CN111068636A - Denitration catalyst regeneration cleaning solution and preparation method thereof - Google Patents
Denitration catalyst regeneration cleaning solution and preparation method thereof Download PDFInfo
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- CN111068636A CN111068636A CN201911133000.8A CN201911133000A CN111068636A CN 111068636 A CN111068636 A CN 111068636A CN 201911133000 A CN201911133000 A CN 201911133000A CN 111068636 A CN111068636 A CN 111068636A
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- cleaning solution
- denitration catalyst
- catalyst regeneration
- cleaning
- surfactant
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- 238000004140 cleaning Methods 0.000 title claims abstract description 70
- 239000003054 catalyst Substances 0.000 title claims abstract description 52
- 230000008929 regeneration Effects 0.000 title claims abstract description 26
- 238000011069 regeneration method Methods 0.000 title claims abstract description 26
- 238000002360 preparation method Methods 0.000 title abstract description 6
- 239000004094 surface-active agent Substances 0.000 claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 17
- 239000002562 thickening agent Substances 0.000 claims abstract description 13
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 6
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 22
- 238000003756 stirring Methods 0.000 claims description 12
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical group [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 10
- 235000014113 dietary fatty acids Nutrition 0.000 claims description 10
- 239000000194 fatty acid Substances 0.000 claims description 10
- 229930195729 fatty acid Natural products 0.000 claims description 10
- -1 polyoxyethylene Polymers 0.000 claims description 10
- 235000019864 coconut oil Nutrition 0.000 claims description 8
- 239000003240 coconut oil Substances 0.000 claims description 8
- 150000004665 fatty acids Chemical class 0.000 claims description 8
- LNOPIUAQISRISI-UHFFFAOYSA-N n'-hydroxy-2-propan-2-ylsulfonylethanimidamide Chemical compound CC(C)S(=O)(=O)CC(N)=NO LNOPIUAQISRISI-UHFFFAOYSA-N 0.000 claims description 8
- 230000000149 penetrating effect Effects 0.000 claims description 7
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 claims description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 6
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 6
- ONLRKTIYOMZEJM-UHFFFAOYSA-N n-methylmethanamine oxide Chemical compound C[NH+](C)[O-] ONLRKTIYOMZEJM-UHFFFAOYSA-N 0.000 claims description 6
- 229930182470 glycoside Natural products 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 5
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 5
- 125000000217 alkyl group Chemical group 0.000 claims description 4
- 239000002736 nonionic surfactant Substances 0.000 claims description 4
- WGYKZJWCGVVSQN-UHFFFAOYSA-N propylamine Chemical compound CCCN WGYKZJWCGVVSQN-UHFFFAOYSA-N 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 3
- 229920003171 Poly (ethylene oxide) Polymers 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 235000006408 oxalic acid Nutrition 0.000 claims description 2
- 238000005303 weighing Methods 0.000 claims description 2
- 125000003368 amide group Chemical group 0.000 claims 1
- 239000003599 detergent Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 12
- 230000008901 benefit Effects 0.000 abstract description 4
- 239000000463 material Substances 0.000 abstract description 2
- 230000035515 penetration Effects 0.000 abstract description 2
- 238000009736 wetting Methods 0.000 abstract description 2
- 239000002253 acid Substances 0.000 description 17
- 239000012459 cleaning agent Substances 0.000 description 9
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 5
- 239000003546 flue gas Substances 0.000 description 5
- GOLCXWYRSKYTSP-UHFFFAOYSA-N Arsenious Acid Chemical compound O1[As]2O[As]1O2 GOLCXWYRSKYTSP-UHFFFAOYSA-N 0.000 description 4
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 4
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 4
- 229910052593 corundum Inorganic materials 0.000 description 4
- JKQOBWVOAYFWKG-UHFFFAOYSA-N molybdenum trioxide Chemical compound O=[Mo](=O)=O JKQOBWVOAYFWKG-UHFFFAOYSA-N 0.000 description 4
- ZKATWMILCYLAPD-UHFFFAOYSA-N niobium pentoxide Chemical compound O=[Nb](=O)O[Nb](=O)=O ZKATWMILCYLAPD-UHFFFAOYSA-N 0.000 description 4
- 229910001845 yogo sapphire Inorganic materials 0.000 description 4
- 241000196324 Embryophyta Species 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- HZAXFHJVJLSVMW-UHFFFAOYSA-N 2-Aminoethan-1-ol Chemical compound NCCO HZAXFHJVJLSVMW-UHFFFAOYSA-N 0.000 description 2
- KKCBUQHMOMHUOY-UHFFFAOYSA-N Na2O Inorganic materials [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 description 2
- 229910052681 coesite Inorganic materials 0.000 description 2
- 229910052906 cristobalite Inorganic materials 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 229940051841 polyoxyethylene ether Drugs 0.000 description 2
- 229920000056 polyoxyethylene ether Polymers 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 229910052682 stishovite Inorganic materials 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- GFNGCDBZVSLSFT-UHFFFAOYSA-N titanium vanadium Chemical compound [Ti].[V] GFNGCDBZVSLSFT-UHFFFAOYSA-N 0.000 description 2
- 229910052905 tridymite Inorganic materials 0.000 description 2
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- IGFHQQFPSIBGKE-UHFFFAOYSA-N Nonylphenol Natural products CCCCCCCCCC1=CC=C(O)C=C1 IGFHQQFPSIBGKE-UHFFFAOYSA-N 0.000 description 1
- 238000003916 acid precipitation Methods 0.000 description 1
- 239000013543 active substance Substances 0.000 description 1
- 125000004442 acylamino group Chemical group 0.000 description 1
- 229940077388 benzenesulfonate Drugs 0.000 description 1
- 238000006065 biodegradation reaction Methods 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 239000013043 chemical agent Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000009849 deactivation Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 230000002779 inactivation Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- SNQQPOLDUKLAAF-UHFFFAOYSA-N nonylphenol Chemical compound CCCCCCCCCC1=CC=CC=C1O SNQQPOLDUKLAAF-UHFFFAOYSA-N 0.000 description 1
- 230000020477 pH reduction Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 230000000638 stimulation Effects 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Classifications
-
- 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
- B01J21/00—Catalysts comprising the elements, oxides, or hydroxides of magnesium, boron, aluminium, carbon, silicon, titanium, zirconium, or hafnium
- B01J21/20—Regeneration or reactivation
-
- 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
- B01D53/8621—Removing nitrogen compounds
- B01D53/8625—Nitrogen oxides
-
- 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
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/90—Regeneration or reactivation
- B01J23/92—Regeneration or reactivation of catalysts comprising metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
-
- 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
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/90—Regeneration or reactivation
- B01J23/94—Regeneration or reactivation of catalysts comprising metals, oxides or hydroxides of the 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
- B01J27/00—Catalysts comprising the elements or compounds of halogens, sulfur, selenium, tellurium, phosphorus or nitrogen; Catalysts comprising carbon compounds
- B01J27/28—Regeneration or reactivation
- B01J27/285—Regeneration or reactivation of catalysts comprising compounds of phosphorus
-
- 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
- B01J27/00—Catalysts comprising the elements or compounds of halogens, sulfur, selenium, tellurium, phosphorus or nitrogen; Catalysts comprising carbon compounds
- B01J27/28—Regeneration or reactivation
- B01J27/30—Regeneration or reactivation of catalysts comprising compounds of sulfur, selenium or tellurium
-
- 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
- B01J38/00—Regeneration or reactivation of catalysts, in general
- B01J38/48—Liquid treating or treating in liquid phase, e.g. dissolved or suspended
-
- 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
- B01J38/00—Regeneration or reactivation of catalysts, in general
- B01J38/48—Liquid treating or treating in liquid phase, e.g. dissolved or suspended
- B01J38/50—Liquid treating or treating in liquid phase, e.g. dissolved or suspended using organic liquids
- B01J38/52—Liquid treating or treating in liquid phase, e.g. dissolved or suspended using organic liquids oxygen-containing
-
- 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
- B01J38/00—Regeneration or reactivation of catalysts, in general
- B01J38/48—Liquid treating or treating in liquid phase, e.g. dissolved or suspended
- B01J38/60—Liquid treating or treating in liquid phase, e.g. dissolved or suspended using acids
-
- 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
- B01J38/00—Regeneration or reactivation of catalysts, in general
- B01J38/48—Liquid treating or treating in liquid phase, e.g. dissolved or suspended
- B01J38/64—Liquid treating or treating in liquid phase, e.g. dissolved or suspended using alkaline material; using salts
Abstract
The invention relates to a denitration catalyst regeneration cleaning solution, which comprises the following components: surfactant (b): 0.2-10.0 wt%; cleaning auxiliary agent: 1-20 wt%; thickening agent: 0.2-3 wt%; penetrant: 0.1-1 wt%; pH regulators: 0.2-6 wt%. A preparation method of a denitration catalyst regeneration cleaning solution comprises the following steps: surfactant (b): 0.2-10.0 wt%; cleaning auxiliary agent: 1-20 wt%; thickening agent: 0.2-3 wt%; penetrant: 0.1-1 wt%; pH regulators: 0.2-6 wt%. The cleaning solution can reduce the surface tension of water, improve the wetting property of the surface of a material and promote the penetration of the cleaning solution; the formula is a green and environment-friendly formula, is environment-friendly, is easily biodegradable, has low price, can realize high-performance cleaning effect on the catalyst ash scale, and can alleviate V to a certain extent2O5The loss of the catalyst has better economic benefit.
Description
Technical Field
The invention relates to the field of denitration catalysts, in particular to a denitration catalyst regeneration cleaning solution and a preparation method thereof.
Background
The nitrogen oxides NOx emitted from flue gas are one of the main pollutants in the atmosphere, and NOx is an important precursor of acid rain and is liable to generate photochemical smog. At present, the discharge amount of NOx in China is increased day by day, NOx in flue gas is removed in various ways, and an SCR flue gas denitration technology is a main control technology for realizing deep NOx emission reduction of the current coal-fired power plant boiler. In the SCR plant, the catalyst is the most central component, and its performance directly affects the final denitrification efficiency of the reactor. Catalyst deactivation occurs after a period of use and performance decreases with increasing run time, catalyst regeneration is an efficient solution to extend catalyst life and reduce capital costs compared to replacing a new catalyst or adding a spare layer of catalyst.
The regeneration of the catalyst mainly carries out pore channel dredging by various physical and chemical means, removes harmful substances on the surface and increases active sites, and the key technology lies in the research and development of a formula of efficient cleaning liquid and a cleaning process. The regeneration technology of the SCR catalyst at present mainly comprises water washing regeneration, thermal reduction regeneration, acid liquor regeneration and SO2 acidification thermal regeneration. The coal quality conditions of power plants are different, the inactivation reasons and degrees are different, and the cleaning process is different.
At present, the catalyst is commonly cleaned by using 0.5mol/L dilute sulfuric acid in China, partial catalyst activity can be recovered, but vanadium is seriously lost; the other method is to use 0.5mol/L sulfuric acid solution and 0.01mol/L hydrofluoric acid solution to clean and regenerate the catalyst, the cleaning effect is good, but the hydrofluoric acid operation is dangerous, and the treatment difficulty of the fluorine-containing wastewater is high, and the green environmental protection degree is poor. The existing cleaning liquid mostly takes surfactants compounded by alkylphenol polyoxyethylene ether, nonylphenol polyoxyethylene ether and sodium alkyl benzene sulfonate as main components, and the surfactants are difficult to biodegrade to protect the environment and reduce the pollution to the nature.
Disclosure of Invention
The invention aims to provide a denitration catalyst regeneration cleaning solution which is applied to the field of catalyst regeneration in the power industry, such as a V-Ti catalyst.
In order to achieve the purpose, the invention adopts the technical scheme that:
a denitration catalyst regeneration cleaning solution comprises the following components:
surfactant (b): 0.2-10.0 wt%;
cleaning auxiliary agent: 1-20 wt%;
thickening agent: 0.2-3 wt%;
penetrant: 0.1-1 wt%;
pH regulators: 0.2-6 wt%.
Preferably, the surfactant is a nonionic surfactant.
More preferably, the nonionic surfactant is coconut oil fatty acid diethanolamide, alkyl amidopropyl dimethyl amine oxide, coconut oil fatty acid monoethanolamide, and polyoxyethylene fatty acid ester, preferably coconut oil fatty acid diethanolamide, and has good penetrating and decontaminating properties.
Preferably, the cleaning auxiliary agent is alkyl glycoside, dimethyl amine oxide, alkyl acylamino propylamine dimethyl amine oxide, preferably alkyl glycoside, has better foaming performance, low stimulation and easy biodegradation, and can be well compounded with coconut oil fatty acid ethanolamine to realize synergistic action.
Preferably, the pH regulator is at least one of sulfuric acid, sulfamic acid, oxalic acid and citric acid.
Further preferably, the pH regulator is sulfuric acid and/or sulfamic acid, the sulfuric acid is 0.2-3wt%, the sulfamic acid is 0.5-3wt%, and the sulfuric acid and the sulfamic acid can regulate the pH value of the cleaning solution, maintain the acidity of the cleaning solution and facilitate cleaning of ash scale in the catalyst.
Preferably, the penetrant is a JFC penetrant.
Preferably, the thickening agent is sodium carbonate, and the sodium carbonate thickening agent can maintain the stability of the cleaning solution and can also be used as a pH regulator.
The invention also aims to provide a preparation method of the denitration catalyst regeneration cleaning solution.
In order to achieve the purpose, the invention adopts the technical scheme that:
a preparation method of a denitration catalyst regeneration cleaning solution comprises the following steps:
s1: preparing a surfactant, a cleaning assistant, a penetrating agent, a thickening agent and a pH regulator;
s2, weighing the water according to the formula ratio, and starting the stirrer.
Adding surfactant with water content of 0.2-10.0wt%, and stirring.
Adding a cleaning assistant with the water content of 1-20wt%, and uniformly stirring.
Adding penetrating agent with water content of 0.1-1wt%, and stirring.
Adding thickener with water content of 0.2-3wt%, and stirring.
Adding pH regulator with water content, and stirring.
Preferably, the surfactant, the cleaning assistant, the penetrating agent, the thickening agent and the pH regulator are sequentially added and uniformly stirred.
Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages and effects:
the cleaning solution can reduce the surface tension of water, improve the wetting property of the surface of a material and promote the penetration of the cleaning solution; the formula is a green and environment-friendly formula, is environment-friendly, is easily biodegradable, has low price, can realize high-performance cleaning effect on the catalyst ash scale, and can alleviate V to a certain extent2O5The loss of the catalyst has better economic benefit.
Detailed Description
The invention is further described below with reference to the examples:
the first embodiment is as follows:
the cleaning solution is prepared from the following components in parts by weight: to 1kg of water were added in the following order: 5 wt% of coconut oil fatty acid diethanolamide, 2 wt% of alkyl glycoside, 0.1 wt% of JFC penetrant, 1wt% of sodium carbonate and 1wt% of sulfuric acid, and uniformly stirring to obtain the cleaning solution.
The old catalyst (vanadium-titanium honeycomb catalyst used in the SCR flue gas denitration device of the coal-fired power plant) of a certain catalyst plant is cleaned by using a common acid solution, a mixed acid solution, a commercially available cleaning agent 1 and a commercially available cleaning agent 2, respectively, and the cleaning solution of this embodiment. Detecting the element content on the surface of the catalyst before and after cleaning, and performing performance comparison:
table one: the catalyst adopts cleaning solutions with different formulas to compare the content of surface elements before and after cleaning:
| before cleaning | Common acid | Mixed acid | Commercially available 1 | On the market 2 | Example one | |
| TiO2 | 79.40 | 77.16 | 77.47 | 78.04 | 78.79 | 80.65 |
| WO3 | 4.35 | 4.12 | 4.14 | 4.19 | 4.20 | 4.32 |
| MoO3 | 0.05 | 0.05 | 0.05 | 0.05 | 0.05 | 0.05 |
| V2O5 | 0.56 | 0.39 | 0.36 | 0.41 | 0.48 | 0.54 |
| SO3 | 2.63 | 0.85 | 0.73 | 0.52 | 0.65 | 0.32 |
| SiO2 | 10.98 | 8.00 | 6.89 | 5.85 | 4.59 | 3.15 |
| Al2O3 | 3.37 | 1.76 | 1.62 | 1.48 | 1.41 | 1.14 |
| Fe2O3 | 0.50 | 0.60 | 0.64 | 0.52 | 0.42 | 0.44 |
| MgO | 0.41 | 0.34 | 0.29 | 0.26 | 0.30 | 0.18 |
| CaO | 2.28 | 1.68 | 1.73 | 1.04 | 0.98 | 0.59 |
| Nb2O5 | 0.15 | 0.15 | 0.15 | 0.16 | 0.17 | 0.17 |
| K2O | 0.17 | 0.09 | 0.06 | 0.06 | 0.04 | 0.03 |
| Na2O | 0.07 | N/A | N/A | N/A | N/A | N/A |
| P2O5 | 0.18 | 0.12 | 0.10 | 0.05 | 0.08 | 0.07 |
| As2O3 | 0.09 | 0.07 | 0.07 | 0.05 | 0.07 | 0.05 |
| HgO | 0.07 | 0.08 | 0.08 | 0.08 | 0.07 | 0.07 |
| ZrO2 | NA | NA | NA | NA | NA | NA |
Through comparison: the cleaning solution has a good cleaning effect, and can remarkably reduce ash scale, namely SiO in the original catalyst2And Al2O3The content of (a). Common acid and mixed acid liquor have poor cleaning effect due to lack of permeation and adhesion entrainment of a surfactant; the two types of cleaning agents sold in the market have common cleaning effect and can remove part of dust and dirt; after the common acid liquor and the mixed acid liquor are cleaned, the active substance V is generated2O5A large amount of loss, and the need to carry out the loading of the active component again, increase the production cost.
Example two:
the cleaning solution is prepared from the following components in parts by weight: to 1kg of water were added in the following order: 8 wt% of coconut oil fatty acid diethanolamide, 3wt% of alkyl glycoside, 0.1 wt% of JFC penetrant, 1wt% of sodium carbonate, 2 wt% of sulfamic acid and 3wt% of sulfuric acid, and uniformly stirring to obtain the cleaning solution.
The old catalyst (vanadium-titanium honeycomb catalyst used in the SCR flue gas denitration device of the coal-fired power plant) of a certain catalyst plant is cleaned by using a common acid solution, a mixed acid solution, a commercially available cleaning agent 1 and a commercially available cleaning agent 2, respectively, and the cleaning solution of this embodiment. Detecting the element content on the surface of the catalyst before and after cleaning, and performing performance comparison:
table two: catalytic converterComparing the element contents of the surfaces of the chemical agent before and after cleaning by adopting cleaning agents with different formulas:
| before cleaning | Common acid | Mixed acid | Commercially available 1 | On the market 2 | Example two | |
| TiO2 | 81.33 | 78.47 | 80.16 | 79.66 | 81.76 | 83.54 |
| WO3 | 4.63 | 4.29 | 4.36 | 4.38 | 4.46 | 4.54 |
| MoO3 | 0.04 | 0.04 | 0.03 | 0.04 | 0.04 | 0.04 |
| V2O5 | 0.66 | 0.42 | 0.47 | 0.56 | 0.59 | 0.62 |
| SO3 | 3.80 | 1.46 | 1.36 | 0.97 | 1.08 | 0.74 |
| SiO2 | 13.00 | 10.79 | 9.48 | 6.04 | 5.06 | 2.60 |
| Al2O3 | 1.64 | 1.63 | 1.44 | 1.32 | 1.01 | 0.59 |
| Fe2O3 | 0.15 | 0.31 | 0.45 | 0.28 | 0.40 | 0.29 |
| MgO | 0.10 | 0.10 | 0.10 | 0.08 | 0.08 | 0.06 |
| CaO | 1.85 | 1.05 | 0.96 | 0.88 | 0.76 | 0.61 |
| Nb2O5 | 0.20 | 0.22 | 0.22 | 0.23 | 0.23 | 0.23 |
| K2O | 0.09 | NA | NA | NA | NA | NA |
| Na2O | NA | NA | NA | NA | NA | NA |
| P2O5 | 0.13 | 0.08 | 0.09 | 0.09 | 0.10 | 0.06 |
| As2O3 | 0.06 | 0.05 | 0.04 | 0.05 | NA | NA |
| HgO | 0.10 | 0.11 | 0.09 | 0.11 | 0.10 | 0.09 |
| ZrO2 | NA | NA | NA | NA | NA | NA |
By comparison, the cleaning solution of the embodiment has better cleaning effect, and can remarkably reduce ash scale, namely SiO in the original catalyst2And Al2O3The content of (a). Common acid and mixed acid liquor have poor cleaning effect due to lack of permeation and adhesion entrainment of a surfactant; the two types of cleaning agents sold in the market have common cleaning effect and can remove part of dust and dirt; the common acid liquor cleaning and the mixed acid cleaning can cause a large amount of loss of V2O5, the general cleaning agent is not strong in acidity, and the surface of the catalyst is covered with a surfactant to play a certain protection role and slow down V2O5Loss of the catalyst.
In conclusion, the formula of the cleaning solution is a green and environment-friendly formula, is environment-friendly, is biodegradable and is high in priceThe cleaning agent is low in cost, can realize high-performance cleaning effect on catalyst ash scale, and can moderate V to a certain extent2O5The loss of the catalyst has better economic benefit.
The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (10)
1. A denitration catalyst regeneration cleaning solution is characterized in that: which comprises the following components:
surfactant (b): 0.2-10.0 wt%;
cleaning auxiliary agent: 1-20 wt%;
thickening agent: 0.2-3 wt%;
penetrant: 0.1-1 wt%;
pH regulators: 0.2-6 wt%.
2. The denitration catalyst regeneration cleaning solution as set forth in claim 1, characterized in that: the surfactant is a nonionic surfactant.
3. The denitration catalyst regeneration cleaning solution as set forth in claim 2, characterized in that: the nonionic surfactant is coconut oil fatty acid diethanolamide, alkyl amidopropyl dimethyl amine oxide, coconut oil fatty acid monoethanolamide, and polyoxyethylene fatty acid ester.
4. The denitration catalyst regeneration cleaning solution as set forth in claim 1, characterized in that: the cleaning auxiliary agent is alkyl glycoside, dimethyl amine oxide, and alkyl amido propylamine dimethyl amine oxide.
5. The denitration catalyst regeneration cleaning solution as set forth in claim 1, characterized in that: the pH regulator is at least one of sulfuric acid, sulfamic acid, oxalic acid and citric acid.
6. The denitration catalyst regeneration cleaning solution as set forth in claim 5, characterized in that: the pH regulator is sulfuric acid and/or sulfamic acid, the sulfuric acid accounts for 0.2-3wt%, and the sulfamic acid accounts for 0.5-3 wt%.
7. The denitration catalyst regeneration cleaning solution as set forth in claim 1, characterized in that: the penetrant is a JFC penetrant.
8. The denitration catalyst regeneration cleaning solution as set forth in claim 1, characterized in that: the thickening agent is sodium carbonate.
9. A method for producing the denitration catalyst regeneration cleaning liquid as described in any one of claims 1 to 8, characterized in that: the method comprises the following steps:
s1: preparing a detergent composition comprising a surfactant, a cleaning assistant, a thickening agent, a penetrating agent and a pH regulator;
s2, weighing the water according to the formula ratio, starting the stirrer,
adding surfactant with water content of 0.2-10.0wt%, stirring,
adding cleaning assistant with water content of 1-20wt%, stirring,
adding penetrating agent with water content of 0.1-1wt%, stirring,
adding thickener with water content of 0.2-3wt%, stirring,
adding water content PH regulator, and stirring.
10. The method of claim 9, wherein: the surfactant, the cleaning assistant, the penetrating agent, the thickening agent and the PH regulator are sequentially added and uniformly stirred.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112473752A (en) * | 2020-11-27 | 2021-03-12 | 华能武汉发电有限责任公司 | High-dust-blockage honeycomb type SCR denitration catalyst cleaning solution and preparation and cleaning methods thereof |
| CN112657559A (en) * | 2020-11-06 | 2021-04-16 | 苏州西热节能环保技术有限公司 | Method for realizing synchronous denitration and dioxin removal by modification and regeneration of deactivated SCR catalyst |
| CN113600248A (en) * | 2021-08-19 | 2021-11-05 | 苏州西热节能环保技术有限公司 | Thallium-poisoned denitration catalyst regeneration method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106607106A (en) * | 2015-10-26 | 2017-05-03 | 浙江浙能技术研究院有限公司 | Activity regenerating and performance optimizing method of SCR catalyst for sulfur, arsenic and phosphorus poisoning |
| CN106732655A (en) * | 2016-12-05 | 2017-05-31 | 江苏肯创催化剂再生技术有限公司 | A kind of arsenic poisoning SCR denitration renovation process |
| CN107937171A (en) * | 2017-11-29 | 2018-04-20 | 黑龙江省科学院高技术研究院 | A kind of low bubble green CIP sterilization concentrated type cleaning agents |
| CN109055960A (en) * | 2018-09-07 | 2018-12-21 | 合肥绿洁环保科技有限公司 | A kind of low bubble cleaning agent of metal cleaning |
-
2019
- 2019-11-19 CN CN201911133000.8A patent/CN111068636B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106607106A (en) * | 2015-10-26 | 2017-05-03 | 浙江浙能技术研究院有限公司 | Activity regenerating and performance optimizing method of SCR catalyst for sulfur, arsenic and phosphorus poisoning |
| CN106732655A (en) * | 2016-12-05 | 2017-05-31 | 江苏肯创催化剂再生技术有限公司 | A kind of arsenic poisoning SCR denitration renovation process |
| CN107937171A (en) * | 2017-11-29 | 2018-04-20 | 黑龙江省科学院高技术研究院 | A kind of low bubble green CIP sterilization concentrated type cleaning agents |
| CN109055960A (en) * | 2018-09-07 | 2018-12-21 | 合肥绿洁环保科技有限公司 | A kind of low bubble cleaning agent of metal cleaning |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112657559A (en) * | 2020-11-06 | 2021-04-16 | 苏州西热节能环保技术有限公司 | Method for realizing synchronous denitration and dioxin removal by modification and regeneration of deactivated SCR catalyst |
| CN112473752A (en) * | 2020-11-27 | 2021-03-12 | 华能武汉发电有限责任公司 | High-dust-blockage honeycomb type SCR denitration catalyst cleaning solution and preparation and cleaning methods thereof |
| CN113600248A (en) * | 2021-08-19 | 2021-11-05 | 苏州西热节能环保技术有限公司 | Thallium-poisoned denitration catalyst regeneration method |
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