Aviation kerosene sterilization centrifugal pump based on hydrodynamic cavitation and sterilization system

Abstract

The invention relates to the technical field of aviation kerosene sterilization, and discloses an aviation kerosene sterilization centrifugal pump based on hydrodynamic cavitation and a sterilization system.The aviation kerosene sterilization centrifugal pump is characterized in that a liquid inlet is formed in the middle of the rear side wall of a transparent volute, and a liquid outlet is formed in the position, close to the side edge, of the rear side wall of the transparent volute; the cover plate is rotationally connected into the transparent volute, the blades are arranged on the side face, close to the liquid inlet, of the cover plate, and the blades are evenly distributed on the cover plate; the driving part is used for driving the impeller to rotate; a first pipeline communicated with a liquid inlet of the transparent volute is arranged at the bottom of the side wall of the storage tank, and a second pipeline communicated with a liquid outlet of the transparent volute is arranged at the top of the storage tank; the vacuum pump is arranged on the first pipeline; the two pressure sensors are respectively arranged at a liquid inlet and a liquid outlet of the transparent volute; the two flow meters are respectively arranged on the first pipeline and the second pipeline; the sterilization centrifugal pump and the sterilization system solve the problems that in the prior art, the sterilization effect is not thorough, the residual risk is high, the energy consumption is high, and the influence on the fuel quality is large.

Description

Technical Field

[0001] The present invention relates to the technical field of aviation kerosene sterilization, and particularly relates to a centrifugal pump for aviation kerosene sterilization and a sterilization system based on hydrodynamic cavitation. Background Art

[0002] Aviation kerosene is the main fuel used by aircraft, and its quality directly affects the operation safety and life of aircraft. During the storage and transportation of aviation kerosene, microbial contamination often occurs. In particular, microorganisms such as bacteria and fungi may grow and reproduce in kerosene. Microbial metabolites may cause a decline in the quality of kerosene, thereby affecting engine performance. The acidic substances generated by microorganisms will also corrode storage tanks and oil pipelines, increasing maintenance costs. Microbial residues in fuels may block the oil circuit system or cause filter failure, threatening aviation safety. In order to ensure the purity and stability of aviation kerosene, it must be sterilized before storage and use. However, the current treatment technologies still face significant challenges.

[0003] At present, the sterilization treatment technologies for aviation kerosene mainly include: filtration sterilization and chemical agent sterilization. However, filtration sterilization cannot completely kill the microorganisms in kerosene. And the filter element is easy to be blocked and needs to be replaced frequently, increasing the operation and maintenance costs. Moreover, the treatment efficiency of the filtration method is low and cannot meet the requirements of high-flow and large-scale industrial treatment. Chemical agent sterilization may change the chemical properties of aviation kerosene, resulting in a decrease in the combustion efficiency of aviation fuel or affecting its stability. And there may be residual components in kerosene after using chemical agents, leading to potential safety hazards or incomplete combustion during subsequent use. Therefore, it is necessary to provide a sterilization device and a sterilization system that can sterilize thoroughly and will not affect the quality of aviation kerosene. Summary of the Invention

[0004] The present invention provides a centrifugal pump for aviation kerosene sterilization and a sterilization system based on hydrodynamic cavitation to solve the above deficiencies in the prior art. The centrifugal pump for aviation kerosene sterilization and the sterilization system solve the problems of incomplete sterilization effect and great influence on fuel quality existing in the prior art.

[0005] The technical solution of the present invention is: A centrifugal pump device for aviation kerosene sterilization based on hydrodynamic cavitation, comprising:

[0006] The rear side wall of the transparent volute is provided with a liquid inlet and a liquid outlet, and the liquid inlet is located at the middle position of the rear side wall of the transparent volute;

[0007] The impeller includes: a cover plate and a plurality of blades. The cover plate is rotatably connected in the transparent volute. The center of the cover plate is directly opposite to the liquid inlet. A plurality of the blades are all arranged on the side of the cover plate close to the liquid inlet. A plurality of the blades are all arc-shaped, and a plurality of the blades are evenly distributed on the cover plate;

[0008] The driving member is arranged at the rear side of the transparent volute. The rotating shaft of the driving member is connected to the rear side wall of the cover plate. The driving member is used to drive the impeller to rotate.

[0009] In at least one embodiment of the present invention, the number of blades on the cover plate is 4. The included angle of each blade is 138° - 139°. The inlet installation angle of each blade is 18° - 20°. The outlet installation angle of each blade is 40° - 42°.

[0010] In at least one embodiment of the present invention, an installation pipe is provided at the liquid inlet of the rear side wall of the transparent volute. The installation pipe is used to be connected to the liquid inlet pipeline. A transmission shaft connected to the cover plate is arranged in the installation pipe. A sealing mechanism is arranged at one end of the installation pipe far away from the transparent volute. The transmission shaft passes through the sealing mechanism and is connected to the rotating shaft of the driving member.

[0011] In at least one embodiment of the present invention, the sealing mechanism includes:

[0012] A sealing shell is arranged at one end of the installation pipe far away from the transparent volute. An installation groove is provided in the sealing shell.

[0013] The mechanical seal includes a connecting disc and a sleeve. The sleeve vertically penetrates through the connecting disc. The connecting disc is arranged in the installation groove. The sleeve extends into the installation pipe. The transmission shaft passes through the sleeve and penetrates out of the sealing shell.

[0014] In at least one embodiment of the present invention, an elastic coupling is arranged at the end of the transmission shaft. The rotating shaft of the driving member is connected to the elastic coupling.

[0015] The present invention also proposes a sterilization system for aviation kerosene based on hydrodynamic cavitation, including:

[0016] A storage tank, at the bottom of the side wall of which there is a first pipeline communicating with the installation pipe, and at the top of the side wall of which there is a second pipeline communicating with the liquid outlet of the transparent volute;

[0017] A vacuum pump is connected to the storage tank. The vacuum pump is used to adjust the vacuum degree in the storage tank to reduce the pressure of the aviation kerosene flowing into the transparent volute;

[0018] Two electric flow control valves are respectively arranged on the first pipeline and the second pipeline. The electric flow control valves are used to adjust the flow rate of the aviation kerosene in the first pipeline and the second pipeline;

[0019] A controller, which is used to adjust the rotation speed of the driving member according to the observed hydrodynamic cavitation situation of the aviation kerosene in the transparent volute, control the vacuum pump to adjust the vacuum degree in the storage tank, or adjust the valve opening of the two electric flow control valves.

[0020] In at least one embodiment of the present invention, pressure sensors are provided at positions on the first pipeline and the second pipeline close to the transparent volute, and the pressure sensors are used to monitor the pressure changes inside the centrifugal pump; flow meters are provided on both the first pipeline and the second pipeline, and the flow meters are used to monitor the flow condition of the aviation kerosene; both of the two pressure sensors and / or both of the two flow meters are in signal connection with a controller.

[0021] In at least one embodiment of the present invention, a torque sensor is connected to the driving member, and the torque sensor is in signal connection with the controller.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0023] 1. The aviation kerosene sterilization centrifugal pump proposed by the present invention is composed of a transparent volute, an impeller and a driving member. When the sterilization centrifugal pump is in use, aviation kerosene is pumped into the sterilization centrifugal pump, and the driving member is started to drive the impeller to rotate, so that the impeller drives the aviation kerosene to generate high-speed fluid motion. The kerosene forms a low pressure in a local area, causing the dissolved gas in the kerosene to be quickly released to form bubbles. After the bubbles enter the high-pressure area, they burst, releasing high temperature (up to thousands of degrees Celsius) and high pressure (up to hundreds of megapascals), directly destroying the microbial cell wall and internal structure, thereby achieving the sterilization effect; the use of this sterilization method can achieve the complete sterilization of aviation kerosene compared with the traditional filtration sterilization and chemical agent sterilization, and the sterilization process completely relies on physical effects without chemical reagents, avoiding the influence of chemical residues on the quality of kerosene; and because the liquid inlet and outlet of the transparent volute are both opened on the rear side wall, the blades of the impeller face the liquid inlet, and the driving member for driving the impeller to rotate is arranged on the rear side wall of the impeller. The above design enables the aviation kerosene to flow more smoothly to the impeller after entering the transparent volute, ensuring that the impeller acts on the aviation kerosene more evenly, capable of generating more stable and efficient cavitation bubbles, reducing the turbulence and unnecessary vibration in the pump, and allowing the operator to more easily observe the occurrence of cavitation phenomenon, so as to better adjust the equipment parameters (such as flow rate, pressure, etc.) to ensure the optimization of the sterilization effect.

[0024] 2. The aviation kerosene sterilization system proposed by the present invention has its aviation kerosene storage tank connected to the aviation kerosene sterilization centrifugal pump through the first pipeline and the second pipeline, so that the entire aviation kerosene sterilization system supports closed-loop circulation operation and can meet the requirements of continuous sterilization in large-scale industrial production. The system structure is simple, can be seamlessly connected with the existing kerosene storage, transportation and filling processes, and is convenient for popularization and application. And the basic evaluation of the sterilization process can be realized by measuring the inlet and outlet pressure and flow rate. The operation is simple and the reliability is high. The device structure is concise, and the component replacement cycle is long, suitable for long-term stable operation. Description of the Drawings

[0025] Figure 1Schematic diagram of the overall structure of the sterilization system of the present invention;

[0026] Figure 2 Simplified structural diagram of the sterilization system of the present invention;

[0027] Figure 3 Schematic diagram of the overall structure of the sterilization centrifugal pump of the present invention;

[0028] Figure 4 Schematic diagram of the sectional view of the transparent volute of the sterilization centrifugal pump of the present invention Figure 1 ;

[0029] Figure 5 Schematic diagram of the impeller structure of the sterilization centrifugal pump of the present invention;

[0030] Figure 6 Schematic diagram of the sectional view of the transparent volute of the sterilization centrifugal pump of the present invention Figure 1 ;

[0031] Figure 7 For the present invention Figure 6 Schematic diagram of the partial structure.

[0032] Explanation of reference numerals:

[0033] 1. Transparent volute; 11. Installation pipe; 2. Impeller; 21. Cover plate; 211. Transmission shaft; 22. Blades; 3. Driving member; 31. Torque sensor; 4. Sealing mechanism; 41. Sealing housing; 42. Impeller cover plate sealing ring; 5. Storage tank; 51. First pipeline; 511. Y-type filter; 52. Second pipeline; 53. Electric flow control valve; 6. Vacuum pump; 7. Pressure sensor; 8. Flowmeter; 9. Controller. Detailed implementation manners

[0034] The drawings in the present invention are not strictly drawn according to the actual proportion, and the specific dimensions and quantities of each structure can be determined according to actual needs. The drawings described in the present invention are only schematic diagrams of the structure.

[0035] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings of the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0036] Unless otherwise defined, technical terms or scientific terms used herein shall have the ordinary meanings as understood by those of ordinary skill in the art to which the present invention pertains. The "first", "second" and similar terms used in the present invention do not denote any order, quantity or importance, but are only used to distinguish different components. Words such as "comprising" or "including" mean that the elements or objects appearing before this word cover the elements or objects listed after this word and their equivalents, without excluding other elements or objects. "Inside", "outside", "above", "below", "far", "near", "front", "rear", etc. are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0037] Currently, the sterilization treatment technologies for aviation kerosene mainly include: filtration sterilization and chemical agent sterilization.

[0038] Among them, filtration sterilization can only remove suspended particles, but cannot completely kill the microorganisms in kerosene. And the filter element is prone to clogging and needs to be replaced frequently, increasing the operation and maintenance costs. The processing efficiency of the filtration method is low and cannot meet the requirements of high-flow and large-scale industrial processing. The centrifugal pump device of the present invention can be seamlessly connected with the existing aviation kerosene treatment process, supports large-scale and continuous processing, and meets the industrialization requirements. The equipment structure is compact, easy to install and maintain, and suitable for long-term operation.

[0039] Chemical agent sterilization may change the chemical properties of aviation kerosene, resulting in a decrease in the combustion efficiency of the aviation fuel or affecting its stability. And there may be residual components in the kerosene after using chemical agents, leading to potential safety hazards or incomplete combustion during subsequent use. The treatment and waste discharge of chemical agents are likely to cause environmental pollution. Chemical agents need to be replenished regularly, increasing the operation cost, and there are special requirements for storage and transportation. The present invention uses the shear force and high-speed micro-jet generated by hydrodynamic cavitation to kill the microorganisms in kerosene, realizing efficient physical sterilization and avoiding the influence of chemical agents on the quality of kerosene. At the same time, no chemical residues are generated during the sterilization process, ensuring the stability and safety of the fuel.

[0040] Combined with Figures 1 to 7 As shown in

[0041] The rear side wall of the transparent volute 1 is provided with a liquid inlet and a liquid outlet, and the liquid inlet is located at the middle position of the rear side wall of the transparent volute 1;

[0042] The impeller 2 includes: a cover plate 21 and a plurality of blades 22. The cover plate 21 is rotatably connected in the transparent volute 1. The center of the cover plate 21 is directly opposite to the liquid inlet. A plurality of blades 22 are all arranged on the side surface of the cover plate 21 close to the liquid inlet. A plurality of blades 22 are all arc-shaped, and a plurality of blades 22 are evenly distributed on the cover plate 21;

[0043] The driving member 3 is arranged at the rear side of the transparent volute 1. The rotating shaft of the driving member 3 is connected to the rear side wall of the cover plate 21. The driving member 3 is used to drive the cover plate 21 to rotate. Different from the actual configuration of a centrifugal pump and other experimental systems, this system adopts a design scheme where the liquid inlet is on the same side as the transmission shaft 211, which helps the flow to be smoother, ensures the stability of liquid flow, reduces the phenomena of turbulence and stagnation, ensures a stable cavitation phenomenon, and at the same time facilitates the optical observation of the cavitation condition. Its functions are as follows:

[0044] 1. Optimize the cavitation phenomenon: After the aviation kerosene enters the vacuum pump from the water inlet, it can flow more smoothly towards the impeller. In this way, the action of the impeller on the aviation kerosene is more uniform, and more stable and efficient cavitation bubbles can be generated, thereby improving the sterilization efficiency.

[0045] 2. Reduce turbulence and vibration: The design with the water inlet on the same side as the rotating shaft reduces the turbulence and unnecessary vibration inside the pump, helps to reduce the wear and maintenance cost of the equipment, and at the same time ensures the long-term stability of the sterilization effect.

[0046] 3. Facilitate the observation of the cavitation process: Due to the design with the water inlet on the same side as the rotating shaft, the operator can more easily observe the occurrence of the cavitation phenomenon, so as to better adjust the equipment parameters (such as flow rate, pressure, etc.) to ensure the optimization of the sterilization effect.

[0047] As an alternative embodiment, the number of blades 22 on the cover plate 21 is 4. The wrap angle of each blade 22 is 138° - 139°. The inlet installation angle of each blade 22 is 18° - 20°. The outlet installation angle of each blade 22 is 40° - 42°. Preferably, the wrap angle of the blade 22 is 138.51°. The inlet installation angle of each blade 22 is 18° - 20°. More preferably, the inlet installation angle of the blade 22 is 18.87°. The outlet installation angle of each blade 22 is 40° - 42°. Preferably, the outlet installation angle of the blade 22 is 40.98°. Impeller outlet diameter: 160 mm; impeller inlet diameter: 16 mm; volute base circle diameter: 168 mm; blade width: 10 mm; design flow rate: 5 m 3 / h; design speed: 2900 rpm; design head: 40 m. The shape of the impeller 2 can effectively guide the flow of the fluid, reduce the flow resistance, and ensure the stable flow of the kerosene inside the impeller 2. The curvature design of the blade 22 is suitable for the working environment under high-speed rotation conditions, which helps to maintain the fluid pressure difference inside the pump and maintain a stable and uniform cavitation phenomenon.

[0048] The internal flow channel design of the impeller 2 balances the pressure distribution of the fluid, reduces the turbulence caused by uneven flow velocity, and ensures the continuity and stability of cavitation bubble generation. In view of the low viscosity characteristics of aviation kerosene, the flow channel design further improves the smooth transition of the fluid and reduces the risk of cavitation instability. The stable pressure and flow velocity distribution contribute to the stable formation and fixed-point rupture of cavitation bubbles, improving the killing efficiency of microorganisms. The uniform flow channel design enables the fluid energy to be better transmitted to the cavitation area, enhancing the overall sterilization efficiency.

[0049] As an alternative embodiment, an installation pipe 11 is provided at the liquid inlet on the rear side wall of the transparent volute 1. The installation pipe 11 is used to connect with the liquid inlet pipeline. A transmission shaft 211 connected to the cover plate 21 is provided in the installation pipe 11. A sealing mechanism 4 is provided at one end of the installation pipe 11 away from the transparent volute 1. The transmission shaft 211 passes through the sealing mechanism 4 and is connected to the rotating shaft of the driving member 3.

[0050] As an alternative embodiment, the sealing mechanism 4 includes:

[0051] A sealing shell 41 is arranged at one end of the installation pipe 11 away from the transparent volute 1, and an installation groove 411 is provided inside the sealing shell 41;

[0052] The mechanical seal 42 includes a connecting disk 421 and a sleeve 422. The sleeve 422 is vertically penetrated through the connecting disk 421. The connecting disk 421 is arranged in the installation groove 411. The sleeve 422 extends into the installation pipe 11. The transmission shaft 211 passes through the sleeve and penetrates out of the sealing shell 41. The mechanical seal 42 is used to prevent the fluid from leaking through the rotating shaft of the driving member 3 during rotation; this seal forms a sealing effect by the cooperation of the connecting disk 421 and the sealing outer shell 41 and can withstand a relatively high working pressure; the sealing outer shell 41 plays a role in fixing the mechanical seal 42 and providing support for it. The inner wall of the sealing outer shell 42 contacts the connecting disk 421 of the mechanical seal to form a sealing interface.

[0053] Mechanical seal and outer shell model design:

[0054] In this device, the mechanical seal is used to isolate the internal and external environments of the vacuum pump and prevent the leakage of kerosene. The mechanical seal system ensures that the kerosene does not come into contact with the outside world inside the vacuum pump through the action of the sealing surface and the pressure difference. The mechanical seal design not only has the characteristics of high pressure resistance and wear resistance, but also can work stably in environments with high flow rate, high temperature and high pressure to ensure that the kerosene does not leak.

[0055] To enhance the stability of the sealing system, a specially designed sealing housing 41 is used. This sealing housing 41 has excellent performance in corrosion resistance and high pressure resistance, and is suitable for handling aviation kerosene, a volatile and flammable liquid. Through the optimized design of the sealing housing 41, the stability and sealing performance of the sealing system are enhanced, ensuring that kerosene will not leak under high pressure conditions, avoiding system failures and fire hazards.

[0056] As an alternative embodiment, an elastic coupling is provided at the end of the drive shaft 211, and the rotating shaft of the driving member 3 is connected to the elastic coupling; specifically, the elastic coupling is used to slow down the impact, compensate for minor shaft alignment errors, and can effectively absorb the stress caused by load changes or vibrations, extending the service life of the equipment. Further, a torque sensor is connected to the driving member 3.

[0057] The present invention also proposes an aviation kerosene sterilization system based on hydrodynamic cavitation, including:

[0058] A first pipeline 51 communicating with the installation pipe 211 is provided at the bottom of the side wall of the storage tank 5, and a second pipeline 52 communicating with the liquid outlet of the transparent volute 1 is provided at the top of the side wall of the storage tank 5;

[0059] A vacuum pump 6 is connected to the storage tank 5 for adjusting the vacuum degree in the storage tank 5 to reduce the pressure of aviation kerosene flowing into the transparent volute 1;

[0060] Two electric metering valves 53 are respectively arranged on the first pipeline 51 and the second pipeline 52; the electric metering valve 53 is used to adjust the flow rate of aviation kerosene in the first pipeline 51 and the second pipeline 52;

[0061] A controller 9 is in signal connection with the driving member 3, the vacuum pump 6 and the two electric metering valves 53; the controller 9 is used to adjust the rotation speed of the driving member 3, control the vacuum pump 6 to adjust the vacuum degree in the storage tank 5 and / or the valve opening of the two electric metering valves 53 according to the cavitation situation of aviation kerosene in the transparent volute 1 observed. Specifically, the controller 9 can directly adopt a computer.

[0062] As an alternative embodiment, a torque sensor 31 is connected to the driving member 3, and both the driving member 3 and the torque sensor 31 are in signal connection with the controller 9; the controller 9 is used to adjust the rotation speed of the driving member 3.

[0063] As an alternative embodiment, pressure sensors 7 are provided at positions on the first pipeline 51 and the second pipeline 52 close to the transparent volute 1. The pressure sensor 7 is used to monitor the pressure change inside the centrifugal pump to evaluate the strength of the cavitation effect and its impact on microbial sterilization, providing a quantitative basis for the sterilization process. Flow meters 8 are provided on both the first pipeline 51 and the second pipeline 52. The flow meter 8 is used to monitor the flow condition of the aviation kerosene. By precisely adjusting the flow rate of the kerosene, the flow rate is ensured to meet the cavitation conditions and the optimal cavitation conditions are achieved, guaranteeing the stability of the sterilization efficiency and the continuity of the treatment system. The two pressure sensors 7 and the two flow meters 8 are all connected to the controller 9 in signal. The above entire sterilization system is a closed-loop cycle. After pumping the aviation kerosene from the storage tank into the centrifugal pump, it returns to the storage tank 5 for circulation. This design can ensure that the kerosene is processed multiple times and fully sterilized. The closed-loop system ensures that the kerosene can continuously circulate during the treatment process. Through repeated cavitation sterilization in each cycle, the sterilization efficiency is significantly improved.

[0064] As an alternative embodiment, a Y-type filter 511 is further provided on the first pipeline 51. The Y-type filter is mainly used to filter impurities or particulate matters that may appear in the system, preventing these impurities from entering the sterilization equipment or affecting the normal operation of the system. It is set at the pipeline water inlet. By precisely filtering the solid particles in the liquid, the internal components of the equipment are protected from wear or blockage, the service life of the equipment is extended, the maintenance and downtime are reduced, the sterilization efficiency is improved, and the maintenance cost is lowered.

[0065] As an alternative embodiment, a high-speed camera is provided on the front side of the transparent volute 1. The high-speed camera is connected to the controller in signal. Specifically, the high-speed camera is set to monitor the dynamic situation during the sterilization process in real time. The high-speed camera can capture the key changes in the system at a high frame rate, such as the generation of cavitation bubbles, the flow pattern of the fluid or cavitation phenomena, etc., ensuring that the sterilization process is carried out under optimal conditions. Through the analysis of the real-time images, the system can detect potential fault problems, such as bubble aggregation or flow rate deviation, at an early stage, and thus make timely adjustments to ensure that the sterilization effect can reach the best.

[0066] Actual sterilization case of the present invention (hydrodynamic cavitation sterilization treatment of sulfate-reducing bacteria (SRB) in deionized water):

[0067] Equipment composition:

[0068] Centrifugal pump: The flow rate is 5m 3 / h, and the pressure difference between the inlet and outlet is 0.06 MPa.

[0069] Water storage tank: The capacity is 0.3m 3 , used to store deionized water.

[0070] Inlet and outlet pipelines: Equipped with pressure sensors and flow meters for monitoring pressure and flow rate.

[0071] Circulation system: Deionized water returns to the storage tank after being processed by a centrifugal pump from the storage tank, forming a closed-loop system. Experimental procedures:

[0072] S1. Inject 150 L of deionized water mixed with SRB into the water storage tank.

[0073] S2. Start the centrifugal pump, adjust the inlet and outlet pressure difference to 0.06 MPa, and keep the flow rate stable at 5 m 3 / h.

[0074] S3. Continuously operate for 15 minutes, and record the inlet and outlet pressures and flow rates.

[0075] S4. Take samples of deionized water before and after the experiment respectively to detect the microbial content.

[0076] Effect: The total number of SRB bacteria in deionized water before the experiment was 1.356×10 7 CFU / mL, and it decreased to 1.2×10 5 CFU / mL after the experiment, and the sterilization rate exceeded 99%.

[0077] Overall beneficial effects of the present invention:

[0078] 1. High-efficiency sterilization: The shear force and high-speed micro-jet (speed up to 100 m / s) generated when the cavitation bubbles collapse can effectively damage the cell membranes, cell walls and internal structures of microorganisms, causing mechanical damage and significantly improving the sterilization efficiency.

[0079] 2. No damage to fuel quality: The sterilization process completely relies on physical effects, without the need for chemical reagents, avoiding the influence of chemical residues on the quality of kerosene. The sterilization treatment will not change the physical and chemical properties of kerosene, ensuring the fuel purity and its high-efficiency combustion performance.

[0080] 3. Simplified design and cost reduction: Trigger the cavitation effect through a centrifugal pump, without the need for special impeller design or flow channel optimization, greatly reducing the equipment manufacturing cost. The system has low operating energy consumption, and no chemicals or filter consumables are required, further reducing the long-term operating cost.

[0081] 4. Environmental protection and safety: No chemical reagents or harmful substances are generated throughout the process, which is environmentally friendly and meets the requirements of modern industrial green development. The system adopts a sealed design to avoid kerosene leakage and ensure safety when dealing with flammable liquids.

[0082] 5. The device supports closed-loop circulation operation and can meet the needs of continuous sterilization in large-scale industrial production. The system structure is simple and can be seamlessly connected with the existing kerosene storage, transportation and filling processes, facilitating popularization and application.

[0083] 6. The basic evaluation of the sterilization process can be achieved by measuring the inlet and outlet pressures and flow rates, with simple operation and high reliability. The device has a simple structure and a long component replacement cycle, making it suitable for long-term stable operation.

[0084] 7. In addition to aviation kerosene, the technical solution of the present invention can also be widely applied to the sterilization treatment of other liquids (such as petrochemical raw materials, industrial solvents, medical liquids, etc.), with good application extensibility and market potential.

[0085] The above embodiments are only specific implementation manners of the present invention patent, used to illustrate the technical solution of the present invention patent, rather than limiting it. The protection scope of the present invention patent is not limited thereto. Although the present invention patent has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: any person skilled in the art within the technical scope disclosed by the present invention can still modify the technical solution recorded in the foregoing embodiments or can easily think of changes, or make equivalent replacements for some of the technical features; and these modifications, changes or replacements do not make the essence of the corresponding technical solution deviate from the spirit and scope of the technical solution implemented by the present invention patent, and should all be covered by the protection scope of the present invention.

Claims

1. A centrifugal pump for sterilizing aviation kerosene based on hydrodynamic cavitation, characterized in that Comprising: A transparent volute (1), the rear side wall of which is provided with a liquid inlet and a liquid outlet, and the liquid inlet is located at the middle position of the rear side wall of the transparent volute (1); An impeller (2), comprising: a cover plate (21) and a plurality of blades (22), the cover plate (21) is rotatably connected inside the transparent volute (1), the center of the cover plate (21) is aligned with the liquid inlet, and a plurality of the blades (22) are all arranged on the side of the cover plate (21) close to the liquid inlet. A plurality of the blades (22) are all arc-shaped, and a plurality of the blades (22) are evenly distributed on the cover plate (21); A driving member (3) is arranged at the rear side of the transparent volute (1), the rotating shaft of the driving member (3) is connected to the rear side wall of the cover plate (21), and the driving member (3) is used to drive the cover plate (21) to rotate.

2. The centrifugal pump for sterilizing aviation kerosene based on hydrodynamic cavitation according to claim 1, characterized in that, An installation pipe (11) is provided at the liquid inlet of the rear side wall of the transparent volute (1), the installation pipe (11) is used to be connected with a liquid inlet pipeline, a transmission shaft (211) connected to the cover plate (21) is arranged inside the installation pipe (11), a sealing mechanism (4) is arranged at one end of the installation pipe (11) far from the transparent volute (1), and the transmission shaft (211) passes through the sealing mechanism (4) and is connected to the rotating shaft of the driving member (3).

3. The centrifugal pump for sterilizing aviation kerosene based on hydrodynamic cavitation according to claim 1, characterized in that The number of the blades (22) on the cover plate (21) is 3 to 5, the wrap angle of each of the blades (22) is 138° to 139°, the inlet installation angle of each of the blades (22) is 18° to 20°, and the outlet installation angle of each of the blades (22) is 40° to 42°.

4. The centrifugal pump for sterilizing aviation kerosene based on hydrodynamic cavitation according to claim 2, wherein The sealing mechanism (4) comprises: A sealing shell (41) is arranged at one end of the installation pipe (11) far from the transparent volute (1), and an installation groove (411) is formed inside the sealing shell (41); A mechanical seal (42), comprising a connection disk (421) and a sleeve (422), the sleeve (422) vertically penetrates through the connection disk (421), the connection disk (421) is arranged inside the installation groove (411), the sleeve (422) extends into the installation pipe (11), and the transmission shaft (211) passes through the sleeve and penetrates out of the sealing shell (41).

5. The aero-kerosene sterilization centrifugal pump based on hydrodynamic cavitation according to claim 3, characterized in that, An elastic coupling is arranged at the end of the transmission shaft (211), and the rotating shaft of the driving member (3) is connected to the elastic coupling.

6. A sterilization system for aviation kerosene based on hydrodynamic cavitation, based on the centrifugal pump for sterilizing aviation kerosene based on hydrodynamic cavitation described in claim 2, characterized in that, Comprising: A storage tank (5), the bottom of the side wall of which is provided with a first pipeline (51) communicated with the installation pipe (211), and the top of the side wall of the storage tank (5) is provided with a second pipeline (52) communicated with the liquid outlet of the transparent volute (1); A vacuum pump (6) is connected to the storage tank (5) and is used to adjust the vacuum degree inside the storage tank (5) so as to reduce the pressure of the aviation kerosene flowing into the transparent volute (1); Two electric flow regulating valves (53) are respectively arranged on the first pipeline (51) and the second pipeline (52); the electric flow regulating valves (53) are used to adjust the flow rate of the aviation kerosene inside the first pipeline (51) and the second pipeline (52). A controller (9), which is signal-connected to the driving member (3), the vacuum pump (6) and the two electric metering valves (53); the controller (9) is configured to adjust the rotational speed of the driving member (3) according to the cavitation condition of the aviation kerosene in the transparent volute (1), control the vacuum pump (6) to adjust the vacuum degree in the storage tank (5) and / or the valve opening degrees of the two electric metering valves (53).

7. The aero-kerosene sterilization system based on hydrodynamic cavitation according to claim 6, characterized in that, Pressure sensors (7) are provided at positions close to the transparent volute (1) on both the first pipeline (51) and the second pipeline (52), and the pressure sensors (7) are used to monitor the pressure changes in the centrifugal pump; flow meters (8) are provided on both the first pipeline (51) and the second pipeline (52), and the flow meters (8) are used to monitor the flow condition of the aviation kerosene; the two pressure sensors (7) and the two flow meters (8) are all signal-connected to the controller (9).

8. The aero-kerosene sterilization system based on hydrodynamic cavitation according to claim 6, characterized in that, A torque sensor (31) is connected to the driving member (3), and the torque sensor (31) is signal-connected to the controller (9).

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