关键词: font-family:-apple-system, blinkmacsystemfont, ", font-size:14px, background-color:#FFFFFF, ">闭式热泵精馏, 低温甲醇洗, 热再生气系统, 能耗, 压缩比, 年总费用, 热力学效率

Abstract: Aiming at the problem of excessive energy consumption in the thermal regeneration system of a rectisol process in a certain petrochemical engineering company, process improvement is carried out. A closed thermal pump distillation model was proposed using the NRTL thermodynamic model, with annual total cost and thermodynamic efficiency as the objective functions. The economic and energy-saving effects under different compression ratios were analyzed. Compared with conventional distillation, the total energy consumption was reduced by 62.71% when the compression ratio was 1.8; the annual total cost was reduced by 15.64% when the payback period was 5 years; the annual total cost was reduced by 32.79% when the payback period was 8 years; the thermodynamic efficiency was improved from the original 8.78% to 20.96%, which has excellent economic and energy-saving benefits, and the results of the study are expected to provide guidance for the development and design of advanced heat pump distillation technology.

Key words: font-family:-apple-system, blinkmacsystemfont, ", font-size:14px, background-color:#FFFFFF, ">closed heat pump distillation, rectisol, thermal regeneration system, energy consumption, compression ratio, annual total cost, thermodynamic efficiency