PFD/PID industry example Wiki Page

Written by: Matt Robinson, JT Rumble, Chris Larson

Process Description
This PFD/P&ID is taken from a brewery which is planned to produce 100,000 bottles a day of beer. This section includes boiling and fermentation. The process starts by using steam to boil the beer in KB-301, which sterilzes the beer. Next, the beer is pumped into a whirlpool filter where impurities are removed. The beer is then cooled to 15 degrees C, using a heat exchanger E-306. Once the beer is cooled, it is sent to the fermentation tank, TK-307. Here yeast is added, which metablozies sugar in the beer into alcohol and carbon dioxide. After a couple days, the beer is sent to a maturation tank, TK-314. The beer spends about 4 days in this tank, before it is clarified and bottled.

PFD
A PFD for the process is here:



Image courtesy of John Trumble, University of Michigan

The PFD contains stream compositions on the border, instead of the equipment. The overall flow rates through each stream can be seen on the PFD also.

P&ID
A P&ID for the process is here:



Image courtesy of John Trumble, University of Michigan

The first difference to notice on the P&ID from a PFD is the border template. Instead of stream compositions being listed, there is a list of the equipment, along with a key for abbreviations used on the diagram. On the diagram itself, there are valves and controllers which are not present on a PFD. For example, V-5 is the valve right before the boiler or the pressure controller PC 1, which is represented by a circle located on the boiler. These devices are also not on the PFD.