Asphalt warm mixing and modifying production device

Abstract

The utility model relates to the asphalt production field especially relates to a kind of asphalt warm mix and modified production device, including warm mix modified mixing bucket, still including the front side fixed mounting of the external water supply pipe of warm mix modified mixing bucket upper end, the lower end fixed mounting of external water supply pipe has trace water nozzle, the left side fixed mounting of warm mix modified mixing bucket upper end has flue gas collection box, the inside fixed mounting of flue gas collection box has fan, the left end fixed mounting of flue gas collection box has flue gas treatment tank, and the front end fixed mounting of flue gas treatment tank has distribution pipe;The utility model sprays trace water by trace water nozzle, asphalt mixes, forms foam structure, reduces viscosity, reduces the generation of harmful gas, uses flue gas collection mechanism to adsorb harmful gas, cooperates with spray structure and filtration structure to handle the harmful gas of asphalt warm mix and modified production, guarantees the harmful gas treatment effect of equipment, avoids harmful gas pollution workshop, affects the health status of staff.

Description

Technical Field

[0001] This utility model relates to the field of asphalt production, and in particular to an asphalt warm mixing and modification production device. Background Technology

[0002] Warm mix asphalt production and modified asphalt production are two different technological processes used to improve the workability and physical properties of asphalt. Warm mix asphalt production involves adding warm mix additives to lower the mixing temperature of the asphalt mixture, allowing it to maintain stable performance at lower temperatures while reducing energy consumption and carbon emissions. Warm mix additives are based on the principle of interfacial chemistry, using surfactants to adjust the interfacial interaction between asphalt and aggregates, enabling low-temperature construction. Modified asphalt production involves adding materials such as rubber and resin to improve asphalt performance, and is divided into physical modification and chemical modification. The asphalt warm mix modified production unit is a specialized piece of equipment used to produce warm mix modified asphalt. It is mainly used to mix asphalt, modifiers, warm mix additives, and other raw materials evenly, and to ensure that the modifiers are crushed and fully integrated with the asphalt.

[0003] For example, patent number (CN222567488U) discloses an asphalt warm mix modification production device, including: a table, a mixing drum fixedly installed at the center of the top outer surface of the table, a screen box fixedly installed on the top of the mixing drum, and a U-shaped frame fixedly installed on the top outer surface of the screen box; asphalt is added into the interior of the mixing drum through a feed pipe, and then modifiers and warm mix additives are placed into the interior of the screen box; a drive motor is turned on to drive the connecting shaft to rotate, and the rotation of the connecting shaft drives the cleaning brush, the rolling roller, the conical guide plate, the connecting plate, the scraper, and multiple mixing blades to rotate. The cleaning brush and the rolling roller are fixedly installed at the upper end of the connecting shaft and movably embedded inside the screen box. The rolling roller can crush the clumps of modifiers and warm mix additives, so that they can be better mixed with asphalt, and the cleaning brush can spread out the modifiers and warm mix additives, so that the rolling roller can crush them better.

[0004] Currently, asphalt warm mix modification production equipment generates some harmful gases during operation, but the equipment's handling of these gases is relatively weak, which easily leads to pollution of the working environment and further affects the health of workers.

[0005] Therefore, to address the above problems, an asphalt warm-mix modification production device with a harmful gas treatment mechanism can be designed. Utility Model Content

[0006] In order to overcome the problem that the asphalt warm mix modification production unit produces some harmful gases during operation, which can easily cause pollution to the working environment and further affect the health of the workers.

[0007] The technical solution of this utility model is as follows: a warm-mix asphalt modification production device, including a warm-mix modification mixing tank, an external water supply pipe fixedly installed on the front side of the upper end of the warm-mix modification mixing tank, a micro water spray nozzle fixedly installed at the lower end of the external water supply pipe, a flue gas collection box fixedly installed on the left side of the upper end of the warm-mix modification mixing tank, a fan fixedly installed inside the flue gas collection box, a flue gas treatment box fixedly installed at the left end of the flue gas collection box, a distribution pipe fixedly installed at the front end of the flue gas treatment box, the rear end of the distribution pipe extending into the interior of the flue gas treatment box, and a spray nozzle fixedly connected to its surface, a secondary purification box fixedly installed on the left side of the upper end of the flue gas treatment box, a heat-insulating and sealing shell fixedly installed on the surface of the warm-mix modification mixing tank, an annular partition plate provided between the heat-insulating and sealing shell plate and the warm-mix modification mixing tank, a connecting through hole opened on the inner side of the annular partition plate, an external liquid inlet pipe fixedly connected to the lower side of the surface of the heat-insulating and sealing shell plate, and an external liquid outlet pipe fixedly connected to the upper side of the surface of the heat-insulating and sealing shell plate.

[0008] Preferably, asphalt is added to the inside of the mixing drum through the feed pipe, and then the modifier and warm mix additive are placed inside the upper screen box. The drive motor is turned on to rotate the connecting shaft. The cleaning brush and the compaction roller are fixedly installed on the upper end of the connecting shaft. The compaction roller can crush the clumps of modifier and warm mix additive, so that they can be better mixed with asphalt. The cleaning brush can spread the modifier and warm mix additive, so that the compaction roller can crush them better. The modifier and warm mix additive fall into the inside of the mixing drum through the screen box. The stirring structure inside the warm mix modified mixing drum can improve the mixing efficiency of asphalt, so that it can be better mixed with the additive, thereby improving the quality of asphalt. Opening the control valve can take out the asphalt mixed inside the mixing drum from the discharge pipe.

[0009] Preferably, a fan is used to drive the airflow inside and outside the flue gas collection box, and a protective net is fixedly installed on the right side inside the flue gas collection box.

[0010] Preferably, an external infusion pipe is fixedly installed on the right side of the front end of the distribution pipe, the spray heads are evenly distributed, mounting plates are fixedly installed on the lower sides of both the front and rear ends of the flue gas treatment box, and mounting rings are fixedly installed on the lower side of the surface of the warm-mixing modified mixing tank.

[0011] Preferably, the lower end of the secondary purification box is connected to the flue gas treatment box, the interior of the secondary purification box is detachably connected to a dust removal and filtration module, the upper end of the secondary purification box is fixedly installed with an exhaust pipe, and the lower end of the flue gas treatment box is fixedly installed with a sewage discharge pipe.

[0012] Preferably, the inner surface of the annular partition is fixedly connected to the warm-mix modified mixing tank, and the surface of the annular partition is fixedly connected to the heat-insulating and sealing shell.

[0013] Preferably, the annular partitions are evenly spaced, and the connecting through holes are staggered.

[0014] Preferably, a feed inlet is fixedly connected to the upper side of the surface of the warm-mix modified mixing tank, and a discharge outlet is fixedly installed at the lower end of the warm-mix modified mixing tank.

[0015] The beneficial effects of this utility model are:

[0016] 1. This asphalt warm mix modification production device sprays a small amount of water through a micro-water nozzle, mixes the asphalt, forms a foam structure, reduces viscosity, and reduces the generation of harmful gases. It uses a flue gas collection mechanism to adsorb harmful gases, and works in conjunction with a spraying structure and a filtration structure to treat harmful gases produced during the asphalt warm mix modification process. The spraying of alkaline solution and the dust removal and filtration module intercept dust particles, which can work together to treat harmful gases, realize the centralized collection and filtration purification function of harmful gases, ensure the equipment's harmful gas treatment effect, and avoid harmful gas pollution in the workshop, which could affect the health of the workers.

[0017] 2. This asphalt warm mix modification production device forms a heat exchange medium flow channel on the surface of the warm mix modification mixing tank through a heat-insulating sealed shell and an annular baffle. While planning the flow trajectory of the heat exchange medium, it can maximize the heat exchange area of ​​the heat exchange medium, so that the heat exchange medium can fully adhere to the heat-insulating sealed shell, improve the heat exchange efficiency, and at the same time reduce heat loss in conjunction with the heat-insulating sealed shell, further improving the heat energy recovery and utilization rate, and also improving safety, preventing workers from being burned by contact. Attached Figure Description

[0018] Figure 1 The diagram shown is an overall structural representation of the asphalt warm mix modification production device of this utility model. Figure 1 ;

[0019] Figure 2 The diagram shown is an overall structural representation of the asphalt warm mix modification production device of this utility model. Figure 2 ;

[0020] Figure 3 The diagram shown is a schematic representation of the flue gas treatment box structure of the asphalt warm mixing modification production device of this utility model.

[0021] Figure 4 The diagram shown is a schematic representation of the structure of the warm-mix modification mixing tank in the asphalt warm-mix modification production device of this utility model.

[0022] Figure 5 The diagram shown is a schematic of the thermal insulation and sealing shell structure of the asphalt warm mixing and modification production device of this utility model.

[0023] Explanation of reference numerals in the attached diagram: 1. Warm-mixing modified mixing tank; 2. External water supply pipe; 3. Micro-water spray nozzle; 4. Flue gas collection box; 5. Fan; 6. Flue gas treatment box; 7. Distribution pipe; 8. Spray head; 9. Secondary purification box; 10. Thermal insulation and sealing shell; 11. Annular partition; 12. Connecting through hole; 13. External liquid inlet pipe; 14. External liquid outlet pipe; 15. Protective net; 16. External liquid supply pipe; 17. Discharge port; 18. Feed inlet; 19. Discharge port; 20. Sewage discharge port. Detailed Implementation

[0024] 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 without creative effort are within the protection scope of the present utility model.

[0025] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described below in conjunction with the accompanying drawings and embodiments.

[0026] Asphalt is a dark brown, complex mixture composed of hydrocarbons of varying molecular weights and their non-metallic derivatives. It is a high-viscosity organic liquid, mostly existing in liquid or semi-solid petroleum form, with a black surface, and is soluble in carbon disulfide and carbon tetrachloride. Asphalt is a waterproof, moisture-proof, and corrosion-resistant organic cementing material. Asphalt can be mainly divided into three types: coal tar pitch, petroleum asphalt, and natural asphalt. Coal tar pitch is a byproduct of coking, petroleum asphalt is the residue after crude oil distillation, and natural asphalt is stored underground, sometimes forming mineral layers or accumulating on the earth's surface. Asphalt is mainly used in the coatings, plastics, and rubber industries, as well as in road paving.

[0027] In civil engineering, asphalt is a widely used waterproofing and anti-corrosion material, primarily used for waterproofing roofs, floors, and underground structures, as well as for protecting timber and steel. Asphalt is also a widely used pavement structural binder in road engineering. When mixed with different mineral materials in specific proportions, it can create asphalt pavements with various structures, and its application is particularly widespread on highways. However, compared to the demand in the domestic market, the scale of asphalt development in China is still in a state of supply shortage, especially in the high-end modified asphalt market, which remains largely untapped. While there are many ordinary road asphalt manufacturers in my country, there are relatively few specialized asphalt manufacturers. We should gradually increase the number of specialized asphalt manufacturers to meet the growing demand in the specialized asphalt market.

[0028] Warm-mix asphalt and modified asphalt are two different technologies, but they are related. Warm-mix asphalt refers to lowering the mixing temperature of asphalt mixtures by adding surfactants while maintaining the same road performance as traditional hot-mix asphalt. Its main advantages include reduced energy consumption, reduced emissions, and shorter construction cycles. The mainstream international technology achieves this by reducing the high-temperature viscosity of asphalt mixtures through admixtures, which can lower the temperature by 20-40°C. Modified asphalt improves asphalt performance by adding materials such as rubber and resins, enhancing its anti-aging properties, adhesion, or mechanical properties. Common modifiers include polymers such as SBR and SBS, as well as anti-stripping agents and mineral fillers. Modified asphalt is often used to improve road durability and safety. The core difference between the two is that warm-mix asphalt achieves energy conservation and emission reduction by lowering the construction temperature, while modified asphalt improves asphalt performance by adding materials. Both technologies can be used independently or in combination; the appropriate solution must be selected based on project requirements (climate, load, environmental requirements).

[0029] The warm mix asphalt modification production unit is a specialized piece of equipment used to produce warm mix modified asphalt. It primarily mixes asphalt, modifiers, and warm mix additives evenly, ensuring the modifiers are crushed and fully integrated with the asphalt. Asphalt is added to the mixing tank through the feed pipe, while the modifiers and warm mix additives are placed in the sieve box. A drive motor rotates the mixing device to achieve mixing and crushing of the raw materials. The compaction rollers crush any clumps of modifiers and warm mix additives, ensuring a more uniform mixture with the asphalt. A cleaning brush assists in spreading the raw materials, improving crushing efficiency. Some units add materials such as EVA granules to improve the softening point and high-temperature rutting resistance of the asphalt, making it suitable for enhancing the durability of road materials. This equipment is applicable to asphalt production processes, especially when it is necessary to improve asphalt performance or meet special road surface material performance requirements.

[0030] The warm-mix asphalt modification production unit is a specialized piece of equipment that integrates warm-mix technology and modification processes. It is primarily used to produce high-performance asphalt mixtures at lower temperatures (30-60°C lower than traditional hot-mix processes) while achieving energy conservation and environmental protection goals. Its core principle is to reduce asphalt viscosity through physical or chemical means and add modifiers such as polymers to enhance asphalt performance. This unit represents an evolution in asphalt production towards low-carbon, high-performance methods, balancing construction feasibility, environmental benefits, and long-term durability by integrating warm-mix viscosity reduction and polymer reinforcement technologies.

[0031] Asphalt warm mix modification production units do indeed generate harmful gases during operation, mainly including volatile organic compounds (VOCs), polycyclic aromatic hydrocarbons (PAHs), benzene compounds, particulate matter, and sulfur / nitrogen compounds. The degree of harm is closely related to the production process, temperature control, and waste gas treatment level. While asphalt warm mix modification production inevitably produces harmful gases, warm mix technology can significantly reduce emissions, and the modification process relies on end-of-pipe treatment technologies to control toxic substances. Currently, the industry is gradually building a green production system through the promotion of warm mix technology, dry purification, and intelligent monitoring (such as infrared spectroscopy for SBS content detection). In the future, it is necessary to further strengthen the benzo[a]pyrene limit standards and promote biodegradation technology to achieve deep purification.

[0032] Please see Figures 1-5 This utility model provides an embodiment of an asphalt warm-mix modification production device, including a warm-mix modification mixing tank 1, an external water supply pipe 2 fixedly installed on the front side of the upper end of the warm-mix modification mixing tank 1, a micro-water spray nozzle 3 fixedly installed on the lower end of the external water supply pipe 2, a flue gas collection box 4 fixedly installed on the left side of the upper end of the warm-mix modification mixing tank 1, a fan 5 fixedly installed inside the flue gas collection box 4, a flue gas treatment box 6 fixedly installed on the left end of the flue gas collection box 4, a distribution pipe 7 fixedly installed at the front end of the flue gas treatment box 6, the rear end of the distribution pipe 7 extending into the interior of the flue gas treatment box 6, and a spray nozzle 8 fixedly connected to its surface, a secondary purification box 9 fixedly installed on the left side of the upper end of the flue gas treatment box 6, and a heat-insulating and sealing outer shell 10 fixedly installed on the surface of the warm-mix modification mixing tank 1. An annular partition 11 is provided between the heat-insulating and sealing outer shell 10 and the warm-stirring modified mixing tank 1. A connecting through hole 12 is opened on the inner side of the annular partition 11. An external liquid inlet pipe 13 is fixedly connected to the lower side of the surface of the heat-insulating and sealing outer shell 10, and an external liquid outlet pipe 14 is fixedly connected to the upper side of the surface of the heat-insulating and sealing outer shell 10. An external water supply pipe 2, together with a micro water spray nozzle 3, sprays micro water to reduce the generation of harmful gases. The fan 5 drives the harmful gases from the flue gas collection box 4 into the flue gas treatment box 6. The spray nozzle 8 sprays alkaline solution to treat the harmful gases. In conjunction with the secondary purification box 9, the harmful gases are treated in a coordinated manner, realizing the centralized collection and filtration purification function of harmful gases. This ensures the treatment effect of harmful gases of the equipment and avoids the pollution of the workshop by harmful gases, which may affect the health of the workers.

[0033] Please see Figures 1-4In this embodiment, the fan 5 is used to drive the airflow inside and outside the flue gas collection box 4. A protective net 15 is fixedly installed on the right side inside the flue gas collection box 4. An external liquid delivery pipe 16 is fixedly installed on the right side of the front end of the distribution pipe 7. The spray heads 8 are evenly distributed. Mounting plates are fixedly installed on the lower sides of both ends of the flue gas treatment box 6. An installation ring is fixedly installed on the lower side of the surface of the warm-mix modified mixing tank 1. The lower end of the secondary purification box 9 is connected to the flue gas treatment box 6. A dust removal filter module is detachably connected inside the secondary purification box 9. An exhaust pipe 17 is fixedly installed on the upper end of the secondary purification box 9. A sewage outlet 20 is fixedly installed on the lower end of the flue gas treatment box 6. The external water delivery pipe 2 can be used with the micro water spray head 3 to spray micro water (the other end of the external water delivery pipe 2 is equipped with a micro water control module, which can control the spraying of 2% micro water (water temperature 2-3℃) to mix with 150-160℃ asphalt to form foam). The mixture reduces viscosity, lowering the mixing temperature from the traditional 160–180℃ to 110–135℃, reducing VOCs release by 30–50%. Asphalt mixing forms a foam structure, further reducing viscosity and the generation of harmful gases. Fan 5 (which can be configured as a similar driving component) drives airflow, allowing harmful gases to enter the flue gas treatment box 6 from the flue gas collection box 4. An external infusion pipe 16 can supply alkaline solution. Spray heads 8 spray harmful gases. A secondary purification box 9 collaboratively treats harmful gases (the dust removal and filtration module adsorbs and intercepts some harmful substances and particles, and is easy to replace). Purified gas is discharged through the discharge port 17, and wastewater is discharged through the sewage port 20 (a control valve can be connected to the sewage port 20 to discharge impurities; after closing, the wastewater can re-enter the filtration and purification system).

[0034] Please see Figures 4-5 In this embodiment, the inner surface of the annular partition 11 is fixedly connected to the warm-stirring modified mixing tank 1, and the surface of the annular partition 11 is fixedly connected to the heat-insulating sealing shell 10. The annular partitions 11 are evenly spaced, and the connecting through holes 12 are staggered. An inlet pipe 18 is fixedly connected to the upper side of the surface of the warm-stirring modified mixing tank 1, and an outlet pipe 19 is fixedly installed at the lower end of the warm-stirring modified mixing tank 1. An external liquid inlet pipe 13 can input the heat exchange medium into the heat-insulating sealing shell 10. The annular partition 11 and the connecting through holes 12 can be connected to the warm-stirring modified mixing tank 1. A heat exchange medium flow channel is formed on the surface of the combined tank 1, which makes the heat exchange medium evenly distributed and can fully absorb excess heat. After the heat exchange is completed, the heat exchange medium is recycled by the external liquid outlet pipe 14 (the external liquid outlet pipe 14 and the external liquid inlet pipe 13 can be connected to control valves to ensure that the operation of the asphalt warm mixing and modification production device and the micro water spray head 3 will not be affected during the operation). The heat-insulating and sealing shell 10 reduces heat loss, further improves the heat energy recovery and utilization rate, and also improves safety to prevent workers from being burned.

[0035] During operation, a small amount of water is sprayed into the asphalt through the external water supply pipe 2 and the micro water nozzle 3. This mixture forms a foam structure, reducing viscosity and the generation of harmful gases. The fan 5 drives airflow, allowing the harmful gases to enter the flue gas treatment box 6 from the flue gas collection box 4. The alkaline solution supplied through the external liquid supply pipe 16 is sprayed onto the harmful gases by the spray nozzle 8. This process works in conjunction with the secondary purification box 9 to treat the harmful gases. The purified gas is then discharged through the discharge pipe 17, while the sewage discharge pipe 20 is used to discharge treated wastewater. The heat exchange medium is supplied to the heat-insulated and sealed outer shell 10 through the external liquid inlet pipe 13. The heat exchange medium flows through the annular baffle 11 and the connecting through hole 12 on the surface of the warm-mix modified mixing tank 1, ensuring uniform distribution of the heat exchange medium and facilitating its absorption of excess heat. After heat exchange is completed, the heat exchange medium is recycled through the external liquid outlet pipe 14.

[0036] Through the above steps, the external water supply pipe 2, in conjunction with the micro-water nozzle 3, sprays in a small amount of water to reduce the generation of harmful gases. The blower 5 drives the harmful gases from the flue gas collection box 4 into the flue gas treatment box 6, where the spray head 8 performs alkaline spray treatment on the harmful gases. This, combined with the secondary purification box 9, works synergistically to treat the harmful gases, achieving centralized collection and filtration purification of harmful gases. This ensures the effectiveness of the equipment in treating harmful gases, prevents harmful gases from polluting the workshop, and avoids affecting the health of the workers. This addresses the problem that the asphalt warm mixing modification production device generates some harmful gases during operation, which can easily pollute the working environment and further affect the health of the workers.

Claims

1. A warm-mix asphalt modification production apparatus, comprising a warm-mix modification mixing tank (1), characterized in that: It also includes an external water supply pipe (2) fixedly installed on the front side of the upper end of the warm-mix modified mixing tank (1), a micro water spray nozzle (3) fixedly installed at the lower end of the external water supply pipe (2), a flue gas collection box (4) fixedly installed on the left side of the upper end of the warm-mix modified mixing tank (1), a fan (5) fixedly installed inside the flue gas collection box (4), a flue gas treatment box (6) fixedly installed on the left end of the flue gas collection box (4), a distribution pipe (7) fixedly installed at the front end of the flue gas treatment box (6), and the rear end of the distribution pipe (7) extends into the interior of the flue gas treatment box (6) and its surface is fixed. A spray head (8) is fixedly connected. A secondary purification box (9) is fixedly installed on the left side of the upper end of the flue gas treatment box (6). A heat-insulating and sealing shell (10) is fixedly installed on the surface of the warm-mixing modified mixing tank (1). An annular partition (11) is provided between the heat-insulating and sealing shell (10) and the warm-mixing modified mixing tank (1). A connecting through hole (12) is opened on the inner side of the annular partition (11). An external liquid inlet pipe (13) is fixedly connected to the lower side of the surface of the heat-insulating and sealing shell (10). An external liquid outlet pipe (14) is fixedly connected to the upper side of the surface of the heat-insulating and sealing shell (10).

2. The asphalt warm mix modification production device according to claim 1, characterized in that: The fan (5) is used to drive the air flow inside and outside the flue gas collection box (4). A protective net (15) is fixedly installed on the right side inside the flue gas collection box (4).

3. The asphalt warm mixing modification production device according to claim 1, characterized in that: An external infusion pipe (16) is fixedly installed on the right side of the front end of the distribution pipe (7). Spray heads (8) are distributed at equal intervals. Mounting plates are fixedly installed on the lower sides of both ends of the flue gas treatment box (6). Mounting rings are fixedly installed on the lower side of the surface of the warm mixing modified mixing tank (1).

4. The asphalt warm mix modification production apparatus according to claim 3, characterized in that: The lower end of the secondary purification box (9) is connected to the flue gas treatment box (6). The interior of the secondary purification box (9) is detachably connected to a dust removal and filtration module. The upper end of the secondary purification box (9) is fixedly installed with an exhaust pipe (17), and the lower end of the flue gas treatment box (6) is fixedly installed with a sewage discharge pipe (20).

5. The asphalt warm mix modification production device according to claim 1, characterized in that: The inner surface of the annular partition (11) is fixedly connected to the warm-mix modified mixing tank (1), and the surface of the annular partition (11) is fixedly connected to the heat-insulating and sealing shell (10).

6. The asphalt warm mix modification production apparatus according to claim 5, characterized in that: The annular partitions (11) are evenly spaced, and the connecting through holes (12) are staggered.

7. The asphalt warm mix modification production apparatus according to claim 1, characterized in that: A feed inlet (18) is fixedly connected to the upper side of the surface of the warm-mixing modified mixing tank (1), and a discharge outlet (19) is fixedly installed at the lower end of the warm-mixing modified mixing tank (1).

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