COMPARISON OF THE DRYER AIR INLET POSITION ON THE SPRAY DRYER WITH A DOUBLE CONDENSER TO PRODUCE A ROTATING FLOW THROUGHOUT THE DRYING CHAMBER: CFD ANALYSIS
DOI:
https://doi.org/10.22441/ijimeam.v5i1.21605Keywords:
Dry Air Inlet, Drying Process Material, Discrete Random Walk, CFD, Spray-DryerAbstract
Simulation of the drying air and the spray of liquid in the spray dryer chamber with Discrete Phase Material (DPM) and Discrete Random Walk (DRW) was presented in this study using CFD methods to analyze the drying liquid. The main problem in spray drying is the adhesion of the material to the drying chamber walls, which causes uneven drying material. This adhesion can slow down the drying process and reduce productivity. The design of the drying air inlet into the drying chamber becomes essential to research. Variations in the position of the drying air inlet into the drying chamber are carried out in the 3D spray dryer room to see the mechanism of the centrifugal velocity of the drying airflow, which can improve uniform mixing with flow resistance due to friction with small walls and the drying air velocity. This phenomenon is impossible to observe in experiments. A geometric model consisting of 1,054,000 hexa-mesh elements at the area around the nozzle, the top spot of the chamber and the remaining area covered with a tetrahedral mesh, was determined to predict velocity, temperature, and fluid flow behavior. The first position, the dryer air inlet, is at an angle from the diameter of the spray drying chamber. The second position is in the middle of the diameter of the drying chamber. The position of the first inlet produces a more even temperature contour with a more tangential velocity due to the small frictional resistance with the walls. At the same time, the second position is not recommended because the flow leads to one side of the wall and creates sticking and even material buildup. A double-heated condenser can dry air at moderate temperatures, and it is a very effective drying product— positioning the dryer air inlet into the drying chamber, achieving the economical production of high-quality products.
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References
Hussain, F., Jaskulski, M., Piatkowski, M., & Tsotsas, E. (2022). CFD simulation of agglomeration and coalescence in spray dryer. Chemical Engineering Science, 247, 117064.
Ali, M., Mahmud, T., Heggs, P. J., Ghadiri, M., Bayly, A., Ahmadian, H., & de Juan, L. M. (2015). CFD simulation of a counter-current spray drying tower with stochastic treatment of particle-wall collision. Procedia engineering, 102, 1284-1294.
Kosasih, E. A., & Ruhyat, N. (2016). Combination of electric air heater and refrigeration system to reduce energy consumption: A simulation of thermodynamic system. International Journal of Technology, 2, 288-295.
Schuck, P., Jeantet, R., Bhandari, B., Chen, X. D., Perrone, I. T., de Carvalho, A. F., ... & Kelly, P. (2016). Recent advances in spray drying relevant to the dairy industry: A comprehensive critical review. Drying Technology, 34(15), 1773-1790.
Cheow, W. S., & Hadinoto, K. (2010). Enhancing encapsulation efficiency of highly water-soluble antibiotic in poly (lactic-co-glycolic acid) nanoparticles: Modifications of standard nanoparticle preparation methods. Colloids and Surfaces A: Physicochemical and Engineering Aspects, 370(1-3), 79-86.
Masters, K. (1991). Spray Drying Handbook, Longman Scientific & Technical.
Bhandari, B. R., Datta, N., & Howes, T. (1997). Problems associated with spray drying of sugar-rich foods. Drying technology, 15(2), 671-684.
Masters, K. (1994). Scale-up of spray dryers. Drying technology, 12(1-2), 235-257.
Chegini, G. R., & Ghobadian, B. (2005). Effect of spray-drying conditions on physical properties of orange juice powder. Drying technology, 23(3), 657-668.
Desobry, S. A., Netto, F. M., & Labuza, T. P. (1997). Comparison of spray‐drying, drum‐drying and freeze‐drying for β‐carotene encapsulation and preservation. Journal of Food Science, 62(6), 1158-1162.
Al-Asheh, S., Jumah, R., Banat, F., & Hammad, S. (2003). The use of experimental factorial design for analysing the effect of spray dryer operating variables on the production of tomato powder. Food and bioproducts processing, 81(2), 81-88.
Abadio, F. D. B., Domingues, A. M., Borges, S. V., & Oliveira, V. M. (2004). Physical properties of powdered pineapple (Ananas comosus) juice––effect of malt dextrin concentration and atomization speed. Journal of Food Engineering, 64(3), 285-287.
Nath, S., & Satpathy, G. R. (1998). A systematic approach for investigation of spray drying processes. Drying technology, 16(6), 1173-1193.
Patil, V., Chauhan, A. K., & Singh, R. P. (2014). Optimization of the spray-drying process for developing guava powder using response surface methodology. Powder Technology, 253, 230-236.
Jaskulski, M., Wawrzyniak, P., & Zbiciński, I. (2015). CFD model of particle agglomeration in spray drying. Drying technology, 33(15-16), 1971-1980.
Roustapour, O. R., Hosseinalipour, M., Ghobadian, B., Mohaghegh, F., & Azad, N. M. (2009). A proposed numerical–experimental method for drying kinetics in a spray dryer. Journal of Food Engineering, 90(1), 20-26.
Huang, L., & Mujumdar, A. S. (2006). Numerical study of two-stage horizontal spray dryers using computational fluid dynamics. Drying Technology, 24(6), 727-733.
Sudarma, A. F. & Morsy, M. (2017). RANS numerical simulation of lean premixed bluff body stabilized combustor: Comparison of turbulence models. Journal of Thermal Engineering, 3(6), 1561-1573.
Tan, L. W., Ibrahim, M. N., Kamil, R., & Taip, F. S. (2011). Empirical modeling for spray drying process of sticky and non-sticky products. Procedia Food Science, 1, 690-697.
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