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    • 1. 发明专利
    • Liquid radioactive waste processing facilities
    • 液体放射性废物处理设备
    • JP2000075094A
    • 2000-03-14
    • JP24183598
    • 1998-08-27
    • Hitachi Eng Co LtdHitachi Ltd日立エンジニアリング株式会社株式会社日立製作所
    • NAGANO SHINICHIYUKITA ATSUSHIKOMATSU AKIHIROHIRAYAMA SATOSHI
    • G21F9/04G21F9/06
    • Y02E30/40
    • PROBLEM TO BE SOLVED: To miniaturize processing facilities by installing a high-electrical-conductance liquid waste condensation device steam condenser at a higher position than a low- electrical-conductance liquid waste collection tank, by transferring distilled water being distilled and treated by a high-electrical-conductance liquid waste condensation device to the low-electrical-conductance liquid waste collection tank by gravity flow, and by performing demineralizing treatment.
      SOLUTION: Equipment drain, floor drain, and chemical drain being generated in a power plant are received by an equipment drain sump tank 1, a floor drain sump tank 9, and a chemical drain sump tank 12. As the pretreatment of the chemical drain, collection from the chemical drain sump tank 12 to a high-electrical-conductance liquid waste(HCW) collection tank 14 is performed by a chemical drain sump pump 13, and distillation treatment is made by an HCW transfer pump 15 in HCW condensation means 16-20. Distilled water is transferred by gravity flow from the HCW condensation device steam condenser 20 to a low-electrical-conductance liquid waste(LCW) collection tank 3. The distilled water of the equipment drain, the floor drain, and the chemical drain is mixed in the tank 3, solid content is filtered and separated in the case of high electric conductance, and demineralizing treatment is made by an LCW demineralizing device 6.
      COPYRIGHT: (C)2000,JPO
    • 要解决的问题:通过将高电导液体废物冷凝装置的蒸汽冷凝器安装在比低电导液体废液收集罐更高的位置处,通过将经蒸馏和高处理的蒸馏水 - 电导液体废物冷凝装置通过重力流向低电导液体废液收集罐,并进行脱盐处理。 解决方案:发电厂产生的设备排水,排水和化学排放由设备排水池1,地下排水池9和化学品排放池12接收。作为化学排水的预处理, 从化学品排放池12到高电导液体废物(HCW)收集箱14的收集由化学品排泄池泵13进行,在HCW冷凝装置16中由HCW输送泵15进行蒸馏处理, 20。 蒸馏水通过重力流从HCW冷凝装置蒸汽冷凝器20输送到低电导液体废液(LCW)收集罐3.设备排出的蒸馏水,地漏和化学排放物混合在 在槽3中,在高电导的情况下,固体成分被过滤分离,通过LCW脱盐装置6进行脱盐处理。
    • 4. 发明专利
    • POWER CONTROLLER FOR FUEL CELL INVERTER
    • JPH06197543A
    • 1994-07-15
    • JP34386992
    • 1992-12-24
    • HITACHI LTDHITACHI ENG CO LTD
    • YAMADA KATSUKUNINAGANO SHINICHI
    • G05F1/67H01M8/04H02J3/38H02M7/48
    • PURPOSE:To prevent the abrupt change of the output power of an inverter at the switching time between output constant-voltage control and output constant-power control by providing a control means which controls the output fluctuation of the inverter at the switching time between the output constant-voltage control and output constant-power control. CONSTITUTION:When a linkage operation command is inputted to an inverter, an analog switch 19 is turned on and transformers 9 and 10 respectively detect the output voltage of an inverter and the voltage of a power system. Then a phase detector 11 detects the phase difference between both voltages and inputs the detected phase difference to a frequency adjuster 21. The output voltage of the inverter is controlled so that the phase of the output voltage can be synchronized to that of the voltage of the power system and, after a circuit breaker 8 is incorporated upon completing the synchronization, a rate-of-change limiter 14 inputs the output power of the inverter and a power deviation signal to a high-value selector 18 and, at the same time, an analog switch 17 is turned on so that the signal of an initial phase setter 16 can be inputted to the selector 18. Immediately after incorporating the breaker 8, a phase signal, the signal of the setter 16, and an output frequency command 20 are inputted to the adjuster 21 and phase control is performed. As a result, the output power of the inverter can be controlled without allowing the abrupt change of the output power.
    • 7. 发明专利
    • FUEL CELL POWER GENERATION FACILITY AND OPERATION THEREOF
    • JPH06338341A
    • 1994-12-06
    • JP12677193
    • 1993-05-28
    • HITACHI LTD
    • SATO TAKAONAGANO SHINICHIHORIUCHI SUSUMU
    • H01M8/04H01M8/24
    • PURPOSE:To enable power supply at high efficiency and high reliability without forcing heavy operational condition to a formation apparatus even for a load in which dc and ac roads co-exist by output-controlling a cell itself in a controllable range even when the capacities of the dc, ac loads are changed regardless of the condition of the cell side. CONSTITUTION:The output current value of each fuel cell is detected by current detectors AD1-ADn, and an output voltage value is detected by a detector VD, while calculation is carried out in a controller CTL. A power inverter 1 is used to output power according to the expression: (the output power of the power inverter) = (output voltage set value) - (d.c. load power), within an upper limit value of the total output power of the cell that can be generated at the time. The total power that can be generated can exceed the d.c. load capacity, and the increase/decrease in the d.c. road is corrected by a.c. load, with the cell output unchanged. The output of the device 1 is controlled based on the expression even when the a.c. load is increased or decreased. When, on contrary, the power is to be generated from the cell side, the openings of valves V11-Vn2 are controlled and the power generated is determined as a set value.