石灰石/石膏湿法脱硫真空皮带机脱水效果影响因素研究

Study on factors influencing dewatering effect of vacuum belt system for wet limestone-gypsum FGD process

介绍真空皮带机脱水过程的基本原理及其在石灰石/石膏湿法脱硫中的应用情况,以石膏含水率为对象研究了石膏脱水效果的影响因素及影响规律:石膏浆液物料本身的物理特性如石膏中所含杂质、石膏的粒度分布、石膏中氯离子含量等对石膏含水率的影响规律;真空皮带机的运行参数、运行故障、烟气脱硫工艺条件等对石膏含水率的影响。根据上述研究结果,从工艺及设备运行角度探讨如何确保石膏含水率,为石灰石/石膏湿法烟气脱硫工艺中石膏脱水系统的优化稳定运行提供参考依据。

This paper illustrates the basic principle of vacuum belt dewatering process and its application in a wet limestone-gypsum FGD system. Taking water content of gypsum as an objective, it studies the factors influencing dewatering effect of gypsum and the laws they obey, including laws of influence from physical property of gypsum slurry such as impurities contained, particle size distribution, and chlorion content etc., and influences of both operation parameters and faults of vacuum belt conveyor and conditions of FGD process. Based upon the aforementioned study results, it probes into the way of ensuring water content of gypsum from the angles of technology and equip- ment operation, and provides a reference for optimized stable operation of gypsum dewatering system in wet limestone-gypsum FGD process.