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Metal Working

Abyssal-casting-apparatus-for-liquefied-carbonated-gas

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Abyssal casting apparatus for liquefied carbonated gas

Details

Inventors: Ozaki, Masahiko; Sonoda, Keisuke; Kikuchi, Hiroshi; Tsukamoto, Osamu; Komatsu, Masao; Asai, Koetsu;
Assignee: Mitsubishi Jukogyo Kabushiki Kaisha (Tokyo, JP)
Primary Examiner: Capossela; Ronald C.
Assistant Examiner:
Attorney, Agent or Firm: Wenderoth, Lind & Ponack

A liquefied carbonated gas abyssal casting apparatus prevents freezing at an outlet of a casting tube and flotation of cast carbonated gas. The liquefied carbonated gas is fed from a reservoir to a single casting tube and discharged to the abyss through an inner tube of a double casting tube from a lower end of the single casting tube. A heat medium fluid is recirculated between the inner tube and an outer tube of the double casting tube. The liquefied carbonated gas which flows through the inner tube is heated to an abyssal temperature of from -1.degree. to 5.degree. C.

DETAILED DESCRIPTION An object of the present invention is to provide a carbonated gas abyssal casting apparatus for casting carbonated gas into the abyss through a casting tube extending into the abyss for preventing freezing at an outlet of a casting tube and floating of the cast carbonated gas.
In order to attain the above-noted object according to the present invention, there is provided an abyssal casting apparatus for casting liquefied carbonated gas into an abyss through a casting tube extending from a liquefied carbonated gas reservoir on a base on the sea and reaching the abyss.
The apparatus comprises a liquefied carbonated gas casting tube whose upper end portion is mounted on said base on the sea and whose lower end portion is opened at a casting position in the abyss, and has a length of at least 3,000 m.
A direct heating portion that is directly heated by the sea water therearound heats the liquefied carbonated gas along a length of at least 100 m of the casting tube from the sea level.
A forcible heating device heated by a heat medium fluid fed by a pump is provided to at least one of casting tube portions upstream and downstream of the direct heating portion to thereby heat the liquefied carbonated gas within the casting tube.
It is known that in general, the temperature of the sea water is high close to surface layer thereof, and is stable at several .
degree.
C.
at a level lower than a certain depth of water.
This depth of water is referred to as a temperature boundary layer.
The temperature boundary layer generally varies in the range of 100 to 500 m depending upon the sea region or the season.
In the apparatus according to the present invention, a direct heating portion for heating the liquefied carbonated gas with the sea water around the casting tube is formed in the casting tube portion having a length of at least 100 m from the sea level above the temperature boundary layer.
The forcible heating device is provided so that the heat medium fluid is fed by a pump to the casting tube portion on at least one of the upstream side and the downstream side of the direct heating portion to heat the liquefied carbonated gas within the casting tube

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