CN109631031A - Asphalt mixture machine combustion system - Google Patents
Asphalt mixture machine combustion system Download PDFInfo
- Publication number
- CN109631031A CN109631031A CN201811495605.7A CN201811495605A CN109631031A CN 109631031 A CN109631031 A CN 109631031A CN 201811495605 A CN201811495605 A CN 201811495605A CN 109631031 A CN109631031 A CN 109631031A
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- CN
- China
- Prior art keywords
- expansion link
- combustion
- roller
- fuel
- asphalt mixture
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D11/00—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D11/00—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space
- F23D11/36—Details, e.g. burner cooling means, noise reduction means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D11/00—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space
- F23D11/36—Details, e.g. burner cooling means, noise reduction means
- F23D11/44—Preheating devices; Vaporising devices
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Combustion Of Fluid Fuel (AREA)
Abstract
The invention discloses a kind of asphalt mixture machine combustion systems, including roller, combustion chamber, fuel delivery means, combustion-supporting gas conveying device and igniter, it is characterized by: the combustion chamber is cylindrical in shape, end is connected with expansion link, the expansion link protrudes into drums inside from the feed end of roller and end is in horn-like；The fireguard that can be slided along the axis direction of expansion link is arranged on the combustion chamber or expansion link, the feed end of roller is arranged in the fireguard.For the strong harm of radiant heat when solving to burn coal tar, burner malfunctions are reduced, combustion chamber is lengthened, allows flame to stretch to roller deeper inside, reduce radiant heat to the paint baking over of burner components and roller feed opening.And ensure that a large amount of radiant heat of generation are more absorbed by building stones, rather than roasting plant or outer escape, sufficient heat absorption reduce the oil consumption of fuel.
Description
Technical field
The present invention relates to technical field of road construction, and in particular to asphalt mixture machine combustion system.
Background technique
External oil product is the heavy oil of standard, and a large amount of radiant heat will not be generated in burning, and domestic heavy oil is most of
It cannot be according to foreign countries for the burner having in capable of burning for the standard heavy oil that the non-petroleum such as coal tar, rubber oil are refined
Technical parameter debugs this burner, needs to make improvements upgrading.For coal tar, calorific value is high, and the radiant heat of generation is strong,
And the combustion chamber of burner is short, a large amount of radiant heat is easy to flame-isolating board, flame detector, pyrosphere, fire near combustion chamber
Flame conical ring bake it is bad, it is frequent to replace burner components, also result in burner malfunctions and take place frequently.The combustion chamber of standard and roller blanking
Mouth distance is close, also often burns out roller feed opening, it is often necessary to maintenance feed opening, so a kind of combustion for being able to solve the above problem
Burner is even more important.
Summary of the invention
The purpose of the present invention is to provide a kind of asphalt mixture machine combustion system, solve in the prior art, burner
The problem of combustion chamber is too short, and the part when calorific value of fuel is excessively high near combustion chamber is easily damaged.
In order to solve the above technical problems, the invention adopts the following technical scheme:
A kind of asphalt mixture machine combustion system, including roller, combustion chamber, fuel delivery means, combustion-supporting gas conveying device and point
Fiery device, it is characterised in that: the combustion chamber is cylindrical in shape, end is connected with expansion link, feed end of the expansion link from roller
It protrudes into drums inside and end is in horn-like；
The fireguard that can be slided along the axis direction of expansion link is arranged on the combustion chamber or expansion link, the fireguard is set
Set the feed end in roller.
Burner in the prior art can be used in burner in the application, and combustion chamber, fuel are defeated if not illustrating
Send device, combustion-supporting gas conveying device and igniter identical as used in the prior art.The application's focuses on burning
The end of room increases expansion link, to extend the length of combustion chamber, with combustor external heat, reduces thermal loss；Expansion link
End in horn-like, be conducive to heat and be adequately diffused into roller, improve the utilization efficiency of heat.
The design of fireguard so that open burning it is scalable be it is semi-enclosed, radiant heat is kept off in drums inside, is not easy
Toward external cooling；Blanking groove is not in overheating deforming in roller, and loading head end face does not overheat；Original air inflow is not influenced, is protected
Full combustion is demonstrate,proved, flame is bright；The noise that flame combustion generates when reducing production；Baffle can according to different rollers diameter and
Internal baiting structure is designed, and is to match more rationally, more convenient to use.
Preferably, the combustion chamber and expansion link are detachably connected or are integrally formed.
If being transformed on existing combustion chamber, then it can be removably connected with expansion link, if directly producing,
Then can be with the connection type of unrestricted choice combustion chamber and connecting cylinder, in general, dismountable connection type has more universality,
But may be inconvenient when using, it is easily damaged, the adaptability of integral type is relatively poor, but uses relatively convenient.
Preferably, the expansion link and roller are coaxially disposed, and the feed inlet of the roller is located at expansion link outlet
Close to the side of roller feed end, the protective cover for preventing charging damage expansion link, the protection are provided with above the expansion link
Cover is fixedly mounted in expansion link.
After expansion link is extend into roller, when charging, may be pounded in expansion link, cause the damage of expansion link, so
Protective cover is set in expansion link, protects expansion link, avoids feeding the damage to expansion link.
Preferably, it is that combustion-supporting gas is defeated that the side wall of the expansion link and combustion chamber, which includes among inside and outside two layers, two layers,
Send chamber, the combustion-supporting gas conveyor chamber be provided with close to expansion link end help fuel gas inlet, one end far from expansion link end with
Combustion chamber connection.
Be provided with combustion-supporting gas conveyor chamber on the side wall of expansion link and combustion chamber, combustion-supporting gas when by combustion-supporting gas conveyor chamber,
The heat that can be absorbed in combustion-supporting gas conveying cavity wall plays the effect of preheating, the combustion-supporting gas of warm so that the temperature of itself increases
It is easier to burn after mixing with fuel, efficiency of combustion is higher.On the other hand, the heat in the combustion-supporting gas conveying cavity wall of combustion-supporting aspiration
Amount can also reduce the temperature of combustion chamber and expansion link, reduce heat radiation, reduce thermal loss, improve the utilization efficiency of heat
While, it reduces components nearby and deforms due to by heat radiation the probability of damage.
Preferably, combustion-supporting gas conveyor chamber is connected to by gas cylinder with combustion chamber, the fuel delivery means packet
Fuel atomizer is included, the fuel atomizer outlet is located in gas cylinder.
Fuel leaves gas cylinder by the drive of combustion-supporting gas after atomization and enters combustion chamber.
Preferably, the fuel atomizer is connected to by material delivery pipe with the discharge port of heavy oil storage tank, it is described heavy
The discharge port of oil tank is located at the bottom end of heavy oil storage tank, and along the direction of fuel flowing, the height of the delivery pipe is gradually decreased,
Heavy oil basis is increased general 1.5 meters, guarantees that heavy oil is full of oil pump always.
Preferably, the igniter is located at the outlet end of gas cylinder.By gas cylinder, fuel and combustion-supporting gas are carried out
Preliminary mixing, igniter light a fire to the mixture of fuel and combustion-supporting gas.
Preferably, described help fuel gas inlet there are two more than, two or more helps fuel gas inlet circumferentially uniformly to divide
Cloth is on combustion-supporting gas conveyor chamber, and each combustion-supporting gas inlet is provided with air-introduced machine.
Help fuel gas inlet evenly dispersed, the uniform heat absorbed on combustion chamber and expansion link side wall is uniform to reduce combustion
Burn room and the outside heat radiation of expansion link, prevent heat to be unevenly distributed, hot-spot or supercooling the case where.
Preferably, the inlet of the gas cylinder is provided with more than two inlet channels around gas cylinder, it is described into
Gas channel and the tangent setting of inflator so that combustion-supporting gas is tangentially into gas-guide tube, gas-guide tube inside spin forward, sprayed with atomizer
Fuel out uniformly can be mixed adequately, then have igniter to light a fire, high combustion efficiency.
Preferably, the roller is provided with discharge port far from one end of feed end, tail gas is additionally provided in discharge outlet
Collection device, the tail gas collecting device are connected with aeration tower by exhaust pipe, will discharge after vent gas treatment, reduce to air
Pollution.
Compared with prior art, beneficial effects of the present invention are at least one of following:
For the strong harm of radiant heat when solving to burn coal tar, burner malfunctions are reduced, combustion chamber is lengthened, flame is allowed to stretch to
Roller deeper inside reduces radiant heat to the paint baking over of burner components and roller feed opening.By on-the-spot test, not plus
When long combustion chamber, the temperature of the burners components such as flame-isolating board has reached 250 DEG C or more, and when the test of improved same location
Temperature only has 90 DEG C or so, and effect is clearly.And ensure that a large amount of radiant heat of generation are more absorbed by building stones, without
It is roasting plant or outer escape, sufficient heat absorption reduces the oil consumption of fuel.
Fireguard is set, so that open burning is scalable to be semi-enclosed, radiant heat is kept off in drums inside, is not easy past
External cooling.
Combustion-supporting gas conveyor chamber is set, thermal loss is on the one hand reduced, on the other hand to help gas-preheating, improves burning effect
Rate.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention.
Fig. 2 is the structural schematic diagram of combustion chamber of the present invention and expansion link.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
Embodiment 1:
Present embodiment discloses a kind of asphalt mixture machine combustion systems, as shown in Figure 1, defeated including roller 7, combustion chamber 1, fuel
Send device, combustion-supporting gas conveying device and igniter, it is characterised in that: the combustion chamber 1 is cylindrical in shape, end is connected with expansion link
2, the expansion link 2 protrudes into drums inside from the feed end of roller and end is in horn-like；
The fireguard 6 that can be slided along the axis direction of expansion link 2, the gear fire are arranged on the combustion chamber 1 or expansion link 2
The feed end of roller 7 is arranged in plate 6.
Burner in the prior art can be used in burner in the application, and combustion chamber, fuel are defeated if not illustrating
Send device, combustion-supporting gas conveying device and igniter identical as used in the prior art.The application's focuses on burning
The end of room increases expansion link, to extend the length of combustion chamber, with combustor external heat, reduces thermal loss；Expansion link
End in horn-like, be conducive to heat and be adequately diffused into roller, improve the utilization efficiency of heat.
The design of fireguard so that open burning it is scalable be it is semi-enclosed, radiant heat is kept off in drums inside, is not easy
Toward external cooling；Blanking groove is not in overheating deforming in roller, and loading head end face does not overheat；Original air inflow is not influenced, is protected
Full combustion is demonstrate,proved, flame is bright；The noise that flame combustion generates when reducing production；Baffle can according to different rollers diameter and
Internal baiting structure is designed, and is to match more rationally, more convenient to use.Fireguard can slide, sliding type
Can be used it is in the prior art any one, such as sliding block and sliding rail etc., as long as can slide.
Embodiment 2:
The present embodiment on the basis of embodiment 1, further defines: the combustion chamber 1 and expansion link 2 are detachably connected or one
It is body formed.
If being transformed on existing combustion chamber 1, then it can be removably connected with expansion link 2, if directly raw
It produces, then can be with the connection type of unrestricted choice combustion chamber 1 and connecting cylinder, in general, dismountable connection type is with more general
Adaptive, but may be inconvenient when use, it is easily damaged, the adaptability of integral type is relatively poor, but uses relatively convenient.
Embodiment 3:
The present embodiment on the basis of embodiment 1, further defines: the expansion link 2 is coaxially disposed with roller 7, and described
The feed inlet of roller 7 is located at expansion link 2 and exports side close to 7 feed end of roller, be provided with above the expansion link 2 prevent into
The protective cover of material damage expansion link 2, the protective cover are fixedly mounted in expansion link 2.
After expansion link is extend into roller, when charging, may be pounded in expansion link, cause the damage of expansion link, so
Protective cover is set in expansion link, protects expansion link, avoids feeding the damage to expansion link.
Embodiment 4:
The present embodiment on the basis of embodiment 1, further defines: as shown in Fig. 2, the side of the expansion link 2 and combustion chamber 1
Wall includes two layers inside and outside, is combustion-supporting gas conveyor chamber 3 among two layers, and the combustion-supporting gas conveyor chamber 3 is set close to 2 end of expansion link
Be equipped with help fuel gas inlet 31, far from 2 end of expansion link one end and combustion chamber 1 inside be connected to.
Combustion-supporting gas conveyor chamber 3 is provided on the side wall of expansion link 2 and combustion chamber 1, combustion-supporting gas is passing through combustion-supporting gas conveyor chamber 3
When, the heat on combustion-supporting 3 wall of gas conveyor chamber can be absorbed, so that the temperature of itself increases, play the effect of preheating, warm helps
Combustion gas is easier to burn after mixing with fuel, and efficiency of combustion is higher.On the other hand, on combustion-supporting 3 wall of gas conveyor chamber of combustion-supporting aspiration
Heat, can also reduce the temperature of combustion chamber 1 and expansion link 2, reduce heat radiation, reduce thermal loss, improve the benefit of heat
While with efficiency, reduces components nearby and deform due to by heat radiation the probability of damage.
Embodiment 5:
The present embodiment further defines on the basis of embodiment 4: combustion-supporting gas conveyor chamber 3 passes through gas cylinder 4 and combustion chamber 1
Inside connection, the fuel delivery means include fuel atomizer 5, and the outlet of fuel atomizer 5 is located in gas cylinder 4.
Fuel leaves gas cylinder 4 by the drive of combustion-supporting gas after atomization and enters combustion chamber 1.
Embodiment 6:
The present embodiment further defines on the basis of embodiment 5: the fuel atomizer 5 is by material delivery pipe and again
The discharge port of oil tank is connected to, and the discharge port of the heavy oil storage tank is located at the bottom end of heavy oil storage tank, and along the direction of fuel flowing,
The height of the delivery pipe gradually decreases, and heavy oil basis is increased general 1.5 meters, guarantees that heavy oil is full of oil pump always.
Embodiment 7:
The present embodiment further defines on the basis of embodiment 5: the igniter is located at the outlet end of gas cylinder 4.Through
Gas cylinder 4 is crossed, fuel and combustion-supporting gas have carried out preliminary mixing, and igniter carries out a little the mixture of fuel and combustion-supporting gas
Fire.
Embodiment 8:
The present embodiment further defines on the basis of embodiment 4: it is described help fuel gas inlet 31 there are two more than, two with
On help fuel gas inlet 31 to be circumferentially evenly distributed on combustion-supporting gas conveyor chamber 3, and each help at fuel gas inlet 31 and be provided with
Air-introduced machine.
Help fuel gas inlet 31 evenly dispersed, the uniform heat absorbed on combustion chamber 1 and 2 side wall of expansion link is uniform to drop
Low combustion chamber 1 and the outside heat radiation of expansion link 2, prevent heat to be unevenly distributed, hot-spot or supercooling the case where.
Embodiment 9:
The present embodiment further defines on the basis of embodiment 5: the inlet of the gas cylinder 4 is arranged around gas cylinder 4
There are two the above inlet channel 41, the inlet channel 41 and the tangent setting of inflator, so that combustion-supporting gas is tangentially into gas-guide tube,
Gas-guide tube inside spin forward, with atomizer 5 spray fuel uniformly can adequately mix, then there is igniter to carry out a little
Fire, high combustion efficiency.
Embodiment 10:
The present embodiment on the basis of embodiment 1, further defines: the roller 7 is provided with out far from one end of feed end
Material mouth is additionally provided with tail gas collecting device in discharge outlet, and the tail gas collecting device is connected with aeration tower by exhaust pipe, will
It is discharged after vent gas treatment, reduces the pollution to air.
Although reference be made herein to invention has been described for multiple explanatory embodiments of the invention, however, it is to be understood that
Those skilled in the art can be designed that a lot of other modification and implementations, these modifications and implementations will fall in this Shen
It please be within disclosed scope and spirit.More specifically, disclose in the application, drawings and claims in the range of, can
With the building block and/or a variety of variations and modifications of layout progress to theme combination layout.In addition to building block and/or layout
Outside the modification and improvement of progress, to those skilled in the art, other purposes also be will be apparent.
Claims (10)
1. a kind of asphalt mixture machine combustion system, including roller (7), combustion chamber (1), fuel delivery means, help fuel gas transmission
Device and igniter, it is characterised in that: the combustion chamber (1) is cylindrical in shape, end is connected with expansion link (2), the expansion link
(2) drums inside is protruded into from the feed end of roller and end is in horn-like；
The fireguard (6) that can be slided along the axis direction of expansion link (2) is arranged on the combustion chamber (1) or expansion link (2),
Feed end of fireguard (6) setting in roller (7).
2. asphalt mixture machine combustion system according to claim 1, which is characterized in that the combustion chamber (1) and lengthening
Cylinder (2) is detachably connected or is integrally formed.
3. asphalt mixture machine combustion system according to claim 1, which is characterized in that the expansion link (2) and roller
(7) it is coaxially disposed, and the feed inlet of the roller (7) is located at expansion link (2) and exports close to the side of roller (7) feed end, institute
The protective cover for being provided with above expansion link (2) and preventing charging damage expansion link (2) is stated, the protective cover is fixedly mounted on expansion link
(2) on.
4. asphalt mixture machine combustion system according to claim 1, which is characterized in that the expansion link (2) and burning
The side wall of room (1) includes two layers inside and outside, is combustion-supporting gas conveyor chamber (3) among two layers, the combustion-supporting gas conveyor chamber (3) close to plus
Long cylinder (2) end, which is provided with, helps fuel gas inlet (31), one end far from expansion link (2) end and combustion chamber (1) inside to be connected to.
5. asphalt mixture machine combustion system according to claim 4, which is characterized in that the combustion-supporting gas conveyor chamber (3)
By being connected to inside gas cylinder (4) and combustion chamber (1), the fuel delivery means include fuel atomizer (5), the fuel fog
Change device (5) outlet to be located in gas cylinder (4).
6. asphalt mixture machine combustion system according to claim 5, which is characterized in that the fuel atomizer (5) is logical
Material delivery pipe to be crossed to be connected to the discharge port of heavy oil storage tank, the discharge port of the heavy oil storage tank is located at the bottom end of heavy oil storage tank, and
Along the direction of fuel flowing, the height of the delivery pipe is gradually decreased.
7. asphalt mixture machine combustion system according to claim 5, which is characterized in that the igniter is located at air guide
The outlet end of cylinder (4).
8. asphalt mixture machine combustion system according to claim 4, which is characterized in that described that fuel gas inlet (31) is helped to have
Two or more, two or more help fuel gas inlet (31) to be circumferentially evenly distributed on combustion-supporting gas conveyor chamber (3), and each combustion-supporting
Gas entrance is provided with air-introduced machine at (31).
9. asphalt mixture machine combustion system according to claim 5, which is characterized in that the entrance of the gas cylinder (4)
Place is provided with more than two inlet channels (41) around gas cylinder (4), the inlet channel (41) and the tangent setting of inflator.
10. asphalt mixture machine combustion system according to claim 1, which is characterized in that the roller (7) is far from charging
The one end at end is provided with discharge port, is additionally provided with tail gas collecting device in discharge outlet, the tail gas collecting device passes through offgas duct
Road is connected with aeration tower.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811495605.7A CN109631031A (en) | 2018-12-07 | 2018-12-07 | Asphalt mixture machine combustion system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811495605.7A CN109631031A (en) | 2018-12-07 | 2018-12-07 | Asphalt mixture machine combustion system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109631031A true CN109631031A (en) | 2019-04-16 |
Family
ID=66072003
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811495605.7A Pending CN109631031A (en) | 2018-12-07 | 2018-12-07 | Asphalt mixture machine combustion system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109631031A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111847952A (en) * | 2020-06-12 | 2020-10-30 | 福建省铁拓机械股份有限公司 | Composite drying roller with telescopic combustion chamber for heating RAP and aggregate |
Citations (8)
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| CN2123004U (en) * | 1992-05-19 | 1992-11-25 | 黄邦国 | High-efficiency multifunctional burner |
| KR19980052508A (en) * | 1996-12-24 | 1998-09-25 | 구이회 | Cold Aggregate Heating Apparatus Adopting Steam Switching Heated Complete Combustion Dryer Burner |
| CN2660322Y (en) * | 2003-11-10 | 2004-12-01 | 田红 | Regulating oil atomizer gun with fire baffle disk |
| CN201688402U (en) * | 2010-06-08 | 2010-12-29 | 华南理工大学 | Heat regeneration type liquid fuel miniature combustor |
| CN105805749A (en) * | 2016-05-04 | 2016-07-27 | 福建铁拓机械有限公司 | Pitch aggregate drying and heating combustor and combustor air supplying and cooling method |
| CN205775722U (en) * | 2016-05-20 | 2016-12-07 | 中交第一航务工程局有限公司 | A kind of asphalt mixing plant coal-fired heating furnace apparatus |
| CN206570648U (en) * | 2017-03-03 | 2017-10-20 | 吉林省嘉鹏集团有限公司 | A kind of asphalt-regenerating mixing station recycling device for hot air |
| JP2018194236A (en) * | 2017-05-18 | 2018-12-06 | 日工株式会社 | Burner |
-
2018
- 2018-12-07 CN CN201811495605.7A patent/CN109631031A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2123004U (en) * | 1992-05-19 | 1992-11-25 | 黄邦国 | High-efficiency multifunctional burner |
| KR19980052508A (en) * | 1996-12-24 | 1998-09-25 | 구이회 | Cold Aggregate Heating Apparatus Adopting Steam Switching Heated Complete Combustion Dryer Burner |
| CN2660322Y (en) * | 2003-11-10 | 2004-12-01 | 田红 | Regulating oil atomizer gun with fire baffle disk |
| CN201688402U (en) * | 2010-06-08 | 2010-12-29 | 华南理工大学 | Heat regeneration type liquid fuel miniature combustor |
| CN105805749A (en) * | 2016-05-04 | 2016-07-27 | 福建铁拓机械有限公司 | Pitch aggregate drying and heating combustor and combustor air supplying and cooling method |
| CN205775722U (en) * | 2016-05-20 | 2016-12-07 | 中交第一航务工程局有限公司 | A kind of asphalt mixing plant coal-fired heating furnace apparatus |
| CN206570648U (en) * | 2017-03-03 | 2017-10-20 | 吉林省嘉鹏集团有限公司 | A kind of asphalt-regenerating mixing station recycling device for hot air |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111847952A (en) * | 2020-06-12 | 2020-10-30 | 福建省铁拓机械股份有限公司 | Composite drying roller with telescopic combustion chamber for heating RAP and aggregate |
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Application publication date: 20190416 |