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Flue gas desulfurization additive

A technology of additives and flue gas, applied in the separation of dispersed particles, chemical instruments and methods, separation methods, etc., can solve the problems of lack of activity of limestone desulfurizer, difficulty in achieving high-efficiency desulfurization, and large denaturation range, so as to shorten the desulfurization reaction time, Effects of reducing the amount of residue and reducing operating costs

Active Publication Date: 2012-10-31
洛阳万山高新技术应用工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the desulfurization agent limestone used has no in-depth and detailed analysis and testing of its chemical composition, mineral composition, ore formation age, and structural and structural characteristics, resulting in the lack of activity of the limestone desulfurization agent, low desulfurization efficiency and large denaturation, which is difficult to achieve. Efficient desulfurization

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Get 22% sodium carbonate, 20% aluminum sulfate, 14% ferric oxide, 19% aluminum oxide, 5% sodium carboxymethyl cellulose, 16% silicon dioxide micropowder and 4% sodium polyacrylate constitutes the flue gas desulfurization additive, and the particle size of the silicon dioxide micropowder is 2 μm.

[0012] After testing, when the coal-fired boilers in thermal power plants are fully fired with high-sulfur coal and the power generation is at full load, low-sulfur coal is not burned, coal blending is not required, and the desulfurization tower SO 2 The inlet concentration is 8000mg / Nm 3 -12000 mg / Nm 3 . Under the condition that the amount of slurry supplied to the desulfurization tower is constant, after using the flue gas desulfurization additive of the present invention, the desulfurization tower SO 2 The outlet concentration is from 1600mg / Nm 3 —1800mg / Nm 3 down to 280mg / Nm 3 within.

Embodiment 2

[0014] Get 24% sodium carbonate, 22% aluminum sulfate, 12% ferric oxide, 17% aluminum oxide, 6% sodium carboxymethyl cellulose, 14% silicon dioxide micropowder and 5% sodium polyacrylate constitutes the flue gas desulfurization additive, and the particle size of the silicon dioxide micropowder is 4 μm.

[0015] After testing, when the coal-fired boilers in thermal power plants are fully fired with high-sulfur coal and the power generation is at full load, low-sulfur coal is not burned, coal blending is not required, and the desulfurization tower SO 2 The inlet concentration is 8000mg / Nm 3 -12000 mg / Nm 3 . Under the condition that the amount of slurry supplied to the desulfurization tower is constant, after using the flue gas desulfurization additive of the present invention, the desulfurization tower SO 2 The outlet concentration is from 1600mg / Nm 3 —1800mg / Nm 3 down to 200mg / Nm 3 within.

Embodiment 3

[0017] Get 26% sodium carbonate, 19% aluminum sulfate, 17% ferric oxide, 16% aluminum oxide, 4% sodium carboxymethyl cellulose, 15% silicon dioxide micropowder and 3% sodium polyacrylate constitutes the flue gas desulfurization additive, and the particle size of the silica micropowder is 5 μm.

[0018] After testing, when the coal-fired boilers in thermal power plants are fully fired with high-sulfur coal and the power generation is at full load, low-sulfur coal is not burned, coal blending is not required, and the desulfurization tower SO 2 The inlet concentration is 8000mg / Nm 3 -12000 mg / Nm 3 . Under the condition that the amount of slurry supplied to the desulfurization tower is constant, after using the flue gas desulfurization additive of the present invention, the desulfurization tower SO 2 The outlet concentration is from 1600mg / Nm 3 —1800mg / Nm 3 down to 240mg / Nm 3 within.

[0019] It can be seen that the desulfurization additive made according to the components...

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Abstract

The invention discloses a flue gas desulfurization additive, and relates to a desulfurization additive added into a wet desulfurization absorbent. The desulfurization additive consists of the following components in percentage by weight: 22 to 26 percent of sodium carbonate, 19 to 22 percent of aluminum sulfate, 12 to 17 percent of ferric oxide, 16 to 19 percent of aluminum oxide, 4 to 6 percent of sodium carboxymethylcellulose, 14 to 16 percent of silicon dioxide micropowder, and 3 to 5 percent of sodium polyacrylate. The desulfurization additive is favorable for dissolution of gas and generation of solid products in a limestone desulfurization reaction, has reaction catalysis effect at the same time, and increases the reaction activity of limestone by over 50 percent; and the desulfurization additive improves the desulfurization rate of a wet desulfurization process, shortens the time of the desulfurization reaction, improves the desulfurization efficiency by over 20-25 percent, reduces the consumption of the limestone, reduces residue amount, and lowers operation cost.

Description

technical field [0001] The invention relates to a desulfurization additive added to a wet desulfurization absorbent, in particular to a flue gas desulfurization additive added to limestone slurry in a desulfurization tower. Background technique [0002] Environmental protection is increasingly concerned by the world. my country SO 2 The amount of annual emissions is large, and acid rain has covered about 40% of the country's land area. How to reduce and control SO 2 pollution has become particularly urgent and important. Since my country's energy structure is dominated by coal, most of which are used for combustion, it is necessary to reduce and control SO 2 pollution, it is necessary to try to reduce the SO in the process of coal combustion 2 emissions. However, due to the lack and non-renewability of coal resources, high-sulfur coal is still an important resource that cannot be abandoned. High-sulfur coal can be washed to remove most of the pyrite and ash, whi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/80B01D53/50
Inventor 曲万山任秀琴曲清亮曲青青
Owner 洛阳万山高新技术应用工程有限公司
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