Xing Liming, Zhao Zhengsheng
Shaanxi University of Chinese Medicine, Xianyang 712046, China.
Zhongguo Zhong Yao Za Zhi. 2012 Jul;37(13):2034-6.
To propose measures for enhancing thermal energy utilization by analyzing drying process and operation principle of fluidized bed dryers,in order to guide optimization and upgrade of fluidized bed drying equipment.
Through a systematic analysis on drying process and operation principle of fluidized beds,the energy conservation law was adopted to calculate thermal energy of dryers. The thermal energy of fluidized bed dryers is mainly used to make up for thermal consumption of water evaporation (Qw), hot air from outlet equipment (Qe), thermal consumption for heating and drying wet materials (Qm) and heat dissipation to surroundings through hot air pipelines and cyclone separators.
Effective measures and major approaches to enhance thermal energy utilization of fluidized bed dryers were to reduce exhaust gas out by the loss of heat Qe, recycle dryer export air quantity of heat, preserve heat for dry towers, hot air pipes and cyclone separators, dehumidify clean air in inlets and reasonably control drying time and air temperature.
Such technical parameters such air supply rate, air inlet temperature and humidity, material temperature and outlet temperature and humidity are set and controlled to effectively save energy during the drying process and reduce the production cost.
通过分析流化床干燥机的干燥过程及运行原理，提出提高热能利用的措施，以指导流化床干燥设备的优化升级。
通过对流化床干燥过程及运行原理进行系统分析，采用能量守恒定律计算干燥机的热能。流化床干燥机的热能主要用于弥补水分蒸发的热消耗（Qw）、设备出口热风带走的热量（Qe）、加热和干燥湿物料的热消耗（Qm）以及通过热风管道和旋风分离器向周围环境散热。
提高流化床干燥机热能利用的有效措施和主要途径是减少因热量Qe损失而排出的废气，回收干燥机出口的热风量，对干燥塔、热风管道和旋风分离器进行保温，对入口清洁空气进行除湿，并合理控制干燥时间和空气温度。
设置并控制诸如送风速率、进风温度和湿度、物料温度以及出口温度和湿度等技术参数，可在干燥过程中有效节能并降低生产成本。
