What principles should guide the design of the water seal tank on top of large storage tanks?
Thread Content
This post was last edited by longkui1990 on 2015-12-15 at 15:24. For example, depending on the amount of gas generated during flash evaporation in a large tank, what size of water seal tank is required? What are the specific principles behind this? I would appreciate it if someone could give me some guidance. O(∩_∩)O Thank you
Haven’t seen the principle. But my consideration is, first, to what extent can the pressure be reduced when breaking through the water seal – this should depend on how much water can remain outside the water seal partition And the issue of the drainage capacity of the outlet pipe. Second is how long it takes to re-establish the water seal; this should be related to the amount of water supplied.
That makes sense. Have you come across any similar articles or references that can be quantified?
This post was last edited by ylb913 on 2015-12-15 at 20:29. I’ve never seen it; I’ve also been trying to find out the design concepts behind such seal tanks. Last year, I discussed this issue separately with the design unit at our factory and the head of the technical department; the overall concept was correct, but the specifics were unclear. It’s all over at the design institute – everyone just copies drawings. It’s hard to explain clearly. The concepts I discussed with the head of the technical department and our plant’s deputy chief engineer are more or less in line, but there are no specific details. ——The key is our water-sealing tank: when it bursts out, it’s like a wave that shoots forward and then returns; there is very little space left for storing water outside the partition. ——It depends on the amount of air present. If a large volume of air arrives suddenly, it should be allowed to reach zero in one go; the water sprayed out must prevent that air from returning. Abnormal situations must be taken into consideration.
What does it mean to break through to 0 in one go?
I have seen a situation where the pressure dropped to 0 (the pressure in the tank), or came very close to zero. The drawings for the water seal tank from that time are no longer available, but I think this approach is more reasonable – there is plenty of space outside the partition, enough to temporarily store the water that is discharged at the moment the water seal is broken. But recently, due to an update of the water seal tank, the drawings from about ten years ago that were found were completely different – there was very little space outside the partition, and the design institute couldn’t explain why. But since 1998, we have accumulated considerable experience in handling such matters, so dealing with them now is relatively simple. This isn’t something that just a few people need to understand; rather, everyone should be clear about how to assess and deal with them.
It seems very difficult to find a unified standard. .