CN113860691A - Preparation method of sludge reinforced high-elasticity rubber filler - Google Patents
Preparation method of sludge reinforced high-elasticity rubber filler Download PDFInfo
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- CN113860691A CN113860691A CN202111219792.8A CN202111219792A CN113860691A CN 113860691 A CN113860691 A CN 113860691A CN 202111219792 A CN202111219792 A CN 202111219792A CN 113860691 A CN113860691 A CN 113860691A
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- sludge
- slurry
- rubber
- modified
- reinforced
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- 239000010802 sludge Substances 0.000 title claims abstract description 227
- 229920001971 elastomer Polymers 0.000 title claims abstract description 72
- 239000005060 rubber Substances 0.000 title claims abstract description 72
- 239000000945 filler Substances 0.000 title claims abstract description 43
- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- 239000002002 slurry Substances 0.000 claims abstract description 74
- 239000002245 particle Substances 0.000 claims abstract description 49
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 36
- 238000001035 drying Methods 0.000 claims abstract description 26
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims abstract description 24
- 238000001704 evaporation Methods 0.000 claims abstract description 23
- 230000008020 evaporation Effects 0.000 claims abstract description 22
- 239000007787 solid Substances 0.000 claims abstract description 20
- 239000007788 liquid Substances 0.000 claims abstract description 19
- 238000004062 sedimentation Methods 0.000 claims abstract description 19
- 238000000926 separation method Methods 0.000 claims abstract description 17
- 238000004806 packaging method and process Methods 0.000 claims abstract description 13
- 238000010438 heat treatment Methods 0.000 claims abstract description 12
- 239000000126 substance Substances 0.000 claims abstract description 11
- 239000000843 powder Substances 0.000 claims description 51
- 238000000034 method Methods 0.000 claims description 29
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 claims description 19
- -1 dioctyloxy pyrophosphate ethylene titanate Chemical compound 0.000 claims description 17
- 239000007789 gas Substances 0.000 claims description 15
- 238000003756 stirring Methods 0.000 claims description 15
- 230000008569 process Effects 0.000 claims description 12
- 239000010865 sewage Substances 0.000 claims description 12
- 230000018044 dehydration Effects 0.000 claims description 11
- 238000006297 dehydration reaction Methods 0.000 claims description 11
- 229920001084 poly(chloroprene) Polymers 0.000 claims description 11
- 229920003048 styrene butadiene rubber Polymers 0.000 claims description 11
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 claims description 9
- 239000007822 coupling agent Substances 0.000 claims description 8
- 238000011049 filling Methods 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 8
- 238000004321 preservation Methods 0.000 claims description 8
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 claims description 7
- XMQYIPNJVLNWOE-UHFFFAOYSA-N dioctyl hydrogen phosphite Chemical compound CCCCCCCCOP(O)OCCCCCCCC XMQYIPNJVLNWOE-UHFFFAOYSA-N 0.000 claims description 7
- 238000005485 electric heating Methods 0.000 claims description 7
- 238000006011 modification reaction Methods 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 6
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 6
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 claims description 6
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 5
- 229920002943 EPDM rubber Polymers 0.000 claims description 5
- 244000043261 Hevea brasiliensis Species 0.000 claims description 5
- 238000000498 ball milling Methods 0.000 claims description 5
- 229920003052 natural elastomer Polymers 0.000 claims description 5
- 229920001194 natural rubber Polymers 0.000 claims description 5
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 4
- 239000006185 dispersion Substances 0.000 claims description 4
- 150000002148 esters Chemical class 0.000 claims description 4
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 claims description 3
- 229920000459 Nitrile rubber Polymers 0.000 claims description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 3
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 3
- 229910052593 corundum Inorganic materials 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 3
- 229910000037 hydrogen sulfide Inorganic materials 0.000 claims description 3
- 239000012535 impurity Substances 0.000 claims description 3
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 3
- 229910052717 sulfur Inorganic materials 0.000 claims description 3
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 3
- 229910001845 yogo sapphire Inorganic materials 0.000 claims description 3
- 238000010521 absorption reaction Methods 0.000 claims description 2
- 229910021529 ammonia Inorganic materials 0.000 claims description 2
- 239000001569 carbon dioxide Substances 0.000 claims description 2
- 229930195733 hydrocarbon Natural products 0.000 claims description 2
- 150000002430 hydrocarbons Chemical class 0.000 claims description 2
- 238000012856 packing Methods 0.000 claims description 2
- 238000005086 pumping Methods 0.000 claims description 2
- 239000008399 tap water Substances 0.000 claims description 2
- 235000020679 tap water Nutrition 0.000 claims description 2
- 150000004645 aluminates Chemical class 0.000 abstract description 6
- 239000011248 coating agent Substances 0.000 abstract description 6
- 238000000576 coating method Methods 0.000 abstract description 6
- 239000010419 fine particle Substances 0.000 abstract description 5
- 239000005416 organic matter Substances 0.000 abstract description 4
- 238000000227 grinding Methods 0.000 abstract description 3
- 239000002244 precipitate Substances 0.000 abstract description 2
- 239000002131 composite material Substances 0.000 description 30
- 238000002156 mixing Methods 0.000 description 12
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 10
- 239000013049 sediment Substances 0.000 description 9
- 238000004073 vulcanization Methods 0.000 description 9
- 239000006229 carbon black Substances 0.000 description 8
- 238000012986 modification Methods 0.000 description 8
- 230000004048 modification Effects 0.000 description 8
- 239000003795 chemical substances by application Substances 0.000 description 7
- 238000012360 testing method Methods 0.000 description 7
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 6
- 230000003712 anti-aging effect Effects 0.000 description 6
- 239000002994 raw material Substances 0.000 description 6
- 235000021355 Stearic acid Nutrition 0.000 description 5
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 5
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 5
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 5
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 description 5
- 230000003014 reinforcing effect Effects 0.000 description 5
- 239000008117 stearic acid Substances 0.000 description 5
- 239000011787 zinc oxide Substances 0.000 description 5
- NKJOXAZJBOMXID-UHFFFAOYSA-N 1,1'-Oxybisoctane Chemical group CCCCCCCCOCCCCCCCC NKJOXAZJBOMXID-UHFFFAOYSA-N 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 4
- 239000005977 Ethylene Substances 0.000 description 4
- 239000010692 aromatic oil Substances 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 4
- 238000007865 diluting Methods 0.000 description 4
- 239000011159 matrix material Substances 0.000 description 4
- 239000003921 oil Substances 0.000 description 4
- 238000000889 atomisation Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 3
- 239000000292 calcium oxide Substances 0.000 description 3
- 235000012255 calcium oxide Nutrition 0.000 description 3
- 239000011362 coarse particle Substances 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 239000000395 magnesium oxide Substances 0.000 description 3
- 235000012245 magnesium oxide Nutrition 0.000 description 3
- 238000005507 spraying Methods 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- YXIWHUQXZSMYRE-UHFFFAOYSA-N 1,3-benzothiazole-2-thiol Chemical compound C1=CC=C2SC(S)=NC2=C1 YXIWHUQXZSMYRE-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 2
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 description 2
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 235000010755 mineral Nutrition 0.000 description 2
- 239000003607 modifier Substances 0.000 description 2
- 239000010813 municipal solid waste Substances 0.000 description 2
- DEQZTKGFXNUBJL-UHFFFAOYSA-N n-(1,3-benzothiazol-2-ylsulfanyl)cyclohexanamine Chemical compound C1CCCCC1NSC1=NC2=CC=CC=C2S1 DEQZTKGFXNUBJL-UHFFFAOYSA-N 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000006235 reinforcing carbon black Substances 0.000 description 2
- YGSDEFSMJLZEOE-UHFFFAOYSA-N salicylic acid Chemical compound OC(=O)C1=CC=CC=C1O YGSDEFSMJLZEOE-UHFFFAOYSA-N 0.000 description 2
- 238000007873 sieving Methods 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 239000002910 solid waste Substances 0.000 description 2
- 239000005995 Aluminium silicate Substances 0.000 description 1
- OTMSDBZUPAUEDD-UHFFFAOYSA-N Ethane Chemical compound CC OTMSDBZUPAUEDD-UHFFFAOYSA-N 0.000 description 1
- KKCBUQHMOMHUOY-UHFFFAOYSA-N Na2O Inorganic materials [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 241000700605 Viruses Species 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 235000012211 aluminium silicate Nutrition 0.000 description 1
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 1
- 239000012298 atmosphere Substances 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
- 238000005119 centrifugation Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000002361 compost Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 230000029087 digestion Effects 0.000 description 1
- 239000011790 ferrous sulphate Substances 0.000 description 1
- 235000003891 ferrous sulphate Nutrition 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000000875 high-speed ball milling Methods 0.000 description 1
- 239000003864 humus Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 230000003301 hydrolyzing effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000010954 inorganic particle Substances 0.000 description 1
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 description 1
- 229910000359 iron(II) sulfate Inorganic materials 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 229910052943 magnesium sulfate Inorganic materials 0.000 description 1
- 235000019341 magnesium sulphate Nutrition 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- FJKROLUGYXJWQN-UHFFFAOYSA-N papa-hydroxy-benzoic acid Natural products OC(=O)C1=CC=C(O)C=C1 FJKROLUGYXJWQN-UHFFFAOYSA-N 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- 244000052769 pathogen Species 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000012763 reinforcing filler Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 229960004889 salicylic acid Drugs 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 230000007847 structural defect Effects 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- 238000001238 wet grinding Methods 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
- C02F11/127—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering by centrifugation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/13—Treatment of sludge; Devices therefor by de-watering, drying or thickening by heating
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/06—Sulfur
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/34—Silicon-containing compounds
- C08K3/36—Silica
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K9/00—Use of pretreated ingredients
- C08K9/10—Encapsulated ingredients
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2206—Oxides; Hydroxides of metals of calcium, strontium or barium
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2217—Oxides; Hydroxides of metals of magnesium
- C08K2003/222—Magnesia, i.e. magnesium oxide
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2227—Oxides; Hydroxides of metals of aluminium
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2265—Oxides; Hydroxides of metals of iron
- C08K2003/2272—Ferric oxide (Fe2O3)
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention relates to a preparation method of a sludge reinforced high-elasticity rubber filler. Separating out coarse solid particles from sludge slurry by using a low-rotation-speed horizontal spiral discharge sedimentation centrifuge; (2) solid-liquid separation is carried out on the residual fine-grain sludge slurry through a high-speed centrifuge; (3) coating and modifying the surface of the separated viscous precipitate sludge by titanate and aluminate; (4) modified sludge is atomized by airflow, is subjected to flash evaporation to remove water, is subjected to counter-current drying by a rotary kiln, and removes substances capable of decomposing gas molecules in the sludge in the heating and drying process; (5) and grinding, dispersing and packaging the dry sludge to obtain the modified sludge reinforced rubber filler. The filler obtained by the invention has the characteristics of uniform particle size, fine particles, high organic matter content, rich shape and strong bonding capacity with a rubber interface, and can obviously improve the elongation at break and the mechanical property of rubber.
Description
Technical Field
The invention relates to a method for preparing a high-elasticity rubber filler by using municipal sludge of a sewage treatment plant as a raw material, belonging to the field of comprehensive utilization of solid waste and preparation of novel composite materials.
Background
Along with the development of science and technology and the acceleration of urbanization pace in China, the urban scale is rapidly expanded, and the population density is improved. The demand and facilities for municipal sewage treatment are increasing, and the sludge yield is increasing year by year. Because the sludge has high organic matter content, is easy to decay and stink, has fine particles, light density and colloidal paste, and is extremely difficult to dehydrate, the water content of the concentrated sludge produced by a sewage plant is as high as more than 80 percent; the sludge contains a large amount of organic matters, bacteria, viruses and other microorganisms, inorganic particles, colloidal particles and the like, and the composition is extremely complex, so that a plurality of problems are brought to harmless disposal and utilization. However, long-term stacking of a large amount of sludge not only occupies land, but also causes pollution to the atmosphere, soil and water environment. Therefore, a stabilizing treatment technique is commonly used to degrade organic substances in the sludge, reduce the water content of the sludge, kill bacteria, pathogens, etc. in the sludge, and eliminate odor, etc. At present, the main method of sludge treatment is harmless landfill, which not only needs landfill facilities, but also occupies land and has the risk of leakage of polluted liquid. Therefore, the stabilization method becomes the main development direction, including compost utilization, anaerobic digestion, drying, combustion utilization and the like, and is also the key for effective utilization of sludge resource.
Ammonia nitrogen, humus and mineral substances in the sludge enable the sludge to have the function of soil improvement or mineral fertilizer; a large amount of organic matters in the waste water can be combusted to release a large amount of heat to be used as fuel for garbage power generation, but the water content is too high, the utilization efficiency of the heat energy is low, a large amount of residues which are difficult to effectively utilize are produced, and only reduction treatment can be realized.
The prior researches on a preparation method for preparing rubber filler with a rubber reinforcing function by using municipal sludge and river dredging sludge through sorting and surface treatment are less, for example, ZL.200610128338.0 proposes that oily sludge is crushed by adopting a wet or dry crushing process; separating the crushed powder, and removing particles with the particle size of more than 200 meshes; then, carrying out wet grinding to ensure that the particle size of the powder particles reaches D50 to be less than or equal to 3.0 mu m and D90 to be less than or equal to 6 mu m; dehydrating the ground powder slurry to obtain a slurry with a water content of less than 40%; then, the mud cake is scattered and dried to ensure that the water content is less than 0.4 percent; sieving with sieving equipment to obtain powder below 200 mesh, and obtaining the oil-containing filler with high application value. CN107915865 discloses a method for drying and crushing river sludge to prepare sludge dry powder, adding kaolin into the sludge dry powder for primary ball milling and mixing, and adding an organic silicon modifier into the above mixed components for secondary ball milling and modifying to obtain composite powder. CN101914233 discloses a method for preparing a rubber filler product by mixing and stirring oil-containing sludge powder, coal gangue powder, garbage ash powder, quick lime powder, calcium sulfate, chlorinated paraffin, magnesium oxide, ferrous sulfate, magnesium sulfate, a homogenizing agent A-78, salicylic acid, an anti-aging agent ND-50 and the like serving as raw materials by a double-shaft blade stirrer. And CN101463143 discloses a method for preparing powdered oil field sludge rubber filler with particle size less than 200 meshes and water content less than 0.5% by using oil field sludge as raw material. Although the above patent documents propose filling of rubber with sludge, there is no support for effective techniques and processes for obtaining high-quality powder having a rubber reinforcing function and a uniform particle diameter.
Disclosure of Invention
The invention aims to provide a preparation method of a sludge reinforced high-elasticity rubber filler aiming at the defects in the prior art. Separating out coarse solid particles from sludge slurry by using a low-rotation-speed horizontal spiral discharge sedimentation centrifuge; (2) solid-liquid separation is carried out on the residual fine-grain sludge slurry through a high-speed centrifuge; (3) coating and modifying the surface of the separated viscous precipitate sludge by titanate and aluminate; (4) modified sludge is atomized by airflow, is subjected to flash evaporation to remove water, is subjected to counter-current drying by a rotary kiln, and removes substances capable of decomposing gas molecules in the sludge in the heating and drying process; (5) and grinding, dispersing and packaging the dry sludge to obtain the modified sludge reinforced rubber filler. The filler obtained by the invention has the characteristics of uniform particle size, fine particles, high organic matter content, rich shape and strong bonding capacity with a rubber interface, and can obviously improve the elongation at break and the mechanical property of rubber.
The technical scheme of the invention is as follows:
a preparation method of a sludge reinforced high-elasticity rubber filler comprises the following steps:
(1) after the concentrated mixed sludge produced by a sewage treatment plant is adjusted into slurry with the concentration of 6-15% by tap water, the slurry is introduced into a low-speed horizontal spiral discharge sedimentation centrifuge with the rotating speed of 500-1000 rpm; respectively obtaining sludge slurry and solid particles; removing solid particles with the particle size of more than 0.010 mm;
the water content of the concentrated mixed sludge produced by the sewage treatment plant is 50-85%; after being dried at 105 ℃, the chemical composition range (%) of the dry basis comprises: SiO 2210-55、Fe2O32-50、P2O52-8、CaO 3-30、MgO 1-20、Al2O35-35、K2O 0.1-5、Na2O 0.1-5、TiO20.1-5 and S0.1-5.0, and the balance of organic matters and trace impurities.
(2) Introducing the sludge slurry obtained in the previous step into a high-speed centrifuge with the rotating speed of 1500-3000 rpm for dehydration to respectively obtain concentrated sludge slurry and clear liquid; the clear liquid is disinfected and discharged after reaching the standard.
(3) Pumping the thick sludge slurry to an electric heating heat preservation stirring barrel with the rotating speed of 200-600 rpm, adding an ester modifier diluted by isopropanol, controlling the temperature of the sludge slurry to be 25-75 ℃ and keeping the temperature in the stirring barrel for 30-180 min to obtain surface modified sludge slurry, and dehydrating the surface modified sludge slurry by a high-speed centrifuge to obtain dehydrated modified sludge slurry;
the ester coupling agent in the above (3) is: one of isopropyl tristearate titanate, tetraisopropyl di (dioctyl phosphite) titanate, dioctyloxy pyrophosphate ethylene titanate, distearoyl isopropyl aluminate or di (triethanolamine) diisopropyl titanate, wherein the addition amount of the one is 0.5 to 5.0 percent of the solid content of the sludge; the volume of the isopropanol is 3-10 times of that of the coupling agent;
(4) dehydrating the modified sludge slurry in the step (3) by a high-speed centrifuge with the rotating speed of 5000rpm, and removing water separated out in the modification reaction process after solid-liquid separation to obtain dehydrated modified sludge slurry;
(5) and (3) atomizing the dehydrated modified sludge slurry by airflow, performing flash evaporation to remove water, performing countercurrent drying on a rotary kiln to obtain dried modified sludge with the water content of less than 0.5%, and performing ball milling dispersion on the dried modified sludge to obtain powder, and packaging the powder by using a water-proof sealing bag for later use to obtain the superfine modified sludge reinforced rubber filler.
The (5) airflow atomization of the dehydrated surface modified sludge, and the flash evaporation dehydration refers to that the dehydrated modified sludge utilizes gas pressure as follows: 0.4 to 0.8MPa, and a flow rate of 0.3 to 1.5m3A/min conical flash evaporation dryer, which is used for flash evaporation for 3-8 min in hot air with the air inlet temperature of 105-110 ℃ to rapidly dehydrate sludge;
and (5) performing countercurrent drying on the rotary kiln, wherein an industrial rotary kiln with the air inlet temperature of 130-150 ℃, the air outlet temperature of 105 ℃, the cylinder diameter of 500mm, the rotating speed of 4rpm and the length of 6m is adopted for heating for 3h, so that the gas-producing material in the sludge is fully decomposed and dried. The whole evaporation and drying process adopts a counter-current heating process that the movement direction of the sludge powder is opposite to the flow direction of hot air flow.
And (5) removing water by flash evaporation, decomposing in a rotary kiln, and discharging water vapor discharged in the drying process and other decomposed small molecular weight gases such as ammonia gas, nitrogen oxides, hydrogen sulfide, carbon dioxide, methane and other hydrocarbons, purifying by an absorption tower and discharging.
The sludge-reinforced high-elasticity rubber filler prepared by the method is applied to filling of styrene butadiene rubber, chloroprene rubber, ethylene propylene diene monomer rubber, nitrile rubber, natural rubber and the like, and the filling amount is 0.3-0.8 time of the weight of pure rubber.
The invention has the substantive characteristics that:
(1) separating out coarse solid particles from the sludge slurry by using a low-speed horizontal spiral discharge sedimentation centrifuge; (2) titanate and aluminate are selected to carry out coating modification on the surface of the sludge instead of chemical bonding modification, and a foundation is laid for forming a bonding interface mainly comprising physical winding between the sludge filler and the surface of the rubber matrix. (3) The dewatered modified sludge slurry is subjected to airflow atomization and flash evaporation to remove water, and then is reversely dried by a rotary kiln, so that substances capable of decomposing gas molecules are removed in the drying and heating process, and the quality of the reinforced composite rubber is guaranteed.
Wherein, (1) a 500-1000 rpm horizontal spiral discharge sedimentation centrifugal separator is used for separating out coarser solid particle materials in the sludge to remove; (2) sludge surface modification: coating and modifying the surface of the sludge by utilizing titanate and aluminate; (3) airflow atomization of dehydrated modified sludge slurry, flash evaporation for dewatering, and reverse drying in a rotary kiln (namely, hot air with the air inlet temperature of 105-110 ℃ rapidly dehydrates sprayed sludge particles, then the sludge particles enter the heating process with the air inlet temperature of 130-150 ℃ and the outlet temperature of 105 ℃ and are dried in the reverse rotary kiln for 3 hours), so that substance molecules capable of decomposing gas in the sludge are fully decomposed and removed, and the mechanical property, the elongation at break and the service performance are prevented from being influenced by bubbles in the vulcanization process of the composite rubber;
the invention has the beneficial effects that:
the invention uses the mixed sludge left after the sewage treatment of the urban sewage treatment plant as the raw material, after sorting and removing larger particles, the solid-liquid separation is carried out, the thick sludge slurry is subjected to surface modification, evaporation and dehydration, decomposition, drying, degassing and ball milling dispersion, and the modified sludge powder with uniform particle size, fine particles, high organic matter content and strong binding force with a rubber interface is obtained.
When the filling amount of the modified sludge is 40-80% of the mass of the pure rubber matrix, a satisfactory reinforced composite rubber sample can be obtained. For example, when the filling amount of the modified sludge is 70% of the mass of the pure chloroprene rubber, the tensile strength of the obtained sludge reinforced composite chloroprene rubber can reach 14.62MPa, and the elongation at break reaches 1726.7%. Under the same formula condition, the tensile strength of the composite chloroprene rubber reinforced by carbon black N330 filled with 70 percent of pure chloroprene rubber is 13.96MPa, and the elongation at break is 316.3 percent. The mechanical properties of the modified sludge reinforced composite rubber are higher than those of reinforced carbon black N330 reinforced chloroprene rubber, and particularly, the elongation at break of the sludge reinforced composite rubber is improved by about 5.5 times compared with that of the carbon black reinforced composite rubber. The composite rubber filled with the superfine modified sludge reinforcing filler has the mechanical properties meeting the industrial utilization indexes of different industries and has elasticity far higher than that of the conventional composite rubber.
The filler greatly reduces the preparation cost of the composite rubber, turns the harmful into the beneficial and changes the waste into the valuable; for example, the price of the reinforcing carbon black N330 currently exceeds 8000 yuan/ton, and for each ton of municipal sludge, the state needs to give financial subsidies of 360 yuan/ton and 450 yuan/ton to the sludge treatment enterprises. Therefore, the filler prepared by taking the municipal sludge as the raw material can save carbon black and increase economic and social benefits. The preparation cost is about 600 yuan/ton to 1000 yuan/ton, the reinforcing effect on different types of rubber is close to the tensile strength of the composite rubber reinforced by the reinforcing carbon black, but the elongation at break is greatly improved. Therefore, the method is beneficial to saving the usage amount of the carbon black, promoting carbon emission reduction and carbon peak reaching, and improving the resource utilization rate and the additional value of the solid waste.
Drawings
FIG. 1 is a flow chart of a preparation process of sludge purification, modification and reinforcement composite rubber;
FIG. 2 is a particle size distribution curve of raw sludge and a particle size distribution curve of sludge obtained after coarse particles are removed by a low-speed horizontal spiral discharge sedimentation centrifuge.
FIG. 3 micro-morphology of raw sludge
FIG. 4 is a stretch-broken surface of the isopropyl tristearate titanate-modified sludge-reinforced composite styrene-butadiene rubber obtained in example 1
Detailed Description
The municipal sludge utilized by the invention is a certain sewage treatment company Limited in the economic development area of Tianjin Tangzhi.
The concentrated mixed sludge produced by the sewage treatment plant comprises the following components: 80.2 percent of water; after drying at 105 ℃, the chemical components (%) are tested as follows: SiO 2225.7、Fe2O329.5、P2O54.55, CaO 8.28, MgO 1.36 and Al2O314.0, a small amount of K2O 1.11、Na2O0.94 and TiO20.77 and 0.35 percent of S, and the balance of various organic matters 12.3 containing carbon, hydrogen, oxygen and nitrogen, and impurities. The total carbon content of the sample was 29.81% and the loss on ignition was 53.88%.
The sludge raw material is subjected to size mixing, large solid particles in the sludge slurry are removed through centrifugation, and the superfine modified sludge reinforced rubber filler is obtained for later use through dehydration, sludge surface modification, flash evaporation dehydration, countercurrent drying and grinding dispersion.
Preparing modified sludge reinforced rubber, scouring pure rubber by using a traditional open mill to uniformly mix the rubber with components such as filler, auxiliary agent and the like, vulcanizing by a flat vulcanizing machine, cutting pieces by using standard dies of different types, testing the tensile strength and the stress at definite elongation of the composite rubber by using a full-automatic numerical control universal mechanical testing machine and according to the related national standard GB/T528 plus-material 2009, wherein a test sample is a national standard dumbbell-shaped I type (the width of a narrow parallel part is about 6mm, the thickness is 2.0 +/-0.2 mm), and the thickness is 2.5 +/-0.2 mm. The rubber sample is vulcanized by a flat vulcanizing machine according to the temperature and the positive vulcanization time T90 by using a full-automatic rotor-free vulcanizing instrument according to the vulcanization characteristic curve of the rubber sample measured by the GB/T16584 and 1996 standard.
Example 1
Adding water into the sludge to prepare slurry with the concentration of 6%, introducing the slurry into a horizontal spiral discharge sedimentation centrifuge with the rotation speed of 500rpm for separation, and removing solid particle sediments with the particle size of more than 0.010mm discharged from a residue discharge port; sludge slurry with the particle size of less than 5 microns is obtained from a liquid outlet and is directly sent into a high-speed centrifuge with the rotating speed of 3000rpm for sedimentation and dehydration, and clear liquid is disinfected and discharged after reaching the standard; the discharged concentrated sludge slurry is led into an electric heating heat-preservation stirring barrel with the rotating speed of 200rpm, and isopropyl with the solid content of 3 percent of the concentrated sludge is addedThe tristearate titanate is diluted into modified liquid by isopropanol with the volume 5 times that of the isopropyltristearate titanate before use, the modified sludge is obtained after stirring for 180min under the heat preservation of 25 ℃, the modified sludge is sent to a centrifuge with the rotating speed of 5000rpm for solid-liquid separation, and water separated out in the modification reaction process is removed, so as to obtain the dehydrated modified sludge. The gas pressure of the dehydrated modified sludge is as follows: 0.6MPa, flow 1.0m3And/min spraying into a conical flash evaporation dryer, rapidly dehydrating hot air with the temperature of 105 ℃ at an air inlet, feeding into an industrial rotary kiln with the temperature of 150 ℃ at the air inlet, the temperature of 105 ℃ at an air outlet, the diameter of a cylinder body of 500mm, the rotating speed of 4rpm and the length of 6m, and heating for 3 hours to decompose and dry sludge. Drying to obtain dried modified sludge with water content less than 0.5%, dispersing for 30min by a ball mill with the rotation speed of 1000rpm under the condition that the material-ball ratio is 1:3, packaging the obtained powder by a waterproof sealing bag for later use, and obtaining the ultrafine isopropyl tristearate titanate modified sludge powder reinforced rubber filler with the particle size less than 5 microns.
100g of styrene butadiene rubber open roll is sequentially added with the mass (g): 1.5g of anti-aging agent 4010NA, 50g of isopropyl tristearate titanate modified ultrafine sludge powder, 2.0g of zinc oxide, 3.0g of stearic acid and 1.5g of accelerator CZ, after completely eating the powder, adding 10ml of aromatic oil and the rest 20g of isopropyl tristearate titanate modified ultrafine sludge powder reinforcing rubber filler, uniformly mixing, packaging, adding 2.0g of sulfur powder, continuously mixing, wrapping for 15 times in a triangular bag, passing through the triangular bag, cutting into pieces, standing the sample overnight, then vulcanizing by a flat plate vulcanizing machine according to the normal vulcanization temperature and time t90, cutting into pieces, and testing the mechanical properties of the ultrafine modified sludge powder reinforced composite styrene butadiene rubber. The results are shown in Table 1, the particle size distribution of the sludge and the sludge after removal of larger particles is shown in FIG. 2, and the microscopic morphology of the sludge is shown in FIG. 3.
From the results in table 1, it can be seen that when the filling amount of the ultrafine isopropyl tristearate titanate modified sludge is 70% of the pure styrene butadiene rubber, the tensile strength of the obtained sludge reinforced composite chloroprene rubber can reach 14.62MPa, and the elongation at break reaches 1726.7%. Under the same formula condition, the tensile strength of the reinforced composite chloroprene rubber filled with 70% pure styrene-butadiene rubber weight carbon black N330 is 13.96MPa, and the elongation at break is 316.3%. The performances of the superfine modified sludge reinforced styrene butadiene rubber are higher than those of the reinforced carbon black N330 reinforced styrene butadiene rubber, particularly the elongation at break of the sludge reinforced composite rubber is improved by about 5.5 times than that of the carbon black reinforced composite rubber, and the superfine modified sludge reinforced styrene butadiene rubber shows excellent elasticity and application prospect. As can be seen from the particle size distribution curves of the sludge and the sludge from which the larger particles are removed in FIG. 2, the average particle size D50 and the D90 of the particles with the volume fraction of 90% are respectively 15.80 μm and 25.65 μm, which indicates that the sludge contains solid particles with relatively coarse particle sizes, and after the coarse particles are removed by separation with a horizontal spiral discharge sedimentation centrifuge, the particle sizes D50 and D90 of the residual sludge particles in the pulp are respectively 1.88 μm and 4.90 μm, so that sludge slurry with fine particle sizes is obtained by separation with a centrifuge, and the sludge slurry is dehydrated, surface modified, dried and dispersed by high-speed ball milling centrifuge, and the ultrafine modified sludge powder reinforced rubber filler is obtained. As can be seen from the microstructure of the sludge shown in fig. 3, the original sludge contains a lot of micro-fine sludge particles, which are mainly present in an agglomerated form, partially wrap the surface of larger particles, and also contains a few larger particles with clear outlines (in white dotted lines). Fig. 4 is a stretch-broken view of isopropyl tristearate titanate modified sludge reinforced composite styrene-butadiene rubber, showing that sludge particles are uniformly dispersed in the rubber matrix, but structural defects (in white dotted lines) appear around a small number of larger particles with a diameter of about 2 μm, while the surfaces of most particles have no clear outline, indicating that the rubber forms a better interface connection with the particle surfaces.
Example 2
The sludge is adjusted into slurry with the concentration of 10 percent, and the slurry is guided into a horizontal spiral discharge sedimentation centrifuge with the rotating speed of 1000rpm for separation, and then the sediment discharged from a sediment discharge port is discarded. Directly feeding the sludge slurry into a high-speed centrifuge with the rotating speed of 3000rpm for sedimentation and dehydration, introducing the discharged concentrated sludge slurry into an electric heating heat-preservation stirring barrel with the rotating speed of 600rpm, adding tetraisopropylbis (dioctyl phosphite) titanate with the solid content of the concentrated sludge of 5 percent, diluting the tetraisopropylbis (dioctyl phosphite) titanate with 10 times of the volume of the isopropyl alcohol before use into a modified solution, preserving the temperature at 75 ℃ and stirring for 30min to obtain modified sludge slurry, feeding the modified sludge slurry into the centrifuge with the rotating speed of 5000rpm for solid-liquid separation, removing water separated in the modification reaction process to obtain the de-modified sludge slurryWater modified sludge slurry. The gas pressure of the dehydrated modified sludge is as follows: 0.4MPa, flow 1.5m3And/min spraying into a conical flash evaporation dryer, rapidly dehydrating hot air with the temperature of 110 ℃ at an air inlet, sending into an industrial rotary kiln with the temperature of 130 ℃ at the air inlet, the temperature of 105 ℃ at an air outlet, the diameter of a cylinder body of 500mm, the rotating speed of 4rpm and the length of 6m, and heating for 3 hours to decompose and dry sludge. Drying to obtain dried modified sludge with water content less than 0.5%, dispersing for 30min by a ball mill with the rotation speed of 1000rpm under the condition that the material ball ratio is 1:3, packaging the obtained powder by a waterproof sealing bag for later use, and obtaining the superfine tetraisopropyl di (dioctyl phosphite) titanate modified sludge powder reinforced rubber filler.
100g of chloroprene rubber is rolled up and added with the following mass (g): 1.5 of an anti-aging agent RD, 20g of tetraisopropyl di (dioctyl phosphite) titanate superfine modified sludge powder, 1.5g of zinc oxide, 2g of stearic acid, 0.5g of an accelerator M and 1.0g of an accelerator TT, adding the rest 10g of tetraisopropyl di (dioctyl phosphite) titanate superfine modified sludge powder reinforced rubber filler after completely eating the powder, uniformly mixing and packaging, adding 1.5g of sulfur powder, continuously mixing, making a triangular bag for 15 times, thinly passing, cutting into pieces, standing overnight, vulcanizing by a flat plate vulcanizing machine according to the normal vulcanization temperature and time t90, cutting into pieces, and testing the mechanical properties of the superfine modified sludge powder reinforced chloroprene rubber, wherein the results are shown in Table 1.
Example 3
The sludge is adjusted into slurry with the concentration of 12 percent, and the slurry is guided into a horizontal spiral discharge sedimentation centrifuge with the rotating speed of 800rpm for separation, and then the sediment discharged from a sediment discharge port is discarded. Directly feeding the sludge slurry into a high-speed centrifuge with the rotating speed of 3000rpm for sedimentation and dehydration, introducing the discharged concentrated sludge slurry into an electric heating heat-preservation stirring barrel with the rotating speed of 400rpm, adding dioctyloxy pyrophosphato ethylene titanate with the solid content of the concentrated sludge of 0.5%, diluting isopropanol with the volume of 3 times that of the dioctyloxy pyrophosphato ethylene titanate before use into modified liquid, stirring for 60min at the temperature of 60 ℃ to obtain modified sludge slurry, feeding the modified sludge slurry into the centrifuge with the rotating speed of 5000rpm for solid-liquid separation, and removing water separated out in the modification reaction process to obtain the dehydrated modified sludge slurry. The gas pressure of the dehydrated modified sludge is as follows: 0.8MPa, flow 0.3m3And/min spraying into a conical flash evaporation dryer, rapidly dehydrating hot air with the temperature of 108 ℃ at an air inlet, sending into an industrial rotary kiln with the temperature of 140 ℃ at the air inlet, the temperature of 105 ℃ at an air outlet, the diameter of a cylinder body of 500mm, the rotating speed of 4rpm and the length of 6m, and heating for 3 hours to decompose and dry sludge. Drying to obtain dried modified sludge with the water content of less than 0.5%, dispersing for 30min by using a ball mill with the rotating speed of 1000rpm under the condition that the material-ball ratio is 1:3, and packaging the obtained powder by using a water-proof sealing bag for later use to obtain the superfine dioctyloxy pyrophosphate ethylene titanate modified sludge powder reinforced rubber filler.
100g of ethylene propylene diene monomer rubber open-roll ladle roller is sequentially added with the following components by mass: 1.5g of anti-aging agent 4010NA, 50g of dioctyloxy pyrophosphato ethylene titanate modified ultrafine sludge powder, 2.2g of zinc oxide, 3.0g of stearic acid and 1.5g of accelerator CZ, after completely eating the powder, adding 10ml of aromatic oil and the rest 30g of dioctyloxy pyrophosphato ethylene titanate modified ultrafine sludge powder to reinforce rubber filler powder, uniformly mixing and packaging, adding 1.5g of sulfur powder to continuously mix, wrapping for 15 times, thinly passing through, cutting into pieces, standing overnight, vulcanizing by a flat plate vulcanizing machine according to the normal vulcanization temperature and time t90, cutting into pieces, and testing the mechanical properties of the ultrafine modified sludge powder reinforced composite ethylene propylene diene monomer. The results are shown in Table 1.
Example 4
And (3) mixing the sludge into slurry with the solid content concentration of 7%, introducing the slurry into a horizontal spiral discharge sedimentation centrifuge with the rotation speed of 700rpm for separation, and then discarding the sediment discharged from a sediment discharge port. Directly feeding the sludge slurry into a high-speed centrifuge with the rotating speed of 3000rpm for sedimentation and dehydration, introducing the discharged concentrated sludge slurry into an electric heating heat-preservation stirring barrel with the rotating speed of 300rpm, adding distearoyl isopropyl aluminate with the solid content of the concentrated sludge being 3%, diluting isopropanol with the volume being 7 times that of the distearoyl isopropyl aluminate into a modified solution before use, stirring at the temperature of 50 ℃ for 90min to obtain modified sludge slurry, feeding the modified sludge slurry into the centrifuge with the rotating speed of 5000rpm for solid-liquid separation, and removing water separated out in the modification reaction process to obtain the dehydrated modified sludge slurry. The gas pressure of the dehydrated modified sludge is as follows: 0.6MPa, flow 0.8m3Min spray into conical flash dryer at inlet temperature of 106 deg.CAfter the hot air is rapidly dehydrated, the hot air is sent into an industrial rotary kiln with the inlet air temperature of 150 ℃, the outlet air temperature of 105 ℃, the cylinder diameter of 500mm, the rotating speed of 4rpm and the length of 6m to be heated for 3h for decomposing and drying the sludge. Drying to obtain dried modified sludge with water content less than 0.5%, dispersing for 30min by a ball mill with the rotation speed of 1000rpm under the condition that the material ball ratio is 1:3, and packaging the obtained powder by a waterproof sealing bag for later use to obtain the superfine distearoyl isopropyl aluminate modified sludge powder reinforced rubber filler.
100g of ethylene propylene diene monomer rubber open-roll ladle roller is sequentially added with the following components by mass: 1.2g of an anti-aging agent RD, 40g of distearoyl isopropyl aluminate modified ultrafine sludge powder, 2.5% of zinc oxide, 2.0% of stearic acid and 1.0% of a promoter CZ, after the powder is completely eaten, 5ml of aromatic oil and the rest 15g of distearoyl isopropyl aluminate modified ultrafine sludge powder reinforcing rubber filler are added, the mixture is uniformly mixed and packed, 1.5g of sulfur powder is added for continuous mixing, triangular packing is carried out for 15 times, the mixture is subjected to thin passing, cutting, standing overnight, vulcanization is carried out by a flat plate vulcanizing machine according to the normal vulcanization temperature and time t90, and the mechanical properties of the ultrafine modified sludge powder reinforced composite nitrile butadiene rubber are tested. The results are shown in Table 1.
Example 5
And (3) adjusting the sludge into slurry with the concentration of 15%, introducing the slurry into a horizontal spiral discharge sedimentation centrifuge with the rotating speed of 500rpm for separation, and then discarding the sediment discharged from a sediment discharge port. Directly feeding the sludge slurry into a high-speed centrifuge with the rotating speed of 3000rpm for sedimentation and dehydration, introducing the discharged concentrated sludge slurry into an electric heating heat-preservation stirring barrel with the rotating speed of 400rpm, adding di (triethanolamine) diisopropyl titanate with the solid content of the concentrated sludge of 2.0 percent, diluting with isopropanol with the volume of 6 times of that of the di (triethanolamine) diisopropyl titanate into a modified solution before use, stirring at 30 ℃ for 120min for modification to obtain modified sludge slurry, feeding the modified sludge slurry into the centrifuge with the rotating speed of 5000rpm for solid-liquid separation, and removing water separated out in the modification reaction process to obtain the dehydrated modified sludge slurry. The gas pressure of the dehydrated modified sludge is as follows: 0.6MPa, flow 1.0m3The spray-in conical flash evaporation dryer is used for rapidly dehydrating hot air with the temperature of 105 ℃ at an air inlet, then sending the hot air into the flash evaporation dryer with the temperature of 150 ℃ at the air inlet, the temperature of 105 ℃ at an air outlet, the diameter of a cylinder body of 500mm, the rotating speed of 4rpm and the length of the cylinder bodyAnd heating the industrial rotary kiln with the temperature of 6m for 3 hours to decompose and dry the sludge. Drying to obtain dried modified sludge with water content less than 0.5%, dispersing for 30min by a ball mill with the rotation speed of 1000rpm under the condition that the material-ball ratio is 1:3, and packaging the obtained powder by a water-proof sealing bag for later use to obtain the superfine di (triethanolamine) diisopropyl titanate modified sludge powder reinforced rubber filler.
100g of natural rubber is rolled, and pure natural rubber mass (g): 1.6g of anti-aging agent RD, 50g of di (triethanolamine) diisopropyl titanate modified superfine sludge powder, 2.0g of zinc oxide, 2.5g of stearic acid, 1.0g of accelerator M and 0.5g of accelerator TT, after completely eating the powder, adding 10ml of aromatic oil and the rest 20g of di (triethanolamine) diisopropyl titanate modified superfine sludge powder reinforced rubber filler, uniformly mixing and packaging, adding 1.5g of sulfur powder, continuously mixing, wrapping for 15 times in a triangular mode, thinly passing through, cutting into pieces, standing overnight, vulcanizing by a flat plate vulcanizing machine according to normal vulcanization temperature and time t90, cutting into pieces, and testing the mechanical properties of the superfine modified sludge powder reinforced composite natural rubber. The results are shown in Table 1.
TABLE 1
And municipal sludge can be utilized, and different types of industrial sludge, river dredging sludge and the like can be utilized, so that the sludge utilization field and the comprehensive utilization value are developed.
As can be seen from the above examples, the present invention provides a horizontal spiral discharge sedimentation centrifugal separator with a specific rotation speed to remove solid particles with larger particle size in sludge slurry in advance according to the composition characteristics of municipal sludge, combining the process method in conventional treatment and combining the requirements of reinforced composite rubber on filler particle morphology and surface performance, dehydrating the sludge slurry, hydrolyzing the surface coating modification by a coupling agent, atomizing the modified sludge into the feed inlet of a rotary kiln, removing water by countercurrent evaporation, and decomposing the modified sludge into small molecular compounds such as ammonia, methane, ethane, hydrogen sulfide and SO in the drying process2、NOxAnd CO2And the sludge components of the products are decomposed and removed, so that the phenomenon that a large number of gas molecules generated in the heating and vulcanizing process of the reinforced composite rubber filler form a large number of air holes in the composite rubber to influence the mechanical property and the service performance of the reinforced rubber is avoided. The coupling agent with specific chemical components is used for coating and modifying the surface of the sludge, so that a reticular winding structure mainly comprising physical winding is promoted to be formed between the combined interface of the modified sludge filler and the rubber matrix, and the high-elasticity composite rubber is prepared. The process can utilize municipal sludge as filler, and can also utilize industrial sludge of different types of sewage plants, desilting sludge of rivers, ditches and the like, thereby developing the utilization field and the comprehensive utilization value of the sludge.
The invention is not the best known technology.
Claims (7)
1. A preparation method of a sludge reinforced high-elasticity rubber filler is characterized by comprising the following steps:
(1) after the concentrated mixed sludge produced by a sewage treatment plant is adjusted into slurry with the concentration of 6-15% by tap water, the slurry is introduced into a low-speed horizontal spiral discharge sedimentation centrifuge with the rotating speed of 500-1000 rpm; respectively obtaining sludge slurry and solid particles; removing solid particles with the particle size of more than 0.010 mm;
the water content of the concentrated mixed sludge produced by the sewage treatment plant is 50-85%;
(2) introducing the sludge slurry obtained in the previous step into a high-speed centrifuge with the rotating speed of 1500-3000 rpm for dehydration to respectively obtain concentrated sludge slurry and clear liquid; the clear liquid is disinfected and discharged after reaching the standard;
(3) pumping the thick sludge slurry to an electric heating heat preservation stirring barrel with the rotating speed of 200-600 rpm, adding an ester coupling agent diluted by isopropanol, controlling the temperature of the sludge slurry to be 25-75 ℃ and keeping the temperature of the stirring barrel for 30-180 min to obtain surface modified sludge slurry, and dehydrating the surface modified sludge slurry by a high-speed centrifuge to obtain dehydrated modified sludge slurry;
the addition amount of the coupling agent is 0.5-5.0% of the solid content of the sludge; the volume of the isopropanol is 3-10 times of that of the coupling agent;
(4) dehydrating the modified sludge slurry in the step (3) by a high-speed centrifuge with the rotating speed of 5000rpm, and removing water separated out in the modification reaction process after solid-liquid separation to obtain dehydrated modified sludge slurry;
(5) and (3) atomizing the dehydrated modified slurry by airflow, performing flash evaporation to remove water, performing countercurrent drying on the slurry by a rotary kiln to obtain dried modified sludge with the water content of less than 0.5%, and performing ball milling dispersion on the dried modified sludge to obtain powder, and packaging the powder by a water-proof sealing bag for later use to obtain the superfine modified sludge reinforced rubber filler.
2. The method for preparing the sludge-reinforced highly elastic rubber filler according to claim 1, wherein the step (5) of air-atomizing the dehydrated surface-modified sludge and flash-evaporating to remove water means that the dehydrated surface-modified sludge is subjected to gas pressure of 0.4 to 0.8MPa and flow rate of 0.3 to 1.5m3And (3) a/min conical flash evaporation dryer flashes in hot air with the air inlet temperature of 105-110 ℃ for 3-8 min.
3. The method for preparing sludge-reinforced high-elasticity rubber filler according to claim 1, wherein the rotary kiln in the step (5) is subjected to countercurrent drying, and the industrial rotary kiln with the inlet air temperature of 130-150 ℃, the outlet air temperature of 105 ℃, the cylinder diameter of 500mm, the rotation speed of 4rpm and the length of 6m is heated for 3 hours, so that the gas-producing material in the sludge is fully decomposed and dried. The whole evaporation and drying process adopts a counter-current heating process that the movement direction of the sludge powder is opposite to the flow direction of hot air flow.
4. The method for preparing sludge-reinforced highly elastic rubber packing as recited in claim 1, wherein said step (5) comprises removing water by flash evaporation and decomposing water vapor discharged during the drying process in a rotary kiln, and discharging small molecular weight gases such as ammonia, nitrogen oxides, hydrogen sulfide, carbon dioxide, methane and other hydrocarbons after purifying in an absorption tower.
5. The method for preparing a sludge-reinforced highly elastic rubber filler according to claim 1, wherein in the step (1), the chemical composition range (%) of the concentrated mixed sludge dry basis comprises: SiO 2210-55、Fe2O32-50、P2O52-8、CaO3-30、MgO 1-20、Al2O35-35、K2O 0.1-5、Na2O0.1-5 and TiO20.1-5 percent of S, 0.1-5.0 percent of S, and the balance of organic matters and trace impurities.
6. The method according to claim 1, wherein the ester coupling agent in step (3) is isopropyl tristearate titanate, tetraisopropyl bis (dioctyl phosphite) titanate, dioctyloxy pyrophosphate ethylene titanate, distearoyl isopropyl aluminate or di (triethanolamine) diisopropyl titanate.
7. The use of the sludge-reinforced highly elastic rubber filler prepared by the method of claim 1, wherein the filler is used for filling styrene-butadiene rubber, chloroprene rubber, ethylene-propylene-diene rubber, nitrile rubber, natural rubber and the like, and the filling amount is 0.3-0.8 times of the weight of pure rubber.
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