I. Introduction to High Efficiency Cyclones

High efficiency cyclones are a type of separation device used for filtration and containment of particles from gas streams. They operate on the principle of centrifugal force to remove particulates and achieve high collection efficiency, especially for particles above 10 μm.

Key applications and benefits:

• Precleaning for downstream control devices like baghouses
• Primary collection of coarse particulates
• Material recovery and recycling
• Low capital cost and maintenance
• Dry collection and disposal

Multiple cyclones can be used in parallel or series arrangements to treat high gas flow rates. Advanced designs focus on maximizing performance while minimizing pressure drop.

II. Cyclone Design Factors

Several key factors impact the efficiency and performance of high efficiency cyclones:

• Diameter of cyclone body and gas exit – smaller diameters improve efficiency
• Length of cyclone body – longer cyclones have higher efficiency
• Inlet velocity – higher inlet velocities increase efficiency
• Number of gas revolutions – more revolutions separates smaller particles
• Smoothness of inner wall – smooth surfaces prevent reentrainment

Other cyclone design parameters influence separation:

• Type of inlet (tangential or axial)
• Dust discharge design (axial or peripheral)
• Flow pattern (double vortex, triple vortex)
• Pressure drop – higher efficiency units have higher pressure drops

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