CN109260755A - The separation method of highway waste asphalt pavement material - Google Patents
The separation method of highway waste asphalt pavement material Download PDFInfo
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- CN109260755A CN109260755A CN201811128624.6A CN201811128624A CN109260755A CN 109260755 A CN109260755 A CN 109260755A CN 201811128624 A CN201811128624 A CN 201811128624A CN 109260755 A CN109260755 A CN 109260755A
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- asphalt pavement
- waste asphalt
- extractor
- highway
- pavement material
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D11/00—Solvent extraction
- B01D11/02—Solvent extraction of solids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D11/00—Solvent extraction
- B01D11/02—Solvent extraction of solids
- B01D11/0288—Applications, solvents
-
- 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
- C10G1/00—Production of liquid hydrocarbon mixtures from oil-shale, oil-sand, or non-melting solid carbonaceous or similar materials, e.g. wood, coal
-
- 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
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Working-Up Tar And Pitch (AREA)
- Processing Of Solid Wastes (AREA)
- Extraction Or Liquid Replacement (AREA)
Abstract
The invention discloses a kind of separation methods of highway waste asphalt pavement material, belong to highway waste asphalt pavement material (RAP) separation technology field.This method first will be after highway waste asphalt pavement material disintegrating and drying, it is input to extractor, after complex solvent extraction is handled, coal tar and sand material are isolated, the coal tar that the miscella that coal tar and double solvents are formed obtains after distillation still is evaporated is pumped into asphalt oil tank.Become liquid circulation use after the double solvents gas condensation evaporated.Surplus material is heated to 90-130 DEG C in extractor, and control vacuum degree is 1.5-3KPa, after the remaining double solvents in sand material is changed into gaseous state output, then sand material is exported.Highway waste asphalt pavement material (RAP) is handled by specific double solvents and technological parameter in the separation process, the recovery rate of coal tar is 94% or more, and pitch residual is less in separated sand material out.
Description
Technical field
The present invention relates to highway waste asphalt pavement material separation technology fields, and in particular to a kind of highway waste asphalt road
The separation method of plane materiel material.
Background technique
Highway waste asphalt pavement material (RAP) is the waste asphalt road generated when milling is dug in highway revision
Plane materiel material, wherein bitumen content 4-5%, building stones (coarse aggregate, fine aggregate, miberal powder) account for 95-96%.
477.35 ten thousand kilometers of highway in China mileage, 3.4 hundred million tons of unmade way highway waste asphalt pavement materials are generated every year
Expect (RAP).2020 are pointed out in Department of Transportation's " about instruction for accelerating that highway pavement closed matereial cycle is promoted to work "
The waste and old road surface material material of year whole nation realization " zero is discarded ".
Currently, the hot and cold regeneration treatment technology of waste asphalt materials'use, the application of four seven kinds of class technologies are generally deposited both at home and abroad
: new 50% or more building stones additive amount, and the requirement of high-grade highway mixture is not achieved, and it is used as bed course, it is covert to waste, it gives up
Old highway asphalt material does not obtain rationally effectively recycling.
With carrying out for Green Development policy, building stones resource, asphalt price is constantly soaring, China's oilstone isolation technics
There is new development, R & D Enterprises are continuously increased, but also fail to the requirement for reaching industrialized production, do not reach constitutional law law
Rule.Stabilization of equipment performance is poor, and production technology bottleneck problem does not solve, and lacks reliable running technology data and technological parameter, no
The serialization industrialized production that highway is overhauled can be applied to.It is the most key, during the cost accounting of production, no data
Support, can not quantify and embody the economic benefit of project, social benefit is not known where to begin more, therefore more difficult popularization and application.
Summary of the invention
For the shortcomings of the prior art, the purpose of the present invention is to provide a kind of highway waste asphalt pavements
The separation method of material (RAP) industrialized production, this method solve highway waste asphalt pavement materials (RAP) to extract industry life
Bottleneck problem during productionization, by specific double solvents and technological parameter to highway waste asphalt pavement in separation process
Material (RAP) is handled, and the recovery rate of coal tar is 95% or more, and in separated sand material out, pitch remains 0.2-
0.3%, reach " standard specification for construction and acceptance of highway asphalt pavement " (JTG-F40-2004) requirement.
To achieve the above object, the technical solution adopted in the present invention is as follows:
A kind of separation method of highway waste asphalt pavement material, includes the following steps:
(1) highway waste asphalt pavement material is transported in extractor after crushing and drying；
(2) highway waste asphalt pavement material carries out extraction processing, coal tar and sandstone through the double solvents in extractor
Material separation；The composition of the double solvents are as follows: petroleum ether 24.2-26wt.%, normal heptane 14.5-16wt.%, No. 120 solvent naphthas
For surplus.
(3) highway waste asphalt pavement material obtains mixed material, coal tar therein after complex solvent extraction is handled
The miscella formed with double solvents is pumped into filter by mixing oil pump, is pumped into distillation still again after removing impurity, after distilling
Isolate coal tar and double solvents；Double solvents remaining in extractor and sand material are heated to 90-130 DEG C, and controlled
Under conditions of vacuum degree is 1.5-3KPa, the double solvents in extractor is changed into gaseous state and exports, and finally carries out sand material
Output.
In above-mentioned steps (1), waste asphalt material is transported to the detailed process in extractor are as follows: raw material is conveyed through conveyer
To pulverizer, being crushed to partial size is 50mm particle below；It is transported to drying in drying machine through conveyer again, at 50-65 DEG C
Under the conditions of after drying and dehydrating, extractor is transported to by conveyer.
In above-mentioned steps (2), the temperature of the extraction processing is 50-65 DEG C, and the time is 50-120 minutes, and extraction processing exists
It is carried out under stirring condition.
In above-mentioned steps (2), the usage amount of double solvents is the 0.50- of highway waste asphalt pavement material weight
0.70wt.%.
In above-mentioned steps (2), the extractor includes closed container, blender and heating layer；The heating layer is arranged in
The side and bottom surface of closed container are passed through steam or conduction oil in heating layer, by steam or conduction oil to the object in extractor
Material is heated；Blender is set in closed container and is stirred to the mixed material in extractor；The top of the closed container
End is equipped with vacuum pump interface, gas vent and colvent inlet；Vacuum pump interface is for connecting vacuum pump, to control in extractor
Vacuum degree, vacuum pump connect condenser simultaneously；Gas vent and colvent inlet are respectively used to output and the liquid of double solvents gas
The input of state double solvents；The bottom of closed container is equipped with sand material and exports and mix oil export.
The double solvents is placed in solvent circulating tank, by solvent pump after extracting out in solvent circulating tank, is entered via solvent
Mouthful enter extractor in, highway waste asphalt pavement material in extractor is extracted, the coal tar isolated with it is compound molten
Dosage form at miscella, be input in distillation still after cleaning, after being heated to 90-130 DEG C in distillation still, double solvents becomes
Gaseous state, and be condensed into liquid through condenser, into solvent circulating tank in be recycled, remaining coal tar is input in distillation still
Asphalt oil tank；It after remaining double solvents is transformed into gaseous state in extractor, is exported through gas vent, and enters condensation through vacuum pump
After device, become in liquids recovery to solvent circulating tank.
In above-mentioned steps (3), the highway waste asphalt pavement material in extractor is after complex solvent extraction is handled, to mixed
After double solvents gas output after closing oil and heating, remaining sand material is input in sand classifying machine through conveyer, by grain
Diameter output sand material of different sizes and building stones, for making again in highway or comprehensive utilization.In separated sand material out, pitch
Oil residual 0.2-0.3%.
After highway waste asphalt pavement material this method separation and Extraction, the recovery rate of coal tar is 94% or more.
It design principle of the present invention and has the beneficial effect that:
1, the present invention is that highway waste asphalt pavement material (RAP) continuously separates production technology, is used for highway waste asphalt
The separation of ground surface material (RAP), the coal tar isolated is modified to reach " standard specification for construction and acceptance of highway asphalt pavement " (JTG-
F40-2004 it) requires；Building stones (sand, building stones miberal powder) " the standard specification for construction and acceptance of highway asphalt pavement " (JTG-F40- isolated
2004) it requires.Waste material becomes virgin material, can be used repeatedly, make China's building stones resources sustainable development.
It solves the problems, such as largely to add new building stones in highway revision, realizes Green Development.
2, by the present invention in that with specific composition and the double solvents of content, in strict control extraction temperature and operating time
In the case where, realize the extraction and separation of the coal tar and sand material of highway waste asphalt pavement material (RAP).And further pass through
The structure design of extractor, in extractor temperature and vacuum degree etc. control, realize in extractor double solvents in mixed material,
The output respectively of miscella and sand material.
3, the continuous separation production technology of highway waste asphalt pavement material (RAP) of the present invention has producing cost low, no
By seasonal effect, whole year production 300 days or more.
4, highway waste asphalt pavement material (RAP) of the present invention continuously separation production technology in, bitumen extraction rate 94% with
Above (bituminous oil 4-5% calculating), in sand material within pitch residual 0.2-0.3%.
5, highway waste asphalt pavement material (RAP) of the present invention continuously separates production technology, no exhaust gas, waste water and waste residue row
It puts.
6, highway waste asphalt pavement material (RAP) of the present invention continuously separates production technology, and the construction period is short, and eight months i.e.
It can put into production.
Detailed description of the invention
Fig. 1 is extractor structural schematic diagram used in the present invention.
Fig. 2 is separation method flow diagram of the present invention.
Specific embodiment
For a further understanding of the present invention, present invention is described with reference to embodiments, but embodiment is only to this
The characteristics of invention and advantage are further elaborated, rather than limiting to the claimed invention.Present invention process parameter is in
Obtain there is very strong operability and feasibility after examination equipment experiment.
The present invention is highway waste asphalt pavement material (RAP) separation method, and the structure of extractor used is such as in this method
Shown in Fig. 1.The extractor includes closed container, blender and heating layer；The heating layer be arranged in closed container side and
Bottom surface is passed through steam or conduction oil in heating layer, by adding steam or conduction oil to heat the material in extractor；Stirring
Device is set in closed container and is stirred to the mixed material in extractor；The top of the closed container connects equipped with vacuum pump
Mouth, gas vent and colvent inlet；Vacuum pump interface is for connecting vacuum pump, to control the vacuum degree in extractor, vacuum pump
Condenser is connected simultaneously；Gas vent and colvent inlet be respectively used to double solvents gas output and liquid double solvents it is defeated
Enter；The bottom of closed container is exported equipped with sand material, and closed container lower part is additionally provided with mixing oil export.
Embodiment 1:
The present embodiment highway waste asphalt pavement material (RAP) separation method, process such as Fig. 2 specifically comprise the following steps:
(1) highway waste asphalt pavement material (RAP) includes coal tar, sand material, pitch oil content 4-5%；Raw material warp
Conveyer is transported to pulverizer, and being crushed to partial size is 50mm particle below；It is transported to drying in drying machine through conveyer again,
Drying and dehydrating under the conditions of 50-65 DEG C is transported to extractor by conveyer.
(2) highway waste asphalt pavement material (RAP) carries out extraction processing through the double solvents in extractor, described compound
Solvent is placed in solvent circulating tank, by solvent pump after extracting out in solvent circulating tank, is entered in extractor via colvent inlet；It is multiple
The usage amount of bonding solvent is the 0.5wt.% of the weight of raw material.The temperature of extraction processing is 60 DEG C, and extraction time is 120 minutes,
Extraction processing carries out under agitation.The composition of the double solvents are as follows: No. 120 solvent naphtha 60wt.%, petroleum ether
25.5wt.%, normal heptane 14.5wt.%.
(3) highway waste asphalt pavement material (RAP) is after complex solvent extraction is handled, what pitch and double solvents were formed
Miscella is pumped into filter by mixing oil pump, is pumped into distillation still again after removing impurity, double solvents becomes gaseous state after evaporating
It is output in condenser, becomes liquid and enter in solvent circulating tank to be recycled.The coal tar isolated enters asphalt oil tank.It is public
After road waste asphalt pavement material (RAP) uses this method separation and Extraction, the recovery rate of pitch is 95%.
After miscella output in extractor, containing the sand material of double solvents, it will be heated to 90-130 DEG C in extractor,
Control vacuum degree is 1.5-3KPa, and double solvents is changed into gaseous state output, enters in condenser via vacuum pump, be cooled to liquid
After be input in solvent circulating tank and be recycled.Finally sand material is input in sand classifying machine through conveyer, it is big by partial size
Small output sand material and building stones.Pitch residual 0.2% in separated sand material out.
Embodiment 2:
Difference from Example 1 is:
The composition of the double solvents are as follows: No. 120 solvent naphtha 60wt.%, petroleum ether 24.5wt.%, normal heptane
15.5wt.%.
By 1 operating procedure of example, highway waste asphalt pavement material (RAP) raw material is after separation and Extraction, the extraction of pitch
Rate is 94.2% or more.
In separated sand material out, pitch residual 0.25%.
Comparative example 1:
Difference from Example 1 is:
The composition of the double solvents are as follows: No. 120 solvent naphtha 60wt.%, petroleum ether 20wt.%, normal heptane 20wt.%.
For highway waste asphalt pavement material (RAP) raw material after separation and Extraction, the recovery rate of pitch is 80.1%.
In separated sand material out, pitch residual 0.84%.
Comparative example 2:
Difference from Example 1 is:
The composition of the double solvents are as follows: hexane 60wt.%, petroleum ether 25wt.%, normal heptane 15wt.%.
For highway waste asphalt pavement material (RAP) raw material after separation and Extraction, the recovery rate of pitch is 70.41%.
In separated sand material out, pitch residual 1.25%.
Claims (9)
1. a kind of separation method of highway waste asphalt pavement material, it is characterised in that: this method comprises the following steps:
(1) highway waste asphalt pavement material is transported in extractor after crushing and drying；
(2) highway waste asphalt pavement material carries out extraction processing, coal tar and sand material point through the double solvents in extractor
From；The composition of the double solvents are as follows: petroleum ether 24.2-26wt.%, normal heptane 14.5-16wt.%, No. 120 solvent naphthas are remaining
Amount.
(3) highway waste asphalt pavement material obtains mixed material after complex solvent extraction is handled, coal tar therein and multiple
The miscella that bonding solvent is formed is pumped into filter by mixing oil pump, is pumped into distillation still after removing impurity, separates again after distilling
Coal tar and double solvents out；Double solvents remaining in extractor and sand material are heated to 90-130 DEG C, and control vacuum
Under conditions of degree is 1.5-3KPa, the double solvents in extractor is changed into gaseous state and exports, and finally exports sand material.
2. the separation method of highway waste asphalt pavement material according to claim 1, it is characterised in that: in step (1),
Waste asphalt material is transported to the detailed process in extractor are as follows: raw material is transported to pulverizer through conveyer, is crushed to partial size and is
50mm particle below；It is transported to drying in drying machine through conveyer again, under conditions of 50-65 DEG C after drying and dehydrating, by defeated
Machine is sent to be transported to extractor.
3. the separation method of highway waste asphalt pavement material according to claim 1, it is characterised in that: in step (2),
The temperature of the extraction processing is 50-65 DEG C, and the time is 50-120 minutes, and extraction processing carries out under agitation.
4. the separation method of highway waste asphalt pavement material according to claim 1 or 3, it is characterised in that: step (2)
In, the usage amount of double solvents is the 0.50-0.70wt.% of highway waste asphalt pavement material weight.
5. the separation method of highway waste asphalt pavement material according to claim 1, it is characterised in that: in step (2),
The extractor includes closed container, blender and heating layer；The heating layer is arranged in the side and bottom surface of closed container, adds
It is passed through steam or conduction oil in thermosphere, the material in extractor is heated by steam or conduction oil；Blender is set to close
It closes in container and the mixed material in extractor is stirred；The top of the closed container is equipped with vacuum pump interface, gas goes out
Mouth and colvent inlet；Vacuum pump interface is for connecting vacuum pump, and to control the vacuum degree in extractor, vacuum pump connects cold simultaneously
Condenser；Gas vent and colvent inlet are respectively used to the output of double solvents gas and the input of liquid double solvents；Closed appearance
The bottom of device is equipped with sand material and exports and mix oil export.
6. the separation method of highway waste asphalt pavement material according to claim 5, it is characterised in that: described compound molten
Agent is placed in solvent circulating tank, by solvent pump after extracting out in solvent circulating tank, is entered in extractor via colvent inlet, to extraction
Qu Qinei highway waste asphalt pavement material is extracted, the miscella that the coal tar isolated and double solvents are formed, through removing
It is input in distillation still after miscellaneous, after being heated to 90-130 DEG C in distillation still, double solvents becomes gaseous state, and condenses through condenser
At liquid, into solvent circulating tank in be recycled, remaining coal tar is input to asphalt oil tank in distillation still；It is residual in extractor
It after the double solvents stayed is transformed into gaseous state, is exported through gas vent, and after vacuum pump enters condenser, becomes liquids recovery and arrive
In solvent circulating tank.
7. the separation method of highway waste asphalt pavement material according to claim 5, it is characterised in that: in step (3),
Double solvents of the highway waste asphalt pavement material in extractor after complex solvent extraction is handled, after oil to be mixed and heating
After gas output, remaining sand material is input in sand classifying machine through conveyer, exports sand material and stone by particle size difference
Material, for making again in highway or comprehensive utilization.
8. the separation method of highway waste asphalt pavement material according to claim 7, it is characterised in that: it is separated go out
In sand material, coal tar remains 0.2-0.3%.
9. the separation method of highway waste asphalt pavement material according to claim 1, it is characterised in that: the highway is useless
After old bitumen pavement material this method separation and Extraction, the recovery rate of coal tar is 94% or more.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811128624.6A CN109260755B (en) | 2018-09-27 | 2018-09-27 | Method for separating waste asphalt pavement materials of highway |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811128624.6A CN109260755B (en) | 2018-09-27 | 2018-09-27 | Method for separating waste asphalt pavement materials of highway |
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| CN109260755B CN109260755B (en) | 2021-01-29 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112048966A (en) * | 2020-08-27 | 2020-12-08 | 江苏现代路桥有限责任公司 | Device and method for recovering asphalt in waste asphalt pavement material |
| CN112755578A (en) * | 2020-12-22 | 2021-05-07 | 同济大学 | Asphalt cement separation method based on supercritical fluid extraction |
| CN115108760A (en) * | 2022-04-24 | 2022-09-27 | 南京快联路桥建设工程有限公司 | Production process of asphalt based on thermal regeneration of old asphalt pavement materials |
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| CN105368476A (en) * | 2015-11-16 | 2016-03-02 | 江苏云端重工科技有限公司 | Asphalt extraction technological process by mineral asphalt solvent |
| CN105733643A (en) * | 2016-03-26 | 2016-07-06 | 辽宁大学 | Method for extracting oil sand bitumen by using organic solvent |
| CN105861041A (en) * | 2016-05-09 | 2016-08-17 | 辽宁石油化工大学 | Method for removing sediment in tar sand oil |
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| FR1165876A (en) * | 1956-05-31 | 1958-10-30 | Licencia Talalmanyokat | Process for the production of lubricating oils with high viscosity indices using solid adsorbents |
| CN105368476A (en) * | 2015-11-16 | 2016-03-02 | 江苏云端重工科技有限公司 | Asphalt extraction technological process by mineral asphalt solvent |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112048966A (en) * | 2020-08-27 | 2020-12-08 | 江苏现代路桥有限责任公司 | Device and method for recovering asphalt in waste asphalt pavement material |
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| CN115108760A (en) * | 2022-04-24 | 2022-09-27 | 南京快联路桥建设工程有限公司 | Production process of asphalt based on thermal regeneration of old asphalt pavement materials |
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| CN109260755B (en) | 2021-01-29 |
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