阅读说明：本技术 涡轮机油组合物及其用途 (Turbine oil composition and use thereof ) 是由 谢文秀 益梅蓉 何晓瑛 周霞 巩亚 韩旭燕 于 2019-03-22 设计创作，主要内容包括：本发明涉及一种涡轮机油组合物及其用途,所述组合物以重量份数计包括：抗氧剂10～30份、金属钝化剂3～5份、防锈剂3～6份、分散剂1～5份、破乳剂0.5～2份、抗泡剂0.001～0.005份、降凝剂0.01～0.2份、基础油余量。本发明能够有效改进涡轮机油的低温流动性且不影响油品的过滤性能。(The invention relates to a turbine oil composition and use thereof, the composition comprising, in parts by weight: 10-30 parts of antioxidant, 3-5 parts of metal deactivator, 3-6 parts of antirust agent, 1-5 parts of dispersant, 0.5-2 parts of demulsifier, 0.001-0.005 part of antifoaming agent, 0.01-0.2 part of pour point depressant and the balance of base oil. The invention can effectively improve the low-temperature fluidity of the turbine oil without influencing the filtering performance of oil products.)

1. A turbine oil composition comprising, in parts by weight: 10-30 parts of an antioxidant, 3-5 parts of a metal deactivator, 3-6 parts of an antirust agent, 1-5 parts of a dispersant, 0.5-2 parts of a demulsifier, 0.001-0.005 part of an antifoaming agent, 0.01-0.2 part of a pour point depressant and the balance of base oil; wherein the content of the first and second substances,

the antioxidant is a mixture of 2, 6-di-tert-butylphenol-alpha-dimethylamino-p-cresol and (3, 5-di-tert-butyl-4-hydroxy-tolyl) - (acetate) -thioether;

the metal passivator is at least one of indole derivatives, benzotriazole derivatives or thiadiazole derivatives;

the antirust agent is at least one of dodecenylsuccinic acid, isononylphenoxyacetic acid or a mixture of phosphoric acid and nonyl amine salt;

the dispersant is at least one of mono-succinimide or polyisobutylene polysuccinimide;

the demulsifier is at least one of a condensation product of amine and epoxide, oil-soluble polyether or a polyoxypropane derivative;

the anti-foaming agent is a silicon type and non-silicon type composite anti-foaming agent;

the pour point depressant is at least one of methacrylate copolymer, vinyl acetate-fumarate copolymer or poly alpha-olefin.

2. The turbine oil composition as claimed in claim 1, wherein the antioxidant mixture comprises 2, 6-di-tert-butylphenol- α -dimethylamino-p-cresol and (3, 5-di-tert-butyl-4-hydroxy-tolyl) - (acetate) -thioether in a weight ratio of (3-9): 1-3.

3. The turbine oil composition as claimed in claim 2, wherein the antioxidant mixture comprises 2, 6-di-tert-butylphenol- α -dimethylamino-p-cresol and (3, 5-di-tert-butyl-4-hydroxy-tolyl) - (acetate) -thioether in a weight ratio of (6-8): 1-3.

4. The turbine oil composition of claim 1, wherein the base oil is a hydrogenated base oil.

5. The turbine oil composition as claimed in any one of claims 1 to 4, which is used for lubricating and sealing a driving device of a high-power supercritical or ultra-supercritical steam turbine set, a gas turbine, a combined cycle, a water turbine set, a large and medium ship and other industrial turbines, and is particularly suitable for working conditions with high requirements on low-temperature fluidity.

Technical Field

The invention relates to a turbine oil composition and use thereof.

Background

With the rapid development of turbine design and manufacturing technology and the national power industry, the trend of turbines towards large-capacity and high-efficiency steam turbine sets and large combined cycle sets is developed, the steam temperature and the working pressure of the steam turbine are continuously increased, the working load is heavier and heavier, and higher requirements are provided for the performances of oxidation resistance, rust resistance, emulsification resistance and the like of turbine oil. In order to meet the change of the performance requirements, the formula of modern turbine oil is also continuously improved, wherein the hydrogenated base oil is widely applied to the turbine oil due to the advantages of low sulfur, low phosphorus, low aromatic hydrocarbon content, good viscosity-temperature characteristic, good additive sensitivity and the like. At present, most turbine oil production enterprises at home and abroad gradually adopt II-type or III-type hydrogenated base oil to blend turbine oil products.

The operating temperature of the turbine oil is generally dozens of degrees, so the requirement on the low-temperature performance of the turbine oil is not high, the requirement on the pour point in most standards is not higher than-7 to-9 ℃, but considering that the temperature is as low as minus dozens of degrees in winter in cold regions, some customers put forward higher requirements on the low-temperature performance of the turbine oil in order to ensure the transportation and starting of the turbine oil under the cold conditions.

In order to reduce the wear of components to the maximum extent and reduce the pollutants such as hard particles, oxidation products, moisture and the like in a circulating system, the lubricating oil of modern large turbines is provided with a filtering device such as a centrifuge, an advanced paper filter, a fiber drum filter and the like in the circulating system, so that the filtering performance of the oil is required for ensuring that the oil does not generate the filtering problem.

Document CN107189837A discloses an antirust extreme pressure heavy load turbine oil composition for ships with high salt spray resistance, humidity and temperature difference, which adopts 70% by mass of group III base oil and phthalate ester as composite base oil, and is matched with various composite additives, so that the turbine oil composition has good performances such as oxidation stability, wear resistance, shear resistance, emulsification resistance and the like, wherein the pour point is about-35 ℃, the dry filterability is 95%, and the wet filterability is pass. The base oil is complex and has poor economy.

Disclosure of Invention

The invention provides a turbine oil composition. The composition has excellent low-temperature flow performance and better wet filterability.

Specifically, the turbine oil composition comprises the following components in parts by weight: 10-30 parts of an antioxidant, 3-5 parts of a metal deactivator, 3-6 parts of an antirust agent, 1-5 parts of a dispersant, 0.5-2 parts of a demulsifier, 0.001-0.005 part of an antifoaming agent, 0.01-0.2 part of a pour point depressant and the balance of base oil; wherein the content of the first and second substances,

the antioxidant is a mixture of 2, 6-di-tert-butylphenol-alpha-dimethylamino-p-cresol and (3, 5-di-tert-butyl-4-hydroxy-tolyl) - (acetate) -thioether;

the metal passivator is at least one of indole derivatives, benzotriazole derivatives or thiadiazole derivatives;

the antirust agent is at least one of dodecenylsuccinic acid, isononylphenoxyacetic acid or a mixture of phosphoric acid and nonyl amine salt;

the dispersant is at least one of mono-succinimide or polyisobutylene polysuccinimide;

the demulsifier is at least one of a condensation product of amine and epoxide, oil-soluble polyether or a polyoxypropane derivative;

the anti-foaming agent is a silicon type and non-silicon type composite anti-foaming agent;

the pour point depressant is at least one of methacrylate copolymer, vinyl acetate-fumarate copolymer or poly alpha-olefin.

According to one aspect of the invention, the weight percentage of the 2, 6-di-tert-butylphenol-alpha-dimethylamino-p-cresol and the (3, 5-di-tert-butyl-4-hydroxy-tolyl) - (acetate) -thioether in the antioxidant mixture is (3-9): 1-3.

According to one aspect of the invention, the weight percentage of 2, 6-di-tert-butylphenol-alpha-dimethylamino-p-cresol and (3, 5-di-tert-butyl-4-hydroxy-tolyl) - (acetate) -thioether in the antioxidant mixture is (6-8): 1-3.

According to one aspect of the invention, the base oil is a hydrogenated base oil.

In the composition, the antioxidant is a mixture of 2, 6-di-tert-butylphenol-alpha-dimethylamino-p-cresol and (3, 5-di-tert-butyl-4-hydroxy tolyl) - (acetate) -thioether, and the weight ratio of the two is (3-9) to (1-3). The 2, 6-di-tert-butylphenol-alpha-dimethylamino-p-cresol has high temperature oxidation resistance and corrosion protection capability, and has a total base number TBN reserve to neutralize acidic oxidation byproducts. The (3, 5-di-tert-butyl-4-hydroxy-tolyl) - (acetate) -thioether serves as both a radical terminator and a peroxide decomposer.

In the composition of the present invention, the metal deactivator is at least one of benzotriazole derivatives or thiadiazole derivatives, such as T551, T561, and the like. The antioxidant is compounded with phenol antioxidant 2, 6-di-tert-butylphenol-alpha-dimethylamino-p-cresol for use, has an outstanding synergistic effect, can obviously reduce the dosage of the antioxidant, and obviously improves the antioxidant performance of oil products.

In the composition, the antirust agent is at least one of dodecenylsuccinic acid, isononylphenoxyacetic acid or a mixture of phosphate nonyl amine salts. Polar groups in the molecules have strong adsorption force on the metal surface, and a compact protective layer formed on the metal surface has solubilization effect on water and polar substances.

In the composition, the dispersant is at least one of mono-succinimide or polyisobutylene polysuccinimide. Can play a better role in dispersion and solubilization.

In the composition, the demulsifier is at least one of a condensate of amine and epoxide, oil-soluble polyether or a polyoxypropane derivative. The condensation product of amine and epoxide has synergistic effect with dodecenylsuccinic acid.

In the composition, the antifoaming agent is a silicon-type and non-silicon-type composite antifoaming agent, such as T921 and T922. The addition amount is preferably 0.001-0.005%, if the addition amount is too small, the ideal anti-foaming effect can not be achieved, and if the addition amount is too large, the air release value of the oil product can be negatively influenced.

In the composition, the pour point depressant is at least one of methacrylate copolymer, vinyl acetate-fumarate copolymer or poly alpha-olefin. The oil-based oil has better fixed-point stability and better adaptability to different base oils.

In the composition of the present invention, the base oil is a hydrogenated base oil.

The preparation method of the composition comprises the following steps: the components are uniformly mixed, heated to 60-70 ℃, heated and stirred for 1-2 hours, and then filtered.

The invention also provides an application of the turbine oil composition. The composition is used for lubricating and sealing a high-power supercritical and ultra-supercritical steam turbine set, a gas turbine, a combined cycle, a water turbine set, a large and medium ship and other industrial turbines and a driving device, and is particularly suitable for working conditions with high requirements on low-temperature fluidity.

The invention adopts the following test method to evaluate the oil product performance: petroleum product pour point determination method (GB/T3535), lubricating oil filterability determination method (SH/T0805), lubricating oil oxidation stability determination (SH/T0193) and the like.

The invention has the advantages that: can effectively improve the low-temperature fluidity of the turbine oil and does not influence the filtering performance of oil products.

The invention is further illustrated by the following examples.

Detailed Description