JP5528921B2 - Gas hydrate adhesion water separator - Google Patents

Description

  For example, the present invention provides a gas hydrate slurry from a gas hydrate slurry by a pellet forming apparatus installed in a natural gas hydrate production plant that produces natural gas hydrate existing under the seabed in a state suitable for transportation and storage. The present invention relates to an attached water separation apparatus for gas hydrate that removes water adhering to the surface of a gas hydrate pellet when the gas hydrate pellet is formed.

  Natural gas hydrate (NGH), the main component of which is methane, exists under the seabed at a depth of 500 m or less in frozen land zones such as Siberia, Canada, and Alaska and in the continental area. This NGH is a water-like solid substance or clathrate hydrate that is composed of gas molecules such as methane and water molecules and is stable under low temperature and high pressure, and as clean energy that emits less carbon dioxide and air pollutants. It is attracting attention.

  Natural gas, after being liquefied, is stored and used as energy, but its production and storage are performed at an extremely low temperature of -162 ° C. On the other hand, natural gas hydrate has the advantage that it exhibits stable properties without being decomposed at −20 ° C. and can be handled as a solid. Because of these characteristics, it is possible to effectively use gas resources in undeveloped small and medium gas fields for reasons such as profitability existing all over the world, or short distance from small gas fields, small-scale transportation. In such a case, a natural gas hydrate system (NGH system) is expected in which natural gas is hydrated for transportation, storage, and regasification.

  In the NGH system, NGH suitable for transportation and storage is generated at NGH shipping bases such as small and medium gas fields, and transported to the desired NGH receiving base by transport ships and vehicles, etc., and the transported NGH is stored at the NGH receiving base. If necessary, it will be used as an energy source by the NGH gasifier. FIG. 5 is a schematic block diagram illustrating an example of the configuration of a gas hydrate generation plant used in the NGH shipping base. The mined raw material gas G is sufficiently mixed with water W in the generator 1 which is a high-pressure reaction vessel, and is hydrated to produce a low concentration gas hydrate (GH) slurry. The produced GH slurry is supplied to the dehydrator 3 by the supply pump 2 to produce a dehydrated high-concentration GH slurry. At this time, the dehydrator 3 is supplied to the lowermost part of the dehydrator 3. When the supplied GH slurry ascends the dehydrator 3, the GH slurry is dehydrated by a draining part (a part for separating hydrate particles and water by micropores, slits, etc.) provided in the middle of the dehydrator 3. It is taken out from the upper end part. The extracted gas hydrate is extracted as powdered GH powder. This GH powder is supplied to the pellet molding machine 4 and granulated to form GH pellets of an appropriate size for transportation and storage. Next, after being cooled by the cooler 5 to a temperature at which it does not decompose even under normal pressure, it is supplied to the decompression device 6. That is, from the generator 1 to the cooler 5, processing is performed under normal temperature and high pressure, and the cooler 5 and the depressurization device 6 are processed to a temperature that does not decompose even under normal pressure. Thereafter, the formed GH pellets are fed to a storage tank and stored.

  However, in the conventional process, each apparatus of the dehydrator 3 and the pellet former 4 is required, and the gas hydrate production plant may be enlarged and the production process may be complicated.

  By the way, the applicant of the present application has proposed a manufacturing method and manufacturing apparatus for gas hydrate pellets that can manufacture pellets excellent in storability at low cost (see Patent Document 1). This method for producing gas hydrate pellets comprises dehydrating gas hydrate by compression molding means under its production conditions, and forming gas hydrate raw material gas and water between the gas hydrate particles into gas hydrate. , Which is molded into pellets. Further, as the compression molding means, a briquetting roll having a plurality of pellet molding dies on the outer peripheral surface and comprising a pair of rolls rotating in directions opposite to each other.

  In the apparatus for producing gas hydrate pellets described in Patent Document 1, since dehydration and pellet molding are performed by compression molding means, there is no need to separately provide a dehydrator and a pellet molding machine. This is advantageous for downsizing the rate generation plant. However, when a briquetting roll is used as the compression molding means, it is preferable that the gas hydrate supplied to the compression molding means is relatively sufficiently dehydrated. If the dehydration is insufficient, the separated water is transported to the cooling process together with the pellets, which may hinder the pellet depressurization process and storage. For this reason, it is preferable to dehydrate the gas hydrate supplied to the briquetting roll type pellet molding machine in advance, and therefore it may be necessary to provide a dehydrator in some cases. Patent Document 1 discloses a reciprocating pellet manufacturing apparatus. With this reciprocating type, compression and dehydration can be performed efficiently, but the apparatus described in the same document results in so-called batch processing, which impairs continuous operation of the gas hydrate production plant. At the same time, there is a risk of increasing the production volume in the plant.

  On the other hand, the applicant of the present application has proposed a gas hydrate pellet molding apparatus in which the dehydrator and the pellet molding machine can be performed by a single apparatus and the continuous processing of the gas hydrate production plant is not impaired. (See Patent Document 2).

  The gas hydrate pellet forming apparatus disclosed in Patent Document 2 is communicated with a compression chamber filled with gas hydrate slurry generated by the generator and compressed, and compressed in the compression chamber. A cooling chamber that receives and cools the gas hydrate pellets, a supply path that communicates with the cooling chamber and communicates with a depressurization step that depressurizes the cooled gas hydrate pellets, and a squeezing means provided in the squeezing chamber; A valve means for opening and closing between the compression chamber and the cooling chamber; and a pellet holding means having a holding chamber for moving between the cooling chamber and the supply path and receiving gas hydrate pellets. After squeezing the gas hydrate with the squeezing means, the valve means is opened, and the squeezing operation of the squeezing means is continued to supply gas hydrate pellets to the cooling chamber. Gas hydrate pellets are sequentially fed from the cooling chamber to the holding chamber of the pellet holding means, and the gas hydrate pellets are supplied to the supply path in a state where the cooling chamber is shut off by the moving operation of the pellet holding means. It is a thing.

JP2007-270029A Japanese Patent Application No. 2009-087565

  As described above, when the gas hydrate slurry is squeezed to remove moisture, for example, the water is squeezed up to 90% by weight. Moisture remains in the hydrate pellets, and part of the hydrate pellets exists as adhering water adhering to the surface of the gas hydrate pellets. Further, when forming into gas hydrate pellets, water splashes and the like are generated. On the other hand, in order to maintain the gas hydrate pellets in a stable state under normal pressure, the adhering water and the scattered water are frozen because it is cooled to about −20 ° C. There is a possibility that the gas hydrate pellets on which the ice has been formed are adhered to each other and a lump of pellets is formed inside the cooling device. In addition, the formed pellet lump grows in the cooling device to become a larger lump, which may block the cooling device. Furthermore, it accumulates on the heat transfer surface of the cooling device, lowering the heat transfer efficiency, and there is a possibility that the gas hydrate cannot be sufficiently cooled.

  In view of this, an object of the present invention is to provide a gas hydrate adhering water separation device that reliably separates adhering water, splash water, and the like accompanying the formed gas hydrate pellets.

  As a technical means for achieving the above object, the gas hydrate adhered water separation device according to the present invention supplies a raw material gas and water to a generator and reacts them under high pressure to produce a gas hydrate slurry. Then, after removing moisture from the gas hydrate slurry, in a gas hydrate production plant in which pellets of a desired size are formed and cooled, and then depressurized to normal pressure, the gas hydrate slurry is filled with the gas hydrate slurry. A squeezing device that squeezes the hydrate slurry to form gas hydrate pellets, and a gas hydrate pellet formed by the squeezing device in communication with the squeezing device, wherein the density is lower than water. , Maintain the liquefied state under pressure for the production of gas hydrate slurry, stabilize the state of gas hydrate pellets A sealing chamber filled with a sealing liquid containing a liquid that does not freeze in a temperature environment and a gas hydrate pellet that settles in the sealing chamber is received in the sealing liquid chamber and transferred to the next process. It is characterized by comprising a pellet transfer device and a water separation plate below the pellet transfer device for receiving the gas hydrate that has settled in the sealed liquid chamber and allowing the water descending the sealed liquid chamber to pass through.

  Of the water used when generating the gas hydrate slurry in the generator, unreacted water that has not reacted with the raw material gas is squeezed out by the squeezing device to increase the concentration of the gas hydrate. Moreover, it compresses by being pressurized and a gas hydrate pellet is formed. The formed gas hydrate pellets are supplied to the sealing chamber. Since the sealing liquid is filled with a sealing liquid having a density lower than that of water, it adheres to the surface of the gas hydrate pellets and the gas hydrate pellets or is scattered when supplied to the sealing liquid chamber. Water will settle in the sealing liquid. Water forms a small-diameter sphere in the liquid due to surface tension. When these gas hydrate pellets and water settle and reach the pellet transfer device, the gas hydrate pellets are captured by the pellet transfer device and transferred to the next step. Further, the settled water passes through the water separation plate and reaches the bottom of the sealed chamber under the water separation plate. In this state, water is separated from the liquid filled in the sealed chamber due to the density and stays in the lower portion of the sealed chamber. Therefore, the staying water can be discharged from the lower part of the sealed liquid chamber. The discharged water can be recovered and returned to the production process for reaction with the source gas.

  Further, the gas hydrate adhered water separation device according to the invention of claim 2 is provided with a discharge means at the pellet outlet of the pressing device, and when supplying the gas hydrate pellets from the pressing device to the sealed liquid chamber, The gas hydrate pellet is cut at the front end by the discharging means and supplied to the sealed liquid chamber.

  Since the gas hydrate pellets are formed by being compressed, if they are continuously fed from the squeezing device to the sealed liquid chamber, gas hydrate pellets that are too large for the sealed chamber may be fed. is there. For this reason, it is made to cut | disconnect by the said discharge | emission means, when discharging from a pressing apparatus so that it may become a thing of a suitable magnitude | size for sedimentation in a sealing liquid chamber.

  As the discharging means, for example, a scraping plate that can slide along the outlet surface of the pellet outlet of the pressing device is provided, and the tip of the gas hydrate pellet that protrudes from the pellet outlet to the sealing chamber side by sliding of the scraping plate The part is cut to a size suitable for processing in the sealed chamber.

  In the gas hydrate adhering water separation device according to the third aspect of the present invention, the liquid filled in the sealing chamber is liquid propane or liquid hexane.

  The production of gas hydrate pellets is performed under normal temperature under a high pressure of 5.4 MPa, for example. Therefore, the sealing liquid to which the generated gas hydrate pellets are supplied needs to maintain a liquid state under high pressure. Further, the gas hydrate pellets are cooled to a temperature at which they do not decompose even under normal pressure. That is, from the sealed liquid chamber, it is transferred by the pellet transfer device to the cooling process of the next process. In the cooling step, the gas hydrate pellets are cooled to about −20 ° C., but the sealing liquid is also transferred to the cooling step together with the gas hydrate. For this reason, the sealing liquid needs not to be frozen even in an atmosphere of −20 ° C. Furthermore, a liquid having a density lower than that of water is used so that the water can settle in the sealing liquid. As the liquid satisfying these conditions, liquid propane or liquid hexane is used.

  According to a fourth aspect of the present invention, there is provided a gas hydrate adhering water separation apparatus, wherein a raw material gas and water are supplied to a generator and reacted under high pressure to generate a gas hydrate slurry, and from the gas hydrate slurry In a gas hydrate production plant in which moisture is removed, formed into pellets of a desired size, cooled, and then depressurized to normal pressure, an outer cylinder and an inner cylinder are provided, and the inner cylinder is formed by a perforated plate. A gas hydrate slurry that is a liquid having a density lower than that of water and communicating with the inside of the inner cylinder at the pellet outlet at the front end of the pressing apparatus, and having a pressing plunger that slides in the inner cylinder A sealed chamber filled with a sealing solution of a liquid that does not freeze in a temperature environment that maintains a liquefied state under the pressure for generation of the gas and stabilizes the state of the gas hydrate pellets, and the compression An open / close plunger that opens and closes the pellet outlet, and a pellet transfer device that is provided in a lower portion of the sealing liquid chamber and transfers gas hydrate pellets from the sealing liquid chamber to the next process. , Provided below the pellet transfer device, partitioning the bottom of the sealed liquid chamber and storing the water storage part together with the water separating plate for passing water settling in the sealed liquid and introducing it into the water storage part, and staying in the water storage part A gas hydrate slurry supplied to the inner cylinder by advancing the squeezing plunger toward the pellet outlet in a state where the pellet outlet is closed by the opening and closing plunger. To form gas hydrate pellets, the opening and closing plunger is retracted from the pellet outlet to open the pellet outlet, and the pressing plunger is further advanced. The gas hydrate pellets are extruded and supplied to the sealed liquid chamber, and the pellet transfer device that receives the gas hydrate pellets settling in the sealed liquid chamber transfers the gas hydrate pellets to the next step. It is said.

  The gas hydrate pellets supplied to the sealing liquid chamber settle in the sealing liquid. Further, water entrained in the gas hydrate pellets also settles in the sealing liquid, and further forms a spherical shape due to surface tension because it is larger than the density of the sealing liquid. When the gas hydrate pellets reach the pellet transfer device, the pellets are received by the pellet transfer device, and the gas hydrate pellets are transferred to the next step. The water further settles, passes through the water separation plate, flows into the storage section, stays in the storage section, is discharged by the discharge pump, and is collected for generation of gas hydrate as necessary.

  Moreover, the adhering water separation device for gas hydrate according to the invention of claim 5 is provided with a scraper slidable along the outlet surface of the pellet outlet at the pellet outlet of the pressing device, and the pellet of the pressing device. The gas hydrate pellet protruding from the outlet to the sealed liquid chamber is cut by sliding the scraper.

  When supplying gas hydrate pellets formed by being squeezed by the squeezing device to the sealed liquid chamber, a gas hydrate having a size suitable for being settled in the sealed liquid and transferred by the pellet transfer device. The pellet is cut by sliding the scraper so as to form a pellet.

  According to the gas hydrate adhering water separation apparatus according to the present invention, the formed gas hydrate pellets remove adhering water as much as possible and are transferred to the next process, so that the amount of water accompanying the next process is reduced. be able to. For this reason, it can prevent as much as possible that water freezes in a cooling process, and gas hydrate pellets will adhere.

  In addition, the gas hydrate pellets are supplied into the sealing liquid having a density lower than that of water. However, since the temperature of the sealing liquid is easy to adjust, the water from the gas hydrate pellets can be adjusted by appropriately adjusting the temperature. Can be efficiently performed, and the temperature can be easily adjusted in the cooling step, and the operating efficiency of the gas hydrate production plant can be improved.

It is a figure which shows typically the adhesion water separation apparatus of the gas hydrate which concerns on this invention. It is a figure explaining shaping | molding of the gas hydrate pellet supplied to the adhesion water separation apparatus which concerns on this invention, and has shown the state by which gas hydrate slurry is supplied to a pressing apparatus. The state which squeezes water from a gas hydrate slurry with the said pressing device is shown. The state which supplies the gas hydrate pellet formed with the said pressing apparatus to a sealing liquid chamber is shown. It is a schematic block diagram explaining an example of the structure of the conventional gas hydrate production | generation plant utilized for the shipping base of a natural gas hydrate.

  Hereinafter, based on a preferred embodiment shown in the drawings, a gas hydrate adhered water separation device according to the present invention will be described in detail.

  FIG. 1 is a diagram for explaining a gas hydrate adhering water separation apparatus according to the present invention. As in the case of the gas hydrate production plant shown in FIG. 5, the gas hydrate is fed to the generator 1 with a raw material gas G and water. W is supplied from the source gas supply pipe 11 and the reaction water supply pipe 12, respectively. In the generator 1, the raw material gas G and water W react to generate a gas hydrate slurry, which is fed to the pressing device 21 of the pellet forming device 20 through the slurry supply pipe 13. Further, unreacted water is recovered from the return pipe 1b from the generator 1 via the unreacted water recirculation pump 1a. The discharge side of the unreacted water recirculation pump 1a is connected to the reaction water supply pipe 12. The reaction water supply pipe 12 is provided with a regulating valve 12a, and the opening degree of the regulating valve 12a is adjusted based on the measured value of the pressure gauge 11c that measures the internal pressure of the generator 1.

  The squeezing device 21 includes a cylindrical inner cylinder 21a and an outer cylinder 21b that accommodates the inner cylinder 21a. The inner cylinder 21a can be moved forward and backward by sliding in the direction of the axis O of the inner cylinder 21a. An appropriate squeezing plunger 21e is accommodated. The squeezing plunger 21e is advanced and retracted by actuation of a hydraulic cylinder 21f as a drive source. A part of the inner cylinder 21a is provided with a screen portion 21c having a through hole of an appropriate size.

  A slurry recovery pipe 21d connected to the suction side of the slurry circulation pump 11a is connected to the lower part of the squeezing device 21, and the raw material gas supply pipe 11 is connected to the discharge side of the slurry circulation pump 11a. . The discharge side of the source gas supply pump 11b is connected to the suction side of the slurry circulation pump 11a. That is, as will be described later, the squeezed water generated when the gas hydrate slurry is generated by the squeezing device 21 merges with the raw material supplied from the raw material gas supply pump 11b and is supplied to the generator 1 by the slurry circulation pump 11a. It has been returned. In addition, the middle of the slurry supply pipe 13 and the slurry recovery pipe 21d are connected by a return pipe 13a, and a return valve 13b is provided in the middle of the return pipe 13a. A gas / water buffer 21h is connected to a back pressure chamber 21g on the rear side of the compression plunger 21e via a back pressure pipe 21i. The gas / water buffer 21h is connected to the slurry recovery pipe 21d via a regulating valve 21j.

  The front end of the squeezing chamber 22 that is the front side of the squeezing plunger 21e of the squeezing device 21 is a pellet outlet 22a, and the pellet outlet 22a has an upper portion of a cylindrical sealed chamber 30 whose longitudinal direction is the longitudinal direction. Are connected, and the compression chamber 22 and the sealed liquid chamber 30 are communicated with each other. The sealed liquid chamber 30 is filled with a sealed liquid L which is a liquid having a density lower than that of water. The gas hydrate is generated at room temperature under a high pressure of about 5.4 MPa, the outer cylinder 21b of the pressing device 21 is formed of a so-called high pressure vessel, and the sealed chamber 30 is also formed of a high pressure vessel. Has been. For this reason, the sealing liquid L is assumed to maintain a liquid state under a high pressure of about 5.4 MPa. For example, liquid propane or liquid hexane is used. A cushion tank 31 is provided in the sealing liquid chamber 30, and the sealing liquid L is always filled with the sealing liquid L by supplying the sealing liquid L to the sealing liquid chamber 30. A portion of the sealing chamber 30 facing the pellet outlet 22a of the compression chamber 22 is provided with a scraper 32 as discharge means that can slide along the outlet surface of the pellet outlet 22a by the operation of the drive cylinder 32a. It has been.

  In addition, an open / close plunger 33 that can be moved back and forth with respect to the pellet outlet 22a of the compression chamber 22 is disposed. When the opening / closing plunger 33 is advanced and pressed against the pellet outlet 22a, the pellet outlet 22a is closed, the pressing chamber 22 and the sealing liquid chamber 30 are blocked, and the pellet outlet 22a is opened by moving backward. It is made to do. The opening / closing plunger 33 is advanced and retracted by, for example, the operation of the closing cylinder 33a.

  A neck portion 30a having a reduced diameter is formed at an intermediate portion of the sealing chamber 30, and a gas hydrate pellet P that settles in the sealing chamber 30 is sealed under the neck portion 30a as will be described later. A pellet transfer device 34 for transferring to the next process while being discharged to the outside of the chamber 30 is provided. A water separation plate 35 is provided below the pellet transfer device 34 and inside the sealed liquid chamber 30. The water separation plate 35 allows water to pass therethrough and prevents gas hydrate pellets P from passing through. For example, the water separation plate 35 is formed with a through hole that allows water to pass therethrough. ing. The bottom of the sealed chamber 30 below the water separation plate 35 is a water storage section 36.

  The water storage part 36 is connected to the suction side of a water recovery pump 37, and the water recovery pump 37 is operated to discharge water remaining in the water storage part 36. It is preferable that the discharged water is returned to the generator 1 and used as water W for reacting the raw material gas G. Further, a water level detector 37a for detecting the water level staying in the storage part 36 is provided, and the water recovery pump 37 is driven based on an output signal of the water level detector 37a.

  The operation of the adhering water separation apparatus for gas hydrate according to the present invention constructed as described above will be described below.

  FIG. 2 shows the pressing device 21 in a state in which the gas hydrate slurry generated by the generator 1 is supplied. At this time, as shown in FIG. 2, the compression plunger 21e is in a position where the inner cylinder 21a is retracted to the rear. The opening / closing plunger 33 is in a position where the pellet outlet 22a of the pressing device 21 is closed by moving forward. In this state, gas hydrate slurry is supplied from the slurry supply pipe 13 to the pressing chamber 22. Unreacted water entrained in the supplied gas hydrate is filtered by the screen portion 21c of the inner cylinder 21a and flows into the outer cylinder 21b, and is generated through the slurry recovery pipe 21d by the slurry circulation pump 11a. Collected in vessel 1. When the gas hydrate slurry is filled into the inner cylinder 21a, the squeezing plunger 21e moves forward to squeeze the gas hydrate slurry and squeeze water from the gas hydrate slurry as shown in FIG. Thereby, it becomes a lump of powdery gas hydrate and a gas hydrate pellet is formed. As shown in FIG. 3, the pressing plunger 21e advances to the front part of the inner cylinder 21a. At this time, for example, when about 10% by weight of gas hydrate slurry is filled, the operation of the squeezing means is adjusted so that the water is squeezed to about 90% by weight and gas hydrate pellets are generated.

  Next, as shown in FIG. 4, the opening / closing plunger 33 moves backward to open the pellet outlet 22 a of the pressing device 21. When the squeezing plunger 21e further advances in this state, the formed gas hydrate pellet P is pushed out from the pellet outlet 22a to the sealed liquid chamber 30. At this time, when the gas hydrate pellets P continuously extruded are too large for the treatment in the sealed liquid chamber 30, the scraper plate 32 is driven by the drive cylinder 32a and slides along the exit surface. The gas hydrate pellet P is cut. When the gas hydrate pellets P are extruded into the sealing liquid chamber 30, they are immersed in the sealing liquid L filled in the sealing liquid chamber 30. Since the density of the sealing liquid L is smaller than that of water, the gas hydrate pellet P settles the sealing liquid L. Moreover, the water adhering to the surface at the time of formation of the gas hydrate pellet P will also settle similarly. The adhering water receives a surface tension due to a density difference from the sealing liquid L and is separated from the surface of the gas hydrate pellet P and becomes spherical.

  When the gas hydrate pellets P settle and reach the pellet transfer device 34, they are received by the pellet transfer device 34 and discharged from the sealed liquid chamber 30 to the outside. Since the pellet transfer device 34 is also filled with the sealing liquid L, the sealing liquid L is also discharged together with the gas hydrate pellets P. Further, when the gas hydrate pellets P reach the water separation plate 35 provided below the pellet transfer device 34 in the sealed liquid chamber 30, the water separation plate 35 stops the sedimentation. On the other hand, the water separated from the gas hydrate pellets P passes through the water separation plate 35 and stays in the water storage section 36 below the water separation plate 35. The accumulated water is returned to the generator 1 by the water recovery pump 37.

  The gas hydrate pellets P transferred by the pellet transfer device 34 are cooled in the next step. At this time, since the sealing liquid L is also transferred to the cooling step along with the gas hydrate P, the sealing liquid P is also cooled. In the cooling step, the gas hydrate pellets P are cooled at −40 ° C. in order to maintain a stable state even under normal pressure. For this reason, the sealing liquid L is also exposed to an atmosphere of −40 ° C., and it is preferable to use a liquid that does not freeze in this atmosphere. As described above, liquid propane, liquid hexane, or the like is used. Is suitable.

  The cooled gas hydrate pellets P are depressurized to normal pressure and are in a state suitable for storage, and are fed to the storage tank.

  According to the gas hydrate adhering water separator according to the present invention, water adhering to the surface of the formed gas hydrate pellets can be reliably separated from the gas hydrate pellets. In this case, water that is frozen can be reduced as much as possible, which contributes to improved handling of gas hydrate pellets.

G Raw material gas W Water L Sealing liquid 1 Generator
21 Squeezer
21a Inner cylinder
21b outer cylinder
21e compression plunger
30 Sealing chamber
32 scraper (discharge means)
33 Opening / closing plunger
34 Pellet transfer device
35 Water separator
36 Water reservoir
37 Water recovery pump

Claims (5)

After supplying raw material gas and water to a generator and reacting under high pressure to produce a gas hydrate slurry, after removing moisture from the gas hydrate slurry, after forming into pellets of a desired size and cooling In a gas hydrate production plant that reduces pressure to normal pressure,
A pressing device for filling the gas hydrate slurry and pressing the gas hydrate slurry to form gas hydrate pellets;
The gas hydrate pellets formed by the squeezing device in communication with the squeezing device are supplied, the density is lower than that of water, and the state is liquefied under the pressure for generating the gas hydrate slurry. And a sealing chamber filled with a sealing solution with a liquid that does not freeze in a temperature environment that stabilizes the state of the gas hydrate pellets,
A pellet transfer device arranged at the lower part of the sealed liquid chamber, receiving a gas hydrate pellet settling in the sealed liquid chamber and transferring it to the next process;
Water adhering to the gas hydrate, comprising a water separation plate that is below the pellet transfer device and receives a gas hydrate that has settled in the sealed liquid chamber and allows water that descends through the sealed liquid chamber to pass therethrough. Separation device.   A discharge means is provided at the outlet of the squeezing device, and when the gas hydrate pellets are supplied from the squeezing device to the sealing liquid chamber, the tip of the gas hydrate pellets is cut by the discharging means to the sealing liquid chamber. The apparatus for separating attached water of gas hydrate according to claim 1, wherein the apparatus is supplied.   The gas hydrate adhering water separation device according to claim 1 or 2, wherein the liquid filled in the sealed liquid chamber is liquid propane or liquid hexane. After supplying raw material gas and water to a generator and reacting under high pressure to produce a gas hydrate slurry, after removing moisture from the gas hydrate slurry, after forming into pellets of a desired size and cooling In a gas hydrate production plant that reduces pressure to normal pressure,
An outer cylinder and an inner cylinder, the inner cylinder is formed of a perforated plate, and a pressing device having a pressing plunger that slides in the inner cylinder,
It communicates with the inside of the inner cylinder at the pellet outlet at the front end portion of the pressing device, and maintains a liquefied state under a pressure for generating a gas hydrate slurry that is a liquid having a density lower than that of water, A sealed chamber filled with a sealed solution of a liquid that does not freeze in a temperature environment that stabilizes the state of the gas hydrate pellets;
An open / close plunger that opens and closes the pellet outlet by moving forward and backward with respect to the front end of the pressing device;
A pellet transfer device that is provided at a lower portion of the sealing liquid chamber and transfers gas hydrate pellets from the sealing liquid chamber to the next process;
A water separation plate that is provided below the pellet transfer device, divides the bottom of the sealing liquid chamber and stores the water stored in the sealing liquid together with the water storage section, and introduces the water into the water storage section.
A discharge pump for discharging water accumulated in the water storage part from the storage part,
The gas hydrate slurry supplied to the inner cylinder is squeezed to form gas hydrate pellets by advancing the compression plunger toward the pellet outlet while the pellet outlet is closed with the opening and closing plunger, and the opening and closing Retract the plunger from the pellet outlet to open the pellet outlet, further advance the squeezing plunger to push out the gas hydrate pellets and supply them to the sealed liquid chamber. The adhering water separation apparatus for gas hydrate, wherein the received pellet transfer apparatus transfers the gas hydrate pellets to the next step.   A scraper slidable along the outlet surface of the pellet outlet is provided at the pellet outlet of the pressing device, and the gas hydrate pellet protruding from the pellet outlet of the pressing device into the sealed liquid chamber is slid on the scraping plate. The apparatus for separating adhering water of gas hydrate according to claim 4, wherein the apparatus is cut by movement.

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