CN114031253A - System and method for harmless recycling treatment of oily sludge - Google Patents
System and method for harmless recycling treatment of oily sludge Download PDFInfo
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- CN114031253A CN114031253A CN202111529684.0A CN202111529684A CN114031253A CN 114031253 A CN114031253 A CN 114031253A CN 202111529684 A CN202111529684 A CN 202111529684A CN 114031253 A CN114031253 A CN 114031253A
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- oil
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- oily sludge
- tank
- sludge
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- 239000010802 sludge Substances 0.000 title claims abstract description 202
- 238000000034 method Methods 0.000 title claims abstract description 64
- 238000004064 recycling Methods 0.000 title claims abstract description 10
- 238000000605 extraction Methods 0.000 claims abstract description 74
- 230000003647 oxidation Effects 0.000 claims abstract description 60
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 60
- 238000001035 drying Methods 0.000 claims abstract description 46
- 239000002904 solvent Substances 0.000 claims abstract description 46
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 28
- 239000003921 oil Substances 0.000 claims description 162
- 239000012071 phase Substances 0.000 claims description 100
- 239000007790 solid phase Substances 0.000 claims description 62
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 52
- 238000003756 stirring Methods 0.000 claims description 45
- 239000007800 oxidant agent Substances 0.000 claims description 40
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 22
- 239000010779 crude oil Substances 0.000 claims description 22
- 239000004094 surface-active agent Substances 0.000 claims description 22
- 230000003750 conditioning effect Effects 0.000 claims description 20
- 230000001590 oxidative effect Effects 0.000 claims description 18
- 239000007791 liquid phase Substances 0.000 claims description 17
- 239000002994 raw material Substances 0.000 claims description 16
- 238000000926 separation method Methods 0.000 claims description 14
- 239000004115 Sodium Silicate Substances 0.000 claims description 12
- 235000019795 sodium metasilicate Nutrition 0.000 claims description 12
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 12
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 12
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid Substances OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 11
- 239000012752 auxiliary agent Substances 0.000 claims description 10
- 238000005238 degreasing Methods 0.000 claims description 10
- 239000002270 dispersing agent Substances 0.000 claims description 10
- 239000012286 potassium permanganate Substances 0.000 claims description 10
- XJWSAJYUBXQQDR-UHFFFAOYSA-M dodecyltrimethylammonium bromide Chemical compound [Br-].CCCCCCCCCCCC[N+](C)(C)C XJWSAJYUBXQQDR-UHFFFAOYSA-M 0.000 claims description 8
- 238000007670 refining Methods 0.000 claims description 7
- 235000019832 sodium triphosphate Nutrition 0.000 claims description 7
- 239000007789 gas Substances 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 6
- 239000010865 sewage Substances 0.000 claims description 6
- 239000007787 solid Substances 0.000 claims description 6
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 5
- 238000005188 flotation Methods 0.000 claims description 5
- 229910017604 nitric acid Inorganic materials 0.000 claims description 5
- GCLGEJMYGQKIIW-UHFFFAOYSA-H sodium hexametaphosphate Chemical compound [Na]OP1(=O)OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])O1 GCLGEJMYGQKIIW-UHFFFAOYSA-H 0.000 claims description 5
- 235000019982 sodium hexametaphosphate Nutrition 0.000 claims description 5
- 239000001577 tetrasodium phosphonato phosphate Substances 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims description 4
- 239000011259 mixed solution Substances 0.000 claims description 4
- 238000005191 phase separation Methods 0.000 claims description 4
- CEYYIKYYFSTQRU-UHFFFAOYSA-M trimethyl(tetradecyl)azanium;chloride Chemical compound [Cl-].CCCCCCCCCCCCCC[N+](C)(C)C CEYYIKYYFSTQRU-UHFFFAOYSA-M 0.000 claims description 4
- -1 ammonium halide Chemical class 0.000 claims description 3
- YRIUSKIDOIARQF-UHFFFAOYSA-N dodecyl benzenesulfonate Chemical compound CCCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 YRIUSKIDOIARQF-UHFFFAOYSA-N 0.000 claims description 3
- MOTZDAYCYVMXPC-UHFFFAOYSA-N dodecyl hydrogen sulfate Chemical compound CCCCCCCCCCCCOS(O)(=O)=O MOTZDAYCYVMXPC-UHFFFAOYSA-N 0.000 claims description 3
- 229940043264 dodecyl sulfate Drugs 0.000 claims description 3
- 229940071161 dodecylbenzenesulfonate Drugs 0.000 claims description 3
- WZXYXXWJPMLRGG-UHFFFAOYSA-N hexadecyl benzenesulfonate Chemical compound CCCCCCCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 WZXYXXWJPMLRGG-UHFFFAOYSA-N 0.000 claims description 3
- LPTIRUACFKQDHZ-UHFFFAOYSA-N hexadecyl sulfate;hydron Chemical compound CCCCCCCCCCCCCCCCOS(O)(=O)=O LPTIRUACFKQDHZ-UHFFFAOYSA-N 0.000 claims description 3
- 229910044991 metal oxide Inorganic materials 0.000 claims description 3
- 150000004706 metal oxides Chemical class 0.000 claims description 3
- 150000004028 organic sulfates Chemical class 0.000 claims description 3
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 2
- 238000000746 purification Methods 0.000 claims description 2
- 238000006243 chemical reaction Methods 0.000 claims 1
- 238000004821 distillation Methods 0.000 claims 1
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 claims 1
- 230000008901 benefit Effects 0.000 abstract description 4
- 239000003337 fertilizer Substances 0.000 abstract description 3
- 239000004566 building material Substances 0.000 abstract description 2
- 229910021577 Iron(II) chloride Inorganic materials 0.000 description 5
- 238000004939 coking Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 5
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 5
- 238000004140 cleaning Methods 0.000 description 4
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical compound [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 description 3
- 238000011033 desalting Methods 0.000 description 3
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Inorganic materials O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 238000000638 solvent extraction Methods 0.000 description 3
- 239000002912 waste gas Substances 0.000 description 3
- YFDKVXNMRLLVSL-UHFFFAOYSA-N 2-dodecylbenzenesulfonic acid;sodium Chemical compound [Na].CCCCCCCCCCCCC1=CC=CC=C1S(O)(=O)=O YFDKVXNMRLLVSL-UHFFFAOYSA-N 0.000 description 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical class [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 2
- 238000005273 aeration Methods 0.000 description 2
- 238000013019 agitation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- NMCUIPGRVMDVDB-UHFFFAOYSA-L iron dichloride Chemical compound Cl[Fe]Cl NMCUIPGRVMDVDB-UHFFFAOYSA-L 0.000 description 2
- 229910000359 iron(II) sulfate Inorganic materials 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- GGHPAKFFUZUEKL-UHFFFAOYSA-M sodium;hexadecyl sulfate Chemical compound [Na+].CCCCCCCCCCCCCCCCOS([O-])(=O)=O GGHPAKFFUZUEKL-UHFFFAOYSA-M 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- RCEAADKTGXTDOA-UHFFFAOYSA-N OS(O)(=O)=O.CCCCCCCCCCCC[Na] Chemical compound OS(O)(=O)=O.CCCCCCCCCCCC[Na] RCEAADKTGXTDOA-UHFFFAOYSA-N 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 238000010170 biological method Methods 0.000 description 1
- 238000009933 burial Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- SZVJSHCCFOBDDC-UHFFFAOYSA-N ferrosoferric oxide Chemical compound O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000002920 hazardous waste Substances 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- JRKICGRDRMAZLK-UHFFFAOYSA-L peroxydisulfate Chemical compound [O-]S(=O)(=O)OOS([O-])(=O)=O JRKICGRDRMAZLK-UHFFFAOYSA-L 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000011112 process operation Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- HEBRGEBJCIKEKX-UHFFFAOYSA-M sodium;2-hexadecylbenzenesulfonate Chemical compound [Na+].CCCCCCCCCCCCCCCCC1=CC=CC=C1S([O-])(=O)=O HEBRGEBJCIKEKX-UHFFFAOYSA-M 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 238000004227 thermal cracking Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Images
Classifications
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- 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
- C02F11/06—Treatment of sludge; Devices therefor by oxidation
-
- 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
- C02F1/24—Treatment of water, waste water, or sewage by flotation
-
- 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
- C02F1/40—Devices for separating or removing fatty or oily substances or similar floating material
-
- 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
- C02F11/002—Sludge treatment using liquids immiscible with water
-
- 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
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G1/00—Production of liquid hydrocarbon mixtures from oil-shale, oil-sand, or non-melting solid carbonaceous or similar materials, e.g. wood, coal
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G1/00—Production of liquid hydrocarbon mixtures from oil-shale, oil-sand, or non-melting solid carbonaceous or similar materials, e.g. wood, coal
- C10G1/002—Production of liquid hydrocarbon mixtures from oil-shale, oil-sand, or non-melting solid carbonaceous or similar materials, e.g. wood, coal in combination with oil conversion- or refining processes
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G53/00—Treatment of hydrocarbon oils, in the absence of hydrogen, by two or more refining processes
- C10G53/02—Treatment of hydrocarbon oils, in the absence of hydrogen, by two or more refining processes plural serial stages only
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G53/00—Treatment of hydrocarbon oils, in the absence of hydrogen, by two or more refining processes
- C10G53/02—Treatment of hydrocarbon oils, in the absence of hydrogen, by two or more refining processes plural serial stages only
- C10G53/14—Treatment of hydrocarbon oils, in the absence of hydrogen, by two or more refining processes plural serial stages only including at least one oxidation step
-
- 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
- C02F2103/10—Nature of the water, waste water, sewage or sludge to be treated from quarries or from mining activities
-
- 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
- C02F2103/34—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32
- C02F2103/36—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32 from the manufacture of organic compounds
- C02F2103/365—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32 from the manufacture of organic compounds from petrochemical industry (e.g. refineries)
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/06—Sludge reduction, e.g. by lysis
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G2300/00—Aspects relating to hydrocarbon processing covered by groups C10G1/00 - C10G99/00
- C10G2300/10—Feedstock materials
- C10G2300/1003—Waste materials
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Wood Science & Technology (AREA)
- Mechanical Engineering (AREA)
- Analytical Chemistry (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention provides a system and a method for harmless recycling treatment of oily sludge, which comprises an oxidation extraction system, an extraction solvent generation system and a sludge drying system; the oxidation extraction system is communicated with the sludge drying system, the sludge drying system is communicated with the extraction solvent generation system, and the oxidation extraction system is communicated with the extractant generation system. The invention can efficiently finish the oil removing task of various types of oily sludge and has excellent universality. In the process of completing the harmless resource treatment of the oily sludge, the used extracting agent is from the system, and the additional purchase of the extracting agent is not needed, so that the treatment cost of the oily sludge is obviously reduced. The oil content of the oily sludge purified by the system is less than 0.3 percent, the oil removal rate is more than 99 percent, the purified oily sludge can be buried or used for garden fertilizers and building materials, the recovered oil can be directly blended and electrically desalted, obvious economic benefit is generated, and the harmless recycling purpose of the oily sludge is realized.
Description
Technical Field
The invention relates to a harmless recycling treatment system for oily sludge, in particular to a system for treating the oily sludge by an oxidation-extraction combined method. The system can realize that the oily sludge meets the requirements of relevant national standards, achieves the aims of harmlessness, reduction and recycling, and belongs to the technical field of oily sludge oil removal and environmental protection.
Background
The annual output of the current oil field oil-containing sludge and refined three-sludge exceeds 300 ten thousand tons, and the current oil field oil-containing sludge and refined three-sludge are dangerous wastes. It is mainly from petroleum exploitation, transportation, refining and oily sewage treatment. The oil-containing sludge is found to be listed in the national hazardous waste list (HW-08) because the oil-containing sludge contains some toxic and harmful substances to human bodies and the like. The main methods for treating the oily sludge currently include: burial, conditioning-separation, incineration, heat treatment, coking, biological, solvent extraction, and oxidation.
The oily sludge has complex composition and different sources, but after treatment, the oil content of the oily sludge needs to meet the requirement that the oil content of the purified oily sludge is less than or equal to 0.3 percent in GB4284-2018 agricultural sludge pollutant control Standard. The burying method can only treat the oily sludge with low oil content, heavy metal element content and water content, and for most oily sludge, the burying requirement cannot be met, and secondary pollution is easy to generate; the quenching and tempering-separation method can realize the reduction target of the oily sludge, but still cannot meet the requirement that the oil content of the purified oily sludge is less than 0.3 percent; the incineration method has large treatment capacity and thorough treatment on the oily sludge, the treated residues can meet the burying requirement, but the method has large one-time investment, and the waste gas generated by treatment is easy to generate secondary waste gas pollution; the heat treatment method is a harmless treatment method, the temperature is gradually raised under the oxygen-free condition to crack organic matters in the oily sludge, gas generated by cracking is condensed and recovered, and the residual residues meet the burying requirement, but the temperature required by thermal cracking is higher (more than 500 ℃), the process condition is harsh, the investment is large, and secondary waste gas pollution is easy to generate; the coking method can promote the resource utilization of the oily sludge, but has requirements on the solid content of the oily sludge and influences the coke quality, and the oily sludge of oil field enterprises and the 'three sludge' of refining enterprises cannot adopt the method. The biological method has various modes for treating the oily sludge, has low selectivity on the oily sludge and simpler process operation, but has high requirement on the selection of biological bacteria and longer treatment period.
The solvent extraction method utilizes the principle of 'similarity and intermiscibility', is a method for dissolving and recycling the organic matters in the oily sludge by using an organic solvent, and the existing solvent extraction method has the defects of large dosage of the extracting agent, low solvent recovery rate and high cost due to complex composition and preparation process of the extracting agent and multiple extraction, thereby limiting the industrial application of the method. The oxidation method is a chemical method, and utilizes an oxidant to perform partial oxidation decomposition on macromolecules, colloidal asphaltenes and extracellular polymers of medium organic matters in the oily sludge, so that fine mud-containing particles or carbon powder are desorbed from oil, and the purpose of separating the oily sludge is achieved.
Patent CN111606531A discloses a low-temperature enhanced separation method for oily sludge, which mainly comprises four steps of flotation separation, centrifugal separation, fenton oxidation and gravity settling to purify the oily sludge. The method has a certain effect on the oily sludge at the bottom of the oil field tank, but the oil content of the purified oily sludge of the oil field tank bottom which is placed for a long time still can not reach the standard of 0.3 percent, and the recovered oil can not meet the requirement of direct blending electric desalting because the solid content (more than 2 percent) and the water content (more than 2 percent) exceed the standard.
Patent CN111718105A discloses a treatment device and method for degrading oily sludge based on the combination of ozone oxidation and hydrogen peroxide oxidation, in the method, surfactant is added to reduce the surface tension of oil-sludge-water three phases, aeration and oxidation are assisted to degrade the oily sludge, and the degraded sludge is used as a fertilizer for plants. However, the method has a long treatment period (only the aeration flow needs more than 6 hours), so that the treatment scale is not large, the oil content of the treated sludge cannot reach the national standard, the method has a certain effect on residual activated sludge with low oil content, but has no obvious effect on tank bottom oil-containing sludge with high oil content.
The patent CN103693824B discloses a deep extraction coking process for oily sludge, which comprises the steps of removing a solid phase of the oily sludge by a centrifugal method, extracting and separating an oily liquid phase from the solid phase by a solvent, and feeding the oily liquid phase into a coking device. The extracted solid phase is mixed with coal for burning. The method is more thorough in treating the oily sludge, but needs multiple times of extraction, and the extractant cannot be recycled, so that the cost is higher. The recovered oil enters a coking device instead of an electric desalting device, which causes resource waste.
Patent CN110845101A discloses an oily sludge harmless treatment system and a treatment method thereof, the method is more thorough in treating oily sludge, but the oily sludge at the bottom of an aging tank needs to be extracted for multiple times, so that the solvent loss is increased, the occupied area of equipment is larger, the treatment cost is higher, and the universality of the oily sludge is not good.
Patent CN 113003922A discloses a system for treating oily sludge by integrated high-efficiency hot washing-advanced oxidation combined treatment and an oily sludge treatment method, persulfate and ferroferric oxide are used as oxidizing agents, and a surfactant is used as a washing agent, so that the method has a certain oil removing effect on unaged falling oily sludge, but has poor effects on oily sludge at the bottom of an aged oily sludge tank and oily sludge of a sewage treatment plant, the oil content of the treated oily sludge is far less than the national standard, and the treatment period is longer (more than 48 hours), so that the method is not beneficial to large-scale treatment.
The invention provides a harmless recycling treatment method system and a treatment method for oily sludge, wherein the method treats the oily sludge by using an oxidation-extraction combined process, and has the double advantages of an oxidation method and an extraction method and a synergistic effect. The used oxidation agent has high oxidation efficiency, the using amount of the oxidant is small, the method has universality for different types of oily sludge, the process is simple, the oily sludge treated by the oxidation agent is treated by an extraction method, the using amount of the extraction agent is small, and the extraction frequency is low. The whole process can realize large-scale treatment and high-efficiency treatment of the oily sludge, and the treatment cost is low. After treatment, the oil content in the oily sludge meets the requirements of national relevant standards (the oil content is less than 0.3 percent), and the oil removal rate is more than 99 percent. The recovered oil can be directly blended for electric desalting, thereby generating obvious economic benefit and realizing the aim of harmless resource of the oily sludge.
Disclosure of Invention
In order to solve the problems, the invention aims to provide a system for harmless and resource treatment of oily sludge.
The utility model provides a innoxious resourceful treatment oiliness mud system, takes place system, sludge drying system including oxidation extraction system, extraction solvent, oxidation extraction system and sludge drying system are linked together, sludge drying system and extraction solvent take place the system and are linked together, oxidation extraction system and extractant take place the system and are linked together, its characterized in that: a liquid phase outlet of a three-phase separator of the oxidation extraction system is connected with an oil-water separator of the extraction solvent generation system, a solid phase outlet of a two-phase separator of the oxidation extraction system is connected with a screw conveyor, the screw conveyor is connected with drying equipment of a sludge drying system, and a liquid phase outlet of the two-phase separator is connected with the oil-water separator of the extraction solvent generation system; a condenser of the sludge drying system is connected with a solid phase oil removal stirring tank of the oxidation extraction system; the light component outlet of the solvent generating tower of the extraction solvent generating system is respectively connected with the solid phase oil removing stirring tank and the heavy phase oil removing stirring tank of the oxidation extraction system.
The oxidation extraction system comprises: the oily sludge pipeline is connected with an oily sludge conditioning tank, the oily sludge conditioning tank is provided with a stirring device and an oxidizing agent inlet, and is connected with an oxidizing agent feeding pump, a mixed liquid outlet of the oily sludge conditioning tank is connected with an oily sludge conditioning tank output pump, an output pump of the oily sludge conditioning tank output pump is connected with a three-phase separator, a solid phase outlet of the three-phase separator is connected with a solid phase oil removing stirring tank, a heavy phase outlet of the three-phase separator is connected with a heavy phase oil removing stirring tank, and a liquid phase outlet of the three-phase separator is connected with an oil-water separator of an extraction solvent generation system;
a material outlet of the solid-phase oil removal stirring tank is connected with a discharge pump of the solid-phase oil removal stirring tank, and an outlet of the discharge pump of the solid-phase oil removal stirring tank is connected with the two-phase separator; the material outlet of the heavy phase oil removal stirring tank is connected with a discharge pump of the heavy phase oil removal stirring tank, the discharge pump outlet of the heavy phase oil removal stirring tank is connected with a two-phase separator, the solid phase outlet of the two-phase separator is connected with drying equipment of a sludge drying system, and the liquid phase outlet of the two-phase separator is connected with an oil-water separator of an extraction solvent generation system.
The sludge drying system comprises: the solid phase screw conveyor connected with the two-phase separator of the oxidation extraction system is connected with a drying device, a gas phase outlet of the drying device is connected with a condenser, the condenser is connected with a solid phase oil removal stirring tank of the oxidation extraction system, and the drying device is provided with a solid phase outlet.
The extraction solvent generation system comprises: the water phase outlet of the oil-water separator is connected with a sewage treatment device 22, the oil phase outlet is connected with a crude oil tank, the crude oil tank is provided with a crude oil tank delivery pump, the outlet of the crude oil tank delivery pump is connected with a solvent generation tower, the light component outlet of the solvent generation tower is respectively connected with a solid phase oil removal stirring tank and a heavy phase oil removal stirring tank, the residual component outlet of the solvent generation tower is connected with a heat exchanger, and the product after the heat exchanger is sent to an oil refining device.
The solvent generation tower consists of an atmospheric tower and/or a vacuum tower.
A treatment method for harmless resource treatment of oily sludge comprises the following steps:
(1) introducing the oily sludge raw material into a raw material conditioning tank from an outer pipeline of a boundary area, adding an oxidizing agent into the conditioning tank by using an oxidizing agent feeding pump, continuously stirring, conveying to a three-phase centrifuge by using an output pump of the oily sludge conditioning tank, and performing oil-water, heavy phase and solid phase separation;
(2) conveying the oil-water phase separated in the step (1) to an oil-water separator for oil-water separation, allowing the separated oil phase to enter a crude oil buffer tank, allowing the separated water phase to enter air flotation for air flotation oil removal, and discharging the water except the oil to a boundary area;
(3) conveying the crude oil separated in the step (2) to a solvent generation tower of an extractant generation system through a crude oil buffer tank, respectively feeding the extractant distilled from the solvent generation tower into a heavy phase oil removal tank and a solid phase oil removal tank, and conveying the tower bottom oil of the solvent generation tower to an oil refining device after heat exchange of a heat exchanger to 60 ℃;
(4) the heavy phase separated in the step (1) enters a heavy phase oil removing tank, an oxidation agent and an extraction agent are added into the heavy phase oil removing tank for oxidation-extraction oil removal, and then the mixed solution is conveyed to a two-phase centrifuge by a discharge pump of a heavy phase oil removing stirring tank for oil-water-solid separation;
(5) the solid phase separated in the step (1) enters a solid phase oil removing groove, an oxidizing agent and an extracting agent are added into the solid phase oil removing groove for oxidation-extraction oil removal, then the mixed solution is conveyed to a two-phase centrifuge by a discharge pump of a solid phase oil removing stirring groove for oil-water-solid separation;
(6) the oil water separated in the step (4) and the step (5) enters an oil-water separator;
(7) conveying the solid phase separated in the step (4) and the step (5) to a sludge drying device, and conveying the dried sludge to the outside of a battery limit; the extractant recovered in the drying process returns to the heavy phase oil removing tank and the solid phase oil removing tank.
The oxidizing agent in the step (1) comprises an oxidizing agent, an oxidation auxiliary agent, a surfactant and a dispersing agent, wherein the oxidizing agent isOne or two of hydrogen peroxide, concentrated sulfuric acid, potassium permanganate and concentrated nitric acid, wherein the addition amount of the oxidant is 0.05-0.5 percent of the mass of the oily sludge to be treated; the oxidation promoter is a metal oxide (preferably MnO)2、Fe2O3、TiO2CuO), ferrous salts (preferably FeSO)4、FeCl2、Fe(NO3)2) The addition amount of the oxidation auxiliary agent is 0.03-0.06 percent of the addition amount of the oxidant; the surfactant is one or more of organic sulfonate (preferably dodecyl benzene sulfonate and hexadecyl benzene sulfonate), organic sulfate (preferably dodecyl sulfate and hexadecyl sulfate) and organic ammonium halide (preferably dodecyl trimethyl ammonium bromide and tetradecyl trimethyl ammonium chloride), and the addition amount of the surfactant is 0.01-0.4% of the mass of the oily sludge to be treated; the dispersant is one or two of sodium tripolyphosphate, sodium metasilicate and sodium hexametaphosphate, and the addition amount of the dispersant is 0.03-0.1 percent of the mass of the oily sludge to be treated.
The mass of the light component produced by the agent generating tower is as follows: the mass of the oily sludge is 0.5-1.0: 1.
The oil-containing sludge harmless recycling treatment system and method are characterized in that the solvent generation tower in the step (3) consists of an atmospheric tower and a vacuum tower.
The sludge drying is to dry the sludge separated by the two-phase separator, the drying temperature is 130-180 ℃, and gas generated in the drying process is condensed and recovered and is used as an extractant supplement in a heavy-phase oil removal tank and a solid-phase oil removal tank.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention has excellent universality to different kinds of oily sludge.
2. The extractant used in the invention is derived from light components distilled from the recovered crude oil after the oil-containing sludge is deoiled by a rectifying device, and no new extractant is purchased from the outside, so that the operation cost of the device is obviously reduced.
3. The invention carries out three-phase separation on the tempered oily sludge to form oil, water, heavy phase and solid phase, thereby improving the processing capacity.
4. The oxidation-extraction combined process used in the invention ensures that the indexes of the treated oily sludge not only meet the national existing environmental protection standard, but also can recover the crude oil in the oily sludge, thereby generating economic benefit. The aim of resource harmless treatment of the oily sludge is fulfilled.
Drawings
FIG. 1 is a schematic view of a system for harmless resource treatment of oily sludge according to the present invention.
FIG. 1: 1-an oxidation extraction system, 2-an extraction solvent generation system, 3-a sludge drying system, 4-an oily sludge pipeline, 5-an oily sludge conditioning tank, 6-a three-phase separator, 7-an oxidation agent feeding pump, 9-a solid phase outlet of the three-phase separator, 10-a heavy phase outlet of the three-phase separator, 11-a liquid phase outlet of the three-phase separator, 12-a solid phase degreasing stirring tank, 13-a heavy phase degreasing stirring tank, 14-an oil-water separator, 15-a solvent generation tower, 16-a heat exchanger, 17-a crude oil tank, 18-a two-phase separator, 19-a condenser, 20-drying equipment, 21-a solid phase outlet of the drying equipment, 22-a sewage treatment device, 23-an oil refining device and 24-an oily sludge conditioning tank output pump, 25-solid phase oil removal stirring tank discharge pump, 26-heavy phase oil removal stirring tank discharge pump, 27-solid phase screw conveyor and 28-crude oil tank conveying pump.
Detailed Description
The present invention will be described in further detail with reference to the following data in conjunction with specific examples. The following examples are intended to illustrate the invention and are not intended to limit the scope of the invention in any way.
The oil content percentage of the oily sludge treated by the treatment method for oil removal and reduction of the oily sludge disclosed by the invention is represented by mass percentage, wherein the water content in the oily sludge and the oil content in the oily sludge are carried out by the following method.
The water content of the oily sludge is tested according to the method of GB/T212-2008.
The oil content in the oily sludge is tested according to the method of GB/T6504-2008.
The oil removal rate described in the following examples indicates the total organic matter removal rate of oily sludge after treatment by the method provided by the present invention.
Referring to fig. 1, a harmless resource treatment system for oily sludge and a treatment method thereof comprise the following steps:
(1) oxidation extraction system
The oily sludge is introduced into an oily sludge conditioning tank 5 from the outside of a boundary area, and an oxidizing agent is added into the oily sludge conditioning tank 5 and continuously stirred for oxidizing and removing the oil. The mixed liquid in the oily sludge preparation tank 5 is sent to a three-phase separator 6 by a pump 24, and solid phase (large-particle bottom sludge) separation, heavy phase (small-particle floating sludge) separation and liquid phase separation are performed. The solid phase separated by the three-phase separator 6 is introduced into a solid phase degreasing stirring tank 12, the separated heavy phase is introduced into a heavy phase degreasing stirring tank 13, and the separated liquid phase is introduced into an oil-water separator 14.
The materials in the solid phase degreasing agitation tank 12 and the materials in the heavy phase degreasing agitation tank 13 are respectively conveyed to the two-phase separator 18 by a pump 25 and a pump 26, and solid-liquid separation is performed. The solid phase separated by the two-phase separator 18 is introduced into a drying device 20 through a screw conveyor 27, and the separated liquid phase is introduced into the oil-water separator 14.
(2) Sludge drying system
The solid phase separated by the two-phase separator 18 is conveyed to a drying device 20 by a screw conveyor 27, and the sludge dried by the drying device 20 is used for burying, garden fertilizers or building materials. In the process of drying the sludge by the drying device 20, the generated steam is condensed by the condenser 19, and the generated liquid phase is introduced into the solid phase degreasing stirring tank 12 for extraction degreasing.
(3) Extraction solvent generation system
The liquid phase separated by the three-phase separator 6 and the liquid phase separated by the two-phase separator 18 are respectively introduced into the oil-water separator 14, under the action of the oil-water separator 14, the water phase is introduced into the sewage treatment device 22, the oil phase is introduced into the crude oil tank 17, the oil in the crude oil tank 17 is conveyed to the solvent generation tower 15 by the pump 28, and the light components generated by the solvent generation tower 15 are introduced into the solid phase oil removal stirring tank 12 and the heavy phase oil removal stirring tank 12 for extraction and oil removal. The remaining components of the solvent generation tower 15 are cooled by the heat exchanger 16 and introduced into the oil refining apparatus 23.
The oxidizing agent comprises an oxidizing agent, an oxidizing auxiliary agent, a surfactant and a dispersing agent, wherein the oxidizing agent is one or two of hydrogen peroxide, concentrated sulfuric acid, potassium permanganate and concentrated nitric acid, and the addition amount of the oxidizing agent is 0.05-0.5% of the mass of the oily sludge to be treated; the oxidation promoter is a metal oxide (preferably MnO)2、Fe2O3、TiO2CuO), ferrous salts (preferably FeSO)4、FeCl2、Fe(NO3)2) The addition amount of the oxidation auxiliary agent is 0.03-0.06 percent of the addition amount of the oxidant; the surfactant is one or more of organic sulfonate (preferably dodecyl benzene sulfonate and hexadecyl benzene sulfonate), organic sulfate (preferably dodecyl sulfate and hexadecyl sulfate) and organic ammonium halide (preferably dodecyl trimethyl ammonium bromide and tetradecyl trimethyl ammonium chloride), and the addition amount of the surfactant is 0.01-0.4% of the mass of the oily sludge to be treated; the dispersant is one or two of sodium tripolyphosphate, sodium metasilicate and sodium hexametaphosphate, and the addition amount of the dispersant is 0.03-0.1 percent of the mass of the oily sludge to be treated.
The extractant in the step (2) and the step (3) is a light component generated by crude oil recovered in the oil-containing sludge purification process through a solvent generation tower 15, and the mass of the extractant is as follows: the mass of the oily sludge is 0.5-1.0: 1.
The solvent generation tower 15 in the step (3) is composed of an atmospheric tower and a vacuum tower.
And drying the sludge separated by the two-phase separator at 130-180 ℃, and condensing and recovering gas generated in the drying process for use as an extractant replenisher in a heavy-phase oil removal tank and a solid-phase oil removal tank.
Example 1
The method is characterized in that a test is carried out by taking tank-cleaning oily sludge (oil content is 27.2% and water content is 38.3%) of a certain refinery company as a raw material, and hydrogen peroxide is taken as an oxidant, and the addition amount is 0.5%; in MnO2The addition amount of the oxidation auxiliary agent is 0.03 percent, and the addition amount of the lauryl sodium sulfate is 0.01 percent; the adding amount of sodium metasilicate is 0.03%; the extraction agent and the oily sludge are carried out according to the steps according to the mass ratio of 0.5:1, the oil content of the oily sludge after treatment is 0.15%, and the oil removal rate is 99.44%.
Example 2
The method is characterized in that a test is carried out by taking tank-cleaning oily sludge (oil content is 27.2% and water content is 38.3%) of a certain refinery company as a raw material, potassium permanganate is taken as an oxidant, and the addition amount is 0.10%; with Fe2O3Is an oxidation assistant with the addition amount of 0.05 percent, and the sodium hexadecyl benzene sulfonate is a surfactant with the addition amount of 0.15 percent; the addition amount of the sodium tripolyphosphate is 0.05 percent; the extraction agent and the oily sludge are carried out according to the steps according to the mass ratio of 1.0:1, the oil content of the oily sludge after treatment is 0.19%, and the oil removal rate is 99.30%.
Example 3
The method is characterized in that a test is carried out by taking oily sludge (oil content is 41.4% and water content is 55.6%) of a dirty oil pool of a certain petrochemical company as a raw material, and concentrated sulfuric acid is taken as an oxidant, and the addition amount is 0.4%; CuO is used as an oxidation auxiliary agent, dodecyl trimethyl ammonium bromide with the addition of 0.06 percent is used as a surfactant, and the addition of 0.05 percent; the addition amount of sodium hexametaphosphate is 0.1 percent; the extraction agent and the oily sludge are carried out according to the steps according to the mass ratio of 0.6:1, the oil content of the oily sludge after treatment is 0.27%, and the oil removal rate is 99.34%.
Example 4
The method is characterized in that a test is carried out by taking oily sludge (oil content is 41.4% and water content is 55.6%) of a dirty oil pool of a certain petrochemical company as a raw material, and concentrated nitric acid is taken as an oxidant, and the addition amount is 0.30%; with TiO2Is an oxidation assistant with the addition of 0.05 percent, and the tetradecyl trimethyl ammonium chloride is a surfactant with the addition of 0.05 percent; the adding amount of sodium metasilicate is 0.05 percent; the extraction agent and the oily sludge are carried out according to the steps according to the mass ratio of 0.6:1, the oil content of the oily sludge after treatment is 0.25%, and the oil removal rate is 99.39%.
Example 5
The residual active oily sludge (oil content) of a certain refinery company18.4 percent of water content 27.4 percent) as raw materials, taking hydrogen peroxide as an oxidant, and adding 0.2 percent of hydrogen peroxide; with FeSO4Is an oxidation assistant with the addition amount of 0.05 percent, and sodium hexadecyl sulfate is a surfactant with the addition amount of 0.2 percent; the adding amount of sodium metasilicate is 0.05 percent; the extraction agent and the oily sludge are carried out according to the steps according to the mass ratio of 1:1, the oil content of the oily sludge after treatment is 0.11%, and the oil removal rate is 99.40%.
Example 6
The test is carried out by taking residual active oily sludge (oil content is 18.4 percent and water content is 27.4 percent) of a certain refinery company as a raw material, and potassium permanganate is taken as an oxidant, and the addition amount is 0.4 percent; with FeCl2Is an oxidation assistant with the addition amount of 0.03 percent, and sodium hexadecyl sulfate is a surfactant with the addition amount of 0.2 percent; the adding amount of sodium metasilicate is 0.1%; the extraction agent and the oily sludge are carried out according to the steps according to the mass ratio of 0.5:1, the oil content of the oily sludge after treatment is 0.12%, and the oil removal rate is 99.34%.
Example 7
The method is characterized in that a test is carried out by taking tank-cleaning oily sludge (oil content is 27.2% and water content is 38.3%) of a certain refinery company as a raw material, and concentrated nitric acid is taken as an oxidant, and the addition amount is 0.3%; with Fe (NO)3)2Is an oxidation assistant with the addition amount of 0.03 percent, and the sodium dodecyl sulfate is a surfactant with the addition amount of 0.2 percent; the adding amount of sodium metasilicate is 0.08%; the extraction agent and the oily sludge are carried out according to the steps according to the mass ratio of 0.7:1, the oil content of the oily sludge after treatment is 0.22%, and the oil removal rate is 99.19%.
Example 8
A test is carried out by taking tank-cleaning oily sludge (oil content is 27.2% and water content is 38.3%) of a certain refinery company as a raw material, and taking concentrated sulfuric acid and potassium permanganate as oxidants with the addition amount of 0.5% (the addition amount of the concentrated sulfuric acid is 0.1% and the addition amount of the potassium permanganate is 0.4%); in MnO2Is an oxidation assistant with the addition amount of 0.03 percent, and the sodium dodecyl sulfate is a surfactant with the addition amount of 0.3 percent; the adding amount of sodium metasilicate is 0.03%; the extracting agent and the oily sludge are carried out according to the steps with the mass ratio of 0.6:1, and the treated oily sludgeThe sludge oil content is 0.17%, and the oil removal rate is 99.37%.
Example 9
The test is carried out by taking residual active oily sludge (oil content is 18.4 percent and water content is 27.4 percent) of a certain refinery company as a raw material, and taking hydrogen peroxide as an oxidant with the addition of 0.4 percent; in MnO2And TiO2Is used as an oxidation assistant and is added in an amount of 0.04% (MnO)2The addition amount is 0.02 percent and TiO2The addition amount is 0.02%), dodecyl trimethyl ammonium bromide is a surfactant, and the addition amount is 0.3%; the adding amount of sodium metasilicate is 0.07 percent; the extraction agent and the oily sludge are carried out according to the steps according to the mass ratio of 1:1, the oil content of the oily sludge after treatment is 0.16%, and the oil removal rate is 99.13%.
Example 10
The method is characterized in that an experiment is carried out by taking oily sludge (the oil content is 22.6 percent and the water content is 72.3 percent) at the bottom of a certain oil field tank as a raw material, potassium permanganate is taken as an oxidant, and the addition amount is 0.4 percent; with FeSO4Is an oxidation assistant, the addition amount is 0.05 percent, dodecyl trimethyl ammonium bromide and dodecyl benzene sulfonic acid sodium are surfactants, the addition amount is 0.15 percent (the addition amount of dodecyl trimethyl ammonium bromide is 0.05 percent, and the addition amount of dodecyl benzene sulfonic acid sodium is 0.1 percent); the addition amount of sodium hexametaphosphate is 0.1 percent; the extraction agent and the oily sludge are carried out according to the steps according to the mass ratio of 1:1, the oil content of the oily sludge after treatment is 0.19%, and the oil removal rate is 99.15%.
Example 11
The method is characterized in that a test is carried out by taking residual active oily sludge (with oil content of 18.4% and water content of 27.4%) of a certain refinery company as a raw material, hydrogen peroxide and concentrated sulfuric acid are taken as oxidants, and the addition amount of the hydrogen peroxide and the concentrated sulfuric acid is 0.5% (wherein the addition amount of the hydrogen peroxide is 0.3%, and the addition amount of the concentrated sulfuric acid is 0.2%); with FeCl2The addition amount of the oxidation auxiliary agent is 0.03 percent, and the addition amount of the sodium dodecyl sulfate is 0.15 percent; sodium metasilicate and sodium tripolyphosphate are used as dispersing agents, and the adding amount is 0.1% (the adding amount of the sodium metasilicate is 0.08%, and the adding amount of the sodium tripolyphosphate is 0.02%); the extraction agent and the oily sludge are carried out according to the steps according to the mass ratio of 0.5:1, the oil content of the oily sludge after treatment is 0.11 percent, and the oil removal rate isThe content was 99.40%.
Example 12
The method is characterized in that a test is carried out by taking oily sludge (oil content is 41.4% and water content is 55.6%) of a dirty oil pool of a certain petrochemical company as a raw material, and potassium permanganate and concentrated sulfuric acid are taken as oxidants, wherein the addition amount of the potassium permanganate is 0.03%, and the addition amount of the concentrated sulfuric acid is 0.01%; with FeCl2And Fe2O3The addition amount of the oxidation auxiliary agent is 0.03 percent (FeCl)2The addition amount is 0.01 percent and Fe2O3The addition amount is 0.02%), dodecyl trimethyl ammonium bromide is a surfactant, and the addition amount is 0.05%; the addition amount of the sodium tripolyphosphate is 0.1 percent; the extraction agent and the oily sludge are carried out according to the steps according to the mass ratio of 0.6:1, the oil content of the oily sludge after treatment is 0.22%, and the oil removal rate is 99.46%.
The embodiments described above are only a part of the embodiments of the present invention, and not all of them. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Claims (10)
1. A harmless recycling oily sludge treatment system comprises an oxidation extraction system (1), an extraction solvent generation system (2) and a sludge drying system (3); the oxidation extraction system (1) is communicated with the sludge drying system (3), the sludge drying system (3) is communicated with the extraction solvent generation system (2), and the oxidation extraction system (1) is communicated with the extractant generation system (2), and is characterized in that: a liquid phase outlet (11) of a three-phase separator of the oxidation extraction system is connected with an oil-water separator (14) of the extraction solvent generation system, a solid phase outlet of a two-phase separator (18) of the oxidation extraction system is connected with a screw conveyor (27) of the sludge drying system, the screw conveyor (27) is connected with drying equipment (20), and a liquid phase outlet of the two-phase separator (18) is connected with the oil-water separator (14) of the extraction solvent generation system; a condenser (19) of the sludge drying system is connected with a solid phase oil removal stirring tank (12) of the oxidation extraction system; the light component outlet of a solvent generating tower (15) of the extraction solvent generating system is respectively connected with a solid phase oil removing stirring tank (12) and a heavy phase oil removing stirring tank (13) of the oxidation extraction system.
2. The harmless resource treatment oil-containing sludge system according to claim 1, wherein the oxidation extraction system: an oily sludge pipeline (4) is connected with an oily sludge conditioning tank (5), the oily sludge conditioning tank (5) is provided with a stirring device and is connected with an oxidizing agent feeding pump (7), a mixed liquid outlet of the oily sludge conditioning tank (5) is connected with an oily sludge conditioning tank output pump (24), an outlet of the oily sludge conditioning tank output pump (24) is connected with a three-phase separator (6), a solid phase outlet (9) of the three-phase separator is connected with a solid phase oil removing stirring tank (12), a heavy phase outlet (10) of the three-phase separator is connected with a heavy phase oil removing stirring tank (13), and a liquid phase outlet (11) of the three-phase separator is connected with an oil-water separator (14) of an extraction solvent generation system;
a material outlet of the solid phase oil removal stirring tank (12) is connected with a discharge pump (25) of the solid phase oil removal stirring tank, and an outlet of the discharge pump (25) of the solid phase oil removal stirring tank is connected with the two-phase separator (18); the material outlet of the heavy phase oil removal stirring tank (13) is connected with a discharge pump (26) of the heavy phase oil removal stirring tank, the outlet of the discharge pump (26) of the heavy phase oil removal stirring tank is connected with a two-phase separator (18), the solid phase outlet of the two-phase separator (18) is connected with a screw conveyor (27), the screw conveyor (27) is connected with drying equipment (20) of a sludge drying system, and the liquid phase outlet of the two-phase separator (18) is connected with an oil-water separator (14) of an extraction solvent generation system.
3. The system for harmless resource treatment of oily sludge according to claim 1, which is characterized in that the sludge drying system comprises: the solid phase screw conveyor (27) connected with the two-phase separator (18) of the oxidation extraction system is connected with the drying device (20), the gas phase outlet of the drying device (20) is connected with the condenser (19), the condenser (19) is connected with the solid phase oil removing stirring tank (12) of the oxidation extraction system, and the drying device is provided with a solid phase outlet (21).
4. The harmless resource treatment oil-containing sludge system according to claim 1, characterized in that the extraction solvent generation system: the water phase outlet of the oil-water separator (14) is connected with a sewage treatment device (22), the oil phase outlet is connected with a crude oil tank (17), the crude oil tank (17) is provided with a crude oil tank delivery pump (28), the outlet of the crude oil tank delivery pump (28) is connected with a solvent generation tower (15), the light component outlet of the solvent generation tower (15) is respectively connected with a solid phase oil removal stirring tank (12) and a heavy phase oil removal stirring tank (13), and the residual component outlet of the solvent generation tower (15) is connected with a heat exchanger (16).
5. The system for harmless resource treatment of oily sludge according to claim 4, wherein the solvent generation tower (15) is composed of an atmospheric tower and/or a vacuum tower.
6. A treatment method for harmless resource treatment of oily sludge is characterized by comprising the following steps:
(1) introducing the oily sludge raw material into a raw material conditioning tank from an outer pipeline of a boundary area, adding an oxidizing agent into the conditioning tank by using an oxidizing agent feeding pump, continuously stirring, conveying to a three-phase centrifuge by using an output pump of the oily sludge conditioning tank, and performing oil-water, heavy phase and solid phase separation;
(2) conveying the oil-water phase separated in the step (1) to an oil-water separator for oil-water separation, allowing the separated oil phase to enter a crude oil buffer tank, allowing the separated water phase to enter air flotation for air flotation oil removal, and discharging the water except the oil to a boundary area;
(3) conveying the crude oil separated in the step (2) to a solvent generation tower of an extractant generation system through a crude oil buffer tank, respectively feeding the extractant distilled from the solvent generation tower into a heavy phase oil removal tank and a solid phase oil removal tank, and conveying the tower bottom oil of the solvent generation tower to an oil refining device after heat exchange of a heat exchanger to 60 ℃;
(4) the heavy phase separated in the step (1) enters a heavy phase oil removing tank, an oxidation agent and an extraction agent are added into the heavy phase oil removing tank for oxidation-extraction oil removal, and then the mixed solution is conveyed to a two-phase centrifuge by a discharge pump of a heavy phase oil removing stirring tank for oil-water-solid separation;
(5) the solid phase separated in the step (1) enters a solid phase oil removing groove, an oxidizing agent and an extracting agent are added into the solid phase oil removing groove for oxidation-extraction oil removal, then the mixed solution is conveyed to a two-phase centrifuge by a discharge pump of a solid phase oil removing stirring groove for oil-water-solid separation;
(6) the oil water separated in the step (4) and the step (5) enters an oil-water separator;
(7) conveying the solid phase separated in the step (4) and the step (5) to a sludge drying device, and conveying the dried sludge to the outside of a battery limit; the extractant recovered in the drying process returns to the heavy phase oil removing tank and the solid phase oil removing tank.
7. The method for treating the harmless resource oily sludge according to claim 6, wherein the oxidizing agents in the step (1), the step (3) and the step (4) comprise an oxidizing agent, an oxidation assistant, a surfactant and a dispersing agent, wherein the oxidizing agent is one or two of hydrogen peroxide, concentrated sulfuric acid, potassium permanganate and concentrated nitric acid, and the adding amount of the oxidizing agent is 0.05-0.5 percent of the mass of the oily sludge to be treated; the oxidation auxiliary agent is one or more of metal oxide and ferrous salt, and the addition amount of the oxidation auxiliary agent is 0.03-0.06% of the addition amount of the oxidant; the surfactant is one or more of organic sulfonate, organic sulfate and organic ammonium halide, and the addition amount of the surfactant is 0.01-0.4 percent of the mass of the oily sludge to be treated; the dispersant is one or two of sodium tripolyphosphate, sodium metasilicate and sodium hexametaphosphate, and the addition amount of the dispersant is 0.03 to 0.1 percent of the mass of the oily sludge to be treated; the surfactant is preferably one or more of dodecylbenzene sulfonate, hexadecylbenzene sulfonate, dodecyl sulfate, hexadecyl sulfate, dodecyl trimethyl ammonium bromide and tetradecyl trimethyl ammonium chloride.
8. The method for treating the oily sludge as a harmless resource according to claim 6, wherein the extractant used in the steps (4) and (5) is a light component produced by distillation of crude oil recovered in the purification process of the oily sludge through a rectifying device, and the mass of the extractant is as follows: the mass of the oily sludge is 0.5-1.0: 1.
9. The method for treating oily sludge as harmless resources according to claim 6, wherein the oxidative degreasing and the extractant degreasing in the steps (4) and (5) are performed simultaneously in the same reaction tank.
10. The method for treating oily sludge as harmless resources according to claim 6, wherein the sludge separated by the two-phase centrifuge needs to be dried at 130-180 ℃, and gas generated in the drying process is condensed and recovered for use as an extractant replenisher in a heavy phase oil removal tank and a solid phase oil removal tank.
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