Restoration of particle size distributions from fiber-optical in-line measurements in fluidized bed processes

In-line spatial filtering velocimetry for particle size and film thickness determination in fluidized-bed pellet coating processes

“…In another study the characteristics of the chord length were observed and it was pointed out that a CLD does not clearly reflect the underlying particle size distribution (PSD) [28]. Therefore, a mathematical approach to transform the SFV-CLD into a PSD was performed by Fischer et al [29]. The individual values detected by the SFV probe are written continuously into the flexible storage system.…”

“…The individual values detected by the SFV probe are written continuously into the flexible storage system. It was mentioned in the literature that the selected size of this particle ring buffer influences the latency of the probe and observations on the optimal buffer size were made in preliminary investigations [29].…”

A study on the applicability of in-line measurements in the monitoring of the pellet coating process

“…6) suggesting that used pellets had spherical shape and off-line measurements were a good approximation of the actual particle size. On the other hand, SFT characterises particle by measuring CL perpendicular to the direction of the measuring beam (Fischer et al, 2011). Consequently, SFT measures actual pellet diameter only in case when chord is passing through the centre Table 6 Comparison of SFT and SA particle size distribution of the third batch.…”

Recent Developments in Smart Drying Technology

“…Location of the NIR within the sensor is a critical parameter in the measurements and it is useless for monitoring of bed hydrodynamic behavior or assuring of spatial resolution [14] . The moisture content affects the measurement in monitoring the particle size, [71] and it gives only statistical characteristics without giving actual information about particle size [72] . While, it is worth mentioning that the NIR imaging system (hyperspectral imaging spectrometer) has been developed within the last few years with the ability to simultaneously record spectral and spatial information of particles.…”