Abstract: Filter cartridge cleaning is the key process in the operation of the dust collector.Pulsed-jet reverse airflow cleaning technology,as the most widely used cleaning technology,has the advantages of simple operated,airflow uninterrupted and so on.In recent years,the proportion of pulse-jet cleaning filter cartridge dust collectors in industry is gradually increased for its technology advantages and related research is developed rapidly.Researchers have extensively explored the pulse-jet cleaning technology of filter cartridges using theoretical analysis,experimental research and numerical simulation,and have made a lot of useful progress.This paper describes the basic principle of dust filter cartridge pulse-jet cleaning technology,the adhesion of dust cake,and the evaluation method of dust removal effect.Main factors affecting dust cleaning performance of the filter cartridge are analyzed,main problems are outlined,the latest progress of improvement measures to improve dust removal uniformity are summarized,and the development direction of dust filter cartridge pulse-jet cleaning technology are pointed out.The research shows that the theory of pulse jet pressure is generally adopted to understand the mechanism and the static pressure on the filter wall is taken as the jetting index.The evaluation of cleaning effect is mainly based on the change of filtration resistance and fallen dust mass.The jet deviation,patchy cleaning and dust re-deposition are common problems faced by the filter cartridge,of which the patchy cleaning is the focus of current research.The main measures to improve the dust cleaning performance of the filter cartridge are nozzle designing,venturi tube addition,filter cartridge structure optimization,jet strategy improvement and so on.Among them,opposing pulse jet cleaning technology breaks through the limitation of single-point source type and has great potential to overcome the patchy cleaning problem.Key points for future research including theory analysis of pulse jet filter cylinder cleaning,structure design of pulse jet cleaning and parameter optimization,regular analysis of dust cake releasing and migration,and establishment of specification for pulse jet system and parameter.The research results can provide reference for the development and engineering application of pulse-jet cleaning technology for dust filter cartridge.

Key words: dust,filter cartridge,pulse jet,patchy cleaning,nozzle,airflow misalignment