Study on the Pulse‐Jet Cleaning Process for a Filter Cartridge and Its Optimal Designs on the Induced Nozzle

ABSTRACT Pulse‐jet cleaning technology is commonly used during the cleaning process of cartridge dust collectors. Understanding the changes in the airflow field and the transport laws of dust particles during the pulse‐jet cleaning process is important to improve the cleaning efficiency. In the present study, a single cartridge dust collector was selected as the research object. The numerical simulations on the pulse‐jet cleaning process of the cartridge were carried out by the CFD‐DPM method. The distributions and variations of the airflow and the dust particles were investigated during the pulse‐jet cleaning process for a filter cartridge. In order to optimize the flow field and improve the cleaning efficiency, new types of diffusers were designed, and simulations on the pulse‐jet cleaning process were conducted. The distribution of the jet airflow, the pressure changes on the side walls of the filter cartridge, and the dust dispersion under the four conditions for the filter cartridge were obtained. It was found that the existence of the diffuser is helpful to broaden the coverage area of the pulse jet airflow, which is conducive to enhancing the effectiveness of the cleaning process. For the two‐layer perforated diffuser, the dust concentration on the filter cartridge diminishes at the most rapid rate, from about 0.25 to 0.01 kg/m 3 , which is twice that of the condition without a diffuser. The present study provides a theoretical basis for the application of diffusers in the cleaning process and offers certain guidance for enhancing the cleaning efficiency of the filter cartridge dust collectors.