Mitsui Engineering and Shipbuilding Company Limited

Toshio Yamaki

Kenji Ogawa

Toru Iwasaki

Masahiro Takahashi

Takashi Arai

Shigeru Nagamori

Kiyoshi Horiguchi

Tetsuro Murayama

Akira Tokinosu

Yuichi Katoh

Kazuo Abe

Kazuyoshi Matsuo

Hitoshi Koyama

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

Unburned carbon is efficiently separated according to the properties of fly ash. An apparatus is provided which comprises: a slurry preparation tank () in which water (c) is added to fly ash (a) to produce a slurry (d); a scavenger addition device () for adding a scavenger (e) to the slurry (d); a vertical surface-modification device () in which the slurry after addition of the scavenger is stirred at a high speed to impart shear force thereto and thereby cause the scavenger (e) to adhere to the surface of unburned carbon (b) contained in the slurry; a regulating tank () in which a blowing agent (f) is added to the slurry (d') which has undergone surface modification with the surface modification device; and a flotation machine () with which the unburned carbon (b) is floated together with bubbles (n) and separated from the slurry containing the blowing agent.

Apparatus for removing unburned carbon in fly ash

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

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Ichihara, Japan

Toshio Yamaki