Enrichment purification method of SO2 in flue gas

A flue gas and enrichment technology, which is applied in the chemical industry, can solve the problems of inability to recycle the absorbent, high production cost, waste of resources, etc., and achieve the effects of resource disposal, production cost reduction, and high desulfurization efficiency.

Inactive Publication Date: 2013-09-11
SHANDONG HUMON SMELTING
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Problems solved by technology

[0003] The purpose of the present invention is to overcome the above-mentioned deficiencies in the prior art, and provide a kind of SO in flue gas 2 The method of enrichment and purification mainly solves the problems of low absorption rate, non-recyclable absorbent, high production cost and waste of resources in the existing methods

Method used

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Embodiment Construction

[0017] For a better understanding and implementation, the present invention will be described in detail below in conjunction with the examples; the given examples are only used to explain the present invention, rather than limit the scope of the present invention; take the desulfurization of acid tail gas as an example:

[0018] aFlue gas desulfurization: The acid-making tail gas containing 0.3% sulfur dioxide enters the supergravity absorption tower from the side, and is in countercurrent contact with the circulating absorption liquid in the absorption tower, that is, the polymer organic absorbent, and the SO in the tail gas 2 Absorbed, the reaction makes the polymer organic absorbent become SO-containing 2 The rich liquid, the tail gas after desulfurization is detected by SO 2 The concentration reaches 70mg / m 3 , direct discharge;

[0019] Principle: SO 2 + H 2 O → H 2 SO 3 →H + + HSO 3 -

[0020] B + H + + HSO 3 - → BH + + HSO 3 -

[0021] B+SO 2 ...

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Abstract

The invention discloses an enrichment purification method of SO2 in flue gas. The method is characterized by comprising the technique steps of: SO2 in the flue gas is absorbed and desulfurized by a macromolecular organic absorbent, the pregnant solution resolves when the absorption liquid enriches to certain concentration, and the resolved and purified SO2 can be used for producing sulfuric acid or liquid sulfur dioxide; when the SO2 is resolved, such impurity ions as SO42 in the macromolecular organic absorbent enriches to certain concentration to affect the absorption of the SO2, the impurity ions are filtered and removed through an ion exchange membrane, and the purified macromolecular organic absorbent is recycled in the procedures. The method is capable of comprehensively utilizing the resources, simple to allocate equipment, stable to operate, convenient to control and capable of lowering the production cost, the absorbent can be recycled, and the emission concentration of the tail gas SO2 is much lower than that of the national standard.

Description

Technical field: [0001] The invention relates to the technical field of chemical industry, in particular to a kind of SO in flue gas 2 The method of enrichment and purification. Background technique: [0002] At present, the absorbents used to absorb sulfur dioxide in flue gas generally have defects such as low absorption rate, non-recyclable absorbent, and high production cost; and sulfur dioxide in flue gas cannot be reused after being absorbed, resulting in waste of resources. Invention content: [0003] The purpose of the present invention is to overcome the above-mentioned deficiencies in the prior art, and provide a kind of SO in flue gas 2 The method of enrichment and purification mainly solves the problems of low absorption rate, non-recyclable absorbent, high production cost and waste of resources in the existing methods. [0004] The technical scheme of the present invention is: a kind of SO in flue gas 2 The method of enrichment and purification is special in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B17/56B01D53/78B01D53/50
Inventor 张俊峰王元马少卫邹琳靖雪松刘然伟
Owner SHANDONG HUMON SMELTING
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