JP2001342472A - Method and apparatus for producing gas hydrate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide both a method and an apparatus for producing a gas hydrate by reacting a gas hydrate formation substance (e.g. methane) with water to efficiently produce a high-concentration gas hydrate, capable of speeding up formation of a gas hydrate. SOLUTION: This apparatus for producing a gas hydrate is characterized in that the apparatus is equipped with a gas hydrate formation reaction device 1 for setting the temperature and pressure of the inside at gas hydrate formation conditions, a methane supplying means (gas hydrate formation substance supplying means) GS for supplying the gas hydrate formation substance such as methane, etc., to the gas hydrate formation reaction device 1 and spray nozzles (spray means) 14 for spraying water on a gas phase G in the gas hydrate formation reaction device 1 and the spray nozzles are mutually opposingly arranged at both ends of the gas hydrate formation reaction device 1 and sprays water on the gas hydrate formation substance opposingly in the right and left directions.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for producing gas hydrate for efficiently producing a high concentration gas hydrate by reacting a gas hydrate forming substance (for example, methane) with water.

[0002]

2. Description of the Related Art At present, as a method of storing and transporting natural gas mainly composed of hydrocarbons such as methane, natural gas is collected from a gas field, cooled to a liquefaction temperature, and liquefied natural gas (LNG). It is a common practice to store and transport in a state where it is kept. However, for example, in the case of methane, which is a main component of liquefied natural gas, liquefaction requires cryogenic conditions such as -162 ° C. In order to store and transport while maintaining such conditions, a dedicated storage device is required. And dedicated transportation means such as an LNG ship. Since the production, maintenance and management of such devices and the like require extremely high costs, low-cost storage and transportation methods that are alternatives to the above methods have been intensively studied. As a result of these studies, a method has been discovered in which natural gas is hydrated to produce a gas hydrate in the solid state (hereinafter referred to as "gas hydrate") and stored and transported in the solid state. Particularly promising. This method does not require cryogenic conditions as in the case of handling LNG, and is relatively easy to handle because it is solid. For this reason, an existing refrigeration system or a slightly improved version of an existing container ship can be used as a storage device or a transportation means, and therefore, it is expected that the cost can be significantly reduced.

[0003] The gas hydrate is a kind of clathrate compound (clathrate compound), and as shown in FIG. 2, a three-dimensional cage-shaped package formed by a plurality of water molecules W (H ₂ O). A crystal in which molecules constituting each component of natural gas, that is, methane (CH ₄ ), ethane (C ₂ H ₆ ), propane (C ₃ H ₈ ), etc., enter into a tangent lattice (clathrate) and are included. It has a structure (the figure shows methane hydrate MH in which methane M is included). The intermolecular distance between the natural gas constituent molecules included in the clathrate is shorter than the intermolecular distance in the gas cylinder when natural gas is charged at a high pressure. This means that natural gas can produce tightly packed solids, for example, under conditions where methane hydrate can be stably present, ie at -30 ° C. and atmospheric pressure (1 kg / cm ² ), The volume can be reduced to about 1/190 compared to the state. As described above, the gas hydrate can be manufactured under the temperature and pressure conditions that can be obtained relatively easily, and can be stably stored.

In this method, natural gas after being received from a gas field is subjected to an acid gas removal step in which an acid gas such as carbon dioxide (CO ₂ ) or hydrogen sulfide (H ₂ S) is removed. It is stored in a gas storage part once in a high pressure state. This natural gas is then hydrated in a hydrate generation step to become gas hydrate. This gas hydrate is a slurry in which water is mixed, and in the subsequent dehydration step, mixed unreacted water is removed, and further adjusted to a predetermined temperature and pressure through a cooling step and a decompression step. In a state, it is sealed in a container such as a container and stored in a storage device. At the time of transportation, the container is loaded as it is on a transportation means such as a container ship and transported to the destination. After landing at the destination, the gas hydrate is returned to a natural gas state through a hydrate decomposition step and sent to each supply point.

Here, an outline of the hydrate generation step will be described. As shown in FIG. 6, an aqueous phase L is formed at the bottom of the hydrate generation reaction device 101, and natural gas (gas hydrate-type substance) is supplied to the aqueous phase L as bubbles K. Supercooled water is sprayed from above onto the gas phase G of the natural gas filled in the apparatus 101 (see symbol SP). Part of the natural gas introduced into the aqueous phase L is absorbed by the aqueous phase L from the gas-liquid interface of the bubbles K, and reacts with water to be converted into gas hydrate. This gas hydrate floats in the aqueous phase L because its density is smaller than that of water. On the other hand, the natural gas in the gas phase G and the water sprayed on the gas phase G react instantaneously to be converted into gas hydrate, and this gas hydrate falls on the water phase L. Then, the generated gas hydrate layer is extracted and collected.

[0006]

However, in the above-mentioned conventional hydrate production apparatus, the surface of the particularly large water particles SP among the water particles SP sprayed into the hydrate production reaction apparatus 101 is not shown in FIG. As shown in (a), there is a possibility that the generated gas hydrate MH may adhere to the skin. This gas hydrate MH
Since the water particles SP contained in the gas do not convert into gas hydrate, the gas hydrate generation efficiency is deteriorated, and the problem that the gas hydrate generation speed of the entire apparatus is reduced is caused.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a method and an apparatus for producing gas hydrate which can speed up the production of gas hydrate.

[0008]

The method for producing gas hydrate according to claim 1 is a method for producing gas hydrate by reacting water and a gas hydrate forming substance in a gas hydrate production reactor. Wherein the hydration reaction is caused by spraying water to the gas hydrate type substance in the gas hydrate generation reaction device in a spray state while facing water from each direction.

In this gas hydrate production method, the sprayed water particles collide with each other, thereby destroying the gas hydrate layer film formed on the surface thereof.

The method for producing gas hydrate according to claim 2 is the method for producing gas hydrate according to claim 1, wherein the water collected at the bottom in the gas hydrate production reactor is recovered. The gas hydrate-type substance is sprayed.

In this method for producing gas hydrate, gas hydrate can be produced efficiently by spraying again water that has not reacted with the gas hydrate-forming substance.

A gas hydrate producing apparatus according to a third aspect of the present invention includes a gas hydrate producing reactor in which the internal temperature and pressure are set under gas hydrate producing conditions, and a gas hydrate producing reactor. A gas hydrate-forming substance supply means for supplying a gas hydrate-forming substance; and a spray means for spraying water into a gas phase in the gas hydrate generation reactor, wherein the spray means comprises the gas hydrate-forming substance. It is characterized by being provided opposite to each other in the production reaction device.

In the gas hydrate producing apparatus, the water particles sprayed facing each other collide with each other, thereby destroying the gas hydrate layer film formed on the surface thereof. The spraying means may be provided on opposing walls in the gas hydrate production reactor, and the spraying direction is not limited to the left and right directions, such as the vertical direction.

According to a fourth aspect of the present invention, there is provided the gas hydrate producing apparatus according to the third aspect, wherein the water collected at the bottom of the gas hydrate producing reactor is recovered. It is characterized by comprising a water circulation means for supplying to each of the spray means.

The gas hydrate producing apparatus can efficiently produce gas hydrate by spraying again water that has not reacted with the gas hydrate-forming substance.

[0016]

Next, embodiments of the present invention will be described with reference to the drawings. In the embodiment described below, an apparatus and a method for consistently producing methane hydrate using a gas hydrate forming substance as methane gas which is a main component of natural gas will be described. But not limited thereto, ethane, propane, butane, krypton, xenon, carbon dioxide and the like. As shown in FIGS. 2A and 2B, the methane hydrate MH is formed in a basket in which water molecules W are arranged in a three-dimensional form (for example, dodecahedral or tetrahedral). Is a kind of clathrate compound (clathrate) containing, for example, produced based on the following reaction formula. Further, when the methane hydrate MH is decomposed, about 0.9 volume of methane hydrate and about 170 methane gas in a standard state are obtained. CH ₄ + 5.7H ₂ O → CH ₄ .5.7H ₂ O + heat of hydration

FIG. 1 is a configuration diagram showing a gas hydrate production apparatus shown as one embodiment of the present invention. FIG.
In the figure, reference numeral 1 denotes a sealed gas hydrate generation reactor, in which a cooling coil 2 is inserted as cooling means (temperature control means) in the gas hydrate generation reactor 1 of the pressure vessel. I have. Thereby, an aqueous phase L described later in the gas hydrate generation reactor 1 is
The cooling temperature can be maintained at, for example, about 1 ° C. within a gas hydrate generation temperature range (for example, 1 to 5 ° C.).
When methane hydrate MH is generated, heat of hydration is generated. On the other hand, since methane hydrate MH is not generated unless it is in a low-temperature and high-pressure state, the gas hydrate generation reactor 1 is provided with cooling means as described above. It is preferable to provide and always cool. In the illustrated example, the cooling coil 2 is used as the cooling means, but is not limited to this. For example, the gas hydrate production reactor 1 may be surrounded by a cooling jacket, and the cooling jacket may be supplied with brine from a brine tank and circulated, or a radiator may be inserted into the gas hydrate production reactor 1, or These may be used in combination.

Reference numeral 3 denotes a water storage tank. When water is introduced from the water storage tank 3 into the gas hydrate generation reaction device 1 via the pipe 4, the water storage tank 3 enters the gas hydrate generation reaction vessel 1. An aqueous phase L (liquid phase) can be formed. The pipe 4 is provided with a water supply pump 5 and a valve 6, and is controlled so that the liquid level S of the aqueous phase L is maintained at a constant level. In addition, the water storage tank 3, the pipe 4, and the water supply pump 5
The water supply means WS is constituted by the above.

On the lower side wall of the gas hydrate production reactor 1, a methane inlet 1a is provided. The methane inlet 1a has a gas storage unit 7 as a methane supply source.
And a methane gas (gas hydrate forming substance) is supplied through a pipe 8. The pipe 8 is provided with a normal valve 9 and a flow control valve 10. The degree of opening of the flow control valve 10 is controlled by a pressure gauge 11 that detects the pressure of a gas phase G (methane gas) described later in the gas hydrate generation reactor 1. Thereby, methane is replenished in the gas hydrate generation reaction vessel 1, and the pressure of the gas phase G is constantly increased to the gas hydrate generation pressure (4 in this example).
0 atm). A methane supply means (gas hydrate forming substance supply means) GS is constituted by the gas storage unit 7 and the pipe 8, and the pressure control means PC in the production reactor is controlled by the pressure gauge 11 and the flow rate control valve 10.
Is configured.

The methane (natural gas containing methane as a main component) supplied to the gas storage unit 7 is collected from a gas field 12 and then subjected to an acidic gas removing step 13 to remove acidic gases such as carbon dioxide and hydrogen sulfide. Is done. Thereafter, the temperature is reduced to a low temperature / high pressure via a compressor or the like, and sent to the gas storage unit 7 to be temporarily stored.

At the bottom of the gas hydrate generation reactor 1, there is provided a water outlet 1b for extracting unreacted water, and the unreacted water extracted from the water outlet 1b is supercooled. Then, it is configured to be supplied again into the gas hydrate production reactor 1. More specifically, spray nozzles (spray means) 14 are provided one by one on the left and right wall portions facing each other in the gas hydrate production reaction device 1, the spray nozzles being arranged so as to face each other. Each spray nozzle 14 and the drain port 1b communicate with each other by a pipe 15 (15a, 15b). A valve 16 is interposed in the pipe 15, and the spray nozzle 14 side is branched into pipes 15a and 15b. A water circulation pump 17, a heat exchanger (cooler) 18 and a valve 19 are sequentially provided in the pipes 15a and 15b, respectively. It is arranged.
The water extracted by the water circulation pump 17 is supplied to the heat exchanger 1
After being supercooled by 8, the gas is supplied from the spray nozzle 14 into the gas phase G (methane atmosphere) in the gas hydrate generation reactor 1 in the form of a spray (see reference symbol SP).

Here, the supercooling means, as shown in FIG.
At least the temperature is lower than an arbitrary point D on the methane hydrate production equilibrium line C (in the direction of arrow X) or the pressure is higher (in the direction of arrow Y). In addition, the area above the generation equilibrium line C (the area shaded for convenience)
Is a hydrate generation region (under hydrate generation conditions). For reference, ethane, propane and butane formation equilibrium lines are also shown. As the heat exchanger (cooler) 18,
For example, a multi-tube heat exchanger having excellent heat conduction efficiency, a coil heat exchanger having a simple structure, and a plate heat exchanger having excellent heat conduction efficiency and easy maintenance can be used. In addition, the water circulation pump 17, the pipe 15, the heat exchanger 18,
Thus, the water circulation means CW is configured.

Here, the spray nozzle 14 is shown in FIG.
As shown in FIG. 1, the injection port is provided on the side of the gas hydrate generation reactor 1 with the injection port directed toward the inside of the gas hydrate generation reactor 1. Water particles SP having an outer diameter of several tens of μm on average (preferably, a smaller particle diameter is better) are jetted toward phase G. As described above, the surface area per unit volume of water, that is, the contact area with the gas phase G is extremely increased by spraying water into the gas phase G in a spray form to form a large amount of water particles SP. Can be. As described above, when the unreacted water extracted from the bottom of the gas hydrate generation reactor 1 is sprayed in the gas hydrate generation reactor 1 by the spray nozzle 14,
It is important to prevent clogging of the spray nozzle 14 by foreign matter. Therefore, a filter 16a for collecting foreign matter such as gas hydrate is provided in the pipe 15,
It is preferable to reliably remove foreign matter from the extracted unreacted water.

A liquid layer outlet 1c is provided near the liquid surface S of the aqueous phase L in the gas hydrate production reactor 1.
The liquid layer discharge outlet 1 c is connected to a gas hydrate dehydrating / cooling / extracting device 30 via a pipe 20. The pipe 20 is provided with a valve 21, an extraction pump 22, and the like as necessary. With such a configuration, the relatively low-density methane hydrate layer MH floating on the liquid surface S is sucked by the extraction pump 22 from the liquid layer extraction port 1c, and
The methane hydrate and water are turned into a slurry, and are transferred to the subsequent process through the pipe 20. That is, the slurry-like methane hydrate (slurry gas hydrate) generated in the gas hydrate generation reactor can be easily supplied by flowing with excess water to the gas hydrate dehydration / cooling / extraction device 30 in the subsequent step. Is possible. Gas hydrate dehydration cooling take-out device 30
In, the excess water contained in the slurry-like methane hydrate is dehydrated, and the excess water is returned to the water storage tank 3 via the pipe 49.

Next, the operation of the above-described gas hydrate manufacturing apparatus, that is, the manufacturing method will be described. The air in the gas hydrate generation reactor 1 is replaced with methane gas in advance, and then the water phase is introduced into the gas hydrate generation reactor 1 from the water storage tank 3 so that the liquid surface S is higher than the liquid layer outlet 1c. L is introduced. This aqueous phase L may contain a stabilizer if necessary. Next, the water phase L in the gas hydrate production reactor 1 is cooled to a predetermined temperature of, for example, about 1 ° C. by the cooling coil 2, and thereafter, the temperature is controlled so as to maintain this temperature.

When the temperature of the aqueous phase L is stabilized at a predetermined temperature, methane in the gas storage unit 7 is continuously introduced as bubbles K from the methane inlet 1a. As a result, at least part of methane is absorbed into the aqueous phase L from the gas-liquid interface of the bubbles K, and reacts with water to be converted into methane hydrate (hydration reaction).
The methane hydrate MH generated by the reaction floats in the aqueous phase L because the density is smaller than the density of water, and the liquid surface S
Form a layer on top. This methane hydrate layer MH
The liquid is extracted from the liquid layer extraction outlet 1 c by the extraction pump 22, and is sent out to the gas hydrate dehydrating cooling and extracting device 30 through the pipe 20. At this time, the methane hydrate is recovered together with the water, so that it is in a slurry state. As the methane hydrate layer MH is extracted from the liquid layer extraction outlet 1c, the liquid level S of the aqueous phase L is lowered, so that new water is discharged from the water storage tank 3 so that the level of the liquid level S is kept constant. The water is supplied into the gas hydrate production reactor 1 via the water supply pump 5. As described above, the slurry-like methane hydrate supplied to the dehydrating / cooling / extracting device 30 after being generated is subjected to the dehydration of the surplus water and the passage through the pipe 49 to the water storage tank 3.
Returned to The dehydrated methane hydrate has a significant amount of water removed and is transported to a predetermined storage facility.

When methane hydrate MH is generated in the gas hydrate generation reactor 1, gas methane becomes solid methane hydrate MH, and the internal pressure decreases. On the other hand, in order to generate methane hydrate at high speed, the conditions in the gas hydrate generation reactor 1 must be set to a lower temperature and higher pressure. Therefore, in order to eliminate the pressure drop of the hydrate production vessel 1 due to the production of methane hydrate, the pressure in the gas hydrate production reactor 1 is continuously detected by the pressure gauge 11 and the flow rate is determined based on the pressure. The opening of the control valve 10 is continuously controlled. Thereby, the required amount of the raw material methane is replenished into the gas hydrate generation reactor 1, and the inside of the gas hydrate generation reactor 1 is maintained at a constant high pressure state, thereby achieving high-speed generation.

On the other hand, unreacted methane gas not absorbed in the aqueous phase L is released from the liquid surface S and accumulates as a gas phase G in the gas hydrate generation reactor 1. Unreacted water is extracted from the bottom of the gas hydrate production reactor 1, supercooled by a heat exchanger 18, and sprayed in a spray form in the gas hydrate production reactor 1 by a spray nozzle 14.

As described above, the water particles SP supercooled by the methane gas filled in the gas hydrate production reactor 1
Is released in large quantities, the contact area of the water particles SP with methane per unit volume is greatly increased, and the hydration reaction occurs immediately, so that methane hydrate is generated at a high rate.

Here, when only one spray nozzle 14 is provided, as shown in FIG.
There is a possibility that the generated methane hydrate MH adheres to the surface of the surface in a skin-like manner. Since the water particles SP contained in the methane hydrate MH do not convert to methane hydrate as they are, the methane hydrate M
It is necessary to remove the epidermis of H. In the present embodiment, as described above, droplets collide with each other by injecting water from both sides in the gas hydrate generation reaction device 1. As a result, as shown in FIG. 5B, the methane hydrate MH of the water particles SP is destroyed and the water particles SP are separated from the methane hydrate MH. It is possible to achieve faster generation of methane hydrate MH.

The generated hydrate falls to the liquid level S and is collected in the same manner as described above. When methane hydrate MH is generated in the gas hydrate generation reactor 1, a large heat of hydration is generated. On the other hand, in order to generate methane hydrate MH at high speed, the conditions in the hydrate generation vessel 1 must be set to a lower temperature and higher pressure state. Therefore, discharging the supercooled water particles SP into the gas hydrate generation reactor 1 also effectively removes the heat of hydration.

When the gas hydrate production reactor 1 is large, there is a possibility that the water at the bottom is in a supercooled state, so this water is taken out and directly, that is, without cooling. The gas hydrate production reactor 1 may be sprayed as it is.

In the above-described embodiment, the bubbles K of methane rise in the aqueous phase L, so that the bubble interface can be constantly brought into contact with new water molecules without being covered with a high-viscosity reaction product. Is promoted. By continuing this operation in a stable state, high-concentration methane hydrate MH can be efficiently and continuously supplied to the dewatering / cooling / extracting device 30.

If the diameter of the water particles SP ejected from the spray nozzle 14 is large, methane hydrate generated on the surface of the water particles impedes the supply of methane, so that the entire water particles SP may become methane hydrate. Can not.
Therefore, by spraying a gas together with water from the spray nozzle 14 to reduce the average particle diameter of the water particles SP to about 10 μm, it is possible to reduce the adhesion of methane hydrate as described above. Examples of the gas include an inert gas that does not react with water or a hydrate-forming substance. The number of spray nozzles 14 is not limited to a pair on the left and right, and a plurality of spray nozzles may be provided.

In general, the reaction between methane and water proceeds at a pressure of 40 atm or higher, for example, when the reaction temperature is 1 ° C. Therefore, the gas hydrate production reactor 1 requires a high-pressure vessel with a pressure resistance of at least 40 atm. When it is desired to carry out the reaction at a higher temperature and lower pressure, it is preferable to add a stabilizer to the aqueous phase L. Examples of stabilizers that can shift the hydration reaction of methane to higher temperature and lower pressure include aliphatic amines such as isobutylamine and isopropylamine; alicyclic ethers such as 1,3-dioxolan, tetrahydrofuran and furan. And cyclobutanone,
Alicyclic ketones such as cyclopentanone; aliphatic ketones such as acetone; Since all of these stabilizers have a hydrocarbon group and a polar group in the molecule, each polar group attracts a water molecule and the hydrocarbon group attracts a methane molecule, thereby reducing the intermolecular distance. It is thought to promote the hydration reaction. For example, by adding aliphatic amines, 10 ° C., 20 kg / cm ² G
At 10 ° C. and 10 kg / cm ² G or less depending on the addition of tetrahydrofuran. These stabilizers are used in an amount of 0.1 to 1000 g of pure water.
It is preferable to add within the range of 10 mol.

The reaction temperature depends on the above-mentioned relation of the production equilibrium.
It is better to be as low as possible. For example, it is preferable to control the aqueous phase temperature in the gas hydrate production reactor 1 to be in the range of 1 to 5 ° C. As a result, the solubility of methane in water can be increased, and the production equilibrium pressure can be reduced. The reaction between water and methane is an exothermic reaction. When the reaction is started in the gas hydrate production reactor 1, the temperature inside the system rises due to heat of hydration, so that the temperature inside the system is always maintained within a predetermined range. It is preferable to control the temperature so that the temperature is controlled.

[0037]

As described above, according to the present invention, water particles sprayed from the right and left in the gas hydrate production reactor collide with each other to form a gas hydrate layer formed on the surface thereof. The membrane is broken and separated. As a result, the water particles can be used as a raw material for the gas hydrate again, and a higher-speed generation of the gas hydrate can be achieved. Further, by spraying again water that has not reacted with the gas hydrate-forming substance, gas hydrate can be efficiently produced.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration example of a gas hydrate production apparatus according to the present invention.

FIG. 2 is a diagram showing a molecular structure of gas hydrate.

FIG. 3 is a production equilibrium diagram of gas hydrate.

FIG. 4 is an enlarged view of the spray means shown in FIG.

FIG. 5A is a schematic diagram showing a state in which a gas hydrate layer film is formed on the surface of water particles, and FIG. 5B is a schematic diagram showing a state in which the gas hydrate layer is separated.

FIG. 6 is a view showing a main part of a conventional gas hydrate manufacturing apparatus.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Gas hydrate formation reaction apparatus 2 Cooling coil 3 Water storage tank 5 Water supply pump 7 Gas storage unit 10 Flow control valve 12 Gas field 13 Acid gas removal process 14 Spray nozzle (spray means) 17 Circulation pump 18 Heat exchanger (cooler) ) 22 Extraction pump 30 Dehydration cooling extraction device MH Methane hydrate (gas hydrate) SP Water particle GS Methane supply means (gas hydrate forming substance supply means) CW Water circulation means

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) C07C 9/04 C10L 3/00 A (72) Inventor Haruhiko Ema 2-1-1 Shinama, Araimachi, Takasago City, Hyogo Prefecture No. Within Takasago Research Laboratory, Mitsubishi Heavy Industries, Ltd. (72) Inventor Shoji Watanabe 2-1-1, Shinhama, Araimachi, Takasago City, Hyogo Prefecture Inside Takasago Research Laboratory, Mitsubishi Heavy Industries, Ltd. (72) Inventor Yuichi Kondo Wadazakicho, Hyogo-ku, Kobe-shi, Hyogo Prefecture 1-1-1, Mitsubishi Heavy Industries, Ltd., Kobe Shipyard (72) Inventor Naoyoshi Fujita 1-1-1, Wadasaki-cho, Hyogo-ku, Kobe, Hyogo Prefecture Mitsubishi Heavy Industries, Ltd.Kobe Shipyard (72) Inventor Takahiro Kimura Hyogo 1-1-1, Wadazakicho, Hyogo-ku, Kobe-shi, Japan Inside Mitsubishi Heavy Industries, Ltd.Kobe Shipyard (72) Inventor Jin Endo God, Hyogo Prefecture City, Hyogo-ku, Wadasaki-cho, 1 Chome, Mitsubishi Heavy Industries, Ltd. Kobe Shipyard & Machinery Works in the F-term (reference) 4H006 AA02 AA04 AC93 AD33 BA51 BB31 BC10 BC11 BD33 BD35 BD52 BD80

Claims (4)

[Claims] 1. A method for producing a gas hydrate by reacting water and a gas hydrate-forming substance in a gas hydrate generation reactor, wherein the gas hydrate-forming substance in the gas hydrate generation reactor is A method for producing a gas hydrate, characterized in that a hydration reaction is caused by spraying water in the form of a spray while facing each other from each direction. 2. The method for producing gas hydrate according to claim 1, wherein the water collected at the bottom in the gas hydrate production reactor is collected and sprayed on the gas hydrate-forming substance. Characteristic gas hydrate production method. 3. A gas hydrate production reactor in which the internal temperature and pressure are set under gas hydrate production conditions, and a gas hydrate for supplying a gas hydrate-forming substance into the gas hydrate production reactor. A rate-forming substance supply means, and a spray means for spraying water into a gas phase in the gas hydrate generation reaction device, wherein the spray means are provided to face each other in the gas hydrate generation reaction device. A gas hydrate producing apparatus. 4. The gas hydrate producing apparatus according to claim 3, further comprising a water circulating unit that collects the water collected at the bottom in the gas hydrate generating reactor and supplies the water to the spray units. A gas hydrate producing apparatus.