Estudo da formação e remoção de tortas de filtração de gases em filtros de tecidos de polipropileno e de algodão.
Autor(a) principal: | |
---|---|
Data de Publicação: | 2004 |
Tipo de documento: | Dissertação |
Idioma: | por |
Título da fonte: | Repositório Institucional da UFSCAR |
Texto Completo: | https://repositorio.ufscar.br/handle/ufscar/4060 |
Resumo: | The purpose of this work is to evaluate and to compare, in the processes of cake formation and remotion in the gases filtration with Bag Filters, the behavior of a filter made of natural fibers fabric with other made of synthetic fibers. The fabrics compared were a woven cotton with granite texture of 0.735 kg/m² and a non woven polypropylene of 0.600 kg/m². The experimental apparatus consisted of a circular filter with 0.023 m² in area, a powder feeder with controlled powder flow rate and humidity, linked with a microcomputer and a system to collect de data. The particle material was a phosphatic concentrated of density 2.79 x 10³ kg/m³ with mean particle diameter of 4.55 x 10-6 m. In the realization of this work, they were accomplished filtering procedures of the particle material in samples of the mentioned fabrics and cake remotion procedures with reverse air flow procedure, in order to determine the cake removing tension by the method proposed by Seville et al. (1989), also being evaluated other filtration and remotion aspects and data. In order to compare e evaluated the behavior of the fabrics in job conditions, they were also accomplished successive filtration and cleaning cycles in both fabrics until they become particle material saturated. During filtration four gas velocities were employed (4.5; 6.0; 7.5 and 9.0 cm/s), the flow rate was adjusted to 2.0 x 10-5 kg/s (11% of the feeder total velocity) and three maximum pressure drops across the filter were employed (300 mmH2O, 400 mmH2O and 500 mmH2O). In the cleaning steps six cleaning gas velocities were employed (1.6 cm/s; 3.0 cm/s; 9.0 cm/s; 12.0 cm/s; 15.0 cm/s and 18.0 cm/s). In the successive filtration and cleaning cycles they were employed gas filtration velocity of 6.0 cm/s, filtration final pressure drop of 400 mmH2O and gas cleaning velocity of 18.0 cm/s. The polypropylene fabric has taken more cycles to be saturated with the powder in the filtration and cleaning cycles and presented a greater cleaning degree in the cleaning processes, 77% in average, than the cotton that presented 39% of cake removal in average. The polypropylene fabric porosity was found to be greather than the cotton fabric ones. The cake-fabric adhesion force per unit of area has increased with the increase of the filtration gas velocity for both clothes, being remarkable that the polypropylene fabric has presented greather values than the cotton fabric, especially for the cakes formed with filtration gas velocities of 6.0 and 7.5 cm/s. It was also observed that the cake plaques, removed in the cleaning procedures, have increased in size with the increase of the cake removed portion and with the cake mass per unit of area for both studied fabrics. |
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Rodrigues, Antonio Carlos MarquesAguiar, Mônica Lopeshttp://lattes.cnpq.br/0431688649128529http://genos.cnpq.br:12010/dwlattes/owa/prc_imp_cv_int?f_cod=K4739870T247e197e9-29d8-487d-9aa5-1efe3beea49c2016-06-02T19:56:41Z2005-01-062016-06-02T19:56:41Z2004-06-15RODRIGUES, Antonio Carlos Marques. Estudo da formação e remoção de tortas de filtração de gases em filtros de tecidos de polipropileno e de algodão.. 2004. 148 f. Dissertação (Mestrado em Ciências Exatas e da Terra) - Universidade Federal de São Carlos, São Carlos, 2004.https://repositorio.ufscar.br/handle/ufscar/4060The purpose of this work is to evaluate and to compare, in the processes of cake formation and remotion in the gases filtration with Bag Filters, the behavior of a filter made of natural fibers fabric with other made of synthetic fibers. The fabrics compared were a woven cotton with granite texture of 0.735 kg/m² and a non woven polypropylene of 0.600 kg/m². The experimental apparatus consisted of a circular filter with 0.023 m² in area, a powder feeder with controlled powder flow rate and humidity, linked with a microcomputer and a system to collect de data. The particle material was a phosphatic concentrated of density 2.79 x 10³ kg/m³ with mean particle diameter of 4.55 x 10-6 m. In the realization of this work, they were accomplished filtering procedures of the particle material in samples of the mentioned fabrics and cake remotion procedures with reverse air flow procedure, in order to determine the cake removing tension by the method proposed by Seville et al. (1989), also being evaluated other filtration and remotion aspects and data. In order to compare e evaluated the behavior of the fabrics in job conditions, they were also accomplished successive filtration and cleaning cycles in both fabrics until they become particle material saturated. During filtration four gas velocities were employed (4.5; 6.0; 7.5 and 9.0 cm/s), the flow rate was adjusted to 2.0 x 10-5 kg/s (11% of the feeder total velocity) and three maximum pressure drops across the filter were employed (300 mmH2O, 400 mmH2O and 500 mmH2O). In the cleaning steps six cleaning gas velocities were employed (1.6 cm/s; 3.0 cm/s; 9.0 cm/s; 12.0 cm/s; 15.0 cm/s and 18.0 cm/s). In the successive filtration and cleaning cycles they were employed gas filtration velocity of 6.0 cm/s, filtration final pressure drop of 400 mmH2O and gas cleaning velocity of 18.0 cm/s. The polypropylene fabric has taken more cycles to be saturated with the powder in the filtration and cleaning cycles and presented a greater cleaning degree in the cleaning processes, 77% in average, than the cotton that presented 39% of cake removal in average. The polypropylene fabric porosity was found to be greather than the cotton fabric ones. The cake-fabric adhesion force per unit of area has increased with the increase of the filtration gas velocity for both clothes, being remarkable that the polypropylene fabric has presented greather values than the cotton fabric, especially for the cakes formed with filtration gas velocities of 6.0 and 7.5 cm/s. It was also observed that the cake plaques, removed in the cleaning procedures, have increased in size with the increase of the cake removed portion and with the cake mass per unit of area for both studied fabrics.O objetivo deste trabalho é avaliar e comparar, no processo de formação e de remoção de tortas de filtração de gases em Filtros de Manga, o comportamento de um meio filtrante constituído de tecido entrelaçado, de fibras naturais, com outro constituído de tecido não entrelaçado, de fibras sintéticas. Os tecidos estudados foram algodão, constituído de fibras naturais, com textura granite e de gramatura 0,735 kg/m² e feltro agulhado de polipropileno, constituído de fibras sintéticas não entrelaçadas e de gramatura 0,600 kg/m². A célula experimental era constituída por um filtro circular de área livre para filtração de 0,023 m², um alimentador de pó com a vazão mássica e umidade controladas, um microcomputador e um sistema para controle e aquisição de dados. O material pulverulento utilizado foi um concentrado fosfático de densidade 2,79 x 10³ kg/m³ cujo diâmetro médio de partícula era de 4,55 x 10-6 m. Na realização deste trabalho, foram efetuadas filtrações do material pulverulento em amostras dos tecidos citados e remoção das tortas formadas pelo processo de fluxo de ar reverso, para obtenção das tensões de remoção das tortas pelo método proposto por Seville et al. (1989) . Foram ainda realizados ciclos sucessivos de filtração e limpeza em ambos os tecidos até a sua saturação, a fim de se avaliar e comparar o comportamento dos tecidos numa situação típica de trabalho, em que o tecido de polipropileno levou mais ciclos para saturar do que o algodão. Nos procedimentos de filtração foram utilizadas quatro velocidades de gás (4,5 ; 6,0 ; 7,5 e 9,0 cm/s ), vazão mássica de pó ajustada para 2,0 x 10-5 kg/s. (11% da rotação do prato de alimentação) e três quedas finais de pressão de filtração (300; 400 e 500 mmH2O). Nos procedimentos de remoção por fluxo de ar reverso foram utilizadas seis velocidades de gás (1,6 ; 3,0 ; 9,0 ; 12,0 ; 15,0 e 18,0 cm/s). Nos ciclos sucessivos de filtração e limpeza foi utilizada velocidade de filtração de 6,0 cm/s, queda de pressão final de filtração de 400 mmH2O e velocidade de limpeza de 18,0 cm/s. Nos processos de remoção, o tecido de polipropileno apresentou maior grau de limpeza das tortas, em média 77 %, comparado com o algodão que apresentou frações removidas em média de 39%. O tecido de polipropileno também apresentou maior porosidade do que o tecido de algodão. A tensão de remoção das tortas dos tecidos aumentou com o aumento da velocidade de filtração para ambos os tecidos, sendo que o tecido de polipropileno apresentou tensões de remoção maiores que as apresentadas pelo tecido algodão, notadamente para as tortas obtidas com velocidades de filtração de 6,0 e 7,5 cm/s. Como constatação secundária, observou-se que o tamanho das placas de torta, removidas nos procedimentos de limpeza dos tecidos, aumentou com o aumento da fração de torta removida para ambos os tecidos estudados.application/pdfporUniversidade Federal de São CarlosPrograma de Pós-Graduação em Engenharia Química - PPGEQUFSCarBRFiltraçãoFiltros de mangaFiltros de tecidoENGENHARIAS::ENGENHARIA QUIMICAEstudo da formação e remoção de tortas de filtração de gases em filtros de tecidos de polipropileno e de algodão.info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesis-1-1cfe199c5-37b6-4d5a-a38c-e0503b6b1995info:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFSCARinstname:Universidade Federal de São Carlos (UFSCAR)instacron:UFSCARORIGINALDissACMR.pdfapplication/pdf2186431https://repositorio.ufscar.br/bitstream/ufscar/4060/1/DissACMR.pdff8e0d1c02533f24eb6a4a0c25a013cc5MD51THUMBNAILDissACMR.pdf.jpgDissACMR.pdf.jpgIM Thumbnailimage/jpeg9552https://repositorio.ufscar.br/bitstream/ufscar/4060/2/DissACMR.pdf.jpg53320113f72f8f7b3900d9b2e4d4f1ffMD52ufscar/40602023-09-18 18:30:59.482oai:repositorio.ufscar.br:ufscar/4060Repositório InstitucionalPUBhttps://repositorio.ufscar.br/oai/requestopendoar:43222023-09-18T18:30:59Repositório Institucional da UFSCAR - Universidade Federal de São Carlos (UFSCAR)false |
dc.title.por.fl_str_mv |
Estudo da formação e remoção de tortas de filtração de gases em filtros de tecidos de polipropileno e de algodão. |
title |
Estudo da formação e remoção de tortas de filtração de gases em filtros de tecidos de polipropileno e de algodão. |
spellingShingle |
Estudo da formação e remoção de tortas de filtração de gases em filtros de tecidos de polipropileno e de algodão. Rodrigues, Antonio Carlos Marques Filtração Filtros de manga Filtros de tecido ENGENHARIAS::ENGENHARIA QUIMICA |
title_short |
Estudo da formação e remoção de tortas de filtração de gases em filtros de tecidos de polipropileno e de algodão. |
title_full |
Estudo da formação e remoção de tortas de filtração de gases em filtros de tecidos de polipropileno e de algodão. |
title_fullStr |
Estudo da formação e remoção de tortas de filtração de gases em filtros de tecidos de polipropileno e de algodão. |
title_full_unstemmed |
Estudo da formação e remoção de tortas de filtração de gases em filtros de tecidos de polipropileno e de algodão. |
title_sort |
Estudo da formação e remoção de tortas de filtração de gases em filtros de tecidos de polipropileno e de algodão. |
author |
Rodrigues, Antonio Carlos Marques |
author_facet |
Rodrigues, Antonio Carlos Marques |
author_role |
author |
dc.contributor.authorlattes.por.fl_str_mv |
http://genos.cnpq.br:12010/dwlattes/owa/prc_imp_cv_int?f_cod=K4739870T2 |
dc.contributor.author.fl_str_mv |
Rodrigues, Antonio Carlos Marques |
dc.contributor.advisor1.fl_str_mv |
Aguiar, Mônica Lopes |
dc.contributor.advisor1Lattes.fl_str_mv |
http://lattes.cnpq.br/0431688649128529 |
dc.contributor.authorID.fl_str_mv |
47e197e9-29d8-487d-9aa5-1efe3beea49c |
contributor_str_mv |
Aguiar, Mônica Lopes |
dc.subject.por.fl_str_mv |
Filtração Filtros de manga Filtros de tecido |
topic |
Filtração Filtros de manga Filtros de tecido ENGENHARIAS::ENGENHARIA QUIMICA |
dc.subject.cnpq.fl_str_mv |
ENGENHARIAS::ENGENHARIA QUIMICA |
description |
The purpose of this work is to evaluate and to compare, in the processes of cake formation and remotion in the gases filtration with Bag Filters, the behavior of a filter made of natural fibers fabric with other made of synthetic fibers. The fabrics compared were a woven cotton with granite texture of 0.735 kg/m² and a non woven polypropylene of 0.600 kg/m². The experimental apparatus consisted of a circular filter with 0.023 m² in area, a powder feeder with controlled powder flow rate and humidity, linked with a microcomputer and a system to collect de data. The particle material was a phosphatic concentrated of density 2.79 x 10³ kg/m³ with mean particle diameter of 4.55 x 10-6 m. In the realization of this work, they were accomplished filtering procedures of the particle material in samples of the mentioned fabrics and cake remotion procedures with reverse air flow procedure, in order to determine the cake removing tension by the method proposed by Seville et al. (1989), also being evaluated other filtration and remotion aspects and data. In order to compare e evaluated the behavior of the fabrics in job conditions, they were also accomplished successive filtration and cleaning cycles in both fabrics until they become particle material saturated. During filtration four gas velocities were employed (4.5; 6.0; 7.5 and 9.0 cm/s), the flow rate was adjusted to 2.0 x 10-5 kg/s (11% of the feeder total velocity) and three maximum pressure drops across the filter were employed (300 mmH2O, 400 mmH2O and 500 mmH2O). In the cleaning steps six cleaning gas velocities were employed (1.6 cm/s; 3.0 cm/s; 9.0 cm/s; 12.0 cm/s; 15.0 cm/s and 18.0 cm/s). In the successive filtration and cleaning cycles they were employed gas filtration velocity of 6.0 cm/s, filtration final pressure drop of 400 mmH2O and gas cleaning velocity of 18.0 cm/s. The polypropylene fabric has taken more cycles to be saturated with the powder in the filtration and cleaning cycles and presented a greater cleaning degree in the cleaning processes, 77% in average, than the cotton that presented 39% of cake removal in average. The polypropylene fabric porosity was found to be greather than the cotton fabric ones. The cake-fabric adhesion force per unit of area has increased with the increase of the filtration gas velocity for both clothes, being remarkable that the polypropylene fabric has presented greather values than the cotton fabric, especially for the cakes formed with filtration gas velocities of 6.0 and 7.5 cm/s. It was also observed that the cake plaques, removed in the cleaning procedures, have increased in size with the increase of the cake removed portion and with the cake mass per unit of area for both studied fabrics. |
publishDate |
2004 |
dc.date.issued.fl_str_mv |
2004-06-15 |
dc.date.available.fl_str_mv |
2005-01-06 2016-06-02T19:56:41Z |
dc.date.accessioned.fl_str_mv |
2016-06-02T19:56:41Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
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info:eu-repo/semantics/masterThesis |
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masterThesis |
status_str |
publishedVersion |
dc.identifier.citation.fl_str_mv |
RODRIGUES, Antonio Carlos Marques. Estudo da formação e remoção de tortas de filtração de gases em filtros de tecidos de polipropileno e de algodão.. 2004. 148 f. Dissertação (Mestrado em Ciências Exatas e da Terra) - Universidade Federal de São Carlos, São Carlos, 2004. |
dc.identifier.uri.fl_str_mv |
https://repositorio.ufscar.br/handle/ufscar/4060 |
identifier_str_mv |
RODRIGUES, Antonio Carlos Marques. Estudo da formação e remoção de tortas de filtração de gases em filtros de tecidos de polipropileno e de algodão.. 2004. 148 f. Dissertação (Mestrado em Ciências Exatas e da Terra) - Universidade Federal de São Carlos, São Carlos, 2004. |
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https://repositorio.ufscar.br/handle/ufscar/4060 |
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Universidade Federal de São Carlos |
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UFSCar |
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BR |
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Universidade Federal de São Carlos |
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