PCB film residue reduction treatment system and method based on microwave thermal dehydration

Abstract

The invention discloses a PCB film residue reduction treatment system and method based on microwave thermal dehydration. The system includes a feeding system used for conveying the PCB film residues;a microwave treatment system connected with the discharging end of the feeding system and is used for carrying out the microwave treatment on the PCB film residues; a water vapor recovery system whichis connected with a water vapor output end of the microwave treatment system, and is used for recycling the water vapor generated in the microwave treatment system; a film residue recycling system which is connected with the film residue output end of the microwave treatment system and is used for recycling the film residues generated in the microwave treatment system, and a control system whichis used for controlling the feeding system, the microwave treatment system, the water vapor recycling system and the film residue recycling system to work. According to the technical scheme, the dehydration efficiency and the dehydration effect of the PCB film residues are improved, and the treatment cost is reduced.

Description

technical field [0001] The invention relates to the technical field of PCB film slag treatment, in particular to a PCB reduction treatment system and method based on microwave thermal dehydration. Background technique [0002] The solid waste produced in the film-removing process of the printed circuit board (PCB) manufacturing process is PCB film slag. PCB film slag is viscous as a whole, with high viscosity and poor water permeability. Its moisture content is greater than 60%, the surface is easy to crust, and the internal moisture cannot volatilize. PCB film slag is included in the "National Hazardous Waste List", and enterprises cannot dispose of it by themselves. If dehydration treatment is not carried out and a qualified treatment manufacturer is directly entrusted with incineration treatment, it will seriously affect the outsourcing treatment cost and increase the operating cost of the enterprise. At the same time, it will not be able to meet the government's environ...

AI Technical Summary

Problems solved by technology

PCB film slag is viscous as a whole, with high viscosity and poor water permeability. Its moisture content is greater than 60%, the surface is easy to crust, and the internal moisture cannot volatilize

PCB film slag is included in the "National Hazardous Waste List", and enterprises cannot dispose of it by themselves

If dehydration treatment is not carried out, but a qualified treatment manufacturer is directly entrusted to carry out incineration treatment, it will seriously affect the outsourcing treatment cost and increase the operating cost of the enterprise.

[0003] The existing membrane slag reduction treatment systems and methods generally adopt centrifugal dehydration, screw extrusion dehydration, acidification-filtration dehydration, the amount of water removed by this dehydration method is limited, and the membrane slag obtained after dehydration still contains a small part water, the dehydration efficiency is low, the dehydration effect is poor, and the cost of outsourcing the final membrane slag is still high

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