How is the setting pressure for the safety valve of the synthesis tower drum determined?
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The deoxygenated water supplied to the drum is at 6.0 MPa, the drum pressure is 3.2 MPa, and steam with a pressure of 2.85 MPa is produced; however, the setting pressure of the safety valve is 5.8 MPa. Why is that?
I am involved in the design of safety valves, which under normal conditions will activate only when the set pressure is reached.
Generally, the pressure limits are set based on a comprehensive consideration of the process system design, and they are not necessarily aimed at the steam drum. It’s not easy to guess
5.8mpa; it seems I overcomplicated things before
The setting pressure of the safety valve should be 1.1 times the design pressure!
The operating pressure is 3.2; why is the design pressure set so high? It’s not that it’s impossible to do so, but from an economic perspective, isn’t it too wasteful?
During takeoff, the pressure does not exceed the design pressure of the equipment.
The launch pressure must not be higher than the designed pressure; otherwise, there will be no protective effect.