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Comprehensive processing technology for conducting deep dust removal, denitration and desulphurization on glass kiln smoke

A desulfurization and denitrification, glass kiln technology, applied in the field of flue gas purification, can solve the problems such as easy blockage of bag filter material, low dust removal and desulfurization and denitrification efficiency, and easy poisoning of SCR catalyst by sodium salt steam. Improved performance and improved breathability

Active Publication Date: 2016-03-30
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a glass furnace flue gas deep dust removal and desulfurization and denitrification in order to overcome the defects of the above-mentioned prior art that the bag filter material is easy to block, the sodium salt vapor is easy to poison the SCR catalyst, and the efficiency of dust removal and desulfurization and denitrification is not high. comprehensive approach

Method used

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  • Comprehensive processing technology for conducting deep dust removal, denitration and desulphurization on glass kiln smoke

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] like figure 1 As shown, taking the actual flue gas produced by a certain glass furnace as the treatment object, the flue gas L101 produced after passing through the glass furnace contains SO 2 , NO x , dust, sodium and other semi-volatile vapors, the gas flow rate is 40000m 3 / h. where SO 2 Concentration at 700mg / m 3 left and right, NO x The concentration is about 2000mg / m 3 , the particle concentration is 400mg / m 3 . The raw flue gas L101 is passed into the bag filter 1 through the dust removal flue, and the magnesium oxide powder is injected into the dust removal flue in front of the bag filter 1 by the circulating injection system 2 (the particle size range 200 mesh or so) mixed with dust, the dust comes from the dust collected by the dust collection bin 3 of the bag filter 1, and the amount of magnesium oxide powder used accounts for 10% of the total circulating ash. The concentration of circulating ash injected by system 2 in the flue gas is 500mg / m 3 , t...

Embodiment 2

[0033] The actual flue gas produced by a certain glass kiln is treated as the treatment object, among which SO 2 Concentration at 1000mg / m 3 Around, NOx concentration is about 2000mg / m 3 , the particle concentration is 8000mg / m 3 . Use the dry circulation injection system to inject magnesium oxide powder into the bag filter, in which the amount of magnesium oxide accounts for 2% of the total circulating ash. After a period of stability, the dust is collected for pulping and enters the wet Desulfurization tower, blowing a certain concentration of ozone (about 2000mg / m3) into the desulfurization tower 3 ), after the reaction is stable, sample and analyze the flue gas at the outlet of the bag filter and analyze each working condition. The results showed that the addition of magnesium oxide improved the easy removal performance of the filter cake of the bag filter, the SCR catalyst operated normally and was protected from poisoning, SO 2 The removal rate of NOx has reached mo...

Embodiment 3

[0035] The actual flue gas produced by a certain glass kiln is treated as the treatment object, among which SO 2 Concentration at 1000mg / m 3 effect, the NOx concentration is about 2000mg / m 3 , the particle concentration is 8000mg / m 3 . Use the dry circulation injection system to inject magnesium oxide powder into the bag filter to increase the proportion of magnesium oxide powder used. Among them, the amount of magnesium oxide accounts for 20% of the total circulating ash. After a period of stability, collect the dust for dust removal Pulp and enter the wet desulfurization tower, using the combined process of ozone-hydrogen peroxide for desulfurization and denitrification, in which the concentration of ozone is about 2000mg / m 3 , the proportion of hydrogen peroxide accounts for about 1% of the total desulfurization liquid. After the reaction is stable, sample and analyze the flue gas at the outlet of the bag filter and analyze each working condition. The results show that...

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Abstract

The invention discloses a comprehensive processing technology for conducting deep dust removal, denitration and desulphurization on glass kiln smoke, and relates to the field of glass kiln smoke processing. Raw material smoke is discharged into a smoke removal flue, magnesium-containing powder and partly-collected dust are injected into the raw material smoke and mixed with the raw material smoke, and mixed smoke is obtained; the obtained mixed smoke is injected into a bag type dust remover to be filtered, and low-dust smoke and dust are obtained; dust is divided into two parts; magnesium-containing powder is added to one part, the part is injected back into the dust removal flue through a gas flow jetting device to be mixed with the raw material smoke; water is added to the other part, and desulphurization slurry is prepared; the obtained low-dust smoke is injected into a low-temperature SCR denitration device to be subjected to denitration, and low-nitrogen and low-dust smoke is obtained; the low-nitrogen and low-dust smoke is injected into a wet type desulphurization device, the prepared desulphurization slurry is added for desulphurization, and waste gas is discharged into the atmosphere. Compared with the prior art, the comprehensive processing technology has the advantages that dust removal effect is good, denitration efficiency can be improved, recycle of waste is achieved, and smoke pollutant deep emission reduction is achieved.

Description

technical field [0001] The invention relates to the field of flue gas purification, in particular to a comprehensive treatment process for deep dust removal, desulfurization and denitrification of glass kiln flue gas. Background technique [0002] The flue gas produced by the glass kiln is one of the key industrial pollutants controlled in our country. At present, most glass furnaces mainly use coal gas as the fuel for high-temperature furnaces, and the concentration of particulate matter in the flue gas produced by them is about 8000mg / m 3 , NO x Concentration is 2000mg / m3, SO2 is about 800~1000mg / m3 3 . The current conventional dedusting and desulfurization and denitrification process is to first use the bag filter to remove the particulate matter, and then enter the low-temperature SCR section for NO x removal, and finally into the wet desulfurization equipment to remove SO 2 . However, because the glass furnace contains semi-volatile substances such as sodium salt ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D46/02B01D53/75B01D53/86B01D53/78B01D53/60B01D53/68
Inventor 晏乃强瞿赞徐浩淼赵松建黄文君梅剑全福权
Owner SHANGHAI JIAO TONG UNIV
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