CN114989861B - Recycling system of waste mineral oil - Google Patents
Recycling system of waste mineral oil Download PDFInfo
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- CN114989861B CN114989861B CN202210551308.XA CN202210551308A CN114989861B CN 114989861 B CN114989861 B CN 114989861B CN 202210551308 A CN202210551308 A CN 202210551308A CN 114989861 B CN114989861 B CN 114989861B
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- 239000002699 waste material Substances 0.000 title claims abstract description 117
- 239000002480 mineral oil Substances 0.000 title claims abstract description 91
- 235000010446 mineral oil Nutrition 0.000 title claims abstract description 90
- 238000004064 recycling Methods 0.000 title claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 208
- 239000003921 oil Substances 0.000 claims abstract description 85
- 238000001556 precipitation Methods 0.000 claims abstract description 63
- 239000011229 interlayer Substances 0.000 claims abstract description 60
- 238000010438 heat treatment Methods 0.000 claims abstract description 44
- 238000004821 distillation Methods 0.000 claims abstract description 24
- 238000005189 flocculation Methods 0.000 claims abstract description 24
- 230000016615 flocculation Effects 0.000 claims abstract description 24
- 238000000926 separation method Methods 0.000 claims abstract description 19
- 239000002918 waste heat Substances 0.000 claims abstract description 15
- 238000001179 sorption measurement Methods 0.000 claims abstract description 11
- 238000001728 nano-filtration Methods 0.000 claims abstract description 10
- 239000002994 raw material Substances 0.000 claims abstract description 10
- 239000002184 metal Substances 0.000 claims description 44
- 239000012535 impurity Substances 0.000 claims description 39
- 238000004062 sedimentation Methods 0.000 claims description 22
- 239000012774 insulation material Substances 0.000 claims description 9
- 239000002893 slag Substances 0.000 claims description 9
- 238000007599 discharging Methods 0.000 claims description 8
- 239000002245 particle Substances 0.000 claims description 6
- 238000007790 scraping Methods 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 5
- 229920003229 poly(methyl methacrylate) Polymers 0.000 claims description 4
- 239000004926 polymethyl methacrylate Substances 0.000 claims description 4
- 238000003303 reheating Methods 0.000 claims description 2
- 238000001914 filtration Methods 0.000 claims 1
- 238000000034 method Methods 0.000 description 13
- 230000005389 magnetism Effects 0.000 description 6
- 239000002351 wastewater Substances 0.000 description 6
- 239000002689 soil Substances 0.000 description 5
- 238000005299 abrasion Methods 0.000 description 4
- 239000010410 layer Substances 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- 239000002199 base oil Substances 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 3
- 239000012528 membrane Substances 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 2
- 230000001680 brushing effect Effects 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 239000010721 machine oil Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 125000005575 polycyclic aromatic hydrocarbon group Chemical group 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 239000003923 scrap metal Substances 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- 150000001335 aliphatic alkanes Chemical class 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 150000001555 benzenes Chemical class 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000004064 dysfunction Effects 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000010705 motor oil Substances 0.000 description 1
- 210000004400 mucous membrane Anatomy 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 235000016709 nutrition Nutrition 0.000 description 1
- 230000035764 nutrition Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 150000002989 phenols Chemical class 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
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
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Removal Of Floating Material (AREA)
Abstract
The invention relates to the technical field of recycling of waste mineral oil, in particular to a recycling system of waste mineral oil, which comprises a waste oil raw material tank, wherein the waste oil raw material tank is sequentially connected with a precipitation tank, a flocculation separation tank, a distillation device, a nanofiltration device and a finished oil storage device through pipelines; further comprises: the tank body heating device is fixedly arranged on the precipitation tank; and the electromagnetic adsorption device is fixedly arranged on the precipitation tank. The invention heats the hot water in the boiler through the waste heat of the distillation device, the water pump pumps the hot water to flow into the water storage interlayer from the water pipe I, at the moment, the electromagnetic valve I is opened, and the cooled hot water in the water storage interlayer flows into the heating boiler from the water pipe II to be reheated, so that the purpose that the hot water in the water storage interlayer keeps a certain temperature interval to indirectly heat the waste mineral oil in the precipitation tank is achieved, the waste heat of the distillation device is utilized for heating, the energy loss is reduced, and the heating cost is reduced.
Description
Technical Field
The invention relates to the technical field of recycling of waste mineral oil, in particular to a recycling system of waste mineral oil.
Background
Waste mineral oils are complex mixtures composed of a number of substances, the main components of which are C15-C36 alkanes, polycyclic Aromatic Hydrocarbons (PAHs), olefins, benzenes, phenols, etc. The components have certain toxicity and harm to human body. Thus, once a large amount enters the external environment, serious environmental pollution is caused. In addition, the waste mineral oil also damages the normal living environment of organisms, and has physical effects of causing biological dysfunction. For example, waste mineral oil can be stuck to plant roots to form a layer of mucous membrane besides blocking soil pores and destroying soil quality due to the fact that the waste mineral oil has larger viscosity after polluting soil, so that the roots are prevented from absorbing moisture and nutrient substances, and the plant roots are rotten, lack of nutrition and die in a large area. When the soil pores are larger, the petroleum wastewater can also permeate into the deep soil layer and even pollute shallow groundwater. However, the waste mineral oil is a precious resource, and is comprehensively utilized, so that the method has very important significance for relieving the shortage situation of resources in China and solving the bottleneck problem of short supply and demand of oil products, improving the utilization rate of the existing resources and protecting the ecological environment, and the recycling system of the waste mineral oil is produced. In the prior art, aiming at oils mixed, metal impurities, muddy sand and oils with higher moisture (such as waste oil recovered in automobile industry and mechanical maintenance industry), the following process is adopted to carry out waste oil regeneration, firstly waste mineral oil flows out from an oil outlet of a waste oil raw material tank to be pretreated, then enters a precipitation tank to carry out physical sedimentation, then carries out flocculation precipitation to remove solid impurities, after the sedimentation process is completed, the waste mineral oil is moved to a distillation device, moisture and volatile substances in the waste mineral oil are removed by a flash evaporator, then light components in the waste mineral oil are removed by a vacuum film evaporator, after the completion, the waste mineral oil is moved to a nanofiltration device, the waste mineral oil after the light components are removed is filtered by a nanofiltration membrane, and the regenerated base oil is moved to a finished product oil storage device to be stored. In the recovery treatment process of the waste mineral oil, the waste mineral oil needs to be subjected to standing precipitation, standing waiting time is long, and under the condition that the treatment time is short and the treatment is not in place, excessive metal impurities enter a flocculation separation tank, so that the oil pipe is greatly worn, and the subsequent equipment is also greatly loaded.
Therefore, a recycling system of waste mineral oil is provided.
Disclosure of Invention
The invention aims to provide a recycling system of waste mineral oil, which accelerates sedimentation of metal impurities through a tank body heating device and an electromagnetic adsorption device, and reduces the metal impurities entering an oil pipe and a flocculation separation tank to the greatest extent so as to solve the problems in the background technology.
In order to achieve the above purpose, the present invention provides the following technical solutions:
the recycling system of the waste mineral oil comprises a waste oil raw material tank, wherein the waste oil raw material tank is sequentially connected with a precipitation tank, a flocculation separation tank, a distillation device, a nanofiltration device and a finished oil storage device through pipelines;
further comprises:
the tank body heating device is fixedly arranged on the precipitation tank;
and the electromagnetic adsorption device is fixedly arranged on the precipitation tank.
Preferably, the tank body heating device comprises a water storage interlayer arranged in the tank wall of the precipitation tank, the water storage interlayer is full of hot water, and the hot water is heated by waste heat of the distillation device.
Preferably, the upper end of the outer side wall of the precipitation tank is provided with a water inlet which extends to the water storage interlayer, the water inlet is fixedly connected with a first water pipe, a water suction pump is fixedly installed on the first water pipe, the lower end of the outer side wall of the precipitation tank is provided with a water outlet which extends to the water storage interlayer, the water outlet is fixedly connected with a second water pipe, the second water pipe is fixedly provided with a first electromagnetic valve, a heating boiler is fixedly installed between one end, far away from the water inlet, of the first water pipe and one end, far away from the water outlet, of the second water pipe, and the heating boiler is heated by waste heat of the distillation device.
Preferably, a plurality of temperature control switches for controlling the water temperature in the water storage interlayer are uniformly and fixedly arranged in the water storage interlayer, and the temperature control switches are electrically connected to the water pump and the electromagnetic valve I.
Preferably, the first water pipe, the second water pipe and the outer side wall of the precipitation tank are all wrapped with heat insulation materials.
Preferably, the electromagnetic adsorption device comprises a plurality of electromagnets which are uniformly and fixedly arranged on the outer side face of the tank bottom of the precipitation tank, and the tank bottom of the precipitation tank is a conical surface.
Preferably, a plurality of oil drain ports are uniformly formed in the position, deviating from the water storage interlayer, of the precipitation tank body from top to bottom, the plurality of oil drain ports are fixedly connected with the input end of the electromagnetic valve II, the output end of the electromagnetic valve II is fixedly provided with an oil drain pipe, one ends, far away from the electromagnetic valve II, of the plurality of oil drain pipes are commonly connected to the main pipeline, the oil drain pipe inclines downwards for thirty degrees compared with the oil drain ports, one ends, far away from the oil drain pipes, of the main pipeline are connected to the flocculation separation tank, an observation port for observing liquid layering is formed in the position, deviating from the water storage interlayer, of the side wall of the precipitation tank, the observation port is located near the oil drain port, and the observation port is made of acrylic glass.
Preferably, the filter screen is fixedly arranged at each of the plurality of oil drain ports.
Preferably, a motor is fixedly arranged at the lower side of the shaft center of the tank bottom of the settling tank, a rotating shaft is fixedly arranged at the output end of the motor, a scraping plate is fixedly arranged on the side wall of the rotating shaft, a motor is fixedly arranged at the lower side of the shaft center of the tank bottom of the settling tank, the rotating shaft is fixedly arranged at the output end of the motor, a scraping plate is fixedly arranged on the side wall of the rotating shaft, a slag discharging pipe is fixedly arranged at the position, deviating from the rotating shaft, of the tank bottom of the settling tank, and a valve is fixedly arranged on the slag discharging pipe.
Preferably, the scraper is deviated from the axis center of the rotating shaft by thirty degrees, and the thickness of one end of the scraper, which is far away from the rotating shaft, is gradually increased.
Compared with the prior art, the invention has the beneficial effects that:
1. the hot water in the boiler is heated by the waste heat of the distillation device, the water pump pumps the hot water to flow into the water storage interlayer from the first water pipe, the first electromagnetic valve is opened at the moment, and the cooled hot water in the water storage interlayer is reheated from the second water pipe to the heating boiler, so that the purpose that the hot water in the water storage interlayer keeps a certain temperature interval to indirectly heat the waste mineral oil in the precipitation tank is achieved, the waste heat of the distillation device is utilized for heating, the energy loss is reduced, and the heating cost is reduced.
2. A plurality of electromagnets are uniformly and fixedly installed on the outer side face of the tank bottom of the settling tank, the electromagnets are opened to adsorb metal impurities mixed with waste mineral oil in the settling tank in the settling process, layered waste mineral oil is discharged, the magnetism of the electromagnets is closed to disappear, the settled metal impurities on the bottom wall of the settling tank are also conveniently cleaned, compared with a permanent magnet, the magnetism is less influenced by temperature, and the switch can be controlled, so that the settling time is further reduced, and the metal impurities entering the flocculation separation tank are reduced.
3. Thermal insulation materials are wrapped on the outer side wall of the settling tank, the first water pipe and the second water pipe, the tank body of the settling tank is large, heat loss caused by large surface area can be serious, the fact that the heating boiler heats hot water in a timely manner is avoided, the water temperature in the water storage interlayer is always maintained at a proper temperature, water resource waste is caused by hot water replacement, the thermal insulation materials are wrapped, heat loss is reduced, and energy consumption is reduced.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a left side view of the present invention;
FIG. 3 is a front cross-sectional view of the present invention;
fig. 4 is a partial enlarged view of a portion a in fig. 3.
In the figure: 1. a precipitation tank; 2. a water storage interlayer; 3. a water inlet; 4. a first water pipe; 5. a water pump; 6. a water outlet; 7. a heating boiler; 8. a second water pipe; 9. a first electromagnetic valve; 10. a filter screen; 11. a temperature control switch; 12. an electromagnet; 13. an oil drain port; 14. a second electromagnetic valve; 15. an oil drain pipe; 16. a main pipe; 17. an observation port; 18. a motor; 19. a rotation shaft; 20. a scraper; 21. a slag discharge pipe; 22. and (3) a valve.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise. Furthermore, the terms "mounted," "connected," "coupled," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Referring to fig. 1 to 4, the present invention provides a recycling system for waste mineral oil, which has the following technical scheme:
the recycling system of the waste mineral oil comprises a waste oil raw material tank, wherein the waste oil raw material tank is sequentially connected with a precipitation tank 1, a flocculation separation tank, a distillation device, a nanofiltration device and a finished oil storage device through pipelines;
further comprises:
the tank body heating device is fixedly arranged on the precipitation tank 1;
electromagnetic adsorption device, fixed mounting has electromagnetic adsorption device on the precipitation tank 1.
Firstly, waste mineral oil flows out from an oil outlet of a waste oil raw material tank and enters a precipitation tank 1 to carry out physical precipitation, then flocculation precipitation is carried out to remove solid impurities, the waste mineral oil is moved to a distillation device after the precipitation process is completed, the flash evaporator is utilized to remove moisture and volatile matters in the waste mineral oil, then the vacuum film evaporator is utilized to remove light components in the waste mineral oil, the waste mineral oil after the light components are removed is moved to a nanofiltration device after the completion of the process, the waste mineral oil is filtered by utilizing a nanofiltration membrane, the regenerated base oil is obtained after the completion of the process, the waste mineral oil is moved to a finished product oil storage device to be stored, waste engine oil in the waste mineral oil occupies a large proportion, a large amount of metal chips are contained in the waste mineral oil, when the waste mineral oil is taken out by a waste mineral oil recovery station in the prior art, the waste mineral oil is required to be subjected to standing precipitation, the standing waiting time is long, under the condition that the treatment time is short, and under the condition that the treatment is not in place, excessive metal impurities enter a flocculation separation tank, great abrasion is caused to an oil pipe, and great load is also generated to follow-up equipment, the waste mineral oil is heated by a tank heating device and an electromagnetic adsorption device, and the metal impurities entering the flocculation separation tank are reduced.
As an embodiment of the present invention, referring to fig. 1, the tank heating device includes a water storage interlayer 2 provided in a tank wall of a precipitation tank 1, the water storage interlayer 2 being filled with hot water, and the hot water being heated by waste heat of a distillation device.
The waste mineral oil in the precipitation tank 1 is indirectly heated, the density difference of each component in the waste mineral oil is larger, the sedimentation is easier, the viscosity and density of the oil are larger, and the sedimentation is more difficult, so that the waste mineral oil is generally heated, the viscosity and density of the waste mineral oil are reduced, the sedimentation is facilitated, and the waste mineral oil is generally heated at 70-90 ℃, the waste heat of the distillation device heats the hot water to circulate in the water storage interlayer 2 in the tank wall of the precipitation tank 1, so that the traditional electric heating can be prevented, the diffusion speed of impurities is increased due to the local boiling at too high temperature, and meanwhile, the viscosity and density of the waste mineral oil are reduced due to the stable low-temperature heating, the fluidity of the waste mineral oil is facilitated to be increased, and the time for sedimentation of impurities is facilitated to be shortened.
As an embodiment of the present invention, referring to fig. 3, the upper end of the outer side wall of the precipitation tank 1 is provided with a water inlet 3 extending to the water storage interlayer 2, the water inlet 3 is fixedly connected with a water pipe one 4, a water pump 5 is fixedly installed on the water pipe one 4, the lower end of the outer side wall of the precipitation tank 1 is provided with a water outlet 6 extending to the water storage interlayer 2, the water outlet 6 is fixedly connected with a water pipe two 8, the water pipe two 8 is fixedly provided with an electromagnetic valve one 9, a heating boiler 7 is fixedly installed between one end of the water pipe one 4 far from the water inlet 3 and one end of the water pipe two 8 far from the water outlet 6, and the heating boiler 7 is heated by waste heat of the distillation device.
The distillation device is generally heated by a tubular heating furnace, the tubular heating furnace is generally heated by direct receiving fire, fuel is combusted in a hearth of the tubular heating furnace to generate high-temperature flue gas, waste mineral oil is dehydrated in a heat radiation mode, hot water in a waste heat heating boiler 7 combusted in the hearth of the tubular heating furnace of the distillation device is pumped by a water pump 5 to flow into a water storage interlayer 2 from a water pipe I4, an electromagnetic valve I9 is opened at the moment, and cooled hot water in the water storage interlayer 2 flows from a water pipe II 8 to the heating boiler 7 for reheating, so that the waste mineral oil in a settling tank 1 is indirectly heated by the hot water in the water storage interlayer 2 in a certain temperature interval, and the waste heat of the distillation device is utilized for heating, thereby reducing energy loss and heating cost.
As an embodiment of the present invention, referring to fig. 3, a plurality of temperature control switches 11 for controlling the water temperature in the water storage interlayer 2 are uniformly and fixedly installed in the water storage interlayer 2, and the plurality of temperature control switches 11 are electrically connected to the water pump 5 and the solenoid valve one 9.
When the temperature of the waste mineral oil is preferably between seventy degrees and ninety degrees, a plurality of temperature control switches 11 for controlling the water temperature in the water storage interlayer 2 are uniformly and fixedly arranged in the water storage interlayer 2, the temperature control switches 11 are electrically connected to the water suction pump 5 and the first electromagnetic valve 9, the temperature control switches 11 are set to keep the water suction pump 5 and the first electromagnetic valve 9 in a closed state when the water temperature is maintained between seventy degrees and ninety degrees, if the water temperature exceeds ninety degrees or is lower than seventy degrees, the temperature control switches 11 control the water suction pump 5 and the first electromagnetic valve 9 to be opened, the water suction pump 5 pumps hot water into the water storage interlayer 2, the electromagnetic valve is opened to discharge the cooled water in the water storage interlayer 2, the temperature control switches 11 are arranged at different positions in the water storage interlayer 2, the water temperature in the water storage interlayer 2 can be uneven, the water suction pump 5 and the first electromagnetic valve 9 are opened for hot water replacement when the water temperature in any position exceeds ninety degrees or is lower than seventy degrees, and accordingly the temperature of a tank is stably maintained, and the waste mineral oil metal impurities are facilitated to be settled.
As an embodiment of the present invention, referring to fig. 3, the first water pipe 4, the second water pipe 8 and the outer side wall of the precipitation tank 1 are all wrapped with heat insulation materials.
Thermal insulation materials are wrapped on the outer side wall of the settling tank 1, the first water pipe 4 and the second water pipe 8, the tank body of the settling tank 1 is large, heat loss caused by large surface area can be serious, the fact that the heating boiler 7 heats hot water in a timely manner is avoided, the water temperature in the water storage interlayer 2 is always kept at a proper temperature, hot water replacement is always carried out, water resource waste is caused, thermal insulation materials are wrapped, heat loss is reduced, and energy consumption is reduced.
As an embodiment of the present invention, referring to fig. 2 and 3, the electromagnetic adsorption device includes a plurality of electromagnets 12 uniformly and fixedly installed on the outer side surface of the tank bottom of the settling tank 1, and the tank bottom of the settling tank 1 is a conical surface.
A plurality of electromagnets 12 are uniformly and fixedly installed on the outer side face of the tank bottom of the settling tank 1, the electromagnets 12 are opened to adsorb metal impurities mixed with waste mineral oil in the settling tank 1 in the settling process, the layered waste mineral oil is discharged, the electromagnets 12 are closed to remove magnetism so as to conveniently clean the metal impurities settled on the bottom wall of the settling tank 1, the bottom of the settling tank 1 is a conical surface, the impurities are further convenient to clean, compared with a permanent magnet, the magnetism is less affected by temperature, a switch can be controlled, the settling time is further reduced, and the metal impurities entering the flocculation separation tank are reduced.
As an embodiment of the invention, referring to fig. 4, a plurality of oil drain ports 13 are uniformly formed in the position, deviated from the water storage interlayer 2, of the tank body of the settling tank 1 from top to bottom, the plurality of oil drain ports 13 are fixedly connected with the input ends of the electromagnetic valves II 14, the output ends of the electromagnetic valves II 14 are fixedly provided with oil drain pipes 15, one ends, far away from the electromagnetic valves II 14, of the plurality of oil drain pipes 15 are commonly connected to the main pipeline 16, the oil drain pipes 15 incline downwards by thirty degrees compared with the oil drain ports 13, one ends, far away from the oil drain pipes 15, of the main pipeline 16 are connected to the flocculation separation tank, an observation port 17 for observing liquid layering is formed in the position, deviated from the water storage interlayer 2, of the side wall of the settling tank 1, and the observation port 17 is positioned at a short distance from the oil drain ports 13.
The waste mineral oil is settled in the settling tank 1 each time, the settled impurity content is different after settlement, so the thickness of the settled impurity is different, the upper layer mineral oil is directly pumped by a pump, the settled impurity is easy to diffuse, so the settling tank is provided with an oil drain port 13 at intervals of twenty centimeters along the wall of the tank from top to bottom, the oil drain pipe 15 is inclined downwards by thirty degrees compared with the oil drain port 13, the settling tank 1 is generally larger, the time required for oil drain process is prolonged, the inclination angle is increased, the waste mineral oil is forced to flow into the oil drain pipe 15 under pressure, the waste mineral oil is also forced to flow under gravity, the liquid flows downwards, the oil drain efficiency is further improved, the electromagnetic valve II 14 is arranged in each oil drain port 13, the waste mineral oil layering condition is observed through an observation port 17, the observation port 17 is a transparent visual window, normal glass is easy to crack under the influence of water pressure, the main pipeline II 14 above the layering is selected to drain mineral oil into the flocculation separation tank 16, the main pipeline II above the layering is prevented from being pumped into the flocculation separation tank by opening the corresponding electromagnetic valve II 14, the main pipeline 15 and the main pipeline 16 is greatly reduced, and the work load is reduced to the flocculation separation tank is greatly reduced.
As an embodiment of the present invention, referring to fig. 4, a filter screen 10 is fixedly installed to each of the plurality of oil drain ports 13.
The filter screen 10 is fixedly arranged on the oil drain ports 13, the filter screen 10 filters large-particle metal in the initial stage of sedimentation, large-particle metal impurities are prevented from being attached to the second electromagnetic valve 14, the metal impurities are further reduced from entering the oil drain pipe 15 and the main pipeline 16, and abrasion to the oil drain pipe 15 and the main pipeline 16 is reduced.
As an embodiment of the present invention, referring to fig. 3, a motor 18 is fixedly installed at the lower side of the shaft center of the tank bottom of the settling tank 1, a rotating shaft 19 is fixedly installed at the output end of the motor 18, a scraper 20 is fixedly installed on the side wall of the rotating shaft 19, a slag discharging pipe 21 is fixedly installed at the position of the tank bottom of the settling tank 1 deviated from the rotating shaft 19, and a valve 22 is fixedly installed on the slag discharging pipe 21.
After the upper layer waste mineral oil is discharged from the interior of the precipitation tank 1, waste water and waste metal scraps in the precipitation tank 1 are discharged conveniently, and a motor 18 at the bottom axle center of the precipitation tank 1 drives a rotating shaft 19 to rotate so as to drive a scraper 20 brushing the bottom wall of the inner side of the precipitation tank 1, and the scraper 20 concentrates the waste metal scraps to be discharged from a slag discharge pipe 21, so that the waste metal scraps are discharged conveniently, and the waste metal scraps are prevented from being accumulated at the bottom of the tank all the time.
As an embodiment of the present invention, referring to fig. 4, blade 20 is offset from the axis of rotation shaft 19 by thirty degrees, and the thickness of blade 20 at the end remote from rotation shaft 19 gradually increases.
If the scraper 20 is perpendicular to the surface of the rotating shaft 19, the motor 18 drives the rotating shaft 19 and the scraper 20 to rotate, and scraped metal scraps can move outwards under the influence of centrifugal force and are further away from the slag discharging pipe 21, so that the scraper 20 is arranged to deviate from the axis center of the rotating shaft 19 by thirty degrees, the thickness of one end of the scraper 20 far away from the rotating shaft 19 is gradually increased, and the scrap metal scraps move towards the axis center direction along an inclined plane under the force of the scraper 20, so that the efficiency of discharging wastewater and the scrap metal scraps is greatly improved.
Working principle: firstly, the waste mineral oil flows out from an oil outlet of a waste oil raw material tank and enters a precipitation device to carry out physical sedimentation and flocculation precipitation to remove solid impurities, the waste mineral oil is moved to a distillation device after the precipitation process is completed, the flash evaporator is used for removing moisture and volatile matters in the waste mineral oil, then the vacuum film evaporator is used for removing light components in the waste mineral oil, the waste mineral oil after the light components are removed is moved to a nanofiltration device after the completion of the removal, the waste mineral oil is filtered by a nanofiltration membrane, the regenerated base oil is obtained after the completion of the removal, the waste mineral oil in the waste mineral oil is moved to a finished product oil storage device to store the waste machine oil, the waste machine oil contains a large amount of metal chips, when the waste mineral oil is taken out from a waste mineral oil recovery station in the prior art, the waste mineral oil is required to be subjected to standing precipitation, the standing waiting time is long, and under the condition that the treatment time is short and the treatment is not in place, excessive metal impurities enter a flocculation separation tank, great abrasion is caused to an oil pipe, great load is produced to subsequent equipment, metal impurity sedimentation is accelerated through a tank body heating device and an electromagnetic adsorption device, a water storage interlayer 2 is arranged in the tank wall of a precipitation tank 1, the water storage interlayer 2 is full of hot water, a distillation device is generally heated by a tubular heating furnace, the tubular heating furnace is generally heated by directly receiving fire, fuel is combusted in a hearth of the tubular heating furnace to generate high-temperature flue gas, waste mineral oil is dehydrated in a heat radiation mode, hot water in a waste heat heating boiler 7 combusted in the hearth of the tubular heating furnace of the distillation device is pumped by a water pump 5, the hot water flows into the water storage interlayer 2 from a water pipe I4, a solenoid valve I9 is opened at the moment, the cooled hot water in the water storage interlayer 2 flows into the heating boiler 7 from a water pipe II 8 to be reheated, the waste mineral oil in the precipitation tank 1 is indirectly heated by utilizing the waste heat of the distillation device to reduce energy loss, the waste mineral oil in the precipitation tank 1 is indirectly heated, when the temperature of the waste mineral oil is preferably seventy-ninety degrees, a plurality of temperature control switches 11 for controlling the water temperature in the water storage interlayer 2 are uniformly and fixedly arranged in the water storage interlayer 2, the plurality of temperature control switches 11 are electrically connected to the water suction pump 5 and the first electromagnetic valve 9, the temperature control switches 11 are set to keep the water suction pump 5 and the first electromagnetic valve 9 in a closed state when the water temperature is maintained between seventy-ninety degrees and the first electromagnetic valve 9, if the water temperature exceeds ninety degrees or is lower than ninety degrees, the temperature control switches 11 control the water suction pump 5 and the first electromagnetic valve 9 to be opened, the water suction pump 5 pumps hot water into the water storage interlayer 2, the electromagnetic valve is opened to discharge the cooled water in the water storage interlayer 2, the temperature control switch 11 is arranged at different positions in the water storage interlayer 2, the water temperature in the water storage interlayer 2 can be uneven, the water temperature at any position exceeds ninety degrees or is less than seventy degrees, the water suction pump 5 and the electromagnetic valve I9 are opened to replace hot water, so that the temperature of the tank body is stably maintained to be favorable for sedimentation of metal impurities of waste mineral oil, the local temperature can be prevented from being excessively high, the diffusion speed is increased, the viscosity and density of waste mineral oil are reduced by heating, the mobility of the waste mineral oil is favorable to be increased, the sedimentation time is favorable to be shortened, the heat insulation materials are wrapped on the outer side wall of the sedimentation tank 1, the water pipe I4 and the water pipe II 8, the tank body of the sedimentation tank 1 is large, the heat loss of the surface area is serious, the heating boiler 7 is avoided from heating the hot water in time, the water temperature in the water storage interlayer 2 is always maintained at an unsuitable temperature, the water resource waste is always caused by hot water replacement, the heat insulation material is wrapped, the heat loss is reduced, the energy consumption is reduced, a plurality of electromagnets 12 are uniformly and fixedly arranged on the outer side surface of the tank bottom of the precipitation tank 1, in the sedimentation process, the electromagnets 12 are opened to adsorb metal impurities mixed in waste mineral oil in the precipitation tank 1, the layered waste mineral oil is discharged, the electromagnet 12 is closed to remove magnetism so as to clean the metal impurities settled on the bottom wall of the precipitation tank 1, the tank bottom of the precipitation tank 1 is a conical surface, the impurities are further cleaned conveniently, compared with a permanent magnet, the magnetism is less influenced by temperature, a switch is controllable, the sedimentation time is further reduced, the waste mineral oil is settled in the precipitation tank 1 each time, the content of the settled impurities is different after sedimentation, so that the thickness of the settled impurities is different, the upper mineral oil is directly pumped by a pump, the settled impurities are easy to diffuse, and an oil discharge port 13 is respectively arranged every twenty centimeters along the tank wall from top to bottom, the electromagnetic valve II 14 is arranged in each oil drain port 13, the waste mineral oil layering condition is observed through the observation port 17, the observation port 17 is made of acrylic glass, the observation port 17 is a transparent visual window, the common glass is easily broken under the influence of water pressure, the high-strength acrylic glass is selected to be made, the breakage is prevented, the maintenance cost caused by the breakage is reduced, the sedimentation efficiency is influenced, the electromagnetic valve II 14 corresponding to the oil drain port 13 above layering is selected to drain mineral oil into the main pipeline 16 to lead to a flocculation separation tank, the sedimentation impurities are prevented from being pumped and diffused into the oil drain pipe 15 and the main pipeline 16, the abrasion to the oil drain pipe 15 and the main pipeline 16 is greatly reduced, the filter screen 10 is fixedly arranged on each of the plurality of oil drain ports 13, the large-particle metal is filtered by the filter screen 10 in the initial sedimentation stage, the large-particle metal impurities are prevented from being attached to the electromagnetic valve II 14, further reduce metal impurity and get into oil drain pipe 15 and trunk line 16, reduce to oil drain pipe 15 and trunk line 16 wearing and tearing, oil drain pipe 15 compares in oil drain port 13 downward sloping thirty degrees, settling tank 1 is general great, the process of oil extraction needs the time extension, inclination, waste mineral oil forced flow goes into oil drain pipe 15, receive gravity equally, liquid flows to the lower place after settling tank 1 inside discharge upper strata waste mineral oil, surplus waste water and waste metal piece in settling tank 1, in order to be convenient for discharge waste water and waste metal piece, settling tank 1 tank bottom axle center department's motor 18 drive rotation axis 19, thereby drive the scraper blade 20 of brushing the inboard diapire of settling tank 1, scraper blade 20 is concentrated and is discharged from scum 21, if scraper blade 20 is perpendicular with the rotation axis 19 surface, motor 18 drive rotation axis 19 and scraper blade 20 rotate, the metal piece of scraping can be influenced by centrifugal force to outside, set up scraper blade 20 and deviate from the axle center thirty degrees of rotation axis 19 relatively, the thickness of waste metal piece 20 keeps away from one end of rotation axis 19 gradually increases, waste metal piece receives the power of scraper blade 20, remove to the waste metal piece along the inclined plane direction greatly, and the waste metal piece of flocculation treatment efficiency has been reduced after the waste metal piece has been got into the waste water and has been separated to the waste metal piece, flocculation treatment of the waste metal piece has been greatly improved.
The electric elements are all connected with an external main controller and 220V mains supply through a transformer, and the main controller can be conventional known equipment for controlling a computer and the like.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (1)
1. A system for recycling waste mineral oil, comprising: the waste oil raw material tank is sequentially connected with a precipitation tank (1), a flocculation separation tank, a distillation device, a nanofiltration device and a finished oil storage device through pipelines;
characterized by further comprising:
the tank body heating device is fixedly arranged on the precipitation tank (1);
the electromagnetic adsorption device is fixedly arranged on the precipitation tank (1);
the tank body heating device comprises a water storage interlayer (2) arranged in the tank wall of the precipitation tank (1), the water storage interlayer (2) is full of hot water, and the hot water is heated by waste heat of the distillation device;
the water inlet (3) extending to the water storage interlayer (2) is formed in the upper end of the outer side wall of the precipitation tank (1), the water pipe I (4) is fixedly connected to the water inlet (3), the water pump (5) is fixedly installed on the water pipe I (4), the water outlet (6) extending to the water storage interlayer (2) is formed in the lower end of the outer side wall of the precipitation tank (1), the water outlet (6) is fixedly connected with the water pipe II (8), the electromagnetic valve I (9) is fixedly installed on the water pipe II (8), the heating boiler (7) is fixedly installed between one end, far away from the water inlet (3), of the water pipe I (4) and one end, far away from the water outlet (6), of the water pipe II (8), and the heating boiler (7) is heated by waste heat of the distillation device;
a plurality of temperature control switches (11) for controlling the water temperature in the water storage interlayer (2) are uniformly and fixedly arranged in the water storage interlayer (2), and the temperature control switches (11) are electrically connected to the water pump (5) and the electromagnetic valve I (9);
the outer side walls of the first water pipe (4), the second water pipe (8) and the sedimentation tank (1) are all wrapped with heat insulation materials;
the electromagnetic adsorption device comprises a plurality of electromagnets (12) which are uniformly and fixedly arranged on the outer side face of the tank bottom of the precipitation tank (1), and the tank bottom of the precipitation tank (1) is a conical surface;
a plurality of oil drain ports (13) are uniformly formed in the position, deviating from the water storage interlayer (2), of the precipitation tank (1), the oil drain ports (13) are fixedly connected with the input end of a solenoid valve II (14), oil drain pipes (15) are fixedly arranged at the output end of the solenoid valve II (14), one ends, far away from the solenoid valve II (14), of the oil drain pipes (15) are commonly connected to a main pipeline (16), the oil drain pipes (15) incline downwards for thirty degrees compared with the oil drain ports (13), one ends, far away from the oil drain pipes (15), of the main pipeline (16) are connected to a flocculation separation tank, an observation port (17) for observing liquid layering is formed in the position, deviating from the water storage interlayer (2), of the side wall of the precipitation tank (1), the observation port (17) is located short of the oil drain ports (13), and the observation port (17) is made of acrylic glass;
the plurality of oil drain ports (13) are fixedly provided with filter screens (10);
a motor (18) is fixedly arranged at the lower side of the shaft center of the tank bottom of the precipitation tank (1), a rotating shaft (19) is fixedly arranged at the output end of the motor (18), a scraping plate (20) is fixedly arranged on the side wall of the rotating shaft (19), a slag discharging pipe (21) is fixedly arranged at the position, deviating from the rotating shaft (19), of the tank bottom of the precipitation tank (1), and a valve (22) is fixedly arranged on the slag discharging pipe (21);
opening a first electromagnetic valve (9), enabling heated hot water in the water storage interlayer (2) to flow from a second water pipe (8) to a heating boiler (7) for reheating, so that waste mineral oil in the precipitation tank (1) is indirectly heated by the hot water in the water storage interlayer (2) in a certain temperature interval, uniformly and fixedly arranging a plurality of temperature control switches (11) for controlling the water temperature in the water storage interlayer (2), electrically connecting the plurality of temperature control switches (11) to the water suction pump (5) and the first electromagnetic valve (9), setting the temperature control switches (11) to keep the closed state of the water suction pump (5) and the first electromagnetic valve (9) when the water temperature is maintained between seventy degrees and ninety degrees, controlling the water suction pump (5) and the first electromagnetic valve (9) to open if the water temperature is higher than ninety degrees or lower, opening the electromagnetic valve to discharge the heated water in the water storage interlayer (2), arranging the temperature control switches (11) at different positions in the water storage interlayer (2), and possibly replacing the water temperature (9) when the water temperature in the water storage interlayer (2) is not higher than ninety degrees;
mineral oil is discharged from an oil discharge port (13) above layering through a corresponding solenoid valve II (14) to a main pipeline (16) and led into a flocculation separation tank, precipitated impurities are prevented from being pumped to diffuse into the oil discharge pipe (15) and the main pipeline (16), a plurality of oil discharge ports (13) are fixedly provided with filter screens (10), the filter screens (10) are used for filtering large-particle metal in the initial stage of sedimentation, the large-particle metal impurities are prevented from being attached to the solenoid valve II (14), and the metal impurities are prevented from entering the oil discharge pipe (15) and the main pipeline (16);
the scraping plate (20) deviates from the axis center of the rotating shaft (19) by thirty degrees, and the thickness of one end, far away from the rotating shaft (19), of the scraping plate (20) is gradually increased.
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