Additive for strengthening wet flue gas desulfurization technology

A technology of wet flue gas desulfurization and additives, applied in the direction of chemical instruments and methods, separation methods, calcium/strontium/barium sulfate, etc., can solve the problems of poor crystallization of desulfurized gypsum, desulfurization efficiency, system fouling, overflow, and Single and other problems, to achieve the effect of inhibiting system scaling, improving gypsum quality, and convenient dosing

Inactive Publication Date: 2012-07-18
SCI GREEN SHANDONG ENVIRONMENT TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, some of the existing additives have a single effect, and some will cause poor crystallization of desulfurization gypsum, and cannot simultaneously solve the problems of desulfurization efficiency decline, system fouling and overflow

Method used

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  • Additive for strengthening wet flue gas desulfurization technology
  • Additive for strengthening wet flue gas desulfurization technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Preparation of additives for enhanced wet flue gas desulfurization process:

[0035] Formula: Mixed organic acid 45%, sodium citrate 10%, surfactant 7%, manganese sulfate 3%, sodium hydroxymethyl cellulose carboxylate 35%.

[0036] The mixed organic acid consists of pure adipic acid and nylon acid; among them, the nylon acid contains the following components by mass percentage: succinic acid 26.19%, glutaric acid 59.62%, adipic acid 10.76%, water 1.57%, Impurity margin. The amount of pure adipic acid added should ensure that the mass percentage of adipic acid in the mixed organic acid is ≥50%.

[0037] The surfactant is composed of a fast penetrating agent and sodium dodecylbenzene sulfonate, and the mass ratio of the two is 1:1.

[0038] Buffer performance test: prepare adipic acid (a) with a concentration of 0.1mol / L (mass concentration of 14.6g / L), take the above-prepared additives and adjust them to weak acidity, and their mass concentration is 14.6g / L (b ), select the co...

Embodiment 2

[0042] Preparation of additives for enhanced wet flue gas desulfurization process:

[0043] Formula: Mixed organic acid 35%, sodium citrate 10%, surfactant 7%, manganese sulfate 3%, sodium hydroxymethyl cellulose carboxylate 45%.

[0044] The mixed organic acid consists of pure adipic acid and nylon acid; among them, the nylon acid contains the following components by mass percentage: succinic acid 26.19%, glutaric acid 59.62%, adipic acid 10.76%, water 1.57%, Impurity margin. The amount of pure adipic acid added should ensure that the mass percentage of adipic acid in the mixed organic acid is ≥50%.

[0045] The surfactant is composed of a fast penetrating agent and sodium dodecylbenzene sulfonate, and the mass ratio of the two is 1:1.

[0046] In a power plant desulfurization system that is using a certain brand of wet desulfurization additive, the additive prepared in Example 2 is used, 1000 ppm is added, and after a period of operation, the desulfurization efficiency reaches 93.5...

Embodiment 3

[0048] Preparation of additives for enhanced wet flue gas desulfurization process:

[0049] Formula: Mixed organic acid 40%, sodium citrate 10%, surfactant 7%, manganese sulfate 3%, sodium hydroxymethyl cellulose carboxylate 40%.

[0050] The mixed organic acid consists of pure adipic acid and nylon acid; among them, the nylon acid contains the following components by mass percentage: succinic acid 26.19%, glutaric acid 59.62%, adipic acid 10.76%, water 1.57%, Impurity margin. The amount of pure adipic acid added should ensure that the mass percentage of adipic acid in the mixed organic acid is ≥50%.

[0051] The surfactant is composed of a fast penetrating agent and sodium dodecylbenzene sulfonate, and the mass ratio of the two is 1:1.

[0052] In a power plant desulfurization system that is using a certain brand of wet desulfurization additive, the additive prepared in Example 3 was switched to 1000 ppm. After running for a period of time, the desulfurization efficiency reached 94%...

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Abstract

The invention belongs to the technical field of a limestone/gypsum wet flue gas desulfurization technology, and particularly relates to an additive for strengthening a wet flue gas desulfurization technology, which comprises the following components in percentage by mass: 35-45% of mixed organic acid, 5-10% of organic acid salt, 6-9% of surfactant, 1-6% of heavy metal salt and 35-45% of dirt dispersion agent; and the mixed organic acid comprises adipic acid, wherein the percentage of mass of the adipic acid in the mixed organic acid is not less than 50%. The additive can be added and used for strengthening the wet flue gas desulfurization technology, improve the desulfurization efficiency of a system, reduce the energy consumption, strengthen oxidization, improve the limestone quality and restrain system scaling, and accordingly, the purposes of energy conservation, consumption reduction and waste recycling are realized.

Description

Technical field [0001] The invention belongs to the technical field of limestone / gypsum wet flue gas desulfurization technology, and particularly relates to an additive for an enhanced wet flue gas desulfurization technology. Background technique [0002] The most commonly used method for power plant flue gas desulfurization is the limestone / gypsum wet flue gas desulfurization process, which is simple in process and low in cost. However, the pure limestone / gypsum wet flue gas desulfurization process has problems such as system scaling, corrosion, GGH blockage, and slurry overflow in the absorption tower during operation, and it is difficult to meet the instability of sulfur-containing coal, lower energy consumption, and high desulfurization efficiency. High quality requirements for by-product gypsum. [0003] In order to strengthen the desulfurization effect, prevent system fouling, improve gypsum quality, reduce energy consumption, and stabilize the system, the method of adding a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/80B01D53/50C01F11/46
Inventor 田民格刘含雷孙丰海
Owner SCI GREEN SHANDONG ENVIRONMENT TECH CO LTD
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