CN102989305A - Method suitable for controlling mercury contamination in coal-fired power plants adopting wet-process flue gas desulfurization - Google Patents
Method suitable for controlling mercury contamination in coal-fired power plants adopting wet-process flue gas desulfurization Download PDFInfo
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- CN102989305A CN102989305A CN2012104842071A CN201210484207A CN102989305A CN 102989305 A CN102989305 A CN 102989305A CN 2012104842071 A CN2012104842071 A CN 2012104842071A CN 201210484207 A CN201210484207 A CN 201210484207A CN 102989305 A CN102989305 A CN 102989305A
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Abstract
The invention discloses a method suitable for controlling mercury contamination in coal-fired power plants adopting wet-process flue gas desulfurization. The method is characterized in that halide additive solution is added into a boiler body to participate in combustion reaction so as to promote oxidization of mercury in flue gas and improve the proportion of mercury oxide in the flue gas; and sulfur-contained additive solution enters a desulfurizing tower and reacts with the flue gas or mercury oxide in size to produce mercuric sulfide precipitation or flocculent complex, and finally mercury in the flue gas of the coal-fired power plants can be effectively removed, wherein a sulfur-contained additive solution storage tank is arranged on the side of a wet-process flue gas desulfurization system and communicated with at least one of a fresh size pipeline of a desulfurizing tower and an inlet and an outlet of a circulating pump of the desulfurizing tower. The method has the advantages of low investment and running cost of a mercury contamination control system while ensuring that the emission level of mercury contaminations in the coal-fired power plants meets stricter environmental protection standard requirements; and as the wet-process flue gas desulfurization system is widely adopted in the coal-fired power plants in China, the method is wide in applicability.
Description
Technical field
The present invention relates to the groundwater pollution control of coal-burning power plant, be specifically related to a kind of mercury pollution control method of coal-burning power plant of suitable employing wet process of FGD.
Background technology
Mercury is a kind of hypertoxicity material, but has the characteristics such as persistence, biological accumulation, genetoxic long-distance transmissions, can produce long-term and serious harm to environment, human body.As a kind of trace element in the coal, mercury is in coal-fired process, and most of meeting is along with flue gas enters atmosphere.Although the mercury mass concentration in the coal-fired plant flue gas is very low, only be about 1～20 μ g/m
3, but its total amount is huge.According to the data of U.S. environment administration, 1/3 mercury is arranged approximately from the coal combustion of coal-burning power plant in U.S.'s atmospheric environment, occupy first in artificial mercury emissions source.And Chinese as consumption of coal big country, the mercury emissions that causes in the coal-fired process and pollution thereof are severeer.Therefore, China is listed mercury pollution control work in " Heavy Metal Pollution " 12 " planning ", and the mercury and mercuric compounds that has tentatively proposed coal-burning power plant's discharging must be lower than 0.03mg/m
3The emission limit set requirement.
Coal-burning power plant's mercury emissions monitoring and the Transport result of study of carrying out both at home and abroad show that the mercury in coal-burning power plant's discharging flue gas can be divided three classes: Elemental Mercury, mercury oxide, particle mercury.Experimental study shows: the ratio of the Elemental Mercury in the flue gas, relevant with the content of the elements such as chlorine, bromine, calcium, iron in the coal, especially when content of halogen was low, the ratio of Elemental Mercury was high in the flue gas.Dust pelletizing system can remove the particle mercury of the overwhelming majority, but limited to the removal effect of Elemental Mercury and mercury oxide, and the being proportionate property of ratio of the ratio of particle mercury and mercury oxide.Wet desulfurization system can be realized efficiently removing of mercury oxide, but Elemental Mercury is not almost had removal effect.Denitrating system can make the Elemental Mercury oxidation in the flue gas, but when content of halogen was low in the flue gas, oxidation effectiveness was poor.
For the These characteristics of coal-burning power plant's mercury emissions, and the practice by for many years, the developed countries such as the U.S. have formed the main mercury pollution control technology of two classes, and a class is absorption demercuration technology, and a class is collaborative demercuration technology.
Absorption demercuration technology is to utilize the adsorbent such as active carbon, and the mercury in the flue gas is carried out adsorbing and removing.Patent adsorbent and the corresponding demercuration method of mercury in flue gas " be used for remove " (patent No. CN03816017.X) discloses the preparation method of the Powdered bromination active carbon of high-efficiency mercury removal special use, and adsorbent is sprayed into the method that realizes mercury pollution control behind the air preheater.The main feature of absorption demercuration technology is wide adaptability, but investment and operating cost are high, and power plant generally is difficult to bear.The patent " a kind of dedusting demercuration flue gas purification system " that the inventor proposed in 2011 (application number: 201120432081.4) announced a kind of absorption demercuration system through optimizing, on the basis that utilizes electrostatic precipitation and bag-type dust realization high-effective dust-removing, constantly circulate in the bag-type dust district by adsorbent, can obtain very high demercuration efficient.
Collaborative demercuration technology then is to utilize the existing flue gas purifying equipment of power plant, when realizing desulphurization and denitration, dedusting, realizes collaborative demercuration.The main feature of this technology is that investment and operating cost are lower, but demercuration efficient has been subject to the restriction of flue gas purification system and coal.
Ended for the end of the year 2009, in China coal-burning power plant, 100% cleaner is installed, and the unit that has a desulphurization system accounts for 71% of thermoelectricity installed capacity, the unit that has denitrating system accounts for 6.7% of thermoelectricity installed capacity, and will keep rapid growth.Consider that simultaneously working in coordination with the demercuration technology compares with low cost with absorption demercuration technology, therefore, take full advantage of existing flue gas purification system, exploitation can improve the technical matters of collaborative demercuration efficient, be the mercury pollution control technology that is suitable for China coal-burning power plant, have very important significance.
The patent " a kind of coal-burning power plant's mercury pollution control method of high efficiency, low cost " that the inventor proposed in 2011 (application number: 201120356783.9) announced a kind of utilization and in wind-heat wind pipeline, Secondary Air hot air duct, coal handling system or a feeder, added halide additive solution, with the oxidation of promotion mercury, thereby utilize existing flue gas purification system to reduce the system of mercury in flue gas discharging.For the coal-burning power plant that is provided with wet method fume desulfurizing system, although this system is expected to obtain higher demercuration efficient, but, the mercury oxide that is absorbed by wet method fume desulfurizing system, substantially be present in the middle of the desulfurization slurry, and unstable, when the desulphurization system operation fluctuation or mercury in flue gas content occur when higher, these are desulfurized the probably again release of mercury oxide that slurries absorb, and cause secondary pollution.
Summary of the invention
In order to overcome the shortcoming of above-mentioned prior art, the object of the present invention is to provide a kind of mercury pollution control method of coal-burning power plant, have the advantages that demercuration efficient is high, cost is low, equipment is simple, easy to operate.
In order to achieve the above object, technical scheme of the present invention is:
A kind of mercury pollution control method of coal-burning power plant of suitable employing wet process of FGD, comprise the steps: in the middle of the sulfur-containing additive solution adding wet desulfurization system 13, react with the mercury oxide in flue gas or the slurries, generate mercuric sulphide precipitation or cotton-shaped complex compound, realize effectively removing of mercury oxide in the coal-fired plant flue gas, described sulfur-containing additive is selected from the mixture of vulcanized sodium, NaHS, organic sulfur TMT15 or its arbitrary proportion; The concentration range of described sulfur-containing additive solution is 0.1-1000mmol/L; Described sulfur-containing additive addition is 0.1 * 10 with the ratio of mark attitude exhaust gas volumn
-6-1000 * 10
-6G/Nm
3
Described sulfur-containing additive addition is preferably 10 * 10 with the ratio of mark attitude exhaust gas volumn
-6-100 * 10
-6G/Nm
3
The concentration range of described sulfur-containing additive solution is preferably 50-500mmol/L, 100-400mmol/L more preferably, also 200-300mmol/L more preferably.
Mercury pollution control method based on the coal-burning power plant of above-mentioned a kind of suitable employing wet process of FGD, halide additive solution is added boiler body 4 participate in combustion reaction, the Elemental Mercury that promotes the boiler combustion reaction to generate is oxidized to divalence mercury, thereby improve the demercuration effect that adds sulfur-containing additive in wet desulfurization system 13, the concentration range of described halide additive solution is 0.1-20mol/L; The ratio of described halide additive addition and coal-supplying amount is 1-5000ppm, and described halide additive is villaumite, bromine salt, salt compounded of iodine or their mixture or the mixture that contains them.
The concentration preferable range of described halide additive solution is 2-15mol/L.
The ratio of described halide additive addition and coal-supplying amount is preferably 50-500ppm.
Mercury pollution control method based on the coal-burning power plant of above-mentioned a kind of suitable employing wet process of FGD, also comprise the sulfur-containing additive solution in the sulfur-containing additive fluid reservoir 17 is joined in the fresh slurries pipeline 14 of wet desulfurization system 13, make the mercury oxide generation liquid phase reactor in the slurries in sulfur-containing additive solution and the wet desulfurization system 13.
Mercury pollution control method based on the coal-burning power plant of above-mentioned a kind of suitable employing wet process of FGD, also comprise the gateway that the sulfur-containing additive solution in the sulfur-containing additive fluid reservoir 17 is joined the circulating pump 16 of wet desulfurization system 13, make sulfur-containing additive solution enter wet desulfurization system 13 inner and upper and spray downwards, thus with flue gas in mercury oxide generation gas-liquid two-phase reaction.
Mercury pollution control method based on the coal-burning power plant of above-mentioned a kind of suitable employing wet process of FGD, also comprise the sulfur-containing additive solution in the sulfur-containing additive fluid reservoir 17 is joined in the desulfurization waste liquor pipeline 15 of wet desulfurization system 13, mercury oxide in sulfur-containing additive solution and the desulfurization wastewater is reacted, realize the qualified discharge of mercury in the desulfurization waste liquor.
Mercury pollution control method based on above-mentioned a kind of coal-burning power plant, also comprise the halide additive solution in the halide additive fluid reservoir 3 is injected in the middle of wind-heat wind pipeline 7, Secondary Air hot air duct 5, coal handling system 1 or the feeder 2, after mixing, enter boiler body 4 and participate in burning, thereby promote the oxidation of mercury.
Above steps of the present invention can be used simultaneously, does not have sequencing.
Compared with prior art, advantage of the present invention is:
1) low for content of halogen in China's coal, thereby cause the high characteristics of Elemental Mercury content in the flue gas, by in coal and/or combustion air, adding halide additive, make halide enter uniformly burner hearth and participate in burning, can effectively increase the ratio of mercury oxide in the flue gas, thereby be expected to utilize the wet method fume desulfurizing system of coal-burning power plant to obtain higher demercuration efficient.
2) for fluctuation or mercury in flue gas content occurring when wet desulfurization system operation when higher, the mercury oxide that is desulfurized the slurries absorption may discharge, cause the problem of secondary pollution again, in wet desulfurization system, add sulfur-containing additive solution, form stable sediment, thereby this system of utility can obtain higher demercuration efficient.
3) this method only need add a small amount of comparatively cheap additive and can realize efficient mercury pollution control, and medicine machine is simple, and cost of investment and operating cost are all well below absorption demercuration technology.
4) this method is actual has set forth multiple halide additive and has added mode.Wherein, in coal handling system, add additive if adopt, have the advantage that system is simple, medicine system is few, but time-delay is longer; Add additive if adopt in feeder or coal pulverizer, the short operation of then delaying time is convenient, but medicine system quantity is more; Add additive if adopt in first and second hot blast, then the simple quantity of equipment is few, and easy to operate time-delay is short.
5) this method is actual has set forth multiple sulfur-containing additive and has added mode.Wherein, in fresh slurries, add sulfur-containing additive, be conducive to promote that the mercury oxide and the additive reaction that absorb in the desulfurization slurry form settlement thing or cotton-shaped complex compound; And add sulfur-containing additive toward the circulating pump gateway, then be conducive to promote the mercury oxide and additive reaction formation settlement thing or cotton-shaped complex compound that absorb in mercury oxide in the flue gas and the loop slurry, thereby more improved demercuration efficient.
Description of drawings
Fig. 1 is the operation principle structural representation of embodiments of the invention 1, adds sodium hydrosulfide in wet method fume desulfurizing system circulating-pump outlet and fresh slurries, and add calcium bromide solution in feeder.
Fig. 2 is the operation principle structural representation of embodiments of the invention 2, adds sodium sulfide solution in the wet method fume desulfurizing system pump entry.
Fig. 3 is the operation principle structural representation of embodiments of the invention 3, in wet method fume desulfurizing system pump entry, fresh slurries and desulfurization wastewater, add organic sulfur (TMT15) solution, and add the mixed solution of calcium bromide and calcium chloride in wind-heat wind pipeline.
The specific embodiment
Below in conjunction with drawings and Examples the present invention is described in further detail.But it will be appreciated by those skilled in the art that described embodiment is not limitation of the present invention, any improvement that the present invention is made and changing all within protection scope of the present invention.
Mercury pollution control method based on above-mentioned a kind of coal-burning power plant, the apparatus structure that is suitable for is: the outlet of coal handling system 1 links to each other with the import of feeder 2, the outlet of feeder 2 is connected with the import of coal pulverizer 6, coal pulverizer 6 is connected with boiler body 4, on the path between the outlet of boiler body 4 and the air preheater 11 denitrating system 10 is set, air preheater 11 links to each other with boiler body 4 imports by Secondary Air heat pipe 5, air preheater 11 links to each other with the import of coal pulverizer 6 by a wind-heat pipe 7, air preheater 11 is connected with overfire air fan 9 with primary air fan 8, deduster 12 is set behind the air preheater 11, wet desulfurization system 13 is set behind the deduster 12, wet desulfurization system 13 rear connection cigarette towers 18, described wet desulfurization system 13 comprises the fresh slurries pipeline 14 of a side; The bottom is provided with desulfurization waste liquor pipeline 15; Between bottom and the top circulating pump 16 is set.
The outlet of described fresh slurries pipeline 14 and circulating pump 16 all is connected with sulfur-containing additive fluid reservoir 17, and feeder 2 is connected with halide additive fluid reservoir 3.
The entrance of described circulating pump 16 is connected with sulfur-containing additive fluid reservoir 17.
A described wind-heat wind pipeline 7 is connected with halide additive fluid reservoir 3, and the outlet that fresh slurries pipeline 14, desulfurization waste liquor pipeline 15 are connected with circulating pump all is connected with sulfur-containing additive fluid reservoir 17.
Embodiment one
As shown in Figure 1, be suitable for being provided with the mercury pollution control method of the coal-burning power plant of wet method fume desulfurizing system, halide additive fluid reservoir 3 is connected with feeder 2, and feeder 2 is connected with coal pulverizer 6; Sulfur-containing additive fluid reservoir 17 is connected with the outlet of fresh slurries pipeline 14 and circulating pump 16.Its method that realizes mercury pollution control is as follows: the halide additive that adopts is selected calcium bromide, after being formulated into the homogeneous solution of 4mol/L, be added in the feeder 2, then bring boiler body 4 into via coal pulverizer and participate in burning, promote the oxidation of the mercury in the flue gas; The sulfur-containing additive that adopts is selected NaHS, after being formulated into the homogeneous solution of 0.1mol/L, be added in the fresh slurries pipeline 14 and the outlet of circulating pump 16, respectively with desulfurization slurry and flue gas in mercury oxide react, generate stable mercuric sulphide precipitation, thereby guarantee to realize effectively removing of mercury oxide, make the gas mercury content in the chimney 18 reach emission request.The ratio 100ppm of calcium chloride addition and coal-supplying amount, the NaHS addition is 5 * 10 with the ratio of mark attitude exhaust gas volumn
-5G/Nm
3
In the present embodiment, by adding the calcium bromide additive, can be so that the Elemental Mercury more than 85% be oxidized; And then by in wet desulfurization system, adding the NaHS additive, the mercury oxide more than 90% can both effectively be removed.Therefore when adopting this system, whole demercuration efficient can be stablized and reaches more than 85%.
Embodiment 2
As shown in Figure 2, be suitable for being provided with the mercury pollution control method of the coal-burning power plant of wet method fume desulfurizing system, sulfur-containing additive fluid reservoir 17 is connected with the entrance of circulating pump 16.Its method that realizes mercury pollution control is as follows: the sulfur-containing additive that adopts is selected vulcanized sodium, after being formulated into the homogeneous solution of 0.2mol/L, be added into the entrance of circulating pump 16, thereby react with the mercury oxide in loop slurry and the flue gas, generate stable mercuric sulphide precipitation, thereby guarantee to realize effectively removing of mercury oxide, make the gas mercury content in the chimney 18 reach emission request.The vulcanized sodium addition is 1 * 10 with the ratio of mark attitude exhaust gas volumn
-5G/Nm
3
In the present embodiment, by in wet desulfurization system, adding the vulcanized sodium additive, the mercury oxide more than 90% can both effectively be removed.Therefore this system is suitable for the higher power plant of divalence mercury ratio in the flue gas, can obtain higher demercuration efficient; And for the lower power plant of divalence mercury ratio in the flue gas, demercuration efficient is lower.
Embodiment 3
As shown in Figure 3, be suitable for being provided with the mercury pollution control method of the coal-burning power plant of wet method fume desulfurizing system, halide additive fluid reservoir 3 is connected with a wind-heat wind pipeline 7, and one time wind-heat wind pipeline 7 is connected with coal pulverizer 6; Sulfur-containing additive fluid reservoir 17 is connected with fresh slurries pipeline 14, desulfurization waste liquor pipeline 15 and the outlet of circulating pump 16.Its method that realizes mercury pollution control is as follows: the halide additive that adopts is selected the mixed solution of calcium bromide and calcium chloride, calcium bromide concentration is 3mol/L, calcium chloride concentration is 5mol/L, from halide additive fluid reservoir 3, add in wind-heat wind pipeline 7, bring boiler body 4 into by a wind and participate in burning, promote the oxidation of the mercury in the flue gas; The sulfur-containing additive that adopts is selected organic sulfur (TMT15), after being formulated into the homogeneous solution of 0.05mol/L, be added in the fresh slurries pipeline 14 and the outlet of circulating pump 16, respectively with desulfurization slurry and flue gas in mercury oxide react, generate stable cotton-shaped complex compound, thereby guarantee to realize effectively removing of mercury oxide, make the gas mercury content in the chimney 18 reach emission request; In addition, organic sulfur (TMT15) also is added in the middle of the desulfurization waste liquor pipeline 15, with the desulfurization waste liquor reaction, makes the mercury emissions of desulfurization waste liquor up to standard.The ratio of calcium bromide and a wind air quantity of standard is 30mg/Nm
3, the ratio of calcium chloride and a wind air quantity of standard is about 28mg/Nm
3, the amount of the organic sulfur (TMT15) of adding is 2 * 10 with the ratio of mark attitude exhaust gas volumn in fresh slurries pipeline 14 and in the circulating pump 16
-5G/Nm
3, the concentration that joins the organic sulfur (TMT15) in the desulfurization waste liquor is 20ppm.
In the present embodiment, by adding the additive package of calcium bromide and calcium chloride, can be so that the Elemental Mercury more than 85% be oxidized; And then by in wet desulfurization system, adding organic sulfur (TMT15) additive, the mercury oxide more than 90% can both effectively be removed.Therefore when adopting this system, whole demercuration efficient can be stablized and reaches more than 85%.
In the accompanying drawing: 1 is coal handling system; 2 is feeder; 3 is the halide additive fluid reservoir; 4 is boiler body; 5 is the Secondary Air hot air duct; 6 is coal pulverizer; 7 is a wind-heat wind pipeline; 8 is primary air fan; 9 is overfire air fan; 10 is denitrating system; 11 is air preheater; 12 is deduster; 13 is wet desulfurization system; 14 is fresh slurries pipeline; 15 is the desulfurization waste liquor pipeline; 16 is circulating pump; 17 is the sulfur-containing additive fluid reservoir; 18 is chimney.
Claims (6)
1. mercury pollution control method that be fit to adopt the coal-burning power plant of wet process of FGD, it is characterized in that, comprise the steps: sulfur-containing additive solution is entered in the middle of the wet desulfurization system (13), react with the mercury oxide in flue gas or the slurries, generate mercuric sulphide precipitation or cotton-shaped complex compound, realize effectively removing of mercury oxide in the coal-fired plant flue gas, described sulfur-containing additive is selected from the mixture of vulcanized sodium, NaHS, organic sulfur TMT15 or its arbitrary proportion; The concentration range of described sulfur-containing additive solution is 0.1-1000mmol/L; Described sulfur-containing additive addition is 0.1 * 10 with the ratio of mark attitude exhaust gas volumn
-6-1000 * 10
-6G/Nm
3
2. based on the mercury pollution control method of above-mentioned a kind of coal-burning power plant, it is characterized in that, halide additive solution is entered boiler body (4) participate in combustion reaction, the Elemental Mercury that promotes the boiler combustion reaction to generate is oxidized to divalence mercury, thereby improve the demercuration effect that adds sulfur-containing additive in wet desulfurization system (13), the concentration range of described halide additive solution is 0.1-20mol/L; The ratio of described halide additive addition and coal-supplying amount is 1-5000ppm, and described halide additive is villaumite, bromine salt, salt compounded of iodine or their mixture or the mixture that contains them.
3. based on the mercury pollution control method of above-mentioned a kind of coal-burning power plant, it is characterized in that, also comprise the sulfur-containing additive solution in the sulfur-containing additive fluid reservoir (17) is joined in the fresh slurries pipeline (14) of wet desulfurization system (13), make the mercury oxide generation liquid phase reactor in the slurries in sulfur-containing additive solution and the wet desulfurization system (13).
4. based on the mercury pollution control method of above-mentioned a kind of coal-burning power plant, it is characterized in that, also comprise the gateway that the sulfur-containing additive solution in the sulfur-containing additive fluid reservoir (17) is joined the circulating pump (16) of wet desulfurization system (13), make sulfur-containing additive solution enter wet desulfurization system (13) inner and upper and spray downwards, thus with flue gas in mercury oxide generation gas-liquid two-phase reaction.
5. based on the mercury pollution control method of above-mentioned a kind of coal-burning power plant, it is characterized in that, also comprise the sulfur-containing additive solution in the sulfur-containing additive fluid reservoir (17) is joined in the desulfurization waste liquor pipeline (15) of wet desulfurization system (13), mercury oxide in sulfur-containing additive solution and the desulfurization wastewater is reacted, realize the qualified discharge of mercury in the desulfurization waste liquor.
6. based on the mercury pollution control method of above-mentioned a kind of coal-burning power plant, it is characterized in that, also comprise the halide additive solution in the halide additive fluid reservoir (3) is injected in the middle of a wind-heat wind pipeline (7), Secondary Air hot air duct (5), coal handling system (1) or the feeder (2), after mixing, enter boiler body (4) and participate in burning, thereby promote the oxidation of mercury.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103285720A (en) * | 2013-07-02 | 2013-09-11 | 中国环境科学研究院 | Method and device for removing mercury in flue gas by utilizing organic wastes |
| CN105381698A (en) * | 2015-10-26 | 2016-03-09 | 中电投远达环保工程有限公司 | Mercury curing and removing method for coal-fired power plant and device thereof |
| CN106731559A (en) * | 2015-11-23 | 2017-05-31 | 中国铝业股份有限公司 | A kind of mercury fume wet method mercury removal agent and demercuration method |
| US9797598B1 (en) | 2015-03-25 | 2017-10-24 | Great River Energy | Method for controlling gaseous mercury emission between two or more coal-fired combustion units |
| CN112023654A (en) * | 2020-07-10 | 2020-12-04 | 中南大学 | Method for purifying elemental mercury in flue gas by using organic sulfide |
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| CN102343200A (en) * | 2011-09-21 | 2012-02-08 | 中国华能集团清洁能源技术研究院有限公司 | Method and system for efficiently controlling mercury pollution of coal-fired power plant at low cost |
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| CN1895745A (en) * | 2006-06-29 | 2007-01-17 | 上海交通大学 | Mercury removal for smoke desulfurizing system by fortified wetting method |
| CN102343200A (en) * | 2011-09-21 | 2012-02-08 | 中国华能集团清洁能源技术研究院有限公司 | Method and system for efficiently controlling mercury pollution of coal-fired power plant at low cost |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103285720A (en) * | 2013-07-02 | 2013-09-11 | 中国环境科学研究院 | Method and device for removing mercury in flue gas by utilizing organic wastes |
| US9797598B1 (en) | 2015-03-25 | 2017-10-24 | Great River Energy | Method for controlling gaseous mercury emission between two or more coal-fired combustion units |
| CN105381698A (en) * | 2015-10-26 | 2016-03-09 | 中电投远达环保工程有限公司 | Mercury curing and removing method for coal-fired power plant and device thereof |
| CN106731559A (en) * | 2015-11-23 | 2017-05-31 | 中国铝业股份有限公司 | A kind of mercury fume wet method mercury removal agent and demercuration method |
| CN106731559B (en) * | 2015-11-23 | 2020-06-23 | 中国铝业股份有限公司 | Mercury-containing flue gas wet-process mercury removal agent and mercury removal method |
| CN112023654A (en) * | 2020-07-10 | 2020-12-04 | 中南大学 | Method for purifying elemental mercury in flue gas by using organic sulfide |
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Application publication date: 20130327 |