Large-diameter silo uniform discharging and coal blending device and method

Abstract

The invention relates to a large-diameter silo uniform discharging and coal blending device. The device comprises a plurality of silos arranged in parallel, a first coal blending belt is arranged on one sides of the silos, two rows of parallel discharging positions are arranged at the bottom of each silo, each row is provided with at least three discharging ports, and a first belt and a second belt are arranged in the longitudinal direction of each silo; and the first belts and the second belts are located at the bottoms of the discharging ports so that coal in the silos can fall onto the first coal blending belt at the respective belt transfer positions through the first belts and the second belts to be evenly blended. According to the device, the material level of coal in the silos is relatively balanced and stable, and the granularity and moisture segregation of the coal in the silos are prevented, so that the granularity and moisture uniformity of discharged coal are ensured to thegreatest extent, the coal blending precision can be improved, the crushing fineness of blended coal is uniform, and the coke quality fluctuation phenomenon caused by uneven fineness and moisture of coal as fired is prevented; and meanwhile, when the multiple rows of silos are arranged in parallel, uniform matching of coal stored in all silos in each row is achieved.

Description

technical field [0001] The invention belongs to the technical field of coal blending, and in particular relates to a large-diameter silo uniform feeding and coal blending device and method. Background technique [0002] At present, compared with the traditional open-air rectangular coal yard, silos have many advantages such as storage coordination, environmental protection, and reduced land occupation. Large-diameter silos are widely used in the coking industry. In the existing technical scheme, the coal blending belt of the large-diameter silo is located below the silo, and there are two coal blending belts corresponding to the two rows of feeding ports of the silo. The two belts run alternately for coal blending operation, which will cause the coal blending operation in the silo The unbalanced drop of the material level will cause the particle size and moisture segregation of the coal material in the bin, which will affect the coal blending accuracy and the blending coal c...

AI Technical Summary

Problems solved by technology

In the existing technical scheme, the coal blending belt of the large-diameter silo is located below the silo, and there are two coal blending belts corresponding to the two rows of feeding ports of the silo. The two belts run alternately for coal blending operation, which will cause the coal blending operation in the silo The unbalanced drop of the material level will cause the particle size and moisture segregation of the coal material in the warehouse, which will affect the coal blending accuracy and the blending coal grinding fineness and moisture uniformity, and finally lead to the fluctuation of coke quality

In addition, when the coking scale is not large, there is only one coal blending unit, and the number of large-diameter silos is relatively small, arranged in a single row in a straight line, so that the coal in each silo can fall to the directly lower part of the silo Uniform coal blending is realized on the same belt; when the coking scale is large, there are two or more coal blending units, and there are many large-diameter silos, and the silos need to be arranged in a matrix of two or more rows. The silos form a coal blending unit. Although the uniform coordination of each coal blending unit can be achieved, the coal storage capacity of each coal blending unit is still only the sum of the effective storage capacity of this row of silos, not the effective storage capacity of all silos. The sum of the quantity, when there are many types of incoming coal, it is difficult to store them in a single row, or increase the number of silos in a single row, so that the investment will be greatly increased. If two or more rows of silos form a coal blending unit, each The uniform coordination of a coal blending unit has become a problem again

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