• 关键词：分室脉冲引射袋式除尘器  脉冲引射清灰  清灰效率  清灰力  反向风速

• 基金项目：国家高新技术研究发展计划项目(No.2002AA642010)

• 吴岩
• 沈阳农业大学土地与环境学院, 沈阳 110866

• 郝文阁
• 东北大学资源与土木工程学院, 沈阳 110004

• 杜立宇
• 沈阳农业大学土地与环境学院, 沈阳 110866

• 摘要：分室脉冲引射除尘是一种新的除尘方式,它具有在线清灰、结构简单、运行可靠的优点.为了揭示分室脉冲引射袋式除尘器的清灰机理,首先运用可压缩气体绝热流动能量方程推导出喷口的流速和流量,继而根据自由射流理论推导出不同射流断面的平均动能计算公式,最终根据反吹风速与平均动能的关系,得到了反吹风速的计算方法.同时,根据实验模型的测定数据,总结出粉尘清灰力与清灰效率之间的关系式为:Φ=0.79-exp[-B(F-C)^λ].根据上述结果可以确定在粉尘负荷一定的条件下,要达到预定的清灰效率所必需的反吹风速和喷口直径,研究成果可为清灰系统的设计提供理论基础.

• Abstract：Chamber type jet injection is a new type of dust-cleaning, which has many advantages including an on-line cleaning system, simple structure and reliable performance. In order to demonstrate the mechanism of dust-cleaning, the coercible gas heat insulating energy equation was firstly used to deduce the velocity and air mass and then according to free-jet stream theory, the amount of air and average energy of the injecting profile were deduced. Thus the reversal air velocity was obtained. A bag filter model was suggested according to the theoretical investigation. And the relationship between detachment stress and dust-cleaning efficiency was obtained based on experiments. Accordingly, the reverse air velocity and the diameter required for the predetermined dust-cleaning efficiency could be calculated under a certain dust load. The investigation results provided a reference for the design of dust-cleaning systems.

• Key words：chamber type jet injection bag filter  pulse-jet injection dust-cleaning  dust-cleaning efficiency  detachment stress  reverse air velocity

• 
  摘要点击次数： 2197 全文下载次数： 3256