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Flue gas desulfurization and denitrification method

A technology for desulfurization, denitrification, and flue gas, which is applied in the field of desulfurization, can solve the problems that are not suitable for large-scale promotion and use, complex components of desulfurization agents, and high requirements for use, and achieve good removal effect, easy to handle and meet the standards, and not easy to break down.

Inactive Publication Date: 2016-07-20
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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  • Flue gas desulfurization and denitrification method
  • Flue gas desulfurization and denitrification method
  • Flue gas desulfurization and denitrification method

Examples

Experimental program
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Effect test

preparation example Construction

[0036] The preparation method of above-mentioned material is as follows:

[0037] (1) Mix the above materials evenly, add 50-100% water of the powder type, stir and mix evenly;

[0038] ⑵Put the above water-added mixture into the kneader for 30-60min to disperse and knead evenly;

[0039] (3) After the mixed materials are kneaded, they are added to the extruder for extruding;

[0040] ⑷After extruding, drying and forming, rods or granules with a diameter of 0.5-1.5cm.

[0041] 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 .

[0042] The processing capacity of the above materials is 50-100mg / m 3 , the flue gas throughput is 1000-3000m 3 / h.

Embodiment 1

[0044] A high-efficiency desulfurization and denitrification material, the composition and percentage content are as follows:

[0045] Main material: 89wt% magnesium hydroxide or magnesium carbonate

[0046] Binder: 6wt% aluminum sol

[0047] Diatomaceous earth or kaolin 5%

[0048] The preparation method of above-mentioned material is as follows:

[0049] (1) Mix the above materials evenly, add 80% water of the powder type, stir and mix evenly;

[0050] (2) Add the above water-added mixture into the kneader for 60 minutes to disperse and knead evenly;

[0051] (3) After the mixed materials are kneaded, they are added to the extruder for extruding;

[0052] ⑷After extruding, drying and forming, rods or granules with a diameter of 0.5-1.5cm.

[0053] The processing capacity of the above materials is 65mg / m 3 , the flue gas throughput is 2900m 3 / h.

Embodiment 3

[0055] A high-efficiency desulfurization and denitrification material, the composition and percentage content are as follows:

[0056] Main material: 91wt% sodium bicarbonate

[0057] Binder: 8wt% aluminum sol

[0058] Ceria: 1%

[0059] The preparation method of above-mentioned material is as follows:

[0060] (1) Mix the above materials evenly, add 80% water of the powder type, stir and mix evenly;

[0061] (2) Add the above water-added mixture into the kneader for 60 minutes to disperse and knead evenly;

[0062] (3) After the mixed materials are kneaded, they are added to the extruder for extruding;

[0063] ⑷After extruding, drying and forming, rods or granules with a diameter of 0.5-1.5cm.

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Abstract

The invention relates to an efficient desulfurization and denitrification material, comprising at least one of calcium hydroxide, calcium carbonate, magnesium hydroxide, magnesium carbonate and sodium carbonate or sodium bicarbonate. A binder that is 0.1-10% by weight is added, diatomite or kaolin that is 5-10% of total weight of materials is added, and cerium dioxide that is 0.2-1% of the total weight of the materials is added. The desulfurization principle of the efficient desulfurization and denitrification material provided herein refers to oxidizing sulfur dioxide into sulfur trioxide and carrying out desulfurization reaction to generate calcium sulfate or other sulfate compounds, these compounds require no secondary treatment, and no environment damage is caused; therefore, this method enables the emission of subsequent pollutants from flue gas desulfurization to be substantially avoided and is environment-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 if it is directly transferred to the coking furnace for flue gas desulfurization treatment. 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 ...

Claims

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Application Information

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IPC IPC(8): B01D53/81B01D53/60B01J20/14B01J20/12B01J20/30
CPCB01D53/81B01D53/60B01D2251/304B01D2251/402B01D2251/404B01J20/041B01J20/043B01J20/06B01J20/12B01J20/14B01J2220/42B01J2220/4806
Inventor 罗坚
Owner TIANJIN BINHUAN CHEM ENG TECH RES INST
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