Abstract: Plate (1) intended to form a partition between two fluids circulating inside a welded heat exchanger, the plate (1) having a plurality of undulations (2) characterised in that all or part of the undulations (2) has, on at least one upper crest line (3), at least one preferred contact area (4) that has a height above a nominal height of the undulations (2) of the plate (1), the at least one preferred contact area (4) being intended to come into contact with a lower crest line of an undulation of another plate provided above the plate (1) and to be deformed when the exchanger is manufactured.

Abstract: A method of optimizing a chemical reaction in a plate-type open reactor, the method consisting in: establishing a dynamic model of the reactor for a given reaction on the basis of a model of the reactor and its heat exchanges; applying an integration software tool to the dynamic model in order to solve the above-mentioned equations; determining and optimizing a set of dimension and/or operation parameters of the reactor on the basis of evaluating targets to be achieved, constraints to be complied with, and variable data for the reactor and/or the reaction; building a plate reactor of the said type accordingly to the set of optimized parameters; and doing measurements of physical parameters during the execution of said reaction in the built reactor, for validating its operation.

Abstract: A heat exchanger, having a circular housing having a first and a second end plate (6, 7), where the first end plate is provided with an inlet port (2) and the first or the second end plate is provided with an outlet port (3), and further having a plurality of corrugated heat exchanger plates (10, 11) having ridges (12) and grooves (13), where the heat exchanger plates are fixedly attached to each other, such that a first flow channel is created between the heat exchanger plates, and where the heat exchanger further has a plurality of compensation plates (20) positioned between the heat exchanger plates and at least one of the end plates. The advantage of this heat exchanger is that it reduces the stress imposed on the inlet and outlet regions of the heat exchanger due to thermal cycling.

Abstract: A heat exchanger comprises a set of plates defining between them circuits for a fluid flowing alternately via seals mounted between each pair of two adjacent plates. Each plate including at least one guiding cut formed at least at one of the ends thereof for guiding each plate inside a frame. The exchanger also includes between each pair of two adjacent plates, and in proximity to the guiding cut, at least one strut to be compressed and in contact with the two adjacent plates. Each strut has, before compression, a thickness at least equal to that of the seal.

Abstract: A device for exchange and/or reaction between at least two fluids is taught and described herein comprising at least a first space of selected thickness and including side walls defining a first chamber provided with a central part at least partly recessed for a first fluid flow and at least a second chamber for a second fluid flow, the first and second chambers being separated by a first exchanging wall adapted to ensure exchange and/or reaction between fluids of thermal and/or mass transfer type.

Abstract: A condenser-type heat exchanger having a set of welded plates that together define fluid systems that interpenetrate each other comprises at least two modules of welded plates.

Abstract: The invention concerns a device for exchange and/or reaction between at least two fluids comprising at least a first spacer of selected thickness and including side walls defining a first chamber provided with a central part at least partly recessed for a first fluid flow, and at least a second chamber for a second fluid flow, the first and second chambers being separated by a first exchanging wall adapted to ensure exchange and/or reaction between fluids, of thermal and/or mass transfer type.

Abstract: A resistive heater comprises at least one heater chamber defined by walls, two of which are constituted by parallel conductive plates spaced apart by a selected distance. The chamber also has an inlet for introducing a fluid close to a first end of the plates and an outlet placed close to a second end of the plates, opposite from the first, for collecting the fluid after it has flowed between the plates, parallel thereto, and devices are provided to power the plates with electricity so that the fluid is heated in the chamber by the resistive effect while it is flowing parallel to the plates.

Abstract: Electric boiler for heat-transfer liquid (FC) comprising a set of plates (P) having corrugations on both their faces, and which include, in their corners, openings (3, 4, 5, 6) allowing circulation of fluid. Said assembly consists of at least one module comprising two stamped plates (P), the corrugations of which are in the same sense on both their faces between which at least one heater block (I) is inserted, within which heater block a resistance element (R) is embedded, being in the form of a block which also includes orifices (3, 4, 5, 6) as well as herringbone corrugations on both its faces (A) and (B).

Abstract: This plate heat exchanger with parallel and counterflow circulation of the heat-exchange fluids is constructed by stacking a determined number of ribbed plates (4) of the same size, clamped against one another between two flanges (1,2), said plates having openings (5,6,7,8) in their corners, defining, within the stack, supply and outlet channels respectively for the heat-exchange fluids.The plates are made of bulk machined graphite, previously impregnated with a waterproofing material, and in particular a resin.

Abstract: Gas/liquid heat exchanger with condensation.It is presented in the form of blocks juxtaposed (1) within an enclosure (2) and in which two series of channels (3,4) are pierced, these blocks (1) being disposed within an enclosure (2), the space between the enclosure (2) and the central column which the blocks form being separated into two chambers (6,7), connected respectively to the gaseous phase supply circuit (10) and the other to the circuit (14) for the evacuation of the condensates formed.

Abstract: The invention relates to a heat exchanger incorporating independent circuits, constituted by modular elements in the form of blocks maintained juxtaposed inside an enclosure defining independent chambers for each of the fluids. Each block presents superposed channels opening out alternately into the lateral fluid circulation chambers, these channels being defined by the space between the pressed plates, comprising edges turned back through 90.degree. alternately in opposite directions and which form, in each angle, a vertical edge enabling them to be fixed to the lateral walls defining the fluid circulation chambers. The plates are associated with one another by butt-welding of the ends of the bent edges and the vertical-edges.

Abstract: The invention relates to a process for initiating a reaction for the manufacture of synthetic hydrochloric acid, wherein two reactive gaseous chamical compounds, chlorine and hydrogen, are brought together. The molecules of at least one of said compounds are then excited by projection of a laser ray onto this reactive compound, wherein the laser ray is directed onto the zone where the two reactive compounds are brought together.