【Daily Question 2019】Hydrogen production and hydrogenation section – Question No. 001
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This post was last edited by Green Lotus on 1/1/2019 at 15:10. [Daily Question 2019] Hydrogen production and hydrogenation section – Question No. 001: Why does the feed oil need to be filtered? New Year easy questions – no fixed answers; any reasonable response is acceptable. Due to the various impurities, coke particles present in the raw materials (especially reprocessed diesel), as well as rust resulting from corrosion of the system pipelines, these substances can cause scaling or blockages in the heat exchangers and other equipment once they enter the plant. This leads to an increase in pressure drops across the equipment and a reduction in the efficiency of heat exchange by the heat exchangers ； On the other hand, it also contaminates the catalyst, increases the pressure drop in the bed, and reduces the catalyst’s activity. It can be seen that impurities in the crude oil will shorten the operating cycle of the unit, and it must be filtered before being fed into the unit. (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
Due to the various impurities, coke powder, and components present in the raw materials (especially reprocessed diesel),
Filter out mechanical impurities, gums, coke, and other substances in oil that can clog pipes and affect the catalysts – wish you a safe New Year!
The raw materials contain various impurities, coke dust, as well as rust resulting from corrosion in the system pipelines. Once they enter the equipment, they can cause scaling or blockages in heat exchangers and other devices, increasing the pressure drop across these devices and reducing their heat exchange efficiency； On the other hand, it also contaminates the catalyst, increases the pressure drop in the bed, and reduces the catalyst’s activity.
Filter out the larger particles in the feedstock to prevent clogging of the catalyst bed and excessive pressure drop in the reactor
Because the raw materials (especially reprocessed diesel) contain various impurities
Due to the presence of various impurities and coke dust in the raw materials
Answer: Since the raw material contains various impurities and coke dust, once it enters the plant, it can cause scaling and blockage in heat exchangers or other equipment, increasing the pressure on these devices and reducing their heat exchange efficiency. More importantly, it can contaminate the catalysts or cause them to scale or coking, thereby reducing their activity (and increasing the pressure drop across the catalyst bed), which shortens the operational cycle. Therefore, the raw material must be filtered before it is fed into the plant.
Due to the various impurities, coke particles present in the raw materials (especially reprocessed diesel), as well as rust resulting from corrosion of the system pipelines, these substances can cause scaling or blockages in the heat exchangers and other equipment once they enter the plant. This leads to an increase in pressure drops across the equipment and a reduction in the efficiency of heat exchange by the heat exchangers； On the other hand, it also contaminates the catalyst, increases the pressure drop in the bed, and reduces the catalyst’s activity. It can be seen that impurities in the crude oil will shorten the startup cycle of the unit, and it must be filtered before being fed into the unit.
Filter out the larger particulate impurities in the raw material to prevent clogging of the catalyst bed and excessive pressure drop in the reactor.
Due to the various impurities, coking powder present in the raw materials (especially reprocessed diesel), as well as rust resulting from corrosion of the system pipelines, these substances can cause scaling or blockages in the heat exchangers and other equipment once they enter the plant, thereby increasing pressure losses. Additionally, they can lead to the formation of a crust inside the reactors.