JP2024013483A - Turbine oil regeneration method - Google Patents
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- 239000010723 turbine oil Substances 0.000 title claims abstract description 123
- 238000011069 regeneration method Methods 0.000 title description 13
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 62
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 59
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims abstract description 58
- 239000003112 inhibitor Substances 0.000 claims abstract description 50
- 238000000034 method Methods 0.000 claims abstract description 15
- 230000001172 regenerating effect Effects 0.000 claims abstract description 14
- 238000005259 measurement Methods 0.000 claims description 9
- 230000002265 prevention Effects 0.000 abstract description 9
- 230000003647 oxidation Effects 0.000 abstract description 7
- 238000007254 oxidation reaction Methods 0.000 abstract description 7
- 230000002542 deteriorative effect Effects 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 abstract 1
- 238000011084 recovery Methods 0.000 description 10
- 239000000654 additive Substances 0.000 description 8
- 239000003463 adsorbent Substances 0.000 description 6
- 239000002518 antifoaming agent Substances 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 238000005033 Fourier transform infrared spectroscopy Methods 0.000 description 4
- 238000002835 absorbance Methods 0.000 description 4
- 230000007423 decrease Effects 0.000 description 4
- 230000006866 deterioration Effects 0.000 description 4
- 230000003064 anti-oxidating effect Effects 0.000 description 3
- -1 carboxylic acids Chemical class 0.000 description 3
- 239000012153 distilled water Substances 0.000 description 3
- 239000010687 lubricating oil Substances 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000004322 Butylated hydroxytoluene Substances 0.000 description 2
- NLZUEZXRPGMBCV-UHFFFAOYSA-N Butylhydroxytoluene Chemical compound CC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 NLZUEZXRPGMBCV-UHFFFAOYSA-N 0.000 description 2
- 229910019142 PO4 Inorganic materials 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 229940095259 butylated hydroxytoluene Drugs 0.000 description 2
- 235000010354 butylated hydroxytoluene Nutrition 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 235000021317 phosphate Nutrition 0.000 description 2
- 230000008929 regeneration Effects 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 238000013112 stability test Methods 0.000 description 2
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 238000011088 calibration curve Methods 0.000 description 1
- 150000001735 carboxylic acids Chemical class 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- WDNQRCVBPNOTNV-UHFFFAOYSA-N dinonylnaphthylsulfonic acid Chemical class C1=CC=C2C(S(O)(=O)=O)=C(CCCCCCCCC)C(CCCCCCCCC)=CC2=C1 WDNQRCVBPNOTNV-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 235000005985 organic acids Nutrition 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 239000002530 phenolic antioxidant Substances 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- AQSJGOWTSHOLKH-UHFFFAOYSA-N phosphite(3-) Chemical class [O-]P([O-])[O-] AQSJGOWTSHOLKH-UHFFFAOYSA-N 0.000 description 1
- 150000003013 phosphoric acid derivatives Chemical class 0.000 description 1
- 229920000058 polyacrylate Polymers 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 150000005846 sugar alcohols Polymers 0.000 description 1
- 150000003871 sulfonates Chemical class 0.000 description 1
- 238000012065 two one-sided test Methods 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D15/00—Separating processes involving the treatment of liquids with solid sorbents; Apparatus therefor
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M175/00—Working-up used lubricants to recover useful products ; Cleaning
- C10M175/02—Working-up used lubricants to recover useful products ; Cleaning mineral-oil based
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/18—Lubricating arrangements
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
Abstract
【課題】さび止め性能と酸化防止性能とが両立可能なタービン油の再生方法を提供する。【解決手段】使用済みのタービン油の再生方法は、使用済みのタービン油から劣化成分を除去する除去ステップと、除去ステップで得られた再生タービン油にさび止め剤及び酸化防止剤を添加する添加ステップとを含み、さび止め剤の添加量は、再生タービン油の質量に対して０．０１～０．０４％の質量であり、酸化防止剤の添加量は、酸化防止剤の種類に応じて予め決められた範囲の濃度となる質量である。【選択図】図１An object of the present invention is to provide a method for regenerating turbine oil that can achieve both rust prevention performance and oxidation prevention performance. [Solution] A method for regenerating used turbine oil includes a removal step of removing deteriorating components from the used turbine oil, and addition of a rust inhibitor and an antioxidant to the regenerated turbine oil obtained in the removal step. The amount of the rust inhibitor added is 0.01 to 0.04% by mass based on the mass of the recycled turbine oil, and the amount of the antioxidant added is determined depending on the type of antioxidant. This is the mass that results in a concentration within a predetermined range. [Selection diagram] Figure 1
Description
本開示は、蒸気タービンやガスタービンにおいて潤滑油として使用されるタービン油の再生方法に関する。 The present disclosure relates to a method for regenerating turbine oil used as a lubricating oil in a steam turbine or a gas turbine.
特許文献１には、さび止め剤等の添加剤を含むタービン油が記載されている。このタービン油中のさび止め剤の濃度は０．０１～１０．０質量％である。
特許文献１のタービン油は新油としてのタービン油の組成であり、使用済みのタービン油を再生して再利用する場合には、使用済みのタービン油の再生において、使用済みのタービン油から劣化成分を除去した後に添加剤を添加する必要がある。添加剤としては、さび止め剤、酸化防止剤、消泡剤等が挙げられるが、さび止め剤は酸化防止剤による酸化防止性能を低下させることが知られている。このため、使用済みのタービン油を再生するに当たり、さび止め剤と酸化防止剤とを添加する場合に、さび止め性能と酸化防止性能とを両立させることが要求される。
The turbine oil of
上述の事情に鑑みて、本開示の少なくとも１つの実施形態は、さび止め性能と酸化防止性能とが両立可能なタービン油の再生方法を提供することを目的とする。 In view of the above circumstances, at least one embodiment of the present disclosure aims to provide a method for regenerating turbine oil that can achieve both rust prevention performance and oxidation prevention performance.
上記目的を達成するため、本開示に係るタービン油の再生方法は、使用済みのタービン油の再生方法であって、使用済みの前記タービン油から劣化成分を除去する除去ステップと、前記除去ステップで得られた再生タービン油にさび止め剤及び酸化防止剤を添加する添加ステップとを含み、前記さび止め剤の添加量は、前記再生タービン油の質量に対して０．０１～０．０４％の質量であり、前記酸化防止剤の添加量は、該酸化防止剤の種類に応じて予め決められた範囲の濃度となる質量である。 In order to achieve the above object, a method for regenerating turbine oil according to the present disclosure is a method for regenerating used turbine oil, comprising: a removing step of removing degraded components from the used turbine oil; an addition step of adding a rust inhibitor and an antioxidant to the obtained regenerated turbine oil, the amount of the rust inhibitor added is 0.01 to 0.04% based on the mass of the regenerated turbine oil. The amount of the antioxidant added is the mass that provides a concentration within a predetermined range depending on the type of the antioxidant.
本開示のタービン油の再生方法によれば、使用済みのタービン油から劣化成分を除去した再生タービン油にさび止め剤及び酸化防止剤を添加し、さび止め剤の添加量が再生タービン油の質量に対して０．０１～０．０４％の質量であることにより、さび止め性能と酸化防止性能とが両立可能なタービン油を再生することができる。 According to the turbine oil regeneration method of the present disclosure, a rust inhibitor and an antioxidant are added to the regenerated turbine oil from which deterioration components have been removed from used turbine oil, and the amount of the rust inhibitor added is determined by the mass of the regenerated turbine oil. By having a mass of 0.01 to 0.04% relative to the amount of carbon dioxide, it is possible to regenerate turbine oil that has both anti-rust performance and anti-oxidation performance.
以下、本開示の実施形態によるタービン油の再生方法について、図面に基づいて説明する。以下で説明する実施形態は、本開示の一態様を示すものであり、この開示を限定するものではなく、本開示の技術的思想の範囲内で任意に変更可能である。 Hereinafter, a method for regenerating turbine oil according to an embodiment of the present disclosure will be described based on the drawings. The embodiment described below shows one aspect of the present disclosure, does not limit this disclosure, and can be arbitrarily modified within the scope of the technical idea of the present disclosure.
＜本開示のタービン油の再生方法＞
本開示のタービン油の再生方法によって再生されるタービン油は、蒸気タービンやガスタービンおいて潤滑油として使用された使用済みのタービン油である。使用済みのタービン油は劣化により、カルボン酸等の有機酸のような劣化成分を含むようになり、色が茶褐色に変色する。使用済みのタービン油は、劣化成分が除去されることによって再生され、再生されたタービン油は透明になる。この再生方法は、蒸気タービンやガスタービンの定検時にバッチ式で実施することもできるし、蒸気タービンやガスタービンの運転中に連続的に使用済みのタービン油を抜き出して連続的に再生することもできる。
<Turbine oil regeneration method of the present disclosure>
The turbine oil regenerated by the turbine oil regeneration method of the present disclosure is used turbine oil that has been used as lubricating oil in a steam turbine or a gas turbine. Due to deterioration, used turbine oil comes to contain deteriorating components such as organic acids such as carboxylic acids, and its color changes to brownish-brown. Used turbine oil is regenerated by removing degraded components, and the regenerated turbine oil becomes transparent. This regeneration method can be carried out batchwise during periodic inspections of steam turbines or gas turbines, or it can be carried out continuously by extracting used turbine oil while the steam turbine or gas turbine is operating. You can also do it.
図１に示されるように、本開示のタービン油の再生方法ではまず、使用済みのタービン油から劣化成分を除去する（除去ステップＳ１）。除去ステップＳ１では、例えば、攪拌槽に使用済みのタービン油とシリカゲル等の吸着剤とを投入して攪拌したり、吸着剤を充填したカラムに使用済みのタービン油を通過させたりすることによって、使用済みのタービン油と吸着剤とを接触させる。この接触により、使用済みのタービン油に含まれる劣化成分が吸着剤に吸着されて、使用済みのタービン油から劣化成分が除去される。これにより、使用済みのタービン油は再生タービン油となる。 As shown in FIG. 1, in the turbine oil regeneration method of the present disclosure, first, degraded components are removed from used turbine oil (removal step S1). In the removal step S1, for example, used turbine oil and an adsorbent such as silica gel are put into a stirring tank and stirred, or the used turbine oil is passed through a column filled with an adsorbent. Contacting used turbine oil and adsorbent. Through this contact, the degraded components contained in the used turbine oil are adsorbed by the adsorbent, and the degraded components are removed from the used turbine oil. As a result, used turbine oil becomes recycled turbine oil.
使用済みのタービン油には劣化成分の他に各種添加剤も含まれているので、使用済みのタービン油と吸着剤とが接触すると、劣化成分だけではなく添加剤も吸着剤に吸着される。これにより、再生タービン油中の添加剤の含有量が、蒸気タービンやガスタービンおいて使用されていたタービン油よりも低下してしまう。そこで、除去ステップＳ１の後、再生タービン油にさび止め剤及び酸化防止剤を添加する（添加ステップＳ２）。添加ステップＳ２では、さび止め剤及び酸化防止剤に加えて消泡剤を再生タービン油に添加することもできる。添加ステップＳ２は、除去ステップＳ１において使用済みのタービン油中の添加剤も除去されてしまうことに対して、除去された分の添加剤を追添加することを目的とするものである。 Used turbine oil contains various additives in addition to deteriorating components, so when used turbine oil and adsorbent come into contact, not only the deteriorating components but also the additives are adsorbed by the adsorbent. This results in a lower content of additives in the regenerated turbine oil than in the turbine oil used in steam turbines and gas turbines. Therefore, after the removal step S1, a rust inhibitor and an antioxidant are added to the regenerated turbine oil (addition step S2). In the addition step S2, an antifoaming agent can also be added to the regenerated turbine oil in addition to the rust inhibitor and antioxidant. The purpose of the addition step S2 is to add the removed amount of the additive, since the additive in the used turbine oil is also removed in the removal step S1.
さび止め剤としては、例えば、金属スルフォネート、アルキルベンゼンスルフォネート、ジノニルナフタレンスルフォネート、有機亜リン酸エステル、有機リン酸エステル、有機スルホン酸金属塩、有機リン酸金属塩、アルケニルコハク酸エステル、アルケニルコハク酸多価アルコールエステル等を使用できる。酸化防止剤としては、例えば、フェノール系の酸化防止剤、アミン系の酸化防止剤、又はこれらの混合物を使用できる。消泡剤としては、例えば、シリコーン系消泡剤、フッ素系消泡剤、ポリアクリルレート系消泡剤等を使用できる。 Examples of rust inhibitors include metal sulfonates, alkylbenzene sulfonates, dinonylnaphthalene sulfonates, organic phosphites, organic phosphates, organic sulfonic acid metal salts, organic phosphate metal salts, and alkenyl succinates. , alkenylsuccinic acid polyhydric alcohol ester, etc. can be used. As the antioxidant, for example, a phenolic antioxidant, an amine antioxidant, or a mixture thereof can be used. As the antifoaming agent, for example, silicone antifoaming agents, fluorine antifoaming agents, polyacrylate antifoaming agents, etc. can be used.
本開示の発明者らは、添加ステップＳ２において再生タービン油に追添加するさび止め剤の適切な量について検討を行った。本開示の発明者らは、蒸留水５００ｍＬと、５００ｍＬの蒸留水にさび止め剤であるサンヒビター１５０（三洋化成工業株式会社）の濃度を０．０１質量％、０．０２質量％、０．０３質量％、０．０４質量％、０．０６質量％とした溶液との６種類のサンプルを調製し、これらのサンプルに対して、ＪＩＳ Ｋ ２５１０に従ったさび止め試験を行った。その結果、蒸留水については十分なさび止め性能が認められなかったが、０．０１～０．０６質量％のさび止め剤の蒸留水溶液については十分なさび止め性能が認められた。 The inventors of the present disclosure have studied the appropriate amount of the rust inhibitor to be added to the recycled turbine oil in the addition step S2. The inventors of the present disclosure have added 500 mL of distilled water and 500 mL of distilled water with concentrations of 0.01% by mass, 0.02% by mass, and 0.03% by mass of Sanhibitor 150 (Sanyo Chemical Industries, Ltd.), which is a rust inhibitor. Six types of samples were prepared with solutions of 0.04% by mass and 0.06% by mass, and a rust prevention test according to JIS K 2510 was conducted on these samples. As a result, although sufficient rust-preventing performance was not observed with distilled water, sufficient rust-preventing performance was observed with a distilled aqueous solution of a 0.01 to 0.06 mass % rust inhibitor.
タービン油の酸化安定性を示す指標としてＲＰＶＯＴ値（ＡＳＴＭ Ｄ ２２７２）が一般的に使用される。ＲＰＶＯＴ値に基づいてタービン油の交換・再生時期を決めることができる。本開示の発明者らは、除去ステップＳ１によって得られた再生タービン油にさび止め剤を添加してさび止め剤の濃度を０．０３質量％、０．０４質量％、０．０５質量％とした３つのサンプルと、さび止め剤を添加しない再生タービン油とのそれぞれに酸化防止剤であるブチルヒドロキシトルエン（東京化成工業株式会社）を０．７２質量％の濃度となるように添加した４つのサンプルについてＲＰＶＯＴ値を測定した。また、除去ステップＳ１によって得られた再生タービン油にさび止め剤を添加してさび止め剤の濃度を０．０３質量％、０．０６質量％とした２つのサンプルのそれぞれに酸化防止剤を０．７６質量％の濃度となるように添加したサンプルについてＲＰＶＯＴ値を測定した。図２に、これらのサンプルの試験結果を、横軸を再生タービン油中のさび止め剤の濃度とするとともに縦軸を使用済みのタービン油のＲＰＶＯＴ値に対する各サンプルのＲＰＶＯＴ値の比であるＲＰＶＯＴ値の回復率（％）としたグラフとして示す。図２において、丸プロットは酸化防止剤の濃度が０．７２質量％のサンプルの試験結果を示しており、四角プロットは酸化防止剤の濃度が０．７６質量％のサンプルの試験結果を示している。この結果によれば、酸化防止剤の濃度が異なっていても、再生タービン油中のさび止め剤の濃度が大きくなるほどＲＰＶＯＴ値の回復率は小さくなることがわかった。 The RPVOT value (ASTM D 2272) is commonly used as an indicator of the oxidation stability of turbine oil. The timing for replacing and regenerating the turbine oil can be determined based on the RPVOT value. The inventors of the present disclosure added a rust inhibitor to the recycled turbine oil obtained in the removal step S1 to adjust the rust inhibitor concentration to 0.03% by mass, 0.04% by mass, and 0.05% by mass. Four samples were prepared in which butylated hydroxytoluene (Tokyo Kasei Kogyo Co., Ltd.), an antioxidant, was added to a concentration of 0.72% by mass to each of the three samples prepared in the same manner as above, and the recycled turbine oil to which no rust inhibitor was added. RPVOT values were measured on the samples. Furthermore, two samples were prepared in which a rust inhibitor was added to the recycled turbine oil obtained in the removal step S1 so that the concentration of the rust inhibitor was 0.03% by mass and 0.06% by mass. The RPVOT value was measured for the sample added to give a concentration of .76% by mass. Figure 2 shows the test results for these samples, with the horizontal axis representing the concentration of rust inhibitor in recycled turbine oil and the vertical axis representing the ratio of the RPVOT value of each sample to the RPVOT value of used turbine oil. It is shown as a graph showing the recovery rate (%) of the value. In Figure 2, the circle plots show the test results for a sample with an antioxidant concentration of 0.72% by mass, and the square plots show the test results for a sample with an antioxidant concentration of 0.76% by mass. There is. According to the results, it was found that even if the concentration of the antioxidant was different, the recovery rate of the RPVOT value decreased as the concentration of the rust inhibitor in the recycled turbine oil increased.
さらに、本開示の発明者らは、除去ステップＳ１によって得られた再生タービン油にさび止め剤を添加してさび止め剤の濃度を０．０３質量％、０．０６質量％とした２つのサンプルと、さび止め剤を添加しない再生タービン油の２つのサンプルとの４つのサンプルについて、本開示の出願人による特開２０１５－０５９８６６号公報に記載されたＤｒｙ－タービン油酸化安定度試験（Ｄｒｙ－ＴＯＳＴ）を行った。Ｄｒｙ－ＴＯＳＴとは、ＪＩＳ規格（ＪＩＳ Ｋ ２５１４）に規定されているタービン油酸化安定度試験（ＴＯＳＴ）の試験条件に対して、油浴槽の温度を１２０℃に変更したものである。図３に、これらのサンプルの試験結果を、横軸を再生タービン油中のさび止め剤の濃度とするとともに縦軸をＲＰＶＯＴ値の低下速度（ｍｉｎ／ｈｒ）としたグラフとして示す。この結果によれば、再生タービン油中のさび止め剤の濃度はＲＰＶＯＴ値の低下速度に対してほとんど影響がないことが分かった。 Furthermore, the inventors of the present disclosure added a rust inhibitor to the recycled turbine oil obtained by the removal step S1 to create two samples with a rust inhibitor concentration of 0.03% by mass and 0.06% by mass. Dry-turbine oil oxidation stability test (Dry- TOST) was performed. Dry-TOST is the test condition of the turbine oil oxidation stability test (TOST) specified in the JIS standard (JIS K 2514), in which the temperature of the oil bath is changed to 120°C. FIG. 3 shows the test results of these samples as a graph in which the horizontal axis represents the concentration of the rust inhibitor in the recycled turbine oil and the vertical axis represents the rate of decrease in RPVOT value (min/hr). According to the results, it was found that the concentration of the rust inhibitor in the regenerated turbine oil has almost no effect on the rate of decrease in the RPVOT value.
本開示の発明者らによる上記検討結果に基づき、再生タービン油に添加されるさび止め剤の添加量については、再生タービン油中のさび止め剤の濃度とＲＰＶＯＴ値の低下速度との関係は考慮する必要がなく、再生タービン油中のさび止め剤の濃度とＲＰＶＯＴ値の回復率との関係に基づいて決定すればよいと考えられる。そこで、本開示の発明者らは、ＲＰＶＯＴ値の回復率が９０％以上になるとともに十分なさび止め性能を得られる条件として、添加ステップＳ２において再生タービン油に添加されるさび止め剤の添加量を、再生タービン油の質量に対して０．０１～０．０４％の質量とした。 Based on the above study results by the inventors of the present disclosure, the amount of rust inhibitor added to the recycled turbine oil takes into account the relationship between the concentration of the rust inhibitor in the recycled turbine oil and the rate of decline in the RPVOT value. It is considered that there is no need to do this, and it may be determined based on the relationship between the rust inhibitor concentration in the regenerated turbine oil and the recovery rate of the RPVOT value. Therefore, the inventors of the present disclosure determined that the amount of rust inhibitor added to the recycled turbine oil in the addition step S2 is as a condition for achieving a recovery rate of RPVOT value of 90% or more and obtaining sufficient rust prevention performance. was set at a mass of 0.01 to 0.04% with respect to the mass of regenerated turbine oil.
尚、酸化防止剤の添加量については、酸化防止剤の種類に応じて予め決められた範囲の濃度となる質量である。除去ステップＳ１において使用済みのタービン油中の酸化防止剤が全て除去されてしまうと想定すれば、タービン油に最初に含まれていた量と同じ量の酸化防止剤を添加ステップＳ２において添加すればよい。また、除去ステップＳ１の後に、再生タービン油中の酸化防止剤の含有量を測定し、タービン油に最初に含まれていた量と測定値との差に相当する量の酸化防止剤を添加ステップＳ２において添加してもよい。タービン油中の酸化防止剤の濃度は例えば、フーリエ変換赤外分光法（ＦＴ－ＩＲ）によって測定可能である。具体的には、酸化防止剤の濃度が異なるタービン油の複数のサンプルを準備し、それらのサンプルの吸光度をＦＴ－ＩＲによって測定することで、酸化防止剤の濃度と吸光度との関係である検量線を予め作成しておく。使用済みのタービン油又は再生タービン油の吸光度をＦＴ－ＩＲによって測定し、この検量線に基づいて吸光度の測定値から酸化防止剤の濃度を測定することができる。 It should be noted that the amount of antioxidant added is a mass that provides a concentration within a predetermined range depending on the type of antioxidant. Assuming that all the antioxidant in the used turbine oil is removed in the removal step S1, if the same amount of antioxidant is added in the addition step S2 as the amount originally contained in the turbine oil, good. Further, after the removal step S1, the content of antioxidant in the regenerated turbine oil is measured, and an amount of antioxidant corresponding to the difference between the amount originally contained in the turbine oil and the measured value is added. It may be added in S2. The concentration of antioxidants in turbine oil can be measured, for example, by Fourier Transform Infrared Spectroscopy (FT-IR). Specifically, by preparing multiple samples of turbine oil with different antioxidant concentrations and measuring the absorbance of those samples using FT-IR, we can calculate the calibration, which is the relationship between the antioxidant concentration and absorbance. Create a line in advance. The absorbance of used turbine oil or recycled turbine oil is measured by FT-IR, and the concentration of the antioxidant can be determined from the measured absorbance based on this calibration curve.
このように、使用済みのタービン油から劣化成分を除去した再生タービン油にさび止め剤及び酸化防止剤を添加し、さび止め剤の添加量が再生タービン油の質量に対して０．０１～０．０４％の質量であることにより、さび止め性能と酸化防止性能とが両立可能なタービン油を再生することができる。 In this way, rust inhibitors and antioxidants are added to the recycled turbine oil from which deteriorating components have been removed from used turbine oil, and the amount of the rust inhibitor added is 0.01 to 0 relative to the mass of the recycled turbine oil. By having a mass of .04%, it is possible to regenerate turbine oil that has both anti-corrosion performance and anti-oxidation performance.
除去ステップＳ１及び添加ステップＳ２によって得られた再生タービン油でも、蒸気タービンやガスタービンおいて潤滑油として再使用可能であるが、使用済みのタービン油に対してＲＰＶＯＴ値を有意に低下させずにさび止め性能を得られるようにするために、添加ステップＳ２の後に、以下で説明する動作を付加してもよい。 The regenerated turbine oil obtained by the removal step S1 and addition step S2 can also be reused as a lubricating oil in steam turbines and gas turbines, but it can be used without significantly lowering the RPVOT value compared to used turbine oil. In order to obtain rust prevention performance, the operation described below may be added after the addition step S2.
図４に示されるように、添加ステップＳ２の後に、再生タービン油のＲＰＶＯＴ値を測定する（測定ステップＳ３）。上述したように、再生タービン中のさび止め剤の濃度が大きくなるほどＰＲＶＯＴ値の回復率が小さくなる。例えば、除去ステップＳ１において除去されてしまったさび止め剤の量に対して、添加ステップＳ２において添加されたさび止め剤の量が多すぎると、添加ステップＳ２の後の再生タービン油中のさび止め剤の濃度が０．０４質量％を超えてしまい、ＰＲＶＯＴ値の回復率が９０％を下回ることが考えられる。 As shown in FIG. 4, after the addition step S2, the RPVOT value of the regenerated turbine oil is measured (measurement step S3). As mentioned above, the higher the concentration of rust inhibitor in the regenerated turbine, the lower the rate of recovery of the PRVOT value. For example, if the amount of the rust inhibitor added in the addition step S2 is too large compared to the amount of the rust inhibitor removed in the removal step S1, the rust preventive agent in the recycled turbine oil after the addition step S2 may be It is conceivable that the concentration of the agent exceeds 0.04% by mass and the recovery rate of the PRVOT value falls below 90%.
一方で、本開示の発明者らによる検討（酸化防止剤としてブチルヒドロキシトルエンを使用）では、図５に示されるように、再生タービン油中の酸化防止剤の濃度とＲＰＶＯＴ値とは比例関係があることが認められた。このため、酸化防止剤の種類ごとに、この比例関係（例えば、ＲＰＶＯＴ値を酸化防止剤の濃度で除算して得られた比例定数）を求めておき、この比例関係に基づいて適切な量の酸化防止剤を再生タービン油に追添加すれば、ＰＲＶＯＴ値の回復率を上昇させることができる。 On the other hand, in a study conducted by the inventors of the present disclosure (using butylated hydroxytoluene as the antioxidant), as shown in FIG. 5, there is a proportional relationship between the concentration of antioxidant in recycled turbine oil and the RPVOT value. One thing was recognized. For this reason, this proportional relationship (for example, the proportionality constant obtained by dividing the RPVOT value by the antioxidant concentration) is determined for each type of antioxidant, and the appropriate amount is determined based on this proportional relationship. If an antioxidant is additionally added to the regenerated turbine oil, the recovery rate of the PRVOT value can be increased.
そこで、測定ステップＳ３の後、測定ステップＳ３で測定されたＲＰＶＯＴ値に基づいて、再生タービン油に酸化防止剤を追添加する必要があるか否かを判定する（判定ステップＳ４）。例えば、ＰＲＶＯＴ値の回復率についての下限値を予め設定しておき（例えば９０％）、測定ステップＳ３において測定したＲＰＶＯＴ値から算出されたＰＲＶＯＴ値の回復率とこの下限値とを比較し、前者が後者を下回る場合には、再生タービン油に酸化防止剤を追添加する必要があると判定する。 Therefore, after the measurement step S3, it is determined whether or not it is necessary to additionally add an antioxidant to the regenerated turbine oil based on the RPVOT value measured in the measurement step S3 (determination step S4). For example, a lower limit value for the recovery rate of the PRVOT value is set in advance (for example, 90%), and the recovery rate of the PRVOT value calculated from the RPVOT value measured in measurement step S3 is compared with this lower limit value, and the former If it is less than the latter, it is determined that it is necessary to additionally add an antioxidant to the regenerated turbine oil.
判定ステップＳ４において再生タービン油に酸化防止剤を追添加する必要があると判定された場合には、測定ステップＳ３で測定されたＲＰＶＯＴ値に基づいて、酸化防止剤の追添加量を決定する（決定ステップＳ５）。例えば、酸化防止剤の種類ごとに予め求めておいた酸化防止剤の濃度とＲＰＶＯＴ値との比例関係に基づいて、測定ステップＳ３で測定されたＲＰＶＯＴ値と下限値との差から、酸化防止剤の追添加量を算出することができる。酸化防止剤の追添加量を決定したら、その追添加量の酸化防止剤を再生タービン油に追添加する（追添加ステップＳ６）。 If it is determined in the determination step S4 that it is necessary to additionally add an antioxidant to the regenerated turbine oil, the amount of additional antioxidant is determined based on the RPVOT value measured in the measurement step S3 ( Determination step S5). For example, based on the proportional relationship between the concentration of antioxidant and RPVOT value determined in advance for each type of antioxidant, the difference between the RPVOT value measured in measurement step S3 and the lower limit value can be calculated based on the The amount of additional addition can be calculated. After determining the additional amount of antioxidant, the additional amount of antioxidant is additionally added to the regenerated turbine oil (addition step S6).
除去ステップＳ１及び添加ステップＳ２の後に、測定ステップＳ３から追添加ステップＳ６の各ステップを行うことにより、再生タービン油に添加したさび止め剤の量が多すぎてＲＰＶＯＴ値が低くなっても、酸化防止剤を追添加することによりＲＰＶＯＴ値を上昇させることができる。 By performing each step from the measurement step S3 to the additional addition step S6 after the removal step S1 and addition step S2, even if the amount of rust inhibitor added to the recycled turbine oil is too large and the RPVOT value becomes low, oxidation can be prevented. The RPVOT value can be increased by additionally adding an inhibitor.
上記各実施形態に記載の内容は、例えば以下のように把握される。 The contents described in each of the above embodiments can be understood as follows, for example.
［１］一の態様に係るタービン油の再生方法は、
使用済みのタービン油の再生方法であって、
使用済みの前記タービン油から劣化成分を除去する除去ステップと、
前記除去ステップで得られた再生タービン油にさび止め剤及び酸化防止剤を添加する添加ステップと
を含み、
前記さび止め剤の添加量は、前記再生タービン油の質量に対して０．０１～０．０４％の質量であり、前記酸化防止剤の添加量は、該酸化防止剤の種類に応じて予め決められた範囲の濃度となる質量である。
[1] A method for regenerating turbine oil according to one aspect includes:
A method for regenerating used turbine oil, the method comprising:
a removal step of removing degraded components from the used turbine oil;
an addition step of adding a rust inhibitor and an antioxidant to the recycled turbine oil obtained in the removal step,
The amount of the rust inhibitor added is 0.01 to 0.04% by mass based on the mass of the recycled turbine oil, and the amount of the antioxidant added is determined in advance according to the type of the antioxidant. This is the mass that results in a concentration within a determined range.
本開示のタービン油の再生方法によれば、使用済みのタービン油から劣化成分を除去した再生タービン油にさび止め剤及び酸化防止剤を添加し、さび止め剤の添加量が再生タービン油の質量に対して０．０１～０．０４％の質量であることにより、さび止め性能と酸化防止性能とが両立可能なタービン油を再生することができる。 According to the turbine oil regeneration method of the present disclosure, a rust inhibitor and an antioxidant are added to the regenerated turbine oil from which deterioration components have been removed from used turbine oil, and the amount of the rust inhibitor added is determined by the mass of the regenerated turbine oil. By having a mass of 0.01 to 0.04% relative to the amount of carbon dioxide, it is possible to regenerate turbine oil that has both anti-rust performance and anti-oxidation performance.
［２］別の態様に係るタービン油の再生方法は、［１］のタービン油の再生方法であって、
前記さび止め剤及び前記酸化防止剤が添加された前記再生タービン油のＲＰＶＯＴ値を測定する測定ステップと、
前記測定ステップで測定されたＲＰＶＯＴ値に基づいて、前記再生タービン油に前記酸化防止剤を追添加する必要があるか否かを判定する判定ステップと、
前記判定ステップにおいて前記酸化防止剤の追添加をする必要があると判定した場合に、前記測定ステップで測定されたＲＰＶＯＴ値に基づいて、前記酸化防止剤の追添加量を決定する決定ステップと、
前記決定ステップで決定した前記追添加量の前記酸化防止剤を前記再生タービン油に追添加する追添加ステップと
を含む。
[2] A turbine oil regeneration method according to another aspect is the turbine oil regeneration method of [1], comprising:
a measuring step of measuring an RPVOT value of the recycled turbine oil to which the rust inhibitor and the antioxidant are added;
a determination step of determining whether or not it is necessary to additionally add the antioxidant to the regenerated turbine oil based on the RPVOT value measured in the measurement step;
a determining step of determining an additional amount of the antioxidant based on the RPVOT value measured in the measuring step when it is determined in the determining step that it is necessary to additionally add the antioxidant;
and an additional addition step of additionally adding the antioxidant in the additional amount determined in the determining step to the regenerated turbine oil.
このような再生方法によれば、再生タービン油に添加したさび止め剤の量が多すぎてＲＰＶＯＴ値が低くなっても、酸化防止剤を追添加することによりＲＰＶＯＴ値を上昇させることができる。 According to such a regeneration method, even if the RPVOT value becomes low due to too large an amount of rust inhibitor added to the regenerated turbine oil, the RPVOT value can be increased by additionally adding an antioxidant.
Claims (2)
使用済みの前記タービン油から劣化成分を除去する除去ステップと、
前記除去ステップで得られた再生タービン油にさび止め剤及び酸化防止剤を添加する添加ステップと
を含み、
前記さび止め剤の添加量は、前記再生タービン油の質量に対して０．０１～０．０４％の質量であり、前記酸化防止剤の添加量は、該酸化防止剤の種類に応じて予め決められた範囲の濃度となる質量である、タービン油の再生方法。 A method for regenerating used turbine oil, the method comprising:
a removal step of removing degraded components from the used turbine oil;
an addition step of adding a rust inhibitor and an antioxidant to the recycled turbine oil obtained in the removal step,
The amount of the rust inhibitor added is 0.01 to 0.04% by mass based on the mass of the recycled turbine oil, and the amount of the antioxidant added is determined in advance according to the type of the antioxidant. A method of regenerating turbine oil, which mass has a concentration within a defined range.
前記測定ステップで測定されたＲＰＶＯＴ値に基づいて、前記再生タービン油に前記酸化防止剤を追添加する必要があるか否かを判定する判定ステップと、
前記判定ステップにおいて前記酸化防止剤の追添加をする必要があると判定した場合に、前記測定ステップで測定されたＲＰＶＯＴ値に基づいて、前記酸化防止剤の追添加量を決定する決定ステップと、
前記決定ステップで決定した前記追添加量の前記酸化防止剤を前記再生タービン油に追添加する追添加ステップと
を含む、請求項１に記載のタービン油の再生方法。 a measuring step of measuring an RPVOT value of the recycled turbine oil to which the rust inhibitor and the antioxidant are added;
a determination step of determining whether or not it is necessary to additionally add the antioxidant to the regenerated turbine oil based on the RPVOT value measured in the measurement step;
a determining step of determining an additional amount of the antioxidant based on the RPVOT value measured in the measuring step when it is determined in the determining step that it is necessary to additionally add the antioxidant;
The method for regenerating turbine oil according to claim 1, further comprising an additional addition step of adding the additional amount of the antioxidant determined in the determining step to the regenerated turbine oil.
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| JP2022115598A JP2024013483A (en) | 2022-07-20 | 2022-07-20 | Turbine oil regeneration method |
| PCT/JP2023/006907 WO2024018673A1 (en) | 2022-07-20 | 2023-02-27 | Recovery method for turbine oil |
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| JP2022115598A JP2024013483A (en) | 2022-07-20 | 2022-07-20 | Turbine oil regeneration method |
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| JPS6018575A (en) * | 1983-07-08 | 1985-01-30 | Toyota Central Res & Dev Lab Inc | Removal of peroxide from degraded oil |
| US20130045903A1 (en) * | 2011-08-15 | 2013-02-21 | Robert O. Crowder | Process and Apparatus to Remove Oxidation Products from Used Oil |
| JP6544557B2 (en) * | 2015-03-04 | 2019-07-17 | 国立大学法人福井大学 | Method and system for extracting oxidation product |
| JP2018062601A (en) * | 2016-10-14 | 2018-04-19 | 日本特殊陶業株式会社 | Reduction method and reductor for antioxidant |
| JP2018063218A (en) * | 2016-10-14 | 2018-04-19 | 日本特殊陶業株式会社 | Oil state control device |
| JP7444644B2 (en) * | 2020-03-06 | 2024-03-06 | 出光興産株式会社 | Lubricating oil composition and method of using the lubricating oil composition |
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