JP7126024B2 - Fluid tank with internal evaporator - Google Patents

Description

TECHNICAL FIELD The present invention relates to a fluid tank having an internal evaporator, and more particularly, a liquid phase fluid stored inside a tank body is converted into a gas phase fluid by conversion means such as an evaporator provided inside the tank body. The present invention relates to a fluid tank having an internal evaporator capable of delivering converted gaseous fluid to a place of use by a delivery means, not only being excellent in space utilization, but also capable of preventing the occurrence of ultra-low temperature embrittlement.

FIG. 1 shows a conventional fluid tank 10. As shown in FIG.

Referring to FIG. 1, a conventional fluid tank 10 includes a tank body 11 in which a liquid phase fluid such as liquefied natural gas is stored.

At this time, in order to supply the gas phase fluid such as natural gas to the place of use, a delivery means 13 capable of delivering the liquid phase fluid stored inside the tank body 11 is provided, whereby the liquid phase fluid is delivered. Send outside. By heating the liquid-phase fluid sent to the outside by the evaporator 12 provided outside the tank body 11 and converting it into a gas-phase fluid, the gas-phase fluid can be supplied to the place of use.

At this time, the valves 15 and 16 before and after the evaporator 12 are closed in order to stop the operation so as not to supply the gas phase fluid to the place of use. At this time, the remaining liquid-phase fluid must be discharged to the discharge section under the control of the evaporator control valve 18 including the evaporator pressure reducing valve 18-1 or the evaporator safety valve 18-2.

In addition, since the liquid-phase fluid flows outside the tank body 11 and is converted into a gas-phase fluid by the evaporator 12, this not only may cause ultra-low-temperature embrittlement of the ultra-low-temperature liquid-phase fluid, but also A problem arises with the extra space required to provide the evaporator 12 for conversion to a fluid.

The fluid tank 20 shown in FIG. 2 was devised to solve the problem of the fluid tank 10 shown in FIG. The gas phase fluid converted by the evaporator 22 is sent to the destination of the gas phase fluid by the compressor 22-1 or the like.

However, in the case of the fluid tank 20 shown in FIG. 2, the entire liquid phase fluid inside the tank body 21 must be heated by the evaporator 22, so a large amount of energy is consumed for converting the fluid into a vapor phase fluid. There is a problem that In addition, when the operation is interrupted, the valves 25 and 26 before and after the compressor 22-1 are closed, and the remaining liquid phase fluid is released from the evaporator control valve including the evaporator pressure reducing valve 28-1 or the evaporator safety valve 28-2. 28 must be discharged to the discharge section.

In addition, since the compressor 22-1 for sending out the gas-phase fluid converted inside the tank body 21 to the place of use must be separately provided, only another space for providing the compressor 22-1 is required. However, there is a problem that maintenance costs increase due to frequent failures of the compressor 22-1.

1 and 2 are tank decompression valves 17-1 and 27-1 for controlling the pressure of the tank bodies 11 and 21 and the tank Tank control valves 17, 27 including safety valves 17-2, 27-2.

The present invention has been devised to solve the above-described problems, and the present invention provides a tank body with a liquid-phase fluid such as liquefied natural gas stored inside the tank body. It is possible to prevent the occurrence of ultra-low temperature embrittlement of liquefied natural gas by converting it into a gas phase fluid such as natural gas by a conversion means such as an evaporator, and sending the converted gas phase fluid to the place of use by a sending means. It is an object of the present invention to provide a fluid tank with an evaporator.

In addition, since the present invention does not require a control means for discharging or controlling the liquid phase fluid, the fluid having an internal evaporator can not only be excellent in space utilization, but also can reduce manufacturing costs and manufacturing time. Intended to provide a tank.

Furthermore, the present invention is configured so that the liquid-phase fluid stored inside the tank body is not affected by the conversion means provided inside the tank body, thereby converting liquid-phase fluid such as liquefied natural gas. It is an object of the present invention to provide a fluid tank having an internal evaporator capable of preventing scalding and minimizing energy consumption for maintaining it in the liquid phase.

A fluid tank having an internal evaporator according to the present invention includes a tank body 100 for storing a liquid phase fluid, a liquid phase fluid provided inside the tank body 100, and a heating medium supplied from the outside. conversion means 200 for converting the liquid phase fluid into gas phase fluid by exchanging heat with the phase fluid; and a delivery means 400 provided to deliver the phase fluid to an external destination through the vapor phase fluid piping 300 .

In addition, the vapor-phase fluid pipe 300 is characterized by including a vapor-phase fluid pipe control valve 310 capable of controlling the vapor-phase fluid flowing to the place of use.

In addition, the fluid tank 1000 further includes a pressure control unit 500 including a tank pressure reducing valve 510 and a tank safety valve 520 that can control the internal pressure of the tank body 100 .

The conversion means 200 includes a conversion means main body 210 for receiving a heating medium and converting a liquid phase fluid into a gas phase fluid, and a high-temperature heating medium pipe 220 for supplying a heating medium to the conversion means main body 210 from the outside. , a low-temperature heating medium pipe 230 through which the heating medium heat-exchanged with the liquid-phase fluid in the conversion means body 210 is discharged to the outside, and a heat insulation means provided to insulate the conversion means body 210 Characterized by

The heat insulating means may be a first heat insulating means 241 made of a heat insulating material around the outer periphery of the conversion means body 210 or a second heat insulating means 242 made of a vacuum means so as to maintain the outer periphery of the conversion means body 210 in a vacuum state. characterized by being

In addition, the converting means 200 further includes a supporter 250 detachably attached to the converting means main body 210 and fixing the converting means main body 210 inside the tank main body 100 .

In addition, the tank body 100 is characterized by including a maintenance opening 110 that can be opened and closed.

In addition, the converting means 200 further includes an exhaust gas pipe 260 capable of introducing an external gas into the high temperature heating medium pipe 220 , and the exhaust gas pipe 260 is an external gas flowing into the high temperature heating medium pipe 220 . It is characterized by including an exhaust gas control valve 261 capable of controlling the gas.

A fluid tank having an internal evaporator according to the present invention converts a liquid phase fluid such as liquefied natural gas stored inside the tank body into a gas phase fluid such as natural gas by a conversion means provided inside the tank body, By delivering the converted gas phase fluid to the place of use by the delivery means, there is an advantage that it is possible to prevent the ultra-low temperature embrittlement of the liquefied natural gas.

In addition, the fluid tank having an internal evaporator according to the present invention does not require a control means for discharging or controlling the liquid phase fluid, so it not only has excellent space utilization, but also reduces manufacturing costs and manufacturing time. has the advantage of being able to

Further, the fluid tank having an internal evaporator according to the present invention is configured so that the liquid phase fluid stored inside the tank body is not affected by the conversion means provided inside the tank body, so that the liquefied natural Advantageously, conversion of a liquid phase fluid, such as a gas, can be prevented while minimizing the expenditure of energy to maintain it in the liquid phase.

FIG. 10 is a diagram showing a conventional fluid tank; FIG. 11 is another view showing a conventional fluid tank; 1 shows a fluid tank with an internal evaporator according to a first embodiment of the invention; FIG. Fig. 3 shows another view of a fluid tank with an internal evaporator according to the first embodiment of the invention; Figure 4 shows a fluid tank with an internal evaporator according to a second embodiment of the invention; Fig. 10 is another view of a fluid tank with an internal evaporator according to the second embodiment of the invention; Fig. 3 shows a fluid tank with an internal evaporator according to a third embodiment of the invention; FIG. 8 is another view of a fluid tank with an internal evaporator according to the third embodiment of the invention;

Hereinafter, a fluid tank having an internal evaporator according to the present invention as described above will be described in detail with reference to the accompanying drawings.

<First embodiment>
FIG. 3 is a diagram showing a fluid tank having an internal evaporator according to the first embodiment of the present invention, and FIG. 4 is another diagram showing the fluid tank having an internal evaporator according to the first embodiment of the present invention.

3 and 4, a fluid tank 1000 having an internal evaporator according to the first embodiment of the present invention converts a stored liquid-phase fluid into a vapor-phase fluid and delivers the vapor-phase fluid to a destination. , which roughly includes a tank body 100, a conversion means 200, and a delivery means 400.

The tank body 100 is configured to store a liquid-phase fluid. At this time, the liquid-phase fluid stored in the tank body 100 may be liquefied natural gas (LNG). 100 must maintain cryogenic temperatures for storing liquefied natural gas.

The tank body 100 of the fluid tank 1000 having an internal evaporator according to the first embodiment of the present invention can store various liquid phase fluids that must be stored at ultra-low temperatures in addition to liquefied natural gas. Needless to say.

In addition, the tank body 100 may include an inlet (not shown) for supplying and storing the liquid phase fluid, and depending on a selected purpose, the liquid phase fluid may be discharged from the tank body 100. A discharge (not shown) may be included to allow the At this time, the inflow part is composed of a nozzle, and the liquid phase fluid is supplied to the inside of the tank body 100 in a spray method. .

The conversion means 200 is provided inside the tank body 100 and is configured to heat the liquid-phase fluid and form a gas-phase fluid by exchanging heat with the liquid-phase fluid using a heating medium supplied from the outside. .

At this time, the converting means 200 preferably comprises an evaporator for heating the liquid phase fluid and converting it to the gaseous fluid, but there are other devices that can heat the liquid phase fluid and convert it to the gaseous fluid. Needless to say, it can consist of various means.

The heating medium in the conversion means 200 consisting of an evaporator can be a means for heating the liquid phase fluid by supplying electrical energy, but the heating medium in the fluid tank 1000 with an internal evaporator according to the first embodiment of the present invention is It consists of a vapor phase heating medium means or a liquid phase heating medium means, which heats the liquid phase fluid stored inside the tank body 100 by exchanging heat with the liquid phase fluid to form the vapor phase fluid. is preferred.

The delivery means 400 supplies the liquid-phase fluid inside the tank body 100 to the conversion means 200, converts the liquid-phase fluid into gas-phase fluid by heating the liquid-phase fluid, and supplies the gas-phase fluid to the external destination ( engine, etc.).

At this time, the delivery means 400 is composed of a pump capable of supplying the liquid-phase fluid to the conversion means 200 and supplying the gas-phase fluid converted by the conversion means 200 to an external destination through the gas-phase fluid pipe 300. can be done.

As another means of the delivery means 400, the liquid phase fluid can be heated and pressurized inside the tank body 100, and can be composed of a heating pressurization device that can deliver the liquid phase fluid to the outside. Various embodiments are possible if the fluid can be supplied to the conversion means 200 and the vapor-phase fluid converted by the conversion means 200 can be delivered to an external destination through the vapor-phase fluid piping 300 .

As described above, the fluid tank 1000 having an internal evaporator according to the first embodiment of the present invention converts ultra-low temperature liquid-phase fluid into vapor-phase fluid by the conversion means 200 provided inside the tank body 100 . Since the fluid in the liquid phase state does not flow outside the tank body 100 by converting it inside and sending it to the place of use through the gas phase fluid pipe 300, it is possible to eliminate the occurrence of ultra-low temperature embrittlement due to the liquid phase. can.

Further, since the conversion means 200 for converting the liquid-phase fluid into the gas-phase fluid is located inside the tank body 100, the conversion means 200 for converting the liquid-phase fluid into the gas-phase fluid outside the tank body 100 is not provided. , which has the advantage of saving space for its provision.

Since the liquid-phase fluid is converted into the gas-phase fluid by the conversion means 200 provided inside the tank body 100, the liquid-phase fluid is converted to the gas-phase fluid in order to supply the gas-phase fluid to the user outside the tank body 100. There is no need to provide an external conversion means (evaporator) for converting into a fluid, and valves for controlling the flow of liquid-phase fluid and liquid-phase fluid measuring devices for controlling the valves can be removed. This has the advantages of not only reducing the manufacturing cost and manufacturing time of the fluid tank 1000, but also improving space utilization.

The fluid tank 1000 having the internal evaporator according to the first embodiment of the present invention uses the operation of the conversion means 200 and the delivery means 400 to supply the gas phase fluid to the place of use through the gas phase fluid pipe 300 as described above. and the vapor phase fluid line 300 may include a vapor phase fluid line control valve 310 for controlling the vapor phase fluid delivered to the point of use.

The gas-phase fluid pipe control valve 310 can be composed of various control valve means as long as it can control the gas-phase fluid flowing in the gas-phase fluid pipe 300. Therefore, without limitation, the gas-phase fluid control valve 310 can In addition to controlling the flow of the phase fluid, a sensor or the like that can measure the flow rate of the gas phase fluid may be further provided.

In addition, the fluid tank 1000 having an internal evaporator according to the first embodiment of the present invention may further include a pressure controller 500 capable of controlling the pressure inside the tank body 100. The pressure controller 500 may: It can consist of a tank pressure reducing valve 510 and a tank safety valve 520 for reducing the pressure of the tank body 100 .

The pressure control unit 500 including the tank pressure reducing valve 510 and the tank safety valve 520 can discharge the gaseous fluid inside the tank body 100 to the discharge part so as to control the pressure inside the tank body 100 . .

<Second embodiment>
FIG. 5 is a diagram showing a fluid tank having an internal evaporator according to the second embodiment of the invention, and FIG. 6 is another diagram showing the fluid tank having an internal evaporator according to the second embodiment of the invention.

Referring to FIGS. 5 and 6, the conversion means 200 of the fluid tank 1000 having an internal evaporator according to the second embodiment of the present invention exchanges heat between the supplied liquid-phase fluid and the heating medium to change into a vapor-phase fluid. high-temperature heating medium piping 220 through which a heating medium is supplied to the conversion means main body 210 from the outside; It comprises a medium pipe 230 and a heat insulating means formed to wrap around the conversion means main body 210 to insulate the inside of the conversion means main body 210 and the tank main body 100 .

More specifically, the conversion means main body 210 can be composed of an evaporator, and heat-exchanges the liquid-phase fluid with the heating medium supplied by the high-temperature heating-medium pipe 220, thereby converting the liquid-phase fluid into the gas-phase fluid. The heating medium converted to a relatively low temperature by heat exchange with the liquid phase fluid is discharged to the outside through the low temperature heating medium pipe 230 .

At this time, the high-temperature heating medium pipe 220 and the low-temperature heating medium pipe 230 may be provided independently of each other so that the heating medium flows into the converting means body 210 or is converted. The heating medium discharged from the low-temperature heating medium pipe 230 can be heated in a circulation system and flowed to the high-temperature heating medium pipe 220, so there is no limitation.

In addition, the high-temperature heating medium pipe 220 may further include a high-temperature heating medium control valve 221 for controlling the supply of the heating medium.

As described above, the conversion means main body 210 is located inside the tank main body 100, and the temperature rises due to the inflow of the heating medium, so that the influence on the liquid phase fluid stored inside the tank main body 100 is minimized. Insulation means may be provided for this purpose.

As an embodiment of the heat insulating means, as shown in FIG. 5, it may be a first heat insulating means 241 made of heat insulating material.

The first heat insulating means 241 is made of a heat insulating material, so that the heat energy generated by the heating medium in the changing means main body 210 can be prevented from being transferred to the liquid phase fluid stored inside the tank main body 100. .

At this time, the heat insulating material forming the first heat insulating means 241 may be various as long as it can prevent the thermal energy in the conversion means main body 210 from being transferred to the liquid phase fluid stored inside the tank main body 100. It goes without saying that it can consist of a heat insulating material.

As another embodiment of the heat insulating means 240, as shown in FIG. 6, it may be a second heat insulating means 242 made of a vacuum means capable of forming a vacuum on the outer peripheral surface of the conversion means main body 210. As shown in FIG.

The second heat insulating means 242 consists of vacuum means, and by maintaining the outer periphery of the conversion means main body 210 in a vacuum state, the heat energy generated by the heating medium in the conversion means main body 210 is transferred to the liquid stored inside the tank main body 100 . It can be prevented from being transmitted to the phase fluid.

Needless to say, the vacuum means forming the second heat insulating means 242 can be configured by various means such as a vacuum chamber and a vacuum heat insulating envelope.

That is, the fluid tank 1000 having the internal evaporator according to the second embodiment of the present invention includes the heat insulation means consisting of the first heat insulation means 241 or the second heat insulation means 242, so that the heat generated by the heating medium in the conversion means main body 210 Energy loss to prevent heat energy from being transferred to the liquid phase fluid so that the liquid phase fluid maintains an ultra-low temperature, prevents conversion to the gas phase, and maintains the fluid in the liquid state can be minimized.

In addition, the conversion means 200 of the fluid tank 1000 having the internal evaporator according to the second embodiment of the present invention may further include a support 250 provided to support the conversion means body 210 inside the tank body 100 . .

The shape of the support base 250 is not limited, but it can be formed so that the conversion means main body 210 can be easily fixed in position within the tank main body 100 and can be easily attached to and detached from the conversion means main body 210 for maintenance. preferable.

The tank main body 100 includes a maintenance opening 110 for detachment from the support base 250 for maintenance of the conversion means main body 210 such as an evaporator and for repair or replacement thereof.

Since the maintenance opening 110 is formed to be openable and closable, the conversion means 200 can be moved to the outside by opening, and maintenance or replacement of the conversion means 200 can be facilitated.

The shape of the maintenance opening 110 is not limited, but it goes without saying that it must be opened larger than the size of the conversion means 200 so that the conversion means 200 can be easily inserted into and pulled out of the tank body 100 . Needless to say, the tank body 100 must be formed with a structure capable of preventing leakage of the liquid-phase fluid or gas-phase fluid stored inside the tank body 100 .

<Third Embodiment>
FIG. 7 is a diagram showing a fluid tank having an internal evaporator according to the third embodiment of the invention, and FIG. 8 is another diagram showing the fluid tank having an internal evaporator according to the third embodiment of the invention.

7 and 8, the conversion means 200 of the fluid tank 1000 having an internal evaporator according to the third embodiment of the present invention includes an exhaust gas pipe 260 capable of introducing external gas into the high temperature heating medium pipe 220. further includes

That is, when the operation of the fluid tank is stopped without sending the gaseous fluid to the destination, the heating medium remains in the conversion means 200, so that the influence on the liquid fluid stored inside the tank body 100 is minimized. To do so, the heating medium must be removed.

For this purpose, the conversion means 200 of the fluid tank 1000 having an internal evaporator according to the third embodiment of the present invention includes an exhaust gas pipe 260 capable of supplying external gas to the hot heating medium pipe 220, By discharging the heating medium to the outside through the low-temperature heating medium pipe 230 using the gas supplied from the outside, the influence of the heating medium on the liquid phase fluid can be minimized.

In addition, the exhaust gas pipe 260 further includes an exhaust gas control valve 261 capable of controlling external gas flowing into the high temperature heating medium pipe 220 .

That is, the fluid tank 1000 having an internal evaporator according to the third embodiment of the present invention closes the exhaust gas control valve 261 during operation to prevent external gas from flowing into the high-temperature heating medium pipe 220. is stopped, the external gas is made to flow through the high-temperature heating medium pipe 220 and is discharged together with the heating medium through the low-temperature heating medium pipe 230, thereby quickly removing the heating medium remaining inside the conversion means main body 210. can be removed to minimize the effect on the liquid phase fluid.

1000 Fluid tank with internal evaporator 100 Tank main body 200 Conversion means 210 Conversion means main body 220 High temperature heating medium pipe 221 High temperature heating medium control valve 230 Low temperature heating medium pipe 241 First insulation means 242 Second insulation means 250 Support base 260 Exhaust gas Pipe 261 Exhaust gas control valve 300 Gas phase fluid pipe 310 Gas phase fluid pipe control valve 400 Sending means 500 Pressure control unit 510 Tank pressure reducing valve 520 Tank safety valve

Claims (7)

a tank body (100) in which a liquid phase fluid is stored;
A converting means (200) provided inside the tank body (100) to which a liquid-phase fluid is supplied, and converts the liquid-phase fluid into a gas-phase fluid by exchanging heat with a heating medium supplied from the outside with the liquid-phase fluid. When,
The liquid phase fluid inside the tank body (100) is supplied to the conversion means (200), and the gas phase fluid converted by the conversion means (200) is sent to an external destination through a gas phase fluid pipe (300). delivery means (400) arranged to deliver ,
The conversion means (200)
a conversion means body (210) for receiving a heating medium supply and converting a liquid phase fluid supplied from the inside of the tank body (100) into a gas phase fluid; A high-temperature heating medium pipe (220) to be supplied, a low-temperature heating medium pipe (230) through which the heating medium heat-exchanged with the liquid-phase fluid in the conversion means main body (210) is discharged to the outside, and the conversion means main body ( 210), the liquid phase fluid does not flow outside the tank body (100), so that it is possible to prevent the liquid phase from causing ultra-low temperature embrittlement, and the tank body ( 100) saves space for providing the means because the means for converting to gas-phase fluid can be eliminated outside of 100), and for converting liquid-phase fluid to gas-phase fluid through the adiabatic means A fluid tank having an internal evaporator capable of minimizing the effect on the liquid phase fluid stored inside said tank body (100) even when a heating medium is supplied . The gas phase fluid pipe (300) is
2. The fluid tank with internal evaporator of claim 1, including a gas phase fluid line control valve (310) capable of controlling the gas phase fluid flowing to its destination. The fluid tank (1000) is
The internal evaporator according to claim 1, further comprising a pressure control unit (500) including a tank pressure reducing valve (510) and a tank safety valve (520) capable of controlling the pressure inside the tank body (100). fluid tank with The heat insulation means
A first heat insulating means (241) made of a heat insulating material around the outer periphery of the conversion means body (210) or a second heat insulating means (242) made of a vacuum means so as to maintain the outer periphery of the conversion means body (210) in a vacuum state. A fluid tank with an internal evaporator according to claim 1, wherein: The conversion means (200)
The internal evaporation according to claim 1 , further comprising a support (250) detachably attached to the conversion means body (210) and fixing the conversion means body (210) inside the tank body (100). fluid tank with vessel The tank body (100) is
6. The fluid tank with internal evaporator according to claim 5, comprising a maintenance opening (110) provided to be openable and closable. The conversion means (200)
further comprising an exhaust gas pipe (260) for allowing external gas to flow into the high temperature heating medium pipe (220);
The internal evaporator of claim 1, wherein the exhaust gas line (260) includes an exhaust gas control valve (261) capable of controlling external gas entering the hot heating medium line (220). fluid tank.

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