EP0566208A1 - Plate type heat exchanger, and method of manufacturing it - Google Patents
Plate type heat exchanger, and method of manufacturing it Download PDFInfo
- Publication number
- EP0566208A1 EP0566208A1 EP93201092A EP93201092A EP0566208A1 EP 0566208 A1 EP0566208 A1 EP 0566208A1 EP 93201092 A EP93201092 A EP 93201092A EP 93201092 A EP93201092 A EP 93201092A EP 0566208 A1 EP0566208 A1 EP 0566208A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- plates
- heat exchanger
- edges
- type heat
- connecting flanges
- 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- Withdrawn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
- 238000004519 manufacturing process Methods 0.000 title claims description 4
- 239000012530 fluid Substances 0.000 claims abstract description 10
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 6
- 239000010959 steel Substances 0.000 claims abstract description 6
- 238000003466 welding Methods 0.000 claims description 17
- 238000000034 method Methods 0.000 claims description 9
- 239000004033 plastic Substances 0.000 claims description 9
- 229920003023 plastic Polymers 0.000 claims description 9
- 238000007789 sealing Methods 0.000 claims description 4
- 210000003298 dental enamel Anatomy 0.000 description 15
- 239000010410 layer Substances 0.000 description 8
- 239000002253 acid Substances 0.000 description 7
- 239000007789 gas Substances 0.000 description 5
- 150000007513 acids Chemical class 0.000 description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 239000004809 Teflon Substances 0.000 description 2
- 229920006362 Teflon® Polymers 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 235000011149 sulphuric acid Nutrition 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
Images
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
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/001—Casings in the form of plate-like arrangements; Frames enclosing a heat exchange core
-
- 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
- F28D9/0037—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 conduits for the other heat-exchange medium also being formed by paired plates touching each other
-
- 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
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F2235/00—Means for filling gaps between elements, e.g. between conduits within casings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F2265/00—Safety or protection arrangements; Arrangements for preventing malfunction
- F28F2265/26—Safety or protection arrangements; Arrangements for preventing malfunction for allowing differential expansion between elements
Definitions
- the invention relates to a plate type heat exchanger having a plurality of substantially parallel spaced apart plates in particular of enamelled steel, spaces for two separate fluid flows being alternately formed between the plates, and adjacent plates being joined at their edges, except for connecting openings, to form a plate pack.
- the plates are provided on their edges with packings of silicon rubber keeping the plates space apart and sealing the space between the plates.
- packings decay rather quickly, which leads to leakage.
- the object of the invention is to provide a plate type heat exchanger of the type mentioned in the preamble, in which this disadvantage is removed in an effective way.
- the plate type heat exchanger according to the invention is characterized in that the adjacent plates comprise on at least two edges connecting flanges bent over towards each other and connected by welding, at least the connecting flanges of some of said adjacent plates abut in flat relationship and are welded on their outer edges.
- the welded joint between the individual plates creates a very reliable seal which does not suffer from leakages also after a longer period of time.
- the welding operation is hindered by the enamel layer protecting the plates from the attack of acids and which might be broken by the welding operation leading to weak spots.
- the enamel of the plates melts at the inner edges of these flanges and flows into the seam between the flanges to such extent that their is formed a closed protective enamel layer on the inner edges obviating the necessity of a further after-treatment or renewed enamel covering of the whole plate pack. It is not necessary that all plates are interconnected in this manner. It is also possible that groups of plates are welded in another way and are enamelled (again).
- the invention is particularly suited for use in plate type heat exchangers working according to the cross-flow principle in which the fluid flows on both sides of each plate are directed substantially perpendicular. The perpendicularly directed edges of the plates are then alternately welded.
- a further problem with plate type heat exchangers is the suspension of the plate pack within a frame in such manner that a certain thermal expansion due to temperature variations is admitted.
- plastic block elements are provided at the corners of the plate pack allowing flanges of the frame to engage them to retain the plate pack within the frame.
- the plastic block elements also function as sealing elements on the corners of the plates, for which purpose they are preferably provided with grooves with which they may be put onto the plates.
- the invention further includes a method of manufacturing a plate type heat exchanger having a plurality of spaced parallel plates, in particular of enamelled steel, wherein adjacent plates are connected, except for connecting openings, on their edges into a plate pack, which is characterized according to the invention in that the edges of the plates are bent over to form connecting flanges, whereafter the plates are connected by welding at the position of the connecting flanges bent over towards each other, at least some of the plates being connected by means of connecting flanges abutting in flat relationship and being welded on their outer edges.
- This method allows at least a part of the enamelled plates to be welded together without necessitating a further after-treatment or enamelling treatment of the whole plate pack because, as mentioned before, the enamel starts to flow during the welding operation and forms a layer sealing the seams between the plate flanges.
- each group of plates in some cases it is possible to first weld small groups, for instance pairs, of plates to each other in a manner other than described and to enamel them again or for the first time, whereafter the groups of plates are assembled by welding the flanges abutting in a flat relationship in order to form the complete plate pack.
- the outer side of each group of plates or the complete pack can always be enamelled locally or completely by spraying.
- Fig. 1 is a perspective, partially cut-away view of an exemplary embodiment of a section of a heat exchanger according to the invention.
- Fig. 2 shows detail II of Fig. 1 with blocking elements demounted.
- Fig. 3 is a view corresponding to that of Fig. 2, but showing a modified embodiment.
- Fig. 4 is a view corresponding to that of Fig. 2, but showing still another embodiment.
- Fig. 5 is a view corresponding to that of Fig. 2, but showing still a further embodiment.
- the heat exchanger comprises a number of parallel spaced apart plates 2 assembled into a plate pack 1.
- the plates 2 define between them alternating spaces for two separate fluid flows between which heat should be exchanged.
- the heat exchanger works according to the cross-flow principle in which a first fluid flow (arrow A) is directed perpendicularly to the adjacent fluid flow (arrow B).
- the invention is, however, also useful with other principles, such as the counter-flow principle.
- the plates 2 are made of steel having a low carbon content (C ⁇ 0.05 %) covered by two layers of enamel in order to make the heat exchanger resistant to gasses containing aggressive acids and in environments within the heat exchanger having temperatures which are around of below the condensation point of the acid causing the risk of corrosion.
- the enamel layer offers an excellent protection against most of these acids, and in any case against H2SO4, H2SO3 and HCL. This makes the heat exchanger particularly suited for desulphurization and nitrogen reduction projects.
- the plate type heat exchanger is also suitable for use in post-burning installations in refuse incineration. Of course also other uses are conceivable.
- the plate 2 may for example have a thickness of 1.5 mm and a dimension of 1.2 x 1.8 meter.
- the plate 2 may for example have a thickness of 1.5 mm and a dimension of 1.2 x 1.8 meter.
- the overpressures of the gasses will mostly not exceed circa 50 kPa.
- the flanges 5 and 6 are of equal construction and extend parallel to the plane of the plates 2, but spaced therefrom.
- the flanges 5 and 6 are connected to the plates 2 through an inclined wall part 7, 8 respectively.
- the connecting flanges 5 or 6 of two opposite edges thereof are positioned in flat abutting relationship and the outer edges thereof are welded so as to form an edge weld 9, 10 respectively. Due to the heat supply during the welding of the connecting flanges 5, 6, the enamel of the enamel layer of both plates 2 flows together on the inner edges of these connecting flanges 5, 6 so that a closed enamel layer is formed over the seam between the connecting flanges 5 or 6 of both adjacent plates 2. In this manner there is created a full protective layer around the flow space for the fluids preventing corrosion of the plates 2, without further after-treatment or enamel covering of the plates 2.
- a favourable welding method is the laser welding method because the heat supply can there be controlled very well and consequently a controlled flow of the enamel can be obtained.
- the plate pack 1 formed by welding together the individual plates 2, within a frame 11, shown partly in Fig. 1, there are positioned on four edges of the plate pack 1 plastic block elements 12 allowing engagement of corner sections 13 of the frame 11 to confine the plate pack 1 within the frame 11 by clamping it together.
- the block elements are made up from a plurality of small plastic blocks 14 and 15 having a similar shape, but being mounted alternately in a different manner to the plate pack so as to create the block element 12.
- each connecting flange 5, 6 terminates a distance from the adjacent perpendicular edge of the respective plate 2, and also a portion of the wall part 7, 8 is taken away along the same distance.
- each small block 14, 15 are arranged two inclined grooves 16 with which the blocks 14, 15 may be slid over the wall portions 7 or 8 of adjacent plates 2 allowing the blocks 14, 15 to partially submerge in the space between adjacent plates 2.
- the blocks 14, 15 function as seal element on corner edges of the plate pack 1 and the created block elements 12 form flanges for the plate pack 1 admitting a certain thermal expansion.
- a material of the blocks 14, 15 suited for these purposes is for instance teflon, which is resistant to acids and high temperatures up to 270°C. Of course also other plastics may be used depending on the use of the heat exchanger. Another conceivable plastic is polyvinyldifluoride.
- the embodiment of the heat exchanger shown in Fig. 1 is particularly suited for the heat exchange between a clean gas flowing horizontally through horizontal flow spaces between the adjacent plates 2 (arrow A) and an aggressive gas flowing vertically through the adjacent spaces according to arrow B. Any condensate of such an aggressive gas will flow along the walls of the plates 2 to the exterior of the plate pack 1 so that no acid remains within the plate pack.
- a clean gas flowing horizontally through horizontal flow spaces between the adjacent plates 2 (arrow A)
- an aggressive gas flowing vertically through the adjacent spaces according to arrow B Any condensate of such an aggressive gas will flow along the walls of the plates 2 to the exterior of the plate pack 1 so that no acid remains within the plate pack.
- To form larger heat exchangers it is possible to connect several plate packs 1 to each other, but on the other hand it is also possible to connect a supply and discharge for the respective gasses to the plate pack 1 as shown.
- Fig. 3 shows an alternative of the embodiment of Fig. 2, the difference being that the wall portions 7 and 8 are not bent over 45° as in Fig. 2, but an angle of 90° with respect to the plane of the plates 2.
- the shape of the blocks 14, 15 is adapted to the shape of the connecting flanges 5, 6 and wall parts 7, 8.
- This embodiment is suited for the same use as that of Fig. 2, but for higher pressures of the gasses, or for another use in which the load on the plates 2 can be high.
- the embodiment of the heat exchanger of Fig. 4 is particularly suited for exchanging heat between two corrosive gasses.
- the connecting flanges 6 and the wall parts 8 on the upper and lower side of the plates 2 are replaced by a horizontally flanged flange 17, the flanges 17 of adjacent plates 2 being interconnected by means of a buttweld 18.
- pairs of plates 2 are each time connected to each other through the connecting flanges 17, the butt ends of the flanges 17 are grind and etched on the outer side. Then each pair of plates 2 is again enamelled completely.
- the pairs of plates 2 are interconnected to the connecting flanges 5 in a manner described above and are assembled into the plate pack 1.
- the plate pack 1 is suspended within the frame 11 at an angle of 1 to 2° in order to allow the corrosive condensate of the gas to flow out.
- Fig. 5 shows another variant of the embodiment of Fig. 4.
- the dimensions of the blocks 15 are minimized.
- the slots 16 are omitted which is made possible by removing the upper edges of the wall parts 7.
- an enamelled cover plate 19 on the pair of abutting flanges 5 with an interposed ceramic paste.
- the outer end of each block 15 has a downwardly projecting edge 20 lying over the cover plate 19.
- the frame in which the plate pack 1 is suspended, preferably comprises adjusting elements, such as adjustable supports or spacers.
- adjusting elements such as adjustable supports or spacers.
- the invention is not restricted to the embodiments described above and shown in the drawing, which can be varied in different manners within the scope of the invention. It is for instance possible to replace enamel by another material as protecting layer on the plates, which flows at higher temperatures. Also other welding methods besides laser welding can be used.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
In a plate type heat exchanger having a plurality of substantially parallel spaced apart plates (2), in particular of enamelled steel, spaces for two separate fluid flows are alternately formed between the plates. Adjacent plates (2) are joined at their edges, except for connecting openings, to form a plate pack. On at least two edges, the adjacent plates comprise connecting flanges (5, 6) bent over towards each other and being welded together. At least the connecting flanges (5, 6) of some of the adjacent plates are in flat abutting relationship and are welded together on their outer edges.
Description
- The invention relates to a plate type heat exchanger having a plurality of substantially parallel spaced apart plates in particular of enamelled steel, spaces for two separate fluid flows being alternately formed between the plates, and adjacent plates being joined at their edges, except for connecting openings, to form a plate pack.
- In a known embodiment of such plate type heat exchanger, the plates are provided on their edges with packings of silicon rubber keeping the plates space apart and sealing the space between the plates. The disadvantage of this structure is that the packings decay rather quickly, which leads to leakage.
- The object of the invention is to provide a plate type heat exchanger of the type mentioned in the preamble, in which this disadvantage is removed in an effective way.
- For this purpose, the plate type heat exchanger according to the invention is characterized in that the adjacent plates comprise on at least two edges connecting flanges bent over towards each other and connected by welding, at least the connecting flanges of some of said adjacent plates abut in flat relationship and are welded on their outer edges.
- The welded joint between the individual plates creates a very reliable seal which does not suffer from leakages also after a longer period of time. The welding operation, however, is hindered by the enamel layer protecting the plates from the attack of acids and which might be broken by the welding operation leading to weak spots. It has been surprisingly found, however, that when the connecting flanges abutting in flat relationship are welded on their outer edges, the enamel of the plates melts at the inner edges of these flanges and flows into the seam between the flanges to such extent that their is formed a closed protective enamel layer on the inner edges obviating the necessity of a further after-treatment or renewed enamel covering of the whole plate pack. It is not necessary that all plates are interconnected in this manner. It is also possible that groups of plates are welded in another way and are enamelled (again).
- The invention is particularly suited for use in plate type heat exchangers working according to the cross-flow principle in which the fluid flows on both sides of each plate are directed substantially perpendicular. The perpendicularly directed edges of the plates are then alternately welded.
- A further problem with plate type heat exchangers is the suspension of the plate pack within a frame in such manner that a certain thermal expansion due to temperature variations is admitted.
- According to the invention this problem is solved in that plastic block elements are provided at the corners of the plate pack allowing flanges of the frame to engage them to retain the plate pack within the frame.
- These plastic block elements create a rigid edge enabling the retainment within the frame but nevertheless admitting a certain warping effect of the plate pack.
- Preferably, the plastic block elements also function as sealing elements on the corners of the plates, for which purpose they are preferably provided with grooves with which they may be put onto the plates.
- The invention further includes a method of manufacturing a plate type heat exchanger having a plurality of spaced parallel plates, in particular of enamelled steel, wherein adjacent plates are connected, except for connecting openings, on their edges into a plate pack, which is characterized according to the invention in that the edges of the plates are bent over to form connecting flanges, whereafter the plates are connected by welding at the position of the connecting flanges bent over towards each other, at least some of the plates being connected by means of connecting flanges abutting in flat relationship and being welded on their outer edges.
- This method allows at least a part of the enamelled plates to be welded together without necessitating a further after-treatment or enamelling treatment of the whole plate pack because, as mentioned before, the enamel starts to flow during the welding operation and forms a layer sealing the seams between the plate flanges. In order to control this flow of the enamel, it is preferred to use the laser welding method in which the temperature and penetration depth of the supplied heat can be controlled very accurately.
- In some cases it is possible to first weld small groups, for instance pairs, of plates to each other in a manner other than described and to enamel them again or for the first time, whereafter the groups of plates are assembled by welding the flanges abutting in a flat relationship in order to form the complete plate pack. The outer side of each group of plates or the complete pack can always be enamelled locally or completely by spraying.
- The invention will hereafter be elucidated with reference to the drawing showing a number of embodiments of the plate type heat exchanger according to the invention by way of example.
- Fig. 1 is a perspective, partially cut-away view of an exemplary embodiment of a section of a heat exchanger according to the invention.
- Fig. 2 shows detail II of Fig. 1 with blocking elements demounted.
- Fig. 3 is a view corresponding to that of Fig. 2, but showing a modified embodiment.
- Fig. 4 is a view corresponding to that of Fig. 2, but showing still another embodiment.
- Fig. 5 is a view corresponding to that of Fig. 2, but showing still a further embodiment.
- In the drawing there is shown a part of a plate type heat exchanger which is particularly suited for the exchange of heat between two fluids, in particular two gasses. In principle, it is, however, also possible to exchange heat between two liquids or between a liquid and a gas.
- The heat exchanger comprises a number of parallel spaced apart
plates 2 assembled into a plate pack 1. Theplates 2 define between them alternating spaces for two separate fluid flows between which heat should be exchanged. In the case shown, the heat exchanger works according to the cross-flow principle in which a first fluid flow (arrow A) is directed perpendicularly to the adjacent fluid flow (arrow B). The invention is, however, also useful with other principles, such as the counter-flow principle. - In the embodiment shown, the
plates 2 are made of steel having a low carbon content (C < 0.05 %) covered by two layers of enamel in order to make the heat exchanger resistant to gasses containing aggressive acids and in environments within the heat exchanger having temperatures which are around of below the condensation point of the acid causing the risk of corrosion. The enamel layer offers an excellent protection against most of these acids, and in any case against H₂SO₄, H₂SO₃ and HCL. This makes the heat exchanger particularly suited for desulphurization and nitrogen reduction projects. The plate type heat exchanger is also suitable for use in post-burning installations in refuse incineration. Of course also other uses are conceivable. - The
plate 2 may for example have a thickness of 1.5 mm and a dimension of 1.2 x 1.8 meter. In order to maintain the right interspacing between theplates 2 over the entire area there may be pressed concave or convexdepressions 3, 4 respectively, preventing theplates 2 from being pressed towards each other when there is a large differential pressure between adjacent flow spaces. In the uses as described the overpressures of the gasses will mostly not exceed circa 50 kPa. - As shown in Fig. 1, but in particular in Fig. 2, each time two edges of
adjacent plates 2 are connected by connectingflanges flanges plates 2, but spaced therefrom. Theflanges plates 2 through aninclined wall part - To connect
adjacent plates 2, the connectingflanges edge weld flanges plates 2 flows together on the inner edges of these connectingflanges flanges adjacent plates 2. In this manner there is created a full protective layer around the flow space for the fluids preventing corrosion of theplates 2, without further after-treatment or enamel covering of theplates 2. A favourable welding method is the laser welding method because the heat supply can there be controlled very well and consequently a controlled flow of the enamel can be obtained. - To arrange the plate pack 1 formed by welding together the
individual plates 2, within aframe 11, shown partly in Fig. 1, there are positioned on four edges of the plate pack 1plastic block elements 12 allowing engagement ofcorner sections 13 of theframe 11 to confine the plate pack 1 within theframe 11 by clamping it together. In the case shown, the block elements are made up from a plurality of smallplastic blocks block element 12. - As is shown in Fig. 2 each connecting
flange respective plate 2, and also a portion of thewall part small block inclined grooves 16 with which theblocks wall portions adjacent plates 2 allowing theblocks adjacent plates 2. In this manner theblocks block elements 12 form flanges for the plate pack 1 admitting a certain thermal expansion. A material of theblocks - The embodiment of the heat exchanger shown in Fig. 1 is particularly suited for the heat exchange between a clean gas flowing horizontally through horizontal flow spaces between the adjacent plates 2 (arrow A) and an aggressive gas flowing vertically through the adjacent spaces according to arrow B. Any condensate of such an aggressive gas will flow along the walls of the
plates 2 to the exterior of the plate pack 1 so that no acid remains within the plate pack. To form larger heat exchangers it is possible to connect several plate packs 1 to each other, but on the other hand it is also possible to connect a supply and discharge for the respective gasses to the plate pack 1 as shown. - Fig. 3 shows an alternative of the embodiment of Fig. 2, the difference being that the
wall portions plates 2. The shape of theblocks flanges wall parts plates 2 can be high. - The embodiment of the heat exchanger of Fig. 4 is particularly suited for exchanging heat between two corrosive gasses. For this purpose, the connecting
flanges 6 and thewall parts 8 on the upper and lower side of theplates 2 are replaced by a horizontally flangedflange 17, theflanges 17 ofadjacent plates 2 being interconnected by means of abuttweld 18. In the production of the plate pack 1 in this embodiment pairs ofplates 2 are each time connected to each other through the connectingflanges 17, the butt ends of theflanges 17 are grind and etched on the outer side. Then each pair ofplates 2 is again enamelled completely. As next step the pairs ofplates 2 are interconnected to the connectingflanges 5 in a manner described above and are assembled into the plate pack 1. During operation, the plate pack 1 is suspended within theframe 11 at an angle of 1 to 2° in order to allow the corrosive condensate of the gas to flow out. - Fig. 5 shows another variant of the embodiment of Fig. 4. The dimensions of the
blocks 15 are minimized. Theslots 16 are omitted which is made possible by removing the upper edges of thewall parts 7. To protect theweld 9 in aggressive, for example acid, surroundings there is arranged an enamelledcover plate 19 on the pair of abuttingflanges 5 with an interposed ceramic paste. The outer end of eachblock 15 has a downwardly projectingedge 20 lying over thecover plate 19. - The frame, in which the plate pack 1 is suspended, preferably comprises adjusting elements, such as adjustable supports or spacers. By interposing a teflon cord the difference in extension between the frame and the plate pack upon warming up and cooling down can be absorbed.
- The invention is not restricted to the embodiments described above and shown in the drawing, which can be varied in different manners within the scope of the invention. It is for instance possible to replace enamel by another material as protecting layer on the plates, which flows at higher temperatures. Also other welding methods besides laser welding can be used.
Claims (13)
- Plate type heat exchanger having a plurality of substantially parallel spaced apart plates, in particular of enamelled steel, spaces for two separate fluid flows being alternately formed between the plates, and adjacent plates being joined at their edges, except for connecting openings, to form a plate pack, characterized in that the adjacent plates comprise on at least two edges connecting flanges bent over towards each other and connected by welding, at least the connecting flanges of some of said adjacent plates abut in flat relationship and are welded on their outer edges.
- Plate type heat exchanger according to claim 1, wherein only the connecting flanges of adjacent pairs of plates are in flat abutment parallel to the plane of the plates and are welded on their outer edges.
- Plate type heat exchanger according to claim 2, wherein the plates of said pairs are interconnected by connecting flanges abutting end-to-end and being butt-welded and then enamelled (again).
- Plate type heat exchanger according to claim 1, wherein all plates are connected by connecting flanges which abut in flat relationship and which are welded on their outer edges.
- Plate type heat exchanger according to one of the preceding claims, operating according to the cross-flow principle, wherein the fluid flows on both sides of each plate are directed substantially perpendicularly and wherein the perpendicularly directed edges of adjacent plates are alternately welded.
- Plate type heat exchanger according to one of the preceding claims, wherein plastic block elements are provided at the corners of the plate pack allowing flanges of the frame to engage them to retain the plate pack within the frame.
- Plate type heat exchanger according to claim 6, wherein a block element is provided on each pair of plates and adjacent block elements are in abutting relationship.
- Plate type heat exchanger according to claim 7, wherein the block elements are inserted onto the edges of those corner edges of the plates which are left free by the connecting flanges and also function as sealing element.
- Method of manufacturing a plate type heat exchanger having a plurality of spaced parallel plates, in particular of enamelled steel, wherein adjacent plates are connected, except for connecting openings, on their edges into a plate pack, characterized in that the edges of the plates are bent over to form connecting flanges, whereafter the plates are connected by welding at the position of the connecting flanges bent over towards each other, at least some of the plates being connected by means of connecting flanges abutting in flat relationship and being welded on their outer edges.
- Method according to claim 9, wherein all plates are welded to each other through said flanges abutting in flat relationship.
- Method according to claim 9, wherein several pairs of plates are butt-welded by means of connecting flanges bent over at right angles and are subsequently enamelled (again) whereafter said pairs of plates are welded together through their connecting flanges abutting in flat relationship.
- Method according to one of claims 9-11, wherein the welding operation is carried out by laser welding.
- Method according to one of claims 9-12, wherein the formed plate pack is secured within a frame by means of plastic block elements positioned on the four edges extending perpendicular to the plates of the plate pack, said block elements being clamped between flanges of the frame.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL9200698A NL9200698A (en) | 1992-04-16 | 1992-04-16 | PLATE HEAT EXCHANGER AND METHOD FOR THE PRODUCTION THEREOF. |
NL9200698 | 1992-04-16 |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0566208A1 true EP0566208A1 (en) | 1993-10-20 |
Family
ID=19860702
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP93201092A Withdrawn EP0566208A1 (en) | 1992-04-16 | 1993-04-15 | Plate type heat exchanger, and method of manufacturing it |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0566208A1 (en) |
JP (1) | JPH0611290A (en) |
NL (1) | NL9200698A (en) |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2806469A1 (en) * | 2000-03-20 | 2001-09-21 | Packinox Sa | METHOD FOR ASSEMBLING THE PLATES OF A BEAM OF PLATES AND BEAM OF PLATES MADE BY SUCH A PROCESS |
GB2361991A (en) * | 2000-03-10 | 2001-11-07 | Smiths Group Plc | A Heat Recovery Unit |
US6460614B1 (en) | 1997-12-02 | 2002-10-08 | De Dietrich Process Systems | Substantially flat enamelled metal heat exchanger |
EP1323998A2 (en) * | 2001-12-27 | 2003-07-02 | Xenesys Inc. | Heat exchange unit |
EP1555500A2 (en) * | 2004-01-13 | 2005-07-20 | Econ Export + Consulting Group GmbH | Heat exchanger |
FR2939879A1 (en) * | 2008-12-15 | 2010-06-18 | Vitherm | THERMAL EXCHANGER WITH WELDED PLATES |
WO2013189587A1 (en) * | 2012-06-18 | 2013-12-27 | Api Schmidt-Bretten Gmbh & Co. Kg | Plate heat exchanger |
WO2014085874A3 (en) * | 2012-12-05 | 2014-09-12 | Polyvision, Naamloze Vennootschap | Spiral or helical counterflow heat exchanger |
US10054374B2 (en) | 2008-07-09 | 2018-08-21 | Euro-Apex B.V. | Heat transfer cell for heat exchanger and assembly, and methods of fabricating the same |
CN111433551A (en) * | 2017-12-05 | 2020-07-17 | 舒瑞普国际股份公司 | Heat exchanger |
KR102552970B1 (en) * | 2023-01-09 | 2023-07-10 | 이형규 | A heat exchanger |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4666142B2 (en) * | 2005-03-08 | 2011-04-06 | 株式会社ゼネシス | Heat exchanger outer shell structure |
JP5486841B2 (en) * | 2009-05-21 | 2014-05-07 | 三菱電機株式会社 | Delon cup type heat exchanger |
CN102192676B (en) * | 2010-03-16 | 2013-08-07 | 四平艾维能源科技有限公司 | All-welded plate-type heat exchanger |
SE534915C2 (en) * | 2010-06-18 | 2012-02-14 | Alfa Laval Corp Ab | Plate heat exchanger and method for manufacturing a plate heat exchanger |
KR102524261B1 (en) * | 2016-11-29 | 2023-04-24 | 엘지전자 주식회사 | Regenerator |
KR101965245B1 (en) * | 2017-07-04 | 2019-04-03 | 박덕열 | Plate heat exchanger having function of preventing acid dew point |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2959401A (en) * | 1957-11-27 | 1960-11-08 | Modine Mfg Co | Plate-fin type heat exchanger and method of making the same |
US3274672A (en) * | 1963-06-04 | 1966-09-27 | Air Preheater | Method of making a heat exchanger |
FR2317617A1 (en) * | 1975-07-11 | 1977-02-04 | Alusuisse | THERMAL EXCHANGER IN THIN SHEETS |
FR2318398A1 (en) * | 1975-07-18 | 1977-02-11 | Munters Ab Carl | PROCESS FOR REALIZING A HEAT EXCHANGE BODY FOR RECOVERY EXCHANGERS |
FR2392349A1 (en) * | 1977-05-27 | 1978-12-22 | Pfaudler Werke Ag | Enamel lined heat exchanger tubes - having enamel on outside only at ends which have hexagonal shape of larger cross=section, for use with corrosive media |
JPS57149083A (en) * | 1981-03-09 | 1982-09-14 | Toshiba Corp | Production of panel type heat radiatior |
EP0165179A1 (en) * | 1984-04-19 | 1985-12-18 | Vicarb | Plate-type heat exchanger and plate for its manufacture |
DE4031436A1 (en) * | 1990-10-04 | 1992-04-09 | Bavaria Anlagenbau Gmbh | Laminar construction heat exchanger - comprises stack of plates welded together in pairs to form flow tubes, held in position by outer slotted plates and channel sections |
-
1992
- 1992-04-16 NL NL9200698A patent/NL9200698A/en not_active Application Discontinuation
-
1993
- 1993-04-15 JP JP12302993A patent/JPH0611290A/en active Pending
- 1993-04-15 EP EP93201092A patent/EP0566208A1/en not_active Withdrawn
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2959401A (en) * | 1957-11-27 | 1960-11-08 | Modine Mfg Co | Plate-fin type heat exchanger and method of making the same |
US3274672A (en) * | 1963-06-04 | 1966-09-27 | Air Preheater | Method of making a heat exchanger |
FR2317617A1 (en) * | 1975-07-11 | 1977-02-04 | Alusuisse | THERMAL EXCHANGER IN THIN SHEETS |
FR2318398A1 (en) * | 1975-07-18 | 1977-02-11 | Munters Ab Carl | PROCESS FOR REALIZING A HEAT EXCHANGE BODY FOR RECOVERY EXCHANGERS |
FR2392349A1 (en) * | 1977-05-27 | 1978-12-22 | Pfaudler Werke Ag | Enamel lined heat exchanger tubes - having enamel on outside only at ends which have hexagonal shape of larger cross=section, for use with corrosive media |
JPS57149083A (en) * | 1981-03-09 | 1982-09-14 | Toshiba Corp | Production of panel type heat radiatior |
EP0165179A1 (en) * | 1984-04-19 | 1985-12-18 | Vicarb | Plate-type heat exchanger and plate for its manufacture |
DE4031436A1 (en) * | 1990-10-04 | 1992-04-09 | Bavaria Anlagenbau Gmbh | Laminar construction heat exchanger - comprises stack of plates welded together in pairs to form flow tubes, held in position by outer slotted plates and channel sections |
Non-Patent Citations (1)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 6, no. 253 (M-178)11 December 1982 & JP-A-57 149 083 14 September 1982 * |
Cited By (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6460614B1 (en) | 1997-12-02 | 2002-10-08 | De Dietrich Process Systems | Substantially flat enamelled metal heat exchanger |
GB2361991A (en) * | 2000-03-10 | 2001-11-07 | Smiths Group Plc | A Heat Recovery Unit |
FR2806469A1 (en) * | 2000-03-20 | 2001-09-21 | Packinox Sa | METHOD FOR ASSEMBLING THE PLATES OF A BEAM OF PLATES AND BEAM OF PLATES MADE BY SUCH A PROCESS |
WO2001071268A1 (en) * | 2000-03-20 | 2001-09-27 | Packinox | Method for assembling the plates of a plate pack and resulting plate pack |
US6802365B2 (en) | 2000-03-20 | 2004-10-12 | Packinox | Method for assembling the plates of a plate pack and resulting plate pack |
EP1323998A2 (en) * | 2001-12-27 | 2003-07-02 | Xenesys Inc. | Heat exchange unit |
EP1323998A3 (en) * | 2001-12-27 | 2006-07-05 | Xenesys Inc. | Heat exchange unit |
EP1555500A2 (en) * | 2004-01-13 | 2005-07-20 | Econ Export + Consulting Group GmbH | Heat exchanger |
EP1555500A3 (en) * | 2004-01-13 | 2007-03-28 | Econ Export + Consulting Group GmbH | Heat exchanger |
US10054374B2 (en) | 2008-07-09 | 2018-08-21 | Euro-Apex B.V. | Heat transfer cell for heat exchanger and assembly, and methods of fabricating the same |
WO2010076477A1 (en) * | 2008-12-15 | 2010-07-08 | Vitherm | Heat exchanger with welded plates |
US9134073B2 (en) | 2008-12-15 | 2015-09-15 | Vitherm | Heat exchanger with welded plates |
FR2939879A1 (en) * | 2008-12-15 | 2010-06-18 | Vitherm | THERMAL EXCHANGER WITH WELDED PLATES |
WO2013189587A1 (en) * | 2012-06-18 | 2013-12-27 | Api Schmidt-Bretten Gmbh & Co. Kg | Plate heat exchanger |
WO2014085874A3 (en) * | 2012-12-05 | 2014-09-12 | Polyvision, Naamloze Vennootschap | Spiral or helical counterflow heat exchanger |
BE1021647B1 (en) * | 2012-12-05 | 2015-12-22 | Polyvision, Naamloze Vennootschap | HEAT EXCHANGERS |
US10094621B2 (en) | 2012-12-05 | 2018-10-09 | Polyvision, Naamloze Vennootschap | Spiral or helical counterflow heat exchanger |
CN111433551A (en) * | 2017-12-05 | 2020-07-17 | 舒瑞普国际股份公司 | Heat exchanger |
CN111433551B (en) * | 2017-12-05 | 2022-01-21 | 舒瑞普国际股份公司 | Heat exchanger |
US11867469B2 (en) | 2017-12-05 | 2024-01-09 | Swep International Ab | Heat exchanger |
KR102552970B1 (en) * | 2023-01-09 | 2023-07-10 | 이형규 | A heat exchanger |
Also Published As
Publication number | Publication date |
---|---|
JPH0611290A (en) | 1994-01-21 |
NL9200698A (en) | 1993-11-16 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP0566208A1 (en) | Plate type heat exchanger, and method of manufacturing it | |
CA1205457A (en) | Floating plate heat exchanger | |
US3829945A (en) | Method of producing a heat exchanger | |
US4688631A (en) | Plate heat exchanger | |
JP2630504B2 (en) | Flat plate heat exchanger | |
RU2557964C2 (en) | Plate-type heat exchanger | |
US2869835A (en) | Heat exchanger | |
CA1120920A (en) | Apparatus for reinforcement of thin plate, high pressure fluid heat exchangers | |
KR20100102613A (en) | Heat exchanger | |
RU2565142C2 (en) | Plate type heat exchanger containing external heat-exchange plates with improved device for connection to end panels | |
KR102299274B1 (en) | Plate heat exchanger and method for manufacturing a plate heat exchanger | |
GB1565912A (en) | Corrugated sheet heat exchanger | |
US4359087A (en) | Plate heat exchanger | |
US3633661A (en) | Crossflow plate-type heat exchanger with barrier space | |
GB2235040A (en) | Plate heat exchangers | |
KR100808334B1 (en) | Heat-transfer plate for heat exchanger | |
CN104132567B (en) | Plate, plate bundle and welded plate type heat exchanger | |
JP3594606B2 (en) | Plate heat exchanger | |
DE69908046D1 (en) | heat exchangers | |
KR20220158722A (en) | plate heat exchanger | |
KR20210065990A (en) | plate for plate heat exchanger | |
JPH1183379A (en) | Heat exchanger | |
FI64718B (en) | PLATTVAERMEVAEXLARE | |
CN204007247U (en) | Plate, plate bundle and welded plate type heat exchanger | |
KR0136278Y1 (en) | Protection apparatus for heat exchanger |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE CH DE DK ES FR GB GR IE IT LI LU MC NL PT SE |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 19940421 |