CAJ | 학술논문

乙烯气相聚合流化床反应器广泛用于聚乙烯的生产，针对该体系建立了计算流体力学模型，用以分析流化床内的流动特性。文章进行了灵敏度分析，确定网格数量为53732能够满足计算需求，并且比较了Wen & Yu 模型和Gidaspow 模型2种曳力模型的计算结果，从床层膨胀比和床层压降上确定采用Wen & Yu模型更加适合该体系。将模拟得到的床层膨胀比、床层压降和临界流化速度3个参数与经验公式计算值继续比较，二者吻合，所建模型为后续流化床流动特性的研究打下良好的基础。
을희기상취합류화상반응기엄범용우취을희적생산，침대해체계건립료계산류체역학모형，용이분석류화상내적류동특성。문장진행료령민도분석，학정망격수량위53732능구만족계산수구，병차비교료Wen & Yu 모형화Gidaspow 모형2충예력모형적계산결과，종상층팽창비화상층압강상학정채용Wen & Yu모형경가괄합해체계。장모의득도적상층팽창비、상층압강화림계류화속도3개삼수여경험공식계산치계속비교，이자문합，소건모형위후속류화상류동특성적연구타하량호적기출。
Gas phase fluidizedbed reactor is widely used in polyethylene production. In this paper, a CFD model for a gas phase polymerization system was established to analyze the folw characteristics in a fluidizedbed reactor. The sensetivity analysis on the grid number was carried out and the mesh with a number of 53732 girds was considered to be adequat for the simulation. The effect of Wen & Yu drag model and Gidasspow drag model on the results were compared and the former predicted the bed expansion ratio and and pressure drop more reasonable. The simulated bed expansion ratio, pressure drop and the minimum fluidization velocity reasonably agreed with the results from classical equations. The established CFD model lay a fundation for the future study on the fluiddizedbed reactor.