阅读说明：本技术 一种延长电厂用汽轮机油使用寿命抗氧化剂的使用方法 (Use method of antioxidant for prolonging service life of steam turbine oil for power plant ) 是由 闫柄屹 高枫 苗宇 张宝军 张好峰 孙旗 李娜 于 2020-12-23 设计创作，主要内容包括：本发明涉及一种延长电厂用汽轮机油使用寿命抗氧化剂的使用方法,包括：量取对叔丁基对苯二酚抗氧化剂,将其放入到65℃的汽轮机油加热、搅拌,配制液态酚类抗氧化剂质量分数为0.1％、0.15％、0.2％、0.25％、0.3％的汽轮机油；量取烷基化二苯胺抗氧化剂,将其放入到65℃的汽轮机油加热、搅拌配制液态胺类抗氧化剂质量分数为0.1％、0.15％、0.2％、0.25％、0.3％的汽轮机油；量取对叔丁基对苯二酚抗氧化剂-烷基化二苯胺抗氧化剂,将其放入到65℃的汽轮机油加热、搅拌,配制对叔丁基对苯二酚抗氧化剂-烷基化二苯胺抗氧化剂质量分数为0.1％、0.15％、0.2％、0.25％、0.3％的汽轮机油。本发明将叔丁基对苯二酚抗氧化剂-叔丁基对苯二酚抗氧化剂应用到提升汽轮机油抗氧化能力,能够延长汽轮机油使用寿命。(The invention relates to a use method of an antioxidant for prolonging the service life of turbine oil for a power plant, which comprises the following steps: weighing a p-tert-butyl hydroquinone antioxidant, putting the p-tert-butyl hydroquinone antioxidant into 65 ℃ steam turbine oil, heating and stirring to prepare the steam turbine oil with the liquid phenolic antioxidant of which the mass fractions are 0.1%, 0.15%, 0.2%, 0.25% and 0.3%; weighing an alkylated diphenylamine antioxidant, putting the alkylated diphenylamine antioxidant into 65-DEG C steam turbine oil, heating and stirring to prepare the steam turbine oil with the mass fractions of 0.1%, 0.15%, 0.2%, 0.25% and 0.3% of liquid amine antioxidant; weighing a p-tert-butylhydroquinone antioxidant-alkylated diphenylamine antioxidant, putting the p-tert-butylhydroquinone antioxidant-alkylated diphenylamine antioxidant into 65 ℃ steam turbine oil, heating and stirring to prepare the steam turbine oil with the p-tert-butylhydroquinone antioxidant-alkylated diphenylamine antioxidant of which the mass fractions are 0.1%, 0.15%, 0.2%, 0.25% and 0.3%. The invention applies the tert-butyl hydroquinone antioxidant-tert-butyl hydroquinone antioxidant to the improvement of the antioxidant capacity of the steam turbine oil and can prolong the service life of the steam turbine oil.)

1. A use method of an antioxidant for prolonging the service life of turbine oil for a power plant is characterized by comprising the following steps:

(1) weighing a p-tert-butyl hydroquinone antioxidant, putting the p-tert-butyl hydroquinone antioxidant into turbine oil at 65 ℃ for heating for 2h, then stirring for 20-30 min to ensure that the p-tert-butyl hydroquinone antioxidant is completely and uniformly mixed with the turbine oil, and preparing the turbine oil with the mass fractions of 0.1%, 0.15%, 0.2%, 0.25% and 0.3% of liquid phenolic antioxidants;

(2) weighing an alkylated diphenylamine antioxidant, putting the alkylated diphenylamine antioxidant into 65 ℃ steam turbine oil, heating for 2 hours, stirring for 20-30 min to ensure that the alkylated diphenylamine antioxidant is completely and uniformly mixed with the steam turbine oil, and preparing the steam turbine oil with the liquid amine antioxidant in mass fractions of 0.1%, 0.15%, 0.2%, 0.25% and 0.3%;

(3) weighing a p-tert-butylhydroquinone antioxidant-alkylated diphenylamine antioxidant, putting the p-tert-butylhydroquinone antioxidant-alkylated diphenylamine antioxidant into 65 ℃ steam turbine oil, heating for 2 hours, stirring for 20-30 minutes to ensure that the p-tert-butylhydroquinone antioxidant-alkylated diphenylamine antioxidant is completely and uniformly mixed with the steam turbine oil, and preparing the steam turbine oil with the mass fractions of the p-tert-butylhydroquinone antioxidant-alkylated diphenylamine antioxidant of 0.1%, 0.15%, 0.2%, 0.25% and 0.3%.

2. The method for using the antioxidant for prolonging the service life of the steam turbine oil for power plants according to claim 1, wherein the moisture content of the p-tert-butylhydroquinone antioxidant in the step (1) is less than or equal to 0.1%.

3. The method for using the antioxidant for prolonging the service life of the turbine oil for the power plant according to claim 2, wherein the p-tert-butylhydroquinone antioxidant in the step (1) is a yellowish to reddish brown clear liquid.

4. The method for using the antioxidant for prolonging the service life of the turbine oil for power plants according to claim 3, wherein the p-tert-butylhydroquinone antioxidant in the step (1)The density is 0.93-0.98g/cm³。

5. The method of using an extended service life turbine oil for power plants antioxidant according to claim 1, wherein the alkylated diphenylamine antioxidant in step (2) has a moisture of less than 0.05%.

6. The method of using an extended service life turbine oil for power plants antioxidant as claimed in claim 5 wherein in step (2) the alkylated diphenylamine antioxidant is a light yellow to reddish brown clear liquid.

7. The method of using an antioxidant for extending the service life of turbine oil for power plants according to claim 6, wherein the density of the alkylated diphenylamine antioxidant in step (2) is 0.95-0.96g/cm³。

8. The method for using the antioxidant for prolonging the service life of the steam turbine oil for power plants according to claim 1, wherein the mass ratio of the p-tert-butylhydroquinone antioxidant-alkylated diphenylamine antioxidant in the step (3) is 1: 10.

Technical Field

The invention belongs to the technical field of lubricating oil systems, and particularly relates to a use method of an antioxidant for prolonging the service life of turbine oil for a power plant.

Background

The severity of the lubricating oil refers to the percentage of the oxidation resistance lost by the oil every year in the original new oil, and a lubricating oil system with higher severity needs to be frequently supplemented with oil and replaced with oil when the service life of the oil is short. Conversely, for a low severity system, the oil life may only require routine oil replenishment. At present, lubricating oil is mainly used for lubricating systems of rotating equipment such as power plant lubrication and the like, and plays roles of lubricating, radiating and cooling. Along with the continuous increase of the unit capacity, higher requirements are put forward for lubricating oil, in order to meet new requirements and prolong the service life of oil and reduce the oil supplement amount, various large-oil product production companies improve the oil quality by upgrading base oil and optimizing process formulas, substitute the base oil of the I class by the base oil of the II class and the base oil of the III class, and adopt a new additive formula. At present, the operating years of the turbine oil of the power plant are more than 10 years, the quality of the used lubricating oil is uneven, and the operating conditions of all units are different, so that a series of problems of oxidation resistance reduction and the like in the use process of different lubricating oil are caused, and the difference between the service life and the oil supplement amount is obvious.

Therefore, it is necessary to master the lubrication service life control strategy through antioxidant mechanism research, actual oil system severity prediction and screening test of actual oil system antioxidants, research and develop different types of antioxidants suitable for power generation enterprises, find, control and improve in time when the service life of lubricating oil is reduced and the oil supplement amount is increased, prolong the service life of oil products, and ensure safe and stable operation of oil consumption equipment.

Disclosure of Invention

The invention aims to provide a method for using an antioxidant for prolonging the service life of turbine oil for a power plant, which is characterized in that the antioxidant is specifically compounded through the research on the antioxidant mechanism of the antioxidant, and a stable end product and an inactive free radical are effectively generated, so that the oxidation chain reaction is terminated, the problems of the reduction of the service life of lubricating oil and the increase of oil supplement amount caused by the reduction of the antioxidant capacity of a turbine of the power plant are solved, the service life of an oil product is prolonged, and the safe and stable operation of oil equipment is ensured.

The invention provides a use method of an antioxidant for prolonging the service life of turbine oil for a power plant, which comprises the following steps:

(1) weighing a p-tert-butyl hydroquinone antioxidant, putting the p-tert-butyl hydroquinone antioxidant into turbine oil at 65 ℃ for heating for 2h, then stirring for 20-30 min to ensure that the p-tert-butyl hydroquinone antioxidant is completely and uniformly mixed with the turbine oil, and preparing the turbine oil with the mass fractions of 0.1%, 0.15%, 0.2%, 0.25% and 0.3% of liquid phenolic antioxidants;

(2) weighing an alkylated diphenylamine antioxidant, putting the alkylated diphenylamine antioxidant into 65 ℃ steam turbine oil, heating for 2 hours, stirring for 20-30 min to ensure that the alkylated diphenylamine antioxidant is completely and uniformly mixed with the steam turbine oil, and preparing the steam turbine oil with the liquid amine antioxidant in mass fractions of 0.1%, 0.15%, 0.2%, 0.25% and 0.3%;

(3) weighing a p-tert-butylhydroquinone antioxidant-alkylated diphenylamine antioxidant, putting the p-tert-butylhydroquinone antioxidant-alkylated diphenylamine antioxidant into 65 ℃ steam turbine oil, heating for 2 hours, stirring for 20-30 minutes to ensure that the p-tert-butylhydroquinone antioxidant-alkylated diphenylamine antioxidant is completely and uniformly mixed with the steam turbine oil, and preparing the steam turbine oil with the mass fractions of the p-tert-butylhydroquinone antioxidant-alkylated diphenylamine antioxidant of 0.1%, 0.15%, 0.2%, 0.25% and 0.3%.

Further, in the step (1), the moisture content of the p-tert-butylhydroquinone antioxidant is less than or equal to 0.1%.

Further, the p-tert-butylhydroquinone antioxidant in step (1) is a yellowish to reddish brown clear liquid.

Further, the density of the p-tert-butylhydroquinone antioxidant in the step (1) is 0.93-0.98g/cm³。

Further, the alkylated diphenylamine antioxidant in step (2) has a moisture of less than 0.05%.

Further, the alkylated diphenylamine antioxidant in step (2) is a light yellow to reddish brown clear liquid.

Further, the density of the alkylated diphenylamine antioxidant in step (2) is 0.95-0.96g/cm³。

Further, the mass ratio of the p-tert-butylhydroquinone antioxidant to the alkylated diphenylamine antioxidant in the step (3) is 1: 10.

by means of the scheme, the use method of the antioxidant for prolonging the service life of the turbine oil for the power plant has the following technical effects:

1. the antioxidant for prolonging the service life of the turbine oil for the power plant is rationally designed by adopting a simple compounding strategy, and the antioxidant can prolong the service life of the turbine oil, improve the antioxidant capacity, reduce the treatment cost and reduce the dosage.

2. The compound antioxidant is added to the turbine oil of the power plant: when the mixing ratio of the tertiary butyl hydroquinone antioxidant to the tertiary butyl hydroquinone antioxidant is 1: when the dosage is 10 hours, the effect of improving the oxidation resistance is better than the effect of adding the tert-butyl hydroquinone antioxidant and the tert-butyl hydroquinone antioxidant independently. The compound antioxidant can effectively prolong the service life of the turbine oil while reducing the dosage and the cost.

3. The antioxidant compound has an antioxidant effect in the use process of the tert-butyl hydroquinone antioxidant-alkylated diphenylamine antioxidant compound antioxidant, and by means of the synergistic effect of the tert-butyl hydroquinone antioxidant and the alkylated diphenylamine antioxidant, namely, a single electron which is not paired with an oxygen atom in oil can generate a conjugation effect with an electron cloud effect on a benzene ring in tert-butyl hydroquinone, and the conjugation effect enables the paired electrons not to be fixed on the oxygen atom but to be partially distributed on the benzene ring to form an inactive free radical. Meanwhile, the alkylated diphenylamine provides hydrogen protons, so that oxygen atoms in the oil can be rapidly captured and combined with the oil to generate a final product, and thus, the two antioxidants are compounded and used under the synergistic effect to avoid initiating chain reaction to a greater extent, the oxidation resistance and oxidation resistance of the antioxidant are greatly enhanced, the oil solubility is good, and the volatility is low; the oil does not react with the components in the oil, does not deteriorate after long-term use, and does not damage the excellent properties and the service performance of the oil product; is insoluble in water; does not corrode metal and related materials in equipment, does not decompose, evaporate, absorb moisture and the like at the temperature of oil equipment; the sensitivity is good. Compared with the single use of the tert-butyl hydroquinone antioxidant and the tert-butyl hydroquinone antioxidant, the service life of the added turbine oil is 5 to 10 percent longer.

The foregoing is a summary of the present invention, and in order to provide a clear understanding of the technical means of the present invention and to be implemented in accordance with the present specification, the following is a detailed description of the preferred embodiments of the present invention.

Drawings

FIG. 1 is a graph of remaining life as a percentage of original life versus age versus oil recovery for a turbine oil system having a severity of 18% according to an embodiment of the present disclosure;

FIG. 2 is a steam turbine oil system severity determination curve in accordance with an embodiment of the present invention;

FIG. 3 is a graph comparing rotational oxygen bomb (antioxidant capacity) of a turbine oil with varying amounts of tertiary butyl hydroquinone antioxidant, alkylated diphenylamine antioxidant, and tertiary butyl hydroquinone antioxidant-alkylated diphenylamine antioxidant combination antioxidant in accordance with an embodiment of the present invention.

Detailed Description

The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

The embodiment provides a use method of an antioxidant for prolonging the service life of turbine oil for a power plant, which comprises the following steps:

(1) weighing a p-tert-butyl hydroquinone antioxidant, putting the p-tert-butyl hydroquinone antioxidant into 65 ℃ steam turbine oil, heating for a period of time (such as 2 hours), then stirring for 20-30 min to ensure that the p-tert-butyl hydroquinone antioxidant is completely and uniformly mixed with the steam turbine oil, and preparing the steam turbine oil with the liquid phenol antioxidant in mass fractions of 0.1%, 0.15%, 0.2%, 0.25% and 0.3%;

(2) weighing an alkylated diphenylamine antioxidant, putting the alkylated diphenylamine antioxidant into 65 ℃ steam turbine oil, heating for a period of time (such as 2 hours), then stirring for 20-30 min to ensure that the alkylated diphenylamine antioxidant is completely and uniformly mixed with the steam turbine oil, and preparing the steam turbine oil with the liquid amine antioxidant in mass fractions of 0.1%, 0.15%, 0.2%, 0.25% and 0.3%;

(3) weighing a p-tert-butylhydroquinone antioxidant-alkylated diphenylamine antioxidant, putting the p-tert-butylhydroquinone antioxidant-alkylated diphenylamine antioxidant into 65 ℃ steam turbine oil, heating for a period of time (such as 2 hours), then stirring for 20-30 min to ensure that the p-tert-butylhydroquinone antioxidant-alkylated diphenylamine antioxidant is completely and uniformly mixed with the steam turbine oil, and preparing the steam turbine oil with the mass fractions of the p-tert-butylhydroquinone antioxidant-alkylated diphenylamine antioxidant of 0.1%, 0.15%, 0.2%, 0.25% and 0.3%.

According to the characteristics of the steam turbine oil in the power plant and the performance of the antioxidant, the tert-butyl hydroquinone antioxidant-tert-butyl hydroquinone antioxidant is applied to improving the antioxidant capacity of the steam turbine oil, so that the purposes of reducing the dosage and realizing optimal improvement through experimental compounding are achieved, the use requirement of the steam turbine oil in the power plant is met, and the service life of the steam turbine oil is prolonged.

The steam turbine oil used by a certain thermal power plant is taken as an object, the operating temperature is 50-55 ℃, the operating time is 12 years, the oil supplement rate is 25%, the oxidation life loss rate is 72%, the severity is 18%, and the service life accounts for 20% of the original service life. Adding a tert-butyl hydroquinone antioxidant, namely a tert-butyl hydroquinone antioxidant, into oil, wherein the adding amount is 0.2%, detecting after running for 1 month, the oil supplement rate is reduced to 15%, the oxidation life loss rate is reduced to 60%, the severity is reduced to 15%, the service life is prolonged to 30% of the original service life, and under the same condition, only the tert-butyl hydroquinone antioxidant and the tert-butyl hydroquinone antioxidant are added, the oil supplement rate is 24%, the oxidation life loss rate is 70%, the severity is 17%, and the service life is 21% of the original service life; the oil supplementing rate is 23%, the oxidation life loss rate is 69%, the severity is 16%, and the service life accounts for 20% of the original service life.

Experimental results show that the normal operation of the turbine oil of a power plant can be ensured by using the tert-butyl hydroquinone antioxidant-tert-butyl hydroquinone antioxidant in a compounding way, and the service life of the turbine oil can be effectively prolonged while the dosage is reduced. The relevant data are shown in fig. 1 to 3.

In this embodiment, the moisture content of the p-tert-butylhydroquinone antioxidant in step (1) is 0.1% or less.

In this example, the p-tert-butylhydroquinone antioxidant described in step (1) was a yellowish to reddish brown clear liquid.

In this example, the p-tert-butylhydroquinone antioxidant in step (1) had a density of 0.93 to 0.98g/cm³。

In this example, the alkylated diphenylamine antioxidant in step (2) had a moisture of less than 0.05%.

In this example, the alkylated diphenylamine antioxidant in step (2) was a light yellow to reddish brown clear liquid.

In this example, the alkylated diphenylamine antioxidant of step (2) had a density of 0.95-0.96g/cm³。

In this embodiment, the mass ratio of the p-tert-butylhydroquinone antioxidant-alkylated diphenylamine antioxidant in the step (3) is 1: 10.

the use method of the antioxidant for prolonging the service life of the turbine oil for the power plant has the following technical effects:

1. the antioxidant for prolonging the service life of the turbine oil for the power plant is rationally designed by adopting a simple compounding strategy, and the antioxidant can prolong the service life of the turbine oil, improve the antioxidant capacity, reduce the treatment cost and reduce the dosage.

2. The compound antioxidant is added to the turbine oil of the power plant: when the mixing ratio of the tertiary butyl hydroquinone antioxidant to the tertiary butyl hydroquinone antioxidant is 1: when the dosage is 10 hours, the effect of improving the oxidation resistance is better than the effect of adding the tert-butyl hydroquinone antioxidant and the tert-butyl hydroquinone antioxidant independently. The compound antioxidant can effectively prolong the service life of the turbine oil while reducing the dosage and the cost.

3. The antioxidant compound has an antioxidant effect in the use process of the tert-butyl hydroquinone antioxidant-alkylated diphenylamine antioxidant compound antioxidant, and by means of the synergistic effect of the tert-butyl hydroquinone antioxidant and the alkylated diphenylamine antioxidant, namely, a single electron which is not paired with an oxygen atom in oil can generate a conjugation effect with an electron cloud effect on a benzene ring in tert-butyl hydroquinone, and the conjugation effect enables the paired electrons not to be fixed on the oxygen atom but to be partially distributed on the benzene ring to form an inactive free radical. Meanwhile, the alkylated diphenylamine provides hydrogen protons, so that oxygen atoms in the oil can be rapidly captured and combined with the oil to generate a final product, and thus, the two antioxidants are compounded and used under the synergistic effect to avoid initiating chain reaction to a greater extent, the oxidation resistance and oxidation resistance of the antioxidant are greatly enhanced, the oil solubility is good, and the volatility is low; the oil does not react with the components in the oil, does not deteriorate after long-term use, and does not damage the excellent properties and the service performance of the oil product; is insoluble in water; does not corrode metal and related materials in equipment, does not decompose, evaporate, absorb moisture and the like at the temperature of oil equipment; the sensitivity is good. Compared with the single use of the tert-butyl hydroquinone antioxidant and the tert-butyl hydroquinone antioxidant, the service life of the added turbine oil is 5 to 10 percent longer.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, it should be noted that, for those skilled in the art, many modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.