Mitsui Engineering and Shipbuilding Company Limited

Shigeru Nagamori

Toru Iwasaki

Takashi Arai

Kiyoshi Horiguchi

Yoshinao Hirano

Tetsuro Murayama

Yuichi Katoh

Masahiro Takahashi

Toshio Yamaki

Akira Tokinosu

Katsumi Sato

Katsuhide Murata

Junji Shirai

Kenichi Nagata

Hidenori Moriya

Katsumi Satoh

Takashi Yano

Nobutaka Oya

Yuuichi Katoh

Katsumo Sato

Kazuhito Horikiri

A gas hydrate production apparatus capable of reacting a raw gas with a raw water to thereby form a slurry gas hydrate and capable of removing water from the slurry gas hydrate by means of a gravitational dewatering unit. The gravitational dewatering unit is one including a cylindrical first tower body; a cylindrical dewatering part disposed on top of the first tower body; a water receiving part disposed outside the dewatering part; and a cylindrical second tower body disposed on top of the dewatering part, wherein the cross-sectional area of the second tower body is continuously or intermittently increased upward from the bottom.

Gas hydrate production apparatus

The invention provides a gas hydrate production apparatus which can eliminate the need for an agitator in a generator, and at the same time, can make constant the percentage of gas hydration of the product. A shell-and-tube-type generatoris provided downstream of an ejector-type mixerthat stirs and mixes a raw-material gas g and a raw-material water w. In addition, partition wallstoeach causing a gas hydrate slurry to turn around are provided in each of end platesandplaced respectively in the front and rear ends of the generator. Moreover, a dehydratorincluding a cone-shaped filteris provided downstream of the generator, and a drainage pipeis provided to the dehydrator. Further, a flow regulating valveis provided to the drainage pipe

A gas hydrate production apparatus capable of reacting a raw gas with a raw water to thereby form a slurry gas hydrate and capable of removing water from the slurry gas hydrate by means of a gravitational dewatering unit. This gravitational dewatering unit is one including a cylindrical first tower body; a cylindrical dewatering part disposed on top of the first tower body; a water receiving part disposed outside the dewatering part; and a cylindrical second tower body disposed on top of the dewatering part, wherein the cross-sectional area of the second tower body is continuously or intermittently increased upward from the bottom.

Gas hydrate production apparatus and dewatering unit

A process for producing gas hydrate pellets includes generating a gas hydrate by reacting raw gas and raw water under predetermined temperature and pressure conditions, and then shaping the gas hydrate into pellets by means of a pelletizer. Newly-formed gas hydrate or still-moist gas hydrate that has been partially dehydrated is shaped into pellets by means of a pelletizer, the shaping being conducted under conditions of the gas hydrate formation temperature and formation pressure. Subsequently, the shaped pellets are cooled to a sub-zero temperature by means of a refrigerating machine.

Process for producing gas hydrate pellet

In one method, a base for supporting a cured object is brought into close contact with or close to an aperture of a container so as to remove the bubbles therebetween. When one layer is formed, parts of the layer may be successively formed, wherein the base is moved back and forth to separate each part. Also, the aperture or container with the aperture may be inclined relative to the base to separate the layer from the aperture.

Optical molding method

An optical molding method includes the step of radiating a light flux onto a photocurable fluid substance while moving the light flux in such a manner as to draw a section of a target object so as to cure the irradiated portion. A plurality of light fluxes having different diameters is used in such a manner that only a light flux having a large diameter, or both a light flux having a large diameter and a light flux having a small diameter are used for a section having a thickness larger than the diameter of the light flux having a large diameter, while only a light flux having a small diameter is used for a section having a thickness smaller than the diameter of the light flux having a large diameter.

An optical molding apparatus is used for an optical molding method including the steps of radiating light onto a photocurable resin so as to cure the irradiated portion and laminating the cured objects. The apparatus comprises: a container provided with an aperture on a bottom surface or a side surface thereof; a base which is movably away from a surface of the aperture; a light radiation apparatus for radiating light into the container through the aperture; and a cured object holding plate which is freely mounted and dismounted from above the base. A movable base device for the optical molding apparatus comprises the base and an elevator erected on a peripheral edge of the container so as to lift and lower the base. The base is provided with a frame, one end thereof constituting a slide portion vertically moved along the elevator, a model holding plate removably mounted on the frame, frame supporting members with the base end sides thereof rotatably supported by the slide portion. The frame supporting members assume both a supporting state for supporting the frame when they are connected to the frame and an evacuated state when the connection is released and the free end sides are rotated upward.

Optical molding apparatus and movable base device therefor

A method for de-ashing crushed coal and transporting it in the form of pellets, said method comprising the following steps:

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Ichihara, Japan

Shigeru Nagamori