Gas hydrate production device and gas hydrate dehydrating device

• US 20050107648A1
• Filed: 03/28/2002
• Published: 05/19/2005
• Est. Priority Date: 03/29/2001
• Status: Abandoned Application

• Current Assignee: Mitsubishi Heavy Industries, Ltd.
• Original Assignee: Mitsubishi Heavy Industries, Ltd.
• Inventors: Kondo, Yuichi, Nagayasu, Hiromitsu, Kimura, Takahiro, Endo, Hitoshi, Watabe, Masaharu, Kita, Yoshihiro, Iwasaki, Shojiro, Itoh, Katsuo, Ema, Haruhiko, Yoshikawa, Kozo, Fujita, Hisayoshi, Uehara, Satoru
• Application Number:
  US10/275,283
• Publication Number:
  US 20050107648A1
• Time in Patent Office: Days
• US Class Current: 585/15
• CPC Class Codes: B01J 19/10 employing sonic or ultrasonic vibrations
• CPC Class Codes: B01J 19/20 in the form of helices, e.g. screw reactors
• CPC Class Codes: B01J 19/26 Nozzle-type reactors, i.e. the distribution of the initial reactants within the reactor is effected by their introduction or injection through nozzles
• CPC Class Codes: B01J 2219/00006 Large-scale industrial plants
• CPC Class Codes: B01J 2219/0004 Processes in series
• CPC Class Codes: B01J 2219/00094 Jackets
• CPC Class Codes: B01J 2219/00135 Electric resistance heaters
• CPC Class Codes: C10L 3/00 Gaseous fuels; Natural gas; Synthetic natural gas obtained by processes not covered by subclass C10G, C10K; Liquefied petroleum gas
• CPC Class Codes: C10L 3/06 Natural gas; Synthetic natural gas obtained by processes not covered by C10G, C10K3/02 or C10K3/04 liquefying by pressure and cold treatment F25J
• CPC Class Codes: C10L 3/108 Production of gas hydrates
• CPC Class Codes: F26B 2200/18 Sludges, e.g. sewage, waste, industrial processes, cooling towers
• CPC Class Codes: F26B 5/14 by applying pressure, e.g. wringing; by brushing; by wiping

Abstract

The invention relates to a gas hydrate dewatering cooling and outputting apparatus which dewaters and solidifies gas hydrate slurry and takes out the solidified gas hydrate under ambient pressure. The apparatus comprises an output apparatus body 31 having a supply port 32 for the gas hydrate slurry on an upper part of a pressure vessel, a screw extruder 33 provided at a lower part inside the output apparatus body 31 and having a drain 37 and an outlet sealing device, and a cooling device 41 which cools the vicinity of the outlet 39 of the screw extruder 33. According to such a construction, slurry gas hydrate can be efficiently and continuously dewatered, cooled and solidified, and gas hydrate powder can be consolidated into blocks and taken out to the atmosphere.

Claims

1. A gas hydrate production apparatus comprising:

a gas hydrate generating reactor which generates gas hydrate slurry from a raw material gas; and

a gas hydrate dewatering apparatus which dewaters the generated gas hydrate slurry,

wherein said gas hydrate dewatering apparatus comprises;

a physical dewatering device which physically dewaters the generated gas hydrate slurry; and

a hydration dewatering device which reacts water contained in the gas hydrate with the raw material gas to form hydrate, during a dewatering process by the physical dewatering device or after the dewatering.

2. A gas hydrate dewatering apparatus which dewaters and solidifies gas hydrate slurry supplied from a gas hydrate generating reactor and takes out the solidified gas hydrate under ambient pressure, comprising:

an output apparatus body having a supply port for the gas hydrate slurry on an upper part of a pressure vessel,

a screw dewatering, compacting and molding device provided below said output apparatus body and having a drain and an outlet sealing device, and

a cooling device which cools the vicinity of the outlet of said screw dewatering, compacting and molding device.

3. A gas hydrate dewatering apparatus according to claim 2, wherein a pressurized gas introducing pipe is connected to said output apparatus body above said screw dewatering, compacting and molding device, whereby gas hydrate forming substance can be supplied to said output apparatus body.

4. A gas hydrate dewatering apparatus according to claim 2, wherein a cutting device which cuts gas hydrate briquettes into predetermined lengths is further provided at an outlet of said screw dewatering, compacting and molding device.

5. A gas hydrate dewatering apparatus according to claim 2, wherein an outlet of said screw dewatering, compacting and molding device is formed in a rectangular shape in cross-section.

6. A gas hydrate dewatering apparatus according to claim 2, wherein the dewatering device which dewaters excess water from the introduced gas hydrate slurry is provided below said supply port.

7. A gas hydrate dewatering apparatus according to claim 6, wherein said dewatering device comprises either one or both of a dewatering screen and a mechanical dewatering apparatus which mechanically dewaters.

8. A gas hydrate dewatering apparatus according to claim 7, wherein said mechanical dewatering apparatus is a press dewaterer.

9. A gas hydrate dewatering apparatus according to claim 8, wherein a plurality of said press dewaterers are arranged vertically in a plurality of stages.

10. A gas hydrate dewatering apparatus according to claim 8, wherein facing sluice plates are provided on opposite sides of said press dewaterer, and overflow channels with approximate centers of upper edges of said sluice plates located above the face of rollers cut out to drain dewatered excess water to the side are formed.

11. A gas hydrate dewatering apparatus which dewaters gas hydrate slurry, comprising:

a container having an internal space for accommodating said gas hydrate,

a gas supply device which supplies raw material gas before being hydrated, to said internal space,

a cooling device which cools gas hydrate accommodated in said internal space, and

a stirring device which stirs and brings the raw material gas into contact with gas hydrate in said internal space.

12. A gas hydrate dewatering apparatus according to claim 11, wherein there is provided a pressurized dewatering device which pressurizes and dewaters the gas hydrate slurry before being accommodated in said container.

13. A gas hydrate dewatering apparatus according to claim 11, wherein said stirring device comprises a plurality of shafts having spiral protrusions on side faces thereof, arranged in said internal space, and which are rotated individually to convey the gas hydrate.

14. A gas hydrate dewatering apparatus according to claim 13, wherein said stirring device has two shafts, and both shafts are arranged parallel with each other, with the respective protrusions overlapping when viewed from the axial direction.

15. A gas hydrate dewatering apparatus according to claim 11, further comprising a detection device which detects a reaction condition of the gas hydrate accommodated in said internal space with gas, and an adjustment device which adjusts a gas supply amount according to said reaction condition.

16. A gas hydrate dewatering apparatus according to claim 15, wherein said detection device is provided on said container arranged in close proximity to an intake of the gas hydrate.

17. A gas hydrate dewatering apparatus according to claim 11, wherein the output port of the gas hydrate provided in said container is arranged at a lower position than the intake of the gas hydrate provided in the same container.