JP2020012490A - Vaporizer - Google Patents

Abstract

To provide a vaporizer capable of reducing energy costs and installation costs for warming hot water.SOLUTION: The vaporizer comprises a plate laminate body constituted by laminating a liquified gas plate 6, on which a liquefied gas passage 61, a liquified gas passage inlet 62 and a liquified gas passage outlet 63 are formed, and a hot water plate, on which a hot water passage is formed. The vaporizer vaporizes liquified gas flowing through the liquified gas passage 61 by heat from hot water flowing through the hot water passage. The liquified gas passage outlet 63 is provided on one side blocked by a virtual straight line V vertical to a side of the liquified gas plate 6 on which the liquified gas passage inlet 62 is provided, and blocked by a virtual straight line V passing through the liquified gas passage inlet 62. The liquified gas passage 61 has a bypass part 64 bypassing the other side blocked by a straight line V on a passage coupling the liquified gas passage inlet 62 and the liquified gas passage outlet 63.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a vaporizer, and more particularly, to a vaporizer that can reduce energy costs and installation costs for heating hot water.

  Patent Document 1 discloses a low-temperature layer in which a flow path into which a medium to be heated is introduced and a high-temperature layer in which a flow path into which a heating medium for heating the medium to be heated is formed are formed. Are disclosed.

JP 2017-166775 A

  Patent Document 1 also proposes to vaporize a liquefied gas as a medium to be heated by using the above-mentioned laminated fluid warmer, but the energy cost and vaporization for heating the warm water as a heating medium are also proposed. There is 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 that can reduce energy cost and installation cost for heating hot water.

  Further, other objects of the present invention will become apparent from the following description.

  The above object is achieved by the following inventions.

1.
A liquefied gas channel is provided on a metal plate, and a liquefied gas channel inlet communicating with one end of the liquefied gas channel is formed at one end of the plate, and the liquefied gas channel is formed at the other end of the plate. A liquefied gas plate formed with a liquefied gas flow path outlet communicating with the other end of the flow path, a hot water flow path provided on a metal plate, and one end of the plate communicated with one end of the hot water flow path A hot water flow path inlet is formed, and a plate laminated body formed by stacking a hot water plate formed with a hot water flow path outlet communicating with the other end of the hot water flow path at the other end of the plate,
A liquefied gas inflow header that is connected to a liquefied gas inflow portion where the plurality of liquefied gas flow channel inlets in the plate laminate are arranged, and distributes liquefied gas to the plurality of liquefied gas flow channel inlets,
A gas outflow header that is connected to a gas outlet where the plurality of liquefied gas passage outlets in the plate laminate are arranged, and merges the gas from the plurality of liquefied gas passage outlets,
A hot water inflow header that is connected to the hot water inflow section where the plurality of hot water flow path inlets in the plate laminate are arranged and distributes hot water to the plurality of hot water flow path inlets;
A hot water outflow header that is connected to the hot water outflow section where the plurality of hot water flow path outlets in the plate laminate are arranged, and that joins hot water from the plurality of hot water flow path outlets;
A vaporizer configured to vaporize a liquefied gas flowing through the liquefied gas flow path of the liquefied gas plate by heat from 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 a 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. And
The liquefied gas flow path further includes a bypass portion that bypasses the other side divided by the virtual straight line in a 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 area,
The liquefied gas flowing into the liquefied gas inlet flows into the liquefied gas flow channel in the liquefied gas flow channel formation region from a side portion other than a corner of the liquefied gas flow channel formation region. The vaporizer as described.

  ADVANTAGE OF THE INVENTION According to this invention, the vaporizer which can reduce the energy cost for warming warm water and installation cost can be provided.

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 included in the vaporizer of FIG. 1. FIG. 2 is an exploded perspective view showing a state in which a part of a plate laminate included in the vaporizer of FIG. 1 is disassembled. FIG. 3A is an enlarged view of a region indicated by reference numeral a in FIG. 3, and FIG. 3B is an enlarged view of a region indicated by reference numeral b in FIG. The figure explaining the liquefied gas flow path of the liquefied gas plate with which the vaporizer of Drawing 1 is provided. The figure explaining other examples of the liquefied gas flow path of the liquefied gas plate The figure explaining the further another example of the liquefied gas flow path of 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 where a header is removed from a plate laminate provided in the vaporizer of FIG. 1, and FIG. 3 is a vaporizer of FIG. FIG. 3 is an exploded perspective view showing a state in which a part of a plate laminate provided in the apparatus is disassembled. FIG. 4A is an enlarged view of an area indicated by reference numeral a in FIG. 3, and FIG. 4B is an enlarged view of an area indicated by reference numeral b in FIG.

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

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

  The plate laminate 1 is a laminate of metal plates.

  The plate laminate 1 has a liquefied gas inlet 12 for flowing liquefied gas into the plate laminate 1 and a gas outlet 13 for flowing gas generated by vaporization of the liquefied gas from the plate laminate 1. are doing. In the present embodiment, the liquefied gas inflow section 12 is disposed below the right side (bottom side) of the rectangular parallelepiped plate laminate 1, and the gas outflow section 13 is disposed above the left side (top side). The liquefied gas inflow section 12 is connected to the liquefied gas inflow header 2, and the gas outflow section 13 is connected to the gas outflow header 3.

  Further, the plate laminate 1 has a hot water inflow portion 14 for flowing hot water into the plate laminate 1 and a hot water outflow portion 15 for flowing hot water from the plate laminate 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. The hot water inflow header 14 is connected to the hot water inflow header 14, and the hot water outflow header 15 is connected to the hot water outflow header 5.

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

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

  The liquefied gas plate 6 is a rectangular plate made of metal such as stainless steel, for example.

  On the surface of the liquefied gas plate 6, a plurality of liquefied gas channels 61 for flowing the liquefied gas are formed. The liquefied gas channel 61 is formed by a groove having a semicircular cross section (shown as a line in FIG. 3), and such a groove can be formed by processing such as etching.

  The plurality of liquefied gas channels 61 are provided in the liquefied gas inflow portion 12 at one end (the bottom side on the right side) of the liquefied gas plate 6 so as to communicate with one end of each of the plurality of liquefied gas channels 61. From the liquefied gas channel inlet 62 to the liquefied gas outlet 13 at the other end (upper left side) of the liquefied gas plate 6 so as to communicate with the other end of each of the plurality of liquefied gas channels 61. The plurality of liquefied gas flow path outlets 63 are arranged in a zigzag manner from the bottom side to the upper side while reciprocating between the right side and the left side of the liquefied gas plate 6.

  The number of zigzag reciprocations in the liquefied gas flow channel 61 is not limited to the number of times shown (three and a half reciprocations), and can be set as appropriate. When the number of zigzag reciprocations is n and a half (n is an integer), as in the present embodiment, the liquefied gas channel inlet 62 is disposed on one of a pair of opposing sides of the liquefied gas plate 6, The liquefied gas channel outlet 63 can be arranged on the other side of the pair of sides. When the number of zigzag reciprocations is n, the liquefied gas flow path inlet 62 and the liquefied gas flow path outlet 63 can be provided on one side of the liquefied gas plate 6.

  Since the liquefied gas channel 61 is formed in a zigzag shape, the residence time of the liquefied gas in the plate laminate 1 is prolonged, so that the liquefied gas can be sufficiently heated and vaporized. In the case where the vaporization of the liquefied gas proceeds quickly, the liquefied gas channel 61 does not necessarily have to be in a zigzag shape, and may be in a linear shape, for example.

  Since the liquefied gas is vaporized by heat from warm water in the course of flowing through the liquefied gas flow channel 61, the liquefied gas is partially or entirely vaporized at the liquefied gas flow channel outlet 63 side in the liquefied gas flow channel 61. Can be

  The hot water plate 7 is a rectangular plate made of metal such as stainless steel, for example.

  A plurality of hot water flow paths 71 for flowing hot water are formed on the surface of the hot water plate 7. The hot water flow path 71 is configured by a groove (shown as a line in FIG. 3) having a semicircular cross section, and such a groove 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 at one end (upper side) of the hot water plate 7 so as to communicate with one end of each of the plurality of hot water flow paths 71. A plurality of hot water flow path outlets 73 provided in the hot water outflow portion 15 at the other end (bottom side) of the hot water plate 7 so as to communicate with the other ends of the plurality of hot water flow paths 71. Has been established.

  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. Therefore, the hot water whose temperature has decreased due to the heating of the liquefied gas is quickly replaced with new hot water. As a result, the heating efficiency of the liquefied gas can be increased. When the temperature drop of the hot water in the hot water flow path 71 does not cause a serious 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 course of flowing through the hot water flow path 71, the temperature of the hot water at the hot water flow path outlet 73 side of the hot water flow path 71 may be lower than the temperature at the hot water flow path inlet 72. .

  By laminating the liquefied gas plate 6 and the hot water plate 7, the upper portions of the grooves forming the liquefied gas flow channel 61 and the hot water flow channel 71 are sealed by the back surface of the plate laminated on the upper portions. Thereby, each groove forms an independent flow path. In the present embodiment, the inner peripheral surfaces of the liquefied gas flow channel 61 and the hot water flow channel 71 after lamination have a semicircular portion derived from the inner peripheral surface of the groove and a back surface of the plate laminated on the upper portion of the groove. And a flat portion derived therefrom.

  The method of bonding between layers (between plates) at the time of lamination 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 a temperature before the plates reach plasticity (a temperature lower than the melting point of the material forming the plates). , And pressurized so as not to cause plastic deformation as much as possible, and the plates can be pressed against each other by utilizing the diffusion of atoms generated between the joining surfaces.

  In the present embodiment, a case is shown in which the plate laminate 1 is configured by repeatedly laminating a set of three layers including a hot water plate 7, a liquefied gas plate 6, and a hot water plate 7, but is not limited to this example. The plate laminate 1 may be any one in which the liquefied gas plate 6 and the hot water plate 7 are alternately laminated. The plate laminate 1 may be configured by repeatedly laminating a set of two layers including, for example, a liquefied gas plate 6-a hot water plate 7, or a hot water plate 7-a liquefied gas plate 6-a hot water plate 7-a hot water plate 7. May be configured by repeatedly laminating a set of four layers consisting of

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

  Further, due to the lamination of the plates, a plurality of hot water plates 7 are provided in the hot water inflow portion 14 on the upper surface of the plate laminate 1 as shown in FIG. A plurality of hot water flow path inlets 72 open. On the other hand, although not shown in an enlarged view, a plurality of hot water flow path outlets 73 provided 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 only the liquefied gas plate 6 and the hot water plate 7, and other plates can be used as needed. In this embodiment, a plurality of end plates 8 in which no flow path is formed are further laminated on one end side and the other end side in the laminating direction of the plate laminate 1. The lamination of the end plates 8 can improve, for example, the strength of the plate laminate 1.

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

  The liquefied gas flow channel 61 and the hot water flow channel 71 may have the same or different flow channel cross-sectional areas. By making the cross-sectional area smaller, the liquefied gas flowing through the liquefied gas channel 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 smaller 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 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.

  The liquefied gas inflow header 2 has a hollow semi-cylindrical shape, and has an internal space 21 functioning as a liquefied gas manifold, and an inflow port 22 for flowing liquefied gas from the outside into the internal space 21. I have. The inflow port 22 is provided at the center in the longitudinal direction of the liquefied gas inflow header 2 and can connect a pipe (not shown) for supplying the liquefied gas. In a state in which the liquefied gas inflow header 12 is connected to the liquefied gas inflow portion 12 of the plate laminate 1, the plurality of liquefied gas flow path inlets 62 are open 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 therethrough.

  The gas outflow header 3 has a hollow semi-cylindrical shape, and has an internal space 31 functioning as a gas manifold and an outlet 32 for allowing gas from the internal space 31 to flow out. The outlet 32 is provided at a central portion in the longitudinal direction of the gas outflow header 3 and can connect a pipe (not shown) for discharging gas. In a state where the gas outflow header 13 is connected to the gas outflow portion 13 of the plate stack 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. This allows the gas outflow header 3 to merge and flow out the gases 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 functioning as a manifold for hot water, and an inflow port 42 for flowing hot water from the outside into the internal space 41. The inflow port 42 is provided at a central portion in the longitudinal direction of the hot water inflow header 4 and can connect a pipe (not shown) for supplying hot water. When the hot water inflow header 4 is connected to the hot water inflow portion 14 of the plate laminate 1, the plurality of hot water flow path inlets 72 are open to communicate with the internal space of the hot water inflow header 4. This allows the hot water inflow header 4 to 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 manifold of hot water, and an outlet 52 through which hot water from the internal space 51 flows out. The outlet 52 is provided at a central portion in the longitudinal direction of the hot water outflow header 5 and can connect a pipe (not shown) for discharging hot water. 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. This allows the hot water outflow header 5 to merge and discharge the hot water from the 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, for example, 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 for vaporizing a liquefied gas using the vaporizer having the above configuration will be described.

  When vaporizing the liquefied gas, first, the liquefied gas stored in a tank (not shown) (for example, an LNG tank) 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 channel 61 from the liquefied gas flow channel inlet 62 that opens to the liquefied gas flow 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 channel 71 from the hot water flow channel inlet 72 that opens to 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 channel 61 and the hot water in the hot water flow channel 71 through the layer (plate) in the plate laminate 1, and the liquefied gas is vaporized by heat from the hot water. Is 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 opening to 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 opening to 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 generation device, reheated, and then re-supplied to the hot water inflow header 4.

  Next, referring 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.

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

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

  In the present embodiment, the liquefied gas flow channel 61 extends vertically into the liquefied gas plate 6 from the side where the liquefied gas flow channel inlet 62 is provided, when viewed along the flow direction of the liquefied gas, and then After changing the course to the other side separated by the virtual straight line V, the zigzag shape extends from the other side to 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 channel outlet 63. That is, the liquefied gas flow channel 61 has a detour portion 64 that detours on the other side divided by a virtual straight line V in a route connecting the liquefied gas flow channel inlet 62 and the liquefied gas flow channel outlet 63.

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

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

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

  On the other hand, as shown in FIG. 5A, when the liquefied gas flow channel 61 has the detour portion 64, the liquefied gas flow channel extends to the other side region β divided by the virtual straight line V. 61 can be formed. This makes it possible to extend the length of the liquefied gas flow channel 61 in comparison with the above-described comparative example, thereby securing a residence time for sufficiently vaporizing the liquefied gas. As a result, in comparison with the case where the detour portion 64 is not provided, even when using relatively low-temperature hot water, the liquefied gas can be vaporized by securing the residence time, and the energy cost for heating the hot water is reduced. The effect to be obtained. For example, when installing a vaporizer on a ship such as an LNG ship, etc., 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 channel 61 has the detour portion 64, the entire liquefied gas flow channel 61 can be shifted (shifted) to the end of the liquefied gas plate 6, and as shown in the example of FIG. The area of the gas plate can be reduced. That is, in the example of FIG. 6, the length of the liquefied gas flow channel 61 is substantially the same as that of the comparative example of FIG. 5B, but the area of the liquefied gas plate 6 is larger than that of the comparative example of FIG. It is getting smaller. Thus, the size of the plate laminate 1 and the entire vaporizer can be reduced, and the effect of reducing the installation cost can be obtained. As the installation cost, for example, installation space, installation work cost, and the like can be reduced. Further, the downsizing of the vaporizer makes it possible to suitably cope with installation in a limited space in a ship such as an LNG ship, for example.

  The design of the liquefied gas channel 61 realizes one or both of extending the length of the liquefied gas channel 61 (reducing energy cost) and aligning the entire liquefied gas channel 61 (reducing installation cost). Can be.

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

  The liquefied gas that has flowed into the liquefied gas inlet 62 flows into the liquefied gas flow channel 61 in the liquefied gas flow channel formation region α from a side other than a corner of the liquefied gas flow channel formation region α. Thereby, the above-mentioned detour part 64 can be formed suitably.

  In the above description, the case where the liquefied gas flow path 61 is provided with the bypass part 64 on the other side of the virtual straight line V passing through the liquefied gas inlet 62, but as shown in FIG. Can be provided on the other side of the virtual straight line V ′ passing through the same.

  That is, the two-dot chain line indicated by V ′ in the example of FIG. 7 is virtual with respect to the side of the liquefied gas plate 6 where the liquefied gas passage outlet 63 is provided and passing through the liquefied gas passage 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) divided by a virtual straight line V '.

  In the example of FIG. 7, the liquefied gas flow channel 61 is first viewed from the side where the liquefied gas flow channel outlet 63 is provided, and vertically inside the liquefied gas plate 6 when viewed along the direction opposite to the flow direction of the liquefied gas. And then change the course to the other side separated by the virtual straight line V ', and then cross the virtual straight line V' from the other side to one side (in the illustrated example, from the upper side to the lower side). And finally reaches the liquefied gas flow path inlet 62. That is, the liquefied gas flow channel 61 has a detour portion 65 that detours on the other side divided by a virtual straight line V ′ in a route connecting the liquefied gas flow channel outlet 63 and the liquefied gas flow channel inlet 62.

  The detour section 65 can also exhibit the same effect as the detour section 64 described above. In the example of FIG. 7, by providing these two detours 64 and 65, the length of the liquefied gas flow channel 61 is increased and the liquefied gas flow channel is increased in comparison with the comparative example of FIG. It is preferable to balance both the edges 61 of the entirety.

  In addition, as shown in FIG. 7, the detour portion 65 can form the liquefied gas flow channel 61 up to the other side region β ′ separated by the virtual straight line V ′.

  Furthermore, the above-described bypass part 65 can be suitably formed by causing the liquefied gas to flow toward the liquefied gas flow path outlet 63 from a side other than the corner of the rectangular liquefied gas flow path forming area α. it 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, Although the case where the hot water outflow portion is arranged on the bottom surface has been described, the present invention is not limited to this. The liquefied gas inflow section, gas outflow section, hot water inflow section and hot water outflow section may be provided on any surface of the plate laminate. Preferably, 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 mutually opposed in the rectangular parallelepiped plate laminate. It is to be provided on another set of opposing surfaces.

  Further, the liquefied gas inflow section, gas outflow section, hot water inflow section and hot water outflow section do not necessarily need to be provided on different surfaces of the plate laminate. Two or more of the liquefied gas inflow portion, the gas outflow portion, the hot water inflow portion, and the hot water outflow portion may be juxtaposed on the same surface of the plate laminate.

  Further, the path of the liquefied gas channel 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 a part of the periphery of the liquefied gas plate (a part corresponding to the liquefied gas inflow part), and an inlet of the vaporized gas flow path provided at any part of the periphery of the liquefied gas plate. An arbitrary path can be provided as long as the path connects the liquefied gas flow path outlet provided at the portion (the portion corresponding to the gas outlet 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 has a hot water flow path inlet provided at any part of the periphery of the hot water plate (a part corresponding to the hot water inflow part) and another part of the circumference of the hot water plate (a hot water outflow part). Any route can be provided as long as it connects the hot water flow path outlet provided at the corresponding portion).

  The number of liquefied gas channels formed in one liquefied gas plate is not limited to a plurality, and may be one. In addition, 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 includes, for example, liquefied natural gas (LNG), liquefied nitrogen, liquefied hydrogen, and the like. The temperature of the liquefied gas when flowing into the plate laminate 1 is not particularly limited, and may be, for example, about -162 ° C. in the case of LNG.

  The hot water used for heating the liquefied gas is not particularly limited, and it is sufficient that the temperature at the inlet of the hot water passage is a liquid in a liquid state higher than the liquefied gas at the inlet of the liquefied gas passage. Preferably it is water. When LNG is vaporized, the temperature of the hot water can be, for example, about 50 ° C.

  The vaporizer can be used for various uses for vaporizing a liquefied gas, and can be preferably mounted on an LNG ship, for example. By mounting a vaporizer on an LNG ship, low-temperature LNG stored in an LNG tank can be efficiently vaporized by the vaporizer. The natural gas vaporized by the vaporizer can be used as fuel for a gas engine mounted on an LNG carrier. Even if 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 carburetor is mounted on an LNG ship, the waste heat of the exhaust gas from the gas engine may be used to heat the hot water. The hot water may be water previously loaded on a 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: Inlet 23: Joint part 3: Gas outflow header 31 : Internal space 32: Outlet 4: Hot water inflow header 41: Internal space 42: Inlet 5: Hot water outflow header 51: Internal space 52: Outlet 6: Liquefied gas plate 61: Liquefied gas channel 62: Liquefied gas channel Inlet 63: liquefied gas channel outlet 64, 65: detour 7: hot water plate 71: hot water channel 72: hot water channel inlet 73: hot water channel outlet 8: end plate V, V ': virtual straight line α: Liquefied gas flow path forming region β: other region divided by virtual straight line V β ′: other region divided by virtual straight line V ′

Claims (2)

A liquefied gas channel is provided on a metal plate, and a liquefied gas channel inlet communicating with one end of the liquefied gas channel is formed at one end of the plate, and the liquefied gas channel is formed at the other end of the plate. A liquefied gas plate formed with a liquefied gas flow path outlet communicating with the other end of the flow path, a hot water flow path provided on a metal plate, and one end of the plate communicated with one end of the hot water flow path A hot water flow path inlet is formed, and a plate laminated body formed by stacking a hot water plate formed with a hot water flow path outlet communicating with the other end of the hot water flow path at the other end of the plate,
A liquefied gas inflow header that is connected to a liquefied gas inflow portion where the plurality of liquefied gas flow channel inlets in the plate laminate are arranged, and distributes liquefied gas to the plurality of liquefied gas flow channel inlets,
A gas outflow header that is connected to a gas outlet where the plurality of liquefied gas passage outlets in the plate laminate are arranged, and merges the gas from the plurality of liquefied gas passage outlets,
A hot water inflow header that is connected to the hot water inflow section where the plurality of hot water flow path inlets in the plate laminate are arranged and distributes hot water to the plurality of hot water flow path inlets;
A hot water outflow header that is connected to the hot water outflow section where the plurality of hot water flow path outlets in the plate laminate are arranged, and that joins hot water from the plurality of hot water flow path outlets;
A vaporizer configured to vaporize a liquefied gas flowing through the liquefied gas flow path of the liquefied gas plate by heat from 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 a 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. And
The liquefied gas flow path further includes a bypass portion that bypasses the other side divided by the virtual straight line in a path connecting the liquefied gas flow path inlet and the liquefied gas flow path outlet. 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 area,
The liquefied gas that has flowed into the liquefied gas inlet flows into the liquefied gas flow path in the liquefied gas flow path formation area from a side portion other than a corner of the liquefied gas flow path formation area. The vaporizer according to claim 1.

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