Selection of feed pump
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The fluid is hydrocracking tail oil, with a rated flow rate of 25 cubic meters per hour; the pressure needs to be increased from 0.2 Mpa to 18.0 Mpa, and the inlet temperature is 95 degrees. Should a high-pressure plunger pump be used? High-speed pump? Or a multi-stage centrifugal pump? Please share your valuable suggestions.
If you need higher pressure, it’s better to choose a high-speed pump. High-speed pumps can generally meet a flow rate of 5–100 m3/h, a head of 150–1500 m, and a rotational speed of 8000–16000 r/min.
High-speed pumps are characterized by low flow rate and high head. It can just meet your requirements of low flow rate and high head. The best option is to use a multi-stage centrifugal pump; such pumps have a very small impeller diameter, narrow flow channels, high flow velocities, and produce significant noise due to erosion, which is not desirable
However, based on research and the main opinions of the design institute, a high-pressure plunger pump is the preferred choice; high-speed pumps and multi-stage centrifugal pumps have high motor power consumption, low efficiency, and sometimes a high failure rate as well.
For low flow rates and high pressure differences, high-speed pumps are recommended! Simple and convenient. Multi-stage centrifugal pumps are rather troublesome, with a high maintenance rate
It is better to choose a multi-stage centrifugal pump, as it has low costs, is easy to operate, and requires low maintenance costs.