DE1293521B - Process for the temperature control of phosphating baths using plate heat exchangers - Google Patents
Process for the temperature control of phosphating baths using plate heat exchangersInfo
- Publication number
- DE1293521B DE1293521B DE1965B0083054 DEB0083054A DE1293521B DE 1293521 B DE1293521 B DE 1293521B DE 1965B0083054 DE1965B0083054 DE 1965B0083054 DE B0083054 A DEB0083054 A DE B0083054A DE 1293521 B DE1293521 B DE 1293521B
- Authority
- DE
- Germany
- Prior art keywords
- plate heat
- temperature control
- phosphating
- heat exchangers
- heating
- 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.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/01—Control of temperature without auxiliary power
- G05D23/13—Control of temperature without auxiliary power by varying the mixing ratio of two fluids having different temperatures
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/73—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals characterised by the process
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D21/00—Processes for servicing or operating cells for electrolytic coating
- C25D21/02—Heating or cooling
-
- 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
- F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Thermal Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Electrochemistry (AREA)
- Chemically Coating (AREA)
- Chemical Treatment Of Metals (AREA)
Description
Bei der chemischen Oberflächenbehandlung von Metallteilen mit Phosphatierungslösungen zu dem Zwecke, die Oberfläche für Farb- und Lackanstriche oder für Schmiermittel besonders haftfähig zu machen, kommen Tauchbäder zum Einsatz, -die erwärmt werden müssen. Diese Bäder für das als Phosphatieren bezeichnete Verfahren wurden bisher mit eingesetzten Heizschlangen bzw. Heizsystemen temperiert. Der Nachteil einer solchen Temperiermethode besteht darin, daß auf der Badflüssigkeitsseite nur eine geringe Flüssigkeitsgeschwindigkeit vorhanden ist, die nur eine schlechte Wärmeübertragung ermöglicht.In the chemical surface treatment of metal parts with phosphating solutions for the purpose of the surface for paint and varnish coatings or for lubricants To make them particularly adhesive, immersion baths are used that are heated have to. These baths for the process known as phosphating have been used so far tempered with inserted heating coils or heating systems. The disadvantage of one Such tempering method is that on the bath liquid side only one low liquid velocity is present, which only has poor heat transfer enables.
Außerdem hat bei Verwendung von eingebauten Heizschlangen die geringe Geschwindigkeit der Badflüssigkeit den Nachteil, daß bei der hohen Temperaturdifferenz die im Bad enthaltenen Phosphatiersalze zur Auskristallisation gelangen, was wiederum zur Verkrustung der Heizflächen und Verminderung des Wärmedurchgangs führt.In addition, when using built-in heating coils, the low Speed of the bath liquid has the disadvantage that at the high temperature difference the phosphating salts contained in the bath crystallize out, which in turn leads to encrustation of the heating surfaces and a reduction in heat transfer.
Wichtig ist daher bei der Temperierung der Bäder die Einhaltung einer gleichbleibenden, niedrigen Temperaturdifferenz, unabhängig von der Temperatur des Phosphatierbades. Dies wird erreicht durch eine im Gegenstrom durchgeführte indirekte Erwärmung mit hoher Durchflußgeschwindigkeit beider Medien - der Phosphatierflüssigkeit und der Heizflüssigkeit - in dem Erwärmungsaggregat. Hier sind wärmewirtschaftlich vorteilhaft die Plattenwärmeaustauscher einzusetzen, dier erlauben, erfindungsgemäß das Heizverfahren aus dem eigentlichen Umlaufsystem der Badflüssigkeit herauszuziehen.It is therefore important to comply with a temperature control in the baths constant, low temperature difference, regardless of the temperature of the Phosphating bath. This is achieved through an indirect countercurrent Heating with a high flow rate of both media - the phosphating liquid and the heating fluid - in the heating unit. Here are thermal economics advantageously to use the plate heat exchangers, which allow according to the invention pulling the heating process out of the actual bath fluid circulation system.
Nachfolgend wird der Einsatz des Plattenwärmeaustauschers in Verbindung mit einer Phosphatieranlage beschrieben, bei der die Phosphatierflüssigkeit im Gegenstrom zu dem Heizmittel geführt wird und bei der der Plattenwärmeaustauscher unabhängig von der Phosphatieranlage - also auch örtlich getrennt - installiert sein und je nach Bedarf erweitert oder umgeschaltet werden kann. Umschalten bedeutet ein Zu- oder Abschalten von mehreren parallelgeschalteten Gruppen eines aus einer bestimmten Gesamtzahl von Platten bestehenden Wärmeaustauschers, bei der die Gruppen wiederum eine bestimmte Plattenanzahl aufweisen. Bei der Umschaltung soll die nur bei dem Plattenwärmeaustauscher vorhandene Möglichkeit genutzt werden, im Hinblick auf die nur begrenzte Druckaufnahme die Durchflußgeschwindigkeit beider Flüssigkeiten zur Erreichung einer kleinen Temperaturdifferenz auf ein Höchstmaß zu steigern, damit bei günstiger Wärmeübertragung die Phosphatierflüssigkeit keine Gelegenheit hat, im Zuge der Erwärmung an den Heizflächen auszukristallisieren, was im weiteren Verlauf auch zur Schlammabsetzung führen würde. So kann z. B. zur Temperierung eines Phosphatierungsbades auf eine Temperatur von 70° C eine Heizflüssigkeit im Plattenwärmeaustauscher mit einer Temperatur von 80° C verwendet werden.In the following the use of the plate heat exchanger is related described with a phosphating system, in which the phosphating liquid in countercurrent to the heating means and in which the plate heat exchanger is independent from the phosphating plant - also locally separated - installed and ever can be expanded or switched as required. Switching means a or disconnection of several groups connected in parallel, one from a specific one Total number of plates in existing heat exchanger in which the groups turn have a certain number of plates. When switching over, it should only be used with the Plate heat exchangers can be used in terms of the existing possibility only limited pressure uptake the flow rate of both liquids to Achieving a small temperature difference to increase it to a maximum if the heat transfer is favorable, the phosphating liquid has no opportunity to crystallize out in the course of the heating on the heating surfaces, which in the further course would also lead to sludge settling. So z. B. to control the temperature of a phosphating bath to a temperature of 70 ° C with a heating fluid in the plate heat exchanger at a temperature of 80 ° C.
Claims (1)
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1965B0083054 DE1293521B (en) | 1965-07-30 | 1965-07-30 | Process for the temperature control of phosphating baths using plate heat exchangers |
FR71471A FR1510848A (en) | 1965-07-30 | 1966-07-29 | Method for adjusting the temperature of galvanic treatment baths and other surface treatment baths, in particular bonding baths, and device for carrying out this process |
BE684862D BE684862A (en) | 1965-07-30 | 1966-07-29 | |
GB3444266A GB1121983A (en) | 1965-07-30 | 1966-08-01 | Method of controlling the temperature of galvanic and other surface treatment baths, and apparatus for carrying out the method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1965B0083054 DE1293521B (en) | 1965-07-30 | 1965-07-30 | Process for the temperature control of phosphating baths using plate heat exchangers |
Publications (1)
Publication Number | Publication Date |
---|---|
DE1293521B true DE1293521B (en) | 1969-04-24 |
Family
ID=6981783
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE1965B0083054 Pending DE1293521B (en) | 1965-07-30 | 1965-07-30 | Process for the temperature control of phosphating baths using plate heat exchangers |
Country Status (4)
Country | Link |
---|---|
BE (1) | BE684862A (en) |
DE (1) | DE1293521B (en) |
FR (1) | FR1510848A (en) |
GB (1) | GB1121983A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1997037189A1 (en) * | 1996-04-03 | 1997-10-09 | Cabot Corporation | Improved heat exchanger |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ITMI20100179A1 (en) * | 2010-02-05 | 2011-08-06 | Delmet S R L | METAL PROCESSING EQUIPMENT BY DIVING IN A PROCESS BATH |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE833750C (en) * | 1948-10-02 | 1952-03-13 | Rheinische Roehrenwerke A G | Device for heating pickling baths or other baths |
-
1965
- 1965-07-30 DE DE1965B0083054 patent/DE1293521B/en active Pending
-
1966
- 1966-07-29 BE BE684862D patent/BE684862A/xx unknown
- 1966-07-29 FR FR71471A patent/FR1510848A/en not_active Expired
- 1966-08-01 GB GB3444266A patent/GB1121983A/en not_active Expired
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE833750C (en) * | 1948-10-02 | 1952-03-13 | Rheinische Roehrenwerke A G | Device for heating pickling baths or other baths |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1997037189A1 (en) * | 1996-04-03 | 1997-10-09 | Cabot Corporation | Improved heat exchanger |
US7328738B2 (en) | 1996-04-03 | 2008-02-12 | Cabot Corporation | Heat exchanger |
Also Published As
Publication number | Publication date |
---|---|
BE684862A (en) | 1967-01-03 |
GB1121983A (en) | 1968-07-31 |
FR1510848A (en) | 1968-01-26 |
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