condensate pump noise
condensate pump noise
(OP)
we have a LP condensate flash drum. The flashed steam passes through fin fan cooler, and return of fin fan cooler goes back in the drum. The return line is submerged in the tank below the normal level. Pressure in the drum is maintained by venting in the atmosphere or putting nitrogen in the fin fan outlet line (split range control valves).The condensate pump makes a lots of noise. Is it possible that N2 is entrained in the liquid and going to pump. what may be the possible reasons for the pump noise? cavitation, Gas entrainment, recirculation? Is it ok with fin fan outlet line submerged in the liquid?





RE: condensate pump noise
RE: condensate pump noise
NPSHR=3.5m
RE: condensate pump noise
RE: condensate pump noise
Best Regards
Qalander(Chem)
RE: condensate pump noise
rmw
RE: condensate pump noise
RE: condensate pump noise
may be susceptible to leakages;
consequently some leaked steam might agitate the condensate/ get trapped and cause the "Pump in question's vapor/gas locking" thus noise.
Best Regards
Qalander(Chem)
RE: condensate pump noise
RE: condensate pump noise
Additionally the incoming pipeline may be so positioned below the liquid surface as stirring and agitation gets minimized;
may be a baffle plate slanted 45 degrees to receive the direct inlet material(if installable in earliest opportunity may prove useful).
Other learned colleagues may correct/guide better.
Best Regards
Qalander(Chem)
RE: condensate pump noise
2) Can you try with following suggestion
-Trottle pump discharge
-Spray water at your drum to gain sub cool liquid.
-check pump vent line already release before pump start. if in doubt, just stop the pump for a while then venting all line to clear vapor lock.
-If pump has minimum flow line try to operate in manual to check if noise still generate in diffrent flow.
RE: condensate pump noise
RE: condensate pump noise
RE: condensate pump noise
Also, what pressure range do you have for the split range control on N2 and vent? A large pressure swing could cause vapor bubbles to form in the pump suction.
RE: condensate pump noise
RE: condensate pump noise
RE: condensate pump noise
RE: condensate pump noise
Try running the drum level as high as possible, and if using a fixed rate minflow (spillback via orifice) try an alternative minflow protection to minimizes suction line velocity.
best wishes,
sshep
RE: condensate pump noise
Pressure at the Pump Suction is 0-1.6kg/cm2 @ 109oC
0???!!! Definitely an NPSH problem
RE: condensate pump noise
Best Regards
Qalander(Chem)
RE: condensate pump noise
RE: condensate pump noise
More over pump discharge flow is 45 m3/h. pump has a suction reducer of 8"*3". so suction vel in 8" line is 1.27 ft/sec and in 3" reducer 8.58 ft/sec.
RE: condensate pump noise