Recycled asphalt oil fume treatment equipment

Abstract

The utility model relates to recycled asphalt oil fume treatment equipment which comprises a hot air generator and a heating roller, one end of the heating roller is connected with the hot air generator, the other end of the heating roller is connected with a primary settling chamber, a feeding hole is formed in the middle of the primary settling chamber, and a feeding chute is arranged in the primary settling chamber and is used for feeding old asphalt into the feeding hole; a settling opening is formed in the bottom of the first-stage settling chamber, a material blocking assembly is arranged above the settling opening in the first-stage settling chamber, and the material blocking assembly at least comprises one of a horizontal grid structure and a vertical blade structure; a first smoke outlet and a second smoke outlet are formed in the top of the first-stage settling chamber, the first smoke outlet is connected to the second-stage settling chamber through a first smoke pipe, and the second smoke outlet is connected with the bag-type dust collector. By means of the structural optimization design, the smoke and dust separation effect can be improved, the pitch oil smoke content is reduced, and pollution of smoke emission to the atmosphere is reduced.

Description

Technical Field

[0001] This utility model relates to the field of asphalt recycling technology, specifically to a recycled asphalt fume treatment device. Background Technology

[0002] Hot asphalt recycling equipment is used to excavate old asphalt pavement and transport it back to the mixing plant. The pavement is then crushed and the mix design is carried out according to the quality requirements of different pavement layers. The proportion of old asphalt mixture is determined, and recycling agents, new asphalt materials, and new aggregates are mixed in the mixing plant in a certain proportion to form a new mixture, thereby obtaining high-quality recycled asphalt concrete.

[0003] For example, the prior patent CN110280075B discloses a heating device and heat energy utilization method for asphalt recycling materials. In this method, the exhaust gas inside the drum is first collected by a smoke collection box, and large dust particles settle to the bottom and are discharged. The remaining exhaust gas enters the dust settling chamber through an exhaust pipe, where larger dust particles settle again. The relatively purified hot gas is then sent to a heat generator for reheating. In practice, it has been found that the smoke and dust separation function of the smoke collection box and dust settling chamber is not effective and further optimization is necessary. Utility Model Content

[0004] The purpose of this invention is to provide a recycled asphalt fume treatment device to improve the separation effect of flue gas and dust.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] The recycled asphalt fume treatment equipment includes a hot air generator and a heating drum. One end of the heating drum is connected to the hot air generator, and the other end is connected to a primary settling chamber. The primary settling chamber has a feed inlet in the middle and a feed chute inside for feeding old asphalt material into the feed inlet. The bottom of the primary settling chamber has a settling port, and a baffle assembly is provided above the settling port inside the primary settling chamber. The baffle assembly includes at least one of a horizontally placed grid structure and a vertically placed blade structure.

[0007] The top of the primary settling chamber is equipped with a first smoke outlet and a second smoke outlet. The first smoke outlet is connected to the secondary settling chamber through a first smoke pipe, and the second smoke outlet is connected to the bag filter.

[0008] Furthermore, the material blocking assembly includes a horizontally placed grid structure and a vertically placed blade structure. The blade structure is positioned facing the feed inlet, located below the grid structure, and the connection between the blade structure and the grid structure is located in the central area of ​​the grid structure.

[0009] Furthermore, the blade structure includes several blades spaced vertically apart, and the blades are inclined; the grid structure includes multiple strips arranged horizontally and vertically, and the grid structure has reserved clearance holes for the feed chute to pass through.

[0010] Furthermore, the second smoke outlet is positioned higher than the first smoke outlet, and the primary settling chamber is equipped with an airflow regulating plate assembly above the first smoke outlet to control the ventilation volume of the second smoke outlet.

[0011] Furthermore, the air volume regulating plate assembly includes several plates, each plate is fixed on a rotating shaft, the rotating shafts are arranged in parallel, and the ends of the same side of each rotating shaft are respectively hinged to the swing rods through connecting rods. The swing rods are hinged in sequence, one of the connecting rods is the driving rod, the driving rod is driven by a crank-connecting rod mechanism, and the crank-connecting rod mechanism includes a servo motor.

[0012] Furthermore, the secondary settling chamber is connected to an induced draft fan, and the outlet of the induced draft fan is connected to a hot gas generator through a second flue pipe to realize the return of exhaust gas to the hot gas generator.

[0013] The beneficial effects of this utility model are:

[0014] The present invention relates to a recycled asphalt fume treatment device, wherein the flue gas generated in the heating drum contains a large amount of dust and asphalt fume. When the flue gas passes through the blade structure designed in the primary settling chamber, it passes between adjacent blades. The inclined blades can block some of the particles, and the flue gas can be further blocked by the grid structure, thereby improving the dust separation effect.

[0015] The flue gas passes through the primary and secondary settling chambers and corresponding flue pipes, and can then be circulated into the heating drum. There, it is purified by high-temperature incineration in the heat generator and regeneration drum. This cycle effectively reduces asphalt fumes. After dust separation in the primary and secondary settling chambers and high-temperature incineration, the flue gas then enters the bag filter, meeting emission requirements before being released into the atmosphere. Attached Figure Description

[0016] Figure 1 This is a perspective view of the recycled asphalt fume treatment equipment of this utility model;

[0017] Figure 2 This is a three-dimensional diagram of the primary settlement chamber;

[0018] Figure 3 This is a cross-sectional view of the settling chamber.

[0019] Figure 4 This is a partial view of the grid structure of the primary settlement chamber;

[0020] Figure 5 This is a partial view of the air volume regulation point in the primary settling chamber.

[0021] 1. Heating drum; 2. Primary settling chamber; 20. Feed inlet; 21. First smoke outlet; 22. Second smoke outlet; 23. Air volume regulating plate assembly; 231. Servo motor; 232. Plate; 233. Short connecting rod; 234. Swing rod; 235. Long connecting rod; 236. Crank-connecting rod mechanism; 24. Blade structure; 241. Blade; 25. Grid structure; 251. Clearance hole; 26. Cover plate; 3. First smoke pipe; 4. Secondary settling chamber; 5. Exhaust fan; 6. Second smoke pipe; 7. Heat generator. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art are within the protection scope of the present utility model.

[0023] Embodiments of this utility model:

[0024] like Figures 1-5 As shown, the recycled asphalt fume treatment equipment includes a hot air generator 7 and a heating drum 1. One end of the heating drum 1 is directly connected to the hot air generator 7, and the other end is connected to a primary settling chamber 2. A feed inlet 20 is located in the middle of the primary settling chamber 2. The principle of the hot air generator 7 and the heating drum 1 is existing. The hot air generator 7 generates a high-temperature airflow that enters the rotating heating drum 1, where it exchanges heat with the material inside. The feed end of the heating drum 1 is connected to the feed inlet 20, and a discharge port is located at the lower part of the other end of the heating drum 1.

[0025] The primary settling chamber 2 is equipped with a feed chute (not shown), which is inclined and used to feed old asphalt material into the feed inlet 20. The primary settling chamber 2 is equipped with a cover plate 26, which can expose the upper part of the feed chute when opened. After feeding is completed, the cover plate 26 is closed to prevent the flue gas from overflowing at will.

[0026] The bottom of the primary settling chamber 2 is provided with a settling port. Inside the primary settling chamber 2, above the settling port, there is a baffle assembly. The baffle assembly includes a horizontally placed grid structure 25 and a vertically placed blade structure 24. The blade structure 24 is positioned directly opposite the feed inlet 20. The blade structure 24 is located below the grid structure 25, and the connection between the blade structure 24 and the grid structure 25 is located in the central area of ​​the grid structure 25.

[0027] The blade structure 24 includes a frame and several blades 241 spaced vertically. The blades 241 are inclinedly mounted on the frame, which is fixed to the inner wall of the primary settling chamber 2. The grid structure 25 includes multiple horizontally and vertically intersecting strips, forming multiple material-blocking holes. The grid structure 25 has pre-drilled clearance holes 251 for the feed chute to pass through, without affecting the installation of the feed chute. The flue gas generated inside the heating drum 1 contains a large amount of dust and asphalt fumes. When the flue gas passes through the blade structure 24, it passes through the gaps between adjacent blades 241. The inclined blades 241 can block some of the particles, and the gas further passes through the grid structure 25 for further blocking, improving the dust separation effect.

[0028] like Figures 1-2 As shown, the top of the primary settling chamber 2 is provided with a first smoke outlet 21 and a second smoke outlet 22. The first smoke outlet 21 is connected to the secondary settling chamber 4 through the first smoke pipe 3, and the second smoke outlet 22 is connected to the bag filter.

[0029] like Figure 1 As shown, the secondary settling chamber 4 is connected to an induced draft fan 5. The outlet of the induced draft fan 5 is connected to a hot gas generator 7 via a second flue pipe 6, so that the exhaust gas is returned to the hot gas generator 7. After being fully mixed with the high-temperature airflow generated by the burner in the hot gas generator 7, it re-enters the heating drum 1 to heat the material, thus ensuring the effective utilization of thermal energy. In addition, the exhaust gas is purified by high-temperature incineration in the hot gas generator 7 and the regeneration drum. This cycle can effectively reduce asphalt fumes. In this embodiment, it is referred to as exhaust gas because it is part of the flue gas.

[0030] The second smoke outlet 22 is positioned higher than the first smoke outlet 21. An airflow regulating plate assembly 23 is installed above the first smoke outlet 21 in the primary settling chamber 2 to control the ventilation volume of the second smoke outlet 22. The flue gas first passes through the airflow regulating plate assembly 23 before flowing to the second smoke outlet 22.

[0031] like Figure 5 As shown, the airflow regulating plate assembly 23 includes several plates 232, each plate 232 fixed on a rotating shaft. The rotating shafts are arranged in parallel, and the plates 232 can rotate with the shafts, thereby adjusting the spacing between adjacent plates 232 and controlling the ventilation volume. The ends of each rotating shaft on the same side are respectively hinged to a swing arm 234 via connecting rods. The swing arms 234 are sequentially hinged, with one connecting rod being the driving rod. One end of the driving rod is driven by a crank-connecting rod mechanism 236, and the other end is hinged to one end of one of the swing arms 234. The crank-connecting rod mechanism 236 includes a servo motor 231. When the servo motor 231 is activated, it drives each rotating shaft to rotate synchronously. In this embodiment, there are four connecting rods: three short connecting rods 233 and one long connecting rod 235, which is the driving rod. A swing arm 234 connects two adjacent connecting rods.

[0032] The air volume regulating plate assembly 23 can be opened after the flue gas has circulated for a certain period of time; after the flue gas undergoes preliminary dust separation in the first and second stage settling chambers and high-temperature incineration treatment, it enters the bag filter and is filtered to meet emission requirements before being discharged into the atmosphere.

Claims

1. A recycled asphalt fume treatment device, comprising a heat generator and a heating drum, wherein one end of the heating drum is connected to the heat generator and the other end is connected to a primary settling chamber, characterized in that: The primary settling chamber has a feed inlet in the middle and a feed chute inside for feeding old asphalt material into the feed inlet. The primary settling chamber has a settling outlet at the bottom and a baffle assembly above the settling outlet inside the primary settling chamber. The baffle assembly includes at least one of a horizontally placed grid structure and a vertically placed blade structure. The top of the primary settling chamber is equipped with a first smoke outlet and a second smoke outlet. The first smoke outlet is connected to the secondary settling chamber through a first smoke pipe, and the second smoke outlet is connected to the bag filter.

2. The recycled asphalt fume treatment equipment according to claim 1, characterized in that: The material blocking assembly includes a horizontally placed grid structure and a vertically placed blade structure. The blade structure is positioned facing the feed inlet and is located below the grid structure. The connection between the blade structure and the grid structure is located in the central area of ​​the grid structure.

3. The recycled asphalt fume treatment equipment according to claim 2, characterized in that: The blade structure includes several blades spaced vertically apart, and the blades are inclined; the grid structure includes multiple strips arranged horizontally and vertically, and the grid structure has reserved clearance holes for the feed chute to pass through.

4. The recycled asphalt fume treatment equipment according to claim 1, characterized in that: The second smoke outlet is positioned higher than the first smoke outlet. The primary settling chamber is equipped with an airflow regulating plate assembly above the first smoke outlet to control the ventilation volume of the second smoke outlet.

5. The recycled asphalt fume treatment equipment according to claim 4, characterized in that: The airflow regulating plate assembly includes several plates, each plate is fixed on a rotating shaft, the rotating shafts are arranged in parallel, and the ends of the same side of each rotating shaft are respectively hinged to the swing rods through connecting rods. The swing rods are hinged in sequence, one of the connecting rods is the driving rod, the driving rod is driven by a crank-connecting rod mechanism, and the crank-connecting rod mechanism includes a servo motor.

6. The recycled asphalt fume treatment equipment according to claim 1, characterized in that: The secondary settling chamber is connected to an induced draft fan, and the outlet of the induced draft fan is connected to a heat generator through a second flue pipe to realize the return of exhaust gas to the heat generator.

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