Three-dimensional batching system for preparing high polymer modified asphalt

Abstract

The utility model relates to a three-dimensional batching system for preparing high polymer modified asphalt, and relates to the field of asphalt preparation, the three-dimensional batching system comprises a heat exchanger, a reference asphalt feeding pump, a high polymer crusher, a dispersion machine, a modified asphalt kneading machine, a batching tank, a modified asphalt discharging pump and a homogenizer, the feeding port of the dispersion machine is connected with the discharging port of the high polymer crusher, and the discharging port of the high polymer crusher is connected with the homogenizer; the discharging hole is connected with a first feeding hole of the modified asphalt kneading machine; the output end of the heat exchanger is connected with the input end of the reference asphalt feeding pump; the output end of the reference asphalt feeding pump is respectively connected with a second feeding hole of the modified asphalt kneading machine and a first feeding hole of the batching tank; a second feed port of the batching tank is connected with a discharge port of the modified asphalt kneading machine, the discharge port of the batching tank is connected with the input end of the modified asphalt discharge pump, and the output end of the modified asphalt discharge pump is connected with the homogenizer. According to the invention, the high polymer SBS is crushed at one time, crushed particles and rubber powder can be uniformly dissolved in preheated matrix asphalt, the production efficiency is improved, and the electric energy consumption is reduced.

Description

Technical Field

[0001] This application relates to the field of asphalt preparation, and in particular to a three-dimensional batching system for preparing polymer-modified asphalt. Background Technology

[0002] In the production process of waterproof membrane based on polymer-modified bitumen, the batching of polymer-modified bitumen is a crucial step. Related technologies involve a modified bitumen production batching system including: a bitumen pump, a vertical batching cylinder, a lifting feeder, a modified adhesive powder feeder, and a colloid mill. Specifically, the bitumen pump delivers the base bitumen to the vertical batching cylinder. The polymer styrene-butadiene-styrene (SBS) is fed into the colloid mill via the lifting feeder and, after being ground and dispersed 2-3 times, is also fed into the vertical batching cylinder. The modified adhesive powder is added to the colloid mill via the modified adhesive powder feeder, ground, and then fed into the vertical batching cylinder. The high-speed stirring in the vertical batching cylinder physically disperses the base bitumen, ground SBS, and adhesive powder evenly, thus producing the polymer-modified bitumen. However, this modified asphalt production batching system requires at least 2-3 passes through a colloid mill to grind the SBS polymer into fine particles, allowing it to physically dissolve in the base asphalt. The higher the amount of SBS polymer added, the more passes of the colloid mill are needed. Furthermore, unground SBS polymer particles severely affect the appearance of the subsequently prepared waterproof membrane. Additionally, the high-speed mixing and multiple grinding processes consume a significant amount of time, leading to excessive energy consumption, reduced production efficiency, and wasted resources. Utility Model Content

[0003] In order to reduce the number of grinding cycles of polymer SBS, reduce the impact of unground polymer SBS particles on the appearance of waterproof membrane, and reduce power consumption and improve production efficiency, this application provides a three-dimensional batching system for preparing polymer-modified bitumen.

[0004] This application provides a three-dimensional batching system for preparing polymer-modified asphalt, which adopts the following technical solution:

[0005] A three-dimensional batching system for preparing polymer-modified asphalt includes: a heat exchanger, a reference asphalt feed pump, a polymer crusher, a disperser, a modified asphalt kneader, a batching tank, a modified asphalt discharge pump, and a homogenizer, wherein...

[0006] The discharge port of the polymer crusher is connected to the feed port of the disperser;

[0007] The discharge port of the disperser is connected to the first feed port of the modified asphalt kneader;

[0008] The output end of the heat exchanger is connected to the input end of the reference asphalt feed pump;

[0009] The output end of the reference asphalt feed pump is connected to the second inlet of the modified asphalt kneader and the first inlet of the batching tank, respectively.

[0010] The discharge port of the modified asphalt kneader is connected to the second inlet of the batching tank;

[0011] The discharge port of the batching tank is connected to the input end of the modified asphalt discharge pump, and the output end of the modified asphalt discharge pump is connected to the input end of the homogenizer.

[0012] Optionally, the disperser includes a conical disperser.

[0013] Optionally, the kneader and the batching tank are respectively connected to the base asphalt supply pump via heating pipes.

[0014] Optionally, the kneader is connected to the ingredient tank via a heating pipe.

[0015] Optionally, the homogenizer is also connected to an external waterproof membrane production line coating tank, which transports the homogenized polymer-modified bitumen to the waterproof membrane production line coating tank for production.

[0016] Optionally, the modified asphalt kneader includes: a machine body, a first shaft, a second shaft, a first impeller, a second impeller, a first driver, and a second driver, wherein,

[0017] The first and second shafts are arranged side by side horizontally within the machine body;

[0018] The first driver is connected to the first shaft and drives the first shaft to rotate;

[0019] The second driver is connected to the second shaft and drives the second shaft to rotate. The first shaft and the second shaft rotate at different speeds.

[0020] Multiple first blades are fixed on the first shaft, and multiple second blades are fixed on the second shaft. The second blades are located between adjacent first blades, and the first blades and second blades have intersecting portions in space.

[0021] Optionally, the polymer crusher crushes the input styrene-butadiene-styrene (SBS) polymer and then conveys the crushed SBS particles to the disperser.

[0022] The disperser mixes and disperses the SBS polymer particles with the added rubber powder until they are evenly dispersed, and then the resulting modified compound is conveyed to the modified asphalt kneader.

[0023] The hot base asphalt obtained by heating the base asphalt in the heat exchanger is delivered to the base asphalt feed pump, which then delivers the hot base asphalt to the kneader and the batching tank respectively.

[0024] The modified asphalt kneader transports the modified asphalt prepared according to the input modified compound and base hot asphalt to the batching tank;

[0025] The batching tank mixes and disperses the input modified asphalt, base hot asphalt, and filler to obtain polymer modified asphalt, which is then transported to the modified asphalt discharge pump.

[0026] The modified asphalt discharge pump pumps the input polymer-modified asphalt to the homogenizer.

[0027] Optionally, the size of the SBS polymer is 5mm-10mm, and the size of the crushed SBS polymer particles is less than 1mm.

[0028] Optional, also includes:

[0029] The elevator is connected to the feed inlet of the polymer crusher to add SBS polymer into the crusher.

[0030] Optional, also includes:

[0031] The feeding screw conveyor is connected to the disperser and conveys the adhesive powder into the disperser via a screw conveyor.

[0032] In summary, this application includes at least one of the following beneficial technical effects:

[0033] This patent, based on existing patents, invents a three-dimensional batching system for preparing polymer-modified asphalt. This system first pulverizes SBS polymer using a pulverizer to obtain small pulverized SBS particles, effectively reducing the number of grinding cycles, lowering energy consumption, and improving production efficiency. Furthermore, it preheats the base asphalt using a heat exchanger, increasing its viscosity. Then, under the kneading force of an asphalt kneader, the macromolecular chains of the pulverized SBS particles and adhesive powder are broken down, allowing them to dissolve uniformly in the preheated base asphalt, thus improving the performance of the resulting modified asphalt. Simultaneously, it reduces the impact of unground SBS particles on the appearance of the waterproof membrane, improving the quality of the final polymer-modified asphalt. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of a three-dimensional batching system for preparing polymer-modified asphalt according to an embodiment of this application.

[0035] Explanation of reference numerals in the attached drawings: 1. Heat exchanger; 2. Base asphalt feed pump; 3. Polymer crusher; 4. Disperser; 5. Modified asphalt kneader; 6. Batching tank; 7. Modified asphalt discharge pump; 8. Homogenizer. Detailed Implementation

[0036] To better understand the above-mentioned objectives, features, and advantages of this application, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0037] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below.

[0038] In this application, a three-dimensional batching system for preparing polymer-modified asphalt is provided to address the shortcomings of modified asphalt production batching systems, which suffer from low production efficiency and high energy consumption per unit time due to the large number of grinding cycles and excessively long stirring and dispersion time in colloid mills.

[0039] The following is in conjunction with the appendix Figure 1 This application will be described in further detail.

[0040] This application discloses a three-dimensional batching system for preparing polymer-modified asphalt. (Refer to...) Figure 1 In this embodiment, the three-dimensional batching system for preparing polymer-modified asphalt includes: a heat exchanger 1, a reference asphalt feed pump 2, a polymer crusher 3, a disperser 4, a modified asphalt kneader 5, a batching tank 6, a modified asphalt discharge pump 7, and a homogenizer 8.

[0041] The discharge port of the polymer crusher 3 is connected to the feed port of the disperser 4;

[0042] The discharge port of the disperser 4 is connected to the first feed port of the modified asphalt kneader 5;

[0043] The output end of heat exchanger 1 is connected to the input end of the reference asphalt feed pump 2;

[0044] The output end of the reference asphalt feed pump 2 is connected to the second feed port of the modified asphalt kneader 5 and the first feed port of the batching tank 6, respectively.

[0045] The discharge port of the modified asphalt kneader 5 is connected to the second inlet of the batching tank 6;

[0046] The discharge port of the batching tank 6 is connected to the input end of the modified asphalt discharge pump 7, and the output end of the modified asphalt discharge pump 7 is connected to the input end of the homogenizer 8.

[0047] In this application embodiment, as an optional embodiment, the disperser 4 includes, but is not limited to, a conical disperser.

[0048] In this embodiment of the application, as an optional embodiment, the polymer crusher 3 crushes the input polymer SBS and then conveys the crushed polymer SBS particles to the disperser 4.

[0049] The disperser 4 mixes and disperses the SBS polymer particles and the added rubber powder evenly to obtain the modified compound, which is then conveyed to the modified asphalt kneader 5.

[0050] The hot base asphalt obtained by heating the base asphalt in heat exchanger 1 is transported to base asphalt feed pump 2, which in turn feeds the hot base asphalt to kneader 5 and batching tank 6 respectively.

[0051] The modified asphalt kneader 5 transports the modified asphalt prepared according to the input modified compound and base hot asphalt to the batching tank 6;

[0052] The mixing tank 6 mixes and disperses the input modified asphalt, base hot asphalt and filler to obtain polymer modified asphalt, which is then conveyed to the modified asphalt discharge pump 7.

[0053] The modified asphalt discharge pump 7 pumps the input polymer modified asphalt to the homogenizer 8.

[0054] In this embodiment, pulverized SBS polymer particles are added to a disperser and physically dispersed evenly with rubber powder. Then, the mixture is fed downstream to a modified asphalt kneader and processed with the injected base hot asphalt. The rotor of the asphalt kneader generates a large kneading force, which breaks down the macromolecular chains of the pulverized SBS polymer particles and rubber powder (polymer), dissolving them in the base hot asphalt. The mixture is then fed downstream to a batching tank, where the base hot asphalt and filler (stone powder) are added and stirred and dispersed to prepare polymer-modified asphalt.

[0055] In this embodiment, the homogenizer 8 homogenizes the input polymer-modified asphalt.

[0056] In this embodiment of the application, as an optional embodiment, the homogenizer 8 is also connected to the external waterproof membrane production line oiling tank, and the polymer-modified bitumen obtained by homogenization is transported to the waterproof membrane production line oiling tank for production.

[0057] In this embodiment of the application, as an optional embodiment, the kneader 5 and the batching tank 6 are respectively connected to the matrix asphalt supply pump 2 through heating pipes, and the kneader 5 is connected to the batching tank 6 through heating pipes.

[0058] In this embodiment of the application, as an optional embodiment, the size of the polymer SBS is 5mm-10mm, and the size of the crushed polymer SBS particles is less than 1mm.

[0059] In this embodiment, heat exchanger 1 is located at the front end of base asphalt feeding pump 2. Both kneader 5 and batching tank 6 are equipped with base asphalt inlets, which are connected to base asphalt feeding pump 2 via heating pipes. Polymer crusher 3 crushes approximately 5-10mm polymer SBS into pulverized polymer SBS particles smaller than 1mm. The discharge port of polymer crusher 3 is connected to the first inlet of a cone disperser 4 containing rubber powder. The pulverized polymer SBS particles and rubber powder are stirred and mixed, and after uniform dispersion, the modified compound of polymer SBS particles and rubber powder is vertically fed into modified asphalt kneader 5. The modified asphalt kneader 5 uses the hot base asphalt output from the base asphalt feed pump 2 to generate strong shear force by different stirring speeds, uniformly dispersing and dissolving the modified compound formed by polymer SBS and rubber powder together with the hot base asphalt to prepare modified asphalt. The modified asphalt is then vertically added to the batching tank 6 through the discharge port. The batching tank 6 mixes and disperses the modified asphalt with the conveyed hot base asphalt at high speed to prepare polymer modified asphalt. The polymer modified asphalt is then conveyed to the homogenizer 8 through the discharge port of the modified asphalt discharge pump 7. After further homogenization in the homogenizer 8, it enters the coating tank of the waterproof membrane production line for production.

[0060] In this embodiment of the application, as an optional embodiment, a heat exchanger 1 for heating asphalt and a base asphalt supply pump 2 are connected by a pipeline.

[0061] In this embodiment of the application, as an optional embodiment, the polymer crusher 3 adopts a coolable body and uses the cutter shaft speed for cutting.

[0062] In this embodiment of the application, as an optional embodiment, the system further includes:

[0063] An elevator (not shown in the figure) is connected to the feed inlet of the polymer crusher 3 to add SBS polymer into the polymer crusher 3.

[0064] In this embodiment of the application, as another optional embodiment, the system further includes:

[0065] The feeding screw conveyor is connected to the disperser 4, and conveys the adhesive powder into the disperser 4 by means of a screw conveyor.

[0066] In this embodiment of the application, as another optional embodiment, the modified asphalt kneader 5 includes: a machine body, a first shaft, a second shaft, a first impeller, a second impeller, a first driver, and a second driver, wherein,

[0067] The first and second shafts are arranged side by side horizontally within the machine body;

[0068] The first driver is connected to the first shaft and drives the first shaft to rotate;

[0069] The second driver is connected to the second shaft and drives the second shaft to rotate. The first shaft and the second shaft rotate at different speeds.

[0070] Multiple first blades are fixed on the first shaft, and multiple second blades are fixed on the second shaft. The second blades are located between adjacent first blades, and the first blades and second blades have intersecting portions in space.

[0071] In this embodiment, as an optional embodiment, the first and second blades are Σ-shaped blades, arranged side-by-side and tangential, with differential speed. As an optional embodiment, the modified asphalt kneader 5 has a volume of 3100L.

[0072] In this embodiment of the application, as another optional embodiment, the volume of the mixing tank 6 is 15-20 tons, and it adopts a spiral stirring form and is heated by heat transfer oil.

[0073] The three-dimensional batching system for preparing polymer-modified asphalt of this invention has the following advantages:

[0074] First, a polymer SBS particle size is crushed into smaller particles using a polymer crusher. These smaller particles are then added to a disperser and mixed evenly with the rubber powder. The resulting modified compound is then fed into a modified asphalt kneader. A base asphalt feed pump delivers a certain amount of heated base asphalt (after heat exchanger) to the modified asphalt kneader. The kneader utilizes strong shearing force to evenly disperse and dissolve the modified compound into the base asphalt, resulting in modified asphalt. The modified asphalt is then added to a batching tank, where filler and a certain amount of base asphalt are added. After high-speed mixing for a period of time, polymer-modified asphalt is obtained. This modified asphalt is then homogenized by a homogenizer and transported to the coating tank of the production line for waterproof membrane production. Because a colloid mill is not used for grinding, the modification process of polymer SBS is completed in one step, shortening the modification time.

[0075] Second, the modified asphalt is modified using a modified asphalt kneader. Compared to grinding modified asphalt using a colloid mill, the modified asphalt kneader has one blade moving at a high speed and the other at a low speed to generate shear force. The different blade speeds allow the mixed materials to be quickly sheared, resulting in a more uniform mixing of high-content polymer SBS with the rubber powder and better modified asphalt performance. By crushing the polymer SBS into small particles, the modification performance is improved while eliminating the impact of polymer particles on the appearance of the waterproof membrane, thereby increasing the production efficiency of polymer-modified asphalt.

[0076] Third, the three-dimensional batching system for preparing polymer-modified asphalt uses a vertical distribution, with materials being fed vertically from top to bottom, making the design layout simpler and improving the production efficiency of each stage; while the power of the kneader is much smaller than that of the colloid mill, reducing energy consumption in the production process and saving energy and reducing emissions.

[0077] In this application, the term "multiple" refers to at least two or more, unless otherwise expressly defined. The terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "linking" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0078] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

Claims

1. A three-dimensional batching system for preparing polymer-modified asphalt, characterized in that: include: The components include a heat exchanger, a reference asphalt feed pump, a polymer crusher, a disperser, a modified asphalt kneader, a batching tank, a modified asphalt discharge pump, and a homogenizer. The discharge port of the polymer crusher is connected to the feed port of the disperser; The discharge port of the disperser is connected to the first feed port of the modified asphalt kneader; The output end of the heat exchanger is connected to the input end of the reference asphalt feed pump; The output end of the reference asphalt feed pump is connected to the second inlet of the modified asphalt kneader and the first inlet of the batching tank, respectively. The discharge port of the modified asphalt kneader is connected to the second inlet of the batching tank; The discharge port of the batching tank is connected to the input end of the modified asphalt discharge pump, and the output end of the modified asphalt discharge pump is connected to the input end of the homogenizer.

2. The three-dimensional batching system for preparing polymer-modified asphalt according to claim 1, characterized in that: The disperser includes a conical disperser.

3. The three-dimensional batching system for preparing polymer-modified asphalt according to claim 1, characterized in that: The kneader and batching tank are respectively connected to the base asphalt supply pump via heating pipes.

4. The three-dimensional batching system for preparing polymer-modified asphalt according to claim 1, characterized in that: The kneader is connected to the ingredient tank via a heating pipe.

5. The three-dimensional batching system for preparing polymer-modified asphalt according to claim 1, characterized in that: The homogenizer is also connected to the external waterproof membrane production line's oil coating tank, transporting the homogenized polymer-modified bitumen to the waterproof membrane production line's oil coating tank for production.

6. The three-dimensional batching system for preparing polymer-modified asphalt according to claim 1, characterized in that: The modified asphalt kneader includes: a machine body, a first shaft, a second shaft, a first impeller, a second impeller, a first drive unit, and a second drive unit, wherein... The first and second shafts are arranged side by side horizontally within the machine body; The first driver is connected to the first shaft and drives the first shaft to rotate; The second driver is connected to the second shaft and drives the second shaft to rotate. The first shaft and the second shaft rotate at different speeds. Multiple first blades are fixed on the first shaft, and multiple second blades are fixed on the second shaft. The second blades are located between adjacent first blades, and the first blades and second blades have intersecting portions in space.

7. The stereochemical batching system for preparing polymer-modified asphalt according to any one of claims 1 to 6, characterized in that: The polymer crusher crushes the input styrene-butadiene-styrene (SBS) polymer and then conveys the crushed SBS particles to the disperser. The disperser mixes and disperses the SBS polymer particles with the added rubber powder until they are evenly dispersed, and then the resulting modified compound is conveyed to the modified asphalt kneader. The hot base asphalt obtained by heating the base asphalt in the heat exchanger is delivered to the base asphalt feed pump, which then delivers the hot base asphalt to the kneader and the batching tank respectively. The modified asphalt kneader transports the modified asphalt prepared according to the input modified compound and base hot asphalt to the batching tank; The batching tank mixes and disperses the input modified asphalt, base hot asphalt, and filler to obtain polymer modified asphalt, which is then transported to the modified asphalt discharge pump. The modified asphalt discharge pump pumps the input polymer-modified asphalt to the homogenizer.

8. The stereochemical batching system for preparing polymer-modified asphalt according to claim 7, characterized in that: The size of the SBS polymer is 5mm-10mm, and the size of the crushed SBS polymer particles is less than 1mm.

9. The three-dimensional batching system for preparing polymer-modified asphalt according to claim 7, characterized in that: Also includes: The elevator is connected to the feed inlet of the polymer crusher to add SBS polymer into the crusher.

10. The stereochemical batching system for preparing polymer-modified asphalt according to claim 6, characterized in that: Also includes: The feeding screw conveyor is connected to the disperser and conveys the adhesive powder into the disperser via a screw conveyor.

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