【Q&A Question 230】2018.08.24
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【Q&A Question 230】August 24, 2018: Briefly explain why vacuuming and nitrogen purging are necessary for the reaction system. Since air remains in the system after it is built or maintained, pure nitrogen with a purity of >99.8% (by mole) must be introduced first before hydrogen is fed into the system. Vacuuming before nitrogen purging helps to reduce the amount of nitrogen required. (Unless otherwise specified, all questions and answers are based on hydrogenation units.) ) Correct: 3 wealth, Incorrect: 1 wealth ； Mass posting of posts – rated based on the lowest score ； Replies that are unrelated to the answer are considered spam and will be deleted immediately. For management purposes, if you need to view content from a few days ago, please go to https://bbs.hcbbs.com/home.php?mod=space&uid=3862647&do=thread&view=me&from=space through the summary post below
A rapid displacement system that saves nitrogen while achieving excellent displacement results. .
Since there is air present in the system after the installation is completed or during maintenance, it is necessary to introduce nitrogen with a purity of 99.9% before introducing hydrogen into the system, in order to carry out purging. This is done primarily to prevent hydrogen from exploding; evacuating the system first can help reduce the amount of nitrogen required. After the replacement, it is considered qualified only when the oxygen content in all samples reaches 0.5v.
Nitrogen purging is used to prevent the formation of an explosive mixture inside the equipment when feeding the reactor. Vacuuming is done to save nitrogen and reduce compression costs.
Since air remains in the system after the installation is completed or during maintenance, pure nitrogen with a purity of >99.8% (mole%) must be introduced first for purging before hydrogen is introduced into the system. Evacuating the system before introducing nitrogen can help reduce the amount of nitrogen required.
Flammable and explosive gases all need to be displaced with the inert gas nitrogen to prevent explosions
Replacing with nitrogen is done to prevent the formation of explosive mixtures, and evacuating creates better conditions for replacing it with nitrogen!
Performing vacuum pumping before system displacement can save nitrogen usage, while vacuum testing is carried out on the system to check its airtightness
Answer: Since air remains in the system after the installation is completed or during maintenance, pure nitrogen with a purity of >99.8% (mole%) must be introduced first for purging before hydrogen is introduced into the system. Applying vacuum before the nitrogen purging process can help reduce the amount of nitrogen required.
Since air remains in the system after the installation is completed or during maintenance, pure nitrogen with a purity of >99.8% (mole%) must be introduced first for purging before hydrogen is introduced into the system. Evacuating the system before introducing nitrogen can help reduce the amount of nitrogen required.
Since air remains in the system after the installation is completed or during maintenance, pure nitrogen with a purity of >99.9% (mole%) must be introduced first for purging before hydrogen is introduced for operation. Evacuating the system before introducing nitrogen can help reduce the amount of nitrogen required. After replacement, it is considered qualified only when the oxygen content in all samples is <0.5% (v).