CN105728434A - Resourceful treatment method for waste circuit board - Google Patents
Resourceful treatment method for waste circuit board Download PDFInfo
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- CN105728434A CN105728434A CN201610110207.3A CN201610110207A CN105728434A CN 105728434 A CN105728434 A CN 105728434A CN 201610110207 A CN201610110207 A CN 201610110207A CN 105728434 A CN105728434 A CN 105728434A
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- flue gas
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- 238000000034 method Methods 0.000 title claims abstract description 58
- 239000002699 waste material Substances 0.000 title claims abstract description 30
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 76
- 239000003546 flue gas Substances 0.000 claims abstract description 76
- 229910052751 metal Inorganic materials 0.000 claims abstract description 33
- 239000002184 metal Substances 0.000 claims abstract description 33
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 30
- 238000003763 carbonization Methods 0.000 claims abstract description 25
- 239000000463 material Substances 0.000 claims abstract description 22
- 238000000926 separation method Methods 0.000 claims abstract description 19
- 238000004064 recycling Methods 0.000 claims abstract description 18
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 14
- 238000001179 sorption measurement Methods 0.000 claims abstract description 12
- 238000002485 combustion reaction Methods 0.000 claims abstract description 10
- 230000008569 process Effects 0.000 claims description 40
- 238000003672 processing method Methods 0.000 claims description 17
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 claims description 12
- 238000010791 quenching Methods 0.000 claims description 9
- 230000000171 quenching effect Effects 0.000 claims description 9
- 238000011084 recovery Methods 0.000 claims description 9
- 239000007921 spray Substances 0.000 claims description 8
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 claims description 6
- 239000000428 dust Substances 0.000 claims description 5
- 239000000843 powder Substances 0.000 claims description 5
- 239000002253 acid Substances 0.000 claims description 4
- 239000003517 fume Substances 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 4
- 238000012544 monitoring process Methods 0.000 claims description 3
- 239000000446 fuel Substances 0.000 claims description 2
- 230000008901 benefit Effects 0.000 abstract description 7
- 230000007613 environmental effect Effects 0.000 abstract description 5
- 229910052736 halogen Inorganic materials 0.000 abstract description 4
- 150000002367 halogens Chemical class 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 239000000203 mixture Substances 0.000 abstract description 3
- 229910052755 nonmetal Inorganic materials 0.000 abstract description 3
- 230000008929 regeneration Effects 0.000 abstract description 3
- 238000011069 regeneration method Methods 0.000 abstract description 3
- 239000000126 substance Substances 0.000 abstract description 3
- 150000002013 dioxins Chemical class 0.000 abstract 1
- 238000007712 rapid solidification Methods 0.000 abstract 1
- 238000012545 processing Methods 0.000 description 6
- 229910052737 gold Inorganic materials 0.000 description 5
- 239000010931 gold Substances 0.000 description 5
- 150000003839 salts Chemical class 0.000 description 5
- 239000003054 catalyst Substances 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 4
- 150000002739 metals Chemical class 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 239000003960 organic solvent Substances 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- 239000000758 substrate Substances 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 3
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 230000001698 pyrogenic effect Effects 0.000 description 2
- 238000000197 pyrolysis Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229910052793 cadmium Inorganic materials 0.000 description 1
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- 239000003500 flue dust Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000011133 lead Substances 0.000 description 1
- 238000007885 magnetic separation Methods 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000005554 pickling Methods 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
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
- B09B3/10—Destroying solid waste or transforming solid waste into something useful or harmless involving an adsorption step
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B5/00—Operations not covered by a single other subclass or by a single other group in this subclass
-
- 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]
Landscapes
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Processing Of Solid Wastes (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention discloses a resourceful treatment method for a waste circuit board. The resourceful treatment method comprises the process steps: carrying out crushing pretreatment of the waste circuit board, carbonization treatment of the waste circuit board, selective separation of carrying out flows including carbon-containing polymetallic materials, secondary combustion of flue gas, denitrification of the flue gas, rapid solidification treatment of the flue gas, deacidification treatment of the flue gas, adsorption treatment of the flue gas and collection and treatment of the flue gas; and finally respectively recovering a metal mixture and carbon powder, which are supplied for subsequent recycling. The resourceful treatment method has the following advantages that harms of dioxins and halogen substances can be fundamentally put an end, so that the environmental protection index is increased, and sanitary production of resource recycling the waste circuit board is realized; compared with other circuit board methods, the resourceful treatment method can fully utilize the heat energy of organic components in the waste circuit board, and the energy utilization ratio of the waste circuit board is increased; and metal and nonmetal in the waste circuit board are effectively separated from each other, regeneration recycling of resources is realized without secondary pollution, and the environmental, social and economic benefits are remarkable.
Description
Technical field
The present invention relates to waste and old resource secondary and utilize technical field, particularly to a kind of old circuit board recycling processing method.
Background technology
Printed substrate (Printedcircuitboard, PCB) is the important component part of electronic device, is widely used in electric equipment products.Waste printed circuit board contains the glass fibre of the metal of 20%-30%, the Organic substance of 25%-40%, 25%-35%, the resource being available with, content such as discarded notebook computer circuit board gold reaches 630 g ton, the content of waste mobile telephone circuit board gold, up to 1500 g ton, has significantly high recovery value；Simultaneously, the harmful substances such as heavy metal and halogen flame such as lead, cadmium, hydrargyrum bring very big difficulty also to the recycling of waste printed circuit board, if these materials can not be dealt carefully with, not only can cause environmental pollution, also will result in the serious waste of resource, old circuit board recycling treatment has become one of key technology of recycling of WEEE utilization.
Current old circuit board recycling technology mainly has: (1) physical mechanical facture, including broken and sorting etc.；(2) pyrogenic attack method, including burning, pyrolysis etc.；(3) wet treatment method, including pickling, corrosion etc..The recovery of part metals is had good effect by physicomechanical processes, but easily causes the waste of metals resources in metal and nonmetallic separation process poor effect.
At present, old circuit board processes and is typically with multiple method and combines old circuit board is carried out recycling treatment, there is handling process long, the problems such as metal recovery rate is low, and cost recovery is high.
Patent CN101905234A discloses a kind of waste printed circuit board comprehensive reutilization method, comprise the steps of waste printed circuit board and enter molten salt reaction stove after crushing, 700-900 DEG C of gasification, respectively obtain residue after gasifying and the gaseous product containing a large amount of tar, residue after gasifying is layered in fuse salt, discharge from the diverse location of molten salt reaction stove, be separately recovered utilization；Br in waste printed circuit board is cracked by alkali molten salt and absorbs；Gaseous product with oxygen-enriched air, water vapour by 1:(0.4 0.7): the ratio of (1 5) mixes and passes in air flow bed, reforms at 1,200 1500 DEG C, H in gas2/ CO ratio is between 0.8 2, and gaseous product is converted by high temperature.The method reaction temperature is high, severe reaction conditions, and equipment requirements is high, and alkali molten salt can not realize recycling, and processing cost is high.
Patent CN102671916A discloses a kind of waste printed circuit board and processes recovery process, this processing step mainly includes that waste material cutting, artificial separation, de-gold, detin, primary breakup, magnetic separation, secondary breakup, vibration sorting, pneumatic separation, pelletize be broken, gravity separation, mould the flow processs such as wooden compound, is finally separately recovered the materials such as gold, silver, aluminum, ferrum, stannum, copper, lead, plastics, resin.The method long flow path, energy consumption is high, and contained metal (gold, stannum) cannot be kept completely separate after processing by cleaved and artificial separation completely with substrate, causes that recovery rate of valuable metals is not high.
The processing method of a kind of old circuit board disclosed in patent CN104384168A, comprise following processing step: prepare organic solvent, prepare catalyst, old circuit board pretreatment, closes old circuit board granule with organic solvent, catalyst premixing, sends into reactor pyrolysis liquefaction, filter, solid-liquid separation, filtrate enters back into distillation system and is easily separated, and filter admittedly enters electrostatic branch system and separates.The method poor for applicability, circuit board substrate is of a great variety, composition differs, the composition requirements of organic solvent and catalyst is different, reach good solubility property relatively difficult, the addition of organic solvent and catalyst considerably increases the processing cost of old circuit board, industrialization production process technology poor stability, is unfavorable for commercial Application and popularization.
Summary of the invention
Present invention aims to the deficiencies in the prior art, it is provided that a kind of solve the problem of environmental pollution that old circuit board brings at two English etc. of pyrogenic attack process, it is achieved the resource of old circuit board, energy cleaning reclaim.
For solving above-mentioned technical problem, the technical scheme that the present invention proposes is:
A kind of old circuit board recycling processing method, comprises the following steps:
(1) broken pretreatment: form fritter wiring board waste material by broken for old circuit board；
(2) carbonization treatment: the fritter communicated band of wiring board waste material obtained for step (1) is delivered in carbide furnace and carries out carbonization treatment, obtain carbonization formed flue gas and from fritter wiring board waste material isolated carbon containing metal powder material；
(3) flue gas secondary combustion: adopt air-introduced machine to be drawn into secondary combustion chamber flue gas obtained for step (2) and fully burn, obtain without organic flue gas；
(4) Selective Separation: carbon containing metal powder material obtained for step (2) is carried out Selective Separation, many metal mixed material after being separated and carbon dust；
(5) denitrating flue gas processes: without organic flue gas, obtained for step (3) is carried out denitration process, obtains the flue gas of not nitrogen-containing oxide；
(6) flue gas quenching: the flue gas of not nitrogen-containing oxide obtained for step (5) is carried out quenching, makes the generation temperature range of two English less than 1 second；
(7) deacidifying flue gas processes: the flue gas of not nitrogen-containing oxide obtained for step (6) is carried out deacidification process, obtains the flue gas without acid；
(8) flue gas adsorption treatment: the flue gas without acid obtained for step (7) is carried out activated carbon adsorption and processes to adsorb minimal amount of two English in flue gas, obtain the flue gas that discharge index is up to standard；
(9) fume collection processes: be collected by flue gas obtained for step (8), and returns step (2) and carry out system circulation.
Further improvement as to technique scheme:
Preferably, in described step (1), single roll shaft disintegrating machine is adopted old circuit board to carry out break process to 20-30 millimeter.
Preferably, in described step (2), the temperature of described carbonization treatment is 350-850 DEG C, and carbonization time maintains 30-35 minute.
Preferably, in described step (3), the temperature of described secondary combustion chamber controls as 1100-1200 DEG C.
Preferably, in described step (5), what described denitration processed employing is that a kind of alkaline matter sprays, and by the removal of nitrogen oxide in flue gas, in subtractive process, flue-gas temperature is down to 850-900 DEG C.
Preferably, in described step (6), what described quenching adopted is that a kind of cold liquid sprays, and flue-gas temperature is down to 150-200 DEG C.
Preferably, in described step (7), it is spray deacidification through alkaline matter that described deacidification processes.
Preferably, in described step (8), described adsorption treatment is to process through activated carbon adsorption, absorbs minimal amount of two English in flue gas.
Preferably, described Selective Separation adopts electrostatic separation mode, and in the activated carbon material obtained, amount of metal scope is at 0.1-0.3%, and in many metal charges, metal recovery rate is at 99.6-99.9%.
Preferably, described carbide furnace is vertical cylinder, the opposite face of furnace wall is respectively mounted burner and temperature monitoring, the revolving bed keeping certain rotating speed it is provided with in carbide furnace, its centre rotational axis is positioned at the middle position of cylindrical carbide furnace, revolving bed is with multilamellar material containing dish, and carbonization treatment is to carry out on the top of revolving bed, and described burner is described revolving bed heat supply by the fuel that burns.
Compared with prior art, it is an advantage of the current invention that:
The recycling processing method of the old circuit board of the present invention, technique is simple, the technological processes such as flue gas quenching deacidifying flue gas process flue gas adsorption treatment fume collection process are processed by arranging broken pretreatment carbonization treatment Selective Separation flue gas secondary combustion denitrating flue gas, finally can be separately recovered metal mixed material and carbon dust, utilize for subsequent regeneration.It has the advantage that 1, flue gas is through techniques such as second-time burning, denitration, chilling, deacidification, absorption, can fundamentally stop the harm to environment of two English and halogen species, improve environmental protection index, realize the cleaning production that old circuit board resource reclaims, non-secondary pollution, environmental benefit, Social benefit and economic benefit are notable；2, compared with other wiring board processes, the heat energy of organic component in old circuit board can be made full use of, at utmost improve the energy utilization rate of old circuit board；3, the metal in old circuit board and non-metal kind material can be efficiently separated, it may be achieved the recycling processed continuously with valuable metals in waste circuit board of old circuit board, it is achieved the recycling utilization of resource.
Accompanying drawing explanation
Fig. 1 is the process chart of the processing method of a kind of old circuit board of the present invention.
Detailed description of the invention
For the ease of understanding the present invention, below in conjunction with Figure of description and preferred embodiment, the present invention is made more comprehensively, describes meticulously, but protection scope of the present invention is not limited to embodiment in detail below.
As shown in Figure 1, a kind of recycling processing method embodiment of the old circuit board of the present invention, processing step includes: old circuit board crushes pretreatment, old circuit board carbonization treatment, carbon containing many metal charges Selective Separation, flue gas secondary combustion, denitrating flue gas process, the process of flue gas quenching, deacidifying flue gas, flue gas adsorption treatment, the flow processs such as fume collection process, finally can be separately recovered metal mixed material and carbon dust, utilize for subsequent regeneration.Flue gas, through techniques such as second-time burning, denitration, chilling, deacidification, absorption, can efficiently separate the metal in old circuit board and non-metal kind material, make full use of the heat energy of organic component in old circuit board, at utmost improve the energy utilization rate of old circuit board；And fundamentally stop the harm to environment of two English and halogen species, improve environmental protection index, it is achieved the cleaning that old circuit board resource reclaims produces, non-secondary pollution, and realizes the recycling utilization of resource.
Specifically: waste and old printed substrate (such as waste computer wiring board or waste mobile phone wiring board) adopts single roll shaft disintegrating machine carry out the broken pretreatment fritter wiring board to granularity 20-30 millimeter, it is possible to significantly improve the carbonization efficiency of old circuit board subsequent process.Carbide furnace will be sent to through the broken pretreated communicated band of fritter wiring board again and carry out carbonization treatment.This carbide furnace is vertical cylinder, the opposite face of furnace wall is respectively mounted burner and temperature monitoring, the revolving bed keeping certain rotating speed it is provided with in carbide furnace, its centre rotational axis is positioned at the middle position of cylindrical carbide furnace, revolving bed is with multilamellar material containing dish, and broken pretreated fritter wiring board is delivered in the material containing dish on revolving bed top.In the present embodiment, burner adopts injection natural gas mode of heating to be revolving bed heat supply.It is to be inserted in carbide furnace from gun slot by spray gun, and characterizes carbonization in-furnace temperature by the temperature monitor in carbide furnace, is automatically adjusted natural gas flow, wiring board in stove is heated.Carbonization time is controlled by the rotating speed of revolving bed, carbonisation is maintained at the temperature of 350-850 DEG C to carry out, carbonization time maintains 30-35 minute, the carbonization optimum efficiency of old circuit board can be obtained with this understanding, carbonization treatment obtain flue gas and from fritter wiring board waste material isolated carbon containing metal powder material.The flue gas employing air-introduced machine that this carbonisation produces is drawn into secondary combustion chamber by the outlet at carbide furnace top and fully burns, and temperature during second-time burning is 1100-1200 DEG C, obtains without organic flue gas；The many metal charges of carbon containing that carbonisation produces are rotated the bottom to carbide furnace by revolving bed, and adopt electrostatic separation to carry out Selective Separation, being separated with many metal charges by carbon dust, in the activated carbon material obtained, amount of metal scope is at 0.1-0.3%, and in many metal charges, metal recovery rate is at 99.6-99.9%.
In the present embodiment, through secondary fully burn obtain adopt the injection of a kind of alkaline matter to carry out denitration process without organic flue gas, to decompose the nitrogen oxides in flue gas, in catabolic process, flue-gas temperature is down to 850-900 DEG C, and the nitrogen oxides in effluent index obtained meets discharge standard；The flue gas that temperature is 850-900 DEG C adopts cold liquid that flue gas is carried out quenching, and flue-gas temperature is down to 150-200 DEG C, makes the generation temperature range time of staying of two English less than 1 second；Through alkaline matter spray, the flue gas that flue-gas temperature is 150-200 DEG C is carried out deacidification process, and the acidic materials index in the flue gas obtained meets discharge standard；Through deacidification post processing flue gas through activated carbon adsorption process, to absorb minimal amount of two English in flue gas, in the flue gas finally given, indices meets discharge standard.And will be able to the flue gas of qualified discharge carry out taking out negative pressure, collect flue dust with cloth bag and return and in carbide furnace, carry out system circulation.
Claims (10)
1. an old circuit board recycling processing method, it is characterised in that comprise the following steps:
(1) broken pretreatment: form fritter wiring board waste material by broken for old circuit board；
(2) carbonization treatment: the fritter communicated band of wiring board waste material obtained for step (1) is delivered in carbide furnace and carries out carbonization treatment, obtain carbonization formed flue gas and from fritter wiring board waste material isolated carbon containing metal powder material；
(3) flue gas secondary combustion: adopt air-introduced machine to be drawn into secondary combustion chamber flue gas obtained for step (2) and fully burn, obtain without organic flue gas；
(4) Selective Separation: carbon containing metal powder material obtained for step (2) is carried out Selective Separation, many metal mixed material after being separated and carbon dust；
(5) denitrating flue gas processes: without organic flue gas, obtained for step (3) is carried out denitration process, obtains the flue gas of not nitrogen-containing oxide；
(6) flue gas quenching: the flue gas of not nitrogen-containing oxide obtained for step (5) is carried out quenching, makes the generation temperature range of two English less than 1 second；
(7) deacidifying flue gas processes: the flue gas of not nitrogen-containing oxide obtained for step (6) is carried out deacidification process, obtains the flue gas without acid；
(8) flue gas adsorption treatment: the flue gas without acid obtained for step (7) is carried out activated carbon adsorption and processes to adsorb minimal amount of two English in flue gas, obtain the flue gas that discharge index is up to standard；
(9) fume collection processes: flue gas obtained for step (8) carries out bag collection process, and returns step (2) and carry out system circulation.
2. processing method according to claim 1, it is characterised in that in described step (1), adopts single roll shaft disintegrating machine old circuit board to carry out break process to 20-30 millimeter.
3. processing method according to claim 1, it is characterised in that in described step (2), the temperature of described carbonization treatment is 350-850 DEG C, and carbonization time maintains 30-35 minute.
4. processing method according to claim 1, it is characterised in that in described step (3), the temperature of described secondary combustion chamber controls as 1100-1200 DEG C.
5. processing method according to claim 1, it is characterised in that in described step (5), what described denitration processed employing is that a kind of alkaline matter sprays, and by the removal of nitrogen oxide in flue gas, in subtractive process, flue-gas temperature is down to 850-900 DEG C.
6. processing method according to claim 1, it is characterised in that in described step (6), what described quenching adopted is that a kind of cold liquid sprays, and flue-gas temperature is down to 150-200 DEG C.
7. processing method according to claim 1, it is characterised in that in described step (7), it is spray deacidification through alkaline matter that described deacidification processes.
8. processing method according to claim 1, it is characterised in that in described step (8), described adsorption treatment is to process through activated carbon adsorption, absorbs minimal amount of two English in flue gas.
9. processing method according to claim 1, it is characterised in that described Selective Separation adopts electrostatic separation mode, and in the activated carbon material obtained, amount of metal scope is at 0.1-0.3%, and in many metal charges, metal recovery rate is at 99.6-99.9%.
10. processing method according to claim 1, it is characterized in that, described carbide furnace is vertical cylinder, the opposite face of furnace wall is respectively mounted burner and temperature monitoring, being provided with the revolving bed keeping certain rotating speed in carbide furnace, its centre rotational axis is positioned at the middle position of cylindrical carbide furnace, and revolving bed is with multilamellar material containing dish, carbonization treatment is to carry out on the top of revolving bed, and described burner is described revolving bed heat supply by the fuel that burns.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107441915A (en) * | 2017-07-31 | 2017-12-08 | 合肥国轩高科动力能源有限公司 | A kind of processing method of waste and old electrokinetic cell cracking waste gas |
| CN107623152A (en) * | 2017-10-26 | 2018-01-23 | 江西理工大学 | Applying waste lithium ionic electrokinetic cell resource recycle method |
| CN107866437A (en) * | 2017-11-23 | 2018-04-03 | 中南大学 | A kind of processing method of discarded circuit board pyrolysis recovery |
| CN107978815A (en) * | 2017-11-27 | 2018-05-01 | 淄博国利新电源科技有限公司 | The preprocess method of waste and old power battery |
| CN108160665A (en) * | 2017-12-14 | 2018-06-15 | 北京工业大学 | Useless integrated circuit board caloic collaboration green resource method |
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| CN107441915A (en) * | 2017-07-31 | 2017-12-08 | 合肥国轩高科动力能源有限公司 | A kind of processing method of waste and old electrokinetic cell cracking waste gas |
| CN107623152A (en) * | 2017-10-26 | 2018-01-23 | 江西理工大学 | Applying waste lithium ionic electrokinetic cell resource recycle method |
| CN107866437A (en) * | 2017-11-23 | 2018-04-03 | 中南大学 | A kind of processing method of discarded circuit board pyrolysis recovery |
| CN107978815A (en) * | 2017-11-27 | 2018-05-01 | 淄博国利新电源科技有限公司 | The preprocess method of waste and old power battery |
| CN108160665A (en) * | 2017-12-14 | 2018-06-15 | 北京工业大学 | Useless integrated circuit board caloic collaboration green resource method |
| WO2019114199A1 (en) * | 2017-12-14 | 2019-06-20 | 北京工业大学 | Caloric synergistic environment-friendly reclamation method for waste integrated circuit board |
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