CN109647175A - A kind of cyanuric acid denitrfying agent and its preparation method and application - Google Patents
A kind of cyanuric acid denitrfying agent and its preparation method and application Download PDFInfo
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- CN109647175A CN109647175A CN201910051317.0A CN201910051317A CN109647175A CN 109647175 A CN109647175 A CN 109647175A CN 201910051317 A CN201910051317 A CN 201910051317A CN 109647175 A CN109647175 A CN 109647175A
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- China
- Prior art keywords
- cyanuric acid
- denitrfying agent
- mesh
- urea
- partial size
- Prior art date
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- ZFSLODLOARCGLH-UHFFFAOYSA-N isocyanuric acid Chemical compound OC1=NC(O)=NC(O)=N1 ZFSLODLOARCGLH-UHFFFAOYSA-N 0.000 title claims abstract description 92
- 239000003795 chemical substances by application Substances 0.000 title claims abstract description 64
- 238000002360 preparation method Methods 0.000 title claims abstract description 16
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims abstract description 54
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims abstract description 35
- 239000004202 carbamide Substances 0.000 claims abstract description 35
- 239000000945 filler Substances 0.000 claims abstract description 30
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims abstract description 18
- 238000010438 heat treatment Methods 0.000 claims abstract description 13
- 229940123134 Nitric oxide inhibitor Drugs 0.000 claims abstract description 12
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims abstract description 8
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 8
- 238000001816 cooling Methods 0.000 claims abstract description 8
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910000019 calcium carbonate Inorganic materials 0.000 claims abstract description 4
- 239000000395 magnesium oxide Substances 0.000 claims abstract description 3
- 229910003145 α-Fe2O3 Inorganic materials 0.000 claims description 39
- 239000000203 mixture Substances 0.000 claims description 24
- 229910000859 α-Fe Inorganic materials 0.000 claims description 12
- 239000012265 solid product Substances 0.000 claims description 10
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 238000012423 maintenance Methods 0.000 claims description 2
- 238000012545 processing Methods 0.000 claims description 2
- 239000000779 smoke Substances 0.000 claims description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 9
- 230000008569 process Effects 0.000 abstract description 5
- 238000003860 storage Methods 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000007873 sieving Methods 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 10
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 10
- 239000007789 gas Substances 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 8
- 238000003916 acid precipitation Methods 0.000 description 7
- 230000003647 oxidation Effects 0.000 description 7
- 238000007254 oxidation reaction Methods 0.000 description 7
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 6
- 229910052742 iron Inorganic materials 0.000 description 5
- 229910002089 NOx Inorganic materials 0.000 description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 3
- 239000003344 environmental pollutant Substances 0.000 description 3
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 description 3
- 239000000347 magnesium hydroxide Substances 0.000 description 3
- 229910001862 magnesium hydroxide Inorganic materials 0.000 description 3
- -1 methane Chemical class 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 231100000719 pollutant Toxicity 0.000 description 3
- 230000006641 stabilisation Effects 0.000 description 3
- 238000011105 stabilization Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 229910052717 sulfur Inorganic materials 0.000 description 3
- 239000011593 sulfur Substances 0.000 description 3
- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical compound S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 2
- OWIKHYCFFJSOEH-UHFFFAOYSA-N Isocyanic acid Chemical compound N=C=O OWIKHYCFFJSOEH-UHFFFAOYSA-N 0.000 description 2
- GQPLMRYTRLFLPF-UHFFFAOYSA-N Nitrous Oxide Chemical compound [O-][N+]#N GQPLMRYTRLFLPF-UHFFFAOYSA-N 0.000 description 2
- 239000005864 Sulphur Substances 0.000 description 2
- XLJMAIOERFSOGZ-UHFFFAOYSA-N anhydrous cyanic acid Natural products OC#N XLJMAIOERFSOGZ-UHFFFAOYSA-N 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000006477 desulfuration reaction Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000002803 fossil fuel Substances 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 229910017464 nitrogen compound Inorganic materials 0.000 description 2
- 150000002830 nitrogen compounds Chemical class 0.000 description 2
- JMANVNJQNLATNU-UHFFFAOYSA-N oxalonitrile Chemical compound N#CC#N JMANVNJQNLATNU-UHFFFAOYSA-N 0.000 description 2
- 230000000284 resting effect Effects 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- AKEJUJNQAAGONA-UHFFFAOYSA-N sulfur trioxide Chemical compound O=S(=O)=O AKEJUJNQAAGONA-UHFFFAOYSA-N 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- 239000011701 zinc Substances 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
- HLSCJPDXQCURMT-UHFFFAOYSA-N 7,9-dihydro-3H-purine-2,6,8-trione oxalonitrile Chemical compound N1C(=O)NC=2NC(=O)NC2C1=O.N#CC#N HLSCJPDXQCURMT-UHFFFAOYSA-N 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 235000019738 Limestone Nutrition 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- LEHOTFFKMJEONL-UHFFFAOYSA-N Uric Acid Chemical compound N1C(=O)NC(=O)C2=C1NC(=O)N2 LEHOTFFKMJEONL-UHFFFAOYSA-N 0.000 description 1
- TVWHNULVHGKJHS-UHFFFAOYSA-N Uric acid Natural products N1C(=O)NC(=O)C2NC(=O)NC21 TVWHNULVHGKJHS-UHFFFAOYSA-N 0.000 description 1
- VVTSZOCINPYFDP-UHFFFAOYSA-N [O].[Ar] Chemical compound [O].[Ar] VVTSZOCINPYFDP-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 150000001335 aliphatic alkanes Chemical class 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- LZDSILRDTDCIQT-UHFFFAOYSA-N dinitrogen trioxide Chemical compound [O-][N+](=O)N=O LZDSILRDTDCIQT-UHFFFAOYSA-N 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 150000002632 lipids Chemical class 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000002075 main ingredient Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 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
- 239000001272 nitrous oxide Substances 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 150000003254 radicals Chemical class 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 229940116269 uric acid Drugs 0.000 description 1
- 239000002912 waste gas 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
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/81—Solid phase processes
-
- 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
- B01D53/54—Nitrogen compounds
- B01D53/56—Nitrogen oxides
- B01D53/565—Nitrogen oxides by treating the gases with solids
Abstract
The present invention discloses a kind of cyanuric acid denitrfying agent, which includes following components: cyanuric acid, iron oxide, ferrous oxide, nitric oxide inhibitor and filler；Nitric oxide inhibitor is that perhaps two kinds of fillers are one of calcium carbonate or magnesia or two kinds for one of metallic copper powder and metallic zinc powder.The invention also discloses the preparation methods of above-mentioned cyanuric acid denitrfying agent, comprising: and urea is uniformly mixed with iron oxide, is reacted in 220-280 DEG C of heating, it is cooling, it crushes, ferrous oxide, nitric oxide inhibitor and filler is added after sieving, be uniformly mixed.The present invention also provides the applications of above-mentioned cyanuric acid denitrfying agent.Cyanuric acid denitrfying agent denitration temperature of the invention is wide, and denitration efficiency is up to 90% or more, is safe from danger in production, storage, transport, use process, and validity period can reach 2 years or more.
Description
Technical field
The present invention relates to a kind of exhaust gas denitration technical fields, and in particular to a kind of cyanuric acid denitrfying agent and preparation method thereof and
Using.
Background technique
Under natural conditions, the main ingredient for removing the air of aqueous vapor and impurity is: nitrogen 78.09%, 20.94% and of oxygen
Argon gas 0.93%, remaining each component content is less than 0.1%.In clean atmosphere, the composition of trace gas be it is inappreciable,
However, there is originally no micro substance in being growing with industrially scalable in atmosphere, when its content is higher, holds
When continuous time is longer, it is likely to generate harm to people, animal, plant and ecological environment.The concentration of polluter reaches in atmosphere
To the level for destroying the ecosystem, mankind's normal existence and development, the phenomenon that causing damages to people or object, is called atmosphere pollution.It makes
At mainly human factor, such as the discharge of industrial waste gas, fossil fuel combustion waste gas and vehicle exhaust the reason of atmosphere pollution.
Atmosphere pollution is broadly divided into natural pollutant and man-made pollutant, causes the mainly man-made pollutant of public hazards, mainly comes
It is discharged derived from combustion of fossil fuel and the exhaust gas of extensive industrial and mining enterprises.Atmosphere pollution include particulate matter, oxysulfide (including
Sulfur dioxide, sulfur trioxide, sulfur sesquioxide and sulfur monoxide etc.), oxycarbide (mainly include carbon dioxide and one oxidation
Carbon), nitrogen oxides (including nitrous oxide, Lipid perxide, nitrogen dioxide and nitrogen trioxide), hydrocarbon (such as methane, second
The hydrocarbon gas such as alkane) and other harmful substances matter (such as heavy metal classes, fluoro-gas and chlorine-containing gas).Sulphur compound in atmosphere
It is the main component to form acid rain with nitrogen compound, acid rain caused by sulphur compound and nitrogen compound accounts for the exhausted of total quantity in acid rain
It is most of.China is the maximum country of SO2 emissions in the world, and only the SO2 emissions in China in 2010 just reach
To 2185.1 ten thousand tons.Acid Rain Pollution caused by sulfur dioxide (SO2) emissions constantly expands, and the gesture of sharply sprawling is just being presented in China's acid rain, is
The Acid Rain Zone third place in the world great Chong after America and Europe, control of acid rain are that the mankind move towards must solve in sustainable development process weight
Overall situation problem.
Currently, specifically including that lime stone/stone in the common sulfur removal technology that thermal power plant, chemical plant and garbage burning factory use
Ash-gypsum wet technique, circulating fluidized bed desulfurization technique, in-furnace calcium spraying tail portion humidifying process, rotary spraying and drying technique and work
Property charcoal absorbing process.However, existing sulfur removal technology has that desulfuration efficiency is not high, the device is complicated mostly.
Summary of the invention
That the object of the present invention is to provide a kind of denitration temperature is wide, denitration efficiency is high, stability is high and the lower cyanogen of risk
Uric acid denitrfying agent.
Another object of the present invention is to provide the preparation method and application of above-mentioned cyanuric acid denitrfying agent.
Technical solution: the present invention provides a kind of cyanuric acid denitrfying agent, which includes following parts by weight
Component: 20-70 parts of cyanuric acid, α-Fe2O32-7 parts, 0.1-5 parts of ferrous oxide, 0.1-5 parts of nitric oxide inhibitor and filler 20-
30 parts, nitric oxide inhibitor is one or both of metallic copper powder and metallic zinc powder, and filler is calcium carbonate and oxidation
One or both of magnesium.
In order to improve the denitration efficiency of cyanuric acid denitrfying agent, preferably make α-Fe2O3Partial size be 50-1000 mesh；The grain of filler
Diameter is 50-1000 mesh；Further, it is preferable to make α-Fe2O3Partial size be 200-400 mesh；The partial size of filler is 400-800 mesh；Oxygen
Changing ferrous partial size is 100-400 mesh, and the partial size of the nitric oxide inhibitor is 200-400 mesh.
Cyanuric acid resolves into isocyanic acid at high temperature in above-mentioned cyanuric acid denitrfying agent, and the isocyanic acid of generation is in hydrogen and hydrogen-oxygen
NCO and NH are quickly converted under the action of free radical2Two kinds of free radicals, can effectively restore NO；It is demonstrated experimentally that α-Fe2O3
It can act synergistically with cyanuric acid so that denitration efficiency is higher and temperature range is wider, thus it is speculated that be due to α-Fe2O3Catalyzing urea is raw
At the cyanuric acid of special crystal form；Ferrous oxide can be catalyzed cyanuric acid and oxynitrides reaction, metallic copper powder and metallic zinc
The conversion for the nitrogen oxides that powder can promote as nitric oxide inhibitor improves transformation efficiency；Calcium carbonate or magnesia are made
Flue gas and the catalytic area of cyanuric acid denitrfying agent can be increased for more stable filler, improves denitration efficiency.
Another aspect of the present invention provides the preparation method of above-mentioned cyanuric acid denitrfying agent, comprising the following steps:
1) by urea and α-Fe2O3It is uniformly mixed, the urea and α-Fe made2O3Mixture in, the weight of urea contains
Amount is 90-99.99%, α-Fe2O3Weight content be 0.01%-10%；
2) by urea made from step 1) and α-Fe2O3Mixture reacted 0.1-2 hours in 220-280 DEG C of heating, it is cold
But, obtained solid product is crushed, crosses 50-1000 mesh to get cyanuric acid and α-Fe2O3Mixture；
3) ferrous oxide, nitric oxide inhibitor and filler are added into step 2) cyanuric acid, is uniformly mixed to get cyanogen
Uric acid denitrfying agent.
In step 1), in the mixture of urea and iron oxide, the weight content of urea is preferably 90-95%, α-Fe2O3's
Weight content is preferably 5-10%；α-Fe2O3Partial size be preferably 200-400 mesh.
In step 2), the temperature for heating reaction is preferably 240-260 DEG C, and the time for heating reaction is preferably 0.25-1 small
When；It is preferred to cross 200-400 mesh after obtained solid product is crushed.
Another aspect of the present invention provides above-mentioned cyanuric acid denitrfying agent answering in industrial smoke processing or vehicle maintenance service
With.
The utility model has the advantages that cyanuric acid denitrfying agent denitration temperature of the invention is wider, can be carried out within the scope of 450-1100 DEG C
Denitration, and efficiency is up to 90% or more；The cyanuric acid denitrfying agent is non-dangerous article, in production, storage, transport, use process
It is safe from danger；The cyanuric acid denitrfying agent is stablized, and validity period can reach 2 years or more.
Specific embodiment
Embodiment 1
Cyanuric acid denitrfying agent includes the component of following weight content: 45 parts of cyanuric acid, α-Fe2O37 parts, ferrous oxide 0.1
Part, 1 part of metallic copper powder and 30 parts of pearl filler.α-Fe2O3Partial size be 200 mesh；The partial size of filler is 400 mesh；Oxidation is sub-
The partial size of iron is 100 mesh, and the partial size of metallic copper powder is 200 mesh.
The preparation method of above-mentioned cyanuric acid denitrfying agent the following steps are included:
It 1) is the α-Fe of 200 mesh by urea and partial size2O3It is uniformly mixed, the urea and α-Fe made2O3Mixture
In, the weight content of urea is 90%, α-Fe2O3Weight content be 10%；
2) urea made from step 1) is reacted 1 hour with the mixture of iron oxide in 240 DEG C of heating, it is cooling, it will obtain
Solid product crush, cross 200 meshes, obtain cyanuric acid and α-Fe2O3Mixture；
3) according to the weight content of each component in above-mentioned cyanuric acid denitrfying agent, it is sub- that oxidation is added into step 2) cyanuric acid
Iron, metallic copper powder and partial size are 400 mesh pearl fillers, are uniformly mixed to get cyanuric acid denitrfying agent.
Embodiment 2
Cyanuric acid denitrfying agent includes the component of following weight content: 26 parts of cyanuric acid, α-Fe2O32 parts, 1 part of ferrous oxide,
0.1 part and 20 parts of magnesium hydroxide filler of metallic zinc powder.α-Fe2O3Partial size be 400 mesh；The partial size of magnesium hydroxide filler is 800 mesh；
The partial size of ferrous oxide is 400 mesh, and the partial size of metallic copper powder is 400 mesh.
The preparation method of above-mentioned cyanuric acid denitrfying agent the following steps are included:
It 1) is the α-Fe of 400 mesh by urea and partial size2O3It is uniformly mixed, the urea and α-Fe made2O3Mixture
In, the weight content of urea is 95%, α-Fe2O3Weight content be 5%；
2) urea made from step 1) is reacted 2 hours with the mixture of iron oxide in 220 DEG C of heating, it is cooling, it will obtain
Solid product crush, cross 400 meshes, obtain cyanuric acid and α-Fe2O3Mixture；
3) according to the weight content of each component in above-mentioned cyanuric acid denitrfying agent, it is sub- that oxidation is added into step 2) cyanuric acid
Iron, metallic zinc powder and partial size are 800 mesh magnesium hydroxide fillers, are uniformly mixed to get cyanuric acid denitrfying agent.
Embodiment 3
Cyanuric acid denitrfying agent includes the component of following weight content: 67 parts of cyanuric acid, α-Fe2O35 parts, 5 parts of ferrous oxide,
3 parts and 25 parts of pearl filler of metallic zinc powder.α-Fe2O3Partial size be 600 mesh；The partial size of pearl filler is 1000 mesh；Oxygen
Changing ferrous partial size is 400 mesh, and the partial size of metallic zinc powder is 300 mesh.
The preparation method of above-mentioned cyanuric acid denitrfying agent the following steps are included:
It 1) is the α-Fe of 400 mesh by urea and partial size2O3It is uniformly mixed, the urea and α-Fe made2O3Mixture
In, the weight content of urea is 95%, α-Fe2O3Weight content be 5%；
2) urea made from step 1) is reacted 0.25 hour with the mixture of iron oxide in 260 DEG C of heating, it is cooling, will
The solid product arrived crushes, and crosses 600 meshes, obtains cyanuric acid and α-Fe2O3Mixture；
3) according to the weight content of each component in above-mentioned cyanuric acid denitrfying agent, it is sub- that oxidation is added into step 2) cyanuric acid
Iron, metallic zinc powder and partial size are 600 mesh pearl fillers, are uniformly mixed to get cyanuric acid denitrfying agent.
Comparative example 1
For cyanuric acid denitrfying agent in addition to not including ferrous oxide, remaining is same as Example 3:
Cyanuric acid denitrfying agent includes the component of following weight content: 67 parts of cyanuric acid, α-Fe2O35 parts, 3 parts of metallic zinc powder
With 25 parts of pearl filler.α-Fe2O3Partial size be 600 mesh；The partial size of pearl filler is 1000 mesh；The grain of metallic zinc powder
Diameter is 300 mesh.
The preparation method of above-mentioned cyanuric acid denitrfying agent the following steps are included:
It 1) is the α-Fe of 400 mesh by urea and partial size2O3It is uniformly mixed, the urea and α-Fe made2O3Mixture
In, the weight content of urea is 95%, α-Fe2O3Weight content be 5%；
2) urea made from step 1) is reacted 0.25 hour with the mixture of iron oxide in 260 DEG C of heating, it is cooling, will
The solid product arrived crushes, and crosses 600 meshes, obtains cyanuric acid and α-Fe2O3Mixture；
3) according to the weight content of each component in above-mentioned cyanuric acid denitrfying agent, metal zinc is added into step 2) cyanuric acid
End and partial size are 600 mesh pearl fillers, are uniformly mixed to get cyanuric acid denitrfying agent.
Comparative example 2
For cyanuric acid denitrfying agent in addition to not including filler, remaining is same as Example 3:
Cyanuric acid denitrfying agent includes the component of following weight content: 67 parts of cyanuric acid, α-Fe2O35 parts, 5 parts of ferrous oxide and
3 parts of metallic zinc powder.α-Fe2O3Partial size be 600 mesh；The partial size of ferrous oxide is 400 mesh, and the partial size of metallic zinc powder is 300
Mesh.
The preparation method of above-mentioned cyanuric acid denitrfying agent the following steps are included:
It 1) is the α-Fe of 400 mesh by urea and partial size2O3It is uniformly mixed, the urea and α-Fe made2O3Mixture
In, the weight content of urea is 95%, α-Fe2O3Weight content be 5%；
2) urea made from step 1) is reacted 0.25 hour with the mixture of iron oxide in 260 DEG C of heating, it is cooling, will
The solid product arrived crushes, and crosses 600 meshes, obtains cyanuric acid and α-Fe2O3Mixture；
3) according to the weight content of each component in above-mentioned cyanuric acid denitrfying agent, ferrous oxide is added into step 2) cyanuric acid
With metallic zinc powder, it is uniformly mixed to get cyanuric acid denitrfying agent.
Comparative example 3
For cyanuric acid denitrfying agent in addition to not including iron oxide, remaining is same as Example 3:
Cyanuric acid denitrfying agent includes the component of following weight content: 67 parts of cyanuric acid, 5 parts of ferrous oxide, metallic zinc powder 3
Part and 25 parts of pearl filler.The partial size of pearl filler is 1000 mesh；The partial size of ferrous oxide is 400 mesh, metallic zinc powder
Partial size be 300 mesh.
The preparation method of above-mentioned cyanuric acid denitrfying agent the following steps are included:
1) urea is reacted 0.25 hour in 260 DEG C of heating, it is cooling, obtained solid product is crushed, 600 meshes are crossed,
Obtain cyanuric acid；
3) according to the weight content of each component in above-mentioned cyanuric acid denitrfying agent, it is sub- that oxidation is added into step 1) cyanuric acid
Iron, metallic zinc powder and partial size are 600 mesh pearl fillers, are uniformly mixed to get cyanuric acid denitrfying agent.
Embodiment 4
(1) the minimum denitration temperature and highest denitration efficiency of cyanuric acid denitrfying agent are tested:
Cyanuric acid denitrfying agent prepared by embodiment 1,2,3 and comparative example 1,2,3 respectively with the NO gas containing 1000ppm
Body is mixed, and subsequently into the reactor for setting temperature, is carried out the concentration of detection NOx in reactor exit, is worked as outlet
The concentration of the NOx at place is considered as when being less than 950ppm denitration effect.
Minimum denitration temperature refers to that cyanuric acid denitrfying agent has the minimum temperature of denitration effect；
Highest denitration efficiency refers to that the highest denitration efficiency that cyanuric acid denitrfying agent can reach, denitration efficiency=1- are (anti-
Answer device exit NOx concentration/1000ppm).Test result is as shown in table 1.
(2) the stabilization resting period of cyanuric acid denitrfying agent is tested
Cyanuric acid denitrfying agent prepared by embodiment 1,2,3 and comparative example 1,2,3 is put into 54 degrees Celsius of baking ovens to be added
Speed experiment.It detects the content of the cyanuric acid before being put into and after being put into respectively according to national standard, then calculates the rate of descent of content,
It is considered as stabilization when rate of descent is less than 10%.Stablizing storage under 54 degrees Celsius then indicates a Nian Wending in 14 days, under 54 degrees Celsius
Stablizing storage 28 days then indicates 2 years stabilizations.Test result is as shown in table 1.
Table 1
| Minimum denitration temperature | Highest denitration efficiency | Stablize the resting period | |
| Embodiment 1 | 475℃ | 75.3% | 2 years |
| Embodiment 2 | 475℃ | 89.5% | 2 years |
| Embodiment 3 | 450℃ | 95.2% | 2 years |
| Comparative example 1 | 475℃ | 65.8% | 2 years |
| Comparative example 2 | 475℃ | 61.5% | 2 years |
| Comparative example 3 | 600℃ | 48.6% | 1 year |
It can be seen that cyanuric acid denitrfying agent of the invention under equal conditions according to the data in table 1, denitration efficiency is more
It is good, higher, it is with a wide range of applications.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all in spirit of the invention and
Within principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (9)
1. a kind of cyanuric acid denitrfying agent, which is characterized in that the cyanuric acid denitrfying agent includes the component of following parts by weight: cyanuric acid
20-70 parts, α-Fe2O32-7 parts, 0.1-5 parts of ferrous oxide, 0.1-5 parts of nitric oxide inhibitor and 20-30 parts of filler, it is described
Nitric oxide inhibitor is one or both of metallic copper powder and metallic zinc powder, and the filler is calcium carbonate and magnesia
One or both of.
2. cyanuric acid denitrfying agent according to claim 1, which is characterized in that the α-Fe2O3Partial size be 50-1000 mesh,
The partial size of the filler is 50-1000 mesh.
3. cyanuric acid denitrfying agent according to claim 2, which is characterized in that the α-Fe2O3Partial size be 200-400 mesh,
The partial size of the filler is 400-800 mesh.
4. cyanuric acid denitrfying agent according to claim 1, which is characterized in that the partial size of the ferrous oxide is 100-400
Mesh, the partial size of the nitric oxide inhibitor are 200-400 mesh.
5. the preparation method of cyanuric acid denitrfying agent described in a kind of any one of Claims 1 to 4, which is characterized in that including
Following steps:
1) by urea and α-Fe2O3It is uniformly mixed, the urea and α-Fe made2O3Mixture in, the weight content of urea is
90-99.99%, α-Fe2O3Weight content be 0.01%-10%；
2) by urea made from step 1) and a-Fe2O3Mixture reacted 0.1-2 hour in 220-280 DEG C of heating, cooling, general
Obtained solid product crushes, and crosses 50-1000 mesh, obtains cyanuric acid and α-Fe2O3Mixture；
3) ferrous oxide, nitric oxide inhibitor and filler are added into cyanuric acid made from step 2), is uniformly mixed to get institute
State cyanuric acid denitrfying agent.
6. the preparation method of cyanuric acid denitrfying agent according to claim 5, which is characterized in that in step 1), the urea
With α-Fe2O3Mixture in, the weight content of urea is 90-95%, α-Fe2O3Weight content be 5-10%.
7. the preparation method of cyanuric acid denitrfying agent according to claim 5, which is characterized in that in step 2), the heating
The temperature of reaction is 240-260 DEG C, and the time of the heating reaction is 0.25-1 hours.
8. the preparation method of cyanuric acid denitrfying agent according to claim 5, which is characterized in that in step 2), by what is obtained
The solid product smashes it through 200-400 mesh.
9. cyanuric acid denitrfying agent described in any one of Claims 1 to 4 is in industrial smoke processing or vehicle maintenance service
Application.
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| CN114272752A (en) * | 2022-01-27 | 2022-04-05 | 江苏扬农化工集团有限公司 | Organic coated denitration agent and preparation method thereof |
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