JP2018063218A - Oil state control device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an oil state control device that appropriately performs reduction (regeneration) of an antioxidant when controlling a state of antioxidant-containing oil.SOLUTION: An oil state control device for controlling a state of oil which contains an antioxidant and is used as lubricant or hydraulic oil, comprises a content measurement part for measuring a content of an antioxidant in oil, and a reduction part for reducing oxide in the antioxidant. The reduction part includes a hydrogen supply part for supplying hydrogen to oil. The hydrogen supply part controls a hydrogen supply amount to oil on the basis of a measurement result of the content of the antioxidant measured by the content measurement part. Therefore, the oil state control device can appropriately supply hydrogen to be used to regenerate (reduce) oxide in the antioxidant, and appropriately reduce (regenerate) the oxide in the antioxidant when controlling a state of antioxidant-containing oil.SELECTED DRAWING: Figure 1

Description

  The present disclosure relates to an oil state control device that controls an oil state.

  For example, the lubricating oil supplied to the turbine and the hydraulic oil used for hydraulic control (hydraulic hydraulic oil: hydraulic hydraulic oil) are repeatedly used by circulation, etc., but the main component is changed by the heat and oxidative stress accompanying the use. Organic compounds are degraded and deteriorated by oxidation. In order to prevent this, an antioxidant is generally added to the lubricating oil and hydraulic oil.

  Antioxidants, for example, prevent oxidation of organic compounds by themselves being oxidized, the amount of antioxidants having an antioxidant function decreases with use, and deterioration of lubricating oil or hydraulic oil is also large. It will become.

  Therefore, a method has been proposed in which a antioxidant having a wall surface made of palladium / silver alloy (PdAg alloy) is used to reduce the oxidized antioxidant with active hydrogen to restore the function of the antioxidant (patent). Reference 1).

JP 2009-263263 A

  However, the rate of oil oxidation (deterioration) is not always constant due to the difference in the oil usage environment and deterioration over time, and the oxidation rate of antioxidants is not always constant. In such a case, there is a possibility that the supply amount of hydrogen becomes inappropriate.

  For example, when the supply amount of hydrogen is insufficient, the reduction rate (regeneration rate) of the antioxidant is slower than the appropriate rate, and there is a possibility that the oxidation (deterioration) of the oil cannot be suppressed. In addition, when the supply amount of hydrogen becomes excessive, the reduction rate (regeneration rate) of the antioxidant can be maintained at an appropriate rate and the oxidation (deterioration) of the oil can be suppressed, but hydrogen is wasted. become. In addition, there is a concern that hydrogen that is not used for the reduction is mixed in the oil as a gas, the oil film thickness becomes unstable, and the hydraulic pressure becomes unstable.

  Accordingly, an object of one aspect of the present disclosure is to provide an oil state control device that appropriately reduces (regenerates) an antioxidant when controlling the state of an oil containing the antioxidant.

  An oil state control device according to one aspect of the present disclosure is an oil state control device that controls an oil state that is an oil containing an antioxidant and that is used as a lubricating oil or a hydraulic oil. And a reduction unit.

  The content rate measuring unit is configured to measure the content rate of the antioxidant in the oil. The reducing unit is configured to reduce the oxide of the antioxidant. The reduction unit includes a hydrogen supply unit.

  The hydrogen supply unit is configured to supply hydrogen to the oil. The hydrogen supply unit is configured to control the hydrogen supply amount to the oil based on the measurement result of the content rate of the antioxidant by the content rate measurement unit.

  This oil state control device is configured, for example, to supply a predetermined amount of hydrogen to the oil when the measurement result of the antioxidant content (concentration) falls below a predetermined determination value. Also good. According to such an oil state control device, hydrogen can be supplied to the oil each time the content (concentration) of the antioxidant in the oil falls below the determination value.

  Therefore, according to this oil state control device, it is possible to appropriately supply hydrogen used for the regeneration (reduction) of the antioxidant, and in controlling the state of the oil containing the antioxidant, Reduction (regeneration) can be performed appropriately.

  In addition, as a measuring method of the content rate of antioxidant in a content rate measurement part, the measuring method using an infrared spectrophotometer (FT-IR), the measuring method using a gas chromatograph, and an oxidation stability test are used, for example. Measurement methods, measurement methods using RULER View, and the like can be mentioned.

  Further, the reducing unit may include a temperature control unit that adjusts the oil reduction processing temperature. Furthermore, the reduction unit may include an intake amount adjusting unit that adjusts the intake amount of the oil to be controlled. Factors for adjusting the reduction rate of the antioxidant include a hydrogen supply amount, a reduction treatment temperature, an oil intake amount, and the like. By appropriately adjusting these factors, the reduction rate of the antioxidant can be arbitrarily adjusted.

In the above-described oil state control device, the hydrogen supply unit may control the amount of hydrogen supplied to the oil based on the change state of the content rate of the antioxidant.
In other words, by using the change state of the antioxidant content rate, not the instantaneous value of the antioxidant content rate, the hydrogen supply amount is set to an appropriate value before the antioxidant content rate reaches the abnormal value. Can be controlled.

  Therefore, according to this oil state control device, it is possible to control the hydrogen supply amount to an appropriate value before the antioxidant content reaches an abnormal value, and further reduction (regeneration) of the antioxidant. Can be performed appropriately.

  In addition, as a change state of the content rate of antioxidant, the change rate of content rate is mentioned, for example. For example, if it is determined that the change rate (decrease rate) of the content rate (concentration) of the antioxidant is faster than a predetermined target speed, it is determined that the hydrogen supply amount is insufficient, and the hydrogen supply amount is reduced. May increase. Thereby, the reduction rate of the antioxidant by hydrogen can be increased, and the rate of change (decrease rate) in the content (concentration) of the antioxidant can be reduced.

  Further, when it is determined that the change rate (decrease rate) of the antioxidant content (concentration) is equal to the predetermined target rate, it is determined that the hydrogen supply amount is excessive, and the hydrogen supply amount is reduced. May be. Thereby, wasteful consumption of hydrogen can be suppressed while maintaining the reduction rate of the antioxidant by hydrogen at an appropriate rate.

In the above-described oil state control device, the hydrogen supply unit may control the hydrogen supply amount per unit time for the oil based on the measurement result of the content rate of the antioxidant by the content rate measurement unit.
When supplying hydrogen to oil, a method of controlling the hydrogen supply amount per unit time is used, so that a certain amount of hydrogen is supplied each time a predetermined condition is satisfied (for example, every time the antioxidant content falls below a judgment value). Compared with the method of supplying hydrogen, the hydrogen supply amount can be controlled more finely.

Therefore, according to this oil state control device, it becomes possible to control the hydrogen supply amount to a finer and appropriate value, and to further reduce (regenerate) the antioxidant appropriately.
In the above-described oil state control device, the hydrogen supply unit may include a hydrogen separation membrane, and may be configured to supply hydrogen to the oil via the hydrogen separation membrane. By adopting a form using a hydrogen separation membrane as a form of supplying hydrogen, it becomes possible to supply hydrogen continuously.

  Other supply forms include a form in which hydrogen gas is supplied as it is, a form in which hydrogen generated using a catalyst is supplied, and a form in which hydrogen gas generated by electrolysis is supplied.

In the oil state control apparatus described above, the antioxidant may include at least one of an amine-based antioxidant and a phenol-based antioxidant.
Even when such an antioxidant is used, hydrogen used for the regeneration (reduction) of the antioxidant can be appropriately supplied, and the reduction (regeneration) of the antioxidant can be performed appropriately.

In the above-described oil condition control device, the oil may be a lubricating oil or a hydraulic oil used in a power plant turbine.
Even in such applications for controlling the state of oil, it is possible to appropriately supply hydrogen used for the regeneration (reduction) of the antioxidant, and it is possible to appropriately perform the reduction (regeneration) of the antioxidant.

  According to the oil state control device of the present disclosure, it is possible to appropriately supply hydrogen used for the regeneration (reduction) of the antioxidant, and in controlling the state of the oil containing the antioxidant, Reduction (regeneration) can be performed appropriately.

It is a schematic diagram of the electric power generation system provided with the oil state control apparatus. (A) is typical sectional drawing of a hydrogen supply module, (b) is a typical front view which shows the state which connected the metal coupling to the hydrogen supply module. It is a partial expanded sectional view of the hydrogen supply module of FIG. It is a schematic diagram of the measurement part in an oil state control apparatus. It is explanatory drawing which shows the waveform which represented the density | concentration detection result in the detector typically. It is explanatory drawing which shows the correlation with the density | concentration and peak area of antioxidant which were produced based on the measurement result using the lubricating oil containing antioxidant. It is a flowchart which shows the processing content of the condition setting process performed in a reduction | restoration control part. It is a schematic diagram of the test apparatus used in the Example. It is the measurement result which measured the density | concentration (content rate) of antioxidant with respect to elapsed time using the test apparatus.

Embodiments to which the present invention is applied will be described below with reference to the drawings.
In addition, this invention is not limited to the following embodiment at all, and it cannot be overemphasized that various forms may be taken as long as it belongs to the technical scope of this invention.

[1. First Embodiment]
[1-1. overall structure]
As a first embodiment, an oil state control device 5 provided in the power generation system 1 will be described.

As shown in FIG. 1, the oil state control device 5 controls the state of the lubricating oil used in the power generation system 1. This lubricating oil contains an antioxidant.
The power generation system 1 includes a turbine generator 3 in which lubricating oil is used, an oil state control device 5 that controls the state of the lubricating oil, and a circulation that circulates the lubricating oil between the turbine generator 3 and the oil state control device 5. A passage 7 and an oil tank 9 that is disposed in the circulation passage 7 and temporarily stores lubricating oil are provided. The oil tank 9 is provided as a part of the circulation path 7. The circulation path 7 includes a first pipe 7a, a second pipe 7b, a third pipe 7c, and a fourth pipe 7d.

  In the power generation system 1, the lubricating oil used in the turbine generator 3 is supplied from the turbine generator 3 to the oil tank 9 via the first pipe 7a, and is in an oil state from the oil tank 9 via the second pipe 7b. It is supplied to the reduction tank 11 of the control device 5. The lubricating oil in which the antioxidant is reduced by the oil state control device 5 is returned from the reduction tank 11 of the oil state control device 5 to the oil tank 9 through the third pipe 7c, and from the oil tank 9 to the fourth pipe 7d. To the turbine generator 3. Between the turbine generator 3 and the oil tank 9, known devices (not shown) such as a heat exchanger and a centrifugal separator are appropriately disposed.

  Thus, for example, during operation of the turbine generator 3, the lubricating oil circulates between the turbine generator 3, the circulation path 7 (including the oil tank 9), and the oil state control device 5, and is used for a certain period of time. After replacement and disposal.

  In the present embodiment, the target is lubricating oil (engine oil, turbine oil) used in the turbine generator 3, but the oil to be controlled in the present disclosure is not limited to lubricating oil, and is intended for hydraulic oil. It is good. Hydraulic oil includes metalworking oil. The type of lubricating oil or hydraulic oil may be mineral oil, synthetic oil or partially synthetic oil.

[1-2. Oil state control device]
Next, the oil state control device 5 will be described.
The oil state control device 5 supplies the hydrogen to the lubricating oil containing the antioxidant, and regenerates the antioxidant by reduction using hydrogen (that is, by performing a reduction treatment), thereby changing the state of the lubricating oil. Control. The oil state control device 5 can also be used as a device for extending the life of a lubricating oil by reducing (regenerating) an antioxidant that has lost its antioxidant function in the lubricating oil using hydrogen. .

  The oil state control device 5 includes a reduction tank 11 that is a container for storing lubricating oil, a measuring unit 12 that measures the content (concentration) of the antioxidant in the lubricating oil, and an oxide of the antioxidant contained in the lubricating oil. The reduction part 13 which reduces (regenerates) and the cooling device 14 which is arrange | positioned at the 3rd piping 7c and cools lubricating oil is provided.

  The reduction unit 13 includes a reduction control unit 15 that controls the reduction state of the antioxidant, a hydrogen supply unit 16 that supplies hydrogen to the lubricating oil, and a temperature control unit 20 that controls the temperature of the lubricating oil in the reduction tank 11. And comprising.

  The reduction control unit 15 controls the reduction state of the antioxidant based on the content (concentration) of the antioxidant detected by the measurement unit 12. The reduction control unit 15 is an electronic control device including a known microcomputer, and based on the concentration of the antioxidant detected by the measurement unit 12, the target value of the hydrogen generation amount in the hydrogen supply unit 16 and the temperature control unit The target value of the reduction processing temperature by 20 is calculated. The reduction control unit 15 notifies the hydrogen supply unit 16 of the target value of the hydrogen generation amount, and notifies the temperature control unit 20 of the target value of the reduction processing temperature.

  The hydrogen supply unit 16 includes a hydrogen supply module 17 that is disposed in the reduction tank 11 and supplies hydrogen to the lubricating oil, and a supply amount control unit 19 that controls the hydrogen supply amount by the hydrogen supply module 17. The supply amount control unit 19 controls the pressure of the gas supplied to the hydrogen supply module 17. The supply amount control unit 19 is an electronic control device including a known microcomputer, and controls the pressure of the gas supplied to the hydrogen supply module 17 based on the target value of the hydrogen generation amount calculated by the reduction control unit 15. It is configured as follows. The supply amount control unit 19 controls the pressure of the gas supplied to the hydrogen supply module 17 to bring the hydrogen generation amount in the hydrogen supply module 17 close to the target value. The configuration of the hydrogen supply module 17 will be described later.

  The temperature control unit 20 includes a temperature sensor 21 that detects the temperature of the lubricating oil in the reducing tank 11, a heater 22 that is disposed around the reducing tank 11 and heats the lubricating oil in the reducing tank 11, and the temperature sensor 21. And a heat generation control unit 23 that controls the amount of heat generated by the heater 22 in accordance with the detected temperature.

  The heat generation control unit 23 controls the temperature of the lubricating oil in the reduction tank 11 to a temperature suitable for the reduction process (reduction process temperature). The heat generation control unit 23 is an electronic control device including a known microcomputer, and is configured to control an applied voltage or the like of the heater 22 based on the temperature of the lubricating oil detected by the temperature sensor 21. The heat generation control unit 23 controls the applied voltage or the like of the heater 22 to control the lubricating oil temperature to a target reduction temperature (here, a temperature range of 60 ° C. to 120 ° C.). The reduction process temperature is set based on the target value of the reduction process temperature calculated by the reduction control unit 15.

[1-3. Antioxidant]
The antioxidant added to the lubricating oil or hydraulic oil will be described.
Lubricating oil and hydraulic oil cause a chain reaction called so-called auto-oxidation with use of oxygen, heat, metal ions, irradiation energy such as ultraviolet rays, free radicals generated by combustion, and the like. As a result, a deteriorated product is generated, and adverse effects such as an increase in viscosity, sludge formation, metal corrosion, foaming, fading and filter clogging occur. In particular, oxidation is significant in a lubricating oil that comes into contact with a metal under a high temperature condition in a turbine or the like. In order to prevent such oxidation, an antioxidant is generally added to the lubricating oil and hydraulic oil.

  As the antioxidant used in the power generation system 1 of this embodiment, those classified as a chain inhibitor or a peroxide decomposer are preferable. The chain inhibitor suppresses the chain of the oxidation reaction by generating peroxy radicals. Examples of the chain inhibitor include 2,6-di-t-butylparacresol (DBPC), P, P′-dioctyldiphenylamine, and the like. The peroxide decomposer decomposes hydroperoxide (ROOH) generated during the oxidation reaction into a stable compound, thereby suppressing the chain of the oxidation reaction. Examples of the peroxide decomposing agent include zinc dialkyldithiophosphate and dibenzyl disulfide (DBDS).

  Further, as the antioxidant, amine-based or phenol-based antioxidants that have a high antioxidant effect on lubricating oil or hydraulic oil and are liable to cause a reduction reaction with active hydrogen are preferable. As the amine-based antioxidant and the phenol-based antioxidant, those represented by the following formulas (1) to (6) can be preferably used.

アミン系酸化防止剤の具体例としては、例えばＰ，Ｐ’−ジオクチルジフェニルアミン等が挙げられる。また、フェノール系酸化防止剤の具体例としては、例えばジブチルヒドロキシトルエン、ＤＢＰＣ、ＤＢＤＳ等が挙げられる。なお、酸化防止剤の添加量は、一般に潤滑油又は油圧油に対し０．０１質量％以上１質量％以下である。

Specific examples of the amine-based antioxidant include P, P′-dioctyldiphenylamine and the like. Specific examples of the phenolic antioxidant include dibutylhydroxytoluene, DBPC, DBDS and the like. In addition, generally the addition amount of antioxidant is 0.01 mass% or more and 1 mass% or less with respect to lubricating oil or hydraulic oil.

[1-4. Hydrogen supply module]
Next, the hydrogen supply module 17 will be described.
As shown in FIGS. 2A and 3, the hydrogen supply module 17 is a porous support 25 having a large number of pores therein, and is supported on the outer surface of the porous support 25 and is a hydrogen separation metal. And a hydrogen separation metal layer 27 containing palladium or a palladium alloy. By supplying the hydrogen-containing gas G to the internal space 29 of the porous support 25 of the hydrogen supply module 17, H radicals (that is, active hydrogen) showing a strong reducing power are generated on the outer surface of the hydrogen separation metal layer 27. .

  The porous support 25 of the hydrogen supply module 17 has an internal space 29 along its central axis, and one of the axial directions (front end side: the lower side of FIG. 2) is closed, and the other (rear end side: FIG. 2). This is a bottomed cylindrical member having an opening 31 above (above).

  Specifically, the porous support 25 includes a bottomed cylindrical porous base 33 having an opening 32 at the end on the rear end side, and a cylindrical shape connected to the end on the rear end side of the porous base 33. And a porous layer 37 (see FIG. 3) that covers the entire outer surface of the porous base portion 33 and a part of the dense portion 35.

  Since the porous base portion 33 and the porous layer 37 are porous, the portion that is not filled with the hydrogen separation metal has a property of transmitting the hydrogen-containing gas G (that is, gas permeability). On the other hand, the dense portion 35 does not have gas permeability.

Examples of the hydrogen-containing gas G include reformed gas produced by bringing natural gas and water vapor into contact with a catalyst, and pure hydrogen gas. In this embodiment, pure hydrogen gas is used.
As a constituent material of the porous support 25, ceramic or metal can be used. Suitable ceramics include, for example, zirconia, alumina, magnesia, ceria, doped ceria, glass and the like. Among these, zirconia having a thermal expansion coefficient close to that of palladium or a palladium alloy and low reactivity with palladium or a palladium alloy is particularly preferable. Examples of the porous ceramic using zirconia include yttria stabilized zirconia (YSZ).

  As a minimum of average thickness of porous support 25, 100 micrometers is preferred, 500 micrometers is more preferred, and 1 mm is still more preferred. The upper limit of the average thickness is preferably 2 mm. If the average thickness is smaller than the lower limit, the mechanical strength of the entire module may be insufficient, and the hydrogen separation metal layer 27 may have to be thickened.

As a minimum of the porosity of porous base 33 and porous layer 37, 10% is preferred and 30% is more preferred. On the other hand, the upper limit of the porosity is preferably 90%, more preferably 50%. The specific surface area of the porous base portion 33 and the porous layer 37 is preferably 50 cm ² / g or more and 400 cm ² / g or less.

  When the porosity or specific surface area is smaller than the lower limit, the proportion of pores becomes small, and the gas permeability may be lowered. On the other hand, if the porosity or specific surface area is larger than the upper limit, the mechanical strength of the porous support 25 may be reduced and may be easily damaged. Note that the porous base portion 33 and the porous layer 37 may have a region where the material, the porosity, and the like change in the thickness direction (that is, the radial direction).

  The hydrogen separation metal layer 27 is a layer that selectively permeates hydrogen of the hydrogen-containing gas, and includes palladium (Pd) or a palladium alloy. Specifically, the hydrogen separation metal layer 27 is preferably formed using palladium or a palladium alloy. By using palladium, hydrogen can be efficiently transmitted. Moreover, it is preferable to use a palladium alloy from the viewpoint of suppressing hydrogen embrittlement.

  As the palladium alloy, those containing palladium as a main component and further containing gold, silver, copper or a combination thereof are preferable. Specifically, palladium silver alloy (PdAg alloy), palladium copper alloy (PdCu alloy), palladium gold An alloy (PdAu alloy) and the like are mentioned, and a palladium silver alloy excellent in hydrogen permeability is particularly preferable. In addition to these metals, palladium alloys include platinum group metals other than palladium (platinum (Pt), rhodium (Rh), ruthenium (Ru), iridium (Ir), osmium (Os)), indium (In), Gallium (Ga), tin (Sn), zinc (Zn), or the like may be included.

  The lower limit of the average thickness of the hydrogen separation metal layer 27 is preferably 1 μm. On the other hand, the upper limit of the average thickness is preferably 30 μm, and more preferably 15 μm. If the average thickness is smaller than the lower limit, pinholes are likely to occur, and the denseness may be insufficient. In that case, not only active hydrogen but also hydrogen may be supplied as a gas through a pinhole. On the other hand, if the average thickness is larger than the upper limit, hydrogen permeability may be reduced and the cost may be increased.

  Further, as shown in FIG. 3, the hydrogen separation metal layer 27 may be configured to close the pores on the outer surface side of the porous layer 37. Alternatively, the hydrogen separation metal may be filled in the pores of the porous layer 37 so that the hydrogen separation metal is not exposed on the surface of the porous layer 37.

  As shown in FIG. 3, the hydrogen supply module 17 may further include a catalyst metal layer 39 on the outer surface of the hydrogen separation metal layer 27. The catalyst metal layer 39 contains palladium and promotes an addition reaction of hydrogen generated from the hydrogen separation metal layer 27 (that is, a hydrogenation reaction). Therefore, the regeneration of the antioxidant can be promoted by having the catalytic metal layer 39. The catalyst metal layer 39 may be disposed so as to be dispersed on the outer surface of the hydrogen separation metal layer 27.

  In the hydrogen supply module 17, as shown in FIG. 2B, a metal joint 48 including a mounting bracket, a pressing bracket, a sealing material, a fixing bracket, and the like is screwed to the dense portion 35. An introduction pipe 49 for introducing the hydrogen-containing gas G is connected through the metal joint 48.

  The arrangement place of the hydrogen supply module 17 is not particularly limited, and is not limited to the form in which the hydrogen supply module 17 is arranged in the reduction tank 11 as described above. For example, the hydrogen supply module 17 may be disposed inside the oil tank 9 for storing oil.

[1-5. Measurement unit]
The measuring unit 12 analyzes the lubricating oil temporarily stored in the oil tank 9 using a gas chromatograph, and measures the concentration (content ratio) of the antioxidant in the lubricating oil based on the analysis result. The measurement unit 12 is fixed to the oil tank 9.

As shown in FIG. 4, the measurement unit 12 includes a carrier gas supply unit 41, a sample extraction tube 42, a sample injection unit 43, a column 44, and a detection unit 45.
The carrier gas supply unit 41 adjusts the carrier gas (He, N 2, H 2, etc.) to a predetermined pressure and then supplies the carrier gas to the sample injection unit 43. The carrier gas flows in the order of the sample injection part 43, the column 44, and the detection part 45.

The sample extraction pipe 42 constitutes a supply path for supplying a sample extracted from the lubricating oil stored in the oil tank 9 to the sample injection unit 43.
The sample injection unit 43 is configured to vaporize the sample introduced from the sample extraction tube 42 in a high-temperature vaporization chamber and supply the vaporized sample to the column 44 together with the carrier gas. That is, the sample flows in the order of the column 44 and the detection unit 45 together with the carrier gas in a vaporized state.

  The column 44 includes an elongated pipe having a filler disposed therein, and a thermostat for maintaining the pipe at a predetermined temperature. The column 44 divides the carrier gas and sample introduced into the pipe into components and supplies them to the detection unit 45. Since each component has a different passage time for the pipe depending on its size, the required time to reach the outlet of the pipe differs for each component. That is, the column 44 can classify the various components contained in the lubricating oil sample by discharging from the piping at different timings for each component.

  The detection unit 45 detects the concentration of the gas (carrier gas and sample) divided for each component in the column 44. As described above, since the components 44 are discharged from the column 44 at different timings, the time from when the sample is injected into the sample injection unit 43 until the specific component reaches the detection unit 45 (holding time: RT) is Different for each component.

  The concentration detection result in the detection unit 45 can be expressed as a schematic waveform as shown in FIG. 5, for example. This waveform is an example of a waveform when a sample containing a first component with a retention time RT of time T1 and a second component with a retention time RT of time T2 is analyzed. The peak area S1 in the peak waveform of the predetermined period including the time T1 indicates a value corresponding to the concentration (content ratio) of the first component, and the peak area S2 in the peak waveform of the predetermined period including the time T2 is the second component. A value corresponding to the concentration (content ratio) is shown.

  For this reason, the retention time RT of the antioxidant contained in the lubricating oil is measured in advance, and a peak waveform of a predetermined period including the retention time RT of the antioxidant (in other words, a peak waveform unique to the antioxidant) By detecting the peak area, the concentration (content ratio) of the antioxidant can be calculated based on the peak area.

  The detection unit 45 stores in advance a map or a calculation formula indicating the correlation between the concentration of the antioxidant and the peak area, and using the map or the calculation formula, the detection unit 45 detects the antioxidant corresponding to the detected peak area. It is comprised so that a density | concentration (content rate) may be calculated.

  Here, FIG. 6 shows the correlation between the concentration of the antioxidant and the peak area which were actually measured using the lubricating oil containing the antioxidant and based on the measurement result. Based on the correlation, a map or a calculation formula is prepared in advance and stored in a storage unit (memory or the like) of the detection unit 45, whereby the detection unit 45 can calculate the concentration of the antioxidant.

The measurement unit 12 notifies the measurement result of the concentration (content ratio) of the antioxidant to the reduction unit 13 (specifically, the reduction control unit 15).
[1-6. Reduction control unit]
Next, the reduction control unit 15 of the reduction unit 13 will be described.

  As described above, the reduction control unit 15 uses the antioxidant content rate (concentration) detected by the measurement unit 12 and the target value of the hydrogen generation amount in the hydrogen supply unit 16 and the reduction process by the temperature control unit 20. Calculate the target temperature value.

  Here, among the various control processes executed by the reduction control unit 15, a condition setting process for setting the hydrogen supply condition based on the content (concentration) of the antioxidant will be described. The condition setting process is executed once every 24 hours. The hydrogen supply conditions include the amount of hydrogen generated in the hydrogen supply unit 16, the reduction processing temperature by the temperature control unit 20, the intake amount of lubricating oil taken into the reduction tank 11 from the oil tank 9 (hereinafter also referred to as oil intake amount). Is included. Note that the amount of oil taken from the oil tank 9 into the reduction tank 11 is controlled by an oil pump (not shown) that controls the transport amount of the lubricating oil in the second pipe 7b.

  As shown in FIG. 7, when the condition setting process is executed, first, in S110 (S represents a step), it is determined whether or not the operation is the first operation after the replacement of the lubricating oil. If a negative determination is made, the process proceeds to S130.

  The reduction control unit 15 has an initial operation flag as one of determination flags used for various control processes. For example, the initial operation flag is initialized and set to a set state by an input operation by a user of the oil state control device 5, and is set to a reset state when the power generation system 1 is started and lubricating oil is circulated. In S110, a positive determination is made when the initial operation flag is in the set state, and a negative determination is made in the reset state.

  If an affirmative determination is made in S110, the hydrogen supply condition is set to the basic condition in S120. The basic conditions are conditions that are arbitrarily set by the designer of the oil state control device 5, and hydrogen supply conditions (hydrogen generation amount, reduction processing temperature, oil intake amount) that are optimal for a standard environment are set. . That is, in S120, the optimal hydrogen production amount for the standard environment, the reduction treatment temperature optimal for the standard environment, and the oil intake amount optimal for the standard environment are set.

  If a negative determination is made in S110, in S130, the content (concentration) of the antioxidant detected by the measurement unit 12 is acquired from a storage unit (memory or the like), and the deterioration rate of the antioxidant is calculated. The deterioration rate of the antioxidant is a state quantity corresponding to a reduction amount of the content (concentration) of the antioxidant per unit time. For example, the amount of change (difference value) from the numerical value at the previous acquisition to the numerical value at the current acquisition in the content (concentration) of the antioxidant is calculated as the deterioration rate of the antioxidant.

  In the next S140, it is determined whether or not the deterioration rate of the antioxidant calculated in S130 is faster than a predetermined basic deterioration rate, and an affirmative determination is made that the calculated deterioration rate is faster than the basic deterioration rate. The process proceeds to S160, and a negative determination is made that the calculated deterioration rate is equal to or lower than the basic deterioration rate, and the process proceeds to S160. The basic deterioration rate is a reference value that is arbitrarily set by the designer of the oil condition control device 5, and is set based on the rate of decrease in the content (concentration) of the antioxidant in a standard environment.

  When an affirmative determination is made in S140 and the process proceeds to S150, the hydrogen supply conditions are changed so that the deterioration rate of the antioxidant is slowed down. As a method for changing the hydrogen supply condition in this case, for example, there is a method of changing each condition so as to increase the oil intake amount so as to increase the reduction treatment temperature so as to increase the hydrogen generation amount. It is done.

  If a negative determination is made in S140 and the process proceeds to S160, the hydrogen supply conditions are changed so that the deterioration rate of the antioxidant is increased. As a method for changing the hydrogen supply condition in this case, for example, there is a method of changing each condition so as to reduce the oil intake amount so as to reduce the reduction treatment temperature so as to reduce the hydrogen generation amount. It is done.

When S150 or S160 ends, the condition setting process ends.
The reduction control unit 15 executes such a condition setting process, so that the hydrogen generation amount and temperature control in the hydrogen supply unit 16 are controlled based on the content (concentration) of the antioxidant detected by the measurement unit 12. Each target value of the reduction processing temperature by the unit 20 and the oil intake amount by the oil pump is set. The reduction control unit 15 notifies the hydrogen supply unit 16 of the target value of the hydrogen generation amount, notifies the target value of the reduction processing temperature to the temperature control unit 20, and notifies the oil pump of the target value of the oil intake amount.

[1-7. effect]
As described above, the oil state control device 5 in the power generation system 1 of the present embodiment supplies hydrogen to the lubricating oil, and the measurement unit 12 that measures the content (concentration) of the antioxidant in the lubricating oil. A reduction unit 13.

  The reducing unit 13 controls the amount of hydrogen supplied to the lubricating oil based on the measurement result of the antioxidant content (concentration) by the measuring unit 12. The reduction control unit 15 of the reduction unit 13 calculates the target value of the hydrogen generation amount based on the concentration of the antioxidant detected by the measurement unit 12 by executing the above-described condition setting process. The target value is notified to the hydrogen supply unit 16. The supply amount control unit 19 of the hydrogen supply unit 16 controls the pressure of the gas supplied to the hydrogen supply module 17 based on the target value of the hydrogen generation amount calculated by the reduction control unit 15, thereby reducing the hydrogen generation amount. Move closer to the target value.

  Therefore, according to the oil state control device 5, it is possible to appropriately supply hydrogen used for regeneration (reduction) of the antioxidant, and in controlling the state of the lubricating oil containing the antioxidant, the antioxidant Can be reduced (regenerated) appropriately.

  Further, in the oil state control device 5, the reduction unit 13 changes the state of change in the antioxidant content (specifically, the amount of decrease in the content (concentration) of the antioxidant per unit time (of the antioxidant) Based on the deterioration rate)), the amount of hydrogen supplied to the lubricating oil is controlled. Thus, by using the deterioration rate of the antioxidant, not the instantaneous value of the antioxidant content, the change tendency of the antioxidant content can be predicted, and the antioxidant content becomes an abnormal value. Before reaching this, the hydrogen supply can be controlled to an appropriate value.

  If the deterioration rate of the antioxidant is faster than the basic deterioration rate (Yes in S140), the hydrogen supply conditions are changed so that the deterioration rate of the antioxidant is slowed down (S150). That is, it is determined that the hydrogen supply amount per unit time is insufficient, and for example, by increasing the hydrogen supply amount, the reduction rate of the antioxidant by hydrogen can be increased, and the antioxidant content (concentration) ) Change rate (decrease rate) can be reduced.

  When the deterioration rate of the antioxidant is the same as or slower than the basic deterioration rate (No in S140), the hydrogen supply conditions are changed so that the deterioration rate of the antioxidant is increased (S160). In other words, it is determined that the hydrogen supply amount per unit time is excessive, and, for example, by reducing the hydrogen supply amount, wasteful consumption of hydrogen is maintained while maintaining the reduction rate of the antioxidant by hydrogen at an appropriate rate. Can be suppressed.

  Next, the reduction unit 13 is configured to control the amount of hydrogen supplied per unit time to the lubricating oil based on the measurement result of the antioxidant content by the measurement unit 12. In the case of such a configuration, the hydrogen supply amount can be controlled more finely as compared with a mode in which a predetermined amount of hydrogen is supplied each time a predetermined condition is satisfied (for example, every time the antioxidant content falls below the determination value). . According to the oil state control device 5 including such a reduction unit 13, the hydrogen supply amount can be controlled to a finer and appropriate value, and the antioxidant can be appropriately reduced (regenerated). it can.

  Next, the reduction unit 13 includes a hydrogen supply module 17 configured to supply hydrogen using a hydrogen separation metal layer 27 as a hydrogen separation membrane. Hydrogen can be continuously supplied by using the hydrogen supply module 17 having a hydrogen separation membrane as a supply form of hydrogen to the lubricating oil.

[1-8. Correspondence of wording]
Here, the correspondence between words will be described.
The oil state control device 5 corresponds to an example of an oil state monitoring device, the measurement unit 12 corresponds to an example of a content rate measurement unit, the reduction unit 13 corresponds to an example of a reduction unit, and the hydrogen supply unit 16 serves as a hydrogen supply unit. The hydrogen separation metal layer 27 corresponds to an example of a hydrogen separation membrane.

[2. Example]
Next, examples performed to confirm the effects of the present disclosure will be described.
A general mineral oil (that is, paraffinic mineral oil) used for turbine oil or the like was used as a lubricating oil. Specifically, “RIX turbine 46” was used as the lubricating oil.

The lubricating oil before the test contains 0.10 wt% of dibutylhydroxytoluene as an antioxidant.
In this embodiment, an oxidation tank that promotes oxidation of the lubricating oil in the container by sending air to the container in which the catalyst is placed and heat is applied, and a reduction tank that reduces the oxidized lubricating oil are provided between the tanks. The test was carried out by circulating the water with a pump.

  More specifically, a test apparatus as shown in FIG. 8 was used. A round bottom flask was used for the oxidation tank 51, and this round bottom flask was set on a heater 53 with a magnetic stirrer. The temperature in the oxidation tank 51 (that is, the temperature of the lubricating oil (J)) is set to 100 ° C. by the heater 53, and a stirrer (not shown) is used so that the condition of the lubricating oil in the oxidation tank 51 is uniform. ).

  Further, a copper coil 57 in which a copper wire having a diameter of 1 mm and a length of 3 m is formed in a coil shape as a catalyst for promoting oxidation of the lubricating oil is disposed in the oxidation tank 51. Then, air was introduced into the lubricating oil at 1 L / min through the air introduction pipe 55 to oxidize the lubricating oil. The lubricating oil oxidized in the oxidation tank 51 is drawn out by the pump 59 and sent to the reduction tank 61.

  Similarly to the oxidation tank 51, the reduction tank 61 was set in a heater 63 with a magnetic stirrer using a round bottom flask. The heater 63 is set so that the temperature in the reducing tank 61 (that is, the temperature of the lubricating oil) is 40 ° C., and a stirrer (not shown) is used so that the condition of the lubricating oil in the reducing tank 61 is uniform. And stirred.

  Further, the hydrogen supply module 17 (similar to the above embodiment) in which a PdAg film is coated on a bottomed tube-shaped porous ceramic tube is inserted into the reduction tank 61. Then, hydrogen gas was supplied from the opening 31 of the hydrogen supply module 17 at a pressure of 0 kPaG, and hydrogen was supplied to the lubricating oil through the PdAg film on the surface of the hydrogen supply module 17. “Supplying hydrogen gas at a pressure of 0 kPaG” means supplying hydrogen gas at atmospheric pressure. That is, the numerical value in “0 kPaG pressure” means a difference from the atmospheric pressure.

  Thereby, the antioxidant (dibutylhydroxytoluene) in the lubricating oil was reduced, and the lubricating oil was regenerated. The lubricating oil regenerated in the reduction tank 61 is sent again to the oxidation tank 51 by the pump 65. Here, regeneration of the lubricating oil means regeneration by reduction of the antioxidant in the lubricating oil.

  And with this test apparatus, the reproduction | regeneration test of the lubricating oil was done over 100 hours on the conditions mentioned above. When the lubricating oil after the test was examined, the concentration of the antioxidant, that is, the content of dibutylhydroxytoluene was 0.05 wt%. That is, since the concentration (content ratio) of the antioxidant is decreased after the test with respect to the initial value of 0.10 wt%, it can be determined that the lubricating oil has deteriorated.

The antioxidant concentration is measured by GC-MS (gas chromatograph mass spectrometer).
Thereafter, among the above test conditions, the temperature in the reduction tank 61 (ie, the temperature of the lubricating oil) is changed to 100 ° C., and the supply pressure of hydrogen gas (hydrogen supply pressure) from the opening 31 of the hydrogen supply module 17 is changed. By changing to 20 kPaG, the hydrogen supply amount from the hydrogen supply module 17 to the lubricating oil was increased. That is, with respect to the lubricating oil having an antioxidant concentration of 0.05 wt% at the initial value, the hydrogen supply amount was increased, and the regeneration test of the lubricating oil was continued for another 100 hours.

  When the lubricating oil after 200 hours from the start of the test was examined, the antioxidant concentration, that is, the content of dibutylhydroxytoluene was 0.05 wt%, which was the same as the initial value of 0.05 wt%. In other words, it can be seen that by increasing the hydrogen supply amount, the concentration (content ratio) of the antioxidant does not decrease from the time point of 100 hours to the time point of 200 hours, and deterioration of the lubricating oil can be suppressed.

  The test results are shown in FIG. According to this test result, it can be understood that a decrease in the concentration (content rate) of the antioxidant can be suppressed (in other words, deterioration of the lubricating oil can be suppressed) by changing the hydrogen supply amount to the lubricating oil.

[3. Other Embodiments]
As mentioned above, although embodiment of this indication was described, this indication is not limited to the above-mentioned embodiment, and can be carried out in various modes in the range which does not deviate from the gist of this indication.

  For example, in the above embodiment, the lubricating oil (engine oil, turbine oil) used in the turbine generator is the target of state control, but the target oil in the present disclosure is not limited to the lubricating oil, Hydraulic hydraulic fluid: hydraulic hydraulic fluid) may be targeted.

  Further, as in the above embodiment, the oil state control device controls the hydrogen supply amount per unit time based on the deterioration rate of the antioxidant (the rate of decrease in the content (concentration) of the antioxidant). It is not limited to. For example, the oil state control device may be configured to supply a predetermined amount of hydrogen to the oil when the instantaneous value of the content rate (concentration) of the antioxidant falls below a predetermined determination value. Good. According to such an oil state control device, hydrogen can be supplied to the oil each time the content (concentration) of the antioxidant in the oil falls below the determination value.

  Alternatively, the oil state control device may control the amount of hydrogen supplied per unit time to the oil based on the instantaneous value of the antioxidant content, not the state of change in the antioxidant content. Good. When supplying hydrogen to oil, a method of controlling the hydrogen supply amount per unit time is used, so that a certain amount of hydrogen is supplied each time a predetermined condition is satisfied (for example, every time the antioxidant content falls below a judgment value). Compared with the method of supplying hydrogen, the hydrogen supply amount can be controlled more finely.

  In the above embodiment, the form using the hydrogen separation membrane has been described as the form of supplying hydrogen to the oil. However, as another form of supply, the form of supplying hydrogen gas as it is, the form of hydrogen generated using a catalyst is supplied. The form, the form which supplies the hydrogen gas generated by electrolysis, etc. are mentioned.

  The content rate measuring unit (measuring unit 12) is not limited to the form fixed to the oil tank, but may be any form fixed to a place where oil can be extracted. For example, the content rate measuring unit may be fixed to the circulation path and extract (collect) oil samples from the circulation path.

  The analysis using the gas chromatograph in the oil state control device is not limited to the analysis using only the gas chromatograph, but a gas chromatograph mass spectrometer (GC-MS) combining a gas chromatograph and a mass spectrometer was used. It may be an analysis.

  Moreover, the measuring method of the content rate of antioxidant is not restricted to the measuring method using a gas chromatograph, For example, the measuring method using an infrared spectrophotometer (FT-IR), the measurement using an oxidation stability test A method, a measurement method using RULER View, or the like may be employed.

  Furthermore, the gas supplied to the hydrogen supply module is not limited to hydrogen gas. For example, various hydrogen-containing gases containing hydrogen (for example, a mixed gas such as natural gas or a reformed gas thereof) may be used. .

  The hydrogen supply module only needs to be arranged so that hydrogen can be supplied to the lubricating oil via a hydrogen separation membrane (hydrogen separation metal layer), and therefore, the hydrogen supply module may be arranged not only in the reduction tank but also in an oil tank or the like.

  As the hydrogen supply module, various hydrogen supply modules that can supply hydrogen to lubricating oil or hydraulic oil through a hydrogen separation membrane can be employed. For example, as a porous support body, the structure which is not equipped with the porous layer on the surface of a porous base part is employable. Further, the hydrogen separation membrane may be provided inside the porous support instead of the surface of the porous support. Further, the hydrogen separation metal is not limited to palladium or palladium alloy. Moreover, the catalyst metal layer does not need to be provided on the surface of the hydrogen separation membrane.

  The adjustment of the oil temperature is not limited to the form performed by automatic control. For example, the oil temperature may be checked and the heat generation state of the heater may be adjusted manually (manual operation).

  The functions of one constituent element in the embodiment may be distributed as a plurality of constituent elements, or the functions of a plurality of constituent elements may be integrated into one constituent element. Moreover, you may abbreviate | omit a part of structure of the said embodiment. In addition, at least a part of the configuration of the above embodiment may be added to or replaced with the configuration of the other embodiment. In addition, all the aspects included in the technical idea specified from the wording described in the claims are embodiments of the present disclosure.

  DESCRIPTION OF SYMBOLS 1 ... Power generation system, 3 ... Turbine generator, 5 ... Oil state control apparatus, 7 ... Circulation path, 7a ... 1st piping, 7b ... 2nd piping, 7c ... 3rd piping, 7d ... 4th piping, 9 ... Oil Tank, 11 ... Reduction tank, 12 ... Measuring unit, 13 ... Reduction unit, 14 ... Cooling device, 15 ... Reduction control unit, 16 ... Hydrogen supply unit, 17 ... Hydrogen supply module, 19 ... Supply amount control unit, 20 ... Temperature Control part, 21 ... Temperature sensor, 22 ... Heater, 23 ... Heat generation control part, 25 ... Porous support, 27 ... Hydrogen separation metal layer, 41 ... Carrier gas supply part, 42 ... Sample extraction pipe, 43 ... Sample injection part 44 ... column, 45 ... detector, 48 ... metal joint, 49 ... introduction pipe, 51 ... oxidation tank, 61 ... reduction tank.

Claims (6)

An oil state control device for controlling the state of an oil containing an antioxidant and used as a lubricating oil or a hydraulic oil,
A content rate measuring unit for measuring the content rate of the antioxidant in the oil;
A reducing portion for reducing the oxide of the antioxidant;
With
The reducing unit includes a hydrogen supply unit that supplies hydrogen to the oil;
The hydrogen supply unit controls a hydrogen supply amount to the oil based on a measurement result of the content rate of the antioxidant by the content rate measurement unit.
Oil condition control device. The hydrogen supply unit controls a hydrogen supply amount to the oil based on a change state of a content rate of the antioxidant.
The oil state control device according to claim 1. The hydrogen supply unit controls a hydrogen supply amount per unit time for the oil based on a measurement result of the content rate of the antioxidant by the content rate measurement unit.
The oil state control device according to claim 1 or 2. The hydrogen supply unit includes a hydrogen separation membrane, and is configured to supply hydrogen to the oil through the hydrogen separation membrane.
The oil state control device according to any one of claims 1 to 3. The antioxidant includes at least one of an amine-based antioxidant and a phenol-based antioxidant,
The oil state control device according to any one of claims 1 to 4. The oil is a lubricating oil or hydraulic oil used in a power plant turbine.
The oil state control device according to any one of claims 1 to 5.

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