CAJ | 학술논문

改进Intermig桨已经被应用到国内的种分设备中，其在促进了氧化铝颗粒的悬浮和混合的同时，搅拌功率也得到大幅度降低。采用计算流体力学和水模型实验相结合的方法研究改进Intermig桨固液搅拌体系中的流场、固含、云高度、临界悬浮转速以及功率消耗情况。与标准的Intermig桨相比，改进后的Intermig桨改善了槽内循环流的发展，促进了颗粒的悬浮，功率消耗也得到幅度降低。桨叶离地距离越低越有利于颗粒的悬浮与分散，并采用功率判据得到了颗粒悬浮的临界搅拌转速，同时采用数值模拟预测的结果与实验结果吻合较好。
개진Intermig장이경피응용도국내적충분설비중，기재촉진료양화려과립적현부화혼합적동시，교반공솔야득도대폭도강저。채용계산류체역학화수모형실험상결합적방법연구개진Intermig장고액교반체계중적류장、고함、운고도、림계현부전속이급공솔소모정황。여표준적Intermig장상비，개진후적Intermig장개선료조내순배류적발전，촉진료과립적현부，공솔소모야득도폭도강저。장협리지거리월저월유리우과립적현부여분산，병채용공솔판거득도료과립현부적림계교반전속，동시채용수치모의예측적결과여실험결과문합교호。
The improved Intermig impeller has been used in the seed precipitation tank in China, which could enhance the mixing and suspension of Al(OH)3 particles and the power consumption declined largely. The flow field, solids hold-up, cloud height, just off-bottom speed and power consumptions were investigated in solid-liquid mixing system with this new type of impeller by CFD and water experiment methods. Compared with the standard Intermig impeller, the improved one coupled with specially sloped baffles could promote the fluid circulation, create better solids suspension and consume less power. Besides lower impeller off-bottom clearance is good for solid suspension and distribution. The just-off-bottom speed was also determined by a power number criterion. Meanwhile, the predicted results were in good agreement with the experimental data.