Modeling of the rice drying process in a custom-made lab-scale fluidized bed dryer

2020 ◽  
Author(s):  
Kaushik Luthra ◽  
Sammy Sadaka
Keyword(s):  
Fluidized Bed ◽  
Drying Process ◽  
Fluidized Bed Dryer ◽  
Custom Made ◽  
Rice Drying

scholarly journals Simulation and Analysis of Plug Flow Fluidized Bed Dryer

2020 ◽  
Vol 9 (7) ◽  
pp. 805-811
Keyword(s):  
Mass Transfer ◽  
Moisture Content ◽  
Heat And Mass Transfer ◽  
Fluidized Bed ◽  
Plug Flow ◽  
Small Scale ◽  
Outlet Temperature ◽  
Drying Process ◽  
Fluidized Bed Dryer ◽  
Hot Air

Today many industries now use the dryer as a part of grain-drying process even during wet and dry seasons. This helps in reducing spoilage and wastage of paddy. Mostly the available industrial dryers are expensive to purchase and to maintain its smooth functioning. This study therefore is a step to design a simple Plug flow fluidized dryer that can lead to introduce small scale dryers to paddy process industry. The Plug flow fluidized bed dryers are designed and fabricated in this study consists of the drying chamber, hot air distributer plate, hot air inlet and exit system, paddy entry and exit system, fluidization chamber unit with temperature control unit and the centrifugal fan. The evaluation of dryer is based on drying time and reduction in moisture content and outlet temperature of paddy on quality parameters. Dryer dimensions are very important to analyze heat and mass transfer analysis of the Plug flow fluidized bed drying process of paddy grains. It was found d that heat and mass transfer properties of paddy grains in fluidized bed dryer was decreases as the time of drying passes and very rapid at the start of drying. The model present here predicts about dryer dimensions along safe zone of rough rice moisture content with other parameters. Simulation results show a good agreement between the simulation model and the existing simulation models

A Short Review on Fluidized Bed Dryer

2021 ◽  
pp. 104-105
Author(s):  
Akash H. Mali ◽  
Aditya R. Nikam ◽  
Azam Z. Shaikh.
Keyword(s):  
Mass Transfer ◽  
Heat And Mass Transfer ◽  
Fluidized Bed ◽  
Short Review ◽  
High Heat ◽  
Drying Process ◽  
Drying Time ◽  
Fluidized Bed Dryer ◽  
Advantages And Disadvantages ◽  
Fluidized Bed Drying

This artical also discusses about demostration of fluidized bed dryer with principle and application and other processing. This has lead to development of thechnology, process and equipments which not only reduce time but also increasing the output. A Fluidized bed dryer significantely reduce drying time, compared with vaccum dryer or tray dryer. In the pharmacutical industry, fluidized bed dryer are typically used for pellets drying, coating and granulation. Fluidized bed drying are very well known to yield high heat and mass transfer and hence adopted to many industrial drying process particularly pharmacy product. In this paper we show construction, working of the fluidized bed dryer. It work on the drying principle. It has several advantages and disadvantages.

scholarly journals Drying characteristics of red chili in a swirling fluidized bed dryer: An experimental study

2018 ◽  
Vol 225 ◽  
pp. 06007
Author(s):  
Mohd Azlan Zulkarnain ◽  
Nor Farhanim Md Rashid ◽  
Ahmmad Shukrie Md Yudin
Keyword(s):  
Fluidized Bed ◽  
Conventional Method ◽  
Weight Reduction ◽  
Agricultural Product ◽  
Drying Process ◽  
Drying Time ◽  
Drying Characteristics ◽  
Fluidized Bed Dryer ◽  
Inclination Angles ◽  
Time Required

Red chili is an agricultural product that contains high moisture. In this study, the drying process of red chili was conducted by using two methods which are conventional method of drying under the sun and by using swirling fluidized bed dryer. A fluidized bed column of 108 mm in diameter with slotted distributor of 45° inclination angles was used in the experiment. Result of drying by using conventional method showed that for 1kg of sample the drying time was 13 days with 212g weight reduction and the color of the red chili changed from red to dark red. Meanwhile for swirling fluidized bed dryer the time required was 4 days, 200g weight reduction and the color of red chili maintained. Based on the results obtained, the drying of red chili by using swirling fluidized bed dryer is more efficient as compared to drying by using conventional method.

Teknik Pengeringan Pati Sagu dengan Menggunakan Alat Pengering Cross Flow Fluidized Bed

Agrotek ◽  
2018 ◽  
Vol 3 (1) ◽  
Author(s):  
Abadi Jading ◽  
Paulus Payung ◽  
Eduard Tethool ◽  
Reniana Reniana
Keyword(s):  
Moisture Content ◽  
Fluidized Bed ◽  
Cross Flow ◽  
National Standard ◽  
Sago Starch ◽  
Drying Process ◽  
Drying Time ◽  
Fluidized Bed Dryer ◽  
Research Goal ◽  
C 50

<em>Sago starch drying done to reduce the moisture content in starch, so as to increase the shelf life and quality of dry starch. The drying process should be done while maintaining the physicochemical properties of sago starch. The research goal is to find the proper drying techniques to produce dried sago starch has a moisture content corresponding to the Indonesian National Standard (SNI). The experiments were performed three times with variations in temperature 40<sup>o</sup>C, 50<sup>o</sup>C, and 60<sup>o</sup>C. The moisture content of sago starch obtained at temperatures 40<sup>o</sup>C, 50<sup>o</sup>C, and 60<sup>o</sup>C, respectively 13.75% wb, 13.50% wb and 13.42% wb. Drying time at drying temperature of 40<sup>o</sup>C, 50<sup>o</sup>C, and 60<sup>o</sup>C respectively 5.5 hours, 4 hours, and 3 hours. A good drying sago starch using cross flow fluidized bed dryer at a temperature of 60�C ie, it reduces the moisture content more quickly in accordance with the SNI, and gelatinization does not occur during the drying process.</em>

Evaluation of the Performance of a Custom-Made Fluidized Bed Drying System

2018 ◽  
Vol 34 (6) ◽  
pp. 1027-1037 ◽  
Author(s):  
Sammy S. Sadaka ◽  
Kaushik Luthra ◽  
Griffiths G. Atungulu
Keyword(s):  
Aspect Ratio ◽  
Moisture Content ◽  
Fluidized Bed ◽  
Initial Moisture Content ◽  
Small Scale ◽  
Drying Rate ◽  
Furnace Temperature ◽  
Fluidized Bed Dryer ◽  
Custom Made ◽  
Drying System

Abstract. Laboratory and farm-scale fluidized bed dryers are not available to purchase. Additionally, a deliberation is presently continuing regarding the beneficial and damaging effects of drying grain in a fluidized bed. Therefore, the goal of this research was to develop and test a custom-made small-scale fluidized bed dryer, suitable for moderate farms and capable of drying small and large size grains from high moisture content to a safe storage moisture content. The customary fluidized bed dryer was developed and constructed in the Rice Research and Extension Center, Stuttgart, Arkansas. The fluidized bed dryer was used to dry wheat from an initial moisture content of 23.3% db. The effects of the aspect ratio (bed height to bed diameter ratio) of 2, 3, and 4 m/m, the furnace temperature of no heat, 100°C, 150°C, and 200°C and drying duration of 10, 20, 30, 40, 50, and 60 min on the wheat moisture content, drying rate, and dryer efficiency were investigated. The lowest wheat moisture content of 16.3% db was observed at the lowest aspect ratio of 2 m/m, the highest furnace temperature of 200°C, and the longest drying duration of 60 min. Conversely, the highest wheat moisture content of 19.0% db was observed at the highest aspect ratio of 4 m/m, and the no heat condition. The drying rate of 0.47%/min was observed at the lowest aspect ratio of 2 m/m and the furnace temperature of 200°C after 10 min. The maximum dryer efficiency of 63.2% was achieved at the aspect ratio of 4 m/m, the furnace temperature of 200°C. Two empirical models were developed to predict the moisture content of wheat and the dryer efficiency as affected by the aspect ratio, the furnace temperature and the drying duration with the adjusted coefficient of determination of 0.91 and 0.88, respectively. Although, the developed fluidized bed dryer is a lab-scale system, the experimental results provided an exceptional indication to scale up the drying system to dry grains. Keywords: Dryer efficiency, Drying rate, Fluidized bed, Moisture content, Wheat-drying.

scholarly journals Analysis of Heat Energy on the Drying Process of Paddy Using Fluidized Beds Dryer

2021 ◽  
Vol 913 (1) ◽  
pp. 012038
Author(s):  
S Syahrul ◽  
S Sukmawaty ◽  
A Priyati ◽  
J Sari ◽  
M Mirmanto
Keyword(s):  
Energy Balance ◽  
Total Energy ◽  
Experimental Method ◽  
Fluidized Bed ◽  
Fluidized Beds ◽  
Heat Energy ◽  
Drying Process ◽  
Air Velocity ◽  
Fluidized Bed Dryer ◽  
Drying Chamber

Abstract The purpose of this study was to determine the amount of heat energy in the paddy drying process using a fluidized bed dryer. The method used in this research was an experimental method using an energy balance. This test was carried out using a fluidized beds dryer, with paddy material, where the paddy was dried at a certain temperature with 3 mass treatments, namely 5, 6 kg, and 7 kg with an air velocity of 21 m/s. The results showed that the total energy that enters the drying chamber for a mass of 5 kg material is 1,022 kJ with a useful energy of 1.339 kJ. The energy that enters the drying chamber for a mass of 6 kg is 1,043 kJ with a useful energy of 2.192 kJ. For a mass of 7 kg of material, the energy that enters the drying chamber is 1,187 kJ with a useful energy of 3.578 kJ.

scholarly journals STIRRED FLUIDIZED-BED DRYER OF REGENERATED ION EXCHANGER PARTICLES

2014 ◽  
Vol 54 (3) ◽  
pp. 231-239
Author(s):  
Michal Pěnička ◽  
Pavel Hoffman ◽  
Ivan Fořt
Keyword(s):  
Fluidized Bed ◽  
Spherical Shape ◽  
Ion Exchanger ◽  
Favourable Effect ◽  
Drying Process ◽  
Batch Mode ◽  
Drying Time ◽  
Fluidized Bed Dryer ◽  
Mechanical Stirring ◽  
Fluidized Bed Drying

<p class="TextCxSpFirst">This article describes intensification of the fluidized-bed drying process for regenerated spherical-shape ion exchanger particles in the batch mode, achieved by a mechanical stirrer in the fluidized bed layer of the dried particles. The effect of the mechanical stirring system on the drying process was examined.</p> <p class="TextCxSpLast">Calculations as well as results of comparison measurements provide evidence of a favourable effect of stirring on the total drying time as compared to the initial unstirred system. The regenerated ion exchanger particles pass to the fluid state in a shorter time and the ultimate total drying time is thus more than 60% shorter.</p>

scholarly journals Microwave assisted fluidized bed drying of celery

2018 ◽  
Author(s):  
Amanat Kaur ◽  
Yvan Gariépy ◽  
Valérie Orsat ◽  
Vijaya Raghavan
Keyword(s):  
Fluidized Bed ◽  
Drying Process ◽  
Drying Time ◽  
Fluidized Bed Dryer ◽  
Microwave Assisted ◽  
Air Temperatures ◽  
Quality Product ◽  
Fluidized Bed Drying ◽  
Power Densities ◽  
Kinetics Of

The drying kinetics of celery in a microwave assisted fluidized bed dryer was studied at different drying air temperatures (45°C, 55°C and 65°C) and at different initial microwave power densities (0W/g, 1W/g and 2W/g). Dried product quality, product mass, air temperature, air relative humidity, and electric power consumption were used to monitor the performance of the drying process. The results showed that the Midilli-Kucuk model was best in predicting the moisture ratio as a function of drying time. At any given temperature, the utilization of the microwave energy reduced by more than 50% the drying time. Keywords: drying; celery; MWFBD

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