A compact heat exchanger and/or fluid mixing means comprises a bonded stack of plates, the stack comprising at least one group of plates, the group comprising one or more perforated plates ( 10) sandwiched between a pair of primary separator plates (40, 62, 64), characterised in that each perforated
A compact heat exchanger and/or fluid mixing means comprises a bonded stack of plates, the stack comprising at least one group of plates, the group comprising one or more perforated plates ( 10) sandwiched between a pair of primary separator plates (40, 62, 64), characterised in that each perforated plate (10) has perforations (14) arranged in rows across the plate in a first direction, with a land (16) between each adjacent pair of perforations (14) in a row and with ribs (18) between adjacent rows, the lands (16) forming barriers to flow in a first direction across the plate and the ribs (18) forming barriers to flow in a second direction across the plate, the second direction being normal to the first direction, the ribs (18) having vents ( 20) through a portion of their thickness, the vents (20) extending from one side of a rib (18) to the other side in the second direction, whereby flow channels are provided through the vents (20) and the flow channels lying between each adjacent pair of lands (16) provide a flow passage to cross the plates in the second direction, the passageways in the group of plates being separated from passageways in any adjacent group of plates by one of the separator plates (40).
대표청구항▼
The invention claimed is: 1. A heat exchanger or fluid mixing means comprising a bonded stack of plates, the stack comprising at least one group of plates, comprising one or more perforated plates (50) sandwiched between a pair of primary separator plates, each perforated plate has a plurality of p
The invention claimed is: 1. A heat exchanger or fluid mixing means comprising a bonded stack of plates, the stack comprising at least one group of plates, comprising one or more perforated plates (50) sandwiched between a pair of primary separator plates, each perforated plate has a plurality of perforations arranged in rows across the plate in a first direction, with a land between each adjacent pair of perforations in a row and with ribs (54) between adjacent rows, the lands forming barriers to flow in the first direction across the plate and the ribs forming barriers to flow in a second direction across the plate, the second direction being normal to the first direction, the ribs (54) having vents (56) through a portion of their thickness, the vents extending from one side of a rib to the other side in the second direction, whereby flow channels are provided through the vents and the flow channels defined by the perforations lying between each adjacent pair of lands provide a flow passage to cross the plates in the second direction, wherein a deposit of catalytic material is retained within the passageways of the said at least one group of plates. 2. A heat exchanger or fluid mixing means comprising a bonded stack of plates, the stack comprising at least one group of plates, comprising one or more perforated plates (50) sandwiched between a pair of primary separator plates, each perforated plate has a plurality of perforations arranged in rows across the plate in a first direction, with a land between each adjacent pair of perforations in a row and with ribs (54) between adjacent rows, the lands forming barriers to flow in the first direction across the plate and the ribs forming barriers to flow in a second direction across the plate, the second direction being normal to the first direction, the ribs (54) having vents (56) through a portion of their thickness, the vents (56) extending from one side of a rib (54) to the other side in the second direction, whereby flow channels are provided through the vents (56) and the flow channels defined by the perforations lying between each adjacent pair of lands provide a flow passage to cross the plates in the second direction, wherein the deposit of catalytic material is formed in the perforations of the perforated plate(s). 3. A heat exchanger or fluid mixing means according to claim 2, wherein the perforations of the perforated plates are elongate slots (52). 4. A heat exchanger or fluid mixing means according to claim 3, wherein the vent has a base surface and the deposit is formed in the slots (52) to a level with said base surface. 5. A heat exchanger or fluid mixing means according to claim 2, characterised in that the vents (56) are formed on one surface of their rib (54) to extend partially into the thickness of the rib (54). 6. A heat exchanger or fluid mixing means according to claim 5, wherein the vents (56) in adjacent pairs of ribs (54) are offset from each other. 7. A heat exchanger or fluid mixing means according to claim 6, characterised in that the vents (56) are formed normal to the direction of the rib (54).
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