Difference between revisions of "PH Loop"
(→Piping & Instrumentation diagrams) |
(→Wiring diagrams) |
||
| Line 29: | Line 29: | ||
=== Wiring diagrams === | === Wiring diagrams === | ||
| − | [http://ragnarok.up.ac.za/Rigs/02_pH/ | + | [http://ragnarok.up.ac.za/Rigs/02_pH/2010/02pH_WiringDiagram_2010.vsd .VSD (Visio)] | [http://ragnarok.up.ac.za/Rigs/02_pH/2010/02pH_WiringDiagram_2010.pdf .PDF] |
== Rig maintenance == | == Rig maintenance == | ||
The maintenance of the pH rig is documented [[PH Rig Maintenance|here]]. | The maintenance of the pH rig is documented [[PH Rig Maintenance|here]]. | ||
Revision as of 11:38, 10 November 2010
PH control is a difficult problem due to the highly non-linear nature of the system. The steep slope of the titration curve around the pH = 7 point amplifies pH variations for even small base/acid addition variations. The pH control rig in the PMC lab illustrates that pH control is by no means impossible (albeit on a laboratory scale).
Contents
Current/Previous projects
1999
F.J. Botha, Ondersoek van die Dinamiese Gedrag van Sisteme waar pH Gemeet en Beheer word {Investigation of the Dynamic Behaviour of Systems where pH is Measured and Controlled}
[Hard copy of report available in pH rig folder]
2003
T. Leeuw & G. Mascini, pH Rig 2003 - CPL780 Process Control Laboratory
Report | Project files
2005
A.J. Swanepoel & M. Swanepoel (Botha), Model Based Control Laboratory, pH Control
Report | Project files
2007
C. Steyn, Fuzzy Logic Rule-Based Controller Design, Neutralization of Strong Acid with Strong Base
Report | Project files
2009
A.H. Campher, Maintenance, Modelling and Control of the pH-control Rig
Report | Project files
2010 (Current)
A.B. De Jongh, Control of a pH neutralisation system using Gain Scheduling
Report |
Project files
Documentation
Large scale renaming of instruments, valves and tanks is being done. This renders all previous rig diagrams obsolete. Only 2009-updated diagrams should henceforth be used.
Piping & Instrumentation diagrams
Wiring diagrams
Rig maintenance
The maintenance of the pH rig is documented here.
