Seeking advice on the distance l of the transfer pump
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This post was last edited by chenshuyanming on 2015-7-15 at 11:22. I’m seeking help from everyone** – our factory has a 45% caustic soda pump that is used to supply material to another unit. The pump’s flow rate is 80 m3/H and its head is 95 meters. The pipeline runs through a duct that is 10 meters high, and it is DN100 in diameter. There are approximately 15 bends in this pipeline, with no valves installed. How far can the liquid be transported? (The end point is a small tank with a capacity of 200 m3.) Please let me know how to calculate this. Thank you, density 1.5
Here’s a suggestion: the pump you’re referring to is likely a centrifugal pump. The pressure generated by the maximum liquid level in the small storage tank, along with the pressure drop caused by resistance in the pipelines along the way, includes a value of 10 meters; this allows for the determination of the outlet pressure required by the pump. The appropriate flow rate and pressure can be found on the pump’s performance curve (the power factor also needs to be taken into consideration).
The high pressure in the pipe tray, the frictional loss in the pipes, and the pressure requirements at the inlet to the tank; elbows are calculated based on 30 meters of pipe length.
Convert the elbow length into that of a straight pipe; based on the diameter of the flow pipe, it is possible to determine the pressure loss per 100 meters of straight pipe. After subtracting the pressure drop caused by the height difference of 10 meters, if the remaining head of 85 meters is greater than the pressure loss, then fluid can be transported through the system. Leave some margin. Based on a resistance loss of 75 meters, the length of straight pipe required to generate such a loss is essentially the maximum possible length for the pipeline. Based on the actual piping layout, removing the vertical pipe length essentially gives the maximum transmission distance! The resistance loss in straight pipes is available in tables. Density has no impact; it depends on the viscosity level! If it’s small, it can be ignored! If it’s large, a head conversion is required!
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