CN103831287B - The method of process circuit plate - Google Patents
The method of process circuit plate Download PDFInfo
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- CN103831287B CN103831287B CN201410092213.1A CN201410092213A CN103831287B CN 103831287 B CN103831287 B CN 103831287B CN 201410092213 A CN201410092213 A CN 201410092213A CN 103831287 B CN103831287 B CN 103831287B
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- 238000000034 method Methods 0.000 title claims abstract description 106
- 230000008569 process Effects 0.000 title claims abstract description 67
- 238000000197 pyrolysis Methods 0.000 claims abstract description 115
- 239000007789 gas Substances 0.000 claims abstract description 87
- 238000012545 processing Methods 0.000 claims abstract description 74
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims abstract description 41
- 239000011701 zinc Substances 0.000 claims abstract description 41
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 41
- 238000001816 cooling Methods 0.000 claims abstract description 29
- 239000003517 fume Substances 0.000 claims abstract description 21
- 229910052751 metal Inorganic materials 0.000 claims abstract description 18
- 239000002184 metal Substances 0.000 claims abstract description 18
- 239000003365 glass fiber Substances 0.000 claims abstract description 14
- 239000000446 fuel Substances 0.000 claims abstract description 11
- 239000000203 mixture Substances 0.000 claims abstract description 10
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 8
- 238000002485 combustion reaction Methods 0.000 claims abstract description 8
- 229910052802 copper Inorganic materials 0.000 claims abstract description 8
- 239000010949 copper Substances 0.000 claims abstract description 8
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 9
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 6
- 239000008247 solid mixture Substances 0.000 claims description 6
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 3
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims description 3
- 239000000292 calcium oxide Substances 0.000 claims description 3
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 3
- 238000013467 fragmentation Methods 0.000 claims description 3
- 238000006062 fragmentation reaction Methods 0.000 claims description 3
- 238000004064 recycling Methods 0.000 abstract description 3
- 238000006243 chemical reaction Methods 0.000 description 35
- 239000003921 oil Substances 0.000 description 35
- 239000000463 material Substances 0.000 description 20
- 239000002994 raw material Substances 0.000 description 20
- 238000011084 recovery Methods 0.000 description 9
- 238000005979 thermal decomposition reaction Methods 0.000 description 9
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 7
- 239000000126 substance Substances 0.000 description 7
- 239000002699 waste material Substances 0.000 description 7
- 239000003546 flue gas Substances 0.000 description 6
- 239000002245 particle Substances 0.000 description 6
- 235000019580 granularity Nutrition 0.000 description 5
- 230000002378 acidificating effect Effects 0.000 description 4
- 230000002939 deleterious effect Effects 0.000 description 4
- 239000004744 fabric Substances 0.000 description 4
- 239000000295 fuel oil Substances 0.000 description 4
- 229910052736 halogen Inorganic materials 0.000 description 4
- 150000002367 halogens Chemical class 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000009835 boiling Methods 0.000 description 3
- 238000010924 continuous production Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 239000010793 electronic waste Substances 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 229920002521 macromolecule Polymers 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 239000000567 combustion gas Substances 0.000 description 2
- 239000002826 coolant Substances 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 229910052755 nonmetal Inorganic materials 0.000 description 2
- 150000002902 organometallic compounds Chemical class 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 230000035484 reaction time Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000011152 fibreglass Substances 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 238000005338 heat storage Methods 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
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- 238000005272 metallurgy Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 210000000952 spleen Anatomy 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000007158 vacuum pyrolysis Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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
- Y02W30/62—Plastics recycling; Rubber recycling
-
- 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)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a kind of method of process circuit plate, the method comprises: wiring board is carried out break process by (1); (2) wiring board through break process is carried out pyrolysis processing in radiant tube revolving bed, to obtain high-temperature oil gas, zinc fume and residue respectively, wherein, residue contains metal and inorganic glass fiber, radiant tube revolving bed has burner, and burner is the heat supply of described radiant tube revolving bed by combustion fuel; (3) high-temperature oil gas is carried out the first separating treatment, to obtain pyrolysis oil and pyrolysis gas respectively, and burner pyrolysis gas being supplied to radiant tube revolving bed is as fuel; (4) zinc fume is carried out the first cooling processing, to obtain metallic zinc; And residue is carried out the second separating treatment by (5), to obtain copper-containing metal mixture and inorganic glass fiber respectively.The recycling resource of wiring board and the maximum using of the energy can be realized according to the method for the process circuit plate of the embodiment of the present invention.
Description
Technical field
The invention belongs to chemical field, specifically, the present invention relates to a kind of method of process circuit plate.
Background technology
Along with the high speed development of science and technology, electronic product becomes the requisite daily necessities of people, and along with the continuous quickening of electronic product update speed, the leftover pieces formed in waste electronic refuse and electronic product machining process also grow with each passing day.In developed country as Japan, the U.S., European Union's electronic waste annual production account for 1%, 2 ~ 5% and 4% of municipal refuse respectively, and with the speed increment of every 5 years 16% ~ 28%, be 3-5 times of municipal refuse growth rate.This situation is particularly serious in China, and China is not only populous, and simultaneously or developed country dumps the main place of electronic waste, the electronic waste of the data display U.S. 80% exports to Asia, wherein 90% enters China.As the important component part of electronic product, the generation of waste printed circuit board also increases year by year.Waste printed circuit board is the mixture of glass fiber reinforced plastics and various metals, containing the metal of 40% of having an appointment, the macromolecular organic compound of 30% and 30% inorganic glass fiber, conduct oneself well if improper and put, not only can cause a large amount of losses of resource, and serious harm can be produced to environment.
At present, the technology recycled about useless circuit board both at home and abroad mainly comprises mechanical separation method, hydrometallurgical technology, biological metallurgy technology and pyrolytic technique, these technology major part except pyrolysis is all only paid close attention to and is reclaimed metal in waste printed circuit board but not metallorganic then landfill or burning, and the waste but also the environmental pollution that not only cause resource are serious.Pyrolytic technique by pyrolytic, effectively can utilize the macromolecule organic material in waste printed circuit board, is decomposed into fuel oil, combustion gas and carbide, is simultaneously also easily separated pyrolysis afterproduct, the metal in recovery train plate and glass fibre.But pyrolytic technique is also in the laboratory research stage mostly at present, is difficult to realize industrialization and large-scale production, simultaneously to recovery also many Footwall drift copper of subsequent metal, and have ignored the recovery of other metals.
Therefore, the method for existing process old circuit board needs to be studied further.
Summary of the invention
The present invention is intended to one of solve the problems of the technologies described above at least to a certain extent.For this reason, one object of the present invention is a kind of method proposing process circuit plate, and the method can realize the recycling resource of wiring board and the maximum using of the energy.
In one aspect of the invention, the present invention proposes a kind of method of process circuit plate, the method comprises:
(1) wiring board is carried out break process;
(2) wiring board through break process that step (1) obtains is carried out pyrolysis processing in radiant tube revolving bed, to obtain high-temperature oil gas, zinc fume and residue respectively, wherein, described residue contains metal and inorganic glass fiber, described radiant tube revolving bed has burner, and described burner is the heat supply of described radiant tube revolving bed by combustion fuel;
(3) the described high-temperature oil gas that step (2) obtains is carried out the first separating treatment, to obtain pyrolysis oil and pyrolysis gas respectively, and the burner described pyrolysis gas being supplied to described radiant tube revolving bed is as fuel;
(4) the described zinc fume that step (2) obtains is carried out the first cooling processing, to obtain metallic zinc; And
(5) step (2) the described residue that obtains is carried out the second separating treatment, to obtain copper-containing metal mixture and inorganic glass fiber respectively.
Method according to the process circuit plate of the embodiment of the present invention carries out pyrolysis processing by adopting radiant tube revolving bed, the continuous process of old circuit board can be realized, and adopt radiant tube radiant heat transfer, the pyrolysis gas produced is separated completely with flue gas, and fuel pyrolysis gas being used for pyrolysis processing process uses, thus significantly can reduce processing cost, simultaneously in pyrolysis processing process, both macromolecule organic can be obtained, the recovery of metallic zinc can be realized again, thus realize the maximum using of old circuit board recycling resource and the energy.
In addition, the method for process circuit plate according to the above embodiment of the present invention can also have following additional technical characteristic:
In some embodiments of the invention, in step (1), wiring board being carried out break process to granularity is 5 ~ 20 millimeters.Thus, the pyrolysis efficiency in old circuit board subsequent process can be significantly improved.
In some embodiments of the invention, described pyrolysis processing comprises further: wiring board is carried out the first pyrolysis processing in radiant tube revolving bed, to obtain described high-temperature oil gas and solid mixture respectively; And described solid mixture is carried out the second pyrolysis processing, to obtain described zinc fume and residue respectively.Thus, Footwall drift zinc again can be realized reclaiming while macromolecule organic.
In some embodiments of the invention, described first pyrolysis processing carries out 0.5 ~ 2 hour at the temperature of 600 ~ 850 degrees Celsius.Thus, the first pyrolysis efficiency can be significantly improved, so that later separation obtains the higher metallic zinc of purity.
In some embodiments of the invention, described second pyrolysis processing carries out 0.5 ~ 2 hour at the temperature of 900 ~ 950 degrees Celsius.Thus, the rate of recovery of metallic zinc can be significantly improved.
In some embodiments of the invention, in step (3), described first separating treatment comprises further: carry out the second cooling processing to described high-temperature oil gas; And adopt alkaline matter to carry out purified treatment to pyrolysis gas.Thus, the pyrolysis oil obtaining high-quality and pure pyrolysis gas can be separated.
In some embodiments of the invention, described second cooling processing is carried out at not higher than the temperature of 78 degrees Celsius.Thus, the separative efficiency of pyrolysis oil and pyrolysis gas can be significantly improved.
In some embodiments of the invention, described alkaline matter is selected from least one in NaOH, calcium oxide and calcium carbonate.Thus, halogen-containing gas such as deleterious acidic such as grade in pyrolysis gas can effectively be removed, pure pyrolysis gas can be obtained.
In some embodiments of the invention, in step (4), described first cooling processing is carried out at the temperature of 300 ~ 380 degrees Celsius.Thus, the rate of recovery of metallic zinc can be improved further.
In some embodiments of the invention, in step (5), described second separating treatment comprises further: carry out fragmentation to described residue and be separated with selection by winnowing.Thus, being effectively separated of copper-containing metal mixture and inorganic glass fiber can be realized.
Additional aspect of the present invention and advantage will part provide in the following description, and part will become obvious from the following description, or be recognized by practice of the present invention.
Accompanying drawing explanation
Above-mentioned and/or additional aspect of the present invention and advantage will become obvious and easy understand from accompanying drawing below combining to the description of embodiment, wherein:
Fig. 1 is the method flow schematic diagram of process circuit plate according to an embodiment of the invention;
Fig. 2 is the method flow schematic diagram of the process circuit plate according to another embodiment of the present invention;
Fig. 3 is the method flow schematic diagram of the process circuit plate according to another embodiment of the present invention.
Detailed description of the invention
Be described below in detail embodiments of the invention, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Be exemplary below by the embodiment be described with reference to the drawings, be intended to for explaining the present invention, and can not limitation of the present invention be interpreted as.
In describing the invention, it is to be appreciated that term " first ", " second " only for describing object, and can not be interpreted as instruction or hint relative importance or the implicit quantity indicating indicated technical characteristic.Thus, be limited with " first ", the feature of " second " can express or impliedly comprise one or more these features.In describing the invention, the implication of " multiple " is two or more, unless otherwise expressly limited specifically.
In one aspect of the invention, the present invention proposes a kind of method of process circuit plate.Method below with reference to the process circuit plate of Fig. 1-3 pairs of embodiment of the present invention is described in detail.According to embodiments of the invention, the method comprises:
S100: break process
According to embodiments of the invention, wiring board is carried out break process, thus the wiring board particle through break process can be obtained.According to embodiments of the invention, before break process is carried out to wiring board, first dismounting process is carried out to waste printed circuit board, removing electric capacity wherein, the electronic devices and components such as diode.According to embodiments of the invention, old circuit board can contain metal, glass fibre, resin and plastic etc.According to embodiments of the invention, the method for break process carried out to wiring board and is not particularly limited, according to a particular embodiment of the invention, disintegrating machine can be adopted to carry out break process to wiring board.According to embodiments of the invention, the granularity of the wiring board particle obtained also is not particularly limited, and according to a particular embodiment of the invention, the granularity of wiring board particle can be 5 ~ 20 millimeters.Inventor finds, the wiring board particle of this granularity can be laid on follow-up carrying out at the bottom of the rotary hearth furnace of pyrolysis processing uniformly, thus can significantly improve the pyrolysis efficiency of subsequent process.
S200: pyrolysis processing
According to embodiments of the invention, above-mentioned the obtained wiring board through break process is carried out pyrolysis processing, thus high-temperature oil gas, zinc fume and residue can be obtained respectively, according to a particular embodiment of the invention, in residue, metal and inorganic glass fiber can be comprised.According to embodiments of the invention, before the wiring board through break process is carried out pyrolysis processing, first by the wiring board through break process by Belt Conveying to batcher, controlling the thickness of feed layer of raw material by drapery panel is 100 ~ 500 millimeters.Inventor finds, the bed of material of this thickness range can thermally equivalent, and can significantly improve pyrolysis efficiency.
Be described in detail the pyrolysis processing process of the embodiment of the present invention below with reference to Fig. 2, according to embodiments of the invention, pyrolysis processing process can comprise:
S210: the first pyrolysis processing
According to embodiments of the invention, the first pyrolysis processing is carried out to the wiring board through break process, thus high-temperature oil gas and solid mixture can be obtained.According to embodiments of the invention, the condition of the first pyrolysis processing is also not particularly limited, and according to a particular embodiment of the invention, the first pyrolysis processing can carry out 0.5 ~ 2 hour at the temperature of 600 ~ 850 degrees Celsius.Inventor finds, first pyrolysis processing of carrying out under this condition significantly can be better than other condition and improve the first pyrolysis efficiency.
S220: the second pyrolysis processing
According to embodiments of the invention, the second pyrolysis processing is carried out to above-mentioned obtained solid mixture, thus zinc fume and residue can be obtained.According to embodiments of the invention, the condition of the second pyrolysis processing is also not particularly limited, and according to a particular embodiment of the invention, the second pyrolysis processing can carry out 0.5 ~ 2 hour at the temperature of 900 ~ 950 degrees Celsius.Inventor finds, second pyrolysis processing of carrying out under this condition significantly can be better than other condition and improve the second pyrolysis efficiency.
It should be noted that, the first pyrolysis processing and the second pyrolysis processing are all carried out in radiant tube revolving bed.According to embodiments of the invention, radiant tube revolving bed has the burner be arranged in radiant tube, and this burner is revolving bed heat supply by carrying out the pre-heat treatment after-combustion fuel to fuel.Particularly, the burner in radiant tube can be also heat-storage type burner, thus reaches energy-conservation effect.According to embodiments of the invention, carrying out in pyrolysis processing process, this revolving bed adopts radiant tube radiation heating, and its furnace roof and furnace wall maintain static, and furnace bottom drives material to rotate, thus carries out pyrolysis processing to wiring board.
Concrete, by flashboard, revolving bed is divided into reaction one district and reaction 2nd district, reacts a district and carry out the first pyrolysis processing, react 2nd district and carry out the second pyrolysis processing.First at the bottom of revolving burner, by material distributing machine, reaction one district is paved with material, controls reaction and carry out 0.5 ~ 2 hour under temperature is 600 ~ 850 degrees Celsius, and by being arranged at the multiple oil and gas pipes of furnace roof, produced oil gas is collected; Then open flashboard, started to the degree that material just can be made to pass through, at the bottom of revolving burner and cloth, until reaction one district and the reaction two uniform fulls with substance in district, close flashboard, the temperature controlling reaction two district is 900 ~ 950 degrees Celsius and carries out 0.5 ~ 2 hour.Now, react a district to react carry out simultaneously with reaction 2nd district, boiling point due to zinc is 907 degrees Celsius, therefore can generate zinc fume, partial thermal decomposition residual gas and residue in reaction two district, and zinc fume and partial thermal decomposition residual gas are collected by the discharge be arranged in 2nd district; Finally open flashboard to the degree that material just can be made to pass through, at the bottom of revolving burner, by residue by sealing screw discharging, simultaneous reactions one district continues the reaction that charging starts second round.
Inventor finds, radiant tube revolving bed is adopted to carry out pyrolysis processing to old circuit board, with adopted compared with vacuum pyrolysis stove in the past, significantly can reduce the requirement to equipment and process, and the continuous process of material can be realized, thus make it be easy to scale and industrialization, the thermal efficiency of this revolving bed burner can reach more than 85% simultaneously, and can the low-calorie combustion gas of smooth combustion, thus significantly can reduce the input of energy cost, flashboard is adopted revolving bed to be divided into reaction one district and reaction 2nd district in addition, the pyrolysis resource of non-metal organic compound in old circuit board and the recovery of metallic zinc can be realized in the same apparatus by the reaction temperature and reaction time that accurately control zones of different.
S300: the first separating treatment
According to embodiments of the invention, the high-temperature oil gas of collecting in above-mentioned steps is carried out the first separating treatment, thus pyrolysis oil and pyrolysis gas can be obtained respectively.Be described in detail the first separate processing step below with reference to Fig. 3, according to embodiments of the invention, the first separating treatment comprises:
S310: the second cooling processing
According to embodiments of the invention, the high-temperature oil gas of collection is carried out the second cooling processing, thus the pyrolysis oil of the liquid state in gas mixture can be separated with the pyrolysis gas of gaseous state, wherein, pyrolysis oil can be sold as fuel oil or chemical products.According to embodiments of the invention, carry out the condition of the second cooling processing and be not particularly limited high-temperature oil gas, according to a particular embodiment of the invention, the second cooling processing can be carried out being no more than at the temperature of 78 degrees Celsius.According to embodiments of the invention, the mode of the second cooling processing is also not particularly limited, according to a particular embodiment of the invention, mode that is direct-cooled and a cold combination can be adopted to carry out cooling processing to high-temperature oil gas, wherein, direct-cooled cooling medium is recycle oil aqueous mixtures, and a cold cooling medium is recirculated water.Inventor finds, the cooling processing of carrying out under this condition obviously can be better than the cooling effectiveness that other temperature improves high-temperature oil gas, thus can significantly improve the separative efficiency of pyrolysis oil and pyrolysis gas.
S320: purified treatment
According to embodiments of the invention, containing deleterious acidic gases such as halogens in the pyrolysis gas of cooling processing, therefore this pyrolysis gas is carried out purified treatment, pure pyrolysis gas can be obtained.According to embodiments of the invention, the concrete grammar of purified treatment is also not particularly limited, and according to a particular embodiment of the invention, alkaline matter can be adopted to carry out purified treatment to pyrolysis gas.According to embodiments of the invention, the particular type of the alkaline matter of employing is also not particularly limited, and according to a particular embodiment of the invention, alkaline matter can for being selected from least one in NaOH, calcium oxide and calcium carbonate.According to embodiments of the invention, the pure pyrolysis gas obtained is collected in air accumulator, and the burner this pyrolysis gas being supplied to radiant tube revolving bed uses as fuel, utilize radiant tube to carry out radiation heating to material, the pyrolysis gas that the flue gas that pyrolysis gas burning is produced and pyrolysis processing process produce is completely isolated simultaneously.Thus, can be separated and obtain purity and all higher pyrolysis gas of calorific value.According to embodiments of the invention, this pyrolysis gas can directly burn, and in the rear flue gas of burning, indices all meets discharge standard.Inventor finds, is used by the fuel of this pyrolysis gas as revolving bed pyrolysis processing process, can significantly improve efficiency of energy utilization, thus can obviously cut down finished cost.
S400: the first cooling processing
According to embodiments of the invention, the zinc fume of above-mentioned collection is carried out the first cooling processing, thus can metallic zinc be obtained.According to embodiments of the invention, zinc fume carries out the temperature of the first cooling processing and is not particularly limited, and according to a particular embodiment of the invention, the first cooling processing can be carried out at the temperature of 300 ~ 380 degrees Celsius.According to embodiments of the invention, containing partial thermal decomposition residual gas in the above-mentioned zinc fume collected, because the second pyrolysis processing temperature is higher than 900 degrees Celsius, pyrolysis residual gas is mainly containing the Small molecular such as hydrogen, carbon monoxide fuel gas, not containing pyrolysis oil, therefore can obtain pure metallic zinc and pyrolysis residual gas respectively through the first cooling processing, and pyrolysis residual gas remittance high-temperature oil gas collecting pipe is carried out post processing.Inventor finds, the cooling processing of carrying out in this temperature range obviously can be better than the cooling effectiveness that other temperature improves metallic zinc, thus can significantly improve the purity of metallic zinc.
S500: the second separating treatment
According to embodiments of the invention, residue above-mentioned steps obtained carries out the second separating treatment, thus can obtain copper-containing metal mixture and inorganic glass fiber respectively.According to embodiments of the invention, the mode of the second separating treatment carried out to residue and is not particularly limited, according to a particular embodiment of the invention, fragmentation can be carried out to obtained residue and be separated with selection by winnowing.
As mentioned above, can have according to the method for the process circuit plate of the embodiment of the present invention and be selected from following advantage one of at least:
Adopt radiant tube revolving bed as wiring board pyrolysis installation in method according to the process circuit plate of the embodiment of the present invention, the continuous process of material can be realized, and low to physical property requirements such as raw material granularities, and cloth is even, fast by thermal velocity, be easy to realize scale and industrialization;
Adopt flashboard that revolving bed is divided into reaction one district and reaction 2nd district according to the method for the process circuit plate of the embodiment of the present invention, can realize the pyrolysis resource of non-metal organic compound in old circuit board and the recovery of metallic zinc in the same apparatus by the reaction temperature and reaction time that accurately control zones of different, process is simple, flow process is short, the rate of recovery of zinc is high;
Utilize radiant tube to carry out radiant heat transfer to material according to the method for the process circuit plate of the embodiment of the present invention, flue gas and the pyrolysis gas of generation are completely isolated, such that pyrolysis gas quality is pure, calorific value is high, are convenient to recycle;
Method according to the process circuit plate of the embodiment of the present invention is vented one's spleen as pyrolysis processing provides energy with the combustion heat, can significantly improve efficiency of energy utilization, thus improves economy and the resource level of technique.
Below with reference to specific embodiment, present invention is described, it should be noted that, these embodiments are only descriptive, and do not limit the present invention in any way.
Embodiment 1
Adopt the old circuit board through dismounting electric elements to be raw material, be placed in disintegrating machine and carry out break process, being crushed to particle diameter is 5-20mm; By the wiring board raw material through break process by Belt Conveying to batcher, enter feeding system, control the thickness of feed layer of raw material by drapery panel; At the bottom of revolving burner, by material distributing machine, reaction one district is paved with material, thickness of feed layer is 100 ~ 500 millimeters, controls reaction and carry out 0.5 ~ 2 hour under temperature is 750 degrees Celsius, and collect produced oil gas by being arranged at the multiple oil and gas pipes of furnace roof; Then open flashboard, started to the degree that material just can be made to pass through, at the bottom of revolving burner and cloth, until reaction one district and the reaction two uniform fulls with substance in district, close flashboard, the temperature controlling reaction two district is 950 degrees Celsius and carries out 0.5 ~ 2 hour.Now, react a district to react carry out simultaneously with reaction 2nd district, boiling point due to zinc is 907 degrees Celsius, therefore can generate zinc fume, partial thermal decomposition residual gas and residue in reaction two district, and zinc fume and partial thermal decomposition residual gas are collected by the discharge be arranged in 2nd district; Finally open flashboard to the degree that material just can be made to pass through, at the bottom of revolving burner, by residue by sealing screw discharging, simultaneous reactions one district continues the reaction that charging starts second round.And the high-temperature oil gas of collection is carried out cooling processing, obtain pyrolysis oil (accounting for the 19wt% of raw material) and pyrolysis gas (accounting for the 14wt% of raw material), and adopt alkaline matter to absorb the deleterious acidic gases such as the halogen in pyrolysis gas, obtain pure pyrolysis gas, this pyrolysis gas can directly burn, after burning, in flue gas, indices all meets discharge standard, and the pyrolysis oil obtained is sold as fuel oil or chemical products after collecting; Pyrolysis gas through purified treatment is collected in air accumulator, is connected with radiant tube burner by press device, in radiant tube combustion for pyrolysis processing process provides heat; Obtained zinc fume is carried out cooling processing under 350 degrees Celsius, thus can be separated and obtain pure metallic zinc and (account for the 3.5wt% of raw material, purity is more than 99%) and partial thermal decomposition residual gas (accounting for the 2wt% of raw material), and pyrolysis residual gas is imported high-temperature oil gas collecting pipe; Finally separating treatment is carried out to residue, obtain copper-containing metal mixture (accounting for the 28.5wt% of raw material) and inorganic glass fiber (accounting for the 12wt% of raw material).
Embodiment 2
Adopt the old circuit board through dismounting electric elements to be raw material, be placed in disintegrating machine and carry out break process, being crushed to particle diameter is 5-20mm; By the wiring board raw material through break process by Belt Conveying to batcher, enter feeding system, control the thickness of feed layer of raw material by drapery panel; At the bottom of revolving burner, by material distributing machine, reaction one district is paved with material, thickness of feed layer is 100 ~ 500 millimeters, controls reaction and carry out 0.5 ~ 2 hour under temperature is 650 degrees Celsius, and collect produced oil gas by being arranged at the multiple oil and gas pipes of furnace roof; Then open flashboard, started to the degree that material just can be made to pass through, at the bottom of revolving burner and cloth, until reaction one district and the reaction two uniform fulls with substance in district, close flashboard, the temperature controlling reaction two district is 930 degrees Celsius and carries out 0.5 ~ 2 hour.Now, react a district to react carry out simultaneously with reaction 2nd district, boiling point due to zinc is 907 degrees Celsius, therefore can generate zinc fume, partial thermal decomposition residual gas and residue in reaction two district, and zinc fume and partial thermal decomposition residual gas are collected by the discharge be arranged in 2nd district; Finally open flashboard to the degree that material just can be made to pass through, at the bottom of revolving burner, by residue by sealing screw discharging, simultaneous reactions one district continues the reaction that charging starts second round.And the high-temperature oil gas of collection is carried out cooling processing, obtain pyrolysis oil (accounting for the 21wt% of raw material) and pyrolysis gas (accounting for the 15wt% of raw material), and adopt alkaline matter to absorb the deleterious acidic gases such as the halogen in pyrolysis gas, obtain pure pyrolysis gas, this pyrolysis gas can directly burn, after burning, in flue gas, indices all meets discharge standard, and the pyrolysis oil obtained is sold as fuel oil or chemical products after collecting; Pyrolysis gas through purified treatment is collected in air accumulator, is connected with radiant tube burner by press device, in radiant tube combustion for pyrolysis processing process provides heat; Obtained zinc fume is carried out cooling processing under 360 degrees Celsius, thus can be separated and obtain pure metallic zinc and (account for the 2.8wt% of raw material, purity is more than 99%) and partial thermal decomposition residual gas (accounting for the 1.5wt% of raw material), and pyrolysis residual gas is imported high-temperature oil gas collecting pipe; Finally separating treatment is carried out to residue, obtain copper-containing metal mixture (accounting for the 31wt% of raw material) and inorganic glass fiber (accounting for the 11wt% of raw material).
In the description of this description, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present invention or example.In this manual, identical embodiment or example are not necessarily referred to the schematic representation of above-mentioned term.And the specific features of description, structure, material or feature can combine in an appropriate manner in any one or more embodiment or example.
Although illustrate and describe embodiments of the invention above, be understandable that, above-described embodiment is exemplary, can not be interpreted as limitation of the present invention, those of ordinary skill in the art can change above-described embodiment within the scope of the invention when not departing from principle of the present invention and aim, revising, replacing and modification.
Claims (10)
1. a method for process circuit plate, is characterized in that, comprising:
(1) wiring board is carried out break process;
(2) wiring board through break process that step (1) obtains is carried out pyrolysis processing in radiant tube revolving bed, to obtain high-temperature oil gas, zinc fume and residue respectively, wherein, described residue contains metal and inorganic glass fiber, described radiant tube revolving bed has burner, and described burner is the heat supply of described radiant tube revolving bed by combustion fuel;
(3) the described high-temperature oil gas that step (2) obtains is carried out the first separating treatment, to obtain pyrolysis oil and pyrolysis gas respectively, and the burner described pyrolysis gas being supplied to described radiant tube revolving bed is as fuel;
(4) the described zinc fume that step (2) obtains is carried out the first cooling processing, to obtain metallic zinc; And
(5) step (2) the described residue that obtains is carried out the second separating treatment, to obtain copper-containing metal mixture and inorganic glass fiber respectively.
2. the method for process circuit plate according to claim 1, is characterized in that, in step (1), wiring board being carried out break process to granularity is 5 ~ 20 millimeters.
3. the method for process circuit plate according to claim 1, is characterized in that, in step (2), described pyrolysis processing comprises further:
Wiring board is carried out the first pyrolysis processing in radiant tube revolving bed, to obtain described high-temperature oil gas and solid mixture respectively; And
Described solid mixture is carried out the second pyrolysis processing, to obtain described zinc fume and residue respectively.
4. the method for process circuit plate according to claim 3, is characterized in that, described first pyrolysis processing carries out 0.5 ~ 2 hour at the temperature of 600 ~ 850 degrees Celsius.
5. the method for process circuit plate according to claim 3, is characterized in that, described second pyrolysis processing carries out 0.5 ~ 2 hour at the temperature of 900 ~ 950 degrees Celsius.
6. the method for process circuit plate according to claim 1, is characterized in that, in step (3), described first separating treatment comprises further:
Second cooling processing is carried out to described high-temperature oil gas; And
Alkaline matter is adopted to carry out purified treatment to pyrolysis gas.
7. the method for process circuit plate according to claim 6, is characterized in that, described second cooling processing is carried out at not higher than the temperature of 78 degrees Celsius.
8. the method for process circuit plate according to claim 6, is characterized in that, described alkaline matter is selected from least one in NaOH, calcium oxide and calcium carbonate.
9. the method for process circuit plate according to claim 1, is characterized in that, in step (4), described first cooling processing is carried out at the temperature of 300 ~ 380 degrees Celsius.
10. the method for process circuit plate according to claim 1, is characterized in that, in step (5), described second separating treatment comprises further: carry out fragmentation to described residue and be separated with selection by winnowing.
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| CN104624611B (en) * | 2015-01-23 | 2016-06-22 | 长沙紫宸科技开发有限公司 | A kind of discarded appliance circuit plate energy method for innocent treatment |
| CN106623340B (en) * | 2015-10-28 | 2020-06-16 | 荆门市格林美新材料有限公司 | Waste circuit board cracking process and cracking device |
| US9850433B2 (en) | 2015-12-31 | 2017-12-26 | Chz Technologies, Llc | Multistage thermolysis method for safe and efficient conversion of E-waste materials |
| CN105509062B (en) * | 2016-01-20 | 2017-07-07 | 南京工业大学 | Full size electronic apparatus discarded object continuous pyrolysis incinerator |
| CN105817461B (en) * | 2016-03-23 | 2019-01-25 | 中山大学 | A kind of device of waste and old circuit board electronic component high added value recycling |
| CN107470317B (en) * | 2017-06-15 | 2020-01-14 | 广东环境保护工程职业学院 | Method for debrominating and lightening pyrolysis oil of waste circuit board |
| CN107326184A (en) * | 2017-07-03 | 2017-11-07 | 北京神源环保有限公司 | A kind of system and method for reclaiming copper foil in useless copper-clad plate |
| US10640711B2 (en) | 2018-06-05 | 2020-05-05 | Chz Technologies, Llc | Multistage thermolysis method for safe and efficient conversion of treated wood waste sources |
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