強化結(jié)晶氨法捕碳工藝研究與能效優(yōu)化
發(fā)布時間：2018-10-19 13:54
【摘要】：基于300 MW燃煤電站,采用流程模擬軟件Aspen Plus,建立了傳統(tǒng)的氨法大規(guī)模捕集CO2的模型,同時建立了一種新型的氨法脫碳模型。進一步對比分析了新型氨法脫碳工藝與傳統(tǒng)的富液再生工藝的操作參數(shù)對脫碳效率、氨逃逸量、CO2出口流量以及再生能耗的影響。得出:新型的脫碳工藝在CO2的吸收與再生過程中較傳統(tǒng)工藝有較大的優(yōu)越性。在吸收過程中,新工藝在保證高的吸收反應(yīng)速率的同時,也保證了高的NH3利用率;再生過程中,新工藝再生的CO2量高出傳統(tǒng)工藝約30%,更重要的是,新工藝的再生能耗遠低于傳統(tǒng)工藝,當(dāng)選用最優(yōu)操作參數(shù)時新工藝的再生能耗僅為傳統(tǒng)工藝的41.5%。并對吸收反應(yīng)和結(jié)晶過程進行了實驗研究,驗證了仿真模擬關(guān)于吸收部分結(jié)論的正確性。建立典型300MW電站蒸汽循環(huán)模型,對不同的電站蒸汽負荷進行了定義、設(shè)置與分析。對額定負荷下的各抽取點的流率與電站實際數(shù)據(jù)進行了對比研究。以50%、75%、100%和最大負荷為變量,分析了各個抽汽點的溫度、壓力和流率、小汽機的物流和功流以及汽輪機熱耗率、機組熱耗率的模擬值與計算值,得出其與電站實際數(shù)據(jù)切合,驗證了模型的準(zhǔn)確性。建立了兩種捕碳工藝模型與電廠蒸汽循環(huán)的整合平臺。比較分析了兩種工藝模型與電廠整合的優(yōu)劣,主要從能耗以及對電廠發(fā)電量等方面進行對比分析,并得到:一方面從汽輪機低壓端位置抽取蒸汽對發(fā)電量的影響比從高壓端抽取蒸汽的影響更小;另一方面,新工藝能耗比傳統(tǒng)工藝要低很多,對電廠發(fā)電量的影響也比傳統(tǒng)工藝小,所以新工藝在節(jié)約能耗的方面比傳統(tǒng)工藝有很大的優(yōu)勢,即新工藝對電站脫碳系統(tǒng)的能效進行了優(yōu)化。通過本文可有望為以后的電站CO2捕集技術(shù)提供新的參考方法。
[Abstract]:Based on 300 MW coal-fired power station, the traditional model of large-scale capture of CO2 by ammonia process was established by using the process simulation software Aspen Plus, and a new model of ammonia decarbonization was also established. The effects of operating parameters of the new ammonia decarbonization process and the traditional rich liquid regeneration process on the decarburization efficiency, ammonia escape rate, CO2 outlet flow rate and regeneration energy consumption were further compared and analyzed. It is concluded that the new decarburization process is superior to the traditional process in the process of CO2 absorption and regeneration. In the process of absorption, the new process not only guarantees high absorption rate of reaction, but also ensures high utilization of NH3. In the process of regeneration, the amount of CO2 regenerated by the new process is about 30% higher than that of the traditional process, and more importantly, the amount of CO2 regenerated by the new process is about 30% higher than that of the traditional process. The regeneration energy consumption of the new process is much lower than that of the traditional process. When the optimal operating parameters are selected, the regeneration energy consumption of the new process is only 41.5 of that of the traditional process. The experimental study on absorption reaction and crystallization process verifies the correctness of the simulation results. The steam cycle model of typical 300MW power station is established, and the different steam load of power station is defined, set up and analyzed. The flow rate of each extraction point under rated load is compared with the actual data of the power station. The temperature, pressure and flow rate of each extraction point, the material flow and power flow of small steam turbine, the simulated value and calculation value of heat consumption rate of steam turbine and the heat consumption rate of unit are analyzed with 50% and 100% maximum load as variables, and the results are in accord with the actual data of the power station. The veracity of the model is verified. Two carbon capture process models and steam cycle integration platform in power plant are established. The advantages and disadvantages of the integration of the two process models with the power plant are compared and analyzed, mainly from the aspects of energy consumption and the power generation of the power plant. On the one hand, the influence of extracting steam from the low pressure end of steam turbine is less than that from the high pressure end; on the other hand, the energy consumption of the new process is much lower than that of the traditional process. The new process has a great advantage over the traditional process in saving energy consumption, that is, the new process optimizes the energy efficiency of the decarburization system of the power plant. This paper is expected to provide a new reference method for the future CO2 capture technology in power plants.
【學(xué)位授予單位】：哈爾濱工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TM621
本文編號：2281327
[Abstract]:Based on 300 MW coal-fired power station, the traditional model of large-scale capture of CO2 by ammonia process was established by using the process simulation software Aspen Plus, and a new model of ammonia decarbonization was also established. The effects of operating parameters of the new ammonia decarbonization process and the traditional rich liquid regeneration process on the decarburization efficiency, ammonia escape rate, CO2 outlet flow rate and regeneration energy consumption were further compared and analyzed. It is concluded that the new decarburization process is superior to the traditional process in the process of CO2 absorption and regeneration. In the process of absorption, the new process not only guarantees high absorption rate of reaction, but also ensures high utilization of NH3. In the process of regeneration, the amount of CO2 regenerated by the new process is about 30% higher than that of the traditional process, and more importantly, the amount of CO2 regenerated by the new process is about 30% higher than that of the traditional process. The regeneration energy consumption of the new process is much lower than that of the traditional process. When the optimal operating parameters are selected, the regeneration energy consumption of the new process is only 41.5 of that of the traditional process. The experimental study on absorption reaction and crystallization process verifies the correctness of the simulation results. The steam cycle model of typical 300MW power station is established, and the different steam load of power station is defined, set up and analyzed. The flow rate of each extraction point under rated load is compared with the actual data of the power station. The temperature, pressure and flow rate of each extraction point, the material flow and power flow of small steam turbine, the simulated value and calculation value of heat consumption rate of steam turbine and the heat consumption rate of unit are analyzed with 50% and 100% maximum load as variables, and the results are in accord with the actual data of the power station. The veracity of the model is verified. Two carbon capture process models and steam cycle integration platform in power plant are established. The advantages and disadvantages of the integration of the two process models with the power plant are compared and analyzed, mainly from the aspects of energy consumption and the power generation of the power plant. On the one hand, the influence of extracting steam from the low pressure end of steam turbine is less than that from the high pressure end; on the other hand, the energy consumption of the new process is much lower than that of the traditional process. The new process has a great advantage over the traditional process in saving energy consumption, that is, the new process optimizes the energy efficiency of the decarburization system of the power plant. This paper is expected to provide a new reference method for the future CO2 capture technology in power plants.
【學(xué)位授予單位】：哈爾濱工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TM621
【參考文獻】
相關(guān)期刊論文 前2條
1 晏水平;方夢祥;張衛(wèi)風(fēng);駱仲泱;岑可法;;煙氣中CO_2化學(xué)吸收法脫除技術(shù)分析與進展[J];化工進展;2006年09期
2 Jong-Beom Seo;Soo-Bin Jeon;Je-Young Kim;Gang-Woo Lee;Jong-Hyeon Jung;Kwang-Joong Oh;;Vaporization reduction characteristics of aqueous ammonia solutions by the addition of ethylene glycol, glycerol and glycine to the CO_2 absorption process[J];Journal of Environmental Sciences;2012年03期
，本文編號：2281327
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