CN105176559B - The device and method of Bituminous concrete surface in a kind of quick recycling waste asphalt pavement material - Google Patents
The device and method of Bituminous concrete surface in a kind of quick recycling waste asphalt pavement material Download PDFInfo
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- CN105176559B CN105176559B CN201510633508.XA CN201510633508A CN105176559B CN 105176559 B CN105176559 B CN 105176559B CN 201510633508 A CN201510633508 A CN 201510633508A CN 105176559 B CN105176559 B CN 105176559B
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Abstract
The present invention relates to a kind of device and methods of Bituminous concrete surface in quick recycling waste asphalt pavement material, are used for Rapid extraction waste asphalt pavement material pitch, contribute to Accurate Determining recycling asphaltic nature to refer to calibration method, belong to pavement material engineering field.The present invention compares to propose by research utilizes negative pressure of vacuum technology; filtering and Distallation systm are based on an enclosed system; fast filtering and distillation; reduce vapo(u)rizing temperature; CO2 reduces bitumen blowing as negative pressure of vacuum protection gas and tests the new method of this quick recycling Bituminous concrete surface of danger coefficient; effectively solving the pitch after recycling, there are impurity and trichloroethylene solvent this technical problems; asphaltic nature index is recycled so as to Accurate Determining, is laid the foundation for follow-up more scientific and reasonable cycling and reutilization waste asphalt pavement material.
Description
Technical field：
The invention belongs to pavement material engineering fields, and in particular to a kind of quickly to recycle old drip in waste asphalt pavement material
Green device and method.
Background technology：
Currently, with the continuous development of highway in China construction, major highway subsequently enters repair, extends, overhauls rank
Section, will generate a large amount of waste asphalt mixture in the process, and therefore, recycling and the utilization of waste asphalt pavement material have
Great practical significance.
In maintenance period, a large amount of waste asphalt mixture will be generated, the energy crisis in face of China and waste and old drip
The degree of aging of green mixture will directly affect the adding proportion present situation of the selection and regenerative agent of Applied of Asphalt Pavement Recycle Technique, evaluation
Former pavement asphalt degree of aging is the basis of Regenerative Technique of Asphalt Mixture.The accurate of degree of aging of former pavement asphalt is commented
Valence, at present China《Highway engineering pitch and Asphalt Mixture Experiment regulation》There are two types of bitumen recoveries for regulation in JTG E20-2011
Method：Abson method and rotary evaporation.Shown according to the test result of this two kinds of recovery methods, the pitch after recycling there is also
A small amount of impurity and trichloroethylene solvent, will have a direct impact on the evaluation index of ageing of asphalt degree in this way.
Therefore, the present invention, which is compared for these problems by research, proposes new method, contributes to after solving to recycle
There is also a small amount of impurity and trichloroethylene solvent this technical problems for pitch.
Invention content：
It is an object of the invention to can Rapid extraction waste asphalt pavement material pitch, contribute to Accurate Determining recycling drip
Green property refers to calibration method, the operation of specification laboratory test.
The device of Bituminous concrete surface in a kind of quick recycling waste asphalt pavement material, including dissolution kettle, filter, vacuum system
System, Distallation systm, solvent receive system and pitch receiving tank；The vacuum system includes vacuum receiving tank and vacuum pump；It is described
Distallation systm includes distillation still, condenser pipe, stirring motor and blender, and the blender is located at outside distillation still, and blender is located at
It is connected in distillation still and with blender；It includes solvent receiving tank and solvent barrel that the solvent, which receives system, the solvent barrel with it is molten
Agent receiving tank is connected；The dissolution kettle is connected with filter, and filter is connected by vacuum receiving tank with distillation still upper end, distillation
Kettle lower end is connected with pitch receiving tank, and described vacuum pump one end other end that is connected with vacuum receiving tank is connected with solvent receiving tank,
Described condenser pipe one end other end that is connected with distillation still is connected with solvent receiving tank.
It is provided with oil bath heating chuck outside the distillation still.
The vacuum receives and is provided with atmospheric air port in pump, pitch receiving tank and solvent receiving tank.
It is provided with filter cloth in the filter.
The method of Bituminous concrete surface, includes the following steps in a kind of quick recycling waste asphalt pavement material：
Step 1：Waste asphalt mixture is taken, 30min is heated in 100 DEG C of ± 5 DEG C of baking ovens after drying up moisture with hair-dryer
Make it loose above；Mixture is impregnated with trichloro ethylene no less than for 24 hours, pitch is made fully to dissolve, and dissolved dilution ratio is pitch
And the ratio of trichloro ethylene is 1:10；
Step 2：Natural gravity sedimentation is carried out, until bulk impurity sedimentation is complete；Centrifugal sedimentation is carried out again, until solution is clear
Clearly；The centrifugal sedimentation requires centrifuge speed to be not less than 3000r/min, and centrifugal force is no less than 770G（Acceleration of gravity）；
Step 3：Pitch trichloro ethylene solution after sedimentation is placed in dissolution kettle, filter is entered back into, utilizes vacuum pump
Quickly pitch trichloro ethylene solution is filtered by vacuum by filter cloth for vacuum principle；
Step 4：Filtered solution enters in closed container vacuum distillation system, and solution reaches under the pressure of 20kpa
30 DEG C ~ 40 DEG C of temperature, distills out trichloroethylene solvent, and the solvent that enters for distilling out trichloroethylene solvent receives system recycling again
It utilizes, the pitch obtained after distillation enters pitch receiving tank.If the asphalt surface disturbance after recycling is larger, make asphalt surface not
It is smooth, smooth, pitch can be placed in 100 DEG C of thermostatic drying chambers and heat 5 ~ 10min（This process uses CO2 as protection gas）.
The filtering and distillation process all carry out under the conditions of relative vacuum, and CO2 protects gas as relative vacuum.
When carrying out natural gravity sedimentation and centrifugal sedimentation processing to pitch trichloro ethylene solution, it is desirable that centrifuge speed is not
Less than 3000r/min, centrifugal force is no less than 770G（Acceleration of gravity）, the solution after such settlement treatment, after being
Continuous vacuum filter is got ready.
Solution after sedimentation is placed in the entire vacuum system of filtering and distillation.Utilize vacuum principle, filtration system energy
Solution is filtered by filter cloth quickly, filter efficiency can be improved, largely reduces impurity leakage filter, solvent distillation
Purity improves, and last gained pitch is impure and solvent is reduced, and whole waste asphalt extracting speed is greatly improved；When distillation
It is to be carried out under the conditions of relative vacuum, solution boiling point reduces under negative pressure, greatly reduces the danger coefficient of experiment., vacuum pressure exists
20kpa, CO2 protect gas, temperature to reach 30 DEG C ~ 40 DEG C of temperature as relative vacuum, you can solvent trichlorethylene is quickly steamed,
The aerobic environment of high temperature is reduced, the danger coefficient of experiment and construction is reduced, distillation speed is very fast, reduces the volatilization time of pitch,
Keep the solvent purity steamed higher, recyclable recycling.
Because filtering and distillation whole system are at and carry out under the conditions of relative vacuum, CO2 is as relative vacuum protection
Gas, contact when improving pitch and heating with air reduce oxidation of the pitch in extractive process, measure asphaltic nature index
More accurate, high efficiente callback utilizes, and good basis is laid for subsequent regeneration techniques.
Compared with prior art, advantageous effect possessed by the present invention is：It being capable of Rapid extraction waste asphalt pavement material
Pitch reduces the danger coefficient of experiment and construction, and measurement asphaltic nature index is more accurate, and profit is recycled to pitch and solvent high-efficiency
With laying good basis for subsequent regeneration techniques.
Description of the drawings
Fig. 1：The method flow diagram of Bituminous concrete surface in a kind of quick recycling waste asphalt pavement material；
Fig. 2：The installation drawing of Bituminous concrete surface in a kind of quick recycling waste asphalt pavement material；
Label：1, No.1 valve, 2, No. two valves, 3, No. three valves, 4, No. four valves, 5, No. five valves, 6, No. six valves
Door, 7, No. seven valves, 8, No. eight valves, 9, No. nine valves, 10, No. ten valves, 11, dissolution kettle, 12, filter, 13, vacuum connects
Closed cans, 14, vacuum pump, 15, distillation still, 16, stirring motor, 17, blender, 18, pitch receiving tank, 19, solvent receiving tank,
20, solvent barrel, 21, condenser pipe, 22, No.1 atmospheric air port, 23, No. two atmospheric air ports, 24, No. three atmospheric air ports, 25, oil bath heating folder
Set.
Specific implementation mode
The device of Bituminous concrete surface in a kind of quick recycling waste asphalt pavement material, including dissolution kettle 11, filter 12, vacuum
System, Distallation systm, solvent receive system and pitch receiving tank 18；The vacuum system includes vacuum receiving tank 13 and vacuum pump
14；The Distallation systm includes distillation still 15, condenser pipe 21, stirring motor 16 and blender 17, and the blender 16, which is located at, to be steamed
It evaporates outside kettle 15, blender 17 is located in distillation still 15 and is connected with blender 16；It includes that solvent receives that the solvent, which receives system,
Tank 19 and solvent barrel 20, the solvent barrel 20 are connected with solvent receiving tank 19；The dissolution kettle 11 is connected with filter 12, filtering
Device 12 is connected by vacuum receiving tank 13 with 15 upper end of distillation still, and 15 lower end of distillation still is connected with pitch receiving tank 18, described true
14 one end of sky pump other end that is connected with vacuum receiving tank 13 is connected with solvent receiving tank 19,21 one end of the condenser pipe and distillation still
The 15 connected other ends are connected with solvent receiving tank 19.
It is provided with oil bath heating chuck 25 outside the distillation still 15.
Be correspondingly arranged in the vacuum receiving tank 13, pitch receiving tank 18 and solvent receiving tank 19 No.1 atmospheric air port 22,
No. two atmospheric air ports 23 and No. three atmospheric air ports 24.
It is provided with filter cloth in the filter 12.
A kind of method of quick carry out waste asphalt pavement material recovery Bituminous concrete surface, it is specific as follows：
Embodiment one：
Step 1：Waste asphalt mixture is taken, makes its pine with 30min is heated in 100 DEG C of baking ovens after hair-dryer drying moisture
It dissipates, impregnates mixture for 24 hours with trichloro ethylene, pitch is made fully to dissolve, dissolved dilution ratio is that the ratio of pitch and trichloro ethylene is
1:10；
Step 2：Natural gravity sedimentation is carried out, until bulk impurity sedimentation is complete；Centrifugal sedimentation is carried out again, until solution is clear
Clearly；Centrifuge speed is in 3000r/min, and centrifugal force is in 770G（Acceleration of gravity）；
Step 3：All valves are opened, protection gas CO2 is passed through, after full of after whole system, close all valves.It opens again
Solution is poured into dissolution kettle 11 by No.1 valve 1, opens No. three valves 3 and No. four valves 4, opens vacuum pump 14, then open No. two
Valve 2, quickly by filter 12, filtering finishes solution；
Step 4：No. three valves 3 and No. four valves 4 are closed, the No.1 valve 7, eight of atmospheric air port 22, seven 8 and of valve is opened
No. nine valves 9 open vacuum pump 14 and control Distallation systm tank pressure 20kpa, close No. seven valves 7, condensation is passed through in condenser pipe 21
Liquid, then No. five valves 5 and No. six valves 6 are opened, filtered solution can smoothly enter into distillation still 15.No. six valves 6 are closed, are opened
Stirring motor 16, to 30 DEG C, trichloroethylene solvent starts to steam oil bath heating；When pipe 21 to be condensed is inner not to have liquid condensation, close
8, No. nine valves 9 of No. eight valves and vacuum pump 14 are closed, No. seven valves 7 are opened, the pitch after distillation can smoothly enter into pitch receiving tank
In 18, stirring motor 16 is closed.It opens No. two atmospheric air ports 23 and No. ten valves 10, the trichloroethylene solvent after recycling passes through solvent
Receiving tank 19 is weighed into solvent barrel 20；No. three atmospheric air ports 24 are opened, normal pressure is restored, after pitch is cooled to room temperature, pitch returns
It harvests complete.In filtering and distillation process, restore normal pressure, when decompression and pressurize is all to use CO2 as protecting gas.
Embodiment two：
Step 1：Waste asphalt mixture is taken, makes its pine with 50min is heated in 95 DEG C of baking ovens after hair-dryer drying moisture
It dissipates, impregnates mixture for 24 hours with trichloro ethylene, pitch is made fully to dissolve, dissolved dilution ratio is that the ratio of pitch and trichloro ethylene is
1:10；
Step 2：Natural gravity sedimentation is carried out, until bulk impurity sedimentation is complete；Centrifugal sedimentation is carried out again, until solution is clear
Clearly；Centrifuge speed is in 3000r/min, and centrifugal force is in 770G（Acceleration of gravity）；
Step 3：All valves are opened, protection gas CO2 is passed through, after full of after whole system, close all valves.It opens again
Solution is poured into dissolution kettle 11 by No.1 valve 1, opens No. three valves 3 and No. four valves 4, opens vacuum pump 14, then open No. two
Valve 2, quickly by filter 12, filtering finishes solution；
Step 4：No. three valves 3 and No. four valves 4 are closed, the No.1 valve 7, eight of atmospheric air port 22, seven 8 and of valve is opened
No. nine valves 9 open vacuum pump 14 and control Distallation systm tank pressure 20kpa, close No. seven valves 7, condensation is passed through in condenser pipe 21
Liquid, then No. five valves 5 and No. six valves 6 are opened, filtered solution can smoothly enter into distillation still 15.No. six valves 6 are closed, are opened
Stirring motor 16, to 35 DEG C, trichloroethylene solvent starts to steam oil bath heating；When pipe 21 to be condensed is inner not to have liquid condensation, close
8, No. nine valves 9 of No. eight valves and vacuum pump 14 are closed, No. seven valves 7 are opened, the pitch after distillation can smoothly enter into pitch receiving tank
In 18, stirring motor 16 is closed.It opens No. two atmospheric air ports 23 and No. ten valves 10, the trichloroethylene solvent after recycling passes through solvent
Receiving tank 19 is weighed into solvent barrel 20；No. three atmospheric air ports 24 are opened, normal pressure is restored, after pitch is cooled to room temperature, pitch returns
It harvests complete.In filtering and distillation process, restore normal pressure, when decompression and pressurize is all to use CO2 as protecting gas.
Embodiment three：
Step 1：Waste asphalt mixture is taken, makes its pine with 60min is heated in 105 DEG C of baking ovens after hair-dryer drying moisture
It dissipates, impregnates mixture for 24 hours with trichloro ethylene, pitch is made fully to dissolve, dissolved dilution ratio is that the ratio of pitch and trichloro ethylene is
1:10；
Step 2：Natural gravity sedimentation is carried out, until bulk impurity sedimentation is complete；Centrifugal sedimentation is carried out again, until solution is clear
Clearly；Centrifuge speed is in 3000r/min, and centrifugal force is in 770G（Acceleration of gravity）；
Step 3：All valves are opened, protection gas CO2 is passed through, after full of after whole system, close all valves.It opens again
Solution is poured into dissolution kettle 11 by No.1 valve 1, opens No. three valves 3 and No. four valves 4, opens vacuum pump 14, then open No. two
Valve 2, quickly by filter 12, filtering finishes solution；
Step 4：No. three valves 3 and No. four valves 4 are closed, the No.1 valve 7, eight of atmospheric air port 22, seven 8 and of valve is opened
No. nine valves 9 open vacuum pump 14 and control Distallation systm tank pressure 20kpa, close No. seven valves 7, condensation is passed through in condenser pipe 21
Liquid, then No. five valves 5 and No. six valves 6 are opened, filtered solution can smoothly enter into distillation still 15.No. six valves 6 are closed, are opened
Stirring motor 16, to 40 DEG C, trichloroethylene solvent starts to steam oil bath heating；When pipe 21 to be condensed is inner not to have liquid condensation, close
8, No. nine valves 9 of No. eight valves and vacuum pump 14 are closed, No. seven valves 7 are opened, the pitch after distillation can smoothly enter into pitch receiving tank
In 18, stirring motor 16 is closed.It opens No. two atmospheric air ports 23 and No. ten valves 10, the trichloroethylene solvent after recycling passes through solvent
Receiving tank 19 is weighed into solvent barrel 20；No. three atmospheric air ports 24 are opened, normal pressure is restored, after pitch is cooled to room temperature, pitch returns
It harvests complete..Asphalt surface disturbance after recycling is larger, keeps asphalt surface rough, smooth, pitch, which is placed in 100 DEG C of constant temperature, to be done
Dry case heats 10min（This process uses CO2 as protection gas）.In filtering and distillation process, restore normal pressure, decompression and guarantor
All it is to use CO2 as protection gas when pressure.
Claims (6)
1. a kind of method of Bituminous concrete surface in quick recycling waste asphalt pavement material, it is characterised in that quickly recycling waste asphalt road
The device of Bituminous concrete surface includes dissolution kettle in plane materiel material, filter, vacuum system, Distallation systm, solvent receives system and pitch connects
Closed cans；The vacuum system includes vacuum receiving tank and vacuum pump；The Distallation systm includes distillation still, condenser pipe, stirring electricity
Machine and blender, the blender are located at outside distillation still, and blender is located in distillation still and is connected with blender；The solvent connects
Receipts system includes solvent receiving tank and solvent barrel, and the solvent barrel is connected with solvent receiving tank；The dissolution kettle and filter phase
Even, filter is connected by vacuum receiving tank with distillation still upper end, filter cloth is provided in filter, distillation still lower end connects with pitch
Closed cans is connected, and described vacuum pump one end other end that is connected with vacuum receiving tank is connected with solvent receiving tank, described condenser pipe one end
The other end that is connected with distillation still is connected with solvent receiving tank;Include the following steps：
Step 1：Waste asphalt mixture is taken, 30min or more is heated in 100 DEG C of ± 5 DEG C of baking ovens after drying up moisture with hair-dryer
Keep it loose；Mixture is impregnated with trichloro ethylene no less than for 24 hours, pitch is made fully to dissolve, and dissolved dilution ratio is pitch and three
The ratio of vinyl chloride is 1:10；
Step 2：Natural gravity sedimentation is carried out, until bulk impurity sedimentation is complete；Centrifugal sedimentation is carried out again, until solution is clarified；
Step 3：Pitch trichloro ethylene solution after sedimentation is placed in dissolution kettle, filter is entered back into, utilizes vacuum pump vacuum
Quickly pitch trichloro ethylene solution is filtered by vacuum by filter cloth for principle；
Step 4：Filtered solution enters in closed container vacuum distillation system, under the pressure of 20kpa solution reach 30 DEG C ~
40 DEG C of temperature, distills out trichloroethylene solvent, and the solvent that enters for distilling out trichloroethylene solvent receives system recycling,
The pitch obtained after distillation enters pitch receiving tank.
2. the method for Bituminous concrete surface, feature exist in a kind of quick recycling waste asphalt pavement material according to claim 1
In the distillation still is provided with oil bath heating chuck outside.
3. the method for Bituminous concrete surface, feature exist in a kind of quick recycling waste asphalt pavement material according to claim 1
In being provided with atmospheric air port in the vacuum receiving tank, pitch receiving tank and solvent receiving tank.
4. the method for Bituminous concrete surface, feature exist in a kind of quick recycling waste asphalt pavement material according to claim 1
In the centrifugal sedimentation requires centrifuge speed to be not less than 3000r/min, and centrifugal force is no less than 770G（Acceleration of gravity）.
5. the method for Bituminous concrete surface, feature exist in a kind of quick recycling waste asphalt pavement material according to claim 1
In the filtering and distillation process all carry out under the conditions of relative vacuum, and CO2 protects gas as relative vacuum.
6. the method for Bituminous concrete surface, feature exist in a kind of quick recycling waste asphalt pavement material according to claim 1
In, the dissolution kettle, filter, vacuum receiving tank, distillation still, pitch receiving tank and solvent receiving tank be both provided with inlet valve and
Outlet valve ensures each process independent operating, does not interfere with each other.
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| CN201510633508.XA CN105176559B (en) | 2015-09-30 | 2015-09-30 | The device and method of Bituminous concrete surface in a kind of quick recycling waste asphalt pavement material |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109212172A (en) * | 2017-07-05 | 2019-01-15 | 吉林省嘉鹏集团有限公司 | Reclaimed asphalt mixture aged asphalt extraction and analysis instrument and test method |
| CN108531206B (en) * | 2018-04-03 | 2020-12-29 | 西南石油大学 | High-evolution pyrobitumen high-temperature circulating dissolving device and method |
| CN113047122B (en) * | 2021-04-02 | 2022-08-19 | 安徽安能建设集团有限公司 | Old asphalt concrete recycling equipment |
| CN113699851A (en) * | 2021-09-14 | 2021-11-26 | 山东交通学院 | Waste asphalt pavement material crushing, screening and recycling system and screening and recycling method |
| CN115078175A (en) * | 2022-07-25 | 2022-09-20 | 佛山市交通科技有限公司 | Method for testing aggregate density after extraction of asphalt recovery old material |
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