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Flue gas desulfurization and denitration agent, preparation method and application thereof

A technology of desulfurization and denitrification, dry flue gas desulfurization, applied in the field of flue gas desulfurization and denitrification agent based on calcium carbide slag and its preparation, can solve the problems of high cost, huge equipment operation cost, no consideration of the use of denitrification agent, etc., and achieve simple preparation method , reduced dosage and low cost

Inactive Publication Date: 2018-02-02
ZHONGJING ECO IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] On the one hand, the above-mentioned processes all use calcium carbide slag as a desulfurizer alone, and do not consider using it as a denitrification agent
At the same time, the above processes are all wet desulfurization processes, which are prone to produce a large amount of industrial waste liquid
On the other hand, the active ingredient content of calcium carbide slag desulfurization and denitrification is 25-30wt%. If a single calcium carbide slag is used for desulfurization and denitrification, a large amount of calcium carbide slag is required per unit of desulfurization and denitrification efficiency. resulting in bulky equipment and high operating costs

Method used

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  • Flue gas desulfurization and denitration agent, preparation method and application thereof
  • Flue gas desulfurization and denitration agent, preparation method and application thereof
  • Flue gas desulfurization and denitration agent, preparation method and application thereof

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preparation example Construction

[0040] The flue gas desulfurization and denitrification agent of the present invention can be prepared by conventional methods. For example, mix calcium carbide slag, magnesium oxide and catalyst evenly to obtain the product. In addition, the preparation method of the present invention also includes a processing step of carbide slag: the carbide slag product is dried, crushed and screened to obtain carbide slag with a particle size of less than 200 mesh.

[0041]

[0042] The flue gas desulfurization and denitrification agent of the invention is used for dry flue gas desulfurization and denitrification. According to one embodiment of the present invention, the desulfurization and denitration agent dry powder is fully mixed with the flue gas after pre-dust removal in the flue gas pipeline, and then enters the absorption tower for desulfurization and denitration treatment, and the desulfurized and denitrified flue gas is discharged from the chimney. The dry flue gas desulfuri...

Embodiment 1

[0056] The desulfurization and denitrification agent in this embodiment consists of 5 parts by weight of magnesium oxide, 3 parts by weight of catalyst and 92 parts by weight of carbide slag. The active magnesium oxide of magnesium oxide is greater than 70wt%, the particle size is less than 100 mesh powder, and the catalyst is TiO 2 Carbide slag is a finished product with a particle size of less than 200 mesh obtained after grinding the carbide slag product produced by the dry acetylene process. Carbide slag, magnesium oxide and catalyst are evenly mixed to obtain desulfurization and denitrification agent A1.

[0057] After desulfurization and denitrification with desulfurization and denitrification agent A1, the flue gas data at the outlet is detected, as shown in the table below.

[0058]

[0059] It can be seen from the table that the desulfurization efficiency of the desulfurization and denitrification agent can reach 95wt%, and the denitrification efficiency can reach...

Embodiment 2

[0061] The desulfurization and denitrification agent in this embodiment consists of 10 parts by weight of magnesium oxide, 2.4 parts by weight of catalyst and 87.6 parts by weight of carbide slag. The active magnesium oxide of magnesium oxide is greater than 75wt%, the particle size is less than 100 mesh powder, and the catalyst is Al(OH) 3 Carbide slag is a finished product with a particle size of less than 200 mesh obtained after grinding the carbide slag product produced by the dry acetylene process. Carbide slag, magnesium oxide and catalyst are evenly mixed to obtain desulfurization and denitrification agent A2.

[0062] After desulfurization and denitrification with desulfurization and denitrification agent A2, the flue gas data at the outlet is detected, as shown in the table below.

[0063]

[0064]

[0065] It can be seen from the table that the desulfurization efficiency of the desulfurization and denitrification agent can reach 96wt%, and the denitrification ...

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Abstract

The invention discloses a flue gas desulfurization and denitration agent, a preparation method and application thereof. The flue gas desulfurization and denitration agent comprises the following components: 70-93 parts by weight of carbide slag, 5-25 parts by weight of magnesium oxide, and 1-5 parts by weight of a catalyst, wherein the catalyst is selected from one or more of TiO2, Al(OH)3, V2O5,WO3, K2O, binuclear ferrocobalt phthalocyanine (II) or CaSiO3, and the flue gas desulfurization and denitration agent does not contain calcium oxide. The flue gas desulfurization and denitration agentprovided by the invention can remove SO2 and NOX from flue gas simultaneously. In addition, during use of the flue gas desulfurization and denitration agent provided by the invention, under the premise of satisfying high desulfurization and denitration efficiency, the carbide slag dosage needed by unit removal can be significantly reduced.

Description

technical field [0001] The invention relates to a flue gas desulfurization and denitrification agent and its preparation method and application, in particular to a calcium carbide slag-based flue gas desulfurization and denitrification agent and its preparation method and application. Background technique [0002] In terms of air pollution, SO 2 and NO X is the main pollutant. In a series of standards and regulations such as "Comprehensive Emission Standard of Air Pollutants GB16297-1996" promulgated by the state, the emission content is clearly limited. Because the two exist in the flue gas at the same time, if the method of removing them separately will bring problems such as a large number of equipment, a large floor area, complicated operation, and a large initial investment. SO 2 and NO X They are all acidic oxides, and it is completely feasible to remove them at the same time. At present, there are some industrial demonstration and commercial operation devices. A...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/60B01D53/81
CPCB01D53/60B01D53/81B01D2251/402B01D2251/404B01D2251/602B01D2251/604B01D2258/0283Y02A50/20
Inventor 童裳慧
Owner ZHONGJING ECO IND CO LTD
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