Effect of fluid field on the eco-friendly utilization and recycling of CO2 and dyes in the waterless dyeing
Effect of fluid field on the eco-friendly utilization and recycling of CO2 and dyes in the waterless dyeing
复制标题
流场对无水染色中CO2和染料环保利用及回收的影响
DOI：
10.1016/j.jcou.2020.101311
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发表时间：
2020-12
影响因子：
7.7
通讯作者：
Laijiu Zheng
中科院分区：
文献类型：
--
作者：
Li Shengnan;Hu;a Zheng;Su Yaohua;Yuping Zhao;Tingting He;Laijiu Zheng
在超临界无水染色过程中，由于分离器内气体的随机运动，经常会出现染料粉末与二氧化碳分离效果不佳的情况，在最终分离回收阶段容易造成气体再污染。本文设计了一种新型的分离器结构，大大提高了分离效率。用数值模拟的方法研究了改进型分离器内二氧化碳的流动特性。数值结果表明，分离器内存在规则旋转气流、准强迫旋涡和准自由旋涡。在2 0 0 L/h时，分离器的总压降为0.98Pa，远小于原型分离器。改进后的分离器对0.5~2μm染料颗粒的分离效率分别提高了9.96%、8.82%、13.24%和13.24%，表现出更好的分离性能。气体出口处存在的最小循环数为15654。提出了超临界染色中二氧化碳和染料的分离机理。
Abstract During the supercritical waterless dyeing, ineffectual separation of dye powders from carbon dioxide often occurs with the gas random motion in the separator, which easily causes gas recontamination in the final separation and recycling period. In this work, a novel separator structure was designed, which greatly helps to enhance the separation efficiency. The flow field characteristics of carbon dioxide in the improved separator were investigated using numerical simulation. Numerical results showed that the regular rotating airflow, quasi-forced vortex and quasi-free vortex of carbon dioxide appear in the separator vessel. The total pressure loss at 200 L/h is 0.98 Pa, which is much smaller than the prototype separator. Furthermore, the enhanced separation efficiency of 9.96 %, 8.82 %, 13.24 % and 13.24 % is obtained for the dye particle sizes from 0.5 µm to 2 μm in the improved separator, which displays a better separation performance. The minimum cycle number which exists at the gas exit is 15654. Separation mechanism of carbon dioxide and dyes in the the supercritical dyeing was also proposed.
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影响因子：
7.7
作者：
Franco, Paola;Incarnato, Loredana;De Marco, Iolanda
通讯作者：
De Marco, Iolanda
影响因子：
--
作者：
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通讯作者：
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影响因子：
4.5
作者：
Raju Penthala;Rangaraju Satish Kumar;Gisu Heo;Hyorim Kim;I. Y. Lee;Eun Hee Ko;Y. Son
通讯作者：
Raju Penthala;Rangaraju Satish Kumar;Gisu Heo;Hyorim Kim;I. Y. Lee;Eun Hee Ko;Y. Son
影响因子：
7.7
作者：
Bai, Tierong;Kobayashi, Kota;Zheng, Laijiu
通讯作者：
Zheng, Laijiu
DOI：
10.21595/vp.2019.21183
发表时间：
2020-04
期刊：
--
影响因子：
--
作者：
Miaoke Wu;Junchao Mu;L. Zhuang;Y. Kong;Xiaojun Zhou
通讯作者：
Miaoke Wu;Junchao Mu;L. Zhuang;Y. Kong;Xiaojun Zhou