Which points are generally considered as the high-pressure to low-pressure junctions in hydrogenation?
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Which points are generally considered as the high-pressure to low-pressure junctions in hydrogenation?
High-temperature high-score strings with low-temperature high-score strings, low-temperature high-score strings with low-temperature low-score strings, and cyclic hydrogen desulfurization towers in series with regeneration towers
Addition: From the low-pressure section to the fractionation section, liquid is removed from the booster pump’s liquid separation tank, and also from the liquid separation tank at the inlet of the circulation pump
High-pressure stream to low-pressure stream; the recycle hydrogen desulfurization tower is connected to the rich liquid flash tank; the outlet of the hydrogenation feed pump is connected to its inlet; the outlet of the makeup water pump is connected to its inlet; the outlet of the new hydrogen compressor is connected to its inlet; the outlet of the recycle hydrogen compressor is connected to its inlet; low-pressure stream to distillation tower; the outlet of the lean liquid pump is connected to its inlet, etc.
From cold high scores to cold low scores, from hot high scores to hot low scores. Cyclic hydrogen desulfurization tower to rich liquid flash tank. There was once a malfunction in the liquid level control of the circulating hydrogen desulfurization tower, which resulted in an empty tower; circulating hydrogen then rushed into the rich liquid flash tank. Fortunately, only the tank’s safety valve activated, but it was still a very frightening experience.
Additional note: Transfer the acidic water from the high and low pressure recovery tanks to the sulfur-containing wastewater flash tank
Additional note: High and low pressure heat exchangers, at the liquid separation control valve of the circulating hydrogen pressure inlet tank!
The liquid drainage from the hydrogen inlet separator tank is directed to the flare line; generally, there’s no concern regarding pressure cross-over. No problems have occurred in that area over the years. A dedicated person is responsible for shutting off the water supply, and the operation takes less than 3 minutes each time – the manual valve is closed once the task is completed. This approach is relatively safer~~~~
This post was last edited by libingtaoff8 on 2017-1-18 at 16:47. Our design involves diverting the liquid from the liquid separation tank in front of the desulfurization tower to the low-pressure system, and sending the liquid from the liquid separation tank at the compressor inlet to the waste amine tank. The waste amine tank is connected to the low-pressure system; the pipes used are relatively small, with a diameter of around DN25. If the liquid diversion is not proper or if there are issues with the system, it is very likely that high pressure will be transmitted to the low-pressure system. .