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Sodium-based desulfurization and denitration absorbent and preparation method thereof

A desulfurization, denitrification, and absorbent technology, applied in the field of flue gas purification, can solve the problems of secondary pollution, difficult industrial application, pollution transfer, etc., and achieve the effect of reducing investment cost, meeting emission requirements, and moderate cost

Inactive Publication Date: 2017-06-27
湖南云平环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] 1. The development of integrated desulfurization and denitrification technology is slow, mainly due to the impact of absorbents on SO 2 As well as the absorption rate of nitrogen oxides, it cannot solve the problem of simultaneous treatment of two types of pollutants SO 2 High efficiency absorption with nitrogen oxides;
[0008] 2. The high cost of desulfurization and denitrification absorbent makes it difficult to apply industrially;
[0009] 3. Absorbent to SO 2 The comprehensive utilization of products generated after absorption with nitrogen oxides may easily cause secondary pollution or pollution transfer

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The components of sodium-based desulfurization and denitrification absorbent include:

[0033] Mass concentration is the ammoniacal liquor of 4% and the sodium base mixed solution that is dissolved in described ammoniacal liquor;

[0034] Wherein the sodium-based mixed solution comprises the following components:

[0035] Na with a molar concentration of 3mmol / L 2 CO 3 , the molar concentration is 4mmol / L NaClO, the molar concentration is 2mmol / L NaClO 2 ;

[0036] By controlling the addition of ammonia water, the pH value of the mixed solution is 12-14, that is, the sodium-based desulfurization and denitrification absorbent is formed.

[0037] The preparation method of the sodium-based desulfurization and denitrification absorbent comprises the following steps:

[0038] Step S1: Prepare sodium-based complex solution

[0039] Na with a molar concentration of 3mmol / L 2 CO 3 , NaClO with a molar concentration of 4mmol / L, and NaClO with a molar concentration of 2mm...

Embodiment 2

[0047] The components of sodium-based desulfurization and denitrification absorbent include:

[0048] A mass concentration of 2% ammonia and a sodium-based mixed solution dissolved in the ammonia;

[0049] Wherein the sodium-based mixed solution comprises the following components:

[0050] Na with a molar concentration of 4mmol / L 2 CO 3 , the molar concentration is 6mmol / L NaClO, the molar concentration is 1mmol / L NaClO 2 ;

[0051] By controlling the addition of ammonia water, the pH value of the mixed solution is 12-14, that is, the sodium-based desulfurization and denitrification absorbent is formed.

[0052] The preparation method of the sodium-based desulfurization and denitrification absorbent refers to Example 1, which will not be repeated here.

[0053] The sodium-based desulfurization and denitrification absorbent was applied to the spray tower for simultaneous desulfurization and denitrification test of the liquid-phase composite liquid. The design system of the...

Embodiment 3

[0056] The components of sodium-based desulfurization and denitrification absorbent include:

[0057] A mass concentration of 5% ammonia and a sodium-based mixed solution dissolved in the ammonia;

[0058] Wherein the sodium-based mixed solution comprises the following components:

[0059] Na with a molar concentration of 2mmol / L 2 CO 3 , the molar concentration is 5mmol / L NaClO, the molar concentration is 3mmol / L NaClO 2 ;

[0060] By controlling the addition of ammonia water, the pH value of the mixed solution is 12-14, that is, the sodium-based desulfurization and denitrification absorbent is formed.

[0061] The preparation method of the sodium-based desulfurization and denitrification absorbent refers to Example 1, which will not be repeated here.

[0062] The sodium-based desulfurization and denitrification absorbent was applied to the spray tower for simultaneous desulfurization and denitrification test of the liquid-phase composite liquid. The design system of the t...

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PUM

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Abstract

The invention discloses a sodium-based desulfurization and denitration absorbent. The sodium-based desulfurization and denitration absorbent contains ammonia water having the mass concentration of 2-5% and a sodium-based composite solution soluble in the ammonia water, wherein the sodium-based composite solution is prepared from Na2CO3 having the molar concentration of 2-4 mmol / L, NaClO having the molar concentration of 3-6 mmpol / L and NaClO2 having the molar concentration of 1-3 mmol / L, and the pH of the sodium-based desulfurization denitration absorbent is 12-14. The sodium-based desulfurization and denitration absorbent has high efficiency and low investment cost. The invention further provides a method for preparing the sodium-based desulfurization and denitration absorbent.

Description

[0001] 【Technical field】 [0002] The invention relates to the field of flue gas purification, and specifically designs a sodium-based desulfurization and denitrification absorbent and a preparation method thereof. [0003] 【Background technique】 [0004] Air pollution is one of the most serious environmental problems facing the survival and development of human society. Among them, the pollution control of sulfur dioxide and nitrogen oxides in coal-fired flue gas is currently the most important task in the field of air pollution control. [0005] The concentrations of sulfur oxides and nitrogen oxides produced during the combustion of fuels containing S and N elements are not too high, but the total amount is very large. Dust removal, desulfurization, and denitrification in existing flue gas purification technologies at home and abroad are often completed in multiple independent systems, which not only covers a large area, but also has high investment and operating costs. Wit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/14B01D53/78B01D53/60
CPCB01D53/14B01D53/1456B01D53/1481B01D53/1493B01D53/60B01D53/78B01D2251/304B01D2252/102B01D2258/0283
Inventor 李启云
Owner 湖南云平环保科技有限公司