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The discarded lithium batteries contains a large amount of non-renewable and high economic value of heavy metal resources; the positive lithium battery is lithium cobalt acid powder and the negative electrode material is graphite powder, and both the positive and negative electrode contain large quantities of cobalt, nickel, manganese, copper, aluminum and other metal materials. If it can be recycled, it can avoid the waste of heavy metal resources. Therefore, due to the resource tension and the need to improve the environment, all countries in the world will pay great attention to the recycling and utilization of waste lithium batteries.
In the process of recycling and processing of waste lithium batteries, Mainly using the dry recovery technology and the wet recovery technology, Wet recovery technology has a long process route, large investment, more equipment, Unable to recycle the metal aluminum, And the wet process can not dispose of the PVDF in the lithium battery; Dry method recovery technology is mainly divided into high temperature (~800℃) dry technology and low temperature (~400℃) dry technology technology, Short dry process recovery technology route, less equipment, Can effectively handle the PVDF in it, But with a high energy consumption, It consumes a lot of heat, Dry treatment shall produce acid gas HF (or other hydrogen halidegas) and cracking waste gas of organic matter, To be handled separately, Otherwise, it will have a great impact on the environment, The investment in environmental protection facilities is huge; Lithium battery recycling and treatment equipment includes disassembly line (ladder reuse) + grinding and crushing air selection line + extraction (reverse extraction) production line, Among them, grinding and crushing the air selection line (that is, beating the powder line) is the most important, Waste lithium battery powder line is the key of lithium battery recycling equipment, But many domestic manufacturers still apply the process of a certain place, that is, tear and break + secondary crushing, grinding + air selection (outsourcing high school warm furnace), Did not solve the flammable and explosive problem of live waste lithium batteries from the source, And the processing cost is close to 3,000.00 yuan / ton, We introduce foreign advanced technology, Underformed technological reform, The feed part of the self-produced high temperature pyrolysis furnace is designed with frequency conversion speed regulation to form a high temperature vacuum zone, Fundamentally solve the problem of fire prevention and explosion prevention of the tearing machine, And greatly reduce the paper equipment and its production and operation costs, This unique process of lithium battery recycling and processing equipment production line greatly reduces the equipment and production operation cost because it does not use nitrogen and other oxygen separator, Therefore, we solemnly launched at the same time, rent before purchase, contract contract and other forms of cooperation, Welcome to inquire!
Waste lithium battery recycling and treatment system, Including waste lithium battery recovery and treatment device and waste gas treatment device, The waste lithium battery recovery and treatment device includes the lithium battery recovery pretreatment tearing device, pyrolysis device, lithium battery recovery postprocessing (including secondary crushing grinding and air selection equipment) device; The pyrolysis device includes the pyrolysis furnace and the frequency conversion air volume control device, The successively connected production preprocessing unit, dry rotary furnace integration, reprocessing unit, Dry rotary furnace integrated exhaust port three-dimensional connection treatment tearing device outlet and production environmental protection device; The cracking waste gas outlet of the pyrolysis furnace is connected with the environmental protection device; In addition, in order to solve the problem of high energy consumption in the dry recycling and treatment of waste lithium batteries, This complete set of equipment also adopts the following preferred mode: the pyrolysis device also includes an external heat exchanger, The external heat exchanger is installed on the outside of the pyrolysis furnace; The air inlet of the external heat exchanger is connected to the high-temperature flue gas discharge outlet of the environmental protection device; The connection pipe between the cracking exhaust gas outlet of the pyrolysis furnace and the environmental protection device is equipped with an insulation sleeve; One branch pipe is connected to the air inlet of the external heat exchanger, And the branch pipe in the high temperature flue gas discharge outlet is equipped with a flow control device; The exhaust gas produced by the high temperature pyrolysis furnace enters the external heat exchanger of the pyrolysis device through the high temperature heat flue gas discharge outlet of the environmental protection device, As a heat source for the pyrolysis furnace.
The purpose of installing the flow regulation device at the high temperature flue gas discharge outlet is to control the air volume of the high temperature flue gas into the branch pipe through the flow regulation device, Furthermore, the temperature at the inlet of the external heat exchanger is 400℃ ~1000℃, It is preferred to control the temperature at the inlet of the external heat exchanger at 500℃ ~650℃, And to form a vacuum band, Make the shpper and pyrolysis furnace, Solve the problem of fire and explosion prevention in lithium battery recycling treatment from the source; And the waste lithium battery by the tearing machine after tearing through the pyrolysis furnace entrance into the pyrolysis furnace for the waste lithium battery contained organic matter pyrolysis treatment; The binder PVDF, lithium hexafluorophosphate and organic solvent contained in the waste lithium battery in the pyrolysis furnace are heated and decomposed, Formation of cracking waste gas; The cracking waste gas is burned to produce carbon dioxide, water, HF and other gases; Because the calcium oxide of the nanoscale particle size of the waste gas treatment device has extremely high activity at the working temperature, Can be rapidly bound to the HF, To generate calcium fluoride, Thus the HF does not enter the atmosphere, Similarly, the rest of the hydrogen halide gas produces a calcium halide, And other carbon dioxide emissions after the conventional treatment of environmental protection devices.
The beneficial effects of this equipment are:
1) in the high temperature pyrolysis disposal of waste lithium batteries, using the production process of waste lithium battery pyrolysis, no need for extensive use of natural gas to provide heat source, realize the waste heat recycling in the production process, at the same time solve the production device of high temperature exhaust gas cooling device, save the production device cooling system investment;
2) In the exhaust gas treatment, because the cracking waste gas has been burned through the high temperature pyrolysis furnace, the organic matter decomposition is completely and fully sufficient, and there is no need to set up the exhaust gas combustion device;
3) The waste gas containing fluorine and other halogens produced by pyrolysis is absorbed by calcium oxide, not required to prevent dioxins, and alkali spray system is not required to absorb HF, which greatly reduces the input of environmental protection facilities and the operation cost of environmental management; therefore, the disposal of waste lithium batteries can reduce the input of millions of yuan, and reduce the energy consumption of 500~1000 yuan / ton, and the effect of energy saving and consumption reduction is remarkable.
The recycling of waste lithium batteries is widely concerned, In particular, how to deal with charged lithium batteries has become an important problem, Waste lithium ion battery live crushing air selection equipment mainly deals with materials for power, energy storage before 3C monomer lithium ion battery and battery waste including cylinder, soft package, square type of common specifications of battery and battery residues, Its battery charged crushing device is that the battery can directly enter the crushing process without discharge, Greatly improve the production efficiency, Reduce operating costs; The equipment is equipped with oxygen real-time monitoring + temperature segment monitoring + video monitoring + PLC upper computer centralized chain control, Improve the safety of the technological process, Ensure a safe operation, The main advantages are given as follows:
1) The total power of the complete set of equipment is 300 kilowatts, and the consumption of live broken natural gas is less than 10m3；
2) The complete set of equipment covers an area of about 200 square meters (4 mx 50 m);
3) The high temperature heat treatment temperature of point crushing or liquid raw materials is 750 degrees to 900 degrees, and the exhaust gas into the cooling tower and cloth bag dust removal, activated carbon adsorption and emission after spraying;
4) After high temperature treatment, the treatment rate of organic battery reaches more than 98%, and the treatment rate of diaphragm glue reaches more than 95%;
5) The equipment environmental protection equipment is perfect, reasonable design, exquisite material selection, excellent processing, due to the production in Jiangsu, so the environmental protection equipment grade is high, including noise and waste water, waste gas treatment are fully meet the standard;
6) In the processing process of complete sets of equipment, the factory has a high completion rate and the design is reasonable, which greatly reduces the time of on-site installation and debugging, and the equipment installation is controlled within 15 days;
7) The special key point is that it is designed with domestic and foreign practical operation experience and practical production experience, with the leading level of similar products and independent production, so it has the advantages of low cost, safety and reliability, strong continuity and low energy consumption.
8) This complete set of equipment has stable production, low maintenance rate and obvious advantages in the industry; this complete set of equipment has the advantages of equipment integration, high land area and low energy consumption, and the recovery rate of black powder for primary treatment is not less than 98%.
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