An Improved Dynamic Model and Simulation of Shell Gasifiers Based on Slag Layer Method

To solve the problem that conventional model of gasifier based on lumped slag layer method can’t reflect the distributed-parameter characteristics in the gasifier, a new cell-slag model was built to cover the shortage of conventional model, which takes the advantage of both the lumped slag layer method and the cell method for simulation of coal slurry gasifiers. Using the new model, numerical simulation was made on a shell gasifier, of which the results obtained at both steady and dynamic state were analyzed and compared with corresponding literature data and the simulation results based on original lumped slag layer method. Results show that the simulation results by the cell-slag method agree well with corresponding literature data, proving the new method to be feasible and superior to conventional model in simulation of distributed-parameter characteristics.