Neutralization Water Unit
Author
Sansaridis, Christos
Term
4. term
Education
Publication year
2016
Pages
102
Abstract
This master thesis, proposed by ELFE (Hellenic Fertilizers Industry), investigates improvements to the control strategy of the neutralization water unit in an ammonia plant. The neutralization unit treats wastewater produced during regeneration of the demineralization unit for safe disposal to the sea, while the demineralization unit supplies demineralized water for steam generation. The work develops two process models: a pilot single-tank system and the actual two-tank configuration used at the plant. Both models are derived and linearized to address inherent nonlinearities by using linearization around an operating point and inversion of the nonlinear function. An observer-based PI controller is designed to regulate the systems. The models and control strategy are implemented in Simulink, and simulation results are presented and evaluated.
Denne masterafhandling, foreslået af ELFE (Hellenic Fertilizers Industry), undersøger forbedringer af styringsstrategien for neutraliseringsvandsenheden i en ammoniakfabrik. Neutraliseringsenheden behandler det spildevand, der opstår under regenereringen af demineraliseringsenheden, så det kan bortskaffes sikkert til havet, mens demineraliseringsenheden leverer demineraliseret vand til dampproduktion. Arbejdet udvikler to procesmodeller: et pilotanlæg med én tank og den faktiske konfiguration med to tanke på fabrikken. Begge modeller afledes og lineariseres for at håndtere ikke-lineariteter ved hjælp af linearisering omkring et arbejdspunkt og inversion af den ikke-lineære funktion. En observer-baseret PI-regulator udformes til at regulere systemerne. Modeller og styring implementeres i Simulink, og resultater fra simuleringer præsenteres og evalueres.
[This apstract has been generated with the help of AI directly from the project full text]