化工技术与开发
化工技術與開髮
화공기술여개발
TECHNOLOGY & DVELOPMENT OF CHEMICAL INDUSTRY
2014年
3期
38-42
,共5页
刘宝勇%魏绪玲%张斌%王良成%杨西
劉寶勇%魏緒玲%張斌%王良成%楊西
류보용%위서령%장빈%왕량성%양서
循环流化床%流体动力学%流域%底部密相区%传热
循環流化床%流體動力學%流域%底部密相區%傳熱
순배류화상%류체동역학%류역%저부밀상구%전열
circulating fluidized bed%hydrodynamics%flow regimes%bottom dense phase zone%heat transfer
循环流态化技术在过程工业中广泛应用。循环流化床底部密相区对整个流化床的流体动力学特性、传热、化学反应及污染物脱除意义重大。本文总结了底部密相区固含率轴向分布和径向分布,概述了底部密相区颗粒速度的径向分布,并详细介绍了底部密相区的流动形态,包括鼓泡流态化、湍动流态化及最新研究结果,同时也描述了循环流化床底部密相区的固体混合及传热。最后,展望了今后的研究方向。
循環流態化技術在過程工業中廣汎應用。循環流化床底部密相區對整箇流化床的流體動力學特性、傳熱、化學反應及汙染物脫除意義重大。本文總結瞭底部密相區固含率軸嚮分佈和徑嚮分佈,概述瞭底部密相區顆粒速度的徑嚮分佈,併詳細介紹瞭底部密相區的流動形態,包括鼓泡流態化、湍動流態化及最新研究結果,同時也描述瞭循環流化床底部密相區的固體混閤及傳熱。最後,展望瞭今後的研究方嚮。
순배류태화기술재과정공업중엄범응용。순배류화상저부밀상구대정개류화상적류체동역학특성、전열、화학반응급오염물탈제의의중대。본문총결료저부밀상구고함솔축향분포화경향분포,개술료저부밀상구과립속도적경향분포,병상세개소료저부밀상구적류동형태,포괄고포류태화、단동류태화급최신연구결과,동시야묘술료순배류화상저부밀상구적고체혼합급전열。최후,전망료금후적연구방향。
Circulating fluidization technology was widely used in process industry. Bottom dense phase zone of a gas-solid circulating fluidized bed was particularly important for hydrodynamics of the whole fluidized bed, heat transfer, chemical reaction and pollutants removal. Axial and radial solid concentration profiles in the bottom dense phase zone were summarized. Radial particle velocity profile in the bottom dense zone was outlined. The flow regimes in the bottom dense phase zone were discussed in detail, included bubbling fluidization, turbulent fluidization and the latest research results. At the same time, solid mixing and heat transfer were also introduced. The future research was forecasted.