CN108722133A - A kind of fume desulfuring and denitrifying method of Resource recovery - Google Patents
A kind of fume desulfuring and denitrifying method of Resource recovery Download PDFInfo
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- CN108722133A CN108722133A CN201710259579.7A CN201710259579A CN108722133A CN 108722133 A CN108722133 A CN 108722133A CN 201710259579 A CN201710259579 A CN 201710259579A CN 108722133 A CN108722133 A CN 108722133A
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- sodium
- flue gas
- cleaning solution
- sodium carbonate
- nitrogen
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- 238000000034 method Methods 0.000 title claims abstract description 14
- 239000003517 fume Substances 0.000 title claims abstract description 6
- 238000011084 recovery Methods 0.000 title claims abstract description 6
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 claims abstract description 53
- 239000003546 flue gas Substances 0.000 claims abstract description 28
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 25
- VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Chemical compound [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 claims abstract description 24
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 claims abstract description 21
- 238000006243 chemical reaction Methods 0.000 claims abstract description 11
- 235000010344 sodium nitrate Nutrition 0.000 claims abstract description 9
- 239000004317 sodium nitrate Substances 0.000 claims abstract description 9
- 235000010265 sodium sulphite Nutrition 0.000 claims abstract description 9
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 42
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 33
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 21
- 239000007921 spray Substances 0.000 claims description 14
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims description 8
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 7
- 238000001953 recrystallisation Methods 0.000 claims description 7
- 239000011734 sodium Substances 0.000 claims description 7
- 229910052708 sodium Inorganic materials 0.000 claims description 7
- 238000010521 absorption reaction Methods 0.000 claims description 6
- 230000008676 import Effects 0.000 claims description 5
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 4
- 229910017604 nitric acid Inorganic materials 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 2
- 229910052799 carbon Inorganic materials 0.000 claims description 2
- 238000004140 cleaning Methods 0.000 claims 5
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims 3
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 claims 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims 1
- 235000019738 Limestone Nutrition 0.000 claims 1
- UIIMBOGNXHQVGW-DEQYMQKBSA-M Sodium bicarbonate-14C Chemical compound [Na+].O[14C]([O-])=O UIIMBOGNXHQVGW-DEQYMQKBSA-M 0.000 claims 1
- 235000011941 Tilia x europaea Nutrition 0.000 claims 1
- 239000000945 filler Substances 0.000 claims 1
- 239000004571 lime Substances 0.000 claims 1
- 239000006028 limestone Substances 0.000 claims 1
- 239000000203 mixture Substances 0.000 claims 1
- 229910000027 potassium carbonate Inorganic materials 0.000 claims 1
- 235000011181 potassium carbonates Nutrition 0.000 claims 1
- IWZKICVEHNUQTL-UHFFFAOYSA-M potassium hydrogen phthalate Chemical compound [K+].OC(=O)C1=CC=CC=C1C([O-])=O IWZKICVEHNUQTL-UHFFFAOYSA-M 0.000 claims 1
- 235000011118 potassium hydroxide Nutrition 0.000 claims 1
- 239000011833 salt mixture Substances 0.000 claims 1
- 235000011121 sodium hydroxide Nutrition 0.000 claims 1
- 238000005406 washing Methods 0.000 claims 1
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 abstract description 32
- MGWGWNFMUOTEHG-UHFFFAOYSA-N 4-(3,5-dimethylphenyl)-1,3-thiazol-2-amine Chemical compound CC1=CC(C)=CC(C=2N=C(N)SC=2)=C1 MGWGWNFMUOTEHG-UHFFFAOYSA-N 0.000 abstract description 23
- JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Inorganic materials O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 abstract description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 5
- 239000002699 waste material Substances 0.000 abstract description 4
- 239000003317 industrial substance Substances 0.000 abstract description 3
- XHHZBVWPCLTQQQ-UHFFFAOYSA-L S(=O)=O.C([O-])([O-])=O.[Na+].[Na+] Chemical compound S(=O)=O.C([O-])([O-])=O.[Na+].[Na+] XHHZBVWPCLTQQQ-UHFFFAOYSA-L 0.000 abstract description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 6
- 150000003839 salts Chemical class 0.000 description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- IWLUJCZGMDWKRT-UHFFFAOYSA-N azane oxygen(2-) titanium(4+) Chemical compound N.[O-2].[Ti+4].[O-2] IWLUJCZGMDWKRT-UHFFFAOYSA-N 0.000 description 3
- 230000003834 intracellular effect Effects 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 238000004064 recycling Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- DOTMOQHOJINYBL-UHFFFAOYSA-N molecular nitrogen;molecular oxygen Chemical compound N#N.O=O DOTMOQHOJINYBL-UHFFFAOYSA-N 0.000 description 2
- GTTYPHLDORACJW-UHFFFAOYSA-N nitric acid;sodium Chemical compound [Na].O[N+]([O-])=O GTTYPHLDORACJW-UHFFFAOYSA-N 0.000 description 2
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 description 2
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 238000003916 acid precipitation Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-N carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical compound S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- 238000011282 treatment Methods 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
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
- B01D53/46—Removing components of defined structure
- B01D53/60—Simultaneously removing sulfur oxides and nitrogen oxides
-
- 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
- B01D53/75—Multi-step processes
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D5/00—Sulfates or sulfites of sodium, potassium or alkali metals in general
- C01D5/14—Preparation of sulfites
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D9/00—Nitrates of sodium, potassium or alkali metals in general
- C01D9/06—Preparation with gaseous nitric acid or nitrogen oxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/10—Oxidants
- B01D2251/104—Ozone
-
- 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
- B01D2251/60—Inorganic bases or salts
- B01D2251/606—Carbonates
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/40—Nitrogen compounds
- B01D2257/402—Dinitrogen oxide
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/40—Nitrogen compounds
- B01D2257/404—Nitrogen oxides other than dinitrogen oxide
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/12—Methods and means for introducing reactants
- B01D2259/124—Liquid reactants
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02C—CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
- Y02C20/00—Capture or disposal of greenhouse gases
- Y02C20/10—Capture or disposal of greenhouse gases of nitrous oxide (N2O)
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Biomedical Technology (AREA)
- Inorganic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Materials Engineering (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Agronomy & Crop Science (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention discloses a kind of fume desulfuring and denitrifying methods of Resource recovery, with sodium carbonate sulfur dioxide and conversion of nitrogen oxides at sodium sulfite and sodium nitrate, and recycle.Not only flue gas has been purified, but also has recycled sulfur dioxide and nitrogen dioxide, they are become utilizable industrial chemicals.Water is also recycled simultaneously.Not only environment is protected, but also has recycled resource, is turned waste into wealth.
Description
Technical field
The invention belongs to environmental technology fields, are related to a kind of fume desulfuring and denitrifying method of Resource recovery.
Background technology
Haze weather frequently occurs so that environmental protection problem becomes the matter of great urgency.Haze formation the reason of be：Industry
Change and the sour gas such as the sulfur dioxide of automobile generation and nitrogen oxides (using nitrogen dioxide as representative) gather a certain concentration, meets
To humidity increase, temperature change, is combined to form sulfurous acid and nitric acid with the vapor in air, continue absorption vapor formed it is small
Water droplet nebulizes, and along with the aerial solid particulate matter that suspends, becomes haze.
China is coal-fired big country, and annual fire coal generates a large amount of sulfur dioxide and nitrogen dioxide, is discharged into air, causes
Haze, forms acid rain, that is, endangers environment, and the huge waste of injury and resource is generated to people's health.
Invention content
The invention discloses a kind of fume desulfuring and denitrifying methods of Resource recovery, with sodium carbonate sulfur dioxide and nitrogen oxygen
Compound is converted to sodium sulfite and sodium nitrate, and recycles.Not only flue gas has been purified, but also has recycled sulfur dioxide and titanium dioxide
They are become utilizable industrial chemicals by nitrogen.Water is also recycled simultaneously.Not only environment is protected, but also has recycled resource, becomes useless
For treasured.
The present invention's is simple for process, and equipment manufacturing cost is low, and operation cost is low, has recycled resource, and the waste of generation is also seldom.
The technique of the present invention is as follows：
(1) flue gas after dedusting is imported in the pipeline of spray equipment, the carbonic acid for being 10%-100% with saturation degree
Sodium solution, which is divided in two parts, washs flue gas, and the sulfur dioxide and nitrogen dioxide in flue gas occur as follows with sodium carbonate liquor
Reaction：
SO2+H2O+Na2CO3→Na2SO3+CO2
NO2+H2O+Na2CO3→NaNO3+CO2+NO
Former and later two parts of spray equipment point, the sulfur dioxide of flue gases and content of nitrogen dioxide of preceding part are high, conversion
Soon, when the pH value of sodium carbonate liquor reduces, illustrate that sodium carbonate is most of and reacted, generate sodium sulfite and nitric acid
Sodium.These solution are exported, the salt that moisture is mixed is evaporated off.It can be obtained by pure sodium sulfite and nitric acid by recrystallization
Sodium.
The sodium carbonate liquor of part afterwards imports preceding part, continues spray, absorbs, until when pH value reduces, repeats previous mistake
Journey.
(2) flue gas that step is washed in process, sulfur dioxide, nitrogen dioxide and other nitrogen oxides are absorbed, titanium dioxide
Nitrogen generates the nitric oxide for accounting for its total amount one third again.At this point, introducing the air by ozone generator in the duct, make institute
1-5 times that ozoniferous molal quantity is pipeline intracellular nitric oxide molal quantity is produced, is reacted 1-5 seconds in the duct, by nitric oxide oxygen
Turn to nitrogen dioxide.The sodium carbonate liquor for being again 10%-100% with saturation degree, which is divided in two parts, washs flue gas, absorbs cigarette
Nitrogen dioxide in road gas.The nitric oxide produced later can also be by superfluous ozone oxidation at nitrogen dioxide, and continuation is inhaled
It receives so that nitrogen oxides recycling is utilized, while meeting discharge standard.
Former and later two parts of spray equipment in pipeline point, content of nitrogen dioxide is high in the flue gas of preceding part, and conversion is fast,
When the pH value of sodium carbonate liquor reduces, illustrates that sodium carbonate is most of and reacted, generate sodium nitrate.It is molten to export these
Liquid is evaporated off moisture and obtains salt.It can be obtained by pure sodium nitrate by recrystallization.
Evaporation process can use the waste heat of flue gas to be heated, and evaporate the intimate pure water of water of generation, can also utilize.
Whole process is nearly free from waste, also produces industrial chemicals.
The present invention can carry out spray-absorption in absorption tower, but can increase equipment cost.
The present invention is suitable for all exhaust-gas treatments containing oxysulfide, nitrogen oxides.
Specific implementation mode
Embodiment 1, (1) are imported with the flue gas after dedusting in the pipeline of spray equipment, the carbon for being 50% with saturation degree
Acid sodium solution, which is divided in two parts, washs flue gas, and the sulfur dioxide and nitrogen dioxide in flue gas occur such as with sodium carbonate liquor
Lower reaction：
SO2+H2O+Na2CO3→Na2SO3+CO2
NO2+H2O+Na2CO3→NaNO3+CO2+NO
Former and later two parts of spray equipment point, the sulfur dioxide of flue gases and content of nitrogen dioxide of preceding part are high, conversion
Soon, when the pH value of sodium carbonate liquor reduces, illustrate that sodium carbonate is most of and reacted, generate sodium sulfite and nitric acid
Sodium.These solution are exported, the salt that moisture is mixed is evaporated off.It can be obtained by pure sodium sulfite and nitric acid by recrystallization
Sodium.
The sodium carbonate liquor of part afterwards imports preceding part, continues spray, absorbs, until when pH value reduces, repeats previous mistake
Journey.
(2) flue gas that step is washed in process, sulfur dioxide, nitrogen dioxide and other nitrogen oxides are absorbed, titanium dioxide
Nitrogen generates the nitric oxide for accounting for its total amount one third again.At this point, introducing the air by ozone generator in the duct, make institute
1-5 times that ozoniferous molal quantity is pipeline intracellular nitric oxide molal quantity is produced, is reacted 1-5 seconds in the duct, by nitric oxide oxygen
Turn to nitrogen dioxide.The sodium carbonate liquor for being again 50% with saturation degree, which is divided in two parts, washs flue gas, and two in flue gas
Nitrogen oxide, the nitric oxide produced later can also be by superfluous ozone oxidations at nitrogen dioxide, and continuation is absorbed so that nitrogen oxygen
Compound recycling is utilized, while meeting discharge standard.
Former and later two parts of spray equipment in pipeline point, content of nitrogen dioxide is high in the flue gas of preceding part, and conversion is fast,
When the pH value of sodium carbonate liquor reduces, illustrates that sodium carbonate is most of and reacted, generate sodium nitrate.It is molten to export these
Liquid is evaporated off moisture and obtains salt.It can be obtained by pure sodium nitrate by recrystallization.
Embodiment 2, (1) are imported with the flue gas after dedusting in the pipeline of spray equipment, the hydrogen for being 50% with saturation degree
Sodium hydroxide solution, which is divided in two parts, washs flue gas, and the sulfur dioxide and nitrogen dioxide in flue gas are sent out with sodium hydroxide solution
Raw following reaction：
SO2+H2O+NaOH→Na2SO3+CO2
NO2+H2O+NaOH→NaNO3+CO2+NO
Former and later two parts of spray equipment point, the sulfur dioxide of flue gases and content of nitrogen dioxide of preceding part are high, conversion
Soon, when the pH value of sodium hydroxide solution reduces, illustrate that sodium hydroxide is most of and reacted, generate sodium sulfite and nitre
Sour sodium.These solution are exported, the salt that moisture is mixed is evaporated off.It can be obtained by pure sodium sulfite and nitre by recrystallization
Sour sodium.
The sodium hydroxide solution of part afterwards imports preceding part, continues spray, absorbs, until when pH value reduces, repeats previous
Process.
(2) flue gas that step is washed in process, sulfur dioxide, nitrogen dioxide and other nitrogen oxides are absorbed, titanium dioxide
Nitrogen generates the nitric oxide for accounting for its total amount one third again.At this point, introducing the air by ozone generator in the duct, make institute
1-5 times that ozoniferous molal quantity is pipeline intracellular nitric oxide molal quantity is produced, is reacted 1-5 seconds in the duct, by nitric oxide oxygen
Turn to nitrogen dioxide.The sodium hydroxide solution for being again 50% with saturation degree, which is divided in two parts, washs flue gas, in flue gas
Nitrogen dioxide, the nitric oxide produced later can also be by superfluous ozone oxidations at nitrogen dioxide, and continuation is absorbed so that nitrogen
Oxide recycling is utilized, while meeting discharge standard.
Former and later two parts of spray equipment in pipeline point, content of nitrogen dioxide is high in the flue gas of preceding part, and conversion is fast,
When the pH value of sodium hydroxide solution reduces, illustrates that sodium hydroxide is most of and reacted, generate sodium nitrate.Export these
Solution is evaporated off moisture and obtains salt.It can be obtained by pure sodium nitrate by recrystallization.
Claims (4)
1. a kind of fume desulfuring and denitrifying method of Resource recovery, processing step are as follows：(1) flue gas after dedusting is having
In the pipeline of spray equipment, be divided in two parts be 10%-100% with saturation degree sodium carbonate liquor wash, preceding portion washes
When the pH value of liquid reduces, cleaning solution is exported, moisture is evaporated off, gained salt-mixture can obtain sodium sulfite and nitric acid by recrystallization
Sodium, part system before rear part cleaning solution imports；(2) flue gas portion introduces the air by ozone generation device on, makes ozone
Content reaches 1-5 times of nitric oxide molal quantity, and hybrid reaction 1-5 seconds in pipeline, be divided in two parts is with saturation degree
The sodium carbonate liquor of 10%-100% washs, and when the pH value of preceding part cleaning solution reduces, exports cleaning solution, moisture is evaporated off, obtains
Sodium nitrate, part system before rear part cleaning solution imports.
2. according to claim 1, lime stone, white lime, sodium hydroxide, potassium hydroxide, potassium carbonate, sodium bicarbonate, carbon can be used
Or mixtures thereof potassium hydrogen phthalate replaces sodium carbonate.
3. according to claim 1, filler can be installed additional under spray tube, for increasing absorption area.
4. according to claim 1, absorption washing can be carried out in absorption tower.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710259579.7A CN108722133A (en) | 2017-04-20 | 2017-04-20 | A kind of fume desulfuring and denitrifying method of Resource recovery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710259579.7A CN108722133A (en) | 2017-04-20 | 2017-04-20 | A kind of fume desulfuring and denitrifying method of Resource recovery |
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| Publication Number | Publication Date |
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| CN108722133A true CN108722133A (en) | 2018-11-02 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110075690A (en) * | 2019-05-24 | 2019-08-02 | 南京永诺环保科技有限公司 | A kind of novel oxynitrides tobacco remover and its application method |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1237473A (en) * | 1998-06-02 | 1999-12-08 | 波克股份有限公司 | Removal of NOx and SOx emissions from pickling lines for metal treatment |
| US20070154374A1 (en) * | 2006-01-05 | 2007-07-05 | Envirosolv Energy Llc | Method for removing sulfur dioxide and other acid gases, mercury, and nitrogen oxides from a gas stream with the optional production of ammonia based fertilizers |
| CN101053748A (en) * | 2007-04-30 | 2007-10-17 | 武汉凯迪电力环保有限公司 | Simultaneously removing various pollutant wet ammonia flue gas cleaning technology and system thereof |
| CN103977679A (en) * | 2014-05-13 | 2014-08-13 | 东南大学 | Grading oxidation and absorption type method for simultaneous desulphurization and denitration of sintering flue gas, and system |
| CN104383798A (en) * | 2014-09-25 | 2015-03-04 | 华北电力大学（保定） | Flue gas desulfurization and denitration purification recovery system |
| CN105318734A (en) * | 2015-03-21 | 2016-02-10 | 李正福 | Device and method for applying and purifying waste heat of low-temperature waste gas of large sintering flue |
| CN106474893A (en) * | 2016-12-15 | 2017-03-08 | 中国科学院过程工程研究所 | The flue gas desulfurization and denitration technique that a kind of ozone oxidization combination slag absorbs |
-
2017
- 2017-04-20 CN CN201710259579.7A patent/CN108722133A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1237473A (en) * | 1998-06-02 | 1999-12-08 | 波克股份有限公司 | Removal of NOx and SOx emissions from pickling lines for metal treatment |
| US20070154374A1 (en) * | 2006-01-05 | 2007-07-05 | Envirosolv Energy Llc | Method for removing sulfur dioxide and other acid gases, mercury, and nitrogen oxides from a gas stream with the optional production of ammonia based fertilizers |
| CN101053748A (en) * | 2007-04-30 | 2007-10-17 | 武汉凯迪电力环保有限公司 | Simultaneously removing various pollutant wet ammonia flue gas cleaning technology and system thereof |
| CN103977679A (en) * | 2014-05-13 | 2014-08-13 | 东南大学 | Grading oxidation and absorption type method for simultaneous desulphurization and denitration of sintering flue gas, and system |
| CN104383798A (en) * | 2014-09-25 | 2015-03-04 | 华北电力大学（保定） | Flue gas desulfurization and denitration purification recovery system |
| CN105318734A (en) * | 2015-03-21 | 2016-02-10 | 李正福 | Device and method for applying and purifying waste heat of low-temperature waste gas of large sintering flue |
| CN106474893A (en) * | 2016-12-15 | 2017-03-08 | 中国科学院过程工程研究所 | The flue gas desulfurization and denitration technique that a kind of ozone oxidization combination slag absorbs |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110075690A (en) * | 2019-05-24 | 2019-08-02 | 南京永诺环保科技有限公司 | A kind of novel oxynitrides tobacco remover and its application method |
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