Question regarding the drain outlet of storage tanks
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Hello everyone. I am a technician from a water separator manufacturer, and I would like to ask you: how many different types are there for the drainage outlets connected to storage tanks and water separators? This one is of the siphon type; such drainage outlets require water separators that also have an oil return function, and I am aware of that. I would like to ask everyone: are all the drainage outlets for connecting water cutters to storage tanks of this siphonic type? Is there anything like this below? A or B, thank you
If you’re not familiar with the water cutter, just set it according to the positions indicated in the diagram; usually, these positions involve the use of elbows, and such setup helps to reduce the deposition of impurities in the liquid that is carried away. The following two are also set according to actual needs. They all exist; they are just suitable for different needs. Oh, and the siphon you mentioned seems to not be relevant, right?
Thank you. If the drain pipe has elbows, after the water is cut off, oil will accumulate at those elbows; therefore, a oil return device is needed, and the storage tank should be equipped with an oil return port.
If it’s difficult to drain through port A, it’s better to choose B.
This post was last edited by qqsbig001 on 2019-8-18 at 16:47. I only had a brief overview of it; I didn’t delve into it in depth. I merely heard the guide mention this issue on site: Effect A is not as good as that in Figure 10. How does B achieve oil return without any oil remaining in the curves?
Oh, it seems I understand how it works. Could we consider installing a detection post at an appropriate location? Could we adopt a more comprehensive and broader perspective, such as regarding feed, flow rate, pressure, and other aspects? It’s not for this position – there’s too little information. It would be best to provide an overall schematic diagram to explain the goal that needs to be achieved. Looking forward to it.
The low-point drain outlets for storage tanks that I have seen are almost all of type B; this design makes it easy to drain completely.
In actual design, the B format is more common and is used for waste discharge, as shown in the figure
Figure 10: Does a elbow require a pump or something to draw liquid out? Otherwise, the liquid below the interface height won’t be discharged automatically, right?
The purposes of sewage discharge and water drainage are different; it is normal for their structures to vary