scholarly journals Drying of Soybean Seeds in Fluidized Bed: Experimental and Scale-up Simulation in Continuous Operation Mode

2014 ◽  
Vol 6 (3) ◽  
pp. 403-407 ◽  
Author(s):  
Suherman Suherman ◽  
Slamet Priyanto ◽  
Ratnawati Ratnawati
Keyword(s):  
Fluidized Bed ◽  
Operation Mode ◽  
Scale Up ◽  
Continuous Operation ◽  
Soybean Seeds

scholarly journals Paddy Drying in Batch Fluidized Bed and Scale-up Simulation in Continuous Operation Mode

2017 ◽  
Vol 2 (6) ◽  
pp. 430 ◽  
Author(s):  
Suherman Suherman ◽  
Mohammad Djaeni ◽  
Dyah Hesti Wardhani ◽  
Andri Cahyo Kumoro
Keyword(s):  
Moisture Content ◽  
Fluidized Bed ◽  
Air Temperature ◽  
Operation Mode ◽  
Scale Up ◽  
Drying Rate ◽  
Two Phase ◽  
Fluidized Bed Dryer ◽  
Fluid Bed ◽  
Experimental Works

The objective of this research is to develop the industrial-scale fluid bed dryer for paddy by scale-up of lab-scale experimental data. The developed dryer was conducted by simulation using a two phase model. Firstly, the experimental works by using lab-scale batch fluid bed dryer, was conducted to determine the drying curve of paddy (Xin 0.32 kg/kg dry base). In the experimental works,the inlet air temperature was varied (°C): 40; 50; 60. The drying rate curves as a function of moisture content showed only decreasing drying rate period. Then, a very good agreement between the measured and simualtion results of the profile of moisture content in solids was produced by simulator. Finally, asimulated continuous fluidized bed dryer for paddy with dimension 5 m of length and 1.5 of width was succesfully performed, in which the influence of mass solid flow rate 0.1; 0.2; 0.4 tons/h, height of bed 0.25; 0.50; 0.75 m, and air temperature 50; 70; 100 °C on drying process were studied. Keywords: Paddy; fluid bed dryer; batch, contonious;  modelling; simulation

Model and Results of a Study of the Synthesis of Finely Dispersed Silicon Carbide in an Electro-Thermal Reactor

2021 ◽  
Vol 316 ◽  
pp. 147-152
Author(s):  
V.S. Kuzevanov ◽  
S.S. Zakozhurnikov ◽  
Galina S. Zakozhurnikova
Keyword(s):  
Silicon Carbide ◽  
Fluidized Bed ◽  
Process Model ◽  
Operation Mode ◽  
Specific Energy Consumption ◽  
Thermal Reactor ◽  
Carbide Formation ◽  
Level Of Automation ◽  
High Temperature Synthesis ◽  
Basic Equations

The high-temperature synthesis of silicon carbide (SiC) in an electro-thermal fluidized bed reactor (EFB) has advantages, in comparison with the production in resistance furnaces, in terms of specific energy consumption, productivity and the level of automation of the technological process. The basic equations of the fluidized-bed carbide formation process model are presented in the paper. The results of calculating the synthesis parameters of finely dispersed SiC in the stationary operation mode of the EFB reactor are also presented. The correspondence between the calculated and available experimental results on the output of the final product is shown.

scholarly journals Scale-up of chaotic fluidized bed hydrodynamics

1996 ◽  
Vol 51 (10) ◽  
pp. 1991-2000 ◽  
Author(s):  
J.C. Schouten ◽  
M.L.M. Vander Stappen ◽  
C.M. Van Den Bleek
Keyword(s):  
Fluidized Bed ◽  
Scale Up

Finite Element Analysis of the Stress on Cylinder of the Fluidized Bed Reactor for Fast Pyrolysis

2011 ◽  
Vol 201-203 ◽  
pp. 660-663
Author(s):  
Qing Ruo Xie ◽  
Yi Sun ◽  
Li Wen Zheng ◽  
Hu Qi Wang ◽  
Zhang Fa Tong
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Fluidized Bed ◽  
Safety Assessment ◽  
Scale Up ◽  
Fast Pyrolysis ◽  
Fluidized Bed Reactor ◽  
Element Analysis ◽  
Ansys Analysis ◽  
Different Temperatures

A new experimental fluidized bed reactor was investigated and designed which has been widely utilized for fast pyrolysis under different temperatures (T=727–973 K).The stresses of the reactor cylinder are analyzed using finite element method(FEM, ANSYS Inc., U.S.A ) based on the safety assessment, and the cylinder is designed for installing scheme. The result of ANSYS analysis shows that the stress unstable positions are nearby both ends of the cylinder. The results of analysis are shown that the designing stresses are not beyond the allow able ones. So the designing parameters can possess sufficient reliability, and the design scheme can completely satisfy the strength requirement. Certainty of the stress could offered the valuable instruction for the application of the equipment on industrial scale-up.

scholarly journals Diffusion models and scale-up

2005 ◽  
Vol 9 (1) ◽  
pp. 43-72 ◽  
Author(s):  
Christo Boyadjiev
Keyword(s):  
Mass Transfer ◽  
Parameter Identification ◽  
Fluidized Bed ◽  
Scale Up ◽  
Catalytic Reactions ◽  
Fluidized Bed Reactors ◽  
Hierarchical Approach ◽  
Model Parameter ◽  
Transfer Processes ◽  
Three Phase

A model for transfer processes in column apparatuses has been done. The model may be modified for different apparatuses as columns with (or without) packet bed, two (or three) phase airlift reactors and fluidized bed reactors. The mass transfer is result of different volume reactions as a chemical, photochemical, biochemical or catalytic, reactions, or interphase. mass transfer. The using of the average velocities and concentration permit to solve the scale-up problems. A hierarchical approach for model parameter identification has been proposed.

Scale Effects on Fluidized Bed Hydrodynamics

2005 ◽  
Vol 3 (1) ◽  
Author(s):  
Rachid Mabrouk ◽  
Ramin Radmanesh ◽  
Jamal Chaouki ◽  
Christophe Guy
Keyword(s):  
Fluidized Bed ◽  
Particle Tracking ◽  
Fluidized Beds ◽  
Fiber Optic ◽  
Scale Effects ◽  
Scale Up ◽  
Radial Profile ◽  
Radioactive Particle Tracking ◽  
Industrial History ◽  
Radioactive Particle

Industrial history is full of events related to scale-up challenges. Failure at the scale-up stage is no longer surprising. Engineers and scientists have been trying to gather all the key parameters for decades, but, unfortunately, there are still no exact and well-established rules ensuring an accurate transition from one scale to another. Even the minimum lab-scale fluidized bed is still undefined.In this work, the effect of bed diameter on gas-solid behavior is investigated in three fluidized beds, 152mm, 78mm, and 50mm in diameter, in which the conventional scale-up rules are respected. The experiments were carried out using sand and alumina particles.The results were obtained and confirmed using fiber optic techniques and radioactive particle tracking, respectively. The results show that radial solid hold-up behavior on a small bed diameter scale is completely different from that on the intermediate bed diameter scale. The radial profile of solid hold-up on a small and very small bed diameter indicates an increase from a low value near the wall to a high value at the center at different heights from the distributor. By contrast, the opposite profile is observed on the intermediate bed diameter, similar to what is usually reported in the literature.

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