Centrifugal preparation device and preparation method of nano fuel

Abstract

The invention relates to the field of nano fuel preparation, in particular to a centrifugal nano fuel preparation device and method.The centrifugal nano fuel preparation device comprises a mixing tank, a spiral injection pipeline arranged in the mixing tank and a driving system driving the spiral injection pipeline to rotate, and the spiral injection pipeline comprises a pipe body spirally extending in the length direction of a mixing cavity; a plurality of discharging holes are formed in the pipe body, the driving system is used for driving the spiral injection pipeline to rotate around the center line of the spiral injection pipeline, the dispersing agent and the nano-particles conveyed into the spiral injection pipeline perform spiral movement, and the dispersing agent and the nano-particles perform centrifugal movement in the mixing cavity while being separated from the spiral injection pipeline through the discharging holes. According to the embodiment of the invention, the nanoparticles and the dispersing agent are quickly diffused in the mixing cavity through the centrifugal effect and the secondary flow effect formed by spiral injection, and the nanoparticles perform irregular Brownian motion in the liquid fuel, so that the gravity effect of the particles is effectively counteracted, and the dispersion stability of the particles is realized.

Description

Technical Field

[0001] The present invention relates to the field of preparation of nano - fuels, and particularly to a centrifugal preparation device and a preparation method for nano - fuels. Background Art

[0002] In nano - fuels, due to their very small size and large specific surface area, nano - particles have high surface activity. Under the action of van der Waals forces, they are prone to aggregation, forming weakly - connected large aggregates, which leads to sedimentation, destroying the dispersion stability of nano - fuels. In addition, the base liquids of fuels are all non - polar liquids, which do not contain ions or molecules with positive and negative charges. Therefore, there is no restraint of electrostatic repulsion between the particles added thereto, and the phenomenon of particle aggregation and sedimentation is more likely to occur.

[0003] Therefore, the preparation and storage technologies of nano - fuels have always been the bottleneck technologies that need to be broken through for the application of nano - fuels. At present, the preparation of nano - fuels is mainly divided into two categories: "one - step method" and "two - step method".

[0004] The nano - fuels prepared by the traditional one - step method have high stability and are not prone to sedimentation. However, the efficiency of preparing nano - fuels by the one - step method is extremely low, and the preparation cost is very high, without engineering application value.

[0005] The nano - fuels prepared by the traditional two - step method are difficult to achieve exactly complete coating of particles by the dispersant, and the particles will aggregate during the contact with air, and the prepared nano - fuels are difficult to maintain long - term dispersion stability. Summary of the Invention

[0006] The purpose of the present invention is to provide a centrifugal preparation device and a preparation method for nano - fuels to solve the technical problem that the nano - fuels prepared by the traditional two - step method are difficult to achieve exactly complete coating of particles by the dispersant, and the prepared nano - fuels are difficult to maintain long - term dispersion stability.

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

[0008] A centrifugal preparation device for nano - fuels, comprising a mixing tank, a spiral injection pipeline and a driving system;

[0009] A mixing chamber is formed inside the mixing tank, and a liquid fuel inlet, a dispersant inlet, a nano - particle inlet and a liquid fuel outlet communicating with the inside of the mixing chamber are arranged outside the mixing tank. The liquid fuel inlet is connected to a fuel source;

[0010] Two spiral injection pipes are arranged inside the mixing chamber, and the spiral injection pipes include a pipe body extending spirally along the length direction of the mixing chamber, and a plurality of discharge holes are arranged on the pipe body. One end of the two spiral injection pipes passes through the dispersant inlet and the nanoparticle inlet respectively and is connected to the dispersant source and the nanoparticle source. One end of the spiral injection pipe away from the dispersant inlet and the nanoparticle inlet is closed, and the dispersant and nanoparticles transported to the inside of the spiral injection pipe by the dispersant source and the nanoparticle source perform spiral motion.

[0011] The actuator of the driving system is transmission-connected to the two spiral injection pipes, and the driving system is used to drive the spiral injection pipes to rotate around their own center lines, so that the dispersant and nanoparticles leave the spiral injection pipes through the discharge hole and perform centrifugal motion inside the mixing chamber.

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

[0013] Furthermore, the discharge holes are distributed at equal intervals along the center line direction of the spiral injection pipeline, and the discharge holes are arranged on a side of the spiral injection pipeline away from its own center line.

[0014] Furthermore, one end of each of the spiral injection pipes is connected to a central pipe, which is a straight pipe extending along the center line of the spiral injection pipe. The dispersant inlet and the nanoparticle inlet are both equipped with bearings, and the central pipe is connected to the inner ring of the bearing. The actuator of the drive system is transmission-connected to the two central pipes, so that the spiral injection pipe can rotate around its own center line.

[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] Further, the fuel source includes a fuel pump and a fuel tank. The fuel pump is 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 is 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 is connected to the nanoparticle storage tank and the other spiral injection pipe. The fuel pump, the dispersant delivery pump, and the nanoparticle delivery pump are communicatively connected to the controller.

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

[0018] Further, a pressure sensor is disposed inside the mixing chamber. The pressure sensor is used to detect the pressure generated when the nanoparticles collide with the wall of the mixing chamber. The liquid fuel outlet is sequentially connected to a stop valve and a check valve. The pressure sensor and the stop valve are communicatively connected to the controller. The stop valve opens and closes according to the pressure signal detected by the pressure sensor.

[0019] A centrifugal preparation method for nano fuel, the centrifugal preparation method uses the centrifugal preparation device of the claims. The centrifugal preparation method includes the following steps:

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

[0021] Step 2: Respectively convey the dispersant and the nanoparticles into the two spiral injection pipes. At the same time, drive the two spiral injection pipes to rotate, so that the dispersant and the nanoparticles perform spiral motion inside the spiral injection pipes and perform centrifugal motion when leaving the spiral injection pipes;

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

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

[0024] The present application has the following beneficial effects compared with the prior art:

[0025] Provided is a centrifugal preparation device and a preparation method for nano - fuel. Due to the centrifugal effect and the secondary flow effect formed by spiral injection, nano - particles and dispersant rapidly diffuse in the mixing chamber. As a result, the nano - particles perform random Brownian motion in the liquid fuel, effectively counteracting the gravity effect of the particles to achieve the stable dispersion of the particles. At the same time, due to its extremely high surface activity, the surface of the nano - particles adsorbs dispersant molecules with relatively high surface activity. The functional groups at the end of the dispersant molecules can be soluble in the liquid fuel and reduce the interfacial tension between the solid and the liquid, thereby reducing the agglomeration between nano - particles and achieving the stable dispersion of the particles in the liquid fuel. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings described below are only exemplary. For those of ordinary skill in the art, without creative efforts, other implementation drawings can be obtained based on the provided drawings.

[0027] Figure 1 It is the system block diagram of the embodiment of the present invention;

[0028] Figure 2 It is the perspective view of the mixing tank of the embodiment of the present invention;

[0029] Figure 3 It is the front view of the spiral injection pipeline of the embodiment of the present invention;

[0030] The reference numerals in the drawings are respectively represented as follows:

[0031] 1 - mixing tank; 11 - liquid fuel inlet; 12 - dispersant inlet; 13 - nano - particle inlet; 14 - liquid fuel outlet; 15 - bearing; 16 - pressure sensor; 17 - stop valve; 18 - check valve; 2 - spiral injection pipeline; 21 - discharge hole; 22 - central pipeline; 31 - dispersant storage tank; 32 - dispersant delivery pump; 41 - nano - particle storage tank; 42 - nano - particle delivery pump; 51 - motor; 52 - transmission mechanism; 61 - fuel tank; 62 - fuel pump; 7 - controller. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0033] As a new type of energetic fuel with high combustion calorific value and high heat transfer performance, nano-fuel has extremely high engineering application value. Currently, the preparation of nano-fuel is mainly divided into two categories: "one-step method" and "two-step method".

[0034] The nano-fuel prepared by the traditional one-step method has high stability and is not prone to sedimentation. However, the efficiency of preparing nano-fuel by the one-step method is extremely low, and the preparation cost is very high, so it does not have engineering application value.

[0035] It is difficult to achieve exactly complete coating of particles by the dispersant in the nano-fuel prepared by the traditional two-step method, and the particles will agglomerate during the process of contacting with air. The prepared nano-fuel is difficult to maintain long-term dispersion stability.

[0036] To solve the above problems, the following provides a centrifugal preparation device and preparation method for nano-fuel. This preparation method combines the chemical means of coating nano-particles with a dispersant and the physical means of injecting nano-particles and dispersant at high speed inside the liquid fuel, enabling the nano-particles and dispersant to be quickly and evenly dispersed in the liquid fuel, and quickly achieving effective coating of the nano-particles by the dispersant, thereby breaking through the bottleneck of the preparation and storage of nano-fuel and overcoming the limitations of the application of nano-fuel in aircraft engines.

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

[0038] Specifically, referring to Figure 1 , the centrifugal preparation device for nano-fuel includes: a mixing tank 1, a spiral injection pipeline 2 arranged inside the mixing tank 1, and a driving system for driving the spiral injection pipeline 2 to rotate.

[0039] A mixing chamber is formed inside the mixing tank 1. A liquid fuel inlet 11, a dispersant inlet 12, a nano-particle inlet 13, and a liquid fuel outlet 14 communicating with the inside of the mixing chamber are arranged outside the mixing tank 1. The liquid fuel, dispersant, and nano-particles are respectively injected into the inside of the mixing chamber through the liquid fuel inlet 11, the dispersant inlet 12, and the nano-particle inlet 13. The dispersant and nano-particles diffuse inside the liquid fuel, and at the same time, the dispersant coats the nano-particles. Finally, the obtained nano-fuel is discharged through the liquid fuel outlet 14.

[0040] Referring to Figure 2Two spiral injection pipes 2 are arranged inside the mixing chamber. The spiral injection pipes 2 include a pipe body extending spirally along the length direction of the mixing chamber, and a plurality of discharge holes 21 distributed at equal intervals along the center line direction of the mixing chamber. 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. One end of the spiral injection pipe 2 away from the dispersant inlet 12 and the nanoparticle inlet 13 is closed, and the dispersant and nanoparticles input into the spiral injection pipe 2 by the dispersant source and the nanoparticle source perform spiral motion.

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

[0042] The actuator of the driving system is connected to the two spiral injection pipes 2 and is used to drive the spiral injection pipes 2 to rotate around their own center lines, so that the dispersant and nanoparticles are separated from the spiral injection pipes 2 through the discharge holes 21 and perform centrifugal motion at the same time.

[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, and the fuel pump 62 is connected to the fuel tank 61 and the liquid fuel inlet 11. In the present embodiment, the fuel pump 62 adopts a hydraulic diaphragm metering pump, and the fuel pump 62 has a rated power of 750W, a rated flow rate of 108L / h, and an adjustable flow rate. The liquid fuel stored in the fuel tank 61 is transported to the interior of the mixing chamber through the fuel pump 62.

[0045] Preferably, the mixing chamber is a cylindrical cavity, the 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, and the spiral directions of the two spiral injection pipes 2 are the same, and the discharge hole 21 is arranged on the side of the spiral injection pipe 2 away from its own center line.

[0046] refer to Figure 2 and Figure 3 One end of each spiral injection pipe 2 is connected to a central pipe 22, which 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, and 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-shaped sealing 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 and a rated flow rate of 600ml / min, and the flow rate is adjustable. 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 and a rated particle delivery flow rate of 40 - 400g / min, and the flow rate is adjustable.

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

[0051] Pressure Flow velocity Flow rate Injecting nanoparticles 3 - 5 MPa 0.015 - 0.15 m / s 40 - 400 g / min Injecting dispersant 3 - 5 MPa 0.01 - 0.2 m / s 600 ml / min

[0052] The injection flow rate and flow velocity of nanoparticles and dispersant are controlled by the dispersant delivery pump 32 and the nanoparticle delivery pump 42, and the two parameters are adjusted according to actual needs: First, ensure that the ratio of the total flow rate of particles to fuel is 10 - 50g / L. That is, when the maximum flow rate of fuel is 8L / min, the particle flow rate is in the range of 80 - 40 - 400g / min, and it is adjusted according to the required particle mass fraction. Second, ensure that the volume ratio of particles 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, the nanoparticle delivery pump 42, and the back pressure, and is also adjusted according to actual needs: For example, if the back pressure at the fuel outlet 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 is a spur gear transmission mechanism 52 with a module of 2.75 for the spur gear. The motor 51 is a micro DC motor 51 with a rated power of 450W and a rated speed of 1000rpm.

[0055] A pressure sensor 16 is disposed inside the mixing chamber. The pressure sensor 16 is used to detect the pressure generated by the collision of nanoparticles against the wall of the mixing chamber. The liquid fuel outlet 14 is sequentially connected to a stop valve 17 and a check 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 transmit an electrical signal to the controller 7. The controller 7 determines that the nanoparticles are dispersed when the pressure signal (the amplitude of the upward pressure fluctuation exceeds 6%) is detected. The controller 7 controls the opening of the stop valve 17 to discharge the nano fuel inside the mixing chamber. The check valve 18 is used to prevent the reverse flow of the nano fuel.

[0057] Specifically, the controller 7 is electrically connected to the pressure sensor 16, the stop valve 17, the motor 51, the dispersant delivery pump 32, the nanoparticle delivery pump 42, and the fuel pump 62. The controller 7 realizes the start and stop of each device by generating an immediate signal or a delayed signal.

[0058] The working process 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 dispersant delivery pump 32, the nanoparticle delivery pump 42, and the motor 51 are triggered through a delayed signal. According to the concentration of nanoparticles required by the liquid fuel, the flow rates of the nanoparticles and the dispersant are controlled, and the rotation speed of the motor 51 is controlled for spiral centrifugal injection. When the pressure signal generated by the collision of the nanoparticles detected by the pressure sensor 16 against the wall of the mixing chamber reaches a preset threshold value, it proves that effective dispersion of the nanoparticles has been achieved in the mixing chamber. The controller 7 controls the opening of the stop valve 17 to realize the output of the nano fuel.

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

[0061] Using the spiral injection pipeline 2 to deliver the dispersant and nanoparticles can achieve synchronous injection, synchronous dispersion, and rapid coating of the particles and the dispersant. At the same time, the motor 51 is used to drive the spiral injection pipeline 2 to rotate to generate a centrifugal force. Through the centrifugal effect and the secondary flow effect formed by the spiral injection, the nanoparticles and the dispersant rapidly diffuse in the mixing chamber, so that the nanoparticles perform random Brownian motion in the liquid fuel, effectively offsetting the gravity effect of the particles to achieve stable dispersion of the particles. At the same time, due to the extremely high surface activity of the nanoparticle surface, it adsorbs dispersant molecules with high surface activity. The functional groups at the end of the dispersant molecules can be dissolved in the liquid fuel and reduce the interfacial tension between the solid and the liquid, thereby reducing the agglomeration between the nanoparticles and achieving stable dispersion of the particles in the liquid fuel.

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

Claims

1. A centrifugal preparation device for nanofuel, characterized in that: It comprises a mixing tank (1), a spiral injection pipeline (2) and a driving system; A mixing chamber is formed inside the mixing tank (1), and a liquid fuel inlet (11), a dispersant inlet (12), a nanoparticle inlet (13), and a liquid fuel outlet (14) are arranged outside the mixing tank (1), and the liquid fuel inlet (11) is connected to a fuel source. Two spiral injection pipes (2) are arranged inside the mixing chamber, the spiral injection pipes (2) comprising a pipe body extending spirally along the length direction of the mixing chamber, the pipe body being provided with a plurality of discharge holes (21), one end of the two spiral injection pipes (2) respectively passing through the dispersant inlet (12) and the nanoparticle inlet (13) to be connected to a dispersant source and a nanoparticle source, one end of the spiral injection pipe (2) away from the dispersant inlet (12) and the nanoparticle inlet (13) is closed, and the dispersant and nanoparticles transported to the inside of the spiral injection pipe (2) by the dispersant source and the nanoparticle source perform a spiral motion; The actuator of the driving system is connected to the two spiral injection pipes (2) by transmission, and the driving system is used to drive the spiral injection pipes (2) to rotate around their own center lines, so that the dispersant and the nanoparticles are separated from the spiral injection pipes (2) through the discharge hole (21) and perform centrifugal movement inside the mixing chamber.

2. The centrifugal preparation device of nanofuel according to claim 1, characterized in that: The mixing chamber is a cylindrical cavity, the 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 two spiral injection pipes (2) have the same spiral direction and opposite rotation directions, the ratio of the length of the spiral injection pipe (2) to the length of the mixing chamber is 8:10-9:10, the ratio of the diameter of the spiral injection pipe (2) to the inner diameter of the mixing chamber is 1:10-1:12, and the ratio of the diameter, spiral radius and pitch of the spiral injection pipe (2) is 8:15:

30.

3. The centrifugal preparation device of nanofuel according to claim 1, characterized in that: The discharge holes (21) are distributed at equal intervals along the center line direction of the spiral injection pipeline (2), and the discharge holes (21) are arranged on a side of the spiral injection pipeline (2) away from the center line thereof.

4. The centrifugal preparation device of nanofuel according to claim 1, characterized in that: One end of each of the spiral injection pipes (2) is connected to a central pipe (22), and 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), and the central pipe (22) is connected to the inner ring of the bearing (15). The actuator of the drive system is transmission-connected to the two central pipes (22), so that the spiral injection pipe (2) can rotate around its own center line.

5. The centrifugal preparation device of nanofuel 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 device for nanofuel according to claim 5, characterized in that: The fuel source comprises a fuel pump (62) and a fuel tank (61), wherein the fuel pump (62) is connected to the fuel tank (61) and the liquid fuel inlet (11); the dispersant source comprises a dispersant storage tank (31) and a dispersant delivery pump (32), wherein the dispersant delivery pump (32) is connected to the dispersant storage tank (31) and one of the spiral injection pipes (2); the nanoparticle source comprises a nanoparticle storage tank (41) and a nanoparticle delivery pump (42), wherein the nanoparticle delivery pump (42) is connected to the nanoparticle storage tank (41) and another of the spiral injection pipes (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 device for nanofuel according to claim 5, characterized in that: The driving system comprises a motor (51) and a transmission mechanism (52); the motor (51) is connected to the two spiral injection pipes (2) via the transmission mechanism (52), thereby driving the two spiral injection pipes (2) to rotate; and the motor (51) is communicatively connected to the controller (7).

8. The centrifugal preparation device for nanofuel according to claim 5, characterized in that: A pressure sensor (16) is arranged inside the mixing chamber, and the pressure sensor (16) is used to detect the pressure generated by the nanoparticles colliding with the wall of the mixing chamber. The liquid fuel outlet (14) is sequentially connected to a stop valve (17) and a one-way valve (18). The pressure sensor (16) and the stop valve (17) are communicatively connected to the controller (7), and the stop valve (17) is opened and closed according to the pressure signal detected by the pressure sensor (16).

9. A centrifugal preparation method of nano fuel, characterized in that: The centrifugal preparation method uses the centrifugal preparation device described in any one of claims 1 to 8, and the centrifugal preparation method comprises the following steps: Step 1, filling the interior of the mixing chamber with liquid fuel; Step 2: respectively conveying the dispersant and the nanoparticles into the interior of the two spiral injection pipes (2), and at the same time, driving the two spiral injection pipes (2) to rotate, so that the dispersant and the nanoparticles perform a spiral motion inside the spiral injection pipes (2) and perform a centrifugal motion when leaving the spiral injection pipes (2); Step 3: When the pressure generated by the collision of the nanoparticles with the wall of the mixing chamber reaches a preset threshold, the liquid fuel is discharged.

10. The centrifugal preparation method of nano fuel according to claim 9, characterized in that: The rotation speed of the spiral injection pipeline (2) is 400-800 rpm, the pressure of the 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 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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