• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文学位 >Incorporation of environmental, economic and product quality criteria in multiobjective engineering design of chlorine/chlorine dioxide softwood kraft pulp bleaching processes.
【24h】

Incorporation of environmental, economic and product quality criteria in multiobjective engineering design of chlorine/chlorine dioxide softwood kraft pulp bleaching processes.

机译：在氯/二氧化氯软木牛皮纸浆漂白工艺的多目标工程设计中纳入环境，经济和产品质量标准。

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

A Pareto approach to Environmentally-Conscious Design and Manufacturing (ECDM) was developed and implemented for design of first-stage chloroorganics formation and lignin removal processes in Cl2/ClO2 softwood kraft pulp bleaching. A new model, the “(C+D) Model”, was developed to quantitatively simulate first-stage chemical reactions leading to chloroorganics formation and lignin removal. This model was parameterized against published chemical speciation data from Cl2/ClO2 pulp bleaching experiments and commonly-observed qualitative delignification trends. The parameterized model predicted experimental measurements used in parameterization with accuracy similar or superior to other published bleaching models and realistically depicted global bleaching trends.; A (C+D)EDED bleach plant simulation was developed using the (C+D) Model to predict first-stage processes and literature models to simulate latter stages. This plant simulation predicted design criteria of first-stage chloroorganics formation, chemical cost, brightness, and production rate arising from first-stage design specifications and production and brightness targets. Pareto design investigations identified design configurations yielding concurrent improvements in design criteria. Improved Pareto sets of design alternatives were generated using a Pareto Genetic Algorithm. Pareto sets how design of first-stage processes dictated tradeoffs between criteria.; Final selection of preferred design alternatives within Pareto sets requires relative valuation of objectives to be specified. Valuation is uncertain when comparing incommensurate objectives, such as in environmental valuation. Tradeoff analysis was developed to assist explicit valuation of bleaching design criteria by identifying ranges of objective valuations for which each alternative in a Pareto set was preferred. Potentially-preferred alternatives could then be identified based on robustness against valuation uncertainty.; This research realized a specific application of a general Pareto-based vision of ECDM. This general vision targets three common issues in ECDM: (i) directly addressing all processes influencing criteria during design, (ii) searching for design alternatives that are concurrently-improved in all criteria, and (iii) decoupling search and valuation to facilitate sensitivity analysis of alternative preference against valuation uncertainty. Future applications in other specific design cases may ultimately show the value of this vision in explicitly addressing these three ECDM issues.
机译：开发并实施了帕累托环保设计和制造方法（ECDM），用于设计Cl 2 / ClO 2 软木中第一阶段的有机氯形成和木质素去除工艺。牛皮纸浆漂白。开发了一种新模型“（C + D）模型”，以定量模拟导致氯有机物形成和木质素去除的第一阶段化学反应。该模型根据来自Cl 2 / ClO 2 纸浆漂白实验的公开化学形态数据和常见的定性脱木素趋势进行了参数化。参数化模型预测了用于参数化的实验测量值，其准确性与其他已发布的漂白模型相似或更高，并且现实地描绘了全球漂白趋势。使用（C + D）模型来预测第一阶段的过程，并使用文献模型来模拟后期的（C + D）EDED漂白厂模拟。该工厂模拟预测了第一阶段设计规范以及生产和亮度目标产生的第一阶段有机氯化合物形成的设计标准，化学成本，白度和生产率。帕累托设计调查确定了可同时改进设计标准的设计配置。使用帕累托遗传算法生成了改进的帕累托设计替代方案集。帕累托（Pareto）设置了第一阶段流程的设计如何在标准之间进行权衡。在帕累托集内最终选择首选设计方案需要对目标进行相对评估。比较不相称的目标（例如环境评估）时，评估不确定。开发了权衡分析，以通过确定帕累托集合中每个备选方案均被首选的客观评估范围，来帮助对漂白设计标准进行明确评估。然后，可以基于针对估值不确定性的稳健性来确定潜在的替代方案。这项研究实现了基于Pareto的ECDM通用愿景的特定应用。该总体愿景针对ECDM中的三个常见问题：（i）直接解决设计过程中影响标准的所有过程，（ii）寻找在所有标准中同时改进的设计替代方案，以及（iii）将搜索和评估脱钩以促进敏感性分析对估值不确定性的选择偏好。在其他特定设计案例中的未来应用可能最终显示出此愿景在明确解决这三个ECDM问题中的价值。

著录项

  • 作者

    Clayton, John Morris.;

  • 作者单位

    Georgia Institute of Technology.;

  • 授予单位 Georgia Institute of Technology.;
  • 学科 Engineering Environmental.; Operations Research.; Agriculture Wood Technology.
  • 学位 Ph.D.
  • 年度 2003
  • 页码 448 p.
  • 总页数 448
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 环境污染及其防治;运筹学;森林采运与利用;
  • 关键词

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