A NUMERICAL-SIMULATION OF A JETTING FLUIDIZED-BED COAL GASIFIER

A numerical simulation study was conducted for a jetting fluidized bed coal gasifier with a conical distributor. It was based on a steady-st ate model which took account of hydrodynamics, mass heat transfer and reactions in the grid zone, bubble zone and freeboard zone of the gasi fier. Temperature of the particles and gas in the jet, compositions in the dilute phase and the dense phase, and some hydrodynamic character istics were calculated. Effects of some operating conditions such as o xygen and steam flow rates, bed temperature and bed pressure on the te mperatures in the jet and gas compositions in the gasifier were numeri cally investigated. (C) 1997 Elsevier Science Ltd.