DE1941387A1 - Tube heat exchanger with impermeable - graphite floor - Google Patents
Tube heat exchanger with impermeable - graphite floorInfo
- Publication number
- DE1941387A1 DE1941387A1 DE19691941387 DE1941387A DE1941387A1 DE 1941387 A1 DE1941387 A1 DE 1941387A1 DE 19691941387 DE19691941387 DE 19691941387 DE 1941387 A DE1941387 A DE 1941387A DE 1941387 A1 DE1941387 A1 DE 1941387A1
- Authority
- DE
- Germany
- Prior art keywords
- graphite
- impermeable
- heat exchanger
- synthetic resin
- tube bundle
- 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
- 229910002804 graphite Inorganic materials 0.000 title claims abstract description 30
- 239000010439 graphite Substances 0.000 title claims abstract description 30
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 38
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 7
- 229920003002 synthetic resin Polymers 0.000 claims description 9
- 239000000057 synthetic resin Substances 0.000 claims description 9
- 239000011888 foil Substances 0.000 claims description 5
- 239000004744 fabric Substances 0.000 claims description 4
- 239000000835 fiber Substances 0.000 claims description 4
- 239000011148 porous material Substances 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 3
- 238000005470 impregnation Methods 0.000 description 3
- 230000035699 permeability Effects 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 229920001568 phenolic resin Polymers 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- 210000002268 wool Anatomy 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
- F28F21/02—Constructions of heat-exchange apparatus characterised by the selection of particular materials of carbon, e.g. graphite
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Laminated Bodies (AREA)
Abstract
Description
Boden für Rohrbündebvärmetauscher Gegenstand der Erfindung ist ein impermeabeler Boden für Rohrbündelwärmetauscher aus Graphit. Zur Verkleinerung der stoffbedingten Permeabilität von Wärmetauschern und anderen Apparat,eteilen aus Graphit sind Imprägnierverfahren bekanntgeworden, bei denen die Poren der bearbeiteten oder unbearbeiteten Graphitkörper mit vorzugsweise thermisch härtbaren Kunstharzen gefüllt werden. Die Imprägnierung kann mehrmals wiederholt werden, wobei das aufgenommene Kunstharz nach jeder linprägnierstufe durch Erwärmen des Graphitkörpers ausgehärtet wird.The subject of the invention is a bottom for shell-and-tube heat exchangers impermeable bottom for tube bundle heat exchangers made of graphite. To shrink the substance-related permeability of heat exchangers and other apparatus Graphite impregnation processes have become known in which the pores of the machined or unprocessed graphite body with preferably thermally curable synthetic resins be filled. The impregnation can be repeated several times, with the recorded Synthetic resin hardened after each impregnation stage by heating the graphite body will.
Ein Nachteil der kunstharzimprägnierten Graphitkörper ist, daß das Kunstharz in den Poren des Graphitkörpers nachhärtet, wenn der Graphitkörper längere Zeit höheren Temperaturen,z. B. 150 bis 2000C,ausgesetzt wird. Dabei schwindet das Imprägnierharz und löst sich von den Porenwändcn, wodurch mehr oder weniger breite Spalten entstehen.'Die Stärke der Spalten ist umso größer, je größer der Porendurchmesser ist, da der Gesamtschwund des Kunstharz dem Porendurchmesser proportional ist. Großformatige Graphitkörper, wie z. B. Wärmetauscherböden sind herstellung.sbedingt grobporig und werden bei höheren Verwendungsteinperaturen wegen der Bildung größerer Spalten undicht.A disadvantage of the synthetic resin-impregnated graphite body is that the Synthetic resin in the pores of the graphite body after-hardens when the graphite body is longer Time higher temperatures, e.g. B. 150 to 2000C, is exposed. This disappears Impregnating resin and loosens from the pore walls, creating more or less wide Gaps arise. 'The thickness of the gaps is greater, the larger the pore diameter because the total shrinkage of the synthetic resin is proportional to the pore diameter. Large format Graphite bodies, such as. B. Heat exchanger bottoms are due to the production process coarse-pored and are used at higher stone temperatures because of the formation of larger gaps leaky.
D3r Austausch von undichten Wärmetauscherböden verursacht Produktionsstörungen und teilweise ebenfalls größere Betriebsmlttelverluste.The replacement of leaky heat exchanger floors causes production disruptions and in some cases also greater operating fluid losses.
Es wurde gefunden, daß Böden für Rohrbündelwärmetauscher aus Graphit, die dadurch gekennzeichnet sind, daß die Böden aus mindestens zwei Teilen zusammengesetzt sind, zwischen die undurchlässige kohlenstoffhaltige Schichten geklebt sind, diesen Nachteil nicht aufweisen. Die undurchlässigen kohlenstoffhaltigen Schichten bestehen .vorteilhaft aus einer oder mehreren Graphitfolien mit einer Stärke von 0,1 bis 3 mm, vorzugsweise 1 bis 2 mm.It has been found that soils for tube bundle heat exchangers made of graphite, which are characterized in that the floors are composed of at least two parts are glued between impermeable carbonaceous layers, these Do not have any disadvantage. The impermeable carbonaceous layers exist . Advantageously from one or more graphite foils with a thickness of 0.1 to 3 mm, preferably 1 to 2 mm.
Vorteilhaft sind ebenfalls undurchlässige Schichten aus mit härtbaren Kunstharzen imprägnierten Graphit- oder Kohlenstoff-Filzen oder -Geweben mit einer Stärke von 1 bis 10 mm, vorzugsweise 3 bis 5 mm.Impermeable layers made of curable layers are also advantageous Synthetic resins impregnated graphite or carbon felts or fabrics with a Thickness of 1 to 10 mm, preferably 3 to 5 mm.
Als Ausgangsmaterial Sur Kohlenstoff-Filze und -Gewebe eignen sich besonders Textilarten, die zumindest teilweise aus tierischen Fasern, z. B. Wolle, bestehen. Durch das feine Faserwerk wird das Imprägnierharz in sehr kleine Volumenelemente zerteilt, so daß bei der Schwindung des Harzes nur winzige Poren und Risse entstehen, die jeweils von den benachbarten Fasern begrenzt werden.Carbon felts and fabrics are suitable as the starting material especially types of textiles that are at least partially made of animal fibers, e.g. B. wool, exist. The impregnating resin is transformed into very small volume elements due to the fine fibers divided so that only tiny pores and cracks appear when the resin shrinks, which are each limited by the neighboring fibers.
in Die/Luft nach der Vakuumverfallmethode gemessenen Permeabilitätskoeffizienten der kohlenstoffhaltigen Schichten betrugen unabhängig von der Dauer der Wärmebehandlung bei 2000C 10 bis lo cm2/sek¢. Die Permeabilität von Rohrbündelwärmetauschern gemäß der Erfindung nimmt auch bel längeren Betriebszeiten nicht zu, so daß Rohrbü.ndelwärmetauscher mit erfindungsgemäßen Böden bei Temperaturen verwendet werden können, bei. denen die bisher bekannten Wärmetauscher aus kunstharzimprägnierten Graphiten wegen der mit der Betriebszeit wachsenden Undichtigkeit nicht eingesetzt werden können. coefficient of permeability measured in die / air by the vacuum decay method of the carbonaceous layers were independent of the duration of the heat treatment at 2000C 10 to 10 cm2 / sec ¢. The permeability of tube bundle heat exchangers according to the invention does not increase bel longer operating times, so that Rohrbü.ndelwärmetauscher can be used with soils according to the invention at temperatures at. those the previously known heat exchangers made of synthetic resin-impregnated graphite because of the cannot be used if the leakage increases with the operating time.
Wärmetauscherböden gemäß der Erfindung werden zweckmäßig so ausgelegt, daß die Böden mindestens aus zwei Teilen bestehen und die Trennebeen vorzugsweise senkrecht zur Achse der Rohrbündel sind. Die undurchlassjcn kohlenstoffhaltigen Schichten aus Grapifolien oder kunstharzimprägnierten Graphit oder Kohlenstoff-Filzen werden mit einem Kunstharzkleber, z. B.Heat exchanger floors according to the invention are expediently designed so that the floors consist of at least two parts and the separation levels are preferred are perpendicular to the axis of the tube bundle. The impermeable carbonaceous Layers of graphite foils or synthetic resin-impregnated graphite or carbon felts are with a synthetic resin adhesive, z. B.
Phenol formaldehydharz. auf.die Trennebene der einzelnen Bodenteile geklebt.Phenol formaldehyde resin. auf.the parting line of the individual floor parts glued.
Bei. der Verwendung von kunstharzimprägnierten Graphit- oder Kohlenstoff-Filzen ist ein zusätzlicher Kleber nicht erforderlich, wenn die Filze mit einem Überschuß von Kunstharz durchtränkt werden.At. the use of synthetic resin-impregnated graphite or carbon felts an additional glue is not required if the felts with an excess soaked in synthetic resin.
Der Boden wird dann aus den Einzelteilen zusammengesetzt und die Klebverbindungen werden in bekannter Weise durch Erwärmen der Böden auf etwa 150°C ausgehärtet.The floor is then assembled from the individual parts and the adhesive joints are cured in a known manner by heating the floors to about 150 ° C.
Bild 1 erläutert beispielhaft die Erfindung. Der Boden des Rohrbündelwärmetauschers besteht aus den kunstharzimprägnierten Graphitteilen 1 und 2 mit durchgehenden Kanälen 3, die mit den kunstharzimprägnierten graphitrohren 4 fluchten. Zwischen die Graphitteile 1 und 2 ist eine impermeabele Graphitfolie oder ein imprägnierter Graphitfilz 5 geklebt. In der Graphitfolie oder dem Graphitfilz sind kreisförmige Ausnehmungen 6 angeordnet, die mit den durchgehenden Kanälen 3 zusammenfallen.Figure 1 explains the invention by way of example. The bottom of the shell and tube heat exchanger consists of synthetic resin-impregnated graphite parts 1 and 2 with continuous channels 3, which are flush with the synthetic resin-impregnated graphite tubes 4. Between the graphite parts 1 and 2 is an impermeable graphite foil or an impregnated graphite felt 5 glued. There are circular recesses in the graphite foil or graphite felt 6 arranged, which coincide with the continuous channels 3.
Claims (4)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19691941387 DE1941387A1 (en) | 1969-08-14 | 1969-08-14 | Tube heat exchanger with impermeable - graphite floor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19691941387 DE1941387A1 (en) | 1969-08-14 | 1969-08-14 | Tube heat exchanger with impermeable - graphite floor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE1941387A1 true DE1941387A1 (en) | 1971-04-08 |
Family
ID=5742800
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19691941387 Pending DE1941387A1 (en) | 1969-08-14 | 1969-08-14 | Tube heat exchanger with impermeable - graphite floor |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE1941387A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2578244A1 (en) * | 1984-12-27 | 1986-09-05 | Kureha Chemical Ind Co Ltd | CARBON ARTICLES COMPRISING PARTS OF CARBONACEOUS MATERIAL LINKED BETWEEN THEM AND MANUFACTURING METHOD THEREOF |
| DE3603305C1 (en) * | 1986-02-04 | 1987-07-23 | Sigri Gmbh | Process for the production of a carbon or graphite body which is impermeable to fluids and consists of several layers and contains graphite foil between the layers, and the use thereof |
-
1969
- 1969-08-14 DE DE19691941387 patent/DE1941387A1/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2578244A1 (en) * | 1984-12-27 | 1986-09-05 | Kureha Chemical Ind Co Ltd | CARBON ARTICLES COMPRISING PARTS OF CARBONACEOUS MATERIAL LINKED BETWEEN THEM AND MANUFACTURING METHOD THEREOF |
| DE3603305C1 (en) * | 1986-02-04 | 1987-07-23 | Sigri Gmbh | Process for the production of a carbon or graphite body which is impermeable to fluids and consists of several layers and contains graphite foil between the layers, and the use thereof |
| EP0231787A2 (en) * | 1986-02-04 | 1987-08-12 | SIGRI GmbH | Method of manufacturing an impervious carbon or graphite article |
| EP0231787A3 (en) * | 1986-02-04 | 1989-08-09 | Sigri Gmbh | Method of manufacturing an impervious carbon or graphite article |
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