Drying of Lignite of Various Origins in a Pilot Scale Toroidal Fluidized Bed Dryer using Low Quality Heat
An experimental study was carried out for lignites of different places of origin, i.e., Poland, Greece, Romania and Australia, using a toroidal bed dryer. The effect of the temperature on the drying efficiency, including the loss of moisture content over time under fixed drying conditions was the su...
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| Format: | Article |
| Language: | English |
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MDPI AG
2019-03-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/12/7/1191 |
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| author | Halina Pawlak–Kruczek Michał Czerep Lukasz Niedzwiecki Emmanouil Karampinis Ioannis Violidakis Ioannis Avagianos Panagiotis Grammelis |
| author_facet | Halina Pawlak–Kruczek Michał Czerep Lukasz Niedzwiecki Emmanouil Karampinis Ioannis Violidakis Ioannis Avagianos Panagiotis Grammelis |
| author_sort | Halina Pawlak–Kruczek |
| collection | DOAJ |
| description | An experimental study was carried out for lignites of different places of origin, i.e., Poland, Greece, Romania and Australia, using a toroidal bed dryer. The effect of the temperature on the drying efficiency, including the loss of moisture content over time under fixed drying conditions was the subject of the investigation. The main goal was to confirm the possibility of the use of a toroidal bed as a base for a drying system that could utilize low quality heat from sources such as flue gases from a boiler and determine the optimum parameters for such a system. The conducted study has conclusively proven the feasibility of the use of low temperature heat sources for drying lignite in a toroidal bed. A moisture content of 20% could be achieved for most of the tested lignites, using the toroidal bed, with reasonably short residence times (approx. 30 min) and an air temperature as low as 60 °C. Moreover, the change of the particle size distribution, to some degree, affected the final moisture content due to the entrainment of wet, fine particles. The study also determined that the in-bed attrition of the particles is partially responsible for the generation of fines. |
| first_indexed | 2024-04-11T13:58:58Z |
| format | Article |
| id | doaj.art-24b9ffed907b4b1e9b7901d321fcff3d |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-04-11T13:58:58Z |
| publishDate | 2019-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-24b9ffed907b4b1e9b7901d321fcff3d2022-12-22T04:20:11ZengMDPI AGEnergies1996-10732019-03-01127119110.3390/en12071191en12071191Drying of Lignite of Various Origins in a Pilot Scale Toroidal Fluidized Bed Dryer using Low Quality HeatHalina Pawlak–Kruczek0Michał Czerep1Lukasz Niedzwiecki2Emmanouil Karampinis3Ioannis Violidakis4Ioannis Avagianos5Panagiotis Grammelis6Wroclaw University of Science and Technology, Faculty of Mechanical and Power Engineering, Department of Boilers, Combustion and Energy Processes, 59-400 Wrocław, PolandWroclaw University of Science and Technology, Faculty of Mechanical and Power Engineering, Department of Boilers, Combustion and Energy Processes, 59-400 Wrocław, PolandWroclaw University of Science and Technology, Faculty of Mechanical and Power Engineering, Department of Boilers, Combustion and Energy Processes, 59-400 Wrocław, PolandCentre for Research and Technology Hellas, Chemical Process and Energy Resources Institute, GR 502 00 Ptolemais, GreeceCentre for Research and Technology Hellas, Chemical Process and Energy Resources Institute, GR 502 00 Ptolemais, GreeceCentre for Research and Technology Hellas, Chemical Process and Energy Resources Institute, GR 502 00 Ptolemais, GreeceCentre for Research and Technology Hellas, Chemical Process and Energy Resources Institute, GR 502 00 Ptolemais, GreeceAn experimental study was carried out for lignites of different places of origin, i.e., Poland, Greece, Romania and Australia, using a toroidal bed dryer. The effect of the temperature on the drying efficiency, including the loss of moisture content over time under fixed drying conditions was the subject of the investigation. The main goal was to confirm the possibility of the use of a toroidal bed as a base for a drying system that could utilize low quality heat from sources such as flue gases from a boiler and determine the optimum parameters for such a system. The conducted study has conclusively proven the feasibility of the use of low temperature heat sources for drying lignite in a toroidal bed. A moisture content of 20% could be achieved for most of the tested lignites, using the toroidal bed, with reasonably short residence times (approx. 30 min) and an air temperature as low as 60 °C. Moreover, the change of the particle size distribution, to some degree, affected the final moisture content due to the entrainment of wet, fine particles. The study also determined that the in-bed attrition of the particles is partially responsible for the generation of fines.https://www.mdpi.com/1996-1073/12/7/1191dryinglignitetoroidal bedattritionenergy efficiency |
| spellingShingle | Halina Pawlak–Kruczek Michał Czerep Lukasz Niedzwiecki Emmanouil Karampinis Ioannis Violidakis Ioannis Avagianos Panagiotis Grammelis Drying of Lignite of Various Origins in a Pilot Scale Toroidal Fluidized Bed Dryer using Low Quality Heat Energies drying lignite toroidal bed attrition energy efficiency |
| title | Drying of Lignite of Various Origins in a Pilot Scale Toroidal Fluidized Bed Dryer using Low Quality Heat |
| title_full | Drying of Lignite of Various Origins in a Pilot Scale Toroidal Fluidized Bed Dryer using Low Quality Heat |
| title_fullStr | Drying of Lignite of Various Origins in a Pilot Scale Toroidal Fluidized Bed Dryer using Low Quality Heat |
| title_full_unstemmed | Drying of Lignite of Various Origins in a Pilot Scale Toroidal Fluidized Bed Dryer using Low Quality Heat |
| title_short | Drying of Lignite of Various Origins in a Pilot Scale Toroidal Fluidized Bed Dryer using Low Quality Heat |
| title_sort | drying of lignite of various origins in a pilot scale toroidal fluidized bed dryer using low quality heat |
| topic | drying lignite toroidal bed attrition energy efficiency |
| url | https://www.mdpi.com/1996-1073/12/7/1191 |
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