CN114800748A - Method for making carbonized wood and application - Google Patents
Method for making carbonized wood and application Download PDFInfo
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- CN114800748A CN114800748A CN202210544756.7A CN202210544756A CN114800748A CN 114800748 A CN114800748 A CN 114800748A CN 202210544756 A CN202210544756 A CN 202210544756A CN 114800748 A CN114800748 A CN 114800748A
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- 239000002023 wood Substances 0.000 title claims abstract description 123
- 238000000034 method Methods 0.000 title claims abstract description 33
- 238000003763 carbonization Methods 0.000 claims abstract description 83
- 238000001035 drying Methods 0.000 claims abstract description 47
- 238000004519 manufacturing process Methods 0.000 claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 75
- 238000001816 cooling Methods 0.000 claims description 34
- 238000010438 heat treatment Methods 0.000 claims description 24
- 238000004806 packaging method and process Methods 0.000 claims description 14
- 238000005507 spraying Methods 0.000 claims description 14
- 238000011084 recovery Methods 0.000 claims description 12
- 238000005452 bending Methods 0.000 claims description 7
- 238000010000 carbonizing Methods 0.000 claims description 7
- 238000010422 painting Methods 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 7
- 239000007921 spray Substances 0.000 claims description 7
- 238000003860 storage Methods 0.000 claims description 7
- 238000005520 cutting process Methods 0.000 claims description 6
- 230000009467 reduction Effects 0.000 claims description 3
- 239000011121 hardwood Substances 0.000 claims 1
- 230000004048 modification Effects 0.000 abstract description 4
- 238000012986 modification Methods 0.000 abstract description 4
- 238000012545 processing Methods 0.000 abstract description 3
- 238000012856 packing Methods 0.000 abstract 1
- 230000008569 process Effects 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 3
- 241000238631 Hexapoda Species 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229920002488 Hemicellulose Polymers 0.000 description 1
- 241001465754 Metazoa Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000007373 indentation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
- 239000010875 treated wood Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27M—WORKING OF WOOD NOT PROVIDED FOR IN SUBCLASSES B27B - B27L; MANUFACTURE OF SPECIFIC WOODEN ARTICLES
- B27M1/00—Working of wood not provided for in subclasses B27B - B27L, e.g. by stretching
- B27M1/06—Working of wood not provided for in subclasses B27B - B27L, e.g. by stretching by burning or charring, e.g. cutting with hot wire
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K1/00—Damping wood
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27M—WORKING OF WOOD NOT PROVIDED FOR IN SUBCLASSES B27B - B27L; MANUFACTURE OF SPECIFIC WOODEN ARTICLES
- B27M3/00—Manufacture or reconditioning of specific semi-finished or finished articles
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Chemical And Physical Treatments For Wood And The Like (AREA)
Abstract
(1) The invention relates to the technical field of wood product modification processing, in particular to a method for manufacturing carbonized wood and application thereof, which comprises (1) stock warehousing of a blank, (2) drying of the blank, (3) carbonization treatment, (4) carbonized wood treatment and (5) packing and warehousing.
Description
Technical Field
The invention relates to the technical field of wood product modification processing, in particular to a method for manufacturing carbonized wood and application thereof.
Background
The fast-growing forest wood is a recyclable engineering material, and the abundant fast-growing forest wood resources in China are utilized to develop environment-friendly and recyclable wood, so that the method has great social significance for energy conservation and emission reduction, and construction of resource-saving and environment-friendly economic cycle systems. The carbonized wood is wood treated by a high-temperature carbonization technology, has better corrosion and insect prevention functions because the nutrient components are damaged, has better physical properties because the hemicellulose of the water-absorbing functional group is recombined, is a real environment-friendly product, does not contain any harmful substance although having corrosion and insect prevention properties, not only prolongs the service life of the wood, but also does not have any negative influence on human bodies, animals and environment in the production process and after the waste treatment. Deeply carbonized wood has nearly ten years of experience in europe and is the primary replacement product after CCA-prohibited preservation of wood. Because the wood carbonization treatment process is still in a research stage, the quality of the wood treated by the existing process is unstable, the quality problem of deformation is easy to generate, the carbonization treatment period is long, and the production cost is greatly improved, the existing process technology is urgently needed to be improved on the basis of the original process, so that the quality of carbonized wood products is ensured, and the outturn percentage of the wood is improved.
Chinese patent document CN102922580B discloses a 'method for manufacturing a carbonization heat treatment improved solid wood floor', the invention patent comprises the following steps: directly conveying the dried wood in a drying kiln into a carbonization heat treatment kiln by using a forklift, closing a heat treatment kiln door, simultaneously opening heating and humidifying valves, quickly heating and humidifying the wood, directly raising the temperature to 185-210 ℃ to carry out heat treatment improvement on the wood for 2-4h, closing the heating after the end, quickly reducing the temperature of the wood to 120-125 ℃ in heat treatment equipment by adopting a water spraying and atomizing method, ending atomizing water and stopping humidifying, and naturally cooling to 40-60 ℃ in the kiln to take the wood out of the kiln. The scheme still has the problem of low product quality and low outturn rate in production time.
Disclosure of Invention
The invention aims to overcome the technical defects in the prior art and provides a method for making carbonized wood and application thereof.
In order to achieve the purpose, the invention provides a method for manufacturing carbonized wood and application thereof, which comprises the following steps:
(1) warehousing the blank: selecting qualified timber of a supplier to be put in storage and sawn into sawn timber with the thickness of 19-24 mm;
(2) blank drying: detecting the water content of the blanks, picking out a first blank with the water content lower than 8% for waiting treatment, and drying a second blank with the water content higher than 8% to enable the water content to be lower than 8%;
(3) and (3) carbonization treatment: placing the first blank and the dried second blank in a carbonization heat treatment kiln for carbonization heat treatment to obtain carbonized wood;
(4) carbonizing wood: performing side bending and flat planing and four-side planing on the carbonized wood obtained in the step (3) to obtain carbonized wood with a smooth surface, and then repairing and sanding the cut carbonized wood;
(5) packaging and warehousing: and (5) painting the surface of the carbonized wood treated in the step (4), packaging and warehousing.
Preferably, the blank drying method in the step (2) is as follows: and adjusting the temperature of the drying kiln to be 85-90 ℃, placing the second blank into the drying kiln for 12-16h, adjusting the temperature of the drying kiln to be 50-55 ℃, preserving heat for 10-12h, naturally cooling, and detecting the water content of the second blank until the water content is lower than 8%.
Preferably, the carbonization treatment step comprises stacking the first blank and the second blank, pushing the first blank and the second blank into a carbonization treatment kiln, sealing a kiln door, closing each air hole of the carbonization treatment kiln, keeping the temperature in the kiln at 185-plus-210 ℃, discontinuously spraying water vapor into the kiln, keeping the relative humidity in the kiln at 100%, continuously treating for 100-plus-300 min, and then carrying out cooling treatment.
Further preferably, the temperature rise speed of the carbonization treatment is 9-12 ℃/h, water vapor is continuously sprayed into the kiln during temperature rise, so that the relative humidity in the kiln is kept at 100%, but the temperature in the kiln is kept for 2-4h when the temperature in the kiln is raised to 120 ℃, and then is gradually raised to 185-210 ℃.
Further preferably, the temperature reduction step of the carbonization treatment is as follows: and opening each air hole of the carbonization treatment kiln to cool the interior of the kiln and spray steam, wherein the cooling speed is 12-15 ℃/h, when the temperature in the kiln is reduced to 50 ℃, stopping spraying the steam, completely opening the kiln, and naturally cooling.
Further preferably, the carbonization treatment further comprises a water rate recovery step: and (4) transferring the wood obtained by the carbonization treatment into a drying kiln for recovering the water content to 7-11%.
Further preferably, the water rate recovery step may be: and placing the carbonized wood in a cool and humid environment for stacking for 6-10 days to ensure that the wood absorbs moisture uniformly and stably until the moisture content is 7-11%.
The invention also provides an application of the carbonized wood in fast growing wood and hard broad-leaved wood.
Through the technical scheme, the carbonized wood prepared by the invention has the following excellent effects:
1. on the basis of the original carbonization treatment process, the invention adopts a transient stepwise temperature rise method, can prevent the defects of the wood in the treatment process, can prevent the influence of color change caused by the indentation of the parting strip in the drying and carbonization heat treatment process on the surface quality of the floor, and does not influence the drying and carbonization heat treatment quality, and the treated wood has good quality and higher wood yield.
2. The invention can carry out moisture adjustment and moisture regain treatment on the carbonized wood, can quickly and effectively moisten the over-dried board, and can adjust the moisture content of the board back to 7-11%, so as to be beneficial to the smooth implementation of the subsequent processing process.
3. The carbonization treatment of the invention has no chemical pollution, short carbonization treatment period, reduced production cost, high efficiency, energy saving and the like.
4. And in the cooling stage after the carbonization treatment, the cooling speed of the wood is accelerated by adopting a method of spraying the atomized water, so that the production period can be shortened, the utilization rate of equipment can be improved, and the stress formed in the dried and carbonized plate can be obviously eliminated in the process.
Detailed Description
The endpoints of the ranges and any values disclosed herein are not limited to the precise range or value, and such ranges or values should be understood to encompass values close to those ranges or values. For ranges of values, between the endpoints of each of the ranges and the individual points, and between the individual points may be combined with each other to give one or more new ranges of values, and these ranges of values should be considered as specifically disclosed herein.
The invention provides a method for manufacturing carbonized wood, which comprises the following steps:
(1) warehousing the blank: selecting qualified timber of a supplier to be put in storage and sawn into sawn timber with the thickness of 19-24 mm;
(2) blank drying: detecting the water content of the blanks, picking out a first blank with the water content lower than 8% for waiting treatment, and drying a second blank with the water content higher than 8% to enable the water content to be lower than 8%;
(3) and (3) carbonization treatment: placing the first blank and the dried second blank in a carbonization heat treatment kiln for carbonization heat treatment to obtain carbonized wood;
(4) carbonizing wood: performing side-bending flat planing and four-side planing on the carbonized wood obtained in the step (3) to obtain carbonized wood with a smooth surface, and then repairing and sanding the carbonized wood after cutting off the carbonized wood;
(5) packaging and warehousing: and (5) painting the surface of the carbonized wood treated in the step (4), packaging and warehousing.
In the invention, the method for drying the blank in the step (2) comprises the following steps: and adjusting the temperature of the drying kiln to 85-90 ℃, placing the second blank into the drying kiln for 12-16h, adjusting the temperature of the drying kiln to 50-55 ℃, preserving the heat for 10-12h, naturally cooling, and detecting the water content of the second blank until the water content is lower than 8%.
In the invention, the carbonization treatment step comprises stacking the first blank and the second blank, pushing the first blank and the second blank into a carbonization treatment kiln, sealing a kiln door, closing each air hole of the carbonization treatment kiln, keeping the temperature in the kiln at 185-plus-210 ℃, discontinuously spraying water vapor into the kiln to keep the relative humidity in the kiln at 100%, continuously treating for 100-plus-300 min, and then cooling.
Further, the temperature rise speed of the carbonization treatment is 9-12 ℃/h, water vapor is continuously sprayed into the kiln during temperature rise, so that the relative humidity in the kiln is kept at 100%, but the temperature in the kiln is kept for 2-4h when being raised to 120 ℃, and then is gradually raised to 185-210 ℃.
Further, the cooling step of the carbonization treatment comprises the following steps: and opening each air hole of the carbonization treatment kiln to cool the interior of the kiln and spray steam, wherein the cooling speed is 12-15 ℃/h, when the temperature in the kiln is reduced to 50 ℃, stopping spraying the steam, completely opening the kiln, and naturally cooling.
Further, the carbonization treatment also comprises a water rate recovery step: and (4) transferring the wood obtained by the carbonization treatment into a drying kiln for recovering the water content to 7-11%.
Further, the water rate recovery step may be: and placing the carbonized wood in a cool and humid environment for stacking for 6-10 days to ensure that the wood absorbs moisture uniformly and stably until the moisture content is 7-11%.
The invention also provides an application of the carbonized wood in fast growing wood and hard broad-leaved wood.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1:
the invention provides a method for manufacturing carbonized wood, which comprises the following steps:
(1) warehousing the blank: selecting qualified timber of a supplier to be put in storage and sawn into sawn timber with the thickness of 19-24 mm;
(2) blank drying: detecting the water content of the blanks, picking out a first blank with the water content lower than 8% for waiting treatment, and drying a second blank with the water content higher than 8% to enable the water content to be lower than 8%;
(3) and (3) carbonization treatment: placing the first blank and the dried second blank in a carbonization heat treatment kiln for carbonization heat treatment to obtain carbonized wood;
(4) carbonizing wood: performing side-bending flat planing and four-side planing on the carbonized wood obtained in the step (3) to obtain carbonized wood with a smooth surface, and then repairing and sanding the carbonized wood after cutting off the carbonized wood;
(5) packaging and warehousing: and (5) painting the surface of the carbonized wood treated in the step (4), packaging and warehousing.
And adjusting the temperature of the drying kiln to 85 ℃, placing the second blank into the drying kiln for 12 hours, adjusting the temperature of the drying kiln to 50 ℃, preserving the heat for 10 hours, naturally cooling, and detecting the water content of the second blank until the water content is lower than 8%.
The carbonization treatment steps are as follows: pushing the wood into a carbonization treatment kiln, sealing a kiln door, closing each air hole of the carbonization treatment kiln, keeping the temperature in the kiln at 185 ℃, discontinuously spraying water vapor into the kiln to keep the relative humidity in the kiln at 100%, continuously treating for 100min, and then cooling.
Wherein the temperature rise speed of the carbonization treatment is 9 ℃/h, water vapor is continuously sprayed into the kiln during the temperature rise, so that the relative humidity in the kiln is kept at 100 percent, but the temperature in the kiln is kept for 2h when being raised to 120 ℃, and then is gradually raised to 185 ℃.
The cooling step is as follows: and opening each air hole of the carbonization treatment kiln to cool the interior of the kiln and spray steam, wherein the cooling speed is 12 ℃/h, stopping spraying the steam when the temperature in the kiln is reduced to 50 ℃, completely opening the kiln, and naturally cooling.
And the subsequent carbonization treatment water rate recovery step is to transfer the wood obtained by carbonization treatment into a drying kiln for water rate recovery so as to recover the water rate to 7-11%.
The subsequent carbonization treatment water rate recovery steps are as follows: and placing the carbonized wood in a cool and humid environment for stacking for 6 days to ensure that the wood absorbs moisture uniformly and stably until the moisture content is 7-11 percent.
Example 2
The invention provides a method for manufacturing carbonized wood, which comprises the following steps:
(1) warehousing the blank: selecting qualified timber of a supplier to be put in storage and sawn into sawn timber with the thickness of 19-24 mm;
(2) blank drying: detecting the water content of the blanks, picking out a first blank with the water content lower than 8% for waiting treatment, and drying a second blank with the water content higher than 8% to enable the water content to be lower than 8%;
(3) and (3) carbonization treatment: placing the first blank and the dried second blank in a carbonization heat treatment kiln for carbonization heat treatment to obtain carbonized wood;
(4) carbonizing wood: performing side-bending flat planing and four-side planing on the carbonized wood obtained in the step (3) to obtain carbonized wood with a smooth surface, and then repairing and sanding the carbonized wood after cutting off the carbonized wood;
(5) packaging and warehousing: and (5) painting the surface of the carbonized wood treated in the step (4), packaging and warehousing.
And adjusting the temperature of the drying kiln to be between 90 ℃, placing the second blank into the drying kiln for 16 hours, adjusting the temperature of the drying kiln to be 55 ℃, preserving the heat for 12 hours, naturally cooling, and detecting the water content of the second blank until the water content is lower than 8%.
The carbonization treatment steps are as follows: pushing the wood into a carbonization treatment kiln, sealing a kiln door, closing each air hole of the carbonization treatment kiln, keeping the temperature in the kiln at 210 ℃, discontinuously spraying water vapor into the kiln to keep the relative humidity in the kiln at 100%, continuously treating for 300min, and then cooling.
Wherein the temperature rise speed of the carbonization treatment is 12 ℃/h, water vapor is continuously sprayed into the kiln during the temperature rise, so that the relative humidity in the kiln is kept at 100 percent, but the temperature in the kiln is kept for 4h when being raised to 120 ℃, and then is gradually raised to 210 ℃.
The cooling step is as follows: and opening each air hole of the carbonization treatment kiln to cool the interior of the kiln and spray steam, wherein the cooling speed is 15 ℃/h, when the temperature in the kiln is reduced to 50 ℃, stopping spraying the steam, completely opening the kiln, and naturally cooling.
The subsequent water rate recovery step comprises transferring the wood obtained by carbonization treatment into a drying kiln for recovering the water content to 7-11%
Example 3
The invention provides a method for manufacturing carbonized wood, which comprises the following steps:
(1) warehousing the blank: selecting qualified timber of a supplier to be put in storage and sawn into sawn timber with the thickness of 19-24 mm;
(2) blank drying: detecting the water content of the blanks, picking out a first blank with the water content lower than 8% for waiting treatment, and drying a second blank with the water content higher than 8% to enable the water content to be lower than 8%;
(3) and (3) carbonization treatment: placing the first blank and the dried second blank in a carbonization heat treatment kiln for carbonization heat treatment to obtain carbonized wood;
(4) carbonizing wood: performing side-bending flat planing and four-side planing on the carbonized wood obtained in the step (3) to obtain carbonized wood with a smooth surface, and then repairing and sanding the carbonized wood after cutting off the carbonized wood;
(5) packaging and warehousing: and (5) painting the surface of the carbonized wood treated in the step (4), packaging and warehousing.
And adjusting the temperature of the drying kiln to 85 ℃, placing the second blank into the drying kiln for 12 hours, adjusting the temperature of the drying kiln to 50 ℃, preserving the heat for 10 hours, naturally cooling, and detecting the water content of the second blank until the water content is lower than 8%.
The carbonization treatment steps are as follows: pushing the wood into a carbonization treatment kiln, sealing a kiln door, closing each air hole of the carbonization treatment kiln, keeping the temperature in the kiln at 185 ℃, discontinuously spraying water vapor into the kiln to keep the relative humidity in the kiln at 100%, continuously treating for 100min, and then cooling.
Wherein the temperature rise speed of the carbonization treatment is 9 ℃/h, water vapor is continuously sprayed into the kiln during the temperature rise, so that the relative humidity in the kiln is kept at 100 percent, but the temperature in the kiln is kept for 2h when being raised to 120 ℃, and then is gradually raised to 185 ℃.
The cooling step is as follows: and opening each air hole of the carbonization treatment kiln to cool the interior of the kiln and spray steam, wherein the cooling speed is 12 ℃/h, stopping spraying the steam when the temperature in the kiln is reduced to 50 ℃, completely opening the kiln, and naturally cooling.
The subsequent carbonization treatment water rate recovery steps are as follows: and placing the carbonized wood in a cool and humid environment for stacking for 10 days to ensure that the wood absorbs moisture uniformly and stably until the moisture content is 7-11 percent.
Comparative example 1
The invention provides a method for manufacturing carbonized wood, which comprises the following steps:
(1) warehousing the blank: selecting qualified timber of a supplier to be put in storage and sawn into sawn timber with the thickness of 19-24 mm;
(2) blank drying: detecting the water content of the blanks, picking out the first blanks with the water content lower than 8% for waiting treatment, and drying the second blanks with the water content higher than 8% to enable the water content to be lower than 8%;
(3) and (3) carbonization treatment: placing the first blank and the dried second blank in a carbonization heat treatment kiln for carbonization heat treatment to obtain carbonized wood;
(4) carbonizing wood: performing side-bending flat planing and four-side planing on the carbonized wood obtained in the step (3) to obtain carbonized wood with a smooth surface, and then repairing and sanding the carbonized wood after cutting off the carbonized wood;
(5) packaging and warehousing: and (5) painting the surface of the carbonized wood treated in the step (4), packaging and warehousing.
And adjusting the temperature of the drying kiln to 85 ℃, placing the second blank into the drying kiln for 12 hours, adjusting the temperature of the drying kiln to 50 ℃, preserving the heat for 10 hours, naturally cooling, and detecting the water content of the second blank until the water content is lower than 8%.
The carbonization treatment steps are as follows: pushing the wood into a carbonization treatment kiln, sealing a kiln door, closing each air hole of the carbonization treatment kiln, keeping the temperature in the kiln at 185 ℃, discontinuously spraying water vapor into the kiln to keep the relative humidity in the kiln at 100%, continuously treating for 100min, and then cooling.
Wherein the temperature rise speed of the carbonization treatment is 9 ℃/h, and water vapor is continuously sprayed into the kiln during the temperature rise, so that the relative humidity in the kiln is kept at 100 percent and gradually rises to 185 ℃.
The cooling step is as follows: and opening each air hole of the carbonization treatment kiln to cool the interior of the kiln and spray steam, and naturally cooling.
The subsequent carbonization treatment water rate recovery steps are as follows: and placing the carbonized wood in a cool and humid environment for stacking for 10 days to ensure that the wood absorbs moisture uniformly and stably until the moisture content is 7-11 percent.
The carbonized wood obtained by the manufacturing methods of examples 1 to 3 and comparative example 1 was tested, wherein the carbonized wood obtained by examples 1 to 3 had better performance and better integrity than the carbonized wood obtained by comparative example 1.
The preferred embodiments of the present invention have been described above in detail, but the present invention is not limited thereto. Within the scope of the technical idea of the invention, many simple modifications can be made to the technical solution of the invention, including combinations of various technical features in any other suitable way, and these simple modifications and combinations should also be regarded as the disclosure of the invention, and all fall within the scope of the invention.
Claims (8)
1. A method for producing carbonized wood, characterized by comprising the steps of:
(1) warehousing the blank: selecting qualified timber of a supplier to be put in storage and sawn into sawn timber with the thickness of 19-24 mm;
(2) blank drying: detecting the water content of the blanks, picking out a first blank with the water content lower than 8% for waiting treatment, and drying a second blank with the water content higher than 8% to enable the water content to be lower than 8%;
(3) and (3) carbonization treatment: placing the first blank and the dried second blank in a carbonization heat treatment kiln for carbonization heat treatment to obtain carbonized wood;
(4) carbonizing wood: performing side-bending flat planing and four-side planing on the carbonized wood obtained in the step (3) to obtain carbonized wood with a smooth surface, and then repairing and sanding the carbonized wood after cutting off the carbonized wood;
(5) packaging and warehousing: and (5) painting the surface of the carbonized wood treated in the step (4), packaging and warehousing.
2. A method for making carbonized wood according to claim 1, wherein the drying of the blank in the step (2) is performed by: and adjusting the temperature of the drying kiln to 85-90 ℃, placing the second blank into the drying kiln for 12-16h, adjusting the temperature of the drying kiln to 50-55 ℃, preserving the heat for 10-12h, naturally cooling, and detecting the water content of the second blank until the water content is lower than 8%.
3. The method for manufacturing carbonized wood as claimed in claim 1, wherein the carbonization step comprises stacking the first and second blanks, pushing them into a carbonization kiln, sealing the kiln door, closing each air hole of the carbonization kiln, keeping the temperature in the kiln at 185-.
4. The method as claimed in claim 3, wherein the temperature of the carbonization treatment is raised at a rate of 9-12 ℃/h, and water vapor is continuously blown into the kiln during the temperature raising, so that the relative humidity in the kiln is maintained at 100%, but the temperature in the kiln is maintained at 120 ℃ for 2-4h, and then gradually raised to 185-210 ℃.
5. A method for making carbonized wood according to claim 3, wherein the temperature reduction step of the carbonization treatment comprises: and opening each air hole of the carbonization treatment kiln to cool the interior of the kiln and spray steam, wherein the cooling speed is 12-15 ℃/h, when the temperature in the kiln is reduced to 50 ℃, stopping spraying the steam, completely opening the kiln, and naturally cooling.
6. A method of producing carbonized wood as claimed in claim 3, wherein said carbonization treatment further comprises a water recovery step of: and (4) transferring the wood obtained by the carbonization treatment into a drying kiln for recovering the water content to 7-11%.
7. A method of producing carbonized wood according to claim 6, wherein the water recovery step further comprises: and placing the carbonized wood in a cool and humid environment for stacking for 6-10 days to ensure that the wood absorbs moisture uniformly and stably until the moisture content is 7-11%.
8. A method of making carbonized wood according to any of the claims 1-7, characterized in that the method is applied to fast growing wood and hard hardwood.
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| CN202210544756.7A CN114800748A (en) | 2022-05-19 | 2022-05-19 | Method for making carbonized wood and application |
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| CN1868708A (en) * | 2006-06-27 | 2006-11-29 | 浙江世友木业有限公司 | Production method of carbonizing wood floor board |
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