CN207787253U - A kind of system of old circuit board Pyrolyzation and debromination processing - Google Patents
A kind of system of old circuit board Pyrolyzation and debromination processing Download PDFInfo
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- CN207787253U CN207787253U CN201721633804.0U CN201721633804U CN207787253U CN 207787253 U CN207787253 U CN 207787253U CN 201721633804 U CN201721633804 U CN 201721633804U CN 207787253 U CN207787253 U CN 207787253U
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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]
Abstract
The utility model is related to a kind of systems of old circuit board Pyrolyzation and debromination processing, including knockout tower, crusher, mixer, rotary kiln, roto-siofter, gas-solid separator, centrifuge, heating furnace and collection tower.The utility model does solid thermal carriers using metal oxide and is sufficiently mixed with old circuit board, and the Br of pyrolytic reaction generation is absorbed using metal oxide such as iron oxide, copper oxide etc.2, the substances such as HBr, to effectively remove halides in old circuit board, generating metal bromate salt dissolving prevents it to the corrosion of equipment and the influence of tar.
Description
Technical field
The utility model is related to field of solid waste disposal, more particularly, to a kind of processing of old circuit board Pyrolyzation and debromination
System.
Background technology
Old circuit board is by household electrical appliance such as various waste computers, communication apparatus, television set and refrigerators and to eliminate
A kind of solid waste for generating of precision electronic device instrument etc..China is electronic apparatus production and consumption big country, in recent years electronics
The old circuit board quantity that electric appliance generates then increases in geometry multiple.On the other hand, China is as wiring board system the biggest in the world
Producing country is made, the waste material generated in production process reaches the 30% of total amount, is one of discarded circuit board important sources.
Many research institutions are recycled old circuit board both at home and abroad at present and recycling recycling has carried out widely
Research, the recycling treatment process technology of use mainly have mechanical physical processing techniques, hydrometallurgy, biological treatment, overcritical
Fluid processing, heat treatment etc..Mechanical-physical treatment technology makes metal component be filled with nonmetallic ingredient using the method for Mechanical Crushing
It decomposes from then utilizing gravity separation, the methods of magnetic separation separation metal component, there is that energy consumption is big, and break process technique generates big
Measure dust, the shortcomings of crushing effect is undesirable.Hydrometallurgy basic principle is by the metal in useless circuit board in acid or alkalinity
Under the conditions of leach, metal and other materials are separated and are recycled from liquid phase, but can not be organic in recovery train plate
Object, and water consumption is big, the waste water of generation causes environmental pollution.In numerous treatment process, it is pyrolyzed as a kind of newer scrap wire
Road plate treatment technology can make the resin-bonded layer in waste printed circuit board decompose, and weaken the binding force between metal and non-metallic layer,
To realize the efficient dissociation of metal and non-metallic layer；In addition, the pyrolysis gas and pyrolysis oil that are generated in pyrolytic process can be used as combustion
Gas or industrial chemicals reuse can effectively avoid the pollutions such as bioxin generation.
Traditional pyrolysis processing technique is primarily present two problems：1, because wiring board thermal conductivity is bad, furnace heat transfer effect
Rate is low, causes high energy consumption, treatment effeciency not high.2, it had been pyrolyzed in wiring board there are a large amount of halides are contained inside fire retardant
Cheng Zhonghui generates the poisonous and harmful substances such as more shielding smog, simple substance bromine and hydrogen bromide, brominated phenol.These substances are not only right
Environment causes serious harm difficult to the appraisal, can also corrosion treatment equipment, reduce finished product oil quality.Therefore it needs to consider new give up
Old wiring board pyrolysis processing technique as far as possible removes the bromide that wiring board pyrolysis generates while improving pyrolysis efficiency,
To avoid the corrosion to reacting equipment, the influence to later stage oil product is eliminated.
It is pyrolyzed in the prior art using fluid bed process, there is the big operating procedure complexity of energy consumption, waste plastics pyrolysis production
Raw fusant is easily adhered to each other with fluidized bed material quartz sand, is had an impact to technique normal operation.And bromide fire retardant
It is that the inorganic gas such as hydrogen bromide, bromine easily cause to corrode to equipment mainly to be generated in pyrolytic process, also can be with the heat of generation
Solution oil, which reacts, to be generated brominated organic matter and reduces tar quality.
Another technology removes the bromo element in brominated plastics using ammonium hydroxide supercritical fluid method, and technical process includes
Several workshop sections such as pretreatment of raw material, high temperature and pressure debromination, post-processing.1) the shortcomings that technology is primarily present is using super
The brominated plastic wastes of critical fluids method processing, operating condition is high temperature and pressure, and energy consumption is larger, and application in the industry is difficult to
It realizes；2) reaction process generates a large amount of waste water, causes secondary pollution.
Based on this, it is badly in need of the technology of exploitation high-efficiency cleaning processing discarded circuit board at present.
Utility model content
In view of the above-mentioned problems, the utility model provides a kind of system of old circuit board Pyrolyzation and debromination processing.This practicality
It is novel that discarded circuit board is handled using pyrolysismethod, useful metal ingredient in recovery train plate.
In order to achieve the above objectives, the utility model adopts the following technical solution：
According to the utility model, a kind of system of old circuit board Pyrolyzation and debromination processing is provided, including：
Mixer, the mixer include fragment wiring board entrance, solid thermal carriers for handling material stirring mixing
First entrance and mixed material outlet；
Rotary kiln, the rotary kiln are used to material carrying out pyrolysis processing, and include that mixed material entrance and pyrolysis batch mixing go out
Mouthful；Mixed material entrance is connected with the outlet of the mixed material of mixer；
Roto-siofter and gas-solid separator, roto-siofter are arranged in gas-solid separator；Wherein,
Roto-siofter includes solid material inlet, solid thermal load for detaching solid thermal carriers and pyrolysis residue
Body first outlet, pyrolysis residue outlet and gas vent；Solid material inlet is connected with the outlet of the pyrolysis batch mixing of rotary kiln；Heat
Solution solid discharge and gas vent are connected to gas-solid separator；
Gas-solid separator is used to material carrying out gas solid separation, and includes solid matter outlet and gas material outlet；
Knockout tower, the knockout tower for spray into ammonium hydroxide to gas material carry out chilling separation, and include gas material import,
Pyrolysis gas outlet and pyrolysis oil export；Gas material import is connected with the outlet of the gas material of gas-solid separator.Meanwhile spray
Ammonium hydroxide can also absorb the sour gas such as unabsorbed hydrogen bromide in pyrolytic process, prevent from damaging environment.
Further, which also includes：
Centrifuge, which is acted on by centrifugal friction and detaches the attachment on solid thermal carriers, and includes
Solid thermal carriers second entrance, the outlet of the first isolate and the outlet of the second isolate；Solid thermal carriers second entrance and roto-siofter
Solid thermal carriers first outlet be connected, roto-siofter connect with centrifuge can be arranged to opening or closing, such as can make
It is controlled with valve well known to those skilled in the art；When solid thermal carriers and pyrolysis residue are detached in roto-siofter
When, roto-siofter and centrifuge connection closed；When solid thermal carriers and pyrolysis residue detached in roto-siofter completion when, roto-siofter with
Centrifuge connection is opened；Solid thermal carriers in roto-siofter are delivered into centrifuge in a manner of spiral discharging.First separation
Object outlet is for the solid thermal carriers after separation is discharged；Second isolate exports the attachment for being discharged on solid thermal carriers；
Heating furnace, the heating furnace are passed through air and promote heat carrier adherency wherein for being heated to solid thermal carriers
Pyrolysis residue burning removal, and include material inlet and material outlet to be heated；Material inlet and centrifuge to be heated
The first isolate outlet be connected；Material outlet is connected with the solid thermal carriers first entrance of mixer.
Further, system also includes：
Crusher, the crusher are used to old circuit board being cut into fragment, and include useless circuit board entrance and fragment circuit
Plate exports, and fragment circuit board exit is connected with the fragment wiring board entrance of mixer；
Tower is collected, which includes pyrolysis residue entrance, and the solid material of pyrolysis residue entrance and gas-solid separator goes out
Mouth is connected with the outlet of the second isolate of centrifuge.
In addition, the method for carrying out old circuit board Pyrolyzation and debromination using system as described above, includes the following steps：
1) waste printed circuit board passes through crusher in crushing into fragment；Fragment grain size is smaller be pyrolyzed in pyrolytic process it is more abundant.
2) it by solid thermal carriers after preheating device preheats, is mixed into a mixer with waste printed circuit board fragment mixed
Close material；
3) mixed material is sent in rotary kiln, is pyrolyzed；Metal oxide is in pyrolytic process because of and scrap wire
Road plate comes into full contact with the corrosive gas such as the hydrogen bromide generated with pyrolysis and is reacted with solid thermal carriers to generate metal bromide,
The metal bromate salt dissolving that reaction generates is present in pyrolytic carbon or is adhered on metal oxide spheres；
4) material after pyrolysis is sequentially entered into roto-siofter and gas-solid separator detaches, material carries out in roto-siofter
Separation, obtains solid thermal carriers and pyrolysis residue, and pyrolysis residue enters gas-solid separator by the pyrolysis residue outlet of roto-siofter；
The gas material in the material of pyrolysis enters gas-solid separator by the gas vent of roto-siofter simultaneously；Gas material is tar gas
With pyrolysis fixed gas；Pyrolysis residue and gas material are detached in gas-solid separator；
5) enter progress chilling separation in knockout tower by the gas material of gas-solid separator in step 4), obtain pyrolysis gas
And pyrolysis oil；Simultaneously by the pyrolysis residue in gas-solid separator in step 4) enter collect tower recycle, by machinery or
Manual method separation metal layer and glass fibre simultaneously recycle；
6) solid thermal carriers that roto-siofter screens out in step 4) by centrifuge it is mechanically decoupled be adhered on wall be pyrolyzed it is residual
Slag and metal bromate salt dissolving；The pyrolysis residue of separation and metal bromate salt dissolving are sent into pyrolytic carbon treatment process and carry out post-processing；
7) solid thermal carriers that step 6) obtains are heated in heating furnace, air removal solid thermal is passed through in heating furnace
It is sent into mixer after remaining carbon distribution in carrier and is mixed with waste printed circuit board fragment as solid thermal carriers.
Further, solid thermal carriers are metal oxide spheres, and the grain size of solid thermal carriers is 20~40mm, and in order to just
In the screening of later stage heat carrier and pyrolysis material, the grain size of solid thermal carriers is more than the equivalent grain size of fragment.
Further, the equivalent grain size of the fragment in step 1) is 5mm~15mm.
Further, metal oxide include but are not limited to it is following it is several as iron oxide, ferroso-ferric oxide, calcium oxide,
Copper oxide.
Further, the mixing quality ratio of the waste printed circuit board fragment and solid thermal carriers in step 2) be (1: 3)~(1:
10).By the ratio for controlling the charging and metal oxide spheres charging of waste printed circuit board so that the mean temperature of mixture reaches pre-
The pyrolysis temperature first set.
Further, preheating temperature of the solid thermal carriers in preheating device is 700-1200 degrees Celsius in step 2)；Step
It is rapid 7) in heating furnace heat after solid thermal carriers temperature be 700-1200 degrees Celsius.
Further, the temperature of the mixed material in step 2) is 400-800 degrees Celsius.
Further, the pyrolysis temperature in the rotary kiln in step 3) is 400-800 degrees Celsius.
Further, gas material sprays into the separation of ammonium hydroxide chilling in knockout tower, meanwhile, the ammonium hydroxide of spray can also absorb
The sour gas such as unabsorbed hydrogen bromide in pyrolytic process, prevent from damaging environment.
The utility model has the beneficial effects that：
1) the problems such as there are furnace heat transfer efficiency is low, and pyrolysis of waste is incomplete for old circuit board pyrolytic process, this
Utility model is pyrolyzed by using solid thermal carriers and old circuit board, is rotated using rotary kiln and is promoted wiring board and solid
Heat carrier comes into full contact with, and to improve heat transfer efficiency, improves pyrolysis effect.It is handled using rotary kiln solid heat carrier pyrolysis method useless
Wiring board is abandoned, technological process is simple, and solid thermal carriers can be recycled, and reduces offal treatment cost.
2) it is directed to the bromine-containing gas that pyrolysis generates to be easy that equipment is caused to corrode, the tar easily generated with pyrolysis reacts generation
Brominated organic matter reduces tar quality, and the utility model is by using metal oxide as solid thermal carriers and waste and old circuit
Plate is sufficiently mixed, and the Br of pyrolytic reaction generation is absorbed using metal oxide such as iron oxide, copper oxide etc.2, the substances such as HBr,
To effectively remove halides in old circuit board, metal bromate salt dissolving is generated, to prevent it to the corrosion of equipment and the shadow of tar
It rings.
3) traditional old circuit board pyrolysis processing technique is to carry out heating pyrolysis to wiring board using external heating, is generated
The gases such as hydrogen bromide spray ammonium hydroxide etc. in the later stage and carry out vent gas treatment.And the bromine generated, hydrogen bromide are pyrolyzed with deep-etching
Property, the tar reaction for being easy to cause corrosion harmfulness to equipment, and easily generating generates organic bromide reduction tar quality.This reality
The pyrolysis that solid heat carrier method carries out discarded circuit board is done using metal oxide with novel, while improving heat transfer efficiency
Pyrolytic reaction is taken part in, using substances such as metal oxides such as iron oxide, copper oxide, calcium oxide easily with bromine simple substance, hydrogen bromide etc.
Substance reaction, generating metal bromate salt dissolving prevents it to the corrosion of equipment and the influence of tar.
Description of the drawings
Fig. 1 is the schematic diagram of the system handled according to the old circuit board Pyrolyzation and debromination of the utility model；
Fig. 2 is the flow chart of the method handled according to the old circuit board Pyrolyzation and debromination of the utility model.Reference numeral
1 crusher, 2 mixers, 3 rotary kilns, 4 roto-siofters, 5 gas-solid separators, 6 knockout towers, 7 collection towers, 8 centrifuges, 9
Heating furnace.
Specific implementation mode
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with the accompanying drawings and implement
Example, the present invention will be further described in detail.It should be appreciated that specific embodiment described herein is only explaining this
Utility model is not used to limit the utility model.
As shown in Figs. 1-2, show old circuit board Pyrolyzation and debromination processing system, comprising knockout tower 6, crusher 1, mix
Clutch 2, rotary kiln 3, roto-siofter 4, gas-solid separator 5, centrifuge 8, heating furnace 9 and collection tower 7.
Crusher 1 is used to old circuit board being cut into fragment, and includes useless circuit board entrance and fragment circuit board exit, broken
Block circuit board exit is connected with the fragment wiring board entrance of mixer 2；
Mixer 2 includes fragment wiring board entrance, solid thermal carriers first entrance for handling material stirring mixing
And mixed material outlet；
Rotary kiln 3 is used to material carrying out pyrolysis processing, and includes mixed material entrance and the outlet of pyrolysis batch mixing；Mixture
Material entrance is connected with the outlet of the mixed material of mixer 2；
Roto-siofter 4 is arranged in gas-solid separator 5；Wherein,
Roto-siofter 4 includes solid material inlet, solid thermal load for detaching solid thermal carriers and pyrolysis residue
Body first outlet, pyrolysis residue outlet and gas vent；Solid material inlet is connected with the outlet of the pyrolysis batch mixing of rotary kiln 3；
Pyrolysis residue exports and gas vent is connected to gas-solid separator 5；
Gas-solid separator 5 is used to material carrying out gas solid separation, and includes solid matter outlet and gas material outlet；
The knockout tower 6 carries out chilling separation for spraying into ammonium hydroxide to gas material, and includes gas material import, pyrolysis gas
Outlet and pyrolysis oil export；Gas material import is connected with the outlet of the gas material of gas-solid separator 5.
Centrifuge 8 is acted on by centrifugal friction and detaches the attachment on solid thermal carriers, and includes that solid thermal carries
Body second entrance, the outlet of the first isolate and the outlet of the second isolate；The solid thermal of solid thermal carriers second entrance and roto-siofter 4
Carrier first outlet is connected, and roto-siofter is connect with centrifuge can be arranged to open or close, and this field can be used for example
Valve known to technical staff controls；When solid thermal carriers and pyrolysis residue are detached in roto-siofter, roto-siofter
With centrifuge connection closed；When solid thermal carriers and pyrolysis residue detach completion in roto-siofter, roto-siofter connects with centrifuge
It takes out；Solid thermal carriers in roto-siofter are delivered into centrifuge in a manner of spiral discharging.It uses the outlet of first isolate
Solid thermal carriers after discharge detaches；Second isolate exports the attachment for being discharged on solid thermal carriers；
Heating furnace 9 is passed through air and promotes heat carrier adherency pyrolysis therein residual for being heated to solid thermal carriers
Slag burning removal, and include material inlet and material outlet to be heated；First point of material inlet to be heated and centrifuge 8
It is connected from object outlet；Material outlet is connected with the solid thermal carriers first entrance of mixer 2；
The collection tower 7 includes pyrolysis residue entrance, the solid matter outlet of pyrolysis residue entrance and gas-solid separator 5 and from
The second isolate outlet of scheming 8 is connected.
As shown in Figs. 1-2, further it is shown that the method for carrying out old circuit board Pyrolyzation and debromination using system as described above, packet
Include following steps：
1) waste printed circuit board is broken into fragment by crusher 1；Fragment grain size is smaller be pyrolyzed in pyrolytic process it is more abundant.
2) it by solid thermal carriers after preheating device preheats, is mixed into waste printed circuit board fragment in mixer 2
Mixed material；
3) mixed material is sent in rotary kiln 3, is pyrolyzed；Metal oxide is in pyrolytic process because of and scrap wire
Road plate comes into full contact with the corrosive gas such as the hydrogen bromide generated with pyrolysis and is reacted with solid thermal carriers to generate metal bromide,
The metal bromate salt dissolving that reaction generates is present in pyrolytic carbon or is adhered on metal oxide spheres；
4) material after pyrolysis is sequentially entered into roto-siofter 4 and gas-solid separator 5 detaches, material is in roto-siofter 4
It is detached, obtains solid thermal carriers and pyrolysis residue, pyrolysis residue is divided by the pyrolysis residue outlet of roto-siofter 4 into gas-solid
From device 5；The gas material in the material of pyrolysis enters gas-solid separator 5 by the gas vent of roto-siofter 4 simultaneously；Gas material
For tar gas and pyrolysis fixed gas；Pyrolysis residue and gas material are detached in gas-solid separator 5；
5) enter progress chilling separation in knockout tower 6 by the gas material of gas-solid separator 5 in step 4), be pyrolyzed
Gas and pyrolysis oil；The pyrolysis residue in gas-solid separator in step 4) 5 is entered collection tower 7 simultaneously to recycle, by machinery
Or it manual method separation metal layer and glass fibre and recycles；
6) solid thermal carriers that roto-siofter 4 screens out in step 4) are pyrolyzed by mechanically decoupled be adhered on wall of centrifuge 8
Residue and metal bromate salt dissolving；The pyrolysis residue of separation and metal bromate salt dissolving are sent into pyrolytic carbon treatment process and carry out post-processing；
7) solid thermal carriers that step 6) obtains are heated in heating furnace 9, air removal solid is passed through in heating furnace 9
It is sent into mixer 2 after remaining carbon distribution in heat carrier and is mixed with waste printed circuit board fragment as solid thermal carriers.
Preferably, solid thermal carriers are metal oxide spheres, and the grain size of solid thermal carriers is 20~40mm, and for the ease of
The screening of later stage heat carrier and pyrolysis material, the grain size of solid thermal carriers are more than the equivalent grain size of fragment.
Preferably, the equivalent grain size of the fragment in step 1) is 5mm~15mm.
Preferably, metal oxide includes but are not limited to following several such as iron oxide, ferroso-ferric oxide, calcium oxide, oxygen
Change copper.
Preferably, the mixing quality ratio of the waste printed circuit board fragment and solid thermal carriers in step 2) be (1: 3)~(1:
10).By the ratio for controlling the charging and metal oxide spheres charging of waste printed circuit board so that the mean temperature of mixture reaches pre-
The pyrolysis temperature first set.
Preferably, preheating temperature of the solid thermal carriers in preheating device is 700-1200 degrees Celsius in step 2)；Step
7) temperature of the solid thermal carriers after being heated in heating furnace 9 in is 700-1200 degrees Celsius.
Preferably, the temperature of the mixed material in step 2) is 400-800 degrees Celsius.
Preferably, the pyrolysis temperature in step 3) in rotary kiln 3 is 400-800 degrees Celsius.
Preferably, gas material sprays into the separation of ammonium hydroxide chilling in knockout tower 6, meanwhile, the ammonium hydroxide of spray can also absorb
The sour gas such as unabsorbed hydrogen bromide in pyrolytic process, prevent from damaging environment.
Embodiment 1
The present embodiment carries out the pyrolysis of 3 pyrolytic process of rotary kiln using above system using waste and old printed circuit board FR4 plates and takes off
Bromine.
As shown in Figure 1, the waste printed circuit board of collection is crushed by pretreatment into crusher 1, its grain size is made to exist
5mm-10mm, wherein wiring board grain size is smaller, solid thermal carriers mixed with wiring board it is more uniform, pyrolysis efficiency it is higher.
The wiring board being crushed and the solid thermal carriers heated by preheating device (such as heating furnace 9) are fast in ribbon mixer
Speed is uniformly mixed, and solid thermal carriers use iron oxide pellet.The equivalent grain size that the equivalent grain size of iron oxide pellet is more than wiring board is convenient for
The equivalent grain size of the separation in later stage and pyrolysis coke, iron oxide pellet is 20mm.Heating furnace 9 utilizes storage in the way of external heat
Hot type radiant tube burner heats iron oxide pellet, makes its temperature at 1000-1200 DEG C or more.In ribbon mixer 2,
Charge proportion by controlling iron oxide pellet and wiring board is 4: 1 so that the temperature of mixed material is at 600-800 DEG C.
Mixed material, which enters in rotary kiln 3, to be pyrolyzed, and maintains temperature of reaction system between 400~600 DEG C.Mixture
Solid thermal carriers in material, specially iron oxide pellet, iron oxide is in pyrolytic process because being come into full contact with and heat with waste printed circuit board
It solves the corrosive gas hydrogen bromide generated and simple substance bromine reacts to generate ferric bromide and ferrous bromide with iron oxide, reaction generates
Ferric bromide and ferrous bromide be present in pyrolysis residue (such as pyrolytic carbon) or be adhered on iron oxide pellet.
Mixed material enters the roto-siofter 4 in gas-solid separator 5, the gas vent that gas material passes through roto-siofter 4 therewith
Enter in knockout tower 6 into pyrolysis gas in gas-solid separator 5, with the screening of roto-siofter 4, pyrolysis residue passes through roto-siofter 4
Pyrolysis residue outlet enters gas-solid separator 5, and iron oxide pellet stays in roto-siofter 4.Gas material and pyrolysis residue are in gas-solid point
From being detached in device 5, gas material is directly sprayed using ammonium hydroxide in knockout tower 6 and carries out chilling, and reduction pyrolysis gas temperature to 80~
90 DEG C, pyrolytic tar is made to be separated with pyrolysis gas.Pyrolysis residue in gas-solid separator 5 enters to collect to be recycled in tower 7,
The pyrolysis residue of old circuit board includes mainly metallic copper, glass fibre and pyrolytic carbon etc., by machinery or manual method
Separation metal layer and glass fibre simultaneously recycles.
There are fire retardants in wiring board can generate more simple substance bromine and hydrogen bromide in pyrolytic process, most of to turn round
Removal is reacted in kiln 3 with iron oxide pellet, remaining fraction is absorbed in knockout tower 6 by ammonium hydroxide, to effectively remove waste and old circuit
Plate is pyrolyzed bromine product.Experiments verify that the content of organic bromine reduces 57.3% or more in pyrolytic tar.
Iron oxide pellet in roto-siofter 4 enters to the rotation of 8 high speed of centrifuge, passes through the shearing friction between iron oxide pellet
Removal is adhered to the pyrolytic carbon on sphere, and the pyrolytic carbon of separation, which is sent into, to be collected in tower 7, and iron oxide pellet enters in heating furnace 9, profit
Iron oxide pellet is heated with heat accumulating type radiant burner, and is passed through partial air and promotes not removing clean coke in sphere
Charcoal, heated oxide iron ball temperature is to 1000-1200 DEG C or more.Subsequently into mixer 2 again with the discarded circuit board heat of mixing
Solution.
Embodiment 2
The present embodiment carries out the pyrolysis of 3 pyrolytic process of rotary kiln using above system using waste and old printed circuit board FR4 plates and takes off
Bromine.
As shown in Figure 1, the waste printed circuit board of collection is crushed by pretreatment into crusher 1, its grain size is made to exist
10mm-15mm, wherein wiring board grain size is smaller, solid thermal carriers mixed with wiring board it is more uniform, pyrolysis efficiency it is higher.
The wiring board being crushed and the solid thermal carriers heated by preheating device (such as heating furnace 9) are fast in horizontal mixers
Speed is uniformly mixed, and solid thermal carriers are using oxidation calcisphere.The equivalent grain size that the equivalent grain size of oxidation calcisphere is more than wiring board is convenient for
The separation in later stage and pyrolysis coke, the equivalent grain size for aoxidizing calcisphere are 40mm.Heating furnace 9 utilizes storage in the way of external heat
Hot type radiant tube burner heats oxidation calcisphere, makes its temperature at 700-900 DEG C or more.In ribbon mixer 2, lead to
The charge proportion for crossing control oxidation calcisphere and wiring board is 3: 1 so that the temperature of mixed material is at 400-600 DEG C.
Mixed material, which enters in rotary kiln 3, to be pyrolyzed, and maintains temperature of reaction system between 400~600 DEG C.Mixture
Solid thermal carriers in material specially aoxidize calcisphere, and calcium oxide is in pyrolytic process because being come into full contact with and heat with waste printed circuit board
It solves the corrosive gas hydrogen bromide generated and simple substance bromine reacts to generate calcium bromide with calcium oxide, the calcium bromide for reacting generation is deposited
It is in pyrolysis residue (such as pyrolytic carbon) or is adhered on oxidation calcisphere.
Mixed material enters the roto-siofter 4 in gas-solid separator 5, the gas vent that gas material passes through roto-siofter 4 therewith
Enter in knockout tower 6 into pyrolysis gas in gas-solid separator 5, with the screening of roto-siofter 4, pyrolysis residue passes through roto-siofter 4
Pyrolysis residue outlet enters gas-solid separator 5, and oxidation calcisphere stays in roto-siofter 4.Gas material and pyrolysis residue are in gas-solid point
From being detached in device 5, gas material is directly sprayed using ammonium hydroxide in knockout tower 6 and carries out chilling, and reduction pyrolysis gas temperature to 80~
90 DEG C, pyrolytic tar is made to be separated with pyrolysis gas.Pyrolysis residue in gas-solid separator 5 enters to collect to be recycled in tower 7,
The pyrolysis residue of old circuit board includes mainly metallic copper, glass fibre and pyrolytic carbon etc., by machinery or manual method
Separation metal layer and glass fibre simultaneously recycles.
There are fire retardants in wiring board can generate more simple substance bromine and hydrogen bromide in pyrolytic process, most of to turn round
Removal is reacted with oxidation calcisphere in kiln 3, remaining fraction is absorbed in knockout tower 6 by ammonium hydroxide, to effectively remove waste and old circuit
Plate is pyrolyzed bromine product.Experiments verify that the content of organic bromine reduces 52.9% or more in pyrolytic tar.
Oxidation calcisphere in roto-siofter 4 enters to the rotation of 8 high speed of centrifuge, by aoxidizing the shearing friction between calcisphere
Removal is adhered to the pyrolytic carbon on sphere, and the pyrolytic carbon of separation, which is sent into, to be collected in tower 7, and oxidation calcisphere enters in heating furnace 9, profit
Oxidation calcisphere is heated with heat accumulating type radiant burner, and is passed through partial air and promotes not removing clean coke in sphere
Charcoal, heated oxide calcisphere temperature is to 700-900 DEG C or more.Subsequently into mixer 2 again with discarded circuit board mixed pyrolysis.
Embodiment 3
The present embodiment carries out the pyrolysis of 3 pyrolytic process of rotary kiln using above system using waste and old printed circuit board FR4 plates and takes off
Bromine.
As shown in Figure 1, the waste printed circuit board of collection is crushed by pretreatment into crusher 1, make its grain size in 5-
15mm, wherein wiring board grain size is smaller, solid thermal carriers mixed with wiring board it is more uniform, pyrolysis efficiency it is higher.
The wiring board being crushed and the solid thermal carriers heated by preheating device (such as heating furnace 9) are fast in V-type blender
Speed is uniformly mixed, and solid thermal carriers are using oxidation copper ball.The equivalent grain size that the equivalent grain size of oxidation copper ball is more than wiring board is convenient for
The separation in later stage and pyrolysis coke, the equivalent grain size for aoxidizing copper ball are 30mm.Heating furnace 9 utilizes storage in the way of external heat
Hot type radiant tube burner heats oxidation copper ball, makes its temperature at 900-1100 DEG C or more.In ribbon mixer 2,
The charge proportion that copper ball and wiring board are aoxidized by control is 10: 1 so that the temperature of mixed material is at 600-800 DEG C.
Mixed material, which enters in rotary kiln 3, to be pyrolyzed, and maintains temperature of reaction system between 600-800 DEG C.Mixture
Solid thermal carriers in material specially aoxidize copper ball, and copper oxide is in pyrolytic process because being come into full contact with and heat with waste printed circuit board
It solves the corrosive gas hydrogen bromide generated and simple substance bromine reacts to generate copper bromide with copper oxide, the copper bromide for reacting generation is deposited
It is in pyrolysis residue (such as pyrolytic carbon) or is adhered on oxidation copper ball.
Mixed material enters the roto-siofter 4 in gas-solid separator 5, the gas vent that gas material passes through roto-siofter 4 therewith
Enter in knockout tower 6 into pyrolysis gas in gas-solid separator 5, with the screening of roto-siofter 4, pyrolysis residue passes through roto-siofter 4
Pyrolysis residue outlet enters gas-solid separator 5, and oxidation copper ball stays in roto-siofter 4.Gas material and pyrolysis residue are in gas-solid point
From being detached in device 5, gas material is directly sprayed using ammonium hydroxide in knockout tower 6 and carries out chilling, and reduction pyrolysis gas temperature to 80~
90 DEG C, pyrolytic tar is made to be separated with pyrolysis gas.Pyrolysis residue in gas-solid separator 5 enters to collect to be recycled in tower 7,
The pyrolysis residue of old circuit board includes mainly metallic copper, glass fibre and pyrolytic carbon etc., by machinery or manual method
Separation metal layer and glass fibre simultaneously recycles.
There are fire retardants in wiring board can generate more simple substance bromine and hydrogen bromide in pyrolytic process, most of to turn round
Removal is reacted with oxidation copper ball in kiln 3, remaining fraction is absorbed in knockout tower 6 by ammonium hydroxide, to effectively remove waste and old circuit
Plate is pyrolyzed bromine product.Experiments verify that the content of organic bromine reduces 72.1% or more in pyrolytic tar.
Oxidation copper ball in roto-siofter 4 enters to the rotation of 8 high speed of centrifuge, by aoxidizing the shearing friction between copper ball
Removal is adhered to the pyrolytic carbon on sphere, and the pyrolytic carbon of separation, which is sent into, to be collected in tower 7, and oxidation copper ball enters in heating furnace 9, profit
Oxidation copper ball is heated with heat accumulating type radiant burner, and is passed through partial air and promotes not removing clean coke in sphere
Charcoal, heated oxide copper ball temperature is to 900-1100 DEG C or more.Subsequently into mixer 2 again with the discarded circuit board heat of mixing
Solution.
Embodiment 4
The present embodiment carries out the pyrolysis of 3 pyrolytic process of rotary kiln using above system using waste and old printed circuit board FR4 plates and takes off
Bromine.
As shown in Figure 1, the waste printed circuit board of collection is crushed by pretreatment into crusher 1, its grain size is made to exist
6mm-12mm, wherein wiring board grain size is smaller, solid thermal carriers mixed with wiring board it is more uniform, pyrolysis efficiency it is higher.
The wiring board being crushed and the solid thermal carriers heated by preheating device (such as heating furnace 9) are fast in ribbon mixer
Speed is uniformly mixed, and solid thermal carriers use ferroso-ferric oxide ball.The equivalent grain size of ferroso-ferric oxide ball is more than the equivalent of wiring board
Grain size is convenient for the separation in later stage and pyrolysis coke, and the equivalent grain size of ferroso-ferric oxide ball is 25mm.Heating furnace 9 utilizes external heat
Mode heats ferroso-ferric oxide ball using regenerative radiant tube burner, makes its temperature at 800-1000 DEG C or more.
In ribbon mixer 2, the charge proportion by controlling ferroso-ferric oxide ball and wiring board is 7: 1 so that the temperature of mixed material
At 500-700 DEG C.
Mixed material, which enters in rotary kiln 3, to be pyrolyzed, and maintains temperature of reaction system between 500-700 DEG C.Mixture
Solid thermal carriers in material, specially ferroso-ferric oxide ball, ferroso-ferric oxide is in pyrolytic process because abundant with waste printed circuit board
The corrosive gas hydrogen bromide generated with pyrolysis and simple substance bromine is contacted to react to generate ferric bromide and bromination with ferroso-ferric oxide
Ferrous iron, reacts the ferric bromide of generation and ferrous bromide is present in pyrolysis residue (such as pyrolytic carbon) or is adhered to ferroso-ferric oxide ball
On.
Mixed material enters the roto-siofter 4 in gas-solid separator 5, the gas vent that gas material passes through roto-siofter 4 therewith
Enter in knockout tower 6 into pyrolysis gas in gas-solid separator 5, with the screening of roto-siofter 4, pyrolysis residue passes through roto-siofter 4
Pyrolysis residue outlet enters gas-solid separator 5, and ferroso-ferric oxide ball stays in roto-siofter 4.Gas material and pyrolysis residue are in gas
It is detached in solid separator 5, gas material is directly sprayed using ammonium hydroxide in knockout tower 6 and carries out chilling, reduces pyrolysis gas temperature extremely
80~90 DEG C, pyrolytic tar is made to be separated with pyrolysis gas.Pyrolysis residue in gas-solid separator 5 enters to collect to carry out in tower 7
The pyrolysis residue of recycling, old circuit board includes mainly metallic copper, glass fibre and pyrolytic carbon etc., by mechanical or craft
Method detaches metal layer and glass fibre and recycles.
There are fire retardants in wiring board can generate more simple substance bromine and hydrogen bromide in pyrolytic process, most of to turn round
Removal is reacted with ferroso-ferric oxide ball in kiln 3, remaining fraction is absorbed in knockout tower 6 by ammonium hydroxide, waste and old to effectively remove
Wiring board is pyrolyzed bromine product.Experiments verify that the content of organic bromine reduces 69.3% or more in pyrolytic tar.
Ferroso-ferric oxide ball in roto-siofter 4 enters to the rotation of 8 high speed of centrifuge, by between ferroso-ferric oxide ball
Shearing friction removal is adhered to the pyrolytic carbon on sphere, and the pyrolytic carbon of separation, which is sent into, to be collected in tower 7, and ferroso-ferric oxide ball enters to
In heating furnace 9, ferroso-ferric oxide ball is heated using heat accumulating type radiant burner, and is passed through partial air and promotes in sphere
Clean coke is not removed, and heating ferroso-ferric oxide ball temperature is to 800-1000 DEG C or more.Subsequently into mixer 2 again with
Discarded circuit board mixed pyrolysis.
It these are only the preferred embodiment of the utility model, be not used for limiting the scope of the utility model；If
The spirit and scope for not departing from the utility model, are modified or replaced equivalently the utility model, should all cover in this reality
In novel scope of the claims.
Claims (3)
1. a kind of system of old circuit board Pyrolyzation and debromination processing, which is characterized in that include：
Mixer, the mixer include fragment wiring board entrance, solid thermal carriers for handling material stirring mixing
One entrance and mixed material outlet；
Rotary kiln, the rotary kiln are used to material carrying out pyrolysis processing, and include mixed material entrance and the outlet of pyrolysis batch mixing；
The mixed material entrance is connected with the outlet of the mixed material of the mixer；
Roto-siofter and gas-solid separator, the roto-siofter are arranged in the gas-solid separator；Wherein,
The roto-siofter includes solid material inlet, solid thermal load for detaching solid thermal carriers and pyrolysis residue
Body first outlet, pyrolysis residue outlet and gas vent；The solid material inlet and the pyrolysis of the rotary kiln are mixed
Material outlet is connected；The pyrolysis residue outlet and the gas vent are connected to the gas-solid separator；
The gas-solid separator is used to material carrying out gas solid separation, and includes solid matter outlet and gas material outlet；
Knockout tower, the knockout tower carry out chilling separation to gas material for spraying into ammonium hydroxide, and include gas material import, heat
Vent one's spleen outlet and pyrolysis oil export；The gas material import is connected with the outlet of the gas material of the gas-solid separator.
2. the system of old circuit board Pyrolyzation and debromination processing as described in claim 1, which is characterized in that
The system also includes：
Centrifuge, the centrifuge detach the attachment on solid thermal carriers, and include solid thermal carriers second entrance,
First isolate exports and the outlet of the second isolate；The solid thermal of the solid thermal carriers second entrance and the roto-siofter
Carrier first outlet is connected；The first isolate outlet is for the solid thermal carriers after separation is discharged；Second isolate
Export the attachment for being discharged on solid thermal carriers；
Heating furnace, the heating furnace include material inlet and thermal material to be heated for being heated to solid thermal carriers
Outlet；The material inlet to be heated is connected with the outlet of first isolate of the centrifuge；The material outlet with
The solid thermal carriers first entrance of the mixer is connected.
3. the system of old circuit board Pyrolyzation and debromination processing as claimed in claim 2, which is characterized in that the system is also wrapped
Contain：
Crusher, the crusher are used to old circuit board being cut into fragment, and include useless circuit board entrance and fragment circuit board
Outlet, the fragment circuit board exit are connected with the fragment wiring board entrance of the mixer；
Tower is collected, the collection tower includes pyrolysis residue entrance, and the pyrolysis residue entrance is described with the gas-solid separator
Solid matter outlet is connected with the outlet of second isolate of the centrifuge.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201721633804.0U CN207787253U (en) | 2017-11-29 | 2017-11-29 | A kind of system of old circuit board Pyrolyzation and debromination processing |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721633804.0U CN207787253U (en) | 2017-11-29 | 2017-11-29 | A kind of system of old circuit board Pyrolyzation and debromination processing |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20180318842A1 (en) * | 2015-11-09 | 2018-11-08 | Eauterre Consulting, Llc | Method and apparatus for separation and size reduction of noble metal containing sources |
| CN109366796A (en) * | 2018-11-13 | 2019-02-22 | 蒋遂安 | A kind of scrap glass steel processing equipment for recycling |
| JP2020138141A (en) * | 2019-02-28 | 2020-09-03 | 三菱マテリアル株式会社 | Processing method of waste electronic substrate |
| CN112139201A (en) * | 2020-07-30 | 2020-12-29 | 广州维港环保科技有限公司 | Resource recovery processing method for waste circuit board |
| CN112978765A (en) * | 2021-05-20 | 2021-06-18 | 中国恩菲工程技术有限公司 | Waste circuit board pyrolysis debromination purification device and method |
| CN115646999A (en) * | 2022-10-21 | 2023-01-31 | 昆明理工大学 | Method for converting calcium hydroxide pyrolysis waste circuit board into organic bromine |
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2017
- 2017-11-29 CN CN201721633804.0U patent/CN207787253U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20180318842A1 (en) * | 2015-11-09 | 2018-11-08 | Eauterre Consulting, Llc | Method and apparatus for separation and size reduction of noble metal containing sources |
| CN109366796A (en) * | 2018-11-13 | 2019-02-22 | 蒋遂安 | A kind of scrap glass steel processing equipment for recycling |
| JP2020138141A (en) * | 2019-02-28 | 2020-09-03 | 三菱マテリアル株式会社 | Processing method of waste electronic substrate |
| JP7146176B2 (en) | 2019-02-28 | 2022-10-04 | 三菱マテリアル株式会社 | Disposal method for waste electronic substrates |
| CN112139201A (en) * | 2020-07-30 | 2020-12-29 | 广州维港环保科技有限公司 | Resource recovery processing method for waste circuit board |
| CN112978765A (en) * | 2021-05-20 | 2021-06-18 | 中国恩菲工程技术有限公司 | Waste circuit board pyrolysis debromination purification device and method |
| CN115646999A (en) * | 2022-10-21 | 2023-01-31 | 昆明理工大学 | Method for converting calcium hydroxide pyrolysis waste circuit board into organic bromine |
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