CN105459240B - The equipment that a kind of microwave vacuum method reduces artificial board formaldehyde burst size - Google Patents
The equipment that a kind of microwave vacuum method reduces artificial board formaldehyde burst size Download PDFInfo
- Publication number
- CN105459240B CN105459240B CN201510787578.0A CN201510787578A CN105459240B CN 105459240 B CN105459240 B CN 105459240B CN 201510787578 A CN201510787578 A CN 201510787578A CN 105459240 B CN105459240 B CN 105459240B
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- Prior art keywords
- microwave
- formaldehyde
- equipment
- hatch door
- row
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Classifications
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- 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
- B27K5/00—Treating of wood not provided for in groups B27K1/00, B27K3/00
- B27K5/003—Treating of wood not provided for in groups B27K1/00, B27K3/00 by using electromagnetic radiation or mechanical waves
- B27K5/0065—Ultrasonic treatment
-
- 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
- B27K2200/00—Wooden materials to be treated
- B27K2200/10—Articles made of particles or fibres consisting of wood or other lignocellulosic material
Abstract
The present invention discloses the equipment that a kind of microwave vacuum method reduces artificial board formaldehyde burst size, belongs to the formaldehyde reduced apparatus field of woodwork microwave.The microwave action chamber of the equipment is cylindrical shape, is horizontally mounted, charging hatch door and discharging hatch door of the two ends provided with spherical crown shape, and form is respectively equipped with charging hatch door and discharging hatch door；On the cylinder inner wall of the left and right sides mouth is presented along cylinder generatrix direction at least provided with the equally distributed microwave of a row；Multiple temperature sensors and a vacuum meter are housed in microwave action intracavitary portion；Temperature sensor, vacuum meter are connected with controller respectively；The bottom of microwave action chamber is provided with guide rail, parks and passes through for material conveying trolley, and material conveying trolley is provided with the row's roller for placing wood-based plate；Microwave action chamber is sequentially connected vavuum pump and formaldehyde retracting device by pipeline.The equipment can efficiently solve the problem of artificial board formaldehyde burst size is exceeded, and meet the demand of industrial production of serialization and mass.
Description
Technical field
The industrial equipment of artificial board formaldehyde is reduced the present invention relates to a kind of, belongs to the formaldehyde reduced apparatus field of woodwork microwave.
Background technology
Urea-formaldehyde resin adhesive due to function admirable, it is with low cost the advantages of and as production wood-based plate main glue kind,
But this kind of wood-based plate is often due to burst size of methanal is exceeded and seriously endangers health.Improve adhesive, addition formaldehyde catching
Agent and the content of formaldehyde in wood-based plate can be reduced to a certain extent using the method such as rational wood-based plate heat pressing process, but by
In sheet material mechanical property to be considered, production cost and presentation quality etc., the effect of above method reduction burst size of methanal is limited,
So that substantial amounts of free formaldehyde still may be discharged in the artificial board finished product of production.
Therefore, wood-based plate also needs to carry out the drop aldehyde processing in later stage, veneer edge sealing is that current wood-based panel industry is generally used
Drop aldehyde method, its role is on the one hand limit the Form aldehyde release of wood-based plate, on the other hand also prevent wood-based plate moisture absorption
So that urea-formaldehyde resin adhesive occurs to hydrolyze and release formaldehyde, and but if breakage once occurs for finishing material, its inner accumulation
Formaldehyde can discharge at double, therefore, this method can not fundamentally reduce the burst size of methanal of wood-based plate.Hot ammonia treatment energy
The formaldehyde in wood-based plate is effectively eliminated, but ammonia consumption is larger, and processing procedure is slow, and complicated huge processing equipment
So that cost is too high.Application of vacuum be utilize artificial intralamellar part and external environment are produced under condition of negative pressure concentration of formaldehyde difference so as to
Promote the process of free formaldehyde release, however, individually application of vacuum is to the separation of wood-based plate inside formaldehyde molecule and diffusion
Influence is smaller, therefore less efficient.The degraded effect for the formaldehyde gas that dielectric barrier discharge facture is discharged to wood-based plate
Rate is higher, but the commercial Application of large-scale needs further to suppress the generation of harmful side product, increases reaction selectivity, reduction
Energy consumption and operating cost.
The drop aldehyde methods and techniques in above-mentioned various wood-based plate later stages suffer from treatment effeciency, energy consumption, pollution and operation
The limitation of the factors such as cost and be difficult to be applied in wood-based panel industry on a large scale.
The content of the invention
The problem of artificial board formaldehyde burst size is exceeded is solved in order to effective, and for being asked present in above-mentioned prior art
Topic and defect, it is an object of the invention to provide the equipment that a kind of microwave vacuum method reduces artificial board formaldehyde burst size.
To achieve these goals, the present invention uses following design：
A kind of microwave vacuum method reduces the equipment of artificial board formaldehyde burst size, the microwave action chamber of the equipment（3）For cylinder
Shape, is horizontally mounted, and can improve the uniformity of microwave distribution, also meet the design requirement of general pressure vessel；In microwave action
Charging hatch door and discharging hatch door of the two ends of chamber provided with spherical crown shape, to prevent microwave leakage and keep the true of microwave action intracavitary portion
Reciprocal of duty cycle.
Form is respectively equipped with charging hatch door and discharging hatch door, its inner case can be observed.
It is uniformly distributed on the left and right sides cylindrical wall in microwave action intracavitary portion along cylinder generatrix direction at least provided with a row
Microwave feedback mouth, and often row include at least two microwaves feedback mouth, with improve microwave be distributed uniformity and microwave treatment efficiency；
Microwave feedback mouth is connected with magnetron and controller successively.
Multiple temperature sensors and a vacuum meter are housed in microwave action intracavitary portion；Temperature sensor, vacuum meter difference
It is connected with controller, the temperature in wood-based plate processing procedure and vacuum can be in real time measured.
The bottom of microwave action chamber is provided with guide rail, parks and passes through for material conveying trolley, and material conveying trolley is provided with and is horizontally mounted
Multilayer row's roller, can correspondingly place multilayer wood-based plate, the conveying direction for arranging roller is identical with cylinder generatrix direction, is easy to artificial
Plate is loaded and unloaded, and the distance between adjacent two layers row's roller is at least twice of artificial board thickness, to increase microwave action in artificial
The area of plate and the rate of release for accelerating wood-based plate formaldehyde in processing procedure.
The microwave action chamber of the equipment is sequentially connected vavuum pump and formaldehyde retracting device by pipeline；Vavuum pump is made for microwave
The formaldehyde gas that certain negative pressure is provided with intracavitary portion and makes wood-based plate be produced in processing procedure enters first by sealing pipeline
Aldehyde retracting device, the formaldehyde of recovery can be used as the raw material for producing urea-formaldehyde resin adhesive after certain post-processing；Institute
The formaldehyde retracting device stated reclaims formaldehyde using the principle of washing.
Described equipment can select the microwave that frequency is 915MHz or 2450MHz according to thickness, useful load of wood-based plate etc.
Wood-based plate is handled.
Described charging hatch door and discharging hatch door is provided with screen layer and sealant.
Described controller can be to the display of temperature, vacuum and microwave input power, record and regulation and control.
The present invention operation principle be：
Formaldehyde is divided into two stages as the release of major pollutants, is the formaldehyde point in the presence of concentration gradient first
Son moved about from the sandwich layer of material to material interface, then on gas-solid interface, due to external environmental factor, molecular motion and
The presence of material hole, some formaldehyde molecules depart from material surface in the presence of concentration gradient again, enter the external world of surrounding
It is then rapid to be well mixed in small space in environment, as the exchange of gas is pulled away and progressivelyes reach balance.Therefore, exist
Increase the content of formaldehyde that separation and diffusion energy of the formaldehyde inside wood-based plate are effectively reduced in wood-based plate in processing procedure, and increase
The concentration difference of formaldehyde is then conducive to accelerating the evaporation rate of formaldehyde inside and outside big sheet material.
The temperature of artificial plate surface is less than core layer temperature in microwave heating process, the low inside and high outside moisture content ladder with wood-based plate
Degree is identical, and this moisture speeded up in wood-based plate is moved and from surface evaporation from inside to outside, so as to be formaldehyde point in wood-based plate
The migration of son provides passage and driving force.The formaldehyde that wood-based plate inevitably has sandwich layer during the manufacturing contains
Amount is higher than top layer, and formaldehyde has characteristic soluble in water, therefore, while moisture loss has also taken away the first in wood-based plate
Aldehyde.In addition, formaldehyde as a kind of polar molecule by can also accelerate rate of release during microwave action.Meanwhile, in the work of vavuum pump
Under, the negative pressure that microwave microwave action intracavitary is produced adds the concentration difference of formaldehyde gas inside and outside sheet material, is also beneficial to formaldehyde
Volatilization.The formaldehyde gas that wood-based plate is produced in processing procedure enters formaldehyde under the swabbing action of vavuum pump by sealing pipeline
Retracting device, the formaldehyde of collection can be used as the raw material for producing urea-formaldehyde resin adhesive after certain processing.
Therefore, the invention can be handled wood-based plate progress drop aldehyde efficient, in batches, continuously, and can realize pollutant
Recycling.
Brief description of the drawings
Fig. 1 is system structure diagram of the invention
Fig. 2 is microwave action cavity configuration schematic diagram of the invention
Fig. 3 is row's roller schematic diagram of the invention
Wherein, 1. form, 2. charging hatch doors, 3. microwave action chambers, 4. temperature sensors, 5. wood-based plates, 6. row's rollers, 7.
Material conveying trolley, 8. microwaves feedback mouth, 11. controllers, 12. guide rails, 13 vacuum meters, 14. vavuum pumps, 15 formaldehyde retracting devices, 16.
Discharge hatch door.
Embodiment
Below in conjunction with the accompanying drawings and the present invention will be further described by embodiment.
The equipment using microwave vacuum technology to wood-based plate carry out drop aldehyde processing, microwave operational frequencies be 915MHz or
2450MHz, the microwave equipment cost that frequency is 915MHz is higher than the microwave equipment that frequency is 2450MHz, but the former is with bigger
Penetration depth, therefore, in industrial production can according to the concrete conditions such as thickness, the useful load of handled wood-based plate select microwave
Frequency.
The microwave action chamber 3 of the equipment is cylindrical shape, is horizontally mounted, and can improve the uniformity of microwave distribution, also meet
The design requirement of general pressure vessel, in produce reality, the size of big I wood-based plate handled by of microwave action chamber
Specification makes the appropriate adjustments.
Charging hatch door 2 and discharging hatch door 16 of the equipment provided with spherical crown shape, charging hatch door 2 and discharging hatch door 16 are provided with screen
Layer and sealant are covered, to prevent microwave leakage and keep the vacuum in microwave action intracavitary portion, charging hatch door 2 and discharging hatch door 16
Form 1 is provided with, its inner case can be observed when the equipment works.
It is uniform at least provided with a row along cylinder generatrix direction on left and right sides cylindrical wall inside the equipment microwave action chamber 3
The microwave feedback mouth 8 of distribution, and often row includes at least two microwaves feedback mouth 8, to improve the uniformity and microwave treatment of microwave distribution
Efficiency, microwave feedback mouth 8 microwave feedback mouth is connected with magnetron and controller 11 successively, microwave system using INDIRECT COUPLING energy regenerative
Mode prevents gas breakdown and arcing electric discharge phenomena to reduce the power density of energy regenerative coupling aperture.
Temperature sensor 4, the vacuum meter 13 of the equipment are connected with controller 11 respectively, can be realized to people by controller 11
Make the temperature in plate processing procedure, the display of vacuum and microwave input power, record and regulate and control.
The bottom of the equipment microwave action chamber is provided with guide rail 12, parks and passes through for material conveying trolley 7, is set on material conveying trolley 7
There is the multilayer row's roller 6 being horizontally mounted, can correspondingly place multilayer wood-based plate 5, arrange the conveying direction and cylinder generatrix direction phase of roller 6
Together, it is easy to load and unload wood-based plate, the distance between adjacent two layers row's roller is at least twice of artificial board thickness, micro- to increase
Ripple acts on the area of wood-based plate and accelerates the rate of release of wood-based plate formaldehyde in processing procedure.
The microwave action chamber 3 of the equipment is sequentially connected vavuum pump 14 and formaldehyde retracting device 15, vavuum pump 14 by pipeline
The formaldehyde gas for providing certain negative pressure for the inside of microwave action chamber 3 and making wood-based plate be produced in processing procedure passes through seal pipe
Road enters formaldehyde retracting device 15, and the formaldehyde of recovery can be used as production urea-formaldehyde resin adhesive after certain post-processing
Raw material.
Claims (2)
1. the equipment that a kind of microwave vacuum method reduces artificial board formaldehyde burst size, it is characterised in that：The microwave action chamber of the equipment
（3）For cylindrical shape, it is horizontally mounted；The charging hatch door of spherical crown shape is provided with the two ends of microwave action chamber（2）With discharging hatch door（16）,
Feed hatch door（2）With discharging hatch door（16）On be respectively equipped with form（1）；In microwave action chamber（3）Internal left and right sides cylinder
On wall mouth is presented along cylinder generatrix direction at least provided with the equally distributed microwave of a row（8）；Microwave presents mouth（8）Successively with magnetron and
Controller（11）It is connected；In microwave action chamber（3）Inside is equipped with multiple temperature sensors（4）With a vacuum meter（13）；Temperature
Sensor（4）, vacuum meter（13）Respectively with controller（11）It is connected；Microwave action chamber（3）Bottom be provided with guide rail（12）, for fortune
Trolley（7）Park and pass through, material conveying trolley（7）Provided with placement wood-based plate（5）Row's roller（6）；The microwave action of the equipment
Chamber（3）Vavuum pump is sequentially connected by pipeline（14）With formaldehyde retracting device（15）；
The microwave frequency of described equipment is 915MHz or 2450MHz；
Described charging hatch door（2）With discharging hatch door（16）It is provided with screen layer and sealant；
Described controller（11）To the display of temperature, vacuum and microwave input power, record and it can regulate and control；
Described formaldehyde retracting device（15）Formaldehyde is reclaimed using the principle of washing；
Material conveying trolley（7）On row's roller（6）It is horizontally mounted, the distance between adjacent two layers row's roller is at least the two of artificial board thickness
Times, arrange roller（6）Conveying direction it is identical with cylinder generatrix direction.
2. the equipment that a kind of microwave vacuum method according to claim 1 reduces artificial board formaldehyde burst size, it is characterised in that
Described equipment is suitable to the woodwork for applying urea-formaldehyde resin adhesive.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510787578.0A CN105459240B (en) | 2015-11-17 | 2015-11-17 | The equipment that a kind of microwave vacuum method reduces artificial board formaldehyde burst size |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510787578.0A CN105459240B (en) | 2015-11-17 | 2015-11-17 | The equipment that a kind of microwave vacuum method reduces artificial board formaldehyde burst size |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105459240A CN105459240A (en) | 2016-04-06 |
| CN105459240B true CN105459240B (en) | 2017-08-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510787578.0A Expired - Fee Related CN105459240B (en) | 2015-11-17 | 2015-11-17 | The equipment that a kind of microwave vacuum method reduces artificial board formaldehyde burst size |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106078988B (en) * | 2016-08-02 | 2017-09-15 | 长沙源韵机械科技有限责任公司 | Accelerate the voltage pulse electric field processing device of Form aldehyde release inside artificial wooden sheet material |
| CN106808543B (en) * | 2017-01-09 | 2018-06-29 | 上海戊丰环保科技有限公司 | A kind of method that formaldehyde in wood-based plate is removed using microwave |
| CN114451513B (en) * | 2022-01-07 | 2023-05-02 | 西北农林科技大学 | Method for degrading endogenous formaldehyde of food by immersing Glu-Cys solution and coupling pulse strong light |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1280662A (en) * | 1997-10-30 | 2001-01-17 | 林业开发工业公司 | Method for drying saw timber and device for implementing said method |
| CN101439529A (en) * | 2008-12-23 | 2009-05-27 | 罗玉成 | Microwave vacuum drying and carbonizing device and method for wood |
| CN205219348U (en) * | 2015-11-17 | 2016-05-11 | 西北农林科技大学 | Microwave vacuum method reduces equipment of wood -based plate formaldehyde emission volume |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101318347B (en) * | 2008-07-01 | 2010-09-01 | 合肥溢新微波能科技有限公司 | Microwave energy artificial board processor |
-
2015
- 2015-11-17 CN CN201510787578.0A patent/CN105459240B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1280662A (en) * | 1997-10-30 | 2001-01-17 | 林业开发工业公司 | Method for drying saw timber and device for implementing said method |
| CN101439529A (en) * | 2008-12-23 | 2009-05-27 | 罗玉成 | Microwave vacuum drying and carbonizing device and method for wood |
| CN205219348U (en) * | 2015-11-17 | 2016-05-11 | 西北农林科技大学 | Microwave vacuum method reduces equipment of wood -based plate formaldehyde emission volume |
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| CN105459240A (en) | 2016-04-06 |
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Granted publication date: 20170808 Termination date: 20211117 |