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Recyclable polymer sulfur dioxide absorbent

A sulfur dioxide and polymer technology, applied in separation methods, dispersed particle separation, chemical instruments and methods, etc., can solve problems such as property changes and weak stability of small molecules

Inactive Publication Date: 2020-11-10
SICHUAN YINENG KANGSHENG ENVIRONMENTAL PROTECTION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The above absorbents are composed of small molecular organic / inorganic substances. Due to the weak stability of small molecular substances, the composition is easy to decompose in practical application, resulting in changes in its properties.

Method used

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  • Recyclable polymer sulfur dioxide absorbent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The absorbent consists of:

[0028] Polymer 30% (weight) of peroxybenzoic acid, 10% (weight) of sodium salicylate, 2.5% (weight) of malic acid, 7.5% (weight) of sodium nitrate, and the remainder is water.

[0029] Absorbent pH 3.

[0030] The absorbent is prepared by uniformly mixing the above-mentioned constituents in each content. The obtained absorbent composition is placed in a chemical plant such as figure 1 Absorption and desorption of SO by combustion acid production shown 2 during the process. Measured SO before recovery 2 The content is 21748mg / Nm 3 , SO after purification 2 The content is 21. The absorption rate of the composition to sulfur dioxide can reach 99.90%. Therefore, using this absorbent formula, the desulfurization efficiency is high, and the product SO 2 High gas content and stable quality.

Embodiment 2

[0032] The absorbent consists of:

[0033] 21% (weight) of polymer of peroxyketal, 15% (weight) of ether+methyl formate, 1.0% (weight) of citric acid, 10% (weight) of sodium chloride, and the rest is water.

[0034] Absorbent pH 4.

[0035] The absorbent is prepared by uniformly mixing the above-mentioned constituents in each content. The obtained absorbent composition is placed in a chemical plant such asfigure 1 Absorption and desorption of SO by combustion acid production shown 2 during the process. Measured SO before recovery 2 The content is 4730mg / Nm 3 , SO after purification 2 The content is 25. As a result, it was measured that the absorption rate of the composition to sulfur dioxide can reach 99.47%. Therefore, using this solution formula, the absorbent has a strong purification ability and can remove the SO in the flue gas. 2 Removal to 30mg / Nm 3 Below, achieve ultra-clean emissions.

Embodiment 3

[0037] The absorbent consists of:

[0038] 40% (weight) of the polymer of peroxybenzoic acid+peroxyketal, 5% (weight) of ether+methyl formate, 5% (weight) of tartaric acid, 5% (weight) of sodium chloride, and the rest of the ingredients It is water.

[0039] Absorbent pH 2.

[0040] The absorbent is prepared by uniformly mixing the above-mentioned constituents in each content. The obtained absorbent composition is placed in a chemical plant such as figure 1 Absorption and desorption of SO by combustion acid production shown 2 during the process. Measured SO before recovery 2 The content is 1453mg / Nm 3 , SO after purification 2 The content is 11. As a result, it is measured that the absorption rate of the composition to sulfur dioxide can reach 99.24%. Therefore, using this solution formula, the absorbent has a strong purification ability and can remove the SO in the flue gas. 2 Removal to 20mg / Nm 3 Below, achieve ultra-clean emissions.

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Abstract

The invention discloses a recyclable high-molecular sulfur dioxide absorbent. The absorbent comprises a peroxy acid high-molecular oxidant, a cosolvent, an organic acid and a metal salt. The additivecomprises the following components in parts by mass: 20-40 parts of a peroxy acid polymer oxidant; 5-15 parts of a cosolvent; 1-5 parts of an organic acid; 5-10 parts of a metal salt; and water as thebalance. The absorbent composition provided by the invention has a very good removal effect on sulfur dioxide, and can be widely applied to the industry.

Description

technical field [0001] The invention relates to the field of sulfur dioxide desulfurization absorbents, in particular to a recyclable polymer sulfur dioxide absorbent. Background technique [0002] SO emissions from coal combustion 2 NOx and NOx are the main air pollutants and the main source of acid rain and photochemical smog. Over the years, the state has been interested in SO 2 The control of NOx and NOx has always been attached great importance, and a large number of relevant policies and regulations have been issued to limit its emissions. However, the flue gas desulfurization-selective catalytic reduction denitrification (FGD-SCR) process widely used in coal-fired power plants at home and abroad is only for the treatment of flue gas SO 2 The hierarchical treatment of NOx and NOx is not an integrated simultaneous removal technology. It has disadvantages such as high equipment investment and operation and maintenance costs, large floor area, complex system, and secon...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/14
CPCB01D53/1418B01D53/1425B01D53/1481B01D53/1493B01D2252/50B01D2258/0283
Inventor 汪志和崔广才陈光祥张明俊
Owner SICHUAN YINENG KANGSHENG ENVIRONMENTAL PROTECTION TECH CO LTD
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