EP3831914B1 - 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
EP3831914B1
EP3831914B1 EP20211199.3A EP20211199A EP3831914B1 EP 3831914 B1 EP3831914 B1 EP 3831914B1 EP 20211199 A EP20211199 A EP 20211199A EP 3831914 B1 EP3831914 B1 EP 3831914B1
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EP
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Prior art keywords
diathermic oil
impurities
oil
diathermic
removal
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English (en)
French (fr)
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EP3831914A1 (de
Inventor
Gilberto TANI
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Oil Service Srl
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Oil Service Srl
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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
  • 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)

Claims (9)

  1. Verfahren zur Entfernung von Verunreinigungen aus diathermischem Öl in einem Kreislauf (100), umfassend die folgenden Schritte:
    - Entnahme einer Probe von diathermischem Öl aus dem besagten Kreislauf (100);
    - Unterwerfen der besagten Probe von diathermischem Öl einem Labortest, um die Alterung des Öls und das Vorhandensein von kohlenstoffhaltigen Ablagerungen zu überprüfen;
    - Absaugung des besagten diathermischen Öls aus dem besagten Kreislauf (100);
    - Unterwerfen des besagten diathermischen Öls einem Filtrationsprozess;
    - Wiedereinführung des besagten diathermischen Öls in den besagten Kreislauf (100) nach dem besagten Filtrationsprozess,
    dadurch gekennzeichnet, dass:
    - der besagte Labortest den Schritt der Messung des kinematischen Viskositätswerts des besagten diathermischen Öls bei einer Temperatur von 40°C umfasst und den gemessenen Wert mit einem Referenzwert vergleicht;
    - wenn der besagte gemessene kinematische Viskositätswert größer als der besagte Referenzwert ist, der besagte Schritt der Absaugung des besagten diathermischen Öls aus dem besagten Kreislauf (100) den Schritt umfasst, das besagte diathermische Öl auf eine Temperatur von ≤ 80°C zu bringen, bevor das besagte diathermische Öl dem besagten Filtrationsprozess unterworfen wird;
    - der besagte Schritt des Unterwerfens des besagten diathermischen Öls den Schritt der Wahl zwischen statischer Filtration oder dynamischer Filtration umfasst, der von dem gemessenen Viskositätswert abhängt,
    wobei:
    - der besagte Schritt der statischen Filtration den Schritt des Bereitstellens einer statischen Filtrationseinheit (10), die mindestens einen Kerzenfilter (F1, F2) umfasst, und des Zuführens des besagten diathermischen Öls zu dem besagten mindestens einen Kerzenfilter (F1, F2) umfasst,
    - der besagte Schritt der dynamischen Filtration den Schritt des Bereitstellens einer dynamischen Filtrationseinheit (20), umfassend einen Zentrifugalseparator (S), der mit einen inneren Trommel (24) versehen ist, und das Zuführen des besagten diathermischen Öls zu dem besagten Zentrifugalseparator (S) umfasst.
  2. Verfahren zur Entfernung von Verunreinigungen aus diathermischem Öl gemäß Anspruch 1, dadurch gekennzeichnet, dass der besagte kinematische Viskositätsreferenzwert 35 cSt beträgt.
  3. Verfahren zur Entfernung von Verunreinigungen aus diathermischem Öl gemäß Anspruch 1, dadurch gekennzeichnet, dass, wenn der besagte kinematische Viskositätswert zwischen 35 und 38 cSt liegt, der besagte Filtrationsprozess den Schritt der statischen Filtration umfasst.
  4. Verfahren zur Entfernung von Verunreinigungen aus diathermischem Öl gemäß Anspruch 3, dadurch gekennzeichnet, dass, wenn der besagte kinematische Viskositätswert > 38 cSt ist, der besagte Filtrationsprozess den Schritt der dynamischen Filtration umfasst.
  5. Vorrichtung (1) zur Entfernung von Verunreinigungen aus diathermischem Öl in einem Kreislauf (100), umfassend:
    - mindestens eine Pumpe (P1, P2) zur Absaugung des besagten diathermischen Öls aus dem besagten Kreislauf (100);
    - mindestens eine Filtermaschine, die geeignet ist, die in dem besagten diathermischen Öl vorhandenen Verunreinigungen zurückzuhalten, und die stromabwärts der besagten mindestens einen Pumpe (P1, P2) angeordnet ist, dadurch gekennzeichnet, dass:
    - die besagte Vorrichtung (1) mindestens einen Kühler (A, A1, A2, A3, A4) für das besagte diathermische Öl umfasst, der stromaufwärts von der besagten Filtermaschine (10) vorgesehen ist;
    - die besagte Filtermaschine eine statische Filtrationseinheit (10) und eine dynamische Filtrationseinheit (20) umfasst, die parallel zueinander angeordnet sind,
    wobei:
    - die besagte Filtrationseinheit (10) mindestens einen Kerzenfilter (F1, F2) mit einer Filterkapazität von ≤ 30 Mikron umfasst;
    - die besagte Filtrationseinheit (20) einen Zentrifugalseparator (S) umfasst, umfassend:
    - eine Zentrifugalkammer (21), die mit einem Einlass (22) für das besagte diathermische Öl, das Verunreinigungen enthält, und einem Auslass (23) für das behandelte diathermische Öl versehen ist;
    - eine Trommel (24) mit Filtermedien, die in der besagten Zentrifugalkammer (21) angeordnet ist und mit dem besagten Einlass (22) in Verbindung steht;
    - einen Sammelbehälter (25) für die aus dem besagten Öl abgeschiedenen Verunreinigungen, der außerhalb der besagten Trommel (24) angeordnet ist, wobei die besagte Vorrichtung (1) Mittel umfasst, um zwischen der statischen Filtrationseinheit (10) und der dynamischen Filtrationseinheit (20), die von einem kinematischen Viskositätswert abhängig sind, zu wählen, der mit einer vorläufigen Laboranalyse nach der Methode ASTM D445 ermittelt wurde, die auf eine Probe diathermischen Öls angewendet wurde, das dem Kreislauf (100) bei einer Temperatur von 40°C entnommen wurde.
  6. Vorrichtung (1) zur Entfernung von Verunreinigungen aus diathermischem Öl gemäß Anspruch 5, dadurch gekennzeichnet, dass sie eine erste (P1) und eine zweite (P2) Pumpe umfasst, die parallel angeordnet sind, um das besagte diathermische Öl aus dem besagten Kreislauf (100) abzusaugen, und die eine Durchflussmenge von 4000 Liter/Stunde, bzw. 9000 Liter/Stunde besitzen, und dadurch, dass die besagte statische Filtrationseinheit(10) einen ersten (F1) und einen zweiten (F2) Kerzenfilter mit einer Filterkapazität zwischen 10 und 30 Mikron umfasst, die geeignet sind, die in dem besagten diathermischen Öl vorhandenen Verunreinigungen zurückzuhalten, und die stromabwärts der besagten Pumpen (P1, P2) angeordnet sind.
  7. Vorrichtung (1) zur Entfernung von Verunreinigungen aus diathermischem Öl gemäß Anspruch 5, dadurch gekennzeichnet, dass sie einen Magnetfilter (FM) umfasst, um die eisenhaltigen Verunreinigungen des besagten diathermischen Öls zurückzuhalten, der stromaufwärts von der besagten mindestens einen Pumpe (P1, P2) vorgesehen ist.
  8. Vorrichtung (1) zur Entfernung von Verunreinigungen aus diathermischem Öl gemäß Anspruch 5, dadurch gekennzeichnet, dass sie einen Metallmaschenfilter (FA) mit einer Filterkapazität von 90 Mikron umfasst, der stromaufwärts von der besagten mindestens einen Pumpe (P1, P2) vorgesehen ist.
  9. Vorrichtung (1) zur Entfernung von Verunreinigungen aus diathermischem Öl gemäß Anspruch 5, dadurch gekennzeichnet, dass sie einen automatischen Entlüfter (DA) umfasst, der stromabwärts von der besagten Filtermaschine angeordnet ist und geeignet ist, alle Luftblasen, die in dem besagten Kreislauf (100) vorhanden sind, zu beseitigen.
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

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DE20211556U1 (de) * 2002-07-12 2003-11-20 Hengst Gmbh & Co Kg Vorrichtung zum Abtrennen von Verunreinigungen aus dem Schmieröl einer Brennkraftmaschine
RU2525485C2 (ru) * 2008-10-27 2014-08-20 Маркус Кемпер Способ мобильной очистки и модуль мобильной очистки текучих сред

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