The waste gas of purification unit was recovered and utilized in the high sulfur coal to methanol plant. Using domestic advanced and efficient technology, the carbon dioxide content in waste gas was recovered and purified to obtain food grade liquid carbon dioxide. The problems found in operation were timely analysed and optimized. The construction and operation of the device realized energy saving and emission reduction of CO2 in coal chemical industry and meet the green, low - carbon sustainable development train of thought.%高硫煤制甲醇净化废气回收利用装置，采用国内先进技术高效回收净化废气中二氧化碳，制取食品级液体CO2，对装置开车过程中发现的问题及时分析优化整改。该装置建设运行，实现了CO2节能减排，符合煤化工产业绿色、低碳可持续发展思路。
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