为解决燃烧前捕集硫碳共脱系统高能耗等问题，建立了贫液、半贫液流程的硫碳共脱系统计算模型，根据计算模型考察了吸收压力、原料气负荷、解析压力及再沸器负荷等关键参数对吸收及解析过程的影响。模拟计算结果表明，为保持较高的捕集率，吸收压力 ≥ 2.0 MPa，原料气负荷 ≤ 110%，再生塔解析压力约50 kPa，再沸器负荷约2 400 kW，MDEA硫碳共脱CO₂捕集率 ≥ 99%，系统能耗约为2.19 GJ/t。

To solve the high energy consumption problem in the joint sulfur and carbon dioxide capture and removal system before combustion,the lean and semi-lean solution calculation models are built up for the sulfur and carbon dioxide joint capture and removal system.According to calculation models,the effects of absorption pressure,feedstock gases load,desorption pressure and reboiler duty on the absorption and desorption process are studied.The simulation results show that the capture rate of CO₂ by the MDEA sulfur and carbon dioxide joint removal system can be no less than 99% and the energy consumption of the system will be 2.19 GJ·t^-1 when absorption pressure remains no less than 2.0 MPa,feedstock gases load is no more than 110%,the desorption pressure in the regeneration tower is around 50 kPa and reboiler duty is 2 400 kW.