摘要:
A process for producing styrene by dehydrogenation of ethylbenzene comprising feeding steam and ethylbenzene to three or more dehydrogenation reactors connected in series, an intermediate heater for heating the reaction mixture through heat exchange with steam being provided between each of said dehydrogenation reactors, said steam being first used as a medium to heat the respective intermediate heaters, and then mixed with ethylbenzene supplied as the feed to the first of said series of reactors, wherein 3 to 10 mols of steam are mixed with one mol of ethylbenzene and the temperature and pressure at the inlet of the final dehydrogenation reactor are 600.degree.-680.degree. C. and 0.4-0.8 Kg/cm.sup.2 (abs.), respectively, is disclosed.
摘要翻译:一种通过乙苯脱氢生产苯乙烯的方法,包括将蒸汽和乙苯输送到串联连接的三个或更多个脱氢反应器,通过在每个所述脱氢反应器之间提供与蒸汽热交换来加热反应混合物的中间加热器,所述蒸汽是第一 用作加热各个中间体加热器的介质,然后与作为进料供应的乙苯混合到所述一系列反应器中的第一个反应器中,其中将3至10摩尔蒸汽与1摩尔乙苯混合,并将温度和压力 最终脱氢反应器的入口分别为600℃-680℃和0.4-0.8kg / cm 2(绝对)。
摘要:
Liquid to be injected from an injection nozzle is supplied through a liquid supply channel toward the injection nozzle. Negative pressure for sucking the liquid injected from the injection nozzle through a suction port is produced by a suction unit and guided through a suction channel toward the suction port. A bypass channel which bypasses the liquid supply channel on the upstream side with respect to the injection nozzle and connects with the suction channel is provided. The bypass channel is opened and closed by an opening and closing unit. According to this structure, flow of unnecessary liquid from the injection nozzle can be reduced by opening the opening and closing unit while injection of liquid is stopping.
摘要:
According to an embodiment, a transmission apparatus is installed in a locomotive having ID information. A first connecting direction and a second connecting direction opposite the first connecting direction are defined for the locomotive. The transmission apparatus includes a transmission unit and a connection state determination unit. The transmission unit transmits the ID information received from other locomotive from one of the first connecting direction and the second connecting direction to other one of the first connecting direction and the second connecting direction. The connection state determination unit determines a connection state between the other locomotive and the locomotive in which the transmission apparatus is installed, based on the received ID information.
摘要:
Provided is an Sb—Te base alloy sinter sputtering target having Sb and Te as its primary component and comprising a structure in which Sb—Te base alloy particles are surrounded by fine carbon or boron particles; wherein, if the mean diameter of the Sb—Te base alloy particles is X and the particle size of carbon or boron is Y, Y/X is within the range of 1/10 to 1/10000. The present invention seeks to improve the Sb—Te base alloy sputtering target structure, inhibit the generation of cracks in the sintered target, and prevent the generation of arcing during the sputtering process.
摘要:
A power supply control method of performing a feedback control of an output voltage based on a deviation signal for a standard voltage value serving as a target value for the output voltage and a digital signal generated by analog/digital (A/D) conversion of the output voltage, the method includes selecting a range of the reference voltage for the A/D conversion based on the digital signal in a power supply startup period, and selecting a range of the reference voltage for the A/D conversion based on the deviation signal or a signal corresponding to the deviation signal in a steady state period.
摘要:
A control device includes a first terminal receiving a monitored output voltage and a second terminal transmitting a pulse width modulation (PWM) signal. A converting unit generates an A/D conversion synchronous signal, and an A/D converter samples the monitored output voltage in accordance with the A/D conversion synchronous signal. A pulse oscillator controls a position of a first edge on the PWM signal in accordance with the A/D conversion synchronous signal, and controls a position of a second edge based on the monitored voltage.
摘要:
A power supply controller includes an analog to digital (A/D) converter that performs analog-digital conversion of an output voltage and outputs a digital signal, a deviation signal generator unit that generates a deviation signal from the digital signal and a standard voltage value serving as an output voltage target value, and a power controller unit that controls the output voltage based on the deviation signal. The power supply controller includes a conversion range setting unit that sets a range of the reference voltage into the A/D converter based on a first signal as the digital signal in a power supply startup period, and sets the reference voltage range into the A/D converter based on a second signal as the deviation signal or as a signal corresponding to the deviation signal in a steady state period.
摘要:
Control accuracy with regard to variation of output voltage is improved. A direct current converter unit (20) that steps up or steps down an input voltage (Vin) to be outputted, and a control unit (10) that controls output voltage (Vout) of the direct current converter unit (20) by a pulse width modulation signal (Sw) are provided; the direct current converter unit (20) is provided with a voltage detection circuit (24) that monitors the output voltage (Vout); the control unit (10) is provided with an A/D converter (13) that samples a monitored voltage value (Vd) of the voltage detection circuit (24); and a pulse oscillator (14) that controls the position of one edge by an A/D conversion synchronous signal (Ss) indicating the start of sampling by the A/D converter (13), and generates the pulse width modulation signal (Sw), which controls the position of the other edge based on the monitored voltage value (Vd).
摘要:
A gas jet cooling apparatus for a continuous annealing furnace apparatus includes a plurality of tubular pressure headers extending in a width direction of a steel strip and having a length that is larger than a width of the steel strip, wherein the pressure headers are arranged to face each of front and back surfaces of the steel strip along a longitudinal direction of the steel strip at a pitch L; and a plurality of nozzles protruding from the pressure headers, wherein the nozzles are arranged along the width direction of the steel strip at a pitch W and arranged along the longitudinal direction of the steel strip in a staggered manner.
摘要:
To solve problematic trade-off between a bandwidth and a in-band deviation in an optical signal receiving circuit of a gigabit order that is required to have a wide dynamic range, the optical signal receiving circuit has a current-voltage conversion circuit that receives as an input a current signal outputted from a photoelectric conversion circuit for receiving and converting an optical signal into a current signal and converts it into a voltage signal, and realizes the wide dynamic range by providing the current-voltage conversion circuit with an AGC function and a phase compensation function by MOS transistors and a capacitance. Further, by providing the current-voltage conversion circuit with a second phase compensation function by a MOS transistor and a capacitance, it is made possible for the optical signal receiving circuit to reduce the in-band deviation at the time of minimum gain while securing the bandwidth at the time of maximum gain.