A centrifugal preparation device and method for nanofuels

Abstract

This invention relates to the field of nanofuel preparation, specifically to a centrifugal preparation apparatus and method for nanofuel. The apparatus includes a mixing tank, a spiral injection pipe disposed inside the mixing tank, and a drive system for rotating the spiral injection pipe. The spiral injection pipe includes a tube body extending spirally along the length of the mixing chamber, with several discharge holes on the tube body. The drive system drives the spiral injection pipe to rotate around its own centerline. Dispersant and nanoparticles delivered into the spiral injection pipe undergo spiral motion. Simultaneously, the dispersant and nanoparticles detach from the spiral injection pipe through the discharge holes and undergo centrifugal motion within the mixing chamber. In embodiments of this invention, the secondary flow effect created by centrifugal force and spiral injection allows for rapid diffusion of nanoparticles and dispersant within the mixing chamber. The nanoparticles undergo random Brownian motion within the liquid fuel, effectively counteracting the gravitational effect of the particles and achieving stable particle dispersion.

Description

Technical Field

[0001] This invention relates to the field of nanofuel preparation, specifically to a centrifugal preparation apparatus and method for nanofuel. Background Technology

[0002] In nanofuels, nanoparticles have high surface activity due to their small size and large specific surface area. Under the action of van der Waals forces, they are prone to aggregation, forming weakly connected large agglomerates, which leads to sedimentation and destroys the dispersion stability of nanofuels. In addition, the fuels used as base liquids are all non-polar liquids, which do not contain ions or molecules with positive or negative charges. Therefore, there is no electrostatic repulsion between the particles added to them, making it easier for particle agglomeration and sedimentation to occur.

[0003] Therefore, the preparation and storage technology of nanofuels has always been a bottleneck technology that needs to be overcome to realize the application of nanofuels. At present, the preparation of nanofuels is mainly divided into two categories: "one-step method" and "two-step method".

[0004] Traditional one-step preparation of nanofuels has high stability and is not prone to sedimentation. However, the one-step preparation of nanofuels is extremely inefficient and costly, and therefore lacks engineering application value.

[0005] Traditional two-step methods for preparing nanofuels make it difficult to achieve proper and complete coating of particles by the dispersant, and the particles will agglomerate during contact with air, making it difficult for the prepared nanofuels to maintain long-term dispersion stability. Summary of the Invention

[0006] The purpose of this invention is to provide a centrifugal preparation device and method for nanofuels, in order to solve the technical problem that the traditional two-step method of nanofuel preparation is difficult to achieve the proper and complete coating of the particles by the dispersant, and the prepared nanofuel is difficult to maintain long-term dispersion stability.

[0007] To solve the above-mentioned technical problems, the present invention specifically provides the following technical solution:

[0008] A centrifugal preparation device for nanofuels includes a mixing tank, a spiral injection pipe, and a drive system;

[0009] The mixing tank has a mixing chamber inside, and the outside of the mixing tank is provided with a liquid fuel inlet, a dispersant inlet, a nanoparticle inlet and a liquid fuel outlet that communicate with the mixing chamber. The liquid fuel inlet is connected to a fuel source.

[0010] The mixing chamber is equipped with two spiral injection pipes. Each spiral injection pipe includes a tube body that extends spirally along the length of the mixing chamber. The tube body is provided with several discharge holes. One end of each spiral injection pipe passes through the dispersant inlet and the nanoparticle inlet, respectively, and is connected to the dispersant source and the nanoparticle source. The end of the spiral injection pipe away from the dispersant inlet and the nanoparticle inlet is closed. The dispersant and nanoparticles delivered by the dispersant source and the nanoparticle source to the spiral injection pipe perform spiral motion.

[0011] The actuator of the drive system is connected to the two spiral injection pipes. The drive system is used to drive the spiral injection pipes to rotate around their own center line, so that the dispersant and nanoparticles are released from the spiral injection pipes through the discharge hole and undergo centrifugal motion inside the mixing chamber.

[0012] Furthermore, the mixing chamber is a cylindrical cavity, with two spiral injection pipes arranged side by side. The centerlines of the two spiral injection pipes are parallel to the axis of the mixing chamber. The spiral directions of the two spiral injection pipes are the same, but their rotation directions are opposite. The ratio of the length of the spiral injection pipe to the length of the mixing chamber is 8:10 to 9:10, the ratio of the pipe diameter of the spiral injection pipe to the inner diameter of the mixing chamber is 1:10 to 1:12, and the ratio of the pipe diameter, spiral radius, and spiral pitch of the spiral injection pipe is 8:15:30.

[0013] Furthermore, the discharge holes are evenly distributed along the centerline of the spiral injection pipe, and the discharge holes are located on the side of the spiral injection pipe away from its own centerline.

[0014] Furthermore, each of the spiral injection pipes is connected to a central pipe at one end. The central pipe is a straight pipe extending along the centerline of the spiral injection pipe. Both the dispersant inlet and the nanoparticle inlet are equipped with bearings. The central pipe is connected to the inner ring of the bearing. The actuator of the drive system is driven by the two central pipes, thereby enabling the spiral injection pipe to rotate around its own centerline.

[0015] Furthermore, it also includes a controller, which is communicatively connected to the drive system to control the start and stop of the drive system.

[0016] Furthermore, the fuel source includes a fuel pump and a fuel tank, the fuel pump being connected to the fuel tank and the liquid fuel inlet; the dispersant source includes a dispersant storage tank and a dispersant delivery pump, the dispersant delivery pump being connected to the dispersant storage tank and one of the spiral injection pipes; the nanoparticle source includes a nanoparticle storage tank and a nanoparticle delivery pump, the nanoparticle delivery pump being connected to the nanoparticle storage tank and another of the spiral injection pipes; the fuel pump, the dispersant delivery pump, and the nanoparticle delivery pump are communicatively connected to the controller.

[0017] Furthermore, the drive system includes a motor and a transmission mechanism. The motor is connected to the two spiral injection pipes through the transmission mechanism, thereby driving the two spiral injection pipes to rotate. The motor is communicatively connected to the controller.

[0018] Furthermore, a pressure sensor is installed inside the mixing chamber to detect the pressure generated by the collision of nanoparticles with the wall of the mixing chamber. A shut-off valve and a check valve are sequentially connected to the liquid fuel outlet. The pressure sensor and the shut-off valve are communicatively connected to the controller. The shut-off valve opens and closes according to the pressure signal detected by the pressure sensor.

[0019] A centrifugal preparation method for nanofuels, wherein the centrifugal preparation method uses a centrifugal preparation apparatus and includes the following steps:

[0020] Step 1: Fill the mixing chamber with liquid fuel;

[0021] Step 2: Dispersant and nanoparticles are respectively delivered into the interior of the two spiral injection pipes. At the same time, the two spiral injection pipes are driven to rotate, so that the dispersant and nanoparticles perform spiral motion inside the spiral injection pipes and centrifugal motion when they leave the spiral injection pipes.

[0022] Step 3: When the pressure generated by the collision of nanoparticles with the wall of the mixing chamber reaches a preset threshold, liquid fuel is discharged.

[0023] Furthermore, the rotational speed of the spiral injection pipe is 400~800 rpm, the pressure of injecting the nanoparticles is ≤3~5MPa, the flow rate is ≤0.015~0.15m / s, and the flow rate is ≤40~400g / min, and the pressure of injecting the dispersant is ≤3~5MPa, the flow rate is ≤0.01~0.2m / s, and the flow rate is ≤30~600g / min.

[0024] Compared with the prior art, this application has the following advantages:

[0025] A centrifugal preparation apparatus and method for nanofuels are provided. The centrifugal effect and the secondary flow effect formed by spiral injection enable the nanoparticles and dispersant to diffuse rapidly in the mixing chamber. This allows the nanoparticles to undergo random Brownian motion in the liquid fuel, effectively counteracting the gravitational effect of the particles and achieving stable dispersion. At the same time, the surface of the nanoparticles adsorbs dispersant molecules with similarly high surface activity due to their extremely high surface activity. The functional groups at the tail end of the dispersant molecules can be miscible with the liquid fuel and reduce the interfacial tension between the solid and liquid, thereby reducing the aggregation between nanoparticles and achieving stable dispersion of particles in the liquid fuel. Attached Figure Description

[0026] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0027] Figure 1 This is a system block diagram of an embodiment of the present invention;

[0028] Figure 2 This is a perspective view of the mixing tank according to an embodiment of the present invention;

[0029] Figure 3 This is a front view of the spiral injection pipe according to an embodiment of the present invention;

[0030] The labels in the diagram represent the following:

[0031] 1-Mixing tank; 11-Liquid fuel inlet; 12-Dispersant inlet; 13-Nanoparticle inlet; 14-Liquid fuel outlet; 15-Bearing; 16-Pressure sensor; 17-Stop valve; 18-Check valve; 2-Spiral injection pipe; 21-Discharge hole; 22-Central pipe; 31-Dispersant storage tank; 32-Dispersant delivery pump; 41-Nanoparticle storage tank; 42-Nanoparticle delivery pump; 51-Motor; 52-Transmission mechanism; 61-Fuel tank; 62-Fuel pump; 7-Controller. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] Nanofuels, as a new type of energy fuel with high calorific value and high heat exchange performance, have extremely high engineering application value. The preparation of nanofuels is currently mainly divided into two categories: "one-step method" and "two-step method".

[0034] Traditional one-step preparation of nanofuels has high stability and is not prone to sedimentation. However, the one-step preparation of nanofuels is extremely inefficient and costly, and therefore lacks engineering application value.

[0035] Traditional two-step methods for preparing nanofuels make it difficult to achieve proper and complete coating of particles by the dispersant, and the particles will agglomerate during contact with air, making it difficult for the prepared nanofuels to maintain long-term dispersion stability.

[0036] To address the aforementioned issues, a centrifugal preparation apparatus and method for nanofuels are provided below. This method combines chemical means of coating nanoparticles with dispersants with physical means of high-speed injection of nanoparticles and dispersants into the liquid fuel. This allows the nanoparticles and dispersants to be rapidly and uniformly dispersed into the liquid fuel, and the effective coating of nanoparticles by the dispersant is quickly achieved. This breaks through the bottleneck of nanofuel preparation and storage, and overcomes the limitations of applying nanofuels in aircraft engines.

[0037] Among them, the liquid fuel can be RP-1 aviation kerosene or JP-10 fuel, the nanoparticles can be aluminum particles with a diameter of 100nm, and the dispersant can be oleic acid. Oleic acid is used to modify the surface of the nanoparticles, reduce the aggregation and sedimentation of the nanoparticles, and there is no need to perform the step of opening the weak connections between the nanoparticles.

[0038] For details, please refer to Figure 1 The centrifugal preparation device for nanofuels includes: a mixing tank 1, a spiral injection pipe 2 disposed inside the mixing tank 1, and a drive system for driving the spiral injection pipe 2 to rotate.

[0039] The mixing tank 1 has a mixing chamber inside. The mixing tank 1 is provided with a liquid fuel inlet 11, a dispersant inlet 12, a nanoparticle inlet 13 and a liquid fuel outlet 14 that are connected to the mixing chamber. Liquid fuel, dispersant and nanoparticles are injected into the mixing chamber through the liquid fuel inlet 11, the dispersant inlet 12 and the nanoparticle inlet 13 respectively. The dispersant and nanoparticles diffuse inside the liquid fuel. At the same time, the dispersant coats the nanoparticles. Finally, the obtained nano fuel is discharged through the liquid fuel outlet 14.

[0040] refer to Figure 2The mixing chamber is equipped with two spiral injection pipes 2. Each spiral injection pipe 2 includes a pipe body that extends spirally along the length of the mixing chamber and several discharge holes 21 that are evenly distributed along its own center line. The two spiral injection pipes 2 pass through the dispersant inlet 12 and the nanoparticle inlet 13 respectively and are connected to the dispersant source and the nanoparticle source. The end of the spiral injection pipe 2 away from the dispersant inlet 12 and the nanoparticle inlet 13 is closed. The dispersant and nanoparticles input into the spiral injection pipe 2 from the dispersant source and the nanoparticle source perform spiral motion.

[0041] Specifically, the diameter of the spiral injection pipe is 8mm, the spiral radius is 15mm, the pitch is 30mm, the rotation speed is 400~800rpm, the length ratio of the spiral pipe to the mixing chamber is 8:10~9:10, and the ratio of the diameter of the spiral pipe to the inner diameter of the mixing chamber is 1:10~1:12.

[0042] The actuator of the drive system is connected to two spiral injection pipes 2 to drive the spiral injection pipes 2 to rotate around their own center line, so that the dispersant and nanoparticles are released from the spiral injection pipes 2 through the discharge hole 21 while performing centrifugal motion.

[0043] Furthermore, the two spiral injection pipes 2 have the same spiral direction, opposite rotation directions, and the same rotation speed.

[0044] Specifically, the liquid fuel inlet 11 is connected to a fuel pump 62 and a fuel tank 61. The fuel pump 62 is connected to the fuel tank 61 and the liquid fuel inlet 11. In this embodiment, the fuel pump 62 is a hydraulic diaphragm metering pump with a rated power of 750W, a rated flow rate of 108L / h, and an adjustable flow rate. The liquid fuel stored inside the fuel tank 61 is transported to the inside of the mixing chamber through the fuel pump 62.

[0045] Preferably, the mixing chamber is a cylindrical cavity, with two spiral injection pipes 2 arranged side by side, the center lines of the two spiral injection pipes 2 being parallel to the axis of the mixing chamber, and the spiral directions of the two spiral injection pipes 2 being the same, and the discharge hole 21 being located on the side of the spiral injection pipe 2 away from its own center line.

[0046] refer to Figure 2 and Figure 3 Each spiral injection pipe 2 is connected to a central pipe 22 at one end. The central pipe 22 is a straight pipe extending along the center line of the spiral injection pipe 2. Both the dispersant inlet 12 and the nanoparticle inlet 13 are equipped with bearings 15. The central pipe 22 is connected to the inner ring of the bearing 15, so that the spiral injection pipe 2 can rotate around its own center line.

[0047] Among them, the bearing 15 is a cylindrical roller bearing 15, the contact part between the outer ring of the bearing 15 and the mixing chamber is sealed with a V-type seal ring, and the side of the bearing 15 facing the inside of the mixing chamber is sealed with an oil seal.

[0048] The dispersant source includes a dispersant storage tank 31 and a dispersant delivery pump 32. The dispersant delivery pump 32 is connected to the dispersant storage tank 31 and a spiral injection pipe 2. In this embodiment, the dispersant delivery pump 32 is a micro gear pump with a rated power of 200W, a rated flow rate of 600ml / min, and an adjustable flow rate. The dispersant inside the dispersant storage tank 31 is delivered to the inside of a spiral injection pipe 2 through the dispersant delivery pump 32.

[0049] The nanoparticle source includes a nanoparticle storage tank 41 and a nanoparticle delivery pump 42. The nanoparticle delivery pump 42 is connected to the nanoparticle storage tank 41 and another spiral injection pipe 2. In this embodiment, the nanoparticle delivery pump 42 is a micro piston vacuum pump that can deliver solid particles, with a rated power of 300W, a rated particle flow rate of 40~400g / min, and the flow rate is adjustable.

[0050] The relevant parameters for pressure, flow rate, and flow rate of the sprayed nanoparticles and dispersant are shown in the table below:

[0051]

[0052] The injection flow rate and velocity of nanoparticles and dispersant are controlled by dispersant delivery pump 32 and nanoparticle delivery pump 42. The two parameters are adjusted according to actual needs: First, ensure that the ratio of particle to total fuel flow rate is 10~50g / L, that is, when the fuel flow rate is 8L / min, the particle flow rate is in the range of 80~40~400g / min, and is adjusted according to the required particle mass fraction. Second, ensure that the volume ratio of particle to dispersant is between 1:2 and 1:4. Taking aluminum particles as an example, when the particle flow rate is the maximum flow rate of 40~400g / min, the dispersant flow rate is in the range of 300~600ml / min.

[0053] The injection pressure is controlled by the dispersant delivery pump 32 and the nanoparticle delivery pump 42 and the back pressure, and is also adjusted according to actual needs: for example, if the fuel outlet back pressure is 3MPa, then the pump pressure is also 3MPa.

[0054] The drive system includes a motor 51 and a transmission mechanism 52. The motor 51 is connected to two central pipes 22 through the transmission mechanism 52, thereby driving the two spiral injection pipes 2 to rotate. In this embodiment, the transmission mechanism 52 adopts a spur gear transmission mechanism 52 with a spur gear module of 2.75. The motor 51 adopts a micro DC motor 51 with a rated power of 450W and a rated speed of 1000rpm.

[0055] A pressure sensor 16 is installed inside the mixing chamber. The pressure sensor 16 is used to detect the pressure generated by the collision of nanoparticles with the wall of the mixing chamber. The liquid fuel outlet 14 is sequentially connected to a shut-off valve 17 and a one-way valve 18.

[0056] In this embodiment, the pressure sensor 16 is a flexible thin film pressure sensor 16. The pressure sensor 16 is used to detect the pressure on the wall of the mixing chamber, and then transmits the electrical signal to the controller 7. The controller 7 determines that the nanoparticles have been dispersed based on the pressure signal (the amplitude of the upward pressure fluctuation exceeds 6%). The controller 7 controls the shut-off valve 17 to open, so as to discharge the nano fuel inside the mixing chamber. The one-way valve 18 is used to prevent the nano fuel from flowing back.

[0057] Specifically, the controller 7 is electrically connected to the pressure sensor 16, the shut-off valve 17, the motor 51, the dispersant delivery pump 32, the nanoparticle delivery pump 42, and the fuel pump 62. The controller 7 generates instantaneous or delayed signals to start and stop each device.

[0058] The workflow of this embodiment is as follows:

[0059] The controller 7 triggers the fuel supply system and controls the flow rate of the fuel pump 62 according to the flow rate requirement of the liquid fuel. After the liquid fuel fills the mixing chamber, the controller triggers the dispersant delivery pump 32, the nanoparticle delivery pump 42 and the motor 51 through a delayed signal. According to the concentration of nanoparticles required by the liquid fuel, the controller controls the flow rate of nanoparticles and dispersant and controls the rotation speed of the motor 51 to perform spiral centrifugal injection. When the pressure signal generated by the collision of nanoparticles with the wall of the mixing chamber detected by the pressure sensor 16 reaches the preset threshold, it proves that the nanoparticles have been effectively dispersed in the mixing chamber. The controller 7 controls the shut-off valve 17 to open, realizing the output of nano fuel.

[0060] The principle of this embodiment is as follows:

[0061] The use of a spiral injection pipe 2 to deliver dispersant and nanoparticles enables simultaneous injection, dispersion, and rapid coating of particles and dispersant. Simultaneously, a motor 51 drives the spiral injection pipe 2 to rotate, generating centrifugal force. Through the centrifugal effect and the secondary flow effect formed by the spiral injection, the nanoparticles and dispersant diffuse rapidly in the mixing chamber. This allows the nanoparticles to undergo random Brownian motion in the liquid fuel, effectively counteracting the gravitational effect of the particles and achieving stable dispersion. At the same time, the highly surface-active nanoparticle surface adsorbs dispersant molecules with similarly high surface activity. The functional groups at the tail end of the dispersant molecules can be miscible with the liquid fuel and reduce the interfacial tension between the solid and liquid, thereby reducing the aggregation of nanoparticles and achieving stable dispersion of particles in the liquid fuel.

[0062] The above embodiments are merely exemplary embodiments of the present invention and are not intended to limit the present invention. The scope of protection of the present invention is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions to the present invention within its spirit and scope of protection, and such modifications or equivalent substitutions should also be considered as falling within the scope of protection of the embodiments of the present invention.

Claims

1. A centrifugal preparation device for nanofuels, characterized in that, It includes a mixing tank (1), a spiral injection pipe (2), and a drive system; The mixing tank (1) has a mixing chamber inside, and the mixing tank (1) is provided with a liquid fuel inlet (11), a dispersant inlet (12), a nanoparticle inlet (13) and a liquid fuel outlet (14) communicating with the mixing chamber. The liquid fuel inlet (11) is connected to a fuel source. The mixing chamber is provided with two spiral injection pipes (2). Each spiral injection pipe (2) includes a pipe body that extends spirally along the length of the mixing chamber. The pipe body is provided with several discharge holes (21). One end of each spiral injection pipe (2) passes through the dispersant inlet (12) and the nanoparticle inlet (13) respectively and is connected to the dispersant source and the nanoparticle source. The end of the spiral injection pipe (2) away from the dispersant inlet (12) and the nanoparticle inlet (13) is closed. The dispersant and nanoparticles delivered by the dispersant source and the nanoparticle source to the spiral injection pipe (2) perform spiral motion. The actuator of the drive system is connected to the two spiral injection pipes (2). The drive system is used to drive the spiral injection pipes (2) to rotate around their own center line, so that the dispersant and nanoparticles are separated from the spiral injection pipes (2) through the discharge hole (21) and perform centrifugal motion inside the mixing chamber.

2. The centrifugal preparation apparatus for nanofuels according to claim 1, characterized in that, The mixing chamber is a cylindrical cavity. Two spiral injection pipes (2) are arranged side by side. The center lines of the two spiral injection pipes (2) are parallel to the axis of the mixing chamber. The spiral directions of the two spiral injection pipes (2) are the same, but their rotation directions are opposite. The ratio of the length of the spiral injection pipe (2) to the length of the mixing chamber is 8:10 to 9:

10. The ratio of the pipe diameter of the spiral injection pipe (2) to the inner diameter of the mixing chamber is 1:10 to 1:

12. The ratio of the pipe diameter, spiral radius and pitch of the spiral injection pipe (2) is 8:15:

30.

3. The centrifugal preparation apparatus for nanofuels according to claim 1, characterized in that, The discharge holes (21) are evenly distributed along the center line of the spiral injection pipe (2), and the discharge holes (21) are located on the side of the spiral injection pipe (2) away from its own center line.

4. The centrifugal preparation apparatus for nanofuels according to claim 1, characterized in that, Each of the spiral injection pipes (2) is connected to a central pipe (22) at one end. The central pipe (22) is a straight pipe extending along the center line of the spiral injection pipe (2). The dispersant inlet (12) and the nanoparticle inlet (13) are both equipped with bearings (15). The central pipe (22) is connected to the inner ring of the bearing (15). The actuator of the drive system is driven by the two central pipes (22), so that the spiral injection pipe (2) can rotate around its own center line.

5. The centrifugal preparation apparatus for nanofuels according to claim 1, characterized in that, It also includes a controller (7), which is communicatively connected to the drive system to control the start and stop of the drive system.

6. The centrifugal preparation apparatus for nanofuels according to claim 5, characterized in that, The fuel source includes a fuel pump (62) and a fuel tank (61), the fuel pump (62) being connected to the fuel tank (61) and the liquid fuel inlet (11). The dispersant source includes a dispersant storage tank (31) and a dispersant delivery pump (32), the dispersant delivery pump (32) being connected to the dispersant storage tank (31) and a spiral injection pipe (2). The nanoparticle source includes a nanoparticle storage tank (41) and a nanoparticle delivery pump (42), the nanoparticle delivery pump (42) being connected to the nanoparticle storage tank (41) and another spiral injection pipe (2). The fuel pump (62), the dispersant delivery pump (32), and the nanoparticle delivery pump (42) are communicatively connected to the controller (7).

7. The centrifugal preparation apparatus for nanofuels according to claim 5, characterized in that, The drive system includes a motor (51) and a transmission mechanism (52). The motor (51) is connected to the two spiral injection pipes (2) through the transmission mechanism (52) to drive the two spiral injection pipes (2) to rotate. The motor (51) is communicatively connected to the controller (7).

8. The centrifugal preparation apparatus for nanofuels according to claim 5, characterized in that, A pressure sensor (16) is installed inside the mixing chamber. The pressure sensor (16) is used to detect the pressure generated by the collision of nanoparticles with the wall of the mixing chamber. The liquid fuel outlet (14) is sequentially connected to a shut-off valve (17) and a check valve (18). The pressure sensor (16) and the shut-off valve (17) are communicatively connected to the controller (7). The shut-off valve (17) opens and closes according to the pressure signal detected by the pressure sensor (16).

9. A centrifugal preparation method for nanofuels, characterized in that, The centrifugal preparation method uses the centrifugal preparation apparatus according to any one of claims 1-8, and the centrifugal preparation method includes the following steps: Step 1: Fill the mixing chamber with liquid fuel; Step 2: Dispersant and nanoparticles are respectively delivered into the interior of the two spiral injection pipes (2). At the same time, the two spiral injection pipes (2) are driven to rotate, so that the dispersant and nanoparticles perform spiral motion inside the spiral injection pipes (2) and perform centrifugal motion when they leave the spiral injection pipes (2). Step 3: When the pressure generated by the collision of nanoparticles with the wall of the mixing chamber reaches a preset threshold, liquid fuel is discharged.

10. The centrifugal preparation method of nanofuel according to claim 9, characterized in that, The rotation speed of the spiral injection pipe (2) is 400-800 rpm, the pressure of the injected nanoparticles is ≤3-5 MPa, the flow rate is ≤0.015-0.15 m / s, and the flow rate is ≤40-400 g / min. The pressure of the injected dispersant is ≤3-5 MPa, the flow rate is ≤0.01-0.2 m / s, and the flow rate is ≤30-600 g / min.

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