CN102284471B - Method for automatically dismantling and recovering waste printed circuit board by using industrial exhaust heat - Google Patents
Method for automatically dismantling and recovering waste printed circuit board by using industrial exhaust heat Download PDFInfo
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- CN102284471B CN102284471B CN201110233656.4A CN201110233656A CN102284471B CN 102284471 B CN102284471 B CN 102284471B CN 201110233656 A CN201110233656 A CN 201110233656A CN 102284471 B CN102284471 B CN 102284471B
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- printed circuit
- superheated steam
- circuit boards
- exhaust heat
- circuit board
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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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- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a method for automatically dismantling and recovering electronic components on a waste printed circuit board by using industrial exhaust heat, which comprises the steps of: preparing low-grade superheated steam by using industrial exhaust heat through an exhaust heat boiler, and automatically dismantling electronic components on the waste printed circuit board by using the superheated steam as a heat source and power through superheated steam high-temperature pulse injection; properly treating the used superheated steam through a condensing device, and returning to the exhaust heat boiler for recycling; and collecting the gas generated during the operation by using a non-condensable gas collecting device, and properly treating and then directly emitting. According to the invention, the electronic components on the waste printed circuit board are automatically dismantled and recovered by using the superheated steam prepared by using the industrial exhaust gas as the heat source and power, the industrial exhaust heat and the waste printed circuit board are recycled, a low-carbon environmental-protection rule is met, and remarkable social, economic and environmental benefits are obtained.
Description
Technical field
The present invention relates to a kind of method that on discarded printed circuit boards, electronic devices and components automatic dismantling reclaims, belong to Process of Disposal of Electronic Waste comprehensive utilization technique field.
Background technology
Along with the fast development of scientific and technological development, particularly high and new technology, the speed that electronic product updates is constantly accelerated, and circuit board is as part indispensable in electronic product, and its discarded amount grows with each passing day especially.According to statistics, global electron wastes, with 18% speed increment, becomes fastest-rising rubbish.Data demonstration, the electron wastes that current whole Europe produces is 600-800 ten thousand t, the electron wastes of the U.S. accounts for the 2%-5% of the whole America quantity of refuse.And China, from 2004, has at least 5,000,000 computers, 5,000,000 television sets, 5,000 ten thousand mobile phones, 5,000,000 washing machines, 4,000,000 refrigerators to enter the date of retirement every year, and the amount of consequent discarded printed circuit boards is also very huge.
Discarded printed circuit boards, as special solid waste, on the one hand, contains various heavy and other harmful substances in discarded printed circuit boards, it is danger wastes, if dealt with improperly, will work the mischief to the mankind and ecological environment; On the other hand, in discarded printed circuit boards, comprise again many valuable resources, if it is rationally utilized, will produce very large economic worth.
According to statistics, the normal service life of electronic devices and components is 500,000 hours, and be only about 20,000 hours the average life that is attached to the electronic devices and components of discarded printed circuit boards.Therefore, how not damage under the prerequisite of electronic devices and components, low cost, carry out on a large scale discarded printed circuit boards automatic dismantling reclaim, reduce the pollution of electron wastes to environment simultaneously, for making full use of a large amount of electron wastes, reduce environmental pollution, the saving energy and resource tool and be of great significance.
At present, the dismounting of discarded printed circuit boards is mainly contained to physics, two kinds of methods of chemistry.Physical method as taking liquid (as diesel oil) as add thermal medium, directly with the scolder of melting for adding thermal medium, utilize infrared heating, directly heating on iron plate, be heated that inequality, the electronic devices and components rate of recovery are low, generation secondary pollution problems but this several method all inevitably can produce discarded printed circuit boards.Therefore, in the urgent need to developing a kind of new green environment protection electronic devices and components automatic dismantling method on discarded printed circuit boards safely and efficiently.
Summary of the invention
The object of the invention is to overcome the deficiency of prior art, propose a kind of method that efficiency is high, pollute electronic devices and components on the automatic dismantling recovery discarded printed circuit boards little, energy consumption is low.
Technical scheme of the present invention is:
Utilize industrial exhaust heat automatic dismantling to reclaim a method for electronic devices and components on discarded printed circuit boards, in turn include the following steps:
A, utilize industrial exhaust heat (as flue gas) to prepare Low grade superheated steam by waste heat boiler;
B, again taking superheated steam as thermal source with power, be the automatic dismantling that high temperature pulse winding-up realizes electronic components of waste printed circuit board by superheated steam; Discarded printed circuit boards, after superheated steam preheating, is realized the automatic dismantling of its circuit board electronic devices and components through high temperature pulse winding-up, finally realize classification the automatic recovery by screening;
Superheated steam after C, work is by condensing unit, and condensed water, through suitably processing and be back to waste heat boiler, recycles;
After the gas producing in D, running utilizes incoagulable gas gathering-device to collect, then through suitably processing directly discharge.
Low grade superheated steam refer to pressure in 0.3-0.5MPa/ temperature the superheated steam below 300 DEG C.
Preheating is to utilize cryogenic overheating steam that discarded printed circuit boards is heated to 150-200 DEG C.
High temperature pulse winding-up is to pass through jet pipe, utilize hyperthermia and superheating steam that discarded printed circuit boards is heated to a higher temperature (200-300 DEG C), carry out the pulse jet of superheated steam by nozzle simultaneously, make described discarded printed circuit boards produce vibration, thereby realize the automatic dismantling of electronic devices and components on discarded printed circuit boards.
Electronic devices and components automatic dismantling recovery method on a kind of electronic components of waste printed circuit board that the present invention proposes, its advantage is as follows:
1, realize the efficient separation and classification recovery of electronic devices and components, discarded printed circuit substrate, scolder with the method low cost of superheated steam heating, HTHP pulse steam blast.
2, with superheated steam for adding thermal medium, ensured being heated evenly of the each component of discarded printed circuit boards.
3,, in heating process, water vapour can not cause damage to discarded printed circuit boards and electronic devices and components thereof.
4, all processes of the present invention is realized closed circulation, does not produce any secondary pollution in running, and energy consumption is low, and economic benefit is high, is applicable to the large-scale recovery of discarded printed circuit boards.
5, superheated steam used in the present invention produces taking industrial exhaust heat (as flue gas) as heat energy; not only greatly save and should heat the energy providing for superheated steam; and effectively reduce the thermal pollution of industrial exhaust heat; really accomplished the reasonable recycling of the energy, this not only meets the policy of national energy-saving reduction of discharging but also environmental protection has been played to positive role.
The present invention is taking superheated steam as heating source, and realize discarded printed circuit boards with superheated steam by pulse jet and separate with the vibration of its electronic devices and components, adopt hermetically sealed design, avoid, in its electronic devices and components high temperature unloading process of discarded printed circuit boards, environment is caused to secondary pollution, realized discarded printed circuit boards and separated with the innoxious automatic dismantling of its electronic devices and components.
Brief description of the drawings
Fig. 1 is process chart of the present invention.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is described in detail.
Be illustrated in figure 1 process chart of the present invention.
Be used for heating waste heat boiler 2 from the industrial exhaust heat of flue 1, the superheated steam that waste heat boiler 2 produces is as thermal source and power, by steam operating conditions assembly 3, enter preheating chamber 4, at preheating chamber 4, discarded printed circuit boards is carried out after preheating, superheated steam enters high temperature pulse detaching chamber, jets through high temperature pulse by nozzle, the electronic devices and components of circuit board are disassembled from circuit board, after screening, realize classification the automatic recovery;
Superheated steam after work enters header tank 8 through cooling water purification apparatus 7 after by condenser 6, is back to waste heat boiler 2 by feed pump 11, recycles; After the gas producing in running utilizes incoagulable gas collector 9 to collect, more directly discharge after air cleaning unit 10 is processed.
Should be understood that, for those of ordinary skills, can be improved according to the above description or convert, and all these improvement and conversion all should belong to the protection domain of claims of the present invention.
Claims (1)
1. utilize industrial exhaust heat automatic dismantling to reclaim a method for electronic devices and components on discarded printed circuit boards, it is characterized in that in turn including the following steps:
A, utilize industrial exhaust heat to prepare Low grade superheated steam by waste heat boiler; Described Low grade superheated steam refers to that pressure is at 0.3-0.5MPa, the superheated steam of temperature below 300 DEG C;
B, again taking superheated steam as thermal source with power, at preheating chamber, discarded printed circuit boards is carried out after preheating, superheated steam enters high temperature pulse detaching chamber, jets through high temperature pulse by nozzle, the electronic devices and components of circuit board are disassembled from circuit board, after screening, realize classification the automatic recovery; Described preheating is to utilize superheated steam that discarded printed circuit boards is heated to 150-200 DEG C; Described high temperature pulse winding-up is to pass through jet pipe, utilize hyperthermia and superheating steam that discarded printed circuit boards is heated to 200-300 DEG C, carry out the pulse jet of superheated steam by nozzle simultaneously, make described discarded printed circuit boards produce vibration, thereby realize the automatic dismantling of electronic devices and components on discarded printed circuit boards;
Superheated steam after C, work enters header tank through cooling water purification apparatus after by condenser, is back to waste heat boiler by feed pump, recycles;
After the gas producing in D, running utilizes incoagulable gas collector to collect, more directly discharge after air cleaning unit is processed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110233656.4A CN102284471B (en) | 2011-08-16 | 2011-08-16 | Method for automatically dismantling and recovering waste printed circuit board by using industrial exhaust heat |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110233656.4A CN102284471B (en) | 2011-08-16 | 2011-08-16 | Method for automatically dismantling and recovering waste printed circuit board by using industrial exhaust heat |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102284471A CN102284471A (en) | 2011-12-21 |
| CN102284471B true CN102284471B (en) | 2014-10-01 |
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| CN201110233656.4A Expired - Fee Related CN102284471B (en) | 2011-08-16 | 2011-08-16 | Method for automatically dismantling and recovering waste printed circuit board by using industrial exhaust heat |
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| CN (1) | CN102284471B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102554387A (en) * | 2012-01-16 | 2012-07-11 | 西南科技大学 | Method for automatically dismounting electronic device on abandoned printed circuit board by using industrial waste gas |
| CN103599921A (en) * | 2013-11-19 | 2014-02-26 | 西南科技大学 | Automatic lossless dismounting recovery method and automatic lossless dismounting recovery device of discarded printed circuit board |
| CN103949316B (en) * | 2014-04-09 | 2016-08-31 | 西南科技大学 | A kind of method utilizing industrial exhaust heat superfine grinding drying brown coal and collection volatile matter |
| CN104070050B (en) * | 2014-06-18 | 2016-01-20 | 华南理工大学 | High-pressure natural gas pressure energy is utilized to reclaim technique and the device of waste and old PCB |
| CN106813392A (en) * | 2017-02-22 | 2017-06-09 | 江苏博敏电子有限公司 | A kind of steam-heating system for the heating of PCB horizontal lines |
Citations (8)
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|---|---|---|---|---|
| WO1996023616A1 (en) * | 1995-02-02 | 1996-08-08 | Jacks' Technologies And Industries, Incorporated | Attaching components and reworking circuit boards |
| DE19511041A1 (en) * | 1995-03-25 | 1996-09-26 | Thomas Schwarz | De-soldering of circuit boards with electronic components |
| WO2002042016A1 (en) * | 2000-11-27 | 2002-05-30 | Maxgain Co Ltd | Method of processing printed board scrap and apparatus for the same |
| CN101014227A (en) * | 2007-02-02 | 2007-08-08 | 清华大学 | Method and equipment for disassembling circuit board using contacted impact |
| CN101417358A (en) * | 2008-11-26 | 2009-04-29 | 四川长虹电器股份有限公司 | Circuit board element dismounting device |
| CN101654343A (en) * | 2008-08-22 | 2010-02-24 | 陈海焱 | Method for preparing microfine mineral admixture by using waste heat of kiln |
| CN102107308A (en) * | 2010-11-26 | 2011-06-29 | 清华大学 | Method for disassembling and modifying printed circuit board based on high temperature steam |
| CN102138370A (en) * | 2008-09-03 | 2011-07-27 | 新热工业株式会社 | Electric appliance disassembling method, and electric appliance disassembling device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0983129A (en) * | 1995-09-08 | 1997-03-28 | Ishikawajima Harima Heavy Ind Co Ltd | Apparatus for recycling mounted board |
-
2011
- 2011-08-16 CN CN201110233656.4A patent/CN102284471B/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996023616A1 (en) * | 1995-02-02 | 1996-08-08 | Jacks' Technologies And Industries, Incorporated | Attaching components and reworking circuit boards |
| DE19511041A1 (en) * | 1995-03-25 | 1996-09-26 | Thomas Schwarz | De-soldering of circuit boards with electronic components |
| WO2002042016A1 (en) * | 2000-11-27 | 2002-05-30 | Maxgain Co Ltd | Method of processing printed board scrap and apparatus for the same |
| CN101014227A (en) * | 2007-02-02 | 2007-08-08 | 清华大学 | Method and equipment for disassembling circuit board using contacted impact |
| CN101654343A (en) * | 2008-08-22 | 2010-02-24 | 陈海焱 | Method for preparing microfine mineral admixture by using waste heat of kiln |
| CN102138370A (en) * | 2008-09-03 | 2011-07-27 | 新热工业株式会社 | Electric appliance disassembling method, and electric appliance disassembling device |
| CN101417358A (en) * | 2008-11-26 | 2009-04-29 | 四川长虹电器股份有限公司 | Circuit board element dismounting device |
| CN102107308A (en) * | 2010-11-26 | 2011-06-29 | 清华大学 | Method for disassembling and modifying printed circuit board based on high temperature steam |
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| Publication number | Publication date |
|---|---|
| CN102284471A (en) | 2011-12-21 |
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Application publication date: 20111221 Assignee: Mianyang Liuneng Powder Equipment Co., Ltd. Assignor: Southwest University of Science and Technology Contract record no.: 2015510000052 Denomination of invention: Method for automatically dismantling and recovering waste printed circuit board by using industrial exhaust heat Granted publication date: 20141001 License type: Exclusive License Record date: 20150528 |
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