CN206051568U - A kind of system for processing waste and old electronic product - Google Patents
A kind of system for processing waste and old electronic product Download PDFInfo
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- CN206051568U CN206051568U CN201620977790.3U CN201620977790U CN206051568U CN 206051568 U CN206051568 U CN 206051568U CN 201620977790 U CN201620977790 U CN 201620977790U CN 206051568 U CN206051568 U CN 206051568U
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- 239000002699 waste material Substances 0.000 title claims abstract description 39
- 238000012545 processing Methods 0.000 title abstract description 7
- 238000000197 pyrolysis Methods 0.000 claims abstract description 70
- 238000004519 manufacturing process Methods 0.000 claims abstract description 31
- 239000005997 Calcium carbide Substances 0.000 claims description 79
- CLZWAWBPWVRRGI-UHFFFAOYSA-N tert-butyl 2-[2-[2-[2-[bis[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]amino]-5-bromophenoxy]ethoxy]-4-methyl-n-[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]anilino]acetate Chemical compound CC1=CC=C(N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)C(OCCOC=2C(=CC=C(Br)C=2)N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)=C1 CLZWAWBPWVRRGI-UHFFFAOYSA-N 0.000 claims description 79
- 238000000926 separation method Methods 0.000 claims description 31
- 239000007787 solid Substances 0.000 claims description 27
- 239000002296 pyrolytic carbon Substances 0.000 claims description 26
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 20
- 229910052799 carbon Inorganic materials 0.000 claims description 20
- 239000002994 raw material Substances 0.000 claims description 17
- 238000002156 mixing Methods 0.000 claims description 15
- 239000000126 substance Substances 0.000 claims description 14
- 239000003575 carbonaceous material Substances 0.000 claims description 11
- 239000000428 dust Substances 0.000 claims description 8
- 238000000746 purification Methods 0.000 claims description 8
- 238000007885 magnetic separation Methods 0.000 claims description 7
- 238000002485 combustion reaction Methods 0.000 claims description 5
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 4
- 229910052791 calcium Inorganic materials 0.000 claims description 4
- 239000011575 calcium Substances 0.000 claims description 4
- 239000007800 oxidant agent Substances 0.000 claims 2
- 230000001590 oxidative effect Effects 0.000 claims 2
- 238000011084 recovery Methods 0.000 abstract description 6
- 230000008878 coupling Effects 0.000 abstract description 3
- 238000010168 coupling process Methods 0.000 abstract description 3
- 238000005859 coupling reaction Methods 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 52
- 239000003921 oil Substances 0.000 description 28
- 238000000034 method Methods 0.000 description 17
- 229910052751 metal Inorganic materials 0.000 description 14
- 239000002184 metal Substances 0.000 description 14
- 238000006243 chemical reaction Methods 0.000 description 11
- 238000005516 engineering process Methods 0.000 description 11
- 239000000446 fuel Substances 0.000 description 8
- 239000003365 glass fiber Substances 0.000 description 8
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 7
- 239000000292 calcium oxide Substances 0.000 description 7
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 7
- 238000007599 discharging Methods 0.000 description 7
- 150000002739 metals Chemical class 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 229910052755 nonmetal Inorganic materials 0.000 description 4
- 230000035484 reaction time Effects 0.000 description 4
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 239000010813 municipal solid waste Substances 0.000 description 3
- 238000004064 recycling Methods 0.000 description 3
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 2
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- 235000011941 Tilia x europaea Nutrition 0.000 description 2
- 230000004075 alteration Effects 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 2
- 239000000920 calcium hydroxide Substances 0.000 description 2
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 2
- 235000011116 calcium hydroxide Nutrition 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
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- 238000009854 hydrometallurgy Methods 0.000 description 2
- 239000004571 lime Substances 0.000 description 2
- 239000006028 limestone Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005272 metallurgy Methods 0.000 description 2
- 239000011368 organic material Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229920000915 polyvinyl chloride Polymers 0.000 description 2
- 239000004800 polyvinyl chloride Substances 0.000 description 2
- 238000007781 pre-processing Methods 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 1
- 239000013064 chemical raw material Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 239000010793 electronic waste Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
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- 239000002245 particle Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
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- 238000006467 substitution reaction Methods 0.000 description 1
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- 238000007158 vacuum pyrolysis Methods 0.000 description 1
Classifications
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/141—Feedstock
- Y02P20/143—Feedstock the feedstock being recycled material, e.g. plastics
Landscapes
- Processing Of Solid Wastes (AREA)
Abstract
This utility model discloses a kind of system for processing waste and old electronic product.The system includes：Pretreatment unit, mixed cell, pyrolysis unit, separative element and carbide production unit.Pretreatment unit, mixed cell, pyrolysis unit, separative element are connected with carbide production unit order.Pyrolysis unit is connected with carbide production unit.The recovery of Waste ammunition and carbide production coupling are realized that the resource of Waste ammunition is recycled and reduces carbide production cost by this utility model.
Description
Technical Field
The utility model belongs to solid waste resourceful treatment field especially relates to a system for handle old and useless electronic product.
Background
With the rapid development of science and technology, waste electronic products and leftover materials formed in the processing process of the electronic products are increasing day by day. Annual yields of electronic waste in developed countries such as japan, the usa and the european union account for 1%, 2-5% and 4% of municipal waste, respectively, and increase at a rate of 16% -28% per 5 years, which is 3-5 times the rate of municipal waste growth. The situation is particularly serious in China, the population of China is large, and the China is also a main place for dumping electronic garbage in developed countries, data shows that 80% of electronic garbage in the United states is exported to Asia, and 90% of the electronic garbage enters China.
The technology for recycling and treating the waste circuit boards at home and abroad mainly comprises a mechanical physical separation method, a hydrometallurgy technology, a biological metallurgy technology and a pyrolysis technology, and most of the technologies pay attention to recycling metal in the waste printed circuit boards except for pyrolysis. The mechanical physical separation method is easy to scale, relatively causes little pollution to the environment, but various metals cannot be thoroughly separated, and the residual organic matters are buried or burned, so that resources are wasted and the environmental pollution is serious; the metal recovery rate of hydrometallurgy is high, but the consumption of chemical reagents is large, the process is complex, and the high molecular organic compounds in the circuit board are not recycled; the biological metallurgy technology is still in the research stage at present, and suitable bacteria are few and are difficult to culture; in comparison, through the combination of pyrolysis technology pyrolysis and physical separation methods, the metal in the waste electronic products can be effectively recovered, and the high molecular organic materials in the waste electronic products can be utilized to decompose the metal into fuel oil, fuel gas and carbide.
The chemical name of calcium carbide, colorless crystal, is mainly used for producing acetylene gas, and has been called as the mother material of organic synthesis industry. Acetylene is an important chemical raw material and is mainly used for producing polyvinyl chloride and vinyl acetate products, 70 percent of the raw material acetylene for producing PVC products in China is from calcium carbide, the calcium carbide has very important effect on the economic development of China, the yield is continuously increased in more than ten years, and the yield reaches over 2200 million tons in 2013.
The production process of calcium carbide mainly comprises an electric heating method and an oxygen heating method.
In addition, because the heat release amount of the unit carbon-containing fuel in incomplete combustion is small, a large amount of carbon-containing fuel needs to be combusted to supply heat, more ash is generated and is enriched into a calcium carbide product, and the quality of the calcium carbide product is greatly influenced. How to reduce the production cost of calcium carbide and increase the income of calcium carbide enterprises becomes one of the development problems of the calcium carbide industry in China.
At present, a simple pyrolysis method is generally adopted for treating waste electronic products, a method for recovering metals after pyrolysis is provided, but the method neglects the utilization of fuel generated in the pyrolysis process, the maximization of resource utilization is not achieved, and meanwhile, the vacuum pyrolysis has high requirements on equipment and is difficult to realize industrialization.
As can be seen from the above, the following problems exist in the prior art: the recycling level of the non-metallic substances is not enough in the waste electronic product treatment; pyrolysis treatment of waste electronic products is mostly used as a pretreatment means, and subsequent utilization technology of pyrolysis products is lacked; the production of calcium carbide needs a large amount of coke and heat energy/electric energy, and has high raw material cost and high energy consumption; the ash after the combustion by the oxygen thermal method is enriched in the calcium carbide product, and the quality of the calcium carbide product is influenced.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem, the utility model discloses aim at being in the same place the resourceful recovery processing and the carbide production technology coupling of old and useless electronic product to utilize the high temperature oil gas that the old and useless electronic product of pyrolysis produced to provide the heat for carbide production, realize the resourceful recycle to old and useless electronic product simultaneously and reduce carbide manufacturing cost and reduce the purpose of carbide ash content.
In order to achieve the above object, the utility model provides a system for handle old and useless electronic product, this system includes: a pretreatment unit, a mixing unit, a pyrolysis unit, a separation unit and a calcium carbide production unit, wherein,
the pretreatment unit comprises a disassembly unit and a crushing unit, the disassembly unit comprises a waste electronic product inlet and a disassembly product outlet, the crushing unit comprises a disassembly product inlet and a pretreatment product outlet, and the disassembly product inlet is connected with the disassembly product outlet;
the mixing unit comprises a pretreatment product inlet, a calcium-based raw material inlet and a mixed product outlet, and the pretreatment product inlet is connected with the pretreatment product outlet;
the pyrolysis unit comprises a mixed product inlet, a solid carbon-containing substance outlet and a high-temperature oil gas outlet, and the mixed product inlet is connected with the mixed product outlet;
the separation unit comprises a solid carbonaceous material inlet and a pyrolytic carbon outlet, and the solid carbonaceous material inlet is connected with the solid carbonaceous material outlet;
the calcium carbide production unit comprises a high-temperature oil gas inlet, a pyrolytic carbon inlet and a calcium carbide product outlet, wherein the high-temperature oil gas inlet is connected with the high-temperature oil gas outlet, and the pyrolytic carbon inlet is connected with the pyrolytic carbon outlet.
Specifically, the separation unit is one or a combination of an air separation unit, a magnetic separation unit or an electrostatic separation unit; and a sealed discharging device is arranged at the solid carbon-containing substance outlet.
Further, the calcium carbide production unit comprises a calcium carbide tail gas outlet; the system further comprises a gas purification and dust removal unit, wherein the gas purification and dust removal unit comprises a calcium carbide tail gas inlet, and the calcium carbide tail gas inlet is connected with the calcium carbide tail gas outlet.
Furthermore, the calcium carbide production unit also comprises a combustion-supporting gas inlet, and combustion-supporting gas is introduced into the combustion-supporting gas inlet for auxiliary combustion.
Utilize the above-mentioned system and method of the utility model, through the resourceful recovery processing and the carbide production technology coupling with old and useless electronic product to utilize old and useless electronic product pyrolysis gas high temperature oil gas to provide the heat for carbide production, the utility model discloses following effect has been obtained:
(1) the clean and efficient resource treatment of waste electronic products is realized;
(2) the method is beneficial to the separation and recovery of metal, nonmetal and glass fiber in the waste electronic products;
(3) the high-value utilization of the pyrolysis products of the waste electronic products is realized;
(4) the raw materials with low price can be used, so that the cost of the raw materials for calcium carbide production is reduced;
(5) pyrolysis high-temperature oil gas is combusted to be used as a calcium carbide generation supplementary heat source, so that the power consumption is reduced;
additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
Fig. 1 is a schematic structural diagram of a system for processing waste electronic products according to the present invention.
Fig. 2 is a process flow diagram of the present invention for processing waste electronic products.
Detailed Description
The invention will be described in more detail with reference to the following figures and examples, so that the aspects and advantages of the invention can be better understood. However, the specific embodiments and examples described below are for illustrative purposes only and are not intended to limit the present invention.
In an aspect of the utility model, the utility model provides a system for handle old and useless electronic product, this system includes preprocessing unit, mixing unit, pyrolysis unit, separation unit and carbide production unit:
a pretreatment unit: the method comprises the steps of disassembling and crushing, according to different raw materials of the waste electronic products, the waste electronic products can be recycled, and the waste electronic products are roughly crushed, wherein the crushing granularity is 20-100 mm.
B, mixing unit: the crushed product is mixed with a calcium-based raw material (one or a mixture of lime, limestone, hydrated lime or carbide slag).
C, pyrolysis unit: and uniformly feeding the mixed product into a pyrolysis furnace for pyrolysis reaction at the pyrolysis temperature of 450-850 ℃ for 0.5-3h, generating high-temperature oil gas and solid carbon-containing substances after the pyrolysis reaction is completed, collecting the high-temperature oil gas through an oil gas pipeline arranged in the pyrolysis furnace, and discharging the solid carbon-containing substances through a sealed discharging device.
D, a separation unit: comprises one or more of fine crushing, air separation, magnetic separation and electrostatic separation. Because the waste electronic products are subjected to pyrolysis reaction, wherein the non-metal organic matters are pyrolyzed into pyrolytic carbon, the metal and the glass fibers do not react, the calcium-based raw materials are changed into calcium oxide, the pyrolyzed solid carbonaceous products are easier to separate than the original electronic products, and the yield of the solid carbonaceous products is 5-20%. The solid carbonaceous material from the pyrolysis unit is separated into metals, glass fibers and residues (pyrolytic carbon and calcium oxide) by a separation unit.
E, calcium carbide production unit: because the nonmetal in the waste electronic product is mostly high molecular organic materials such as epoxy resin, the remainder ash content that the pyrolysis is left out is low, and fixed carbon content is high, contains calcium oxide, is suitable for the raw materials as the carbide production. And (3) conveying the residues from the pyrolysis unit into a calcium carbide furnace, wherein the calcium carbide furnace adopts a combination of a plurality of electrodes and a plurality of burners to provide a heat source for the calcium carbide raw material. The combustor is used as a supplementary heat source of the electrode, the fuel is high-temperature oil gas from the pyrolysis unit, and supplementary combustion-supporting gas is used for combustion. The temperature of the calcium carbide furnace is 1700-.
The invention will now be described with reference to specific examples, which are intended to be illustrative only and not to be limiting in any way.
Example 1
This embodiment provides a system for handle old and useless electronic product, and this system includes preprocessing unit, mixing unit, pyrolysis unit, separation unit and carbide production unit:
a, pretreatment: and disassembling and recovering recyclable elements of waste electronic products, and coarsely crushing the recyclable elements with the crushing granularity of 20 mm.
B, mixing: and mixing the pre-treated product with the carbide slag to obtain a mixed product.
C, pyrolysis: and uniformly feeding the mixed product into a pyrolysis furnace for pyrolysis reaction, wherein the pyrolysis temperature is 450 ℃, the pyrolysis time is 3h, high-temperature oil gas and solid carbon-containing substances are generated after the pyrolysis reaction is completed, the high-temperature oil gas is collected through an oil gas pipeline arranged in the pyrolysis furnace, and the solid carbon-containing substances are discharged through a sealed discharging device.
D, separation: the solid carbonaceous material from the pyrolysis unit is subjected to fine crushing, air separation, magnetic separation into metals, glass fibers and residues (pyrolytic carbon and calcium oxide). Wherein the content of the pyrolytic carbon is 10 percent of the original waste electronic product. The pyrolytic carbon properties are as follows:
TABLE 1 pyrolytic carbon Main Properties
| Item | Unit of | Numerical value | Remarks for note |
| Moisture content | wt％ | 1.12 | Received base |
| Fixed carbon | wt％ | 83.58 | Received base |
| Volatile component | wt％ | 9.76 | Received base |
| Ash content | wt％ | 5.54 | Received base |
E, calcium carbide production: and (3) conveying the residues from the separation unit into a calcium carbide furnace, wherein the temperature of heat conveyed into the calcium carbide furnace is 400 ℃. The calcium carbide furnace adopts a combination of a plurality of electrodes and a plurality of burners to provide a heat source for calcium carbide raw materials. The burner is used as a supplementary heat source of the electrode, and the fuel is high-temperature oil gas from the pyrolysis unit. The temperature of the calcium carbide furnace is 1900 ℃, the reaction time is 30min, the calcium carbide tail gas enters the gas purification and dust removal unit, and the calcium carbide product is discharged from the discharge hole. The calcium carbide content in the calcium carbide product is 79.41 percent, and the gas forming amount is 289L/kg.
Example 2
This example is the same as the system used in example 1 above, but with different process conditions, as follows:
a, pretreatment: and disassembling and recovering recyclable elements of waste electronic products, and coarsely crushing the recyclable elements with the crushing granularity of 40 mm.
B, mixing: and mixing the pretreated product with hydrated lime to obtain a mixed product.
C, pyrolysis: and uniformly feeding the mixed product into a pyrolysis furnace for pyrolysis reaction, wherein the pyrolysis temperature is 450 ℃, the pyrolysis time is 1h, high-temperature oil gas and solid carbon-containing substances are generated after the pyrolysis reaction is completed, the high-temperature oil gas is collected through an oil gas pipeline arranged in the pyrolysis furnace, and the solid carbon-containing substances are discharged through a sealed discharging device.
D, separation: the solid carbonaceous material from the pyrolysis unit is subjected to fine crushing, air separation, magnetic separation into metals, glass fibers and residues (pyrolytic carbon and calcium oxide). Wherein the content of the pyrolytic carbon is 8 percent of the original waste electronic product. The pyrolytic carbon properties are as follows:
TABLE 2 pyrolytic carbon Main Properties
| Item | Unit of | Numerical value | Remarks for note |
| Moisture content | wt％ | 1.13 | Received base |
| Fixed carbon | wt％ | 83.77 | Received base |
| Volatile component | wt％ | 9.5 | Received base |
| Ash content | wt％ | 5.6 | Received base |
E, calcium carbide production: and (3) conveying the residues from the separation unit into a calcium carbide furnace, wherein the temperature of heat conveyed into the calcium carbide furnace is 500 ℃. The calcium carbide furnace adopts a combination of a plurality of electrodes and a plurality of burners to provide a heat source for calcium carbide raw materials. The burner is used as a supplementary heat source of the electrode, and the fuel is high-temperature oil gas from the pyrolysis unit. The temperature of the calcium carbide furnace is 1700 ℃, the reaction time is 50min, the calcium carbide tail gas enters the gas purification and dust removal unit, and the calcium carbide product is discharged from the discharge hole. The calcium carbide content in the product calcium carbide is 77.17%, and the gas evolution is 290L/kg.
Example 3
This example is the same as the system used in example 1 above, but with different process conditions, as follows:
a, pretreatment: and disassembling and recovering recyclable elements of waste electronic products, and coarsely crushing the recyclable elements to obtain the crushed particle size of 60 mm.
B, mixing: and mixing the pre-treated product with limestone to obtain a mixed product.
C, pyrolysis: and uniformly feeding the mixed product into a pyrolysis furnace for pyrolysis reaction, wherein the pyrolysis temperature is 850 ℃, the pyrolysis time is 1h, high-temperature oil gas and solid carbon-containing substances are generated after the pyrolysis reaction is completed, the high-temperature oil gas is collected through an oil gas pipeline arranged in the pyrolysis furnace, and the solid carbon-containing substances are discharged through a sealed discharging device.
D, separation: the solid carbonaceous material from the pyrolysis unit is subjected to fine crushing, air separation, magnetic separation into metals, glass fibers and residues (pyrolytic carbon and calcium oxide). Wherein the content of the pyrolytic carbon is 12 percent of the original waste electronic product. The pyrolytic carbon properties are as follows:
TABLE 3 pyrolytic carbon Main Properties
| Item | Unit of | Numerical value | Remarks for note |
| Moisture content | wt％ | 1.21 | Received base |
| Fixed carbon | wt％ | 83.02 | Received base |
| Volatile component | wt％ | 10.11 | Received base |
| Ash content | wt％ | 5.66 | Received base |
E, calcium carbide production: and (3) conveying the residues from the separation unit into a calcium carbide furnace, wherein the temperature of heat conveyed into the calcium carbide furnace is 700 ℃. The calcium carbide furnace adopts a combination of a plurality of electrodes and a plurality of burners to provide a heat source for calcium carbide raw materials. The burner is used as a supplementary heat source of the electrode, and the fuel is high-temperature oil gas from the pyrolysis unit. The temperature of the calcium carbide furnace is 1800 ℃, the reaction time is 5min, the calcium carbide tail gas enters the gas purification and dust removal unit, and the calcium carbide product is discharged from the discharge hole. The calcium carbide content in the product calcium carbide is 76.55 percent, and the gas evolution is 292L/kg.
Example 4
This example is the same as the system used in example 1 above, but with different process conditions, as follows:
a, pretreatment: and disassembling and recovering recyclable elements of waste electronic products, and coarsely crushing the recyclable elements with the crushing granularity of 100 mm.
B, mixing: and mixing the pretreated product with lime to obtain a mixed product.
C, pyrolysis: and uniformly feeding the mixed product into a pyrolysis furnace for pyrolysis reaction, wherein the pyrolysis temperature is 850 ℃, the pyrolysis time is 0.5h, high-temperature oil gas and solid carbon-containing substances are generated after the pyrolysis reaction is completed, the high-temperature oil gas is collected through an oil gas pipeline arranged in the pyrolysis furnace, and the solid carbon-containing substances are discharged through a sealed discharging device.
D, separation: the solid carbonaceous material from the pyrolysis unit is subjected to fine crushing, air separation, magnetic separation into metals, glass fibers and residues (pyrolytic carbon and calcium oxide). Wherein the content of the pyrolytic carbon is 10 percent of the original waste electronic product. The pyrolytic carbon properties are as follows:
TABLE 4 pyrolytic carbon Main Properties
| Item | Unit of | Numerical value | Remarks for note |
| Moisture content | wt％ | 1.27 | Received base |
| Fixed carbon | wt％ | 84.15 | Received base |
| Volatile component | wt％ | 9.11 | Received base |
| Ash content | wt％ | 5.47 | Received base |
E, calcium carbide production: and (3) conveying the residues from the separation unit into a calcium carbide furnace, wherein the temperature of the heat conveyed into the calcium carbide furnace is 800 ℃. The calcium carbide furnace adopts a combination of a plurality of electrodes and a plurality of burners to provide a heat source for calcium carbide raw materials. The burner is used as a supplementary heat source of the electrode, and the fuel is high-temperature oil gas from the pyrolysis unit. The temperature of the calcium carbide furnace is 2200 ℃, the reaction time is 10min, the calcium carbide tail gas enters the gas purification and dust removal unit, and the calcium carbide product is discharged from the discharge hole. The calcium carbide content in the calcium carbide product is 77.66 percent, and the gas forming amount is 284L/kg.
As can be seen from the above embodiment, the utility model realizes the clean and high-efficiency resource treatment of the waste electronic products; the method is beneficial to the separation and recovery of metal, nonmetal and glass fiber in the waste electronic products; the high-value utilization of the pyrolysis products of the waste electronic products is realized; the raw materials with low price can be used, so that the cost of the raw materials for calcium carbide production is reduced; high-temperature oil gas is combusted to be used as a supplementary heat source for calcium carbide generation, so that the power consumption is reduced.
Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.
The disclosure of the present application is directed to exemplary embodiments, and various changes and modifications may be made in the various embodiments of the present application without departing from the scope of the invention as defined in the appended claims. Accordingly, the described embodiments are intended to embrace all such alterations, modifications and variations that fall within the scope of the appended claims. Furthermore, unless the context indicates otherwise, words that appear in the singular include the plural and vice versa. Additionally, all or a portion of any embodiment may be utilized with all or a portion of any other embodiment, unless stated otherwise.
Claims (5)
1. A system for treating waste electronic products comprises a pretreatment unit, a mixing unit, a pyrolysis unit, a separation unit and a calcium carbide production unit; wherein,
the pretreatment unit comprises a disassembly unit and a crushing unit, the disassembly unit comprises a waste electronic product inlet and a disassembly product outlet, the crushing unit comprises a disassembly product inlet and a pretreatment product outlet, and the disassembly product inlet is connected with the disassembly product outlet;
the mixing unit comprises a pretreatment product inlet, a calcium-based raw material inlet and a mixed product outlet, and the pretreatment product inlet is connected with the pretreatment product outlet;
the pyrolysis unit comprises a mixed product inlet, a solid carbon-containing substance outlet and a high-temperature oil gas outlet, and the mixed product inlet is connected with the mixed product outlet;
the separation unit comprises a solid carbonaceous material inlet and a pyrolytic carbon outlet, and the solid carbonaceous material inlet is connected with the solid carbonaceous material outlet;
the calcium carbide production unit comprises a high-temperature oil gas inlet, a pyrolytic carbon inlet and a calcium carbide product outlet, wherein the high-temperature oil gas inlet is connected with the high-temperature oil gas outlet, and the pyrolytic carbon inlet is connected with the pyrolytic carbon outlet.
2. The system of claim 1, wherein the separation unit is one of an air classification unit, a magnetic separation unit, or an electrostatic classification unit, or a combination thereof.
3. The system of claim 1, wherein the solid carbonaceous outlet is provided with a sealed discharge.
4. The system of claim 1, wherein the calcium carbide production unit comprises a calcium carbide tail gas outlet; the system further comprises a gas purification and dust removal unit, wherein the gas purification and dust removal unit comprises a calcium carbide tail gas inlet, and the calcium carbide tail gas inlet is connected with the calcium carbide tail gas outlet.
5. The system of claim 1, wherein the calcium carbide production unit further comprises an oxidant gas inlet through which oxidant gas is introduced to assist combustion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620977790.3U CN206051568U (en) | 2016-08-29 | 2016-08-29 | A kind of system for processing waste and old electronic product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620977790.3U CN206051568U (en) | 2016-08-29 | 2016-08-29 | A kind of system for processing waste and old electronic product |
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| CN106185940A (en) * | 2016-08-29 | 2016-12-07 | 北京神雾环境能源科技集团股份有限公司 | A kind of system and method processing waste and old electronic product |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106185940A (en) * | 2016-08-29 | 2016-12-07 | 北京神雾环境能源科技集团股份有限公司 | A kind of system and method processing waste and old electronic product |
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