Distillation column dynamics and control
| dc.contributor.author | Wilson, Grant | en |
| dc.date.accessioned | 2014-08-31T19:55:26Z | |
| dc.date.available | 2014-08-31T19:55:26Z | |
| dc.date.issued | 1979 | en |
| dc.description.abstract | A pilot plant scale, atmospheric pressure, sieve plate distillation column was constructed and fully instrumented. Novel speed controllable pumps were used to control liquid flows. A microcomputer was constructed to provide local and hierarchical control of the column. The microcomputer included an operator console, a 16 channel data acquisition unit, a 4 channel control output unit, and a hardware arithmetic processor. A software development system was assembled by linking the microcomputer to a minicomputer. Software written for the development system included a cross-assembler, a transfer program, and a microcomputer control program. A binary steady state distillation column model was developed, solved on a digital computer, and verified against experimental data using a binary mixture of methanol and water. Two control schemes were investigated using only the microcomputer resources. A multi-loop system using digital PI controllers was found to give excellent control within the accuracy of the instrumentation. An adaptive feedforward controller was proposed and verified using a steady state model, and experiments. The results were good, but because of the relatively simple dynamics of the experimental column, the feedforward controller was no better than the feedback controllers. A microcomputer control system has been shown to be an effective replacement for conventional analog control on a distillation column. The computing power of the microcomputer has enabled a sophisticated control scheme to be implemented at low cost. | en |
| dc.identifier.uri | http://hdl.handle.net/10092/9571 | |
| dc.identifier.uri | http://dx.doi.org/10.26021/1994 | |
| dc.language.iso | en | |
| dc.publisher | University of Canterbury. Chemical Engineering | en |
| dc.relation.isreferencedby | NZCU | en |
| dc.rights | Copyright Grant Wilson | en |
| dc.rights.uri | https://canterbury.libguides.com/rights/theses | en |
| dc.title | Distillation column dynamics and control | en |
| dc.type | Theses / Dissertations | |
| thesis.degree.discipline | Chemical Engineering | en |
| thesis.degree.grantor | University of Canterbury | en |
| thesis.degree.level | Doctoral | en |
| thesis.degree.name | Doctor of Philosophy | en |
| uc.bibnumber | 114848 | en |
| uc.college | Faculty of Engineering | en |
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