CN111117694A - Regeneration treatment system and process for waste mineral oil - Google Patents
Regeneration treatment system and process for waste mineral oil Download PDFInfo
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- CN111117694A CN111117694A CN201911288466.5A CN201911288466A CN111117694A CN 111117694 A CN111117694 A CN 111117694A CN 201911288466 A CN201911288466 A CN 201911288466A CN 111117694 A CN111117694 A CN 111117694A
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- 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
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- 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
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- 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
- C10G2400/00—Products obtained by processes covered by groups C10G9/00 - C10G69/14
- C10G2400/10—Lubricating oil
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- General Chemical & Material Sciences (AREA)
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- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
Abstract
The invention discloses a regeneration treatment system and a process of waste mineral oil, which comprises a primary oil tank, a slag discharge filter, a primary separating tank, a raw oil storage tank, a heating tank, a distillation tower, a primary cooling device, a secondary cooling device and a vacuum condenser, wherein the primary separating tank is connected with the heating tank; the treatment process comprises the following steps: inspecting in the field, filtering coarse substances, separating for the first time and the second time, heating and distilling, cooling and collecting, and decolorizing and refining. The method comprises the steps of filtering the waste mineral oil by coarse substances, cleaning out larger oil sludge, impurities and the like in the oil, standing and separating, removing most impurities and water components in the waste mineral oil, heating the waste oil into oil steam through heating and distillation, collecting crude oil after multi-stage cooling, and decolorizing and refining to obtain the finished base oil.
Description
Technical Field
The invention relates to the technical field of waste mineral oil treatment, in particular to a waste mineral oil regeneration treatment system and a waste mineral oil regeneration treatment process.
Background
The waste mineral oil is an extremely stable suspended emulsion system, contains a large amount of emulsified crude oil and suspended solid, and mainly comes from two processes: the method is from the crude oil exploitation process, oily waste generated in the crude oil exploitation process mainly comes from a ground treatment system, and oily waste generated in the oil extraction sewage treatment process generally has the characteristics of high oil content, high viscosity, fine particles, difficult dehydration and the like; secondly, the method is derived from the cleaning process of the oil product storage tank, when the oil product is stored in the oil product storage tank, a small amount of mechanical impurities, sand grains, soil, heavy metal salts, paraffin, asphalt and other heavy oily components in the oil product are deposited at the bottom of the oil tank to form a black and thick gelatinous substance layer, and the oil-containing waste at the bottom of the tank is characterized by extremely high hydrocarbon content.
In addition, the waste mineral oil mainly comes from the replacement oil and cleaning oil of equipment such as machinery, power, transportation and the like; waste oil generated in the metal rolling and machining processes; waste oil produced in the process of treating oily waste water; oil residues generated during oil processing and oil regeneration. Because the substances have low degradation speed and a large amount of toxic and harmful substances, the atmosphere, water sources and soil can be polluted by random disposal, the ecological environment is damaged, and the health and safety of human bodies are seriously threatened; as a country with shortage of petroleum resources, China develops the recycling of the renewable resources of waste mineral oil, can protect the environment and can create great economic and social benefits. At present, the treatment mode of the waste mineral oil is mainly a traditional incineration and landfill mode and adopts the traditional incineration and landfill mode to treat the waste mineral oil through scientific solvent refining, water washing, microemulsion washing, pyrolysis and biological treatment technologies, thereby not only causing the resource waste of the waste mineral oil, but also occupying a large amount of land and causing serious pollution to the environment; the waste mineral oil is treated by adopting the solvent refining, water washing and microemulsion washing technologies, the treatment effect is good, but the treatment amount is small and the treatment process is complex; 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 pyrolysis technology is adopted to treat the waste mineral oil, and although complete harmlessness can be realized, the treatment effect is poor and the cost is high.
Disclosure of Invention
The invention aims to provide a system and a process for regenerating and treating waste mineral oil, which can effectively solve the problems of high cost and poor treatment effect of the waste mineral oil in the treatment process.
In order to solve the technical problems, the invention adopts the following technical scheme:
a regeneration treatment system for waste mineral oil comprises a primary oil tank, a slag discharge filter, a primary separating tank, a raw oil storage tank, a heating tank, a distillation tower, a primary cooling device, a secondary cooling device and a vacuum condenser; the primary oil tank is connected with the slag discharging filter through an oil pump, the slag discharging filter is provided with an oil slag cleaning bin, the slag discharging filter is connected with a primary separating tank through the oil pump, the bottom of the primary separating tank is of a conical structure, the bottom of the primary separating tank is provided with a slag discharging port, the primary separating tank is connected onto a raw oil storage tank through the oil pump, an oil inlet of the raw oil storage tank is arranged at the lower part of the tank body, the raw oil storage tank is connected onto a heating tank through the oil pump, the bottom of the heating tank is provided with a combustion chamber, an outlet of the heating tank is connected at an inlet of a distillation tower through a pipeline, an oil-gas pipeline is arranged at an outlet of the distillation tower, the oil-gas pipeline is provided with a primary cooling device, the bottom of the distillation tower is connected onto an asphalt storage tank through a pipeline, the oil gas pipeline is connected with fuel oil crude oil tank and vacuum condenser through second grade cooling device, and vacuum condenser passes through the pipe connection on effluent treatment plant, base oil crude oil tank passes through oil pump connection on the decoloration tower, the decoloration tower bottom is provided with the waste residue discharge port, the decoloration tower passes through oil pump connection on automatic row sediment filter, automatic row sediment filter has on the base oil finished product jar through oil pump connection.
Preferably, the primary oil tank is provided as a conical tank and is installed in the leakage-proof tank pool.
Furthermore, a plurality of conical buffer tanks are arranged between the raw oil storage tank and the heating tank, and the conical buffer tanks are respectively communicated with the raw oil storage tank and the heating tank.
Preferably, the heating tank is arranged as a heating tank of a tube furnace system, the heating tank of the tube furnace system adopts a small-caliber furnace tube, and the temperature in the heating tank is kept at 270 ℃.
Furthermore, a water-gas separation device is connected to the vacuum condenser, a fuel gas collection device is connected to the water-gas separation device, an air supply pipe is arranged on the fuel gas collection device and connected with the combustion chamber, and a water-sealed flame arrester is arranged on the air supply pipe.
Furthermore, the automatic slag discharge filter is connected with a second heating furnace, the second heating furnace is connected with a combustion chamber, the upper part of the second heating furnace is connected onto a condenser through a pipeline, a second water-gas separation device is arranged on the condenser, and the second water-gas separation device is connected onto a fuel gas collection device through a pipeline.
Furthermore, the second heating furnace is connected to a decoloring tower through a sludge pump.
A treatment process of a waste mineral oil regeneration treatment system comprises the following steps,
s1, entrance inspection: after the waste mineral oil is transported into a factory by a closed tank car or a transport closed container vehicle, sampling detection is carried out firstly, the waste mineral oil can be transported into the factory after meeting the in-factory recovery standard, after the waste mineral oil is qualified by inspection, the waste mineral oil is stored in a primary oil tank, inspection wastewater generated in the inspection process is pumped into a sewage treatment station for treatment through a pipeline, and the primary oil tank is cleaned up oil sludge and impurities once a season;
s2, coarse filtration: pumping the waste mineral oil in the primary oil tank into an automatic slag discharge filter through an oil pump to separate coarse substances, filtering out larger oil sludge and impurities from the waste mineral oil, and finishing cleaning;
s3, primary separation: pumping the waste mineral oil after coarse filtration into a primary separation tank through an oil pump, naturally standing, settling for 12-24 hours, separating oil and water by utilizing the specific gravity difference of the oil, the water and the slag, wherein the oil component floats on the surface, the water component sinks at the bottom, then pumping the water by utilizing a self-sucking pump, then centrifugally homogenizing the oil component to obtain the waste mineral oil containing a small amount of water, pumping the waste mineral oil into a raw oil storage tank, opening the bottom of a tank body of the primary separation tank to discharge separated waste water and oil sludge, and pumping the waste water into a sewage treatment station through a pipeline pump for treatment;
s4, secondary separation: raw oil in a raw oil storage tank enters a conical buffer tank in batches, naturally stands, settles for 8 hours, and performs secondary separation on oil and water by utilizing the specific gravity difference of the oil, the water and the slag, so as to further remove a small amount of water and impurities in the raw oil, the bottom of the tank body is opened to separate oil-containing wastewater and oil sludge, and the oil-containing wastewater is pumped into a sewage treatment station through a pipeline for treatment;
s5, heating and distilling: pumping pretreated anhydrous waste oil into a heating tank for heating, keeping the temperature of the heating tank at 270 ℃, converting most of the waste oil from a liquid state into a gaseous state, then introducing oil vapor into a distillation tower, leading the temperature in the distillation tower to be 270 ℃ and the pressure to be 200pa, rapidly evaporating the waste oil introduced into a distiller to obtain gasified oil vapor, and leading heavy oil at the bottom of the distillation tower to be mainly asphalt and flow into an asphalt storage tank through a pipeline for storage;
s6, cooling and collecting: the gasified oil steam enters a primary cooling device, the gasified oil steam is cooled to be below 180 ℃ in an indirect water cooling mode to form liquid base oil, then the liquid base oil is pumped into a base oil crude oil tank, the uncondensed gasified oil steam enters a secondary cooling device, the gasified oil steam is cooled to be below 60 ℃ in an indirect water cooling mode to form liquid fuel oil, then the liquid fuel oil is pumped into a fuel oil crude oil tank, the uncondensed gasified oil steam passes through the secondary cooling device and then enters a vacuum condenser, a small amount of oil-containing gas is cooled in an indirect water cooling mode, the cooled gasified oil steam enters a water-gas separation device, the separated oil gas enters a fuel gas collection device for collection, and then the separated oil gas is introduced into a combustion chamber to be;
s7, decoloring and refining: pumping oil in a crude base oil tank into a decoloring tower through an oil pump, adding activated clay, heating to 110-120 ℃, stirring for 30 minutes to enable impurities in the crude oil to be fully reacted and adsorbed with the activated clay, settling for 30 minutes, discharging settled sediments through a dreg discharging port, conveying the settled oil to an automatic dreg discharging filter, filtering out a small amount of colloid, additives, asphaltene and the like, and pumping the filtered oil into a finished base oil tank.
Further, the oil-containing filtered sand filtered by the automatic slag-discharging filter in the step S7 enters a second heating furnace, the oil-containing filtered sand is heated at the temperature of 320-470 ℃, the generated oil vapor is pumped into a conical buffer tank for further circulation through a liquid oil obtained by condensation, the uncondensed oil vapor is processed and then enters a combustion chamber for utilization as fuel, and the filtered sand remaining in the second heating furnace is transferred into a decoloring tower for secondary circulation after being processed.
Compared with the prior art, the invention has the following beneficial effects:
the method comprises the steps of filtering the crude waste mineral oil, cleaning out larger oil sludge, impurities and the like in the oil, standing for separation, removing most of the impurities and water components in the waste mineral oil, heating the waste oil into oil steam through heating and distillation, collecting crude oil through multi-stage cooling, and decolorizing and refining to obtain the finished base oil.
Drawings
FIG. 1 is a schematic diagram of a system for preparing crude base oil according to the present invention.
FIG. 2 is a schematic view showing the structure of a decoloring refining system according to the present invention.
In the figure: 1-primary oil tank, 2-deslagging filter, 3-primary separating tank, 4-raw oil storage tank, 5-heating tank, 6-distillation tower, 7-primary cooling device, 8-secondary cooling device, 9-vacuum condenser, 10-water-gas separating device, 11-wastewater treatment device, 12-fuel oil crude tank, 13-base oil crude tank, 14-asphalt storage tank, 15-decoloring tower, 16-automatic deslagging filter, 17-base oil finished product tank, 18-second heating furnace and 19-condenser.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Examples
A regeneration treatment system of waste mineral oil comprises a primary oil tank 1, a slag discharge filter 2, a primary separation tank 3, a raw oil storage tank 4, a heating tank 5, a distillation tower 6, a primary cooling device 7, a secondary cooling device 8 and a vacuum condenser 9; the primary oil tank 1 is set to be a conical tank, 4 primary oil tanks 1 are arranged and installed in a leakage-proof tank pool, the primary oil tanks 1 are connected with a slag discharging filter 2 through oil pumps, a slag cleaning bin is arranged on the slag discharging filter 2 to facilitate cleaning of oil slag generated in the machining process, the slag discharging filter 2 is connected with a primary separating tank 3 through the oil pumps, the bottom of the primary separating tank 3 is set to be a conical structure, a slag discharging port is arranged at the bottom of the primary separating tank 3, the primary separating tank 3 is connected to a raw oil storage tank 4 through the oil pumps, an oil inlet of the raw oil storage tank 4 is arranged at the lower part of the tank body, the raw oil storage tank 4 is connected to a heating tank 5 through the oil pumps, a plurality of conical buffer tanks are further arranged between the raw oil storage tank 4 and the heating tank 5, the conical buffer tanks are set to be phi 1.6 x h7.5m in specification, the conical buffer tanks are respectively communicated, when further settlement is needed, raw oil in a raw oil storage tank 4 enters a conical buffer tank in batches, then is sequentially introduced into a heating tank 5 after settlement, the heating tank 5 is set as a tubular furnace system heating tank which adopts a YQ-500Y type heating furnace, the tubular furnace system heating tank adopts a small-caliber furnace tube, the heating area is increased, the linear velocity is improved, the retention time of the raw oil in the furnace tube is reduced, the raw oil is prevented from coking and blocking a furnace body in the furnace body, the temperature in the heating tank 5 is kept at 270 ℃, a combustion chamber is arranged at the bottom of the heating tank 5, the heating tank 5 is powered through the combustion chamber, an outlet of the heating tank 5 is connected to an inlet of a distillation tower 6 through a pipeline, an oil-gas pipeline is arranged at an outlet of the distillation tower 6, a primary cooling device 7 is arranged on the oil-gas pipeline, the bottom of the distillation tower 6 is connected to an asphalt storage tank 14 through, the system comprises an oil-gas pipeline, a primary cooling device 7, a secondary cooling device 8, a crude base oil tank 13, a crude fuel oil tank 12, a vacuum condenser 9, a wastewater treatment device 11, a water-gas separation device 10, a gas collection device 10, a gas supply pipe, a water-seal flame arrester, a decoloration tower 15, a waste residue discharge port, an automatic residue discharge filter 16, a crude base oil tank 17, a crude base oil tank 13, a crude base oil tank 9, a water-gas separation device 10, a fuel gas collection device, a fuel gas discharge port, a water pump, a combustion chamber and a water-seal flame arrester, wherein the oil-gas pipeline is connected with the outlet of the primary cooling device 7, the oil-gas pipeline is connected with the crude fuel oil tank 12 and the vacuum condenser 9 through the secondary, the automatic slag discharge filter 16 is connected with a second heating furnace 18, the second heating furnace 18 is connected with a combustion chamber, the upper part of the second heating furnace 18 is connected onto a condenser 19 through a pipeline, a second water-gas separation device is arranged on the condenser 19 and is connected onto a fuel gas collection device through a pipeline, and the second heating furnace 18 is connected onto a decoloring tower 15 through a sludge pump.
The treatment process of the invention comprises the following steps: after the waste mineral oil is transported into a factory by a closed tank car or a transport closed container vehicle, sampling detection is carried out firstly, the waste mineral oil can be transported into the factory after meeting the in-factory recovery standard, after the waste mineral oil is qualified by inspection, the waste mineral oil is stored in a primary oil tank 1, inspection wastewater generated in the inspection process is pumped into a sewage treatment station through a pipeline for treatment, and the primary oil tank 1 carries out oil sludge and impurity cleaning once every quarter; pumping the waste mineral oil in the primary oil tank 1 into an automatic slag discharge filter 16 through an oil pump for coarse separation and filtration, filtering out larger oil sludge and impurities from the waste mineral oil, and finishing cleaning; pumping the waste mineral oil after coarse filtration into a primary separation tank 3 through an oil pump, naturally standing, settling for 12-24 hours, separating oil and water by utilizing the specific gravity difference of the oil, the water and the slag, wherein the oil component floats on the surface, the water component sinks at the bottom, then pumping the water by utilizing a self-sucking pump, then centrifugally homogenizing the oil component to obtain the waste mineral oil containing a small amount of water, pumping the waste mineral oil into a raw oil storage tank 4, opening the bottom of a tank body of the primary separation tank 3 to discharge separated waste water and oil sludge, and pumping the waste water into a sewage treatment station through a pipeline for treatment; raw oil in a raw oil storage tank 4 enters a conical buffer tank in batches, naturally stands, settles for 8 hours, and performs secondary separation on oil and water by utilizing the specific gravity difference of the oil, the water and the slag, so as to further remove a small amount of water and impurities in the raw oil, the bottom of the tank body is opened to separate oil-containing wastewater and oil sludge, and the oil-containing wastewater is pumped into a sewage treatment station through a pipeline for treatment; pumping the treated anhydrous waste oil into a heating tank 5 for heating, keeping the temperature of the heating tank 5 at 270 ℃, converting most of the waste oil from a liquid state into a gaseous state, then enabling oil vapor to enter a distillation tower 6, enabling the temperature in the distillation tower 6 to be 270 ℃ and the pressure to be 200pa, rapidly evaporating the waste oil introduced into a distiller to obtain gasified oil vapor, and enabling heavy oil at the bottom of the distillation tower to mainly comprise asphalt and flow into an asphalt storage tank 14 through a pipeline for storage; the gasified oil steam enters a primary cooling device 7, the gasified oil steam is cooled to below 180 ℃ in an indirect water cooling mode to form liquid base oil, then the liquid base oil is pumped into a base oil crude oil tank 13, the uncondensed gasified oil steam enters a secondary cooling device 8 and is cooled to below 60 ℃ in an indirect water cooling mode to form liquid fuel oil, then the liquid fuel oil is pumped into a fuel oil crude oil tank 12, the uncondensed gasified oil steam passes through the secondary cooling device 8 and then enters a vacuum condenser 9, trace oil-containing gas is cooled in an indirect water cooling mode, the cooled gasified oil steam enters a water-gas separation device 10, the separated oil gas enters a fuel gas collection device for collection, and then the separated oil gas is introduced into a combustion chamber to be used as fuel; pumping the oil in the base oil crude oil tank 13 into a decolorization tower 15 through an oil pump, adding activated clay, heating to 110-120 ℃, stirring for 30 minutes to ensure that impurities in the crude oil and the activated clay fully react and adsorb, settling for 30 minutes, discharging settled sediments through a dreg discharging port, conveying the settled oil to an automatic dreg discharging filter 16, filtering out a small amount of colloid, additives, asphaltene and the like, then the filtered oil is pumped into a base oil finished product tank 17, the oil-containing filter sand filtered by the automatic slag-discharging filter 16 enters a second heating furnace 18, heating at the temperature of 320-470 ℃, pumping the liquid oil obtained by condensing the generated oil steam into a conical buffer tank for further circulation, treating and processing the uncondensed oil steam, then feeding the treated oil steam into a combustion chamber for utilization as fuel, and transferring the filtered sand remaining in the second heating furnace 18 into the decoloring tower 15 for secondary circulation treatment. The system has the advantages of good process treatment effect, high quality of the obtained oil, low cost, high efficiency, energy conservation and no pollution.
Reference throughout this specification to embodiments means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment described generally in this application. The appearances of the same phrase in various places in the specification are not necessarily all referring to the same embodiment. Further, when a particular feature, structure, or characteristic is described in connection with any embodiment, it is submitted that it is within the scope of the invention to effect such feature, structure, or characteristic in connection with other embodiments.
Although the invention has been described herein with reference to a number of illustrative embodiments thereof, it should be understood that numerous other modifications and embodiments can be devised by those skilled in the art that will fall within the spirit and scope of the principles of this disclosure. More specifically, various variations and modifications are possible in the component parts and/or arrangements of the subject combination arrangement within the scope of the disclosure, the drawings and the appended claims. In addition to variations and modifications in the component parts and/or arrangements, other uses will also be apparent to those skilled in the art.
Claims (9)
1. A regeneration treatment system of waste mineral oil is characterized in that: comprises a primary oil tank (1), a slag discharge filter (2), a primary separating tank (3), a raw oil storage tank (4), a heating tank (5), a distillation tower (6), a primary cooling device (7), a secondary cooling device (8) and a vacuum condenser (9); the primary oil tank (1) is connected with the slag discharging filter (2) through an oil pump, an oil slag cleaning bin is arranged on the slag discharging filter (2), the slag discharging filter (2) is connected with a primary separating tank (3) through the oil pump, the bottom of the primary separating tank (3) is set to be of a conical structure, a slag discharging port is arranged at the bottom of the primary separating tank (3), the primary separating tank (3) is connected onto the raw oil storage tank (4) through the oil pump, an oil inlet of the raw oil storage tank (4) is arranged at the lower part of the tank body, the storage tank (4) is connected onto the heating tank (5) through the oil pump, a combustion chamber is arranged at the bottom of the heating tank (5), an outlet of the heating tank (5) is connected at an inlet of the distillation tower (6) through a pipeline, an oil gas pipeline is arranged at a raw oil outlet of the distillation tower (6), and a primary, distillation column (6) bottom is passed through the pipe connection on pitch holding vessel (14), the oil gas pipeline is connected with base oil crude oil jar (13) and second grade cooling device (8) respectively in one-level cooling device (7) exit, and the oil gas pipeline is connected with fuel oil crude oil jar (12) and vacuum condenser (9) through second grade cooling device (8), and vacuum condenser (9) are passed through the pipe connection on effluent treatment plant (11), base oil crude oil jar (13) are connected on decoloration tower (15) through the oil pump, decoloration tower (15) bottom is provided with the waste residue discharge port, decoloration tower (15) are passed through oil pump connection on automatic row sediment filter (16), automatic row sediment filter (16) are connected with base oil finished product jar (17) through the oil pump.
2. The system for recycling waste mineral oil according to claim 1, wherein: the primary oil tank (1) is arranged as a conical tank and is installed in an anti-leakage tank pool.
3. The system for recycling waste mineral oil according to claim 1, wherein: a plurality of conical buffer tanks are arranged between the raw oil storage tank (4) and the heating tank (5), and the conical buffer tanks are respectively communicated with the raw oil storage tank (4) and the heating tank (5).
4. The system for recycling waste mineral oil according to claim 1, wherein: the heating tank (5) is arranged as a heating tank of a tubular furnace system, the heating tank of the tubular furnace system adopts a small-caliber furnace tube, and the temperature in the heating tank (5) is kept at 270 ℃.
5. The system for recycling waste mineral oil according to claim 1, wherein: the vacuum condenser (9) is connected with a water-gas separation device (10), the water-gas separation device (10) is connected with a fuel gas collection device, the fuel gas collection device is provided with an air supply pipe connected with a combustion chamber, and the air supply pipe is provided with a water seal flame arrester.
6. The system for recycling waste mineral oil according to claim 1, wherein: the automatic slag discharging filter (16) is connected with a second heating furnace (18), the second heating furnace (18) is connected with a combustion chamber, the upper part of the second heating furnace (18) is connected onto a condenser (19) through a pipeline, a second water-gas separating device is arranged on the condenser (19), and the second water-gas separating device is connected onto a fuel gas collecting device through a pipeline.
7. The system for recycling waste mineral oil according to claim 6, wherein: the second heating furnace (18) is connected with the decoloring tower (15) through a sludge pump.
8. The process of claim 1 to 7, wherein the treatment process comprises the following steps: comprises the following steps of (a) carrying out,
s1, entrance inspection: after the waste mineral oil is transported into a factory by a closed tank car or a transport closed container vehicle, sampling detection is carried out firstly, the waste mineral oil can be sent into the factory after meeting the recovery standard in the factory, after the waste mineral oil is qualified by inspection, the waste mineral oil is stored in a primary oil tank (1), inspection wastewater generated in the inspection process is pumped into a sewage treatment station through a pipeline for treatment, and the primary oil tank (1) is cleaned up by oil sludge and impurities once a season;
s2, coarse filtration: pumping the waste mineral oil in the primary oil tank (1) into an automatic slag discharge filter (16) through an oil pump for coarse separation and filtration, filtering out larger oil sludge and impurities from the waste mineral oil, and finishing cleaning;
s3, primary separation: pumping the waste mineral oil after coarse filtration into a primary separation tank (3) through an oil pump, naturally standing, settling for 12-24 hours, separating oil and water by utilizing the specific gravity difference of the oil, the water and the slag, floating the oil component on the surface and sinking the water component at the bottom, pumping the water component by using a self-sucking pump, centrifugally homogenizing the oil component to obtain the waste mineral oil containing a small amount of water, pumping the waste mineral oil into a raw oil storage tank (4), opening the bottom of a tank body of the primary separation tank (3) to discharge separated waste water and oil sludge, and pumping the waste water into a sewage treatment station through a pipeline pump for treatment;
s4, secondary separation: raw oil in a raw oil storage tank (4) enters a conical buffer tank in batches, naturally stands, settles for 8 hours, and performs secondary separation on oil and water by utilizing the specific gravity difference of the oil, the water and the slag, so as to further remove a small amount of water and impurities in the raw oil, the bottom of the tank body is opened to separate oil-containing wastewater and oil sludge, and the oil-containing wastewater is pumped into a sewage treatment station through a pipeline for treatment;
s5, heating and distilling: pumping pretreated anhydrous waste oil into a heating tank (5) for heating, keeping the temperature of the heating tank (5) at 270 ℃, converting most of the waste oil from a liquid state into a gaseous state, then introducing oil vapor into a distillation tower (6), wherein the temperature in the distillation tower (6) is 270 ℃, the pressure is negative pressure 200pa, the waste oil introduced into a distiller is rapidly evaporated to obtain gasified oil vapor, and heavy oil at the bottom of the distillation tower mainly comprises asphalt and flows into an asphalt storage tank (14) through a pipeline for storage;
s6, cooling and collecting: the gasified oil steam enters a primary cooling device (7), the gasified oil steam is cooled to be below 180 ℃ in an indirect water cooling mode to form liquid base oil, then the liquid base oil is pumped into a base oil crude oil tank (13), the uncondensed gasified oil steam enters a secondary cooling device (8), the gasified oil steam is cooled to be below 60 ℃ in an indirect water cooling mode to form liquid fuel oil, then the liquid fuel oil is pumped into a fuel oil crude oil tank (12), the uncondensed gasified oil steam passes through the secondary cooling device (8) and then enters a vacuum condenser (9), a small amount of oil-containing gas is cooled in an indirect water cooling mode, the cooled gasified oil steam enters a water-gas separation device (10), the separated oil gas enters a fuel gas collection device to be collected, and then the separated oil gas is introduced into a combustion chamber to be;
s7, decoloring and refining: pumping oil in a crude oil tank (13) of base oil into a decoloring tower (15) through an oil pump, adding activated clay, heating to 110-120 ℃, stirring for 30 minutes to enable impurities in the crude oil to be fully reacted and adsorbed with the activated clay, settling for 30 minutes, discharging settled sediments through a deslagging port, conveying the settled oil to an automatic deslagging filter (16), filtering out a small amount of colloid, additives, asphaltene and the like, and pumping the filtered oil into a finished base oil tank (17).
9. The process according to claim 8, wherein the regeneration treatment of the waste mineral oil comprises: and the oil-containing filter sand filtered by the automatic deslagging filter (16) in the step S7 enters a second heating furnace (18), the oil-containing filter sand is heated at the temperature of 320-470 ℃, the generated oil steam is pumped into a conical buffer tank for further circulation through liquid oil obtained by condensation, the uncondensed oil steam is treated and processed and then enters a combustion chamber for utilization as fuel, and the filter sand remaining in the second heating furnace (18) is transferred into a decoloring tower (15) for secondary circulation treatment after treatment.
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