阅读说明：本技术 制备甲醇合成气的方法 (Method for preparing methanol synthesis gas ) 是由 P·J·达尔 T·罗斯特鲁普-尼尔森 于 2020-01-16 设计创作，主要内容包括：制备甲醇合成气的方法,其包括以下步骤：(a)提供包含烃和蒸汽的第一进料流；(b)提供包含二氧化碳的第二进料流,二氧化碳的量在第二进料流与第一物流混合时导致二氧化碳/烃比率介于01.和0.8之间,优选介于0.15和0.7之间；(d)将第一物流和第二物流引入包括蒸汽转化步骤和自热转化步骤的两步蒸汽转化阶段；(e)排出第一合成气流；(f)提供包含氢气的第三进料流；和(g)应用第一合成气流和第三进料流作为甲醇合成气。本发明另外提供改造现有的甲醇合成气装置的方法,其适用于实施根据本发明的第一方面的制备甲醇合成气的方法。(A process for the preparation of methanol synthesis gas comprising the steps of: (a) providing a first feed stream comprising a hydrocarbon and steam; (b) providing a second feed stream comprising carbon dioxide in an amount that results in a carbon dioxide/hydrocarbon ratio of between 01 and 0.8, preferably between 0.15 and 0.7, when the second feed stream is mixed with the first stream; (d) introducing the first stream and the second stream into a two-step steam reforming stage comprising a steam reforming step and an autothermal reforming step; (e) discharging a first syngas stream; (f) providing a third feed stream comprising hydrogen; and (g) using the first synthesis gas stream and the third feed stream as methanol synthesis gas. The present invention additionally provides a method of retrofitting an existing methanol synthesis gas plant which is suitable for carrying out the method of preparing methanol synthesis gas according to the first aspect of the invention.)