A filter cartridge dust collector is composed of a filter cartridge as the filtering element or a dust collector using pulse blowing. The filter cartridge dust collector can be divided into inclined insertion type, side installation type, lifting type, and upper installation type according to the installation method. Filter cartridge dust collectors can be divided into long fiber polyester filter cartridge dust collectors, composite fiber filter cartridge dust collectors, anti-static filter cartridge dust collectors, flame-retardant filter cartridge dust collectors, membrane filter cartridge dust collectors, nano filter cartridge dust collectors, etc. according to the filter cartridge material.
The filter cartridge dust collector has the advantages of small size, high efficiency, 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 for many years. In recent years, with the continuous development of new technologies and materials, the structure and filter media of dust collectors have been improved, making filter cartridge dust collectors applied in industrial fields such as cement, steel, electricity, food, metallurgy, and chemical industry. The overall capacity has increased several times, becoming large-scale dust collectors with a filtration area of>2000m ². It is a solution to solve the problems of traditional dust collectors' difficulty in collecting ultrafine dust, high filtration wind speed, poor dust cleaning effect, easy wear and leakage of filter bags, and high operating costs. Compared with various bag and electrostatic dust collectors on the market, it has a large effective filtration area, low pressure difference, and low emission
The structure of a filter cartridge dust collector consists of an inlet duct, an exhaust duct, a box, an ash hopper, a cleaning device, a guide device, an airflow distribution plate, a filter cartridge, and an electrical control device, similar to the structure of an air box pulse bag dust collector.
The arrangement of the filter cartridge in the dust collector is very important. It can be vertically arranged on the box flower board or tilted on the flower board. From the perspective of dust cleaning effect, vertical arrangement is more reasonable. The lower part of the flower board is the filtering chamber, and the upper part is the pulse chamber of the air box. An airflow distribution plate is installed at the inlet of the dust collector.
Select technology
1. Dust cleaning device
Traditional filter cartridge dust collectors have two cleaning methods, one is high-pressure air flow back blowing, and the other is pulse air flow blowing. Practice has shown that the former has the advantage of uniform air flow, but the disadvantage is high air consumption; The advantage of the latter is low gas consumption, but the disadvantage is weak airflow. Two improvements can be made for this: on the one hand, a guide device can be added to the pulse blowing tube to enhance the airflow induction effect, and on the other hand, the upper guide duct of the filter cartridge can be removed to allow both pulse airflow and induced airflow to fully enter the filter cartridge at the same time. After this improvement, the air consumption is reduced, the airflow is uniform, and the dust cleaning effect is good. According to calculations, the dust cleaning airflow flow rate after the technical improvement is 3-5 times that of the pulse airflow.
2. Gas distribution board
The airflow distribution of the filter cartridge dust collector is very important, and it is necessary to consider how to avoid high wear areas on the filter material caused by high wind speed at the equipment inlet. The airflow distribution plate is required for filter cartridge dust collectors, and the airflow distribution must be very stable and uniform. It is beneficial for the increase of airflow and the decrease of dust, and the opening rate of the airflow distribution plate is 35%. According to the calculation, the resistance coefficient is less than 2, indicating that the porous airflow distribution plate can meet the requirements of the filter cartridge dust collector when the airflow velocity is less than 0.8m
