权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

Study of high-concentration production method with freezing of droplet fallen on a plate in a cold room

冷室平板液滴冷冻高浓度生产方法研究

基本信息

批准号：
17560179
负责人：
HIRATA Testuo
金额：
$ 2.02万
依托单位：
Shinshu University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2005
资助国家：
日本
起止时间：
2005 至 2007
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-17560179/
关键词：
Ice formation Concentration Ice stalagmite Droplet High concentration Solution

项目摘要

In this rematch, freeze-concentration of aqueous solution with using ice-stalagmite is examined The S stalagmite is formed on a bottom of a cold room when a water droplet falls in. High concentration of aqueous solution is obtained with only a time of freezing by this method Four research tasks are schemed and the following results are obtained:1. Ice formation phenomena of water droplet: Ice formation phenomena of water droplet Men in a cold room were observed to examine the ice shape pattern of ice-stalagmite. It was found that four patterns of ice shape were observed due to experimental conditions, which were column, spiral, cone and cave-in shapes.2. Ice formation phenomena of aqueous-solution droplet; Ice formation phenomena of aqueous solution (ethylene glycol water solution) were observed to examine the ice formation characteristics. The observed ice-shape type were the almost same as these observed by water droplet It was also found that a piece of ice should be boated on the freezing region to avoid super000lin g of the droplet.3. Freeze-concentration phenomena with ice-stalagmite formation: It was found that aqueous solution was concentrated with ice formation and the concentrated liquid collected around the base of the ice-stalagmite. The freezing temperature of the concentrated liquid has same value as the cold room temperature, which means high concentration can be obtained with only one time operation of freezing by this ice-stalagmite method On the other hand, it was found that the concentration of the ice-stalagmite becomes thinner which means purification of water is possible by this method.4. Empirical equation fm. freeze-concentration: The experimental data were arranged in consideration of the analytical model of the freeze-concentration phenomena. Consequently, the concentration characteristics with using ice-stalagmite were clarified and the possibility of application of the present method was shown.

本文研究了冰石笋对水溶液的冷冻浓缩。当福尔斯滴入冰石笋时，冰石笋在冷室底部形成。该方法只需一次冷冻就可得到高浓度的水溶液。水滴的结冰现象：水滴的结冰现象在寒冷的房间里观察了冰石笋的冰形图案。实验结果表明，在不同的实验条件下，冰的形状可以分为圆柱形、螺旋形、圆锥形和塌陷形四种.水溶液液滴的成冰现象;观察水溶液（乙二醇水溶液）的成冰现象，考察其成冰特性。观察到的冰的形状与水滴观察到的冰的形状基本一致，同时发现，为避免水滴的超000度漂移，应在结冰区放置一块冰.冰石笋形成时的冻结浓缩现象：发现水溶液随着冰的形成而浓缩，浓缩液聚集在冰石笋底部周围。浓缩液的冻结温度与冷室温度相同，这意味着通过该冰石笋法仅进行一次冻结操作就可以获得高浓度。另一方面，发现冰石笋的浓度变薄，这意味着通过该方法可以净化水。经验公式fm.冷冻浓缩：考虑到冷冻浓缩现象的分析模型，对实验数据进行了整理。从而阐明了冰石笋的浓缩特性，表明了该方法应用的可能性。