Study on Partial Gasification Characteristics of Coal in a 2MW Pressurized Spout-fluidized Bed

Coal partial gasification characteristics under large bed height conditions were studied together with effects of varying steam-coal ratio on a pressurized spout-fluid bed test rig for partial gasification of coal. Study results show that gasification can proceed deep in the bed and the gasifying reaction can approach chemical equilibrium at a proper ratio of spouting to fluidizing air. With other operating parameters are fixed, and only the steam-coal ratio increasing, the temperature in the gasifier decreases, while the concentration of hydrogen in the coal gas and the gas heating value increases. Figs 6, tables 5 and refs 10.