JP2008275029A - Vaporizing device of liquefied natural gas - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vaporizing device of a liquefied natural gas capable of preventing damages of vaporizing pipes'cracks, fractures or the like by thermal stress based on the temperature difference among each of regions of the vaporizing pipes which are caused by passing the natural gas through vaporizing pipes. <P>SOLUTION: This invention comprises vaporizing pipes to vaporize the liquefied natural gas and support members to support the vaporizing pipes. The vaporizing pipes extend to the up and down directions and comprise a plurality of the main body pipes arranged in the horizontal direction and a plurality of connecting pipes which build vaporizing pipes which meander up and down, and each of neighboring main body pipes is interconnected inside the intermediate area corresponding to the region of 30%-70% of the total height of the vaporizing pipes, and the relative displacement in the pipe axis direction of each main body pipe department is permitted in the region except the interconnected region, and the vaporizing pipes are characterized in that the support members are interconnected in the intermediate area. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a liquefied natural gas vaporizer for vaporizing liquefied natural gas (LNG).

  Conventionally, a vaporizer 110 as shown in FIG. 15 is known as an air temperature type liquefied natural gas vaporizer (hereinafter also simply referred to as “vaporizer”). The vaporizer 110 is roughly composed of an evaporation unit 120 and a heating unit 170. The vaporizer 110 vaporizes (gasifies) liquefied natural gas (LNG) supplied from a tank (not shown) or the like through a supply pipe 112 by first exchanging heat with the outside air in the evaporation unit 120. Natural gas (NG: hereinafter also referred to as “vaporized liquefied natural gas”) is heated to a predetermined temperature by further exchanging heat with the outside air in the heating unit 170 and discharged from the discharge pipe 114. It is configured as follows.

  The evaporator 120 includes a plurality of parallel flow finned heat transfer tubes (hereinafter simply referred to as “heat transfer tubes”) 126, 126,. The plurality of heat transfer tubes 126, 126,... Are arranged in a state of being aligned in the horizontal direction. Each heat transfer tube 126 has a lower end connected to a distribution pipe 152 branched from the inlet-side header 150, and an upper end connected to a collecting pipe 154. At this time, a plurality of heat transfer tubes 126, 126,... Are connected and supported and fixed to the common distribution pipe 152 and the collecting pipe 154. The liquefied natural gas supplied to the evaporation unit 120 configured as described above is distributed and introduced from the inlet header 150 to the heat transfer tubes 126 via the distribution pipes 152. The liquefied natural gas is vaporized by heat exchange with the outside air in each of the introduced heat transfer tubes 126. The vaporized liquefied natural gas is collected from each heat transfer tube 126 through the collecting tube 154 and sent to the heating unit.

  Specifically, each heat transfer tube 126 includes a tube main body and a plurality of radial fins extending around the tube main body along the tube axis direction and extending in the tube radial direction. The plurality of heat transfer tubes 126, 126,... Configured as described above have predetermined intervals in the row direction (left-right direction in FIG. 15) and the column direction (direction orthogonal to the paper surface in FIG. 15) along the horizontal plane. It is arranged. Of the heat transfer tubes 126, 126,... Arranged in the row and column directions, the lower ends of the heat transfer tubes 126 arranged in the row direction are respectively connected to a common (one) distribution pipe 152. . On the other hand, the upper ends of the heat transfer tubes 126 arranged in the row direction are connected to a common collecting tube 154, respectively. In the evaporating unit 120 configured as described above, the liquefied natural gas supplied through the supply pipe 112 is distributed to the distribution pipes 152 by the inlet side header 150 and then the heat transfer pipes 126 through the distribution pipes 152 for each row. Will be distributed and introduced. Then, the liquefied natural gas vaporized in each heat transfer tube 126 is collected by the collecting pipe 154 for each row, and is sent to the heating unit 170 via the transition pipe 156 connected to the collecting pipe 154.

The heating unit 170 includes a plurality of heating tubes 176, 176,. The heating tubes 176 are arranged in the row direction so that the heating tubes 176 and 176 adjacent to each other are in a parallel posture. At this time, the number of the heating tubes 176 arranged in the row direction corresponds to the number of the heat transfer tubes 126 in the evaporation unit 120 in the row direction. In each heating tube 176, a plurality of heat transfer tubes 172, 172,. It is configured by connecting with U-shaped tubes 174, 174,. The transition pipe 156 is connected to one end of each heating pipe 176. The other end of each heating tube 176 is connected to a common outlet header 178. The natural gas generated in the evaporation unit 120 is introduced into each heating tube 176 configured in this way through the crossover tube 156. And each heating pipe | tube 176 heat-exchanges with external air, making it heat up to predetermined temperature, distribute | circulating the natural gas sent continuously in the heating pipe 176 which meanders. The natural gas heated to the predetermined temperature (vaporized liquefied natural gas) is collected in the outlet header 178 and supplied (discharged) to a consumption area or the like.
JP 2000-146090 A

  By the way, in the evaporation part 120 provided with the several heat exchanger tubes 126, 126, ... in the said vaporization apparatus 110, when liquefied natural gas is supplied, the length of each heat exchanger tube 126 will each differ. This is because the liquefied natural gas supplied from a tank or the like is introduced into each heat transfer tube 126 through the inlet side header 150 and the distribution pipe 152 in order, and therefore between the heat transfer tubes 126 due to the influence of a path difference or the like. A temperature difference occurs. This is because in each heat transfer tube 126, a difference occurs in the expansion / contraction rate based on the thermal expansion in the tube axis direction due to the temperature difference.

  As described above, when the lengths of the heat transfer tubes 126 are different from each other, stress (thermal stress) is generated in each heat transfer tube 126, and there is a risk of occurrence of damage such as cracks and cracks. In this case, a plurality of heat transfer tubes 126, 126,... Are supported and fixed to a common distribution pipe 152 and a collecting pipe 154 with their lower ends and upper ends connected respectively. In this state, when the lengths of the heat transfer tubes 126 in the tube axis direction are different from each other, distortion is generated at each connection portion of the heat transfer tubes 126 with the distribution pipe 152 or the collecting tube 154 to generate stress. Because.

  Therefore, in view of the above problems, the present invention provides vaporization of liquefied natural gas that can suppress the generation of thermal stress based on the temperature difference between the portions of the heat transfer tube (vaporization tube) generated by passing liquefied natural gas. It is an object to provide an apparatus.

  In order to solve the above problems, a liquefied natural gas vaporization apparatus according to the present invention is an apparatus for vaporizing liquefied natural gas, and the liquefied natural gas is passed through the liquefied natural gas and the outside air. A vaporizing tube for vaporizing the liquefied natural gas by heat exchange with the gas, and a support member for supporting the vaporizing tube, the vaporizing tube extending in the vertical direction and arranged in a horizontal direction A main body pipe section adjacent to each other, and a plurality of connecting pipe sections that construct a vaporization pipe meandering up and down by alternately connecting upper ends or lower ends of adjacent main body pipe sections. The tube portions are mutually connected in an intermediate region corresponding to a height region of 30% or more and 70% or less of the total height of the vaporization tube, and in a portion other than the connected portion, the tube axis of each main tube portion Relative displacement in each direction is allowed And which, the vaporizing tube is characterized in that it is connected to the supporting member in the intermediate region.

  According to such a configuration, when the plurality of main body tube portions constituting the vaporization tube are expanded and contracted by thermal expansion, the upper and lower ends of the adjacent main body tube portions are alternately connected to each other. The relative displacement between them becomes the smallest in the intermediate region. For this reason, in the meandering vaporization pipe, the main body pipe parts adjacent to each other in the intermediate region are connected to each other, so that the occurrence of stress is suppressed even if expansion and contraction occurs due to thermal expansion in each main body pipe part.

  Each of the main body tube portions may have a plurality of fins as fins extending along the tube axis direction, and the fins of the main body tube portions adjacent to each other may be connected to each other.

  According to this configuration, the surface area of the main body tube portion is increased by having a plurality of fins. Therefore, in the main body pipe portion, the heat exchange efficiency between the liquefied natural gas flowing inside and the outside air around the main body pipe portion is improved.

  Furthermore, when the adjacent main body pipe portions are connected to each other, the connection between the fins does not interfere with the connection work between the fins rather than the connection between the portions other than the fins (tube main bodies). It can be done easily. As a result, it is possible to reduce labor in manufacturing and assembly operations.

  Moreover, the structure by which the both ends of the sequence direction of the said main body pipe part among the said vaporization pipe | tubes are connected with the said supporting member may be sufficient.

  According to such a configuration, the support member may be configured to support both ends of the main body tube portion in the arrangement direction of the vaporization tube. Therefore, the support member can have a simple configuration, and it is possible to reduce manufacturing costs and labor in assembling work.

  In addition, a connecting member that connects adjacent main body tube portions is provided, and the support member includes a beam member on which a connecting member of an intermediate portion in the arrangement direction of the main body tube portions in the vaporizing tube is mounted. The structure which has may be sufficient.

  According to such a configuration, the support member supports the vaporizing tube at the intermediate portion in addition to both ends of the main body tube portion in the arrangement direction. Therefore, the support member reduces the load applied to the intermediate portion of the vaporizing tube 22 due to its own weight by adding an inexpensive and simple configuration, and suppresses the deflection of the vaporizing tube due to wind or vibration.

  Further, the connecting member mounted on the beam member is configured by a pair of sliding members respectively provided on the adjacent main body pipe portion with the beam member interposed therebetween, and the pair of sliding members are arranged on the beam member on the beam member. The configuration may be such that relative displacement in the arrangement direction is possible by sliding in the arrangement direction of the main body tube portions.

  According to such a configuration, in a common vaporization pipe, a stress (thermal stress) based on thermal expansion in the arrangement direction of the main body pipe portion by the liquefied natural gas flowing through the inside is the same direction of the pair of sliding members (the above-mentioned Absorbed by relative displacement in the direction of alignment). Therefore, the thermal stress generated by the liquefied natural gas flowing through the vaporization pipe is further suppressed.

  In addition, a plurality of vaporization tubes are provided as the vaporization tubes, and these vaporization tubes are arranged in a direction orthogonal to the arrangement direction in a posture in which the arrangement directions of the main body tube portions are parallel to each other, The vaporization pipe may be connected to the common support member.

  According to this configuration, a large number of vaporization tubes can be efficiently arranged on the common support member. Therefore, space saving and high performance of the device can be achieved when the device is installed.

  Also, a plurality of spacers that are interposed between the main body tube portions of the vaporizing tubes adjacent to each other, and that regulate the approach of the main body tube portions while allowing the main body tube portions to be displaced relative to each other in the tube axis direction. May be provided.

  According to such a configuration, in the arrangement direction of the plurality of vaporization tubes, one main body tube portion restricts access to the other main body tube portions adjacent to both sides across the one main body tube portion by the spacer. Is done. Therefore, the movement of the one main body tube portion along the arrangement direction of the plurality of vaporization tubes is restricted. That is, the interval between the adjacent main body tube portions in the arrangement direction of the plurality of vaporizing tubes is kept constant. As a result, the vibration of the vaporization tubes in the arrangement direction of the plurality of vaporization tubes caused by wind or vibration is suppressed.

  In addition, the spacer allows the main body tube portions of the vaporizing tubes adjacent to each other to be displaced relative to each other in the tube axis direction. Therefore, even if the adjacent main body tube portions are relatively displaced in the tube axis direction through the spacer due to a temperature difference of the liquefied natural gas flowing through the inside, no stress (thermal stress) is generated by the spacer. .

  Further, the spacer is interposed between the main body tube portions of the vaporization tubes adjacent to each other, and is also interposed between the main body tube portions of the common vaporization tube in a region outside the intermediate region. The main body tube portions may be configured to restrict the closeness between the main body tube portions while allowing the main body tube portions to be relatively displaced in the tube axis direction.

  According to this configuration, in the same manner as described above, in addition to suppressing the deflection in the arrangement direction of the vaporizing tubes (the direction orthogonal to the arrangement direction of the main body tube portions), the vibration in the arrangement direction of the main body tube portions is also suppressed. Is done.

  Further, the spacer interposed between the main body tube portions of the common vaporization tube allows relative displacement in the tube axis direction between the main body tube portions of the common vaporization tube. Therefore, as described above, even if the main tube portions of the common vaporization tube are relatively displaced in the tube axis direction due to the temperature difference of the liquefied natural gas flowing through the inside, stress (thermal stress) is generated by the spacer. Absent.

  Further, in the upper side region and the lower side region outside the intermediate region of the vaporization tube, a spacer interposed between the main body tube portions of the vaporization tubes adjacent to each other, and the main body tube portion of the common vaporization tube The spacer interposed between each other may be configured so as to be at the same height position.

  According to this configuration, in the upper side region and the lower side region of the vaporization tube, the spacers interposed between the main body tube portions in the arrangement direction of the vaporization tubes, and the arrangement of the main tube portions of the common vaporization tube The spacers interposed between the main body tube portions in the direction are arranged so as to be at the same height position. Therefore, the main body tube portion in the upper side region and the lower side region of the vaporization tube is sandwiched between the spacers from four sides, and the vaporization tube arrangement direction and the common vaporization tube main body tube portion arrangement direction Is more suppressed.

  Each of the spacers is fixed to one main body tube portion of the main body tube portions sandwiching the spacer, and can slide on the other main body tube portion in the tube axis direction with respect to the other main body tube portion. The structure which abuts so that may be sufficient.

  According to such a configuration, the spacer is fixed at a predetermined height position of the main body tube portion (vaporization tube), the relative displacement in the tube axis direction between the main body tube portions sandwiching the spacer is allowed, and the spacer is The approach between the main body tube portions to be sandwiched is suppressed.

  Therefore, with a simple configuration, the generation of stress based on the relative displacement is suppressed, and the vibration of the main body tube portion in the direction sandwiching the spacer is suppressed.

  The support member is attached to the frame material surrounding the vaporizing tube and the main body tube portion of the vaporizing tube adjacent to the frame material, thereby causing horizontal deflection of the main body tube portion. And a vibration suppressing member that is capable of adjusting a distance from the frame material along a direction from the frame material toward a main body tube portion of a vaporization tube adjacent to the frame material. The structure which has this may be sufficient.

  According to such a configuration, vibration in the direction of the vibration suppression member in contact with the main body tube portion located at the peripheral portion of the vaporization tube surrounded by the frame member is suppressed.

  In addition, since the vibration suppressing member is attached to the frame member so that the distance from the frame member can be adjusted, it can be easily attached so as to come into contact with the main body tube portion of the vaporization tube adjacent to the frame member.

  As mentioned above, according to this invention, the vaporization apparatus of the liquefied natural gas which can suppress generation | occurrence | production of the thermal stress based on the temperature difference between each site | part of the vaporization pipe | tube produced by passing liquefied natural gas is provided. Will be able to.

  Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.

  As shown in FIG. 1, a liquefied natural gas (LNG) vaporizer (hereinafter also simply referred to as “vaporizer”) 10 includes a plurality of vaporizer tubes 22 each having an evaporation section 20A and a heating section 20B. . The vaporizer 10 vaporizes (gasifies) liquefied natural gas (LNG) supplied from a tank (not shown) or the like through a supply pipe 12 by first exchanging heat with outside air in the evaporation section 20A. Natural gas (NG) is further heated to a predetermined temperature by exchanging heat with the outside air in the heating unit 20B, and then supplied to a consumption area or the like through the discharge pipe 14.

  Although described in detail below, in the present embodiment, the evaporation unit 20A and the heating unit 20B are portions determined by the state of liquefied natural gas in the common vaporization tube 22. Therefore, below, it demonstrates as the vaporization tube 22, without distinguishing the evaporation part 20A and the heating part 20B.

  As shown in FIGS. 2 to 6, the vaporizer 10 has liquefied natural gas passed through it, vaporizes the liquefied natural gas by heat exchange between the liquefied natural gas and the outside air, and then rises to a predetermined temperature. A plurality of heat transfer tubes for heating (in this embodiment, “heat transfer tubes” are referred to as “vaporization tubes”) 22, 22,... And for supporting the plurality of vaporization tubes 22, 22,. And a support member 24.

  The vaporizing tube 22 extends in the vertical direction and is arranged in the horizontal direction (left-right direction in FIG. 2), and the upper and lower ends of the main body pipe portions 26, 26 adjacent to each other. Are connected to each other alternately. Further, the vaporizing tube 22 connects the main body pipe portions 26, 26 adjacent to each other in an intermediate region in the vertical direction (the tube axis direction of the main body tube portion 26), and connects the intermediate region to the support member 24. Has been supported. The plurality of vaporizing tubes 22, 22,... Are in a posture (the left-right direction in FIG. 2) orthogonal to the arrangement direction (the left-right direction in FIG. 2) with the arrangement direction of the main body pipe portions 26, 26,. In a direction perpendicular to the direction). In the present embodiment, the arrangement direction of the plurality of main body pipe portions 26, 26,... Constituting the vaporization tube 22 is a row direction, and the arrangement direction of the plurality of vaporization tubes 22, 22,. In the present embodiment, the intermediate region of the main body pipe portion 26 refers to a portion corresponding to a height region of 30% or more and 70% or less of the total height of the vaporizing tube 22, preferably 40 of the total height of the vaporizing tube 22. The region corresponding to the height region of not less than 60% and not more than 60%.

  Specifically, each main body pipe portion 26 constituting the vaporizing tube 22 is a so-called parallel flow finned vaporizing tube, which extends along the tube axis direction (vertical direction in FIG. 2) and extends in the radial direction of the tube main body. 30 has a plurality of fins 30, 30,. That is, the main body pipe portion 26 includes a long straight tubular pipe main body, and a plurality of fins 30, 30,... .

  The plurality of main body pipe portions 26, 26,... Formed in this way are arranged in a line in the row direction so that the main body pipe portions 26, 26 adjacent to each other are parallel to each other and are equally spaced from each other. Yes. The plurality of main body pipe parts 26, 26,... Arranged in this way are connected in the vertical direction by connecting pipe parts 28, 28,... Made of U-shaped pipe materials (U-shaped pipes). A meandering vaporization tube 22 is formed.

  In addition, in this embodiment, although the main body pipe part 26 which forms the vaporization pipe | tube 22, and the U-shaped pipe | tube are comprised by a separate member, it is not necessary to be limited to this. That is, one end portion of the main body pipe portion is bent, and the shape (J-shape) is such that one U-tube is integrally connected to one main body pipe portion 26 in the present embodiment. There may be. In the plurality of J-shaped main body pipe parts configured as described above, the vaporization pipe meandering up and down is similar to the above by connecting one end and the other end of the adjacent main body pipes. 22 is formed.

  In the vaporizing tube 22, the main body pipe portions 26 and 26 adjacent to each other are connected to each other by a connecting member 32 in an intermediate region in the tube axis direction. At this time, the connecting member 32 connects the fins 30 and 30 of the main body pipe portions 26 and 26 adjacent to each other, more specifically, the fins 30 and 30 extending in opposite directions. The vaporizing tube 22 configured in this manner has both ends in the row direction connected to the support member 24 and an intermediate portion in the row direction (in this embodiment, between the fifth and sixth from the left in FIG. 5). In the following, the number of the main tube portions 26 in the row direction is counted from left to right in FIG. 5, and the number of the main tube portions 26 or vaporization tubes 22 in the column direction is counted from bottom to top in FIG. The intermediate portion connecting member 34 is supported by being placed on a beam member 24b provided on the supporting member 24 described later.

  The connecting member 32 is formed in a rectangular plate-like body for connecting the main body pipe portions 26 and 26 adjacent to each other. The connecting member 32 is connected (welded in the present embodiment) to both end portions of the connecting member 32 to the tip portions of the fins 30, 30 extending in the opposing direction (facing each other). The main body pipe portions 26 and 26 adjacent to each other are connected.

  The intermediate part connecting member 34 is composed of a pair of sliding members 34a and 34b. The pair of sliding members 34a and 34b are respectively attached to the fins 30 and 30 at opposite positions of the adjacent main body pipe portions 26 and 26 with the beam member 24b interposed therebetween, and are mounted on the beam member 24b. The pair of sliding members 34a and 34b are each formed in a rectangular plate-like body as shown in FIGS. The left side end of one sliding member 34a is connected to the tip of the fin 30 (extending in the direction) at a position facing the sixth main body pipe portion 26 in the fifth main body pipe portion 26 (in the present embodiment, , Welding). Further, the right side end of the other sliding member 34b is connected to the tip of the fin 30 (extending in the direction) in the sixth body tube portion 26 at a position facing the fifth body tube portion 26 (this embodiment). Is welded). At this time, as shown in FIGS. 8A and 8B, the pair of sliding members 34a and 34b are positioned at the same height in the tube axis direction of the main body tube portion 26, more specifically, the vaporizing tube 22 Are connected to the upper surface of the beam member 24b so that the lower end thereof is slidably contacted, and the free end sides of the pair of sliding members 34a and 34b are in sliding contact with each other. By being attached in this way, the pair of sliding members 34a and 34b slide in the row direction (the arrangement direction of the plurality of main body pipe portions 26, 26,... Constituting the vaporizing tube 22) with respect to the beam member 24b, respectively. It becomes possible to move. Therefore, the fifth main body pipe portion 26 and the sixth main body pipe portion 26 can be brought into contact with each other (relative displacement) while maintaining the same height position in the tube axis direction.

  As shown in FIG. 9, in the vaporization tubes 22, 22,... Arranged in the row direction, a plurality of row direction spacers 36 are disposed between the main body pipe portions 26, 26 of the vaporization tubes 22, 22 adjacent to each other. , 36,... Are interposed. Further, a row direction spacer 36 ′ having the same configuration as that of the column direction spacer 36 is interposed between adjacent main body pipe portions 26, 26 of the common vaporization tube 22 in a region outside the intermediate region in the tube axis direction. It is provided as follows. In the present embodiment, the column-direction spacers 36 interposed in the column direction of the plurality of main body pipe portions 26, 26,... And the row-direction spacers 36 ′ interposed in the row direction are slightly different, but are the same. It may be a shape.

  Hereinafter, the column direction spacer 36 and the row direction spacer 36 'will be described. However, the column direction spacers 36 and the row direction spacers 36 ′ have the same configuration. Therefore, only one (spacer 36) will be described, and hereinafter, both spacers will be simply referred to as “spacer 36” without distinction.

  The spacer 36 is for restricting the adjacent main body pipe portions 26 and 26 from approaching each other, and allows the main body pipe portions 26 and 26 to be relatively displaced in the tube axis direction. Is attached. In addition, a plurality of spacers 36, 36,... Are attached to one main body pipe portion 26 so as to be sandwiched from the row direction (or the matrix direction), so that the plurality of main body pipe portions 26, 26,. , 36,... Are arranged in the column direction (or matrix direction). The spacer 36 has a structure that suppresses the displacement in the contact / separation direction between the adjacent main body pipe portions 26 and 26 in one main body pipe portion 26 by being arranged in this way.

  Specifically, as shown in FIG. 10, the spacer 36 includes a spacer main body 36a having a substantially triangular shape in plan view and a spacer extending portion 36b extending in a plate shape from the apex angle of the triangle. ing. The spacer main body 36a is formed in a substantially triangular columnar shape in plan view, and a central portion is hollowed out in a triangular columnar shape in the same direction. A surface (spacer sliding surface) 36c on the base side of the triangle is formed as a curved surface slightly curved toward the center of the spacer main body 36a.

  The spacer 36 configured in this manner is attached to the upper end portion and the lower end portion of the main body pipe portion 26, and is also attached to the center portion (position where the connecting member 32 is provided) in the row direction. Further, the spacer 36 is fixed to one of the main body pipe portions 26 between the main body pipe portions 26 and 26 sandwiching the spacer 36, and can be slid in the tube axis direction with respect to the other main body pipe portion 26. Abut. Specifically, in the spacer 36, the distal end portion of the spacer extending portion 36 b is fixed to the distal end portion of the fin 30 (extending in the direction) at a position facing the other main tube portion 26 in the one main tube portion 26. In this embodiment, the spacer sliding surface 36c is disposed in the tube axial direction at the tip of the fin 30 (extending in the direction) at a position facing the one side main body pipe portion 26 in the other side main body pipe portion 26 (welding). Is attached so as to be slidable.

  2 to 5 and as shown in FIGS. 11 and 12, the support member 24 includes a frame member 24a and a beam member 24b. The frame member 24a is a member assembled in a square frame shape surrounding the outer periphery of the plurality of vaporizing tubes 22, 22,... Configured and arranged as described above. The beam member 24b is a member that is bridged (bridged) between the intermediate portions in the row direction of the frame member 24a in order to place the intermediate portion connecting member 34. Both the frame member 24a and the beam member 24b constituting the support member 24 are made of a tube material having a square cross section or H-shaped steel. As shown in FIG. 14, the support member 24 configured in this way is an intermediate region in the height direction of the gantry 38 for installing the vaporizing tube 22 (in this embodiment, 30 of the total height of the gantry 38. A portion corresponding to a height region of not less than 70% and not more than 70%, preferably a portion corresponding to a height region of not less than 40% and not more than 60% of the total height of the gantry 38). Are connected via a connecting member 40.

  The connecting member 40 is formed in a rectangular plate-like body. One side end of the connecting member 40 is at a position (extends in the direction) facing the frame member 24a in a main body tube portion (main body tube portion located at both ends of the vaporizing tube 22) 26 adjacent to the frame member 24a. It is connected (welded in this embodiment) to the tip of the fin 30. The other side end of the connecting member 40 is connected to the frame member 24a via an angle with an L-shaped cross section. By being connected in this way, the vaporizing tube 22 is connected to and supported by the support member 24 via the connecting member 40.

  The gantry 38 includes four columns 42, 42, 42, 42 erected at the four corners, and an upper frame 44 a, a lower frame 44 b, and the support member 24 provided on the column 42. The upper frame 44a and the lower frame 44b are formed in a square frame shape in plan view, and when the vaporizing tube 22 is disposed on the gantry 38, the upper frame 44a and the lower frame 44b are respectively at height positions corresponding to the upper end portion and the lower end portion of the main body pipe portion 26. Is provided. In addition, the support member 24 is provided at a height position corresponding to the intermediate region of the main body pipe portion 26 when the vaporizing tube 22 is disposed on the gantry 38.

  The support member 24 further includes a vibration suppressing member 46 that is fixed to the frame member 24a and abuts on the main body pipe portion 26 of the vaporizing tube 22 adjacent to the frame member 24a. The shake suppressing member 46 has a structure capable of adjusting the distance from the frame member 24a along the direction from the frame member 24a toward the main body pipe portion 26 of the vaporizing tube 22 adjacent to the frame member 24a. Specifically, a plurality of frame members 24a are provided at predetermined intervals in a portion along the row direction. As shown in FIG. 13, the shake suppressing member 46 includes a base portion 46 a and an elastic member 46 b.

  The base 46a is formed by attaching a bolt member 46d for fixing the base 46a to the frame member 24a to a base main body 46c in which a recess for fitting the elastic member 46b is formed. The elastic member 46b has a heat insulating property and is formed of a synthetic resin that can be elastically deformed.

  As shown in FIG. 14, the shake suppressing member 46 configured in this way is located (extends in the direction) at a position facing the frame member 24 a in the main body pipe portion 26 of the vaporization tube 22 adjacent to the frame member 24 a. The elastic member 46b is in contact with the tip of the fin 30 and is fixed to the frame member 24a via a bolt member 46d. In the present embodiment, the tip of the fin 30 and the elastic member 46b are in contact with each other so as to interpose a contact plate 48 formed of a rectangular plate-like body. Further, the shake suppression member 46 is arranged so that two main body pipe portions 26 and 26 adjacent to the one shake suppression member 46 along the frame member 24a come into contact with each other. By doing so, when the shake suppressing member 46 is fixed to the frame member 24a, it is easy to adjust the elastic member 46b so that the tip of the fin 30 of the adjacent main body pipe portion 26 abuts.

  Further, in the present embodiment, the shake suppressing member 46 is also provided in the upper frame 44a and the lower frame 44b. The upper frame 44a and the lower frame 44b are provided not only in the row direction but also in the column direction. That is, it is provided on four sides of a frame-like frame (upper frame 44a and lower frame 44b) having a square shape in plan view so as to surround the plurality of vaporizing tubes 22, 22,. At this time, similarly to the support member 24, the shake suppression member is arranged such that the two main body pipe portions 26 and 26 adjacent to each other along the upper frame 44 a (or the lower frame 44 b) abut against one shake suppression member 46. 46 is disposed on the upper frame 44a (or the lower frame 44b) (see FIGS. 5A and 5C).

  As described above, the inlet-side header 50 is connected to one end of the plurality of vaporizing tubes 22, 22,... Constituting the vaporizing device 10. The inlet side header 50 is also connected to the supply pipe 12, and the liquefied natural gas supplied from the tank or the like through the supply pipe 12 is distributed by the inlet side header 50 and distributed to each vaporization pipe 22. ·be introduced. Further, an outlet side header 52 is connected to the other end of the plurality of vaporizing tubes 22, 22,. The outlet header 52 is also connected to the discharge pipe 14, and the liquefied natural gas vaporized in each vaporization pipe 22 is collected and discharged toward the consumption area through the discharge pipe 14.

  Each vaporizing tube 22 is divided into an evaporation unit 20A and a heating unit 20B. The evaporation unit 20 </ b> A and the heating unit 20 </ b> B are portions of the vaporization tube 22 determined by the state of the liquefied natural gas that circulates inside the vaporization tube 22. Specifically, in each vaporization tube 22, the evaporation part 20A is a part until the liquefied natural gas flowing inside is vaporized (gasified) by heat exchange with the outside air, and the heating part 20B Is a site where the vaporized liquefied natural gas is further heated to the desired temperature by heat exchange with the outside air. That is, the vaporizing tube 22 is divided into an upstream side and a downstream side, and the upstream side is an evaporation unit 20A and the downstream side is a heating unit 20B. Therefore, the length of the vaporization tube 22 required until the liquefied natural gas is vaporized varies depending on the flow rate and flow rate of the liquefied natural gas flowing through each vaporization tube 22 and the temperature of the outside air. Therefore, the boundary position between the evaporation section 20A and the heating section 20B in the vaporization tube 22 changes in a fluid manner depending on the operating conditions of the apparatus 10 when vaporizing the liquefied natural gas. That is, the boundary position may be in the middle of the main body pipe part 26 or in the middle of the connection pipe part (U-shaped pipe) 28.

  As described above, in practice, the boundary position between the evaporation unit 20A and the heating unit 20B changes in a fluid manner depending on the operating conditions of the apparatus 10 and the like. However, for convenience of explanation, in FIG. 1, the center of the connecting pipe portion 28 connecting the fourth main body pipe portion 26 and the fifth main body pipe portion 26 from the left is the boundary, the left side is the evaporation portion 20A, and the right side is the additional portion. It is illustrated as a warm part 20B. Also in other attached drawings, in the vaporizing tube 22, the evaporation unit 20 </ b> A and the heating unit 20 </ b> B are divided (separated) at predetermined positions.

  Next, the effect of the vaporization apparatus 10 comprised as mentioned above is demonstrated.

  In the vaporizing tube 22 of the vaporizing device 10, the adjacent main body pipe portions 26 and 26 are mutually connected in the intermediate region, and the relative displacement in the tube axis direction is other than the connected portion. Is allowed. The vaporizing tube 22 is configured to be connected to the support member 24 in the intermediate region.

  According to this configuration, when the plurality of main body pipe portions 26, 26,... Constituting the vaporizing tube 22 expand and contract by thermal expansion, the upper ends or lower ends of the adjacent main body pipe portions 26, 26 are alternately connected. Therefore, the relative displacement between the main body pipe portions 26 and 26 becomes the smallest in the intermediate region. For this reason, in the meandering vaporization tube 22, the main body pipe portions 26, 26 adjacent to each other in the intermediate region are connected to each other, so that even if expansion and contraction occurs due to thermal expansion in each main body pipe portion 26, stress is generated. Is suppressed.

  Further, the plurality of main body tube portions 26, 26,... Constituting the vaporizing tube 22 are connected to each other at the intermediate region. In particular, the main body pipe portions 26 and 26 adjacent to each other are connected within a range of 30% or more and 70% or less of the total height of the vaporization tube 22, whereby a strength preferable as a product can be obtained. Furthermore, when the main body pipe portions 26 and 26 adjacent to each other are connected within a range of 40% or more and 60% or less of the total height of the vaporization tube 22, a more preferable strength as a product can be obtained.

  Further, each main body pipe portion 26 has a plurality of fins 30, 30,..., Thereby increasing the surface area of the main body pipe portion 26 by the surface area of the plurality of fins 30, 30,. The contact area between H.26 and the ambient air around it increases. Therefore, in the main body pipe portion 26, the heat exchange efficiency between the liquefied natural gas flowing inside and the outside air around the main body pipe portion 26 is improved.

  Furthermore, it becomes easy to connect by fins 30 and 30 of the main body pipe parts 26 and 26 adjacent to each other being connected. That is, the connection between parts (tube main bodies) other than the fins 30 is difficult to connect because the fins 30, 30,... Therefore, the connection operation becomes easier when the fins 30 and 30 are connected to each other, particularly, the tip portions of the opposing fins 30 and 30 are connected to each other. Therefore, by connecting the fins 30 and 30, it is possible to reduce labor in manufacturing and assembling work compared to connecting other parts.

  Further, both ends of the vaporizing tube 22 in the row direction are connected to the support member 24. Thus, the support member 24 may be configured to support at least both ends of the vaporizing tube 22 in the row direction. Therefore, the support member 24 can be configured simply. As a result, it is possible to reduce manufacturing costs and labor in assembling work.

  Further, the vaporizing tube 22 includes a connecting member 32 that connects adjacent main body pipe portions 26, 26, and the support member 24 is an intermediate member in the row direction of the main body tube portion 26 in the vaporizing tube 22 of the connecting members 32. It has a beam member 24b on which a partial connecting member (intermediate portion connecting member) 34 is placed. Accordingly, the support member 24 supports the vaporizing tube 22 at the middle portion in addition to both ends in the row direction. Therefore, the support member 24 reduces the load applied to the intermediate portion of the vaporizing tube 22 due to its own weight by adding an inexpensive and simple configuration such as a beam composed of a simple square tube material, and also vaporizes the tube due to wind, vibration, or the like. 22 fluctuations are suppressed.

  The connecting member 34 mounted on the beam member 24b is composed of a pair of sliding members 34a and 34b provided on the main body pipe portions 26 and 26 adjacent to each other with the beam member 24b interposed therebetween. The moving members 34a, 34b slide relative to each other in the row direction by sliding on the beam member 24b in the row direction. Therefore, in the vaporization tube 22, the stress (thermal stress) based on the thermal expansion in the row direction due to the liquefied natural gas flowing through the inside is caused by the relative displacement of the pair of sliding members 34a and 34b in the row direction. Absorbed. As a result, the thermal stress generated by the liquefied natural gas flowing through the vaporizing tube 22 is further suppressed.

  Further, the vaporizer 10 includes a plurality of vaporization tubes 22, 22,. These vaporization tubes 22 are arranged in a direction (column direction) orthogonal to the arrangement direction in a posture in which the arrangement directions of the main body pipe portions 26 are parallel to each other, and the vaporization tubes 22 are commonly supported in the intermediate region. Connected to member 24. Therefore, a large number of vaporizing tubes 22 can be efficiently arranged on the common support member 24. As a result, it is possible to save space when installing the vaporizer 10 and to improve the performance of the vaporizer 10.

  Further, the vaporizer 10 is interposed between the main body pipe portions 26 and 26 of the vaporization tubes 22 and 22 adjacent to each other, and allows the main body pipe portions 26 and 26 to be relatively displaced from each other in the tube axis direction. However, a plurality of spacers 36, 36,... For restricting the approach of the main body pipe portions 26, 26 are provided. At this time, in the row direction, the one main body pipe portion 26 is restricted by the spacer 36 from approaching the other main body pipe portions 26 and 26 adjacent to both sides of the one main body pipe portion 26. . Therefore, the movement of the one main body pipe portion 26 along the column direction is restricted. That is, the interval between the adjacent main body pipe portions 26 in the row direction is kept constant. As a result, the vibration of the vaporizing tubes 22 in the column direction caused by wind or vibration is suppressed.

  Moreover, the spacer 36 allows the main body pipe portions 26 and 26 of the vaporizing tubes 22 and 22 adjacent to each other to be relatively displaced in the tube axis direction. Therefore, even if the main body pipe portions 26 and 26 adjacent to each other through the spacer 36 are relatively displaced in the tube axis direction due to the temperature difference of the liquefied natural gas flowing inside the vaporization tube 22, the interposed spacer 36 is interposed. The stress (thermal stress) is not generated by.

  In addition, the spacer 36 (36 ′) is interposed between the main body pipe portions 26 and 26 of the vaporization tubes 22 and 22 adjacent to each other, and in addition, the main body of the common vaporization tube 22 in a region outside the intermediate region. It is also interposed between the pipe portions 26, 26, and restricts the approach of the main body pipe portions 26, 26 while allowing the main body pipe portions 26, 26 to be displaced relative to each other in the tube axis direction. Therefore, in the same manner as described above, the vaporization tube 22 is suppressed from swinging in the column direction in addition to being suppressed from swinging in the row direction.

  In addition, the spacer 36 (36 ′) interposed between the main body pipe portions 26 and 26 of the common vaporization tube 22 allows relative displacement in the tube axis direction between the main body pipe portions 26 and 26 of the common vaporization tube 22. Allowed. Therefore, as described above, even if the main body pipe portions 26 and 26 of the common vaporization tube 22 are relatively displaced in the tube axis direction due to a temperature difference of the liquefied natural gas flowing inside the vaporization tube 22, the interposed spacer No stress (thermal stress) is generated by 36.

  Further, in the upper region and the lower region outside the intermediate region of the vaporization tube 22, the spacer 36 interposed between the main body pipe portions 26, 26 of the vaporization tubes 22, 22 adjacent to each other, and the common The spacer 36 ′ is interposed between the main body pipe portions 26, 26 of the vaporizing tube 22 so as to be at the same height position. Therefore, the spacer 36 and the spacer 36 ′ are arranged at the same height in the upper region and the lower region of the vaporizing tube 22. As a result, the main body tube portion 26 in the upper region and the lower region of the vaporization tube 22 is sandwiched by spacers 36, 36, 36 ′, 36 ′ from four directions (row direction and column direction) ( Therefore, the deflection in the arrangement direction of the vaporization tubes 22 and the arrangement direction of the main body pipe portions 26 of the common vaporization tubes 22 are further suppressed.

  In addition, a plurality of spacers 36, 36,... (36 ′, 36 ′,...) Are attached to one main body pipe portion 26 so as to be sandwiched from the column direction (or the matrix direction) as described above. Are arranged in the column direction (or the matrix direction) through the spacers 36, 36,... (36 ′, 36 ′,...). The spacer 36 (36 ') has a structure that suppresses displacement of adjacent main body pipe portions 26, 26 in one main body pipe portion 26 in the contact / separation direction by being arranged in this way. Therefore, when vibration due to wind or vibration of the main body pipe portion 26 is suppressed, stress generated between the adjacent main body pipe portions 26 and 26 via the spacer 36 is caused by elastic deformation of the spacer 36 (36 ′). Absorbed. As a result, the generation of stress is further suppressed in the adjacent main body pipe portions 26 and 26 via the spacer 36 (36 ').

  Further, each spacer 36 (36 ′) is fixed to the fin 30 of one main body pipe portion 26 of the main body pipe portions 26, 26 sandwiching the spacer 36, and is attached to the tip of the fin 30 of the other main body pipe portion 26. It attaches so that it may contact | abut to the other main body pipe part 26 so that the slide to the pipe-axis direction. Therefore, the spacer 36 (36 ′) is fixed at a predetermined height position of the main body pipe part 26 (vaporization pipe 22), and the main body pipe parts 26, 26 sandwiching the spacer 36 (36 ′) are arranged in the tube axis direction. Relative displacement is allowed, and the proximity of the main body pipe portions 26, 26 sandwiching the spacer 36 (36 ′) is suppressed.

  Therefore, with a simple configuration, the generation of stress based on the relative displacement is suppressed, and the deflection in the direction in which the spacer 36 (36 ') of the main body pipe portion 26 is sandwiched is suppressed.

  Further, the support member 24 is fixed to the frame member 24a surrounding the vaporizing tube 22, and the main body by contacting the fin 30 of the main body pipe portion 26 of the vaporizing tube 22 adjacent to the frame member 24a. And a vibration suppressing member 46 that suppresses the horizontal vibration of the pipe portion 26. The shake suppressing member 46 has a structure capable of adjusting the distance from the frame member 24a along the direction from the frame member 24a toward the main body pipe portion 26 of the vaporizing tube 22 adjacent to the frame member 24a. Therefore, the vibration suppressing member 46 is attached to the frame member 24a so that the distance from the frame member 24a can be adjusted, so that the shake suppressing member 46 can be easily attached to come into contact with the main body pipe portion 26 of the vaporization tube 22 adjacent to the frame member 24a. .

  Further, the stress generated when the main body pipe portion 26 abuts against the shake suppressing member 46 and the shake is suppressed is absorbed by the elastic deformation of the shake suppressing member 46.

  The liquefied natural gas vaporizer of the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the present invention.

  For example, in the present embodiment, a plurality of vaporization tubes 22, 22,... Are arranged in the column direction in the vaporization apparatus 10, but it is not necessary to be limited to this. Therefore, only one vaporizing tube 22 may be arranged in the vaporizing device 10. Even if it arrange | positions in this way, since the several main body pipe parts 26, 26, ... are arranged in the row direction, it becomes possible to suppress a thermal stress.

  In the present embodiment, the evaporation unit 20A and the heating unit 20B are integrally formed, but the evaporation unit and the heating unit may be configured separately. In this case, the evaporation unit may be configured similarly to the above configuration. This is because the temperature of the liquefied natural gas is larger in the evaporating section than in the heating section, so that the amount of relative displacement between the plurality of main body pipe sections 26, 26,... Because.

  Further, in the present embodiment, the spacer 36 (36 ′) is provided in the region deviating from the intermediate region between the main body pipe portions 26 of the common vaporization tube, but it is necessary to be limited to this. Instead, it may be provided in an intermediate region excluding the connected sites. Even if the spacer 36 (36 ') is provided at such a position, the vibration of the main body pipe portion 26 (vaporization tube 22) can be suppressed as described above.

The schematic diagram of the vaporization apparatus of the liquefied natural gas which concerns on this embodiment is shown. The schematic front view in the vaporization apparatus which concerns on the embodiment is shown. The schematic left view in the vaporization apparatus which concerns on the same embodiment is shown. The schematic right view in the vaporization apparatus which concerns on the same embodiment is shown. 1 is a schematic plan view, FIG. 2B is a schematic cross-sectional view taken along line AA in FIG. 2, and FIG. 2C is a schematic cross-sectional view taken along line BB in FIG. The figure is shown. The partially expanded perspective view of the vaporization pipe | tube in the vaporization apparatus which concerns on the embodiment is shown. It is an intermediate | middle part connection member (a pair of sliding member) in the vaporization apparatus which concerns on the same embodiment, Comprising: (a) shows the front view of one sliding member, (b) is the front view of the other sliding member. Indicates. It is a support member in the vaporization apparatus which concerns on the same embodiment, Comprising: (a) shows the general | schematic partially enlarged front view of the connection part of a frame material and a beam member, (b) is schematic C- in FIG. 8 (a). C sectional drawing is shown. 2 is a partial enlarged view of the DD cross-sectional view in FIG. 2, and FIG. 2B is a partial enlarged view of the AA cross-sectional view in FIG. 2. . The schematic perspective view of the spacer in the vaporization apparatus which concerns on the embodiment is shown. It is a mount in the vaporization apparatus which concerns on this embodiment, Comprising: (a) shows a schematic front view, (b) shows schematic EE sectional drawing in FIG. The schematic side view of the mount frame in the vaporization apparatus which concerns on the embodiment is shown. It is a shake suppression member in the vaporization apparatus which concerns on the same embodiment, Comprising: (a) shows a top view and (b) shows a side view. FIG. 5B is a partially enlarged view of FIG. 5B in the vaporizer according to the same embodiment. The schematic diagram of the vaporization apparatus of the conventional liquefied natural gas is shown.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Vaporizer, 12 ... Supply piping, 14 ... Discharge piping, 20A ... Evaporation part, 20B ... Heating part, 22 ... Vaporization pipe, 24 ... Support member, 24a ... Frame material, 24b ... Beam member, 26 ... Main body pipe part, 28 ... Connection pipe part, 30 ... Fin, 32 ... Connecting member, 34 ... Intermediate part connecting member (connecting member), 34a, 34b ... Sliding member, 36 ... Spacer (columnar spacer), 36 '... Spacer (spacer in the row direction), 36a ... spacer main body, 36b ... spacer extension, 36c ... spacer sliding surface, 38 ... mount, 40 ... connecting member, 42 ... column, 44a ... upper frame, 44b ... lower frame, 46 ... Sway suppression member, 46a ... Base, 46b ... Elastic member, 46c ... Base body, 46d ... Bolt material, 48 ... Contact plate, 50 ... Entrance header, 52 ... Outlet header, 54 ... Crossover pipe, 110 ... Air Disguise , 112 ... supply pipe, 114 ... discharge pipe, 120 ... evaporating section, 126 ... heat transfer pipe, 142 ... frame, 150 ... inlet side header, 152 ... distribution pipe, 154 ... collecting pipe, 156 ... transition pipe, 170 ... Heating part, 172 ... Heat transfer tube, 174 ... U-shaped tube, 176 ... Heating tube, 178 ... Outlet side header

Claims (11)

An apparatus for vaporizing liquefied natural gas,
The liquefied natural gas is passed inside, and includes a vaporization tube for vaporizing the liquefied natural gas by heat exchange between the liquefied natural gas and outside air, and a support member for supporting the vaporized tube,
The vaporizing pipe extends vertically and is formed of a plurality of main body pipe parts arranged in the horizontal direction and a vaporizing pipe meandering up and down by alternately connecting upper ends or lower ends of adjacent main body pipe parts. A plurality of connecting pipe parts to be constructed,
The main body tube portions adjacent to each other are connected to each other in an intermediate region corresponding to a height region of 30% or more and 70% or less of the total height of the vaporization tube. Relative displacement in the tube axis direction of the part is allowed,
The vaporizer for liquefied natural gas, wherein the vaporization pipe is connected to the support member in the intermediate region. In the liquefied natural gas vaporizer according to claim 1,
Each said main body pipe part has several fins as a fin extended along the pipe-axis direction, The fin of the adjacent main body pipe part is connected, The vaporizer of the liquefied natural gas characterized by the above-mentioned. The liquefied natural gas vaporizer according to claim 1 or 2,
The liquefied natural gas vaporization apparatus characterized in that both ends of the main body pipe portion in the arrangement direction of the vaporization pipe are connected to the support member. In the liquefied natural gas vaporizer according to claim 3,
A connecting member that connects the main body pipe portions adjacent to each other,
The liquefied natural gas vaporization apparatus according to claim 1, wherein the support member includes a beam member on which a connection member of an intermediate portion in the arrangement direction of the main body tube portions of the vaporization pipe among the connection members is placed. The liquefied natural gas vaporizer according to claim 4,
The connecting member placed on the beam member is composed of a pair of sliding members respectively provided in adjacent main body pipe portions across the beam member,
The pair of sliding members are configured to slide relative to each other in the arrangement direction by sliding on the beam members in the arrangement direction of the main body tube portions, respectively. Vaporizer. The liquefied natural gas vaporizer according to any one of claims 1 to 5,
Provided with a plurality of vaporization tubes as the vaporization tube,
These vaporizing tubes are arranged in a direction orthogonal to the arrangement direction in a posture in which the arrangement directions of the main body tube portions are parallel to each other, and the vaporization tubes are connected to the common support member in the intermediate region. A liquefied natural gas vaporizer. The liquefied natural gas vaporizer according to claim 6,
Provided with a plurality of spacers that are interposed between the main body tube portions of the vaporizing tubes adjacent to each other, and that allow the main body tube portions to be relatively displaced in the tube axis direction while restricting the approach between the main body tube portions. A liquefied natural gas vaporizer characterized by the above. The liquefied natural gas vaporizer according to claim 7,
In addition to being interposed between the main body tube portions of the vaporization tubes adjacent to each other, the spacer is also interposed between the main body tube portions of the common vaporization tube in a region deviating from the intermediate region. An apparatus for vaporizing liquefied natural gas, which restricts the approach of the main body tube portions while allowing the tube portions to be displaced relative to each other in the tube axis direction. The liquefied natural gas vaporizer according to claim 8,
In a region on the upper side and a region on the lower side outside the intermediate region of the vaporization tube, a spacer interposed between the main body tube portions of the vaporization tubes adjacent to each other, and between the main body tube portions of the common vaporization tube The liquefied natural gas vaporizer is characterized in that the intervening spacer is interposed at the same height. The liquefied natural gas vaporizer according to any one of claims 7 to 9,
Each of the spacers is fixed to one of the main body tube portions sandwiching the spacer, so that the other main body tube portion can slide in the tube axis direction with respect to the other main body tube portion. A device for vaporizing liquefied natural gas, wherein the vaporizer is in contact with the liquefied natural gas. The liquefied natural gas vaporizer according to any one of claims 1 to 10,
The support member is attached to the frame material surrounding the vaporizing tube and the main body tube portion of the vaporizing tube adjacent to the frame material, thereby suppressing horizontal vibration of the main body tube portion. A deflection suppressing member, and the deflection suppressing member has a structure capable of adjusting a distance from the frame member along a direction from the frame member toward a main body tube portion of a vaporization tube adjacent to the frame member. A liquefied natural gas vaporizer characterized by the above.

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