Reactor for modified asphalt

Abstract

The utility model relates to the technical field of asphalt modification, in particular to a reactor for modifying asphalt, which adopts the technical scheme that buffer cavities are arranged at two ends in a tank body, a reaction cavity is arranged between the two buffer cavities, reaction cavity covers are arranged at two ends of the reaction cavity, and the reaction cavity covers are arranged at two ends of the tank body. Two parallel spiral plates are arranged between the two reaction cavity covers, the spiral plates spirally inwards rotate in the axial direction of the tank body, a central partition plate is arranged at the inwards-rotating end points of the two spiral plates, and the starting points of the two spiral plates are fixed to the inner wall of the tank body; the reaction cavity is divided into two closed and independent cavities by the two reaction cavity covers, the two spiral plates, the central partition plate and the tank body, the asphalt inlet and the asphalt outlet are communicated with one cavity, and the thermal medium inlet and the thermal medium outlet are communicated with the other cavity; through holes are formed in the centers of the two reaction cavity covers and are respectively communicated with the two cavities; the device is widely applied to the field of asphalt modification.

Description

Technical Field

[0001] This utility model relates to the field of asphalt modification technology, specifically to a reactor for modified asphalt. Background Technology

[0002] Coal tar processing produces 50%-60% asphalt, a major product of coal tar processing. In recent years, the rapid construction of my country's highway system has led to a surge in demand for asphalt. However, asphalt suffers from poor high-temperature stability, making it difficult to meet the ever-increasing engineering requirements. Currently, graphite is receiving considerable attention as a negative electrode material for lithium-ion batteries, but it also faces several challenges, such as graphite sheet peeling during charging and discharging, resulting in a significant decrease in cycle performance and poor rate capability. Coating the graphite negative electrode surface with high-softening-point asphalt can significantly improve the capacity and cycle stability of lithium-ion batteries, thus increasing the demand for modified asphalt. Furthermore, the production of high-performance carbon materials such as carbon fiber also requires asphalt modification to improve its properties.

[0003] Currently, the domestic processes for producing modified asphalt include oxidative thermal polymerization, thermal condensation polymerization, and vacuum flash evaporation. Oxidative thermal polymerization involves directly placing medium-temperature asphalt into the polymerization vessel of a secondary evaporator, controlling the temperature at around 360℃, and introducing compressed air or oxygen for oxidative polymerization. This process generates a large amount of non-condensable gases carrying asphalt fumes into the atmosphere, causing environmental pollution, so this method is rarely used now. Vacuum flash evaporation uses vacuum distillation technology to subject medium-temperature asphalt, which enters from the radiant section of a tubular furnace, to reduced pressure distillation at 350-370℃. This process has high equipment investment costs and strict operating requirements. Currently, thermal condensation polymerization is mostly used based on heating methods, but it suffers from uneven heat transfer, easy coking leading to low heat transfer efficiency, long modification time, high energy consumption, high quinoline insoluble content, and short system operating cycles, limiting the expansion of production scale. Utility Model Content

[0004] This invention overcomes the shortcomings of existing technologies and provides a highly efficient and stable reactor for modified asphalt, which improves the uniformity and stability of modified asphalt, enhances the heat transfer efficiency during the modification process, shortens the modification time, reduces energy consumption, and thus improves production efficiency.

[0005] In order to solve the above technical problems, the utility model adopts the technical scheme: a reactor of modified asphalt, including jar body, the both ends of jar body are provided with jar cover, one end jar cover is provided with heat medium inlet, the other end jar cover is provided with asphalt outlet, the both ends of jar body inside are provided with buffer cavity, the buffer cavity is provided with reaction cavity, the both ends of reaction cavity are provided with reaction cavity cover, two parallel spiral plates are arranged between the two reaction cavity covers, the spiral plate is helical inwards along the axial direction of jar body, the inwards terminal point of two spiral plates is provided with center partition, the start point of two spiral plates is fixed with jar body inner wall, two reaction cavity covers, two spiral plates, center partition and jar body divide reaction cavity into two closed independent chambers, one side of jar body is provided with asphalt inlet, the other side of jar body is provided with heat medium outlet, the asphalt inlet and asphalt outlet are communicated with one of the chambers, the heat medium inlet and heat medium outlet are communicated with the other chamber, the central hole is opened in the center of two reaction cavity covers and is communicated with two chambers respectively.

[0006] The spiral plate is helical in the jar body, the number of spiral turns is 3-8, the spiral angle is 15-30 DEG, the thickness is 5-10mm, which guarantees the sufficient flow of fluid and heat exchange.

[0007] The center partition is used for separating two spiral channels completely, preventing the mixing of asphalt and heating medium at the center.

[0008] The spiral plate is provided with baffle. The baffle is welded on the spiral plate, increases the turbulence degree of fluid, improves the heat transfer coefficient, ensures that the asphalt is in full contact with the heating medium during the flowing process, and makes the asphalt reach the required temperature for modification in a short time.

[0009] The baffle is spherical protrusion, which is welded on the two sides of the spiral plate and is evenly distributed on the two spiral plates.

[0010] The protrusion height of the baffle is less than one third of the distance between the two spiral plates. The distribution density is that 10-20 baffles are arranged on each square meter of spiral plate area.

[0011] The jar body is provided with pressure reducing valve communicated with the buffer cavity, preventing the pressure in the buffer cavity from being too high.

[0012] The raw material asphalt is transported into the reactor through the asphalt inlet by a conveying pump for turbulent flow; the modified asphalt obtained from the reactor is transported to a modified asphalt storage tank through the asphalt outlet; the heating medium is heated to about 300-400 DEG C, and after heating, is transported into the reactor through the heating medium inlet by a circulating pump for turbulent flow, and the heated heating medium is heated again and then enters the reactor, so that the heating medium is recycled.

[0013] Compared with the prior art, the utility model has the following beneficial effects.

[0014] 1、The raw material asphalt in the utility model does not directly contact with high-temperature heat source, realizes sufficient contact between the asphalt and heat in the reactor, adopts two parallel spiral plates to separate the asphalt and the heating medium, and sets spherical baffle plates on the spiral plates to maximize the high heat transfer specific surface area, and compared with the existing spiral heat exchanger, the structure is simple, the heat transfer efficiency is improved, the problems of uneven asphalt heating, easy coking and high quinoline insoluble matter are solved, the asphalt modification is more uniform and stable, and the high-temperature stability of the asphalt is remarkably improved.

[0015] 2、The buffer cavity and the pressure reducing valve are arranged at both ends of the reaction cavity, so that the operating pressure during equipment operation is reduced, and the equipment operation safety is improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] The utility model will be further described below in combination with the drawings.

[0017] Figure 1 It is a structural schematic view of the utility model.

[0018] Figure 2 It is a tank body axial sectional view of the utility model.

[0019] Figure 3 It is a tank body radial sectional view of the utility model.

[0020] Figure 4 It is a spiral plate development view of the utility model.

[0021] In the drawing: 1 is a tank body, 2 is a tank cover, 3 is a buffer cavity, 4 is a reaction cavity, 5 is a reaction cavity cover, 6 is a spiral plate, 7 is a center partition, 8 is a heating medium inlet, 9 is an asphalt outlet, 10 is an asphalt inlet, 11 is a heating medium outlet, 12 is a baffle plate, 13 is a pressure reducing valve, and 14 is a through hole. DETAILED DESCRIPTION

[0022] The utility model makes further illustration in combination with the above-mentioned drawings.

[0023] The utility model discloses a kind of reactors of modified asphalt provided in a typical implementation mode, including tank body 1, the tank body 1 both ends are provided with tank cover 2, one end tank cover 2 is provided with heat medium inlet 8, the other end tank cover 2 is provided with asphalt outlet 9, tank body 1 inside both ends are provided with buffer cavity 3, two buffer cavities 3 are provided with reaction cavity 4, reaction cavity 4 both ends are provided with reaction cavity cover 5, two reaction cavity covers 5 are provided with two parallel spiral plates 6, spiral plate 6 is spirally inwards along the axial direction of tank body 1, two spiral plates 6 inwards end point are provided with center partition 7, the start point of two spiral plates 6 is fixed with tank body 1 inner wall, two reaction cavity covers 5, two spiral plates 6, center partition 7 and tank body 1 divide reaction cavity 4 into two closed independent chambers, one side of tank body 1 is provided with asphalt inlet 10, the other side of tank body 1 is provided with heat medium outlet 11, asphalt inlet 10 and asphalt outlet 9 are communicated one of chamber, heat medium inlet 8 and heat medium outlet 11 are communicated another chamber;Two reaction cavity covers 5 are centrally provided with through hole 14 and are communicated two chambers respectively.

[0024] In preferred implementation mode, spiral plate 6 is provided with baffle 12. Baffle 12 is spherical protrusion, which is welded on both sides of spiral plate 6, and is evenly distributed on two spiral plates 6. The protrusion height of baffle 12 is less than one third of the distance between two spiral plates 6.

[0025] In another preferred implementation mode, tank body 1 is provided with pressure reducing valve 13 and is communicated with buffer cavity 3. The volume of buffer cavity 3 is 10%-20% of the volume of reaction cavity 4.

[0026] In another preferred implementation mode, the number of spiral turns of spiral plate 6 in tank body 1 is 3-8 turns.

[0027] The following embodiment provides a relatively specific reactor of modified asphalt.

[0028] Tank body 1, according to production scale, its diameter is 1.5 meters-3 meters;According to the length of reaction cavity and buffer cavity, its length is 5 meters-10 meters;According to working pressure and material strength, its wall thickness is 10 mm-20 mm.

[0029] Buffer cavity 3, located at both ends of tank body 1, the length of buffer cavity 3 is 0.5 meters-1 meter, and the diameter is the same as that of tank body 1, the volume of buffer cavity 3 is designed according to asphalt flow and residence time, and is usually 10%-20% of the volume of reaction cavity.

[0030] Reaction cavity 4, which occupies the main part of tank body 1, the length of reaction cavity 4 is 4 meters-8 meters, and the diameter is the same as that of tank body 1, the volume of reaction cavity 4 is designed according to the demand of asphalt modification reaction, and is usually 60%-80% of the total volume of tank body.

[0031] Spiral plate 6, helix angle 15° - 30°, spiral turns 3-8, length same as reaction chamber length,

[0032] According to fluid flow and heat exchange requirements, the width of the spiral plate 6 is 100 mm - 300 mm, and the spacing between the spiral plates 6 is 100 mm - 300 mm. According to the material strength and pressure resistance requirements, the thickness of the spiral plate 6 is 5 mm - 10 mm.

[0033] Center partition 7, diameter 600-1000 mm, thickness 10 mm - 20 mm, to ensure the separation effect and structural strength.

[0034] Baffle 12, shape is a spherical protrusion, according to the spiral plate spacing, the diameter is 50 mm - 100 mm, the height is less than 1 / 3 of the spiral plate spacing, usually 20 mm - 50 mm. Distribution density: 10-20 baffles are arranged on each square meter of spiral plate area.

[0035] The diameter of the through hole 14 is 100 mm - 200 mm, which ensures smooth flow of fluid. The diameter of the pressure reducing valve 13 is designed according to the buffer cavity pressure and flow, usually 50 mm - 100 mm.

[0036] The utility model discloses in using, the raw material pitch is by the delivery pump and is sent into pitch entrance 10 through the pipeline, enters the chamber of pitch entrance 10 side, and the raw material pitch flows along the chamber separated by spiral plate 6 to reaction chamber 4, and the heat exchange with the heat medium in another chamber occurs in the flowing process, and the heated pitch continues along the chamber of spiral type and flows, finally from the through hole 14 of the corresponding reaction chamber cover 5 and flows into the buffer cavity 3 of pitch outlet 9 side, and flows out from pitch outlet 9, on the other hand, the delivery route of heat medium is that heat medium is sent into heat medium entrance 8 through the pipeline after being heated by the delivery pump, enters the buffer cavity 3 of heat medium entrance 8 side, then flows into another chamber from the central through hole 14 of the reaction chamber cover 5 of heat medium entrance 8 side, and after the heat of heat medium is transferred to the raw material pitch, flows outward along the spiral chamber, finally flows out from heat medium outlet 11, so as to complete the heat transfer of pitch and heat medium.

[0037] The above embodiments only exemplarily illustrate the principle and effect of the utility model, and are not used to limit the utility model. Those skilled in the art can modify or improve the above embodiments without departing from the spirit and scope of the utility model. Therefore, all equivalent modifications or changes completed by those skilled in the art without departing from the spirit and technical thought disclosed by the utility model should be covered by the claims of the utility model.

Claims

1. A reactor for modifying bitumen comprising a tank (1), characterized in that, The tank body (1) is provided with tank covers (2) at both ends, one end tank cover (2) is provided with hot medium inlet (8), the other end tank cover (2) is provided with asphalt outlet (9), the tank body (1) is provided with buffer cavity (3) inside both ends, the two buffer cavities (3) are provided with reaction cavity (4) between them, the reaction cavity (4) is provided with reaction cavity cover (5) at both ends, two parallel spiral plates (6) are arranged between the two reaction cavity covers (5), the spiral plate (6) is spirally inwards along the axial direction of the tank body (1), the two spiral plates (6) are provided with center partition (7) at the inwards rotation end point, the two spiral plates (6) are fixed with the inner wall of the tank body (1) at the starting point, two reaction cavity covers (5), two spiral plates (6), center partition (7) and tank body (1) divide the reaction cavity (4) into two closed independent chambers, the tank body (1) is provided with asphalt inlet (10) on one side, the tank body (1) is provided with hot medium outlet (11) on the other side, the asphalt inlet (10) and asphalt outlet (9) are communicated with one of the chambers, the hot medium inlet (8) and hot medium outlet (11) are communicated with the other chamber; two reaction cavity covers (5) are provided with through holes (14) in the center to communicate with two chambers respectively.

2. A reactor for modifying bitumen according to claim 1, characterized in that, The spiral plate (6) is provided with baffle (12).

3. A reactor for modifying bitumen according to claim 2, characterized in that, The baffle (12) is a spherical protrusion, which is welded on both sides of the spiral plate (6) and is evenly distributed on the two spiral plates (6).

4. A reactor for modifying bitumen according to claim 3, characterized in that, The protrusion height of the baffle (12) is less than one third of the distance between the two spiral plates (6).

5. A reactor for modifying bitumen according to claim 1 or 4, characterized in that, The tank body (1) is provided with pressure reducing valve (13) communicated with the buffer cavity (3), to prevent the pressure in the buffer cavity (3) from being too high.

6. A reactor for modifying bitumen according to claim 5, characterized in that, The volume of the buffer cavity (3) is 10%-20% of the volume of the reaction cavity (4).

7. A reactor for modifying bitumen according to claim 1 or 6, characterized in that, The spiral plate (6) has 3-8 spiral turns in the tank body (1).

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