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采用终端开路同轴探头反射法测量了含水率0%～5%的氯化钠反射系数,研究了微波频率、含水率和温度对氯化钠含水物料吸波性能的影响,并对氯化钠的微波干燥工艺进行分析。结果表明:微波频率在2.3～2.6 GHz对物料的吸波性能影响不大,含水率的增加能显著提高物料的吸波能力和微波能的耗散,氯化钠的吸波性能与含水率之间存在线性关系,温度升高也会引起物料吸波性能显著提升;通过对物料微波干燥工艺研究得到较好的微波干燥工艺条件:干燥温度60～70℃、干燥时间70～90 s、物料厚度35～45 mm。
The open-circuit coaxial probe reflection method was used to measure the reflection coefficient of sodium chloride with 0% ~ 5% moisture content. The influence of microwave frequency, moisture content and temperature on the microwave absorbing property of sodium chloride aqueous material was studied. Microwave drying process for analysis. The results show that the microwave frequency of 2.3 ~ 2.6 GHz has little effect on the microwave absorption performance of the material. The increase of moisture content can significantly increase the absorbing ability of the material and the dissipation of microwave energy. The microwave absorption capacity and moisture content of sodium chloride There is a linear relationship between the temperature rise and the material will cause the microwave absorption performance significantly improved; microwave drying process through the study of materials obtained better microwave drying conditions: drying temperature 60 ~ 70 ℃, drying time 70 ~ 90 s, material thickness 35 ~ 45 mm.