摘要
为了研究多联产在节能和减排方面的表现,应用Aspen模拟软件设计并模拟了3个不同工艺路线多联产系统。运用有效能理论计算并分析了各多联产系统总效率及各子系统损失,同时计算了碳捕集率和排放率。得出当化工端合成气分流比分别为25%(案例-1)、75%(案例-2)、100%(案例-3)时,费托(FT)合成油的值分别为1039.02MW、2928.91MW以及3905.22MW,发电的值分别为2596.1MW、1235.4MW以及476.4MW,系统总效率分别为42.80%、49.87%以及52.46%。多联产系统的损失主要分布在伴随着化学转化的气化过程、FT合成过程和分离过程。随着化工端合成气分流比的增加,二氧化碳的捕集率从79.36%减少到52.98%,而排放的碳单质也从占输入系统总碳量的5.32%下降到3.01%。结果表明:系统总效率随着合成气的化学转化程度增大而增大,化工端比动力端对系统效率有更大影响;串联型多联产与并联型多联产相比能够更加高效、合理地利用能量;随着合成气用于化工端的比例增加,碳排放随之减少。
For researching the performance of polygeneration systems in energy saving and emission reduction,three different polygeneration systems were designed and modeled by Aspen software.Based on the exergy theory,the total exergy efficiency and the exergy losses of sub-systems were simulated.Carbon capture ratio and carbon emission ratio were also analyzed.When the syngas split ratio of the chemical engineering side was25%(Case-1),75%(Case-2)and100%(Case-3)the FT Syncrude exergy was1039.02MW,2928.91MW and3905.22MW,and the electricity exergy was2596.1MW,1235.4MW and476.4MW with the total exergy efficiency of42.80%,49.87%and52.46%,respectively.The exergy losses were mainly distributed in the process getting along with the chemical exergy transformation such as the gasification,the FT synthesis and the separation processes.With increasing syngas split ratio in the chemical engineering side,the carbon dioxide capture ratio decreaseed from79.36%to52.98%.And the proportion of the carbon emission to the total carbon input fell from5.32%to3.01%.The results showed that the total exergy efficiency rose with increasing chemical exergy conversion degree.The chemical engineering side had a greater impact on exergy efficiency than power side.The tandem type polygeneration systems had more efficient and reasonable energy utilization than the polygeneration systems in parallel.The carbon emission reduced with increasing the yngas amount in the chemical engineering side.
作者
于戈文
王延铭
杨小丽
吴刚强
YU Gewen;WANG Yanming;YANG Xiaoli;WU Gangqiang(Chemistry and Chemical Engineering School,Inner Mongolia University of Science,Baotou 014010,Inner Mongolia,China)
出处
《化工进展》
EI
CAS
CSCD
北大核心
2017年第10期3682-3689,共8页
Chemical Industry and Engineering Progress
基金
国家自然科学研究基金(21466029)
内蒙古自然科学研究基金(2014MS0210)项目
