摘要:
The present invention relates to a device and a method for processing boil-off gas in a liquefied gas regasification system and, more particularly, to a device and a method for processing boil-off gas in a liquefied gas regasification system, wherein, even if there is no or little amount of regasified gas to be sent in a liquefied gas regasification system, boil-off gas can be reliquefied and recollected. A device for processing boil-off gas in a liquefied gas regasification system according to the present invention is a boil-off gas processing device for processing boil-off gas generated in a liquefied gas regasification system, the boil-off gas processing device comprising: a fuel compressor for compressing boil-off gas at a pressured required by a fuel consumer; a high-pressure compressor installed at the rear end of the fuel compressor in series with the fuel compressor so as to compress the low-pressure boil-off gas, which has been compressed by the fuel compressor, at a pressure required by a regasified gas consumer; a low-temperature heat exchanger for cooling the high-pressure boil-off gas compressed by the high-pressure compressor; a pressure-reducing device for reducing the pressure of the high-pressure boil-off gas, which has been cooled by the low-temperature heat exchanger, to the inner pressure of a liquefied gas storage tank for storing the liquefied gas; and a liquefied gas drum for separating flash gas generated by the pressure-reducing device in the pressure-reducing process, wherein liquid-state reliquefied boil-off gas separated from the liquefied gas drum is recollected into the liquefied gas storage tank.
摘要:
The present invention relates to a system for circulating air through double pipes for supplying gas, the system including: double pipes connected to a gas handling device and supplied with gas; a gas supply unit for supplying gas to the gas handling device through an inner pipe of the double pipes; an air supply unit for supplying air through an outer pipe of the double pipes; and an air suctioning means for suctioning and circulating the air, which is supplied to the outer pipe by the air supply unit, by the introduction of a high pressure fluid. According to the present invention, rather than circulating air through the outer pipe of the double pipes by a fan as in the prior art, air can be circulated through the double pipes for gas supply by a simpler structure and more effective configuration.
摘要:
The present invention relates to an apparatus and a method for reliquefaction of boil-off gas generated in a liquefied gas storage tank applied to a vessel. The apparatus for reliquefaction of boil-off gas for a vessel, according to the present invention, which is a reliquefaction apparatus for reliquefying boil-off gas generated in a liquefied gas storage tank installed on a vessel, comprises: a compression unit for compressing the boil-off gas discharged from the storage tank; and a heat exchanger for heat-exchanging the compressed boil-off gas compressed by the compression unit with the boil-off gas discharged from the storage tank, wherein the apparatus for reliquefaction of boil-off gas for a vessel further comprises: a first expansion means for dividing the boil-off gas passing through the heat exchanger into at least two flows including a first flow and a second flow, and expanding the divided first flow; a first intercooler for cooling the second flow remaining after the division of the first flow by using the first flow expanded by the expansion means as a refrigerant; and a receiver for receiving a second flow having passed through the first intercooler, in which a downstream pressure of the compression unit is controlled by a flow discharged from the receiver.
摘要:
A liquefied gas storage tank and a manufacturing method therefor are disclosed. According to the present invention, in the liquefied gas storage tank, the material of a membrane, which is adjacent to a region in which a liquid dome is installed, is different from the material of a membrane, which is not adjacent thereto, such that the liquefied gas storage tank can effectively respond to the thermal deformation generated during the storage of liquefied gas.
摘要:
The present invention relates to an insulation structure, for a liquefied gas cargo hold, having an anchor strip removed, a cargo hold comprising the insulation structure, and a liquefied gas carrier comprising the cargo hold. A thermal protection member is substituted for an existing anchor strip, thereby effectively preventing damage on an upper insulating panel, due to a hot gas and heat transfer during welding of a membrane, by means of the thermal protection member as well as enhancing the fixing force of the membrane. The weight of a cargo hold can be reduced by means of forming the thermal protection member from a material in which aluminum foil is covered with glass cloth. And by means of removing an existing SUS anchor strip, rivet processing is not required and thus constructability can be enhanced.
摘要:
A liquefied gas storage tank having insulation parts and a method for arranging the insulation parts are disclosed. Disclosed are the liquefied gas storage tank having the insulation parts and the method for arranging the insulation parts, the liquefied gas storage tank being capable of improving durability against the impact generated by liquefied gas since insulation panels, which are arranged in the insulating parts for the liquefied gas storage tank, have different densities according to: a load due to the mass of the liquefied gas stored in the liquefied gas storage tank; and the impact generated by sloshing.
摘要:
Disclosed is a ship including a storage tank for storing a liquefied gas. The ship includes: an boil-off gas heat exchanger installed on a downstream of the storage tank such that compressed boil-off gas (hereinafter, referred to as "first fluid") is made to exchange heat and cooled using boil-off gas, which is discharged from the storage tank, as a refrigerant; a compressor installed on a downstream of the boil-off gas heat exchanger so as to compress a part of the boil-off gas discharged from the storage tank; an extra compressor installed on a downstream of the boil-off gas heat exchanger in parallel with the compressor so as to compress the other part of the boil-off gas discharged from the storage tank; a refrigerant heat exchanger for additionally cooling the first fluid that is cooled by the boil-off gas heat exchanger; a refrigerant decompressing device which expands the second fluid, which is sent to the refrigerant heat exchanger (hereinafter, referred to as "second fluid") and cooled by the refrigerant heat exchanger, and then sends the second fluid back to the refrigerant heat exchanger; a first decompressing device which expands a part of the first fluid, which is cooled by the boil-off gas heat exchanger and by the refrigerant heat exchanger; and a third decompressing device which expands the remaining part of the first fluid, which is cooled by the boil-off gas heat exchanger and by the refrigerant heat exchanger, and sends the expanded remaining part of the first fluid back to the refrigerant heat exchanger, wherein the refrigerant heat exchanger heat-exchanges the first fluid to cool the first fluid, using the second fluid, a fluid expanded by the refrigerant decompressing device, and a fluid decompressed by the third decompressing device as a refrigerant; the first fluid is boil-off gas compressed by the compressor or is a confluent flow of the boil-off gas compressed by the compressor and the boil-off gas compressed by the extra compressor; and the second fluid is the boil-off gas compressed by the extra compressor or a confluent flow of the boil-off gas compressed by the compressor and the boil-off gas compressed by the extra compressor.
摘要:
A method for producing pressurized liquefied natural gas and a production system therefor are provided. The method for producing pressurized liquefied natural gas includes: performing a dehydration process (S11) to remove water from natural gas supplied from a natural gas field, without a process of removing acid gas from the natural gas; and performing a liquefaction process (S12) to produce pressurized liquefied natural gas by liquefying the natural gas, which has undergone the dehydration process, at a pressure of 13 to 25 bar and a temperature of -120 to - 95°C, without a process of fractionating natural gas liquid (NGL). Accordingly, it is possible to reduce plant construction costs and maintenance expenses and reduce LNG production costs. In addition, it is possible to guarantee high economic profit and reduce payback period in small and medium-sized gas fields, from which economic feasibility could not be ensured by the use of a conventional method.