Gas entrainment problem in the primary circulation liquid pump of the pyrolysis gasoline hydrogenation unit

2018-07-02View Original

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In my workshop, it is a high-temperature separation type canned pump used as the reverse circulation liquid pump for the gasoline hydrogenation unit. I’ve always found it puzzling that air can be discharged from the high point of the rear bearing at regular intervals when the pump is stopped. But the principle seems to make sense; when hydrogen and gasoline are mixed and sent into the pumping process, some of it should also vaporize. However, once air enters the low-temperature chamber of such a high-temperature separation type shielded pump, it will inevitably cause abnormal circulation of the circulating fluid, leading to abnormal heating of the bearings. I wonder if other gasoline hydrogenation units also have such problems, specifically with the counter-current liquid pump.

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Gas entrainment problem in the primary circulation liquid pump of the pyrolysis gasoline hydrogenation unit

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