EP3831914A1 - Procede d'elimination des impuretes de l'huile diathermique et de l'appareil mise en oeuvre de cette methode - Google Patents
Procede d'elimination des impuretes de l'huile diathermique et de l'appareil mise en oeuvre de cette methode Download PDFInfo
- 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
- Authority
- 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
Links
- 239000012535 impurity Substances 0.000 title claims abstract description 50
- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000001914 filtration Methods 0.000 claims abstract description 98
- 230000003068 static effect Effects 0.000 claims abstract description 27
- 238000009533 lab test Methods 0.000 claims abstract description 7
- 230000032683 aging Effects 0.000 claims abstract description 4
- 238000011144 upstream manufacturing Methods 0.000 claims description 9
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 claims description 3
- 238000005276 aerator Methods 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 abstract description 4
- 239000003921 oil Substances 0.000 description 94
- 239000010802 sludge Substances 0.000 description 9
- 230000008569 process Effects 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 3
- 238000005336 cracking Methods 0.000 description 3
- 238000006731 degradation reaction Methods 0.000 description 3
- 238000005755 formation reaction Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- OFBQJSOFQDEBGM-UHFFFAOYSA-N Pentane Chemical compound CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 230000008030 elimination Effects 0.000 description 2
- 238000003379 elimination reaction Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000007857 degradation product Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Images
Classifications
-
- 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.
Landscapes
- 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)
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 (fr) | 2021-06-09 |
EP3831914B1 EP3831914B1 (fr) | 2022-06-15 |
Family
ID=70154890
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20211199.3A Active EP3831914B1 (fr) | 2019-12-03 | 2020-12-02 | Procede d'elimination des impuretes de l'huile diathermique et de l'appareil mise en oeuvre de cette methode |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP3831914B1 (fr) |
IT (1) | IT201900022791A1 (fr) |
Cited By (1)
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)
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 |
-
2019
- 2019-12-03 IT IT102019000022791A patent/IT201900022791A1/it unknown
-
2020
- 2020-12-02 EP EP20211199.3A patent/EP3831914B1/fr active Active
Patent Citations (2)
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)
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 |
---|---|
EP3831914B1 (fr) | 2022-06-15 |
IT201900022791A1 (it) | 2021-06-03 |
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