Waste circuit board two-stage type steel strip vacuum thermal decomposition device

Abstract

The invention discloses a waste circuit board two-stage type steel strip vacuum thermal decomposition device. A first solenoid valve is arranged at one end of a waste circuit board feeding hopper, andthe waste circuit board feeding hopper and the first solenoid valve are connected through a pipeline. A vacuum feeding device is arranged in an outlet of the first solenoid valve, a first automatic control device is fixedly installed on the outer surface of the vacuum feeding device, and an exhaust outlet of the vacuum feeding device is connected with a first vacuum pump through a pipeline. A second solenoid valve is arranged in an outlet of the vacuum feeding device, and a thermal decomposition furnace is fixedly installed at one end of an outlet of the second solenoid valve. A third solenoid valve is arranged in an outlet of the thermal decomposition furnace, a vacuum discharging device is fixedly installed at one end of an outlet of the third solenoid valve, a second automatic controldevice is fixedly installed at the top end of the vacuum discharging device, and an exhaust outlet of the vacuum discharging device is connected with a second vacuum pump through a pipeline. A discharging hopper is fixedly installed in an outlet of a cooling section. By the adoption of the scheme, the continuous vacuum thermal decomposition is achieved, and therefore a large amount of energy is saved.

Description

technical field [0001] The invention relates to the field of pyrolysis furnaces, and more specifically, the invention relates to a two-stage steel strip vacuum pyrolysis device for waste circuit boards. Background technique [0002] Discarded printed circuit boards are the fundamental building blocks of electronics and are found in all electronic products, from personal computers to mobile phones to home appliances. China has now become the world's second largest producer of circuit boards, and the growth rate of waste wire boards exceeds that of any other type of waste. Waste circuit boards are rich in recyclable resources such as metals, plastics, and glass fibers. Therefore, reasonable disposal and resource recovery of discarded circuit boards are important parts of electronic waste recycling. [0003] A lot of research has been done on the treatment methods of electronic waste at home and abroad, and some methods have been applied to industrial production. At present,...

AI Technical Summary

Problems solved by technology

There are two problems: under a nitrogen atmosphere, the temperature of the pyrolysis section is high, and subsequent separation and recycling of pyrolysis gas is difficult; the one-stage steel strip has to go through a cycle of heating, cooling, and reheating, resulting in a lot of waste of heat

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