WO2012132980A1 - ガスハイドレートペレットの成形方法 - Google Patents
ガスハイドレートペレットの成形方法 Download PDFInfo
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- WO2012132980A1 WO2012132980A1 PCT/JP2012/056957 JP2012056957W WO2012132980A1 WO 2012132980 A1 WO2012132980 A1 WO 2012132980A1 JP 2012056957 W JP2012056957 W JP 2012056957W WO 2012132980 A1 WO2012132980 A1 WO 2012132980A1
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- gas hydrate
- pellet
- compression
- plunger
- pellets
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L3/00—Gaseous fuels; Natural gas; Synthetic natural gas obtained by processes not covered by subclass C10G, C10K; Liquefied petroleum gas
- C10L3/06—Natural gas; Synthetic natural gas obtained by processes not covered by C10G, C10K3/02 or C10K3/04
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2/00—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic
- B01J2/22—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic by pressing in moulds or between rollers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B9/00—Presses specially adapted for particular purposes
- B30B9/02—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material
- B30B9/04—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material using press rams
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B9/00—Presses specially adapted for particular purposes
- B30B9/02—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material
- B30B9/04—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material using press rams
- B30B9/06—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material using press rams co-operating with permeable casings or strainers
- B30B9/067—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material using press rams co-operating with permeable casings or strainers with a retractable abutment member closing one end of the press chamber
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L3/00—Gaseous fuels; Natural gas; Synthetic natural gas obtained by processes not covered by subclass C10G, C10K; Liquefied petroleum gas
- C10L3/06—Natural gas; Synthetic natural gas obtained by processes not covered by C10G, C10K3/02 or C10K3/04
- C10L3/10—Working-up natural gas or synthetic natural gas
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L3/00—Gaseous fuels; Natural gas; Synthetic natural gas obtained by processes not covered by subclass C10G, C10K; Liquefied petroleum gas
- C10L3/06—Natural gas; Synthetic natural gas obtained by processes not covered by C10G, C10K3/02 or C10K3/04
- C10L3/10—Working-up natural gas or synthetic natural gas
- C10L3/108—Production of gas hydrates
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L5/00—Solid fuels
- C10L5/02—Solid fuels such as briquettes consisting mainly of carbonaceous materials of mineral or non-mineral origin
- C10L5/06—Methods of shaping, e.g. pelletizing or briquetting
- C10L5/08—Methods of shaping, e.g. pelletizing or briquetting without the aid of extraneous binders
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L5/00—Solid fuels
- C10L5/02—Solid fuels such as briquettes consisting mainly of carbonaceous materials of mineral or non-mineral origin
- C10L5/34—Other details of the shaped fuels, e.g. briquettes
- C10L5/36—Shape
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L5/00—Solid fuels
- C10L5/02—Solid fuels such as briquettes consisting mainly of carbonaceous materials of mineral or non-mineral origin
- C10L5/34—Other details of the shaped fuels, e.g. briquettes
- C10L5/36—Shape
- C10L5/363—Pellets or granulates
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L2290/00—Fuel preparation or upgrading, processes or apparatus therefore, comprising specific process steps or apparatus units
- C10L2290/32—Molding or moulds
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L2290/00—Fuel preparation or upgrading, processes or apparatus therefore, comprising specific process steps or apparatus units
- C10L2290/46—Compressors or pumps
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L2290/00—Fuel preparation or upgrading, processes or apparatus therefore, comprising specific process steps or apparatus units
- C10L2290/58—Control or regulation of the fuel preparation of upgrading process
Definitions
- the gas hydrate of high strength is used.
- the present invention relates to a method for forming rate pellets.
- Natural gas hydrate (NGH), the main component of which is methane, exists under the seabed at a depth of 500 m or less in the frozen land belts of Siberia, Canada, Alaska, and the continental area.
- NGH Natural gas hydrate
- 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 is liquefied and then stored and used as energy, but its production and storage are performed at an extremely low temperature of -162 ° C.
- 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.
- NGW system natural gas hydrate system
- 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 source gas G is sufficiently mixed with water W in the generator 1 which is a high-pressure reaction vessel to be hydrated, and a low concentration gas hydrate (GH) slurry is generated.
- the produced GH slurry is supplied to the dehydrator 3 by the supply pump 2 and dehydrated to produce a high concentration GH slurry.
- the dehydrator 3 is supplied to the lowermost part of the dehydrator 3.
- the 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.
- the cooler 5 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.
- processing is performed under normal temperature and high pressure, which is a gas hydrate generation condition, and the cooler 5 and the depressurization device 6 process to a temperature that does not decompose even under normal pressure. Is done. Thereafter, the formed GH pellets are fed to a storage tank and stored.
- 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.
- the compression molding means uses a briquetting roll having a plurality of pellet molding dies on the outer peripheral surface and comprising a pair of rolls rotating in opposite directions.
- the applicant of the present application has proposed a gas hydrate pellet molding apparatus that improves the efficiency of GH pellet formation by performing a dehydration process and a GH pellet molding process in a gas hydrate production plant with a single device.
- a compression plunger is arranged in the inner cylinder of the compression chamber, and water is squeezed from the GH slurry supplied to the inner cylinder by the advancement of the compression plunger. This is done from a screen provided in part.
- the gate valve is opened, the squeezing plunger is further advanced, and the GH pellet P is pushed out and moved to the cooling chamber through the gate valve.
- the gate valve is closed to cool the cooling chamber, and the squeezing plunger is retracted to supply the next GH slurry.
- JP 2007-270029 A JP 2010-235868
- the inventor of the present invention repeatedly performed destructive tests on GH pellets molded from the generated GH in order to obtain data for contributing to the planning and design of the molding machine for the GH pellets. At this time, considering the efficiency of the operation of the GH production plant, the processing speed can be increased by increasing the operating speed of the compression plunger and increasing the molding speed of the GH pellet. The specimen was also molded by increasing the operating speed of the pressing plunger.
- the specimen of the GH pellet obtained by the molding method described above was subjected to a triaxial compression tester for a destructive test, and for the destructive test, it was destroyed only by applying a slight axial stress. It was in a state where accurate measurement could not be performed. For this reason, after various studies and molding with trial and error, it was possible to mold GH pellets with high strength and obtain almost accurate fracture stress. This also increases the strength of the GH pellets produced and molded at the GH production plant.
- An object of the present invention is to provide a method for forming gas hydrate pellets that can increase the fracture strength and can be more easily handled during transportation and storage of GH pellets.
- a method for testing the breaking strength of a gas hydrate pellet according to the present invention is characterized in that a gas hydrate slurry is prepared by supplying a raw material gas and water to a generator and reacting them under high pressure.
- Squeezing speed of the squeezing plunger is minimized.
- squeezing of an expression plunger may be large.
- the molding method of the gas hydrate pellet which concerns on invention of Claim 2 WHEREIN:
- the advance speed of the said squeezing plunger is as follows. Length of pellets before pressing ⁇ 10 -2 [m / min] It is characterized by being less than.
- the movement distance of the compression plunger during compression is to form GH pellets from the GH slurry supplied to the compression chamber, and the dimensions of the molded GH pellets are in accordance with the specifications of the compression chamber, It is desirable that the concentration of GH pellets be high regardless of the size of the compression chamber. Moreover, since the density
- GH pellets having high breaking strength can be formed by firmly bonding the GH particles. For this reason, it is possible to supply GH that is highly convenient for handling during transportation and storage.
- FIG. 4 shows a GH pellet molding apparatus equipped with a compression chamber and a compression plunger suitable for carrying out the present invention.
- a raw material gas G and water W are supplied to the generator 1 in the GH production plant from a raw material supply pipe 11 and a refrigerant supply pipe 12, respectively.
- the GH slurry generated by the reaction between the raw material gas G and the water W in the generator 1 is fed to the pressing chamber 21 of the pellet forming apparatus 20 through the slurry supply pipe 13. Further, unreacted refrigerant is recovered from the return pipe 1b from the generator 1 via the refrigerant recirculation pump 1a.
- the discharge side of the refrigerant recirculation pump 1a is connected to the refrigerant supply pipe 12.
- the refrigerant supply pipe 12 is provided with an adjustment valve 12a, and the opening degree of the adjustment valve 12a is adjusted based on the measured value of the pressure gauge 11c that measures the internal pressure of the generator 1.
- the compression chamber 21 is composed of a cylindrical inner cylinder 21a and an outer cylinder 21b that accommodates the inner cylinder 21a.
- the inner cylinder 21a can slide forward and backward in the direction of the axis O of the inner cylinder 21a.
- An appropriate squeezing plunger 21e is accommodated.
- the compression plunger 21e is configured to move forward and backward by the operation of a drive source (not shown).
- the drive source is hydraulic, or the output of the motor is converted into a linear motion by a rack and pinion mechanism. Can be used.
- a part of the inner cylinder 21a is provided with a screen portion 21c having a through hole of an appropriate size.
- the cooling chamber 23 communicates with the forward end side of the compression plunger 21e of the compression chamber 21 via a gate valve 22. By opening the gate valve 22, the compression chamber 21 and the cooling chamber 23 are in communication with each other.
- the cooling chamber 23 is formed in a cylindrical shape having an inner diameter larger than the inner diameter of the inner cylinder 21 a of the compression chamber 21.
- a pellet transfer valve 24 is disposed on the opposite side of the cooling chamber 23 from the compression chamber 21.
- the pellet transfer valve 24 is configured by a valve box 24b in which a spherical valve body 24a is housed, like a so-called ball valve, and a holding chamber 24c is formed in the valve body 24a.
- the holding chamber 24c has an inner diameter that is larger than the inner diameter of the cooling chamber 23, and has a dimension sufficient to accommodate the GH pellet.
- a part of the holding chamber 24c is opened. Thus, an opening 24d is formed. Then, by rotating the valve body 24a with respect to the valve box 24b, the opening 24d is positioned at the receiving position facing the cooling chamber 23 and the discharge position facing the supply path 25 for supplying GH pellets to the dehydration process.
- the cooling chamber 23 and the supply path 25 are Is not communicating.
- the valve body 24a is rotated clockwise from the receiving position shown in FIG. 4 to be positioned at the discharging position, and is rotated counterclockwise from the discharging position to be positioned at the receiving position. .
- a slurry recovery pipe 21d connected to the suction side of the slurry circulation pump 11a is connected to the lower part of the compression chamber 21, and the raw material supply pipe 11 is connected to the discharge side of the slurry circulation pump 11a.
- the discharge side of the raw material supply pump 11b is connected to the suction side of the slurry circulation pump 11a. That is, the squeezed water generated when the GH slurry is generated in the compression chamber 21 merges with the raw material supplied from the raw material supply pump 11b, and is returned to the generator 1 by the slurry circulation pump 11a.
- 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 opposite to the compression chamber 21 via the back pressure pipe 21i with the compression plunger 21e interposed therebetween.
- the gas / water buffer 21h is connected to the slurry recovery pipe 21d via a regulating valve 21j.
- the cooling chamber 23 is supplied with a high-pressure cooling medium via a refrigerant supply pipe 23a, and the supplied cooling medium is recovered by the recovery pump 23b via the refrigerant recovery pipe 23c.
- the refrigerant recovery pipe 23b is provided with a refrigerant buffer 23d, and the recovered refrigerant is temporarily retained to stabilize the operation of the recovery pump 23c.
- a discharge pipe 23e connected to the discharge side of the recovery pump 23c is connected to a refrigerant source such as a cooler (not shown) to which the refrigerant supply pipe 23a is connected, and temporarily supplied from the refrigerant source to the cooling chamber 23.
- the cooling medium is recovered.
- the compression plunger 21e When forming GH pellets, the compression plunger 21e is in a position retracted to the end, that is, in a position farthest from the cooling chamber 23, the gate valve 22 is closed, and the pellet transfer valve 24 is provided with a valve body 24a. In the receiving position. At this time, the inner cylinder 21a of the compression chamber 21 is supplied with GH slurry and filled with a predetermined amount.
- the plunger 21e moves forward, the GH slurry in the compression chamber 21 is crushed and squeezed, and the GH slurry is squeezed to 90% by weight. And GH pellets P are formed. Further, the squeezed water at this time passes through the screen portion 21c and flows out to the outer cylinder 21b, is recovered from the slurry recovery pipe 21d by the slurry circulation pump 11a, and is returned to the generator 1.
- FIG. 1 (a) shows a state in which the squeezing plunger 21e is at the rear while the GH slurry is supplied.
- the squeezing plunger 21e is advanced from this state, and water is squeezed from the GH slurry supplied into the squeezing chamber 21.
- the forward speed of the pressing plunger 21e that is, the pressing speed is made as small as possible.
- the length of the compression chamber 21 is D [m] as shown in FIG. Vp ⁇ D ⁇ 10 ⁇ 2 [m / min] (Formula 1) It is preferable that
- the gate valve 22 When the GH pellet is formed, the gate valve 22 is opened, and the compression chamber 21 and the cooling chamber 23 are in communication with each other. Since the pellet transfer valve 24 is in the receiving position in the supply path 25, the compression chamber 21, the cooling chamber 23, and the holding chamber 24c have the same internal pressure.
- the squeezing plunger 21e continues to advance to the position of the gate valve 22, so that GH pellets that have been squeezed to 90% by weight are pushed out from the squeezing chamber 21 to the cooling chamber 23 and fed. Become.
- the cooling chamber 23 is filled with the previously formed GH pellets, an amount equal to the GH pellet P fed to the cooling chamber 23 until the pressing plunger 21e reaches the forward end.
- the GH pellet P is pushed out from the cooling chamber 23 to the holding chamber 24c.
- the gate valve 22 When the pressing plunger 21e moves forward and the GH pellet in the pressing chamber 21 is pushed out, the gate valve 22 is closed.
- the gate valve 22 When the gate valve 22 is closed, the squeezing plunger 21e starts retreating, and GH slurry is supplied to the inner cylinder 21a.
- the cooling chamber 23 When the gate valve 22 is closed, the cooling chamber 23 is in an airtight state. Therefore, the refrigerant is supplied from the refrigerant supply pipe 23a, and the GH pellet in the cooling chamber 23 is kept in a stable state even under normal pressure. Cool to temperature to maintain.
- the valve body 24a is rotated from the receiving position to the discharging position. At this time, the end of the cooling chamber 23 is kept closed by the valve body 24a by rotating the valve body 24a in the clockwise direction. With the valve body 24a positioned at the discharge position, the GH pellet P is depressurized, and the GH pellet P received in the holding chamber 24c falls into the supply path 25. Next, the valve body 24a is rotated counterclockwise in FIG. 4 from the discharging position to be positioned at the receiving position. In this state, the state shown in FIG. 4 is obtained, and one step by the pellet forming apparatus 20 is completed.
- continuous GH pellets can be formed, and high-strength GH pellets are formed.
- FIG. 2 and FIG. 3 show the results of tests conducted by a triaxial compression tester on the strength of GH pellets when the forming method according to the present invention is carried out, and show axial stress sv ′ [MPa] and axial strain Epa [%]. ] Is shown.
- This test was conducted by using the GH pellet obtained by the GH pellet molding apparatus shown in FIG. 4 in a triaxial compression tester. When the GH pellet was used in the triaxial compression tester, it was in a solid state. This is because it can only be provided. In addition, it is equivalent to what continues pressing in the pressing chamber 21 shown in FIG.
- the triaxial compression tester performs a destructive test while applying an axial stress (vertical stress) to a constant lateral stress (horizontal stress) sh '.
- the lateral stress sh ′ is 1.0, 2.0, 3.0 [MPa]
- the speed of the compression plunger is the initial length L 0 ⁇ 10 ⁇ 3 [m / min] of the GH pellet.
- the axial stress sv ′ increases, and it can be determined that the strength is increased by squeezing under any condition. That is, it can be determined that the strength of the GH pellet formed by squeezing the GH by moving the squeezing plunger at a low speed increases.
- GH pellets that can be used in a triaxial compression tester were molded and used as a specimen for the strength test. However, in the GH production plant, the GH slurry was compressed. Thus, when the GH pellet is formed, the speed of the pressing plunger is made as small as possible.
- GH pellets having high strength can be formed, so that the handling of GH pellets during transport and storage is improved, and the utility value of GH as energy. It contributes to the improvement.
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Abstract
Description
圧搾前のペレットの長さ×10-2[m/min]
未満とすることを特徴としている。
圧搾前のペレットの長さ×10-2[m/min]
未満としたものである。
Vp < D×10-2 [m/min] (式1)
となるようにすることが好ましい。
軸歪Epa[%] = ((L0-L)/L0)×100 (式2)
なお、Lは当該時におけるペレット長である。
また、図3に示す結果は、側方向応力sh'を1.0、2.0、3.0[MPa]とし、前記圧搾プランジャの速度をGHペレットの初期長さL0×10-3[m/min]とした。
図2と図3に示されるように、軸歪Epaが大きくなるにつれ、軸方向応力sv'が大きくなっており、いずれの条件でも圧搾することにより強度が増加していると判断できる。すなわち、圧搾プランジャを低速で移動させてGHの圧搾を行って成形されたGHペレットの強度は大きくなると判断できる。なお、強度試験を行うためには三軸圧縮試験機に供することができる状態のGHペレットを成形し、それを供試体として強度試験に供したが、GH生成プラントにおいては、GHスラリーを圧搾してGHペレットを成形する際に圧搾プランジャの速度を極力小さくするものである。
20 ペレット成形装置
21 圧搾室
21a 内筒
21b 外筒
21e 圧搾プランジャ
22 ゲート弁
23 冷却室
25 供給路
Claims (2)
- 原料ガスと水とを生成器に供給して高圧下で反応させてガスハイドレートスラリーを生成し、ガスハイドレートスラリーから水分を除去した後、所望の大きさのペレットに成形するガスハイドレート生成プラントにおけるガスハイドレートペレットの成形方法において、
ガスハイドレートスラリーを供給した筒状の圧搾室の軸方向に進退可能な圧搾プランジャを設け、
前記圧搾プランジャの前進時に圧搾動作を行わせて、ガスハイドレートスラリー中から搾水してガスハイドレートペレットを成形するに際して、
前記圧搾プランジャの前進速度を極力小さくしたことを特徴とするガスハイドレートペレットの成形方法。 - 前記圧搾プランジャの前進速度は、
圧搾前のペレットの長さ×10-2[m/min]
未満とすることを特徴とする請求項1に記載のガスハイドレートペレットの成形方法。
Priority Applications (8)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2013507395A JPWO2012132980A1 (ja) | 2011-03-30 | 2012-03-19 | ガスハイドレートペレットの成形方法 |
AU2012234629A AU2012234629B2 (en) | 2011-03-30 | 2012-03-19 | Method of molding gas hydrate pellet |
ES12765558T ES2716011T3 (es) | 2011-03-30 | 2012-03-19 | Método de moldeo de pella de hidrato de gas |
US14/114,728 US9039949B2 (en) | 2011-03-30 | 2012-03-19 | Method of molding gas hydrate pellet |
EP12765558.7A EP2692837B1 (en) | 2011-03-30 | 2012-03-19 | Method of molding gas hydrate pellet |
BR112013034023A BR112013034023A2 (pt) | 2011-03-30 | 2012-03-19 | método de moldagem de um pélete de hidrato de gás |
CA2834763A CA2834763C (en) | 2011-03-30 | 2012-03-19 | Method of molding gas hydrate pellet |
RU2013148118/04A RU2584685C2 (ru) | 2011-03-30 | 2012-03-19 | Способ формования гранулы газового гидрата |
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JP (1) | JPWO2012132980A1 (ja) |
AU (1) | AU2012234629B2 (ja) |
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CA (1) | CA2834763C (ja) |
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US9744508B2 (en) * | 2013-06-27 | 2017-08-29 | Dongshin Hydraulics Co., Ltd. | Apparatus for revaporizing gas hydrate pellets |
JP6867951B2 (ja) | 2014-12-28 | 2021-05-12 | フィッシュラー,エホシュア | ガスハイドレート輸送および貯蔵のシステムおよび方法 |
RU2643370C1 (ru) * | 2017-06-16 | 2018-02-01 | Федеральное государственное бюджетное учреждение науки Объединенный институт высоких температур Российской академии наук (ОИВТ РАН) | Установка для производства гидрата метана |
CN108102760B (zh) * | 2018-01-24 | 2024-08-02 | 南阳理工学院 | 一种生物质固体颗粒成型机 |
CN108410528B (zh) * | 2018-05-30 | 2020-11-24 | 河南理工大学 | 一种用于提高瓦斯水合速率的天然生物质溶液及其制备方法 |
CN113900143B (zh) * | 2021-09-29 | 2023-03-14 | 中国石油化工股份有限公司 | 天然气水合物的属性特征的确定方法、装置和服务器 |
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JPH0453703A (ja) * | 1990-06-22 | 1992-02-21 | Tdk Corp | 湿式粉末成形装置及び湿式粉末成形方法 |
JP2007270029A (ja) | 2006-03-31 | 2007-10-18 | Mitsui Eng & Shipbuild Co Ltd | ガスハイドレートペレットの製造方法及び製造装置 |
JP2009221458A (ja) * | 2008-02-22 | 2009-10-01 | Mitsui Zosen Akishima Kenkyusho:Kk | ガスハイドレートの精製方法 |
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JP2010235868A (ja) | 2009-03-31 | 2010-10-21 | Mitsui Eng & Shipbuild Co Ltd | ガスハイドレートペレット成形装置 |
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EP2692837A4 (en) | 2014-10-01 |
BR112013034023A2 (pt) | 2018-07-10 |
RU2584685C2 (ru) | 2016-05-20 |
EP2692837B1 (en) | 2018-12-26 |
AU2012234629A1 (en) | 2013-11-14 |
AU2012234629B2 (en) | 2017-03-23 |
EP2692837A1 (en) | 2014-02-05 |
JPWO2012132980A1 (ja) | 2014-07-28 |
US9039949B2 (en) | 2015-05-26 |
US20140203471A1 (en) | 2014-07-24 |
RU2013148118A (ru) | 2015-05-10 |
CA2834763A1 (en) | 2012-10-04 |
CA2834763C (en) | 2019-09-24 |
ES2716011T3 (es) | 2019-06-07 |
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