CN113773896A - Extreme pressure type steam turbine oil complexing agent and preparation method thereof - Google Patents

Abstract

The invention relates to an extreme pressure type turbine oil complexing agent and a preparation method thereof, wherein the extreme pressure type turbine oil complexing agent comprises the following components: the antirust agent comprises at least one of dodecenyl succinic acid half ester, dinonyl naphthalene sulfonic acid amine and alkenyl imidazoline succinate. The turbine oil prepared by the extreme pressure type turbine oil complexing agent has a lower acid value, can improve the quality of oil products, and prolongs the service life of equipment; the wear-resistant performance is better, and the method can be suitable for high-load steam turbine oil equipment; the oil-changing agent has better oxidation resistance and prolongs the oil-changing period; the filter has excellent filtering performance and can meet the normal operation of high-precision steam turbine unit equipment.

Description

Extreme pressure type steam turbine oil complexing agent and preparation method thereof

Technical Field

The invention relates to the technical field of turbine oil, in particular to an extreme pressure type turbine oil complexing agent and a preparation method thereof.

Background

The steam turbine set mainly comprises a steam turbine and a gas turbine, and both use turbine oil as a working medium to transfer pressure and participate in the work of a speed regulating system. In addition, in the sliding bearing of the steam turbine, the turbine oil lubricates the shaft diameter and the bearing bush, and plays roles of reducing friction and abrasion. In addition, the turbine oil also has cooling, cleaning, corrosion protection and sealing functions. The lubricating oil is widely applied to lubrication of rotating equipment such as steam turbines, gas turbines, water turbines of power plants, steam turbines of large and medium-sized ships, industrial gas turbines, turbo compressors, turbo refrigerators, turbo blowers, turbo pumps and the like. With the continuous update of steam turbine technology, the capacity and parameters of a steam turbine unit are improved, and steam turbine oil needs better oxidation stability, smaller oil sludge and paint film generation tendency, better antirust performance and filtering performance, and excellent wear resistance to reduce the wear of a bearing. The problems of common antioxidant performance, higher acid value of oil products, poorer abrasion resistance, poorer filtering performance and the like of the existing steam turbine oil products generally exist

Disclosure of Invention

The invention aims to provide an extreme pressure type turbine oil complexing agent and a preparation method thereof, and solves the problems of common antioxidant performance, higher acid value of an oil product, poorer abrasion resistance and poorer filtering performance of a turbine oil product in the prior art.

The technical scheme adopted by the invention for solving the technical problem is as follows: an extreme pressure type turbine oil complexing agent comprises the following components: the antirust agent comprises at least one of dodecenyl succinic acid half ester, dinonyl naphthalene sulfonic acid amine and alkenyl imidazoline succinate.

In the extreme pressure type steam turbine oil complexing agent, the antioxidant comprises at least one of butyl, octyl diphenylamine, dinonyl diphenylamine, N-phenyl-alpha naphthylamine, 2, 6-di-tert-butylphenol, isooctyl beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate and dialkyl dithiocarbamate.

In the extreme pressure type turbine oil complexing agent, the extreme pressure antiwear agent comprises at least one of di-n-butyl phosphite, tricresyl phosphate, thiophosphate and amine salt derivatives thereof, and phosphate and amine salt derivatives thereof.

In the extreme pressure type turbine oil complexing agent, the metal deactivator comprises at least one of a benzotriazole derivative and a thiadiazole derivative;

the demulsifier is a polycondensate of amine and ethylene oxide;

the base oil is neutral base oil.

Wherein, the neutral base oil comprises but is not limited to at least one of 150N and 150 SN. Where N refers to the Saybolt viscosity (seconds) for neutral oil grades at 37.8 deg.C (100F.), e.g., 150N, 100N, 500N. SN refers to a paraffin-based neutral oil whose viscosity is divided by kinematic viscosity at 40 ℃.

The extreme pressure type turbine oil complexing agent comprises the following components in percentage by mass: 50-70 parts of antioxidant, 6-10 parts of antirust agent, 10-20 parts of extreme pressure antiwear agent, 6-10 parts of metal deactivator, 1-3 parts of demulsifier and 1-15 parts of base oil.

In the extreme pressure type turbine oil complexing agent of the present invention, the rust inhibitor includes dinonyl naphthalenesulfonic acid amine and alkenyl imidazoline succinate.

In the extreme pressure type turbine oil complexing agent, the antioxidant comprises at least two of dinonyl diphenylamine, isooctyl beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate and dialkyl dithiocarbamate.

In the extreme pressure type turbine oil complexing agent, the extreme pressure antiwear agent comprises tricresyl phosphate, thiophosphate and amine salt derivatives thereof, and phosphate and amine salt derivatives thereof.

The invention also provides a preparation method of any one of the extreme pressure type turbine oil complexing agents, which comprises the following steps:

s1, adding an antioxidant into the container;

s2, sequentially adding an antirust agent, base oil, a metal deactivator, an extreme pressure antiwear agent and a demulsifier under the condition of stirring and heating;

and S3, keeping the temperature rising, continuously stirring and uniformly mixing to obtain the extreme pressure type turbine oil complexing agent.

In the preparation method of the invention, in step S2, the temperature is raised to 50-65 ℃; in step S3, keeping stirring at 50-65 ℃ for 2-3 hours;

step S4 is also included after step S3: and filtering the uniformly mixed extreme pressure type turbine oil complexing agent.

The extreme pressure type steam turbine oil complexing agent and the preparation method thereof have the following beneficial effects: the turbine oil prepared by the extreme pressure type turbine oil complexing agent has a lower acid value, can improve the quality of oil products, and prolongs the service life of equipment; the wear-resistant performance is better, and the method can be suitable for high-load steam turbine oil equipment; the oil-changing agent has better oxidation resistance and prolongs the oil-changing period; the filter has excellent filtering performance and can meet the normal operation of high-precision steam turbine unit equipment.

Detailed Description

The extreme pressure type turbine oil complexing agent and the preparation method thereof of the present invention will be further described with reference to the following examples:

blending components of the extreme pressure type turbine oil complexing agent of the following embodiment into 46# turbine oil, and carrying out comparative evaluation according to acid value, wear resistance, oxidation resistance, antirust performance and filterability in GB 11120-2011; the oil blending formula (mass percent) is as follows: 0.4 percent of extreme pressure type turbine oil complexing agent, 59.8 percent of stage plastic II type 150N base oil, 39.8 percent of stage plastic II type 500N base oil, and 40ppm of methacrylate antifoaming agent.

Table 1: component proportion of extreme pressure type turbine oil recombiners of examples 1 to 11 (based on 100 parts by mass)

Table 2: data of rust prevention experiment

Sample name	Antirust effect
		Example 1	Non-rust
Example 2	Non-rust
		Example 3	Non-rust
Example 4	Non-rust
		Example 5	Non-rust
Example 6	Non-rust
		Example 7	Non-rust
Example 8	Non-rust
		Example 9	Non-rust
Example 10	Severe rust
		Example 11	Non-rust

As can be seen from the data in Table 2, the rust inhibitive performance of example 10 is significantly reduced when the rust inhibitive agent is less than 6%; when the content of the antirust agent is more than 10%, the antirust performance is excellent, and the antirust effect is excellent when the content of the antirust agent is more than 6%.

Table 3: acid value detection results (acid value detection of samples according to GB/T4945-acid and base value determination method for petroleum products and lubricants)

As can be seen from the data in Table 3, the acid numbers are all much lower than the standard, with the lower acid numbers of examples 4, 8, 9, 10, 11, indicating that the combination of the rust inhibitor dinonylnaphthalenesulfonamide and alkenyl imidazoline succinate can reduce the acid number of the complexing agent. Meanwhile, the acid value of the oil product is far less than that of the steam turbine oil at home and abroad by 0.05mgKOH/g, so that the quality of the oil product is effectively improved.

Table 4: comparison of filtration Performance (filtration test on samples according to SH/T0805-oil filterability test method, GB 11120 requires Dry filterability not less than 85 and Wet filterability not less than 50)

Sample name	Dry process	Wet process
			Example 1	88	71
Example 2	87	80
			Example 3	88	68
Example 4	92	92
			Example 5	87	70
Example 6	88	71
			Example 7	87	76
Example 8	90	88
			Example 9	92	91
Example 10	90	87
			Example 11	91	90

As can be seen from the data in Table 4, the filtration performance of the turbine oil may be related to the hydrolysis resistance of the rust inhibitor, and the extreme pressure type turbine oil complexing agent in each example has better filtration performance, wherein the filtration performance of the turbine oil is the best in examples 4, 8, 9, 10 and 11 by using the combination of the rust inhibitor dinonylnaphthalenesulfonic acid amine and alkenyl imidazoline succinate, and the wet filtration performance is above 85, which indicates that the combination of the two rust inhibitors can obviously improve the filtration performance of the oil product.

Table 5: component proportion of extreme pressure type turbine oil recombiners of examples 12 to 21 (based on 100 parts by mass)

Table 6: and (3) comparing the wear resistance (according to SH/T0189-a method for measuring the wear resistance of lubricating oil (a four-ball method), carrying out wear resistance evaluation on the sample (the experimental conditions are: 392N, 75 ℃, 1200r/min and 60min), wherein the experimental result is the diameter of a wear spot, the smaller the numerical value, the more excellent the wear resistance, according to GB/T3142-a method for measuring the bearing capacity of the lubricating oil (the four-ball method), the maximum non-seizure load of the sample is measured, and the result is P_B(kg) the larger the value, the better the abrasion resistance

Sample name	Abrasive spot diameter, mm	PB，kg
			Example 12	0.395	88
Example 13	0.425	82
			Example 14	0.480	71
Example 15	0.501	76
			Example 16	0.345	100
Example 17	0.401	82
			Example 18	0.485	76
Example 19	0.472	76
			Example 20	0.312	107
Example 21	0.372	94

As can be seen from the data in Table 6, examples 16, 20, 21 have excellent antiwear properties using tricresyl phosphate, thiophosphate and amine salt derivatives thereof, and a combination of phosphate and amine salt derivatives thereof antiwear agents.

Table 7: the component proportion of the extreme pressure type turbine oil recombiners of examples 22 to 29 (based on 100 parts by mass)

Table 8: comparison of antioxidant Properties (SH/T0193-Oxidation Induction period of rotating oxygen bomb test sample for measuring Oxidation stability of lubricating oil)

As is clear from the data in Table 8, the antioxidant properties of examples 22 and 23 were poor when a single antioxidant was used; in the embodiment 24, dinonyl diphenylamine and isooctyl beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate are compounded, so that the rotating oxygen bomb time is obviously prolonged, and the compounding of the two antioxidants has a good synergistic effect; the dinonyl diphenylamine, the isooctyl beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate and the dialkyl dithiocarbamate used in the example 25 are compounded, and the rotating oxygen bomb time is obviously improved compared with the example 24, which shows that the three antioxidants have obvious synergistic action. Example 26 shows that the total antioxidant content is reduced by 10%, the rotating oxygen bomb time is reduced, example 27 shows that the total antioxidant content is increased by 10%, and the rotating oxygen bomb time is hardly increased, which indicates that the total antioxidant amount is increased within a certain range to improve the antioxidant property, and the antioxidant property is not obviously improved when the antioxidant is excessive. Examples 28 and 29 further show that dinonyldiphenylamine and isooctyl beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate, as well as dialkyldithiocarbamate, are most effective when combined, and that the combination of other antioxidants such as butyloctyldiphenylamine and N-phenyl-alpha-naphthylamine is not as good as the combination of the three.

The preparation methods of examples 1 to 29 are as follows: adding an antioxidant into a container, heating to 50-65 ℃ while stirring, and simultaneously sequentially adding an antirust agent, base oil, a metal deactivator, an extreme pressure antiwear agent and a demulsifier; keeping the temperature at 50-65 ℃, stirring for 2-3 hours, and filtering to obtain the turbine oil complexing agent products of the embodiments.

It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings, and all such modifications and variations are intended to be included within the scope of the invention as defined in the appended claims.

Claims (10)

1. The extreme pressure type turbine oil complexing agent is characterized by comprising the following components: the antirust agent comprises at least one of dodecenyl succinic acid half ester, dinonyl naphthalene sulfonic acid amine and alkenyl imidazoline succinate.

2. The extreme pressure turbine oil complex of claim 1, wherein the antioxidant comprises at least one of butyl, octyl diphenylamine, dinonyl diphenylamine, N-phenyl-alpha naphthylamine, 2, 6-di-tert-butylphenol, isooctyl beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate, and dialkyl dithiocarbamate.

3. The extreme pressure turbine oil complex of claim 2, wherein the extreme pressure antiwear agent comprises at least one of di-n-butyl phosphite, tricresyl phosphate, thiophosphate and amine salt derivatives thereof, and phosphate and amine salt derivatives thereof.

4. The extreme pressure turbine oil complex of claim 3, wherein the metal deactivator comprises at least one of a benzotriazole derivative, a thiadiazole derivative;

the demulsifier is a polycondensate of amine and ethylene oxide;

the base oil is neutral base oil.

5. The extreme pressure turbine oil complexing agent as claimed in claim 4, wherein the extreme pressure turbine oil complexing agent comprises the following components in percentage by mass: 50-70 parts of antioxidant, 6-10 parts of antirust agent, 10-20 parts of extreme pressure antiwear agent, 6-10 parts of metal deactivator, 1-3 parts of demulsifier and 1-15 parts of base oil.

6. The extreme pressure turbine oil complex of claim 1, wherein the rust inhibitor comprises dinonylnaphthalenesulfonate and alkenyl imidazoline succinate.

7. The extreme pressure turbine oil complex of claim 2, wherein the antioxidant comprises at least two of dinonyldiphenylamine, isooctyl β - (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate, and dialkyldithiocarbamate.

8. The extreme pressure turbine oil complex of claim 3, wherein the extreme pressure antiwear agent comprises tricresyl phosphate, thiophosphate ester and amine salt derivatives thereof, and phosphate ester and amine salt derivatives thereof.

9. A method for preparing the extreme pressure turbine oil complexing agent as defined in any one of claims 1 to 8, comprising:

s1, adding an antioxidant into the container;

s2, sequentially adding an antirust agent, base oil, a metal deactivator, an extreme pressure antiwear agent and a demulsifier under the condition of stirring and heating;

and S3, keeping the temperature rising, continuously stirring and uniformly mixing to obtain the extreme pressure type turbine oil complexing agent.

10. The method according to claim 1, wherein in step S2, the temperature is raised to 50-65 ℃; in step S3, keeping stirring at 50-65 ℃ for 2-3 hours;

step S4 is also included after step S3: and filtering the uniformly mixed extreme pressure type turbine oil complexing agent.