Acoustic chemometrics for on-line monitoring and end-point determination of fluidised bed drying

Online prediction of biomass moisture content in a fluidized bed dryer using electrostatic sensor arrays and the Random Forest method

“…Different types of methods are available for monitoring the operation conditions of the FBDs, including acoustic emission [8], electrical capacitance tomography (ECT) [9,10], microwave resonance [11] and triboelectric probes [12]. Aghbashlo et al presented a review on the techniques to monitor and control the fluidization quality in the FBDs [13].…”

Recent Developments in Smart Drying Technology

“…The crisp product has more peaks as well as having peaks of higher amplitude than the less crisp product. [93] Ihunegbo investigated the ultrasound technique for on-line monitoring and end-point determination in fluidized bed drying; in his experiment acoustic signals were acquired using four accelerometers mounted at different locations on the wall of the fluidized bed [94] , as shown in Fig.10, the final prediction results were satisfactory for monitoring the drying progress and end point determination [94] .This on-line monitoring technique for the drying process developed in this study can be applied in many relevant industries in order to improve the overall economics of material drying by optimizing fluidized bed drying technology using this decisive end-point determination approach.…”

Monitoring of scaling in dilute phase pneumatic conveying systems using non-intrusive acoustic sensors – A feasibility study

“…Passive acoustic chemometrics has been applied in several previous studies to monitor parameters in powder handling processes. Monitoring of process state and product quality in a fluidized bed granulation process [12], end point detection in fluidized bed drying of biomass [13] and measuring of mass flow rate [14], material concentration [15] and material velocity [16] in dilute phase pneumatic conveying are some examples of applications. Also, particularly relevant for this study, the passive acoustic method has been used to monitor wax deposition thickness in oil production pipelines [17].…”