Numerical investigation of the effect of number and shape of inlet of cyclone and particle size on particle separation

Cyclones are one of the most common devices for removing particles from the gas stream and act as a filter. The mode of action of separating these particles, from mass gas flow, in this case, is that the inertia force exerted on the solid particles in the cyclone, several times greater than the force of inertia into the gas phase and so the particles are guided from the sides of the cyclone body to the bottom body but less power will be affected by the gas phase and from upper parts, solid particles, goes to the bottom chamber. Most of the attention has been focused on finding new methods to improve performance parameters. Recently, some studies were conducted to improve equipment performance by evaluating geometric effects on projects. In this work, the effect of cyclone geometry was studied through the creation of a symmetrical double and quad inlet and also studied cutting inlet geometry and their influence on separation efficiency. To assess the accuracy of modeling, selected model compared with the model Kim and Lee and the results were close to acceptable. The collection efficiency of the double inlet cyclone was found to be 20–25% greater than that of the single inlet cyclone and the collection efficiency of the quad inlet cyclone was found to be 40–45% greater than with the same inlet size. Also the collection efficiency of the rectangle inlet was found to be 4–6% greater than ellipse inlet and the collection efficiency of the ellipse inlet was found to be 30–35% greater than circle inlet.