CN102733291B - Regeneration method of asphalt mixture modifier for absorbing automobile exhaust - Google Patents
Regeneration method of asphalt mixture modifier for absorbing automobile exhaust Download PDFInfo
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- CN102733291B CN102733291B CN201110436754.8A CN201110436754A CN102733291B CN 102733291 B CN102733291 B CN 102733291B CN 201110436754 A CN201110436754 A CN 201110436754A CN 102733291 B CN102733291 B CN 102733291B
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Abstract
The invention discloses a regeneration method of an asphalt mixture modifier for absorbing automobile exhaust, comprising the following steps: (1) cleaning and recycling: cleaning asphalt pavements paved with the modifier for asphalt mixtures by using high pressure water, then conducting vacuum suction, and recycling the modifier and clogs in gaps obtained after cleaning; (2) screening: filtering and screening the regenerants obtained by the step (1), removing the regenerants which have the particle size that is larger than that of the modifier and less than that of the modifier, and then carrying out ultrasonic cleaning on the screened regenerants; and (3) activating: dipping the modifier processed by ultrasonic cleaning in an alkali solution with the concentration of 10-40 wt% for 30-60 min, and then drying for 5-10 h in a vacuum environment at a constant temperature of 50-100 DEG C to obtain the activated modifier. The regeneration method of the invention has the advantages of simpleness, easiness in operate, economy, environmental protection, and general applicability, is not only suitable for generating modifiers for alkali-containing composite porous materials, but also suitable for generating other asphalt mixture modifiers for absorbing automobile exhaust.
Description
Technical field
The present invention relates to road composite material and environmental protection crossing domain, particularly relate to the renovation process using porous material for the preparation of the asphalt mixed material modifier of absorbing automobile exhaust.
Background technology
Along with economic development, the quickening of urbanization process, the raising day by day of people's living standard, increases suddenly to automobile demand amount, result in vehicle exhaust discharge quantity accordingly and grows with each passing day, and causes the situation that urban air pollution is serious.In recent years, such as the investigation and application of the vehicle maintenance service technology such as photocatalytic degradation, physical chemistry absorbing automobile exhaust, alleviated the contradiction between motor vehicle exhaust emission and urban air-quality in a certain degree.But the limitation of these Technology Restrictions in self and the particularity of traffic route; not only process tail gas limited in one's ability; significantly; for same traffic route; these technology are difficult to recycle; namely allow to be implemented again, owing to being subject to the serious restriction of the factors such as cost, technology, environmental protection, hindering the application of these technology further and promote.In addition, vehicle maintenance service technology, as Photocatalyst, along with it is in the passing of road Applicative time, its performance progressively decays, and the catalytic activity of some catalytic species even lost efficacy within the extremely short time, efficiently cannot process vehicle exhaust for a long time.The regeneration technology of thus efficient, lasting, economic motor vehicle exhaust emission treatment technology removes the application of these technology and promotes the effective means hindered.
Make a general survey of the investigation and application situation of domestic motor vehicle exhaust emission treatment technology, not only relevant number of techniques is rare, and kind is single, and about the systemic renovation process of these technology and technology blank especially.
Applicant have developed a kind of asphalt mixed material modifier for absorbing automobile exhaust, have developed the renovation process for renewable asphalt mixture modifier further for this modifier simultaneously.
Summary of the invention
The object of the invention is to the blank of the regeneration technology of the asphalt mixed material modifier filling up China's Absorbable rod vehicle exhaust, the renovation process for asphalt mixed material modifier of a kind of simple, easy, economy, environmental protection is provided.
In order to realize object of the present invention, the invention provides a kind of renovation process of the asphalt mixed material modifier for absorbing automobile exhaust, this renovation process comprises following treatment step:
(1) clean and reuse: adopt water under high pressure to clean the flexible pavement being equipped with asphalt mixed material modifier, the suction of cleaning final vacuum, recovery and rinsing modifier out and space obstruction;
(2) screen: the regenerant of step () is carried out filtering, screening, remove particle diameter and be greater than the regenerant that described modifier and particle diameter be less than described modifier grain size, then ultrasonic cleaning is carried out to garbled regenerant;
(3) activate: the modifier after ultrasonic cleaning being immersed in concentration is 30-60min in the aqueous slkali of 10-40wt%, the modifier after then namely dry 5-10h obtains activation in 50-100 DEG C of constant-temperature vacuum environment.
In this patent renovation process, clean and reuse step is using giant and vacuum drawn as the core of this step, asphaltic road-mix surface course function recovery vehicle can be adopted to carry out operation implement, giant cleaning mainly utilizes cavity effect and fluidics, cavity effect refers to because high velocity jet can produce the cavity of countless air bubble-shaped in static liquid, produces surge during this bubbles burst; Utilize this pressure can remove modifier and the space obstruction of partial exfoliation, high vacuum extracts and has then effectively reclaimed the modifier and space obstruction that come off.Actual can being decomposed into of screening step is filtered and screening, ultrasonic cleaning three aspects; Use alkaline matter activation modifier is the core content of activation step.
Further preferably, described clean and reuse step adopts asphaltic road-mix surface course function recovery vehicle to carry out cleaning suction recovery to flexible pavement.
Further preferably, filtration described in step (two) refers to and loads in the container using water as medium by regenerant, stirs 10-60min with the mixing speed of 10-50r/min; Stir after stopping, after allowing the mixed solution of water and regenerant leave standstill 30-90min, the floating thing of the elimination water surface.
Further preferably, described in step (two), screening refers to by specification from the regenerant after 1-800 object square opening sieves successively screening and filtering.
Further preferably, ultrasonic cleaning described in step (two) refers to that supersonic cleaning machine is auxiliary cleaning equipment, and cleaning frequency is 30000-80000Hz, and scavenging period is 30-60min with sewage remaining after filtered and recycled thing cleaning modifier.
Further preferably, this renovation process also comprises the applying step again of modifier, this step refers to that the modifier after by activation is spread in and to pave but without the new road surface of compacting, or be directly spread on the old pavement that used, then, after pavement compaction, modifier enters into the space of bituminous mixture.
Technical characterstic of the present invention:
1) technology and equipment of the present invention is simple, clean and reuse, screening, activate these technological operations feasibility high, equipment adopts general equipment, and cost is lower.
2) regeneration technology of the present invention still belongs to the asphalt mixed material modifier of regeneration for absorbing automobile exhaust of domestic first subsystem, and systematicness is strong, has not only reclaimed modifier, can also again utilize this modifier.
3) utilization of the present invention can recycling modifier, not only environmental protection, also economizes on resources and cost.
4) application process environmental protection of the present invention, produces without secondary pollution, can recycle for the pure water cleaned.
5) regeneration methods of the invention is to the favorable regeneration effect of modifier, compares not regenerated modifier, and the absorptive capacity decay of the modifier after regeneration to gas is minimum, still remains the absorptive capacity of efficient stable.
Regeneration methods of the invention also has certain universality, is not only applicable to the regeneration of carrying alkali composite porous material modifier, is also applicable to the regeneration of the asphalt mixed material modifier of other absorbing automobile exhausts, as the regeneration of photocatalytic degradation tail gas technology.
Detailed description of the invention
Below in conjunction with concrete embodiment, one step explanation is carried out to the present invention.
One, modifier preparation
A preparation method for renewable asphalt mixture modifier, preparation process is as follows
(1) in confined conditions, alkali compounds and pure water are mixed with the solution that alkali concn is 10 ~ 40wt%, described alkali compounds is one or both in NaOH, potassium hydroxide;
(2) porous material is placed in the container that 40 ~ 60 DEG C of deionized waters are housed, cleans described porous material 5 ~ 10min with supersonic cleaning machine with the frequency of 25000 ~ 100000Hz; Described porous material is one or more in Powdered Activated Carbon, activated carbon granule, NACF, carbon black, meso-porous alumina, activated alumina; The particle diameter scope of wherein said Powdered Activated Carbon and described NACF is 0.01 ~ 500 μm, and micropore diameter scope is 1 ~ 300nm, and specific area is 500 ~ 1600m
2/ g; The particle diameter scope of described activated carbon granule and described carbon black is 0.1 ~ 20mm, and micropore diameter scope is 1 ~ 500nm, and specific area is 400 ~ 1200m
2/ g; The particle diameter scope of described meso-porous alumina and described activated alumina is 0.1 ~ 20mm, and micropore diameter scope is respectively 1.5 ~ 50nm and 1 ~ 10000nm, and specific area is 200 ~ 900m
2/ g.
(3) described porous material is placed in the dry 5 ~ 10h of constant-temperature vacuum baking oven of 50 ~ 100 DEG C;
(4) described porous material is put into the solution that step () is prepared, dipping 30 ~ 60min; The weight portion of porous material and alkali compounds is respectively porous material 80 ~ 90 parts, alkali compounds 10 ~ 20 parts;
(5) porous material after dipping is positioned over dry 5 ~ 10h in the constant-temperature vacuum baking oven of 50 ~ 100 DEG C, prepares renewable asphalt mixture modifier.
For the ease of testing modifier, now make a modifier according to above-mentioned steps:
First be the potassium hydroxide solution of 35wt% with pure water compound concentration; Then be 0.5mm by particle diameter, microscopic aperture scope is 10 ~ 300nm, and specific area is 650m
2the activated carbon granule of/g is positioned in 60 DEG C of deionized waters, with supersonic cleaning machine with the frequency of 50000Hz cleaning 10min; Again in 100 DEG C of constant-temperature vacuum baking ovens, be dried 5h; Finally the activated carbon granule of oven dry is immersed in 50min in potassium hydroxide solution; Finally be placed on by the active carbon adsorbing potassium hydroxide in 100 DEG C of constant-temperature vacuum baking ovens, namely dry 7h prepares a kind of modifier that can be used for bituminous mixture as absorbing automobile exhaust again.
Two, the preparation of bituminous mixture
According to specification JTGF40-2004 hot-mix asphalt mixture mixing proportion design method, at 180 DEG C of mixs, shaping in 150 DEG C of rollings, take AC-13 as gradation types, carry out Marshall optimum oil-stone ratio contrived experiment, determine that optimum asphalt content is 4.3%.
The component of AC-13 bituminous mixture and content are in table 1
Table 1 bituminous mixture forms
Mineral aggregate gradation is in table 2
Table 2 mineral aggregate forms
According to specification JTGF40-2004 hot-mix asphalt mixture mixing proportion design method, and then prepare AC-20 bituminous mixture and SMA-13, OGFC-16 bituminous mixture respectively.
Three, the use of modifier
By the above-mentioned modifier prepared with 100g/m
2spreading amount, be evenly sprinkling upon AC-13, AC-20, SMA-13, OGFC-16 bituminous mixture experiment section, and then rolling is shaping, specific as follows:
Embodiment 1
Use road asphalt mixture pavement function recovery vehicle to AC-13 bituminous mixture experiment section, road speed is 2.5km/h, and the form of cleaning with high pressure water washing and air pocket reclaims modifier and obstruction with sewage absorption; Then regenerant is loaded in the plastic containers of the 1m × 2m × 2m using water as decentralized medium, stir 40min with the mixing speed of 20r/min; Stir after stopping, allowing the mixed solution system of water and regenerant leave standstill 50min, afterwards the floating thing of the elimination water surface; Screen successively from 1-800 object square opening sieves by specification afterwards, according to the particle size range 4-10mm of modifier, remove and be less than 4mm and the regenerant being greater than 10mm compared with its particle diameter, the main body of remaining regenerant is then modifier; Then with sewage remaining after filtered and recycled thing cleaning modifier, supersonic cleaning machine is auxiliary cleaning equipment, and cleaning frequency is 60000Hz, and scavenging period is 20min; Finally will reclaim and be immersed in concentration through the modifier of ultrasonic cleaning be 40min in the sodium hydrate aqueous solution of 20wt%, then dry 6h in 100 DEG C of constant-temperature vacuum environment.
Embodiment 2
Use road asphalt mixture pavement function recovery vehicle to AC-20 bituminous mixture experiment section, the speed of a motor vehicle is 1.5km/h, and the form of cleaning with high pressure water washing and air pocket reclaims modifier and obstruction with sewage absorption; Then regenerant is loaded in the plastic containers of the 2m × 4m × 3m using water as decentralized medium, stir 50min with the mixing speed of 40r/min; Stir after stopping, after allowing the mixed solution system of water and regenerant leave standstill 60min, the floating thing of the elimination water surface; Then screen successively from 1-800 object square opening sieves by specification, according to the particle size range 1-15mm of modifier, remove and be less than 1mm and the regenerant being greater than 15mm compared with its particle diameter, remaining main body is then modifier; Then with sewage remaining after filtered and recycled thing cleaning modifier, supersonic cleaning machine is auxiliary cleaning equipment, and cleaning frequency is 100000Hz, and scavenging period is 35min; Finally will reclaim and be immersed in concentration through the modifier of ultrasonic cleaning be 60min in the sodium hydrate aqueous solution of 15wt%, then dry 8h in 100 DEG C of constant-temperature vacuum environment.
Embodiment 3
Use road asphalt mixture pavement function recovery vehicle to SMA-13 bituminous mixture experiment section, the speed of a motor vehicle is 3km/h, and the form of cleaning with high pressure water washing and air pocket reclaims modifier and obstruction with sewage absorption; Then regenerant is loaded in the plastic containers of the 2m × 3m × 3m using water as decentralized medium, stir 50min with the mixing speed of 30r/min; Stir after stopping, after allowing the mixed solution system of water and regenerant leave standstill 60min, the floating thing of the elimination water surface; Then screen successively from 1-800 object square opening sieves by specification, according to the particle size range 5-15mm of modifier, remove and be less than 5mm and the regenerant being greater than 15mm compared with its particle diameter, remaining main body is then modifier; Then with sewage remaining after filtered and recycled thing cleaning modifier, supersonic cleaning machine is auxiliary cleaning equipment, and cleaning frequency is 95000Hz, and scavenging period is 40min; Finally will reclaim and be immersed in concentration through the modifier of ultrasonic cleaning be 50min in the sodium hydrate aqueous solution of 30wt%, then dry 9h in 100 DEG C of constant-temperature vacuum environment.
By the modifier spreading after activation process in testing section, after bituminous mixture laying, with 150g/m at the OGFC-13 built
2spreading amount, the modifier rapidly after uniform spreading activation; Then steel wheel and rubber tire compacting road surface is used.After one week, bore core and sampling in OGFC-13 experiment section, adopt the form absorbing gas in airtight container static state, analog study and analysis are after using regeneration technology of the present invention, and the bituminous mixture of its correspondence is to the absorptive capacity of vehicle exhaust.Test result is in table 3, and wherein the specification of core is 10.04cm × 4cm.Wherein 10.04cm is the diameter of core, and 4cm is its height, is also the thickness that OGFC-13 experiment section paves.Adopt the form absorbing gas in airtight container static state, core is put into the airtight container 1h that variable concentrations gas with various is housed, detect core to the absorption strength situation of gas each in container.Concrete condition is in table 3.
The concentration of gas in table 3 airtight container
Visible according to table 3, the modifier through regeneration technology regeneration of the present invention remains extremely strong absorptive capacity to various gas.
Embodiment 4
Use road asphalt mixture pavement function recovery vehicle to OGFC-16 bituminous mixture experiment section, the speed of a motor vehicle is 2km/h, and the form of cleaning with high pressure water washing and air pocket reclaims modifier and obstruction with sewage absorption; Then regenerant is loaded in the plastic containers of the 2m × 3m × 3m using water as decentralized medium, stir 60min with the mixing speed of 40r/min; Stir after stopping, after allowing the mixed solution system of water and regenerant leave standstill 60min, the floating thing of the elimination water surface; Then screen successively from 1-800 object square opening sieves by specification, according to the particle size range 1-20mm of modifier, remove and be less than 1mm and the regenerant being greater than 20mm compared with its particle diameter, remaining main body is then modifier; Then with sewage remaining after filtered and recycled thing cleaning modifier, supersonic cleaning machine is auxiliary cleaning equipment, and cleaning frequency is 75000Hz, and scavenging period is 45min; Finally will reclaim and be immersed in concentration through the modifier of ultrasonic cleaning be 60min in the sodium hydrate aqueous solution of 20wt%, then dry 8h in 100 DEG C of constant-temperature vacuum environment.
By the OGFC-16 experimental road road section surface of the modifier spreading after activation process before reclaiming at it, then use pneumatic-tired rollers compacting.After one week, core boring sampling, adopts and absorbs the form of gas in seal cavity static state, the bituminous mixture that simulation contrast employs this modifier this experiment section application initial stage with after regeneration technology of the present invention to the absorptive capacity of vehicle exhaust.Test result is in table 4, and wherein the specification of core is 10.04cm × 4cm.Wherein 10.04cm is the diameter of core, and 4cm is its height, is also the thickness that OGFC-16 paves.These two kinds of cores all place 2h in the airtight container that variable concentrations gas with various is housed.Then the change in concentration situation of each gas in inspection instrument.
The concentration of gas in table 4 airtight container
As seen from Table 4, in the closed container of the OGFC core applied again after the OGFC-16 core at applying modified dose of initial stage regenerates with modifier, each gas concentration size is substantially identical, therefore, use the modifier after regeneration technology of the present invention, it is almost identical with its application starting stage to the absorptive capacity of gas after applying again, illustrates that regeneration technology of the present invention is efficient, stable.
Those skilled in the art will recognize that; above-mentioned detailed description of the invention is exemplary; to enable those skilled in the art better understand this patent content; should not be understood as the restriction to this patent protection domain; as long as according to this patent disclose any equivalent change done of spirit or modification, all fall into this patent protection domain.
Claims (6)
1. for a renovation process for the asphalt mixed material modifier of absorbing automobile exhaust, it is characterized in that: this renovation process comprises following treatment step:
(1) clean and reuse: adopt water under high pressure to clean the flexible pavement being equipped with asphalt mixed material modifier, the suction of cleaning final vacuum, recovery and rinsing modifier out and space obstruction;
(2) screen: the regenerant of step () is carried out filtering, screening, remove particle diameter and be greater than the regenerant that described modifier and particle diameter be less than described modifier grain size, then ultrasonic cleaning is carried out to garbled regenerant;
(3) activate: the modifier after ultrasonic cleaning being immersed in concentration is 30-60min in the aqueous slkali of 10-40wt%, the modifier after then namely dry 5-10h obtains activation in 50-100 DEG C of constant-temperature vacuum environment.
2. renovation process according to claim 1, is characterized in that: described clean and reuse step adopts asphaltic road-mix surface course function recovery vehicle to carry out cleaning suction to flexible pavement and reclaims.
3. renovation process according to claim 1, is characterized in that: filtration described in step (two) refers to and loads in the container using water as medium by regenerant, stirs 10-60min with the mixing speed of 10-50r/min; Stir after stopping, after allowing the mixed solution of water and regenerant leave standstill 30-90min, the floating thing of the elimination water surface.
4. renovation process according to claim 1, is characterized in that: screening described in step (two) refers to by specification from the regenerant after 1-800 object square opening sieves successively screening and filtering.
5. renovation process according to claim 1, it is characterized in that: ultrasonic cleaning described in step (two) refers to sewage remaining after filtered and recycled thing cleaning modifier, supersonic cleaning machine is auxiliary cleaning equipment, cleaning frequency is 30000-80000Hz, and scavenging period is 30-60min.
6. renovation process according to claim 1, it is characterized in that: the applying step more also comprising modifier, this step refers to that the modifier after by activation is spread in and to pave but without the new road surface of compacting, or be directly spread on the old pavement that used, then, after pavement compaction, modifier enters into the space of bituminous mixture.
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| CN104164817B (en) * | 2014-08-18 | 2016-08-24 | 北京建筑大学 | A kind of method for designing of the heat regeneration asphalt mixture of high RAP ratio |
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| US4318619A (en) * | 1977-06-21 | 1982-03-09 | Iowa Manufacturing Company Of Cedar Rapids, Iowa | Method of and apparatus for asphaltic concrete hot mix recycling |
| JPH06320197A (en) * | 1993-05-14 | 1994-11-22 | Kanji Nakayama | Device and method for dewatering and recovery of sludge |
| CN2473043Y (en) * | 2001-04-27 | 2002-01-23 | 冯文伟 | Water saving type circulation water car cleaning device |
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Address after: 7th floor, No.3, Lane 701, chuanqiao Road, China (Shanghai) pilot Free Trade Zone, Pudong New Area, Shanghai, 201206 Patentee after: Shanghai Pudong Construction Co.,Ltd. Patentee after: SHANGHAI PUDONG ROAD & BRIDGE ASPHALT-BASED MATERIAL Co.,Ltd. Patentee after: SHANGHAI HUANBAO RESIDUE INDUSTRY DISPOSAL Co.,Ltd. Address before: 200122 Shanghai city Pudong New Area Jialin Road No. 1028 Patentee before: SHANGHAI PUDONG ROAD & BRIDGE CONSTRUCTION Co.,Ltd. Patentee before: SHANGHAI PUDONG ROAD & BRIDGE ASPHALT-BASED MATERIAL Co.,Ltd. Patentee before: SHANGHAI HUANBAO RESIDUE INDUSTRY DISPOSAL Co.,Ltd. |