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| 高强瓦楞原纸干燥曲线在线测量与分析 |
| Online Measurement and Analysis of Drying Curve of a High-strength Corrugating Medium Machine |
| 收稿日期： |
| DOI：10.11980/j.issn.0254-508X.2014.08.002 |
| 关键词: 高强瓦楞原纸 干燥部 干燥曲线 |
| Key Words:high strength corrugating medium drying section drying curve |
| 基金项目: |
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| 摘要:通过在线测量某高强瓦楞原纸厂干燥部不同烘缸位置湿纸幅的定量，获得纸幅干燥曲线，采用最小二乘法拟合，获得最能解释纸幅干燥过程的干燥曲线模型。利用该模型对测试对象干燥部进行分析，得到干燥曲线和各烘缸出力情况，结合纸幅温度测量数据，可知测试对象纸幅干燥过程为：纸幅加热阶段（1#~2#缸）、恒速干燥阶段（3#~22#缸）、减速干燥阶段（23#~48#缸）。该原纸临界含水率为0.29 g水/g（d.s.）。烘缸出力最大在8#缸位置，为29.17 kg水/(m2·h)。 |
| Abstract:The basis weights of the web on different dryers were measured online to obtain the drying curve in the drying section of a high-strength corrugating medium machine, and a series of models were adopted to simulate the process of paper drying. The result showed that the Model 5 was the best model to describe the drying process. In addition, the Model 5 was used for drying kinetics analysis in the drying section of the paper machine, a simulated drying curve and drying rate were obtained, combining with the sheet temperature measured we could find: the paper drying process, “sheet-heating phase”(1#~2# cylinder); “constant rate drying phase”(3#~22#cylinder) and “reducing drying rate phase”(23#~48#cylinder). The critical moisture content was 0.29 g water/g(d.s.). The highest drying rate was 29.17 kg water(m2·h) at the cylinder 8#. |
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