【Q&A Question 315】November 29, 2017
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【Q&A Question 315】November 29, 2017: Why is it necessary to use hot hydrogen at a constant temperature to carry the oil after shutting down the hydrogenation process? After the hydrogenation process is stopped, a large amount of oil remains in the catalyst bed. If this oil is not removed, it will hinder the subsequent regeneration of the catalyst and cause coking. Therefore, it is necessary to eliminate all the remaining oil after the process stops; this is also essential for ensuring safety during that period. (Unless otherwise specified, all questions and answers 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) http://bbs.hcbbs.com/thread-1657793-1-1.html 2017 Daily Question Summary Thread (updates have begun) 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 (Source: Haichuan Chemical Industry Forum)
After the hydrogenation process is stopped, a large amount of oil remains in the catalyst bed. If this oil is not removed, it will hinder the subsequent regeneration of the catalyst and cause coking. Therefore, it is necessary to eliminate all the remaining oil after the process stops; this is also essential for ensuring safety during that period
1. Remove all the oil from the catalyst to prevent coking as the catalyst temperature rises during operation. 2. At high temperatures, release the hydrogen that has entered the pipelines to avoid hydrogen embrittlement
The catalyst bed still contains a large amount of oil; if not removed, this will hinder the subsequent regeneration of the catalyst and cause coking
There are two main reasons for using hot hydrogen to remove oil: one is to protect the catalyst, as a large amount of oil remains in the catalyst bed; if this oil is not removed, it will hinder the subsequent regeneration of the catalyst and cause coking. The other reason is to use hot hydrogen to carry away the oil that has penetrated into the surface of the catalyst and the pipelines, thereby preventing natural reactions that could occur when air enters these pipelines and equipment.
After the hydrogenation process is stopped, a large amount of oil remains in the catalyst bed. If this oil is not removed, it will hinder the subsequent regeneration of the catalyst and cause coking. Therefore, it is necessary to eliminate all the remaining oil after the process stops; this is also essential for ensuring safety during that period.
After the hydrogenation process is stopped, a large amount of oil remains in the catalyst bed. If this oil is not removed, it will hinder the subsequent regeneration of the catalyst and cause coking. Therefore, it is necessary to eliminate all the remaining oil after shutdown, which is also a measure to ensure safety during this period.
After the hydrogenation process is stopped, a large amount of oil remains in the catalyst bed. If this oil is not removed, it will hinder the subsequent regeneration of the catalyst and cause coking. Therefore, it is necessary to eliminate all the remaining oil after the process stops; this is also essential for ensuring safety during the shutdown period. .
After the hydrogenation process is stopped, a large amount of oil remains in the catalyst bed. If this oil is not removed, it will hinder the subsequent regeneration of the catalyst and cause coking. Therefore, it is necessary to eliminate all the remaining oil after the process stops; this is also essential for ensuring safety during that period.
After the hydrogenation process is stopped, a large amount of oil remains in the catalyst bed. If this oil is not removed, it will hinder the subsequent regeneration of the catalyst and cause coking. Therefore, it is necessary to eliminate all the remaining oil after the process stops; this is also essential for ensuring safety during that period.