WO1993017291A1 - Multi-disc heat exchanger - Google Patents
Multi-disc heat exchanger Download PDFInfo
- Publication number
- WO1993017291A1 WO1993017291A1 PCT/GB1993/000398 GB9300398W WO9317291A1 WO 1993017291 A1 WO1993017291 A1 WO 1993017291A1 GB 9300398 W GB9300398 W GB 9300398W WO 9317291 A1 WO9317291 A1 WO 9317291A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- disc
- plates
- pair
- corrugations
- plate
- Prior art date
Links
Classifications
-
- 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
- F28D11/00—Heat-exchange apparatus employing moving conduits
- F28D11/02—Heat-exchange apparatus employing moving conduits the movement being rotary, e.g. performed by a drum or roller
Definitions
- the present invention relates to a heat exchanger, to discs for use therein, and to a method of making such discs.
- each disc is hollow and communicates with a passage in the rotor for a heat exchange medium, such as steam, to pass to and from each disc.
- the discs are generally formed from a pair of annular stainless steel discs welded together at their outer edge and fixed to the rotor at their inner edge to be spaced one from another whereby the cross section of each disc is essentially a double cone.
- the plates are held together by at least two rings of stay bolts, perhaps even four, each ring generally having 36 bolts welded between the plates.
- a hollow disc for use in a heat exchanger comprising a pair of plates connected at their outer periphery and spaced apart adjacent their centres, each plate being corrugated annularly with at least one corrugation.
- the two plates are preferably held together by means of a single ring of stay bolts affixed to and between the plates.
- the corrugations may project externally of the disc. Alternatively they may project internally into the disc. In this latter case, the, one or both corrugations may have the internal surfaces of respective plates joined e.g. by welding at these points.
- a method of manufacturing a heat exchange disc comprising the steps of providing a pair of generally frustoconical rollers, one roller of said pair having at least one portion of increased diameter and the other of said pair having a corresponding portion of decreased diameter; providing a generally dish shaped annular disc of material; arranging said rollers so that their contact faces extend along a line generally at the same angle to horizontal as that between the base and the edge of the dished plate; and rotating at least one of said pair of rollers, whereby the disc is deformed to have at least one corrugation.
- a stay bolt for a hollow heat exchange disc comprising a stem having shoulder means adapted to contact respective interior surfaces of the disc around stay bolt holes in the plates forming the disc, to form a backing during subsequent welding.
- each stay bolt is preferably angled, one with respect to the other, at an angle which corresponds substantially to the angle between the plates of the disc .
- a heat exchanger comprising a plurality of hollow discs of substantially double conical cross-section into which a pressurised heat exchange medium may be fed and which may> be rotated in contact with a material to be treated, each of said discs comprising a pair of substantially annular plates each having at least one corrugation extending substantially concentrically about the plate, and a plurality of stay bolts arranged along a concentric circle at a median radius to connect the plates together.
- any or all of the above aspects may be used in combination.
- FIGURE 1 is an elevation of a disc embodying the invention
- FIGURE 2 is a part cross sectional view of the disc of Figure 1;
- FIGURE 3 is a side elevation of a stay bolt embodying the invention.
- FIGURE 4 is a . side elevation of a roller for use in the method of the invention.
- Figures 1 and 2 show a heat exchange disc. It is constructed from two annular discs 1 of stainless steel, approximately 8mm thick. These are joined together around their periphery by a fillet weld 2. At their interior periphery, i.e. around the central aperture 3, each plate is welded to a stainless steel tube 4, acting as a rotor axis, spaced one from another. In a heat exchanger, a plurality of such hollow discs are connected to the rotor axis along its length. Steam, possibly at a pressure of 6-7 bar is fed into one end of the rotor axis and thence through connecting holes into each disc. The assembly is rotated within a container for the material to be treated. The steam condenses within the discs and the water is directed back into the rotor axis.
- each plate 1 is corrugated annularly to improve its stiffness.
- the design of stay bolt has been improved. This enables discs to be used which have only thirty-two stay bolts.
- Each plate 1 is formed with two annular corrugations 5. In the embodiment shown, these extend externally of the general plane of the plate, but it is possible to make them internal. These increase the stiffness of the plates to such an extent that only one circle of thirty-two stay bolts 6 are required. They are located between the two corrugations and their design is shown more clearly in Figure 3.
- Each bolt 6 comprises a stem 7 and two shouldered heads 8.
- the heads 8 are angled one with respect to the other to correspond with the angle of the plates 1 of the disc 2. It is thus important that they are oriented correctly.
- Each head 8 comprises a shoulder 9 intended to contact an interior face of the plate 1.
- An angled head 10 is intended to fit within a hole in the plate. The weld material, when applied from the outside of the disc will fill the triangular cross section space and the shoulder 9 acts as a backing, helping to prevent coking. The joint thus formed is far less prone to failure than existing stay bolt welds.
- annular dished plate is rolled between a pair of shaped rollers.
- One of them, 11, is shown in Figure 4. The other corresponds in a reverse manner.
- Each roller has a generally frustoconical shape with sides angled to correspond to the angle the plate will assume when connected into a disc.
- the roller shown has two annular protruberances 12, which act to form the corrugations 5 when the plate is rolled between the roller 11 and the complementary roller (i.e. having corresponding annular grooves).
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
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB929204093A GB9204093D0 (en) | 1992-02-26 | 1992-02-26 | Multi-disc heat exchanger |
GB9204093.0 | 1992-02-26 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1993017291A1 true WO1993017291A1 (en) | 1993-09-02 |
Family
ID=10711079
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/GB1993/000398 WO1993017291A1 (en) | 1992-02-26 | 1993-02-26 | Multi-disc heat exchanger |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0581941A1 (en) |
GB (1) | GB9204093D0 (en) |
WO (1) | WO1993017291A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2002048628A1 (en) * | 2000-12-12 | 2002-06-20 | Atlas-Stord Denmark A/S | Annular drying element, method and use hereof and drying apparatus |
WO2003014641A1 (en) * | 2001-07-26 | 2003-02-20 | Stord Bartz As | Rotary disc-type heat-exchanger |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3777810A (en) * | 1972-08-24 | 1973-12-11 | Strong Mfg Co Scott | Dryer |
FR2228212A1 (en) * | 1973-05-01 | 1974-11-29 | Atlas As | |
GB2062837A (en) * | 1979-10-15 | 1981-05-28 | Pozzi Leopoldo Spa Cost Mecc | Rotary drum heat exchanger |
WO1989006337A1 (en) | 1987-12-28 | 1989-07-13 | Henrik Ullum | Device for heating and/or drying |
DE3838640A1 (en) * | 1988-11-15 | 1990-06-13 | Wulff Maschf Appbau Gmbh | Disc agitator in a continuously operating drier |
-
1992
- 1992-02-26 GB GB929204093A patent/GB9204093D0/en active Pending
-
1993
- 1993-02-26 EP EP19930904262 patent/EP0581941A1/en not_active Withdrawn
- 1993-02-26 WO PCT/GB1993/000398 patent/WO1993017291A1/en not_active Application Discontinuation
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3777810A (en) * | 1972-08-24 | 1973-12-11 | Strong Mfg Co Scott | Dryer |
FR2228212A1 (en) * | 1973-05-01 | 1974-11-29 | Atlas As | |
GB2062837A (en) * | 1979-10-15 | 1981-05-28 | Pozzi Leopoldo Spa Cost Mecc | Rotary drum heat exchanger |
WO1989006337A1 (en) | 1987-12-28 | 1989-07-13 | Henrik Ullum | Device for heating and/or drying |
DE3838640A1 (en) * | 1988-11-15 | 1990-06-13 | Wulff Maschf Appbau Gmbh | Disc agitator in a continuously operating drier |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2002048628A1 (en) * | 2000-12-12 | 2002-06-20 | Atlas-Stord Denmark A/S | Annular drying element, method and use hereof and drying apparatus |
WO2003014641A1 (en) * | 2001-07-26 | 2003-02-20 | Stord Bartz As | Rotary disc-type heat-exchanger |
Also Published As
Publication number | Publication date |
---|---|
GB9204093D0 (en) | 1992-04-08 |
EP0581941A1 (en) | 1994-02-09 |
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