Water hammer in condensate pipelines
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Water hammer in the condensate pipeline passes through our system, but since we transmit the water externally, the water hammer is quite significant; there is water hammer over a distance of roughly 300 meters from start to end； How do I get rid of this thing?
Add condensate recovery facilities: The condensate is fed into a flash drum; the flash steam is vented or directed to a low-pressure pipeline network (such as a 0.4 MPa steam network). The condensate at the bottom of the drum is pumped to increase its pressure, then cooled to 60–80°C in a cooler before being discharged externally. This prevents water hammer from occurring.
In the case of water hammer in the system piping, it’s very likely that there is steam present throughout the entire condensate system pipeline； In the event of water hammer at the junction where the condensate exits the unit and enters the system pipeline, one possibility is that the condensate in the system pipeline contains vapor; since the temperature of the condensate coming out of the unit is low, it fails to mix with the system’s condensate. Another possibility is that the trap within your unit isn’t functioning properly, causing the condensate exiting the unit to be excessively hot, which then leads to water hammer at the system junction
It’s because the return water temperature is too high and contains steam, which causes water hammer; some way needs to be found to lower the temperature
Indeed, we still need to have them lower the temperature
Currently, the condensate pipe network I designed is also experiencing water hammer, and the client keeps asking me to figure out the cause. A sad person. On my end, there’s an open-type condensate recovery system. The temperature of the returned condensate is generally below 100°C. The entire system is quite simple: after using steam, each steam-using unit directs the condensate into its own open condensate tank, from which it is then pumped back to the boiler room via condensate pumps. Water hammer occurred after the drain from behind the steam trap along the pipeline was directed into the condensate pipe. Apart from air leakage from the steam trap, I can’t find any other cause. There’s a bit too much water at the drain points throughout the piping network; however, according to on-site feedback, replacing the drain valves didn’t help. I can’t find a good way.
Just add a condensate flash drum; it can also produce low-pressure steam as a by-product