CN106268293A - A kind of wet desulphurization denitration synergist for coal-burning boiler - Google Patents
A kind of wet desulphurization denitration synergist for coal-burning boiler Download PDFInfo
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- CN106268293A CN106268293A CN201510246628.4A CN201510246628A CN106268293A CN 106268293 A CN106268293 A CN 106268293A CN 201510246628 A CN201510246628 A CN 201510246628A CN 106268293 A CN106268293 A CN 106268293A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Abstract
The invention discloses a kind of wet desulphurization denitrfying agent synergist for coal-burning boiler.The component and the percentage by weight that it is characterized in that described synergist be: oxidation accelerator class material 20-40, organic acidic material 20-40, builder material 10-30 composition.Synergist of the present invention can improve the desulfuration efficiency on absorption tower, adapts to sulphur coal, makes SO2Exit concentration is up to standard.Strengthening NO catalysis is oxidized to NO soluble in water2Ability, increases the removal of nitrogen oxides.Slurry circulating pump can also be disabled to some extent simultaneously, reach energy-conservation purpose.Synergist can promote the dissolving of limestone, improve the pH value buffer capacity of lime stone slurry, and the generation of the suppression soft dirt of calcium sulfite prevents demister from blocking, and increases desulfurated plaster purity.Improving desulfuration efficiency 5-10% under the conditions of identical liquid-gas ratio, denitration efficiency reaches 30% 50%.Reach the effect of simultaneous SO_2 and NO removal, purifying smoke.
Description
Technical field
The invention belongs to smoke gas treatment and control technical field, concrete is exactly wet for a kind of limestone-gypsum method of coal-burning boiler
Method flue gas desulfurization and denitrification synergist.
Background technology
Air Pollution Control becomes the theme of current era environmental improvement, air thing leading indicator titanium dioxide (SO2) and nitrogen oxidation conjunction
Thing (NOX).Environmental Protection Department combines issue " thermal power plant's pollutant emission standard " with national quality supervision and inspection epidemic disease general bureau will be in
On January 1st, 2012 implements, clear stipulaties: existing thermal power generation coal-burning boiler SO from 1 day January in 20142Discharge limits
Perform 200mg/Nm3, NOXDischarge limits and performs, 100mg/Nm3Limit the strictest than existing GB13223-2003 regulation discharge,
Especially for NOXDischarge will be as enforcing index.
At present, the sulfur removal technology that domestic and international large coal-fired boiler is taked is essentially Limestone-gypsum Wet Flue Gas Desulfurization Process technique due to its technique
Ripe, desulfuration efficiency height becomes the most most widely used a kind of desulfurization technology, and the most domestic firepower having put into operation desulfurizer is sent out
Group of motors wherein 80% unit use this desulfurization industry.Coal-burning power plant the most in all parts of the country faces and purchases coal difficulty, and ature of coal is poor, especially
Being coal-fired sulphur content height and big predicament of fluctuating, desulphurization system is run often at improper operating mode, and desulfuration efficiency is low.And denitration
Technique mostly uses high-temperature selective and non-selective catalytic technique (SCR, SNCR), and because exhaust gas dust content is high, life-time service is easy
Causing catalyst blockage or poisoning, denitration effect declines.And, catalyst investment is big, changes the reasons such as difficulty, longtime running
Difficult meet the requirement of environmental protection.
The technical problem to be solved be to provide one can realize in Limestone-gypsum Wet Flue Gas Desulfurization Process technique simultaneously right
The lifting of desulfurization off sulfide effect, and the technical scheme of desulfuration efficiency can be improved.In order to solve above-mentioned technical problem.This technical side
In case, oxidation accelerator is oxidized to NO2 soluble in water to NO catalysis, and this is swift in response and carries out, beneficially instant relief desulfurization
System entry high concentration SO2And higher concentration NOX；Organic acid substance, the particularly acid of organic multicomponent antelope and organic multicomponent salt have
Promote SO2Dissolve, buffer plasm PH value, the effect of promotion dissolution of calcium carbonate.In gas phase surface and liquid film, the SO of dissolving2
React with water and dissociate H+, liquid film and liquid phase main body border, R (COO-)nWith H+Reaction generates R (COOH)nSo that H+It is passed
To liquid phase main body, H in liquid film+Concentration reduction promotes SO2Dissolving, simultaneously alleviate pH value decrease speed；At solid phase surface and
In liquid film, the CO of dissolving3 -H with dissociation+Reaction generates HCO3 -, liquid phase main body, H+With HCO3 -Reaction generates CO2And H2O,
Liquid phase main body HCO3 -The reduction of concentration, thus promote the dissolving of calcium carbonate.Three kinds of action functions can guarantee that desulphurization system stable,
Effec-tive Function, improves denitrification efficiency.
Summary of the invention
The technical problem to be solved provides one can realize desulfurization in Limestone-gypsum Wet Flue Gas Desulfurization Process technique simultaneously
Denitration, and the technical scheme of desulphurization denitration rate can be improved.In order to solve above-mentioned technical problem, technical scheme provided by the present invention
It is:
A kind of wet desulphurization denitration synergist for coal-burning boiler, it is characterised in that the component of described additive and percentage by weight
For: oxidation accelerator class material 20-40, organic acidic material 30-50, builder material 10-30
Preferably, described catalytic promoter class material includes potassium permanganate, potassium peroxydisulfate, persulfuric acid calcium, sodium peroxydisulfate, mistake
Potassium acid sulfate, sodium chlorite, sodium chlorate, magnesium sulfate, sodium chloride, manganese sulfate, sodium nitrate, ammonium phosphate, diammonium phosphate,
Cobalt oxide, cobalt nitrate, cobaltous chloride, cobaltous acetate, ferrous sulfate, ammonium carbonate, triethanolamine one or more.
Preferably, described organic acid substance includes DBA, adipic acid, adipic acid sodium, humic acid, sodium humate, Fructus Citri Limoniae
Acid, sodium citrate, sodium acetate, boric acid, Borax, 1,3-propanedicarboxylic acid, succinic acid, ethanedioic acid, one or many to antelope yl benzoic acid
Kind.
Preferably, described builder material sodium sulfate, alkali formula sodium sulfate, magnesium oxide, magnesium sulfate, anhydrous sodium sulfite, sulfur
Choline, sodium citrate, copper chloride dihydrate, copper nitrate, curpic carbonate, Copper hydrate, copper oxide, sodium carbonate.
In the technical program, it is to provide one can realize desulphurization denitration in Limestone-gypsum Wet Flue Gas Desulfurization Process industry simultaneously, and
The technical scheme of desulfuration efficiency can be improved.In order to solve above-mentioned technical problem.In the technical program, catalytic promoter can be to NO
Catalysis is oxidized to NO soluble in water2, this is swift in response and carries out, beneficially instant relief desulphurization system entrance high concentration SO2And it is high
Concentration NOX；Organic acid and salts substances, the particularly acid of organic multicomponent antelope and organic multicomponent salt have promotion SO2Dissolve, buffer
Plasm PH value, the effect of promotion dissolution of calcium carbonate.In gas phase surface and liquid film, the SO of dissolving2React with water and dissociate H+,
Liquid film and liquid phase main body border, R (COO-) n and H+Reaction generates R (COOH) n and makes H+It is passed to liquid phase main body, in liquid film
H+Concentration reduction promotes SO2Dissolving, simultaneously alleviate pH value decrease speed: in solid phase surface and liquid film dissolve SO3 -Dissociation
H+Reaction generates HCO3 -, liquid phase main body, H+ and HCO3 -Reaction generates CO2And H2O, liquid phase main body HCO3 -Concentration reduce, from
And promote the dissolving of calcium carbonate.Guarantee desulphurization system is stable, Effec-tive Function, raising desulfuration efficiency, below in conjunction with embodiment pair
The present invention describes in detail.
Detailed description of the invention
Embodiment 1
A kind of wet desulphurization denitration synergist for coal-burning boiler, its component and percentage by weight be: cobalt oxide 10, sulphuric acid
Magnesium 30 adipic acid 50, citric acid 7, copper chloride dihydrate 7 are uniformly mixed.
Desulphurization system inlet flue gas SO2Concentration 2500mg/Nm3；NOx concentration 740mg/Nm3；Liquid-gas ratio 10.0；Calcium sulfur ratio 1.05.
It is 1000mg/l that additive adds concentration, and desulfuration efficiency improves 12%, and denitration efficiency is 55%.
Embodiment 2
A kind of wet desulphurization denitration synergist for coal-burning boiler, its component and percentage by weight be: potassium permanganate 30, oxidation
Cobalt 6 adipic acid 30, copper nitrate 30, humic acid 4 are uniformly mixed.
Desulphurization system inlet flue gas SO2Concentration 2500mg/Nm3；NOx concentration 780mg/Nm3；Liquid-gas ratio 9.8；Calcium sulfur ratio 1.05.
It is 900mg/l that additive adds concentration, and desulfuration efficiency improves 12%, and denitration efficiency is 65%.
Embodiment 3,
A kind of wet desulphurization denitration synergist for coal-burning boiler, its component and percentage by weight be: sodium chlorite 40, oxidation
Cobalt 1 ammonium phosphate 10, sodium acetate 10, sodium humate 10, sodium citrate 10, curpic carbonate 10 cobalt oxide 9 are uniformly mixed.
Desulphurization system inlet flue gas SO2Concentration 3500mg/Nm3；NOx concentration 800mg/Nm3；Liquid-gas ratio 10.5；Calcium sulfur ratio 1.05.
It is 1000mg/l that additive adds concentration, and desulfuration efficiency improves 12%, and denitration efficiency is 61%.
Embodiment 4,
One for wet desulfurization of flue gas by limestone-gypsum method denitration additive, its component and percentage by weight is: sodium peroxydisulfate 40,
Sodium acetate 30, sodium humate 10, curpic carbonate 8 are uniformly mixed.
Desulphurization system inlet flue gas SO2Concentration 3000mg/Nm3；NOx concentration 880mg/Nm3；Liquid-gas ratio 9.9；Calcium sulfur ratio 1.05.
It is 800mg/l that additive adds concentration, and desulfuration efficiency improves 10%, and denitration efficiency is 62%.
Embodiment 5
A kind of wet desulphurization denitration synergist for coal-burning boiler, its component and percentage by weight be: diammonium phosphate 20,
Potassium hydrogen persulfate 30 magnesium oxide 32, sodium citrate 8, curpic carbonate 10 is uniformly mixed.
Desulphurization system inlet flue gas SO2Concentration 2800mg/Nm3；NOx concentration 900mg/Nm3；Liquid-gas ratio 10.1；Calcium sulfur ratio 1.05.
It is 900mg/l that additive adds concentration, and desulfuration efficiency improves 14%, and denitration efficiency is 65%.
The above is only the citing of embodiments of the present invention, it is noted that come for those skilled in the art
Saying, on the premise of without departing from the technology of the present invention principle, it is also possible to make some improvement and modification, these improve and modification also should
It is considered as protection scope of the present invention.
Claims (4)
1. the wet desulphurization denitration synergist for coal-burning boiler, it is characterised in that the component of described additive and weight percent
Ratio is: oxidation accelerator class material 20-40, organic acidic material 30-50, builder material 10-30.
A kind of wet desulphurization denitration synergist for coal-burning boiler the most according to claim 1, it is characterised in that described
Oxidation accelerator class material include potassium permanganate, potassium peroxydisulfate, persulfuric acid calcium, sodium peroxydisulfate, potassium hydrogen persulfate, sodium chlorite,
Sodium chlorate, magnesium sulfate, sodium chloride, manganese sulfate, sodium nitrate, ammonium phosphate, diammonium phosphate, cobalt oxide, cobalt nitrate, chlorination
Cobalt, cobaltous acetate, ferrous sulfate, ammonium carbonate, triethanolamine one or more.
A kind of wet desulphurization denitration synergist for coal-burning boiler the most according to claim 1, it is characterised in that described
Organic acidic material matter includes DBA, adipic acid, adipic acid sodium, humic acid, sodium humate, citric acid, sodium citrate, acetic acid
Sodium, boric acid, Borax, 1,3-propanedicarboxylic acid, succinic acid, ethanedioic acid, to one or more of antelope yl benzoic acid.
A kind of wet desulphurization denitration synergist for coal-burning boiler the most according to claim 1, it is characterised in that described
Builder material sodium sulfate, alkali formula sodium sulfate, magnesium oxide, magnesium sulfate, anhydrous sodium sulfite, akali sulphide, sodium citrate, two
Water copper chloride, copper nitrate, curpic carbonate, Copper hydrate, copper oxide, sodium carbonate.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107362676A (en) * | 2017-07-27 | 2017-11-21 | 神华集团有限责任公司 | Desulfurization synergist and its application |
| CN107497273A (en) * | 2017-09-25 | 2017-12-22 | 济南大学 | A kind of preparation method and application of environment protection, low cost smoke denitrifier |
| CN108043211A (en) * | 2018-01-24 | 2018-05-18 | 东莞市升佳净水材料有限公司 | A kind of Desulfurization synergist and preparation method thereof |
| CN108404643A (en) * | 2018-05-25 | 2018-08-17 | 华北电力大学 | Coal-fired power station boiler compressed air is atomized calcium-based slurries and removes SO3Device and method |
| CN108568201A (en) * | 2018-05-09 | 2018-09-25 | 西安瑞杰油田物资实业开发有限公司 | A kind of Desulfurization synergist and preparation method thereof |
| CN108854489A (en) * | 2018-06-27 | 2018-11-23 | 任朝兴 | A kind of method that humate strengthens calcium hydroxide desulfurization |
| CN112221522A (en) * | 2020-09-22 | 2021-01-15 | 中节能（秦皇岛）环保能源有限公司 | In-furnace denitration catalyst and application thereof |
| CN113814002A (en) * | 2020-06-18 | 2021-12-21 | 中国石油化工股份有限公司 | Coal-fired catalyst and preparation method and application thereof |
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| JPS5242461A (en) * | 1975-09-19 | 1977-04-02 | Toray Ind Inc | Method of oxidizing no |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107362676A (en) * | 2017-07-27 | 2017-11-21 | 神华集团有限责任公司 | Desulfurization synergist and its application |
| CN107497273A (en) * | 2017-09-25 | 2017-12-22 | 济南大学 | A kind of preparation method and application of environment protection, low cost smoke denitrifier |
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| CN108404643A (en) * | 2018-05-25 | 2018-08-17 | 华北电力大学 | Coal-fired power station boiler compressed air is atomized calcium-based slurries and removes SO3Device and method |
| CN108854489A (en) * | 2018-06-27 | 2018-11-23 | 任朝兴 | A kind of method that humate strengthens calcium hydroxide desulfurization |
| CN113814002A (en) * | 2020-06-18 | 2021-12-21 | 中国石油化工股份有限公司 | Coal-fired catalyst and preparation method and application thereof |
| CN112221522A (en) * | 2020-09-22 | 2021-01-15 | 中节能（秦皇岛）环保能源有限公司 | In-furnace denitration catalyst and application thereof |
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Application publication date: 20170104 |