Method and device for recycling waste circuit boards through ion liquid

A technology for waste circuit boards and ionic liquids, applied in chemical instruments and methods, solid waste removal, transportation and packaging, etc., can solve problems such as difficulty in gas volume control, difficulty in implementation, difficulty in regeneration, etc. The effect of subsequent production and resource saving

Inactive Publication Date: 2019-07-05
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the one hand, this method consumes a lot of energy, requires an additional gasification agent, and it is difficult to regenerate after the reaction of halogen and molten salt. On the other hand, it is difficult to control the inert reaction environment and the gas volume control, making it difficult to implement.

Method used

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  • Method and device for recycling waste circuit boards through ion liquid
  • Method and device for recycling waste circuit boards through ion liquid
  • Method and device for recycling waste circuit boards through ion liquid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Embodiment 1: the processing object of this embodiment is the TV printed circuit board 100kg disassembled by a waste electric appliance recycling station, and the specific contents are as follows:

[0031] 1. If figure 1 As shown, the device of this embodiment includes a pyrolysis reactor 1, a solid-liquid separation device, a condenser 18, a condensable gas collection device 19, and a non-condensable gas collection device 20. The top of the pyrolysis reactor 1 is provided with a feed port 2, Gas outlet 21, the impeller stirrer 3 is arranged in the pyrolysis reactor 1, two inert electrodes 5 are arranged in the pyrolysis reactor 1, and are positioned at one side of the impeller stirrer, the electromagnetic generator 4 is arranged on the pyrolysis reactor 1, The magnetic field generated by the magnetic field generator covers the pyrolysis reaction space. A heater is arranged in the pyrolysis reactor 1. There is an outlet I6 at the bottom of the pyrolysis reactor 1. The ...

Embodiment 2

[0036] Embodiment 2: The processing object of this embodiment is 80 kg of printed circuit boards such as calculators and old-fashioned landlines disassembled by a certain waste electrical appliance recycling station. The specific contents are as follows:

[0037] 1. The structure of the device used in this embodiment is the same as in Embodiment 1;

[0038] 2. The specific operation and control process are as follows:

[0039] 80kg waste circuit boards are crushed with a universal crusher, crushed to a particle size of 2 mesh, and 180kg [Bmim]CoCl 4 The ionic liquid is mixed, and enters the pyrolysis reactor 1 from the feed port 2, and the impeller stirrer 3 is turned on, and the stirring rate is 60r / min; 10°C / min, when the temperature reaches 120°C, the electromagnetic generator 4 is turned on to generate a constant magnetic field of 1T, the inert electrode 5 is energized, and the voltage is constant at 10V, the condensing device 18 is turned on, and gas collection starts, w...

Embodiment 3

[0043] Embodiment 3: the processing object of this embodiment is 20kg of electronic calculator printed circuit boards disassembled by a waste electric appliance recycling station, and the specific contents are as follows:

[0044] 1. The structure of the device used in this embodiment is the same as in Embodiment 1, except that there is no magnetic field generator;

[0045] 2. The specific operation and control process are as follows:

[0046] Use a universal crusher to crush 20kg of waste circuit boards until the particle size is 50 mesh, and 100kg [Bmim]Fe 2 Cl 7 The ionic liquid is mixed, and enters the pyrolysis reactor 1 from the feed port 2, and the impeller stirrer 3 is turned on, and the stirring rate is 60r / min; 10°C / min, when the temperature reaches 120°C, the inert electrode 5 is energized, and the voltage is constant at 110V, the condensing device 18 is turned on, and gas collection starts, and when the temperature rises to 200°C, it enters the constant temperatu...

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Abstract

The invention discloses a method and a device for recycling waste circuit boards through ion liquid, and belongs to the technical field of solid waste resource development and utilization. The methodcomprises the steps of prilling the waste circuit boards, then mixing the waste circuit board particles and the magnetic ion liquid, heating the mixture, meanwhile, applying voltage on the mixture through an inert electrode or/and applying a magnetic field on the mixture through a magnetic induction loop, carrying out catalytic pyrolysis on the mixture at 200 to 500 DEG C, collecting a gas-phase product, and condensation recycling; and separating solid-phase and liquid-phase products, recycling a liquid phase, and magnetically separating a solid phase. According to the method and the device for recycling the waste circuit boards through the ion liquid provided by the invention, the ion liquid with a high catalytic performance is utilized, electricity or/and magnetism is/are additionally added for producing an electromagnetic coupling liquid phase catalysis effect on an organic matter base plate, the pyrolysis temperature is low, the micromolecule substance yield is high, a catalyst canbe recycled, and a pyrolysis three-phase product is high-value utilized.

Description

technical field [0001] The invention discloses a method and a device for ionic liquid catalytic pyrolysis resource utilization of waste circuit boards, belonging to the technical field of solid waste resource utilization. Background technique [0002] The circuit board is the foundation of the electronics industry. At present, the electronic waste in my country is growing at a rate of no less than 18% per year. Because the circuit board is the most widely used electronic component, it is the main component especially in computers and communication equipment. , Therefore, waste circuit boards have become one of the main electronic wastes. [0003] The existing incineration method to process circuit boards needs to be incinerated in a high-temperature aerobic environment, which is very easy to cause secondary pollution. The chemical method mainly uses chemical leaching, and the demand for external additives is relatively large. The pyrolysis method is to conduct heating distil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09B3/00B09B5/00
CPCB09B5/00B09B3/40Y02W30/82
Inventor 瞿广飞李伟杰何艳华宁平梁率钰
Owner KUNMING UNIV OF SCI & TECH
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