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Coking coal pretreatment method and special device thereof

A special equipment and coking coal technology, which is applied in the field of coking coal pretreatment, can solve the problems affecting coke production, quality, coke oven operation and service life, and achieve the reduction of coke oven residual ammonia water and wastewater treatment volume, obvious economic benefits and Social benefit, effect of coke strength improvement

Inactive Publication Date: 2013-03-06
袁长胜
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Problems solved by technology

[0003] Usually, the moisture content of the raw coal entering the factory is about 10%, and the moisture content of the furnace coal is too high, which will affect the coke output, quality, coke oven operation and life

Method used

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  • Coking coal pretreatment method and special device thereof
  • Coking coal pretreatment method and special device thereof

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Embodiment Construction

[0018] The present invention will be further explained below in conjunction with the accompanying drawings.

[0019] Such as figure 1 Shown is a schematic process flow diagram of the coking coal pretreatment method of the present invention. The coking coal is transported to the humidity-adjusting and classifying bed by the belt conveyor, and the coal material is on the humidity-adjusting and classifying bed, blown by coke oven flue gas or other waste heat gas at 180°C to 220°C under the bed, and the solid coal is in a fluid state It realizes the classification and separation of coking coal and moisture control (coal humidity control) treatment. Due to the different particle size and quality of the coal, on the bed, the small particle coal of ≤3mm is blown up by the hot air, and falls into the fine particle coal collection hopper at the lower part of both sides of the bed, and is transported by the screw conveyor and the belt conveyor. To the coal tower; the large particle co...

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Abstract

The invention discloses a coking coal pretreatment method and a special device thereof. The coking coal pretreatment method comprises the following steps: transferring blending coal for coking into ahumidifying and classifying bed through a feeding device; blowing the blending coal for coking into a fluidization state with waste and heat gas; regulating and controlling moisture; fractionating theblending coal by grain sizes; reducing the moisture content of the bending coal to 6-8 percent with heat gas in the humidifying and classifying bed; dividing the coal into two grain size levels, wherein one grain size level is less than or equal to 3mm, and the other grain size level is greater than 3mm; discharging fine grain coal with a grain size which is less than or equal to 3mm from the humidifying and classifying bed, and transporting the fine grain coal to a pulverizer chamber for pulverization; and transporting the pulverized fine grain coal into a coal tower. The special device comprises the humidifying and classifying bed, a coke oven chimney, the pulverizer, the coal tower and a tail gas treating device. The coking coal pretreatment method can increase the output of a coke oven, improves the quality of the coking coal, reduces the energy consumption of the coke oven and the exhaust of waste gas and waste liquid, is applied to a coal pretreatment technology in a coking industry and can realize the purposes of energy saving, emission reduction and circular economy development.

Description

technical field [0001] The invention relates to a coking coal pretreatment method in a coal preparation system of a coking plant, in particular to a coking coal pretreatment method and special equipment thereof. Background technique [0002] At present, in the coal preparation system, the pretreatment technology of particle size fractionation and moderate moisture control for coking coal is one of the four frontier technologies involved in the coking industry. Moderate moisture control of coking coal, commonly referred to as "coal humidity control", is evolved from coal drying and coal preheating. Coal humidity control has strict moisture control measures to remove part of the moisture from coking coal materials before loading into the furnace to ensure Coking furnace coal moisture content reached a reasonable value and stabilized within this range. [0003] Usually, the moisture content of the raw coal entering the factory is about 10%, and the moisture content of the furn...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B07B7/01C10B57/10B02C23/00C10B57/00
Inventor 袁长胜崔平李长桃
Owner 袁长胜
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