JP7404118B2 - Open rack vaporizer - Google Patents

Description

The present invention relates to an open rack type vaporizer.

An open rack type vaporizer is known that vaporizes liquefied gas using a heating liquid overflowing from a trough having a box structure that opens upward (see Patent Document 1). The vaporizer of Patent Document 1 includes a plurality of heat transfer panels configured to allow liquefied gas to flow upward therein, and a heating liquid having a higher temperature than the liquefied gas to flow down onto the outer surfaces of these heat transfer panels. It has a plurality of troughs configured. A manifold is arranged to distribute heating liquid to these troughs. In order to adjust the amount of heating liquid supplied to these troughs, a regulating valve is provided in the heating liquid supply path from the manifold to the plurality of troughs.

Heating liquid is supplied to the trough at a flow rate regulated by a regulating valve. When the supply of heating liquid exceeds the volume of the trough, the heating liquid overflows the trough through the upwardly directed open area and is supplied to the outer surface of the heat transfer panel. While the heating liquid flows down the outer surface of the heat transfer panel, the heating liquid imparts heat to the liquefied gas, causing the liquefied gas to vaporize.

Japanese Patent Application Publication No. 2017-150784

Although the above-mentioned vaporizer uses a regulating valve to adjust the amount of heating liquid supplied to the plurality of troughs, there is currently a need to reduce the maintenance of the regulating valve and the cost of the regulating valve. There is.

SUMMARY OF THE INVENTION An object of the present invention is to provide a vaporizer that allows adjustment of the amount of heating liquid flowing into a trough using an orifice plate.

The open rack type vaporizer according to one aspect of the present invention is configured to vaporize the liquefied gas by exchanging heat with a heating liquid having a higher temperature than the liquefied gas. The vaporizer has a plurality of heat transfer panels configured to allow liquefied gas to flow therein, and a box structure that opens upward, and also has an upward opening area where the liquefied gas flows in through an inlet formed in a peripheral wall. a plurality of troughs arranged to cause the heating liquid overflowing through the plurality of troughs to flow down to an outer surface of the plurality of heat transfer panels; and a manifold configured to distribute the heating liquid to the plurality of troughs. An orifice plate having an orifice hole through which the heating liquid flowing from the inflow port passes, and fixing the orifice plate to the peripheral wall so as to allow a change in the overlapping area of the inflow port and the orifice hole. The device includes a fixing portion whose position can be changed , and a regulating member provided below the inlet to regulate tilting of the orifice plate . The fixing portion is configured to be able to change the fixing position of the orifice plate relative to the peripheral wall in the width direction of the trough. The orifice plate is movable in the width direction of the trough along the regulating member with a lower edge of the orifice plate resting on the regulating member.

According to the above configuration, the orifice plate is used to adjust the flow rate to the trough, so maintenance labor and manufacturing costs are reduced. When the fixed position of the orifice plate with respect to the peripheral wall is changed, the overlapping area of the orifice hole with respect to the inlet changes. As a result, the resistance to the heating liquid flowing from the inlet changes. Specifically, the larger the overlapping area, the smaller the resistance to the heating liquid flowing from the inlet, and the larger the amount of heating liquid flowing into the trough. Conversely, if the overlapping area is small, the amount of heating liquid flowing into the trough will be small. Therefore, the amount of heating liquid flowing into the trough can be adjusted by this orifice plate. Furthermore, by changing the fixed position of the orifice plate for each trough, it is possible to change the amount of heated fluid flowing into each trough.

When the fixed position of the orifice plate is changed in the width direction, the width dimension of the opening where the inlet and the orifice hole overlap changes. Since the relative position of the orifice hole to the inlet can be changed in the width direction of the trough , the overlapping area between the inlet and the orifice hole (and thus the resistance to the heating liquid flowing into the trough) can be changed using the orifice plate. can do. Furthermore, since the tilting of the orifice plate is regulated by the regulating member, it is possible to change the position of the orifice plate without tilting the orifice plate.

An open rack type vaporizer according to another aspect of the present invention is configured to vaporize the liquefied gas by exchanging heat with a heating liquid having a higher temperature than the liquefied gas. The vaporizer has a plurality of heat transfer panels configured to allow liquefied gas to flow therein, and a box structure that opens upward, and also has an upward opening area where the liquefied gas flows in through an inlet formed in a peripheral wall. a plurality of troughs arranged to cause the heating liquid overflowing through the plurality of troughs to flow down to an outer surface of the plurality of heat transfer panels; and a manifold configured to distribute the heating liquid to the plurality of troughs. An orifice plate having an orifice hole through which the heating liquid flowing from the inflow port passes, and fixing the orifice plate to the peripheral wall so as to allow a change in the overlapping area of the inflow port and the orifice hole. A fixed part configured to be able to change its position. A plurality of positioning holes are formed in the peripheral wall at different positions. The fixing portion includes an insertion member configured to be inserted into each of the plurality of positioning holes. The orifice plate is configured to be supported by the insertion member.

According to the above configuration, when the positioning hole through which the insertion member is inserted is changed from one of the plurality of positioning holes to another one of the plurality of positioning holes, the position of the insertion member in the peripheral wall is changed. Since the orifice plate is supported by the insertion member, changing the position of the insertion member changes the position of the orifice plate on the peripheral wall. As a result, the relative position of the orifice hole with respect to the inlet also changes, and the overlapping area of the inlet and the orifice hole (and thus the resistance to the heating liquid flowing into the trough) can be changed by the orifice plate.

Regarding the above configuration, a communication hole may be formed in the peripheral wall to communicate one of the plurality of positioning holes with another positioning hole.

According to the above configuration, the fixing position of the orifice plate relative to the peripheral wall can be changed by moving the insertion member connected to one positioning hole to another positioning hole through the communication hole. At this time, since there is no need to remove the insertion member from the orifice plate and the peripheral wall, loss of the insertion member can be prevented.

Regarding the above configuration, the vaporizer is held in a state of being spaced apart from the peripheral wall at a position facing a region of the peripheral wall that includes the plurality of positioning holes, and is formed corresponding to the plurality of positioning holes. The device may further include a perforated plate in which a plurality of support holes are formed. The orifice plate may be disposed between the peripheral wall and the aperture plate. The orifice plate may have an insertion opening that allows the insertion member to pass therethrough. The insertion member may support the orifice plate by being inserted into a support hole and an insertion opening corresponding to one of the plurality of positioning holes.

According to the above configuration, when the insertion member is inserted into the positioning hole and the support hole corresponding to the positioning hole, the insertion member is supported on both sides by the peripheral wall and the aperture plate. The orifice plate is supported between the peripheral wall and the aperture plate by the insertion member supported on both sides.

Regarding the above configuration, the vaporizer may further include a cover member attached to the outer surface of the peripheral wall so as to cover the plurality of positioning holes.

According to the above configuration, the plurality of positioning holes in the peripheral wall are covered by the cover member, so that the heating liquid supplied to the trough is prevented from leaking through these positioning holes.

An open rack type vaporizer according to another aspect of the present invention is configured to vaporize the liquefied gas by exchanging heat with a heating liquid having a higher temperature than the liquefied gas. The vaporizer has a plurality of heat transfer panels configured to allow liquefied gas to flow therein, and a box structure that opens upward, and also has an upward opening area where the liquefied gas flows in through an inlet formed in a peripheral wall. a plurality of troughs arranged to cause the heating liquid overflowing through the plurality of troughs to flow down to an outer surface of the plurality of heat transfer panels; and a manifold configured to distribute the heating liquid to the plurality of troughs. An orifice plate having an orifice hole through which the heating liquid flowing from the inflow port passes, and fixing the orifice plate to the peripheral wall so as to allow a change in the overlapping area of the inflow port and the orifice hole. The device includes a fixing portion whose position can be changed, and a pair of regulating members arranged on the peripheral wall so as to sandwich the inflow port from side to side and extending in the vertical direction . The orifice plate is vertically displaceable between the pair of restriction members along the pair of restriction members, and when the orifice plate is displaced in the vertical direction, the pair of restriction members Tilting of the orifice plate in a direction away from the peripheral wall and in a direction along the peripheral wall is restricted .

According to the above configuration, since the tilting of the orifice plate is regulated by the regulating member, it is possible to change the position of the orifice plate without tilting the orifice plate.

Regarding the above configuration, the fixing portion may be configured to press the orifice plate against the peripheral wall.

According to the above configuration, the orifice plate is pressed against the peripheral wall by the fixing portion, so even if a portion of the heating liquid that has flowed in from the inlet collides with the orifice plate, the orifice plate is difficult to separate from the peripheral wall. Therefore, the heating liquid is prevented from flowing into the boundary between the orifice plate and the peripheral wall.

The vaporizer described above allows the amount of heating liquid flowing into the trough to be adjusted by means of an orifice plate.

FIG. 1 is a schematic perspective view of an open rack type vaporizer according to a first embodiment. FIG. 2 is a schematic cross-sectional view of a vaporization device. 1 is a schematic cross-sectional view of a trough of a vaporizer; FIG. FIG. 2 is a schematic side view of a trough; FIG. 3 is a schematic diagram of an orifice plate used to adjust the amount of heating liquid flowing into the trough. It is a schematic diagram of the fixing part used for fixing an orifice plate. It is a schematic diagram of the fixing part used for fixing an orifice plate. FIG. 3 is a schematic cross-sectional view of a regulating member attached to a side plate. FIG. 2 is a schematic diagram of the positional relationship between an orifice hole, an inlet, and an insertion opening. FIG. 2 is a schematic diagram of the positional relationship between an orifice hole, an inlet, and an insertion opening. It is a schematic diagram of a side plate. FIG. 3 is a schematic diagram of another example of an orifice plate. FIG. 3 is a schematic diagram of another example of an orifice plate. It is a schematic diagram of the positioning hole of a 2nd embodiment.

<First embodiment>
FIG. 1 is a schematic perspective view of an open rack vaporizer (ORV) 100. FIG. 2 is a schematic vertical cross-sectional view of the vaporizer 100. A vaporizer 100 will be described with reference to FIGS. 1 and 2.

The vaporizer 100 is configured to exchange heat between liquefied natural gas (hereinafter referred to as "liquefied gas") with a heating liquid having a higher temperature than the liquefied gas, and vaporize the liquefied gas. The gaseous natural gas obtained as a result of the heat exchange is referred to as "vaporized gas" in the following description. In this embodiment, seawater is used as the heating liquid. Alternatively, a liquid having a higher temperature than the vaporized gas may be utilized as the heating liquid.

The vaporizer 100 includes a plurality of heat transfer panels 113 on which the above-described heat exchange occurs, and a plurality of troughs 130 configured to supply heating liquid to the outer surfaces of these heat transfer panels 113. The vaporizer 100 further includes a lower manifold 111 configured to distribute liquefied gas to these heat transfer panels 113 and an upper manifold 112 into which the vaporized gas generated within these heat transfer panels 113 flows. There is. The vaporizer 100 further includes a pump 121, a manifold 122, and a plurality of supply pipes 123, which are used to supply heating liquid to the trough 130 described above.

The plurality of heat transfer panels 113 are arranged in an upright position and are arranged at intervals. Each of these heat transfer panels 113 has a lower header tube 114, an upper header tube 115, and a plurality of heat transfer tubes 116. The lower header pipe 114 and the upper header pipe 115 extend in a direction substantially perpendicular to the direction in which the heat transfer panels 113 are aligned. The upper header pipe 115 is arranged at a position spaced upward from the lower header pipe 114 and forms the upper end of the heat transfer panel 113. On the other hand, the lower header pipe 114 forms the lower edge of the heat transfer panel 113. The plurality of heat exchanger tubes 116 are arranged in an upright position and are aligned in the extending direction of the lower header tube 114 and the upper header tube 115. These heat transfer tubes 116 extend upward from the lower header tube 114 and are connected to the upper header tube 115.

The lower manifold 111 extends in the direction in which the heat transfer panels 113 are aligned. One end of a lower header pipe 114 is connected to a plurality of outlet ports (not shown) formed on the circumferential surface of the lower manifold 111 . The lower manifold 111 is also connected to a pump (not shown) that supplies liquefied gas.

The upper manifold 112 is spaced upward from the lower manifold 111 and extends in the direction in which the heat transfer panels 113 are aligned. One end of the upper header pipe 115 is connected to a plurality of inflow ports (not shown) formed on the circumferential surface of the upper manifold 112 . The upper manifold 112 is also connected to a predetermined consumer that uses the vaporized gas or a tank that stores the vaporized gas (not shown).

Pump 121 is configured to supply heating liquid. Pump 121 is connected to an inlet of manifold 122 via a conduit (not shown).

The manifold 122 extends in the direction in which the heat transfer panels 113 are aligned. A plurality of outlet ports 125 are formed on the circumferential surface of the manifold 122 . These outflow ports 125 are formed at intervals in the extending direction of the manifold 122. Base ends of a plurality of supply pipes 123 are connected to these outlet ports 125 . These supply pipes 123 extend from the outlet 125 toward the troughs 130, and the tips of these supply pipes 123 are connected to the plurality of troughs 130.

A schematic cross-sectional view of one of these troughs 130 is shown in FIG. FIG. 4 is a schematic side view of the trough 130. Trough 130 will be described with reference to FIGS. 1-4.

The plurality of troughs 130 are arranged at intervals in the alignment direction of the heat transfer panels 113, and are lined up alternately with the heat transfer panels 113. Regarding the height positions of these troughs 130, the troughs 130 are arranged at a lower position than the upper header pipe 115. Specifically, the trough 130 is adjacent to the upper part of the plurality of heat transfer tubes 116 of the heat transfer panel 113 (above the intermediate position of the plurality of heat transfer tubes 116 in the height direction) in the alignment direction of the heat transfer panel 113. It is arranged like this. The trough 130 is located at a higher position than the manifold 122 in which the outlet 125 is formed.

Each of the plurality of troughs 130 includes an upwardly opened box 131 and a guide portion 139 provided to guide the heating liquid overflowing from the box 131 to the heat transfer panel 113.

The box body 131 has a box structure that is long in the direction in which the heat exchanger tubes 116 are aligned. Specifically, the box 131 includes a substantially rectangular bottom plate 132 that is long in the direction in which the heat exchanger tubes 116 are aligned, and a peripheral wall 133 that stands up from the periphery of the bottom plate 132. The bottom plate 132 is in a substantially horizontal position, while the peripheral wall 133 is in a substantially vertical position. The length of the box 131 (that is, the size of the box 131 in the alignment direction of the heat transfer tubes 116) is greater than the distance between the heat transfer tubes 116 at both ends of the heat transfer panel 113.

The peripheral wall 133 includes a side plate 136 erected on the manifold 122 side, and another side plate 137 erected at a position spaced apart from the side plate 136 in the alignment direction of the heat transfer tubes 116 . A substantially circular inlet 138 to which the tip of the supply pipe 123 is connected is formed in the side plate 136 . The center of the inflow port 138 is located at the lower part of the side plate 136 (that is, below the center position of the side plate 136 in the height direction). In the following description, the direction from the side plate 136 to the side plate 137 is referred to as the "inflow direction."

In addition to the inlet 138, the side plate 136 has a plurality of substantially circular positioning holes 151 formed above the inlet 138. These locating holes 151 are connected to a single orifice plate 160 (orifice plate 160 is shown in FIG. ) is used to change the fixed position in the height direction.

Specifically, in FIG. 4, nine positioning holes 151 are formed in the side plate 136. Three of these positioning holes 151 are arranged at intervals in the vertical direction and form a hole row. The other three positioning holes 151 are arranged at different positions in the width direction from this hole row at intervals in the vertical direction, and form another hole row. The remaining three positioning holes 151 are arranged at different positions in the width direction from these hole rows and spaced apart from each other in the vertical direction, and form another hole row. The height positions of these nine positioning holes 151 are all different from each other. By forming a plurality of hole rows at different positions in the width direction, it becomes possible to provide a large number of positioning holes 151 having different height positions. As a result, it becomes possible to set many fixing points on the orifice plate 160 and to finely adjust the height position of the orifice plate 160.

The peripheral wall 133 further includes a pair of weir plates 134 and 135 extending in the inflow direction from the side plate 136 in an upright position. Both end edges (that is, edges extending in the height direction) of the weir plates 134 and 135 in the inflow direction are connected to side plates 136 and 137. That is, the weir plates 134 and 135 face each other in a direction perpendicular to the inflow direction. In the following description, the direction perpendicular to the inflow direction is referred to as the "width direction."

The heights of the weir plates 134 and 135 of the trough 130 arranged between adjacent heat transfer panels 113 are lower than or substantially equal to the heights of the side plates 136 and 137.

The guide portion 139 is a plate-shaped portion that slopes diagonally downward from the upper edges of the weir plates 134 and 135. The trough 130 disposed between adjacent heat transfer panels 113 has two guide portions 139 . The trough 130 located outside the row of heat transfer panels 113 has one guide 139 . This guide portion 139 is provided so as to be inclined diagonally downward from the upper edge of the weir plate facing the heat transfer panel 113.

The orifice plate 160 described above is used to adjust the resistance to the heating liquid flowing into the trough 130 (ie, the amount of heating liquid flowing into the trough 130). A schematic diagram of orifice plate 160 is shown in FIG. With reference to FIGS. 3-5, orifice plate 160 will be described.

The orifice plate 160 is arranged in an upright position adjacent to the inner surface of the side plate 136. The orifice plate 160 includes an aperture plate portion 161 whose upper end is bent and a handle 162 attached to the bent portion of the upper end of the aperture plate portion 161 . The handle 162 is provided to facilitate adjustment work for adjusting the mounting position of the orifice plate 160 with respect to the trough 130.

The width of the opening plate portion 161 is smaller than the distance between the inner surfaces of the weir plates 134 and 135. The height of the opening plate part 161 is greater than the height of the side plates 136 and 137, and the upper part of the opening plate part 161 and the handle 162 are located above the internal space of the trough 130.

The aperture plate portion 161 is formed with a substantially circular orifice hole 163 and an insertion opening 164 that is long in the width direction. The insertion opening 164 is formed at a position spaced upward from the orifice hole 163. The height positions of the orifice hole 163 and the insertion opening 164 are such that when the insertion opening 164 is overlapped with a region including any of the positioning holes 151 of the side plate 136, the orifice hole 163 is at least partially aligned with the inlet 138 of the side plate 136. are set to overlap.

Orifice hole 163 may have a diameter equal to inlet 138, a larger diameter than inlet 138, or a smaller diameter than inlet 138. In this embodiment, orifice hole 163 has approximately the same diameter as inlet 138 . FIG. 3 shows a state in which the orifice hole 163 is arranged approximately coaxially with the inlet 138.

The opening length of the insertion opening 164 (that is, the size of the insertion opening 164 in the width direction) is longer than the size in the vertical direction. That is, the insertion opening 164 extends in the direction in which the three rows of positioning holes 151 are lined up. The insertion opening 164 has a value larger than the distance between the rows of positioning holes 151 that are farthest apart in the width direction (that is, the distance between the rows at both ends).

A fixing portion 170 is provided on the side plate 136 to fix the orifice plate 160 to the side plate 136 at a predetermined position. A schematic diagram of the fixing part 170 is shown in FIGS. 6 and 7. The fixing portion 170 will be explained with reference to FIGS. 3 to 7.

The fixing portion 170 includes a rod-shaped support portion 173 (see FIGS. 6 and 7) bent in a substantially C-shape in plan view, and an insertion member 172 (see FIG. 7).

The height position of the support portion 173 is set such that the perforated plate 174 overlaps a region of the side plate 136 including the plurality of positioning holes 151 in the inflow direction. The support portion 173 is located below the plurality of positioning holes 151 of the side plate 136 and above the inlet 138.

The support portion 173 includes a main portion 175 that extends in the width direction at a position spaced from the inner surface of the side plate 136, and end portions 176 and 177 that protrude from both ends of the main portion 175 toward the inner surface of the side plate 136. There is. The main portion 175 is longer than the width of the orifice plate 160 in the width direction of the main portion 175 . A plurality of screw holes 178 are formed in the main portion 175 at intervals in the longitudinal direction. These screw holes 178 pass through the main portion 175 in the inflow direction.

The ends 176 and 177 are fixed to the inner surface of the side plate 136. The amount of protrusion of the end portions 176 and 177 from the main portion 175 is greater than the thickness of the orifice plate 160. An orifice plate 160 is inserted into a rectangular region (see FIG. 6) surrounded by the end portions 176, 177, the inner surface of the side plate 136, and the main portion 175 (see FIG. 3).

The insertion member 172 may be a pin having a diameter less than or equal to the positioning hole 151 and the support hole 179 of the side plate 136. The insertion member 172 is configured to be inserted into a support hole 179 formed in a rectangular aperture plate 174 supported by a support portion 173. The insertion member 172 has sufficient strength to support the orifice plate 160.

The perforated plate 174 projects upward from the main portion 175. The support hole 179 of the perforated plate 174 is formed to correspond to the positioning hole 151 of the side plate 136. That is, nine support holes 179 are formed in the perforated plate 174 and are approximately coaxial with and have approximately the same diameter as the positioning hole 151 of the side plate 136 . The end of the above-mentioned insertion member 172 is inserted into one of these support holes 179. At this time, one end of the insertion member 172 is located in one of the plurality of support holes 179, and the other end of the insertion member 172 is located in the positioning hole 151 that is approximately coaxial with the support hole 179. . Therefore, the insertion member 172 is supported on both sides by the perforated plate 174 and the side plate 136. The insertion member 172 passes through the insertion opening 164 of the orifice plate 160 between the support hole 179 and the positioning hole 151 . The insertion member 172 shown in FIG. 3 is inserted into the support hole 179 and the positioning hole 151 located at the lowest position. At this time, the orifice hole 163 is substantially coaxial with the inlet 138 and completely overlaps with the inlet 138.

In order to suppress the heating liquid from flowing into the boundary between the orifice plate 160 and the inner surface of the side plate 136, a plurality of pressing members 180 configured to press the orifice plate 160 against the side plate 136 are used. (See Figure 3). Specifically, the pressing member 180 is configured using a bolt that is screwed into a screw hole 178 of the main portion 175.

The heating liquid that has flowed into the trough 130 can flow out through the positioning hole 151. Therefore, in order to catch the heating liquid flowing out through the positioning hole 151, a rectangular box-shaped cover member 181 is attached to the outer surface of the side plate 136. The cover member 181 is formed and arranged so as to cover all of the plurality of positioning holes 151.

A regulating member 191 that regulates displacement of the orifice plate 160 is provided on the inner surface of the side plate 136 (see FIGS. 4 and 8). The regulating member 191 is configured to prevent the orifice plate 160 from separating from the side plate 136 and from tilting along the side plate 136. Specifically, the regulating member 191 includes a pair of extending portions 192 that extend in the vertical direction and are fixed to the side plate 136, and a projecting portion 193 that projects laterally from these extending portions 192. It is a member having a substantially L-shaped cross section. The pair of extended portions 192 are arranged to sandwich the inlet 138 at an interval corresponding to the width of the orifice plate 160. The pair of overhanging portions 193 overhang the orifice plate 160 in the inflow direction and extend toward each other.

The operation of vaporizer 100 will be described below.

The liquefied gas flows into the lower header pipes 114 of each of the plurality of heat transfer panels 113 via the lower manifold 111 by a pump (not shown). The liquefied gas that has entered the lower header pipe 114 flows upward along the plurality of heat transfer tubes 116. During this time, the liquefied gas exchanges heat with the heating liquid and becomes a vaporized gas. The vaporized gas flows upward into the upper header pipe 115 . Thereafter, the vaporized gas flows through the upper header pipe 115 and is concentrated in the upper manifold 112.

The heating liquid is distributed by a pump 121 through a manifold 122 to a plurality of supply tubes 123 . The heating liquid that has flowed through the supply pipe 123 flows into a plurality of troughs 130 . The heating liquid that has flowed into the trough 130 forms a liquid layer within the internal space of the box body 131. When the amount of heating liquid flowing into the box 131 exceeds the volume of the box 131, the heating liquid overflows over the upper edges of the weir plates 134 and 135. The heating liquid then flows down along the inclined surface of the guide section 139. As a result, the heating liquid is sprayed onto the outer surfaces of the upper portions of the plurality of heat transfer tubes 116 located next to the box body 131.

A portion of the heating liquid that has flowed into the box body 131 flows out through the plurality of positioning holes 151 of the side plate 136. The heating liquid flowing out through these positioning holes 151 is received by a cover member 181 attached to the outer surface of the side plate 136 and is retained in a space surrounded by the cover member 181 and the outer surface of the side plate 136.

The amount of heating liquid flowing into the trough 130 is adjusted by changing the height position of the orifice plate 160. A method of adjusting the inflow amount of the heating liquid will be explained with reference to FIGS. 1, 3, 7, 9, and 10. FIG. 9 is a schematic diagram of the positional relationship between the orifice hole 163, the inlet 138, and the insertion opening 164 when the orifice plate 160 is arranged at the height position shown in FIG. FIG. 10 is a schematic diagram of the positional relationship between the orifice hole 163, the inlet 138, and the insertion opening 164 when the orifice plate 160 is positioned at a height higher than that shown in FIG. In FIGS. 9 and 10, the orifice hole 163 and the insertion opening 164 are shown by dotted lines.

When the orifice plate 160 is arranged at the height position shown in FIGS. 3 and 9, the insertion member 172 is inserted into the insertion opening 164, the lowermost positioning hole 151 of the side plate 136, and the aperture plate 174. The support hole 179 is inserted through the lowermost support hole 179 . At this time, the orifice hole 163 substantially completely overlaps the inlet 138. That is, the orifice plate 160 is positioned at a position where the orifice hole 163 is substantially coaxial with the inlet 138, and the inlet 138 is in the most open state.

The pressing member 180 and the insertion member 172 are removed from the orifice plate 160 in the height position shown in FIGS. 3 and 9. As a result, orifice plate 160 is movable along the inner surface of side plate 136. An operator can hold the handle 162 and pull up the orifice plate 160. At this time, since the orifice plate 160 is sandwiched between the pair of extension parts 192, it can move straight upward without tilting.

When the orifice plate 160 is pulled up, the insertion opening 164 overlaps the upper positioning hole 151 and the upper support hole 179. Specifically, since the insertion opening 164 extends in the width direction, it is different from the positioning hole 151 used for fixing the orifice plate 160 at the height position shown in FIGS. 3 and 9 in the width direction. It may also overlap with positioning holes 151 formed at different positions. Therefore, the orifice plate 160 can be pulled up and the insertion opening 164 can be placed over any of the nine positioning holes 151. Note that FIG. 10 shows a state in which the insertion opening 164 overlaps the uppermost positioning hole 151 among the plurality of positioning holes 151.

After the orifice plate 160 is pulled up, the insertion member 172 is inserted into the insertion opening 164 , the upper positioning hole 151 that overlaps the insertion opening 164 , and the upper support hole 179 . It is supported. Orifice plate 160 is supported by insertion member 172 between side plate 136 and aperture plate 174 .

When the insertion member 172 is inserted into the positioning hole 151 and the support hole 179 that are formed at a position apart from the center position of the orifice plate 160 in the width direction, the moment around the insertion member 172 is transferred to the orifice due to the weight of the orifice plate 160. Acting on plate 160. Although the orifice plate 160 tends to tilt around the insertion member 172 in response to this moment, the tilting of the orifice plate 160 is restricted by the extension portion 192.

After the insertion member 172 is inserted into the insertion opening 164, the positioning hole 151, and the support hole 179, the pressing member 180 is screwed into the screw hole 178 of the support portion 173, and the orifice plate 160 is inserted between the tip of the pressing member 180 and the side plate. 136 and the inner surface thereof. That is, the orifice plate 160 is pressed against the inner surface of the side plate 136 by the pressing member 180.

When the insertion member 172 is inserted into the upper positioning hole 151 and the upper support hole 179 at the height position shown in FIG. positioned. In this case, an overlapping state in which the orifice hole 163 partially overlaps the inlet 138 is obtained. That is, the overlapping area 169 of the orifice hole 163 and the inlet 138 (i.e., the open area of the inlet 138) changes the positioning height of the orifice plate 160 from the position shown in FIGS. 3 and 9 to the position shown in FIG. This can be reduced by changing the height position.

The smaller the overlapping area 169 of the orifice hole 163 and the inlet 138, the greater the resistance to the heating liquid flowing into the trough 130. Therefore, by changing the positioning height of orifice plate 160 from the position shown in FIGS. 3 and 9 to the height position shown in FIG. The amount of inflow can be reduced.

When the amount of heating liquid flowing into the trough 130 is reduced, the amount of heating liquid flowing into the other troughs 130 increases. That is, since the plurality of troughs 130 receive heating liquid through the common manifold 122, if it becomes difficult for the heating liquid to flow into one trough 130, the amount of heating liquid flowing into the other troughs 130 will decrease. increase. Conversely, if it becomes easier for the heating liquid to flow into one trough 130, the amount of heating liquid flowing into the other troughs 130 will decrease. Therefore, by changing the height position of the orifice plate 160 for one trough 130, the amount of heating liquid flowing into the other troughs 130 can be changed.

When orifice hole 163 partially overlaps inlet 138 , a portion of orifice plate 160 is exposed within inlet 138 . When the heating liquid impinges on the exposed portion of orifice plate 160 within inlet 138, the lower portion of orifice plate 160 is subjected to a force in the direction of inflow. Although this force acts to separate the lower part of the orifice plate 160 from the inner surface of the side plate 136, the separation of the orifice plate 160 from the inner surface of the side plate 136 is restricted by the overhang 193.

A portion of the heating liquid that impinges on the exposed portion of orifice plate 160 within inlet 138 may flow between the inner surface of side plate 136 and orifice plate 160 . Since the orifice plate 160 is pressed against the side plate 136 by the pressing member 180 above the inlet 138, the heating liquid that has flowed between the inner surface of the side plate 136 and the orifice plate 160 exceeds the pressing position of the pressing member 180. The upward flow is suppressed.

According to the embodiments described above, by changing the positioning height of orifice plate 160, the amount of heating liquid flowing into trough 130 can be changed. Since various inflow rates can be achieved using one orifice plate 160, it is not necessary to prepare a large number of orifice plates 160 with different sizes of orifice holes 163.

With respect to the embodiments described above, orifice hole 163 has approximately the same size as inlet 138 . Alternatively, the orifice hole 163 may be smaller or larger than the inlet 138 if the overlapping area 169 of the orifice hole 163 and the inlet 138 can be changed within the range in which the orifice plate 160 can be positioned. Good too.

Regarding the embodiment described above, nine positioning holes 151 are formed in the side plate 136. Alternatively, two or more positioning holes 151 may be formed in the side plate 136 at different positions in the height direction. If two or more positioning holes 151 are formed in the side plate 136, the fixed position of the orifice plate 160 can be changed in the height direction to achieve different inflow rates to the trough 130.

With respect to the embodiments described above, the position of the orifice plate 160 has been varied in the height direction. Alternatively, the position of orifice plate 160 may be changed in the width direction. A structure that allows the position of the orifice plate 160 in the width direction to be changed will be described with reference to FIGS. 11 and 12. FIG. 11 is a schematic diagram of the side plate 136. FIG. 12 is a schematic diagram of orifice plate 160.

The side plate 136 of FIG. 11 is wider than the side plate 136 shown in FIG. 4, while the inlet 138 of the side plate 136 has the same size as the inlet 138 of the side plate 136 of FIG. . That is, the ratio of the diameter of the inlet 138 to the width of the side plate 136 is smaller in FIG. 11 than in FIG. 4.

Nine positioning holes 151 are formed above the inlet 138. The positions of these positioning holes 151 in the width direction and height direction are different from each other. Specifically, three of these positioning holes 151 are arranged at intervals in the width direction and form a hole row. The other three positioning holes 151 are arranged at different positions in the vertical direction from this hole row and spaced apart from each other in the width direction, and form another hole row. The remaining three positioning holes 151 are arranged at different positions in the vertical direction from these hole rows and spaced apart in the width direction, and form another hole row. Nine support holes 179 are formed in the perforated plate 174 in accordance with the formation pattern of the positioning holes 151 in the side plate 136 (not shown). That is, the nine support holes 179 of the perforated plate 174 are formed substantially coaxially with the positioning holes 151 of the side plate 136.

One regulating member 191 is attached below the inlet 138 . Specifically, the regulating member 191 is attached to the inner surface of the side plate 136 so that the longitudinal direction of the regulating member 191 is in the horizontal direction. The projecting portion 193 of the regulating member 191 projects upward with respect to the extending portion 192.

Orifice plate 160 in FIG. 12 has the same width as orifice plate 160 in FIG. Since the width of the orifice plate 160 is maintained while the width of the side plate 136 is increased, the orifice plate 160 of FIG. 12 can be moved relatively widely in the width direction.

The orifice plate 160 of FIG. 12 differs from the orifice plate 160 of FIG. 5 in the orientation of the insertion opening 164. Specifically, the insertion opening 164 of the orifice plate 160 in FIG. 5 is horizontally long, whereas the insertion opening 164 of the orifice plate 160 in FIG. 12 is vertically long. That is, the insertion opening 164 extends in the direction in which the positioning holes 151 are lined up.

The orifice plate 160 is attached to the side plate 136 with the lower edge of the orifice plate 160 resting on the upper surface of the extension portion 192. The orifice plate 160 is movable along the regulating member 191. After the orifice plate 160 is placed in a position where one of the nine positioning holes 151 is completely exposed in the insertion opening 164, the insertion member 172 is inserted into the insertion opening 164, the exposed positioning hole 151, and the positioning hole coaxial with the positioning hole 151. It is inserted into the support hole 179. Thereafter, the orifice plate 160 is pressed against the inner surface of the side plate 136 by the pressing member 180.

Since the formation positions of the nine positioning holes 151 on the side plate 136 (and the nine support holes 179 of the apertured plate 174) are different from each other in the width direction, the orifice plate 160 is formed at nine different positions in the width direction. can be positioned at. When the widthwise position of the orifice plate 160 is changed, the position of the orifice hole 163 of the orifice plate 160 relative to the inlet 138 of the side plate 136 also changes. As a result, the overlapping area 169 of the inlet 138 and the orifice hole 163 (and thus the resistance to the heating liquid flowing into the trough 130) changes.

If the orifice plate 160 is configured to be movable in the width direction, the positioning operation for the orifice plate 160 can be performed while the orifice plate 160 is supported by the regulating member 191.

Regarding the embodiments described above, the insertion member 172 is formed separately from the orifice plate 160. Alternatively, the insertion member 172 may be integrally formed with the orifice plate 160 (see FIG. 13).

The insertion member 172 formed integrally with the orifice plate 160 is inserted into the nine positioning holes 151 formed in the side plate 136, thereby positioning the orifice plate 160 at a predetermined height position. Thereafter, the pressing member 180 is screwed into the screw hole 178 and the orifice plate 160 is pressed against the inner surface of the side plate 136, thereby fixing the orifice plate 160 to the side plate 136.

<Second embodiment>
In the first embodiment, the insertion member 172 needs to be pulled out from the positioning hole 151, the insertion opening 164, and the support hole 179 in order to change the position of the orifice plate 160 (see FIG. 5). In this case, the operator may lose the insertion member 172 during the positioning work of the orifice plate 160. A technique for solving such problems will be explained in a second embodiment.

In FIG. 14, five positioning holes 151 formed in the side plate 136 are shown at different height positions. These positioning holes 151 are formed at different positions in the width direction. The distance between the positioning holes 151 at both ends in the width direction (the distance in the width direction) is set shorter than the opening length of the insertion opening 164 shown in FIG.

A communication hole 210 is further formed that connects the positioning holes 151 adjacent in the width direction. The communication hole 210 has vertical portions 211 to 215 extending upward from the five positioning holes 151 and horizontal portions 221 to 224 extending in the horizontal direction so as to connect the vertical portions 211 to 215 adjacent in the width direction. have.

The opening area shown in FIG. 14 (namely, the positioning hole 151 and the communication hole 210) is also formed in the aperture plate 174. This open area is used in place of the support hole 179 shown in FIG.

When the height of the orifice plate 160 is set at a height where the insertion opening 164 overlaps in a cross shape with any of the vertical portions 211 to 215, the insertion member 172 is inserted into the side plate 136, the orifice plate 160, and the aperture plate 174. It becomes possible to insert it. When the orifice plate 160 is lowered with the insertion member 172 inserted therethrough, the lowering of the orifice plate 160 is stopped at the positioning hole 151 of the insertion member 172 . That is, the orifice plate 160 is positioned at the position where the insertion member 172 reaches the positioning hole 151.

When changing the insertion position of the insertion member 172 to the adjacent positioning hole 151, the orifice plate 160 is pulled up to a height position where the insertion opening 164 overlaps the horizontal portion of the communication hole 210 connected to the adjacent positioning hole 151. At this time, the insertion member 172 moves upward along a vertical portion extending upward from the original positioning hole 151. Thereafter, the insertion member 172 is moved in the width direction along the horizontal portions of the insertion opening 164 and the communication hole 210, which are overlapped with each other. As a result, the insertion member 172 reaches the adjacent positioning hole 151.

After that, when the orifice plate 160 is lowered, the insertion member 172 is caught in the adjacent positioning hole 151, and the lowering of the orifice plate 160 is stopped. That is, the orifice plate 160 is positioned at the position where it reaches the adjacent positioning hole 151. Since the height positions of adjacent positioning holes 151 are different from each other, the positioning height of orifice plate 160 changes depending on which of the five positioning holes 151 is used for positioning orifice plate 160. As a result, the overlapping area 169 of the orifice hole 163 with respect to the inlet 138 (and thus the resistance to the heating liquid flowing into the trough 130) also changes.

As described above, the positioning height of the orifice plate 160 can be changed while the insertion member 172 is inserted through the opening area of the insertion opening 164, the aperture plate 174, and the side plate 136. Therefore, loss of the insertion member 172 during the operation of changing the positioning height of the orifice plate 160 is prevented.

In the embodiment described above, the orifice plate 160 shown in FIG. 5 is positioned on the side plate 136. Alternatively, orifice plate 160 shown in FIG. 13 may be positioned on side plate 136. In the orifice plate 160 of FIG. 13, since the insertion member 172 is integrated with the orifice plate 160, loss of the insertion member 172 can be reliably prevented.

The techniques described in connection with the above embodiments are suitably used in various technical fields where a phase change from liquefied gas to vaporized gas is required.

100......... Vaporizer 113... Heat transfer panel 122...... ...Manifold 130...Trough 133......Peripheral wall 138... ......Inflow port 151......Positioning hole 160......Orifice plate 163... ...... Orifice hole 169 ...... Overlapping area 170 ...... Fixed part 172 ... .........Insert member 174......Perforated plate 179...Support Hole 181...Cover member 191...Regulation member 210... ...Communication hole

Claims (7)

An open rack type vaporizer that vaporizes the liquefied gas by exchanging heat with a heating liquid having a higher temperature than the liquefied gas,
a plurality of heat transfer panels configured to allow liquefied gas to flow therethrough;
The heating liquid has a box structure that opens upward, and is configured to cause the heating liquid that flows in through an inlet formed in the peripheral wall and overflows through the upward opening area to flow down onto the outer surface of the plurality of heat transfer panels. multiple troughs arranged,
a manifold configured to distribute the heating liquid to the plurality of troughs;
an orifice plate formed with an orifice hole through which the heating liquid flowing from the inflow port passes;
a fixing part configured to be able to change the fixing position of the orifice plate with respect to the peripheral wall so as to allow a change in the overlapping area of the inflow port and the orifice hole;
a regulating member provided below the inflow port to regulate tilting of the orifice plate;
The fixing part is configured to be able to change the fixing position of the orifice plate with respect to the peripheral wall in the width direction of the trough,
In the vaporizer, the orifice plate is movable in the width direction of the trough along the regulating member with a lower edge of the orifice plate resting on the regulating member . An open rack type vaporizer that vaporizes the liquefied gas by exchanging heat with a heating liquid having a higher temperature than the liquefied gas,
a plurality of heat transfer panels configured to allow liquefied gas to flow therein;
The heating liquid has a box structure that opens upward, and is configured to cause the heating liquid that flows in through an inlet formed in the peripheral wall and overflows through the upward opening area to flow down onto the outer surface of the plurality of heat transfer panels. multiple troughs arranged,
a manifold configured to distribute the heating liquid to the plurality of troughs;
an orifice plate formed with an orifice hole through which the heating liquid flowing from the inflow port passes;
a fixing part configured to be able to change the fixing position of the orifice plate with respect to the peripheral wall so as to allow a change in the overlapping area of the inflow port and the orifice hole;
A plurality of positioning holes are formed in the peripheral wall at different positions,
The fixing part includes an insertion member configured to be inserted into each of the plurality of positioning holes,
The orifice plate is configured to be supported by the insertion member. 3. The vaporizer according to claim 2 , wherein the peripheral wall has a communication hole formed therein that communicates one of the plurality of positioning holes with another positioning hole. An opening that is held apart from the peripheral wall at a position facing a region of the peripheral wall that includes the plurality of positioning holes, and has a plurality of support holes formed corresponding to the plurality of positioning holes. Further comprising a hole plate,
the orifice plate is disposed between the peripheral wall and the aperture plate,
The orifice plate is formed with an insertion opening that allows the insertion member to pass therethrough,
The vaporizer according to claim 2 or 3 , wherein the insertion member supports the orifice plate by being inserted into a support hole and an insertion opening corresponding to one of the plurality of positioning holes. The vaporizer according to any one of claims 2 to 4 , further comprising a cover member attached to an outer surface of the peripheral wall so as to cover the plurality of positioning holes. An open rack type vaporizer that vaporizes the liquefied gas by exchanging heat with a heating liquid having a higher temperature than the liquefied gas,
a plurality of heat transfer panels configured to allow liquefied gas to flow therethrough;
The heating liquid has a box structure that opens upward, and is configured to cause the heating liquid that flows in through an inlet formed in the peripheral wall and overflows through the upward opening area to flow down onto the outer surface of the plurality of heat transfer panels. multiple troughs arranged,
a manifold configured to distribute the heating liquid to the plurality of troughs;
an orifice plate formed with an orifice hole through which the heating liquid flowing from the inflow port passes;
a fixing part configured to be able to change the fixing position of the orifice plate with respect to the peripheral wall so as to allow a change in the overlapping area of the inflow port and the orifice hole;
a pair of regulating members arranged on the peripheral wall so as to sandwich the inflow port on the left and right sides and extending in the vertical direction;
The orifice plate is vertically displaceable between the pair of restriction members along the pair of restriction members, and when the orifice plate is displaced in the vertical direction, the pair of restriction members A vaporizer , wherein tilting of the orifice plate in a direction away from a peripheral wall and in a direction along the peripheral wall is restricted . The vaporizer according to any one of claims 1 to 6 , wherein the fixing part is configured to press the orifice plate against the peripheral wall.

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