Hydrodynamics of a Dual Fluidized Bed Gasifier. Part II: Simulation of Solid Circulation Rate, Pressure Loop and Stability
نویسندگان
چکیده
This paper focuses on the determination of the solid circulation of a CFB gasification system with a dual fluidized bed concept and the distribution of the solid hold up at different fluidization conditions. A mathematical model of the riser was designed and implemented in a model of a dual fluidized bed system. This model contains routines for calculation of each section of the dual fluidized bed system. The behavior of the system was analyzed regarding changes in solid inventory and variations of geometry. A diagram is presented which allows an illustration of the influence of changes in the dual fluidized bed system configuration on the resulting stable operation points. Analysis concerning the effect of counter pressure on combustion and gasification side revealing the role of the seal loop in stabilizing the operation of the gasification system.
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