The dust removal efficiency of the cyclone is related to the particle size of the dust particles. The larger the particle size, the higher the efficiency. When the particle size is large to a certain value, the dust removal efficiency of the cyclone can reach 100%. So what are the main factors affecting the efficiency of cyclone dust collectors?
1, the inlet flow rate
Increasing the intake pipe flow rate within a certain range can improve the dust removal efficiency. However, the inlet flow rate is too high, and some of the separated dust particles are taken into the internal swirling flow and taken away, resulting in a decrease in dust removal efficiency. In addition, the pressure loss is proportional to the square of the inlet velocity, the inlet flow rate is too large, and the pressure loss is increased. thus. Considering the combination of technology and experience, the suitable range of inlet flow rate is generally 12-20m/s, not less than 10m/s, to prevent ash from entering the inlet pipe.
2, the structure size of the dust collector
The smaller the simplified diameter, the greater the centrifugal force of the dust particles at the same tangential speed, and the higher the dimensional efficiency. The change of the simplified height has no obvious influence on the dust removal efficiency, and appropriately increasing the height of the vertebral body is beneficial to improve the dust removal efficiency.
3. Dust particle size and density Because the centrifugal force of the dust particles is proportional to the cube of the particle size, and the radial gas resistance is only proportional to the primary of the particle size, the large particle size is easier to capture than the small particle size. . The dust removal efficiency increases with the increase of the true density of the dust particles, the density is small and difficult to separate, and the dust removal efficiency decreases.
4, gas temperature and viscosity
The gas viscosity increases with increasing temperature, and the split particle size is proportional to the square root of the viscosity, so the dust removal efficiency of the cyclone decreases with increasing gas temperature and viscosity.
5. Air tightness of the lower part of the dust removal equipment
The static pressure inside the dust collector gradually decreases from the outer wall to the center, and even if the dust is operated under positive pressure, the bottom of the cone may be in a negative pressure state. If the lower part of the precipitator is not tight and leaks into the air, the dust that has fallen into the ash hopper will be taken away again, so that the dust removal efficiency is significantly reduced.
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Label: What are the factors that affect the efficiency of the cyclone?
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