WO2016021990A1 - Injection type apparatus for liquefying natural gas equipped with liquefied natural gas circulator using pressurized gas - Google Patents

Injection type apparatus for liquefying natural gas equipped with liquefied natural gas circulator using pressurized gas Download PDF

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Publication number
WO2016021990A1
WO2016021990A1 PCT/KR2015/008309 KR2015008309W WO2016021990A1 WO 2016021990 A1 WO2016021990 A1 WO 2016021990A1 KR 2015008309 W KR2015008309 W KR 2015008309W WO 2016021990 A1 WO2016021990 A1 WO 2016021990A1
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Prior art keywords
natural gas
liquefied natural
circulator
injection
gas
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PCT/KR2015/008309
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French (fr)
Korean (ko)
Inventor
장대준
구두먼드 하네스 베르간폴
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주식회사래티스테크놀로지
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Publication of WO2016021990A1 publication Critical patent/WO2016021990A1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/0002—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the fluid to be liquefied
    • F25J1/0022—Hydrocarbons, e.g. natural gas
    • F25J1/0025—Boil-off gases "BOG" from storages
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C5/00—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/0002—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the fluid to be liquefied
    • F25J1/0022—Hydrocarbons, e.g. natural gas
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/02—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
    • F25J1/0243—Start-up or control of the process; Details of the apparatus used; Details of the refrigerant compression system used
    • F25J1/0257—Construction and layout of liquefaction equipments, e.g. valves, machines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2205/00—Processes or apparatus using other separation and/or other processing means
    • F25J2205/20—Processes or apparatus using other separation and/or other processing means using solidification of components
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2210/00—Processes characterised by the type or other details of the feed stream
    • F25J2210/04—Mixing or blending of fluids with the feed stream
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2210/00—Processes characterised by the type or other details of the feed stream
    • F25J2210/06—Splitting of the feed stream, e.g. for treating or cooling in different ways
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2210/00—Processes characterised by the type or other details of the feed stream
    • F25J2210/40—Air or oxygen enriched air, i.e. generally less than 30mol% of O2
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2210/00—Processes characterised by the type or other details of the feed stream
    • F25J2210/42—Nitrogen
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2210/00—Processes characterised by the type or other details of the feed stream
    • F25J2210/50—Oxygen
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2220/00—Processes or apparatus involving steps for the removal of impurities
    • F25J2220/60—Separating impurities from natural gas, e.g. mercury, cyclic hydrocarbons
    • F25J2220/64—Separating heavy hydrocarbons, e.g. NGL, LPG, C4+ hydrocarbons or heavy condensates in general
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2220/00—Processes or apparatus involving steps for the removal of impurities
    • F25J2220/60—Separating impurities from natural gas, e.g. mercury, cyclic hydrocarbons
    • F25J2220/66—Separating acid gases, e.g. CO2, SO2, H2S or RSH
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2235/00—Processes or apparatus involving steps for increasing the pressure or for conveying of liquid process streams
    • F25J2235/04—Processes or apparatus involving steps for increasing the pressure or for conveying of liquid process streams using a pressure accumulator
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2235/00—Processes or apparatus involving steps for increasing the pressure or for conveying of liquid process streams
    • F25J2235/60—Processes or apparatus involving steps for increasing the pressure or for conveying of liquid process streams the fluid being (a mixture of) hydrocarbons
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2245/00—Processes or apparatus involving steps for recycling of process streams
    • F25J2245/02—Recycle of a stream in general, e.g. a by-pass stream
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2245/00—Processes or apparatus involving steps for recycling of process streams
    • F25J2245/42—Processes or apparatus involving steps for recycling of process streams the recycled stream being nitrogen
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2290/00—Other details not covered by groups F25J2200/00 - F25J2280/00
    • F25J2290/34—Details about subcooling of liquids
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2290/00—Other details not covered by groups F25J2200/00 - F25J2280/00
    • F25J2290/62—Details of storing a fluid in a tank

Definitions

  • the present invention relates to an injection-type natural gas liquefaction apparatus using a liquefied natural gas circulator using pressurized gas, and more particularly, to liquefied natural gas liquefied in the injection-type liquefaction apparatus using pressurized gas back to the injection-type liquefaction apparatus.
  • the present invention relates to an injection type natural gas liquefaction apparatus to which a liquefied natural gas circulator using a pressurized gas that uses liquefied natural gas circulated to liquefy natural gas is provided.
  • the natural gas liquefaction method has a problem that the system is complicated, requires a lot of power, a power supply network to supply power, and has a high initial investment cost.
  • FIG. 1 is a view showing a natural gas liquefaction apparatus using the latent heat of cryogenic liquid to liquefy natural gas using the latent heat of evaporation of the proposed cryogenic cooling liquid (liquid nitrogen, liquefied oxygen, liquefied air) to solve the above problems. .
  • the natural gas liquefaction apparatus using the latent heat of the cryogenic liquid is natural gas is liquefied by the ultra-low temperature cooling liquid in the high pressure liquefied natural gas producer, the high pressure liquefied natural gas is further cooled in the supercooling unit (high pressure liquefied natural gas subcooler), The subcooled liquefied natural gas produces low pressure liquefied natural gas through an expansion valve.
  • the high molecular weight hydrocarbon and carbon dioxide becomes a solid at a low temperature, it is necessary to remove the high molecular weight hydrocarbon and carbon dioxide for the smooth operation of the device.
  • the stream of natural gas can be cooled down slightly and then separated into condensate, but in the case of carbon dioxide, it is difficult to remove only by lowering the temperature.
  • the pretreatment system 1 including the amine absorption tower should be fitted and removed.
  • the pretreatment method requires a lot of initial investment costs, there is a problem in that the operation is complicated and applied only to large facilities.
  • FIG. 2 is a view showing a spray-type natural gas liquefaction apparatus using the latent heat of cryogenic liquid to liquefy natural gas using the latent heat of evaporation of cryogenic liquid.
  • the spray-type natural gas liquefaction apparatus using the latent heat of the cryogenic liquid is liquefied natural gas using the latent heat of evaporation of the cryogenic cooling liquid as described above, but the cryogenic cooling liquid is vaporized and the natural gas is liquefied as a whole.
  • the liquefied natural gas circulated by the liquefied natural gas circulating pump (2) is supercooled by an ultra low temperature cooling liquid in the subcooling unit (high pressure liquefied natural gas subcooler) 420, and the supercooled liquefied natural gas circulated by subcooling It is injected from the injection liquefaction unit 200 to liquefy the natural gas.
  • the subcooling unit high pressure liquefied natural gas subcooler
  • the above injection type natural gas liquefaction apparatus can be introduced into the liquefied natural gas circulation pump (2) or the subcooling unit (supercooler) 420, the solid material by the high molecular weight hydrocarbon and carbon dioxide, solid removal unit (solid filter) There is a problem in that the solid is periodically removed by mounting the (410).
  • the pretreatment system 3 which removes carbon dioxide at a low concentration like a natural gas liquefaction apparatus using latent heat of the cryogenic liquid shown in FIG. 1.
  • the present invention has been made to solve the above problems, an object of the present invention in the injection-type natural gas liquefaction apparatus, in place of the liquefied natural gas circulation pump of pressure using a natural gas or an external gas containing pressure gas A liquefied natural gas circulator for circulating liquefied natural gas by control, and the injection-type natural gas to which the liquefied natural gas circulator using the pressurized gas which liquefies natural gas by injecting the liquefied natural gas circulated by the liquefied natural gas circulator It is to provide a liquefaction apparatus.
  • the injection-type natural gas liquefaction apparatus to which the liquefied natural gas circulator using the pressurized gas which concerns on this invention is supplied;
  • a liquefied natural gas circulator for receiving a saturated liquefied natural gas from the jet liquid liquefied part by controlling the pressure or circulating the saturated liquefied natural gas under the control of pressure to circulate the liquefied natural gas;
  • a rear end formed at a rear end of the liquefied natural gas circulator, the rear end including a supercooling unit receiving supersaturated liquefied natural gas from the liquefied natural gas circulator and forming a supercooled liquefied natural gas.
  • an injection unit for receiving the supercooled liquefied natural gas from the unit and injecting the liquid into the injection type liquefied unit, wherein the supercooled liquefied natural gas injected by the injection unit is used to liquefy the low pressure expanded natural gas.
  • the liquefied natural gas circulator is characterized in that the pressure is controlled by the pressurized gas flowing in, out from the outside.
  • the liquefied natural gas circulator may include a circulating tank into which a saturated liquefied natural gas flows in or out; An inlet valve for controlling the saturated liquefied natural gas flowing into the circulation tank from the jet liquid liquefaction unit; An outlet valve for controlling the saturated liquefied natural gas flowing out from the circulation tank to the rear end; A pressure valve for controlling the pressurized gas introduced into the circulation tank from the outside; And an exhaust valve controlling the pressurized gas flowing out from the circulation tank to the outside.
  • the rear end may further include a solid removal unit for removing solids contained in the saturated liquefied natural gas circulated from the liquefied natural gas circulator.
  • the injection-type natural gas liquefaction apparatus using the liquefied natural gas circulator using the pressurized gas is characterized in that it comprises a liquefied natural gas discharge unit for supplying the liquefied natural gas to the outside.
  • the injection-type natural gas liquefaction apparatus using the liquefied natural gas circulator using the pressurized gas to form a low-pressure expansion natural gas by reducing the pressure received natural gas and further includes an expansion valve for supplying a low-pressure expansion natural gas to the injection type liquefaction unit Characterized in that.
  • the injection type natural gas liquefaction apparatus using the liquefied natural gas circulator using the pressurized gas is characterized in that the liquefied natural gas circulator is formed in a plurality of parallel structure.
  • the injection type natural gas liquefaction apparatus to which the liquefied natural gas circulator using the pressurized gas is characterized in that the supercooling portion is formed in the injection type liquefaction unit.
  • a liquefied natural gas circulating pump cryogenic pump
  • the injection-type natural gas liquefaction apparatus to which the liquefied natural gas circulator using the pressurized gas according to the present invention has an advantage that there is no clogging due to a solid material including carbon dioxide solid.
  • the injection-type natural gas liquefaction apparatus using the liquefied natural gas circulator using the pressurized gas is moved to the injection-type liquefaction unit after use, when using natural gas or liquefied external gas to control the pressure of the liquefied natural gas circulator By liquefying, there is no need to further provide a tank for storing natural gas or external gas separately.
  • the injection-type natural gas liquefaction apparatus using the liquefied natural gas circulator using the pressurized gas according to the present invention has the advantage that continuous operation is possible when the liquefied natural gas circulator is formed and operated in parallel.
  • the injection-type natural gas liquefaction apparatus using the liquefied natural gas circulator using the pressurized gas has an advantage that the configuration of the natural gas liquefaction apparatus is simplified by providing a subcooling part inside the injection-type liquefaction unit for supercooling the liquefied natural gas. There is this.
  • FIG. 1 is a view showing a natural gas liquefaction apparatus using the latent heat of the cryogenic liquid.
  • FIG. 2 is a view showing a spray-type natural gas liquefaction apparatus using the latent heat of the cryogenic liquid.
  • FIG. 3 is a view showing a spray-type natural gas liquefaction apparatus applied with a liquefied natural gas circulator using a pressurized gas according to the present invention.
  • Figure 4 is another view showing the injection-type natural gas liquefaction apparatus applied to the liquefied natural gas circulator using a pressurized gas according to the present invention.
  • FIG. 5 is a view showing a first embodiment of the injection-type natural gas liquefaction apparatus to which the liquefied natural gas circulator using the pressurized gas according to the present invention is applied.
  • FIG. 6 is a view showing a second embodiment of the injection-type natural gas liquefaction apparatus to which the liquefied natural gas circulator using the pressurized gas according to the present invention is applied.
  • the liquefied natural gas circulator 300 which controls the pressure using a gas or an external gas, and circulates the liquefied natural gas (subcooled supercooled liquefied natural gas past the subcooler) to the injection type liquefied unit 200 by the controlling pressure.
  • the liquefied natural gas circulated by the liquefied natural gas circulator 300 is injected through the injection unit 210 provided in the injection type liquefaction unit 200 to liquefy natural gas.
  • the liquefied liquefied gas unit 200 to form a gas the saturated liquefied natural gas is introduced from the liquefied liquefied gas unit 200 under the control of the pressure, and the saturated liquefied natural gas flows out and circulated to the sprayed liquefied liquid unit 200.
  • the supercooling unit 420 is formed at the rear end of the liquefied natural gas circulator 300 and the liquefied natural gas circulator 300, and is supercooled by receiving a saturated liquefied natural gas from the liquefied natural gas circulator 300 to form a supercooled liquefied natural gas. It includes a rear end 400, including.
  • the injection type liquefaction unit 200 receives the subcooled liquefied natural gas from the subcooling unit 420 and injects through the injection unit 210 formed on the upper surface to cool the low-pressure expansion natural gas to saturate liquefied natural gas Will form.
  • the injection-type natural gas liquefaction apparatus 1000 to which the liquefied natural gas circulator using the pressurized gas according to the present invention is applied to circulate liquefied natural gas or supercooled liquefied natural gas in the conventional injection-type natural gas liquefaction apparatus shown in FIG. 2.
  • the cryogenic liquefied natural gas circulating pump (2) is provided with the liquefied natural gas circulator 300, using the liquefied natural gas circulator 300 to circulate the supercooled liquefied natural gas to the injection type liquefaction unit 200 It is characterized by.
  • the liquefied natural gas circulator 300 of the injection-type natural gas liquefaction apparatus 1000 to which the liquefied natural gas circulator using the pressurized gas according to the present invention circulates the saturated liquefied natural gas back to the injection-type liquefaction unit 200.
  • saturated liquefied natural gas is produced.
  • control of the pressure of the liquefied natural gas circulator 300 is characterized in that for controlling the pressure by the pressurized gas flowing in and out from the outside.
  • the pressurized gas may include a natural gas supplied to be liquefied or an external gas that is easily liquefied.
  • the external gas may be a pretreated natural gas or an inert nitrogen gas, and the like. Of course, the embodiment of the external gas is possible.
  • the liquefied natural gas circulator 300 includes a circulating tank 310, the saturated liquefied natural gas flows in or out.
  • the liquefied natural gas circulator 300 is the inlet valve 320 and the circulating tank 310 for controlling the saturated liquefied natural gas flowing into the circulation tank 310 from the injection type liquefaction unit 200 It includes an outlet valve 330 for controlling the saturated liquefied natural gas flowing out to the rear end 400.
  • the pressure valve 340 and the circulation tank 310 for controlling the pressurized gas flowing into the circulation tank 310 from the outside for pressure control for the oil, the entrance and exit of the saturated liquefied natural gas in the circulation tank 310 It includes an exhaust valve 350 for controlling the pressurized gas flowing out from the).
  • the liquefied natural gas circulator 300 circulates the saturated liquefied natural gas into or circulates into the circulating tank 310 by controlling the pressure of the circulating tank 310 by opening or closing the valve and pressurized gas.
  • the liquefied natural gas circulator 300 circulates the saturated liquefied natural gas from the spray type liquefied tank 200 ) Into an inflow mode and an outflow mode for outflow to saturate the saturated liquefied natural gas in the circulation tank 310 to the injection type liquefaction unit 200 again.
  • the pressure valve 340 to which the pressurized gas is supplied is closed, but the pressurized gas in the circulation tank 310 is discharged.
  • the exhaust valve 350 for performing the control is opened.
  • outlet valve 330 is closed and the inlet valve 320 is opened, so that the circulation tank 310 receives the saturated liquefied natural gas from the injection type liquefaction unit 200.
  • the pressure of the pressurized gas in the circulation tank 310 is released by the opening of the exhaust valve 350 and the pressure is lowered.
  • the saturated liquefied natural gas is injected from the injection type liquefaction unit 200 by the pressure difference. Flows into.
  • the exhaust valve 350 is closed by the saturated liquid liquefied natural gas flowing from the injection type liquefaction unit 200 when the level inside the circulation tank 310 rises to a desired level and reaches a desired pressure balance. It is recommended but not limited to.
  • the exhaust valve 350 is closed to discharge the saturated liquefied natural gas in the circulation tank 310 to the rear end 400, while the pressure valve 340 is closed.
  • the pressurized gas By opening the pressurized gas into the circulation tank 310 to increase the pressure of the circulation tank 310.
  • inlet valve 320 is closed and the outlet valve 330 is opened to flow out.
  • the pressure inside the circulation tank 310 is increased by the pressurized gas introduced through the pressure valve 340, and the saturated liquefied natural gas stored in the circulation tank 310 is discharged to the rear end by the pressure difference. .
  • the injection-type natural gas liquefaction apparatus 1000 to which the liquefied natural gas circulator using the pressurized gas according to the present invention has a pressurized gas containing natural gas or external gas for controlling the pressure of the liquefied natural gas circulator 300. If possible, as shown in Figure 4, it can be processed by liquefied by moving to the injection type liquefaction unit 200, which has the advantage that there is no need to further have a storage tank for storing natural gas or external gas separately have.
  • the subcooling part 420 of the rear end 400 serves to liquefy natural gas by supercooling the saturated liquefied natural gas and supplying it to the injection type liquefaction unit 200.
  • the subcooling unit 420 supercools the saturated liquefied natural gas using a cooling cycle to which compression and expansion are applied to form a supercooled liquefied natural gas, or saturates liquefied using liquid nitrogen, liquid oxygen, liquid air, or the like. By subcooling the natural gas, the subcooled liquefied natural gas can be formed.
  • the solid removal unit 410 may further include a solid remover configured to remove the solid material between the liquefied natural gas circulator 300 and the subcooling unit 420.
  • it may include a plurality of liquefied natural gas discharge unit 500 for supplying the liquefied natural gas liquefied by the injection type liquefaction unit 200 to the outside.
  • the liquefied natural gas discharge unit 500 may be disposed at the rear end of the liquefied natural gas circulator 300 to supply the saturated liquefied natural gas to the outside of the supply source, and formed at the rear end of the supercooling unit 420 to thereby supercool.
  • the present invention is possible, such as the supply of liquefied natural gas, and thus the present invention is not limited to the position of the liquefied natural gas discharge unit 500 illustrated in the drawing.
  • the injection-type natural gas liquefaction apparatus 1000 to which the liquefied natural gas circulator using the pressurized gas according to the present invention is supplied to decompress natural gas to form a low-pressure expansion natural gas, and low-pressure expansion to the injection-type liquefaction unit 200. Characterized in that it further comprises an expansion valve 100 for supplying natural gas.
  • the expansion valve 100 depressurizes the natural gas to form a low pressure expansion natural gas, and by supplying the low pressure expansion natural gas expanded at the low pressure to the injection liquid liquefaction unit 200 to cool the natural gas to the injection liquid liquefaction Compared to liquefaction in the unit 200 has an advantage that can increase the liquefaction rate.
  • the expansion valve 100 Since the expansion valve 100 receives natural gas and depressurizes the gas, the expansion valve 100 supplies the low pressure expansion natural gas to the jet liquefaction unit 200, but it is recommended to be provided at the front end of the jet liquefaction unit 200, but is not limited thereto.
  • the injection-type natural gas liquefaction apparatus 1000 to which the liquefied natural gas circulator using the pressurized gas according to the present invention shown in FIG. 5 is shown in which two liquefied natural gas circulators 300 are formed in parallel.
  • the upper part of the liquefied natural gas circulator 300 is defined as the first liquefied natural gas circulator 300-1, and the second liquefied natural gas circulator 300-2 will be described.
  • the number of the liquefied natural gas circulator 300 of the injection-type natural gas liquefaction apparatus 1000 to which the liquefied natural gas circulator using the pressurized gas according to the present invention is not limited to the two illustrated in FIG.
  • the 300 may be provided with a plurality of parallel structures.
  • the injection-type natural gas liquefaction apparatus 1000 to which the liquefied natural gas circulator using the pressurized gas according to the present invention is applied is a first liquefied natural gas circulator 300-1 and a second liquefied natural gas circulator ( 300-2), when the first liquefied natural gas circulator 300-1 is in the inflow mode, the second liquefied natural gas circulator 300-2 is in the outflow mode and the continuous liquefied natural gas circulation You can proceed.
  • the injection-type natural gas liquefaction apparatus 1000 to which the liquefied natural gas circulator using the pressurized gas is provided by forming two or more liquefied natural gas circulators 300 in parallel, for example, the first liquefied natural gas circulator ( When the first function is lost due to the failure or damage of 300-1), the second liquefied natural gas circulator 300-2 replaces the function of the first liquefied natural gas circulator 300-1, thereby liquefying the device. There is an advantage that can continue the operation of.
  • the subcooling unit 420 may be formed inside the injection-type liquefaction unit 200. have.
  • the circulating tank 310 of the liquefied natural gas circulator 300 may be formed under the injection type liquefied unit 200 to receive liquefied natural gas according to gravity.
  • the exhaust gas is liquefied back to the injection type liquefaction unit 200.

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Abstract

The present invention relates to an injection type apparatus for liquefying natural gas equipped with a liquefied natural gas circulator using pressurized gas and, more specifically, to an injection type apparatus for liquefying natural gas equipped with a liquefied natural gas circulator using pressurized gas, wherein the injection type apparatus for liquefying natural gas comprises a liquefied natural gas circulator for circulating liquefied natural gas, which is liquefied in an injection type liquefying apparatus, back to an injection type liquefying part by using the pressurized gas to thereby use the circulated liquefied natural gas to liquefy the natural gas, whereby there is no need to have an ultralow temperature circulation pump and a clogging phenomenon caused by solid materials does not occur.

Description

가압가스를 이용한 액화천연가스순환기가 적용된 분사식 천연가스 액화장치Injection type natural gas liquefaction apparatus using liquefied natural gas circulator using pressurized gas
본 발명은 가압가스를 이용한 액화천연가스순환기가 적용된 분사식 천연가스 액화장치에 관한 것으로, 더욱 상세하게는 분사식액화장치에서 액화된 액화천연가스를 가압가스를 이용하여 다시 분사식액화장치로 순환시키는 액화천연가스순환기를 구비함으로써, 순환되는 액화천연가스를 천연가스의 액화에 이용하는 가압가스를 이용한 액화천연가스순환기가 적용된 분사식 천연가스 액화장치에 관한 것이다.The present invention relates to an injection-type natural gas liquefaction apparatus using a liquefied natural gas circulator using pressurized gas, and more particularly, to liquefied natural gas liquefied in the injection-type liquefaction apparatus using pressurized gas back to the injection-type liquefaction apparatus. The present invention relates to an injection type natural gas liquefaction apparatus to which a liquefied natural gas circulator using a pressurized gas that uses liquefied natural gas circulated to liquefy natural gas is provided.
소형 유전 또는 가스전들은 파이프라인이나 전력공급망과 같은 사회간접자본으로부터 멀리 떨어진 경우에는 경제적으로 개발하기 어려운 단점이 있다.Small oil fields or gas fields have the disadvantage of being difficult to develop economically if they are far from social overhead capital such as pipelines and power grids.
특히, 셰일가스 유전의 개발에 있어서, 파이프라인이 구비되지 않은 경우 셰일오일은 회수되는 반면에, 셰일가스는 그대로 태워져 버려지고 있는 실정이며, 이는 자원의 낭비와 더불어 지구온난화를 야기하는 문제점이 있다.In particular, in the development of the shale gas field, when the pipeline is not provided, the shale oil is recovered, but the shale gas is burned as it is, which causes a problem of global warming along with waste of resources. have.
상기와 같은 셰일 유전을 포함하는 소형 가스전에서 천연가스를 회수하기 위해서는 천연가스의 액화작업이 필요하며, 종래에는 터보 기계를 이용하여 냉매를 압축, 팽창하는 방식으로 천연가스를 액화하게 된다.In order to recover natural gas in a small gas field including the shale oil field as described above, liquefaction of natural gas is required, and conventionally, natural gas is liquefied by compressing and expanding a refrigerant using a turbomachine.
그러나 상기의 천연가스 액화방법은 시스템이 복잡하며, 많은 전력을 필요로 하여 전력을 공급해 줄 전력공급망이 필요할 뿐만 아니라, 초기 투자비용이 많은 문제점이 있다.However, the natural gas liquefaction method has a problem that the system is complicated, requires a lot of power, a power supply network to supply power, and has a high initial investment cost.
도 1은 상기의 문제를 해결하기위해 제안된 초저온냉각액체(액화질소, 액화산소, 액화공기)의 증발 잠열을 이용하여 천연가스를 액화하는 초저온액체의 잠열을 이용한 천연가스 액화장치를 나타낸 도면이다.1 is a view showing a natural gas liquefaction apparatus using the latent heat of cryogenic liquid to liquefy natural gas using the latent heat of evaporation of the proposed cryogenic cooling liquid (liquid nitrogen, liquefied oxygen, liquefied air) to solve the above problems. .
상기 초저온액체의 잠열을 이용한 천연가스 액화장치는 천연가스가 고압액화천연가스생산기에서 초저온냉각액체에 의해 액화되며, 고압의 액화천연가스는 과냉각부(고압액화천연가스 과냉각기)에서 추가 냉각되고, 과냉각액화천연가스는 팽창밸브를 통하여 저압액화천연가스를 생산하게 된다.The natural gas liquefaction apparatus using the latent heat of the cryogenic liquid is natural gas is liquefied by the ultra-low temperature cooling liquid in the high pressure liquefied natural gas producer, the high pressure liquefied natural gas is further cooled in the supercooling unit (high pressure liquefied natural gas subcooler), The subcooled liquefied natural gas produces low pressure liquefied natural gas through an expansion valve.
이 때, 고분자량 탄화수소와 이산화탄소는 저온에서 고체가 되므로, 장치의 원활한 동작을 위해서는 고분자량 탄화수소와 이산화탄소를 제거해야 한다.At this time, the high molecular weight hydrocarbon and carbon dioxide becomes a solid at a low temperature, it is necessary to remove the high molecular weight hydrocarbon and carbon dioxide for the smooth operation of the device.
그러나 상기 고분자량 탄화수소는 메탄보다 높은 온도에서 액화되므로, 천연가스의 흐름을 약간 냉각시킨 후, 컨덴세이트(응축물)로 분리해 낼 수 있지만, 이산화탄소의 경우에는 온도 하강만으로는 제거하기 어렵기 때문에, 일반적으로 아민 흡수탑을 포함한 전처리시스템(1)을 장착하여 제거해야 한다.However, since the high molecular weight hydrocarbon is liquefied at a higher temperature than methane, the stream of natural gas can be cooled down slightly and then separated into condensate, but in the case of carbon dioxide, it is difficult to remove only by lowering the temperature. In general, the pretreatment system 1 including the amine absorption tower should be fitted and removed.
상기 전처리 방식은 초기 투자비가 많이 필요하며, 운전이 복잡하여 대형 설비에만 적용되는 문제점이 있다.The pretreatment method requires a lot of initial investment costs, there is a problem in that the operation is complicated and applied only to large facilities.
도 2는 초저온액체의 증발 잠열을 이용하여 천연가스를 액화하는 초저온액체의 잠열을 이용한 분사식 천연가스 액화장치를 나타낸 도면이다.2 is a view showing a spray-type natural gas liquefaction apparatus using the latent heat of cryogenic liquid to liquefy natural gas using the latent heat of evaporation of cryogenic liquid.
상기 초저온액체의 잠열을 이용한 분사식 천연가스 액화장치는 상기와 같이 초저온냉각액체의 증발 잠열을 이용하여 천연가스를 액화하되, 전체적으로 초저온냉각액체는 기화되고 천연가스는 액화되는 방식이다.The spray-type natural gas liquefaction apparatus using the latent heat of the cryogenic liquid is liquefied natural gas using the latent heat of evaporation of the cryogenic cooling liquid as described above, but the cryogenic cooling liquid is vaporized and the natural gas is liquefied as a whole.
이 때, 액화천연가스순환펌프(2)에 의해 순환되는 액화천연가스는 과냉각부(고압액화천연가스 과냉각기)(420)에서 초저온냉각액체에 의해 과냉각되며, 과냉각되어 순환되는 과냉각액화천연가스는 분사식액화부(200)에서 분사되면서 천연가스를 액화시키게 된다.At this time, the liquefied natural gas circulated by the liquefied natural gas circulating pump (2) is supercooled by an ultra low temperature cooling liquid in the subcooling unit (high pressure liquefied natural gas subcooler) 420, and the supercooled liquefied natural gas circulated by subcooling It is injected from the injection liquefaction unit 200 to liquefy the natural gas.
그러나 상기의 분사식 천연가스 액화장치는 액화천연가스순환펌프(2)나 과냉각부(과냉각기)(420)에 고분자량 탄화수소 및 이산화탄소에 의한 고체 물질이 유입될 수 있기 때문에, 고체제거부(고체여과기)(410)를 장착하여 정기적으로 고체를 제거해야 하는 문제점이 있다.However, the above injection type natural gas liquefaction apparatus can be introduced into the liquefied natural gas circulation pump (2) or the subcooling unit (supercooler) 420, the solid material by the high molecular weight hydrocarbon and carbon dioxide, solid removal unit (solid filter) There is a problem in that the solid is periodically removed by mounting the (410).
아울러, 상기의 위험을 최소화하기 위해서 도 1에 도시된 초저온액체의 잠열을 이용한 천연가스 액화장치처럼 이산화탄소를 저농도로 제거해주는 전처리시스템(3)을 장착해야한다.In addition, in order to minimize the above-mentioned risk, it is necessary to equip the pretreatment system 3 which removes carbon dioxide at a low concentration like a natural gas liquefaction apparatus using latent heat of the cryogenic liquid shown in FIG. 1.
본 발명은 상기와 같은 문제점을 해결하기 위하여 안출된 것으로서, 본 발명의 목적은 분사식 천연가스 액화장치에 있어서, 액화천연가스순환펌프를 대신하여 천연가스 또는 외부가스를 포함하는 가압가스를 이용한 압력의 제어에 의해 액화천연가스를 순환시키는 액화천연가스순환기를 구비함으로써, 상기 액화천연가스순환기에 의해 순환된 액화천연가스를 분사하여 천연가스를 액화하는 가압가스를 이용한 액화천연가스순환기가 적용된 분사식 천연가스 액화장치를 제공하는 것이다.The present invention has been made to solve the above problems, an object of the present invention in the injection-type natural gas liquefaction apparatus, in place of the liquefied natural gas circulation pump of pressure using a natural gas or an external gas containing pressure gas A liquefied natural gas circulator for circulating liquefied natural gas by control, and the injection-type natural gas to which the liquefied natural gas circulator using the pressurized gas which liquefies natural gas by injecting the liquefied natural gas circulated by the liquefied natural gas circulator It is to provide a liquefaction apparatus.
본 발명에 따른 가압가스를 이용한 액화천연가스순환기가 적용된 분사식 천연가스 액화장치는 천연가스를 공급받아 액화하여 포화액화천연가스를 형성하는 분사식액화부; 압력의 제어에 의해 상기 분사식액화부로부터 포화액화천연가스를 유입 받거나, 압력의 제어에 의해 포화액화천연가스를 유출하여 상기 분사식액화부로 순환시키는 액화천연가스순환기; 및 상기 액화천연가스순환기 후단에 형성되며, 상기 액화천연가스순환기로부터 포화액화천연가스를 공급받아 과냉각시켜 과냉각액화천연가스를 형성하는 과냉각부를 포함하는 후단부;를 포함하며, 상기 분사식액화부는 상기 과냉각부로부터 과냉각액화천연가스를 공급받아 상기 분사식액화부 내부로 분사하는 분사부를 포함하며, 상기 분사부에 의해 분사되는 과냉각액화천연가스를 저압팽창천연가스의 액화에 이용하는 것을 특징으로 한다.The injection-type natural gas liquefaction apparatus to which the liquefied natural gas circulator using the pressurized gas which concerns on this invention is supplied; A liquefied natural gas circulator for receiving a saturated liquefied natural gas from the jet liquid liquefied part by controlling the pressure or circulating the saturated liquefied natural gas under the control of pressure to circulate the liquefied natural gas; And a rear end formed at a rear end of the liquefied natural gas circulator, the rear end including a supercooling unit receiving supersaturated liquefied natural gas from the liquefied natural gas circulator and forming a supercooled liquefied natural gas. And an injection unit for receiving the supercooled liquefied natural gas from the unit and injecting the liquid into the injection type liquefied unit, wherein the supercooled liquefied natural gas injected by the injection unit is used to liquefy the low pressure expanded natural gas.
특히, 상기 액화천연가스순환기는 외부로부터 유, 출입되는 가압가스에 의해 압력을 제어하는 것을 특징으로 한다.In particular, the liquefied natural gas circulator is characterized in that the pressure is controlled by the pressurized gas flowing in, out from the outside.
또한, 상기 액화천연가스순환기는 포화액화천연가스가 유입 또는 유출되는 순환탱크; 상기 분사식액화부로부터 상기 순환탱크로 유입되는 포화액화천연가스를 제어하는 유입밸브; 상기 순환탱크에서 상기 후단부로 유출되는 포화액화천연가스를 제어하는 유출밸브; 외부로부터 상기 순환탱크로 유입되는 가압가스를 제어하는 가압밸브; 및 상기 순환탱크에서 외부로 유출되는 가압가스를 제어하는 배기밸브;를 포함하는 것을 특징으로 한다.In addition, the liquefied natural gas circulator may include a circulating tank into which a saturated liquefied natural gas flows in or out; An inlet valve for controlling the saturated liquefied natural gas flowing into the circulation tank from the jet liquid liquefaction unit; An outlet valve for controlling the saturated liquefied natural gas flowing out from the circulation tank to the rear end; A pressure valve for controlling the pressurized gas introduced into the circulation tank from the outside; And an exhaust valve controlling the pressurized gas flowing out from the circulation tank to the outside.
또, 상기 후단부는 상기 액화천연가스순환기로부터 순환되는 포화액화천연가스에 함유된 고체를 제거하는 고체제거부를 더 포함하는 것을 특징으로 한다.The rear end may further include a solid removal unit for removing solids contained in the saturated liquefied natural gas circulated from the liquefied natural gas circulator.
아울러, 상기 가압가스를 이용한 액화천연가스 순환기가 적용된 분사식 천연가스 액화장치는 액화천연가스를 외부로 공급하는 액화천연가스배출부를 포함하는 것을 특징으로 한다.In addition, the injection-type natural gas liquefaction apparatus using the liquefied natural gas circulator using the pressurized gas is characterized in that it comprises a liquefied natural gas discharge unit for supplying the liquefied natural gas to the outside.
또한, 상기 가압가스를 이용한 액화천연가스순환기가 적용된 분사식 천연가스 액화장치는 천연가스를 공급받아 감압하여 저압팽창천연가스를 형성하며, 상기 분사식액화부로 저압팽창천연가스를 공급하는 팽창밸브를 더 포함하는 것을 특징으로 한다.In addition, the injection-type natural gas liquefaction apparatus using the liquefied natural gas circulator using the pressurized gas to form a low-pressure expansion natural gas by reducing the pressure received natural gas, and further includes an expansion valve for supplying a low-pressure expansion natural gas to the injection type liquefaction unit Characterized in that.
또, 상기 가압가스를 이용한 액화천연가스순환기가 적용된 분사식 천연가스 액화장치는 상기 액화천연가스순환기가 복수의 병렬구조로 형성되는 것을 특징으로 한다.In addition, the injection type natural gas liquefaction apparatus using the liquefied natural gas circulator using the pressurized gas is characterized in that the liquefied natural gas circulator is formed in a plurality of parallel structure.
아울러, 상기 가압가스를 이용한 액화천연가스 순환기가 적용된 분사식 천연가스 액화장치는 상기 과냉각부가 상기 분사식액화부 내부에 형성되는 것을 특징으로 한다.In addition, the injection type natural gas liquefaction apparatus to which the liquefied natural gas circulator using the pressurized gas is characterized in that the supercooling portion is formed in the injection type liquefaction unit.
본 발명에 따른 가압가스를 이용한 액화천연가스순환기가 적용된 분사식 천연가스 액화장치는 천연가스를 액화하는데 있어서, 액화천연가스를 순환시키는 액화천연가스순환펌프(초저온 펌프)를 구비할 필요가 없는 장점이 있다.The injection-type natural gas liquefaction apparatus to which the liquefied natural gas circulator using the pressurized gas according to the present invention does not need to have a liquefied natural gas circulating pump (cryogenic pump) for circulating liquefied natural gas in liquefying natural gas. have.
특히, 본 발명에 따른 가압가스를 이용한 액화천연가스순환기가 적용된 분사식 천연가스 액화장치는 이산화탄소 고체 등을 포함하는 고체물질에 의한 막힘 현상이 없는 장점이 있다.In particular, the injection-type natural gas liquefaction apparatus to which the liquefied natural gas circulator using the pressurized gas according to the present invention has an advantage that there is no clogging due to a solid material including carbon dioxide solid.
또한, 본 발명에 따른 가압가스를 이용한 액화천연가스순환기가 적용된 분사식 천연가스 액화장치는 액화천연가스순환기의 압력을 제어하는 천연가스 또는 액화가 가능한 외부가스를 사용하는 경우, 사용 후 분사식액화부로 이동시켜 액화함으로써, 천연가스 또는 외부가스를 따로 저장할 탱크를 더 구비해야할 필요가 없는 장점이 있다.In addition, the injection-type natural gas liquefaction apparatus using the liquefied natural gas circulator using the pressurized gas is moved to the injection-type liquefaction unit after use, when using natural gas or liquefied external gas to control the pressure of the liquefied natural gas circulator By liquefying, there is no need to further provide a tank for storing natural gas or external gas separately.
또, 본 발명에 따른 가압가스를 이용한 액화천연가스순환기가 적용된 분사식 천연가스 액화장치는 상기 액화천연가스순환기를 2개 이상 병렬로 형성하여 운전하는 경우, 연속적인 운전이 가능한 장점이 있다.In addition, the injection-type natural gas liquefaction apparatus using the liquefied natural gas circulator using the pressurized gas according to the present invention has the advantage that continuous operation is possible when the liquefied natural gas circulator is formed and operated in parallel.
아울러, 본 발명에 따른 가압가스를 이용한 액화천연가스순환기가 적용된 분사식 천연가스 액화장치는 액화천연가스를 과냉각하기 위한 과냉각부를 상기 분사식액화부 내부에 구비함으로써, 천연가스 액화장치의 구성이 간단해지는 장점이 있다.In addition, the injection-type natural gas liquefaction apparatus using the liquefied natural gas circulator using the pressurized gas has an advantage that the configuration of the natural gas liquefaction apparatus is simplified by providing a subcooling part inside the injection-type liquefaction unit for supercooling the liquefied natural gas. There is this.
도 1은 초저온액체의 잠열을 이용한 천연가스 액화장치를 나타낸 도면.1 is a view showing a natural gas liquefaction apparatus using the latent heat of the cryogenic liquid.
도 2는 초저온액체의 잠열을 이용한 분사식 천연가스 액화장치를 나타낸 도면.2 is a view showing a spray-type natural gas liquefaction apparatus using the latent heat of the cryogenic liquid.
도 3은 본 발명에 따른 가압가스를 이용한 액화천연가스순환기가 적용된 분사식 천연가스 액화장치를 나타낸 도면.3 is a view showing a spray-type natural gas liquefaction apparatus applied with a liquefied natural gas circulator using a pressurized gas according to the present invention.
도 4는 본 발명에 따른 가압가스를 이용한 액화천연가스순환기가 적용된 분사식 천연가스 액화장치를 나타낸 또 다른 도면.Figure 4 is another view showing the injection-type natural gas liquefaction apparatus applied to the liquefied natural gas circulator using a pressurized gas according to the present invention.
도 5는 본 발명에 따른 가압가스를 이용한 액화천연가스순환기가 적용된 분사식 천연가스 액화장치의 제1실시예를 나타낸 도면.5 is a view showing a first embodiment of the injection-type natural gas liquefaction apparatus to which the liquefied natural gas circulator using the pressurized gas according to the present invention is applied.
도 6은 본 발명에 따른 가압가스를 이용한 액화천연가스순환기가 적용된 분사식 천연가스 액화장치의 제2실시예를 나타낸 도면.6 is a view showing a second embodiment of the injection-type natural gas liquefaction apparatus to which the liquefied natural gas circulator using the pressurized gas according to the present invention is applied.
이하, 상기한 바와 같은 특징을 가지는 본 발명에 따른 가압가스를 이용한 액화천연가스순환기가 적용된 분사식 천연가스 액화장치를 첨부된 도면을 참조로 상세히 설명한다.Hereinafter, a spray-type natural gas liquefaction apparatus to which a liquefied natural gas circulator using a pressurized gas according to the present invention having the characteristics as described above is described in detail with reference to the accompanying drawings.
본 발명에 따른 가압가스를 이용한 액화천연가스순환기가 적용된 분사식 천연가스 액화장치(1000)는 분사식액화부(200)에서 과냉각액화천연가스를 분사하여 천연가스를 액화하는 장치에 있어서, 액화하기 위한 천연가스 또는 외부가스를 이용하여 압력을 제어하되, 제어하는 압력에 의해 액화천연가스(과냉각기를 지나 과냉각된 과냉각액화천연가스)를 다시 분사식액화부(200)로 순환시키는 액화천연가스순환기(300)를 구비함으로써, 상기 액화천연가스순환기(300)에 의해 순환된 액화천연가스를 상기 분사식액화부(200)에 구비되는 분사부(210)를 통해 분사하여 천연가스를 액화하는 장치이다.The injection-type natural gas liquefaction apparatus 1000 to which the liquefied natural gas circulator using the pressurized gas according to the present invention is injected into the liquefied natural gas by injecting the supercooled liquefied natural gas from the injection-type liquefaction unit 200, to liquefy natural gas. The liquefied natural gas circulator 300 which controls the pressure using a gas or an external gas, and circulates the liquefied natural gas (subcooled supercooled liquefied natural gas past the subcooler) to the injection type liquefied unit 200 by the controlling pressure. In this case, the liquefied natural gas circulated by the liquefied natural gas circulator 300 is injected through the injection unit 210 provided in the injection type liquefaction unit 200 to liquefy natural gas.
좀 더 상세히 설명하자면, 도 3 내지 도 4에 도시된 바와 같이, 본 발명에 따른 가압가스를 이용한 액화천연가스순환기가 적용된 분사식 천연가스 액화장치(1000)는 천연가스를 공급받아 액화하여 포화액화천연가스를 형성하는 분사식액화부(200), 압력의 제어에 의해 상기 분사식액화부(200)로부터 포화액화천연가스를 유입받고, 유입받은 포화액화천연가스를 유출하여 상기 분사식액화부(200)로 순환시키는 액화천연가스순환기(300) 및 상기 액화천연가스순환기(300) 후단에 형성되며 상기 액화천연가스순환기(300)로부터 포화액화천연가스를 공급받아 과냉각시켜 과냉각액화천연가스를 형성하는 과냉각부(420)를 포함하는 후단부(400)를 포함한다.In more detail, as shown in Figures 3 to 4, the injection-type natural gas liquefaction apparatus 1000 to which the liquefied natural gas circulator using the pressurized gas according to the present invention is supplied with liquefied natural gas to saturate liquefied natural The liquefied liquefied gas unit 200 to form a gas, the saturated liquefied natural gas is introduced from the liquefied liquefied gas unit 200 under the control of the pressure, and the saturated liquefied natural gas flows out and circulated to the sprayed liquefied liquid unit 200. The supercooling unit 420 is formed at the rear end of the liquefied natural gas circulator 300 and the liquefied natural gas circulator 300, and is supercooled by receiving a saturated liquefied natural gas from the liquefied natural gas circulator 300 to form a supercooled liquefied natural gas. It includes a rear end 400, including.
이 때, 상기 분사식액화부(200)는 상기 과냉각부(420)로부터 과냉각액화천연가스를 공급받아 상부면에 형성되는 분사부(210)를 통해 분사하여 저압팽창천연가스를 냉각함으로써 포화액화천연가스를 형성하게 된다.At this time, the injection type liquefaction unit 200 receives the subcooled liquefied natural gas from the subcooling unit 420 and injects through the injection unit 210 formed on the upper surface to cool the low-pressure expansion natural gas to saturate liquefied natural gas Will form.
즉, 본 발명에 따른 가압가스를 이용한 액화천연가스순환기가 적용된 분사식 천연가스 액화장치(1000)는 도 2에 도시된 종래의 분사식 천연가스 액화장치에서 액화천연가스 또는 과냉각액화천연가스를 순환시키기 위한 초저온의액화천연가스순환펌프(2)를 대신하여 상기 액화천연가스순환기(300)를 구비하고, 상기 액화천연가스순환기(300)를 이용하여 과냉각액화천연가스를 분사식액화부(200)로 순환시키는 것을 특징으로 한다.That is, the injection-type natural gas liquefaction apparatus 1000 to which the liquefied natural gas circulator using the pressurized gas according to the present invention is applied to circulate liquefied natural gas or supercooled liquefied natural gas in the conventional injection-type natural gas liquefaction apparatus shown in FIG. 2. Instead of the cryogenic liquefied natural gas circulating pump (2) is provided with the liquefied natural gas circulator 300, using the liquefied natural gas circulator 300 to circulate the supercooled liquefied natural gas to the injection type liquefaction unit 200 It is characterized by.
다시 말해, 본 발명에 따른 가압가스를 이용한 액화천연가스순환기가 적용된 분사식 천연가스 액화장치(1000)의 상기 액화천연가스순환기(300)는 포화액화천연가스를 다시 분사식액화부(200)로 순환시키는 역할을 하되, 천연가스를 냉각하여 포화액화천연가스를 형성하기 위해 순환되는 유로관 상에 과냉각부(420)를 더 형성함으로써, 과냉각부(420)에 의해 과냉각된 과냉각액화천연가스를 분사식액화부(200)로 공급함으로써, 포화액화천연가스를 생성한다.In other words, the liquefied natural gas circulator 300 of the injection-type natural gas liquefaction apparatus 1000 to which the liquefied natural gas circulator using the pressurized gas according to the present invention circulates the saturated liquefied natural gas back to the injection-type liquefaction unit 200. The subcooled liquefied natural gas supercooled by the subcooled part 420 by further forming a subcooled part 420 on the flow path pipe circulated to cool the natural gas to form a saturated liquefied natural gas. By supplying to 200, saturated liquefied natural gas is produced.
이 때, 상기 액화천연가스순환기(300)의 압력의 제어는 외부로부터 유, 출입되는 가압가스에 의해 압력을 제어하는 것을 특징으로 한다.At this time, the control of the pressure of the liquefied natural gas circulator 300 is characterized in that for controlling the pressure by the pressurized gas flowing in and out from the outside.
상기 가압가스로는 액화되기 위해 공급되는 천연가스 또는 액화가 용이한 외부가스를 포함하며, 상기 외부가스로는 전처리된 천연가스나 비활성 질소가스 등이 사용될 수 있으며, 이에 한정하지 않고 압력의 제어를 위한 다양한 외부가스의 실시예가 가능함은 물론이다.The pressurized gas may include a natural gas supplied to be liquefied or an external gas that is easily liquefied. The external gas may be a pretreated natural gas or an inert nitrogen gas, and the like. Of course, the embodiment of the external gas is possible.
상기 액화천연가스순환기(300)에 대해 좀 더 상세히 설명하자면, 상기 액화천연가스순환기(300)는 포화액화천연가스가 유입 또는 유출되는 순환탱크(310)를 포함한다.In more detail with respect to the liquefied natural gas circulator 300, the liquefied natural gas circulator 300 includes a circulating tank 310, the saturated liquefied natural gas flows in or out.
이 때, 상기 액화천연가스순환기(300)는 상기 분사식액화부(200)로부터 상기 순환탱크(310)로 유입되는 포화액화천연가스를 제어하는 유입밸브(320)와 상기 순환탱크(310)에서 상기 후단부(400)로 유출되는 포화액화천연가스를 제어하는 유출밸브(330)를 포함한다.At this time, the liquefied natural gas circulator 300 is the inlet valve 320 and the circulating tank 310 for controlling the saturated liquefied natural gas flowing into the circulation tank 310 from the injection type liquefaction unit 200 It includes an outlet valve 330 for controlling the saturated liquefied natural gas flowing out to the rear end 400.
아울러, 상기 순환탱크(310) 내의 포화액화천연가스의 유, 출입을 위한 압력 제어를 위해 외부로부터 상기 순환탱크(310)로 유입되는 가압가스를 제어하는 가압밸브(340)와 상기 순환탱크(310)에서 외부로 유출되는 가압가스를 제어하는 배기밸브(350)를 포함한다.In addition, the pressure valve 340 and the circulation tank 310 for controlling the pressurized gas flowing into the circulation tank 310 from the outside for pressure control for the oil, the entrance and exit of the saturated liquefied natural gas in the circulation tank 310 It includes an exhaust valve 350 for controlling the pressurized gas flowing out from the).
즉, 상기 액화천연가스순환기(300)는 밸브의 개폐여부 및 가압가스에 의한 상기 순환탱크(310)의 압력제어에 의해 순환탱크(310)로 포화액화천연가스를 유입받거나 유출시켜 순환시키게 된다.That is, the liquefied natural gas circulator 300 circulates the saturated liquefied natural gas into or circulates into the circulating tank 310 by controlling the pressure of the circulating tank 310 by opening or closing the valve and pressurized gas.
상기 가압가스의 압력제어에 의한 액화천연가스순환기(300)의 작동을 좀 더 상세히 설명하자면, 상기 액화천연가스순환기(300)는 상기 분사식액화부(200)로부터 포화액화천연가스를 순환탱크(310)로 유입시키는 유입모드와 상기 순환탱크(310) 내의 포화액화천연가스를 다시 분사식액화부(200)로 순환시키기 위해 유출시키는 유출모드로 나눌 수 있다.To explain the operation of the liquefied natural gas circulator 300 by the pressure control of the pressurized gas in more detail, the liquefied natural gas circulator 300 circulates the saturated liquefied natural gas from the spray type liquefied tank 200 ) Into an inflow mode and an outflow mode for outflow to saturate the saturated liquefied natural gas in the circulation tank 310 to the injection type liquefaction unit 200 again.
상기 액화천연가스순환기(300)의 유입모드 시에는 상기 순환탱크(310)의 압력을 낮추기 위해, 가압가스가 공급되는 가압밸브(340)는 폐쇄시키되, 순환탱크(310) 내의 가압가스를 유출시키기 위한 제어를 수행하는 배기밸브(350)는 개방된다. In the inflow mode of the liquefied natural gas circulator 300, in order to lower the pressure in the circulation tank 310, the pressure valve 340 to which the pressurized gas is supplied is closed, but the pressurized gas in the circulation tank 310 is discharged. The exhaust valve 350 for performing the control is opened.
아울러, 상기 유출밸브(330)는 폐쇄되고 상기 유입밸브(320)는 개방됨으로써, 상기 순환탱크(310)는 상기 분사식액화부(200)로부터 포화액화천연가스를 유입받는다.In addition, the outlet valve 330 is closed and the inlet valve 320 is opened, so that the circulation tank 310 receives the saturated liquefied natural gas from the injection type liquefaction unit 200.
즉, 배기밸브(350)의 개방에 의해 상기 순환탱크(310) 내부의 가압가스가 빠져나가 압력이 낮아지며, 압력차이에 의해 분사식액화부(200)로부터 포화액화천연가스가 상기 순환탱크(310)로 유입된다.That is, the pressure of the pressurized gas in the circulation tank 310 is released by the opening of the exhaust valve 350 and the pressure is lowered. The saturated liquefied natural gas is injected from the injection type liquefaction unit 200 by the pressure difference. Flows into.
이 때, 상기 배기밸브(350)는 상기 분사식액화부(200)로부터 유입되는 포화액화천연가스에 의해 상기 순환탱크(310) 내부의 수위가 원하는 일정 수위로 상승하여 도달하게 되면 폐쇄하여 압력평형을 이루도록 하는 것이 권장되나 한정하지는 않는다.At this time, the exhaust valve 350 is closed by the saturated liquid liquefied natural gas flowing from the injection type liquefaction unit 200 when the level inside the circulation tank 310 rises to a desired level and reaches a desired pressure balance. It is recommended but not limited to.
상기 유입모드와는 반대로 유출모드 시에는 상기 순환탱크(310) 내부의 포화액화천연가스를 후단부(400)로 유출시키기 위해 상기 배기밸브(350)는 폐쇄하는 반면, 상기 가압밸브(340)는 개방하여 상기 순환탱크(310)로 가압가스를 유입시킴으로써, 상기 순환탱크(310)의 압력을 높인다.In contrast to the inflow mode, in the outflow mode, the exhaust valve 350 is closed to discharge the saturated liquefied natural gas in the circulation tank 310 to the rear end 400, while the pressure valve 340 is closed. By opening the pressurized gas into the circulation tank 310 to increase the pressure of the circulation tank 310.
또한, 상기 유입밸브(320)는 폐쇄하고 상기 유출밸브(330)는 개방하여 유출하게 된다.In addition, the inlet valve 320 is closed and the outlet valve 330 is opened to flow out.
즉, 상기 가압밸브(340)를 통해 유입되는 가압가스에 의해 상기 순환탱크(310) 내부는 압력이 높아지며, 압력차이에 의해 상기 순환탱크(310) 내부에 저장된 포화액화천연가스는 후단으로 유출된다.That is, the pressure inside the circulation tank 310 is increased by the pressurized gas introduced through the pressure valve 340, and the saturated liquefied natural gas stored in the circulation tank 310 is discharged to the rear end by the pressure difference. .
아울러, 본 발명에 따른 가압가스를 이용한 액화천연가스순환기가 적용된 분사식 천연가스액화장치(1000)는 액화천연가스순환기(300)의 압력을 제어하는 천연가스 또는 외부가스를 포함하는 가압가스가 액화가 가능한 경우, 도 4에 도시된 바와 같이, 분사식액화부(200)로 이동시켜 액화함으로써 처리할 수 있으며, 이는 천연가스 또는 외부가스를 따로 저장하기 위한 저장탱크를 더 구비해야 할 필요가 없는 장점이 있다.In addition, the injection-type natural gas liquefaction apparatus 1000 to which the liquefied natural gas circulator using the pressurized gas according to the present invention has a pressurized gas containing natural gas or external gas for controlling the pressure of the liquefied natural gas circulator 300. If possible, as shown in Figure 4, it can be processed by liquefied by moving to the injection type liquefaction unit 200, which has the advantage that there is no need to further have a storage tank for storing natural gas or external gas separately have.
상기 후단부(400)의 과냉각부(420)는 상기 포화액화천연가스를 과냉각시켜 상기 분사식액화부(200)로 공급함으로써, 천연가스를 액화시키는 역할을 한다.The subcooling part 420 of the rear end 400 serves to liquefy natural gas by supercooling the saturated liquefied natural gas and supplying it to the injection type liquefaction unit 200.
이 때, 상기 과냉각부(420)는 압축 및 팽창이 적용된 냉각사이클을 이용하여 상기 포화액화천연가스를 과냉각시켜 과냉각액화천연가스를 형성하거나, 액체질소, 액체산소, 액체공기 등을 이용하여 포화액화천연가스를 과냉각시킴으로써, 과냉각액화천연가스를 형성할 수 있다.At this time, the subcooling unit 420 supercools the saturated liquefied natural gas using a cooling cycle to which compression and expansion are applied to form a supercooled liquefied natural gas, or saturates liquefied using liquid nitrogen, liquid oxygen, liquid air, or the like. By subcooling the natural gas, the subcooled liquefied natural gas can be formed.
상기 과냉각부(420)의 액화천연가스의 과냉각 방법은 종래기술에 적용되어 있으므로 자세한 설명은 생략하기로 한다.Since the subcooling method of the liquefied natural gas of the subcooling unit 420 is applied to the prior art, a detailed description thereof will be omitted.
도 4에 도시된 바와 같이, 본 발명에 따른 가압가스를 이용한 액화천연가스순환기가 적용된 분사식 천연가스 액화장치(1000)의 상기 후단부(400)는 상기 과냉각부(420)로 고체물질이 유입되는 것을 방지하고자, 상기 액화처연가스순환기(300)와 상기 과냉각부(420) 사이에 고체물질을 제거하는 고체제거기가 구비되는 고체제거부(410)를 더 포함할 수 있다.As shown in FIG. 4, the rear end 400 of the spray-type natural gas liquefaction apparatus 1000 to which the liquefied natural gas circulator using the pressurized gas according to the present invention is introduced into the supercooling unit 420. In order to prevent that, the solid removal unit 410 may further include a solid remover configured to remove the solid material between the liquefied natural gas circulator 300 and the subcooling unit 420.
아울러, 상기 분사식액화부(200)에서 액화된 액화천연가스를 외부로 공급하는 액화천연가스배출부(500)를 다수 포함할 수 있다.In addition, it may include a plurality of liquefied natural gas discharge unit 500 for supplying the liquefied natural gas liquefied by the injection type liquefaction unit 200 to the outside.
즉, 상기 액화천연가스배출부(500)는 액화천연가스순환기(300) 후단에 배치되어 포화액화천연가스를 공급처인 외부로 공급할 수 있을 뿐만 아니라, 상기 과냉각부(420) 후단에 형성됨으로써, 과냉각액화천연가스를 공급할 수 있는 등 다양한 위치 실시예가 가능하므로 도면에 도시된 액화천연가스배출부(500)의 위치에 한정하지 않는다.That is, the liquefied natural gas discharge unit 500 may be disposed at the rear end of the liquefied natural gas circulator 300 to supply the saturated liquefied natural gas to the outside of the supply source, and formed at the rear end of the supercooling unit 420 to thereby supercool. Various embodiments of the present invention are possible, such as the supply of liquefied natural gas, and thus the present invention is not limited to the position of the liquefied natural gas discharge unit 500 illustrated in the drawing.
또한, 본 발명에 따른 가압가스를 이용한 액화천연가스순환기가 적용된 분사식 천연가스 액화장치(1000)는 천연가스를 공급받아 감압하여 저압팽창천연가스를 형성하며, 상기 분사식액화부(200)로 저압팽창천연가스를 공급하는 팽창밸브(100)를 더 포함하는 것을 특징으로 한다.In addition, the injection-type natural gas liquefaction apparatus 1000 to which the liquefied natural gas circulator using the pressurized gas according to the present invention is supplied to decompress natural gas to form a low-pressure expansion natural gas, and low-pressure expansion to the injection-type liquefaction unit 200. Characterized in that it further comprises an expansion valve 100 for supplying natural gas.
상기 팽창밸브(100)는 천연가스를 감압하여 저압팽창천연가스를 형성하고, 그 저압으로 팽창된 저압팽창천연가스를 상기 분사식액화부(200)로 공급하여 냉각하게 함으로써, 천연가스를 상기 분사식액화부(200)에서 액화하는 것에 비해 액화율을 높일 수 있는 장점이 있다.The expansion valve 100 depressurizes the natural gas to form a low pressure expansion natural gas, and by supplying the low pressure expansion natural gas expanded at the low pressure to the injection liquid liquefaction unit 200 to cool the natural gas to the injection liquid liquefaction Compared to liquefaction in the unit 200 has an advantage that can increase the liquefaction rate.
상기 팽창밸브(100)는 천연가스를 공급받아 감압하여 저압팽창천연가스를 상기 분사식액화부(200)로 공급하므로, 상기 분사식액화부(200) 전단에 구비되는 것이 권장되나, 한정하지는 않는다.Since the expansion valve 100 receives natural gas and depressurizes the gas, the expansion valve 100 supplies the low pressure expansion natural gas to the jet liquefaction unit 200, but it is recommended to be provided at the front end of the jet liquefaction unit 200, but is not limited thereto.
<본 발명에 따른 가압가스를 이용한 액화천연가스순환기가 적용된 분사식 천연가스 액화장치(1000)의 제1실시예><First embodiment of the injection type natural gas liquefaction apparatus 1000 to which the liquefied natural gas circulator using the pressurized gas according to the present invention is applied>
본 발명에 따른 가압가스를 이용한 액화천연가스순환기가 적용된 분사식 천연가스 액화장치(1000)는 액화천연가스순환기(300)가 유입모드일 때에는 유출밸브가 폐쇄되므로, 포화액화천연가스의 연속적인 순환이 이루어지기 어렵다.The injection-type natural gas liquefaction apparatus 1000 to which the liquefied natural gas circulator using the pressurized gas according to the present invention is closed when the liquefied natural gas circulator 300 is in the inflow mode, the continuous circulation of saturated liquefied natural gas is It is difficult to make.
그러므로 본 발명에 따른 가압가스를 이용한 액화천연가스순환기가 적용된 분사식 천연가스 액화장치(1000)는 도 5에 도시된 바와 같이, 상기 액화천연가스순환기(300)를 2개 이상 병렬구조로 형성될 수 있다.Therefore, the injection-type natural gas liquefaction apparatus 1000 to which the liquefied natural gas circulator using the pressurized gas according to the present invention is shown in FIG. 5, the liquefied natural gas circulator 300 may be formed in two or more parallel structures. have.
도 5에 도시된 본 발명에 따른 가압가스를 이용한 액화천연가스순환기가 적용된 분사식 천연가스 액화장치(1000)는 2개의 액화천연가스순환기(300)가 병렬로 형성된 것을 나타낸 도면으로, 자세한 설명을 위해 상부의 액화천연가스순환기(300)를 제1액화천연가스순환기(300-1)로 하부의 액화천연가스순환기를 제2액화천연가스 순환기(300-2)로 정의하여 설명하기로 한다.The injection-type natural gas liquefaction apparatus 1000 to which the liquefied natural gas circulator using the pressurized gas according to the present invention shown in FIG. 5 is shown in which two liquefied natural gas circulators 300 are formed in parallel. The upper part of the liquefied natural gas circulator 300 is defined as the first liquefied natural gas circulator 300-1, and the second liquefied natural gas circulator 300-2 will be described.
물론, 본 발명에 따른 가압가스를 이용한 액화천연가스순환기가 적용된 분사식 천연가스 액화장치(1000)의 액화천연가스순환기(300)의 개수는 도 5에 도시된 2개로 한정하지 않고 상기 액화천연가스순환기(300)가 다양한 병렬구조로 다수 구비되어 형성될 수 있음은 물론이다.Of course, the number of the liquefied natural gas circulator 300 of the injection-type natural gas liquefaction apparatus 1000 to which the liquefied natural gas circulator using the pressurized gas according to the present invention is not limited to the two illustrated in FIG. Of course, the 300 may be provided with a plurality of parallel structures.
도 5에 도시된 바와 같이, 본 발명에 따른 가압가스를 이용한 액화천연가스순환기가 적용된 분사식 천연가스 액화장치(1000)는 제1액화천연가스순환기(300-1) 및 제2액화천연가스순환기(300-2)를 구비함으로써, 상기 제1액화천연가스순환기(300-1)가 유입모드 일 때, 제2액화천연가스순환기(300-2)는 유출모드가 되어 연속적인 포화액화천연가스의 순환을 진행할 수 있다.As illustrated in FIG. 5, the injection-type natural gas liquefaction apparatus 1000 to which the liquefied natural gas circulator using the pressurized gas according to the present invention is applied is a first liquefied natural gas circulator 300-1 and a second liquefied natural gas circulator ( 300-2), when the first liquefied natural gas circulator 300-1 is in the inflow mode, the second liquefied natural gas circulator 300-2 is in the outflow mode and the continuous liquefied natural gas circulation You can proceed.
또한, 가압가스를 이용한 액화천연가스순환기가 적용된 분사식 천연가스 액화장치(1000)는 2개 이상의 액화천연가스순환기(300)를 병렬로 형성하여 구비함으로써, 예를 들어 상기 제1액화천연가스순환기(300-1)의 고장 또는 파손으로 인해 제 기능을 상실할 경우, 상기 제2액화천연가스순환기(300-2)가 상기 제1액화천연가스순환기(300-1)의 기능을 대신함으로써, 액화장치의 운전을 연속적으로 진행시킬 수 있는 장점이 있다.In addition, the injection-type natural gas liquefaction apparatus 1000 to which the liquefied natural gas circulator using the pressurized gas is provided by forming two or more liquefied natural gas circulators 300 in parallel, for example, the first liquefied natural gas circulator ( When the first function is lost due to the failure or damage of 300-1), the second liquefied natural gas circulator 300-2 replaces the function of the first liquefied natural gas circulator 300-1, thereby liquefying the device. There is an advantage that can continue the operation of.
<본 발명에 따른 가압가스를 이용한 액화천연가스순환기가 적용된 분사식 천연가스 액화장치(1000)의 제2실시예><Second embodiment of the injection type natural gas liquefaction apparatus 1000 to which the liquefied natural gas circulator using the pressurized gas according to the present invention is applied>
본 발명에 따른 가압가스를 이용한 액화천연가스순환기가 적용된 분사식 천연가스 액화장치(1000)는 도 6에 도시된 바와 같이, 상기 과냉각부(420)가 상기 분사식액화부(200) 내부에 형성될 수 있다.In the injection-type natural gas liquefaction apparatus 1000 to which the liquefied natural gas circulator using the pressurized gas according to the present invention is shown in FIG. 6, the subcooling unit 420 may be formed inside the injection-type liquefaction unit 200. have.
이는 과냉각부(420)의 열교환기 및 압력용기의 개수를 줄이기 위한 것으로, 이는 초저온냉매가 분사식액화부(200) 내부에 설치된 과냉각부(420)로 유입되어 분사되는 액화천연가스를 냉각시킬 수 있다This is to reduce the number of heat exchangers and pressure vessels of the subcooling unit 420, which may cool the liquefied natural gas that is injected into the supercooling unit 420 installed inside the injection type liquefaction unit 200.
이 때, 액화천연가스순환기(300)의 순환탱크(310)는 상기 분사식액화부(200) 하부에 형성되어 중력에 따라 액화천연가스를 공급받을 수 있다.At this time, the circulating tank 310 of the liquefied natural gas circulator 300 may be formed under the injection type liquefied unit 200 to receive liquefied natural gas according to gravity.
아울러, 배출기체는 다시 분사식액화부(200)로 돌아가 액화된다.In addition, the exhaust gas is liquefied back to the injection type liquefaction unit 200.
[부호의 설명][Description of the code]
1000 : 가압가스를 이용한 액화천연가스순환기가 적용된 분사식 천연가스 액화장치1000: injection type natural gas liquefaction apparatus using liquefied natural gas circulator using pressurized gas
100 : 팽창밸브100: expansion valve
200 : 분사식액화부200: jet liquid liquefaction unit
210 : 분사부210: injection unit
300 : 액화천연가스순환기300: liquefied natural gas circulator
310 : 순환탱크310: circulation tank
320 : 유입밸브320: inlet valve
330 : 유출밸브330: outlet valve
340 : 가압밸브340: pressure valve
350 : 배기밸브350: exhaust valve
300-1 : 제1액화천연가스순환기300-1: first liquefied natural gas circulator
300-2 : 제2액화천연가스순환기300-2: second liquefied natural gas circulator
310-1 : 제1순환탱크310-1: 1st circulation tank
310-2 : 제2순환탱크310-2: second circulation tank
400 : 후단부400: rear end
410 : 고체제거부410: solid removal
420 : 과냉각부420: supercooling unit
500 : 액화천연가스배출부500: liquefied natural gas discharge unit

Claims (8)

  1. 천연가스를 공급받아 액화하여 포화액화천연가스를 형성하는 분사식액화부(200);An injection type liquefaction unit 200 configured to receive natural gas and liquefy to form a saturated liquefied natural gas;
    압력의 제어에 의해 상기 분사식액화부(200)로부터 포화액화천연가스를 유입받거나, 압력의 제어에 의해 포화액화천연가스를 유출하여 상기 분사식액화부(200)로 순환시키는 액화천연가스순환기(300); 및The liquefied natural gas circulator 300 which receives the saturated liquefied natural gas from the injection type liquefaction unit 200 by the control of the pressure or circulates the saturated liquefied natural gas by the control of the pressure to the injection type liquefaction unit 200. ; And
    상기 액화천연가스순환기(300) 후단에 형성되며, 상기 액화천연가스순환기(300)로부터 포화액화천연가스를 공급받아 과냉각시켜 과냉각액화천연가스를 형성하는 과냉각부(420)를 포함하는 후단부(400);를 포함하며,The rear end 400 is formed at the rear end of the liquefied natural gas circulator 300, and includes a supercooling unit 420 that receives a saturated liquefied natural gas from the liquefied natural gas circulator 300 to overcool to form a supercooled liquefied natural gas. );
    상기 분사식액화부(200)는The injection liquefaction unit 200
    상기 과냉각부(420)로부터 과냉각액화천연가스를 공급받아 상기 분사식액화부(200) 내부로 분사하는 분사부(210)를 포함하며, 상기 분사부(210)에 의해 분사되는 과냉각액화천연가스를 저압팽창천연가스의 액화에 이용하는 것을 특징으로 하는 가압가스를 이용한 액화천연가스순환기가 적용된 분사식 천연가스 액화장치.The subcooling liquefied natural gas is supplied from the subcooling unit 420, and includes an injection unit 210 for injecting into the injection type liquefaction unit 200, the low-cooling liquefied natural gas injected by the injection unit 210 A spray-type natural gas liquefaction apparatus to which a liquefied natural gas circulator using pressurized gas is used for liquefaction of expanded natural gas.
  2. 제 1항에 있어서,The method of claim 1,
    상기 액화천연가스순환기(300)는The liquefied natural gas circulator 300
    외부로부터 유, 출입되는 가압가스에 의해 압력을 제어하는 것을 특징으로 하는 가압가스를 이용한 액화천연가스순환기가 적용된 분사식 천연가스 액화장치.Injection natural gas liquefaction apparatus using a liquefied natural gas circulator using a pressurized gas, characterized in that the pressure is controlled by the pressurized gas from the outside.
  3. 제 2항에 있어서,The method of claim 2,
    상기 액화천연가스순환기(300)는The liquefied natural gas circulator 300
    포화액화천연가스가 유입 또는 유출되는 순환탱크(310);A circulation tank 310 into which the saturated liquefied natural gas flows in or out;
    상기 분사식액화부(200)로부터 상기 순환탱크(310)로 유입되는 포화액화천연가스를 제어하는 유입밸브(320);An inlet valve 320 for controlling the saturated liquefied natural gas flowing into the circulation tank 310 from the injection type liquefaction unit 200;
    상기 순환탱크(310)에서 상기 후단부(400)로 유출되는 포화액화천연가스를 제어하는 유출밸브(330);An outlet valve 330 for controlling the saturated liquefied natural gas flowing out from the circulation tank 310 to the rear end 400;
    외부로부터 상기 순환탱크(310)로 유입되는가압가스를 제어하는 가압밸브(340); 및A pressure valve 340 for controlling the pressurized gas introduced into the circulation tank 310 from the outside; And
    상기 순환탱크(310)에서 외부로 유출되는 가압가스를 제어하는 배기밸브(350);를 포함하는 것을 특징으로 하는 가압가스를 이용한 액화천연가스순환기가 적용된 분사식 천연가스 액화장치.Injection natural gas liquefaction apparatus using a liquefied natural gas circulator using a pressurized gas comprising a; exhaust valve 350 for controlling the pressurized gas flowing out from the circulation tank (310).
  4. 제 1항에 있어서,The method of claim 1,
    상기 후단부(400)는The rear end 400 is
    상기 액화천연가스순환기(300)로부터 순환되는 포화액화천연가스에 함유된 고체를 제거하는 고체제거부(410)를 더 포함하는 것을 특징으로 하는 가압가스를 이용한 액화천연가스순환기가 적용된 분사식 천연가스 액화장치.Injection natural gas liquefaction applied to the liquefied natural gas circulator using a pressurized gas further comprises a solid removal unit 410 for removing the solid contained in the saturated liquefied natural gas circulated from the liquefied natural gas circulator 300 Device.
  5. 제 1항에 있어서,The method of claim 1,
    상기 가압가스를 이용한 액화천연가스순환기가 적용된 분사식 천연가스 액화장치(1000)는Injection-type natural gas liquefaction apparatus 1000 is applied to the liquefied natural gas circulator using the pressurized gas
    액화천연가스를 외부로 공급하는 액화천연가스공급부(500)를 더 포함하는 것을 특징으로 하는 가압가스를 이용한 액화천연가스순환기가 적용된 분사식 천연가스 액화장치.Injection natural gas liquefaction apparatus using a liquefied natural gas circulator using a pressurized gas, characterized in that it further comprises a liquefied natural gas supply unit for supplying liquefied natural gas to the outside.
  6. 제 1항에 있어서,The method of claim 1,
    상기 가압가스를 이용한 액화천연가스순환기가 적용된 분사식 천연가스 액화장치(1000)는Injection-type natural gas liquefaction apparatus 1000 is applied to the liquefied natural gas circulator using the pressurized gas
    천연가스를 공급받아 감압하여 저압팽창천연가스를 형성하며, 상기 분사식액화부(200)로 저압팽창천연가스를 공급하는 팽창밸브(100)를 더 포함하는 것을 특징으로 하는 가압가스를 이용한 액화천연가스순환기가 적용된 분사식 천연가스 액화장치.Liquefied natural gas using a pressurized gas further comprises a natural gas supplied to reduce the pressure to form a low pressure expansion natural gas, the expansion valve 100 for supplying a low pressure expansion natural gas to the injection type liquefaction unit 200 Injection natural gas liquefaction device with circulator.
  7. 제 1항에 있어서,The method of claim 1,
    상기 가압가스를 이용한 액화천연가스순환기가 적용된 분사식 천연가스 액화장치(1000)는Injection-type natural gas liquefaction apparatus 1000 is applied to the liquefied natural gas circulator using the pressurized gas
    상기 액화천연가스순환기(300)가 복수의 병렬구조로 형성되는 것을 특징으로 하는 가압가스를 이용한 액화천연가스순환기가 적용된 분사식 천연가스 액화장치.Injection natural gas liquefaction apparatus using a liquefied natural gas circulator using a pressurized gas, characterized in that the liquefied natural gas circulator 300 is formed in a plurality of parallel structure.
  8. 제 1항에 있어서,The method of claim 1,
    상기 가압가스를 이용한 액화천연가스순환기가 적용된 분사식 천연가스 액화장치(1000)는Injection-type natural gas liquefaction apparatus 1000 is applied to the liquefied natural gas circulator using the pressurized gas
    상기 과냉각부(420)가 상기 분사식액화부(200) 내부에 형성되는 것을 특징으로 하는 가압가스를 이용한 액화천연가스순환기가 적용된 분사식 천연가스 액화장치.Injection natural gas liquefaction apparatus using a liquefied natural gas circulator using a pressurized gas, characterized in that the subcooling unit (420) is formed in the injection type liquefaction unit (200).
PCT/KR2015/008309 2014-08-08 2015-08-07 Injection type apparatus for liquefying natural gas equipped with liquefied natural gas circulator using pressurized gas WO2016021990A1 (en)

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KR1020140102344A KR20160018159A (en) 2014-08-08 2014-08-08 Spray-type LNG Production Apparatus Including LNG Circulator Using Pressuring Gas

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