Seeking advice on replenishing the working fluid in a 2BV5 type liquid ring pump
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This post was last edited by whweimy on 2017-6-9 22:31. Hello, everyone in this forum! Good evening! The projects I have been working on recently have involved the use of 2BV5 type liquid ring pumps, with a steam-water separator installed at the exhaust port. I have a few questions for everyone: a. As shown in the 3D schematic in Figure 1, does the additional working fluid, after entering the pump, pass through the baffle together with the suction gas into the vacuum area of the impeller? b. As shown in the connection pipe of the soda separator in Figure 2, under normal operating conditions, is it possible that additional working fluid enters through port 20 but fails to reach the pump, instead flowing along a shortcut and being discharged directly through port 21? I hope everyone can give me some guidance; I thank you all here:handshake
No, the water in a water ring vacuum pump is used to form the water ring. In theory, the vacuum pump should discharge air each time it compresses, but in practice, various factors cause water to be carried out along with the air when it is discharged. And what you mentioned – going directly from 20 to 21 – is even less possible, because the water that reaches level 20 doesn’t have much kinetic energy; its only option is to continue forming a water ring, and then be thrown to level 21 by the centrifugal force of the pump
This post was last edited by whweimy on 2017-6-12 at 20:32. Thank you for your answer. I have another question: currently, the working fluid at port 20 is pumped in by the circulation water pump, while it is discharged below the liquid level of the open-type seal tank at port 21. Is it possible that, while the pump is running, the working fluid cannot be discharged from port 21, and instead the working fluid in the discharge pipeline is drawn back into port 21? I would appreciate your further guidance. Thank you.
No, the pressure at outlet 21 is always positive, while the pressure at inlet 20 is always negative. The pressures at these two points ensure that the problem you’re worried about won’t occur. Even if some of the water from 21 flows back, it doesn’t matter as long as it doesn’t affect functionality