Simulation of the Scale-up Process of a Venturi Jet Pyrolysis Reactor

Abstract

Micro- and nano-sized cerium oxide particles can be prepared through pyrolyzing cerium chloride solution directly in the venturi jet pyrolysis reactor. Micro- and nano-sized cerium oxide particles have better performance and higher application value. To increase the production of micro-and nano-sized cerium oxide, it is necessary to scale up the venturi jet pyrolysis reactor. According to the geometric similarity principle, the scale-up of the venturi jet pyrolysis reactors utilize dimensional analysis methods, with FLUENT13.0 and user-defined functions, following the mathematical simulation of the resulting enlarged reactors. After the dimensional analysis, the empirical formula obtained between the reactants and all the parameters is Q = 2.240727 × 10−4P0.004568ρ0.26223d−0.24801V1.25714n0.076479μ−0.26628, and the geometrical scale-up of the reactors needs to follow V = 0.0209d0.196. The results in this study can provide data support for the future optimization and amplification of reactors.

Advanced Simulation Technologies of Metallurgical Processing

“…Equally or even more important are processes on a micro-scale in the rapidly growing field of additive manufacturing, for which the modelling of process-structure-properties-performance is a key loop [8]. Again, additive manufacturing underpins both the multi-physics behavior and multi-scale aspects, because the grain structure after solidification determines the performance such as mechanical strength to a large extent and depends heavily on process conditions such as laser speed, power or hatch size [7][8][9][10][11][12]. Solidification was also addressed by a volume-averaged approach for multiphase flow during alloy solidification, indicating that a full 3D calculation with the multiphase volume-averaged solidification will be available in the not too far future due to the development in computer power.…”

The Effect of Pyrolysis Conditions on the Preparation of Fe2O3 Particles Using Simulated Pickling Liquor in a Venturi Reactor

“…Moreover, computational fluid dynamics (CFD) was used to simulate the spray pressure and temperature distribution in a pyrolysis furnace. Lv et al produced a mixture of gases and solids with the Venturi reactor, which improved the pyrolysis efficiency and prepared spherical CeCl 3 and Fe 2 O 3 micro/nanoparticles (Lv et al, 2019a;Lv et al, 2019b;Lv et al, 2019c;Lv, 2019). Venturi reactor can enhance the mix of the gas and liquid, and solve the problem of Ruthner spray pyrolysis method that the nozzle needs to be replaced periodically.…”