Coal ash ultrafine powder grinding system realizing multi-stage circular processing and pre-scattering

Abstract

The invention relates to a coal ash ultrafine powder grinding system realizing multi-stage circular processing and pre-scattering, comprising a feeding device; a first adjusting valve; a second adjusting valve; a third adjusting valve; a fourth adjusting valve; a pre-scattering device which is connected with the feeding device; a V-shaped coal pulverizer which is provided with a feeding hole, a coarse material discharge hole, a fine material outlet and an air inlet, wherein the feeding hole is connected with the pre-scattering device, and the air inlet is connected with air cold air blast by the first adjusting valve; a vertical roller mill, which is provided with a roller mill feeding hole, a dust removal hole and a roller mill discharge hole, wherein the roller mill feeding hole is connected with the coarse material discharge hole in the V-shaped coal pulverizer, the roller mill discharge hole is connected with the feeding device or the pre-scattering device, and the dust removal hole is connected with the air inlet in the V-shaped coal pulverizer; a first air locking valve; a second air locking valve; and a third air locking valve. According to the invention, powder material issubjected to circular processing by a four-stage circular processing process, so that the powder material is ground to be finer, and material waste is reduced.

Description

technical field [0001] The invention relates to a fly ash production system, in particular to a multi-stage circulation processing and pre-dispersed fly ash superfine grinding system. Background technique [0002] At present, my country's annual discharge of fly ash is nearly 600 million tons. Although the overall comprehensive utilization rate has reached 70%, in the western and northern coal power concentrated areas, the discharge of fly ash is large and the utilization rate is very low. Most of them are stored in open air or landfilled, which not only pollutes the environment but also wastes resources. [0003] my country's first environmental protection tax law has been officially implemented on January 1, 2018. Enterprises, institutions and other production operators who store or dispose of solid waste such as fly ash that do not meet national and local environmental protection standards need to pay environmental protection tax25 yuan / tonne. Fly ash desulfurization g...

AI Technical Summary

Problems solved by technology

Most of the raw fly ash is stored in the open air, which contains a lot of water. Due to the limitation of the structure of the lifting plate inside the dryer, the raw fly ash is not well dispersed, which leads to poor drying effect and low output; Fly ash is light in weight and has many powders. The grinding effect of the ball mill is not good, the output is low, the power consumption is high, and the noise is large.

The traditional fly ash production line has low output, high power consumption, waste of resources, large floor space and high equipment investment

Does not meet the new normal requirements of energy saving and consumption reduction

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