CN210621399U - Drying equipment for asphalt mixture regeneration - Google Patents

Abstract

The utility model discloses a drying equipment is used in bituminous mixture regeneration, including primary drying roller and regeneration drying roller, primary drying roller and regeneration drying roller incline respectively and install the upper portion at the main building, the combustor with regeneration drying roller sharing is installed to primary drying roller's lower end, primary drying roller's higher end is relative and be connected with the transition bin between the two with regeneration drying roller's lower end. The utility model discloses the energy saving, green.

Description

Drying equipment for asphalt mixture regeneration

Technical Field

The utility model belongs to the technical field of the bituminous mixture is dry, concretely relates to drying equipment is used in bituminous mixture regeneration.

Background

With the development of Asphalt Pavement engineering in China, most of Asphalt pavements built in traffic vehicles at an early stage enter a major-medium repair stage, and the produced waste Asphalt mixture (RAP) is increasing year by year. As the regeneration technology of the Chinese asphalt pavement is started late and the policy promotion is not large, the regeneration technology is gradually forming at present. At present, the common thermal regeneration technology in China has two application forms: one is in-situ and the other is plant-mixed. The in-situ heat regeneration equipment, also called a regeneration train, is characterized by fast road surface regeneration treatment and little traffic influence, but has the defects of limited road surface thickness (more suitable for preventive maintenance), serious environmental pollution caused by waste gas emitted from the road surface in the heating process and expensive equipment. The plant mixing hot recycling equipment is a fixed asphalt mixture recycling station which can be matched with a stirring station for use. The method has the advantages of high controllability of the quality of finished products, simple operation and lower equipment purchase cost. According to the related data, the plant mixing heat regeneration mode has the highest utilization rate in the global range, is the only mode that the performance of the mixture can be compared with that of a new material in a plurality of regeneration modes, and is the regeneration mode of the Chinese mainstream in China according to the current use condition of China.

As the asphalt highway surface built in the earlier period enters the overhaul maintenance period, a large amount of old asphalt milling materials are generated. Along with the deepening of the energy-saving and environment-friendly concept, the cost can be reduced by using a large amount of recycled asphalt materials, but the cost also means that more maintenance is needed for stirring equipment, and the requirement on the wear resistance is higher. In the past, the mixing equipment mainly carries out hot mixing by adding the primary aggregate, the new powder and the heated asphalt, and as the recycled materials of roads increase, some recycled materials are slowly added to be mixed with the primary aggregate to produce the required asphalt mixture. All traditional stirring equipment in the market adopts double drying rollers, each roller is provided with a burner, and the primary material and the secondary material are respectively heated; it goes without saying that the dual burner operation is energy intensive, resulting not only in a large consumption of fuel and electricity, but also in a high exhaust emission.

SUMMERY OF THE UTILITY MODEL

In view of the deficiencies of the prior art, the utility model aims to provide a drying equipment for asphalt mixture regeneration, it can the energy saving, green.

In order to solve the technical problem, the utility model discloses a technical scheme is: the utility model provides a drying equipment for bituminous mixture regeneration, includes primary drying roller and regeneration drying roller, primary drying roller and regeneration drying roller incline respectively and install the upper portion at the main building, the lower extreme of primary drying roller is installed with the combustor that regeneration drying roller shared, the higher end of primary drying roller is relative and be connected with the transition bin between the two with the lower end of regeneration drying roller.

Preferably, a row of powder partition plates distributed at intervals up and down are arranged in the transition bin, the powder partition plates are fixed in an inclined mode, a hot air inclined through hole is formed between every two adjacent powder partition plates, the lower end of each hot air inclined through hole faces to the original drying roller, and the higher end of each hot air inclined through hole faces to the regeneration drying roller.

Preferably, a material sliding guide plate for guiding the primary material to enter the higher end of the primary drying roller is arranged in the transition bin; the lower part of transition bin is provided with the former middlings dust collection bucket body that is located the higher end below of former drying drum, the lower part of former middlings dust collection bucket body is provided with back whitewashed screw conveyer.

Preferably, the lower portion of the transition bin is provided with two discharging channels located below the lower end of the regenerative drying drum and a regenerative material distribution mechanism for controlling one of the two discharging channels to discharge, the regenerative material distribution mechanism comprises a material distribution plate and a driving mechanism, the lower portion of the material distribution plate is rotatably mounted at the lower portion of the transition bin, two ends of a rotating shaft of the material distribution plate are respectively exposed outside the transition bin, the driving mechanism is mounted on the outer wall of the transition bin, and the driving mechanism drives the material distribution plate to swing so as to switch the two discharging channels.

Preferably, the middle part of the main building is provided with two temporary storage bins for regenerative hot materials, which are correspondingly communicated with the two discharge channels of the transition bin.

Preferably, the top parts of the two temporary storage bins for regenerated hot materials are connected with a regenerant adding device together.

Preferably, the below of primary drying roller is provided with former raw material shale shaker, the lower end bottom discharge gate of former drying roller is connected with the feed inlet of former raw material shale shaker, the below of former raw material shale shaker is provided with former raw material hot bunker, each discharge gate of former raw material shale shaker corresponds with each feed inlet of former raw material hot bunker respectively and is connected.

Preferably, the higher extreme of regeneration drying roller is equipped with the exhaust chamber, the upper portion of exhaust chamber is connected with first return air tobacco pipe, the air outlet of first return air tobacco pipe is connected with the air intake of third draught fan, the air outlet of third draught fan is connected with the air intake of second return air tobacco pipe, the air outlet of second return air tobacco pipe is connected with the lower extreme of primary drying roller and leads to the place ahead of combustor.

Preferably, the upper portion of waste gas chamber is connected with first induced air tobacco pipe, the air outlet of first induced air tobacco pipe is connected with the air intake of first draught fan, the air outlet of first draught fan is connected with the air intake of sack cleaner.

Preferably, the upper portion of transition bin is connected with second induced draft tobacco pipe, the air outlet of second induced draft tobacco pipe is connected with the air intake of second draught fan, the air outlet of second draught fan is connected with the air intake of sack cleaner.

Compared with the prior art, the utility model discloses following beneficial effect has:

the utility model discloses a new generation drying process simplifies the thermal part that produces, and two drying roller sharing combustors use a single combustor to provide and are used for heating the energy of original material in the original drying roller, then according to the mixture that will produce shift the heat that needs to the regeneration drying roller, heat RAP material, energy saving.

The heating value of the RAP material comes from the hot gas drying and heating of the primary drying drum, the use of which avoids the contact between the flame of the burner and the recycled material and the direct radiation of the flame on the RAP material, in such a way that the temperature options in the heating of the recycled material are limited.

The RAP material comes out of the regenerative drying drum with a minimum temperature of 160 ℃, allowing the operation of producing bitumen with up to 100% RAP material, or in any case, mixing various bitumens with a high proportion of RAP material, without overheating the original aggregate, saving energy and maintaining the quality of the residual bitumen contained in the RAP material.

The utility model discloses place two drying drum in main building top, can prevent because any possible adhesion that the material arouses is retrieved in hot recycling to still have the advantage that promotes the material all the time under ambient temperature.

Additionally, the utility model discloses a smoke management system of innovation, all particles and blue smog can all be sent back primary drying drum and introduce at the burner flame back, and this process helps reducing emission and smell by a wide margin, green.

Drawings

Fig. 1 is a partial structural view of an embodiment of the present invention.

Fig. 2 is a structural diagram of the regeneration material distribution mechanism when controlling the opening of a material outlet channel.

Fig. 3 is a structural diagram of the regeneration material distribution mechanism for controlling the opening of another material outlet channel.

Fig. 4 is a side view of a regenerative feed mechanism.

Fig. 5 is a first perspective view of the mixing station according to the embodiment of the present invention.

Fig. 6 is an enlarged upper view of fig. 5.

Fig. 7 is a second perspective view of the mixing station according to the embodiment of the present invention.

Fig. 8 is an enlarged upper view of fig. 7.

Fig. 9 is a third perspective view of the mixing station according to the embodiment of the present invention.

Fig. 10 is an enlarged upper view of fig. 9.

Fig. 11 is an enlarged view of the lower portion of fig. 9.

The labels in the figure are: 1. a primary material bin, 2, a primary aggregate belt conveyor, 3, a primary material hoister, 4, an upper belt conveyor, 5, a transition bin, 6, a primary drying roller, 7, a primary material vibrating screen, 8, a primary material hot bin, 9, a primary material metering hopper, 10, a primary material chute, 11, a stirring cylinder, 12, a finished product bin, 13, a regenerated material bin, 14, a regenerated aggregate belt conveyor, 15, a regenerated material hoister, 16, a regenerated drying roller, 17, a regenerated hot material temporary storage bin, 18, a regenerated material metering hopper, 19, a regenerant adding device, 20, a burner, 21, a cold-supplement material bin, 22, a cold-supplement material belt conveyor, 23, a cold-supplement material hoister, 24, a cold-supplement material temporary storage bin, 25, a cold-supplement material metering hopper, 26, a cold-supplement belt conveyor, 27, a first return air smoke pipe, 28, a recovery spiral conveyor, 29. bag-type dust collector, 30, powder belt conveyor, 31, waste gas chamber, 32, first induced draft fan, 33, second induced draft fan, 34, negative pressure bend pipe, 35, new powder tank, 36, recovered powder tank, 37, powder discharge screw conveyor, 38, humidifier, 39, old powder screw conveyor, 40, recovered powder lifter, 41, recovered powder temporary storage bin, 42, recovered powder screw conveyor, 43, mineral powder measuring hopper, 44, new powder screw conveyor, 45, old powder recovery screw conveyor, 46, asphalt measuring cylinder, 47, third induced draft fan, 48, second air return smoke pipe, 49, second air return smoke pipe, 50, first air return smoke pipe, 51, powder partition board, 52, hot gas inclined through hole, 53, primary dust collecting hopper body, 54, powder return screw conveyor, 55, regeneration distributing mechanism, 56, material sliding guide board, 57, distributing board, 58, driving mechanism, 59, swing arm, 60. cylinder, 61, travel switch.

Detailed Description

In order to make the aforementioned and other features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.

As shown in fig. 1 to 10, the present embodiment provides a drying apparatus for asphalt mixture recycling, which includes a primary drying drum 6 and a secondary drying drum 16, wherein the primary drying drum 6 and the secondary drying drum 16 are respectively installed at the upper part of a main building in an inclined manner, a burner 20 shared by the secondary drying drum 16 is installed at the lower end of the primary drying drum 6, the higher end of the primary drying drum 6 is opposite to the lower end of the secondary drying drum 16, and a transition chamber 5 is connected between the two.

In this embodiment, in order to isolate the raw material from the recycled material and ensure the circulation of hot air, a row of powder partition plates 51 are arranged in the transition bin 5, the powder partition plates 51 are arranged at intervals, the hot air inclined through holes 52 are formed between every two adjacent powder partition plates 51, the lower ends of the hot air inclined through holes 52 face the raw drying roller 6, and the higher ends of the hot air inclined through holes 52 face the recycled drying roller 16.

In this embodiment, in order to facilitate the raw material to enter the primary drying drum 6 quickly and accurately, a material sliding guide plate 56 for guiding the raw material to enter the higher end of the primary drying drum 6 is disposed in the transition bin 5. In order to recover the dust generated when the raw material is fed to the primary drying drum 6, the lower portion of the transition bin 5 is provided with a primary coarse powder dust collecting hopper body 53 located below the upper end of the primary drying drum 6, and the lower portion of the primary coarse powder dust collecting hopper body 53 is provided with a powder returning screw conveyor 54. Wherein, the powder outlet of the powder returning screw conveyer 54 is connected with the powder inlet of the coarse powder recovering screw conveyer 28, the powder outlet of the coarse powder recovering screw conveyer 28 is communicated with the powder inlet of a primary raw material vibrating screen 7, and the coarse powder is put into the primary raw material vibrating screen 7 for use.

In this embodiment, the lower portion of the transition chamber 5 is provided with two discharging channels located below the lower end of the regenerative drying drum 16 and a regenerative material distributing mechanism 55 for controlling one of the two discharging channels to discharge, the regenerative material distributing mechanism 55 includes a material distributing plate 57 and a driving mechanism 58, the lower portion of the material distributing plate 57 is rotatably installed at the lower portion of the transition chamber 5, two ends of a rotating shaft of the material distributing plate 57 are respectively exposed outside the transition chamber 5, the driving mechanism 58 is installed at the outer wall of the transition chamber 5, and the driving mechanism 58 drives the material distributing plate 57 to swing to switch the two discharging channels. Further, the driving mechanism 58 comprises a swing arm 59 and an air cylinder 60, one end of the swing arm 59 is fixedly connected with one end of a rotating shaft of the material distributing plate 57, a cylinder end of the air cylinder 60 is hinged and fixed on the outer wall of the transition bin 5, a piston rod end of the air cylinder 60 is hinged with the other end of the swing arm 59, and the swing arm 59 is pushed and pulled to rotate through the air cylinder 60, so that the material distributing plate 57 rotates to open one of the material discharging channels and close the other material discharging channel, and a material is selected to be discharged; in order to better control the position of the material distributing plate 57, a travel switch 61 for triggering the swing arm 59 to rotate in place is installed on the outer wall of the transition chamber 5, and is preferably but not limited to be arranged above the swing arm 59, when a piston rod of the air cylinder 60 contracts, the swing arm 59 rotates clockwise, when the piston rod contacts the travel switch 61 in a rotating manner, the air cylinder 60 is controlled to stop acting through a controller (a single chip microcomputer, a PLC and other existing control devices, and the specific model is not limited), and at this time, the material distributing plate 57 is switched from the left side to the right side; of course, the driving mechanism 58 may be a hydraulic cylinder, an electric motor, or the like, and the swing arm 59 may be omitted, and only the material distributing plate 57 may be driven to rotate.

In this embodiment, two temporary storage bins 17 for regenerated hot material are installed in the middle of the main building and are correspondingly communicated with the two discharge channels of the transition bin 5. In order to improve the regeneration effect, the tops of the two temporary storage bins 17 for the regenerated hot materials are connected with a regenerant adding device 19 together, the regenerant is weighed by the regenerant adding device 19 and then sprayed into the temporary storage bin 17 for the regenerated hot materials, and the added temporary storage bin 17 for the regenerated hot materials can ensure that the regenerant has sufficient time to be fully dispersed, permeated and mixed with the old asphalt in the RAP. A recycled material metering hopper 18 is arranged below the two recycled hot material temporary storage bins 17, the two recycled hot material temporary storage bins 17 can temporarily store recycled hot materials of two specifications, the recycled hot materials can be respectively weighed, metered, thrown and stirred, and the recycled material grading independent metering process is realized. A mixing cylinder 11 is arranged below the reclaimed material metering hopper 18, and a finished product bin 12 is arranged below the mixing cylinder 11.

In this embodiment, the below of primary drying roller 6 is provided with former raw material shale shaker 7, the lower end bottom discharge gate of primary drying roller 6 is connected with the feed inlet of former raw material shale shaker 7, the below of former raw material shale shaker 7 is provided with former raw material hot bunker 8, each discharge gate of former raw material shale shaker 7 corresponds with each feed inlet of former raw material hot bunker 8 respectively and is connected. The raw material hot bunker 8 is characterized in that a raw material metering hopper 9 is arranged below the raw material hot bunker 8, a raw material chute 10 is arranged below a discharge hole of the raw material metering hopper 9, and the raw material chute 10 is connected to a stirring cylinder 11.

In this embodiment, in order to reduce environmental pollution, the higher end of the regenerative drying drum 16 is provided with a waste gas chamber 31, the upper part of the waste gas chamber 31 is connected with a first return air flue pipe 27, the air outlet of the first return air flue pipe 27 is connected with the air inlet of a third induced draft fan 47 (preferably, but not limited to, a variable frequency induced draft fan), the air outlet of the third induced draft fan 47 is connected with the air inlet of a second return air flue pipe 48, the air outlet of the second return air flue pipe 48 is connected with the lower end of the primary drying drum 6 and leads to the front of the burner 20, all particles and blue smoke are sent back to the primary drying drum 6 and introduced behind the flame of the burner 20, harmful gas is burned and then discharged, and this process helps to greatly reduce emissions and odor.

In this embodiment, in order to reduce environmental pollution, the upper portion of the exhaust gas chamber 31 is connected with a first induced draft smoke tube 50, an air outlet of the first induced draft smoke tube 50 is connected with an air inlet of a first induced draft fan 32 (preferably but not limited to a variable frequency induced draft fan), an air outlet of the first induced draft fan 32 is connected with an air inlet of a bag-type dust remover 29, and dust smoke is filtered by the bag-type dust remover 29 and then discharged to the atmosphere. In order to recover the dust generated when the reclaimed materials are fed to the reclaiming drying roller 16, a dust collecting hopper is arranged at the bottom of the waste gas chamber 31, a powder belt conveyor 30 is arranged below a discharge port of the dust collecting hopper, and a discharge end of the powder belt conveyor 30 leads to one of the reclaiming hot material temporary storage bins 17 to reuse the powder.

In this embodiment, in order to reduce environmental pollution, the upper portion of the transition bin 5 is connected with a second induced draft smoke tube 49, an air outlet of the second induced draft smoke tube 49 is connected with an air inlet of a second induced draft fan 33 (preferably but not limited to a variable frequency induced draft fan), an air outlet of the second induced draft fan 33 is connected with an air inlet of a bag-type dust remover 29, and dust smoke is filtered by the bag-type dust remover 29 and then discharged to the atmosphere.

In the present embodiment, the feeding port of the primary drying drum 6 is communicated with the discharging port of the primary material feeding device, which preferably but not limited to adopt the following structure: including former raw material feed bin 1, the primary belt conveyor that gathers materials 2, primary material lifting machine 3 and upper portion band conveyer 4, former raw material feed bin 1 sets up the bottom next door at the main building, the bottom of former raw material feed bin 1 is provided with former raw material gradation belt conveyor, the discharge end that primary material gradation belt conveyor was joined in marriage sets up in the feed end top of primary belt conveyor 2 that gathers materials, the discharge end of primary belt conveyor 2 that gathers materials sets up in the feed inlet top of former raw material lifting machine 3, the discharge gate of former raw material lifting machine 3 sets up in the feed end top of upper portion belt conveyor 4, the discharge end of upper portion belt conveyor 4 accesss to the primary material import of transition bin 5, the primary material export of transition bin 5 accesss to the higher end feed inlet of primary drying cylinder 6. The raw material is firstly conveyed to a primary aggregate belt conveyor 2 by a primary material grading belt conveyor, then conveyed to a primary material elevator 3 by the primary aggregate belt conveyor 2, then lifted to a top belt conveyor 4 by the primary material elevator 3, conveyed to a transition bin 5 by the top belt conveyor 4, thrown to a primary drying roller 6 by a material sliding guide plate 56 in the transition bin 5 for drying, and then temporarily stored, weighed and thrown into a stirring cylinder 11 for stirring after drying.

In the present embodiment, the feeding port of the regeneration drying drum 16 is communicated with the discharging port of the regeneration material supplying device, and the regeneration material supplying device preferably but not limited to adopt the following structure: including regeneration material feed bin 13, regeneration band conveyer 14 and the regeneration material lifting machine 15 of gathering materials, regeneration material feed bin 13 sets up the bottom next door at the main building, the bottom of regeneration material feed bin 13 is provided with regeneration material gradation band conveyer, regeneration material gradation band conveyer's discharge end sets up in regeneration material belt conveyer 14's feed end top of gathering materials, regeneration material belt conveyer 14's discharge end sets up in regeneration material lifting machine 15's feed inlet top, regeneration material lifting machine 15's discharge gate accesss to regeneration drying drum 16's higher end feed inlet. The reclaimed materials are conveyed to a reclaimed material belt conveyor 14 through a reclaimed material grading belt conveyor, conveyed to a reclaimed material hoister 15 through the reclaimed material belt conveyor 14, lifted and dried in a reclaimed drying roller 16, respectively thrown into two reclaimed hot material temporary storage bins 17 through a reclaimed material distributing mechanism 55 at the lower part of a transfer bin 5 after being dried, weighed and thrown into a stirring cylinder 11 for stirring.

The working principle of the drying equipment for asphalt mixture regeneration in the embodiment is as follows: correspondingly sending the coarse raw material and the coarse reclaimed material into a primary drying roller 6 and a regenerative drying roller 16, heating and drying the primary material in the primary drying roller 6 through a burner 20, feeding the dried primary hot material into a primary material vibrating screen 7 for vibrating and screening, and feeding the screened primary hot materials of different grades into a primary raw material hot bin 8 for storage for later use; hot air in the primary drying roller 6 enters the regenerative drying roller 16 through the transition chamber 5 to heat and dry the regenerative materials, and the dried regenerative hot materials enter the two temporary regenerative hot material storage bins 17 through the regenerative material distributing mechanism 55 of the transition chamber 5 to be stored for later use; the regenerant is added into the two temporary storage bins 17 of the regenerated hot material by a regenerant adding device 19, and the regenerant permeates into the regenerated hot material from top to bottom.

Before stirring, the primary hot materials at all levels in the primary hot material bin 8 are respectively fed into a primary material weighing hopper 9 through a primary material chute 10 for weighing and metering, the regenerated hot materials in the regenerated hot material temporary storage bin 17 are fed into a regenerated material weighing hopper 18 for weighing and metering, the cold-patch materials, the asphalt and the mineral powder are correspondingly fed into the cold-patch materials weighing hopper, the asphalt metering cylinder and the mineral powder metering hopper for weighing and metering, the metered primary hot materials, the regenerated hot materials, the cold-patch materials, the asphalt and the mineral powder are respectively fed into a stirring cylinder 11, all the materials are fully stirred and mixed through the stirring cylinder 11 to form a qualified regenerated asphalt mixture with strict gradation, and finally the qualified regenerated asphalt mixture is stored in a finished product bin 12.

In particular, the components and devices not described in detail in this embodiment are all existing mature products, such as the regenerant adding device 19, various belt conveyors, various hoists, various screw conveyors, various bins, various weighing hoppers, the bag-type dust remover 29, the stirring cylinder 11, etc., for example, the regenerant adding device 19 includes a regenerant storage tank, a weighing device and a conveying device, and the regenerant flows quantitatively from the regenerant storage tank to the weighing device and then is conveyed to the regenerated hot material temporary storage bin 17 by the conveying device (including a conveying pump and a conveying pipe).

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and any person skilled in the art should not depart from the technical solution of the present invention, and any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention should fall within the scope of the present invention.

Claims (10)

1. The utility model provides a drying equipment for bituminous mixture regeneration which characterized in that: including primary drying roller and regeneration drying roller, primary drying roller and regeneration drying roller slope respectively install the upper portion at the main building, primary drying roller's lower extreme is installed and is dried the combustor that the roller shared with the regeneration, primary drying roller's higher end is relative with regeneration drying roller's lower extreme and is connected with the transition bin between the two.

2. The drying apparatus for asphalt mixture recycling according to claim 1, characterized in that: the transition bin is internally provided with a row of powder clapboards which are distributed at intervals up and down, the powder clapboards are fixed in an inclined mode, a hot air inclined through hole is formed between every two adjacent powder clapboards, the lower end of the hot air inclined through hole faces to the primary drying roller, and the higher end of the hot air inclined through hole faces to the regenerative drying roller.

3. The drying apparatus for asphalt mixture recycling according to claim 1, characterized in that: a material sliding guide plate for guiding the primary material to enter the higher end of the primary drying roller is arranged in the transition bin; the lower part of transition bin is provided with the former middlings dust collection bucket body that is located the higher end below of former drying drum, the lower part of former middlings dust collection bucket body is provided with back whitewashed screw conveyer.

4. The drying apparatus for asphalt mixture recycling according to claim 1, characterized in that: the lower part of the transition bin is provided with two discharging channels positioned below the lower end of the regeneration drying roller and a regeneration distributing mechanism for controlling the two discharging channels to select one for discharging, the regeneration distributing mechanism comprises a distributing plate and a driving mechanism, the lower part of the distributing plate is rotatably installed at the lower part of the transition bin, two ends of a rotating shaft of the distributing plate are respectively exposed outside the transition bin, the driving mechanism is installed on the outer wall of the transition bin, and the driving mechanism drives the distributing plate to swing so as to switch the two discharging channels.

5. The drying apparatus for asphalt mixture recycling according to claim 4, characterized in that: and the middle part of the main building is provided with two temporary storage bins for regenerative thermal materials, which are correspondingly communicated with the two discharge channels of the transition bin.

6. The drying apparatus for asphalt mixture recycling according to claim 5, characterized in that: the tops of the two temporary storage bins for regenerated hot materials are connected with a regenerant adding device together.

7. The drying apparatus for asphalt mixture recycling according to claim 1, characterized in that: the below of primary drying roller is provided with former raw material shale shaker, the lower end bottom discharge gate of former drying roller is connected with the feed inlet of former raw material shale shaker, the below of former raw material shale shaker is provided with former raw material hot stock storehouse, each discharge gate of former raw material shale shaker corresponds with each feed inlet of former raw material hot stock storehouse respectively and is connected.

8. The drying apparatus for asphalt mixture recycling according to claim 1, characterized in that: the higher end of regeneration drying roller is equipped with the exhaust gas chamber, the upper portion of exhaust gas chamber is connected with first return air tobacco pipe, the air outlet of first return air tobacco pipe is connected with the air intake of third draught fan, the air outlet of third draught fan is connected with the air intake of second return air tobacco pipe, the air outlet of second return air tobacco pipe is connected with the lower end of primary drying roller and leads to the place ahead of combustor.

9. The drying apparatus for asphalt mixture recycling according to claim 8, characterized in that: the upper portion of waste gas chamber is connected with first induced air tobacco pipe, the air outlet of first induced air tobacco pipe is connected with the air intake of first draught fan, the air outlet of first draught fan is connected with the air intake of sack cleaner.

10. The drying apparatus for asphalt mixture recycling according to claim 8, characterized in that: the upper portion of transition bin is connected with second induced air tobacco pipe, the air outlet of second induced air tobacco pipe is connected with the air intake of second draught fan, the air outlet of second draught fan is connected with the air intake of sack cleaner.

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