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

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
Comparison scheme
Effect test

Example Embodiment

[0036] The preparation method of the above materials is as follows:

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

[0038] (2) Add the above-mentioned water-added mixture into the kneader for 30-60min, and carry out uniform dispersion and kneading;

[0039] (3) After kneading the mixed material, add it to the extruder to extrude;

[0040] ⑷ Dry and shape after extrusion, rods or granules with a diameter of 0.5-1.5cm.

[0041] (5) In the above method (3) and (4), or adopt the gas-solid reaction of simulated moving bed or fixed bed to make granular products, the particle size is 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.

Example Embodiment

[0043] Example 1

[0044] An efficient desulfurization and denitration material, the composition and percentage 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 the above materials is as follows:

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

[0050] (2) Add the above-mentioned water-added mixture to the kneader for 60min, and carry out uniform dispersion and kneading;

[0051] (3) After kneading the mixed material, add it to the extruder to extrude;

[0052] ⑷ Dry and shape after extrusion, 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.

Example Embodiment

[0054] Example 3

[0055] An efficient desulfurization and denitration material, the composition and percentage are as follows:

[0056] Main material: 91wt% sodium bicarbonate

[0057] Binder: 8wt% aluminum sol

[0058] Cerium dioxide: 1%

[0059] The preparation method of the above materials is as follows:

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

[0061] (2) Add the above-mentioned water-added mixture to the kneader for 60min, and carry out uniform dispersion and kneading;

[0062] (3) After kneading the mixed material, add it to the extruder to extrude;

[0063] ⑷ Dry and shape after extrusion, 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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