CN103273546A - Method for preparing heat treatment wood through binary mixed gas - Google Patents
Method for preparing heat treatment wood through binary mixed gas Download PDFInfo
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- CN103273546A CN103273546A CN2013102091640A CN201310209164A CN103273546A CN 103273546 A CN103273546 A CN 103273546A CN 2013102091640 A CN2013102091640 A CN 2013102091640A CN 201310209164 A CN201310209164 A CN 201310209164A CN 103273546 A CN103273546 A CN 103273546A
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Abstract
The invention provides a method for preparing heat treatment wood through binary mixed gas, which relates to a preparation method of heat treatment wood, and solves the problems in an existing heat treatment wood production manner that a heat treatment medium is nitrogen or plant oil which seriously pollutes the environment and is high in cost. The method disclosed by the invention is comprises the following steps of: step 1, selecting flat wood; step 2, drying the selected wood by manpower until the water content of the wood is 8%-13%; step 3, placing the wood, which is manually dried to be qualified, into a heat treatment room; step 4, heating the wood, which is placed in the heat treatment room, by binary mixed gas; step 5, keeping the heat for 1-12 hours when the heat treatment temperature reaches 150-240 DEG C; and step 6, after the temperature of the heat treatment room is reduced to 30-60 DEG C, taking out the wood to prepare the heat treatment wood. The method disclosed by the invention is used for preparing the wood.
Description
Technical field
The present invention relates to a kind of preparation method of heat-treated wood, be specifically related to a kind of method for preparing heat-treated wood by binary mixture.
Background technology
Being raw material with timber, under 150 ℃～260 ℃ (150 ℃-190 ℃ in Holland, 180 ℃-260 ℃ in Germany) temperature, is medium with gas such as steam, air (weary oxygen), nitrogen or vegetable oil, and heating resulting product is " heat-treated wood "." heat-treated wood " is a kind of simple physical method that adopts, and in selected medium, carries out superhigh temperature and handles, and makes its biological structure, chemical composition and key property that the Wood products of some variation take place.In selected medium, to compare with script timber through the resulting heat-treated wood of superhigh temperature heat treated, its performance has colour stable, euphorosia, and biodurable height and dimensional stability wait three outstanding characteristics well.
The timber heat treatment technics is a kind of new lumber functionality improvement technology, can improve Wood Dimensional Stability, durability, rotproofness, the color of anti-biological damage and acquisition precious timber, and because not adding any chemical agent in the processing procedure, do not add any external material yet, so the timber after high-temperature heat treatment is environmental protection, except a small amount of chemical constituent that timber produces in pyrolytic process, without any other introduction or the release of chemical substance, so can not cause any pollution to environment, be typical environmentally friendly material, the timber heat treatment technics is one real " environmental protection lumber functionality improvement technology ".
After the nineties in 20th century, Finland, Holland, France, Germany, Canada, Turkey, Japan and other countries are furtherd investigate and are developed the heat treatment technics of timber in succession.The treatment process of timber heat treatment technics has fundamental influence to the final performance of timber, as parameters such as heat treatment time, temperature, the rate of heat addition, timber kind, initial aqueous rate, treating of wood sizes, all can influence the final performance of product.How the heat treated key of timber is that according to the application target of product, the use field is heat-treated the parameter of technology and set, and improves properties of product with the best, the coordinating and unifying of balance mechanical property and usage space.
But, no matter be Finland
France
The oil of the Plato of Holland, Germany is handled, or the emerging Westwood heat treatment technics of the U.S., the heat-treatment medium that adopts is for nitrogen or be vegetable oil, and its anti-breathing rate reaches 50% at most, and production process exists to be polluted, and has had a strong impact on the production efficiency of heat-treated wood; Nitrogen or vegetable oil are with high costs in addition, have also influenced the economic benefit of heat-treated wood.
Summary of the invention
The objective of the invention is for solving in the existing heat-treated wood mode of production, the heat-treatment medium that adopts is nitrogen or vegetable oil, all exist environmental pollution problem serious, with high costs, propose a kind of method for preparing heat-treated wood by binary mixture.
The inventive method realizes by following steps:
Step 1, choose smooth timber;
Step 2, be 8%～13% with timber artificial drying to the moisture content chosen;
Step 3, the timber that artificial drying is qualified are positioned over thermal chamber;
Step 4, use binary mixture heat the timber of placing in the thermal chamber;
Step 5, after heat treatment temperature reaches 150 ℃～240 ℃, be incubated 1～12 hour;
After step 6, room temperature to be heated are down to 30 ℃～60 ℃, timber is taken out, namely get the heat-treated wood of preparation.
The present invention compared with prior art has the following advantages: one, the heat-treatment medium of the present invention's employing is binary mixture (being the mist of nitrogen and carbon dioxide), and this mist is pollution-free.Heat by nitrogen and carbon dioxide, the anti-breathing rate of the heat-treated wood of preparation is more than 58%, and therefore, dimensional stability is good.Two, the inventive method technology is simple, and is workable, reduced the heat-treated wood production cost.Three, nitrogen and carbon dioxide can by the various discarded objects in the timber processing such as sawdust or wood chip, the remaining stalk in various crops harvesting back, various herbal branches footpath, etc. various living beings waste combustions prepared.These material sources are extensive, with low cost, and have characteristics such as renewable.
Description of drawings:
Fig. 1 is the horizontal vertical type stacking of plate face schematic diagram in the specific embodiment five (mark 1 is sheet material among the figure, and mark 2 is filler strip).
The specific embodiment
The specific embodiment one: present embodiment realizes by following steps:
Step 1, choose smooth timber;
Step 2, be 8%～13% with timber artificial drying to the moisture content chosen;
Step 3, the timber that artificial drying is qualified are positioned over thermal chamber;
Step 4, use binary mixture heat the timber of placing in the thermal chamber;
Step 5, after heat treatment temperature reaches 150 ℃～240 ℃, be incubated 1～12 hour;
After step 6, room temperature to be heated are down to 30 ℃～60 ℃, timber is taken out, namely get the heat-treated wood of preparation.The anti-breathing rate of this timber is 58.7%, and dimensional stability is good.
The specific embodiment two: present embodiment is that the timber in the step 1 is sheet material, rotten, nothing bending that sheet material should not have.Even to guarantee the thermal effectiveness color.Other step is identical with the specific embodiment one.
The specific embodiment three: present embodiment is that the length of the sheet material in the step 1 is 2 meters～6 meters.Other step is identical with the specific embodiment two.
The specific embodiment four: present embodiment is to be 10% with timber artificial drying to moisture content in the step 2.Other step is identical with the specific embodiment one.
The specific embodiment five: present embodiment is that the way of stacking of taking in the step 3 is the horizontal vertical type stacking of plate face, sees Fig. 1.This way of stacking can guarantee that thermal current can evenly circulate between stack wood.Other step is identical with the specific embodiment one.
The specific embodiment six: present embodiment is the gap that needs to keep 1～10cm between each sheet material.To guarantee that thermal current can evenly circulate between stack wood.Other step is identical with the specific embodiment five.
The specific embodiment seven: present embodiment is that binary mixture is nitrogen and carbon dioxide in the step 4, and the volume ratio of its nitrogen and carbon dioxide is 1～6: 2.The mist of nitrogen and carbon dioxide can be by various abandoned biomass material combustion preparations such as stalk, sawdust, straw, cotton stalk.The volume ratio of nitrogen and carbon dioxide is 2: 1 o'clock, and the anti-breathing rate of this timber that obtains is 58.7%; The volume ratio of nitrogen and carbon dioxide is 3: 1 o'clock, and the anti-breathing rate of this timber that obtains is 60.7%; The volume ratio of nitrogen and carbon dioxide is 1: 2 o'clock, and the anti-breathing rate of this timber that obtains is 59.8%; Draw thus, adopt nitrogen and carbon dioxide as heat-treatment medium, the wood dimensional stability of preparation is good.Other step is identical with the specific embodiment six.
The specific embodiment eight: present embodiment is that heat treatment temperature is 170 ℃ in the step 5.Other step is identical with the specific embodiment one.
The specific embodiment nine: present embodiment is that the heat treatment temperature retention time is 10 hours in the step 5.Other step is identical with the specific embodiment eight.
The specific embodiment ten: present embodiment is that heat treatment temperature need be down to 40 ℃ in the step 6.Other step is identical with the specific embodiment one.
Claims (10)
1. one kind prepares the method for heat-treated wood by binary mixture, and it is characterized in that: described method realizes by following steps:
Step 1, choose smooth timber;
Step 2, be 8%～13% with timber artificial drying to the moisture content chosen;
Step 3, the timber that artificial drying is qualified are positioned over thermal chamber;
Step 4, use binary mixture heat the timber of placing in the thermal chamber;
Step 5, after heat treatment temperature reaches 150 ℃～240 ℃, be incubated 1～12 hour;
After step 6, room temperature to be heated are down to 30 ℃～60 ℃, timber is taken out, namely get the heat-treated wood of preparation.
2. prepare the method for heat-treated wood according to claim 1 is described by binary mixture, it is characterized in that: the timber in the described step 1 is sheet material, and that sheet material should not have is rotten, it is crooked not have.
3. prepare the method for heat-treated wood according to claim 2 is described by binary mixture, it is characterized in that: the length of the sheet material in the described step 1 is 2 meters～6 meters.
4. prepare the method for heat-treated wood according to claim 1 is described by binary mixture, it is characterized in that: be 10% with timber artificial drying to moisture content in the described step 2.
5. prepare the method for heat-treated wood according to claim 1 is described by binary mixture, it is characterized in that: the way of stacking of taking in the described step 3 is the horizontal vertical type stacking of plate face.
6. prepare the method for heat-treated wood according to claim 5 is described by binary mixture, it is characterized in that: the gap that needs to keep 1～10cm between each sheet material.
7. prepare the method for heat-treated wood according to claim 6 is described by binary mixture, it is characterized in that: binary mixture is nitrogen and carbon dioxide in the described step 4, and the volume ratio of its nitrogen and carbon dioxide is 1～6: 2.
8. prepare the method for heat-treated wood according to claim 1 is described by binary mixture, it is characterized in that: heat treatment temperature is 170 ℃ in the described step 5.
9. describedly according to Claim 8 prepare the method for heat-treated wood by binary mixture, it is characterized in that: the heat treatment temperature retention time is 10 hours in the described step 5.
10. prepare the method for heat-treated wood according to claim 1 is described by binary mixture, it is characterized in that: heat treatment temperature need be down to 40 ℃ in the described step 6.
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| CN2013102091640A CN103273546A (en) | 2013-05-30 | 2013-05-30 | Method for preparing heat treatment wood through binary mixed gas |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106573281A (en) * | 2014-10-29 | 2017-04-19 | 威亚特·吉拉尔管理有限公司 | Process for wood torrefaction, and construction material produced therefrom |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000067970A1 (en) * | 1999-05-06 | 2000-11-16 | Slrg Drying Co Pty Ltd | Method and apparatus for drying material |
| CN101664947A (en) * | 2009-09-29 | 2010-03-10 | 东北林业大学 | Production method of carbonized wood |
-
2013
- 2013-05-30 CN CN2013102091640A patent/CN103273546A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000067970A1 (en) * | 1999-05-06 | 2000-11-16 | Slrg Drying Co Pty Ltd | Method and apparatus for drying material |
| CN101664947A (en) * | 2009-09-29 | 2010-03-10 | 东北林业大学 | Production method of carbonized wood |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106573281A (en) * | 2014-10-29 | 2017-04-19 | 威亚特·吉拉尔管理有限公司 | Process for wood torrefaction, and construction material produced therefrom |
| CN106573281B (en) * | 2014-10-29 | 2020-06-16 | 宿州第威木构工程有限公司 | Wood carbonization process and building material produced by same |
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Application publication date: 20130904 |