CN206051567U - The system that a kind of waste and old electronic product is processed - Google Patents
The system that a kind of waste and old electronic product is processed Download PDFInfo
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- CN206051567U CN206051567U CN201620976555.4U CN201620976555U CN206051567U CN 206051567 U CN206051567 U CN 206051567U CN 201620976555 U CN201620976555 U CN 201620976555U CN 206051567 U CN206051567 U CN 206051567U
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- 239000002699 waste material Substances 0.000 title claims abstract description 30
- 238000000197 pyrolysis Methods 0.000 claims abstract description 81
- 238000004519 manufacturing process Methods 0.000 claims abstract description 32
- 239000005997 Calcium carbide Substances 0.000 claims description 81
- 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 81
- 239000007787 solid Substances 0.000 claims description 38
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 37
- 229910052799 carbon Inorganic materials 0.000 claims description 37
- 229910052755 nonmetal Inorganic materials 0.000 claims description 33
- 239000000126 substance Substances 0.000 claims description 32
- 238000000926 separation method Methods 0.000 claims description 29
- 239000002994 raw material Substances 0.000 claims description 17
- 238000002156 mixing Methods 0.000 claims description 16
- 238000002485 combustion reaction Methods 0.000 claims description 13
- 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
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 6
- 229910052791 calcium Inorganic materials 0.000 claims description 6
- 239000011575 calcium Substances 0.000 claims description 6
- 238000012545 processing Methods 0.000 claims description 6
- 239000007800 oxidant agent Substances 0.000 claims 2
- 230000001590 oxidative effect Effects 0.000 claims 2
- 238000011084 recovery Methods 0.000 abstract description 5
- 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 69
- 239000003921 oil Substances 0.000 description 36
- 238000000034 method Methods 0.000 description 14
- 238000005516 engineering process Methods 0.000 description 11
- 238000006243 chemical reaction Methods 0.000 description 10
- 238000004458 analytical method Methods 0.000 description 8
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 8
- 238000007599 discharging Methods 0.000 description 7
- 239000000446 fuel Substances 0.000 description 7
- 229910052751 metal Inorganic materials 0.000 description 7
- 239000002184 metal Substances 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 239000003575 carbonaceous material Substances 0.000 description 5
- 229910052739 hydrogen Inorganic materials 0.000 description 5
- 239000001257 hydrogen Substances 0.000 description 5
- 239000002245 particle Substances 0.000 description 5
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 4
- 229910002091 carbon monoxide Inorganic materials 0.000 description 4
- 125000004435 hydrogen atom Chemical class [H]* 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
- 235000019738 Limestone Nutrition 0.000 description 2
- 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
- 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
- 230000000694 effects Effects 0.000 description 2
- 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
- 150000002739 metals Chemical class 0.000 description 2
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- 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
- 239000004593 Epoxy Substances 0.000 description 1
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-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
- 239000002737 fuel gas Substances 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- -1 hydrogen methane carbon monoxide Chemical class 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 238000007158 vacuum pyrolysis Methods 0.000 description 1
Landscapes
- Processing Of Solid Wastes (AREA)
Abstract
This utility model discloses the system that a kind of waste and old electronic product is processed.The system includes：Pretreatment unit, separative element, mixed cell, pyrolysis unit and carbide production unit.Pretreatment unit, separative element, mixed cell, pyrolysis unit are connected with carbide production unit order.Pyrolysis unit high temperature pyrolysis oil gas vent is connected with carbide production unit with high temperature pyrolysis oil gas entrance.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 that old and useless electronic product handled.
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 pyrolysis gas, pyrolysis carbon and other products in the pyrolysis process, does not achieve the maximization of resource utilization, and simultaneously, the vacuum pyrolysis has high requirements on equipment, so that the industrialization is difficult to realize.
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 that old and useless electronic product handled, this system includes: a pretreatment unit, a separation unit, a mixing unit, a pyrolysis 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 separation unit comprises a pretreatment product inlet and a nonmetal product outlet, and the pretreatment product inlet is connected with the pretreatment product outlet;
the mixing unit comprises a non-metal product inlet, a calcium-based raw material inlet and a mixed product outlet, and the non-metal product inlet is connected with the non-metal 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 calcium carbide production unit comprises a high-temperature oil gas inlet, a solid carbon-containing substance 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 solid carbon-containing substance inlet is connected with the solid carbon-containing substance 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 combusted in an auxiliary mode through the combustion-supporting gas inlet.
Utilize the above-mentioned system of the utility model, through the resourceful recovery processing and the carbide production technology coupling with old and useless electronic product together 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 high-value utilization of the pyrolysis products of the waste electronic products is realized;
(3) the raw materials with low price can be used, so that the cost of the raw materials for calcium carbide production is reduced;
(4) 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;
(5) the combustion pyrolysis oil gas has no ash content, and has no influence on the quality of the calcium carbide product.
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 waste electronic product treatment of the present invention.
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 that old and useless electronic product handled, this system include preprocessing unit, separation unit, mixing unit, pyrolysis unit and carbide production unit:
a, pretreatment: and in the pretreatment unit, the waste electronic products are disassembled and crushed to obtain a pretreatment product.
B, separation: and (3) subjecting the pretreated product to one or more of fine crushing, air separation, magnetic separation and electrostatic separation to obtain a non-metal product, wherein the particle size of the non-metal product is controlled to be 0.5-100 mm.
C, mixing: mixing the non-metal product with calcium-based raw material (one or more of lime, limestone, hydrated lime or carbide slag) to obtain mixed product.
D, pyrolysis: and uniformly feeding the mixed product into a pyrolysis furnace for pyrolysis reaction, wherein the pyrolysis temperature is 450-850 ℃, the pyrolysis time is 0.5-3h, and the yield of pyrolysis oil gas can be improved due to the fact that the raw material contains calcium-based substances. High-temperature oil gas and solid carbonaceous matter 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 oil gas yield is 20-45%. And discharging the solid carbonaceous material through a sealed discharging device.
E, calcium carbide production: because the nonmetal among the old and useless electronic product is mostly high molecular organic material such as epoxy, the solid carbonaceous ash content after the pyrolysis is low, and fixed carbon content is high, is suitable for the carbon base raw materials as carbide production, and the pyrolysis of calcium base raw materials is calcium oxide simultaneously, can regard as the calcium source of carbide production just. And (3) feeding the solid carbon-containing substances from the pyrolysis unit into a calcium carbide furnace, wherein the heat feeding temperature is 350-750 ℃. 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. Wherein the combustor is as the supplementary heat source of electrode, and the fuel is the high temperature oil gas of collecting at the pyrolysis unit, and supplementary combustion-supporting gas burns, and this pyrolysis oil gas is rich in hydrogen methane carbon monoxide, and the combustion product ash-free can not reduce carbide product quality. 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 that old and useless electronic product handled, this system includes preprocessing unit, separation unit, mixing unit, pyrolysis unit and carbide production unit:
a, pretreatment: and in the pretreatment unit, the waste electronic products are disassembled and crushed to obtain a pretreatment product.
B, separation: and (3) subjecting the pretreated product to one or more of fine crushing, air separation, magnetic separation and electrostatic separation to obtain a nonmetal product, wherein the particle size of the nonmetal product is controlled to be 0.5mm, and the content of nonmetal organic matters is 39%. The industrial analysis of non-metal organics is as follows:
TABLE 1 Industrial analysis of non-metallic organic substances sorted
| Item | Unit of | Numerical value | Remarks for note |
| Moisture content | wt％ | 0.6 | Received base |
| Fixed carbon | wt％ | 20.4 | Received base |
| Volatile component | wt％ | 75.1 | Received base |
| Ash content | wt％ | 3.9 | Received base |
C, mixing: and mixing the nonmetal product with lime to obtain a mixed product.
D, pyrolysis: and uniformly feeding the mixed product into a pyrolysis furnace for pyrolysis reaction, wherein the pyrolysis temperature is 450 ℃, the pyrolysis time is 2 hours, 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, the oil gas yield is 30%, and the solid carbon-containing substances are discharged through a sealed discharging device. The main properties of the solid carbonaceous material are as follows:
TABLE 2 solid carbonaceous essential Properties
E, calcium carbide production: and feeding solid carbon-containing substances from the pyrolysis unit into a calcium carbide furnace, wherein the hot feeding temperature of the solid carbon-containing substances is 350 ℃. 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 pyrolysis oil gas from the pyrolysis unit, supplementary combustion-supporting gas is used for combustion, the combustible gas is rich in hydrogen, methane and carbon monoxide, combustion products are ash-free, and the quality of calcium carbide products cannot be reduced. The temperature of the calcium carbide furnace is 2200 ℃, 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 a discharge hole, wherein the content of calcium carbide in the calcium carbide product is 79.11 percent, and the gas evolution quantity is 288L/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 in the pretreatment unit, the waste electronic products are disassembled and crushed to obtain a pretreatment product.
B, separation: and (3) subjecting the pretreated product to one or more of fine crushing, air separation, magnetic separation and electrostatic separation to obtain a nonmetal product, wherein the particle size of the nonmetal product is controlled to be 60mm, and the content of nonmetal organic matters is 41%. The industrial analysis of non-metal organics is as follows:
TABLE 3 Industrial analysis of non-metallic organic substances sorted
| Item | Unit of | Numerical value | Remarks for note |
| Moisture content | wt％ | 0.61 | Received base |
| Fixed carbon | wt％ | 20.49 | Received base |
| Volatile component | wt％ | 74.8 | Received base |
| Ash content | wt％ | 4.1 | Received base |
C, mixing: and mixing the nonmetal product with limestone to obtain a mixed product.
D, 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, the oil gas yield is 40%, and the solid carbon-containing substances are discharged through a sealed discharging device. The main properties of the solid carbonaceous material are as follows:
TABLE 4 solid carbonaceous essential Properties
| Item | Unit of | Numerical value | Remarks for note |
| Moisture content | wt％ | 1.24 | Received base |
| Fixed carbon | wt％ | 83.58 | Received base |
| Volatile component | wt％ | 9.57 | Received base |
| Ash content | wt％ | 5.61 | Received base |
E, calcium carbide production: and feeding solid carbon-containing substances from the pyrolysis unit into a calcium carbide furnace, wherein the hot feeding temperature of the solid carbon-containing substances is 750 ℃. 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 pyrolysis oil gas from the pyrolysis unit, supplementary combustion-supporting gas is used for combustion, the combustible gas is rich in hydrogen, methane and carbon monoxide, combustion products are ash-free, and the quality of calcium carbide products cannot be reduced. The temperature of the calcium carbide furnace is 2000 ℃, the reaction time is 20min, the calcium carbide tail gas enters the gas purification and dust removal unit, and the calcium carbide product is discharged from a discharge hole, wherein the calcium carbide content in the calcium carbide product is 78.88%, and the gas evolution is 289L/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 in the pretreatment unit, the waste electronic products are disassembled and crushed to obtain a pretreatment product.
B, separation: and (3) subjecting the pretreated product to one or more of fine crushing, air separation, magnetic separation and electrostatic separation to obtain a nonmetal product, wherein the particle size of the nonmetal product is controlled to be 50mm, and the content of nonmetal organic matters is 37%. The industrial analysis of non-metal organics is as follows:
TABLE 5 Industrial analysis of non-metallic organic substances sorted
| Item | Unit of | Numerical value | Remarks for note |
| Moisture content | wt％ | 0.51 | Received base |
| Fixed carbon | wt％ | 20.21 | Received base |
| Volatile component | wt％ | 75.4 | Received base |
| Ash content | wt％ | 3.88 | Received base |
C, mixing: and mixing the nonmetal product with hydrated lime to obtain a mixed product.
D, pyrolysis: and uniformly feeding the mixed product into a pyrolysis furnace for pyrolysis reaction, wherein the pyrolysis temperature is 650 ℃, 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, the oil gas yield is 35%, and the solid carbon-containing substances are discharged through a sealed discharging device. The main properties of the solid carbonaceous material are as follows:
TABLE 6 solid carbonaceous essential Properties
| Item | Unit of | Numerical value | Remarks for note |
| Moisture content | wt％ | 1.11 | Received base |
| Fixed carbon | wt％ | 84.09 | Received base |
| Volatile component | wt％ | 9.44 | Received base |
| Ash content | wt％ | 5.36 | Received base |
E, calcium carbide production: and feeding solid carbon-containing substances from the pyrolysis unit into a calcium carbide furnace, wherein the hot feeding temperature of the solid carbon-containing substances is 450 ℃. 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 pyrolysis oil gas from the pyrolysis unit, supplementary combustion-supporting gas is used for combustion, the combustible gas is rich in hydrogen, methane and carbon monoxide, combustion products are ash-free, and the quality of calcium carbide products cannot be reduced. 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, the calcium carbide product is discharged from the discharge hole, the calcium carbide content in the calcium carbide product is 80.25%, and the gas evolution quantity is 290L/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 in the pretreatment unit, the waste electronic products are disassembled and crushed to obtain a pretreatment product.
B, separation: and (3) subjecting the pretreated product to one or more of fine crushing, air separation, magnetic separation and electrostatic separation to obtain a nonmetal product, wherein the particle size of the nonmetal product is controlled to be 100mm, and the content of nonmetal organic matters is 37%. The industrial analysis of non-metal organics is as follows:
TABLE 7 Industrial analysis of non-metallic organic substances sorted
C, mixing: and mixing the non-metal product with the carbide slag to obtain a mixed product.
D, pyrolysis: and uniformly feeding the mixed product into a pyrolysis furnace for pyrolysis reaction, wherein the pyrolysis temperature is 550 ℃, the pyrolysis time is 3 hours, 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, the oil gas yield is 25%, and the solid carbon-containing substances are discharged through a sealed discharging device. The main properties of the solid carbonaceous material are as follows:
TABLE 8 solid carbonaceous essential Properties
| Item | Unit of | Numerical value | Remarks for note |
| Moisture content | wt％ | 1.15 | Received base |
| Fixed carbon | wt％ | 83.79 | Received base |
| Volatile component | wt％ | 9.45 | Received base |
| Ash content | wt％ | 5.61 | Received base |
E, calcium carbide production: and feeding solid carbon-containing substances from the pyrolysis unit into a calcium carbide furnace, wherein the hot feeding temperature of the solid carbon-containing substances is 550 ℃. 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 pyrolysis oil gas from the pyrolysis unit, supplementary combustion-supporting gas is used for combustion, the combustible gas is rich in hydrogen, methane and carbon monoxide, combustion products are ash-free, and the quality of calcium carbide products cannot be reduced. The temperature of the calcium carbide furnace is 1800 ℃, the reaction time is 10min, the calcium carbide tail gas enters the gas purification and dust removal unit, the calcium carbide product is discharged from the calcium carbide product discharge port, the calcium carbide content in the calcium carbide product is 78.43%, and the gas evolution quantity is 287L/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 processing waste electronic products comprises a pretreatment unit, a separation unit, a mixing unit, a pyrolysis 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 separation unit comprises a pretreatment product inlet and a nonmetal product outlet, and the pretreatment product inlet is connected with the pretreatment product outlet;
the mixing unit comprises a non-metal product inlet, a calcium-based raw material inlet and a mixed product outlet, and the non-metal product inlet is connected with the non-metal 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 calcium carbide production unit comprises a high-temperature oil gas inlet, a solid carbon-containing substance 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 solid carbon-containing substance inlet is connected with the solid carbon-containing substance 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.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106185939A (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 | The system and method that a kind of waste and old electronic product processes |
| CN106185941A (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 | The system and method that a kind of waste and old electronic product processes |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106185939A (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 | The system and method that a kind of waste and old electronic product processes |
| CN106185941A (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 | The system and method that a kind of waste and old electronic product processes |
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