The filter cartridge dust collector appeared in Japan, Europe, and America as early as the 1970s, with advantages such as small size, low investment, and easy maintenance. However, due to its small equipment capacity, it is difficult to combine into high air volume equipment, low filtration speed, and narrow application range. It is only used in industries such as grain and welding, so it has not been widely promoted. In recent years, with the continuous development of new materials, represented by companies in Japan and the United States, the structure and filter material of dust collectors have been improved, making filter cartridge dust collectors widely used in industries such as cement, steel, electricity, food, metallurgy, and chemical industry. The overall capacity has increased several times, becoming a filter area>; The 2000m2 large dust collector (GB6719-86 class) is a solution to the problems of difficult dust collection, high filtration wind speed, poor dust cleaning effect, easy wear and leakage of filter bags, and high operating costs of traditional dust collectors. Compared with various bag and electrostatic dust collectors on the market, it has the characteristics of large filtration area, low pressure difference, low emissions, small volume, and long service life, and has become a new direction for the development of industrial dust collectors.

Working principle

After the dusty gas enters the dust collector hopper, due to the sudden expansion of the airflow cross-section and the effect of the airflow distribution plate, some coarse particles in the airflow settle in the hopper under the action of dynamic and inertial forces; After the dust particles with fine particle size and low density enter the dust filter chamber, they deposit on the surface of the filter material through a combination of Brownian diffusion and screening effects. The purified gas enters the clean air chamber and is discharged through the exhaust pipe and fan.

The resistance of the filter cartridge dust collector increases with the increase of the thickness of the dust layer on the surface of the filter material. Clean the dust when the resistance reaches a certain specified value. At this time, the PLC program controls the opening and closing of the pulse valve. Firstly, the lifting valve of the first chamber is closed to cut off the filtered airflow. Then, the electromagnetic pulse valve is opened, and the compressed air expands in the upper box for a short period of time, flowing into the filter cartridge, causing the filter cartridge to expand and deform, generating vibration. Under the action of the reverse airflow brush, the dust attached to the outer surface of the filter bag is peeled off and falls into the ash hopper. After the dust cleaning is completed, the electromagnetic pulse valve closes, the lift valve opens, and the chamber returns to the filtering state. The cleaning process is carried out sequentially in each room, with one cleaning cycle starting from the beginning of the cleaning process and ending with the next cleaning process. The fallen dust falls into the ash hopper and is discharged through the ash removal valve.