Chemical industry
REFERENCES IN CHEMICAL INDUSTRY
| PROCESSES | Control implementations |
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| Distillations | 3 |  |
| Splitter | 1 | |
| Naphtha steam reformer | 1 | |
| PTA distilation | 1 | |
| Réacteurs (polyols, toluène, polymères, polycondensation, carbonylation,...) | 15 |
BASF reactor (181 Kb) Dehydration tower YiZeng - China (70 Kb) Batch reactor JGC-Japan (390 Kb) Polyol reactor - REPSOL (246 Kb)Typical example : Polyols Reactor
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The dynamic control of the temperature in an exothermic chemical reactor is frequently the difficulty which limits the injection of reactants.
The exothermic reaction requires an efficient cooling in order to respect a temperature set point with the following trade-off : the highest possible value because that increases the strength of reaction and therefore speeds up the production while respecting a high constraint.
The PCR control modules are used with profit on this reactor, as the performances of traditional PID controllers were not good enough. The dynamic effects of heating and cooling equipments are very different. They were taken into account thanks to using the set “split range” from the PCR library based on predictive model technology.
The fluctuations are reduced at least by a ratio 2 and that makes possible for the producer to increase the temperature set point closer to the high constraint.
The increase of production, coming from the shift upwards of the temperature set point, is estimated between 17 and 20%
