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Layer burning furnace desulfurization and denitrification flue gas treatment technology

A flue gas treatment and denitrification technology, which is applied to the separation of dispersed particles, chemical instruments and methods, lighting and heating equipment, etc., can solve the problems of not many denitrification equipment, nitrogen oxide hazards, and lack of secondary combustion technology

Inactive Publication Date: 2014-06-18
张明鑫
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] 2. The hazards of nitrogen oxides
[0018] Since the country did not have strict regulations on denitrification before 2013, and only charged management according to the total emission, there are not many denitrification equipment in major power plants in China, and they are mainly concentrated in several key cities. No denitrification technology and other equipment are put into operation in the layer firing furnace

Method used

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  • Layer burning furnace desulfurization and denitrification flue gas treatment technology
  • Layer burning furnace desulfurization and denitrification flue gas treatment technology
  • Layer burning furnace desulfurization and denitrification flue gas treatment technology

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Experimental program
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Effect test

Embodiment 1

[0034] In the desulfurization and denitrification flue gas treatment process of the bed furnace, calcium carbonate is spread on the upper part of the coal seam in the new coal area of ​​the boiler, and the amount of calcium carbonate is 1% of the coal consumption in terms of mass percentage; Drying, preheating, burning, and burnout are several stages, converted into calcium oxide and calcium sulfate, calcium carbonate that has absorbed sulfur is converted into calcium sulfate, and the finer calcium sulfate produced by calcination is converted into calcium oxide and then blown by the fan Enter the desulfurization tower; what described calcium carbonate adopts is poultry egg skin. When adding 1%, the sulfur content was measured by 832mg / m in the experimental coal quality in this embodiment 3 Reduced to 360 mg / m 3 .

Embodiment 2

[0036] In the desulfurization and denitrification flue gas treatment process of the bed furnace, calcium carbonate is spread on the upper part of the coal seam in the volatile matter precipitation area of ​​the boiler, and the amount of calcium carbonate is 10% of the coal consumption in terms of mass percentage; After several stages of drying, preheating, burning, and burnout, it is converted into calcium oxide and calcium sulfate. The machine enters the desulfurization tower; during the combustion process, the amount of calcium carbonate added is gradually adjusted according to the sulfur content in the coal, the desulfurization effect, the output of the fan, and the characteristics of the coke residue of the coal. Simultaneously, the present embodiment adds sodium hydroxide in the desulfurization water tank, makes the pH value in the desulfurization water tank remain at 9; So that calcium oxide synthesizes sodium hydroxide and reacts with the sulfur in the flue gas again; Th...

Embodiment 3

[0038] The air supply volume of the existing layer fired boiler process is adjusted according to the boiler load. In the furnace the air comes into contact with the fuel, which completes the combustion process of the fuel and heats the furnace water. The flue gas produced after combustion is discharged from the boiler through the tail flue of the boiler, and enters the flue gas dust collector through the relevant flue, where the flue gas is preliminarily dedusted. The flue gas that has been preliminarily dedusted enters the induced draft fan through the flue and damper between the dust collector and the induced draft fan. After the induced draft fan is boosted, it enters the desulfurization tower through the flue between the induced draft fan and the desulfurization tower. In the desulfurization tower, after the flue gas is dedusted and desulfurized again, it is discharged into the flue gas general camp through the flue after the desulfurization tower, and finally discharged i...

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Abstract

The invention relates to a layer burning furnace desulfurization and denitrification flue gas treatment technology, belonging to the field of a layer burning furnace desulfurization and denitrification technology. The layer burning furnace desulfurization and denitrification flue gas treatment technology is characterized in that calcium carbonate is flatly laid at the upper part of the coal seam of a new coal area or a volatile matter precipitation area of a boiler; and the dosage of the calcium carbonate is 1-10wt% of coal consumption. The layer burning furnace desulfurization and denitrification flue gas treatment technology has the average combustion desulfurization efficiency of more than 85% and the denitrification rate of more than 50%.

Description

[0001] technical field [0002] The invention relates to a desulfurization and denitrification flue gas treatment process of a layered furnace, and belongs to the technical field of layered furnace desulfurization and denitrification. Background technique [0003] Currently, flue gas pollutants include sulfur oxides and nitrogen oxides. The specific hazards of the above two pollutants are as follows: [0004] 1. The hazards of sulfur oxides [0005] Sulfur oxides are very harmful to the human body, SO 2 The concentration reaches 0.04*10 -6 , the impact on human health is more obvious. Even die as a result. SO 2 Combined with water vapor in the air to form sulfuric acid vapor, if combined with soot, acid rain is formed. Acid rain has a great impact on plants, and the damage to various plants such as trees, shrubs, and grains is more serious than that to people or animals. [0006] 2. The hazards of nitrogen oxides [0007] NO and NO 2 It causes great harm to anima...

Claims

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Application Information

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IPC IPC(8): B01D53/75B01D53/60F23J15/04
Inventor 张明鑫
Owner 张明鑫