CN105176559A - Device and method for quickly recovering waste asphalt from waste asphalt pavement material - Google Patents
Device and method for quickly recovering waste asphalt from waste asphalt pavement material Download PDFInfo
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- CN105176559A CN105176559A CN201510633508.XA CN201510633508A CN105176559A CN 105176559 A CN105176559 A CN 105176559A CN 201510633508 A CN201510633508 A CN 201510633508A CN 105176559 A CN105176559 A CN 105176559A
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Abstract
The invention relates to a device and a method for quickly recovering waste asphalt from a waste asphalt pavement material, is used for quickly extracting asphalt from the waste asphalt pavement material, is beneficial to a method for accurately measuring recovered asphalt property indexes and belongs to the field of road material engineering. According to the novel method for quickly recovering the waste asphalt, through research and comparison, the vacuum negative-pressure technology is used, filtration and distillation systems are based on an airtight system, quick filtration and distillation are performed, the distillation temperature is reduced, CO2 is used as vacuum negative-pressure shielding gas to reduce asphalt oxidation and test danger coefficients, the technical problem that impurities and trichloroethylene solvents exist in recovered asphalt is solved effectively, so that the recovered asphalt property indexes can be measured accurately, and a foundation is laid for recycling the waste asphalt pavement material more scientifically and reasonably in the later period.
Description
technical field:
The invention belongs to pavement material engineering field, be specifically related to the device and method of Bituminous concrete surface in a kind of quick recovery waste asphalt pavement material.
background technology:
At present, along with the development that highway in China is built, each large motorway in succession enters maintenance, extends, overhauls the stage, will produce a large amount of waste asphalt mixtures in the process, therefore, the Collection and utilization of waste asphalt pavement material has great practical significance.
In the maintenance phase; a large amount of waste asphalt mixtures will be produced; in the face of the energy dilemma of China and the degree of aging of waste asphalt mixture are by the adding proportion present situation of the selection and regenerator that directly affect Applied of Asphalt Pavement Recycle Technique, evaluate the basis that former pavement asphalt degree of aging is Regenerative Technique of Asphalt Mixture.For the accurate evaluation of the degree of aging of former pavement asphalt, in current China " highway engineering pitch and Asphalt Mixture Experiment code " JTGE20-2011, regulation has two kinds of bitumen recovery process: Abson method and rotary evaporation.Test-results according to these two kinds of recovery methods shows, and the pitch after recovery also exists a small amount of impurity and trichloroethylene solvent, directly can affect the evaluation index of ageing of asphalt degree like this.
Therefore, the present invention is directed to these problems and propose new method by studying to compare, contribute to solving the pitch after reclaiming and also there is a small amount of impurity and this technical problem of trichloroethylene solvent.
summary of the invention:
The object of the invention is to can Rapid extraction waste asphalt pavement material pitch, and contribute to Accurate Determining and reclaim asphaltic nature and refer to calibration method, specification shop experiment operates.
In quick recovery waste asphalt pavement material, a device for Bituminous concrete surface, comprises dissolution kettle, strainer, vacuum system, Distallation systm, solvent receiving system and pitch receiving tank; Described vacuum system comprises vacuum receiving tank and vacuum pump; Described Distallation systm comprises still kettle, prolong, agitator motor and agitator, and described stirrer is positioned at outside still kettle, and agitator is positioned at still kettle and is connected with stirrer; Described solvent receiving system comprises solvent receiving tank and solvent barrel, and described solvent barrel is connected with solvent receiving tank; Described dissolution kettle is connected with strainer, strainer is connected with still kettle upper end by vacuum receiving tank, still kettle lower end is connected with pitch receiving tank, described vacuum pump one end the other end that is connected with vacuum receiving tank is connected with solvent receiving tank, and described prolong one end the other end that is connected with still kettle is connected with solvent receiving tank.
Described still kettle is outside equipped with oil bath heating jacket.
Described vacuum receives on pump, pitch receiving tank and solvent receiving tank and is provided with atmospheric air port.
Filter cloth is provided with in described strainer.
A method for Bituminous concrete surface in quick recovery waste asphalt pavement material, comprises the following steps:
Step 1: get waste asphalt mixture, heats more than 30min after drying up moisture make it loose with blower in 100 DEG C ± 5 DEG C baking ovens; Soak compound with trieline and be no less than 24h, pitch is fully dissolved, and dissolved dilution ratio is the ratio of pitch and trieline is 1:10;
Step 2: carry out natural gravity sedimentation, until bulk impurity sedimentation is complete; Carry out centrifugal settling again, until solution clarification; Described centrifugal settling requires that centrifuge speed is not less than 3000r/min, and centrifugal force should not be less than 770G(universal gravity constant);
Step 3: the pitch trieline solution after sedimentation is placed in dissolution kettle, then enters strainer, utilize vacuum pump vacuum principle, fast pitch trieline solution is carried out vacuum filtration by filter cloth;
Step 4: the solution after filtration enters in encloses container vacuum distilling system, under the pressure of 20kpa, solution reaches the temperature of 30 DEG C ~ 40 DEG C, distill out trichloroethylene solvent, what distill out trichloroethylene solvent enters the recycling of solvent receiving system, and the pitch obtained after distillation enters pitch receiving tank.If the asphalt surface disturbance after reclaiming is comparatively large, make asphalt surface rough, smooth, pitch can be placed in 100 DEG C of thermostatic drying chamber heating 5 ~ 10min and get final product (this process CO2 is as protection gas).
Described filtration and still-process all carry out under relative vacuum condition, and CO2 protects gas as relative vacuum.
When natural gravity sedimentation and centrifugal settling process are carried out to pitch trieline solution, require that centrifuge speed is not less than 3000r/min, centrifugal force should not be less than 770G(universal gravity constant), the solution after such settlement treatment, for follow-up vacuum filtration is got ready.
Solution after sedimentation is placed in the whole vacuum system of filtering and distilling.Utilize vacuum principle, solution can be filtered by filter cloth by filtering system fast, can improve filtration efficiency, reduce impurity to a great extent and leak filter, solvent distillation purity improves, and last gained pitch is impure to be reduced with solvent, and overall waste asphalt extracting speed is greatly improved; Be carry out under relative vacuum condition during distillation, solution boiling point lowering under negative pressure, greatly reduces the danger coefficient of test.Vacuum pressure is at 20kpa; CO2 protects gas as relative vacuum, and temperature reaches the temperature of 30 DEG C ~ 40 DEG C, can steam solvent trichlorethylene fast; reduce the environment of high temperature aerobic; reduce the danger coefficient of test and construction, distillation speed is very fast, reduces the volatilizes of pitch; make the solvent purity that steams higher, recyclable recycling.
Because carry out under filtration and distillation whole system are all in relative vacuum condition; CO2 protects gas as relative vacuum; when improving pitch and heating and the contact of air; reduce the oxidation of pitch in extractive process; measure asphaltic nature index more accurate; high efficiente callback utilizes, for follow-up regeneration techniques lays good basis.
Compared with prior art, the beneficial effect that the present invention has is: can Rapid extraction waste asphalt pavement material pitch, reduces the danger coefficient of test and construction, measures asphaltic nature index more accurate, pitch and solvent high-efficiency are recycled, for follow-up regeneration techniques lays good basis.
Accompanying drawing explanation
Fig. 1: the method flow diagram of Bituminous concrete surface in a kind of quick recovery waste asphalt pavement material;
Fig. 2: the setting drawing of Bituminous concrete surface in a kind of quick recovery waste asphalt pavement material;
Label: 1 a, valve, 2, No. two valves, 3, No. three valves, 4, No. four valves, 5, No. five valves, 6, No. six valves, 7, No. seven valves, 8, No. eight valves, 9, No. nine valves, 10, No. ten valves, 11, dissolution kettle, 12, strainer, 13, vacuum receiving tank, 14, vacuum pump, 15, still kettle, 16, agitator motor, 17, agitator, 18, pitch receiving tank, 19, solvent receiving tank, 20, solvent barrel, 21, prolong, 22, atmospheric air port, 23, No. two atmospheric air ports, 24, No. three atmospheric air ports, 25, oil bath heating jacket.
Embodiment
In quick recovery waste asphalt pavement material, a device for Bituminous concrete surface, comprises dissolution kettle 11, strainer 12, vacuum system, Distallation systm, solvent receiving system and pitch receiving tank 18; Described vacuum system comprises vacuum receiving tank 13 and vacuum pump 14; Described Distallation systm comprises still kettle 15, prolong 21, agitator motor 16 and agitator 17, and described stirrer 16 is positioned at outside still kettle 15, and agitator 17 is positioned at still kettle 15 and is connected with stirrer 16; Described solvent receiving system comprises solvent receiving tank 19 and solvent barrel 20, and described solvent barrel 20 is connected with solvent receiving tank 19; Described dissolution kettle 11 is connected with strainer 12, strainer 12 is connected with still kettle 15 upper end by vacuum receiving tank 13, still kettle 15 lower end is connected with pitch receiving tank 18, described vacuum pump 14 one end the other end that is connected with vacuum receiving tank 13 is connected with solvent receiving tank 19, and described prolong 21 one end the other end that is connected with still kettle 15 is connected with solvent receiving tank 19.
Described still kettle 15 is outside equipped with oil bath heating jacket 25.
On described vacuum receiving tank 13, pitch receiving tank 18 and solvent receiving tank 19, correspondence is provided with an atmospheric air port 22, No. two atmospheric air ports 23 and No. three atmospheric air ports 24.
Filter cloth is provided with in described strainer 12.
Carry out a method for waste asphalt pavement salvage material Bituminous concrete surface fast, specific as follows:
Embodiment one:
Step 1: get waste asphalt mixture, heats 30min make it loose with blower in 100 DEG C of baking ovens after drying up moisture, soak compound 24h with trieline, pitch is fully dissolved, and dissolved dilution ratio is the ratio of pitch and trieline is 1:10;
Step 2: carry out natural gravity sedimentation, until bulk impurity sedimentation is complete; Carry out centrifugal settling again, until solution clarification; Centrifuge speed is at 3000r/min, and centrifugal force is at 770G(universal gravity constant);
Step 3: open all valves, passes into protection gas CO2, after being full of whole system, closes all valves.Open a valve 1 again and pour solution into dissolution kettle 11, open No. three valves 3 and No. four valves 4, open vacuum pump 14, then open No. two valves 2, solution by strainer 12, filters complete fast;
Step 4: close No. three valves 3 and No. four valves 4, open an atmospheric air port 22, No. seven valves 7, No. eight valves 8 and No. nine valves 9, open vacuum pump 14 and control Distallation systm tank pressure 20kpa, close No. seven valves 7, phlegma is passed in prolong 21, open No. five valves 5 and No. six valves 6 again, the solution after filtration enters still kettle 15 smoothly.Close No. six valves 6, open agitator motor 16, oil bath is heated to 30 DEG C, and trichloroethylene solvent starts to steam; When pipe to be condensed 21 li does not have a liquid condensation, close No. eight valves 8, No. nine valves 9 and vacuum pump 14, open No. seven valves 7, the pitch after distillation enters in pitch receiving tank 18 smoothly, closes agitator motor 16.Open No. two atmospheric air ports 23 and No. ten valves 10, the trichloroethylene solvent after recovery enters solvent barrel 20 by solvent receiving tank 19 and weighs; Open No. three atmospheric air ports 24, recover normal pressure, be cooled to after normal temperature until pitch, bitumen recovery is complete.In filtration and still-process, recovering normal pressure, is all as protection gas when decompression and pressurize with CO2.
Embodiment two:
Step 1: get waste asphalt mixture, heats 50min make it loose with blower in 95 DEG C of baking ovens after drying up moisture, soak compound 24h with trieline, pitch is fully dissolved, and dissolved dilution ratio is the ratio of pitch and trieline is 1:10;
Step 2: carry out natural gravity sedimentation, until bulk impurity sedimentation is complete; Carry out centrifugal settling again, until solution clarification; Centrifuge speed is at 3000r/min, and centrifugal force is at 770G(universal gravity constant);
Step 3: open all valves, passes into protection gas CO2, after being full of whole system, closes all valves.Open a valve 1 again and pour solution into dissolution kettle 11, open No. three valves 3 and No. four valves 4, open vacuum pump 14, then open No. two valves 2, solution by strainer 12, filters complete fast;
Step 4: close No. three valves 3 and No. four valves 4, open an atmospheric air port 22, No. seven valves 7, No. eight valves 8 and No. nine valves 9, open vacuum pump 14 and control Distallation systm tank pressure 20kpa, close No. seven valves 7, phlegma is passed in prolong 21, open No. five valves 5 and No. six valves 6 again, the solution after filtration enters still kettle 15 smoothly.Close No. six valves 6, open agitator motor 16, oil bath is heated to 35 DEG C, and trichloroethylene solvent starts to steam; When pipe to be condensed 21 li does not have a liquid condensation, close No. eight valves 8, No. nine valves 9 and vacuum pump 14, open No. seven valves 7, the pitch after distillation enters in pitch receiving tank 18 smoothly, closes agitator motor 16.Open No. two atmospheric air ports 23 and No. ten valves 10, the trichloroethylene solvent after recovery enters solvent barrel 20 by solvent receiving tank 19 and weighs; Open No. three atmospheric air ports 24, recover normal pressure, be cooled to after normal temperature until pitch, bitumen recovery is complete.In filtration and still-process, recovering normal pressure, is all as protection gas when decompression and pressurize with CO2.
Embodiment three:
Step 1: get waste asphalt mixture, heats 60min make it loose with blower in 105 DEG C of baking ovens after drying up moisture, soak compound 24h with trieline, pitch is fully dissolved, and dissolved dilution ratio is the ratio of pitch and trieline is 1:10;
Step 2: carry out natural gravity sedimentation, until bulk impurity sedimentation is complete; Carry out centrifugal settling again, until solution clarification; Centrifuge speed is at 3000r/min, and centrifugal force is at 770G(universal gravity constant);
Step 3: open all valves, passes into protection gas CO2, after being full of whole system, closes all valves.Open a valve 1 again and pour solution into dissolution kettle 11, open No. three valves 3 and No. four valves 4, open vacuum pump 14, then open No. two valves 2, solution by strainer 12, filters complete fast;
Step 4: close No. three valves 3 and No. four valves 4, open an atmospheric air port 22, No. seven valves 7, No. eight valves 8 and No. nine valves 9, open vacuum pump 14 and control Distallation systm tank pressure 20kpa, close No. seven valves 7, phlegma is passed in prolong 21, open No. five valves 5 and No. six valves 6 again, the solution after filtration enters still kettle 15 smoothly.Close No. six valves 6, open agitator motor 16, oil bath is heated to 40 DEG C, and trichloroethylene solvent starts to steam; When pipe to be condensed 21 li does not have a liquid condensation, close No. eight valves 8, No. nine valves 9 and vacuum pump 14, open No. seven valves 7, the pitch after distillation enters in pitch receiving tank 18 smoothly, closes agitator motor 16.Open No. two atmospheric air ports 23 and No. ten valves 10, the trichloroethylene solvent after recovery enters solvent barrel 20 by solvent receiving tank 19 and weighs; Open No. three atmospheric air ports 24, recover normal pressure, be cooled to after normal temperature until pitch, bitumen recovery is complete.。Asphalt surface disturbance after recovery is comparatively large, makes asphalt surface rough, smooth, pitch is placed in 100 DEG C of thermostatic drying chamber heating 10min and gets final product (this process CO2 is as protection gas).In filtration and still-process, recovering normal pressure, is all as protection gas when decompression and pressurize with CO2.
Claims (7)
1. reclaim a device for Bituminous concrete surface in waste asphalt pavement material fast, it is characterized in that comprising dissolution kettle, strainer, vacuum system, Distallation systm, solvent receiving system and pitch receiving tank; Described vacuum system comprises vacuum receiving tank and vacuum pump; Described Distallation systm comprises still kettle, prolong, agitator motor and agitator, and described stirrer is positioned at outside still kettle, and agitator is positioned at still kettle and is connected with stirrer; Described solvent receiving system comprises solvent receiving tank and solvent barrel, and described solvent barrel is connected with solvent receiving tank; Described dissolution kettle is connected with strainer, strainer is connected with still kettle upper end by vacuum receiving tank, still kettle lower end is connected with pitch receiving tank, described vacuum pump one end the other end that is connected with vacuum receiving tank is connected with solvent receiving tank, and described prolong one end the other end that is connected with still kettle is connected with solvent receiving tank.
2. reclaim a method for Bituminous concrete surface in waste asphalt pavement material fast, it is characterized in that comprising the following steps:
Step 1: get waste asphalt mixture, heats more than 30min after drying up moisture make it loose with blower in 100 DEG C ± 5 DEG C baking ovens; Soak compound with trieline and be no less than 24h, pitch is fully dissolved, and dissolved dilution ratio is the ratio of pitch and trieline is 1:10;
Step 2: carry out natural gravity sedimentation, until bulk impurity sedimentation is complete; Carry out centrifugal settling again, until solution clarification;
Step 3: the pitch trieline solution after sedimentation is placed in dissolution kettle, then enters strainer, utilize vacuum pump vacuum principle, fast pitch trieline solution is carried out vacuum filtration by filter cloth;
Step 4: the solution after filtration enters in encloses container vacuum distilling system, under the pressure of 20kpa, solution reaches the temperature of 30 DEG C ~ 40 DEG C, distill out trichloroethylene solvent, what distill out trichloroethylene solvent enters the recycling of solvent receiving system, and the pitch obtained after distillation enters pitch receiving tank.
3. the device of Bituminous concrete surface in a kind of quick recovery waste asphalt pavement material told according to claim 1, it is characterized in that, described still kettle is outside equipped with oil bath heating jacket.
4. in a kind of quick recovery waste asphalt pavement material told according to claim 1, the device of Bituminous concrete surface, is characterized in that, described vacuum receives on pump, pitch receiving tank and solvent receiving tank and is provided with atmospheric air port.
5. in a kind of quick recovery waste asphalt pavement material told according to claim 1, the device of Bituminous concrete surface, is characterized in that, be provided with filter cloth in described strainer.
6. in a kind of quick recovery waste asphalt pavement material told according to claim 2, the method for Bituminous concrete surface, is characterized in that, described centrifugal settling requires that centrifuge speed is not less than 3000r/min, and centrifugal force should not be less than 770G(universal gravity constant).
7. the method for Bituminous concrete surface in a kind of quick recovery waste asphalt pavement material told according to claim 2, it is characterized in that, described filtration and still-process all carry out under relative vacuum condition, and CO2 protects gas as relative vacuum.
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Cited By (5)
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| CN108531206A (en) * | 2018-04-03 | 2018-09-14 | 西南石油大学 | A kind of the pyrobitumen high temperature circulation dissolver and method of high evolution |
| 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 |
| CN113047122A (en) * | 2021-04-02 | 2021-06-29 | 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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| Publication number | Priority date | Publication date | Assignee | Title |
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| 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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