Experimental determination of the optimal ratios of structural dimensions in the whirl chamber for drying granular materials

Modeling fast biomass pyrolysis in a gas–solid vortex reactor

“…The past decades have seen a relative resurgence RFB-SG research in several different fields, including nuclear technologies [10,11], drying applications [12,13], and chemical reactors [14][15][16]. The RFB-SG technology has hybrid characteristics of both fluidized bed and packed bed reactors.…”

Qualitative numerical study of simultaneous high-G-intensified gas–solids contact, separation and segregation in a bi-disperse rotating fluidized bed in a vortex chamber

“…This so-called Cartesian cut-cell method has been described by Dietiker et al 32 A 24 cm-diameter (D vc ), 5 cm-long (L vc ) vortex chamber with 8 gas inlet slots (n), 4 mm wide each (s), and with an 8 cm-diameter chimney (D c ) was simulateddimensions close to those typically used in experimental and pilot scale studies. 4,7,15 The gas is injected nearly tangentially. The chimney-to-vortex chamber diameter ratio is 0.33, the vortex chamber lengthto-diameter ratio 0.21.…”

“…So taking as an example interfacial mass transfer with the amount of species A transferred between gas and particles per m³ reactor and per second written as k G •a V •(C A -C A s,s ), where k G is the coefficient of mass transfer in m³ fluid per m² interface per second, high-G operation allows increasing both k G and a V . Application to drying of granular materials, including biomass, was studied by Kochetov et al, 4 Volchkov et al 5,6 and Eliaers and De Wilde. 7 Eliaers et al 8 numerically studied optimization of the vortex chamber dryer design to improve the product quality/uniformity and the air usage efficiency.…”

Assessment of a Gas–Solid Vortex Reactor for SO2/NOx Adsorption from Flue Gas

“…The result is an inner (active) reactor region with a diameter of 0.54 m in which the solid phase is contained. The total length (or thickness) of the reactor is 0.1 m. The volume of the reactor is defined as a cylinder with a diameter of 0.54 m and a height of 0.1 m, or 0.023 m 3 . The main gas outlet is situated in the center of one end-wall (the other end-wall is a flat plate) of the reactor, and the total diameter of the central gas outlet is 0.15 m. After exiting the reactor, the gas flows into a cyclone, which is not relevant to the present work.…”

“…In addition to sporadic research efforts in the second half of the 20th century, the past decade has seen a relative resurgence in interest for RBR-SGs in several different fields, including nuclear technologies, 1,2 drying applications, 3,4 and chemical reactors. 5−7 This technology can be classified as a bed-type reactor that has hybrid characteristics of both fluidized bed and packed bed reactors.…”