【Daily Question No. 124】2017.05.04

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This post was last edited by liuquan1100 on 2017-5-4 05:54. [Daily Question No. 124] Before starting up the cycle hydrogen compressor and heating the reactor furnace, what should be introduced into the furnace tubes first? A. Air B. Nitrogen C. Hydrogen D. Steam. Reply to see the reference answer; points will be awarded for identifying the correct key point. (Unless otherwise specified, all questions and answers are based on hydrogenation units.) ) B grading criteria: 2 Wealth points for incorrect attempts; *incomplete* answers earn 3–8 points. 10 Wealth points are given for correct answers accompanied by detailed explanations; those with correct answers but incomplete supplementary *answers* receive 15–20 Wealth points. Please grade according to these criteria. 2017 Q&A Summary Thread (updates starting now) http://bbs.hcbbs.com/thread-1657793-1-1.html 2017 Daily Question Summary Thread (updates starting now) http://bbs.hcbbs.com/thread-1657794-1-1.html 2016 Q&A Summary Thread (updates completed) http://bbs.hcbbs.com/thread-1597792-1-1.html Petrochemical Sector – “Creative Ideas for Energy Saving” campaign (sponsors sought; highest returns ever) http://bbs.hcbbs.com/thread-1666758-1-1.html Sponsors are being sought for this campaign; those interested can contact the event organizer. Petrochemical deep processing version – the event to share pictures of chemical equipment has started! Huge amounts of wealth, as well as HChuan coins, are waiting for you to claim them: http://bbs.hcbbs.com/thread-1760733-1-1.html. Notice regarding the collection of chemical engineering technical materials in the “Petroleum and Chemicals Section”: http://bbs.hcbbs.com/thread-1614796-1-1.html (Source: HChuan Chemical Forum)