摘要:
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.
摘要:
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.
摘要:
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.
摘要:
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.
摘要:
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.
摘要:
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.
摘要:
A station for localized surface treatment of an industrial workpiece to be treated includes: at least one treatment chamber having a cell or two half-cells, each cell or half-cell delimiting a tight space between walls of the cell or half-cell and a respective portion or face of the industrial workpiece, the cell or each half-cell having a wall having an opening for covering a corresponding portion or face of the industrial workpiece, the opening of the cell or half-cell being delimited by a continuous sealing gasket, the cell or each half-cell including positioning means, the at least one treatment chamber having a supply and emptying circuit; and a plurality of storage vats each containing a treatment fluid, the supply and emptying circuit connecting each storage vat to the at least one treatment chamber so as to supply the at least one treatment chamber with respective treatment fluids.
摘要:
A continuous annealing furnace for annealing steel strips has a reaction chamber wherein the steel strips are transported vertically, the reaction chamber having openings supplied with a reactant, also called reactant openings, located at the top or at the bottom of the reaction chamber, wherein the reaction chamber further has other openings supplied with an inert gas, also called inert gas openings, the inert gas openings being located on the lateral sides of the reaction chamber.
摘要:
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.
摘要:
A method for generating a steam cycle at a pressure around 200 bars and a temperature around 600° C., using an industrial steam generator with a solar receiver admitting an incident solar flux around 600 kW/m2, includes: generating a water-steam mixture in the evaporator by transferring heat from the incident solar flux onto the evaporator; separating the water-steam mixture into saturated water and saturated steam in the separator drum, the saturated steam having a pressure from 160 to 200 bars and a temperature from 347 to 366° C.; injecting the feed water into the mixing drum, where it is mixed with the saturated water from the separator drum, the mixed water next returning toward the evaporator via the return pipe provided with the circulation pump, such that the temperature of the mixed water entering the evaporator is below the saturated steam temperature, by a value from 5 to 15° C.