Treatment device and method for microwave upgrading injection coal

Abstract

The invention aims to provide a treatment device and method for microwave upgrading injection coal, and belongs to the technical field of metal smelting industry and coal industry, the device comprises a coal conveying device, an upgrading device, a fluidizing gas storage tank, a cyclone separator, a coal quality on-line detector, an upgrading coal bunker and a control system, the coal conveying device comprises a raw coal bin, a combustion improver bin and a screw feeder; the upgrading device comprises a fluidized gas buffer area, a gas distributor, an upgrading reaction area, a microwave generator, a waveguide, a microwave absorption rod, a thermocouple and a microwave shielding layer; the pulverized coal and the combustion improver in the upgrading area are in a fluidized state under the action of the fluidizing gas and can uniformly absorb microwaves for modification, so that the combustion efficiency of the injection coal is improved, the ignition point of the injection coal and the coke ratio of the blast furnace are reduced, and the production cost is reduced. The system has the advantages of high intelligent automation, good pulverized coal upgrading uniformity, high efficiency and the like, and is suitable for being applied to the metal smelting industry.

Description

technical field [0001] The invention belongs to the technical fields of the metal smelting industry and the coal industry, and particularly relates to a processing device and method for microwave-enhanced coal injection. Background technique [0002] After the rapid expansion of my country's steel industry, the supply of domestic coking coal resources and metallurgical coke is becoming a bottleneck factor. The blast furnace pulverized coal injection (PCI) method can be used to replace part of the coke and effectively reduce the coke ratio, and is a widely used blast furnace technology. Although blast furnace pulverized coal injection can effectively reduce the coke ratio, the gradual increase in the amount of injected pulverized coal leads to another problem: the amount of unburned pulverized coal also increases. Unburned pulverized coal will not only affect the further reduction of coke ratio, but also affect the smooth operation of blast furnaces. Therefore, most iron and...

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Problems solved by technology

[0004] Patent CN103305247A relates to an air-heated pulverized coal reformer and a method for using the reformer to prepare modified coal. However, the device is heated by hot air, and the heat is always The material is heated from the surface to the inside, and there is inevitably a temperature gradient in the material, so the heated material is not uniform, resulting in local overheating of the material

[0005] Patent CN112981020A proposes a device and method for modifying blast furnace pulverized coal injection by microwave external field radiation. Although the quality of pulverized coal must be improved, the thermoelectric The couple is installed on the outer wall of the ceramic tube, which cannot accurately measure the real temperature of the pulverized coal in the tube; and the pulverized coal is completely accumulated at the bottom of the ceramic tube during the microwave process, and there is a problem of uneven heating of the material

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