裴亚萍1，乔冬1，范箫艺1，王会串2
（1 运城职业技术大学，山西 运城 044000；2 山西天宇气体有限公司，山西 临猗 044100）
摘要：随着碳减排和碳中和步伐的加快，回收利用工业尾气CO2 气体的项目和生产设备日趋广泛。为进一步提升回收制备的食品添加剂液体二氧化碳纯度，本文总结了某公司通过在提纯塔和精馏塔的底部增设盘管，使用液氨代替蒸汽伴热管，改造2 万吨/年食品添加剂液体CO2 净化装置，产品纯度、总硫、总烃、CO、N2 残留量控制到了预期效果，为高标准食品级二氧化碳生产工艺改进及降低运行成本提供了有效的技术参考。关键词：食品添加剂液体CO2 ；设备升级改造；纯度提升
Research on the Improvement of the Purity of Liquid Carbon Dioxide in Food Additives
PEI Ya-Ping1，QIAO Dong1，FAN Xiao-yi1，WANG Hui-chuan2
（1 Yuncheng Vocational and Technical University，Yuncheng 044000，China；2 Shanxi Tianyu Gas Co.，Ltd.Linyi 044100，China）
Abstract: With the acceleration of the national carbon reduction and carbon neutrality strategy，gas projects andproduction equipment for recycling industrial CO2 are becoming more and more extensive. In order to further improvethe purity of liquid carbon dioxide of food additives prepared by recycling process，this paper summarized that acompany has modified the 20，000 tons/year liquid CO2 purification device for food additives by adding coils at thebottom of the purification tower and rectification tower，and using liquid ammonia instead of steam trace pipe. Theproduct purity，total sulfur，total hydrocarbon，CO and N2 residues were controlled to the expected effect. It providesan effective technical reference for the improvement of high standard food grade carbon dioxide production processand the reduction of operating costs.
Key words: food additive liquid carbon dioxide；equipment upgrading；purity enhancement
中图分类号：TS202.3 文献标志码：A 文章编号：1007-7871（2024）03-0035-04
2024，Vol.27，No.3