CAJ | 학술논문

根据射流流化床内流体流动特性,在流体动力学行为相似的基础上,利用化学动力学软件Chemkin构建了射流床煤气化炉的动力学模型,通过体积放大引起物料停留时间及流体力学相似性的改变,研究其对射流床中物料特性的影响.分析了射流流化床几何相似放大与高径比减小放大对反应器特性的影响,认为等高径比放大停留时间较长,反应器内流体力学相似性较好,在后续工艺对出口组成要求较高时,采用此放大原则能满足要求.
근거사류류화상내류체류동특성,재류체동역학행위상사적기출상,이용화학동역학연건Chemkin구건료사류상매기화로적동역학모형,통과체적방대인기물료정류시간급류체역학상사성적개변,연구기대사류상중물료특성적영향.분석료사류류화상궤하상사방대여고경비감소방대대반응기특성적영향,인위등고경비방대정류시간교장,반응기내류체역학상사성교호,재후속공예대출구조성요구교고시,채용차방대원칙능만족요구.
To find out the volume effects during the coal gasifier enlarging,a kinetic model of jetting fluidized bed is built based on the hydrodynamic likeness by Chemldn software package.Two kinds of reactor enlarging,constant slenderness ratio and similar reactor hydrodynamic,are analyzed to compare the features of feeder material,residence time of coal particle and syngas composition.The results show that constant slenderness ratio enlarged reactor has longer residence time and better dynamical similarity,meanwhile gives the outlet syngas composition in good agreement with original reactor.