A deep desulfurization and dearomatization system and method for diesel fractions

Abstract

This invention relates to the field of desulfurization and dearomatization system technology, and proposes a deep desulfurization and dearomatization system and method for diesel fractions. It employs multiple relatively independent spaces to form diesel fractions and perform desulfurization and dearomatization operations. During operation, each part is independent yet continuous, enabling better comprehensive and continuous operation of diesel fractions and desulfurization and dearomatization. It is more flexible and practical. The system includes a main body and a space-forming system. The main body includes an annular heating furnace with an open ring fixedly connected inside. The bottom end of the open ring is connected to a feed quick-connect pipe and a discharge quick-connect pipe. The space-forming system includes a mounting synchronization ring and a servo motor. The annular heating furnace has an annular opening, and the mounting synchronization ring is rotatably connected within the annular opening. The servo motor is mounted on the annular heating furnace and is used to adjust the rotation of the mounting synchronization ring relative to the annular opening. Multiple fixed partition plates are fixedly connected to the bottom end of the mounting synchronization ring.

Description

Technical Field

[0001] This invention relates to the field of desulfurization and dearomatization systems, specifically to a deep desulfurization and dearomatization system and method for diesel fractions. Background Art

[0002] As is well known, diesel fractions refer to components with boiling points suitable for use as diesel fuel, which are separated from crude oil and other raw materials through processes such as distillation. To improve the environmental friendliness of the prepared diesel fuel, we propose a deep desulfurization and dearomatization system and method for diesel fractions. This system reduces the sulfur and aromatic hydrocarbon content in the prepared diesel fuel while simultaneously preparing the diesel fractions, thereby reducing the environmental impact of diesel fuel after use.

[0003] A search revealed Chinese patent application CN202311853749.6, which discloses a hydrotreated diesel fractionation device. The device comprises a main body, a mixing mechanism, and a scraping mechanism. An oil inlet is connected to one side of the main body, penetrating the entire device. An air inlet is also connected to the main body, penetrating the entire device. The mixing mechanism is connected to the main body and includes stirring blades. A pair of frames are housed within the main body, with rotating stirring blades housed within the frames. The scraping mechanism is connected to the main body and includes a pair of toothed discs. Connecting rods are mounted on the toothed discs, with bearings connected to one end of each connecting rod. The frames are connected to the connecting rods. During operation, the corresponding mechanisms on the hydrotreated diesel fractionation device ensure that during the hydrogenation reaction, the mixture passes through the main body. Various stirring methods can be used to thoroughly mix hydrogen and diesel. Chinese patent application number CN01134272.2 discloses a method for deep desulfurization and dearomatic removal of diesel. It is roughly described as follows: the feedstock oil is mixed with hydrogen and enters the first reactor, where it contacts a hydrotreating catalyst, a hydrocracking catalyst, or a hydrorefining catalyst. The reaction effluent is stripped under high temperature and pressure by a hydrogen stripping tower and then mixed with hydrogen before entering the second reactor, where it contacts a conventional hydrorefining catalyst. The effluent from the second reactor enters a high-pressure separator, a low-pressure separator, and a fractionation tower in sequence. The fractionation tower separates the reaction products into naphtha and diesel fractions. The hydrogen-rich gas stream separated from the high-pressure separator and the high-pressure stripping tower is mixed with fresh hydrogen and divided into two parts, which are sent to the first reactor and the second reactor respectively.

[0004] Although both of the above-mentioned existing technical solutions can achieve hydrogenation in the diesel fractionation process, analysis of the accompanying drawings clearly shows that the equipment body in the former and the overall system of the first reactor, second reactor, high-pressure separator, low-pressure separator and fractionation tower in the latter are relatively fixed structures. In actual operation, the substances that need to be fractionated diesel enter multiple processing spaces in sequence, and the multiple processing spaces are connected in series, so the flexibility of use needs to be further improved. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a diesel fraction deep desulfurization and dearomatization system and method. It employs multiple relatively independent spaces to form diesel fraction and desulfurization and dearomatization operations. During the operation, each part is independent yet continuous, which can better achieve comprehensive, thorough and continuous diesel fraction and desulfurization and dearomatization operations. It is more flexible and practical to use.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a deep desulfurization and dearomatization system for diesel fractions, comprising a device body and a space forming system. The device body includes an annular heating furnace, with an open ring fixedly connected inside the annular heating furnace. The bottom end of the open ring is connected to a feed quick-connect pipe and a discharge quick-connect pipe. The space forming system includes a mounting synchronization ring and a servo motor. The annular heating furnace has an annular opening, and the mounting synchronization ring is rotatably connected inside the annular opening. The servo motor is mounted on the annular heating furnace and is used to adjust the rotation of the mounting synchronization ring relative to the annular opening. The bottom end of the mounting synchronization ring is fixedly connected to multiple fixed partition plates, and the open ring is divided into multiple independent spaces by the multiple fixed partition plates. A fixed mounting ring is rotatably connected outside the mounting synchronization ring and is fixedly connected to the annular heating furnace. Two gas filling pipes are connected to the fixed mounting ring, and two composite stirring and exhaust components are mounted on the fixed mounting ring. The mounting synchronization ring has two vents, which are matched with the composite stirring and exhaust components and also matched with the gas filling pipes.

[0007] Preferably, both of the composite stirring and venting components include a fixed mounting pipe. The top of the fixed mounting ring has two stepped mounting holes. The two fixed mounting pipes are respectively fixedly connected to the two stepped mounting holes. Both fixed mounting pipes are connected to a side exhaust pipe. Both fixed mounting pipes are slidably connected to a lifting pipe. Both lifting pipes are fixedly connected to a dividing plate. Both dividing plates are fixedly connected to a connecting spring. The two connecting springs are respectively fixedly connected to the two fixed mounting pipes. Both lifting pipes are equipped with a polarization motor. Both dividing plates are equipped with a one-way valve. Both lifting pipes are equipped with a cutting stirring component.

[0008] Preferably, both of the cutting-in stirring components include a spiral stirring plate, and each of the two spiral stirring plates is fixedly connected to an internally threaded cylinder. Each of the two internally threaded cylinders is threadedly connected to a threaded post. The two threaded posts are respectively fixedly connected to the two fixed mounting pipes. Each of the two spiral stirring plates is fixedly connected to a support ring, and the two support rings are respectively rotatably connected to the two lifting pipes.

[0009] Preferably, the fixed installation tube has a strip-shaped opening on its side, a suspension frame is fixedly connected to the outside of the lifting tube, the suspension frame extends out through the strip-shaped opening, the polarization motor is mounted on the suspension frame, and an eccentric block is mounted on the rotation shaft of the polarization motor.

[0010] Preferably, the bottom end of the mounting synchronization ring is provided with multiple arc-shaped grooves, each of the multiple arc-shaped grooves is connected to an arc-shaped spacer, each of the multiple arc-shaped spacers is connected to the open ring, each of the multiple arc-shaped spacers is fixedly connected to an arc-shaped spring, each of the multiple arc-shaped springs is fixedly connected to a multiple of the fixed partition plates, and two electric drive components are installed on the fixed mounting ring, the electric drive components are used to drive the arc-shaped spacers.

[0011] Preferably, the electric drive component includes an electric lifting rod, which is installed at the top of the fixed mounting ring. A ramp is installed at the bottom of the lifting rod of the electric lifting rod, and a pushing slope that matches the ramp is provided on the arc-shaped partition.

[0012] Preferably, the mounting synchronization ring has multiple inlets, multiple fixed partition plates are located on one side of the multiple inlets, and multiple arc-shaped partitions are located on the other side of the multiple inlets. The inlets are used for the passage of the ramp blocks.

[0013] Preferably, a drive spur gear is mounted on the output shaft of the servo motor, the drive spur gear meshes with a transmission end gear ring, and the transmission end gear ring is fixedly connected to the top of the mounting synchronization ring.

[0014] Preferably, the annular heating furnace is equipped with a support mounting base, the support mounting base is provided with multiple fixed mounting ears, and the support mounting base is provided with a passage notch that matches the feed quick-connect pipe and the discharge quick-connect pipe.

[0015] An operation method for a deep desulfurization and dearomatization system for diesel fractions includes the following steps:

[0016] S1. Before operation, first install control circuits for the servo motor, the ring furnace and the compound stirring exhaust assembly. Then install crude oil supply and delivery pipelines for the feed quick-connect pipe, connect the discharge quick-connect pipe to the external delivery pipeline, connect the gas filling pipe to the hydrogen addition pipeline, and install oil and gas exhaust pipelines for the compound stirring exhaust assembly.

[0017] S2. In actual operation, first connect the control power supply of the servo motor, the ring heating furnace and the composite stirring and exhaust assembly. Then the ring heating furnace runs to heat the open ring. The servo motor is powered on to drive the rotation of the installation synchronization ring relative to the open ring. This drives the rotation of multiple fixed partition plates within the open ring so that multiple independent spaces within the open ring can move relative to each other.

[0018] S3. When multiple independent spaces pass through the feed quick-connect pipe in sequence, the external crude oil supply pipeline forms the crude oil supply in the corresponding connected independent space through the feed quick-connect pipe. When multiple independent spaces pass through the discharge quick-connect pipe in sequence, the heavy oil remaining after distillation in the independent space will be discharged externally through the discharge quick-connect pipe and the external pipeline.

[0019] S4. With the sequential rotation of multiple independent spaces, when the vent on the synchronous ring rotates to connect with the gas filling pipe, the hydrogen filling pipe adds hydrogen to the corresponding independent space through the gas filling pipe. After the hydrogen is added, the corresponding independent space will pass through the composite stirring and exhaust assembly in sequence. When the independent space rotates and moves to the lower side of the composite stirring and exhaust assembly, the crude oil in the independent space will be stirred and the oil and gas will be extracted and discharged.

[0020] S5. The discharged oil and gas will be guided and transported through the oil and gas discharge pipeline for processing in the next process. After the crude oil is hydrotreated once, it will pass through another gas filling pipe along with the movement of the independent space to perform a second hydrotreating operation on the crude oil in the independent space. After hydrotreating, a second stirring and oil and gas extraction operation will also be carried out. Finally, when the independent space is connected to the discharge quick-connect pipe, the remaining heavy oil in the fraction of the independent space will be discharged to facilitate the next round of crude oil being fed back into the independent space, thereby realizing the continuous production of diesel from crude oil fractions.

[0021] Compared with the prior art, the present invention provides a deep desulfurization and dearomatization system and method for diesel fractions, which has the following beneficial effects:

[0022] (1) In this invention, the design of the equipment body provides a basic heating and space creation structure for diesel fractions, a basic heating treatment space for crude oil to be fractionated, and a basic installation structure for the subsequent space formation system.

[0023] (2) In this invention, by designing a space forming system and matching it with an open ring to form a space separation structure, multiple independent spaces are created on the one hand, and continuous operating power is provided for crude oil processing on the other hand.

[0024] (3) In this invention, by designing a composite stirring and exhaust component, multiple independent spaces are matched to form a functional structure for auxiliary stirring and oil and gas extraction, which can realize the use of a set of equipment with multiple independent spaces, resulting in higher equipment utilization and greater practicality. Attached Figure Description

[0025] Figure 1 This is a three-dimensional structural schematic diagram showing a partial cross-section of the present invention;

[0026] Figure 2 For the present invention Figure 1 A magnified schematic diagram of the partial structure at point A in the middle;

[0027] Figure 3 For the present invention Figure 1 A magnified schematic diagram of the local structure at point B;

[0028] Figure 4 For the present invention Figure 1 A magnified schematic diagram of the structure at point C in the middle;

[0029] Figure 5 For the present invention Figure 1 A magnified schematic diagram of the local structure at point D;

[0030] Figure 6 This is a partial cross-sectional three-dimensional structural schematic diagram of the side-leading external exhaust pipe, rising pipe, and connecting spring of the present invention.

[0031] Figure 7 This is a partial cross-sectional three-dimensional structural schematic diagram of the side-leading external drain pipe, the dividing plate, and the one-way valve of the present invention.

[0032] Figure 8 This is a three-dimensional structural diagram of the cooperation between the lifting tube and the cantilever frame of the present invention;

[0033] Figure 9 This is a three-dimensional structural diagram of the fixed partition plate, arc-shaped partition block, and arc-shaped spring of the present invention.

[0034] Figure 10 This is a three-dimensional structural diagram of the entire invention;

[0035] Figure 11 This is a three-dimensional structural diagram of the invention viewed from below.

[0036] Figure 12 This is a three-dimensional structural diagram showing the disassembled fit between the open ring and the mounting synchronization ring of the present invention.

[0037] Figure 13 This is a partial cross-sectional three-dimensional structural schematic diagram of the sliding tube, stabilizing spring, and inner liner column of the present invention.

[0038] In the diagram: 1. Annular heating furnace; 2. Open ring; 3. Feed quick-connect pipe; 4. Discharge quick-connect pipe; 5. Installation synchronization ring; 6. Servo motor; 7. Fixed partition plate; 8. Fixed mounting ring; 9. Gas supply pipe; 10. Vent; 11. Fixed mounting pipe; 12. Side-exit pipe; 13. Lifting pipe; 14. Connecting spring; 15. Polarizing motor; 16. Partition plate; 17. One-way valve; 18. Spiral stirring plate; 19. Internally threaded cylinder; 20. Threaded column. ; 21. Support ring; 22. Strip opening; 23. Cantilever frame; 24. Eccentric block; 25. Arc groove; 26. Arc partition; 27. Arc spring; 28. Electric lifting rod; 29. ​​Slope block; 30. Pushing slope; 31. Inlet; 32. Drive spur gear; 33. Transmission end gear ring; 34. Support mounting base; 35. Fixed mounting ear; 36. Through notch; 37. Sliding tube; 38. Stabilizing spring; 39. Inner liner column; 40. Outer cone plate. Detailed Implementation

[0039] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0040] For examples, please refer to Figures 1-13A deep desulfurization and dearomatization system for diesel fractions includes a main body and a space-forming system. The main body includes an annular furnace 1, with an open ring 2 fixedly connected inside. The bottom end of the open ring 2 is connected to a feed quick-connect pipe 3 and a discharge quick-connect pipe 4. The design of the main body provides basic heating and space-forming structures for the diesel fractions, basic heating treatment space for the crude oil being fractionated, and a basic installation structure for the subsequent space-forming system. The space-forming system includes a mounting synchronization ring 5 and a servo motor 6. The annular furnace 1 has an annular opening, and the mounting synchronization ring 5 is rotatably connected within the annular opening. The servo motor 6 is mounted on the annular furnace 1. A drive spur gear 32 is mounted on the output shaft of the servo motor 6. The drive spur gear 32 meshes with a transmission end gear ring 33, which is fixedly connected to the top of the mounting synchronization ring 5. The servo motor 6 is used to adjust the rotation of the mounting synchronization ring 5 relative to the annular opening. Multiple fixed partition plates 7 are fixedly connected to the bottom of the mounting synchronization ring 5, dividing the opening ring 2 into multiple independent spaces. A fixed mounting ring 8 is rotatably connected to the outside of the mounting synchronization ring 5. The fixed mounting ring 8 is fixedly connected to the annular heating furnace 1. Two gas supply pipes 9 are connected to the fixed mounting ring 8. Two composite stirring and exhaust components are mounted on the fixed mounting ring 8. Two vents 10 are provided on the mounting synchronization ring 5. The vent 10 is matched with the composite stirring exhaust assembly and the air supply pipe 9. Through the design of the space forming system, the matching open ring 2 forms a space-separating structure, which on the one hand realizes the creation of multiple independent spaces, and on the other hand provides continuous operating power for crude oil processing. The bottom end of the mounting synchronization ring 5 is provided with multiple arc-shaped grooves 25, and each arc-shaped groove 25 is connected to an arc-shaped partition 26. Each arc-shaped partition 26 is connected to the open ring 2, and each arc-shaped partition 26 is fixedly connected to an arc-shaped spring 27. Each arc-shaped spring 27 is fixedly connected to multiple fixed partition plates 7. Two electric drive components are installed on the fixed mounting ring 8. The electric drive components are used for the arc-shaped partitions 26. The drive, an electric drive component, includes an electric lifting rod 28, which is mounted on the top of a fixed mounting ring 8. A ramp block 29 is mounted on the bottom end of the lifting rod of the electric lifting rod 28. An arc-shaped partition 26 is provided with a pushing slope 30 that matches the ramp block 29. When the electric lifting rod 28 operates, causing the ramp block 29 to change relative height, the relative pushing action between the ramp block 29 and the pushing slope 30 can cause the arc-shaped partition 26 to adjust its relative position at the bottom end of the mounting synchronization ring 5. This causes changes in the spatial volume of multiple independent spaces, thereby pressurizing the crude oil in the independent spaces, promoting the release of gas from the crude oil, and reducing the gas content in the crude oil and the oil and gas content around the crude oil.

[0041] It should be further explained that both composite stirring and venting components include fixed mounting pipes 11. Two stepped mounting holes are provided at the top of the fixed mounting ring 8. The two fixed mounting pipes 11 are respectively fixedly connected to the two stepped mounting holes. Both fixed mounting pipes 11 are connected to side-exit pipes 12. Lifting pipes 13 are slidably connected inside both fixed mounting pipes 11. Dividing plates 16 are fixedly connected inside both lifting pipes 13. Connecting springs 14 are fixedly connected to both dividing plates 16. The two connecting springs 14 are respectively fixedly connected to the two fixed mounting pipes 11. Polarization motors 1 are installed on both lifting pipes 13. 5. One-way valves 17 are installed on both dividing plates 16. Cutting-in agitators are installed inside both lifting pipes 13. Each cutting-in agitator includes a spiral agitator plate 18. Internally threaded cylinders 19 are fixedly connected inside each spiral agitator plate 18. Threaded posts 20 are threadedly connected inside each internally threaded cylinder 19. The two threaded posts 20 are respectively fixedly connected to two fixed mounting pipes 11. Support rings 21 are fixedly connected to the outside of each spiral agitator plate 18. The two support rings 21 are rotatably connected to the two lifting pipes 13. A strip-shaped opening 22 is provided on the side of each fixed mounting pipe 11. A suspension device is fixedly connected to the outside of each lifting pipe 13. The extension frame 23 extends through the strip-shaped opening 22. The polarization motor 15 is mounted on the extension frame 23, and an eccentric block 24 is mounted on the rotary shaft of the polarization motor 15. Through the design of the composite stirring and exhaust assembly, multiple independent spaces are matched to form a functional structure for auxiliary stirring and oil and gas extraction. It can realize the use of one set of equipment with multiple independent spaces, which makes the equipment more efficient and practical. Multiple extension inlets 31 are opened on the installation synchronization ring 5. Multiple fixed partition plates 7 are located on one side of the multiple extension inlets 31, and multiple arc-shaped partitions 26 are located on the other side of the multiple extension inlets 31. 1 is used for the passage of the slope block 29. When the slope block 29 is inserted between the fixed partition plate 7 and the arc-shaped partition 26 through the extension port 31, it can act on the pushing slope 30, causing the arc-shaped partition 26 to move relative to the arc-shaped groove 25, thereby changing the space between the fixed partition plate 7 and the arc-shaped partition 26. The annular heating furnace 1 is equipped with a support mounting base 34. Multiple fixed mounting ears 35 are provided on the outside of the support mounting base 34 to facilitate the fixed installation of the support mounting base 34 with the external space or structure. The support mounting base 34 is provided with a passage notch 36 that matches the feed quick-connect pipe 3 and the discharge quick-connect pipe 4.

[0042] In this embodiment, the servo motor 6, polarization motor 15, one-way valve 17, and electric lifting rod 28 are all commercially available conventional devices known to those skilled in the art. In this invention, we only use them without modifying their structure or function. Their setting method, installation method, and electrical connection method can be easily explained by those skilled in the art by following the instructions for use. Therefore, we will not elaborate on them here.

[0043] In summary, the working principle of this diesel fraction deep desulfurization and dearomatization system and method is as follows: Before operation, control circuits are first installed for the servo motor 6, the annular heater 1, and the polarization motor 15 in the composite stirring exhaust assembly. Next, a crude oil supply pipeline is installed for the feed quick-connect pipe 3, an external delivery pipeline is installed for the discharge quick-connect pipe 4, a hydrogen inlet pipeline is installed for the gas filling pipe 9, and an oil and gas exhaust pipeline is installed for the side exhaust pipe 12 in the composite stirring exhaust assembly. During actual operation, the control power supply for the servo motor 6, the annular heater 1, and the polarization motor 15 is first turned on. Then, the annular heater 1 operates to heat the open ring 2. The annular heater 1 has an annular structure. Existing heating methods such as combustion heating or resistance heating are used inside the annular heater 1, as long as the heating of the open ring 2 can be achieved. The servo motor 6 is powered on to drive the rotation of the synchronous ring 5 relative to the open ring 2. This drives the rotation of multiple fixed partition plates 7 within the open ring 2, causing multiple independent spaces within the open ring 2 to move relative to each other. When multiple independent spaces sequentially pass through the feed quick-connect pipe 3, the external crude oil supply pipeline connects to the corresponding connected independent spaces via the feed quick-connect pipe 3. When multiple independent spaces sequentially pass through the discharge quick-connect pipe 4, the remaining heavy oil after distillation within the independent spaces is discharged externally via the discharge quick-connect pipe 4 and the external pipeline. As multiple independent spaces rotate sequentially, when the vent 10 on the synchronous ring 5 rotates to connect with the gas filling pipe 9, the hydrogen filling pipeline adds hydrogen to the corresponding independent space via the gas filling pipe 9. After the hydrogen is added, the corresponding independent spaces sequentially pass through the composite stirring and exhaust assembly. When the independent space rotates and moves to the lower side of the composite stirring and exhaust assembly, the crude oil within the independent space is stirred and the oil and gas are extracted and discharged.

[0044] Furthermore, the specific operating principle of the composite stirring and exhaust assembly is as follows: the polarization motor 15 is powered on to drive the rotation of the eccentric block 24. The movement of the eccentric block 24 provides the lifting and lowering driving force for the lifting pipe 13. Each rotation of the eccentric block 24 provides the lifting pipe 13 with a force for both rising and falling, and these forces alternate. Therefore, the lifting pipe 13 repeatedly rises and falls within the fixed mounting pipe 11 against the connecting spring 14. When the lifting pipe 13 lowers, it pushes the spiral stirring plate 18 to lower synchronously. During this process, the spiral stirring plate 18 is inserted relative to the opening ring 2, that is, it extends into the corresponding independent space. During the descent of the spiral stirring plate 18, due to the internal threaded cylinder 19 and the threaded column 20... Due to the threaded transmission, the falling spiral stirring plate 18 rotates synchronously during its descent, thus stirring the crude oil in the independent space to improve the contact effect between crude oil and hydrogen, thereby enhancing the desulfurization and dearomatization effects. As the riser pipe 13 descends, the exhaust space formed between its upper side and the fixed installation pipe 11 increases. Therefore, under the action of the one-way valve 17, the oil and gas in the independent space are drawn into the increased exhaust space. When the riser pipe 13 descends to its lowest position, it will rise in the opposite direction. During the rise of the riser pipe 13, the exhaust space decreases. Therefore, the oil and gas entering the exhaust space will be actively discharged through the side exhaust pipe 12. The discharged oil and gas will be guided and transported through the oil and gas exhaust pipeline. In preparation for the next process, after the crude oil is hydrotreated once, it will pass through another gas filling pipe 9 along with the movement of the independent space to perform a second hydrotreating operation on the crude oil in the independent space. After hydrotreating, a second stirring and oil and gas extraction operation will also be formed. Finally, when the independent space is connected to the discharge quick-connect pipe 4, the remaining heavy oil in the fraction of the independent space will be discharged to facilitate the next round of crude oil being fed back into the independent space, thereby realizing the continuous production of diesel from crude oil fractions. In order to improve the integration effect of hydrogen with crude oil during the addition process, a sliding pipe 37 can be installed in the gas filling pipe 9. The gas filling pipe 9 and the sliding pipe 37 are respectively fixedly connected to the inner liner 39 and the outer cone plate 40. The inner liner 39 and the outer cone plate 40 are interconnected. In this configuration, a stabilizing spring 38 connects the outer cone plate 40 and the gas filling pipe 9. When high-pressure hydrogen is not pumped in, the inner liner column 39 is inserted into the outer cone plate 40 under the action of the stabilizing spring 38, forming a seal between them. When high-pressure hydrogen is pumped in, the outer cone plate 40 will be pushed out relative to the inner liner column 39 under the action of the high-pressure hydrogen. This will cause the sliding pipe 37 to fall and insert below the crude oil surface in the independent space, and will also cause the seal between the outer cone plate 40 and the inner liner column 39 to fail, ultimately forming a passage for compressed hydrogen, allowing compressed hydrogen to be pumped in below the crude oil surface. Although this scheme only describes the gas filling pipe 9 corresponding to the addition of hydrogen, the structure of the gas filling pipe 9 is not limited to the injection of hydrogen.Other gases or catalysts used in conjunction with the equipment can also be added through the gas filling pipe 9.

[0045] While 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 these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A deep desulfurization and dearomatization system for diesel fractions, comprising a main body, characterized in that, It also includes a space forming system. The main body of the equipment includes an annular heating furnace (1), and an open ring (2) is fixedly connected inside the annular heating furnace (1). The bottom end of the open ring (2) is connected to a feed quick-connect pipe (3) and a discharge quick-connect pipe (4). The space forming system includes a mounting synchronization ring (5) and a servo motor (6). An annular opening is provided on the annular heating furnace (1). The mounting synchronization ring (5) is rotatably connected inside the annular opening. The servo motor (6) is mounted on the annular heating furnace (1) and is used to adjust the rotation of the mounting synchronization ring (5) relative to the annular opening. The bottom end of the ring (2) is fixedly connected to multiple fixed partition plates (7). The opening ring (2) is divided into multiple independent spaces by the multiple fixed partition plates (7). The mounting synchronization ring (5) is rotatably connected to a fixed mounting ring (8). The fixed mounting ring (8) is fixedly connected to the annular heating furnace (1). The fixed mounting ring (8) is connected to two gas supply pipes (9). The fixed mounting ring (8) is equipped with two composite stirring and exhaust components. The mounting synchronization ring (5) is provided with two vents (10). The vents (10) are matched with the composite stirring and exhaust components. The vents (10) are also matched with the gas supply pipes (9). Both of the composite stirring and exhaust components include a fixed installation pipe (11). The top of the fixed installation ring (8) has two stepped installation holes. The two fixed installation pipes (11) are fixedly connected in the two stepped installation holes. Both fixed installation pipes (11) are connected to a side exhaust pipe (12). Both fixed installation pipes (11) are slidably connected to a lifting pipe (13). Both lifting pipes (13) are fixedly connected to a dividing plate (16). Both dividing plates (16) are fixedly connected to a connecting spring (14). Both connecting springs (14) are fixedly connected to the two fixed installation pipes (11). Both lifting pipes (13) are equipped with a polarization motor (15). Both dividing plates (16) are equipped with a one-way valve (17). Both lifting pipes (13) are equipped with a cutting stirring component.

2. The diesel fraction deep desulfurization and dearomatization system according to claim 1, characterized in that, Both of the aforementioned cutting-in stirring components include a spiral stirring plate (18), and both spiral stirring plates (18) are fixedly connected to an internal threaded cylinder (19). Both internal threaded cylinders (19) are threadedly connected to a threaded post (20). The two threaded posts (20) are respectively fixedly connected to the two fixed mounting pipes (11). Both spiral stirring plates (18) are fixedly connected to a support ring (21). The two support rings (21) are respectively rotatably connected to the two lifting pipes (13).

3. The diesel fraction deep desulfurization and dearomatization system according to claim 2, characterized in that, The fixed installation tube (11) has a strip opening (22) on its side. The lifting tube (13) is fixedly connected to a suspension frame (23). The suspension frame (23) extends out through the strip opening (22). The polarization motor (15) is mounted on the suspension frame (23). An eccentric block (24) is mounted on the rotation shaft of the polarization motor (15).

4. The diesel fraction deep desulfurization and dearomatization system according to claim 3, characterized in that, The bottom end of the mounting synchronization ring (5) is provided with multiple arc-shaped grooves (25), each of the multiple arc-shaped grooves (25) is connected to an arc-shaped partition (26), each of the multiple arc-shaped partitions (26) is connected inside the open ring (2), each of the multiple arc-shaped partitions (26) is fixedly connected to an arc-shaped spring (27), each of the multiple arc-shaped springs (27) is fixedly connected to a multiple of the fixed partition plates (7), and two electric drive components are installed on the fixed mounting ring (8), the electric drive components are used to drive the arc-shaped partitions (26).

5. A deep desulfurization and dearomatization system for diesel fractions according to claim 4, characterized in that, The electric drive unit includes an electric lifting rod (28), which is installed at the top of the fixed mounting ring (8). A slope block (29) is installed at the bottom of the lifting rod of the electric lifting rod (28), and a pushing slope surface (30) matching the slope block (29) is provided on the arc-shaped partition (26).

6. A deep desulfurization and dearomatization system for diesel fractions according to claim 5, characterized in that, The installation synchronization ring (5) has multiple inlets (31), multiple fixed partition plates (7) are located on one side of the multiple inlets (31), and multiple arc-shaped partitions (26) are located on the other side of the multiple inlets (31). The inlets (31) are used for the passage of the ramp block (29).

7. A diesel fraction deep desulfurization and dearomatization system according to claim 6, characterized in that, A drive spur gear (32) is mounted on the output shaft of the servo motor (6), and the drive spur gear (32) meshes with a transmission end gear ring (33), which is fixedly connected to the top of the mounting synchronization ring (5).

8. A diesel fraction deep desulfurization and dearomatization system according to claim 7, characterized in that, The annular heating furnace (1) is equipped with a support mounting base (34), and the support mounting base (34) is provided with multiple fixed mounting ears (35). The support mounting base (34) is provided with a through notch (36) that matches the feed quick-connect pipe (3) and the discharge quick-connect pipe (4).

9. An operation method for a diesel fraction deep desulfurization and dearomatization system, characterized in that, The diesel fraction deep desulfurization and dearomatization system according to any one of claims 1-8 includes the following steps: S1. Before operation, first install control circuits for servo motor (6), ring furnace (1) and compound stirring exhaust assembly, then install crude oil supply pipeline for feed quick pipe (3), connect external pipeline for discharge quick pipe (4), connect hydrogen gas inlet pipeline for gas filling pipe (9), and install oil and gas exhaust pipeline for compound stirring exhaust assembly. S2. In actual operation, first connect the control power supply of the servo motor (6), the ring heating furnace (1) and the composite stirring and exhaust assembly. Then the ring heating furnace (1) runs to heat the open ring (2). The servo motor (6) is powered on to drive the rotation of the installation synchronization ring (5) relative to the open ring (2). Then, the rotation of multiple fixed partition plates (7) in the open ring (2) is achieved so that multiple independent spaces in the open ring (2) can move relative to each other. S3. When multiple independent spaces pass through the feed quick-connect pipe (3) in sequence, the external crude oil supply pipeline forms the corresponding connected crude oil supply in the independent space through the feed quick-connect pipe (3). When multiple independent spaces pass through the discharge quick-connect pipe (4) in sequence, the heavy oil remaining after distillation in the independent space will be discharged through the discharge quick-connect pipe (4) and the external pipeline to form an auxiliary transportation. S4. With the sequential rotation of multiple independent spaces, when the vent (10) on the synchronous ring (5) rotates to connect with the gas filling pipe (9), the hydrogen filling pipeline adds hydrogen to the corresponding independent space through the gas filling pipe (9). After the hydrogen is added, the corresponding independent space will pass through the composite stirring and exhaust assembly in sequence. When the independent space rotates and moves to the lower side of the composite stirring and exhaust assembly, the crude oil in the independent space will be stirred and the oil and gas will be extracted and discharged. S5. The discharged oil and gas will be guided and transported through the oil and gas discharge pipeline for the next process. After the crude oil is hydrogenated once, it will pass through another gas filling pipe (9) along with the movement of the independent space to carry out a second hydrogenation operation on the crude oil in the independent space. After hydrogenation, a second stirring and oil and gas extraction operation will also be carried out. Finally, when the independent space is connected to the discharge quick pipe (4), the remaining heavy oil in the fraction of the independent space will be discharged to facilitate the next round of crude oil being sent back into the independent space, thereby realizing the continuous production of diesel from crude oil fraction.

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