Working Principle Of A Single-Unit Dust Collector

The entire dust collection and filtration process is the result of a combination of effects including gravity, inertia, collision, electrostatic adsorption, and sieving. The working principle of a single-unit dust collector can be divided into four continuous stages. The first stage is the dust-laden gas inlet and pre-separation stage. The dust-laden gas enters the dust collector housing through the inlet at the bottom of the equipment and then enters the ash hopper area. The sudden decrease in gas velocity and gravity cause coarse dust particles to settle. The second stage is the filter bag filtration and purification stage. When the dust-laden gas passes through the filter bags, the microporous structure on the filter material surface intercepts fine dust, forming an initial dust layer. The purified gas then passes through the filter bags and enters the clean air chamber for discharge. The filtration velocity is typically controlled at 0.8-1.2 m/min. The third stage is the pulse-jet cleaning stage. When the filter bag resistance reaches 1200-1500 Pa, the cleaning system is activated. Compressed air is injected through the pulse valve, causing the filter bags to expand and contract, peeling off the dust accumulated on the surface. The pulse pressure is 0.5-0.7 MPa. The fourth stage is the dust collection and emission stage. The detached dust falls into the ash hopper and is discharged through an ash discharge device such as an airlock. By precisely controlling the key parameters of each stage, such as the airflow velocity in the pre-separation stage, the wind speed in the filtration stage, the blowing pressure and cycle in the dust cleaning stage, and the unloading frequency in the ash discharge stage, the efficient and stable operation of a single dust collector can be achieved.