Abstract
A technique for determining the particle size and its concentration in multi-phase flow based on random theory and light scattering theory is discussed here. It is named the fluctuation method because the fluctuating character of transmitted light is used. Based on this principle, a measurement system is established. The latex spheres as Standard Reference Materials (SRM) and samples from industrial processes have been measured by the measurement system. The measured results of SRM agree very well with their marked size. An engineering on-line monitor system has also been developed for pneumatic conveying system in power plants. The monitor test shows that this technique is suitable for on-line monitoring of particle size and concentration in multi-phase flow.
