Marine fuel oil blocking tendency tester with thermal aging function

Abstract

A marine fuel oil blocking tendency tester with a thermal aging function can provide reference for oil quality control through combination of an aging heating furnace, a metering gear pump, a blocking filter, a testing balance, an oil sample collecting cup, a heater, a pressure controller, a nitrogen pressurizing sensor, an oxygen content adjusting sensor and a main control actuator. The problems that all indexes of low-sulfur fuel oil meet the national standard range, but an oil separator is still blocked, and a self-cleaning filter is frequently flushed and blocked are solved, and new consideration indexes are provided for detection of blending, separation, filtration, temperature and viscosity control and the like of different fuel oil. The blocking tendency index of the marine fuel oil is determined according to the relationship between the condition change of the marine fuel oil in the aging heating furnace and the change of the amount of the oil sample flowing out of the blocking filter into the oil sample collection cup in unit time.

Description

Technical Field

[0001] The present invention relates to the technical field of fuel oil blockage tendency testing, in particular to a marine fuel oil blockage tendency tester with a thermal aging function, which can provide a reference for oil product quality control, is conducive to solving the problems that although all indicators of low-sulfur fuel oil meet the national standard range, there are still problems such as separator blockage and frequent flushing and blockage of self-cleaning filters, and provides new consideration indicators for the blending, separation and filtration of different fuel oils and the detection of temperature and viscosity control, etc. Background Art

[0002] Fuel oil, as a kind of refined oil, is the heavier residual product separated from crude oil after gasoline, kerosene and diesel oil in the petroleum processing process. As the power source of transportation, the quality of marine fuel oil must meet the requirements for use in marine internal combustion engines. Otherwise, it is likely to cause greater safety hazards, and no additives or chemical wastes that may endanger the safety of the ship or have an adverse impact on the mechanical operation performance, damage physical health, or increase air pollution should be added artificially. The current national standard for marine fuel oil, GB17411, is formulated with reference to the marine fuel oil standard ISO8217 of the International Organization for Standardization (ISO8217 is the marine fuel standard formulated by the International Organization for Standardization, which stipulates the quality requirements and test methods of marine fuel to ensure that marine engines can operate in a highly efficient and stable state. ISO is the abbreviation of International Standard Organization. GB17411 is the national standard for marine fuel oil). GB17411 is a mandatory national standard, and its main technical indicators include kinematic viscosity, sulfur content, hydrogen sulfide, flash point, water content, acid value, total sediment, etc. The inventor of the present invention found in actual work that although all indicators of the fuel oil meet the standards of ISO8217 and GB17411, it is still impossible to avoid failures such as separator blockage, frequent flushing and blockage of self-cleaning filters, seizure of the blocking couple of the high-pressure fuel pump of the diesel engine, and wear and failure of the injector needle valve. And the test of the blockage tendency index of marine fuel oil belongs to a technical blank. In view of this, the inventor of the present invention completed the present invention. Summary of the Invention

[0003] In view of the deficiencies in the existing marine fuel testing technology projects, the present invention provides a marine fuel oil blockage tendency tester with a thermal aging function. Through the combination of an aging heating furnace, a metering gear pump, a blockage filter, a test balance, an oil sample collection cup, a heater, a pressure controller, nitrogen pressurization, oxygen content adjustment, various sensors, and a main control actuator, it can provide a reference for oil product quality control, which is beneficial to solving the problems that although all the indicators of low-sulfur fuel meet the national standard range, there are still problems such as the blockage of the centrifugal separator and the frequent flushing and blockage of the self-cleaning filter, and providing new consideration indicators for the blending, separation, filtration, temperature, and viscosity control of different fuel oils. That is, the blockage tendency index of marine fuel oil is determined according to the relationship between the change in the condition of the marine fuel oil in the aging heating furnace and the change in the amount of oil sample flowing out of the blockage filter into the oil sample collection cup per unit time.

[0004] The technical solution of the present invention is as follows:

[0005] A marine fuel oil blockage tendency tester with a thermal aging function, characterized in that it includes an aging heating furnace for aging and heating marine fuel oil. A two-way two-position solenoid valve is provided on the top furnace cover of the aging heating furnace to adjust the oxygen content in the furnace. The two-way two-position solenoid valve is connected to the main control actuator through an automatic pressure controller. The pipeline extending downward from the bottom end of the aging heating furnace is connected to the input port of the metering gear pump through a filter screen. The output port of the metering gear pump is connected to an oil sample injection shower head located above the furnace liquid level through an upward extending circulation pipeline. The upper cavity in the aging heating furnace is provided with a nitrogen pressurization port connected to an external nitrogen source through a pressure controller. An oil sample pressing pipeline is arranged in the aging heating furnace. The bottom end of the oil sample pressing pipeline is located at the bottom end of the aging heating furnace. The upper end of the oil sample pressing pipeline extends horizontally out of the aging heating furnace above the furnace liquid level and then bends downward to connect to a blockage filter. Below the blockage filter is an oil sample collection cup placed on a test balance. A first heater is provided on the outer peripheral surface of the aging heating furnace. A second heater is provided on the horizontal section of the oil sample pressing pipeline outside the furnace. The blockage tendency index of marine fuel oil is determined according to the relationship between the change in the condition of the marine fuel oil in the aging heating furnace and the change in the amount of oil sample flowing out of the blockage filter into the oil sample collection cup per unit time.

[0006] A first pressure sensor is provided on the circulation pipeline. A second pressure sensor is provided on the horizontal section of the oil sample pressing pipeline outside the furnace. A metering gear pump sensor is provided on the metering gear pump. Temperature sensors are respectively provided on the first heater and the second heater. A balance weighing sensor is provided on the test balance. Each sensor is respectively connected to the main control actuator.

[0007] The master actuator is connected to the first heater through a first solid-state relay, the master actuator is connected to the second heater through a second solid-state relay, the master actuator is connected to an LED display screen through an ARM main board, and the ARM main board has a USB interface.

[0008] The circulation pipeline is a front pipeline with a small aperture, the oil sample pressing pipeline is a rear pipeline with a small aperture, and the furnace body of the aging heating furnace is in the form of a thick-walled cylindrical cone bottom and made of aluminum alloy.

[0009] The metering gear pump is connected to a capillary viscometer, and the dynamic viscosity of marine fuel oil is calculated by the following formula:

[0010]

[0011] Where Q is the flow rate, d is the aperture of the capillary of the viscometer, Δp is the pressure difference at both ends of the capillary of the viscometer, η is the dynamic viscosity of marine fuel oil, and L is the length of the capillary of the viscometer.

[0012] The conditions of the marine fuel oil include one or a combination of the following: the aging degree of marine fuel oil, the dynamic viscosity of marine fuel oil, the storage condition of marine fuel oil, the modulation condition of marine fuel oil, and the condition of flocs, oxides, and / or condensates generated during the use of marine fuel oil.

[0013] The technical effects of the present invention are as follows: A marine fuel oil blockage tendency tester with a thermal aging function according to the present invention is beneficial to prevent marine fuel oil that may have problems in actual use but has qualified surface indicators from entering the market. By conducting tests in advance, this oil product can be prevented from entering the ships of end customers, reducing the safety liability accidents caused by main engine failures due to fuel quality in ships, or reducing the losses caused thereby. Description of the Drawings

[0014] Figure 1 is a schematic structural diagram of a marine fuel oil blockage tendency tester with a thermal aging function for implementing the present invention.

[0015] Figure 2 is Figure 1 a schematic diagram of the control principle of Figure 2It includes a main control actuator, which is respectively connected to a first solid-state relay, a first temperature sensor PT100, a second solid-state relay, a second temperature sensor PT100, a first pressure sensor P1, a metering gear pump MP, a second pressure sensor P2, a balance weighing sensor Pg and an automatic pressure controller. The automatic pressure controller is connected to a two-way two-position solenoid valve. The first solid-state relay and the first temperature sensor PT100 are respectively connected to a first heater, and the second solid-state relay and the second temperature sensor PT100 are respectively connected to a second heater. The main control actuator is connected to an ARM main board, and the ARM main board is respectively connected to an LED display screen and a USB.

[0016] Explanation of reference numerals is as follows: A - aging heating furnace; F - tail valve; G1 - filter screen; G2 - block filter; P - pressure controller (controls the pressure in the aging heating furnace by inputting nitrogen); P1 - first pressure sensor; P2 - second pressure sensor; Pm - metering gear pump (connected to a drive motor, the drive motor is connected to a power supply, and the drive motor drives the metering gear pump to circulate the marine fuel oil at the bottom of the aging heating furnace to the upper part of the aging heating furnace through the filter screen); PQ - throttle valve; Pt100 - temperature sensor (Pt100 is actually a platinum thermal resistance, whose resistance value changes with temperature, Pt means platinum, and 100 after Pt indicates that the resistance value is 100 ohms at 0°C); Q2202 - two-way two-position solenoid valve or two-position two-way solenoid valve (ages the marine fuel oil by inputting air into the aging heating furnace, and its control end is connected to the main control actuator through an automatic pressure controller U / i); R11 - first heater; R12 - second heater; T - test balance (on which an oil sample collection cup is placed). ARM - Advanced RISC Machine; USB - Universal Serial Bus; 220VAC - 220 volts alternating current; DC - direct current; LED - light-emitting diode; MP - metering gear pump sensor; Pg - balance weighing sensor. Detailed implementation manners

[0017] The following combines the accompanying drawings ( Figures 1 - 2 ) and embodiments to describe the present invention.

[0018] Figure 1 is a schematic structural diagram of a marine fuel oil block tendency tester with a thermal aging function for implementing the present invention. Figure 2 is Figure 1 the schematic control principle diagram of. Refer to Figures 1 to 2As shown in the figure, a marine fuel oil blockage tendency tester with a thermal aging function includes an aging heating furnace A for aging and heating marine fuel oil. A two-way two-position solenoid valve Q2202 is provided on the top furnace cover of the aging heating furnace A to adjust the oxygen content in the furnace (by inputting air into the aging heating furnace to age the marine fuel oil, that is, utilizing the oxygen element in the air). The two-way two-position solenoid valve Q2202 is connected to the main control actuator through an automatic pressure controller. The pipeline extending downward from the bottom end of the aging heating furnace A is connected to the input port of a metering gear pump Pm through a filter screen G1. The output port of the metering gear pump Pm is connected to an oil sample injection shower head located above the liquid level line in the furnace through an upward-extending circulation pipeline. A nitrogen gas pressurization port connected to an external nitrogen gas source through a pressure controller P is provided in the upper cavity inside the aging heating furnace A (to stabilize or adjust and control the pressure in the furnace by filling nitrogen gas). An oil sample discharge pipeline is provided inside the aging heating furnace A. The bottom end of the oil sample discharge pipeline is located at the bottom end of the aging heating furnace A. The upper end of the oil sample discharge pipeline extends horizontally out of the aging heating furnace A above the liquid level line in the furnace and then bends downward to be connected to a blockage filter G2. Below the blockage filter G2 is an oil sample collection cup placed on a test balance T. A first heater R11 is provided on the outer peripheral surface of the aging heating furnace A. A second heater R12 is provided on the horizontal section of the oil sample discharge pipeline outside the furnace. The blockage tendency index of the marine fuel oil is determined based on the relationship between the change in the condition of the marine fuel oil in the aging heating furnace A and the change in the amount of oil sample flowing out of the blockage filter G2 into the oil sample collection cup per unit time. A first pressure sensor P1 is provided on the circulation pipeline. A second pressure sensor P2 is provided on the horizontal section of the oil sample discharge pipeline outside the furnace. A metering gear pump sensor MP is provided on the metering gear pump Pm. Temperature sensors Pt100 are respectively provided on the first heater R11 and the second heater R12. A balance weighing sensor Pg is provided on the test balance T. Each sensor is respectively connected to the main control actuator.

[0019] The main control actuator is connected to the first heater R11 through a first solid-state relay. The main control actuator is connected to the second heater R12 through a second solid-state relay. The main control actuator is connected to an LED display screen through an ARM main board. The ARM main board has a USB interface. The circulation pipeline is a small-diameter front pipeline. The oil sample discharge pipeline is a small-diameter rear pipeline. The furnace body of the aging heating furnace A is in the form of a thick-walled cylindrical cone bottom and is made of aluminum alloy. The metering gear pump Pm is connected to a capillary viscometer, and the dynamic viscosity of the marine fuel oil is calculated by the following formula:

[0020]

[0021] Where Q is the flow rate, d is the aperture of the slender hole of the viscometer, Δp is the pressure difference across the two ends of the slender hole of the viscometer, η is the dynamic viscosity of the marine fuel oil, and L is the length of the pore channel of the slender hole of the viscometer.

[0022] The conditions of the marine fuel oil include one or a combination of the following: the degree of aging of the marine fuel oil, the dynamic viscosity of the marine fuel oil, the storage condition of the marine fuel oil, the modulation condition of the marine fuel oil, and the condition of floccules, oxides, and / or condensates generated during the use of the marine fuel oil.

[0023] The present invention provides a tester for the clogging tendency of marine fuel oil with thermal aging, which uses a test method simulating the fuel supply mode of a marine engine to test the clogging tendency of marine fuel oil. It is mainly used to evaluate the generation of floccules, oxides, and condensates in marine fuel oil during storage, modulation, and use, and the tendency of the fuel supply of the marine engine to be blocked.

[0024] The viscosity-temperature test judges the influence of the viscosity stability of the oil product on the viscosity stability by the viscosity-temperature change rate in a certain range of the marine fuel oil at the set viscosity value and conveying temperature control.

[0025] To achieve the above object, the technical solution of the present invention is: a tester for the clogging tendency of marine fuel oil with thermal aging. The oil sample clogging tendency test is that the oil sample ages or generates floccules during storage and modulation, causing the filter screen to clog. When the oil sample is heated to the specified viscosity value, it is filtered at a certain flow rate. Taking the filtration pressure below 105 Kpa and all passing through as the boundary, the FBT value range is 1 to 1.414; or when the filtration pressure is higher than 105 kpa and the oil sample filtration amount is 0 to 300 g, the FBT value range is 1.414 to 100. FBT is the clogging tendency index or the clogging tendency index of marine fuel oil. The larger the FBT value, the more serious the clogging tendency of the marine fuel oil.

[0026] Further, inject more than 350 g of the oil sample into the aging heating bath, start the heater controlled by the temperature controller, and make the oil sample reach the test temperature or viscosity (such as 120 °C, 20 cst, cst is the kinematic viscosity unit centistokes).

[0027] Further, cover the lid of the aging heating bath, start the metering gear pump, and convey the oil sample to the small-aperture viscometer through the pipeline at a constant flow rate. Measure the pressure P1 of the oil sample in the pipeline before the small aperture and the pipeline pressure P2 after the small aperture. After the pressures P1 and P2 (P2 = 0) are stable, detect the real-time dynamic viscosity of the oil sample.

[0028] Furthermore, the metering gear pump continues to operate, fully stirring the oil sample to make it homogeneous. The automatic pressure controller is started, and the pressure in the inner cavity of the aging heating bath is maintained stable. P2 presses the oil sample into the pipeline and into the block filter. After passing through the block filter, the oil sample flows into the sample cup, which is placed on the weighing sensor. The flow rate of the oil sample at each time and the flow rate relative to the filtered oil sample can be calculated based on the amount of oil sample flowing out per unit time. The relevant curve graph is drawn by the ARM computer system and displayed on the touch screen display.

[0029] Furthermore, according to the data of the block tendency change curve, when the block filtration flow rate is less than a certain value (FBT) under the condition of the block tendency reporting pressure P2, an alarm is given.

[0030] The beneficial effects of the present invention are as follows: The ship fuel oil block tendency tester adopts a mode of simulating the ship fuel supply unit to detect the tendency of the marine fuel oil to cause blockage of the filter screen due to aging or formation of substances during storage and use.

[0031] When the oil sample is heated to the specified viscosity value, it is filtered at a certain flow rate. Taking the filtration pressure below 105 Kpa and all passing as the boundary, the FBT value range is 1 - 1.414; or when the filtration pressure is higher than 105 kpa and the oil sample filtration amount is 0 - 100 g, the FBT value range is 1.414 - 100 (refer to the design scheme); FBT is the block tendency index.

[0032] The FBT value of the oil sample and the K value of the viscosity - temperature curve (the K value is the rheological value) can be used to evaluate the quality of the oil sample according to different data requirements.

[0033] In summary, a marine fuel oil block tendency tester with thermal aging according to the present invention realizes the programmed automatic control of the test process based on the operation principle of the ship fuel supply unit by using modern computer control technology and sensor technology, completes the automatic testing of viscosity, pressure, flow rate, and time, as well as the automatic control of temperature, pressure, and flow rate, and establishes a test method.

[0034] The marine fuel oil block tendency tester with thermal aging is used in the detection of marine fuel oil, preventing fuel oil with seemingly qualified quality indicators but actually having potential problems in actual use from entering the market. By conducting tests in advance, this kind of oil product is prevented from entering the ships of end - customers, reducing the safety liability accidents caused by main engine failures due to fuel oil quality on ships, or reducing the losses caused thereby.

[0035] Such as Figure 1As shown in the figure, a marine fuel oil block tendency tester with thermal aging of the present invention includes a housing, a touch display, an ARM embedded computer system, a control actuator, a metering gear pump, a small-aperture viscosity tester, a pressure sensor, an automatic pressure controller, a weighing sensor, an aging heating bath, a block filter, a heater, a temperature controller, and a temperature sensor.

[0036] As Figure 2 shown in the figure, a control architecture - ARM embedded computer system of a marine fuel oil block tendency tester with thermal aging of the present invention: uses control software to execute operation instructions, completes the output of specified operation program instructions, collects information of the control sensor system, stores and outputs test results.

[0037] Metering gear pump: pumps out a fixed amount of oil sample under constant rotational speed conditions, meeting the parameter requirements for viscosity testing.

[0038] Small-aperture viscosity detector: at 120 °C, the oil sample flows through a small hole at a constant flow rate, generating pressure, and the viscosity of the oil sample can be obtained through formula conversion.

[0039] Pressure sensor: tests the pressure of the oil sample during transportation.

[0040] Automatic pressure controller: provides a constant pressure for the output of the oil sample.

[0041] Weighing sensor: weighs the oil sample flowing out of the block filterability.

[0042] Aging heating bath: warms and stores the oil sample, and transports it to the block filter and small-aperture viscosity tester through pipelines. Adopts a thick-walled cylindrical cone-bottom form, made of aluminum alloy. The heater is an embedded ultra-fine heating tube, which is embedded and assembled with the aluminum alloy heating cylinder to improve the heat transfer efficiency. The temperature of the heating cylinder is detected and sensed by a pt100 thermal resistance. The temperature controller accepts the pt100 signal according to the temperature set in the test. When the temperature of the heating cylinder is close to or equal to the test set temperature, through the adjustment of PID parameters, it outputs a control signal to make the output power of the heater stable and maintain the constant control of the temperature.

[0043] Block filter: uses a 1000-mesh, 13-mm-diameter stainless steel disposable filter screen to filter block particles.

[0044] Heater: heats the aging heating and pipelines.

[0045] Temperature controller: controls the operation of the heater to make the temperatures of the aging heating bath and pipelines reach the test requirements.

[0046] Temperature sensor: measures the temperature signal value of the aging heating bath and pipelines and transmits it to the temperature controller.

[0047] The main test process is as follows:

[0048] Constant temperature of the oil sample: Under the control of the thermostat, the temperature of the constant temperature oil tank is kept constant to ensure that the test temperature of each test oil sample is consistent (the test conditions are the same).

[0049] Viscosity of the oil sample: Under the test temperature conditions of the oil sample, the gear metering pump pumps the oil sample into the slender hole viscometer. The pressure difference of the oil sample at both ends of the aperture is detected at a specified flow rate. Through the formula the corresponding dynamic viscosity is calculated, where Q - flow rate; d - pipe diameter; Δp - pressure difference at both ends of the aperture; η - dynamic viscosity of the oil product; L - length of the pore channel.

[0050] Control of the test pressure: Stable nitrogen is injected into the sealed constant temperature oil tank through the digital pressure controller and maintained relatively stable to provide a stable oil supply pressure for the filtration pipeline and drive the oil sample through the filter.

[0051] Filtration: The filter uses a stainless steel 304 material, with a diameter of 13 mm and a filtration accuracy of 1000 mesh (13 μm) filtration equipment.

[0052] Flow rate (filtration) measurement: The filtered oil sample flows into the oil sample collection bottle under the drive of the oil supply pressure. The weighing sensor continuously measures the outflow volume within a specified unit time period to obtain the flow rate at different times.

[0053] A marine fuel oil clogging tendency tester with a thermal aging function is an automated tester composed of a microcomputer, a temperature control device, an oil sample aging heating bath, a viscometer, a pressure control sensing device, an automatic weighing (flow rate) device, etc. It establishes curves of "pressure - flow rate" and "temperature - viscosity", as well as models of pressure values, flow rate values, temperature values, and evaluation values. The test for the clogging tendency of marine fuel oil adopts a test method that simulates the oil supply mode of marine engines. It is mainly used to evaluate the tendency of marine fuel oil to produce flocs, oxides, and condensates during storage, modulation, and use, resulting in a clogging tendency in the oil supply of marine engines.

[0054] A marine fuel oil clogging tendency tester with thermal aging consists of a housing, a touch - type display, an ARM embedded computer system, a control actuator, a metering gear pump, a small - aperture viscosity tester, a pressure sensor, an automatic pressure controller, a weighing sensor, an aging heating bath, a clogging filter, a heater, a temperature controller, and a temperature sensor. As Figure 1 shown.

[0055] ARM embedded computer system: Executes operation instructions using control software, completes the output of specified operation program instructions, collects information from the control sensor system, stores, and outputs test results.

[0056] Control actuator: Receives instructions from the ARM computer and controls the working states of each execution component.

[0057] Metering gear pump: Under the condition of a constant rotation speed, pumps out a fixed amount of oil sample to meet the parameter requirements for viscosity testing.

[0058] Small-aperture viscosity detector: At 120 °C, the oil sample flows through a small hole at a constant flow rate, generating pressure, and the viscosity of the oil sample can be obtained through formula conversion.

[0059] Pressure sensor: Tests the pressure of the oil sample during transportation.

[0060] Automatic pressure controller: Provides a constant pressure for the output of the oil sample.

[0061] Weighing sensor: Weighs the oil sample flowing out through the blocking filterability.

[0062] Aging heating bath: Heats and stores the oil sample, and transports it to the blocking filter and small-aperture viscosity tester through pipelines. It adopts a thick-walled cylindrical cone-bottom form, made of aluminum alloy. The heater is equipped with an embedded ultra-fine heating tube, which is embedded and assembled with the aluminum alloy heating cylinder to improve the heat transfer efficiency. The temperature of the heating cylinder is detected by a pt100 thermal resistor sensor. The temperature controller receives the pt100 signal according to the temperature set in the test. When the temperature of the heating cylinder is close to or equal to the test-set temperature, through the adjustment of PID parameters (PID, Proportional, Integral, Derivative), it outputs a control signal to make the output power of the heater stable and maintain the constant control of the temperature.

[0063] Blocking filter: Adopts a 1000-mesh, 13-mm-diameter stainless steel disposable filter screen to filter blocking particles, which is the main test component.

[0064] Heater: Heats the aging heating and pipelines.

[0065] Temperature controller: Controls the operation of the heater to make the temperatures of the aging heating bath and pipelines reach the test requirements.

[0066] Temperature sensor: Measures the temperature signal values of the aging heating bath and pipelines and transmits them to the temperature controller.

[0067] The test steps are as follows:

[0068] (1) Inject more than 300 g of oil sample into the aging heating bath, start the heater controlled by the temperature controller, and let the oil sample reach the test temperature (such as 120 °C) and stand for aging.

[0069] (2) Cover the lid of the aging heating bath, start the metering gear pump, and deliver the oil sample to the small-aperture viscometer through the pipeline at a constant flow rate. Measure the oil sample pressure P1 in the pipeline before the small aperture and the pipeline pressure P2 after the small aperture. After the pressures P1 and P2 (P2 = 0) are stable, calculate the real-time dynamic viscosity of the oil sample.

[0070] (3) The metering gear pump continues to work, fully stir the oil sample to make it homogeneous, start the automatic pressure controller, keep the pressure in the inner cavity of the aging heating bath stable, and press the oil sample into the pipeline by p2 and enter the block filter. After passing through the block filter, the oil sample flows into the sample cup. The sample cup is placed on the weighing sensor, and the flow rate of the oil sample and the flow rate relative to the filtered oil sample can be calculated through the amount of oil sample flowing out per unit time. The ARM computer system draws the relevant curve graph and displays it on the touch screen.

[0071] (4) According to the data of the block tendency change curve, when the block filtration flow rate is less than a certain value (FBT) under the condition of the block tendency reporting pressure P2, give an alarm.

[0072] Computer control is as follows:

[0073] Adopt the ARM series embedded system to control all operations of the instrument. Such as Figure 2 shown (instrument control architecture diagram)

[0074] 1. Control the temperature of the thermal aging heating bath and the constant temperature waiting time.

[0075] 2. Operation of the viscosity metering gear pump.

[0076] 3. Pressure signal input by the pressure sensor in the viscosity pipeline.

[0077] 4. Test pressure control of the filtration pipeline.

[0078] 5. Pressure signal input by the pressure sensor in the filtration pipeline.

[0079] 6. Flow rate and weight of the oil sample flowing out after filtration.

[0080] 7. Calculate the test viscosity value of the oil sample.

[0081] 8. Calculate the block tendency level value of the oil sample (default).

[0082] 9. Draw the pressure, flow rate, and filtration weight curve graph of the oil sample filtration block test.

[0083] 10. Store and output the test data.

[0084] The content not described in detail in the specification of the present invention belongs to the prior art well-known to those skilled in the art. It is hereby specified that the above description helps those skilled in the art to understand the present invention, but does not limit the protection scope of the present invention. Any implementation that makes equivalent replacements, modifies and improves, and / or simplifies the above description without departing from the substantial content of the present invention falls within the protection scope of the present invention.

Claims

1. A marine fuel oil blocking tendency tester with thermal aging function, characterized in that: The invention comprises an aging heating furnace for aging and heating marine fuel oil, wherein a two-position two-way solenoid valve is arranged on the top furnace cover of the aging heating furnace to adjust the oxygen content in the furnace, the two-position two-way solenoid valve is connected to a main control actuator through an automatic pressure controller, a pipeline extending downward from the bottom end of the aging heating furnace is connected to an input port of a metering gear pump through a filter screen, an output port of the metering gear pump is connected to an oil sample injection shower head located above a liquid level line in the furnace through an upwardly extending circulation pipeline, a nitrogen charging port connected to an external nitrogen source through a pressure controller is arranged in the upper cavity in the aging heating furnace, and an oil sample extrusion pipe is arranged in the aging heating furnace. The bottom end of the oil sample extrusion pipe is located at the bottom end of the aging heating furnace, the upper end of the oil sample extrusion pipe extends horizontally from above the liquid level line in the furnace out of the aging heating furnace and then turns downward to connect with a blocking filter, below the blocking filter is an oil sample collection cup placed on a test balance, a first heater is arranged on the outer peripheral surface of the aging heating furnace, and a second heater is arranged on the transverse section outside the furnace of the oil sample extrusion pipe, and the blocking tendency index of the marine fuel oil is determined according to the relationship between the condition change of the marine fuel oil in the aging heating furnace and the change of the amount of oil sample flowing out of the blocking filter into the oil sample collection cup per unit time.

2. The marine fuel oil blocking tendency tester with thermal aging function according to claim 1 is characterized in that: A first pressure sensor is arranged on the circulation pipeline, a second pressure sensor is arranged on the transverse section outside the furnace of the oil sample extrusion pipeline, a metering gear pump sensor is arranged on the metering gear pump, the first heater and the second heater are respectively provided with their own temperature sensors, and a balance weighing sensor is arranged on the test balance, and each sensor is respectively connected to the main control actuator.

3. The marine fuel oil blocking tendency tester with heat aging function according to claim 1 is characterized in that: The master actuator is connected to the first heater via a first solid-state relay, the master actuator is connected to the second heater via a second solid-state relay, the master actuator is connected to the LED display screen via an ARM motherboard, and the ARM motherboard has a USB interface.

4. The marine fuel oil blocking tendency tester with heat aging function according to claim 1 is characterized in that: The circulation pipeline is a small-diameter front pipeline, the oil sample extrusion pipeline is a small-diameter rear pipeline, and the furnace body of the aging heating furnace is a thick-walled cylindrical cone-bottom form and is made of aluminum alloy.

5. The marine fuel oil blocking tendency tester with thermal aging function according to claim 1 is characterized in that: The metering gear pump is connected to a slender hole viscometer, and the dynamic viscosity of the marine fuel oil is calculated by the following formula: Where Q is the flow rate, d is the aperture of the viscometer's elongated hole, Δp is the pressure difference across the viscometer's elongated hole, η is the dynamic viscosity of marine fuel oil, and L is the length of the viscometer's elongated hole.

6. The marine fuel oil blocking tendency tester with heat aging function according to claim 1, characterized in that: The condition of the marine fuel oil includes one or a combination of the following: the aging degree of the marine fuel oil, the dynamic viscosity of the marine fuel oil, the storage condition of the marine fuel oil, the modulation condition of the marine fuel oil, and the condition of floccules, oxides and / or coagulants generated during the use of the marine fuel oil.

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