CN1329171C - Method and device for removing free formaldehyde in artificial board - Google Patents
Method and device for removing free formaldehyde in artificial board Download PDFInfo
- Publication number
- CN1329171C CN1329171C CNB2005101158687A CN200510115868A CN1329171C CN 1329171 C CN1329171 C CN 1329171C CN B2005101158687 A CNB2005101158687 A CN B2005101158687A CN 200510115868 A CN200510115868 A CN 200510115868A CN 1329171 C CN1329171 C CN 1329171C
- Authority
- CN
- China
- Prior art keywords
- treatment box
- artificial board
- free formaldehyde
- described treatment
- ozone
- Prior art date
- 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.)
- Expired - Fee Related
Links
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 title claims abstract description 297
- 238000000034 method Methods 0.000 title claims abstract description 50
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims abstract description 51
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 25
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims abstract description 15
- 238000005507 spraying Methods 0.000 claims abstract description 5
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims abstract description 3
- 239000002023 wood Substances 0.000 claims description 53
- 230000008569 process Effects 0.000 claims description 20
- 238000012545 processing Methods 0.000 claims description 20
- 239000000463 material Substances 0.000 claims description 18
- -1 oxygen free radical Chemical class 0.000 claims description 17
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 239000007789 gas Substances 0.000 claims description 5
- 239000001301 oxygen Substances 0.000 claims description 4
- 229910052760 oxygen Inorganic materials 0.000 claims description 4
- 238000009281 ultraviolet germicidal irradiation Methods 0.000 claims description 4
- 239000001569 carbon dioxide Substances 0.000 claims description 3
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 3
- VUZPPFZMUPKLLV-UHFFFAOYSA-N methane;hydrate Chemical compound C.O VUZPPFZMUPKLLV-UHFFFAOYSA-N 0.000 claims description 3
- 230000035515 penetration Effects 0.000 claims description 2
- 239000011148 porous material Substances 0.000 claims description 2
- 238000009736 wetting Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 9
- 230000001105 regulatory effect Effects 0.000 abstract description 2
- 235000019256 formaldehyde Nutrition 0.000 description 83
- 238000012360 testing method Methods 0.000 description 18
- 229920005989 resin Polymers 0.000 description 11
- 239000011347 resin Substances 0.000 description 11
- 230000000694 effects Effects 0.000 description 10
- 238000007731 hot pressing Methods 0.000 description 9
- 239000003795 chemical substances by application Substances 0.000 description 6
- 238000001816 cooling Methods 0.000 description 6
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 5
- 239000004202 carbamide Substances 0.000 description 5
- 230000008859 change Effects 0.000 description 5
- 239000003292 glue Substances 0.000 description 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 238000009423 ventilation Methods 0.000 description 4
- 239000000047 product Substances 0.000 description 3
- 206010019233 Headaches Diseases 0.000 description 2
- 241000351396 Picea asperata Species 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 235000019270 ammonium chloride Nutrition 0.000 description 2
- 235000011114 ammonium hydroxide Nutrition 0.000 description 2
- 239000003814 drug Substances 0.000 description 2
- 230000008030 elimination Effects 0.000 description 2
- 238000003379 elimination reaction Methods 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 231100000869 headache Toxicity 0.000 description 2
- 238000005286 illumination Methods 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- LSNNMFCWUKXFEE-UHFFFAOYSA-L sulfite Chemical compound [O-]S([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-L 0.000 description 2
- 208000024891 symptom Diseases 0.000 description 2
- 235000018185 Betula X alpestris Nutrition 0.000 description 1
- 235000018212 Betula X uliginosa Nutrition 0.000 description 1
- 201000004624 Dermatitis Diseases 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 102000004190 Enzymes Human genes 0.000 description 1
- 108090000790 Enzymes Proteins 0.000 description 1
- 240000000731 Fagus sylvatica Species 0.000 description 1
- 235000010099 Fagus sylvatica Nutrition 0.000 description 1
- 206010020565 Hyperaemia Diseases 0.000 description 1
- 229920000877 Melamine resin Polymers 0.000 description 1
- 239000004640 Melamine resin Substances 0.000 description 1
- 206010030113 Oedema Diseases 0.000 description 1
- 208000002193 Pain Diseases 0.000 description 1
- 241000218657 Picea Species 0.000 description 1
- 235000008331 Pinus X rigitaeda Nutrition 0.000 description 1
- 235000011613 Pinus brutia Nutrition 0.000 description 1
- 241000018646 Pinus brutia Species 0.000 description 1
- 208000013738 Sleep Initiation and Maintenance disease Diseases 0.000 description 1
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 1
- 229920001807 Urea-formaldehyde Polymers 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 238000009303 advanced oxidation process reaction Methods 0.000 description 1
- 238000004887 air purification Methods 0.000 description 1
- GZCGUPFRVQAUEE-SLPGGIOYSA-N aldehydo-D-glucose Chemical compound OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C=O GZCGUPFRVQAUEE-SLPGGIOYSA-N 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000000975 bioactive effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 231100000749 chronicity Toxicity 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000034994 death Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000003599 detergent Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 208000035475 disorder Diseases 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000007429 general method Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 206010022437 insomnia Diseases 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 230000000622 irritating effect Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000017074 necrotic cell death Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 235000010204 pine bark Nutrition 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 230000007096 poisonous effect Effects 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 102000004169 proteins and genes Human genes 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 210000002345 respiratory system Anatomy 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000000638 stimulation Effects 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Landscapes
- Chemical And Physical Treatments For Wood And The Like (AREA)
Abstract
The present invention relates to a method and a device for eliminating free formaldehyde in an artificial board. The method of the present invention comprises the following steps that (1)ozone is led into water or water containing 5 to 10% of hydrogen peroxide, the ozone generating quantity of an ozonizer, which is matched with each kilogram of solutions is larger than 1000 mg/h, and leading time is 10 minutes at least; (2) the prepared solutions are sprayed to the surface of the artificial board, and average spraying density is from 10 to 30 g/m<2>; (3) the artificial board is put into a closed treatment box for generating the ozone continuously, and when the ozone quantity is small, the generating quantity is averaged to a level that a headroom volume in the treatment box is 1 g/h. m<3> at least; (4) the surface of the artificial board is irradiated by ultraviolet light with the step (3) simultaneously, and the total power of an ultraviolet lamp averaged to the area of the processed artificial board is 1 W/m<2> at least. The present invention can control the generating quantity of hydroxy free radicals (.OH) by regulating the generating quantity of the ozone or the irradiation number of the ultraviolet lamp, and can regulate the purifying capacity of the device conveniently. The device of the present invention has the advantages of simple structure, convenient manufacture and capacity of realizing the method of the present invention effectively.
Description
Technical field
The present invention relates to a kind of method of eliminating formaldehyde, particularly about a kind of method and device of eliminating free formaldehyde in artificial board.
Background technology
In the interior decoration process, can produce multiple pollutant inevitably, what wherein pollution was the most serious is exactly formaldehyde.Formaldehyde is irritative gas colourless, that have overpowering odor, and proportion is slightly larger than air, and is soluble in water, is a kind of VOC.Formaldehyde is the magma poisonous substance, can and combined with protein, suck high-concentration formaldehyde and can cause symptoms such as the serious stimulation of respiratory tract and oedema, eye shouting pain, headache, bronchial astehma.Skin directly contacts formaldehyde, can cause dermatitis, color spot, necrosis.Long-term contact formaldehyde mucous hyperemia, headache can occur, feels sick, a series of symptom such as insomnia, vegetative nervous disorder even cause rhinocarcinoma.If air formaldehyde concentration reaches 30mg/m
3The time in addition the people is caused death.
The origin cause of formation and rule that artificial board formaldehyde pollutes are as follows: 1, the material about 90% of wood-based plate is a timber, and itself distributes formaldehyde timber.Make glued board with veneer, make particieboard and medium density fibre board (MDF) with wood shavings and fiber, all need timber analysed and and separate and experience dryly, this just makes formaldehyde of timber itself generation overflow to the external world.Under identical working condition, the burst size of methanal of Oak Tree particieboard is starkly lower than the pine particieboard.The birch particieboard is higher by 20% than the burst size of methanal of dragon spruce particieboard, and the dragon spruce plate is higher by 10% than the burst size of methanal of oak plate.The particieboard that contains a large amount of barks, its burst size of methanal is lower.The particieboard of spruce bark and pine bark, burst size of methanal are lower than beech bark particieboard.The ratio that big and flat wood shavings account in the particieboard is big more, and the burst size of methanal of particieboard is just low more.Under the same conditions, the formaldehyde amount of sawdust plate release exceeds 10 times than the planing particieboard.In addition, the wooden moisture content of sheet material is high more, and the sheet material burst size of methanal is big more.2, wood-based plate is wanted applying glue in manufacture process, and the free shape formaldehyde of the reaction of having neither part nor lot in is arranged in the adhesive.Glue commonly used at present is Lauxite and melamine resin adehsive, and these glue owing to the prescription difference or the adhesive-preparing technology difference that are adopted, contain a certain amount of free formaldehyde (being controlled at about 1.5% usually) in the resin glue that causes making when producing.The mol ratio of formaldehyde and urea (F/U) is big more in the resin, and free formaldehyde content is high more.Wood-based plate resin added in manufacture process is big more, and formaldehyde discharges many more.Under the identical situation of other condition, when resin added raising 5%, the burst size of methanal of sheet material will increase by 20%.3, to pass through hot pressing in the sheet material manufacture process, solidify generation formaldehyde during hot pressing fully.Make the resin glue of linear structure become network structure, i.e. curing reaction.But because in the process of slab pressurization, usually exist the thermograde that from the surface to the sandwich layer, progressively reduces in the slab thickness direction, make this process be difficult to usually carry out fully, cause slab inside, especially sandwich layer, the linear structure resin that exists some that curing reaction does not take place is easy to decomposite formaldehyde and distributes to the external world.The burst size of methanal of wood-based plate reduces with the consumption increase of curing agent (ammonium chloride), does not use the plank of curing agent compacting, its burst size of methanal maximum.But because the restriction of curing rate, the addition of ammonium chloride can not be too much in the production.Add ammoniacal liquor and urea in the curing component, also can reduce burst size of methanal, can slow down curing rate but too much add ammoniacal liquor.As for urea, only can be used for free formaldehyde and surpass 0.4% resin, be lower than 0.4% resin for free formaldehyde, use urea can increase the expansion rate of particieboard.Hot pressing temperature is high more in the sheet material manufacture process, and hot pressing time is long more, and the formaldehyde that sheet material discharges when hot pressing is many more, and finished product sheet material burst size of methanal is low more.4, the wood-based plate finished product is stacked generally stacking immediately after hot press comes out, the cooling back is stacked and forced to cool off the back and stack three kinds of stacking methods naturally.Evidence, the sheet material that stack the cooling back is compared with the sheet material of directly stacking without cooling, and burst size of methanal reduces by 44%, and stack than the sheet material of forcing the cooling back to be stacked the cooling back naturally, burst size of methanal reduces 5%.When being cooled to 60～70 ℃, stacks again particieboard, and better to content of formaldehyde effect in the reduction plate.5, artificial board formaldehyde distributes and has chronicity and intractable, wood-based plate is under the various service conditions that are not quite similar, tend to be subjected to the influence of environmental conditions such as temperature, humidity, soda acid, weathering, illumination, make that original resin that does not absolutely solidify degraded takes place and discharges formaldehyde in the plate, cause formaldehyde emission even completely crued resin also can disintegrate because of the tribulation of with the passage of time mal-condition.These reasons cause the wood-based plate that used after the long duration, and the formaldehyde emission amount of the similar plank after its formaldehyde emission amount and the hot pressing just is very nearly the same, increases sometimes even to some extent.The temperature of environment for use and relative humidity are big more, and the burst size of methanal of sheet material is big more.
In process, reduce the art methods of artificial board formaldehyde burst size, comprise the wood shavings content that reduces in the timber, naturally cooling after the hot pressing, increase hot pressing temperature, prolong hot pressing time, add formaldehyde catching agent or formaldehyde inhibitor, reduce resin added or turn down the content etc. of formaldehyde in the urea-formaldehyde resin adhesive.But these methods or increased the production cost and the production cycle of wood-based plate, or in process, increased new pollutant, or reduced the bonding quality of wood-based plate, its result is unsatisfactory, has certain limitation.And as the consumer, people have to take to add forced ventilation, postpone new house and move in the time, spray formaldehyde eliminating agent on finished product furniture, replace indoor use air purifier or plantation flowers and plants or with solid wood furniture passive method such as artificial board furniture to avoid artificial board formaldehyde to discharge the harm that brings when using wood-based plate.But adopt the method for strengthening room ventilation that practical difficulty is arranged in cold season, the sheet material exposed surface is present in inside of furniture more, and general method of ventilation does not have very good effect yet.Investigation shows, fits up and move into furniture, places after 6 months, and indoor formaldehyde concentration is significantly reduced, and personnel reentered and can significantly reduce the harm that the formaldehyde pollution brings this moment.Though this method is effective, the cycle is oversize, does not generally have practical significance.A large amount of methods of using solid wood furniture to replace artificial board furniture, in short supply limited from timber resources with consuming capacity, do not have the meaning of popularization in China.
The composition of formaldehyde eliminating agent mainly divides three classes: a class is medicaments such as sulphite, ammonia, organic amine.After being sprayed on the wood-based plate surface, can play polymerisation with the formaldehyde that wood-based plate discharges.Shortcoming is that quantity for spray is limited, and after medicament ran out of very soon, the elimination effect was promptly lost efficacy.Second class is a sealer.This class material can not be eliminated formaldehyde, and its principle is to form the fine and close diaphragm of one deck on the wood-based plate surface.Shortcoming is poor for rough surperficial result of use, for there being combination with decorative surfaces to use.The 3rd class is the bioactive enzyme of energy decomposing formaldehyde.Shortcoming is to cost an arm and a leg, and should not promote.Because it is a very long process that artificial board formaldehyde distributes, therefore use traditional air purification method, waste time and energy and effect limited.
Summary of the invention
At the problems referred to above, the purpose of this invention is to provide that a kind of reaction efficiency height, good stability, cheap, no new nuisance generate and based on the method and the device of the elimination free formaldehyde in artificial board of advanced oxidation processes principle.
For achieving the above object, the present invention takes following technical scheme: a kind of method of eliminating free formaldehyde in artificial board, it may further comprise the steps: (1) is in water or contain in the water of 5～10% hydrogen peroxide and feed ozone, the ozone generating capacity of the ozone generator that per kilogram solution is mated is not less than 1000mg/h, and the feeding time is no less than 10 minutes; (2) with the solution spraying that makes on the surface of wood-based plate, on average spraying density is 10～30g/m
2(3) wood-based plate is placed in the continuous ozoniferous closed processes case, ozone hour generating capacity on average is not less than 1g/hm to the inner headroom volume of treatment box
3(4) use the surface of UV-irradiation wood-based plate simultaneously with step (3), the general power of uviol lamp on average is not less than 1W/m to the area of processing wood-based plate
2Ozone and moist wood-based plate surface contacts and dissolve by above-mentioned steps,, produce free oxygen free radical (O), free oxygen free radical (O) and water molecule reaction generation hydroxyl radical free radical (OH) when ozone during by UV-irradiation; Meanwhile produce hydrogen peroxide (H at the high humidity material surface
2O
2), hydrogen peroxide (H
2O
2) decomposition generation OH (hydroxyl radical free radical) under the irradiation of ultraviolet light; Along with hydroxyl radical free radical (OH) to the sheet material internal penetration, the free formaldehyde in institute's permeable areas is oxidized to carbon dioxide and water, thereby eliminates the free formaldehyde in the wood-based plate.
In the described treatment box fan is housed, hour air quantity of described fan is more than or equal to treatment box inside headroom volume.
Described treatment box is provided with humidifier, and the humidification amount of described humidifier can reach the air wetting in the treatment box 80% relative humidity at least.
Be provided with a heater in the described treatment box, its heating-up temperature is 30～60 ℃.
A kind of device of eliminating free formaldehyde in artificial board is characterized in that: it comprises a closed processes case, an ozone generator, a humidifier and several uviol lamps; Described treatment box has an openable chamber door, described ozone generator and humidifier are separately positioned on described treatment box surface, described ozone generator by pipeline connect respectively described treatment box into and out of pore, described humidifier connects the wet hole that adds of described treatment box by pipeline, and described uviol lamp is installed in the described treatment box.
The another kind of device of eliminating free formaldehyde in artificial board, it is characterized in that: it comprises a closed processes case, an ozone generator, a humidifier and several uviol lamps; Described treatment box has an openable chamber door, and described ozone generator, humidifier and uviol lamp are separately positioned in the described treatment box.
Be provided with fan in the described treatment box.
Be provided with heater in the described treatment box.
Described heater is an electric heater.
Described heater is the water-gas type heat exchanger that is arranged in the described treatment box, described heat exchanger by entery and delivery port be positioned at described treatment box external heated pipeline and link to each other.
Described heater is for being arranged on intercalated water sleeve on the described treatment box wall, the water in the described water jacket by entery and delivery port be positioned at described treatment box external heated pipeline and link to each other.
The inventive method compared with prior art, have the following advantages and the high-lighting effect: 1, the present invention adopts ozone to generate hydroxyl radical free radical (OH) and eliminates free formaldehyde in the artificial board, hydroxyl radical free radical (OH) standard electrode EMF is 2.8V, and oxidability is very strong, so the purification efficiency height.2, the present invention finally is oxidized to carbon dioxide and water with harmful substance, so non-secondary pollution.3, the present invention compares with the method that formaldehyde eliminating agents such as use sulphite, ammonia, urea are handled free formaldehyde in the wood-based plate, and is with low cost, do not have and decomposes the danger that may or produce new nuisance that produces formaldehyde again.4, ozone generation technology used in the present invention, uviol lamp manufacturing technology are comparatively ripe prior aries, therefore generate the process stabilization of hydroxyl radical free radical (OH), and the wood-based plate purification efficiency is stable.5, flow process of the present invention is simple, and used assembly can directly buy on market, is easy to realize.6, the present invention can realize control to hydroxyl radical free radical (OH) growing amount, the detergent power of adjusting device easily by regulating ozone output or ultra violet lamp number.Apparatus of the present invention are simple in structure, and are easy to make, can realize the inventive method effectively.
Description of drawings
Fig. 1 is a kind of apparatus structure schematic diagram special-purpose in the inventive method
Fig. 2～Fig. 7 is that the present invention is 3g at the ozone generating capacity, when treatment temperature is respectively 45 ℃, 60 ℃, deal with core-board separately 2h, 4h, 6h after, the concentration of formaldehyde change curve of core-board
The specific embodiment
The invention will be further described below in conjunction with accompanying drawing and preferred embodiment.
As shown in Figure 1,, a closed processes case 1 need be set, several uviol lamps 3, an ozone generator 5, one humidifiers 6 are installed on treatment box 1 surface for realizing the inventive method.Ozone generator 5 links to each other with air admission hole 10, venthole 11 on the treatment box respectively by pipeline.Humidifier 6 links to each other with the wet hole 12 that adds on the treatment box 1 by pipeline.
In the said apparatus, the size of treatment box 1 can if treatment box 1 space allows, can be arranged on treatment box 1 inside with ozone generator 5 and humidifier 6 according to the quantity and the size design of the wood-based plate of planning single treatment.Can be in the treatment box 1 in the bottom or both sides wood-based plate fixed support 7 is set, wood-based plate can the compartment of terrain vertical or horizontal direction be folded between the fixed support 7, the number of fixed support 7 is determined by the quantity of processing wood-based plate.The import and export of treatment box 1 can be top cover, certain sidewall whole or local of treatment box 1, preferably make the chamber door 2 of an activity, to make things convenient for wood-based plate from the chamber door of opening 2 treatment boxes 1 of coming in and going out.One thieff hatch 8 also is set, to carry out the concentration of formaldehyde test on treatment box 1.
The humidification amount of the generating capacity of ozone generator 5, humidifier 6 is according to the concrete size decision of treatment box 1, and the ozone hour generating capacity of general ozone generator 5 on average is not less than 1g/hm to treatment box 1 inner headroom volume
3, the humidification amount of humidifier 6 wants generally to guarantee that with the air in the treatment box 1 humidification reaches 80% relative humidity at least when treatment temperature is 30～60 ℃ usually, purpose is the excessive vaporization that prevents the wood-based plate surface moisture.
The ultraviolet wavelength of uviol lamp can be positioned at arbitrary scope of A, B, C triband, and wherein A band is 320～400nm; The B wave band is 275～320nm; C-band is 200～275nm.The general power of uviol lamp is according to the treating capacity decision of wood-based plate, and the general power of uviol lamp on average should be not less than 1W/m to the gross area of processing wood-based plate
2
One one or two ones or more windy fan 4 can be housed in treatment box 1, and the position of fan 4 can be selected, and hour air quantity of fan 4 should promote the equally distributed effect of ozone in the case to reach more than or equal to treatment box inside headroom volume.
Embodiment 1:
Buy three wood-based plates of same batch of same producer, be sawn into two halves respectively, test the formaldehyde emission amount of these six wood-based plate samples then.Test result shows that the formaldehyde emission amount of two half block plates of same wood-based plate is equal substantially.Optional one is placed on the ventilation from two samples that derive from same wood-based plate, allows it distribute naturally, and adopts the inventive method to handle on another sample.Processing method and process are as follows:
(1) feed ozone in the aqueous solution that contains 5% hydrogen peroxide, the ozone generating capacity of the ozone generator that per kilogram solution is mated is 1200mg/h, 10 minutes feeding time.
(2) with this solution with 10g/m
2Density be sprayed on the wood-based plate specimen surface of three half blocks.
(3) in advance the temperature in the treatment box 1 is heated to 45 ℃, opens the chamber door 2 of treatment box 1, wood-based plate is put into treatment box 1, be fixed on two fixed supports 7, an electric-heating steam humidifier 6 is increased to 80% by adding wet hole with relative humidity in the treatment box 1.Open fan 4, open uviol lamp 3, ultraviolet light is directly or by reflected illumination each surface at wood-based plate.Start ozone generator 5 simultaneously and feed ozone in treatment box 1, the ozone generating capacity is 3g/h, and the processing time is set at 2h, 4h and 6h respectively.
(4) behind setting-up time, close ozone generator 5, uviol lamp 3, fan 4, take out processed wood-based plate sample, be placed in the ventilated environment identical dry with other three wood-based plate samples that distribute naturally.
After (5) 72 hours, three wood-based plate samples that adopt the inventive method to handle are distributed three wood-based plate samples in addition of handling with the employing nature carry out the formaldehyde emission amount according to test.Test is carried out in treatment box 1.It is airtight respectively institute's test specimens to be put into treatment box 1, and the fan 4 that blows in measures concentration of formaldehyde in the treatment box 1 by thieff hatch 8.The concentration of formaldehyde of each sample in treatment box 1 changes as Fig. 2, Fig. 3, shown in Figure 4, " A " curve among the figure is the concentration of formaldehyde change curve of treated core-board, and " B " curve is the concentration of formaldehyde change curve of the not treated core-board that is used for contrasting.
As shown in Figure 2, be 3g/h at the ozone generating capacity, 45 ℃ of treatment temperatures, under the condition of processing time 2h, the formaldehyde emission amount of handling the back test specimen is compared with the test specimen that adopts nature to distribute processing and has approximately been reduced 64%.
As shown in Figure 3, be 3g/h at the ozone generating capacity, 45 ℃ of treatment temperatures, under the condition of processing time 4h, the formaldehyde emission amount of handling the back test specimen is compared with the test specimen that adopts nature to distribute processing and has approximately been reduced 73%.
As shown in Figure 4, be 3g/h at the ozone generating capacity, 45 ℃ of treatment temperatures, under the condition of processing time 6h, the formaldehyde emission amount of handling the back test specimen is compared with the test specimen that adopts nature to distribute processing and has approximately been reduced 76%.
Embodiment 2:
The step of present embodiment is identical with embodiment 1.Except treatment temperature being changed into 60 ℃, all the other processing parameters are identical, and the concentration of formaldehyde of each sample in treatment box 1 changes as Fig. 5, Fig. 6, shown in Figure 7." A " curve among the figure is the concentration of formaldehyde change curve of treated core-board, and " B " curve is the concentration of formaldehyde change curve of the not treated core-board that is used for contrasting.
As shown in Figure 5, be 3g/h at the ozone generating capacity, 60 ℃ of treatment temperatures, under the condition of processing time 2h, the formaldehyde emission amount of handling the back test specimen is compared with the test specimen that adopts nature to distribute processing and has approximately been reduced 74%.
As shown in Figure 6, be 3g/h at the ozone generating capacity, 60 ℃ of treatment temperatures, under the condition of processing time 4h, the formaldehyde emission amount of handling the back test specimen is compared with the test specimen that adopts nature to distribute processing and has approximately been reduced 74%.
As shown in Figure 7, be 3g/h at the ozone generating capacity, 60 ℃ of treatment temperatures, under the condition of processing time 6h, the formaldehyde emission amount of handling the back test specimen is compared with the test specimen that adopts nature to distribute processing and has approximately been reduced 72%.
The comparative result of present embodiment shows: adopt the inventive method to eliminate the interior free formaldehyde of wood-based plate, its treatment effect was determined jointly by advanced oxidation efficient, treatment temperature, processing time.When treatment temperature was 60 ℃, because the reduction rate of ozone and free hydroxyl is accelerated, the depth of interaction that permeates to wood-based plate inside reduced.So along with the prolongation in processing time, treatment effect moves closer to and the treatment effect when being lower than 45 ℃.
Claims (17)
1, a kind of method of eliminating free formaldehyde in artificial board, it may further comprise the steps:
(1) in water or contain in the water of 5～10% hydrogen peroxide and feed ozone, the ozone generating capacity of the ozone generator that per kilogram solution is mated is not less than 1000mg/h, and the feeding time is no less than 10 minutes;
(2) with the solution spraying that makes on the surface of wood-based plate, on average spraying density is 10～30g/m
2
(3) wood-based plate is placed in the continuous ozoniferous closed processes case, ozone hour generating capacity on average is not less than 1g/hm to the inner headroom volume of treatment box
3
(4) use the surface of UV-irradiation wood-based plate simultaneously with step (3), the general power of uviol lamp on average is not less than 1W/m to the area of processing wood-based plate
2
Ozone and moist wood-based plate surface contacts and dissolve by above-mentioned steps, when ozone during by UV-irradiation, generation free oxygen free radical, free oxygen free radical and water molecule reaction generation hydroxyl radical free radical; Meanwhile produce hydrogen peroxide at the high humidity material surface, hydrogen peroxide decomposes the generation hydroxyl radical free radical under the irradiation of ultraviolet light; Along with hydroxyl free basal orientation sheet material internal penetration, the free formaldehyde in institute's permeable areas is oxidized to carbon dioxide and water, thereby eliminates the free formaldehyde in the wood-based plate.
2, a kind of method of eliminating free formaldehyde in artificial board as claimed in claim 1 is characterized in that: be provided with fan in the described treatment box, hour air quantity of described fan is more than or equal to treatment box inside headroom volume.
3, a kind of method of eliminating free formaldehyde in artificial board as claimed in claim 1 or 2, it is characterized in that: described treatment box is provided with humidifier, and the humidification amount of described humidifier can reach the air wetting in the treatment box 80% relative humidity at least.
4, a kind of method of eliminating free formaldehyde in artificial board as claimed in claim 1 or 2 is characterized in that: be provided with heater in the described treatment box, its heating-up temperature is 30～60 ℃.
5, a kind of method of eliminating free formaldehyde in artificial board as claimed in claim 3 is characterized in that: be provided with heater in the described treatment box, its heating-up temperature is 30～60 ℃.
6, a kind of device of eliminating free formaldehyde in artificial board is characterized in that: it comprises a closed processes case, an ozone generator, a humidifier and several uviol lamps; Described treatment box has an openable chamber door, described ozone generator and humidifier are separately positioned on described treatment box surface, described ozone generator by pipeline connect respectively described treatment box into and out of pore, described humidifier connects the wet hole that adds of described treatment box by pipeline, and described uviol lamp is installed in the described treatment box.
7, a kind of device of eliminating free formaldehyde in artificial board as claimed in claim 6 is characterized in that: be provided with fan in the described treatment box.
8, as claim 6 or 7 described a kind of devices of eliminating free formaldehyde in artificial board, it is characterized in that: be provided with heater in the described treatment box.
9, a kind of device of eliminating free formaldehyde in artificial board as claimed in claim 8, it is characterized in that: described heater is an electric heater.
10, a kind of device of eliminating free formaldehyde in artificial board as claimed in claim 8, it is characterized in that: described heater is the water-gas type heat exchanger that is arranged in the described treatment box, described heat exchanger by entery and delivery port be positioned at described treatment box external heated pipeline and link to each other.
11, a kind of device of eliminating free formaldehyde in artificial board as claimed in claim 8, it is characterized in that: described heater is for being arranged on intercalated water sleeve on the described treatment box wall, the water in the described water jacket by entery and delivery port be positioned at described treatment box external heated pipeline and link to each other.
12, a kind of device of eliminating free formaldehyde in artificial board is characterized in that: it comprises a closed processes case, an ozone generator, a humidifier and several uviol lamps; Described treatment box has an openable chamber door, and described ozone generator, humidifier and uviol lamp are separately positioned in the described treatment box.
13, a kind of device of eliminating free formaldehyde in artificial board as claimed in claim 12 is characterized in that: be provided with fan in the described treatment box.
14, as claim 12 or 13 described a kind of devices of eliminating free formaldehyde in artificial board, it is characterized in that: be provided with heater in the described treatment box.
15, a kind of device of eliminating free formaldehyde in artificial board as claimed in claim 14, it is characterized in that: described heater is an electric heater.
16, a kind of device of eliminating free formaldehyde in artificial board as claimed in claim 14, it is characterized in that: described heater is the water-gas type heat exchanger that is arranged in the described treatment box, described heat exchanger by entery and delivery port be positioned at described treatment box external heated pipeline and link to each other.
17, a kind of device of eliminating free formaldehyde in artificial board as claimed in claim 14, it is characterized in that: described heater is for being arranged on intercalated water sleeve on the described treatment box wall, the water in the described water jacket by entery and delivery port be positioned at described treatment box external heated pipeline and link to each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101158687A CN1329171C (en) | 2005-11-10 | 2005-11-10 | Method and device for removing free formaldehyde in artificial board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101158687A CN1329171C (en) | 2005-11-10 | 2005-11-10 | Method and device for removing free formaldehyde in artificial board |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1785617A CN1785617A (en) | 2006-06-14 |
| CN1329171C true CN1329171C (en) | 2007-08-01 |
Family
ID=36783271
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005101158687A Expired - Fee Related CN1329171C (en) | 2005-11-10 | 2005-11-10 | Method and device for removing free formaldehyde in artificial board |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1329171C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107571370A (en) * | 2017-10-17 | 2018-01-12 | 昆山苏熙旺卡投资管理有限公司 | A kind of density board handling process and its processing equipment |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102672785B (en) * | 2012-05-22 | 2014-10-01 | 文安县天华密度板有限公司 | Method for preparing multifunctional environment-friendly artificial board by fumigating vegetable fiber with ozone |
| CN103624852B (en) * | 2013-11-15 | 2016-03-02 | 绥中未名合一再生材料科技有限公司 | The method of a kind of water wood rosewood material taste removal |
| CN104690794A (en) * | 2013-12-10 | 2015-06-10 | 丛树茂 | Method and device for anti-deformation and environment-friendly repurification treatment of boards |
| CN104441195B (en) * | 2014-11-22 | 2016-06-29 | 福建农林大学 | Reduce the electron beam irradiation technique of urea-formaldehyde glue artificial board formaldehyde burst size |
| CN109535358B (en) * | 2018-11-26 | 2021-07-23 | 上海绿强新材料有限公司 | Method for removing free formaldehyde in phenolic resin |
| CN114442696B (en) * | 2022-01-24 | 2023-05-05 | 成都市绿色快线环保科技有限公司 | Temperature control system and method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10139902A (en) * | 1996-11-11 | 1998-05-26 | Dainippon Printing Co Ltd | Method for treating substrate |
| JPH10138206A (en) * | 1996-11-11 | 1998-05-26 | Dainippon Printing Co Ltd | Method for treating substrate |
| JP2004299093A (en) * | 2003-03-28 | 2004-10-28 | Daiken Trade & Ind Co Ltd | Method for treating woody material to suppress diffusion of volatile organic substance of the woody material |
| CN2660367Y (en) * | 2003-06-24 | 2004-12-01 | 大连广汇气体设备有限公司 | Air purifying unit of central air conditioner |
-
2005
- 2005-11-10 CN CNB2005101158687A patent/CN1329171C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10139902A (en) * | 1996-11-11 | 1998-05-26 | Dainippon Printing Co Ltd | Method for treating substrate |
| JPH10138206A (en) * | 1996-11-11 | 1998-05-26 | Dainippon Printing Co Ltd | Method for treating substrate |
| JP2004299093A (en) * | 2003-03-28 | 2004-10-28 | Daiken Trade & Ind Co Ltd | Method for treating woody material to suppress diffusion of volatile organic substance of the woody material |
| CN2660367Y (en) * | 2003-06-24 | 2004-12-01 | 大连广汇气体设备有限公司 | Air purifying unit of central air conditioner |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107571370A (en) * | 2017-10-17 | 2018-01-12 | 昆山苏熙旺卡投资管理有限公司 | A kind of density board handling process and its processing equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1785617A (en) | 2006-06-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1329171C (en) | Method and device for removing free formaldehyde in artificial board | |
| CN108081414B (en) | A kind of mould proof bamboo shaving plate and preparation method thereof | |
| CN101804655B (en) | Production process of formaldehyde-removing solid wood floor | |
| CN101804654B (en) | Process for producing formaldehyde-removing solid wood flooring | |
| CN204997794U (en) | Eliminate wooden board free formaldehyde device | |
| CN106738115B (en) | A kind of anticorrosive mildewproof environment-friendly plywood and preparation method thereof | |
| CN2889669Y (en) | Device for eliminating free formaldehyde in artificial plate | |
| Yang et al. | Recent advances in the control of volatile organic compounds emissions from indoor wood-based panels: A comprehensive review | |
| CN109621697A (en) | A method of removing indoor formaldehyde | |
| KR101557244B1 (en) | Construction method for prevention of sick house syndrome and construction body manufactured by thereof | |
| CN103203786A (en) | Poplar modifying process | |
| KR100702622B1 (en) | Fiber panels for construction or furniture and producing methods thereof | |
| CN109333692A (en) | A kind of method that plasma modification height emulates scientific and technological wood skin | |
| CN206128523U (en) | Decontaminable air's ceiling | |
| CN110216748B (en) | Aldehyde-free UV wood board with antibacterial function and preparation process thereof | |
| CN107322723A (en) | A kind of processing method of fire-retardant platane wood | |
| CN106078989A (en) | Wood comprehensive processing means and method | |
| JP6254457B2 (en) | Hazardous oxide remover and method for removing harmful oxide using the same | |
| CN107009478A (en) | One kind is in corona treatment wood-fibred reinforcing fiber board interface bonding capacity method | |
| CN101716792A (en) | Method for manufacturing respiration type artificial board capable of absorbing and decomposing organic matter | |
| CN112692944B (en) | Formaldehyde removal device and process for artificial board | |
| CN210332269U (en) | Portable formaldehyde treatment instrument | |
| CN205870784U (en) | Processing apparatus is synthesized to timber | |
| CN109551855B (en) | Photocatalytic high-pressure decorative plate and preparation method thereof | |
| CN110434966A (en) | A kind of production technology of environment friendly artificial board |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070801 Termination date: 20111110 |