CN105403001A - Wood drying method - Google Patents
Wood drying method Download PDFInfo
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- CN105403001A CN105403001A CN201510800116.8A CN201510800116A CN105403001A CN 105403001 A CN105403001 A CN 105403001A CN 201510800116 A CN201510800116 A CN 201510800116A CN 105403001 A CN105403001 A CN 105403001A
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Abstract
The invention discloses a wood drying method, and relates to the technical field of wood processing. The method comprises the following steps of stacking, preheating, vacuumizing, drying, final processing, temperature reduction, and cooling. By means of the drying method, the moisture content of wood is controlled within 8-11%, the moisture content homogeneity of the wood is good, and the wood drying period is shortened; the wood is good in quality, has only a few defects and is low in loss ratio after being dried, and the multipurpose utilization rate of the wood is improved. The wood drying method is suitable for the production of furniture and other wood products, and the probability of quality problems of deforming, cracking and the like arisen in the product manufacturing process is reduced, so that the production quality of the wood furniture is improved.
Description
Technical field
The present invention relates to wood working process technical field, be specifically related to a kind of method for drying wood.
Background technology
Along with the progress of society, people's uphold nature, the mood gone back to nature is day by day urgent, and wood-based product is commercially extremely liked; On the other hand, the world today is faced with the forest reserves and day by day reduces brought environmental protection and ecological problem.Therefore, limited timber resources how is utilized to seem even more important rationally and effectively.According to the current resource situation of China, from now within the quite a long time, the raw material of China's forest product industry product development is by based on the fast-growing small dimension wood of 5 ~ 10 years raw short circulation phases.Small dimension wood is through reasonably dry and processing, both the supportive furniture such as chair, stool, bed, sofa can be directly made into, can give full play to again, ingenious some characteristic utilizing small dimension wood, as flexibility, taperingness, geometric cross section etc. directly revolve the parts making solid wood furniture.
The drying of wood is the very important operation of in timber process, is the important step ensureing and improve wood quality.Processed by drying, the strain cracking of timber can be prevented, reduce dockage loss, improve physical property, improve timber utilization rate, prevent foxiness from damaging by worms, ensure biological epidemic-prevention etc.And the extensive use of undersized log is seriously limited at present owing to there is no the efficient drying means for undersized log.Mostly the known drying method for Logs of small diameter is to be undertaken by con-ventional drying equipment and technique, its subject matter brought is that the arid cycle of not only Logs of small diameter is long, and seasoning defect drying defect is serious, as easily produced gross distortion and cross shake in dry run, particularly for firmly mixing, Logs of small diameter drying is difficult, yield rate is low, and the dry mass of Logs of small diameter directly affects the dimensional stability of the product processed by undersized log.
Summary of the invention
For the deficiencies in the prior art, the invention provides the method for drying wood relatively shortened a kind of drying time, the quality better of dried timber, defect is few, improves timber resources utilization rate.
For realizing above object, the present invention is achieved by the following technical programs:
A kind of method for drying wood, comprises the following steps:
1), piling: timber is sawn into plank or flitch, selects the stacking of same size specification good, and be positioned over drying of wood indoor;
2), preheating: be warming up to 45-55 with the ambient temperature of programming rate to drying of wood indoor of 4-5 per hour DEG C, regulating environmental humidity is to 18-20% simultaneously, keeps certain hour;
3), vacuum: vacuumize, absolute pressure controlled at 0.1-0.01Mpa, temperature is more than or equal to 85 DEG C, and the time is 0.5h-1h;
4), dry: with the programming rate of 3-4 per hour DEG C, to carry out staged heating at 85-150 DEG C of interval the other side's buttress;
5), end process: monitoring is when desiccated wood moisture content drops to from whole moisture content 2%, stop dry, recover normal pressure, regulate environment temperature and the ambient humidity of timber volume drying indoor, environment temperature is made to rise to 60 DEG C, ambient humidity rises to 10%, and keeps this environment temperature and environmental damp condition;
6), cooling process: after the process that ends, regulate the environment temperature of timber volume drying indoor, make environment temperature be down to 50 DEG C, ambient humidity remains 10%, and keeps this environment temperature and environmental damp condition;
7), cool: monitor when moisture content meets the requirements of whole moisture content, end step 6), shift out in drying of wood process chamber after making timber naturally cool to common room temperature.
Preferably, described step 1) be in the plank or flitch of same seeds, select same dimension specification plank or flitch.
Preferably, described step 2) the middle retention time (h) is 1 ~ 2h:1cm with the ratio of plank diameter (cm), but the retention time is no more than 50h.
Preferably, described step 5) in whole moisture content be 8%.
Preferably, described step 5) in end process the retention time be 12-15h.
Beneficial effect: the invention provides a kind of method for drying wood, adopt drying means of the present invention, make the moisture control of sheet material at 8-11%, the whole moisture content difference of timber of same batch processing is in 3% scope, moisture content uniformity is good, and drying of wood cycle time, the quality better of dried timber, avoid the generation of the defects such as wood shrinkage cracking to a great extent, improve wood comprehensive utilization rate.The present invention is applicable to the production of the Wood products such as furniture, reduces the probability occurring the quality problems such as strain cracking in production, to improve the product quality of wood furniture.
Detailed description of the invention
For making the object of the embodiment of the present invention, technical scheme and advantage clearly, below in conjunction with the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Embodiment 1:
Fast growth poplar, national suitable cultivation, suitable especially NORTHWEST CHINA, North China and Northeast China region plantation.The drying means of fast growth poplar in hothouse of diameter 20cm comprises the following steps:
1), piling: timber is sawn into plank or flitch, selects the stacking of same size specification good, and be positioned over drying of wood indoor;
2), preheating: be warming up to 45-55 with the ambient temperature of programming rate to drying of wood indoor of 4-5 per hour DEG C, regulating environmental humidity is to 18-20% simultaneously, keeps 20-40h;
3), vacuum: vacuumize, absolute pressure controlled at 0.1-0.01Mpa, temperature is more than or equal to 85 DEG C, and the time is 0.5h-1h;
4), dry: with the programming rate of 3-4 per hour DEG C, to carry out staged heating at 85-150 DEG C of interval the other side's buttress;
5), end process: monitoring is when desiccated wood moisture content drops to 10%, stop dry, recover normal pressure, regulate environment temperature and the ambient humidity of timber volume drying indoor, environment temperature is made to rise to 60 DEG C, ambient humidity rises to 10%, and keeps this environment temperature and environmental damp condition 12-15h;
6), cooling process: after the process that ends, regulate the environment temperature of timber volume drying indoor, make environment temperature be down to 50 DEG C, ambient humidity remains 10%, and keeps this environment temperature and environmental damp condition;
7), cool: monitor when moisture content meets the requirements of whole moisture content, end step 6), shift out in drying of wood process chamber after making timber naturally cool to common room temperature.
Embodiment 2:
Eucalyptus, original producton location, mainly in continent, Australia, was introduced a fine variety to all over the world in 19th century, and there is cultivation existing more or less a hundred country, and the drying means of eucalyptus in hothouse of diameter 20cm comprises the following steps:
1), piling: timber is sawn into plank or flitch, selects the stacking of same size specification good, and be positioned over drying of wood indoor;
2), preheating: be warming up to 45-55 with the ambient temperature of programming rate to drying of wood indoor of 4-5 per hour DEG C, regulating environmental humidity is to 18-20% simultaneously, keeps 20-40h;
3), vacuum: vacuumize, absolute pressure controlled at 0.1-0.01Mpa, temperature is more than or equal to 85 DEG C, and the time is 0.5h-1h;
4), dry: with the programming rate of 3-4 per hour DEG C, to carry out staged heating at 85-150 DEG C of interval the other side's buttress;
5), end process: monitoring is when desiccated wood moisture content drops to 10%, stop dry, recover normal pressure, regulate environment temperature and the ambient humidity of timber volume drying indoor, environment temperature is made to rise to 60 DEG C, ambient humidity rises to 10%, and keeps this environment temperature and environmental damp condition 12-15h;
6), cooling process: after the process that ends, regulate the environment temperature of timber volume drying indoor, make environment temperature be down to 50 DEG C, ambient humidity remains 10%, and keeps this environment temperature and environmental damp condition;
7), cool: monitor when moisture content meets the requirements of whole moisture content, end step 6), shift out in drying of wood process chamber after making timber naturally cool to common room temperature.
Embodiment 3:
Silver birch, that of east Asia blazons seeds, there is plantation on the ground such as North China, China northeast, Henan, Shaanxi, Ningxia, Gansu, Qinghai, Sichuan, Yunnan, Southeastern Tibet, and the drying means of silver birch in hothouse of diameter 15cm comprises the following steps:
1), piling: timber is sawn into plank or flitch, selects the stacking of same size specification good, and be positioned over drying of wood indoor;
2), preheating: be warming up to 45-55 with the ambient temperature of programming rate to drying of wood indoor of 4-5 per hour DEG C, regulating environmental humidity is to 18-20% simultaneously, keeps 15-30h;
3), vacuum: vacuumize, absolute pressure controlled at 0.1-0.01Mpa, temperature is more than or equal to 85 DEG C, and the time is 0.5h-1h;
4), dry: with the programming rate of 3-4 per hour DEG C, to carry out staged heating at 85-150 DEG C of interval the other side's buttress;
5), end process: monitoring is when desiccated wood moisture content drops to 10%, stop dry, recover normal pressure, regulate environment temperature and the ambient humidity of timber volume drying indoor, environment temperature is made to rise to 60 DEG C, ambient humidity rises to 10%, and keeps this environment temperature and environmental damp condition 12-15h;
6), cooling process: after the process that ends, regulate the environment temperature of timber volume drying indoor, make environment temperature be down to 50 DEG C, ambient humidity remains 10%, and keeps this environment temperature and environmental damp condition;
7), cool: monitor when moisture content meets the requirements of whole moisture content, end step 6), shift out in drying of wood process chamber after making timber naturally cool to common room temperature.
To sum up, in the embodiment of the present invention seldom there is drying shrinkage in timber in dry run, wrinkle is collapsed, the phenomenon such as cracking, and loss late is low, the dried moisture control of sheet material is at 8-11%, drying of wood cycle time, the quality better of dried timber, improves wood comprehensive utilization rate.The present invention is applicable to the production of the Wood products such as furniture, improves the product quality of wood furniture.
It should be noted that, in this article, the such as relational terms of first and second grades and so on is only used for an entity or operation to separate with another entity or operating space, and not necessarily requires or imply the relation that there is any this reality between these entities or operation or sequentially.And, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thus make to comprise the process of a series of key element, method, article or equipment and not only comprise those key elements, but also comprise other key elements clearly do not listed, or also comprise by the intrinsic key element of this process, method, article or equipment.When not more restrictions, the key element limited by statement " comprising ... ", and be not precluded within process, method, article or the equipment comprising described key element and also there is other identical element.
Above embodiment only in order to technical scheme of the present invention to be described, is not intended to limit; Although with reference to previous embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (5)
1. a method for drying wood, is characterized in that, said method comprising the steps of:
1), piling: timber is sawn into plank or flitch, selects the stacking of same size specification good, and be positioned over drying of wood indoor;
2), preheating: be warming up to 45-55 with the ambient temperature of programming rate to drying of wood indoor of 4-5 per hour DEG C, regulating environmental humidity is to 18-20% simultaneously, keeps certain hour;
3), vacuum: vacuumize, absolute pressure controlled at 0.1-0.01Mpa, temperature is more than or equal to 85 DEG C, and the time is 0.5h-1h;
4), dry: with the programming rate of 3-4 per hour DEG C, to carry out staged heating at 85-150 DEG C of interval the other side's buttress;
5), end process: monitoring is when desiccated wood moisture content drops to from whole moisture content 2%, stop dry, recover normal pressure, regulate environment temperature and the ambient humidity of timber volume drying indoor, environment temperature is made to rise to 60 DEG C, ambient humidity rises to 10%, and keeps this environment temperature and environmental damp condition;
6), cooling process: after the process that ends, regulate the environment temperature of timber volume drying indoor, make environment temperature be down to 50 DEG C, ambient humidity remains 10%, and keeps this environment temperature and environmental damp condition;
7), cool: monitor when moisture content meets the requirements of whole moisture content, end step 6), shift out in drying of wood process chamber after making timber naturally cool to common room temperature.
2. method for drying wood as claimed in claim 1, is characterized in that, described step 1) be in the plank or flitch of same seeds, select same dimension specification plank or flitch.
3. method for drying wood as claimed in claim 1, is characterized in that, described step 2) the middle retention time (h) is 1 ~ 2h:1cm with the ratio of plank diameter (cm), but the retention time is no more than 50h.
4. method for drying wood as claimed in claim 1, is characterized in that, described step 5) in whole moisture content be 8%.
5. method for drying wood as claimed in claim 1, is characterized in that, described step 5) in process retention time of ending be 12-15h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510800116.8A CN105403001B (en) | 2015-11-18 | 2015-11-18 | A kind of method for drying wood |
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| CN201510800116.8A CN105403001B (en) | 2015-11-18 | 2015-11-18 | A kind of method for drying wood |
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| CN105403001A true CN105403001A (en) | 2016-03-16 |
| CN105403001B CN105403001B (en) | 2018-07-31 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106369938A (en) * | 2016-11-07 | 2017-02-01 | 广西南宁侨盛木业有限责任公司 | Drying method for fast-growing eucalyptus sawn timber |
| CN106643012A (en) * | 2016-12-30 | 2017-05-10 | 德清华梦木制品有限公司 | Special drying method for small-diameter timbers |
| CN107036394A (en) * | 2017-05-04 | 2017-08-11 | 四川农业大学 | A kind of vacuum drying method of nanmu sheet material |
| CN109434998A (en) * | 2018-11-13 | 2019-03-08 | 梅州市汇胜木制品有限公司 | A kind of drying of wood and Low Temperature Heat Treatment integral process |
| CN110906692A (en) * | 2019-10-23 | 2020-03-24 | 河南晖睿智能科技有限公司 | Novel wood drying pretreatment method |
| CN111283840A (en) * | 2020-02-14 | 2020-06-16 | 南京林业大学 | Method for reducing chromatic aberration in wood board drying process |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109341198A (en) * | 2018-10-17 | 2019-02-15 | 李韵婷 | Method for drying wood |
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Patent Citations (6)
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| US5687490A (en) * | 1996-08-01 | 1997-11-18 | Harrison; Jack B. | Method of drying lumber |
| CN2436899Y (en) * | 2000-08-21 | 2001-06-27 | 边新虎 | Timber vacuum dry box |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106369938A (en) * | 2016-11-07 | 2017-02-01 | 广西南宁侨盛木业有限责任公司 | Drying method for fast-growing eucalyptus sawn timber |
| CN106643012A (en) * | 2016-12-30 | 2017-05-10 | 德清华梦木制品有限公司 | Special drying method for small-diameter timbers |
| CN107036394A (en) * | 2017-05-04 | 2017-08-11 | 四川农业大学 | A kind of vacuum drying method of nanmu sheet material |
| CN109434998A (en) * | 2018-11-13 | 2019-03-08 | 梅州市汇胜木制品有限公司 | A kind of drying of wood and Low Temperature Heat Treatment integral process |
| CN109434998B (en) * | 2018-11-13 | 2021-06-15 | 梅州市汇胜木制品有限公司 | Wood drying and low-temperature heat treatment integrated process |
| CN110906692A (en) * | 2019-10-23 | 2020-03-24 | 河南晖睿智能科技有限公司 | Novel wood drying pretreatment method |
| CN111283840A (en) * | 2020-02-14 | 2020-06-16 | 南京林业大学 | Method for reducing chromatic aberration in wood board drying process |
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| CN105403001B (en) | 2018-07-31 |
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Inventor after: Tong Daxi Inventor after: Tong Xiaoman Inventor after: Zhu Huayun Inventor before: Wang Shizhou Inventor before: Wang Haoran |
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Effective date of registration: 20180117 Address after: Tai Xiang Tong Lou Cun 236300 Anhui city of Fuyang province Funan County Gao Applicant after: Funan county big willow crafts Co. Ltd. Address before: 242216 Xuancheng, Xuancheng, Anhui Province, Guangde County, Geng Village Applicant before: GUANGDE CHANGFENG BAMBOO INDUSTRY PRODUCT CO., LTD. |
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