US Pat. No. 9,302,239

GAS-LIQUID CIRCULATING TYPE OF HYDRATE REACTOR

Korea Institute Of Indust...

1. A gas hydrate reactor, comprising:
a reactor body configured to be supplied with gas and water to generate a gas hydrate;
an impeller configured to be disposed in the reactor body; and
a bubble generator configured to be disposed in the reactor body,
wherein the gas supplied from the lower portion of the reactor body is jetted into the reactor body through the bubble generator,
wherein a lower end of the reactor body has a shape which has a diameter that decreases downwardly, and the impeller and the
bubble generator are disposed in the lower end of the reactor body,

wherein the bubble generator has a ring shape to surround the impeller, and
wherein the bubble generator has a plurality of jet holes disposed to be inclined to the upper surface of the bubble generator,
such that bubbles of the gas are obliquely jetted through the plurality of jet holes into the reactor body.

US Pat. No. 10,351,790

APPARATUS FOR MOLDING GAS HYDRATE PELLETS

Dongguk University Indust...

1. An apparatus for molding gas hydrate pellets, comprising:a dehydrating unit configured to remove moisture from a slurry state of gas hydrates to transform the slurry state of the gas hydrates to a cake state of the gas hydrates;
a pulverizer in which the cake state of the gas hydrates is pulverized;
a cooler having a rotating shaft provided therein, comprising a plurality of agitation blades installed along a height direction of the rotating shaft and configured to cool the pulverized gas hydrates to a predetermined temperature;
a decompressor configured to decompress the cooled gas hydrates to a predetermined pressure; and
a pellet molder configured to mold the decompressed gas hydrates to pellets,
wherein the pulverizer is configured to pulverize and decrease effective diameters of the gas hydrates converted into the cake after the dehydrating,
wherein the gas hydrates pulverized in the pulverizer to have the effective diameters decreased are supplied to the cooler, and
wherein the pulverizer includes a fixed blade and a wing blade, and the gas hydrates injected into the pulverizer are pulverized by a compressive force between the fixed blade and the wing blade caused by rotation of the wing blade.

US Pat. No. 10,023,821

METHOD AND APPARATUS FOR IMPROVING HEAT TRANSFER AND REACTION EFFICIENCY OF GAS HYDRATE REACTOR USING SCRAPER

KOREA INSTITUTE OF INDUST...

1. A method comprising:supplying gas and water to a reactor body in which gas hydrates are created;
applying a driving force to rotate a scraper assembly which is arranged for rotation within the reactor body by using a scraper driving motor;
actuating a stirring apparatus at a different speed from a rotating speed of the scraper assembly by a speed reducer arranged to surround a rotating bar of the scraper assembly; and
removing gas hydrate particles attached onto an inner surface of the reactor body and an upper cover engaged to the reactor body, by a rotational movement of the scraper assembly relative to the inner surface of the reactor body and the upper cover,
wherein the scraper assembly operates to perform a stirring function,
wherein the stirring apparatus is actuated under a condition with the same center of rotation as the scraper, and
wherein the scraper assembly includes: the rotating bar; a first scraper for scraping the inner surface of the reactor body, the first scraper connected to the rotating bar; and a second scraper for scraping the inner surface of the upper cover, the second scraper connected to the rotating bar.

US Pat. No. 9,839,887

APPARATUS FOR STORING GAS HYDRATE PELLETS

Dongshin Hydraulics Co., ...

1. An apparatus for storing gas hydrate pellets, comprising:
a storage tank having an inlet formed at a top portion thereof for having the gas hydrate pellets injected therein;
a transfer part formed at a lower portion of the storage tank so as to transfer the injected gas hydrate pellets to an outside
of the storage tank;

a rotating shaft vertically formed in the storage tank;
a plurality of division plates coupled to the rotating shaft to partition an internal space of the storage tank, each having
a bottom portion thereof formed above a top portion of the transfer part;

an extension plate coupled to a lower portion of each of the division plates in such a way that the extension plate is movable
up and down; and

a guide formed at an upper portion of the transfer part and configured to guide the extension plate so as to allow the extension
plate to be revolved by rotation of the rotating shaft without an interruption with the transfer part.

US Pat. No. 9,856,723

EXPERIMENT APPARATUS FOR ESTIMATING GROUND DEFORMATION DURING GAS HYDRATE RECOVERY

Korea Gas Corporation, G...

1. An experiment apparatus comprising:
a high-pressure cell having a space in which a sample containing gas hydrate is stored;
a recovery member inserted into the sample so as to recover the gas hydrate contained in the sample to the outside;
a transparent member; and
a transparent region formed at one or more parts facing the space of the high-pressure cell, such that the sample stored in
the space is observed from outside,

wherein the transparent region is formed by forming a through-hole at a part of the high-pressure cell, facing the space,
and fixing the transparent member to the through-hole, the transparent member and high-pressure cell being different bodies,
and

the part of the high-pressure cell includes a portion that defines a first bump on an inner surface of the through-hole, and
the transparent member includes a portion that defines a second bump along a circumference of the transparent member, where
the second bump of the transparent member engages the first bump of the part of the high-pressure cell to limit movement of
the transparent member into the high-pressure cell.

US Pat. No. 9,744,508

APPARATUS FOR REVAPORIZING GAS HYDRATE PELLETS

Dongshin Hydraulics Co., ...

1. An apparatus for regasifying gas hydrate pellets, comprising:
a cylinder;
a piston coupled to an inside of the cylinder and configured to reciprocate up and down;
a pellet providing part housing the gas hydrate pellets, coupled to an one side of the cylinder in such a way that supply
of gas hydrate pellets to the cylinder is adjusted by having one end thereof opened and closed by reciprocation of the piston;

a pressure adjusting space having one end thereof coupled to a lower portion of the cylinder;
a door formed in the pressure adjusting space and configured to define the pressure adjusting space;
a transfer part having one end thereof coupled to the other end of the pressure adjusting space and configured to transfer
the gas hydrate pellets; and

a regasification part coupled to the other end of the transfer part and having heating water therein to allow regasification
of the transferred gas hydrate pellets.

US Pat. No. 9,839,898

FUEL PROCESSOR

Korea Gas Corporation, D...

1. A fuel processor, comprising:
a steam reformer unit configured to be disposed at an upper portion in a casing;
a heat exchanger unit configured to be disposed at a lower portion of the steam reformer unit;
a high temperature shift reforming unit configured to be disposed at a lower portion of the heat exchanger unit;
a low temperature shift reforming unit configured to be disposed while enclosing an outer portion of the high temperature
shift reforming unit; and

a heat exchange chamber configured to be disposed at a lower portion of the high temperature shift reforming unit and exchange
heat between reformed gas and a heat exchange fluid supplied through a channel part formed to drain the reformed gas and combustion
gas and supply the heat exchange fluid.

US Pat. No. 9,726,656

EXPERIMENT APPARATUS FOR ESTIMATING GROUND DEFORMATION DURING GAS HYDRATE RECOVERY

Korea Gas Corporation, G...

1. An experiment apparatus comprising:
a high-pressure cell having a space in which a sample containing gas hydrate is stored
a pressurizing body comprising:
a hollow body mounted to move in one direction in the high-pressure cell;
a first cap mounted at an opened end of the body; and
a second cap mounted at the other opened end of the body so as to face the surface of the sample, and
the first and second caps are formed of a transparent material, wherein the pressurizing body is mounted to move in one direction
in the high-pressure cell, and configured to move to pressurize the sample stored in the space, wherein the surface of the
sample is observable along the longitudinal direction of the pressurizing body through the pressurizing body from outside;
and

a recovery member including a flow path inserted into the sample so as to recover the gas hydrate contained in the sample
to the outside.

US Pat. No. 10,030,908

NATURAL GAS LIQUEFACTION PROCESS

KOREA GAS CORPORATION, G...

1. A natural gas liquefaction process where natural gas is pre-cooled through heat exchange with a refrigerant in a first heat exchange region and the pre-cooled natural gas is liquefied through heat exchange with a refrigerant in a second heat exchange region by using a single closed-loop refrigeration cycle adopting a mixed refrigerant, the closed-loop refrigeration cycle comprising:firstly separating the refrigerant from a partially condensed mixed refrigerant into a first refrigerant part separated as a liquid phase refrigerant part and a second refrigerant part separated as a gas phase refrigerant part;
pre-cooling the natural gas in the first heat exchange region by using the first refrigerant part;
liquefying the pre-cooled natural gas in the second heat exchange region by using the second refrigerant part;
firstly compressing the first refrigerant part which pre-cools the natural gas through the pre-cooling;
secondly compressing the second refrigerant part which liquefies the natural gas through the liquefying; and
after the respective first compressing and the second compressing, firstly mixing the respective first compressed first refrigerant part and the second compressed second refrigerant part,
wherein the first refrigerant part and the second refrigerant part remain separated which respectively pass through independent loops without being mixed with each other again, until after the respective first compressing and the second compressing;
wherein the first refrigerant part and the second refrigerant part respectively passing through the independent loops prior to the respective first compression and the second compression are given to different pressure conditions reflecting different thermodynamic characteristics due to different compositions thereof.

US Pat. No. 10,308,326

LNG TANK CONTAINER TRANSPORT SHIP, AND TRANSPORT METHOD USING SAME

KOREA GAS CORPORATION, D...

1. An LNG tank container transport ship, comprising:a cargo compartment disposed in the ship and configured to house a plurality of LNG tank containers containing LNG;
a loading-unloading position disposed in the cargo compartment and configured to permit an external vehicle to come in from outside the ship for loading and unloading at least one of the plurality of LNG tank containers at the loading-unloading position;
a crane located in the cargo compartment and configured to move the at least one LNG tank container inside the cargo compartment, wherein the crane comprises a holding unit configured to hold the at least one LNG tank container and a vertical drive unit configured to move the at least one LNG tank container upward and downward;
at least one primary conveying frame configured to guide the crane to move in a first direction on a horizontal plane; and
at least one secondary conveying frame connected to the primary conveying frame and configured to guide the crane to move in a second direction on the horizontal plane, the second direction intersecting the first direction.

US Pat. No. 10,532,899

APPARATUS FOR LOADING AND UNLOADING LNG TANK CONTAINER

Korea Gas Corporation, D...

1. An apparatus for loading and unloading an LNG tank container, comprising:a base securely disposed on the ground;
a transfer cart movable forward/backward between a location in front of the base and the base, the transfer cart comprising a lower cart movable along a guide rail and a liftable unit disposed on the lower cart to be moved up and down;
a cart transfer unit disposed between the base and the transfer cart to move the transfer cart forward/backward; and
a clamping unit disposed at each of front and rear head portions of the liftable unit to clamp and unclamp the LNG tank container, the clamping unit being disposed on a clamp mounting frame movable laterally inside each of the head portions,
wherein the guide rail comprises: a guide rail disposed on the ground in front of the base to support and guide wheels disposed under front right and left columns of the lower cart; and a guide rail disposed on both side surfaces of the base to be spaced apart from the ground and supporting and guiding wheels disposed under rear right and left columns of the lower cart.

US Pat. No. 10,487,984

REMOTE NATURAL GAS SUPPLY STATION USING LNG TANK CONTAINER AND METHOD FOR SUPPLYING NATURAL GAS USING THE SAME

KOREA GAS CORPORATION, S...

1. A natural gas supply station comprising:an installation structure comprising an elevated platform structure above a ground surface supporting a liquefied natural gas (LNG) tank container;
a loading and unloading assembly to facilitate loading and unloading of the LNG tank container from the installation structure, wherein the loading and unloading assembly comprises:
at least one moving part that moves along grooves formed on the platform structure which guide the at least one moving part to reciprocate on the installation structure in a first and second direction between a front end and a rear end of the installation structure,
an at least one support part exterior to the installation structure, is coupled to the at least one moving part by a connection member, wherein the connection member comprises at least one longitudinal bar that moves together with the moving part, and wherein the at least one support part engages the LNG tank container to provide exterior support to the LNG tank container when the LNG tank container is moved away from the installation structure, wherein the at least one longitudinal bar within the connection member enables the at least one support part to move together with the at least one moving part during the loading and the unloading of the LNG tank container from the installation structure, and wherein the loading and unloading assembly enables the LNG tank container to move reciprocatively in the first direction when the LNG tank container is unloaded from a transport vehicle, and in the second direction when the LNG tank container is loaded to the transport vehicle; and
a gas vaporizer coupled to the LNG tank container through a pipe to receive liquefied natural gas from the LNG tank container and to vaporize the liquefied natural gas prior to supply to consumer.

US Pat. No. 10,921,232

METHOD FOR CALCULATING PERMEABILITY OF POROUS MEDIUM BY USING ANALYSIS OF FRICTION FLOW CHARACTERISTIC VARIABLE IN POROUS MEDIUM

KOREA GAS CORPORATION, D...

1. A method of calculating permeability of a porous medium, the method comprising:obtaining hydraulic diameters and friction factor-Reynolds number relationships of a plurality of reference porous media;
deriving a hydraulic diameter-friction factor-Reynolds number correlation between the hydraulic diameters and the friction factor-Reynolds number relationships; and
obtaining permeability of a porous medium to be predicted, by using the hydraulic diameter-friction factor-Reynolds number correlation.

US Pat. No. 10,914,426

LNG FUELING STATION AND LNG FUELING METHOD USING LNG TANK CONTAINER

Korea Gas Corporation, S...

1. A liquefied natural gas (LNG) fueling station, comprising:an installation part comprising:
a base mounted on a ground in order to receive an LNG tank container; and
a first pair of linear grooves formed on the base, and a second pair of linear grooves formed on the ground, a direction along the first and second pairs of linear grooves oriented parallel to each other;
a supply part configured to supply liquefied natural gas from the LNG tank container received on the installation part to an object; and
a loading and unloading assembly configured to load or unload the LNG tank container from a transporting equipment by moving together with the LNG tank container between the installation part and the transporting equipment,
wherein the loading and unloading assembly comprises:
a movable part guided by the first pair of linear grooves to reciprocate linearly on the installation part in a first direction or a second direction between a front end and a rear end of the installation part, and
a support part guided by the second pair of linear grooves and connected to the movable part through a connection structure to move together with the movable part, wherein the support part engages the LNG tank container to provide support to the LNG tank container during the loading and the unloading of the LNG tank container,
wherein the loading and unloading assembly enables the LNG tank container to move in the first direction when the LNG tank container is unloaded from the transporting equipment and in the second direction when the LNG tank container is loaded to the transporting equipment, by moving together with the LNG tank container in the first direction or second direction, respectively, and
wherein the liquefied natural gas is supplied to the object at a consumer site after completing installing the LNG tank container on the installation part through the loading and unloading assembly and transferring the liquefied natural gas to the object at the consumer site through the supply part.