CN112999865B - Preparation method of purification device for three-effect removal of steel smoke - Google Patents
Preparation method of purification device for three-effect removal of steel smoke Download PDFInfo
- Publication number
- CN112999865B CN112999865B CN202110379667.7A CN202110379667A CN112999865B CN 112999865 B CN112999865 B CN 112999865B CN 202110379667 A CN202110379667 A CN 202110379667A CN 112999865 B CN112999865 B CN 112999865B
- Authority
- CN
- China
- Prior art keywords
- purification device
- flue gas
- steel
- effect removal
- preparation
- 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
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 108
- 239000010959 steel Substances 0.000 title claims abstract description 108
- 238000000746 purification Methods 0.000 title claims abstract description 49
- 238000002360 preparation method Methods 0.000 title claims abstract description 32
- 239000000779 smoke Substances 0.000 title claims abstract description 20
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 50
- 239000003546 flue gas Substances 0.000 claims abstract description 46
- 239000000725 suspension Substances 0.000 claims abstract description 46
- 239000002808 molecular sieve Substances 0.000 claims abstract description 38
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 claims abstract description 38
- VXAUWWUXCIMFIM-UHFFFAOYSA-M aluminum;oxygen(2-);hydroxide Chemical group [OH-].[O-2].[Al+3] VXAUWWUXCIMFIM-UHFFFAOYSA-M 0.000 claims abstract description 37
- 238000007598 dipping method Methods 0.000 claims abstract description 25
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims abstract description 23
- 229910017604 nitric acid Inorganic materials 0.000 claims abstract description 23
- 239000007787 solid Substances 0.000 claims abstract description 19
- 239000000126 substance Substances 0.000 claims abstract description 17
- 238000001035 drying Methods 0.000 claims abstract description 16
- 150000001879 copper Chemical class 0.000 claims abstract description 13
- 229910001994 rare earth metal nitrate Inorganic materials 0.000 claims abstract description 9
- 238000003837 high-temperature calcination Methods 0.000 claims abstract description 3
- 239000007788 liquid Substances 0.000 claims description 28
- 238000003756 stirring Methods 0.000 claims description 28
- 239000008367 deionised water Substances 0.000 claims description 22
- 229910021641 deionized water Inorganic materials 0.000 claims description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 22
- 239000000203 mixture Substances 0.000 claims description 19
- FYDKNKUEBJQCCN-UHFFFAOYSA-N lanthanum(3+);trinitrate Chemical compound [La+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O FYDKNKUEBJQCCN-UHFFFAOYSA-N 0.000 claims description 18
- 238000001354 calcination Methods 0.000 claims description 16
- XTVVROIMIGLXTD-UHFFFAOYSA-N copper(II) nitrate Chemical compound [Cu+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O XTVVROIMIGLXTD-UHFFFAOYSA-N 0.000 claims description 14
- 238000007664 blowing Methods 0.000 claims description 11
- 238000001816 cooling Methods 0.000 claims description 9
- HSJPMRKMPBAUAU-UHFFFAOYSA-N cerium(3+);trinitrate Chemical compound [Ce+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O HSJPMRKMPBAUAU-UHFFFAOYSA-N 0.000 claims description 8
- 229910000365 copper sulfate Inorganic materials 0.000 claims description 4
- ARUVKPQLZAKDPS-UHFFFAOYSA-L copper(II) sulfate Chemical compound [Cu+2].[O-][S+2]([O-])([O-])[O-] ARUVKPQLZAKDPS-UHFFFAOYSA-L 0.000 claims description 4
- ORTQZVOHEJQUHG-UHFFFAOYSA-L copper(II) chloride Chemical compound Cl[Cu]Cl ORTQZVOHEJQUHG-UHFFFAOYSA-L 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 22
- 239000003054 catalyst Substances 0.000 abstract description 13
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 abstract description 11
- 239000002994 raw material Substances 0.000 abstract description 4
- 238000011031 large-scale manufacturing process Methods 0.000 abstract description 3
- 238000006555 catalytic reaction Methods 0.000 abstract 1
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 52
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 18
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 15
- 230000003197 catalytic effect Effects 0.000 description 11
- 229910052761 rare earth metal Inorganic materials 0.000 description 11
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 10
- 239000003344 environmental pollutant Substances 0.000 description 9
- 231100000719 pollutant Toxicity 0.000 description 9
- 230000000694 effects Effects 0.000 description 8
- 150000002910 rare earth metals Chemical class 0.000 description 8
- 230000008569 process Effects 0.000 description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical group [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 6
- 229910052782 aluminium Inorganic materials 0.000 description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 6
- 239000000243 solution Substances 0.000 description 6
- 229910021529 ammonia Inorganic materials 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 229910002091 carbon monoxide Inorganic materials 0.000 description 4
- 229910052802 copper Inorganic materials 0.000 description 4
- 239000010949 copper Substances 0.000 description 4
- 230000009467 reduction Effects 0.000 description 4
- 238000006477 desulfuration reaction Methods 0.000 description 3
- 230000023556 desulfurization Effects 0.000 description 3
- -1 rare earth metal salt Chemical class 0.000 description 3
- 238000005245 sintering Methods 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000003915 air pollution Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- MRELNEQAGSRDBK-UHFFFAOYSA-N lanthanum(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[La+3].[La+3] MRELNEQAGSRDBK-UHFFFAOYSA-N 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 230000001172 regenerating effect Effects 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- ODUCDPQEXGNKDN-UHFFFAOYSA-N Nitrogen oxide(NO) Natural products O=N ODUCDPQEXGNKDN-UHFFFAOYSA-N 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000013543 active substance Substances 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000012752 auxiliary agent Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 238000007084 catalytic combustion reaction Methods 0.000 description 1
- 229910000420 cerium oxide Inorganic materials 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000003009 desulfurizing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910000510 noble metal Inorganic materials 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- BMMGVYCKOGBVEV-UHFFFAOYSA-N oxo(oxoceriooxy)cerium Chemical compound [Ce]=O.O=[Ce]=O BMMGVYCKOGBVEV-UHFFFAOYSA-N 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 239000002957 persistent organic pollutant Substances 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 238000012546 transfer Methods 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
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8643—Removing mixtures of carbon monoxide or hydrocarbons and nitrogen oxides
- B01D53/8646—Simultaneous elimination of the components
- B01D53/8653—Simultaneous elimination of the components characterised by a specific device
-
- 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
- B01D53/86—Catalytic processes
- B01D53/8678—Removing components of undefined structure
- B01D53/8687—Organic components
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J29/00—Catalysts comprising molecular sieves
- B01J29/04—Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites
- B01J29/06—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
- B01J29/70—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of types characterised by their specific structure not provided for in groups B01J29/08 - B01J29/65
- B01J29/72—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of types characterised by their specific structure not provided for in groups B01J29/08 - B01J29/65 containing iron group metals, noble metals or copper
- B01J29/76—Iron group metals or copper
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J29/00—Catalysts comprising molecular sieves
- B01J29/82—Phosphates
- B01J29/84—Aluminophosphates containing other elements, e.g. metals, boron
- B01J29/85—Silicoaluminophosphates [SAPO compounds]
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/02—Impregnation, coating or precipitation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
- B01D2257/708—Volatile organic compounds V.O.C.'s
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2229/00—Aspects of molecular sieve catalysts not covered by B01J29/00
- B01J2229/10—After treatment, characterised by the effect to be obtained
- B01J2229/18—After treatment, characterised by the effect to be obtained to introduce other elements into or onto the molecular sieve itself
- B01J2229/186—After treatment, characterised by the effect to be obtained to introduce other elements into or onto the molecular sieve itself not in framework positions
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Environmental & Geological Engineering (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Biomedical Technology (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- General Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Catalysts (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention discloses a preparation method of a purification device for three-effect removal of steel smoke, which comprises the following steps: the purification device is characterized in that a copper salt, a rare earth metal nitrate and pseudo-boehmite form sol under the catalysis of nitric acid, a molecular sieve is added into the sol to form suspension, a steel wire mesh is immersed into the suspension, the load capacity of solid matters on the steel wire mesh is controlled to be 20% after multiple dipping and drying, and then the purification device capable of realizing the three-effect removal of steel smoke is obtained by high-temperature calcination. Compared with other methods for realizing the near zero emission of the steel flue gas, the purification device for the three-effect removal of the steel flue gas, which is prepared by the method, is directly arranged at the rear end of the denitration catalyst module, so that the near zero emission of the steel flue gas can be realized, the raw materials for preparing the purification device are simple and easy to obtain, the cost is low, the preparation method is simple, the large-scale production is easy, substances such as ozone and the like are not additionally added in the flue gas, and the possibility of secondary pollution is reduced.
Description
Technical Field
The invention relates to the technical field of environmental protection, in particular to a preparation method of a purification device for three-effect removal of steel smoke.
Background
The building industry in China is also rapidly developing, and particularly the steel industry is briskly rising. At the same time, serious air pollution, nitrogen Oxide (NO) is also generated x ) Is one of the main atmospheric pollutants discharged by the steel industry, in particular NO generated in the sintering process x Accounting for about 48 percent of the whole steel smelting process. On 27.6.2012, the ministry of environmental protection issued GB 28662-2012 "emission Standard of atmospheric pollutants for the iron and Steel sintering and pellet industry", which clearly stipulates the emission limits of atmospheric pollutants in the Standard, and also issued to Special regionsOr more stringent requirements for a particular time.
The prior treatment process of steel sintering flue gas in China generally comprises pre-denitration, middle-stage dust removal and final desulfurization. The selective reduction technology, namely SCR denitration technology is the most mature denitration technology in the prior art, and NH needs to be introduced into the technology 3 Is a reducing agent. The main pollutants in the flue gas after the desulfurization procedure are not completely removed x Carbon monoxide (CO), volatile organic pollutants (VOC), particulate matter that is not completely removed, fugitive ammonia that is not completely involved in the reaction, and the like. For example, in the steel industry, after denitration, dust removal and desulfurization processes are carried out, the flue gas contains NO x The amount is about 20mg/Nm 3 The CO content is about 1000mg/Nm 3 A VOC content of about 20mg/Nm 3 The escaped ammonia content is about 3mg/Nm 3 . Although NO is x The discharge amount reaches the limit value of national standard, but the near zero emission is not achieved yet, and the pollution to the atmosphere still exists; similarly, although the ammonia escape is within the limit range of national standard, a small amount of escaped ammonia is still an atmospheric pollutant. On the target setting of 'fourteen five' air pollution control, the ideas of 'ten atmosphere' and 'three-year action plan of blue sky guard war' are continued, and the targets are mainly designed around the aspects of air quality improvement and main pollutant emission reduction, wherein the targets comprise ozone and other emission reduction targets. The precursors of ozone pollution are VOC and nitrogen oxide, the emission of the ozone is controlled, the emission of the nitrogen oxide must be further controlled, and the synergistic treatment of the VOC is realized, so that the near zero emission of the flue gas is realized.
In the current kiln flue gas treatment process, if VOC is treated, a treatment device, such as a regenerative catalytic combustion device (RCO) or a regenerative thermal oxidation device (RTO), must be additionally arranged, so that the cost consumption and the site occupation are increased.
At present, few technologies capable of realizing near-zero emission of flue gas have certain technical and application defects. Patent CN105879622A discloses a two-stage denitration device for realizing near zero emission, comprising: one-level denitrification facility and second grade denitrification facility through spouting into ozone in to the flue gas, with the flue gas in the residual nitrogen oxide oxidation after the denitration for easily by the absorptive high valence nitrogen oxide of solution, realize finally that nitrogen oxide reaches the zero release level. Ozone is additionally added in the method, and the fourteen-five program particularly proposes the discharge control of the ozone, so that secondary ozone pollution is easy to generate; and the method only oxidizes the nitrogen oxide into higher-price nitrogen oxide which is easy to absorb, and does not completely eliminate pollutants. The utility model CN211487171U discloses an industry deNOx systems that contains Ru catalyst and utilizes CO reduction NO is equipped with heat transfer device and deoxygenator between desulfurizing tower and denitration reactor for flue gas after the deoxidization takes place the reaction in the denitration reactor under the effect of catalyst, generates carbon dioxide and nitrogen gas. In the method, a deoxygenator needs to be additionally arranged, the equipment is complex, and the catalyst adopts noble metal Ru, so that the cost is high.
Disclosure of Invention
The invention aims to solve the technical problems of high cost and easy generation of secondary pollution in the existing method for realizing near-zero emission of steel smoke.
The invention solves the technical problems through the following technical means:
a preparation method of a purification device for three-effect removal of steel smoke comprises the following steps:
(1) Adding a copper salt, a rare earth metal nitrate and pseudo-boehmite into deionized water, dropwise adding nitric acid into the deionized water, stirring and standing to form sol, wherein the molar ratio of the substances is copper salt: rare earth metal nitrates: pseudo-boehmite =1-3, 0.1-0.5, the molar ratio of nitric acid to pseudo-boehmite is 1;
(2) Cooling the sol formed in the step (1) to room temperature, adding a molecular sieve into the sol, stirring to form a suspension, and controlling the mass percent of the molecular sieve in the suspension to be 5%;
(3) Dipping treatment: dipping the steel wire mesh in the suspension liquid prepared in the step (2), keeping the suspension liquid for a period of time, pulling out the liquid level, blowing off redundant liquid on the surface by using an air gun, placing the dipped steel wire mesh in an oven for drying, and repeating the operation to control the solid matter load on the steel wire mesh to be 20%;
(4) And (3) calcining the dipped steel wire mesh at high temperature in the air atmosphere to obtain the steel flue gas three-effect removal purification device.
Compared with other methods for realizing the near zero emission of the steel flue gas, the purification device for the three-effect removal of the steel flue gas, which is prepared by the method, is directly arranged at the rear end of the denitration catalyst module, so that the near zero emission of the steel flue gas can be realized, the raw materials for preparing the purification device are simple and easy to obtain, the cost is low, the preparation method is simple, the large-scale production is easy, substances such as ozone and the like are not additionally added in the flue gas, and the possibility of secondary pollution is reduced.
Preferably, the copper salt in step (1) comprises one of copper nitrate, copper chloride or copper sulfate.
Preferably, the rare earth metal nitrate in step (1) comprises lanthanum nitrate or cerium nitrate.
Preferably, the stirring temperature in the step (1) is 50-70 ℃, and the stirring time is 3-5h.
Preferably, the standing temperature in the step (1) is 50-60 ℃, and the standing time is 8-10h.
Preferably, the molecular sieve in step (2) comprises an SSZ-13 molecular sieve or a SAPO-34 molecular sieve.
Preferably, the dipping time in the step (3) is 4-6min.
Preferably, the stirring time in the step (3) is 4h.
Preferably, the temperature of the oven in the step (3) is 80-120 ℃.
Preferably, the temperature of the high-temperature calcination in the step (4) is 500-600 ℃, and the calcination time is 4-8h.
The invention has the following beneficial effects:
1. compared with other methods for realizing the near zero emission of the steel flue gas, the purification device for the three-effect removal of the steel flue gas, which is prepared by the method, is directly arranged at the rear end of the denitration catalyst module, so that the near zero emission of the steel flue gas can be realized, the raw materials for preparing the purification device are simple and easy to obtain, the cost is low, the preparation method is simple, the large-scale production is easy, substances such as ozone and the like are not additionally added in the flue gas, and the possibility of secondary pollution is reduced.
2. The invention prepares the alumina sol containing copper salt, rare earth metal nitrate and molecular sieve, coats the alumina sol on the surface of a metal steel wire mesh, obtains the purification device capable of realizing the three-effect removal of steel smoke through drying and calcining, optimizes the components, the proportion and the process parameters, and when the molar ratio of each substance is copper salt: rare earth metal salt: the pseudo-boehmite = 2.3, the molecular sieve is SSZ-13, and when the solid content in the alumina sol is 8-14%, the content of the three pollutants after catalytic treatment is below 1ppm, thereby achieving the level of near zero emission.
Drawings
Fig. 1 is a schematic position diagram of the purification device for three-effect removal of steel flue gas prepared by the present invention in a denitration tower.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention and the drawings in the specification. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Test materials, reagents and the like used in the following examples are commercially available unless otherwise specified.
The specific techniques or conditions not specified in the examples can be performed according to the techniques or conditions described in the literature in the field or according to the product specification.
Example 1
A preparation method of a purification device for three-effect removal of steel smoke comprises the following steps:
(1) Adding copper nitrate, lanthanum nitrate and pseudo-boehmite into deionized water, dropwise adding nitric acid into the deionized water, stirring the mixture for 4 hours at the temperature of 60 ℃, standing the mixture for 10 hours at the temperature of 60 ℃ to form sol, wherein the molar ratio of the substances is as follows: lanthanum nitrate: pseudo-boehmite =1, 0.1, 10, the molar ratio of nitric acid to pseudo-boehmite is 1;
(2) Cooling the sol formed in the step (1) to room temperature, and then adding SSZ-13 molecular sieve (silica-alumina ratio 24, specific surface area 532 m) 2 Stirring for 4 hours to form a suspension, and controlling the mass percent of the molecular sieve in the suspension to be 5%;
(3) Dipping treatment: dipping the steel wire mesh in the suspension prepared in the step (2), keeping the suspension for 5min, pulling out the liquid level, blowing off excessive liquid on the surface by using an air gun, placing the dipped steel wire mesh in an oven at 100 ℃ for drying, and repeating the operation to control the solid matter load on the steel wire mesh to be 20%;
(4) And (3) calcining the dipped steel wire mesh at high temperature in the air atmosphere at 550 ℃ for 6h to obtain the steel flue gas three-effect removal purification device.
Example 2
A preparation method of a purification device for three-effect removal of steel smoke comprises the following steps:
(1) Adding copper chloride, lanthanum nitrate and pseudo-boehmite into deionized water, dropwise adding nitric acid into the deionized water, stirring the mixture for 4 hours at the temperature of 60 ℃, standing the mixture for 10 hours at the temperature of 60 ℃ to form sol, wherein the molar ratio of the substances is as follows: lanthanum nitrate: pseudo-boehmite = 2.1, wherein the molar ratio of nitric acid to pseudo-boehmite is 1;
(2) The sol formed in the step (1) is cooled to room temperature, and then SSZ-13 molecular sieve (silica-alumina ratio 24, specific surface area 532 m) is added into the sol 2 Stirring for 4 hours to form a suspension, and controlling the mass percent of the molecular sieve in the suspension to be 5%;
(3) Dipping treatment: dipping the steel wire mesh in the suspension liquid prepared in the step (2), keeping the suspension liquid for 5min, pulling out the liquid level, blowing off redundant liquid on the surface by using an air gun, drying the dipped steel wire mesh in a drying oven at 100 ℃, and repeating the operation to control the solid matter load on the steel wire mesh to be 20%;
(4) And (3) calcining the dipped steel wire mesh at high temperature in the air atmosphere at 550 ℃ for 6h to obtain the steel flue gas three-effect removal purification device.
Example 3
A preparation method of a purification device for three-effect removal of steel smoke comprises the following steps:
(1) Adding copper sulfate, lanthanum nitrate and pseudo-boehmite into deionized water, dropwise adding nitric acid into the deionized water, stirring the mixture for 4 hours at the temperature of 60 ℃, standing the mixture for 10 hours at the temperature of 60 ℃ to form sol, wherein the molar ratio of the substances is copper sulfate: lanthanum nitrate: pseudo-boehmite =3, 10, the molar ratio of nitric acid to pseudo-boehmite is 1;
(2) Cooling the sol formed in the step (1) to room temperature, and then adding SSZ-13 molecular sieve (silica-alumina ratio 24, specific surface area 532 m) 2 Stirring for 4 hours to form a suspension, and controlling the mass percent of the molecular sieve in the suspension to be 5%;
(3) Dipping treatment: dipping the steel wire mesh in the suspension prepared in the step (2), keeping the suspension for 5min, pulling out the liquid level, blowing off excessive liquid on the surface by using an air gun, placing the dipped steel wire mesh in an oven at 100 ℃ for drying, and repeating the operation to control the solid matter load on the steel wire mesh to be 20%;
(4) And (3) calcining the dipped steel wire mesh at high temperature in the air atmosphere at 550 ℃ for 6 hours to obtain the purification device for removing the steel flue gas in three effects.
Example 4
A preparation method of a purification device for three-effect removal of steel smoke comprises the following steps:
(1) Adding copper nitrate, lanthanum nitrate and pseudo-boehmite into deionized water, dropwise adding nitric acid into the deionized water, stirring the mixture for 4 hours at the temperature of 60 ℃, standing the mixture for 10 hours at the temperature of 60 ℃ to form sol, wherein the molar ratio of the substances is copper nitrate: lanthanum nitrate: pseudo-boehmite = 2.3, the molar ratio of nitric acid to pseudo-boehmite is 1;
(2) Cooling the sol formed in the step (1) to room temperature, and then adding SSZ-13 molecular sieve (silica-alumina ratio 24, specific surface area 532 m) 2 Stirring for 4 hours to form a suspension, and controlling the mass percent of the molecular sieve in the suspension to be 5%;
(3) Dipping treatment: dipping the steel wire mesh in the suspension prepared in the step (2), keeping the suspension for 5min, pulling out the liquid level, blowing off excessive liquid on the surface by using an air gun, placing the dipped steel wire mesh in an oven at 100 ℃ for drying, and repeating the operation to control the solid matter load on the steel wire mesh to be 20%;
(4) And (3) calcining the dipped steel wire mesh at high temperature in the air atmosphere at 550 ℃ for 6 hours to obtain the purification device for removing the steel flue gas in three effects.
Example 5
A preparation method of a purification device for three-effect removal of steel smoke comprises the following steps:
(1) Adding copper nitrate, lanthanum nitrate and pseudo-boehmite into deionized water, dropwise adding nitric acid into the deionized water, stirring the mixture for 4 hours at the temperature of 60 ℃, standing the mixture for 10 hours at the temperature of 60 ℃ to form sol, wherein the molar ratio of the substances is copper nitrate: lanthanum nitrate: pseudo-boehmite = 2.5, the molar ratio of nitric acid to pseudo-boehmite is 1;
(2) The sol formed in the step (1) is cooled to room temperature, and then SSZ-13 molecular sieve (silica-alumina ratio 24, specific surface area 532 m) is added into the sol 2 Stirring for 4 hours to form a suspension, and controlling the mass percent of the molecular sieve in the suspension to be 5%;
(3) Dipping treatment: dipping the steel wire mesh in the suspension prepared in the step (2), keeping the suspension for 5min, pulling out the liquid level, blowing off excessive liquid on the surface by using an air gun, placing the dipped steel wire mesh in an oven at 100 ℃ for drying, and repeating the operation to control the solid matter load on the steel wire mesh to be 20%;
(4) And (3) calcining the dipped steel wire mesh at high temperature in the air atmosphere at 550 ℃ for 6 hours to obtain the purification device for removing the steel flue gas in three effects.
Example 6
A preparation method of a purification device for three-effect removal of steel smoke comprises the following steps:
(1) Adding copper nitrate, cerium nitrate and pseudo-boehmite into deionized water, dropwise adding nitric acid into the deionized water, stirring the mixture for 4 hours at the temperature of 60 ℃, standing the mixture for 10 hours at the temperature of 60 ℃ to form sol, wherein the molar ratio of the substances is as follows: cerium nitrate: pseudo-boehmite = 2.3, the molar ratio of nitric acid to pseudo-boehmite is 1;
(2) Cooling the sol formed in the step (1) to room temperature, and then adding SSZ-13 molecular sieve (silica-alumina ratio 24, specific surface area 532 m) 2 Stirring for 4 hours to form a suspension, and controlling the mass percent of the molecular sieve in the suspension to be 5%;
(3) Dipping treatment: dipping the steel wire mesh in the suspension liquid prepared in the step (2), keeping the suspension liquid for 5min, pulling out the liquid level, blowing off redundant liquid on the surface by using an air gun, drying the dipped steel wire mesh in a drying oven at 100 ℃, and repeating the operation to control the solid matter load on the steel wire mesh to be 20%;
(4) And (3) calcining the dipped steel wire mesh at high temperature in the air atmosphere at 550 ℃ for 6h to obtain the steel flue gas three-effect removal purification device.
Example 7
A preparation method of a purification device for three-effect removal of steel smoke comprises the following steps:
(1) Adding copper nitrate, lanthanum nitrate and pseudo-boehmite into deionized water, dropwise adding nitric acid into the deionized water, stirring the mixture for 4 hours at the temperature of 60 ℃, standing the mixture for 10 hours at the temperature of 60 ℃ to form sol, wherein the molar ratio of the substances is copper nitrate: lanthanum nitrate: pseudo-boehmite = 2.3, the molar ratio of nitric acid to pseudo-boehmite is 1;
(2) Cooling the sol formed in the step (1) to room temperature, and then adding SAPO-34 molecular sieve (silica-alumina ratio of 24, specific surface area of 532 m) 2 Stirring for 4 hours to form a suspension, and controlling the mass percent of the molecular sieve in the suspension to be 5%;
(3) Dipping treatment: dipping the steel wire mesh in the suspension prepared in the step (2), keeping the suspension for 5min, pulling out the liquid level, blowing off excessive liquid on the surface by using an air gun, placing the dipped steel wire mesh in an oven at 100 ℃ for drying, and repeating the operation to control the solid matter load on the steel wire mesh to be 20%;
(4) And (3) calcining the dipped steel wire mesh at high temperature in the air atmosphere at 550 ℃ for 6 hours to obtain the purification device for removing the steel flue gas in three effects.
Example 8
A preparation method of a purification device for three-effect removal of steel smoke comprises the following steps:
(1) Adding copper nitrate, lanthanum nitrate and pseudo-boehmite into deionized water, dropwise adding nitric acid into the deionized water, stirring the mixture for 4 hours at the temperature of 60 ℃, standing the mixture for 10 hours at the temperature of 60 ℃ to form sol, wherein the molar ratio of the substances is copper nitrate: lanthanum nitrate: pseudo-boehmite = 2.3, the molar ratio of nitric acid to pseudo-boehmite is 1;
(2) Cooling the sol formed in the step (1) to room temperature, and then adding SSZ-13 molecular sieve (silica-alumina ratio 24, specific surface area 532 m) 2 Stirring for 4 hours to form a suspension, and controlling the mass percent of the molecular sieve in the suspension to be 5%;
(3) Dipping treatment: dipping the steel wire mesh in the suspension prepared in the step (2), keeping the suspension for 5min, pulling out the liquid level, blowing off excessive liquid on the surface by using an air gun, placing the dipped steel wire mesh in an oven at 100 ℃ for drying, and repeating the operation to control the solid matter load on the steel wire mesh to be 20%;
(4) And (3) calcining the dipped steel wire mesh at high temperature in the air atmosphere at 550 ℃ for 6h to obtain the steel flue gas three-effect removal purification device.
Example 9
A preparation method of a purification device for three-effect removal of steel smoke comprises the following steps:
(1) Adding copper nitrate, lanthanum nitrate and pseudo-boehmite into deionized water, dropwise adding nitric acid into the deionized water, stirring the mixture for 4 hours at the temperature of 60 ℃, standing the mixture for 10 hours at the temperature of 60 ℃ to form sol, wherein the molar ratio of the substances is copper nitrate: lanthanum nitrate: pseudo-boehmite = 2.3, the molar ratio of nitric acid to pseudo-boehmite is 1;
(2) Cooling the sol formed in the step (1) to room temperature, and then adding SSZ-13 molecular sieve (silica-alumina ratio 24, specific surface area 532 m) 2 Stirring for 4 hours to form a suspension, and controlling the mass percent of the molecular sieve in the suspension to be 5%;
(3) Dipping treatment: dipping the steel wire mesh in the suspension prepared in the step (2), keeping the suspension for 5min, pulling out the liquid level, blowing off excessive liquid on the surface by using an air gun, placing the dipped steel wire mesh in an oven at 100 ℃ for drying, and repeating the operation to control the solid matter load on the steel wire mesh to be 20%;
(4) And (3) calcining the dipped steel wire mesh at high temperature in the air atmosphere at 550 ℃ for 6h to obtain the steel flue gas three-effect removal purification device.
Example 10
The purification device for three-effect removal of steel flue gas prepared in example 4 is directly arranged at the rear end of the denitration catalyst module, as shown in fig. 1, the existing denitration device does not need to be changed, and the construction method is simple.
Evaluation of catalytic activity of purifier sample:
the wire mesh of examples 1-9 above was cut into samples of size 5mm x 5mm and placed in a fixed bed for denitration performance testing. Smoke components: NO, NH 3 Toluene and O 2 The concentration of the mixed gas is respectively 20ppm, 3ppm, 20ppm and 15 percent, and the airspeed of the mixed gas is 6000h -1 (ii) a The reaction temperature is 250 ℃; the reactor bed was packed with 60mL of a 5mm x 5mm size sample.
In the above examples, the types and the dosage ratios of copper salt and rare earth metal were examined, and the solid content of alumina and the types of molecular sieves in the alumina sol were examined.
1. The types and the dosage ratio of the copper salt are considered while other preparation conditions are kept unchanged, and as shown in table 1, when the molar ratio of the copper salt to the pseudo-boehmite is 2; too low content of copper in active sites leads to insufficient active species which can participate in the reaction, and when the content of active sites is too high, active site agglomeration occurs during calcination, and the particle size increases, leading to a decrease in activity.
TABLE 1 influence of copper salt species and dosage ratios on catalytic activity of purifier samples
| Catalyst and process for preparing same | Example 1 | Example 2 | Example 3 |
| Residual amount of NO (ppm) | 1.1 | 0.9 | 1.3 |
| NH 3 Residual quantity (ppm) | Not detected out | Not detected out | 0.4 |
| Residual amount of toluene (ppm) | 1.3 | 1.0 | 1.2 |
2. The dosage ratio of the rare earth metals is examined by keeping other preparation conditions unchanged, as shown in table 2, it can be seen that too low content of the rare earth metals results in too little auxiliary agent for forming a solid solution with active site copper, and when the content of the rare earth metals is too high, a part of active site copper is wrapped by the rare earth metals, and the active site copper cannot play an active role.
Table 2 shows the effect of the ratio of the amount of rare earth metals on the catalytic activity of the purifier sample
| Catalyst and process for preparing same | Example 2 | Example 4 | Example 5 |
| Residual amount of NO (ppm) | 0.9 | 0.6 | 1.1 |
| NH 3 Residual quantity (ppm) | Not detected out | Not detected out | 0.6 |
| Residual amount of toluene (ppm) | 1.0 | Not detected out | 1.2 |
3. The salt species of rare earth metals were examined with the other preparation conditions being maintained, and as shown in table 3, it can be seen that the salt species of rare earth metals have substantially no influence on the catalytic activity of the sample, because both cerium oxide and lanthanum oxide provide an oxygen storage function during the reaction.
TABLE 3 influence of rare earth metal salt species on catalytic activity of purifier samples
| Catalyst and process for preparing same | Example 4 | Example 6 |
| Residual amount of NO (ppm) | 0.6 | 0.7 |
| NH 3 Residual quantity (ppm) | Not detected out | Not detected out |
| Residual amount of toluene (ppm) | Not detected out | 0.8 |
4. The molecular sieve type was examined with other preparation conditions being kept unchanged, and as shown in Table 4, it can be seen that the activity of molecular sieve SSZ-13 is better than that of molecular sieve SAPO-34, because SSZ-13 is more acidic as a carrier than SAPO-34, and can adsorb more escaped ammonia during the reaction process.
TABLE 4 influence of molecular sieve species on catalytic activity of purifier samples
| Catalyst and process for producing the same | Example 4 | Example 7 |
| Residual amount of NO (ppm) | 0.6 | 1.5 |
| NH 3 Residual quantity (ppm) | Undetected | 0.7 |
| Residual amount of toluene (ppm) | Not detected out | 1.6 |
5. The solid content of the aluminum sol was examined while keeping other preparation conditions unchanged, as shown in table 5, it can be seen that when the solid content of the aluminum oxide in the aluminum sol is 8% and 14%, the catalytic activity of the sample of the purification device is not changed basically, and when the solid content is increased to 20%, the catalytic activity is obviously deteriorated, because the viscosity of the aluminum sol is very high, the uniform loading on the surface of the steel wire mesh is difficult, and the thicknesses of active substances on the surface of the steel wire mesh are different.
TABLE 5 influence of the solid content of the aluminum sol on the catalytic activity of the purifier samples
| Catalyst and process for preparing same | Example 4 | Example 8 | Example 9 |
| Residual amount of NO (ppm) | 0.6 | 0.7 | 0.9 |
| NH 3 Residual quantity (ppm) | Not detected out | Not detected out | Not detected out |
| Toluene residueAmount (ppm) | Undetected | Undetected | 1.1 |
In conclusion, compared with other methods for realizing near-zero emission of the steel flue gas, the purification device for removing the steel flue gas in a three-effect mode, which is prepared by the method, is directly arranged at the rear end of the denitration catalyst module, so that the near-zero emission of the steel flue gas can be realized, raw materials for preparing the purification device are simple and easy to obtain, the cost is low, the preparation method is simple, the amplification production is easy, substances such as ozone and the like are not additionally added into the flue gas, and the possibility of secondary pollution is reduced.
The invention prepares aluminum sol containing copper salt, rare earth metal nitrate and molecular sieve, coats the aluminum sol on the surface of a metal steel wire mesh, and obtains a purification device capable of realizing three-effect removal of steel smoke through drying and calcining, when the molar ratio of each substance is copper salt: rare earth metal salt: the pseudo-boehmite = 2.3, the molecular sieve is SSZ-13, and when the solid content in the alumina sol is 8-14%, the content of the three pollutants after catalytic treatment is below 1ppm, thereby achieving the level of near zero emission.
The above examples are only intended to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (9)
1. A preparation method of a purification device for three-effect removal of steel smoke is characterized by comprising the following steps:
(1) Adding a copper salt, a rare earth metal nitrate and pseudo-boehmite into deionized water, dropwise adding nitric acid into the deionized water, stirring, standing to form sol, wherein the molar ratio of the substances is copper salt: rare earth metal nitrate: pseudo-boehmite =1-3, 0.1-0.5, the molar ratio of nitric acid to pseudo-boehmite is 1;
(2) Cooling the sol formed in the step (1) to room temperature, then adding a molecular sieve into the sol, stirring the mixture to form a suspension, and controlling the mass percent of the molecular sieve in the suspension to be 5%; the molecular sieve is an SSZ-13 molecular sieve or an SAPO-34 molecular sieve;
(3) Dipping treatment: dipping the steel wire mesh in the suspension prepared in the step (2), keeping the suspension for a period of time, pulling out the liquid level, blowing off excessive liquid on the surface by using an air gun, placing the dipped steel wire mesh in an oven for drying, and repeating the operation to control the solid matter load on the steel wire mesh to be 20%;
(4) And (3) calcining the dipped steel wire mesh at high temperature in the air atmosphere to obtain the steel flue gas three-effect removal purification device.
2. The preparation method of the purification device for the three-effect removal of the steel flue gas according to claim 1, characterized in that: the copper salt in the step (1) comprises one of copper nitrate, copper chloride or copper sulfate.
3. The preparation method of the purification device for the three-effect removal of the steel flue gas according to claim 1, characterized in that: the rare earth metal nitrate in the step (1) comprises lanthanum nitrate or cerium nitrate.
4. The preparation method of the purification device for the three-effect removal of the steel flue gas according to claim 1, characterized in that: the stirring temperature in the step (1) is 50-70 ℃, and the stirring time is 3-5h.
5. The preparation method of the purification device for the three-effect removal of the steel flue gas according to claim 4, characterized in that: in the step (1), the standing temperature is 50-60 ℃, and the standing time is 8-10h.
6. The preparation method of the purification device for the three-effect removal of the steel flue gas according to claim 1, characterized in that: the dipping time in the step (3) is 4-6min.
7. The preparation method of the purification device for the three-effect removal of the steel flue gas according to claim 1, characterized in that: the stirring time in the step (3) is 4 hours.
8. The preparation method of the purification device for the three-effect removal of the steel flue gas according to claim 1, characterized in that: the temperature of the oven in the step (3) is 80-110 ℃.
9. The preparation method of the purification device for the three-effect removal of the steel flue gas according to claim 1, characterized in that: the temperature of the high-temperature calcination in the step (4) is 500-600 ℃, and the calcination time is 4-8h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110379667.7A CN112999865B (en) | 2021-04-08 | 2021-04-08 | Preparation method of purification device for three-effect removal of steel smoke |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110379667.7A CN112999865B (en) | 2021-04-08 | 2021-04-08 | Preparation method of purification device for three-effect removal of steel smoke |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112999865A CN112999865A (en) | 2021-06-22 |
| CN112999865B true CN112999865B (en) | 2023-01-31 |
Family
ID=76388328
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110379667.7A Active CN112999865B (en) | 2021-04-08 | 2021-04-08 | Preparation method of purification device for three-effect removal of steel smoke |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112999865B (en) |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2838336B2 (en) * | 1991-09-12 | 1998-12-16 | 工業技術院長 | Catalyst for catalytic reduction of nitrogen oxides |
| JP2848581B2 (en) * | 1992-08-06 | 1999-01-20 | 工業技術院長 | How to remove nitrogen oxides |
| US7754650B2 (en) * | 2004-11-10 | 2010-07-13 | Beijing Sj Environmental Protection And New Material Co., Ltd. | Trifunctional catalyst for sulphur transfer, denitrogenation and combustion promoting and a method for preparing the same |
| CN101733170B (en) * | 2008-11-14 | 2013-06-26 | 北京石油化工学院 | Method for improving bonding strength of metallic carrier of structured catalyst and coating of aluminum oxide |
| CN102008958B (en) * | 2010-11-09 | 2013-09-11 | 上海歌地催化剂有限公司 | Three-way catalyst used for purifying gasoline car tail gas and preparation method thereof |
| CN103084218A (en) * | 2013-01-28 | 2013-05-08 | 江苏帕艾尼尔科技有限公司 | Method for loading coating on sponge metal and coating prepared by same |
| CN103831095B (en) * | 2014-02-25 | 2016-08-24 | 新奥科技发展有限公司 | A kind of monoblock type metal composite catalyst and preparation method thereof |
| CN104069867A (en) * | 2014-07-11 | 2014-10-01 | 武汉大学 | Monolithic catalyst as well as preparation method and application thereof |
| CN108283883A (en) * | 2017-01-09 | 2018-07-17 | 青州日新特种材料有限公司 | NO in a kind of removing flue gasxMethod |
| JP7086975B2 (en) * | 2017-02-08 | 2022-06-20 | ビーエーエスエフ コーポレーション | Catalyst products |
| CN107998850A (en) * | 2017-12-07 | 2018-05-08 | 青岛惠城环保科技股份有限公司 | A kind of preparation method of catalytic cracking fuel gas sulfur transfer additive |
-
2021
- 2021-04-08 CN CN202110379667.7A patent/CN112999865B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN112999865A (en) | 2021-06-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2965812B1 (en) | Low-temperature scr catalyst for denitrating diesel vehicle exhaust, and preparation method thereof | |
| CN104941630B (en) | Low-temperature high-activity flue gas denitration catalyst and preparation thereof | |
| CN110052264B (en) | Preparation method of SCR denitration catalyst used under low temperature condition | |
| CN113813955B (en) | Method for preparing denitration catalyst coating slurry by using municipal sludge | |
| CN105879879A (en) | High-sulfur-resistant ultralow-temperature SCR (Selective Catalytic Reduction) denitration catalyst and preparation method thereof | |
| CN102861565A (en) | Aluminum oxide-loaded cerium oxide catalyst and preparation method and application thereof | |
| CN109794248A (en) | A kind of low cost catalyst for denitrating flue gas and its preparation, application method | |
| CN109174077A (en) | A kind of vehicle maintenance service catalyst and preparation method thereof | |
| CN113694933A (en) | High-entropy co-doped low-temperature SCR denitration catalyst and preparation method and application thereof | |
| CN107344101B (en) | Low-temperature desulfurization and denitrification catalyst, desulfurization and denitrification equipment and desulfurization and denitrification integrated process | |
| CN111437878A (en) | Cu-SAPO-34 molecular sieve, preparation method thereof and application thereof in selective catalytic reduction denitration | |
| CN111939917B (en) | DPF catalyst with good sulfur resistance and preparation method thereof | |
| CN112718018B (en) | Lanthanum cobaltite perovskite catalyst treated by acetic acid and preparation method thereof | |
| CN109745997A (en) | The preparation method of spherical cryogenic denitrating catalyst, the spherical cryogenic denitrating catalyst by this method preparation and its application | |
| CN112999865B (en) | Preparation method of purification device for three-effect removal of steel smoke | |
| CN110961114A (en) | Desulfurization and denitrification catalyst and preparation method thereof | |
| CN110605092B (en) | Iron-based rare earth oxygen storage type composite solid solution adsorbent and application thereof in flue gas dearsenification and demercuration | |
| CN110026204B (en) | Environment-friendly catalyst for removing dioxin and nitrogen oxide in synergy mode | |
| CN115555039B (en) | Non-noble metal DPF catalyst with good sulfur resistance and preparation method thereof | |
| CN116510745A (en) | Preparation method of catalyst for synergistic denitration and carbon monoxide removal | |
| CN110694621A (en) | Three-way catalyst and preparation method and application thereof | |
| CN114308069B (en) | Preparation method of denitration catalyst with ammonia decomposition function | |
| CN111530454B (en) | Low-temperature denitration catalyst and preparation method and application thereof | |
| CN111939905B (en) | Preparation method of catalyst for automobile exhaust, product and application thereof | |
| KR100275301B1 (en) | Method for removing nox using the natural manganese ores |
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 |