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Design and Calculation Methods for Uniflow Cyclones

By Ulrich Muschelknautz, MK Engineering |

Uniflow cyclones can be effective solid-gas separation equipment when space is limited. Presented here are design and calculation methods for uniflow cyclones aimed at widening the industrial usefulness of these devices Cyclone separators are, in addition to fabric filters, electrostatic precipitators and scrubbers, the most commonly applied separators for removing solid particles from gases. They are used either to keep the exhaust air of a plant clean or to obtain powdery product from process gases. Compared to the other types of separators mentioned, cyclone separators have several major advantages. Their relatively simple and robust construction and operation result in comparatively low investment and operating costs in many cases. Also, they can be used in processes requiring high temperatures (up to 1,200°C), high pressures (over 100 bars) and high solids loads (for example, 30 kg solids per kg gas). Finally, they allow the reuse of the separated particles. A competitive alternative to the standard cyclone for gas-solids separation is the uniflow cyclone. Like a pipe, a uniflow cyclone has gas and particles passing through it in only one direction. Clean gas and separated particles leave the device at the same end. The vortex…
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