Predictive Accuracy of Design Methods for the Relief Cross-Sections on Chemical Reactors in the Case of Two-Phase Flow Discharge

摘要

For the calculation of the minimum relief corss-section of rupture discs or safety valves on chemical reactors, several so-called simplified methods are described in the literature. An essential feature of these methods is that during relief only a critical two-phase flow consisting of a gas and liquid is assumed. The design criterion is the allowable pressure in the reactor after the opening of the relief device. The discharged total mass flow rate and the comosition of the two-phase flow in the relief device then are predefined.