Plasma gasifying melting device for treating three-way catalyst

Abstract

The invention discloses a plasma gasifying melting device for treating a three-way catalyst. The device comprises a plasma gasifying melting furnace and a second combustion chamber which are integrally formed, the second combustion chamber is arranged above the plasma gasifying melting furnace, the diameter of a furnace cavity in the connecting position of the secondary combustion chamber and theplasma gasifying melting furnace is smaller than the diameter of a furnace cavity of the plasma gasifying melting furnace, a smoke blocking wall structure is arranged at the connecting position of thesecondary combustion chamber and the plasma gasifying melting furnace, and the diameter of a furnace cavity of the secondary combustion chamber is gradually increased in the vertical direction upwards. The heavy metal in the three-way catalyst can be more effectively recycled, harmless and resource treatment of the three-way catalyst can be more thoroughly achieved, a new furnace type is achieved, on the premise of ensuring treatment effect, treatment efficiency is improved, and the treatment amount needs are met.

Description

technical field [0001] The invention relates to the technical field of industrial waste treatment, in particular to a plasma gasification and melting device for treating three-way catalysts. Background technique [0002] The carrier part of the three-way catalyst is a porous ceramic material, the main component of which is aluminum oxide, covered with a layer of platinum, rhodium, palladium and other precious metals. It does not participate in the catalytic reaction itself, but enhances the activity of the three gases CO, HC and NOx, and promotes a certain oxidation-reduction chemical reaction, in which CO is oxidized at high temperature to become colorless and non-toxic carbon dioxide gas; HC compound Oxidized to water (H20) and carbon dioxide at high temperature; NOx reduced to nitrogen and oxygen. Three kinds of harmful gases become harmless gases, so that the automobile exhaust can be purified. [0003] Due to the large difference in the composition of catalyst raw mat...

AI Technical Summary

Problems solved by technology

Among them, the methods of recovering heavy metals can be divided into two categories: wet process and pyrotechnics. The wet process has problems such as low recovery rate of platinum group metals and a large amount of waste water; the pyrotechnic process has problems such as high investment and operating costs.

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