Rotary Drying

2020 ◽  
pp. 161-183
Author(s):  
John J. Kelly
Keyword(s):  
2015 ◽  
Vol 41 ◽  
pp. 38-46 ◽  
Author(s):  
Xin Wang ◽  
Bin Qin ◽  
Haijun Xu ◽  
Wanli Zhu

2019 ◽  
Vol 9 (3) ◽  
pp. 519 ◽  
Author(s):  
Diógenes Hernández ◽  
Héctor Quinteros-Lama ◽  
Claudio Tenreiro ◽  
David Gabriel

In the industrial production of olive oil, both solid wastes and those produced from their incineration are a serious environmental problem since only 20% w/w of the fruit becomes oil and the rest is waste, mainly orujo and alperujo. A key aspect to transforming these wastes into an important source of energy such as pellets is to recognize the most appropriate time of the year for waste drying, with the objective of minimizing the environmental impact of the volatile compounds contained in the waste. In this work, the emissions produced during thermal-mechanical drying were studied throughout a period of six months of waste storage in which alperujo and orujo were stored in open containers under uncontrolled environmental conditions. The studied emissions were produced when both wastes were dried in a pilot rotary drying trommel at 450 °C to reduce their initial humidity of around 70–80% w/w to 10–15% w/w. Results indicated that when the storage time of the wastes in the uncontrolled environments increased, the emission of odorant compounds during drying also increased as a consequence of the biological and chemical processes occurring in the containers. The main odorant VOCs were quantified monthly for six months at the outlet of the drying trommel. It was determined that the drying of this type of waste could be carried out properly until the third month of storage. Afterwards, the concentration of most VOCs produced widely exceeded the odor thresholds of selected compounds.


2013 ◽  
Vol 448-453 ◽  
pp. 3523-3531
Author(s):  
Jing Ma ◽  
Xiao Long Lei ◽  
Rong Chao Ma

In order to optimize the structure and technology parameters of rotary drying, mathematical models of effective residence time and mass of loading were established based on the motion of solid particles in rotary dryer. Uniform design was applied in experimental design with material of rapeseed. Four independent variables such as structural parameter (cylinder inclination angle) and operating parameters (the rotation speed of rotary dryer, solids feed speed and airflow speed) were investigated. Prediction models of effective residence time and mass of loading were established by using software DPS7.05 to optimize the experimental design. The experiment results showed that under experimental conditions, the effects of airflow speed, rotation speed, the interaction of rotation speed with airflow speed and the interaction of rotation speed with solids feed speed on effective residence time were significant. Rotation speed, airflow speed, the interaction of cylinder inclination angle with solids feed speed and the interaction of feed speed with airflow speed had significant influences on mass of loading. By optimizing with multiple objective programming, the optimal parameters were obtained as follow: cylinder inclination angle of 1.8°, rotation speed of rotary dryer of 4 r/min, solids feed speed of 2.5 kg/s and airflow speed of 2.4 m/s. The research has important significance to well improve structure and technology parameters of rotary drying technology in solids drying.


LWT ◽  
2022 ◽  
pp. 113047
Author(s):  
Ricardo Lemos Monteiro ◽  
Jaqueline Oliveira de Moraes ◽  
Aline Iamin Gomide ◽  
Bruno Augusto Mattar Carciofi ◽  
João Borges Laurindo

2021 ◽  
Vol 3 (2) ◽  
pp. 86-89
Author(s):  
Najira Najira ◽  
Ica Veronika Maha ◽  
Titi Lestia Sriwahyuni ◽  
Nurfadillah Nurfadillah ◽  
Nurul Kholiza Priani ◽  
...  

Gampong Kuala Leuge, Peureulak District is one of the National Priority Rural Areas (KPPN) which has been designated as a Capture and Cultivation Minapolitan area by the Ministry of Marine Affairs and Fisheries because most of its people are fishermen. The conditions faced by the community regarding climate and weather, when the weather is hot, it is very easy to dry the fish, while in the rainy season generally, the salted fish will decrease. Thus, household scale competition also faces increasing competition in the digital age because people still use traditional tools and are very dependent on the climate. Therefore, in an effort to balance the competition it is necessary to increase the quality, productivity, and efficiency of the business by taking into account the aspects of food safety through the activities of the Village Development and Empowerment Holistic Program by creating a Rotary Drying System technology as a substitute for stocking to ensure the quality of fish and avoid contamination of microorganisms. From the problems obtained in the form of the dependence of the drying process on weather conditions so that salted fish products are not optimal, conventional marketing techniques have changed to modern ones by providing online shops, and financial management that has not been recorded properly has changed using digital transaction software.  


2021 ◽  
Vol 11 (17) ◽  
pp. 8205
Author(s):  
Shunpeng Pang ◽  
Junhua Jia ◽  
Xiangqian Ding ◽  
Shusong Yu ◽  
Yang Liu

The drying process is fundamental for cut tobacco processing. However, there are some problems related to the drying process such as overheating, or inconsistent control of moisture content. This paper shows how an intelligent controller is designed for an industrial rotary drying system. This controller is applied to a tobacco production unit to reduce overdried cut tobacco and improve the overall unit performance. The proposed control system aims to keep the content of moisture at the dryer outlet as close as possible to the optimal value and improve the homogeneity of the product without any operator intervention. The study shows that, if a reduction of humidity in the cut tobacco drying process is achieved using AI, the quality of the final product improves. In particular, if compared to regulatory control, the proposed method constantly monitors and adjusts the moisture content level in order to reduce the amount of overdried product. The findings of this paper indicate that the suggested process can save at least 222.2 kg of cut tobacco for each batch in the first stage of the drying process.


2014 ◽  
Vol 802 ◽  
pp. 203-208
Author(s):  
B.C. Silvério ◽  
I.A. Resende ◽  
D.B. Santos ◽  
C.R. Duarte ◽  
M.A.S. Barrozo

Rotary dryers are a significant capital item for many industrial plants. Many potential benefits can be obtained through a greater understanding of the rotary drying process. In order to improve drying efficacy, a novel version of the rotary dryer, known as the rotoaerated dryer, was evaluated in previous studies. This work has studied the effect of the configuration and arrangement of mini-pipes in the rotoaerated dryers by experimental and CFD techniques. The results obtained showed that it was possible to predict the effect of variations in the configuration of the rotoaerated dryer and obtain the more appropriate arrangement of mini-pipes.


2014 ◽  
Vol 1044-1045 ◽  
pp. 232-235
Author(s):  
J. Laohavanich ◽  
S. Yangyuen ◽  
N. Thowjantuek

An investigation of radiant heat distribution on drying area in the chamber of infrared-rotary dryer (IRD) was conducted by measuring the values of infrared radiation on drum surface of the dryer chamber and then showed in term of surface temperature (ST). A gas-fired infrared burner (GIB) was used as the heat source, radiated the electromagnetic wave in the length of near-infrared ray. The drum surface was set as an infrared radiant absorbing area, installed with type K thermocouples and set as grid. Different levels of drum diameters (D=700, 900 and 1100 mm.), infrared peak wavelengths (IRP=3.32, 2.97 and 2.70 micron), distances between GIB and drum surface (H=300, 400 and 500 mm.), grid positions on drum surface (longitudinal direction (L) and radial direction (W) = 900 x 900 mm2) were applied. Then, distribution of surface temperature values was analyzed, based on response surface methodology (RSM) obtained from a second order polynomial model. The results showed that IR and H were the main factors affecting the radiant heat distribution. Then, the surface plots of ST levels on the absorbing drum surfaces in the rotary drying chamber were constructed. The contour plot results were indicative of a use for the design and selection of an appropriate size of area for drying with uniform distribution of IR in accordance with user-defined parameters.


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