WO2016052376A1 - Liquefied hydrogen transport system - Google Patents

Abstract

A liquefied hydrogen transport system capable of transporting a low-temperature fluid by connecting a land-side joint (5) in the tip section of a liquefied-hydrogen loading arm to a ship-side joint (7) in the manifold on the liquefied hydrogen transport ship side, the system being equipped with a cover mechanism (10) for covering at least the vicinity above both joints (5, 7) when connecting the land-side joint (5) and the ship-side joint (7) to one another, and as a result, preventing rain from falling on the joints (5, 7). Furthermore, the cover mechanism (10) is equipped with a first roof member (13) affixed to a horizontally oriented loading-arm-side pipe (11) and positioned in the vicinity above the joints (5, 7), and a second roof member (15) affixed to a horizontally oriented manifold-side pipe (12) and positioned in the vicinity above the joints (5, 7) below the first roof member (13).

Description

Liquid hydrogen transfer system

The present invention relates to a liquefied hydrogen transfer system, and is provided with a cover mechanism for covering both joints so that rainwater is not applied when connecting a land side joint at the tip of a loading arm to a ship side joint of a manifold on a liquefied hydrogen transport ship side. About.

When loading and unloading fossil fuels between transport vessels that transport fossil fuels such as crude oil, gasoline, light oil, natural gas (LNG, LPG) and storage tanks on land, a loading arm is usually used. Used. A general loading arm has a support structure as an outer riser standing on land, an inboard boom pivotally supported on the top of the outer riser, and an upper end pivoting on the upper end of the inboard boom. A freely connected outboard boom, a counterweight equipped on the lower end side of the inboard boom, and the like are provided.

As a fossil fuel transport pipe in the loading arm, an inner riser disposed in the outer riser, an inboard arm connected to the inner riser via a swivel joint and disposed in the inboard boom, an upper end of the inboard arm An outboard arm whose upper end is connected to the part via a swivel joint and supported by an outboard boom, an ERS (emergency separation system) connected to the lower end of the outboard arm via a swivel joint, It has a joint connected via a swivel joint. The fossil fuel is loaded or unloaded in a state where the land side joint is connected to the ship side joint.

Patent Document 1 discloses a liquefied gas transfer system that unloads liquefied gas from a liquefied gas transport ship to a land-based liquefied gas storage tank via a loading arm.
In a liquefied hydrogen transfer system that loads and unloads liquefied hydrogen via a loading arm between a liquefied hydrogen tank on land and a liquefied hydrogen tank on the ship side, a vacuum insulated double pipe is generally adopted as a highly insulated piping system. As the joint, for example, a joint dedicated to a vacuum heat insulating double pipe such as a bayonet joint is employed.

Utility Model Registration No. 2561667

Between the male and female joints of the bayonet joint, there is a small clearance for inserting the male joint. When connecting the bayonet joint, before inserting the male joint into the female joint, it is generally necessary to degrease and clean the surface of the male joint to remove moisture and oil.
When raindrops are attached to the male and female joints of a bayonet joint in the rain, the bayonet joint is connected to the seal due to freezing or expansion of the raindrop, causing hydrogen gas leakage, There are problems such as damage to the joint.

An object of the present invention is to provide a liquefied hydrogen transfer system that prevents rainwater from adhering to the joint when connecting or separating the joint of the liquefied hydrogen transport system.

The liquefied hydrogen transfer system of the present invention is a liquefied hydrogen transfer system in which a low temperature fluid can be transferred by connecting a land side joint at the tip of a liquid hydrogen loading arm to a ship side joint of a manifold on a liquefied hydrogen transport ship side. When connecting a joint and a ship side joint, it is the cover mechanism which covers at least the upper part vicinity of these both joints, Comprising: The cover mechanism which prevents these joints from being exposed to rain water is provided.
According to this structure, when connecting a land side joint and a ship side joint at the time of rain, both joints do not rain, Therefore The workability | operativity at the time of connecting both joints can be improved.

A first roof member fixed to a loading arm side pipe in a lateral orientation and disposed near the upper side of both joints; and a lower side of the first roof member fixed to a manifold side pipe in a lateral orientation. And a second roof member disposed in the vicinity of the upper side of both joints. According to this configuration, workability when connecting the land-side joint and the ship-side joint can be enhanced, and even when the joints are separated, the land-side joint is covered with the first roof member, and the ship-side joint is Since it is covered with two roof members, rainwater is not applied to both joints.

The cover mechanism is lower than both joints from a pair of flexible first sheet members suspended from both ends of the first roof member to a level lower than both joints, and from both ends of the second roof member. And a pair of flexible second sheet members that are suspended to a level.

According to this configuration, the pair of first sheet members can cover both side surfaces of both joints, and the pair of second sheet members can cover both side surfaces of both joints. The cover performance for covering the joint so as not to be exposed to rainwater can be further enhanced. And since the 1st, 2nd sheet | seat member is a flexible thing, the workability | operativity at the time of connecting both joints and connecting / separating does not fall.

The cover mechanism may include a circular roof member fixed to the loading arm side pipe in a standing posture. According to this structure, when connecting a land side joint and a ship side joint at the time of rain, both joints do not rain, Therefore The workability | operativity at the time of connecting both joints can be improved.

The cover mechanism may include a flexible cylindrical sheet member suspended from the outer peripheral edge of the circular roof member to a level lower than both joints. According to this structure, the cover performance which covers so that rainwater may not apply to both joints can be improved further. Moreover, since the cylindrical sheet member is flexible, workability when connecting or separating both joints is not reduced.

According to the present invention, since the rainwater is prevented from adhering to the joint when connecting or separating the joint of the liquefied hydrogen transfer system, it is possible to improve workability when connecting the land-side joint and the ship-side joint in the rain. it can.

It is explanatory drawing of the liquefied hydrogen transport ship which concerns on Example 1 of this invention, and the loading arm for liquefied hydrogen. It is a side view of the bayonet coupling and cover mechanism of a liquefied hydrogen transfer system. It is a bottom view of the bayonet coupling and cover mechanism of FIG. FIG. 4 is a sectional view taken along line IV-IV in FIG. 2. FIG. 3 is a diagram corresponding to FIG. FIG. 6 is a sectional view taken along line VI-VI in FIG. 5. It is a partial vertical side view of the bayonet joint and cover mechanism of Example 3. FIG. 8 is a sectional view taken along line VIII-VIII in FIG. 7. It is a partial vertical side view of the bayonet joint and cover mechanism of Example 4. FIG. 10 is a bottom view of the bayonet joint and cover mechanism of FIG. 9. FIG. 10 is a diagram corresponding to FIG. 9 of Example 5.

Hereinafter, modes for carrying out the present invention will be described based on examples.

As shown in FIG. 1, this liquefied hydrogen transfer system 1 unloads liquefied hydrogen from a liquefied hydrogen tank 3 of a liquefied hydrogen carrier ship 2 to an onshore liquefied hydrogen tank (not shown) or from the liquefied hydrogen tank on the ship side. This is a liquefied hydrogen transfer system for loading liquefied hydrogen into the liquefied hydrogen tank 3, and a liquefied hydrogen loading arm 4 is provided on the land side. Most of the liquefied hydrogen transfer system 1 is constituted by a vacuum heat insulating double tube.

When liquefied hydrogen is loaded or unloaded through the loading arm 4, the land-side joint 5 at the tip of the loading arm 4 is connected to the ship-side joint 7 of the manifold 6 of the liquefied hydrogen pipe of the liquefied hydrogen carrier 2 and then liquefied. Transfer hydrogen. In the case of the present embodiment, the land side joint 5 is a male joint of a bayonet joint, and the ship side joint 7 is a female joint of a bayonet joint. However, joints other than bayonet joints can be used.

When the land side joint 5 at the tip of the loading arm 4 is connected to the ship side joint 7 of the manifold 6, the loading arm 4 may be damaged if the liquefied hydrogen carrier 2 is vigorously shaken due to bad weather. The liquid hydrogen loading arm 4 is equipped with an emergency detachment system 8 (ERS).

As shown in FIGS. 2 to 4, when the land side joint 5 and the ship side joint 7 are connected, the cover mechanism 10 covers at least the vicinity of the upper side of both the joints 5, 7. A cover mechanism 10 is provided to prevent rainwater.

The cover mechanism 10 includes a flat plate-shaped first roof member 13 fixed to a loading arm side pipe 11 (land side pipe) in a lateral orientation and disposed in the vicinity of the upper sides of the joints 5 and 7, and a manifold in a lateral orientation. A flat plate-like second roof member 15 is provided which is fixed to the side pipe 12 (ship side pipe) and is disposed near the upper side of the joints 5 and 7 on the lower side of the first roof member 13. The land side joint 5 and the ship side joint 7 shown in FIGS.

The first roof member 13 is formed integrally with a substantially triangular first connecting plate 14. The first connecting plate 14 is disposed perpendicular to the axis of the pipe, the base end is joined to the land side pipe 11, and extends upward from the land side pipe 11. The first roof member 13 and the first connecting plate 14 are made of thin steel plates or stainless steel plates. The first roof member 13 is formed in a rectangular shape in plan view (long in the longitudinal direction of the pipe) that is large enough to cover the vicinity of the upper side of the land side joint 5 and the ship side joint 7 and the periphery thereof, in order to promote drainage of rainwater. The lower slope of the first roof member 13 is integrated with the upper end of the first connecting plate 14 in a downward slope toward the direction away from the land-side joint 5.

The second roof member 15 is formed integrally with the substantially triangular second connecting plate 16. The second connecting plate 16 is disposed orthogonal to the axis of the pipe, the base end is joined to the ship side pipe 12, and extends upward from the ship side pipe 12. The second roof member 15 and the second connecting plate 16 are made of thin steel plates or stainless steel plates. The second roof member 15 is disposed in the vicinity of the lower side of the first roof member 13, and the second roof member 15 is large enough to cover the upper vicinity of the land side joint 5 and the ship side joint 7 and the periphery thereof. It is formed in a rectangular shape in plan view (long in the longitudinal direction of the pipe) and has a downward slope toward the direction away from the ship side joint 7 in order to promote drainage of rainwater, and the lower end of the second roof member 15 is second. The upper end of the connecting plate 16 is integrated.

Since the cover mechanism 10 as described above is provided, when connecting the land-side joint 5 and the ship-side joint 7 in the rain, the joints 5 and 7 are not exposed to rain. Can be increased. Moreover, since the first roof member 13 is fixedly provided on the land side pipe 11 and the second roof member 15 is fixedly provided on the ship side pipe 12, the land side joint 5 and the ship side joint 7 are separated from each other before the bayonet joint is connected. Even in this state, the joints 5 and 7 do not rain. Since the side of the bayonet joint is open, workability when connecting the land-side joint 5 and the ship-side joint 7 is not reduced.

A cover mechanism 10A of the liquefied hydrogen transfer system according to the second embodiment will be described with reference to FIGS. Since this cover mechanism 10A is mostly the same as the cover mechanism 10 of the first embodiment, the same components are denoted by the same reference numerals, description thereof is omitted, and different configurations are mainly described.
The cover mechanism 10 </ b> A includes a pair of flexible first sheet members 17 that are suspended from both ends of the first roof member 13 to a level lower than the joints 5 and 7, and both ends of the second roof member 15. A pair of flexible second sheet members 18 suspended from the joints 5 and 7 to a lower level.

The first and second sheet members 17 and 18 are made of a transparent sheet material made of, for example, a synthetic resin. When the weather is not rainy, the pair of first sheet members 17 and the pair of second sheet members 18 are the first. The roof member 13 and / or the second roof member 15 can be folded back. In case of rain, work with the first and second sheet members 17 and 18 on the side where the bayonet joints are connected and disconnected are folded over the first roof member 13 and / or the second roof member 15 Can also be done.

An air curtain may be provided instead of the first and second sheet members 17 and 18. In this case, air curtain air blowing portions are disposed at both end edges of the first roof member 13, and air curtain air blowing portions are disposed at both end edges of the second roof member 15. Desirably, the dry air sent to the air curtain is air dried by the cold heat of liquefied hydrogen.
Since both sides of the bayonet joint are covered with double air curtains, rain water can be reliably prevented from entering. Pressurized air for the air curtain instead of the first seat member 17 is supplied from the air piping along the loading arm 4, and pressurized air for the air curtain instead of the second seat member 18 is supplied from the air piping on the ship side. It shall be.

A cover mechanism 10B of the liquefied hydrogen transfer system of Example 3 will be described with reference to FIGS. Since most of the cover mechanism 10B is the same as the cover mechanism 10 of the first embodiment, the same reference numerals are given to the same components and the description thereof will be omitted, and different configurations will be mainly described. In this cover mechanism 10B, the first roof member 13B is a part of a partial conical surface, and is, for example, a thin steel plate or a stainless steel plate forming a part of a partial conical surface having an opening angle of about 140 ° shown in FIG. It is configured. The upper end of the first connecting plate 14B is formed in an arc shape according to the shape of the first roof member 13B, and the lower end of the first roof member 13B is joined to the upper end of the first connecting plate 14B.

Further, the second roof member 15B is a part of a partial conical surface, for example, a thin steel plate or a stainless steel plate forming a part of the partial conical surface having an opening angle of about 140 ° shown in FIG.
The upper end of the second connecting plate 16B is formed in an arc shape according to the shape of the second roof member 15B, and the lower end of the second roof member 15B is joined to the upper end of the second connecting plate 16B. The width of the first and second roof members 13B and 15B (the width in the horizontal direction perpendicular to the axis of the pipe) is about twice the diameter of the land side joint 5 and the ship side joint 7 and is sufficiently wide. Because it is formed, it has excellent cover performance in rainy weather.

Other functions and effects similar to those of the cover mechanism 10 of the first embodiment are exhibited. As in the second embodiment, a pair of first and second sheet members may be provided, or an air curtain replacing the pair of first and second sheet members may be provided.

A cover mechanism 10C of the liquefied hydrogen transfer system of Example 4 will be described with reference to FIGS. When connecting the land side joint 5C and the ship side joint 7C, the cover mechanism 10C covers at least the vicinity of the upper side of both the joints 5C, 7C, and the cover mechanism 10C prevents the rainwater from being applied to the joints 5C, 7C. Is provided.

The cover mechanism 10C is provided with a circular roof member 20 fixed to a portion near the upper side of the land side joint 5C and the ship side joint 7C in the loading arm side pipe 11C (land side pipe) in a standing posture. The circular roof member 20 is manufactured by press-molding a thin steel plate or a stainless steel plate, and has a short inner cylindrical portion 20a fixed to the land-side pipe 11C in an outer fitting shape, and a lower end of the inner cylindrical portion 20a. Are provided with an annular flat plate portion 20b integrally formed and a short outer peripheral wall portion 20c rising from the vicinity of the outer periphery of the annular flat plate portion 20b. The annular flat plate portion 20b is provided with a drain cock 21 for discharging rainwater collected on the upper surface side of the circular roof member 20.

Since the cover mechanism 10C as described above is provided, when connecting the land-side joint 5C and the ship-side joint 7C in the rain, the joints 5C and 7C are not rained. Therefore, workability when connecting the joints 5C and 7C. Can be increased. Note that the cover mechanism 10C may be configured in a split structure that is divided into two semi-annular rings, and may be configured to be integrally fixed with screws, bolts, or the like.

A cover mechanism 10D of the liquefied hydrogen transfer system according to the fifth embodiment will be described with reference to FIG. Since most of the cover mechanism 10D is the same as the cover mechanism 10C of the fourth embodiment, the same components are denoted by the same reference numerals, description thereof is omitted, and different configurations are mainly described.
In addition to the circular roof member 20 and the drain cock 21, the cover mechanism 10 </ b> D includes a flexible cylindrical sheet member 22 that is suspended from the outer peripheral edge of the circular roof member 20 to a level lower than the joints 5 </ b> C and 7 </ b> C. Yes. The cylindrical sheet member 22 is made of a transparent sheet material made of synthetic resin, for example. In addition, it is desirable that the drain pipe of the drain cock 21 extends below the joints 5C and 7C and drains at a position below the joints 5C and 7C.

Since the cylindrical sheet member 22 is provided, the cover performance against rainwater can be further enhanced. Since the cylindrical sheet member 22 is made of a flexible transparent sheet material, workability when connecting or separating the land side joint 5C and the ship side joint 7C can be ensured. However, if necessary, the cylindrical sheet member 22 may be divided into two or three parts in the circumferential direction. A cylindrical air curtain may be provided instead of the cylindrical sheet member 22.

An example in which the embodiment is partially changed will be described.
1) Although the bayonet joint is employed in the above-described embodiment, a joint other than the bayonet joint may be employed.
2) Although the case where most of the liquefied hydrogen transfer system is constituted by a vacuum insulated double pipe has been described as an example, most of the liquefied hydrogen transfer system is constituted by a highly insulated single pipe other than the vacuum insulated double pipe. It is also possible.
3) In addition, it is needless to say that those skilled in the art can implement the invention by adding partial changes to the above-described embodiment.

The present invention provides a liquefied hydrogen transfer system that prevents rainwater from adhering to the joint when connecting or separating the joint of the liquefied hydrogen transfer system.

DESCRIPTION OF SYMBOLS 1 Liquefied hydrogen transfer system 2 Liquefied hydrogen transport ship 4 Loading arm 5 Land side joint 7 Ship side joint 10- 10D Cover mechanism 13, 15 First, second roof member 17,18 First, second sheet member 20 Circular roof member 22 Cylindrical sheet member

Claims (5)

1. In the liquefied hydrogen transfer system capable of transferring a cryogenic fluid by connecting the land side joint at the tip of the loading arm for liquefied hydrogen to the ship side joint of the manifold on the liquefied hydrogen transport ship side,
   A liquefied hydrogen transfer comprising a cover mechanism that covers at least the vicinity of the upper side of both joints when connecting the land side joint and the ship side joint, and prevents the rainwater from being applied to both the joints. system.
2. A first roof member fixed to a loading arm side pipe in a lateral orientation and disposed near the upper side of both joints; and a lower side of the first roof member fixed to a manifold side pipe in a lateral orientation. The liquefied hydrogen transfer system according to claim 1, further comprising a second roof member disposed in the vicinity of the upper side of both joints.
3. The cover mechanism is lower than both joints from a pair of flexible first sheet members suspended from both ends of the first roof member to a level lower than both joints, and from both ends of the second roof member. The liquefied hydrogen transfer system according to claim 2, further comprising: a pair of flexible second sheet members suspended to a level.
4. The liquefied hydrogen transfer system according to claim 1, wherein the cover mechanism includes a circular roof member fixed to a loading arm side pipe in an upright posture.
5. The liquefied hydrogen transfer system according to claim 4, wherein the cover mechanism comprises a flexible cylindrical sheet member suspended from the outer peripheral edge of the circular roof member to a level lower than both joints.

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