CN108889110A - The method for removing hydrargyrum of flue gas - Google Patents
The method for removing hydrargyrum of flue gas Download PDFInfo
- Publication number
- CN108889110A CN108889110A CN201810897328.6A CN201810897328A CN108889110A CN 108889110 A CN108889110 A CN 108889110A CN 201810897328 A CN201810897328 A CN 201810897328A CN 108889110 A CN108889110 A CN 108889110A
- Authority
- CN
- China
- Prior art keywords
- mercury
- flue gas
- removal
- reagent
- simple substance
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/77—Liquid phase processes
- B01D53/79—Injecting reactants
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
- B01D53/501—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
- B01D53/502—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound characterised by a specific solution or suspension
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
- B01D53/507—Sulfur oxides by treating the gases with other liquids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/64—Heavy metals or compounds thereof, e.g. mercury
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/30—Alkali metal compounds
- B01D2251/304—Alkali metal compounds of sodium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/40—Alkaline earth metal or magnesium compounds
- B01D2251/404—Alkaline earth metal or magnesium compounds of calcium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/60—Inorganic bases or salts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/60—Inorganic bases or salts
- B01D2251/608—Sulfates
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/60—Heavy metals or heavy metal compounds
- B01D2257/602—Mercury or mercury compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Treating Waste Gases (AREA)
Abstract
The present invention provides a kind of method for removing hydrargyrum of flue gas.The method for removing hydrargyrum includes the following steps：Removal of mercury processing is carried out to flue gas using mercury-removing reagent, during removal of mercury processing, mercury-removing reagent is reacted with the sulfur dioxide in flue gas generates sulphur simple substance, handles the mercury in flue gas by sulphur simple substance.The sulphur simple substance of the high high activity of the dispersion degree generated in the reaction process of sulfur dioxide in above-mentioned mercury-removing reagent and flue gas, it can more effectively react to form mercuric sulphide to removal system with the gaseous mercury in flue gas, and reacting the extra sulphur simple substance formed also can be with product mercuric sulphide discharge system.In this way, not only contributing to carry out demercuration to flue gas, the presence of extra sulphur simple substance also avoids the concentration excess of hydrogen sulfide, negatively affects caused by subsequent sulphuric acid system so as to avoid the hydrogen sulfide of concentration excess.
Description
Technical field
The present invention relates to fume mercury-removing technical fields, in particular to a kind of method for removing hydrargyrum of flue gas.
Background technique
Mainly there are chloridising, activated carbon method, sodium sulfide method, selenium filtration method, sulfuric acid scrubbing using fume mercury-removing technology at present
Method, potassium iodide method, Ozone, SCR method etc., under different flue gas conditions.Wherein chloridising, iodine complexing-electrolysis method, sulfuric acid
Washing method, sodium sulfide method are used for Flue Gas of Nonferrous Smelting.The main application characteristic of main flue gas method for removing hydrargyrum is as follows：
1. chloridising：Also referred to as Boliden-Norzink demercuration method, being generalized to China earliest is Boliden company.It is this
Method can produce calomel or electrolysis obtains mercury simple substance for removing gaseous nonvalent mercury in flue gas during smelting.Both products are not
It is enough to stablize, it cannot function as end-products processing, it is necessary to be further processed into other products.And mercury downstream application in the industry at present
It is fewer and fewer, limit the application of the method.
The main chemical reactions that removal of mercury process occurs are as follows：
Hg0+HgCl2→Hg2Cl2↓ (calomel) (absorbs process)
Hg2Cl2+Cl2→2HgCl2(chloride process)
HgCl2→Hg+Cl2(electrowinning process)
If byproduct is calomel, produces no electrolytic process and largely consume chlorine.
2. activated carbon method：Active carbon adsorption is used primarily for the discharge of the mercury of waste incineration.Since active carbon is to many acid
Property gas have very strong adsorptivity, therefore be unable to selective removal gas mercury, make using having certain limitation.
3. potassium iodide method：Potassium iodide method is the flue gas during smelting method for removing hydrargyrum of Guangdong Shaoguan Smelter invention, and is applied to this
Factory.But liquor kalii iodide cost is high, therefore this method is not promoted and applied in other factories.
Removal of mercury process main chemical reactions equation is as follows：
H2SO3+2Hg0(gaseous state)+4H++8I-→2[HgI4]2-+S↓+3H2O (absorbs process)
[HgI4]2-→Hg0(liquid)+I2+2I-(electrowinning process)
I2+H2SO3+H2O→2HI+H2SO4
The processing main chemical reactions equation of absorption cycle mother liquor is as follows：
3Hg+8HNO3→3Hg(NO3)2+2NO↑+4H2O (mercuric nitrate preparation)
K2[HgI4]+Hg(NO3)2=2HgI2↓+2KNO3(precipitating mercuric iodixde)
HgI2+2I-=[HgI4]2-(dissolution mercuric iodixde)
4. selenium filtration method：This method utilizes the Hg in the compatibility removing flue gas between Hg and Se0.Since HgSe is to stablize
Compound can be used as final product landfill.But this method cost is high, is chiefly used in the removal of Trace Mercury in flue gas.
Removal of mercury process chemistry reaction equation is as follows：
Hg+Se→HgSe
5. sodium sulfide method：The technology is Japan's exploitation, can remove the Hg simple substance and Hg in flue gas2+.The spray of sodium sulfide solution
Enter difficult quantitation, vulcanized sodium, which sprays into the hydrogen sulfide excessively generated, has adverse effect to sulfate system conversion process is smelted.Therefore more
For flue gas during smelting system for preparing sulfuric acid as the chloridising removal of mercury, the pretreatment of potassium iodide removal of mercury technology.
Removal of mercury process main chemical reactions equation is as follows：
Na2S+SO2(gaseous state, or be CO2)+H2O→Na2SO3(or be Na2CO3)+H2S (acidification)
2Hg0(gaseous state)+2H2S+O2→2HgS+2H2O (removal Hg0)
Hg2++H2S→HgS+2H+(removal Hg2+)
The major defect of existing fume mercury-removing technology can be divided into following a few classes：Fume mercury-removing effect is obvious, but cannot fit
Complicated system is answered, removal of mercury poor selectivity limits the application range of removal of mercury technology, such as：Activated carbon method, Ozone.Flue gas
The absorbent of the removal of mercury is at high cost, such as：Potassium iodide method, selenium filtration method.The by-product that fume mercury-removing obtains does not obtain stable
Compound will be also further processed.If the application of the technology is limited without downstream industry cooperation, such as：Chloridising.It removes
If the control of mercury process is improper side effect to production procedure, therefore not can be carried out the depth removal of mercury, through being removed in advance frequently as one kind
Mercury measure, such as：Sodium sulfide method.
Therefore, at present using vulcanized sodium as mercury-removing reagent, it is chiefly used in flue gas during smelting system for preparing sulfuric acid as chloridising, iodate
The pretreatment of potassium method removal of mercury technology.It is difficult quantitatively however, the penetrating of sodium sulfide solution has, it is easy to excessive problem.Vulcanization
Sodium, which sprays into the hydrogen sulfide excessively generated, has adverse effect to sulfate system conversion process, generates water, oxidation process acutely locally surpasses
Temperature etc..
Summary of the invention
The main purpose of the present invention is to provide a kind of method for removing hydrargyrum of flue gas, to solve to use vulcanized sodium in the prior art
The problem of adverse effect is caused to sulfate system conversion process as mercury-removing reagent excess hydrogen sulfide easily generated.
To achieve the goals above, according to an aspect of the invention, there is provided a kind of method for removing hydrargyrum of flue gas, including with
Lower step：Removal of mercury processing is carried out to flue gas using mercury-removing reagent, mercury-removing reagent is can to react to generate sulphur with the sulfur dioxide in flue gas
The reagent of simple substance.
Further, mercury-removing reagent includes that polysulfide, thiosulfate and organic sulfur compound are any one or more of.
Further, polysulfide includes Na2SXOr CaSX, x=1-6.
Further, organic sulfur compound includes ethyl mercaptan, sodium dimethyl dithiocarbamate and sodium dimercaptopropane sulfonate
It is any one or more of.
Further, the concentration of mercury in flue gas is 10~800mg/Nm3。
Further, the temperature of removal of mercury processing is 25~200 DEG C.
Further, in the step of removal of mercury is handled, mercury-removing reagent dissolution is first configured to removal of mercury agent solution in a solvent, then will
The penetrating of removal of mercury agent solution is connected in the reactor of flue gas to carry out removal of mercury processing, the preferably way of contact of flue gas and removal of mercury agent solution
For fair current.
Further, the weight concentration of mercury-removing reagent is 5~25% in removal of mercury agent solution.
Further, the penetrating pressure of removal of mercury agent solution is 0.3~1.0MPa.
Further, the flow velocity of flue gas is 2~8m/s.
Further, compressed air is also connected in reactor, the pressure of preferred compressed air is 0.6~1.2MPa.
It applies the technical scheme of the present invention, provides a kind of method for removing hydrargyrum of flue gas, this method is using mercury-removing reagent to flue gas
Removal of mercury processing is carried out, during removal of mercury processing, mercury-removing reagent is reacted with the sulfur dioxide in flue gas generates sulphur simple substance, passes through sulphur
Simple substance handles the mercury in flue gas.The high height of the dispersion degree generated in the reaction process of sulfur dioxide in above-mentioned mercury-removing reagent and flue gas
Active sulphur simple substance can more effectively react to form mercuric sulphide to removal system with the gaseous mercury in flue gas, and instead
The extra sulphur simple substance that should be formed also can be with product mercuric sulphide discharge system.In this way, not only contribute to carry out demercuration to flue gas,
The presence of extra sulphur simple substance also avoids the concentration excess of hydrogen sulfide, so as to avoid concentration excess hydrogen sulfide to subsequent sulphuric acid
It is negatively affected caused by system.
Detailed description of the invention
The Figure of description for constituting a part of the invention is used to provide further understanding of the present invention, and of the invention shows
Examples and descriptions thereof are used to explain the present invention for meaning property, does not constitute improper limitations of the present invention.In the accompanying drawings：
Fig. 1 shows a kind of structural schematic diagram of the mercury removal device of flue gas provided by the present invention；And
Fig. 2 shows the overlooking structure diagrams of impeller guide plate in mercury removal device shown in FIG. 1.
Wherein, above-mentioned attached drawing includes the following drawings label：
10, reactor body；110, exhaust gases passes；20, injector；30, impeller guide plate；310, guide vane；40, solid
Body collection device；50, flusher.
Specific embodiment
It should be noted that in the absence of conflict, the feature in embodiment and embodiment in the present invention can phase
Mutually combination.The present invention will be described in detail below with reference to the accompanying drawings and embodiments.
In order to enable those skilled in the art to better understand the solution of the present invention, below in conjunction in the embodiment of the present invention
Attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is only
The embodiment of a part of the invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill people
The model that the present invention protects all should belong in member's every other embodiment obtained without making creative work
It encloses.
It should be noted that description and claims of this specification and term " first " in above-mentioned attached drawing, "
Two " etc. be to be used to distinguish similar objects, without being used to describe a particular order or precedence order.It should be understood that using in this way
Data be interchangeable under appropriate circumstances, so as to the embodiment of the present invention described herein.In addition, term " includes " and " tool
Have " and their any deformation, it is intended that cover it is non-exclusive include, for example, containing a series of steps or units
Process, method, system, product or equipment those of are not necessarily limited to be clearly listed step or unit, but may include without clear
Other step or units listing to Chu or intrinsic for these process, methods, product or equipment.
As described in background technique, in the prior art using vulcanized sodium as mercury-removing reagent excess hydrogen sulfide easily generated
Adverse effect is caused to sulfate system conversion process.Present inventor studies regarding to the issue above, proposes one kind
The method for removing hydrargyrum of flue gas, includes the following steps：Removal of mercury processing is carried out to flue gas using mercury-removing reagent, which is can be with flue gas
In sulfur dioxide reaction generate sulphur simple substance reagent.It is preferred that the sulphur simple substance generated during above-mentioned removal of mercury processing is compared to cigarette
Mercury in gas is excessive.
Since above-mentioned method for removing hydrargyrum of the invention carries out removal of mercury processing to flue gas using mercury-removing reagent, in the process of removal of mercury processing
In, the sulphur simple substance of the high high activity of the dispersion degree generated in the reaction process of the sulfur dioxide in mercury-removing reagent and flue gas, Ke Yigeng
It effectively reacts to form mercuric sulphide to removal system with the gaseous mercury in flue gas, and reacts the extra sulphur simple substance formed
It also can be with product mercuric sulphide discharge system.In this way, not only contributing to carry out demercuration to flue gas, the presence of extra sulphur simple substance is also kept away
The concentration excess of hydrogen sulfide is exempted from, has been negatively affected caused by subsequent sulphuric acid system so as to avoid the hydrogen sulfide of concentration excess.
The illustrative embodiments of the method for removing hydrargyrum of the flue gas provided according to the present invention are provided.So
And these illustrative embodiments can be implemented by many different forms, and should not be construed to be limited solely to here
The embodiment illustrated.It should be understood that thesing embodiments are provided so that disclosure herein is thorough and complete
It is whole, and the design of these illustrative embodiments is fully conveyed to those of ordinary skill in the art.
Using mercury-removing reagent to flue gas carry out removal of mercury processing, the removal of mercury processing during, by the type to mercury-removing reagent into
Row Rational choice reacts mercury-removing reagent with the sulfur dioxide in flue gas and generates sulphur simple substance, during the removal of mercury, sulphur simple substance and flue gas
In mercury chemically react, while the hydrogen sulfide in flue gas is chemically reacted with mercury, to realize the removal to mercury.
Above-mentioned removal of mercury process main chemical reactions equation is as follows：
2Hg0(gaseous state)+2H2S+O2→2HgS+2H2O
Hg0(gaseous state)+S → HgS
In a preferred embodiment, above-mentioned mercury-removing reagent includes polysulfide, thiosulfate and organic sulfur compound
Any one or more of, above-mentioned thiosulfate is preferably sodium thiosulfate.Above-mentioned mercury-removing reagent may include polysulfide, sulphur
Any two or three in thiosulfate and organic sulfur compound, to constitute compound mercury-removing reagent；According to the concentration of Hg in flue gas and
Fluctuation range determines the component in above-mentioned compound mercury-removing reagent, and is determined in above-mentioned compound mercury-removing reagent respectively according to Hg concentration in flue gas
The ratio of component.
It is come into full contact with using above-mentioned mercury-removing reagent with flue gas, with the component in flue gas chemistry occurs at least one of mercury-removing reagent
Reaction, and generates sulphur simple substance, while also can produce hydrogen sulfide, then elemental sulfur and gaseous mercury in flue gas and there may be
Bivalent mercury chemically react, and be converted into mercuric sulphide, it is possible to create hydrogen sulfide and flue gas in gaseous mercury chemistry occurs
Reaction, is also converted to mercuric sulphide, finally realizes the removal to mercury in flue gas, the chemical reaction that above-mentioned removal of mercury process mainly includes
As follows：
2Hg0(gaseous state)+2H2S+O2→2HgS+2H2O
Hg0(gaseous state)+S → HgS
Compound mercury-removing reagent can be constituted using various ingredients, and is set by carrying out proportion to each component in compound mercury-removing reagent
Meter controls the yield of intermediate product hydrogen sulfide and sulphur simple substance in certain proportion, so that the height of hydrogen sulfide reaction can either be utilized
Activity, and can be avoided the excessive risk of hydrogen sulfide；Meanwhile the active sulphur simple substance (such as sulphur) of generation can be with product mercuric sulphide
Discharge, will not adversely affect flue gas during smelting system for preparing sulfuric acid.
Sulphur simple substance and optional hydrogen sulfide are generated in order to guarantee mercury-removing reagent with can react after smoke contacts, it is preferable that
The polysulfide that above-mentioned mercury-removing reagent includes includes Na2SXOr CaSX, x=1-6；And, it is preferable that above-mentioned organic sulfur compound includes
Ethyl mercaptan, sodium dimethyl dithiocarbamate and sodium dimercaptopropane sulfonate are any one or more of.
In order to improve above-mentioned mercury-removing reagent to the mercury removal efficiency of flue gas, it is preferable that the concentration of mercury in flue gas is 10~800mg/
Nm3；And, it is preferable that the temperature of removal of mercury processing is 25~200 DEG C.
In the step of above-mentioned removal of mercury is handled, it is preferable that mercury-removing reagent dissolution is first configured to removal of mercury agent solution in a solvent,
The penetrating of removal of mercury agent solution is connected in the reactor of flue gas to carry out removal of mercury processing again.Mercury-removing reagent is sprayed into reactor, is made anti-
It answers the gas-liquid contact in device to be able to maintain lesser liquid-gas ratio, to increase gas-liquid mass transfer effect using lesser liquid-gas ratio, makes
Mercury-removing reagent can come into full contact with the mercuryvapour in flue gas, improve mercury-removing reagent to the mercury removal efficiency of flue gas；It is further preferable that cigarette
The way of contact of gas and removal of mercury agent solution is fair current.In gas-liquid contact, liquid measure is small, can be by gas using counter current contacting mode liquid
It takes away, changes flow direction.
It will lead to active reduction since mercury-removing reagent solution concentration is excessively high, and mercury-removing reagent solution concentration then will lead to dissolubility drop
It is low, therefore, in order to improve above-mentioned mercury-removing reagent to the mercury removal efficiency of flue gas, it is preferable that the weight of mercury-removing reagent is dense in removal of mercury agent solution
Degree is 5~25%.
During spraying into above-mentioned removal of mercury agent solution in reactor, as shown in Figure 1, the reactor used may include anti-
Device ontology 10 and injector 20 are answered, reactor body 10 includes exhaust gases passes 110, and above-mentioned injector 20 is set to exhaust gases passes
In 110, with smoke contacts and the removal of mercury is carried out to it for spraying into mercury-removing reagent in exhaust gases passes 110.
Further, above-mentioned reactor can also include impeller guide plate 30 and solid collection device 40, impeller guide plate
30 are located at injector 20 close to the impeller guide plate 30 of exhanst gas outlet side, generate turbulent flow using impeller guide plate 30, increase gas
Liquid time of contact and contact probability promote the progress of gas solid/liquid/gas reactions and gas liquid reaction, and above-mentioned impeller guide plate 30 includes multilayer can
The guide vane 310 of rotation, the direction of rotation of adjacent guide vane is on the contrary, as shown in Figure 2；Above-mentioned solid collection device 40
It is solid for collecting the mercuric sulphide generated after flue gas is contacted with mercury-removing reagent and sulphur etc. in injector 20 close to the side of exhanst gas outlet
Body substance can also be arranged flusher 50 on solid collection device 40 and be rinsed to solid collection device 40.Flue gas with
The reaction product of mercury-removing reagent makes the solid particle in reaction product become larger by impinging upon on solid collection device 40, thus from
It is isolated in gas.
In order to further increase mercury-removing reagent to the mercury removal efficiency of flue gas, it is preferable that the penetrating pressure of removal of mercury agent solution is 0.3
~1.0MPa；Preferably, the flow velocity of flue gas is 2~8m/s；Also, it if mercury-removing reagent dosage is small, is not easy to disperse, can use
Compressed air dispersion mode, i.e., introduce compressed air in above-mentioned reactor, it is preferable that the pressure of compressed air be 0.6~
1.2MPa。
The method for removing hydrargyrum of flue gas provided by the invention is further illustrated below in conjunction with embodiment and comparative example.
Embodiment 1
Method for removing hydrargyrum provided in this embodiment includes the following steps：
Elemental Mercury 80mg/Nm in flue gas3, for the moisture in flue gas close to saturation, compound mercury-removing reagent uses Na2S and Na2S2O3
And it is configured to mixed solution with water, the mass concentration of compound mercury-removing reagent is 4% in solution, and 1 height is arranged in removal of mercury reactor
Injector is pressed, flue gas is passed through in reactor, flow velocity 1.5m/s, compound mercury-removing reagent is sprayed by high-pressure injector and and flue gas
Co-current contact, penetrating pressure are 0.2MPa, and the reaction temperature of fume mercury-removing is at 23 DEG C.
Embodiment 2
Method for removing hydrargyrum provided in this embodiment the difference from embodiment 1 is that：
The mass concentration of compound mercury-removing reagent is 5% in mixed solution containing compound mercury-removing reagent.
Embodiment 3
Method for removing hydrargyrum provided in this embodiment the difference from embodiment 1 is that：
The mass concentration of compound mercury-removing reagent is 25% in mixed solution containing compound mercury-removing reagent.
Embodiment 4
Method for removing hydrargyrum provided in this embodiment and the difference of embodiment 3 are：
Flue gas is passed through in reactor, flow velocity 2m/s, compound mercury-removing reagent is by high-pressure injector penetrating and suitable with flue gas
Stream contact, penetrating pressure are 0.3MPa.
Embodiment 5
Method for removing hydrargyrum provided in this embodiment and the difference of embodiment 3 are：
Flue gas is passed through in reactor, flow velocity 8m/s, compound mercury-removing reagent is by high-pressure injector penetrating and suitable with flue gas
Stream contact, penetrating pressure are 1MPa.
Embodiment 6
Method for removing hydrargyrum provided in this embodiment and the difference of embodiment 5 are：
The reaction temperature of fume mercury-removing is at 25 DEG C.
Embodiment 7
Method for removing hydrargyrum provided in this embodiment and the difference of embodiment 5 are：
The reaction temperature of fume mercury-removing is at 200 DEG C.
Embodiment 8
Method for removing hydrargyrum provided in this embodiment and the difference of embodiment 7 are：
The concentration of mercury in flue gas is 800mg/Nm3。
Embodiment 9
Method for removing hydrargyrum provided in this embodiment includes the following steps：
Elemental Mercury 10mg/Nm in flue gas3, for the moisture in flue gas close to saturation, compound mercury-removing reagent uses the third sulphur of dimercapto
Sour sodium and Na2S2O3And it is configured to mixed solution with water, the mass concentration of compound mercury-removing reagent is 8% in solution, in removal of mercury reactor
2 high-pressure injectors of interior setting, flue gas are passed through in reactor, flow velocity 4m/s, and compound mercury-removing reagent passes through high-pressure injector, spray
Entering pressure is 0.6MPa, mixes with 0.4MPa compressed air and sprays into and contact with flue gas downstream, the reaction temperature of fume mercury-removing exists
120℃。
Embodiment 10
Method for removing hydrargyrum provided in this embodiment includes the following steps：
Elemental Mercury 40mg/Nm in flue gas3, flue gas water content is far below saturation content, and compound mercury-removing reagent is using Na2S and two
Unithiol is simultaneously configured to mixed solution with water, and the mass concentration of compound mercury-removing reagent is 8% in solution, in removal of mercury reactor
1 high-pressure injector of interior setting, flue gas is passed through in reactor, flow velocity 4m/s, compound mercury-removing reagent and compressed air pass through height
Pressure injector is sprayed into and is contacted with flue gas downstream, and penetrating pressure is 0.4MPa, and the reaction temperature of fume mercury-removing is at 100 DEG C.
Comparative example 1
The method for removing hydrargyrum that this comparative example provides includes the following steps：
Elemental Mercury 80mg/Nm in flue gas3, for the moisture in flue gas close to saturation, mercury-removing reagent uses Na2S is simultaneously configured to water
Mixed solution, the mass concentration of mercury-removing reagent is 10% in solution, 1 high-pressure injector is arranged in removal of mercury reactor, by flue gas
It is passed through in reactor, flow velocity 4m/s, mercury-removing reagent is sprayed by high-pressure injector and contacted with flue gas downstream, is sprayed into pressure and is
0.8MPa, the reaction temperature of fume mercury-removing is at 38 DEG C.
After fume mercury-removing is by 0.2s~1s, to the cigarette of reactor discharge in above-described embodiment 1 to 10 and comparative example 1
The concentration of each component is analyzed in gas, and is collected the solid matter generated in reactor while being carried out content analysis, as a result such as
Shown in following table.
It can be seen from the above description that the above embodiments of the present invention realize following technical effect：
1, mercury-removing reagent reacts the sulphur simple substance for generating the high high activity of dispersion degree with the sulfur dioxide in flue gas, can be more effective
Gaseous mercury in ground and flue gas reacts to form mercuric sulphide to removal system, and reacts the extra sulphur simple substance formed and also can
Enough with product mercuric sulphide discharge system, not only contribute to carry out demercuration to flue gas, the presence of extra sulphur simple substance also avoids vulcanizing
The concentration excess of hydrogen avoids hydrogen sulfide negative effect caused by subsequent sulphuric acid system of concentration excess；
2, mercury-removing reagent is sprayed into reactor, the gas-liquid contact in reactor is made to be able to maintain lesser liquid-gas ratio, thus
Increase gas-liquid mass transfer effect using lesser liquid-gas ratio, so that mercury-removing reagent is come into full contact with the mercuryvapour in flue gas, improve
Mercury removal efficiency of the mercury-removing reagent to flue gas.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (11)
1. a kind of method for removing hydrargyrum of flue gas, which is characterized in that include the following steps：
Removal of mercury processing is carried out to the flue gas using mercury-removing reagent, the mercury-removing reagent is can be anti-with the sulfur dioxide in the flue gas
The reagent of sulphur simple substance should be generated.
2. method for removing hydrargyrum according to claim 1, which is characterized in that the mercury-removing reagent includes polysulfide, thiosulfuric acid
Salt and organic sulfur compound are any one or more of.
3. method for removing hydrargyrum according to claim 2, which is characterized in that the polysulfide includes Na2SXOr CaSX, x=1-
6。
4. method for removing hydrargyrum according to claim 2, which is characterized in that the organic sulfur compound includes ethyl mercaptan, dimethyl
Nabam and sodium dimercaptopropane sulfonate are any one or more of.
5. method for removing hydrargyrum according to claim 1, which is characterized in that the concentration of the mercury in flue gas is 10~800mg/
Nm3。
6. method for removing hydrargyrum according to claim 1, which is characterized in that the temperature of the removal of mercury processing is 25~200 DEG C.
7. method for removing hydrargyrum according to claim 1, which is characterized in that in the step of removal of mercury is handled, first removed by described in
Mercurial dissolution is configured to removal of mercury agent solution in a solvent, then removal of mercury agent solution penetrating is connected in the reactor of the flue gas
To carry out the removal of mercury processing, the way of contact of the preferably described flue gas and the removal of mercury agent solution is fair current.
8. method for removing hydrargyrum according to claim 7, which is characterized in that the weight of mercury-removing reagent described in the removal of mercury agent solution
Concentration is 5~25%.
9. method for removing hydrargyrum according to claim 7, which is characterized in that the penetrating pressure of the removal of mercury agent solution be 0.3~
1.0MPa。
10. method for removing hydrargyrum according to claim 9, which is characterized in that the flow velocity of the flue gas is 2~8m/s.
11. method for removing hydrargyrum according to claim 9, which is characterized in that be also connected with compressed air in the reactor, preferably
The pressure of the compressed air is 0.6~1.2MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810897328.6A CN108889110B (en) | 2018-08-08 | 2018-08-08 | Method for removing mercury from flue gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810897328.6A CN108889110B (en) | 2018-08-08 | 2018-08-08 | Method for removing mercury from flue gas |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108889110A true CN108889110A (en) | 2018-11-27 |
| CN108889110B CN108889110B (en) | 2021-05-07 |
Family
ID=64353288
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810897328.6A Active CN108889110B (en) | 2018-08-08 | 2018-08-08 | Method for removing mercury from flue gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108889110B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110256528B (en) * | 2019-07-05 | 2021-08-10 | 浙江海洋大学 | Natural oligopeptide capable of remarkably removing Reactive Oxygen Species (ROS) |
| CN113521979A (en) * | 2021-08-12 | 2021-10-22 | 上海交通大学 | Method for trapping mercury from sulfur-containing mercury-containing flue gas through chlorine selenium mercury deposition |
| WO2022208417A1 (en) * | 2021-04-01 | 2022-10-06 | Chevron U.S.A. Inc. | Mercury removal by injection of reagents in gas phase |
| PL244189B1 (en) * | 2020-02-07 | 2023-12-11 | Rafako Spolka Akcyjna | Method of removing mercury from exhaust gases emitted from coal-fired power plants |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62186925A (en) * | 1986-02-13 | 1987-08-15 | Mitsubishi Heavy Ind Ltd | Treatment of exhaust gas |
| CN101417223A (en) * | 2008-11-18 | 2009-04-29 | 上海电力学院 | Desulfurization and denitration carbon base fuel fume mercury absorbent and use thereof |
| CN101850212A (en) * | 2010-05-25 | 2010-10-06 | 华南理工大学 | Method for removing total mercury from coal burning smoke |
| CN103394282A (en) * | 2013-08-13 | 2013-11-20 | 国家电网公司 | Additive for inhibiting re-release of mercury during wet method flue gas desulfurization process and using method thereof |
| CN103736387A (en) * | 2013-12-20 | 2014-04-23 | 华北电力大学（保定） | Mercury re-releasing inhibitor in wet flue gas desulfurization slurry and application method thereof |
| CN106390716A (en) * | 2016-11-10 | 2017-02-15 | 山东大学 | Flue gas demercuration system and method |
-
2018
- 2018-08-08 CN CN201810897328.6A patent/CN108889110B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62186925A (en) * | 1986-02-13 | 1987-08-15 | Mitsubishi Heavy Ind Ltd | Treatment of exhaust gas |
| CN101417223A (en) * | 2008-11-18 | 2009-04-29 | 上海电力学院 | Desulfurization and denitration carbon base fuel fume mercury absorbent and use thereof |
| CN101850212A (en) * | 2010-05-25 | 2010-10-06 | 华南理工大学 | Method for removing total mercury from coal burning smoke |
| CN103394282A (en) * | 2013-08-13 | 2013-11-20 | 国家电网公司 | Additive for inhibiting re-release of mercury during wet method flue gas desulfurization process and using method thereof |
| CN103736387A (en) * | 2013-12-20 | 2014-04-23 | 华北电力大学（保定） | Mercury re-releasing inhibitor in wet flue gas desulfurization slurry and application method thereof |
| CN106390716A (en) * | 2016-11-10 | 2017-02-15 | 山东大学 | Flue gas demercuration system and method |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110256528B (en) * | 2019-07-05 | 2021-08-10 | 浙江海洋大学 | Natural oligopeptide capable of remarkably removing Reactive Oxygen Species (ROS) |
| PL244189B1 (en) * | 2020-02-07 | 2023-12-11 | Rafako Spolka Akcyjna | Method of removing mercury from exhaust gases emitted from coal-fired power plants |
| WO2022208417A1 (en) * | 2021-04-01 | 2022-10-06 | Chevron U.S.A. Inc. | Mercury removal by injection of reagents in gas phase |
| US12083473B2 (en) | 2021-04-01 | 2024-09-10 | Chevron U.S.A. Inc. | Mercury removal by injection of reagents in gas phase |
| CN113521979A (en) * | 2021-08-12 | 2021-10-22 | 上海交通大学 | Method for trapping mercury from sulfur-containing mercury-containing flue gas through chlorine selenium mercury deposition |
| CN113521979B (en) * | 2021-08-12 | 2024-01-12 | 上海交通大学 | Method for trapping mercury from sulfur-containing mercury-containing flue gas through chlorselenomel deposition |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108889110B (en) | 2021-05-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108889110A (en) | The method for removing hydrargyrum of flue gas | |
| US7514053B2 (en) | Method for removing sulfur dioxide, mercury, and nitrogen oxides from a gas stream | |
| CA3059554C (en) | Systems and processes for removing hydrogen sulfide from gas streams | |
| Kaczur | Oxidation chemistry of chloric acid in NOx/SOx and air toxic metal removal from gas streams | |
| US20150322580A1 (en) | Treatment of hydrogen sulfide | |
| EP1901832A1 (en) | Removal of hg, nox and sox using oxidants and staged gas/liquid contact | |
| US20070154373A1 (en) | Methods for regenerating oxidants used for removing pollutants from a gas stream | |
| Hultén et al. | First evaluation of a multicomponent flue gas cleaning concept using chlorine dioxide gas–Experiments on chemistry and process performance | |
| CN105107340A (en) | Desulfurization, denitrification and demercuration integration apparatus based on amino absorber and method therefor | |
| US8409534B2 (en) | Control of emissions | |
| CN102423612B (en) | Method for producing thiosulfate and recovering carbon dioxide by utilizing industrial flue gas | |
| PL166828B1 (en) | Method of removing hydrogen sulfide and/or carbon disulfide from flue gases | |
| AU2013364034B2 (en) | Treatment of hydrogen sulfide | |
| CN110947297A (en) | Green treatment method for chlorine-containing waste gas | |
| CN102652895A (en) | Method for recovering sulfur dioxide in flue gas | |
| CN208878271U (en) | The mercury removal device of flue gas | |
| Barbooti et al. | Removal of nitrogen dioxide and sulfur dioxide from air streams by absorption in urea solution | |
| CN108889111A (en) | The mercury removal device of flue gas | |
| CN105879647A (en) | Waste-gypsum-residue-free desulfuration system and process thereof | |
| Zhang et al. | Study on catalytic wet oxidation of H2S into sulfur on Fe/Cu catalyst | |
| CN107715670A (en) | A kind of method of flue gas desulfurization collaboration denitration by-product HAS | |
| CN214552494U (en) | Flue gas treatment device capable of realizing electrolytic regeneration | |
| CN202778263U (en) | System for recovering sulfur dioxide in smoke | |
| Gao et al. | Absorption of NO 2 into Na 2 S solution in a stirred tank reactor | |
| CN109954388A (en) | A kind of flue-gas dust-removing and desulfurization nitrogen rejection facility |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |