Flue gas desulfurization additive, and preparation method and application thereof

A technology of additives and flue gas, applied in separation methods, chemical instruments and methods, and separation of dispersed particles, can solve the problems of desulfurization equipment that is difficult to meet emission standards, high operating costs, and easy scaling of equipment, and shorten the desulfurization reaction. time, reduce operating costs, and slow down the effect of fouling rate

Inactive Publication Date: 2012-12-12
SHANGHAI UNIVERSITY OF ELECTRIC POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it also has the disadvantages of large initial investment, high operating costs and easy fouling of equipment.
With the gradual increase of sulfur content in the flue gas of pulverized coal boilers in power stations and the implementation of increasingly stringent environmental protection emission standards in 2012, it is difficult for some desulfurization equipment that has been put into operation to achieve increasing desulfurization efficiency even under its design desulfurization efficiency. strict SO 2 Emission Standards

Method used

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  • Flue gas desulfurization additive, and preparation method and application thereof
  • Flue gas desulfurization additive, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A flue gas desulfurization additive A, calculated by weight percentage, its composition and content are as follows:

[0028] Magnesium Compound 35%

[0029] Buffer 45%

[0030] Organic acid 10%

[0031] Sodium salt 5%;

[0032] The buffering agent is calculated by mass percentage of citric acid and sodium citrate, i.e. citric acid: sodium citrate is a mixture of 2.5:2;

[0033] Described magnesium compound is magnesium oxide;

[0034] Described organic acid is adipic acid;

[0035] Described sodium salt is sodium chlorate.

[0036] In the above-mentioned preparation method of the flue gas desulfurization additive A, the flue gas desulfurization additive A is obtained after mixing a magnesium compound, a buffer, an organic acid and a sodium salt and stirring evenly.

[0037] The above-mentioned flue gas desulfurization additive A is applied to the desulfurization equipment of Shanghai Waigaoqiao Power Plant No. 3, and the desulfurization conditio...

Embodiment 2

[0045] A flue gas desulfurization additive B, calculated by weight percentage, its composition and content are as follows:

[0046] Magnesium Compound 40%

[0047] Buffer 50%

[0048] Organic acid 5%

[0049] Sodium salt 5%;

[0050] The buffer is calculated by mass percentage of citric acid and sodium citrate, i.e. citric acid: sodium citrate is a mixture of 3:2;

[0051] Described magnesium compound is magnesium oxide;

[0052] Described organic acid is adipic acid;

[0053] Described sodium salt is sodium chloride.

[0054] In the above-mentioned preparation method of the flue gas desulfurization additive B, the flue gas desulfurization additive B is obtained by mixing the magnesium compound, the buffer, the organic acid and the sodium salt and stirring evenly.

[0055] In Shanghai Baosteel Power Plant, all coal-fired boilers burn high-sulfur coal, and when the power generation capacity is at full load, no low-sulfur coal is burned, no coal blen...

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Abstract

The invention discloses a flue gas desulfurization additive, and a preparation method and application thereof. The flue gas desulfurization additive is prepared from the following components in percentage by weight: 35-40% of magnesium compound, 45-50% of buffer, 5-10% of organic acid and 1-5% of sodium salt. The preparation method is implemented by uniformly stirring and mixing the magnesium compound, buffer, organic acid and sodium salt to obtain the flue gas desulfurization additive. When being used in wet-process flue gas desulfurization, the flue gas desulfurization additive can effectively promote the absorption of SO2 and dissolution of CaCO3, thereby enhancing the limestone utilization ratio by 13-15%, shortening the desulfurization reaction time and enhancing the desulfurization rate by 4-10%. The application of the flue gas desulfurization additive enhances the desulfurization efficiency and the utilization ratio of the desulfurizer, thereby lowering the operating cost of flue gas desulfurization; and meanwhile, the invention can reduce the calcium scaling rate, thereby enhancing the system reliability.

Description

technical field [0001] The invention relates to a desulfurization additive added to a wet flue gas desulfurization absorbent, in particular to a flue gas desulfurization additive added to limestone slurry in a desulfurization tower, a preparation method thereof and a wet flue gas desulfurization additive Applications. Background technique [0002] Among many flue gas desulfurization technologies, wet flue gas desulfurization has been the most widely used as a relatively mature desulfurization technology with high desulfurization efficiency. However, it also has the disadvantages of large initial investment, high operating costs and easy fouling of equipment. With the gradual increase of sulfur content in the flue gas of pulverized coal boilers in power stations and the implementation of increasingly stringent environmental protection emission standards in 2012, it is difficult for some desulfurization equipment that has been put into operation to achieve increasing desulf...

Claims

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Application Information

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IPC IPC(8): B01D53/80B01D53/50
Inventor 徐宏建王书芳潘卫国李浩然郭瑞堂周曰杨玲
Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER
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