Printing ink residue anaerobic pyrolysis treatment device and method

Abstract

The invention discloses a printing ink residue anaerobic pyrolysis treatment device and method, to-be-treated printing ink residues are pretreated through a printing ink residue pretreatment system, and pretreated printing ink residues are obtained; carrying out pyrolysis treatment on the pretreated printing ink residues by adopting preset low-pressure high-temperature superheated steam in a countercurrent direct contact manner through an anaerobic pyrolysis system; low-pressure saturated steam is generated by the steam generation system and is superheated by high-temperature flue gas, and low-pressure high-temperature superheated steam is obtained and provided for the anaerobic pyrolysis system; the flue gas treatment system is used for treating high-temperature flue gas from the steam generation system; and the flue gas treated by the flue gas treatment system is discharged through the flue gas discharge system. The self-sustaining operation of the device can be realized without additional energy after the device operates stably, the printing ink residue which is treated by the device and is originally classified as hazardous waste can be well utilized in a harmless, reduction and resource manner, and the device has the comprehensive advantages of low treatment cost, high treatment degree and low comprehensive energy consumption.

Description

technical field [0001] The invention relates to the technical field of PCB ink slag treatment, in particular to an oxygen-free pyrolysis treatment device and method for ink slag. Background technique [0002] Printed Circuit Board (PCB) is an important electronic component, a support for electronic components, and a carrier for electrical connections of electronic components. PCB ink refers to the ink used in PCB production, which is composed of pigments, coupling agents, organic solvents, auxiliary agents and other components, and is an important part of the production of PCB boards. PCB is firstly printed / sprayed with ink, exposed and developed, and then the residual ink is removed by lye to form alkaline high-content organic / inorganic wastewater, and then the solid components are separated by centrifugation / press filtration and other processes. Become ink residue. [0003] PCB is irreplaceable in the entire electronic product, and any electronic device or product needs ...

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Problems solved by technology

[0008] A comprehensive analysis of the above several treatment methods shows that although the first treatment method can effectively recycle ink slag and has the advantages of simple and direct treatment, it cannot achieve reduction and harmlessness, and the reuse of ink slag as a raw material currently exists It has disadvantages such as low scale, low market tolerance, and poor sales of finished products, so it does not have universal application; although the second treatment method can achieve a certain reduction and harmlessness, it still needs subsequent disposal. Eliminating the impact of ink slag on the ecological environment cannot completely realize the harmlessness and reduction of ink slag, so it is mostly used in the intermediate treatment stage of ink slag; the third treatment method can realize the complete harmlessness and reduction of ink slag At the same time, based on the high calorific value of ink slag, it can also realize partial energy recovery and utilization during incineration, but it is easy to produce highly toxic substances such as dioxin during incineration, and there is a large investment and high treatment cost. disadvantages, so it will cause greater pressure on the ecological environment and social economy

[0009] It can be seen from the above that the existing ink slag treatment methods either cannot achieve effective treatment of ink slag, or are costly, do not have good practicability and operability, and the comprehensive energy consumption and cracking efficiency are greatly affected

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