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Dedusting method and system for coal moisture control

A technology of dust removal system and coal humidity control, applied in the field of dust removal system, can solve the problems of sticky material blockage of ash discharge system equipment, flammability and explosion of coal humidity control and dust removal, and easy condensation of flue gas, so as to achieve smooth ash discharge and easy removal Explosive and easy to raise dust, the effect of guaranteed system safety

Active Publication Date: 2013-01-02
BAOSHAN IRON & STEEL CO LTD
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Problems solved by technology

[0015] The object of the present invention is to seek a dust removal method and system for coal humidity control, which can effectively solve the problem of flammability and explosion of coal humidity control dust removal, easy condensation of flue gas resulting in poor ash cleaning, and hot coal dust meeting cold water to produce a large amount of water vapor, resulting in exhaust The problem of sticky material clogging in ash system equipment

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  • Dedusting method and system for coal moisture control
  • Dedusting method and system for coal moisture control
  • Dedusting method and system for coal moisture control

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Embodiment Construction

[0047] see figure 2 , image 3 , the dust removal system for coal humidity control of the present invention, it comprises, bag filter 1, its inlet pipeline is connected respectively drier outlet flue 2 and the flue of coke oven 3 and circulation fan 7; At the outlet of the ash bin of the bag filter 1; the ash discharge screw 5 is installed under the rotary ash discharge valve 4, and the ash discharge screw adopts an air-sealed structure; the humidifying mixer 6 is installed at the outlet of the ash discharge screw 5.

[0048] The bag filter 1 adopts heating nitrogen N 2 As the soot cleaning and backflushing medium, nitrogen is heated through the heat exchanger 9 for heat exchange.

[0049] The gas seal of the ash discharge screw 5 adopts nitrogen gas seal, and is connected to the above-mentioned heat exchanger 9 through the pipeline to exchange heat and heat the nitrogen pipeline.

[0050]The flue gas at the outlet of the dryer is mixed with the high-temperature flue gas o...

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Abstract

The invention provides a dedusting method and a system for coal moisture control. The method includes mixing flue gas from drier outlet with high-temperature coke oven flue gas, introducing into a bag dust collector, introducing coal dust from the dust bin of the bag dust collector into an ash discharge screw via a rotary ash unloading valve, humidifying the dried coal dust in a humidifying stirrer, discharging, and recovering. The ash discharge screw has gas seal and packing seal structure. The invention solves the problems of existing coal moisture control process, such as high flammability, explosiveness, dewing of flue gas induced difficulty in ash removal, and blocking of ash discharge system caused by formation of a large amount of water vapor due to contact of hot coal dust with cold water.

Description

technical field [0001] The invention relates to a dust removal system, in particular to a dust removal method and system for coal humidity adjustment. Background technique [0002] The Steam Rotary Coal Moisture Conditioning Process (abbreviated as STD-CMC) is a pretreatment technology for coking coal, that is, through drying the coking coal outside the furnace, it reduces and stabilizes the moisture content of the coking coal. The drum type multi-tube dryer is its main equipment. [0003] The powdered coal material enters from the feed end and is continuously sprinkled with the rotation of the dryer drum. At the same time, the coal dust on the surface of the dried coal particles is desorbed, resulting in a large amount of coal dust, which accounts for about 10% of the dryer's processing capacity. This part of coal dust is mixed with the water vapor produced by the drying and evaporation of coal materials, pushed by the air blown by the air-carrying fan and sucked by the in...

Claims

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Application Information

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IPC IPC(8): B01D46/02B01D46/04F27D17/00C10B57/00C10B57/10
Inventor 刘杰程乐意曹银平张福行姜伟忠马寅元李良华汪磐石
Owner BAOSHAN IRON & STEEL CO LTD
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