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Synergistic limestone desulfuration absorbent

An absorbent and limestone technology, applied in the separation of dispersed particles, chemical instruments and methods, separation methods, etc., can solve the problems affecting the desulfurization effect, unstable coal sulfur content, limited solubility of limestone, etc., to alleviate the calcium scale of equipment , the effect of reducing energy consumption

Inactive Publication Date: 2013-03-13
XINJIANG XINHENGFA ENVIRONMENTAL PROTECTION SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, 90% of domestic power plants use FGD wet desulfurization technology, but due to the limited solubility of limestone and unstable coal sulfur content, the desulfurization system often exceeds the design value, which affects the desulfurization effect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A synergistic limestone desulfurization absorbent, consisting of the following components in parts by weight:

[0033] 90 parts of limestone, 6 parts of dolomite, 1 part of magnesium sulfate, 1 part of adipic acid, 2 parts of disodium adipate;

[0034] The content of calcium carbonate in the limestone is more than or equal to 93%;

[0035] The desulfurization absorbent is powdery white solid particles with a particle size of 325 mesh.

[0036] The preparation method is:

[0037] (1) Crush the above-mentioned limestone and dolomite to 2-3cm, mix them and add them to the Raymond mill through a belt conveyor;

[0038] (2) Mix the above-mentioned magnesium sulfate, adipic acid, and disodium adipate in the mixing tank in proportion, and then weigh the limestone and dolomite that are sent to the Raymond machine and step (1) through a belt conveyor weighing machine. Grinding stones together to a particle size of 325 mesh.

[0039] Tests have proved that the results of the ...

Embodiment 2

[0045] A synergistic limestone desulfurization absorbent, consisting of the following components in parts by weight:

[0046] 60 parts of limestone, 30 parts of dolomite, 6 parts of magnesium sulfate, 3 parts of citric acid, 4 parts of sodium citrate;

[0047] The content of calcium carbonate in the limestone is more than or equal to 93%;

[0048] The desulfurization absorbent is powdery white solid particles with a particle size of 400 mesh.

[0049] The preparation method is:

[0050] (1) Crush the above-mentioned limestone and dolomite to 2-3cm, mix them and add them to the Raymond mill through a belt conveyor;

[0051] (2) Mix the above-mentioned magnesium sulfate, citric acid, and sodium citrate in the mixing tank in proportion, then weigh them into the Raymond machine and powder them with the limestone and dolomite in step (1) Grind to a particle size of 400 mesh.

[0052] Tests have proved that the results of the desulfurization absorbent of the present embodiment a...

Embodiment 3

[0058] A synergistic limestone desulfurization absorbent, consisting of the following components in parts by weight:

[0059] 90 parts of limestone, 40 parts of dolomite, 10 parts of magnesium sulfate, 6 parts of succinic acid, 8 parts of sodium succinate;

[0060] The content of calcium carbonate in the limestone is more than or equal to 93%;

[0061] The desulfurization absorbent is powdery white solid particles with a particle size of 500 mesh.

[0062] The preparation method is the same as in Example 1.

[0063]Tests have proved that the results of the desulfurization absorbent of the present embodiment are as follows:

[0064] 1) Increase the desulfurization rate of FGD system by 8%;

[0065] 2) When the sulfur content of the coal used by the power plant exceeds the design value by 20%, the desulfurization rate can be maintained above 92%;

[0066] 3) Reduce the slurry circulation intensity by 26%, thereby reducing the energy consumption of the desulfurization system;...

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PUM

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Abstract

The invention discloses a synergistic limestone desulfuration absorbent. The synergistic limestone desulfuration absorbent comprises the following materials in parts by weight: 30-90 parts of limestone, 1-40 part(s) of dolomite, 1-10 part(s) of magnesium sulfate, 1-6 part(s) of organic polyatomic acid and 1-8 part(s) of organic polyatomic acid salt. The synergistic limestone desulfuration absorbent has the advantages that a desulfuration rate is improved, and when the content of coal sulfur components exceeds a design value by 20%, the desulfuration rate is above 90%; and the energy consumption of a desulfuration system is reduced, and the formation of equipment calcium scales in the desulfuration system is decelerated.

Description

[0001] technical field [0002] The invention relates to a desulfurization absorbent, in particular to a synergistic limestone desulfurization absorbent, which is applied to a wet flue gas desulfurization system of a power plant, that is, an FGD system, and belongs to the field of desulfurization absorbents. Background technique [0003] At present, 90% of domestic power plants use FGD wet desulfurization technology, but due to the limited solubility of limestone and unstable coal sulfur content, the desulfurization system often exceeds the design value, which affects the desulfurization effect. Contents of the invention [0004] In order to solve the above problems, the present invention designs a synergistic limestone desulfurization absorbent, which can maintain a desulfurization rate of more than 90% when the coal sulfur content exceeds the design value by 20%, ensuring the desulfurization effect. [0005] Technical scheme of the present invention is: [0006] A syner...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/80B01D53/50
Inventor 郑刚张淑萍陈武生韩亚荣卢静华
Owner XINJIANG XINHENGFA ENVIRONMENTAL PROTECTION SCI & TECH
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