Is it necessary to install a safety valve at the top of an atmospheric distillation column?
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As stated in the title: According to Clause 5.7.1 of the detailed regulations, safety valves must be installed in the vapor lines at the top of the distillation tower where overpressure can occur due to a disruption in the cooling water or return flow, or as a result of excessive heat input to the reboiler. Is everyone setting it?
As required by clause 5.7.1, to prevent overpressure caused by a disruption in the cooling water or return flow, or by overheating of the reboiler, safety valves should be installed on the vapor lines at the top of the distillation tower. This is a standard security measure that is usually followed and implemented. .
In some provinces, it is required to be installed.
Article 5.5.1 of GB 50160 also stipulates that \"distillation towers, evaporation towers, and stripping towers with an operating pressure at the top greater than 0.03 MPa shall be equipped with reliable safety pressure relief measures.\" But I think a HAZOP analysis should be conducted based on risks; if it can be ensured that the risk associated with the reboiler providing excessive heat in the event of refrigerant failure can be reduced to an acceptable level through other IPLs, then it is not necessary to include it, otherwise it is required.
Check whether the system remains active continuously; if it stays active without any obstacles, it is considered unnecessary
Check whether the system remains active continuously; if it stays active without any obstacles, it is considered unnecessary
The gas flow rate when the system is operating continuously should differ significantly from the gas flow rate when there is no refrigerant present; such a high flow rate entering the subsequent system will inevitably lead to an increase in pressure