Abstract: The invention relates to an apparatus for scrubbing with water a continuous flow of charged gas, the apparatus including a scrubbing chamber; an inlet via which the scrubbing water is fed into the scrubbing chamber; a scrubbing throat for mixing the scrubbing water with the charged gas in the scrubbing chamber; a removal device for removing the scrubbing water and the collected particles; and a removal device for removing the continuous flow of at least partially scrubbed gas.

Abstract: A conveyor for detachable skid platforms includes a conveying path defining a conveying direction, an endless drive transporter, and hangers associated with the endless drive transporter, and defining a suspension direction and a lateral direction that is perpendicular to the plane defined by the suspension direction and by the conveying direction, each of the hangers having a free end with a loading mechanism designed to co-operate with a complementary loading mechanism on a skid platform supporting an object to be conveyed. All of the hangers are associated with the endless drive transporter of a single overhead transporter.

Abstract: A painting installation has an enclosure and a perforated floor. Air flows downwards inside the enclosure and is mixed with a liquid. Excess paint is extracted from the resulting mixture of the liquid plus excess paint particles from the air. At the same time, the inside of the enclosure and the perforated floor can be washed with water, which is collected separately from the liquid mixture.

Abstract: Procedure for the denaturation of paints collected in painting booths and comprising a cleansing apparatus in which the air laden with paint droplets is placed in contact with a fluid to which is added a powder selected from phenolic or polyisocyanate powders.Applications to the denaturation of paints in painting booth installations.

Abstract: A device for purifying contaminated gas, such as air drawn from an automobile painting tunnel and containing a mist of paint particles, includes an upper water feed orifice 1 connected to a lower flow channel 4 by an intermediate channel 3 which diverges progressively from top to bottom. A horizontal, transverse wall 8 is positioned beneath the feed orifice at a downstream section of the intermediate channel. Water falling against the wall splashes out in a curtain of droplets through which the air must pass, with the paint particles thus being entrained in the droplets and removed from the air flow. The low divergence angles of the intermediate channel ensures the continuous wetting of its walls to prevent clogging.

Abstract: A process is provided for denaturing paints which are collected in paint rooms of the type comprising a scrubber in which air charged with droplets of paint is brought into contact with a scrubbing liquid. An additive in the form of an expanded polyurethane powder is included in the scrubbing liquid. The apparatus includes an arrangement for injecting the expanded polyurethane powder into the scrubbing liquid at the top of the scrubber.

Abstract: A thermoelectric module comprises an odd number of thermoelements (1a, 2a, 1b) connected electrically in series and disposed thermally in parallel. The electrical current flowing through a heat exchanger (9) is conducted into the module by metallic members (8a, 8b) and by first and second types of connectors (4a, 4b and 6a, 6b).

Abstract: A device is provided for scrubbing a polluted gas in which this gas passes through at least one sheet of a scrubbing liquid. The device comprises trickle walls (7) which together define a first opening (8), a first transverse wall (12) disposed beneath the first opening, and a trickle passage with a vertical axis, surrounding the first transverse wall, and limited by two confining walls (10) attached to the underside of the trickle walls on either side of the first opening. Inside the trickle passage, under the first transverse wall (12), further walls (15) are arranged defining a second opening (16), with a second transverse wall (17) being disposed beneath the second opening.

Abstract: The invention provides an installation for injecting a powdery material, particularly an adsorbent material, into a contact column--as a rule vertical--through which flows a stream of gas, more especially gas laden with polluting effluents which it is desired to fix on said material, this installation comprising means opening into the column for injecting fresh material and for injecting recycled material, that is to say material already having served for the same purpose, characterized in that said means comprise a number of nozzles (2) for injecting recycled material, spaced apart about at least one nozzle (1) for injecting fresh material, these nozzles being disposed in the column (3 or 4).

Abstract: Thermoelectric installation of the "heat pump" type, in which the thermoelements 1 and the exchangers 2 and 3 are stacked to form columns, these assembled to form a rack.The rows of exchangers 2 and 3 demarcate two conduits for the circulation of a hot fluid and a cold fluid. These conduits are situated outside the stacking axes of the columns, so that adjacent exchangers can turn in relation to each other. The thermoelements and the exchangers are in contact by at least one cylindrical or spherical profile surface.This assembly allows proper tightening of the columns and therefore good contact between exchanger and thermoelement without destruction of the thermoelements.

Abstract: The installation comprises a blowing chamber (1) in which takes place the heat treatment of the product (2) and a recovery chamber (5) surrounding this blowing chamber (1). One at least of the two horizontal walls of the recovery chamber (5) is formed so as to present, on the outside, a flattened outer duct (6) through which the treatment gas is admitted into the recovery chamber (5) and, on the inside, a flattened inner duct (7) through which a part of the treatment gas is discharged from the recovery chamber (5).

Abstract: The invention concerns a process and device for molding and drying objects made of fibrous materials.The device comprises a cylinder 12, rotating about its longitudinal axis, having a row of porous molds 18 along the lengths of said cylinder's lateral faces, partially dipping into a vat 10 maintained with a constant level of fibrous product paste made of an appropriate liquid, a tubule 20 which connects the interior of the cylinder with a source of vacuum so as to create a partial vacuum therein, said cylinder 12 surrounded on its entire lateral surface free between paste vat 10 and removal device 22 by an arrangement of insulating walls 42 which define with cylinder 12 and vat 10 an enclosure 44 into which opens passageway 46 conveying hot air, said hot air being dwarfed from the extraction of air from a dryer.The present invention notably applies to the formation of egg boxes.

Abstract: A thermo-electric installation comprising a first network of hot tubes extending between two ends disposed in parallel relation and in which flows a hot fluid, a second network of cold tubes, extending between two ends, disposed in parallel relation and in a plane parallel to the plane of the hot tubes, and in which flows a cold fluid, thermo-elements mounted between said hot tubes and said cold tubes, at least two mechanical connection structures, called hot structures, connecting the hot tubes together, respectively towards their two ends, these two hot structures being independent of the cold tubes, at least two mechanical connection structures, called cold structures, connecting together the cold tubes, respectively towards their two ends, these two cold structures being independent of the hot tubes, and fixing devices, for firmly connecting together the hot structures and the cold structures, situated at the same end.

Abstract: A reciprocating drive system moves a body of defined inertia, such as a carriage supporting electrostatic spraying means, at full speed between two points at which the direction of movement is reversed. The drive system includes an electric motor with polyphase stator windings and a squirrel cage rotor. Transducers responsive to the arrival of the moving body at the aforementioned points produce output signals controlling a phase switching system which reverses the direction of rotation of the motor. Reversal of the motor torque reverses the direction of movement of the moving body within a given travel and within a given time interval to full speed in the opposite direction. A stator current limiter provides positive coupling in an operative condition and no coupling in an inoperative condition with the motor running at full speed. The motor is selected so that the inertia of its rotor closely matches that of the moving body.

Abstract: A washing device is provided which comprises at least one inclined wall or floor defining at least one orifice therein, means for causing a washing liquid to flow over the upper side of this wall, means for causing the polluted gas to flow from top to bottom of the device, at least one transverse wall situated below the orifice, and a flow channel having a vertical (or substantially vertical) axis surrounding the transverse wall. This device further comprises a connecting channel whose upper end terminates at the orifice, which has a downwardly divergent shape, and whose lower end is connected to the flow channel.

Abstract: A heat exchanger for a thermo-electric installation, comprising thermo-elements mounted between a hot wall and a cold wall, including, on the one hand, two base plates each forming or supporting a hot or cold wall and, on the other hand, a plurality of heat exchange surfaces extending between these two base plates. Each heat exchange surface is formed by an homogeneous one-piece bar.

Abstract: The invention relates to denaturation compositions for waterbase paints. These compositions are constituted by aqueous solutions containing effective amounts of at least one sulphate of iron (II), of magnesium or of manganese. To control the precipitation conditions of the denatured paint, these solutions may also contain a surface active agent which is a polyether of the form ##STR1## in which R is an alkyl, aryl, aryl-alkyl or alkyl-aryl group, containing at least 10 carbon atoms, and n and p are whole numbers of which one may be zero, n+p being comprised between 12 and 100.

Abstract: The invention relates to filtration apparatus and to a process for a filtration installation comprising several filtration cells equipped with at least one filtering element through which passes a current of dust-laden gas, this process consisting in isolating the filtration cell to be declogged, then in proceeding with declogging the filtering element(s) of this cell, and wherein further, after having isolated the filtration cell and before proceeding with the declogging thereof, it is scavenged by a counter-current of an inert gas, this counter-current scavenging being carried out under conditions such that the inert gas completely renews the atmosphere of this cell, without causing the layer of dust deposited on the upstream face of the filtering element(s) of said cell to be detached.

Abstract: The invention relates to an apparatus and a declogging process for filtration installation for dust-laden gases presenting reducing properties, consisting in taking dust-free gas at the outlet of the filtration installation, oxidizing this gas and using the gaseous mixture resulting from this oxidization to declog the filtering element(s) of said installation.

Abstract: A process for treating smoke from steel plants coming from blast furnaces, electric furnaces, converters and cupola furnaces.The process of the invention consists first of all in separating, when hot, the iron and iron oxide dust from the smoke by contact with solid particles, then in cooling this smoke to solidify the non-ferrous metal vapors which they contain, then finally in separating the solidified non-ferrous metals.It is possible to recover for a smaller cost, on the one hand, the iron and iron oxide dust and, on the other hand, the non-ferrous metals in solid form. Heat may also be recovered.