Green recycling and harmless treatment method for waste electronic cigarette

Abstract

The invention discloses a green recycling and harmless treatment method for waste electronic cigarettes. The green recycling and harmless treatment method specifically comprises the following steps that S1, the waste electronic cigarettes are subjected to outer package splitting manually, and naked electronic cigarettes are left; s2, the naked waste electronic cigarettes are conveyed to an anaerobic shredding machine under nitrogen protection through a conveying line to be shredded; s3, the shredded materials are conveyed to a high-temperature cracking furnace to be subjected to high-temperature cracking, and cracking flue gas enters a secondary combustion chamber to be subjected to high-temperature harmless treatment; s4, solid substances generated through high-temperature cracking are sequentially conveyed to a magnetic separator and a vortex point flow sorting machine to be subjected to iron material sorting, copper material sorting and aluminum material sorting; and S5, the iron materials, the copper materials and the aluminum materials obtained in the S3 and the S4 are subjected to resource utilization. By adopting the green recycling and harmless treatment method for the waste electronic cigarette, full-resource recycling of the waste electronic cigarette can be realized.

Description

Technical Field

[0001] The present invention belongs to the technical field of waste electronic cigarette treatment, and in particular relates to a method for green resource utilization and harmless disposal of waste electronic cigarettes. Background Art

[0002] With the popularity of e-cigarettes, it is becoming increasingly important to recycle and harmlessly dispose of discarded e-cigarettes and counterfeit and inferior e-cigarettes, especially for the manufacturers who control the production and sale of e-cigarettes.

[0003] E-cigarettes made from materials such as plastics, metals, batteries, and concentrated nicotine solutions have a greater impact on the environment than the entire production process of cigarettes, which are mainly made from plant materials such as tobacco leaves. Most e-cigarette products cannot be reused or recycled, and the nicotine and heavy metals contained in discarded e-cigarette products can be harmful substances that can seep into the soil and water or be ingested by wild animals. Lithium batteries in e-cigarettes can explode and cause fires if damaged or exposed to extreme heat.

[0004] At present, no company at home or abroad can recycle and harmlessly treat waste electronic cigarettes. The recycling and utilization of waste electronic cigarettes is only at the conceptual level, without relevant technical information, and is an undeveloped blank industry with challenges. As for cigarette rods and disposable electronic cigarettes, since they involve complex materials such as circuit boards, lithium batteries, metals, plastics, and e-liquids, they are difficult to dispose of and pose safety and environmental risks. Currently, there is no industrialized disposal information and solutions. Summary of the invention

[0005] In order to solve the above technical problems, the present invention discloses a green resource recovery and harmless disposal method for waste electronic cigarettes.

[0006] To achieve the above objectives, the present invention adopts the following technical solutions: A method for green resource recovery and harmless disposal of waste electronic cigarettes, characterized in that it specifically comprises the following steps: S1. Firstly, the waste electronic cigarettes are manually packaged and separated into the remaining naked electronic cigarettes; S2. The naked waste electronic cigarettes are transported to an oxygen-free shredder under nitrogen protection through a conveyor line for shredding; S3. The shredded material is transported to a high-temperature cracking furnace for high-temperature cracking, and the cracking flue gas enters the secondary combustion chamber for high-temperature harmless treatment; S4. The solid matter produced by high temperature pyrolysis is sequentially transported to a magnetic separator and an eddy current separator for separation of iron, copper and aluminum materials; S5. Recycle the iron, copper and aluminum materials obtained in S3 and S4.

[0007] Furthermore, 50-mesh, 100-mesh and 150-mesh screens are used under the shredder to vibrate and screen the tobacco oil and organic materials, nicotine, propylene glycol or glycerol and blending agents, and perform solid-liquid separation at room temperature.

[0008] Furthermore, the temperature of the high-temperature cracking is 400-700°C, and the cracking is maintained at a slightly negative pressure, and all substances except metals are cracked into gas, and the gas enters the secondary combustion chamber and is harmlessly treated at 700-1000°C.

[0009] Furthermore, the harmless treatment is specifically as follows: first, the pyrolysis waste gas is subjected to high-temperature dust removal, and then the pyrolysis waste gas is transported to a waste heat boiler for waste heat recovery, and finally directly discharged after waste gas absorption and electrostatic dust removal.

[0010] Furthermore, the oxygen-free shredder is a single-shaft shredder.

[0011] Furthermore, the eddy current separator is an eccentric eddy current separator.

[0012] Furthermore, in S4, the pyrolysis waste gas generated by the high-temperature pyrolysis is introduced into a waste gas treatment system for harmless treatment.

[0013] Furthermore, the method also includes sending the remaining slag after separation by the magnetic separator and the eddy current separator to a slag recovery device to recover lithium cobalt oxide.

[0014] The green resource recovery and harmless disposal method of waste electronic cigarettes of the present invention is adopted to perform aerobic high-temperature cracking on the shredded small pieces of waste electronic cigarettes, and the cracking products are gas and solid matter. The gas and dust generated by the decomposition enter the waste gas treatment system for harmless treatment. The solid matter generated by the cracking is mainly metals such as iron, aluminum, copper and carbides after the decomposition of plastics. The solid matter is sorted to sort out materials containing metals such as iron, aluminum, copper and other metals for resource treatment. Finally, the remaining cracking slag is mainly lithium cobalt oxide material, which is utilized as a resource, thereby realizing the full resource recovery and utilization of waste electronics. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a flow chart of the green resource recovery and harmless disposal method of waste electronic cigarettes described in the present invention. DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0017] like Figure 1As shown, a method for green resource recovery and harmless disposal of waste electronic cigarettes is characterized in that it specifically includes the following steps: S1. Firstly, the waste electronic cigarettes are manually packaged and separated into the remaining naked electronic cigarettes; S2. The naked waste electronic cigarettes are transported to an oxygen-free shredder under nitrogen protection through a conveyor line for shredding; S3. The shredded material is transported to a high-temperature cracking furnace for high-temperature cracking. The temperature of the high-temperature cracking is 400-700°C, and the cracking is maintained at a slightly negative pressure. All substances except metals are cracked into gases, and the cracking flue gas enters the secondary combustion chamber for harmless treatment at 700-1000°C; in this embodiment, the high-temperature cracking temperature of the electronic cigarette mixture is 450°C, 550°C, 600°C or 700°C, and the temperature of the harmless treatment of the cracking flue gas is 700°C, 800°C, 900°C or 1000°C; S4. The pyrolysis waste gas generated by high-temperature pyrolysis is introduced into the waste gas treatment system for harmless treatment; the solid matter generated by high-temperature pyrolysis is sequentially transported to the magnetic separator and the vortex point flow separator for separation of iron, copper and aluminum materials; the harmless treatment is specifically as follows: first, the pyrolysis waste gas is subjected to high-temperature dust removal, and then the pyrolysis waste gas is transported to the waste heat boiler for waste heat recovery, and finally directly discharged after waste gas absorption and electrostatic dust removal; S5. Recycling the iron, copper and aluminum materials obtained in S3 and S4; S6. Send the remaining slag after separation by the magnetic separator and eddy current separator to the slag recovery device to recover lithium cobalt oxide.

[0018] In this embodiment, 50-mesh, 100-mesh, and 150-mesh screens are used under the shredder to vibrate and screen the tobacco oil and organic materials, nicotine, propylene glycol or glycerol, and blending agents, and perform solid-liquid separation at room temperature.

[0019] In this embodiment, the oxygen-free shredder is a single-shaft shredder, and the eddy current separator is an eccentric eddy current separator. Of course, in other embodiments, other types of oxygen-free shredders, such as a double-shaft shredder, may also be selected.

[0020] In this embodiment, the composition ratio of the materials after disassembly of a certain commercially available electronic cigarette is shown in Table 1 (Note: data was obtained by physical weighing method).

[0021] Table 1

[0022] The actual material balance of high-temperature pyrolysis of discarded electronic cigarettes is shown in Table 2, where the recovery rate is compared with the proportion of physical splitting.

[0023] Table 2

[0024] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for green resource and harmless disposal of waste electronic cigarettes, characterized in that: The specific steps include: S1. Firstly, the waste electronic cigarettes are manually packaged and separated into the remaining naked electronic cigarettes; S2. The naked waste electronic cigarettes are transported to an oxygen-free shredder under nitrogen protection through a conveyor line for shredding; S3. The shredded material is transported to a high-temperature cracking furnace for high-temperature cracking, and the cracking flue gas enters the secondary combustion chamber for high-temperature harmless treatment; S4. The solid matter produced by high temperature pyrolysis is sequentially transported to a magnetic separator and an eddy current separator for separation of iron, copper and aluminum materials; S5. Recycle the iron, copper and aluminum materials obtained in S3 and S4.

2. A method for green resource recovery and harmless disposal of waste electronic cigarettes according to claim 1, characterized in that: Under the shredder, 50-mesh, 100-mesh and 150-mesh screens are used to vibrate and screen the tobacco oil and organic materials - nicotine, propylene glycol or propylene glycol and blending agents, and perform solid-liquid separation at room temperature.

3. A method for green resource recovery and harmless disposal of waste electronic cigarettes according to claim 1, characterized in that: The temperature of the high-temperature cracking is 400-700°C, and the cracking is maintained at a slightly negative pressure. All substances except metals are cracked into gases, and the gases enter the secondary combustion chamber and are harmlessly treated at 700-1000°C.

4. A method for green resource recovery and harmless disposal of waste electronic cigarettes according to claim 1, characterized in that: The harmless treatment is specifically as follows: first, the pyrolysis waste gas is subjected to high-temperature dust removal, and then the pyrolysis waste gas is transported to a waste heat boiler for waste heat recovery, and finally directly discharged after waste gas absorption and electrostatic dust removal.

5. A method for green resource recovery and harmless disposal of waste electronic cigarettes according to claim 1, characterized in that: The oxygen-free shredder is a single-shaft shredder.

6. A method for green resource recovery and harmless disposal of waste electronic cigarettes according to claim 1, characterized in that: The eddy current separator is an eccentric eddy current separator.

7. A method for green resource recovery and harmless disposal of waste electronic cigarettes according to claim 1, characterized in that: In S4, the pyrolysis waste gas generated by the high temperature pyrolysis is introduced into the waste gas treatment system for harmless treatment.

8. A method for green resource recovery and harmless disposal of waste electronic cigarettes according to claim 1, characterized in that: The method further comprises sending the remaining slag after separation by the magnetic separator and the eddy current separator to a slag recovery device to recover the lithium cobalt oxide.

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