气箱式脉冲喷吹袋式除尘器的清灰机理

为了揭示气箱式脉冲喷吹袋式除尘器的清灰机理,应用空气热力学关于开口系统绝热能量方程,对气箱式脉冲袋式除尘器在脉冲喷吹过程中滤袋表面的反向风速数学表达式进行了理论推导.据此可以得出反向风速形成的对滤袋表面粉尘层的剥离力;根据袋式除尘器实验模型实验测定的数据,总结出剥离力与粉尘剥离率之间的关系式.根据上述结果可以确定在布袋粉尘负荷一定的条件下,要达到预定的剥离率所必须的反向风速和喷吹气体流量.研究成果为清灰系统的设计提供了理论基础.

Pulsate Dust-Purging Mechanism of Plenum-Type Bag Filter

To reveal the pulsate dust-purging mechanism of plenum-type bag filter,the adiabatic energy equation based on aerodynamics is applied to the venting system,so as to drive theoretically the reverse air speed expression of bag filter surface in pulsate dust-purging process.Then,the removing force due to reverse airflow,which is acting on the dust layer on bag filter surface,can be obtained. And the relationship between the removing force and dust removing rate is given to the data resulting from the test of bag filter model.In this way the reverse air speed and air flow rate for purging are available to obtain,which are both necessary to the preset removing rate under conditions that the dust burden of bag filter is constant.The investigation results provide a reference necessary to the design of dust-purging system.