CN109332121A - A kind of furnace drying method of timber - Google Patents
A kind of furnace drying method of timber Download PDFInfo
- Publication number
- CN109332121A CN109332121A CN201811235019.9A CN201811235019A CN109332121A CN 109332121 A CN109332121 A CN 109332121A CN 201811235019 A CN201811235019 A CN 201811235019A CN 109332121 A CN109332121 A CN 109332121A
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- Prior art keywords
- timber
- drying
- kiln
- moisture
- keeps
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- 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
- F26B5/00—Drying solid materials or objects by processes not involving the application of heat
- F26B5/04—Drying solid materials or objects by processes not involving the application of heat by evaporation or sublimation of moisture under reduced pressure, e.g. in a vacuum
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
- B05D3/0254—After-treatment
- B05D3/029—After-treatment with microwaves
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/06—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to wood
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/02—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (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 furnace drying methods of timber, include the following steps: step S1: Free water drying；Step S2: raw material brushing；Step S3: attached water drying.Timber stoving method provided by the invention carries out progressive drying according to the difference of wood internal moisture type, improves the degree of drying of timber, reduce the moisture content in timber；In addition, timber stoving method provided by the invention is before carrying out the moisture drying in microcapillary system to timber, in timber table full-filling brush hygroscopic powder and anti-cracking agent, on the one hand the precipitation of moisture in timber is accelerated, on the other hand crack occurs after avoiding timber stoving, improves the dries quantity of timber.
Description
Technical field:
The present invention relates to a kind of furnace drying methods of timber.
Background technique:
Timber is a kind of common building material, is used in present every field extensively, since the use of timber will be to timber
Water content, moisture content there is stringent control, therefore after carrying out preliminary working to timber need that timber is dried, therefore often make
With timber drying device kiln dried wood to control its water content and moisture content.
Capillary system in timber has two major classes, i.e., big tubule system and microcapillary system；Moisture in timber is just
It is present among these capillary systems；Moisture in timber is divided into Free water and attached water according to type.
The big capillary system being made of lumen, to the binding force very little of moisture so that chainless power, moisture can be from
The section of big capillary system is freely evaporated；Therefore, the moisture being present in big capillary system, it is called freedom
Water；The increase and decrease of Free water can only influence weight, preservation and the burning capacity of timber, the property without influencing timber.
The microcapillary system being made of the cell wall mutually to interlink, to the binding force that moisture has degree different, to make
Moisture in microcapillary system is to evaporative air, it is necessary to the humidity of air is reduced to certain degree；Or in fire-bar
The movement for accelerating moisture under part, can just overcome the binding force of microcapillary, to air evaporation；Meanwhile microcapillary system is not
But under certain conditions to air evaporation moisture, and the moisture in air can be absorbed；Therefore, being present in microtriche
Moisture in tubule system is called hygroscopic water, and the increase and decrease of hygroscopic water not only makes timber expand and shrink, but also
Influence other physico-mechanical properties of timber.
If number of patent application is that 201310102656.X discloses a kind of timber stoving method for solid wood furniture, dry
Step is that code air-dries pile in drying kiln by timber wet plate, drying and processing then through five heating and moistenings, is stopped small through 48 after kiln
Shi Yangsheng is to get finished product.It is including as follows if number of patent application is 201711119432.4 to disclose a kind of furnace drying method of timber
Baking step: by timber wet plate, code air-dries pile in dry kiln, is passed through steam, by about 120 hour steam dryings, cooperation
Temperature appropriate, and the timber using the hydrofuge of a period of time, after being dried.Foregoing invention patent is to timber stoving mistake
Cheng Zhongjun does not solve following problems: cracking during timber stoving, causes second-rate after timber stoving, it is difficult to two
Secondary processing causes certain inconvenience to the use of people.
Summary of the invention:
The present invention has made improvements in view of the above-mentioned problems of the prior art, i.e., technical problem to be solved by the invention is to provide
A kind of furnace drying method of timber, not only design is reasonable, but also effectively solves the problems, such as the cracking during timber stoving.
To achieve the goals above, the technical solution adopted by the present invention is that: a kind of furnace drying method of timber, including dry as follows
Dry step:
Step S1, Free water drying:
Step S11: timber to be dried is transferred in drying box, is heated so that the temperature in drying box is maintained at 60~85 °
C then starts interior circulating fan, internal air circulation is carried out in drying box；
Step S12: the vacuum pump that starting is connected with drying box keeps negative pressure so that the negative pressure in drying box reaches -0.1MPa
State 2~3 hours, drying box is interior to generate a large amount of moisture and moisture；
Step S13: opening the exhaust valve on drying box, and moisture and moisture in drying box is discharged；
Step S2, raw material brushing:
Step S21: will be by step S1 treated wood surface brushing hygroscopic powder, and stand 5~10 days；
Step S22: it is brushed away after the hygroscopic powder of wood surface air-dries, then the brushing anti-cracking agent at butt end；
Step S3, attached water drying:
Step S31: the timber that anti-cracking agent is painted in step S2 is arranged in drying kiln；
Step S32: timber is located at the 1st day in drying kiln, and steam is passed through in drying kiln, makes to dry kiln temperature holding 60
DEG C, humidity keeps 50%, sprays primary steam every 1 hour；Multiple microwave generators are set inside drying kiln simultaneously, it is multiple
Microwave occurs to dry timber by the collective effect of steam and microwave to radiation microwave electromagnetic field is generated in drying kiln；
Step S33: timber is located at the 2-5 days in drying kiln, keeps temperature 70 C in drying kiln, and humidity is maintained at 55%, every
4 hours spray primary steams；
Step S34: timber is located at the 6-10 days in drying kiln, keeps temperature 50 C in drying kiln, and humidity is maintained at 22%, dries
Exhausting window in dry kiln is opened 5 hours, is closed 1 hour；
Step S35: material is located at the 11-15 days in drying kiln, keeps the temperature 50 C in drying kiln, and humidity is maintained at 18%, row
Transom window keeps ventilation state, timber after must drying.
Further, the hygroscopic powder in the step S2 is in precipitated calcium carbonate, heavy calcium activated, calcium oxide and dry powder
One or more.
Further, the anti-cracking agent in the step S22 is one or more of palm oil, pine tar, Chinese catalpa oil and tung oil
Mixture.
Further, the timber that anti-cracking agent is painted in the step S31, which vertically stacks, to be placed in drying kiln, and on
Lower layer's timber intersection shifts to install.
Further, the spacing for adjacent two timber being located on the same floor is 0.5m.
Compared with prior art, the present invention has the effect that
(1) the present invention has rational design, carries out progressive drying according to the difference of wood internal moisture type, avoids timber internal cause
Free water and attached water dry the water in big tubule system simultaneously as heating power evaporation results in the generation in timber crack first
Point, secondly the moisture in microcapillary system is dried, the degree of drying of timber is improved, reduces aqueous in timber
Rate；
(2) present invention is before carrying out the moisture drying in microcapillary system to timber, in timber table full-filling brush hygroscopic powder and
With incision brushing anti-cracking agent, the precipitation of moisture in timber is on the one hand accelerated, is occurred after on the other hand avoiding timber stoving
Crack improves the dries quantity of timber.
Detailed description of the invention:
Fig. 1 is the workflow schematic diagram of the embodiment of the present invention.
Specific embodiment:
The present invention will be further described in detail with reference to the accompanying drawings and detailed description.
As shown in Figure 1, embodiment one:
A kind of furnace drying method of timber of the present invention, including following baking step:
Step S1, Free water drying:
Step S11: timber to be dried is transferred in drying box, and heating connects so that the temperature in drying box is maintained at 60 °C
Start in circulating fan, internal air circulation is carried out in drying box；
Step S12: the vacuum pump that starting is connected with drying box keeps negative pressure so that the negative pressure in drying box reaches -0.1MPa
State 2 hours, drying box is interior to generate a large amount of moisture and moisture；
Step S13: opening the exhaust valve on drying box, and moisture and moisture in drying box is discharged；
Step S2, raw material brushing:
Step S21: will be by step S1 treated wood surface brushing hygroscopic powder, and stand 5~10 days；
Step S22: it is brushed away after the hygroscopic powder of wood surface air-dries, then the brushing anti-cracking agent at butt end；
Step S3, attached water drying:
Step S31: the timber that anti-cracking agent is painted in step S2 is arranged in drying kiln；
Step S32: timber is located at the 1st day in drying kiln, and steam is passed through in drying kiln, makes to dry kiln temperature holding 60
DEG C, humidity keeps 50%, sprays primary steam every 1 hour；Multiple microwave generators are set inside drying kiln simultaneously, it is multiple
Microwave occurs to dry timber by the collective effect of steam and microwave to radiation microwave electromagnetic field is generated in drying kiln；
Step S33: timber is located at the 2-5 days in drying kiln, keeps temperature 70 C in drying kiln, and humidity is maintained at 55%, every
4 hours spray primary steams；
Step S34: timber is located at the 6-10 days in drying kiln, keeps temperature 50 C in drying kiln, and humidity is maintained at 22%, dries
Exhausting window in dry kiln is opened 5 hours, is closed 1 hour；
Step S35: material is located at the 11-15 days in drying kiln, keeps the temperature 50 C in drying kiln, and humidity is maintained at 18%, row
Transom window keeps ventilation state, timber after must drying.
In the present embodiment, the hygroscopic powder in the step S2 is precipitated calcium carbonate, heavy calcium activated, calcium oxide and dry powder
One or more of.
In the present embodiment, the anti-cracking agent in the step S22 is one of palm oil, pine tar, Chinese catalpa oil and tung oil or several
Kind mixture.
In the present embodiment, the timber that anti-cracking agent is painted in the step S31, which vertically stacks, to be placed in drying kiln, and
Upper and lower level timber intersection shifts to install.And the spacing for adjacent two timber being located on the same floor is 0.5m.
In the present embodiment, the exhaust valve is exhaust solenoid valve.
Embodiment two: the furnace drying method of the timber includes the following steps:
Step S1, Free water drying:
Step S11: timber to be dried is transferred in drying box, and heating connects so that the temperature in drying box is maintained at 70 °C
Start in circulating fan, internal air circulation is carried out in drying box；
Step S12: the vacuum pump that starting is connected with drying box keeps negative pressure so that the negative pressure in drying box reaches -0.1MPa
State 2.5 hours, drying box is interior to generate a large amount of moisture and moisture；
Step S13: opening the exhaust valve on drying box, and moisture and moisture in drying box is discharged；
Step S2, raw material brushing:
Step S21: will (hygroscopic powder is for precipitated calcium carbonate, heavy by step S1 treated wood surface brushing hygroscopic powder
One or more of calcium activated, calcium oxide and dry powder), and stand 5~10 days；
Step S22: it is brushed away after the hygroscopic powder of wood surface air-dries, then the brushing anti-cracking agent (anticracking at butt end
Agent is one or more of palm oil, pine tar, Chinese catalpa oil and tung oil mixture)；
Step S3, attached water drying:
Step S31: the timber that anti-cracking agent is painted in step S2 is arranged in drying kiln；
Step S32: timber is located at the 1st day in drying kiln, and steam is passed through in drying kiln, makes to dry kiln temperature holding 60
DEG C, humidity keeps 50%, sprays primary steam every 1 hour；Multiple microwave generators are set inside drying kiln simultaneously, it is multiple
Microwave occurs to dry timber by the collective effect of steam and microwave to radiation microwave electromagnetic field is generated in drying kiln；
Step S33: timber is located at the 2-5 days in drying kiln, keeps temperature 70 C in drying kiln, and humidity is maintained at 55%, every
4 hours spray primary steams；
Step S34: timber is located at the 6-10 days in drying kiln, keeps temperature 50 C in drying kiln, and humidity is maintained at 22%, dries
Exhausting window in dry kiln is opened 5 hours, is closed 1 hour；
Step S35: material is located at the 11-15 days in drying kiln, keeps the temperature 50 C in drying kiln, and humidity is maintained at 18%, row
Transom window keeps ventilation state, timber after must drying.
Embodiment three: the furnace drying method of the timber includes the following steps:
Step S1, Free water drying:
Step S11: timber to be dried is transferred in drying box, and heating connects so that the temperature in drying box is maintained at 85 °C
Start in circulating fan, internal air circulation is carried out in drying box；
Step S12: the vacuum pump that starting is connected with drying box keeps negative pressure so that the negative pressure in drying box reaches -0.1MPa
State 3 hours, drying box is interior to generate a large amount of moisture and moisture；
Step S13: opening the exhaust valve on drying box, and moisture and moisture in drying box is discharged；
Step S2, raw material brushing:
Step S21: will (hygroscopic powder is for precipitated calcium carbonate, heavy by step S1 treated wood surface brushing hygroscopic powder
One or more of calcium activated, calcium oxide and dry powder), and stand 5~10 days；
Step S22: it is brushed away after the hygroscopic powder of wood surface air-dries, then the brushing anti-cracking agent (anticracking at butt end
Agent is one or more of palm oil, pine tar, Chinese catalpa oil and tung oil mixture)；
Step S3, attached water drying:
Step S31: the timber that anti-cracking agent is painted in step S2 is arranged in drying kiln；
Step S32: timber is located at the 1st day in drying kiln, and steam is passed through in drying kiln, makes to dry kiln temperature holding 60
DEG C, humidity keeps 50%, sprays primary steam every 1 hour；Multiple microwave generators are set inside drying kiln simultaneously, it is multiple
Microwave occurs to dry timber by the collective effect of steam and microwave to radiation microwave electromagnetic field is generated in drying kiln；
Step S33: timber is located at the 2-5 days in drying kiln, keeps temperature 70 C in drying kiln, and humidity is maintained at 55%, every
4 hours spray primary steams；
Step S34: timber is located at the 6-10 days in drying kiln, keeps temperature 50 C in drying kiln, and humidity is maintained at 22%, dries
Exhausting window in dry kiln is opened 5 hours, is closed 1 hour；
Step S35: material is located at the 11-15 days in drying kiln, keeps the temperature 50 C in drying kiln, and humidity is maintained at 18%, row
Transom window keeps ventilation state, timber after must drying.
It is obvious to a person skilled in the art that invention is not limited to the details of the above exemplary embodiments, Er Qie
In the case where without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended power
Benefit requires rather than above description limits, it is intended that all by what is fallen within the meaning and scope of the equivalent elements of the claims
Variation is included within the present invention.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped
Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should
It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
The other embodiments being understood that.
Claims (5)
1. a kind of furnace drying method of timber, it is characterised in that: including following baking step:
Step S1, Free water drying:
Step S11: timber to be dried is transferred in drying box, is heated so that the temperature in drying box is maintained at 60~85 °
C then starts interior circulating fan, internal air circulation is carried out in drying box；
Step S12: the vacuum pump that starting is connected with drying box keeps negative pressure so that the negative pressure in drying box reaches -0.1MPa
State 2~3 hours, drying box is interior to generate a large amount of moisture and moisture；
Step S13: opening the exhaust valve on drying box, and moisture and moisture in drying box is discharged；
Step S2, raw material brushing:
Step S21: will be by step S1 treated wood surface brushing hygroscopic powder, and stand 5~10 days；
Step S22: it is brushed away after the hygroscopic powder of wood surface air-dries, then the brushing anti-cracking agent at butt end；
Step S3, attached water drying:
Step S31: the timber that anti-cracking agent is painted in step S2 is arranged in drying kiln；
Step S32: timber is located at the 1st day in drying kiln, and steam is passed through in drying kiln, makes to dry kiln temperature holding 60
DEG C, humidity keeps 50%, sprays primary steam every 1 hour；Multiple microwave generators are set inside drying kiln simultaneously, it is multiple
Microwave occurs to dry timber by the collective effect of steam and microwave to radiation microwave electromagnetic field is generated in drying kiln；
Step S33: timber is located at the 2-5 days in drying kiln, keeps temperature 70 C in drying kiln, and humidity is maintained at 55%, every
4 hours spray primary steams；
Step S34: timber is located at the 6-10 days in drying kiln, keeps temperature 50 C in drying kiln, and humidity is maintained at 22%, dries
Exhausting window in dry kiln is opened 5 hours, is closed 1 hour；
Step S35: material is located at the 11-15 days in drying kiln, keeps the temperature 50 C in drying kiln, and humidity is maintained at 18%, row
Transom window keeps ventilation state, timber after must drying.
2. a kind of furnace drying method of timber according to claim 1, it is characterised in that: the hygroscopic powder in the step S2 is
One or more of precipitated calcium carbonate, heavy calcium activated, calcium oxide and dry powder.
3. a kind of furnace drying method of timber according to claim 1, it is characterised in that: the anti-cracking agent in the step S22
For one or more of palm oil, pine tar, Chinese catalpa oil and tung oil mixture.
4. a kind of furnace drying method of timber according to claim 1, it is characterised in that: be painted in the step S31 anti-
The timber for splitting agent, which vertically stacks, to be placed in drying kiln, and upper and lower level timber intersection shifts to install.
5. a kind of furnace drying method of timber according to claim 4, it is characterised in that: adjacent two wood being located on the same floor
The spacing of material is 0.5m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811235019.9A CN109332121A (en) | 2018-10-23 | 2018-10-23 | A kind of furnace drying method of timber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811235019.9A CN109332121A (en) | 2018-10-23 | 2018-10-23 | A kind of furnace drying method of timber |
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| Publication Number | Publication Date |
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| CN109332121A true CN109332121A (en) | 2019-02-15 |
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ID=65311087
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811235019.9A Pending CN109332121A (en) | 2018-10-23 | 2018-10-23 | A kind of furnace drying method of timber |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110940152A (en) * | 2019-11-14 | 2020-03-31 | 国家林业和草原局竹子研究开发中心 | Microwave rapid continuous drying method for bamboo wood |
| CN113653433A (en) * | 2021-06-01 | 2021-11-16 | 广东玛格家居有限公司 | Door core structure and manufacturing method |
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| CN106403519A (en) * | 2016-09-20 | 2017-02-15 | 阜南县环宇柳木工艺制品有限公司 | Wood material drying method |
| CN107621133A (en) * | 2017-09-20 | 2018-01-23 | 中南林业科技大学 | A kind of linden method for drying wood |
| CN107830725A (en) * | 2015-12-10 | 2018-03-23 | 福建省慧通工艺品有限公司 | A kind of furnace drying method of timber |
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2018
- 2018-10-23 CN CN201811235019.9A patent/CN109332121A/en active Pending
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| CN107830725A (en) * | 2015-12-10 | 2018-03-23 | 福建省慧通工艺品有限公司 | A kind of furnace drying method of timber |
| CN106403519A (en) * | 2016-09-20 | 2017-02-15 | 阜南县环宇柳木工艺制品有限公司 | Wood material drying method |
| CN107621133A (en) * | 2017-09-20 | 2018-01-23 | 中南林业科技大学 | A kind of linden method for drying wood |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110940152A (en) * | 2019-11-14 | 2020-03-31 | 国家林业和草原局竹子研究开发中心 | Microwave rapid continuous drying method for bamboo wood |
| CN113653433A (en) * | 2021-06-01 | 2021-11-16 | 广东玛格家居有限公司 | Door core structure and manufacturing method |
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