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Integral process for desulfurizing, denitrating and purifying coke oven smoke by dry-method

A dry desulfurization and flue gas technology, applied in the field of coal chemical industry, can solve the problems of low practicability, low desulfurization and denitrification efficiency, large heat loss, etc., and achieves a wide range of impurity removal, less treatment costs, and lower operating costs. Effect

Active Publication Date: 2019-03-19
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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  • Integral process for desulfurizing, denitrating and purifying coke oven smoke by dry-method

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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Abstract

The invention provides an integral process for desulfurizing, denitrating and purifying coke oven smoke by a dry-method. Coke oven smoke enters a dechlorination reactor to remove chlorine, fluorine and partial fume in the raw material, enters desulfurization and denitration reactor to further remove impurities in the raw material, wherein the Sox is less than 10mg / m<3> and NOX content is less than50mg / m<3> after purification. The process can simultaneously remove sulfide, nitride, fluorine, chlorine, dioxin and the like, and has the characteristics of wide impurity removing range, high removing accuracy, simple process, small pressure and temperature drop, small investment and low operation 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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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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