摘要
针对螺旋挤压机对不同类型畜禽垃圾挤压脱水效果不佳和挤压过程的指标不明确的问题,课题组采用间断螺旋结构对螺旋挤压固液分离机进行优化设计。以压力梯度和出料中水的质量分数作为挤压脱水过程的评价指标,选择螺杆转速、开合行程和入料中水的质量分数为影响因素进行正交实验,探究工艺参数对挤压和脱水效果的影响。结果表明:螺旋挤压脱水过程中对压力梯度影响由大到小为入料中水的质量分数、螺杆转速和开合行程,对出料中水的质量分数影响由大到小为螺杆转速、入料中水的质量分数和开合行程。压力梯度的大小能有效反映挤压过程的挤压和脱水效果,调整螺旋挤压机的螺杆转速和开合行程可适应不同类型的物料;在螺杆转速为25.00 r/min,开合行程为45.00 mm和入料中水的质量分数为84.00%时,螺旋挤压机能实现畜禽垃圾最佳挤压和脱水效果。
To solve the problems of poor dewatering effect and unclear indexes of extrusion process of different types of livestock and poultry garbage by screw extruder,the screw extruder solid-liquid separator was optimized with discontinuous screw structure.Taking pressure gradient and mass fraction of water in discharge as evaluation indexes of extrusion dewatering process,orthogonal experiments were carried out with screw speed,opening and closing stroke and mass fraction of water in the feed as influencing factors to explore the influence of process parameters on extrusion effect and dewatering effect.The results show that the influence on pressure gradient during screw extrusion dewatering is,in descending order,mass fraction of water in the feed,screw speed and opening stroke.The influence on themass fraction of water in discharge from large to small isthe screw speed,the mass fraction of water in the feed and the opening and closing stroke.The pressure gradient can effectively reflect the extrusion dewatering effect during extrusion process.Adjusting the screw speed and opening stroke of the screw extruder can adapt to different types of materials.At the screw speed of 25.00 r/min,the opening and closing stroke at 45.00 mm and the mass fraction of water in the feed of 84.00%,the screw extruder can achieve the best extrusion and dewatering effect of livestock and poultry garbage.
作者
徐稳
董淑宏
张洪
于培师
赵军华
张林
XU Wen;DONG Shuhong;ZHANG Hong;YU Peishi;ZHAO Junhua;ZHANG Lin(School of Mechanical Engineering,Jiangnan University,Wuxi,Jiangsu 214122,China;Jiangsu Provincial Key Laboratory of Advanced Food Manufacturing Equipment Technology,Jiangnan University,Wuxi,Jiangsu 214122,China;Jiangsu Huilin Environmental Protection Technology Co.,Ltd.,Yancheng,Jiangsu 224021,China)
出处
《轻工机械》
CAS
2023年第5期96-104,共9页
Light Industry Machinery
基金
国家自然科学基金(11972171)。
关键词
畜禽垃圾
螺旋挤压
压力梯度
出料中水的质量分数
正交试验
livestock and poultry garbage
spiral extrusion
pressure gradient
outlet humidity
orthogonal test
