CN109316943A - A method of Desulfurization synergist is made using lime stone - Google Patents
A method of Desulfurization synergist is made using lime stone Download PDFInfo
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- CN109316943A CN109316943A CN201811354895.3A CN201811354895A CN109316943A CN 109316943 A CN109316943 A CN 109316943A CN 201811354895 A CN201811354895 A CN 201811354895A CN 109316943 A CN109316943 A CN 109316943A
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- parts
- lime stone
- acid
- desulfurization
- organic multicomponent
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/80—Semi-solid phase processes, i.e. by using slurries
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
- B01D53/501—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
- B01D53/502—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound characterised by a specific solution or suspension
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/40—Alkaline earth metal or magnesium compounds
- B01D2251/402—Alkaline earth metal or magnesium compounds of magnesium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/40—Alkaline earth metal or magnesium compounds
- B01D2251/404—Alkaline earth metal or magnesium compounds of calcium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
Abstract
The invention discloses a kind of methods using lime stone production Desulfurization synergist, are respectively the material composition of 30-90 parts of lime stone, 5-45 parts of dolomite, 5-15 parts of magnesium sulfate, 5-10 parts of organic multicomponent acid, 1-8 parts of organic multicomponent hydrochlorate by parts by weight；The present invention has the advantages that improving desulfurization degree, when coal sulfur exceeds design value 20%, it is able to maintain 90% or more desulfurization degree, reduces the energy consumption of desulphurization system, alleviates the formation of equipment calcium scale in desulphurization system.
Description
Technical field
The present invention relates to a kind of Desulfurization synergist, specifically a kind of Synergistic limestone desulfuration synergist is applied to
The wet method fume desulfurizing system of power plant, that is, FGD system, belongs to Desulfurization synergist field.
Background technique
The power plant of the country 90% all uses FGD Wet Flue Gas Desulfurization Technique at present, but since lime stone dissolubility is limited, coal quality
Sulfur is unstable, and desulphurization system often has the case where beyond design value, to affect desulfurization effect.
Summary of the invention
To solve the above-mentioned problems, the present invention devises a kind of Synergistic limestone desulfuration synergist, exceeds in coal sulfur
When design value 20%, which is able to maintain 90% or more desulfurization degree, ensure that desulfurization effect.
The technical solution of the present invention is as follows:
A kind of Synergistic limestone desulfuration synergist, the Desulfurization synergist is by following material composition:
Lime stone, dolomite, magnesium sulfate, organic multicomponent acid and organic multicomponent hydrochlorate；
The parts by weight of above-mentioned each substance are respectively as follows:
30-90 parts of lime stone, 1-40 parts of dolomite, 1-10 parts of magnesium sulfate, 1-6 parts of organic multicomponent acid, organic multicomponent hydrochlorate
1-8 parts；
Preferably, 50 parts of lime stone, 35 parts of dolomite, 10 parts of magnesium sulfate, 5 parts of succinic acid, 5 parts of sodium succinate；
Wherein, the organic multicomponent acid is one of citric acid, adipic acid, succinic acid；
The organic multicomponent hydrochlorate is one of sodium citrate, adipic acid disodium, sodium succinate；
Content >=93% of calcium carbonate in the lime stone；
The Desulfurization synergist is powdery white solia particle, granularity >=350 mesh.
The lime stone is main additive, ultimately forms by-product by dissolution, oxidation, crystallization in sweetening process
CaSO4 removes the SO2 in flue gas with this.In the dolomite about containing 50% CaO, 50% MgO.Wherein CaO and lime
For masonry with identical, MgO is alkaline matter, strengthens the alkalinity of solution in water and provides the Mg2+ of a fixed number two, is in slurries
Ca2+ provides better environment with reacting for SO32+, promotes the positive of absorbing reaction to carry out, so that reaction rate be turned up；Separately
Outside, MgO improves the reaction condition of lime stone mass transfer reaction, enhances dispersibility and activity of the milk of lime in desulphurization reaction
Property, thus reduce siltation, play the role of scale inhibition anticorrosion.
The Mg2+ generated after the magnesium sulfate addition through dissociation, can be combined into the neutral ion pair of strong association type with SO3+
The absorbing reaction of MgSO3o, the dissolution reaction and SO2 that drive CaCO3 carry out to the right, and then improve reaction rate.
The organic multicomponent acid indicates with HnA, and AH-n-1 indicates the ion of organic acid dissociation, the H+ that SO2 dissolution generates by
The AH-n-1 that organic acid dissociation in liquid film generates, An- is transmitted to liquid phase main body, so that [H+] concentration reduces in liquid film, thus
The dissolution for promoting SO2, improves desulfurization degree；
Meanwhile in solid phase surface and liquid film,It is reacted with H+ and generates HCO3-；
In liquid phase main body, H+ and HCO3- reaction generate CO2 and H2O, and the reduction of [HCO3-] concentration in liquid phase main body is so that reactionIt is moved to the left, It moves right.To promote, CaCO's is molten
Solution achievees the purpose that improve desulfuration efficiency.
The organic multicomponent hydrochlorate forms acid-base conjugate system after dissociating in water, the pH of slurries has been buffered, to promote
The dissolution of CaCO3 and the absorption of SO2.All Na+ are used as chemical tunnel forming agent between film in water in mentioned component, reduce
Resistance to mass tranfer between the film of three elephant of gas, liquid, solid, effectively improves mass tranfer coefficient.The neutrality for the strong association type that Mg2+ is formed in system
Ion pair MgSO, the crystal form for destroying CaCO cause distortion of lattice, effectively prevention equipment scaling.
The present invention has the advantages that
1) FGD system desulfurization degree 5-12% is improved；
2) when coal in power plant sulfur exceeds design value 20%, it is able to maintain 90% or more desulfurization degree；
3) serum recycle intensity 1/4-1/3 is reduced, to reduce the energy consumption of desulphurization system；
4) formation of equipment calcium scale in desulphurization system is alleviated.
Specific embodiment
Hereinafter, preferred embodiments of the present invention will be described, it should be understood that preferred embodiment described herein is only used
In the description and interpretation present invention, it is not intended to limit the present invention.
Embodiment 1
Unless otherwise indicated, percentage employed in the present invention is weight percent.
A kind of Synergistic limestone desulfuration synergist, by following parts by weight at being grouped as:
90 parts of lime stone, 10 parts of dolomite, 1 part of magnesium sulfate, 1 part of adipic acid, 2 parts of adipic acid disodium；
Content >=93% of calcium carbonate in the lime stone；
The Desulfurization synergist is powdery white solia particle, and granularity is 350 mesh.
The preparation method comprises the following steps:
Above-mentioned lime stone and dolomite are crushed to 2-3cm, Raymond mill is added by belt conveyor after mixing；
By above-mentioned magnesium sulfate, adipic acid, adipic acid the disodium mixing in mixing tank for coating colors in proportion, then passes through belt feeder and weigh
Machine, which weighs, is sent into Raymond machine grinding together with the lime stone of step (1), dolomite, until granularity is 350 mesh.
Tests prove that the result of the Desulfurization synergist of the present embodiment is as follows:
Improve FGD system desulfurization degree 10%；
When coal in power plant sulfur exceeds design value 20%, it is able to maintain 93% or more desulfurization degree；
Serum recycle intensity 30% is reduced, to reduce the energy consumption of desulphurization system；
Alleviate the formation of equipment calcium scale in desulphurization system.
The preparation method comprises the following steps:
Above-mentioned lime stone and dolomite are crushed to 2-3cm, Raymond mill is added by belt conveyor after mixing；
(1) by above-mentioned magnesium sulfate, citric acid, the sodium citrate mixing in mixing tank for coating colors in proportion, then claimed by belt feeder
Heavy-duty machine, which weighs, is sent into Raymond machine grinding together with the lime stone of step (1), dolomite, until granularity is 400 mesh.
Various equipment employed in the present invention, are conventional equipment used in the production technology of this field, and each equipment
Operation, parameter etc. carried out according to routine operation, have no special feature.
Finally, it should be noted that the foregoing is only a preferred embodiment of the present invention, it is not intended to restrict the invention,
Although the present invention is described in detail referring to the foregoing embodiments, for those skilled in the art, still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features.
All within the spirits and principles of the present invention, any modification, equivalent replacement, improvement and so on should be included in of the invention
Within protection scope.
Claims (1)
1. a kind of Synergistic limestone desulfuration synergist, it is characterised in that: the Desulfurization synergist is stone by following material composition
Lime stone, dolomite, magnesium sulfate, organic multicomponent acid and organic multicomponent hydrochlorate, the parts by weight of the component are respectively as follows:
50 parts of lime stone, 35 parts of dolomite, 10 parts of magnesium sulfate, 5 parts of succinic acid, 5 parts of sodium succinate；The organic multicomponent acid is
One of citric acid, adipic acid, succinic acid, the organic multicomponent hydrochlorate are sodium citrate, adipic acid disodium, sodium succinate
One of, content >=93% of calcium carbonate in the lime stone, the Desulfurization synergist is powdery white solia particle, grain
Spend >=350 mesh.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811354895.3A CN109316943A (en) | 2018-11-14 | 2018-11-14 | A method of Desulfurization synergist is made using lime stone |
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| CN201811354895.3A CN109316943A (en) | 2018-11-14 | 2018-11-14 | A method of Desulfurization synergist is made using lime stone |
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| CN109316943A true CN109316943A (en) | 2019-02-12 |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102961957A (en) * | 2012-12-20 | 2013-03-13 | 新疆鑫恒发环保科技有限公司 | Synergistic limestone desulfuration absorbent |
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- 2018-11-14 CN CN201811354895.3A patent/CN109316943A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102961957A (en) * | 2012-12-20 | 2013-03-13 | 新疆鑫恒发环保科技有限公司 | Synergistic limestone desulfuration absorbent |
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Application publication date: 20190212 |
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