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Method and device for treating SO2-containing flue gas

A treatment method and flue gas technology, applied in the direction of gas treatment, separation methods, chemical instruments and methods, etc., can solve the problems of no adsorption concentration method, uneconomical, etc.

Active Publication Date: 2020-07-07
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the sulfur dioxide concentration in the regeneration tail gas is higher than 30%, while the sulfur dioxide content in the existing industrial waste gas is usually lower than 5%. There is currently no effective adsorption and concentration method, so it is not economical

Method used

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  • Method and device for treating SO2-containing flue gas
  • Method and device for treating SO2-containing flue gas

Examples

Experimental program
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Effect test

Embodiment 1

[0027] Contains SO 2 The gas is the regenerated flue gas of S-zorb adsorbent, which is pretreated by dust removal, cooling, dehydration and drying before compression and condensation, and the SO in the exhaust gas after treatment 2 The volume concentration of O is 2% to 5%. 2 The volume concentration is less than 0.2%, and the flue gas treatment capacity is 500Nm 3 / h.

[0028] Preparation of modified zinc-based metal-organic framework materials: using MOF-5 as the matrix, the specific surface area is 1655m 2 / g, the pore volume is 1.13cm 3 / g, Zn content 31.2%. The MOFs-5 were doped with 1.0% histidine by mass, and treated at 1000 °C for 6 hours in the presence of nitrogen to obtain modified Zn-based metal-organic framework materials.

[0029] will contain SO 2 The flue gas is compressed and condensed, the gauge pressure is controlled at 2.0MPaG, and the temperature is -10°C. After compression and condensation, it enters the condensation liquefaction unit, and the cond...

Embodiment 2

[0032] Contains SO 2 The gas is the regenerated flue gas of S-zorb adsorbent, which is pretreated by dust removal, cooling, dehydration and drying before compression and condensation, and the SO in the exhaust gas after treatment 2 The volume concentration is 3% to 10%, O 2 The volume concentration is less than 0.2%, and the flue gas treatment capacity is 1000Nm 3 / h.

[0033] Preparation of modified zinc-based metal-organic framework materials: using MOF-5 as the matrix, the specific surface area is 1655m 2 / g, the pore volume is 1.13cm 3 / g, Zn content 31.2%. The MOFs-5 were doped with 1.0% histidine by mass, and treated at 1000 °C for 6 hours in the presence of nitrogen to obtain modified Zn-based metal-organic framework materials.

[0034] will contain SO 2 The flue gas is compressed and condensed, the gauge pressure is controlled at 2.0MPaG, and the temperature is -15°C. After compression and condensation, it enters the condensation liquefaction unit, and the conde...

Embodiment 3

[0037] Contains SO 2 The gas is the regenerated flue gas of S-zorb adsorbent, which is pretreated by dust removal, cooling, dehydration and drying before compression and condensation, and the SO in the exhaust gas after treatment 2 The volume concentration is 2% to 5%, O 2 The volume concentration is less than 0.2%, and the flue gas treatment capacity is 500Nm 3 / h.

[0038] Preparation of modified zinc-based metal-organic framework materials: using MOF-5 as the matrix, the specific surface area is 1655m 2 / g, the pore volume is 1.13cm 3 / g, Zn content 31.2%. The MOFs-5 were doped with 1.0% histidine by mass, and treated at 1000 °C for 6 hours in the presence of nitrogen to obtain modified Zn-based metal-organic framework materials.

[0039] will contain SO 2 The flue gas is compressed and condensed, the gauge pressure is controlled at 1.0MPaG, and the temperature is -15°C. After compression and condensation, it enters the condensation liquefaction unit, and the condens...

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Abstract

The invention relates to a method and a device for treating SO2-containing flue gas, which are characterized in that SO2-containing gas is compressed and condensed in a compressing and condensing unitand then enters a condensing and liquefying unit, non-condensable gas enters an adsorption unit for adsorption, and the purified gas is discharged after reaching the standard; an adsorbent adopted bythe adsorption unit is a modified zinc-based metal organic framework material, desorption is carried out after adsorption penetration, and desorbed gas is mixed with SO2-containing flue gas to be treated and then enters the compressing and condensing unit. According to the invention, efficient physical adsorption and liquefaction recovery of SO2 can be realized, the liquefaction energy consumption is reduced, the SO2 recovery rate is high, the operation stability is good, and the purified gas meets the emission requirements.

Description

technical field [0001] The invention belongs to the technical field of exhaust gas treatment, in particular to a 2 Flue gas treatment method and device. Background technique [0002] Since coal and petroleum typically contain sulfur compounds, SO is formed when burned 2 , resulting in SO in the exhaust gas 2 gas. SO 2 It is a colorless gas with a pungent odor at room temperature and is one of the main pollutants in the atmosphere. As early as in the "Tenth Five-Year Plan", SO 2 It has become one of the main pollutant discharge indicators that the country focuses on controlling emissions. In the air pollution emission standard implemented on July 1, 2017, SO 2 The emission standard is limited to 100mg / m 3 , some places SO 2 The emission standard requires less than 50mg / m 3 . [0003] At present, the widely used desulfurization technology can be divided into wet desulfurization technology and dry desulfurization technology. The existing desulfurization technology c...

Claims

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Application Information

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IPC IPC(8): B01D53/00B01D53/02
CPCB01D53/002B01D53/02B01D2253/204B01D2257/302B01D2258/0283B01D2259/4009
Inventor 刘忠生方向晨赵磊刘志禹齐慧敏汪鹏
Owner CHINA PETROLEUM & CHEM CORP
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