Taking the tail gas from the low-temperature methanol washing unit as feedstock,high-purity electronic grade carbon dioxide is prepared through distillation under low temperature and low pressure by utilizing LNG cold energy.The feasibility for separating impurities from carbon dioxide under low temperature and low pressure is analyzed,and the utilization mode of LNG cold energy in carbon dioxide purification are explored.The preparation of high-purity carbon dioxide coupled with LNG cold energy has been achieved,with a power consumption being only 30.7％that of the traditional medium pressure distillation process.
关键词
高纯二氧化碳/LNG冷能利用/低温精馏/分离提纯/工艺模拟
Key words
high-purity carbon dioxide/LNG cold energy utilization/low temperature distillation/separation and purification/process simulation
维普
万方数据