基于EDEM-Fluent仿真的餐厨垃圾渣液分离机设计与试验

Design and test of the separator of kitchen waste residue liquid based on EDEM fluent simulation

针对现有的大型餐厨垃圾处理生产线资金投入较大、设备运维成本较高以及小型餐厨垃圾处理设备作业形式单一的问题,基于SolidWorks设计了一种集送料、粉碎、压缩、脱水于一体,以实现餐厨垃圾资源化利用的高集成化、高自动化、低能耗和低运行成本的餐厨垃圾渣液分离机。通过EDEM软件建立相应的颗粒模型,并结合Fluent中的重整化群RNGk—ε湍流模型对餐厨垃圾粒子运动参数进行分析和优化。仿真分析以及样机试验结果表明,该餐厨垃圾渣液分离机在螺杆转速为150r/min时,餐厨碎渣在输送桶内运转稳定,速度保持在0.05~0.07m/s。在4.75~4.90s时,颗粒的速度达到最大值0.14m/s,受力达到最大值1.49N,可以实现快速和有效的固液分离,并且显著减少了有害物质留存,获得了更高的资源回收率。

Aiming at the problems of large-scale food waste treatment production line,such as large capital investment,high cost of equipment operation and maintenance,and single operation form of small-scale food waste treatment equipment,based on SolidWorks,a kind of food waste treatment equipment,which integrates feeding,crushing,compression and dehydration,is designed to realize high integration,high automation,low energy consumption and low operation cost of food waste resource utilization Slag liquid separator.The particle model was established by EDEM software,and the particle motion parameters of kitchen waste were analyzed and optimized by RNGk—εturbulence model in Fluent.The results show that when the screw speed of the separator is 150 r/min,the operation of the separator is stable and the speed is kept at 0.05~0.07 m/s.In the range of 4.75~4.90 s,the velocity of particles reaches the maximum value of 0.14 m/s,and the force reaches the maximum value of 1.49 N,which can achieve fast and effective solid-liquid separation,significantly reduce the retention of harmful substances,and obtain higher resource recovery.