The working principle of a filter cartridge dust collector: The dusty airflow enters the dust collector box from the inlet. Generally speaking, the gas enters from the outside of the filter cartridge. The larger particles of dust, due to gravity, do not pass through the filter cartridge and directly settle into the ash hopper, or are impacted by inertial forces and collide with the side walls of the box, settling down along the side walls. Small particles of dust pass through the cylinder with the airflow, and the dust particles in the gas are filtered on the surface of the filter material. Clean gas is discharged from the outlet. The dust accumulates more and more on the surface of the filter cartridge, and the resistance also increases. When it reaches the set value or set time, the pulse valve opens, and the compressed gas will blow towards the center of the filter cartridge. At the same time, the induced air will also enhance the dust cleaning effect. The instantaneous high-pressure gas will blow off the dust on the surface of the filter cartridge, and the dust will be cleaned by pulse cleaning according to the set sequence, so that the system can resume low resistance operation. The composition of a filter cartridge dust collector: The filter cartridge dust collector mainly consists of three parts: the box, the filter cartridge, and the dust cleaning system. 1. The casing is the outer shell of the entire dust collector, including the air box and ash hopper. The gas box mainly provides the required dust removal space, which is conducive to the reasonable distribution of the flow field, while the ash hopper collects and filters the materials; 2. The filter cartridge is composed of an outer layer, an inner layer, and a middle layer. Both the inner and outer layers are made of metal mesh (or hard plastic mesh), with a pleated filter material in the middle. The characteristic of filter media for filter cartridges is to adhere a layer of sub micron ultra-thin fibers to general filter media. The fibers on this adhesion layer are arranged very tightly, with a gap of 0.12-0.6 μ m. Due to the use of dense folding, the filtration area is greatly increased. The filtering area is a prominent feature of the filter cartridge; 3. The dust cleaning system mainly includes spray pipes, pulse valves, air bags, etc. When the surface area of the filter cartridge reaches the thickness of ash, it is necessary to clean the ash. The dusty gas flows through the filter cartridge for filtration and is then discharged. When the resistance of the dust collector reaches the set pressure difference or time value, the corresponding solenoid valve is controlled by the pressure difference controller or time controller to open the pulse valve in the closed state. Compressed air is directly sprayed into the center of the filter cartridge for pulse cleaning. The use of filter cartridge dust collectors: China, especially in the eastern region, is severely polluted, and the development of industry has brought about severe air pollution, resulting in over a thousand premature deaths per square kilometer due to air quality issues. The problem of air pollution in our country is also due to insufficient efforts in air governance in the past. With the strengthening of our country's economy, our total output has ranked among the world's top. However, our country is still in the primary stage of socialism, and we still need to allocate limited funds reasonably into economic development and infrastructure construction. Therefore, overall, China's investment in environmental protection is far from enough, resulting in only a limited degree of containment of environmental pollution. However, the environment in China is still deteriorating. The main performance indicators of the filter cartridge dust collector are that the pulse airflow is directly sprayed into the interior of the filter cartridge without passing through the Venturi. This will cause negative pressure on one end (upper part) of the filter cartridge near the pulse valve, while the other end (lower part) of the filter cartridge will experience pressure. This will result in different cleaning of the upper and lower parts of the filter cartridge, which may shorten its service life and prevent the equipment from achieving cleaning. For this purpose, a filter cartridge with a Venturi nozzle can be installed at the outlet of the pulse valve or on the pulse spray pipe. Improve the distribution of injection pressure to a more uniform full filter height positive pressure injection. Dust accumulation in the folding seams of the filter cartridge will make cleaning difficult. Therefore, filter cartridges with large folding areas (each with a filtration area of 20-22m2) are generally only suitable for applications with lower inlet concentrations. Compare commonly used filter cartridge sizes and filtration area. The gas distribution box of the pulse blowing device of the filter cartridge dust collector shall comply with the provisions of JB/T10191-2000. Clean airflow should be free of water, oil, and dust. Under specified conditions, the pulse valve and its interface should have no air leakage and be able to open and close normally and work properly. The pulse controller should work accurately, and its injection time and interval can be adjusted within a range. When installing the induction spray device in conjunction with the spray pipe. The nozzle of the induction spray device should be coaxial with the spray hole on the spray pipe and maintain the same verticality as the nozzle, with a deviation of less than 2mm.
