Method and device for treating waste circuit boards or carbon fiber composite materials

Abstract

The invention provides a method for treating waste circuit boards or carbon fiber composite materials. According to the method, the recycled waste circuit boards or carbon fiber composite materials are placed into a closed space; liquid water is heated to gas-state water molecules, high-temperature gas-state water molecule heat energy is formed, the gas-state water molecules are utilized as heat transmission media, and the heat transmission efficiency is high; meanwhile, the gas-state water molecules are continuously introduced into the closed space in which the waste circuit boards or carbonfiber composite materials are loaded through a gas output pipeline, firstly, the gas-state water molecules discharge air in the closed space so that the closed space with an oxygen-free environment can be formed, then organic matter in the waste circuit boards or carbon fiber composite materials is heated and decomposed under the high-temperature effect of the gas-state water molecules, and carbonblack, carbon fiber, water, carbon dioxide, carbon monoxide and other impurity tail gas are generated; and the carbon black, the carbon fiber or metal material copper plates in the circuit boards arecollected, and the tail gas is introduced into a gas purifier to be vented after being cooled through a heat exchanger along with the gas-state water molecules.

Description

technical field [0001] The invention relates to a method and a device for treating waste circuit boards or carbon fiber composite materials. Background technique [0002] With the acceleration of the replacement of information equipment, the recycling and reuse of printed circuit boards, which are an important part of electronic products, has gradually become a topic of increasing concern. China is a big consumer of electronic products, followed by the production of at least 100,000 tons of waste circuit boards or carbon fiber composite materials every year. There are a lot of toxic substances in waste circuit boards or carbon fiber composite materials, if not handled properly, it is likely to bring about great social and environmental problems. [0003] At present, there are many recycling methods for waste circuit boards, such as chemical methods such as heat treatment, dissolution, electrolysis and pickling, but these methods will cause secondary pollution to the environ...

AI Technical Summary

Problems solved by technology

[0003] At present, there are many recycling methods for waste circuit boards, such as chemical methods such as heat treatment, corrosion, electrolysis and pickling, but these methods will cause secondary pollution to the environment

[0004] As a reinforcing fiber for high-strength composite materials, carbon fiber is in increasing demand with the rapid development of the aviation and automotive industries. For non-degradable carbon fiber composite waste, it is mainly incinerated to utilize the heat energy generated by its combustion. Although this recycling method is simple and easy to implement, during the incineration process, composite material waste will release a large amount of toxic gas, and the ash after landfill and incineration will cause secondary pollution to the soil. Therefore, industrially developed countries have strictly It is expressly prohibited to dispose of composite waste in this way

Images