Asphalt oxidation reaction kettle

Abstract

The utility model belongs to the technical field of asphalt oxidation, and particularly discloses an asphalt oxidation reaction kettle which comprises a kettle body and a stirring pipe, the stirring pipe extends into the kettle body from the outside of the kettle body and bends and extends in the kettle body until the stirring pipe penetrates out of the kettle body, air holes are formed in the pipe section, extending into the kettle body, of the stirring pipe, and the air holes are communicated with the stirring pipe. And the stirring pipe and the kettle body can rotate relatively. The method has the effect of improving the oxidation uniformity of the asphalt.

Description

Technical Field

[0001] The present application belongs to the technical field of asphalt oxidation, and more specifically, relates to an asphalt oxidation reactor. Background Art

[0002] Asphalt is a byproduct of the coal or petroleum industries, primarily composed of a large number of polycyclic aromatic hydrocarbons (PAHs) and structurally related heterocyclic compounds. Due to its advantages such as low price and low ash content, asphalt can be used to form nearly parallel carbon layers during heating, ensuring high carbon yield and conductivity, it is widely used in the preparation of sodium-ion batteries as a pitch-based precursor. Asphalt precursors are also used as precursor materials for hard carbon anode materials in sodium-ion batteries.

[0003] Direct pyrolysis of asphalt forms a microstructure with small interlayer spacing and high orientation during the uncontrolled liquid-phase carbonization process, resulting in poor rate performance in sodium-ion batteries. However, by modifying the asphalt molecules and weakening or disrupting the interactions between aromatic hydrocarbons, the graphitization of the asphalt can be interfered with, driving the transformation of the microstructure.

[0004] In the related art, asphalt can be modified by heating it in an air or oxygen atmosphere for oxidative crosslinking. However, when heating and oxidizing asphalt in air or oxygen, especially when large batches of asphalt are oxidized, some parts of the asphalt are often not exposed to air or oxygen, or are not fully exposed, resulting in uneven oxidation. This can lead to different degrees of oxidation in the same batch of oxidized asphalt, resulting in poor performance consistency in the final hard carbon, making it difficult to use properly. Improvements are urgently needed. Utility Model Content

[0005] In response to the defects or improvement needs of the existing technology, the present application provides an asphalt oxidation reactor, which aims to improve the problem of uneven asphalt oxidation.

[0006] The present application provides an asphalt oxidation reactor comprising:

[0007] kettle body;

[0008] A stirring tube extends from the outside of the kettle into the kettle and bends and extends inside the kettle until it passes through the kettle. The section of the stirring tube extending into the kettle is provided with air holes, and the stirring tube and the kettle can rotate relative to each other.

[0009] Through the above technical solution conceived by the present application, compared with the existing technology, in this design, when the kettle body and the stirring tube rotate relative to each other, the stirring tube can not only serve as a ventilation component to introduce oxygen or air into the kettle body; it can also serve as a stirring component to stir the asphalt in the kettle body, so that oxygen or air can fully contact the asphalt material, thereby improving the uniformity of asphalt oxidation.

[0010] As a further preference, the stirring tube includes an air inlet section, a stirring section and an air outlet section which are connected in sequence, the air inlet section and the air outlet section both pass through the inside and outside of the kettle body and are rotatably connected to the kettle body, and the stirring section is located inside the kettle body and includes at least one bending portion.

[0011] As a further preference, at least one bending portion is arranged offset from the axis.

[0012] As a further preference, at least one bent portion extends to the junction of the inner side wall and the inner bottom wall of the kettle body.

[0013] As a further preference, the pipe section of the stirring pipe extending into the kettle body is L-shaped as a whole.

[0014] As a further preference, the reactor further comprises a rotating seat, and the stirring tube is rotatably connected to the reactor body via the rotating seat.

[0015] As a further preference, the reactor further comprises a rotating seat, and the stirring tube is rotatably connected to the reactor body via the rotating seat.

[0016] As a further preference, the reactor further comprises a rotating seat, and the stirring tube is rotatably connected to the reactor body via the rotating seat.

[0017] As a further preferred embodiment, a plurality of scrapers are fixed to the inner side wall of the kettle body.

[0018] As a further preference, the scraper extends spirally on the inner circumferential wall of the kettle body.

[0019] In general, the above technical solutions conceived by this application have the following technical advantages compared with the existing technologies:

[0020] 1. When the kettle body and the stirring tube rotate relative to each other, the stirring tube can not only serve as a ventilation component to introduce oxygen or air into the kettle body, but also as a stirring component to stir the asphalt in the kettle body, so that oxygen or air can fully contact with the asphalt material, making the asphalt oxidation more uniform.

[0021] 2. The reactor is also equipped with a stirring device and a scraper, which can be used together with the stirring tube to stir the asphalt in the reactor to improve the uniformity of asphalt oxidation. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a cross-sectional view of an asphalt oxidation reactor provided in an embodiment of the present application;

[0023] Figure 2 This is a cross-sectional view of an air intake section and a stirring section provided in an embodiment of the present application;

[0024] Figure 3 This is a cross-sectional view of an asphalt oxidation reactor with a stirring device and a scraper provided in an embodiment of the present application.

[0025] Throughout the drawings, the same reference numerals are used to denote the same elements or structures, wherein:

[0026] 1. Kettle body; 1-1. Rotating seat; 2. Stirring tube; 2-1. Air inlet section; 2-2. Stirring section; 2-3. Air outlet section; 2-4. Bending section; 3. Air supply device; 4. Stirring device; 4-1. Rotating power part; 4-2. Stirring blade; 5. Scraper. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solutions and advantages of this application more clear, the following further describes this application in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0028] The following is combined with Figure 1-3 This application is described in further detail.

[0029] The present application discloses an asphalt oxidation reactor. Figure 1 The asphalt oxidation reactor includes a kettle body 1 and a stirring tube 2. The stirring tube 2 extends into the kettle body 1 from the outside of the kettle body 1 and bends and extends inside the kettle body 1 until it passes through the kettle body 1. The pipe section of the stirring tube 2 extending into the kettle body 1 is provided with an air hole, and the stirring tube 2 and the kettle body 1 can rotate relative to each other.

[0030] Under this design, when the kettle body 1 and the stirring tube 2 rotate relative to each other, the stirring tube 2 can not only serve as a ventilation component to introduce oxygen or air into the kettle body 1; it can also serve as a stirring component to stir the asphalt in the kettle body 1 so that oxygen or air can fully contact the asphalt material, thereby improving the uniformity of asphalt oxidation.

[0031] Specifically, the stirring tube 2 includes an air inlet section 2-1, a stirring section 2-2, and an air outlet section 2-3, which are connected in sequence. The air inlet section 2-1 and the air outlet section 2-3 both pass through the interior and exterior of the kettle body 1 and are rotatably connected to the kettle body 1. The stirring section 2-2 is located inside the kettle body 1 and includes at least one bend 2-4.

[0032] In some specific embodiments, at least one of the bent portions 2-4 is disposed off-axis, which can effectively enhance the stirring and oxidation effects.

[0033] In some embodiments, at least one bent portion 2 - 4 extends to the junction of the inner side wall and the inner bottom wall of the kettle body 1 to stir the asphalt at the junction of the inner side wall and the inner bottom wall of the kettle body 1 .

[0034] It should be noted that, for the bent portion 2-4 at the junction of the inner side wall and the inner bottom wall of the kettle body 1, the bent portion 2-4 can be in contact with the junction to obtain the effect of scraping the asphalt on the wall surface; of course, the bent portion 2-4 can also maintain a gap with the junction.

[0035] Furthermore, the air inlet section 2-1 and the air outlet section 2-3 are arranged in parallel.

[0036] Furthermore, the pipe section of the stirring pipe 2 extending into the kettle body 1 is L-shaped as a whole.

[0037] like Figure 1 As shown, in some specific embodiments, the stirring section 2-2 includes: a first pipe section extending from the air inlet section 2-1 to the junction of the inner side wall and the inner bottom wall of the kettle body 1, a second pipe section inclined upward and extending from the first pipe section to the opposite side of the axis of the kettle body 1, a third pipe section folded back from the second pipe section to the inner corner of the bend between the first pipe section and the second pipe section, and a fourth pipe section extending obliquely upward from the end of the third pipe section along one side of the bend inner corner. In this stirring tube 2, the air inlet section 2-1, the first pipe section, the second pipe section, the third pipe section, the fourth pipe section and the air outlet section 2-3 are connected in sequence, and the first pipe section, the second pipe section, the third pipe section and the fourth pipe section all have air holes. In addition, in this scheme, the axis (i.e. Figure 1 The dotted line in the figure is the rotation axis.

[0038] Furthermore, in order to realize the rotation connection between the stirring tube 2 and the kettle body 1, in some embodiments, a rotating seat 1-1 is rotatably installed on the top of the kettle body 1, and the stirring tube 2 is rotatably connected to the kettle body 1 through the rotating seat 1-1. Figure 1 The design of the rotating seat 1-1 is demonstrated in the shown solution.

[0039] Specifically, the rotating seat 1-1 can be installed at the top center of the kettle body 1 using a sleeve connection or other feasible rotary sealing structure. The air inlet section 2-1 and the air outlet section 2-3 of the stirring tube 2 are passed through and fixed in the rotating seat 1-1, and the outer circumferences of the air inlet section 2-1 and the air outlet section 2-3 are both sealed to the rotating seat 1-1.

[0040] In other embodiments, the pipe sections of the air inlet section 2-1 and the air outlet section 2-3 that pass through the kettle body 1 can be set as semicircular pipe sections, and the side planes of the two semicircular pipe sections fit together to form a full-circular pipe body (i.e., a round pipe), which is passed through the central circular hole at the top of the kettle body 1 and is rotatably connected to the kettle body 1 as a whole. For ease of understanding, Figure 2 A cross-sectional view of the lower tube of this design is shown.

[0041] Furthermore, in some embodiments, the reactor further comprises a gas supply device 3, the gas supply port of the gas supply device 3 being connected to a certain port of the stirring tube 2. In this case, the port of the stirring tube 2 connected to the gas supply device 3 is the gas inlet, and the other port is the gas outlet.

[0042] It is clear that in some embodiments, the reactor may not include the gas supply device 3. In actual use, the reactor is connected to an external gas supply device / gas supply device / gas supply system.

[0043] Furthermore, in some embodiments, the reactor further includes a stirring device 4 , which is used to stir the asphalt raw material inside the reactor body 1 .

[0044] Specifically, if Figure 3 As shown, the stirring device 4 includes a rotating power member 4-1 installed at the bottom center of the kettle body 1, and a stirring blade 4-2 installed at the power end of the rotating power member 4-1. The stirring blade 4-2 can be spiral-shaped, blade-shaped, etc. The rotating power member 4-1 includes but is not limited to a motor.

[0045] In other embodiments, the stirring blade 4-2 may be replaced by a scraper, one end of which is connected to the output shaft of the rotating power member 4-1, and the other end of which extends to fit the inner wall of the kettle body 1. However, it should be noted that neither the stirring blade 4-2 nor the scraper should interfere with the stirring tube 2.

[0046] Further, such as Figure 3 As shown, in some embodiments, a plurality of scrapers 5 are further fixed to the inner sidewall of the kettle 1. During the asphalt agitation process, the scrapers 5 provide a certain shear force to the asphalt, thereby preventing the asphalt from agglomerating during the oxidation process. Furthermore, multiple scrapers 5 are vertically spaced apart, and the scrapers 5 are preferably spiral scrapers that extend around the inner circumference of the kettle.

[0047] It should be noted that the reactor in this embodiment can be equipped with a heating function, i.e., the reactor body 1 is provided with a heating structure. The heating structure includes, but is not limited to, jacket or interlayer heating, electric heater heating, steam heating, electromagnetic heating, combustion heating, etc. For example, an electric heater can be installed on the reactor body 1 to provide heat to the reactants (i.e., asphalt) through electrical heating. Of course, the reactor can also be heated without a heating function and can be heated by an external heating device during use.

[0048] Furthermore, the reactor is also provided with an inlet and outlet (not shown in the figure), which can be arranged at the bottom or side wall of the reactor body 1, and an on-off valve is installed at the inlet and outlet.

[0049] Furthermore, there are multiple options for the relative rotation of the stirring tube 2 and the kettle body 1. For example, the stirring tube 2 can be fixed while the kettle body 1 is rotated and adjusted. For another example, the kettle body 1 can be fixed while the stirring tube 2 is rotated and adjusted.

[0050] Specifically, the reactor body 1 can be placed or fixed on a rotating platform or installed in another rotary power device, and the portion of the stirring tube 2 extending beyond the reactor body 1 can be fixed to the ground or an external foundation such as a beam via a bracket or other structure. When installed on the rotating platform, the reactor body 1 can be rotated by activating the rotating platform. Since the stirring tube 2 is fixed to the external foundation, the stirring tube 2 can stir the material in the reactor body when the reactor body 1 rotates.

[0051] For example, the reactor can also include a frame and a rotary drive device. In this solution, the reactor body 1 is rotatably mounted on the frame, and the outer section of the stirring tube 2 can be optionally fixed to the frame. The rotary drive device is mounted on the frame and used to drive the reactor body 1 to rotate, thereby conveniently operating the reactor. If necessary, the frame can also be equipped with rollers to facilitate the transfer of the reactor.

[0052] In addition, when the kettle body 1 is fixed and the stirring tube is rotated, the kettle body 1 is placed stationary or fixed on the ground or other foundations, a motor is installed on the kettle body 1, and a driving gear is installed on the output shaft of the motor. A driven gear is coaxially fixed on the rotating seat 1-1 or the circular tube composed of the air inlet section 2-1 and the air outlet section 2-3, and the driven gear meshes with the driving gear. When in use, since the kettle body 1 is fixed, the driving gear is driven by the motor to rotate, and the driving gear drives the stirring tube 2 to rotate through the driven gear, thereby achieving stirring. However, it should be noted that in this scheme, a rotational connection should be adopted between the stirring tube 2 and the stirring device 4, and the rotational connection therein does not affect the rotation of the stirring tube 2 and the kettle body 1.

[0053] It should be understood that expressions such as "include" and "may include" used in this application indicate the existence of the disclosed functions, operations, or constituent elements, and do not limit one or more additional functions, operations, and constituent elements. In this application, terms such as "include" and / or "have" may be interpreted as indicating a specific characteristic, number, operation, constituent element, component, or combination thereof, but may not be interpreted as excluding the existence or possibility of adding one or more other characteristics, numbers, operations, constituent elements, components, or combinations thereof.

[0054] It should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0055] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0056] In this application, unless otherwise specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood broadly. For example, they can refer to fixed connection, detachable connection, or integral connection; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0057] It is easy for those skilled in the art to understand that the above is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. An asphalt oxidation reactor, characterized in that: include: Kettle body (1); A stirring tube (2) extends from the outside of the kettle body (1) into the kettle body (1) and bends and extends inside the kettle body (1) until it passes through the kettle body (1). The section of the stirring tube (2) extending into the kettle body (1) is provided with an air hole, and the stirring tube (2) and the kettle body (1) can rotate relative to each other.

2. The asphalt oxidation reactor according to claim 1, characterized in that: The stirring tube (2) comprises an air inlet section (2-1), a stirring section (2-2) and an air outlet section (2-3) which are connected in sequence. The air inlet section (2-1) and the air outlet section (2-3) both pass through the inside and outside of the kettle body (1) and are rotatably connected to the kettle body (1). The stirring section (2-2) is located inside the kettle body (1) and comprises at least one bent portion (2-4).

3. The asphalt oxidation reactor according to claim 2, characterized in that: At least one bending portion (2-4) is arranged off-axis.

4. The asphalt oxidation reactor according to claim 2, characterized in that: At least one bent portion (2-4) extends to the junction of the inner side wall and the inner bottom wall of the kettle body (1).

5. The asphalt oxidation reactor according to claim 1, characterized in that: The pipe section of the stirring pipe (2) extending into the kettle body (1) is L-shaped as a whole.

6. The asphalt oxidation reactor according to any one of claims 1 to 5, characterized in that: The reactor further comprises a rotating seat (1-1), and the stirring tube (2) is rotatably connected to the reactor body (1) via the rotating seat (1-1).

7. The asphalt oxidation reactor according to any one of claims 1 to 5, characterized in that: The reactor further comprises an air supply device (3), and the air supply port of the air supply device (3) is connected to a certain pipe port of the stirring tube (2).

8. The asphalt oxidation reactor according to any one of claims 1 to 5, characterized in that: The reactor further comprises a stirring device (4) for stirring the asphalt raw material inside the reactor body (1).

9. The asphalt oxidation reactor according to any one of claims 1 to 5, characterized in that: A plurality of scrapers (5) are fixed to the inner side wall of the kettle body (1).

10. The asphalt oxidation reactor according to claim 9, characterized in that: The scraper (5) spirally extends on the inner peripheral wall of the kettle body (1).

Images