Factors Affecting the Efficiency of Cyclone Dust Collector

The working principle of the cyclone dust collector is that after the dust-containing airflow enters the dust collector through the tangential inlet, the airflow makes a rotary motion in the dust collector, and the dust particles in the airflow move to the wall surface under the action of centrifugal force, and the airflow and gravity function The lower wall fell into the ash hopper and was separated. The factors affecting the dust removal efficiency of the dust collector are as follows:

1. Air Inlet Area: the air inlet is an important part of the dust collector, which also affects the dust removal efficiency. The smaller the area of the air inlet, the greater the air velocity and the higher the dust removal efficiency, which is beneficial to the separation of dust and other substances;

2. Air Inlet Speed: Generally, the inlet wind speed is maintained at 12-25m/s. When it is lower than 12m/s, the dust removal efficiency drops. When it is higher than 25m/s, the dust removal efficiency does not increase significantly, but the resistance loss increases and energy consumption increases. In this range, the higher the wind speed, the greater the resistance, and the higher the dust removal efficiency;

3. The diameter and height ratio of the cyclone cylinder affect the efficiency of the dust collector: at the same tangential speed, the smaller the diameter of the cylinder, the greater the centrifugal force and the higher the dust removal efficiency. If the diameter of the cylinder is too small and the particles can easily escape, the dust removal efficiency will be lower,therefore, the diameter of the air inlet of the dust collector should not be too large. The air inlet is prone to be blocked when the dust particles are too large, so the air inlet should not be too small, either;

4. It is also beneficial to improve the dust removal efficiency to  lengthen the cone of cyclone dust collector appropriately;

5. The diameter and depth of the ash outlet also affect the efficiency of the dust collector: the smaller the diameter of the ash outlet, the smaller the airflow, the greater the difficulty of dust discharge, so it is necessary to speed up the outlet exhaust speed and increase the diameter;

6. The tightness of the lower part of the dust collector: There are generally two types of air locks for the lower part of the dust collector, one is the double flap valve, and the other is the star-shaped discharger. The internal static pressure of the dust collector gradually decreases from the outer wall to the center. Even if the dust collector is under positive pressure, the bottom of the cone may be under negative pressure. The air leakage caused by the looseness of the lower part of the dust collector will take away the dust falling into the ash hopper again, so that the dust removal efficiency is significantly reduced. When the amount of air leakage reaches 15% of the air volume processed by the dust collector, the dust removal efficiency is almost reduced to zero;

7. The temperature of the gas to be processed: As the temperature of the gas increases, its viscosity becomes larger, so that the centripetal force of the dust particles increases, so the separation efficiency will decrease. Therefore, the dust collector operating under high temperature conditions should have a larger inlet airflow velocity and a smaller cross-sectional flow velocity.

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