Reference no: EM131463299

Process Measurement, Dynamics & Control Assignment

The P&ID in Figure 1 shows the equipment needed to perform an experiment to determine the effect that Temperature, Flow rate and Concentration of NaOH have on cleaning a consumer healthcare product from inside sections of pipe work (S001 and S002). The purpose of the experimental rig is to investigate the potential for cost savings on a large-scale process by optimising the standard operating cleaning procedure.

To set up the experiment, first the sections of pipe work S001 and S002 are removed from the rig. The pipes are then filled with product before being replaced in situ. The properties of the product are that it is an opaque, viscous liquid that is soluble in water.

T001 contains pure water and is kept at a constant level using a float valve. It provides the water for T002 and for rinsing the system after cleaning.

T002 is used to make up different concentrations of NaOH in water. To increase the bulk temperature of this cleaning mixture, the fluid is pumped using P001 through the heat exchanger X001 and re-circulates back into T002, by-passing the test sections by opening valve V004.

To perform an experiment, the heated cleaning fluid is passed through either S001 or S002 before going back into either; the feed tank (T002), the collection tank (T003) or to the drain depending on the mode of operation required by the operator.

a) Specify all the instrumentation and control loops that you think are necessary for the operator to perform this experiment and gather as much useful data as possible. You should state the reasons for your choice of instrumentation.

b) Using the information provided in Table 1, re-draw the P&ID including the instruments you have selected taking care to ensure appropriate placement of the devices. The diagram should drawn to an A3 size using an appropriate software package such as Microsoft Visio and be of a professional standard.

Instructions

Your report should be no more than 3 pages and in addition should include your finalised P&ID as an appendix. The contents of the report should focus on the justification of your choice of instrument and their locations/ control loop pairings.

	First Letter		Succeeding Letters
	Measured or Initiating Variable	Modifier	Read Out or Passive Function	Output Function	Modifier
A	Analysis		Alarm
B	Burner or Combustion		User's Choice	User's Choice	User's Choice
C	User's Choice (e.g. Conductivity)			Control
D	User's Choice (e.g. Density)	Differential
E	Voltage or emf		Sensor or Primary Element
F	Flow rate	Ratio/Fraction
G	User's Choice		Sight Glass or Viewing Device
H	Hand				High
I	Electrical Current		Indicate
J	Power	Scan
K	Time or Schedule	Rate of Change		Control Station
L	Level		Light (Pilot)		Low
M	User's Choice (e.g. Moisture/Humidity)	Momentary			Middle
N	User's Choice		User's Choice	User's Choice	User's Choice
O	User's Choice		Orifice or restriction
P	Pressure or Vacuum		Point (Test)
Q	Quantity (e.g. Conc./Conductivity)	Integrate/Totalise
R	Radiation		Record or Print
S	Speed or Frequency	Safety		Switch
T	Temperature			Transmit
U	Multivariable		Multifunction	Multifunction	Multifunction
V	Vibration or Mechanical Analysis			Valve or Damper
W	Weight or Force		Well or Pocket
X	Unclassified	X-axis	Unclassified	Unclassified	Unclassified
Y	Event, State or Presence	Y-axis		Relay, Compute or Convert
Z	Position or Dimension	Z-axis		Driver, Actuator or Other