• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>Control Systems 98 Conference on the Development and Application of Process Control and Management Technology in the Pulp and Paper Industry "Information Tools to Match the Evolving Operator Role", Sep 1-3, 1998, Porvoo, Finland >ADVANCED COATING TECHNOLOGY EXPERIENCE
【24h】

ADVANCED COATING TECHNOLOGY EXPERIENCE

机译：先进的涂层技术经验

获取原文
获取原文并翻译 | 示例
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Advanced Coating Technology (ACT) is a new on-line system that integrates measurement and modelling to predict the location of the gel point, which is used as a quantitative representation of print quality in the coating process. As part of ACT, a machine direction (MD) drying model has been developed recently as a co-operative project by Honeywell-Measurex and Sappi, Gratkorn. This model was installed at the Sappi, Gratkorn mill on two coating machines producing woodfree coated (WFC) paper and measuring respectively 6.4m and 8.5m wide. An overview of the modelling scheme and initial results from the mill installation are presented. The MD drying model is based on energy and mass balances, with emphasis on the modelling of ambient and boundary air conditions. The gas consumption and scanner measurements at the beginning of each coaler are used as model input values. The computed web values are compared with the scanner measurements at the end of each coating station. Several additional on-line temperature measurement sensors have been installed to compare the measured and computed values at the measurement locations. The results show a good agreement of the model predictions with measurements. The model computes temperature, moisture and partial pressure MD profiles for the base sheet and the coating layer. These profiles, and especially the position of a given coat moisture gel point and the evaporation rate in its surroundings, are correlated with the printability mottle number of coated paper. The model is tuned if the computed evaporation and temperature correspond to the measurements for different drying conditions. The MD drying model result is the run-time conditional probability of the mottling number and is representative of the drying process performance.
机译：Advanced Coating Technology（ACT）是一种新的在线系统，该系统集成了测量和建模功能以预测胶凝点的位置，该胶凝点被用作涂层过程中印刷质量的定量表示。作为ACT的一部分，Honeywell-Measurex和Grapkorn的Sappi合作开发了机器方向（MD）干燥模型。该模型安装在Gratkorn的Sappi纸厂的两台涂布机上，该涂布机生产无木质涂层（WFC）纸，尺寸分别为6.4m和8.5m。介绍了建模方案和轧机安装的初步结果的概述。 MD干燥模型基于能量和质量平衡，着重于环境和边界空气条件的建模。每个合并器开始时的气体消耗和扫描仪测量值均用作模型输入值。在每个涂布站结束时，将计算出的纤网值与扫描仪测量值进行比较。已安装了几个附加的在线温度测量传感器，以比较测量位置处的测量值和计算值。结果表明模型预测与测量结果吻合良好。该模型计算基片和涂层的温度，湿度和分压MD曲线。这些轮廓，特别是给定的涂料水分胶凝点的位置和其周围的蒸发速率与涂料纸的可印刷性斑点数相关。如果计算出的蒸发量和温度对应于不同干燥条件下的测量值，则对模型进行调整。 MD干燥模型的结果是杂色数的运行时条件概率，代表干燥过程的性能。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号