Asphalt mixture treatment device

Abstract

The utility model discloses an asphalt mixture treatment device which comprises a roller and a dust removal box, a discharging box is arranged on the lower side of the roller, an inner barrel is arranged in the roller, a discharging opening is formed in the side wall of the roller, a grid net barrel at the tail end of the inner barrel is arranged in the discharging box, a combustor communicated with the discharging box is arranged on one side of the discharging box, and a ventilation pipe penetrates through the discharging box. The combustor and the barrel interlayer are communicated through the ventilation pipe. The regenerated milling material is directly heated in the inner barrel, asphalt flue gas and dust generated by asphalt in the regenerated milling material in a high-temperature environment are pumped back into the combustor along the flue gas recovery pipe to be combusted and decomposed, the dust removal cloth bag is protected, the service life of the dust removal cloth bag is prolonged, meanwhile, oxygen in the roller and the discharging box is used for combustion-supporting consumption, and the service life of the dust removal cloth bag is prolonged. The oxidation reaction is avoided, so that the air pollution and the smoke dissipation of the asphalt mixture finished product are avoided, and the health of people is protected.

Description

Technical Field

[0001] The utility model belongs to the technical field of asphalt mixture processing, and in particular relates to an asphalt mixture processing device. Background Art

[0002] At present, asphalt mixing plants use recycled asphalt mixed with milling materials as the main production raw materials, and the heating of milling materials is mainly drum heating mode. The drum heats the asphalt milling materials mainly by passing high-temperature hot air through the inside of the drum to exchange heat with the milling materials. Since the milling materials contain asphalt, the asphalt fume and dust generated in a high temperature environment will enter the subsequent dust removal facilities or pipelines with the high-temperature hot air, which will not only cause great damage to the filtering performance of the dust removal bag, but also form serious dust accumulation in the pipeline, making it difficult to clean.

[0003] At the same time, since the asphalt in the milling material contains sulfide, during the heating process, it will react with the oxygen in the high-temperature flue gas to form sulfur oxides. Part of it enters the exhaust gas and requires later treatment, otherwise it is easy to exceed the emission standard and cause air pollution; the other part is deposited in the finished asphalt mixture. The asphalt mixture pavement after paving will emit an unpleasant odor in hot weather, affecting human health. Utility Model Content

[0004] In order to solve the above problems, the utility model provides an asphalt mixture processing device.

[0005] The utility model is implemented as follows: an asphalt mixture processing device includes a drum and a dust removal box, the drum is tilted downward so that the raw material and the recycled material slide downward while being heated, the dust removal box is arranged on the high side of the drum to process the exhaust gas, and a discharge box is arranged on the low side of the drum to facilitate the collection of the recycled material. An inner drum is fixedly arranged in the drum, and the center line of the inner drum is on the same straight line as the center line of the drum, so as to ensure the uniform thickness of the drum interlayer, which ensures that the raw material enters the drum interlayer along the raw material trough. It can also ensure uniform heating. A tube sandwich is formed between the drum and the inner drum to hold and heat the raw material. One end of the high tube sandwich is connected to the inside of the dust removal box, and the high-temperature flue gas enters the dust removal box along the tube sandwich for exhaust gas treatment. A raw material trough and a recycled material trough that are not connected to each other are opened obliquely downward through the dust removal box. One end of the raw material trough is connected to the tube sandwich, and the raw material enters the tube sandwich along the raw material trough. One end of the recycled material trough is connected to the central hole of the inner drum, and the recycled material enters the inner drum along the recycled material trough.

[0006] A retaining ring is arranged outside the drum near the discharge box to block the discharge port, a discharge hopper is fixedly arranged in the middle position of the lower end of the retaining ring, and a plurality of discharge ports are evenly arranged on the side wall of the drum located in the retaining ring to facilitate the discharge of raw materials, and the discharge ports correspond to the positions of the discharge hopper. A raw material buffer bin is arranged below the discharge hopper to collect the raw materials after heating. The raw materials slide to the discharge port as the drum rotates, and then are discharged into the raw material buffer bin along the discharge hopper.

[0007] A grid net cylinder is arranged in the discharge box to screen the recycled material, one end of the grid net cylinder is communicated with the inner cylinder and fixedly connected to ensure the stability of the position of the grid net cylinder, a through hole is opened in the middle position of the lower end of the discharge box and below the grid net cylinder, a hot material buffer bin is arranged below the through hole, and the recycled material falls into the hot material buffer bin along the through hole for storage after being screened by the grid net cylinder, a burner is arranged on the side of the discharge box away from the drum, the upper end of the discharge box is communicated with the upper end of the burner through a smoke recovery pipe, a smoke exhauster is arranged on the smoke recovery pipe, and when the smoke exhauster is started, asphalt smoke generated by the asphalt in the recycled milling material under high temperature environment The exhaust gas and dust are drawn back to the burner along the flue gas recovery pipe for combustion and decomposition. At the same time, the oxygen in the drum and the discharge box is consumed to assist combustion, thereby avoiding the occurrence of oxidation reaction, thereby avoiding air pollution and the unpleasant smell of the finished asphalt mixture. A plurality of ventilation pipes are evenly arranged on the outside of the grid mesh tube and pass through the discharge box to discharge the exhaust gas. One end of the ventilation pipe is fixed and connected to the burner to ensure the stability of the position of the ventilation pipe, and the other end of the ventilation pipe is connected to the tube interlayer. The high-temperature flue gas after combustion enters the tube interlayer along the ventilation pipe, which heats the raw material in the tube interlayer and the inner tube, thereby exchanging heat with the recycled material in the inner tube.

[0008] Preferably, a first ring sleeve is fixedly provided at one end of the dust removal box close to the drum, and a second ring sleeve is fixedly provided at one end of the discharge box close to the drum, the first ring sleeve and the second ring sleeve correspond to the positions of the drum and match in size, and the two ends of the drum are arranged in the first ring sleeve and the second ring sleeve, which ensures a reliable connection between the first ring sleeve and the second ring sleeve and the drum to prevent the drum from falling out and ensures smooth rotation of the drum.

[0009] Preferably, the inclination angle of the drum is 2 to 6 degrees, which not only ensures that the raw material and the recycled material slide along the drum and the inner drum, but also prolongs the heating time of the raw material and the recycled material, thereby ensuring the heating effect.

[0010] The beneficial effects of the utility model are as follows: the utility model has a reasonable structural design, the regenerated milling material is directly heated in the inner drum, the asphalt fume and dust generated by the asphalt in the regenerated milling material under high temperature environment are drawn back to the burner along the fume recovery pipe for combustion and decomposition, thereby protecting the dust removal bags and extending the service life of the dust removal bags, and at the same time, the oxygen in the drum and the discharge box is consumed for combustion, avoiding the occurrence of oxidation reaction, thereby avoiding air pollution and the escape of fume of the finished asphalt mixture product, and protecting people's health. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the structure of the utility model;

[0012] Figure 2 It is a schematic diagram of the cross-sectional structure of the utility model;

[0013] Figure 3 It is a structural schematic diagram of the drum;

[0014] Figure 4 It is a structural schematic diagram of one end of the dust removal box;

[0015] Figure 5 It is a structural schematic diagram of one end of the storage box;

[0016] Figure 6 It is the structural schematic diagram of the discharge hopper;

[0017] In the figure: 1. drum; 2. dust removal box; 3. discharge box; 4. inner drum; 5. drum interlayer; 6. raw material trough; 7. recycled material trough; 8. baffle ring; 9. discharge hopper; 10. discharge port; 11. raw material buffer bin; 12. grid net drum; 13. through hole; 14. hot material buffer bin; 15. burner; 16. flue gas recovery pipe; 17. smoke exhaust fan; 18. ventilation pipe; 19. first ring sleeve; 20. second ring sleeve. DETAILED DESCRIPTION

[0018] In order to more clearly understand the technical solution of the present invention, the present invention is further described below in conjunction with the accompanying drawings.

[0019] like Figure 1-6An asphalt mixture processing device shown includes a drum 1 and a dust removal box 2. The drum 1 is tilted downward so that the raw material and the recycled material can slide downward while being heated. The tilt angle of the drum 1 is 4°, which not only ensures that the raw material and the recycled material slide along the drum 1 and the inner drum 4, but also prolongs the heating time of the raw material and the recycled material, thereby ensuring the heating effect.The dust removal box 2 is arranged on the high side of the drum 1 to treat the exhaust gas. The low side of the drum 1 is provided with a discharge box 3 to facilitate the collection of recycled materials. An inner drum 4 is fixedly arranged in the drum 1. The center line of the inner drum 4 is on the same straight line as the center line of the drum 1 to ensure the uniformity of the thickness of the drum interlayer 5, which not only ensures that the raw material enters the drum interlayer 5 along the raw material trough 6, but also ensures uniform heating. A drum interlayer 5 is formed between the drum 1 and the inner drum 4 to hold and heat the raw material. One end of the drum interlayer 5 at a high point is connected to the interior of the dust removal box 2, and the high-temperature flue gas enters the dust removal box 2 along the drum interlayer 5 for exhaust gas treatment. A raw material trough 6 and a recycled material trough 7 that are not connected to each other are opened obliquely downward through the dust removal box 2. One end of the raw material trough 6 The end is connected with the tube interlayer 5, the raw material enters the tube interlayer 5 along the raw material trough 6, one end of the regenerated material trough 7 is connected with the central hole of the inner tube 4, the regenerated material enters the inner tube 4 along the regenerated material trough 7, and a retaining ring 8 is arranged on the outside of the drum 1 near the discharge box 3 to block the discharge port 10, and a discharge hopper 9 is fixedly arranged in the middle position of the lower end of the retaining ring 8. A plurality of discharge ports 10 are evenly arranged on the side wall of the drum 1 located in the retaining ring 8 to facilitate the discharge of raw materials. The discharge port 10 corresponds to the position of the discharge hopper 9. A raw material buffer bin 11 is arranged below the discharge hopper 9 to collect the raw materials after heating. The raw materials slide to the discharge port 10 as the drum 1 rotates, and then are discharged into the raw material buffer bin 11 along the discharge hopper 9. In the embodiment, a grid net cylinder 12 is arranged in the discharge box 3 to screen the recycled material. One end of the grid net cylinder 12 is connected to the inner cylinder 4 and fixedly connected to ensure the stability of the position of the grid net cylinder 12. A through hole 13 is opened in the middle position of the lower end of the discharge box 3 and below the grid net cylinder 12. A hot material buffer bin 14 is arranged below the through hole 13. After the recycled material is screened by the grid net cylinder 12, it falls into the hot material buffer bin 14 along the through hole 13 for storage. A burner 15 is arranged on the side of the discharge box 3 away from the drum 1. The upper end of the discharge box 3 is connected to the upper end of the burner 15 through a smoke recovery pipe 16. A smoke exhauster 17 is arranged on the smoke recovery pipe 16. When the smoke exhauster 17 is started, the asphalt in the recycled milling material is discharged under high temperature. The generated asphalt fume and dust are drawn back to the burner 15 along the fume recovery pipe 16 for combustion and decomposition. At the same time, the oxygen in the drum 1 and the discharge box 3 is consumed for combustion support to avoid the oxidation reaction, thereby avoiding air pollution and the unpleasant smell of the finished asphalt mixture. Four ventilation pipes 18 are evenly arranged on the outside of the grid tube 12 through the discharge box 3 to discharge the exhaust gas. One end of the ventilation pipe 18 is fixed and connected to the burner 15 to ensure the stability of the position of the ventilation pipe 18. The other end of the ventilation pipe 18 is connected to the tube interlayer 5. The high-temperature flue gas after combustion enters the tube interlayer 5 along the ventilation pipe 18, heats the raw material in the tube interlayer 5, and heats the inner tube 4, thereby exchanging heat with the recycled material in the inner tube 4.

[0020] A first ring sleeve 19 is fixedly provided at one end of the dust removal box 2 close to the drum 1, and a second ring sleeve 20 is fixedly provided at one end of the discharge box 3 close to the drum 1. The first ring sleeve 19 and the second ring sleeve 20 correspond to the position of the drum 1 and match in size. Both ends of the drum 1 are arranged in the first ring sleeve 19 and the second ring sleeve 20, which ensures a reliable connection between the first ring sleeve 19 and the second ring sleeve 20 and the drum 1 to prevent the drum 1 from falling out and ensures the smooth rotation of the drum 1.

[0021] The raw material is poured into the tube interlayer 5 along the raw material trough 6, and the recycled milling material is poured into the inner tube 4 along the recycled material trough 7. The burner 15 burns and decomposes the asphalt fume and dust generated by the asphalt in the recycled milling material under high temperature environment. The high-temperature fume enters the tube interlayer 5 along the ventilation pipe 18 to heat the inner tube 4 and the raw material. After the raw material reaches the discharge port 10, it is discharged along the unloading hopper 9 to the raw material buffer bin 11. The recycled milling material is screened by the grid mesh tube 12 and falls into the hot material buffer bin 14 along the through hole 13.

[0022] The above description is only a preferred embodiment of the present utility model, so all equivalent changes or modifications made according to the structure, features and principles described in the scope of the present utility model patent application are included in the scope of the present utility model patent application.

Claims

1. An asphalt mixture processing device, comprising a drum and a dust removal box, characterized in that: The drum is arranged obliquely downward, the dust removal box is arranged on the high side of the drum, a discharge box is arranged on the low side of the drum, an inner drum is fixedly arranged in the drum, the center line of the inner drum is on the same straight line as the center line of the drum, a drum sandwich is formed between the drum and the inner drum, one end of the drum sandwich at the high end is connected to the interior of the dust removal box, and a raw material trough and a recycled material trough which are not connected to each other are opened obliquely downward through the dust removal box, one end of the raw material trough is connected to the drum sandwich, and one end of the recycled material trough is connected to the center hole of the inner drum. A retaining ring is arranged outside the drum near the discharge box, a discharge hopper is fixedly arranged in the middle of the lower end of the retaining ring, a plurality of discharge ports are evenly arranged on the side wall of the drum located in the retaining ring, the discharge ports correspond to the positions of the discharge hopper, and a raw material buffer bin is arranged below the discharge hopper. A grid net cylinder is arranged in the discharge box, one end of the grid net cylinder is communicated with the inner cylinder and fixedly connected, a through hole is opened in the middle position of the lower end of the discharge box and below the grid net cylinder, a hot material buffer bin is arranged below the through hole, a burner is arranged on the side of the discharge box away from the drum, the upper end of the discharge box is communicated with the upper end of the burner through a smoke recovery pipe, a smoke exhaust fan is arranged on the smoke recovery pipe, a plurality of ventilation pipes are evenly arranged through the discharge box and located outside the grid net cylinder, one end of the ventilation pipe is fixed and communicated with the burner, and the other end of the ventilation pipe is communicated with the cylinder interlayer.

2. The asphalt mixture processing device according to claim 1, characterized in that: A first ring sleeve is fixedly provided at one end of the dust removal box close to the drum, and a second ring sleeve is fixedly provided at one end of the discharge box close to the drum. The first ring sleeve and the second ring sleeve correspond to the position of the drum and match in size, and the two ends of the drum are arranged in the first ring sleeve and the second ring sleeve.

3. The asphalt mixture processing device according to claim 1, characterized in that: The inclination angle of the roller is 2-6°.

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