颗粒层除尘器过滤和清灰方式的优化  

Optimization of the Filtering and Deashing Modes for Granular-layer Dust Precipitators

作　　者：王助良[1] 刘晓航[1] 杜滨[1] 

机构地区：[1]江苏大学能源与动力工程学院,江苏镇江212013

出　　处：《热能动力工程》2007年第3期270-273,283,共5页Journal of Engineering for Thermal Energy and Power

基　　金：江苏省高校自然科学基金资助项目(03KJA610021)

摘　　要：分析了移动床颗粒层除尘器存在颗粒层间隙增大和颗粒错位等影响除尘性能的问题,并优化出能克服这些问题的新型结构和过滤方式的颗粒层除尘器;介绍了新型颗粒层除尘器的结构和特点,特别是组合流化床清灰机构能实现颗粒层的快速清灰;建立了除尘器床层压降的数学模型,通过实验摸索出颗粒层流化清灰规律和除尘器的过滤性能。理论和实践表明,新型颗粒层除尘器的除尘性能优于其它颗粒层除尘器,能实现了除尘和清灰一体化,清灰过程更简便。Analyzed were the issues affecting the dust removal performance of moving-bed granular-layer dust precipitators due to an increase in clearance between granular layers and also granular particle dislocation etc. Through an optimization effort a granular-layer dust precipitator with a new type of structure and filtering method was created to solve the above issues. Its structure and specific features are described, especially a built-up fluidized bed dust removal mechanism, which can accomplish a quick dust removal from the granular layers. A mathematical model featuring the pressure drop of the dust precipitator bed layer has been established. By way of experiments, the authors have identified the regularity of dust removal from a granular fluidized layer and the filtering performance of the precipitator. Both theoretical research and practice have indicated that the new type of granular-layer precipitators has a better dust removal performance than other granular-layer ones, making it possible to realize an integration of dust removal and deashing as well as to simplify the dust removal process.

关 键 词：颗粒层除尘器 清灰 固定床 移动床 流化床 

分 类 号：TK284.5[动力工程及工程热物理—动力机械及工程]