CAJ | 학술논문

传统超临界萃取釜的不足主要表现在：萃取筐占据筒体容积,造成萃取釜空间利用率降低;萃取筐与筒体内壁存在间隙,造成传质、传热效果不良。本文对萃取釜进行结构改造,采用双封头结构,封头上设置筛网,采用径向进气方式。利用ANSYS Workbench及FLUENT软件,模拟了改进结构在空载和装料两种情况下的温度场和流场,对比分析了两种情况下的温度场和流场。比较结果说明,改进后的萃取釜结构不仅提高了萃取釜的空间利用率,而且改善了萃取釜的温度场均匀性,萃取釜的流场均匀性也有提高。
전통초림계췌취부적불족주요표현재：췌취광점거통체용적,조성췌취부공간이용솔강저;췌취광여통체내벽존재간극,조성전질、전열효과불량。본문대췌취부진행결구개조,채용쌍봉두결구,봉두상설치사망,채용경향진기방식。이용ANSYS Workbench급FLUENT연건,모의료개진결구재공재화장료량충정황하적온도장화류장,대비분석료량충정황하적온도장화류장。비교결과설명,개진후적췌취부결구불부제고료췌취부적공간이용솔,이차개선료췌취부적온도장균균성,췌취부적류장균균성야유제고。
The shortcomings of the traditional supercritical carbon dioxide extractor are as follows： low space utilization ratio of the extractor owing to the extraction basket occupying the cylinder volume;bad mass transfer and heat transfer owing to the gap between extraction basket and cylinder wall.Aiming at the shortcomings,the extractor structure was improved.Double head structure and radial inlet way were adopted,and a filter screen was set up on the head.Based on ANSYS Workbench and FLUENT,the flow field and temperature field of the improved extractor was simulated at both load and zero load.The simulation results were compared in different situations.The results showed that the improved structure promoted the space utilization ratio and improved the uniformity of flow field and temperature field.