Abstract:

Emergencypressure reliefsystem isthe primary means of protecting units, and the accurate calculation ofits relief rate is very important forproduction safety and flare system design. Takingthe pressure relief of LPG separation system in fire case as an example,a modelwas establishedvia HYSYS BLOWDOWN Analysis Tool,andthe orifice diameter wasadjusted to meet the pressure reliefrate. This paper introducesthecalculation characteristics and limitations of BLOWDOWN Analysis Tool,and analyzesthe variationsofparameters such as pressure, temperature andpressure relief rate duringpressure relief.After optimizingthepressure relief system usinga multi-orifice model, the peak flow canbe reduced by18.5%.

Key words: HYSYS')">

HYSYS, ire case;emergencypressure relief ')">BLOWDOWN Analysis Tool;fire case;emergencypressure relief