System and method for recycling batteries

Abstract

The invention discloses a system for recycling batteries. The system comprises a combustion chamber of a rotary kiln, a secondary combustion chamber and flue gas purification equipment; the combustion chamber of the rotary kiln comprises a first combustion area and a second combustion area; the secondary combustion chamber is communicated with the combustion chamber of the rotary kiln; the flue gas purification equipment is communicated with the secondary combustion chamber. By the aid of the system for recycling the batteries, the batteries are combusted in the first combustion area at the temperature ranging from 100 DEG C to 150 DEG C for 30 to 60 minutes, so that sealing rings of the batteries are sufficiently damaged by means of pyrolysis, hydrogen and organic solvents in the batteries are released and are discharged by negative-pressure devices, and the batteries can be effectively prevented from being exploded at a high temperature; then the batteries are combusted in the secondary combustion area at the temperature ranging from 300 DEG C to 500 DEG C, first flue gas generated when the batteries are combusted is completely combusted in the secondary combustion chamber at the temperature ranging from 1200 DEG C to 1350 DEG C to form second flue gas, the second flue gas is purified by the flue gas purification equipment to form purified gas, and the purified gas is exhausted into the atmosphere. The system for recycling the batteries has the advantages that the batteries are prevented from being exploded, and the system is safe in operation. The invention further provides a method for recycling the batteries.

Description

technical field [0001] The invention relates to the field of waste battery treatment, in particular to a battery recovery treatment system and method. Background technique [0002] Due to its high energy density, light weight, long life and other excellent characteristics, secondary batteries are widely used in mobile phones, notebook computers, digital cameras and other communication tools, digital electronic products, power tools, electric vehicles and other fields. At present, my country has become the world's largest producer and consumer of secondary batteries. [0003] The demand for secondary batteries is increasing day by day. On the one hand, the contradiction between supply and demand of metal raw materials such as cobalt, nickel and lithium required for the production of secondary batteries will become more prominent; on the other hand, waste secondary batteries contain many toxic and harmful cobalt, Compounds of valuable metals such as nickel and manganese. If ...

AI Technical Summary

Problems solved by technology

At present, the incineration method is mainly used to pretreat waste secondary batteries. Since there is no professional pyrolysis furnace for pretreatment of waste secondary batteries, direct-fired incinerators are mostly used now. During the incineration process, some of the electrolyte and electrodes The components are converted into gases such as carbon dioxide and other harmful components through combustion, and some metals are volatilized with the fly ash during incineration, which is easy to cause secondary pollution

At the same time, the fly ash volatilizes and easily takes away a large amount of heat, so that the combustion of organic matter is not complete, and the burnout rate is not high.

[0006] Traditionally, when recycling waste secondary batteries, it is usually necessary to open the battery casing and recycle the materials in the battery casing, because the casing of the secondary battery has great strength and toughness, and is compatible with the activity in the casing. Substances are tightly bound together, may explode when heated or squeezed, unsafe to handle

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