Fixed bed reactor used for low-temperature continuous pyrolysis treatment of waste circuit boards, and method thereof

Abstract

The invention relates to a fixed bed reactor used for low-temperature continuous pyrolysis treatment of waste circuit boards, and a method thereof. The reactor comprises a feeding opening, a reaction chamber, a discharging opening, an electrostatic separator, a solid carbon collecting bin and a metal collecting bin, the feeding opening is arranged above the discharging opening, the reaction chamber comprises a feeding screw, a discharging screw and a material plate, the material plate comprises a feeding end and a discharging end, the feeding screw is positioned under the feeding opening and at the upper portion of the feeding end, the discharging screw is positioned at the upper portion of the discharging end, the discharging end is arranged above the discharging opening, the feeding screw comprises a center screw rod, a left screw blade and a right screw blade, the center screw transversely traverses through the left screw blade and the right screw blade, the left screw blade and the right screw blade are vertical to the center line of the center screw and are axially symmetric, a distance between the left screw blade and the right screw blade is 1/3-1/2 of the caliber of the feeding opening; and the solid residue inlet of the electrostatic separator is connected with the discharging opening, the solid carbon outlet of the electrostatic separator is connected with the solid carbon collecting bin, and the metal outlet of the electrostatic separator is connected with the metal collecting bin. The reactor and the method have the advantages of realization of continuous treatment of the waste circuit boards, simplicity in operation, and high economic benefits.

Description

technical field [0001] The invention relates to the field of waste circuit board treatment, in particular to a low-temperature continuous pyrolysis fixed-bed reactor for waste circuit board treatment and a method for using the reactor to process waste circuit boards. Background technique [0002] Pyrolysis, also known as dry distillation in industry, is a thermochemical process in which organic matter is heated and decomposed into gas, liquid and solid under the condition of no oxygen or oxygen deficiency. Since the pyrolysis process is carried out under anaerobic or hypoxic conditions, the formation of dioxins and furans can be suppressed. In addition, the coke produced during pyrolysis is reducing and can inhibit the formation of metal oxides and halides. Compared with combustion technology, the toxic and harmful substances emitted into the atmosphere during the pyrolysis reaction process are much lower. [0003] At present, there are two main pyrolysis processes for was...

AI Technical Summary

Problems solved by technology

Therefore, this method cannot realize continuous feeding and discharging of materials under the condition of hot state, has no automatic material distribution and discharging functions, and does not realize high-temperature pyrolysis of non-condensable gas to provide heat by itself.

The process of feeding and discharging materials needs to heat up and cool down the reactor, which reduces the processing capacity and efficiency of the device and increases the failure rate

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