CN107584607A - A kind of efficiently drop aldehyde method - Google Patents
A kind of efficiently drop aldehyde method Download PDFInfo
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- CN107584607A CN107584607A CN201710918551.XA CN201710918551A CN107584607A CN 107584607 A CN107584607 A CN 107584607A CN 201710918551 A CN201710918551 A CN 201710918551A CN 107584607 A CN107584607 A CN 107584607A
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- Prior art keywords
- aldehyde
- temperature steam
- wood
- formaldehyde
- drop aldehyde
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Abstract
The present invention, which takes, to be constantly passed through with the method for extracting high-temperature steam to drop aldehyde, and because formaldehyde is easily volatile at high temperature and is dissolved in water, therefore the formaldehyde in sheet material largely can be volatilized and be dissolved in steam, then high-temperature steam is reclaimed, so as to reach the purpose of drop aldehyde；It is good suitable for various species, the wood-based plate of various thickness, drop aldehyde effect.Device fabrication difficulty is small, cost is relatively low；When carrying out reducing aldehyde of artificial board processing, operation is easy, and treating capacity is big, and drop aldehyde cost is low.Because using high-temperature steam, touching the moisture of sheet material can evaporate quickly again so that sheet material keeps drying, overcomes in Wood-based Panel Production and is afraid of tide and without using the next convention for directly absorbing formaldehyde of water because afraid of water.
Description
Technical field
It is especially a kind of the present invention relates to a kind of free formaldehyde aldehyde reducing technics of the wood-based plate using urea formaldehyde resin adhesive
Efficiently drop aldehyde method.
Background technology
Reduce artificial board formaldehyde burst size and typically take four kinds of methods：
One, uses the Lauxite of high ureaformaldehyde mol ratio.When synthesizing Lauxite, the urea of raw material is properly increased：Formaldehyde
Mol ratio, the content of free aldehyde of resin and wood-based plate can be reduced to a certain extent.
Two, use formaldehyde catching agent.It is another that these agent for capturing can produce chemical reaction generation with formaldehyde under certain condition
The stable novel substance of kind, or stably absorb formaldehyde.Conventional formaldehyde catching agent has urea, polyvinyl alcohol, melamine, ammonia
Water, toluoyl amine, phenol, hydroquinones, peroxide, bark powder, defatted soy flour, blood meal, flour etc..
Three, improve the mask-making technology of wood-based plate.Select rational mask-making technology, strictly control hot pressing temperature, hot pressing time,
The technical parameters such as the moisture content of resin added and wood-based plate.
Four, carry out post-processing to wood-based plate.Smoked ammonia process is mainly carried out, i.e., artificial board finished product is placed in ammonia atmosphere
In, the free aldehyde allowed in plate is chemically reacted with ammonia, generates inert hexamethylenetetramine (CH2) 6N4.
The shortcomings that many is difficult to overcome be present in above-mentioned the first~tri- kind of method, as physical and mechanical property decline, adhesive into
This raising, storage period shorten, and hot pressing time increases, production capacity reduces etc..
4th kind of method, ammonia treatment is such as smoked using big volume closed chamber normal pressure, drop aldehyde effect is not ideal, and processing time
Long, equipment cost is high, it is difficult to promotes the use of.
The content of the invention
It is an object of the invention to provide that a kind of equipment manufacturing costs are low, drop aldehyde cost is low, technique is simple, effect is good is efficient
Aldehyde method drops, including:
Wood-based plate is put into a closed container, high-temperature steam is persistently filled with to closed container one end, in the closed container other end
Persistently extract high-temperature steam out, open closed container after 5 ~ 10 minutes, wood-based plate is taken out.
Preferably, the pressure in closed container is maintained at 0.2 ~ 0.3MPa.
Preferably, the temperature of the high-temperature steam is 120 ~ 140 DEG C.
Preferably, high-temperature steam is cooled down after extracting high-temperature steam out, and is passed through in ammoniacal liquor.
The present invention, which takes, to be constantly passed through with the method for extracting high-temperature steam to drop aldehyde, because formaldehyde is easily volatile at high temperature
And water is dissolved in, therefore the formaldehyde in sheet material largely can volatilize and be dissolved in steam, then high-temperature steam is reclaimed, so as to reach drop aldehyde
Purpose；It is good suitable for various species, the wood-based plate of various thickness, drop aldehyde effect.Device fabrication difficulty is small, cost is relatively low；
When carrying out reducing aldehyde of artificial board processing, operation is easy, and treating capacity is big, and drop aldehyde cost is low.Due to using high-temperature steam, touching
The moisture of sheet material can evaporate quickly again so that sheet material keep drying, overcome in Wood-based Panel Production because it is afraid of water be afraid of tide and without using
Water directly absorbs the convention of formaldehyde.
Embodiment
Following examples are that the present invention is further described, but should not be construed as any limitation of the invention.
Embodiment 1
By burst size of methanal be 35.0mg/100g (boring method), thickness 18mm, density 690kg/m3 wood-based plate load onto sheet material
Load wagon, it is sent into by guide rail in sealing container, shuts the hermatic door of container, is opened vapour system and be passed through 120 DEG C of high-temperature steams,
Open exhausting system simultaneously constantly to extract high-temperature steam from sealing container out, adjust the flow of vapour system and exhausting system,
The pressure in closed container is maintained at 0.2MPa, open closed container after 5 minutes, wood-based plate is taken out.Sheet material after processing
Free aldehyde burst size is 4.2mg/100g.
Embodiment 2
The wood-based plate that burst size of methanal is 16.7mg/100g (boring method), thickness 15mm, density are 780kg/m3 is loaded onto into plate
Material load wagon, it is sent into by guide rail in sealing container, shuts the hermatic door of container, is opened vapour system and be passed through 140 DEG C of high temperature steamings
Vapour, while open exhausting system and constantly extract high-temperature steam from sealing container out, adjust the stream of vapour system and exhausting system
Amount, makes the pressure in closed container be maintained at 0.3MPa, opens closed container after 10 minutes, wood-based plate is taken out.Handle back plate
The free aldehyde burst size of material is 3.8mg/100g.
In above-mentioned two embodiment, the high-temperature steam of extraction is passed through in ammoniacal liquor after being cooled to room temperature, by formaldehyde therein
Neutralize.
Claims (4)
1. a kind of efficiently drop aldehyde method, including:Wood-based plate is put into a closed container, height is persistently filled with to closed container one end
Warm steam, persistently extract high-temperature steam out in the closed container other end, open closed container after 5 ~ 10 minutes, wood-based plate is taken out.
2. efficiently drop aldehyde method according to claim 1, it is characterised in that:The temperature of the high-temperature steam is 120 ~ 140
℃。
3. efficiently drop aldehyde method according to claim 1, it is characterised in that:Pressure in closed container is maintained at 0.2 ~
0.3MPa。
4. efficiently drop aldehyde method according to claim 1, it is characterised in that:It is after extraction high-temperature steam that high-temperature steam is cold
But, and it is passed through in ammoniacal liquor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710918551.XA CN107584607A (en) | 2017-09-30 | 2017-09-30 | A kind of efficiently drop aldehyde method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710918551.XA CN107584607A (en) | 2017-09-30 | 2017-09-30 | A kind of efficiently drop aldehyde method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107584607A true CN107584607A (en) | 2018-01-16 |
Family
ID=61052716
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710918551.XA Pending CN107584607A (en) | 2017-09-30 | 2017-09-30 | A kind of efficiently drop aldehyde method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107584607A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111438781A (en) * | 2020-04-29 | 2020-07-24 | 成都市美康三杉木业有限公司 | Aldehyde-reducing heat treatment process and continuous energy-saving aldehyde-reducing heat treatment kiln |
| CN115674371A (en) * | 2022-09-20 | 2023-02-03 | 贺州市恒轩木业有限公司 | Preparation method of low-formaldehyde environment-friendly plywood and low-formaldehyde environment-friendly plywood |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1184328A (en) * | 1982-05-06 | 1985-03-19 | William R. Allen, Sr. | Preservation of wood |
| CN101108498A (en) * | 2007-08-20 | 2008-01-23 | 魏根成 | Technique of reducing aldehyde of artificial board |
| CN102848435A (en) * | 2011-06-28 | 2013-01-02 | 上海市向明中学 | Method for effectively removing furniture formaldehyde pollution |
| CN105126559A (en) * | 2015-07-13 | 2015-12-09 | 甘肃德福生物科技有限公司 | Concentrated high-strength indoor formaldehyde purifying method |
-
2017
- 2017-09-30 CN CN201710918551.XA patent/CN107584607A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1184328A (en) * | 1982-05-06 | 1985-03-19 | William R. Allen, Sr. | Preservation of wood |
| CN101108498A (en) * | 2007-08-20 | 2008-01-23 | 魏根成 | Technique of reducing aldehyde of artificial board |
| CN102848435A (en) * | 2011-06-28 | 2013-01-02 | 上海市向明中学 | Method for effectively removing furniture formaldehyde pollution |
| CN105126559A (en) * | 2015-07-13 | 2015-12-09 | 甘肃德福生物科技有限公司 | Concentrated high-strength indoor formaldehyde purifying method |
Non-Patent Citations (1)
| Title |
|---|
| 余先纯等: "《木材胶黏剂与胶合技术》", 31 March 2011, 北京：中国轻工业出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111438781A (en) * | 2020-04-29 | 2020-07-24 | 成都市美康三杉木业有限公司 | Aldehyde-reducing heat treatment process and continuous energy-saving aldehyde-reducing heat treatment kiln |
| CN115674371A (en) * | 2022-09-20 | 2023-02-03 | 贺州市恒轩木业有限公司 | Preparation method of low-formaldehyde environment-friendly plywood and low-formaldehyde environment-friendly plywood |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180116 |