A kind of anti-rust and anticorrosive turbine oil for hydroelectric power generation

Abstract

The application discloses a kind of anti-rust and anticorrosion turbine oil for hydroelectric power generation, it relates to turbine oil technical field, comprising the following weight percentage of components: extreme pressure antiwear agent 1-5%, antioxidant 0.5-3%, rust inhibitor 0.5-3%, antiemulsifying agent 0.1-0.5%, pour depressant 0.1-0.5%, defoaming agent 0.01-0.05%, the balance is base oil;The turbine oil provided by the application has suitable viscosity, excellent rust resistance and anticorrosion, and good viscosity-temperature property, pressure resistance and wear resistance, oxidation resistance, emulsion resistance, foam resistance and the like, can play outstanding lubricating effect, cooling effect and speed regulating effect, reduce the wear of turbine parts, prolong the service life of turbine parts.

Description

Technical field:

[0001] The present invention relates to the technical field of turbine oils, in particular to a rust-proof and corrosion-resistant turbine oil for hydropower generation. Background technology:

[0002] Turbine oil, also known as turbine oil or steam turbine oil, is primarily used in power plant steam turbines, hydro-generators, and other applications requiring a highly refined lubricant. Turbine oil differs from other lubricants primarily in its superior oxidation stability and demulsification properties. It is well-suited for high-speed machinery, primarily providing lubrication, heat dissipation, and cooling.

[0003] Rust and corrosion resistance refers to the ability of turbine oil to form a protective film on metal surfaces using its low surface tension, preventing air and moisture from coming into contact with the metal, thereby preventing rust and corrosion of metal parts. If the turbine oil's rust and corrosion resistance is poor, rust and corrosion on the metal surface will directly affect the normal operation of the turbine. Summary of the invention:

[0004] The technical problem to be solved by the present invention is to provide a rust-proof and corrosion-resistant turbine oil for hydropower generation, wherein the rust-proof and anti-emulsification properties of the turbine oil are enhanced by adding appropriate amounts of rust inhibitors and anti-emulsifiers, while the preparation cost of the turbine oil is controlled, thereby facilitating the promotion and application of the turbine oil.

[0005] The technical problem to be solved by the present invention is achieved by adopting the following technical solutions:

[0006] One of the objects of the present invention is to provide a rust-proof and corrosion-resistant turbine oil for hydropower generation, comprising the following components in percentage by weight:

[0007]

[0008]

[0009] The balance is base oil.

[0010] Preferably, the base oil is a polyalphaolefin base oil. Polyalphaolefin base oil is classified as a synthetic base oil and has the widest application range. It has excellent viscosity-temperature performance and low-temperature fluidity, as well as good oxidation stability, thermal stability, and hydrolysis stability.

[0011] Preferably, the extreme pressure anti-wear agent is one or a combination of olefin sulfide, phosphate ester, phosphite, and thiophosphate amine salt. Extreme pressure anti-wear agents are additives that prevent sintering, scratching, and wear on sliding metal surfaces under extreme pressure conditions, thereby improving the load-bearing capacity of turbine oil.

[0012] Preferably, the antioxidant is one or a combination of phenolic antioxidants and amine antioxidants. The function of the antioxidant is to prevent the turbine oil from oxidative deterioration, especially to improve the high-temperature oxidation resistance of the turbine oil.

[0013] More preferably, the phenolic antioxidant is one or a combination of 2,6-di-tert-butyl-p-cresol, 2,6-di-tert-butylphenol, bis(3,5-di-tert-butyl-4-hydroxybenzyl) sulfide, and 4,4′-thiobis(3-methyl-6-tert-butylphenol).

[0014] More preferably, the amine antioxidant is an alkyl diphenylamine, including butyl diphenylamine, dibutyl diphenylamine, octyl diphenylamine, dioctyl diphenylamine, etc.

[0015] Preferably, the rust inhibitor is one or a combination of alkenyl succinic acid, alkenyl succinates, barium petroleum sulfonate, and sodium petroleum sulfonate. The polar groups in the rust inhibitor molecules have a strong adsorption force on metal surfaces, forming a tight monomolecular or multimolecular protective layer on the metal surface, preventing corrosive media from contacting the metal parts, thereby achieving a rust-proof effect.

[0016] Preferably, the demulsifier is a copolymer of ethylene oxide and propylene oxide with an average molecular weight of 4,000 to 6,000. Demulsibility is the ability of turbine oil to resist mixing with water to form an emulsion and is a very important physical and chemical property of turbine oil. During use, turbine oil inevitably mixes with some cooling water. If the turbine oil has poor demulsibility, the mixed water will cause the oil to emulsify, accelerate oxidation of the turbine oil, increase the acid value, and produce more oxidized deposits, which may cause poor lubrication.

[0017] Preferably, the pour point depressant is polymethacrylate. The pour point depressant lowers the freezing point of turbine oil and improves the low-temperature fluidity of turbine oil, so it is also called a low-temperature flow improver.

[0018] Preferably, the defoamer is a silicone defoamer, a polyacrylate defoamer, or a combination thereof. The defoamer eliminates foam in the turbine oil, as the presence of foam can affect the fluidity of the turbine oil and reduce its lubrication and cooling properties.

[0019] The second object of the present invention is to provide a method for preparing the demulsifier, comprising adding tert-butyldiethanolamine and potassium hydroxide to a reaction kettle, evacuating the reaction kettle and replacing the reaction kettle with nitrogen, heating the reaction kettle for dehydration, then introducing ethylene oxide and propylene oxide, and carrying out copolymerization at a pressure of 0.3 to 0.35 MPa and a temperature of 110 to 120° C. After the reaction, the reaction kettle is neutralized with glacial acetic acid to a neutral state, and the reaction kettle is dehydrated and discharged to obtain a copolymer of ethylene oxide and propylene oxide.

[0020] Preferably, the mass ratio of the tert-butyl diethanolamine, ethylene oxide and propylene oxide is 1:4:6; and the amount of the potassium hydroxide used is 0.25% of the total mass of the tert-butyl diethanolamine, ethylene oxide and propylene oxide.

[0021] The present invention uses tert-butyl diethanolamine as an initiator. Compared with commonly used propylene glycol and glycerol, the copolymer of ethylene oxide and propylene oxide prepared by the present invention has better anti-emulsification performance.

[0022] The beneficial effects of the present invention are as follows: the turbine oil provided by the present invention has suitable viscosity, excellent rust resistance and corrosion resistance, as well as good viscosity-temperature properties, pressure resistance and wear resistance, oxidation resistance, anti-emulsification, anti-foaming properties, etc., and can play an outstanding lubricating, cooling and speed regulating role, reduce the wear of turbine components, and extend the service life of turbine components. Specific implementation method:

[0023] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific embodiments.

[0024] The polyα-olefin base oil in the following examples and comparative examples consists of a low-viscosity polyα-olefin base oil PAO6 and a high-viscosity polyα-olefin base oil PAO40 in a mass ratio of 1:3.

[0025] Example 1

[0026] Prepare turbine oil according to the following composition:

[0027]

[0028]

[0029] The preparation method of the copolymer of ethylene oxide and propylene oxide is as follows: tert-butyl diethanolamine and potassium hydroxide are added to a reactor, vacuumed and replaced with nitrogen, heated for dehydration, and then ethylene oxide and propylene oxide are introduced, wherein the mass ratio of tert-butyl diethanolamine, ethylene oxide and propylene oxide is 1:4:6, and the amount of potassium hydroxide is 0.25% of the total mass of tert-butyl diethanolamine, ethylene oxide and propylene oxide. The copolymerization reaction is carried out at a pressure of 0.35 MPa and a temperature of 115° C. After the reaction is completed, the reaction is neutralized with glacial acetic acid to neutrality, and the reaction is discharged after dehydration to obtain a copolymer of ethylene oxide and propylene oxide with an average molecular weight of 5218.

[0030] Example 2

[0031] Prepare turbine oil according to the following composition:

[0032] raw material Weight percentage / % Polyalphaolefin base oil 91.25 T321 Sulfurized Isobutylene 4 2,6-di-tert-butyl-p-cresol 2.5 Barium petroleum sulfonate 1.5 Copolymer of ethylene oxide and propylene oxide 0.4 T602 polymethacrylate 0.3 Dimethicone 0.05

[0033] The preparation method of the copolymer of ethylene oxide and propylene oxide is as follows: tert-butyl diethanolamine and potassium hydroxide are added to a reactor, vacuumed and replaced with nitrogen, heated for dehydration, and then ethylene oxide and propylene oxide are introduced, wherein the mass ratio of tert-butyl diethanolamine, ethylene oxide and propylene oxide is 1:4:6, and the amount of potassium hydroxide is 0.25% of the total mass of tert-butyl diethanolamine, ethylene oxide and propylene oxide. The copolymerization reaction is carried out at a pressure of 0.35 MPa and a temperature of 110° C. After the reaction is completed, the reaction is neutralized with glacial acetic acid to neutrality, and the reaction is discharged after dehydration to obtain a copolymer of ethylene oxide and propylene oxide with an average molecular weight of 5430.

[0034] Example 3

[0035] Prepare turbine oil according to the following composition:

[0036]

[0037]

[0038] The preparation method of the copolymer of ethylene oxide and propylene oxide is as follows: tert-butyl diethanolamine and potassium hydroxide are added to a reactor, vacuumed and replaced with nitrogen, heated for dehydration, and then ethylene oxide and propylene oxide are introduced, wherein the mass ratio of tert-butyl diethanolamine, ethylene oxide and propylene oxide is 1:4:6, and the amount of potassium hydroxide is 0.25% of the total mass of tert-butyl diethanolamine, ethylene oxide and propylene oxide. The copolymerization reaction is carried out at a pressure of 0.3 MPa and a temperature of 120° C. After the reaction is completed, the reaction is neutralized with glacial acetic acid to neutrality, and the reaction is discharged after dehydration to obtain a copolymer of ethylene oxide and propylene oxide with an average molecular weight of 5019.

[0039] Example 4

[0040] Prepare turbine oil according to the following composition:

[0041] raw material Weight percentage / % Polyalphaolefin base oil 92.28 Di-n-butyl phosphite 3.5 Butyldiphenylamine 1.5 Barium petroleum sulfonate 2 Copolymer of ethylene oxide and propylene oxide 0.4 T602 polymethacrylate 0.3 Dimethicone 0.02

[0042] The preparation method of the copolymer of ethylene oxide and propylene oxide is as follows: tert-butyl diethanolamine and potassium hydroxide are added to a reactor, vacuumed and replaced with nitrogen, heated for dehydration, and then ethylene oxide and propylene oxide are introduced, wherein the mass ratio of tert-butyl diethanolamine, ethylene oxide and propylene oxide is 1:4:6, and the amount of potassium hydroxide is 0.25% of the total mass of tert-butyl diethanolamine, ethylene oxide and propylene oxide. The copolymerization reaction is carried out at a pressure of 0.35 MPa and a temperature of 115° C. After the reaction is completed, the reaction is neutralized with glacial acetic acid to neutrality, and the reaction is discharged after dehydration to obtain a copolymer of ethylene oxide and propylene oxide with an average molecular weight of 4863.

[0043] Example 5

[0044] Prepare turbine oil according to the following composition:

[0045] raw material Weight percentage / % Polyalphaolefin base oil 90.07 Di-n-butyl phosphite 4 2,6-di-tert-butyl-p-cresol+butyldiphenylamine 2.5 Dodecenylsuccinic acid 2.5 Copolymer of ethylene oxide and propylene oxide 0.5 T602 polymethacrylate 0.4 Dimethicone 0.03

[0046] The preparation method of the copolymer of ethylene oxide and propylene oxide is as follows: tert-butyl diethanolamine and potassium hydroxide are added to a reactor, vacuumed and replaced with nitrogen, heated for dehydration, and then ethylene oxide and propylene oxide are introduced, wherein the mass ratio of tert-butyl diethanolamine, ethylene oxide and propylene oxide is 1:4:6, and the amount of potassium hydroxide is 0.25% of the total mass of tert-butyl diethanolamine, ethylene oxide and propylene oxide. The copolymerization reaction is carried out at a pressure of 0.3 MPa and a temperature of 115° C. After the reaction is completed, the mixture is neutralized with glacial acetic acid to neutrality, and the mixture is discharged after dehydration to obtain a copolymer of ethylene oxide and propylene oxide with an average molecular weight of 4582.

[0047] Comparative Example 1

[0048] The difference between Comparative Example 1 and Example 1 is that the copolymer of ethylene oxide and propylene oxide is prepared by the following method, that is, tert-butyldiethanolamine in Example 1 is replaced by 1,2-propylene glycol.

[0049] Prepare turbine oil according to the following composition:

[0050] raw material Weight percentage / % Polyalphaolefin base oil 90.05 T321 Sulfurized Isobutylene 5 2,6-di-tert-butyl-p-cresol 2 Dodecenylsuccinic acid 2 Copolymer of ethylene oxide and propylene oxide 0.5 T602 polymethacrylate 0.4 Dimethicone 0.05

[0051] The preparation method of the copolymer of ethylene oxide and propylene oxide is as follows: 1,2-propylene glycol and potassium hydroxide are added to a reactor, vacuumed and replaced with nitrogen, heated for dehydration, and then ethylene oxide and propylene oxide are introduced, wherein the mass ratio of 1,2-propylene glycol, ethylene oxide and propylene oxide is 1:4:6, and the amount of potassium hydroxide is 0.25% of the total mass of 1,2-propylene glycol, ethylene oxide and propylene oxide. The copolymerization reaction is carried out at a pressure of 0.35 MPa and a temperature of 115° C. After the reaction is completed, the mixture is neutralized to neutrality with glacial acetic acid, dehydrated and discharged to obtain a copolymer of ethylene oxide and propylene oxide with an average molecular weight of 5507.

[0052] Comparative Example 2

[0053] The difference between Comparative Example 2 and Example 1 is that the copolymer of ethylene oxide and propylene oxide is prepared by the following method, that is, tert-butyl diethanolamine in Example 1 is replaced by glycerol.

[0054] Prepare turbine oil according to the following composition:

[0055] raw material Weight percentage / % Polyalphaolefin base oil 90.05 T321 Sulfurized Isobutylene 5 2,6-di-tert-butyl-p-cresol 2 Dodecenylsuccinic acid 2 Copolymer of ethylene oxide and propylene oxide 0.5 T602 polymethacrylate 0.4 Dimethicone 0.05

[0056] The preparation method of the copolymer of ethylene oxide and propylene oxide is as follows: glycerol and potassium hydroxide are added to a reactor, vacuumed and replaced with nitrogen, heated for dehydration, and then ethylene oxide and propylene oxide are introduced, wherein the mass ratio of glycerol, ethylene oxide and propylene oxide is 1:4:6, and the amount of potassium hydroxide is 0.25% of the total mass of glycerol, ethylene oxide and propylene oxide. The copolymerization reaction is carried out at a pressure of 0.35 MPa and a temperature of 115° C. After the reaction is completed, the copolymer is neutralized with glacial acetic acid to neutrality, and the product is discharged after dehydration to obtain a copolymer of ethylene oxide and propylene oxide with an average molecular weight of 5318.

[0057] Comparative Example 3

[0058] The difference between Comparative Example 3 and Example 1 is that the copolymer of ethylene oxide and propylene oxide is prepared by the following method, that is, tert-butyldiethanolamine in Example 1 is replaced by diethanolamine.

[0059] Prepare turbine oil according to the following composition:

[0060]

[0061]

[0062] The preparation method of the copolymer of ethylene oxide and propylene oxide comprises the following steps: adding diethanolamine and potassium hydroxide to a reaction kettle, evacuating the reactor and displacing the reactor with nitrogen, heating the reactor for dehydration, then introducing ethylene oxide and propylene oxide, wherein the mass ratio of diethanolamine, ethylene oxide and propylene oxide is 1:4:6, and the amount of potassium hydroxide used is 0.25% of the total mass of diethanolamine, ethylene oxide and propylene oxide, and conducting a copolymerization reaction at a pressure of 0.35 MPa and a temperature of 115° C. After the reaction is completed, the reactor is neutralized with glacial acetic acid to neutrality, and the reactor is dehydrated and discharged to obtain a copolymer of ethylene oxide and propylene oxide with an average molecular weight of 5149.

[0063] Comparative Example 4

[0064] The difference between Comparative Example 4 and Example 1 is that the copolymer of ethylene oxide and propylene oxide is prepared by the following method, that is, tert-butyldiethanolamine in Example 1 is replaced by triethanolamine.

[0065] Prepare turbine oil according to the following composition:

[0066] raw material Weight percentage / % Polyalphaolefin base oil 90.05 T321 Sulfurized Isobutylene 5 2,6-di-tert-butyl-p-cresol 2 Dodecenylsuccinic acid 2 Copolymer of ethylene oxide and propylene oxide 0.5 T602 polymethacrylate 0.4 Dimethicone 0.05

[0067] The preparation method of the copolymer of ethylene oxide and propylene oxide is as follows: triethanolamine and potassium hydroxide are added to a reactor, vacuumed and replaced with nitrogen, heated for dehydration, and then ethylene oxide and propylene oxide are introduced, wherein the mass ratio of triethanolamine, ethylene oxide and propylene oxide is 1:4:6, and the amount of potassium hydroxide is 0.25% of the total mass of triethanolamine, ethylene oxide and propylene oxide. The copolymerization reaction is carried out at a pressure of 0.35 MPa and a temperature of 115° C. After the reaction is completed, the copolymer is neutralized with glacial acetic acid to neutrality, and the product is discharged after dehydration to obtain a copolymer of ethylene oxide and propylene oxide with an average molecular weight of 5604.

[0068] Typical physical and chemical indicators of the turbine oil prepared in the above embodiment were tested, and the results are shown in Table 1.

[0069] Table 1 Typical physical and chemical indicators of turbine oil

[0070]

[0071] The demulsification properties (54° C.) of the turbine oils prepared in the above examples and comparative examples were tested with reference to the standard GB / T 7305-2003 “Determination of water separability of petroleum and synthetic fluids”. The results are shown in Table 2.

[0072] Table 2 Anti-emulsification properties of turbine oil

[0073] Complete separation time (min) Example 1 10 Example 2 10 Example 3 10 Example 4 10 Example 5 10 Comparative Example 1 15 Comparative Example 2 15 Comparative Example 3 15 Comparative Example 4 15

[0074] It can be seen from Table 2 that the selection of different initiators will cause the prepared copolymers of ethylene oxide and propylene oxide to exhibit different degrees of anti-emulsification properties.

[0075] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A rust-proof and corrosion-resistant turbine oil for hydropower generation, characterized in that: The composition comprises the following components in weight percentage: The demulsifier is a copolymer of ethylene oxide and propylene oxide with an average molecular weight of 4000 to 6000; The preparation method of the demulsifier comprises the following steps: adding tert-butyldiethanolamine and potassium hydroxide into a reaction kettle, evacuating the mixture and replacing the mixture with nitrogen, heating the mixture for dehydration, then introducing ethylene oxide and propylene oxide, and carrying out copolymerization reaction at a pressure of 0.3-0.35 MPa and a temperature of 110-120° C. After the reaction is completed, the mixture is neutralized with glacial acetic acid to neutrality, and the mixture is discharged after dehydration to obtain a copolymer of ethylene oxide and propylene oxide.

2. The rust-proof and corrosion-resistant turbine oil for hydropower generation according to claim 1, characterized in that: The base oil is a polyalphaolefin base oil.

3. The rust-proof and corrosion-resistant turbine oil for hydropower generation according to claim 1, characterized in that: The extreme pressure anti-wear agent is one or a combination of sulfided olefins, phosphates, phosphites, and thiophosphate amine salts.

4. The rust-proof and corrosion-resistant turbine oil for hydropower generation according to claim 1, characterized in that: The antioxidant is one of a phenolic antioxidant and an amine antioxidant, or a combination of both.

5. The rust-proof and corrosion-resistant turbine oil for hydropower generation according to claim 4, characterized in that: The phenolic antioxidant is one or a combination of 2,6-di-tert-butyl-p-cresol, 2,6-di-tert-butylphenol, bis(3,5-di-tert-butyl-4-hydroxybenzyl) sulfide, and 4,4'-thiobis(3-methyl-6-tert-butylphenol).

6. The rust-proof and corrosion-resistant turbine oil for hydroelectric power generation according to claim 4, characterized in that: The amine antioxidant is alkyl diphenylamine.

7. The rust- and corrosion-resistant turbine oil for hydroelectric power generation according to claim 1, characterized in that: The rust preventive agent is one of alkenyl succinic acid, alkenyl succinate, barium petroleum sulfonate, and sodium petroleum sulfonate, or a combination thereof.

8. The rust- and corrosion-resistant turbine oil for hydroelectric power generation according to claim 1, wherein: The pour point depressant is polymethacrylate.

9. The rust-proof and corrosion-resistant turbine oil for hydroelectric power generation according to claim 1, characterized in that: The defoaming agent is one of a silicone defoaming agent and a polyacrylate defoaming agent, or a combination of the two.

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