DE3905395A1 - Apparatus for protecting structural components from corrosion in flue-desulphurisation plants - Google Patents
Apparatus for protecting structural components from corrosion in flue-desulphurisation plantsInfo
- Publication number
- DE3905395A1 DE3905395A1 DE3905395A DE3905395A DE3905395A1 DE 3905395 A1 DE3905395 A1 DE 3905395A1 DE 3905395 A DE3905395 A DE 3905395A DE 3905395 A DE3905395 A DE 3905395A DE 3905395 A1 DE3905395 A1 DE 3905395A1
- Authority
- DE
- Germany
- Prior art keywords
- polymer
- indicates
- corrosion
- composite system
- layers
- 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.)
- Withdrawn
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B25/00—Layered products comprising a layer of natural or synthetic rubber
- B32B25/04—Layered products comprising a layer of natural or synthetic rubber comprising rubber as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B25/08—Layered products comprising a layer of natural or synthetic rubber comprising rubber as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
- B32B27/304—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising vinyl halide (co)polymers, e.g. PVC, PVDC, PVF, PVDF
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
- B32B27/322—Layered products comprising a layer of synthetic resin comprising polyolefins comprising halogenated polyolefins, e.g. PTFE
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/34—Layered products comprising a layer of synthetic resin comprising polyamides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B38/00—Ancillary operations in connection with laminating processes
- B32B2038/0052—Other operations not otherwise provided for
- B32B2038/0076—Curing, vulcanising, cross-linking
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/714—Inert, i.e. inert to chemical degradation, corrosion
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2319/00—Synthetic rubber
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2323/00—Polyalkenes
- B32B2323/04—Polyethylene
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2323/00—Polyalkenes
- B32B2323/10—Polypropylene
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2327/00—Polyvinylhalogenides
- B32B2327/06—PVC, i.e. polyvinylchloride
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2327/00—Polyvinylhalogenides
- B32B2327/12—Polyvinylhalogenides containing fluorine
- B32B2327/18—PTFE, i.e. polytetrafluoroethylene
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2377/00—Polyamides
Landscapes
- Laminated Bodies (AREA)
Abstract
Description
Es ist bekannt, daß in naß arbeitenden Rauchgasent schwefelungsanlagen (REA) die Bauteile gegen die korrosive Belastung geschützt werden müssen. Aus Kostengründen werden die Hauptkomponenten wie Absorber, Rauchgaskanäle und Rohrleitungen aus Kohlenstoffstahl hergestellt. In den REA werden die Säurebildner Schwefeldioxid, Schwefeltrioxid, Chlorid und Fluorid aus den Abgasen meist mittels calciumhaltiger Suspensionen entfernt, daneben sind auch Verfahren bekannt, welche Ammonium-, Natrium- und/oder Magnesium-Ionen verwenden.It is known that in smoke flue gas working sulfur plants (REA) the components against the corrosive Load must be protected. For cost reasons become the main components such as absorbers, flue gas ducts and pipes made of carbon steel. In the REA, the acidifiers are sulfur dioxide, Sulfur trioxide, chloride and fluoride from the exhaust gases mostly removed with calcium-containing suspensions, processes are also known which use ammonium, Use sodium and / or magnesium ions.
Die Bauteile der REA aus Kohlenstoffstahl müssen vor Roh-und Reingasen sowie wäßrigen Suspensionen, welche die oben genannten Ionen oder ihre Reaktionsprodukte enthalten, zuverlässig geschützt werden.The components of the carbon steel REA must be Raw and pure gases as well as aqueous suspensions, which the above ions or their reaction products included, reliably protected.
Der Korrosionsschutz erfolgt nach dem Stand der Technik durch Beschichtung mit Kunstharzen, denen Glasfasern oder Glasflocken zugemischt werden oder durch Auskleiden mit Elastomeren oder durch Auskleiden mit hochlegierten Stählen oder Nickelbasislegierungen, welche durch Plattierung oder Schweißen angebracht werden. Insbesondere in REA, welche bei Temperaturen von 338 bis 345 K arbeiten, sind Schäden an Beschichtungen und Auskleidungen aus Kautschuk aufgetreten, die durch Diffusion von Wasser und säurebildenden Ionen durch die Beschichtung oder Auskleidung zum Grundwerkstoff Stahl ausgelöst wurden. Corrosion protection takes place according to the state of the art by coating with synthetic resins, which are glass fibers or Glass flakes can be added or by lining with elastomers or by lining with high-alloy Steels or nickel-based alloys, which by Plating or welding can be applied. Especially in REA, which at temperatures from 338 to 345 K, damage to coatings and Rubber linings occurred through Diffusion of water and acid-forming ions through the coating or lining to the base material Steel were triggered.
Die Auskleidung mit hochlegierten Stählen oder Nickel basislegierungen ist aufgrund der Materialkosten und der aufwendigen Verarbeitung sehr teuer. Unter Ablagerungen und Anbackungen kommt es zur Aufkonzentrierung von Ionen und zur Spaltkorrosion. Die Ablagerung von Flugrost partikeln auf Edelstahl führt zur Kontaktkorrosion, sodaß selbst der Einsatz von sehr kostspieligen Korrosions schutzsystemen versagen kann.The lining with high-alloy steels or nickel base alloys is due to the material cost and the complex processing very expensive. Under deposits and caking, ions are concentrated and crevice corrosion. The deposit of rust film Particles on stainless steel lead to contact corrosion, so even the use of very expensive corrosion protection systems can fail.
Die erfindungsgemäße Aufgabe besteht in der Schaffung einer Vorrichtung, welche die Diffusion von Wasser und Säurebildnern durch das Beschichtungssystem zum Grund werkstoff unterbindet. Diese Aufgabe wird gelöst durch Zusammenfügen von Polymerfolien, welche aufgrund ihrer chemischen Eigenschaften und/oder Dicke einen ausreichend hohen Diffusionswiderstand aufweisen mit leicht zu ver arbeitenden Elastomerfolien. Die Elastomere gleichen dabei Unebenheiten des Grundwerkstoffes aus und nehmen durch elastische Verformung die bei Temperaturänderungen infolge unterschiedlicher Wärmeausdehnung von Grundwerkstoff und Polymerfolie induzierten Spannungen auf. So wird ein Auskleidungsmaterial geschaffen, welches den chemischen, thermischen und mechanischen Belastungen in einer REA mit ausreichender Sicherheit angepaßt werden kann. Das Zusammenfügen kann in bekannter Weise durch Kleben, Schweißen oder Vulkanisieren erfolgen, wobei die einzelnen Werkstoffe durch geeignete Vorbehandlung wie Anlösen, Anquellen, Beizen, Aufrauhen, Flammbehandlung oder Abfunken durch elektrische Entladung vorbereitet werden. Das Zusammenfügen kann durch bekannte Maßnahmen wie Druck- und/oder Temperaturerhöhung sowie durch Einsatz von Dampf gefördert werden. Zur Einstellung des Diffusions widerstandes des erfindungsgemäßen Korrosionsschutz systems kann die Zahl der zusammengefügten Folien sowie ihre Reihenfolge, Materialzusammensetzung und Schicht dicke variiert werden. Zur Erleichterung bei der Montage und bei Umbauten oder Reparaturen kann eine selbst klebende Schicht aufgetragen sein. The object of the invention is to create a device which allows the diffusion of water and Acid builders through the coating system to the bottom prevents material. This task is solved by Assembly of polymer films, which due to their chemical properties and / or thickness is sufficient have high diffusion resistance with easy to ver working elastomer films. The elastomers are the same Unevenness of the base material and take through elastic deformation caused by temperature changes different thermal expansion of base material and polymer film induced voltages. So will created a lining material that thermal and mechanical loads in a REA can be adapted with sufficient certainty. The assembly can be done in a known manner by gluing, Welding or vulcanizing take place, the individual Materials by suitable pretreatment such as dissolving, Swelling, pickling, roughening, flame treatment or Sparking can be prepared by electrical discharge. The assembly can be done by known measures such as Pressure and / or temperature increase and through use be promoted by steam. To adjust the diffusion resistance of the corrosion protection according to the invention systems can count the number of foils put together as well their order, material composition and layer thickness can be varied. For ease of assembly and in the case of conversions or repairs one can do it himself adhesive layer can be applied.
Die Fig. A stellt ein Korrosionsschutzsystem dar, in dem eine Polymerfolie 2 mit einer Schleißschicht aus einem Elastomer 1 und einer Trägerschicht aus einem Elastomer 4 , welches mit einer klebenden Schicht 6 ausgerüstet ist, zusammengefügt wurde. Fig. A presents a corrosion protection system is, in which a polymer film 2 with a Schleißschicht of an elastomer 1 and a backing layer of an elastomer 4, which is equipped with an adhesive layer 6, was assembled.
Die Fig. B stellt ein Korrosionsschutzsystem dar, welches aus einem Elastomer 1 als Schleißschicht und der leicht zu verklebenden Polymerfolie 2 und dem schwierig mit Elastomeren zusammenzufügenden Polymer 3, welches einen sehr hohen Diffusionswiderstand aufweist, und dem Elastomer 4 besteht. Die klebende Schicht ist mit 6 bezeichnet. Fig. B illustrates a corrosion protection system, which consists of an elastomer 1 as Schleißschicht and easy to be bonded polymer film 2 and the difficult mating with elastomers Polymer 3, which has a very high diffusion resistance, and the elastomer 4 is composed. The adhesive layer is labeled 6 .
Die Fig. C stellt ein Korrosionsschutzsystem dar, bei dem ein Polymer 3 mit einem anderen Polymer 2 zusammengefügt und anschließend mit den Elastomeren 4 und 5 verbunden wurden, wobei das Elastomer 5 mit einer Klebeschicht 6 versehen wird. FIG. C shows a corrosion protection system in which a polymer 3 has been joined with another polymer 2 and then connected with the elastomers 4 and 5 , the elastomer 5 being provided with an adhesive layer 6 .
Die Fig. D stellt ein Korrosionsschutzsystem dar, bei dem ein Elastomer 1 als Schleißschicht mit einem Polymer 2 und 3 sowie einem weiteren Elastomer 4 ver bunden wurde. Die Polymerfolie 3 trägt in diesem Beispiel die Klebeschicht 6. Fig. D represents a corrosion protection system in which an elastomer 1 as a wear layer with a polymer 2 and 3 and a further elastomer 4 was a related party. In this example, the polymer film 3 carries the adhesive layer 6 .
1 Schleißschicht aus Elastomer
2, 3 Polymere mit verschiedenen Eigenschaften
4, 5 Elastomere mit verschiedenen Eigenschaften
6 Klebeschicht 1 wear layer made of elastomer
2, 3 polymers with different properties
4, 5 elastomers with different properties
6 adhesive layer
Claims (15)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3905395A DE3905395A1 (en) | 1989-02-22 | 1989-02-22 | Apparatus for protecting structural components from corrosion in flue-desulphurisation plants |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3905395A DE3905395A1 (en) | 1989-02-22 | 1989-02-22 | Apparatus for protecting structural components from corrosion in flue-desulphurisation plants |
Publications (1)
Publication Number | Publication Date |
---|---|
DE3905395A1 true DE3905395A1 (en) | 1990-08-30 |
Family
ID=6374647
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE3905395A Withdrawn DE3905395A1 (en) | 1989-02-22 | 1989-02-22 | Apparatus for protecting structural components from corrosion in flue-desulphurisation plants |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE3905395A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0658417A2 (en) * | 1993-12-19 | 1995-06-21 | Keramchemie GmbH | Method for corrosion resistant lining of a metal article |
EP0811415A2 (en) * | 1996-06-04 | 1997-12-10 | Mitsubishi Heavy Industries, Ltd. | Gas-liquid contact apparatus |
EP0770471A3 (en) * | 1995-10-27 | 1998-02-11 | Keramchemie GmbH | Corrosion-resistant metallic construction element |
-
1989
- 1989-02-22 DE DE3905395A patent/DE3905395A1/en not_active Withdrawn
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0658417A2 (en) * | 1993-12-19 | 1995-06-21 | Keramchemie GmbH | Method for corrosion resistant lining of a metal article |
EP0658417A3 (en) * | 1993-12-19 | 1996-01-24 | Gewerk Keramchemie | Method for corrosion resistant lining of a metal article. |
EP0770471A3 (en) * | 1995-10-27 | 1998-02-11 | Keramchemie GmbH | Corrosion-resistant metallic construction element |
EP0811415A2 (en) * | 1996-06-04 | 1997-12-10 | Mitsubishi Heavy Industries, Ltd. | Gas-liquid contact apparatus |
EP0811415A3 (en) * | 1996-06-04 | 1998-07-22 | Mitsubishi Heavy Industries, Ltd. | Gas-liquid contact apparatus |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8139 | Disposal/non-payment of the annual fee |