CN101406803A - Ultrasonic wave denitration method for flue gas - Google Patents
Ultrasonic wave denitration method for flue gas Download PDFInfo
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- CN101406803A CN101406803A CNA2008101221203A CN200810122120A CN101406803A CN 101406803 A CN101406803 A CN 101406803A CN A2008101221203 A CNA2008101221203 A CN A2008101221203A CN 200810122120 A CN200810122120 A CN 200810122120A CN 101406803 A CN101406803 A CN 101406803A
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- flue gas
- solution
- absorption liquid
- ultrasonic wave
- denitration
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Links
- 238000000034 method Methods 0.000 title claims abstract description 37
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims description 51
- 239000003546 flue gas Substances 0.000 title claims description 51
- 238000010521 absorption reaction Methods 0.000 claims abstract description 79
- 239000007788 liquid Substances 0.000 claims abstract description 58
- 230000000694 effects Effects 0.000 claims abstract description 6
- HEMHJVSKTPXQMS-UHFFFAOYSA-M sodium hydroxide Inorganic materials [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 20
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 10
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 8
- 230000001590 oxidative effect Effects 0.000 claims description 6
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 4
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 4
- 239000003513 alkali Substances 0.000 claims description 4
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 claims description 4
- 239000000292 calcium oxide Substances 0.000 claims description 3
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 3
- ZKQDCIXGCQPQNV-UHFFFAOYSA-N Calcium hypochlorite Chemical compound [Ca+2].Cl[O-].Cl[O-] ZKQDCIXGCQPQNV-UHFFFAOYSA-N 0.000 claims description 2
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 2
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 2
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims description 2
- 239000004202 carbamide Substances 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- KMUONIBRACKNSN-UHFFFAOYSA-N potassium dichromate Chemical compound [K+].[K+].[O-][Cr](=O)(=O)O[Cr]([O-])(=O)=O KMUONIBRACKNSN-UHFFFAOYSA-N 0.000 claims description 2
- 238000000746 purification Methods 0.000 claims description 2
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 2
- 229960002218 sodium chlorite Drugs 0.000 claims description 2
- 235000010265 sodium sulphite Nutrition 0.000 claims description 2
- UKLNMMHNWFDKNT-UHFFFAOYSA-M sodium chlorite Chemical compound [Na+].[O-]Cl=O UKLNMMHNWFDKNT-UHFFFAOYSA-M 0.000 claims 1
- 229910052979 sodium sulfide Inorganic materials 0.000 claims 1
- GRVFOGOEDUUMBP-UHFFFAOYSA-N sodium sulfide (anhydrous) Chemical compound [Na+].[Na+].[S-2] GRVFOGOEDUUMBP-UHFFFAOYSA-N 0.000 claims 1
- 239000003517 fume Substances 0.000 abstract description 25
- 238000006477 desulfuration reaction Methods 0.000 abstract description 17
- 230000023556 desulfurization Effects 0.000 abstract description 17
- 238000005516 engineering process Methods 0.000 abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 2
- 125000002887 hydroxy group Chemical group [H]O* 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 22
- 229910002651 NO3 Inorganic materials 0.000 description 19
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 19
- 239000006096 absorbing agent Substances 0.000 description 18
- 238000007254 oxidation reaction Methods 0.000 description 17
- 230000003647 oxidation Effects 0.000 description 16
- 238000002604 ultrasonography Methods 0.000 description 16
- 238000004064 recycling Methods 0.000 description 12
- 238000011084 recovery Methods 0.000 description 11
- 239000011575 calcium Substances 0.000 description 7
- 239000011734 sodium Substances 0.000 description 7
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 6
- 230000003197 catalytic effect Effects 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 6
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 5
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 5
- 239000003054 catalyst Substances 0.000 description 5
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 description 5
- 229910052791 calcium Inorganic materials 0.000 description 4
- 230000003009 desulfurizing effect Effects 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 229960002163 hydrogen peroxide Drugs 0.000 description 4
- 229910052708 sodium Inorganic materials 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 239000003245 coal Substances 0.000 description 3
- 239000007800 oxidant agent Substances 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 239000002585 base Substances 0.000 description 2
- ZWWCURLKEXEFQT-UHFFFAOYSA-N dinitrogen pentaoxide Chemical compound [O-][N+](=O)O[N+]([O-])=O ZWWCURLKEXEFQT-UHFFFAOYSA-N 0.000 description 2
- 239000007791 liquid phase Substances 0.000 description 2
- 239000011259 mixed solution Substances 0.000 description 2
- 150000003254 radicals Chemical class 0.000 description 2
- 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 description 1
- 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 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 238000010531 catalytic reduction reaction Methods 0.000 description 1
- 239000013043 chemical agent Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000000975 co-precipitation Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- LZDSILRDTDCIQT-UHFFFAOYSA-N dinitrogen trioxide Chemical compound [O-][N+](=O)N=O LZDSILRDTDCIQT-UHFFFAOYSA-N 0.000 description 1
- XGZRAKBCYZIBKP-UHFFFAOYSA-L disodium;dihydroxide Chemical compound [OH-].[OH-].[Na+].[Na+] XGZRAKBCYZIBKP-UHFFFAOYSA-L 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- -1 hydroxyl radical free radical Chemical class 0.000 description 1
- 230000002779 inactivation Effects 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011858 nanopowder Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Inorganic materials O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 238000007146 photocatalysis Methods 0.000 description 1
- 230000001699 photocatalysis Effects 0.000 description 1
- 239000011941 photocatalyst Substances 0.000 description 1
- 239000012286 potassium permanganate Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- PVGBHEUCHKGFQP-UHFFFAOYSA-N sodium;n-[5-amino-2-(4-aminophenyl)sulfonylphenyl]sulfonylacetamide Chemical compound [Na+].CC(=O)NS(=O)(=O)C1=CC(N)=CC=C1S(=O)(=O)C1=CC=C(N)C=C1 PVGBHEUCHKGFQP-UHFFFAOYSA-N 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
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- Treating Waste Gases (AREA)
Abstract
The invention discloses an ultrasonic fume denitration method. The method comprises the following steps: the fume to be treated is introduced into absorption liquid to be sufficiently contacted with absorption liquid under the action of ultrasonic waves; and the fume is purified and discharged after NOx in the fume is absorbed. The method is characterized in that the ultrasonic waves are adopted to decompose water into hydroxy free radicals with high activity; and NO which accounts for more than 90 percent of the fume is oxidized into NO2. The method can be applied to the process of sequential fume desulfurization and denitration and the process of simultaneous fume desulfurization and denitration, and is a fume denitration technology with low cost and high efficiency.
Description
Technical field
The present invention relates to the air pollution control technique field, be specifically related to a kind of ultrasonic wave denitration method for flue gas, be applicable to fire coal, oil burning boiler and industrial furnace.
Background technology
Coal accounts for the ratio of China's primary energy production and consumption always more than 70%, the NO that produces in the combustion process
xBe the SO that continues
2Demand one of important atmosphere pollution material of administering afterwards urgently.Traditional gas denitrifying technology mainly contains selective catalytic reduction (SCR) and SNCR method (SNCR), though the SCR method can realize very high denitration efficiency, satisfy strict standard limit of smog release, but its technology and device systems complexity, investment and operating cost are very expensive, adaptation to dirty coal is relatively poor, has only the U.S., Germany, Japan and other countries to adopt at present.Serious day by day along with domestic atmosphere pollution situation is to NO
xThe restriction of discharging also will be strict day by day, if domestic power plant introduces the SCR technology again on introducing wet process of FGD basis, investment is difficult to bear under current situation with operating cost, and may not have the place and can arrange.
Oxidation-absorption techniques is to utilize gas phase or liquid phase oxidation agent with flue gas NO
xThe middle less NO of solubility is oxidized to NO
2, N
2O
5Deng, and then absorbing and removing.The difference of various oxidations-absorption denitration technology is the difference of method for oxidation.Method for oxidation mainly comprises: chemical agent oxidation, photochemical catalytic oxidation, heat catalytic oxidation etc.Compare with the SCR technology, the oxidation-investment of absorption denitration technology, operating cost are lower, and absorption liquid can reclaim recycling, and denitration efficiency is higher, are fit to the boiler of various scales.
Publication number is CN1768902, the Chinese invention patent of CN1923341 and CN101053747 has proposed a kind of ozone oxidation and denitration method of boiler flue gas respectively, the wet ammonia flue gas cleaning technology and the system thereof of coal-burning boiler fume ozone oxidation and simultaneous desulfurization denitrification apparatus and method thereof and while desulphurization denitration, adopt ozone respectively, hydrogen peroxide or methyl alcohol become nitrogen dioxide soluble in water as oxidant with the oxidation of nitric oxide in the flue gas, high price such as nitrogen trioxide and dinitrogen pentoxide nitrogen oxide, but ozone, chemical oxidizing agent such as hydrogen peroxide and methyl alcohol consumption is big, and price is higher.
The Chinese invention patent of publication number CN1843575 and CN101053750 has proposed a kind of method of optic catalytic oxidizing, desulfurizing and denitrifying flue gas simultaneously and the method for device and a kind of flue gas combined desulfurization and denitration respectively, the method that adopts photochemical catalytic oxidation is with the NO oxidation in the flue gas, but present photocatalyst activity is lower, and has SO in flue gas
2The time photochemical catalyst easy inactivation.
Publication number is the preparation method that the Chinese invention patent of CN101028596 discloses a kind of oxide nitrogen oxidation catalyst, this catalyst utilizes the method for co-precipitation to prepare manganese base nano-powder oxide catalyst, it is characterized in that having bigger specific area, catalytic oxidation conversion ratio height, when being 200 ℃, the catalytic reaction temperature promptly obtains about 70% catalytic conversion efficiency, when temperature rises to 400 ℃, NO in the waste gas
2/ (NO+NO
2) ratio can be up to 92%.But the composite oxide catalysts that adopted in should inventing is also easily at SO
2Inactivation under the condition that exists is difficult to actual smoke gas treatment.
This shows, adopt oxidation-absorption techniques can effectively remove flue gas NO
x, but oxidation means such as present chemical oxidizing agent oxidation, photocatalysis, thermocatalytic not only need higher operating cost, also are subject to SO in the flue gas
2Influence, the investment and operating cost higher.
Summary of the invention
Deficiency at prior art exists the invention provides a kind of method of utilizing ultrasonic wave to carry out denitrating flue gas.
A kind of ultrasonic wave denitration method for flue gas comprises: pending flue gas feeds absorption liquid, fully contacts the NO in the flue gas with absorption liquid under the ultrasonic wave effect
xBe absorbed the after-purification discharging.
Described frequency of ultrasonic is 20～80KHz, unit absorption liquid (every cubic metre) ultrasonic power 20～100W, and the absorption temperature of absorption liquid is 20～80 ℃.
Described absorption liquid is one or more the mixture in operable alkali lye in the flue-gas denitration process, strong oxidizing property solution and the reducing solution, and the mass percentage concentration of absorption liquid is 0.5%～45%.
Described alkali lye comprises calcium hydroxide Ca (OH)
2, NaOH NaOH, potassium hydroxide KOH, calcium carbonate CaCO
3, calcium oxide CaO, sodium carbonate Na
2CO
3Deng solution.
Described strong oxidizing property solution comprises potassium permanganate KMnO
4, potassium bichromate K
2CrO
4, sodium chlorite NaClO
2, clorox NaClO, calcium hypochlorite Ca (ClO)
2, oxydol H
2O
2Deng solution.
Described reducing solution comprises sodium sulfite Na
2SO
3, urea CO (NH
2)
2, vulcanized sodium Na
2Solution such as S.
The present invention bases oneself upon provides a kind of low cost, high efficiency gas denitrifying technology.Compare with traditional ozone or hydrogen peroxide direct oxidation denitration technology, its characteristics are to adopt ultrasonic wave that water-splitting is become highly active hydroxyl radical free radical, these free radicals not only oxidability are strong, and can also bring out chain reaction, and the NO that accounts in the flue gas more than 90% is oxidized to NO in solution
2, NO
2Water-soluble generation HNO
3, HNO
2, absorb the denitration efficiency that can reach more than 85% in conjunction with liquid phase.Reaction mechanism is as follows:
1) ultrasonic wave is with H
2The O cracking generates free radical
·H+·H→H
2
·OH+·OH→H
2O
2
2) with the reaction of NO
NO+·OH?→HNO
2
NO
2 -/HNO
2+·OH?→NO
2+OH
-/H
2O
NO+·OH→NO
2+·H
NO
2+H
2O→HNO
2+HNO
3
3) and NO
2Reaction
NO
2+·OH→HNO
3
4) H
2O
2Oxidation
H
2O
2+NO
2 -→NO
3 -+H
2O
Method of the present invention can be applied to denitrating technique after the desulfurization of flue gas elder generation, enters desulphurization system behind the flue gas ash removal that coal-burning boiler produces, and removes SO
2After enter the ultrasonic wave effect again the denitration absorber remove NO
x, flue gas qualified discharge after treatment.Desulfurizing byproduct and denitration accessory substance enter sulfate respectively, the nitrate recovery system is carried out recycling; The inventive method also can be applicable to flue gas and desulfurizing and denitrifying technology, and the desulphurization denitration absorber removes SO when directly entering the ultrasonic wave effect behind the flue gas ash removal that coal-burning boiler produces in same reactor
2With NO
x, flue gas qualified discharge after treatment.Accessory substance enters recovery system and carries out recycling.
Description of drawings
Fig. 1 is the process chart of denitration after the first desulfurization of a kind of flue gas;
Fig. 2 is a kind of process chart of flue gas and desulfurizing and denitrifying.
The specific embodiment
Embodiment 1:
Contain 1000ppmNO behind the coal-fired flue gas desulfurization
x, enter ultrasound absorber, ultrasonic frequency 20KHz, every cubic metre of absorption liquid ultrasonic power 40W absorbs 60 ℃ of temperature.Adopt 5% NaOH solution as absorption liquid with NO
xRemove, its absorption efficiency reaches 80%, the fume emission after the processing.Absorption liquid after the denitration enters the nitrate recovery system, carries out recycling, reclaims nitrate.
Embodiment 2:
Contain 900ppmNO behind the coal-fired flue gas desulfurization
x, enter ultrasound absorber, ultrasonic frequency 40KHz, every cubic metre of absorption liquid ultrasonic power 30W absorbs 40 ℃ of temperature.Adopt 10% KOH solution as absorption liquid with NO
xRemove, its absorption efficiency reaches 90%, the fume emission after the processing.Absorption liquid after the denitration enters the nitrate recovery system, carries out recycling, reclaims nitrate.
Embodiment 3:
Contain 2000ppmNO behind the coal-fired flue gas desulfurization
x, enter ultrasound absorber, ultrasonic frequency 50KHz, every cubic metre of absorption liquid ultrasonic power 60W absorbs 70 ℃ of temperature.Adopt 20% Ca (OH)
2Solution as absorption liquid with NO
xRemove, its absorption efficiency reaches 85%, the fume emission after the processing.Absorption liquid after the denitration enters the nitrate recovery system, carries out recycling, reclaims nitrate.
Embodiment 4:
Contain 3000ppmNO behind the coal-fired flue gas desulfurization
x, enter ultrasound absorber, ultrasonic frequency 70KHz, every cubic metre of absorption liquid ultrasonic power 75W absorbs 60 ℃ of temperature.Adopt 5% Na
2CO
3Solution as absorption liquid with NO
xRemove, its absorption efficiency reaches 90%, the fume emission after the processing.Absorption liquid after the denitration enters the nitrate recovery system, carries out recycling, reclaims nitrate.
Embodiment 5:
Contain 800ppmNO behind the coal-fired flue gas desulfurization
x, enter ultrasound absorber, ultrasonic frequency 30KHz, every cubic metre of absorption liquid ultrasonic power 90W absorbs 80 ℃ of temperature.Adopt 15% CaCO
3Solution as absorption liquid with NO
xRemove, its absorption efficiency reaches 80%, the fume emission after the processing.Absorption liquid after the denitration enters the nitrate recovery system, carries out recycling, reclaims nitrate.
Embodiment 6:
Contain 800ppmNO behind the coal-fired flue gas desulfurization
x, enter ultrasound absorber, ultrasonic frequency 20KHz, the absorption liquid ultrasonic power 40W of unit absorbs 50 ℃ of temperature.Adopt 5% Ca (ClO)
2Solution as absorption liquid with NO
xRemove, its absorption efficiency reaches 80%, the fume emission after the processing.Absorption liquid after the denitration enters the nitrate recovery system, carries out recycling, reclaims nitrate.
Embodiment 7:
Contain 1600ppmNO behind the coal-fired flue gas desulfurization
x, enter ultrasound absorber, ultrasonic frequency 25KHz, every cubic metre of absorption liquid ultrasonic power 20W absorbs 60 ℃ of temperature.Adopt 2% NaClO
2Solution as absorption liquid with NO
xRemove, its absorption efficiency reaches 82%, the fume emission after the processing.Absorption liquid after the denitration enters the nitrate recovery system, carries out recycling, reclaims nitrate.
Embodiment 8:
Contain 2200ppmNO behind the coal-fired flue gas desulfurization
x, enter ultrasound absorber, ultrasonic frequency 50KHz, every cubic metre of absorption liquid ultrasonic power 50W absorbs 40 ℃ of temperature.Adopt 12% NaClO solution as absorption liquid with NO
xRemove, its absorption efficiency reaches 89%, the fume emission after the processing.Absorption liquid after the denitration enters the nitrate recovery system, carries out recycling, reclaims nitrate.
Embodiment 9:
Contain 1200ppmNO behind the coal-fired flue gas desulfurization
x, enter ultrasound absorber, ultrasonic frequency 20KHz, every cubic metre of absorption liquid ultrasonic power 20W absorbs 70 ℃ of temperature.Adopt 3% H
2O
2Solution as absorption liquid with NO
xRemove, its absorption efficiency reaches 83%, the fume emission after the processing.Absorption liquid after the denitration enters the nitrate recovery system, carries out recycling, reclaims nitrate.
Embodiment 10:
Contain 2500ppmNO behind the coal-fired flue gas desulfurization
x, enter ultrasound absorber, ultrasonic frequency 60KHz, every cubic metre of absorption liquid ultrasonic power 60W absorbs 70 ℃ of temperature.Adopt 20% CO (NH
2)
2Solution as absorption liquid with NO
xRemove, its absorption efficiency reaches 90%, the fume emission after the processing.
Embodiment 11:
Contain 1500ppmNO behind the coal-fired flue gas desulfurization
x, enter ultrasound absorber, ultrasonic frequency 50KHz, every cubic metre of absorption liquid ultrasonic power 60W absorbs 40 ℃ of temperature.Adopt 5% Na
2SO
3Solution as absorption liquid with NO
xRemove, its absorption efficiency reaches 90%, the fume emission after the processing.
Embodiment 12:
Coal-fired flue-gas contains 3000ppmSO
2, 1200ppmNO
x, enter ultrasound absorber, ultrasonic frequency 40KHz, every cubic metre of absorption liquid ultrasonic power 80W absorbs 70 ℃ of temperature.Adopt 20% Ca (OH)
2Solution as absorption liquid with SO
2, NO
xRemove, its absorption efficiency reaches 90%, 83% respectively, the fume emission after the processing.
Embodiment 13:
Coal-fired flue-gas contains 5000ppmSO
2, 1000ppmNO
x, enter ultrasound absorber, ultrasonic frequency 60KHz, every cubic metre of absorption liquid ultrasonic power 80W absorbs 75 ℃ of temperature.Adopt 5% NaOH solution as absorption liquid with SO
2, NO
xRemove, its absorption efficiency reaches 94%, 85% respectively, the fume emission after the processing.
Embodiment 14:
Coal-fired flue-gas contains 2000ppmSO
2, 1500ppmNO
x, enter ultrasound absorber, ultrasonic frequency 30KHz, every cubic metre of absorption liquid ultrasonic power 60W absorbs 55 ℃ of temperature.Adopt 5% Na
2CO
3Solution as absorption liquid with SO
2, NO
xRemove, its absorption efficiency reaches 89%, 75% respectively, the fume emission after the processing.
Embodiment 15:
Coal-fired flue-gas contains 1800ppmSO
2, 900ppmNO
x, enter ultrasound absorber, ultrasonic frequency 20KHz, the absorption liquid ultrasonic power 55W of unit absorbs 65 ℃ of temperature.Adopt 3% Ca (OH)
2+ Ca (ClO)
2Mixed solution as absorption liquid with SO
2, NO
xRemove, its absorption efficiency reaches 95%, 85% respectively, the fume emission after the processing.
Embodiment 16:
Coal-fired flue-gas contains 2700ppmSO
2, 1100ppmNO
x, enter ultrasound absorber, ultrasonic frequency 30KHz, every cubic metre of absorption liquid ultrasonic power 30W absorbs 50 ℃ of temperature.Adopt 5% NaOH+CO (NH
2)
2Mixed solution as absorption liquid with SO
2, NO
xRemove, its absorption efficiency reaches 95%, 81% respectively, the fume emission after the processing.
Claims (6)
1, a kind of ultrasonic wave denitration method for flue gas comprises: pending flue gas feeds absorption liquid, fully contacts the after-purification discharging with absorption liquid, it is characterized in that: in the absorption liquid under the effect of pending flue gas feeding ultrasonic wave, and fully contact.
2, ultrasonic wave denitration method for flue gas as claimed in claim 1 is characterized in that: described frequency of ultrasonic is 20～80KHz, every cubic metre of absorption liquid ultrasonic power 20～100W, and the absorption temperature of absorption liquid is 20～80 ℃.
3, ultrasonic wave denitration method for flue gas as claimed in claim 1 is characterized in that: described absorption liquid is one or more the mixture in alkali lye, strong oxidizing property solution, the reducing solution, and the mass percentage concentration of absorption liquid is 0.5%～45%.
4, ultrasonic wave denitration method for flue gas as claimed in claim 3 is characterized in that: described alkali lye is aqua calcis, sodium hydroxide solution, potassium hydroxide solution, calcium carbonate soln, calcium oxide solution or sodium carbonate liquor.
5, ultrasonic wave denitration method for flue gas as claimed in claim 3 is characterized in that: described strong oxidizing property solution is liquor potassic permanganate, potassium bichromate solution, sodium chlorite solution, liquor natrii hypochloritis, calcium hypochlorite solution or hydrogen peroxide solution.
6, ultrasonic wave denitration method for flue gas as claimed in claim 3 is characterized in that: described reducing solution is sodium sulfite solution, urea liquid or sodium sulfide solution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101221203A CN101406803A (en) | 2008-10-28 | 2008-10-28 | Ultrasonic wave denitration method for flue gas |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101221203A CN101406803A (en) | 2008-10-28 | 2008-10-28 | Ultrasonic wave denitration method for flue gas |
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| Publication Number | Publication Date |
|---|---|
| CN101406803A true CN101406803A (en) | 2009-04-15 |
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ID=40570126
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|---|---|---|---|
| CNA2008101221203A Pending CN101406803A (en) | 2008-10-28 | 2008-10-28 | Ultrasonic wave denitration method for flue gas |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN103170228A (en) * | 2013-04-15 | 2013-06-26 | 武汉大学 | Mixed solution for flue gas denitrification and application method of mixed solution |
| CN103170228B (en) * | 2013-04-15 | 2016-01-13 | 武汉大学 | A kind of denitrating flue gas mixed solution and application process thereof |
| CN104353332A (en) * | 2014-10-22 | 2015-02-18 | 天津中材工程研究中心有限公司 | Auxiliary for reducing cement denitration urea consumption |
| CN104511240A (en) * | 2014-12-10 | 2015-04-15 | 金川集团股份有限公司 | Treatment method for nitrogen oxide waste gas |
| CN105169906A (en) * | 2015-09-17 | 2015-12-23 | 昆明理工大学 | Method for injecting sodium sulfide into ozone to denitrate |
| CN106853329A (en) * | 2016-03-11 | 2017-06-16 | 济南大学 | Ozone for low-temperature denitration of flue gas generates the method and device of hydroxyl radical free radical |
| CN106853329B (en) * | 2016-03-11 | 2024-02-09 | 济南大学 | Method and device for generating hydroxyl free radical by ozone for low-temperature flue gas denitration |
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| CN107198949A (en) * | 2017-06-27 | 2017-09-26 | 苏州克莱尔环保科技有限公司 | A kind of tail gas desulfurization device |
| CN107441907A (en) * | 2017-08-14 | 2017-12-08 | 江苏科行环保科技有限公司 | A kind of material boiler smoke multi-pollutant handling process and equipment |
| CN107648995A (en) * | 2017-11-06 | 2018-02-02 | 济南大学 | A kind of environment protection, low cost flue gas desulfurization and denitrification agent and its preparation method and application |
| CN110449023A (en) * | 2019-08-12 | 2019-11-15 | 辽宁锐莱德科技有限公司 | Denitrfying agent and preparation method thereof |
| CN110585868A (en) * | 2019-10-12 | 2019-12-20 | 沈洪彬 | Preparation and application of dry-wet dual-purpose flue gas desulfurization and denitrification agent |
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