Nitrogen pulse jet cleaning of the pleated filter cartridge clogged with adhesive hygroscopic dusts

• Published in: Process safety and environmental protection Vol. 147; pp. 430 - 438
• Main Authors: He, Chunhong, Yan, Cuiping, Tang, Cuiying, Huang, Mei, Ren, Ling, Zhang, Mingxing
• Format: Journal Article
• Language: English
• Published: Rugby Elsevier B.V 01.03.2021; Elsevier Science Ltd
• Subjects: Adhesive dust; Adhesive strength; Adhesives; Air injection; Air temperature; Cartridges; Cleaning; Compressed air; Dry gas source; Dust; Dust filters; Feasibility; Gas injection; Hygroscopicity; Industrial production; Injection; Low temperature; Moisture content; Nitrogen; Nozzles; Particulate emissions; Particulate matter; Pleated filter cartridge; Polyacrylamide; Polyacrylamides dust peeling off; Pressure drop; Pulse jet cleaning; Regeneration; Water content; Water purification; Pleated filter cartridge; Adhesive dust; Polyacrylamides dust peeling off; Pulse jet cleaning; Dry gas source
• ISSN: 0957-5820; 1744-3598
• DOI: 10.1016/j.psep.2020.08.045

Article introduction: The cleaning limitation of the pleated cartilage filters for collecting adhesive dust. we have proposed a method of using a dry gas injection to collect adhesive dust [Display omitted] The pleated filter cartridges are widely used in industrial production to control particulate emissions and recover valuable particulate matter, where pulse jet cleaning is a major method for filter regeneration. However, for strong hygroscopic and adhesive dust such as Polyacrylamides (PAM), during pulse-jet cleaning the compressed air forms a low temperature zone at the nozzle and will release water to the environment, causing the particles to adhere on the filter after absorbing moisture, resulting in ineffective filter regeneration. Therefore, a higher cleaning pressure or other methods are required to clean the filter surface. In this article, we have proposed a method to collect adhesive dust using dry gas injection and verified its feasibility through pilot experiments. The compressed air injection source was replaced with nitrogen, the curve of system pressure drop shows that nitrogen has good performance in the peeling of adhesive dust from the surface of the pleated filter cartridge. This highlights the effect of the moisture content in the cleaning compressed air on the regeneration of filters clogged with adhesive hygroscopic particles. Therefore, the feasibility of the nitrogen injection was validated, which provides a basis for the future systematic research of industry to collect adhesive dust.