CN102091510A - Flue gas desulfurization synergist and using method thereof - Google Patents
Flue gas desulfurization synergist and using method thereof Download PDFInfo
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- CN102091510A CN102091510A CN2010105932038A CN201010593203A CN102091510A CN 102091510 A CN102091510 A CN 102091510A CN 2010105932038 A CN2010105932038 A CN 2010105932038A CN 201010593203 A CN201010593203 A CN 201010593203A CN 102091510 A CN102091510 A CN 102091510A
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- flue gas
- gas desulfurization
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- desulfurization synergist
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Abstract
The invention discloses a flue gas desulfurization synergist which comprises the following components in percent by weight: 30-80 percent of diacid, 5-30 percent of inorganic salt and 1-50 percent of wetting agent. A using method of the flue gas desulfurization synergist is characterized by comprising the steps of: firstly, preparing lime into lime slurry of 50-300PPm, adding 300-1000mg/L of gas desulfurization synergist in the lime slurry, mechanically stirring uniformly, and then pumping the lime slurry added with the gas desulfurization synergist into a desulfuration reaction tower by using a lime slurry pump. By using the gas desulfuration synergist, the desulfuration efficiency is improved by 5-15 percent, the consumption of limestone is reduced, the scale formation and the blockage of equipment are reduced, and the operation electric energy is saved.
Description
Technical field
The present invention relates to the flue gas desulfurization technique field, relate in particular to a kind of flue gas desulfurization synergist and using method thereof.
Background technology
Along with the increase of electricity needs, coal fired power generation has become one of main method that obtains electric energy both at home and abroad.The SO that thermal power plant's coal-fired flue-gas discharging causes
2Pollute seriously day by day, subdue and control the coal-fired SO of thermal power plant
2Pollute, just become the most urgent task in Air Pollution Control field.Limestone-gypsum smoke-gas wet desulfurization (Flue Gas Desulfurization, english abbreviation FGD) technology because of its technical maturity, good to the adaptability of coal, desulfuration efficiency is high and system's operational reliability is high is used widely.In recent years, because the variation of coal market, the sulfur content that factory's coal advances in a lot of thermal power plants is bigger than normal many than design load, makes the desulphurization system overload operation, causes desulfuration efficiency to descend, and has a strong impact on flue gas SO
2Qualified discharge.Simultaneously for low concentration SO
2Flue gas remove, have that desulfurization investment is big, operating cost is high, easily obstruction of desulphurization system, fouling, burn into wearing and tearing, leakage, difficult in maintenance a, problem such as maintenance workload is big.In addition, desulphurization system operation station service power consumption rate is higher, and energy-saving and cost-reducing also is the problem that merits attention.In order to improve flue gas desulfurization technique and sulfur dioxide absorption efficiency, people have done number of research projects, have therefrom also developed the technology of desulfurization synergistic agent raising absorption efficiency.Chinese patent CN101574615 has disclosed a kind of desulfurization synergistic agent, and the percentage by weight of the composition of this synergist is: the water of the alkyl sulfosuccinate of percent 5-70, the wetting agent of percent 1-30 and residue percentage combines.Can improve the efficient of limestone slurry desulfurization, not only reduce the consumption of lime stone, and promote the dewatering efficiency of gypsum, reduce the generation of by-produced gypsum, alleviate the problem that environmental protection is piled up and handled to gypsum, save the running electric energy of flood tide.Though this desulfurization synergistic agent can improve desulfuration efficiency, reduce the consumption of lime, can not solve the fouling and the blockage problem of equipment.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of flue gas desulfurization synergist, uses this flue gas desulfurization synergist can make desulfuration efficiency improve 5-15%, reduces amount of lime, reduces the fouling and the obstruction of equipment, saves the running electric energy.The present invention also provides the using method of this flue gas desulfurization synergist.
For solving the problems of the technologies described above, the flue gas desulfurization synergist that provides of the present invention is made up of binary acid, inorganic salts and wetting agent.
The percentage by weight (%) of each component of flue gas desulfurization synergist of the present invention is: binary acid 30%-80%, inorganic salts 5%-30%, wetting agent 1%-50%.
Each component preferred content of flue gas desulfurization synergist of the present invention: binary acid 60%-80%, inorganic salts 15%-25%, wetting agent 5%-15%.
The optimum content of each component of flue gas desulfurization synergist of the present invention: binary acid 70%, inorganic salts 20%, wetting agent 10%.
Binary acid is adipic acid or glutaric acid in the flue gas desulfurization synergist of the present invention, and inorganic salts are a kind of in sodium chloride, sodium sulphate, the magnesium sulfate, and wetting agent is a sulfosuccinic acid di-isooctyl sodium.
The present invention also provides the using method of flue gas desulfurization synergist, earlier lime is mixed with the lime slurry of 50-300PPm, in lime slurry, add 300-1000mg/L flue gas desulfurization synergist again, mechanical agitation is even, with the lime white liquid pump lime slurry that has added the flue gas desulfurization synergist is pumped in the desulfurization reaction tower then.
Introduce the synergy principle of smoke-gas wet desulfurization principle and desulfurization synergistic agent below:
1, limestone-gypsum smoke-gas wet desulfurization principle
Former flue gas SO
2Dissociate after being dissolved in absorption liquid:
SO
2The reaction that is dissolved in water is a long response time, is one of entire reaction rate controlling step.
In slurries pond, absorption tower, HSO
3 -The force air that is passed into is oxidized to SO
4 2-:
In the aqueous solution, lime stone solubility is very low (≈ 0.015kg/m
3):
The reaction of partly soluble agstone in slurries:
2, the synergy principle of desulfurization synergistic agent
Learn that from above course of reaction the major control step of desulphurization reaction is in (1) and (3).Be that gas-liquid two-phase is to make SO at the interface
2The low pH value that dissolving and absorption rate reduce; Solid-liquid two-phase interface place makes CaCO
3The high pH value of dissolving and disassociation.Use synergist, owing to accelerated the H of generation in the reaction (1)
+To the liquid internal diffusion, increased CaCO
3Solubility promptly add the speed of fast response (3), regulated the pH value of slurries, for desulphurization reaction provides basic group, make desulfuration efficiency be improved.
In the desulphurization reaction process, the effect of synergist energy is as follows:
(1) significantly cushions the reduction of wet desulphurization pH value, improve sulfur dioxide gas-liquid mass transfer rate, strengthen the absorption of sulfur dioxide is improved desulfurization degree.Especially in low pH value section, act on more significantly, and in the finite concentration scope, the concentration of desulfurization synergistic agent is high more, effect is good more;
(2) SO in lime stone slurry and flue gas
2During contact, can obviously improve desulfurization chemical reaction and mass transport process condition, promote the dissolving of agstone particle and improve reactivity, reduce the consumption of agstone, the gypsum quality is had no adverse effects at gas, solid, liquid three phase boundary place;
(3) because the peptizaiton that the desulfurization synergistic agent is had reduces lime stone sinking speed speed, reduce the fouling of equipment and stop up.Change the characteristic of crystal of calcium sulfate body, prevent that crystalline solid from depositing at positions such as nozzles;
(4) synergy of binary acid and inorganic salts can effectively improve desulfuration efficiency.
Add the sulfur method of synergist and compare, have following advantage with existing sulfur method:
Desulfurization synergistic agent of the present invention can reduce surface tension, reduces slurry viscosity, increases the dispersiveness of particle in the slurries, thereby has increased overall reaction rate, improves desulfuration efficiency 5-15%, reduces amount of lime, reduces the fouling and the obstruction of equipment, saves the running electric energy.
The specific embodiment
Adopt 10 embodiment to describe the present invention in detail below, when system's desulfuration efficiency decline, the fluctuation of system handles benefit, add flue gas desulfurization synergist of the present invention, the adding method is: the lime slurry that earlier lime is mixed with 50-300PPm, in lime slurry, add 300-1000mg/L flue gas desulfurization synergist again, mechanical agitation is even, with the lime white liquid pump lime slurry that has added is pumped in the desulfurization reaction tower then.The constituent content of flue gas desulfurization synergist sees Table 1.
The component of table 1. flue gas desulfurization synergist
| Embodiment | Binary acid (%) | Inorganic salts (%) | Wetting agent (%) |
| 1 | 30 | 20 | 50 |
| 2 | 40 | 30 | 30 |
| 3 | 50 | 25 | 25 |
| 4 | 60 | 15 | 25 |
| 5 | 70 | 10 | 20 |
| 6 | 80 | 10 | 10 |
| 7 | 80 | 19 | 1 |
| 8 | 65 | 30 | 5 |
| 9 | 80 | 5 | 15 |
| 10 | 55 | 5 | 40 |
Lime is mixed with certain density lime stone slurry, and adds a certain amount of sulfur-removing additives, mechanical agitation is even, can squeeze in the desulfurization reaction tower through the limestone slurry liquid pump at any place of slurries closed circuit, or add when replenishing lime slurry.Descend at system's desulfuration efficiency, add this product when the system handles benefit fluctuates, the system that is beneficial to is recovered and raising integrated treatment character.
Flue gas desulfurization synergist addition scope of the present invention is at 300-1000mg/L, it also is the flue gas desulfurization synergist that 1 liter of lime stone slurry adds 300-1000mg, its appropriate amount depends on the content of sulfur-bearing, vanadium and other impurity of coal and the character of boiler, can suitably adjust in conjunction with former processing efficient of fielded system and the target efficiency that will reach.Generally speaking, along with addition increases, effect can continue to improve and finally reach maximum thereupon.
Claims (8)
1. a flue gas desulfurization synergist is characterized in that, its component is binary acid, inorganic salts and wetting agent.
2. flue gas desulfurization synergist according to claim 1 is characterized in that the percentage by weight of described component (%) is: binary acid 30%-80%, inorganic salts 5%-30%, wetting agent 1%-50%.
3. as flue gas desulfurization synergist as described in the claim 2, it is characterized in that the percentage by weight of described component (%) is: binary acid 60%-80%, inorganic salts 15%-25%, wetting agent 5%-15%.
4. as flue gas desulfurization synergist as described in claim 2 or 3, it is characterized in that the percentage by weight of described component (%) is: binary acid 70%, inorganic salts 20%, wetting agent 10%.
5. as flue gas desulfurization synergist as described in one of claim 1 to 4, it is characterized in that described binary acid is adipic acid or glutaric acid.
6. as flue gas desulfurization synergist as described in one of claim 1 to 4, it is characterized in that described inorganic salts are a kind of in sodium chloride, sodium sulphate, the magnesium sulfate.
7. as flue gas desulfurization synergist as described in one of claim 1 to 4, it is characterized in that described wetting agent is a sulfosuccinic acid di-isooctyl sodium.
8. using method as flue gas desulfurization synergist as described in one of claim 1 to 7, it is characterized in that, earlier lime is mixed with the lime slurry of 50-300PPm, in lime slurry, add 300-1000mg/L flue gas desulfurization synergist again, mechanical agitation is even, with the lime white liquid pump lime slurry that has added the flue gas desulfurization synergist is pumped in the desulfurization reaction tower then.
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|---|---|---|---|
| CN 201010593203 CN102091510B (en) | 2010-12-17 | 2010-12-17 | Flue gas desulfurization synergist and using method thereof |
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|---|---|---|---|
| CN 201010593203 CN102091510B (en) | 2010-12-17 | 2010-12-17 | Flue gas desulfurization synergist and using method thereof |
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| CN102091510A true CN102091510A (en) | 2011-06-15 |
| CN102091510B CN102091510B (en) | 2013-09-04 |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102380301A (en) * | 2011-08-15 | 2012-03-21 | 西安热工研究院有限公司 | Limestone-plaster wet method flue gas desulfurization composite synergistic agent |
| CN102773003A (en) * | 2012-07-13 | 2012-11-14 | 湖北海力化工科技有限公司 | Limestone slurry dispersing agent for limestone wet desulfurization and preparation method thereof |
| CN102807288A (en) * | 2012-07-13 | 2012-12-05 | 湖北海力化工科技有限公司 | Scale inhibitor for limestone wet-process desulphurization and preparation method thereof |
| CN102814118A (en) * | 2012-09-17 | 2012-12-12 | 上海电力学院 | Flue gas desulfurization additive, and preparation method and application thereof |
| 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 |
| CN102974209A (en) * | 2012-07-13 | 2013-03-20 | 湖北海力化工科技有限公司 | Desulfurization synergist having scale inhibition performance, and preparation method thereof |
| WO2013082856A1 (en) * | 2011-12-06 | 2013-06-13 | 江苏省电力科学研究院 | Wet limestone flue gas desulfurization slurry stabilizer and method of using same |
| CN103357256A (en) * | 2012-03-31 | 2013-10-23 | 湖南晟通科技集团有限公司 | Limestone-gypsum wet-process desulphurization additive |
| CN103357263A (en) * | 2012-03-31 | 2013-10-23 | 湖南晟通科技集团有限公司 | Wet-process flue gas desulfurization additive |
| CN103446870A (en) * | 2013-09-05 | 2013-12-18 | 北京华电卓越科技有限公司 | Desulfurization additive as well as applications and using method of same |
| CN103721556A (en) * | 2014-01-20 | 2014-04-16 | 高同柱 | Desulfurization, denitrification and demercuration additive as well as preparation method thereof |
| CN110237668A (en) * | 2019-05-28 | 2019-09-17 | 浙江省地质矿产研究所 | Method for improving desulfurization efficiency of limestone desulfurizer |
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102380301A (en) * | 2011-08-15 | 2012-03-21 | 西安热工研究院有限公司 | Limestone-plaster wet method flue gas desulfurization composite synergistic agent |
| WO2013082856A1 (en) * | 2011-12-06 | 2013-06-13 | 江苏省电力科学研究院 | Wet limestone flue gas desulfurization slurry stabilizer and method of using same |
| US9399191B2 (en) | 2011-12-06 | 2016-07-26 | State Grid Corporation Of China | Wet limestone flue gas desulfurization slurry stabilizer and method for using the same |
| CN103357263A (en) * | 2012-03-31 | 2013-10-23 | 湖南晟通科技集团有限公司 | Wet-process flue gas desulfurization additive |
| CN103357256A (en) * | 2012-03-31 | 2013-10-23 | 湖南晟通科技集团有限公司 | Limestone-gypsum wet-process desulphurization additive |
| CN102974209B (en) * | 2012-07-13 | 2014-09-10 | 湖北海力化工科技有限公司 | Desulfurization synergist having scale inhibition performance, and preparation method thereof |
| CN102974209A (en) * | 2012-07-13 | 2013-03-20 | 湖北海力化工科技有限公司 | Desulfurization synergist having scale inhibition performance, and preparation method thereof |
| CN102773003B (en) * | 2012-07-13 | 2013-07-17 | 湖北海力化工科技有限公司 | Limestone slurry dispersing agent for limestone wet desulfurization and preparation method thereof |
| CN102807288A (en) * | 2012-07-13 | 2012-12-05 | 湖北海力化工科技有限公司 | Scale inhibitor for limestone wet-process desulphurization and preparation method thereof |
| CN102773003A (en) * | 2012-07-13 | 2012-11-14 | 湖北海力化工科技有限公司 | Limestone slurry dispersing agent for limestone wet desulfurization and preparation method thereof |
| CN102814118A (en) * | 2012-09-17 | 2012-12-12 | 上海电力学院 | Flue gas desulfurization additive, and preparation method and application thereof |
| 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 |
| CN103446870A (en) * | 2013-09-05 | 2013-12-18 | 北京华电卓越科技有限公司 | Desulfurization additive as well as applications and using method of same |
| CN103446870B (en) * | 2013-09-05 | 2015-11-18 | 北京华电卓越科技有限公司 | Sulfur-removing additives, purposes and using method |
| CN103721556A (en) * | 2014-01-20 | 2014-04-16 | 高同柱 | Desulfurization, denitrification and demercuration additive as well as preparation method thereof |
| CN110237668A (en) * | 2019-05-28 | 2019-09-17 | 浙江省地质矿产研究所 | Method for improving desulfurization efficiency of limestone desulfurizer |
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