Abstract: An installation for filling cylinders with gas whose nature is in accordance with a predetermined specification, it comprises a plurality of sources of supply (18, 20), a network of control valves (12), selectively connecting the outlet of each supply gas source to the cylinders, and a unit (16) for controlling the network of valves adapted to control the condition of the valves. The control unit (16) comprises a unit (60) for inputting into a program constituted by a sequence of procedures, each procedure being an elemental task that can be performed by the valves under the control of the control unit (16). It moreover comprises a unit (62) for processing the successive procedures constituting the program. They are adapted to control the network of valves (12) by the sequential performance of the elemental tasks described successively in the sequence of operations.

Abstract: Provided is a safe method for qualifying the cylinder valves on gas cylinders, which method can also clean the cylinder valve when necessary. Compressed gas residing in a gas cylinder is discharged through the flow path of a cylinder valve with the cylinder valve on the gas cylinder in an open position. During this process ultrasound vibrations from the generator are applied to the cylinder valve and the number of particles in the outflowing gas is counted by a detector. The cleanliness of the cylinder valve is evaluated based on the detected value of the number of particles provided by the detector. When the detected value exceeds a standard value, the application of ultrasound vibrations, counting of the number of particles, and evaluation of the cleanliness are repeated until the detected value reaches or falls below the standard value.

Abstract: The invention relates to an auxiliary apparatus for controlling at least one electrically operated functional device (3), which is designed to replace a main unit (5) for controlling the said at least one functional device (3), and which can be plugged into terminals (7, 9, 11) for connecting the latter that are provided for this purpose. The said apparatus (1) comprises, for each functional device (3), a manually operated switch (12) interposed between a line (14) for delivering an electric control potential, this line being intended to be connected to an associated supply terminal (9), and an associated line (16) for transmitting the electric control potential to the said at least one functional device (3).

Abstract: In the process of the invention, an ammonia synthesis mixture and carbon monoxide are produced. The hydrogen is purified in a nitrogen-washing column (61). The carbon monoxide is recovered cryogenically from a first liquid fraction (51) collected at the base of the said washing column (61), in a medium-pressure stripping column (62), then in a low-pressure distillation column (63). A second liquid fraction (52) is drawn from a position intermediate between the base and head of the washing column (61).

Abstract: A process is provided for treating food products in order to reduce or eliminate the detrimental effects of the presence of oxygen in the atmosphere which is in contact with the products and, more particularly, the external surface of the products. A non-zero quantity of oxygen is extracted from the atmosphere by implementing a solid electrolyte which is an O2− ion conductor and is essentially impermeable to the gases. The invention has applicability to preserving frying oil baths.

Abstract: Process for the production of a final gaseous mixture comprising a carrier gas, an oxidizing gas and a silane, with a predetermined content of each of the three gaseous components, comprising the steps of: a) preparing a primary gaseous mixture comprising a neutral gas and the silane, wherein the silane is present in the primary gaseous mixture at a content below a self-ignition limit of that particular silane in air; b) providing a first gas stream, comprising the carrier gas and a controlled residual content of the oxidizing gas; c) preparing the final mixture according to one or other of the following two procedures, as a function of the residual content of oxidizing gas in the gas stream comprising the carrier gas: P1: mixing the first gas stream with a second stream of the primary gaseous mixture and with a third stream of the oxidizing gas in proportions which make it possible to obtain the final mixture, the addition of the oxidizing gas stream being carried out under dynamic conditions; P2: mixin

Abstract: An apparatus for the cryogenic separation of a mixture containing at least hydrogen, carbon monoxide and methane comprises two phase separators (A, H), two heat exchangers (D, K) and two stripping columns (B, I). The mixture cooled in the first exchanger is sent into a phase separator and at least some of the condensed fraction is sent into the first stripping column (B). At least some of the head gas from the stripping column is sent into the second phase separator (H) and the liquid produced is sent into the head of the second stripping column (I). The base liquid from the first stripping column may be sent into a purification column (C).

Abstract: In this process, the fluid is compressed (at 2) in the gaseous state to a pressure called the high pressure, the fluid is precooled on passing through a precooling first stage (3), cooled and liquefied, at least partially, on passing through a cooling second stage (4), at least some of the cooled and expanded fluid is collected in a tank (5) for storing the fluid in a two-phase state and some of the gas phase is sent back via a warming line (7) from the tank through the first and second stages. The precooled fluid is divided into at least two separate streams which are expanded in parallel in the second stage, mainly a first stream intended to supply, at least partly, a first source of refrigeration (at 8), and at least a second stream, one of these streams being partially liquefied separately (at 27) on passing through the second stage (4). The process is applicable to the cooling of superconducting components using helium.

Abstract: Burner firing method and device are presented where an oxidizing oxygen-fuel burner is fired at an angle to the reducing air-fuel burner flame to reduce overall NOx emissions from high temperature furnaces. The oxidizing oxy-fuel burner stoichiometric equivalence ratio (oxygen/fuel) is maintained in the range of about 1.5 to about 12.5. The reducing air-fuel burner is fired at an equivalence ratio of 0.6 to 1.00 to reduce the availability of oxygen in the flame and reducing NOx emissions. The oxidizing flame from the oxy-fuel burner is oriented such that the oxidizing flame gas stream intersects the reducing air-fuel flame gas stream at or near the tail section of the air-fuel flame. The inventive methods improve furnace temperature control and thermal efficiency by eliminating some nitrogen and provide an effective burnout of CO and other hydrocarbons using the higher mixing ability of the oxidizing flame combustion products.

Abstract: The cycle employed is of the transatmospheric type with the use of a production buffer tank (C1), and with a purge/elution phase close to the low pressure in which gas output by another adsorber in the first cocurrent decompression phase is introduced in countercurrent into the adsorber (A, B) and, simultaneously, the countercurrent pumping is continued. During the production step, the oxygen produced is also sent into an auxiliary tank (C2), and the gas contained in this auxiliary tank is, with regard to the adsorber, used solely during a fraction of the pressurization phase of the adsorber.

Abstract: In this installation (1) for the distillation of air in a double column, the low pressure column and the medium pressure column are disposed side by side and the base of the low pressure column (3) is above the base of the medium pressure column (2). The low pressure column is disposed above an element for confining a cryogenic fluid which can be a mixing column (5), an argon column, a column operating at a pressure intermediate the medium pressure and the low pressure, a storage (32) or an exchanger.

Abstract: A process for in-line partial or complete freezing of products inside an enclosure comprising the steps of: introducing the products into the enclosure on a conveyor comprising an upper run and a lower run, the upper run including an upper face and a lower face; impregnating the conveyor with a cryogenic liquid by spraying the cryogenic liquid on the lower face of the upper run of the conveyor; bringing the product into contact with the conveyor and partially or completely freezing the product by heat transfer between the product and the cryogenic liquid retained in the structure of the conveyor; monitoring the impregnation of the conveyor; regulating the spraying of cryogenic liquid depending on the result of the monitoring. An apparatus for carrying out the process is also disclosed.

Abstract: The present invention provides a means for preventing, in a cylinder cabinet, the improper securing of a gas container due to human error or the like. The cylinder cabinet comprises a securing means for securing a gas container therein, a control means for managing and controlling a series of steps for carrying out a gas container-exchange operation, and a detection means for detecting whether the gas container is properly secured. When the detection means detects that the new container is improperly secured, the control means places the gas container-exchange operation on stand-by until the container is properly secured.

Abstract: The installation comprises, along a vertical frame (1), locations for gas cylinders, these locations being partially defined by a rack that can be used for transporting the cylinders (7), each location comprising, on the frame, a holding device (9, 10) that can be swung between a lockable closed configuration preventing the insertion or extraction of a cylinder, and an open configuration.

Abstract: The invention concerns a hygienic agent for use in hemodialysis. This hygienic agent based on peracetic acid has an aqueous solution containing 6 to 8 weight % hydrogen peroxide, 0.1 to 1 weight % peracetic acid and 2 to 10 weight % acetic acid. Application to the disinfection, sterilization of dialysis generators, dialyzers, hemofilters and hemodialyzers and circuits of water treatment for hemodialysis.

Abstract: A process for decolorizing, sanitizing and deodorizing a food product with ozone. The food product and water are mixed to form an initial solution and supplied to a pumping device to pressurize the solution. An ozone containing gas is injected into the initial solution in order to allow the treatment of the food product, without the occurrence of liquid/gas demixing. The apparatus includes a pumping device for pressurizing the solution, a contactor into which the pressurized solution is fed, a source of ozone, and at least one injector for injecting ozone into the solution.

Abstract: Combustion process in a furnace comprising a floor on which a charge to be heated is placed, and a roof lying above the charge, in which process the combustible fluid and the oxidizer fluid are injected separately between the surface of the charge and the roof, characterized in that the oxidizer and the fuel are injected at two different levels and in that the ratio of the impulsive forces (m.sub.2.v.sub.2 /m.sub.1.v.sub.1) of the combustible and oxidizer fluids is greater than or equal to approximately 1/3, m.sub.1 being the mass flow rate of the top fluid and v.sub.1, its velocity of injection into the furnace, m.sub.2 being the mass flow rate of the bottom fluid and v.sub.2 its velocity of injection into the furnace.

Abstract: An oxy-burner having a back-up firing system includes an oxidant conduit coupled to an oxidant injector nozzle. A primary oxygen line is coupled to the oxidant conduit and transports oxygen into the oxidant conduit. An auxiliary air ejector is coupled to the oxidant conduit and is configured to receive a motive fluid and to entrain ambient air and force the entrained air into the oxidant conduit. In operation, upon detecting a disruption in the primary oxygen supply, a motive fluid is supplied to the auxiliary air ejector. The motive fluid injected by the auxiliary air ejector entrains ambient air sufficient to either continue operation of the oxy-burner, or provide cooling air to the oxy-burner in the event that the burner is shut down. Upon restoring the primary oxygen supply, the back-up oxy-burner system can be deactivated and the oxy-burner return to standard operation.

Abstract: In an air distillation apparatus having a main heat exchanger 7 for cooling down feed air, a rectification column 9S comprising a rectifying portion 13 for separating the thus-cooled feed air to an oxygen-enriched component and a nitrogen component and a condenser 35S for partially condensing the latter, and a liquid nitrogen storage tank 31S for supplying liquid nitrogen by way of a supply valve V3, anda transport route 18 for transporting an oxygen-enriched liquid flowing down from said rectifying portion 13 to the bottom into said condenser 35S, the said oxygen-enriched liquid is not reserved at the bottom of the column.

Abstract: The combined installation comprises at least one metal production unit (II), including at least one, and typically a series of metal production or treatment units (1-6), and at least one air gas separation unit (III) including at least one outlet for at least one air gas (14-18), the units being supplied with compressed air with a low water vapor content by a common compressed air production unit (I), and with at least one of the gas outlets (14-18) from the separation unit (III) connected to at least one of the devices (1-6) of the production unit, to supply the latter with gas.