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A two-dimensional numerical gas-solid flow models without chemical reactions were developed to simulate gas-solid flow in the Biomass fluidized bed boiler with a height of 300 cm and width of 57 cm through MFIX software. Two main different zones can be distinguished in terms of granular flow mechanisms. According to the distributions of instantaneous particle velocity and concentration at the boundary...
The hydrodynamics of a two-dimensional bed reactor were studied computationally. To describe the particulate phase stress in the Eulerian-Eulerian two-fluid model, the kinetic theory of granular flow has been used. Syamal O'Brien drag function was used to calculate momentum exchange coefficients between gas and solid phases. We specified diameter of glass beads which is 300μm and restitution coefficient...
Numerical simulation of gas-solid flow in fluidized bed has been carried out based on two-fluid model (TFM) in the paper. The influence of different height of bed material, superficial velocity, restitution coefficient of granular elasticity, drag model and time step calculated on phase mixing and bubbles appeared was analyzed and investigated. The results showed that by using the same drag model,...
In this paper, experiments were carried out to investigate the effect of calcium carbonate (CaCO3) additive on agglomeration caused by burning neutral sulfite semi-chemical (NSSC) black liquor in a bench-scale fluidized bed. The experiments can be performed under temperatures ranging from 700 to 800??C, at additive dosages from 0 to 30%. The experimental phenomenon shows that CaCO3 is a significant...
The process of co-combustion of municipal solid waste with sludge for power generation was simulated by ASPEN PLUS in this paper. Thermodynamic analysis was carried out according to the simulation results later. The results showed that: Using exhaust gas as heat source to dry the sludge could improve the generation efficiency; The exhaust flue gas of 423 K could decrease the sludge moisture content...
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