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Additive for limestone-gypsum wet method flue gas desulphurization

A wet flue gas desulfurization and additive technology, which is applied in separation methods, chemical instruments and methods, and dispersed particle separation, etc., can solve the problems of long duration of action, slow onset time, and short duration, and achieves less usage. , The effect of promoting grain formation and improving crystallization performance

Inactive Publication Date: 2013-11-13
SNTO TECH GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the additives that can be used for limestone-gypsum wet desulfurization mainly include inorganic additives, organic additives and compound additives. The advantages of inorganic desulfurization additives are that they respond quickly and can quickly improve desulfurization efficiency. The disadvantage is that they last for a short time and are consumable additives; The advantage of organic desulfurization additives is that the duration of action is long, the additives are not directly consumed, and the dosage is small. The disadvantage is that the onset time is relatively slow, generally 2-5 hours; although the compound additives overcome the shortcomings of inorganic additives and organic additives, the formula Complicated, expensive, and used in large quantities

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] The components of the desulfurization additive and the weight percentage of each component are:

[0041] (Total weight is 100Kg)

[0042] Component

Adipic acid

Sodium carboxymethyl cellulose

Sodium carbonate

Aluminum sulfate

Ferric sulfate

Copper sulfate

Manganese sulfate

Weight (kg)

60

30

2

1

3

2

2

Weight percentage (%)

60

30

2

1

3

2

2

[0043] The method of using desulfurization additives is as follows:

[0044] a. The above-mentioned raw materials are compounded in proportion to form a finished product, and then added to the absorption tower. The initial addition amount is 0.6‰ of the weight of the limestone slurry;

[0045] b. After the desulfurization system has been running for a period of time, supplement it according to the loss of additives.

[0046] Apply the above desulfurization additives to the inlet flue gas SO 2 The design value of the concentration is 1584mg / Nm 3 In the desulfurization system, the inlet flue gas SO o...

Embodiment 2

[0048] The components of the desulfurization additive and the weight percentage of each component are:

[0049] (Total weight is 100Kg)

[0050] Component

Adipic acid

Sodium carboxymethyl cellulose

Sodium carbonate

Aluminum sulfate

Ferric sulfate

Manganese sulfate

Weight (kg)

30

50

10

5

2

3

Weight percentage (%)

30

50

10

5

2

3

[0051] The method of using desulfurization additives is as follows:

[0052] a. The above-mentioned raw materials are mixed in proportion to form a finished product, and then added to the absorption tower. The initial addition amount is 0.4‰ of the weight of the limestone slurry;

[0053] b. After the desulfurization system has been running for a period of time, supplement it according to the loss of additives.

[0054] Apply the above desulfurization additives to the inlet flue gas SO 2 The design value of the concentration is 1584mg / Nm 3 In the desulfurization system, the inlet flue gas SO of the desulfurization syste...

Embodiment 3

[0056] The components of the desulfurization additive and the weight percentage of each component are:

[0057] (Total weight is 100Kg)

[0058] Component

Adipic acid

Sodium carboxymethyl cellulose

Sodium carbonate

Aluminum sulfate

Ferric sulfate

Weight (kg)

40

35

12

10

3

Weight percentage (%)

40

35

12

10

3

[0059] The method of using desulfurization additives is as follows:

[0060] a. The above-mentioned raw materials are compounded in proportion to form a finished product, which is added to the absorption tower, and the initial addition amount is 0.5‰ of the weight of the limestone slurry;

[0061] b. After the desulfurization system has been running for a period of time, supplement it according to the loss of additives.

[0062] Apply the above desulfurization additives to the inlet flue gas SO 2 The design value of the concentration is 1584mg / Nm 3 In the desulfurization system, the inlet flue gas SO of the desulfurization system 2 The actual va...

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Abstract

The invention discloses an additive for limestone-gypsum wet method flue gas desulphurization. The desulphurization additive is characterized by comprising the following components by weight: 30-60% of adipic acid, 30-50% of carboxymethylcellulose sodium, 2-20% of sodium carbonate, 1-15% of pearl alum and 2-15% of a catalysis oxidizing agent; and the catalysis oxidizing agent is at least one selected from ferric sulfate, copper sulfate and manganese sulfate. Belonging to compound desulphurization additive, the flue gas desulphurization additive provided by the invention has simple formula and high desulphurization efficiency.

Description

Technical field [0001] The invention relates to a wet desulfurization process, in particular to a limestone-gypsum wet flue gas desulfurization additive. Background technique [0002] In the traditional wet desulfurization process, the limestone-gypsum desulfurization method is mainly used. Its working principle is to use limestone as an absorbent to absorb SO in the flue gas. 2 , Generate calcium sulfite, calcium sulfite is oxidized by air in the oxidation tower to calcium sulfate, namely gypsum. In the traditional limestone-gypsum desulfurization method, the cost of limestone as an absorbent is low, and the desulfurization by-products can be comprehensively utilized, so the desulfurization method is widely used. [0003] With the large-scale mining and use of coal resources, the quality of coal has gradually decreased, causing the sulfur content of the flue gas of power station pulverized coal boilers to gradually increase, far exceeding the design value of the sulfur content of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/79B01D53/50
Inventor 不公告发明人
Owner SNTO TECH GRP
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