首页> 外文会议>International Symposium on Industrial Crystallization >Wastewater treatment by freeze concentration: influence of velocity profile on crystal growth and impurities incorporation
【24h】

Wastewater treatment by freeze concentration: influence of velocity profile on crystal growth and impurities incorporation

机译:冷冻浓度处理废水:速度谱对晶体生长和杂质掺入的影响

获取原文

摘要

Freeze wastewater treatment is a hopeful process not enough explored [1]. Indeed, recent studies applying freezing technology for seawater desalination [2, 3] showed water of high purity could be recovered provided the process was conducted with precise control of the operating conditions. The implementation of a freezing step in wastewater treatment presents a double environmental benefit: it permits to (i) concentrate pollutants in wastewater, allowing a post treatment by advanced oxidation process (AOP) or a strong reduction of the energy consumption by incineration and (ii) to recover aqueous effluent in agreement with standards. Two kinds of freezing process exist, in suspension or on cold surface. The second technology has retained our attention because the separation between ice and concentrated wastewater is easier and does not require other unit operation like washing column. This work aims at developing and optimizing a pilot crystallizer of wastewater treatment on a cooled wall, with the help of numerical and experimental results. Experiments were performed with acetone as contaminant compound model. To understand the thermophysical phenomena in order to precisely operate the process and to secure the scale up, a numerical model with COMSOL multiphysics has been developed to simulate the freezing process. The ultimate goal is to bring out the influence of velocity profile on crystal growth and impurities incorporation. Based on previous work, some expected results have to be confirmed. In this paper a presentation of the system water/acetone and some numerical and experimental results are presented.
机译:冻结废水处理是一个有希望的过程,不够探索[1]。实际上,最近的研究适用于海水脱盐的冻结技术[2,3]显示出高纯度的水,只要通过精确控制操作条件进行该方法。在废水处理中的冷冻步骤的实施提出了双重环境效益:它允许(i)浓缩废水中的污染物,允许通过焚烧的能量消耗或强大降低能源消耗和(ii )以与标准一致地回收含水流出物。存在两种冷冻过程,悬浮或冷表面。第二种技术保留了我们的注意,因为冰和浓缩废水之间的分离更容易,并且不需要其他单位操作,如洗涤柱。这项工作旨在在数值和实验结果的帮助下开发和优化在冷却墙上的废水处理的飞行员结晶器。用丙酮作为污染物复合模型进行实验。为了了解热物理现象,以精确地操作该过程并确保扩展,已经开发了一种具有COMSOL多体学的数值模型来模拟冷冻过程。最终目标是在晶体谱对晶体生长和杂质掺入的影响。根据以前的工作,必须确认一些预期的结果。本文提出了系统水/丙酮的介绍和一些数值和实验结果。

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