RESEARCH AND SIMULATION OF FAST, STRONG EXOTHERMIC REACTION IN GAS-SOLID FLUIDIZED BED ABOUT TEMPERATURE DISTRIBUTION AND HOT SPOT PROBLEM

摘要

Gas-solid fluidized bed is widely used in petro-chemical and coal-chemical industry and other fields because of its superior heat transfer and mass transfer performances. In consideration of these performances, it is generally believed that there is a uniform temperature distribution and no hot spot in gas-solid fluidized bed compared with fixed bed. But in real industrial processes of fast, strong exothermic reactions, there are great axial and radial temperature differences and even hot spots in gas-solid fluidized bed.