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A kind of treatment method and device of sulfur-containing flue gas

A treatment method and flue gas technology are applied in the field of sulfur-containing flue gas treatment methods and devices, which can solve the problems of long treatment process, complicated treatment process, and high treatment energy consumption, and achieve low treatment cost, high carbon sequestration efficiency, and high carbon removal efficiency. good effect

Active Publication Date: 2022-03-08
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still shortcomings such as long processing flow, complicated processing process, and high energy consumption.

Method used

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  • A kind of treatment method and device of sulfur-containing flue gas
  • A kind of treatment method and device of sulfur-containing flue gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] (1) Pass the sulfur-containing flue gas into the desulfurization reactor, and use the nitrite solution as the absorbent to remove SO 2 , so that SO 2 The removal rate is greater than 95%.

[0042] (2) In a 10L photobioreactor, add the prepared cellulosic algae SS-B7 seed liquid and microalgae medium, the amount of microalgae medium added is 6L, and the amount of seed liquid added is 0.9L. CO in desulfurization flue gas 2 The content of NO is 5v%, the NO content is 0.03v%, and the ventilation volume is 0.5vvm. The light intensity for cultivation was 5000Lux, the cultivation temperature was 25°C, the light cycle was 24h, and the light-dark time ratio was 14:10. In the collected exhaust gas, CO 2 The removal rate is 85%, and the NO removal rate is 35%.

[0043] (3) After 7 days of culture, microalgae cells and filtrate were harvested by centrifugation. Determine dry cell weight and lipid content. After vacuum freeze-drying at -60°C to constant weight, the dry weight...

Embodiment 2

[0046] (1) Pass the sulfur-containing flue gas into the desulfurization reactor, and use the nitrite solution as the absorbent to remove SO 2 , so that SO 2 The removal rate is greater than 95%.

[0047] (2) In a 10L photobioreactor, add the prepared cellulosic algae SS-B7 seed liquid and microalgae medium, the amount of microalgae medium added is 6L, and the amount of seed liquid added is 1.0L. CO in desulfurization flue gas 2 The content of NO is 10v%, the NO content is 0.05v%, and the ventilation volume is 0.5vvm. The light intensity for cultivation was 5000Lux, the cultivation temperature was 25°C, the light cycle was 24h, and the light-dark time ratio was 14:10. In the collected exhaust gas, CO 2 The removal rate was 76%, and the NO removal rate was 31%.

[0048] (3) After 8 days of culture, microalgae cells and filtrate were harvested by centrifugation. Determine dry cell weight and lipid content. After vacuum freeze-drying at -60°C to constant weight, the dry wei...

Embodiment 3

[0051] (1) Pass the sulfur-containing flue gas into the desulfurization reactor, and use the nitrite solution as the absorbent to remove SO 2 , so that SO 2 The removal rate is greater than 95%.

[0052] (2) In a 10L photobioreactor, add the prepared cellulosic algae SS-B7 seed solution and microalgae medium, the amount of microalgae medium added is 6L, and the amount of seed solution added is 1.2L. CO in desulfurization flue gas 2 The content of NO is 40v%, the NO content is 0.05v%, and the ventilation volume is 0.25vvm. The light intensity for cultivation was 5000Lux, the cultivation temperature was 25°C, the light cycle was 24h, and the light-dark time ratio was 14:10. In the collected exhaust gas, CO 2 The removal rate is 56%, and the NO removal rate is 22%.

[0053] (3) After 8 days of culture, microalgae cells and filtrate were harvested by centrifugation. Determine dry cell weight and lipid content. After vacuum freeze-drying at -60°C to constant weight, the dry ...

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Abstract

The invention relates to a treatment method and device for sulfur-containing flue gas. The sulfur-containing flue gas is passed into a desulfurization reactor, and the absorbent is a nitrite solution; the desulfurization flue gas is passed into a photobioreactor for microalgae cultivation. Collecting exhaust gas, the microalgae are microalgae tolerant to NOx; separating the culture system from solid to liquid, harvesting microalgae cells and filtrate respectively; adding sodium peroxide to the filtrate, and passing the exhaust gas into the filtrate to obtain purification gas; after the reaction, the filtrate is reused as a desulfurization absorbent. The invention can effectively remove CO in flue gas 2 , NO X , SO 2 , without the use of catalysts and a large number of absorbents, it has the advantages of good removal effect, low treatment cost, economical and environmental protection.

Description

technical field [0001] The invention belongs to the technical field of flue gas treatment, and in particular relates to a treatment method and device for sulfur-containing flue gas. Background technique [0002] Nitrogen oxides (NOx) have N 2 O, NO, NO 2 , N 2 o 3 , N 2 o 4 and N 2 o 5 and other forms, and can cause a variety of hazards, such as photochemical smog can be produced with volatile organic compounds (VOC) in the atmosphere, which can cause strong irritation to the eyes and throat, and cause headaches and respiratory diseases. cause death. my country's NOx emissions have exceeded 20 million tons for many years in a row, 21.94 million tons in 2010, 24.043 million tons in 2011, 23.378 million tons in 2012, 22.273 million tons in 2013, and 20.78 million tons in 2014. In recent years, it has shown a continuous downward trend, but its pollution situation is still serious. Since 2003, my country's SO 2 The total emissions have also remained high. In 2014, my c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/18B01D53/14B01D53/84B01D53/78B01D53/75B01D53/56C12N1/12C12R1/89
CPCY02P20/59Y02A50/20Y02C20/40
Inventor 赵磊师文静王新
Owner CHINA PETROLEUM & CHEM CORP
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