CAJ | 학술논문

采用 Aspen Plus 流程模拟软件对1800kt/a MTO 装置的中冷脱甲烷塔分离过程进行模拟和优化。选用RK-SOVE状态方程和RadFrac模块进行计算并与实际工况进行对比，验证了模型的可靠性。并对进料位置、中间冷却器位置和处理量进行灵敏度分析，着重考察了吸收剂使用量及其组成对分离效果的影响。模拟结果表明，预切割-脱甲烷工艺虽然在降低乙烯损失和吸收剂用量方面对吸收-脱甲烷工艺进行了改进，但是综合效果并不明显。灵敏度分析显示除预切割-脱甲烷工艺的吸收剂用量外，其余考察变量均存在最优值。
채용 Aspen Plus 류정모의연건대1800kt/a MTO 장치적중랭탈갑완탑분리과정진행모의화우화。선용RK-SOVE상태방정화RadFrac모괴진행계산병여실제공황진행대비，험증료모형적가고성。병대진료위치、중간냉각기위치화처리량진행령민도분석，착중고찰료흡수제사용량급기조성대분리효과적영향。모의결과표명，예절할-탈갑완공예수연재강저을희손실화흡수제용량방면대흡수-탈갑완공예진행료개진，단시종합효과병불명현。령민도분석현시제예절할-탈갑완공예적흡수제용량외，기여고찰변량균존재최우치。
A demethanizer separation process under the condition of propylene as refrigerant for 1800kt/a methanol to olefin(MTO) unit was simulated and optimized using Aspen Plus software. It was calculated and compared with actual operation conditions by using RK-SOVE practical state equation and RadFrac module. The reliability of the model was verified. It was made a sensitivity analysis for feeding location , intercooler location and handling capacity , and emphatically investigated the influence of absorbent flowrate and its components on the separation efficiency. The results showed that the comprehensive effects of precut-demethanizer process were not obvious,although it improved the absorption-demethanizer process on the aspect of reducing ethylene loss and absorbent dosage. Sensitivity analysis showed that the optimal values existed for the examined variables except absorbent dosage of precut-demethanizer process.