The flow rate in the steam pipeline won’t increase
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This post was last edited by Engineering-Rebel on 2017-9-6 at 20:21. Hello everyone: I’ve run into a problem and hope you can help me. Currently, I have a raw steam pipe that, after passing through a heat exchanger, turns into condensate. The raw steam entering the system is at a pressure of 0.7 MPa; the pipe used is DN80. After going through a pressure reducing valve, the pressure drops to 0.5 MPa before the steam enters the heat exchanger. The output from the heat exchanger is steam condensate, and the corresponding pipe is DN32. At present, the maximum steam flow rate I can achieve is only 0.6 tons per hour. The bypass valve for the condensate drain valve has been opened, so there’s no issue with condensate not being able to drain out. But why can’t the steam flow rate be increased? I would appreciate some advice from experts – could it be due to the steam pressure relief valve? The valve opening is too small
The pipe has been in use for too long, it’s corroded and blocked, I guess
It might be the DN32 pipe, as well as an insufficient heat exchange area of the heat exchanger.
It’s probably not a problem with the pressure reducing valve; this valve is able to keep the pressure stable at 5 kilograms downstream, and it has fulfilled its purpose. I don’t know what the back pressure behind the check valve is in the question’s scenario; it’s possible that the back pressure in the condensate pipe is too high, or there might be an obstruction at the 32mm pipe connection