I have a question regarding the pump installation height – \"backflow\"”
Thread Content
“The problem of \"backflow\" is described in the book as follows: the pump is installed below the liquid level of the distillation tower, and it is used to send the liquid that is boiling in the distillation tower to a storage tank. However, in the book the storage tank is already located at a lower level than the distillation tower; so wouldn’t gravity flow suffice in that case? Isn’t the pump unnecessary? Or it might just be a simple diagram in the book; the storage tank could be above the distillation tower, in which case the pump is still needed, and it will have to operate in reverse flow. Also, I would like to ask if this situation occurs in actual production? I study environmental science, and I usually don’t encounter such situations
There is always a check valve at the pump outlet; it remains closed when the outlet is not in use. Once the pump starts operating and the pressure reaches normal levels, the outlet valve is opened slowly. These factors are certainly taken into account during the design of the pump’s head.
What on earth are they talking about? ? ? ?