CN102494519A - Method for drying fraxinus mandshurica wood floor base material - Google Patents
Method for drying fraxinus mandshurica wood floor base material Download PDFInfo
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- CN102494519A CN102494519A CN2011103867325A CN201110386732A CN102494519A CN 102494519 A CN102494519 A CN 102494519A CN 2011103867325 A CN2011103867325 A CN 2011103867325A CN 201110386732 A CN201110386732 A CN 201110386732A CN 102494519 A CN102494519 A CN 102494519A
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- floor base
- wood floor
- manchurian ash
- ash wood
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Abstract
The invention provides a method for drying a fraxinus mandshurica wood floor base material, which comprises the following steps of placing the fraxinus mandshurica wood floor base material in a drying kiln, enabling the temperature to rise to 50-56 DEG C at the speed of 0.8-1.6 DEG C per hour, and keeping the temperature for 7.5-8 hours; spraying steam at the temperature of 120-180 DEG C into the drying kiln, enabling air velocity of the steam to be 6-12m/s, enabling the temperature to rise to 60 DEG C, and enabling the relative humidify to rise to 60%-65%; keeping the temperature of 60 DEG C in the drying kiln to be stable, removing moisture for 6-7days and evenly reducing the relative humidify by 3-10%; detecting the water content of the fraxinus mandshurica wood floor base material, adding the steam into the drying kiln until the relative humidify rises to 60%-65% when the water content stops reducing, and then keeping the temperature and the relative humidity for 3-4 days; and repeating the former two steps until the water content of the fraxinus mandshurica wood floor base material reaches to an acceptance line. The method has good drying effects, high rate of finished products and low defective percentage.
Description
Technical field
The present invention relates to drying of wood field, be specifically related to a kind of drying means of Manchurian ash wood floor base material.
Background technology
The drying of wood can be divided into natural seasoning and artificial drying two big classes.Natural seasoning is through gravity-flow ventilation or forced ventilation, and timber absorbs the heat in the atmosphere, and the moisture in the evaporation timber reaches dry purpose.The natural seasoning major defect is that big, the whole moisture content of occupied ground is higher, drying time is long.Artificial drying method commonly used at present has conventional drying, high temperature drying, removal moisture drying, solar energy drying, vacuum drying, microwave and dielectric drying and flue gas drying etc.Advantages such as among all artificial drying methods, conventional drying is with a long history owing to having, technology maturation, fault dry mass, easy realization large industrialized drying, all in the highest flight, it accounts for more than 80% in China in the drying of wood industry at home and abroad.Removal moisture drying is an energy-saving drying technology owing to can reclaim the waste heat of dry exhaust, and removal moisture drying is to make drying medium with the normal pressure humid air, cross-ventilation heating timber.But conventional drying is the air humidity that reduces hothouse with the mode of inlet and outlet, and the heat loss that causes taking a breath is big.Humid air carries out closed cycle during removal moisture drying between dehumidifier and hothouse, and its relies on the principle of air conditioner refrigerating and heat supply, is heated to be hot-air after making the air setting dehydration, sends hothouse continuation desiccated wood again back to.Liberated heat relies on refrigeration working medium to reclaim during the humid air dehumidification, is used to heat the air behind the dehumidification again, compares with conventional drying, and its fractional energy savings is more than 40%.
The making on Manchurian ash wood floor mainly comprises drying, tongue and groove and lacquering technique, because the density of Manchurian ash is bigger, drying process is even more important in process of production; Drying time is long, although yield rate is very high, often causes the decline of production efficiency; Drying time is too short, reaches the technological requirement of making timber floor, tends to because the difference of the water content of Manchurian ash surfaces externally and internally; Cause the increase of defect rate, cause great waste.Existing timber floor especially is the drying process of wood floor base material with the Manchurian ash, can produce the defect rate of 3-6% generally speaking, and this has greatly increased production cost in process of production.
Summary of the invention
Technical problem to be solved by this invention provides a kind of drying means of Manchurian ash wood floor base material, and this method drying effect is good, yield rate is high, defect rate is low.
The technical scheme that the present invention adopted is:
A kind of drying means of Manchurian ash wood floor base material may further comprise the steps:
(1) the Manchurian ash wood floor base material is put into dry kiln, in dry kiln, is warming up to 50-56 ℃ according to 0.8-1.6 ℃ speed per hour, is incubated 7.5-8 hour then;
(2) in dry kiln, spray into 120-180 ℃ steam, the steam air velocity is 6～12m/s, and the temperature of dry kiln is risen to 60 ℃, and relative humidity rises to 60%-65%;
(3) keep dry in the kiln 60 ℃ stable; Dry kiln is carried out hydrofuge; The hydrofuge time is 4-7 days, and this moment, the moisture on Manchurian ash wood floor base material surface can promptly be discharged under 60 ℃ temperature conditions, makes in 4-7 days the relative humidity in the dry kiln is evenly reduced 3-10%;
(4) water content of detection Manchurian ash wood floor base material; When the water content of Manchurian ash wood floor base material stops to reduce; In dry kiln, add steam to relative humidity and rise to 60%-65%; Keep dry then in the kiln temperature with relative humidity 3-4 days, make the inner moisture formation water content gradient of Manchurian ash wood floor base material, emit;
(5) repeating step (3), step (4) reach acceptance line until the water content of Manchurian ash wood floor base material, and promptly the water content of Manchurian ash wood floor base material is below 14%.
As preferably, in dry kiln, be warming up to 53-56 degree centigrade in the said step (1) according to 0.8-1 ℃ speed per hour, be incubated 8 hours then.
As preferably, in dry kiln, spray into 160 ℃ steam to relative humidity 62% in the said step (2).
Compared with prior art; The present invention have following a bit and remarkable result: the present invention with the maximum temperature of dry kiln be fixed on 60 ℃ constant; Humidity through reducing repeatedly in the dry kiln forms certain water content gradient, makes the moisture in the Manchurian ash wood floor base material that volatilized effectively; In dry run, the baking temperature of Manchurian ash wood floor base material is constant, has reduced the distortion that the Manchurian ash wood floor base material causes because of expanding with heat and contract with cold, and especially prevents the warpage that causes because of the inner STRESS VARIATION of timber; In the hydrofuge process, repeatedly the Manchurian ash wood floor base material is incubated and sprays into steam, prevent, cause water content on the Manchurian ash wood floor base material all directions different and the sclerosis and the cracking phenomena that cause because temperature is too high; Under uniform temperature and damp condition, make the inner defective of Manchurian ash timber can obtain certain repairing simultaneously, reduce the loss of wood raw material.Drying means of the present invention can effectively must be controlled the dry mass of product, and the defect rate that makes the Manchurian ash wood floor base material is less than 3%.
The specific embodiment
Below in conjunction with embodiment the present invention is made further specific descriptions, but be not limited to this.
Embodiment 1:
A kind of drying means of Manchurian ash wood floor base material may further comprise the steps:
(1) will need dry Manchurian ash wood floor base material to put into dry kiln, in dry kiln, be warming up to 50 ℃, be incubated 8 hours then according to 0.8 ℃ speed per hour;
(2) in dry kiln, spray into 120 ℃ steam, the steam air velocity is 6m/s, and the temperature of dry kiln is risen to 60 ℃, and relative humidity rises to 60%.
(3) keep dry in the kiln 60 ℃ stable, open the humidity-discharging device at dry cellar for storing things, dry kiln is carried out hydrofuge, the hydrofuge time is 4-7 days, makes in 4-7 days the relative humidity in the dry kiln is evenly reduced 3-10%.
(4) through timber water content detection instrument; Detect the water content of Manchurian ash wood floor base material; When the water content of Manchurian ash wood floor base material stops to reduce; In dry kiln, add 120 ℃ of steam to relative humidity and rise to 60%, temperature (60 ℃) in the kiln that keeps dry then and relative humidity (60%) 3-4 days.
(5) repeating step (3), step (4) through hydrofuge process repeatedly, reach acceptance line until the water content of Manchurian ash wood floor base material, promptly below 14%.
Embodiment 2:
A kind of drying means of Manchurian ash wood floor base material may further comprise the steps:
(1) needs dry Manchurian ash wood floor base material put into dry kiln, in dry kiln, be warming up to 53 ℃, be incubated 8 hours then according to 1 ℃ speed per hour;
(2) in dry kiln, spray into 160 ℃ steam, the steam air velocity is 9m/s, and the temperature of dry kiln is risen to 60 ℃, and relative humidity rises to 62%.
(3) keep dry in the kiln 60 ℃ stable, open the humidity-discharging device at dry cellar for storing things, dry kiln is carried out hydrofuge, the hydrofuge time is 4-7 days, makes in 4-7 days the relative humidity in the dry kiln is evenly reduced 3-10%.
(4) through timber water content detection instrument; Detect the water content of Manchurian ash wood floor base material; When the water content of Manchurian ash wood floor base material stops to reduce; In dry kiln, add 160 ℃ of steam to relative humidity and rise to 62%, temperature (60 ℃) in the kiln that keeps dry then and relative humidity (62%) 3-4 days.
(5) repeating step (3), step (4) through hydrofuge process repeatedly, reach acceptance line until the water content of Manchurian ash wood floor base material, promptly below 14%.
Embodiment 3:
A kind of drying means of Manchurian ash wood floor base material may further comprise the steps:
(1) needs dry Manchurian ash wood floor base material put into dry kiln, in dry kiln, be warming up to 56 ℃, be incubated 7.5 hours then according to 1.6 ℃ speed per hour;
(2) in dry kiln, spray into 180 ℃ steam, the steam air velocity is 12m/s, and the temperature of dry kiln is risen to 60 ℃, and relative humidity rises to 65%.
(3) keep dry in the kiln 60 ℃ stable, open the humidity-discharging device at dry cellar for storing things, dry kiln is carried out hydrofuge, the hydrofuge time is 4-7 days, makes in 4-7 days the relative humidity in the dry kiln is evenly reduced 3-10%.
(4) through timber water content detection instrument; Detect the water content of Manchurian ash wood floor base material; When the water content of Manchurian ash wood floor base material stops to reduce; In dry kiln, add 180 ℃ of steam to relative humidity and rise to 65%, temperature (60 ℃) in the kiln that keeps dry then and relative humidity (65%) 3-4 days.
(5) repeating step (3), step (4) through hydrofuge process repeatedly, reach acceptance line until the water content of Manchurian ash wood floor base material, promptly below 14%.
To the foregoing description 1-3 dry Manchurian ash wood floor base material detect, its defect rate is all less than 3%.
The above embodiment of the present invention is can not be used to limit the present invention to explanation of the present invention, and implication suitable with claims of the present invention and any change in the scope all should be thought to be included in the scope of claims.
Claims (5)
1. the drying means of a Manchurian ash wood floor base material is characterized in that: may further comprise the steps:
(1) the Manchurian ash wood floor base material is put into dry kiln, in dry kiln, is warming up to 50-56 ℃ according to 0.8-1.6 ℃ speed per hour, is incubated 7.5-8 hour then;
(2) in dry kiln, spray into 120-180 ℃ steam, the steam air velocity is 6～12m/s, and the temperature of dry kiln is risen to 60 ℃, and relative humidity rises to 60%-65%;
(3) keep dry in the kiln 60 ℃ stable, dry kiln is carried out hydrofuge, the hydrofuge time is 4-7 days, and relative humidity in the dry kiln is evenly reduced 3-10%;
(4) detect the water content of Manchurian ash wood floor base material, when the water content of Manchurian ash wood floor base material stops to reduce, in dry kiln, add steam to relative humidity and rise to 60%-65%, the temperature in the kiln that keeps dry then and relative humidity 3-4 days;
(5) repeating step (3), step (4) reach acceptance line until the water content of Manchurian ash wood floor base material.
2. the drying means of a kind of Manchurian ash wood floor base material according to claim 1 is characterized in that: in dry kiln, be warming up to 53-56 degree centigrade according to 0.8-1 ℃ speed per hour in the said step (1), be incubated 8 hours then.
3. the drying means of a kind of Manchurian ash wood floor base material according to claim 1 is characterized in that: said step sprays into steam to relative humidity 62% in (2) in dry kiln.
4. the drying means of a kind of Manchurian ash wood floor base material according to claim 1 is characterized in that: the steam that in dry kiln, sprays into 160 ℃ in the said step (2).
5. the drying means of a kind of Manchurian ash wood floor base material according to claim 1 is characterized in that: the water content of Manchurian ash wood floor base material reaches water content that acceptance line refers to the Manchurian ash wood floor base material below 14% in the said step (5).
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011103867325A CN102494519A (en) | 2011-11-29 | 2011-11-29 | Method for drying fraxinus mandshurica wood floor base material |
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| CN2011103867325A CN102494519A (en) | 2011-11-29 | 2011-11-29 | Method for drying fraxinus mandshurica wood floor base material |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103317581A (en) * | 2013-06-19 | 2013-09-25 | 叶集金桦木地板有限公司 | Drying and processing technology for solid wood geothermal floor |
| CN109556357A (en) * | 2018-11-09 | 2019-04-02 | 大亚(江苏)地板有限公司 | A kind of floor drying means of red gum |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2534714A (en) * | 1947-04-21 | 1950-12-19 | William P Hoffman | Wood conditioning process |
| CN1044333A (en) * | 1989-01-17 | 1990-08-01 | 佐藤次郎 | The method of the drying of wood and device thereof |
| CN1138686A (en) * | 1996-04-01 | 1996-12-25 | 唐自武 | Tech. for processing timber by means of high temp. super-high temp. negtive pressure for removing moisture and insects, its appts. and products |
| CN1815115A (en) * | 2006-03-13 | 2006-08-09 | 张云辉 | Wood rapid-drying method |
| FI117520B (en) * | 2001-02-09 | 2006-11-15 | Arboreo Technologies Ltd Oy | A method for treating and drying wood |
| CN1995881A (en) * | 2006-12-27 | 2007-07-11 | 浙江永吉木业有限公司 | Wood floor drying method |
| CN101231132A (en) * | 2008-01-30 | 2008-07-30 | 金国庆 | Wood drying technique |
| CN101738060A (en) * | 2009-12-10 | 2010-06-16 | 姜金法 | Process for drying timber |
-
2011
- 2011-11-29 CN CN2011103867325A patent/CN102494519A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2534714A (en) * | 1947-04-21 | 1950-12-19 | William P Hoffman | Wood conditioning process |
| CN1044333A (en) * | 1989-01-17 | 1990-08-01 | 佐藤次郎 | The method of the drying of wood and device thereof |
| CN1138686A (en) * | 1996-04-01 | 1996-12-25 | 唐自武 | Tech. for processing timber by means of high temp. super-high temp. negtive pressure for removing moisture and insects, its appts. and products |
| FI117520B (en) * | 2001-02-09 | 2006-11-15 | Arboreo Technologies Ltd Oy | A method for treating and drying wood |
| CN1815115A (en) * | 2006-03-13 | 2006-08-09 | 张云辉 | Wood rapid-drying method |
| CN1995881A (en) * | 2006-12-27 | 2007-07-11 | 浙江永吉木业有限公司 | Wood floor drying method |
| CN101231132A (en) * | 2008-01-30 | 2008-07-30 | 金国庆 | Wood drying technique |
| CN101738060A (en) * | 2009-12-10 | 2010-06-16 | 姜金法 | Process for drying timber |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103317581A (en) * | 2013-06-19 | 2013-09-25 | 叶集金桦木地板有限公司 | Drying and processing technology for solid wood geothermal floor |
| CN103317581B (en) * | 2013-06-19 | 2015-10-28 | 叶集金桦木地板有限公司 | Solid wood geothermal energy floor drying and processing technology |
| CN109556357A (en) * | 2018-11-09 | 2019-04-02 | 大亚(江苏)地板有限公司 | A kind of floor drying means of red gum |
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Application publication date: 20120613 |