CN111151530B - Cleaning method for oil storage tank - Google Patents
Cleaning method for oil storage tank Download PDFInfo
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- CN111151530B CN111151530B CN201911399290.0A CN201911399290A CN111151530B CN 111151530 B CN111151530 B CN 111151530B CN 201911399290 A CN201911399290 A CN 201911399290A CN 111151530 B CN111151530 B CN 111151530B
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- oil
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- storage tank
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- 238000004140 cleaning Methods 0.000 title claims abstract description 77
- 238000000034 method Methods 0.000 title claims abstract description 12
- 239000003921 oil Substances 0.000 claims abstract description 316
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 162
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 52
- 238000001914 filtration Methods 0.000 claims abstract description 48
- 238000011084 recovery Methods 0.000 claims abstract description 48
- 239000007789 gas Substances 0.000 claims abstract description 46
- 239000007788 liquid Substances 0.000 claims abstract description 39
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 26
- 238000003756 stirring Methods 0.000 claims abstract description 16
- 239000002699 waste material Substances 0.000 claims abstract description 13
- 239000007787 solid Substances 0.000 claims abstract description 9
- 239000002893 slag Substances 0.000 claims abstract description 4
- 235000019198 oils Nutrition 0.000 claims description 300
- 238000005086 pumping Methods 0.000 claims description 49
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 31
- 239000001301 oxygen Substances 0.000 claims description 31
- 229910052760 oxygen Inorganic materials 0.000 claims description 31
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 26
- -1 aluminum sulfate amine Chemical class 0.000 claims description 25
- 235000019476 oil-water mixture Nutrition 0.000 claims description 25
- 230000001502 supplementing effect Effects 0.000 claims description 24
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 18
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 claims description 18
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 13
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 12
- 239000002283 diesel fuel Substances 0.000 claims description 9
- 239000008394 flocculating agent Substances 0.000 claims description 9
- 229910052708 sodium Inorganic materials 0.000 claims description 8
- 239000011734 sodium Substances 0.000 claims description 8
- GOOHAUXETOMSMM-UHFFFAOYSA-N Propylene oxide Chemical compound CC1CO1 GOOHAUXETOMSMM-UHFFFAOYSA-N 0.000 claims description 7
- 238000005429 filling process Methods 0.000 claims description 7
- 229920001451 polypropylene glycol Polymers 0.000 claims description 7
- 239000003549 soybean oil Substances 0.000 claims description 7
- 235000012424 soybean oil Nutrition 0.000 claims description 7
- LRWZZZWJMFNZIK-UHFFFAOYSA-N 2-chloro-3-methyloxirane Chemical compound CC1OC1Cl LRWZZZWJMFNZIK-UHFFFAOYSA-N 0.000 claims description 6
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 claims description 6
- 239000004359 castor oil Substances 0.000 claims description 6
- 235000019438 castor oil Nutrition 0.000 claims description 6
- ZEMPKEQAKRGZGQ-XOQCFJPHSA-N glycerol triricinoleate Natural products CCCCCC[C@@H](O)CC=CCCCCCCCC(=O)OC[C@@H](COC(=O)CCCCCCCC=CC[C@@H](O)CCCCCC)OC(=O)CCCCCCCC=CC[C@H](O)CCCCCC ZEMPKEQAKRGZGQ-XOQCFJPHSA-N 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 6
- 239000000244 polyoxyethylene sorbitan monooleate Substances 0.000 claims description 6
- 235000010482 polyoxyethylene sorbitan monooleate Nutrition 0.000 claims description 6
- 229940068968 polysorbate 80 Drugs 0.000 claims description 6
- 229920000053 polysorbate 80 Polymers 0.000 claims description 6
- 239000000126 substance Substances 0.000 claims description 6
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 5
- PIICEJLVQHRZGT-UHFFFAOYSA-N Ethylenediamine Chemical compound NCCN PIICEJLVQHRZGT-UHFFFAOYSA-N 0.000 claims description 5
- 229920003171 Poly (ethylene oxide) Polymers 0.000 claims description 5
- ANBBXQWFNXMHLD-UHFFFAOYSA-N aluminum;sodium;oxygen(2-) Chemical compound [O-2].[O-2].[Na+].[Al+3] ANBBXQWFNXMHLD-UHFFFAOYSA-N 0.000 claims description 5
- 230000002146 bilateral effect Effects 0.000 claims description 5
- DNJIEGIFACGWOD-UHFFFAOYSA-N ethyl mercaptane Natural products CCS DNJIEGIFACGWOD-UHFFFAOYSA-N 0.000 claims description 5
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 claims description 5
- BPLYVSYSBPLDOA-GYOJGHLZSA-N n-[(2r,3r)-1,3-dihydroxyoctadecan-2-yl]tetracosanamide Chemical compound CCCCCCCCCCCCCCCCCCCCCCCC(=O)N[C@H](CO)[C@H](O)CCCCCCCCCCCCCCC BPLYVSYSBPLDOA-GYOJGHLZSA-N 0.000 claims description 5
- 230000003014 reinforcing effect Effects 0.000 claims description 5
- 229910001388 sodium aluminate Inorganic materials 0.000 claims description 5
- DGVVWUTYPXICAM-UHFFFAOYSA-N β‐Mercaptoethanol Chemical compound OCCS DGVVWUTYPXICAM-UHFFFAOYSA-N 0.000 claims description 5
- GWBWGPRZOYDADH-UHFFFAOYSA-N [C].[Na] Chemical compound [C].[Na] GWBWGPRZOYDADH-UHFFFAOYSA-N 0.000 claims description 4
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 4
- 238000000926 separation method Methods 0.000 claims description 4
- 239000007921 spray Substances 0.000 claims description 4
- 238000005507 spraying Methods 0.000 claims description 4
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims description 3
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims description 3
- 229920000742 Cotton Polymers 0.000 claims description 3
- 241001268993 Heterochrosis Species 0.000 claims description 3
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 3
- 239000004743 Polypropylene Substances 0.000 claims description 3
- DPXJVFZANSGRMM-UHFFFAOYSA-N acetic acid;2,3,4,5,6-pentahydroxyhexanal;sodium Chemical compound [Na].CC(O)=O.OCC(O)C(O)C(O)C(O)C=O DPXJVFZANSGRMM-UHFFFAOYSA-N 0.000 claims description 3
- 235000011114 ammonium hydroxide Nutrition 0.000 claims description 3
- 239000001768 carboxy methyl cellulose Substances 0.000 claims description 3
- 239000000460 chlorine Substances 0.000 claims description 3
- 229910052801 chlorine Inorganic materials 0.000 claims description 3
- 239000008367 deionised water Substances 0.000 claims description 3
- 229910021641 deionized water Inorganic materials 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- 238000011049 filling Methods 0.000 claims description 3
- 150000008282 halocarbons Chemical class 0.000 claims description 3
- 239000011499 joint compound Substances 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 238000005191 phase separation Methods 0.000 claims description 3
- 239000000344 soap Substances 0.000 claims description 3
- 235000019812 sodium carboxymethyl cellulose Nutrition 0.000 claims description 3
- 229920001027 sodium carboxymethylcellulose Polymers 0.000 claims description 3
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 claims description 3
- 238000004880 explosion Methods 0.000 abstract description 4
- 231100000572 poisoning Toxicity 0.000 abstract description 4
- 230000000607 poisoning effect Effects 0.000 abstract description 4
- 239000013049 sediment Substances 0.000 description 5
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- 239000000243 solution Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000003973 paint Substances 0.000 description 3
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- 238000005406 washing Methods 0.000 description 3
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- 239000004576 sand Substances 0.000 description 2
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- 238000010276 construction Methods 0.000 description 1
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- 238000005260 corrosion Methods 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
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- 230000002349 favourable effect Effects 0.000 description 1
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- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/08—Cleaning containers, e.g. tanks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B5/00—Other centrifuges
- B04B5/10—Centrifuges combined with other apparatus, e.g. electrostatic separators; Sets or systems of several centrifuges
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B13/00—Accessories or details of general applicability for machines or apparatus for cleaning
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/08—Cleaning containers, e.g. tanks
- B08B9/093—Cleaning containers, e.g. tanks by the force of jets or sprays
- B08B9/0936—Cleaning containers, e.g. tanks by the force of jets or sprays using rotating jets
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- 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
- C10G33/00—Dewatering or demulsification of hydrocarbon oils
- C10G33/04—Dewatering or demulsification of hydrocarbon oils with chemical means
-
- 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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
-
- 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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention discloses a cleaning method of an oil storage tank, which comprises the following steps: recovering the residual oil and oil gas in the oil storage tank; cleaning the oil storage tank, and cleaning the inner wall of the oil storage tank by using high-pressure water; recovering the cleaning liquid in the oil storage tank; filtering the cleaning liquid, namely filtering the cleaning liquid in the recovery tank, and separating oil, water and solid in the cleaning liquid; stirring and separating the oil residue in the stirrer to separate out oil, water and solid in the oil residue; filtering the water in the water supply tank, and circularly filtering the water in the water supply tank by adopting a three-stage filtering unit; removing the deposited waste residues, namely removing the deposited waste residues in the oil storage tank; and (4) recovering the tank body, namely installing and fixing a manhole cover on a flange of a manhole of the oil storage tank after the slag removal of constructors is finished, and completing the recovery of the tank body. The invention adopts the oil gas recovery unit to recover the oil gas extruded in the nitrogen charging process, thereby eliminating the hidden troubles of personnel poisoning and oil tank explosion.
Description
Technical Field
The invention relates to the technical field of oil storage tank cleaning, in particular to an oil storage tank cleaning method.
Background
The oil storage tank is a container for storing oil products and is a main device for producing oil. During long-time storage and transportation of the oil storage tank for the finished oil, a small amount of impurities such as sand, soil, heavy metal salts and the like in the finished oil can be deposited and accumulated at the bottom of the oil storage tank together with water due to density difference to form a black and thick gelatinous substance, namely bottom mud of the oil storage tank. Impurities and moisture can reduce the quality of the finished oil and influence the accuracy of oil product calculation; the corrosion of the oil storage tank is accelerated, and the bottom plate is perforated in severe cases, so that oil leakage accidents are caused; static electricity is generated and accumulated, causing a static electricity accident. In addition, when oil upgrading and reloading different oils, the oil remained in the tank and the newly loaded oil cannot be mixed, the oil storage tank is leaked or damaged, the oil storage tank needs to be cleaned when the oil storage tank needs to be inspected or repaired by fire, and meanwhile, the oil storage tank also needs to be cleaned and overhauled regularly.
At present, the inside of an oil storage tank is cleaned manually in China, and generally, gas in the tank is discharged into the atmosphere by using a blower, and after the concentration of oil gas in the tank is reduced to a safe range, the oil gas enters the tank manually for cleaning.
The prior art has at least the following problems:
in the prior art, manual cleaning is adopted to directly discharge oil gas in the oil storage tank into the atmosphere, so that the oil storage tank is not environment-friendly and is easy to cause personnel poisoning and oil tank explosion.
Aiming at the problems that the oil gas in the oil storage tank is directly discharged into the atmosphere by manual cleaning in the prior art, the oil storage tank is not environment-friendly, and is easy to cause personnel poisoning and oil tank explosion, an effective solution is not provided at present.
Disclosure of Invention
The invention aims to provide a method for cleaning an oil storage tank, aiming at the defects of the prior art.
The cleaning method of the oil storage tank comprises the following steps:
step 1, recovering oil and oil gas, namely recovering the residual oil and oil gas in the oil storage tank:
step 1.1, recovering the stored oil for the first time, and pumping the stored oil in the oil storage tank into the oil storage tank:
step 1.1.1, pumping the stored oil in the oil storage tank by adopting a vacuum auxiliary centrifugal pump, and pumping the stored oil into the oil storage tank;
step 1.1.2, when the vacuum auxiliary centrifugal pump is vacuumized, closing the vacuum auxiliary centrifugal pump through a PLC (programmable logic controller);
step 1.1.3, starting a pneumatic diaphragm pump through a PLC controller, sucking the stored oil in an oil storage tank, and sucking the stored oil into the oil storage tank;
step 1.1.4, when the pneumatic diaphragm pump finishes oil storage and suction, closing the pneumatic diaphragm pump through a PLC (programmable logic controller);
step 1.2, replacing oxygen in the tank, namely, injecting nitrogen into the oil storage tank by adopting a nitrogen making machine while pumping the oil stored in the oil storage tank, and replacing the oxygen in the tank;
step 1.3, recovering oil gas, namely recovering the oil gas extruded in the nitrogen filling process by adopting an oil gas recovery unit while filling nitrogen into the oil storage tank;
step 1.4, a water filling process:
step 1.4.1, injecting water into the oil storage tank until the water surface in the oil storage tank is higher than the height of the reinforcing ribs at the bottom side of the oil storage tank, so that the stored oil floats on the water surface;
step 1.4.2, pumping the oil-water mixture in the oil storage tank by adopting a vacuum auxiliary centrifugal pump, and pumping the oil-water mixture into a recovery tank;
step 1.4.3, when the vacuum auxiliary centrifugal pump is vacuumized, closing the vacuum auxiliary centrifugal pump through a PLC (programmable logic controller);
step 1.4.4, starting the pneumatic diaphragm pump through the PLC, continuously sucking the oil-water mixture in the oil storage tank, and sucking the oil-water mixture into the recovery tank;
step 1.4.5, when the pneumatic diaphragm pump finishes pumping the oil-water mixture, closing the pneumatic diaphragm pump through the PLC;
step 1.5, filtering the oil-water mixture, pumping the oil-water mixture in the recovery tank into a disc type three-phase separator, separating the oil-water mixture by the disc type three-phase separator, storing the separated oil into gasoline and diesel oil bilateral oil storage tanks, storing the separated water into a water supplementing tank, and pumping the water in the water supplementing tank into a water supply tank for secondary utilization;
step 2, cleaning the oil storage tank, and cleaning the inner wall of the oil storage tank by high-pressure water:
step 2.1, pressurizing water to 0-0.8MPa by using a cleaning pump, and spraying the water out of a rotary spray head in the oil storage tank to wash the inner wall of the oil storage tank;
2.2, replacing oxygen in the tank, namely continuously injecting nitrogen into the oil storage tank by adopting a nitrogen making machine while cleaning the oil storage tank to replace the oxygen in the tank;
step 2.3, oil gas recovery, wherein oil gas in the oil storage tank is continuously recovered by adopting an oil gas recovery unit while oxygen in the tank is replaced;
and 3, recovering the cleaning liquid in the oil storage tank, and pumping the cleaning liquid in the oil storage tank into the recovery tank after the oil storage tank is cleaned:
step 3.1, pumping the cleaning liquid in the oil storage tank by adopting a vacuum auxiliary centrifugal pump, and pumping the cleaning liquid into a recovery tank;
step 3.2, when the vacuum auxiliary centrifugal pump is vacuumized, closing the vacuum auxiliary centrifugal pump through the PLC;
3.3, starting the pneumatic diaphragm pump through the PLC, continuously sucking the cleaning liquid in the oil storage tank, and sucking the cleaning liquid into the recovery tank;
step 3.4, when the pneumatic diaphragm pump finishes the suction of the cleaning liquid, the pneumatic diaphragm pump is closed through the PLC;
and 4, filtering the cleaning liquid, namely filtering the cleaning liquid in the recovery tank, and separating oil, water and solids in the cleaning liquid:
step 4.1, pumping the cleaning solution in the recovery tank to a disc type three-phase separator;
step 4.2, the disc type three-phase separator performs separation operation on the cleaning solution, separated oil is stored in gasoline and diesel oil bilateral oil storage tanks, separated water is stored in a water supplementing tank, water in the water supplementing tank is pumped into a water supply tank through a water supplementing pump for secondary utilization, and separated oil residues are stored in a stirrer;
and 5, stirring and separating the oil residue in the stirrer, and separating out oil, water and solids in the oil residue:
step 5.1, adding water and oil residue into a stirrer, starting the stirrer, and mixing the water and the oil residue, wherein the stirring intensity of the stirrer is 500r/min, and the stirring time is 50 min;
step 5.2, adding a demulsifier into the stirrer to uniformly mix the demulsifier and the oil residue, wherein the addition amount of the demulsifier is 0.02 percent of the weight of the oil residue, the stirring intensity of the stirrer is 450r/min, and the stirring time is 50 min;
step 5.3, adding a flocculating agent into the stirrer to fully mix the oil residue and the flocculating agent in the stirrer, wherein the addition amount of the flocculating agent is 0.5 percent of the weight of the oil residue;
step 5.4, pumping the flocculated oil residues to a disc type three-phase separator for three-phase separation of oil, water and mud, respectively storing the separated oil in oil storage tanks at two sides of the gasoline and diesel oil, storing the separated water in a water supplementing tank, pumping the water in the water supplementing tank to a water supply tank through a water supplementing pump for secondary utilization, and conveying the separated residues to a blade dryer for drying;
step 5.5, the residue dried by the paddle dryer is returned to an incinerator for high-temperature incineration, the incineration temperature is 1100 ℃, and the residue is completely decomposed at high temperature;
step 6, filtering the water in the water supply tank, and performing circulating filtration on the water in the water supply tank by adopting a three-level filtering unit:
step 6.1, pumping water in the water supply tank to a three-stage filtering unit for filtering, wherein the input end of the three-stage filtering unit is communicated with the bottom of the water supply tank, and the output end of the three-stage filtering unit is communicated with the top of the water supply tank, so that the water body in the water supply tank is subjected to circulating filtration;
step 6.2, carrying out primary filtration on water by adopting PP cotton to remove silt and rust in the water;
step 6.3, carrying out secondary filtration on the water by adopting granular activated carbon to remove oil in the water;
step 6.4, performing third-stage filtration on the water by adopting compressed activated carbon to remove the heterochrosis, peculiar smell, residual chlorine and halogenated hydrocarbon in the water;
and 7, removing the deposited waste residues, namely removing the deposited waste residues in the oil storage tank:
step 7.1, replacing oxygen in the tank, namely continuously injecting nitrogen into the oil storage tank by adopting a nitrogen making machine to replace the oxygen in the tank;
step 7.2, oil gas recovery, wherein oil gas in the oil storage tank is continuously recovered by adopting an oil gas recovery unit while oxygen in the tank is replaced;
7.3, detecting the oxygen content in the oil storage tank by using a gas detector;
step 7.4, when the oxygen content in the oil storage tank is not higher than 21%, opening a manhole cover on the oil storage tank, and allowing constructors to enter the oil storage tank from the manhole to deposit waste residues at the bottom of the tank;
and 8, recovering the tank body, namely installing and fixing a manhole cover on a flange of a manhole of the oil storage tank after the slag removal of constructors is finished, and completing the recovery of the tank body.
Further, in step 5.2, the demulsifier is composed of the following substances in parts by mass:
15 parts of propylene oxide, namely propylene oxide,
8 parts of triethanolamine, namely 8 parts of triethanolamine,
7 parts of sodium carbonate, namely sodium carbonate,
7 parts of ethylene glycol, namely 7 parts of ethylene glycol,
5 parts of polypropylene oxide, namely 5 parts of polypropylene oxide,
50 parts of water-soluble sodium sulfonate soap,
40 parts of castor oil, namely 40 parts of castor oil,
6 parts of soybean oil, namely soybean oil,
25 parts of naphtha,
polysorbate-80, 10 parts of polysorbate-80,
3 parts of 2% ammonia water,
200 portions of water.
Further, in step 5.3, the flocculant is composed of the following substances in parts by mass:
10 parts of epoxy chloropropane, namely 10 parts of epoxy chloropropane,
8 parts of triethylamine, namely 8 parts of triethylamine,
14 parts of sodium carboxymethyl cellulose,
7 parts of anhydrous ethanol, namely 7 parts of anhydrous ethanol,
13 parts of aluminum sulfate amine, namely 13 parts of aluminum sulfate amine,
12 parts of sodium carbonate, namely sodium carbonate,
14 parts of polymerized ferric trichloride, namely polymerizing ferric trichloride,
6 parts of ethylene diamine, namely 6 parts of ethylene diamine,
20 parts of sodium carboxylate, namely sodium carboxylate,
30 parts of mercaptoethanol, namely 30 parts of mercaptoethanol,
40 parts of polyoxyethylene, namely 40 parts of polyethylene oxide,
15 parts of sodium aluminate, namely sodium aluminate,
10 parts of carbon sodium, namely 10 parts of sodium carbonate,
12 parts of sodium aluminum sulfate, namely sodium aluminum sulfate,
45 parts of deionized water.
Compared with the prior art, the cleaning method of the oil storage tank has the following remarkable advantages:
1, the mechanical cleaning is adopted, so that the labor intensity is greatly reduced, the personal safety is ensured, and the cleaning efficiency of the oil storage tank is improved.
2, the oily sewage is separated into water, oil and solid by adopting a disc type three-phase separator, so that the waste is recycled, and the energy is saved.
3, water in the water supply tank is filtered through the water body filtering unit, so that the environmental pollution is reduced, and a water source is saved.
4, retrieve washing liquid or trapped oil through adopting vacuum auxiliary centrifugal pump and pneumatic diaphragm pump, along with the going on of washing liquid or trapped oil work in the suction oil storage tank, when the vacuum auxiliary centrifugal pump appearing managing to find time often, switch pneumatic diaphragm pump and carry out the work of extraction, prevent to manage to find time the phenomenon and take place, be favorable to the continuation of washing liquid or trapped oil suction work to go on.
And 5, by adding 10 parts of epoxy chloropropane, 8 parts of triethylamine and 10 parts of carbon sodium, the flocculant can effectively remove the viscosity of the paint in water, so that paint residues of the paint are coagulated and floated, the removal is facilitated, no secondary pollution is caused, the sewage treatment effect is facilitated to be improved, the treatment cost is reduced, and the high-applicability and high-practicability effects are achieved.
6, by adding 15 parts of propylene oxide, 5 parts of polyoxypropylene and 6 parts of soybean oil, the demulsifier is green and environment-friendly, has strong adaptability, high demulsification efficiency and is not easy to corrode.
7, the recovery rate of crude oil is high, oil in oil residue deposited in the bottom of the oil storage tank is recovered to the maximum extent through multiple separation and recovery, the recovery rate accounts for more than 98% of total sediments, only less than 2% of impurities such as rust, silt and the like which do not contain oil basically remain, and manual tank cleaning is to take all sediments as residual oil to be manually cleaned, and pollution and waste are caused.
8, the tank cleaning period is short, and the mechanical cleaning mode is adopted, so that the mechanical cleaning device is not influenced by the sediment amount of the oil storage tank, the size of the oil tank and the weather, the efficiency is high, and the construction period is short.
And 9, impacting the sediment on the inner wall of the oil storage tank by adopting high-speed water flow through a pressure pump, wherein the recovered oil cannot form sediment in a short period due to dilution, dissolution and diffusion effects, the water content is not increased in the recovered oil, the wax content is reduced, and sand or impurities are not contained.
And 10, inert gas is used for controlling the oxygen concentration in the oil storage tank, so that the potential hazard possibly caused by static generated by the spraying of the rotary spray head is avoided.
11, after the cleaning liquid and the oil-water mixture are subjected to oil-water separation, water is recycled as cleaning water, and the separated oil is recovered, so that the environment pollution is avoided, and dirty oil is not discharged outwards.
And 12, an oil gas recovery unit is adopted to recover oil gas extruded in the nitrogen filling process, so that the problems of personnel poisoning and oil tank explosion are solved.
Drawings
FIG. 1 is a schematic flow diagram of a method for cleaning an oil storage tank according to the present invention.
Detailed Description
The invention is described in further detail below with reference to the drawings and the detailed description.
The cleaning method of the oil storage tank comprises the following steps:
step 1, recovering oil and oil gas, namely recovering the residual oil and oil gas in the oil storage tank:
step 1.1, recovering the stored oil for the first time, and pumping the stored oil in the oil storage tank into the oil storage tank:
step 1.1.1, pumping the stored oil in the oil storage tank by adopting a vacuum auxiliary centrifugal pump, and pumping the stored oil into the oil storage tank;
step 1.1.2, when the vacuum auxiliary centrifugal pump is vacuumized, closing the vacuum auxiliary centrifugal pump through a PLC (programmable logic controller);
step 1.1.3, starting a pneumatic diaphragm pump through a PLC controller, sucking the stored oil in an oil storage tank, and sucking the stored oil into the oil storage tank;
step 1.1.4, when the pneumatic diaphragm pump finishes oil storage and suction, closing the pneumatic diaphragm pump through a PLC (programmable logic controller);
step 1.2, replacing oxygen in the tank, namely, injecting nitrogen into the oil storage tank by adopting a nitrogen making machine while pumping the oil stored in the oil storage tank, and replacing the oxygen in the tank;
step 1.3, recovering oil gas, namely recovering the oil gas extruded in the nitrogen filling process by adopting an oil gas recovery unit while filling nitrogen into the oil storage tank;
step 1.4, a water filling process:
step 1.4.1, injecting water into the oil storage tank until the water surface in the oil storage tank is higher than the reinforcing ribs at the bottom side of the oil storage tank, so that the stored oil floats on the water surface, wherein the reinforcing ribs are fixedly arranged on the inner wall of the oil storage tank in China, so that part of the stored oil can be blocked between the two reinforcing ribs when the stored oil is recovered, and the stored oil floats on the water surface in a mode of injecting water into the oil storage tank and is used for recovering the stored oil;
step 1.4.2, pumping the oil-water mixture in the oil storage tank by adopting a vacuum auxiliary centrifugal pump, and pumping the oil-water mixture into a recovery tank;
step 1.4.3, when the vacuum auxiliary centrifugal pump is vacuumized, closing the vacuum auxiliary centrifugal pump through a PLC (programmable logic controller);
step 1.4.4, starting the pneumatic diaphragm pump through the PLC, continuously sucking the oil-water mixture in the oil storage tank, and sucking the oil-water mixture into the recovery tank;
step 1.4.5, when the pneumatic diaphragm pump finishes pumping the oil-water mixture, closing the pneumatic diaphragm pump through the PLC;
and step 1.5, filtering the oil-water mixture, pumping the oil-water mixture in the recovery tank into a disc type three-phase separator, separating the oil-water mixture by the disc type three-phase separator, storing the separated oil into gasoline and diesel oil bilateral oil storage tanks, storing the separated water into a water supplementing tank, and pumping the water in the water supplementing tank into a water supply tank for secondary utilization.
Step 2, cleaning the oil storage tank, and cleaning the inner wall of the oil storage tank by high-pressure water:
step 2.1, pressurizing water to 0-0.8MPa by using a cleaning pump, and spraying the water out of a rotary spray head in the oil storage tank to wash the inner wall of the oil storage tank;
2.2, replacing oxygen in the tank, namely continuously injecting nitrogen into the oil storage tank by adopting a nitrogen making machine while cleaning the oil storage tank to replace the oxygen in the tank;
and 2.3, recovering oil gas, wherein the oil gas in the oil storage tank is continuously recovered by adopting an oil gas recovery unit while oxygen in the tank is replaced.
And 3, recovering the cleaning liquid in the oil storage tank, and pumping the cleaning liquid in the oil storage tank into the recovery tank after the oil storage tank is cleaned:
step 3.1, pumping the cleaning liquid in the oil storage tank by adopting a vacuum auxiliary centrifugal pump, and pumping the cleaning liquid into a recovery tank;
step 3.2, when the vacuum auxiliary centrifugal pump is vacuumized, closing the vacuum auxiliary centrifugal pump through the PLC;
3.3, starting the pneumatic diaphragm pump through the PLC, continuously sucking the cleaning liquid in the oil storage tank, and sucking the cleaning liquid into the recovery tank;
and 3.4, when the pneumatic diaphragm pump finishes the suction of the cleaning liquid, closing the pneumatic diaphragm pump through the PLC.
And 4, filtering the cleaning liquid, namely filtering the cleaning liquid in the recovery tank, and separating oil, water and solids in the cleaning liquid:
step 4.1, pumping the cleaning solution in the recovery tank to a disc type three-phase separator;
and 4.2, separating the cleaning liquid by using a disc type three-phase separator, storing the separated oil into gasoline and diesel oil double-side oil storage tanks, storing the separated water into a water supplementing tank, pumping the water in the water supplementing tank into a water supply tank by using a water supplementing pump for secondary utilization, and storing the separated oil residue into a stirrer.
And 5, stirring and separating the oil residue in the stirrer, and separating out oil, water and solids in the oil residue:
step 5.1, adding water and oil residue into a stirrer, starting the stirrer, and mixing the water and the oil residue, wherein the stirring intensity of the stirrer is 500r/min, and the stirring time is 50 min;
step 5.2, adding a demulsifier into the stirrer to uniformly mix the demulsifier and the oil residue, wherein the addition amount of the demulsifier is 0.02 percent of the weight of the oil residue, the stirring intensity of the stirrer is 450r/min, and the stirring time is 50 min;
step 5.3, adding a flocculating agent into the stirrer to fully mix the oil residue and the flocculating agent in the stirrer, wherein the addition amount of the flocculating agent is 0.5 percent of the weight of the oil residue;
step 5.4, pumping the flocculated oil residues to a disc type three-phase separator for three-phase separation of oil, water and mud, respectively storing the separated oil in oil storage tanks at two sides of the gasoline and diesel oil, storing the separated water in a water supplementing tank, pumping the water in the water supplementing tank to a water supply tank through a water supplementing pump for secondary utilization, and conveying the separated residues to a blade dryer for drying;
and 5.5, turning the residue dried by the paddle dryer to an incinerator for high-temperature incineration, wherein the incineration temperature is 1100 ℃, and the residue is completely decomposed at high temperature.
Step 6, filtering the water in the water supply tank, and performing circulating filtration on the water in the water supply tank by adopting a three-level filtering unit:
step 6.1, pumping water in the water supply tank to a three-stage filtering unit for filtering, wherein the input end of the three-stage filtering unit is communicated with the bottom of the water supply tank, and the output end of the three-stage filtering unit is communicated with the top of the water supply tank, so that the water body in the water supply tank is subjected to circulating filtration;
step 6.2, carrying out primary filtration on water by adopting PP cotton to remove silt and rust in the water;
step 6.3, carrying out secondary filtration on the water by adopting granular activated carbon to remove oil in the water;
and 6.4, performing third-stage filtration on the water by adopting compressed activated carbon to remove the heterochrosis, peculiar smell, residual chlorine and halogenated hydrocarbon in the water.
And 7, removing the deposited waste residues, namely removing the deposited waste residues in the oil storage tank:
step 7.1, replacing oxygen in the tank, namely continuously injecting nitrogen into the oil storage tank by adopting a nitrogen making machine to replace the oxygen in the tank;
step 7.2, oil gas recovery, wherein oil gas in the oil storage tank is continuously recovered by adopting an oil gas recovery unit while oxygen in the tank is replaced;
7.3, detecting the oxygen content in the oil storage tank by using a gas detector;
and 7.4, when the oxygen content in the oil storage tank is not higher than 21%, opening a manhole cover on the oil storage tank, and allowing constructors to enter the oil storage tank from the manhole to deposit waste residues at the bottom of the tank.
And 8, recovering the tank body, namely installing and fixing a manhole cover on a flange of a manhole of the oil storage tank after the slag removal of constructors is finished, and completing the recovery of the tank body.
Further, in step 5.2, the demulsifier is composed of the following substances in parts by mass:
15 parts of propylene oxide, namely propylene oxide,
8 parts of triethanolamine, namely 8 parts of triethanolamine,
7 parts of sodium carbonate, namely sodium carbonate,
7 parts of ethylene glycol, namely 7 parts of ethylene glycol,
5 parts of polypropylene oxide, namely 5 parts of polypropylene oxide,
50 parts of water-soluble sodium sulfonate soap,
40 parts of castor oil, namely 40 parts of castor oil,
6 parts of soybean oil, namely soybean oil,
25 parts of naphtha,
polysorbate-80, 10 parts of polysorbate-80,
3 parts of 2% ammonia water,
200 portions of water.
Further, in step 5.3, the flocculant is composed of the following substances in parts by mass:
10 parts of epoxy chloropropane, namely 10 parts of epoxy chloropropane,
8 parts of triethylamine, namely 8 parts of triethylamine,
14 parts of sodium carboxymethyl cellulose,
7 parts of anhydrous ethanol, namely 7 parts of anhydrous ethanol,
13 parts of aluminum sulfate amine, namely 13 parts of aluminum sulfate amine,
12 parts of sodium carbonate, namely sodium carbonate,
14 parts of polymerized ferric trichloride, namely polymerizing ferric trichloride,
6 parts of ethylene diamine, namely 6 parts of ethylene diamine,
20 parts of sodium carboxylate, namely sodium carboxylate,
30 parts of mercaptoethanol, namely 30 parts of mercaptoethanol,
40 parts of polyoxyethylene, namely 40 parts of polyethylene oxide,
15 parts of sodium aluminate, namely sodium aluminate,
10 parts of carbon sodium, namely 10 parts of sodium carbonate,
12 parts of sodium aluminum sulfate, namely sodium aluminum sulfate,
45 parts of deionized water.
The above description is only for the preferred embodiment of the present invention and should not be construed as limiting the present invention, and various modifications and changes can be made by those skilled in the art without departing from the spirit and principle of the present invention, and any modifications, equivalents, improvements, etc. should be included in the scope of the claims of the present invention.
Claims (2)
1. A cleaning method for an oil storage tank is characterized by comprising the following steps:
step 1, recovering oil and oil gas, namely recovering the residual oil and oil gas in an oil storage tank;
step 1.1, recovering the stored oil for the first time, and pumping the stored oil in the oil storage tank into the oil storage tank:
step 1.1.1, pumping the stored oil in the oil storage tank by adopting a vacuum auxiliary centrifugal pump, and pumping the stored oil into the oil storage tank;
step 1.1.2, when the vacuum auxiliary centrifugal pump is vacuumized, closing the vacuum auxiliary centrifugal pump through a PLC (programmable logic controller);
step 1.1.3, starting a pneumatic diaphragm pump through a PLC controller, sucking the stored oil in an oil storage tank, and sucking the stored oil into the oil storage tank;
step 1.1.4, when the pneumatic diaphragm pump finishes oil storage and suction, closing the pneumatic diaphragm pump through a PLC (programmable logic controller);
step 1.2, replacing oxygen in the tank, namely, injecting nitrogen into the oil storage tank by adopting a nitrogen making machine while pumping the oil stored in the oil storage tank, and replacing the oxygen in the tank;
step 1.3, recovering oil gas, namely recovering the oil gas extruded in the nitrogen filling process by adopting an oil gas recovery unit while filling nitrogen into the oil storage tank;
step 1.4, a water filling process:
step 1.4.1, injecting water into the oil storage tank until the water surface in the oil storage tank is higher than the height of the reinforcing ribs at the bottom side of the oil storage tank, so that the stored oil floats on the water surface;
step 1.4.2, pumping the oil-water mixture in the oil storage tank by adopting a vacuum auxiliary centrifugal pump, and pumping the oil-water mixture into a recovery tank;
step 1.4.3, when the vacuum auxiliary centrifugal pump is vacuumized, closing the vacuum auxiliary centrifugal pump through a PLC (programmable logic controller);
step 1.4.4, starting the pneumatic diaphragm pump through the PLC, continuously sucking the oil-water mixture in the oil storage tank, and sucking the oil-water mixture into the recovery tank;
step 1.4.5, when the pneumatic diaphragm pump finishes pumping the oil-water mixture, closing the pneumatic diaphragm pump through the PLC;
step 1.5, filtering the oil-water mixture, pumping the oil-water mixture in the recovery tank into a disc type three-phase separator, separating the oil-water mixture by the disc type three-phase separator, storing the separated oil into gasoline and diesel oil bilateral oil storage tanks, storing the separated water into a water supplementing tank, and pumping the water in the water supplementing tank into a water supply tank for secondary utilization;
step 2, cleaning the oil storage tank, and cleaning the inner wall of the oil storage tank by using high-pressure water;
step 2.1, pressurizing water to 0-0.8MPa by using a cleaning pump, and spraying the water out of a rotary spray head in the oil storage tank to wash the inner wall of the oil storage tank;
2.2, replacing oxygen in the tank, namely continuously injecting nitrogen into the oil storage tank by adopting a nitrogen making machine while cleaning the oil storage tank to replace the oxygen in the tank;
step 2.3, oil gas recovery, wherein oil gas in the oil storage tank is continuously recovered by adopting an oil gas recovery unit while oxygen in the tank is replaced;
step 3, recovering the cleaning liquid in the oil storage tank, and pumping the cleaning liquid in the oil storage tank into the recovery tank after the oil storage tank is cleaned;
step 3.1, pumping the cleaning liquid in the oil storage tank by adopting a vacuum auxiliary centrifugal pump, and pumping the cleaning liquid into a recovery tank;
step 3.2, when the vacuum auxiliary centrifugal pump is vacuumized, closing the vacuum auxiliary centrifugal pump through the PLC;
3.3, starting the pneumatic diaphragm pump through the PLC, continuously sucking the cleaning liquid in the oil storage tank, and sucking the cleaning liquid into the recovery tank;
step 3.4, when the pneumatic diaphragm pump finishes the suction of the cleaning liquid, the pneumatic diaphragm pump is closed through the PLC;
step 4, filtering the cleaning liquid, namely filtering the cleaning liquid in the recovery tank, and separating oil, water and solids in the cleaning liquid;
step 4.1, pumping the cleaning solution in the recovery tank to a disc type three-phase separator;
step 4.2, the disc type three-phase separator performs separation operation on the cleaning solution, separated oil is stored in gasoline and diesel oil bilateral oil storage tanks, separated water is stored in a water supplementing tank, water in the water supplementing tank is pumped into a water supply tank through a water supplementing pump for secondary utilization, and separated oil residues are stored in a stirrer;
step 5, stirring and separating the oil residue in the stirrer to separate out oil, water and solid in the oil residue;
step 5.1, adding water and oil residue into a stirrer, starting the stirrer, and mixing the water and the oil residue, wherein the stirring intensity of the stirrer is 500r/min, and the stirring time is 50 min;
step 5.2, adding a demulsifier into the stirrer to uniformly mix the demulsifier and the oil residue, wherein the addition amount of the demulsifier is 0.02 percent of the weight of the oil residue, the stirring intensity of the stirrer is 450r/min, and the stirring time is 50 min;
step 5.3, adding a flocculating agent into the stirrer to fully mix the oil residue and the flocculating agent in the stirrer, wherein the addition amount of the flocculating agent is 0.5 percent of the weight of the oil residue;
the flocculant comprises the following substances in parts by mass: 10 parts of epoxy chloropropane, 8 parts of triethylamine, 14 parts of sodium carboxymethylcellulose, 7 parts of absolute ethyl alcohol, 13 parts of aluminum sulfate amine, 12 parts of sodium carbonate, 14 parts of polymeric ferric trichloride, 6 parts of ethylenediamine, 20 parts of sodium carboxylate, 30 parts of mercaptoethanol, 40 parts of polyethylene oxide, 15 parts of sodium aluminate, 10 parts of carbon sodium, 12 parts of sodium aluminum sulfate and 45 parts of deionized water;
step 5.4, pumping the flocculated oil residues to a disc type three-phase separator for three-phase separation of oil, water and mud, respectively storing the separated oil in oil storage tanks at two sides of the gasoline and diesel oil, storing the separated water in a water supplementing tank, pumping the water in the water supplementing tank to a water supply tank through a water supplementing pump for secondary utilization, and conveying the separated residues to a blade dryer for drying;
step 5.5, the residue dried by the paddle dryer is returned to an incinerator for high-temperature incineration, the incineration temperature is 1100 ℃, and the residue is completely decomposed at high temperature;
step 6, filtering the water in the water supply tank, and circularly filtering the water in the water supply tank by adopting a three-stage filtering unit;
step 6.1, pumping water in the water supply tank to a three-stage filtering unit for filtering, wherein the input end of the three-stage filtering unit is communicated with the bottom of the water supply tank, and the output end of the three-stage filtering unit is communicated with the top of the water supply tank, so that the water body in the water supply tank is subjected to circulating filtration;
step 6.2, carrying out primary filtration on water by adopting PP cotton to remove silt and rust in the water;
step 6.3, carrying out secondary filtration on the water by adopting granular activated carbon to remove oil in the water;
step 6.4, performing third-stage filtration on the water by adopting compressed activated carbon to remove the heterochrosis, peculiar smell, residual chlorine and halogenated hydrocarbon in the water;
step 7, removing deposited waste residues, namely removing the deposited waste residues in the oil storage tank;
step 7.1, replacing oxygen in the tank, namely continuously injecting nitrogen into the oil storage tank by adopting a nitrogen making machine to replace the oxygen in the tank;
step 7.2, oil gas recovery, wherein oil gas in the oil storage tank is continuously recovered by adopting an oil gas recovery unit while oxygen in the tank is replaced;
7.3, detecting the oxygen content in the oil storage tank by using a gas detector;
step 7.4, when the oxygen content in the oil storage tank is not higher than 21%, opening a manhole cover on the oil storage tank, and allowing constructors to enter the oil storage tank from the manhole to deposit waste residues at the bottom of the tank;
and 8, recovering the tank body, namely installing and fixing a manhole cover on a flange of a manhole of the oil storage tank after the slag removal of constructors is finished, and completing the recovery of the tank body.
2. The method for cleaning the oil storage tank as claimed in claim 1, wherein in the step 5.2, the demulsifier is composed of the following substances in parts by mass:
15 parts of propylene oxide, namely propylene oxide,
8 parts of triethanolamine, namely 8 parts of triethanolamine,
7 parts of sodium carbonate, namely sodium carbonate,
7 parts of ethylene glycol, namely 7 parts of ethylene glycol,
5 parts of polypropylene oxide, namely 5 parts of polypropylene oxide,
50 parts of water-soluble sodium sulfonate soap,
40 parts of castor oil, namely 40 parts of castor oil,
6 parts of soybean oil, namely soybean oil,
25 parts of naphtha,
polysorbate-80, 10 parts of polysorbate-80,
3 parts of 2% ammonia water,
200 portions of water.
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| CN112620265A (en) * | 2020-12-29 | 2021-04-09 | 江苏羟源环能科技有限公司 | Cleaning method and cleaning system for oil-containing and mercury-containing polluted container |
| CN115365246A (en) * | 2021-05-20 | 2022-11-22 | 中国石油天然气股份有限公司 | Gas field water tank cleaning device and cleaning method |
| CN113477639B (en) * | 2021-06-25 | 2022-06-10 | 武钢集团昆明钢铁股份有限公司 | Method for cleaning ferric trichloride stains |
| CN113578538A (en) * | 2021-08-09 | 2021-11-02 | 安徽泓泽新材料科技有限公司 | Gas protection method for inner cavity of centrifugal machine |
| CN114871217A (en) * | 2022-06-09 | 2022-08-09 | 九江天赐高新材料有限公司 | Cleaning method of closed container |
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