Airvate Blog

  Introduction There are two common reasons for choosing to install more than one cyclone in parallel. 1.   One device handling the whole gas stream would become too large for practical purposes. 2.   One large cyclone could not achieve the required separation efficiency. Cyclones in parallel offer engineers a practical way to increase the collection efficiency without increasing pressure loss by splitting up the solid-laden process stream over two or more identical cyclones and operating them in parallel. Parallel arrangements of cyclones can be modeled using the same model equations as for single units. The solids-bearing gas stream is simply divided evenly between the parallel-working units. Overriding concern when designing cyclones in parallel When designing parallel cyclones, the overriding concern is that the gas and solids be distributed evenly among identical units, and consequently, each will theoretically have the same pressure drop. One way of ...

  Introduction The design of using a single cyclone connected to each particulate matter source point is common in many industrial applications. In spite of the fact that each cyclone has been designed to handle separation of particles, there are many situations where a single cyclone is inadequate for the particle collection task. In such situations, it is often feasible to use multiple units either in series, in parallel, or both. Multiple-cyclone separators in series consist of a number of individual cyclones. They are usually used in two cases: inlet dust loading is high and, emission from single cyclone configuration would be too high.  Cyclones in series When cyclones in series are feasible, a second, or even a third separator can be added in series with the first stage separator to collect additional solids. It is customary to refer to the individual stages as the “primary,” “secondary,” and “tertiary” stages or simply as the “first,” “second,” and “third” stage. Sketch...

  Introduction A cyclone separator is also called a cyclone dust collector. The typical industrial cyclone is a centrifugal reverse-flow cyclone. The dust outlet of a cyclone is called a material discharge outlet or cone-tip. Sketch of a reverse-flow, cylinder-on-cone cyclone with a tangential inlet I have been asked how the diameter of the dust outlet affects the performance of a cyclone a couple of times by colleagues and final users. Normally, when engineers size and/or design a cyclone, they pick a standard one from manuals or handbooks. However, when dust loading is high, cyclone designers worry about whether the dust outlet is big enough. If the separated dust cannot be discharged immediately, a cyclone will not be functional. In reality, after a cyclone was put into use, final users worried about the same thing. When there is blockage at the cone bottom, they have to hit the bottom part with a hammer to dislodge the plug, and this often leaves dents or deformation on...