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Device and method for treating light waste printed circuit boards

A printed circuit board and waste technology, which is applied in the field of devices for processing light-weight waste printed circuit boards, can solve the problems of burning bag production, unstable flue gas, incomplete combustion, etc., achieve stable production process, prolong residence time, full burn effect

Active Publication Date: 2017-03-15
LANZHOU ENG & RES INST OF NONFERROUS METALLURGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The object of the present invention is to provide a device for processing light-weight waste printed circuit boards, so as to solve the problem of incomplete combustion of light-weight circuit board scraps in the furnace during the fire treatment of waste printed circuit boards. Problems such as unstable production and substandard smoke caused by damaged cloth bags

Method used

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  • Device and method for treating light waste printed circuit boards
  • Device and method for treating light waste printed circuit boards

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] The raw material used is a light waste printed circuit board, which is a paper substrate with a particle size of less than 20mm, containing 1.36% copper, of which volatile matter accounts for 40.17%, ash content accounts for 52.14%, and fixed carbon accounts for 7.69%.

[0040] The incinerator used is a top-blown molten pool melting furnace with an inner diameter of 1.5m and a furnace height of 7.0m. The screw feeder is installed at the lower part of the furnace body of the top-blown molten pool melting furnace at a distance of 900mm from the bottom of the furnace, and the discharge end extends into the inner wall of the furnace by 150mm. The ash return pipe used is made of 310s stainless steel.

[0041] The specific processing implementation steps are as follows:

[0042] (1) After opening the water inlet and outlet valves of the screw feeder 3, start to heat up the incinerator, and when the temperature in the incinerator is 100°C, open the cyclone dust collector 6 and ...

Embodiment 2

[0050] The raw material used is a light-weight waste printed circuit board, which is a glass fiber substrate with a particle size of less than 10mm, containing 5% copper, of which volatile matter accounts for 45.42%, and ash content accounts for 54.58%.

[0051] The incinerator used is a top-blown molten pool melting furnace with an inner diameter of 1.0m and a furnace height of 6.0m. The screw feeder is installed at the lower part of the furnace body of the top-blown molten pool melting furnace at a distance of 600mm from the bottom of the furnace, and the discharge end extends into the inner wall of the furnace by 200mm.

[0052] The feeder used is a belt feeder; the ash return pipe used is made of 309s stainless steel.

[0053] The specific implementation steps are as follows:

[0054] (1) After opening the water inlet and outlet valves of the screw feeder 3, start to heat up the incinerator, and when the temperature in the incinerator is 150°C, turn on the cyclone dust co...

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Abstract

The invention belongs to the field of solid waste treatment and discloses a device and method for treating light waste printed circuit boards in order to solve the problems that in the waste printed circuit board incineration process, production is unstable and smoke is not up to standard due to the fact that crushed light circuit boards are not fully burnt in a furnace and float into and burn a cloth bag dust collection device. The device comprises an incinerator, a flue and a cyclone dust collector. The top of the incinerator is connected with the cyclone dust collector through the flue. The device further comprises a discharge chute and a spiral feed machine. The spiral feed machine is arranged under the discharge chute. One end of the spiral feed machine stretches into the incinerator and is located above the slag line area of an incinerator body. According to the device and method for treating the light waste printed circuit boards, the feed mode of materials is modified, the collected unburnt circuit boards are put back into the incinerator for secondary combustion, full combustion of the light waste printed circuit boards is achieved, the problems that the environment is polluted and production is unstable due to incomplete combustion are solved, and meanwhile, the dust content in the smoke is decreased.

Description

technical field [0001] The invention belongs to the field of solid waste treatment, and in particular relates to a device and method for treating light-weight waste printed circuit boards. Background technique [0002] With the rapid development of the electronics industry, the frequency of replacement of various electronic and electrical products is accelerating year by year, and the resulting waste of electronic waste is also increasing. Waste printed circuit boards are an important part of electronic components, and their sources are complex and their components are also different. According to the different substrate materials, waste printed circuit boards can be divided into two categories: glass fiber substrates and paper substrates. The glass fiber substrate has high density and heavy weight, while the paper substrate has low density and light weight. Waste printed circuit boards contain valuable metals such as copper, tin, and gold, which have high recycling value....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23G7/00
CPCF23G7/003F23G2205/121F23G2205/122
Inventor 郭键柄陈正张琪
Owner LANZHOU ENG & RES INST OF NONFERROUS METALLURGY
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