CN106012762B - Based on vertical heating and tail gas recycle combustion-supporting asphalt pavement material renovation process and device - Google Patents
Based on vertical heating and tail gas recycle combustion-supporting asphalt pavement material renovation process and device Download PDFInfo
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- CN106012762B CN106012762B CN201610501744.0A CN201610501744A CN106012762B CN 106012762 B CN106012762 B CN 106012762B CN 201610501744 A CN201610501744 A CN 201610501744A CN 106012762 B CN106012762 B CN 106012762B
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- drying oven
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
- E01C19/02—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for preparing the materials
- E01C19/10—Apparatus or plants for premixing or precoating aggregate or fillers with non-hydraulic binders, e.g. with bitumen, with resins, i.e. producing mixtures or coating aggregates otherwise than by penetrating or surface dressing; Apparatus for premixing non-hydraulic mixtures prior to placing or for reconditioning salvaged non-hydraulic compositions
- E01C19/1004—Reconditioning or reprocessing bituminous mixtures, e.g. salvaged paving, fresh patching mixtures grown unserviceable; Recycling salvaged bituminous mixtures; Apparatus for the in-plant recycling thereof
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- Road Paving Machines (AREA)
Abstract
The invention discloses a kind of based on vertical heating and tail gas recycle combustion-supporting asphalt pavement material renovation process and regenerating unit, it is arranged side by side for the old material drying oven of heating recovery ground surface material and the mineral aggregate drying oven for heating new mineral aggregate, connection air door is set to connect two drying ovens, and pass through oil gas drainage tube and connect old material drying oven with the burner on mineral aggregate drying oven, while the hot gas that burner generates enters mineral aggregate drying stove heat new mineral aggregate, heating recovery ground surface material in old material drying oven is imported by connecting air door, the oil gas of discharge is sent into burner through oil gas drainage tube again, with one combust of fuel oil of external world's supply, hot gas is generated to enter in mineral aggregate drying oven, such iterative cycles.Inventive process avoids contacted directly in reclaimed materials heating process with burner flame, hence it is evident that reduces the quality aging of reclaimed materials, improves the reproduction quality of reclaimed materials；The flammable tail gas recycle generated in reclaimed materials heating process is reduced operating cost, decreases noxious gas emission, had received energy saving and environmentally friendly double effects using the supply for reducing fuel again.
Description
Technical field
The invention belongs to asphalt pavement material technical field of regeneration, and in particular to a kind of recovery and reusing and recycling asphalt road plane materiel
The method and apparatus of material.
Background technology
In the pavement structure of domestic and international advanced road, bituminous paving accounts for the overwhelming majority.Annual road upkeep and upgrading change
Make the old pavement material formed in engineering increases year by year, and is limited to regeneration technology and its hysteresis of special equipment, these are old at present
Material is seldom for the quantity of regeneration.This not only causes a large amount of wastes of useful materials, while it is abandoned and storage is made again
Into serious environmental pollution.
The regeneration of asphalt pavement material is by old pavement cutout（Milling）Gathering materials for recycling afterwards carries out material with reasonable process
Regenerated process.Typically by old material together with new gather materials mix, formed and new meet the new of associated specifications requirement
Asphalt concrete material is used for laying of roadway, so as to complete the regenerated overall process of asphalt pavement material.
It is many that the regenerative process of ground surface material is related to factor, but for a long time, due to unsuitable heater means, road surface
Material is always the mix process that new material is directly participated in normal temperature state, and the promotion of temperature is completely dependent on carrying out with new material
Heat exchange obtains, but this heat exchanging process needs to carry out in the mix process for having completed after drying heating in new material again（I.e.
There is no new heat supplement in heat exchanging process）.In order to reach new, the mixed drop temperature of old material（Modified pitch mixes
The drop temperature scope of material is 165~175 DEG C）, the additional proportion of old material is very low, is usually strictly limited below 15%.
Obviously, obvious shortcoming is stated in the presence of the feed postition of this room temperature material：The additional proportion of old material is relatively low, hence it is evident that
Limit the regeneration efficiency of material；Since the mix cycle of mixture is shorter（Generally≤60s）So that newly with material and other materials
Material is difficult to realize more sufficiently mix, and the quality of regeneration new material is made to be affected.
But the above problem by simply being promoted nor dry what furnace temperature can solve.If arbitrarily improve drying oven
Temperature, and can be completely melt the pitch on reworked material, adhesion is caused to the furnace wall of drying oven and prevents it from normally producing；
Meanwhile higher temperature easily causes the aging of old material and influences the road quality of regrown material.
In addition, making a general survey of current domestic and international correlative technology field, people simply will in the regenerative process of asphalt pavement material
Ground surface material is used as a kind of " reclaimed materials ", is not recognized that under certain condition, waste asphalt pavement material exists
The exhaust gas generated in regenerative process can also be used as the drying and heating that " fuel " participates in material.
The content of the invention
The object of the present invention is to provide a kind of based on vertical heating and the combustion-supporting asphalt pavement material regeneration side of tail gas recycle
Method, to realize the high-effect high-quality regeneration of asphalt pavement material.
A kind of regenerating unit for being suitable for above-mentioned asphalt pavement material renovation process is provided, is another invention mesh of the present invention
's.
Asphalt pavement material renovation process of the present invention is at CN 104195920A " a kind of vertical mineral aggregate dryer "
Theoretical foundation on carry out, being mainly characterized by of the mineral aggregate dryer utilizes heating flame（Heat）The natural rule upwardly propagated
Rule completes the heat exchange of heat and heated material, and heating container is in the upright fixed operation state of vertical（It is and unconventional
Horizontal rotary operation）, this is just to create condition using the bypass heating regeneration old material in mineral aggregate drying course, is also road surface material
Old material is first heated into the ground surface material with certain temperature in material regenerative process, i.e., mixing and stirring completion with " hot material " participation regenerated
Journey has established technical foundation.
Asphalt pavement material renovation process of the present invention into two vertical mineral aggregates being arranged side by side by drying
Stove --- for the old material drying oven of heating recovery ground surface material, for heating the mineral aggregate drying oven of new mineral aggregate --- to realize
, the present invention connects burner on the furnace body of mineral aggregate drying oven, for being passed through hot gas into mineral aggregate drying oven, and in two bakings
Connection air door is set between dry stove, and for two drying ovens to be connected, the induced duct on old material drying oven is drawn by an oil gas
Flow tube connects on the burner, and the hot gas that burner generates is passed through the new mineral aggregate of heating in mineral aggregate drying oven, while by connecting wind
Door is imported in old material drying oven for the recycling ground surface material in heating furnace, recycles the oil gas discharged in ground surface material drying course
Old material drying oven is drawn by induced duct, it is combustion-supporting via oil gas drainage tube feeding burner, it generates hot gas and enters mineral aggregate drying oven
The middle new mineral aggregate of heating, such iterative cycles.
Recycling ground surface material in old material drying oven is heated during top-down fall by hot gas, passes through old material
Discharge port discharges old material drying oven, is delivered to mixer, with the new mineral aggregate of mineral aggregate drying oven discharge and the both on fresh bitumen of addition
Uniform mixing in proportion becomes new asphalt.
Wherein, the present invention is also provided with the heating air duct specially designed in one side lower part of old material drying oven of connection air door,
The heating air duct is extended downwardly into old material drying oven, and the hot gas from mineral aggregate drying oven is made first to reach down to old material drying oven
Bottom after, then turn back upwards, from bottom to top heat old material drying oven in recycling ground surface material.
Further, the present invention is also both provided with flow distribution plate in the old material drying oven and mineral aggregate drying oven, described time
It receives ground surface material and new mineral aggregate at the top of respective drying oven to enter in stove, be fallen by the shunting of flow distribution plate gradual rolloff, by stove
Interior hot gas heating, drying.
It is described and then the present invention also provides a kind of regenerating unit for being suitable for above-mentioned asphalt pavement material renovation process
Device includes：
One mineral aggregate drying oven is provided with mineral aggregate feed inlet above the mineral aggregate drying oven, and lower section is provided with mineral aggregate
Discharge port, the top of the mineral aggregate drying oven set the first air door, are connected by the first air inducing pipeline with the first air-introduced machine,
Flow distribution plate is provided in the furnace body of the mineral aggregate drying oven；
One old material drying oven is disposed side by side on the one side of the mineral aggregate drying oven, in the top of the old material drying oven
Old material feed inlet is provided with, lower section is provided with old material discharge port, and the top of the old material drying oven sets the second air door, passes through
Second air inducing pipeline is connected with the second air-introduced machine, and flow distribution plate is provided in the furnace body of the old material drying oven；
One burner is connected to the lower portion of furnace body of mineral aggregate drying oven, for generating and being passed through heat into mineral aggregate drying oven
Gas；
One connection air door, is arranged on old material drying oven and the furnace body of mineral aggregate drying oven junction, for connecting old material
The furnace body of drying oven and mineral aggregate drying oven is connected with heating air duct on the connection air door, and the heating air duct is arranged on old
Expect the lower part of drying oven, Open Side Down；
One oil gas drainage tube, its one end are connected on the second air-introduced machine, and the other end is connected with burner.
Further, described device further includes the first dust-extraction unit on the first air inducing pipeline and mounted on second
The second dust-extraction unit on air inducing pipeline.
In regenerating unit of the present invention, the installation site of the connection air door is higher than the installation site of burner.
Further, regenerating unit of the present invention is being connected between air door installation site and burner installation site extremely
One piece of flow distribution plate is provided with less, can so ensure that the flame that burner generates will not enter in old material drying oven.
Easily there is the aging of material, therefore, pitch at high operating temperatures as a kind of polymer organic matter in pitch
Basal plane radiation temperature is heated preferably 400~600 DEG C.Asphalt pavement material renovation process and device using the present invention, pass through
Connection air door and heating air duct enter the initial temperature of the hot gas of old material drying oven（Compared with the radiation temperature of heated substrate）
During the continuous normal operation of burner, the optimization temperature value at 450~480 DEG C, substantially conforming to pitch heating, the present invention can be stablized
The regenerating unit of design uses indirectly heat, can effectively evade common flame at present and directly heat method（Its heated substrate
Radiation temperature is up to 1200 DEG C or more）High temperature, this for reduce asphalt pavement material regenerative process in secondary aging, keep
The road of pitch is especially important with index.
As the final products of petroleum refining, the chemical composition of pitch is complex, but is mainly hydrogenated by macromolecule carbon
The mixture of object and nonhydrocarbon composition is closed, and these substances are essentially all the combustible with higher thermal value.Drip
The gas for being precipitated and volatilizing in blue or green ground surface material regenerative process is this fuel gas caused by lightweight oil in pitch is heated
Calorific value and heavy oil or diesel oil gasification after calorific value it is substantially similar.Therefore, the tail gas recycle being precipitated when ground surface material is heated is made
It is passed through for " fuel " in burner for combustion-supporting, can substantially save heating fuel, effectively reduce engineering cost, and be greatly decreased
The discharge of harmful exhaust.Through carrying out thermal equilibrium analysis and entity project practical proof to the combustion-supporting thermal efficiency of tail gas, in road surface material
Mixture proportion is expected for the saving of fuel 5~8% of burner under 30% and the operating condition of water content≤1.5%, can be made, it is corresponding useless
Gas exhaust emission reduces more than 10%, and the overall economic efficiency of material regeneration improves 12~15%.Meanwhile compared to traditional work
Skill, the use of new process significantly improve the reproduction quality and regeneration efficiency of ground surface material.
The rising tail gas recycle being precipitated when the present invention is by the way that asphalt pavement material is heated, which is used as, heats combustion-supporting " fuel ",
The utilization ratio of old material is greatly improved so that the mixture proportion of road surface old material is by current less than 15% in regenerative process
More than 30% is increased to, also by the regeneration efficiency of current ground surface material（Amount of regeneration）It is more than doubled.
Regeneration methods of the invention and regenerating unit heat waste asphalt concrete using drying oven hot gas, make regeneration old material
Lose open fire, non-aging, and the non-sticky stove of old material, do not block, the reproduction quality of old material can be effectively improved.Meanwhile old material is again
The utilization of the raw combustible oil gas generated in the process effectively reduces the exhaust emission of regeneration cost and pernicious gas.
Device of the present invention can also be widely used in the water removal, heating and baking of various mineral aggregates and other bulk materials
It is dry.
Description of the drawings
Fig. 1 is the structure diagram of asphalt pavement material regenerating unit of the present invention.
Specific embodiment
Following embodiments are only the preferred technical solution of the present invention, are not used to carry out any restrictions to the present invention.For
For those skilled in the art, the invention may be variously modified and varied.Within the spirit and principles of the invention, made
Any modification, equivalent substitution, improvement and etc., should all be included in the protection scope of the present invention.
The structure of asphalt pavement material regenerating unit by mineral aggregate drying oven 4 with mineral aggregate is disposed side by side on as shown in Figure 1, dried
The old material drying oven 14 of stove one side forms, and for mineral aggregate drying oven for heating new mineral aggregate, old material drying oven is used for heating recovery road
Plane materiel material.
Mineral aggregate feed inlet 2 is provided in the top of mineral aggregate drying oven 4, lower section is provided with mineral aggregate discharge port 10, mineral aggregate drying
The top of stove sets the first air door 1, is connected by the first air inducing pipeline 3 with the first air-introduced machine 8, and on the first air inducing pipeline 3
First dust-extraction unit 5 is installed, flow distribution plate 13 is provided in the furnace body of mineral aggregate drying oven, is also pacified on the furnace body of mineral aggregate drying oven
Hot gas is generated equipped with burner 7, after the fuel oils such as 7 combusting heavy oil of burner and is passed through the new mineral aggregate of heating in mineral aggregate drying oven.
Old material feed inlet 17 is provided in the top of old material drying oven 14, lower section is provided with old material discharge port 11, and old material is dried
The top of dry stove sets the second air door 18, is connected by the second air inducing pipeline 19 with the second air-introduced machine 12, and in the second induced duct
Second dust-extraction unit 16 on road 19 is installed, flow distribution plate 13 is again provided in the furnace body of old material drying oven.
It is provided on the furnace body of old material drying oven 14 with 4 junction of mineral aggregate drying oven and is connected air door 6 for two to be dried
Dry stove connection, connects and heating air duct 15 is connected on air door, heating air duct is arranged in old material drying oven, and Open Side Down.Old material is dried
It is connected between the second air inducing pipeline 19 and burner 7 on dry stove 14 by an oil gas drainage tube 9.
During normal production regenerating mixture, the second air door 18 and connection air door 6 are opened, closes the first air door 1.New mineral aggregate from
Mineral aggregate feed inlet 2 above 4 furnace body of mineral aggregate drying oven is sent into stove, is fallen by dead weight through more than 13 shunting of the flow distribution plate in stove,
And the gas heating in stove is passed through after burned device burning.Recycle old material of the ground surface material above 14 furnace body of old material drying oven into
Material mouth 17 is sent into stove, is fallen by dead weight through more than 13 shunting of the flow distribution plate in stove.At this moment, the hot gas at 4 middle part of mineral aggregate drying oven
Enter by the second air-introduced machine 12 from connection air door 6, heating air duct 15 in old material drying oven 14, first reach down to old material drying oven
Bottom, then turn back upwards, heat the recycling ground surface material in old material drying oven from bottom to top, and through old material drying oven 14, the
Two air doors 18 and the second air inducing pipeline 19 are drawn.Recycling ground surface material is heated during shunting is fallen by hot gas, by old
Expect discharge port 11, be elevated machine and be sent into reserving chamber, be transported to mixer in proportion, it is new with the drying that is exported from mineral aggregate discharge port 10
Mineral aggregate and the both on fresh bitumen of addition are mixed and stirred together in mixer, and epidermis pitch is gradually dehydrated, softens, and reach demand temperature, and
As new asphalt.In the process, the oil gas of discharge is sent into burning by oil gas drainage tube 9 in old material drying oven 14
After device 7 burns, generation hot gas, which enters in mineral aggregate drying oven, heats new mineral aggregate, achievees the purpose that save fuel oil.
When not producing regenerating mixture, as long as closing air door connection 6 and the second air door 18, the first air door 1 is opened, then ore deposit
Material drying oven 4 can normally produce new mineral aggregate.
Claims (4)
1. a kind of based on vertical heating and the combustion-supporting asphalt pavement material renovation process of tail gas recycle, the method by setting side by side
The old material drying oven and mineral aggregate drying oven put are realized, are provided with mineral aggregate feed inlet above the mineral aggregate drying oven, lower section is set
Mineral aggregate discharge port is equipped with, the top of the mineral aggregate drying oven sets the first air door, passes through the first air inducing pipeline and the first air inducing
Machine connects, and flow distribution plate is provided in the furnace body of the mineral aggregate drying oven；The old material drying oven is disposed side by side on the mineral aggregate
The one side of drying oven is provided with old material feed inlet above the old material drying oven, and lower section is provided with old material discharge port, described
The top of old material drying oven sets the second air door, is connected by the second air inducing pipeline with the second air-introduced machine, is dried in the old material
Flow distribution plate is provided in the furnace body of dry stove；
One burner is connected to the lower portion of furnace body of mineral aggregate drying oven, for generating and being passed through hot gas into mineral aggregate drying oven；
Connection air door is set on the furnace body of old material drying oven with mineral aggregate drying oven junction for two drying ovens to be connected,
The old material drying oven one side for connecting air door sets heating air duct, and the heating air duct is arranged on the lower part of old material drying oven, is open
Downwards；
One end of one oil gas drainage tube is connected on the second air-introduced machine, and the other end is connected with burner, and the of old material drying oven
Two induced ducts are connected on the burner by oil gas drainage tube；
The hot gas that burner generates is passed through the new mineral aggregate of heating in mineral aggregate drying oven, while imports old material drying oven by connecting air door
In for the recycling ground surface material in heating furnace, recycle the oil gas discharged in ground surface material drying course and drawn by the second induced duct
Go out old material drying oven, via oil gas drainage tube be sent into burner, with the external world supply fuel oil participate in burning together, generate hot gas into
Enter and new mineral aggregate is heated in mineral aggregate drying oven, such iterative cycles.
2. renovation process according to claim 1, it is characterized in that further include on the first air inducing pipeline first removes
Dirt device and the second dust-extraction unit on the second air inducing pipeline.
3. renovation process according to claim 1, it is characterized in that the installation site of the connection air door is higher than burner
Installation site.
4. renovation process according to claim 3, it is characterized in that in connection air door installation site and burner installation site
Between at least provided with one piece of flow distribution plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610501744.0A CN106012762B (en) | 2016-06-30 | 2016-06-30 | Based on vertical heating and tail gas recycle combustion-supporting asphalt pavement material renovation process and device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610501744.0A CN106012762B (en) | 2016-06-30 | 2016-06-30 | Based on vertical heating and tail gas recycle combustion-supporting asphalt pavement material renovation process and device |
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| Publication Number | Publication Date |
|---|---|
| CN106012762A CN106012762A (en) | 2016-10-12 |
| CN106012762B true CN106012762B (en) | 2018-05-18 |
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| CN201610501744.0A Active CN106012762B (en) | 2016-06-30 | 2016-06-30 | Based on vertical heating and tail gas recycle combustion-supporting asphalt pavement material renovation process and device |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109183560B (en) * | 2018-08-08 | 2023-09-22 | 三一汽车制造有限公司 | Tail gas treatment system of asphalt mixture plant-mixing thermal regeneration equipment |
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| CN1380920A (en) * | 2000-05-17 | 2002-11-20 | 株式会社新泻铁工所 | Aggregate dryer for asphalt plant |
| CN202730603U (en) * | 2012-08-20 | 2013-02-13 | 福建铁拓机械有限公司 | Movable stirring apparatus for hot recycling of asphalt concrete |
| CN103703188A (en) * | 2011-04-28 | 2014-04-02 | 依马克制造施工工业及贸易公司 | Hot asphalt preparation system and method for producing a new asphalt layer from the asphalt to be recycled |
| CN203583320U (en) * | 2013-10-23 | 2014-05-07 | 福建铁拓机械有限公司 | Mobile multifunctional forced intermittent asphalt stirring equipment |
| CN104195920A (en) * | 2014-09-10 | 2014-12-10 | 长治县玉通机械设备有限公司 | Vertical type mineral aggregate dryer |
| CN204509958U (en) * | 2015-03-27 | 2015-07-29 | 江苏南北热再生环保材料有限公司 | A kind of bituminous mixture that is applicable to dries the recycling system heated |
| CN205839532U (en) * | 2016-06-30 | 2016-12-28 | 长治县玉通机械设备有限公司 | Based on the asphalt pavement material regenerating unit that vertical heating and tail gas recycle are combustion-supporting |
-
2016
- 2016-06-30 CN CN201610501744.0A patent/CN106012762B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1992001751A1 (en) * | 1990-07-23 | 1992-02-06 | Seppo Aho | A method of processing an asphalt mixture |
| CN1380920A (en) * | 2000-05-17 | 2002-11-20 | 株式会社新泻铁工所 | Aggregate dryer for asphalt plant |
| CN103703188A (en) * | 2011-04-28 | 2014-04-02 | 依马克制造施工工业及贸易公司 | Hot asphalt preparation system and method for producing a new asphalt layer from the asphalt to be recycled |
| CN202730603U (en) * | 2012-08-20 | 2013-02-13 | 福建铁拓机械有限公司 | Movable stirring apparatus for hot recycling of asphalt concrete |
| CN203583320U (en) * | 2013-10-23 | 2014-05-07 | 福建铁拓机械有限公司 | Mobile multifunctional forced intermittent asphalt stirring equipment |
| CN104195920A (en) * | 2014-09-10 | 2014-12-10 | 长治县玉通机械设备有限公司 | Vertical type mineral aggregate dryer |
| CN204509958U (en) * | 2015-03-27 | 2015-07-29 | 江苏南北热再生环保材料有限公司 | A kind of bituminous mixture that is applicable to dries the recycling system heated |
| CN205839532U (en) * | 2016-06-30 | 2016-12-28 | 长治县玉通机械设备有限公司 | Based on the asphalt pavement material regenerating unit that vertical heating and tail gas recycle are combustion-supporting |
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| CN106012762A (en) | 2016-10-12 |
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