On-site recycling and reusing method for gear oil of wind driven generator

Abstract

The invention discloses a wind driven generator gear oil on-site recycling method which comprises the following steps: S1, recovering wind driven generator gear oil on site, and detecting the contents of a hindered phenol antioxidant, an aromatic amine antioxidant and phosphorus to obtain a detection result; and S2, supplementing the hindered phenol antioxidant, the aromatic amine antioxidant and the phosphorus-containing extreme pressure anti-wear agent according to the detection result in the step 1. The oxidation stability (121 DEG C, 312 h) test of the wind driven generator gear oil recycled in the invention shows that the kinematic viscosity increase value at 100 DEG C is not greater than 2%, and the precipitation value increase value is not greater than 0.1 ml. And the quality level of new oil is reached.

Description

Technical Field

[0001] The present invention belongs to the technical field of wind turbine gear oil, and in particular relates to a method for on-site recycling and reuse of wind turbine gear oil. Background Art

[0002] At present, when the gear oil used in wind farms expires, new oil needs to be replaced. Most of the gear oil is collected by waste oil companies. After being mixed with various waste oils, it is recycled. After the waste oil is filtered by a conventional oil filter, the water, metal and large particle impurities in the oil can be effectively removed. However, when the waste oil contains very fine free carbon and other substances that will cause the color to become darker or even black. In fact, most of the expired gear oil has not deteriorated and can still be used or utilized. There is a lack of a method for on-site recycling and reuse of wind turbine gear oil in the prior art. Summary of the Invention

[0003] In view of this, the present invention aims to provide a method for on-site recycling and reuse of wind turbine gear oil to solve at least one technical problem in the background art.

[0004] To achieve the above object, the technical solution of the present invention is realized as follows: A method for on-site recycling and reuse of wind turbine gear oil includes the following steps: S1: On-site recycling of wind turbine gear oil, detecting the content of hindered phenol antioxidants, aromatic amine antioxidants, and phosphorus to obtain a detection result; S2: Supplement the hindered phenol antioxidants, aromatic amine antioxidants, and phosphorus-containing extreme pressure anti-wear agents according to the detection results in step 1.

[0005] Further, the on-site recycling of wind turbine gear oil in step S1 includes connecting an oil suction pump to the main gearbox of the wind turbine, starting the oil suction pump, heating the wind power gear oil pumped out by the oil suction pump, performing air dehydration, then performing impurity filtration and on-line detection, and detecting the content of hindered phenol antioxidants and aromatic amine antioxidants in the wind turbine gear oil through an on-line detection device.

[0006] Further, the heating temperature of the wind power gear oil pumped out by the oil suction pump is 45-50 °C.

[0007] Further, in the impurity filtration, particles above 3 μm are filtered out, and the cleanliness needs to meet not greater than grade 8.

[0008] Further, the phosphorus-containing extreme pressure anti-wear agent in step S2 includes one or more of acidic phosphoric acid ester amine, triphenyl thiophosphate, tricresyl phosphate, amino thiocarbamate, phosphoric acid amine mixture, and dialkyl dithiophosphate.

[0009] Further, in step S2, the phosphorus-containing extreme pressure anti-wear agent is selected according to the viscosity grade of the wind turbine gear oil.

[0010] Furthermore, for the wind turbine gear oil with a viscosity grade of 320, the phosphorus-containing extreme pressure and anti-wear agent is triphenyl thiophosphate, dialkyldithiophosphate, tricresyl phosphate, or aminothiocarbamate, and includes one of acidic phosphoric acid ester amine salts or phosphoric acid amine mixtures; For the wind turbine gear oil with a viscosity grade of 220, the phosphorus-containing extreme pressure and anti-wear agent is a phosphoric acid amine mixture, triphenyl thiophosphate, acidic phosphoric acid ester amine salt, tricresyl phosphate, or aminothiocarbamate; For the wind turbine gear oil with a viscosity grade of 150, the phosphorus-containing extreme pressure and anti-wear agent is a phosphoric acid amine mixture, acidic phosphoric acid ester amine salt, dialkyldithiophosphate, tricresyl phosphate, or aminothiocarbamate.

[0011] Furthermore, the hindered phenol antioxidant includes one or a mixture of two of high molecular weight phenol antioxidants, high molecular weight hindered phenol antioxidants, and phenol ester antioxidants.

[0012] Furthermore, the aromatic amine antioxidant includes one or a mixture of two of N-phenyl-α-naphthylamine, alkyldiphenylamine, and octyl / butyldiphenylamine.

[0013] Compared with the prior art, the method for on-site recycling and reuse of the wind turbine gear oil described in the present invention has the following advantages: 1. This application can reduce the purchase of new oil. Through recycling and reuse, it can reduce the demand for new gear oil, save procurement costs, and can also reduce the treatment cost, reduce the waste oil treatment cost, and avoid high waste oil treatment expenses.

[0014] 2. This application can maintain the quality of the oil product. Through filtration and purification, it can ensure the stable performance of the gear oil, reduce equipment wear, extend the service life, and can also reduce the downtime. On-site treatment reduces the equipment downtime and improves the power generation efficiency.

[0015] 3. This application can be processed on-site without transporting waste oil, saving time and transportation costs, and is easy to operate. And the processed oil product can be immediately used, improving efficiency. The growth value of the kinematic viscosity at 100°C in the oxidation stability test (121°C, 312h) of the wind turbine gear oil recycled and reused in this application is not more than 2%, and the growth value of the precipitation value is not more than 0.1 ml. It reaches the quality level of new oil. Detailed Embodiments

[0016] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other.

[0017] The present invention will be described in detail below with reference to the embodiments.

[0018] 2,6-Di-tert-butyl-p-cresol was purchased from Jinzhou Xinxing Petroleum Additive Co., Ltd., code named T501; high molecular weight phenolic antioxidant was purchased from BASF, code named L107; high molecular weight hindered phenolic antioxidant was purchased from Jinzhou Xinxing Petroleum Additive Co., Ltd., code named L5135; phenolic ester antioxidant was purchased from Jinzhou Huifatianhe Chemical Co., Ltd., code named T508; octyl / butyl diphenylamine was purchased from Jinzhou Xinxing Petroleum Additive Co., Ltd., code named T557; N-phenyl-α-naphthylamine was purchased from Jinzhou Shengda Chemical Co., Ltd., code named T531; alkyl diphenylamine was purchased from Jinzhou Chenghua New Materials Co., Ltd., code named T534.

[0019] Acidic phosphate amine salt was purchased from Shenyang Hualun Lubricant Additive Co., Ltd., code named T308; triphenyl thiophosphate was purchased from Jinzhou Shengda Chemical Co., Ltd., code named T309; tricresyl phosphate was purchased from Zibo Huihua Petroleum Additive Co., Ltd., code named T306; aminothiocarbamate was purchased from Shenyang Hualun Lubricant Additive Co., Ltd., code named T323; phosphoric acid amine mixture was purchased from BASF, code named IR349; dialkyl dithiophosphate was purchased from BASF, code named IR353.

[0020] Example 1 (320 viscosity grade wind turbine gear oil) Set the outlet temperature of the heating pump at 50 °C. The suction pump is connected to the main gearbox of the wind turbine. Start the suction pump. After the wind turbine gear oil pumped out by the suction pump is heated by the heating pump, it flows through the vacuum dehydrator, impurity filter, on-line detection device, and additive replenishment device in sequence and then flows back to the main gearbox. When the on-line detection device detects that the moisture content of the gear oil is not more than trace and the cleanliness is not more than 8, start to detect the content of T501 antioxidant, the content of hindered phenolic or aromatic amine antioxidants, and the phosphorus content. The test results show that the content of T501 is 80% of the new oil, the residual phenolic antioxidant is 53.7% of the new oil, and the residual aromatic amine antioxidant is 98.8% of the new oil. According to the results, add 20% of T501 and add 46.3% of L5135. The loss of aromatic amine antioxidants is very small and no replenishment is required. In addition, the detected phosphorus content is 80% of the new oil, and add 20% of the phosphorus-containing additive package (T308:T309:IR353:T306:T323 = 1:1:1:3:2). After replenishment, the offline detection of FZG of the wind turbine gear oil is greater than 12 levels, and the growth value of the kinematic viscosity at 100 °C in the oxidation stability test (121 °C, 312 h) is 1.2%, and the growth value of the sedimentation value is not more than 0.03 ml.

[0021] Example 2 (320 viscosity grade wind turbine gear oil) Set the outlet temperature of the heating pump to 50°C. The oil suction pump is connected to the main gearbox of the wind turbine generator. Start the oil suction pump. The wind power gear oil pumped out by the oil suction pump is heated by the heating pump and then flows through the vacuum dehydrating pump, impurity filter, on-line detection device, and additive replenishing device in sequence before flowing back to the main gearbox. When the on-line detection device detects that the moisture content of the gear oil is not more than trace and the cleanliness is not more than 8, start to detect the content of antioxidant T501, the content of phenolic or aromatic amine antioxidants, and the phosphorus content. The test results show that the content of T501 is 75% of that of the new oil, the residual phenolic antioxidant is 64.8% of that of the new oil, and the residual aromatic amine antioxidant is 90% of that of the new oil. According to the results, replenish 25% of T501, replenish 35.2% of L5135, and replenish 10% of T557. In addition, the detected phosphorus content is 70% of that of the new oil, and replenish 30% of the phosphorus-containing additive package (IR349:T309:IR353:T306:T323 = 0.6:1:1:4:1). After replenishment, the off-line detection of the wind power gear oil shows that FZG is greater than 12 levels, the growth value of the kinematic viscosity at 100°C in the oxidation stability test (121°C, 312 h) is 1.0%, and the growth value of the sedimentation value is not more than 0.04 ml.

[0022] Example 3 (Wind turbine generator gear oil with a viscosity grade of 220) Set the outlet temperature of the heating pump to 50°C. The oil suction pump is connected to the main gearbox of the wind turbine generator. Start the oil suction pump. The wind power gear oil pumped out by the oil suction pump is heated by the heating pump and then flows through the vacuum dehydrating pump, impurity filter, on-line detection device, and additive replenishing device in sequence before flowing back to the main gearbox. When the on-line detection device detects that the moisture content of the gear oil is not more than trace and the cleanliness is not more than 8, start to detect the content of antioxidant T501, the content of phenolic or aromatic amine antioxidants, and the phosphorus content. The test results show that the content of T501 is 70% of that of the new oil, the residual phenolic antioxidant is 51.4% of that of the new oil, and the residual aromatic amine antioxidant is 88% of that of the new oil. According to the results, replenish 30% of T501, replenish 48.6% of L107, and replenish 12% of T531. In addition, the detected phosphorus content is 75% of that of the new oil, and replenish 25% of the phosphorus-containing additive package (IR349:T309:T308:T306:T323 = 1:0.5:0.5:3:2). After replenishment, the off-line detection of the wind power gear oil shows that FZG is greater than 12 levels, the growth value of the kinematic viscosity at 100°C in the oxidation stability test (121°C, 312 h) is 0.8%, and the growth value of the sedimentation value is not more than 0.03 ml.

[0023] Example 4 (Wind turbine generator gear oil with a viscosity grade of 150) Set the outlet temperature of the heating pump to 50 °C. The oil suction pump is connected to the main gearbox of the wind turbine generator. Start the oil suction pump. After the wind power gear oil pumped out by the oil suction pump is heated by the heating pump, it flows through the vacuum water removal pump, impurity filter, on-line detection device, and additive replenishment device in sequence and then flows back to the main gearbox. When the on-line detection device detects that the water content of the gear oil is not greater than trace and the cleanliness is not greater than 8, start to detect the content of antioxidant T501, phenolic or aromatic amine antioxidants, and phosphorus content. The test results show that the content of T501 is 65% of the new oil, the residual phenolic antioxidant is 68.9% of the new oil, and the residual aromatic amine antioxidant is 85% of the new oil. According to the results, replenish 35% of T501, 31.1% of T508, and 15% of T534. In addition, the detected phosphorus content is 70% of the new oil, and replenish 30% of the phosphorus-containing additive package (IR349, T308, IR353, T306, T323 = 1:0.5:0.2:2:3). After replenishment, the offline detection of the wind power gear oil shows that FZG is greater than 12 levels, the growth value of the kinematic viscosity at 100 °C in the oxidation stability test (121 °C, 312 h) is 1.2%, and the growth value of the precipitation value is not greater than 0.05 ml.

[0024] Comparative Example 1 (wind turbine generator gear oil with viscosity grade 320) The difference from Example 1 is that the test results show that the content of T501 is 80% of the new oil, the residual phenolic antioxidant is 53.7% of the new oil, and the residual aromatic amine antioxidant is 98.8% of the new oil. According to the results, replenish 20% of T501 and 46.3% of L5135. The loss of aromatic amine antioxidants is very small and no replenishment is required. In addition, the detected phosphorus content is 80% of the new oil, and replenish 20% of the phosphorus-containing additive package (T309:IR353:T306:T323 = 1:0.5:2:2). After replenishment, the offline detection of the wind power gear oil shows that FZG is greater than 11 levels, the growth value of the kinematic viscosity at 100 °C in the oxidation stability test (121 °C, 312 h) is 1.3%, and the growth value of the precipitation value is not greater than 0.05 ml.

[0025] Comparative Example 2 (wind turbine generator gear oil with viscosity grade 320) The difference from Example 1 is that the test results show that the content of T501 is 80% of that of the new oil, the residual phenolic antioxidant is 53.7% of that of the new oil, and the residual aromatic amine antioxidant is 98.8% of that of the new oil. According to the results, 20% of T501 is added, and 46.3% of L5135 is added. The loss of aromatic amine antioxidants is very small and no addition is made. In addition, the detected phosphorus content is 80% of that of the new oil, and 20% of the phosphorus-containing additive package (T308:IR353:T306:T323 = 1:0.5:2:1) is added. After addition, the offline detection of the wind power gear oil shows that FZG is greater than 11 grades, the growth value of the kinematic viscosity at 100 °C in the oxidation stability test (121 °C, 312 h) is 1.2%, and the growth value of the sedimentation value is not more than 0.04 ml.

[0026] Comparative Example 3 (wind turbine gear oil with a viscosity grade of 320) The difference from Example 1 is that the test results show that the content of T501 is 80% of that of the new oil, the residual phenolic antioxidant is 53.7% of that of the new oil, and the residual aromatic amine antioxidant is 98.8% of that of the new oil. According to the results, 20% of T501 is added, and 46.3% of L5135 is added. The loss of aromatic amine antioxidants is very small and no addition is made. In addition, the detected phosphorus content is 80% of that of the new oil, and 20% of the phosphorus-containing additive package (T308:T309:T306:T323 = 1:1:1:1) is added. After addition, the offline detection of the wind power gear oil shows that FZG is greater than 11 grades, the growth value of the kinematic viscosity at 100 °C in the oxidation stability test (121 °C, 312 h) is 1.0%, and the growth value of the sedimentation value is not more than 0.05 ml.

[0027] Comparative Example 4 (wind turbine gear oil with a viscosity grade of 320) The difference from Example 1 is that the test results show that the content of T501 is 80% of that of the new oil, the residual phenolic antioxidant is 53.7% of that of the new oil, and the residual aromatic amine antioxidant is 98.8% of that of the new oil. According to the results, 20% of T501 is added, and 46.3% of L5135 is added. The loss of aromatic amine antioxidants is very small and no addition is made. In addition, the detected phosphorus content is 80% of that of the new oil, and 20% of the phosphorus-containing additive package (T308:T309:IR353:T323 = 0.4:1:0.2:1) is added. After addition, the offline detection of the wind power gear oil shows that FZG is greater than 11 grades, the growth value of the kinematic viscosity at 100 °C in the oxidation stability test (121 °C, 312 h) is 1.5%, and the growth value of the sedimentation value is not more than 0.05 ml.

[0028] Comparative Example 5 (wind turbine gear oil with a viscosity grade of 320) The difference from Example 1 is that the test results show that the content of T501 is 80% of that of the new oil, the residual phenolic antioxidant is 53.7% of that of the new oil, and the residual aromatic amine antioxidant is 98.8% of that of the new oil. According to the results, 20% of T501 is added, and 46.3% of L5135 is added. The loss of aromatic amine antioxidant is very small and no addition is required. In addition, the detected phosphorus content is 80% of that of the new oil, and 20% of the phosphorus-containing additive package (T308: T309: IR353: T306 = 1:1:1:2) is added. After addition, the offline detection of the wind power gear oil shows that FZG is greater than 11 levels, the growth value of the kinematic viscosity at 100 °C in the oxidation stability test (121 °C, 312 h) is 1.6%, and the growth value of the precipitation value is not greater than 0.05 ml.

[0029] Comparative Example 6 (wind turbine gear oil with a viscosity grade of 320) The difference from Example 1 is that the test results show that the content of T501 is 80% of that of the new oil, the residual phenolic antioxidant is 53.7% of that of the new oil, and the residual aromatic amine antioxidant is 98.8% of that of the new oil. According to the results, 20% of T501 is added, and 46.3% of L5135 is added. The loss of aromatic amine antioxidant is very small and no addition is required. In addition, the detected phosphorus content is 80% of that of the new oil, and 20% of the phosphorus-containing additive package (IR353: T306: T323 = 1:3:2) is added. After addition, the offline detection of the wind power gear oil shows that FZG is greater than 10 levels, the growth value of the kinematic viscosity at 100 °C in the oxidation stability test (121 °C, 312 h) is 1.5%, and the growth value of the precipitation value is not greater than 0.05 ml.

[0030] Comparative Example 7 (wind turbine gear oil with a viscosity grade of 320) The difference from Example 1 is that the test results show that the content of T501 is 80% of that of the new oil, the residual phenolic antioxidant is 53.7% of that of the new oil, and the residual aromatic amine antioxidant is 98.8% of that of the new oil. According to the results, 20% of T501 is added, and 46.3% of L5135 is added. The loss of aromatic amine antioxidant is very small and no addition is required. In addition, the detected phosphorus content is 80% of that of the new oil, and 20% of the phosphorus-containing additive package (T308: T309: IR353 = 1:1:0.5) is added. After addition, the offline detection of the wind power gear oil shows that FZG is greater than 10 levels, the growth value of the kinematic viscosity at 100 °C in the oxidation stability test (121 °C, 312 h) is 1.5%, and the growth value of the precipitation value is not greater than 0.05 ml.

[0031] Comparative Example 8 (wind turbine gear oil with a viscosity grade of 320) The differences from Example 2 are as follows: Start to detect the content of antioxidant T501, the content of phenolic antioxidants or aromatic amine antioxidants, and the phosphorus content. The test results show that the content of T501 is 75% of that of the new oil, the residual phenolic antioxidant is 64.8% of that of the new oil, and the residual aromatic amine antioxidant is 90% of that of the new oil. According to the results, 25% of T501 is added, 35.2% of L5135 is added, and 10% of T557 is added. In addition, the detected phosphorus content is 70% of that of the new oil, and 30% of a phosphorus-containing additive package (T309:IR353:T306:T323 = 1:0.5:2:1) is added. After the addition, the offline detection of the wind power gear oil shows that FZG is greater than 11 grades, the growth value of the kinematic viscosity at 100 °C in the oxidation stability test (121 °C, 312 h) is 1.5%, and the growth value of the sediment value is not more than 0.05 ml.

[0032] Comparative Example 9 (Wind turbine gear oil with a viscosity grade of 320) The differences from Example 2 are as follows: Start to detect the content of antioxidant T501, the content of phenolic antioxidants or aromatic amine antioxidants, and the phosphorus content. The test results show that the content of T501 is 75% of that of the new oil, the residual phenolic antioxidant is 64.8% of that of the new oil, and the residual aromatic amine antioxidant is 90% of that of the new oil. According to the results, 25% of T501 is added, 35.2% of L5135 is added, and 10% of T557 is added. In addition, the detected phosphorus content is 70% of that of the new oil, and 30% of a phosphorus-containing additive package (IR349, IR353, T306, T323 = 1:0.5:2:1) is added. After the addition, the offline detection of the wind power gear oil shows that FZG is greater than 11 grades, the growth value of the kinematic viscosity at 100 °C in the oxidation stability test (121 °C, 312 h) is 1.6%, and the growth value of the sediment value is not more than 0.05 ml.

[0033] Comparative Example 10 (Wind turbine gear oil with a viscosity grade of 320) The differences from Example 2 are as follows: Start to detect the content of antioxidant T501, the content of phenolic antioxidants or aromatic amine antioxidants, and the phosphorus content. The test results show that the content of T501 is 75% of that of the new oil, the residual phenolic antioxidant is 64.8% of that of the new oil, and the residual aromatic amine antioxidant is 90% of that of the new oil. According to the results, 25% of T501 is added, 35.2% of L5135 is added, and 10% of T557 is added. In addition, the detected phosphorus content is 70% of that of the new oil, and 30% of a phosphorus-containing additive package (IR349:T309:T306:T323 = 1:1:1:1) is added. After the addition, the offline detection of the wind power gear oil shows that FZG is greater than 11 grades, the growth value of the kinematic viscosity at 100 °C in the oxidation stability test (121 °C, 312 h) is 1.5%, and the growth value of the sediment value is not more than 0.05 ml.

[0034] Comparative Example 11 (Wind turbine gear oil with a viscosity grade of 320) The differences from Example 2 are as follows: Start to detect the content of antioxidant T501, the content of phenolic or aromatic amine antioxidants, and the phosphorus content. The test results show that the content of T501 is 75% of that of the new oil, the residual phenolic antioxidant is 64.8% of that of the new oil, and the residual aromatic amine antioxidant is 90% of that of the new oil. According to the results, 25% of T501 is added, 35.2% of L5135 is added, and 10% of T557 is added. In addition, the detected phosphorus content is 70% of that of the new oil, and 30% of the phosphorus-containing additive package (IR349:T309:IR353:T323 = 1:1:0.5:1) is added. After the addition, the offline detection of the wind power gear oil shows that FZG is greater than 11 grades, the growth value of the kinematic viscosity at 100 °C in the oxidation stability test (121 °C, 312 h) is 1.6%, and the growth value of the sedimentation value is not more than 0.05 ml.

[0035] Comparative Example 12 (wind turbine gear oil with a viscosity grade of 320) The differences from Example 2 are as follows: Start to detect the content of antioxidant T501, the content of phenolic or aromatic amine antioxidants, and the phosphorus content. The test results show that the content of T501 is 75% of that of the new oil, the residual phenolic antioxidant is 64.8% of that of the new oil, and the residual aromatic amine antioxidant is 90% of that of the new oil. According to the results, 25% of T501 is added, 35.2% of L5135 is added, and 10% of T557 is added. In addition, the detected phosphorus content is 70% of that of the new oil, and 30% of the phosphorus-containing additive package (IR349:T309:IR353:T306:T323 = 1:1:0.5:5:1) is added. After the addition, the offline detection of the wind power gear oil shows that FZG is greater than 11 grades, the growth value of the kinematic viscosity at 100 °C in the oxidation stability test (121 °C, 312 h) is 1.6%, and the growth value of the sedimentation value is not more than 0.05 ml.

[0036] Comparative Example 13 (wind turbine gear oil with a viscosity grade of 320) The differences from Example 2 are as follows: Start to detect the content of antioxidant T501, the content of phenolic or aromatic amine antioxidants, and the phosphorus content. The test results show that the content of T501 is 75% of that of the new oil, the residual phenolic antioxidant is 64.8% of that of the new oil, and the residual aromatic amine antioxidant is 90% of that of the new oil. According to the results, 25% of T501 is added, 35.2% of L5135 is added, and 10% of T557 is added. In addition, the detected phosphorus content is 70% of that of the new oil, and 30% of the phosphorus-containing additive package (IR349:T309:IR353 = 1:1:1) is added. After the addition, the offline detection of the wind power gear oil shows that FZG is greater than 10 grades, the growth value of the kinematic viscosity at 100 °C in the oxidation stability test (121 °C, 312 h) is 1.5%, and the growth value of the sedimentation value is not more than 0.05 ml.

[0037] Comparative Example 14 (wind turbine gear oil with a viscosity grade of 320) The differences from Example 2 are as follows: Detect the content of antioxidant T501, phenolic or aromatic amine antioxidants, and phosphorus content. The test results show that the content of T501 is 75% of that of the new oil, the residual phenolic antioxidant is 64.8% of that of the new oil, and the residual aromatic amine antioxidant is 90% of that of the new oil. According to the results, 25% of T501 is added, 35.2% of L5135 is added, and 10% of T557 is added. In addition, the detected phosphorus content is 70% of that of the new oil, and 30% of a phosphorus-containing additive package (IR353: T306: T323 = 1:3:2) is added. After the addition, the offline detection of the wind power gear oil shows that FZG is greater than 10 levels, the growth value of the kinematic viscosity at 100 °C in the oxidation stability test (121 °C, 312 h) is 1.3%, and the growth value of the sedimentation value is not more than 0.05 ml.

[0038] Comparative Example 15 (wind turbine gear oil with a viscosity grade of 220) The differences from Example 3 are as follows: The test results show that the content of T501 is 70% of that of the new oil, the residual phenolic antioxidant is 51.4% of that of the new oil, and the residual aromatic amine antioxidant is 88% of that of the new oil. According to the results, 30% of T501 is added, 48.6% of L107 is added, and 12% of T531 is added. In addition, the detected phosphorus content is 75% of that of the new oil, and 25% of a phosphorus-containing additive package (T309: T308: T306: T323 = 1:1:2:2) is added. After the addition, the offline detection of the wind power gear oil shows that FZG is greater than 11 levels, the growth value of the kinematic viscosity at 100 °C in the oxidation stability test (121 °C, 312 h) is 1.5%, and the growth value of the sedimentation value is not more than 0.05 ml.

[0039] Comparative Example 16 (wind turbine gear oil with a viscosity grade of 220) The differences from Example 3 are as follows: The test results show that the content of T501 is 70% of that of the new oil, the residual phenolic antioxidant is 51.4% of that of the new oil, and the residual aromatic amine antioxidant is 88% of that of the new oil. According to the results, 30% of T501 is added, 48.6% of L107 is added, and 12% of T531 is added. In addition, the detected phosphorus content is 75% of that of the new oil, and 25% of a phosphorus-containing additive package (IR349: T308: T306: T323 = 1:1:3:1) is added. After the addition, the offline detection of the wind power gear oil shows that FZG is greater than 11 levels, the growth value of the kinematic viscosity at 100 °C in the oxidation stability test (121 °C, 312 h) is 1.5%, and the growth value of the sedimentation value is not more than 0.05 ml.

[0040] Comparative Example 17 (wind turbine gear oil with a viscosity grade of 220) The differences from Example 3 are as follows: The test results show that the content of T501 is 70% of that of the new oil, the residual phenolic antioxidant is 51.4% of that of the new oil, and the residual aromatic amine antioxidant is 88% of that of the new oil. According to the results, 30% of T501 is added, 48.6% of L107 is added, and 12% of T531 is added. In addition, the detected phosphorus content is 75% of that of the new oil, and 25% of a phosphorus-containing additive package (IR349:T309:T306:T323 = 1:1:2:2) is added. After addition, the offline detection of the wind power gear oil shows that FZG is greater than 11 grades, the growth value of the kinematic viscosity at 100 °C in the oxidation stability test (121 °C, 312 h) is 1.5%, and the growth value of the sedimentation value is not more than 0.05 ml.

[0041] Comparative Example 18 (wind turbine gear oil with a viscosity grade of 220) The differences from Example 3 are as follows: The test results show that the content of T501 is 70% of that of the new oil, the residual phenolic antioxidant is 51.4% of that of the new oil, and the residual aromatic amine antioxidant is 88% of that of the new oil. According to the results, 30% of T501 is added, 48.6% of L107 is added, and 12% of T531 is added. In addition, the detected phosphorus content is 75% of that of the new oil, and 25% of a phosphorus-containing additive package (IR349:T309:T308:T323 = 1:0.5:1:2) is added. After addition, the offline detection of the wind power gear oil shows that FZG is greater than 11 grades, the growth value of the kinematic viscosity at 100 °C in the oxidation stability test (121 °C, 312 h) is 1.6%, and the growth value of the sedimentation value is not more than 0.05 ml.

[0042] Comparative Example 19 (wind turbine gear oil with a viscosity grade of 220) The differences from Example 3 are as follows: The test results show that the content of T501 is 70% of that of the new oil, the residual phenolic antioxidant is 51.4% of that of the new oil, and the residual aromatic amine antioxidant is 88% of that of the new oil. According to the results, 30% of T501 is added, 48.6% of L107 is added, and 12% of T531 is added. In addition, the detected phosphorus content is 75% of that of the new oil, and 25% of a phosphorus-containing additive package (IR349:T309:T308:T306 = 1:1:1:1) is added. After addition, the offline detection of the wind power gear oil shows that FZG is greater than 11 grades, the growth value of the kinematic viscosity at 100 °C in the oxidation stability test (121 °C, 312 h) is 1.5%, and the growth value of the sedimentation value is not more than 0.05 ml.

[0043] Comparative Example 20 (wind turbine gear oil with a viscosity grade of 220) The difference from Example 3 is as follows: The test results show that the content of T501 is 70% of that of the new oil, the residual phenolic antioxidant is 51.4% of that of the new oil, and the residual aromatic amine antioxidant is 88% of that of the new oil. According to the results, 30% of T501 is added, 48.6% of L107 is added, and 12% of T531 is added. In addition, the detected phosphorus content is 75% of that of the new oil, and 25% of the phosphorus-containing additive package (IR349: T309: T308 = 1:1:1) is added. After the addition, the offline detection of the wind power gear oil shows that FZG is greater than 10 grades, the growth value of the kinematic viscosity at 100 °C in the oxidation stability test (121 °C, 312 h) is 1.5%, and the growth value of the sedimentation value is not more than 0.05 ml.

[0044] Comparative Example 21 (wind turbine gear oil with a viscosity grade of 220) The difference from Example 3 is as follows: The test results show that the content of T501 is 70% of that of the new oil, the residual phenolic antioxidant is 51.4% of that of the new oil, and the residual aromatic amine antioxidant is 88% of that of the new oil. According to the results, 30% of T501 is added, 48.6% of L107 is added, and 12% of T531 is added. In addition, the detected phosphorus content is 75% of that of the new oil, and 25% of the phosphorus-containing additive package (T308: T306: T323 = 1:2:2) is added. After the addition, the offline detection of the wind power gear oil shows that FZG is greater than 10 grades, the growth value of the kinematic viscosity at 100 °C in the oxidation stability test (121 °C, 312 h) is 1.6%, and the growth value of the sedimentation value is not more than 0.05 ml.

[0045] Comparative Example 22 (wind turbine gear oil with a viscosity grade of 150) The difference from Example 4 is as follows: The test results show that the content of T501 is 65% of that of the new oil, the residual phenolic antioxidant is 68.9% of that of the new oil, and the residual aromatic amine antioxidant is 85% of that of the new oil. According to the results, 35% of T501 is added, 31.1% of T508 is added, and 15% of T534 is added. In addition, the detected phosphorus content is 70% of that of the new oil, and 30% of the phosphorus-containing additive package (T308: IR353: T306: T323 = 1:1:3:2) is added. After the addition, the offline detection of the wind power gear oil shows that FZG is greater than 11 grades, the growth value of the kinematic viscosity at 100 °C in the oxidation stability test (121 °C, 312 h) is 1.5%, and the growth value of the sedimentation value is not more than 0.05 ml.

[0046] Comparative Example 23 (wind turbine gear oil with a viscosity grade of 150) The difference from Example 4 is as follows: The test results show that the content of T501 is 65% of that of the new oil, the residual phenolic antioxidant is 68.9% of that of the new oil, and the residual aromatic amine antioxidant is 85% of that of the new oil. According to the results, 35% of T501, 31.1% of T508, and 15% of T534 are added. In addition, the detected phosphorus content is 70% of that of the new oil, and 30% of the phosphorus-containing additive package (IR349:IR353:T306:T323 = 1:1:3:1) is added. After addition, the offline detection of the wind power gear oil shows that FZG is greater than 11 grades, the growth value of the kinematic viscosity at 100 °C in the oxidation stability test (121 °C, 312 h) is 1.5%, and the growth value of the precipitation value is not more than 0.05 ml.

[0047] Comparative Example 24 (150 viscosity grade wind turbine gear oil) The difference from Example 4 is as follows: The test results show that the content of T501 is 65% of that of the new oil, the residual phenolic antioxidant is 68.9% of that of the new oil, and the residual aromatic amine antioxidant is 85% of that of the new oil. According to the results, 35% of T501, 31.1% of T508, and 15% of T534 are added. In addition, the detected phosphorus content is 70% of that of the new oil, and 30% of the phosphorus-containing additive package (IR349:T308:T306:T323 = 1:1:3:3) is added. After addition, the offline detection of the wind power gear oil shows that FZG is greater than 11 grades, the growth value of the kinematic viscosity at 100 °C in the oxidation stability test (121 °C, 312 h) is 1.6%, and the growth value of the precipitation value is not more than 0.05 ml.

[0048] Comparative Example 25 (150 viscosity grade wind turbine gear oil) The difference from Example 4 is as follows: The test results show that the content of T501 is 65% of that of the new oil, the residual phenolic antioxidant is 68.9% of that of the new oil, and the residual aromatic amine antioxidant is 85% of that of the new oil. According to the results, 35% of T501, 31.1% of T508, and 15% of T534 are added. In addition, the detected phosphorus content is 70% of that of the new oil, and 30% of the phosphorus-containing additive package (IR349:T308:IR353:T323 = 1:1:0.5:3) is added. After addition, the offline detection of the wind power gear oil shows that FZG is greater than 11 grades, the growth value of the kinematic viscosity at 100 °C in the oxidation stability test (121 °C, 312 h) is 1.5%, and the growth value of the precipitation value is not more than 0.05 ml.

[0049] Comparative Example 26 (150 viscosity grade wind turbine gear oil) The differences from Example 4 are as follows: The test results show that the content of T501 is 65% of that of the new oil, the residual phenolic antioxidant is 68.9% of that of the new oil, and the residual aromatic amine antioxidant is 85% of that of the new oil. According to the results, 35% of T501 is added, 31.1% of T508 is added, and 15% of T534 is added. In addition, the detected phosphorus content is 70% of that of the new oil, and 30% of the phosphorus-containing additive package (IR349:T308:IR353:T306 = 1:1:0.5:4) is added. After the addition, the offline detection of the wind power gear oil shows that the FZG is greater than 11 grades, the increase value of the kinematic viscosity at 100 °C in the oxidation stability test (121 °C, 312 h) is 1.6%, and the increase value of the precipitation value is not more than 0.05 ml.

[0050] Comparative Example 27 (wind turbine gear oil with a viscosity grade of 150) The differences from Example 4 are as follows: The test results show that the content of T501 is 65% of that of the new oil, the residual phenolic antioxidant is 68.9% of that of the new oil, and the residual aromatic amine antioxidant is 85% of that of the new oil. According to the results, 35% of T501 is added, 31.1% of T508 is added, and 15% of T534 is added. In addition, the detected phosphorus content is 70% of that of the new oil, and 30% of the phosphorus-containing additive package (IR349:T308:IR353 = 1:1:1) is added. After the addition, the offline detection of the wind power gear oil shows that the FZG is greater than 10 grades, the increase value of the kinematic viscosity at 100 °C in the oxidation stability test (121 °C, 312 h) is 1.5%, and the increase value of the precipitation value is not more than 0.05 ml.

[0051] Comparative Example 28 (wind turbine gear oil with a viscosity grade of 150) The differences from Example 4 are as follows: The test results show that the content of T501 is 65% of that of the new oil, the residual phenolic antioxidant is 68.9% of that of the new oil, and the residual aromatic amine antioxidant is 85% of that of the new oil. According to the results, 35% of T501 is added, 31.1% of T508 is added, and 15% of T534 is added. In addition, the detected phosphorus content is 70% of that of the new oil, and 30% of the phosphorus-containing additive package (IR353:T306:T323 = 1:3:1) is added. After the addition, the offline detection of the wind power gear oil shows that the FZG is greater than 10 grades, the increase value of the kinematic viscosity at 100 °C in the oxidation stability test (121 °C, 312 h) is 1.6%, and the increase value of the precipitation value is not more than 0.05 ml.

[0052] T501 is a commonly used low-temperature antioxidant in industrial gear oils including wind turbine gear oils (it has better effects at temperatures below 100 °C). This additive has excellent synergistic antioxidant effects with phenolic ester antioxidants (high-temperature antioxidants L107\L5135\T508) and amine antioxidants (high-temperature antioxidants T531\T534\T557).

[0053] Phosphorus-containing extreme pressure and anti-wear agents have good anti-wear performance. The combined use of phosphorus-containing extreme pressure and anti-wear agents with different activities can produce excellent synergistic anti-wear effects, improving anti-wear durability and enhancing anti-micro-pitting performance. The phosphorus-containing extreme pressure and anti-wear agents with higher activity include T308, IR349, and IR353. The phosphorus-containing extreme pressure and anti-wear agents with lower activity include T306, T309, and T323.

[0054] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A method for on-site recycling and reuse of wind turbine gear oil, characterized in that: It includes the following steps: S1: Recycle the wind turbine gear oil on-site, detect the contents of hindered phenol antioxidants, aromatic amine antioxidants, and phosphorus, and obtain the detection results; S2: Supplement the hindered phenol antioxidants, aromatic amine antioxidants, and phosphorus-containing extreme pressure anti-wear agents according to the detection results in step 1.

2. The on-site recycling method of the gear oil of a wind turbine according to claim 1, characterized in that: The on-site recycling of the wind turbine gear oil in step S1 includes connecting an oil suction pump to the main gearbox of the wind turbine, starting the oil suction pump. After the wind power gear oil pumped out by the oil suction pump is heated, dehydrated in vacuum, then filtered for impurities and on-line detected, and the contents of hindered phenol antioxidants and aromatic amine antioxidants in the wind turbine gear oil are detected by an on-line detection device.

3. A method for on-site recycling and reuse of wind turbine gear oil according to claim 2, characterized in that: The heating temperature of the wind power gear oil pumped out by the oil suction pump is 45 - 50 °C.

4. A method for on-site recycling and reuse of wind turbine gear oil according to claim 2, characterized in that: In the impurity filtration, particles larger than 3 μm are filtered out, and the cleanliness needs to meet not greater than grade 8.

5. A method for on-site recycling and reuse of wind turbine gear oil according to claim 1, characterized in that: The phosphorus-containing extreme pressure anti-wear agent in step S2 includes one or more of acidic phosphoric acid ester amine, triphenyl thiophosphate, tricresyl phosphate, amino thiocarbamate, phosphoric acid amine mixture, and dialkyl dithiophosphate.

6. A method for on-site recycling and reuse of wind turbine gear oil according to claim 1, characterized in that: In step S2, the phosphorus-containing extreme pressure anti-wear agent is selected according to the viscosity grade of the wind turbine gear oil.

7. A method for on-site recycling and reuse of wind turbine gear oil according to claim 6, characterized in that: If the viscosity grade of the wind turbine gear oil is 320, the phosphorus-containing extreme pressure anti-wear agent is triphenyl thiophosphate, dialkyl dithiophosphate, tricresyl phosphate, amino thiocarbamate, and includes one of acidic phosphoric acid ester amine salt or phosphoric acid amine mixture; If the viscosity grade of the wind turbine gear oil is 220, the phosphorus-containing extreme pressure anti-wear agent is phosphoric acid amine mixture, triphenyl thiophosphate, acidic phosphoric acid ester amine salt, tricresyl phosphate, amino thiocarbamate; If the viscosity grade of the wind turbine gear oil is 150, the phosphorus-containing extreme pressure anti-wear agent is phosphoric acid amine mixture, acidic phosphoric acid ester amine salt, dialkyl dithiophosphate, tricresyl phosphate, amino thiocarbamate.

8. A method for on-site recycling and reuse of wind turbine gear oil according to claim 1, characterized in that: The hindered phenol antioxidants include one or two mixtures of high molecular weight phenol antioxidants, high molecular weight hindered phenol antioxidants, and phenol ester type antioxidants.

9. A method for on-site recycling and reuse of wind turbine gear oil according to claim 1, characterized in that: The aromatic amine antioxidants include one or two mixtures of N-phenyl-α-naphthylamine, alkyl diphenylamine, and octyl / butyl diphenylamine.