EP3831914A1 - Verfahren zur entfernung von verunreinigungen aus diathermischem öl und vorrichtung dieses verfahren durchzuführen - Google Patents

Verfahren zur entfernung von verunreinigungen aus diathermischem öl und vorrichtung dieses verfahren durchzuführen Download PDF

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Publication number
EP3831914A1
EP3831914A1 EP20211199.3A EP20211199A EP3831914A1 EP 3831914 A1 EP3831914 A1 EP 3831914A1 EP 20211199 A EP20211199 A EP 20211199A EP 3831914 A1 EP3831914 A1 EP 3831914A1
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EP
European Patent Office
Prior art keywords
diathermic oil
oil
impurities
diathermic
circuit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP20211199.3A
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English (en)
French (fr)
Other versions
EP3831914B1 (de
Inventor
Gilberto TANI
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Oil Service Srl
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Oil Service Srl
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Filing date
Publication date
Application filed by Oil Service Srl filed Critical Oil Service Srl
Publication of EP3831914A1 publication Critical patent/EP3831914A1/de
Application granted granted Critical
Publication of EP3831914B1 publication Critical patent/EP3831914B1/de
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    • 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
    • C10M175/0058—Working-up used lubricants to recover useful products ; Cleaning by filtration and centrifugation processes; 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
    • C10M175/0091—Treatment of oils in a continuous lubricating circuit (e.g. motor oil system)
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
    • C10N2030/02—Pour-point; Viscosity index

Definitions

  • the invention relates to the field of maintenance of industrial systems that use oils at high temperatures and, more in detail, the invention concerns a method for the removal of impurities from diathermic oil, i.e., the elimination of sludge present therein, and an apparatus implementing this method.
  • Diathermic oil is exposed to high thermal deterioration and to oxidation, leading to the formation of oil degradation products, even thick tar-like formations, which are conveyed by the oil inside the system.
  • This method is performed with the system operating and the oil passes through the filter media at the operating temperature of around 250-270°C, temperature maintained constant for the entire process.
  • the document US 2016/076415 A1 discloses a method and an apparatus for cleaning an oil of a lubrication circuit of a motor vehicle, where said apparatus comprises a pump, an instrument for measuring the viscosity of the oil, means for varying the temperature of said oil and a single filtration unit comprising at least one filter.
  • the filtration described is a static filtration.
  • the invention intends to overcome these limits, defining a new method capable of eliminating impurities, sludge and, more in general, all the heavy fractions at low temperature without stressing and causing further degradation of the oil, avoiding possible further degradation of the molecules, simultaneously restoring the conditions of safety of the system, thereby ensuring greater safety of the operators and a reduction in maintenance costs and downtime.
  • said kinematic viscosity reference value is 35 cSt.
  • said filtration process comprises the step of static filtration.
  • said filtration process comprises the step of dynamic filtration.
  • the invention also relates to an apparatus for the removal of impurities from diathermic oil in a circuit, comprising:
  • said apparatus comprises a first and a second pump, placed in parallel, for drawing said diathermic oil from said circuit, having a flow rate of 4000 litres/hour and 9000 litres/hour, respectively, and said static filtration unit comprises a first and a second cartridge filter, with a filtering capacity of between 10 and 30 microns, adapted to retain the impurities present in said diathermic oil, placed downstream of said pumps.
  • said apparatus comprises a magnetic filter to retain the ferrous impurities of said diathermic oil provided upstream of said at least one pump.
  • said apparatus comprises a metallic mesh filter with a filtering capacity of 90 microns, provided upstream of said at least one pump.
  • said apparatus comprises an automatic de-aerator, placed downstream of said filtering machine, adapted to eliminate any air bubbles present in said circuit.
  • the value detected is in fact compared with a kinematic viscosity reference value.
  • the reference value that optimizes cost and benefit is 35 cSt.
  • the first step of the method according to the invention is a step of analysing and evaluating the diathermic oil to be treated: determination of the kinematic viscosity value of the oil is the most important operation of the entire process and is carried out analytically in the laboratory using the ASTM D445 method applied to a sample of diathermic oil taken from the system and at a temperature of 40°.
  • the central step of the method for the removal of impurities takes place in bypass, in parallel to the system, with the circulation pumps of the system operating, and can be performed with the system operating, with diathermic oil at operating temperature.
  • chillers of know type are used to cool the oil; these are placed in series and the oil flows through them before reaching the filtration step.
  • the most suitable filtration process is chosen, depending on the kinematic viscosity value detected in preliminary analysis step.
  • the diathermic oil is reintroduced into the system at the filtration temperature and immediately taken to the operating temperature by the heating means of the system.
  • the subsequent steps substantially provide for reiteration of the operations described above for n-times, depending on the kinematic viscosity value detected indicative of the presence or absence of impurities in the oil.
  • the process terminates when gradually all the impurities have been eliminated and the viscosity value detected is ⁇ 35 cSt or in any case below the initial viscosity value by at least 3-4 cSt.
  • FIG. 1 there is illustrated a portion of an industrial system 100 that internally uses diathermic oil to supply energy to machines M, comprising:
  • a system 100 of this type is provided with an apparatus 1 for the removal of solid impurities, sludge and residues, from said oil, comprising a chiller A and a filtering machine 10, 20.
  • the point for drawing the diathermic oil to be treated with said apparatus 1 is placed in the lowest point of the system along a specific discharge line 103, while the point for re-introduction of the treated oil is placed upstream of the pump P of the system.
  • the oil to be treated could be temporarily discharged from the system to a collection tank 104 placed along said discharge line 103, and be drawn from this tank to be sent to the apparatus 1 for the removal of impurities.
  • FIG. 2 there is illustrated a diagram of the main components of an apparatus 1 for the removal of impurities from diathermic oil arranged to implement the aforesaid method, in the case of use in bypass, with the system operating.
  • Said apparatus 1 essentially comprises:
  • said filtering machine MF comprises:
  • said static filtration unit 10 and said dynamic filtration unit 20 are placed in parallel to one another.
  • a series of chillers A1, A2, A3, A4 provided on said apparatus 1, capable of taking the temperature of the diathermic oil from an initial value of 250°C to a final value of 70-80° prior to the filtration process.
  • said static filtration unit 10 comprises:
  • filtration means FM and FA of the inflowing diathermic oil Upstream of said pumps P1, P2 there are provided filtration means FM and FA of the inflowing diathermic oil, adapted to perform an initial cleaning of the oil and facilitate the subsequent work of the cartridge filters F1, F2.
  • Said filtration means comprise a magnetic filter FM for ferrous impurities and a metallic mesh filter FA for sludge with a filtering capacity of 90 micron.
  • Said apparatus 1 also comprises an automatic de-aerator DA, placed downstream of said cartridge filters F1, F2 adapted to eliminate any air bubbles present in said circuit.
  • said dynamic filtration unit 20 comprises a centrifugal separator S, which essentially comprises:
  • the apparatus 1 described can operate managed by an engineer, entirely in manual mode, who, depending on the information collected on the temperature and on the degree of kinematic viscosity of the oil measured before starting operations, adjusts the chillers A, A1, A2, A3, A4 and chooses the most appropriate filtration process, opening or closing the valves 2, 3 placed upstream of the static filtration unit 10 or of the dynamic filtration unit 20.
  • said apparatus 1 can comprise a control unit capable of performing the adjustments described above in completely automatic mode. After entering the data required and the comparison parameters of the various viscosities in said control unit, it can adjust the operating temperature of the oil or the most suitable filtration process directly.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Lubricants (AREA)
  • Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
EP20211199.3A 2019-12-03 2020-12-02 Verfahren zur entfernung von verunreinigungen aus diathermischem öl und vorrichtung dieses verfahren durchzuführen Active EP3831914B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT102019000022791A IT201900022791A1 (it) 2019-12-03 2019-12-03 Procedimento per la rimozione di impurita’ da olio diatermico ed apparecchiatura che attua tale procedimento

Publications (2)

Publication Number Publication Date
EP3831914A1 true EP3831914A1 (de) 2021-06-09
EP3831914B1 EP3831914B1 (de) 2022-06-15

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Application Number Title Priority Date Filing Date
EP20211199.3A Active EP3831914B1 (de) 2019-12-03 2020-12-02 Verfahren zur entfernung von verunreinigungen aus diathermischem öl und vorrichtung dieses verfahren durchzuführen

Country Status (2)

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EP (1) EP3831914B1 (de)
IT (1) IT201900022791A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114184515A (zh) * 2021-12-09 2022-03-15 中国特种设备检测研究院 一种丙酮不溶物实验检验方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050236322A1 (en) * 2002-07-12 2005-10-27 Dieter Baumann Device for separating impurities from the lubricating oil of an Internal combustion engine
US20160076415A1 (en) 2008-10-27 2016-03-17 Markus Kemper Mobile cleaning method and mobile cleaning module for fluids

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050236322A1 (en) * 2002-07-12 2005-10-27 Dieter Baumann Device for separating impurities from the lubricating oil of an Internal combustion engine
US20160076415A1 (en) 2008-10-27 2016-03-17 Markus Kemper Mobile cleaning method and mobile cleaning module for fluids

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114184515A (zh) * 2021-12-09 2022-03-15 中国特种设备检测研究院 一种丙酮不溶物实验检验方法

Also Published As

Publication number Publication date
IT201900022791A1 (it) 2021-06-03
EP3831914B1 (de) 2022-06-15

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