陶瓷过滤器脉冲喷吹清灰系统动态模型

针对在使用刚性陶瓷过滤器时难以解决其脉冲喷吹清灰的问题 ,利用气体动力学和流体瞬变理论建立了脉冲喷吹系统内气体流动的动态仿真模型 ,从而解决了由于实际管路内气体为非稳态流动而按稳态方法分析其流场会产生较大误差的问题。将由模型计算出的喷吹气体质量流量与热线风速仪的测定结果进行了对比 ,确定出脉冲阀的时间特性参数。利用该模型分析了储气罐容积、管线长度、喷嘴直径等参数对喷吹气体流动特性的影响。结果表明 ,该模型可用于分析脉冲喷吹系统的结构参数和流动参数对喷吹清灰性能的影响 ,且此模型的建立对气体过滤器脉冲喷吹系统的优化设计具有参考价值。

Numerical simulation model for transient flow in pulse cleaning system of ceramic filter

A dynamic model for pulse cleaning system consisting of pulse gas reservoir, nozzle, solenoid valve and connecting pipelines was derived on the basis of flow transient theory and gas thermodynamics. The model was used to simulate pulse-jet consumption and mass flow rate versus time. The simulation results of mass flow rate are consistent with the experimental data obtained using hot-wire anemometer. The effects of pulse nozzle diameter,compressed gas reservoir volume, interconnecting pipeline length on the performance of pulse-jet cleaning system were analyzed. It is shown that the dynamic model can be well applied to optimize and design the pulse cleaning system of pilot plants.