A thermal treatment system and method for waste batteries in a thermal power plant

Abstract

The application discloses a thermal treatment system and method for waste batteries in a thermal power plant, wherein the thermal treatment system for waste batteries in the thermal power plant comprises an electric heating furnace; the electric heating furnace utilizes the electric energy generated by the thermal power plant to perform thermal treatment and recovery on the waste batteries; a tail gas discharge port of the electric heating furnace is communicated with a pulverized coal boiler of the thermal power plant, so that the tail gas generated in the process of treatment and recovery of the waste batteries by the electric heating furnace is fully combusted in the pulverized coal boiler and is subjected to harmless treatment through a flue gas treatment device of the thermal power plant. The system utilizes the surplus electric power of the thermal power plant to drive the electric heating furnace to perform thermal treatment on the waste batteries, so that the electric power cost for thermal treatment of the waste batteries can be greatly reduced; in addition, the waste water, waste gas, waste liquid, waste residue, dust and other substances generated in the treatment and recovery process of the waste batteries are treated by using the existing facilities in the thermal power plant, so that the environmental protection investment and operation cost for thermal treatment of the waste batteries are reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of waste battery recycling, in particular to a thermal treatment system and method for waste batteries in a thermal power plant. BACKGROUND

[0002] Waste batteries can be divided into primary waste batteries and secondary waste batteries. Among the primary batteries, the dry batteries for civilian use are the most widely used and the most scattered battery products, with an annual consumption of 8 billion in China. There are mainly two series of zinc-manganese and alkaline zinc-manganese, as well as a small amount of zinc-silver, lithium batteries and other varieties. Zinc-manganese batteries, alkaline zinc-manganese batteries and zinc-silver batteries generally use mercury or mercury compounds as corrosion inhibitors, and mercury and mercury compounds are highly toxic substances.

[0003] Secondary batteries are various electrochemical storage batteries, including lithium ion, lead-acid, lead-carbon, nickel-hydrogen, nickel-cadmium, sodium-sulfur, vanadium liquid sulfur, magnesium, nickel-zinc, zinc-air storage batteries. In recent years, the fastest growing is lithium ion batteries. In particular, with the rapid development of China's economy and the substantial improvement of people's living standards, the output and ownership of automobiles have increased dramatically, especially in recent years, the development of pure electric vehicles and the production, use and retirement of lithium ion power batteries. The recycling and reuse of lithium ion power batteries have become the focus of the industry.

[0004] There are three main methods for treating waste batteries internationally: solidification and deep burial, storage in waste mines, and recycling. The main treatment processes for recycling include solidification disposal, manual screening, dry method, wet method, and dry-wet combination method. However, in these treatment methods, the consumption of energy and the subsequent treatment of pollutants, waste and other harmful substances become the main difficulties in project implementation, resulting in a large number of dry methods, especially heat treatment methods, which have high energy consumption and difficulty in subsequent treatment of pollutants. Many projects are not cost-effective.

[0005] If the waste battery electric heating furnace heat treatment method can be combined with the thermal power plant, not only can the low-price electricity for peak regulation and frequency modulation of the thermal power plant be utilized, but also the power consumption cost of the electric heating furnace can be reduced, and the waste water, waste gas, waste residue, waste liquid and dust generated in the electric drying, baking, roasting and other heat treatment processes and other treatment processes can be treated in the thermal power plant using the existing facilities, which can greatly reduce the energy consumption cost and environmental protection investment of waste battery heat treatment. SUMMARY

[0006] (I) Invention purpose

[0007] The purpose of the present application is to provide a thermal treatment system and method for waste batteries in a thermal power plant to solve the problem of waste battery pollution.

[0008] (II) Technical solution

[0009] To solve the above problems, the first aspect of the present application provides a thermal power plant waste battery heat treatment system, comprising: an electric heating furnace; the electric heating furnace uses the electric energy generated by the thermal power plant to heat treat and recycle waste batteries, and the tail gas discharge port of the electric heating furnace is communicated with the pulverized coal boiler of the thermal power plant, so that the tail gas generated in the process of treating and recycling waste batteries by the electric heating furnace is fully combusted in the pulverized coal boiler and is harmlessly treated by the flue gas treatment device of the thermal power plant.

[0010] Further, it further comprises: a peak shaving and frequency modulation control platform; the peak shaving and frequency modulation control platform is integrated in the centralized control system of the thermal power plant, and controls the power supply and power consumption of the electric heating furnace, so as to respond to and meet the peak shaving and frequency modulation demand of the power grid on the thermal power plant.

[0011] Further, the electric heating furnace comprises: a feeding port, an electric heating furnace body, an electric heating pipe, a discharging pipe and an exhaust pipe; the feeding port is used for feeding waste batteries; the electric heating furnace body is used for containing the waste batteries; the electric heating pipe is connected with the power transmission and supply module of the thermal power plant, and is used for heating the waste batteries; the discharging pipe is used for discharging the heated products; and the output end of the exhaust pipe is communicated with the pulverized coal boiler of the thermal power plant, so that the tail gas generated in the process of treating and recycling waste batteries by the electric heating furnace is fully combusted in the pulverized coal boiler and is harmlessly treated by the flue gas treatment device of the thermal power plant.

[0012] Further, it further comprises: a high-temperature furnace flue pipeline; one end of the high-temperature furnace flue pipeline is communicated with the high-temperature furnace flue outlet of the pulverized coal boiler, and the other end is communicated with the electric heating furnace, so as to introduce the high-temperature furnace flue of the pulverized coal boiler into the electric heating furnace, and heat or heat preserve the electric heating furnace by using high-temperature flue gas.

[0013] Further, the electric heating furnace is internally provided with a high-temperature furnace flue heat exchanger; the flue gas side of the high-temperature furnace flue heat exchanger is communicated with the high-temperature furnace flue pipeline, so as to heat or preheat the electric heating furnace by using high-temperature furnace flue.

[0014] Further, the electric heating furnace is any one or a combination of more of an electric drying furnace, an electric baking furnace and an electric roasting furnace.

[0015] Further, the feeding port of the electric heating furnace is added with preprocessed waste batteries, and the waste batteries comprise primary batteries and secondary batteries.

[0016] Further, the secondary battery is one or a combination of more of lithium ion, lead acid, lead carbon, nickel hydrogen, nickel cadmium, sodium sulfur, vanadium liquid sulfur, magnesium, nickel zinc and zinc air storage batteries in electrochemical storage batteries.

[0017] Further, the system further comprises a waste battery pre-treatment device, which is used for screening and crushing the waste batteries.

[0018] Further, a waste outlet of the waste battery pre-treatment device is communicated with a waste treatment device of the thermal power plant, and the waste treatment device is used for harmless treatment of waste generated by the waste battery pre-treatment device in treating the waste batteries.

[0019] Further, the electric heating furnace uses any one or a combination of normal pressure metallurgy, normal pressure baking process and normal pressure roasting process to heat the waste batteries.

[0020] Further, the electric heating furnace uses any one or a combination of negative pressure or vacuum metallurgy, negative pressure or vacuum baking process and negative pressure or vacuum roasting process to heat the waste batteries.

[0021] According to another aspect of the present application, a thermal treatment method of waste batteries in a thermal power plant is provided, which comprises: discharging, crushing and screening the waste batteries to obtain recyclable sorting products; using any one or a combination of drying treatment, wet treatment and re-crushing treatment on the sorted materials to obtain first treatment products and other waste; baking the first treatment products to obtain second treatment products and other waste; crushing and sorting the second treatment products to obtain recyclable sorting products; feeding the remaining materials into an electric roasting furnace, which uses any one or a combination of normal pressure roasting, negative pressure roasting or vacuum roasting process; further crushing or sorting to obtain third treatment products, and after crushing and sorting, recyclable sorting products are obtained; and using treatment facilities in the thermal power plant to perform harmless treatment on waste gas, waste water, waste liquid, waste residue and dust generated in the above process.

[0022] (III) Beneficial Effects

[0023] The above technical solution of the present application has the following beneficial technical effects:

[0024] The present application uses the surplus power of the thermal power plant to drive the electric heating furnace to perform thermal treatment on the waste batteries, which can greatly reduce the power consumption cost of the thermal treatment of the waste batteries; and the waste water, waste gas, waste liquid, waste residue and dust generated in the treatment and recycling process of the waste batteries are treated by using the existing facilities in the thermal power plant, which reduces the environmental protection investment and operation cost of the thermal treatment of the waste batteries. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 is a structural schematic diagram of a thermal treatment system of waste batteries in a thermal power plant according to a first embodiment of the present application;

[0026] Figure 2is a structural schematic diagram of a thermal treatment system for waste batteries of a thermal power plant according to an optional embodiment of the present application;

[0027] Figure 3 is a structural schematic diagram of a thermal treatment system for waste batteries of a thermal power plant according to a second embodiment of the present application;

[0028] Figure 4 is a flow chart of a thermal treatment method for waste batteries of a thermal power plant according to an optional embodiment of the present application.

[0029] Reference Signs:

[0030] 1: electric heating furnace; 11: low-temperature electric baking furnace; 12: high-temperature electric baking furnace; 2: thermal power plant; 21: pulverized coal boiler; 22: flue gas treatment device; 23: steam turbine; 24: generator; 3: high-temperature furnace flue pipeline; 4: waste battery pretreatment device; 5: power grid. DETAILED DESCRIPTION

[0031] In order to make the objects, technical solutions and advantages of the present application clearer, further detailed description will be made to the present application with reference to the embodiments and the accompanying drawings. It should be understood that the description is only exemplary and is not intended to limit the scope of the present application. In addition, in the following description, the description of the known structures and technologies is omitted to avoid unnecessary confusion of the concept of the present application.

[0032] Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0033] In the description of the present application, it should be noted that the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0034] In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as there is no conflict.

[0035] Embodiment 1

[0036] As Figure 1As shown, in the first embodiment of the present invention, a thermal treatment and recycling system for waste batteries in a thermal power plant is provided, including a power plant power generation module, which is equipped with a pulverized coal boiler, a steam turbine, and a generator. It also includes a power transmission and distribution module and an electric heating furnace, which are interconnected. The exhaust gas from the electric heating furnace is fed into the furnace or flue of the pulverized coal boiler, where combustible gases are burned. Other flue gas and dust are treated harmlessly using the flue gas treatment facilities of the pulverized coal boiler. The system also includes a peak-shaving and frequency-regulating control platform, which is integrated into the thermal power plant. The centralized control system controls the power supply and power consumption of the electric heating furnace to respond to and meet the peak-shaving and frequency regulation requirements of the power grid for the thermal power plant. The system is also equipped with a high-temperature flue gas duct for the power plant boiler, which draws high-temperature flue gas from the power plant boiler and introduces it into the electric heating furnace for heating or insulation. The increase or decrease in the flow rate of the high-temperature flue gas from the power plant boiler responds to the peak-shaving load requirements of the power plant boiler for the thermal power plant. The electric heating furnace includes a low-temperature electric baking furnace and a high-temperature electric roasting furnace. A high-temperature flue gas heat exchanger is also installed in the electric heating furnace, which is connected to the high-temperature flue gas duct of the power plant boiler on the flue gas side, using the high-temperature flue gas from the power plant boiler to heat or preheat the electric heating furnace.

[0037] like Figure 2 As shown, in an optional embodiment of the present invention, a thermal treatment system for waste batteries in a thermal power plant is provided, comprising: an electric heating furnace; the electric heating furnace utilizes the electrical energy generated by the thermal power plant to perform thermal treatment and recycling of waste batteries, and the exhaust port of the electric heating furnace is connected to the pulverized coal boiler of the thermal power plant, so that the exhaust gas generated during the waste battery recycling process of the electric heating furnace is fully combusted in the pulverized coal boiler and then treated harmlessly by the flue gas treatment device of the thermal power plant; optionally, the electric heating furnace includes a feeding port, an electric heating furnace body, an electric heating tube, a discharge pipe, and an exhaust pipe, and the power supply bus of the electric heating tube is connected to the power transmission and transformation and power supply module. Pre-treated waste batteries are added to the feeding port of the electric heating furnace, and the waste batteries include primary batteries or secondary batteries. The secondary batteries are one or a combination of several of the following rechargeable electrochemical batteries: lithium-ion, lead-acid, lead-carbon, nickel-metal hydride, nickel-cadmium, sodium-sulfur, vanadium-sulfur, magnesium, nickel-zinc, and zinc-air batteries.

[0038] Example 2

[0039] like Figure 3As shown, in the present embodiment, the thermal treatment system for waste batteries in thermal power plants further comprises a peak load regulation and frequency modulation control platform on the basis of the above-mentioned embodiment. The peak load regulation and frequency modulation control platform is integrated in the centralized control system of the thermal power plant, controls the power supply and power consumption of the electric heating furnace, and makes the electric heating furnace respond to and meet the peak load regulation and frequency modulation demand of the power grid on the thermal power plant. While meeting the annual peak load regulation and frequency modulation demand of the power plant, the power consumption or heat cost of the waste battery thermal treatment recovery is reduced, and the profitability of the thermal power plant is increased.

[0040] Optionally, the electric heating furnace comprises a charging port, an electric heating furnace body, an electric heating pipe, a discharging pipe and an exhaust pipe. The charging port is used for feeding the waste batteries. The electric heating furnace body is used for containing the waste batteries. The electric heating pipe is connected with the power transmission and supply module of the thermal power plant, and is used for heating the waste batteries. The discharging pipe is used for discharging the heated products. The output end of the exhaust pipe is communicated with the pulverized coal boiler of the thermal power plant, so that the tail gas generated in the process of treating and recycling the waste batteries by the electric heating furnace is fully combusted in the pulverized coal boiler, and is harmlessly treated by the flue gas treatment device of the thermal power plant.

[0041] Optionally, the electric heating furnace further comprises a high-temperature flue gas pipeline. One end of the high-temperature flue gas pipeline is communicated with the high-temperature flue gas outlet of the pulverized coal boiler, and the other end of the high-temperature flue gas pipeline is communicated with the electric heating furnace. The high-temperature flue gas pipeline is used for introducing the high-temperature flue gas of the pulverized coal boiler into the electric heating furnace, and heating or insulating the electric heating furnace by using the high-temperature flue gas. The increase or decrease of the high-temperature flue gas flow extracted from the power station boiler is used to respond to the peak load regulation demand of the power grid on the power station boiler of the thermal power plant. The high-temperature flue gas or steam generated by the power plant is used to supplement the heat or insulate and heat the drying, baking and roasting processes of the waste battery thermal treatment, so as to reduce the energy consumption of the whole system.

[0042] Optionally, the electric heating furnace is internally provided with a high-temperature flue gas heat exchanger. The flue gas side of the high-temperature flue gas heat exchanger is communicated with the high-temperature flue gas pipeline, and the electric heating furnace is heated or preheated by using the high-temperature flue gas.

[0043] Optionally, the electric heating furnace is any one or a combination of electric drying furnace, electric baking furnace and electric roasting furnace.

[0044] Optionally, the charging port of the electric heating furnace is added with pre-processed waste batteries, and the waste batteries include primary batteries and secondary batteries.

[0045] Optionally, the secondary battery is one or a combination of lithium ion, lead-acid, lead-carbon, nickel-hydrogen, nickel-cadmium, sodium-sulfur, vanadium liquid sulfur, magnesium, nickel-zinc and zinc-air storage batteries.

[0046] Optionally, the waste battery pre-processing device is further included, which is used for screening and crushing the waste batteries. The waste battery pre-processing device utilizes the surplus power of the power plant for driving the crushing machine, grinding and crushing machine, and power magnetic separation machine, so as to reduce the power consumption of the waste battery processing technology.

[0047] Optionally, the waste outlet of the waste battery pre-processing device is communicated with the waste treatment device of the power plant, and the waste treatment device is used for harmless treatment of the waste generated by the waste battery pre-processing device. Specifically, the harmful substances such as waste gas, waste water, waste liquid, waste residue, and dust generated in the process of recycling the waste batteries, such as pre-processing, electric baking, electric roasting, electric calcination, post-processing, screening, or crushing, are treated by the treatment facilities in the power plant.

[0048] Optionally, the electric heating furnace uses any one or a combination of the normal pressure metallurgy method, normal pressure baking process, and normal pressure roasting process to heat the waste batteries.

[0049] Embodiment 3

[0050] In this embodiment, the electric heating furnace uses the high-temperature metallurgy method to recycle the waste lithium ion batteries. The high-temperature metallurgy method is any one or a combination of the negative pressure or vacuum metallurgy method, negative pressure or vacuum baking process, and negative pressure or vacuum roasting process.

[0051] The waste batteries and packaging are placed in the electric heating furnace for roasting, and no pre-processing is required before roasting. At the same time, the energy released by the combustion of graphite and organic solvents can be utilized to obtain high-purity compounds of cobalt and nickel, which are directly recycled as raw materials for battery production, realizing the recycling of metals.

[0052] The electric heating furnace is arranged in the power plant, and the low-cost operation of the electric heating furnace for high-temperature metallurgy treatment of lithium ion batteries is realized by using the low-price plant power or surplus power of the power plant for peak regulation and frequency regulation.

[0053] Embodiment 4

[0054] In this embodiment, the waste battery heat treatment system provided in the above embodiments is used to heat an electric furnace with surplus peak-shaving and frequency-modulated electricity. The electrode material is then heat-treated for 30 minutes in a nitrogen stream at temperatures of 400°C, 500°C, and 600°C, respectively. The active material is separated from the aluminum foil and then reassembled into a battery by adding a new binder, styrene-butadiene rubber (SBR) and sodium carboxymethyl cellulose (CMC). The results show that the material recovered after heat treatment at 500°C exhibits the highest discharge capacity, close to that of the original material, and has good cycle performance. This effect may be attributed to the carbonization of the CMC and SBR binder at 500°C, which increases the conductivity of the lithium iron phosphate active material.

[0055] Example 5

[0056] In this embodiment, during the recycling and processing of waste batteries using the thermal power plant waste battery thermal treatment system provided in the above embodiments, the electrolyte solution and other components in the electrodes of the waste batteries will be converted into carbon dioxide (CO2) or other harmful components, such as phosphorus pentoxide (P2O5), after combustion, which can easily cause air pollution. A special flue gas treatment device is set up before the flue gas treatment device of the power plant boiler or before the chimney to remove the toxic and harmful gases in the waste battery recycling process and ensure that the exhaust gas emission standards generated by waste batteries meet the local environmental protection requirements.

[0057] like Figure 4 As shown, in another aspect of the present invention, a method for thermal treatment of waste batteries from thermal power plants is provided, comprising:

[0058] S1: Discharge, crush and screen used batteries to obtain recyclable sorted products;

[0059] This step involves discharging the waste batteries and crushing them manually or mechanically. The crushed waste batteries are then manually, mechanically, or magnetically screened to obtain useful sorting products, such as copper, aluminum, and other metallic cathode materials.

[0060] S2: The sorted materials are subjected to any one or more combinations of drying, wet processing and re-crushing to obtain the first processed product and other waste.

[0061] The first product in this step is a metal cathode material such as copper or aluminum, while other waste refers to waste that cannot be recycled.

[0062] S3: The first processed product is baked to obtain the second processed product and other waste.

[0063] S4: The second processed product is crushed and sorted to obtain a recyclable sorted product;

[0064] S5: the remaining materials are sent to an electric calcining furnace, which uses any one or a combination of normal pressure calcination, negative pressure calcination or vacuum calcination process;

[0065] S6: further crushing or sorting to obtain a third processing product, and after crushing and sorting, a recyclable sorting product is obtained;

[0066] This step is to further crush or sort to obtain useful sorting products, such as rare metals, and to use the treatment facilities in the thermal power plant to harmlessly treat the generated waste gas, waste water, waste liquid, waste residue and dust.

[0067] S7: the waste gas, waste water, waste liquid, waste residue and dust generated in the above process are harmlessly treated by using the treatment facilities in the thermal power plant.

[0068] The present application aims to protect a thermal power plant waste battery heat treatment system, comprising: an electric heating furnace; the electric heating furnace uses the electric energy generated by the thermal power plant to heat treat and recycle waste batteries, and the tail gas discharge port of the electric heating furnace is communicated with the pulverized coal boiler of the thermal power plant, so that the tail gas generated in the process of heat treating and recycling waste batteries by the electric heating furnace is fully combusted in the pulverized coal boiler, and is harmlessly treated by the flue gas treatment device of the thermal power plant. The system uses the surplus power of the thermal power plant to drive the electric heating furnace to heat treat waste batteries, which can greatly reduce the power cost of waste battery heat treatment; the waste water, waste gas, waste liquid, waste residue, dust and other substances generated in the heat treatment and recycling process of waste batteries are treated by using the existing facilities in the thermal power plant, which reduces the environmental protection investment and operating cost of waste battery heat treatment.

[0069] It should be understood that the above specific embodiments of the present application are only used for illustrative or explanatory purposes of the principles of the present application, and do not constitute a limitation on the present application. Therefore, any modification, equivalent replacement, improvement, etc. made without departing from the spirit and scope of the present application shall be included in the protection scope of the present application. In addition, the appended claims of the present application are intended to cover all variations and modifications falling within the scope and boundary of the appended claims, or the equivalent forms of such scope and boundary.

Claims

1. A thermal treatment system for waste batteries from a thermal power plant, characterized by, Comprise: Electric heating furnace (1); The electric heating furnace (1) utilizes the electric energy generated by the thermal power plant to heat treat and recycle waste batteries, and the tail gas discharge port of the electric heating furnace (1) is communicated with the pulverized coal boiler (21) of the thermal power plant, so that the tail gas generated in the process of heat treatment and recycling of waste batteries by the electric heating furnace (1) is fully combusted in the pulverized coal boiler (21), and is harmless treated by the flue gas treatment device (22) of the thermal power plant; The peak shaving and frequency modulation control platform is integrated in the centralized control system of the thermal power plant, and controls the power supply and power consumption of the electric heating furnace (1), so that it responds to and meets the peak shaving and frequency modulation demand of the power grid (5) on the thermal power plant; The electric heating furnace (1) comprises a feeding port, an electric heating furnace body, an electric heating pipe, a discharge pipe and an exhaust pipe. The feeding port is used for feeding waste batteries. The electric heating furnace body is used for containing and heat treating the waste batteries. The power supply bus of the electric heating pipe is connected with the power transmission and supply module of the thermal power plant, and the electric heating pipe is used to heat treat the waste batteries by using the electric energy generated by the thermal power plant. The discharge pipe is used for discharging the solid products after heat treatment. The output end of the exhaust pipe is communicated with the pulverized coal boiler (21) of the thermal power plant, so that the tail gas generated in the process of heat treatment and recycling of waste batteries by the electric heating furnace (1) is fully combusted in the pulverized coal boiler (21), or is harmless treated by the flue gas treatment device (22) of the thermal power plant. The high-temperature furnace flue pipeline (3) is communicated at one end with the high-temperature furnace flue outlet of the pulverized coal boiler (21) and at the other end with the electric heating furnace (1), and is used to introduce the high-temperature furnace flue generated by the pulverized coal boiler (21) into the electric heating furnace (1), so as to heat or insulate the electric heating furnace (1) by using the high-temperature flue gas. The electric heating furnace (1) is internally provided with a high-temperature furnace flue heat exchanger, and the flue gas side of the high-temperature furnace flue heat exchanger is communicated with the high-temperature furnace flue pipeline (3), so as to heat or preheat the electric heating furnace (1) by using the high-temperature furnace flue. The waste batteries and packaging are put into the electric heating furnace for roasting, and no pretreatment is required before roasting, and the energy released by the combustion of graphite and organic solvents is utilized, so as to obtain high-purity compounds of cobalt and nickel.

2. The thermal treatment system for waste batteries of thermal power plants according to claim 1, characterized in that, The electric heating furnace (1) is any one or a combination of more than one of an electric drying furnace, an electric baking furnace and an electric roasting furnace.

3. The thermal treatment system for waste batteries of thermal power plant according to claim 1, characterized in that, The electric heating furnace (1) uses any one or a combination of more than one of normal pressure metallurgy, normal pressure baking process and normal pressure roasting process to heat the waste batteries.

4. The thermal treatment system for waste batteries of thermal power plant according to claim 1, characterized in that, The electric heating furnace (1) uses any one or a combination of more than one of negative pressure or vacuum metallurgy, negative pressure or vacuum baking process and negative pressure or vacuum roasting process to heat the waste batteries.

5. The thermal treatment system for waste batteries of thermal power plant according to claim 1, characterized in that, The feeding port of the electric heating furnace (1) adds the waste batteries after pretreatment, and the waste batteries include primary batteries and secondary batteries.

6. The system for thermal treatment of waste batteries of thermal power plants according to claim 5, characterized by the fact that, The secondary battery is one or a combination of more than one of lithium ion, lead acid, lead carbon, nickel hydrogen, nickel cadmium, sodium sulfur, vanadium liquid sulfur, magnesium, nickel zinc and zinc air storage batteries.

7. The system for thermal treatment of waste batteries of thermal power plants according to any of claims 1 - 6, characterized in that, Further comprise: Waste battery pretreatment device (4); The waste battery pretreatment device (4) is used for screening and crushing of waste batteries.

8. The thermal treatment system for waste batteries of thermal power plants according to claim 7, characterized in that, The waste outlet of the waste battery pretreatment device (4) is communicated with a waste treatment device of the thermal power plant, and the waste treatment device is used for harmless treatment of waste generated by the waste battery pretreatment device (4) in treating waste batteries.

9. A method for thermal treatment of waste batteries in a thermal power plant, characterized by, Comprise: Discharge, crush and screen the waste batteries to obtain recyclable sorting products; Dry, wet and re-crush the sorted materials to obtain first treatment products and other waste; Roast the first treatment products to obtain second treatment products and other waste; Crush and sort the second treatment products to obtain recyclable sorting products; Send the remaining materials into an electric roasting furnace, which uses any one or combination of normal pressure roasting, negative pressure roasting or vacuum roasting process; Further crush or sort to obtain third treatment products, and obtain recyclable sorting products after crushing and sorting; Use the treatment facilities in the thermal power plant to harmlessly treat the waste gas, waste water, waste liquid, waste residue and dust generated in the above process; Control the power supply and power consumption of the electric heating furnace (1) to respond to and meet the peak shaving and frequency modulation demand of the power grid (5) on the thermal power plant; Use the electric energy generated by the thermal power plant to heat treat the waste batteries by using the electric heating pipe; Make the tail gas generated in the process of heat treating the waste batteries by the electric heating furnace (1) fully burn in the pulverized coal boiler (21); the electric heating furnace (1) is internally provided with a high-temperature furnace flue heat exchanger; the flue gas side of the high-temperature furnace flue heat exchanger is communicated with a high-temperature furnace flue pipeline (3), and the high-temperature furnace flue is used to heat or preheat the electric heating furnace (1); One end of the high-temperature furnace flue pipeline (3) is communicated with the high-temperature furnace flue outlet of the pulverized coal boiler (21), and the other end is communicated with the electric heating furnace (1), which is used to introduce the high-temperature furnace flue generated by the pulverized coal boiler (21) into the electric heating furnace (1) to heat or insulate the electric heating furnace (1) by using the high-temperature flue gas; Put the waste batteries and packaging into the electric heating furnace (1) for roasting, which does not need pretreatment before roasting, and the energy released by the combustion of graphite and organic solvents is utilized to obtain high-purity compounds of cobalt and nickel.

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