CN113234478B - Device and method for asphalting waste engine oil residues and application - Google Patents
Device and method for asphalting waste engine oil residues and application Download PDFInfo
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- CN113234478B CN113234478B CN202110572553.4A CN202110572553A CN113234478B CN 113234478 B CN113234478 B CN 113234478B CN 202110572553 A CN202110572553 A CN 202110572553A CN 113234478 B CN113234478 B CN 113234478B
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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
- C10G53/14—Treatment of hydrocarbon oils, in the absence of hydrogen, by two or more refining processes plural serial stages only including at least one oxidation step
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10C—WORKING-UP PITCH, ASPHALT, BITUMEN, TAR; PYROLIGNEOUS ACID
- C10C3/00—Working-up pitch, asphalt, bitumen
- C10C3/02—Working-up pitch, asphalt, bitumen by chemical means reaction
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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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Abstract
The invention provides a device, a method and application for asphaltizing waste engine oil residues, wherein the device comprises the following components: the REOB reaction system comprises a first heating furnace and a reaction tower, wherein the reaction tower is communicated with the first heating furnace, receives the doping agent, the PH regulator and the waste engine oil residues heated by the first heating furnace, and processes the waste engine oil residues to obtain waste engine oil residue processing oil; the vacuum distillation system is communicated with the reaction tower, receives the atmospheric residue and the waste engine oil residue treatment oil output by the reaction tower, and carries out vacuum distillation treatment on the waste engine oil residue treatment oil to obtain deep vacuum residue; and the deep oxidation system is communicated with the vacuum distillation system, receives the deep vacuum residue output by the vacuum distillation system, and performs deep oxidation on the deep vacuum residue to obtain the target asphalt. The invention can improve the yield of the asphalt, does not cause harm to the surrounding environment, and can also improve the yield and the oxidation efficiency of the reduced pressure distillation process.
Description
Technical Field
The invention relates to the technical field of dangerous waste resource recycling and petroleum product processing, in particular to a device and a method for asphalting waste engine oil residues and application of the device and the method.
Background
The engine oil is deteriorated in function due to consumption of additives, oxidation, mixing of wear products and contaminants, and moisture absorption during use, and is discarded as waste engine oil (REO) due to failure. By recycling the waste engine oil, 70 to 80% of the waste engine oil can be effectively used, and the remaining 20 to 30% of the waste engine oil becomes a waste engine oil Residue (REOB). Through relevant detection, the main components of REOB are light components such as aroma components and saturated components, and the light components are also important components for composing asphalt; in addition, REOB also contains impurities such as heavy metal ions, waste acid, chemical additives, sludge and the like. At present, the common processing mode of REOB is direct abandonment, which is not only unfavorable for the recycling of the abandoned engine oil residues and causes resource waste, but also causes serious harm to the natural environment due to the random abandonment of the abandoned engine oil residues. Therefore, rationalizing the disposal and efficient recycling of REOB is an important issue for the future solution and disposal of REOB.
Along with the development of highway construction in China, the demand of road asphalt is always large, and according to statistics, the consumption of petroleum asphalt in China breaks through 5000 million tons in recent years, wherein most of asphalt is used for road construction. The asphalt commonly used for road construction is a product obtained by petroleum after refining, and the production method comprises a distillation method, a solvent deasphalting method, a residual oil shallow oxidation method, a blending method and the like. The engine oil and the asphalt are homologous and are crude oil refining products, the composition of the engine oil and the asphalt is very close to that of the asphaltene, and a conglomerated asphalt colloid structure taking the asphaltene as a core can be formed under the condition of hot oxygen, so that the REOB asphaltization has a theoretical basis, however, the component content in the REOB is greatly different from that of the asphalt, and meanwhile, more impurities exist in the REOB, so that the REOB is restricted to be converted into the asphalt for recycling, and at present, the REOB asphaltization is difficult to realize: (1) The REOB contains more impurities, which not only affects the asphalt yield, but also causes pollution to the surrounding environment by the heavy metal ions contained in the asphalt pavement paved by the REOB; (2) The REOB still contains part of light oil components, and how to deeply extract and distill the light oil components is one of key problems to be solved; (3) REOB is complex in source and mostly contains antioxidants and the like, so that the asphalt production effect by using an oxidation process is poor, and the key problem of improving the asphalt yield is to set oxidation parameters and improve oxidation equipment.
Disclosure of Invention
In view of this, the present invention provides an apparatus, a method and an application for asphalting waste engine oil residues, which aim to solve the above problems.
In one aspect, the present invention provides an apparatus for asphalting waste engine oil residue, the apparatus comprising: the REOB reaction system comprises a first heating furnace and a reaction tower, wherein the reaction tower is communicated with the first heating furnace and is used for receiving the doping agent, the PH regulator and the waste engine oil residues heated by the first heating furnace so as to treat the waste engine oil residues to obtain waste engine oil residue treatment oil; the vacuum distillation system is communicated with the reaction tower and is used for receiving the atmospheric residue and the waste engine oil residue treatment oil output by the reaction tower so as to carry out vacuum distillation treatment on the waste engine oil residue treatment oil to obtain deep vacuum residue; and the deep oxidation system is communicated with the vacuum distillation system and is used for receiving the deep vacuum residue output by the vacuum distillation system and carrying out deep oxidation on the deep vacuum residue to obtain the target asphalt.
Further, in the device for asphaltizing the waste engine oil residues, the reaction tower is provided with a first inlet for receiving the heated waste engine oil residues, a second inlet for receiving the admixture, a third inlet for receiving the pH regulator and a treatment oil outlet for outputting the treatment oil of the waste engine oil residues, and the first inlet and the second inlet are both arranged at the top of the reaction tower; the stirring device, the baffle and the screen are sequentially arranged in the reaction tower along the self axial direction, the stirring device is arranged close to the top of the reaction tower, the baffle is provided with a pore passage capable of being opened and closed, an oversize residue outlet is formed in the side wall of the reaction tower between the baffle and the screen, and a third inlet is formed in the side wall of the reaction tower between the screen and the bottom of the reaction tower.
Further, in the apparatus for asphaltizing waste engine oil residue, the vacuum distillation system includes: the second heating furnace, the reduced pressure distillation tower and the light oil tank are communicated in sequence, and the second heating furnace is also communicated with the reaction tower.
Further, in the apparatus for asphaltizing waste engine oil residue, the deep oxidation system includes: the third heating furnace is communicated with the reduced pressure distillation system and is used for receiving and heating the deep reduced pressure residual oil output by the reduced pressure distillation system; the deep oxidation tower is communicated with the third heating furnace and is used for receiving and deeply oxidizing the heated deep decompression slag output by the third heating furnace; the air compression system is communicated with the deep oxidation tower so as to introduce air into the deep oxidation tower; and the temperature control pipeline is arranged in the deep oxidation tower, and the deep oxidation tower is provided with a temperature control circulating inlet and a temperature control circulating outlet which are communicated with the temperature control pipeline.
Further, in the apparatus for asphaltizing waste engine oil residue, the deep oxidation system further includes: the spiral tower plate of ladder, the tower plate is around temperature control pipeline and along temperature control pipeline's axial spiral setting, and the plane of ladder is 15 with the contained angle of horizontal plane, and tongue shape trompil has been seted up to the vertical face of ladder.
Further, the apparatus for asphaltizing waste engine oil residues further includes: and the tail gas recovery system is communicated with the reduced pressure distillation system, the deep oxidation system and the first heating furnace so as to recover tail gas generated by the reduced pressure distillation system and the deep oxidation system and convey the tail gas to the low-pressure heating furnace.
In the invention, the waste engine oil residues and the additive are mixed and react, so that the waste engine oil residues and impurities in the waste engine oil residues are separated, 80-90% of the waste engine oil residues can be converted into asphalt, and the asphalt yield is improved; the pH regulator is used for regulating the pH value of the asphalt, so that the produced asphalt product is pure, has no corrosiveness and cannot cause harm to the surrounding environment; the waste engine oil residues are mixed with the atmospheric residue oil, so that the effect of mixed cracking is achieved, light oil content which is difficult to fractionate in the waste engine oil residues can be obtained through reduced pressure distillation, the yield of the reduced pressure distillation process is improved, and the energy consumption is low; the deep oxidation system can carry out deep oxidation on the deep vacuum residue, and improves the oxidation efficiency.
In another aspect, the present invention also provides a method for asphalting waste engine oil residue, the method comprising the steps of: mixing the waste engine oil residues with an additive, and mixing the mixed substance with a pH regulator to obtain waste engine oil residue treatment oil with the pH value consistent with that of asphalt and without corrosive ions; mixing the waste engine oil residue treatment oil with the atmospheric residue oil, and sequentially heating and distilling the mixed substances under reduced pressure to obtain deep vacuum residue oil; and carrying out deep oxidation on the deep vacuum residue to obtain the target asphalt.
Further, in the above method for asphaltizing waste engine oil residues, the PH adjusting agent is one or a combination of two of aluminum hydroxide and sodium metaborate; and/or the admixture is an ionic adsorbent and a solid waste adhesive.
Further, in the method for asphalting the waste engine oil residue, the atmospheric residue is heavy oil obtained from the bottom of a distillation tower by distilling crude oil under normal pressure, and the mixing amount of the atmospheric residue is 10 to 40 percent of the waste engine oil residue; and/or the deep vacuum residue is the residue of a mixture of waste engine oil residue and atmospheric residue taken off at the bottom of the vacuum distillation column.
According to the invention, firstly, impurities in the waste engine oil residues are separated to obtain the waste engine oil residue treatment oil, 80% -90% of the waste engine oil residues can be converted into asphalt, the asphalt yield is improved, the pH value of the asphalt is adjusted by using the PH regulator, and the produced asphalt product is pure and non-corrosive, and cannot cause harm to the surrounding environment; then mixing the waste engine oil residue treatment oil with the atmospheric residue oil, heating and distilling under reduced pressure to achieve a mixed cracking effect, obtaining light oil content which is difficult to fractionate in the waste engine oil residue through reduced pressure distillation, improving the yield of the reduced pressure distillation process, and obtaining deep reduced pressure residue oil and light oil with low energy consumption; and finally, deeply oxidizing the deep vacuum residue to finally obtain an asphalt product, wherein industrial waste residues generated in the old engine oil treatment industry with strong environmental hazard can be effectively utilized, and the road asphalt produced by utilizing the deep vacuum residue can reach the standard issued by the JTG F40-2004 department, so that the high-efficiency utilization of wastes is realized, the environmental pollution is reduced, the sustainable development of economy and society is facilitated, and the deep vacuum residue can be widely applied to the fields of reutilization of waste engine oil residues and asphaltization of the waste engine oil residues.
On the other hand, the inventor also provides an application of the device and the method in the field of the asphalting of the waste engine oil residues.
Drawings
Various additional advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
FIG. 1 is a schematic structural diagram of an apparatus for asphalting waste oil residues according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a reaction tower in an apparatus for asphalting waste oil residues according to an embodiment of the present invention;
FIG. 3 is a schematic diagram showing an external structure of a deep oxidation tower in an apparatus for asphalting waste oil residues according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of the internal structure of a deep oxidation tower in the apparatus for asphalting waste oil residues according to the embodiment of the present invention;
FIG. 5 is a schematic cross-sectional view of a tray in an apparatus for asphaltizing waste oil residues according to an embodiment of the present invention;
FIG. 6 is a schematic view of a tongue-shaped opening in an apparatus for asphalting waste oil residue according to an embodiment of the present invention;
fig. 7 is a flow chart of a method for asphalting waste oil residue according to an embodiment of the present invention.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
The waste engine oil used by the invention is all from steel rolling equipment; the waste engine oil residue is the residue of waste engine oil after centrifugal separation and molecular distillation.
The embodiment of the device comprises:
referring to fig. 1, fig. 1 shows a preferred structure of the apparatus for asphalting waste oil residue provided in the present embodiment. As shown in fig. 1, the apparatus includes: the REOB reaction system 1, the reduced pressure distillation system 2 and the deep oxidation system 3, wherein the REOB reaction system 1 comprises a first heating furnace 101 and a reaction tower 102, and the first heating furnace 101, the reaction tower 102, the reduced pressure distillation system 2 and the deep oxidation system 3 are communicated in sequence. The first heating furnace 101 receives the waste engine oil residues, heats the waste engine oil residues, controls the temperature of the waste engine oil residues, the heated waste engine oil residues flow into the reaction tower 102, meanwhile, the reaction tower 102 also receives an additive and a pH regulator, and the mixture of the waste engine oil residues and the additive is mixed with the pH regulator to obtain the waste engine oil residue treatment oil with the pH value consistent with that of asphalt and without corrosive ions. The vacuum distillation system 2 receives the waste engine oil residue treatment oil output from the reaction tower 102, and also receives the atmospheric residue, and the waste engine oil residue treatment oil is mixed with the atmospheric residue, and the vacuum distillation system 2 sequentially heats and vacuum-distills the mixture of the waste engine oil residue treatment oil and the atmospheric residue, thereby obtaining the deep vacuum residue. And the deep oxidation system 3 receives the deep vacuum residue output by the vacuum distillation system 2, and performs deep oxidation on the deep vacuum residue to finally obtain the target asphalt.
In the embodiment, the waste engine oil residues and the additive are mixed and react, so that the waste engine oil residues and impurities in the waste engine oil residues are separated, 80-90% of the waste engine oil residues can be converted into asphalt, and the asphalt yield is improved; the pH regulator is used for regulating the pH value of the asphalt, so that the produced asphalt product is pure, has no corrosiveness and cannot cause harm to the surrounding environment; the waste engine oil residues are mixed with the atmospheric residue oil, so that the mixed cracking effect is achieved, light oil which is difficult to fractionate in the waste engine oil residues can be obtained through reduced pressure distillation, the yield of the reduced pressure distillation process is improved, and the energy consumption is low; the deep oxidation system can carry out deep oxidation on the deep vacuum residue, and improves the oxidation efficiency.
Referring to fig. 2, the reaction tower 102 is further provided with a first inlet 1021, a second inlet 1022, a third inlet 1023 and a treated oil outlet 1025 for receiving the heated waste engine oil residue, the admixture, the pH adjuster and the treated oil for outputting the waste engine oil residue, respectively, wherein the first inlet 1021 and the second inlet 1022 are disposed at the top of the reaction tower 102. The stirring device 1026, the baffle 1027 and the screen 1028 are sequentially arranged inside the reaction tower 102 along the axial direction, that is, the stirring device 1026, the baffle 1027 and the screen 1028 are sequentially arranged inside the reaction tower 102 from top to bottom (relative to fig. 2), the stirring device 1026 is arranged near the top of the reaction tower 102, the baffle 1027 is provided with a hole 1029 capable of controlling opening and closing, the hole diameter of the screen 1028 is 0.6mm to 1.18mm, specifically, a vibrating motor 1030 and a spring 1031 are arranged on two sides of the screen 1028, so that the screen 1028 can vibrate in the up-down direction. An oversize residue discharge port 1024 is formed in the side wall, located between the baffle 1027 and the screen 1028, of the reaction tower 102, a third inlet 1023 is formed in the side wall, located between the screen 1028 and the bottom of the reaction tower 102, the third inlet 1023 is used for inputting a pH regulator into the reaction tower 102 and enabling the pH regulator and the heated waste engine oil residue to enter the reaction tower 102 and then to be fully mixed with an additive through a stirring device 1026, after harmful ions and other impurities in REOB and the additive fully react, a hole 1029 in the baffle 1027 is opened, the waste engine oil residue flows onto a screen 1028 which vibrates up and down along the hole 1029, the waste engine oil residue treatment oil filtered by the screen 1028 infiltrates to the bottom of the reaction tower 102, the impurities in the waste engine oil residue are left on the screen 1028 and are discharged through an oversize residue discharge port 1024, and pure waste engine oil residue is mixed with a proper amount of the pH regulator to obtain waste engine oil residue treatment oil which is consistent in acid with asphalt and free of corrosive ions.
Referring again to fig. 1, the vacuum distillation system 2 includes a second heating furnace 201, a vacuum distillation tower 202 and a light oil tank 203 which are communicated in sequence, and the second heating furnace 201 is also communicated with a treated oil outlet 1025 of the reaction tower 102 to receive the treated oil of the waste engine oil residue output from the reaction tower 102. Mixing the waste engine oil residue treatment oil with the atmospheric residue, then feeding the mixture into a second heating furnace 201, heating the mixture to the required temperature by the second heating furnace 201, then conveying the mixture to a vacuum distillation tower 202, carrying out vacuum distillation by the vacuum distillation tower 202, collecting the light oil component from the top of the tower to a light oil tank 203, and obtaining the deep vacuum residue at the bottom of the tower.
The deep oxidation system 3 comprises a third heating furnace 301, a deep oxidation tower 302, an air compression system 303 and a temperature control pipeline 3026, wherein the third heating furnace 301 is communicated with the bottom of the vacuum distillation tower 202, referring to fig. 3, the top of the deep oxidation tower 302 is provided with a residual oil inlet 3021 and a tail gas outlet 3022, and the residual oil inlet 3021 is communicated with the third heating furnace 301. The bottom of the deep oxidation tower 302 is provided with an air inlet 3025, and the air inlet 3025 is communicated with the air compression system 303. A temperature control circulation outlet 3023 is further arranged at a position close to the top of the deep oxidation tower 302, a temperature control circulation inlet 3024 is further arranged at a position close to the bottom of the deep oxidation tower 302, referring to fig. 4, a temperature control pipeline 3026 is further coaxially arranged in the deep oxidation tower 302, the top end and the bottom end of the temperature control pipeline 3026 are respectively communicated with the temperature control circulation outlet 3023 and the temperature control circulation inlet 3024, and the bottom of the deep oxidation tower 302 is also communicated with the asphalt product tank 304. Referring to fig. 4 and 5, a stepped spiral tower plate 3027 is further arranged in the deep oxidation tower 302, the tower plate 3027 surrounds the temperature control pipeline 3026 and is spirally arranged along the axial direction of the temperature control pipeline 3026, and the contact area of the deep vacuum residue and the air can be increased by the step-shaped surface of the tower plate 3027. The included angle between the plane of the ladder and the horizontal plane is 10-20 degrees, preferably 15 degrees, which is convenient for the deep vacuum residue to flow to the tower bottom. Referring to fig. 6, a plurality of tongue-shaped openings 3028 are formed on the vertical surface of the step, and air may pass through the tongue-shaped openings 3028 to brush the surface of the deep vacuum residue, thereby improving the oxidation efficiency. The third heating furnace 301 heats the received deep vacuum residue to 250-280 deg.C, anddelivering to the top of the deep oxidation tower 302 via pipeline, flowing deep vacuum residue downwards along the stepped spiral tower plate 3027, blowing air into the deep oxidation tower 302 via the air compression system 303 via the tower bottom air inlet port 3025, and controlling the ventilation amount to be 0.15m 3 /Kg.h～0.35m 3 Kg.h, the flow direction of the air rises along the tower plate 3027 step by step and is opposite to the flow direction of the deep vacuum residue, the contact area of the deep vacuum residue and the air is increased by the step spiral tower plate 3027 to play a role in deep oxidation, the component at the bottom of the tower obtained after the deep oxidation is the target asphalt and is conveyed to the asphalt product tank 304 for storage through a pipeline, the cold circulating oil is pumped to the temperature control circulating inlet 3024 by the temperature control circulating system 305 and is discharged from the temperature control circulating outlet 3023 through the temperature control pipeline 3026, and then the cold circulating oil enters the asphalt product tank 304 through a pipeline to control the residual oil oxidation process and the temperature of the asphalt product tank 304.
Referring to fig. 1 again, the apparatus further includes a tail gas recovery system 4, during operation of the apparatus, tail gases generated by the vacuum distillation tower 202 and the deep oxidation tower 302 are collected at the top of the tower, a gas inlet of the tail gas recovery system 4 is communicated with a tail gas outlet port 3022 of the vacuum distillation tower 202 and the deep oxidation tower 302 to recover the tail gases generated in the vacuum distillation tower 202 and the deep oxidation tower 302, and a gas outlet of the tail gas recovery system 4 is further communicated with the first heating furnace 101, the second heating furnace 201 and the third heating furnace 301 to enable the first heating furnace 101, the second heating furnace 201 and the third heating furnace 301 to use the tail gases for combustion.
In conclusion, in the embodiment, the waste engine oil residues and the doping agent are mixed and reacted, so that the waste engine oil residues and impurities in the waste engine oil residues are separated, 80-90% of the waste engine oil residues can be converted into asphalt, and the asphalt yield is improved; the pH regulator is used for regulating the pH value of the asphalt, so that the produced asphalt product is relatively pure and has no corrosivity, and the harm to the surrounding environment is avoided; the waste engine oil residues are mixed with the atmospheric residue oil, so that the effect of mixed cracking is achieved, light oil content which is difficult to fractionate in the waste engine oil residues can be obtained through reduced pressure distillation, the yield of the reduced pressure distillation process is improved, and the energy consumption is low; the deep oxidation system can carry out deep oxidation on the deep vacuum residue, particularly, the stepped spiral tower plate increases the contact area of the deep vacuum residue and air, and the oxidation efficiency is improved by combining corresponding oxidation parameters such as oxidation temperature, ventilation quantity and the like.
The method comprises the following steps:
referring to fig. 7, fig. 7 shows a flowchart of a method for asphalting waste engine oil residue provided in this embodiment, where the method is implemented by using an apparatus provided in the apparatus embodiment, and a specific implementation of the apparatus may be implemented by referring to the apparatus embodiment described above, and details are not repeated here. As shown in fig. 7, the method includes the steps of:
and an REOB reaction step S710, mixing the waste engine oil residues with an additive, and mixing the mixed substance with a pH regulator to obtain the waste engine oil residue treated oil with the pH value consistent with that of the asphalt and without corrosive ions.
Specifically, the waste engine oil residues are sent into a first heating furnace 101, the waste engine oil residues enter a reaction tower 102 from a first inlet 1021 after the temperature reaches 160 ℃, meanwhile, an admixture enters the reaction tower 102 through a second inlet 1022, the waste engine oil residues and the admixture are fully mixed through a stirring device 1026, after harmful ions and other impurities in the waste engine oil residues fully react with the admixture, a hole 1029 on a baffle 1027 is opened, the waste engine oil residues flow onto a screen 1028 which vibrates up and down along the hole 1029, the waste engine oil residue treatment oil filtered by the screen 1028 seeps to the bottom of the tower, impurities in the waste engine oil residues are left on the screen 1028 and discharged through a residue discharge hole 1024 on the screen, and the waste engine oil residues are mixed with a proper amount of a pH regulator, so that the waste engine oil residue treatment oil with the pH value consistent with asphalt and without corrosive ions is obtained. Wherein the waste engine oil residue is industrial waste residue generated after the waste engine oil is recycled and processed; the pH regulator is one or the combination of two materials of aluminum hydroxide and sodium metaborate, and is used for controlling the pH value of the waste engine oil residue treatment oil to be consistent with that of asphalt; the admixture is an ion adsorbent and a solid waste adhesive, preferably, the ion adsorbent is polyacrylamide, and the admixture proportion of the polyacrylamide is 3% -5% of the waste engine oil residue, as proved by the test in the table 1, the ionic adsorption effect is better in the range of the admixture proportion, the solid waste adhesive is sepiolite, and the admixture proportion of the sepiolite is 3% -8% of the waste engine oil residue, as proved by the test in the table 2, the effect of the solid waste adhesion in the range of the admixture proportion is better.
TABLE 1 Table of the effect of different ion adsorbent doping amounts on ion adsorption
Table 2 effect of different solid waste adhesive dosage on adhesion of solid waste particles
And a reduced pressure distillation step S720, mixing the waste engine oil residue treatment oil with the atmospheric residue, and sequentially heating and distilling the mixed substances under reduced pressure to obtain the deep reduced pressure residue.
Specifically, the pretreated waste engine oil residue treatment oil is discharged from a treatment oil outlet 1025, mixed with atmospheric residue, heated to a required temperature by a second heating furnace 201, and then conveyed to a vacuum distillation tower 202, and the vacuum distillation parameters are set as follows: the feeding temperature is 380 ℃, the overhead temperature is 70 ℃, the condensation temperature is 40 ℃, the feeding pressure is 34kPa, the overhead pressure is 4.0kPa, after reduced pressure distillation, the light oil component is collected from the overhead to the light oil tank 203, and the deep reduced pressure residual oil is obtained at the bottom of the tower. The atmospheric residue oil is heavy oil obtained from the bottom of a distillation tower by distilling crude oil at normal pressure, and the mixing amount of the heavy oil is 10 to 40 percent of the residue of the waste engine oil; the deep vacuum residue is residue oil extracted from the mixture of waste engine oil residue and atmospheric residue oil at the bottom of the vacuum distillation tower 202; the light oil is a raw material for preparing fuel oil and engine oil by fractionating a mixture of waste engine oil residue and atmospheric residue in the vacuum distillation tower 202.
And a deep oxidation step S730, wherein deep oxidation is carried out on the deep vacuum residue to obtain the target asphalt.
In particular to a deep vacuum residue channelThe peroxidation heating furnace 301 is heated to 250-280 ℃, the heated product is conveyed to the top of the deep oxidation tower 302 through a pipeline, the deep vacuum residue flows downwards along a step-shaped spiral tower plate 3027 step by step, an air compression system 303 blows air into the deep oxidation tower 302 from an air inlet at the bottom of the tower, and the ventilation quantity is controlled to be 0.15m 3 /Kg.h～0.35m 3 The oxidation effect is better in the range, as proved by the test in table 3, the flow direction of the air rises along the step-shaped spiral tower plate 3027 step by step and is opposite to the flow direction of the deep vacuum residue, the step-shaped spiral tower plate 3027 increases the contact area of the deep vacuum residue and the air, the deep oxidation is performed, the component at the bottom of the tower obtained after the deep oxidation is the target asphalt, the target asphalt is conveyed to the asphalt product tank 304 through a pipeline for storage, the temperature control circulation system 305 pumps the cold circulating oil to the temperature control circulation inlet 3024, the cold circulating oil is discharged from the temperature control circulation outlet 3023 through the temperature control pipeline 3026, and then the cold circulating oil enters the asphalt product tank 304 through a pipeline for controlling the oxidation process of the residue and the temperature of the asphalt product tank 304.
TABLE 3 table for detecting oxidation effect of different ventilation
And a tail gas recovery step S740 of recovering tail gas generated in the vacuum distillation process and the deep oxidation process.
Specifically, during the operation of the apparatus, the off-gases generated by the vacuum distillation tower 202 and the deep oxidation tower 302 are collected at the top of the respective towers, and are recovered and transported to the first heating furnace 101, the second heating furnace 201 and the third heating furnace 301 for combustion and utilization.
Example 1
The method for producing No. 70 road petroleum asphalt by using waste engine oil residues is used for stirring and preparing hot-mix asphalt mixture, and according to the technical scheme of the embodiment, the specific implementation steps of the embodiment are as follows:
(1) REOB reaction
The waste engine oil residues are sent into a first heating furnace 101, the waste engine oil residues enter a reaction tower 102 from a first inlet 1021 after the temperature reaches 160 ℃, meanwhile, an additive enters the reaction tower 102 through a second inlet 1022, the waste engine oil residues and the additive are fully mixed through a stirring device 1026, after harmful ions and other impurities in the waste engine oil residues and the additive fully react, a hole 1029 on a baffle 1027 is opened, the waste engine oil residues flow onto a screen 1028 which vibrates up and down along the hole 1029, waste engine oil residue treatment oil filtered by the screen 1028 seeps to the bottom of the tower, impurity screen 1028 in the waste engine oil residues is left on a screen 1028 and discharged through a residue discharge hole 1024 on the screen, and the waste engine oil residues under the screen 1028 are mixed with a pH regulator to obtain waste engine oil residue treatment oil with the pH value consistent with No. 70 road petroleum asphalt and without corrosive ions. The pH regulator is aluminum hydroxide; the admixture is an ion adsorbent and a solid waste adhesive, wherein the ion adsorbent is polyacrylamide, the admixture proportion of the ion adsorbent is 3% of the waste engine oil residue, and the solid waste adhesive is sepiolite, the admixture proportion of the solid waste adhesive is 3% of the waste engine oil residue.
(2) Distillation under reduced pressure
The pretreated waste engine oil residue treatment oil is discharged from a treatment oil outlet, mixed with atmospheric residue, heated to a required temperature by a second heating furnace 201, and then conveyed to a vacuum distillation tower 202, and the vacuum distillation parameters are set as follows: the feeding temperature is 380 ℃, the overhead temperature is 70 ℃, the condensation temperature is 40 ℃, the feeding pressure is 34kPa, the overhead pressure is 4.0kPa, after reduced pressure distillation, the light oil component is collected from the overhead to the light oil tank 203, and the deep reduced pressure residual oil is obtained at the bottom of the tower. Wherein the atmospheric residue oil is 'Qilu' commodity residue oil produced by Chinese petrochemical Qilu petrochemical company, and is heavy oil obtained from the bottom of a distillation tower by distilling crude oil at normal pressure, and the mixing amount of the heavy oil is 10 percent of the residue of the waste engine oil.
(3) Deep oxidation
The deep vacuum residue is heated to 250 ℃ by an oxidation heating furnace 301, is conveyed to the top of a deep oxidation tower 302 by a pipeline, flows downwards step by step along a stepped spiral tower plate 3027, and is blown into the deep oxidation tower 302 from an air inlet at the bottom of the tower by an air compression system 303, wherein the ventilation quantity is controlled to be 0.15m 3 H tower with air flow direction along step spiralThe plate 3027 rises gradually and is opposite to the flow direction of the deep vacuum residue, the contact area of the deep vacuum residue and air is increased by the aid of the stepped spiral tower plate 3027, deep oxidation is achieved, a tower bottom component obtained after deep oxidation is target asphalt and is conveyed to the asphalt product tank 304 through a pipeline for storage, the temperature control circulating system 305 pumps cold circulating oil to the temperature control circulating inlet 3024, the cold circulating oil is discharged from the temperature control circulating outlet 3023 through the temperature control pipeline 3026 and then enters the asphalt product tank 304 through a pipeline so as to control the temperature of the residue oil oxidation process to be 250 +/-5 ℃, and the temperature of the asphalt product tank 304 is controlled to be 130-150 ℃.
(4) Tail gas recovery
During the operation of the device, the tail gas generated by the vacuum distillation tower 202 and the deep oxidation tower 302 is gathered at the top of each tower, recovered by pipelines and conveyed to the first heating furnace 101, the second heating furnace 201 and the third heating furnace 301 for combustion and utilization.
The target asphalt is obtained by the device through the steps and is used for stirring the hot-mix asphalt mixture, and the method comprises the following steps:
(1) Material preparation
Weighing materials such as aggregate, mineral powder and the like according to requirements, heating to 180 ℃ for later use, and heating the target asphalt obtained in the embodiment to 135 ℃ for later use;
(2) Mixing material
Adding the required mineral aggregate into a mixing pot, dry-mixing for 30 seconds, then adding the required target asphalt, mixing for 90 seconds, finally adding the mineral powder, stirring for 60 seconds, and controlling the mixing temperature to be 160 ℃;
(3) Molding test piece
The hot-mix asphalt mixture is obtained after mixing, a Marshall compaction tester is adopted to form a test piece, and the quality detection is carried out according to the technical Specification for construction of road asphalt pavement JTG F40-2004 issued by the ministry of technical standards.
Example 2
The method for producing No. 70 road petroleum asphalt by using waste engine oil residues is used for mixing and preparing a hot mix asphalt mixture, and according to the technical scheme of the invention, the specific implementation steps of the embodiment are the same as those of the embodiment 1, and the difference is that: the deep vacuum residue is added through a third heating furnace 301Heating to 260 deg.C, and controlling ventilation amount to 0.20m 3 Per Kg.h; the admixture is an ion adsorbent and a solid waste adhesive, wherein the ion adsorbent is polyacrylamide, the admixture proportion of the ion adsorbent is 4% of the waste engine oil residue, the solid waste adhesive is sepiolite, the admixture proportion of the solid waste adhesive is 4% of the waste engine oil residue, and the admixture amount of the atmospheric residue is 40% of the waste engine oil residue; the other materials were the same as in example 1.
The procedure for mixing the target asphalt with the hot-mix asphalt mixture was the same as in example 1.
Example 3
The method for producing No. 90 road petroleum asphalt by using waste engine oil residues is used for mixing and preparing a hot mix asphalt mixture, and according to the technical scheme of the invention, the specific implementation steps of the embodiment are the same as those of the embodiment 1, and the difference is that: heating the deep vacuum residue to 280 ℃ by a third heating furnace 301, and controlling the ventilation quantity to be 0.35m 3 The admixture is an ion adsorbent and a solid waste adhesive, wherein the ion adsorbent is polyacrylamide, the admixture proportion of the ion adsorbent is 5% of the waste engine oil residue, the solid waste adhesive is sepiolite, the admixture proportion of the solid waste adhesive is 8% of the waste engine oil residue, and the admixture amount of the atmospheric residue is 20% of the waste engine oil residue; the other materials were the same as in example 1.
The procedure for mixing the target asphalt with the hot-mix asphalt mixture was the same as in example 1.
In order to verify the beneficial effects of the embodiment, the applicant performs the following routine index tests, the conversion rate of the waste engine oil residue into asphalt and the test conditions on the asphalt produced by the waste engine oil residue in the embodiments 1 to 3 according to the standard of the technical specification for the construction of the asphalt pavement for roads (JTG F40-2004) issued by the ministry of transportation:
testing the instrument: a penetration meter, manufactured by the jinan speciality drafta equipment company; ductility instruments, manufactured by Wuxi municipal Petroleum instruments, equipment, inc.; a softening point tester manufactured by Beijing Zhongkejian electronic science and technology Limited; rotational viscometer, manufactured by Wuxi municipal Petroleum instruments, equipment, inc.; a film heating oven, manufactured by Shandong Luda Highway instruments; the Cleveland open cup flash point instrument is produced by geological instruments GmbH of Shanghai Changji; oven, manufactured by Shandongda Highway instruments Inc.
(1) Detection method
The test was carried out according to the road engineering asphalt and asphalt mixture test regulation of the Ministry of communications.
(2) The result of the detection
The results are shown in Table 1.
TABLE 4 asphalt general index test result table
TABLE 5 conversion of the asphaltene residue of waste engine oil
| Group of | Waste engine oil residue usage/t | Residual amount of waste engine oil/t | Conversion rate/% |
| Example 1 | 1.20 | 0.19 | 84 |
| Example 2 | 1.30 | 0.17 | 87 |
| Example 3 | 1.20 | 0.08 | 93 |
As can be seen from Table 4, the conventional indexes of the asphalt produced in examples 1-3 can reach the technical standard of No. 70 or No. 90 road petroleum asphalt, and meet the requirements of technical standard JTG F40-2004 promulgated by the Ministry of China. The method for asphalting the waste engine oil residues is feasible, and can fully utilize the waste engine oil residues to produce qualified asphalt products meeting the ministerial standards.
In conclusion, in the embodiment, the method comprises the steps of firstly separating impurities from the waste engine oil residues to obtain the waste engine oil residue treatment oil, converting 80-90% of the waste engine oil residues into the asphalt, so that the asphalt yield is improved, and the pH regulator is used for regulating the pH value of the asphalt, so that the produced asphalt product is pure and non-corrosive, and cannot cause harm to the surrounding environment; then mixing the waste engine oil residue treatment oil with the atmospheric residue oil, heating and distilling under reduced pressure to achieve a mixed cracking effect, obtaining light oil content which is difficult to fractionate in the waste engine oil residue through reduced pressure distillation, improving the yield of the reduced pressure distillation process, and obtaining deep reduced pressure residue oil and light oil with low energy consumption; and finally, deeply oxidizing the deep vacuum residue to finally obtain an asphalt product, wherein industrial waste residues generated in the old engine oil treatment industry with strong environmental hazard can be effectively utilized, and the road asphalt produced by utilizing the deep vacuum residue can reach the standard issued by the JTG F40-2004 department, so that the high-efficiency utilization of wastes is realized, the environmental pollution is reduced, the sustainable development of economy and society is facilitated, and the deep vacuum residue can be widely applied to the fields of reutilization of waste engine oil residues and asphaltization of the waste engine oil residues.
It should be noted that the principles of the apparatus and method of the present invention are the same and that the references are made to each other.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (8)
1. An apparatus for asphalting waste engine oil residue, comprising:
the REOB reaction system comprises a first heating furnace and a reaction tower, wherein the reaction tower is communicated with the first heating furnace and is used for receiving an additive, a PH regulator and waste engine oil residues heated by the first heating furnace so as to treat the waste engine oil residues to obtain waste engine oil residue treatment oil;
the vacuum distillation system is communicated with the reaction tower and is used for receiving atmospheric residue and waste engine oil residue treatment oil output by the reaction tower so as to carry out vacuum distillation treatment on the waste engine oil residue treatment oil to obtain deep vacuum residue;
the deep oxidation system is communicated with the vacuum distillation system and is used for receiving the deep vacuum residue output by the vacuum distillation system and carrying out deep oxidation on the deep vacuum residue to obtain target asphalt;
the reaction tower is provided with a first inlet for receiving the heated waste engine oil residues, a second inlet for receiving the blending agent, a third inlet for receiving the PH regulator and a treatment oil outlet for outputting the waste engine oil residues, and the first inlet and the second inlet are both arranged at the top of the reaction tower;
the reaction tower is internally provided with a stirring device, a baffle and a screen in sequence along the self axial direction, the stirring device is arranged close to the top of the reaction tower, the baffle is provided with an openable pore channel, the side wall of the reaction tower between the baffle and the screen is provided with an oversize residue outlet, and the third inlet is arranged on the side wall of the reaction tower between the screen and the bottom of the reaction tower;
wherein the deep oxidation system further comprises:
the tower plate is spirally arranged around the temperature control pipeline along the axial direction of the temperature control pipeline, the included angle between the plane of the ladder and the horizontal plane is 10 to 20 degrees, and a tongue-shaped opening is formed in the vertical plane of the ladder;
the PH regulator is one or the combination of two of aluminum hydroxide and sodium metaborate;
the admixtures are an ionic adsorbent and a solid waste adhesive.
2. The apparatus for asphaltating waste engine oil residue of claim 1, wherein the vacuum distillation system comprises:
the second heating furnace, the reduced pressure distillation tower and the light oil tank are communicated in sequence, and the second heating furnace is also communicated with the reaction tower.
3. The apparatus for asphaltating waste engine oil residue according to claim 1, wherein said deep oxidation system comprises:
the third heating furnace is communicated with the vacuum distillation system and is used for receiving and heating the deep vacuum residue output by the vacuum distillation system;
the deep oxidation tower is communicated with the third heating furnace and is used for receiving and deeply oxidizing the heated deep decompression slag output by the third heating furnace;
the air compression system is communicated with the deep oxidation tower so as to introduce air into the deep oxidation tower;
the temperature control pipeline is arranged in the deep oxidation tower, and the deep oxidation tower is provided with a temperature control circulation inlet and a temperature control circulation outlet which are communicated with the temperature control pipeline.
4. The apparatus for asphalting waste engine oil residue according to claim 1, further comprising:
and the tail gas recovery system is communicated with the reduced pressure distillation system, the deep oxidation system and the first heating furnace so as to recover tail gas generated by the reduced pressure distillation system and the deep oxidation system and convey the tail gas to the low-pressure heating furnace.
5. A method for asphalting waste engine oil residues using the apparatus for asphalting waste engine oil residues according to any of claims 1 to 4, characterized in that the method comprises the steps of:
mixing the waste engine oil residues with an additive, and mixing the mixed substance with a pH regulator to obtain waste engine oil residue treatment oil which has the pH value consistent with that of asphalt and does not contain corrosive ions;
mixing the waste engine oil residue treatment oil with atmospheric residue oil, and sequentially heating and distilling the mixed substances under reduced pressure to obtain deep vacuum residue oil;
and carrying out deep oxidation on the deep vacuum residue to obtain the target asphalt.
6. The method of asphalting waste engine oil residue according to claim 5,
the atmospheric residue oil is heavy oil obtained from the bottom of a distillation tower by distilling crude oil at normal pressure, and the mixing amount of the heavy oil is 10-40% of the residue of the waste engine oil;
the deep vacuum residue is the residue oil extracted from the mixture of waste engine oil residue and atmospheric residue at the bottom of the vacuum distillation tower.
7. A device for asphalting waste oil residues as defined in any of claims 1-4 for asphalting waste oil residues.
8. A method of asphalting waste oil residue as defined in any of claims 5-6 for asphalting waste oil residue.
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