Oxidation device for preparing asphalt with high softening point

Abstract

The utility model discloses an oxidation device for preparing asphalt with a high softening point, which comprises an oxidation reactor, one side of the top of the oxidation reactor is provided with a feed port, one side of the top of the oxidation reactor is provided with an air inlet, the other side of the top of the oxidation reactor is provided with a vacuum orifice, and the center of the top of the oxidation reactor is provided with a fixed support. An air filtering box is installed on the fixing support, a dust filtering net is arranged in the air filtering box, an activated carbon adsorption net is arranged in the air filtering box, a suction fan is installed on one side of the air filtering box, and an air suction pipe is communicated between the air suction end of the suction fan and the air filtering box. An air inlet pipe is communicated between the air outlet end of the suction fan and the air inlet, and an air inlet is formed in the other end of the air filter box. The device has the beneficial effects that impurities are prevented from being mixed with medium-temperature coal pitch and being fully mixed with air to generate oxidation reaction, so that the mixing efficiency is improved, the stirring and mixing time is saved, and the production quality is improved.

Description

Technical Field

[0001] This utility model relates to the field of high softening point asphalt preparation technology, specifically to an oxidation device for preparing high softening point asphalt. Background Technology

[0002] In recent decades, the deep processing of coal tar into industrial products such as anthracene oil, wash oil, refined naphthalene, and medium-temperature coal tar pitch has become very mature. However, the domestic production capacity of these products far exceeds the current market capacity, resulting in an unreasonable product structure and fierce market competition, especially for medium-temperature coal tar pitch products. At the same time, industries such as pitch-based carbon fiber, pitch-based spherical activated carbon, coating materials for graphite-based anode materials in lithium-ion batteries, electrolytic aluminum anodes, and magnesia-carbon bricks have put forward an urgent demand for high softening point coal tar pitch with high softening point (180-290℃), high residual carbon rate (63-78%), and good rheological properties. However, the high softening point coal tar pitch produced domestically due to problems with the oxidation equipment of medium-temperature coal tar pitch cannot meet the performance requirements of these fields.

[0003] Utility model application CN201921805602.9 discloses an air oxidation device for preparing high softening point coal tar pitch. The device comprises three sets of agitators arranged radially and vertically in a parallel and uniform manner. The top of the reactor has three sets of air inlets, a tail gas vacuum outlet, and a medium-temperature coal tar pitch feed inlet. Each air inlet is connected to an inlet pipe and a distributor, and the inlet pipes are interconnected.

[0004] The aforementioned device allows air to enter the reactor through a distributor, air inlet pipe, and air inlet, but it cannot filter or purify the air. Impurities in the air can easily enter the reactor and mix with the medium-temperature coal tar pitch. The agitator alone is used to stir the air and cause an oxidation reaction between the air and the medium-temperature coal tar pitch. The medium-temperature coal tar pitch at the bottom cannot fully contact the air, resulting in long stirring and mixing time, uneven mixing and oxidation reaction, low mixing efficiency, and affecting production quality.

[0005] It should be noted that the above content falls within the inventor's technical knowledge and does not necessarily constitute prior art. Utility Model Content

[0006] The purpose of this invention is to solve the above problems by designing an oxidation device for preparing high softening point asphalt.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] An oxidation apparatus for preparing high softening point asphalt includes an oxidation reactor. The oxidation reactor has a discharge port at its bottom, a feed port on one side of its top, an air inlet on one side of its top, and a vacuum port on the other side of its top. A fixed support is installed at the center of the top of the oxidation reactor, and an air filter box is mounted on the fixed support. The air filter box contains a dust filter and an activated carbon adsorption screen. A suction fan is installed on one side of the air filter box, with a suction pipe connecting the suction end of the suction fan to the air filter box and an air inlet pipe connecting the exhaust end of the suction fan to the air inlet. An air inlet is located at the other end of the air filter box.

[0009] Furthermore, a drive motor is mounted on the fixed bracket, and a drive shaft is mounted on the output end of the drive motor. The drive shaft extends through into the oxidation reactor. A first reciprocating lead screw is mounted on the bottom end of the drive shaft. A first fixing member is mounted on the bottom end of the first reciprocating lead screw. A second reciprocating lead screw is mounted on the bottom end of the first fixing member. A second fixing member is mounted on the bottom end of the second reciprocating lead screw. A connecting shaft is mounted on the bottom end of the second fixing member. An arc-shaped stirring plate is mounted on the bottom end of the connecting shaft. The arc-shaped stirring plate is in contact with the bottom wall of the oxidation reactor.

[0010] Furthermore, stirring blades are installed on both sides of the drive shaft, the first fixing member, and the second fixing member. Reciprocating sliders are threadedly connected to the first reciprocating screw and the second reciprocating screw. Lifting plates are installed on both sides of the reciprocating sliders. Guide grooves are provided on both sides of the inner wall of the oxidation reactor. A guide slider is installed at the end of the lifting plate away from the reciprocating slider. The guide slider is slidably connected to the guide groove.

[0011] Furthermore, a liquid level sensor is installed inside the oxidation reactor, and a vacuum system is connected to the vacuum port.

[0012] Furthermore, the air filter box has an upward-facing opening and a sealing cover. Two sets of locking blocks are installed on the air filter box and the sealing cover, and the dust filter and activated carbon adsorption screen are respectively locked between the two sets of locking blocks.

[0013] Furthermore, a sloping left side plate is installed on one side of the bottom of the lifting plate, and a sloping right side plate is installed on the other side of the bottom of the lifting plate, with the end of the sloping right side plate located below the end of the sloping left side plate.

[0014] Compared with existing technologies, this technical solution has the following beneficial effects:

[0015] By using dust filters and activated carbon adsorption nets to block impurities in the air, the impurities are prevented from entering the oxidation reactor and mixing with the medium-temperature coal tar pitch, thus improving production quality.

[0016] The medium-temperature coal tar pitch that has settled at the bottom of the oxidation reactor is stirred by the arc-shaped stirring plate. At the same time, the medium-temperature coal tar pitch at the bottom of the oxidation reactor can be scraped off during discharge, so that the medium-temperature coal tar pitch can be completely discharged.

[0017] By conveying the medium-temperature coal tar pitch upwards through the lifting plate, the medium-temperature coal tar pitch can be fully mixed with air to undergo an oxidation reaction, which improves mixing efficiency, saves mixing time, and improves production quality.

[0018] The guide slider and guide groove serve to guide and support the material. The inclined right and left plates can disperse the medium-temperature coal tar pitch below to both sides, reducing the resistance when the lifting plate moves downward, preventing excessive stress on the lifting plate and causing bending deformation, thus improving its service life. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of an oxidation device for preparing high softening point asphalt according to the present invention.

[0020] Figure 2 This is an enlarged top view of the lifting plate.

[0021] Figure 3 This is an enlarged side view of the lifting plate.

[0022] Figure 4 This is an enlarged cross-sectional view of the air filter box.

[0023] In the diagram: 1. Oxidation reactor; 2. Discharge port; 3. Feed port; 4. Air inlet; 5. Vacuum port; 6. Fixed bracket; 7. Air filter box; 8. Dust filter screen; 9. Activated carbon adsorption screen; 10. Fan; 11. Suction pipe; 12. Air inlet pipe; 13. Air inlet; 14. Drive motor; 15. Drive shaft; 16. First reciprocating screw; 17. First fixing component; 18. Second reciprocating screw; 19. Second fixing component; 20. Connecting shaft; 21. Arc-shaped stirring plate; 22. Stirring blade; 23. Reciprocating slider; 24. Lifting plate; 25. Guide chute; 26. Guide slider; 27. Liquid level sensor; 28. Sealing cover plate; 29. ​​Clamping block; 30. Sloping left side plate; 31. Sloping right side plate. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0025] In the description of this utility model, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, in the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0026] This utility model provides, for example Figure 1-4 An oxidation apparatus for preparing high softening point asphalt is shown, comprising an oxidation reactor 1, an outlet 2 at the bottom of the oxidation reactor 1, an inlet 3 on one side of the top of the oxidation reactor 1, an air inlet 4 on one side of the top of the oxidation reactor 1, a vacuum port 5 on the other side of the top of the oxidation reactor 1, a fixed support 6 installed at the center of the top of the oxidation reactor 1, an air filter box 7 installed on the fixed support 6, a dust filter screen 8 and an activated carbon adsorption screen 9 installed inside the air filter box 7, a suction fan 10 installed on one side of the air filter box 7, a suction pipe 11 connecting the suction end of the suction fan 10 to the air filter box 7, an air inlet pipe 12 connecting the air outlet end of the suction fan 10 to the air inlet 4, and an air inlet 13 at the other end of the air filter box 7.

[0027] Medium-temperature coal tar pitch is injected into oxidation reactor 1 through feed inlet 3 and stirred. The suction fan 10 starts working, and outside air enters the air filter box 7 through air inlet 13. The air is filtered through dust filter screen 8 and activated carbon adsorption screen 9. The filtered air enters oxidation reactor 1 through suction pipe 11, air inlet pipe 12 and air inlet 4. The air reacts with medium-temperature coal tar pitch. The dust filter screen 8 and activated carbon adsorption screen 9 block impurities in the air, preventing impurities from entering oxidation reactor 1 and mixing with medium-temperature coal tar pitch, thus improving production quality.

[0028] Refer to the instruction manual appendix Figure 1A drive motor 14 is mounted on the fixed bracket 6. A drive shaft 15 is mounted on the output end of the drive motor 14. The drive shaft 15 extends through into the oxidation reactor 1. A first reciprocating lead screw 16 is mounted on the bottom end of the drive shaft 15. A first fixing member 17 is mounted on the bottom end of the first reciprocating lead screw 16. A second reciprocating lead screw 18 is mounted on the bottom end of the first fixing member 17. A second fixing member 19 is mounted on the bottom end of the second reciprocating lead screw 18. A connecting shaft 20 is mounted on the bottom end of the second fixing member 19. An arc-shaped stirring plate 21 is mounted on the bottom end of the connecting shaft 20. The arc-shaped stirring plate 21 is in contact with the bottom wall of the oxidation reactor 1.

[0029] The drive motor 14 starts working, and the output end of the drive motor 14 drives the drive shaft 15 to rotate. The drive shaft 15 drives the first reciprocating screw 16, the first fixing part 17, the second reciprocating screw 18, the second fixing part 19, the connecting shaft 20 and the arc-shaped stirring plate 21 to rotate. The arc-shaped stirring plate 21 stirs the medium-temperature coal tar pitch that has settled at the bottom of the oxidation reactor 1. At the same time, the medium-temperature coal tar pitch at the bottom of the oxidation reactor 1 can be scraped off during discharge, and the medium-temperature coal tar pitch can be completely discharged.

[0030] Refer to the instruction manual appendix Figure 1 Included with instruction manual Figure 2 Stirring blades 22 are installed on both sides of the drive shaft 15, the first fixing member 17, and the second fixing member 19. Reciprocating sliders 23 are threadedly connected to the first reciprocating screw 16 and the second reciprocating screw 18. Lifting plates 24 are installed on both sides of the reciprocating sliders 23. Guide grooves 25 are provided on both sides of the inner wall of the oxidation reactor 1. A guide slider 26 is installed at the end of the lifting plate 24 away from the reciprocating slider 23. The guide slider 26 is slidably connected to the guide groove 25.

[0031] The drive shaft 15 drives the first reciprocating screw 16, the first fixed part 17, the second reciprocating screw 18, and the second fixed part 19 to rotate. The drive shaft 15, the first fixed part 17, and the second fixed part 19 drive the stirring blades 22 to rotate and stir the medium-temperature coal tar pitch. The rotation of the first reciprocating screw 16 and the second reciprocating screw 18 drives the reciprocating slider 23 to reciprocate and lift. The reciprocating slider 23 drives the lifting plate 24 to reciprocate and lift. The lifting plate 24 conveys the medium-temperature coal tar pitch upward, which can fully mix the medium-temperature coal tar pitch with air to undergo an oxidation reaction, improves the mixing efficiency, saves the mixing time, and improves the production quality. The lifting plate 24 drives the guide slider 26 to slide along the guide groove 25. The guide slider 26 and the guide groove 25 play a guiding and supporting role, which can prevent the lifting plate 24 from bending and deforming, and improve its service life.

[0032] Refer to the instruction manual appendix Figure 1The oxidation reactor 1 is equipped with a liquid level sensor 27, and the vacuum port 5 is connected to a vacuum system.

[0033] The exhaust gas is discharged from the vacuum port 5 through the vacuum system, which ensures the stability of the quality of high softening point coal tar pitch. The liquid level is monitored by the liquid level sensor 27, and the liquefied medium-temperature coal tar pitch can be replenished in time.

[0034] Refer to the instruction manual appendix Figure 4 The air filter box 7 has an upward-facing opening. The opening of the air filter box 7 is provided with a sealing cover plate 28. Two sets of locking blocks 29 are installed on the air filter box 7 and the sealing cover plate 28. The dust filter screen 8 and the activated carbon adsorption screen 9 are respectively locked between the two sets of locking blocks 29.

[0035] The sealing cover 28 can be removed from the air filter box 7. The dust filter 8 and the activated carbon adsorption screen 9 are respectively engaged between the two sets of engaging blocks 29, which facilitates the disassembly and replacement of the dust filter 8 and the activated carbon adsorption screen 9. The operation is simple and quick, improving work efficiency.

[0036] Refer to the instruction manual appendix Figure 3 A left-angled plate 30 is installed on one side of the bottom of the lifting plate 24, and a right-angled plate 31 is installed on the other side of the bottom of the lifting plate 24. The end of the right-angled plate 31 is located below the end of the left-angled plate 30.

[0037] During the descent of the lifting plate 24, the medium-temperature coal tar pitch below can be dispersed to both sides by the inclined right side plate 31 and the inclined left side plate 30, reducing the resistance when the lifting plate 24 moves downward, avoiding excessive force on the lifting plate 24 and causing bending deformation, thus improving its service life.

[0038] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An oxidation apparatus for preparing high softening point asphalt, comprising an oxidation reactor (1), wherein the oxidation reactor (1) is provided with a discharge port (2) at its bottom, characterized in that, The oxidation reactor (1) has a feed inlet (3) on one side of its top, an air inlet (4) on one side of its top, a vacuum port (5) on the other side of its top, a fixed support (6) at the center of the top of the oxidation reactor (1), an air filter box (7) on the fixed support (6), a dust filter (8) inside the air filter box (7), an activated carbon adsorption screen (9) inside the air filter box (7), a blower (10) on one side of the air filter box (7), a blower pipe (11) connecting the blower (10) to the air filter box (7), an air inlet pipe (12) connecting the blower (10) to the air inlet (4), and an air inlet (13) at the other end of the air filter box (7).

2. The oxidation apparatus for preparing high softening point asphalt according to claim 1, characterized in that, A drive motor (14) is installed on the fixed bracket (6). A drive shaft (15) is installed at the output end of the drive motor (14). The drive shaft (15) extends through into the oxidation reactor (1). A first reciprocating screw (16) is installed at the bottom end of the drive shaft (15). A first fixing member (17) is installed at the bottom end of the first reciprocating screw (16). A second reciprocating screw (18) is installed at the bottom end of the first fixing member (17). A second fixing member (19) is installed at the bottom end of the second reciprocating screw (18). A connecting shaft (20) is installed at the bottom end of the second fixing member (19). An arc-shaped stirring plate (21) is installed at the bottom end of the connecting shaft (20). The arc-shaped stirring plate (21) is in contact with the bottom wall of the oxidation reactor (1).

3. The oxidation apparatus for preparing high softening point asphalt according to claim 2, characterized in that, Stirring blades (22) are installed on both sides of the drive shaft (15), the first fixing member (17) and the second fixing member (19). Reciprocating sliders (23) are threadedly connected to the first reciprocating screw (16) and the second reciprocating screw (18). Lifting plates (24) are installed on both sides of the reciprocating sliders (23). Guide grooves (25) are provided on both sides of the inner wall of the oxidation reactor (1). A guide slider (26) is installed at the end of the lifting plate (24) away from the reciprocating slider (23). The guide slider (26) is slidably connected to the guide groove (25).

4. The oxidation apparatus for preparing high softening point asphalt according to claim 1, characterized in that, The oxidation reactor (1) is equipped with a liquid level sensor (27), and the vacuum port (5) is connected to a vacuum system.

5. The oxidation apparatus for preparing high softening point asphalt according to claim 1, characterized in that, The air filter box (7) has its opening facing upwards. The opening of the air filter box (7) is provided with a sealing cover plate (28). Two sets of locking blocks (29) are installed on the air filter box (7) and the sealing cover plate (28). The dust filter screen (8) and the activated carbon adsorption screen (9) are respectively locked between the two sets of locking blocks (29).

6. The oxidation apparatus for preparing high softening point asphalt according to claim 3, characterized in that, A left-side inclined plate (30) is installed on one side of the bottom of the lifting plate (24), and a right-side inclined plate (31) is installed on the other side of the bottom of the lifting plate (24). The end of the right-side inclined plate (31) is located below the end of the left-side inclined plate (30).

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