A Example Calculation for Multicyclone Arrangements

Let us assume that the separation of the large cyclone in Appendix 5.A is insufficient to meet emission standards. Specifically the loss from that cyclone 

At the initial stage in the decision process, and before any measurements are made, we wish to estimate on paper whether this target can be achieved using cyclone technology, and if it can, what sort of cyclone arrangement must be installed downstream of the large cyclone. 

The first step is to estimate the cut size needed to achieve the target emission. The required overall efficiency for the new cyclone stage is  

If we know the size distribution of the solids lost from the large, first-stage cyclone we can determine the approximate cut size needed to achieve this. The strategy is as follows  

Let us use the simple model of Barth for this first calculation. If we find that cyclones are a feasible option, we can use more sophisticated calculation models, or scale experimental results for model cyclones later. 

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