摘要
针对焦炉气制甲醇驰放气中大量氢气及其空分单元中大量氮气未被有效利用这一问题,建立了焦炉气制甲醇联合驰放气合成氨过程模型,并采用氢资源利用率、?效率和产品成本等技术指标分析比较2 种工艺流程的技术经济性能。在新流程中,焦炉气制甲醇驰放气通过变压吸附分离得到氢气和其它可燃气体,其中氢气与空分单元的氮气用于合成氨。焦炉气联产甲醇和氨过程将氢利用率由63.4%提高到91.9%,其?效比焦炉气单产甲醇过程提高约10%。尽管焦炉气联产过程投资比单产甲醇过程高81.3%,但其产品成本低11.2%。
There are large amount of hydrogen in the off-gas and nitrogen in air separation components of COG-to-methanol (coke-oven gas-to-methanol, CGtM) processes. In this study, CGtM was integrated with an off-gas-to-ammonia (CGtMA) process, and the advantages and disadvantages of the above two processes were studied considering hydrogen utilization, exergy efficiency and product costs. In the integrated process, the off-gas was separated to hydrogen and other fuel gases by pressure swing adsorption, and hydrogen was then mixed with nitrogen from air separation for ammonia production. The results show that the hydrogen utilization efficiency increases from 63.4%(CGtM) to 91.9%, and the energy efficiency also increases by ~10% in CGtMA. The capital investment of the co-generation process is 81.3% higher than that of CGtM, but its product cost is 11.2% lower.
作者
项东
雷昕儒
XIANG Dong;LEI Xin-ru(College of Chemistry & Chemical Engineering, Anhui University, Hefei 230601, China)
出处
《高校化学工程学报》
EI
CAS
CSCD
北大核心
2019年第3期709-714,共6页
Journal of Chemical Engineering of Chinese Universities
基金
国家自然科学基金(21706001)
安徽省自然科学基金(1808085QB46)
关键词
焦炉气制甲醇
合成氨
流程模拟
技术经济分析
coke-oven gas-to-methanol
ammonia synthesis
process simulation
techno-economic analysis
