Question $3$

$28$ marks

$($a$)$ In reference to the fourteen elements of the Process Safety Management $($PSM$),$ outline the technical and safety requirement for the following two elements:

$($i$)$ Process Safety Information $($PSI$).$

$[5$ marks$]$

$($ii$)$ Process Hazard Analysis $($PHA$).$

$[5$ marks$]$

$($b$)$ The distillation column T$-101$ and its accessory equipment $($condenser$,$ E$-101,$ reboiler, E$102,$ the pump, P$-101$A$/$B and the reflux drum, V$-101)$ and cooler E$-103$ is shown in Figure Q$3.$

$($i$)$ Examine and interpret the control loops on the PDF and specify for each loop the control objective, the controlled and manipulated variables.

$[5$ marks$]$

$($ii$)$ Propose an additional control scheme needed to maintain a safe and proper operation of the distillation column T$-101?$

$[5$ marks$]$

$($c$)$ Propose a HAZOP study to improve the safety of the process for the study node, the bottom line $($stream $3).$ Use the guide$-$words high and low to the process parameters: flow, temperature and pressure.

$[8$ marks$]$