Online oil pretreatment system and method

Abstract

The embodiment of the invention discloses an online oil pretreatment system and method. The system comprises an online monitoring module, a monitoring pool, an auxiliary monitoring module, a pump source, a constant temperature device and a control module, the oil liquid is discharged into and out of the monitoring pool by the pump source; the auxiliary monitoring module monitors environmental parameters of the monitoring pool; the control module controls the thermostat according to the environmental parameters; the constant temperature device is used for heating the monitoring pool and keeping constant temperature at least; the on-line monitoring module is used for carrying out on-line monitoring on the oil liquid in the monitoring pool and outputting a monitoring result. According to the technical scheme provided by the embodiment of the invention, a laboratory pretreatment environment taking the monitoring pool as a core is realized, and indexes such as moisture, viscosity, density, dielectric constant and cleanliness are monitored under the conditions of constant temperature and complete elimination of influence of bubbles, flow velocity and the like; the influence of factors such as bubbles, temperature and flow on monitoring of moisture, viscosity, density, dielectric constant and cleanliness indexes is eliminated, and the accuracy and reliability of online monitoring are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of oil product pretreatment, and particularly to an on-line oil product pretreatment system and method. Background Art

[0002] Oil detection methods are divided into off-line detection and on-line monitoring. At present, on-line oil monitoring technology for monitoring indicators such as oil cleanliness, moisture, viscosity, density, and dielectric constant is achieved through single on-line oil monitoring sensors. The single on-line oil monitoring sensors require a laboratory environment or set applicable boundary conditions to achieve the expected performance. In recent years, multi-parameter on-line oil monitoring systems integrating multiple single on-line oil monitoring sensors have been gradually introduced on the market to achieve real-time monitoring of multi-parameter oil product indicators, but the working boundary conditions applicable to the integration of single on-line oil monitoring sensors in the multi-parameter oil monitoring system have not been considered.

[0003] By simply integrating single on-line oil monitoring sensors into a multi-parameter oil monitoring system, generally, it can only ensure reliable monitoring results under the condition of a good monitoring environment in the industrial field. A good monitoring environment depends on the sum of the applicable boundary conditions of each single sensor. For monitoring indicators such as oil cleanliness, moisture, viscosity, density, and dielectric constant, environmental conditions such as stable pressure, constant flow rate, no bubbles in the liquid, and constant temperature need to be provided. However, the monitoring environment in the actual industrial field is not optimistic. The detection environments that can be provided by each industrial field are different and limited. Relying on simple sensor integration equipment for complex working conditions, the reliability of its detection results will bring great difficulties and challenges, and the use value brought to customers is not high, resulting in a decrease in customer expectations and satisfaction. Summary of the Invention

[0004] The present invention provides an on-line oil product pretreatment system and method to solve the problems of inaccurate and unreliable monitoring results of on-line oil product monitoring in the industrial field monitoring environment.

[0005] The present invention provides an on-line oil product pretreatment system, including: an on-line monitoring module, a monitoring pool, an auxiliary monitoring module, a pump source, a constant temperature device, and a control module;

[0006] The pump source is used to discharge the oil into the monitoring pool and discharge the oil in the monitoring pool;

[0007] The auxiliary monitoring module is used to monitor the environmental parameters of the monitoring pool;

[0008] The control module is used to control the constant temperature device according to the environmental parameters;

[0009] The constant temperature device is used to heat the monitoring pool and / or maintain a constant temperature according to the control of the control module;

[0010] The on-line monitoring module is used to on-line monitor the oil in the monitoring pool and output the monitoring results.

[0011] Optionally, the on-line monitoring module includes an on-line cleanliness monitoring sensor, an on-line moisture monitoring sensor, and an on-line viscosity monitoring sensor;

[0012] The on-line cleanliness monitoring sensor is arranged at the liquid outlet of the monitoring pool, and is used to monitor the cleanliness of the oil in the monitoring pool;

[0013] The on-line moisture monitoring sensor is placed in the monitoring pool, and is used to monitor the moisture content of the oil in the monitoring pool;

[0014] The on-line viscosity monitoring sensor is placed in the monitoring pool, and is used to monitor the viscosity, density and dielectric constant of the oil in the monitoring pool.

[0015] Optionally, the auxiliary monitoring module includes a liquid level sensor and a liquid level protection unit;

[0016] The liquid level sensor is placed in the monitoring pool, and is used to detect the liquid level of the oil in the monitoring pool;

[0017] The liquid level protection unit is placed in the monitoring pool, and is used to control the pump source to stop discharging oil into the monitoring pool when the liquid level in the monitoring pool reaches a preset liquid level value.

[0018] Optionally, the auxiliary monitoring module includes a temperature sensor, which is placed in the monitoring pool and is used to detect the temperature of the oil in the monitoring pool; the control module is used to control the constant temperature device to maintain a constant temperature when the temperature of the oil in the monitoring pool reaches a preset temperature.

[0019] Optionally, there is a vent above the monitoring pool. The control module controls the constant temperature device to heat the monitoring pool, and the bubbles in the oil in the monitoring pool are discharged through the vent.

[0020] Optionally, a flow meter is further included, and the flow meter is used to monitor the flow rate of the oil flowing out of the monitoring pool;

[0021] The control module adjusts the rotation speed of the pump source according to the flow rate of the oil to control the oil in the monitoring pool to be discharged at a constant flow rate.

[0022] Optionally, the pump source includes a first pump source and a second pump source. The first pump source is used to discharge the oil into the monitoring pool; the second pump source is used to discharge the oil in the monitoring pool.

[0023] Optionally, the on-line oil pretreatment system further includes: a filter, a pressure sensor, a pressure reducing valve, a check valve, an inlet pipeline and an outlet pipeline;

[0024] The inlet pipeline is communicated with the inlet of the monitoring pool, and the outlet pipeline is communicated with the outlet of the monitoring pool; the filter, the pressure sensor, the pressure reducing valve and the first pump source are sequentially arranged on the inlet pipeline, and the filter is used to filter the wear particles in the oil; the pressure sensor is used to detect the pressure of the inlet pipeline; the pressure reducing valve is used to adjust the pressure of the inlet pipeline; a flow meter, an on-line cleanliness monitoring sensor, the second pump source and the check valve are sequentially arranged on the outlet pipeline, and the check valve is used to control the oil discharge and prevent the oil from flowing back.

[0025] According to another aspect of the present invention, there is also provided an on-line oil pretreatment method, which is applied to the on-line oil pretreatment system described in any embodiment of the present invention. The method includes:

[0026] The control module controls the pump source to discharge the oil into the monitoring pool;

[0027] The control module controls the constant temperature device according to the environmental parameters to heat the monitoring pool and keep it at a constant temperature;

[0028] The on-line monitoring module conducts on-line monitoring on the oil in the monitoring pool and outputs the monitoring results.

[0029] Optionally, after conducting on-line monitoring on the oil in the monitoring pool and outputting the monitoring results, it further includes:

[0030] If the water content of the oil exceeds the limit, the control module controls the pump source to empty the oil in the monitoring pool and starts the constant temperature device to heat.

[0031] In the technical solution of the embodiment of the present invention, through the collaborative work of the auxiliary monitoring module, the pump source, the constant temperature device, and the control module, the timed liquid discharge and liquid injection of the pump source can prevent the aging or pollution of the oil liquid in the pool. The auxiliary monitoring module monitors the environmental parameters, and the control module controls the constant temperature device according to the environmental parameters. The constant temperature device ensures the stable temperature of the monitoring pool by heating or maintaining a constant temperature, avoiding the sensor reading drift caused by temperature fluctuations. By controlling the flow rate of the pump source through the control module, it is ensured that the oil liquid is discharged from the monitoring pool at a constant flow rate, eliminating the influence of unstable flow rate or flow rate outside the monitoring range on the sensor, resulting in inaccurate or unreliable data. The technical solution of the embodiment of the present invention realizes a laboratory pretreatment environment with the monitoring pool as the core, and monitors indicators such as moisture, viscosity, density, dielectric constant, and cleanliness under constant temperature and completely eliminating the influence of bubbles, flow rate, etc., eliminating the influence of factors such as bubbles, temperature, and flow rate on the monitoring of moisture, viscosity, density, dielectric constant, and cleanliness indicators, and improving the accuracy and reliability of on-line monitoring.

[0032] It should be understood that the content described in this part is not intended to identify the key or important features of the embodiments of the present invention, nor is it used to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description.

[0033] It should be understood that the content described in this part is not intended to identify the key or important features of the embodiments of the present invention, nor is it used to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0035] Figure 1 It is a schematic structural diagram of an on-line oil product pretreatment system provided by an embodiment of the present invention;

[0036] Figure 2 It is a schematic structural diagram of another on-line oil product pretreatment system provided by an embodiment of the present invention;

[0037] Figure 3 It is a schematic structural diagram of yet another on-line oil product pretreatment system provided by an embodiment of the present invention;

[0038] Figure 4 It is a flowchart of an on-line oil product pretreatment method provided by an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0039] To enable those skilled in the art to better understand the solution of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0040] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily need to be used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances, so that the embodiments of the present invention described here can be implemented in an order other than those illustrated or described here. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0041] The oil fluid detection method is divided into offline detection and online monitoring. Offline detection is carried out using more precise equipment in the laboratory. Usually, the reasons why laboratory detection equipment can detect samples more accurately are that in addition to the relatively high accuracy of the equipment, firstly, the stable and suitable detection environment in the laboratory is more suitable for the operation of the detection equipment, and secondly, there are sample pretreatment work and processes before detection to ensure the stability of the detection data of the laboratory detection equipment; based on this, when the online monitoring sensor detects the on-site working conditions, it is also necessary to provide a suitable monitoring environment for the online monitoring equipment and preprocess the samples to be monitored, and then collect the detection data of the sensor to ensure the reliability and stability of the monitoring results.

[0042] Figure 1 is a schematic structural diagram of an online oil product pretreatment system provided by an embodiment of the present invention. This embodiment is applicable to situations such as online monitoring of oil fluids that require high accuracy, and can be configured in fields such as petrochemical industry, energy equipment testing, and environmental engineering. As Figure 1 shown, the system includes: an online monitoring module 101, a monitoring pool 102, an auxiliary monitoring module 103, a pump source 104, a constant temperature device 105, and a control module 106;

[0043] The pump source 104 is used to drain the oil fluid into the monitoring pool 102 and drain the oil fluid in the monitoring pool 102;

[0044] The auxiliary monitoring module 103 is used to monitor the environmental parameters of the monitoring pool 102;

[0045] The control module 106 is used to control the constant temperature device 105 according to the environmental parameters;

[0046] The constant temperature device 105 is used to heat the monitoring pool 102 and / or maintain a constant temperature according to the control of the control module 106;

[0047] The on-line monitoring module 101 is used to on-line monitor the oil fluid in the monitoring pool 102 and output the monitoring results.

[0048] Among them, the pump source 104 can be used as the power source for the inlet and outlet of the oil fluid, ensuring that new samples are periodically and continuously replaced in the monitoring pool 102 for monitoring. The monitoring pool 102 can be used as the core implementation component, and auxiliary monitoring sensors such as temperature sensors, liquid level sensors, and the constant temperature device 105 are configured around it, which can provide a simulated laboratory environment for the pretreatment method for the monitoring pool 102. The environmental parameters can be parameters such as temperature and liquid level. The control module 106 can judge whether it meets the preset conditions according to the environmental parameters, send a control signal to the constant temperature device 105, and control the constant temperature device 105 to reach and maintain the target environmental parameters. The constant temperature device 105 has the functions of heating and constant temperature. Under the control of the control module 106, the constant temperature device 105 can heat the monitoring pool 102 to make the temperature of the oil fluid in the monitoring pool 102 reach the preset temperature under the laboratory environment. By heating, the bubbles in the liquid can be discharged, eliminating the influence of the bubbles on the sensors. When the temperature reaches the preset value, control the constant temperature device 105 to keep the temperature of the oil fluid in the monitoring pool 102 constant. The on-line monitoring module 101 can include the monitoring of the cleanliness, moisture, viscosity, density, and dielectric constant of the oil product. Sensors can be used to detect the oil fluid in the monitoring pool 102 to obtain the indicators of the cleanliness, moisture, viscosity, density, and dielectric constant of the oil product.

[0049] Specifically, the pump source 104 extracts the oil fluid from the inlet to the monitoring pool 102, and controls the pump source 104 to stop after the liquid level reaches the set parameter; the control module 106 can control the constant temperature device 105 and simultaneously monitor the temperature, so that the temperature of the liquid in the monitoring pool can be kept constant at 40 °C. Under the defoaming and constant temperature environment of the monitoring pool 102, the on-line monitoring module 101 can detect the moisture, viscosity, density, and dielectric constant of the oil product to obtain the indicators of the moisture, viscosity, density, and dielectric constant of the oil product. The control module starts the pump source 104 to discharge the oil fluid in the monitoring pool 102, and can obtain the flow value and adjust the rotation speed of the pump source 104 to control the liquid in the monitoring pool 102 to be discharged at a constant flow rate. At this time, the on-line monitoring module 101 conducts the cleanliness detection of the oil product to obtain the cleanliness index of the oil product.

[0050] The technical solution of the embodiment of the present invention, through the collaborative work of the auxiliary monitoring module, the pump source, the constant temperature device and the control module, the timed liquid discharge and injection of the pump source can prevent the oil in the pool from aging or being polluted. The auxiliary monitoring module monitors the environmental parameters, and the control module controls the constant temperature device according to the environmental parameters. The constant temperature device ensures the stable temperature of the monitoring pool by heating or maintaining a constant temperature. On the one hand, it can discharge bubbles, and on the other hand, it can avoid the sensor reading drift caused by temperature fluctuations. By controlling the flow rate of the pump source by the control module, it is ensured that the oil is discharged from the monitoring pool at a constant flow rate, eliminating the influence of unstable flow rate or flow rate outside the monitoring range on the sensor, resulting in inaccurate or unreliable data. The technical solution of the embodiment of the present invention realizes a laboratory pretreatment environment with the monitoring pool as the core, and monitors indicators such as moisture, viscosity, density, dielectric constant and cleanliness under constant temperature and complete elimination of the influence of bubbles, flow rate, etc., eliminating the influence of factors such as bubbles, temperature, and flow rate on the monitoring of moisture, viscosity, density, dielectric constant and cleanliness indicators, improving the accuracy and reliability of on-line monitoring.

[0051] Figure 2 FIG. 4 is a schematic structural diagram of another on-line oil product pretreatment system provided by the embodiment of the present invention. In some alternative embodiments of the present invention, as Figure 2 shown, the on-line monitoring module 101 includes an on-line cleanliness monitoring sensor 1011, an on-line moisture monitoring sensor 1012, and an on-line viscosity monitoring sensor 1013;

[0052] The on-line cleanliness monitoring sensor 1011 is arranged at the liquid outlet of the monitoring pool 102, and the on-line cleanliness monitoring sensor 1011 is used to monitor the cleanliness of the oil product in the monitoring pool 102;

[0053] The on-line moisture monitoring sensor 1012 is placed in the monitoring pool 102, and the on-line moisture monitoring sensor 1012 is used to monitor the moisture content of the oil product in the monitoring pool 102;

[0054] The on-line viscosity monitoring sensor 1013 is placed in the monitoring pool 102, and the on-line viscosity monitoring sensor 1013 is used to monitor the viscosity, density and dielectric constant of the oil product in the monitoring pool 102.

[0055] Among them, the on-line cleanliness monitoring sensor 1011 can detect the quantity, size and distribution of suspended particles in the oil product in real time, and evaluate the cleanliness grade of the oil product. The on-line moisture monitoring sensor 1012 can measure the water content in the oil product in real time. The on-line viscosity monitoring sensor 1013 measures the viscosity, density and dielectric constant of the oil product in real time, reflecting the fluidity, lubricity and aging degree of the oil product.

[0056] In some alternative embodiments of the present invention, continue to refer to Figure 2 , the auxiliary monitoring module 103 includes a liquid level sensor 1031 and a liquid level protection unit 1032;

[0057] The liquid level sensor 1031 is placed in the monitoring pool 102, and the liquid level sensor 1031 is used to detect the liquid level of the oil in the monitoring pool 102;

[0058] The liquid level protection unit 1032 is placed in the monitoring pool 102. When the liquid level in the monitoring pool 102 reaches the preset liquid level value, the liquid level protection unit 1032 controls the pump source 104 to stop discharging oil into the monitoring pool 102.

[0059] Among them, when the liquid level sensor 1031 is placed in the monitoring pool 102, its main function is to detect the liquid level of the oil and transmit the liquid level information to the control module 106, so that the control module 106 controls the pump source 104 to stop discharging oil into the monitoring pool 102. The liquid level protection unit 1032 can monitor the liquid level in the monitoring pool 102 when the liquid level sensor 1031 cannot work properly, and when the liquid level reaches the preset value, the control module 106 controls the pump source 104 to stop discharging oil into the monitoring pool 102. It can prevent the liquid from overflowing due to the abnormal liquid level exceeding the set liquid level value after the liquid enters.

[0060] In some alternative embodiments of the present invention, continue to refer to Figure 2 , the auxiliary monitoring module 103 includes a temperature sensor 1033. The temperature sensor 1033 is placed in the monitoring pool 102 and is used to detect the temperature of the oil in the monitoring pool 102; when the temperature of the oil in the monitoring pool 102 reaches the preset temperature, the control module 106 controls the constant temperature device 105 to maintain a constant temperature.

[0061] Among them, the temperature sensor 1033 can measure the temperature of the oil in the monitoring pool 102 and transmit the measured temperature data to the control module 106. The control module 106 receives the temperature data from the temperature sensor 1033, compares the current temperature with the preset temperature. When the current temperature is less than the preset temperature, the control module 106 controls the constant temperature device 105 to heat the oil in the monitoring pool 102. When the temperature of the oil in the monitoring pool 102 reaches the preset temperature value, the control module 106 controls the constant temperature device 105 to maintain a constant temperature. For example, the preset temperature can be 40 °C. The constant temperature device 105 heats the oil in the monitoring pool and keeps the temperature constant at 40 °C. Among them, the viscosity index of the lubricating oil refers to the viscosity at 40 °C. By heating the oil in the monitoring pool, the bubbles in the liquid can be discharged, thereby eliminating the influence of the bubbles on the measurement accuracy of the sensor. By maintaining the temperature constant at 40 °C for viscosity monitoring, the deviation of converting the viscosity at different temperatures to the viscosity at 40 °C for calculation can be eliminated.

[0062] In some alternative embodiments of the present invention, continue to refer to Figure 2, there is a vent 1021 above the monitoring pool 102. The control module 106 controls the temperature control device 105 to heat the monitoring pool 102, and the bubbles in the oil in the monitoring pool 102 are discharged through the vent 1021.

[0063] Among them, the vent 1021 can discharge the bubbles and gas in the monitoring pool 102. The control module 106 controls the temperature control device 105 to heat the oil in the monitoring pool 102. At this time, the bubbles in the oil can be discharged through the vent 1021 to prevent the pressure from increasing due to gas accumulation or affecting the normal flow of the oil. The vent 1021 can also help balance the pressure inside and outside the monitoring pool 102.

[0064] Figure 3 is a schematic structural diagram of another online oil pretreatment system provided by an embodiment of the present invention. In some optional embodiments of the present invention, such as Figure 3 shown, it further includes a flow meter 13. The flow meter 13 is used to monitor the flow rate of the oil flowing out of the monitoring pool 6;

[0065] The control module adjusts the rotation speed of the pump source according to the flow rate of the oil to control the oil in the monitoring pool 6 to be discharged at a constant flow rate.

[0066] Among them, the pump source is controlled to discharge the oil in the monitoring pool 6. The flow meter 13 can monitor the flow rate of the oil in real time and transmit the flow rate data to the control module. The control module receives the flow rate data transmitted by the flow meter 13 and judges whether the current flow rate meets the preset constant flow rate value. The oil in the monitoring pool 6 can be discharged at a constant flow rate by adjusting the rotation speed of the pump source. Under the constant flow rate, the online cleanliness monitoring sensor 14 performs the oil cleanliness detection. It avoids being affected by unstable flow rate or flow rate outside the monitoring range, and improves the accuracy and reliability of the detection data.

[0067] In some optional embodiments of the present invention, continue to refer to Figure 3 , the pump source includes a first pump source 4 and a second pump source 15. The first pump source 4 is used to discharge the oil into the monitoring pool 6; the second pump source 15 is used to discharge the oil in the monitoring pool 6.

[0068] In some optional embodiments of the present invention, the online oil pretreatment system further includes: a filter 1, a pressure sensor 2, a pressure reducing valve 3, a check valve 16, a liquid inlet pipeline 17 and a liquid outlet pipeline 18;

[0069] The liquid inlet pipeline 17 is connected to the liquid inlet of the monitoring pool 6, and the liquid outlet pipeline 18 is connected to the liquid outlet of the monitoring pool 6; the filter 1, the pressure sensor 2, the pressure reducing valve 3, and the first pump source 4 are sequentially arranged on the liquid inlet pipeline 17. The filter 1 is used to filter the wear particles in the oil; the pressure sensor 2 is used to detect the pressure of the liquid inlet pipeline 17; the pressure reducing valve 3 is used to adjust the pressure of the liquid inlet pipeline 17; the flow meter 13, the on-line cleanliness monitoring sensor 14, the second pump source 15, and the one-way valve 16 are sequentially arranged on the liquid outlet pipeline 18. The one-way valve 16 is used to control the liquid outlet of the oil and prevent the oil from flowing backward.

[0070] Among them, the environments of each industrial site are different and harsh. In order to ensure a wider applicability of the monitoring system, a system protection device and program are added to the entire system to prevent the monitoring system from being damaged by itself after exceeding the boundary conditions. The filter 1 is arranged in the liquid inlet pipeline 17 to prevent the wear particles in the oil extracted from the industrial site and avoid blocking the liquid inlet pipeline 17. The pressure sensor 2 can detect the pressure of the liquid inlet pipeline 17. The pressure reducing valve 3 is arranged behind the pressure sensor 2 to prevent the pressure of the liquid inlet pipeline 17 from exceeding the boundary conditions and avoid damaging the internal components. The one-way valve 16 can prevent the oil from flowing backward when controlling the liquid outlet of the oil. Among them, the constant temperature device 5, the temperature sensor 7, the liquid level sensor 8, the ventilation port 9, the liquid level protection unit 10, the on-line viscosity monitoring sensor 11, and the on-line moisture monitoring sensor 12 have been explained in the above embodiments. The working principle of the embodiment of the present invention: Refer to Figure 3, the control module controls the first pump source 4 to transmit oil through the liquid inlet pipeline 17, filters the wear particles in the oil through the filter 1, and detects the pressure of the liquid inlet pipeline 17 through the pressure sensor 2. When the pressure is too high, it enters the monitoring pool 6 after decompression through the pressure reducing valve 3. When the liquid level is monitored by the liquid level sensor 8 and reaches the set parameter, the first pump source 4 is controlled to stop. The control module controls the constant temperature device 5 to heat the oil in the monitoring pool 6, discharges the bubbles in the oil through the vent 9, and monitors the temperature through the temperature sensor 7. When the temperature reaches the preset temperature, the constant temperature device 5 is controlled to keep the oil in the monitoring pool 6 at a constant temperature. The on-line viscosity monitoring sensor 11 and the on-line moisture monitoring sensor 12 are used for detection, and the on-line moisture, viscosity, density and dielectric constant are monitored under the defoaming and constant temperature environment to obtain the oil moisture, viscosity, density and dielectric constant indexes. The control module starts the second pump source 15, simultaneously collects the value of the flow meter 13, and synchronously adjusts the rotation speed of the second pump source 15 to ensure that the liquid in the monitoring pool 6 is discharged by the flow meter 13 at a constant flow rate, so as to eliminate the inaccurate or unreliable data caused by the unstable flow rate or the flow rate not within the monitoring range of the on-line cleanliness monitoring sensor 14. The on-line cleanliness monitoring sensor 14 is used for detection to obtain the oil cleanliness index. Through the above sequential control, data acquisition and processing, the environment construction of the laboratory pretreatment method is realized, and after the construction, the indexes such as moisture, viscosity, density, dielectric constant and cleanliness are monitored to eliminate the hidden danger that affects the accuracy and reliability of the monitoring results due to the influence of the monitoring environment.

[0071] Due to the variability and harshness of the industrial field environment in the technical solution of the embodiment of the present invention, but the sensor monitoring environment of the system itself remains unchanged, the applicable working conditions environment is more extensive, and the system installation difficulty and commissioning time are reduced. By setting protection devices in the system, such as filters, pressure sensors, pressure reducing valves and check valves, the on-line oil pretreatment system can take measures to prevent itself from being damaged in the harsh industrial field, ensure the reliability of the normal operation of the whole system, thereby reducing unnecessary losses of customers and reducing the maintenance cost of equipment.

[0072] Figure 4 is a flowchart of an on-line oil pretreatment method provided by an embodiment of the present invention, which is applied to the on-line oil pretreatment system of any embodiment of the present invention. Refer to Figure 2 and Figure 4 , the method includes:

[0073] S201. The control module 106 controls the pump source 104 to discharge the oil into the monitoring pool 102;

[0074] Among them, the control module can control the pump source to extract oil from the liquid inlet to the monitoring pool 102, and monitor the liquid level and control the pump source 104 to stop after reaching the set parameter.

[0075] S202. The control module 106 controls the constant temperature device 105 according to the environmental parameters to heat the monitoring pool 102 and maintain a constant temperature.

[0076] Among them, by controlling the constant temperature device 105 and simultaneously monitoring the temperature, the control module 106 can keep the temperature of the liquid in the monitoring pool 102 constant at 40°C. By heating, the bubbles in the liquid can be discharged, eliminating the influence of the bubbles on the sensor. The temperature is kept constant at 40°C for the monitoring of viscosity, density, and dielectric constant, eliminating the deviation when converting to viscosity, density, and dielectric constant at 40°C at different temperatures.

[0077] S203. The on-line monitoring module 102 performs on-line monitoring on the oil liquid in the monitoring pool 102 and outputs the monitoring results.

[0078] Among them, in the defoaming and constant temperature environment of the monitoring pool 102, the on-line moisture monitoring sensor 1012 and the on-line viscosity monitoring sensor 1013 perform detections to obtain the moisture, viscosity, density, and dielectric constant indexes of the oil liquid. The control module 106 starts the pump source, simultaneously collects the value of the flowmeter, and synchronously adjusts the rotation speed of the pump source to ensure that the liquid in the monitoring pool 102 is discharged by the flowmeter at a constant flow rate. The on-line cleanliness monitoring sensor 1011 performs detections to obtain the oil liquid cleanliness index, which can eliminate the influence of the on-line cleanliness monitoring sensor 1011 caused by unstable flow rate or out of the flow rate monitoring range, improving the accuracy and reliability of the data.

[0079] The technical solution of the embodiment of the present invention controls the constant temperature device according to the environmental parameters by the control module, heats the monitoring pool and maintains a constant temperature, and monitors indexes such as moisture, viscosity, density, dielectric constant, and cleanliness under the condition of constant temperature and complete elimination of the influence of bubbles, flow rate, etc. By starting the pump source by the control module and synchronously adjusting the rotation speed of the pump source to ensure that the liquid in the monitoring pool is discharged by the flowmeter at a constant flow rate, the on-line cleanliness monitoring sensor performs detections to obtain the oil liquid cleanliness index, which can eliminate the influence of the on-line cleanliness monitoring sensor caused by unstable flow rate or out of the flow rate monitoring range. The technical solution of the embodiment of the present invention eliminates the influence of factors such as bubbles, temperature, and flow rate on the monitoring of moisture, viscosity, density, dielectric constant, and cleanliness indexes, improving the accuracy and reliability of the data.

[0080] In some alternative embodiments of the present invention, referring to Figure 2 , after performing on-line monitoring on the oil liquid in the monitoring pool and outputting the monitoring results, it further includes:

[0081] If the moisture content of the oil liquid exceeds the limit, the control module 106 controls the pump source to empty the oil liquid in the monitoring pool 102 and starts the constant temperature device 105 for heating.

[0082] Among them, the on-line moisture monitoring sensor 1012 can monitor that the liquid moisture content exceeds the limit. If the oil moisture content exceeds the limit, the control module 106 can control the pump source to drain the oil in the monitoring pool 102, start the constant temperature device 105 for heating, and can dry the moisture of the probe of the on-line moisture monitoring sensor 1012, preventing the on-line moisture monitoring sensor 1012 from being in the detection over-limit state for a long time and avoiding damage to the on-line moisture monitoring sensor 1012.

[0083] It should be understood that various forms of processes shown above can be used, steps can be reordered, added or deleted. For example, the steps described in the present invention can be executed in parallel, sequentially or in a different order, as long as the desired results of the technical solution of the present invention can be achieved, and no limitation is made herein.

[0084] The above specific embodiments do not constitute a limitation to the protection scope of the present invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An online oil pretreatment system, characterized in that: include: Online monitoring module, monitoring pool, auxiliary monitoring module, pump source, constant temperature device and control module; The pump source is used to discharge the oil into the monitoring pool and to discharge the oil from the monitoring pool; The auxiliary monitoring module is used to monitor the environmental parameters of the monitoring pool; The control module is used to control the constant temperature device according to the environmental parameters; The constant temperature device is used to at least one of heat the monitoring pool and maintain a constant temperature according to the control of the control module; The online monitoring module is used to perform online monitoring of the oil in the monitoring pool and output the monitoring results.

2. The system according to claim 1, characterized in that The online monitoring module includes an online cleanliness monitoring sensor, an online moisture monitoring sensor, and an online viscosity monitoring sensor; The online cleanliness monitoring sensor is arranged at the liquid outlet of the monitoring pool, and the online cleanliness monitoring sensor is used to monitor the cleanliness of the oil in the monitoring pool; The online moisture monitoring sensor is placed in the monitoring pool, and the online moisture monitoring sensor is used to monitor the moisture of the oil in the monitoring pool; The online viscosity monitoring sensor is placed in the monitoring pool, and is used to monitor the viscosity, density and dielectric constant of the oil in the monitoring pool.

3. The system according to claim 1, characterized in that The auxiliary monitoring module includes a liquid level sensor and a liquid level protection unit; The liquid level sensor is placed in the monitoring tank, and is used to detect the liquid level of the oil in the monitoring tank; The liquid level protection unit is placed in the monitoring pool, and is used to control the pump source to stop discharging oil into the monitoring pool when the liquid level in the monitoring pool reaches a preset liquid level value.

4. The system according to claim 1, characterized in that The auxiliary monitoring module includes a temperature sensor, which is placed in the monitoring pool and is used to detect the temperature of the oil in the monitoring pool; the control module is used to control the constant temperature device to maintain a constant temperature when the temperature of the oil in the monitoring pool reaches a preset temperature.

5. The system according to claim 1, characterized in that A vent is provided above the monitoring pool, and the control module controls the constant temperature device to heat the monitoring pool, and bubbles in the oil in the monitoring pool are discharged through the vent.

6. The system according to claim 1, characterized in that It also includes a flow meter, which is used to monitor the flow rate of oil flowing out of the monitoring pool; The control module adjusts the rotation speed of the pump source according to the flow rate of the oil to control the oil in the monitoring pool to be discharged at a constant flow rate.

7. The system according to claim 1, characterized in that The pump source includes a first pump source and a second pump source, wherein the first pump source is used to discharge oil into the monitoring pool; and the second pump source is used to discharge oil from the monitoring pool.

8. The system according to claim 1, characterized in that The online oil pretreatment system also includes: a filter, a pressure sensor, a pressure reducing valve, a check valve, a liquid inlet pipeline and a liquid outlet pipeline; The liquid inlet pipeline is connected to the liquid inlet of the monitoring pool, and the liquid outlet pipeline is connected to the liquid outlet of the monitoring pool; the filter, the pressure sensor, the pressure reducing valve and the first pump source are sequentially arranged in the liquid inlet pipeline, and the filter is used to filter wear particles in the oil; the pressure sensor is used to detect the pressure of the liquid inlet pipeline; the pressure reducing valve is used to adjust the pressure of the liquid inlet pipeline; the flow meter, the online cleanliness monitoring sensor, the second pump source and the one-way valve are sequentially arranged in the liquid outlet pipeline, and the one-way valve is used to control the oil outflow and prevent the oil from flowing in the opposite direction.

9. An online oil pretreatment method, characterized in that: Applied to the online oil pretreatment system according to any one of claims 1 to 8, the method comprises: The control module controls the pump source to discharge the oil into the monitoring tank; The control module controls the constant temperature device according to the environmental parameters to heat the monitoring pool and maintain a constant temperature; The online monitoring module performs online monitoring on the oil in the monitoring pool and outputs the monitoring result.

10. The method according to claim 9, characterized in that After the oil in the monitoring pool is monitored online and the monitoring result is output, the method further includes: If the water content of the oil exceeds the limit, the control module controls the pump source to drain the oil in the monitoring pool and starts the thermostat to heat it.

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