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Absorbent for selectively absorbing sulfur dioxide and application thereof

A sulfur dioxide and absorbent technology, which is applied in chemical instruments and methods, dispersed particle separation, separation methods, etc., can solve the problem that the absorption rate cannot be maintained at a high level for a long time, which is not conducive to the subsequent utilization of regenerated acid gas, and the increase in solvent circulation and other issues, to achieve the effect of being conducive to recycling, anti-oxidation ability, not easy to foam, and good thermal stability

Inactive Publication Date: 2016-10-05
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It will also lead to an increase in solvent circulation, an increase in regeneration energy consumption, and it is not conducive to the subsequent utilization of regenerated acid gas
[0005] In summary, there are at least the following problems in the prior art: the existing SO with organic amine as the main body 2 Absorbent vs. SO 2 The absorption rate cannot be maintained at a high level for a long time

Method used

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  • Absorbent for selectively absorbing sulfur dioxide and application thereof
  • Absorbent for selectively absorbing sulfur dioxide and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] This embodiment provides a kind of SO of the present invention 2 Absorbent, and evaluate its selectivity and regeneration performance.

[0061] The composition of the absorbent is as follows:

[0062] N,N,N,N-Tetramethylethylenediamine, 10% by mass;

[0063] Piperazine, mass percent 15%;

[0064] The total molar ratio of sulfuric acid to N,N,N,N-tetramethylethylenediamine and piperazine is (0.5~0.6):1;

[0065] Hydroquinone, mass percent 0.2%;

[0066] Ethylenediamine, 5% by mass;

[0067] water, balance.

[0068] The SO 2 The initial pH value of the absorbent is 4.5-6.0.

[0069] Absorb SO 2 operating conditions:

[0070] Temperature: 50°C, Pressure: absolute pressure 0.1MPa,

[0071] Mixture composition: SO 2 2.0Vol% (volume percent, the same below), CO 2 10.0Vol%, O 2 3.0Vol%;

[0072] Volume flow rate 300mL / min;

[0073] Absorbent dosage 50mL.

[0074] Regenerated SO 2 operating conditions:

[0075] Temperature: 100°C, pressure: absolute pressure 0...

Embodiment 2

[0081] This embodiment provides a kind of SO of the present invention 2 Absorbent, and evaluate its selectivity and regeneration performance.

[0082] The composition of the absorbent is as follows:

[0083] N,N,N,N-Tetrahydroxyethylethylenediamine, 10% by mass;

[0084] Piperazine, 15% by mass

[0085] The total molar ratio of sulfuric acid to N,N,N,N-tetramethylethylenediamine and piperazine is (0.5~0.6):1;

[0086] Hydroquinone, mass percentage 0.1%;

[0087] Ethylenediamine, 3% by mass;

[0088] water, balance.

[0089] The SO 2 The initial pH value of the absorbent is 4.5-6.0.

[0090] Absorb SO 2 operating conditions:

[0091] Temperature: 60°C, Pressure: absolute pressure 0.1MPa,

[0092] Mixture composition: SO 2 2.0Vol% (volume percent, the same below), CO 2 10.0Vol%, O 2 3.0Vol%;

[0093] Volume flow rate 300mL / min,

[0094] Absorbent dosage 50mL.

[0095] Regenerated SO 2 Operating conditions:

[0096] Temperature: 100°C, pressure: absolute pressur...

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Abstract

The invention discloses an absorbent for selectively absorbing sulfur dioxide and an application thereof, which belong to the technical fields of environmental protection and gas purification. The absorbent comprises the following components by mass percentage: 5-80% of organic multi-amine; inorganic strong acid, wherein the mol ratio of the inorganic strong acid to the organic multi-amine is (0.3-1.2):1; 0.01-1.00%of an antioxidant, 0.01-8.00% of a desulfuration activator, and the balance of water; and the pH value of the absorbent is 4.0-6.5. The SO2 absorbent has high absorptivity and selectivity on SO2, SO2 can be absorbed from a mixing gas containing SO2 and CO2, but CO2 is not absorbed, the initial absorption rate can reach 100%, the absorption rate can still reach more than 99% in 30 minutes, and the absorbent is suitable for purifying the industrial exhaust gas containing SO2, especially the exhaust gas of a sulfur recovery device. The SO2 absorbent has good renewable performance and stability, and is in favor of cyclic utilization of the absorbent.

Description

technical field [0001] The invention relates to an absorbent for selectively absorbing sulfur dioxide and its application, belonging to the technical fields of environmental protection and gas purification. Background technique [0002] Sulfur dioxide (SO 2 ) is a colorless gas with a strong pungent smell. It is one of the main air pollutants at present and will cause great harm to human health and the environment. It is also one of the main causes of severe weather such as acid rain and smog in recent years. SO 2 Pollution has become an important factor restricting the healthy development of my country's economy and society. With the rapid development of my country's economy, the scale of major industries such as thermal power, mineral smelting, and oil extraction and refining is increasing year by year. In the production process, SO 2 Mainly polluting gas emissions surged simultaneously. Since 1995, my country surpassed Europe and the United States to become the world'...

Claims

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Application Information

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IPC IPC(8): B01D53/78B01D53/50
Inventor 杨威常宏岗何金龙吴明鸥杨亚宇
Owner PETROCHINA CO LTD
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