喷雾闪蒸制备微纳米颗粒  

Spray flash evaporation preparation of micro/nanoparticles

作　　者：蔡本安 张建新 龙城君 杜乔琛 车勋建 张义迎 蔡伟华 CAI Ben’an;ZHANG Jianxin;LONG Chengjun;DU Qiaochen;CHE Xunjian;ZHANG Yiying;CAI Weihua(School of Energy and Power Engineering,Northeast Electric Power University,Jilin 132012,Jilin,China;Beijing Jingneng Power Co.,Ltd.,Zhuozhou 072750,Hebei,China;China Energy Group Zhunge’er Energy Co.,Ltd.,Ordos 010300,Inner Mongolia,China;Xi’an Modern Chemistry Research Institute,Xi’an 710065,Shaanxi,China)

机构地区：[1]东北电力大学能源与动力工程学院,吉林吉林132012 [2]北京京能电力股份有限公司,河北涿州072750 [3]国能准能集团有限责任公司,内蒙古鄂尔多斯010300 [4]西安近代化学研究所,陕西西安710065

出　　处：《化工学报》2025年第3期1334-1345,共12页CIESC Journal

基　　金：国家自然科学基金项目(52206194);吉林省自然科学基金项目(20230101342JC)。

摘　　要：设计并搭建了一套通过喷雾闪蒸方法制备微纳米颗粒的实验装置,将含有有机溶质的溶液喷入真空腔室内进行闪蒸,以得到相应的微纳米有机颗粒。实验涵盖了3.0~4.5 MPa的初始压力、130~200℃的初始温度以及三组不同直径的喷嘴和四种有机物溶质。使用0.10 mm的喷嘴,制得的对甲苯磺酰胺颗粒尺寸分布在0~30μm。提高喷雾初始温度与压力可使小尺寸颗粒占比提高,平均直径减小,这对颗粒的细化作用十分明显。当增大喷嘴直径时,雾化效果变差对闪蒸的抑制将会增大颗粒的尺寸和不均匀性,因此使用小口径喷嘴能够获得更小、分布更集中的颗粒。而不同有机溶质制得的颗粒形态与大小均有不同,但颗粒尺寸都分布在40μm以内,表明本实验装置具有一定的普适性。This study presents the design and construction of an experimental device for the preparation of micro/nanoparticles through a spray flash evaporation.Solutions containing organic solutes are sprayed into a vacuum flash evaporation chamber to obtain the organic micro/nanoparticles.The experiment included an initial pressure of 3.0—4.5 MPa,an initial temperature of 130—200℃,three sets of nozzles with different diameters,and four sets of organic solutes.Using the 0.10 mm nozzle,the particle size distribution of p-toluene sulfonamide ranges from 0 to 30μm.When the initial conditions are increased to 4.5 MPa and 170℃,the proportion of particles smaller than 6μm can be increased to 62%and 75%,respectively.This indicates that increasing the initial conditions has a significant refinement effect on the particles.In addition,increasing the nozzle size will further increase the particle size and non-uniformity due to the suppression of flash evaporation caused by the deterioration of atomization effect.Therefore,the small diameter nozzle can produce smaller,more concentrated,and uniformly distributed micro/nanoparticles.The particle morphology and size of different organic solutes are different,but the particle size is distributed within 40μm,indicating that this experimental device has a certain universality.

关 键 词：喷雾闪蒸 有机溶质 制备 微纳米颗粒 粒子形成 粒度分布 

分 类 号：TK124[动力工程及工程热物理—工程热物理]