【Daily Question】Catalytic Cracking, Coking, and Reforming Version 20170127
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To increase the popularity of this section, a daily quiz activity has been launched. The purpose of this activity is: “Learn a little bit every day, and make significant progress over ten days.” I hope everyone will participate actively; by learning and making progress, you can also easily bring wealth home :) . Participation: Prize of 3 Wealth ； Correct answer: Reward of 8 wealth points ； Note: Questions from the same day will receive full feedback if answered on the same day; answers given the next day will earn 3-5 wealth points. This post is valid for 48 hours. http://bbs.hcbbs.com/static/image/hrline/4.gif Multiple-choice question (Reformation section): After how long does the dry gas seal of the reformation cycle hydrogen compressor stop receiving isolation gas supply once the oil pump stops? ( ) A. 3 minutes B. 5 minutes C. 10 minutes D. 20 minutes Correct answer: C. http://bbs.hcbbs.com/static/image/hrline/4.gif The Petrochemical Sector – An activity aimed at generating new ideas for energy savings. http://bbs.hcbbs.com/thread-1666758-1-1.html Xiaomi phones are available for you to claim. A thread on the Petrochemical Section where chemical industry-related technical materials can be shared. http://bbs.hcbbs.com/thread-1654603-1-1.html Many prizes are waiting for you to win
I’ll choose D. But boss, what I’m sure of is that this issue only applies to your equipment; not all dry gas seals in units are designed according to your specifications. In principle, the isolation gas can remain flowing continuously, unless it’s not possible to maintain the required seal pressure at each level, in order to prevent the isolation gas from reaching the secondary seal. But usually, the isolation gas is connected to the atmosphere, so such a situation doesn’t occur, and there’s no need to shut down the equipment. If your unit really has to be shut down, I hope you can give some guidance so I can learn from it