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Search Results (2)

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Keywords = screw-type dryer

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15 pages, 8193 KiB  
Article
Optimization of Screw Mixer to Improve Drying Performance of Livestock Manure Dryer Using CFD Analysis
by Gunyoung Park, Taejin Eom, Hyoseo Kwak and Chul Kim
Appl. Sci. 2022, 12(6), 2872; https://doi.org/10.3390/app12062872 - 10 Mar 2022
Cited by 2 | Viewed by 2947
Abstract
Scarcity of fossil fuels and their emissions of fossil fuel pollutants, such as carbon dioxide, into the atmosphere, and the resulting consequences, have led energy policymakers to look for alternative renewable and clean energy sources. The use of animal wastes is one of [...] Read more.
Scarcity of fossil fuels and their emissions of fossil fuel pollutants, such as carbon dioxide, into the atmosphere, and the resulting consequences, have led energy policymakers to look for alternative renewable and clean energy sources. The use of animal wastes is one of the very promising renewable energy alternatives paving the way for a more sustainable energy network. Animal manure produced by livestock farms has a moisture content of about 80%, and such livestock manure is dehydrated to a moisture content of 20–25% and solidified to be used as biomass and fuel for thermal power plants. Previous studies on manure dryers have been concentrated on convection-type dryers, but this type of dryer has the disadvantage of inadequate processing capacity per hour because it cannot agitate manure. In this study, to deal with the drawbacks of conventional livestock manure drying methods, a screw-type dryer was proposed. CFD analysis of the dryer was performed by selecting the viscosity of livestock manure and design parameters of the screw using Ansys Workbench. Through the response surface method, optimal design of the screw shape for the improvement of drying efficiency and smooth discharge of residual manure was carried out. Full article
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10 pages, 1414 KiB  
Article
An Experimental Technology of Drying and Clean Combustion of Biomass Residues
by Awf Al-Kassir, Pedro Coelho, Justo García-Sanz-Calcedo, Francisco J. Moral, Raúl Kassir Al-Karany and Talal Yusaf
Appl. Sci. 2018, 8(6), 905; https://doi.org/10.3390/app8060905 - 1 Jun 2018
Cited by 15 | Viewed by 3501
Abstract
In the present study, the drying and combustion of solid biomass residues are developed. The combustion of the residues inside a boiler and a stove have been done. We used three types of solid biomass residues (i.e., cork, pine pellet and olive pomace). [...] Read more.
In the present study, the drying and combustion of solid biomass residues are developed. The combustion of the residues inside a boiler and a stove have been done. We used three types of solid biomass residues (i.e., cork, pine pellet and olive pomace). These residues have been dried by using screw dryers. Experimental installation has been used for a series of thermal drying tests of the residues by measuring the temperature inside the dryer and their moisture contents. A laboratory screw dryer was used to dry the olive pomace by using hot gases from a chimney of a biomass stove. Elemental and proximate analyses, as well as the higher heating value (HHV) of the raw materials, have been determined. In the experiments, moisture content variation of the residues and drying temperatures are obtained. These residues are dried several times under the same drying conditions to achieve the final moisture content rate. On the other hand, the temperature of combustion chamber of the boiler has been measured under different conditions. It has been found that by increasing hot gas temperature, the drying rate is increased. Finally, it has been found that the drying of these residues increases their calorific values and reduces the emissions. Full article
(This article belongs to the Section Energy Science and Technology)
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