Eddy current self-heating nitrogen replacement and detoxification device for dioxin-containing fly ash

Abstract

The invention discloses an eddy current self-heating nitrogen replacement and detoxification device for dioxin-containing fly ash. The eddy current self-heating nitrogen replacement and detoxification device is characterized by comprising a kiln body, wherein the kiln body is of a hollow structure and is of a three-section structure comprising a preheating section, a heating section and a cooling section; an inductance heating device wraps the heating section; at least one nitrogen channel is arranged in the kiln body in a penetrating manner; the conveying direction of the nitrogen channel is the cooling section, the heating section and the preheating section; waste gas is discharged through an exhaust port of the preheating section; a plurality of exhaust holes are formed in the part, passing through the heating section, of the nitrogen channel; and nitrogen is discharged through the exhaust holes and then reacts with the dioxin-containing fly ash. According to the eddy current self-heating nitrogen replacement and detoxification device, the energy-saving effect is improved through the sectional structure and the counter-current design, and the fly ash is subjected to a scouring reaction through the nitrogen channel, so that the reaction completeness is improved.

Description

technical field [0001] The invention relates to the field of dioxin-containing hazardous waste treatment, in particular to a vortex self-heating type dioxin-containing dust removal ash nitrogen replacement and detoxification device. Background technique [0002] At present, the market uses gas flue gas to directly heat materials or uses fire pipe jackets to indirectly heat materials. The flue gas is directly heated, and the flue gas contains oxygen, which reduces the decomposition effect of organic matter in the dust removal ash, and once the combustion temperature is uncontrollable. The fire tube jacket is indirectly heated, and the material is only stirred by the rotating center rake, and it is always accumulated at the bottom of the fire tube jacket, which cannot be fully mixed with the incoming nitrogen, and the heat is not uniform, and the heat transfer efficiency is low. [0003] Fuel combustion has the defects of inflexible temperature control, uneven temperature dis...

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Problems solved by technology

[0004] In order to overcome the problems of high pollution and product instability caused by direct heating of materials with gas flue gas or indirect heating of materials with fire pipe jackets in the prior art, the present invention provides a vortex self-heating type dust removal ash containing dioxin Nitrogen replacement detoxification device

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