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Efficient flue gas desulfurization and denitrification method and materials adopted by same

A high-efficiency technology for desulfurization and denitrification, applied in the field of desulfurization, can solve problems such as being unsuitable for large-scale popularization and use, high use requirements, and complex desulfurizing agent components, and achieve good removal effects, not easy to malfunction, and easy to handle and meet the standards.

Inactive Publication Date: 2016-07-06
TIANJIN BINHUAN CHEM ENG TECH RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The desulfurizers of the above patents have complex components and high requirements for use, and are not suitable for large-scale promotion and use.

Method used

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  • Efficient flue gas desulfurization and denitrification method and materials adopted by same
  • Efficient flue gas desulfurization and denitrification method and materials adopted by same
  • Efficient flue gas desulfurization and denitrification method and materials adopted by same

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Effect test

preparation example Construction

[0042] The preparation method of above-mentioned material is as follows:

[0043] (1) Mix the above materials evenly, add 50-100% water of the powder type, stir and mix evenly;

[0044] ⑵Put the above water-added mixture into the kneader for 30-60min to disperse and knead evenly;

[0045] (3) After the mixed materials are kneaded, they are added to the extruder for extruding;

[0046] ⑷After extruding, drying and forming, rods or granules with a diameter of 0.5-1.5cm.

[0047] ⑸ In the above method, ⑶ and ⑷ or use the gas-solid reaction of simulated moving bed or fixed bed to make granular products with a particle size of about 0.5-1.5cm 3 .

[0048] The processing capacity of the above materials is 50-100mg / m3 , the flue gas throughput is 1000-3000m 3 / h.

Embodiment 1

[0050] A high-efficiency desulfurization and denitrification material, the composition and percentage content are as follows:

[0051] Main material: 95wt% calcium hydroxide (or calcium carbonate)

[0052] Auxiliary material: 5wt% sodium hypochlorite

[0053] The preparation method of above-mentioned material is as follows:

[0054] (1) Mix the above materials evenly, add 50% water of the powder type, stir and mix evenly;

[0055] (2) Add the above water-added mixture into the kneader for 50 minutes to disperse and knead evenly;

[0056] (3) After the mixed materials are kneaded, they are added to the extruder for extruding;

[0057] ⑷After extruding, drying and forming, rods or granules with a diameter of 0.5-1.5cm.

[0058] The processing capacity of the above materials is 60mg / m 3 , the flue gas throughput is 3000m 3 / h.

Embodiment 2

[0060] A high-efficiency desulfurization and denitrification material, the composition and percentage content are as follows:

[0061] Main material: 85wt% magnesium hydroxide or magnesium carbonate

[0062] Auxiliary material: 4wt% potassium permanganate

[0063] Binder: 6wt% aluminum sol

[0064] Diatomaceous earth or kaolin 5%

[0065] The preparation method of above-mentioned material is as follows:

[0066] (1) Mix the above materials evenly, add 80% water of the powder type, stir and mix evenly;

[0067] (2) Add the above water-added mixture into the kneader for 60 minutes to disperse and knead evenly;

[0068] (3) After the mixed materials are kneaded, they are added to the extruder for extruding;

[0069] ⑷After extruding, drying and forming, rods or granules with a diameter of 0.5-1.5cm.

[0070] The processing capacity of the above materials is 65mg / m 3 , the flue gas throughput is 2900m 3 / h.

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Abstract

The invention relates to a method for highly efficient desulfurization and denitrification of flue gas and materials used. The main material is at least one of 50-99wt% calcium hydroxide, calcium carbonate, magnesium hydroxide, magnesium carbonate, sodium carbonate or sodium bicarbonate, Auxiliary material oxidizing agent: 1-50wt%. 0.1-10wt% binder can also be added. The desulfurization principle of the high-efficiency desulfurization and denitrification material provided by the invention is to oxidize sulfur dioxide into sulfur trioxide and then perform desulfurization reaction to generate calcium sulfate or other sulfate radical compounds. The compound no longer needs secondary treatment and is harmless to the environment, so The method can fundamentally eliminate the discharge of subsequent pollutants from flue gas desulfurization, and is environmentally friendly.

Description

technical field [0001] The invention relates to the field of desulfurization, in particular to a method for highly efficient desulfurization and denitrification of flue gas and materials used. Background technique [0002] Commonly used wet desulfurization methods such as limestone-gypsum desulfurization in thermal power plants, sodium hydroxide-lime slurry (or magnesium hydroxide) and other methods are complicated in equipment, high in energy consumption in operation, waste water needs to be treated, and cause other secondary Pollution is more troublesome, and it may be difficult to meet the standard for flue gas desulfurization treatment of industrial boilers, kilns, and coking ovens. There is also a method of spraying calcium carbonate to the circulating fluidized bed boiler to remove sulfur (dry desulfurization in the usual sense), but the treatment effect of this method is poor. [0003] The traditional wet lime slurry (using sodium hydroxide + lime double alkali metho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/81B01D53/50B01D53/56
CPCB01D53/508B01D53/565B01D2258/0283
Inventor 罗坚
Owner TIANJIN BINHUAN CHEM ENG TECH RES INST
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