The function of the bypass in the desulfurization tower of hydrocracking (high-pressure amine absorption tower)
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Let’s discuss the function of the bypass in the desulfurization tower. The main function. Question of the day.
To regulate the hydrogen sulfide concentration in the circulating hydrogen, we generally keep it at 500–1000 PPM. If hydrogen sulfide is controlled solely by adjusting the flow rate of the amine solution entering the tower, this is not conducive to the long-term operation of the high-pressure pump.
What you say makes sense as well, but it doesn’t seem to be the most important factor. Thank you.
Oh, if there’s a good explanation, please tell me too so I can learn from it.
1. Regulate the hydrogen sulfide content in the recycled hydrogen; 2. Prevent excessive gas flow from causing the trays to be overturned during emergency venting; 3. Control the gas flow entering the tower to avoid liquid being carried along with the recycled hydrogen
(1) Adjust the hydrogen sulfide content in the circulating hydrogen; (2) Prevent excessive gas flow during emergency venting from causing the trays to be overturned or the floating valves to fall off; (3) When the ammonia liquid foams, prevent the circulating hydrogen from carrying liquid, and it is necessary to modify the cross-line of the desulfurization tower.
Control the hydrogen sulfide concentration in the circulating hydrogen; too low a concentration poses a risk of catalyst reduction. The desulfurization tower bypass is generally used for pre-vulcanization before starting up, for processing low-sulfur oil, or in special emergency situations, right?