Test control method and system based on aviation kerosene antistatic agent test platform

Abstract

The invention relates to the technical field of aviation fuel additive testing, and discloses a test control method and system based on an aviation fuel antistatic agent test platform, and the system comprises a stirring oil tank unit which is used for storing an original oil sample and an oil sample added with an antistatic agent, and is provided with a stirring motor and a temperature sensor; the receiving oil tank unit is used for receiving the test oil sample and configuring a liquid level transmitter, an electrostatic tester and a temperature sensor; the pipeline system is connected with the stirring oil tank and the receiving oil tank and comprises a refueling centrifugal pump, a circulating centrifugal pump, a liquid return centrifugal pump, a filter separator, a carclazyte filter and an electrostatic generator; the insulation protection module comprises a rubber-polytetrafluoroethylene insulation layer between the tank body and the skid-mounted part, a rubber hose between pipelines and an insulation flange; and the upper computer control system is used for automatically controlling the pump set, the valve and the electrostatic generator through configuration software, and collecting the data of the liquid level, the temperature and the electrostatic field intensity in real time. The problem of limitation in effect evaluation of the aviation kerosene antistatic agent is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of aviation fuel testing, and in particular to a test control method based on an aviation fuel antistatic agent test platform. Background Art

[0002] Jet fuel, short for aviation kerosene, is a fuel designed specifically for jet engines. Primarily used in aviation, it possesses specific physical and chemical properties. Its core function is to power aircraft while also meeting safety requirements such as combustion stability and low-temperature fluidity. No. 3 jet fuel is a typical type of jet fuel, complying with the GB6537-2018 standard. Its conductivity, density, and other properties are directly related to aviation safety, making it one of the primary energy sources for aviation.

[0003] Because No. 3 jet fuel is prone to static electricity accumulation due to friction during production, storage, and transportation, potentially causing explosions and other safety hazards, antistatic agents are added to increase conductivity and accelerate charge dissipation. Antistatic agent testing is conducted to determine the optimal addition ratio to ensure conductivity meets standards (50-500 pS / m), balancing safety and cost-effectiveness.

[0004] Currently, although there are some studies on antistatic agent testing for No. 3 jet fuel (aviation kerosene), these existing testing technologies have many problems.

[0005] Existing antistatic agent dosing systems (such as CN112624026A) can achieve closed-loop conductivity control, but lack a systematic testing solution for the entire jet fuel blending process (raw oil samples, dosing oil samples, and de-dosing oil samples). Furthermore, they fail to integrate dynamic static field monitoring with multi-stage process automation. Furthermore, while sealing oil filter element electrostatic protection testing systems (such as CN117330867A) involve electrostatic parameter detection, they are not adapted to the characteristics of jet fuel media and the requirements of the blending process, making them incapable of direct application to the multi-dimensional evaluation of the effectiveness of antistatic agent dosing.

[0006] The shortcomings of the existing technology are mainly reflected in: The testing process is simple: it only tests the conductivity after adding the additive, and lacks a full-process comparative test of the original oil sample, the additive-added oil sample (before and after filtration), and the additive-free oil sample; Incomplete static electricity monitoring: Failure to combine real-time monitoring of static electricity field intensity and dissipation time during the flow of jet fuel; Low system integration: Automated linkage control of stirring, dosing, filtration, electrostatic loading, and data acquisition is not achieved; Insufficient insulation protection: The multi-level insulation isolation scheme between the tank and the pipeline was not designed according to the requirements of aviation fuel testing, and was susceptible to static electricity interference from the equipment itself.

[0007] The present invention addresses the limitations of existing systems in evaluating the effects of aviation kerosene antistatic agents by constructing a full-process automated testing platform that integrates multi-stage testing processes, static electricity monitoring, and insulation protection technologies. Summary of the Invention

[0008] The present invention aims to provide a test control method based on a test platform for the charge release performance of aviation fuel antistatic agents, so as to solve the problem that it is difficult to comprehensively and accurately evaluate the static charge release effect of the antistatic agent during the actual aviation fuel transportation and filling process.

[0009] In order to solve the above problems, the present invention adopts the following technical solutions: Solution 1: Test control system based on the aviation fuel antistatic agent test platform, including: Stirring oil tank unit: used to store original oil samples and oil samples after adding antistatic agent, equipped with stirring motor and temperature sensor; Receiving oil tank unit: used to receive test oil samples and add antistatic agent, equipped with liquid level transmitter, static tester and temperature sensor; Pipeline system: connects the mixing oil tank and the receiving oil tank, including the refueling centrifugal pump, circulation centrifugal pump, liquid return centrifugal pump, as well as filter separator, clay filter and electrostatic generator; Insulation protection module: including the rubber-PTFE insulation layer between the tank body and the skid, the rubber hose between the pipelines and the insulation flange; Host computer control system: realizes automatic control of pump groups, valves and electrostatic generators through configuration software, and collects liquid level, temperature and electrostatic field strength data in real time.

[0010] Beneficial effects: Through full-process equipment integration and automated control, multi-stage testing of the effect of antistatic agent addition to aviation fuel is achieved, improving test efficiency and data accuracy.

[0011] Preferably, the pipeline system includes a test branch, a dosing branch, and a dedosing branch, each branch being switched by an electric valve; wherein: a test branch circuit, comprising a mixing oil tank and a receiving oil tank, and a second manual butterfly valve, a first lower circuit electric butterfly valve, a second Y-type filter, a lower circuit centrifugal pump, a lower circuit check valve, a first turbine flowmeter, a second lower circuit electric butterfly valve, a third lower circuit electric butterfly valve, a reducer, a second turbine flowmeter, an insulating flange, an electrostatic generator, a sampling valve, and an electrostatic tester connected in sequence between the mixing oil tank and the receiving oil tank; The dosing branch is a large loop formed by connecting the test branch and the upper loop; the upper loop also includes a first manual butterfly valve, a first upper loop electric butterfly valve, a first Y-type filter, an upper loop centrifugal pump, a pressure sensor, an upper loop check valve, and a second upper loop electric butterfly valve connected in sequence between the receiving oil tank and the mixing oil tank; The deagent branch is a large loop formed by connecting the upper loop and the lower loop; the lower loop includes a mixing oil tank and a receiving oil tank, and a second manual butterfly valve connected in sequence between the mixing oil tank and the receiving oil tank, a first lower loop electric butterfly valve, a second Y-type filter, a lower loop centrifugal pump, a lower loop check valve, a first turbine flowmeter, a fourth lower loop electric butterfly valve, a clay filter, a fifth lower loop electric butterfly valve, a sixth lower loop electric butterfly valve, a filter separator, a seventh lower loop electric butterfly valve, a reducer, a second turbine flowmeter, an insulating flange, an electrostatic generator, a sampling valve, and an electrostatic tester; The electric valves all adopt explosion-proof solenoid valves, and the switching of each branch is automatically executed by the PLC controller according to the preset program.

[0012] Beneficial effects: Supports phased testing of original oil samples, additive oil samples (before and after filtration), and additive-free oil samples, meeting the full-process evaluation requirements of the jet fuel blending process.

[0013] Preferably, the output voltage of the electrostatic generator is adjustable from 0 to 90 kV and has an automatic grounding and discharge function.

[0014] Beneficial effects: Simulate the electrostatic environment in the flow of jet fuel, realize the test of the effect of antistatic agents under different electrostatic field strengths, and improve the coverage of test conditions.

[0015] Preferably, the rubber-polytetrafluoroethylene insulation layer between the tank body and the skid is a double-layer insulation layer of 30mm rubber sheet-30mm polytetrafluoroethylene sheet; The inter-pipeline rubber hoses are two 300mm rubber hoses connecting the tanks; The plastic pipe clamps between the pipeline and the skid chassis are fixed by insulating flanges.

[0016] Beneficial effect: Block the transmission path of static electricity between devices, ensuring that test data is not interfered with by the device itself.

[0017] The advantages of this solution are: 1. Full process automation and multi-branch switching capabilities Electric valves are used to automatically switch between the three-stage test branches of original oil sample, additive oil sample (before and after filtration), and de-additive oil sample, covering the entire life cycle of jet fuel blending and solving the problem of fragmentation in existing technical processes.

[0018] The PLC controller presets a program to control valve movement, reducing manual intervention and improving test efficiency and accuracy (e.g., switching error ≤ 0.5 seconds).

[0019] 2. High-precision monitoring and dynamic simulation Multi-parameter synchronous acquisition: integrated electrostatic field detector, temperature sensor, pressure sensor, etc., to monitor the performance changes of antistatic agents at different stages in real time.

[0020] Dynamic electrostatic simulation: A 0-90kV adjustable electrostatic generator simulates the strong electrostatic environment of jet fuel flow. Combined with a high-precision electrostatic field detector (range 0-90kV / m, accuracy <1%), the charge dissipation ability of the antistatic agent is quantitatively evaluated.

[0021] 3. Multi-level insulation protection and safety design Double-layer insulation structure: The mixing oil tank and the receiving oil tank adopt "30mm rubber plate + 30mm polytetrafluoroethylene plate" double-layer insulation. 300mm rubber hose and insulating flange are installed between the pipelines to block the static leakage path. The test error is controlled within ±5%.

[0022] Explosion-proof safety configuration: All electric valves, pump groups, and sensors are explosion-proof, with integrated nitrogen protection system and double emergency stop protection, meeting the high safety standards of aviation fuel testing.

[0023] 4. Industrial-grade compatibility and data traceability Automation network integration: Supports OPC UA services and industrial control network Ethernet access, and can seamlessly connect to the D2S system to achieve remote monitoring and production data traceability.

[0024] Standardized testing process: Strictly adheres to GB6537-2018 standard parameters (such as flow rate, temperature, and pressure), and test results directly reflect the actual jet fuel blending process.

[0025] Solution 2: A test control method based on the aviation kerosene antistatic agent test platform, using any of the test control systems described above, includes the following steps: Step 1, charge release time test: Use an electrostatic generator to apply 30 kV static voltage, and record the static voltage and charge dissipation time of the receiving oil tank inlet pipe and the receiving oil tank body; Step 2, oil sample test with antistatic agent: After adding antistatic agent, test the static voltage and charge dissipation time of the oil sample containing antistatic agent; Step 3, oil sample test for removal of antistatic agent: filter through clay filter and filter separator to remove antistatic agent, and repeat the test process in step 1; Step 4, data comparison: Analyze the conductivity, static voltage and dissipation time of oil samples at different stages to optimize the amount of antistatic agent added.

[0026] Beneficial effect: Compared with the existing technology that does not involve the effect verification process after agent removal, the present invention accurately evaluates the dispersibility, filtration stability and long-term effectiveness of the antistatic agent in aviation kerosene through multi-stage comparative testing.

[0027] Preferably, in the dosing oil sample test described in step 2, when the pressure difference before and after the filter separator reaches the pressure difference setting value within the range of 0.15-0.2Mpa, the PLC controller automatically closes the current filter branch electric valve and opens the standby filter branch electric valve at the same time, so that the dosing oil sample is switched to the standby filter separator for testing; the pressure difference setting value is dynamically adjusted within the range of 0.15-0.2MPa according to the specifications and models of the filter separator and the characteristics of the aviation kerosene, and the pressure fluctuation of the test pipeline is kept ≤±0.02MPa during the switching process.

[0028] Beneficial effect: Ensure test continuity and avoid process interruption caused by filter blockage.

[0029] Preferably, the host computer control system generates an electrostatic voltage-time history curve and an electrostatic field intensity dissipation trend graph in real time.

[0030] Beneficial effects: Improve the traceability and analysis efficiency of test results through visual data-assisted analysis.

[0031] Preferably, the stirring oil tank and the receiving oil tank are connected through a nitrogen connecting pipe, and nitrogen replacement is performed before testing; the specific steps are as follows: Initial preparation: Close all valves connected to the atmosphere and open the nitrogen inlet and exhaust valves; First replacement: Inject nitrogen into the mixing oil tank through the nitrogen source. After the pressure reaches 0.1-0.15MPa, close the air inlet valve and let it stand for 5 minutes to allow the gas in the tank to mix evenly. Pressure relief and exhaust: Open the exhaust valve to reduce the pressure in the tank to 0.02-0.03MPa and discharge the mixed gas with high oxygen content; Circular replacement: Repeat the above steps of "intake-rest-exhaust" at least 3 times until the volume ratio of oxygen content in the mixing tank is less than or equal to 1%; Receiving tank replacement: Open the connecting valve between the mixing tank and the receiving tank, introduce nitrogen into the receiving tank through the pressure difference, and repeat the above replacement steps to ensure that the volume ratio of oxygen content in the receiving tank is also less than or equal to 1%; Sealed and pressure-maintaining: After the replacement is completed, close the exhaust valve and the connecting valve to maintain the nitrogen pressure in the tank within the range of 0.05-0.08MPa to form an inert gas protective atmosphere.

[0032] Beneficial effects: Remove air from the tank, reduce the risk of electrostatic discharge, and ensure test safety.

[0033] Preferably, after the test is completed, the oil sample from the receiving oil tank is pumped back to the stirring oil tank through the liquid return centrifugal pump until the liquid level in the receiving oil tank reaches the set low liquid level; the set low liquid level is 5%-10% of the height of the receiving oil tank, and is monitored in real time by the liquid level sensor. When the liquid level drops to the low liquid level range, the PLC controller automatically turns off the liquid return centrifugal pump and the corresponding valve, and triggers a low liquid level warning signal at the same time; the low liquid level range is dynamically adjusted within the range of 5%-10% according to the geometric dimensions of the receiving oil tank and the volume of the residual liquid at the bottom, ensuring that the volume of the residual oil sample is less than or equal to 5L to meet the cleanliness requirements of the next test.

[0034] Beneficial effects: Realize oil sample recycling, reduce waste and simplify processes.

[0035] Preferably, the host computer control system supports OPC UA services and industrial control network Ethernet access.

[0036] Beneficial effects: Compatible with industrial Internet of Things architecture, facilitating remote monitoring and data integration.

[0037] The advantages of this method are: 1. Closed-loop testing and multi-dimensional evaluation Three-stage comparative test: By comparing the performance of original oil samples, additive oil samples (before and after filtration), and de-additive oil samples, the effectiveness, filtration stability, and residual impact of the antistatic agent are comprehensively evaluated to avoid the one-sidedness of a single test.

[0038] Dynamic response analysis: When an electrostatic generator applies an electrostatic field of different intensities, the dynamic changes of conductivity, electrostatic field strength, and dissipation time are simultaneously monitored to reveal the response mechanism of the antistatic agent under real working conditions.

[0039] 2. Verification of removal effect and resource reuse Clay filtration verification: Through the de-agent oil sample test, the removal effect of the antistatic agent under extreme working conditions (such as clay adsorption) is verified, providing safety boundary data for the aviation fuel recovery process.

[0040] Residual risk assessment: Detect the residual conductivity value of the oil sample after removing the agent to ensure that it is below the safety threshold (such as ≤10pS / m) to avoid the impact of residual antistatic agent on subsequent processes.

[0041] 3. Data-driven quality control Full-process data archiving: KingView software records test data in real time, generates correlation curves such as electrostatic field strength-time, and supports historical data query and trend analysis.

[0042] Abnormal warning mechanism: Set the electrostatic field strength parameter threshold, the system automatically triggers the alarm and saves abnormal records to improve quality control efficiency.

[0043] The system of the present invention provides hardware support for the method: automated branch switching, high-precision sensor network and safety protection design, ensuring the reliability and repeatability of the test method.

[0044] The method of the present invention injects intelligent decision-making into the system: a closed-loop control algorithm and process optimization strategy based on test data maximizes the hardware performance of the system and forms a complete closed loop of "testing-analysis-optimization".

[0045] Through the innovative combination of system and method, the present invention solves the problems of incomplete process, unrealistic simulation, and inaccurate data in the existing aviation fuel antistatic agent testing, and provides a systematic solution for the safe blending and quality control of aviation fuel. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 This is a hydraulic principle diagram of the test platform for the charge release performance of the aviation fuel antistatic agent of the present invention.

[0047] Figure 2 For Figure 1 The test branch is marked in the schematic diagram.

[0048] Figure 3 For Figure 1 The schematic diagram of the dosing branch is marked in the figure.

[0049] Figure 4 For Figure 1 The schematic diagram of the deagent branch is marked in the figure.

[0050] Figure 5 This is a control interface diagram of the test control system in the present invention.

[0051] Figure 6 This is a diagram of the data query interface of the test control system in the present invention.

[0052] Figure 7 This is a voltage curve interface diagram of the test control system in the present invention.

[0053] The figure marks in the drawings of the specification include: explosion-proof solenoid valve 1, filling port 2, explosion-proof stirring motor 3, breathing valve 4, upper circuit check valve 5, pressure sensor 6, upper circuit centrifugal pump 7, first Y-type filter 8, first upper circuit electric butterfly valve 9, first manual butterfly valve 10, electrostatic tester 11, manual ball valve 12, electric ball valve 13, sampling valve 14, electrostatic generator 15, insulating flange 16, second turbine flowmeter 17, reducer 18, third lower circuit electric butterfly valve 19, filter separator 20, clay filter 21, first turbine flowmeter 22, lower circuit check valve 23, lower circuit centrifugal pump 24, second Y-type filter 25, second manual butterfly valve 26, magnetic flap level gauge 27. DETAILED DESCRIPTION

[0054] The following is further described in detail through specific implementation methods: The aviation kerosene antistatic agent test platform of the present invention is called the aviation kerosene antistatic agent charge release performance test platform. Its hydraulic principle diagram is shown in the attached figure. Figure 1 As shown, it includes two main lines, the upper main line from the stirring oil tank to the receiving oil pipe, which is connected to two BZBSF-25-1L explosion-proof solenoid valves 1 respectively set on the stirring oil tank and the receiving oil tank, a filling port 2 on the stirring oil tank, two explosion-proof stirring motors 3, an A112-GIO01-GIO1-PTEF breathing valve 4, a DN40 upper circuit check valve 5, an MPM489 [0-5MPa] 71E22B1C2iG pressure sensor 6, an FM15-E-4O-05-SS-El-N+C upper circuit centrifugal pump 7, a DN40 The first Y-type filter 8, two BdC810-40BdIb24-B05 upper circuit electric butterfly valves 9, and a DF810-40BdIIIb first manual butterfly valve 10; the main line below is connected from the receiving oil tank to the mixing oil tank, with two 620E electrostatic testers 11, two DN25 manual ball valves 12, two DN25 electric ball valves 13, a 3PC-Q11F-16P-GI sampling valve 14, a JC-120KV electrostatic generator 15, two DN40 insulating flanges 16, and an FM1 5-E-40-05-SS-El-N+C second turbine flowmeter 17, one 65*40II-Sch10S / 304 stainless steel reducer 18, six BdC810-65BdIb24-BO5 lower circuit electric butterfly valves 19, one clay filter 21, one filter separator 20, one FMl5-E-65-05-SS-El-N+C first turbine flowmeter 22, one DN65 lower circuit check valve 23, one IHW65-125I lower circuit centrifugal pump 24, one DN65 second Y-type filter 25, one DN65 second manual butterfly valve 26, and two UHF-1CDHP magnetic flap level gauges 27, respectively installed on the mixing tank and the receiving tank. It should be noted that, for the convenience of viewing the drawings, for multiple identical components, the reference numeral only indicates one of them, and the remaining identical components can be intuitively distinguished by shape.

[0055] The system of the present invention mainly consists of two parts: oil testing equipment and an operating table. The oil testing equipment mainly completes the circulation and testing of oil, and the operating table is used to control various actions of the testing equipment and collect test parameters, alarm information, etc.

[0056] like Figure 2As shown, the test branch of the present invention is a flow path from the stirring oil tank to the receiving oil tank, including a second manual butterfly valve 26, a first lower circuit electric butterfly valve, a second Y-type filter 25, a lower circuit centrifugal pump 24, a lower circuit check valve 23, a first turbine flowmeter 22, a second lower circuit electric butterfly valve, a third lower circuit electric butterfly valve 19, a reducer 18, a second turbine flowmeter 17, an insulating flange 16, an electrostatic generator 15, a sampling valve 14, and an electrostatic tester connected in sequence between the stirring oil tank and the receiving oil tank.

[0057] like Figure 3 As shown, the dosing branch of the present invention is a large loop formed by connecting the test branch and the upper loop. The dosing branch is a test branch that flows from the mixing tank to the receiving tank and an upper loop that flows from the receiving tank to the mixing tank. The dosing branch includes the mixing tank, a second manual butterfly valve 26 connected in sequence between the mixing tank and the receiving tank, a first lower loop electric butterfly valve, a second Y-type filter 25, a lower loop centrifugal pump 24, a lower loop check valve 23, a first turbine flowmeter 22, a second lower loop electric butterfly valve, a third lower loop electric butterfly valve 19, a reducer 18, a second turbine flowmeter 17, an insulating flange 16, an electrostatic generator 15, a sampling valve 14, and an electrostatic tester. The upper loop includes the receiving tank and the mixing tank, and a first manual butterfly valve 10, a first upper loop electric butterfly valve 9, a first Y-type filter 8, an upper loop centrifugal pump 7, a pressure sensor 6, an upper loop check valve 5, and a second upper loop electric butterfly valve connected in sequence between the receiving tank and the mixing tank.

[0058] like Figure 4 As shown, the deagent branch of the present invention is a large loop formed by connecting an upper loop and a lower loop; the lower loop includes a stirring oil tank and a receiving oil tank, and a second manual butterfly valve 26 connected in sequence between the stirring oil tank and the receiving oil tank, a first lower loop electric butterfly valve on this branch, a second Y-type filter 25, a lower loop centrifugal pump 24, a lower loop check valve 23, a first turbine flowmeter 22, a fourth lower loop electric butterfly valve, a clay filter 21, a fifth lower loop electric butterfly valve, a sixth lower loop electric butterfly valve, a filter separator 20, a seventh lower loop electric butterfly valve, a reducer 18, a second turbine flowmeter 17, an insulating flange 16, an electrostatic generator 15, a sampling valve 14, and an electrostatic tester; the upper loop includes a receiving oil tank and a first manual butterfly valve 10, a first upper loop electric butterfly valve 9, a first Y-type filter 8, an upper loop centrifugal pump 7, a pressure sensor 6, an upper loop check valve 5, and a second upper loop electric butterfly valve connected in sequence between the receiving oil tank and the stirring oil tank.

[0059] After a certain amount of oil is loaded into the oil testing equipment, the lower circuit centrifugal pump 24 pumps the oil from the mixing tank to the receiving tank. The oil then passes through the clay filter 21 and filter separator 20 in the main circuit before reaching the receiving tank. The two lower circuit electric butterfly valves (the second lower circuit electric butterfly valve and the third lower circuit butterfly valve 19) of the test branch are connected in parallel to the clay filter 21 and filter separator 20.

[0060] In the lower loop, there is an electrostatic generator 15 and an electrostatic tester in front of the receiving oil tank. The discharge test is carried out through the operating table to complete the test operation and data recording.

[0061] The operating console uses force-controlled programming to control the entire oil testing equipment. The host computer controls the start and stop of the centrifugal pump and the opening and closing of the electric butterfly valve. There are two operating modes: automatic and manual. Automatic mode allows for automated testing according to a pre-programmed procedure. Manual mode allows the operator to manually open and close valves to control oil flow and complete the test.

[0062] Add emergency stop device, and configure interlocking protection such as motor failure. When the equipment alarms, the whole equipment stops working, the software runs normally, and the alarm indication is given at the same time.

[0063] System Architecture Hardware composition: Mixing oil tank: volume 2m³, stainless steel, equipped with 3 filling ports for dosing, 3 speed-adjustable explosion-proof mixing motor, 3 magnetic flap level gauge (accuracy ±5mm) and temperature sensor; Receiving oil tank: The structure is the same as that of the stirring oil tank, equipped with a liquid level transmitter (4-20mA output); Piping system: Refueling centrifugal pump (not shown in the attached figure as an external mobile centrifugal pump): self-priming, flow rate 1m³ / h, used for refueling the original oil sample; Circulation centrifugal pump (lower circuit centrifugal pump 24): flow rate 30m³ / h, with frequency converter, used for test process drive; Liquid return centrifugal pump (upper loop centrifugal pump 7): flow rate 8m³ / h, used for oil sample recovery; Filter components: main and standby filter separators (design flow rate 48m³ / h, in compliance with GB / T21358-2008), clay filter (16 filter elements, maximum flow rate 600L / min); Static electricity generator: output 0-90KV adjustable, equipped with automatic grounding discharge device; Insulation protection: 30mm rubber sheet + 30mm polytetrafluoroethylene sheet is laid between the tank body and the skid, the pipeline flange adopts insulating flange, and the connecting hose is a 300mm rubber tube.

[0064] The design parameters of the piping system are shown in Table 1.

[0065] Table 1

[0066] Software composition: Host computer: Advantech industrial computer, equipped with Windows 7 system and KingView 9.5 software, collects data through Siemens PLC200smart, supports OPC UA and Ethernet communication; Control Logic: A motorized valve switches the test branch, and the PLC automatically switches the filter separator based on the differential pressure signal. The host computer displays real-time conductivity, liquid level, temperature, and electrostatic field strength (using a KLEINWACHTER EFM15 electrostatic field detector with a range of 0-90 kV / m). This invention utilizes existing external testing equipment to simultaneously measure and display conductivity.

[0067] The specific implementation process is as follows: Original oil sample test: Start the refueling centrifugal pump (not shown in the figure) and add the original oil sample to the mixing tank through the filling port 2. Start the nitrogen replacement. The nitrogen enters the receiving tank through the explosion-proof solenoid valve connected to the receiving tank, then enters the mixing tank through the pipeline, and exits from the nitrogen outlet through the explosion-proof solenoid valve 1 connected to the mixing tank. Select the “Original Oil Sample Test” mode and open Figure 2 The two lower circuit electric butterfly valves at the bottom of the test branch from the mixing tank to the receiving tank start the lower circuit centrifugal pump 24 to add a certain amount of fuel to the receiving tank. The oil sample is applied to the fuel through the electrostatic generator 15 with a voltage of 30KV; Real-time recording of the static voltage of the receiving tank inlet pipeline, the receiving tank body voltage and its charge dissipation time.

[0068] Additive oil sample test: like Figure 3 As shown, the antistatic agent is manually added through the filling port 2, and the explosion-proof stirring motor 3 is started to mix for 30 minutes; First, close the filter separator test branch and test the electrostatic parameters of the oil sample with agent; Recover the oil sample to the mixing tank and end the test.

[0069] Deagent oil sample test: like Figure 4 As shown, the lower circuit centrifugal pump 24 is started, and the oil sample flows through two white clay filters 21 and filter separator 20 to filter out the antistatic agent; Repeat the original oil sample test process and compare the changes in liquid level and electrostatic parameters.

[0070] During operation, the control system implements remote control testing according to the following steps: S1. Tank level check like Figure 5 As shown, the upper computer monitoring interface confirms that the liquid level of the receiving tank has reached the specified height; if the liquid level is insufficient, the refueling centrifugal pump automatically adds No. 3 jet fuel to the mixing tank until the liquid level reaches the specified height (safe operating height).

[0071] S2. Hydraulic component connection inspection The system automatically inspects the piping connection status of hydraulic components such as centrifugal pumps and clay filters, focusing on: Flange interface torque value (in accordance with ASME B16.5 standard) Integrity of quick-connect sealing rubber ring Deflection of metal hose (≤30°) S3. Check the connection of electrostatic device Verify whether the grounding protection circuit of the electrostatic generator is reliably connected, and measure the grounding resistance value with an insulation resistance meter to ensure that it is ≤4Ω; Check the contact resistance between the discharge contact and the test pipe (static loading section), which must be ≤0.1Ω; Confirm that the installation position of the electrostatic tester 11 probe complies with the provisions of GB / T 1885-2004.

[0072] S4. Valve status and leakage detection Check to make sure the valve connections are properly connected and whether there is any oil leakage.

[0073] Remotely check whether the switch status of each electric valve matches the preset process; The pipeline pressure fluctuation is monitored by the pressure sensor 6. If the pressure drops by more than 0.01MPa within 5 minutes, a leakage alarm is automatically triggered; Start the ultrasonic detector to detect leakage on the valve sealing surface, and set the sound pressure threshold to 20dB.

[0074] S5. Power on the device and start the program Power on the device: Press the "Power On" button on the console to power on the device. The system performs a three-level self-test: Level 1 Self-Test: Industrial Computer (Advantech IPC-610H) Hardware Initialization Secondary self-test: PLC controller (Siemens S7-1200) program loading Three-level self-test: zero point calibration of each sensor (±0.5% FS) Click the "Start" button on the host computer operation interface, the system enters the standby state, and the human-machine interface displays "READY".

[0075] S6. Software interface operation and abnormal alarm Remote control is implemented through the four functional interfaces of the upper computer KingView software: the system interface, operation interface, data query, and voltage curve interface. An alarm information bar is set under each interface so that alarms can be immediately viewed.

[0076] After the device starts up, click the Force Control shortcut (3) on the desktop and click Run. The software will enter the main system interface. This interface includes a hydraulic schematic, an "operation interface switch button," an "alarm query button," an "emergency stop button" (to stop the program in an emergency), and an "exit system button" (to close the program after operation). Also on the right are three automatic control buttons: Circulation, Filtration Separation, and Clay Filtration. These buttons represent the three paths through which the test fluid will be circulated, filtered through the filter separator, and filtered through the clay filter.

[0077] Click "Operation Interface" to enter Figure 5 The control interface shown.

[0078] The control interface includes five parts: manual control, automatic control, parameter display, electrostatic generator, and test operation.

[0079] Manual control: After switching the manual button to manual mode, the motor, fan and all valves can be turned on and off individually; Automatic control: After switching the manual and automatic buttons to the automatic state, click on the three cycle modes, and the system will cycle in the selected mode. Click on the operation stop button, and the cycle will stop immediately. Parameter display: Displays the real-time pressure and flow rate of the operation; Static electricity generator: controls the opening and closing of static electricity, records the start and end time and displays the static electricity voltage in real time; Test operation: First, click the test button, the system sets four test points, automatically pumps the oil from the storage tank to the receiving tank, and tests 1-4 are different liquid level heights.

[0080] Click the "Data Query" button on the operation interface to enter the data query interface. You can print the test results according to the test history records. The interface is as follows: Figure 6 shown.

[0081] Click the "Voltage Curve" button in the operation interface, and a pop-up window will appear. Figure 7 The voltage curve interface shown in the figure. The entire interface mainly shows the time when the voltage dissipates, and the curve records. You can also query, save, and export it according to the time. After querying, you can also click the "Manually capture the graph button" to save the entire interface screenshot to the / Desktop / Screenshots / folder; the specific voltage data will also be recorded and queried.

[0082] like Figure 7 As shown, the static voltage decay curve is displayed in real time (X axis: time, Y axis: voltage value), and the dissipation time (the time required to drop from the peak value to 33%) is automatically calculated.

[0083] Data export function: CSV format raw data (including 1000 sampling points); PNG format curve image (resolution 300DPI).

[0084] Manually capture graphics function: Click the "Manually capture graphics" button; The system automatically saves the screenshot to: C: / Desktop / Screenshots / Date_Time.png; Simultaneously record key parameters such as voltage value and dissipation time at the time of screenshot.

[0085] When the electrostatic discharge device is turned on, during manual or automatic testing, the oil level in the receiving tank will be displayed on the magnetic flap level gauge and the software. The discharge position of the electrostatic discharge device needs to be determined according to the liquid level to determine the discharge time. According to the corresponding American standard, the corresponding liquid level height is calculated as shown in Table 2 below: Table 2

[0086] When the liquid level reaches the height indicated by the level gauge, the electrostatic discharge device activates, discharging the oil. The discharge time and voltage are adjustable. During manual or automatic testing, the receiving tank level is monitored in real time (dual display via a magnetic flap level gauge and software). When the liquid level reaches the preset height, the electrostatic discharge device is manually activated. The discharge voltage (recommended value: 60kV) and discharge time are set on the touchscreen. After the discharge is complete, the system automatically records the discharge parameters and generates a log.

[0087] The advantages of the present invention are: Full process coverage: Supports systematic testing of original oil samples, additive oil samples (before and after filtration), and additive-free oil samples, meeting the multi-dimensional evaluation needs of the jet fuel blending process and filling the gap in existing technologies in verifying additive removal effects; Static electricity simulation: Through a 0-90kV adjustable static electricity generator and real-time monitoring of the static electricity field strength, the static electricity environment in the flow of jet fuel is accurately simulated, improving the authenticity of the test conditions; Upgraded insulation protection: Tank-skid double insulation, pipeline rubber hoses, and insulating flanges are used to effectively block static leakage paths and ensure the accuracy of test data (the insulation design of the reference document CN117330867A is more suitable for aviation fuel media); Automation and visualization: Through PLC and configuration software, process automation control and data visualization analysis are realized, reducing manual intervention, improving test efficiency and data traceability; Safety and compatibility: The system integrates nitrogen protection, explosion-proof motors, and dual emergency stop protection (hard and soft emergency stops), meeting the safety regulations for aviation fuel testing. It also supports industrial network access and adapts to the needs of smart factories.

[0088] Compared with the prior art, the present invention is non-obvious: 1. Technical implications and limitations of existing technologies CN112624026A discloses conductivity closed-loop control of antistatic agent addition, but only focuses on a single addition process and does not involve comparative testing before and after addition or verification of agent removal; CN117330867A involves electrostatic protection testing of sealing oil filter elements, but the test object is the filter element rather than the antistatic agent, and it does not integrate the filtration and stirring process steps in the jet fuel blending process; The existing technology does not disclose an automated testing system for the entire process of jet fuel blending (original oil sample → additive addition → filtration → additive removal), and in particular lacks the coordinated design of multi-branch switching, dynamic monitoring of electrostatic fields and insulation protection.

[0089] The technical breakthrough of the present invention: Problem-oriented system integration: To address the complexity of evaluating the effectiveness of antistatic agents in jet fuel blending, we creatively integrated stirring, dosing, filtration, static loading, and data acquisition into an automated testing platform, resolving the process fragmentation problem in existing technologies. Targeted insulation protection design: Based on the static electricity accumulation characteristics of aviation fuel, a multi-level insulation scheme for the tank and pipeline was designed to significantly improve test accuracy. This design is not disclosed in existing antistatic agent filling or filter element testing systems. Multi-parameter linkage analysis: By correlating multi-dimensional data such as conductivity, static voltage, dissipation time, and filtration pressure difference, a comprehensive evaluation of the antistatic agent's effectiveness is achieved, breaking through the limitation of existing technologies that rely solely on conductivity.

[0090] Unpredictability of beneficial effects: The present invention combines full-process testing with dynamic electrostatic monitoring to discover the loss pattern and long-term stability of antistatic agents during the filtration process, while existing technologies can only verify the immediate effect after adding the agent. The synergy between insulation protection technology and automated control reduces the test error to within ±5%, which is significantly better than existing systems (the comparison document does not mention the specific test accuracy). This effect cannot be derived by simply combining existing technologies.

[0091] Example 1: Antistatic agent addition verification test Test object: A batch of No. 3 jet fuel (original conductivity 0 pS / m) Antistatic agent model: Aviation fuel antistatic agent T1502 Additive concentration gradient: 0.1 ppm, 0.2 ppm, 5.0 ppm Test parameters: conductivity (E21 / E22), static dissipation time (E1), pressure difference before and after filtration (P1 / P2) Testing process: Original oil sample test: Start the refueling centrifugal pump to add the original oil sample into the mixing oil tank; The measured conductivity is 0 pS / m and the static dissipation time is >3.2 seconds (exceeding the safety threshold) Additive test: Add 0.1-5.0ppm antistatic agent respectively, stirring for 15 minutes after each addition The measured conductivity changes with concentration are shown in Table 3: Table 3

[0092] Effect: Optimal agent concentration: conductivity reaches the minimum conductivity required by GB6537-2018 (50 pS / m) Filtration stability: antistatic agent retention rate <7%, in line with filter element performance standards Example 2: Dynamic electrostatic response test Static electricity simulation: Static electricity generator 15 applies 10KV, 20KV, 30KV, 40KV static electricity field Test object: Oil sample with antistatic agent (conductivity 147 pS / m) Test parameters: electrostatic field strength attenuation curve, dissipation time Testing process: 10KV electrostatic field test: After applying static electricity, it takes 3.0 seconds for the field strength to decay from 10KV / m to 1KV / m 20KV electrostatic field test: It takes 4.0 seconds for the field strength to decay from 20KV / m to 1KV / m 30KV electrostatic field test: It takes 4.0 seconds for the field strength to decay from 30KV / m to 1KV / m 40KV electrostatic field test: It takes 3.0 seconds for the field strength to decay from 40KV / m to 1KV / m In the presence of antistatic agents, no static buildup occurred, demonstrating that antistatic agents remain effective under extreme conditions.

[0093] Effect: Safety threshold verification: When the fuel contains antistatic agent, the dissipation time is less than the dissipation time of the fuel without agent, proving that the antistatic agent has the ability to dissipate charge.

[0094] The above is only an embodiment of the present invention, and the common knowledge such as the specific technical solutions and / or characteristics in the solution are not described in detail here. It should be pointed out that for those skilled in the art, without departing from the technical solution of the present invention, several variations and improvements can be made, which should also be regarded as the scope of protection of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. The test control system based on the aviation kerosene antistatic agent test platform is characterized by: include: Stirring oil tank unit: used to store original oil samples and oil samples after adding antistatic agent, equipped with stirring motor and temperature sensor; Receiving oil tank unit: used to receive test oil samples and add antistatic agent, equipped with liquid level transmitter, static tester and temperature sensor; Pipeline system: connects the mixing oil tank and the receiving oil tank, including the refueling centrifugal pump, circulation centrifugal pump, liquid return centrifugal pump, as well as filter separator, clay filter and electrostatic generator; Insulation protection module: including the rubber-PTFE insulation layer between the tank body and the skid, the rubber hose between the pipelines and the insulation flange; Host computer control system: realizes automatic control of pump groups, valves and electrostatic generators through configuration software, and collects liquid level, temperature and electrostatic field strength data in real time.

2. The test control system based on the aviation kerosene antistatic agent test platform according to claim 1 is characterized in that: The pipeline system includes a test branch, a dosing branch, and a dedosing branch, each branch being switched by an electric valve; wherein: a test branch circuit, comprising a mixing oil tank and a receiving oil tank, and a second manual butterfly valve, a first lower circuit electric butterfly valve, a second Y-type filter, a lower circuit centrifugal pump, a lower circuit check valve, a first turbine flowmeter, a second lower circuit electric butterfly valve, a third lower circuit electric butterfly valve, a reducer, a second turbine flowmeter, an insulating flange, an electrostatic generator, a sampling valve, and an electrostatic tester connected in sequence between the mixing oil tank and the receiving oil tank; The dosing branch is a large loop formed by connecting the test branch and the upper loop; the upper loop also includes a first manual butterfly valve, a first upper loop electric butterfly valve, a first Y-type filter, an upper loop centrifugal pump, a pressure sensor, an upper loop check valve, and a second upper loop electric butterfly valve connected in sequence between the receiving oil tank and the mixing oil tank; The deagent branch is a large loop formed by connecting the upper loop and the lower loop; the lower loop includes a mixing oil tank and a receiving oil tank, and a second manual butterfly valve connected in sequence between the mixing oil tank and the receiving oil tank, a first lower loop electric butterfly valve, a second Y-type filter, a lower loop centrifugal pump, a lower loop check valve, a first turbine flowmeter, a fourth lower loop electric butterfly valve, a clay filter, a fifth lower loop electric butterfly valve, a sixth lower loop electric butterfly valve, a filter separator, a seventh lower loop electric butterfly valve, a reducer, a second turbine flowmeter, an insulating flange, an electrostatic generator, a sampling valve, and an electrostatic tester; The electric valves all adopt explosion-proof solenoid valves, and the switching of each branch is automatically executed by the PLC controller according to the preset program.

3. The test control system based on the aviation kerosene antistatic agent test platform according to claim 1 is characterized in that: The output voltage of the electrostatic generator is adjustable from 0 to 90 kV and has an automatic grounding and discharge function.

4. The test control system based on the aviation kerosene antistatic agent test platform according to claim 1 is characterized in that: The rubber-PTFE insulation layer between the tank body and the skid is a double-layer insulation layer of 30mm rubber sheet and 30mm PTFE sheet; The inter-pipeline rubber hoses are two 300mm rubber hoses connecting the tanks; The plastic pipe clamps between the pipeline and the skid chassis are fixed by insulating flanges.

5. The test control method based on the aviation kerosene antistatic agent test platform is characterized in that: The test control system according to any one of claims 1 to 4 comprises the following steps: Step 1, charge release time test: Use an electrostatic generator to apply 30 kV static voltage, and record the static voltage and charge dissipation time of the receiving oil tank inlet pipe and the receiving oil tank body; Step 2, oil sample test with agent: After adding antistatic agent, test the static voltage and charge dissipation time of the oil sample containing antistatic agent; Step 3, oil sample test for removal of antistatic agent: filter through clay filter and filter separator to remove antistatic agent, and repeat the test process in step 1; Step 4, data comparison: Analyze the conductivity, static voltage and dissipation time of oil samples at different stages to optimize the amount of antistatic agent added.

6. The test control method based on the aviation kerosene antistatic agent test platform according to claim 5 is characterized in that: In the dosing oil sample test described in step 2, when the pressure difference before and after the filter separator reaches the pressure difference setting value within the range of 0.15-0.2Mpa, the PLC controller automatically closes the current filter branch electric valve and opens the standby filter branch electric valve at the same time, so that the dosing oil sample is switched to the standby filter separator for testing; the pressure difference setting value is dynamically adjusted within the range of 0.15-0.2MPa according to the specifications and models of the filter separator and the characteristics of the aviation kerosene, and the pressure fluctuation of the test pipeline is kept ≤±0.02MPa during the switching process.

7. The test control method based on the aviation kerosene antistatic agent test platform according to claim 5, characterized in that: The host computer control system generates an electrostatic voltage-time history curve and an electrostatic field intensity dissipation trend diagram in real time.

8. The test control method based on the aviation kerosene antistatic agent test platform according to claim 5, characterized in that: The stirring oil tank and the receiving oil tank are connected through a nitrogen connecting pipe, and nitrogen replacement is performed before the test; the specific steps are as follows: Initial preparation: Close all valves connected to the atmosphere and open the nitrogen inlet and exhaust valves; First replacement: Inject nitrogen into the mixing oil tank through the nitrogen source. After the pressure reaches 0.1-0.15MPa, close the air inlet valve and let it stand for 5 minutes to allow the gas in the tank to mix evenly. Pressure relief and exhaust: Open the exhaust valve to reduce the pressure in the tank to 0.02-0.03MPa and discharge the mixed gas with high oxygen content; Circular replacement: Repeat the above "intake-rest-exhaust" steps at least 3 times until the volume ratio of oxygen content in the mixing tank is less than or equal to 1%; Receiving tank replacement: Open the connecting valve between the mixing tank and the receiving tank, introduce nitrogen into the receiving tank through the pressure difference, and repeat the above replacement steps to ensure that the volume ratio of oxygen content in the receiving tank is also less than or equal to 1%; Sealed and pressure-maintaining: After the replacement is completed, close the exhaust valve and the connecting valve to maintain the nitrogen pressure in the tank within the range of 0.05-0.08MPa to form an inert gas protective atmosphere.

9. The test control method based on the aviation kerosene antistatic agent test platform according to claim 5, characterized in that: After the test, the oil sample from the receiving tank is pumped back to the mixing tank through the liquid return centrifugal pump until the liquid level in the receiving tank reaches the set low liquid level; the set low liquid level is 5%-10% of the height of the receiving tank, and is monitored in real time by the liquid level sensor. When the liquid level drops to the low liquid level range, the PLC controller automatically closes the liquid return centrifugal pump and the corresponding valve, and triggers a low liquid level warning signal at the same time; the low liquid level range is dynamically adjusted within the range of 5%-10% according to the geometric dimensions of the receiving tank and the volume of the residual liquid at the bottom, ensuring that the volume of the residual oil sample is less than or equal to 5L to meet the cleanliness requirements of the next test.

10. The test control method based on the aviation kerosene antistatic agent test platform according to claim 5, characterized in that: The host computer control system supports OPC UA services and industrial control network Ethernet access.

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