The role of Desander Cyclone

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The Desander Cyclone is a method of removing particulates from air, gas or liquid streams without the use of filters by vortex separation. When removing particulate matter from liquids, hydrocyclones are used. Use cyclone from gas. Rotational effects and gravity are used to separate mixtures of solids and fluids.

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A high-speed swirling flow is established within a cylindrical or conical vessel called a Desander Cyclone. Air flows in a helical pattern, starting at the top (wide end) of the cyclone and terminating at the bottom (narrow end), leaving the cyclone in a straight flow through the center of the cyclone and out the top. Larger (dense) particles in a swirling flow have too much inertia to follow the tight curves of the flow, so hit the outer wall and fall to the bottom of the cyclone where they can be removed. In a conical system, as the rotating flow moves toward the narrow end of the cyclone, the radius of rotation of the flow decreases, separating smaller and smaller particles. The geometry of the Desander Cyclone as well as the volumetric flow define the cut point of the cyclone. This is the particle size that will be removed from the stream with 50% efficiency. Particles larger than the tangent point will be removed with higher efficiency, while smaller particles will be removed with less efficiency because they are more difficult to separate, or when the air vortex reverses direction to move towards the exit, they May be re-entrained.
Another Desander Cyclone design uses a secondary airflow within the cyclone to prevent the collected particles from hitting the walls, thus protecting the walls from abrasion. The primary air stream containing particulates enters the bottom of the cyclone and is forced to rotate by fixed rotating blades. The secondary air stream enters from the top of the Desander Cyclone and moves down to the bottom, trapping particles from the primary air. The secondary airflow also allows the collector to be optionally mounted horizontally, as it pushes particles towards the collection area and does not rely solely on gravity to perform this function.