Causes of water hammer in the condensate line
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Background: The three units share the same condensate discharge system; the temperatures at the condensate discharge points of each unit are different, and a steam trap is installed at each discharge point. What is discharged from the downstream drain valve behind the demister is mainly liquid phase. Water hammer phenomena persist along the condensate line. Question: Where does water hammer come from? I would like to ask the experts out there. . .
The phenomenon you mentioned could be caused by three reasons: first, a failure in one of the steam traps allows a small amount of steam to enter the condensate main, resulting in liquid slugging in the pipes； Secondly, there is a significant pressure difference in the condensate pressures from the three streams that flow into the main condensate pipe; this results in large variations in liquid pressure near the junction points, thereby causing water hammer ； Third, there is a control valve on the main condensate pipe; if this control valve is often opened and closed fully, it can also cause water hammer.
The volume is small and the temperature is high, which results in a decrease in pressure as the fluid enters the pipeline; steam is generated, leading to water hammer. The idea is to lower the temperature further, or to reduce the valve opening at the end of the pipeline in order to build up some pressure
The pressure is different, the water in the pipe is not at full level, resulting in flashing. The operation of the trap releases some steam; the pressure behind the trap varies, resulting in differences in pressure levels along the pipeline. In some areas the pipeline is not fully filled with fluid, which leads to flashing and ultimately to water hammer.
Is it directly connected to the common drain pipeline behind the steam trap? In that case, it is not certain whether the water behind each check valve comes from that specific point or from some other source. If the temperature difference isn’t significant, there should be no problem. Water hammer has always been present; is it frequent? Is the sound loud?
How much is the pressure difference across the three tapping points? Do the pipes and points have any diameter changes?
After the trap is the condensate drain, right? The drain from the trap will contain some steam
After the trap is the condensate drain, right? The drain from the trap will contain some steam
Personally, I think what was said on the 4th floor is quite comprehensive
Three streams of condensate water, caused by a large temperature difference