Device for purifying microorganisms in aviation kerosene based on hydrodynamic cavitation principle

Abstract

The utility model discloses a device for purifying microorganisms in aviation kerosene based on a hydrodynamic cavitation principle. Comprising a cavitation generation unit, an inflation unit, an oil gas recovery unit, a control system, an oil-water separation unit, an impurity and moisture filtering system, a microorganism filtering unit, a feedback sensor, an overflow system and a fluid transmission system. The high-efficiency hydrodynamic cavitation technology is adopted as a core purification mechanism, high-efficiency purification of microorganisms in the aviation kerosene is achieved, chemical additives are not needed, secondary pollution is avoided, and the quality and safety of the aviation kerosene are guaranteed. The system is suitable for treatment of aviation kerosene with different pollution degrees, and the adaptability and efficiency of the system are improved. The purification efficiency and the treatment speed of aviation kerosene are remarkably improved, and meanwhile, the energy and operation cost is reduced. In addition, the device gives consideration to both environmental protection and economical efficiency, not only meets the current strict requirements on the quality and environmental protection of the aviation kerosene, but also provides a new technical path for the field of aviation kerosene purification.

Description

Technical Field

[0001] The utility model belongs to the technical field of fuel treatment, and particularly relates to a device for purifying microorganisms in aviation kerosene based on the principle of hydraulic cavitation. Background Art

[0002] Hydrodynamic cavitation is a physical phenomenon in which cavitation bubbles are formed when the local pressure of a fluid drops below the vapor pressure during high-speed flow, and then collapse instantly when the pressure is restored. Taking advantage of this feature, hydrodynamic cavitation is often used to purify microorganisms in aviation kerosene, with the following characteristics:

[0003] (1) High efficiency: The formation and collapse process of cavitation bubbles can produce extreme conditions in a very short time, such as strong microjets, which enables hydrodynamic cavitation to quickly destroy the cell walls and cell membranes of microorganisms, thereby effectively sterilizing them.

[0004] (2) Non-chemical: Hydrodynamic cavitation sterilization does not rely on chemical disinfectants, so it does not introduce additional chemicals, avoids the problem of chemical residues, and can ensure the cleanliness of aviation kerosene.

[0005] (3) Broad spectrum: Since its mechanism of action is physical rather than chemical, it can have a destructive effect on various types of microorganisms (including bacteria, viruses, fungi, etc.), and therefore has a broad-spectrum sterilization ability.

[0006] (4) Energy saving and environmental protection: Compared with traditional thermal disinfection or chemical disinfection methods, the energy consumption in the hydraulic cavitation sterilization process is lower, no harmful chemicals are produced, and the impact on the environment is relatively small.

[0007] (5) Simple equipment: Hydraulic cavitation sterilization equipment is relatively simple, mainly relying on the high-speed flow and pressure changes of the fluid to produce the cavitation effect, so it is easy to implement and maintain.

[0008] (6) Safe and reliable: Although the collapse of cavitation bubbles will generate instantaneous local high temperature (5000-10000K) and high pressure (500-1000atm), the overall process does not require heating the entire system like traditional thermal disinfection, and the entire system uses explosion-proof equipment, materials and processes, which means that heat-sensitive materials and equipment are safer.

[0009] As an important aviation fuel, the quality of aviation kerosene directly affects the performance and safety of aircraft. Microbial contamination is a common problem in the process of receiving, transferring, storing, issuing and filling aviation kerosene. The presence of microorganisms will accelerate the corrosion of aviation kerosene storage containers and aircraft fuel tanks, making the coating of the container wall soft; under favorable conditions, they will multiply in large numbers, and may also cause corrosion and blockage of the fuel system, which may even endanger flight safety. Therefore, effective methods for microbial purification in aviation kerosene are of vital importance to ensure the normal operation and flight safety of aircraft. The "Civil Aviation Fuel Quality Control and Operation Procedures" (MH / T 6020-2012) clearly stipulates that unapproved chemicals or cleaning agents that may contaminate the fuel should not be used when cleaning the oil tank; fuel containing bactericides should be pumped out by special oil trucks, and the extracted aviation fuel should be degraded. At present, traditional methods for microbial purification in aviation kerosene mainly include sewage discharge and sedimentation of storage and transportation containers, physical filtration of filtration systems, regular cleaning of storage and transportation equipment, and degrading treatment. Although these methods can alleviate the problem of microbial contamination to a certain extent, they each have certain limitations and are unable to completely remove microorganisms and their metabolites. For example, the degradation of aviation fuel will greatly increase the operating costs of enterprises. Summary of the invention

[0010] In order to solve the above problems, the purpose of the utility model is to provide a device for purifying microorganisms in aviation kerosene based on the principle of hydrodynamic cavitation.

[0011] In order to achieve the above-mentioned purpose, the device for purifying microorganisms in aviation kerosene based on the principle of hydraulic cavitation provided by the utility model comprises: a cavitation generating unit, an air charging unit, an oil and gas recovery unit, a control system, an oil-water separation unit, an impurity and moisture filtering system, a microorganism filtering unit, a feedback sensor, an overflow system and a fluid transmission system; wherein the fluid transmission system comprises an oil pipeline, an overflow pipeline, an exhaust pipeline, an oil discharge pipeline, an air intake pipeline and an oil pump; the two ends of the oil pipeline are respectively connected to the oil inlet of the cavitation generating unit and the oil tank; the two ends of the overflow pipeline are respectively connected to the middle part of the oil pipeline and the oil tank; the two ends of the exhaust pipeline are respectively connected to the exhaust port of the cavitation generating unit and the inlet of the oil and gas recovery unit; the two ends of the oil discharge pipeline are respectively connected to the exhaust port of the cavitation generating unit and the inlet of the oil and gas recovery unit; the two ends of the oil discharge pipeline are respectively connected to the exhaust port of the cavitation generating unit The oil port and the oil tank are connected; the two ends of the air intake pipeline are respectively connected to the air intake of the cavitation generating unit and the charging unit; the inlet and outlet of the oil-water separation unit, the oil pump and the impurity and moisture filtering system are sequentially connected to the oil pipeline between the connection between the overflow pipeline and the oil pipeline and the oil tank, and the oil-water separation unit is close to the oil tank; the overflow system includes an overflow valve and a flow regulating valve; the overflow valve is installed on the overflow pipeline; the flow regulating valve is installed on the oil pipeline and the air intake pipeline; the feedback sensor includes a temperature sensor and a pressure sensor; the oil pipeline and the oil discharge pipeline are both equipped with a temperature sensor; the oil pipeline, the oil discharge pipeline and the air intake pipeline are all equipped with a pressure sensor; the control system is electrically connected to the cavitation generating unit, the charging unit, the feedback sensor, the overflow system and the oil pump respectively.

[0012] The cavitation generating unit comprises a shell and a plurality of orifice plates which are arranged in series and vertically spaced inside the shell; wherein an oil inlet and an air inlet are arranged at one end of the shell, and an exhaust port and an oil discharge port are arranged at the other end; and a plurality of holes are radially formed on each orifice plate.

[0013] The spacing of the orifice plate is 20 mm, and the thickness is 1 mm; the longitudinal section of the hole is an isosceles trapezoid, the aperture at the center is 4 mm, the center angle α=45°, and the small aperture is located on the oil inlet side.

[0014] The inflation unit adopts an air compressor.

[0015] The oil and gas recovery unit comprises an outer shell, a molecular sieve and a condenser arranged in the outer shell; an inlet, a gas discharge port and a liquid discharge port are arranged on the outer shell.

[0016] The control system adopts Siemens S7-1200 series programmable logic controller.

[0017] The oil-water separation unit comprises a shell, a cyclone feed chamber arranged at the upper part of the shell, and a plurality of cyclone separators arranged at the lower part of the shell; a drain port is arranged at the bottom of the cyclone separator, and an aviation kerosene discharge port is arranged at the bottom of the shell; a liquid inlet pipe connected to the cyclone feed chamber is arranged along the tangential direction on the side of the shell; and a plurality of diversion ports respectively connected to the plurality of cyclone separators are arranged on the cyclone feed chamber.

[0018] The impurity and moisture filtering system comprises a shell, a filter screen, a microporous filter membrane and an activated carbon filter element; an inlet and an outlet are respectively arranged at both ends of the shell; the filter screen, the microporous filter membrane and the activated carbon filter element are arranged inside the shell in sequence from the inlet to the outlet.

[0019] The microbial filtration unit comprises a shell and a multi-layer polytetrafluoroethylene filter membrane arranged in the shell.

[0020] The models of the temperature sensor and pressure sensor are PT100 and PT124G-210 respectively; the models of the overflow valve and flow control valve are HG-06 and ZDLP-16C respectively; the oil pipeline, overflow pipeline, exhaust pipeline, oil discharge pipeline and intake pipeline all use high-pressure resistant pipelines.

[0021] The utility model has the following technical effects:

[0022] (1) Innovative use of high-efficiency hydraulic cavitation technology as the core purification mechanism, this technology generates high-speed fluid and the collapse of tiny bubbles in the liquid, and uses the extreme physical conditions (such as strong shock waves) generated by the bubble collapse to effectively destroy the cell walls of microorganisms, thereby achieving efficient purification of microorganisms in aviation kerosene. This technology overcomes the limitations of traditional chemical and physical methods, does not require chemical additives, avoids secondary pollution, and at the same time ensures the quality and safety of aviation kerosene.

[0023] (2) An innovative integrated advanced real-time monitoring system, including pressure and temperature sensors, and a control system based on a programmable logic controller. These components work together to not only monitor the purification process in real time, but also automatically adjust the cavitation intensity and flow rate to ensure the optimization of the purification effect. This is particularly suitable for the treatment of aviation kerosene with different levels of contamination, improving the adaptability and efficiency of the system.

[0024] (3) The purification efficiency and processing speed of aviation kerosene are significantly improved, while reducing energy and operating costs. In addition, this device takes into account both environmental protection and economy, not only meeting the current strict requirements for aviation kerosene quality and environmental protection, but also providing a new technical path for the field of aviation kerosene purification. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a block diagram of the device for purifying microorganisms in aviation kerosene based on the principle of hydraulic cavitation provided by the utility model;

[0026] Figure 2 This is a schematic diagram of the structure of a device for purifying microorganisms in aviation kerosene based on the principle of hydraulic cavitation provided by the utility model;

[0027] Figure 3 This is a schematic diagram of the orifice plate structure in the device;

[0028] Figure 4 It is a longitudinal cross-sectional view of the holes on the orifice plate in this device. DETAILED DESCRIPTION

[0029] The utility model is described in detail below with reference to the accompanying drawings.

[0030] like Figures 1 to 4 As shown, the device for purifying microorganisms in aviation kerosene based on the principle of hydraulic cavitation provided by the utility model comprises: a cavitation generating unit 1, an air charging unit 2, an oil and gas recovery unit 3, a control system 4, an oil-water separation unit 5, an impurity and moisture filtering system 6, a microorganism filtering unit 7, a feedback sensor 8, an overflow system 9 and a fluid transmission system 10; wherein the fluid transmission system 10 comprises an oil delivery pipeline 10-1, an overflow pipeline 10-2, an exhaust pipeline 10-3, an oil discharge pipeline 10-4, an air intake pipeline 10-5, and an exhaust pipeline 10-6. 10-5 and oil pump 10-6; the two ends of the oil pipeline 10-1 are respectively connected to the oil inlet of the cavitation generating unit 1 and the oil tank 11; the two ends of the overflow pipeline 10-2 are respectively connected to the middle of the oil pipeline 10-1 and the oil tank 11; the two ends of the exhaust pipeline 10-3 are respectively connected to the exhaust port of the cavitation generating unit 1 and the inlet of the oil and gas recovery unit 3; the two ends of the oil discharge pipeline 10-4 are respectively connected to the oil discharge port of the cavitation generating unit 1 and the oil tank 11; the two ends of the intake pipeline 10-5 The air inlet of the cavitation generating unit 1 and the air charging unit 2 are connected respectively; the inlet and outlet of the oil-water separation unit 5, the oil pump 10-6 and the impurity and moisture filtering system 6 are connected in sequence to the oil pipeline 10-1 between the connection between the overflow pipeline 10-2 and the oil pipeline 10-1 and the oil tank 11, and the oil-water separation unit 5 is close to the oil tank 11; the overflow system 9 includes an overflow valve 9-1 and a flow regulating valve 9-2; the overflow valve 9-1 is installed on the overflow pipeline 10-2; the oil pipeline 10-1 A flow regulating valve 9-2 is installed on the intake pipeline 10-5; the feedback sensor 8 includes a temperature sensor 8-1 and a pressure sensor 8-2; the oil pipeline 10-1 and the oil discharge pipeline 10-4 are both installed with a temperature sensor 8-1; the oil pipeline 10-1, the oil discharge pipeline 10-4 and the intake pipeline 10-5 are all installed with a pressure sensor 8-2; the control system 4 is electrically connected to the cavitation generating unit 1, the charging unit 2, the feedback sensor 8, the overflow system 9 and the oil pump 10-6 respectively.

[0031] The cavitation generating unit 1 is used to purify microorganisms in aviation kerosene, and includes a shell 1-1 and a plurality of orifice plates 1-2 arranged in series along a vertical direction inside the shell 1-1; wherein an oil inlet and an air inlet are arranged at one end of the shell 1-1, and an exhaust port and an oil discharge port are arranged at the other end; and a plurality of holes 1-3 are radially formed on each orifice plate 1-2.

[0032] The spacing between the orifice plates 1-2 is 20 mm and the thickness is 1 mm; the longitudinal section of the hole 1-3 is an isosceles trapezoid, the aperture at the center is 4 mm, the center angle α=45°, and the small aperture is located on the oil inlet side.

[0033] The inflation unit 2 is used to increase the gas content in aviation kerosene, and an air compressor is used; the reasons for selecting air as the inflation medium are: ① Injecting air can effectively increase the gas content in aviation kerosene, which is crucial for the formation of cavitation bubbles during the hydrodynamic cavitation process. Components such as oxygen and nitrogen in the air easily form tiny bubbles in high-speed flow, and the energy released by these bubbles when they collapse helps to more effectively destroy the cell walls of microorganisms, thereby enhancing the purification effect of hydrodynamic cavitation. ② As a non-flammable and non-harmful gas, air is highly safe to use in the system. Compared with other gases that may have flammable, explosive or toxic properties, the use of air reduces operational risks and increases the overall safety of the system. ③ Since air can be obtained for free, it is more economical to use air as an inflation medium than using other gases such as nitrogen, oxygen, etc., which makes the operating cost of the entire system lower and more suitable for industrial applications with long-term continuous operation. ④ Good compatibility with equipment. ⑤ The biggest advantage of air is that it is easy to obtain. Air is ubiquitous and does not require a special production or refining process. It can be collected directly from the environment, which greatly reduces operating costs.

[0034] The oil and gas recovery unit 3 is used to recover the oil and gas mixture discharged from the cavitation generating unit 1 to prevent air pollution and waste of resources, thereby ensuring the purity of the aviation kerosene and the pressure stability of the entire device, including a shell and a molecular sieve and a condenser arranged in the shell; the shell is provided with an inlet, a gas discharge port and a liquid discharge port; the molecular sieve is a highly efficient adsorption material with a high surface area, which can adsorb part of the oil vapor in the oil and gas mixture. Through physical adsorption, the oil vapor is effectively captured from the oil and gas mixture, thereby realizing the recovery of the oil. Then, the oil and gas mixture after physical adsorption is made to flow into the condenser to reduce the temperature, so that the oil vapor therein is condensed into liquid oil, further improving the recovery rate of the oil. The liquid oil collected during the condensation process can be discharged through the liquid discharge port and directly recycled, reducing the loss of raw materials. The remaining gas after the condensation process and the above-mentioned oil vapor are discharged through the gas discharge port, and then undergo strict purification treatment to ensure that the gas discharged into the atmosphere meets environmental protection requirements and avoids pollution to the environment.

[0035] The control system 4 adopts Siemens S7-1200 series programmable logic controller (PLC) to accurately control the entire purification process.

[0036] Water is one of the key factors for the growth of microorganisms in aviation kerosene. Microorganisms need water to maintain their life activities, such as metabolism and reproduction. In aviation kerosene, even a very small amount of water may become a breeding ground for microorganisms, especially during storage and transportation, when tiny water droplets can provide a sufficient living environment for microorganisms. Therefore, in the process of purifying microorganisms in aviation kerosene, the water removal link is particularly important. Therefore, the utility model sets an oil-water separation unit 5 on the oil pipeline 10-1. The oil-water separation unit 5 adopts cyclone separation technology and diversion and dispersion technology to remove water from aviation kerosene, including a shell, a cyclone feed chamber arranged at the upper part of the shell, and a plurality of cyclone separators arranged at the lower part of the shell; a drain port is arranged at the bottom of the cyclone separator, and an aviation kerosene discharge port is arranged at the bottom of the shell; a liquid inlet pipe connected to the cyclone feed chamber is arranged on the side of the shell along the tangential direction; a plurality of diversion ports respectively connected to a plurality of cyclone separators are arranged on the cyclone feed chamber; the aviation kerosene first enters the cyclone feed chamber along the tangential direction through the liquid inlet pipe, and then is evenly distributed to a plurality of cyclone separators through the diversion ports. Each cyclone separator is an independently working unit, and such a design is intended to reduce the flow rate in a single separator, thereby reducing turbulence and improving separation efficiency. The aviation kerosene forms a high-speed rotating vortex in each cyclone separator, and separates the oil and water with the help of centrifugal force. In the cyclone separator, due to the action of centrifugal force, the water with higher density is thrown to the periphery and moves downward, and then discharged through the drain port at the bottom. At the same time, the oil with lower density is concentrated in the center of the cyclone separator and sent to the impurity and moisture filtration system 6 through the aviation kerosene discharge port at the bottom of the shell through the oil pipeline 10-1, while the moisture is discharged through the water collection and discharge component, finally achieving oil-water separation.

[0037] The impurity and moisture filtering system 6 is used to filter impurities and moisture in aviation kerosene to further improve its purity, and includes a housing, a filter screen, a microporous filter membrane and an activated carbon filter element; the two ends of the housing are respectively provided with an inlet and an outlet; the filter screen, the microporous filter membrane and the activated carbon filter element are sequentially arranged inside the housing from the inlet to the outlet. The filter screen can quickly and effectively intercept larger impurities, sediments and water droplets in aviation kerosene, ensuring that the aviation kerosene entering the microporous filter membrane for treatment is relatively clean; the microporous filter membrane has a micron-level pore size, which can effectively intercept tiny solid particles and residual microorganisms; and the activated carbon filter element can absorb organic matter and odor substances, improve the cleanliness and quality of aviation kerosene, thereby meeting the standard requirements of the aviation industry.

[0038] The microbial filtration unit 7 is used to filter and capture the microbial debris destroyed in the cavitation generating unit 1 to ensure the purity of the aviation kerosene, and includes a housing and a multi-layer polytetrafluoroethylene (PTFE) filter membrane arranged in the housing. The reason for selecting PTFE is its excellent chemical inertness, which can ensure its high compatibility with aviation kerosene and avoid any possible chemical contamination. In order to achieve efficient microbial filtration effect, the pore size of the filter membrane is precisely set to 200 nanometers. The selection of this size is based on the fact that the volume range of most bacteria is from 0.5 microns to 5 microns, thereby ensuring that microbial debris can be effectively captured without hindering the fluidity of aviation kerosene. In order to maximize the filtration efficiency, the PTFE filter membrane is designed as a multi-layer structure.

[0039] The models of the temperature sensor 8 - 1 and the pressure sensor 8 - 2 are PT100 and PT124G-210 respectively, which are used to monitor the operating status of the system in real time and feed back the data to the control system 4 .

[0040] The models of the overflow valve 9-1 and the flow control valve 9-2 are HG-06 and ZDLP-16C respectively, which are used to ensure the safety of the device and pipelines and prevent system overpressure due to emergencies. This safety mechanism ensures that the system can remain stable even under abnormal flow increases or other abnormal conditions.

[0041] The oil delivery pipeline 10-1, overflow pipeline 10-2, exhaust pipeline 10-3, oil discharge pipeline 10-4 and air intake pipeline 10-5 are all high-pressure resistant pipelines to ensure that the quality of aviation kerosene is not affected during the transportation process.

[0042] The working principle of the device for purifying microorganisms in aviation kerosene based on the principle of hydrodynamic cavitation provided by the utility model is described as follows:

[0043] When it is necessary to degrade microorganisms in aviation kerosene, the operator first inputs initial parameters on the control system 4, such as the processing volume of aviation kerosene, cavitation intensity, desired temperature and pressure, etc., and then the control system 4 starts the cavitation generating unit 1 according to the above parameters, and starts the oil pump 10-6 at the same time, thereby transporting the aviation kerosene in the oil tank 11 to the cavitation generating unit 1 through the oil pipeline 10-1. In this process, the aviation kerosene first flows into the oil-water separation unit 5, which uses cyclone separation technology and diversion and dispersion technology to effectively remove moisture from the aviation kerosene to reduce the possibility of microbial growth, and then flows into the impurity and moisture filtration system 6 to further filter out impurities and moisture in the aviation kerosene to ensure its purity, and finally the aviation kerosene treated as above is sent to the cavitation generating unit 1. At the same time, under the control of the control system 4, the inflation unit 2 is used to inject high-pressure air into the aviation kerosene through the air intake pipeline 10-5 to enhance the cavitation effect. In the cavitation generating unit 1, when the aviation kerosene flows through the orifice plate 1-2, the smaller cross section on the hole 1-3 will have a large throttling effect on the aviation kerosene, so that the flow rate of the aviation kerosene suddenly increases and the lateral pressure decreases. When the static pressure of the fluid drops below the local saturated vapor pressure, part of the fluid molecules will be vaporized. These vaporized fluid molecules will become cavities, and then gradually grow into cavitation bubbles over time. With the further increase in pressure, the collapse of the cavitation bubbles occurs in a very short time, while releasing a large amount of energy, accompanied by the formation of strong shock waves, high-speed jets and other extreme conditions, thereby purifying the microorganisms in the aviation kerosene. The oil-gas mixture produced by the cavitation treatment enters the oil-gas recovery unit 3 through the exhaust pipe 10-3. The oil-gas recovery unit 3 can capture oil vapor from the oil-gas mixture to ensure that the gas discharged into the atmosphere meets environmental protection requirements and avoids pollution to the environment. After cavitation treatment, the aviation kerosene will be mixed with destroyed microbial debris, so the aviation kerosene after cavitation treatment will flow into the microbial filtration unit 7 through the oil discharge pipeline 10-4, thereby using the polytetrafluoroethylene filter membrane inside the microbial filtration unit 7 to filter out and capture these destroyed microbial debris, ensuring the purity of the aviation kerosene, and finally the clean aviation kerosene flows back to the oil tank 11. In the above treatment process, the temperature sensor 8-1 is used to monitor the temperature of the aviation kerosene in the oil pipeline 10-1 and the oil discharge pipeline 10-4 in real time, and the pressure sensor 8-2 is used to monitor the pressure of the aviation kerosene or high-pressure air in the oil pipeline 10-1, the oil discharge pipeline 10-4 and the intake pipeline 10-5 in real time, and the temperature and pressure detection data are transmitted to the control system 4. The control system 4 adjusts the working state of the cavitation generating unit 1, the charging unit 2, the flow regulating valve 9-2 in the overflow system 9 and the oil pump 10-6 in the fluid transmission system 10 in real time according to the above detection data to maintain the best treatment effect.Once the system is found to have excessive pressure, the overflow valve 9-1 is immediately opened to discharge part of the aviation kerosene in the oil pipeline 10-1 back to the oil tank 11 through the overflow pipeline 10-2 to prevent equipment damage caused by excessive pressure, thereby achieving fine management and optimization of the entire purification process.

Claims

1. A device for purifying microorganisms in aviation kerosene based on the principle of hydrodynamic cavitation, characterized in that: The device comprises: a cavitation generating unit (1), an air charging unit (2), an oil and gas recovery unit (3), a control system (4), an oil and water separation unit (5), an impurity and water filtering system (6), a microorganism filtering unit (7), a feedback sensor (8), an overflow system (9) and a fluid transmission system (10); wherein the fluid transmission system (10) comprises an oil delivery pipeline (10-1), an overflow pipeline (10-2), an exhaust pipeline (10-3), an oil discharge pipeline (10-4), an intake pipeline (10-5) and an oil delivery pump (10-6); the oil delivery pipeline The two ends of the overflow pipeline (10-2) are respectively connected to the middle of the oil delivery pipeline (10-1) and the oil tank (11); the two ends of the exhaust pipeline (10-3) are respectively connected to the exhaust port of the cavitation generating unit (1) and the inlet of the oil and gas recovery unit (3); the two ends of the oil discharge pipeline (10-4) are respectively connected to the oil discharge port of the cavitation generating unit (1) and the oil tank (11); the two ends of the air intake pipeline (10-5) are respectively connected to the air intake port and the filling port of the cavitation generating unit (1); The oil-water separation unit (5), the oil pump (10-6) and the impurity and moisture filtering system (6) are connected in sequence to a portion of the oil pipeline (10-1) located between the connection between the overflow pipeline (10-2) and the oil pipeline (10-1) and the oil tank (11), and the oil-water separation unit (5) is close to the oil tank (11); the overflow system (9) includes an overflow valve (9-1) and a flow regulating valve (9-2); the overflow valve (9-1) is installed on the overflow pipeline (10-2); the oil pipeline (10-1) and the air intake pipeline (10-5) are connected to each other. ) are each installed with a flow regulating valve (9-2); the feedback sensor (8) comprises a temperature sensor (8-1) and a pressure sensor (8-2); the oil delivery pipeline (10-1) and the oil discharge pipeline (10-4) are each installed with a temperature sensor (8-1); the oil delivery pipeline (10-1), the oil discharge pipeline (10-4) and the air intake pipeline (10-5) are each installed with a pressure sensor (8-2); the control system (4) is respectively electrically connected to the cavitation generating unit (1), the charging unit (2), the feedback sensor (8), the overflow system (9) and the oil delivery pump (10-6).

2. The device for purifying microorganisms in aviation kerosene based on the principle of hydrodynamic cavitation according to claim 1, characterized in that: The cavitation generating unit (1) comprises a shell (1-1) and a plurality of orifice plates (1-2) arranged in series and at intervals in a vertical direction inside the shell (1-1); an oil inlet and an air inlet are arranged at one end of the shell (1-1), and an air outlet and an oil discharge outlet are arranged at the other end; and a plurality of holes (1-3) are radially formed on each orifice plate (1-2).

3. The device for purifying microorganisms in aviation kerosene based on the principle of hydrodynamic cavitation according to claim 2, characterized in that: The spacing of the orifice plate (1-2) is 20 mm and the thickness is 1 mm; the longitudinal section of the hole (1-3) is an isosceles trapezoid, the aperture at the center is 4 mm, the center angle α=45°, and the small aperture is located on the oil inlet side.

4. The device for purifying microorganisms in aviation kerosene based on the principle of hydrodynamic cavitation according to claim 1, characterized in that: The inflation unit (2) adopts an air compressor.

5. The device for purifying microorganisms in aviation kerosene based on the principle of hydrodynamic cavitation according to claim 1, characterized in that: The oil and gas recovery unit (3) comprises an outer shell and a molecular sieve and a condenser arranged in the outer shell; the outer shell is provided with an inlet, a gas discharge port and a liquid discharge port.

6. The device for purifying microorganisms in aviation kerosene based on the principle of hydrodynamic cavitation according to claim 1, characterized in that: The control system (4) adopts Siemens S7-1200 series programmable logic controller.

7. The device for purifying microorganisms in aviation kerosene based on the principle of hydrodynamic cavitation according to claim 1, characterized in that: The oil-water separation unit (5) comprises a shell, a cyclone feed chamber arranged at the upper part of the shell, and a plurality of cyclone separators arranged at the lower part of the shell; a water outlet is arranged at the bottom of the cyclone separator, and an aviation kerosene outlet is arranged at the bottom of the shell; a liquid inlet pipe connected to the cyclone feed chamber is arranged along the tangential direction on the side of the shell; and a plurality of flow diversion ports are arranged on the cyclone feed chamber, respectively connected to the plurality of cyclone separators.

8. The device for purifying microorganisms in aviation kerosene based on the principle of hydrodynamic cavitation according to claim 1, characterized in that: The impurity and moisture filtering system (6) comprises a housing, a filter screen, a microporous filter membrane and an activated carbon filter element; an inlet and an outlet are respectively arranged at two ends of the housing; the filter screen, the microporous filter membrane and the activated carbon filter element are arranged inside the housing in sequence from the inlet to the outlet.

9. The device for purifying microorganisms in aviation kerosene based on the principle of hydrodynamic cavitation according to claim 1, characterized in that: The microbial filtration unit (7) comprises a housing and a multi-layer polytetrafluoroethylene filter membrane arranged in the housing.

10. The device for purifying microorganisms in aviation kerosene based on the principle of hydrodynamic cavitation according to claim 1, characterized in that: The models of the temperature sensor (8-1) and the pressure sensor (8-2) are PT100 and PT124G-210 respectively; the models of the overflow valve (9-1) and the flow control valve (9-2) are HG-06 and ZDLP-16C respectively; the oil delivery pipeline (10-1), the overflow pipeline (10-2), the exhaust pipeline (10-3), the oil discharge pipeline (10-4) and the air intake pipeline (10-5) are all high-pressure resistant pipelines.

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