Abstract
Based on the developed continuous production system of sodium phenol carboxylation reaction, several types of discharging devices are proposed, which are suitable for the case where the transported particles are not easy to maintain a stable state in the transported fluid. Numerical simulations of the gas-solid two-phase flow characteristics and particle distribution were performed with DPM, and the particle retention ratio and fluid loss degree were proposed to investigate the performance of the discharging devices. The results of simulations and industrial experiments showed that a guide plate installed in the “B” discharging device can solve the accumulation problem, realize the efficient and continuous delivery of the particles, and maintain a uniform distribution of particles. This study can provide a reference for the design of a gas-solid two-phase discharging device, and guide the industrial experimental operation and modification of continuous production systems for sodium phenol carboxylation.
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Abbreviations
- ux :
-
gas phase velocity in the x direction [m/s]
- uy :
-
gas phase velocity in the y direction [m/s]
- Fp :
-
the force of the particle on the fluid [N]
- Fx :
-
additional acceleration force [N]
- CC :
-
the Cunningham correction
- ds :
-
particle diameter [mm]
- Gk :
-
turbulent kinetic energy
- A:
-
circle area [m2]
- PTn :
-
particle retention ratio
- T:
-
simulation time [s]
- Q:
-
gas volume flow rate [m3/h]
- Qc :
-
volume flow rate of the refill of the storage tank [m3/h]
- αg :
-
gas phase volume fraction
- ρ g :
-
gas phase density [kg/m3]
- μ g :
-
fluid shear viscosity [kg/(m·s)]
- μ t :
-
turbulent viscosity [kg/(m·s)]
- μ :
-
fluid molecular viscosity [kg/(m·s)]
- λ :
-
average free range of gas molecules
- α x(x=k or ω):
-
effective viscosity
- σx(x=k or ι):
-
diffusion constant of the model
- γ a :
-
uniformity index
- Φ :
-
variable for the specified cross-section
- \(\overline \Phi \) :
-
average of variables for the specified cross-section
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Acknowledgements
This work was supported by a grant from the Natural Science Foundation of Shandong Province (Grant No. ZR2020MB122), Shandong Province Taishan Scholar engineering under special funding Foundations, and the Tackling Key Program of Science and Technology in Shandong Province (No. 2019GSF109009).
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Duan, Z., Wang, J., Sun, S. et al. Study on the performance of different discharging devices of a continuous production system. Korean J. Chem. Eng. 39, 876–886 (2022). https://doi.org/10.1007/s11814-021-0971-5
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DOI: https://doi.org/10.1007/s11814-021-0971-5