Tail gas treatment device and tail gas treatment method in process of recycling waste printed circuit boards

Abstract

The invention discloses a tail gas treatment device and a tail gas treatment method in a process of recycling waste printed circuit boards. The tail gas treatment method comprises the following steps: performing active carbon adsorption treatment on tail gas to be treated firstly, and filtering solid dust, heavy metal particles, part of inorganic nonmetal oxide and part of organic gas in the tail gas; then introducing the pretreated tail gas into a spray tower, fully contacting the pretreated tail gas with a purification solution in the spray tower, and removing most of inorganic nonmetal oxide and part of organic gas in the pretreated gas; finally, introducing the tail gas exhausted out of the top of the spray tower into a high-temperature combustion device so as to perform combustion, and discharging non-pollution tail gas through the combustion treatment device. Through the tail gas treatment device and the tail gas treatment method, the secondary pollution problem caused by the discharged tail gas in the process of recycling the waste printed circuit boards is effectively solved; meanwhile, part of combustible gas in the tail gas is used, so that a certain economic value is achieved.

Description

technical field [0001] The invention relates to a tail gas treatment device and method in the recycling process of waste printed circuit boards. Background technique [0002] Printed Circuit Board (PCB for short) is an important part of electronic and electrical products and is widely used in various electronic and electrical equipment. With the rapid growth of China's economy, especially the rapid development of the manufacturing industry, the amount of waste electrical and electronic equipment continues to increase, and the recycling of waste printed circuit boards has become a thorny issue facing the society. [0003] In the recycling process of printed circuit boards, because there are many kinds of electronic components distributed on them, these electronic components need to be removed first. The most effective electronic component removal technology currently recognized is to use a certain method to heat the soldering surface of the PCB board, so that the solder poin...

AI Technical Summary

Problems solved by technology

This technology is only aimed at the exhaust gas produced during the process of extracting glass fibers from waste PCB boards, and only part of the solid particles in the exhaust gas can be deposited by liquid immersion, but cannot effectively remove harmful organic gases and very fine metal fumes.

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