Reaction pressure
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Gentlemen, how is the reaction pressure controlled in a gasoline hydroprocessing unit? Please share! Our device is controlled by the reactor outlet flow rate!
It is controlled by the amount of new hydrogen added
The flow rate at the reaction outlet controls the circulation volume; the system pressure is primarily regulated by the addition of fresh hydrogen and the removal of waste hydrogen. There are other factors such as temperature rise and space velocity as well, which affect pressure but are not adjusted for the purpose of controlling it
Under normal production conditions, it is controlled by the amount of fresh hydrogen supplied to the system; if the pressure is low, more hydrogen is supplied, while if the pressure is high, some of the hydrogen is returned； There are many methods for dealing with abnormal situations: various means such as waste hydrogen discharge valves, emergency pressure relief valves, and safety valves can be used.
The pressure in the first reactor of our unit is also controlled by the outlet flow rate, as it involves full-liquid-phase hydrogenation; the second and third reactors are controlled by the supply of fresh hydrogen and the removal of waste hydrogen, with variations depending on the specific conditions of each unit