Abstract:
A completely biological method for removing a first group of micropollutants of pharmaceutical origin and a second group of micropollutants of pharmaceutical origin from raw wastewater includes: providing a first buffer tank upstream of a bioreactor; providing a moving bed membrane bioreactor (MB-MBR) for developing biomass growth both on a fixed support and in suspension in a form of flocs, and on mobile supports, the bioreactor obtaining an effluent with a COD concentration of organic matter of less than 50 mg l−1 and a total nitrogen concentration of less than 15 mg l−1; providing a biofiltration tank, separate from the first buffer tank of the bioreactor, that includes one or more biologically activated carbon (BAC) columns containing activated carbon; supplying the first buffer tank upstream of the bioreactor with raw wastewater containing micropollutants of pharmaceutical origin; pretreating the wastewater by passing the wastewater through a fine mesh sieve.
Abstract:
A method for controlling surface reactions on a steel strip running through a furnace includes, successively, a first section, a second section, and a third section separated by a sealing element, an atmosphere in the second and third sections being oxidizing and reducing respectively, the method including: heating, in the first section, the steel strip to between 600 and 750° C., while causing the atmosphere therein to be slightly oxidizing and to include: an H2 content inferior to 2%; an O2 content inferior to 0.1%; an H2O or CO2, or H2O+CO2 content superior to 0.03%; a controlled dew point ranging from −50 to −15° C.; and a controlled concentration of CO+CO2 maintained below 2%. All percentages are expressed in terms of volume.
Abstract:
A condensing heat recovery steam generator (cHRSG) includes a main stack for an exhaust hot gas main flow, a bypass stack for allowing a fraction of exhaust hot gas to bypass the exhaust hot gas main flow, and a heat pump. The cHRSG includes a primary water circuit, a secondary water circuit, and a tertiary water circuit. The cHRSG additionally includes a feedwater line, a first heat exchanger for providing heat exchange between the feedwater line and the secondary water circuit, and a second heat exchanger for providing heat exchange between the primary water circuit and the tertiary water circuit. In the cHRSG, latent heat is partially recovered from said exhaust hot gas circulating in the bypass stack through the second heat exchanger and additional heat is extracted in the tertiary water circuit by said heat pump, contributing to a preheating performed in a preheater of the primary water circuit.
Abstract:
A remotely controlled electronic general switch in DC power electrical supply system(s), ensuring switching and control of current and supply voltage, has an electronic module. The module has a controller or processor connected (i) to the switching and measurement circuit, the controller and measurement circuit optionally being linked bidirectionally, the controller being configured such that, when it receives a voltage and current measurement of the measurement circuit, it is respectively able to verify whether the input voltage lies in a predetermined interval and to instruct current interruption by the switching circuit for a certain duration, as a function of the measured current value, and (ii) to the communication interface, the communication interface connected to the communication bus and controller optionally being linked bidirectionally, such that the controller can be programmed remotely. An addressing bus, connected to the controller, enables selection, from several systems, a particular supply system linked to the general switch.
Abstract:
An energy absorption device includes a support, a dissipating element mounted around the support and being operable to deform plastically under the effect of a shock, and balls mounted with a given pressure against the dissipating element and intended to deform the dissipating element. The support is provided with grooves, and the balls are mounted opposite the grooves of the support and are operable to deform the dissipating element along the length of the grooves.
Abstract:
The invention relates to an assembly consisting of a plurality of packaging bottles (1) for conditioning, storing and transporting radioactive bars or tubes, hereinafter called fagot assembly (2), wherein: said bottles (1) are identical and interchangeable; and said bottles are attached to each other in order to form a fagot or a bundle (2), by means of quick-fastening means (3), said fagot (2) comprising N bottles, N≧2; characterised in that said bottles (1) are formed from steel and are thicker at one of the two ends thereof, over a certain length.
Abstract:
A method for controlling and optimizing a transverse uniformity of a coating thickness on at least one side of a running metal strip in an industrial galvanization installation, the coating being deposited by hot dip coating in a pot containing a liquid metal bath, includes at least the steps of: heating the strip substrate to a temperature higher than a pot temperature; passing the strip through the bath by wrapping the strip around at least a first deflector roll or sink roll followed by at least one second deflector roll, the second deflector roll improving a flatness of the strip; wiping excess coating thickness carried away by the strip on one or both sides of the strip by wiping nozzles blowing a gas on the strip at an exit of the liquid metal bath; and measuring an actual distance profile between the nozzles and the strip.
Abstract:
A solar receiver heat transfer pressurized fluid system includes: a pressure relief valve; and a trapping device for separating liquid droplets from a pressurized gas released by the pressure relief valve and to capture the liquid droplets. The trapping device includes: a horizontal pipe; a liquid trap element extending from the horizontal pipe for catching separated liquid droplets; and a vertical exhaust pipe connected to the horizontal pipe substantially in a perpendicular manner and having an open end for discharging in atmosphere the pressurized gas released by the pressure relief valve. The horizontal pipe includes a first connection means for removably connecting at a first end to the pressure relief valve and a second connection means for removably connecting at a second end to the liquid trap element. The vertical exhaust pipe is connected to the horizontal pipe between the first end removably connectable to the pressure relief valve.
Abstract:
A completely biological method for removing a first group of micropollutants of pharmaceutical origin and a second group of micropollutants of pharmaceutical origin from raw wastewater includes: providing a first buffer tank upstream of a bioreactor; providing a moving bed membrane bioreactor (MB-MBR) for developing biomass growth both on a fixed support and in suspension in a form of flocs, and on mobile supports, the bioreactor obtaining an effluent with a COD concentration of organic matter of less than 50 mg l−1 and a total nitrogen concentration of less than 15 mg l1; providing a biofiltration tank, separate from the first buffer tank of the bioreactor, that includes one or more biologically activated carbon (BAC) columns containing activated carbon; supplying the first buffer tank upstream of the bioreactor with raw wastewater containing micropollutants of pharmaceutical origin; pretreating the wastewater by passing the wastewater through a fine mesh sieve.
Abstract:
A heat exchanger includes: a first straight section; a second straight section; and a bent section or elbow linking the first straight section and the second straight section. Each straight section comprises a part of an internal cylindrical shell and of an external cylindrical shell, both cooperating to form an intershell space enclosing a bundle of parallel U-bent tubes having each a first and a second straight part respectively located in the first straight section and second straight section of the exchanger and a 180°-bent part located in the bent section or elbow of the exchanger, so that, in use, a first fluid to be heated and vaporized is flowing in the tubes. The external cylindrical shell is provided respectively at one end with an inlet and at another end with an outlet for a second fluid which is a hot thermal fluid.