射频场内孔分散结构对物料温度分布及其杀虫效果的影响

为解决射频杀虫时加热不均匀而导致杀虫不彻底的问题,从孔方向、空实心、孔数量、孔径和分布方式方面研究孔分散结构在提升射频加热速率和加热均匀性方面的作用以及在杀虫方面的应用.以大米为材料,试验发现在促进加热效果上竖向分散结构优于横向,空心优于实心.当孔径相同时,孔数量越多效果越好.当孔数量相同时,孔径越大效果越好.等距分布...

Effects of Pore Dispersed Structure on the Material's Temperature Distribution and Deinsectization in Radio Frequency Treatment

In order to solve the problem of incomplete deinsectization caused by uneven heating of radio frequency,this paper studied the role of pore dispersion structure in improving the radio frequency heating rate and the heating uniformity and its application in insecticidal application from the aspects of pore direction,hollow solid,pore number,pore diameter and distribution mode.Taking rice as an example,it was found that the vertical dispersed structure was superior to the horizontal structure and the hollow structure was superior to the solid core in promoting the heating rate.With the same pore size,the more holes,the better the effect.With the same number of holes,the larger the diameter,the better the effect.The equidistant distribution has the highest heating rate,but the concentrated distribution of the cold area has the best heating uniformity.After using the 12-pore 22 mm dispersed structure for radio frequency deinsectization,the death rate of adult rice weevils in the samples increased from 16.8% in the control group to 100% after heating for 7 min.For the red flour beetle,the death rate increased from 8.7% in the control group to 98.1% after radio frequency heating for 10 min.