CN106582247A - Sulfur and metal removal method for metallurgical flue gas - Google Patents
Sulfur and metal removal method for metallurgical flue gas Download PDFInfo
- Publication number
- CN106582247A CN106582247A CN201611220463.4A CN201611220463A CN106582247A CN 106582247 A CN106582247 A CN 106582247A CN 201611220463 A CN201611220463 A CN 201611220463A CN 106582247 A CN106582247 A CN 106582247A
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- CN
- China
- Prior art keywords
- flue gas
- metallurgical
- strong oxidant
- demetalizating
- gas
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- 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.)
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Classifications
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- 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
- B01D53/80—Semi-solid phase processes, i.e. by using slurries
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
- B01D50/60—Combinations of devices covered by groups B01D46/00 and B01D47/00
-
- 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
- B01D53/60—Simultaneously removing sulfur oxides and nitrogen oxides
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- 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
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/025—Other waste gases from metallurgy plants
-
- 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
Abstract
The invention provides a sulfur and metal removal method for metallurgical flue gas. The method comprises the steps: spraying and washing to-be-purified metallurgical flue gas with an ammonium sulfate solution, wherein the temperature of the metallurgical flue gas is reduced to be lower than 80 DEG C; gathering soot containing metal ions in the metallurgical flue gas by virtue of surface activity of the ammonium sulfate solution; then dedusting the sprayed and washed flue gas through a bag type dust collector; and then desulfurizing the flue gas in a desulfurization tower, wherein a desulfurization agent is slurry prepared by ferric trichloride and a chlorine-containing strong oxidant and the ferric trichloride accounts for 10-20% by weight of the chlorine-containing strong oxidant. The method provided by the invention can effectively remove metals and sulfur dioxide in the metallurgical flue gas.
Description
Technical field
The invention belongs to fume treatment technical field, and in particular to a kind of metallurgical gas desulfuration process for demetalizating.
Background technology
Metallurgical life is carried out using pyrogenic process more than China's metallurgy industry such as rare nonferrous metals ore such as nickel molybdenum sulphide ore, antimony sulphide ore
Produce, to extract useful metallic element and its Related product.Will necessarily produce in full-boiled process production and substantial amounts of containing flue dust and contain
The high-temperature flue gas of harmful gass.Contain substantial amounts of precious metal particles thing and compound in these flue dust, it is both dirty if not reclaiming
Dye environment, and waste of resource.
Cigarette containing arsenic after the dedusting produced in the roasting of sulphide ore and other mineral or smelting process in colored metallurgical industrial
Gas, typically in SO2Adopt spent acid or waste water washing method to remove arsenic therein before antacid.The spent acid for obtaining and waste water are through nothing
Discharge after evilization process, as in flue gas, arsenic content is few, the quantity of slag for finally giving is also little, it is easy to process.But need to increase
Treatment process simultaneously increases system investments and operating cost.
SO in colored metallurgical industrial, in some technical process flue gases2Concentration is low, it is impossible to direct extracting sulfuric acid.By removing
After dirt containing heavy metal and SO2Flue gas, conventional method are to wash cooling before heat smoke desulfurization with water, produce3- N and weight
The difficult waste water of metal, needs to containing NH3The waste water of-N and heavy metal is processed, and investment and operating cost are high.Or heat
Flue gas Jing sour gas agent for capturing, removing absorbent and strong oxidizer ozone or hydrogen peroxide carry out desulfurization, removing heavy-metal, exist
Desulfurization, removing heavy-metal incomplete, it is difficult to the shortcoming of recovery, the such as Chinese invention patent of Application No. 201110091281.2
" flue gas desulfurization and denitrification removing heavy-metal integral method and special equipment ", also has investment, the shortcomings of operating cost is high.
The content of the invention
The present invention proposes a kind of metallurgical gas desulfuration process for demetalizating, and the method can effectively remove the gold in metallurgical gas
Category and sulfur dioxide.
The technical scheme is that what is be achieved in that：
A kind of metallurgical gas desulfuration process for demetalizating, by metallurgical gas to be clean by being sprayed with ammonium sulfate
Washing, makes the temperature of metallurgical gas be down to less than 80 DEG C, and the surface activity using ammonium sulfate will contain in metallurgical gas
The smoke catching of metal ion gets off, then the flue gas after spray washing is entered back into desulfurizing tower and entered by sack cleaner dedusting
Row desulfurization, desulfurizing agent is the serosity being configured to by ferric chloride and chloric strong oxidant, the percetage by weight of the ferric chloride
For chloric strong oxidant 10～20%.
Further, the filter bag that the sack cleaner is used is knifing filter bag.
In some embodiments of the present invention, knifing filter bag is processed to fiber filter bag surface by scraping membrane process, makes filter
The surface of bag is more smooth, and filter opening becomes less, and forms a metafiltration film on fiber filter bag surface.This knifing filter bag surface and cover
The film layer on membrane filtration bag surface is relatively similar, and the main distinction is：The film material on membrane bag filter surface is different with host material, and knifing
Filter bag film material is identical with host material, therefore formation mechenism is different.Knifing filter bag superficial film comparatively robust, is difficult to take off
Fall, and membrane bag filter manufacturing process is complicated, it is general easy to fall off.Knifing filter bag realizes rare precious metal by the way of surface filtration
The recovery and filtration of element and oxide, can reach 99.99% to the fine metal particle response rate of PM2.5.
Further, the chloric strong oxidant is sodium chlorite, sodium hypochlorite, calcium chlorite, calcium hypochlorite and bleaching
One or more in powder.
Further, the collocation method of the desulfurizing agent is first chloric strong oxidant to be added to the water and stirred, Ran Houtong
Enter oxygen and add ferric chloride to stir.
Beneficial effects of the present invention：
1st, using wet cooling dust collecting process, the high-temperature flue gas just discharged using ammonium sulfate washing after regeneration,
Make the temperature of flue gas be reduced to less than 80 DEG C, improve can ammonium sulfate concentration, and can be preferably in recovered flue gas SO2With
Heavy metal, has got rid of tradition water and has gone the drawbacks of washing cooling, will not produce NH in making art production process3- N, has saved water
Dirt, the investment of electric demisting are removed, is also saved containing NH3The wastewater treatment investment of-N and heavy metal and operating cost.
2nd, effectively the fish that has escape the net " heavy metal " of ammonium sulfate process can be had containing ferric chloride in desulfurizing agent
Effect is removed, and is processed through twice, and the tenor content in flue gas is reduced to 0.5～1%；Chloric strong oxidant is dissolved in water generation
ClO-、ClO2-Etc. strong oxidizing property ion, NO can be aoxidized, generate NO3-、Cl-Deng product, absorbent is dissolved in water in alkalescence,
The OH that hydrolysis is produced-With SO2Reaction generates SO3 2- and SO4 2- ion, so as to remove the NOx in flue gas and SO2, desulfurization degree reaches
96%.
Specific embodiment
Embodiment 1
A kind of metallurgical gas desulfuration process for demetalizating, by metallurgical gas to be clean by being sprayed with ammonium sulfate
Washing, makes the temperature of metallurgical gas be down to less than 80 DEG C, and the surface activity using ammonium sulfate will contain in metallurgical gas
The smoke catching of metal ion gets off, then the flue gas after spray washing is entered back into desulfurizing tower and entered by sack cleaner dedusting
Row desulfurization, desulfurizing agent are the serosity being configured to by 1.5% ferric chloride and 15% sodium hypochlorite.Wherein, sack cleaner is used
Filter bag be knifing filter bag.Flue gas inspection result after purification is shown, 75% denitration efficiency and more than 96% can be reached
Desulfuration efficiency, demetallization per reach 99.1%.
The collocation method of desulfurizing agent then passes to oxygen and adds trichlorine first sodium hypochlorite to be added to the water and being stirred
Change ferrum to stir.
Embodiment 2
A kind of metallurgical gas desulfuration process for demetalizating, by metallurgical gas to be clean by being sprayed with ammonium sulfate
Washing, makes the temperature of metallurgical gas be down to less than 80 DEG C, and the surface activity using ammonium sulfate will contain in metallurgical gas
The smoke catching of metal ion gets off, then the flue gas after spray washing is entered back into desulfurizing tower and entered by sack cleaner dedusting
Row desulfurization, desulfurizing agent are the serosity being configured to by 4% ferric chloride and 20% bleaching powder.Wherein, the filter that sack cleaner is used
Bag is knifing filter bag.Flue gas inspection result after purification is shown, 75% denitration efficiency and more than 96% desulfurization can be reached
Efficiency, demetallization per reach 99.5%.
The collocation method of desulfurizing agent then passes to oxygen and adds tri-chlorination first bleaching powder to be added to the water and being stirred
Ferrum stirs.
Embodiment 3
A kind of metallurgical gas desulfuration process for demetalizating, by metallurgical gas to be clean by being sprayed with ammonium sulfate
Washing, makes the temperature of metallurgical gas be down to less than 80 DEG C, and the surface activity using ammonium sulfate will contain in metallurgical gas
The smoke catching of metal ion gets off, then the flue gas after spray washing is entered back into desulfurizing tower and entered by sack cleaner dedusting
Row desulfurization, desulfurizing agent are the serosity being configured to by 2.4% ferric chloride, 8% sodium hypochlorite, 8% calcium hypochlorite.Wherein, pocket type
The filter bag that cleaner unit is used is knifing filter bag.Flue gas inspection result after purification is shown, can reach 75% denitration efficiency and
More than 96% desulfuration efficiency, demetallization per reach 99.3%.
The collocation method of desulfurizing agent then passes to oxygen first sodium hypochlorite to be added to the water with calcium hypochlorite and being stirred
Add ferric chloride to stir.
Presently preferred embodiments of the present invention is the foregoing is only, not to limit the present invention, all essences in the present invention
Within god and principle, any modification, equivalent substitution and improvements made etc. should be included within the scope of the present invention.
Claims (4)
1. a kind of metallurgical gas desulfuration process for demetalizating, it is characterised in that by metallurgical gas to be clean by molten with ammonium sulfate
Liquid carries out spray washing, makes the temperature of metallurgical gas be down to less than 80 DEG C, and using ammonium sulfate surface activity by metallurgy
In flue gas, the smoke catching containing metal ion gets off, then by the flue gas after spray washing by sack cleaner dedusting, then enter
Entering desulfurizing tower carries out desulfurization, and desulfurizing agent is the serosity being configured to by ferric chloride and chloric strong oxidant, the ferric chloride
Percetage by weight is chloric strong oxidant 10～20%.
2. metallurgical gas desulfuration process for demetalizating according to claim 1, it is characterised in that the sack cleaner is used
Filter bag be knifing filter bag.
3. metallurgical gas desulfuration process for demetalizating according to claim 1, it is characterised in that the chloric strong oxidant is
One or more in sodium chlorite, sodium hypochlorite, calcium chlorite, calcium hypochlorite and bleaching powder.
4. metallurgical gas desulfuration process for demetalizating according to claim 1, it is characterised in that the configuration side of the desulfurizing agent
Method then passes to oxygen and adds ferric chloride stir first chloric strong oxidant to be added to the water and stirred.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611220463.4A CN106582247A (en) | 2016-12-26 | 2016-12-26 | Sulfur and metal removal method for metallurgical flue gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611220463.4A CN106582247A (en) | 2016-12-26 | 2016-12-26 | Sulfur and metal removal method for metallurgical flue gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106582247A true CN106582247A (en) | 2017-04-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611220463.4A Pending CN106582247A (en) | 2016-12-26 | 2016-12-26 | Sulfur and metal removal method for metallurgical flue gas |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1883768A (en) * | 2006-05-29 | 2006-12-27 | 浙江大学 | Wet method combined process for desulfurization and denitration for chlorine-containing strong oxidizer absorption liquid |
| CN102049163A (en) * | 2010-11-05 | 2011-05-11 | 合肥天翔环境工程有限公司 | System for recovering metals, removing dust and desulfurizing |
| CN102949926A (en) * | 2012-11-16 | 2013-03-06 | 昆明理工大学 | Method for recycling sulfur dioxide (SO2) and heavy metal in metallurgical gas |
| CN103055668A (en) * | 2012-12-28 | 2013-04-24 | 云南亚太环境工程设计研究有限公司 | Method and device for desulphurization and heavy metal-removal process on colored metallurgical fume |
| CN103768910A (en) * | 2014-01-16 | 2014-05-07 | 昆明理工大学 | Synergetic purification method and device for SO2 and heavy metals in smelting flue gas |
-
2016
- 2016-12-26 CN CN201611220463.4A patent/CN106582247A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1883768A (en) * | 2006-05-29 | 2006-12-27 | 浙江大学 | Wet method combined process for desulfurization and denitration for chlorine-containing strong oxidizer absorption liquid |
| CN102049163A (en) * | 2010-11-05 | 2011-05-11 | 合肥天翔环境工程有限公司 | System for recovering metals, removing dust and desulfurizing |
| CN102949926A (en) * | 2012-11-16 | 2013-03-06 | 昆明理工大学 | Method for recycling sulfur dioxide (SO2) and heavy metal in metallurgical gas |
| CN103055668A (en) * | 2012-12-28 | 2013-04-24 | 云南亚太环境工程设计研究有限公司 | Method and device for desulphurization and heavy metal-removal process on colored metallurgical fume |
| CN103768910A (en) * | 2014-01-16 | 2014-05-07 | 昆明理工大学 | Synergetic purification method and device for SO2 and heavy metals in smelting flue gas |
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Application publication date: 20170426 |
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