An integrated process for coke oven flue gas dry desulfurization, denitrification and purification

A dry desulfurization and flue gas technology, applied in the field of coal chemical industry, can solve the problems of low desulfurization and denitrification efficiency, not too strong practicability, large heat loss, etc., and achieve the effects of less processing costs, prolonging life, and reducing operating costs

Active Publication Date: 2021-07-23
WUHAN KELIN FINE CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This invention first raises the temperature for denitrification and then lowers the temperature for desulfurization. The increase and decrease of temperature will inevitably cause heat loss, and a large amount of flue gas from the gas heating furnace is required, so the practicability is not too strong
[0006] From the above introduction, it can be seen that the coke oven flue gas desulfurization and denitrification currently on the market has the disadvantages of complex process, low desulfurization and denitrification efficiency, large heat loss, and high energy consumption.

Method used

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  • An integrated process for coke oven flue gas dry desulfurization, denitrification and purification

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The coke oven flue gas desulfurization and denitrification integrated purification process in a coking plant in Shanxi is shown in the attached figure 1 As shown, the SOx content in the feed gas is 198mg / m 3 , NOx is 1200mg / m 3 , chlorine content 3.5mg / m 3 , fluorine content 0.3mg / m 3 , gas volume is 20000m 3 / h, the temperature is 260°C, the coke oven flue gas first enters the dechlorination reactor 1, and the dechlorination agent is installed 20m 3 , airspeed is 10000h -1 ,, the chlorine and fluorine in the raw material gas react with the active components of the dechlorination agent, are adsorbed on the dechlorination agent, and most of the chlorine and fluorine are removed. After dechlorination, the chlorine and fluorine content in the raw material is less than 0.1mg / m3. Because the dechlorination agent has a large specific surface area, it can absorb a large amount of smoke and dust at the same time, and the smoke and dust in the raw material can be reduced b...

Embodiment 2

[0036] The coke oven flue gas desulfurization and denitrification integrated purification process in a coking plant in Shanxi is shown in the attached figure 1 As shown, the SOx content in the feed gas is 198mg / m 3 , NOx is 1200mg / m 3 , chlorine content 3.5mg / m 3 , fluorine content 0.3mg / m 3 , gas volume is 20000m 3 / h, the temperature is 300°C, the coke oven flue gas first enters the dechlorination reactor 1, and the dechlorination agent is installed 10m 3 , the airspeed is 20000h -1 ,, the chlorine and fluorine in the raw material gas react with the active components of the dechlorination agent, are adsorbed on the dechlorination agent, and most of the chlorine and fluorine are removed. After dechlorination, the chlorine and fluorine content in the raw material is less than 0.1mg / m 3 . Because the dechlorination agent has a large specific surface area, it can absorb a large amount of smoke and dust at the same time, and the smoke and dust in the raw material can be re...

Embodiment 3

[0042] The coke oven flue gas desulfurization and denitrification integrated purification process in a coking plant in Shanxi is shown in the attached figure 1 As shown, the SOx content in the feed gas is 198mg / m 3 , NOx is 1200mg / m 3 , chlorine content 3.5mg / m 3 , fluorine content 0.3mg / m 3 , gas volume is 20000m 3 / h, the temperature is 280°C, the coke oven flue gas first enters the dechlorination reactor 1, and the dechlorination agent 13.3m 3 , airspeed is 1500h -1 ,, the chlorine and fluorine in the raw material gas react with the active components of the dechlorination agent, are adsorbed on the dechlorination agent, and most of the chlorine and fluorine are removed. After dechlorination, the chlorine and fluorine content in the raw material is less than 0.1mg / m 3 . Because the dechlorination agent has a large specific surface area, it can absorb a large amount of smoke and dust at the same time, and the smoke and dust in the raw material can be reduced by 50% aft...

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PUM

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Abstract

An integrated process for dry desulfurization, denitrification and purification of coke oven flue gas. The coke oven flue gas first enters the dechlorination reactor to remove chlorine, fluorine and part of the smoke in the raw material, and then enters the desulfurization and denitrification reactor to further remove impurities in the raw material. After purification, the SO x Less than 10mg / m 3 , NO X Content less than 50mg / m 3 . This process can remove sulfide, nitride, fluorine, chlorine, dioxin, etc. at the same time, and has the characteristics of wide range of impurities removal, high removal precision, simple process, small pressure drop and temperature drop, less investment and low operating cost .

Description

technical field [0001] The invention relates to an integrated process for coke oven flue gas dry desulfurization, denitrification and purification, which belongs to the field of coal chemical industry. Background technique [0002] At present, my country's coke production capacity exceeds 680 million tons, and the annual output reaches more than 400 million tons, accounting for more than 70% of the global coke production capacity and output. It has become the world's largest coke producer and consumer. Furnace flue gas, calculated according to the content of sulfur dioxide in the coke oven flue gas of 250-500mg / Nm3 and the content of nitrogen oxides of 800-1300mg / Nm3, the emissions of sulfur dioxide and nitrogen oxides will reach 150,000-300,000 tons and 500,000 tons per year respectively. 10,000 to 800,000 tons. These substances are an important source of air pollutants. Therefore, if we want to win the battle to defend the blue sky, we must first solve the problem of desulfu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/50B01D53/78B01D53/86B01D53/56B01D53/70B01D49/00
CPCB01D49/00B01D53/50B01D53/70B01D53/78B01D53/8625B01D2257/20
Inventor 王泽张先茂王天元金建涛李兴建瞿玖赵志杰郑敏王瑜王国兴田曼
Owner WUHAN KELIN FINE CHEM
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