Deep desulfurization and dearomatization system and method for diesel fraction

Abstract

The invention relates to the technical field of desulfurization and dearomatization systems, and provides a diesel fraction deep desulfurization and dearomatization system and a diesel fraction deep desulfurization and dearomatization method, a plurality of relatively independent spaces are adopted to form diesel fraction and desulfurization and dearomatization operation, and during operation, each part is independent and continuous, so that comprehensive and continuous proceeding of the diesel fraction and desulfurization and dearomatization operation can be better realized, and the operation efficiency is improved. The device is more flexible to use and more practical and comprises a device body and a space forming system, the device body comprises an annular heating furnace, a split ring is fixedly connected into the annular heating furnace, the bottom end of the split ring communicates with a feeding quick connecting pipe and a discharging quick connecting pipe, and the space forming system comprises an installation synchronous ring and a servo motor. An annular opening is formed in the annular heating furnace, the installation synchronous ring is rotationally connected into the annular opening, the servo motor is installed on the annular heating furnace and used for rotationally adjusting the installation synchronous ring relative to the annular opening, and the bottom end of the installation synchronous ring is fixedly connected with a plurality of fixed partition plates.

Description

Technical Field

[0001] The present invention relates to the technical field of desulfurization and dearomatization systems, and in particular to a system and method for deep desulfurization and dearomatization of diesel fractions. Background Art

[0002] As we all know, diesel fraction refers to the components separated from raw materials such as crude oil through processes such as distillation, with a boiling point range suitable for use as diesel. To improve the combustion environmental friendliness of the prepared diesel, we have proposed a system and method for deep desulfurization and dearomatization of diesel fractions. This system can achieve the preparation of diesel fractions while reducing the sulfur and aromatic content in the prepared diesel, thereby reducing the impact of diesel on the environment after use.

[0003] After searching, the Chinese patent application number CN202311853749.6 discloses a hydrogenated diesel fractionation device, which is roughly described as including an equipment body, a mixing mechanism and a scraping mechanism. An oil inlet is connected to one side of the equipment body, and the oil inlet is arranged through the equipment body. An air inlet is connected to the equipment body, and the air inlet is arranged through the equipment body. The mixing mechanism is connected to the equipment body. The mixing mechanism includes stirring blades. A pair of frames are provided in the equipment body, and rotating stirring blades are sleeved in the frames. The scraping mechanism is connected to the equipment body. A pair of toothed discs are connected in the equipment body, and a connecting rod is provided on the toothed disc. A bearing is connected to one end of the connecting rod. The frame is connected to the connecting rod. When in use, through the setting of the corresponding mechanism on the hydrogenated diesel fractionation device, when the hydrogenation reaction is carried out in the hydrogenated diesel fractionation device, the oil inlet is connected to the equipment body. Hydrogen and diesel can be fully mixed evenly through various stirring methods. Chinese patent application number CN01134272.2 discloses a method for deep desulfurization and dearomatization of diesel, which is roughly described as follows: the raw oil is mixed with hydrogen and enters the first reactor, and contacts with a hydro-reforming catalyst, a hydrocracking catalyst or a hydro-refining catalyst. The reaction effluent is stripped in a hydrogen stripper under high temperature and high pressure and then mixed with hydrogen and enters the second reactor, and contacts with a conventional hydro-refining catalyst. The effluent of 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 stripper is mixed with fresh hydrogen and divided into two parts and sent to the first reactor and the second reactor respectively.

[0004] Although both of the above-mentioned two sets of existing technical solutions can realize hydrogenation operations during the diesel fractionation process, it can be clearly judged through analysis of the drawings of the two that both the equipment body in the former and the overall system of the first reactor, the second reactor, the high-pressure separator, the low-pressure separator and the distillation tower in the latter are relatively fixed structures. During actual operation, the materials that need to fractionate the diesel enter multiple processing spaces in sequence, and the multiple processing spaces are connected in series, and the flexibility of use needs to be further improved. Summary of the Invention

[0005] In response to the shortcomings of the existing technology, the present invention provides a system and method for deep desulfurization and dearomatization of diesel fractions. The system uses multiple relatively independent spaces to form diesel fractionation and desulfurization and dearomatization operations. During the operation, each part is independent and continuous, which can better achieve comprehensive and thorough continuous desulfurization and dearomatization of diesel fractionation and desulfurization, making it more flexible and practical.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a diesel fraction deep desulfurization and dearomatization system, comprising an equipment body and a space forming system, wherein the equipment body comprises an annular heating furnace, an open ring is fixedly connected inside the annular heating furnace, and the bottom end of the open ring is connected to a feed quick-connect pipe and a discharge quick-connect pipe, and the space forming system comprises an installation synchronization ring and a servo motor, an annular opening is opened on the annular heating furnace, the installation synchronization ring is rotatably connected in the annular opening, the servo motor is installed on the annular heating furnace, and the servo motor is used for rotation adjustment of the installation synchronization ring relative to the annular opening, a plurality of fixed partition plates are fixedly connected to the bottom end of the installation synchronization ring, a plurality of independent spaces are formed by dividing the open ring by the plurality of fixed partition plates, a fixed installation ring is rotatably connected outside the installation synchronization ring, the fixed installation ring is fixedly connected to the annular heating furnace, two gas adding pipes are connected to the fixed installation ring, two compound stirring and exhaust assemblies are installed on the fixed installation ring, two vents are provided on the installation synchronization ring, the vents match the compound stirring and exhaust assemblies, and the vents also match the gas adding pipes.

[0007] Preferably, the two composite stirring and exhaust assemblies each include a fixed mounting pipe, two stepped mounting holes are provided on the top of the fixed mounting ring, the two fixed mounting pipes are respectively fixedly connected in the two stepped mounting holes, the two fixed mounting pipes are both connected to the side-lead external exhaust pipe, the two fixed mounting pipes are both slidably connected with a lifting pipe, the two lifting pipes are both fixedly connected with a dividing plate, the two dividing plates are both fixedly connected with a connecting spring, the two connecting springs are respectively fixedly connected to the two fixed mounting pipes, the two lifting pipes are both installed with a polarization motor, the two dividing plates are both installed with a one-way valve, and the two lifting pipes are both installed with a cutting-in stirring piece.

[0008] Preferably, the two incision stirring members both include spiral stirring plates, both of the spiral stirring plates are fixedly connected to internal threaded barrels, both of the internal threaded barrels are threadedly connected to threaded columns, the two threaded columns are respectively fixedly connected to the two fixed mounting pipes, and the outside of the two spiral stirring plates are fixedly connected to support rings, and the two support rings are respectively rotatably connected to the two lifting pipes.

[0009] Preferably, a strip-shaped opening is opened on the side of the fixed installation tube, a cantilever is fixedly connected to the outside of the lifting tube, the cantilever extends through the strip-shaped opening, the polarization motor is mounted on the cantilever, and an eccentric block is installed on the rotary shaft of the polarization motor.

[0010] Preferably, a plurality of arc grooves are provided at the bottom end of the mounting synchronization ring, and the plurality of arc grooves are connected to arc spacers, and the plurality of arc spacers are connected in the open ring, and the plurality of arc spacers are fixedly connected to arc springs, and the plurality of arc springs are respectively fixedly connected to the plurality of fixed partition plates, and two electric driving components are installed on the fixed mounting ring, and the electric driving components are used to drive the arc spacers.

[0011] Preferably, the electric drive component includes an electric lifting rod, which is installed on the top of the fixed mounting ring. A slope block is installed at the bottom end of the lifting rod of the electric lifting rod, and a pushing slope surface matching the slope block is provided on the arc-shaped spacer.

[0012] Preferably, a plurality of insertion openings are provided on the mounting synchronization ring, a plurality of the fixed partition plates are respectively located on one side of the plurality of insertion openings, a plurality of the arc-shaped spacer blocks are respectively located on the other side of the plurality of insertion openings, and the insertion openings are used for the passage of the slope blocks.

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

[0014] Preferably, the annular heating furnace is equipped with a supporting mounting seat, a plurality of fixed mounting ears are arranged outside the supporting mounting seat, and a through-notch matching the feeding quick-connect pipe and the discharging quick-connect pipe is provided on the supporting mounting seat.

[0015] A method for operating a diesel fraction deep desulfurization and dearomatization system comprises the following steps: S1. Before operation, first install the control circuit for the servo motor, annular heating furnace and compound stirring exhaust assembly, then install the crude oil supply pipeline for the feed quick-connect pipe, connect the discharge quick-connect pipe to the external delivery pipeline, connect the gas pipe to the hydrogen addition pipeline, and install the oil and gas external discharge pipeline for the compound stirring exhaust assembly; S2. During actual operation, first, the control power supply of the servo motor, the annular heating furnace, and the composite stirring and exhaust assembly is turned on, and then the annular heating furnace is turned on to heat the open ring. The servo motor is powered on to rotate the installed synchronization ring relative to the open ring, and then the multiple fixed partition plates are rotated in the open ring, so that the multiple independent spaces in the open ring are moved relative to each other; 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 to the corresponding connected independent spaces 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 spaces will be discharged through the discharge quick-connect pipe and the external pipeline to form auxiliary transportation. S4. As the multiple independent spaces rotate sequentially, when the vents on the synchronizer ring rotate and connect with the gas filling pipe, hydrogen is added to the corresponding independent spaces through the gas filling pipe. After hydrogen is added, the corresponding independent spaces pass through the composite stirring and exhaust assembly in sequence. When the independent spaces rotate and move to the bottom of the composite stirring and exhaust assembly, the crude oil in the independent spaces is stirred and the oil and gas are extracted and discharged. S5. The discharged oil and gas will be guided and transported through the oil and gas discharge pipeline to prepare for the next process. After the single hydrogenation treatment of the crude oil is completed, it will pass through another gas filling pipe along with the movement of the independent space to perform a secondary hydrogenation operation on the crude oil in the independent space. After hydrogenation, secondary mixing and oil and gas extraction operations will also be performed. Finally, when the independent space is connected with the discharge quick connection pipe, the remaining heavy oil in the distillate in the independent space will be auxiliary discharged to prepare for the next round of crude oil to be re-delivered to the independent space, thereby realizing the continuous preparation of diesel from crude oil distillates.

[0016] Compared with the prior art, the present invention provides a system and method for deep desulfurization and dearomatization of diesel fractions, which has the following beneficial effects: (1) In the present invention, through the design of the equipment body, a basic heating and space creation structure is provided for the diesel fraction, a basic heating treatment space is provided for the distilled crude oil, and a basic installation structure is provided for the subsequent space formation system.

[0017] (2) In the present invention, through the design of the space forming system, the matching open ring forms a space separation structure, which on the one hand realizes the creation of multiple independent spaces, and on the other hand provides continuous operation power for crude oil processing.

[0018] (3) In the present invention, through the design of the composite stirring and exhaust components, 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, and the equipment utilization rate is higher and more practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of a partially cutaway three-dimensional structure of the present invention; Figure 2 For the present invention Figure 1 Schematic diagram of the local enlarged structure at A in the middle; Figure 3 For the present invention Figure 1 Schematic diagram of the local enlarged structure at B in the middle; Figure 4 For the present invention Figure 1 Schematic diagram of the local enlarged structure at C in the middle; Figure 5 For the present invention Figure 1 Schematic diagram of the local enlarged structure at D in the middle; Figure 6 It is a partially cutaway perspective structural diagram of the side-lead external discharge pipe, the lifting pipe, the connecting spring, etc. of the present invention; Figure 7 It is a partially cutaway three-dimensional structural diagram of the side-lead external discharge pipe, the dividing plate and the one-way valve of the present invention; Figure 8 It is a schematic diagram of the three-dimensional structure of the lifting tube and the cantilever frame of the present invention; Figure 9 This is a schematic diagram of the three-dimensional structure of the fixed partition plate, arc-shaped spacer and arc-shaped spring of the present invention; Figure 10 It is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 11 It is a schematic diagram of the overall three-dimensional structure of the present invention when viewed from above; Figure 12 It is a schematic diagram of the exploded three-dimensional structure of the split ring and the installation synchronizer ring of the present invention; Figure 13 It is a partially cutaway three-dimensional structural diagram of the sliding tube, stabilizing spring and liner column of the present invention.

[0020] Figure: 1, annular heating furnace; 2, open ring; 3, feed quick connect pipe; 4, discharge quick connect pipe; 5, installation synchronizing ring; 6, servo motor; 7, fixed partition plate; 8, fixed mounting ring; 9, gas supply pipe; 10, air vent; 11, fixed mounting pipe; 12, side discharge pipe; 13, lifting pipe; 14, connecting spring; 15, polarization motor; 16, partition plate; 17, one-way valve; 18, spiral stirring plate; 19, internal threaded barrel; 20, threaded column ; 21. Support ring; 22. Strip mouth; 23. Cantilever frame; 24. Eccentric block; 25. Arc groove; 26. Arc spacer; 27. Arc spring; 28. Electric lifting rod; 29. ​​Slope block; 30. Push slope; 31. Extension mouth; 32. Driving spur gear; 33. Transmission end gear ring; 34. Support mounting seat; 35. Fixed mounting ear; 36. Through gap; 37. Sliding tube; 38. Stabilizing spring; 39. Lining column; 40. Outer cone plate. DETAILED DESCRIPTION

[0021] 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.

[0022] For examples, see Figures 1-13A diesel fraction deep desulfurization and dearomatization system includes an equipment body and a space forming system. The equipment body includes an annular heating furnace 1, an open ring 2 is fixedly connected to the annular heating furnace 1, and the bottom end of the open ring 2 is connected to a feed quick pipe 3 and a discharge quick pipe 4. Through the design of the equipment body, a basic heating and space creation structure is provided for the diesel fraction, a basic heating treatment space is provided for the distilled crude oil, and a basic installation structure is provided for the subsequent space forming system. The space forming system includes installing a synchronization ring 5 and a servo motor 6. An annular opening is opened on the annular heating furnace 1, and the synchronization ring 5 is installed and rotatably connected in the annular opening. The servo motor 6 is installed on the annular heating furnace 1. A driving spur gear 32 is installed on the output shaft of the servo motor 6, and the driving spur gear 32 is meshed with a transmission end gear ring 33. The transmission end gear ring 33 is fixedly connected to the top of the installation synchronization ring 5. The servo motor 6 is used to install the synchronization ring 5 for rotation adjustment relative to the annular opening. The bottom end of the installation synchronization ring 5 is fixedly connected to a plurality of fixed partition plates 7. The open ring 2 is divided into a plurality of independent spaces by a plurality of fixed partition plates 7. The external rotation of the installation synchronization ring 5 is connected to a fixed mounting ring 8. The fixed mounting ring 8 is fixedly connected to the annular heating furnace 1. There are two gas pipes 9 connected to the fixed mounting ring 8. Two composite stirring exhaust components are installed on the fixed mounting ring 8. Two vents 10 are provided on the installation synchronization ring 5. The vent 10 is matched with the composite stirring exhaust component, and the vent 10 is also matched with the gas filling pipe 9. Through the design of the space forming system, the matching open ring 2 forms a space-separated structure, which realizes the creation of multiple independent spaces on the one hand, and provides continuous operation power for crude oil processing on the other hand. A plurality of arc grooves 25 are opened at the bottom end of the synchronization ring 5, and the plurality of arc grooves 25 are connected with arc spacers 26. The plurality of arc spacers 26 are connected in the open ring 2, and the plurality of arc spacers 26 are fixedly connected with arc springs 27. The plurality of arc springs 27 are respectively fixedly connected to the plurality of fixed partition plates 7. Two electric driving members are installed on the fixed mounting ring 8, and the electric driving member is used for the arc spacers 26 Drive, the electric drive component 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 end of the lifting rod of the electric lifting rod 28. A pushing slope 30 matching the slope block 29 is provided on the arc-shaped spacer 26. When the electric lifting rod 28 operates to cause the slope block 29 to change in relative height, the relative pushing action between the slope block 29 and the pushing slope 30 can cause the arc-shaped spacer 26 to form a relative position adjustment at the bottom end of the synchronization ring 5, thereby changing the spatial volume of multiple independent spaces, thereby pressurizing the crude oil in the independent spaces, promoting the precipitation of gas in the crude oil, and reducing the gas content in the crude oil and the oil and gas content around the crude oil.

[0023] It should be further explained that the two composite stirring exhaust components include a fixed mounting pipe 11, and two stepped mounting holes are provided at the top of the fixed mounting ring 8. The two fixed mounting pipes 11 are fixedly connected to the two stepped mounting holes respectively. The two fixed mounting pipes 11 are both connected to the side-lead external exhaust pipe 12. The two fixed mounting pipes 11 are slidably connected to the lifting pipe 13. The two lifting pipes 13 are fixedly connected to the dividing plate 16. The two dividing plates 16 are fixedly connected to the connecting springs 14. The two connecting springs 14 are fixedly connected to the two fixed mounting pipes 11 respectively. The polarization motor 1 is installed on the two lifting pipes 13. 5. A one-way valve 17 is installed on each of the two dividing plates 16. A cutting-in stirring piece is installed in each of the two lifting pipes 13. The two cutting-in stirring pieces include a spiral stirring plate 18. An internal threaded barrel 19 is fixedly connected to each of the two spiral stirring plates 18. A threaded column 20 is threadedly connected to each of the two internal threaded barrels 19. The two threaded columns 20 are respectively fixedly connected to the two fixed installation pipes 11. A support ring 21 is fixedly connected to the outside of the two spiral stirring plates 18. The two support rings 21 are rotatably connected to the two lifting pipes 13. A strip-shaped opening 22 is opened on the side of the fixed installation pipe 11. A suspension is fixedly connected to the outside of the lifting pipe 13. The extension frame 23 extends through the strip-shaped opening 22, and the polarization motor 15 is installed on the extension frame 23. The eccentric block 24 is installed 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, which can realize the use of a set of equipment with multiple independent spaces, and the equipment utilization rate is higher and more practical. A plurality of extension ports 31 are opened on the installation synchronization ring 5, and a plurality of fixed partition plates 7 are respectively located on one side of the plurality of extension ports 31, and a plurality of arc-shaped spacers 26 are respectively located on the other side of the plurality of extension ports 31. 1 is used for the passage of the sloped block 29. When the sloped block 29 is inserted between the fixed partition plate 7 and the arc-shaped spacer 26 through the extension port 31, it can act on the pushing slope 30, causing the arc-shaped spacer 26 to move relative to the arc-shaped groove 25, thereby changing the space between the fixed partition plate 7 and the arc-shaped spacer 26. The annular heating furnace 1 is equipped with a support mounting base 34. A plurality of 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 to the external space or structure. The support mounting base 34 is provided with a through notch 36 that matches the feed quick pipe 3 and the discharge quick pipe 4.

[0024] The servo motor 6, polarization motor 15, one-way valve 17 and electric lifting rod 28 in this embodiment are all conventional equipment purchased on the market and well known to technicians in this field. In the present invention, we only use them and do not improve their structure and function. For technicians in this field, their setting method, installation method and electrical connection method only need to be debugged according to the requirements of their instruction manual, and will not be described in detail here.

[0025] To sum up, the working principle of the diesel fraction deep desulfurization and dearomatization system and method is as follows: before operation, first, a control circuit is installed for the servo motor 6, the annular heating furnace 1 and the polarization motor 15 in the composite stirring exhaust component; then, a crude oil supply and delivery pipeline is installed for the feed quick-connect pipe 3, an external delivery pipeline is connected for the discharge quick-connect pipe 4, a hydrogen addition pipeline is connected for the gas filling pipe 9, and an oil and gas external discharge pipeline is installed for the side external discharge pipe 12 in the composite stirring exhaust component; during actual operation, first, the control power supply for the servo motor 6, the annular heating furnace 1 and the polarization motor 15 is turned on, and then the annular heating furnace 1 is operated to realize the heating of the open ring 2. The overall structure of the annular heating furnace 1 is an annular structure, and the inside of the annular heating furnace 1 adopts existing heating methods such as combustion heating or resistance heating. As long as the heating of the open ring 2 can be achieved, the servo motor 6 is powered on to realize the rotation drive of the installation of the synchronization ring 5 relative to the open ring 2. , and then the multiple fixed partition plates 7 are driven to rotate in the open ring 2, so that the multiple independent spaces in the open ring 2 form relative position movement. When the multiple independent spaces pass through the feed quick-connect pipe 3 in sequence, the external crude oil supply and transportation pipeline forms the crude oil supply in the corresponding connected independent space through the feed quick-connect pipe 3. When the multiple independent spaces pass through the discharge quick-connect pipe 4 in sequence, the heavy oil remaining after the distillation in the independent space will form an auxiliary transportation and discharge through the discharge quick-connect pipe 4 and the external delivery pipeline. Along with the sequential rotation movement of the multiple independent spaces, when the vent 10 installed on the synchronization ring 5 rotates and moves to form a connection with the gas filling pipe 9, the hydrogen addition pipeline forms hydrogen addition in the corresponding independent space through the gas filling pipe 9. After the hydrogen addition is completed, 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.

[0026] Furthermore, the specific operating principle of the composite stirring exhaust assembly is that the polarization motor 15 is powered on to realize the rotation drive of the eccentric block 24, and the movement of the eccentric block 24 provides the driving force for the lifting and falling of the lifting tube 13, and each rotation of the eccentric block 24 provides a lifting and a falling force for the lifting tube 13, and the lifting and falling forces are formed alternately and reciprocatingly, so the lifting tube 13 will overcome the connecting spring 14 in the fixed installation tube 11 to form repeated rise and fall, and when the lifting tube 13 is lowered, it will push the spiral stirring plate 18 to form a synchronous lowering, and in this process, the spiral stirring plate 18 is inserted relative to the open ring 2, that is, it extends into the corresponding independent space, and during the falling and lowering process of the spiral stirring plate 18, due to the internal threaded barrel 19 and the threaded column 20 Due to the screw transmission effect between the two, the falling spiral stirring plate 18 will form a synchronous rotation during the falling process, thereby stirring the crude oil in the independent space, so as to improve the contact effect between the crude oil and hydrogen, and improve the desulfurization and dearomatization effect. Since the exhaust space formed between the upper side of the lifting pipe 13 and the fixed installation pipe 11 will increase during the lowering process of the lifting pipe 13, the oil and gas in the independent space will be sucked into the exhaust space with the increased space under the action of the one-way valve 17. When the lifting pipe 13 is lowered to the lowest position, it will rise in the reverse direction. The exhaust space will be reduced during the rising process of the lifting pipe 13. Therefore, the oil and gas entering the exhaust space will be actively discharged through the side-lead external exhaust pipe 12, and the discharged oil and gas will be guided and transported through the oil and gas external exhaust pipeline. , in preparation for the next process, and after the single hydrogenation treatment of crude oil is completed, it will pass through another gas filling pipe 9 along with the movement of the independent space, and the crude oil in the independent space will be subjected to a secondary hydrogenation operation. After hydrogenation, secondary stirring and oil and gas extraction operations will also be formed. Finally, when the independent space is connected with the discharge quick pipe 4, the remaining heavy oil in the distillate in the independent space will be auxiliary discharged to prepare for the next round of crude oil to be sent back to the independent space, thereby realizing the continuous preparation of diesel from crude oil distillates. In order to improve the integration effect of hydrogen relative to 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 with an inner lining column 39 and an outer cone plate 40, and the inner lining column 39 and the outer cone plate 40 are mutually connected. The outer cone plate 40 is fitted with a stabilizing spring 38 connected to the gas filling pipe 9. When high-pressure hydrogen is not pumped in, the inner lining column 39 is inserted into the outer cone plate 40 under the action of the stabilizing spring 38 and forms a seal with the outer cone plate 40. When high-pressure hydrogen is pumped in, the outer cone plate 40 is acted upon by the high-pressure hydrogen to form an auxiliary push relative to the inner lining column 39. On the one hand, the sliding tube 37 is caused to fall and be inserted below the crude oil liquid level in the independent space. On the other hand, the sealing effect between the outer cone plate 40 and the inner lining column 39 is invalidated, and finally a passage for compressed hydrogen is formed, so that compressed hydrogen is pumped in relative to below the crude oil liquid level. Although this solution 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 gas can also be added through the gas pipe 9.

[0027] 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 diesel fraction deep desulfurization and dearomatization system, comprising a device body, characterized in that: The device also includes a space forming system, wherein the device body includes an annular heating furnace (1), an open ring (2) is fixedly connected to the annular heating furnace (1), and the bottom end of the open ring (2) is connected to a feed quick pipe (3) and a discharge quick pipe (4), and the space forming system includes an installation synchronization ring (5) and a servo motor (6), an annular opening is opened on the annular heating furnace (1), the installation synchronization ring (5) is rotatably connected in the annular opening, and the servo motor (6) is installed on the annular heating furnace (1), and the servo motor (6) is used for rotating the installation synchronization ring (5) relative to the annular opening. The installation synchronization ring (5) is connected to the annular opening. ) is fixedly connected to the bottom end thereof with a plurality of fixed partition plates (7), the inside of the open ring (2) is divided into a plurality of independent spaces by the plurality of fixed partition plates (7), the mounting synchronization ring (5) is rotatably connected to the outside of the mounting synchronization ring (8), 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 exhaust components are mounted on the fixed mounting ring (8), two vents (10) are provided on the mounting synchronization ring (5), the vents (10) are matched with the composite stirring exhaust component, and the vents (10) are also matched with the gas supply pipes (9).

2. A diesel fraction deep desulfurization and dearomatization system according to claim 1, characterized in that: The two composite stirring exhaust components each include a fixed mounting pipe (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 in the two stepped mounting holes, the two fixed mounting pipes (11) are both connected to a side-lead external exhaust pipe (12), the two fixed mounting pipes (11) are both slidably connected to a lifting pipe (13), the two lifting pipes (13) are both fixedly connected to a dividing plate (16), the two dividing plates (16) are both fixedly connected to a connecting spring (14), the two connecting springs (14) are respectively fixedly connected to the two fixed mounting pipes (11), the two lifting pipes (13) are both installed with a polarization motor (15), the two dividing plates (16) are both installed with a one-way valve (17), and the two lifting pipes (13) are both installed with a cutting-in stirring piece.

3. A diesel fraction deep desulfurization and dearomatization system according to claim 2, characterized in that: The two cutting-in stirring members each include a spiral stirring plate (18), an internal threaded barrel (19) is fixedly connected to the inside of the two spiral stirring plates (18), a threaded column (20) is threadedly connected to the inside of the two internal threaded barrels (19), the two threaded columns (20) are respectively fixedly connected to the two fixed installation pipes (11), and the outside of the two spiral stirring plates (18) is fixedly connected to a support ring (21), and the two support rings (21) are respectively rotatably connected to the two lifting pipes (13).

4. A diesel fraction deep desulfurization and dearomatization system according to claim 3, characterized in that: A strip-shaped opening (22) is provided on the side of the fixed installation tube (11); a cantilever frame (23) is fixedly connected to the outside of the lifting tube (13); the cantilever frame (23) extends through the strip-shaped opening (22); the polarization motor (15) is mounted on the cantilever frame (23); and an eccentric block (24) is mounted on the rotary shaft of the polarization motor (15).

5. A diesel fraction deep desulfurization and dearomatization system according to claim 4, characterized in that: A plurality of arcuate grooves (25) are provided at the bottom end of the mounting synchronization ring (5), and the plurality of arcuate grooves (25) are all connected to arcuate spacers (26), and the plurality of arcuate spacers (26) are all connected to the open ring (2), and the plurality of arcuate spacers (26) are all fixedly connected to arcuate springs (27), and the plurality of arcuate springs (27) are respectively fixedly connected to the plurality of fixed partition plates (7), and two electric drive components are installed on the fixed mounting ring (8), and the electric drive components are used to drive the arcuate spacers (26).

6. A diesel fraction deep desulfurization and dearomatization system according to claim 5, characterized in that: The electric drive component includes an electric lifting rod (28), the electric lifting rod (28) is installed on the top of the fixed mounting ring (8), the bottom end of the lifting rod of the electric lifting rod (28) is installed with a slope block (29), and the arc-shaped spacer (26) is provided with a pushing slope surface (30) matching the slope block (29).

7. A diesel fraction deep desulfurization and dearomatization system according to claim 6, characterized in that: The mounting synchronizer ring (5) is provided with a plurality of insertion openings (31), the plurality of fixed partition plates (7) are respectively located on one side of the plurality of insertion openings (31), the plurality of arc-shaped spacers (26) are respectively located on the other side of the plurality of insertion openings (31), and the insertion openings (31) are used for the sloped blocks (29) to pass through.

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

9. A diesel fraction deep desulfurization and dearomatization system according to claim 8, characterized in that: The annular heating furnace (1) is equipped with a supporting mounting seat (34), a plurality of fixed mounting ears (35) are arranged outside the supporting mounting seat (34), and a through notch (36) matching the feeding quick-connect pipe (3) and the discharging quick-connect pipe (4) is arranged on the supporting mounting seat (34).

10. A method for operating a diesel fraction deep desulfurization and dearomatization system, characterized in that: A diesel fraction deep desulfurization and dearomatization system according to any one of claims 1 to 9 is used, comprising the following steps: S1. Before operation, first, a control circuit is installed for the servo motor (6), the annular heating furnace (1) and the composite stirring exhaust assembly, then a crude oil supply pipeline is installed for the feed quick connection pipe (3), an external delivery pipeline is connected to the discharge quick connection pipe (4), a hydrogen addition pipeline is connected to the gas filling pipe (9), and an oil and gas external discharge pipeline is installed for the composite stirring exhaust assembly; S2, during actual operation, firstly, the control power supply of the servo motor (6), the annular heating furnace (1) and the composite stirring exhaust assembly is turned on, and then the annular heating furnace (1) is turned on to realize heating of the open ring (2), and the servo motor (6) is powered on to realize rotational drive of the installed synchronization ring (5) relative to the open ring (2), and then realize rotational drive of the plurality of fixed partition plates (7) in the open ring (2), so that the plurality of independent spaces in the open ring (2) form relative position movement; S3. When multiple independent spaces pass through the feed quick-connect pipe (3) 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 (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 form auxiliary transportation and discharge through the discharge quick-connect pipe (4) and the external delivery pipeline; S4, accompanied by the sequential rotation of the plurality of independent spaces, when the vent (10) installed on the synchronization ring (5) rotates and moves to form a connection with the gas filling pipe (9), the hydrogen adding pipeline is connected to the corresponding independent space through the gas filling pipe (9). After the hydrogen addition is completed, the corresponding independent spaces will 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 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 to prepare for the next process. After the single hydrogenation treatment of the crude oil is completed, it will pass through another gas filling pipe (9) along with the movement of the independent space to perform a secondary hydrogenation operation on the crude oil in the independent space. After hydrogenation, secondary mixing and oil and gas extraction operations will also be performed. Finally, when the independent space is connected to the discharge quick connection pipe (4), the remaining heavy oil in the distillate in the independent space will be auxiliary discharged to prepare for the next round of crude oil to be sent back to the independent space, thereby realizing the continuous preparation of diesel from crude oil distillates.

Images