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WO2015152496A1 - Procédé de vaporisation atmosphérique de gaz de pétrole liquéfié, et système de vaporisation atmosphérique pour gaz de pétrole liquéfié - Google Patents

Procédé de vaporisation atmosphérique de gaz de pétrole liquéfié, et système de vaporisation atmosphérique pour gaz de pétrole liquéfié Download PDF

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Publication number
WO2015152496A1
WO2015152496A1 PCT/KR2014/012520 KR2014012520W WO2015152496A1 WO 2015152496 A1 WO2015152496 A1 WO 2015152496A1 KR 2014012520 W KR2014012520 W KR 2014012520W WO 2015152496 A1 WO2015152496 A1 WO 2015152496A1
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Prior art keywords
liquefied petroleum
petroleum gas
liquid
vaporization
storage tank
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PCT/KR2014/012520
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English (en)
Korean (ko)
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전승채
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Individual
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    • 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
    • F17C7/00—Methods or apparatus for discharging liquefied, solidified, or compressed gases from pressure vessels, not covered by another subclass
    • F17C7/02—Discharging liquefied gases
    • F17C7/04—Discharging liquefied gases with change of state, e.g. vaporisation
    • 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
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/05—Size
    • F17C2201/054—Size medium (>1 m3)
    • 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
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/05—Size
    • F17C2201/056—Small (<1 m3)
    • 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
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
    • F17C2205/0323—Valves
    • 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
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
    • F17C2205/0382—Constructional details of valves, regulators
    • 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
    • F17C2221/00—Handled fluid, in particular type of fluid
    • F17C2221/03—Mixtures
    • F17C2221/032—Hydrocarbons
    • F17C2221/035—Propane butane, e.g. LPG, GPL
    • 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
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
    • F17C2223/0146—Two-phase
    • F17C2223/0153—Liquefied gas, e.g. LPG, GPL
    • 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
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/03—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the pressure level
    • F17C2223/033—Small pressure, e.g. for liquefied 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
    • F17C2225/00—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel
    • F17C2225/01—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel characterised by the phase
    • F17C2225/0107—Single phase
    • F17C2225/0123—Single phase gaseous, e.g. CNG, GNC
    • 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
    • F17C2225/00—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel
    • F17C2225/03—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel characterised by the pressure level
    • F17C2225/033—Small pressure, e.g. for liquefied 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
    • F17C2225/00—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel
    • F17C2225/03—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel characterised by the pressure level
    • F17C2225/035—High pressure, i.e. between 10 and 80 bars
    • 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
    • F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
    • F17C2227/03—Heat exchange with the fluid
    • F17C2227/0302—Heat exchange with the fluid by heating
    • F17C2227/0304—Heat exchange with the fluid by heating using an electric heater
    • 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
    • F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
    • F17C2227/03—Heat exchange with the fluid
    • F17C2227/0302—Heat exchange with the fluid by heating
    • F17C2227/0309—Heat exchange with the fluid by heating using another fluid
    • F17C2227/0316—Water heating
    • 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
    • F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
    • F17C2227/03—Heat exchange with the fluid
    • F17C2227/0337—Heat exchange with the fluid by cooling
    • F17C2227/0341—Heat exchange with the fluid by cooling using another fluid
    • F17C2227/0344—Air cooling
    • 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
    • F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
    • F17C2227/03—Heat exchange with the fluid
    • F17C2227/0367—Localisation of heat exchange
    • F17C2227/0388—Localisation of heat exchange separate
    • F17C2227/0393—Localisation of heat exchange separate using a vaporiser

Definitions

  • the present invention relates to a method and a system for vaporizing liquefied petroleum gas, the atmospheric vaporization method of liquefied petroleum gas that can obtain a wider heat transfer area required for the vaporization of liquid liquefied petroleum gas and a higher temperature deviation between the atmosphere And to the system.
  • gas consumed in large quantities such as LPG
  • LPG liquid propane
  • a gaseous state in order to increase its volume, and when used, it is vaporized and used again.
  • FIG. 1 illustrates an example of using LPG in a small business place such as a restaurant.
  • LPG gas cylinder (1) is stored in the liquefied petroleum gas is stored, the demand is to directly use the gaseous liquefied petroleum gas in the upper portion of the LPG gas cylinder (1). That is, when the inside of the LPG gas cylinder 1 is maintained at a predetermined pressure, not only the liquid liquefied petroleum gas is stored therein, but also there is a certain amount of liquefied petroleum gas in the upper part of the gas liquefaction. The petroleum gas is used directly, so that a separate vaporizer is unnecessary.
  • the liquefied petroleum gas of the LPG gas cylinder (1) When the gaseous liquefied petroleum gas of the LPG gas cylinder (1) is leaked to the outside, the liquefied petroleum gas is vaporized by the amount of gaseous liquefied petroleum gas escaped from the inside of the LPG gas cylinder (1) to maintain the internal vapor pressure, but such vaporization
  • the temperature of the liquid liquefied petroleum gas is lowered due to the vaporization heat. The temperature is lowered to a temperature below the boiling point, and finally, it becomes impossible to vaporize.
  • this method is only used in small-scale workplaces and is not applicable to demanding users who use liquefied petroleum gas in large quantities.
  • FIG. 2 shows an atmospheric vaporization apparatus used when the storage temperature of liquefied gas, such as LNG, is very low.
  • the liquid liquefied gas in the liquefied storage tank 1 is discharged to the outside and then vaporized by passing through the atmospheric vaporization device (2), after which the customer uses the vaporized gas.
  • This method is applicable when there is a sufficient temperature deviation between the liquefied gas and the atmosphere.
  • liquefied gas stored at very low temperatures such as LNG is not a problem in the vaporization capacity because there is a sufficient temperature deviation with the atmosphere even in winter, but in the case of liquefied petroleum gas stored at 7 bar and 12 ° C like LPG, Since it may be lower than the temperature of the liquefied petroleum gas, it is difficult to use the atmospheric vaporization device in the winter, there is a problem that it is difficult to use because there is almost no temperature difference between the liquefied petroleum gas and the outside air.
  • FIG 3 shows an electrothermal heater vaporization apparatus for vaporizing and using liquefied petroleum gas stored at a relatively high temperature such as LPG.
  • the liquid liquefied petroleum gas in the liquefied storage tank 1 is discharged to the outside and then vaporized by passing through the heat transfer heater vaporization apparatus 2, and then the vaporized gas is used.
  • the electrothermal heater vaporization device (2) is provided with a water tank containing the water (3) for heat transfer and a heater device (4) for heating the water. That is, when the heater device 4 operated by electricity or the like generates heat, the water 3 is heated, and the liquid liquefied petroleum gas is vaporized by the heat of the water 3.
  • the present invention has been made to solve the problems of the prior art as described above, it is possible to use the atmospheric vaporization device for liquefied petroleum gas even when the atmospheric temperature is low, such as winter, while taking advantage of the atmospheric vaporization device is sufficient
  • the present invention provides a method and system for atmospheric vaporization of liquefied petroleum gas that can secure temperature deviation and heat transfer area, thereby improving performance of atmospheric vaporization system.
  • the present invention in the atmospheric vaporization method of liquefied petroleum gas to vaporize the liquid liquefied petroleum gas stored in the liquefied petroleum gas storage tank to the atmospheric vaporization unit: gas phase liquefaction of the liquefied petroleum gas storage tank A first liquefied petroleum gas discharge step of allowing the petroleum gas to flow into the atmospheric vaporization unit to lower the internal pressure of the liquefied petroleum gas storage tank and thereby lower the temperature of the liquefied petroleum gas in the liquid phase of the liquefied petroleum gas storage tank; And a second liquefied petroleum gas discharge step of allowing the liquid liquefied petroleum gas inside the liquefied petroleum gas storage tank having a temperature lowered by the first liquefied petroleum gas discharge step to flow to the atmospheric vaporization unit.
  • a liquefied petroleum gas storage tank in which liquefied petroleum gas is stored; Atmospheric vaporization unit for vaporizing the liquid liquefied petroleum gas stored in the liquefied petroleum gas storage tank;
  • a liquid discharge pipe having one end provided in the liquefied petroleum gas storage tank to discharge the liquid liquefied petroleum gas of the liquefied petroleum gas storage tank;
  • a gas discharge pipe having one end provided in the liquefied petroleum gas storage tank to discharge gaseous liquefied petroleum gas of the liquefied petroleum gas storage tank; (a) a valve body having a first liquid inlet connected to the other end of the liquid discharge pipe, a second gaseous inlet connected to the other end of the gas phase discharge pipe, and a first outlet connected to the atmospheric vaporization part; b) a first liquefied petroleum gas in which the second vapor inlet and the first outlet are in communication with each other and the first liquid inlet and the first outlet are in communication with each other according to the pressure applied to the second
  • the valve body of the automatic flow path switching valve includes: a first liquid inlet chamber communicating with the first liquid inlet, a second gas inlet chamber communicating with the second gas inlet, and an upper portion of the first liquid inlet chamber.
  • a first vaporizing outlet chamber formed in the first vaporizing outlet chamber and communicating with the first outlet, and a spring chamber formed on an upper portion of the first vaporizing outlet chamber;
  • the flow path switching member of the automatic flow path switching valve is provided to move up and down according to a pressure difference between the main elastic body provided in the spring chamber and the spring chamber, and the pressure of the downward pressure of the main elastic body and the first vaporizing outlet chamber.
  • the pressure difference detecting unit the upper end is fixed to the pressure difference detecting unit, the main rod to move up and down in conjunction with the vertical movement of the pressure difference detecting unit, located in the first liquid inlet chamber and according to the vertical movement of the main rod
  • a first valve body for controlling opening and closing between the first liquid inlet chamber and the first vaporizing outlet chamber, a first spring elastically supporting the first valve body in an upward direction, and the second gas inlet chamber and the first vaporization
  • the second vapor inlet by a pressure difference between the pressure of the second vapor inlet and a third spring elastically supported toward the second vapor inlet, It comprises a third valve body for controlling the opening and closing between the chamber and the first vaporization outlet chamber; This is preferred.
  • a liquefied petroleum gas storage tank in which liquefied petroleum gas is stored; Atmospheric vaporization unit for vaporizing liquid liquefied petroleum gas; A liquid discharge pipe having one end connected to the liquefied petroleum gas storage tank to discharge the liquid liquefied petroleum gas of the liquefied petroleum gas storage tank; A gas phase discharge pipe having one end connected to the liquefied petroleum gas storage tank for discharging the gaseous liquefied petroleum gas of the liquefied petroleum gas storage tank; A liquid pressure reducing unit provided at the other end of the liquid discharge pipe to reduce the pressure of the liquid liquefied petroleum gas; A vaporization part connecting pipe provided to supply the liquid liquefied petroleum gas decompressed in the liquid pressure reduction part to the atmospheric vaporization part; It is provided between the other end of the gas phase discharge pipe and the vaporization unit connecting pipe gaseous flow rate control to adjust the flow rate of the gaseous liquefied petroleum gas flowing from the gaseous discharge pipe to the vaporization
  • a liquid flow rate control unit is provided between the vaporization unit inlet pipe and the liquid pressure reducing unit, the liquid flow rate control unit is introduced into the liquid flow rate control unit by the first buoyancy material moved up and down according to the level of the liquid liquefied gas It is preferable that the amount of liquid liquefied gas to be adjusted.
  • the liquid leakage prevention device is provided at the rear end of the atmospheric vaporization portion, the liquid leakage prevention device, the inlet is formed in the lower portion and the outlet is formed in the upper portion, the second provided in the casing It may include a buoyancy material, an outlet closure member provided on the upper portion of the second buoyancy material and provided to block the outlet when the second buoyancy material moves upward, and a closing member pushing bar provided on the casing. have.
  • the present invention enables the atmospheric vaporization unit for liquefied petroleum gas to be used even when the atmospheric temperature is low, such as winter, while taking advantage of the atmospheric vaporization unit to secure a sufficient temperature deviation and heat transfer area. It can increase the performance.
  • the present invention vaporization of liquid liquefied petroleum gas naturally occurring in the liquefied petroleum gas storage tank, and lowering of the liquid liquefied petroleum gas in the liquefied petroleum gas storage tank generated thereby, and the liquid phase generated in the atmospheric vaporization unit
  • the vaporization capacity of the atmospheric vaporization system for the liquefied petroleum gas can be greatly increased, and thus it is possible to replace the electric heater heater vaporization apparatus using the conventional electricity.
  • FIG. 4 is a conceptual diagram of an atmospheric vaporization system for liquefied petroleum gas which is a first embodiment according to the present invention
  • FIG. 5 is an enlarged conceptual sectional view of the automatic flow path switching valve of FIG. 4;
  • FIG. 6 is an operation cross-sectional view of the automatic flow path switching valve in the first liquefied petroleum gas discharge mode
  • FIG. 8 and 9 are enlarged views of the liquid leakage prevention apparatus of FIG.
  • FIG. 10 is a conceptual diagram of an atmospheric vaporization system for liquefied petroleum gas according to a second embodiment of the present invention.
  • FIG. 11 is an enlarged view of the liquid pressure reducing part, the liquid flow rate adjusting part, and the gas phase flow rate adjusting part of FIG. 10;
  • FIG. 4 is a conceptual diagram of the atmospheric vaporization system for liquefied petroleum gas according to the first embodiment of the present invention
  • Figure 5 is an enlarged conceptual sectional view of the automatic flow path switching valve of Figure 4
  • Figure 6 is a first liquefied petroleum gas discharge mode
  • Fig. 7 is an operation sectional view of the automatic flow path switching valve in the case of the second liquefied petroleum gas discharge mode
  • Figs. 8 and 9 are enlarged views of the liquid leakage preventing device of Fig. 4. .
  • This system is largely liquefied petroleum gas storage tank 100, liquid discharge pipe 110, gas phase discharge pipe 120, automatic flow path switching valve 200, atmospheric vaporization unit 300, liquid leakage prevention device 400 ) And the like.
  • Liquefied petroleum gas is stored in the liquefied petroleum gas storage tank 100, the inside of the liquefied petroleum gas storage tank 100 is maintained at a constant pressure, the inside of the liquid liquefied petroleum gas and liquefied petroleum gas The liquefied petroleum gas produced is present.
  • LPG maintains a pressure of about 7 bar when the ambient temperature is 12 °C.
  • liquid discharge pipe 110 is connected to the liquefied petroleum gas storage tank 100 to discharge the liquid liquefied petroleum gas from the liquefied petroleum gas storage tank 100, and a gaseous discharge pipe ( One end of the 120 is connected to the liquefied petroleum gas storage tank 100.
  • one end of the liquid discharge pipe 110 is connected to the lower portion of the liquefied petroleum gas storage tank 100 so that the liquid liquefied petroleum gas flows, one end of the gas phase discharge pipe 120 may be introduced into the liquefied petroleum gas gas It is connected to the upper portion of the liquefied petroleum gas storage tank (100).
  • the other ends of the liquid discharge pipe 110 and the gas phase discharge pipe 120 are respectively connected to the automatic flow path switching valve 200.
  • the atmospheric vaporization unit 300 is connected to the first outlet 203 of the automatic flow path switching valve 200.
  • Atmospheric vaporization unit 300 is a device for vaporizing the liquid liquefied petroleum gas by heat exchange with the atmosphere, so a detailed description thereof will be omitted.
  • liquid leakage prevention device 400 is provided at the rear end of the atmospheric vaporization unit 300.
  • the automatic flow path switching valve 200 may be configured according to the pressure applied to the second gas inlet 202 (same as the internal pressure of the liquefied petroleum gas storage tank 100), i) the second gas inlet 202 and the first outlet ( 203 is in communication with each other, the first liquid inlet 201 and the first outlet 203 is the first liquefied petroleum gas discharge mode in which communication with each other is blocked, ii) the second gas phase inlet 202 and the first outlet ( Communication with each other 203 is blocked and the first liquid inlet 201 and the first outlet 203 is automatically switched to any one of the second liquefied petroleum gas discharge mode in communication with each other.
  • valve body of the automatic flow path switching valve 200 includes a first liquid inlet chamber 210 communicating with the first liquid inlet 201 and a second gas inlet chamber 220 communicating with the second gas inlet 202. And a first vaporization outlet chamber 230 formed at an upper portion of the first liquid inlet chamber 210 and communicating with the first outlet 203, and formed at an upper portion of the first vaporization outlet chamber 230.
  • the spring chamber 270 is formed.
  • various flow path switching members are provided in the valve body of the automatic flow path switching valve 200 to switch the flow path.
  • the main elastic body 271 and the pressure difference detecting unit 272 are provided in the spring chamber 270.
  • the main elastic material 271 applies downward pressure to the pressure difference detecting unit 272, and the pressure difference detecting unit 272 is configured to control the downward pressure of the main elastic material 271 and the first vaporization outlet chamber 230. It moves up and down according to the pressure difference.
  • the membrane is used as the pressure difference detecting unit 272 in this embodiment, this is only one example and various methods may be applied.
  • the main rod 281 is provided on the membrane 272 as described above.
  • the top of the main rod 281 is fixed to the membrane 272 to move up and down in conjunction with the vertical movement of the membrane 272.
  • the first valve body 283 is provided in the first liquid inlet chamber 210.
  • the first valve body 283 is located in the first liquid inlet chamber 210, and opens and closes between the first liquid inlet chamber 210 and the first vaporizing outlet chamber 230 according to the vertical movement of the main rod 281. Will be adjusted.
  • first liquid inlet chamber 210 is provided with a first spring 284 for applying an upward elastic force to the first valve body 283.
  • the first valve body 283 is opened by moving the lower portion by the main rod 281.
  • the first valve body 283 moves. Is closed by moving upward by the first spring 284.
  • a third valve body 289 is provided between the second gaseous inlet chamber 220 and the first vaporization outlet chamber 230.
  • the third valve body 289 is elastically supported by the third spring 290 toward the second gas inlet 202 side.
  • the third valve body 289 blocks communication between the second gas inlet chamber 220 and the first vaporization outlet chamber 230.
  • the third valve body 289 is opened.
  • the liquefied petroleum gas of the gaseous phase is discharged to the atmospheric vaporization unit 300 to lower the internal pressure of the liquefied petroleum gas storage tank 100, whereby The temperature of the liquid liquefied petroleum gas stored in the liquefied petroleum gas storage tank 100 is lowered.
  • the pressure of the second gas phase inlet 202 of the automatic flow path switching valve 200 connected to the gas phase discharge pipe 120 is high, so that the third valve body 289 is opened.
  • the second vapor inlet 202, the second vapor inlet chamber 220, and the second vaporization outlet chamber 230 communicate with each other.
  • the first valve body 283 moves upward by the first spring 284 to communicate with the first liquid inlet chamber 210 and the first vaporization outlet chamber 230. This is a blocked state.
  • the automatic flow path switching valve 200 communicates with the second gas inlet 202 and the first outlet 203 and the first liquid inlet 201 blocks the communication with the first outlet 203.
  • the liquefied petroleum gas of the gas phase is supplied to the atmospheric vaporization unit 300 is a first liquefied petroleum gas discharge mode.
  • the liquefied petroleum gas in the gaseous phase inside the liquefied petroleum gas storage tank 100 flows into the second gas phase inlet 202 via the gas phase discharge pipe 120 and then passes through the first outlet 203. It is vaporized while passing through the atmospheric vaporization unit 300 is discharged to the outside.
  • the internal pressure of the liquefied petroleum gas storage tank 100 is lowered, and the temperature of the liquid liquefied petroleum gas is also lowered.
  • the pressure of the gaseous liquefied petroleum gas is lower than the reference pressure, the pressure of the second gas phase inlet 202 of the automatic flow path switching valve 200 connected to the gas phase discharge pipe 120 is low, so that the third valve body 268 does not open. Therefore, communication between the second vapor inlet chamber 220 and the first vaporizing outlet chamber 230 is blocked.
  • the pressure difference detecting unit 272 is moved downward by the main elastic body 271, and also moves to the lower part of the main rod 281.
  • the main rod 281 is lowered by the pressure received by the pressure difference detecting unit 272, and the main rod 281 pushes the first valve body 283 to open the first valve body 283.
  • the one liquid inlet chamber 210 and the first vaporization outlet chamber 230 are in communication with each other.
  • the automatic flow path switching valve 200 communicates with the first liquid inlet 201 and the first outlet 203, and the second gas inlet 202 and the first outlet 203 communicate with each other. Communication is blocked, and the liquid liquefied petroleum gas is converted into the second liquefied petroleum gas discharge mode supplied to the atmospheric vaporization unit 300.
  • the structure of the liquid leakage prevention apparatus 400 will be described with reference to FIGS. 8 and 9.
  • the liquid leakage preventing device 400 includes a casing 410, a second buoyancy material 420, an outlet closing member 421, a closing member pushing bar 430, and the like.
  • the casing 410 is a tub formed vertically long, and an inlet 411 is formed at a lower portion thereof, and an outlet 412 is formed at an upper portion thereof.
  • the second buoyancy material 420 is provided inside the casing 410.
  • the second buoyancy material 420 is suspended along the liquid liquefied petroleum gas when the liquid liquefied petroleum gas is present in the casing 410.
  • An outlet closing member 421 for blocking the outlet 412 is provided on the second buoyancy member 420.
  • the closing member pushing bar 430 is provided on the upper portion of the casing 410, and the closing member pushing bar 430 is elastically supported upward by the auxiliary spring 431.
  • the closing member pushing bar 430 When the liquefied petroleum gas of the gaseous phase collects in the casing 410 in a state in which the outlet member 421 blocks the outlet 412, the closing member pushing bar 430 has a pressure greater than that of atmospheric pressure. Since it is high, even if the level of the liquid liquefied petroleum gas is lowered is provided to prevent the outlet closing member 421 is still blocking the outlet 412, by pushing the closing member pushing bar 430 to the bottom thereby As the outlet closing member 421 moves downward, the outlet 412 is opened so that the liquefied petroleum gas in the gas phase is normally discharged to the outside.
  • the atmospheric vaporization unit 300 When the atmospheric vaporization unit 300 is not operated (that is, when liquefied petroleum gas is not leaked to the outside), the interior of the liquefied petroleum gas storage tank 100 is maintained at a pressure of about 7bar, wherein the boiling point of the LPG 11.2 ° C. (This is an example.)
  • the first liquefied petroleum gas discharge step of discharging the liquefied petroleum gas in the gaseous phase is first performed.
  • the liquefied petroleum gas in the gas phase is continuously discharged until the internal pressure of the liquefied petroleum gas storage tank 100 is lowered to 2 bar (one example of the reference pressure).
  • Adjustment of the reference pressure may be made in the automatic flow path switching valve 200, the reference pressure may vary in accordance with the use environment.
  • the boiling point of the LPG is -25.9 °C. That is, when the temperature of the liquid liquefied petroleum gas is -25.9 ° C. or more, vaporization is continuously generated in the liquefied petroleum gas storage tank 100.
  • the second liquefied petroleum gas discharge step of discharging the liquid liquefied petroleum gas is performed.
  • the temperature deviation between the liquid liquefied petroleum gas and the atmosphere in the atmospheric vaporization unit 300 is at least the original temperature deviation (based on the temperature of the liquid liquefied petroleum gas of 11.2 °C) In comparison, an increase of about 37.1 ° C. (11.2 + 25.9) occurs, thereby enabling effective vaporization.
  • the atmospheric temperature is assumed to be 11.2 ° C., no vaporization occurs at all in the conventional atmospheric vaporization apparatus, but the normal liquid liquefied petroleum gas can be vaporized in this system.
  • the temperature of the air is assumed to be 21.2 ° C, the temperature deviation is only 10 ° C in the conventional atmospheric vaporizer, but 47.1 ° C in this system, it can have almost five times the vaporization capacity.
  • the liquefied petroleum gas storage tank 100 in which the temperature of the liquid liquefied petroleum gas is lowered by the first liquefied petroleum gas discharge mode in this system is utilized as the surface area of the liquefied petroleum gas storage tank 100 and the heat exchange area with the atmosphere. have.
  • the system can achieve very high vaporization performance due to a very high temperature deviation from the atmosphere and an expanded heat exchange area as compared with simply vaporizing liquid liquefied petroleum gas.
  • FIG. 10 is a conceptual diagram of an atmospheric vaporization system for liquefied petroleum gas according to the second embodiment of the present invention
  • FIG. 11 is an enlarged view of the liquid pressure reducing unit, the liquid flow rate adjusting unit, and the gas phase flow rate adjusting unit of FIG. 10
  • FIGS. 12 and FIG. 13 is an enlarged view of the liquid phase flow control unit
  • FIGS. 14 and 15 are enlarged views of the gas phase flow control unit.
  • This system is largely liquefied petroleum gas storage tank 100, liquid discharge pipe 110, gas phase discharge pipe 120, liquid pressure reducing unit 130, liquid flow control unit 140, gas phase flow control unit 150 , Vaporization unit connecting pipe 160, atmospheric vaporization unit 300, liquid leakage prevention device 400 and the like.
  • the liquefied petroleum gas is stored in the liquefied petroleum gas storage tank 100, and the liquefied petroleum gas in the liquefied petroleum gas storage tank 100 is formed by evaporating the liquid liquefied petroleum gas and the liquid liquefied petroleum gas. do.
  • LPG maintains a pressure of about 7 bar when the atmospheric temperature is 12 °C.
  • one end of the liquid discharge pipe 110 is connected to the liquefied petroleum gas storage tank 100, and the liquefied gaseous phase from the liquefied petroleum gas storage tank 100.
  • One end of the gas phase discharge pipe 120 is connected to the liquefied petroleum gas storage tank 100 to discharge the petroleum gas.
  • one end of the liquid discharge pipe 110 is connected to the lower portion of the liquefied petroleum gas storage tank 100 so that the liquid liquefied petroleum gas flows, one end of the gas phase discharge pipe 120 may be introduced into the liquefied petroleum gas gas It is connected to the upper portion of the liquefied petroleum gas storage tank (100).
  • the other end of the liquid discharge pipe 110 is provided with a liquid pressure reducing unit 130.
  • the liquid pressure reducing unit 130 adopts a pressure reducing valve.
  • a pressure reducing valve refers to a valve which depressurizes a liquid when the pressure of the liquid is higher than the intended use, and keeps the reduced pressure constant.
  • the pressure reducing valve in this embodiment can maintain the pressure on the secondary side (that is, the pressure after decompression) at about 2 bar (of course, this pressure can be adjusted according to the embodiment).
  • the pressure reducing valve is a very general technique and is not limited to the drawings of the present embodiment, and various kinds of valves may be used, and thus detailed description thereof will be omitted.
  • the liquid flow rate adjusting unit 140 is provided at the rear end of the liquid pressure reducing unit 130.
  • the liquid flow rate adjusting unit 140 supplies an excessive amount of liquid liquefied petroleum gas to the atmospheric vaporization unit 300, that is, an excessive amount of liquid liquefied petroleum gas flows from the liquefied petroleum gas storage tank 100. It serves to prevent.
  • the structure of the liquid flow control unit 140 will be described later.
  • the vaporization part connecting pipe 160 is provided at the rear end of the liquid flow control unit 140.
  • the vaporization unit connecting pipe 160 is provided to supply the liquid liquefied petroleum gas decompressed in the liquid pressure reduction unit 130 to the atmospheric vaporization unit (300).
  • the vaporization part connecting pipe 160 is connected to the other end of the gas phase discharge pipe 120 through the gas flow rate adjusting part 150. That is, the vaporization unit connecting pipe 160 also has a role of supplying the gaseous liquefied petroleum gas supplied from the gas phase discharge pipe 120 to the atmospheric vaporization unit 300.
  • the gas phase flow rate control unit 150 is a gas phase discharge pipe 120 according to the pressure of the gaseous liquefied petroleum gas of the gas phase discharge pipe 120 (substantially the same as the pressure of the gaseous liquefied petroleum gas of the liquefied petroleum gas storage tank 100). It is to control the amount of gaseous liquefied petroleum gas supplied from the vaporization portion connecting pipe 160 from.
  • the gas flow rate adjusting unit 150 of the present embodiment has a first through hole 151 a formed along a center thereof, and a guide protrusion 151 b on one side of the first through hole 151 a.
  • Tube 152 is provided so as to slide along the first body 151 and protrudes in the guide body 151b of the first body 151 is formed in one side a plurality of second through holes (152a) is formed. ),
  • a plurality of second through holes 152a are formed along the main surface of the sliding tube 152, and a plurality of second through holes 152a are formed along the axial direction of the sliding tube 152.
  • the gas phase flow rate controller 150 allows the first member 151a to close while the sealing member 153 is in contact with the guide protrusion 151b by the elastic force of the compression spring 154 (see FIG. 14). ).
  • the pressure of the gaseous liquefied petroleum gas increases, the amount of gaseous liquefied petroleum gas supplied to the vaporization connector pipe 160 increases, and when the pressure of the gaseous liquefied petroleum gas decreases, the gaseous phase supplied to the vaporization connector pipe 160.
  • the amount of liquefied petroleum gas is reduced, and when the pressure of the liquefied petroleum gas is further lowered, the liquefied petroleum gas is no longer supplied.
  • the liquid flow rate adjusting unit 140 as shown in FIGS. 11 to 13, the casing 141, the first buoyancy material 142, the sealing rod 143, the guide tube 144, and the guide. It includes a stopper 145, a sealing plate 146, a valve body 147, a valve spring 148, and the like.
  • the casing 141 is a cylinder formed vertically long and has an outlet 141a formed at a lower portion thereof, and an inlet 141b formed at an upper portion thereof.
  • the first buoyancy material 142 is provided inside the casing 141.
  • the first buoyancy material 142 is suspended along the liquid liquefied petroleum gas when the liquid liquefied petroleum gas is present in the casing 141.
  • the sealing rod 143 is vertically fixed to the upper portion of the first buoyancy material 142.
  • the inlet 141b of the casing 141 is provided with a guide tube 144 in the vertical direction.
  • a first flow hole 144a is formed in the upper sidewall of the guide tube 144, and a second flow hole 144b is formed in the lower sidewall of the guide tube 144.
  • valve seat surface 144c is formed inside the upper portion of the first flow hole 144a of the guide tube 144.
  • the lower end of the guide tube 144 is provided with a bar guide member 145 for guiding the vertical movement of the sealing rod 143.
  • An airtight plate 146 having an opening hole 146a is fixedly provided in the vertical direction of the guide tube 144.
  • the opening hole 146a of the sealing plate 146 is opened or closed by the sealing rod 143.
  • valve body 147 having a central through hole 147a is elastically supported by the valve spring 148.
  • valve body 147 When there is no external force, the valve body 147 contacts the valve seat surface 144c by the elastic force of the valve spring 148 to block the flow of the liquid liquefied petroleum gas.
  • the liquid liquefied petroleum gas passes through the central hole 147a of the valve body 147, the opening hole 146a of the sealing plate 146, and the guide pipe.
  • the liquid liquefied petroleum gas flows into the casing 141 through the second flow hole 144b of 144, and the flow of the liquid liquefied petroleum gas causes the pressure difference with the valve body 147 interposed therebetween.
  • the liquid liquefied petroleum gas is also introduced into the first flow hole 144a of the guide pipe 144 when the valve body 147 is spaced apart from the valve seat surface 144c.
  • the liquid flow rate adjusting unit 140 supplies an excessive amount of liquid liquefied petroleum gas to the atmospheric vaporization unit 300, that is, an excessive amount of liquid liquefied petroleum oil from the liquefied petroleum gas storage tank 100. It serves to prevent the outflow of gas.
  • liquid liquefied petroleum gas decompressed in the liquid pressure reducing unit 130 and the gaseous liquefied petroleum gas supplied from the gas phase flow rate control unit 150 are supplied to the vaporization unit connecting pipe 160 to the atmospheric vaporization unit 300. Supplied.
  • Atmospheric vaporization unit 300 is a device for vaporizing the liquid liquefied petroleum gas by heat exchange with the atmosphere, so a detailed description thereof will be omitted.
  • Atmospheric vaporization unit 300 is the vaporized liquefied petroleum gas gas is already vaporized through the liquid liquefied petroleum gas to make the liquid liquefied petroleum gas more active vaporization.
  • liquid leakage prevention device 400 is provided at the rear end of the atmospheric vaporization unit 300.
  • the structure of the liquid leakage prevention apparatus 400 may refer to the description of FIG. 8.
  • the atmospheric vaporization unit 300 When the atmospheric vaporization unit 300 is not operated (that is, when liquefied petroleum gas is not leaked to the outside), the interior of the liquefied petroleum gas storage tank 100 is maintained at a pressure of about 7bar, wherein the boiling point of the LPG 11.2 ° C. (This is an example.)
  • the liquefied petroleum gas in the gas phase is discharged through the gas phase discharge pipe 120.
  • the liquefied petroleum gas in the gas phase is discharged to the atmospheric vaporization unit 300 through the gas phase flow control unit 150 and the vaporization unit connecting pipe 160 because it is relatively high pressure.
  • the internal pressure of the liquefied petroleum gas storage tank 100 may be gradually lowered.
  • the boiling point of the LPG is -25.9 ° C, that is, the liquid liquefied petroleum gas storage tank continuously at a temperature of -25.9 ° C or higher. Vaporization is generated inside 100.
  • the liquid liquefied petroleum gas when the liquid liquefied petroleum gas is vaporized in the atmospheric vaporization unit 300, the liquid liquefied petroleum gas storage tank 100, the liquid discharge pipe 110, the liquid pressure reducing unit 130, the liquid flow rate control by the amount
  • the liquid liquefied petroleum gas is supplied to the atmospheric vaporization part 30 through the part 140 and the vaporization part connecting pipe 160.
  • the liquid liquefied petroleum gas is supplied under reduced pressure at a pressure of 2 bar in the liquid pressure reducing unit 130, and is supplied to the atmospheric vaporization unit 30 at ⁇ 25.9 ° C.
  • FIG. 1 the liquid liquefied petroleum gas is supplied under reduced pressure at a pressure of 2 bar in the liquid pressure reducing unit 130, and is supplied to the atmospheric vaporization unit 30 at ⁇ 25.9 ° C.
  • the temperature deviation between the liquid liquefied petroleum gas and the air in the atmospheric vaporization unit 300 is at least the original temperature deviation (based on the temperature of the liquid liquefied petroleum gas at 11.2 ° C.).
  • An increase of about 37.1 ° C. (11.2 + 25.9) occurs as compared to the effective vaporization.
  • the atmospheric temperature is assumed to be 11.2 ° C., no vaporization occurs at all in the conventional atmospheric vaporization apparatus, but the normal liquid liquefied petroleum gas can be vaporized in this system.
  • the temperature of the air is assumed to be 21.2 ° C, the temperature deviation is only 10 ° C in the conventional atmospheric vaporizer, but 47.1 ° C in this system, it can have almost five times the vaporization capacity.
  • the liquefied petroleum gas storage tank 100 in which the temperature of the liquid liquefied petroleum gas is lowered by the discharge of the gaseous liquefied petroleum gas is used for its surface area and heat exchange area with the atmosphere.
  • the system can achieve very high vaporization performance due to a very high temperature deviation from the atmosphere and an expanded heat exchange area, compared with the conventional simple gasification of liquid liquefied petroleum gas.
  • the gaseous liquefied petroleum gas is supplied at a pressure of 2 bar, and the liquid liquefied petroleum gas is also supplied at a pressure of 2 bar. It will be undesirable in that the endothermic burden of 100 is extremely high and a sudden load change of the atmospheric vaporization unit 300 may appear.
  • the gaseous liquefied petroleum gas may be designed to be supplied at a pressure slightly higher (about 3 to 5 bar) than the reduced pressure of the liquid liquefied petroleum gas. That is, gaseous liquefied petroleum gas is supplied at a pressure of about 3 to 5 bar (of course, the amount of supply varies depending on the pressure), and the liquid liquefied petroleum gas is decompressed to 2 bar while maintaining the state of being stored at 3 to 5 bar. If possible, the load variation of the liquid pressure reduction unit 130 and the atmospheric vaporization unit 300 may be minimized.
  • the design criteria, such as 3 ⁇ 5bar, 2bar may vary depending on the embodiment.
  • the present invention can be used to vaporize liquid liquefied petroleum gas.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

La présente invention concerne un procédé de vaporisation atmosphérique de gaz de pétrole liquéfié, et un système pour celui-ci, qui, lorsqu'on recherche la vaporisation de gaz de pétrole liquéfié à utiliser, permet à un vaporisateur atmosphérique d'être utilisé même à une faible température d'air, telle qu'en hiver, non seulement pour tirer profit du vaporisateur atmosphérique, mais également pour obtenir un écart suffisant de température et une zone de transmission de chaleur, la performance du système de vaporisation atmosphérique étant améliorée.
PCT/KR2014/012520 2014-04-01 2014-12-18 Procédé de vaporisation atmosphérique de gaz de pétrole liquéfié, et système de vaporisation atmosphérique pour gaz de pétrole liquéfié Ceased WO2015152496A1 (fr)

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KR1020140038475A KR101575028B1 (ko) 2014-04-01 2014-04-01 액화석유가스용 대기식 기화 시스템
KR10-2014-0038475 2014-04-01

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Publication number Priority date Publication date Assignee Title
IT202200009416A1 (it) * 2022-05-06 2023-11-06 Pierluigi Paris Centralina per grossi impianti a GPL

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KR102349518B1 (ko) 2017-11-24 2022-01-10 주식회사 엘지화학 액상 프로판의 기화 방법 및 이에 사용되는 기화 장치

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JPH0662275U (ja) * 1993-02-09 1994-09-02 日立化成工業株式会社 フロート式逆止弁
JP2002089790A (ja) * 2000-09-13 2002-03-27 Ito Koki Kk Ｌｐｇの気化機構
KR200421595Y1 (ko) * 2006-04-14 2006-07-13 주식회사 유엔에스 엘피지용 대기식 기화장치
KR20080081571A (ko) * 2007-03-06 2008-09-10 신용에너지주식회사 액 유출 방지장치
KR101368379B1 (ko) * 2012-12-26 2014-02-28 전승채 초저온 액화가스 저장탱크 시스템 및 이를 위한 자동 유로 전환 밸브

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Publication number Priority date Publication date Assignee Title
JPH0662275U (ja) * 1993-02-09 1994-09-02 日立化成工業株式会社 フロート式逆止弁
JP2002089790A (ja) * 2000-09-13 2002-03-27 Ito Koki Kk Ｌｐｇの気化機構
KR200421595Y1 (ko) * 2006-04-14 2006-07-13 주식회사 유엔에스 엘피지용 대기식 기화장치
KR20080081571A (ko) * 2007-03-06 2008-09-10 신용에너지주식회사 액 유출 방지장치
KR101368379B1 (ko) * 2012-12-26 2014-02-28 전승채 초저온 액화가스 저장탱크 시스템 및 이를 위한 자동 유로 전환 밸브

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT202200009416A1 (it) * 2022-05-06 2023-11-06 Pierluigi Paris Centralina per grossi impianti a GPL

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