[Q&A Question 336] 2017.12.20
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This post was last edited by liuquan1100 on 2017-12-31 at 20:45. [Q&A Question No. 336] Why must all the hydrogen be circulated when the hydrogenation unit is shut down on 2017.12.20? Answers: (1) To shorten the time during which oil is present; (2) To accelerate cooling; (3) To purge the catalyst and protect its activity. (Unless otherwise specified, all Q&A questions are based on hydrogenation units.) ) For management purposes, if you need to view content from a few days ago, please go through the summary post below. 2017 Q&A Summary Thread (updates have begun) https://bbs.hcbbs.com/thread-1657793-1-1.html 2017 Daily Question Summary Thread (updates have begun) https://bbs.hcbbs.com/thread-1657794-1-1.html 2017 Daily Image Summary Thread https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=1875160 2017 LNG Version Daily Question List https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=1804162 2016 Q&A Summary Thread (updates completed) https://bbs.hcbbs.com/thread-1597792-1-1.html
1. Reduce the time with oil applied； 2. Fast cooling rate ； 3. Purge the catalyst bed to protect its activity.
Answer: (1) Reduce the oil exposure time; (2) Achieve a fast cooling rate; (3) Purge the catalyst bed to protect its activity.
(1) Reduce the oil-carrying time； (2) Fast cooling rate ； (3) Purge the catalyst bed to protect its activity
(1) Reduce the time spent with oil present; (2) Fast cooling rate; (3) Purge the catalyst bed to protect its activity.
Hydrogen is carried along with oil, resulting in a fast cooling rate; the catalyst is purged to preserve its activity
1) Reduce the time in contact with oil. (2) Fast cooling rate. (3) Purge the catalyst to preserve its activity.
Thoroughly purge the oil remaining on the catalyst surface inside the reactor
(1) Reduce the oil-carrying time； (2) Fast cooling rate ； (3) Purge the catalyst bed to protect its activity.
(1) Reduce the time spent with oil present; (2) Fast cooling rate; (3) Purge the catalyst bed to preserve its activity