Aromatic hydrocarbon extraction selective hydrotreatment device

Abstract

The utility model relates to the technical field of general physical or chemical methods or devices, and discloses an aromatic hydrocarbon extraction selective hydrotreating device which comprises a reaction tank, the upper side of the reaction tank is fixedly connected with a hydrogen input pipe communicated with the inside, and the upper side of the reaction tank is fixedly connected with an oil inlet pipe communicated with the inside. Supporting legs are fixedly connected to the lower side of the reaction tank, an oil outlet pipe communicated with the interior is fixedly connected to the lower side of the reaction tank, a hydrogen collecting box is arranged on the front side of the oil outlet pipe, the outer surface of the reaction tank is fixedly sleeved with a cooling shell, and a water inlet pipe communicated with the interior is arranged on the upper side of the cooling shell. And a drainage pipe communicating with the interior is arranged on the front side of the cooling shell, and a cleaning mechanism is arranged on the cooling shell, in this way, the interior of the equipment can be automatically cleaned while the equipment is cooled, the situation that incrustation is accumulated in the equipment is avoided, and then the situation that the cooling effect is reduced due to incrustation accumulation is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of general physical or chemical methods or devices, in particular to an aromatics extraction selective hydrogenation processing device. Background Art

[0002] Aromatic extraction, also known as aromatic extraction, is the process of separating aromatics from a hydrocarbon mixture using an extractant. Hydrotreating refers to the process of converting harmful impurities such as sulfur, oxygen, and nitrogen in oil products into corresponding hydrogen sulfide, water, and ammonia under hydrogen pressure and catalyst to remove them, and to hydrogenate and saturate olefins and diolefins, and partially hydrogenate and saturate aromatics to improve the quality of oil products.

[0003] However, hydroprocessing is an exothermic reaction, which will cause the temperature of the reactor to rise rapidly. If the reactor is not sufficiently cooled down at this time, it may cause serious damage to the equipment in the reaction system. At the same time, due to the difference between thermal expansion and contraction, excessive temperature may cause leakage in the hydroprocessing device, which may cause danger. Therefore, cooling equipment is needed to cool the device. However, water cooling method will easily cause scale accumulation in the cooling equipment during long-term use, which will reduce the cooling effect of the device. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies in the prior art, the utility model provides an aromatics extraction selective hydroprocessing device, which has the function of automatically cleaning the inside of the device while cooling the device, thereby avoiding the accumulation of scale inside the device, and further avoiding the reduction of the cooling effect due to scale accumulation.

[0006] (II) Technical solution

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an aromatics extraction selective hydroprocessing device, comprising a reaction tank, a hydrogen inlet pipe communicating with the interior is fixedly connected to the upper side of the reaction tank, and an oil inlet pipe communicating with the interior is fixedly connected to the upper side of the reaction tank;

[0008] The lower side of the reaction tank is fixedly connected with a support leg, the lower side of the reaction tank is fixedly connected with an oil outlet pipe communicating with the inside, a switch valve is arranged on the oil outlet pipe, a hydrogen collection box is arranged on the front side of the oil outlet pipe, a pipeline of the hydrogen collection box is connected with the oil outlet pipe, and a control switch is arranged on the front side of the hydrogen collection box;

[0009] A cooling shell is fixedly sleeved on the outer surface of the reaction tank, and a water inlet pipe communicating with the interior is arranged on the upper side of the cooling shell;

[0010] A drain pipe communicating with the interior is arranged on the front side of the cooling shell, and a switch valve is also arranged on the drain pipe;

[0011] A cleaning mechanism is provided on the cooling shell, which can clean the inner surface of the cooling shell during operation, thereby preventing scale from accumulating on the inner surface of the cooling shell.

[0012] The cleaning mechanism comprises a rotating ring, a bevel gear ring, two fixed rods, two first cleaning blocks, two second cleaning blocks, a motor assembly and a bevel gear.

[0013] Preferably, the rotating ring is rotatably connected to the bottom wall of the cooling shell, the bevel gear ring is fixedly sleeved on the outer surface of the rotating ring, and two fixing rods are respectively fixedly connected to the upper side of the rotating ring.

[0014] Preferably, the two fixing rods are arranged on the left and right, the two first cleaning blocks are fixedly connected to the outer surfaces of the two fixing rods respectively, and the two first cleaning blocks are arranged on opposite sides of the two fixing rods.

[0015] Preferably, the two second cleaning blocks are respectively fixedly connected to the outer surfaces of the two fixing rods, and the two second cleaning blocks are arranged on the sides of the two fixing rods away from each other.

[0016] Preferably, both the first cleaning block and the second cleaning block are capable of contacting the inner surface of the cooling housing, wherein the second cleaning block is a C-shaped block;

[0017] The motor assembly is fixedly connected to the left side of the outer surface of the cooling shell, and the output end of the motor assembly is fixedly connected to the transmission shaft.

[0018] Preferably, the right end of the transmission shaft rotates and extends into the interior of the cooling housing, the bevel gear is fixedly connected to the right end of the transmission shaft, and the bevel gear is meshedly connected with the rotating ring;

[0019] A temperature detector is fixedly connected to the upper side of the cooling shell, and the temperature detector can detect the temperature of the cooling water inside the cooling shell.

[0020] (III) Beneficial effects

[0021] Compared with the prior art, the utility model provides an aromatics extraction selective hydroprocessing device, which has the following beneficial effects:

[0022] (1) When the aromatics extraction selective hydrogenation treatment device is reacting, cooling water is added to the interior of the cooling shell through the water inlet pipe, and the motor assembly is started at the same time. After the motor assembly is driven, it will scrape the inner surface of the cooling shell, so that the scale just produced can be easily scraped off, thereby avoiding the situation that the scale accumulates on the inner surface of the cooling shell and is difficult to clean. The scraped scale can then be discharged through the drain pipe, and finally the oil that has completed the reaction can be discharged through the oil outlet pipe. In this way, the device can be cooled and the interior of the equipment can be automatically cleaned at the same time, thereby avoiding the situation that the scale will accumulate inside the equipment, thereby avoiding the reduction of the cooling effect due to the accumulation of scale.

[0023] (2) After the oil is drained from the aromatics extraction selective hydroprocessing unit, some unreacted hydrogen will still remain in the reaction tank. At this time, the switch valve on the drain pipe is closed and the hydrogen collection box is started, so that the unreacted hydrogen in the reaction tank can be sucked into the hydrogen collection box through the oil outlet pipe, thereby collecting the remaining hydrogen in the bevel gear and recycling it. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the structure of an aromatics extraction selective hydroprocessing device of the utility model;

[0025] Figure 2 This is a schematic diagram of the internal connection structure of the cooling shell of the utility model;

[0026] Figure 3 for Figure 2 An enlarged schematic diagram of point A.

[0027] In the figure: 1. reaction tank; 2. hydrogen input pipe; 3. oil inlet pipe; 4. support leg; 5. oil outlet pipe; 6. hydrogen collection box; 7. cooling shell; 8. water inlet pipe; 9. drain pipe; 10. temperature detector; 11. rotating ring; 12. bevel gear ring; 13. fixing rod; 14. first cleaning block; 15. second cleaning block; 16. motor assembly; 17. transmission shaft; 18. bevel gear. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] See also Figures 1 to 3The utility model provides a new technical solution: an aromatics extraction selective hydroprocessing device, comprising a reaction tank 1, a hydrogen input pipe 2 communicating with the interior is fixedly connected to the upper side of the reaction tank 1, an oil inlet pipe 3 communicating with the interior is fixedly connected to the upper side of the reaction tank 1, a support leg 4 is fixedly connected to the lower side of the reaction tank 1, an oil outlet pipe 5 communicating with the interior is fixedly connected to the lower side of the reaction tank 1, a switch valve is arranged on the oil outlet pipe 5, wherein the reaction tank 1 is an existing mechanism, so it is not explained too much, a hydrogen collecting box 6 is arranged on the front side of the oil outlet pipe 5, a pipeline of the hydrogen collecting box 6 is connected to the oil outlet pipe 5, and the hydrogen collecting box 6 A control switch is provided on the front side, a cooling shell 7 is fixedly sleeved on the outer surface of the reaction tank 1, a water inlet pipe 8 connected to the interior is provided on the upper side of the cooling shell 7, a drain pipe 9 connected to the interior is provided on the front side of the cooling shell 7, a switch valve is also provided on the drain pipe 9, and a cleaning mechanism is provided on the cooling shell 7. The cleaning mechanism can clean the inner surface of the cooling shell 7 during operation to avoid scale accumulation on the inner surface of the cooling shell 7. The cleaning mechanism includes a rotating ring 11, a bevel gear ring 12, two fixed rods 13, two first cleaning blocks 14, two second cleaning blocks 15, a motor assembly 16 and a bevel gear 18.

[0030] Furthermore, the rotating ring 11 is rotatably connected to the bottom wall of the cooling shell 7, the bevel gear ring 12 is fixedly sleeved on the outer surface of the rotating ring 11, the two fixed rods 13 are respectively fixedly connected to the upper side of the rotating ring 11, the two fixed rods 13 are arranged on the left and right, the two first cleaning blocks 14 are respectively fixedly connected to the outer surfaces of the two fixed rods 13, the two first cleaning blocks 14 are arranged on the opposite sides of the two fixed rods 13, the two second cleaning blocks 15 are respectively fixedly connected to the outer surfaces of the two fixed rods 13, the two second cleaning blocks 15 are arranged on the side away from each other of the two fixed rods 13, and the first A cleaning block 14 and a second cleaning block 15 can both contact the inner surface of the cooling shell 7, wherein the second cleaning block 15 is a C-shaped block, a motor assembly 16 is fixedly connected to the left side of the outer surface of the cooling shell 7, an output end of the motor assembly 16 is fixedly connected to a transmission shaft 17, the right end of the transmission shaft 17 rotates and extends into the interior of the cooling shell 7, a bevel gear 18 is fixedly connected to the right end of the transmission shaft 17, the bevel gear 18 is meshed with the rotating ring 11, and a temperature detector 10 is fixedly connected to the upper side of the cooling shell 7, and the temperature detector 10 can detect the temperature of the cooling water inside the cooling shell 7.

[0031] Furthermore, when starting work, oil is added to the interior of the reaction tank 1 through the oil inlet pipe 3, and then hydrogen is added through the hydrogen input pipe 2, and then it is reacted. Heat will be released during the reaction. At this time, cooling water is added to the interior of the cooling shell 7 through the water inlet pipe 8, and then the cooling water will cool the interior of the reaction tank 1. At the same time, the temperature detector 10 will display the cooling water temperature in real time to facilitate the drainage and water addition of the cooling water. At the same time, the motor assembly 16 is started, and the motor assembly 16 starts to transmit power from the output end, driving the transmission shaft 17 to rotate synchronously, the transmission shaft 17 drives the bevel gear 18 to start rotating synchronously, the bevel gear 18 drives the meshing bevel gear ring 12 to start rotating, the bevel gear ring 12 drives the rotating ring 11 to start rotating synchronously, the rotating ring 11 drives the two fixed rods 13 to start rotating, the two fixed rods 13 drive the two first cleaning blocks 14 and the two second cleaning blocks 15 to start rotating synchronously. During the rotation, the first cleaning block 14 and the second cleaning block 15 will scrape the inner surface of the cooling shell 7, and the scale just produced can be easily scraped off, thereby avoiding the situation that the scale accumulates on the inner surface of the cooling shell 7 and is difficult to clean. After that, the scraped scale can be discharged through the drain pipe 9, and finally the oil that has completed the reaction can be discharged through the oil outlet pipe 5. After the oil is discharged, there will still be some unreacted hydrogen in the reaction tank 1. At this time, the switch valve on the drain pipe 9 is closed and the hydrogen collection box 6 is started, and the unreacted hydrogen in the reaction tank 1 can be sucked into the hydrogen collection box 6 through the oil outlet pipe 5, so that the remaining hydrogen in the bevel gear 18 can be collected and recycled. In this way, the device can be cooled and the inside of the equipment can be automatically cleaned at the same time, avoiding the situation that scale will accumulate inside the equipment, thereby avoiding the reduction of the cooling effect due to the accumulation of scale.

[0032] Working principle: When starting to work, add oil to the inside of the reaction tank 1 through the oil inlet pipe 3, and then add hydrogen through the hydrogen input pipe 2, and then make it react. Heat will be released during the reaction. At this time, cooling water is added to the inside of the cooling shell 7 through the water inlet pipe 8, and then the cooling water will cool the inside of the reaction tank 1. At the same time, the temperature detector 10 will display the cooling water temperature in real time to facilitate the drainage and water addition of the cooling water. At the same time, the motor assembly 16 is started, and the motor assembly 16 starts to transmit power from the output end, driving the transmission shaft 17 to rotate synchronously, the transmission shaft 17 drives the bevel gear 18 to start rotating synchronously, the bevel gear 18 drives the meshing bevel gear ring 12 to start rotating, the bevel gear ring 12 drives the rotating ring 11 to start rotating synchronously, and the rotating ring 11 drives the two fixed rods 13 to start Rotate, the two fixed rods 13 drive the two first cleaning blocks 14 and the two second cleaning blocks 15 to start rotating synchronously. During the rotation process, the first cleaning block 14 and the second cleaning block 15 will scrape the inner surface of the cooling shell 7, and the scale just produced can be easily scraped off, thereby avoiding the situation that the scale accumulates on the inner surface of the cooling shell 7 and is difficult to clean. Then the scraped scale can be discharged through the drain pipe 9, and finally the oil that has completed the reaction can be discharged through the oil outlet pipe 5. After the oil is discharged, there will still be some unreacted hydrogen in the reaction tank 1. At this time, close the switch valve on the drain pipe 9 and start the hydrogen collecting box 6, and then the unreacted hydrogen in the reaction tank 1 can be sucked into the hydrogen collecting box 6 through the oil outlet pipe 5, so that the remaining hydrogen in the bevel gear 18 can be collected and recycled.

[0033] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An aromatics extraction selective hydroprocessing device, comprising a reaction tank (1), a hydrogen gas inlet pipe (2) communicating with the interior of the reaction tank (1) being fixedly connected to the upper side of the reaction tank (1), and an oil inlet pipe (3) communicating with the interior of the reaction tank (1) being fixedly connected to the upper side of the reaction tank (1); The lower side of the reaction tank (1) is fixedly connected to a support leg (4), the lower side of the reaction tank (1) is fixedly connected to an oil outlet pipe (5) communicating with the interior, and an on-off valve is arranged on the oil outlet pipe (5), which is characterized in that: A hydrogen collection box (6) is arranged on the front side of the oil outlet pipe (5), a pipeline of the hydrogen collection box (6) is connected to the oil outlet pipe (5), and a control switch is arranged on the front side of the hydrogen collection box (6); A cooling shell (7) is fixedly sleeved on the outer surface of the reaction tank (1), and a water inlet pipe (8) communicating with the interior is arranged on the upper side of the cooling shell (7); The front side of the cooling shell (7) is provided with a drainage pipe (9) communicating with the interior, and the drainage pipe (9) is also provided with an on-off valve; A cleaning mechanism is provided on the cooling shell (7), and the cleaning mechanism can clean the inner surface of the cooling shell (7) during operation, thereby preventing scale from accumulating on the inner surface of the cooling shell (7); The cleaning mechanism comprises a rotating ring (11), a bevel gear ring (12), two fixed rods (13), two first cleaning blocks (14), two second cleaning blocks (15), a motor assembly (16) and a bevel gear (18).

2. The aromatics extraction selective hydroprocessing unit according to claim 1, characterized in that: The rotating ring (11) is rotatably connected to the bottom wall of the cooling shell (7), the bevel gear ring (12) is fixedly sleeved on the outer surface of the rotating ring (11), and two fixing rods (13) are respectively fixedly connected to the upper side of the rotating ring (11).

3. An aromatics extraction selective hydroprocessing unit according to claim 2, characterized in that: The two fixed rods (13) are arranged on the left and right, and the two first cleaning blocks (14) are respectively fixedly connected to the outer surfaces of the two fixed rods (13), and the two first cleaning blocks (14) are arranged on opposite sides of the two fixed rods (13).

4. The aromatics extraction selective hydroprocessing unit according to claim 1, characterized in that: The two second cleaning blocks (15) are respectively fixedly connected to the outer surfaces of the two fixing rods (13), and the two second cleaning blocks (15) are arranged on the sides of the two fixing rods (13) that are away from each other.

5. The aromatics extraction selective hydroprocessing unit according to claim 3, characterized in that: The first cleaning block (14) and the second cleaning block (15) are both capable of contacting the inner surface of the cooling shell (7), wherein the second cleaning block (15) is a C-shaped block; The motor assembly (16) is fixedly connected to the left side of the outer surface of the cooling housing (7), and the output end of the motor assembly (16) is fixedly connected to a transmission shaft (17).

6. The aromatics extraction selective hydroprocessing unit according to claim 5, characterized in that: The right end of the transmission shaft (17) rotates and extends into the interior of the cooling housing (7), the bevel gear (18) is fixedly connected to the right end of the transmission shaft (17), and the bevel gear (18) is meshedly connected with the rotating ring (11); A temperature detector (10) is fixedly connected to the upper side of the cooling shell (7), and the temperature detector (10) can detect the temperature of cooling water inside the cooling shell (7).

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