润湿剂促进细颗粒在水汽条件下长大的实验研究

发布时间：2018-08-12 10:52

【摘要】：为了研究润湿剂对细颗粒表面润湿性能的改善效果及其促进细颗粒在水汽条件下的长大特性,对添加润湿剂Tween20作用下的细颗粒表面润湿性能进行了测量,并通过在热水中添加润湿剂研究了Tween20对细颗粒在水汽条件下长大的影响.结果表明:Tween20可以有效改善细颗粒表面的润湿性能并促进细颗粒的长大,同时Tween20的添加方式和添加量对促进细颗粒的长大效果都有一定的影响;Tween20的添加浓度不同对细颗粒的长大促进作用机制也不同,在Tw een20浓度10~30 g/L的范围内,添加润湿剂有利于细颗粒的长大,但当Tw een20的添加浓度超过30 g/L后,添加润湿剂虽然可以提高颗粒长大的最终直径,但是润湿剂的增加并不利于小粒径段(1μm)细颗粒的长大,Tween20的浓度为30 g/L时对细颗粒的长大促进效果最优.因此,在应用润湿剂促进细颗粒物长大并脱除时,适量地添加润湿剂才能达到最佳的促进效果.
[Abstract]:In order to study the effect of wetting agent on the surface wettability of fine particles and promote the growth of fine particles under water vapor condition, the wettability of fine particles under the action of wetting agent Tween20 was measured. The effect of Tween20 on the growth of fine particles under water vapor condition was studied by adding wetting agent in hot water. The results show that: Tween20 can effectively improve the wettability of the surface of fine particles and promote the growth of fine particles. At the same time, the addition mode and amount of Tween20 have certain influence on the effect of promoting the growth of fine particles. The different concentration of Tween20 has different mechanism of promoting the growth of fine particles, in the range of 1030 g / L of Tw een20 concentration, the effect of Tween20 on the growth of fine particles is different. The addition of wetting agent is beneficial to the growth of fine particles, but when the concentration of Tw een20 exceeds 30 g / L, the final diameter of particle growth can be increased by adding wetting agent. However, the increase of wetting agent is not conducive to the growth of small particle size (1 渭 m) and Tween20 concentration is 30 g / L, which is the best to promote the growth of fine particles. Therefore, when wetting agent is used to promote the growth and removal of fine particles, the best effect can be achieved by adding wetting agent properly.
【作者单位】：东南大学能源热转换及其过程测控教育部重点实验室;
【基金】：国家自然科学基金资助项目(51576043) 国家重点基础研究发展计划(973计划)资助项目(2013CB228504) 东南大学优秀博士学位论文培育基金资助项目(YBJJ1607) 江苏省普通高校研究生科研创新计划资助项目(KYLX16_0202)
【分类号】：X701.2

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