云南化工2023，Vol.50Issue(12)：82-87,6.DOI:10.3969/j.issn.1004-275X.2023.12.21
碳捕集系统中贫富液换热器的热经济学优化研究
Thermoeconomics Optimization of the Heat Exchanger in the Carbon Capture System
摘要
Abstract
Based on the data of the 150000 t/a CO2 capture system at Jinjie Power Plant,an enhanced lean-rich liquid heat exchanger is used to recover the energy of the lean solution in the CO2 capture system.Taking the maximum annual return as the objective function,comprehensive-ly considering the value of the heat recovered in the waste heat recovery,the initial investment of the equipment and the operating cost of the e-quipment,an optimal mathematical model is established and solved.According to the characteristics of steam in the capture system that firstly does work and then supplies heat,the calculation formula of cogeneration heat price is innovatively proposed,and the influence of cogeneration heat price and ordinary boiler heating heat price on the optimization results is compared and analyzed.The optimization results show that com-pared with the heat price of boiler heating,the heat transfer area of rich and poor liquid heat exchanger optimized according to the heat price of cogeneration is small,which can simplify the system.Moreover,the larger heat transfer temperature difference is easier to realize for the heat ex-changer.Therefore,in the optimization of rich and poor liquid heat exchanger,the results obtained by using cogeneration heating heat price opti-mization are more reasonable.When the cogeneration heat price is used to optimize heat exchanger,900 kW heat can be recovered from the lean liquid,the carbon dioxide capture can reduce the steam consumption by0.36 kg/s,and the energy saving rate is 6.2%.关键词
CO2捕集系统/贫富液换热器/热电联产热价/热经济学/优化Key words
carbon capture/lean and rich liquid heat exchanger/cogeneration heat price/thermoeconomics/optimization分类
化学化工引用本文复制引用
韩冰,金赫,田相峰..碳捕集系统中贫富液换热器的热经济学优化研究[J].云南化工,2023,50(12):82-87,6.基金项目
龙源电力立项科技项目《燃煤电厂化学吸收法CO2 捕集系统能量分析及优化》(LYH-2021-05). （LYH-2021-05）
