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Waste circuit board fixed bed pyrolyzing system heated through high-temperature gas seepage

A technology of waste circuit boards and high-temperature gas, which is applied to the removal of solid waste, thermometers, and heat measurement. It can solve the problems of corrosion pyrolysis heating temperature, affecting heat transfer, and large thermal resistance, and achieves high recovery rate and recovery purity. , Improve pyrolysis efficiency and reduce pollution

Pending Publication Date: 2017-07-14
TIANJIN UNIV
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

The wall conduction heats the pyrolyzed material by means of wall heat conduction, but the wall conduction heating method has a large thermal resistance, and the pyrolysis residue covers the heat transfer wall surface, which is prone to affect heat transfer, corrosion, and certain pyrolysis heating temperature. Restrictions and other issues

Method used

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  • Waste circuit board fixed bed pyrolyzing system heated through high-temperature gas seepage
  • Waste circuit board fixed bed pyrolyzing system heated through high-temperature gas seepage
  • Waste circuit board fixed bed pyrolyzing system heated through high-temperature gas seepage

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Embodiment Construction

[0012] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0013] Such as figure 1 A fixed-bed pyrolysis system for waste circuit boards heated by high-temperature gas percolation shown in the present invention includes a pyrolysis furnace 6, and the pyrolysis furnace 6 includes a furnace body, and the furnace body is supported by heat insulating bricks 22 Above, a furnace cover is fixed on the top of the furnace body, and the furnace body includes a pyrolysis furnace hearth 11 surrounded by an inner tank, and the outer wall of the inner tank is covered with a thermal insulation structure 12 and a pyrolysis furnace in turn. The outer wall 13 of the furnace is provided with a soot cleaning port 14 at the bottom of the furnace body to clean up the dust falling from the orifice plate of the pyrolysis furnace. A porous orifice plate 21 is installed along the horizontal direction at the bottom of the pyr...

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Abstract

The invention discloses a waste circuit board fixed bed pyrolyzing system heated through high-temperature gas seepage. A porous plate is mounted at the bottom of a hearth of the pyrolyzing furnace in the horizontal direction. A control box side thermocouple and an auxiliary heater are arranged in the interior, on the lower portion of the porous plate, of the hearth of the pyrolyzing furnace. A plurality of mounting holes leading to the hearth of the pyrolyzing furnace are formed in the position, on the upper portion of the porous plate, of a furnace body. A pyrolyzing furnace thermocouple is mounted in each mounting hole. A pyrolysis gas outlet pipe communicating with the hearth of the pyrolysis furnace is arranged on a furnace cover. An outlet of the pyrolysis gas outlet pipe is connected with a pyrolysis gas condensation collecting system. The bottom of the hearth of the pyrolysis furnace communicates with a pipeline and a self-pressurization nitrogen tank in the heater in sequence through a high-temperature nitrogen inlet pipe. By adopting the device, pyrolysis efficiency can be improved, and pollution to the environment is reduced.

Description

technical field [0001] The invention relates to a fixed-bed pyrolysis system, in particular to a fixed-bed pyrolysis system for waste circuit boards heated by high-temperature gas percolation. Background technique [0002] With the production of a huge number of WPCBs, in addition to the valuable metals such as gold, silver, copper and non-metallic materials such as glass fibers that have recyclable value, they contain toxic and harmful components such as lead, chromium, and brominated flame retardants. The pressure on the environment has also received more and more attention. Recycling and harmless recycling of it is an urgent need for the development of contemporary electronic products, and it is also the practical significance of realizing the harmonious and sustainable development of people and the environment. where. [0003] In recent years, the research on the treatment and recycling of waste printed circuit boards has also attracted more and more attention from the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09B3/00G01K7/02
CPCG01K7/02B09B3/40Y02W30/82
Inventor 马洪亭杜娜李聪于少洁张泽宇
Owner TIANJIN UNIV
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