Is it necessary to install safety valves on both the acidic water stripping tower and the overhead reflux tank?
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What we have now is that safety valves are installed only at the top of the acidic water stripping tower. Obviously, the height of the reflux tank is lower than that of the tower top, and the pipes leading into the reflux tank extend inside it, below the liquid level. Previously, when looking at model 20570, it was mentioned that if the outlet valve of the reflux tank were to close accidentally, gas could start to accumulate in the tank; as pressure increased, this would force the liquid in the tank upward, into the pipes leading to the tower top. This would result in the pressure inside the reflux tank being higher than that at the tower top. If safety valves are installed only at the tower top, they won’t be able to protect the reflux tank. I wonder what everyone thinks – is it necessary to install safety valves in both locations? O(∩_∩)O Thank you
We also only have it at the top of the tower; there is no acid water return tank. From an operational perspective, it is difficult for both the wastewater stripping tower and the amine liquid regeneration tower to experience overpressure; reducing the steam at the bottom of the tower will lower the pressure at the top of the tower. But we have a special case: our acid water tanks are designed for high pressure, having been modified from other types of tanks.
We also only have it at the top of the tower; there is no acid water return tank. From an operational perspective, it is difficult for both the wastewater stripping tower and the amine liquid regeneration tower to experience overpressure; reducing the steam at the bottom of the tower will lower the pressure at the top of the tower. But we have a special case: our acid water tanks are designed for high pressure, having been modified from other types of tanks.
There are regulations regarding whether a safety valve should be installed in the reflux tank. If there is a isolation valve between the tower and the reflux tank, it is advisable to install a safety valve in the reflux tank as well. In the absence of such an isolation valve, that is, when the tower and the tank are connected and allow fluid flow, a safety valve is sufficient to be installed at the top of the tower. When determining the discharge capacity of the safety valve, the full capacity should be taken into account.
So, do you think a situation like the one I described could actually exist, buddy?
If the outlet valve closes by mistake and the steam to the bottom of the tower isn’t stopped, then an accident is very likely to occur. Although there are various temperature interlock controls in place, it’s always better to consider everything thoroughly when planning
Personally, I think it depends on whether there is a separation between the tower top and the reflux tank. To achieve such separation, it is recommended to install safety valves. If there are only air coolers or other cooling devices between the pipeline and the reflux tank, with no valves, it may not be necessary to add any additional valves. As for why closing the valve used for drawing liquid from the bottom of the tower leads to an increase in pressure in the reflux tank, that’s a question worth considering Also, the pressure in the reflux tank can be controlled; it should have pressure supply and release valves, otherwise how can you control the pressure in your stripping tower? It still depends on how the detailed design is carried out; there are regulations regarding this. For safety reasons, a safety valve can be added, after all, the return tank is also a pressure vessel.
Personally, I believe the source of pressure in the reflux tank is the tower top; therefore, even if the outlet of the reflux tank is blocked, the pressure in the reflux tank should not be higher than that at the tower top. Therefore, providing overpressure protection at the top of the tower is sufficient to meet the requirements.
They should all be available; these are safety accessories for pressure vessels