Mathematical Modeling and Simulation of Drying Using Two Industrial Concurrent and Countercurrent Rotary Dryers for Ammonium Nitrate |
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| Authors: | Hamed Abbasfard Sattar Ghader Hasan Hashemipour Rafsanjani Mehdi Ghanbari |
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| Affiliation: | 1. Department of Chemical Engineering , College of Engineering, Shahid Bahonar University of Kerman , Kerman , Iran h.abbasfard@eng.uk.ac.ir;3. Department of Chemical Engineering , College of Engineering, Shahid Bahonar University of Kerman , Kerman , Iran;4. Mineral Industries Research Center, Shahid Bahonar University of Kerman , Kerman , Iran;5. Department of Chemical Engineering , College of Engineering, Shahid Bahonar University of Kerman , Kerman , Iran;6. Department of Chemical Engineering , School of Chemical and Petroleum Engineering, Shiraz University , Shiraz , Iran |
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| Abstract: | Drying of ammonium nitrate (AN) is accomplished in the Shiraz Petrochemical Complex (SPC) using a concurrent rotary dryer following a countercurrent rotary dryer. A mathematical model for these rotary dryers including heat and mass transfer was developed. The model was checked against industrial-scale data, which showed a good agreement. The average absolute deviation of the simulation results compared to the industrial data for the concurrent dryer was 4.0% for solids moisture, 1.3% for solids temperature, and 1.8% for air temperature and for the countercurrent dryer it was 9.0% for the solids moisture, 2.0% for solids temperature, and 4.6% for air temperature. These simulation results reveal that for outlet solid moisture, inlet AN moisture, and air temperature as well as the outlet temperature of product, the inlet solid and air temperature have major effects for both concurrent and countercurrent flow. |
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| Keywords: | Ammonium nitrate plant Concurrent and countercurrent Drying kinetics Mathematical model Rotary dryer |
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