JP6950128B2 - Vaporizer - Google Patents

Description

The present invention relates to a vaporizer, and more particularly to a vaporizer capable of reducing the energy cost and installation cost for heating hot water.

Patent Document 1 describes a low-temperature layer in which a flow path into which a fluid to be heated is introduced is formed, and a high-temperature layer in which a flow path into which a heating medium for heating the medium to be heated is introduced is formed. A laminated fluid warmer made by laminating the above is disclosed.

JP-A-2017-166775

Patent Document 1 also proposes vaporizing the liquefied gas, which is the medium to be heated, by using the above-mentioned laminated fluid warmer, but the energy cost and vaporization for heating the hot water, which is the heating medium. There was room for further improvement in terms of reducing the installation cost of the vessel.

Therefore, an object of the present invention is to provide a vaporizer capable of reducing the energy cost and the installation cost for heating hot water.

Further, other problems of the present invention will be clarified by the following description.

The above problems are solved by the following inventions.

1. 1.
A liquefied gas flow path is provided on a metal plate, a liquefied gas flow path inlet communicating with one end of the liquefied gas flow path is formed at one side end of the plate, and the liquefied gas flow path is formed at the other side end of the plate. A liquefied gas plate having a liquefied gas flow path outlet that communicates with the other end of the flow path and a hot water flow path are provided on a metal plate, and one side end of the plate communicates with one end of the hot water flow path. A plate laminate formed by laminating a hot water plate having a hot water flow path inlet formed therein and a hot water flow path outlet communicating with the other end of the hot water flow path formed at the other end of the plate.
A liquefied gas inflow header that is connected to a liquefied gas inflow portion in which a plurality of liquefied gas flow path inlets are arranged in the plate laminate and distributes the liquefied gas to the plurality of liquefied gas flow path inlets.
A gas outflow header connected to a gas outflow portion where a plurality of the liquefied gas flow path outlets are arranged in the plate laminate and merging the gas from the plurality of the liquefied gas flow path outlets.
A hot water inflow header connected to a hot water inflow portion where a plurality of hot water flow path inlets are arranged in the plate laminate and distributing hot water to the plurality of hot water flow path inlets.
It is provided with a hot water outflow header connected to a hot water outflow portion in which a plurality of hot water flow path outlets are arranged in the plate laminate and for merging hot water from the plurality of hot water flow path outlets.
A vaporizer configured to vaporize the liquefied gas flowing through the liquefied gas flow path of the liquefied gas plate by the heat from the hot water flowing through the hot water flow path of the hot water plate.
The liquefied gas flow path outlet is provided on one side of the liquefied gas plate that is perpendicular to the side where the liquefied gas flow path inlet is provided and is separated by a virtual straight line passing through the liquefied gas flow path inlet. Be,
The liquefied gas flow path is a vaporizer having a detour portion that bypasses the other side separated by the virtual straight line in the path connecting the liquefied gas flow path inlet and the liquefied gas flow path outlet.
2.
The liquefied gas flow path forms a rectangular liquefied gas flow path forming region on the liquefied gas plate.
The liquefied gas flow path is formed in a zigzag shape in the liquefied gas flow path forming region.
The liquefied gas that has flowed into the liquefied gas inlet flows into the liquefied gas flow path in the liquefied gas flow path forming region from a side portion that is not a corner portion of the liquefied gas flow path forming region. The described vaporizer.

According to the present invention, it is possible to provide a vaporizer capable of reducing the energy cost and the installation cost for heating hot water.

Perspective view of the vaporizer according to the embodiment of the present invention. An exploded perspective view showing a state in which the header is removed from the plate laminate provided in the vaporizer of FIG. An exploded perspective view showing a state in which a part of the plate laminate provided in the vaporizer of FIG. 1 is disassembled. (A) is an enlarged view of the region indicated by reference numeral a in FIG. 3, and (b) is an enlarged view of the region indicated by reference numeral b in FIG. The figure explaining the liquefied gas flow path of the liquefied gas plate provided in the vaporizer of FIG. The figure explaining another example of the liquefied gas flow path of a liquefied gas plate A diagram illustrating yet another example of a liquefied gas flow path in a liquefied gas plate.

Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the drawings.

FIG. 1 is a perspective view of a vaporizer according to an embodiment of the present invention, FIG. 2 is an exploded perspective view showing a state in which a header is removed from a plate laminate provided in the vaporizer of FIG. 1, and FIG. 3 is a vaporizer of FIG. It is an exploded perspective view which shows the state which disassembled a part of the plate laminated body provided with. Further, FIG. 4A is an enlarged view of the region indicated by reference numeral a in FIG. 3, and FIG. 4B is an enlarged view of the region indicated by reference numeral b in FIG.

First, the basic configuration of the vaporizer according to the present embodiment will be described with reference to FIGS. 1 and 2.

The vaporizer is configured to vaporize the liquefied gas by the heat from the hot water in the plate laminate 1.

The plate laminate 1 is a laminate of metal plates.

The plate laminate 1 has a liquefied gas inflow portion 12 for inflowing the liquefied gas into the plate laminate 1 and a gas outflow portion 13 for flowing out the gas generated by the vaporization of the liquefied gas from the plate laminate 1. doing. In the present embodiment, the liquefied gas inflow portion 12 is arranged below the right side surface (bottom side) of the rectangular parallelepiped plate laminate 1, and the gas outflow portion 13 is arranged above the left side surface (upper surface side). A liquefied gas inflow header 2 is connected to the liquefied gas inflow section 12, and a gas outflow header 3 is connected to the gas outflow section 13.

Further, the plate laminated body 1 has a hot water inflow portion 14 for flowing hot water into the plate laminated body 1 and a hot water outflow portion 15 for flowing out hot water from the plate laminated body 1. In the present embodiment, the hot water inflow portion 14 is arranged on the upper surface of the plate laminate 1, and the hot water outflow portion 15 is arranged on the bottom surface. A hot water inflow header 4 is connected to the hot water inflow section 14, and a hot water outflow header 5 is connected to the hot water outflow section 15.

Next, the components of the plate laminate 1 will be described with reference to FIGS. 3 and 4.

The plate laminate 1 is formed by laminating a plurality of liquefied gas plates 6 and a plurality of hot water plates 7.

The liquefied gas plate 6 is a square plate made of a metal such as stainless steel.

A plurality of liquefied gas flow paths 61 for flowing liquefied gas are formed on the surface of the liquefied gas plate 6. The liquefied gas flow path 61 is composed of grooves having a semicircular cross section (shown as lines in FIG. 3), and such grooves can be formed by processing such as etching.

A plurality of liquefied gas flow paths 61 are provided so as to communicate with one end of each of the plurality of liquefied gas flow paths 61 in the liquefied gas inflow portion 12 at one side end (bottom side of the right side) of the liquefied gas plate 6. The liquefied gas flow path inlet 62 is provided so as to communicate with the other end of each of the plurality of liquefied gas flow paths 61 to the liquefied gas outflow portion 13 at the other side end (upper side side of the left side) of the liquefied gas plate 6. Up to the plurality of liquefied gas flow path outlets 63, the liquefied gas plates 6 are arranged side by side in a zigzag shape so as to go from the bottom side to the upper side while reciprocating between the right side and the left side.

The number of zigzag round trips of the liquefied gas flow path 61 is not limited to the number shown in the figure (3 round trips and a half) and can be set as appropriate. For example, it can be set in the range of 1 to 10 round trips or 1 to 10 round trips and a half. When the number of zigzag round trips is n round trips and a half (n is an integer), the liquefied gas flow path inlet 62 is arranged on one of the pair of opposite sides of the liquefied gas plate 6 as in the present embodiment. The liquefied gas flow path outlet 63 can be arranged on the other side of the pair of sides. Further, when the number of zigzag reciprocations is n reciprocations, the liquefied gas flow path inlet 62 and the liquefied gas flow path outlet 63 can be provided side by side on one side of the liquefied gas plate 6.

Since the liquefied gas flow path 61 is formed in a zigzag shape, the residence time of the liquefied gas in the plate laminate 1 becomes long, so that the liquefied gas can be sufficiently heated and vaporized. When the vaporization of the liquefied gas proceeds rapidly, the liquefied gas flow path 61 does not necessarily have to be zigzag, and may be linear, for example.

Since the liquefied gas is vaporized by the heat from the hot water in the process of flowing through the liquefied gas flow path 61, a part or all of the liquefied gas is vaporized at the liquefied gas flow path outlet 63 side in the liquefied gas flow path 61. Can be.

The hot water plate 7 is a square plate made of a metal such as stainless steel.

A plurality of hot water flow paths 71 for circulating hot water are formed on the surface of the hot water plate 7. The hot water flow path 71 is composed of grooves having a semicircular cross section (shown as lines in FIG. 3), and such grooves can be formed by processing such as etching.

The plurality of hot water flow paths 71 are provided from a plurality of hot water flow path inlets 72 provided so as to communicate with each one end of the plurality of hot water flow paths 71 in the hot water inflow portion 14 at one side end (upper side) of the hot water plate 7. , The hot water outflow portion 15 at the other end (bottom side) of the hot water plate 7 is arranged in a straight line up to the plurality of hot water flow path outlets 73 provided so as to communicate with the other ends of the plurality of hot water flow paths 71. It is installed.

Since the hot water flow path 71 is formed in a straight line, the residence time of the hot water in the plate laminate 1 is shortened, so that the hot water whose temperature has decreased due to the heating of the liquefied gas is quickly replaced with new hot water. Therefore, the heating efficiency of the liquefied gas can be improved. If the temperature drop of the hot water in the hot water flow path 71 does not pose a big problem, the hot water flow path 71 does not necessarily have to be linear, and may be, for example, zigzag.

Since the hot water is cooled by the liquefied gas in the process of flowing through the hot water flow path 71, the temperature of the hot water on the hot water flow path outlet 73 side in the hot water flow path 71 may be lower than the temperature at the hot water flow path inlet 72. ..

By stacking the liquefied gas plate 6 and the hot water plate 7, the upper portion of each groove constituting the liquefied gas flow path 61 and the hot water flow path 71 is sealed by the back surface of the plate laminated on the upper portion. As a result, each groove forms an independent flow path. In the present embodiment, the inner peripheral surfaces of the liquefied gas flow path 61 and the hot water flow path 71 after lamination are formed on a semicircular portion derived from the inner peripheral surface of the groove and the back surface of the plate laminated on the upper portion of the groove. It has a flat part from which it is derived.

The bonding method between layers (between plates) at the time of laminating is not particularly limited, and a known method can be used, and it is particularly preferable to use diffusion bonding. The method of diffusion bonding is not particularly limited, and a known method can be used. For example, a plurality of plates are brought into close contact with each other, and the temperature before the plates reach plasticity (the temperature below the melting point of the material constituting the plates). It is possible to pressurize the plates to the extent that plastic deformation does not occur as much as possible, and utilize the diffusion of atoms generated between the bonding surfaces to press-weld the plates.

In the present embodiment, the case where the plate laminate 1 is configured by repeatedly laminating a set of three layers including a hot water plate 7-liquefied gas plate 6-hot water plate 7 is shown, but the present invention is not limited to this example. The plate laminate 1 may be a stack of liquefied gas plates 6 and hot water plates 7 alternately. The plate laminate 1 may be configured by repeatedly laminating a set of two layers composed of, for example, a liquefied gas plate 6-hot water plate 7, or a hot water plate 7-liquefied gas plate 6-hot water plate 7-hot water plate 7. A set of four layers composed of the above may be repeatedly laminated to form a structure.

By stacking the plates, as shown in FIG. 4A, which is an enlarged view of the region indicated by reference numeral a in FIG. 3, a plurality of plates are formed in the liquefied gas inflow portion 12 below the right side surface (bottom side) of the plate laminate 1. A plurality of liquefied gas flow path inlets 62 included in the liquefied gas plate 6 of the above are opened. On the other hand, although not shown in an enlarged view, a plurality of liquefied gas flow path outlets 63 included in the plurality of liquefied gas plates 6 are opened in the gas outflow portion 13 above the left side surface (upper surface side) of the plate laminate 1. do.

Further, as shown in FIG. 4B, which is an enlarged view of the region indicated by reference numeral b in FIG. 3, the hot water inflow portion 14 on the upper surface of the plate laminated body 1 is provided with a plurality of hot water plates 7. A plurality of hot water flow path inlets 72 are opened. On the other hand, although not shown in an enlarged view, a plurality of hot water flow path outlets 73 included in the plurality of hot water plates 7 are opened in the hot water outflow portion 15 on the bottom surface of the plate laminate 1.

The components of the plate laminate 1 are not limited to the liquefied gas plate 6 and the hot water plate 7, and other plates can be used in combination as needed. In the present embodiment, a plurality of end plates 8 having no flow path are further laminated on one end side and the other end side in the stacking direction of the plate laminate 1. By laminating the end plates 8, for example, the strength of the plate laminate 1 can be improved.

In the present embodiment, the case where the liquefied gas flow path 61 and the hot water flow path 71 have a semicircular cross section is shown, but the present invention is not limited to this. Various shapes such as U-shape and square shape can be given to the cross section of these flow paths.

The flow path cross-sectional areas of the liquefied gas flow path 61 and the hot water flow path 71 may be equal to or different from each other, but the flow path cross-sectional area of the liquefied gas flow path 61 may be the flow path of the hot water flow path 71. By making it smaller than the cross-sectional area, the liquefied gas flowing through the liquefied gas flow path 61 can be efficiently heated.

Further, in the present embodiment, the case where the thickness of the liquefied gas plate 6 is provided to be thinner than the thickness of the hot water plate 7 is shown, but the present invention is not limited to this. The liquefied gas plate 6 may have the same thickness as the hot water plate 7, or may be provided thicker than the thickness of the hot water plate 7.

Next, the liquefied gas inflow header 2, the gas outflow header 3, the hot water inflow header 4, and the hot water outflow header 5 will be described with reference to FIGS. 1 to 4, particularly FIG.

The liquefied gas inflow header 2 has a hollow semi-cylindrical shape, and has an internal space 21 that functions as a manifold for the liquefied gas, and an inflow port 22 for inflowing the liquefied gas from the outside into the internal space 21. There is. The inflow port 22 is provided at the central portion in the longitudinal direction of the liquefied gas inflow header 2, and a pipe (not shown) for supplying the liquefied gas can be connected to the inflow port 22. With the liquefied gas inflow header 2 connected to the liquefied gas inflow portion 12 of the plate laminate 1, the plurality of liquefied gas flow path inlets 62 are opened so as to communicate with the internal space 21 of the liquefied gas inflow header 2. .. As a result, the liquefied gas inflow header 2 can distribute the liquefied gas to the plurality of liquefied gas flow path inlets 62 and allow the liquefied gas to flow in.

The gas outflow header 3 has a hollow semi-cylindrical shape, and has an internal space 31 that functions as a gas manifold, and an outflow port 32 for flowing out the gas from the internal space 31 to the outside. The outflow port 32 is provided at the central portion in the longitudinal direction of the gas outflow header 3, and a pipe (not shown) for discharging gas can be connected to the outflow port 32. With the gas outflow header 3 connected to the gas outflow portion 13 of the plate laminate 1, the plurality of liquefied gas flow path outlets 63 are opened so as to communicate with the internal space 31 of the gas outflow header 3. As a result, the gas outflow header 3 can merge and outflow the gas from the plurality of liquefied gas flow path outlets 63.

The hot water inflow header 4 has a hollow semi-cylindrical shape, and has an internal space 41 that functions as a hot water manifold, and an inflow port 42 for flowing hot water from the outside into the internal space 41. The inflow port 42 is provided at the central portion in the longitudinal direction of the hot water inflow header 4, and a pipe (not shown) for supplying hot water can be connected to the inflow port 42. With the hot water inflow header 4 connected to the hot water inflow portion 14 of the plate laminate 1, the plurality of hot water flow path inlets 72 are opened so as to communicate with the internal space of the hot water inflow header 4. As a result, the hot water inflow header 4 can distribute and flow hot water into the plurality of hot water flow path inlets 72.

The hot water outflow header 5 has a hollow semi-cylindrical shape, and has an internal space 51 that functions as a hot water manifold, and an outflow port 52 for flowing out hot water from the internal space 51 to the outside. The outlet 52 is provided at the center of the hot water outflow header 5 in the longitudinal direction, and a pipe (not shown) for discharging hot water can be connected to the outlet 52. With the hot water outflow header 5 connected to the hot water outflow portion 15 of the plate laminate 1, the plurality of hot water flow path outlets 73 are opened so as to communicate with the internal space of the hot water outflow header 5. As a result, the hot water outflow header 5 can merge and flow out hot water from a plurality of hot water flow path outlets 73.

The liquefied gas inflow header 2, the gas outflow header 3, the hot water inflow header 4, and the hot water outflow header 5 can be made of a metal such as stainless steel. These headers can be fixed to the plate laminate 1 by, for example, welding.

Next, an example of a method of vaporizing the liquefied gas using a vaporizer having the above configuration will be described.

When vaporizing the liquefied gas, first, the liquefied gas stored in a tank (for example, an LNG tank) (not shown) is supplied to the liquefied gas inflow header 2 by a pump (not shown). On the other hand, hot water from a hot water generator (not shown) is supplied to the hot water inflow header 4 by a pump (not shown).

The liquefied gas supplied to the liquefied gas inflow header 2 flows into the liquefied gas flow path 61 from the liquefied gas flow path inlet 62 opened in the liquefied gas inflow portion 12 of the plate laminate 1. On the other hand, the hot water supplied to the hot water inflow header 4 flows into the hot water flow path 71 from the hot water flow path inlet 72 that opens in the hot water inflow portion 14 of the plate laminate 1.

As a result, heat exchange occurs between the liquefied gas in the liquefied gas flow path 61 and the hot water in the hot water flow path 71 via the layer (plate) in the plate laminate 1, and the liquefied gas is vaporized by the heat from the hot water. Will be done.

The gas generated by the vaporization of the liquefied gas flows out to the gas outflow header 3 from the liquefied gas flow path outlet 63 that opens in the gas outflow portion 13 of the plate laminate 1. The gas from the gas outflow header 3 can be supplied to a gas combustion device such as a gas engine, for example. On the other hand, the hot water after the heat exchange flows out to the hot water outflow header 5 from the hot water flow path outlet 73 that opens in the hot water outflow portion 15 of the plate laminate 1. The hot water from the hot water outflow header 5 can be returned to, for example, a hot water generator, reheated, and then resupplied to the hot water inflow header 4.

Next, with reference to FIG. 5A, the path of the liquefied gas inflow header 2 and the liquefied gas flow path 61 provided in the liquefied gas plate 6 will be further described.

The broken line indicated by V in FIG. 5A indicates a virtual straight line perpendicular to the side of the liquefied gas plate 6 where the liquefied gas flow path inlet 62 is provided and passing through the liquefied gas flow path inlet 62. ing.

The liquefied gas flow path outlet 63 is provided on one side (upper side in the illustrated example) separated by a virtual straight line V.

In the present embodiment, the liquefied gas flow path 61 first extends vertically into the liquefied gas plate 6 from the side where the liquefied gas flow path inlet 62 is provided when viewed along the flow direction of the liquefied gas. After changing the course to the other side separated by the virtual straight line V, it extends in a zigzag shape from the other side toward one side (from the lower side to the upper side in the illustrated example) so as to exceed the virtual straight line V. Finally, it reaches the liquefied gas flow path outlet 63. That is, the liquefied gas flow path 61 has a detour portion 64 that bypasses the other side separated by a virtual straight line V in the path connecting the liquefied gas flow path inlet 62 and the liquefied gas flow path outlet 63.

The significance of the detour portion 64 will be described below. First, the liquefied gas plate 6 is joined with a liquefied gas inflow header 2 for supplying the liquefied gas to the liquefied gas flow path inlet 62. The liquefied gas inflow header 2 has one side and the other side (in the illustrated example) separated by the above-mentioned virtual straight line V so as to communicate the liquefied gas flow path inlet 62 with the internal space 21 of the liquefied gas inflow header 2. It is joined to the liquefied gas plate 6 at each joint portion 23 (upper side and lower side).

Since the wall surface of the liquefied gas inflow header 2 is formed to be thick enough to withstand the pressure of the liquefied gas, the width of the joint 23 (the liquefied gas flow path inlet 62 in the liquefied gas plate 6 is provided). The width along the side) is large. As the width of the joint 23 increases, the region β on the other side separated by the virtual straight line V must be formed larger.

At this time, as shown in the comparative example of FIG. 5B, when the liquefied gas flow path 61 does not have the bypass portion 64, the liquefied gas flow path 61 is in the other side region β separated by the virtual straight line V. Cannot be formed, and the region β cannot be effectively used.

On the other hand, as shown in FIG. 5A, when the liquefied gas flow path 61 has a bypass portion 64, the liquefied gas flow path is within the region β on the other side separated by the virtual straight line V. 61 can be formed. As a result, the length of the liquefied gas flow path 61 can be extended in comparison with the above-mentioned comparative example, and as a result, a residence time for sufficiently vaporizing the liquefied gas can be secured. As a result, vaporization of the liquefied gas can be achieved by securing the residence time even when hot water having a relatively low temperature is used, as compared with the case where the bypass portion 64 is not provided, and the energy cost for heating the hot water is reduced. The effect of For example, when a vaporizer is installed on a ship such as an LNG carrier, the energy that can be used is limited, so that it is particularly significant that the energy cost can be reduced.

Further, when the liquefied gas flow path 61 has a bypass portion 64, the entire liquefied gas flow path 61 can be moved (shifted) to the end of the liquefied gas plate 6, so that the liquefied gas flow path 61 is liquefied as shown in the example of FIG. It is also possible to reduce the area of the gas plate. That is, in the example of FIG. 6, the flow path length of the liquefied gas flow path 61 is about the same as that of the comparative example of FIG. 5 (b), but the area of the liquefied gas plate 6 is larger than that of the comparative example of FIG. 5 (b). It's getting smaller. As a result, the size of the entire plate laminate 1 and the vaporizer can be reduced, and the effect of reducing the installation cost can be obtained. As the installation cost, for example, the installation space and the cost of the installation work can be reduced. Further, the miniaturization of the vaporizer makes it possible to suitably support the installation in a limited space in a ship such as an LNG carrier.

By designing the liquefied gas flow path 61, one or both of the extension of the flow path length of the liquefied gas flow path 61 (reduction of energy cost) and the offsetting of the entire liquefied gas flow path 61 (reduction of installation cost) should be realized. Can be done.

In the present embodiment, the liquefied gas flow path 61 forms a rectangular liquefied gas flow path forming region α on the liquefied gas plate 6. The liquefied gas flow path 61 is formed in a zigzag shape in the liquefied gas flow path formation region α.

The liquefied gas that has flowed into the liquefied gas inlet 62 flows into the liquefied gas flow path 61 in the liquefied gas flow path forming region α from a side portion that is not a corner portion of the liquefied gas flow path forming region α. Thereby, the above-mentioned detour portion 64 can be preferably formed.

In the above description, the case where the liquefied gas flow path 61 is provided with the detour portion 64 on the other side of the virtual straight line V passing through the liquefied gas inlet 62 has been described. However, as shown in FIG. 7, the liquefied gas outlet 63 A similar detour portion 65 can be provided on the other side of the virtual straight line V'passing through.

That is, the alternate long and short dash line indicated by V'in the example of FIG. 7 is virtual perpendicular to the side of the liquefied gas plate 6 where the liquefied gas flow path outlet 63 is provided and passes through the liquefied gas flow path outlet 63. A straight line V'is shown.

The liquefied gas flow path outlet 62 is provided on one side (lower side in the illustrated example) separated by a virtual straight line V'.

In the example of FIG. 7, when the liquefied gas flow path 61 is viewed along the direction opposite to the flow direction of the liquefied gas, first, the inside of the liquefied gas plate 6 is perpendicular to the side where the liquefied gas flow path outlet 63 is provided. Then, after changing the course to the other side separated by the virtual straight line V', cross the virtual straight line V'from the other side to one side (from the upper side to the lower side in the illustrated example). It extends in a zigzag shape and finally reaches the liquefied gas flow path inlet 62. That is, the liquefied gas flow path 61 has a detour portion 65 that bypasses the other side separated by a virtual straight line V'in the path connecting the liquefied gas flow path outlet 63 and the liquefied gas flow path inlet 62.

The detour portion 65 can also exert the same effect as the detour portion 64 described above. In the example of FIG. 7, by providing these two bypass portions 64 and 65, the length of the liquefied gas flow path 61 is extended and the liquefied gas flow path is compared with the comparative example of FIG. 5 (b). The edge alignment of the entire 61 is preferably compatible.

Further, as shown in FIG. 7, the detour portion 65 can form the liquefied gas flow path 61 even in the region β'on the other side separated by the virtual straight line V'.

Further, the above-mentioned bypass portion 65 can be suitably formed by causing the liquefied gas to flow out from the side portion of the rectangular liquefied gas flow path forming region α that is not a corner portion toward the liquefied gas flow path outlet 63. can.

〔others〕
In the above description, the liquefied gas inflow portion is arranged below the right side surface of the rectangular parallelepiped plate laminate, the gas outflow portion is arranged above the left side surface (upper surface side), and the hot water inflow portion is arranged on the upper surface. The case where the hot water outflow portion is arranged on the bottom surface is shown, but the present invention is not limited to this. The liquefied gas inflow section, the gas outflow section, the hot water inflow section, and the hot water outflow section may be provided on any surface of the plate laminate. It is preferable that the liquefied gas inflow portion and the gas outflow portion are provided on a pair of surfaces facing each other in the rectangular parallelepiped plate laminate, and the hot water inflow portion and the hot water outflow portion are provided with each other in the rectangular parallelepiped plate laminate. It is provided on another set of facing surfaces.

Further, the liquefied gas inflow section, the gas outflow section, the hot water inflow section, and the hot water outflow section do not necessarily have to be provided on different surfaces of the plate laminate. Two or more of the liquefied gas inflow part, the gas outflow part, the hot water inflow part, and the hot water outflow part may be arranged side by side on the same surface in the plate laminate.

Further, the path of the liquefied gas flow path formed in the liquefied gas plate is not limited to the path shown in the above-described embodiment. The liquefied gas flow path is provided at any part of the periphery of the liquefied gas plate (the part corresponding to the inflow portion of the liquefied gas), and the inlet of the liquefied gas flow path and any other part of the periphery of the liquefied gas plate. Any route can be provided as long as it connects to the liquefied gas flow path outlet provided at the portion (the portion corresponding to the gas outflow portion). Similarly, the path of the hot water flow path formed in the hot water plate is not limited to the path shown in the above-described embodiment. The hot water flow path includes a hot water flow path inlet provided at any part of the peripheral edge of the hot water plate (a part corresponding to the hot water inflow part) and any other part of the peripheral edge of the hot water plate (at the hot water outflow part). Any route can be provided as long as it connects to the hot water flow path outlet provided at the corresponding portion).

The number of liquefied gas flow paths formed in one liquefied gas plate is not limited to a plurality, and may be one. Further, the number of hot water flow paths formed in one hot water plate is not limited to a plurality, and may be one.

The liquefied gas vaporized by the vaporizer is not particularly limited, and examples thereof include liquefied natural gas (LNG), liquefied nitrogen, and liquefied hydrogen. The temperature of the liquefied gas at the time of inflow into the plate laminate 1 is not particularly limited, and in the case of LNG, it can be, for example, about -162 ° C.

The hot water used for heating the liquefied gas is not particularly limited as long as the temperature at the inlet of the hot water flow path is higher than that of the liquefied gas at the inlet of the liquefied gas flow path. It is preferably water. When vaporizing LNG, the temperature of hot water can be, for example, about 50 ° C.

The vaporizer can be used for various purposes of vaporizing liquefied gas, and can be preferably mounted on, for example, an LNG carrier. By mounting the vaporizer on the LNG carrier, the low-temperature LNG stored in the LNG tank can be efficiently vaporized by the vaporizer. The natural gas vaporized by the vaporizer can be used as fuel for the gas engine mounted on the LNG carrier. Even if the LNG is at a low temperature, the vaporizer is prevented from being deformed and damaged due to thermal stress, and can be operated stably. When the vaporizer is mounted on an LNG carrier, the waste heat of the exhaust gas of the gas engine may be used for heating hot water. The hot water may be water previously loaded on the ship or seawater.

1: Plate laminate 12: Liquefied gas inflow part 13: Gas outflow part 14: Hot water inflow part 15: Hot water outflow part 2: Liquefied gas inflow header 21: Internal space 22: Inflow port 23: Joint part 3: Gas outflow header 31 : Internal space 32: Outlet 4: Hot water inflow header 41: Internal space 42: Inflow port 5: Hot water outflow header 51: Internal space 52: Outlet 6: Liquefied gas plate 61: Liquefied gas flow path 62: Liquefied gas flow path Inlet 63: Liquefied gas flow path outlet 64, 65: Bypass 7: Hot water plate 71: Hot water flow path 72: Hot water flow path inlet 73: Hot water flow path outlet 8: End plate V, V': Virtual straight line α: Liquefied gas flow path forming region β: other side region separated by a virtual straight line V β': other side region separated by a virtual straight line V'

Claims (3)

Provided with a liquefied gas flow path on a plate of metal square shape, liquefied gas flow path inlet communicating with one end of the liquefied gas flow path is formed on the bottom side of one side of the plate, the other side of the plate of the upper side the liquefied gas flow path side liquefied gas plate liquefied gas flow path outlet communicating is formed on the other of, provided with a hot water flow path on a plate of metal square shape, the upper side of the plate the hot-water inlets communicating with one end of the hot water flow path is formed, it is constituted by laminating a hot plate heated flow path outlet is formed communicating with the other end of the hot water flow passage at the bottom of the plate Plate laminate and
A liquefied gas inflow header that is connected to a liquefied gas inflow portion in which a plurality of liquefied gas flow path inlets are arranged in the plate laminate and distributes the liquefied gas to the plurality of liquefied gas flow path inlets.
A gas outflow header connected to a gas outflow portion where a plurality of the liquefied gas flow path outlets are arranged in the plate laminate and merging the gas from the plurality of the liquefied gas flow path outlets.
A hot water inflow header connected to a hot water inflow portion where a plurality of hot water flow path inlets are arranged in the plate laminate and distributing hot water to the plurality of hot water flow path inlets.
It is provided with a hot water outflow header connected to a hot water outflow portion in which a plurality of hot water flow path outlets are arranged in the plate laminate and for merging hot water from the plurality of hot water flow path outlets.
The liquefied gas is LNG and
A vaporizer configured to vaporize the liquefied gas flowing through the liquefied gas flow path of the liquefied gas plate by the heat from the hot water flowing through the hot water flow path of the hot water plate.
The liquefied gas flow path forms a rectangular liquefied gas flow path forming region on the liquefied gas plate, is formed in a zigzag shape in the liquefied gas flow path forming region, and the liquefied gas flow. than road entrance have a detour to bypass the bottom side of the plate, and characterized that you have been bent at a right angle form at the point immediately after the said liquefied gas flow path inlet enters the liquefied gas flow channel forming region Vaporizer. The vaporizer according to claim 1, wherein the liquefied gas flow path has a detour portion that bypasses the upper side of the plate with respect to the outlet of the liquefied gas flow path. Liquefied gas flowing into the front SL liquefied gas flow path inlet, and characterized in that flowing into the liquefied gas flow path of the liquefied gas flow path formation region from the side portion is not a corner of the liquefied gas flow channel forming region The vaporizer according to claim 1 or 2.

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