甲醇制氢装置中“6-1-3”变压吸附提氢工艺的应用

Application of “6-1-3” PSA process for purifying hydrogen in methanol-to-hydrogen unit

宁夏金裕海1200Nm^3/h甲醇制氢装置采用"6-1-3"变压吸附提氢工艺,为异构化装置提供体积分数99.9%的氢气。从吸附塔吸附再生过程程控阀的切换,时间设定原则及"5-1-2"备用工序等几个方面对甲醇制氢装置中PSA提氢工艺开工过程进行介绍。开工初期,装置运行稳定,氢气纯度≥99.9%,回收率高达92%,为后续异构装置提供稳定的气源。

The "6-1-3" pressure swing absorption(PSA) process was adopted in Ningxia Jinyuhai 1200 Nm3/h methanol-tohydrogen unit to provide a hydrogen with the purity of 99.9% by volume for the isomerization unit. PSA start-up process was introduced from the switching of sequencing valves during adsorption and regeneration processes, time setting principle and "5-1-2"standby process. During start-up stage, the device run steadily with a H2 purity of above 99.9% by volume and a recovery rate as high as 92%, and it could provide a stable gas source for subsequent isomerization unit.