Melting treatment method and device for ultra-low volatile carbon-based fuel

Abstract

A melting treatment device for ultra-low volatile carbon-based fuel comprises a preheater, a cyclone melting furnace, slag processing equipment and a waste heat boiler, wherein the ultra-low volatilecarbon-based fuel and an oxidant are fed into the preheater for preheating; the preheated ultra-low volatile carbon-based fuel and oxidant are fed to the cyclone melting furnace for combustion; the slag processing equipment is arranged at the bottom of the cyclone melting furnace and is used for processing slag generated in the cyclone melting furnace; and flue gas generated after combustion of the cyclone melting furnace is introduced to the waste heat boiler so that waste heat in the flue gas can be recycled.

Description

technical field [0001] The invention relates to a high-temperature melting technology, in particular to a melting treatment method and a treatment device of an ultra-low volatile carbon-based fuel. Background technique [0002] Classified utilization is an effective way to deal with low-rank coal. Low-rank coal produces high-value oil and gas through pyrolysis or gasification. The treatment of remaining semi-coke or residual carbon plays a vital role in improving the utilization rate of low-rank coal. The by-products of low-rank coal pyrolysis or gasification, semi-coke and residual carbon, are "ultra-low volatile carbon-based fuels", that is, the volatile content is much lower than that of conventional coal. When traditional technology is used to burn, it will encounter difficulties in ignition and stable combustion, and low burnout rate. [0003] At present, the processing methods of ultra-low volatile carbon-based fuels are mainly co-firing and pure burning. Pure combus...

AI Technical Summary

Problems solved by technology

The existing cyclone melting furnaces are arranged in the furnace head and the swirl combustion fuel is rapidly melted in the radiation area of ​​the swirl burner. However, due to the narrow radiation area of ​​the burner, the fly ash is not completely melted and the slag collection rate is low.

[0005] Ultra-low volatile carbon-based fuels have problems such as difficulty in ignition and stable combustion, low burnout rate, and the fly ash after combustion cannot be disposed of, causing secondary pollution

In the traditional melting process, the fuel is fed by pneumatic delivery, and air or nitrogen is used as the pipeline to transport the gas. The air entering the melting furnace will produce NOx during the high-temperature treatment process, and the combustion treatment will cause environmental pollution, and the gasification process will reduce the gas quality.

The current cyclone melting furnaces are equipped with swirl burners on the top, which has the disadvantages of incomplete melting and low slag collection rate.

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