EP1129789B1 - Oberflächenschutz der Wasserseiteoberfläche von Wärmeaustauscher von Heizkesseln und Gaswasserheizern - Google Patents

Oberflächenschutz der Wasserseiteoberfläche von Wärmeaustauscher von Heizkesseln und Gaswasserheizern Download PDF

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Publication number
EP1129789B1
EP1129789B1 EP00200746A EP00200746A EP1129789B1 EP 1129789 B1 EP1129789 B1 EP 1129789B1 EP 00200746 A EP00200746 A EP 00200746A EP 00200746 A EP00200746 A EP 00200746A EP 1129789 B1 EP1129789 B1 EP 1129789B1
Authority
EP
European Patent Office
Prior art keywords
water
limestone
circuit
exchangers
copper
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.)
Expired - Lifetime
Application number
EP00200746A
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English (en)
French (fr)
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EP1129789A1 (de
Inventor
Giorgio Ing. Pastorino
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.)
Riello SpA
Original Assignee
Riello SpA
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 Riello SpA filed Critical Riello SpA
Priority to DE60028922T priority Critical patent/DE60028922T2/de
Priority to AT00200746T priority patent/ATE330715T1/de
Priority to EP00200746A priority patent/EP1129789B1/de
Priority to ES00200746T priority patent/ES2265862T3/es
Priority to CN01111245.XA priority patent/CN1200778C/zh
Publication of EP1129789A1 publication Critical patent/EP1129789A1/de
Application granted granted Critical
Publication of EP1129789B1 publication Critical patent/EP1129789B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/14—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
    • B05D5/08—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain an anti-friction or anti-adhesive surface
    • B05D5/083—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain an anti-friction or anti-adhesive surface involving the use of fluoropolymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/22—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to internal surfaces, e.g. of tubes
    • 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
    • F28F19/04—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers by using coatings, e.g. vitreous or enamel coatings of rubber; of plastics material; of varnish

Definitions

  • the precipitation of limestone is more significant, the higher is the water limestone contents (hardness of water), the higher is the water heating and the longer is the time water remains at high temperature.
  • the exchangers intended for the production of sanitary hot water shall keep drinkable the sanitary water produced according to WRC standards.
  • the metals used for exchangers are, according to the type:
  • the water-diluted product has a viscosity comparable to water viscosity and is such as to fill all the interstices of the exchangers.
  • JP 61-149 794 discloses a method wherein scale deposits are prevented by coating the inner surface of an heat exchanger with a layer containing a fluorosilicon resin, which is circulated in a freon solution; this method therefore requires use of a freon-diluted resin, which is complicated to be used.
  • the resin coating treatment is performed as it is shown in the diagram of Fig. 5.
  • the water-diluted product has a viscosity comparable to water viscosity and such as to fill all the interstices of the exchangers.
  • the surface protection from such resins reduces the migration of metallic ions in water, the corrosion of the same metals and assures a higher water sanitation coming into contact with the water-side surfaces.
  • a calcium bicarbonate solution has been prepared. This is more soluble in water than the calcium carbonate (limestone) that tends to form and deposit at temperatures higher than 50°C.
  • the treated/untreated specimen have been plunged into these boiling solutions for 3 hours. At the end of this time, the limestone deposit on all specimen was recorded; on specimen treated with Silane, however, the amount of the deposit was the lowest (also on phosphate a certain effect was noted).
  • the measurements of static contact angle versus water after limestone deposition under the described conditions are recorded (table 2 shown in Fig. 7).
  • Test specimen have been washed under a stream of cold tap-water for few seconds; after this time specimen have been stove-dried for 15 minutes and then the static contact angle versus water was measured again (table 3 shown in Fig. 8).

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Paints Or Removers (AREA)
  • Details Of Fluid Heaters (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Claims (4)

  1. Verfahren zum Verhindern der Ablagerung von Kalk und dem Absetzen von Rest-Verarbeitungsprodukten oder anderen Fremdkörpern an inneren Oberflächen von Heizkreisläufen, die aus Kupfer, Edelstahl oder Aluminium erzeugte metallische Oberflächen aufweisen, umfassend die Schritte:
    - Lösen eines fluorierten Silanharzes, das mit funktionellen Gruppen versehen ist, um ein gelöstes Produkt herzustellen;
    - Befüllen des zu bearbeitenden Kreislaufs mit dem gelösten Produkt;
    - Leeren des Kreislaufs;
    wobei das Verfahren dadurch gekennzeichnet ist, dass das Harz in Wasser gelöst wird, wodurch ein wassergelöstes Produkt ausgebildet wird, das eine Viskosität aufweist, die mit der des Wassers vergleichbar ist, und dass die funktionellen Gruppen des Harzes funktionelle Gruppen sind, die an den aus Kupfer, Edelstahl oder Aluminium erzeugten metallischen Oberflächen anhaften.
  2. Verfahren wie in Anspruch 1, dadurch gekennzeichnet, dass das Harz ein fluorierter Silanharz ist, das mit Perfluorpolyether-Gruppen versehen ist.
  3. Verfahren wie in Anspruch 1 oder 2, dadurch gekennzeichnet, dass der Schritt des Leerens des Kreislaufs durch Einströmen komprimierter Luft in den Kreislauf durchgeführt wird.
  4. Verfahren wie in einem der voranstehenden Ansprüche, dadurch gekennzeichnet, dass es nach dem Schritt des Leerens des Kreislaufs den Schritt des Erwärmens des Kreislaufs in einem Ofen umfasst.
EP00200746A 2000-03-03 2000-03-03 Oberflächenschutz der Wasserseiteoberfläche von Wärmeaustauscher von Heizkesseln und Gaswasserheizern Expired - Lifetime EP1129789B1 (de)

Priority Applications (5)

Application Number Priority Date Filing Date Title
DE60028922T DE60028922T2 (de) 2000-03-03 2000-03-03 Oberflächenschutz der Wasserseiteoberfläche von Wärmeaustauscher von Heizkesseln und Gaswasserheizern
AT00200746T ATE330715T1 (de) 2000-03-03 2000-03-03 Oberflächenschutz der wasserseiteoberfläche von wärmeaustauscher von heizkesseln und gaswasserheizern
EP00200746A EP1129789B1 (de) 2000-03-03 2000-03-03 Oberflächenschutz der Wasserseiteoberfläche von Wärmeaustauscher von Heizkesseln und Gaswasserheizern
ES00200746T ES2265862T3 (es) 2000-03-03 2000-03-03 Proteccion de superficies interiores del circuito de agua de intercambiadores de calor utilizados en calderas y en calentadores de agua a gas.
CN01111245.XA CN1200778C (zh) 2000-03-03 2001-03-05 热交换器和防止在加热回路中发生积垢的方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP00200746A EP1129789B1 (de) 2000-03-03 2000-03-03 Oberflächenschutz der Wasserseiteoberfläche von Wärmeaustauscher von Heizkesseln und Gaswasserheizern

Publications (2)

Publication Number Publication Date
EP1129789A1 EP1129789A1 (de) 2001-09-05
EP1129789B1 true EP1129789B1 (de) 2006-06-21

Family

ID=8171136

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00200746A Expired - Lifetime EP1129789B1 (de) 2000-03-03 2000-03-03 Oberflächenschutz der Wasserseiteoberfläche von Wärmeaustauscher von Heizkesseln und Gaswasserheizern

Country Status (5)

Country Link
EP (1) EP1129789B1 (de)
CN (1) CN1200778C (de)
AT (1) ATE330715T1 (de)
DE (1) DE60028922T2 (de)
ES (1) ES2265862T3 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK178553B1 (en) 2014-04-25 2016-06-13 Teknologisk Inst Temperature fluctuation and temperature gradient resistant coating composition having also corrosion inhibiting properties, method for making the coating and use thereof

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3891496A (en) * 1972-11-14 1975-06-24 Austral Erwin Engineering Co Method of heat exchange and evaporation
US4125152A (en) * 1977-09-19 1978-11-14 Borg-Warner Corporation Scale resistant heat transfer surfaces and a method for their preparation
FR2476145A1 (fr) * 1980-02-15 1981-08-21 Crans Forges Procede de protection contre la corrosion de la paroi interne de circuits tubulaires integres
US4344993A (en) * 1980-09-02 1982-08-17 The Dow Chemical Company Perfluorocarbon-polymeric coatings having low critical surface tensions
GB2084486B (en) * 1980-09-29 1984-06-13 Borg Warner Heat transfer surfaces having scale resistant fluorocarbon polymer coatings thereon
US4588643A (en) * 1983-03-18 1986-05-13 The Dow Chemical Company Perfluorocarbon polymeric coatings having low critical surface tensions
US4503099A (en) * 1983-06-15 1985-03-05 Borg-Warner Corporation Heat transfer surfaces having scale resistant polymer coatings thereon
JPS61149794A (ja) * 1984-12-24 1986-07-08 Nissan Motor Co Ltd 内面処理された熱交換器
SE468159B (sv) * 1991-03-25 1992-11-16 Alfa Laval Thermal Ab Foerfarande foer att belaegga vaermeoeverfoeringsplattor i en plattvaermevaexlare med ett skikt av ytskyddande material
JPH07225094A (ja) * 1994-02-10 1995-08-22 Oomiya Kasei Kk 浸漬型熱交換器
WO1996021836A1 (en) * 1995-01-12 1996-07-18 The Dow Chemical Company Heat exchanger having enhanced heat transfer capability

Also Published As

Publication number Publication date
CN1200778C (zh) 2005-05-11
CN1348089A (zh) 2002-05-08
ES2265862T3 (es) 2007-03-01
DE60028922D1 (de) 2006-08-03
EP1129789A1 (de) 2001-09-05
DE60028922T2 (de) 2007-03-01
ATE330715T1 (de) 2006-07-15

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