Treatment method and device for sulfur dioxide-containing waste gas

Abstract

The invention relates to a treatment method of sulfur dioxide-containing waste gas; the sulfur dioxide-containing waste gas is compressed in a compression unit and enters an adsorption unit for adsorption; an adsorption material adopted by the adsorption unit is a modified MIL-(Al) metal organic framework material, desorption is performed after adsorption penetration, desorbed gas is compressed and condensed in the liquefaction unit, and non-condensable gas and compressed flue gas are mixed and then enter the adsorption tower. According to the invention, efficient physical adsorption and liquefaction recovery of sulfur dioxide can be realized, frequent operation is not needed, 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 specifically relates to a method and device for treating waste gas containing sulfur dioxide. Background technique

[0002] Since coal and petroleum usually contain sulfur compounds, SO will be generated during combustion 2 , Resulting in SO in exhaust gas 2 gas. SO 2 It is a colorless gas with pungent odor at room temperature, and is one of the main pollutants in the atmosphere. As early as the "Tenth Five-Year Plan", SO 2 It has become one of the major pollutant emission indicators for national key control emissions. SO in the air pollution emission standard implemented on July 1, 2017 2 The emission standard is limited to 100mg / m 3 , Individual devices or regions, 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. Existing desu...

Examples

Embodiment 1

[0030] Contains SO 2 The gas is catalytic cracking regeneration flue gas, which is pretreated by dust removal, cooling, dehydration and drying before compression, and SO in the exhaust gas after treatment 2 The volume concentration is 0.05~0.2% (about 285~5700mg / m 3 ), O 2 The volume concentration is 3%~5%, and the flue gas treatment capacity is 1000Nm 3 / h.

[0031] Preparation of modified MIL-(Al) metal-organic framework material: Take MIL-100(Al) as the matrix and 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, it was immersed and stirred in a 10% hydrochloric acid solution with mass concentration for 12 hours for pickling, filtered and dried at 100°C for 8 hours. Put the above materials in an aqueous solution of ethylenediamine with a volume concentration of 30%, in the presence of nitrogen, modify at 600°C for 1 hour to obtain SO 2 Adsorption material. Aft...

Embodiment 2

[0035] Contains SO 2 The gas is S-zorb adsorbent regeneration flue gas, which is pretreated by dust removal, cooling, dehydration and drying before compression, and SO in the exhaust gas after treatment 2 The volume concentration is 2%~5%, O 2 The volume concentration is less than 0.2%, and the flue gas processing capacity is 500Nm 3 / h.

[0036] Preparation of modified MIL-(Al) metal-organic framework material: Take MIL-100(Al) as the matrix and 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, it was immersed and stirred in a 10% hydrochloric acid solution with mass concentration for 12 hours for pickling, filtered and dried at 100°C for 8 hours. Put the above materials in an aqueous solution of ethylenediamine with a volume concentration of 30%, in the presence of nitrogen, modify at 600°C for 1 hour to obtain SO 2 Adsorption material. After testing, the speci...

Embodiment 3

[0040] Contains SO 2 The gas is catalytic cracking regeneration flue gas, which is pretreated by dust removal, cooling, dehydration and drying before compression, and SO in the exhaust gas after treatment 2 The volume concentration is 0.05%~0.2%, O 2 The volume concentration is 3%~5%, and the flue gas treatment capacity is 1000Nm 3 / h.

[0041] Preparation of modified MIL-(Al) metal-organic framework material: Take MIL-100(Al) as the matrix and 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, it was immersed and stirred in a 10% hydrochloric acid solution with mass concentration for 12 hours for pickling, filtered and dried at 100°C for 8 hours. Put the above materials in an aqueous solution of ethylenediamine with a volume concentration of 30%, in the presence of nitrogen, modify at 600°C for 1 hour to obtain SO 2 Adsorption material. After testing, the specifi...

Technical field

[0001] The invention belongs to the technical field of waste gas treatment, and specifically relates to a method and device for treating waste gas containing sulfur dioxide. Background technique

[0002] Since coal and petroleum usually contain sulfur compounds, SO will be generated during combustion 2 , Resulting in SO in exhaust gas 2 gas. SO 2 It is a colorless gas with pungent odor at room temperature, and is one of the main pollutants in the atmosphere. As early as the "Tenth Five-Year Plan", SO 2 It has become one of the major pollutant emission indicators for national key control emissions. SO in the air pollution emission standard implemented on July 1, 2017 2 The emission standard is limited to 100mg / m 3 , Individual devices or regions, 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. Existing desu...

Examples

Embodiment 1

[0030] Contains SO 2 The gas is catalytic cracking regeneration flue gas, which is pretreated by dust removal, cooling, dehydration and drying before compression, and SO in the exhaust gas after treatment 2 The volume concentration is 0.05~0.2% (about 285~5700mg / m 3 ), O 2 The volume concentration is 3%~5%, and the flue gas treatment capacity is 1000Nm 3 / h.

[0031] Preparation of modified MIL-(Al) metal-organic framework material: Take MIL-100(Al) as the matrix and 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, it was immersed and stirred in a 10% hydrochloric acid solution with mass concentration for 12 hours for pickling, filtered and dried at 100°C for 8 hours. Put the above materials in an aqueous solution of ethylenediamine with a volume concentration of 30%, in the presence of nitrogen, modify at 600°C for 1 hour to obtain SO 2 Adsorption material. Aft...

Embodiment 2

[0035] Contains SO 2 The gas is S-zorb adsorbent regeneration flue gas, which is pretreated by dust removal, cooling, dehydration and drying before compression, and SO in the exhaust gas after treatment 2 The volume concentration is 2%~5%, O 2 The volume concentration is less than 0.2%, and the flue gas processing capacity is 500Nm 3 / h.

[0036] Preparation of modified MIL-(Al) metal-organic framework material: Take MIL-100(Al) as the matrix and 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, it was immersed and stirred in a 10% hydrochloric acid solution with mass concentration for 12 hours for pickling, filtered and dried at 100°C for 8 hours. Put the above materials in an aqueous solution of ethylenediamine with a volume concentration of 30%, in the presence of nitrogen, modify at 600°C for 1 hour to obtain SO 2 Adsorption material. After testing, the speci...

Embodiment 3

[0040] Contains SO 2 The gas is catalytic cracking regeneration flue gas, which is pretreated by dust removal, cooling, dehydration and drying before compression, and SO in the exhaust gas after treatment 2 The volume concentration is 0.05%~0.2%, O 2 The volume concentration is 3%~5%, and the flue gas treatment capacity is 1000Nm 3 / h.

[0041] Preparation of modified MIL-(Al) metal-organic framework material: Take MIL-100(Al) as the matrix and 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, it was immersed and stirred in a 10% hydrochloric acid solution with mass concentration for 12 hours for pickling, filtered and dried at 100°C for 8 hours. Put the above materials in an aqueous solution of ethylenediamine with a volume concentration of 30%, in the presence of nitrogen, modify at 600°C for 1 hour to obtain SO 2 Adsorption material. After testing, the specifi...

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