行分析對比。通過Aspen Plus靜態(tài)模擬,結果表明,當吸收塔以及再生塔塔高同時增長20%時,最終年總費用降到最低。因此兩塔高度同時增加20%的模型為最經(jīng)濟模型。然后,通過動態(tài)模擬考察了經(jīng)濟模型在有擾動引入情況下碳捕集工藝的動態(tài)表現(xiàn)。與參照模型相比,模擬結果顯示10%再沸器負荷擾動對雙塔塔高增加20%的經(jīng)濟模型影響與參照模型相似。二氧化碳質(zhì)量流率以及二氧化碳捕集率需要較長時間達到穩(wěn)態(tài)。另外,由于電廠每日不同時段發(fā)電量有所變化,因此煙氣排放因時而異�；诖�,本文以進口煙氣量作為擾動,對各設備單元關鍵參數(shù)影響進行研究。研究發(fā)現(xiàn),進口煙氣流量增加10%時,再沸器熱負荷不變,二氧化碳捕集率大幅下降。動態(tài)模擬結果對于設計常見及高級碳捕集工藝控制系統(tǒng)至關重要。
[Abstract]:The main components of greenhouse gases are carbon dioxide (CO _ 2), water vapor, nitric oxide (no) and other gases, among which carbon dioxide has the greatest influence on Greenhouse Effect. So it will be imperative to reduce carbon dioxide emissions in the future. Post-Combustion Carbon Capture process (Post-Combustion Carbon Capture process) is considered one of the reliable and feasible carbon capture technologies, and the process is simple and does not need to be greatly improved. This method is suitable for new power plants. Based on this, the static and dynamic models of commercial ethylenediamine combustion carbon capture process are studied. Based on the static model, the economic analysis of the height variation of absorption tower and regenerated tower is studied, and the key parameters are analyzed and compared. Through Aspen Plus static simulation, the results show that when the height of absorption tower and regenerated tower increases 20% at the same time, The final annual total cost is reduced to the minimum. Therefore, the model with two tower heights increasing by 20% at the same time is the most economical model. Then, the dynamic performance of the economic model under the condition of disturbance introduction is investigated by dynamic simulation. Compared with the reference model, the dynamic behavior of the model is compared with that of the reference model. The simulation results show that the effect of the 10% reboiler load disturbance on the economic model of the twin tower height increase of 20% is similar to that of the reference model. The carbon dioxide mass flow rate and carbon dioxide capture rate need to reach steady state for a long time. Due to the variation of power generation at different times of day in power plant, flue gas emission varies from time to time. Based on this, the influence of key parameters of each equipment unit is studied by using imported flue gas quantity as disturbance. When the imported flue gas flow increases by 10, the heat load of the reboiler keeps constant, and the carbon dioxide capture rate decreases significantly. The dynamic simulation results are very important for the design of common and advanced carbon capture process control systems.
【學位授予單位】：內(nèi)蒙古大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：X773

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