Shinko Pantec Co., Ltd.

Mitsubishi Corporation

Hiroko Kobayashi

Hiroyuki Harada

Kiyoshi Hirai

Shinichi Yasui

Takashi Sasaki

Mamoru Nagao

Akira Asari

Akiko Miyake

Teruyuki Morioka

A simply configured cooling mechanism for an apparatus for producing hydrogen and oxygen is disclosed. The configuration makes it possible to freely select the type of heat exchanger, without any restrictions, in order to improve cooling efficiency. In particular, a heat exchanger for cooling deionized water in a deionized water tank, which contains an electrolytic cell, is installed outside the tank. An inlet to the heat exchanger is connected to a deionized water flow outlet from the tank that is below the level of the deionized water the tank by a pipe, and an outlet from the heat exchanger to tank is connected to a deionized water flow inlet that is positioned in the tank below the deionized water flow outlet.

Apparatus for producing hydrogen and oxygen

A simple and efficient apparatus for producing hydrogen and oxygen is disclosed, wherein resistance to the flow of deionized water, oxygen gas, and hydrogen gas does not increase, and the amount of electric energy required for electrolysis can be reduced. A bipolar-type apparatus for producing hydrogen and oxygen, wherein a main water feeding path is formed in the approximate center of electrode plates in the axial direction, and an anode chamber and a cathode chamber are formed on opposing surfaces of the electrode plates to store porous conductors. A secondary water feeding path for the anode chamber directs water from the main water feeding path to the anode chamber. On the cathode side of the apparatus, a hydrogen gas collecting chamber is formed, a plurality of radial hydrogen gas paths are formed from the cathode chamber to the hydrogen gas collecting chamber, and a hydrogen gas discharging path are formed to axially hydrogen gas collecting chambers in each electrode plate. On the anode side of the apparatus, an oxygen gas path is formed from the anode chamber to the oxygen gas collecting chamber, and an oxygen gas discharging path is formed to axially connect to the oxygen gas collecting chambers in each electrode plate.

An apparatus for controlling dissolved oxygen concentration in primary and secondary cooling water in boiling water and pressurized water atomic reactors is disclosed. The apparatus contains an electrolytic cell having an anode chamber and a cathode chamber separated from one another by a diaphragm of a solid polymer electrolyte membrane. The diaphragm contains: (a) an ion exchange membrane and (b) a pair of multilayered electrodes chemically plated to both surfaces of the ion exchange membrane. The electrolytic cell is operatively connected to a circular route for cooling water in the reactor, and hydrogen gas generated through electrolysis of deionized water in the cathode side of the cell is introduced into the circular route for the cooling water to control the dissolved oxygen concentration of the cooling water.

Control apparatus for oxygen concentration of water in atomic reactor

An apparatus for producing hydrogen and oxygen having a pressure vessel surrounding a bipolar-type water electrolytic cell The electrolytic cell contains a plurality of joined solid electrolyte membrane units, and each solid electrolyte membrane unit contains a solid electrolyte membrane, porous conductors in contact with opposing surfaces of the solid electrolyte membrane, and bipolar-type electrode plates in contact with each porous conductor, wherein each electrode plate is capable of performing as an anode and a cathode. A gap is present between the interior of the pressure vessel and the exterior of the water electrolytic cell to form a water pressure regulating chamber, and water of a preselected pressure can be fed into the water pressure regulating chamber such that the pressure differential between the pressure inside the water electrolytic cell and the pressure inside the water pressure regulating chamber is maintained within the pressure differential tolerance range of the water electrolytic cell.

A hydrogen/oxygen gas generating system includes a deionized water container and a cell for water electrolysis having anode and cathode compartments, the cell being submerged in deionized water in the container. Oxygen gas generated in the anode compartment is channeled to an oxygen gas separating chamber defined in the container at its top whereas hydrogen gas generated in the cathode compartment is channeled to a gas/liquid separator. The pressures of these gases are detected, and in accordance with the detected gas pressures, a first gas piping line for delivering oxygen gas outward from the oxygen gas separating chamber and a second gas piping line for delivering hydrogen gas outward from the separator are controlled such that the differential pressure between the gases may fall in a limited range. Water level in the oxygen gas separating chamber and water level in the gas/liquid separator are detected, and the detected levels are utilized to control the pressures and the supply of deionized water into the container. The system can generate hydrogen and oxygen gases of high purity under high pressure in a safe manner without a need for gas compressors.

Growing community of inventors

Kobe, Japan

Hiroko Kobayashi