CN111499351B - Method for preparing porous purification stone by using excess sludge of cleaning waste SCR catalyst - Google Patents
Method for preparing porous purification stone by using excess sludge of cleaning waste SCR catalyst Download PDFInfo
- Publication number
- CN111499351B CN111499351B CN202010372201.XA CN202010372201A CN111499351B CN 111499351 B CN111499351 B CN 111499351B CN 202010372201 A CN202010372201 A CN 202010372201A CN 111499351 B CN111499351 B CN 111499351B
- Authority
- CN
- China
- Prior art keywords
- scr catalyst
- drying
- waste scr
- excess sludge
- sludge
- 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
- 239000010802 sludge Substances 0.000 title claims abstract description 76
- 239000003054 catalyst Substances 0.000 title claims abstract description 46
- 239000002699 waste material Substances 0.000 title claims abstract description 43
- 239000004575 stone Substances 0.000 title claims abstract description 41
- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000004140 cleaning Methods 0.000 title claims abstract description 25
- 238000000746 purification Methods 0.000 title claims description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 44
- 229910001868 water Inorganic materials 0.000 claims abstract description 39
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 32
- 239000000843 powder Substances 0.000 claims abstract description 31
- 238000010438 heat treatment Methods 0.000 claims abstract description 27
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 21
- 238000002156 mixing Methods 0.000 claims abstract description 20
- 239000011230 binding agent Substances 0.000 claims abstract description 18
- 239000004408 titanium dioxide Substances 0.000 claims abstract description 15
- 238000002791 soaking Methods 0.000 claims abstract description 9
- 235000015097 nutrients Nutrition 0.000 claims abstract description 7
- 238000003825 pressing Methods 0.000 claims abstract description 7
- 238000001035 drying Methods 0.000 claims description 41
- 238000005406 washing Methods 0.000 claims description 24
- 239000000203 mixture Substances 0.000 claims description 21
- 238000000197 pyrolysis Methods 0.000 claims description 16
- 239000000243 solution Substances 0.000 claims description 16
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 10
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 claims description 10
- 238000000227 grinding Methods 0.000 claims description 6
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 5
- 239000004793 Polystyrene Substances 0.000 claims description 5
- DZHMRSPXDUUJER-UHFFFAOYSA-N [amino(hydroxy)methylidene]azanium;dihydrogen phosphate Chemical compound NC(N)=O.OP(O)(O)=O DZHMRSPXDUUJER-UHFFFAOYSA-N 0.000 claims description 5
- 239000003513 alkali Substances 0.000 claims description 5
- 239000008367 deionised water Substances 0.000 claims description 5
- 229910021641 deionized water Inorganic materials 0.000 claims description 5
- 229910052757 nitrogen Inorganic materials 0.000 claims description 5
- 239000002202 Polyethylene glycol Substances 0.000 claims description 4
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 4
- 239000002253 acid Substances 0.000 claims description 4
- 230000007935 neutral effect Effects 0.000 claims description 4
- 229920001223 polyethylene glycol Polymers 0.000 claims description 4
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 4
- 239000012047 saturated solution Substances 0.000 claims description 4
- SPSSULHKWOKEEL-UHFFFAOYSA-N 2,4,6-trinitrotoluene Chemical compound CC1=C([N+]([O-])=O)C=C([N+]([O-])=O)C=C1[N+]([O-])=O SPSSULHKWOKEEL-UHFFFAOYSA-N 0.000 claims description 2
- 238000001816 cooling Methods 0.000 claims description 2
- 239000001038 titanium pigment Substances 0.000 claims description 2
- 238000007598 dipping method Methods 0.000 claims 2
- 239000000853 adhesive Substances 0.000 claims 1
- 230000001070 adhesive effect Effects 0.000 claims 1
- 241000251468 Actinopterygii Species 0.000 abstract description 17
- 239000000463 material Substances 0.000 abstract description 8
- 238000002360 preparation method Methods 0.000 abstract description 5
- 238000004064 recycling Methods 0.000 abstract description 4
- 230000007797 corrosion Effects 0.000 abstract description 3
- 238000005260 corrosion Methods 0.000 abstract description 3
- 238000003912 environmental pollution Methods 0.000 abstract description 3
- 231100000956 nontoxicity Toxicity 0.000 abstract description 3
- 239000002957 persistent organic pollutant Substances 0.000 abstract description 3
- 230000008569 process Effects 0.000 abstract description 3
- 238000004043 dyeing Methods 0.000 abstract 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 9
- 238000005303 weighing Methods 0.000 description 6
- 239000003344 environmental pollutant Substances 0.000 description 5
- 231100000719 pollutant Toxicity 0.000 description 5
- 230000000593 degrading effect Effects 0.000 description 4
- 239000000377 silicon dioxide Substances 0.000 description 4
- KKCBUQHMOMHUOY-UHFFFAOYSA-N sodium oxide Chemical compound [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 description 4
- 229910001948 sodium oxide Inorganic materials 0.000 description 4
- 238000001179 sorption measurement Methods 0.000 description 4
- 230000015556 catabolic process Effects 0.000 description 3
- 238000006731 degradation reaction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 229910001385 heavy metal Inorganic materials 0.000 description 3
- 210000001161 mammalian embryo Anatomy 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 3
- 235000012239 silicon dioxide Nutrition 0.000 description 3
- 238000005728 strengthening Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 229910044991 metal oxide Inorganic materials 0.000 description 2
- 150000004706 metal oxides Chemical class 0.000 description 2
- 231100000252 nontoxic Toxicity 0.000 description 2
- 230000003000 nontoxic effect Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 235000014653 Carica parviflora Nutrition 0.000 description 1
- 241000243321 Cnidaria Species 0.000 description 1
- 241000108664 Nitrobacteria Species 0.000 description 1
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 1
- 238000009395 breeding Methods 0.000 description 1
- 230000001488 breeding effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 210000003608 fece Anatomy 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 239000002920 hazardous waste Substances 0.000 description 1
- -1 hydroxyl free radical Chemical class 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000003340 mental effect Effects 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- SOQBVABWOPYFQZ-UHFFFAOYSA-N oxygen(2-);titanium(4+) Chemical compound [O-2].[O-2].[Ti+4] SOQBVABWOPYFQZ-UHFFFAOYSA-N 0.000 description 1
- 230000001699 photocatalysis Effects 0.000 description 1
- 239000011941 photocatalyst Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- 239000003403 water pollutant Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B33/00—Clay-wares
- C04B33/02—Preparing or treating the raw materials individually or as batches
- C04B33/13—Compounding ingredients
- C04B33/132—Waste materials; Refuse; Residues
- C04B33/1325—Hazardous waste other than combustion residues
- C04B33/1327—Hazardous waste other than combustion residues containing heavy metals
-
- 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
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
- B01J20/28014—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their form
- B01J20/28016—Particle form
-
- 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
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
- B01J20/28054—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their surface properties or porosity
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
- C02F1/32—Treatment of water, waste water, or sewage by irradiation with ultraviolet light
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/725—Treatment of water, waste water, or sewage by oxidation by catalytic oxidation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B33/00—Clay-wares
- C04B33/02—Preparing or treating the raw materials individually or as batches
- C04B33/13—Compounding ingredients
- C04B33/131—Inorganic additives
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B33/00—Clay-wares
- C04B33/02—Preparing or treating the raw materials individually or as batches
- C04B33/13—Compounding ingredients
- C04B33/1315—Non-ceramic binders
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B33/00—Clay-wares
- C04B33/02—Preparing or treating the raw materials individually or as batches
- C04B33/13—Compounding ingredients
- C04B33/132—Waste materials; Refuse; Residues
- C04B33/1328—Waste materials; Refuse; Residues without additional clay
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
- C04B35/6303—Inorganic additives
- C04B35/6316—Binders based on silicon compounds
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/02—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by adding chemical blowing agents
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/06—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by burning-out added substances by burning natural expanding materials or by sublimating or melting out added substances
- C04B38/063—Preparing or treating the raw materials individually or as batches
- C04B38/0635—Compounding ingredients
- C04B38/0645—Burnable, meltable, sublimable materials
- C04B38/067—Macromolecular compounds
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/46—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with organic materials
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/80—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only ceramics
- C04B41/81—Coating or impregnation
- C04B41/82—Coating or impregnation with organic materials
-
- 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
- B01J2220/00—Aspects relating to sorbent materials
- B01J2220/40—Aspects relating to the composition of sorbent or filter aid materials
- B01J2220/48—Sorbents characterised by the starting material used for their preparation
- B01J2220/4875—Sorbents characterised by the starting material used for their preparation the starting material being a waste, residue or of undefined composition
- B01J2220/4887—Residues, wastes, e.g. garbage, municipal or industrial sludges, compost, animal manure; fly-ashes
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/20—Nature of the water, waste water, sewage or sludge to be treated from animal husbandry
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/06—Nutrients for stimulating the growth of microorganisms
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/10—Photocatalysts
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3231—Refractory metal oxides, their mixed metal oxides, or oxide-forming salts thereof
- C04B2235/3232—Titanium oxides or titanates, e.g. rutile or anatase
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3418—Silicon oxide, silicic acids, or oxide forming salts thereof, e.g. silica sol, fused silica, silica fume, cristobalite, quartz or flint
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
- C04B2235/656—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment
- C04B2235/6562—Heating rate
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
- C04B2235/656—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment
- C04B2235/6567—Treatment time
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/60—Production of ceramic materials or ceramic elements, e.g. substitution of clay or shale by alternative raw materials, e.g. ashes
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Dispersion Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Hydrology & Water Resources (AREA)
- Water Supply & Treatment (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Analytical Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Microbiology (AREA)
- Toxicology (AREA)
- Health & Medical Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Biodiversity & Conservation Biology (AREA)
- Catalysts (AREA)
Abstract
The invention discloses a method for preparing a porous purified stone by using excess sludge of a cleaning waste SCR catalyst, which relates to the technical field of resource recycling and preparation of environment-friendly materials, and comprises the following steps: pretreating excess sludge generated by cleaning the waste SCR catalyst, uniformly mixing the obtained sludge powder with a pore-forming agent, titanium dioxide, a binder and water, pressing and carrying out heat treatment, and then soaking in a nutrient solution to obtain the porous purified stone. The purifying stone prepared by the method provided by the invention has the characteristics of high stability, light corrosion resistance, no toxicity and the like, does not generate secondary pollution in the treatment process, can degrade organic pollutants in the fish tank water, and can provide CO required by growth for green plants2. Meanwhile, the excess sludge generated by cleaning the waste SCR catalyst can be comprehensively utilized by the method provided by the invention, so that the resource recycling is realized, the natural resource is saved, and the environmental pollution is reducedAnd (6) dyeing.
Description
Technical Field
The invention relates to the technical field of resource recycling and preparation of environment-friendly materials, in particular to a method for preparing porous concave-convex clean stone by using residual sludge of a cleaned waste SCR catalyst and titanium dioxide.
Background
With the improvement of living standard of materials, people have higher requirements on the enjoyment of mental culture, and the development of the aquarium industry is just the expression of the change in family life of the times. Nowadays, the quality of life is more and more studied, and the breeding of aquarium fishes becomes one of the healthy leisure life contents of people. The quality of the water quality of the fish tank is directly related to whether the living environment of the fish is suitable or not, the frequent deterioration of the water quality of the fish tank not only increases the water changing frequency, but also can lead to the death of the fish more seriously, and the cost is increased and the income is reduced. Turbid aquarium water is often mixed with organic contaminants, which may be from fish, food, feces, etc.; the fish tank water purification stone can play a role in purifying and cleaning the water quality of the fish tank. At present, the purification stone frequently used is mainly used for adsorbing pollutants in water in a fish tank, the material of the purification stone is mainly made of active carbon, volcanic rock, coral sand and the like, the adsorption performance is not high, the pollutants cannot be degraded, most materials are taken from natural mineral substances, and then the materials need to be replaced in time when the adsorption is saturated, so that the consumption of natural resources can be caused.
The waste SCR catalyst is polluted by heavy metal pollutants, alkali (earth) metals, sulfur dioxide and other substances in high-content ash in flue gas, so that the SCR catalyst is poisoned, abraded and blocked, and the denitration performance of the catalyst is reduced and the catalyst cannot be used satisfactorily. Therefore, the COD content of the residual sludge generated by cleaning the waste SCR catalyst is low, the biodegradability is poor, and the treatment cost is high because the residual sludge contains a small amount of heavy metals and belongs to the category of hazardous waste HW 50.
Disclosure of Invention
In order to solve the problems of poor adsorption performance, incapability of degrading pollutants and non-environment-friendly materials of the existing purification stone and solve the problem of treatment of excess sludge generated by cleaning a waste SCR catalyst, the invention provides a method for preparing the purification stone which has good adsorption performance and can degrade water pollutants of a fish tank by using an environment-friendly material so as to solve the ecological problem of the water of the fish tank, and the technical scheme is as follows:
the invention provides a method for preparing porous purification stone by utilizing excess sludge of a cleaned waste SCR catalyst, which comprises the following steps:
(1) pretreating excess sludge generated by cleaning the waste SCR catalyst to obtain sludge powder;
(2) uniformly mixing sludge powder, a pore-forming agent, titanium dioxide, a binder and water, and drying;
(3) pressing the product obtained in the step (2) into a wet clean stone blank by using a mold, and drying;
(4) carrying out heat treatment on the dried blank;
(5) and (4) cooling the blank obtained in the step (4) to room temperature, soaking in nutrient solution, and drying to constant weight.
In some embodiments of the present invention, the method for pretreating excess sludge generated by washing the waste SCR catalyst in step (1) comprises the steps of:
1) drying the residual sludge generated by cleaning the waste SCR catalyst;
2) pyrolyzing the dried sludge;
3) soaking the product after pyrolysis in alkali liquor;
4) heating the obtained product;
5) washing the product obtained in the step 4) with acid liquor, washing with water to be neutral, drying to constant weight, and grinding into sludge powder;
preferably, the drying in the step 1) is carried out, wherein the drying temperature is 80-120 ℃, and more preferably 100 ℃; the drying time is 12-72h, and more preferably 24 h.
Preferably, the pyrolysis in the step 2) is performed under the protection of nitrogen, the pyrolysis temperature is 650-750 ℃, the pyrolysis time is 0.5-3h, and the temperature rise rate is 10-20 ℃/min, more preferably 15 ℃/min.
Preferably, the alkali liquor in the step 3) is a saturated KOH solution, and the soaking time is 12-48h, more preferably 24 h.
Preferably, the heat treatment in the step 4) is carried out at the temperature of 700-; the heat treatment time is 12-48h, more preferably 24 h.
Preferably, the acid solution in the step 5) is 10 wt% of dilute hydrochloric acid; the water for washing is deionized water, and the water temperature is 60-70 ℃; the grinding is carried out to obtain powder with the fineness of 80-160 meshes, and the fineness of 100 meshes is more preferable.
In some embodiments of the present invention, the mixing in step (2) is uniform, specifically: uniformly mixing a binder and water to obtain a mixture I, uniformly mixing sludge powder, a pore-forming agent and titanium dioxide to obtain a mixture II, adding the mixture II into the mixture I, and uniformly mixing; the drying is normal temperature drying, and the drying time is 12-48h, preferably 24 h.
Preferably, the binder in the step (2) is silica sol, and the silica sol contains 20-30% by weight of silica and 0.04-0.5% by weight of sodium oxide; TiO with the preferred fineness of 100 meshes and the purity of 97-99 wt percent is selected as titanium dioxide2Powder; the mass ratio of the sludge powder, the titanium pigment, the binder and the water is 100 (30-40) to 7.5-8 to 20-25; the pore-forming agent is one or more than two of 2, 4, 6-trinitrotoluene, Polystyrene (PS), polyvinyl alcohol (PVA) and polyethylene glycol (PEG), and the mass ratio of the sludge powder to the pore-forming agent is 100 (20-90).
The die in the step (3) is a die with any shape, preferably a concave-convex die; pressing under the pressure intensity of 8-10 MPa; the pressing time is 10-30min, preferably 20 min; and drying at the drying temperature of 60-80 ℃ for 24-48h until the water content is not higher than 3 wt%.
Preferably, the heat treatment in step (4) is carried out at the temperature of 800-; the heat treatment time is 2-4 h; the heating rate is 5-10 ℃/min.
Preferably, the nutrient solution in the step (5) is 0.5-0.8% by weight of urea phosphate solution; the impregnation time is 6-18h, preferably 12 h.
Advantageous effects
The method for preparing the porous concave-convex purification stone by utilizing the residual sludge of the waste SCR catalyst and the titanium dioxide has high stability and high resistanceLight corrosion, no toxicity, environmental protection and the like, and does not generate secondary pollution in the treatment process. The said purifying stone is suitable for purifying water quality of fish tank, TiO2As photocatalyst, especially anatase type TiO2Can generate hydroxyl free radical with strong oxidizability under the irradiation of ultraviolet light, and can oxidize and degrade organic matters to convert the organic matters into CO2、H2O and inorganic matters, has high degradation speed and no secondary pollution, can be used for degrading organic pollutants in the fish tank water, and can provide CO required by growth for green plants2. And the purifying stone is nontoxic to aquatic organisms such as fish and the like. The waste SCR catalyst sludge is doped with metal oxides, so that the activity of the purifying stone is increased, and the photocatalytic chemical reaction can be generated by using ultraviolet light or exposing the waste SCR catalyst sludge to sunlight. Metal oxide, TiO2And the metal is combined with a binder silica sol to form a stable crystalline molecular structure, so that the dissolution rate of the metal is almost zero, and the non-toxic effect is achieved. The concave-convex structure enables the purifying stone to have a larger specific surface area, the surface of the purifying stone can be fully contacted with a liquid reactant, and the degradation rate is improved. The nutrient solution dipped on the surface can provide nutrient substances for nitrobacteria in the fish tank, and is favorable for degrading ammonia nitrogen pollutants in water. Meanwhile, the excess sludge generated by cleaning the waste SCR catalyst can be comprehensively utilized by the method provided by the invention, so that the resource recycling is realized, the natural resources are saved, and the environmental pollution is reduced.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention.
The following examples and comparative examples are parallel runs, with the same processing steps and parameters, unless otherwise indicated.
Example 1 preparation of porous purification stone using excess sludge from washing of waste SCR catalyst:
(1) pretreating excess sludge generated by cleaning the waste SCR catalyst to obtain sludge powder;
1) drying 1kg of excess sludge for cleaning the waste SCR catalyst module at 100 ℃ for 24 h;
2) taking out the dried sludge, adopting nitrogen as protective gas, and heating to 700 ℃ at a heating rate of 15 ℃/min for pyrolysis, wherein the pyrolysis time is 0.5 h;
3) soaking the obtained pyrolysis sludge in a KOH saturated solution for 24 hours;
4) taking out the obtained product, heating to 800 ℃, and treating for 24 hours;
5) washing the obtained product with 10 wt% dilute hydrochloric acid solution, washing with 60 ℃ deionized water to be neutral, drying to constant weight, and grinding to 100 meshes to prepare sludge powder;
(2) weighing sludge powder, titanium dioxide, a binder and water according to the weight ratio of 100:35:7.5:20 respectively; weighing the pore-forming agent according to the weight ratio of the sludge powder to the pore-forming agent of 100: 40; firstly, uniformly mixing the weighed binder and water to obtain a mixture I, and then uniformly mixing the weighed cleaning waste SCR catalyst sludge powder, pore-forming agent and titanium dioxide to obtain a mixture II; wherein the binder is silica sol, the silica sol contains 20 wt% of silicon dioxide and 0.03 wt% of sodium oxide, and the pore-forming agent is Polystyrene (PS); adding the mixture II into the mixture I, uniformly mixing, and drying at normal temperature for 24 hours;
(3) placing the product obtained in the step (2) in a concave-convex mould, performing pressure strengthening for 20min at the pressure of 8MP, slowly reducing the pressure to obtain a concave-convex purified stone wet blank, and drying the blank in a drying oven at the temperature of 70 ℃ for 28h until the water content is less than or equal to 3%;
(4) raising the temperature of the dried blank to 900 ℃ at the heating rate of 5 ℃/min, and preserving the heat for 4 h;
(5) the obtained dry embryo is aired to a constant temperature, then is soaked in 0.5 percent wt urea phosphate solution for 12 hours, and then is dried to a constant weight; finally obtaining the porous concavo-convex clean stone.
Example 2 preparation of porous purification stone using excess sludge from washing of waste SCR catalyst:
(1) pretreating excess sludge generated by cleaning the waste SCR catalyst to obtain sludge powder;
1) drying 1kg of excess sludge for cleaning the waste SCR catalyst module at 100 ℃ for 24 h;
2) taking out the dried sludge, adopting nitrogen as protective gas, and raising the temperature to 750 ℃ at the temperature rise speed of 15 ℃/min for pyrolysis, wherein the pyrolysis time is 1.5 h;
3) soaking the obtained pyrolysis sludge in a KOH saturated solution for 24 hours;
4) taking out the obtained product, heating to 800 ℃, and treating for 24 hours;
5) washing the obtained product with 10 wt% dilute hydrochloric acid solution, washing with 65 ℃ deionized water to be neutral, drying to constant weight, and grinding to 100 meshes to prepare sludge powder;
(2) weighing sludge powder, titanium dioxide, a binder and water according to the weight ratio of 100:40:8:25 respectively; weighing the pore-forming agent according to the weight ratio of the sludge powder to the pore-forming agent of 100: 80; firstly, uniformly mixing the weighed binder and water to obtain a mixture I, and then uniformly mixing the weighed cleaning waste SCR catalyst sludge powder, pore-forming agent and titanium dioxide to obtain a mixture II; wherein the binder is silica sol, the silica sol contains 30 wt% of silicon dioxide and 0.1 wt% of sodium oxide, and the pore-forming agent is Polystyrene (PS); adding the mixture II into the mixture I, uniformly mixing, and drying at normal temperature for 24 hours;
(3) placing the product obtained in the step (2) in a concave-convex mould, performing pressure strengthening for 20min at the pressure of 10MP, slowly reducing the pressure to obtain a concave-convex purified stone wet blank, and drying the blank in a drying oven at the temperature of 80 ℃ for 24h until the water content is less than or equal to 3%;
(4) raising the temperature of the dried blank to 1000 ℃ at the heating rate of 5 ℃/min, and preserving the heat for 2 h;
(5) the obtained dry embryo is aired to a constant temperature, then is soaked in 0.6 percent wt urea phosphate solution for 12 hours, and then is dried to a constant weight; finally obtaining the porous concavo-convex clean stone.
Example 3 preparation of porous purification stone using excess sludge from washing of waste SCR catalyst:
(1) pretreating excess sludge generated by cleaning the waste SCR catalyst to obtain sludge powder;
1) drying 1kg of excess sludge for cleaning the waste SCR catalyst module at 100 ℃ for 24 h;
2) taking out the dried sludge, adopting nitrogen as protective gas, and heating to 650 ℃ at a heating speed of 15 ℃/min for pyrolysis, wherein the pyrolysis time is 3 h;
3) soaking the obtained pyrolysis sludge in a KOH saturated solution for 24 hours;
4) taking out the obtained product, heating to 800 ℃, and treating for 24 hours;
5) washing the obtained product with 10 wt% dilute hydrochloric acid solution, washing with deionized water at 70 ℃ to neutrality, drying to constant weight, and grinding to 100 meshes to obtain sludge powder;
(2) weighing sludge powder, titanium dioxide, a binder and water according to the weight ratio of 100:30:8:25 respectively; weighing the pore-forming agent according to the weight ratio of the sludge powder to the pore-forming agent of 100: 60; firstly, uniformly mixing the weighed binder and water to obtain a mixture I, and then uniformly mixing the weighed cleaning waste SCR catalyst sludge powder, pore-forming agent and titanium dioxide to obtain a mixture II; wherein the binder is silica sol, the silica sol contains 25 wt% of silicon dioxide and 0.03 wt% of sodium oxide, and the pore-forming agent is Polystyrene (PS); adding the mixture II into the mixture I, uniformly mixing, and drying at normal temperature for 24 hours;
(3) placing the product obtained in the step (2) in a concave-convex mould, performing pressure strengthening for 20min at the pressure of 8MP, slowly reducing the pressure to obtain a concave-convex purified stone wet blank, and drying the blank in a drying oven at the temperature of 60 ℃ for 28h until the water content is less than or equal to 3%;
(4) heating the dried blank to 800 ℃ at the heating rate of 10 ℃/min, and preserving the heat for 4 h;
(5) the obtained dry embryo is aired to a constant temperature, then is soaked in 0.8 percent wt urea phosphate solution for 12 hours, and then is dried to a constant weight; finally obtaining the porous concavo-convex clean stone.
And (3) performance detection:
cleaning of the relief prepared according to the methods of examples 1-3The stone (specification is 30mm 40mm 30mm) is respectively soaked in 1L, COD in 9 groups of 3 blockscrFish tank water with the concentration of 80 mg/L; the test pieces are placed under the sunlight and irradiated for 3 days, the irradiation time is 8 hours per day, and the test results of 3 groups of parallel test groups of each example are averaged. The results of the measurements are shown in the following table:
as can be seen, the purified stones COD obtained in examples 1 to 3crThe degradation rate is as high as 86.2 percent, and the heavy metal leaching rate is close to 0. The porous concave-convex purification stone prepared by utilizing the residual sludge of the waste SCR catalyst and the titanium dioxide can be used for degrading organic pollutants in the water of the fish tank, has the characteristics of high stability, light corrosion resistance, no toxicity, environmental protection and the like, and does not generate secondary pollution in the treatment process; meanwhile, the resource maximization utilization of the residual sludge of the cleaned waste SCR catalyst is realized, the environmental pollution is reduced, the production cost is reduced, and the purpose of resource utilization is achieved.
While the preferred embodiments and examples of the present invention have been described in detail, the present invention is not limited to the embodiments and examples, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.
Claims (9)
1. A method for preparing porous purification stone by utilizing excess sludge of a cleaning waste SCR catalyst is characterized by comprising the following steps: the method comprises the following steps:
(1) pretreating excess sludge generated by cleaning the waste SCR catalyst to obtain sludge powder;
(2) uniformly mixing sludge powder, a pore-forming agent, titanium dioxide, a binder and water, and drying;
(3) pressing the product obtained in the step (2) into a wet clean stone blank by using a mold, and drying;
(4) carrying out heat treatment on the dried blank;
(5) cooling the blank obtained in the step (4) to room temperature, soaking in nutrient solution, and drying to constant weight;
the method for pretreating excess sludge generated by cleaning the waste SCR catalyst in the step (1) comprises the following steps:
1) drying the residual sludge generated by cleaning the waste SCR catalyst;
2) pyrolyzing the dried sludge;
3) soaking the pyrolyzed product in alkali liquor;
4) heating the obtained product;
5) washing the product obtained in the step 4) with acid liquor, washing with water to be neutral, drying to constant weight, and grinding into sludge powder.
2. The method for preparing porous purification stone by using excess sludge from washing waste SCR catalyst according to claim 1, wherein: step 1), drying, wherein the drying temperature is 80-120 ℃; the drying time is 12-72 h.
3. The method for preparing porous purification stone by using excess sludge from washing waste SCR catalyst according to claim 1, wherein: and 2) carrying out pyrolysis under the protection of nitrogen, wherein the pyrolysis temperature is 650-750 ℃, the pyrolysis time is 0.5-3h, and the heating rate is 10-20 ℃/min.
4. The method for preparing porous purification stone by using excess sludge from washing waste SCR catalyst according to claim 1, wherein: and 3) the alkali liquor in the step 3) is a KOH saturated solution, and the dipping time is 12-48 h.
5. The method for preparing porous purification stone by using excess sludge from washing waste SCR catalyst according to claim 1, wherein: step 4), performing heat treatment at the temperature of 700-900 ℃; the heat treatment time is 12-48 h; step 5), the acid solution is 10 wt% of dilute hydrochloric acid; the water for washing is deionized water, and the water temperature is 60-70 ℃; the mixture is ground into powder with the fineness of 80-160 meshes.
6. The method for preparing porous purification stone by using excess sludge from washing waste SCR catalyst according to claim 1, wherein: uniformly mixing, specifically: uniformly mixing a binder and water to obtain a mixture I, uniformly mixing sludge powder, a pore-forming agent and titanium dioxide to obtain a mixture II, adding the mixture II into the mixture I, and uniformly mixing; the drying is normal temperature drying, and the drying time is 12-48 h.
7. The method for preparing porous purification stone by using excess sludge from washing waste SCR catalyst according to claim 6, wherein: the adhesive in the step (2) is silica sol; the mass ratio of the sludge powder, the titanium pigment, the binder and the water is 100 (30-40) to 7.5-8 to 20-25; the pore-forming agent is one or more than two of 2, 4, 6-trinitrotoluene, Polystyrene (PS), polyvinyl alcohol (PVA) and polyethylene glycol (PEG), and the mass ratio of the sludge powder to the pore-forming agent is 100 (20-90).
8. The method for preparing porous purification stone by using excess sludge from washing waste SCR catalyst according to claim 1, wherein: pressing in the step (3), wherein the pressure intensity is 8-10 MPa; the pressing time is 10-30 min; and drying at the drying temperature of 60-80 ℃ for 24-48h until the water content is not higher than 3 wt%.
9. The method for preparing porous purification stone by using excess sludge from washing waste SCR catalyst according to claim 1, wherein: the heat treatment in the step (4) is carried out at the temperature of 800-; the heat treatment time is 2-4 h; the heating rate is 5-10 ℃/min; the nutrient solution in the step (5) is 0.5-0.8 wt% of urea phosphate solution; the dipping time is 6-18 h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010372201.XA CN111499351B (en) | 2020-05-06 | 2020-05-06 | Method for preparing porous purification stone by using excess sludge of cleaning waste SCR catalyst |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010372201.XA CN111499351B (en) | 2020-05-06 | 2020-05-06 | Method for preparing porous purification stone by using excess sludge of cleaning waste SCR catalyst |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111499351A CN111499351A (en) | 2020-08-07 |
| CN111499351B true CN111499351B (en) | 2022-05-20 |
Family
ID=71868054
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010372201.XA Active CN111499351B (en) | 2020-05-06 | 2020-05-06 | Method for preparing porous purification stone by using excess sludge of cleaning waste SCR catalyst |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111499351B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104609753A (en) * | 2015-02-05 | 2015-05-13 | 郑志海 | Innocuous treatment process of waste flue gas denitration catalyst |
| CN110548748A (en) * | 2019-07-23 | 2019-12-10 | 周昊 | Collaborative melting treatment method for waste SCR flue gas denitration catalyst and fly ash |
| CN110773161A (en) * | 2019-10-21 | 2020-02-11 | 龙净科杰环保技术（上海）有限公司 | Preparation of three-dimensional foam TiO by using waste vanadium tungsten titanium SCR catalyst 2Method for preparing photocatalyst |
-
2020
- 2020-05-06 CN CN202010372201.XA patent/CN111499351B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104609753A (en) * | 2015-02-05 | 2015-05-13 | 郑志海 | Innocuous treatment process of waste flue gas denitration catalyst |
| CN110548748A (en) * | 2019-07-23 | 2019-12-10 | 周昊 | Collaborative melting treatment method for waste SCR flue gas denitration catalyst and fly ash |
| CN110773161A (en) * | 2019-10-21 | 2020-02-11 | 龙净科杰环保技术（上海）有限公司 | Preparation of three-dimensional foam TiO by using waste vanadium tungsten titanium SCR catalyst 2Method for preparing photocatalyst |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111499351A (en) | 2020-08-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109126772B (en) | Composite photocatalyst material and preparation method thereof | |
| CN110237818A (en) | A kind of preparation method and application of nitrogen sulphur codope charcoal | |
| CN107200350B (en) | TiO is prepared by template of corn stigma2The method of nano-tube array catalysis material | |
| CN110523379A (en) | A kind of low cost preparation method of porous charcoal | |
| CN102258990A (en) | Method for preparing light sewage treatment material | |
| CN108217868B (en) | Preparation method of composite algaecide with high algae removal rate | |
| CN107252699B (en) | Photocatalyst microsphere for indoor air purification and light storage and preparation method thereof | |
| CN110624534A (en) | Biological genetic WO3Photocatalyst and preparation method and application thereof | |
| CN112791699A (en) | ZrO (ZrO)2Preparation method of coal tar pitch-based composite activated carbon spheres | |
| CN114105290B (en) | Preparation method and application of modified blue algae biochar loaded nano zero-valent iron material | |
| CN111499351B (en) | Method for preparing porous purification stone by using excess sludge of cleaning waste SCR catalyst | |
| CA2754162A1 (en) | Photocatalyst and method for production | |
| CN112517046A (en) | Universal preparation method of hierarchical-pore nitrogen-doped carbon-oxygen reduction catalyst based on double-pore-foaming agent synthesis | |
| CN104353425A (en) | Coal ash capable of adsorbing formaldehyde and preparation method of coal ash | |
| CN108993603B (en) | Method for attaching graphene photocatalyst to surface of stone | |
| CN110540187A (en) | preparation method of clay/carbon aerogel material | |
| CN110773161A (en) | Preparation of three-dimensional foam TiO by using waste vanadium tungsten titanium SCR catalyst 2Method for preparing photocatalyst | |
| CN107262128B (en) | Visible light response type porous boron nitride-based composite photocatalytic material and preparation method thereof | |
| CN109317111B (en) | Preparation method of floatable foaming adsorbent loaded with nano photocatalyst | |
| Peng et al. | Thermal evolution of biochar in nature: A potential mode to enhance the self-cleaning of environmental DOC | |
| CN105582897A (en) | Cellulose adsorbing material for adsorbing heavy metals | |
| CN112387092A (en) | Formaldehyde scavenger composed of pure natural plant extracts and preparation method thereof | |
| CN101439198A (en) | Technique for coating photocatalyst on artificial flower | |
| CN105688835A (en) | Adsorption material capable of removing ammonia nitrogen in solution and preparation method of adsorption material | |
| CN103360102A (en) | Activated carbon diatom ooze wall material |
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 |