CN106906007A - A kind of electron wastes pyrolysis gas cleaning system and its method for processing electron wastes pyrolysis gas - Google Patents
A kind of electron wastes pyrolysis gas cleaning system and its method for processing electron wastes pyrolysis gas Download PDFInfo
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- CN106906007A CN106906007A CN201710144757.1A CN201710144757A CN106906007A CN 106906007 A CN106906007 A CN 106906007A CN 201710144757 A CN201710144757 A CN 201710144757A CN 106906007 A CN106906007 A CN 106906007A
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
- C10K1/00—Purifying combustible gases containing carbon monoxide
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D3/00—Halides of sodium, potassium or alkali metals in general
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D7/00—Carbonates of sodium, potassium or alkali metals in general
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
- C10K1/00—Purifying combustible gases containing carbon monoxide
- C10K1/002—Removal of contaminants
- C10K1/003—Removal of contaminants of acid contaminants, e.g. acid gas removal
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
- C10K1/00—Purifying combustible gases containing carbon monoxide
- C10K1/002—Removal of contaminants
- C10K1/003—Removal of contaminants of acid contaminants, e.g. acid gas removal
- C10K1/005—Carbon dioxide
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
- C10K1/00—Purifying combustible gases containing carbon monoxide
- C10K1/04—Purifying combustible gases containing carbon monoxide by cooling to condense non-gaseous materials
- C10K1/046—Reducing the tar content
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
- C10K1/00—Purifying combustible gases containing carbon monoxide
- C10K1/08—Purifying combustible gases containing carbon monoxide by washing with liquids; Reviving the used wash liquors
- C10K1/10—Purifying combustible gases containing carbon monoxide by washing with liquids; Reviving the used wash liquors with aqueous liquids
- C10K1/12—Purifying combustible gases containing carbon monoxide by washing with liquids; Reviving the used wash liquors with aqueous liquids alkaline-reacting including the revival of the used wash liquors
- C10K1/122—Purifying combustible gases containing carbon monoxide by washing with liquids; Reviving the used wash liquors with aqueous liquids alkaline-reacting including the revival of the used wash liquors containing only carbonates, bicarbonates, hydroxides or oxides of alkali-metals (including Mg)
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Materials Engineering (AREA)
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- Treating Waste Gases (AREA)
- Industrial Gases (AREA)
Abstract
A kind of method the invention discloses electron wastes pyrolysis gas cleaning system and its for processing electron wastes pyrolysis gas, cleaning system includes the air cooler, air heat exchanger, gravity oil-trap, electric oil-trap, caustic wash tower, water scrubber and the booster fan that are sequentially connected in series；The bottom of air cooler, air heat exchanger, gravity oil-trap and electric oil-trap is each provided with being pyrolyzed oil tank；It is that electron wastes pyrolysis gas sequentially pass through air cooler recovery higher boiling pyrolysis oil using the method for the system purification electron wastes pyrolysis gas, low boiling pyrolysis oil in air heat exchanger heat exchange recovery, gravity oil-trap reclaims bulky grain pyrolysis oil, electric oil-trap reclaims remaining pyrolysis oil, and gas phase as combustion gas after alkali cleaning and washing again by returning to combustion system；The system operatio is simple, and the oil gas for being capable of achieving electron wastes pyrolysis gas is kept completely separate, and halogens obtains clean fuel gas in can removing pyrolysis gas, realizes the purifying utilization of resources of pyrolysis gas.
Description
Technical field
The present invention relates to a kind of flue gas purification system, more particularly to a kind of electron wastes pyrolysis gas cleaning system, and its
Method for processing electron wastes pyrolysis gas, belongs to waste electronic and electric equipment resource reclaim and recycling field.
Background technology
With continuing to develop for global economy, resource and Pressure on Energy are increasing, economic transition and industry restructuring
It is more and more urgent.At present on the occasion of the epoch of electronics and information industry fast development, electronics and IT products update and increasingly accelerate, and produce
The substantial amounts of electron wastes of life.Electron wastes receive industry as a kind of regenerated resources, the exploitation of its regenerative use technology
Extensive concern.Pyrolytic technique is the electron wastes treatment technology of current main flow, by pyrolytic technique by electron wastes
The cracking of macromolecule organic component turn into low molecular pyrolysis oil and pyrolysis gas and exclude pyrolysis oven, metal component and glass fibre group
Fractionation is recycled in pyrolysis residue, then respectively.
Pyrolysis oil, the purification process relation of gas mixture to whole electron wastes that electron wastes pyrolytic process is produced
The economy and the feature of environmental protection of processing procedure.Containing a certain amount of in pyrolysis oil, gas mixture that electron wastes pyrolytic process is produced
Halogens and CO2, if not being subject to purified treatment, its combustibility is not only influenceed, and bioxin pollution etc. can be brought tight
Weight environmental issue；Additionally, pyrolysis oil, the Oil-gas Separation of gas mixture are also most important, if oil, qi leel are from incomplete, pyrolysis oil
By corrosion pipeline and valve instrument, pyrolysis gas combustion system is had a strong impact on.
The content of the invention
It is important technological problems urgently to be resolved hurrily, mesh of the invention for existing electron wastes pyrolysis gas purified treatment
Be be to provide a kind of oil gas of achievable electron wastes pyrolysis gas to be kept completely separate recovery, and halogen in pyrolysis gas can be removed
Element pollution, can obtain the electron wastes pyrolysis gas cleaning system of pyrolysis oil and clean fuel gas.
It is to provide a kind of based on electron wastes pyrolysis gas cleaning system realization that another object of the present invention is
Electron wastes pyrolysis gas Oil-gas Separation is reclaimed, and the method for realizing recycling, the method is simple to operate, low cost, is met
Commercial Application requirement.
In order to realize above-mentioned technical purpose, the invention provides a kind of electron wastes pyrolysis gas cleaning system, it includes
Air cooler, air heat exchanger, gravity oil-trap, electric oil-trap, caustic wash tower, water scrubber and the supercharging wind being sequentially connected in series in order
Machine；The bottom of the air cooler, air heat exchanger, gravity oil-trap and electric oil-trap is each provided with being pyrolyzed oil tank.
Preferred scheme, the air cooler has U-shape structure, and its top one end is material inlet, and the other end goes out for material
Mouthful.The internal structure of air cooler is conventional arrangement.
Preferred scheme, the air heat exchanger bottom is provided with air intake, and top is provided with air outlet slit.Air heat exchanger
Inner bag and shell including stainless steel, in heat transfer process, outside cold air is from outside air intake air inlet heat exchanger
Interlayer between shell and inner bag, material passes through from inner bag inside, and both mutually exchange heat, and is heated up after cold air heat exchange, goes out from air
Mouth discharge, feeding combustion system is used as combustion-supporting hot blast.
Preferred scheme, the electric oil-trap includes the electric oil-trap I of series connection and electric oil-trap II.Electric oil-trap is mainly
For removing mink cell focus and light oil.
Preferred scheme, the caustic wash tower top is provided with alkali liquor inlet, and bottom is provided with lye export.Alkali lye is from alkali cleaning tower top
Portion greatly improves alkali cleaning efficiency to spray the gas phase counter current contacting that mode enters into caustic wash tower with bottom, and alkali liquor absorption is acid
After gas, reclaimed from alkali cleaning tower bottom, focused on, NaX (X is halogens) and Na is reclaimed by crystallizing2CO3。
More preferably scheme, the material inlet of the air cooler is connected by pipeline with combustion system, the material of air cooler
Outlet is connected by pipeline with the top of air heat exchanger, and air heat exchanger bottom is connected by pipeline with gravity oil-trap top
Connect, gravity oil-trap top is connected by pipeline with electricity oil-trap I bottoms, electric oil-trap I tops are by pipeline and electric oil-trap
II bottoms are connected, and electric oil-trap II tops are connected by pipeline with caustic wash tower bottom, and caustic wash tower top passes through pipeline and water scrubber
Bottom is connected, and water scrubber top is connected by pipeline with booster fan.
Present invention also offers one kind based on electron wastes pyrolysis gas cleaning system treatment electron wastes pyrolysis
The method of gas, the method be combustion system electron wastes pyrolysis gas out be introduced into air cooler cool to 200 DEG C~
300 DEG C, partial thermal decomposition oil cooling is coagulated into the empty but pyrolysis oil tank of cooler bottom；Empty but cooler gas phase air inlet out
Heat exchanger heat exchange is cooled to 120 DEG C~250 DEG C, in the pyrolysis oil tank of the solidifying air inlet exchanger base of partial thermal decomposition oil cooling；
Air heat exchanger gas phase out enters gravity oil-trap, and the cohesion of bulky grain pyrolysis oil enters the pyrolysis oil of gravity oil-trap bottom
In storage tank；Gravity oil-trap gas phase out enters electric oil-trap, and remaining pyrolysis oil cohesion enters the pyrolysis of electric oil-trap bottom
Oil tank；Electric oil-trap gas phase out enters caustic wash tower, removes sour gas；Caustic wash tower gas phase out is by water scrubber water
Combustion system is returned to by booster fan as combustion gas after washing.
Preferred scheme, cold air enters from the air intake of air heat exchanger, after exchanging heat and heating up, from air outlet slit
Discharge, and combustion system is introduced as combustion-supporting hot blast.
Preferred scheme, the sour gas includes HX and CO2, X is halogen.
Preferred scheme, caustic wash tower gas phase main component out is H2、CO、CH4And other low molecule gaseous state nytrons
Thing, it is free of halogens, can carry out clean combustion as clean fuel gas.
In technical scheme, the pyrolysis oil of collection can be used as fuel or industrial chemicals.
In technical scheme, booster fan is explosion-proof type blower fan, by gas phase (the cleaning combustion in water scrubber out
Gas) 10~15kPa is pressurized to, deliver to combustion system.
Electron wastes pyrolysis gas of the invention come from combustion system, and temperature is 700 DEG C or so, consist predominantly of machine cracking
Gas, and a small amount of sour gas, such as hydrogen chloride, carbon dioxide etc..
Compared with the prior art, the Advantageous Effects that technical scheme is brought：
1) the electron wastes pyrolysis gas cleaning system that the present invention is provided passes through multistage Oil-gas Separation facility so that electronics gives up
Oil, gas being kept completely separate and reclaiming in gurry pyrolysis gas, realizes electron wastes pyrolysis gas recycling.
2) the electron wastes pyrolysis gas cleaning system that the present invention is provided makes full use of high-temperature electronic castoff heat to vent one's spleen latent
Heat, can use air heat exchanger recovery section pyrolysis gas heat energy, substantially reduce the energy consumption in whole technique, and give up using electronics
Gurry pyrolysis gas purified gas are circulated and use, and are conducive to being smoothed out for whole electron wastes pyrolytic process.
3) present invention provide electron wastes pyrolysis gas cleaning system use caustic wash tower absorption pyrolysis gas in HX (X for
Halogens) and CO2Deng sour gas, clean fuel gas are obtained, and alkali wash water can (X be halogen unit by crystallizing recovery product NaX
Element) and Na2CO3。
4) method of the present invention based on electron wastes pyrolysis gas cleaning system treatment electron wastes pyrolysis gas is simple, energy
Low, low cost is consumed, demand of industrial production is met.
Brief description of the drawings
【Fig. 1】It is electron wastes pyrolysis gas cleaning system sketch of the invention；
Wherein, 1 is material inlet, and 2 is air cooler, and 3 is air heat exchanger, and 4 is air intake, and 5 is air outlet slit, and 6 are
Gravity oil-trap, 7 is electric oil-trap I, and 8 is electric oil-trap II, and 9 is alkali liquor inlet, and 10 is caustic wash tower, and 11 is lye export, 12
It is water scrubber, 13 is booster fan, and 14 is supercharging extension set outlet, and 15 is material outlet, and 16 is pyrolysis oil tank.
Specific embodiment
Following examples are intended to further illustrate present invention, rather than the protection model of limitation the claims in the present invention
Enclose.
Electron wastes pyrolysis gas cleaning system of the invention is as shown in Figure 1.It mainly includes air cooler, air heat-exchange
Device, gravity oil-trap, electric oil-trap, caustic wash tower, water scrubber and booster fan.The air cooler is U-shape structure, its top one end
It is material inlet, the other end is material outlet, and its bottom is provided with pyrolysis oil tank.The air heat exchanger is double-decker, bag
Outer and inner courage is included, the space between shell and inner bag is air chamber, air heat exchanger bottom is provided with air intake, and top is provided with sky
Gas is exported.Air outlet slit and air intake are connected with air chamber, and inner bag inside is supplies room, and material flows through inner bag, with air chamber
Air exchanged heat, air heat exchanger bottom is provided with pyrolysis oil tank, and inside connects with inner bag for it, for collecting pyrolysis oil.
Gravity oil-trap bottom is provided with pyrolysis oil tank, and its top is provided with material inlet, and top is provided with material outlet, relies primarily on gravity
Effect sedimentation pyrolysis oil.Caustic wash tower top is provided with alkali liquor inlet, and bottom is provided with lye export, and alkali lye enters from caustic wash tower top alkali lye
Mouth enters, and by spray-absorption sour gas, then includes the electric oil-trap I for connecting from the electric oil-trap of base portion lye export discharge
With electric oil-trap II, electric oil-trap I and electricity oil-trap II bottoms are equipped with pyrolysis oil tank.The water scrubber inside is filled with clear
Water.The material inlet of the air cooler is connected by pipeline with combustion system, and the material outlet of air cooler passes through pipeline and air
The top connection of heat exchanger, air heat exchanger bottom is connected by pipeline with gravity oil-trap top, and gravity oil-trap top is logical
Piping is connected with electricity oil-trap I bottoms, and electric oil-trap I tops are connected by pipeline with electricity oil-trap II bottoms, electric oil-trap
II tops are connected by pipeline with caustic wash tower bottom, and caustic wash tower top is connected by pipeline with water scrubber bottom, water scrubber top
It is connected with booster fan by pipeline, supercharging extension set outlet is connected by pipeline with combustion system.
The method that electron wastes pyrolysis gas are processed by electron wastes pyrolysis gas cleaning system：
With old circuit board pyrolysis gas (mainly comprising phenols, hydrogen halides, carbon dioxide, hydrogen, carbon monoxide and small molecule
Alkanes etc.) as a example by be described as follows：700 DEG C of old circuit board pyrolysis gas are from pyrolysis system out by material inlet into this hair
Bright cleaning system, 200 DEG C -250 DEG C are cooled to by air cooler, and pyrolysis oil ingredient of its mid-boiling point higher than 250 DEG C is in this ring
Section condensation is reclaimed, into the pyrolysis oil tank of the bottom of air cooler 2；Pyrolysis oil, gas mixture continue through air heat exchanger, enter one
Step be cooled to 120 DEG C -200 DEG C, wherein cold wind from cold air inlet air inlet heat exchanger, through the hot blast after heat exchange through hot-blast outlet
Exclude, hot blast enters combustion system as combustion air, the pyrolysis oil tank of pyrolysis oil air inlet exchanger base；Pyrolysis oil,
Gas mixture continues through gravity oil-trap and removes bulky grain pyrolysis oil, and the pyrolysis oil that pyrolysis oil enters gravity oil-trap bottom is stored up
Tank；Pyrolysis oil, gas mixture remove mink cell focus and light oil, pyrolysis oil respectively through one-level electricity oil-trap and two electric oil-traps again
Into the pyrolysis oil tank of electric oil-trap bottom.So far, by multistage Oil-gas Separation facility, being kept completely separate for oil gas is realized, is obtained
To the pyrolysis gas of not oil-containing.Alkali liquor absorption liquid enters caustic wash tower by entrance, and the pyrolysis gas of oil-containing do not remove HX (X through caustic wash tower again
It is halogens) and CO2Deng sour gas, absorbing liquid is discharged through outlet, into later crystallization piece-rate system, obtains product NaX
(X is halogens) and Na2CO3；Pyrolysis gas are washed through water scrubber again, form clean fuel gas；Clean fuel gas are delivered to through booster fan
Combustion system.So far electron wastes pyrolysis oil, gas mixture, realize being kept completely separate for oil gas, and be stripped of dirt therein
Dye component halogen, pyrolysis oil enters storage tank, can be used as fuel or industrial chemicals, and the clean fuel gas for obtaining can be directly used for electronics and give up
Gurry pyrolysis system combustion heat supplying.
Old circuit board pyrolysis gas are produced by the clean fuel gas after this electron wastes pyrolysis gas cleaning system and pyrolysis oil
Rate is as shown in the table：
The clean fuel gas main component for finally giving is as shown in the table：
The pyrolysis oil main component for finally giving is as shown in the table：
Claims (10)
1. a kind of electron wastes pyrolysis gas cleaning system, it is characterised in that：Including the air cooler, the air that are sequentially connected in series in order
Heat exchanger, gravity oil-trap, electric oil-trap, caustic wash tower, water scrubber and booster fan；The air cooler, air heat exchanger, gravity
The bottom of oil-trap and electric oil-trap is each provided with being pyrolyzed oil tank.
2. electron wastes pyrolysis gas cleaning system according to claim 1, it is characterised in that：The air cooler is U-shaped
Structure, its top one end is material inlet, and the other end is material outlet.
3. electron wastes pyrolysis gas cleaning system according to claim 1, it is characterised in that：Under the air heat exchanger
Portion is provided with air intake, and top is provided with air outlet slit.
4. electron wastes pyrolysis gas cleaning system according to claim 1, it is characterised in that：The electric oil-trap includes
The electric oil-trap I of series connection and electric oil-trap II.
5. electron wastes pyrolysis gas cleaning system according to claim 1, it is characterised in that：The caustic wash tower top sets
There is alkali liquor inlet, bottom is provided with lye export.
6. the electron wastes pyrolysis gas cleaning system according to any one of Claims 1 to 4, it is characterised in that：The sky
The material outlet of cooler is connected by pipeline with the top of air heat exchanger, and oil is caught in air heat exchanger bottom by pipeline and gravity
Device top connects, and gravity oil-trap top is connected by pipeline with electricity oil-trap I bottoms, pass through at the top of electric oil-trap I pipeline and
Electric oil-trap II bottoms connection, electric oil-trap II tops are connected by pipeline with caustic wash tower bottom, and caustic wash tower top passes through pipeline
It is connected with water scrubber bottom, water scrubber top is connected by pipeline with booster fan.
7. electron wastes pyrolysis gas cleaning system treatment electron wastes pyrolysis gas described in any one of Claims 1 to 5 are based on
Method, it is characterised in that：Combustion system electron wastes pyrolysis gas out be introduced into air cooler cool to 200 DEG C~
300 DEG C, partial thermal decomposition oil cooling is coagulated into the empty but pyrolysis oil tank of cooler bottom；Empty but cooler gas phase air inlet out
Heat exchanger heat exchange is cooled to 120 DEG C~250 DEG C, in the pyrolysis oil tank of the solidifying air inlet exchanger base of partial thermal decomposition oil cooling；
Air heat exchanger gas phase out enters gravity oil-trap, and the cohesion of bulky grain pyrolysis oil enters the pyrolysis oil of gravity oil-trap bottom
In storage tank；Gravity oil-trap gas phase out enters electric oil-trap, and remaining pyrolysis oil cohesion enters the pyrolysis of electric oil-trap bottom
Oil tank；Electric oil-trap gas phase out enters caustic wash tower, removes sour gas；Caustic wash tower gas phase out is by water scrubber water
Combustion system is returned to by booster fan as combustion gas after washing.
8. it is according to claim 7 based on electron wastes pyrolysis gas cleaning system process electron wastes pyrolysis gas side
Method, it is characterised in that：Cold air enters from the air intake of air heat exchanger, after exchanging heat and heating up, from air outlet slit discharge,
And combustion system is introduced as combustion-supporting hot blast.
9. it is according to claim 7 based on electron wastes pyrolysis gas cleaning system process electron wastes pyrolysis gas side
Method, it is characterised in that：The sour gas includes HX and CO2, X is halogen.
10. electron wastes pyrolysis gas cleaning system according to claim 7, it is characterised in that：Caustic wash tower gas out
Phase main component is H2、CO、CH4And other low molecule hydrocarbon gas.
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Cited By (5)
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|---|---|---|---|---|
| CN108400400A (en) * | 2018-02-07 | 2018-08-14 | 中南大学 | A kind of reuse method of applying waste lithium ionic power battery |
| CN109364720A (en) * | 2018-09-21 | 2019-02-22 | 湖南顶立科技有限公司 | The purification system and its application method of discarded circuit board cracking gas |
| CN110527543A (en) * | 2019-08-05 | 2019-12-03 | 浙江骐骥环境科技有限公司 | A kind of the receipts oil and fixed gas purification system of RDF pyrolysis gas |
| CN114669183A (en) * | 2022-03-21 | 2022-06-28 | 云南磷化集团有限公司 | Phosphorus chemical industry by-product CO2Method for using tail gas for phosphorite flotation |
| WO2023161417A1 (en) | 2022-02-25 | 2023-08-31 | Plastic Energy Limited | A method for the storage or transport of pyrolysis oil |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108400400A (en) * | 2018-02-07 | 2018-08-14 | 中南大学 | A kind of reuse method of applying waste lithium ionic power battery |
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| CN110527543A (en) * | 2019-08-05 | 2019-12-03 | 浙江骐骥环境科技有限公司 | A kind of the receipts oil and fixed gas purification system of RDF pyrolysis gas |
| WO2023161417A1 (en) | 2022-02-25 | 2023-08-31 | Plastic Energy Limited | A method for the storage or transport of pyrolysis oil |
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| CN114669183A (en) * | 2022-03-21 | 2022-06-28 | 云南磷化集团有限公司 | Phosphorus chemical industry by-product CO2Method for using tail gas for phosphorite flotation |
| CN114669183B (en) * | 2022-03-21 | 2024-01-26 | 云南磷化集团有限公司 | Byproduct CO of phosphorus chemical industry 2 Method for using tail gas for phosphorite flotation |
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Application publication date: 20170630 |