A kind of briquette for vertical industrial kiln and its preparation method

Abstract

The invention discloses briquette coal for a vertical industrial kiln and a preparation method thereof, and belongs to the technical field of solid fuel. The briquette coal is characterized by comprising the following raw materials by mass percent: 80-85% of anthracite, 8-10% of adhesive, 1-2% of sulphur-fixing agent and 4-8% of biomass, wherein the calorific value of the anthracite is greater than or equal to 6100 kilocalorie / ton, the ash content is smaller than or equal to 6%, and sulphur is smaller than or equal to 0.4%. The adhesive comprises the following raw materials by mass percent: 18-22% of plant cellulose, 18-22% of cement, 35-47% of starch, 7.5-12% of humic acid and 7.5-12% of high-molecular polymer. According to the briquette coal, coal can be saved by 10-27%, the soot emission is reduced by 50-60%, the emission of sulfur dioxide can be reduced by 35-50%. The adopted adhesive is high in strength, and large in calorific value, and is not broken in the kiln, and the distribution uniformity is improved, the combustion temperature is even, the sintering quality of the product is improved, and the adhesive is nontoxic and tasteless.

Description

Technical field [0001] The invention belongs to the technical field of solid fuels, and specifically relates to a briquette for vertical industrial kilns and a preparation method thereof. Background technique [0002] At present, most vertical industrial kilns use anthracite lump coal as fuel. Although anthracite lump coal meets the heating value requirements of vertical industrial kilns, there are also some problems in the combustion process. Among them, the following three are more prominent. point: [0003] 1. Some lump coal cannot be fully burned, causing fuel waste; [0004] 2. The smoke and dust emission is large, which does not meet the requirements of environmental protection; [0005] 3. The calcination is uneven, causing the product to have over- or under-burning problems, which affects the product quality. [0006] In recent years, a kind of coal briquette technology has emerged, trying to replace lump coal with the briquette produced by it in order to overcome the defects ...

AI Technical Summary

Problems solved by technology

[0003] 1. Some lump coal cannot be fully burned, resulting in waste of fuel;

[0004] 2. The emission of smoke and dust is large, which does not meet the requirements of environmental protection;

[0005] 3. Calcination is uneven, resulting in over-burning or under-burning of the product, which affects product quality

[0007] Chinese patent 200510022765.6 discloses a biomass briquette formula using power coal blending technology, which is formulated with bituminous coal, anthracite, calcium-based sulfur fixative, straw binder, binder additive bentonite and water, and is ideal for boilers. However, due to its low calorific value and high volatile content, when used in a vertical industrial kiln, it usually burns out before the firing zone of the kiln, resulting in a low temperature in the firing zone, which affects the product The firing quality is not suitable for vertical industrial kilns, especially lime kilns

[0008] Most of the existing briquettes have the above-mentioned problems, resulting in vertical industrial kilns, especially lime kilns, still staying at the stage of using anthracite lump coal as fuel

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