CN114367179B - Denitration carbon fixing agent using steel slag as raw material and preparation method and application thereof - Google Patents
Denitration carbon fixing agent using steel slag as raw material and preparation method and application thereof Download PDFInfo
- Publication number
- CN114367179B CN114367179B CN202111472123.1A CN202111472123A CN114367179B CN 114367179 B CN114367179 B CN 114367179B CN 202111472123 A CN202111472123 A CN 202111472123A CN 114367179 B CN114367179 B CN 114367179B
- Authority
- CN
- China
- Prior art keywords
- agent
- denitration
- steel slag
- stabilizer
- carbon
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000003795 chemical substances by application Substances 0.000 title claims abstract description 105
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 100
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 90
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 84
- 239000010959 steel Substances 0.000 title claims abstract description 84
- 239000002893 slag Substances 0.000 title claims abstract description 82
- 239000002994 raw material Substances 0.000 title claims abstract description 22
- 238000002360 preparation method Methods 0.000 title abstract description 9
- 239000003381 stabilizer Substances 0.000 claims abstract description 60
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 44
- 238000002485 combustion reaction Methods 0.000 claims abstract description 40
- 239000008139 complexing agent Substances 0.000 claims abstract description 40
- 239000003999 initiator Substances 0.000 claims abstract description 40
- 239000013543 active substance Substances 0.000 claims abstract description 37
- 238000010438 heat treatment Methods 0.000 claims abstract description 29
- 238000000034 method Methods 0.000 claims abstract description 25
- 239000002253 acid Substances 0.000 claims abstract description 15
- 238000001816 cooling Methods 0.000 claims abstract description 13
- 230000008569 process Effects 0.000 claims abstract description 11
- 239000002244 precipitate Substances 0.000 claims abstract description 10
- 239000006228 supernatant Substances 0.000 claims abstract description 10
- 238000001035 drying Methods 0.000 claims abstract description 5
- 238000001704 evaporation Methods 0.000 claims abstract description 5
- 238000001914 filtration Methods 0.000 claims abstract description 5
- 238000000227 grinding Methods 0.000 claims abstract description 5
- 238000002156 mixing Methods 0.000 claims abstract description 5
- 238000002791 soaking Methods 0.000 claims abstract description 5
- 238000005406 washing Methods 0.000 claims abstract description 5
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims description 21
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 18
- 239000012190 activator Substances 0.000 claims description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 16
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium persulfate Chemical compound [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 claims description 14
- 230000010355 oscillation Effects 0.000 claims description 14
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 claims description 12
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 claims description 12
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 12
- 239000004202 carbamide Substances 0.000 claims description 12
- CDBYLPFSWZWCQE-UHFFFAOYSA-L sodium carbonate Substances [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 12
- 239000004408 titanium dioxide Substances 0.000 claims description 9
- 239000010881 fly ash Substances 0.000 claims description 8
- 239000012286 potassium permanganate Substances 0.000 claims description 8
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 claims description 7
- 239000005751 Copper oxide Substances 0.000 claims description 7
- DPXJVFZANSGRMM-UHFFFAOYSA-N acetic acid;2,3,4,5,6-pentahydroxyhexanal;sodium Chemical compound [Na].CC(O)=O.OCC(O)C(O)C(O)C(O)C=O DPXJVFZANSGRMM-UHFFFAOYSA-N 0.000 claims description 7
- 229910001870 ammonium persulfate Inorganic materials 0.000 claims description 7
- 239000001768 carboxy methyl cellulose Substances 0.000 claims description 7
- 229910000431 copper oxide Inorganic materials 0.000 claims description 7
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 claims description 7
- 239000002245 particle Substances 0.000 claims description 7
- 235000019812 sodium carboxymethyl cellulose Nutrition 0.000 claims description 7
- 229920001027 sodium carboxymethylcellulose Polymers 0.000 claims description 7
- 229910001928 zirconium oxide Inorganic materials 0.000 claims description 7
- 239000004952 Polyamide Substances 0.000 claims description 6
- 239000002202 Polyethylene glycol Substances 0.000 claims description 6
- 235000019270 ammonium chloride Nutrition 0.000 claims description 6
- VBIXEXWLHSRNKB-UHFFFAOYSA-N ammonium oxalate Chemical compound [NH4+].[NH4+].[O-]C(=O)C([O-])=O VBIXEXWLHSRNKB-UHFFFAOYSA-N 0.000 claims description 6
- 229910000402 monopotassium phosphate Inorganic materials 0.000 claims description 6
- 235000019796 monopotassium phosphate Nutrition 0.000 claims description 6
- PJNZPQUBCPKICU-UHFFFAOYSA-N phosphoric acid;potassium Chemical compound [K].OP(O)(O)=O PJNZPQUBCPKICU-UHFFFAOYSA-N 0.000 claims description 6
- 229920002647 polyamide Polymers 0.000 claims description 6
- 229920000515 polycarbonate Polymers 0.000 claims description 6
- 239000004417 polycarbonate Substances 0.000 claims description 6
- 229920001223 polyethylene glycol Polymers 0.000 claims description 6
- 230000009919 sequestration Effects 0.000 claims description 6
- 229910000030 sodium bicarbonate Inorganic materials 0.000 claims description 6
- 235000017557 sodium bicarbonate Nutrition 0.000 claims description 6
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 6
- LCPVQAHEFVXVKT-UHFFFAOYSA-N 2-(2,4-difluorophenoxy)pyridin-3-amine Chemical compound NC1=CC=CN=C1OC1=CC=C(F)C=C1F LCPVQAHEFVXVKT-UHFFFAOYSA-N 0.000 claims description 5
- CHQMHPLRPQMAMX-UHFFFAOYSA-L sodium persulfate Substances [Na+].[Na+].[O-]S(=O)(=O)OOS([O-])(=O)=O CHQMHPLRPQMAMX-UHFFFAOYSA-L 0.000 claims description 5
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 4
- 239000004743 Polypropylene Substances 0.000 claims description 4
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 4
- 229920002239 polyacrylonitrile Polymers 0.000 claims description 4
- -1 polypropylene Polymers 0.000 claims description 4
- 229920001155 polypropylene Polymers 0.000 claims description 4
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 4
- 229920000083 poly(allylamine) Polymers 0.000 claims description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 10
- 239000003546 flue gas Substances 0.000 abstract description 10
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 42
- 230000000694 effects Effects 0.000 description 34
- 238000006243 chemical reaction Methods 0.000 description 18
- 230000008092 positive effect Effects 0.000 description 16
- 230000002411 adverse Effects 0.000 description 15
- 230000000052 comparative effect Effects 0.000 description 15
- 239000000243 solution Substances 0.000 description 14
- 239000000126 substance Substances 0.000 description 11
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 10
- 238000005516 engineering process Methods 0.000 description 10
- 239000000203 mixture Substances 0.000 description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
- 230000003213 activating effect Effects 0.000 description 6
- 239000001569 carbon dioxide Substances 0.000 description 5
- 229910002092 carbon dioxide Inorganic materials 0.000 description 5
- 229920002401 polyacrylamide Polymers 0.000 description 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 4
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 4
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 4
- 239000003054 catalyst Substances 0.000 description 4
- 239000010949 copper Substances 0.000 description 4
- 229910052802 copper Inorganic materials 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 229910052757 nitrogen Inorganic materials 0.000 description 4
- 238000009628 steelmaking Methods 0.000 description 4
- 239000002699 waste material Substances 0.000 description 4
- 229910052726 zirconium Inorganic materials 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- 239000003929 acidic solution Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 3
- 239000011575 calcium Substances 0.000 description 3
- 229910052791 calcium Inorganic materials 0.000 description 3
- 239000003344 environmental pollutant Substances 0.000 description 3
- 238000011156 evaluation Methods 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 239000011777 magnesium Substances 0.000 description 3
- 229910052749 magnesium Inorganic materials 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 description 3
- 231100000719 pollutant Toxicity 0.000 description 3
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 2
- UIIMBOGNXHQVGW-DEQYMQKBSA-M Sodium bicarbonate-14C Chemical compound [Na+].O[14C]([O-])=O UIIMBOGNXHQVGW-DEQYMQKBSA-M 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 235000011114 ammonium hydroxide Nutrition 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 238000010531 catalytic reduction reaction Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000006722 reduction reaction Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- WKBPZYKAUNRMKP-UHFFFAOYSA-N 1-[2-(2,4-dichlorophenyl)pentyl]1,2,4-triazole Chemical compound C=1C=C(Cl)C=C(Cl)C=1C(CCC)CN1C=NC=N1 WKBPZYKAUNRMKP-UHFFFAOYSA-N 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 239000000443 aerosol Substances 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000002274 desiccant Substances 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 231100000572 poisoning Toxicity 0.000 description 1
- 230000000607 poisoning effect Effects 0.000 description 1
- USHAGKDGDHPEEY-UHFFFAOYSA-L potassium persulfate Chemical group [K+].[K+].[O-]S(=O)(=O)OOS([O-])(=O)=O USHAGKDGDHPEEY-UHFFFAOYSA-L 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- WJCNZQLZVWNLKY-UHFFFAOYSA-N thiabendazole Chemical compound S1C=NC(C=2NC3=CC=CC=C3N=2)=C1 WJCNZQLZVWNLKY-UHFFFAOYSA-N 0.000 description 1
Images
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
- B01D53/54—Nitrogen compounds
- B01D53/56—Nitrogen oxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/30—Accessories for evaporators ; Constructional details thereof
-
- 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
- B01D53/62—Carbon oxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/20—Reductants
- B01D2251/206—Ammonium compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/20—Reductants
- B01D2251/206—Ammonium compounds
- B01D2251/2067—Urea
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/60—Inorganic bases or salts
- B01D2251/602—Oxides
-
- 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
- B01D2251/00—Reactants
- B01D2251/80—Organic bases or salts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Environmental & Geological Engineering (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Treating Waste Gases (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The application relates to the field of flue gas treatment, in particular to a denitration carbon-fixing agent taking steel slag as a raw material and a preparation method and application thereof; the denitration carbon fixation agent comprises: the steel slag stabilizer comprises a reducing agent, an active agent, a complexing agent, a combustion improver, an initiator and a stabilizer, wherein the stabilizer is a steel slag extract; the method comprises the following steps: respectively obtaining steel slag, a reducing agent, a complexing agent, an initiator and a combustion improver; crushing the steel slag, soaking the crushed steel slag in an acid solution for first heating, and then cooling and standing the steel slag to respectively obtain supernatant and lower-layer precipitates; evaporating and first roasting the supernatant to obtain a stabilizer; washing, filtering and drying the lower-layer precipitate, and then carrying out second roasting to obtain an active agent; mixing a stabilizer, an active agent, a reducing agent, a complexing agent, an initiator and a combustion improver, and then grinding to obtain a dry high-efficiency denitration carbon fixing agent; the application comprises the step of applying the denitration carbon fixing agent to an SNCR denitration process.
Description
Technical Field
The application relates to the field of flue gas treatment, in particular to a denitration carbon-fixing agent taking steel slag as a raw material, and a preparation method and application thereof.
Background
With further improvement and enhancement of the relevant laws and regulations for preventing and controlling the atmospheric pollution in China, the emission limit standard of pollutants is lower and lower, the emission of industrial sources is the most main atmospheric pollution source, and the purification treatment of industrial flue gas faces huge challenges aiming at the requirement of ultralow emission of pollutants such as nitrogen oxides and the like.
The current commonly used flue gas denitration technology is divided into two types, one type is selective catalytic reduction technology (SCR), the other type is selective non-catalytic reduction technology (SNCR), the two maximum differences are whether to use a catalyst, the SCR technology can be widely applied due to the existence of the catalyst to reach higher denitration efficiency (more than 90%) at lower flue gas temperature, but the SCR technology has the defects of higher one-time investment, additional reactor construction and easy poisoning and abrasion of the catalyst; the SNCR technology directly sprays a denitrifier into a hearth, reduces nitrogen oxide (NOx) into nitrogen and water at high temperature, does not need to additionally establish a reactor like SCR, has low investment, but has low denitration efficiency which is only 30-50 percent and does not accord with the current emission standard, and at the same time, most of the SNCR technologies usually adopt ammonia water or urea aqueous solution as the denitrifier, can reduce the temperature in the furnace after being sprayed into the hearth, and is not beneficial to the denitration reaction in the SNCR.
Meanwhile, a steel plant can produce a large amount of steel slag in the smelting process, the large amount of steel slag is often treated as waste, and the existing steel slag has a small recycling range and is often used for producing building materials, so that the steel plant has small profit; therefore, how to apply the steel slag in the flue gas denitration technology is a technical problem which needs to be solved urgently at present.
Disclosure of Invention
The application provides a denitration carbon-fixing agent taking steel slag as a raw material, and a preparation method and application thereof, which aim to solve the technical problem that the steel slag in the prior art is difficult to apply in a flue gas denitration technology.
In a first aspect, the present application provides a denitration carbon fixation agent using steel slag as a raw material, and the denitration carbon fixation agent comprises, by weight: reducing agent: 90-150 parts of an active agent: 1.2-3.3 parts of complexing agent: 1.0-3.0 parts of combustion improver: 0.5-2.0 parts of initiator: 4-6 parts of stabilizer: 20-40 parts of a stabilizer, wherein the stabilizer is a steel slag extract.
Optionally, the active agent includes at least one of active iron oxide, potassium permanganate, copper oxide, titanium dioxide, and zirconium oxide.
Optionally, the reducing agent comprises at least one of urea, ammonium oxalate, ammonium chloride, polyallylamine, polyamide, sodium bicarbonate and sodium carbonate.
Optionally, the complexing agent includes at least one of sodium carboxymethylcellulose, polyvinyl alcohol, polyethylene glycol, polypropylene alcohol, polyacrylonitrile, and polycarbonate.
Optionally, the initiator comprises at least one of ammonium persulfate, sodium persulfate, and potassium dihydrogen phosphate.
Optionally, the combustion improver comprises activated carbon powder and/or fly ash.
In a second aspect, the present application provides a preparation method of a denitration carbon-fixing agent using steel slag as a raw material, the method comprising:
respectively obtaining steel slag, a reducing agent, a complexing agent, an initiator and a combustion improver;
crushing the steel slag, soaking the crushed steel slag in an acid solution for first heating, and then cooling and standing to respectively obtain a supernatant and a lower precipitate;
evaporating and first roasting the supernatant to obtain a stabilizer;
washing, filtering and drying the lower-layer precipitate, and then carrying out second roasting to obtain an active agent;
and mixing the stabilizer, the activator, the reducing agent, the complexing agent, the initiator and the combustion improver, and then grinding to obtain the dry efficient denitration carbon fixing agent.
Optionally, the first roasting temperature is 600-900 ℃, and the first roasting time is 2-8 h;
the temperature of the second roasting is 400-700 ℃, and the time of the second roasting is 3-7 h.
Optionally, the first heating comprises: under the condition of ultrasonic oscillation, carrying out first heating in a water bath heating mode, wherein the ultrasonic oscillation time is 6-12 h, and the water bath heating temperature is 40-100 ℃;
the particle size of the crushed steel slag is less than or equal to 200 meshes;
the cooling comprises the following steps: naturally cooling to room temperature;
the standing time is 6-24 h.
In a third aspect, the application provides an application of the denitration carbon-fixing agent using steel slag as a raw material, and the application comprises the step of using the denitration carbon-fixing agent in the SNCR denitration process.
Compared with the prior art, the technical scheme provided by the embodiment of the application has the following advantages:
according to the denitration carbon fixing agent taking the steel slag as the raw material, the steel slag extract is used as the stabilizer, and then the reducing agent, the activating agent, the complexing agent, the combustion improver and the initiator are sequentially matched, so that the stable denitration carbon fixing agent is formed, the waste steel slag and the SNCR technology are combined together, and a new thought and a formula are provided for preparing the SNCR denitration agent.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.
Fig. 1 is a schematic flow chart of a method provided in an embodiment of the present application;
FIG. 2 is a diagram illustrating the activity evaluation of a denitration carbon sequestration agent provided by an embodiment of the present application;
fig. 3 is an appearance diagram of the denitration carbon sequestration agent provided by the embodiment of the application.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making creative efforts shall fall within the protection scope of the present application.
The inventive idea of the application is as follows: because the waste steel slag contains oxides of iron, manganese, calcium, magnesium and the like, particularly the converter steel slag contains 40 to 50 percent of CaO and 6 to 10 percent of MgO, the CaO not only can be used as a drying agent to prevent the denitration agent from deliquescing, but also can react with CO within an SNCR reaction temperature window (800 to 1000 ℃) to form a denitration catalyst 2 Reaction to form CaCO 3 Thereby realizing partial CO while denitrating 2 Trapping to achieve the purpose of treating pollution by waste and controlling NOx and CO 2 The purpose of "double subtraction".
In one embodiment of the present invention, a denitration carbon fixation agent using steel slag as a raw material is provided, which includes, by weight: reducing agent: 90-150 parts of an active agent: 1.2-3.3 parts of complexing agent: 1.0-3.0 parts of combustion improver: 0.5-2.0 parts of initiator: 4-6 parts of stabilizer: 20-40 parts of a stabilizer, wherein the stabilizer is a steel slag extract.
In the application, the positive effects that the reducing agent accounts for 90-150 parts by weight are that nitrogen oxides in the steelmaking stage can be reduced into nitrogen and water in the weight fraction range, and meanwhile, a stabilizer and an activator can be matched to realize denitration and carbon fixation; when the value of the weight part is larger than the maximum value of the end point of the range, the adverse effect is that the content of the reducing agent is too much, the denitration agent is easy to absorb moisture and harden, so that the power consumption of a fan is increased, even pipelines are blocked when the power consumption is serious, and the excessive reducing agent not only increases the preparation cost, but also easily causes the escape of ammonia; when the value of the weight part is less than the endpoint minimum value in the range, the adverse effect is that the content of the reducing agent is too low, the denitration efficiency of the denitration agent is reduced, and the operation cost is increased.
The positive effect of the activator with the weight portion of 1.2-3.3 portions is that the denitration carbon fixing agent can be fully activated within the weight portion range, so that nitrogen oxide in the steelmaking stage is reduced into nitrogen and water, and simultaneously, the denitration carbon fixing agent can be matched with the stabilizer to realize denitration carbon fixing; when the value of the weight part is larger than the maximum value of the end point of the range, the adverse effect is that the content of the active agent is too much, the reducing agent is decomposed too fast, the reducing gas cannot be in full contact with NOx, the denitration efficiency is reduced, meanwhile, the active agent has certain hygroscopicity, and the injection resistance of the denitration agent is increased due to the excessive active agent; when the value of weight portion is less than the endpoint minimum value in this range, the adverse effect that will lead to is that the active agent content is too low, will cause the denitrifier to decompose inadequately to influence denitration efficiency, thereby perhaps need to improve furnace temperature in order to accelerate the decomposition of denitrifier, but furnace temperature's promotion can make a small amount of ammonia turn into NOx, thereby reduces denitration efficiency.
The positive effect of the complexing agent with the weight portion of 1.0-3.0 portions is that the denitration carbon fixation agent can be fixed together in the weight portion range, thereby promoting the denitration carbon fixation and reducing the nitrogen oxide in the steelmaking stage into nitrogen and water by the denitration carbon fixation agent; when the value of the weight part is larger than the maximum value of the end point of the range, the adverse effect is that the content of the complexing agent is too much, and the denitration agent is easy to agglomerate and appear at high temperature, so that the dispersion degree of the denitration agent during injection is reduced, the denitration efficiency is influenced, and a pipeline can be blocked when the denitration efficiency is serious; when the value of the weight part is less than the endpoint minimum value in the range, the adverse effect is that the content of the complexing agent is too low, so that the components of the denitrifier cannot be effectively complexed together, thereby affecting the denitration efficiency.
The positive effect of the combustion improver of 0.5 to 2.0 parts by weight is that the combustion improver can burn in the range of the parts by weight, thereby maintaining the temperature of the denitration fixed stage and leading the denitration carbon fixing agent to be capable of reacting stably; when the value of the weight part is larger than the maximum value of the end point of the range, the adverse effect is that excessive combustion improver cannot ensure that the denitration carbon fixing agent is carried out at a proper reaction temperature, so that the denitration carbon fixing agent cannot be fully denitrated, and when the value of the weight part is smaller than the minimum value of the end point of the range, the adverse effect is that too little combustion improver cannot ensure that the denitration carbon fixing agent can reach an effective denitration temperature, and the reducing agent cannot effectively work.
The positive effect of the initiator of 4-6 parts by weight is that the initiator can fully promote denitration solid carbon to carry out reaction in the range of the parts by weight, thereby ensuring the full proceeding of denitration; when the value of the weight portion is larger than the maximum value of the end point of the range, the adverse effect is that the denitration agent is easy to decompose due to excessive initiator, so that the denitration efficiency is unstable, and the stable storage of the denitration agent is not facilitated; when the value of the weight part is less than the minimum value of the endpoint in the range, the content of the initiator is too low, and the denitration carbon fixing agent cannot be successfully denitrated.
The stabilizer has the advantages that the stabilizer can stabilize the denitration carbon fixing agent for denitration and can stabilize the components in the range of 20-40 parts by weight; when the value of the weight part is larger than the maximum value of the end point of the range, the adverse effect is caused that the existence of excessive stabilizer can reduce the denitration efficiency and aggravate the scaling of the hearth; when the value of the weight part is less than the minimum value of the endpoint in the range, the adverse effect is that the content of the stabilizer is too low, so that the components in the denitration carbon fixing agent cannot be stabilized, and the denitration carbon fixing agent cannot be denitrated smoothly.
In some embodiments, the active agent comprises at least one of active iron oxide, potassium permanganate, copper oxide, titanium dioxide, and zirconium oxide, and the active agent comprises an extract of steel slag.
In the application, the active agent comprises at least one of active iron oxide, potassium permanganate, copper oxide, titanium dioxide and zirconium oxide, and the positive effect is that the active agent is limited, so that the active agent can promote the denitration carbon-fixing agent to carry out denitration reaction, and meanwhile, as the active agent is common steel slag impurities, corresponding active agent substances can be extracted from the steel slag.
In some embodiments, the reducing agent comprises at least one of urea, ammonium oxalate, ammonium chloride, polyacrylamide, polyamide, sodium bicarbonate, and sodium carbonate.
In the application, the positive effect that the reducing agent comprises at least one of urea, ammonium oxalate, ammonium chloride, polyacrylamide, sodium bicarbonate and sodium carbonate is that the cost of the integral denitration carbon fixing agent is reduced by selecting the conventional reducing agent.
In some embodiments, the complexing agent comprises at least one of sodium carboxymethylcellulose, polyvinyl alcohol, polyethylene glycol, polyacrylonitrile, and polycarbonate.
In the application, the complexing agent comprises at least one of sodium carboxymethylcellulose, polyvinyl alcohol, polyethylene glycol, polyacrylonitrile and polycarbonate, and the positive effect is that the complexing agent is limited to be a common water-soluble complexing agent, so that the overall cost of the denitration carbon fixing agent can be fully reduced.
In some embodiments, the initiator comprises at least one of ammonium persulfate, sodium persulfate, and potassium dihydrogen phosphate.
In the application, the positive effect that the initiator comprises at least one of ammonium persulfate, sodium persulfate and potassium dihydrogen phosphate is that the overall cost of the denitration carbon fixing agent can be reduced by limiting the source of the initiator.
In some embodiments, the combustion improver comprises activated carbon powder and/or fly ash.
In the application, the combustion improver comprises the activated carbon powder and/or the fly ash, and the positive effects are that the overall cost of the denitration carbon fixing agent can be further reduced by limiting the conventional combustion improver, and the reaction temperature and the carbon content of the denitration carbon fixing agent can be further ensured.
In an embodiment of the present application, as shown in fig. 1, a method for preparing a denitration carbon-fixing agent using steel slag as a raw material is provided, the method including:
s1, respectively obtaining steel slag, a reducing agent, a complexing agent, an initiator and a combustion improver;
s2, crushing the steel slag, soaking the crushed steel slag in an acid solution for first heating, cooling and standing to obtain a supernatant and a lower precipitate respectively;
s3, evaporating and roasting the supernatant liquor to obtain a stabilizer;
s4, washing, filtering and drying the lower-layer precipitate, and then carrying out second roasting to obtain an active agent;
and S5, mixing the stabilizer, the activator, the reducer, the complexing agent, the initiator and the combustion improver, and then grinding to obtain the dry efficient denitration carbon fixing agent, wherein the acidic solution can be acetic acid.
In some embodiments, the temperature of the first roasting is 600 ℃ to 900 ℃, and the time of the first roasting is 2h to 8h;
the temperature of the second roasting is 400-700 ℃, and the time of the second roasting is 3-7 h.
In the application, the positive effect that the first roasting temperature is 600-900 ℃ is that in the temperature range, the proper roasting temperature can fully sinter elements leached by acid solution in the steel slag and form a stable steel slag extract, so that a proper amount of CaO and MgO can be provided, nitrogen oxides and carbon dioxide in the denitration reaction are stabilized, and the stable reaction of the denitration carbon fixing agent is realized; when the value of the temperature is larger than the maximum value of the endpoint of the range, the adverse effect is that the excessive temperature can cause Ca and Mg in the steel slag to be converted into other substances, and the stable proceeding of the denitration reaction of the denitration carbon fixing agent is influenced.
The positive effect that the first roasting time is 2-8 h is that in the time range, elements leached out by acid solution in the steel slag can be fully sintered and form a stable steel slag extract, so that a proper amount of CaO and MgO can be provided, nitrogen oxides and carbon dioxide in the denitration reaction are stabilized, and the stable reaction of the denitration carbon fixing agent is realized; when the value of the time is larger than the maximum value of the end point of the range, the adverse effect is that the too long roasting time not only increases the process time consumption, but also causes the excessive oxidation of oxides such as iron, manganese, calcium, magnesium and the like in the steel slag to influence the performance of the stabilizer, thereby influencing the performance of the obtained denitration carbon fixing agent.
The positive effect of the second roasting temperature of 400-700 ℃ is that in the temperature range, iron element, manganese element, copper element, carbon element or zirconium element in the residual impurities which cannot be leached by the acid solution can be fully sintered into corresponding substances of active iron oxide, potassium permanganate, copper oxide, titanium dioxide or zirconium oxide, so that a stable activating agent is formed, the denitration carbon fixing agent can be fully activated, and the denitration reaction is promoted to be carried out; when the value of the temperature is greater than the maximum value of the end point of the range, the adverse effect is that the too high temperature causes the roasting oxidation of the iron element, the manganese element, the copper element, the carbon element or the zirconium element to be excessive, so that the effect of the activator is affected, and the denitration effect of the denitration carbon fixing agent is reduced.
The second roasting time is 3-7 h, and the positive effect is that in the time range, iron element, manganese element, copper element, carbon element or zirconium element in the residual impurities which cannot be leached by the acid solution can be fully sintered into corresponding substances of active iron oxide, potassium permanganate, copper oxide, titanium dioxide or zirconium oxide, so that a stable activating agent is formed, the denitration carbon fixing agent can be fully activated, and the denitration reaction is promoted to be carried out; when the value of the time is larger than the maximum value of the end point of the range, the time consumption of the process is increased due to overlong time, and meanwhile, the roasting oxidation of the iron element, the manganese element, the copper element, the carbon element or the zirconium element is excessive due to overlong time, so that the effect of the activator is influenced, and the denitration effect of the denitration carbon fixing agent is reduced.
In some embodiments, the first heating comprises: under the condition of ultrasonic oscillation, carrying out first heating in a water bath heating mode, wherein the ultrasonic oscillation time is 6-12 h, and the water bath heating temperature is 40-100 ℃;
the particle size of the crushed steel slag is less than or equal to 200 meshes;
the cooling comprises the following steps: naturally cooling to room temperature;
the standing time is 6-24 h.
In the application, the positive effect that the ultrasonic oscillation time is 6-12 h is that substances which are soluble in an acid solution in the steel slag can be fully dissolved in the solution within the time range, so that the mutual influence between the prepared stabilizing agent and an activating agent is avoided, the function of the denitration carbon-fixing agent is limited, and meanwhile, substances which are soluble in acid and substances which are difficult to dissolve in acid can be fully separated out within a proper time; when the time value is greater than the maximum value of the end point of the range, the time consumption of the process is increased due to too long time, and when the time value is less than the minimum value of the end point of the range, the time is too short, substances which are soluble in an acidic solution and substances which are difficult to dissolve in the acidic solution in the steel slag cannot be sufficiently dissolved and separated, so that the functions of a subsequent activating agent and a stabilizing agent are interfered with each other, and the denitration and carbon fixation effects of the denitration carbon fixation agent are influenced.
The crushed steel slag has the positive effect that the grain size is less than or equal to 200 meshes, and in the grain size range, the steel slag can be fully leached out of substances which can be dissolved in acid through the first heating of an acid solution, and can be beneficial to the second roasting to form an activating agent; when the particle size is greater than the end maximum of this range, this can have the adverse effect that too large a particle size will result in insufficient leaching of the acid soluble species, while the second calcination will not form a suitable activator.
In one embodiment of the application, the application of the denitration carbon-fixing agent using the steel slag as the raw material comprises the step of using the denitration carbon-fixing agent in an SNCR denitration process.
Example 1
A denitration carbon fixing agent using steel slag as a raw material comprises the following components in parts by weight: reducing agent: 90 parts, active agent: 2 parts, complexing agent: 1.0 part, combustion improver: 0.6 part, initiator: 4 parts and a stabilizer: 20 parts of the stabilizing agent is steel slag extract, and the stabilizing agent contains a large amount of CaO and can be directly replaced by CaO.
The activator comprises active ferric oxide and potassium permanganate which are mixed according to the mass ratio of 1: 1.
The reducing agent is ammonium chloride.
The complexing agent is sodium carboxymethyl cellulose.
The initiator is ammonium persulfate.
The combustion improver is fly ash.
As shown in fig. 1, a preparation method of a denitration carbon-fixing agent using steel slag as a raw material comprises the following steps:
s1, respectively obtaining steel slag, a reducing agent, a complexing agent, an initiator and a combustion improver;
s2, crushing the steel slag, soaking the crushed steel slag in an acid solution for first heating, cooling and standing to obtain a supernatant and a lower precipitate respectively;
s3, evaporating and roasting the supernatant liquor to obtain a stabilizer;
s4, washing, filtering and drying the lower-layer precipitate, and then carrying out second roasting to obtain an active agent;
and S5, mixing the stabilizer, the activator, the reducer, the complexing agent, the initiator and the combustion improver, and then grinding to obtain the dry efficient denitration carbon fixing agent.
The temperature of the first roasting is 600 ℃, and the time of the first roasting is 4 hours;
the temperature of the second roasting is 550 ℃, and the time of the second roasting is 6h.
The first heating includes: under the condition of ultrasonic oscillation, carrying out first heating in a water bath heating mode, wherein the time of ultrasonic oscillation is 6h, and the temperature of water bath heating is 60 ℃;
the grain size of the crushed steel slag is less than or equal to 200 meshes;
the cooling comprises the following steps: naturally cooling to room temperature;
the standing time is 12h.
Example 2
Comparing example 2 with example 1, example 2 differs from example 1 in that:
a denitration carbon fixing agent taking steel slag as a raw material comprises the following components in parts by weight: reducing agent: 100 parts, active agent: 2 parts, complexing agent: 1.2 parts of a combustion improver: 1 part, initiator: 6 parts and a stabilizer: 35 parts of a stabilizer, wherein the stabilizer is a steel slag extract.
The active agent is active ferric oxide.
The reducing agent is urea, sodium bicarbonate and sodium carbonate with the mass ratio of 3: 1.
The complexing agent is polyethylene glycol.
The initiator is potassium dihydrogen phosphate.
The combustion improver is activated carbon powder.
Example 3
Comparing example 3 with example 1, example 3 differs from example 1 in that:
a denitration carbon fixing agent taking steel slag as a raw material comprises the following components in parts by weight: reducing agent: 140 parts, active agent: 2.0 parts, complexing agent: 2 parts of a combustion improver: 2.0 parts, initiator: 5 parts and a stabilizer: 30 parts of a stabilizer, wherein the stabilizer is a steel slag extract.
The activator is a mixture of active iron oxide and copper oxide with the mass ratio of 3: 1.
The reducing agent is a mixture of urea, ammonium oxalate, sodium bicarbonate and sodium carbonate with the mass ratio of 24: 2: 1.
The complexing agent is polypropylene alcohol.
The initiator is sodium persulfate.
The combustion improver is a mixture of activated carbon powder and fly ash with the mass ratio of 1: 1.
Example 4
Comparing example 4 with example 1, example 4 differs from example 1 in that:
a denitration carbon fixing agent taking steel slag as a raw material comprises the following components in parts by weight: reducing agent: 110 parts, active agent: 2 parts of complexing agent: 2.6 parts of a combustion improver: 1.0 part, initiator: 4 parts and a stabilizer: 25 parts of a stabilizer, wherein the stabilizer is a steel slag extract.
The active agents are active ferric oxide and titanium dioxide with the mass ratio of 1: 1.
The reducing agent is a mixture of urea, polyacrylamide and sodium bicarbonate with the mass ratio of 20: 1.
The complexing agent is polycarbonate.
The initiator is potassium persulfate.
The combustion improver is activated carbon powder.
Example 5
Comparing example 5 with example 1, example 5 differs from example 1 in that:
a denitration carbon fixing agent taking steel slag as a raw material comprises the following components in parts by weight: reducing agent: 150 parts, active agent: 3 parts of complexing agent: 2 parts of a combustion improver: 1 part, initiator: 4 parts and a stabilizer: 40 parts of a stabilizer, wherein the stabilizer is a steel slag extract.
The active agent is a mixture of active iron oxide, titanium dioxide and zirconium oxide with the mass ratio of 3: 2: 1.
The reducing agent is a mixture of urea, polyacrylamide and polyamide in a mass ratio of 28: 1.
The complexing agent is sodium carboxymethyl cellulose.
The initiator is ammonium persulfate.
The combustion improver is activated carbon powder and fly ash with the ratio of 2: 1.
Example 6
Comparing example 6 with example 1, example 6 differs from example 1 in that:
a denitration carbon fixing agent taking steel slag as a raw material comprises the following components in parts by weight: reducing agent: 130 parts, active agent: 1.2 parts, complexing agent: 3 parts of a combustion improver: 0.5 part, initiator: 4 parts and a stabilizer: 40 parts of a stabilizer, wherein the stabilizer is a steel slag extract.
The active agent is a mixture of active iron oxide and titanium dioxide with the mass ratio of 1: 1.
The reducing agent is a mixture of urea, ammonium chloride and polyamide in a mass ratio of 23: 6: 1.
The complexing agent is sodium carboxymethylcellulose and polyethylene glycol in a ratio of 1: 1.
The initiator is potassium dihydrogen phosphate.
The combustion improver is activated carbon powder and fly ash with the ratio of 1: 2.
Example 7
Comparing example 7 with example 1, example 7 differs from example 1 in that:
a denitration carbon fixing agent taking steel slag as a raw material comprises the following components in parts by weight: reducing agent: 140 parts, active agent: 3.3 parts, complexing agent: 3 parts of a combustion improver: 0.5 part, initiator: 4 parts and a stabilizer: 40 parts of a stabilizer, wherein the stabilizer is a steel slag extract.
The active agent is potassium permanganate.
The reducing agent is a mixture of urea, ammonium oxalate, sodium bicarbonate, polyacrylamide and polyamide in a mass ratio of 20: 4: 1.
The complexing agent is 1: 1 polypropylene alcohol and polycarbonate.
The initiator is ammonium persulfate.
The combustion improver is activated carbon powder.
Example 8
Comparing example 8 with example 1, example 6 differs from example 1 in that:
the temperature of the first roasting is 650 ℃, and the time of the first roasting is 2 hours;
the temperature of the second roasting is 400 ℃, and the time of the second roasting is 3h.
The ultrasonic oscillation time is 7h, and the water bath heating temperature is 40 ℃;
the standing time is 6h.
Example 9
Comparing example 9 with example 1, example 7 differs from example 1 in that:
the temperature of the first roasting is 900 ℃, and the time of the first roasting is 8 hours;
the temperature of the second roasting is 700 ℃, and the time of the second roasting is 7h.
The first heating includes: under the condition of ultrasonic oscillation, carrying out first heating in a water bath heating mode, wherein the ultrasonic oscillation time is 12h, and the water bath heating temperature is 100 ℃;
the standing time is 24h.
Comparative example 1
Comparative example 1 and example 1 were compared, and comparative example 1 and example 1 were distinguished in that:
no stabilizer was added.
Comparative example 2
Comparative example 2 is compared with example 1, and comparative example 2 differs from example 1 in that:
no activator was added.
Comparative example 3
Comparative example 3 is compared with example 1, and comparative example 3 differs from example 1 in that:
the temperature of the first roasting is 550 ℃, and the time of the first roasting is 1h;
the temperature of the second roasting is 350 ℃, and the time of the second roasting is 2h.
The ultrasonic oscillation time is 5h, and the water bath heating temperature is 35 ℃.
Comparative example 4
Comparative example 4 is compared with example 1, and comparative example 4 differs from example 1 in that:
the temperature of the first roasting is 1000 ℃, and the time of the first roasting is 10 hours;
the temperature of the second roasting is 800 ℃, and the time of the second roasting is 8h.
The ultrasonic oscillation time is 14h, and the oil bath heating temperature is 110 ℃.
Related experiments:
the denitration carbon fixation agents obtained in examples 1 to 7 and comparative examples 1 to 4 were collected, and performance tests were performed on each denitration carbon fixation agent, and the results are shown in table 1.
Test methods of the related experiments:
denitration rate: and (3) carrying out activity evaluation on the high-efficiency denitration carbon-fixing agent by adopting a self-made reactor, wherein the concentration of nitrogen oxide is controlled to be 450ppm, carrying out quantitative injection on the high-efficiency denitration carbon-fixing agent by using a German Topas SAG-420 type dust aerosol generator, detecting the concentration of NOx at the inlet and the outlet of the reactor by using a German testo 350 flue gas analyzer, and calculating the denitration rate.
Carbon fixation rate: and testing by adopting a testing method and equipment with the same denitration rate.
TABLE 1 denitration and carbon fixation Activity of examples and comparative examples
Table 1 specific analysis:
the denitration rate refers to the efficiency of the denitration carbon-fixing agent in actual use, wherein the denitration rate indicates that the denitration carbon-fixing agent has higher and more stable activity when being higher.
The carbon fixation rate refers to the efficiency of the denitration carbon fixation agent in the use of the reagent, which can absorb carbon dioxide, and the higher the carbon fixation rate is, the better the removal effect of the denitration carbon fixation agent on carbon dioxide is.
From the data for examples 1-7 it can be seen that:
the denitration efficiency of the denitration carbon fixing agent provided by the invention mainly depends on the weight of the reducing agent, but the denitration efficiency is slowly increased after the weight of the reducing agent reaches a certain fraction, which indicates that the optimum range of the weight of the reducing agent exists.
The selection of the activator has obvious influence on the denitration activity, and the proper activator can enhance the denitration activity under the condition of the same weight part of the reducing agent.
Although the complexing agent, the combustion improver and the initiator have little influence on the value of the denitration efficiency, the complexing agent, the combustion improver and the initiator have obvious influence on the dispersibility and the shape maintenance of the denitration agent in use.
The carbon fixation rate is mainly influenced by the content of the stabilizer, the larger the specific gravity of the stabilizer in parts by weight is, the more the carbon fixation amount is, the influence of the reaction temperature is avoided, the integral carbon fixation rate is not good, but the carbon fixation rate still has certain beneficial values on the synergistic treatment of multiple pollutants and carbon emission reduction.
From the data of comparative examples 1-4, it can be seen that:
the stabilizer not only can influence the carbon fixation rate, but also has certain influence on the stability of the appearance of the denitration carbon fixation agent provided by the application.
The activator has a remarkable influence on the denitration efficiency, so that if the roasting temperature is low, the crystal form of the activator is influenced, the activity of the activator is reduced, and the denitration efficiency is influenced; if the roasting temperature is too high, agglomeration and increase of active agent particles are caused, and the denitration efficiency is also influenced. Therefore, the selection of the appropriate weight fraction of the stabilizer and the activator and the preparation method have a significant influence on the denitration rate and the carbon fixation amount of the denitration carbon fixation agent provided by the invention.
One or more technical solutions in the embodiments of the present application at least have the following technical effects or advantages:
(1) The denitration carbon fixing agent provided by the embodiment of the application obtains the extract by processing the steel slag, the extract of the steel slag is used as the stabilizing agent, and the formed denitration carbon fixing agent can effectively remove nitrogen oxides and fix carbon dioxide, so that a new thought is provided for the denitration agent.
(2) The denitration carbon fixing agent provided by the embodiment of the application has high denitration efficiency, can reach 84% at most, has stable performance, does not produce secondary pollution to the environment, can be widely applied to denitration of flue gas of a high-temperature industrial furnace, and can fix part of CO in the flue gas in a form of generating carbonate in an SNCR reaction temperature interval 2 And carbon emission reduction is realized while denitration is performed.
(3) The denitration carbon fixing agent provided by the embodiment of the application is stable in performance and convenient to transport because the denitration carbon fixing agent is solid powder, and can not reduce the temperature in the furnace like ammonia water and urea aqueous solution when being used, thereby reducing the operation and maintenance cost.
(4) According to the method provided by the embodiment of the application, due to the adoption of two-stage roasting treatment, substances in the steel slag can be fully extracted and respectively used as an active agent and a stabilizing agent, so that the use application of the steel slag is expanded, and the method can be used in the steel-making industry to realize the circular economy effect.
The drawings illustrate:
fig. 2 is an activity evaluation diagram of the denitration carbon sequestration agent provided in the embodiment of the present application, and as can be seen from fig. 2, the denitration activity tends to increase first and then decrease with the increase of the reaction temperature, and the denitration activity reaches the highest activity at 900 ℃, and the optimal reaction temperature region is 800 ℃ to 1000 ℃.
Fig. 3 is an appearance diagram of the denitration carbon fixing agent provided in the embodiment of the present application, and as can be seen from fig. 3, the denitration carbon fixing agent obtained in the present application is light yellow, and has uniform particle distribution, stable performance and convenient transportation.
It is noted that, in this document, relational terms such as "first" and "second," and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising a," "8230," "8230," or "comprising" does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.
The above description is merely illustrative of particular embodiments of the invention that enable those skilled in the art to understand or practice the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. The denitration carbon fixing agent taking steel slag as a raw material is characterized by comprising the following components in parts by weight: reducing agent: 90-150 parts of an active agent: 1.2-3.3 parts of complexing agent: 1.0-3.0 parts of combustion improver: 0.5-2.0 parts of initiator: 4-6 parts of stabilizer: 20-40 parts of a stabilizer, wherein the stabilizer is a steel slag extract, and the steel slag extract contains CaO and MgO;
the active agent comprises at least one of active iron oxide, potassium permanganate, copper oxide, titanium dioxide and zirconium oxide.
2. The denitration carbon sequestration agent of claim 1, wherein the reducing agent comprises at least one of urea, ammonium oxalate, ammonium chloride, polyallylamine, polyamide, sodium bicarbonate and sodium carbonate.
3. The denitration carbon sequestration agent according to claim 1, wherein the complexing agent comprises at least one of sodium carboxymethylcellulose, polyvinyl alcohol, polyethylene glycol, polypropylene alcohol, polyacrylonitrile and polycarbonate.
4. The denitration carbon-fixing agent of claim 1, wherein the initiator comprises at least one of ammonium persulfate, sodium persulfate and potassium dihydrogen phosphate.
5. The denitration carbon sequestration agent as claimed in claim 1, wherein the combustion improver comprises activated carbon powder and/or fly ash.
6. A method for preparing the denitration carbon fixing agent as set forth in any one of claims 1 to 5, wherein the method comprises:
respectively obtaining steel slag, a reducing agent, a complexing agent, an initiator and a combustion improver;
crushing the steel slag, soaking the crushed steel slag in an acid solution for first heating, and then cooling and standing the steel slag to respectively obtain supernatant and lower-layer precipitates;
evaporating and first roasting the supernatant to obtain a stabilizer;
washing, filtering and drying the lower-layer precipitate, and then carrying out second roasting to obtain an active agent;
mixing the stabilizer, the activator, the reducing agent, the complexing agent, the initiator and the combustion improver, and then grinding to obtain a dry high-efficiency denitration carbon fixing agent;
the first heating includes: under the condition of ultrasonic oscillation, carrying out first heating in a water bath heating mode, wherein the time of ultrasonic oscillation is 6-12 h, and the temperature of water bath heating is 40-100 ℃.
7. The method as claimed in claim 6, wherein the temperature of the first roasting is 600-900 ℃, and the time of the first roasting is 2-8 h;
the temperature of the second roasting is 400-700 ℃, and the time of the second roasting is 3-7 h.
8. The method of claim 6,
the particle size of the crushed steel slag is less than or equal to 200 meshes;
the cooling comprises the following steps: naturally cooling to room temperature;
the standing time is 6-24 h.
9. An application of the denitration carbon-fixing agent using steel slag as a raw material, which is characterized by comprising the step of using the denitration carbon-fixing agent as defined in any one of claims 1 to 5 in an SNCR denitration process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111472123.1A CN114367179B (en) | 2021-12-03 | 2021-12-03 | Denitration carbon fixing agent using steel slag as raw material and preparation method and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111472123.1A CN114367179B (en) | 2021-12-03 | 2021-12-03 | Denitration carbon fixing agent using steel slag as raw material and preparation method and application thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114367179A CN114367179A (en) | 2022-04-19 |
| CN114367179B true CN114367179B (en) | 2023-04-11 |
Family
ID=81139401
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111472123.1A Active CN114367179B (en) | 2021-12-03 | 2021-12-03 | Denitration carbon fixing agent using steel slag as raw material and preparation method and application thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114367179B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2108059A1 (en) * | 1970-02-20 | 1971-08-26 | North American Rockwell | Process for removing nitrogen oxides and other impurities from gas mixtures |
| FR3008326A1 (en) * | 2013-07-12 | 2015-01-16 | Lab Sa | PROCESS FOR MANUFACTURING A DENITRIFICATION CATALYST, AND CORRESPONDING DENITRIFICATION CATALYST, AND DENITRIFICATION METHOD USING SUCH A CATALYST |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0169997B1 (en) * | 1984-07-28 | 1991-09-18 | Kernforschungszentrum Karlsruhe Gmbh | Process for purifying smoke |
| US7378069B2 (en) * | 2004-07-27 | 2008-05-27 | Los Alamos National Security, Llc | Catalyst and method for reduction of nitrogen oxides |
| AU2007225296B2 (en) * | 2006-03-10 | 2011-12-22 | C-Quest Technologies International Llc | Carbon dioxide sequestration materials and processes |
| US20160177209A1 (en) * | 2009-09-24 | 2016-06-23 | Ash Improvement Technology Inc. | Addition of clay and slag to coal-fired combustors |
| CN101851071A (en) * | 2010-04-26 | 2010-10-06 | 首钢总公司 | Method for fixing carbon dioxide and digesting free calcium oxide in slag micro powder |
| CN103801192B (en) * | 2014-02-21 | 2015-11-11 | 陕西理工学院 | A kind of technique of cement kiln denitrating flue gas |
| CN106861431B (en) * | 2017-04-21 | 2018-02-27 | 广东龙鼎环境科技工程有限公司 | Quadruple effect denitrfying agent composition and its method of denitration |
| CN107694576A (en) * | 2017-09-30 | 2018-02-16 | 中晶蓝实业有限公司 | Dry desulfurization denitrfying agent and its production method and application |
| CN108246095B (en) * | 2017-12-19 | 2021-01-15 | 中冶宝钢技术服务有限公司 | Flue gas denitration agent and preparation method and application thereof |
| CN109777958A (en) * | 2019-01-02 | 2019-05-21 | 江西思远再生资源有限公司 | A kind of technique of the comprehensive reutilization valuable metal from material containing zinc |
-
2021
- 2021-12-03 CN CN202111472123.1A patent/CN114367179B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2108059A1 (en) * | 1970-02-20 | 1971-08-26 | North American Rockwell | Process for removing nitrogen oxides and other impurities from gas mixtures |
| FR3008326A1 (en) * | 2013-07-12 | 2015-01-16 | Lab Sa | PROCESS FOR MANUFACTURING A DENITRIFICATION CATALYST, AND CORRESPONDING DENITRIFICATION CATALYST, AND DENITRIFICATION METHOD USING SUCH A CATALYST |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114367179A (en) | 2022-04-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102936651B (en) | A kind of method sintering simultaneous SO_2 and NO removal system and desulphurization denitration thereof | |
| WO2019062455A1 (en) | Flue gas desulfurization and denitration agent, preparation method therefor and applications thereof | |
| CN106621773A (en) | Ammonia-carbon combined desulfurization and denitration method for sintering flue gas | |
| CN104324575A (en) | Spray absorption type system for simultaneous desulphurization and denitration of sintering flue gas | |
| CN102989301B (en) | Flue gas wet reduction integrated desulfurization, denitrification, harmless treatment and resource utilization method | |
| CN113769547A (en) | Granular composite denitration agent and preparation method thereof | |
| CN103028313B (en) | Integrated desulfuration and denitration method for wet oxidation of flue gas | |
| CN109126442A (en) | A kind of compound smoke denitrifier | |
| CN107008323A (en) | A kind of activated-carbon catalyst preparation method for flue gas desulfurization and denitrification | |
| CN114367179B (en) | Denitration carbon fixing agent using steel slag as raw material and preparation method and application thereof | |
| CN207856647U (en) | A kind of gaseous oxidation collaboration absorption flue gas multiple pollutant purifier | |
| CN112403184B (en) | Method for recovering various sulfur resources by using sintering flue gas | |
| CN212440707U (en) | Development of desulfurization, denitrification and dust removal integrated technology | |
| CN105233645A (en) | Energy saving and emission reduction comprehensive purifying treatment technology of coke oven flue gas | |
| CN110655251B (en) | Method for removing chloride ions in desulfurization slurry | |
| CN107261805A (en) | A kind of special hydrazine solution of chimney smoke desulphurization denitration and preparation method thereof | |
| CN115501748B (en) | Denitration agent and preparation method thereof | |
| CN113117484A (en) | Dry-method integrated flue gas desulfurization and denitrification process | |
| CN111054201A (en) | Development of desulfurization, denitrification and dust removal integrated technology | |
| CN106345246A (en) | Method for removing nitric oxide and application of method | |
| CN101161331A (en) | Method for processing low concentration unwanted waste gas using microwave-solid castoff | |
| JP2005508727A (en) | Method for treating ammonia-containing combustion exhaust gas | |
| CN104815707B (en) | One kind inactivation vanadium titanium-based Faveolate denitration catalyst low temperature modification regenerated liquid and preparation method thereof | |
| CN113617219A (en) | Flue gas denitration agent and preparation method thereof | |
| CN103566727B (en) | Method for desulfurization and denitrification of flue gas |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |