Comparative performance analysis between conventional and square cyclones for solid Particle-Gas Separation: A review

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Conventional cylindrical-body cyclone separators have been in use in the industry for a long time due to their many benefits, including simple design and construction, low running costs, no moving parts, and significant particle collection efficiency. Many studies have been done on this cyclone type because of its utility in areas like mining and agriculture. A cyclone with a square body, rather than a cylindrical one, was introduced in the previous three decades. Square cyclones are not well-known in the industrial world yet. Still, they have several advantages over conventional cyclones, including faster construction, quicker integration with boilers, and improved thermal efficiency when used with fluidized bed circulation-type boilers. This research compares the performance of square and conventional cyclones in terms of collecting efficiency and pressure drop. Factors including solid loading ratio, gas entry velocity, gas viscosity, and cyclone shape affect pressure drop and separation efficiency. According to data from published papers, conventional cyclones outperform square cyclones in terms of collection efficiency. However, simulation studies have shown that the pressure drop in a square cyclone is less than that in a cylindrical cyclone. Given that square cyclones are more straightforward to fabricate than conventional cyclones, the findings of this paper open up a lot of room for more research into developing square cyclones that can equal the performance of conventional cyclones.