Treatment method and device for sulfur dioxide-containing flue gas

A sulfur dioxide and treatment method technology, applied in the direction of gas treatment, chemical instruments and methods, separation methods, etc., can solve the problems of uneconomical, no adsorption and concentration methods, 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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  • Treatment method and device for sulfur dioxide-containing flue gas
  • Treatment method and device for sulfur dioxide-containing flue gas

Examples

Experimental program
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Effect test

Embodiment 1

[0030] Contains SO 2 The gas is the regenerated flue gas of S-zorb adsorbent, which is subjected to dust removal and cooling pretreatment before compression and condensation, and the SO in the exhaust gas after treatment 2 The volume concentration of water is 2% to 5%, the volume content of water is 2.2% to 2.6%, O 2 The volume concentration is less than 0.2%, and the flue gas treatment capacity is 500Nm 3 / h.

[0031] Preparation of modified MIL-(Al) metal-organic framework materials: using MIL-100(Al) as the matrix, the specific surface area is 1180m 2 / g, the pore volume is 0.64cm 3 / g, the Al content is 15.2%. In the presence of nitrogen, after carbonization at 800°C for 6 hours, soak and stir in 10% hydrochloric acid solution for 12 hours for pickling, filter and dry at 100°C for 8 hours. The above materials were placed in an aqueous solution of ethylenediamine with a volume concentration of 30%, and modified at 600°C for 1 hour in the presence of nitrogen to obtain ...

Embodiment 2

[0035] Contains SO 2 The gas is the regenerated flue gas of S-zorb adsorbent, which is subjected to dust removal and cooling pretreatment before compression and condensation, and the SO in the exhaust gas after treatment 2 The volume concentration of water is 2% to 5%, the volume content of water is 2.2% to 2.6%, O 2 The volume concentration is less than 0.2%, and the flue gas treatment capacity is 500Nm 3 / h.

[0036] Preparation of modified MIL-(Al) metal-organic framework materials: using MIL-100(Al) as the matrix, the specific surface area is 1180m 2 / g, the pore volume is 0.64cm 3 / g, the Al content is 15.2%. In the presence of nitrogen, after carbonization at 800°C for 6 hours, soak and stir in 10% hydrochloric acid solution for 12 hours for pickling, filter and dry at 100°C for 8 hours. The above materials were placed in an aqueous solution of ethylenediamine with a volume concentration of 30%, and modified at 600°C for 1 hour in the presence of nitrogen to obtain ...

Embodiment 3

[0040] Contains SO 2The gas is catalytic cracking regenerated flue gas, which is subjected to dust removal and cooling pretreatment before compression, and SO in the treated exhaust gas 2 The volume concentration of water is 0.05-0.2%, the volume content of water is about 8%-10%, O 2 The volume concentration is 3% to 5%, and the flue gas treatment capacity is 1000Nm 3 / h.

[0041] Preparation of modified MIL-(Al) metal-organic framework materials: using MIL-100(Al) as the matrix, the specific surface area is 1180m 2 / g, the pore volume is 0.64cm 3 / g, the Al content is 15.2%. In the presence of nitrogen, after carbonization at 800°C for 6 hours, soak and stir in 10% hydrochloric acid solution for 12 hours for pickling, filter and dry at 100°C for 8 hours. The above materials were placed in an aqueous solution of ethylenediamine with a volume concentration of 30%, and modified at 600°C for 1 hour in the presence of nitrogen to obtain SO 2 Adsorbent material. After testin...

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Abstract

The invention relates to a treatment method of sulfur dioxide-containing flue gas, which comprises the following steps: compressing and condensing the sulfur dioxide-containing flue gas in a compressing and condensing unit, feeding into a condensing and liquefying unit, feeding non-condensable gas into an adsorption unit for adsorption, and discharging purified gas after reaching the standard, wherein an adsorption material adopted by the adsorption unit is a modified MIL-(Al) metal organic framework material, desorption is performed after adsorption penetration, and desorbed gas and to-be-treated flue gas are mixed and enter the compressing and condensing unit. According to the invention, efficient physical adsorption and recovery of SO2 can be realized, the liquefaction energy consumption is relatively low, 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 waste gas treatment, and in particular relates to a treatment method and device for flue gas containing sulfur dioxide. 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 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/00B01D53/02
CPCB01D53/002B01D53/02B01D2253/204B01D2257/302B01D2258/0283B01D2259/4009
Inventor 方向晨赵磊刘忠生刘志禹汪鹏齐慧敏
Owner CHINA PETROLEUM & CHEM CORP
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