0.7MPa emergency pressure relief
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The emergency pressure relief levels for hydrogenation systems are generally 0.7 MPa and 2.1 MPa. How do people determine which level to use? Under what conditions is 0.7 MPa chosen, and under what conditions is 2.1 MPa used? There are also devices that do not have a pressure of 2.1 MPa; can someone explain this? Also, where do the values of 0.7 and 2.1 come from, and why are these the only two options?
In some places, there are also versions with a value of 1.4, which offer more options regarding the desired pressure release speed~~~ This is likely related to the pressure designed for your system, that is, to the severity of potential accidents~~~
In the event of an emergency in normal units, a value of 0.7 is chosen; the new hydrogen generator, feed pump, and heating furnace will all shut down via interlock, while the cycle hydrogen compressor continues to operate to ensure that the hot hydrogen carrying oil is delivered to the distillation unit.