Raw coal upgrading device and method with combination of drying and dry separation

Abstract

The invention provides a raw coal upgrading device and a method with the combination of drying and dry separation, wherein the raw coal upgrading device comprises a coal supply system, a hot-air system, a drying system, a dedusting and exhaust system, and a dry separation system, wherein the coal supply system respectively supplies raw coal to the hot-air system and the drying system by using a raw coal transport device; the hot-air system is a heat supply source part of the drying system; the drying system is used for drying and dehydrating the raw coal; the dedusting and exhaust system consists of a deduster and an exhaust fan; and the dry separation system comprises a dry separator, a circulating fan and a cyclone separator, and used for separating the dried raw coal into cleaned coal, middle coal and gangue. By using the raw coal upgrading device and the method, not only is the dry coal preparation and drying process organically combined together so as to play the respective advantages of the drying and the dry separation, but also the application range of the device is expanded, the investment is less, and the production cost is low, thus being convenient for the popularization and application of coal upgrading technology.

Description

technical field [0001] The invention relates to the field of material separation, in particular to a dry dry separation combined raw coal quality improvement equipment and method, which is also applicable to the separation and quality improvement of materials other than coal. Background technique [0002] The water content, ash and sulfur content of coal are important factors affecting coal quality. In order to improve the quality of coal, coal must be dehydrated and sorted. With the development of coal upgrading technology, coal drying and dry separation process has been widely used, and has achieved remarkable results. [0003] For example, a kind of coal slime drying equipment is disclosed in Chinese patent CN2494964Y, which is composed of a fluidized bed drying part and a heat source supply part. The fluidized drying part is composed of a coal conveyor, a crusher, a predryer, a screw feeder, Fluidized bed fluidized drying furnace, double-stage cyclone separator, belt c...

AI Technical Summary

Problems solved by technology

[0007] Therefore, from the perspective of equipment and economy, the use of drying and dry separation equipment respectively makes it difficult to promote dry coal preparation due to the quality of raw coal, and it is difficult for investors to accept due to the large investment.

Moreover, subject to the current technical level, there is no good way to solve the above problems at home and abroad

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