Additive adding system and method for phosphate fire-resistant oil system

Abstract

The invention provides an additive adding system and method for a phosphate fire-resistant oil system, and the additive adding system comprises an additive adding control system, an additive quantitative adding device, an additive dissolving device, a vacuumizing device, an oil product injection device, an oil product discharge device and an additive adding control system which are connected, the additive quantitative adding device can automatically add an additive into the additive dissolving device, the additive dissolving device is connected with an oil system needing additive adding through the oil injection device and the oil discharge device, the additive is directly dissolved in the oil system, and all oil in the oil system gradually flows through the additive dissolving device. The phosphate fire-resistant oil additive adding device is simple in structure and convenient to operate, it is guaranteed that even additives with low solubility in phosphate fire-resistant oil can be added, after the device is connected into an oil system through a control system, the additive adding process can be automatically completed, oil products cannot be polluted, and the additive adding process can be simple, efficient and labor-saving.

Description

Technical Field

[0001] The invention belongs to the technical field of phosphate ester fire-resistant oil and lubricating oil, and in particular to an additive adding system and method for a phosphate ester fire-resistant oil system. Background Art

[0002] Phosphate ester fire-resistant oil is composed of triaryl phosphate ester, which is widely used in the speed control system of steam turbines and gas turbines due to its excellent fire resistance and lubrication performance. The difference between different brands of products lies in the different substituents on the benzene ring. Since phosphate ester fire-resistant oil products are chemically synthesized products, they have poor compatibility with additives. Currently, suppliers claim that they do not add antioxidants.

[0003] However, as an ester compound, phosphate fire-resistant oil is prone to hydrolysis in the presence of water. In addition, the main component of phosphate fire-resistant oil is triaryl phosphate, and there are substituents on the aromatic ring. In the presence of oxygen, oxidation reaction will occur, resulting in rapid deterioration of phosphate fire-resistant oil. During use, the oil acid value often increases, the resistivity decreases rapidly, and sludge is generated after a short running time. These can cause corrosion and jamming of the servo valve of the turbine speed control system. In severe cases, it can cause abnormal shutdown accidents of the unit, affecting the safe operation of the power plant turbine unit. At the same time, phosphate fire-resistant oil is expensive, and frequent oil replacement will increase the economic cost of the power industry; the replaced phosphate fire-resistant oil is a general hazardous waste, and improper disposal will pollute water and soil.

[0004] Although all suppliers claim that they do not add antioxidants, research has shown that some additives can improve the oxidation stability and hydrolysis stability of oil products, enhance the stability of phosphate ester fire-resistant oils, slow down the rate of change of acid value and resistivity during oil operation, delay the period of oil sludge generation, and extend the service life of phosphate ester fire-resistant oils. Related additives include 2,6-di-tert-butyl-4-methylphenyl) pentaerythritol diphosphite, 2,6 di-tert-butyl-p-cresol and Revonox 501. At present, the method of adding additives to lubricating oils is generally to take a certain amount of oil products to be supplemented with additives, calculate the mass of additives to be added based on the additive dosage and the total oil volume, and configure the weighed additives and the oil products to be supplemented with additives into a mother liquor of a certain concentration, and then add it to the system through the oil filter or the oil tank filling port, and circulate evenly with the operation of the system. However, for phosphate ester fire-resistant oils, the solubility of additives in oil is low. For example, the maximum solubility of 2,6-di-tert-butyl-4-methylphenyl) pentaerythritol diphosphite in phosphate ester fire-resistant oils at 50°C is approximately 0.01%, and it is impossible to prepare a high-concentration mother liquor. In addition, even for additives with a certain solubility in phosphate ester fire-resistant oils, because phosphate ester fire-resistant oils are easy to absorb moisture, when adding them by preparing the mother liquor method, it is easy to absorb moisture in the environment during the preparation and addition process, resulting in an increase in the moisture content of the oil. Furthermore, the process of preparing the mother liquor requires taking oil from the system, preparing the mother liquor, and then adding it to the system. The process is cumbersome, not only wasting manpower, but also easily contaminating the phosphate ester fire-resistant oil, laying hidden dangers for the subsequent use of the phosphate ester fire-resistant oil. Summary of the invention

[0005] In order to overcome the problems in the prior art, the present invention provides an additive adding system and method for a phosphate fire-resistant oil system, which solves the problem of adding additives to phosphate fire-resistant oil by preparing a mother liquor. Some additives have low solubility in phosphate fire-resistant oil and cannot be prepared as a mother liquor; some additives have a certain solubility in phosphate fire-resistant oil and can be prepared as a mother liquor. However, when preparing the mother liquor, it is easy to cause the moisture content of the phosphate fire-resistant oil to increase, resulting in pollution, and there are problems such as cumbersome process and waste of manpower.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an additive adding system for a phosphate ester fire-resistant oil system, comprising an additive adding control system, an additive quantitative adding device, an additive dissolving device, a vacuum device, an oil injection device, an oil discharge device and an additive adding control system connected, wherein the additive dissolving device comprises an additive dissolver, the additive dissolver is a sealing structure, a filter interlayer is arranged in the additive dissolver, the bottom of the filter interlayer is fixed and sealed to the bottom of the additive dissolver, and a stainless steel baffle is arranged on the top of the filter interlayer; the additive inlet of the additive dissolver is connected to the additive outlet of the additive quantitative adding device, and the additive inlet of the additive dissolver leads to the inside of the filter interlayer; the oil inlet of the additive dissolver is connected to the outlet of the oil injection device, the inlet of the oil injection device is connected to the oil return pipeline of the regulating and safety part, and the oil inlet of the additive dissolver leads to the inside of the filter interlayer; the vacuum port of the additive dissolver is connected to the vacuum device, and the vacuum port of the additive dissolver is connected to the space between the inner wall of the additive dissolver and the filter interlayer; the oil outlet of the additive dissolver is connected to the inlet of the oil discharge device, and the outlet of the oil discharge device is connected to the oil tank of the phosphate ester fire-resistant oil system.

[0007] Furthermore, the side wall of the filter interlayer is 3 cm to 5 cm away from the inner side wall of the additive dissolver, the stainless steel baffle is 2 cm to 3 cm away from the top inner wall of the additive dissolver, and the filter interlayer is a sintered filter with a pore size of 1 μm to 3 μm.

[0008] Furthermore, the additive quantitative adding device includes an additive intermediate placing device, which is arranged on the weight sensing device, the additive inlet of the additive intermediate placing device is connected to the additive storage device through a fourth electromagnetic regulating valve, and the additive outlet of the additive intermediate placing device is connected to the additive inlet of the additive dissolver through a third electromagnetic regulating valve; the vacuum port of the additive intermediate placing device is connected to the vacuum device, and a precision filter is arranged at the vacuum port, the filter aperture is 0.5μm to 1μm, and the vacuum degree in the additive intermediate placing device is detected by a second pressure sensor;

[0009] The weight sensing device, the fourth electromagnetic regulating valve, the second pressure sensor and the vacuum pumping device are all connected to the additive adding control system.

[0010] Furthermore, the vacuum pump includes a vacuum pump, a first inlet of the vacuum pump is connected to the vacuum port of the additive dissolver through a fourth electromagnetic regulating valve, and the vacuum degree in the additive dissolver is detected by a first pressure sensor; the second inlet of the vacuum pump is connected to the vacuum port of the additive intermediate placer through a fifth electromagnetic regulating valve, and the fourth electromagnetic regulating valve, the vacuum pump, the fifth electromagnetic regulating valve, and the first pressure sensor are all connected to the additive addition control system.

[0011] Furthermore, the oil injection device includes an oil feed pump, the inlet of the oil feed pump is connected to the oil return pipeline of the regulating and safety part, the outlet of the oil feed pump is connected to the oil inlet of the additive dissolver through a pipeline, a first electromagnetic regulating valve is arranged on the pipeline, and the first electromagnetic regulating valve and the oil feed pump are both connected to the additive addition control system.

[0012] Furthermore, the oil discharge device includes an oil pump, the inlet of the oil pump is connected to the oil outlet of the additive dissolver through a second electromagnetic regulating valve, the outlet of the oil pump is connected to the oil tank through a liquid flow sensor, and the second electromagnetic regulating valve, the oil pump, and the liquid flow sensor are all connected to the additive addition control system.

[0013] Furthermore, it also includes a temperature regulating device, which includes a first temperature sensor, a second temperature sensor, a metal bath heating device, and a temperature controller. The first temperature sensor is arranged at the oil inlet of the additive dissolver, and is used to detect the temperature of the oil entering the additive dissolver; the second temperature sensor is arranged at the oil outlet of the additive dissolver, and is used to detect the temperature of the oil discharged from the additive dissolver; the first temperature sensor and the second temperature sensor are connected to the additive addition control system for feedback of the oil temperature; the metal bath heating device is arranged on the outer wall of the additive dissolver, the metal bath heating device is connected to the temperature controller, and the temperature controller is connected to the additive addition control system.

[0014] Furthermore, the bottom of the additive dissolver is made of polytetrafluoroethylene, and a stirring device is provided at the bottom of the additive dissolver inside the filter interlayer. The stirring device includes an electromagnetic stirrer, an electromagnetic agitator, and an electromagnetic switch. The electromagnetic stirrer is arranged at the bottom of the additive dissolver inside the filter interlayer, and the electromagnetic agitator is arranged on the outside of the bottom of the additive dissolver. The electromagnetic stirrer is connected to the electromagnetic switch, and the electromagnetic switch is connected to the additive addition control system.

[0015] Furthermore, the solid additive in the additive dissolver 1 is one or more of 2,6-di-tert-butyl-4-methylphenyl) pentaerythritol diphosphite, 2,6-di-tert-butyl-p-cresol, and Revonox 501; the main component of the phosphate fire-resistant oil in the oil tank 26 is trixyl phosphate.

[0016] Furthermore, the additive adding system may also be used in a lubricating oil system to add additives to the lubricating oil system.

[0017] The present invention also provides a method for adding an additive to a phosphate ester fire-resistant oil system, which is performed using the above-mentioned system for adding an additive to a phosphate ester fire-resistant oil system, and the specific steps are as follows:

[0018] S1 The additive adding control system controls the vacuum limit in the additive intermediate placing device through the vacuum pumping device, the solenoid valve and the pressure sensor. The additive adding control system controls the opening and closing of the solenoid valve between the additive intermediate placing device and the additive storage device and receives the output signal of the weight sensor, so that the set mass of additive enters the additive intermediate placing device;

[0019] S2 additive adding control system controls the vacuum limit in the additive dissolving device through the vacuum pumping device, the solenoid valve and the pressure sensor, and transfers the set mass of additive in the additive intermediate storage device to the additive dissolving device by controlling the opening and closing of the solenoid valve between the additive intermediate storage device and the additive dissolving device and receiving the output signal of the weight sensor;

[0020] S3 Additive Addition Control System starts the oil discharging device and the oil injecting device. The oil injecting device adds the oil in the oil return pipeline of the regulating and safety parts into the filter interlayer of the additive dissolver. After the additive is dissolved in the oil, it is discharged with the oil through the filter interlayer to the space between the outer wall of the additive dissolver and the filter, and then enters the oil tank through the oil discharging device to realize circulation;

[0021] S4 After the additive addition control system reaches the set additive dissolution time, the additive addition control system closes the oil injection device, and after the oil discharge device discharges the remaining oil in the additive dissolution device, the additive addition control system closes the oil discharge device.

[0022] Compared with the prior art, the present invention has at least the following beneficial effects:

[0023] The present invention provides an additive adding system and method for a phosphate ester fire-resistant oil system, comprising an additive adding control system, an additive quantitative adding device, an additive dissolving device, a vacuum device, an oil injection device, an oil discharge device and an additive adding control system connected, wherein, through the control of the additive adding control system, the additive quantitative adding device can realize automatic transfer of additives into the additive dissolving device, the additive dissolving device is connected to the oil system to which the additive needs to be added through the oil injection device and the oil discharge device, a filter screen interlayer is provided in the additive dissolver, the filter screen interlayer is used to contain solid additives and oil products in the oil system, ensuring that undissolved additives do not enter the oil system, and the total amount of oil in the oil system gradually flows through the additive dissolving device, ensuring that even additives with low solubility in the phosphate ester fire-resistant oil can be added, the system can realize automatic completion of the additive adding process after it is connected to the oil system, is not limited by the solubility of the additive in the phosphate ester fire-resistant oil, will not pollute the oil products, and can make the additive adding process simple, efficient and labor-saving. Moreover, it has low cost, simple adding method, and high economic value and social value.

[0024] The present invention adopts the design of filter interlayer and stirring device to ensure the full dissolution of additives in oil products. The aperture design of filter interlayer (1μm~3μm) can effectively prevent undissolved additive particles from entering the oil system, thus ensuring the purity of oil products. The system is not limited by the solubility of additives in phosphate ester fire-resistant oil. Even for additives with low solubility, they can be effectively dissolved through the circulation of oil products, thereby expanding the types of additives that can be added.

[0025] The present invention can perform vacuuming multiple times through the design of the stainless steel plate on the top of the filter interlayer and the fine filter of the vacuum port of the intermediate additive placement device 13, thereby ensuring sufficient addition of additives, and preventing air and impurities from entering the oil system, effectively preventing contamination and oxidation of the oil, and extending the service life of the oil.

[0026] The entire process of adding the additive of the present invention is carried out in a closed system, which reduces energy waste and environmental pollution, while improving the utilization rate of the additive and reducing the operating cost; compared with the traditional method of preparing the mother solution, the addition method omits the complicated preparation steps, simplifies the operation process, and reduces the difficulty of operation; the amount of additive added, the dissolution time and the oil circulation volume can all be accurately controlled by the control system, ensuring the accuracy and stability of the additive addition. The addition method is not only applicable to the phosphate fire-resistant oil system, but also can be applied to other oil systems that require additives, and has a wide range of applicability; due to the simplification of the operation process, the improvement of efficiency and the reduction of pollution risks, the addition method has significant economic value and can bring considerable cost savings and benefit improvements to enterprises. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 The present invention provides a schematic diagram of an additive adding system for a phosphate fire-resistant oil system;

[0028] In the figure, 1. additive dissolver; 2. electromagnetic stirrer; 3. electromagnetic stirrer; 4. electromagnetic switch; 5. first temperature sensor; 6. first electromagnetic regulating valve; 7. oil feed pump; 8. second temperature sensor; 9. second electromagnetic regulating valve; 10. metal bath heating device; 11. temperature controller; 12. third electromagnetic regulating valve; 13. additive intermediate placer 13; 14. weight sensing device; 15. fourth electromagnetic regulating valve; 16. fifth electromagnetic regulating valve; 17. vacuum pump; 18. sixth electromagnetic regulating valve; 19. first pressure sensor; 20. second pressure sensor; 21. additive adding control system; 22. return oil pipeline of regulating and safety department; 23. oil pump; 24. additive storage device; 25. liquid flow sensor; 26. oil tank. DETAILED DESCRIPTION

[0029] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0030] like Figure 1 As shown, the present invention provides an additive adding system for a phosphate ester fire-resistant oil system, comprising an additive quantitative adding device, an additive dissolving device, an oil injection device, an oil discharge device, a temperature regulating device and an additive adding control system 21, wherein a filter screen interlayer is arranged in the additive dissolving device, the inlet of the additive dissolving device is arranged in the filter screen interlayer, the outlet is arranged between the filter screen interlayer and the inner wall of the additive dissolving device, the additive inlet of the additive dissolving device is arranged at the top, the additive inlet is connected to the outlet of the additive quantitative adding device to add the additive into the filter screen interlayer, and the inlet of the additive quantitative adding device is connected to the additive storage device 24; the oil of the additive dissolving device The product inlet is connected with the outlet of the oil injection device, the inlet of the oil injection device is connected with the return oil pipeline 22 of the regulating and safety department, the oil in the return oil pipeline of the regulating and safety department is passed into the filter interlayer, and the additive in the filter interlayer is dissolved in the oil; the oil product outlet of the additive dissolving device is connected with the inlet of the oil product discharge device, the outlet of the oil product discharge device is connected with the oil tank 26 of the phosphate ester fire-resistant oil system, the additive dissolved in the oil product passes through the filter interlayer and enters the oil tank 26 of the phosphate ester fire-resistant oil system, ensuring that undissolved additives do not enter the oil system, and all the oil in the oil system gradually flows through the additive dissolving device, ensuring that even additives with low solubility in phosphate ester fire-resistant oil can be added.

[0031] The temperature regulating device is used to heat the additive dissolving device so that its internal temperature reaches the optimal dissolving temperature of the additive. The temperature regulating device is connected to the additive adding control system 21 to realize the control of the dissolving temperature in the additive dissolving device.

[0032] The additive quantitative adding device, the additive dissolving device, the oil product injecting device, and the oil product discharging device are all connected to the additive adding control system 21 to realize the automatic quantitative adding of the additive;

[0033] Preferably, the additive dissolving device comprises an additive dissolver 1, which is a sealed structure, a filter interlayer is arranged in the additive dissolver 1, the side wall of the filter interlayer is 3cm to 5cm away from the inner side wall of the additive dissolver 1, the bottom of the filter interlayer is fixed and sealed to the bottom of the additive dissolver 1, a stainless steel baffle is arranged on the top of the filter interlayer, and the stainless steel baffle is 2cm to 3cm away from the top inner wall of the additive dissolver 1; the interior of the filter interlayer is used to hold solid additives and oil products in the oil system, and undissolved additives cannot enter the oil system through the filter interlayer. After the additives are dissolved in the oil product, they pass through the filter interlayer with the flow of the oil product and enter the oil system through the oil product outlet of the additive dissolver 1; the bottom of the additive dissolver 1 is made of polytetrafluoroethylene, and a stirring device is arranged at the bottom of the additive dissolver 1 inside the filter interlayer, which can realize electromagnetic stirring in the additive dissolver.

[0034] Furthermore, the additive inlet of the additive dissolver 1 is connected to the additive outlet of the additive quantitative adding device through the third electromagnetic regulating valve 12, and the additive inlet of the additive dissolver 1 leads to the interior of the filter screen interlayer.

[0035] Furthermore, the vacuum port of the additive dissolver 1 is connected to the vacuum device, and the vacuum port of the additive dissolver 1 is connected to the space between the inner wall of the additive dissolver 1 and the filter screen interlayer, and the vacuum degree in the additive dissolver 1 is detected by the first pressure sensor 19. By vacuuming the additive dissolver 1, the additive in the additive quantitative adding device is added to the additive dissolver 1;

[0036] Furthermore, the oil product inlet of the additive dissolver 1 is connected to the outlet of the oil product injection device, the oil product inlet of the additive dissolver 1 leads to the inside of the filter screen interlayer, and the oil product inlet of the additive dissolver 1 is arranged at the bottom of the additive dissolver 1;

[0037] Furthermore, the oil outlet of the additive dissolver 1 is connected to the inlet of the oil discharge device, and the outlet of the oil discharge device is connected to the oil tank 26 of the phosphate ester fire-resistant oil system. The oil outlet of the additive dissolver 1 is at the lower side of the container, 5 cm away from the bottom.

[0038] Furthermore, the filter mesh interlayer is a stainless steel sintered filter mesh with a pore size of 1 μm to 3 μm.

[0039] Furthermore, the stirring device includes an electromagnetic stirrer 2, an electromagnetic stirrer 3, and an electromagnetic switch 4. The electromagnetic stirrer 2 is arranged at the bottom of the additive dissolver 1 in the filter interlayer, and the electromagnetic stirrer 3 is arranged outside the bottom of the additive dissolver 1. The electromagnetic stirrer 3 is connected to the electromagnetic switch 4, and the electromagnetic switch 4 is connected to the additive addition control system 21;

[0040] Further, the solid additive in the additive dissolver 1 is one or more of 2,6-di-tert-butyl-4-methylphenyl) pentaerythritol diphosphite, 2,6-di-tert-butyl-p-cresol, and Revonox 501;

[0041] Bis(2,6-di-tert-butyl-4-methylphenyl)pentaerythritol diphosphite is sold by Xi'an Heping Huabo Reagent Co., Ltd., with analytical purity, and is a phosphite antioxidant;

[0042] 2,6-di-tert-butyl-p-cresol is sold by Hubei Chengfeng Chemical Co., Ltd.;

[0043] Revonox 501 is Revonox 501 sold by Shanghai Puzhan Industrial Co., Ltd., which belongs to the benzofuranone system, is a carbon-neutral free radical ion scavenger, and is a multifunctional lactone-type heat stabilizer and antioxidant;

[0044] The main component of the phosphate fire-resistant oil in the oil tank 26 of the present invention is trixylyl phosphate;

[0045] Preferably, the additive quantitative adding device comprises an additive intermediate placing device 13, which is arranged on a weight sensing device 14 for measuring the weight of the additive in the additive intermediate placing device 13, the additive inlet of the additive intermediate placing device 13 is connected to the additive storage device 24 through a fourth electromagnetic regulating valve 15, and the additive outlet of the additive intermediate placing device 13 is connected to the additive inlet of the additive dissolver 1 through a third electromagnetic regulating valve 12; the vacuum port of the additive intermediate placing device 13 is connected to the vacuum device, and a precision filter screen is arranged at the vacuum port, and the filter screen aperture is 0.5 μm to 1 μm, and the vacuum degree in the additive intermediate placing device 13 is detected by the second pressure sensor 20, and the additive in the additive storage device 24 is added to the additive intermediate placing device 13 by vacuuming the additive intermediate placing device 13;

[0046] Further, the weight sensing device 14, the fourth electromagnetic regulating valve 15, the second pressure sensor 20 and the vacuum device are all connected to the additive addition control system 21;

[0047] Furthermore, the weight sensing device 14 is an electronic scale of model EXHQ / YA-01, with a measuring range of 520g to 30200g and an increment of 0.1g.

[0048] Preferably, the oil injection device includes an oil feed pump 7, the inlet of the oil feed pump 7 is connected to the oil return pipeline 22 of the regulating and safety unit, the outlet of the oil feed pump 7 is connected to the oil inlet of the additive dissolver 1 through a pipeline, and a first electromagnetic regulating valve 6 is arranged on the pipeline, and the first electromagnetic regulating valve 6 and the oil feed pump 7 are both connected to the additive addition control system 21.

[0049] Preferably, the flow rate of the oil entering the additive dissolver 1 is 1 L / min to 1.5 L / min.

[0050] Preferably, the oil discharge device includes an oil pump 23, the inlet of the oil pump 23 is connected to the oil outlet of the additive dissolver 1 through the second electromagnetic regulating valve 9, the outlet of the oil pump 23 is connected to the oil tank 26 through the liquid flow sensor 25, and the second electromagnetic regulating valve 9, the oil pump 23, and the liquid flow sensor 25 are all connected to the additive addition control system 21.

[0051] The temperature regulating device comprises a first temperature sensor 5, a second temperature sensor 8, a metal bath heating device 10, and a temperature controller 11. The first temperature sensor 5 is arranged at the oil product inlet of the additive dissolver 1, and is used to detect the temperature of the oil product entering the additive dissolver 1. The second temperature sensor 8 is arranged at the oil product outlet of the additive dissolver 1, and is used to detect the temperature of the oil product discharged from the additive dissolver 1. The first temperature sensor 5 and the second temperature sensor 8 are connected to the additive adding control system 21 for feeding back the oil product temperature. The metal bath heating device 10 is arranged on the outer wall of the additive dissolver 1, and the metal bath heating device 10 is connected to the temperature controller 11, and the temperature controller 11 is connected to the additive adding control system 21. When the first temperature sensor 5 detects that the oil temperature at the oil product inlet of the additive dissolver 1 is lower than the minimum limit of the oil temperature, the additive adding control system 21 turns on the heating switch of the temperature controller 11, and the metal bath heating device 10 starts to heat the additive dissolver 1. When the second temperature sensor 8 detects that the oil temperature at the oil product outlet of the additive dissolver 1 is higher than the maximum limit of the oil temperature, the additive adding control system 21 turns off the temperature controller 11, and the metal bath heating device 10 stops heating the additive dissolver 1.

[0052] The vacuum pump 17 includes a vacuum pump 17, a first inlet of the vacuum pump 17 is connected to the vacuum port of the additive dissolver 1 through the fifth electromagnetic regulating valve 16, a second inlet of the vacuum pump 17 is connected to the vacuum port of the additive intermediate placer 13 through the sixth electromagnetic regulating valve 18, and the fifth electromagnetic regulating valve 16, the vacuum pump 17, and the sixth electromagnetic regulating valve 18 are all connected to the additive addition control system 21.

[0053] Furthermore, the above-mentioned additive adding system can also be used in a lubricating oil system to add additives to the lubricating oil system.

[0054] like Figure 1 As shown, when the additive adding system for the phosphate fire-resistant oil system of the present invention is used to automatically add additives, the specific steps are as follows:

[0055] S1 Setting Parameters

[0056] Turn on the additive adding control system 21, set the weight of the additive added to the additive dissolver at a time, the number of additions, the minimum limit of the oil temperature of the oil entering the additive dissolver 1, the maximum limit of the oil temperature of the oil discharged from the additive dissolver 1, the maximum and minimum limits of the vacuum degree in the additive intermediate placement device 13, the maximum and minimum limits of the vacuum degree in the additive dissolver 1, and the additive dissolution time;

[0057] S2 Add additives to the intermediate additive placement device 13

[0058] The additive adding control system 21 turns on the sixth electromagnetic regulating valve 18 and the vacuum pump 17 to evacuate the additive intermediate placing device 13, and the second pressure sensor 20 transmits the vacuum degree in the additive intermediate placing device 13 to the additive adding control system 21. When the vacuum degree data in the additive intermediate placing device 13 reaches the high vacuum degree limit of the additive intermediate placing device 13, the additive adding control system 21 turns off the vacuum pump 17 and the sixth electromagnetic regulating valve 18, and opens the fourth electromagnetic regulating valve 15. The additive in the additive storage device 24 enters the additive intermediate placing device 13 through the pipeline through the pressure difference. When the data transmitted back by the second pressure sensor 20 reaches the low vacuum degree limit of the additive intermediate placing device 13, the additive adding control system 21 turns off the fourth electromagnetic regulating valve 15.

[0059] S3 adds quantitative additives to the intermediate additive placement device 13

[0060] Repeat S2 until the weight sensing device 14 detects that the weight of the additive in the intermediate additive placement device 13 reaches the set single-time additive weight of the additive added to the additive dissolver, and feeds back the weight signal to the additive addition control system 21, and the additive addition control system 21 closes the fourth electromagnetic regulating valve 15.

[0061] S4 Add additives to the additive dissolver

[0062] The additive adding control system 21 turns on the fifth electromagnetic regulating valve 16 and the vacuum pump 17 to evacuate the additive dissolver 1, and the first pressure sensor 19 transmits the vacuum degree in the additive dissolver 1 to the additive adding control system 21. When the vacuum degree data in the additive dissolver 1 reaches the high vacuum degree limit of the additive dissolver 1, the additive adding control system 21 turns off the vacuum pump 17 and the fifth electromagnetic regulating valve 16, and opens the third electromagnetic regulating valve 12, so that the additive in the additive intermediate placement device 13 enters the additive dissolver 1 through the pipeline. When the data transmitted back by the first pressure sensor 19 reaches the low vacuum degree limit of the additive dissolver 1, the additive adding control system 21 turns off the third electromagnetic regulating valve 12.

[0063] S5 adds quantitative additives to the additive dissolver

[0064] Repeat S4. When the weight sensing device 14 detects that the weight reduction value of the additive in the additive intermediate placement device 13 reaches the set single-time additive weight value of the additive added to the additive dissolver, the weight sensing device 14 feeds back the weight signal to the additive addition control system 21, and the additive addition control system 21 closes the third electromagnetic regulating valve 12.

[0065] S6 completed the number of added settings

[0066] Repeat S2 to S5 to the set number of times.

[0067] S7 dissolves the additive and circulates it evenly in the system

[0068] The additive addition control system 21 opens the first electromagnetic regulating valve 6, the oil feed pump 7, and the second electromagnetic regulating valve 9. The oil in the system enters the additive dissolver 1 from the oil return pipeline 22 of the regulating and safety unit. As the oil enters and the pressure in the additive dissolver 1 increases, the oil is discharged through the filter to the space between the outer wall of the additive dissolver 1 and the filter, and then enters the oil tank 26 through the pipeline.

[0069] When the second temperature sensor 8 transmits the temperature data of the oil product to the additive addition control system 21, the additive addition control system 21 turns on the electromagnetic switch 4, the electromagnetic stirrer 3 starts, and the electromagnetic stirrer 2 at the bottom of the additive dissolver 1 begins to stir to mix the oil product and the additive, and the dissolved additive flows into the oil tank 26 with the flow of the oil product, and the undissolved additive is gradually dissolved in the additive dissolver 1 until the additive is completely dissolved and enters the oil tank 26.

[0070] Temperature control of S8 additive dissolver

[0071] During the additive dissolution process, the first temperature sensor 5 transmits the oil temperature at the oil inlet of the additive dissolver 1 to the additive addition control system 21. When the oil temperature is lower than the minimum oil temperature limit, the heating switch of the temperature controller 11 is turned on; the second temperature sensor 8 transmits the oil temperature at the oil outlet of the additive dissolver 1 to the additive addition control system 21. When the oil temperature is higher than the maximum oil temperature limit, the heating switch 6 of the temperature controller 11 is turned off.

[0072] S9 controls the additive addition process

[0073] When the oil inlet pump 7 is started in S7, the additive addition control system 21 starts timing. When the set additive dissolution time is reached, the first electromagnetic regulating valve 6 and the oil inlet pump 7 are closed, the heating function of the metal bath heating device 10 is stopped, and the oil extraction pump 23 is turned on to pump the residual oil in the additive dissolver 1 into the oil tank 26. When the value of the liquid flow sensor 25 gradually changes from a certain value to 0, the oil extraction pump 23 and the second electromagnetic regulating valve 9 are closed.

[0074] Example 1

[0075] When the additive adding system for phosphate fire-resistant oil system of the present invention is used to automatically add additives, the specific steps are as follows:

[0076] The determined additive is bis(2,6-di-tert-butyl-4-methylphenyl)pentaerythritol diphosphite, the weight of the phosphate fire-resistant oil in the power plant tank is 1000kg, and the amount of the additive added is 50g;

[0077] S1 Setting Parameters

[0078] The additive adding control system 21 is turned on, and the weight of the additive added to the additive dissolver at a single time is set to 50 g, the number of additions is set to 1, the minimum limit of the oil temperature of the oil entering the additive dissolver 1 is 55° C., the maximum limit of the oil temperature of the oil discharged from the additive dissolver 1 is 60° C., the maximum limit of the vacuum degree in the additive intermediate placement device 13 is -50 kPa and the minimum limit is -20 kPa, the maximum limit of the vacuum degree in the additive dissolver 1 is -50 kPa and the minimum limit is -20 kPa, and the additive dissolution time is 144 h;

[0079] S2 Add additives to the intermediate additive placement device 13

[0080] The additive adding control system 21 turns on the sixth electromagnetic regulating valve 18 and the vacuum pump 17 to evacuate the additive intermediate placing device 13, and the second pressure sensor 20 transmits the vacuum degree in the additive intermediate placing device 13 to the additive adding control system 21. When the vacuum degree data in the additive intermediate placing device 13 reaches the high vacuum degree limit of the additive intermediate placing device 13, the additive adding control system 21 turns off the vacuum pump 17 and the sixth electromagnetic regulating valve 18, and opens the fourth electromagnetic regulating valve 15. The additive in the additive storage device 24 enters the additive intermediate placing device 13 through the pipeline through the pressure difference. When the data transmitted back by the second pressure sensor 20 reaches the low vacuum degree limit of the additive intermediate placing device 13, the additive adding control system 21 turns off the fourth electromagnetic regulating valve 15.

[0081] S3 adds quantitative additives to the intermediate additive placement device 13

[0082] Repeat S2 until the weight sensing device 14 detects that the weight of the additive in the intermediate additive placement device 13 reaches the set single additive addition weight, and feeds back the weight signal to the additive addition control system 21, and the additive addition control system 21 closes the fourth electromagnetic regulating valve 15.

[0083] S4 Add additives to the additive dissolver

[0084] The additive adding control system 21 turns on the fifth electromagnetic regulating valve 16 and the vacuum pump 17 to evacuate the additive dissolver 1, and the first pressure sensor 19 transmits the vacuum degree in the additive dissolver 1 to the additive adding control system 21. When the vacuum degree data in the additive dissolver 1 reaches the high vacuum degree limit of the additive dissolver 1, the additive adding control system 21 turns off the vacuum pump 17 and the fifth electromagnetic regulating valve 16, and opens the third electromagnetic regulating valve 12, so that the additive in the additive intermediate placement device 13 enters the additive dissolver 1 through the pipeline. When the data transmitted back by the first pressure sensor 19 reaches the low vacuum degree limit of the additive dissolver 1, the additive adding control system 21 turns off the third electromagnetic regulating valve 12.

[0085] S5 adds quantitative additives to the additive dissolver

[0086] Repeat S4. When the weight sensing device 14 detects that the weight reduction value of the additive in the additive intermediate placement device 13 reaches the weight value of the additive added to the fuel tank, the weight sensing device 14 feeds back the weight signal to the additive addition control system 21, and the additive addition control system 21 closes the third electromagnetic regulating valve 12.

[0087] S6 dissolves the additive and circulates it evenly in the system

[0088] The additive addition control system 21 opens the first electromagnetic regulating valve 6, the oil feed pump 7, and the second electromagnetic regulating valve 9. The oil in the system enters the additive dissolver 1 from the oil return pipeline 22 of the regulating and safety unit. As the oil enters and the pressure in the additive dissolver 1 increases, the oil is discharged through the filter to the space between the outer wall of the additive dissolver 1 and the filter, and then enters the oil tank 26 through the pipeline.

[0089] When the second temperature sensor 8 transmits the temperature data of the oil product to the additive addition control system 21, the additive addition control system 21 turns on the electromagnetic switch 4, the electromagnetic stirrer 3 starts, and the electromagnetic stirrer 2 at the bottom of the additive dissolver 1 begins to stir to mix the oil product and the additive, and the dissolved additive flows into the oil tank 26 with the flow of the oil product, and the undissolved additive is gradually dissolved in the additive dissolver 1 until the additive is completely dissolved and enters the oil tank 26.

[0090] Temperature control of S7 additive dissolver

[0091] During the additive dissolution process, the first temperature sensor 5 transmits the oil temperature at the oil product inlet of the additive dissolver 1 to the additive addition control system 21. When the oil temperature is lower than 55°C, the heating switch of the temperature controller 11 is turned on; the second temperature sensor 8 transmits the oil temperature at the oil product outlet of the additive dissolver 1 to the additive addition control system 21. When the oil temperature is higher than 60°C, the heating switch 6 of the temperature controller 11 is turned off. The above operation can keep the oil temperature in the additive dissolver 1 at 55°C to 60°C during the additive dissolution process.

[0092] S8 controls the additive addition process

[0093] When the oil inlet pump 7 is started in S6, the additive addition control system 21 starts timing. When the set single additive dissolution time is reached, the first electromagnetic regulating valve 6 and the oil inlet pump 7 are closed, the heating function of the metal bath heating device 10 is stopped, and the oil extraction pump 23 is turned on to pump the residual oil in the additive dissolver 1 into the oil tank 26. When the value of the liquid flow sensor 25 gradually changes from a certain value to 0, the oil extraction pump 23 and the second electromagnetic regulating valve 9 are closed.

[0094] Example 2

[0095] When the additive adding system for phosphate fire-resistant oil system of the present invention is used to automatically add additives, the specific steps are as follows:

[0096] The determined additive is 2,6-di-tert-butyl-p-cresol, the weight of the phosphate fire-resistant oil in the power plant tank is 1000kg, and the amount of the additive added is 500g;

[0097] S1 Setting Parameters

[0098] The additive adding control system 21 is turned on, and the weight of the additive added to the additive dissolver at a single time is set to 250 g, the number of additions is set to 2, the minimum limit of the oil temperature of the oil entering the additive dissolver 1 is 55° C., the maximum limit of the oil temperature of the oil discharged from the additive dissolver 1 is 60° C., the maximum limit of the vacuum degree in the additive intermediate placement device 13 is -50 kPa and the minimum limit is -20 kPa, the maximum limit of the vacuum degree in the additive dissolver 1 is -50 kPa and the minimum limit is -20 kPa, and the additive dissolution time is 72 h;

[0099] S2 to S5 are the same as in Example 1;

[0100] S6, repeat S2 to S5 once.

[0101] The subsequent dissolving of the additive and evenly circulating it in the system, the temperature control of the additive dissolver, and the control of the additive adding process are the same as in Example 1.

[0102] Example 3

[0103] When the additive adding system for phosphate fire-resistant oil system of the present invention is used to automatically add additives, the specific steps are as follows:

[0104] The additive determined is Revonox 501, the weight of the phosphate ester fire-resistant oil in the power plant tank is 2000 kg, and the amount of additive added is 100 g;

[0105] S1 Setting Parameters

[0106] The additive adding control system 21 is turned on, and the weight of the additive added to the additive dissolver at a single time is set to 100 g, the number of additions is set to 1, the minimum limit of the oil temperature of the oil entering the additive dissolver 1 is 55° C., the maximum limit of the oil temperature of the oil discharged from the additive dissolver 1 is 60° C., the maximum limit of the vacuum degree in the additive intermediate placement device 13 is -50 kPa and the minimum limit is -20 kPa, the maximum limit of the vacuum degree in the additive dissolver 1 is -50 kPa and the minimum limit is -20 kPa, and the additive dissolution time is 72 h;

[0107] The remaining steps are the same as those in Example 1.

[0108] Example 4

[0109] When the additive adding system for phosphate fire-resistant oil system of the present invention is used to automatically add additives, the specific steps are as follows:

[0110] The additives determined are 2,6-di-tert-butyl-4-methylphenyl) pentaerythritol diphosphite, 2,6-di-tert-butyl-p-cresol and Revonox 501. The weight of the phosphate fire-resistant oil in the power plant tank is 1000 kg, and the amount of additives added is 400 g.

[0111] S1 Setting Parameters

[0112] Turn on the additive adding control system 21, set the weight of the additive added to the additive dissolver at a single time to 200g, the number of additions to 2, the minimum limit of the oil temperature of the oil entering the additive dissolver 1 to 55°C, the maximum limit of the oil temperature of the oil discharged from the additive dissolver 1 to 60°C, the maximum limit of the vacuum degree in the additive intermediate placement device 13 to -50kPa and the minimum limit to -20kPa, the maximum limit of the vacuum degree in the additive dissolver 1 to -50kPa and the minimum limit to -20kPa, and the additive dissolving time to 150h;

[0113] The remaining steps are the same as those in Example 2.

[0114] The invention provides an additive adding system and method for a phosphate ester fire-resistant oil system. The system comprises an additive quantitative adding device, an additive dissolving device, an oil product injection device, an oil product discharge device and a control system, and solves the problem that the additive is added to the phosphate ester fire-resistant oil by preparing a mother liquid, and some existing additives have low solubility in the phosphate ester fire-resistant oil and cannot prepare a mother liquid; some additives have a certain solubility in the phosphate ester fire-resistant oil and can prepare a mother liquid. However, when preparing the mother liquid, it is easy to cause the water content of the phosphate fire-resistant oil to increase, resulting in pollution, and there are problems such as cumbersome process and waste of manpower.

Claims

1. An additive adding system for a phosphate ester fire-resistant oil system, characterized in that: The invention comprises an additive adding control system (21), an additive quantitative adding device, an additive dissolving device, a vacuum device, an oil injection device, an oil discharge device and the additive adding control system (21) are connected, wherein the additive dissolving device comprises an additive dissolver (1), the additive dissolver (1) is a sealed structure, a filter sandwich is arranged in the additive dissolver (1), the bottom of the filter sandwich is fixed and sealedly connected to the bottom of the additive dissolver (1), and a stainless steel baffle is arranged on the top of the filter sandwich; the additive inlet of the additive dissolver (1) is connected to the additive outlet of the additive quantitative adding device, and the additive dissolver (1) is sealed. The additive inlet leads to the interior of the filter screen interlayer; the oil product inlet of the additive dissolver (1) is connected to the outlet of the oil product injection device, the inlet of the oil product injection device is connected to the oil return pipeline (22) of the regulating and safety part, and the oil product inlet of the additive dissolver (1) leads to the interior of the filter screen interlayer; the vacuum port of the additive dissolver (1) is connected to the vacuum device, the vacuum port of the additive dissolver (1) is connected to the space between the inner wall of the additive dissolver (1) and the filter screen interlayer; the oil product outlet of the additive dissolver (1) is connected to the inlet of the oil product discharge device, and the outlet of the oil product discharge device is connected to the oil tank (26) of the phosphate ester fire-resistant oil system.

2. The additive adding system for phosphate ester fire-resistant oil system according to claim 1, characterized in that: The side wall of the filter interlayer is 3 cm to 5 cm away from the inner side wall of the additive dissolver (1), and the stainless steel baffle is 2 cm to 3 cm away from the top inner wall of the additive dissolver (1). The filter interlayer is a sintered filter with a pore size of 1 μm to 3 μm.

3. The additive adding system for phosphate ester fire-resistant oil system according to claim 1, characterized in that: The additive quantitative adding device comprises an additive intermediate placement device (13), the additive intermediate placement device (13) is arranged on a weight sensing device (14), the additive inlet of the additive intermediate placement device (13) is connected to the additive storage device (24) through a fourth electromagnetic regulating valve (15), and the additive outlet of the additive intermediate placement device (13) is connected to the additive inlet of the additive dissolver (1) through a third electromagnetic regulating valve (12); the vacuum port of the additive intermediate placement device (13) is connected to the vacuum device, and a precision filter screen is arranged at the vacuum port, the filter screen aperture is 0.5 μm to 1 μm, and the vacuum degree in the additive intermediate placement device (13) is detected by a second pressure sensor (20); The weight sensing device (14), the fourth electromagnetic regulating valve (15), the second pressure sensor (20) and the vacuum pumping device are all connected to the additive adding control system (21); The vacuum pump (17) comprises a vacuum pump (17), a first inlet of the vacuum pump (17) being connected to a vacuum port of an additive dissolver (1) via a fifth electromagnetic regulating valve (16), and a first pressure sensor (19) detecting the vacuum degree in the additive dissolver (1); a second inlet of the vacuum pump (17) being connected to a vacuum port of an additive intermediate placement device (13) via a sixth electromagnetic regulating valve (18), and the fifth electromagnetic regulating valve (16), the vacuum pump (17), the sixth electromagnetic regulating valve (18), and the first pressure sensor (19) are all connected to an additive addition control system (21).

4. The additive adding system for phosphate ester fire-resistant oil system according to claim 1, characterized in that: The oil injection device comprises an oil feed pump (7), the inlet of the oil feed pump (7) is connected to the oil return pipeline (22) of the regulating and safety part, the outlet of the oil feed pump (7) is connected to the oil inlet of the additive dissolver (1) through a pipeline, a first electromagnetic regulating valve (6) is arranged on the pipeline, and the first electromagnetic regulating valve (6) and the oil feed pump (7) are both connected to the additive addition control system (21).

5. The additive adding system for phosphate ester fire-resistant oil system according to claim 1, characterized in that: The oil discharge device comprises an oil pump (23); the inlet of the oil pump (23) is connected to the oil outlet of the additive dissolver (1) via a second electromagnetic regulating valve (9); the outlet of the oil pump (23) is connected to the oil tank (26) via a liquid flow sensor (25); the second electromagnetic regulating valve (9), the oil pump (23) and the liquid flow sensor (25) are all connected to the additive addition control system (21).

6. The additive adding system for phosphate ester fire-resistant oil system according to claim 1, characterized in that: The system also comprises a temperature regulating device, which comprises a first temperature sensor (5), a second temperature sensor (8), a metal bath heating device (10), and a temperature controller (11). The first temperature sensor (5) is arranged at the oil product inlet of the additive dissolver (1) and is used to detect the temperature of the oil product entering the additive dissolver (1); the second temperature sensor (8) is arranged at the oil product outlet of the additive dissolver (1) and is used to detect the temperature of the oil product discharged from the additive dissolver (1); the first temperature sensor (5) and the second temperature sensor (8) are connected to the additive addition control system (21) for feeding back the oil product temperature; the metal bath heating device (10) is arranged on the outer wall of the additive dissolver (1), the metal bath heating device (10) is connected to the temperature controller (11), and the temperature controller (11) is connected to the additive addition control system (21).

7. The additive adding system for phosphate ester fire-resistant oil system according to claim 1, characterized in that: The bottom of the additive dissolver (1) is made of polytetrafluoroethylene. A stirring device is arranged at the bottom of the additive dissolver (1) inside the filter screen interlayer. The stirring device comprises an electromagnetic stirrer (2), an electromagnetic stirrer (3), and an electromagnetic switch (4). The electromagnetic stirrer (2) is arranged at the bottom of the additive dissolver (1) inside the filter screen interlayer. The electromagnetic stirrer (3) is arranged outside the bottom of the additive dissolver (1). The electromagnetic stirrer (3) is connected to the electromagnetic switch (4), and the electromagnetic switch (4) is connected to an additive addition control system (21).

8. The additive adding system for phosphate ester fire-resistant oil system according to claim 1, characterized in that: The solid additive in the additive dissolver 1 is one or more of 2,6-di-tert-butyl-4-methylphenyl) pentaerythritol diphosphite, 2,6-di-tert-butyl-p-cresol, and Revonox 501; the main component of the phosphate fire-resistant oil in the oil tank 26 is trixyl phosphate.

9. An additive adding system for a phosphate ester fire-resistant oil system according to any one of claim 1, characterized in that: The additive adding system is used in a lubricating oil system to add additives to the lubricating oil system.

10. A method for adding additives to a phosphate ester fire-resistant oil system, characterized in that: The method is carried out by using an additive adding system for a phosphate fire-resistant oil system as described in claims 1 to 9, and the specific steps are as follows: S1 The additive adding control system (21) starts the vacuuming device. When the vacuum degree in the additive dissolving device reaches the set vacuum degree maximum limit, the additive adding control system (21) starts the additive quantitative adding device. The additive quantitative adding device adds a quantitative additive to the filter screen interlayer of the additive dissolving device. When the vacuum degree in the additive dissolving device reaches the set vacuum degree minimum limit, the additive adding control system (21) closes the additive quantitative adding device. S2 The additive adding control system (21) starts the oil product discharging device and the oil product injecting device. The oil product injecting device adds the oil product in the return oil pipeline (22) of the regulating and safety part into the filter screen interlayer of the additive dissolver (1). After the additive is dissolved in the oil product, it is discharged with the oil product through the filter screen interlayer to the space between the outer wall of the additive dissolver (1) and the filter screen, and then enters the oil tank (26) through the oil product discharging device to realize circulation; S3 After the additive adding control system (21) reaches the set additive dissolving time, the additive adding control system (21) closes the oil injection device, and after the oil discharging device discharges the remaining oil in the additive dissolving device, the additive adding control system (21) closes the oil discharging device.

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