Regarding the head of a salt water pump
Thread Content
This post was last edited by sunjl1981 on 2013-1-6 at 21:50. For our company’s 60,000 tons per year ion-exchange membrane caustic soda production project, the brine used is processed using the Kaimo membrane technology; the design team specified that the head pressure required for the brine pump should be 50 meters. I think there’s something wrong, as the pressurized dissolved air tank is located at +20.0m. The normal operating pressure for such a tank is 0.2–0.3 MPa; taking the pipeline losses into account, I believe the head pressure provided by the primary brine pump isn’t sufficient. What do you all think? Could you please share the head pressure values of the primary brine pumps you use? Thank you! # hcbbs
It depends on the height difference between the pressurized dissolved air tank and the pump; if it is within 20 meters and there are not many pipe bends, then there should be no problem. It’s possible to do some calculations to determine this.
There is indeed a problem: a head of 50m can be simply converted to 0.5 MPa; after subtracting the 20m height, only 30m remains. The operating pressure range is 0.2 to 0.3 MPa, which presents some issues. The pressure pump we use (to transfer the material from the front reaction tank to the pressurized dissolved air tank) has a head of 64m
The head of the pressure pump here is 60.
Usually, attention needs to be paid to factors such as pipeline resistance (related to fittings, pipeline length, etc.) and brine density.
Our production capacity is 100,000 tons per year; the pump head is 65 meters, and the pressure in the pressure vessel is controlled at 0.2~0.25 Mpa
The poster needs to understand one thing: the head of a pump actually includes both the suction head and the discharge head. The pressure at the inlet of the salt water pump needs to be taken into consideration; if the pump inlet is a storage tank, then a head of 50 meters is generally sufficient. If the pump inlet is at a sump, a head of 50 meters is a bit challenging. What the people upstairs said is all correct; a pump with a head of over 60 meters should be selected, otherwise the flow rate will be significantly reduced.
Thank you all. Our company deals with salt processing underground, and the inlet of the primary salt water pump is located in an underground tank. It seems the pump’s head is a bit low.