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A Clean-Coal Control Technology Application Study: Modelling and Control Issues for a Coal Gasifier

pubblicazioni - Memoria

A Clean-Coal Control Technology Application Study: Modelling and Control Issues for a Coal Gasifier

The dynamic behaviour of a coal slurry gasifier in an Integrated Gasification Combined Cycle is modelled by means of mass, energy and momentum conservation equations and of a description of reaction kinetics.

The main phenomena taken into consideration are slurry drying and devolatilisation, char and volatile gas combustion, char gasification and the water-gas shift reaction, and syngas cooling. The proposed 0- dimensional description is enough to capture process dynamics and it is a useful starting point for control design and verification. In particular, basic control strategies are discussed. Both model and control implementation is carried out in the Matlab-Simulink environment. Simulation results are shown to support model reliability and control effectiveness.

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