Warm mix asphalt modifier reaction kettle
By integrating crushing components, micro-powder feeding components, and liquid feeding components, the problem of slow melting speed and poor mixing uniformity of large particles in the warm-mix asphalt modifier reactor was solved, achieving rapid melting and uniform dispersion of materials, thus improving preparation efficiency and product quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- MEISHAN TIANYIBO NEW MATERIAL TECHNOLOGY CO LTD
- Filing Date
- 2025-05-26
- Publication Date
- 2026-05-01
AI Technical Summary
In the existing warm-mix asphalt modifier reactor, the melting rate of larger SBS particles is slow during the preparation process, and the mixing uniformity between molten SBS and solid montmorillonite and other components is poor.
A warm-mix asphalt modifier reactor was designed, integrating a crushing component, a micro powder feeding component, and a liquid feeding component. The valve opening and closing is controlled by a negative pressure device to achieve rapid crushing and uniform addition of large particles, suspension and dispersion of micro powder, and high-pressure injection mixing of liquid components, ensuring uniform mixing of all components in the reactor.
It enables rapid melting of large particles and uniform dispersion of micro powder and liquid components, thereby improving the preparation efficiency and product quality stability of warm-mix asphalt modifiers.
Smart Images
Figure CN224180887U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of chemical production equipment technology, specifically to a warm-mix asphalt modifier reaction vessel. Background Technology
[0002] Warm mix asphalt modifiers, also known as asphalt warm mix additives, are modifiers added during the asphalt mixing process. They can reduce the viscosity of asphalt at high temperatures to increase the workability of the mixture, enabling mixing and compaction at lower temperatures, while ensuring that the road performance of the asphalt is not reduced and will not have a negative impact on the performance of asphalt pavement.
[0003] Currently, warm-mix asphalt modifiers can be classified into three types based on their modification mechanisms: First, organic viscosity-reducing modifiers, whose core components are low-melting-point organic viscosity reducers (such as long-chain aliphatic hydrocarbons, fatty amides, lignite wax, etc.). By adding these low-melting-point organic viscosity reducers to asphalt, better mixing viscosity and performance are achieved at lower temperatures. Second, foaming viscosity-reducing modifiers, whose core components include aluminosilicate zeolites. Their mechanism of action involves utilizing their large porosity and high specific surface area to absorb water up to one-quarter of their mass, which then boils under heating conditions. The water in the pores of the aggregate will slowly escape, causing the asphalt to foam and forming foamed asphalt, thereby reducing the viscosity of the asphalt. The third is the emulsified modifier, whose core component is a surfactant. Its mechanism of action is that during the mixing process, a large number of surfactant micelles come into contact with hot asphalt. The water molecules around the micelles evaporate and dissipate rapidly, allowing the lipophilic groups to come into contact with the asphalt. The remaining water molecules combine with the hydrophilic groups of the surfactant, thereby forming a large number of structural water films with lubricating function between the asphalt coating the aggregate. Through the lubricating effect of the structural water film, the workability of the mixing is greatly increased.
[0004] In actual production, warm mix asphalt modifiers, in addition to the common warm mix agent components mentioned above, also include other asphalt modifying components, such as SBS and rubber powder used to improve the weather resistance of asphalt, sulfur used as a crosslinking agent to react with SBS, antioxidants to inhibit asphalt oxidation, and so on.
[0005] Warm-mix asphalt modifiers, composed of SBS, sulfur, antioxidants, porous silicates (such as kaolin, diatomaceous earth, montmorillonite, etc.), surfactants, and solubilizers, are a common type of composite asphalt modifier. The raw materials for this modifier include granular SBS with a particle size of up to 500 μm, powdered sulfur with a particle size of only about 10 μm, powdered montmorillonite (or other porous silicates) with a particle size of only about 1~5 μm, and liquid or solid powdered surfactants and solubilizers. When preparing this composite asphalt modifier, these components need to be mixed evenly and heated to react. When the temperature reaches about 160℃, SBS melts and undergoes a cross-linking reaction under the action of sulfur as a cross-linking agent. In the actual preparation process, the following problems exist when using the existing reaction vessel: (1) The melting speed of larger SBS particles is slower when the temperature of the reaction vessel increases; (2) The mixing uniformity between molten SBS, solid montmorillonite (or other porous silicates), and other liquid components is poor.
[0006] To solve the above technical problems, it is necessary to design a warm-mix asphalt modifier reaction vessel. Utility Model Content
[0007] The purpose of this invention is to provide a warm-mix asphalt modifier reactor to achieve rapid heating of large particle materials.
[0008] To achieve the above objectives, this utility model is implemented through the following technical solution:
[0009] A warm-mix asphalt modifier reactor includes a reactor body and a stirring assembly. The heat-insulated plate stirring assembly includes a stirring shaft and stirring blades, and further includes a crushing assembly, a micro powder feeding assembly, and a liquid feeding assembly. The heat-insulated plate crushing assembly includes a crushing box fixedly installed on the top of the heat-insulated plate reactor body, a crushing shaft installed inside the heat-insulated plate crushing box, and a set of crushing blades fixed to the heat-insulated plate crushing shaft. A crushing inlet is provided at the top of the heat-insulated plate crushing box, and a crushing outlet is provided at the bottom of the heat-insulated plate crushing box. The heat-insulated plate crushing outlet is located inside the heat-insulated plate reactor body. A first valve is provided at the heat-insulated plate crushing outlet, and the heat-insulated plate reactor body is equipped with a valve control assembly for controlling the opening and closing of the first valve of the heat-insulated plate.
[0010] Preferably, the heat insulation plate valve control assembly includes a negative pressure device, and the first valve of the heat insulation plate is opened and closed by negative pressure; the heat insulation plate negative pressure device includes a vacuum pump and a vacuum pipeline connected to the heat insulation plate vacuum pump, and a negative pressure head is provided at the end of the heat insulation plate vacuum pipeline away from the heat insulation plate vacuum pump. The heat insulation plate negative pressure head is located inside the heat insulation plate vessel and is located below the heat insulation plate crushing outlet and near the top of the heat insulation plate vessel; a micro powder filter assembly is provided on the side of the heat insulation plate negative pressure head away from the wall of the heat insulation plate vessel; the heat insulation plate vessel is also equipped with a pressure balancing valve.
[0011] Preferably, the heat insulation negative pressure device is also equipped with a back-blowing device, which includes an air compressor and a back-blowing pipe. One end of the heat insulation back-blowing pipe is connected to the heat insulation air compressor, and the other end is connected to the heat insulation negative pressure head.
[0012] Preferably, the heat insulation plate micro powder feeding assembly includes a suspension chamber fixedly disposed at the top of the heat insulation plate vessel and a blower for blowing air into the heat insulation plate suspension chamber; a micro powder inlet is provided at the top of the heat insulation plate suspension chamber, a micro powder outlet is provided at the bottom of the heat insulation plate suspension chamber, a second valve is provided between the heat insulation plate micro powder inlet and the heat insulation plate suspension chamber; a third valve is provided at the heat insulation plate micro powder outlet, and the opening and closing of the third valve is controlled by the heat insulation plate valve control assembly.
[0013] Preferably, the outlet of the heat insulation plate micro powder is connected to a funnel-shaped cover, with the heat insulation plate cover facing the bottom of the heat insulation plate vessel.
[0014] Preferably, the heat insulation plate liquid feeding assembly includes an annular feed pipe, multiple nozzles evenly arranged on the annular feed pipe, and a liquid supply device for supplying high-pressure liquid to the annular feed pipe; the annular feed pipe is arranged close to the inner wall of the heat insulation plate vessel; and the annular feed pipe is arranged near the bottom of the heat insulation plate vessel.
[0015] Preferably, the heat insulation plate liquid supply device includes a liquid storage tank, a liquid supply pipe and a liquid pump; one end of the heat insulation plate liquid supply pipe is connected to the heat insulation plate liquid storage tank and the other end is connected to the heat insulation plate annular feed pipe; the heat insulation plate liquid supply device also includes a high-pressure gas source and a high-pressure gas pipe, and the heat insulation plate high-pressure gas source is connected to the heat insulation plate liquid supply pipe through the heat insulation plate high-pressure gas pipe.
[0016] Preferably, the nozzle of the heat insulation plate is oriented in the same direction as the stirring shaft of the heat insulation plate.
[0017] Preferably, the outer wall of the insulated plate reactor is equipped with a heat-conducting oil pipe, and an insulated plate is installed inside the insulated plate reactor. The insulated plate is located at the bottom of the insulated plate crushing box to separate the upper part and the lower part of the insulated plate reactor. The heat-conducting oil pipe is located on the outer wall of the insulated plate reactor below the insulated plate.
[0018] Preferably, the heat insulation plate crushing box and the heat insulation plate suspension chamber are both fixed to the heat insulation plate; the heat insulation plate cover and the heat insulation plate crushing outlet are both located on the side of the heat insulation plate near the bottom of the heat insulation plate vessel; the heat insulation plate negative pressure head and the heat insulation plate pressure balancing valve are both located on the side of the heat insulation plate near the bottom of the heat insulation plate vessel.
[0019] The present invention has the following advantages over the prior art:
[0020] (1) This utility model integrates a crushing component on the reactor body to crush large particles (such as SBS) and then add them into the reactor body, which facilitates the rapid melting and reaction of such materials. The third valve of the crushing outlet is controlled by the valve control component to realize the intermittent entry of materials into the reactor body. The materials that enter the reactor body first can melt quickly, and the materials that enter the reactor body later directly enter the melt, further accelerating the melting of the materials added later.
[0021] (2) This utility model uses a valve control component controlled by a negative pressure device to provide periodic negative pressure, which enables the third valve to open and close periodically. At the same time, the negative pressure can also be used to achieve uniform dispersion of powder entering the reactor.
[0022] (3) This utility model integrates a micro powder feeding component on the reactor body to achieve uniform dispersion of micro powder materials. The micro powder first enters the suspension chamber and is dispersed in the suspension chamber by a blower to avoid micro powder agglomeration. Then, the periodic negative pressure of the valve control component makes the suspended micro powder further dispersed to the surface of the melt in the reactor body under the negative pressure, and further uniformly dispersed into the melt body with stirring.
[0023] (4) The liquid feeding assembly of this utility model provides a high-pressure gas-liquid mixture into the annular feed pipe through the action of a liquid pump and a high-pressure gas source. The gas-liquid mixture is sprayed into the melt in the reactor body through the nozzle on the annular feed pipe, so as to achieve rapid and uniform mixing with the melt. Attached Figure Description
[0024] Figure 1 This is a schematic diagram of the internal structure of the warm-mix asphalt modifier reactor of this utility model.
[0025] Figure 2 This is a schematic diagram of the structure of the warm-mix asphalt modifier reactor of this utility model.
[0026] Figure 3 This is a schematic diagram of the relevant parts of the crushing component and the micro powder feeding component of the warm-mix asphalt modifier reactor of this utility model.
[0027] Figure 4 This is a top view of the annular feed tube of this utility model.
[0028] Figure label:
[0029] 10-Tank body, 11-Agitator shaft, 12-Agitator blade, 13-Heat transfer oil pipe, 14-Insulation layer, 15-Insulation plate, 20-Crushing assembly, 21-Crushing box, 22-Crushing feed inlet, 23-Crushing shaft, 24-Crushing blade assembly, 25-Crushing discharge outlet, 26-First valve, 30-Valve control assembly, 31-Vacuum pump, 32-Vacuum pipeline, 33-Negative pressure head, 34-Filter bag, 35-Air compressor, 36-Backflush pipeline 37-Vacuum valve, 38-Backflush valve, 39-Pressure balance valve, 40-Micro powder feeding assembly, 41-Suspension chamber, 42-Micro powder inlet, 43-Micro powder outlet, 44-Second valve, 45-Third valve, 46-Blower, 47-Cover, 50-Liquid feeding assembly, 51-Annular feed pipe, 52-Nozzle, 53-Liquid storage tank, 54-Liquid supply pipe, 55-Liquid pump, 56-High-pressure air source, 57-High-pressure air pipe. Detailed Implementation
[0030] The specific implementation method is described below with reference to the accompanying drawings.
[0031] Reference Figures 1-4 This embodiment provides a warm-mix asphalt modifier reactor, including a reactor body 10 and a stirring assembly. The stirring assembly includes a stirring shaft 11 and stirring blades 12, and also includes a crushing assembly 20, a micro powder feeding assembly 40 and a liquid feeding assembly 50.
[0032] The crushing component 20 is mainly used for the preliminary crushing of larger SBS or rubber particles, and the crushed particles are directly fed into the reactor. Compared with the separate design of the crushing device and the reactor, integrating the crushing component 20 into the reactor can avoid excessive pipeline design. In the preparation of warm-mix asphalt modifier, the requirements for the crushing results of SBS or rubber particles are not strict. It is only necessary to facilitate faster heating and melting after they enter the reactor body 10. The crushing component 20 integrated into the reactor can achieve the above requirements without excessive additional equipment investment.
[0033] The micro powder feeding component 40 is mainly used for feeding micron-level powders such as sulfur powder and montmorillonite powder, which enables these powder materials to enter the reactor body 10 evenly.
[0034] The liquid feed assembly 50 is mainly used for feeding liquid components or components added in the form of aqueous solutions. These components can be fed through the liquid feed assembly 50 and can be mixed more evenly in the melt inside the vessel body 10.
[0035] This embodiment mainly achieves the uniform addition of various components during the preparation of warm-mix asphalt modifier through the design of the above-mentioned crushing component 20, micro powder feeding component 40 and liquid feeding component 50, ultimately achieving efficient reaction and efficient dispersion.
[0036] The three main components of this embodiment will be described in detail below:
[0037] Regarding crushing component 20:
[0038] The crushing assembly 20 in this embodiment includes a crushing box 21 fixedly disposed on the top of the vessel body 10, a crushing shaft 23 disposed inside the crushing box 21, and a crushing blade assembly 24 fixed to the crushing shaft 23; a crushing inlet 22 is disposed on the top of the crushing box 21, and a crushing outlet 25 is disposed on the bottom of the crushing box 21, the crushing outlet 25 being located inside the vessel body 10; a first valve 26 is disposed on the crushing outlet 25, and the vessel body 10 is equipped with a valve control assembly 30 for controlling the opening and closing of the first valve 26.
[0039] In practical use, the crushing inlet 22 can be directly connected to the SBS storage tank, allowing large SBS particles to be added into the crushing chamber 21. Part of the crushing chamber 21 is located inside the vessel body 10, and part is located outside. If necessary, it can be entirely located inside the vessel body 10 for better integration of the entire equipment. After the large particles are added to the crushing chamber 21, the crushing shaft 23 rotates, which in turn drives the crushing blade assembly 24 to rotate, thereby crushing the large particles. After a certain crushing time (designed according to actual production needs), the valve control component 30 controls the first valve 26 to open, and the crushed material is discharged from the crushing outlet 25 into the vessel body 10. In this embodiment, both the feeding and discharging of the crushing chamber 21 are intermittent to ensure that the material entering the crushing chamber 21 achieves the set crushing effect.
[0040] This embodiment achieves the periodic crushing-discharge process in the crushing box 21 by periodically opening and closing the first valve 26. Periodic feeding also allows the material that enters first to melt faster, and the material that enters later to directly enter the melt, thereby accelerating the overall melting rate of the material.
[0041] Specifically, the valve control assembly 30 in this embodiment includes a negative pressure device, and the first valve 26 is controlled to open and close by negative pressure. The negative pressure device includes a vacuum pump 31 and a vacuum pipe 32 connected to the vacuum pump 31. A negative pressure head 33 is provided at the end of the vacuum pipe 32 away from the vacuum pump 31. The negative pressure head 33 is located inside the vessel body 10, below the crushing discharge port 25 and near the top of the vessel body 10. By setting the vacuum pump 31 to periodically draw negative pressure, the negative pressure inside the vessel body 10 increases periodically. When the vacuum degree inside the vessel body 10 reaches a certain set value, the first valve 26 opens, and the crushed material enters the vessel body 10 through the crushing discharge port 25. In this embodiment, the first valve 26 can be a pneumatic diaphragm valve, which is driven to open by the pressure difference between the inside and outside of the crushing chamber 21 generated by the negative pressure; the first valve 26 can also be an electromagnetic pulse valve, which is energized by the electronic control system triggered by the negative pressure to generate electromagnetic force to open the valve core.
[0042] By opening and closing the first valve 26 through the negative pressure device, the periodic negative pressure is easier to control. More importantly, the negative pressure adsorption method adsorbs the pulverized powder into the kettle body 10, which can cause airflow disturbance in the powder, making the powder distribution more uniform and avoiding powder agglomeration.
[0043] Of course, in order to prevent the powder from being adsorbed into the vacuum pipe 32 by the negative pressure, this embodiment also provides a micro powder filter component on the side of the negative pressure head 33 away from the wall of the vessel body 10; specifically, a filter bag 34 capable of filtering micro powder is selected.
[0044] In this embodiment, the vessel body 10 is also equipped with a pressure balancing valve 39. After the material in the crushing box 21 is discharged, the negative pressure is stopped, and a pressure difference exists between the inside of the vessel body 10 and the outside air pressure. The outside gas will enter the vessel body 10 through the pressure balancing valve 39, so that there is no pressure difference between the inside and outside of the vessel body 10, and the first valve 26 is closed. Alternatively, the pressure balancing valve 39 can also be a breather valve. The negative pressure head 33 and the pressure balancing valve 39 are respectively located on two opposite sides of the vessel body 10.
[0045] When a large amount of dust accumulates on the filter bag 34, it will seriously affect the operation of the negative pressure device. Therefore, the negative pressure device in this embodiment is also equipped with a back-flushing device. The back-flushing device includes an air compressor 35 and a back-flushing pipe 36. One end of the back-flushing pipe 36 is connected to the air compressor 35, and the other end is connected to the negative pressure head 33. A vacuum valve 37 is provided on the vacuum pipe 32, and a back-flushing valve 38 is provided on the back-flushing pipe 36. By periodically closing the vacuum valve 37 and opening the back-flushing valve 38, air is periodically blown onto the back of the filter bag 34 through the negative pressure head 33, so that the dust adsorbed on the filter bag 34 enters the vessel body 10.
[0046] Regarding the micro powder feeding component 40:
[0047] The micro powder feeding assembly 40 of this embodiment includes a suspension chamber 41 fixedly disposed on the top of the vessel body 10 and a blower 46 for blowing air into the suspension chamber 41; a micro powder inlet 42 is provided at the top of the suspension chamber 41 and a micro powder outlet 43 is provided at the bottom of the suspension chamber 41; a second valve 44 is provided between the micro powder inlet 42 and the suspension chamber 41; a third valve 45 is provided at the micro powder outlet 43, and the third valve 45 is controlled to open and close by the valve control assembly 30.
[0048] Because the montmorillonite, sulfur, and other micro-powders in the warm-mix asphalt modifier have small particle sizes, direct addition to the reactor body 10 will inevitably cause agglomeration, making it difficult to disperse again under the action of the stirring components within the reactor body 10. Therefore, in this embodiment, a suspension chamber 41 is first set at the top of the reactor body 10. The suspension chamber 41 can be partially located inside the reactor body 10 and partially located outside the reactor body 10. After the powder material enters the suspension chamber 41, air is blown into the suspension chamber 41 by the blower 46, so that the powder material in the suspension chamber 41 is in a suspended state, preventing it from entering the reactor body 10 in an agglomerated state. In this embodiment, the third valve 45 at the micro powder outlet 43 in the suspension chamber 41 is also controlled by the valve control component 30 that controls the opening and closing of the first valve 26. That is, after the negative pressure device draws negative pressure into the reactor body 10 through the negative pressure head 33, both the first valve 26 and the third valve 45 are opened. The crushed powder and the micro powder suspended in the suspension chamber 41 will enter the reactor body 10 as the valves are opened. Due to the presence of negative pressure, the powder entering the reactor body 10 is in a dispersed state and will not agglomerate.
[0049] Similarly, the suspension chamber 41 serves as a buffer chamber for the addition of micro powder materials, which also enables the intermittent addition of micro powder materials. After opening the second valve 44, the micro powder is added into the suspension chamber 41. Then, the second valve 44 is closed, and the air is blown to suspend the material in the suspension chamber 41. Then, the third valve 45 is opened to allow the suspended micro powder to enter the reactor body 10.
[0050] It should be noted that in actual use, sulfur and montmorillonite powder raw materials need to be added through the suspension chamber 41. The suspension chamber 41 can be equipped with multiple powder inlets 42 to accommodate various materials. Of course, multiple powder materials can also be added to the suspension chamber 41 simultaneously for preliminary mixing.
[0051] Since the proportion of micro powder in the whole warm-mix asphalt modifier is small, a portion of SBS crushed powder is often added first, and after the melt is formed inside the reactor 10, micro powder is added to the suspension chamber 41. Then, the third valve 45 is opened to allow the micro powder to enter the reactor 10. After entering the reactor 10, the micro powder first enters the surface of the melt, and then disperses evenly throughout the melt with stirring.
[0052] Preferably, in this embodiment, the micro powder outlet 43 is connected to a trumpet-shaped cover 47, with the cover 47 facing the bottom of the reactor body 10. The powder material is better dispersed on the surface of the melt inside the reactor body 10 by the converging effect of the cover 47, thus avoiding drifting to the wall of the reactor body 10.
[0053] Regarding liquid feed assembly 50:
[0054] The liquid feeding assembly 50 of this embodiment includes an annular feeding pipe 51, multiple nozzles 52 uniformly arranged on the annular feeding pipe 51, and a liquid supply device for supplying high-pressure liquid to the annular feeding pipe 51; the annular feeding pipe 51 is disposed close to the inner wall of the vessel body 10; and the annular feeding pipe 51 is disposed near the bottom of the vessel body 10. The annular feeding pipe 51 is fixed to the inner wall of the vessel body 10 by a snap fastener.
[0055] Through the annular feed pipe 51 set at the bottom of the reactor around the stirring blade 12, the liquid material is jetted into the melt through the nozzle 52 of the annular feed pipe 51, which can better mix with the melt.
[0056] Specifically, the liquid supply device includes a liquid storage tank 53, a liquid supply pipe 54, and a liquid pump 55; one end of the liquid supply pipe 54 is connected to the liquid storage tank 53, and the other end is connected to the annular feed pipe 51. In order to make the discharge jet pressure of the nozzle 52 greater and avoid the nozzle 52 from clogging, the liquid supply device in this embodiment also includes a high-pressure gas source 56 and a high-pressure gas pipe 57. The high-pressure gas output from the high-pressure gas source 56 mixes with the liquid in the liquid supply pipe 54 to form a high-pressure gas-liquid mixture, which can better allow the liquid to be injected into the melt.
[0057] Preferably, the nozzle 52 is oriented in the same direction as the stirring shaft 11. The sprayed liquid can be quickly and evenly mixed as the stirring shaft 11 rotates.
[0058] In this embodiment, the outer wall of the vessel body 10 is provided with a heat-conducting oil pipe 13, and the interior of the vessel body 10 is provided with a heat insulation plate 15. The heat insulation plate 15 is located at the bottom of the crushing box 21 to separate the upper part and the lower part of the vessel body 10. The heat-conducting oil pipe 13 is located on the outer wall of the vessel body 10 below the heat insulation plate 15.
[0059] During the preparation of warm-mix asphalt modifier, SBS needs to be melted and cross-linked at a high temperature of 160℃. Therefore, the reactor in this embodiment is heated by a heat-conducting oil pipe 13, and an insulation layer 14 is provided outside the heat-conducting oil pipe 13. At the same time, this embodiment also provides a heat insulation plate 15 near the top of the reactor body 10 to prevent the SBS material inside the crushing box 21 from softening due to excessively high temperature in the upper part of the reactor body 10, which would increase the difficulty of crushing and discharging. Similarly, in order to maintain different temperatures in the upper and lower parts of the reactor body 10, the heat-conducting oil pipe 13 is only located at the bottom of the reactor body 10. If necessary, the upper part of the reactor body 10 also needs gas or liquid circulation cooling to prevent the temperature in the crushing box 21 from becoming too high.
[0060] Due to the violent rotation of the stirring shaft 11 in the crushing box 21 and the presence of gas pressure in the suspension chamber 41, the fixation of both the crushing box 21 and the suspension chamber 41 requires high precision. In this embodiment, both the crushing box 21 and the suspension chamber 41 are fixed to the heat insulation plate to ensure the stability of the equipment operation.
[0061] The cover 47 and the crushing outlet 25 are both located on the side of the heat insulation plate 15 near the bottom of the vessel body 10; the negative pressure head 33 and the pressure balancing valve 39 are both located on the side of the heat insulation plate 15 near the bottom of the vessel body 10; with this structural layout, after the material is activated by the negative pressure to start the first valve 26 and the third valve 45, it can quickly enter the bottom of the vessel body 10 or the surface of the melt, reducing the residence time of the material in the vessel body 10 and avoiding sticking to the wall.
[0062] In summary, the warm-mix asphalt modifier reactor of this embodiment can initially crush large particles, rapidly heat the materials, and ensure uniform dispersion of micro powder and liquid materials within the system, resulting in a final product with uniform quality and stable composition.
Claims
1. A warm-mix asphalt modifier reaction vessel, comprising a vessel body and a stirring assembly, wherein the stirring assembly includes a stirring shaft and stirring blades, characterized in that, It also includes crushing components, micro powder feeding components, and liquid feeding components; The crushing assembly includes a crushing box fixedly installed on the top of the vessel body, a crushing shaft installed inside the crushing box, and a set of crushing blades fixed to the crushing shaft; a crushing inlet is provided at the top of the crushing box, a crushing outlet is provided at the bottom of the crushing box, and the crushing outlet is located inside the vessel body; a first valve is provided at the crushing outlet, and the vessel body is equipped with a valve control assembly for controlling the opening and closing of the first valve.
2. The warm-mix asphalt modifier reactor according to claim 1, characterized in that, The valve control assembly includes a negative pressure device, and the first valve is controlled to open and close by negative pressure. The negative pressure device includes a vacuum pump and a vacuum pipe connected to the vacuum pump. A negative pressure head is provided at the end of the vacuum pipe away from the vacuum pump. The negative pressure head is located inside the vessel and is located below the crushing outlet and near the top of the vessel. A micro-powder filter assembly is provided on the side of the negative pressure head away from the vessel wall; The vessel body is also equipped with a pressure balancing valve.
3. The warm-mix asphalt modifier reactor according to claim 2, characterized in that, The negative pressure device is also equipped with a backflush device, which includes an air compressor and a backflush pipe. One end of the backflush pipe is connected to the air compressor, and the other end is connected to the negative pressure head.
4. The warm-mix asphalt modifier reactor according to claim 3, characterized in that, The micro powder feeding assembly includes a suspension chamber fixedly disposed at the top of the reactor body and a blower for blowing air into the suspension chamber. The top of the suspension chamber is provided with a micro powder inlet, the bottom of the suspension chamber is provided with a micro powder outlet, and a second valve is provided between the micro powder inlet and the suspension chamber; the micro powder outlet is provided with a third valve, which is controlled to open and close by the valve control component.
5. The warm-mix asphalt modifier reactor according to claim 4, characterized in that, The micro powder outlet is connected to a funnel-shaped cover, which faces the bottom of the reactor.
6. The warm-mix asphalt modifier reactor according to any one of claims 1 to 5, characterized in that, The liquid feeding assembly includes an annular feed pipe, multiple nozzles evenly arranged on the annular feed pipe, and a liquid supply device for supplying high-pressure liquid to the annular feed pipe. The annular feed pipe is disposed close to the inner wall of the vessel; and the annular feed pipe is disposed near the bottom of the vessel.
7. The warm mix asphalt modifier reaction kettle of claim 6, wherein, The liquid supply device includes a liquid storage tank, a liquid supply pipe, and a liquid pump; one end of the liquid supply pipe is connected to the liquid storage tank, and the other end is connected to the annular feed pipe; the liquid supply device also includes a high-pressure gas source and a high-pressure gas pipe, and the high-pressure gas source is connected to the liquid supply pipe through the high-pressure gas pipe.
8. The warm-mix asphalt modifier reactor according to claim 7, characterized in that, The nozzle is oriented in the same direction as the stirring shaft.
9. The warm mix asphalt modifier reaction kettle of claim 5, wherein, The outer wall of the vessel is equipped with a heat-conducting oil pipe, and the inside of the vessel is provided with a heat insulation plate. The heat insulation plate is located at the bottom of the crushing box to separate the upper part and the lower part of the vessel. The heat-conducting oil pipe is located on the outer wall of the vessel below the heat insulation plate.
10. The warm mix asphalt modifier reaction kettle of claim 9, wherein, The crushing chamber and the suspension chamber are both fixed to the heat insulation plate; the cover and the crushing outlet are both located on the side of the heat insulation plate near the bottom of the vessel; the negative pressure head and the pressure balancing valve are both located on the side of the heat insulation plate near the bottom of the vessel.