System and method for treating waste electronic products

An electronic product and waste technology, applied in the field of solid waste recycling, can solve the problems of high equipment requirements, insufficient recycling of non-metallic materials, and neglect of utilization, etc., to achieve clean and efficient recycling of resources and achieve high value The effect of chemical utilization and reduction of raw material cost

Inactive Publication Date: 2016-12-07
SHENWU TECH GRP CO LTD
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Problems solved by technology

[0007] At present, a simple pyrolysis method is usually used to treat waste electronic products, and a method for recovering metals after pyrolysis is given, but this method ignores the utilization of pyrolysis gas, pyrolysis carbon and other products in the pyrolysis process, and has not reached the goal of resource utilization. At the same time, vacuum pyrolysis has high requirements on equipment, and it is difficult to realize industrialization
[0008] As can be seen from the above, there are the following problems in the prior art: the recycling level of non-metallic substances in the treatment of waste electronic products is not enough; the pyrolysis treatment of waste electronic products is mostly used as a pretreatment method, and the subsequent utilization technology of pyrolysis products is lacking; Coke and heat / electricity, high cost of raw materials and high energy consumption; the ash content after combustion by oxythermal method is enriched in calcium carbide products, affecting the quality of calcium carbide products

Method used

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  • System and method for treating waste electronic products

Examples

Experimental program
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Effect test

Embodiment 1

[0047] This embodiment proposes a system for processing waste and old electronic products, the system includes a pretreatment unit, a separation unit, a pyrolysis unit, a mixing unit and a calcium carbide production unit:

[0048] A Pretreatment: In the pretreatment unit, the waste electronic products are dismantled and broken to obtain pretreated products.

[0049] B Separation: The pretreated product is finely crushed, ferromagnetic metals are selected by magnetic separation, wind separation and electrostatic separation are separated to obtain other metals, glass fibers and non-metallic organic matter, the content of non-metallic organic matter is 37%, and the content of non-metallic organic matter is Particle size control is 100mm.

[0050] C pyrolysis: feed the non-metallic product into the pyrolysis furnace evenly for pyrolysis reaction, the pyrolysis temperature is 550°C, and the pyrolysis time is 3h. After the pyrolysis reaction is complete, high-temperature oil gas and...

Embodiment 2

[0056] The present embodiment is the same as the system used in the above-mentioned embodiment 1, but the process conditions are different, as follows:

[0057] A Pretreatment: In the pretreatment unit, the waste electronic products are dismantled and broken to obtain pretreated products.

[0058] B Separation: The pretreated product is finely crushed, ferromagnetic metals are selected by magnetic separation, and other metals, glass fibers and non-metallic organic matter are obtained by winnowing and electrostatic separation. The content of non-metallic organic matter is 35%, and the content of non-metallic organic matter is Particle size control is 60mm.

[0059] C pyrolysis: feed the non-metallic product into the pyrolysis furnace evenly for pyrolysis reaction, the pyrolysis temperature is 450°C, and the pyrolysis time is 2h. After the pyrolysis reaction is complete, high-temperature oil gas and solid carbonaceous matter are generated. , high-temperature oil and gas are col...

Embodiment 3

[0065] The present embodiment is the same as the system used in the above-mentioned embodiment 1, but the process conditions are different, as follows:

[0066] A Pretreatment: In the pretreatment unit, the waste electronic products are dismantled and broken to obtain pretreated products.

[0067] B Separation: The pretreated product is finely crushed, ferromagnetic metals are selected by magnetic separation, wind separation and electrostatic separation are separated to obtain other metals, glass fibers and non-metallic organic matter, the content of non-metallic organic matter is 40%, and the content of non-metallic organic matter is Particle size control is 20mm.

[0068] C pyrolysis: feed the non-metallic product into the pyrolysis furnace evenly for pyrolysis reaction, the pyrolysis temperature is 850°C, and the pyrolysis time is 0.5h. After the pyrolysis reaction is complete, high-temperature oil gas and solid carbon are generated The high-temperature oil and gas are col...

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Abstract

The invention discloses a system and method for treating waste electronic products. The system comprises a pretreatment unit, a separating unit, a pyrolysis unit, a mixing unit, a gas-oil separation purification unit and a calcium carbide production unit. The method comprises the following steps: (1) pretreatment: disassembling and crushing the waste electronic products; (2) separation: carrying out fine crushing and separation on the pretreated product to obtain a non-metal product; (3) pyrolysis: pyrolyzing the non-metal product to generate high-temperature oil gas and a solid carbonous substance, collecting the high-temperature oil gas, and discharging the solid carbonous substance; (4) mixing: mixing the solid carbonous substance and a calcium-base raw material; and (5) calcium carbide production: carrying out reaction on the mixing product in a calcium carbide furnace to obtain calcium carbide. The method integrates recovery of the waste electronic products with the production of calcium carbide, thereby recycling the waste electronic products and lowering the calcium carbide production cost.

Description

technical field [0001] The invention belongs to the field of solid waste resource treatment, in particular to a system and method for waste electronic product treatment. Background technique [0002] With the rapid development of science and technology, waste electronic products and scraps formed during the processing of electronic products are also increasing day by day. In developed countries such as Japan, the United States, and the European Union, the annual output of electronic waste accounts for 1%, 2-5% and 4% of urban waste respectively, and grows at a rate of 16%-28% every 5 years, which is 3 times the growth rate of urban waste. -5 times. This situation is particularly serious in my country, which not only has a large population, but also is the main place for dumping e-waste in developed countries. Statistics show that 80% of e-waste in the United States is exported to Asia, and 90% of it enters my country. [0003] Domestic and foreign technologies for recyclin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/32C10B53/00C10B57/00
CPCC10B53/00C01P2006/80C10B57/00
Inventor 贾懿曼陶进峰王江华包欣欣王鹏飞吴道洪
Owner SHENWU TECH GRP CO LTD
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