Secado de maderas tropicales en estufas convencionales
Some of the drying problems of tropical species in conventional kilns are associated with the diversity of their technological properties, with the difficulty of gathering adequate volumes of the same species to apply them a drying schedule according to the wood characteristics, and with the high co...
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| Materiálatiipa: | Online |
| Giella: | spa |
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Instituto de Ecología, A.C.
2016
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| Liŋkkat: | https://myb.ojs.inecol.mx/index.php/myb/article/view/1341 |
| _version_ | 1799769296028565504 |
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| author | Zavala Zavala, David |
| author_facet | Zavala Zavala, David |
| author_sort | Zavala Zavala, David |
| collection | MYB |
| description | Some of the drying problems of tropical species in conventional kilns are associated with the diversity of their technological properties, with the difficulty of gathering adequate volumes of the same species to apply them a drying schedule according to the wood characteristics, and with the high cost of the process that determines the profitable capacity of the kilns and limits its utilization to dry small volumes of lumber. An alternative to overcome these limitations is to integrate groups of similar species in volumes according to the capacity of the kilns, to be able to apply them the same drying schedule. This study was performed with the goal of integrating groups of tropical wood species that could be dried with the same schedule in order to make feasible the drying process in conventional kilns. For this study, the sawn lumber of 33 tropical species was used, which was integrated in two groups according to their specific gravity, 16 species with specific gravity of 0.30 to 0.60, and 17 with 0.60 to 0.90. A drying schedule was formulated for each group, that was evaluated in a conventional kiln, analyzing the deffects of each board before and after the drying process (checks, twist, cup, bow and crook). In general, the two schedules applied to the two groups of species were adequate since no significant defects due to the drying process were observed. In the group of species with specific gravity below 0.60, 10 of them dried faster than the other 6, which suggest the possibility of subgrouping them to optimize the used of the dry kilns applying them a faster schedule. With the schedule for the species with specific gravity higher than 0.60, 7 of them dried at aproximately half of the time (10 - 14 days) than the other 10, which suggests the possibility of subgrouping them to optimize the use of dry kilns. If it is not possible to regroup the species within each category to achieve a uniform process, it is suggested to integrate the lumber with similar moisture content and dimensions in each one of the two groups analized in this study. |
| format | Online |
| id | oai:oai.myb.ojs.inecol.mx:article-1341 |
| institution | Madera y Bosques |
| language | spa |
| publishDate | 2016 |
| publisher | Instituto de Ecología, A.C. |
| record_format | ojs |
| spelling | oai:oai.myb.ojs.inecol.mx:article-13412022-11-30T01:01:39Z Secado de maderas tropicales en estufas convencionales Secado de maderas tropicales en estufas convencionales Zavala Zavala, David Forest industries tropical species drying schedules Industria forestal especies tropicales secuelas de secado Some of the drying problems of tropical species in conventional kilns are associated with the diversity of their technological properties, with the difficulty of gathering adequate volumes of the same species to apply them a drying schedule according to the wood characteristics, and with the high cost of the process that determines the profitable capacity of the kilns and limits its utilization to dry small volumes of lumber. An alternative to overcome these limitations is to integrate groups of similar species in volumes according to the capacity of the kilns, to be able to apply them the same drying schedule. This study was performed with the goal of integrating groups of tropical wood species that could be dried with the same schedule in order to make feasible the drying process in conventional kilns. For this study, the sawn lumber of 33 tropical species was used, which was integrated in two groups according to their specific gravity, 16 species with specific gravity of 0.30 to 0.60, and 17 with 0.60 to 0.90. A drying schedule was formulated for each group, that was evaluated in a conventional kiln, analyzing the deffects of each board before and after the drying process (checks, twist, cup, bow and crook). In general, the two schedules applied to the two groups of species were adequate since no significant defects due to the drying process were observed. In the group of species with specific gravity below 0.60, 10 of them dried faster than the other 6, which suggest the possibility of subgrouping them to optimize the used of the dry kilns applying them a faster schedule. With the schedule for the species with specific gravity higher than 0.60, 7 of them dried at aproximately half of the time (10 - 14 days) than the other 10, which suggests the possibility of subgrouping them to optimize the use of dry kilns. If it is not possible to regroup the species within each category to achieve a uniform process, it is suggested to integrate the lumber with similar moisture content and dimensions in each one of the two groups analized in this study. Algunos de los problemas en el secado de la madera de especies tropicales en estufas convencionales se deben a la diversidad de sus propiedades tecnológicas, a la dificultad de contar con volúmenes adecuados de una misma especie que permitan adaptar los procesos de secado (secuelas) acordes a las características de sus maderas, y al alto costo del proceso que determina la capacidad rentable de las estufas y limita su utilización para secar volúmenes pequeños. Una alternativa para contrarrestar las limitantes señaladas, es formar grupos de especies semejantes, para integrar volúmenes acordes con las capacidades de las estufas, para aplicarles las mismas secuelas de secado. El presente trabajo se realizó con la finalidad de integrar grupos de especies de maderas tropicales que se pudiesen secar con una misma secuela para hacer más práctico su secado en estufas convencionales. Para este estudio se utilizó la madera aserrada de 33 especies tropicales, que se integraron en dos grupos con base en su densidad básica, 16 especies con densidad básica de 0.30 a 0.60 gr/cm3, y 17 de 0.60 a 0.90 gr/cm3. A cada grupo se le formuló una secuela de secado, que se evaluó en una estufa convencional, analizando los defectos de cada tabla, antes y después del secado (rajaduras, torceduras, acanalamiento, arqueamiento y encorvado). En general, las dos secuelas aplicadas a los dos grupos de especies generaron resultados favorables al no presentarse defectos significativos debidos al proceso de secado. En el grupo de especies de densidad básica menor de 0.60 gr/cm3, 10 se secaron más rápido que las otras 6, por lo que se podrían subagrupar para optimizar las estufas de secado aplicándoles otra secuela más rápida. Con la secuela utilizada para las especies con densidad básica mayor de 0.60 gr/cm3, 7 de ellas se secaron en aproximadamente la mitad del tiempo (10-14días) en relación a las otras 10, siendo posible subagruparlas también para optimizar las estufas. De no ser factible reagrupar a las especies dentro de cada categoría, se sugiere que para lograr un proceso lo más uniforme posible, coincidan los contenidos de humedad y las dimensiones de la madera en cada uno de los dos grupos de especies analizados en este trabajo. Instituto de Ecología, A.C. 2016-09-05 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Artículo evaluado por pares application/pdf https://myb.ojs.inecol.mx/index.php/myb/article/view/1341 10.21829/myb.2000.611341 Madera y Bosques; Vol. 6 No. 1 (2000): Primavera 2000; 41-54 Madera y Bosques; Vol. 6 Núm. 1 (2000): Primavera 2000; 41-54 2448-7597 1405-0471 spa https://myb.ojs.inecol.mx/index.php/myb/article/view/1341/1509 Derechos de autor 2016 Madera y Bosques |
| spellingShingle | Zavala Zavala, David Secado de maderas tropicales en estufas convencionales |
| title | Secado de maderas tropicales en estufas convencionales |
| title_full | Secado de maderas tropicales en estufas convencionales |
| title_fullStr | Secado de maderas tropicales en estufas convencionales |
| title_full_unstemmed | Secado de maderas tropicales en estufas convencionales |
| title_short | Secado de maderas tropicales en estufas convencionales |
| title_sort | secado de maderas tropicales en estufas convencionales |
| url | https://myb.ojs.inecol.mx/index.php/myb/article/view/1341 |
| work_keys_str_mv | AT zavalazavaladavid secadodemaderastropicalesenestufasconvencionales |
