CN111154510A - Waste mineral oil treatment system and application method thereof - Google Patents
Waste mineral oil treatment system and application method thereof Download PDFInfo
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- CN111154510A CN111154510A CN202010074542.9A CN202010074542A CN111154510A CN 111154510 A CN111154510 A CN 111154510A CN 202010074542 A CN202010074542 A CN 202010074542A CN 111154510 A CN111154510 A CN 111154510A
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- 239000002699 waste material Substances 0.000 title claims abstract description 182
- 239000002480 mineral oil Substances 0.000 title claims abstract description 86
- 235000010446 mineral oil Nutrition 0.000 title claims abstract description 86
- 238000000034 method Methods 0.000 title claims description 34
- 239000003921 oil Substances 0.000 claims abstract description 214
- 238000003756 stirring Methods 0.000 claims abstract description 48
- 239000004927 clay Substances 0.000 claims abstract description 39
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 39
- 238000000926 separation method Methods 0.000 claims abstract description 37
- 239000000428 dust Substances 0.000 claims abstract description 32
- 239000000295 fuel oil Substances 0.000 claims abstract description 32
- 239000002351 wastewater Substances 0.000 claims abstract description 30
- 239000002912 waste gas Substances 0.000 claims abstract description 29
- 239000000839 emulsion Substances 0.000 claims abstract description 22
- 238000004821 distillation Methods 0.000 claims abstract description 20
- 238000005086 pumping Methods 0.000 claims abstract description 12
- 238000005191 phase separation Methods 0.000 claims abstract description 11
- 239000007789 gas Substances 0.000 claims description 77
- 238000010438 heat treatment Methods 0.000 claims description 36
- 238000001179 sorption measurement Methods 0.000 claims description 33
- 239000012208 gear oil Substances 0.000 claims description 20
- 238000006303 photolysis reaction Methods 0.000 claims description 17
- 239000002199 base oil Substances 0.000 claims description 14
- 230000015843 photosynthesis, light reaction Effects 0.000 claims description 12
- 238000009833 condensation Methods 0.000 claims description 9
- 230000005494 condensation Effects 0.000 claims description 9
- 230000008676 import Effects 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 2
- 238000007599 discharging Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 239000006227 byproduct Substances 0.000 abstract description 4
- 238000004064 recycling Methods 0.000 abstract description 4
- 239000000047 product Substances 0.000 description 27
- 241000700159 Rattus Species 0.000 description 12
- 239000002920 hazardous waste Substances 0.000 description 12
- 238000005516 engineering process Methods 0.000 description 11
- 230000008569 process Effects 0.000 description 11
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 6
- 239000010802 sludge Substances 0.000 description 6
- 239000012528 membrane Substances 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 4
- 239000002253 acid Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000005611 electricity Effects 0.000 description 4
- 239000010687 lubricating oil Substances 0.000 description 4
- 238000007670 refining Methods 0.000 description 4
- 230000007059 acute toxicity Effects 0.000 description 3
- 231100000403 acute toxicity Toxicity 0.000 description 3
- 238000001704 evaporation Methods 0.000 description 3
- 230000008020 evaporation Effects 0.000 description 3
- 239000001294 propane Substances 0.000 description 3
- 230000008929 regeneration Effects 0.000 description 3
- 238000011069 regeneration method Methods 0.000 description 3
- 238000012216 screening Methods 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
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- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
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- 239000000463 material Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 238000000199 molecular distillation Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
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- 231100000419 toxicity Toxicity 0.000 description 2
- 230000001988 toxicity Effects 0.000 description 2
- HLLSOEKIMZEGFV-UHFFFAOYSA-N 4-(dibutylsulfamoyl)benzoic acid Chemical group CCCCN(CCCC)S(=O)(=O)C1=CC=C(C(O)=O)C=C1 HLLSOEKIMZEGFV-UHFFFAOYSA-N 0.000 description 1
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 241001465754 Metazoa Species 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 150000001335 aliphatic alkanes Chemical class 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 150000001555 benzenes Chemical class 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004945 emulsification Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- DDTIGTPWGISMKL-UHFFFAOYSA-N molybdenum nickel Chemical class [Ni].[Mo] DDTIGTPWGISMKL-UHFFFAOYSA-N 0.000 description 1
- 238000001728 nano-filtration Methods 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 150000002989 phenols Chemical class 0.000 description 1
- 125000005575 polycyclic aromatic hydrocarbon group Chemical group 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 231100000167 toxic agent Toxicity 0.000 description 1
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Images
Classifications
-
- 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
- C10G53/08—Treatment of hydrocarbon oils, in the absence of hydrogen, by two or more refining processes plural serial stages only including at least one sorption step
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/007—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by irradiation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/80—Employing electric, magnetic, electromagnetic or wave energy, or particle radiation
- B01D2259/804—UV light
-
- 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
- C10G2300/1007—Used oils
Abstract
The invention discloses a waste mineral oil treatment system, which comprises a preprocessor, a No. 1 energy regenerator, a preliminary distillation tower, an oil-water separator, a No. 2 energy regenerator, a No. 2 distillation tower, a clay stirring tank, an oil residue separator, a No. 4 energy regenerator, a gas-dust separation tower, a waste emulsion treatment system, a waste gas treatment system and a vacuum pumping system, wherein the preprocessor is adopted to carry out three-phase separation on waste mineral oil to obtain waste oil, waste water and oil residue A, then the No. 1 energy regenerator, the No. 2 energy regenerator, the distillation tower and a condensing device which correspond to the energy regenerator are used to separate light oil and medium oil in the waste oil, the No. 4 energy regenerator is used to heat and treat the oil residue generated by the preprocessor and the oil residue separator and heavy components in the waste oil, and the heavy oil in the waste mineral oil are separated and purified, thereby the recycling of the waste mineral oil is realized, and no secondary pollution, safe and reliable production and stable quality of byproducts.
Description
Technical Field
The invention belongs to the technical field of waste mineral oil treatment, and particularly relates to a waste mineral oil treatment system and an application method thereof.
Background
The waste mineral oil is oil which is changed from the original physical and chemical properties due to the pollution of impurities, oxidation and heat, and cannot be continuously used, and mainly comes from oil sludge and oil bottoms generated in oil exploitation and refining, sediments generated in the storage process of mineral oil, oil residues and filter media generated in the oil replacement and regeneration processes of equipment such as machinery, power, transportation and the like. The main components of the waste mineral oil comprise C15-C36 alkane, Polycyclic Aromatic Hydrocarbon (PAHs), olefin, benzene series, phenols and the like, wherein a plurality of components have certain toxicity and harm effects on human bodies, and sulfide, petroleum substances and rich nutrients contained in the waste mineral oil particularly seriously pollute water and soil, so that waste oil is poured randomly, illegally transferred and sold, the human health is not influenced, secondary black pollution is brought to the environment, serious pollution is caused to water and soil, and the growth of animals and plants and the living environment of human are harmed.
At present, the treatment mode of the waste mineral oil mainly adopts the traditional incineration and landfill modes and the waste oil recycling treatment technology. The waste mineral oil is treated by adopting the traditional incineration and landfill modes, so that not only is the resource waste of the waste mineral oil caused, but also a large amount of land is occupied, and meanwhile, the environment is seriously polluted; the waste oil recovery and regeneration technology mainly comprises acid-clay refining, distillation-solvent refining-hydrorefining, distillation-hydrorefining, membrane separation, biological treatment technology and molecular distillation; acid-clay refining type uses sulfuric acid to refine waste lubricating oil, and after acid residues are removed, clay is used for refining, so that the method has the advantages of low investment, strong adaptability and capability of treating small batches of waste oil, but acid residues, waste clay, waste water and a large amount of acid gas sulfur dioxide which are difficult to treat are formed after the waste oil is regenerated, and the acid residues, the waste clay, the waste water and the acid gas sulfur dioxide are harmful to the body health of staff, corrode equipment and pollute the environment; the distillation-solvent refining-hydrorefining type firstly removes water and hydrogen components in the waste oil through atmospheric distillation, then performs first propane extraction to remove oil sludge, oxides and a part of additives, the oil from which propane is removed is subjected to reduced pressure distillation, then performs propane extraction to remove residual additives, and finally all lubricating oil fractions are sent to hydrorefining; the distillation-hydrorefining type is to heat and distill the waste oil, separate out the lubricating oil components and the residues, then carry out the hydrotreatment of the fractions in a series of molybdenum-nickel catalyst fixed bed reactors, the process has the characteristics of no waste treatment problem, high yield, good product quality, but high requirements on the raw materials, but complex pretreatment (demetalization, adsorption and the like) is needed when the content of the metals in the raw materials is high; the membrane separation technology mainly applies a vibrating membrane technology and a nanofiltration membrane technology, the two technologies have simple process, low operation temperature and low operation cost, but the technology is immature, the application range is small, the investment is large, the service life of the membrane is short, and the replacement cost is high; the biological treatment technology is adopted to treat the waste mineral oil, so that the treatment capacity is large, the cost is low, but the treatment effect is poor, and the treatment efficiency is low due to the fact that the environment is greatly influenced; the molecular distillation process for regenerating base oil mainly realizes separation by means of difference of molecular motion mean free path of different substances, separates base oil from waste lubricating oil, and refines the base oil by means of decoloration, filtration and the like to produce qualified regenerated base oil.
As the quantity of vehicles used in the manufacturing industry is increased rapidly, and the yield of the waste mineral oil is increased year by year, a process technology for efficiently, environmentally and massively treating the waste mineral oil is developed, secondary pollution and secondary hazardous waste are avoided, and the method is a key field of waste mineral oil regeneration research.
Disclosure of Invention
Aiming at the defects, the invention discloses a waste mineral oil treatment system which has no secondary pollution, is safe and reliable and has stable byproduct quality and an application method thereof, and realizes the recycling of waste mineral oil resources.
The invention is realized by adopting the following technical scheme:
a waste mineral oil treatment system comprising a preconditioner for separating waste mineral oil into wastewater, waste oil and oil sludge; the wastewater is conveyed to a waste emulsion disposal system through a lifting pump; the oil residue is collected and then sent to a No. 4 energy regenerator for disposal; the waste oil is conveyed to a No. 1 energy regenerator through a gear oil pump, light components generated by the No. 1 energy regenerator are conveyed to a primary distillation tower through a pipeline, an outlet at the top of the primary distillation tower is connected to an inlet of a No. 1 condenser through a pipeline, an outlet of the No. 1 condenser is connected to an inlet of a No. 1 receiving tank through a pipeline, an outlet of the No. 1 receiving tank is connected to an inlet of an oil-water separator through a pipeline, a water phase outlet of the oil-water separator is connected to a waste emulsion disposal system through a pipeline, and an oil phase outlet of the oil-water separator is connected to a No. 1 finished product tank through a pipeline; the heavy component of the No. 1 energy regenerator is conveyed to the No. 2 energy regenerator through a pipeline, gas generated by the No. 2 energy regenerator is conveyed to the No. 2 rectifying tower through a pipeline, the outlet at the top of the No. 2 rectifying tower is connected to the inlet of a No. 2 condenser through a pipeline, the outlet of the No. 2 condenser is connected to the inlet of a No. 2 receiving tank through a pipeline, the outlet of the No. 2 receiving tank is connected to the inlet of a clay stirring tank through a pipeline, the outlet of the clay stirring tank is connected to an oil residue separator through a pipeline, the oil phase outlet of the oil residue separator is connected to a No. 2 finished product tank through a pipeline, and oil residue separated by the oil residue separator is conveyed to the No. 4 energy regenerator for disposal; the mixed gas and dust generated by the No. 4 energy regenerator enters a gas and dust separation tower through a pipeline, the gas separated by the gas and dust separation tower enters a No. 4 condenser through a pipeline, the outlet of the No. 4 condenser is connected to the inlet of a No. 4 receiving tank through a pipeline, and the heavy oil collected by the No. 4 receiving tank is conveyed to a No. 3 finished product tank through a gear oil pump; no. 1 condenser, No. 2 condenser and No. 4 condenser's gas vent is respectively through the import of pipe connection to condenser again, and the export of condenser is through pipe connection to No. 4 receiving tank again, and the gas vent of condenser is through pipe connection to exhaust-gas treatment system again.
Further, the waste mineral oil treatment system also comprises a No. 3 energy regenerator, heavy components of the No. 1 energy regenerator are conveyed to the No. 3 energy regenerator through a pipeline, gas generated by the No. 3 energy regenerator is conveyed to a No. 3 rectifying tower through a pipeline, an outlet of the No. 3 rectifying tower is connected to an inlet of a No. 3 condenser through a pipeline, an outlet of the No. 3 condenser is connected to an inlet of a No. 3 receiving tank through a pipeline, and an outlet of the No. 3 receiving tank is connected to an inlet of a clay stirring tank through a pipeline; the exhaust port of the No. 3 condenser is connected to the inlet of the secondary condenser through a pipeline. The energy regenerator No. 3 and the energy regenerator No. 2 are used in parallel, the treatment capacity of the waste mineral oil of the system is increased, the treatment efficiency is improved, and meanwhile, the normal energy regenerator can be used for keeping the continuous operation of the treatment system when the energy regenerator No. 2 or the energy regenerator No. 3 breaks down.
Further, the waste mineral oil treatment system also comprises a feeding trough, the feeding trough is used for collecting oil residues from the pre-processor and the oil residue separator, and an outlet of the feeding trough is connected to an inlet of the No. 4 energy regenerator through a pipeline.
Further, ash generated by the No. 4 energy regenerator is discharged through a screw conveyor.
Further, the waste gas treatment system comprises a waste gas buffer tank, a No. 1 vacuum pump, a UV photolysis purifier, a primary adsorption tower, a secondary adsorption tower and an exhaust pipe; the import of exhaust buffer tank and the export of condenser once more pass through the pipe connection, the export of exhaust buffer tank passes through the access connection of pipeline and No. 1 vacuum pump, the exit of No. 1 vacuum pump passes through the access connection of pipeline and UV photodissociation clarifier, the exit of UV photodissociation clarifier passes through the access connection of pipeline and one-level adsorption tower, the import of one-level adsorption tower passes through the access connection of pipeline and second grade adsorption tower, the export and the outer pipe connection of arranging of second grade adsorption tower, the export height of outer calandria is greater than 15 m. Waste gas treatment system utilizes UV photodissociation clarifier and two-stage adsorption tower can handle the harmful substance in the waste gas, right the tail gas that waste mineral oil processing system generated carries out innocent treatment, and outer row back can not cause environmental pollution scheduling problem.
Further, the waste mineral oil treatment system also comprises a vacuum pumping system, wherein the vacuum pumping system comprises a No. 2 vacuum pump, a No. 2 vacuum buffer tank, a No. 3 vacuum pump and a No. 3 vacuum buffer tank; the inlet of the No. 2 vacuum buffer tank is respectively communicated with the tops of the No. 2 energy regenerator, the No. 3 energy regenerator and the No. 4 energy regenerator through pipelines, the outlet of the No. 2 vacuum buffer tank is connected with the inlet of the No. 2 vacuum pump through a pipeline, and the outlet of the No. 2 vacuum pump is connected with the inlet of the waste gas buffer tank through a pipeline; the import of No. 3 vacuum buffer tank passes through the pipeline and is connected with the gas vent of No. 1 condenser, No. 2 condenser, No. 3 condenser, No. 4 condenser respectively, and the export of No. 3 vacuum buffer tank passes through the pipe and the access connection of No. 3 vacuum pump, and the access connection of No. 3 vacuum pump passes through the pipeline and condenser once more. The vacuum-pumping system can ensure that the waste mineral oil treatment system is in a closed negative pressure state, materials do not directly contact with a heat source, open fire and secondary pollution are avoided, safety and reliability are realized, and the quality of byproducts is stable, so that the waste mineral oil treatment system is more advanced and more intelligent compared with other processes.
Furthermore, the energy regenerator No. 1, the energy regenerator No. 2, the energy regenerator No. 3 and the energy regenerator No. 4 are high-frequency electromagnetic heating devices, each high-frequency electromagnetic heating device comprises a stirring tank and an electromagnetic controller, the middle part and the lower part of the stirring tank are respectively wound with a vortex heating coil, a vortex heating coil is distributed at the bottom close to the stirring tank, and the electromagnetic controller is connected with the vortex heating coils; and a stirrer is obliquely arranged in the stirring tank. The electromagnetic controller rectifies alternating current of 220V and 50/60HZ into direct current, converts the direct current into high-frequency high-voltage electricity with the frequency of 20-40 KHZ, or converts three-phase alternating current of 380V 50/60HZ into direct current, converts the direct current into high-frequency low-voltage high-current electricity with the frequency of 10-30 KHZ, and respectively sends the high-frequency high-voltage electricity to each eddy current heating coil, the high-speed high-frequency high-voltage electricity flowing through the coils can generate an alternating magnetic field with high speed change, when the ferrous container is placed on the upper surface, the surface of the container can cut alternating magnetic lines of force to generate alternating current (namely eddy current) on the metal part at the bottom of the container, the eddy current enables current carriers at the bottom of the container to move randomly at high speed, and the current carriers collide.
Further, the preconditioner may use a three-phase separation horizontal decanter centrifuge.
The application method of the waste mineral oil treatment system comprises the following steps:
(1) sending the waste mineral oil into a pretreatment machine for three-phase separation to respectively obtain waste oil, oil residue A and waste water, sending the waste oil into a No. 1 energy regenerator for disposal by using a gear oil pump, sending the collected oil residue A to a No. 4 energy regenerator for disposal, and sending the waste water into a waste emulsion disposal system by using a lifting pump;
(2) the method comprises the following steps that a No. 1 energy regenerator heats waste oil, the temperature is controlled to be 100-170 ℃, light components in the waste oil enter a primary distillation tower through a pipeline to be evaporated, then the light oil containing trace moisture is obtained after condensation of a No. 1 condenser, a No. 1 receiving tank is used for collecting the light oil, then the light oil is sent to an oil-water separator to be separated to obtain the light oil without water, and the light oil is sent to a No. 1 finished product tank to be collected; the wastewater separated by the oil-water separator is sent to a waste emulsion disposal system;
(3) sending the waste oil left in the energy regenerator No. 1 to an energy regenerator No. 2 and/or an energy regenerator No. 3 for heating treatment, controlling the temperature at 180-320 ℃, rectifying the gas generated in the energy regenerator No. 2 and/or the energy regenerator No. 3 in a corresponding rectifying tower, condensing the gas by a condenser to obtain medium oil, collecting the medium oil in a receiving tank No. 2 and/or a receiving tank No. 3, sending the medium oil into a clay stirring tank for mixing and stirring with clay, sending the mixture in the clay stirring tank to an oil residue separator for separation to obtain base oil, sending the base oil into a finished product tank No. 2 for collection, and sending the separated oil residue B to an energy regenerator No. 4 for treatment; the residual heavy oil in the No. 2 energy regenerator and/or the No. 3 energy regenerator is sent to a No. 4 energy regenerator for disposal;
(4) and (2) heating the waste heavy oil and the oil residue B obtained in the step (3) and the oil residue A obtained by separating the pre-processor in the step (1) by using the No. 4 energy regenerator, controlling the temperature at 320-380 ℃, enabling mixed gas and dust generated by the No. 4 energy regenerator to enter a gas and dust separation tower, rectifying the gas obtained after separation and dust removal in a No. 4 rectifying tower, condensing the heavy oil in a No. 4 condenser to obtain the heavy oil, collecting the heavy oil in a No. 4 receiving tank, sending the heavy oil into a No. 3 finished product tank by using a gear oil pump, cooling the residual ash in the No. 4 energy regenerator, and discharging the residual ash by using a screw conveyor.
Further, the adding amount of the argil in the step (3) is 5 percent of the weight of the medium oil.
Further, the non-condensable gas in the No. 1-4 condenser enters a secondary condenser to be forcibly condensed at the temperature of-4 ℃ to obtain condensed oil, and then the condensed oil is sent to a No. 4 receiving tank to be collected; and sending the uncondensed gas in the secondary condenser to an exhaust gas treatment system for treatment.
Compared with the prior art, the technical scheme has the following beneficial effects:
1. the invention adopts a preprocessor to carry out three-phase separation on the waste mineral oil to obtain waste oil, waste water and oil residue A, and then uses a No. 1 energy regenerator, a No. 2 energy regenerator and/or a No. 3 energy regenerator and a rectifying and condensing device corresponding to the energy regenerators to separate and purify light oil and medium oil in the waste oil, so as to obtain high-purity and good-quality light oil and medium oil; the invention uses the No. 4 energy regenerator to heat the oil residue generated by the preprocessor and the oil residue separator and the heavy components in the waste oil, and then the heavy oil with high purity and good quality can be obtained after passing through the gas-dust separation tower and the condenser, thereby realizing the recycling of the waste mineral oil, separating and purifying the recycled mineral oil according to the light oil, the medium oil and the heavy oil, being beneficial to applying the recycled oil in different fields and improving the application range and the utilization efficiency of the recycled oil.
2. The waste mineral oil treatment system does not use an extracting agent to extract waste oil, so that the production cost is reduced, and the pollution of the extracting agent to the environment is avoided; waste mineral oil processing system easy operation can continuous type production or intermittent type formula production, is aided with exhaust treatment system, evacuation system and waste emulsion processing system, can realize whole equipment device's airtight negative pressure state, makes the material not direct contact heat source, and no naked light, no secondary pollution, safe and reliable, byproduct steady quality compares in other technologies more advanced, more intelligent.
3. Aiming at the characteristics of various oil components in the waste mineral oil, the application method of the waste mineral oil treatment system provided by the invention has the advantages that the heating temperature of each energy regenerator is controlled, so that oil products with different boiling points are separated in the energy regenerators, and a single oil component with high purity and high quality is obtained after rectification in a rectifying tower and condensation in a condenser; meanwhile, the mineral oil is refined by mixing clay according to a certain proportion, so that impurities are removed, and the purity of the oil product is improved.
4. The waste gas generated by treating the waste mineral oil by the invention is discharged after harmful substances in the waste gas are treated by the UV photolysis purifier and the two-stage adsorption tower, the generated waste water can be sent to a waste emulsion treatment system for harmless treatment, the waste residue generated by the No. 4 energy regenerator is detected according to four dangerous waste identification standards of GB5085.1-2007, GB5085.2-2007, GB5085.3-2007 and GB5085.6-2007, and the waste residue does not belong to dangerous waste, so that the harmless treatment of the waste residue is realized.
Drawings
FIG. 1 is a process flow diagram of the waste mineral oil treatment system described in example 1.
FIG. 2 is a process flow diagram of the evacuation system described in this example 1.
FIG. 3 is a process flow diagram of the waste mineral oil treatment system described in example 2.
FIG. 4 is a process flow diagram of an exhaust treatment system according to the present invention.
FIG. 5 is a schematic view showing the structure of a high-frequency electromagnetic heating apparatus according to the present invention
Reference numerals: 1-stirring tank, 2-stirrer, 3-eddy heating coil and 4-electromagnetic controller.
Detailed Description
The invention is further illustrated by the following examples, which are not to be construed as limiting the invention thereto. The specific experimental conditions and methods not indicated in the following examples are generally conventional means well known to those skilled in the art.
Example 1:
as shown in fig. 1, a waste mineral oil treatment system includes a pre-processor for separating waste mineral oil into wastewater, waste oil, and oil sludge; the wastewater is conveyed to a waste emulsion disposal system through a lifting pump; the oil residue is collected and then sent to a No. 4 energy regenerator for disposal; the waste oil is conveyed to a No. 1 energy regenerator through a gear oil pump, light components generated by the No. 1 energy regenerator are conveyed to a primary distillation tower through a pipeline, an outlet at the top of the primary distillation tower is connected to an inlet of a No. 1 condenser through a pipeline, an outlet of the No. 1 condenser is connected to an inlet of a No. 1 receiving tank through a pipeline, an outlet of the No. 1 receiving tank is connected to an inlet of an oil-water separator through a pipeline, a water phase outlet of the oil-water separator is connected to a waste emulsion disposal system through a pipeline, and an oil phase outlet of the oil-water separator is connected to a No. 1 finished product tank through a pipeline; the heavy component of the No. 1 energy regenerator is conveyed to the No. 2 energy regenerator through a pipeline, gas generated by the No. 2 energy regenerator is conveyed to the No. 2 rectifying tower through a pipeline, the outlet at the top of the No. 2 rectifying tower is connected to the inlet of a No. 2 condenser through a pipeline, the outlet of the No. 2 condenser is connected to the inlet of a No. 2 receiving tank through a pipeline, the outlet of the No. 2 receiving tank is connected to the inlet of a clay stirring tank through a pipeline, the outlet of the clay stirring tank is connected to an oil residue separator through a pipeline, the oil phase outlet of the oil residue separator is connected to a No. 2 finished product tank through a pipeline, and oil residue separated by the oil residue separator is conveyed to the No. 4 energy regenerator for disposal; the mixed gas and dust generated by the No. 4 energy regenerator enters a gas and dust separation tower through a pipeline, the gas separated by the gas and dust separation tower enters a No. 4 condenser through a pipeline, the outlet of the No. 4 condenser is connected to the inlet of a No. 4 receiving tank through a pipeline, and the heavy oil collected by the No. 4 receiving tank is conveyed to a No. 3 finished product tank through a gear oil pump; the exhaust ports of the No. 1 condenser, the No. 2 condenser and the No. 4 condenser are respectively connected to the inlet of the secondary condenser through pipelines, the outlet of the secondary condenser is connected to the No. 4 receiving tank through a pipeline, and the exhaust port of the secondary condenser is connected to a waste gas treatment system through a pipeline; the preprocessor may use a three-phase separation horizontal decanter centrifuge;
the waste mineral oil treatment system also comprises a No. 3 energy regenerator, heavy components of the No. 1 energy regenerator are conveyed to the No. 3 energy regenerator through a pipeline, gas generated by the No. 3 energy regenerator is conveyed to a No. 3 rectifying tower through a pipeline, an outlet at the top of the No. 3 rectifying tower is connected to an inlet of a No. 3 condenser through a pipeline, an outlet of the No. 3 condenser is connected to an inlet of a No. 3 receiving tank through a pipeline, and an outlet of the No. 3 receiving tank is connected to an inlet of a clay stirring tank through a pipeline; the exhaust port of the No. 3 condenser is connected to the inlet of the secondary condenser through a pipeline;
as shown in fig. 4, the waste gas treatment system includes a waste gas buffer tank, a vacuum pump No. 1, a UV photolysis purifier, a primary adsorption tower, a secondary adsorption tower, and an exhaust pipe; an inlet of the waste gas buffer tank is connected with an outlet of the secondary condenser through a pipeline, an outlet of the waste gas buffer tank is connected with an inlet of a No. 1 vacuum pump through a pipeline, an outlet of the No. 1 vacuum pump is connected with an inlet of the UV photolysis purifier through a pipeline, an outlet of the UV photolysis purifier is connected with an inlet of the first-stage adsorption tower through a pipeline, an inlet of the first-stage adsorption tower is connected with an inlet of the second-stage adsorption tower through a pipeline, an outlet of the second-stage adsorption tower is connected with an outer discharge pipe, and the height of the outlet of the outer discharge pipe is larger than 15 m;
as shown in fig. 2, the waste mineral oil treatment system further comprises a vacuum pumping system, wherein the vacuum pumping system comprises a No. 2 vacuum pump, a No. 2 vacuum buffer tank, a No. 3 vacuum pump and a No. 3 vacuum buffer tank; the inlet of the No. 2 vacuum buffer tank is respectively communicated with the tops of the No. 2 energy regenerator, the No. 3 energy regenerator and the No. 4 energy regenerator through pipelines, the outlet of the No. 2 vacuum buffer tank is connected with the inlet of the No. 2 vacuum pump through a pipeline, and the outlet of the No. 2 vacuum pump is connected with the inlet of the waste gas buffer tank through a pipeline; the inlet of the No. 3 vacuum buffer tank is respectively connected with the exhaust ports of the No. 1 condenser, the No. 2 condenser, the No. 3 condenser and the No. 4 condenser through pipelines, the outlet of the No. 3 vacuum buffer tank is connected with the inlet of the No. 3 vacuum pump through a pipeline, and the outlet of the No. 3 vacuum pump is connected with the inlet of the secondary condenser through a pipeline;
the waste mineral oil treatment system also comprises a feeding trough, the feeding trough is used for collecting oil residues from the pre-processor and the oil residue separator, and an outlet of the feeding trough is connected to an inlet of a No. 4 energy regenerator through a pipeline;
as shown in fig. 5, the energy regenerator No. 1, the energy regenerator No. 2, the energy regenerator No. 3 and the energy regenerator No. 4 are high-frequency electromagnetic heating devices, each high-frequency electromagnetic heating device comprises a stirring tank 1 and an electromagnetic controller 4, the middle part and the lower part of the stirring tank 1 are respectively wound with a vortex heating coil 3, a vortex heating coil 3 is distributed at the bottom close to the stirring tank 1, and the electromagnetic controller 4 is connected with the vortex heating coil 3; the agitator 2 is obliquely arranged in the agitator tank 1.
The application method of the waste mineral oil treatment system comprises the following steps:
(1) sending the waste mineral oil into a pretreatment machine for three-phase separation to respectively obtain waste oil, oil residue A and waste water, sending the waste oil into a No. 1 energy regenerator for disposal by using a gear oil pump, sending the collected oil residue A to a No. 4 energy regenerator for disposal, and sending the waste water into a waste emulsion disposal system by using a lifting pump;
(2) the No. 1 energy regenerator heats the waste oil, the temperature is controlled at 140 ℃, light components in the waste oil enter a primary distillation tower through a pipeline for evaporation, then the light oil containing trace moisture is obtained after condensation by a No. 1 condenser, the No. 1 receiving tank is used for collecting the light oil, then the light oil is sent to an oil-water separator for separation to obtain the light oil without water, and the light oil is sent to a No. 1 finished product tank for collection; the wastewater separated by the oil-water separator is sent to a waste emulsion disposal system;
(3) sending the waste oil left in the energy regenerator No. 1 to an energy regenerator No. 2 and an energy regenerator No. 3 for heating treatment, controlling the temperature at 250 ℃, rectifying the gas generated in the energy regenerator No. 2 and the energy regenerator No. 3 in a corresponding rectifying tower, condensing the gas by a condenser to obtain medium oil, collecting the medium oil in a receiving tank No. 2 and a receiving tank No. 3, sending the medium oil into a clay stirring tank to mix and stir the medium oil with clay, wherein the adding amount of the clay is 5 percent of the weight of the medium oil, sending the mixture in the clay stirring tank to an oil residue separator for separation to obtain base oil, sending the base oil into a finished product tank No. 2 for collection, and sending the oil residue B obtained by separation to an energy regenerator No. 4 for treatment; the waste heavy oil left in the No. 2 energy regenerator and the No. 3 energy regenerator is sent to a No. 4 energy regenerator for disposal;
(4) the No. 4 energy regenerator heats the waste heavy oil and the oil residue B obtained in the step (3) and the oil residue A obtained by the pre-processor in the step (1), the temperature is controlled at 350 ℃, the mixed gas dust generated by the No. 4 energy regenerator enters a gas-dust separation tower, the gas obtained after separation and dust removal enters a No. 4 rectifying tower for rectification, then the heavy oil obtained after condensation by a No. 4 condenser is collected in a No. 4 receiving tank, the heavy oil is sent into a No. 3 finished product tank by a gear oil pump, the residual ash in the No. 4 energy regenerator is cooled and then discharged by a screw conveyor; the non-condensable gas of the No. 1-4 condenser enters a secondary condenser to be forcibly condensed at the temperature of minus 4 ℃ to obtain condensed oil, and then the condensed oil is sent to a No. 4 receiving tank to be collected; and sending the uncondensed gas in the secondary condenser to an exhaust gas treatment system for treatment.
The waste mineral oil treatment system is applied to treat waste mineral oil, the obtained waste residues are orally taken by young white rats according to the method of GB5085.2-2007 acute toxicity primary screening Standard for identification of hazardous waste, the death number of the young white rats is 0, and the LD of the young white rats and the male white rats is female LD and male LD50Are all made of>2000mg/kg · bw, judged not to be a hazardous waste.
Example 2:
as shown in fig. 3, a waste mineral oil treatment system includes a pre-processor for separating waste mineral oil into wastewater, waste oil, and oil sludge; the wastewater is conveyed to a waste emulsion disposal system through a lifting pump; the oil residue is collected and then sent to a No. 4 energy regenerator for disposal; the waste oil is conveyed to a No. 1 energy regenerator through a gear oil pump, light components generated by the No. 1 energy regenerator are conveyed to a primary distillation tower through a pipeline, an outlet at the top of the primary distillation tower is connected to an inlet of a No. 1 condenser through a pipeline, an outlet of the No. 1 condenser is connected to an inlet of a No. 1 receiving tank through a pipeline, an outlet of the No. 1 receiving tank is connected to an inlet of an oil-water separator through a pipeline, a water phase outlet of the oil-water separator is connected to a waste emulsion disposal system through a pipeline, and an oil phase outlet of the oil-water separator is connected to a No. 1 finished product tank through a pipeline; the heavy component of the No. 1 energy regenerator is conveyed to the No. 2 energy regenerator through a pipeline, gas generated by the No. 2 energy regenerator is conveyed to the No. 2 rectifying tower through a pipeline, the outlet at the top of the No. 2 rectifying tower is connected to the inlet of a No. 2 condenser through a pipeline, the outlet of the No. 2 condenser is connected to the inlet of a No. 2 receiving tank through a pipeline, the outlet of the No. 2 receiving tank is connected to the inlet of a clay stirring tank through a pipeline, the outlet of the clay stirring tank is connected to an oil residue separator through a pipeline, the oil phase outlet of the oil residue separator is connected to a No. 2 finished product tank through a pipeline, and oil residue separated by the oil residue separator is conveyed to the No. 4 energy regenerator for disposal; the mixed gas and dust generated by the No. 4 energy regenerator enters a gas and dust separation tower through a pipeline, the gas separated by the gas and dust separation tower enters a No. 4 condenser through a pipeline, the outlet of the No. 4 condenser is connected to the inlet of a No. 4 receiving tank through a pipeline, and the heavy oil collected by the No. 4 receiving tank is conveyed to a No. 3 finished product tank through a gear oil pump; the exhaust ports of the No. 1 condenser, the No. 2 condenser and the No. 4 condenser are respectively connected to the inlet of the secondary condenser through pipelines, the outlet of the secondary condenser is connected to the No. 4 receiving tank through a pipeline, and the exhaust port of the secondary condenser is connected to a waste gas treatment system through a pipeline; the preprocessor may use a three-phase separation horizontal decanter centrifuge;
as shown in fig. 4, the waste gas treatment system includes a waste gas buffer tank, a vacuum pump No. 1, a UV photolysis purifier, a primary adsorption tower, a secondary adsorption tower, and an exhaust pipe; an inlet of the waste gas buffer tank is connected with an outlet of the secondary condenser through a pipeline, an outlet of the waste gas buffer tank is connected with an inlet of a No. 1 vacuum pump through a pipeline, an outlet of the No. 1 vacuum pump is connected with an inlet of the UV photolysis purifier through a pipeline, an outlet of the UV photolysis purifier is connected with an inlet of the first-stage adsorption tower through a pipeline, an inlet of the first-stage adsorption tower is connected with an inlet of the second-stage adsorption tower through a pipeline, an outlet of the second-stage adsorption tower is connected with an outer discharge pipe, and the height of the outlet of the outer discharge pipe is larger than 15 m;
the waste mineral oil treatment system also comprises a vacuum pumping system, wherein the vacuum pumping system comprises a No. 2 vacuum pump, a No. 2 vacuum buffer tank, a No. 3 vacuum pump and a No. 3 vacuum buffer tank; the inlet of the No. 2 vacuum buffer tank is respectively communicated with the tops of the No. 2 energy regenerator and the No. 4 energy regenerator through pipelines, the outlet of the No. 2 vacuum buffer tank is connected with the inlet of the No. 2 vacuum pump through a pipeline, and the outlet of the No. 2 vacuum pump is connected with the inlet of the waste gas buffer tank through a pipeline; the inlet of the No. 3 vacuum buffer tank is respectively connected with the exhaust ports of the No. 1 condenser, the No. 2 condenser and the No. 4 condenser through pipelines, the outlet of the No. 3 vacuum buffer tank is connected with the inlet of the No. 3 vacuum pump through a pipeline, and the outlet of the No. 3 vacuum pump is connected with the inlet of the secondary condenser through a pipeline;
the waste mineral oil treatment system also comprises a feeding trough, the feeding trough is used for collecting oil residues from the pre-processor and the oil residue separator, and an outlet of the feeding trough is connected to an inlet of a No. 4 energy regenerator through a pipeline;
as shown in fig. 5, the energy regenerator No. 1, the energy regenerator No. 2 and the energy regenerator No. 4 are high-frequency electromagnetic heating devices, each high-frequency electromagnetic heating device comprises a stirring tank 1 and an electromagnetic controller 4, the middle part and the lower part of the stirring tank 1 are respectively wound with a eddy current heating coil 3, the eddy current heating coil 3 is distributed at the bottom close to the stirring tank 1, and the electromagnetic controller 4 is connected with the eddy current heating coil 3; the agitator 2 is obliquely arranged in the agitator tank 1.
The application method of the waste mineral oil treatment system comprises the following steps:
(1) sending the waste mineral oil into a pretreatment machine for three-phase separation to respectively obtain waste oil, oil residue A and waste water, sending the waste oil into a No. 1 energy regenerator for disposal by using a gear oil pump, sending the collected oil residue A to a No. 4 energy regenerator for disposal, and sending the waste water into a waste emulsion disposal system by using a lifting pump;
(2) the No. 1 energy regenerator heats the waste oil, the temperature is controlled at 100 ℃, light components in the waste oil enter a primary distillation tower through a pipeline for evaporation, then the light oil containing trace moisture is obtained after condensation by a No. 1 condenser, the No. 1 receiving tank is used for collecting the light oil, then the light oil is sent to an oil-water separator for separation to obtain the light oil without water, and the light oil is sent to a No. 1 finished product tank for collection; the wastewater separated by the oil-water separator is sent to a waste emulsion disposal system;
(3) sending the waste oil left in the energy regenerator No. 1 to an energy regenerator No. 2 for heating treatment, controlling the temperature at 180 ℃, sending the gas generated in the energy regenerator No. 2 into a corresponding rectifying tower for rectification, then condensing the gas by a condenser to obtain medium oil, collecting the medium oil in a receiving tank No. 2, sending the medium oil into a clay stirring tank for mixing and stirring with clay, wherein the adding amount of the clay is 5 percent of the weight of the medium oil, then sending the mixture in the clay stirring tank to an oil residue separator for separation to obtain base oil, sending the base oil into a finished product tank No. 2 for collection, and sending the oil residue B obtained by separation to an energy regenerator No. 4 for treatment; the residual heavy oil in the No. 2 energy regenerator is sent to a No. 4 energy regenerator for disposal;
(4) the No. 4 energy regenerator heats the waste heavy oil and the oil residue B obtained in the step (3) and the oil residue A obtained by the separation of the preprocessor in the step (1), the temperature is controlled at 320 ℃, the mixed gas dust generated by the No. 4 energy regenerator enters a gas-dust separation tower, the gas obtained after separation and dust removal enters a No. 4 rectifying tower for rectification, then the heavy oil obtained after condensation of a No. 4 condenser is collected in a No. 4 receiving tank, the heavy oil is sent into a No. 3 finished product tank by a gear oil pump, the residual ash residue in the No. 4 energy regenerator is cooled and then discharged by a screw conveyor; : the non-condensable gas of the No. 1-4 condenser enters a secondary condenser to be forcibly condensed at the temperature of minus 4 ℃ to obtain condensed oil, and then the condensed oil is sent to a No. 4 receiving tank to be collected; and sending the uncondensed gas in the secondary condenser to an exhaust gas treatment system for treatment.
The waste mineral oil treatment system is applied to treat waste mineral oil, the obtained waste residues are orally taken by young white rats according to the method of GB5085.2-2007 acute toxicity primary screening Standard for identification of hazardous waste, the death number of the young white rats is 0, and the LD of the young white rats and the male white rats is female LD and male LD50Are all made of>2000mg/kg · bw, judged not to be a hazardous waste.
Example 3:
a waste mineral oil treatment system comprising a preconditioner for separating waste mineral oil into wastewater, waste oil and oil sludge; the wastewater is conveyed to a waste emulsion disposal system through a lifting pump; the oil residue is collected and then sent to a No. 4 energy regenerator for disposal; the waste oil is conveyed to a No. 1 energy regenerator through a gear oil pump, light components generated by the No. 1 energy regenerator are conveyed to a primary distillation tower through a pipeline, an outlet at the top of the primary distillation tower is connected to an inlet of a No. 1 condenser through a pipeline, an outlet of the No. 1 condenser is connected to an inlet of a No. 1 receiving tank through a pipeline, an outlet of the No. 1 receiving tank is connected to an inlet of an oil-water separator through a pipeline, a water phase outlet of the oil-water separator is connected to a waste emulsion disposal system through a pipeline, and an oil phase outlet of the oil-water separator is connected to a No. 1 finished product tank through a pipeline; the heavy component of the No. 1 energy regenerator is conveyed to the No. 2 energy regenerator through a pipeline, gas generated by the No. 2 energy regenerator is conveyed to the No. 2 rectifying tower through a pipeline, the outlet at the top of the No. 2 rectifying tower is connected to the inlet of a No. 2 condenser through a pipeline, the outlet of the No. 2 condenser is connected to the inlet of a No. 2 receiving tank through a pipeline, the outlet of the No. 2 receiving tank is connected to the inlet of a clay stirring tank through a pipeline, the outlet of the clay stirring tank is connected to an oil residue separator through a pipeline, the oil phase outlet of the oil residue separator is connected to a No. 2 finished product tank through a pipeline, and oil residue separated by the oil residue separator is conveyed to the No. 4 energy regenerator for disposal; the mixed gas and dust generated by the No. 4 energy regenerator enters a gas and dust separation tower through a pipeline, the gas separated by the gas and dust separation tower enters a No. 4 condenser through a pipeline, the outlet of the No. 4 condenser is connected to the inlet of a No. 4 receiving tank through a pipeline, and the heavy oil collected by the No. 4 receiving tank is conveyed to a No. 3 finished product tank through a gear oil pump; the exhaust ports of the No. 1 condenser, the No. 2 condenser and the No. 4 condenser are respectively connected to the inlet of the secondary condenser through pipelines, the outlet of the secondary condenser is connected to the No. 4 receiving tank through a pipeline, and the exhaust port of the secondary condenser is connected to a waste gas treatment system through a pipeline; the preprocessor may use a three-phase separation horizontal decanter centrifuge;
the waste mineral oil treatment system also comprises a No. 3 energy regenerator, heavy components of the No. 1 energy regenerator are conveyed to the No. 3 energy regenerator through a pipeline, gas generated by the No. 3 energy regenerator is conveyed to a No. 3 rectifying tower through a pipeline, an outlet at the top of the No. 3 rectifying tower is connected to an inlet of a No. 3 condenser through a pipeline, an outlet of the No. 3 condenser is connected to an inlet of a No. 3 receiving tank through a pipeline, and an outlet of the No. 3 receiving tank is connected to an inlet of a clay stirring tank through a pipeline; the exhaust port of the No. 3 condenser is connected to the inlet of the secondary condenser through a pipeline;
as shown in fig. 4, the waste gas treatment system includes a waste gas buffer tank, a vacuum pump No. 1, a UV photolysis purifier, a primary adsorption tower, a secondary adsorption tower, and an exhaust pipe; an inlet of the waste gas buffer tank is connected with an outlet of the secondary condenser through a pipeline, an outlet of the waste gas buffer tank is connected with an inlet of a No. 1 vacuum pump through a pipeline, an outlet of the No. 1 vacuum pump is connected with an inlet of the UV photolysis purifier through a pipeline, an outlet of the UV photolysis purifier is connected with an inlet of the first-stage adsorption tower through a pipeline, an inlet of the first-stage adsorption tower is connected with an inlet of the second-stage adsorption tower through a pipeline, an outlet of the second-stage adsorption tower is connected with an outer discharge pipe, and the height of the outlet of the outer discharge pipe is larger than 15 m;
the waste mineral oil treatment system also comprises a vacuum pumping system, wherein the vacuum pumping system comprises a No. 2 vacuum pump, a No. 2 vacuum buffer tank, a No. 3 vacuum pump and a No. 3 vacuum buffer tank; the inlet of the No. 2 vacuum buffer tank is respectively communicated with the tops of the No. 2 energy regenerator, the No. 3 energy regenerator and the No. 4 energy regenerator through pipelines, the outlet of the No. 2 vacuum buffer tank is connected with the inlet of the No. 2 vacuum pump through a pipeline, and the outlet of the No. 2 vacuum pump is connected with the inlet of the waste gas buffer tank through a pipeline; the inlet of the No. 3 vacuum buffer tank is respectively connected with the exhaust ports of the No. 1 condenser, the No. 2 condenser, the No. 3 condenser and the No. 4 condenser through pipelines, the outlet of the No. 3 vacuum buffer tank is connected with the inlet of the No. 3 vacuum pump through a pipeline, and the outlet of the No. 3 vacuum pump is connected with the inlet of the secondary condenser through a pipeline;
the waste mineral oil treatment system also comprises a feeding trough, the feeding trough is used for collecting oil residues from the pre-processor and the oil residue separator, and an outlet of the feeding trough is connected to an inlet of a No. 4 energy regenerator through a pipeline;
as shown in fig. 5, the energy regenerator No. 1, the energy regenerator No. 2, the energy regenerator No. 3 and the energy regenerator No. 4 are high-frequency electromagnetic heating devices, each high-frequency electromagnetic heating device comprises a stirring tank 1 and an electromagnetic controller 4, the middle part and the lower part of the stirring tank 1 are respectively wound with a vortex heating coil 3, a vortex heating coil 3 is distributed at the bottom close to the stirring tank 1, and the electromagnetic controller 4 is connected with the vortex heating coil 3; the agitator 2 is obliquely arranged in the agitator tank 1.
The application method of the waste mineral oil treatment system comprises the following steps:
(1) sending the waste mineral oil into a pretreatment machine for three-phase separation to respectively obtain waste oil, oil residue A and waste water, sending the waste oil into a No. 1 energy regenerator for disposal by using a gear oil pump, sending the collected oil residue A to a No. 4 energy regenerator for disposal, and sending the waste water into a waste emulsion disposal system by using a lifting pump;
(2) the No. 1 energy regenerator heats the waste oil, the temperature is controlled at 170 ℃, light components in the waste oil enter a primary distillation tower through a pipeline for evaporation, then the light oil containing trace moisture is obtained after condensation by a No. 1 condenser, the No. 1 receiving tank is used for collecting the light oil, then the light oil is sent to an oil-water separator for separation to obtain the light oil without water, and the light oil is sent to a No. 1 finished product tank for collection; the wastewater separated by the oil-water separator is sent to a waste emulsion disposal system;
(3) sending the waste oil left in the energy regenerator No. 1 to an energy regenerator No. 2 and an energy regenerator No. 3 for heating treatment, controlling the temperature at 320 ℃, rectifying the gas generated in the energy regenerator No. 2 and the energy regenerator No. 3 in a corresponding rectifying tower, condensing the gas by a condenser to obtain medium oil, collecting the medium oil in a receiving tank No. 2 and a receiving tank No. 3, sending the medium oil into a clay stirring tank to mix and stir with clay, wherein the adding amount of the clay is 5 percent of the weight of the medium oil, sending the mixture in the clay stirring tank to an oil residue separator for separation to obtain base oil, sending the base oil into a finished product tank No. 2 for collection, and sending the oil residue B obtained by separation to an energy regenerator No. 4 for treatment; the waste heavy oil left in the No. 2 energy regenerator and the No. 3 energy regenerator is sent to a No. 4 energy regenerator for disposal;
(4) the No. 4 energy regenerator heats the waste heavy oil and the oil residue B obtained in the step (3) and the oil residue A obtained by the pre-processor in the step (1), the temperature is controlled at 380 ℃, the mixed gas dust generated by the No. 4 energy regenerator enters a gas-dust separation tower, the gas obtained after separation and dust removal enters a No. 4 rectifying tower for rectification, then the heavy oil obtained after condensation by a No. 4 condenser is collected in a No. 4 receiving tank, the heavy oil is sent into a No. 3 finished product tank by a gear oil pump, the residual ash in the No. 4 energy regenerator is cooled and then discharged by a screw conveyor; the non-condensable gas of the No. 1-4 condenser enters a secondary condenser to be forcibly condensed at the temperature of minus 4 ℃ to obtain condensed oil, and then the condensed oil is sent to a No. 4 receiving tank to be collected; and sending the uncondensed gas in the secondary condenser to an exhaust gas treatment system for treatment.
The waste mineral oil treatment system is applied to treat waste mineral oil, the obtained waste residues are orally taken by young white rats according to the method of GB5085.2-2007 acute toxicity primary screening Standard for identification of hazardous waste, the death number of the young white rats is 0, and the LD of the young white rats and the male white rats is female LD and male LD50Are all made of>2000mg/kg · bw, judged not to be a hazardous waste.
Experimental example:
the waste mineral oil treatment systems in embodiments 1 to 3 are respectively applied to treat waste mineral oil, the obtained waste residues are detected according to the method in GB5085.1-2007 Standard for hazardous waste identification corrosivity identification to obtain corrosion rate and pH value, and the obtained waste residues are detected according to the methods in GB5085.3-2007 Standard for hazardous waste identification leaching toxicity identification and GB5085.6-2007 Standard for hazardous waste identification toxic substance content identification, and specific results are shown in Table 1.
TABLE 1 identification and detection results of dangerous waste of waste residues
The identification and detection results of the hazardous waste containing the waste residues can be seen, and the waste residues generated by the waste mineral oil treatment system are not hazardous waste and do not harm human bodies and the environment.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (9)
1. A waste mineral oil processing system which characterized in that: the pretreatment device comprises a pretreatment device, a pretreatment device and a control device, wherein the pretreatment device is used for separating waste mineral oil into waste water, waste oil and oil residue; the wastewater is conveyed to a waste emulsion disposal system through a lifting pump; the oil residue is collected and then sent to a No. 4 energy regenerator for disposal; the waste oil is conveyed to a No. 1 energy regenerator through a gear oil pump, light components generated by the No. 1 energy regenerator are conveyed to a primary distillation tower through a pipeline, an outlet at the top of the primary distillation tower is connected to an inlet of a No. 1 condenser through a pipeline, an outlet of the No. 1 condenser is connected to an inlet of a No. 1 receiving tank through a pipeline, an outlet of the No. 1 receiving tank is connected to an inlet of an oil-water separator through a pipeline, a water phase outlet of the oil-water separator is connected to a waste emulsion disposal system through a pipeline, and an oil phase outlet of the oil-water separator is connected to a No. 1 finished product tank through a pipeline; the heavy component of the No. 1 energy regenerator is conveyed to the No. 2 energy regenerator through a pipeline, gas generated by the No. 2 energy regenerator is conveyed to the No. 2 rectifying tower through a pipeline, the outlet at the top of the No. 2 rectifying tower is connected to the inlet of a No. 2 condenser through a pipeline, the outlet of the No. 2 condenser is connected to the inlet of a No. 2 receiving tank through a pipeline, the outlet of the No. 2 receiving tank is connected to the inlet of a clay stirring tank through a pipeline, the outlet of the clay stirring tank is connected to an oil residue separator through a pipeline, the oil phase outlet of the oil residue separator is connected to a No. 2 finished product tank through a pipeline, and oil residue separated by the oil residue separator is conveyed to the No. 4 energy regenerator for disposal; the mixed gas and dust generated by the No. 4 energy regenerator enters a gas and dust separation tower through a pipeline, the gas separated by the gas and dust separation tower enters a No. 4 condenser through a pipeline, the outlet of the No. 4 condenser is connected to the inlet of a No. 4 receiving tank through a pipeline, and the heavy oil collected by the No. 4 receiving tank is conveyed to a No. 3 finished product tank through a gear oil pump; no. 1 condenser, No. 2 condenser and No. 4 condenser's gas vent is respectively through the import of pipe connection to condenser again, and the export of condenser is through pipe connection to No. 4 receiving tank again, and the gas vent of condenser is through pipe connection to exhaust-gas treatment system again.
2. The waste mineral oil processing system of claim 1, wherein: the waste mineral oil treatment system also comprises a No. 3 energy regenerator, heavy components of the No. 1 energy regenerator are conveyed to the No. 3 energy regenerator through a pipeline, gas generated by the No. 3 energy regenerator is conveyed to a No. 3 rectifying tower through a pipeline, an outlet at the top of the No. 3 rectifying tower is connected to an inlet of a No. 3 condenser through a pipeline, an outlet of the No. 3 condenser is connected to an inlet of a No. 3 receiving tank through a pipeline, and an outlet of the No. 3 receiving tank is connected to an inlet of a clay stirring tank through a pipeline; the exhaust port of the No. 3 condenser is connected to the inlet of the secondary condenser through a pipeline.
3. The waste mineral oil processing system of claim 1 or 2, wherein: the waste gas treatment system comprises a waste gas buffer tank, a No. 1 vacuum pump, a UV photolysis purifier, a primary adsorption tower, a secondary adsorption tower and an exhaust pipe; the import of exhaust buffer tank and the export of condenser once more pass through the pipe connection, the export of exhaust buffer tank passes through the access connection of pipeline and No. 1 vacuum pump, the exit of No. 1 vacuum pump passes through the access connection of pipeline and UV photodissociation clarifier, the exit of UV photodissociation clarifier passes through the access connection of pipeline and one-level adsorption tower, the import of one-level adsorption tower passes through the access connection of pipeline and second grade adsorption tower, the export and the outer pipe connection of arranging of second grade adsorption tower, the export height of outer calandria is greater than 15 m.
4. The waste mineral oil processing system of claim 3, wherein: the waste mineral oil treatment system also comprises a vacuum pumping system, wherein the vacuum pumping system comprises a No. 2 vacuum pump, a No. 2 vacuum buffer tank, a No. 3 vacuum pump and a No. 3 vacuum buffer tank; the inlet of the No. 2 vacuum buffer tank is respectively communicated with the tops of the No. 2 energy regenerator, the No. 3 energy regenerator and the No. 4 energy regenerator through pipelines, the outlet of the No. 2 vacuum buffer tank is connected with the inlet of the No. 2 vacuum pump through a pipeline, and the outlet of the No. 2 vacuum pump is connected with the inlet of the waste gas buffer tank through a pipeline; the import of No. 3 vacuum buffer tank passes through the pipeline and is connected with the gas vent of No. 1 condenser, No. 2 condenser, No. 3 condenser, No. 4 condenser respectively, and the export of No. 3 vacuum buffer tank passes through the pipe and the access connection of No. 3 vacuum pump, and the access connection of No. 3 vacuum pump passes through the pipeline and condenser once more.
5. The waste mineral oil processing system of claim 1, 2 or 4, wherein: the waste mineral oil treatment system also comprises a feeding trough, wherein the feeding trough is used for collecting oil residues from the pre-processor and the oil residue separator, and an outlet of the feeding trough is connected to an inlet of a No. 4 energy regenerator through a pipeline.
6. The waste mineral oil processing system of claim 5, wherein: the energy regenerator No. 1, the energy regenerator No. 2, the energy regenerator No. 3 and the energy regenerator No. 4 are high-frequency electromagnetic heating devices, each high-frequency electromagnetic heating device comprises a stirring tank (1) and an electromagnetic controller (4), the middle part and the lower part of each stirring tank (1) are respectively wound with a vortex heating coil (3), the bottom close to each stirring tank (1) is also provided with a vortex heating coil (3), and the electromagnetic controllers (4) are connected with the vortex heating coils (3); the stirrer (2) is obliquely arranged in the stirring tank (1).
7. A method of using the waste mineral oil processing system of claims 1 to 6, wherein: the method comprises the following steps:
(1) sending the waste mineral oil into a pretreatment machine for three-phase separation to respectively obtain waste oil, oil residue A and waste water, sending the waste oil into a No. 1 energy regenerator for disposal by using a gear oil pump, sending the collected oil residue A to a No. 4 energy regenerator for disposal, and sending the waste water into a waste emulsion disposal system by using a lifting pump;
(2) the method comprises the following steps that a No. 1 energy regenerator heats waste oil, the temperature is controlled to be 100-170 ℃, light components in the waste oil enter a primary distillation tower through a pipeline to be evaporated, then the light oil containing trace moisture is obtained after condensation of a No. 1 condenser, a No. 1 receiving tank is used for collecting the light oil, then the light oil is sent to an oil-water separator to be separated to obtain the light oil without water, and the light oil is sent to a No. 1 finished product tank to be collected; the wastewater separated by the oil-water separator is sent to a waste emulsion disposal system;
(3) sending the waste oil left in the energy regenerator No. 1 to an energy regenerator No. 2 and/or an energy regenerator No. 3 for heating treatment, controlling the temperature at 180-320 ℃, rectifying the gas generated in the energy regenerator No. 2 and/or the energy regenerator No. 3 in a corresponding rectifying tower, condensing the gas by a condenser to obtain medium oil, collecting the medium oil in a receiving tank No. 2 and/or a receiving tank No. 3, sending the medium oil into a clay stirring tank for mixing and stirring with clay, sending the mixture in the clay stirring tank to an oil residue separator for separation to obtain base oil, sending the base oil into a finished product tank No. 2 for collection, and sending the separated oil residue B to an energy regenerator No. 4 for treatment; the residual heavy oil in the No. 2 energy regenerator and/or the No. 3 energy regenerator is sent to a No. 4 energy regenerator for disposal;
(4) and (2) heating the waste heavy oil and the oil residue B obtained in the step (3) and the oil residue A obtained by separating the pre-processor in the step (1) by using the No. 4 energy regenerator, controlling the temperature at 320-380 ℃, enabling mixed gas and dust generated by the No. 4 energy regenerator to enter a gas and dust separation tower, rectifying the gas obtained after separation and dust removal in a No. 4 rectifying tower, condensing the heavy oil in a No. 4 condenser to obtain the heavy oil, collecting the heavy oil in a No. 4 receiving tank, sending the heavy oil into a No. 3 finished product tank by using a gear oil pump, cooling the residual ash in the No. 4 energy regenerator, and discharging the residual ash by using a screw conveyor.
8. The method of using a waste mineral oil processing system according to claim 7, wherein: in the step (3), the adding amount of the argil is 5 percent of the weight of the medium oil.
9. The method of using a waste mineral oil processing system according to claim 7, wherein: the non-condensable gas of the No. 1-4 condenser enters a secondary condenser to be forcibly condensed at the temperature of minus 4 ℃ to obtain condensed oil, and then the condensed oil is sent to a No. 4 receiving tank to be collected; and sending the uncondensed gas in the secondary condenser to an exhaust gas treatment system for treatment.
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