| 摘要 |
<p>Process for particle size analysis of dusts dispersed in gas streams consists of passing the dust laden gas consecutively through several, at least two, cyclonic separators with known characteristics and finally through a fine filter, e.g. a ceramic or paper filter. From the degree of separation achieved in the cyclonic separators and knowing their characteristics, it is possible to determine particle size distributions. All or some of the separators before the fines filter can have the same characteristics. The evaluation is carried by means of the known Rosin-Ramnder-Sperling distribution function, using analytical or graphical methods. Before the first cyclonic separator, an additional controllable and measurable quantity of air can be injected to give constant flow through the cyclone. Used to analyse the size distribution of dusts dispersed in a gas stream. If such dusts are separated and subsequently analysed, then there is an error introduced by possible aggregations occurring in the dust heap. This is avoided if the analysis or separation is carried out with the dust still "live" or suspended, as is the case in the method claimed.</p> |
