Dewatering device and method for gas hydrate slurrys

• US 20040020123A1
• Filed: 05/06/2003
• Published: 02/05/2004
• Est. Priority Date: 08/31/2001
• Status: Abandoned Application

• Current Assignee: Mitsubishi Heavy Industries, Ltd.
• Original Assignee: Mitsubishi Heavy Industries, Ltd.
• Inventors: Kondo, Yuichi, Nagayasu, Hiromitsu, Kimura, Takahiro, Iwasaki, Shojiro, Itoh, Katsuo, Ema, Haruhiko, Yoshikawa, Kozo
• Application Number:
  US10/416,004
• Publication Number:
  US 20040020123A1
• Time in Patent Office: Days
• US Class Current: 48/127.3
• CPC Class Codes: F17C 11/007 for hydrocarbon gases, such as methane or natural gas, propane, butane or mixtures thereof [LPG]

Abstract

It is required to provide a gas hydrate dewatering device which performs dewatering and produces a gas hydrate with a low proportion of included water continuously at high efficiency, under conditions in which the gas hydrate is not decomposed and the water is not frozen into ice. This is achieved by providing a dewatering device (12) for gas hydrate slurry which eliminates the water from a slurry in which gas hydrate is dispersed in water, including a dewatering mechanism of a screw press type within an environment which is maintained at temperature and pressure conditions at which the gas hydrate does not decompose and the water does not freeze.

Claims

1. A dewatering device (12) for a gas hydrate slurry which eliminates water from a slurry in which a gas hydrate is dispersed in water, in which a dewatering part is provided in an environment which is maintained at temperature and pressure conditions at which the gas hydrate does not decompose and the water does not freeze.

6. A dewatering device (12) for gas hydrate slurry according to claim 1, wherein said gas hydrate is a natural gas hydrate.

2. A dewatering device (12) for a gas hydrate slurry which eliminates water from a slurry in which a gas hydrate is dispersed in water, in which a dewatering part is provided in a pressure vessel (42) which is maintained at a temperature and a pressure at which the gas hydrate does not decompose and the water does not freeze.

3. A dewatering device (12) for a gas hydrate slurry according to claim 2, wherein said dewatering part is a screw press type.

4. A dewatering device (12) for a gas hydrate slurry according to claim 2, wherein a drive section (42) of said dewatering part is provided in said pressure vessel (40).

5. A dewatering device (12) for a gas hydrate slurry according to claim 2, wherein said dewatering part is driven by a canned motor (42).

7. A dewatering device (12) for gas hydrate slurry according to claim 2, wherein said gas hydrate is a natural gas hydrate.

8. A dewatering method for gas hydrate slurry which eliminates water from a slurry in which a gas hydrate is dispersed in water, in which said slurry in which a gas hydrate is dispersed in water is supplied to a dewatering part which is provided in an environment which is maintained at temperature and pressure conditions at which the gas hydrate does not decompose and the water does not freeze, and is dewatered thereby.

13. A dewatering method for gas hydrate slurry according to claim 8, wherein said gas hydrate is a natural gas hydrate.

9. A dewatering method for gas hydrate slurry which eliminates water from a slurry in which a gas hydrate is dispersed in water, in which a dewatering part is provided in a pressure vessel (40) which is maintained at a temperature and a pressure at which the gas hydrate does not decompose and the water does not freeze, and said slurry in which a gas hydrate is dispersed in water is supplied to said dewatering part and is dewatered thereby.

10. A dewatering method for gas hydrate slurry according to claim 9, wherein said dewatering part is a screw press type.

11. A dewatering method for gas hydrate slurry according to claim 9, wherein a drive section (42) of said dewatering part is provided in said pressure vessel (40).

12. A dewatering method for gas hydrate slurry according to claim 9, wherein said dewatering part is driven by a canned motor (42).

14. A dewatering method for gas hydrate slurry according to claim 9, wherein said gas hydrate is a natural gas hydrate.