Early Detection of Agglomeration in Conical Spouted Beds Using Recurrence Plots

Savari, Chiya
Külah, Görkem
Sotudeh-Gharebagh, Rahmat
Mostoufi, Navid
The agglomeration of particles in a conical spouted bed was investigated using a recurrence plot (RP) and recurrence quantification analysis (RQA) of the pressure fluctuations (PFs) and acoustic emission (AE) signals. Experiments were carried out in a 45 degrees conical spouted bed with sugar particles (d(P) = 720 mu m; rho(p) = 1580 kg/m(3)). Water was sprayed incrementally into the bed to produce agglomerates during the operation. Several recurrence quantification parameters were calculated during the agglomeration process, and the most suitable ones were chosen for early prediction of the agglomeration in the bed. The results show that recurrence rate, determinism, and laminarity of PFs and AE signals increase during the agglomeration process, which indicate that bed behavior becomes more periodic and deterministic in nature. Additional examination of the RQA parameters show that AE signals are substantially more sensitive to the hydrodynamic changes that occur in the bed, compared to those of PFs, and therefore can detect changes earlier, with more accuracy.


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GOLSHAN, Shahab; YAMAN, Onur; KÖKSAL, MURAT; Külah, Görkem; ZARGHAMI, Reza; MOSTOUFI, Navid (Elsevier BV, 2018-09-01)
Hydrodynamics of conical spouted beds operating with high density particles was studied by means of measuring the minimum spouting velocity and analysis of pressure signals in time and frequency domains. Three different types of particles, zirconia (d(p) = 1 mm; rho(p) = 6050 kg/m(3)), zirconia toughened alumina (rho(p) = 3700 kg/m(3); d(p) = 1, 2 and 2.4 mm) and glass beads (rho(p) = 2460 kg/m(,)(3) d(p) = 1 and 2 mm) were used in the experiments. Experiments were performed in three small scale (gamma = 30...
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Effects of particle size, particle density, gas inlet diameter and static bed height on the stability of operation in conical spouted beds were investigated through analyses of information entropy of pressure fluctuations. In this respect, the maximum information entropy of pressure fluctuations was used as a stability criterion. The results showed that stability of the bed increases with an increase in the maximum entropy. The maximum information entropy of pressure fluctuations increases with increasing p...
Monitoring of liquid sprayed conical spouted beds by recurrence plots
Savari, Chiya; Külah, Görkem; KÖKSAL, MURAT; Sotudeh-Gharebagh, Rahmat; Zarghami, Reza; Mostoufi, Navid (Elsevier BV, 2017-07-01)
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Citation Formats
C. Savari, G. Külah, R. Sotudeh-Gharebagh, N. Mostoufi, and M. KÖKSAL, “Early Detection of Agglomeration in Conical Spouted Beds Using Recurrence Plots,” INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, pp. 7179–7190, 2016, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/47491.