JP2017062215A - Property evaluating method of industrial oil, property evaluation device of industrial oil, and circulation device of industrial oil - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform evaluation of industrial oil, especially deterioration determination of the industrial oil at an early stage and simply, inexpensively, rapidly, surely only by addition of water without addition of chemical substance such as a reagent.SOLUTION: Water into which acidic substance generated by deterioration of hydraulic oil is dissolved is mixed with the hydraulic oil, and the mixed liquid is divided into a water layer 31 and an oil layer 32 by a centrifugal force generated using centrifugal separation means to evaluate pH of hydrophilic acidic substance, that is, the water layer 31 into which the acidic substance generated by deterioration caused by hydrolysis is dissolved. Deterioration of the hydraulic oil is determined by grasping concentration of the acidic substance existing in the hydraulic oil.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a property evaluation method for industrial oil and a property evaluation device for industrial oil for judging deterioration of oil such as hydraulic oil used in various machinery equipment.

  The present invention also relates to a circulating device for industrial oil such as hydraulic oil used in various machine equipment.

  2. Description of the Related Art Conventionally, various industrial oils are used in various machine equipments for purposes such as power transmission media, lubricants, rust prevention and cooling. For example, in thermal power plants, for example, phosphate esters are widely used as oils for hydraulic operation that are excellent in fire resistance, lubricity, oxidation stability, and responsiveness.

  Industrial oil gradually deteriorates with use, and moisture, dust, air (oxygen) and the like mixed during use may promote deterioration. When industrial oil deteriorates, various machine troubles such as excessive increase in metal wear of used equipment are induced. In order to prevent machine troubles, it is an effective means to evaluate the deterioration state of industrial oil in use.

  Therefore, accurate evaluation of deterioration of industrial oil is an important factor that leads to stable operation of machinery and equipment, and improvement of productivity and economy.

  As a means for evaluating the deterioration state of industrial oil, for example, an ion concentration sensor (pH sensor) having a specific structure whose outer surface is covered with an ionic liquid film is used, and the total oxidation of the lubricating oil (oil deterioration index) is directly performed. There is a method of measuring (see Patent Document 1). In addition, for example, there is a technique in which a specific indicator is held in an ultrafiltration membrane having a specific structure, and the base number of the lubricating oil is measured based on a neutralization reaction on the ultrafiltration membrane (see Patent Document 2). .

  In addition, for example, there is a method using an apparatus having a specific structure in which an optical filter is disposed between a light emitting unit and a measurement sample (hydraulic oil) and the absorbance of a plurality of wavelengths is measured by one light emitting unit and a light receiving unit (Patent Literature). 3). Further, for example, there is a method of using a monitor device having a specific structure that divides visible light transmitted through a lubricating oil into three primary colors and detects the absorbance of each of them (see Patent Document 4).

  However, any of the techniques of Patent Documents 1 to 4 often requires expensive or special equipment, advanced technology, and a long period of time to determine the deterioration of industrial oil. There was a problem that was limited. In the field of mechanical equipment such as a thermal power plant, there are many occasions where operation under a high operating rate and high load conditions is required. For this reason, it is difficult to apply the conventional technology, and there is a demand for an evaluation method that can reliably detect deterioration of industrial oil at an early stage, easily, quickly, and inexpensively. These problems exist not only in thermal power plants but also in the field where other mechanical equipment using industrial oil is used.

JP 2014-163709 A JP 2012-52903 A Japanese Patent Laid-Open No. 10-104223 JP-A-06-34541

  The present invention has been made in view of the above situation, and by adding water without adding chemical substances such as reagents, the industrial oil can be quickly, easily, inexpensively, quickly and reliably. An object of the present invention is to provide a method for evaluating the properties of industrial oils, and a property evaluating device for industrial oils, which are capable of evaluating the deterioration of industrial oils, in particular.

  Further, the present invention has been made in view of the above situation, and by adding water without adding a chemical substance such as a reagent, industrial oil can be quickly, easily, inexpensively, quickly and reliably. An object of the present invention is to provide an industrial oil circulation device equipped with an evaluation device capable of evaluating the above.

  The present invention according to claims 1 to 6 is based on the knowledge that industrial oils produce an acidic substance with deterioration, and pay attention to the fact that the acidic substance is hydrophilic. The deterioration of the industrial oil in the present invention is that water, dust, air (oxygen) and the like are mixed during use, and the function as the industrial oil is lowered. When industrial oil deteriorates, various machine troubles such as excessive increase in metal wear of used equipment are induced. That is, the property of the oil that causes the metal wear of the equipment to be used to increase or induce various machine troubles is regarded as deterioration.

  The property evaluation method for industrial oil of the present invention according to claim 1 for achieving the above object comprises mixing water for dissolving an acidic substance contained in the industrial oil with the industrial oil to be evaluated. The mixed liquid is separated into an oil layer and an aqueous layer by centrifugation, and the industrial oil is evaluated based on the hydrogen ion concentration index of the separated aqueous layer.

  In the present invention according to claim 1, the acidic substance is dissolved in water, and the water in which the acidic substance is dissolved is separated from normal industrial oil by centrifugal separation, and is used for industrial use based on the hydrogen ion index of the aqueous layer. By assessing the oil, the status of acidic substances in industrial oil is ascertained. Therefore, by adding water without adding chemical substances such as reagents, the evaluation of industrial oils, especially the judgment of deterioration of industrial oils, can be performed quickly, easily, inexpensively, quickly and reliably. It becomes possible to do.

  And the property evaluation method for industrial oil of the present invention according to claim 2 is the property evaluation method for industrial oil according to claim 1, wherein the hydrogen ion concentration index is an acidic value. It is judged that the oil is deteriorated.

  In the present invention according to claim 2, when the acidic substance contained in the industrial oil is dissolved in water, the hydrogen ion concentration index shows an acidic value. Therefore, the industrial oil contains the acidic substance. Judged to be deteriorated.

  The property evaluation method for industrial oil of the present invention according to claim 3 is the property evaluation method for industrial oil according to claim 1 or 2, wherein the industrial oil is a phosphate ester. It is characterized by.

  In this invention concerning Claim 3, evaluation (deterioration judgment) of phosphate ester can be performed using centrifugation.

  In order to achieve the above object, the industrial oil property evaluation apparatus according to claim 4 of the present invention includes a fractionating means for extracting industrial oil from an industrial oil system, and the fractionating means for extracting the industrial oil. A mixed liquid preparation means for mixing water in which an acidic substance contained in the industrial oil is dissolved with an industrial oil, and the mixed liquid mixed by the mixed liquid preparation means is separated into an oil layer and an aqueous layer by centrifugal force Centrifuge means, pH measurement means for measuring the hydrogen ion concentration index of the water layer separated by the centrifuge means, and information on the pH measurement means are inputted, and the hydrogen ion concentration index of the pH measurement means is inputted. And an evaluation means for judging that the industrial oil contains an acidic substance when the value is equal to or less than a predetermined value smaller than 7.

  In the present invention according to claim 4, the industrial oil is taken out by the fractionating means, the water in which the acidic substance contained in the industrial oil is dissolved is mixed by the mixed liquid preparing means, and the mixed liquid is obtained by the centrifugal separating means. The oil layer and the water layer are separated, and the hydrogen ion concentration index of the separated water layer is measured by the pH measuring means. When the value of the hydrogen ion concentration index measured by the pH measuring means is equal to or less than a predetermined value smaller than 7, the evaluating means determines that the industrial oil contains an acidic substance (industrial use) Oil degradation is judged).

  For this reason, it is possible to evaluate oil, in particular, to judge oil deterioration quickly, easily, inexpensively, and reliably by adding water without adding chemical substances such as reagents. Become.

  And the property evaluation apparatus of the industrial oil of this invention which concerns on Claim 5 WHEREIN: The property evaluation apparatus of the industrial oil of Claim 4 WHEREIN: The said industrial oil is phosphate ester, It is characterized by the above-mentioned. .

  In this invention which concerns on Claim 5, evaluation (deterioration judgment) of phosphate ester can be performed using a centrifugation means.

  Industrial oil is a circulation path for circulating industrial oil between the storage means and the equipment in which the oil is used, and the industrial oil is extracted and purified from the circulation path to purify the industrial oil. Industrial oil that circulates in a circulation system including purification means that returns to the storage means and distribution control means that controls extraction of industrial oil into the purification means is preferable. The sorting means is provided to be branched from the circulation path, and the evaluation means can cause the purification means to extract the industrial oil by the flow control means when judging the deterioration.

  As a result, industrial oil circulates in the circulation path, whereby industrial oil is circulated between the storage means and the equipment in which the industrial oil is used, and the industrial oil is extracted from the circulation path by the purification means. The purified industrial oil is returned to the storage means. The extraction of industrial oil into the purification means is controlled by the flow control means. A circulation system is formed by the circulation path and the purification means, and it is judged that the oil flowing through the circulation system or the like contains an acidic substance (determination of industrial oil is judged).

  An industrial oil circulation device according to claim 6 for achieving the above object comprises a storage means for storing industrial oil for operating an equipment, and the industrial oil between the storage means and the equipment. A circulation path to be circulated; a purification means for extracting and purifying the industrial oil from the circulation path; and returning the purified industrial oil to the storage means; and extracting the industrial oil to the purification means. Included in the industrial oil with respect to the distribution control means to be controlled, the fractionation means provided to be branched from the circulation path, and the industrial oil taken out by the fractionation means. The mixed liquid preparation means for mixing water in which the acidic substance is dissolved, the centrifugal separation means for separating the mixed liquid mixed by the mixed liquid preparation means into an oil layer and an aqueous layer by centrifugal force, and the centrifugal separation means. Measure the hydrogen ion concentration index of the water layer When the information of the pH measuring means and the pH measuring means are input and the value of the hydrogen ion concentration index of the pH measuring means is equal to or less than a predetermined value smaller than 7, the industrial oil contains an acidic substance. Evaluation means for judging that the industrial oil is deteriorated.

  In the present invention according to claim 6, the industrial oil circulates between the storage means and the equipment in which the industrial oil is used by circulating the industrial oil through the circulation path, and the purification means removes the industrial oil from the circulation path. Industrial oil is extracted and purified, and the purified industrial oil is returned to the storage means. The industrial oil is taken out by the sorting means, the water in which the acidic substance contained in the industrial oil is dissolved is mixed by the mixed liquid preparing means, and the mixed liquid is separated into the oil layer and the water layer by the centrifugal separating means. The hydrogen ion concentration index of the aqueous layer is measured by the pH measuring means. When the value of the hydrogen ion concentration index measured by the pH measuring means is equal to or less than a predetermined value smaller than 7, the evaluating means determines that the industrial oil contains an acidic substance (industrial use) Oil degradation is judged).

  For this reason, it is equipped with an evaluation device capable of evaluating industrial oils quickly, simply, inexpensively, quickly and reliably by adding water without adding chemical substances such as reagents. An industrial oil circulation device can be obtained.

  The property evaluation method for industrial oil and the property evaluation device for industrial oil of the present invention can be quickly, easily, inexpensively and quickly by adding water without adding chemical substances such as reagents. Thus, it is possible to reliably evaluate the oil, particularly to judge the deterioration of the oil.

  In addition, the industrial oil circulation apparatus of the present invention can be used to evaluate industrial oil quickly, simply, inexpensively, quickly and reliably by adding water without adding chemical substances such as reagents. In particular, it is possible to provide an industrial oil circulation device including an evaluation device capable of determining deterioration of industrial oil.

It is a whole block diagram of the circulation apparatus provided with the property evaluation apparatus of the industrial oil which concerns on one Example of this invention. It is a schematic block diagram of a centrifugation means. It is a conceptual diagram explaining the property evaluation method of the industrial oil which concerns on one Example of this invention. It is a graph showing a time-dependent change of a hydrogen ion concentration index (pH).

  FIG. 1 shows an overall schematic configuration of a circulation device provided with an evaluation device for performing a property evaluation method for industrial oil according to an embodiment of the present invention. The oil evaluated in the illustrated embodiment is an example of hydraulic oil (industrial oil: phosphate ester) of an actuator (equipment) that operates a valve member (steam valve) that performs output control of the steam turbine. .

  The steam turbine 1 includes a high-pressure turbine 2 that obtains driving force by introducing high-pressure steam from a boiler (not shown), an intermediate-pressure turbine 3 that obtains driving force by steam extracted from the high-pressure turbine 2, and an intermediate-pressure turbine 3. A low-pressure turbine 4 that obtains a driving force by the extracted steam is provided. A generator 5 is connected to the high-pressure turbine 2, the intermediate-pressure turbine 3, and the low-pressure turbine 4, and the generator 5 is operated by driving the high-pressure turbine 2, the intermediate-pressure turbine 3, and the low-pressure turbine 4 to obtain generated power. The steam that has finished work in the low-pressure turbine 4 is cooled and condensed by the condenser 6, and the condensed water obtained by the condenser 6 is supplied to a boiler (not shown).

  A steam valve 8 that performs output control of the steam turbine 1 is provided on the upstream side of the high-pressure turbine 2. That is, the flow rate of the steam sent to the high pressure turbine 2 is controlled by the operation of the steam valve 8. The steam valve 8 is opened and closed by an actuator 9 that is a device using hydraulic oil (phosphate ester) as industrial oil (evaluation target), and steam sent to the high-pressure turbine 2 by the opening and closing operation of the steam valve 8. Is controlled to control the output of the steam turbine 1.

  A circulation system 11 through which the hydraulic oil of the actuator 9 circulates is provided. The circulation system 11 is provided with a storage tank 12 as storage means for storing hydraulic oil, and the hydraulic oil is sent to the actuator 9 by a pump 14 through a circulation path 13. The hydraulic oil discharged from the actuator 9 is returned to the storage tank 12.

  The circulation system 11 is provided with purification means 16. That is, an extraction path 17 that branches from the circulation path 13 of the circulation system 11 and circulates to the storage tank 12 is provided, and the extraction path 17 is provided with a circulation pump 18 and a cleaning filter 19. A flow control valve 20 as a flow control means is provided in the extraction path 17 on the upstream side of the circulation pump 18. The hydraulic oil is sent to the purification means 16 by the flow rate control valve 20, and the hydraulic oil is purified by flowing through the cleaning filter 19.

  And the property evaluation apparatus of the industrial oil which performs evaluation (deterioration judgment) of the hydraulic fluid which distribute | circulates the circulation system 11 is provided. That is, it is evaluated by the evaluation device whether water, dust, air (oxygen) or the like is mixed in the hydraulic oil during use and the function as the hydraulic oil is not lowered. Specifically, in the evaluation device, the state of the hydraulic oil is not in a state where the metal wear of the equipment (actuator 9 or the like) used is excessive, or a mechanical trouble of the steam valve 8 is induced. It is evaluated whether or not it is the nature of the hydraulic oil.

  As an evaluation device, there is provided a sorting path 21 that branches from the circulation path 13 on the upstream side (storage tank 12 side) of the portion where the extraction path 17 branches. A mixed liquid preparation means 22 for mixing water in which an acidic substance contained in the hydraulic oil is dissolved is provided to the hydraulic oil taken out in the sorting passage 21, and the mixed liquid is adjusted by the mixed liquid preparation means 22. Centrifugal separation means 23 for separating the mixed liquid mixed by the mixed liquid preparation means 22 into an aqueous layer and an oil layer by centrifugal force is provided.

  A pH measuring means 24 (pH meter) for measuring the hydrogen ion concentration index of the water layer (water layer) separated by the centrifugal separating means 23 is provided (arranged), and the measurement information of the pH measuring means 24 is used as an evaluation means. Is input to the deterioration determination means 25. In the deterioration determination means 25, when the value of the hydrogen ion concentration index is, for example, a predetermined value smaller than 7 (for example, an arbitrary value between 3 and 6) or less, the water layer is acidic and the hydraulic oil is oxidized to the oxidizing substance. Is included, the deterioration of the hydraulic oil is determined. When the deterioration of the hydraulic oil is determined, for example, the flow rate control valve 20 is controlled by a command from the deterioration determination means 25, and the hydraulic oil is sent to the purification means 16 to execute the purification operation.

  If the value of the hydrogen ion concentration index is less than the predetermined value, set a lower value as the threshold value. If the value of the hydrogen ion concentration index falls below the threshold value, stop the equipment or plant and operate. It is also possible to change the oil.

  Based on FIG. 2, the structure of the centrifugation means 23 is demonstrated. FIG. 2 shows an appearance representing a schematic configuration of the centrifugal separator 23.

  As shown in the figure, a rotary table 28 is supported on the main body 27 so as to be rotatable at a predetermined rotational speed. The rotary table 28 is provided with a plurality of holding hole portions 29 for holding the container 30 (three places in the illustrated example), and the container 30 containing the mixed liquid is accommodated in the holding hole portion 29 so that the container 30 The lower part is held in a state of being inclined outward in the circumferential direction of the rotary table 28.

  The configuration of the centrifugal separator 23 is not limited to that shown in FIG. 2. If the mixed liquid can be separated into a water layer and an oil layer by centrifugal force, the rotation mechanism and the rotational speed can be set. Is optional.

  In this state, the turntable 28 can be rotated at a predetermined rotation speed (for example, 500 rpm to 3000 rpm). For example, by rotating for several tens of seconds, the water layer (water layer 31 (see FIG. 3)) in which the hydrophilic acidic substance is dissolved by centrifugal force acting downward inside the container 30 and normal operation The oil layer (oil layer 32 (see FIG. 3)) is forcibly separated. In this case, since the phosphate ester has a higher specific gravity than water, the oil layer 32 exists below and the water layer 31 exists above.

  The property evaluation method (property evaluation device) for industrial oils of the above-described examples is based on the knowledge that industrial fluids including phosphate esters produce acidic substances with deterioration. Focuses on the substance being hydrophilic.

  That is, the phosphoric acid ester (see the following formula (1)) as the hydraulic oil gradually deteriorates with use and is hydrolyzed, whereby a hydrophilic acidic substance ((a) to (a) in the following formula (2)). (See (d)). In some cases, moisture or dust mixed in during use accelerates deterioration and promotes generation of acidic substances. The acidic substance is not limited to the structure exemplified here.

（Ｒ_１〜Ｒ_５は、それぞれ独立して、Ｈ、ＣＨ_３、ＯＨの何れかを表す。）

(R _{1 to} R ₅ each independently represents any of H, CH ₃ , and OH.)

（Ｒ_１〜Ｒ_５は、それぞれ独立して、Ｈ、ＣＨ_３、ＯＨの何れかを表す。）

(R _{1 to} R ₅ each independently represents any of H, CH ₃ , and OH.)

  FIG. 3 shows a conceptual situation of the evaluation apparatus (evaluation means).

  As shown in FIG. 3, the mixed liquid in the container 30 is composed of a water layer (water layer 31) in which a hydrophilic acidic substance is dissolved and a normal working oil layer (oil layer 32) by centrifugal force. Separated, the water layer 31 and the oil layer 32 exist. In this case, since the phosphate ester has a higher specific gravity than water, the oil layer 32 exists below and the water layer 31 exists above. The hydrogen ion concentration index of the aqueous layer 31 separated in the container 30 is measured by the pH measuring means 24 (pH is detected). Information on the measured pH is sent to the deterioration determining means 25 to determine deterioration.

  In other words, the acidic substance produced by the degradation is dissolved in water, the mixed liquid is separated into the water layer 31 and the oil layer 32 by centrifugal force, and the pH of the separated water layer 31 is evaluated, so that it exists in the hydraulic oil. The deterioration of the hydraulic oil is judged by grasping the concentration of the acidic substance. When it is determined that the hydraulic oil has deteriorated, an alarm is generated by sound or display.

  Based on FIG. 4, the change with time of the pH of the phosphoric acid ester as the hydraulic oil will be described. FIG. 4 shows the change in pH with the lapse of the usage time (month) of the phosphate ester, that is, the change in the acidity level indicated by the increase in acidic substances.

  In the case of hydraulic oil that is nearly new (time t0), the pH value of the hydraulic oil is close to neutrality, for example, slightly lower than 7. In the case of hydraulic oil used for several months (time t1), acidic substances increase and the pH value of the hydraulic oil becomes a value close to 6, for example. Furthermore, in the case of hydraulic oil that has been used for several months, for example, from 10 months to 15 months (time t2, t3), acidic substances increase due to the progress of hydrophilic degradation, and the pH value of hydraulic oil is, for example, The value is less than 6.

  In the case of a hydraulic oil having a problem due to the deterioration of the hydraulic oil, the acidic substance is greatly increased by the progress of the hydrophilic deterioration, and the pH value of the hydraulic oil becomes a value close to 5, for example. For this reason, it is possible to recognize the use limit of the hydraulic oil by setting the pH value (slightly high value) of the hydraulic oil in which the malfunction occurred as a threshold value and detecting the pH.

  Therefore, in the deterioration determination unit 25, when the pH value is equal to or less than a predetermined value smaller than 7, for example, an arbitrary value between 3 and 6, the aqueous layer 31 is acidic and oxidized to hydraulic oil. It is possible to judge the deterioration of the hydraulic oil, assuming that the substance is contained.

  In the above-described circulation device that circulates the hydraulic oil (phosphate ester) of the actuator 9 for operating the steam valve 8 of the steam turbine 1, the hydraulic oil circulates through the circulation path 13 of the circulation system 11, so that the storage tank Hydraulic fluid is circulated between the actuator 12 and the actuator 9. When judging the deterioration of the hydraulic oil, the hydraulic oil is taken out from the sorting channel 21 and the mixed liquid preparation means 22 mixes water in which the acidic substance contained in the hydraulic oil is dissolved into a mixed liquid.

  The mixed liquid mixed by the mixed liquid preparation means 22 is separated into an aqueous layer 31 and an oil layer 32 by the centrifugal separator 23. That is, as shown in FIG. 2, the container 30 is accommodated in the holding hole 29 of the centrifugal separator 23, and the rotary table 28 is rotated at a predetermined rotational speed (for example, 500 rpm to 3000 rpm) for several tens of seconds. As a result, a centrifugal force acts downward in the container 30, and as shown in FIG. 3, a water layer (water layer 31) in which a hydrophilic acidic substance is dissolved and a normal working oil layer (oil layer) 32) is reliably separated.

  When the pH of the aqueous layer 31 of the mixed liquid is measured by the pH measuring unit 24 and the pH value measured by the pH measuring unit 24 is equal to or smaller than a predetermined value smaller than 7, the deterioration determining unit 25 converts the pH of the mixed oil into hydraulic fluid. It is judged that it has deteriorated due to the inclusion of acidic substances. When it is determined that the hydraulic oil has deteriorated, an alarm such as sound or display is issued, and for example, the operator of the power generation facility is notified that the hydraulic oil has deteriorated.

  When it is determined that the hydraulic oil has deteriorated, the deterioration determination means 25 controls the operation of the flow rate control valve 20 of the purification means 16 so that the hydraulic oil is guided to the extraction path 17 (the amount of the hydraulic oil to be guided is increased). State).

  Further, when the use limit of the hydraulic oil is recognized based on the determination of the deterioration of the hydraulic oil, the operation of the steam turbine 1 and the circulation system 11 is stopped, and necessary maintenance such as replacement of the hydraulic oil is performed.

  In the above-described industrial oil property evaluation apparatus (property evaluation method), water that dissolves acidic substances generated by deterioration of hydraulic oil is mixed with hydraulic oil, and the mixed liquid is mixed into water layer 31 and oil layer 32 by centrifugal force. Separate, evaluate the pH of the water layer 31 in which the hydrophilic acidic substance, that is, the acidic substance generated by the degradation of hydrolysis is dissolved, and grasp the concentration of the acidic substance present in the hydraulic oil to operate. Judging oil deterioration.

  Therefore, by adding water without adding chemical substances such as reagents, the evaluation of industrial oils, especially the judgment of deterioration of industrial oils, can be performed quickly, easily, inexpensively, quickly and reliably. It becomes possible to do.

  In addition, since the industrial oil circulation device described above is provided with the above-described evaluation device and circulates the hydraulic oil, without adding chemical substances such as reagents, it is possible to quickly and simply add water. It is possible to provide a circulation device including an evaluation device that can perform the evaluation of hydraulic oil, that is, the deterioration determination, quickly and reliably at low cost.

  In the above-described embodiments, phosphate oil is used as an example of hydraulic oil (industrial oil), but various industrial oils such as other hydraulic oil (hydraulic hydraulic oil) and lubricating oil are evaluated. It is possible to make a target for (deterioration judgment). That is, as long as it is an industrial oil that produces a hydrophilic acidic substance with deterioration, the property evaluation method and property evaluation device of the present invention can be basically used and applied to the circulation device of the present invention. be able to.

DESCRIPTION OF SYMBOLS 1 Steam turbine 2 High pressure turbine 3 Medium pressure turbine 4 Low pressure turbine 5 Generator 6 Condenser 8 Steam valve 9 Actuator 11 Circulation system 12 Storage tank 13 Circulation path 14 Pump 16 Purifying means 17 Extraction path 18 Circulation pump 19 Washing filter 20 Flow rate Control valve 21 Sorting path 22 Mixed liquid preparation means 23 Centrifugation means 24 pH measurement means 25 Degradation judgment means 27 Main body 28 Rotary table 29 Holding hole 30 Container 31 Water layer 32 Oil layer

Claims (6)

Water for dissolving the acidic substance contained in the industrial oil is mixed with the industrial oil to be evaluated, the mixed liquid is separated into an aqueous layer and an oil layer by centrifugation, and hydrogen ions in the separated aqueous layer are separated. A method for evaluating the properties of industrial oil, characterized in that the industrial oil is evaluated based on a concentration index. In the property evaluation method of the industrial oil of Claim 1,
When the hydrogen ion concentration index is an acidic value, it is determined that the industrial oil is deteriorated. In the property evaluation method of the industrial oil according to claim 1 or 2,
The industrial oil is a phosphoric acid ester. The property evaluation method for industrial oil, characterized in that: A fractionating means for extracting industrial oil from the industrial oil system;
A mixed liquid preparation means for mixing water in which an acidic substance contained in the industrial oil is dissolved with the industrial oil taken out by the sorting means;
Centrifuge means for separating the mixed liquid mixed by the mixed liquid preparation means into an aqueous layer and an oil layer by centrifugal force;
PH measurement means for measuring a hydrogen ion concentration index of the aqueous layer separated by the centrifugal separation means;
Evaluation that judges that the industrial oil contains an acidic substance when the information of the pH measuring means is inputted and the value of the hydrogen ion concentration index of the pH measuring means is not more than a predetermined value smaller than 7. And an industrial oil property evaluation device. The property evaluation apparatus for industrial oil according to claim 4,
The industrial oil is a phosphate ester. An industrial oil property evaluation apparatus, wherein: Storage means for storing industrial oil for operating the equipment;
A circulation path for circulating the industrial oil between the storage means and the device;
Purification means for extracting and purifying the industrial oil from the circulation path, and returning the purified industrial oil to the storage means;
Distribution control means for controlling extraction of the industrial oil to the purification means;
A preparatory means for branching out from the circulation path and taking out the industrial oil;
A mixed liquid preparation means for mixing water in which an acidic substance contained in the industrial oil is dissolved with the industrial oil taken out by the sorting means;
Centrifuge means for separating the mixed liquid mixed by the mixed liquid preparation means into an aqueous layer and an oil layer by centrifugal force;
PH measurement means for measuring a hydrogen ion concentration index of the aqueous layer separated by the centrifugal separation means;
When the information of the pH measuring means is input and the value of the hydrogen ion concentration index of the pH measuring means is equal to or less than a predetermined value less than 7, the industrial oil is considered to contain acidic substances. An industrial oil circulation device comprising: an evaluation means for judging that the oil has deteriorated.

Images