Absorbent for flue gas desulfurization and preparation method and application of composition of absorbent

The technology of an absorbent and a composition is applied in the fields of absorbent for flue gas desulfurization and its preparation and composition, which can solve the problems of low strength, high cost, complicated preparation process, etc., and achieve high recycling rate, Effects of cost reduction and less dust

Active Publication Date: 2021-10-15
ZHONGJING ENVIRONMENTAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation process is complicated, the cost is high, and the strength is low

Method used

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  • Absorbent for flue gas desulfurization and preparation method and application of composition of absorbent
  • Absorbent for flue gas desulfurization and preparation method and application of composition of absorbent
  • Absorbent for flue gas desulfurization and preparation method and application of composition of absorbent

Examples

Experimental program
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preparation example Construction

[0037]

[0038] The preparation method of the present invention comprises the following steps: (1) dry mixing lime powder, iron powder, steel slag, bentonite, urea and cement to obtain a first mixture; (2) wet mixing the first mixture with water to obtain a second mixture; (3) The second mixture is granulated, and then dried to obtain an absorbent. The amount of each raw material is as described above, and will not be repeated here.

[0039] Dry mixing can be performed in a kneader. The dry mixing time is 10-30 min; preferably 10-20 min; more preferably 15-20 min.

[0040] Wet mixing can be performed in a kneader. Water can be added to the first mixture in multiple times, for example 3-5 times. The wet mixing time may be 20-50 min; preferably 25-40 min; more preferably 30-40 min.

[0041] Granulation can be performed in a granulator.

[0042] The drying temperature may be 150-300°C; preferably 200-300°C; more preferably 200-250°C. The drying time may be 1-5 hours; pref...

Embodiment 1～3

[0055] Lime powder, iron powder, steel slag, bentonite, urea and cement were dry mixed in a kneader for 15 minutes to obtain the first mixture;

[0056] Add deionized water into the first mixture three times, and wet mix for 30 minutes to obtain the second mixture;

[0057] The second mixture is granulated in a granulator to obtain cylindrical composite particles; the particle diameter of the composite particles is 5-10 mm, and the length is 8-15 mm.

[0058] The composite particles were dried at 200°C for 3 hours, and the absorbent was obtained after cooling.

[0059] The amount of each raw material is shown in Table 1, and the performance of the absorbent is shown in Table 2.

[0060] Table 1

[0061] Example 1 Example 2 Example 3 Lime powder (parts by weight) 56 58 53 Iron powder (parts by weight) 10 10 10 Steel slag (parts by weight) 12 12 12 Bentonite (parts by weight) 4 4 4 Urea (parts by weight) 10 8 13 Ceme...

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Abstract

The invention discloses an absorbent for flue gas desulfurization and a preparation method thereof. The absorbent is prepared from the following raw materials in parts by weight: 45-65 parts of lime powder, 5-25 parts of iron powder, 5-20 parts of steel slag, 1-10 parts of bentonite, 5-15 parts of urea and 3-15 parts of cement. The absorbent is low in manufacturing cost, high in strength and relatively high in breakthrough sulfur capacity. The invention also discloses application of the composition.

Description

technical field [0001] The invention relates to an absorbent for flue gas desulfurization, a preparation method and the application of the composition. Background technique [0002] Sulfur dioxide is an irritating sulfur oxide and one of the main pollutants in the atmosphere. Since coal and petroleum typically contain elemental sulfur, sulfur dioxide is formed when burned. When sulfur dioxide dissolves in water, sulfurous acid is formed. If sulfurous acid is further oxidized in the presence of PM2.5, sulfuric acid will be produced rapidly and efficiently. Sulfuric acid is the main component of acid rain, which will cause serious environmental pollution. [0003] CN1891329A discloses a calcium carbonate and iron powder composite desulfurizer, which uses calcium carbonate and iron powder mixed, and the particle size of calcium carbonate and iron powder is 300-400 mesh. The composite desulfurizer simply mixes calcium carbonate and iron powder, and then sprays it in liquid f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/50B01D53/60B01D53/81
CPCB01D53/508B01D53/60B01D53/81B01D2251/404B01D2251/606B01D2251/2067B01D2251/602B01D2258/0283Y02A50/20
Inventor 王春霞张焜魏闯
Owner ZHONGJING ENVIRONMENTAL TECH CO LTD
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