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不同烟气CO2含量下近等温相变捕集工艺调节策略模拟分析
Simulation and analysis of regulation strategies for near isothermal phase change capture process under different CO2 content of flue gas
- 低碳化学与化工 2024, 49(7): 69-75.
- 作者机构：
1.四川大学 化学工程学院，四川 成都 610065
2.四川大学 新能源与低碳技术研究院，四川 成都 610065
- 作者简介：
常栋渊（1999—），硕士研究生，研究方向为CO2捕集工艺，E-mail：2259476153@qq.com。
唐思扬（1987—），博士，副教授，研究方向为化学反应工程和催化剂构效关系，E-mail：siyangtang@scu.edu.cn。
- 基金信息：四川省先进建筑材料产教融合创新示范平台(川材教[2022]106号)
DOI：10.12434/j.issn.2097-2547.20240141
中图分类号： TQ021.8纸质出版日期：2024-07-25，
收稿日期：2024-04-04，
修回日期：2024-05-13，
- 稿件说明：
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常栋渊,唐思扬,钟山等.不同烟气CO2含量下近等温相变捕集工艺调节策略模拟分析[J].低碳化学与化工,2024,49(07):69-75.
CHANG Dongyuan,TANG Siyang,ZHONG Shan,et al.Simulation and analysis of regulation strategies for near isothermal phase change capture process under different CO2 content of flue gas[J].Low-carbon Chemistry and Chemical Engineering,2024,49(07):69-75.
常栋渊,唐思扬,钟山等.不同烟气CO2含量下近等温相变捕集工艺调节策略模拟分析[J].低碳化学与化工,2024,49(07):69-75. DOI： 10.12434/j.issn.2097-2547.20240141.
CHANG Dongyuan,TANG Siyang,ZHONG Shan,et al.Simulation and analysis of regulation strategies for near isothermal phase change capture process under different CO2 content of flue gas[J].Low-carbon Chemistry and Chemical Engineering,2024,49(07):69-75. DOI： 10.12434/j.issn.2097-2547.20240141.
摘要
CO
2
相变捕集工艺具有较低的再生能耗，但在实际生产中，上游工艺产生的烟气中CO
2
含量（物质的量分数，下同）不稳定，可导致工艺的整体能耗发生变化，因此需研究不同烟气CO
2
含量下该工艺参数的调节策略。通过Python语言调用Aspen Plus对近等温CO
2
相变捕集工艺进行了模拟计算，分析了不同CO
2
含量下吸收塔温度（
t
a
）、解吸塔温度（
t
d
）、液/气比（
v
）、胺浓度（
c
）、解吸液循环比（
s
）对再生能耗和CO
2
捕集率的影响以及相
应的调节策略。结果表明，
t
d
对CO
2
捕集率的影响最显著，当CO
2
含量为5.00%时，其相关性系数最高（74.78%）；
t
a
对再生能耗的影响最显著，当CO
2
含量为20.00%时，其相关性系数最高（-55.26%）。在维持CO
2
捕集率大于等于90.00%的条件下，随着CO
2
含量从5.00%升高至20.00%，再生能耗从2.35 GJ/t降低至2.13 GJ/t。此外，应根据CO
2
含量对
t
a
、
t
d
、c
和
v
进行相应调节，以确保CO
2
捕集率大于等于90.00%并且再生能耗最低。
Abstract
The CO
2
phase change capture process has low regeneration energy consumption
but in actual production
the CO
2
content (mole fraction
the same below) in flue gas generated by the upstream process is unstable
which can lead to changes in the overall energy consumption of the process. Therefore
it is necessary to study the adjustment strategies of the process parameters under different CO
2
content of flue gas. Using Python to invoke Aspen Plus to simulate the near isothermal CO
2
capture technology
and the effects of adsorption tower temperature (
t
a
)
desorption tower temperature (
t
d
)
liquid/gas ratio (
v
)
amine concentration (
c
) and desorption liquid circulation ratio (
s
) on the regeneration energy consumption and CO
2
capture rate and the corresponding regulation strategies were analyzed. The results show that
t
d
has the most significant effect on CO
2
capture rate
and the correlation coefficient is the highest (74.78%) when the CO
2
content is 5.00%.
t
a
has the most significant impact on regeneration energy consumption
and when CO
2
content is 20.00%
its correlation coefficient is the highest (-55.26%). With the CO
2
content increases from 5.00% to 20.00%
the regeneration energy consumption decreases from 2.35 GJ/t to 2.13 GJ/t
under the condition that the CO
2
capture rate is greater than 90.00%. In addition
t
a
t
d
c
and
v
should be adjusted accordingly according to CO
2
content to ensure that CO
2
capture rate is greater than 90.00% and the regeneration energy consumption is lowest.
关键词
CO2捕集工艺过程模拟CO2含量热泵系统参数调节
Keywords
CO2 capture processprocess simulationCO2 contentheat pump systemparameters adjustment
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