CN101850212A - Method for removing total mercury from coal burning smoke - Google Patents
Method for removing total mercury from coal burning smoke Download PDFInfo
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- CN101850212A CN101850212A CN 201010188844 CN201010188844A CN101850212A CN 101850212 A CN101850212 A CN 101850212A CN 201010188844 CN201010188844 CN 201010188844 CN 201010188844 A CN201010188844 A CN 201010188844A CN 101850212 A CN101850212 A CN 101850212A
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Abstract
The invention discloses a method for removing total mercury from coal burning smoke, which comprises the following steps of: mixing a lime (limestone) desulfurizing agent and a sodium sulfide mercury remover uniformly, spraying the uniformly mixed solution into a desulfurizing tower during lime (limestone)-gypsum wet smoke desulfuration, and removing the total mercury from the smoke at the same time during the lime (limestone)-gypsum wet smoke desulfuration. The method is simple and convenient to operate, does not need great reformation on the conventional desulfuration facilities, has lower mercury removal cost, and does not produce secondary pollution to the environment.
Description
Technical field
The present invention relates to remove the method for mercury contaminants in the coal-fired flue-gas, be specifically related to be used for the removal methods of institute of coal-fired enterprise discharged flue gas mercury contaminants such as each high-power station and industrial boiler factory.
Background technology
Mercury becomes the SO that continues because its distinctive effumability, persistence and biological accumulation have become toxic metals element atmosphere pollution of greatest concern
2And NO
XThe atmosphere pollution that another afterwards class need be controlled on a large scale.According to statistics: the annual atmosphere mercury emissions that causes because of human factor in the whole world is at 2000-3400t.Wherein the mercury emission that causes of coal-fired process accounts for 1/3, becomes maximum artificial mercury pollution source.
It is the country of main energy sources with coal that China is one, and the proportion of coal in disposable energy-consuming accounts for 2/3.The analysis of coal sample of whole nation leading coal producing province part shows: China's raw coal average mercury content is 0.22mg/kg, approaches the mean value 0.17mg/kg of the U.S., far above the average abundance 0.08mg/Kg and the world raw coal average mercury abundance 0.12mg/Kg of earth's crust mercury.The washing rate of raw coal is generally on the low side in addition, makes that the discharge capacity of coal-fired mercury is very big.Coal fire discharged mercury has caused severe contamination to China's atmospheric environment.
Serious day by day in view of coal-fired mercury emissions, Environmental Protection Agency (US EPA) announced and will implement control to coal-burning power plant's mercury emissions on the basis of nineteen ninety clean air amendment (CAAAs) III money on December 14th, 2000.Presidential clean air bill in 2003 (President ' s Clear Skies Act of 2003) has clearly proposed the plan of subduing of the following atmosphere mercury pollution of the U.S..Up to the present, also be in pilot scale and trial run stage about the coal-fired flue gas mercury removal technology both at home and abroad, these control technologys mainly contain: flue gas upstream sorbent/absorbent sprays into method, existing various flue gas control device demercuration methods or the like, does concise and to the point introduction below.
(1) flue gas upstream sorbent/absorbent sprays into method
(1.1) powder activated carbon (PAC) sprays into method
This method is used for municipal refuse burning (MWC) or city garbage burning (MWI) flue gas demercuration the earliest.Its operation principle is: PAC is directly sprayed into the flue gas upstream, and the suction-operated by PAC reaches demercuration.This method is tried out on coal-burning boiler at present, and the working condition of its demercuration rate and coal, boiler and the straying quatity of activated carbon are closely related.
Adopt PAC to spray into method, the demercuration rate of general bituminous coal is higher than subbituminous coal and brown coal.Active carbon is nonselective absorbent, in order to improve uptake, will add some auxiliary agents in active carbon usually, such as sulphur, iodine, chlorine, nitric acid etc., has so not only increased cost absorption, also can bring simultaneously problems such as the corrosion of equipment and depositions.
The demercuration expense that PAC sprays into method is still quite expensive at present.This be because the very low and mercury of mercury content in the flue gas have form different and different along with coal and combustion conditions condition, and be subjected to the influence of the factors such as distributing homogeneity in the lower equilibrium adsorption capacity of activated carbon, quality conversion ratio and the flue gas, time of contact between gas phase and the solid phase is very brief in addition, and activated carbon also may adsorb other component in the flue gas, and it is very difficult to the saturated extent of adsorption 200-5000 μ g/g of mercury to want to reach activated carbon.And the granularity that requires activated carbon in the process of the test superfine (μ m level), straying quatity is very big, and for example: for mercury content in the flue gas is 10 μ g/Nm
3, the time of staying is 2s, wants to reach 90% demercuration rate, and needing Hg/C ratio is 1: 3000 (4 μ m) and 1: 18000 (10 μ m), and this makes the demercuration expense extremely expensive.Estimate according to USDOE (US DOE): reach 90% demercuration rate, its investment should be at ten thousand dollars of/ton mercury of 2.5-7.Though also have activated carbon is carried out immersion treatment with reagent such as iodine, sulphur, can improve the demercuration rate to a certain extent, the post-processing difficulty of contaminated activated carbon also can correspondingly strengthen behind the demercuration, moreover it is just quite expensive to soak expense itself with iodine.
(1.2) sodium tetrasulfide sprays into method
Sodium tetrasulfide (Na
2S
4) method is the absorption process of a kind of flue bicycle pump of developing of U.S. Babcock Utilities Electric Co..Its operation principle is: with Na
2S
4Directly spray into mercurous flue gas upstream, pass through Na
2S
4And the chemical reaction between the different shape mercury finally generates HgS and realizes demercuration.Test is to carry out on the coal-burning installation of U.S. Southern Res Inst (Southern Research Institute), the coal-fired kind of institute is respectively typical east bituminous coal and western PRB (Powder River Basin) subbituminous coal, in their burning back institute smoke discharging mercury exist morphological differences bigger, the former is with Hg
2+Be main, the latter is then with Hg
0In the majority.Show by experimental study, if in flue gas, spray into Na
2S
4, can realize flue gas demercuration by following reaction:
Na
2S
4+HgCl
2＝HgS+2NaCl+3S
0 (1)
Hg
0+S
0＝HgS↓ (2)
So, can be with Hg
0And Hg
2+Change into HgS stable on the thermodynamics, removed with PCD again.Simultaneously, HCl in the flue gas and CO
2Also can with excessive N a
2S
4Reaction generates S
0, again with flue gas in Hg
0Reaction:
Na
2S
4+2HCl＝H
2S+3S
0+2NaCl (3)
HgCl
2+H
2S＝HgS+2HCl (4)
Hg
0+S
0＝HgS↓ (5)
If lack HCl, CO
2Also can with Na
2S
4Reaction:
Na
2S
4+2CO
2+2H
2O＝H
2S+3S
0+2NaHCO
3 (6)
By analyzing, we find that still there are 2 deficiencies in this technology: (1) Na
2S
4Addition big especially, the demercuration expense is very expensive.It was reported data: the coal of burning in the commerical test process is respectively eastern united states bituminous coal and western PRB (Powder River Basin) subbituminous coal, and its mercury content is respectively 0.065g/t coal and 0.068g/t coal, and the Na that demercuration need spray into
2S
4Respectively up to 1000g/t coal and 700g/t coal (reaching 90% demercuration rate), be about 1.5 ten thousand times and 10,000 times of mercury content in the coal.This mainly is that mercury content is low, throughput is big because reaction is the gas-solid reaction of at high temperature carrying out, lack the time of contact between gas-solid, in addition Na
2S
4Dispersed bad, guarantee high demercuration efficient, the essential Na that strengthens
2S
4Straying quatity.This has also increased the demercuration expense greatly and (it is reported: Na
2S
4The about 6000 yuan/t of the market price, content 30%).(2) demercuration mechanism existing problems.According to this report: H
2The generation of S is because HCl or the CO in the flue gas
2With Na
2S
4Interaction generates.But to Na
2S
XChemical behavior in coal-fired flue-gas studies show that: work as Na
2S
4Spray in the flue, at a large amount of SO
2There is down Na with water vapour
2S
4Hydrolysis can take place, and produces H
2S gas and S
0, during pH=7.5-11.5, this process is carried out very violently:
Na
2S
X(X＝2，4，5)+SO
2(g)+H
2O＝Na
2SO
3+(X-1)S+H
2S(g) (7)
And only under acid condition, just HCl or CO can appear
2With Na
2S
4Interact and generate H
2The situation of S.Therefore, this demercuration mechanism still needs further discussion.
(1.3) flyash absorption method
The flying dust charcoal that is produced by coal-powder boiler has tiny particle diameter and practicality, and is used as a kind of potential mercury absorbent already and studies.Flying dust has manifested very important effect aspect the flue gas mercury emissions control of incinerator.Flyash is 10 μ gHg/g flyash (bituminous coal), 30 μ g/g flyash (brown coal) to the saturated extent of adsorption of mercury.Flyash can also catalytic oxidation Hg
0And adsorb it.Under similar condition, a little less than the adsorption capacity specific activity charcoal of flyash, but consider that flyash is cheap and easy to get, it is the good substitute of active carbon.Experiment shows that smoke components, unburned carbon and specific area thereof, various chemical treatment all are the key factors that influences the flyash adsorbance.
(1.4) other adsorbents
Higher in view of the active carbon cost, there are some other mercury absorbents to substitute in succession, for example: zeolite, bromination carbon, coal tar, the carbon adsorbent that mixes sulphur, Ca-base adsorbent, petroleum coke, the non-absorbent carbon of TDA, PERFORMANCE OF MODIFIED VERMICULITE etc.
The amount of zeolite absorption mercury is compared little with active carbon, can reach the effect the same with active carbon after adding some auxiliary agents processing under the situation of same spraying rate.The bromation of carbon can improve and accelerate Hg
0Absorption, be 0.33% o'clock at the content of bromine, adsorbance has increased by 80 times, reaches 0.2mg/g carbon.TDA is a kind of New Absorbent with absorption/catalytic association function, can be mercury oxidation, catch and can remove the mercury of each form.This absorbent has very high mercury absorptive capacity, and cost is low, and specific area is up to 150 to 580m
2/ g.The absorbability of this absorbent reaches 1.1mg/g, and relevant with the concentration of sulfur dioxide.Vermiculite is through MnO
2And FeCl
3Dipping back absorption mercury vapour ability improves greatly.Compare with active carbon, vermiculite is cheap, and impregnation steps is simple, and the required reagent of modification is cheap.
(2) existing various flue gas control device demercuration methods
The existing particle control device of installing (PCD), SCR (SCR) device and flue gas desulfurization (FGD) device also can remove partial fume mercury at present.
(2.1) particle control device (PCD)
Have 77% coal-burned industrial boiler that ESP (electrostatic precipitation) or FF (bag-type dust) are installed in the U.S. approximately, obtained dust removing effects preferably, simultaneously to flue gas mercury particularly particle ADSORPTION STATE mercury certain removal effect is also arranged.Wherein the FF device can obtain higher demercuration rate (72-90%), is (cold side) ESP, (hot side) ESP and particle wash mill then successively.From coal, the demercuration rate of bituminous coal is the highest, is thereafter subbituminous coal and brown coal successively.Dust arrester demercuration rate depends on form, fly ash content, flying dust character and the flue-gas temperature of mercury in the flue gas or the like.It is generally acknowledged that most of mercury are attracted on the carbon granule that does not burn in the flying dust, Hg
2+Compare Hg
0Easier absorption.Contacting between the gaseous mercury that the reason that FF is better than ESP demercuration rate is the former and the flying dust is more abundant.
Venturi is the equipment that a kind of common dependence water spray carries out dedusting.But it still is limited for removing of flue gas mercury.Because for ADSORPTION STATE mercury, have 90% to condense in granularity approximately less than in the particle below the 0.125mm, Venturi is not high to the removal efficiency of these grain dusts.As for Hg
0, because it is water insoluble, more difficult removing in Venturi.Hg
2+Though solvable, remove it up hill and dale, had better use absorbent.
Other dust removal with machine method such as cyclone dust removal can not remove the particle of particulate, and is therefore all relatively poor to the removal effect of the mercury of ADSORPTION STATE and total mercury thereof.
(2.2) SCR (SCR) device
SCR is a kind of common NO in the flue gas that removes
XDevice.Early stage field trial in Europe shows: SCR can be in subduing flue gas NO
XThe time increase the ratio of oxidation state mercury.Oxygenation efficiency can be subjected to the influence of the factors such as content of chlorine in the concentration of superficial linear velocity in a column, reaction temperature, ammonia of catalyst and the flue gas.Test also shows: the new SCR catalyst of installing can make the part nonvalent mercury be oxidized to the mercury of ionic state, but when temperature when too high and flue gas flow rate is too fast, the mercury content of ionic state descends, and adds amount of decrease increase behind the ammonia, and As time goes on, amount of decrease is bigger.
(2.3) flue gas desulfurization (FGD) device
Wet method and dry flue gas desulphurization (WFGD/DFGD) are widely used in the U.S., Europe and area, Asia, and it can remove the SO more than 95% in the coal-fired flue-gas
2The U.S. has 20% coal-burning boiler use WFGD device approximately at present.But these devices only can remove about 90% Hg
2+, and to Hg
0Almost few of removing, total demercuration rate also has only 45-67%.And remove the Hg that gets off sometimes
2+Again can be with Hg
0Form discharge again, its recruitment is about 15%.
There is 10% coal-burning boiler to adopt spray drying process (SDA) control SO approximately in the U.S.
2Discharging.By the SDA device, the mercury that part of smoke mercury particularly is the particle ADSORPTION STATE can be removed, because not only contain flying dust in this adsorbent, but also contains calcium sulfite, calcium sulfate and unreacted absorbent, can increase the adsorbance of ADSORPTION STATE mercury.By using PCD, nearly all ADSORPTION STATE mercury all can be removed again.
In the flue gas mercury remove the influence that is subjected to several factors, comprise the use etc. of content, distribution, smoke components, reaction condition, adsorbent character and other active additives of mercury in the flue gas.The influence of smoke components is very big, if contain a large amount of sulfur dioxide or nitrogen oxide in the flue gas, will hinder the absorption of mercury.
Adopt the PAC method of spraying into to obtain higher demercuration rate, but the granularity that requires activated carbon superfine (μ m level), Hg/C ratio is minimum by (1: 3000-1: 18000), the better dispersed and specific coal of burning in flue gas, this will increase operation easier widely, cause the higher expense that removes.Though the sodium tetrasulfide method of spraying into can remove the mercury of different shape in the flue gas, it is equally very expensive to remove expense, also may produce poisonous H in the subtractive process
2S gas.In the PCD device, best with FF, secondly be (cold side)-ESP, (hot side)-ESP, Venturi and other dust removal with machine equipment, their demercuration rate is widely different, to the bad adaptability of coal.But the section H g in the SCR catalytic oxidation flue gas
0, but often restraining factors are too many, particularly the concentration of smoke components, reaction temperature, ammonia and superficial linear velocity in a column or the like.The FGD device mainly can remove water miscible Hg
2+, and to Hg
0Be difficult to remove.
Summary of the invention
The objective of the invention is to overcome the shortcoming of existing demercuration technology, provide that a kind of disposal cost is low, removal effect good, free of contamination a kind of method that removes total mercury in the coal-fired flue-gas.
The object of the present invention is achieved like this:
A kind of method that removes total mercury in the coal-fired flue-gas, after lime (stone) desulfurizing agent and akali sulphide mercury removal agent mixed, in lime (stone)-gypsum wet flue gas desulfurizing process, the mixed solution that obtains after above-mentioned the mixing is sprayed in the desulfurizing tower, in lime (stone)-gypsum wet flue gas desulfurizing, total mercury removes in the realization flue gas.
Above-mentioned a kind of method that removes total mercury in the coal-fired flue-gas, it is 1-3mol.L that described akali sulphide mercury removal agent adopts concentration
-1The akali sulphide aqueous solution.
Above-mentioned a kind of method that removes total mercury in the coal-fired flue-gas, the addition of Gas with Sodium Sulfide Solution account for 5 percent to ten thousand of lime (stone) desulfurizing agent volume/.
Above-mentioned a kind of method that removes total mercury in the coal-fired flue-gas, after Gas with Sodium Sulfide Solution and lime (stone) desulfurizing agent mixed, the pH value of circulation fluid was 5-6.5 when implementing flue gas desulfurizing and hydrargyrum-removing.
Above-mentioned a kind of method that removes total mercury in the coal-fired flue-gas, described akali sulphide is technical grade vulcanized sodium, wherein Containing Sulfur sodium 54-60Wt.%.
Above-mentioned a kind of method that removes total mercury in the coal-fired flue-gas, the removal efficiency of described flue gas mercury is 65-85Wt.%, average out to 83Wt.%.
The demercuration mechanism of the inventive method is: akali sulphide is after water-soluble, and complete ionization can take place in water solution system vulcanized sodium:
Na
2S=2Na
++ S
2-(under the water-soluble condition)
Ion state mercury in the flue gas (is mainly Hg
2+) precipitation reaction will take place with it, this part mercury can be absorbed very soon:
S
2-+ Hg
2+=HgS ↓ (sediment)
And the basis of the vulcanized sodium in the circulation fluid also can react with sulfur dioxide under the solutions of weak acidity of pH=5-6.5:
2Na
2S+3SO
2＝2Na
2S
2O
3+S
0↓
Elemental sulfur element (the S that separates out
0) activity very strong, can with the nonvalent mercury (Hg that exists in the flue gas
0) react:
S
0+ Hg
0=HgS ↓ (sediment)
Thereby reach removing fully of total mercury in the flue gas.
With respect to existing other flue gas demercuration technology, advantage of the present invention is mainly reflected in:
(1) method is simple, and is easy to operate.Because lime (stone)-gypsum method flue gas desulfurization is the common flue gas desulfurization technique of coal-burning power plant or coal-burned industrial boiler, this technology in the occupation rate in flue gas desulfurization market up to more than 85%.And in lime (stone)-gypsum wet, realize flue gas demercuration, only need in existing desulphurization system, add an akali sulphide pharmaceutical dissolution jar and material metering system, the akali sulphide of dissolving is mixed and gets final product by metering and lime (stone) desulfurization absorbent, method is simple, easy to operate, do not need existing desulfurization facility is carried out big transformation.
(2) the demercuration cost is lower.From operating cost: the producer price 2000-2500 per ton unit of akali sulphide at present, if calculate, suppose Hg in the flue gas by Containing Sulfur sodium about 60%
2+With Hg
0Ratio 1: 1, the utilization rate 50% of vulcanized sodium, whenever remove 1 ton of mercury in theory the consumption of akali sulphide be 1.95 tons, the demercuration expense is less than 5000 yuan, well below existing other demercuration method.
(3) can be to the environment structure secondary pollution.Because product is the unusual little mercuric sulphide (K of ionic product behind the demercuration
Sp 0(HgS))=4 * 10
-53, it is the compound at the most stable mercury of occurring in nature, even is not dissolved in hydrochloric acid and nitric acid, is difficult to take place migration and variation, therefore, also is difficult to the environment structure secondary pollution.
The specific embodiment
The present invention will be further described below in conjunction with embodiment, but the scope that protection scope of the present invention is not limited to represent among the embodiment.
Embodiment 1
The concentration of sulfur dioxide is 1300mg/Nm in the power plant soot fume of Guangdong
3, the content of total mercury is 11.1 μ g/Nm in the flue gas
3This factory utilizes lime (stone)-gypsum wet to carry out flue gas desulfurization, and desulfurization degree is at 87Wt.%.The Gas with Sodium Sulfide Solution that in lime (stone) circulation absorbent (being desulfurizing agent), adds the 3mol/L that accounts for its volume 1.5 ‰, mix the back and in the absorption tower, carry out desulfuration demercuration, in desulfurization degree was stabilized in the scope of 84-93%, total mercury content had only 2.3 μ g/Nm in the flue gas after the processing
3, the demercuration rate reaches 79.3%.It is lower to remove cost, easy to operate.And can be to the environment structure secondary pollution.
Embodiment 2
The concentration of sulfur dioxide is 95mg/Nm in industrial boiler factory, the Guangzhou coal-fired flue-gas
3, the content of total mercury is 14.8 μ g/Nm in the flue gas
3This factory adopts lime (stone)-gypsum wet to carry out flue gas desulfurization, and desulfurization degree is more than 85Wt.%.The Gas with Sodium Sulfide Solution that adds the 3mol/L of volume 4 ‰ in lime (stone) circulation absorbent mixes the back and carry out desulfuration demercuration in the absorption tower, and under desulfurization degree still was stabilized in condition more than 85%, total mercury content had only 3.2 μ g/Nm in the flue gas after the processing
3, the demercuration rate reaches 78.4%.It is lower to remove cost, easy to operate.And can be to the environment structure secondary pollution.
Embodiment 3
The concentration of sulfur dioxide is 1400mg/Nm in Shaoguan, Guangdong steam power plant coal-fired flue-gas
3, the content of total mercury is 17.9 μ g/Nm in the flue gas
3This factory utilizes lime (stone)-gypsum wet to carry out flue gas desulfurization, and desulfurization degree is on average 84%.The Gas with Sodium Sulfide Solution that in lime (stone) circulation absorbent, adds the 2.4mol/L of volume 9/10000ths, mix the back and in the absorption tower, carry out desulfuration demercuration, in desulfurization degree was stabilized in the scope of 81-87%, total mercury content had only 5.8 μ g/Nm in the flue gas after the processing
3, the demercuration rate reaches 67.6%.It is lower to remove cost, easy to operate.And can be to the environment structure secondary pollution.
Claims (6)
1. method that removes total mercury in the coal-fired flue-gas, it is characterized in that, after lime or limestone desulfurizer and akali sulphide mercury removal agent mixed, in lime-gypsum wet flue gas desulfurization or limestone-gypsum wet process of FGD process, the mixed solution that obtains after above-mentioned the mixing is sprayed in the desulfurizing tower, in flue gas desulfurization, total mercury removes in the realization flue gas.
2. the method that removes total mercury in the coal-fired flue-gas according to claim 1 is characterized in that it is 1-3mol.L that described akali sulphide mercury removal agent adopts concentration
-1The akali sulphide aqueous solution.
3. the method that removes total mercury in the coal-fired flue-gas according to claim 2, the addition that it is characterized in that the akali sulphide aqueous solution account for 5 percent to ten thousand of lime or limestone desulfurizer volume/.
4. the method that removes total mercury in the coal-fired flue-gas according to claim 3, it is characterized in that Gas with Sodium Sulfide Solution and lime or limestone desulfurizer mix after, control pH value is 5-6.5 when carrying out desulfuration demercuration.
5. the method that removes total mercury in the coal-fired flue-gas according to claim 1 is characterized in that Containing Sulfur sodium 54-60Wt.% in the described akali sulphide.
6. according to each described method that removes total mercury contaminants in the coal-fired flue-gas of claim 1～5, it is characterized in that the removal efficiency of described flue gas mercury is 65-85Wt.%.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104001709A (en) * | 2014-05-19 | 2014-08-27 | 上海大学 | Solidifying and stabilizing method of mercury in desulfurized gypsum by employing chemical bond phosphatic ceramic combined with sulfide |
| CN108889110A (en) * | 2018-08-08 | 2018-11-27 | 中国恩菲工程技术有限公司 | The method for removing hydrargyrum of flue gas |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1270077A (en) * | 1999-03-31 | 2000-10-18 | 麦克德莫技术股份有限公司 | Method for eliminating mercury from flue gas by using sulphureous gas and liquid |
| EP1213046A1 (en) * | 2000-12-05 | 2002-06-12 | THE BABCOCK & WILCOX COMPANY | Method for removing mercury from flue gas |
| CN1923337A (en) * | 2006-08-23 | 2007-03-07 | 浙江大学 | Boiler smoke gas multipollutant ozonization and simultaneous elimination device and method therefor |
-
2010
- 2010-05-25 CN CN 201010188844 patent/CN101850212A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1270077A (en) * | 1999-03-31 | 2000-10-18 | 麦克德莫技术股份有限公司 | Method for eliminating mercury from flue gas by using sulphureous gas and liquid |
| EP1213046A1 (en) * | 2000-12-05 | 2002-06-12 | THE BABCOCK & WILCOX COMPANY | Method for removing mercury from flue gas |
| CN1923337A (en) * | 2006-08-23 | 2007-03-07 | 浙江大学 | Boiler smoke gas multipollutant ozonization and simultaneous elimination device and method therefor |
Non-Patent Citations (1)
| Title |
|---|
| 《2004中国国际脱硫脱硝技术与设备展览会暨技术研讨会》 20041231 Greg Bielawski et al. 在石灰石强制氧化脱硫塔中SCR催化剂，喷氨和氢硫化钠对汞的物性和脱除效果的影响 第296页第6-9段，第297页第1段以及附图1 1-6 , 2 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104001709A (en) * | 2014-05-19 | 2014-08-27 | 上海大学 | Solidifying and stabilizing method of mercury in desulfurized gypsum by employing chemical bond phosphatic ceramic combined with sulfide |
| CN108889110A (en) * | 2018-08-08 | 2018-11-27 | 中国恩菲工程技术有限公司 | The method for removing hydrargyrum of flue gas |
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