KR20150037268A - Liquefied gas container with heating system using external air - Google Patents

Abstract

The present invention relates to a low temperature container having a heating system using external air and, more specifically, to a low temperature container having a heating system using external air to heat a low temperature container by allowing air around the low temperature container to flow into the low temperature container, drying the air using cold air inside the low temperature container, and supplying the air to the inside or outside of the low temperature container without the use of a separate heating gas or hater, thereby reducing a cost for heating.

Description

[0001] LIQUEFIED GAS CONTAINER WITH HEATING SYSTEM USING EXTERNAL AIR [0002]

The present invention relates to a low-temperature container equipped with an elevated temperature system using outside air, more particularly, to a device for introducing air around a container, drying the container using cold air in a low-temperature container, Temperature vessel equipped with a temperature-raising system using outside air that reduces the heating-up cost which does not require a device such as a temperature-rising gas or a heater.

Substances with low liquidus temperatures, such as liquefied nitrogen, are stored in special containers because they must remain in a cryogenic condition. Such a special container is called a low-temperature container, and the temperature is maintained between minus 40 ° C and minus 200 ° C. The low-temperature container is composed of a reservoir for storing the liquefied gas and a vacuum insulation layer surrounding the liquefied gas.

The low-temperature container for storing the low-temperature fluid is also required to be maintained or repaired, and the low-temperature container needs to be heated again.

Methods of raising the temperature of the low-temperature vessel generally include a method of installing an electric heater inside the vessel, a method of introducing gas not containing moisture into the vessel, and a method of increasing the heat flow rate by increasing the pressure of the heat insulating layer.

However, the electric heater has a high installation cost, high power consumption rate, and difficulty in maintenance, and the method of introducing gas requires a large amount of gas, which is costly and inefficient. In addition, in the method of increasing the pressure in the heat insulating layer, a process of spraying dry gas to prevent condensation inside the heat insulating layer is required, which is time consuming and costly.

Japanese Patent Application Laid-Open No. 2007-263342 discloses a method for raising the temperature of an LP gas bulk storage container by flowing an antifreeze through the bottom of the storage container. However, the cost of the anti- There is a limitation in that the degree of difficulty is high.

Accordingly, there is a need for a technique for a low-temperature container structure equipped with a temperature-raising system using outside air, in which the temperature of the low-temperature container is rapidly increased without excessive cost and condensation does not occur around the container.

An object of the present invention is to provide a device for introducing air around a container and drying it by using cold air in a low temperature container and then supplying it to the inside or outside of the low temperature container to raise the temperature, Temperature cryocooler with a temperature-raising system using ambient air that reduces the temperature of the container.

In order to solve the above-described problems, the present invention provides a fluid storage device comprising: a storage unit 110 having a space capable of accommodating a fluid; a heat insulating layer 120 formed on an outer circumferential surface of the storage unit 110; And a drying chamber 200 connected to the discharge tube 130 and connected to the heat insulating layer 120 through an air injection tube 230. The drying chamber 200 introduces outside air to the air injection tube 230, And the external air flows into the heat insulating layer 120 through the opening.

The heat storage layer 121 is formed on the outer circumferential surface of the storage part 111. The storage part 111 and the gas discharge pipe 131 are connected to each other. And the drying chamber 201 flows outside air into the storage portion 111 through the air injection pipe 231 connected to the storage portion 111. The drying chamber 201 is connected to the storage portion 111, .

The heat storage layer 122 is formed on the outer circumferential surface of the storage part 112. The storage part 112 is connected to the gas discharge pipe 132, And a drying chamber 202 connected to the heat insulating layer 122 and the air injection pipe 232a by a pipe 232b and the drying chamber 202 introduces outside air to the heat insulating layer 122 and the storage (112).

At this time, the gas discharge pipe may be formed in a curved shape inside the drying chamber.

At this time, a drain port is formed at the lower end of the drying chamber, and when the drain port has a water level higher than a predetermined value, the drain port may be opened.

At this time, a temperature measuring unit for measuring the temperature may be provided on the surface of the storage unit, and when the surface temperature is higher than a preset value, the air injection pipe may be closed.

At this time, a heater may be installed around the air injection pipe.

At this time, the air injection pipe may be provided with a mass flow controller for checking the amount of water contained in the outside air.

At this time, the condensation collector may be formed at the lower end of the outer circumferential surface of the heat insulating layer.

The present invention reduces the installation cost and the cost of the heating process by increasing the temperature of the low temperature vessel by utilizing the air around the vessel without introducing any electric heater or drying gas.

In addition, the present invention does not require a separate drying gas to be supplied by drying the outside air using the cold air inside the container, and can prevent the dew condensation that occurs at the time of the temperature increase.

Further, in the present invention, a condensation collecting unit is provided at the lower end of the vessel to discharge condensation that may be generated.

Further, since the present invention can be installed in a conventional low-temperature container, it has high industrial applicability and excellent compatibility.

1 is a structural view of a first embodiment of a low-temperature container equipped with a temperature-raising system using the outside air of the present invention.
2 is an operational flowchart of the first embodiment of the present invention.
3 is a structural view of a second embodiment of a temperature raising device of a low-temperature container equipped with a temperature raising system using the outside air of the present invention.
4 is an operational flowchart of a second embodiment of the present invention.
FIG. 5 is a structural view of a third embodiment of a low-temperature container equipped with a temperature-raising system using the outside air of the present invention.
FIG. 6 is an operational flowchart of a third embodiment of the present invention.
7 is a structural view of a fourth embodiment of a low-temperature vessel equipped with a temperature-raising system using the outside air of the present invention.
Fig. 8 is a flowchart showing the operation of the fourth embodiment of the present invention.

The present invention will now be described in detail with reference to the accompanying drawings. Hereinafter, a repeated description, a known function that may obscure the gist of the present invention, and a detailed description of the configuration will be omitted. Embodiments of the present invention are provided to more fully describe the present invention to those skilled in the art. Accordingly, the shapes and sizes of the elements in the drawings and the like can be exaggerated for clarity.

Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a structural view of a first embodiment of a low-temperature vessel equipped with a temperature-raising system using the outside air of the present invention, and Fig. 2 is an operational flowchart for the first embodiment of the present invention. The flow of gas is shown as first arrow 10, the flow of outside air as second arrow 20, and the flow of heat as third arrow 30.

Referring to FIG. 1, the cryogenic vessel 100 of the first embodiment of the present invention includes a reservoir 110 for receiving a liquefied gas, a vacuum chamber 110 formed on the outer wall of the reservoir 110 for interrupting heat exchange with outside air, The low temperature vessel 100 and the drying chamber 200 are connected to a gas discharge pipe 130 through which a fluid can flow and a first valve 300 for opening and closing the gas discharge pipe 130 is installed .

The drying chamber 200 is a device for flowing outside air into the inside of the drying chamber 200 to dry it. The drying chamber 200 is formed with an outside air inlet pipe 210 through which the outside air can be introduced through the valve control of the second valve 310 and a drain outlet 220 through which the collected water is discharged through the drying process of the outside air . The outside air inflow pipe 210 is provided with a second valve 310 for opening and closing the outside air inflow pipe 210 to control the flow of outside air. The drain port 220 is provided with a third valve 320 for controlling the water level in the drying chamber 200 by opening and closing the drain port.

When the outside air is dried, cold air of the liquefied gas stored in the storage unit 110 is used instead of a separate device. The storage unit 110 and the drying chamber 200 are connected to the gas discharge pipe 130 so that the vaporized liquefied gas flows along the gas discharge pipe 130. The gas discharge pipe 130 is connected to the inside of the drying chamber 200 And is heat-exchanged with the outside air introduced into the drying chamber 200. The drying chamber 200 is formed of a metal plate,

In order to maximize the drying effect by maximizing the surface area with the outside air, the moisture contained in the outside air is brought into contact with the cold discharge pipe 130, thereby liquefying the water and causing dew on the surface of the discharge pipe 130. When the dew condensation is collected to a certain extent, it falls to the bottom surface of the drying chamber 200, and when the condensation is above a predetermined height after the condensation is received, it is discharged to the outside through valve control of the third valve 320.

The gas absorbing the heat from the outside air is discharged along the gas discharge pipe 130 formed outside the drying chamber 200 and the outside air that has released the heat flows along the air injection pipe 230 connected to the heat insulating layer 120 of the low temperature vessel 100 And flows into the heat insulating layer 120 through the valve control of the fourth valve 340.

That is, the amount of air injected into the heat insulating layer 120 is controlled by operating the fourth valve 340 installed in the air injection pipe 230.

In addition, the air injection pipe 230 may further include a heater around the air injection pipe 230 to heat the outside air dried in the drying chamber 200, thereby improving the temperature raising effect.

The air injection pipe 230 is provided with a mass flow controller 240 to check the amount of outside air to be injected. As the outside air is injected into the heat insulation layer 120, the pressure rises, and the first pressure meter 250 connected to the heat insulation layer 120 measures the pressure.

The injected outside air flows through the outer wall of the storage part 110 in which the liquefied gas is stored in a dry state to perform heat exchange. Since the temperature of the liquefied gas is lower than that of the exhaust gas flowing along the gas discharge pipe 130 and the amount of heat exchange is also high, a small amount of moisture contained in the outside air may be liquefied and dewed on the outer wall of the storage unit 110. The condensate collecting unit 160 collects all of the condensation and discharges the condensate to the outside, is installed at the lower end of the low-temperature vessel 100, because the dew formed in this way descends on the outer wall of the storage unit 110.

The outside air flowing through the outer wall of the storage unit 110 and performing heat exchange is discharged to the outside through valve control of the sixth valve 350. The outside air discharge pipe 280 is formed on one side of the heat insulating layer 120 of the low temperature vessel 100 and the outside air injected into the heat insulating layer 120 through the operation of the sixth valve 350 installed on the outside air discharge pipe 280 .

Hereinafter, the operation of raising the temperature of the cryogenic vessel 100 according to the first embodiment of the present invention will be described step by step with reference to FIG.

First, the first valve 300 is opened to discharge vaporized gas out of the liquefied gas stored in the storage unit 110 (S100). In other words, the vaporized gas flows from the storage portion 110 to the drying chamber 200 through the open gas discharge pipe 130.

After the step S100, the second valve 310 is opened to introduce the outside air into the drying chamber 200 (S200). The introduced outside air comes into contact with the surface of the gas discharge pipe 130 and is absorbed by the heat. The moisture component contained in the outside air is liquefied to form dew on the surface of the gas discharge pipe 130, and the dew drops to the bottom of the drying chamber 200.

After step S200, it is determined whether the height L of the water accumulated in the drying chamber 200 is less than a preset level (S300). Specifically, the water level measuring unit 290 for measuring the water level is installed inside the drying chamber 200 to measure the water level L of the increased drying chamber. If the measured water level L is equal to or less than a predetermined value Compare.

If the water level L of the drying chamber 200 is higher than the preset water level, the third valve 310 connected to the drain port 220 is opened to water the outside of the drying chamber 200 as a result of the comparison of step S300. The water is discharged until the water level L in the drying chamber 200 becomes equal to or less than the predetermined value and the third valve 320 is closed when the water level L is lower than the predetermined value.

After step S400, the compressor 270 installed in the outside air inlet pipe 210 of the drying chamber 200 is operated (S500). The compressor 270 is constituted by a fan having one or more blades and rotates to introduce air into the drying chamber 200 from the outside. Further, when the compressor 270 is operated, dry air in the drying chamber 200 flows along the air injection pipe 230.

After the step S500, it is determined whether the surface temperature of the storage unit 111 is equal to or greater than a predetermined value to determine opening and closing of the fourth valve 340 (S600). The temperature of the outer wall surface of the storage unit 110 is measured using the temperature measuring unit 150.

As a result of the comparison in step S600, if the temperature of the outer wall surface of the storage unit 110 is not equal to or greater than the preset value, the fourth valve 340 is opened until the abnormal value is obtained, and the outside air is injected into the heat insulating layer 120 (S700).

At this time, a condensation collecting unit 160 for separately collecting and discharging condensation generated in the outer wall of the low temperature vessel 100 is formed at the lower end of the low temperature vessel 100.

After the step S700, the sixth valve connected to the outside air discharge pipe 280 is opened 350 to discharge the outside air existing in the insulating layer 200 to the outside.

As described above, the first embodiment of the present invention can reduce the cost of the temperature raising process by raising the temperature of the cryogenic vessel 100 by injecting outside air without a drying gas or a heater, and the drying process using the cooling air of the liquefied gas The efficiency of the low temperature vessel is also improved.

FIG. 3 is a structural view of a second embodiment of a temperature raising device of a low-temperature container equipped with a temperature raising system using the outside air of the present invention, and FIG. 4 is an operation flowchart of the second embodiment of the present invention. 3, the low temperature gas flows through the first arrow 11, the flow of the outside air into the second arrow 21, the flow of heat into the third arrow 31, The flow is shown by the fourth arrow (41).

Referring to FIG. 3, the low temperature vessel 101 of the second embodiment of the present invention includes a reservoir 111 for receiving liquefied gas, a vacuum The low temperature vessel 101 and the drying chamber 201 are connected to a gas discharge pipe 131 through which the fluid can flow. Further, the gas discharge pipe 131 is provided with a first valve 301 for separating the gas discharge pipe.

The drying chamber 201 is a device for introducing outside air into the inside of the drying chamber 201 and drying the outside air into the inside of the low temperature chamber 101. The drying chamber 201 receives the outside air according to the opening and closing of the second valve 311. That is, a second valve 311 is formed in the outside air inflow pipe 211 formed in the drying chamber 201, and a second valve 311 for controlling inflow and outflow of outside air is installed in the outside air inflow pipe 211 . A drain port 221 for discharging water from the drying chamber 201 is formed and a third valve 321 capable of opening and closing the drain port 221 is provided.

When the outside air is dried, cold air of the gas contained in the storage part 111 is used instead of a separate device. More specifically, the storage unit 111 and the drying chamber 201 are connected to each other by a gas discharge pipe 131. The liquefied gas in the storage unit 111 is vaporized and moves to the drying chamber 201 along the gas discharge pipe 131 . The gas discharge pipe 131 inside the drying chamber 201 is formed not to be a straight pipe but to be curved into an 'r' character or an 'S' character.

Such a structure is intended to maximize the contact area between the outside air and the gas discharge pipe 131 to improve the heat exchange rate, and the more the heat exchange depending on the contact area, the higher the rate of drying the outside air. In the present invention, by using the cool air of the liquefied gas stored in the storage part 111, a separate dry gas is supplied from the outside, So that the cost required for the temperature raising process can be significantly reduced.

The outside air in surface contact with the gas discharge pipe 131 in the drying chamber 201 is liquefied in accordance with the heat discharge and is collected by falling down to the bottom of the drying chamber 201. The third valve 321 is opened to water the outside of the drying chamber 201 when the water level L is equal to or higher than the predetermined value by using the water level measuring unit 281 for measuring the water level L in the drying chamber 201.

The gas absorbing heat from the outside air is discharged through a gas discharge pipe 131 formed outside the drying chamber 201. The outside air which is dried by heat is discharged to the internal storage portion 111 of the low temperature vessel 101 through an air inlet pipe 231). The end of the air injection tube 231 is immersed in the liquefied gas, and the vaporization rate of the liquefied gas is raised by the injection of the dry gas.

A heater 261 is installed around the air injection pipe 231 for injecting outside air to heat the dried outside air with hot air. The heated air is discharged into the liquefied gas inside the storage part 111 along the air injection pipe 231.

The vaporized liquefied gas is discharged through the gas discharge pipe 131, and the storage unit 111 is heated to room temperature by continuous infusion of outside air. The injection of outside air is controlled by opening and closing a fifth valve 341 provided in the air injection pipe 231.

A temperature measuring unit 151 is provided on the outer wall for measuring the temperature of the storage unit 111 and a second pressure measuring unit is provided for measuring the pressure of the storage unit 111. In order to measure the pressure of the heat insulating layer 121, the first pressure measuring part is connected to the heat insulating layer 121.

Since the heat insulating layer 121 surrounding the outer wall of the storage part 111 is in a vacuum state, the condensation does not occur during the temperature raising process due to the external air injection of the storage part 111, none.

In addition, in the first embodiment, the mass flow controller is installed so as to accurately measure the drying of the outside air and inject it into the heat insulating layer. However, since the outside air is not injected into the heat insulating layer 121 in the second embodiment, .

Unlike the first embodiment, since outside air is not injected into the heat insulating layer, it is not necessary to provide a separate outside air discharge pipe, and the outside air is discharged through the gas discharge pipe 131 through which the gas is discharged.

Hereinafter, the operation of raising the temperature of the cryogenic vessel 101 according to the second embodiment of the present invention will be described step by step with reference to Fig.

First, the first valve 301 is opened to discharge the vaporized gas out of the liquefied gas contained in the storage part 111 to the outside (S101). In other words, the storage part 111 To the drying chamber 201 flows.

After the step S101, the second valve 311 is opened to introduce the outside air into the drying chamber 201 (S201). The introduced outside air contacts the surface of the gas discharge pipe 131 to transfer heat to the gas discharge pipe 131, and the moisture in the outside air is liquefied and flows to the bottom of the drying chamber 201. In other words, the moisture contained in the outside air is liquefied to form dew on the surface of the gas discharge pipe 1311, and the dew drops to the bottom of the drying chamber 201.

After step S201, it is determined whether the height L of the water accumulated in the drying chamber 201 is less than a preset value (S301). More specifically, a water level measuring unit 291 for measuring the water level is installed in the drying chamber 201 to measure the water level L of the increased drying chamber, and it is determined whether the measured water level L is equal to or less than the predetermined value do.

As a result of the comparison in the step S301, if the level L of the drying chamber 201 is higher than the preset level, the third valve 311 connected to the drain port 221 is opened and discharged outside the drying chamber 201. Water is discharged until the water level L in the drying chamber 201 becomes equal to or less than a predetermined value and the third valve 321 is closed if the water level L is lower than a predetermined value (S401).

After step S401, the compressor 271 installed in the outside air inlet pipe 211 of the drying chamber 201 is operated (S501). The compressor 271 is composed of a plurality of fans, and injects air into the drying chamber 201 from the outside in a rotating motion. In addition, the operation of the compressor 271 causes the dry air in the drying chamber 201 to flow into the storage part 111 along the air injection pipe 231. [

After step S501, the heater 261 installed around the air inlet tube 231 is operated (S601). The heated air heated by the heater 261 is moved to the storage part 111 along the air injection pipe 231.

After step S601, it is determined whether the surface temperature of the storage unit 111 is equal to or greater than a preset value, and the opening and closing of the fifth valve 341 is determined (S701). The surface temperature of the storage unit 111 is measured using a temperature measurement unit 151 provided on the outer wall of the storage unit 111 and compared with a preset temperature value.

If the temperature of the outer wall surface of the storage unit 111 is not equal to or greater than the predetermined value after step S701, the fifth valve 341 is opened until an abnormal value is obtained and the heated outdoor air is introduced into the storage unit 111 (S801).

As described above, the second embodiment of the present invention can reduce the cost of the temperature raising process by raising the temperature of the low-temperature vessel 101 by using outside air without injecting a separate drying gas, And the efficiency is also improved by performing the process.

In addition, unlike the first embodiment, the second embodiment differs from the first embodiment in that outside air is not injected into the heat insulating layer 121, so there is no need to provide a separate structure for collecting condensation or a tube and a valve for releasing the outside air. Therefore, there is a difference in that the installation structure can be simplified.

FIG. 5 is a structural view of a third embodiment of a low-temperature vessel equipped with an elevated temperature system using the outside air of the present invention, and FIG. 6 is an operational flowchart for a third embodiment of the present invention. 5, the low-temperature gas flows through the first arrow 12, the external air flows through the second arrow 22, the heat flows into the third arrow 32, The flow is shown by the fourth arrow 42.

5, the cryogenic vessel 102 of the third embodiment of the present invention includes a reservoir 112 for receiving a liquefied gas, a vacuum pump 112 formed along the outer wall of the reservoir 112 for interrupting heat exchange with outside air, The low temperature vessel 102 and the drying chamber 202 are connected to each other through a gas discharge pipe 132 through which a fluid can flow. Further, the gas discharge pipe 132 is provided with a first valve 302 that can open and close the pipe to control the gas flow.

The drying chamber 202 is a device for flowing outside air into the inside of the drying chamber 202 to dry it. The drying chamber 202 is provided with a second valve 312 through which the outside air is introduced into the drying chamber 202 through the opening and closing of the second valve 312, A drain port 322 is formed.

When the outside air is dried, cold air of the liquefied gas stored in the storage part 112 is used instead of a separate device. The storage unit 112 and the drying chamber 202 are connected to the gas discharge pipe 132 so that the vaporized liquefied gas flows along the gas discharge pipe 132. The gas discharge pipe 132 is connected to the inside of the drying chamber 202 A curved tube rather than a straight tube. That is, the gas discharge pipe 132 is formed not to be a straight pipe but to be curved into an 'r' character or an 'S' character, and performs heat exchange with the outside air flowing into the drying chamber 202. Such a curved tube structure can maximize the contact area with the outside air and increase the drying effect.

The moisture component contained in the outside air contacts the surface of the gas discharge pipe 132 and is liquefied according to heat absorption. Dew collects and falls down to the bottom of the drying chamber 202. When the water level reaches a certain level, the water is drained out of the drying chamber 202 through opening and closing of the drain port 222. At this time, the opening and closing of the drain port 222 is waterproofed under the control of the third valve 322, and the opening and closing of the third valve 322 is determined by comparing the water level L with a preset value or more.

The water level L is measured through a water level measuring unit 292 mounted inside the drying chamber 202, and the user compares the water level value with a predetermined water level value to determine opening and closing of the drain port 322.

The gas absorbing heat from the outside air is discharged along the gas discharge pipe 132 formed up to the outside of the drying chamber 202.

The outside air that has released heat flows from the drying chamber 202 to the low temperature vessel 102 through the air injection pipe 232. One air injection pipe 232 is divided into an air injection pipe 232a connected to the insulation layer 122 and an air injection pipe 232b connected to the inside of the storage unit 112. [

Flows through the air injection pipe 232a connected to the heat insulating layer 122 and flows through the air injection pipe 232b connected to the inside of the storage part 112 from the drying chamber 202. [

In this case, the air injection pipe 232a connected to the heat insulation layer 122 is provided with a fourth valve 342 to control opening and closing of the air injection pipe 232a, and an air injection pipe 232b connected to the storage unit 112, A fifth valve 342 is provided to control opening and closing of the air injection pipe 232b.

The air injection pipe 232 is provided with a heater, that is, a heater 262, to supply heat to the dried outside air. The heated dry air flows to the respective air injection pipes 232a and 232b and flows into the heat insulating layer 122 or the storage part 112 through the control of the fourth valve 342 or the fifth valve 342 do.

The air inlet tube 232a connected between the heat insulating layer 122 and the drying chamber 202 is further provided with a mass flow controller 242 for precisely measuring the dried outside air. In other words, the mass flow controller 242 measures the amount of moisture contained in the outside air passing through the air inlet tube 232a to more precisely measure the amount of dry air to inject the dry air into the heat insulating layer 122.

The pressure of the heat insulating layer 122 increases as the outside air is injected, and the first pressure measuring instrument 252 connected to the heat insulating layer 122 measures the pressure in real time.

The injected outside air flows through the outer wall of the storage part 112 in which the liquefied gas is stored in a dry state to perform heat exchange. The liquefied gas can be liquefied up to a minute amount of moisture contained in the outside air because the temperature of the liquefied gas is lower than that of the exhaust gas flowing along the gas discharge pipe 132 and the heat exchange amount is high, . Therefore, a condensation collecting portion 162 for collecting, separating and discharging condensation is additionally mounted at the lower end of the low temperature vessel 102. [

An external air discharge pipe 282 for discharging the outside air to the outside is formed after the introduced outside air is heated up in the storage part 112. A sixth valve 352 for controlling the opening and closing of the outside air discharge pipe 282 Is installed.

The opening of the air injection pipe 232b connected to the inside of the storage unit 112 from the drying chamber 202 is determined through the control of the fifth valve 342. [ The heated air flows into the liquefied gas in the storage chamber 112 along the air injection pipe 232b.

The end of the air injection pipe 232b is submerged in the liquefied gas, and the liquefied gas absorbs heat and is vaporized by the inflow of the heated air. The vaporized liquefied gas flows to the drying chamber 202 through the gas discharge pipe 132.

A second pressure measuring device 142 for measuring the pressure inside the storage part 112 is provided in the storage part 112 and a temperature measuring part 152 is provided on the wall surface Respectively. 5 shows the temperature measuring unit 152 installed in the heat insulating layer 122 which is the outer wall of the storing unit 112. However, the temperature measuring unit 152 may be provided on the inner wall of the storing unit 112 have.

Hereinafter, with reference to Fig. 6, the operation of raising the temperature of the cryogenic vessel 102 according to the third embodiment of the present invention will be described step by step.

First, the first valve 302 is opened to discharge the vaporized gas out of the liquefied gas contained in the storage part 112 to the outside (S102). That is, the vaporized gas flows from the storage portion 112 to the drying chamber 202 through the opened gas discharge pipe 132.

After step S102, the second valve 312 is opened to open the outside air inflow pipe 212 (S202). The outside air can be introduced into the drying chamber 202 through the open outside air inflow pipe 212. The moisture component contained in the outside air comes into contact with the surface of the gas discharge pipe 132 and is liquefied. Thereafter, dew is formed on the surface of the gas discharge pipe 132, and the dew drops to the bottom of the drying chamber 202.

After step S202, the water level L accumulated in the drying chamber 202 is compared with a predetermined value or less (S302). Specifically, the water level measuring unit 292 for measuring the water level is installed inside the drying chamber 202 to measure the water level L of the increased drying chamber. If the measured water level L is equal to or less than a preset value Compare.

As a result of the comparison in the step S302, if the level L of the drying chamber 202 is higher than the predetermined level, the third valve 312 connected to the drain port 222 is opened to water the outside of the drying chamber 202. Water is discharged until the water level L in the drying chamber 202 becomes equal to or lower than a preset value and the third valve 322 is closed when the water level L becomes equal to or less than the predetermined value (S402).

After step S402, the compressor 272 installed in the outside air inlet pipe 212 of the drying chamber 202 is operated (S502). The compressor 272 may be comprised of a fan with one or more vanes and causes rotational movement to move the outside air into the drying chamber 202. The outside air flows into the drying chamber 202 and the outside air flows from the drying chamber 202 to the storage portion 112 and the heat insulating layer 122 according to the operation of the compressor 272.

After step S502, the heater 262 installed around the air inlet tube 232 is operated (S602). The heated dry air due to the operation of the heater 262 flows to the heat insulating layer 122 and the storage portion 112 along the respective air injection pipes 232a and 232b.

After step S602, it is determined whether the pressure of the heat insulating layer 112 is equal to or greater than a preset value (S702). The internal pressure of the insulating layer 112 is measured in real time through the first pressure meter 252. As the outside air flows into the heat insulating layer 112 through the air injection pipe 232a, the pressure inside the heat insulating layer 112 increases. And determines whether the fourth valve 342 is opened or closed by comparing the internal pressure of the heat insulating layer 112 with a predetermined value.

As a result of the comparison in step S702, if the internal pressure of the heat insulating layer 112 is lower than the predetermined value, the fourth valve 342 is kept in the open state. If the internal pressure of the heat insulating layer 112 is equal to or higher than the predetermined value The fourth valve 343 is closed to block the inflow of outside air (S802).

After step S802, it is determined whether the surface temperature of the storage unit 112 is equal to or greater than a preset value (S902). A temperature measuring unit 152 is provided on the wall surface of the storage unit 112 to measure the surface temperature of the storage unit 112 in real time.

If the surface temperature of the storage unit 112 is less than the predetermined value as a result of the comparison in step S902, the fifth valve 342 is opened to inject the heated dry outdoor air into the liquefied gas, The fifth valve 342 is closed to block the inflow of the dry air (S1002).

After step S1002, the sixth valve 352 formed in the outside air discharge pipe 282 is opened to discharge the outside air injected into the insulating layer 112 out of the storage container 102 (S1102).

As described above, the third embodiment of the present invention can significantly reduce the cost of the temperature raising process by raising the temperature of the cryogenic vessel 102 using outside air and internal cooling air without the need to inject additional drying gas.

The third embodiment differs from the first and second embodiments in that heat is exchanged at the same time inside and outside the storage unit 112, which has a high heating effect and shortens the time required to raise the temperature.

FIG. 7 is a structural view of a fourth embodiment of a low-temperature container equipped with a temperature raising system using the outside air of the present invention, and FIG. 8 is an operation flowchart of the fourth embodiment of the present invention. 7, the flow of the liquefied gas at a low temperature is referred to as a first arrow 13, the flow of external air is referred to as a second arrow 23, the flow of heat is referred to as a third arrow 33, Is indicated by a fourth arrow (43).

Referring to FIG. 7, a fourth embodiment of the present invention relates to a special low-temperature vessel 103 storing a liquefied gas by having a structure such as a superconducting cable therein, and includes a reservoir 113 And a vacuum insulating layer 123 formed along the outer wall of the storage part 113 to block heat exchange with the outside air. The low temperature vessel 103 and the drying chamber 203 are formed of a gas discharge pipe (Not shown). In addition, the gas discharge pipe 133 is provided with a first valve 303 that can open and close the pipe to control the gas flow.

The drying chamber 203 is a device for flowing outside air into the inside of the drying chamber 203 to dry it. The drying chamber 203 is formed with a third valve 313 through which the outside air is introduced into the drying chamber 203 through the opening and closing of the second valve 313. A drain port 323 for discharging the water collected in the process of drying the outside air is formed at the lower end of the drying chamber 203.

When the outside air is dried, cold air of the liquefied gas stored in the storage part 113 is used instead of a separate device. The drying chamber 203 of the storage unit 113 is connected to the gas discharge pipe 133 so that the vaporized liquefied gas flows along the gas discharge pipe 133 and the gas discharge pipe 133 flows into the drying chamber 203 It is formed as a curved tube rather than a straight tube. That is,

The discharge pipe 133 is formed not to be a straight line but to be bent into an 'r' character or an 'S' character, and performs heat exchange with the outside air flowing into the drying chamber 203. Such a curved tube structure can maximize the contact area with the outside air and increase the drying effect.

The moisture contained in the outside air is liquefied while contacting with the surface of the gas discharge pipe 133. The water formed on the surface of the gas discharge pipe 133 falls down to the bottom of the drying chamber 203 and is discharged to the outside through the drain port 223 when reaching a certain water level. More specifically, a sensor for measuring the water level in real time in the drying chamber 203, that is, a water level measuring unit 293 is provided. When the water level L of the water accumulated in the drying chamber 203 reaches a preset value or more, And the third valve 323 provided in the second opening 223 is opened to water the outside.

The outside air flows from the drying chamber 203 along the air injection pipe 233 by the operation of the compressor 273 installed in the outside air inflow pipe 213. The air inlet pipe 233 is provided with a fifth valve 343, and the heated external air flows into the storage unit 113 depending on whether the fifth valve 343 is opened or closed. The outside air is first introduced into the storage part 112 and the liquefied gas stored in the storage part 112 is pushed out to be discharged to the outside.

The liquefied gas in the storage section 113 is discharged to the outside through the gas discharge pipe 113 by the inflow of the outside air as the compressor 273 is operated. The level measuring unit 173 measures the level of the liquefied gas in the storage unit 113 in real time and when the level of the liquefied gas is all discharged to the outside and the level is lower than a preset value, . At this time, the initial setting value is preferably a very small value and preferably set to zero.

The storage unit 113 is provided with a second pressure meter 143 for measuring the pressure in real time and a temperature measuring unit 153 for measuring the temperature of the outer wall surface of the storage unit 113. 7 shows the temperature measuring unit 153 as being installed in the heat insulating layer 123. However, the temperature measuring unit 153 may be installed on the inner wall of the storing unit 113 without being limited thereto.

The storage unit 113 is formed with an outside air discharge pipe 283 for discharging the outside air introduced into the inside thereof and the outside air discharge pipe 283 is controlled to be opened and closed by the sixth valve 353.

Hereinafter, the operation of raising the temperature of the low temperature vessel 102 according to the third embodiment of the present invention will be described step by step with reference to FIG.

First, the first valve 303 is opened to prepare to discharge the liquefied gas inside the storage part 113 to the outside (S103).

After step S103, the second valve 213 is opened to introduce the outside air into the drying chamber 203 through the outside air inlet pipe 213 (S203). The moisture of the introduced outside air is liquefied while contacting with the gas discharge pipe 110 in the drying chamber 203, and flows to the bottom of the drying chamber 203.

After the step S203, it is determined whether the height L of the water accumulated in the drying chamber 203 is equal to or less than a preset level (S303). Specifically, the water level measuring unit 293 for measuring the water level is installed in the drying chamber 203 to measure the water level L of the increased drying chamber, and it is determined whether the measured water level L is equal to or less than a predetermined value do.

As a result of the comparison in step S303, if the level L of the drying chamber 203 is higher than the predetermined level, the third valve 323 connected to the drain port 223 is opened to water the outside of the drying chamber 203. At this time, the water is discharged until the water level L in the drying chamber 203 becomes equal to or lower than the preset value, and the third valve 323 is closed when the water level L is lower than the predetermined value (S403)

After the step S403, the compressor 273 installed in the outside air inflow pipe 213 is operated (S503). The compressor 273 may be composed of a fan having one or more vanes and introduces outside air into the drying chamber 203.

After step S503, the fifth valve 343 is opened to inject external air into the storage part 113 (S603). That is, the air in the drying chamber 203 is injected into the storage portion 113 by the operation of the compressor 273.

After step S603, it is determined whether or not the level of the liquefied gas in the storage unit 113 is lower than a predetermined value (S703). The fourth embodiment differs from the first to third embodiments in that liquefied gas must first be discharged to the outside, which is performed by injecting outside air.

As a result of the comparison in the step S703, if the level of the liquefied gas in the storage unit 113 exceeds the preset value, the current state is maintained and the outside air is continuously injected. If the level of the liquefied gas is below the preset value, 303 are closed (S803).

After step S803, the heater 263 installed around the air inlet tube 233 is operated (S903). Thus, the heated air flows into the interior of the storage part 113 to heat the surface of the storage part 113.

After step S903, it is determined whether the surface temperature of the storage unit 113 is equal to or greater than a preset value (S1003). On the surface of the storage unit 113, a temperature measuring unit 153 for measuring the surface temperature in real time is attached.

If it is determined that the surface temperature of the storage unit 113 is less than the predetermined value, the heater 263 is maintained in the operating state. If the surface temperature of the storage unit 113 is equal to or higher than the predetermined value, And the operation of the compressor 273 is terminated and the sixth valve 253 is opened to exhaust the outside air in the storage part 113 (S1103).

As described above, the fourth embodiment of the present invention reduces the cost of the temperature raising process by raising the temperature of the low-temperature vessel 103 by injecting outside air without additional drying gas, and by drying the outside air using the liquefied gas cool air, It is an elevated temperature system of the improved low temperature vessel.

The fourth embodiment has a structure different from that of the first to third embodiments, but maintains the technical feature of increasing the temperature of the low-temperature vessel by utilizing outside air and converting it into dry air using the liquefied gas cool air inside.

In addition, the present invention is industrially compatible apparatus which can be used as it is in a conventional low-temperature vessel, and can significantly reduce the operating cost compared to the conventional temperature raising apparatus.

As described above, the ribbons for disassembling the coin cask screen having the reinforcement member according to the present invention are not limited to the configuration and method of the embodiments described above, but the embodiments can be variously modified All or some of the embodiments may be selectively combined.

100: low-temperature vessel 110:
120: Heat insulating layer 150: Temperature measuring part
200: drying chamber 240: mass flow controller
260: heater 270: compressor
290:

Claims (9)

A storage part (110) having therein a space capable of accommodating a fluid;
A heat insulating layer 120 formed on an outer peripheral surface of the storage part 110;
And a drying chamber 200 connected to the storage unit 110 by a gas discharge pipe 130 and connected to the insulation layer 120 by an air injection pipe 230,
Wherein the drying chamber (200) receives external air and flows the external air through the air injection pipe (230) to the heat insulating layer (120). A storage part (111) having a space capable of accommodating a fluid therein;
A heat insulating layer 121 formed on an outer circumferential surface of the storage part 111;
And a drying chamber (201) connected with the storage part (111) and the gas discharge pipe (131)
Wherein the drying chamber 201 introduces outside air and flows the outside air through the air injection pipe 231 connected to the storage part 111 to the storage part 111. [ Low temperature vessel equipped with. A reservoir 112 having therein a space for accommodating the fluid;
A heat insulating layer 122 formed on an outer circumferential surface of the storage part 112;
And a drying chamber 202 connected to the storage unit 112 by a gas discharge pipe 132 and an air injection pipe 232b and connected to the heat insulating layer 122 by an air injection pipe 232a,
Wherein the drying chamber (202) introduces outside air to flow the outside air to the heat insulating layer (122) and the storage portion (112). The method according to any one of claims 1 to 3,
And the gas discharge pipe is formed in a curved shape inside the drying chamber. The method according to any one of claims 1 to 3,
Wherein the drying chamber has a drain port formed at a lower end thereof, and the drain port is opened when the water level is equal to or higher than a preset value. The method according to any one of claims 1 to 3,
Wherein a temperature measuring unit for measuring a temperature is provided on a surface of the storage unit, and the air inlet tube is closed when the surface temperature is higher than a predetermined value. The method according to any one of claims 1 to 3,
Wherein the air inlet tube is provided with a heater around the air inlet tube. The method according to any one of claims 1 to 3,
Wherein the air inlet pipe is provided with a mass flow controller for checking the amount of water contained in the outside air. The method according to claim 1 or 3,
And a condensation collecting portion is formed at the lower end of the outer peripheral surface of the heat insulating layer.

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