Baking device for electricity generating coal or power coal

Abstract

The invention relates to a baking device for electricity generating coal or power coal. The baking device comprises a revolving cylinder body (1), and is characterized in that a plurality of material spreading devices for spreading materials are arranged on an inner wall of the revolving cylinder body (1). Therefore, the baking device disclosed by the invention has the advantages that 1, the baking device is reasonable in design, simple in structure and completely practical; 2, the phenomenon that hot air flow is short-circuited, and the hot air flow flows out of the baking device from a middle part is avoided, so that heat loss can be avoided, and the baking quality of brown coal is improved.

Description

technical field [0001] The invention relates to a drying machine, in particular to a drying device for electric coal or thermal coal. Background technique [0002] Lignite is the youngest coal to form among the earth's fossil solid fuels. It is characterized by a very high volatile content, which determines that the explosiveness and flammability of this kind of coal are very strong during baking. The water content in coal is also very high, generally as high as about 40%, especially the internal water content of coal is not easy to remove, which also determines the calorific value of lignite is very low. The fixed carbon content is also very low, the ash content is moderate, the tar content is high, and the sulfur content can be high or low according to the lignite origin. This will lead to the lignite desulfurization system must be considered in accordance with the national environmental protection policy during the lignite baking process. [0003] The large coal mine...

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Problems solved by technology

[0004] The present invention mainly solves the problem that the lifting plate of the rotary dryer in the prior art is a whole piece of lifting plate. In the lifting material, there are many cavities in the middle part of the rotating cylinder, which is easy to short-circuit the hot air flow, and from the middle out of the machine, thus causing heat loss, reducing the drying quality of lignite and other technical problems; it provides a method to change the lifting plate of the original dry rotary dryer into a stepped whole lifting plate, and make it in the circumference The upper staggered joints are arranged to achieve the largest uniform material curtain that can raise the lignite during the rotation. Especially during the material raising, there is no cavity in the middle part of the rotating cylinder, which prevents the short circuit of the hot air flow and escapes from the middle of the machine. A lignite rotary dryer that does not cause heat loss and improves the quality of lignite drying

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