Self-supplied heat source type of brown coal drying destructive distillation upgrading equipment

Abstract

The invention discloses a self-supplied heat source type of brown coal drying destructive distillation upgrading technology and equipment, and solves problems of low dehydration efficiency and large energy consumption of a prior art. The equipment is characterized by comprising a drying column and a destructive distillation tower; the drying column and the destructive distillation tower are both provided with heat exchange breather pipes; the tower body is provided with a combustion chamber for providing heat source and a heat cycling pipeline connected with a smoke extractor exhaust fan; a draining steam pipe port is arranged on an upper part of the tower; a scattering-type burden distribution vibrating screens are arranged on the tops of the towers; discharge holes are arranged on tower bottom bracing frames; a gas suction pipe port is arranged in the middle of a vertical destructive distillation tower; the destructive distillation tower is connected with a gas collection tower through the gas pipe; and collected gas is sent to the air supply pipes of drying column and the destructive distillation tower as heat source through machinery dedusting and electric dedusting. Water content of brown coal dried by the drying column can be reduced to within 13%; after destructive distillation, the brown coal reaches quality of a coke finished product, so as to realize self supply of heat source.

Description

1. Technical field [0001] The invention belongs to the field of material quality improvement, and in particular relates to a self-heating source type lignite drying and carbonization upgrading process and equipment capable of improving material quality. 2. Background technology [0002] Lignite is a kind of coal with a low degree of deterioration and high volatile content and internal moisture. At the same time, lignite also has the characteristics of being easily weathered when exposed to air and easily muddied when exposed to water. Domestic general thermal coal washing plants, most of the lignite washing plants are supporting services for open-pit coal mines, and the raw coal of the coal preparation plants is directly transported from the open-pit mining belt conveyor or large mine trucks to the coal receiving system of the coal preparation plant. The equipment used in domestic lignite processing is the same as that used in general coal preparation plants. Large-scale equ...

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Problems solved by technology

[0003] At present, as an effective and practical technology for coal gangue discharge and sulfur reduction, the compound dry coal preparation can not only save water resources, but also avoid secondary pollution of coal slime water. Although the process is simple, the investment is small, and the production cost is low, its unique Its characteristics are suitable for the needs of my country's coal enterprises and have been popularized and applied at the speed of sound. It provides an economical and practical coal preparation method for coal processing. The block is naturally dry and easy to crack and break, the coal block is broken to less than 25mm, and the angle of repose is 46 0 , Bulk density 0.72), the dry coal preparation technology cannot be directly selected, so a dry distillation equipment to improve the quality of lignite is urgently needed to meet the needs of the majority of coal mine production enterprises

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