Regarding the safe discharge volume of high-pressure gas into low pressure in case of rupture of heat exchange tubes

2009-03-31View Original

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I would like to ask about the calculation of the safe discharge volume when gas from the high-pressure side of a waste heat boiler enters the low-pressure side. According to the methods outlined in the Petrochemical Design Manual, this is calculated using an acute-angle orifice plate; however, the results show that as the pressure behind the plate increases, the discharge volume also increases, which seems to go against common principles. I’m not sure if it’s because I haven’t understood it thoroughly; could someone please give me some guidance? Also, does D in the formula refer to the diameter of the waste heat exchanger? (The inlet of this waste heat exchanger is the outlet gas from the ammonia synthesis process, with a pressure of 24 MPa, and the shell-side pressure is 2.5 MPa.)

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Regarding the safe discharge volume of high-pressure gas into low pressure in case of rupture of heat exchange tubes

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