CN102538408A - Vacuum drying method for processing wood plate raw materials - Google Patents
Vacuum drying method for processing wood plate raw materials Download PDFInfo
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- CN102538408A CN102538408A CN2012100063853A CN201210006385A CN102538408A CN 102538408 A CN102538408 A CN 102538408A CN 2012100063853 A CN2012100063853 A CN 2012100063853A CN 201210006385 A CN201210006385 A CN 201210006385A CN 102538408 A CN102538408 A CN 102538408A
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Abstract
The invention discloses a vacuum drying method for processing wood plate raw materials, which belongs to a drying method for wood plate raw materials. Drying process includes a step A, placing the wood plate raw materials into a drying tank, sealing an opening of the drying tank, and forming a vacuum environment in the drying tank by the aid of vacuumizing equipment; and a step B, heating the drying tank from the outside of the drying tank at the temperature ranging from 30 Celsius degrees to 165 Celsius degrees for 72 hours to 360 hours, and obtaining a dried wood plate raw material finished product. By means of drying in a vacuum condition, temperature required for evaporating moisture is lowered, accordingly, the wood plate raw material is dried at relatively low temperature, loss of the raw materials due to over high temperature is avoided, and the drying tank placed transversely is favorable for being heated from the outside thereof. In addition, the steps of the vacuum drying method for processing the wood plate raw materials are simple, and the method is suitable for drying various wood materials, is particularly suitable for drying wood of fast-growing forests, and is wide in application range.
Description
Technical field
The present invention relates to a kind of drying means of wood plank raw material, a kind of vacuum drying method of processing the wood plank raw material of saying so more specifically.
Background technology
Continuous maturation along with plate fitment market; Increasing large-scale furniture manufacturer even forest material R&D institution begin to focus on wooden boards Research on Process and innovation, and the processing technology of existing wooden boards is put together for the thin plate that dried raw material is cut into the multilayer different-thickness, because the raw material of wooden boards mostly is a fast-growing woods timber at present; Water content is higher; Need be with just being used to process wooden boards behind its bone dry, and the drying process of existing wooden boards raw material mainly is divided into three kinds, first kind is raw material directly to be placed treat its air dry under the normal temperature; But the drying principles of this kind drying mode is comparatively simple; Rate of drying is slow, is prone to make fast-growing woods wood modification cracking, also be bullied the easily influence of gentle place to place surrounding environment of drying effect; Second kind is that wooden boards raw material (promptly whole fast-growing woods wood) is placed under the environment of vacuum; Mode through in vacuum environment, heating is carried out bake drying, more aforesaid a kind of the comparing of this kind drying process, and rate of drying is very fast; But under the effect of fast-growing woods wood internal stress; Make wood plank raw material cracking easily, make and finished product wood plank generation crackle in post-production reduce product quality; The third is after the fast-growing woods wood as the wood plank raw material is processed into thicker wooden unit; Carry out drying according to aforementioned second kind mode again; This kind mode can be improved the cracking situation in aforementioned second kind of drying mode; But dry wooden unit still can receive the influence of its internal stress that the thickness of itself is changed in dry run, causes dried wooden unit wherein partly can not use; Reduced the wood plank utilization ratio of raw materials, therefore be necessary to do further improvement to the drying process of wood plank raw material.
Summary of the invention
One of the object of the invention is to solve above-mentioned deficiency, provides drying efficiency high, and can improve a kind of vacuum drying method of processing the wood plank raw material of wood plank raw material availability.
For solving above-mentioned technical problem, the present invention adopts following technical scheme:
A kind of vacuum drying method of processing the wood plank raw material provided by the present invention, described drying process adopt following steps to carry out:
Steps A, the wood plank raw material is put into drying chamber, and, adopt vaccum-pumping equipment to make the inner vacuum environment that forms of drying chamber again the sealing of drying chamber opening part;
Step B, heat, adopt 30 to 165 degrees centigrade heating-up temperature, heat and promptly obtain dry wood plank raw material finished product after 72 to 360 hours from the outside of drying chamber.
Further technical scheme is: described wood plank raw material is to be rule or irregular column round log.
Technical scheme further is: the pressure after the inner formation of the described drying chamber vacuum environment is 0.01 to 0.1 MPa.
Technical scheme further is: described drying chamber is the pipe that is horizontal placement, and the cross section maximum gauge of pipe is 20 to 80 centimetres.
Technical scheme further is: described drying chamber is the square tube that is horizontal placement, and its cross section maximum area is 300 to 5000 square centimeters.
Technical scheme further is: after near the broken core division processing round log middle part, carry out the operation of steps A again.
Technical scheme further is: described with near broken core division processing in the round log for being center line with its cross-sectional diameter, 3 centimetres of disalignments carry out axially broken core processing with interior.
Technical scheme further is: after earlier round log being placed the normal temperature environment air dry, carry out the operation of steps A again.
Technical scheme further is: described round log is placed the time of normal temperature environment air dry is 1400 to 5000 hours.
Compared with prior art; The invention has the beneficial effects as follows: through under vacuum condition, carrying out drying; Reduced the required temperature of water evaporates; Make the wood plank raw material under low relatively temperature, carry out drying, avoid the too high generation loss of raw material Yin Wendu, and the drying chamber of laterally placing helps its external heat.And a kind of vacuum drying method step of processing the wood plank raw material provided by the present invention is simple, is suitable for the dried of various timber, is particularly suitable for the dried of fast-growing woods timber, and range of application is wide.
The specific embodiment
Do further elaboration in the face of the present invention down.
Embodiment one
This kind embodiment of the present invention is that a kind of vacuum drying method of processing the wood plank raw material will be provided; Described drying means is for to place all or part of evaporation of the vacuum environment moisture that it is inner with the wood plank raw material; And the aforementioned wood plank raw material of mentioning is generally rule or irregular column round log; Definite says; The cross section of this round log is rounded or approach circle, and therefore the said round log in this place can be thought common fast-growing woods wood, also can think other forest that throughout the year gives birth to.
And the above-mentioned vacuum drying method of mentioning for directly round log being put into drying chamber, and with the sealing of drying chamber opening part, adopts vaccum-pumping equipment to make the inner vacuum environment that forms of drying chamber in this kind embodiment of the present invention again; Heat from the outside of drying chamber, the temperature of drying chamber external heat is 30 degrees centigrade in this kind of the present invention embodiment, and be 360 hours heat time heating time, promptly about 15 days, promptly obtains dry wood plank raw material after the completion.
The above-mentioned drying chamber of mentioning then is preferably pipe; And pipe laterally placed; This direction helps the outside of drying chamber is heated, and inventor of the present invention also finds, the caliber of the drying chamber of pipe shape is big more; Then its outside heat just is not easy to be passed to drying chamber inside more, so the cross section maximum gauge of drying chamber is elected 20 centimetres in the present embodiment as.
The above-mentioned purpose that round log is placed the sealed environment in the drying chamber is for reducing the required temperature of round log water content evaporation; Make it under low relatively temperature, to accomplish dry; Avoid damaging round log itself; And vaccum-pumping equipment can adopt for example vavuum pump or other similar devices, and the pressure of drying chamber inner vacuum environment is 0.1 MPa; And can adopt electrical heating or water to heat in the mode of above-mentioned heating; Heat energy that also can other form of reasonable use; For example the dense smoke that is produced in the boiler sintering procedure is used for the drying chamber external heat, reasonable energy utilization, definite says; So long as adopt heat energy, just can realize function of the present invention to the drying chamber external heat.
Embodiment two
This kind embodiment of the present invention is that a kind of vacuum drying method of processing the wood plank raw material will be provided; Described drying means is for to place all or part of evaporation of the vacuum environment moisture that it is inner with the wood plank raw material; And the aforementioned wood plank raw material of mentioning is generally rule or irregular column round log; Definite says; The cross section of this round log is rounded or approach circle, and therefore the said round log in this place can be thought common fast-growing woods wood, also can think other forest that throughout the year gives birth to.
And the above-mentioned vacuum drying method of mentioning for directly round log being put into drying chamber, and with the sealing of drying chamber opening part, adopts vaccum-pumping equipment to make the inner vacuum environment that forms of drying chamber in this kind embodiment of the present invention again; Heat from the outside of drying chamber, the temperature of drying chamber external heat is 80 degrees centigrade in this kind of the present invention embodiment, and be 180 hours heat time heating time, promptly about 7 days, promptly obtains dry wood plank raw material after the completion.
The above-mentioned drying chamber of mentioning then is preferably pipe; And pipe laterally placed; This direction helps the outside of drying chamber is heated, and inventor of the present invention also finds, the caliber of the drying chamber of pipe shape is big more; Then its outside heat just is not easy to be passed to drying chamber inside more, so the cross section maximum gauge of drying chamber is elected 50 centimetres in the present embodiment as.
The above-mentioned purpose that round log is placed the drying chamber sealed environment is for reducing the required temperature of round log water content evaporation; Make it under low relatively temperature, to accomplish dry; Avoid damaging the media fibers of round log itself; And vaccum-pumping equipment can adopt for example vavuum pump or other similar devices, and the pressure of drying chamber inner vacuum environment is 0.06 MPa; And can adopt the heating of electrical heating or water in the mode of above-mentioned heating, heat energy that also can other form of second use for example is used for the drying chamber external heated with the tail gas dense smoke that is produced in the boiler sintering procedure, reasonable energy utilization.
Embodiment three
This kind embodiment of the present invention and the foregoing description one are basic identical with embodiment two; Difference only is that in this kind embodiment round log being placed vacuum pressure is the drying chamber of 0.01 MPa between them; With 165 degrees centigrade temperature the outside of drying chamber is heated, and the heating time be 72 hours, promptly about 3 days; Promptly obtain dry wood plank raw material after the completion, and the cross section maximum gauge of the drying chamber that is adopted in this kind embodiment of the present invention is 80 centimetres.
Simultaneously for prevent that round log from deforming when dry in vacuum environment; Inventor of the present invention is through experiment; Think that the technical scheme that is more preferably to the foregoing description one to three is with near the broken core division processing described round log middle part; Saying so with its cross-sectional diameter more specifically is center line, and disalignment carries out axially broken core processing for about 3 centimetres, and the progress of processing is easily control like this; Help processing the wood plank raw material of better quality, reduce the stress deformation of round log in dry run.
What also need describe is; The pipe that is horizontal placement that is adopted among the embodiment one of the invention described above, embodiment two and the embodiment three is as the drying chamber of dried wood plank raw material; Inventor of the present invention finds that through experiment above-mentioned pipe can all replace with square tube, and the cross section maximum area of square tube can be according to the difference of replacement pipe diameter; In 300 to 5000 square centimeters scope, select the square tube with the corresponding size of pipe, realize the technique effect identical with pipe.
Embodiment four
This kind embodiment of the present invention is that a kind of vacuum drying method of processing the wood plank raw material will be provided; Described drying means is for making the inner all or part of evaporation of moisture of wood plank raw material with carrying out drying process again after broken core is cut apart near the wood plank raw material middle part; And the aforementioned wood plank raw material of mentioning is generally rule or irregular column round log; Definite says; The cross section of this round log is rounded or approach circle, and therefore the said round log in this place can be thought common fast-growing woods wood, also can think other forest that throughout the year gives birth to.
And the drying means of being mentioned in this kind embodiment of the present invention is with reference to three kinds of above-mentioned technological means that embodiment adopted; The round log that at first will break after core is cut apart is positioned over air dry in the normal temperature environment; The time of air dry can be selected arbitrarily in 1400 to 5000 hours parameter area; After the round log air dry after round log or broken core are cut apart, put it into again in the vacuum drying tank, it is placed under the vacuum environment; Further dry through the round log after from the drying chamber external heat core being cut apart again; The concrete time of vacuum drying can confirm that promptly obtain dry wood plank raw material after the completion, this kind embodiment is suitable for the heavier speed of moisture and gives birth to round log or other forest with reference to above-mentioned three kinds of embodiments.
What need describe is; The temperature of the vacuum drying time in the present embodiment and drying chamber heating all can confirm with reference to three kinds of above-mentioned embodiments, and in the vacuum drying time of the drying chamber that this kind embodiment carries out all can be for above-mentioned three kinds of embodiments the drying time of mentioning 50%.
" embodiment ", " another embodiment ", " embodiment " that is spoken of in this manual simultaneously, etc., refer to the concrete characteristic, structure or the characteristics that combine this embodiment to describe and be included among at least one embodiment of the application's generality description.A plurality of local appearance statement of the same race is not necessarily to refer to same embodiment in specification.Further, when describing a concrete characteristic, structure or characteristics in conjunction with arbitrary embodiment, what institute will advocate is that other embodiment of combination realize that this characteristic, drying steps or characteristics also fall within the scope of the invention.
Although invention has been described with reference to a plurality of explanatory embodiment of the present invention here; But; Should be appreciated that those skilled in the art can design a lot of other modification and embodiments, these are revised and embodiment will drop within disclosed principle scope of the application and the spirit.More particularly, in the scope of the open claim of the application, can carry out multiple modification and improvement to the method implementation step and/or the layout of subject combination layout.Except modification that method step and/or layout are carried out with improve, to those skilled in the art, other purposes also will be tangible.
Claims (9)
1. vacuum drying method of processing the wood plank raw material is characterized in that: described drying process adopts following steps to carry out:
Steps A, the wood plank raw material is put into drying chamber, and, adopt vaccum-pumping equipment to make the inner vacuum environment that forms of drying chamber again the sealing of drying chamber opening part;
Step B, heat, adopt 30 to 165 degrees centigrade heating-up temperature, heat and promptly obtain dry wood plank raw material finished product after 72 to 360 hours from the outside of drying chamber.
2. the vacuum drying method of processing wood plank raw material according to claim 1 is characterized in that: described wood plank raw material is to be rule or irregular column round log.
3. the vacuum drying method of processing wood plank raw material according to claim 1 and 2 is characterized in that: the pressure after the inner formation of the described drying chamber vacuum environment is 0.01 to 0.1 MPa.
4. the vacuum drying method of processing wood plank raw material according to claim 3 is characterized in that: described drying chamber is the pipe that is horizontal placement, and the cross section maximum gauge of pipe is 20 to 80 centimetres.
5. the vacuum drying method of processing wood plank raw material according to claim 3 is characterized in that: described drying chamber is the square tube that is horizontal placement, and its cross section maximum area is 300 to 5000 square centimeters.
6. the vacuum drying method of processing wood plank raw material according to claim 1 is characterized in that: after near the broken core division processing round log middle part, carry out the operation of steps A again.
7. the vacuum drying method of processing wood plank raw material according to claim 6 is characterized in that: described with near broken core division processing in the round log for being center line with its cross-sectional diameter, 3 centimetres of disalignments carry out axially broken core processing with interior.
8. the vacuum drying method of processing wood plank raw material according to claim 1 is characterized in that: after earlier round log being placed the normal temperature environment air dry, carry out the operation of steps A again.
9. the vacuum drying method of processing wood plank raw material according to claim 8 is characterized in that: described round log is placed the time of normal temperature environment air dry is 1400 to 5000 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2012100063853A CN102538408A (en) | 2012-01-10 | 2012-01-10 | Vacuum drying method for processing wood plate raw materials |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012100063853A CN102538408A (en) | 2012-01-10 | 2012-01-10 | Vacuum drying method for processing wood plate raw materials |
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| CN102538408A true CN102538408A (en) | 2012-07-04 |
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| CN2012100063853A Pending CN102538408A (en) | 2012-01-10 | 2012-01-10 | Vacuum drying method for processing wood plate raw materials |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103925774A (en) * | 2014-04-16 | 2014-07-16 | 中山市东成家具有限公司 | Drying method capable of fully exerting health care function of redwood furniture |
| CN105387691A (en) * | 2015-11-24 | 2016-03-09 | 南京林业大学 | Drying method for controlling wood collapse |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103925774A (en) * | 2014-04-16 | 2014-07-16 | 中山市东成家具有限公司 | Drying method capable of fully exerting health care function of redwood furniture |
| CN103925774B (en) * | 2014-04-16 | 2015-10-28 | 中山市东成家具有限公司 | The drying means of mahogany furniture health care can be given full play to |
| CN105387691A (en) * | 2015-11-24 | 2016-03-09 | 南京林业大学 | Drying method for controlling wood collapse |
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Application publication date: 20120704 |