通过对某炼厂拟建长链醇类所需羰基合成气规格及总硫含量、杂质要求进行分析,在现有煤制氢装置的基础上新建一个净化系列用于生产羰基合成气.结合醇类合成装置对羰基合成气控制精度的要求,提出了预变换炉后预变换气作为主气源、预变换炉前粗合成气作为辅助气源补气的并行压力控制方案,并采用了粗配氢和细配氢两级配氢的控制方案,达到了氢碳比精确控制精度的要求.%A new purification system is established for carboxylic syngas production based on the existing coal to hydrogen unit by analyzing spec-ification ,total sulphur content and impurity requirement of the carboxylic syngas needed by thelong-chain aliphatic alcoholin some refining plant . Considering the requirement of alcohols synthesis unit on the precision of carboxylic syngas control ,this paper proposes the parallel pressure control scheme in which pre-shift gas serves as the major gas source after pre-shift converter and raw syngas servers as complimentary gas source before pre-shift converter ,and control scheme of two-stage hydrogenmatching ,rough hydrogen matching and fine hydrogen matching , which meets the requirements for the precision of carbon-hydrogen ratio control .
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