摘要
为了提高香菇副产物菇柄的附加值,应用气流粉碎和机械碾轧粉碎2种工艺分别对菇柄进行超微处理。对气流粉碎工艺中的分级机转速,机械碾轧粉碎工艺中的主机频率、风机频率等操作参数进行了单因素分析,进一步结合分段线性拟合法对2种工艺的加料速度进行了优化,分别得出了2种工艺的较适工艺条件;并对二者的粉碎效果、处理时间、能耗和出品率进行了比较。结果显示:气流粉碎的较适工艺条件为:分级机转速2 400 r/min,加料速度12 kg/h;机械碾轧粉碎的较适工艺条件为:主机频率44 Hz,风机频率42 Hz,加料速度5 kg/h。2种超微粉碎方式都能获得10μm以下的微粉,与机械碾轧粉碎相比,气流粉碎的分级精度较高,处理时间缩短了56.43%,但出品率较低,能耗为前者的4.77倍。总体来看,机械碾轧粉碎更适合规模化生产,该研究为超微粉碎技术应用于香菇柄深加工利用提供了技术依据。
Air jet milling and wheel grinding were used to superfine pulverize lentinus edodes stem to improve added values.The operation parameters such as classifier rotating speed of air jet milling,host frequency and fan frequency of wheel grinding and feeding speed of two processes were analyzed and optimized using single factor test and piecewise linear fitting method.The pulverizing effect,processing time,production rate and energy consumption of two equipments were compared under respective optimized operation conditions.The results showed that the optimized rotating speed and feeding speed of air jet milling were 2400 r/min and 12 kg/h,respectively.The optimized host frequency,fan frequency and feeding speed of wheel grinding were 44Hz,42 Hz and 5 kg/h,respectively.The superfine powder with particle median diameter（D50） less than 10μm could be obtained by both superfine pulverizing methods.Compared with wheel grinding,air jet milling pulverized powder more precisely（with narrower particle size distribution） and spent less processing time（shortened by 56.43%）,but obtained lower production rate and required higher energy consumption（4.77 times）.On the whole,the wheel grinding method was more suitable for scale production of lentinus edodes stem.This research provides technical basis for the development and application of superfine pulverizing technology in lentinus edodes stem processing.
出处
《农业工程学报》
EI
CAS
CSCD
北大核心
2012年第8期280-286,共7页
Transactions of the Chinese Society of Agricultural Engineering
基金
湖北省科技研究与开发项目(鄂财企发2011-97-402)
武汉市科技攻关计划(201120822278-1)
关键词
优化
工艺
农产品
香菇柄
气流粉碎
机械碾轧粉碎
分段线性拟合
optimization
processing
agricultural products
lentinus edodes stem
air jet milling
wheel grinding
piecewise linear fitting
