工业废碱催化剂MA与煤混合浸渍干燥的研究

以转筒干燥方式考察了福建无烟粉煤与工业废碱催化剂MA同时进行混合浸渍与干燥脱水的过程，讨论了煤的粒径，干燥温度，时间、气速、转筒转速、催化剂含量和转筒处理量等因素对煤与催化剂混合浸渍与干燥过程的影响。研究表明采用转筒干燥的方式,进口干燥空气温度在80 ℃～160 ℃、转筒处理量为214 kg/m3·h～1834 kg/m3·h、干燥气速0.12 m/s～0.30 m/s、干燥时间20 min内，混合物料的湿含量可降至<5%，且催化剂与煤浸渍充分均匀，满足流化床操作的要求，实现了最佳的催化气化效果。基于实验数据拟合了煤和废碱催化剂转筒干燥的传热系数方程，通过物料与能量衡算，模拟了混合物料连续干燥时沿转筒的湿含量的变化。

DIP-MIXING AND DRYING PROCESS OF FUJIAN ANTHRACITE AND INDUSTRIAL WASTE ALKALI

The rotary drying process for Fujian anthracite and alkali-salt by-product from chemical plants was studied. The factors such as coal particle size, drying temperature, drying time, gas velocity, rotary rate, catalyst component and drying capacity were discussed. At the drying temperature 80 ℃～160 ℃, drying capacity 214 kg/m3·h～1834 kg/m3·h, gas velocity 0.12 m/s～0.30 m/s and within 20 min，the moisture content of the mixture can be reduced to <5%.It shows that the rotary drying technique is very suitable for this process. The catalyst immerses into coal well and the admixture, produced from the rotary drying process, can be in good fluidization state during the gasification. The heat transfer coefficient equation for MA catalyst and Fujian anthracite is given by the regression of experimental data. Based on the mass and energy balances, the variations of drying characteristics along the rotary dryer are simulated, which is beneficial to the industrial design and analysis.