Efficient asphalt mixture full-regeneration system

Abstract

The utility model relates to an efficient asphalt mixture full-regeneration system which comprises a regeneration drying cylinder, the feeding end of the regeneration drying cylinder is communicated with an air inlet of a feeding box, the discharging end of the regeneration drying cylinder is connected with the feeding end of a discharging box, and the feeding end of the regeneration drying cylinder is further connected with the discharging end of a batching unit through a conveying unit; the discharging end of the discharging box is connected with the feeding end of the metering discharging unit, the discharging end of the metering discharging unit is connected with the feeding end of the stirring equipment, and the feeding end of the stirring equipment is further connected with the discharging end of the feeding unit; a first gas port is formed in the discharging box and is connected with the combustor through the combustion chamber; a second gas port is formed in the feeding box and connected with the tail gas treatment unit. Materials can be prevented from being in direct contact with flames in the drying process, so that asphalt aging is prevented; meanwhile, the heat exchange efficiency is high, the tail gas temperature is low, treatment is convenient, and production resources are saved.

Description

Technical Field

[0001] The utility model relates to the technical field of asphalt mixture regeneration, in particular to an efficient asphalt mixture full regeneration system. Background Art

[0002] Asphalt mixture regeneration technology is an important technology in asphalt pavement maintenance. It uses a special asphalt regeneration system to clean and regenerate waste asphalt pavements, and re-prepare the waste asphalt recycled materials into a mixture with certain strength, stability and durability, and use it as a regeneration of waste pavements or as a filler for mixing new asphalt mixtures.

[0003] In the prior art, asphalt regeneration systems usually use a burner-based heat radiation method to dry the asphalt regeneration material and raw material in the drying drum. However, since the direction of material from input to output in the traditional asphalt regeneration system is the same as the direction of the burner's fire, the material is in direct contact with the flame during the drying process; in addition, the heat exchange efficiency of this heating method is low, and the exhaust gas temperature generated during the drying process is higher than the material temperature, which increases the difficulty of exhaust gas treatment and causes energy waste. Utility Model Content

[0004] In view of the shortcomings of the above-mentioned existing production technologies, the applicant provides an efficient asphalt mixture full regeneration system, which can avoid direct contact between materials and flames during the drying process, thereby preventing asphalt aging; at the same time, it has high heat exchange efficiency, low exhaust gas temperature, easy processing, and saves production resources.

[0005] The technical solution adopted by the utility model is as follows:

[0006] An efficient asphalt mixture full regeneration system, comprising a regeneration drying drum, wherein the feed end of the regeneration drying drum is connected to the air inlet of a feed box, the discharge end of the regeneration drying drum is connected to the feed end of the discharge box, the feed end of the regeneration drying drum is also connected to the discharge end of a batching unit through a conveying unit, and the batching unit puts a first raw material with a good proportion into the regeneration drying drum through the conveying unit for drying, thereby obtaining a mixture;

[0007] The discharge end of the discharge box is connected to the feed end of the metering discharge unit, the discharge end of the metering discharge unit is connected to the feed end of the stirring device, the feed end of the stirring device is also connected to the discharge end of the feed unit, and the feed unit adds the second raw material to the stirring device;

[0008] The mixed material enters the metering and discharging unit through the discharging box, and enters the stirring device after being metered by the metering and discharging unit. The stirring device stirs and mixes the mixed material and the second raw material to obtain a finished material;

[0009] The discharge box is provided with a first air inlet, which is connected to the burner through a combustion chamber; the feed box is provided with a second air inlet, which is connected to the exhaust gas treatment unit. The burner is ignited to generate high-temperature flue gas in the combustion chamber. The high-temperature flue gas enters the discharge box through the first air inlet and enters the regeneration drying cylinder. The high-temperature flue gas dries the material in the regeneration drying cylinder to generate low-temperature exhaust gas. The low-temperature exhaust gas enters the feed box from the regeneration drying cylinder and enters the exhaust gas treatment unit through the second air inlet. The low-temperature exhaust gas is discharged after dust removal treatment by the exhaust gas treatment unit.

[0010] As a further improvement of the above technical solution:

[0011] The regeneration drying cylinder is arranged obliquely.

[0012] The temperature of the low-temperature tail gas is lower than that of the high-temperature flue gas.

[0013] The first air port is opened on the side wall surface of the discharge box and is arranged opposite to the feed end of the discharge box.

[0014] The second air port is opened on the top wall surface of the feed box.

[0015] The batching unit comprises a plurality of batching hoppers.

[0016] The conveying unit comprises a material collecting conveying belt and a hoist connected to the discharge end of the material collecting conveying belt.

[0017] The metering and discharging unit comprises a hot material bin and a metering bin connected to a discharging end of the hot material bin.

[0018] The exhaust gas treatment unit includes a cyclone dust collector and a bag dust collector connected in series in sequence. The air inlet of the cyclone dust collector is connected to the second air outlet through an exhaust pipe group, and the exhaust outlet of the bag dust collector is connected to an exhaust pipe. An induced draft fan is installed in the exhaust pipe. The induced draft fan provides negative pressure to drive the low-temperature exhaust gas to be discharged through the exhaust pipe.

[0019] The feeding unit comprises a modifier metering and adding device and an asphalt metering and adding device. The modifier metering and adding device is used for metering and feeding the regeneration agent, and the asphalt metering and adding device is used for metering and feeding the asphalt.

[0020] The beneficial effects of the utility model are as follows:

[0021] The utility model has a compact and reasonable structure and is easy to operate. By arranging a discharge box, a feed box and a combustion chamber, the burner can generate high-temperature flue gas, and heat and dry the material in the regeneration drying cylinder based on the hot air heating method, thereby avoiding direct contact between the burner flame and the asphalt recycled material and preventing asphalt aging; at the same time, by making the flue gas flow direction opposite to the material movement direction, the heat exchange efficiency in the system is greatly improved based on the countercurrent method.

[0022] The utility model also has the following advantages:

[0023] (1) In the present invention, the regeneration drying cylinder is arranged at an angle so that its feed end is higher than its discharge end, thereby facilitating the movement of the material inside the regeneration drying cylinder from the feed to the discharge direction.

[0024] (2) The low-temperature exhaust gas generated in the present invention has a low temperature, which is convenient for the exhaust gas treatment unit to process, thereby making the layout of the exhaust gas treatment unit compact and reducing the cost of exhaust gas treatment.

[0025] (3) The utility model is also provided with a recycled material component analyzer, through which the components of asphalt recycled material and finished material are tested, thereby realizing high-quality and high-efficiency full recycling production of asphalt recycled material.

[0026] (4) In the present invention, a batching unit is provided, wherein a weighing device is provided on the batching hopper and is independently controlled, thereby enabling accurate feeding of raw materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of the utility model.

[0028] Figure 2 This is a schematic diagram of the preparation of finished materials in the utility model.

[0029] Figure 3 It is a schematic diagram of the structure of the tail gas treatment unit in the utility model.

[0030] Among them: 1. batching unit; 101. batching hopper; 2. conveying unit; 201. collecting conveyor belt; 202. elevator; 3. discharge box; 301. first air port; 4. feed box; 401. second air port; 5. regeneration drying cylinder; 6. combustion chamber; 7. hot material bin; 8. metering bin; 9. burner; 10. stirring equipment; 11. feed unit; 1101. modifier metering and adding equipment; 1102. asphalt metering and adding equipment; 12. exhaust pipe group; 13. cyclone dust collector; 14. bag dust collector; 15. exhaust pipe; 16. induced draft fan; 17. asphalt flue gas treatment integrated equipment. DETAILED DESCRIPTION

[0031] The specific implementation of the present utility model is described below in conjunction with the accompanying drawings.

[0032] The structure and functions of the utility model are as follows:

[0033] like Figure 1-Figure 3 As shown, a highly efficient asphalt mixture full regeneration system includes a regeneration drying drum 5, the feed end of the regeneration drying drum 5 is connected to the air inlet of the feed box 4, the discharge end of the regeneration drying drum 5 is connected to the feed end of the discharge box 3, the feed end of the regeneration drying drum 5 is also connected to the discharge end of the batching unit 1 through the conveying unit 2, the batching unit 1 puts the first raw material with a good proportion into the regeneration drying drum 5 through the conveying unit 2 for drying, so as to obtain a mixture; the discharge end of the discharge box 3 is connected to the feed end of the metering and discharging unit, the discharge end of the metering and discharging unit is connected to the feed end of the mixing device 10, the feed end of the mixing device 10 is also connected to the discharge end of the feeding unit 11, the feeding unit 11 adds the second raw material into the mixing device 10; the mixture enters the metering and discharging unit through the discharge box 3, After being metered by the metering discharging unit, it enters the mixing device 10, and the mixing device 10 mixes the mixture with the second raw material to obtain a finished product; the discharging box 3 is provided with a first gas port 301, and the first gas port 301 is connected to the burner 9 through the combustion chamber 6; the feeding box 4 is provided with a second gas port 401, and the second gas port 401 is connected to the tail gas treatment unit, and the burner 9 is ignited to generate high-temperature flue gas in the combustion chamber 6, and the high-temperature flue gas enters the discharging box 3 through the first gas port 301, and enters the regeneration drying cylinder 5, and the high-temperature flue gas dries the material in the regeneration drying cylinder 5 to generate low-temperature tail gas, and the low-temperature tail gas enters the feeding box 4 from the regeneration drying cylinder 5, and enters the tail gas treatment unit through the second gas port 401, and the low-temperature tail gas is discharged after dust removal treatment by the tail gas treatment unit. The asphalt mixture full regeneration system of the utility model can realize the full utilization of asphalt recycled materials, and has high output, high energy utilization rate, and good product quality.

[0034] The regeneration drying cylinder 5 is arranged at an inclination, so that its feeding end is higher than its discharging end, which facilitates the movement of the material inside the regeneration drying cylinder 5 from the feeding direction to the discharging direction under the action of gravity.

[0035] The temperature of low-temperature tail gas is lower than that of high-temperature flue gas. In the present invention, asphalt recycled material and raw material are heated and dried in the regeneration drying drum 5 at the same time. The temperature of high-temperature flue gas generated by the burner 9 is about 1200°C, and the temperature of low-temperature tail gas generated during the drying process is about 100°C. By making the flue gas flow direction opposite to the material movement direction, the heat exchange efficiency in the system is greatly improved based on the countercurrent method, and the temperature of low-temperature tail gas can be made much lower than that of high-temperature flue gas. At the same time, since the temperature of low-temperature tail gas is relatively low, it is convenient for the tail gas treatment unit to process, so that the layout of the tail gas treatment unit can be compact and the cost of tail gas treatment can be reduced.

[0036] In addition, in the utility model, by setting up the combustion chamber 6, the burner 9 can generate high-temperature flue gas, and heat and dry the material in the regeneration drying cylinder 5 based on the hot air heating method, thereby avoiding direct contact between the flame of the burner 9 and the asphalt recycled material, preventing asphalt aging.

[0037] The first air inlet 301 is provided on the side wall of the discharge box 3 and arranged opposite to the feeding end of the discharge box 3. The first air inlet 301 is used to allow the high-temperature flue gas in the combustion chamber 6 to enter the regeneration drying cylinder 5 through the discharge box 3. The first air inlet 301 and the feeding port of the discharge box 3 (corresponding to the feeding end of the discharge box 3) are arranged on the opposite side walls of the discharge box 3, respectively, to facilitate the rapid flow of the high-temperature flue gas.

[0038] The second air inlet 401 is opened on the top wall of the feed box 4. In addition, the air inlet of the feed box 4 is opened on its side wall to facilitate the low-temperature exhaust gas in the regeneration drying cylinder 5 to flow to the exhaust gas treatment unit through the feed box 4.

[0039] In the utility model, the first raw material includes asphalt recycled material (old asphalt) and virgin material (aggregate, etc.). The asphalt recycled material is tested for its components by a recycled material component analyzer, so that the amount of virgin material required to be consumed is predetermined according to product requirements, and then the asphalt recycled material and virgin material are accurately fed through the batching hopper 101 in the batching unit 1, thereby realizing the full recycling production of the asphalt recycled material.

[0040] The batching unit 1 includes a plurality of batching hoppers 101 , each of which is provided with a weighing device, and the plurality of batching hoppers 101 are independently controlled to achieve accurate feeding of raw materials.

[0041] The conveying unit 2 includes a collecting conveyor belt 201 and an elevator 202 connected to the discharge end of the collecting conveyor belt 201. The conveying unit 2 is used to convey the first raw material. The collecting conveyor belt 201 can convey the first raw material in a horizontal direction, and the elevator 202 can convey the raw material in a vertical direction.

[0042] The metering and discharging unit comprises a hot material bin 7 and a metering bin 8 connected to the discharging end of the hot material bin 7 .

[0043] The discharge port of the discharge box 3 (corresponding to the discharge end of the discharge box 3) is arranged on the bottom wall thereof, and the feed port of the hot material bin 7 is connected with the discharge port of the discharge box 3. After the drying of the materials in the regeneration drying cylinder 5 is completed, the mixed materials enter the hot material bin 7 through the discharge box 3 for temporary storage. The outside of the hot material bin 7 is equipped with an insulation layer to keep the mixed materials inside it warm.

[0044] When it is necessary to add mixed materials to the stirring device 10 , the mixed materials temporarily stored in the hot material bin 7 fall into the metering bin 8 , and after being weighed and measured by the metering bin 8 , a certain amount of mixed materials is added to the stirring device 10 .

[0045] The tail gas treatment unit includes a cyclone dust collector 13 and a bag dust collector 14 connected in series, the air inlet of the cyclone dust collector 13 is connected to the second air port 401 through the exhaust pipe group 12, the exhaust port of the bag dust collector 14 is connected to the exhaust pipe 15, and the exhaust pipe 15 is equipped with an induced draft fan 16, which provides negative pressure to drive the low-temperature tail gas to be discharged through the exhaust pipe 15. The tail gas treatment unit is used to perform dust removal treatment on the low-temperature tail gas so that it can be discharged into the atmosphere after meeting the emission standards.

[0046] In the utility model, an integrated asphalt flue gas treatment device 17 is also arranged between the bag dust collector 14 and the exhaust chimney 15, which is used to further purify the low-temperature flue gas; specifically, the exhaust port of the bag dust collector 14 is connected to the air inlet of the integrated asphalt flue gas treatment device 17 through a first pipe group, and the exhaust port of the integrated asphalt flue gas treatment device 17 is connected to the air inlet of the exhaust chimney 15 through a second pipe group.

[0047] In the utility model, the second raw material includes a regenerating agent, asphalt and powder;

[0048] The feed unit 11 includes a modifier metering and adding device 1101 and an asphalt metering and adding device 1102. The modifier metering and adding device 1101 is used to meter and feed the regeneration agent, and to modify the old asphalt by adding the regeneration agent to restore the original performance of the old asphalt; the asphalt metering and adding device 1102 is used to meter and feed the asphalt, and to make the old asphalt meet the grading requirements by adding the lost asphalt;

[0049] In addition, the feeding unit 11 also includes powder metering and adding equipment, warm mix agent metering and adding equipment, anti-rutting agent adding equipment, etc.

[0050] The working process of the utility model is as follows:

[0051] The composition of asphalt recycled materials is tested by a recycled material component analyzer, so as to predetermine the ratio of each raw material required for asphalt regeneration;

[0052] The first raw material is accurately proportioned and fed through the proportioning unit 1, and the proportioned first raw material is put into the regeneration drying drum 5 through the conveying unit 2. At the same time, the burner 9 is ignited and burned to generate high-temperature flue gas in the combustion chamber 6;

[0053] The high-temperature flue gas flows through the discharge box 3 to the regeneration drying cylinder 5, where the material inside is heated and dried to obtain a mixed material. At the same time, in this process, the high-temperature flue gas is heat-exchanged to form low-temperature tail gas;

[0054] The dried mixed material enters the hot material bin 7 through the discharge box 3, and then enters the mixing device 10 after being weighed and measured by the metering bin 8. At the same time, the feeding unit 11 adds a certain amount of the second raw material to the mixing device 10, and the mixing device 10 mixes the second raw material and the mixed material to obtain a finished material;

[0055] The low-temperature exhaust gas flows through the exhaust pipe group 12 to the cyclone dust collector 13 for dust removal, then enters the bag dust collector 14 for further dust removal, and then enters the asphalt fume treatment integrated equipment 17 for purification, and finally is discharged into the atmosphere through the exhaust chimney 15 under the action of the induced draft fan 16.

[0056] The above description is an explanation of the utility model, not a limitation of the utility model. The scope of the utility model is defined by the claims. Any form of modification can be made within the protection scope of the utility model.

Claims

1. An efficient asphalt mixture full regeneration system, characterized by: The invention comprises a regeneration drying cylinder (5), wherein the feed end of the regeneration drying cylinder (5) is connected to the air inlet of the feed box (4), the discharge end of the regeneration drying cylinder (5) is connected to the feed end of the discharge box (3), and the feed end of the regeneration drying cylinder (5) is also connected to the discharge end of the batching unit (1) through the conveying unit (2). The batching unit (1) puts the first raw material with a good proportion into the regeneration drying cylinder (5) through the conveying unit (2) for drying, thereby obtaining a mixed material; The discharge end of the discharge box (3) is connected to the feed end of the metering discharge unit, the discharge end of the metering discharge unit is connected to the feed end of the stirring device (10), the feed end of the stirring device (10) is also connected to the discharge end of the feed unit (11), and the feed unit (11) adds the second raw material to the stirring device (10); The mixed material enters the metering and discharging unit through the discharging box (3), and after being metered by the metering and discharging unit, enters the stirring device (10), and the stirring device (10) stirs and mixes the mixed material and the second raw material, thereby obtaining a finished material; The discharge box (3) is provided with a first air port (301), and the first air port (301) is connected to the burner (9) through the combustion chamber (6); the feed box (4) is provided with a second air port (401), and the second air port (401) is connected to the exhaust gas treatment unit. The burner (9) is ignited to generate high-temperature flue gas in the combustion chamber (6). The high-temperature flue gas enters the discharge box (3) through the first air port (301) and enters the regeneration drying cylinder (5). The high-temperature flue gas dries the material in the regeneration drying cylinder (5) to generate low-temperature exhaust gas. The low-temperature exhaust gas enters the feed box (4) from the regeneration drying cylinder (5) and enters the exhaust gas treatment unit through the second air port (401). The low-temperature exhaust gas is discharged after dust removal treatment in the exhaust gas treatment unit.

2. The efficient asphalt mixture full regeneration system according to claim 1, characterized in that: The regeneration drying cylinder (5) is arranged obliquely.

3. The efficient asphalt mixture full regeneration system according to claim 1, characterized in that: The temperature of the low-temperature tail gas is lower than that of the high-temperature flue gas.

4. The efficient asphalt mixture full regeneration system according to claim 1, characterized in that: The first air port (301) is opened on the side wall surface of the discharge box (3), and is arranged opposite to the inlet end of the discharge box (3).

5. The efficient asphalt mixture full regeneration system according to claim 1, characterized in that: The second air port (401) is opened on the top wall surface of the feed box (4).

6. The efficient asphalt mixture full regeneration system according to claim 1, characterized in that: The batching unit (1) comprises a plurality of batching hoppers (101).

7. The efficient asphalt mixture full regeneration system according to claim 1, characterized in that: The conveying unit (2) comprises a material collecting conveying belt (201) and a hoist (202) connected to the discharge end of the material collecting conveying belt (201).

8. The efficient asphalt mixture full regeneration system according to claim 1, characterized in that: The metering and discharging unit comprises a hot material bin (7) and a metering bin (8) connected to the discharging end of the hot material bin (7).

9. The efficient asphalt mixture full regeneration system according to claim 1, characterized in that: The exhaust gas treatment unit comprises a cyclone dust collector (13) and a bag dust collector (14) which are connected in series in sequence. The air inlet of the cyclone dust collector (13) is connected to the second air port (401) through an exhaust pipe group (12). The exhaust port of the bag dust collector (14) is connected to an exhaust pipe (15). An induced draft fan (16) is installed in the exhaust pipe (15). The induced draft fan (16) provides negative pressure to drive the low-temperature exhaust gas to be discharged through the exhaust pipe (15).

10. The efficient asphalt mixture full regeneration system according to claim 1, characterized in that: The feeding unit (11) comprises a modifier metering and adding device (1101) and an asphalt metering and adding device (1102), wherein the modifier metering and adding device (1101) is used for metering and feeding the regeneration agent, and the asphalt metering and adding device (1102) is used for metering and feeding the asphalt.

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