[Q&A Question 188] 2018.07.12
Thread Content
【Q&A Question 188】July 12, 2018: Briefly describe the hazards of a short circuit (bypass) in the crude oil filter (backwash filter) ①The function of the crude oil filter is to remove particulate impurities from the oil; this is especially important for devices that process oil further, as such oils contain a high amount of particulate impurities ； ②When the feed oil filter shorts out, the feed oil will coking in the high-pressure heat exchanger, blocking it and reducing the heat exchange efficiency ； ③Furthermore, once particulate impurities enter the reactor, they will deposit within the bed layer, increasing the reactor pressure drop ； ④To ensure the stable and efficient operation of the device, it is necessary to prevent short circuits in the crude oil filter. (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. The APP short-video skill competition has started! https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=1951670
Carbon deposition in the first bed of the reactor, resulting in an increase in pressure drop
①The function of the crude oil filter is to remove particulate impurities from the oil
The resistance of the catalytic bed increases, leading to catalyst poisoning.
Dangers of a short circuit (bypass) in the crude oil filter (backwash filter): ① The function of the crude oil filter is to remove particulate impurities from the oil; this is especially important for devices that process oil further, as such oils contain many particulate impurities； ②When the feed oil filter shorts out, the feed oil will coking in the high-pressure heat exchanger, blocking it and reducing the heat exchange efficiency ； ③Furthermore, once particulate impurities enter the reactor, they will deposit within the bed layer, increasing the reactor pressure drop ； ④To ensure the stable and efficient operation of the device, it is necessary to prevent short circuits in the crude oil filter.
If a detour is taken for a long time, impurities in the raw materials along with their metals will be carried into the reactor. Over time, coking will form at the top of the reactor, causing an increase in the pressure difference within the reactor, which affects the long-term operation of the facility ； Moreover, introducing metal can also cause catalyst metal poisoning and shorten the catalyst’s service life
①The function of the crude oil filter is to remove particulate impurities from the oil
The function of the crude oil filter is to remove particulate impurities from the oil
If a detour is taken for a long time, impurities in the raw materials along with their metals will be carried into the reactor. Over time, coking will form at the top of the reactor, causing an increase in the pressure difference within the reactor, which affects the long-term operation of the facility ； Moreover, introducing metal can also cause catalyst metal poisoning and shorten the catalyst’s service life
Carbon deposition occurs in the first bed of the reactor, causing an increase in pressure drop.
The reactor bed becomes clogged, causing the pressure drop to increase rapidly.