CN109341198A - Method for drying wood - Google Patents
Method for drying wood Download PDFInfo
- Publication number
- CN109341198A CN109341198A CN201811209687.4A CN201811209687A CN109341198A CN 109341198 A CN109341198 A CN 109341198A CN 201811209687 A CN201811209687 A CN 201811209687A CN 109341198 A CN109341198 A CN 109341198A
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- China
- Prior art keywords
- temperature
- timber
- drying
- hothouse
- keeps
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B1/00—Preliminary treatment of solid materials or objects to facilitate drying, e.g. mixing or backmixing the materials to be dried with predominantly dry solids
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B1/00—Preliminary treatment of solid materials or objects to facilitate drying, e.g. mixing or backmixing the materials to be dried with predominantly dry solids
- F26B1/005—Preliminary treatment of solid materials or objects to facilitate drying, e.g. mixing or backmixing the materials to be dried with predominantly dry solids by means of disintegrating, e.g. crushing, shredding, milling the materials to be dried
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B3/00—Drying solid materials or objects by processes involving the application of heat
- F26B3/32—Drying solid materials or objects by processes involving the application of heat by development of heat within the materials or objects to be dried, e.g. by fermentation or other microbiological action
- F26B3/34—Drying solid materials or objects by processes involving the application of heat by development of heat within the materials or objects to be dried, e.g. by fermentation or other microbiological action by using electrical effects
- F26B3/343—Drying solid materials or objects by processes involving the application of heat by development of heat within the materials or objects to be dried, e.g. by fermentation or other microbiological action by using electrical effects in combination with convection
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B2210/00—Drying processes and machines for solid objects characterised by the specific requirements of the drying good
- F26B2210/16—Wood, e.g. lumber, timber
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Microbiology (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Biotechnology (AREA)
- Molecular Biology (AREA)
- Chemical And Physical Treatments For Wood And The Like (AREA)
- Drying Of Solid Materials (AREA)
Abstract
The present invention relates to a kind of method for drying wood, which is characterized in that step includes: 1) to pre-process；2) timber is subjected to stacking natural drying；3) stack of lumber is moved into hothouse；4) hothouse is warming up to 50~55 DEG C, keeps the temperature 1~1.5h；5) hothouse is warming up to 60~70 DEG C, keeps the temperature 50~60min；6) hothouse is warming up to 80~85 DEG C, keeps the temperature 1~2h；7) stack of lumber is subjected to ultrasonic wave drying；8) timber of the ultrasound after dry is put into hot press and is dried；9) after hot-pressing drying, timber is subjected to high temperature and high pressure steam processing；10) air inlet for opening hothouse, keeps ventilation, so that the dry indoor slow natural cooling of temperature；11) when the temperature of timber sandwich layer is higher than outdoor temperature and is no more than 20~25 DEG C, the indoor timber of drying is taken out.Method for drying wood provided by the invention, so that timber crack rate is low；The nutriment that wood internal microorganism and pest depend on for existence simultaneously is removed, and is conducive to timber and is saved for a long time.
Description
Technical field
The present invention relates to wood working process technical field, especially a kind of method for drying wood.
Background technique
Timber is one of most important raw material in human production life, can be used to be fabricated to various lives and production is used
Product, but cannot directly be processed after log felling, needing the moisture content of timber to be reduced to certain value could use, general furniture
In production, ideal moisture content is 7-8%, and stress and residual stress should be lower than 2.5%, particular for high-grade solid wood man
For tool production, stress and residual stress should be lower than 1.5%, and the moisture content difference of separated layer water cut internal layer and outer layer is less than 1%.But
Be in fact, most of the timber bought be it is underproof, checked from statistical data, the moisture content of the so-called kiln dried wood of outsourcing
It is substantially all more than 10%, highest or even can arrive 20%-25%, porous media is also uneven, and stress maximum value is very
To reaching 10% or more, Surface hardened layer degree is big, far can not reach actual requirement, so this kind of " dry " timber needs to do again
It is dry.But the conventional drying processes time is longer, and energy consumption is high, stress elimination ability is poor, be much unable to satisfy lumber quality,
Manufacturing schedule and energy-efficient requirement, therefore how to design one kind and can be effectively reduced moisture content, and greatly shorten timber
The technique of dry time and the timber high temperature drying processing with anti-mildew ability, the technology for becoming this field urgent need to resolve are asked
Topic.
Summary of the invention
The object of the present invention is to provide a kind of method for drying wood, solve the existing method for drying wood time is long, energy consumption is high,
The problems such as moisture content is high.
To achieve the goals above, the invention discloses a kind of method for drying wood, step includes:
1) timber is subjected to cutting process by processing request, then the impurity such as sawdust is rinsed with clear water；
2) timber is subjected to stacking natural drying, the moisture control of timber is 28~32%；
3) stack of lumber is moved into hothouse, the hothouse is warming up to 30~45 DEG C, keeps the temperature 20~30min；
4) hothouse is warming up to 50~55 DEG C, keeps the temperature 1~1.5h；
5) hothouse is warming up to 60~70 DEG C, keeps the temperature 50~60min；
6) hothouse is warming up to 80~85 DEG C, keeps the temperature 1~2h；
7) stack of lumber is subjected to ultrasonic wave drying, ultrasonic frequency is 60~70KHz, and temperature is 70~80 DEG C；
8) timber of the ultrasound after dry is put into hot press and is dried, hot pressing temperature is 150~180 DEG C, hot pressing pressure
Power is 2.0~3.0MPa；
9) after hot-pressing drying, timber is subjected to high temperature and high pressure steam processing, vapor (steam) temperature is 180~200 DEG C, the time
For 3~5h；
10) air inlet for opening hothouse, keeps ventilation, so that the dry indoor slow natural cooling of temperature；
11) when the temperature of timber sandwich layer is higher than outdoor temperature and is no more than 20~25 DEG C, the indoor timber of drying is taken out.
Preferred embodiment is: the moisture content of timber is 0.5~1% in step 11.
Preferred embodiment is: the height of timber stacking is 1~3m, and width is 1~2.5m.
Preferred embodiment is: the frequency of ultrasound is 60KHz when ultrasonic wave is dry, and temperature is 70 DEG C.
Preferred embodiment is: timber being carried out stacking natural drying, the moisture control of timber is 28%.
Preferred embodiment is: being dried in hot press, hot pressing temperature is 150 DEG C, hot pressing pressure 2.0MPa.
Preferred embodiment is: stack of lumber being moved to hothouse, the hothouse is warming up to 30 DEG C, keeps the temperature 20min.
The method of the invention can effectively reduce the moisture content of timber, and greatly shorten the time of the drying of wood, and
And fungi and pest most in timber can be killed in high-temperature process, change the interior molecules combination of timber, makes wood
The moisture absorption ability of material reduces, and physical property significantly improves；Staged heating mode, so that timber crack rate is low；Simultaneously in timber
The nutriment that portion microorganism and pest depend on for existence is removed, and is conducive to timber and is saved for a long time.
Specific embodiment
The present invention is described in further detail combined with specific embodiments below:
Embodiment 1
A kind of method for drying wood is present embodiments provided, step includes:
1) timber is subjected to cutting process by processing request, then the impurity such as sawdust is rinsed with clear water；
2) timber is subjected to stacking natural drying, the moisture control of timber is 28%, and the height of timber stacking is 1m, wide
Degree is 1m；
3) stack of lumber is moved into hothouse, the hothouse is warming up to 30 DEG C, keeps the temperature 20min；
4) hothouse is warming up to 50 DEG C, keeps the temperature 1h；
5) hothouse is warming up to 60 DEG C, keeps the temperature 50min；
6) hothouse is warming up to 80 DEG C, keeps the temperature 1h；
7) stack of lumber is subjected to ultrasonic wave drying, ultrasonic frequency is 60KHz, and temperature is 70 DEG C；
8) timber of the ultrasound after dry is put into hot press and is dried, hot pressing temperature is 150 DEG C, and hot pressing pressure is
2.0MPa；
9) after hot-pressing drying, timber is subjected to high temperature and high pressure steam processing, vapor (steam) temperature is 180 DEG C, time 3h；
10) air inlet for opening hothouse, keeps ventilation, so that the dry indoor slow natural cooling of temperature；
11) when the temperature of timber sandwich layer is higher than outdoor temperature and is no more than 20 DEG C, the indoor timber of drying is taken out, it is aqueous
Rate is 0.5%.
Embodiment 2
A kind of method for drying wood is present embodiments provided, step includes:
1) timber is subjected to cutting process by processing request, then the impurity such as sawdust is rinsed with clear water；
2) timber is subjected to stacking natural drying, the moisture control of timber is 32%, and the height of timber stacking is 3m, wide
Degree is 2.5m；
3) stack of lumber is moved into hothouse, the hothouse is warming up to 45 DEG C, keeps the temperature 30min；
4) hothouse is warming up to 55 DEG C, keeps the temperature 1.5h；
5) hothouse is warming up to 70 DEG C, keeps the temperature 60min；
6) hothouse is warming up to 85 DEG C, keeps the temperature 2h；
7) stack of lumber is subjected to ultrasonic wave drying, ultrasonic frequency is 70KHz, and temperature is 80 DEG C；
8) timber of the ultrasound after dry is put into hot press and is dried, hot pressing temperature is 180 DEG C, and hot pressing pressure is
3.0MPa；
9) after hot-pressing drying, timber is subjected to high temperature and high pressure steam processing, vapor (steam) temperature is 200 DEG C, time 5h；
10) air inlet for opening hothouse, keeps ventilation, so that the dry indoor slow natural cooling of temperature；
11) when the temperature of timber sandwich layer is higher than outdoor temperature and is no more than 25 DEG C, the indoor timber of drying is taken out, it is aqueous
Rate is 1%.
Embodiment 3
A kind of method for drying wood is present embodiments provided, step includes:
1) timber is subjected to cutting process by processing request, then the impurity such as sawdust is rinsed with clear water；
2) timber is subjected to stacking natural drying, the moisture control of timber is 30%, and the height of timber stacking is 2m, wide
Degree is 2m；
3) stack of lumber is moved into hothouse, the hothouse is warming up to 35 DEG C, keeps the temperature 25min；
4) hothouse is warming up to 52 DEG C, keeps the temperature 1.3h；
5) hothouse is warming up to 65 DEG C, keeps the temperature 55min；
6) hothouse is warming up to 82 DEG C, keeps the temperature 1.5h；
7) stack of lumber is subjected to ultrasonic wave drying, ultrasonic frequency is 65KHz, and temperature is 75 DEG C；
8) timber of the ultrasound after dry is put into hot press and is dried, hot pressing temperature is 160 DEG C, and hot pressing pressure is
2.5MPa；
9) after hot-pressing drying, timber is subjected to high temperature and high pressure steam processing, vapor (steam) temperature is 190 DEG C, time 4h；
10) air inlet for opening hothouse, keeps ventilation, so that the dry indoor slow natural cooling of temperature；
11) when the temperature of timber sandwich layer is higher than outdoor temperature and is no more than 22 DEG C, the indoor timber of drying is taken out, it is aqueous
Rate is 0.7%.
Comparative example
1, a kind of hot-pressing drying method of cryptomeria timber, it is characterized in that successively the following steps are included:
(1) cryptomeria greenwood plate the moisture content adjustment of cryptomeria timber: is subjected to stacking natural drying, moisture content control
In 25~30% ranges；
(2) the cryptomeria timber adjusted in step (1) is put into hot press and is dried, hot pressing temperature is 160 DEG C, heat
Pressure unit pressure is 2MPa；
(3) in hot pressing, after the every closure heating 0.5h of pressing plate, pressure release makes heating platen open 15min, accelerates wood surface
Moisture is mobile；Stop heating when moisture content reaches 8~15%；
(4) it post-processes: after hot-pressing drying, dried timber being placed in 180 DEG C of high temperature and high pressure steams and is handled
10h。
Experiment effect data
Although the embodiments of the present invention have been disclosed as above, but its is not only in the description and the implementation listed
With it can be fully applied to various fields suitable for the present invention, for those skilled in the art, can be easily
Realize other modification, therefore without departing from the general concept defined in the claims and the equivalent scope, the present invention is simultaneously unlimited
In specific details and embodiment shown and described herein.
Claims (7)
1. method for drying wood, which is characterized in that step includes:
1) timber is subjected to cutting process by processing request, then the impurity such as sawdust is rinsed with clear water；
2) timber is subjected to stacking natural drying, the moisture control of timber is 28~32%；
3) stack of lumber is moved into hothouse, the hothouse is warming up to 30~45 DEG C, keeps the temperature 20~30min；
4) hothouse is warming up to 50~55 DEG C, keeps the temperature 1~1.5h；
5) hothouse is warming up to 60~70 DEG C, keeps the temperature 50~60min；
6) hothouse is warming up to 80~85 DEG C, keeps the temperature 1~2h；
7) stack of lumber is subjected to ultrasonic wave drying, ultrasonic frequency is 60~70KHz, and temperature is 70~80 DEG C；
8) timber of the ultrasound after dry is put into hot press and is dried, hot pressing temperature is 150~180 DEG C, and hot pressing pressure is
2.0~3.0MPa；
9) after hot-pressing drying, timber is subjected to high temperature and high pressure steam processing, vapor (steam) temperature is 180~200 DEG C, the time 3
~5h；
10) air inlet for opening hothouse, keeps ventilation, so that the dry indoor slow natural cooling of temperature；
11) when the temperature of timber sandwich layer is higher than outdoor temperature and is no more than 20~25 DEG C, the indoor timber of drying is taken out.
2. method for drying wood according to claim 1, which is characterized in that in step 11 moisture content of timber be 0.5~
1%.
3. method for drying wood according to claim 1, which is characterized in that the height of timber stacking is 1~3m, and width is
1~2.5m.
4. method for drying wood according to claim 1, which is characterized in that the frequency of ultrasound is when ultrasonic wave is dry
60KHz, temperature are 70 DEG C.
5. method for drying wood according to claim 1, which is characterized in that timber is carried out stacking natural drying, timber
Moisture control be 28%.
6. method for drying wood according to claim 1, which is characterized in that be dried in hot press, hot pressing temperature is
150 DEG C, hot pressing pressure 2.0MPa.
7. method for drying wood according to claim 1, which is characterized in that stack of lumber is moved into hothouse, it will be described dry
Dry room is warming up to 30 DEG C, keeps the temperature 20min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811209687.4A CN109341198A (en) | 2018-10-17 | 2018-10-17 | Method for drying wood |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811209687.4A CN109341198A (en) | 2018-10-17 | 2018-10-17 | Method for drying wood |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109341198A true CN109341198A (en) | 2019-02-15 |
Family
ID=65308945
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811209687.4A Pending CN109341198A (en) | 2018-10-17 | 2018-10-17 | Method for drying wood |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109341198A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110617673A (en) * | 2019-10-09 | 2019-12-27 | 南平市华泰木竹有限公司 | Efficient and energy-saving veneer drying process method |
| CN112378170A (en) * | 2020-10-27 | 2021-02-19 | 北京林业大学 | Small-diameter wood solid wood utilization method |
| CN114184001A (en) * | 2021-11-26 | 2022-03-15 | 中南林业科技大学 | Wood drying method |
| CN114311201A (en) * | 2021-12-30 | 2022-04-12 | 东莞市新崚晟机械有限公司 | High-frequency hot-pressing drying method for wood |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103115481A (en) * | 2012-03-30 | 2013-05-22 | 北京林业大学 | Lumber drying equipment and method of drying lumber by using equipment |
| CN104290159A (en) * | 2014-10-23 | 2015-01-21 | 久盛地板有限公司 | Deinsectization method for base material of solid wood floor |
| CN107763977A (en) * | 2017-10-25 | 2018-03-06 | 融水县鼎丰竹木制品有限公司 | A kind of China fir drying means |
| CN105403001B (en) * | 2015-11-18 | 2018-07-31 | 阜南县大喜柳编工艺品有限公司 | A kind of method for drying wood |
| CN108344257A (en) * | 2018-01-18 | 2018-07-31 | 四川农业大学 | A kind of hot-pressing drying method of cryptomeria timber |
-
2018
- 2018-10-17 CN CN201811209687.4A patent/CN109341198A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103115481A (en) * | 2012-03-30 | 2013-05-22 | 北京林业大学 | Lumber drying equipment and method of drying lumber by using equipment |
| CN104290159A (en) * | 2014-10-23 | 2015-01-21 | 久盛地板有限公司 | Deinsectization method for base material of solid wood floor |
| CN105403001B (en) * | 2015-11-18 | 2018-07-31 | 阜南县大喜柳编工艺品有限公司 | A kind of method for drying wood |
| CN107763977A (en) * | 2017-10-25 | 2018-03-06 | 融水县鼎丰竹木制品有限公司 | A kind of China fir drying means |
| CN108344257A (en) * | 2018-01-18 | 2018-07-31 | 四川农业大学 | A kind of hot-pressing drying method of cryptomeria timber |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110617673A (en) * | 2019-10-09 | 2019-12-27 | 南平市华泰木竹有限公司 | Efficient and energy-saving veneer drying process method |
| CN112378170A (en) * | 2020-10-27 | 2021-02-19 | 北京林业大学 | Small-diameter wood solid wood utilization method |
| CN114184001A (en) * | 2021-11-26 | 2022-03-15 | 中南林业科技大学 | Wood drying method |
| CN114311201A (en) * | 2021-12-30 | 2022-04-12 | 东莞市新崚晟机械有限公司 | High-frequency hot-pressing drying method for wood |
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Application publication date: 20190215 |
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