CN111112301A

CN111112301A - System and method for treating waste photovoltaic cell panel by using plasma technology

Info

Publication number: CN111112301A
Application number: CN202010021109.9A
Authority: CN
Inventors: 张孝勇; 朱宪然; 王路路
Original assignee: Thermal Power Generation Technology Research Institute of China Datang Corporation Science and Technology Research Institute Co Ltd
Current assignee: Thermal Power Generation Technology Research Institute of China Datang Corporation Science and Technology Research Institute Co Ltd
Priority date: 2020-01-09
Filing date: 2020-01-09
Publication date: 2020-05-08

Abstract

The invention discloses in the field of waste treatment: a system for treating waste and used photovoltaic panels using plasma technology, comprising a pretreatment system, a crushing and conveying system, a plasma treatment system, an exhaust gas treatment system, a cooling system and a preheating recovery system. The photovoltaic solar panels are disassembled and sorted, and the sorted plastic products are transported to the crushing and conveying system, and then crushed, preheated, and plasma treated. The plasma-treated slag is cooled and recovered, and the cooled The molten slag is passed into the recovery area, and also includes a steam boiler and a recovery area. The steam boiler is connected with the crushing conveying system, the plasma treatment system and the cooling system respectively. It produces secondary pollution, makes full use of the waste heat generated in the treatment process, and further reduces energy consumption.

Description

System and method for treating waste photovoltaic cell panel by using plasma technology

Technical Field

The invention relates to the technical field of waste treatment, in particular to a system and a method for treating waste photovoltaic cell panels by using a plasma technology.

Background

The service life of the solar panel is 20 years to 30 years. With the mass production of global solar energy manufacturing industry in the last few years, several years later, the world will raise the "end of life" tide of a wave photovoltaic panel, reaching even thousands of tons!by 2050!

Previously, aged or damaged solar panels were typically sent to a glass recycling facility where only the glass and aluminum frames were recycled. And the remaining material is sent to a cement kiln for incineration. In addition, the glass recycling plant can only recycle the special glass of the solar cell panel and mix the special glass with other common glass, which causes waste. There are existing recycling plants that can recycle 95% of the material in crystalline silicon photovoltaic panels. A "crystalline silicon" photovoltaic panel. A typical crystalline silicon solar panel is made of 65-75% glass, 10-15% aluminum frame, 10% plastic and 3-5% silicon. While a recycling plant can disassemble, sort, process and recycle 95% of its material. The sorted materials are processed and packaged and then sent to different industries for reuse. Wherein, two thirds of the glass becomes cullet after being recycled and is sent to the glass manufacturing industry; the aluminum frame is sent to an aluminum refinery; the waste plastics can be used as fuel in cement factories; the recovered silicon can be reused in precious metal industry; finally, the remaining cables and splices are crushed and sold in the form of copper beads.

When the plastic waste is incinerated, if a conventional low-temperature incineration method is adopted, harmful substances such as dioxin and the like are generated due to the excessively low incineration temperature (about 1000 ℃), and typical persistent secondary pollutants have potential hazards to human beings and ecological environment. If the incineration is carried out by adopting modes such as electric arc and the like, the incineration temperature is too high (9000-.

Based on the above, the invention designs a system and a method for treating waste photovoltaic cell panels by using a plasma technology, so as to solve the above-mentioned problems.

Disclosure of Invention

The invention aims to provide a system and a method for treating waste photovoltaic cell panels by using a plasma technology, so as to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: a system for treating waste photovoltaic cell panels by utilizing a plasma technology comprises a pretreatment system, a crushing and conveying system, a plasma treatment system, a waste gas treatment system, a cooling system and a preheating and recycling system,

the pretreatment system is used for disassembling and sorting the recovered photovoltaic solar panel and conveying the sorted plastic products to the crushing conveying system;

the crushing conveying system is used for conveying, crushing and preheating the sorted plastic products;

the plasma processing system is used for carrying out plasma processing on the sorted plastic products;

the waste gas treatment system is used for treating the waste gas after plasma treatment;

the cooling system is used for cooling and recovering the slag after plasma treatment and introducing the cooled slag into a recovery area;

the preheating recovery system is used for recovering heat generated in the plasma treatment process;

the plasma treatment system also comprises a steam boiler and a recovery area, wherein the steam boiler is respectively connected with the crushing conveying system, the plasma treatment system and the cooling system.

Preferably, the pretreatment system adopts an automatic robot to complete the disassembly and sorting work of the recovered solar panel.

Preferably, the crushing conveying system comprises a first conveying belt, a crusher, a screw elevator and a preheating device, the first conveying belt conveys the sorted plastics to the upper part of the crusher, the discharge end at the bottom end of the crusher is connected to the feed end of the screw elevator, and the discharge end at the top end of the screw elevator is connected to the preheating device.

Preferably, the preheating device comprises a preheating box, a first feeding port and a second discharging port which are located below the discharging end of the top end of the spiral elevator are respectively formed in the top of the preheating box and the bottom of the outer wall of the preheating box, a plurality of second conveying belts are horizontally and alternately arranged in the preheating box, the discharging ends of the second conveying belts are located on one sides of the discharging ports, and steam inlets are uniformly formed in the bottom of an inner cavity of the preheating box.

Preferably, plasma processing system includes plasma reation kettle, plasma reation kettle's inner chamber from the top down is vaporizer, melting chamber and drip chamber in proper order, install plasma generator on the inner wall of melting chamber, plasma reation kettle's inner wall is equipped with the intermediate layer, interbedded inside spiral is around being connected with condenser tube, plasma reation kettle's top and bottom are opened gas vent and bin outlet respectively, plasma reation kettle's outer wall is opened there is the feed inlet two that is connected with the discharge gate, feed inlet two is located plasma generator's top.

Preferably, the exhaust gas treatment system includes the gas pipeline, the one end of gas pipeline is connected with steam boiler's exhaust outlet, the other end of gas pipeline connects gradually secondary combustion room waste heat recovery device two, deacidification quench tower, filter equipment, dust collector one, dust collector two, denitrification facility, chimney and draught fan.

Preferably, preheat recovery system and include exhaust pipe, recovery pipeline one, recovery pipeline two and recovery pipeline three, the one end of exhaust pipe is connected with steam boiler, the other end of exhaust pipe is connected with steam inlet through the exhaust fan, recovery pipeline one is connected respectively between steam boiler and gas vent, recovery pipeline two is connected respectively between steam boiler and condenser tube's delivery port.

Preferably, the cooling system adopts a heat exchanger, the third recovery pipeline is connected between the heat exchanger and a steam boiler, the discharge port penetrates through the heat exchanger through a pipeline and is connected with the recovery area, and a slag discharge valve is arranged on the pipeline connected with the discharge port and positioned in front of the heat exchanger.

Preferably, the inside of the filter device is provided with activated carbon and slaked lime, the first dust removal device is a baffle plate gravity dust removal device, the second dust removal device is a cloth bag dust removal device, the first dust removal device comprises baffle plates which are arranged on the inner wall of the first dust removal device in a staggered mode, and the bottom of the first dust removal device is provided with an ash outlet.

A method for treating waste photovoltaic cell panels by using a plasma technology specifically comprises the following steps:

s1: the automatic robot is adopted to complete the disassembly and sorting work of the recovered solar panel, and two thirds of glass becomes cullet after being recovered and is sent to the glass manufacturing industry; the aluminum frame is sent to an aluminum refinery; the recovered silicon can be reused in precious metal industry; the remaining cables and splices are crushed and sold in the form of copper beads; the waste plastics are conveyed to a crusher through a first conveying belt to be crushed;

s2: conveying the plastic crushed by the crusher to a preheating device through a screw elevator, supplying preheating energy of the preheating device through an exhaust pipeline and an exhaust fan connected with a steam boiler, and introducing the plastic preheated by the preheating device into a plasma reaction kettle for treatment;

s3: the plastic enters the plasma reaction kettle through the second feeding hole, the melted organic matters of the plastic are discharged through the discharge hole at the bottom of the interlayer under the action of the plasma generator and then are treated, the melted synthetic gas of the plastic is conveyed to a steam boiler through the exhaust hole at the top of the gasification chamber, and in addition, the cooling water pipe in the interlayer of the plasma reaction kettle conveys the heat generated when the plasma reaction kettle works to the steam boiler through the second water outlet and the second recovery pipeline;

s4: the ash and slag discharged from the discharge port pass through the heat exchanger, the heat exchanger carries out cooling heat exchange on the ash and slag, the energy after heat exchange is conveyed into the steam boiler through a third recovery pipeline, and the ash and slag after heat exchange are introduced into a recovery area;

s5: the synthetic gas discharged from the exhaust port is conveyed into a steam boiler through a first recovery pipeline, is discharged into a waste gas treatment system from a waste gas outlet after being utilized by the steam boiler, is treated by a second waste heat recovery device, an acid-removing quenching tower, a filtering device, a first dust removal device, a second dust removal device and a denitration device of a secondary combustion chamber in the waste gas treatment system, and finally is discharged from a chimney under the action of an induced draft fan, wherein the gas meets the emission standard.

Compared with the prior art, the invention has the beneficial effects that: the invention

1. The waste solar panels are firstly subjected to preliminary disassembly and sorting, and then the easily recycled glass, aluminum frames, cables and joints are directly recycled;

2. the existing solar panel plastic which is difficult to treat is treated by adopting a plasma technology, so that compared with the traditional technology, the treatment is more thorough, and secondary pollution is avoided;

3. the waste gas after plasma treatment is treated by a waste gas system, and the discharged waste gas is treated in multiple steps, so that the discharged gas is ensured to be pollution-free;

4. through the cooling system and the preheating recovery system, the waste gas heat generated by the reaction of the plastics in the plasma reaction kettle can be recovered, the waste heat generated in the treatment process is fully utilized, and the energy consumption is further reduced.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a block diagram of the system of the present invention;

FIG. 2 is a schematic structural view of the present invention;

FIG. 3 is a schematic view of a preheating apparatus according to the present invention;

FIG. 4 is a schematic diagram of a plasma processing system according to the present invention;

FIG. 5 is a schematic view of an exhaust treatment system according to the present invention.

In the drawings, the components represented by the respective reference numerals are listed below:

1. a pretreatment system; 2. a crushing delivery system; 201. a first conveying belt; 202. a pulverizer; 203. a screw elevator; 204. a preheating device; 2041. a preheating box; 2042. a first feeding hole; 2043. a second conveying belt; 2044. a steam inlet; 2045. a discharge port; 3. a plasma processing system; 301. a plasma reaction kettle; 302. a gasification chamber; 303. a melting chamber; 304. a settling chamber; 305. a plasma generator; 306. an interlayer; 307. a cooling water pipe; 308. an exhaust port; 309. a discharge outlet; 310. a second feeding hole; 311. a water outlet; 4. an exhaust gas treatment system; 401. a secondary combustion chamber; 402. a second waste heat recovery device; 403. a deacidification quench tower; 404. a filtration device; 405. a first dust removal device; 4051. a baffle plate; 4052. an ash outlet; 406. a second dust removal device; 407. a denitration device; 408. a chimney; 409. an induced draft fan; 410. a gas line; 5. a cooling system; 501. a heat exchanger; 6. a preheating recovery system; 601. an exhaust line; 602. a first recovery pipeline; 603. a second recovery pipeline; 604. a third recovery pipeline; 605. an exhaust fan; 7. a steam boiler; 701. an exhaust gas outlet; 8. a recovery zone.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

Referring to fig. 1-5, the present invention provides a technical solution: a system for treating waste photovoltaic cell panels by using a plasma technology comprises a pretreatment system 1, a crushing and conveying system 2, a plasma treatment system 3, a waste gas treatment system 4, a cooling system 5 and a preheating and recycling system 6, wherein the pretreatment system 1 is used for disassembling and sorting the recycled photovoltaic cell panels and conveying the sorted plastic products to the crushing and conveying system 2; the crushing conveying system 2 is used for conveying, crushing and preheating the sorted plastic products; the plasma processing system 3 is used for carrying out plasma processing on the sorted plastic products; the waste gas treatment system 4 is used for treating the waste gas after plasma treatment; the cooling system 5 is used for cooling and recovering the slag after plasma treatment and introducing the cooled slag into a recovery area 8; the preheating recovery system 6 is used for recovering heat generated in the plasma treatment process;

and the device also comprises a steam boiler 7 and a recovery area 8, wherein the steam boiler 7 is respectively connected with the crushing conveying system 2, the plasma processing system 3 and the cooling system 5.

In this embodiment, pretreatment system 1 is for adopting automatic robot to accomplish the work of disassembling and sorting of retrieving solar panel, belongs to prior art.

In this embodiment, smash conveying system 2 includes a conveyer belt 201, rubbing crusher 202, screw elevator 203, preheating device 204, a conveyer belt 201 carries the plastics of sorting to rubbing crusher 202 top, carries pending plastics to smash in rubbing crusher 202 through a conveyer belt 201 for the fritter plastics after smashing are changeed and are handled, the discharge end of rubbing crusher 202 bottom is connected in the feed end of screw elevator 203, the top discharge end of screw elevator 203 connect in preheating device 204, carry the plastics after smashing to preheating device 204 through screw elevator 203.

In the above embodiment, the preheating device 204 includes a preheating box 2041, the top and the bottom of the outer wall of the preheating box 2041 are respectively provided with a feeding port 2042 and a discharging port 2045 which are located below the discharging end at the top end of the screw elevator 203, a plurality of second conveying belts 2043 are horizontally staggered in the preheating box 2041, the discharge ends of the second conveying belts 2043 at the bottom layer are positioned at one side of the discharge hole 2045, the bottom of the inner cavity of the preheating box 2041 is uniformly provided with a steam inlet 2044, the crushed plastic enters the preheating box 2041 from a first feed inlet 2042, and a plurality of second conveyor belts 2043 are horizontally arranged in a staggered manner for conveying, the steam generated by the boiler 7 can be delivered to the steam inlet 2044 through the exhaust pipeline 601 and the exhaust fan 602, then the plastic entering the preheating box 2041 is uniformly preheated, and the preheated plastic is sent into the plasma processing system 3 for plasma processing.

In this embodiment, the plasma processing system 3 includes a plasma reaction kettle 301, the inner cavity of the plasma reaction kettle 301 is sequentially a gasification chamber 302, a melting chamber 303 and a precipitation chamber 304 from top to bottom, a plasma generator 305 is installed on the inner wall of the melting chamber 303, the inner wall of the plasma reaction kettle 301 is provided with an interlayer 306, the inner part of the interlayer 306 is spirally wound with a cooling water pipe 307, the top end and the bottom end of the plasma reaction kettle 301 are respectively provided with an exhaust port 308 and a discharge port 309, the outer wall of the plasma reaction kettle 301 is provided with a second feed inlet 310 connected with a discharge port 2045, and the second feed inlet 310 is located above the plasma generator 305. The preheated plastic enters the melting chamber 303 and is acted by the plasma reaction kettle 301, so that the plastic treatment process is more complete and the gasification is more thorough, the waste slag generated by the melted plastic falls into the settling chamber 304 and is then discharged through the discharge port 309, the reacted synthesis gas is discharged through the exhaust port 308 above the gasification chamber 302, in addition, a cooling water pipe 307 is spirally wound in an interlayer 306 of the inner wall of the plasma reaction kettle 301, the steam boiler 7 can directly heat the cooling water flowing out of the cooling water pipe 307 of the plasma reaction kettle 301, the cooling water absorbs a large amount of heat emitted by the plasma reaction kettle 301 in the process of the plasma reaction kettle 301, the temperature is higher, the steam boiler 7 directly heats the cooling water, the energy required by the vaporization of the cooling water is greatly reduced, and the waste heat in the cooling water is fully utilized, further reducing the energy consumption.

In this embodiment, the exhaust gas treatment system 4 includes the gas pipeline 410, the one end of gas pipeline 410 is connected with the exhaust gas outlet 701 of steam boiler 7, the other end of gas pipeline 410 connects gradually second 402, the deacidification quench tower 403, filter equipment 404, the first 405, the second 406, the denitrification facility 407, chimney 408 and the draught fan 409 of secondary combustion chamber waste heat recovery device, can carry out the processing of multistep to the exhaust gas that the exhaust gas outlet 701 of steam boiler 7 discharged to guarantee that the exhaust gas is pollution-free.

In this embodiment, the preheating recovery system 6 includes an exhaust pipe 601, a first recovery pipe 602, a second recovery pipe 603, and a third recovery pipe 604, one end of the exhaust pipe 601 is connected to the steam boiler 7, the other end of the exhaust pipe 601 is connected to the steam inlet 2044 through the exhaust fan 605, the first recovery pipe 602 is connected between the steam boiler 7 and the exhaust port 308, and the second recovery pipe 603 is connected between the steam boiler 7 and the water outlet 311 of the cooling water pipe 307.

With reference to the above embodiment, the cooling system 5 employs the heat exchanger 501, the third recycling pipeline 604 is connected between the heat exchanger 501 and the steam boiler 7, the discharge port 309 penetrates through the heat exchanger 501 through a pipeline and is connected with the recycling area 8, a slag discharge valve is installed on the pipeline connected with the discharge port 309 and located in front of the heat exchanger 501, exhaust gas preheating generated in the heat exchanger 501 and the plasma reaction kettle 301 and heat generated in the heat exchanger can be recycled, benefits are provided for the steam boiler 7, energy required by the system can be provided through the steam boiler 7, and energy consumption is reduced.

In this embodiment, the inside of the filtering device 404 is activated carbon and slaked lime, the first dust removing device 405 is a baffle plate gravity dust removing device, the second dust removing device 406 is a cloth bag dust removing device, the first dust removing device 405 includes baffle plates 4051 arranged on the inner wall of the first dust removing device 405 in a staggered manner, and the bottom of the first dust removing device 405 is provided with an ash outlet 4052.

Example 2

s1: the automatic robot is adopted to complete the disassembly and sorting work of the recovered solar panel, and two thirds of glass becomes cullet after being recovered and is sent to the glass manufacturing industry; the aluminum frame is sent to an aluminum refinery; the recovered silicon can be reused in precious metal industry; the remaining cables and splices are crushed and sold in the form of copper beads; the waste plastics are conveyed into a crusher 202 through a first conveying belt 201 to be crushed;

s2: conveying the plastic crushed by the crusher 202 to the preheating device 204 through the screw elevator 203, supplying preheating energy of the preheating device 204 through an exhaust pipeline 601 and an exhaust fan 605 connected with the steam boiler 7, and introducing the plastic preheated by the preheating device 204 into the plasma reaction kettle 301 for treatment;

s3: the plastic enters the plasma reaction kettle 301 through the second feeding hole 310, the melted organic matters of the plastic are discharged through the discharge hole 309 at the bottom of the interlayer 306 under the action of the plasma generator 305 for retreatment, the melted synthetic gas of the plastic is conveyed to the steam boiler 7 through the exhaust hole 308 at the top of the gasification chamber 302, and in addition, the cooling water pipe 307 in the interlayer 306 of the plasma reaction kettle 301 conveys the heat generated during the operation of the plasma reaction kettle 301 to the steam boiler 7 through the water outlet 311 and the second recycling pipeline 603;

s4: the ash discharged from the discharge port 309 passes through the heat exchanger 501, the heat exchanger 501 cools and exchanges heat with the ash, the energy after heat exchange is transmitted into the steam boiler 7 through the third recovery pipeline 604, and the ash after heat exchange is introduced into the recovery area 8;

s5: the synthesis gas discharged from the exhaust port 308 is conveyed into the steam boiler 7 through the first recovery pipeline 602, is discharged into the exhaust gas treatment system 4 from the exhaust gas outlet 701 after being utilized by the steam boiler 7, and is treated by the second secondary combustion chamber waste heat recovery device 402, the second waste heat recovery device 402, the deacidification quenching tower 403, the filtering device 404, the first dust removal device 405, the second dust removal device 406 and the denitration device 407 in the exhaust gas treatment system 4, and finally, the gas meeting the emission standard is discharged from the chimney 408 under the action of the draught fan 409.

In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A system for treating waste photovoltaic panels by plasma technology, characterized in that: comprising a pretreatment system (1), a pulverizing conveying system (2), a plasma treatment system (3), an exhaust gas treatment system (4), a cooling system (5) and the preheat recovery system (6),

The pretreatment system (1) is used for dismantling and sorting the recovered photovoltaic solar panels, and transporting the sorted plastic products to the crushing and conveying system (2);

The pulverizing and conveying system (2) is used for conveying, pulverizing and preheating the sorted plastic products;

The plasma treatment system (3) is used for plasma treatment of the sorted plastic products;

The exhaust gas treatment system (4) is used for treating the plasma-treated exhaust gas;

The cooling system (5) is used for cooling and recycling the plasma-treated slag, and passing the cooled slag into the recovery zone (8);

The preheat recovery system (6) is used to recover the heat generated in the plasma treatment process;

It also includes a steam boiler (7) and a recovery zone (8), the steam boiler (7) being respectively connected with the pulverizing conveying system (2), the plasma treatment system (3) and the cooling system (5).

2 . The system according to claim 1 , wherein the pretreatment system ( 1 ) uses an automatic robot to complete the dismantling and sorting of recycled solar panels. 3 .

3. A system for treating waste photovoltaic panels by plasma technology according to claim 1, wherein the crushing and conveying system (2) comprises a conveyor belt (201), a crusher (202), a screw elevator (203), a preheating device (204), the conveyor belt 1 (201) transports the sorted plastics to the top of the pulverizer (202), and the discharge end of the bottom end of the pulverizer (202) is connected to the screw elevator The feed end of the machine (203), and the top discharge end of the screw elevator (203) is connected to the preheating device (204).

4. A system for treating waste photovoltaic panels using plasma technology according to claim 3, wherein the preheating device (204) comprises a preheating box (2041), and the preheating box (2041) has a The top and the bottom of the outer wall are respectively provided with a feed port (2042) and a discharge port (2045) located below the top discharge end of the screw elevator (203). A plurality of second conveyor belts (2043), the discharge end of the second conveyor belt (2043) on the bottom layer is located on one side of the discharge port (2045), and the bottom of the inner cavity of the preheating box (2041) is evenly provided with a steam inlet (2044).

5. The system according to claim 4, characterized in that: the plasma treatment system (3) comprises a plasma reaction kettle (301), and the plasma reaction kettle ( The inner cavity of 301) is a gasification chamber (302), a melting chamber (303) and a precipitation chamber (304) from top to bottom, and a plasma generator (305) is installed on the inner wall of the melting chamber (303). The inner wall of the plasma reactor (301) is provided with an interlayer (306), and a cooling water pipe (307) is spirally wound inside the interlayer (306), and the top and bottom ends of the plasma reactor (301) are respectively An exhaust port (308) and a discharge port (309) are opened, and the outer wall of the plasma reaction kettle (301) is provided with a feed port two (310) connected with the discharge port (2045). The second port (310) is located above the plasma generator (305).

6. A system for treating waste photovoltaic panels using plasma technology according to claim 5, characterized in that: the exhaust gas treatment system (4) comprises a gas pipeline (410), and the gas pipeline (410) has a One end is connected to the exhaust gas outlet (701) of the steam boiler (7), and the other end of the gas pipeline (410) is connected to the secondary combustion chamber waste heat recovery device 2 (402), waste heat recovery device 2 (402), Acid quenching tower (403), filter device (404), dust removal device 1 (405), dust removal device 2 (406), denitration device (407), chimney (408) and induced draft fan (409).

7. A system for treating waste photovoltaic panels using plasma technology according to claim 6, characterized in that: the preheating recovery system (6) comprises an exhaust pipeline (601), a recovery pipeline one (602) , recovery pipeline two (603) and recovery pipeline three (604), one end of the exhaust pipeline (601) is connected to the steam boiler (7), and the other end of the exhaust pipeline (601) passes through The exhaust fan (605) is connected with the steam inlet (2044), the recovery line one (602) is connected between the steam boiler (7) and the exhaust port (308) respectively, the recovery line two (603) They are respectively connected between the steam boiler (7) and the water outlet (311) of the cooling water pipe (307).

8. A system for treating waste photovoltaic panels using plasma technology according to claim 7, characterized in that: the cooling system (5) adopts a heat exchanger (501), and the recovery pipeline three (604) is connected to Between the heat exchanger (501) and the steam boiler (7), the discharge port (309) runs through the heat exchanger (501) through a pipeline, and is connected to the recovery zone (8), and the discharge port (309) A slag discharge valve is installed on the pipeline connected to (309) and located in front of the heat exchanger (501).

9 . The system for treating waste photovoltaic panels by plasma technology according to claim 6 , wherein the filter device ( 404 ) contains activated carbon and slaked lime, and the dust removal device ( 405 ) is a baffle plate. 10 . Gravity dust removal device, the second dust removal device (406) is a bag dust removal device; The bottom of (405) is provided with an ash outlet (4052).

10. A method for using plasma technology to process waste photovoltaic panels, characterized in that it specifically comprises the following steps:

S1: The dismantling and sorting of recycled solar panels is completed by automatic robots. Two-thirds of the glass is recovered as broken glass and sent to the glass manufacturing industry; the aluminum frame is sent to the aluminum refinery; the recycled Silicon can be reused in the precious metal industry; the remaining cables and connectors will be crushed and sold in the form of copper beads; and waste plastics will be transported to the crusher (202) by conveyor belt one (201) for crushing;

S2: The plastic pulverized by the pulverizer (202) is transported to the preheating device (204) through the screw elevator (203), and the preheating energy of the preheating device (204) is passed through the exhaust pipe connected to the steam boiler (7). The road (601) and the exhaust fan (605) are supplied, and the plastic preheated by the preheating device (204) is passed into the plasma reactor (301) for processing;

S3: The plastic enters the plasma reactor (301) through the second feeding port (310), and the molten organic matter of the plastic is passed through the discharge port (309) at the bottom of the interlayer (306) under the action of the plasma generator (305). ) is discharged for reprocessing, and the melted synthesis gas of the plastic is transported to the steam boiler (7) through the exhaust port (308) at the top of the gasification chamber (302). In addition, the interlayer of the plasma reactor (301) The cooling water pipe (307) in (306) transports the heat generated when the plasma reactor (301) works to the steam boiler (7) through the water outlet (311) and the second recovery pipe (603);

S4: The ash and slag discharged from the discharge port (309) passes through the heat exchanger (501), the heat exchanger (501) performs cooling and heat exchange on it, and the energy after heat exchange is transported to the steam through the recovery pipeline three (604). in the boiler (7), and the heat-exchanged ash is passed into the recovery zone (8);

S5: The synthesis gas discharged from the exhaust port (308) is transported to the steam boiler (7) through the recovery pipeline 1 (602), and after being utilized by the steam boiler (7), it is discharged from the exhaust gas outlet (701) to the exhaust gas treatment system ( 4), the waste heat recovery device 2 (402), the waste heat recovery device 2 (402), the acid removal quenching tower (403), the filter device (404), the dust removal device 1 in the exhaust gas treatment system (4) (405), the second dust removal device (406), and the denitration device (407) process the gas discharged from the steam boiler (7), and finally, under the action of the induced draft fan (409), the gas that meets the emission standard is removed from the chimney (408) ) is discharged.