CN110591789A

CN110591789A - Composition for improving oil sludge of steam turbine oil and application thereof

Info

Publication number: CN110591789A
Application number: CN201910845082.2A
Authority: CN
Inventors: 金晓晨; 陈小雪; 崔建军
Original assignee: Panjin Northern Asphalt Ltd By Share Ltd
Current assignee: Panjin Northern Asphalt Ltd By Share Ltd
Priority date: 2019-09-07
Filing date: 2019-09-07
Publication date: 2019-12-20

Abstract

The composition for improving the oil sludge generation amount of the turbine oil is composed of 20% -50% of alkyl diphenylamine and derivatives thereof, 20% -60% of phenolic compounds, 0.1% -2% of phosphate ammonium salt mixture, 0.1% -5% of benzotriazole and derivatives thereof, and 0.1% -10% of carboxylic acid derivatives thereof in percentage by mass. The composition can obviously inhibit the generation of the oil sludge of the turbine oil, prolongs the service life of the oil product, has simple preparation method, and is suitable for adding and improving the generation of the oil sludge of the turbine oil.

Description

Composition for improving oil sludge of steam turbine oil and application thereof

Technical Field

The invention relates to the technical field of lubricating oil, in particular to a composition for improving oil sludge of a turbine oil and application thereof.

Background

In recent years, the rapid development of the industry in China, the power demand is continuously rising, a large-capacity, high-power, high-temperature, high-pressure and high-rotation-speed gas turbine and a gas-steam combined cycle are widely applied, the working parameters of the turbine are higher and higher, the operating conditions are more harsh than those of a common turbine, the operating environment of turbine oil is more and more severe, and higher requirements are provided for the performance of the turbine oil. For example, the working temperature of heavy-duty gas turbine oil is 50-95 ℃, the local temperature can exceed 250 ℃, and the heavy-duty gas turbine oil is often in a start-stop state, the oil temperature is increased during operation, and the excessive temperature is easy to cause the decomposition of oil products and the failure of additives. In addition, due to the influence of air, moisture and other pollutants, the thermal degradation and oxidative deterioration of the turbine oil are easily caused, and polar substances are generated. When these polar materials accumulate to a certain amount, the aging of the oil is easily accelerated and sludge and varnish are formed. The generated oil sludge is deposited on pipelines, filters, bearings and electro-hydraulic servo valves, so that the filter is blocked, the oil supply is insufficient, the bearings are abraded, the valves are bonded, the speed regulation fails and other consequences are caused, and finally the loss of abnormal shutdown is caused. Therefore, how to control the generation of oil sludge of the turbine oil in operation becomes a great difficulty in the field of the turbine oil, and the influence caused by oil oxidation, hydrolytic emulsification and equipment abrasion and corrosion needs to be comprehensively considered.

Most of the existing turbine oil complexing agents are from the aspects of anti-foaming, anti-emulsification, liquid-phase corrosion, extreme pressure anti-wear property and the like of oil products, only the influence of single performance on the oil products is considered, and the generation of oil sludge caused by the imbalance of the overall performance is ignored. For example, amine antioxidants can provide better antioxidant performance, but are easily oxidized to discolor and generate oil sludge; the addition of the antirust agent can well inhibit the adverse effect caused by equipment corrosion, but the improper use of the antirust agent can generate acidic substances to degrade oil products so as to influence the filterability; extreme pressure antiwear agents and demulsifiers also tend to increase sludge formation and make it difficult to find a balance point in performance. In addition, the supply of the turbine oil complexing agent on the market is relatively small, most manufacturers use several single agents to simply blend the single agents, the overall performance of the turbine oil is lack of control, and the problem of oil sludge generation is not effectively improved.

Disclosure of Invention

The present invention is directed to solving the above problems in the prior art, and provides a composition for improving turbine oil sludge, which can effectively improve the generation problem of turbine oil sludge during operation, ensure longer service life of oil products, and provide better protection for turbine equipment.

The technical scheme of the invention is that the composition for improving the oil sludge of the steam turbine oil comprises the following raw material components in percentage by mass: alkyl diphenylamines and their derivatives: 20% -50%; phenolic compounds: 20% -60%; phosphate ammonium salt mixture: 0.1% -2%; benzotriazole and its derivatives: 0.1% -5%; carboxylic acids and derivatives thereof: 0.1 to 10 percent.

The alkyl diphenylamine and the derivatives thereof as well as the phenolic compounds are antioxidants, belong to free radical scavengers and are used for capturing peroxidated free radicals in the oxidation process and inhibiting the chain growth of the free radicals so as to prevent the oxidation from proceeding; the phosphate ammonium salt mixture is an antiwear agent, when the contact pressure of a friction surface is high, local high pressure and high temperature are generated, and a phosphorus-containing compound and the metal surface generate chemical reaction to generate a phosphorized metal solid protective film with low shear strength, so that the abrasion and sintering of metal are prevented; the benzotriazole and the derivative thereof are metal passivators, have the function of generating chelates or protective films with metal ions, can inhibit the catalytic action of the metal or the ions on oxidation, are effective antioxidants, and are also good copper corrosion inhibitors, anti-wear agents and antirust agents; the carboxylic acid and the derivatives thereof are rust inhibitors, can generate salt with metal and are firmly adsorbed on the surface of the metal, so that the metal is not corroded.

Furthermore, the alkyl diphenylamine and the derivatives thereof are one or a mixture of more than two of alkylated diphenylamine, N-phenyl-alpha-naphthylamine, octyl/butyl diphenylamine and octyl/pentyl diphenylamine p, p-dioctyl diphenylamine.

Further, the phenolic compound is one or a mixture of more than two of 2, 6-tert-butyl-p-cresol and 2, 4-dimethyl-6-tert-butyl phenol.

Further, the phosphate ammonium salt mixture is one or a mixture of more than two of tricresyl phosphate, triphenyl thiophosphate, thiophosphoric acid complex ester ammonium salt, acidic phosphate ammonium salt, nonyl ammonium phosphate salt mixture and dialkyl dithiophosphate. .

Furthermore, the benzotriazole and the derivatives thereof are one or a mixture of benzotriazole, tolutriazole and tetraphenylbenzotriazole.

Further, the carboxylic acid and its derivative are one or a mixture of two or more of alkenyl succinic acid, alkyl succinic acid, (2-sulfobenzotriazole) succinic acid, and n-oleyl sarcosine.

The invention also provides application of the composition for improving the turbine oil sludge, which is applied to turbine oil of gas turbines, steam turbines, hydraulic turbines and combined cycle units, and the application mode is as follows: adding the composition into turbine oil in proportion, heating to 56-65 ℃, stirring for 60-90 minutes, and filtering to obtain the catalyst. .

The invention has the advantages that: the composition has simple preparation method and low product price, can well improve the generation of oil sludge of the steam turbine oil in operation, and ensures that the used oil product has longer service life.

Detailed Description

The present invention will be described in further detail below with reference to specific embodiments in order to make the present invention better understood by those skilled in the art.

Example 1

The composition for improving the oil sludge of the turbine oil comprises the following components in percentage by mass:

37 percent of alkyl diphenylamine; 57.5% of tert-butyl phenol derivative; 2% of a benzotriazole derivative; alkenyl succinic acid 2 percent; nonyl ammonium phosphate salt mixture 1.5%.

Example 2

47% of alkyl diphenylamine; 47% of a tert-butyl phenol derivative; 3% of a benzotriazole derivative; alkenyl succinic acid 2 percent; 1% of nonyl ammonium phosphate salt mixture.

Example 3

30% of alkyl diphenylamine; 30% of tert-butyl phenol derivative; 5% of a benzotriazole derivative; alkyl succinic acid derivatives 10%; 25% of thiocarbamate.

Control group 1

To compare the improvement in the amount of sludge produced by the composition, the composition was compared with external composition 1.

Control group 2

To compare the improvement in steam turbine oil sludge formation by the composition, a comparison was made with external composition 2.

Adding the formula product in the embodiment 1-3 and the control group 1-2 into base oil respectively according to the dosage of 0.45 percent by mass, testing the steam turbine oil Dry-TOST, and testing the sludge generation amount;

the base oil is 40 million-two subtracts from Beijing and is purchased from Bitumo GmbH;

the performance of the formulated products of examples 1-3 were tested using national or industry standard analytical methods and compared to the comparative examples of the composition products of control 1-2, and the results are shown in Table 1.

TABLE 1 comparison of Performance data for the formulated products of examples 1-3 with the control products

The data in Table 1 show that the compositions of the examples and the compositions of the control group have similar initial physical and chemical properties, meet the requirements of relevant standards and are comparable.

The Dry-TOST test and sludge formation test results are shown in Table 2.

Table 2 sludge testing comparison of the formulated products of examples 1-3 with the control 1-2 products

The comparative experiment shows that: the performance of the composition of the invention in the aspect of controlling the generation of the oil sludge of the steam turbine oil is obviously superior to that of a competitive product control group.

Having described embodiments of the present invention, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. The composition for improving the oil sludge of the turbine oil is characterized by comprising the following raw material components in percentage by mass:

alkyl diphenylamines and their derivatives: 20% -50%;

phenolic compounds: 20% -60%;

phosphate ammonium salt mixture: 0.1% -2%;

benzotriazole and its derivatives: 0.1% -5%;

carboxylic acids and derivatives thereof: 0.1 to 10 percent.

2. The composition for improving turbine oil sludge according to claim 1, wherein the alkyl diphenylamine and derivatives thereof are one or a mixture of two or more of alkylated diphenylamine, N-phenyl-alpha-naphthylamine, octyl/butyl diphenylamine, octyl/pentyl diphenylamine p, p-dioctyl diphenylamine.

3. The composition for improving oil sludge of steam turbine oil according to claim 1, wherein the phenolic compound is one or a mixture of two or more of 2, 6-tert-butyl-p-cresol and 2, 4-dimethyl-6-tert-butylphenol. .

4. The composition for improving turbine oil sludge according to claim 1, wherein the phosphate ammonium salt mixture is one or a mixture of two or more of tricresyl phosphate, triphenyl thiophosphate, complex thiophosphate ammonium salt, acidic phosphate ammonium salt, nonyl ammonium salt phosphate mixture, and dialkyl dithiophosphate.

5. The composition for improving turbine oil sludge according to claim 1, wherein the benzotriazole and its derivatives are one or a mixture of benzotriazole, tolutriazole and tetraphenylbenzotriazole.

6. The composition for improving turbine oil sludge as claimed in claim 1, wherein the carboxylic acid and its derivative is alkenyl succinic acid, alkyl succinic acid, (2-sulfobenzotriazole) succinic acid, n-oleyl sarcosine, etc.

7. Use of a composition according to any of claims 1 to 6 for improving turbine oil sludge in turbine oils for gas turbines, steam turbines, water turbines, combined cycle units by: adding the composition into turbine oil in proportion, heating to 56-65 ℃, stirring for 60-90 minutes, and filtering to obtain the catalyst.