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Rationality and Reliability of Cyclone Cluster Design

Rationality and Reliability of Cyclone Cluster Design
Rationality and Reliability of Cyclone Cluster Design

Details

1.1 Patented spiral feed structure

（1） Structural analysis

The spiral feeding pipe cavity (as shown in the middle picture) will lead fluid to move downward spirally, with small feeding resistance and large slurry capacity.

The research on flow field (as shown in the right picture) shows that the particles will re-align when rotating three quarters circle in the feeding pipe cavity, which means the spiral feeding chamber has pre-classifying function, at this moment the coarse particles will be closer to the outside while the fine particles will be closer to the inside, thus both the classifying precision and classifying efficiency can be improved.

2）Internal flow field simulation

Cyclone with spiral feeding chamber has small feeding resistance and turbulence flow, low energy consumption and light wear on feeding chamber.

The feeding pipe cavity of spiral feeding chamber can conform to the movement pattern of fluid better, so the dynamic pressure transition will be smoother, and the turbulence at the connection between feeding pipe and cylinder will be smaller with lower energy consumption; the uniform wear on feeding chamber can avoid the flow field dissymmetry problem on other structures caused by rapid partial wearing.

（3）Comparison of Classification Efficiency Curves

It can be seen from the figure that the new spiral structure cyclone (A) has higher classification accuracy than the ordinary cyclone (B).

2.2 Multi-cone Patented Structure 
The classifying cyclone FX350-GX-B adopts the multi-cone patented structure, which can realize fine particle classification under high concentration with large-dia. cyclone. 
（1）Structural analysis

  1. Multi-cone structure features:
  • The first section has a larger cone angle, which maximizes the tangential velocity of the fluid in the cyclone and increases the centrifugal force field;
  • The angle of the second section of the cone is small, the length of the cone section is large, and the material to be treated has sufficient time and space for full exchange;
  • The third cone has a larger cone angle and a straight section structure, which is beneficial to reduce the entrainment of fine particles in the underflow of the hydrocyclone.
  1. Comparison with conventional single cone angle cyclone:
  • The single cone angle cyclone is easy to overflow or the underflow is large, which is easy to be considered. The grading index of the cyclone is difficult to control and the classification efficiency is low;
  • The single cone angle cyclone cone has large swirling resistance and high energy consumption.
  • 2) Internal flow field simulation
     Radial velocity simulation
    In the first cone section, the radial velocity is in the form of a high-speed unstable oscillation, and in the second cone section, the radial velocity is in a regularly fluctuating state, which is superior to the single-cone swirler in the multi-cone swirler. An important reason.
    Internal density simulation
    It can be seen that there is a significant change in density at the second cone of the multi-cone swirler, which can loosen the compacted particles of the first cone and create good conditions for the particles to be graded again. The internal cyclone is sent back to realize the "loose" and "panning" of the material, and the underflow density is increased again at the third-stage cone, which can increase the underflow concentration and reduce the amount of underflow.
     

 

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