Model predictions and experimental results on self-heating prevention of stockpiled coals

The spontaneous combustion of coal stockpiles is a serious economic and safety problem. This phenomenon is herein analysed using a TNO-model modified to predict the spontaneous heating behaviour of coal piles built with “Mezcla”, a mixture of low rank coals from Teruel (Spain). The simulation carrie...

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Authors: Fierro, Vanessa, Miranda Ibáñez, José Luis, Romero, Clemente, Andrés Gimeno, José Manuel, Arriaga, A., Schmal, D.
Format: article
Publication Date:2000
Country:España
Institution:Consejo Superior de Investigaciones Científicas (CSIC)
Repository:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/167871
Online Access:http://hdl.handle.net/10261/167871
Access Level:Open access
Keyword:Coal
Stockpiles
Spontaneous heating
Modelling
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spelling Model predictions and experimental results on self-heating prevention of stockpiled coalsFierro, VanessaMiranda Ibáñez, José LuisRomero, ClementeAndrés Gimeno, José ManuelArriaga, A.Schmal, D.CoalStockpilesSpontaneous heatingModellingThe spontaneous combustion of coal stockpiles is a serious economic and safety problem. This phenomenon is herein analysed using a TNO-model modified to predict the spontaneous heating behaviour of coal piles built with “Mezcla”, a mixture of low rank coals from Teruel (Spain). The simulation carried out with the mathematical model for this coal showed that the pile porosity or voidage and wind speed play an important role, although voidage is decisive and controls the effect of the wind velocity. To reduce the negative effects of both factors, five test coal piles (2000–3000 t) were built and several measures were applied to four of them: periodic compaction, use of a low angle slope, protection of the stockpiled coal with an artificial wind barrier and covering it with an ash–water slurry. The heat losses were experimentally determined and it was found that the mathematical model gave predictions of the right order of magnitude of time, site of spontaneous combustion and magnitude of calorific losses. All the methods of protection applied to decrease the self-heating of coal were effective, but the experimental results indicate that the most economical way to avoid the heat losses is the use of an ash–water slurry to cover the coal pile.The authors gratefully acknowledge the financial support provided by ECSC under contract number 7220-EA/754 and ENDESA which made it possible to carry out this research.Peer reviewedElsevierEuropean Coal and Steel CommunityFundación EndesaConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]201820182000info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501http://hdl.handle.net/10261/167871reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttps://doi.org/10.1016/S0016-2361(00)00062-4Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/1678712026-05-22T06:33:51Z
dc.title.none.fl_str_mv Model predictions and experimental results on self-heating prevention of stockpiled coals
title Model predictions and experimental results on self-heating prevention of stockpiled coals
spellingShingle Model predictions and experimental results on self-heating prevention of stockpiled coals
Fierro, Vanessa
Coal
Stockpiles
Spontaneous heating
Modelling
title_short Model predictions and experimental results on self-heating prevention of stockpiled coals
title_full Model predictions and experimental results on self-heating prevention of stockpiled coals
title_fullStr Model predictions and experimental results on self-heating prevention of stockpiled coals
title_full_unstemmed Model predictions and experimental results on self-heating prevention of stockpiled coals
title_sort Model predictions and experimental results on self-heating prevention of stockpiled coals
dc.creator.none.fl_str_mv Fierro, Vanessa
Miranda Ibáñez, José Luis
Romero, Clemente
Andrés Gimeno, José Manuel
Arriaga, A.
Schmal, D.
author Fierro, Vanessa
author_facet Fierro, Vanessa
Miranda Ibáñez, José Luis
Romero, Clemente
Andrés Gimeno, José Manuel
Arriaga, A.
Schmal, D.
author_role author
author2 Miranda Ibáñez, José Luis
Romero, Clemente
Andrés Gimeno, José Manuel
Arriaga, A.
Schmal, D.
author2_role author
author
author
author
author
dc.contributor.none.fl_str_mv European Coal and Steel Community
Fundación Endesa
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Coal
Stockpiles
Spontaneous heating
Modelling
topic Coal
Stockpiles
Spontaneous heating
Modelling
description The spontaneous combustion of coal stockpiles is a serious economic and safety problem. This phenomenon is herein analysed using a TNO-model modified to predict the spontaneous heating behaviour of coal piles built with “Mezcla”, a mixture of low rank coals from Teruel (Spain). The simulation carried out with the mathematical model for this coal showed that the pile porosity or voidage and wind speed play an important role, although voidage is decisive and controls the effect of the wind velocity. To reduce the negative effects of both factors, five test coal piles (2000–3000 t) were built and several measures were applied to four of them: periodic compaction, use of a low angle slope, protection of the stockpiled coal with an artificial wind barrier and covering it with an ash–water slurry. The heat losses were experimentally determined and it was found that the mathematical model gave predictions of the right order of magnitude of time, site of spontaneous combustion and magnitude of calorific losses. All the methods of protection applied to decrease the self-heating of coal were effective, but the experimental results indicate that the most economical way to avoid the heat losses is the use of an ash–water slurry to cover the coal pile.
publishDate 2000
dc.date.none.fl_str_mv 2000
2018
2018
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/167871
url http://hdl.handle.net/10261/167871
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv https://doi.org/10.1016/S0016-2361(00)00062-4
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15.81155

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