CN101199915A - Trace heavy metals absorbent of combustion flue gas - Google Patents
Trace heavy metals absorbent of combustion flue gas Download PDFInfo
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- CN101199915A CN101199915A CNA2007100128768A CN200710012876A CN101199915A CN 101199915 A CN101199915 A CN 101199915A CN A2007100128768 A CNA2007100128768 A CN A2007100128768A CN 200710012876 A CN200710012876 A CN 200710012876A CN 101199915 A CN101199915 A CN 101199915A
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- flue gas
- absorbent
- acetic acid
- edta
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Abstract
Disclosed is a trace-heavy-metal absorbent for the coal-burnt flue gas. The invention is composed of main material and auxiliary material, with the main material prepared with the following proportion by weight (g/L): EDTA-2Na of 37-110, acetic acid of 6-30, citric acid of 21-63 and tartaric acid of 15-75; with the auxiliary material prepared with the following proportion by weight (g/L): oxalic acid of 9-27, aminoacetic acid of 23-38 and malic acid of 13-67. the preparation method is that first acetic acid of required amount is dissolved in water; then citric acid, tartaric acid, oxalic acid, aminoacetic acid and malic acid are sequentially added; finally EDTA-2Na salt is added and the mixture is mixed until the complete dissolution. The invention mainly absorbs such heavy metals as Mg, Ca, Al, K, Pb, Ni, Fe, Zn, Co, Cd, Cr, Sn, Hg, Mn, As, Cu, Sb and Se in the coal-burnt flue gas. The invention which is low in cost and easy to get is a stable absorbent which can simultaneously absorb a plurality of heavy metals in the coal.
Description
Technical field: the present invention relates to a kind of heavy metals absorbent, particularly a kind ofly can make micro heavy absorbent in the coal combustion flue gas that the coal combustion heavy metals emission is effectively controlled, belong to the chemical products applied technical field.
Background technology: in the combustion gas that with the coal combustion is the energy, remove a large amount of CO
2In addition, also exist other gas, as SO
x, NO
x, P
2O
3Wait the multiple oxide of other nonmetalloid; The multiple complex of ammonia; Exist the oxide or the hydroxide of heavy metals such as the lower mercury of variform, particularly boiling point micro-or micro-multiple metal such as heavy metal, alkali metal, alkaline-earth metal, copper, chromium, cadmium.These heavy metal contaminants often granularity are little or exist with steam condition, are difficult to be captured and remove by existing cleaner, thereby cause pollution to atmosphere and environment.
Because people's environmental consciousness strengthens, research trace element emission and control become an emerging field in the Air.The inhibition of coal-fired heavy metal is divided into the preceding preliminary treatment of burning, combustion process improvement and three aspects of heavy metal form Transformation Application.In the improvement of coal-fired flue-gas heavy metals emission, some achievements have been obtained both at home and abroad, as the commercialization plasma reactor of the MGC plasma company of Switzerland Muttenz development, the flue gas condensing cleaning system that use in Europe, and add the discharging etc. that solid adsorbent is controlled heavy metal in the combustion process in the flue.The research present for liquid absorbent mainly rests on local techniques, as the exploitation of adsorbent and administer scheduling theory afterwards and experimental verification research on, it is single that existing absorbent absorbs the heavy metal kind, also do not enter pilot scale and production application stage, lacks breakthrough technological achievement.
Summary of the invention: the objective of the invention is at the deficiencies in the prior art, and put forth effort to solve because the composition of absorbent, the selection technical barrier bigger to assimilation effect, service life and cost impact of concentration, and provide a kind of cheap and easy to get, the stable absorption agent that various heavy in the coal is absorbed simultaneously.
The objective of the invention is to be achieved through the following technical solutions: micro heavy absorbent in the coal combustion flue gas, this absorbent is made up of major ingredient and auxiliary material, and major ingredient comprises following component:
Component molecular formula concentration mol/L addition (g/L)
EDTA-2Na C
10H
14N
2O
8Na
2·2H
2O 0.1～0.3 37～110；
Acetic acid CH
3COOH 0.1～0.5 6～30;
Citric acid C
6H
8O
7H
2O 0.1～0.3 21～63;
Tartaric acid H
2C
4H
4O
60.1～0.5 15～75.
Auxiliary material comprises following component:
Component molecular formula concentration mol/L addition (g/L)
Oxalic acid H
2C
2O
40.1～0.3 9～27;
Amion acetic acid C
2H
5NO
20.3～0.5 23～38;
Malic acid C
4H
6O
50.1～0.5 13～67.
The above-mentioned major ingredient of being made up of four kinds of components mainly absorbs Mg, Ca, Al, K, Pb, Ni, Fe, Zn, Co, Cd, Cr, Sn, 14 heavy metal species such as Hg, Mn in the coal combustion flue gas.
The above-mentioned auxiliary material of being made up of three kinds of components is except that above-mentioned metal is had certain auxiliary absorption, to selective absorptions of 4 heavy metal species such as As, Cu, Sb, Se.
The present invention can press the major ingredient preparation according to actual needs, also can major ingredient and supplementary product compatibility result of use is better.Effect of the present invention: coal combustion amount 16～18kg/h, flue gas flow 135m
3/ h, 38 ℃ of flue-gas temperatures, absorption liquid spray flux 90L/h, record smoke absorption respectively before, absorb the back amount of metal, difference divided by measure before absorbing absorptivity:
Element absorption rate (%) element absorption rate (%)
Mg 96.312 Ca 91.95
Al 98.84 K 90.28
Cu 69.50 Pb 83.85
Ni 78.35 Fe 97.24
Zn 82.96 Co 98.76
Cd 59.57 Cr 93.21
Sn 85.35 Sb 82.96
Hg 87.34 Mn 96.65
Se 81.54 As 98.83
The present invention has that raw material sources are extensive, the preparation method is simple, good absorbing effect and the characteristics that are easy to promote.
Description of drawings:
Fig. 1 uses workflow schematic diagram of the present invention.
With reference to Fig. 1, coal combustion produces the flue gas that smoke chamber 1 produces, the dedusting in Ventilator Room 2 After installing 3 dedustings, send into two phase flow chamber 6 by blower fan 4, enter spraying type absorption through electric heater 5 Tower 7, absorption tower 7 place in the absorption chamber 8, also are provided with in the absorption chamber 8 to absorb flow container 9, spray liquid Be stored in the absorption flow container 9, this absorption liquid is micro heavy absorbent of the present invention.
The specific embodiment:
Embodiment 1
Micro heavy absorbent in the coal combustion flue gas, this absorbent is made up of major ingredient and auxiliary material, and major ingredient and auxiliary material are prepared by following weight ratio (g/L): EDTA-2Na 37; Acetic acid 6; Citric acid 21; Tartaric acid 15; Oxalic acid 9; Amion acetic acid 23; Malic acid 13.
Compound method:
(1) calculates volume required each material addition.
(2) aequum acetic acid is dissolved in the water, add citric acid, tartaric acid, oxalic acid, amion acetic acid, malic acid more successively, add EDTA-2Na salt at last, be stirred to whole dissolvings.
Micro heavy absorbent in the coal combustion flue gas, this absorbent is made up of major ingredient and auxiliary material, and major ingredient and auxiliary material are prepared by following weight ratio (g/L): EDTA-2Na 110; Acetic acid 30; Citric acid 63; Tartaric acid 75; Oxalic acid 27; Amion acetic acid 38; Malic acid 67.
Compound method is identical with embodiment 1.
Micro heavy absorbent in the coal combustion flue gas, this absorbent is made up of major ingredient and auxiliary material, and major ingredient and auxiliary material are prepared by following weight ratio (g/L): EDTA-2Na 60; Acetic acid 12; Citric acid 42; Tartaric acid 45; Oxalic acid 18; Amion acetic acid 30; Malic acid 40.
Compound method is identical with embodiment 1.
Embodiment 4
Micro heavy absorbent in the coal combustion flue gas, this absorbent is made up of major ingredient and auxiliary material, and major ingredient and auxiliary material are by following weight ratio (g/L) preparation: EDTA-2Na90; Acetic acid 20; Citric acid 50; Tartaric acid 60; Oxalic acid 25; Amion acetic acid 25; Malic acid 30.
Compound method is identical with embodiment 1.
Claims (6)
1. micro heavy absorbent in the coal combustion flue gas, this absorbent is made up of major ingredient and auxiliary material, and major ingredient is by following weight ratio (g/L) preparation:
EDTA-2Na 37～110；
Acetic acid 6～30;
Citric acid 21～63;
Tartaric acid 15～75.
2. micro heavy absorbent in the coal combustion flue gas according to claim 1, described auxiliary material is prepared by following weight ratio (g/L):
Oxalic acid 9～27;
Amion acetic acid 23～38;
Malic acid 13～67.
3. according to micro heavy absorbent in claim 1 and the 2 described coal combustion flue gas, the concrete consumption of its each component is prepared by following weight ratio (g/L): EDTA-2Na 37; Acetic acid 6; Citric acid 21; Tartaric acid 15; Oxalic acid 9; Amion acetic acid 23; Malic acid 13.
4. according to micro heavy absorbent in claim 1 and the 2 described coal combustion flue gas, the concrete consumption of its each component is prepared by following weight ratio (g/L): EDTA-2Na 110; Acetic acid 30; Citric acid 63; Tartaric acid 75; Oxalic acid 27; Amion acetic acid 38; Malic acid 67.
5. according to micro heavy absorbent in claim 1 and the 2 described coal combustion flue gas, the concrete consumption of its each component is prepared by following weight ratio (g/L): EDTA-2Na 60; Acetic acid 12; Citric acid 42; Tartaric acid 45; Oxalic acid 18; Amion acetic acid 30; Malic acid 40.
6. according to micro heavy absorbent in claim 1 and the 2 described coal combustion flue gas, the concrete consumption of its each component is prepared by following weight ratio (g/L): EDTA-2Na 90; Acetic acid 20; Citric acid 50; Tartaric acid 60; Oxalic acid 25; Amion acetic acid 25; Malic acid 30.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100128768A CN100515544C (en) | 2007-09-19 | 2007-09-19 | Trace heavy metals absorbent of combustion flue gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100128768A CN100515544C (en) | 2007-09-19 | 2007-09-19 | Trace heavy metals absorbent of combustion flue gas |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101199915A true CN101199915A (en) | 2008-06-18 |
| CN100515544C CN100515544C (en) | 2009-07-22 |
Family
ID=39515389
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007100128768A Expired - Fee Related CN100515544C (en) | 2007-09-19 | 2007-09-19 | Trace heavy metals absorbent of combustion flue gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100515544C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102188883A (en) * | 2011-04-12 | 2011-09-21 | 王晓晔 | Novel smoke purification process and device capable of integrally desulphurizing, denitrifying and removing heavy metals |
| CN102275982A (en) * | 2011-06-07 | 2011-12-14 | 沈阳化工大学 | Mixed solvent for dissolving lead sulfate |
-
2007
- 2007-09-19 CN CNB2007100128768A patent/CN100515544C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102188883A (en) * | 2011-04-12 | 2011-09-21 | 王晓晔 | Novel smoke purification process and device capable of integrally desulphurizing, denitrifying and removing heavy metals |
| CN102275982A (en) * | 2011-06-07 | 2011-12-14 | 沈阳化工大学 | Mixed solvent for dissolving lead sulfate |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100515544C (en) | 2009-07-22 |
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Granted publication date: 20090722 Termination date: 20100919 |