CN101386015A - A pyrolytic separation method for metal and nonmetal in waste printed circuit boards - Google Patents
A pyrolytic separation method for metal and nonmetal in waste printed circuit boards Download PDFInfo
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- CN101386015A CN101386015A CNA2008101527632A CN200810152763A CN101386015A CN 101386015 A CN101386015 A CN 101386015A CN A2008101527632 A CNA2008101527632 A CN A2008101527632A CN 200810152763 A CN200810152763 A CN 200810152763A CN 101386015 A CN101386015 A CN 101386015A
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- 239000002184 metal Substances 0.000 title claims abstract description 26
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 26
- 238000000926 separation method Methods 0.000 title claims abstract description 16
- 239000002699 waste material Substances 0.000 title claims abstract description 7
- 229910052755 nonmetal Inorganic materials 0.000 title claims abstract 4
- 238000000197 pyrolysis Methods 0.000 claims abstract description 46
- 239000000463 material Substances 0.000 claims abstract description 30
- 238000010438 heat treatment Methods 0.000 claims abstract description 28
- 238000000034 method Methods 0.000 claims abstract description 28
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 27
- 239000007789 gas Substances 0.000 claims abstract description 14
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 13
- 239000007788 liquid Substances 0.000 claims abstract description 9
- 239000002826 coolant Substances 0.000 claims abstract description 8
- 238000003756 stirring Methods 0.000 claims description 7
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims 1
- 229910001873 dinitrogen Inorganic materials 0.000 claims 1
- 229910052760 oxygen Inorganic materials 0.000 claims 1
- 239000001301 oxygen Substances 0.000 claims 1
- 238000011084 recovery Methods 0.000 abstract description 14
- 239000002910 solid waste Substances 0.000 abstract description 2
- 238000009434 installation Methods 0.000 description 15
- 238000005979 thermal decomposition reaction Methods 0.000 description 10
- 230000000694 effects Effects 0.000 description 8
- 229910000831 Steel Inorganic materials 0.000 description 7
- 230000007613 environmental effect Effects 0.000 description 7
- 239000010959 steel Substances 0.000 description 7
- 238000007664 blowing Methods 0.000 description 5
- 238000007599 discharging Methods 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 238000003672 processing method Methods 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000005272 metallurgy Methods 0.000 description 3
- 238000009853 pyrometallurgy Methods 0.000 description 3
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000003063 flame retardant Substances 0.000 description 2
- 239000003365 glass fiber Substances 0.000 description 2
- 239000011133 lead Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 231100000614 poison Toxicity 0.000 description 2
- 230000007096 poisonous effect Effects 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 231100000331 toxic Toxicity 0.000 description 2
- 230000002588 toxic effect Effects 0.000 description 2
- 238000012795 verification Methods 0.000 description 2
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical compound [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Substances BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 description 1
- 229910052794 bromium Inorganic materials 0.000 description 1
- 125000001246 bromo group Chemical class Br* 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000013467 fragmentation Methods 0.000 description 1
- 238000006062 fragmentation reaction Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- 230000021715 photosynthesis, light harvesting Effects 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000010970 precious metal Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000002341 toxic gas Substances 0.000 description 1
- 238000001291 vacuum drying Methods 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Images
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/82—Recycling of waste of electrical or electronic equipment [WEEE]
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- Manufacture And Refinement Of Metals (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
本发明公开了一种废弃印刷线路板中金属和非金属的热解分离方法，它包括以下步骤：将废弃印刷线路板放入热解装置的炉膛内，关严炉门后先通入氮气；以15～20℃/min的升温速率对所述的炉膛内物料加热，温度升高到600～700℃后保持该温度20～30min并停炉，在对所述的物料加热的过程中保持炉膛内有微正压并对所述的物料不定期搅拌；(3)将热解产物排出所述的热解装置，经与冷却介质换热后将液体和气体产物进行分离。采用本发明的方法能够实现废弃PCB中金属和非金属的有效分离，实现固体废弃物的无害化热态分离；避免了现有技术处理过程中产生的废水、废气、废液等对环境的污染；金属的回收纯度较高。
The invention discloses a pyrolytic separation method for metal and nonmetal in waste printed circuit boards, which comprises the following steps: putting the waste printed circuit boards into the furnace of a pyrolysis device, closing the furnace door, and feeding nitrogen; Heat the material in the furnace at a heating rate of 15-20°C/min. After the temperature rises to 600-700°C, keep the temperature for 20-30 minutes and stop the furnace. During the heating of the material, keep the furnace There is a slight positive pressure inside and the materials are stirred irregularly; (3) The pyrolysis products are discharged from the pyrolysis device, and the liquid and gas products are separated after exchanging heat with the cooling medium. Adopting the method of the present invention can realize the effective separation of metal and non-metal in waste PCB, and realize the harmless thermal separation of solid waste; Pollution; metal recovery purity is higher.
Description
Technical field
The resource that the present invention relates to abandoned printed circuit board reclaims and is recycling, relates in particular to metal and nonmetallic pyrolysis separation method in a kind of abandoned printed circuit board.
Background technology
Along with popularizing and the quickening of superseded speed of household appliances, the quantity of abandoned printed circuit board (PCB) is in sharp increase.Because discarded PCB has characteristics such as high harmfulness, high value and intractability, is subjected to increasing attention for innoxious, the recycling treatment of discarding PCB.
The domestic and international at present processing method for abandoned printed circuit board mainly contains pyrometallurgy, wet chemical metallurgy, mechanical approach and burning method etc.The main target of pyrometallurgy, wet chemical metallurgy is to reclaim precious metals such as wherein platinum, palladium, gold, silver, lead, copper.But these two kinds of treatment process all exist the pollution problem of comparison serious environmental, wherein wet chemical metallurgy has also been introduced pollutants such as poisonous and harmful chemical solution, and other can utilize material also to can not get effective recovery, therefore can not satisfy resource and reclaim and requirement on environmental protection; The mechanical-physical processing method is according to the different physical characteristics that various one-tenth branch have they to be carried out sorting, but in the Mechanical Crushing process, can produce the dust that contains glass fibre and resin in a large number, and the bromine that contains in the fire retardant etc. also can give out toxic gas, heavy damage environment because of heating in the continuous crushing process; The flow process that burning method is handled is earlier discarded PCB to be crushed to 1～2 inch size through mechanical means, sends into then in an incinerator and burns, and makes organic gas and solids separation, and residue is exposed metal and glass fibre.But this processing method can make metal at high temperature oxidation take place the surface, reduces the rate of recovery and the purity of metal, and the fire retardant among the PCB contains a large amount of bromines or chlorine component simultaneously, and the burning back generates toxic and harmful easily, and air is polluted.
As seen, more than several processing methods all deficiency and the shortcoming of various degrees, be badly in need of finding a kind of relatively environmental protection and recovery method efficiently.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art; provide a kind of and can realize metal and nonmetallic effective separation the in the abandoned printed circuit board; thereby improve the recovery utilization rate of valuable resource; and can reduce the generation and the discharging of poisonous and harmful element in the processing procedure to greatest extent, realize metal and nonmetallic pyrolysis separation method in a kind of abandoned printed circuit board of purpose of resources conservation and environmental protection.
Metal and nonmetallic pyrolysis separation method in a kind of abandoned printed circuit board of the present invention, it may further comprise the steps:
(1) abandoned printed circuit board is put into the burner hearth of pyrolysis installation, fed nitrogen 3～5 minutes earlier after closing fire door tight, nitrogen flow is 30-50 liters/minutes, forms the anoxybiotic environment so that air in the burner hearth is discharged fully;
(2) heating rate with 15～20 ℃/min heats material in the described burner hearth, keep this temperature 20～30min and blowing out after temperature is elevated to 600～700 ℃, in process, keep in the burner hearth pressure-fired being arranged and described material irregularly being stirred described material heating;
(3) thermal decomposition product is discharged described pyrolysis installation, through with the cooling medium heat exchange after the liquids and gases product separated and collected respectively by container.
Adopt method of the present invention to have the following advantages:
1. the pyrolysis treating method of the present invention's proposition can be realized metal and nonmetallic effective separation the among the discarded PCB, improves the rate of recovery of valuable resource and reclaims purity;
2. adopt the inventive method to handle discarded PCB, can avoid the toxic and harmful that produced with pyrometallurgy and high temperature incineration, belong to the non smoke processing procedure; The discarded PCB of heating under anoxybiotic atmosphere can suppress the generation of bioxin from mechanism, realizes the innoxious hot separation of solid waste; The waste water of having avoided producing in the prior art processing procedure, waste gas, waste liquid etc. are to the pollution of environment;
3. owing in handling discarded PCB process, in burner hearth, increased agitator, can guarantee by pyrolysis material internal and external temperature even, overcome, pyrolysis nonsynchronous drawback big, improved whole pyrolysis efficient, reduced energy-output ratio with ubiquitous internal and external temperature gradient in the class methods.And, be convenient to further classification and recycle because the mechanical external force effect of agitating device makes metal level can thoroughly separate with non-metallic layer;
4. adopting method for pyrolysis of the present invention to handle discarded PCB, because temperature is relatively low, and is reducing atmosphere, and the degree that oxidation takes place in the metal surface is very little, so the recovery purity of metal is higher; Do not need PCB is carried out Mechanical Crushing, can overcome the metal loss that causes when handling,, be almost 100% so the rate of recovery of metal is also higher with mechanical means; Basically do not need material is carried out fragmentation and cuts apart owing to handle discarded PCB with this method, the metal dimension that obtains after the pyrolysis is bigger, makes that reclaiming becomes with further processing to be more prone to and to make things convenient for.
Description of drawings
Accompanying drawing is the pyrolysis installation schematic diagram that adopts in metal and the nonmetallic pyrolysis separation method in a kind of abandoned printed circuit board of the present invention.
The specific embodiment
Below in conjunction with the drawings and specific embodiments the present invention is done to describe in detail.
Metal and nonmetallic pyrolysis separation method in a kind of abandoned printed circuit board of the present invention, it may further comprise the steps: (1) puts into abandoned printed circuit board in the burner hearth of pyrolysis installation, fed nitrogen 3～5 minutes earlier after closing fire door tight, nitrogen flow is 30～50 liters/minute, forms the anoxybiotic environment so that air in the burner hearth is discharged fully; (2) heating rate with 15～20 ℃/min heats material in the described burner hearth, keeps this temperature 20～30min and blowing out after temperature is elevated to 600～700 ℃.In heating process, close intake valve, keep that by adjusting air valve opening pressure-fired is arranged in the burner hearth, air just can not infiltrate in the stove like this, can keep being in the stove anoxybiotic or anaerobic environment, and the gas that produces in the pyrolytic process can lean on the pressure of self to discharge, thereby saving operating cost, pressure-fired can be set as the case may be, but unsuitable too high, otherwise can cause the interior pyrolysis gas of stove to leak outside, the contaminated environment air is controlled at 2～3mmH usually
2O irregularly stirs described material in to described material heating; (3) thermal decomposition product is discharged described pyrolysis installation, through with the cooling medium heat exchange after the liquids and gases product separated and collected respectively by container.The gaseous product amount can be measured with flowmeter in this step, and the quality of liquid and using pyrolysis product can be determined by weight method.The temperature of cooling medium can be 15-25 ℃, and medium can be running water.
For guarantee that pyrolytic process is to carry out under anoxic condition, before heating, in stove, lead to the nitrogen of certain hour in the methods of the invention, to discharge the air in the stove; Close intake valve in heating process, keep the pressure-fired that has in the burner hearth by adjusting air valve opening, air just can not infiltrate in the stove like this, can keep being in the stove anoxybiotic or anaerobic environment.
The main effect of agitating device be by irregular stirring guarantee by the material inside and outside temperature of pyrolysis evenly, improve pyrolysis rate, simultaneously can provide mechanical external force to break away from fully, be convenient to classification and reclaim by metal level and the glass layer that pyrolysis has separated.
Heating rate and pyrolysis temperature are the key parameters that guarantees separating effect.Heating rate is too fast or all can make the separating effect variation slowly excessively.According to test of many times, the heating rate that reaches the optimal separation effect is 15～20 ℃/min.The height of pyrolysis temperature also directly has influence on the treatment effect of discarded PCB.The too high meeting of pyrolysis temperature causes energy dissipation, crosses to hang down and can cause pyrolysis insufficient, and separating effect is undesirable etc.Through verification experimental verification, pyrolysis temperature should be controlled at 600～700 ℃, and keeps 20～30min to be advisable under this temperature.
Accompanying drawing is the schematic diagram of the pyrolysis installation of the inventive method employing, and pyrolysis installation is not limited to the version shown in the figure certainly, can also adopt the existing pyrolysis installation of other kind.Pyrolysis installation shown in the drawings, the burner hearth 1 that it comprises the body of heater 3 that is installed on the support 13, place fire door 2 on described body of heater 3 one side end faces, surrounded by described body of heater 3 and fire door 2, the air inlet pipe 12 that escape pipe 5 that air outlet valve 4 is housed on it and one are equipped with intake valve 11 on it is passed described body of heater 3 respectively and is connected with described burner hearth 1, and the agitator that electrical heating elements 6 and its shaft 8 link to each other with whirligig is housed in described burner hearth 1.Described electrical heating elements links to each other with temperature controller.Described temperature controller is used to control heating-up temperature and programming rate.Described temperature controller can be buied on market, as homemade HK104 type, XMTA-2001 type, ITC type etc., Britain Continental Europe 2604/2704 type of import, daily output RS series etc. has been widely used in the temperature control of industrial furnaces such as vacuum drying oven, molybdenum wire furnace, steel rolling furnace, foundry furnace.Electrical heating elements can be buied in market, can be carbon-point, resistance wire.Described whirligig can be motor 10.Insert at described shaft 8 on the axis body of an end of described body of heater 3 and preferably be with axle envelope 9.Described body of heater 3 preferably is made of the heat resisting steel of internal layer and outer field steel plate and the adiabator layer that is arranged between described heat resisting steel and the steel plate.
The main effect of fire door 2 is loading and unloading materials and burner hearth is sealed in this device; Burner hearth 1 is surrounded by body of heater and fire door, is used for splendid attire by the abandoned printed circuit board of pyrolysis; Body of heater 3 is surrounded by the heat resisting steel and the outer field protection steel plate of internal layer, is insulation material between the ectonexine; Escape pipe 5 is passages that thermal decomposition product is discharged burner hearth, and air outlet valve 4 is used to control the size of gas output and the pressure in the burner hearth; The major function of electrical heating elements 6 is that material in the burner hearth is heated and makes it thermal decomposition, and the size of heating power can be regulated by temperature controller, realizes the control of pyrolysis temperature and heating rate; The agitator that stirring wheel 7 and shaft 8 are formed is mainly used to the material in the burner hearth is stirred, and guarantees that the material inside and outside temperature is even, improves pyrolysis rate; Axle envelope 9 can prevent that the gap between axle and the furnace wall from gas leakage and air intake taking place; Motor 10 drives the agitator rotation material is stirred; Intake valve 11 can be controlled the gas flow that enters in the stove, and guarantees the sealing of burner hearth; Air inlet pipe 12 is that protective gas enters the passage in the stove.
Abandoned printed circuit board is put into the burner hearth of pyrolysis installation, fed nitrogen 4 minutes earlier after closing fire door tight, nitrogen flow is 40 liters/minute, forms the anoxybiotic environment so that air in the burner hearth is discharged fully; Heating rate with 20 ℃/min heats material in the described burner hearth, keeps this temperature 25min and blowing out after temperature is elevated to 700 ℃, closes intake valve in the process to described material heating, keeps that by adjusting air valve opening 2～3mmH is arranged in the burner hearth
2The pressure-fired of O also irregularly stirs described material; Thermal decomposition product is discharged described pyrolysis installation, through with the liquids and gases product is separated after cooling medium is 15 ℃ running water heat exchange and is collected respectively by container.
After tested: the rate of recovery of metal can reach more than 96%, can utilize the nonmetallic rate of recovery to reach 90%; The discharging of thermal decomposition product can reach the relevant environmental protection standard of national regulation.
Abandoned printed circuit board is put into the burner hearth of pyrolysis installation, fed nitrogen 3 minutes earlier after closing fire door tight, nitrogen flow is 50 liters/minute, forms the anoxybiotic environment so that air in the burner hearth is discharged fully; Heating rate with 15 ℃/min heats material in the described burner hearth, after being elevated to 650 ℃, temperature keeps this temperature 20min and blowing out, in process, close intake valve, keep that by adjusting air valve opening 1.8～2.8mmH is arranged in the burner hearth described material heating
2The pressure-fired of O also irregularly stirs described material; Thermal decomposition product is discharged described pyrolysis installation, through with the liquids and gases product is separated after cooling medium is 20 ℃ running water heat exchange and is collected respectively by container.
After tested: the rate of recovery of metal can reach more than 96%, and the nonmetallic rate of recovery reaches 90%; The discharging of thermal decomposition product can reach the relevant environmental protection standard of national regulation.
Abandoned printed circuit board is put into the burner hearth of pyrolysis installation, fed nitrogen 5 minutes earlier after closing fire door tight, nitrogen flow is 30 liters/minute, forms the anoxybiotic environment so that air in the burner hearth is discharged fully; Heating rate with 18 ℃/min heats material in the described burner hearth, after being elevated to 600 ℃, temperature keeps this temperature 30min and blowing out, in process, close intake valve, keep that by adjusting air valve opening 2.5-3.8mmH is arranged in the burner hearth described material heating
2The pressure-fired of O also irregularly stirs described material; Thermal decomposition product is discharged described pyrolysis installation, through with the liquids and gases product is separated after cooling medium is 25 ℃ running water heat exchange and is collected respectively by container.
After tested: the rate of recovery of metal can reach more than 96%, can utilize the nonmetallic rate of recovery to reach 90%; The discharging of thermal decomposition product can reach the relevant environmental protection standard of national regulation.
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2008101527632A CN101386015A (en) | 2008-10-31 | 2008-10-31 | A pyrolytic separation method for metal and nonmetal in waste printed circuit boards |
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| CNA2008101527632A CN101386015A (en) | 2008-10-31 | 2008-10-31 | A pyrolytic separation method for metal and nonmetal in waste printed circuit boards |
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| CN101386015A true CN101386015A (en) | 2009-03-18 |
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Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101829666A (en) * | 2010-05-06 | 2010-09-15 | 陕西师范大学 | Pyrolyzation and debromination method of waste printed circuit board |
| CN102061008A (en) * | 2010-11-09 | 2011-05-18 | 佛山市高明区(中国科学院)新材料专业中心 | Method for reducing bromide content in pyrolysis gas of waste printed circuit board by high-temperature shock heating |
| CN102218439A (en) * | 2011-01-24 | 2011-10-19 | 同济大学 | Method for pyrolysis separation of valuable components from substrates of waste printed circuit boards |
| WO2012093982A1 (en) | 2011-01-04 | 2012-07-12 | Донфар Инвэстмэнтс Лимитэд | Pyrolysis plant for processing carbonaceous feedstock |
| CN103143547A (en) * | 2013-02-07 | 2013-06-12 | 中国恩菲工程技术有限公司 | Incineration fly ash processing method |
| CN103831287A (en) * | 2014-03-13 | 2014-06-04 | 北京神雾环境能源科技集团股份有限公司 | Method for treating circuit board |
| CN103846272A (en) * | 2014-02-27 | 2014-06-11 | 广东工业大学 | Two-step debromination method for waste printed circuit board |
| TWI450773B (en) * | 2009-05-27 | 2014-09-01 | ||
| WO2015196688A1 (en) * | 2014-06-23 | 2015-12-30 | 北京建筑材料科学研究总院有限公司 | Method for oriented pyrolysis of combustible waste |
| CN105444178A (en) * | 2015-12-09 | 2016-03-30 | 张建臣 | Sundry-harmless pyrolyzing furnace |
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| CN105605580A (en) * | 2016-01-08 | 2016-05-25 | 史林芳 | Method and device for applying waste heat of solid waste incineration system to treatment of waste paint buckets |
| CN106944455A (en) * | 2017-02-27 | 2017-07-14 | 天津大学 | A kind of old circuit board fixed-bed pyrolysis system of high-temperature gas seepage flow heating |
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| CN108213061A (en) * | 2018-03-21 | 2018-06-29 | 天津大学 | A kind of vertical waste printed circuit board moving bed pyrolysis system |
| CN109654734A (en) * | 2019-03-01 | 2019-04-19 | 江苏国瑞特环保工程技术有限公司 | A kind of inorganic matter and oil mixture are pyrolyzed separated heating furnace |
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| CN113560319A (en) * | 2021-07-21 | 2021-10-29 | 中南大学 | Solvent gasification pyrolysis device and method for waste circuit board |
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2008
- 2008-10-31 CN CNA2008101527632A patent/CN101386015A/en active Pending
Cited By (27)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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