JP2010018324A - Low-temperature slush-like fluid-storing and transferring device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a low-temperature slush-like fluid-storing and transferring device can transfer the low-temperature slush-like fluid of a high solidification degree without an ageing phenomenon of the low-temperature slush-like fluid stored in a vessel. <P>SOLUTION: The low-temperature slush-like fluid-storing and transferring device 1 is constructed such that the low-temperature slush-like fluid is taken out from the upper of the vessel 2 via a transfer pipe 25 extending vertically while making the low-temperature slush-like fluid S accumulated in the bottom of the vessel 2 flow laterally by a rotation of a mixing impeller 11 wherein a suction hole 7 mounted at the lower end of the transfer pipe 25 has an opening toward the bottom surface of the vessel 2, and a flange 8 mounted at the lower end of the transfer pipe 25 extends circumferentially and protrudes radially outward. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a slush-like low-temperature fluid (for example, slush hydrogen (solid hydrogen and liquid hydrogen mixed in a sherbet shape, having a higher density than liquid hydrogen and a large amount of cold). It relates to a device for storing and transporting.

As an apparatus for storing and transferring a slush-like cryogenic fluid, for example, an apparatus disclosed in Patent Document 1 is known.
JP-A-6-8263

By the way, when using a slush-like low-temperature fluid, it is desirable that the solidification rate is high from the viewpoints of using latent heat and sensible heat and improving storage density. Therefore, in the invention disclosed in Patent Document 1, a slush-like low-temperature fluid is taken out (extracted) through an extraction pipe (transfer pipe) attached to the bottom of the storage container.
However, in the one disclosed in Patent Document 1, the distance of the heat penetration heat path between the normal temperature and the low temperature (that is, the length of the transfer pipe (extraction pipe)) is shortened, and the heat of penetration into the container is increased. Aging phenomenon in slush-like low-temperature fluids (a phenomenon in which solid hydrogen in slush hydrogen partially melts due to the intrusion heat from the outside and condenses again when it condenses (Liquid -Solid mixture of hydrogen near the triple point: see Advances in cryogenic engineering Vol.11 P207))), and there is a possibility that slush-like cryogenic fluid cannot be taken out due to blockage in the transfer pipe (extraction pipe) .

Accordingly, the inventors of the present application have invented a low-temperature slush fluid storage / transfer device as shown in FIG. FIG. 8 is a schematic configuration diagram of a low temperature slush fluid storage / transfer device (hereinafter referred to as “conventional low temperature slush fluid storage / transfer device”) first invented by the inventors of the present application.
As shown in FIG. 8, the conventional low temperature slush fluid storage / transfer apparatus 100 is provided with a liquid low temperature fluid (for example, 13.8K liquid hydrogen) L and a slush low temperature fluid (for example, slush hydrogen) S. The container 2 to store is provided, and the transfer means 3 which transfers the slush-like low temperature fluid S deposited (accumulated) on the bottom part of this container 2 to another container etc. which are not shown in figure.

  The container 2 is housed in a heat insulating vacuum container 4 whose inside is evacuated and whose inner surface is provided with a radiation shield plate (not shown) such as a copper plate, for example. The heat entering from the outside to the inside of 2 is reduced.

The transfer means 3 includes a transfer tube 5 and a stirring device 6.
The transfer pipe 5 is a pipe-shaped member that extends along the vertical direction (vertical direction in FIG. 8) and that has a suction port 7 provided at the lower end thereof that opens toward the bottom surface of the container 2.

The stirring device 6 includes a drive motor 9, a drive shaft 10, and a stirring blade (for example, four paddle blades) 11.
The drive motor 9 rotates the drive shaft 10 extending from the lower end toward the bottom surface of the container 2, for example, counterclockwise when viewed from above in FIG. 8.
One end of the drive shaft 10 (the upper end in FIG. 8) is connected to one end of a rotating shaft (not shown) of the drive motor 9, and the other end (lower in FIG. 8) of the drive shaft 10. A stirring blade 11 is attached to the end portion on the side.
Further, each of the suction port 7 and the stirring blade 11 is provided at a position where the distance (height) from the bottom surface of the container 2 is substantially equal.

In addition, the codes | symbols 12 and 13 shown in FIG. 8 are a visualization apparatus and a low temperature slush-like fluid manufacturing apparatus (henceforth "manufacturing apparatus").
The visualization device 12 is a device for monitoring (observing) the flow state (mode) of the slush-like cryogenic fluid S deposited on the bottom of the container 2. Then, the inside of the container 2 can be peeked through a peeping window (not shown) attached to the upper end portion of the visualization device 12.

The manufacturing apparatus 13 includes a heat exchanger 15 having a cylindrical heat transfer surface 14 disposed in the container 2, and a solid low-temperature fluid (for example, solid hydrogen) (not shown) generated on the surface of the heat transfer surface 14. An auger (scraping means) 16 for scraping (scraping off) is provided.
Inside the heat exchanger 15, a cryogenic fluid (fluid having a lower temperature than the liquid cryogenic fluid L stored in the container 2) generated by a cryogenic fluid generator (not shown) is contained in the cryogenic fluid. It is supplied via a supply pipe 17. The cryogenic fluid supplied into the heat exchanger 15 is heat-exchanged with the liquid cryogenic fluid L stored in the container 2 to generate a solid cryogenic fluid L on the surface of the heat transfer surface 14. After that, after being stored in a storage tank (not shown) through the cryogenic fluid return pipe 18 and liquefied by a liquefaction device (not shown), the cryogenic fluid storage tank (see FIG. (Not shown).

The auger 16 is a cylindrical member that is supported by bearings (not shown) at both ends of a rotation shaft (center shaft) 19 and is rotatably accommodated along the heat transfer surface 14. A blade 20 formed in a spiral shape along the longitudinal direction is provided on the outer peripheral surface (that is, the surface facing the heat transfer surface 14).
The rotating shaft 19 and the driving shaft 22 extending downward from the driving motor 21 are connected (coupled) via a universal joint 23. When the driving motor 21 rotates, the auger 16 is rotated along with the rotation. 1 in the same manner (for example, counterclockwise when viewed from above in FIG. 1), the solid low-temperature fluid generated on the heat transfer surface 14 is scraped off by the blade 20 of the auger 16 and has a desired size. (For example, particles of solid hydrogen, for example, 1 μm to 10 μm) fall to the bottom of the container 2 to form a slush-like low-temperature fluid S.

According to such a low-temperature slush fluid storage / transfer apparatus 100, the distance of the heat intrusion heat path between the normal temperature and the low temperature (that is, the length of the transfer pipe 5) is increased, and the heat intrusion into the container 2 is increased. Decreases, and the aging phenomenon of the slush-like low-temperature fluid S is prevented.
However, the high solidification rate slush low temperature fluid S1 deposited on the bottom of the container 2 has a higher viscosity and is less likely to flow than the low solidification rate slush low temperature fluid S2 deposited thereon. Therefore, when the stirring device 6 is operated to transfer the slush-like low temperature fluid S to another container or the like (not shown), only the low solidification rate slush-like low temperature fluid S2 flows as shown in FIG. There was a problem of being transferred.

  The present invention has been made in view of the above circumstances, and a slush-like cryogenic fluid stored in a container can transport a slush-like cryogenic fluid having a high solidification rate without causing an aging phenomenon. An object of the present invention is to provide a slush fluid storage / transfer device.

The present invention employs the following means in order to solve the above problems.
The low-temperature slush fluid storage / transfer apparatus according to the present invention is configured to transfer a slush-like low-temperature fluid deposited on the bottom of a container in a horizontal direction by rotating a stirring blade, and through a transfer pipe extending along the vertical direction. A low-temperature slush fluid storage / transfer device configured to be taken out from an upper part of the container, wherein a suction port provided at a lower end of the transfer pipe opens toward a bottom surface of the container, and a lower end of the transfer pipe In addition, a ridge that extends along the circumferential direction and protrudes radially outward is provided.

According to the low temperature slush fluid storage / transfer device of the present invention, the slush low temperature fluid is taken out (transferred) through the transfer pipe, so the distance of the heat intrusion heat path between the normal temperature and the low temperature. The heat input to the container can be reduced, and the aging phenomenon of the slush-like cryogenic fluid can be prevented.
Moreover, the flow of the low-solidification rate slush-like low-temperature fluid (see FIG. 9) that tries to go around the suction port along the outer surface of the transfer pipe is prevented by the scissors provided at the lower end of the transfer pipe (see FIG. 9). Therefore, the highly solidified slush-like low temperature fluid deposited on the bottom of the container can be efficiently transferred.

  In the low-temperature slush fluid storage / transfer apparatus, a guide is provided that surrounds the outside of the tub and the stirring blade, and guides the highly solidified slush-like low-temperature fluid discharged by the stirring blade to the suction port. More preferably.

  According to such a low temperature slush fluid storage / transfer device, a high solidification rate slush fluid flowing in the lateral direction (horizontal direction) due to the rotation of the stirring blades flows along the inner wall surface of the guide. Therefore, the highly solidified slush-like low-temperature fluid deposited on the bottom of the container can be transferred more efficiently.

  In the low-temperature slush fluid storage / transfer apparatus, it is more preferable that the lower end of the transfer pipe is bent so that the suction port approaches the stirring blade and faces the stirring blade. .

  According to such a low-temperature slush fluid storage / transfer device, the suction port provided at the lower end of the transfer pipe approaches the stirring blade, and the lower end of the transfer pipe is bent so as to face the stirring blade. Therefore, a high solidification rate slush-like low-temperature fluid that flows in the lateral direction (horizontal direction) due to the rotation of the stirring blade can be guided more smoothly toward the suction port, and the high solidification rate accumulated at the bottom of the container The slush-like cryogenic fluid can be transferred more efficiently.

  In the low temperature slush fluid storage / transfer device, it is more preferable that a visualization device is provided for monitoring the flow state of the slush low temperature fluid deposited on the bottom of the container.

  According to such a low temperature slush fluid storage / transfer device, it is possible to prevent the slush fluid with a high solidification rate from flowing in the vertical direction (vertical direction) by the rotation of the stirring blade, A highly solidified slush-like cryogenic fluid deposited on the bottom can be transferred more efficiently.

  In the low-temperature slush fluid storage / transfer apparatus, it is more preferable that a reflector is attached to the bottom surface of the container.

  According to such a low temperature slush fluid storage / transfer device, not only the liquid surface state of the liquid cryogenic fluid but also the flow state (mode) of the slush cryogenic fluid deposited on the bottom of the container is monitored (observed). ) And the rotational speed of the stirring blade can be adjusted more easily.

  According to the low temperature slush fluid storage / transfer apparatus according to the present invention, the slush low temperature fluid stored in the container can transfer the slush low temperature fluid having a high solidification rate without causing an aging phenomenon. There is an effect.

Hereinafter, a first embodiment of a low temperature slush fluid storage / transfer apparatus (hereinafter referred to as “storage / transfer apparatus”) according to the present invention will be described with reference to FIG. FIG. 1 is a schematic configuration diagram of a storage / transfer apparatus according to the present embodiment.
As shown in FIG. 1, the storage / transfer apparatus 1 according to the present embodiment includes a transfer means 26 provided with a transfer pipe 25 and a stirrer 6 instead of a transfer means 3 provided with a transfer pipe 5 and a stirrer 6. It differs from the conventional storage / transfer apparatus described above in that it is equipped. Since other components are the same as those of the conventional storage / transfer apparatus described above, description of these components is omitted here.

  The transfer pipe 25 according to the present embodiment is a pipe-like member that extends along the vertical direction (vertical direction in FIG. 1), and the suction port 7 provided at the lower end thereof opens toward the bottom surface of the container 2. The lower end of the transfer pipe 25 is provided with an annular flange (baffle plate) 8 in a plan view that protrudes (expands diameter) toward the outside in the radial direction along the circumferential direction.

According to the storage / transfer apparatus 1 according to the present embodiment, the slush-like low-temperature fluid S is taken out (transferred) through the transfer pipe 25, and therefore the distance of the heat intrusion heat path between normal temperature and low temperature. The intrusion heat into the container 2 can be reduced, and the aging phenomenon of the slush-like cryogenic fluid S can be prevented.
Moreover, the flow of the low-solidification rate slush-like low-temperature fluid S2 that attempts to go around the suction port 7 along the outer surface of the transfer pipe 25 by the flange 8 provided at the lower end of the transfer pipe 25 (shown in FIG. 9). Therefore, the slush-like low temperature fluid S1 having a high solidification rate deposited on the bottom of the container 2 can be efficiently transferred.

A storage / transfer apparatus according to a second embodiment of the present invention will be described with reference to FIGS. FIG. 2 is a schematic configuration diagram of the storage / transfer apparatus according to the present embodiment, and FIG. 3 is a cross-sectional view taken along the line III-III in FIG.
As shown in FIGS. 2 and 3, the storage / transfer device 31 according to the present embodiment is different from that of the first embodiment described above in that a guide 32 is provided. Since other components are the same as those of the first embodiment described above, description of these components is omitted here.

  The guide 32 is composed of two plate-like members erected upward from the bottom surface of the container 2, and surrounds the outer side (upper side and lower side in FIG. 3) of the bowl 8 and the stirring blade 11, and the stirring blade 11. The slush-like low-temperature fluid S having a high solidification rate discharged by the gas is disposed so as to be guided to the suction port 7. Further, the guide 32 is provided such that the upper end thereof is located above the lower end of the bowl 8 and the lower end of the stirring blade 11.

According to the storage / transfer device 31 according to the present embodiment, the slush-like low-temperature fluid S <b> 1 having a high solidification rate that flows in the lateral direction (horizontal direction) by the rotation of the stirring blade 11 is sucked along the inner wall surface of the guide 32. Since it is forcibly guided toward the mouth 7, the slush-like low-temperature fluid S1 having a high solidification rate deposited on the bottom of the container 2 can be transferred more efficiently than in the first embodiment. .
Further, since the slush-like low-temperature fluid S is taken out (transferred) through the transfer pipe 25, the distance of the heat penetration heat path between the normal temperature and the low temperature can be increased, and The intrusion heat can be reduced, and the aging phenomenon of the slush-like low temperature fluid S can be prevented.

A storage / transfer apparatus according to a third embodiment of the present invention will be described with reference to FIG. FIG. 4 is a schematic configuration diagram of the storage / transfer apparatus according to the present embodiment.
As shown in FIG. 4, the storage / transfer device 41 according to the present embodiment includes a transfer means 43 provided with a transfer pipe 42 and a stirring device 6 instead of the transfer means 26 provided with the transfer tube 25 and the stirring device 6. It differs from that of the first embodiment described above in that it is provided. Since other components are the same as those of the first embodiment described above, description of these components is omitted here.

The transfer pipe 42 according to the present embodiment extends along the vertical direction (vertical direction in FIG. 4), and the suction port 7 provided at the lower end thereof approaches the stirring blade 11 and faces the stirring blade 11. The bottom end of the transfer pipe 42 is bent in the circumferential direction and protrudes (expands radially) toward the outside in the radial direction at the lower end of the transfer pipe 42. ) 8 is provided.
In addition, the suction port 7 and the bowl 8 according to the present embodiment are provided so as to be inclined with respect to the vertical plane or the horizontal plane and to face the bottom surface of the container 2.

According to the storage / transfer apparatus 41 according to the present embodiment, the suction port 7 provided at the lower end of the transfer pipe 42 approaches the stirring blade 11 and the lower end portion of the transfer pipe 42 is directed toward the stirring blade 11. Since it is bent, the slush-like low-temperature fluid S1 having a high solidification rate that flows in the lateral direction (horizontal direction) by the rotation of the stirring blade 11 can be more smoothly guided toward the suction port 7, and the container 2 The slush-like low-temperature fluid S1 having a high solidification rate deposited on the bottom of the slab can be transferred more efficiently than that of the first embodiment described above.
Further, since the slush-like low-temperature fluid S is taken out (transferred) through the transfer pipe 42, the distance of the heat penetration heat path between the normal temperature and the low temperature can be increased, and The intrusion heat can be reduced, and the aging phenomenon of the slush-like low temperature fluid S can be prevented.

In the above-described embodiment, the liquid level of the liquid low-temperature fluid L swings as much as possible while looking inside the container 2 through a viewing window (not shown) attached to the upper end of the visualization device 12. It is more preferable that the stirrer 6 is operated (more specifically, the rotation speed of the stirring blade 11 is adjusted) so as not to be disturbed (so as not to ripple).
As a result, it is possible to prevent the slush-like low-temperature fluid S1 having a high solidification rate from flowing in the vertical direction (vertical direction) due to the rotation of the stirring blade 11, and the high solidification rate slush deposited on the bottom of the container 2. Can be transferred more efficiently than the above-described embodiment.

Further, when the stirring device 6 is operated while looking through the inside of the container 2 through the viewing window attached to the upper end portion of the visualization device 12, a plurality of triangles as shown in FIG. It is more preferable that the reflecting plate 45 having a shape is radially attached (attached).
Thereby, not only the liquid surface state of the liquid low-temperature fluid L but also the flow state (state) of the slush-like low-temperature fluid S deposited on the bottom of the container 2 can be monitored (observed). 6 can be operated more easily.

  Furthermore, in the above-described embodiment, the four paddle blades have been described as a specific example of the stirring blade 11, but the stirring blade 11 is not limited to the four paddle blades, and the four blade tilts as shown in FIG. 6. It may be a paddle blade or a four-blade turbine blade with a disk as shown in FIG.

  Furthermore, in the above-described embodiment, the solid cryogenic fluid is produced by the production apparatus 13 and the slush cryogenic fluid S is formed at the bottom of the container 2. Is not an essential component. Therefore, the solid cryogenic fluid or the slush cryogenic fluid S manufactured in another place is transferred and stored in the container 2, and the high solidification rate stored in the container 2 is appropriately stored as necessary. You may make it transfer the slush-like low temperature fluid S1 to another container etc. which are not shown in figure.

1 is a schematic configuration diagram of a low-temperature slush fluid storage / transfer apparatus according to a first embodiment of the present invention. It is a schematic block diagram of the low temperature slush-like fluid storage and transfer apparatus which concerns on 2nd Embodiment of this invention. FIG. 3 is a cross-sectional view taken along the line III-III in FIG. 2. It is a schematic block diagram of the low temperature slush-like fluid storage and transfer apparatus which concerns on 3rd Embodiment of this invention. It is a figure which shows the low temperature slush-like fluid storage and transfer apparatus which concerns on other embodiment of this invention, Comprising: It is sectional drawing which looked at the bottom part of the container from upper direction. It is a figure which shows the low temperature slush-like fluid storage and transfer apparatus which concerns on another embodiment of this invention, Comprising: It is the perspective view which looked at the stirring blade from diagonally upward. It is a figure which shows the low temperature slush-like fluid storage and transfer apparatus which concerns on another embodiment of this invention, Comprising: It is the perspective view which looked at the stirring blade from diagonally upward. It is a schematic block diagram of the conventional low-temperature slush-like fluid storage / transfer apparatus. It is a figure similar to FIG. 8, Comprising: It is a figure for demonstrating the flow state of the slush-like cryogenic fluid deposited on the bottom part of the container.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Low temperature slush fluid storage and transfer device 2 Container 5 Transfer pipe 7 Suction port 8 １１ 11 Stirring blade 12 Visualization device 25 Transfer pipe 31 Low temperature slush fluid storage and transfer device 32 Guide 41 Low temperature slush fluid storage and transfer device 42 Transfer Tube 45 Reflector 100 Low temperature slush fluid storage / transfer device S Slush low temperature fluid S1 High solidification slush low temperature fluid S2 Low solidification slush low temperature fluid

Claims (5)

A low-temperature slush shape configured to take out the slush-like low-temperature fluid deposited on the bottom of the vessel from the top of the vessel through a transfer pipe extending along the vertical direction while flowing in the lateral direction by rotation of the stirring blade A fluid storage and transfer device,
A suction port provided at the lower end of the transfer pipe opens toward the bottom surface of the container, and a flange is provided at the lower end of the transfer pipe along the circumferential direction and protruding outward in the radial direction. Low temperature slush fluid storage / transfer device characterized by   2. A guide surrounding the outside of the bowl and the stirring blade and for guiding a highly solidified slush-like low-temperature fluid discharged by the stirring blade to the suction port is provided. Low temperature slush fluid storage and transfer equipment.   The low-temperature slush shape according to claim 1 or 2, wherein a lower end portion of the transfer pipe is bent so that the suction port approaches the stirring blade and faces the stirring blade. Fluid storage and transfer device.   The low-temperature slush fluid storage according to any one of claims 1 to 3, wherein a visualization device is provided for monitoring the flow state of the slush-like cryogenic fluid deposited on the bottom of the container.・ Transfer device.   The low-temperature slush fluid storage / transfer apparatus according to claim 4, wherein a reflection plate is attached to a bottom surface of the container.

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