A diesel deep desulfurization system and method

Abstract

The present invention relates to the technical field of diesel desulfurization, and specifically to a diesel deep desulfurization system and method, comprising a base and a separation tank, and also comprising a reaction tank, a hydrogenation mechanism, a catalytic mechanism and a stirring mechanism. A support plate is fixedly provided on the top of the base. The catalytic mechanism comprises a receiving tube, an adjustment component, an extrusion component, two conveying pipes and two storage tanks. The stirring mechanism comprises a driving motor, a rotating shaft and a plurality of stirring components. The hydrogenation mechanism comprises a hydrogen tank, a conveying component, a switching component and a transmission component. The driving motor, the adjustment component, the extrusion component and the conveying component are all electrically connected to a controller. The diesel deep desulfurization system and method of the present invention utilizes an adjustment component to switch the type of catalyst entering the receiving tube, thereby meeting the catalytic requirements of diesel with different sulfur contents, improving the catalytic efficiency, and thus being beneficial to improving the desulfurization effect, while increasing the practicality of the system.

Description

Technical Field

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

[0002] As global environmental awareness increases, countries are increasingly restricting the sulfur content in diesel. For example, Europe has implemented a diesel standard of less than 50μg / g sulfur content since 2009, and the more stringent Euro V emission standards in the future require a sulfur content of less than 10μg / g‌1. These restrictions are intended to reduce sulfur oxides produced by diesel combustion, thereby reducing the sulfate content of solid particulate matter in the atmosphere and alleviating environmental problems such as haze and acid rain, because diesel needs to be deeply desulfurized to reduce its internal sulfides and reduce pollution.‌

[0003] The existing diesel deep desulfurization system has the following shortcomings:

[0004] 1. Different types of diesel have different sulfur contents. It is not possible to add catalysts of different activity levels according to the sulfur content of diesel to carry out effective catalytic reactions. The practicality of the desulfurization system needs to be improved.

[0005] 2. Catalysts with different activities require different amounts of hydrogenation, and the amount of hydrogenation cannot be adaptively adjusted according to changes in the activity of the catalyst.

[0006] 3. The multiple mechanisms required in the existing desulfurization system usually operate independently and each needs to be equipped with a driving source, which causes the system to consume more power and thus increases the desulfurization cost. Summary of the invention

[0007] The object of the present invention is to provide a system and method for deep desulfurization of diesel.

[0008] To achieve this object, the present invention adopts the following technical solutions:

[0009] Provided is a diesel deep desulfurization system, comprising a base and a separation tank, wherein the separation tank is arranged on the top of the base;

[0010] It also includes a reaction tank, a hydrogenation mechanism, a catalytic mechanism and a stirring mechanism;

[0011] The reaction tank is arranged on the top of the base;

[0012] A support plate is fixedly provided on the top of the base, a catalytic mechanism is arranged on the top of the support plate, the catalytic mechanism comprises a receiving tube, an adjusting assembly, an extruding assembly, two delivery pipes and two storage tanks, the two storage tanks are fixedly provided on the top of the support plate, a plurality of vertical plates are fixedly provided on the top of the support plate, the receiving tube is fixedly provided on the top of the plurality of vertical plates, each delivery pipe is fixedly provided between the receiving tube and the bottom of one of the storage tanks, a mounting plate is fixedly provided on the top of the support plate, the adjusting assembly is provided between the top of the mounting plate and the two delivery pipes, and the extruding assembly is provided on the outer wall of the mounting plate;

[0013] The stirring mechanism is arranged on the reaction tank, and the stirring mechanism includes a driving motor, a rotating shaft and a plurality of stirring components. A U-shaped plate is fixedly arranged on the top of the reaction tank, the driving motor is inserted on the U-shaped plate, the rotating shaft is rotatably arranged on the reaction tank through a bearing, the output end of the driving motor is fixedly connected to the top end of the rotating shaft, and a plurality of stirring components are arranged on the outer wall of the lower half of the rotating shaft at equal intervals;

[0014] The hydrogenation mechanism is arranged on the top of the support plate, and the hydrogenation mechanism includes a hydrogen tank, a conveying assembly, a switching assembly and a transmission assembly. The hydrogen tank is fixed on the top of the base, and the top of the reaction tank is respectively provided with an air inlet and a liquid inlet, the conveying assembly is arranged between the hydrogen tank and the air inlet, the switching assembly is arranged on the conveying assembly, and the transmission assembly is arranged between the conveying assembly and the adjusting assembly for adjusting the amount of hydrogenation, and the driving motor, the adjusting assembly, the extrusion assembly and the conveying assembly are all electrically connected to the controller.

[0015] Furthermore, the adjustment component includes a first electric push rod, a gear, a rack, a rocker arm, two plug rods, two first plug plates and two first cover shells. The first electric push rod is fixed on the outer wall of the mounting plate, the rack is slidably arranged on the outer wall of the mounting plate through a slide rail, the output end of the first electric push rod is fixedly connected to the rack, the gear is rotatably arranged on the mounting plate through a hinge rod, the rack is meshed with the gear, the rocker arm is fixedly arranged on the top of the hinge rod, each first cover shell is fixedly arranged on the outer wall of a conveying pipe, each first plug plate is plugged into the inside of a first cover shell, each plug rod is fixedly arranged at the bottom of a first plug plate, two slots are symmetrically arranged at both ends of the rocker rod, each plug rod is plugged into a slot, a through hole is arranged on the outer wall of each first plug plate, the diameter of each through hole is consistent with the diameter of the inner hole of a conveying pipe, and the first electric push rod is electrically connected to the controller.

[0016] Furthermore, the extrusion assembly includes a push plate, a second electric push rod and an extrusion rod. An L-shaped block is fixedly provided on the top of the mounting plate. The extrusion rod is inserted into the receiving tube. The second electric push rod is inserted into the L-shaped block. The push plate is fixedly provided on its output end. The other end of the push plate is fixedly connected to an end of the extrusion rod away from the receiving tube. An infusion tube is fixedly provided between the receiving tube and the liquid inlet. The second electric push rod is electrically connected to the controller.

[0017] Furthermore, the conveying assembly includes an exhaust pipe, a blower and an air intake pipe. The blower is fixed on the top of the support plate, the exhaust pipe is fixed between the gas delivery end of the hydrogen tank and the air inlet of the blower, the air intake pipe is fixed between the air outlet and the air inlet of the blower, and the blower is electrically connected to the controller.

[0018] Furthermore, the switching assembly includes a second cover shell, a second plug plate, a first air inlet hole and a second air inlet hole. An L-shaped plate is fixedly provided on the outer wall of the support plate. The second cover shell is fixedly provided on the top of the L-shaped plate, and the air inlet pipe is fixedly connected to the second cover shell. The second plug plate is inserted into the interior of the second cover shell. The first air inlet hole and the second air inlet hole are both provided on the outer wall of the second plug plate, and the diameter of the first air inlet hole is smaller than the diameter of the second air inlet hole.

[0019] Furthermore, the transmission assembly includes a pull rod, a pull rope, a pull block and a return spring. The pull rod is fixed on the top of one of the first plug plates, the pull block is fixed on the top of the second plug plate through a connecting rod, the pull rope is fixed between the pull rod and the pull block, a limit block is fixed on the top of the second cover shell, the return spring is fixed between the pull block and the limit block, and two limit wheels are rotatably provided on the top of the support plate, and the pull rope passes through the two limit wheels.

[0020] Furthermore, each stirring assembly includes a pipe clamp and two stirring plates. The pipe clamp is fixed on the outer wall of the rotating shaft. The two stirring plates are fixed on the outer wall of the pipe clamp. A number of stirring holes are evenly spaced on the outer wall of each stirring plate. Two electric heating plates are symmetrically arranged on the inner bottom of the reaction tank, and each electric heating plate is electrically connected to the controller.

[0021] Furthermore, a discharge pipe is fixedly provided at the bottom of the reaction tank and the separation tank, a solenoid valve is fixedly provided on the outer wall of each discharge pipe, an electric oil pump is fixedly provided on the top of the base, an oil pumping pipe is fixedly provided between the input end of the electric oil pump and the discharge pipe on the reaction tank, an oil inlet pipe is fixedly provided on the top of the separation tank, an oil delivery pipe is fixedly provided between the output end of the electric oil pump and the oil inlet pipe, and the electric oil pump and each solenoid valve are electrically connected to the controller.

[0022] Furthermore, an oil filling pipe is fixedly provided on the top of the reaction tank, a conical receiving cylinder is fixedly provided on the top of the oil filling pipe, a filter plate is provided inside the conical receiving cylinder, and a sealing cover is rotatably provided on the top of the conical receiving cylinder.

[0023] A desulfurization method for a diesel deep desulfurization system comprises the following steps:

[0024] S1: Loading of diesel crude oil:

[0025] When performing deep desulfurization of diesel, first unscrew the sealing cover and pour the crude diesel oil into the conical receiving cylinder. Since the conical receiving cylinder is fixedly connected to the oil filling pipe, the crude diesel oil is poured into the interior of the reaction tank through the oil filling pipe. Then close the sealing cover. The filter plate can filter impurities in the crude oil to improve the purity of the crude oil, which is beneficial to improve the desulfurization effect.

[0026] S2: Hydrogenation, heating and stirring of diesel:

[0027] When the diesel crude oil enters the reaction tank after being filtered, the blower is started by the controller, so that the hydrogen in the hydrogen tank is pumped into the reaction tank through the first air inlet hole through the air extraction pipe and the air intake pipe.

[0028] After the hydrogen in the hydrogen tank is pumped into the interior of the reaction tank through the first air inlet hole through the exhaust pipe and the air inlet pipe, the driving motor is started through the controller. Since the driving motor is fixedly connected to the pipe clamp through the rotating shaft, the two stirring plates are fixedly connected to the pipe clamp, thereby driving the two stirring plates to rotate, so that the hydrogen and the diesel crude oil are mixed. When a number of stirring holes follow the stirring plates to stir, the contact area between the diesel crude oil and the hydrogen can be increased, thereby increasing the mixing speed. After the crude oil and the hydrogen are fully mixed, the two electric heating plates are started through the controller to heat the mixture of the diesel crude oil and the hydrogen.

[0029] S3: Automatic addition of catalyst:

[0030] The two storage tanks are respectively used to store two catalysts with different activities. In the initial state, since the through hole on one of the first plug plates coincides with the inner diameter of the delivery pipe of one of the storage tanks for the catalyst with less activity, the through hole on the other first plug plate does not coincide with the inner diameter of the delivery pipe of the other storage tank for the catalyst with greater activity, so that the other first plug plate blocks the inside of the other delivery pipe, thereby allowing the catalyst with less activity to enter the interior of the receiving tube through the through hole and the delivery pipe, and then the second electric push rod is started by the controller, so that its output end extends toward the end away from the mounting plate. Since its output end is fixedly connected to the extrusion rod through the push plate, the extrusion rod is plugged into the receiving tube, so that the catalyst with less activity entering the receiving tube is squeezed into the interior of the reaction tank through the infusion tube, and the squeezed catalyst accelerates the reaction between hydrogen and sulfur in diesel crude oil.

[0031] S4: Separation of low sulfur diesel and other sulfur compounds:

[0032] When the desulfurization reaction is completed, the solenoid valve on the discharge pipe at the bottom of the reaction tank is opened by the controller, so that the discharge pipe is opened, and then the electric oil pump is started by the controller to transport the diesel mixture in the reaction tank to the interior of the separation tank through the oil suction pipe, the electric oil pump and the oil inlet pipe in turn. After separation, the sulfide and other products in the diesel mixture are separated, and finally the low-sulfur diesel product is discharged through the discharge pipe at the bottom of the separation tank, thereby achieving desulfurization.

[0033] S5: Adaptive adjustment for desulfurization of diesel fuel with different sulfur contents:

[0034] Different types of diesel have different sulfur contents, and therefore require catalysts of different activities to work in conjunction with the reaction. For example, straight-run diesel has a lower sulfur content, so it only needs to be used with a catalyst with a lower activity, while coking diesel has a higher sulfur content, so it needs to be used with a catalyst with a higher activity. The initial state of this system is to desulfurize diesel crude oil with a lower sulfur content. The transported catalyst has a lower activity, and the amount of hydrogenation transported is also smaller. When it is necessary to desulfurize diesel crude oil with a higher sulfur content, the first electric push rod is started by the controller, so that its output end contracts toward the end away from the second electric push rod. Since its output end is fixedly connected to the rack, the rack is slidably connected to the slide rail, the gear is meshed with the rack, and the gear is rotationally connected to the mounting plate through a hinged rod, thereby driving the gear Rotate clockwise. Since the swing rod is fixedly connected to the hinge rod, the swing rod is driven to rotate clockwise. Each plug rod is fixedly connected to a first plug plate, and each plug rod is plugged into a slot at one end of the swing rod. Each first plug plate is plugged into a first cover shell, thereby driving the first plug plate on the left side of the top of the support plate to move toward the end away from the first cover shell until the through hole on the first plug plate coincides with the inner hole of the left delivery pipe, so that the first plug plate on the right side of the top of the support plate moves toward the end close to the first cover shell until the through hole on the first plug plate is staggered with the inner hole of the right delivery pipe, that is, the delivery pipe is blocked. Since the diameter of each through hole is consistent with the diameter of the inner hole of a delivery pipe, the catalyst with greater activity enters the interior of the receiving pipe from the delivery pipe for delivery to the reaction tank.

[0035] When the activity of the catalyst increases, the amount of hydrogen needs to be increased. This is because the increase in the activity of the catalyst means that the reaction rate is accelerated, and more hydrogen is needed to maintain the reaction. For this reason, when the first plug plate on the left side of the top of the support plate moves toward the end away from the first cover shell, since the first plug plate is fixedly connected to one end of the pull rope through the pull rod, the other end of the pull rope is fixedly connected to the second plug plate through the pull block and the connecting rod, and the other ends of the limit block and the pull block are respectively fixedly connected to the two ends of the reset spring, the second plug plate moves inside the second cover shell toward the end away from the L-shaped plate. At this time, the reset spring changes from the initial state to the stretched state.

[0036] When the second plug plate moves inside the second cover shell toward one end away from the L-shaped plate until the second air inlet hole coincides with the inner hole of the air inlet pipe, due to the initial state, the first air inlet hole coincides with the inner hole of the air inlet pipe, and the diameter of the first air inlet hole is smaller than the diameter of the second air inlet hole, thereby increasing the amount of hydrogen sucked into the air inlet pipe by the blower, and thereby increasing the amount of hydrogen entering the reaction tank, that is, while switching to a high-activity catalyst, the amount of hydrogenation is simultaneously increased, so that the two react with diesel to desulfurize, thereby improving the reaction rate and effect.

[0037] Beneficial effects of the present invention:

[0038] 1. The present invention designs a catalytic mechanism, namely a receiving tube, an adjusting component, an extrusion component, two delivery pipes and two storage tanks. The two storage tanks are designed to store catalysts with different activities. The adjusting component can be used to switch the type of catalyst entering the receiving tube, that is, a catalyst with high activity or low activity can be selected to enter the receiving tube, and then enter the reaction tank through the infusion tube on the receiving tube, thereby meeting the catalytic requirements of diesel with different sulfur contents, improving the catalytic efficiency, and then helping to improve the desulfurization effect, while increasing the practicality of the system.

[0039] 2. The present invention designs a transmission component, namely a pull rod, a pull rope, a pull block and a reset spring. While adjusting the activity of the catalyst delivered to the reaction tank, it can simultaneously drive the second plug plate to slide inside the second cover shell, thereby realizing the switching of the first air inlet and the second air inlet to meet the hydrogen content requirements when using catalysts with different activity sizes. That is, when it is adjusted to deliver a high-activity catalyst to the reaction tank, the amount of hydrogen added simultaneously entering the reaction tank is increased, and when it is adjusted to deliver a low-activity catalyst to the reaction tank, the amount of hydrogen added simultaneously entering the reaction tank is reduced, thereby making it possible to achieve an effect of adaptively adjusting the amount of hydrogen added according to the activity of the catalyst, which is beneficial to improving the desulfurization efficiency and increasing the flexibility of the system.

[0040] 3. The present invention can realize the linkage operation of the hydrogenation mechanism and the catalytic mechanism by designing the transmission component. The two can realize the linkage and synchronous operation of the hydrogenation mechanism and the catalytic mechanism through only one driving source, namely the first electric push rod, thereby avoiding the independent operation of the hydrogenation mechanism and the catalytic mechanism, reducing the number of driving sources used in the system, reducing power consumption, and thus helping to reduce the desulfurization cost.

[0041] 4. The present invention designs a stirring mechanism, namely a driving motor, a rotating shaft and a plurality of stirring components. After the hydrogen in the hydrogen tank is pumped into the interior of the reaction tank through the first air inlet hole through the exhaust pipe and the air inlet pipe, the driving motor is started through the controller. Since the driving motor is fixedly connected to the pipe clamp through the rotating shaft, the two stirring plates are fixedly connected to the pipe clamp, thereby driving the two stirring plates to rotate, so that the hydrogen is mixed with the diesel crude oil. When the plurality of stirring holes follow the stirring plate to stir, the contact area between the diesel crude oil and the hydrogen can be increased, thereby increasing the mixing speed of the two, and further improving the desulfurization efficiency of the diesel.

[0042] 5. The present invention designs a filter plate inside the conical receiving cylinder to filter the nitrogen compounds and mechanical impurities in the diesel, thereby avoiding affecting the activity and stability of the subsequent catalyst and causing a decrease in the desulfurization efficiency, thereby achieving a diesel pretreatment effect and facilitating subsequent rapid desulfurization. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the technical solution of the embodiment of the present invention, the drawings in the embodiment of the present invention are briefly introduced below.

[0044] Figure 1 The three-dimensional structure of the present invention is shown in FIG. Figure 1 ;

[0045] Figure 2 The three-dimensional structure of the present invention is shown in FIG. Figure 2 ;

[0046] Figure 3 for Figure 2 A in the enlarged view;

[0047] Figure 4 for Figure 2 The enlarged view of point B in the figure;

[0048] Figure 5 It is a front view of the present invention;

[0049] Figure 6 for Figure 5 The enlarged view of point C in the figure;

[0050] Figure 7 It is a three-dimensional structural schematic diagram of the catalytic mechanism of the present invention;

[0051] Figure 8 for Figure 7 The enlarged view of D in the figure;

[0052] In the figure:

[0053] Base 1, limiting wheel 10, electric oil pump 11, oil pumping pipe 12, oil delivery pipe 13,

[0054] Separation tank 2, discharge pipe 20, solenoid valve 21, oil inlet pipe 22,

[0055] Reaction tank 3, electric heating plate 30, oil injection pipe 31, conical receiving tube 32, filter plate 33, sealing cover 34,

[0056] Hydrogenation mechanism 4,

[0057] Hydrogen tank 40,

[0058] Conveying assembly 41, exhaust pipe 410, blower 411, air inlet pipe 412,

[0059] Switching assembly 42, second housing 420, second plug board 421, first air inlet 422, second air inlet 423,

[0060] Transmission assembly 43, pull rod 430, pull rope 431, pull block 432, return spring 433,

[0061] Catalytic mechanism 5,

[0062] Receiving tube 50, infusion tube 500,

[0063] Adjustment assembly 51, first electric push rod 510, gear 511, rack 512, swing rod 513, plug rod 514, first plug plate 515, first cover 516, through hole 517,

[0064] Extrusion assembly 52, push plate 520, second electric push rod 521, extrusion rod 522,

[0065] Delivery pipe 53,

[0066] Storage tank 54,

[0067] Stirring mechanism 6,

[0068] The driving motor 60,

[0069] Rotation axis 61,

[0070] Stirring assembly 62 , pipe clamp 620 , stirring plate 621 , stirring hole 622 . DETAILED DESCRIPTION

[0071] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0072] Among them, the drawings are only used for illustrative purposes and represent only schematic diagrams rather than actual pictures, and should not be understood as limitations on this patent; in order to better illustrate the embodiments of the present invention, some parts of the drawings will be omitted, enlarged or reduced, and do not represent the size of the actual product.

[0073] Reference Figures 1 to 8As shown, a diesel deep desulfurization system comprises a base 1 and a separation tank 2, wherein the separation tank 2 is arranged on the top of the base 1;

[0074] It also includes a reaction tank 3, a hydrogenation mechanism 4, a catalytic mechanism 5 and a stirring mechanism 6;

[0075] The reaction tank 3 is arranged on the top of the base 1;

[0076] A support plate is fixedly provided on the top of the base 1, and a catalytic mechanism 5 is arranged on the top of the support plate. The catalytic mechanism 5 includes a receiving tube 50, an adjusting assembly 51, an extruding assembly 52, two delivery pipes 53 and two storage tanks 54. The two storage tanks 54 are fixedly provided on the top of the support plate. A plurality of vertical plates are fixedly provided on the top of the support plate. The receiving tube 50 is fixedly provided on the top of the plurality of vertical plates. Each delivery pipe 53 is fixedly provided between the receiving tube 50 and the bottom of one of the storage tanks 54. A mounting plate is fixedly provided on the top of the support plate. The adjusting assembly 51 is provided between the top of the mounting plate and the two delivery pipes 53. The extruding assembly 52 is provided on the outer wall of the mounting plate.

[0077] The stirring mechanism 6 is arranged on the reaction tank 3, and the stirring mechanism 6 includes a driving motor 60, a rotating shaft 61 and a plurality of stirring components 62. A U-shaped plate is fixedly arranged on the top of the reaction tank 3, the driving motor 60 is inserted on the U-shaped plate, the rotating shaft 61 is rotatably arranged on the reaction tank 3 through a bearing, the output end of the driving motor 60 is fixedly connected to the top end of the rotating shaft 61, and a plurality of stirring components 62 are evenly spaced and arranged on the outer wall of the lower half of the rotating shaft 61;

[0078] The hydrogenation mechanism 4 is arranged on the top of the support plate, and the hydrogenation mechanism 4 includes a hydrogen tank 40, a conveying component 41, a switching component 42 and a transmission component 43. The hydrogen tank 40 is fixedly arranged on the top of the base 1, and the top of the reaction tank 3 is respectively provided with an air inlet and a liquid inlet, the conveying component 41 is arranged between the hydrogen tank 40 and the air inlet, the switching component 42 is arranged on the conveying component 41, and the transmission component 43 is arranged between the conveying component 41 and the adjusting component 51 for adjusting the amount of hydrogenation, and the driving motor 60, the adjusting component 51, the extrusion component 52 and the conveying component 41 are all electrically connected to the controller.

[0079] Reference Figure 3 , Figure 4 and Figure 8As shown, the adjustment component 51 includes a first electric push rod 510, a gear 511, a rack 512, a swing rod 513, two plug rods 514, two first plug plates 515 and two first cover shells 516. The first electric push rod 510 is fixedly arranged on the outer wall of the mounting plate, the rack 512 is slidably arranged on the outer wall of the mounting plate through a slide rail, the output end of the first electric push rod 510 is fixedly connected to the rack 512, the gear 511 is rotatably arranged on the mounting plate through a hinge rod, the rack 512 is meshed with the gear 511, the swing rod 513 is fixedly arranged on the top end of the hinge rod, each first cover shell 516 is fixedly arranged on the outer wall of a conveying pipe 53, each first plug plate 515 is inserted into the inside of a first cover shell 516, and each The plug rods 514 are fixedly arranged at the bottom of a first plug plate 515, and two slots are symmetrically arranged at both ends of the swing rod 513. Each plug rod 514 is plugged into a slot. A through hole 517 is arranged on the outer wall of each first plug plate 515. The diameter of each through hole 517 is consistent with the inner hole diameter of a delivery pipe 53. The first electric push rod 510 is electrically connected to the controller. Different types of diesel have different sulfur contents, so catalysts with different activities are required to cooperate with the reaction. For example, the sulfur content of straight-run diesel is low, and it only needs to be used with a catalyst with low activity, while the sulfur content of coking diesel is high, and it needs to be used with a catalyst with high activity. The initial state of this system is to use diesel crude oil with low sulfur content. In the desulfurization operation, the activity of the transported catalyst is relatively low, and the amount of hydrogenation is relatively small. When it is necessary to desulfurize the diesel crude oil with a high sulfur content, the first electric push rod 510 is started by the controller, so that its output end is retracted toward the end away from the second electric push rod 521. Since its output end is fixedly connected to the rack 512, the rack 512 is slidably connected to the slide rail, the gear 511 is meshed with the rack 512, and the gear 511 is rotatably connected to the mounting plate through the hinge rod, thereby driving the gear 511 to rotate clockwise. Since the swing rod 513 is fixedly connected to the hinge rod, the swing rod 513 is driven to rotate clockwise. Each plug rod 514 is fixedly connected to a first plug plate 515, and each plug rod 514 is connected to one end of the swing rod 513. The first plug plate 515 is inserted into the slot, and each first plug plate 515 is inserted into a first cover shell 516, thereby driving the first plug plate 515 on the left side of the top of the support plate to move toward the end away from the first cover shell 516, until the through hole 517 on the first plug plate 515 coincides with the inner hole of the left delivery tube 53, so that the first plug plate 515 on the right side of the top of the support plate moves toward the end close to the first cover shell 516, until the through hole 517 on the first plug plate 515 is staggered with the inner hole of the right delivery tube 53, that is, the delivery tube 53 is blocked. Since the diameter of each through hole 517 is consistent with the inner hole diameter of a delivery tube 53, the catalyst with greater activity enters the interior of the receiving tube from the delivery tube 53 so as to be delivered to the reaction tank 3.

[0080] Reference Figures 1 to 8As shown, the extrusion assembly 52 includes a push plate 520, a second electric push rod 521 and an extrusion rod 522, an L-shaped block is fixedly arranged on the top of the mounting plate, the extrusion rod 522 is inserted into the receiving tube 50, the second electric push rod 521 is inserted into the L-shaped block, the push plate 520 is fixedly arranged on its output end, the other end of the push plate 520 is fixedly connected to the end of the extrusion rod 522 away from the receiving tube 50, a liquid infusion tube 500 is fixedly arranged between the receiving tube 50 and the liquid inlet, the second electric push rod 521 is electrically connected to the controller, and the two storage tanks 54 are respectively used to store two catalysts with different activity sizes. In the initial state, since the through hole 517 on one of the first plug plates 515 coincides with the inner diameter of the delivery pipe 53 of one of the catalyst storage tanks 54 with less activity, the through hole 517 on the other first plug plate 515 coincides with the inner diameter of the delivery pipe 53 of the other catalyst storage tank with greater activity. The inner diameters of the delivery pipes 53 of the storage tanks 54 do not overlap, so that the other first plug plate 515 blocks the inside of the other delivery pipe 53, and then the catalyst with low activity enters the interior of the receiving tube 50 through the through hole 517 and the delivery pipe 53, and then the second electric push rod 521 is started by the controller, so that its output end extends to the end away from the mounting plate. Since its output end is fixedly connected to the extrusion rod 522 through the push plate 520, the extrusion rod 522 is plugged into the receiving tube 50, so that the catalyst with low activity entering the receiving tube 50 is squeezed into the interior of the reaction tank 3 through the infusion tube 500. The squeezed catalyst accelerates the reaction of hydrogen and sulfur in diesel crude oil. It should be noted that a one-way valve is fixedly provided on the outer wall of the infusion tube 500. The catalyst entering the receiving tube 50 can enter the interior of the reaction tank 3 through the infusion tube 500 only if it is squeezed.

[0081] Reference Figures 1 to 8 As shown, the conveying component 41 includes an exhaust pipe 410, a blower 411 and an air inlet pipe 412. The blower 411 is fixed on the top of the support plate, the exhaust pipe 410 is fixed between the gas delivery end of the hydrogen tank 40 and the air inlet of the blower 411, and the air inlet pipe 412 is fixed between the air outlet and the air inlet of the blower 411. The blower 411 is electrically connected to the controller. When the diesel crude oil enters the interior of the reaction tank 3 after being filtered, the blower 411 is started by the controller, so that the hydrogen in the hydrogen tank 40 is extracted to the interior of the reaction tank 3 through the exhaust pipe 410 and the air inlet pipe 412 through the first air inlet hole 422.

[0082] Reference Figures 1 to 8As shown, the switching assembly 42 includes a second housing 420, a second plug-in plate 421, a first air inlet hole 422, and a second air inlet hole 423. An L-shaped plate is fixedly arranged on the outer wall of the support plate. The second housing 420 is fixedly arranged on the top of the L-shaped plate, and the air inlet pipe 412 is fixedly connected to the second housing 420. The second plug-in plate 421 is inserted into the interior of the second housing 420. The first air inlet hole 422 and the second air inlet hole 423 are both arranged on the outer wall of the second plug-in plate 421, and the diameter of the first air inlet hole 422 is smaller than the diameter of the second air inlet hole 423. When the second plug-in plate 421 is in the second housing, the air inlet hole 422 is smaller than the diameter of the second air inlet hole 423. The interior of 420 moves toward one end away from the L-shaped plate to the second air inlet hole 423 and moves to coincide with the inner hole of the air inlet pipe 412. Due to the initial state, the first air inlet hole 422 coincides with the inner hole of the air inlet pipe 412, and the diameter of the first air inlet hole 422 is smaller than the diameter of the second air inlet hole 423, thereby increasing the amount of hydrogen sucked into the air inlet pipe 412 by the blower 411, and thereby increasing the amount of hydrogen entering the reaction tank 3, that is, while switching to a high-activity catalyst, the amount of hydrogenation is simultaneously increased, so that the two react with the diesel to desulfurize, thereby improving the reaction rate and effect.

[0083] Reference Figures 1 to 8 As shown, the transmission assembly 43 includes a pull rod 430, a pull rope 431, a pull block 432 and a return spring 433. The pull rod 430 is fixedly arranged on the top of one of the first plug plates 515, and the pull block 432 is fixedly arranged on the top of the second plug plate 421 through a connecting rod. The pull rope 431 is fixedly arranged between the pull rod 430 and the pull block 432. A limit block is fixedly arranged on the top of the second cover 420, and the return spring 433 is fixedly arranged between the pull block 432 and the limit block. Two limit wheels 10 are rotatably arranged on the top of the support plate, and the pull rope 431 passes through the two limit wheels 10. When the catalyst activity increases, the amount of hydrogen needs to be increased. This is because the increase in catalyst activity means that the reaction rate is accelerated, and it is necessary to More hydrogen is used to maintain the reaction. For this reason, when the first plug plate 515 on the left side of the top of the support plate moves toward the end away from the first cover shell 516, since the first plug plate 515 is fixedly connected to one end of the pull rope 431 through the pull rod 430, the other end of the pull rope 431 is fixedly connected to the second plug plate 421 through the pull block 432 and the connecting rod, and the other ends of the limit block and the pull block 432 are respectively fixedly connected to the two ends of the reset spring 433, so that the second plug plate 421 moves inside the second cover shell 420 away from the end of the L-shaped plate. At this time, the reset spring 433 is changed from the initial state to the stretched state, and the two limit wheels 10 play a limiting role in the pull rope 431.

[0084] Reference Figures 1 to 8As shown, each stirring assembly 62 includes a pipe hoop 620 and two stirring plates 621, the pipe hoop 620 is fixedly arranged on the outer wall of the rotating shaft 61, the two stirring plates 621 are fixedly arranged on the outer wall of the pipe hoop 620, and a plurality of stirring holes 622 are evenly spaced on the outer wall of each stirring plate 621. Two electric heating plates 30 are symmetrically arranged at the bottom of the inner side of the reaction tank 3, and each electric heating plate 30 is electrically connected to the controller. When the hydrogen in the hydrogen tank 40 is pumped to the reaction tank 3 through the first air inlet 422 through the exhaust pipe 410 and the air inlet pipe 412 After the inside of the diesel oil is filled, the driving motor 60 is started through the controller. Since the driving motor 60 is fixedly connected to the pipe clamp 620 through the rotating shaft 61, the two stirring plates 621 are fixedly connected to the pipe clamp 620, thereby driving the two stirring plates 621 to rotate, so that the hydrogen and the diesel crude oil are mixed. When the stirring holes 622 follow the stirring plates 621 to stir, the contact area between the diesel crude oil and the hydrogen can be increased, thereby increasing the mixing speed. After the crude oil and the hydrogen are fully mixed, the two electric heating plates 30 are started through the controller to heat the mixture of the diesel crude oil and the hydrogen.

[0085] Reference Figures 1 to 8 As shown, a discharge pipe 20 is fixedly provided at the bottom of the reaction tank 3 and the separation tank 2, and a solenoid valve 21 is fixedly provided on the outer wall of each discharge pipe 20, an electric oil pump 11 is fixedly provided on the top of the base 1, an oil pumping pipe 12 is fixedly provided between the input end of the electric oil pump 11 and the discharge pipe 20 on the reaction tank 3, an oil inlet pipe 22 is fixedly provided on the top of the separation tank 2, and an oil delivery pipe 13 is fixedly provided between the output end of the electric oil pump 11 and the oil inlet pipe 22, the electric oil pump 11 and each solenoid valve 21 are electrically connected to the controller, when the desulfurization reaction is completed, the solenoid valve 21 on the discharge pipe 20 at the bottom of the reaction tank 3 is opened by the controller, so that the discharge pipe 20 is opened, and then the electric oil pump 11 is started by the controller, and the diesel mixture in the reaction tank 3 is sequentially transported to the inside of the separation tank 2 through the oil pumping pipe 12, the electric oil pump 11 and the oil inlet pipe 22, after separation, the sulfide and other products in the diesel mixture are separated, and finally the low-sulfur diesel product is discharged through the discharge pipe 20 at the bottom of the separation tank 2, thereby achieving desulfurization.

[0086] Reference Figures 1 to 8 As shown, an oil injection pipe 31 is fixedly provided on the top of the reaction tank 3, a conical receiving cylinder 32 is fixedly provided on the top of the oil injection pipe 31, a filter plate 33 is provided inside the conical receiving cylinder 32, and a sealing cover 34 is rotatably provided on the top of the conical receiving cylinder 32. When deep desulfurization of diesel is performed, the sealing cover 34 is first unscrewed, and the diesel crude oil is poured into the conical receiving cylinder 32. Since the conical receiving cylinder 32 is fixedly connected to the oil injection pipe 31, the diesel crude oil is poured into the interior of the reaction tank 3 through the oil injection pipe 31, and then the sealing cover 34 is closed. The filter plate 33 can filter impurities in the crude oil to improve the purity of the crude oil, which is beneficial to improving the desulfurization effect.

[0087] A desulfurization method for a diesel deep desulfurization system comprises the following steps:

[0088] S1: Loading of diesel crude oil:

[0089] When deep desulfurization of diesel is performed, the sealing cover 34 is first unscrewed, and the crude diesel oil is poured into the conical receiving cylinder 32. Since the conical receiving cylinder 32 is fixedly connected to the oil filling pipe 31, the crude diesel oil is poured into the interior of the reaction tank 3 through the oil filling pipe 31. Then the sealing cover 34 is closed, and the filter plate 33 can filter impurities in the crude oil to improve the purity of the crude oil, which is beneficial to improving the desulfurization effect.

[0090] S2: Hydrogenation, heating and stirring of diesel:

[0091] When the diesel crude oil enters the reaction tank 3 after being filtered, the blower 411 is started by the controller, so that the hydrogen in the hydrogen tank 40 is pumped into the reaction tank 3 through the first air inlet 422 via the air extraction pipe 410 and the air intake pipe 412 .

[0092] After the hydrogen in the hydrogen tank 40 is pumped into the interior of the reaction tank 3 through the first air inlet 422 via the exhaust pipe 410 and the air inlet pipe 412, the driving motor 60 is started by the controller. Since the driving motor 60 is fixedly connected to the pipe clamp 620 via the rotating shaft 61, the two stirring plates 621 are fixedly connected to the pipe clamp 620, thereby driving the two stirring plates 621 to rotate, so that the hydrogen is mixed with the diesel crude oil. When the plurality of stirring holes 622 follow the stirring plates 621 to stir, the contact area between the diesel crude oil and the hydrogen can be increased, thereby increasing the mixing speed. After the crude oil and the hydrogen are fully mixed, the two electric heating plates 30 are started by the controller to heat the mixture of the diesel crude oil and the hydrogen.

[0093] S3: Automatic addition of catalyst:

[0094] The two storage tanks 54 are used to store two catalysts with different activities. In the initial state, since the through hole 517 on one of the first plug plates 515 coincides with the inner diameter of the delivery pipe 53 of one of the catalyst storage tanks 54 with less activity, the through hole 517 on the other first plug plate 515 does not coincide with the inner diameter of the delivery pipe 53 of the other catalyst storage tank 54 with greater activity, so that the other first plug plate 515 blocks the inside of the other delivery pipe 53, thereby allowing the catalyst with less activity to enter the interior of the receiving tube 50 through the through hole 517 and the delivery pipe 53, and then the second electric push rod 521 is started by the controller, so that its output end extends to the end away from the mounting plate. Since its output end is fixedly connected to the extrusion rod 522 through the push plate 520, the extrusion rod 522 is plugged into the receiving tube 50, so that the catalyst with less activity entering the receiving tube 50 is squeezed into the interior of the reaction tank 3 through the infusion pipe 500, and the squeezed catalyst accelerates the reaction of hydrogen and sulfur in diesel crude oil.

[0095] S4: Separation of low sulfur diesel and other sulfur compounds:

[0096] When the desulfurization reaction is completed, the solenoid valve 21 on the discharge pipe 20 at the bottom of the reaction tank 3 is opened by the controller, so that the discharge pipe 20 is opened, and then the electric oil pump 11 is started by the controller to transport the diesel mixture in the reaction tank 3 to the interior of the separation tank 2 through the oil suction pipe 12, the electric oil pump 11 and the oil inlet pipe 22 in sequence. After separation, the sulfide and other products in the diesel mixture are separated, and finally the low-sulfur diesel product is discharged through the discharge pipe 20 at the bottom of the separation tank 2, thereby achieving desulfurization.

[0097] S5: Adaptive adjustment for desulfurization of diesel fuel with different sulfur contents:

[0098] Different types of diesel have different sulfur contents, and therefore require catalysts of different activities to work in conjunction with the reaction. For example, straight-run diesel has a lower sulfur content and only needs to be used with a catalyst of lower activity, while coking diesel has a higher sulfur content and needs to be used with a catalyst of higher activity. The initial state of the system is to desulfurize diesel crude oil with a lower sulfur content, and the transported catalyst has a lower activity, and the amount of hydrogenation transported is also smaller. When it is necessary to desulfurize diesel crude oil with a higher sulfur content, the first electric push rod 510 is started by the controller, so that its output end contracts toward the end away from the second electric push rod 521. Since its output end is fixedly connected to the rack 512, the rack 512 is slidably connected to the slide rail, the gear 511 is meshedly connected to the rack 512, and the gear 511 is rotatably connected to the mounting plate through a hinge rod, thereby driving the gear 511 to rotate clockwise. Since the swing rod 513 is fixed to the hinge rod 516, thereby driving the swing rod 513 to rotate clockwise, each plug rod 514 is fixedly connected to a first plug plate 515, each plug rod 514 is plugged into a slot at one end of the swing rod 513, and each first plug plate 515 is plugged into a first cover shell 516, thereby driving the first plug plate 515 on the left side of the top of the support plate to move toward the end away from the first cover shell 516, until the through hole 517 on the first plug plate 515 coincides with the inner hole of the left delivery pipe 53, so that the first plug plate 515 on the right side of the top of the support plate moves toward the end close to the first cover shell 516, until the through hole 517 on the first plug plate 515 is staggered with the inner hole of the right delivery pipe 53, that is, the delivery pipe 53 is blocked. Since the diameter of each through hole 517 is consistent with the diameter of the inner hole of a delivery pipe 53, the catalyst with greater activity enters the interior of the receiving pipe from the delivery pipe 53 so as to be delivered to the reaction tank 3.

[0099] When the activity of the catalyst increases, the amount of hydrogen needs to be increased. This is because the increase in the activity of the catalyst means that the reaction rate is accelerated, and more hydrogen is needed to maintain the reaction. For this reason, when the first plug plate 515 on the left side of the top of the support plate moves toward the end away from the first cover shell 516, since the first plug plate 515 is fixedly connected to one end of the pull rope 431 through the pull rod 430, the other end of the pull rope 431 is fixedly connected to the second plug plate 421 through the pull block 432 and the connecting rod, and the other ends of the limit block and the pull block 432 are respectively fixedly connected to the two ends of the return spring 433, so that the second plug plate 421 moves inside the second cover shell 420 toward the end away from the L-shaped plate. At this time, the return spring 433 changes from the initial state to the stretched state.

[0100] When the second plug plate 421 moves inside the second cover shell 420 toward the end away from the L-shaped plate until the second air inlet hole 423 moves to coincide with the inner hole of the air inlet pipe 412, due to the initial state, the first air inlet hole 422 coincides with the inner hole of the air inlet pipe 412, and the diameter of the first air inlet hole 422 is smaller than the diameter of the second air inlet hole 423, thereby increasing the amount of hydrogen sucked into the air inlet pipe 412 by the blower 411, and thereby increasing the amount of hydrogen entering the reaction tank 3, that is, while switching to a high-activity catalyst, the amount of hydrogenation is simultaneously increased, so that the two react with diesel to desulfurize, thereby improving the reaction rate and effect.

[0101] The working principle of the present invention is as follows: when performing deep desulfurization of diesel, the sealing cover 34 is first unscrewed, and the diesel crude oil is poured into the conical receiving cylinder 32. Since the conical receiving cylinder 32 is fixedly connected to the oil filling pipe 31, the diesel crude oil is poured into the interior of the reaction tank 3 through the oil filling pipe 31. Then, the sealing cover 34 is closed, and the filter plate 33 can filter impurities in the crude oil to improve the purity of the crude oil, which is beneficial to improving the desulfurization effect.

[0102] When the diesel crude oil enters the reaction tank 3 after being filtered, the blower 411 is started by the controller, so that the hydrogen in the hydrogen tank 40 is pumped into the reaction tank 3 through the first air inlet 422 via the air extraction pipe 410 and the air intake pipe 412 .

[0103] After the hydrogen in the hydrogen tank 40 is pumped into the interior of the reaction tank 3 through the first air inlet 422 via the exhaust pipe 410 and the air inlet pipe 412, the driving motor 60 is started by the controller. Since the driving motor 60 is fixedly connected to the pipe clamp 620 via the rotating shaft 61, the two stirring plates 621 are fixedly connected to the pipe clamp 620, thereby driving the two stirring plates 621 to rotate, so that the hydrogen is mixed with the diesel crude oil. When the plurality of stirring holes 622 follow the stirring plates 621 to stir, the contact area between the diesel crude oil and the hydrogen can be increased, thereby increasing the mixing speed. After the crude oil and the hydrogen are fully mixed, the two electric heating plates 30 are started by the controller to heat the mixture of the diesel crude oil and the hydrogen.

[0104] The two storage tanks 54 are used to store two catalysts with different activities. In the initial state, since the through hole 517 on one of the first plug plates 515 coincides with the inner diameter of the delivery pipe 53 of one of the catalyst storage tanks 54 with less activity, the through hole 517 on the other first plug plate 515 does not coincide with the inner diameter of the delivery pipe 53 of the other catalyst storage tank 54 with greater activity, so that the other first plug plate 515 blocks the inside of the other delivery pipe 53, thereby allowing the catalyst with less activity to enter the interior of the receiving tube 50 through the through hole 517 and the delivery pipe 53, and then the second electric push rod 521 is started by the controller, so that its output end extends to the end away from the mounting plate. Since its output end is fixedly connected to the extrusion rod 522 through the push plate 520, the extrusion rod 522 is plugged into the receiving tube 50, so that the catalyst with less activity entering the receiving tube 50 is squeezed into the interior of the reaction tank 3 through the infusion pipe 500, and the squeezed catalyst accelerates the reaction of hydrogen and sulfur in diesel crude oil.

[0105] When the desulfurization reaction is completed, the solenoid valve 21 on the discharge pipe 20 at the bottom of the reaction tank 3 is opened by the controller, so that the discharge pipe 20 is opened, and then the electric oil pump 11 is started by the controller to transport the diesel mixture in the reaction tank 3 to the interior of the separation tank 2 through the oil suction pipe 12, the electric oil pump 11 and the oil inlet pipe 22 in sequence. After separation, the sulfide and other products in the diesel mixture are separated, and finally the low-sulfur diesel product is discharged through the discharge pipe 20 at the bottom of the separation tank 2, thereby achieving desulfurization.

[0106] Different types of diesel have different sulfur contents, and therefore require catalysts of different activities to work in conjunction with the reaction. For example, straight-run diesel has a lower sulfur content and only needs to be used with a catalyst of lower activity, while coking diesel has a higher sulfur content and needs to be used with a catalyst of higher activity. The initial state of the system is to desulfurize diesel crude oil with a lower sulfur content, and the transported catalyst has a lower activity, and the amount of hydrogenation transported is also smaller. When it is necessary to desulfurize diesel crude oil with a higher sulfur content, the first electric push rod 510 is started by the controller, so that its output end contracts toward the end away from the second electric push rod 521. Since its output end is fixedly connected to the rack 512, the rack 512 is slidably connected to the slide rail, the gear 511 is meshedly connected to the rack 512, and the gear 511 is rotatably connected to the mounting plate through a hinge rod, thereby driving the gear 511 to rotate clockwise. Since the swing rod 513 is fixed to the hinge rod 516, thereby driving the swing rod 513 to rotate clockwise, each plug rod 514 is fixedly connected to a first plug plate 515, each plug rod 514 is plugged into a slot at one end of the swing rod 513, and each first plug plate 515 is plugged into a first cover shell 516, thereby driving the first plug plate 515 on the left side of the top of the support plate to move toward the end away from the first cover shell 516, until the through hole 517 on the first plug plate 515 coincides with the inner hole of the left delivery pipe 53, so that the first plug plate 515 on the right side of the top of the support plate moves toward the end close to the first cover shell 516, until the through hole 517 on the first plug plate 515 is staggered with the inner hole of the right delivery pipe 53, that is, the delivery pipe 53 is blocked. Since the diameter of each through hole 517 is consistent with the diameter of the inner hole of a delivery pipe 53, the catalyst with greater activity enters the interior of the receiving pipe from the delivery pipe 53 so as to be delivered to the reaction tank 3.

[0107] When the activity of the catalyst increases, the amount of hydrogen needs to be increased. This is because the increase in the activity of the catalyst means that the reaction rate is accelerated, and more hydrogen is needed to maintain the reaction. For this reason, when the first plug plate 515 on the left side of the top of the support plate moves toward the end away from the first cover shell 516, since the first plug plate 515 is fixedly connected to one end of the pull rope 431 through the pull rod 430, the other end of the pull rope 431 is fixedly connected to the second plug plate 421 through the pull block 432 and the connecting rod, and the other ends of the limit block and the pull block 432 are respectively fixedly connected to the two ends of the return spring 433, so that the second plug plate 421 moves inside the second cover shell 420 toward the end away from the L-shaped plate. At this time, the return spring 433 changes from the initial state to the stretched state.

[0108] When the second plug plate 421 moves inside the second cover shell 420 toward the end away from the L-shaped plate until the second air inlet hole 423 moves to coincide with the inner hole of the air inlet pipe 412, due to the initial state, the first air inlet hole 422 coincides with the inner hole of the air inlet pipe 412, and the diameter of the first air inlet hole 422 is smaller than the diameter of the second air inlet hole 423, thereby increasing the amount of hydrogen sucked into the air inlet pipe 412 by the blower 411, and thereby increasing the amount of hydrogen entering the reaction tank 3, that is, while switching to a high-activity catalyst, the amount of hydrogenation is simultaneously increased, so that the two react with diesel to desulfurize, thereby improving the reaction rate and effect.

Claims

1. A diesel deep desulfurization system, comprising a base (1) and a separation tank (2), wherein the separation tank (2) is arranged on the top of the base (1), and is characterized in that: It also includes a reaction tank (3), a hydrogenation mechanism (4), a catalytic mechanism (5) and a stirring mechanism (6); The reaction tank (3) is arranged on the top of the base (1); A support plate is fixedly provided on the top of the base (1); a catalytic mechanism (5) is arranged on the top of the support plate; the catalytic mechanism (5) comprises a receiving tube (50), an adjusting assembly (51), an extrusion assembly (52), two delivery pipes (53) and two storage tanks (54); the two storage tanks (54) are both fixedly provided on the top of the support plate; a plurality of vertical plates are fixedly provided on the top of the support plate; the receiving tube (50) is fixedly provided on the top of the plurality of vertical plates; each delivery pipe (53) is fixedly provided between the receiving tube (50) and the bottom of one of the storage tanks (54); a mounting plate is fixedly provided on the top of the support plate; the adjusting assembly (51) is provided between the top of the mounting plate and the two delivery pipes (53); and the extrusion assembly (52) is provided on the outer wall of the mounting plate; The adjustment assembly (51) comprises a first electric push rod (510), a gear (511), a rack (512), a swing rod (513), two plug rods (514), two first plug plates (515) and two first cover shells (516); the first electric push rod (510) is fixedly arranged on the outer wall of the mounting plate; the rack (512) is slidably arranged on the outer wall of the mounting plate via a slide rail; the output end of the first electric push rod (510) is fixedly connected to the rack (512); the gear (511) is rotatably arranged on the mounting plate via a hinge rod; the rack (512) is meshedly connected to the gear (511); the swing rod (513) is fixedly arranged on the hinge rod The top of the first cover shell (516) is fixedly mounted on the outer wall of a delivery tube (53), each first plug plate (515) is inserted into the interior of a first cover shell (516), each plug rod (514) is fixedly mounted on the bottom of a first plug plate (515), two slots are symmetrically arranged at both ends of the swing rod (513), each plug rod (514) is plugged into a slot, a through hole (517) is arranged on the outer wall of each first plug plate (515), the diameter of each through hole (517) is consistent with the diameter of the inner hole of a delivery tube (53), and the first electric push rod (510) is electrically connected to the controller; The stirring mechanism (6) is arranged on the reaction tank (3); The hydrogenation mechanism (4) is arranged on the top of the support plate, and comprises a hydrogen tank (40), a conveying assembly (41), a switching assembly (42) and a transmission assembly (43); the hydrogen tank (40) is fixedly arranged on the top of the base (1); an air inlet and a liquid inlet are respectively arranged on the top of the reaction tank (3); the conveying assembly (41) is arranged between the hydrogen tank (40) and the air inlet; the switching assembly (42) is arranged on the conveying assembly (41); and the transmission assembly (43) is arranged between the conveying assembly (41) and the regulating assembly (51) for regulating the amount of hydrogenation; The extrusion assembly (52) comprises a push plate (520), a second electric push rod (521) and an extrusion rod (522); an L-shaped block is fixedly provided on the top of the mounting plate; the extrusion rod (522) is inserted into the receiving tube (50); the second electric push rod (521) is inserted into the L-shaped block; the push plate (520) is fixedly provided on its output end; the other end of the push plate (520) is fixedly connected to an end of the extrusion rod (522) away from the receiving tube (50); a liquid infusion tube (500) is fixedly provided between the receiving tube (50) and the liquid inlet; the second electric push rod (521) is electrically connected to the controller; and the regulating assembly (51), the extrusion assembly (52) and the conveying assembly (41) are all electrically connected to the controller.

2. A diesel deep desulfurization system according to claim 1, characterized in that: The conveying assembly (41) comprises an air extraction pipe (410), a blower (411) and an air intake pipe (412); the blower (411) is fixedly arranged on the top of the support plate; the air extraction pipe (410) is fixedly arranged between the air delivery end of the hydrogen tank (40) and the air intake of the blower (411); the air intake pipe (412) is fixedly arranged between the air outlet and the air intake of the blower (411); and the blower (411) is electrically connected to the controller.

3. A diesel deep desulfurization system according to claim 2, characterized in that: The switching assembly (42) comprises a second housing (420), a second plug plate (421), a first air inlet hole (422) and a second air inlet hole (423); an L-shaped plate is fixedly provided on the outer wall of the support plate; the second housing (420) is fixedly provided on the top of the L-shaped plate; the air inlet pipe (412) is fixedly connected to the second housing (420); the second plug plate (421) is plugged into the interior of the second housing (420); the first air inlet hole (422) and the second air inlet hole (423) are both provided on the outer wall of the second plug plate (421); and the diameter of the first air inlet hole (422) is smaller than the diameter of the second air inlet hole (423).

4. A diesel deep desulfurization system according to claim 3, characterized in that: The transmission assembly (43) comprises a pull rod (430), a pull rope (431), a pull block (432) and a return spring (433); the pull rod (430) is fixedly arranged on the top of one of the first plug plates (515); the pull block (432) is fixedly arranged on the top of the second plug plate (421) via a connecting rod; the pull rope (431) is fixedly arranged between the pull rod (430) and the pull block (432); a limit block is fixedly arranged on the top of the second cover shell (420); the return spring (433) is fixedly arranged between the pull block (432) and the limit block; two limit wheels (10) are rotatably arranged on the top of the support plate; the pull rope (431) passes through the two limit wheels (10).

5. A diesel deep desulfurization system according to claim 4, characterized in that: The stirring mechanism (6) comprises a driving motor (60), a rotating shaft (61) and a plurality of stirring components (62); a U-shaped plate is fixedly provided on the top of the reaction tank (3); the driving motor (60) is inserted into the U-shaped plate; the rotating shaft (61) is rotatably arranged on the reaction tank (3) via a bearing; the output end of the driving motor (60) is fixedly connected to the top end of the rotating shaft (61); and the plurality of stirring components (62) are arranged at equal intervals on the outer wall of the lower half of the rotating shaft (61); Each stirring assembly (62) comprises a pipe clamp (620) and two stirring plates (621); the pipe clamp (620) is fixedly mounted on the outer wall of the rotating shaft (61); the two stirring plates (621) are fixedly mounted on the outer wall of the pipe clamp (620); a plurality of stirring holes (622) are evenly spaced on the outer wall of each stirring plate (621); two electric heating plates (30) are symmetrically mounted on the inner bottom of the reaction tank (3); and the drive motor (60) and each electric heating plate (30) are electrically connected to a controller.

6. A diesel deep desulfurization system according to claim 5, characterized in that: A discharge pipe (20) is fixedly provided at the bottom of the reaction tank (3) and the separation tank (2), and a solenoid valve (21) is fixedly provided on the outer wall of each discharge pipe (20). An electric oil pump (11) is fixedly provided on the top of the base (1), and an oil pumping pipe (12) is fixedly provided between the input end of the electric oil pump (11) and the discharge pipe (20) on the reaction tank (3). An oil inlet pipe (22) is fixedly provided on the top of the separation tank (2), and an oil delivery pipe (13) is fixedly provided between the output end of the electric oil pump (11) and the oil inlet pipe (22). The electric oil pump (11) and each solenoid valve (21) are electrically connected to a controller.

7. A diesel deep desulfurization system according to claim 6, characterized in that: An oil injection pipe (31) is fixedly provided on the top of the reaction tank (3), a conical receiving cylinder (32) is fixedly provided on the top of the oil injection pipe (31), a filter plate (33) is provided inside the conical receiving cylinder (32), and a sealing cover (34) is rotatably provided on the top of the conical receiving cylinder (32).

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