Abstract
In this work, using the case of a modular refinery we study the pressure profiles in different sections of the process. This information is used to identify the various systems where overpressure occurs, as well as evaluate the contingencies put in place to control it. Cases where the controls are inadequate and the implications on process continuity are also assessed.
To solve the challenge created by overpressures in a process facility, an evaluation of the root cause and a clear definition of the conditions under which they occur were done. Certain thermodynamic principles, in combination with process conditions, fluid characteristics, and the mechanics of the process, will be applied to highlight areas at risk of overpressures and recommend proactive steps to mitigate them. Modifying process design to account for overpressures could create a headache that "pounds more than a square inch". What controls should be put in place to cater to these pressures, what measurement and monitoring equipment should be used, and does the risk of overpressures justify the economic implication of this additional equipment? And finally, do these measures compromise the performance of the facility? These are the questions that were answered in taming this "Wild beast".
In process design, pressure control is key to achieving operational continuity. Much like a perfect equestrian performance, a process operating within its design conditions can be very fulfilling. There is a great need to plan (design) to ensure your show horse (process fluids) responds appropriately to obstacles (process conditions) it meets along the way. The effect of pressure on flow, temperature, phase behaviour, and volumes makes it an indispensable tool to control process conditions.
