微波膨胀烟梗制丝关键工艺参数对梗丝加工质量的影响
Effects of key technological parameters of microwave expanded tobacco stem on the processing quality of stem
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摘要: 为提升烟梗利用率及梗丝加工质量，研究了微波膨胀烟梗制丝加工过程中烟梗分选、蒸汽微波协同膨胀、膨胀烟梗回潮、烟梗复切、气流干燥等关键工序中工艺参数对梗丝加工质量的影响，得到优选的工艺参数为：1）烟梗分选工序中选择长度≥ 2 cm的短梗和直径≥ 3.0 mm的细梗；2）蒸汽微波协同膨胀工序中物料流量240~270 kg/h，过热蒸汽流量950~1050 kg/h，腔体温度148~151℃，微波功率36~39 kW；3）膨胀烟梗回潮工序中水洗时间>50 s，回潮后含水率在30.5%左右，回潮后贮存时间≥ 4 h；4）烟梗复切工序中采用前高后低的组合方式，切片厚度0.60 mm，切丝宽度0.30 mm，刀门压力30~35 kN，刀辊转速400~450 r/min；5）梗丝气流干燥工序中物料流量150 kg/h，工艺气体流量6500 m3/h，温度196℃.在该制丝工艺条件下加工的梗丝宽度与叶丝更接近，梗丝结构更加均匀，梗丝综合质量较好.Abstract: In order to improve the utilization rate of tobacco stems and the processing quality of stem shreds, the processing parameters of tobacco stems sorting, steam and microwave co-expansion, expanded tobacco stem remoisture, tobacco stem recutting, airflow drying and other key process parameters in the processing of microwave expanded tobacco stem shreds were studied. The optimal process parameters were as follows:tobacco stem sorting process selected short stems with a length of ≥ 2 cm and fine stems with a diameter of ≥ 3. 0 mm. The material flow rate in the steam-microwave co-expansion process was set at 240~270 kg/h, the superheated steam flow rate was 950~1050 kg/h, the cavity temperature was 148~151℃, and the microwave power was between 36~39 kW. When the water washing time in the moisture regaining process of expanded tobacco stems was greater than 50 s, the moisture content of Conditions was 30. 5% The storage time after conditioning was not less than 4 hours. The combination method of front high and low back was used in the re-cutting process of tobacco stems. The slice thickness was 0. 60 mm, the cutting width was 0. 30 mm, the knife door pressure was 30~35 kN, and the knife roller rotation speed was within the range of 400~450 r/min. The material flow rate was 150 kg/h, the process gas flow rate was 6500 m3/h, and the temperature was 196℃. The width of the stalk processed by the silk-making process was closer to that of the leaf stalk, the stalk structure was more uniform, and the overall quality of the stalk was better.
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Key words:
- microwave expanded tobacco stem /
- silk-making process /
- processing quality
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