EP3790682B1 - Utilisation d'un lubrifiant et échangeur de chaleur - Google Patents

Utilisation d'un lubrifiant et échangeur de chaleur Download PDF

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Publication number
EP3790682B1
EP3790682B1 EP19722793.7A EP19722793A EP3790682B1 EP 3790682 B1 EP3790682 B1 EP 3790682B1 EP 19722793 A EP19722793 A EP 19722793A EP 3790682 B1 EP3790682 B1 EP 3790682B1
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EP
European Patent Office
Prior art keywords
lubricant
heat exchanger
cleaning element
threaded spindle
contact surface
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.)
Active
Application number
EP19722793.7A
Other languages
German (de)
English (en)
Other versions
EP3790682C0 (fr
EP3790682A1 (fr
Inventor
Ekkehardt Klein
Christoph Nagl
Andreas POLLAK
Werner Muchitsch
Mathias KURRAS
Michael Hernegger
Thomas Karoschitz
Leopold Hauser
Robert Adler
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.)
RAG Austria AG
Linde GmbH
Original Assignee
RAG Austria AG
Linde GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by RAG Austria AG, Linde GmbH filed Critical RAG Austria AG
Publication of EP3790682A1 publication Critical patent/EP3790682A1/fr
Application granted granted Critical
Publication of EP3790682B1 publication Critical patent/EP3790682B1/fr
Publication of EP3790682C0 publication Critical patent/EP3790682C0/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28G—CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
    • F28G1/00—Non-rotary, e.g. reciprocated, appliances
    • F28G1/08—Non-rotary, e.g. reciprocated, appliances having scrapers, hammers, or cutters, e.g. rigidly mounted
    • 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
    • C10M169/00—Lubricating compositions characterised by containing as components a mixture of at least two types of ingredient selected from base-materials, thickeners or additives, covered by the preceding groups, each of these compounds being essential
    • C10M169/04—Mixtures of base-materials and additives
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/10—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged one within the other, e.g. concentrically
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F19/00—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers
    • F28F19/02—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers by using coatings, e.g. vitreous or enamel coatings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28G—CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
    • F28G1/00—Non-rotary, e.g. reciprocated, appliances
    • F28G1/14—Pull-through rods
    • 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
    • C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
    • C10M2201/04—Elements
    • C10M2201/041—Carbon; Graphite; Carbon black
    • 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
    • C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
    • C10M2201/06—Metal compounds
    • C10M2201/065—Sulfides; Selenides; Tellurides
    • C10M2201/066—Molybdenum sulfide
    • 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
    • C10M2213/00—Organic macromolecular compounds containing halogen as ingredients in lubricant compositions
    • C10M2213/06—Perfluoro polymers
    • C10M2213/062—Polytetrafluoroethylene [PTFE]
    • C10M2213/0623—Polytetrafluoroethylene [PTFE] used as base material

Definitions

  • the invention relates to a use of a lubricant to reduce friction for a cleaning device of a heat exchanger and a heat exchanger.
  • the invention is therefore particularly in the field of heat exchangers.
  • Heat exchangers for warming or cooling a working medium are widely known from the prior art. Without restricting generality, the working medium natural gas will be examined in more detail below. Natural gas from ground storage often has a particularly high percentage of undesirable accompanying substances and particularly high water content. It is desirable to remove the accompanying substances and the water content from the natural gas before it is used for further purposes. One possibility for this is cooling the natural gas in one or more steps to suitable low temperatures. In particular, liquefying the natural gas can be useful here.
  • Condensing and freezing accompanying substances such as water, CO 2 and hydrocarbon compounds are deposited on the heat transfer surfaces and thus reduce heat transfer. Even at operating temperatures above the freezing point of water, methane hydrate can also form on the heat transfer surfaces.
  • Cylinder tubes of heat exchangers can therefore be provided with a cleaning device, by means of which deposits are removed from the heat transfer surfaces the cylinder tubes can be removed mechanically.
  • a cleaning device by means of which deposits are removed from the heat transfer surfaces the cylinder tubes can be removed mechanically.
  • Such cleaning devices often have a high degree of friction and wear, since many conventional lubricants cannot be used in the temperature ranges prevailing in the heat exchanger. In addition, lubricant secretions can lead to contamination of the working medium to be heated or cooled in the heat exchanger.
  • the writing reveals a lubricant with a similar composition JP-2007 262368 A .
  • the invention relates to the use of a lubricant comprising at least 30% polytetrafluoroethylene, at least 0.5% graphite, and at least 0.5% molybdenum disulfide.
  • the lubricant is used to reduce friction for a cleaning device of a heat exchanger used for cooling and/or liquefying gases at temperatures between 0 and 273K.
  • the invention relates to a heat exchanger with a cylinder tube and a cleaning device with the features of claim 4.
  • first and/or the second contact surface are at least partially coated with a lubricant means that the first and/or the second contact point is at least partially coated with the lubricant. In other words, it is not absolutely necessary, although advantageous, for the entire first contact surface and/or the entire second contact surface to be coated with the lubricant. In addition, locations of the cylinder tube and/or the threaded spindle and/or the cleaning element that do not form part of the first and/or the second contact surface can also be coated with the lubricant.
  • the invention offers the advantage that a reduction in friction between the cylinder tube and/or the threaded rod can be achieved, whereby material abrasion and/or wear on the cleaning device and/or on the heat exchanger can also be avoided. This in turn allows repair-related downtimes or downtimes to be reduced and/or required maintenance effort to be reduced. This means operating costs can be reduced.
  • a less powerful drive element or a less powerful motor may be sufficient than is required for conventional heat exchangers.
  • the invention offers the advantage that an effective reduction in friction can be achieved with the lubricant according to the invention even at very low temperatures, such as those which prevail in particular when cooling and/or liquefying gases in the heat exchanger.
  • the lubricant according to the invention is suitable for ensuring reliable lubrication of the surfaces provided with it even at temperatures between 0 K and 273 K.
  • the invention offers the advantage that the lubricant according to the invention can also be used at significantly lower temperatures conventional lubricants that are based on oils and/or fats and therefore typically lose a high degree of lubricating effect below a temperature of approximately 223 K, and also freeze and/or solidify and thus almost completely lose their lubricating effect.
  • the lubricant preferably comprises at most 99% polytetrafluoroethylene and/or at most 50% graphite and/or at most 50% molybdenum disulfide or consists of these proportions. More preferably, the lubricant comprises at least 80% and at most 99% polytetrafluoroethylene and / or at least 0.5% and at most 2% graphite and / or at least 0.5% and at most 2% molybdenum disulfide or consists of these proportions.
  • This offers the advantage that particularly advantageous properties of the lubricant can be achieved with regard to the lubricating effect and temperature stability.
  • a high proportion of polytetrafluoroethylene can lead to particularly advantageous properties at low temperatures.
  • the cylinder tube preferably has at least one guide groove on the inner wall, the first contact surface being at least partially formed by the guide groove. This allows a precise and controlled movement of the cleaning element to be achieved, which can be designed to follow the guide groove when the threaded spindle rotates.
  • the cleaning element can have one or more external grooves, which can be designed to engage in the at least one guide groove of the cylinder tube.
  • the threaded spindle preferably has an external thread and the cleaning element has an internal thread, which at least partially form the second contact surface. This offers the advantage that rotating the threaded rod about the longitudinal axis, which runs in the axial direction, results in the cleaning element moving in the axial direction.
  • a layer thickness of the lubricant on the first contact surface and/or on the second contact surface is at least 20 ⁇ m and at most 200 ⁇ m, particularly preferably at least 50 ⁇ m and at most 100 ⁇ m.
  • the lubricant can be distributed in a uniform thickness or in an uneven thickness over the respective contact surface or at least a part of it.
  • the lubricant can be arranged on the first contact surface in a different thickness or in the same thickness as on the second contact surface.
  • the lubricant can be applied to one or two sides of the first contact surface and/or the second contact surface.
  • the lubricant can be attached to the inner wall of the cylinder tube or in the at least one guide groove or on an outer surface of the cleaning element or both on the inner wall of the cylinder tube or in the at least one guide groove and on an outer surface of the cleaning element . Accordingly, the lubricant can be attached to the threaded spindle or to the cleaning element or both to the threaded spindle and to the cleaning element on the second contact surface.
  • the coating can be carried out, for example, by spray-sintering processes.
  • the coating forms a PTFE (Teflon ® ) compound in a solid state in which the dry lubricants graphite and MoS 2 are arranged.
  • the cleaning element at least partially has or consists of a surface coating comprising carbon or made of carbon.
  • the cleaning element has a coating that differs from the lubricating material, but which can also serve to reduce friction.
  • the surface coating particularly preferably has or consists of a hydrogen-containing, amorphous carbon layer. This offers the advantage that a particularly good reduction in friction can be achieved through interaction of the surface coating of the cleaning element with the lubricant.
  • FIG. 1 shows schematically a longitudinal section through an embodiment of a heat exchanger 13, as it can be used in particular for cooling natural gas.
  • the heat exchanger 13 has an outer cylinder tube 1 which surrounds a cylinder tube which is designed as a cooling coil 2.
  • This cooling coil 2 has at least one, preferably spiral-shaped, channel 23 on its outer surface, which serves to guide a coolant.
  • This channel 23 is created by a corresponding coil 21 on the outer surface of the cooling coil 2.
  • the inner surface of the hollow cylindrical cooling coil 2 has guide grooves 22 which serve to guide a cleaning element 12, which is also referred to as a scraper.
  • the cleaning element 12 can be designed as an ice scraper.
  • the heat exchanger 13 has a cleaning device 10, which has a threaded spindle 3 located inside the cooling coil 2 and running in an axial direction 100.
  • the threaded spindle 3 is driven via a coupling element 30 and is mounted in a bearing point, which is preferably designed as an axial/radial mixed bearing 5.
  • a bearing point which is preferably designed as an axial/radial mixed bearing 5.
  • At the other end of the heat exchanger 13 there can also be a thermally decoupled condensate reservoir and a heating element for heating condensate in the condensate reservoir in order to melt and remove the condensate conveyed there by the cleaning element 12.
  • the cleaning element 12 is displaced on the threaded spindle 3 along the cooling coil 2 in the axial direction.
  • a threaded spindle 3 for example with a trapezoidal profile, is used. A reversal of the direction of movement of the scraper 12 requires a reversal of the direction of rotation of the threaded spindle 3.
  • the cylinder tube or the cooling coil 2 is coated on the inner wall 2a with a lubricant, which serves to reduce the friction between the cleaning element 12 and the cooling coil 2, which form a first contact surface.
  • the lubricant comprises polytetrafluoroethylene, graphite and molybdenum sulfide.
  • the outside of the cleaning element 12 facing the inner wall 21a of the cylinder tube or the cooling coil 2 can be coated with the lubricant.
  • the external thread of the threaded spindle 3 and/or the internal thread of the cleaning element 12 is also coated with the lubricant in order to reduce the friction at this contact point as well.
  • moist, contaminated working medium for example, is guided into the space between the threaded spindle 3 and between the cooling coil 2 or into the interior of the cylinder tube via a working medium inlet opening 14 on both sides and flows in the axial direction 100 to the working medium outlet opening (not shown ) at the other end of the heat exchanger 13.
  • the working medium flows on the inner surface of the hollow cylindrical cooling coil 2 along the axial direction 100.
  • Coolant is supplied to the space between the cooling coil 2 and the outer cylinder tube 1 via a coolant inlet opening 16 on both sides, which flows to the other end of the heat exchanger 13 flows and leaves it through the coolant outlet opening (not shown).
  • the coolant flows spirally in the axial direction in the channel 23 formed between the outer cylinder tube 1 and the cooling coil 2. The coolant removes heat from the cooling coil 2, so that heat is in turn removed from the working medium.
  • nitrogen can be used as an accompanying substance at high pressure (e.g. at 10 bar) using liquid nitrogen low Pressure (e.g. at 1 bar), caused by the different pressure-dependent phase transitions, are liquefied and separated.
  • the heat exchanger 13 proposed here can therefore also be used to liquefy nitrogen.
  • the threaded spindle 3 is rotated by a drive element via the coupling element.
  • the cleaning element 12, which engages in the thread of the threaded spindle 3 and thereby forms a second contact surface, is thereby set into a translational movement in the axial direction.
  • the movement of the cleaning element 12 can take place with little friction due to the lubricant provided on the two contact surfaces.
  • the cleaning element 12 takes the above-mentioned condensed accompanying substances with it. When they reach the condensate reservoir at the other end of the heat exchanger, these are pushed into it.
  • heat exchanger 13 explained here can be adapted and used not only for natural gas liquefaction, but also for a variety of industrial applications with appropriate working media.
  • the cleaning device 10 and/or the cleaning element 12 can be adapted as less complex replacement parts to the needs of the respective areas of application and can be quickly replaced in the event of damage.
  • Figure 2 shows a cylinder tube of a heat exchanger 13, which is designed as a cooling coil 2, according to a preferred embodiment. It can be seen that the channel 23 is created by a corresponding cooling coil 2 on the outer surface of the cooling coil 2.
  • the inner surface or inner wall 2a of the hollow cylindrical cooling coil 2 has guide grooves 22. This at least one guide groove 22 serves to guide a cleaning element or scraper 12 and, according to this preferred embodiment, is coated with lubricant according to the invention, so that the cleaning element 12 can be moved through the cooling coil 2 or through the guide grooves 22 with as little friction as possible.
  • Figure 3 shows a cleaning element 12 according to a preferred embodiment, as it can be used in the heat exchanger 13. Shown are the outer grooves 122 of the cleaning element 12, which correspond to the guide grooves 22 of the cooling coil 2 and engage in them.
  • the internal thread 121 of the cleaning element 12 corresponds to the thread of the threaded spindle 3.
  • the cleaning element 12 has recesses or millings 123. As a result of the latter, the cleaning element 12 contains “teeth” or “claws” which prevent deposits from accumulating in the thread and leading to the cleaning element 12 becoming blocked. The deposits can enter the gap through the recesses or millings 123 and fall downwards towards the condensate reservoir when the heat exchanger 13 is in a vertical position.
  • the inner diameter of the scraper 12 which increases in the direction of movement of cleaning, serves to facilitate insertion into the contaminated threaded spindle at the start of the cleaning process.
  • the cleaning element 12 is provided with a surface coating which consists of a hydrogen-containing, amorphous carbon layer. Furthermore, the coating consists of hydrogen-free, amorphous carbon layers in which the sp 3 -hybridized carbon bond proportion is higher than in the hydrogen-containing coatings.
  • the surface coating can be limited to the outer surface and/or the outer grooves 122 and/or the internal thread 121 or can be formed on the entire cleaning element 12.
  • the surface coating can reduce the friction between the internal thread 121 and the threaded rod 3 and/or between the outer surface of the cleaning element and the inner wall 2a of the cooling coil 2.
  • the outer surface of the cleaning element 12 and/or the internal thread 121 can be provided with lubricant according to the invention in order to further reduce friction.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Combustion & Propulsion (AREA)
  • Thermal Sciences (AREA)
  • Organic Chemistry (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • General Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Lubricants (AREA)

Claims (10)

  1. Utilisation d'un lubrifiant, comprenant au moins 30 % de polytétrafluoroéthylène, au moins 0,5 % de graphite, et au moins 0,5 % de disulfure de molybdène, caractérisée en ce que le lubrifiant est utilisé à des températures entre 0K et 273K pour une réduction du frottement pour un dispositif de nettoyage (10) d'un échangeur de chaleur (13) servant au refroidissement et/ou à la liquéfaction de gaz.
  2. Utilisation d'un lubrifiant selon la revendication 1, caractérisée en ce que le lubrifiant comprend au plus 99 % de polytétrafluoroéthylène et/ou au plus 50 % de graphite et/ou au plus 50 % de disulfure de molybdène.
  3. Utilisation d'un lubrifiant selon la revendication 1 ou 2,
    caractérisée en ce que le lubrifiant comprend au moins 80 % et au plus 99 % de polytétrafluoroéthylène, et/ou dans laquelle le lubrifiant comprend au moins 0,5 % et au plus 2 % de graphite, et/ou dans laquelle le lubrifiant comprend au moins 0,5 % et au plus 2 % de disulfure de molybdène.
  4. Échangeur de chaleur (13) destiné à être utilisé à des températures entre 0K et 273K, présentant :
    - un tube cylindrique ;
    - un dispositif de nettoyage (10) comportant une broche filetée (3) s'étendant de manière coaxiale dans le premier tube cylindrique, dans lequel un élément de nettoyage (12) est monté sur la broche filetée (3) de telle sorte que par la rotation de la broche filetée (3), l'élément de nettoyage (12) peut être déplacé dans la direction axiale (100) le long de la broche filetée (3) dans le tube cylindrique ;
    caractérisé en ce qu'une première surface de contact entre l'élément de nettoyage (12) et une paroi interne (2a) du tube cylindrique et/ou une seconde surface de contact entre l'élément de nettoyage (12) et la broche filetée (3) sont au moins partiellement revêtues d'un lubrifiant utilisé selon l'une des revendications 1 à 3.
  5. Échangeur de chaleur (13) selon la revendication 4, dans lequel le tube cylindrique présente, sur la paroi interne (2a), au moins une fente de guidage (22) et dans lequel la première surface de contact est formée au moins partiellement par la fente de guidage (22).
  6. Échangeur de chaleur (13) selon la revendication 4 ou 5, dans lequel la broche filetée (3) présente un filetage externe et l'élément de nettoyage (12) présente un filetage interne (121), qui forment au moins partiellement la seconde surface de contact.
  7. Échangeur de chaleur (13) selon l'une des revendications 4 à 6, dans lequel une épaisseur de couche du lubrifiant sur la première surface de contact et/ou sur la seconde surface de contact est d'au moins 20 µm et d'au plus 200 µm, de préférence d'au moins 50 µm et d'au plus 100 µm.
  8. Échangeur de chaleur (13) selon l'une des revendications 4 à 7, dans lequel l'élément de nettoyage (12) présente au moins partiellement un revêtement de surface comprenant du carbone.
  9. Échangeur de chaleur (13) selon la revendication 8, dans lequel le revêtement de surface présente une couche de carbone amorphe contenant de l'hydrogène.
  10. Échangeur de chaleur (13) selon la revendication 8, dans lequel le revêtement de surface présente une couche de carbone amorphe dépourvue d'hydrogène qui est constituée de plus de 50 % de carbone hybridé en sp3.
EP19722793.7A 2018-05-09 2019-05-02 Utilisation d'un lubrifiant et échangeur de chaleur Active EP3790682B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP18020196.4A EP3566794A1 (fr) 2018-05-09 2018-05-09 Lubrifiant, utilisation d'un lubrifiant et échangeur thermique
PCT/EP2019/025133 WO2019214848A1 (fr) 2018-05-09 2019-05-02 Lubrifiant, utilisation d'un lubrifiant et échangeur de chaleur

Publications (3)

Publication Number Publication Date
EP3790682A1 EP3790682A1 (fr) 2021-03-17
EP3790682B1 true EP3790682B1 (fr) 2023-09-20
EP3790682C0 EP3790682C0 (fr) 2023-09-20

Family

ID=62167090

Family Applications (2)

Application Number Title Priority Date Filing Date
EP18020196.4A Withdrawn EP3566794A1 (fr) 2018-05-09 2018-05-09 Lubrifiant, utilisation d'un lubrifiant et échangeur thermique
EP19722793.7A Active EP3790682B1 (fr) 2018-05-09 2019-05-02 Utilisation d'un lubrifiant et échangeur de chaleur

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP18020196.4A Withdrawn EP3566794A1 (fr) 2018-05-09 2018-05-09 Lubrifiant, utilisation d'un lubrifiant et échangeur thermique

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EP (2) EP3566794A1 (fr)
WO (1) WO2019214848A1 (fr)

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5670461A (en) * 1994-08-19 1997-09-23 Gkn Automotive Ag High temperature lubricating grease containing urea compounds
JP2007262368A (ja) * 2006-03-30 2007-10-11 Jfe Steel Kk 溶接ワイヤ伸線用固体潤滑剤及びフラックス入りワイヤ
US20080073063A1 (en) * 2006-06-23 2008-03-27 Exxonmobil Research And Engineering Company Reduction of fouling in heat exchangers
CN101501437A (zh) * 2006-06-23 2009-08-05 埃克森美孚研究工程公司 减少热交换器中的结垢
JP4921894B2 (ja) * 2006-08-30 2012-04-25 住鉱潤滑剤株式会社 複層潤滑被膜用組成物と複層潤滑被膜及び該被膜を有するピストン
JP5178698B2 (ja) * 2009-12-18 2013-04-10 大同メタル工業株式会社 摺動用樹脂組成物
JP5546485B2 (ja) * 2011-03-22 2014-07-09 大同メタル工業株式会社 摺動用樹脂組成物
DE102015010455A1 (de) 2015-08-11 2017-02-16 Linde Aktiengesellschaft Wärmetauscher

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Publication number Publication date
EP3566794A1 (fr) 2019-11-13
EP3790682C0 (fr) 2023-09-20
EP3790682A1 (fr) 2021-03-17
WO2019214848A1 (fr) 2019-11-14

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