CA2876547C - Plate heat exchanger - Google Patents
Plate heat exchanger Download PDFInfo
- Publication number
- CA2876547C CA2876547C CA2876547A CA2876547A CA2876547C CA 2876547 C CA2876547 C CA 2876547C CA 2876547 A CA2876547 A CA 2876547A CA 2876547 A CA2876547 A CA 2876547A CA 2876547 C CA2876547 C CA 2876547C
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- CA
- Canada
- Prior art keywords
- heat exchanger
- plate
- housing
- exchanger according
- medium
- 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.)
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- 239000000463 material Substances 0.000 claims abstract description 19
- 230000007797 corrosion Effects 0.000 claims abstract description 15
- 238000005260 corrosion Methods 0.000 claims abstract description 15
- 239000002320 enamel (paints) Substances 0.000 claims description 19
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 6
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 5
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 5
- 239000010959 steel Substances 0.000 claims description 5
- JKQOBWVOAYFWKG-UHFFFAOYSA-N molybdenum trioxide Chemical compound O=[Mo](=O)=O JKQOBWVOAYFWKG-UHFFFAOYSA-N 0.000 claims description 4
- FUJCRWPEOMXPAD-UHFFFAOYSA-N Li2O Inorganic materials [Li+].[Li+].[O-2] FUJCRWPEOMXPAD-UHFFFAOYSA-N 0.000 claims description 3
- KKCBUQHMOMHUOY-UHFFFAOYSA-N Na2O Inorganic materials [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 229910052681 coesite Inorganic materials 0.000 claims description 3
- 229910052906 cristobalite Inorganic materials 0.000 claims description 3
- XUCJHNOBJLKZNU-UHFFFAOYSA-M dilithium;hydroxide Chemical compound [Li+].[Li+].[OH-] XUCJHNOBJLKZNU-UHFFFAOYSA-M 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 3
- 239000000377 silicon dioxide Substances 0.000 claims description 3
- 235000012239 silicon dioxide Nutrition 0.000 claims description 3
- 229910052682 stishovite Inorganic materials 0.000 claims description 3
- 229910052905 tridymite Inorganic materials 0.000 claims description 3
- 210000003298 dental enamel Anatomy 0.000 abstract description 5
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- 238000010276 construction Methods 0.000 description 4
- 229910001220 stainless steel Inorganic materials 0.000 description 4
- 239000010935 stainless steel Substances 0.000 description 3
- 239000002253 acid Substances 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
- F28F13/18—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by applying coatings, e.g. radiation-absorbing, radiation-reflecting; by surface treatment, e.g. polishing
-
- 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
-
- 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
- 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
- F28D9/0031—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 the conduits for one heat-exchange medium being formed by paired plates touching each other
- F28D9/0043—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 the conduits for one heat-exchange medium being formed by paired plates touching each other the plates having openings therein for circulation of at least one heat-exchange medium from one conduit to another
-
- 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
- F28F21/04—Constructions of heat-exchange apparatus characterised by the selection of particular materials of ceramic; of concrete; of natural stone
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
Abstract
The invention relates to a plate heat exchanger consisting of a plate stack (2) and a housing (1) surrounding the plate stack, wherein the plates (2a) in the plate stack (2) are connected to each other in such a manner that alternatingly a first and at least one further medium can flow through adjacent intermediate plate spaces and that the one medium can be fed to the plate stack (2) via flow-through channels extending in the stack direction or can be discharged from said plate stack, while the other medium can be fed to the intermediate plate spaces associated with said medium via an intermediate space between the housing (1) and the plate stack (2) on the outer circumference or discharged from said intermediate plate spaces. It is essential that the following material combination is present: the plates (2a) of the plate stack (2) consist in the manner known per se of a corrosion-resistant material, whereas the housing (1) consists of a non-corrosion-resistant material, the inner side of which, to which the medium is applied, has an enamel.
Description
Plate heat exchanger Specification The invention relates to a plate heat exchanger consisting of a plate stack and a housing surrounding the plate stack, wherein the plates are connected with one another in the plate stack in such a manner that a first and at least one further medium can flow alternately through adjacent plate interstices, wherein the one medium can be conducted to and away from the plate stack by way of through-flow channels that run in the stack direction, while the other medium can be conducted to and away from the plate interstices assigned to it by way of an interstice between housing and plate stack on the outer circumference.
Plate heat exchangers of this type are known in numerous embodiments. The present invention relates not only to those constructions in which the plates have seals at their edge and around part of their through-flow openings and are tightly pressed together in the stack direction. This construction has the advantage that the plate stack can be opened, inspected, and cleaned in simple manner.
In addition, however, the present invention also relates to fully welded plate heat exchangers in accordance with US 6,158,238, US 2005/0039896, WO
2008/046952, and WO 2010/149858. In this connection, the plate stack consists of a plurality of plate pairs, where each plate pair is formed by two plates that are welded to one another at least along their outer circumference.
Each plate has at least two openings to allow a medium to flow through, adjacent plate pairs being connected with one another along these openings by means of welding, so that the said medium gets from one plate pair to the next through these openings. In contrast, the other medium flows through the interstice between housing and plate stack, and gets into the interstices between adjacent plate pairs by way of the outer circumference of the plate stack.
Furthermore, the invention also relates to mixed forms of the two aforementioned plate heat exchanger constructions, in other words to partly welded heat exchangers, in which plate pairs welded to one another are pressed against one another by way of seals, in other words only the interstices between adjacent plate pairs can be opened at any one time.
Of course, these plate heat exchangers can also be configured so that more than two media participate in the heat transfer or so that heat-transferring plate interstices do not follow one another directly, but rather an inactive plate interstice is placed in between, which functions as a safety cushion, for example.
To the extent that it was discussed initially that adjacent plate interstices alternately have a first and at least one further medium flowing through them, this therefore does not mean that this must always involve directly adjacent interstices; instead, a third medium can be accommodated in the directly adjacent interstice, whether as a stationary medium or as a through-flowing medium.
With regard to the material for the plate heat exchangers, it is usual to use stainless steels that are alloyed with chromium and nickel. For corrosion resistance to acids, for example, it is furthermore known to add molybdenum as a further alloy component, or to use plates composed of titanium, nickel or their alloys. However, these materials have the disadvantage that they are very cost-intensive. It has therefore become known from WO 2008/046952 to produce the plates and the housing of the heat exchanger from carbon steel
Plate heat exchangers of this type are known in numerous embodiments. The present invention relates not only to those constructions in which the plates have seals at their edge and around part of their through-flow openings and are tightly pressed together in the stack direction. This construction has the advantage that the plate stack can be opened, inspected, and cleaned in simple manner.
In addition, however, the present invention also relates to fully welded plate heat exchangers in accordance with US 6,158,238, US 2005/0039896, WO
2008/046952, and WO 2010/149858. In this connection, the plate stack consists of a plurality of plate pairs, where each plate pair is formed by two plates that are welded to one another at least along their outer circumference.
Each plate has at least two openings to allow a medium to flow through, adjacent plate pairs being connected with one another along these openings by means of welding, so that the said medium gets from one plate pair to the next through these openings. In contrast, the other medium flows through the interstice between housing and plate stack, and gets into the interstices between adjacent plate pairs by way of the outer circumference of the plate stack.
Furthermore, the invention also relates to mixed forms of the two aforementioned plate heat exchanger constructions, in other words to partly welded heat exchangers, in which plate pairs welded to one another are pressed against one another by way of seals, in other words only the interstices between adjacent plate pairs can be opened at any one time.
Of course, these plate heat exchangers can also be configured so that more than two media participate in the heat transfer or so that heat-transferring plate interstices do not follow one another directly, but rather an inactive plate interstice is placed in between, which functions as a safety cushion, for example.
To the extent that it was discussed initially that adjacent plate interstices alternately have a first and at least one further medium flowing through them, this therefore does not mean that this must always involve directly adjacent interstices; instead, a third medium can be accommodated in the directly adjacent interstice, whether as a stationary medium or as a through-flowing medium.
With regard to the material for the plate heat exchangers, it is usual to use stainless steels that are alloyed with chromium and nickel. For corrosion resistance to acids, for example, it is furthermore known to add molybdenum as a further alloy component, or to use plates composed of titanium, nickel or their alloys. However, these materials have the disadvantage that they are very cost-intensive. It has therefore become known from WO 2008/046952 to produce the plates and the housing of the heat exchanger from carbon steel
2 with a carbon content of 0.05% to 2.1%, from which sufficient corrosion resistance is supposed to result for many application cases.
The present invention is based on the task of improving heat exchangers of the constructions described initially, to the effect that on the one hand, excellent corrosion resistance is guaranteed, and on the other hand, the production costs are significantly more advantageous than before.
This task is accomplished, according to the invention, in that the following combination of materials is selected: The plates of the plate stack consist, in known manner, of corrosion-resistant material, particularly stainless steel, whereas the housing consists of a non-corrosion-resistant material, which has an enamel coating on its inner side, which is impacted by medium.
By means of this combination of materials, the material costs of the housing are significantly reduced, without detriment to its corrosion resistance.
Therefore great corrosion resistance is achieved at lower costs.
Fundamentally, the housing of the heat exchanger can consist of almost any desired material, as long as it is sufficiently stable and firm and suitable as a support for the enamel coating. It is particularly practical to produce the housing from enameled black steel.
It is practical if a multi-layer enamel coating is used for the enamel coating consisting of a base enamel that is characterized by good adhesion to the metallic support material of the housing and by smoothing of the same, and of a cover enamel that demonstrates great chemical resistance, and, in particular, is acid-resistant.
For the material composition of the enamel coating, at least with regard to its cover layer, it is recommended that it contains more than 50%, preferably more
The present invention is based on the task of improving heat exchangers of the constructions described initially, to the effect that on the one hand, excellent corrosion resistance is guaranteed, and on the other hand, the production costs are significantly more advantageous than before.
This task is accomplished, according to the invention, in that the following combination of materials is selected: The plates of the plate stack consist, in known manner, of corrosion-resistant material, particularly stainless steel, whereas the housing consists of a non-corrosion-resistant material, which has an enamel coating on its inner side, which is impacted by medium.
By means of this combination of materials, the material costs of the housing are significantly reduced, without detriment to its corrosion resistance.
Therefore great corrosion resistance is achieved at lower costs.
Fundamentally, the housing of the heat exchanger can consist of almost any desired material, as long as it is sufficiently stable and firm and suitable as a support for the enamel coating. It is particularly practical to produce the housing from enameled black steel.
It is practical if a multi-layer enamel coating is used for the enamel coating consisting of a base enamel that is characterized by good adhesion to the metallic support material of the housing and by smoothing of the same, and of a cover enamel that demonstrates great chemical resistance, and, in particular, is acid-resistant.
For the material composition of the enamel coating, at least with regard to its cover layer, it is recommended that it contains more than 50%, preferably more
3 than 60% SiO2 and/or more than 3.5%, preferably more than 4.5% TiO2 and/or more than 12%, preferably more than 15% Na2O.
Furthermore, it is recommended that the enamel coating, at least in its cover layer, contains B203 and/or Ka20 and/or Li2O and/or Mo03 and/or MnO and/or ZrO2 and/or F, preferably in the one-digit percentage range, in each instance.
In addition, it is recommended to add BaO and/or Co0 and/or V205, preferably in the parts per thousand range, in each instance.
The thickness of the enamel coating amounts to about 1 mm to 3 mm, preferably about 2 mm.
For the connector pieces usually welded onto the housing, a person skilled in the art is aware of known alternatives, particularly, therefore, of the use of stainless steel. However, it also lies within the scope of the invention to use enameled black steel also for these connector pieces, particularly to the extent that they are provided for the medium flowing through the interstice between housing and plate package.
Further characteristics and advantages of the invention are evident from the following description of an exemplary embodiment and from the drawing; in this connection, the figures show:
Figure 1: a section through the plate heat exchanger according to the invention, transverse to the plates;
Figure 2: a top view of the outside and the inside of a plate pair;
In the drawing, a housing 1 can be seen, which surrounds a plate package 2 in known manner. The housing as well as the plate package can have a rectangular shape, but also a circular or other contour.
Furthermore, it is recommended that the enamel coating, at least in its cover layer, contains B203 and/or Ka20 and/or Li2O and/or Mo03 and/or MnO and/or ZrO2 and/or F, preferably in the one-digit percentage range, in each instance.
In addition, it is recommended to add BaO and/or Co0 and/or V205, preferably in the parts per thousand range, in each instance.
The thickness of the enamel coating amounts to about 1 mm to 3 mm, preferably about 2 mm.
For the connector pieces usually welded onto the housing, a person skilled in the art is aware of known alternatives, particularly, therefore, of the use of stainless steel. However, it also lies within the scope of the invention to use enameled black steel also for these connector pieces, particularly to the extent that they are provided for the medium flowing through the interstice between housing and plate package.
Further characteristics and advantages of the invention are evident from the following description of an exemplary embodiment and from the drawing; in this connection, the figures show:
Figure 1: a section through the plate heat exchanger according to the invention, transverse to the plates;
Figure 2: a top view of the outside and the inside of a plate pair;
In the drawing, a housing 1 can be seen, which surrounds a plate package 2 in known manner. The housing as well as the plate package can have a rectangular shape, but also a circular or other contour.
4 The plate package 2 consists of plates 2a welded to one another in pairs, each plate pair having a medium flowing through it, which is conducted in by way of at least one connector piece 3 in the upper region of the plate package and conducted away by way of at least one connector piece 4 on the lower region of the plate package. For this purpose, the plates 2a have through-flow openings, in known manner, which align with the connector pieces 3 and 4.
Adjacent plate pairs are welded to one another at least along these through-flow openings, so that through-flow gaps for the other medium are formed between all the adjacent plate pairs. This other medium is conducted into the upper circumference of the plate package 2 by way of a connector piece 5, leaves the plate package at the lower edge, and is conducted away by means of a connector piece 6. In this connection, known installations la in the housing 1 ensure that the medium last mentioned cannot flow around the plate package on the outside, but rather must flow through the gap between the plate pairs.
The heat exchanger described is structured to be fully welded and without seals. Depending on the flow direction selected, it can be operated in co-flow, counter-flow, or cross-flow mode.
It is now essential that the housing 1 consists of non-corrosion-resistant material and has a technical enamel coating on all its inside walls ¨ at least to the extent that they are impacted by a related medium ¨ having a thickness of about 2 mm. In contrast, the plate package 2 and its connector pieces 3 and 4 consist of corrosion-resistant stainless steel.
To the extent that the inner coating of the housing 1 with enamel was mentioned above, of course this also relates to the installations la that serve for conducting the flow, which are disposed not only on the face sides of the plate stack 2, but rather also in the circumference regions of the plate stack.
For the configuration of the housing 1, it is recommended that it can be opened from at least one face side, in that a releasable lid is provided there. Of course, this lid can also have the enamel coating described above on its side impacted by medium. If direct contact of opposite enamel layers occurs when the lid is screwed in place, this is preferably avoided in that an elastic seal composed of corrosion-resistant plastic is laid in between.
A particularly practical composition of the enamel coating, at least on its outer cover layer, can be defined as follows:
65% SiO2, 15% Na2O, 5% Ti02, 3.5 ZrO2, 2.5% B203, 1.8% F, 1.7% Li2O, 1.4% MnO, 1.1% Mo03, 1% Ka20, 0.3% BaO, 0.25% V205, and 0.1% Co0;
in this connection, it does, of course, lie within the scope of the invention to change the aforementioned percentages upward or downward from the initial value by 5% to 10%, in each instance.
Figure 2 illustrates the possibilities as to how adjacent plate pairs and how the plates of a plate pair are connected with one another or can be releasably attached to one another, the former being shown in the left half, the other view in the right half of Figure 2.
By analogy to the reference symbols used for the connector pieces in Figure 1, the through-flow opening in the plate 2a assigned to the upper connector piece 3 is marked with the reference symbol 3a, and the through-flow opening assigned to the lower connector piece 4 is marked with the reference symbol 4a.
In the top view of the outside of a plate pair shown on the left, the connection with the adjacent plate pair ¨ whether it is releasable or non-releasable ¨
takes place along the circumference of the through-flow openings 3a and 4a, in other words in the blackened region 13a or 14a. In these regions, which in practice one should imagine to have not the circumference ranges of 1800 shown in the drawing, but rather the full circumference ranges of 360 , adjacent plate pairs can be welded to one another.
Likewise, it is possible to provide a releasable connection in place of a welded connection; then, a seal is disposed in the blackened regions, of course once again over the entire opening circumference, and the plate pairs are pressed together axially, from the outside, so that adjacent plate pairs follow one another, in sealed manner, in the circumference region of the through-flow openings 3a and 4a.
In both cases, the interstice between adjacent plate pairs that lies outside of the weld seams or seals 13a and 14a has the other medium flowing through it, which medium is conducted in or away by way of the connector pieces 5 and 6.
In the right half of Figure 2, the connection of two plates of the same plate pair is shown, specifically with a view from the interior of the plate pair. Here, the plates are welded to one another along their outer circumference, in each instance, or releasably pressed against an intermediate seal. This welded or sealed region is marked with the reference symbol 15, where here, too, it must be kept in mind that the welded or sealed region extends over the entire circumference, in other words over 360 .
The through-flow openings 3a and 4a are open toward the interior of the plate pair, so that the medium can flow from the through-flow opening 3a through the interior of the plate pair to the through-flow opening 4a.
The heat exchanger is shown only schematically in Figure 1 and 2, because in the present case, the only matter of concern is the special combination of materials, and the flow schematics and the welding variants of the plates correspond to the known state of the art.
In the end result, it can be stated that the present invention is characterized by excellent corrosion resistance at comparatively low production costs, by means of the material combination presented.
Adjacent plate pairs are welded to one another at least along these through-flow openings, so that through-flow gaps for the other medium are formed between all the adjacent plate pairs. This other medium is conducted into the upper circumference of the plate package 2 by way of a connector piece 5, leaves the plate package at the lower edge, and is conducted away by means of a connector piece 6. In this connection, known installations la in the housing 1 ensure that the medium last mentioned cannot flow around the plate package on the outside, but rather must flow through the gap between the plate pairs.
The heat exchanger described is structured to be fully welded and without seals. Depending on the flow direction selected, it can be operated in co-flow, counter-flow, or cross-flow mode.
It is now essential that the housing 1 consists of non-corrosion-resistant material and has a technical enamel coating on all its inside walls ¨ at least to the extent that they are impacted by a related medium ¨ having a thickness of about 2 mm. In contrast, the plate package 2 and its connector pieces 3 and 4 consist of corrosion-resistant stainless steel.
To the extent that the inner coating of the housing 1 with enamel was mentioned above, of course this also relates to the installations la that serve for conducting the flow, which are disposed not only on the face sides of the plate stack 2, but rather also in the circumference regions of the plate stack.
For the configuration of the housing 1, it is recommended that it can be opened from at least one face side, in that a releasable lid is provided there. Of course, this lid can also have the enamel coating described above on its side impacted by medium. If direct contact of opposite enamel layers occurs when the lid is screwed in place, this is preferably avoided in that an elastic seal composed of corrosion-resistant plastic is laid in between.
A particularly practical composition of the enamel coating, at least on its outer cover layer, can be defined as follows:
65% SiO2, 15% Na2O, 5% Ti02, 3.5 ZrO2, 2.5% B203, 1.8% F, 1.7% Li2O, 1.4% MnO, 1.1% Mo03, 1% Ka20, 0.3% BaO, 0.25% V205, and 0.1% Co0;
in this connection, it does, of course, lie within the scope of the invention to change the aforementioned percentages upward or downward from the initial value by 5% to 10%, in each instance.
Figure 2 illustrates the possibilities as to how adjacent plate pairs and how the plates of a plate pair are connected with one another or can be releasably attached to one another, the former being shown in the left half, the other view in the right half of Figure 2.
By analogy to the reference symbols used for the connector pieces in Figure 1, the through-flow opening in the plate 2a assigned to the upper connector piece 3 is marked with the reference symbol 3a, and the through-flow opening assigned to the lower connector piece 4 is marked with the reference symbol 4a.
In the top view of the outside of a plate pair shown on the left, the connection with the adjacent plate pair ¨ whether it is releasable or non-releasable ¨
takes place along the circumference of the through-flow openings 3a and 4a, in other words in the blackened region 13a or 14a. In these regions, which in practice one should imagine to have not the circumference ranges of 1800 shown in the drawing, but rather the full circumference ranges of 360 , adjacent plate pairs can be welded to one another.
Likewise, it is possible to provide a releasable connection in place of a welded connection; then, a seal is disposed in the blackened regions, of course once again over the entire opening circumference, and the plate pairs are pressed together axially, from the outside, so that adjacent plate pairs follow one another, in sealed manner, in the circumference region of the through-flow openings 3a and 4a.
In both cases, the interstice between adjacent plate pairs that lies outside of the weld seams or seals 13a and 14a has the other medium flowing through it, which medium is conducted in or away by way of the connector pieces 5 and 6.
In the right half of Figure 2, the connection of two plates of the same plate pair is shown, specifically with a view from the interior of the plate pair. Here, the plates are welded to one another along their outer circumference, in each instance, or releasably pressed against an intermediate seal. This welded or sealed region is marked with the reference symbol 15, where here, too, it must be kept in mind that the welded or sealed region extends over the entire circumference, in other words over 360 .
The through-flow openings 3a and 4a are open toward the interior of the plate pair, so that the medium can flow from the through-flow opening 3a through the interior of the plate pair to the through-flow opening 4a.
The heat exchanger is shown only schematically in Figure 1 and 2, because in the present case, the only matter of concern is the special combination of materials, and the flow schematics and the welding variants of the plates correspond to the known state of the art.
In the end result, it can be stated that the present invention is characterized by excellent corrosion resistance at comparatively low production costs, by means of the material combination presented.
Claims (13)
1. Plate heat exchanger consisting of a plate stack (2) and a housing (1) surrounding the plate stack, wherein the plates (2a) are connected with one another in the plate stack (2) in such a manner that a first medium and at least one second medium can flow alternately through adjacent plate interstices, and one medium of said first and second media can be conducted to and away from the plate stack (2) by way of through-flow channels that run in the stack direction, while the other medium of said first and second media can be conducted to and away from the plate interstices assigned to it by way of an interstice between housing (1) and plate stack (2) on an outer circumference of said plate heat exchanger, characterized in that the following combination of materials is present: The plates (2a) of the plate stack (2) consist, in known manner, of corrosion-resistant material, whereas the housing (1) consists of a non-corrosion-resistant material that has an enamel coating on its inner side, which is impacted by one of said first and second media.
2. Heat exchanger according to claim 1, characterized in that the housing consists of enameled black steel.
3. Heat exchanger according to claim 1, characterized in that the enamel coating has multiple layers.
4. Heat exchanger according to claim 1, characterized in that the enamel coating consists of at least one base coating and at least one cover coating.
5. Heat exchanger according to claim 1 or 4, characterized in that the enamel coating, at least in its cover layer, contains more than 50%, preferably more than 60% SiO2.
6. Heat exchanger according to claim 1 or 4, characterized in that the enamel coating, at least in its cover layer, contains more than 3.5%, preferably more than 4.5% TiO2.
7. Heat exchanger according to claim 1 or 4, characterized in that the enamel coating, at least in its cover layer, contains more than 12%, preferably about 15% Na2O.
8. Heat exchanger according to claim 1 or 4, characterized in that the enamel coating, at least in its cover layer, contains B2O3 and/or K2O and/or Li2O and/or MoO3 and/or MnO and/or ZrO2 and/or F, preferably in the one-digit percentage range, in each instance.
9. Heat exchanger according to claim 1 or 4, characterized in that the enamel coating, at least in its cover layer, contains BaO and/or CoO and/or V2O5, preferably in a range of 0.09% to 0.33% in each instance.
10. Heat exchanger according to claim 1, characterized in that the enamel coating has a thickness of about 1 mm to about 3 mm, preferably of about 1.5 mm to about 2.5 mm.
11. Heat exchanger according to claim 1, characterized in that the housing (1) has welded-on installations (1a) for guiding the flow, which also consist of enameled black steel.
12. Heat exchanger according to claim 1, characterized in that the housing (1) has welded-on connector pieces (5, 6), which also consist of enameled black steel.
13. Heat exchanger according to claim 1, characterized in that the housing (1) has housing parts (1a, 1b) that can be screwed onto one another.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102012011936A DE102012011936A1 (en) | 2012-06-18 | 2012-06-18 | Plate heat exchangers |
| DE102012011936.4 | 2012-06-18 | ||
| PCT/EP2013/001788 WO2013189587A1 (en) | 2012-06-18 | 2013-06-17 | Plate heat exchanger |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2876547A1 CA2876547A1 (en) | 2013-12-27 |
| CA2876547C true CA2876547C (en) | 2020-06-09 |
Family
ID=48670487
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2876547A Active CA2876547C (en) | 2012-06-18 | 2013-06-17 | Plate heat exchanger |
Country Status (10)
| Country | Link |
|---|---|
| US (1) | US20150168085A1 (en) |
| EP (1) | EP2861930B1 (en) |
| JP (1) | JP2015524044A (en) |
| KR (1) | KR20150029709A (en) |
| CN (1) | CN104395686A (en) |
| BR (1) | BR112014031145B1 (en) |
| CA (1) | CA2876547C (en) |
| DE (1) | DE102012011936A1 (en) |
| RU (1) | RU2622452C2 (en) |
| WO (1) | WO2013189587A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11746241B2 (en) | 2020-01-14 | 2023-09-05 | Hamilton Sundstrand Corporation | Antifungal/antibacterial hydrophilic coating |
| US11970414B2 (en) * | 2020-07-07 | 2024-04-30 | Hamilton Sundstrand Corporation | Water system component |
Family Cites Families (28)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2542994A (en) * | 1945-07-09 | 1951-02-27 | Armco Steel Corp | Electrolytic surface treatment of steel |
| GB1221834A (en) * | 1968-03-19 | 1971-02-10 | Curwen & Newberry Ltd | Improvements in or relating to heat exchangers |
| JPS485368U (en) * | 1971-06-02 | 1973-01-22 | ||
| GB1521683A (en) * | 1975-11-03 | 1978-08-16 | Babcock & Wilcox Ltd | Heat exchangers |
| SU1216615A1 (en) * | 1984-08-27 | 1986-03-07 | Предприятие П/Я Р-6914 | Enamelled heat exchanger |
| US4661171A (en) * | 1984-08-29 | 1987-04-28 | Shinko-Pfaudler Company, Ltd. | Method for treating the surface of stainless steel by high temperature oxidation |
| JPS61101797A (en) * | 1984-10-22 | 1986-05-20 | Kawasaki Heavy Ind Ltd | Heat conductive plate of plate type heat exchanger |
| JPS63291670A (en) * | 1988-04-28 | 1988-11-29 | Gadelius Kk | Manufacture of heat transfer tube for heat exchanger |
| CN1014724B (en) * | 1988-05-21 | 1991-11-13 | 西安人民搪瓷厂 | Technique of silico-manganese steel enamel |
| JPH0314579U (en) * | 1989-06-12 | 1991-02-14 | ||
| FR2685462B1 (en) * | 1991-12-23 | 1999-02-05 | Andre Peze | WELDED PLATE HEAT EXCHANGER AND METHOD FOR MANUFACTURING PLATE MODULES FOR OBTAINING SUCH EXCHANGERS. |
| NL9200698A (en) * | 1992-04-16 | 1993-11-16 | Abb Lummus Heat Transfer | PLATE HEAT EXCHANGER AND METHOD FOR THE PRODUCTION THEREOF. |
| SE502796C2 (en) * | 1994-05-18 | 1996-01-15 | Tetra Laval Holdings & Finance | Flat heat exchanger with lined connection pipes |
| FI106577B (en) | 1996-09-04 | 2001-02-28 | Abb Installaatiot Oy | Device for transmitting heating and cooling power |
| US6001494A (en) * | 1997-02-18 | 1999-12-14 | Technology Partners Inc. | Metal-ceramic composite coatings, materials, methods and products |
| CN2325747Y (en) * | 1998-01-23 | 1999-06-23 | 曹训仁 | Shell removing type heat-exchanger |
| FR2784372B1 (en) * | 1998-10-12 | 2001-09-07 | Lorraine Laminage | EMAIL APPLICATION COMPOSITION AND METHOD FOR MANUFACTURING ENAMELLED SHAPED PARTS |
| DE19954521C1 (en) * | 1999-11-12 | 2001-06-21 | Peter Pulverich | Heat exchanger for use with acid gases comprises steel, with surfaces which come into contact with gases having coating of bitumen, ceramic or metal powder |
| JP2001174173A (en) * | 1999-12-21 | 2001-06-29 | Denso Corp | Exhaust heat exchanger |
| FI114738B (en) * | 2000-08-23 | 2004-12-15 | Vahterus Oy | Heat exchanger with plate structure |
| JP2002332920A (en) * | 2001-05-10 | 2002-11-22 | Denso Corp | Exhaust heat exchanging device |
| FI118391B (en) | 2001-12-27 | 2007-10-31 | Vahterus Oy | Device for improving heat transfer in round plate heat exchangers |
| FI20060913L (en) | 2006-10-16 | 2008-04-17 | Vahterus Oy | Plate heat exchangers and the uses of a heat transfer plate |
| DE102006059834A1 (en) * | 2006-12-15 | 2008-07-10 | Schrage, Otto, Dipl.-Ing. | Plate for a heat exchanger comprises a plate-like support and a coating made from an alloy of nickel, silicon, chromium, cobalt, titanium, molybdenum, tungsten aluminum or boron |
| US8007930B2 (en) * | 2008-07-10 | 2011-08-30 | Ferro Corporation | Zinc containing glasses and enamels |
| FI20095707A0 (en) | 2009-06-24 | 2009-06-24 | Vahterus Oy | FLAT HEAT EXCHANGER AND PROCEDURE TO SUPPORT A FLAT HEAT EXCHANGER |
| JP5206809B2 (en) * | 2011-01-27 | 2013-06-12 | Ｊｆｅスチール株式会社 | Manufacturing method of black steel sheet with excellent electromagnetic shielding and corrosion resistance |
| RU2479815C1 (en) * | 2011-08-22 | 2013-04-20 | Открытое акционерное общество "Производственно-конструкторское объединение "Теплообменник" | Heat exchanger manufacturing method; heat exchanger from composite materials, and manufacturing method of corrugated plate for heat exchanger |
-
2012
- 2012-06-18 DE DE102012011936A patent/DE102012011936A1/en not_active Withdrawn
-
2013
- 2013-06-17 CA CA2876547A patent/CA2876547C/en active Active
- 2013-06-17 US US14/409,223 patent/US20150168085A1/en not_active Abandoned
- 2013-06-17 KR KR1020157001295A patent/KR20150029709A/en not_active Application Discontinuation
- 2013-06-17 CN CN201380032130.7A patent/CN104395686A/en active Pending
- 2013-06-17 EP EP13730487.9A patent/EP2861930B1/en active Active
- 2013-06-17 RU RU2014150458A patent/RU2622452C2/en active
- 2013-06-17 JP JP2015517632A patent/JP2015524044A/en active Pending
- 2013-06-17 WO PCT/EP2013/001788 patent/WO2013189587A1/en active Application Filing
- 2013-06-17 BR BR112014031145-5A patent/BR112014031145B1/en active IP Right Grant
Also Published As
| Publication number | Publication date |
|---|---|
| KR20150029709A (en) | 2015-03-18 |
| BR112014031145A2 (en) | 2017-08-08 |
| EP2861930B1 (en) | 2017-04-05 |
| RU2014150458A (en) | 2016-08-10 |
| US20150168085A1 (en) | 2015-06-18 |
| CN104395686A (en) | 2015-03-04 |
| DE102012011936A1 (en) | 2013-12-19 |
| WO2013189587A1 (en) | 2013-12-27 |
| RU2622452C2 (en) | 2017-06-15 |
| BR112014031145B1 (en) | 2020-09-01 |
| JP2015524044A (en) | 2015-08-20 |
| EP2861930A1 (en) | 2015-04-22 |
| CA2876547A1 (en) | 2013-12-27 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request |
Effective date: 20180426 |