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Desulfurization agent

A desulfurizer, calcium phosphate technology, applied in the separation of dispersed particles, chemical instruments and methods, separation methods, etc., can solve the problems of low solubility of limestone, affecting desulfurization efficiency, low desulfurization efficiency, etc., to achieve the best desulfurization effect and flexible control , the effect of high desulfurization efficiency

Inactive Publication Date: 2013-05-08
SNTO TECH GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, limestone has low solubility and slow dissolution rate, which affects desulfurization efficiency; coupled with the poor quality of coal-fired coal, especially in the case of high sulfur content and large fluctuations in coal-fired coal, the desulfurization system is often operating under abnormal conditions, desulfurization low efficiency

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The percentage by weight of each composition of organic calcium carboxylate and calcium phosphate composition in the desulfurizer is as follows:

[0029] (Total weight is 1000Kg)

[0030]

[0031] The preparation method of desulfurizer is as follows:

[0032] Mix the components of the desulfurizer uniformly according to the above proportions.

[0033] During the desulfurization process, dissolve the desulfurizer in water, stir evenly, start the pump, and inject the solution containing the desulfurizer into the absorption tower to absorb SO in the flue gas 2 . The dosage and concentration of desulfurizer are based on the SO in the flue gas 2 The concentration and the desulfurization effect to be achieved are calculated.

[0034] After testing, the SO in the flue gas at the inlet of the absorption tower 2 The concentration is 1584mg / Nm 3 When using the desulfurizer of the above formula, the SO in the outlet flue gas 2 The concentration is 70mg / Nm 3 , the desulf...

Embodiment 2

[0036] The percentage by weight of each composition of organic calcium carboxylate and calcium phosphate composition in the desulfurizer is as follows:

[0037] (Total weight is 1000Kg)

[0038]

[0039] The particle size of the above-mentioned desulfurizer is ≤75 μm, the particle size is small, and the dissolution rate is fast.

[0040] After testing, the SO in the flue gas at the inlet of the absorption tower 2 The concentration is 1700mg / Nm 3 When using the desulfurizer of the above formula, the SO in the outlet flue gas 2 The concentration is 68mg / Nm 3 , the desulfurization rate is 96%. In this test, the liquid-gas ratio was 9.9, and the calcium-sulfur ratio was 1.01.

Embodiment 3

[0042] The percentage by weight of each composition of organic calcium carboxylate and calcium phosphate composition in the desulfurizer is as follows:

[0043] (Total weight is 1000Kg)

[0044]

[0045] The particle size of the above-mentioned desulfurizing agent is ≤65 μm, the particle size is small, and the dissolution rate is fast.

[0046] After testing, the SO in the flue gas at the inlet of the absorption tower 2 The concentration is 2000mg / Nm 3 When using the desulfurizer of the above formula, the SO in the outlet flue gas 2 The concentration is 100mg / Nm 3 , the desulfurization rate is 97.2%. In this test, the liquid-gas ratio was 10, and the calcium-sulfur ratio was 1.03.

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PUM

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Abstract

The invention discloses a desulfurization agent, which comprises organic calcium carboxylates and calcium phosphate, and concretely comprises the following components, by mass, 15-20% of calcium formate, 10-16% of EDTA calcium disodium, 10-16% of calcium lactate, 0-10% of calcium phytate, 25-30% of calcium citrate, 0-10% of calcium gluconate, 10-20% of calcium oxalate, and 1-10% of calcium phosphate. According to the desulfurization agent, combination of the organic calcium carboxylates and the calcium phosphate is adopted, solubility in the solution is high, calcium ions can be ionized quickly, a desulfurization reaction speed is rapid, and desulfurization efficiency is high.

Description

technical field [0001] The invention relates to a wet desulfurization process, in particular to a desulfurizer. Background technique [0002] In the traditional wet desulfurization process, the limestone-gypsum desulfurization method is mainly used. Its working principle is to use limestone or limestone slurry as an absorbent to absorb SO in the flue gas. 2 , to generate calcium sulfite, which is oxidized by compressed air in the oxidation tower to calcium sulfate, that is, gypsum. The traditional limestone-gypsum desulfurization method is mature and widely used. [0003] However, the low solubility and slow dissolution rate of limestone affect the desulfurization efficiency; coupled with the poor quality of coal-fired coal, especially in the case of high sulfur content and large fluctuations in coal-fired coal, the desulfurization system is often operating under abnormal conditions, desulfurization low efficiency. Contents of the invention [0004] The object of the pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/78B01D53/50
Inventor 李启云
Owner SNTO TECH GRP
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