TW202104791A - Replacement method for vaporization device - Google Patents

Abstract

The present application discloses a method for replacing an existing vaporization device with a new vaporization device. The replacement method comprising: removing a heat exchanger of an existing vaporization device from a base structure; installing a first heat exchanger including an open rack-type vaporizer on the base structure from which the heat exchanger has been removed; installing, on a place other than the base structure, a second heat exchanger for heating the vaporized gas obtained by vaporizing a liquefied gas; connecting the first heat exchanger to the second heat exchanger so that the vaporized gas flows from the first heat exchanger into the second heat exchanger; and increasing the supply amount of the liquefied gas to be supplied to the first heat exchanger to be greater than the supply amount of the liquefied gas having been supplied to the heat exchanger of the existing vaporization device.

Description

Replacement method of gasification device

The present invention relates to a method of replacing an existing gasification device with a new gasification device.

There is known an open-frame vaporization device (refer to Japanese Patent Laid-Open No. 10-196894 and Japanese Patent Laid-Open No. 2017-40296), which has a heating liquid supplied to the outer surface of a heat transfer tube in which liquid gas flows, and A heat exchanger constructed to vaporize liquid gas.

When an existing gasification device is exchanged for a new gasification device, it is required to suppress the increase in costs associated with the exchange and to increase the ability to vaporize liquid gas. In order to suppress the increase in the exchange cost, it is preferable to use the heat exchanger of the existing gasification device in the fixed basic structure and also use it in the new gasification device. However, when the basic structure is reused, it is difficult to increase the capacity of the new gasification device. For example, when the basic structure is reused, the size of the new gasification device cannot be greatly increased from the size of the existing gasification device. If the size of the new gasification device cannot be increased, for example, measures such as increasing the number of heat pipes, lengthening the heat pipes, and increasing the number of heat conducting panels cannot be adopted, which limits the gasification capacity.

The object of the present invention is to provide a technique which can use the basic structure of the heat exchanger of the existing gasification device to fix and install a new gasification device having a gasification ability superior to that of the existing gasification device.

The replacement method of a gasification device of one type of the present invention can be used to replace an existing gasification device with a new gasification device. The gasification device has: A heat exchanger that supplies a heating liquid to vaporize the liquid gas to generate a gaseous gas and raise the temperature of the gaseous gas. The replacement method includes the following operations: removing the heat exchanger of the existing vaporization device from the basic structure; fixing the first heat exchanger with one or more open-frame vaporizers The open-frame vaporizer is installed on the basic structure from which the heat exchanger is removed, and the open-frame vaporizer is configured to supply a heating liquid to the outer peripheral surface of the heat transfer tube in which the liquid gas flows, thereby vaporizing the liquid gas; Where the aforementioned basic structure is different, a second heat exchanger that raises the temperature of the gaseous gas obtained as a result of the vaporization of the aforementioned liquid gas is installed; the aforementioned gaseous gas flows from the aforementioned first heat exchanger to the aforementioned second heat exchanger The method is to connect the first heat exchanger to the second heat exchanger; perform any of the following: make the supply amount of the liquid gas supplied to the first heat exchanger more vaporized than the existing one. The supply of the liquid gas supplied to the heat exchanger by the device is larger, and the temperature of the gaseous gas obtained as a result of the gasification of the liquid gas is higher than that of the gasification result of the aforementioned existing gasification device. The temperature of the obtained gaseous gas is higher.

The above-mentioned replacement method can use the basic structure of the heat exchanger of the existing gasification device to fix and install a new gasification device with better gasification ability than the existing gasification device.

The purpose, features, and advantages of the present invention will be more apparent from the following detailed description and additional drawings.

Fig. 1 is a schematic layout diagram of a conventional gasification device 100. Referring to FIG. 1, a conventional gasification device 100 will be described.

The gasification device 100 includes three heat exchangers 111, 112, and 113 arranged at intervals on the basic structure 200, and three multi-manifolds 114 connected to the heat exchangers 111, 112, and 113. 115, 116. Each of the heat exchangers 111, 112, and 113 is arranged to vaporize the liquid gas through heat exchange between seawater and the liquid gas to generate gaseous gas. The manifolds 114, 115, and 116 are used to supply seawater and liquid gas to the heat exchangers 111, 112, and 113, and to recover gaseous gas from the heat exchangers 111, 112, and 113.

The manifolds 114, 115, and 116 extend in the alignment direction of the heat exchangers 111, 112, and 113 outside the basic structure 200. Each of the multi-manifolds 114, 115, and 116 is connected to the heat exchangers 111, 112, and 113. The multi-manifold 114 is connected to a sea water pump 212, and the sea water pump 212 discharges the sea water obtained by the water intake device 211. The supply path of seawater is depicted by a broken line in FIG. 1. The multi-manifold 115 is connected to a supply device 220 for supplying liquid gas. The supply amount of liquid gas from the supply device 220 is set at a predetermined value based on the amount of gaseous gas required by the demand side. The supply path of the liquid gas is depicted by chain lines in FIG. 1. In the multi-manifold 116, gaseous gas generated in the heat exchangers 111, 112, and 113 flows in. The multi-manifold 116 is connected to a pipe member extending from the demand side that needs gaseous gas. The flow path of the gaseous gas is depicted by a solid line in FIG. 1.

The basic structure 200 is used to fix the heat exchangers 111, 112, and 113. The base structure 200 includes a base 230 formed on the ground, and a base frame 231 erected from the base 230. The base frame 231 includes, in a plan view, a substantially C-shaped outer frame 232 and two partition frames 233 that partition the area surrounded by the outer frame 232 into three fixed areas 234, 235, and 236.

The heat exchangers 111, 112, and 113 have an open-frame structure, and are common in structure. The structure of the heat exchangers 111, 112, and 113 will be described with reference to FIGS. 1 and 2. Fig. 2 is a schematic perspective view of an open-frame vaporizer 300 included in each of the heat exchangers 111, 112, and 113. The heat exchangers 111, 112, and 113 may each have only one open-frame vaporizer 300, or may have two or more open-frame vaporizers 300.

The open-frame vaporizer 300 is configured to generate a gaseous gas having a higher temperature than the demand side requires when a liquid gas of a predetermined flow rate is supplied from the supply device 220. The open-frame vaporizer 300 includes three heat-conducting panels 310, four supply pipes 321 extending directly or indirectly from the multi-manifold 114, and four trays 322 respectively connected to the supply pipes 321. In addition, the open-frame vaporizer 300 has a pair of multi-manifolds 315 and 316. The multi-manifold 315 is connected to the multi-manifold 115 described with reference to FIG. 1 (refer to FIG. 1 ). The multi-manifold 316 is connected to the multi-manifold 116 described with reference to FIG. 1. The four troughs 322 are spaced apart, and are aligned in the width direction of the opening of the base frame 231. The heat conducting panel 310 is erected between the trough plates 322. Therefore, the three heat-conducting panels 310 are also spaced apart and aligned in the width direction of the opening of the base frame 231.

Each of the three heat conducting panels 310 includes: a lower header 311, an upper header 312 arranged at a position separated above the lower header 311, and a plurality of pieces extending substantially vertically between the lower header 311 and the upper header 312 Heat pipe 313. The lower header 311 extends from the multi-manifold 315 for liquid gas into the fixed areas 234, 235, and 236. The upper header 312 extends from the multi-manifold 316 for gaseous gas into the fixed areas 234, 235, and 236. The plurality of heat conducting tubes 313 are aligned in the extending direction of the lower header 311 and the upper header 312.

Each of the four trough plates 322 is used to supply seawater to the corresponding heat conducting panel 310. The trough plate 322 and the corresponding heat conducting panel 310 form an open-frame vaporizer. The trough plate 322 has a box-like structure that is long in the alignment direction of the heat pipe 313, and is open at the upper side. The trough plate 322 is arranged at a position lower than the upper header 312 and higher than the middle position of the heat conduction panel 310 in the vertical direction, and is adjacent to the upper part of the plurality of heat conduction tubes 313.

The four supply pipes 321 are connected to the four trays 322 and the multi-manifold 114 for seawater to form a seawater supply path.

After the seawater is obtained by the water intake device 211, it is sent to the multi-manifold 114 by the seawater pump 212. For seawater, four supply pipes 321 of each of the heat exchangers 111, 112, and 113 are allocated by the multi-manifold 114. The seawater is supplied to the four tank plates 322 of the heat exchangers 111, 112, and 113 through the supply pipes 321. The seawater overflows from the pan 322 and is supplied to the upper part of the outer peripheral surface of the plurality of heat transfer pipes 313. The sea water flows down along the outer peripheral surface of the heat pipes 313. The supply of seawater is set to obtain a gaseous gas at a higher temperature than the demand side needs.

The liquid gas is supplied from the supply device 220 to the multi-manifolds 115 and 315, and is distributed to the lower headers 311 of the heat exchangers 111, 112, and 113 through the multi-manifold 315. The liquid gas flows from the lower header 311 to the plurality of heat conducting tubes 313 and faces the upper header 312. During this period, the liquid gas exchanges heat with the seawater flowing down the outer peripheral surface of the plurality of heat transfer pipes 313, and becomes a gaseous gas. The gaseous gas passes through the upper header 312 and the multi-manifolds 316 and 116 in sequence to be supplied to the demand side. The heat exchangers 111, 112, and 113 not only have the function of generating a phase change from liquid gas to gaseous gas, but also have the function of raising the temperature of the gaseous gas to a certain extent. Therefore, the temperature of the gaseous gas discharged from the heat exchangers 111, 112, and 113 exceeds the predetermined temperature required by the demand side.

The replacement method for replacing the gasification device 100 with a new gasification device 400 will be described with reference to FIGS. 1 and 3 to 5. The replacement method is roughly divided into: a removal process of the removal gasification device 100, a fixing process of fixing the main parts of the new gasification device 400, and a connection process of pipe connections between the main parts. Fig. 3 is a layout diagram schematically showing the removal process. Fig. 4 is a layout diagram schematically showing the fixing work. Fig. 5 is a layout diagram schematically showing the connection process.

In the removal process (refer to FIG. 3), the connection between the manifolds 114, 115, and 116 and the heat exchangers 111, 112, and 113 is released. After that, the heat exchangers 111, 112, and 113 are removed from the basic structure 200.

In the fixing process (refer to FIG. 4), three first heat exchangers 431, 432, and 433 and one second heat exchanger 434 are installed. The first heat exchangers 431, 432, and 433 are fixedly installed in the foundation structure 200 so as to be arranged in the fixed areas 234, 235, and 236, respectively. That is, the first heat exchangers 431, 432, and 433 are respectively fixedly installed at positions where the existing heat exchangers 111, 112, and 113 were fixedly installed. The second heat exchanger 434 is fixedly installed at a position separated from the basic structure 200.

In the connection process (refer to FIG. 5), the first heat exchangers 431, 432, and 433 are connected to each of the three manifolds 114, 115, and 116. The multi-manifold 116 is also connected to the second heat exchanger 434. In the connection process, the second heat exchanger 434 is connected to the demand side, and the new gasification device 400 is completed.

Regarding the structure of the first heat exchangers 431, 432, and 433, the description of the open-frame vaporizer 300 in FIG. 2 is applied to each of the first heat exchangers 431, 432, and 433.

As the second heat exchanger 434, a heat exchanger 440 having a shell and tube structure can be used. The heat exchanger 440 will be described with reference to FIGS. 4 to 6. FIG. 6 is a schematic cross-sectional view of the heat exchanger 440. As shown in FIG.

The heat exchanger 440 has a hollow shell 441 through which the heating medium flows in and out, a plurality of heat pipes 442 through which gaseous gas flows, and a pair of tube chambers 443 and 444 connected to the respective ends of the heat pipes 442. In addition, the heat exchanger 440 has a supply pipe 471 and a discharge pipe 472, which form an inlet and an outlet of the heating medium to the housing 441, respectively. The heat pipe 442 is arranged in the shell 441 and extends along the extending direction of the shell 441. The pipe chamber 443 is connected to the multi-manifold 116 or a pipe member connected to the multi-manifold 116 in the connection process (refer to FIG. 5). The tube chamber 444 is connected to a tube member connected to the demand side. In addition, a gaseous gas may be circulated through the shell 441, and a heating medium may be circulated through the heat pipe 442.

The heating medium is passed through the supply pipe after the heat exchanger 440 is fixedly installed as the second heat exchanger 434 in the fixing process (refer to FIG. 4) and the connection process (refer to FIG. 5) or after the connection process is completed. 471, come and supply it into the shell 441. The heating medium applies heat to the gaseous gas flowing through the plurality of heat transfer tubes 442 in the case 441. After that, the heating medium is discharged out of the casing 441 through the discharge pipe 472. The heating medium supplied into the shell 441 may be seawater, or other media having a higher temperature than gaseous gas. When seawater is used as a heating medium, it may be supplied from the water intake device 211 to the supply pipe 471.

After the new vaporization device 400 is completed, the liquid gas is supplied from the supply device 220 to the first heat exchangers 431, 432, and 433. The gaseous gas obtained as a result of the heat exchange in the first heat exchangers 431, 432, and 433 passes through the manifold 116 and the tube chamber 443, and flows into the heat transfer tube 442. The gaseous gas flowing in the heat pipe 442 exchanges heat with the heating medium in the shell 441, and the temperature becomes higher than the temperature required by the demand side. The gaseous gas heated by the heating medium is discharged through the tube chamber 444 and supplied to the demand side.

The advantages of replacing the existing gasification device 100 with a new gasification device 400 are described below.

1 and 5, it can be seen that the basic structure 200, the multi-manifold 114, 115, 116, the supply equipment 220, the sea water pump 212, and the water intake equipment 211 and other auxiliary equipment are used in both the gasification devices 100 and 400. These ancillary equipment can be directly used in the new gasification device 400, so the increase in costs associated with replacing the existing gasification device 100 with the new gasification device 400 is suppressed. However, part or all of these auxiliary equipment may be exchanged to match the performance required by the new gasification device 400.

The new vaporization device 400 has a second heat exchanger 434 in addition to the first heat exchangers 431, 432, and 433 corresponding to the existing heat exchangers 111, 112, and 113. The second heat exchanger 434 has the function of raising the temperature of the gaseous gas generated by the first heat exchangers 431, 432, and 433. Therefore, the first heat exchangers 431, 432, and 433 are the same as the existing heat exchangers 111, 112. , 113 is different, it does not have to serve as the function of heating up the gaseous gas. When the new gasification device 400 requires more gaseous gas supply than the existing gasification device 100, the supply device 220 is to compare the supply of liquid gas to the existing heat exchangers 111, 112, and 113. A larger supply amount is used to supply the liquid gas to the first heat exchangers 431, 432, and 433. In this case, the temperature of the gaseous gas from the first heat exchangers 431, 432, 433 to the second heat exchanger 434 may be lower than the temperature required by the demand side. However, since the second heat exchanger 434 raises the temperature of the gaseous gas, the temperature of the gaseous gas from the second heat exchanger 434 to the demand side can satisfy the demanded temperature condition of the demand side. Therefore, the new gasification device 400 has a higher gasification capacity and can supply gaseous gas that meets the requirements of the demand side.

In addition, when the new gasification device 400 requires the supply of gaseous gas at a higher temperature than the gaseous gas obtained from the existing gasification device 100, the second heat exchanger 434 is mainly controlled, thereby enabling Raise the temperature of the gaseous gas to the required temperature condition of the demand side. In this case too, the new gasification device 400 has a higher gasification capacity and can supply gaseous gas that meets the requirements of the demand side.

As described above, the new gasification device 400 has the following advantages. The gasification device 400 can be operated according to the requirements of the demand side, and any one of the following advantages can be obtained.

(1) The new gasification device 400 can increase the processing capacity of liquid gas to a higher level than the existing gasification device 100. (2) The new gasification device 400 can make the temperature of the obtained gaseous gas higher than that of the gasification device 100. (3) The new gasification device 400 can increase the processing capacity of liquid gas to be higher than that of the gasification device 100, and make the temperature of the obtained gaseous gas higher than that of the gasification device 100.

The gaseous gas obtained in the three first heat exchangers 431, 432, and 433 is allowed to flow into the second heat exchanger 434. That is, the temperature raising process of the gaseous gas obtained in the three first heat exchangers 431, 432, and 433 is performed by one second heat exchanger 434. Therefore, compared with the structure provided with the temperature raising equipment corresponding to each of the first heat exchangers 431, 432, and 433, the new vaporization device 400 does not require a wide area. Compared with the installation area of the existing gasification device 100, the new gasification device 400 only needs to increase the area of the installation area component of the second heat exchanger 434.

The heating medium flowing into and out of the casing 441 can be selected from various types on the condition that the heating medium has a higher temperature than the gaseous gas flowing into the casing 441. For example, the heating medium may be any of warm water, engineering water, sea water, steam, and warm air.

FIG. 7 is a schematic cross-sectional view of another heat exchanger 450 that can be used as the second heat exchanger 434. The heat exchanger 450 will be described with reference to FIG. 1, FIG. 6, and FIG.

The heat exchanger 450 includes a heat transfer tube 453 having a plurality of fins 451. These fins 451 are provided to increase the heat transfer area from the air to the gaseous gas. While the gaseous gas is flowing in the heat pipe 453, the heat of the air will be transferred to the gaseous gas through the heat pipe 453 and the fins 451. Since air is used to raise the temperature of the gaseous gas, the operating cost of the heat exchanger 450 is relatively inexpensive.

The second heat exchanger 434 may be a plate heat exchanger. FIG. 8 is a schematic perspective view of a plate heat exchanger 460 that can be used as the second heat exchanger 434. As shown in FIG.

The heat exchanger 460 has a plurality of heat conducting plates 461 with high thermal conductivity. The heat conducting plates 461 are formed with concavities and convexities on the surface and overlap in a predetermined direction. As a result, between the adjacent heat transfer plates 461, a flow path through which the gaseous gas or the heating medium flows is formed at the boundary. The junction of one pair of adjacent heat transfer plates 461 forming the flow path for the gaseous gas is referred to as the "first junction 462" in the following description. In the following description, the junction between one pair of adjacent heat transfer plates 461 forming the flow path for the heating medium is referred to as the "second junction 463". The first joining portion 462 and the second joining portion 463 are arranged alternately in the alignment direction of the heat transfer plate 461.

The heat exchanger 460 is formed with a supply flow path 464 and an exhaust flow path 465 for gaseous gas, and a supply flow path 466 and a discharge flow path 467 for the heating medium. These flow paths 464 to 467 are formed so as to penetrate through the heat conducting plate 461, respectively. The supply flow path 464 and the exhaust flow path 465 for the gaseous gas communicate with the flow path formed in the first junction 462. Then, this flow path becomes a gas flow path through which gaseous gas flows. The supply flow path 466 and the discharge flow path 467 for the heating medium communicate with the flow path formed in the second junction 463. Then, this flow path becomes a media flow path through which the heating medium flows.

In the connection process (refer to FIG. 5), the multi-manifold 116 or a pipe member extending from the multi-manifold 116 communicates with the supply flow path 464 for gaseous gas. The pipe member connected to the demand side is connected to the exhaust flow path 465 for gaseous gas. The supply flow path 466 for the heating medium is connected with a pipe member which guides the heating medium discharged from a supply source (not shown) of the heating medium. The discharge flow path 467 for the heating medium communicates with a pipe member that returns the heating medium to the supply source.

After the connection process, the liquid gas is supplied from the supply device 220 to the first heat exchangers 431, 432, and 433. The gaseous gas obtained in the first heat exchangers 431, 432, and 433 passes through the supply flow path 464 for gaseous gas and flows into the gas flow path of the first junction 462. At this time, the heating medium passes through the supply flow path 466 and is supplied from the supply source to the media flow path of the second junction 463. The gaseous gas flowing in the gas flow path of the first joining portion 462 passes through the heat transfer plate 461 and exchanges heat with the heating medium flowing in the medium flow path of the second joining portion 463 to increase the temperature. The heated gaseous gas passes through the exhaust flow path 465 and is supplied to the demand side. The heating medium after the heat exchange passes through the discharge flow path 467 and returns to the supply source.

The heat exchange between the gaseous gas and the heating medium is performed through a plurality of heat conducting plates 461 having high thermal conductivity. Therefore, the heat of the heating medium is efficiently transferred to the gaseous gas.

Regarding the above-mentioned embodiment, the existing gasification device 100 having a plurality of heat exchangers 111, 112, and 113 is replaced with a new gasification device 400. However, the above-mentioned replacement method can also be applied to replace the existing gasification device 101 with one heat exchanger with a new gasification device 401. Fig. 9 is a schematic layout diagram of a conventional gasification device 101. Fig. 10 is a layout diagram showing the outline of the removal process. Fig. 11 is a layout diagram showing the outline of the fixing work. Fig. 12 is a layout diagram showing the outline of the connection process. 1, 3, 9 to 12, the replacement method from the existing gasification device 101 to the new gasification device 401 will be described.

The existing gasification device 101 (refer to FIG. 9) has a heat exchanger 111. The heat exchanger 111 is fixedly installed in the base structure 201. The base structure 201 has a base 230 and a base frame 237. The base frame 237 has a substantially C-shaped shape in a plan view to form the fixed area 234. In the removal process (refer to FIG. 10), the connection between the heat exchanger 111, the sea water pump 212, the supply device 220, and the consumer is released. After that, the heat exchanger 111 is removed from the basic structure 201. In the fixing process (refer to FIG. 11 ), the first heat exchanger 431 is fixedly installed on the foundation structure 201. The second heat exchanger 434 is fixedly installed outside the base structure 201. In the connection process (see FIG. 12), the first heat exchanger 431 is connected to the sea water pump 212, the supply device 220, and the second heat exchanger 434. The second heat exchanger 434 is connected to the demand side in addition to the first heat exchanger 431. After that, the supply amount of the liquid gas from the supply device 220 is increased.

Regarding the above embodiment, the new first heat exchangers 431, 432, and 433 may have the same structure as the existing heat exchangers 111, 112, and 113, and may have the existing heat exchangers 111, 112, and 113. An improved structure is also possible. For example, if the new first heat exchangers 431, 432, and 433 can be arranged in the fixed areas 234, 235, and 236, the first heat exchangers 431, 432, and 433 will be better than the existing heat exchanger 111. , 112, 113 more heat pipes 313 can also be used.

Regarding the above-mentioned embodiment, the base frame 231 opens toward the manifolds 114, 115, and 116. However, the base frame 231 may open in a direction opposite to the multi-manifold 114, 115, and 116.

In the case where at least any one of the existing heat exchangers 111, 112, 113 shown in FIG. 1 has two or more open-frame vaporizers 300 shown in FIG. 2, the basic structure 200 may also include: A partition member (not shown) that separates open-frame vaporizers that belong to the same heat exchanger and are adjacent to each other.

The type of liquid gas supplied to the gasification devices 100 and 400 includes liquid natural gas.

Regarding the above-mentioned embodiment, seawater is used for the vaporization of liquid gas. However, other heating liquids having a higher temperature than liquid gas can also be used for vaporization of liquid gas.

The replacement method of the gasification device explained in the above various embodiments mainly has the following characteristics.

The replacement method of a gasification device of one type of the present invention can be used to replace an existing gasification device with a new gasification device. The gasification device has: A heat exchanger that supplies a heating liquid to vaporize the liquid gas to generate a gaseous gas and raise the temperature of the gaseous gas. The replacement method includes the following operations: removing the heat exchanger of the existing vaporization device from the basic structure; fixing the first heat exchanger with one or more open-frame vaporizers The open-frame vaporizer is installed on the basic structure from which the heat exchanger is removed, and the open-frame vaporizer is configured to supply a heating liquid to the outer peripheral surface of the heat transfer tube in which the liquid gas flows, thereby vaporizing the liquid gas; Where the aforementioned basic structure is different, a second heat exchanger that raises the temperature of the gaseous gas obtained as a result of the vaporization of the aforementioned liquid gas is installed; the aforementioned gaseous gas flows from the aforementioned first heat exchanger to the aforementioned second heat exchanger The method is to connect the first heat exchanger to the second heat exchanger; perform any of the following: make the supply amount of the liquid gas supplied to the first heat exchanger more vaporized than the existing one. The supply of the liquid gas supplied to the heat exchanger by the device is larger, and the temperature of the gaseous gas obtained as a result of the gasification of the liquid gas is higher than that of the gasification result of the aforementioned existing gasification device. The temperature of the obtained gaseous gas is higher.

According to the above structure, the new gasification device, as described below, can have a gasification capacity that exceeds that of the existing gasification device, and the basic structure used for the fixed installation of the existing gasification device can also be used in the new gasification device. The gasification unit. The basic structure of the existing gasification device is used in the fixed installation of the first heat exchanger of the new gasification device. The gaseous gas vaporized in the first heat exchanger flows into the second heat exchanger and is heated by the second heat exchanger. That is, the second heat exchanger has a function of raising the temperature of the gaseous gas obtained by the first heat exchanger. The first heat exchanger, unlike the heat exchanger of the existing gasification device, does not have the function of raising the temperature of the gaseous gas, as long as it can produce a phase change from a liquid gas to a gaseous gas. The temperature of the liquid gas from the first heat exchanger to the second heat exchanger may be lower than the necessary temperature. Therefore, the supply of the liquid gas to the first heat exchanger can be set to be higher than that of the existing gasification device The supply of liquid gas to the heat exchanger has a larger value. If the demand side requires a gaseous gas with a higher temperature than the gaseous gas produced by the existing gasification device, a second heat exchanger can be used to generate a gaseous gas that meets the demand side's temperature requirements. Therefore, the new gasification device has a gasification capacity that exceeds the existing gasification device.

Regarding the above-mentioned structure, the above-mentioned basic structure may include a basic frame, and the basic frame is erected so as to define a fixed area of the existing gasification device where the heat exchanger is fixedly installed. The first heat exchanger may be fixedly installed in the fixed area.

According to the above structure, the first heat exchanger is fixedly installed in the fixed area defined by the base frame, so the base frame used in the existing gasification device can also be used in the new gasification device. Since there is no need to install a new basic frame, the cost of replacement of the gasification device can be suppressed.

Regarding the above structure, the aforementioned existing gasification device may have a plurality of the aforementioned heat exchangers. In the process of removing the heat exchanger of the existing gasification device from the basic structure, the plurality of heat exchangers may be removed from the basic structure. In the process of fixing the first heat exchanger to the basic structure, the first heat exchanger may be fixedly installed in each of the plurality of fixed positions where the plurality of heat exchangers have been fixedly installed. In the process of connecting the first heat exchanger to the second heat exchanger, (i) the multi-manifold is connected to the foregoing so that the gaseous gas obtained in the plurality of first heat exchangers flows in. A plurality of first heat exchangers, (ii) connecting the multi-manifold or a pipe member extending from the multi-manifold so that the gaseous gas that has flowed into the multi-manifold flows into the second heat exchanger The aforementioned second heat exchanger may also be used.

According to the above structure, the existing gasification device and the replaced gasification device can be constructed without an excessively wide installation space as described below. When the existing gasification device has a plurality of heat exchangers, the new gasification device may have a plurality of first heat exchangers instead of these heat exchangers. These first heat exchangers are arranged at the fixed positions of the heat exchangers of the existing gasification equipment, so the space used for the installation of the plural heat exchangers of the existing gasification equipment can be used in plural The installation of the first heat exchanger. The first heat exchangers are connected by a multi-manifold, so the gaseous gas obtained by the first heat exchangers flows into the multi-manifold. The second heat exchanger receives gaseous gas obtained by a plurality of first heat exchangers through a multi-manifold or a pipe member extending from the multi-manifold, and can raise the temperature of the received gaseous gas. That is, it is not necessary to provide a plurality of second heat exchangers corresponding to each of the plurality of first heat exchangers, and the function of raising the temperature of the gaseous gas can be obtained. Since it is not necessary to install a plurality of second heat exchangers corresponding to each of the plurality of first heat exchangers, the gasification device after exchange with the existing gasification device does not require an excessively wide installation space.

Regarding the above structure, the second heat exchanger may be a structure that uses a different type of heating medium from the heating liquid to raise the temperature of the gaseous gas.

According to the above-mentioned structure, the heat exchanger of the existing gasification device uses the heating liquid used for the gasification of the liquid gas, and is also used for the temperature rise of the gaseous gas. In this case, the heating medium cannot be selected due to the vaporization of the liquid gas and the temperature rise of the gaseous gas. On the other hand, the second heat exchanger, unlike the heat exchanger of the existing gasification device, uses a different type of heating medium from the heating liquid used for the phase change from liquid gas to gaseous gas, so that The gaseous gas heats up. Therefore, a heating medium suitable for the temperature increase of the gaseous gas can be selected.

Regarding the above-mentioned structure, the second heat exchanger may also have a hollow shell, a heat transfer pipe extending from the shell, and a connection such that a heating medium having a higher temperature than the gaseous gas flows in and out of the shell. The supply pipe and the discharge pipe of the aforementioned shell. In the process of connecting the first heat exchanger to the second heat exchanger, the gaseous gas flows from the first heat exchanger to the heat transfer tube of the second heat exchanger, and the second heat exchanger 1 The pipe member extending from the heat exchanger may be connected to the aforementioned second heat exchanger.

According to the above structure, the heating medium can be selected from various types of medium under the condition of a higher temperature than the gaseous gas. When the gaseous gas flows from the first heat exchanger to the heat transfer pipe extending from the shell of the second heat exchanger, the temperature of the gaseous gas is raised by the heating medium flowing into the shell.

Regarding the above structure, the second heat exchanger may be a plate-type heat exchanger in which a flow path for a heating medium having a higher temperature than the gaseous gas and a flow path for the gaseous gas are formed. In the process of connecting the first heat exchanger to the second heat exchanger, the gaseous gas flows from the first heat exchanger into the flow path for the gaseous gas, and the first heat is removed from the gaseous gas flow path. The pipe member extending from the exchanger may be connected to the aforementioned plate-type heat exchanger.

According to the above structure, the heat of the heating medium flowing in the medium flow path is transferred to the gaseous gas in the gas flow path through the heat conducting plate, and is used to raise the temperature of the gaseous gas.

Regarding the above structure, the second heat exchanger may have a heat transfer tube and fins protruding from the heat transfer tube. In the process of connecting the first heat exchanger to the second heat exchanger, the gaseous gas flows from the first heat exchanger to the heat transfer tube of the second heat exchanger, and the second heat exchanger 1 The pipe member extending from the heat exchanger may be connected to the aforementioned second heat exchanger.

According to the above structure, the gaseous gas flows into the heat transfer tube of the second heat exchanger from the first heat exchanger, and exchanges heat with the air through the heat transfer tube and the fins. Therefore, air can be used to increase the temperature of the gaseous gas. Therefore, the cost necessary for the temperature rise of the gaseous gas can be suppressed. [Industrial availability]

The technology described in the above-mentioned embodiment can be suitably used in various technical fields using gaseous gas.

100: Existing gasification device 212: Sea water pump 111: Heat Exchanger 220: supply equipment 112: Heat Exchanger 230: Base 113: Heat Exchanger 231: basic frame 114: Multi-Manifold 232: Outer Frame 115: Multi-Manifold 233: divider box 116: Multi-Manifold 234: fixed area 200: basic structure 235: fixed area 211: water fetching equipment 236: fixed area

[Figure 1] The schematic layout of the existing gasification plant. [Figure 2] A schematic perspective view of the vaporizer of the existing vaporization device. [Figure 3] A layout diagram schematically showing the removal process. [Figure 4] A layout diagram that outlines the fixed installation project. [Figure 5] A layout diagram schematically showing the connection works. [Fig. 6] A schematic cross-sectional view of a heat exchanger that can be used as a second heat exchanger of a new gasification device. [Fig. 7] A schematic cross-sectional view of another heat exchanger that can be used as the second heat exchanger of the new gasification device. [Fig. 8] A schematic perspective view of another heat exchanger that can be used as the second heat exchanger of the new gasification device. [Figure 9] The schematic layout of the existing gasification plant. [Figure 10] A layout diagram showing the outline of the removal process. [Figure 11] A layout diagram showing the outline of the fixed installation project. [Figure 12] A layout diagram showing the outline of the connection project.

100: Existing gasification device

111: Heat Exchanger

112: Heat Exchanger

113: Heat Exchanger

114: Multi-Manifold

115: Multi-Manifold

116: Multi-Manifold

200: basic structure

211: water fetching equipment

212: Sea water pump

220: supply equipment

230: Base

231: basic frame

232: Outer Frame

233: divider box

234: fixed area

235: fixed area

236: fixed area

Claims (7)

A method for replacing a gasification device. The existing gasification device is replaced with a new gasification device. The gasification device has: A heat exchanger that vaporizes liquid gas to generate gaseous gas and heat the aforementioned gaseous gas. This method has the following operations: Remove the aforementioned heat exchanger of the aforementioned existing gasification device from the basic structure; The first heat exchanger equipped with one or more open-frame vaporizers is fixedly installed on the aforementioned basic structure from which the heat exchanger is removed. The open-frame vaporizer is configured to flow liquid gas The outer peripheral surface of the heat conducting tube is supplied with heating liquid, thereby vaporizing the aforementioned liquid gas; Install a second heat exchanger that raises the temperature of the gaseous gas obtained as a result of the vaporization of the liquid gas in a place different from the aforementioned basic structure; Connecting the first heat exchanger to the second heat exchanger in such a manner that the gaseous gas flows from the first heat exchanger to the second heat exchanger; Perform at least one of the following: make the supply amount of the liquid gas supplied to the first heat exchanger larger than the supply amount of the liquid gas supplied to the heat exchanger in the existing gasification device , And the temperature of the gaseous gas obtained as a result of the vaporization of the aforementioned liquid gas is higher than the temperature of the gaseous gas obtained as a result of the vaporization by the aforementioned existing gasification device. The replacement method of a gasification device according to claim 1, wherein: The aforementioned basic structure includes a foundation frame, which is erected to define a fixed area of the aforementioned existing gasification device where the aforementioned heat exchanger is fixedly arranged, The first heat exchanger is fixedly installed in the fixing area. The replacement method of a gasification device according to claim 1 or 2, wherein: The aforementioned existing gasification device has a plurality of aforementioned heat exchangers, In the process of removing the heat exchanger of the existing gasification plant from the basic structure, the plural heat exchangers are removed from the basic structure, In the process of fixing the first heat exchanger to the foundation structure, the first heat exchanger is fixedly installed in each of the plurality of fixed positions where the plurality of heat exchangers were fixedly installed, and In the process of connecting the first heat exchanger to the second heat exchanger, (i) Connecting a multi-manifold to the plurality of first heat exchangers so that the gaseous gas obtained in the plurality of first heat exchangers flows in, (ii) The multi-manifold or a pipe member extending from the multi-manifold is connected to the second heat exchanger so that the gaseous gas that has flowed into the multi-manifold flows into the second heat exchanger. The replacement method of a gasification device according to claim 1 or 2, wherein: The second heat exchanger is configured to use a different type of heating medium from the heating liquid to raise the temperature of the gaseous gas. The replacement method of a gasification device according to claim 1 or 2, wherein: The second heat exchanger includes a hollow shell, a heat pipe extending in the shell, and a supply pipe connected to the shell so that a heating medium having a higher temperature than the gaseous gas flows in and out of the shell And discharge pipe, In the process of connecting the first heat exchanger to the second heat exchanger, the gaseous gas flows from the first heat exchanger to the heat transfer pipe of the second heat exchanger, and the second heat exchanger 1 The pipe member extending from the heat exchanger is connected to the aforementioned second heat exchanger. The replacement method of a gasification device according to claim 1 or 2, wherein: The second heat exchanger is a plate-type heat exchanger in which a flow path for a heating medium having a higher temperature than the gaseous gas and a flow path for the gaseous gas are formed. In the process of connecting the first heat exchanger to the second heat exchanger, the gaseous gas flows from the first heat exchanger to the flow path for the gaseous gas, and the first heat is removed from the The pipe member extending from the exchanger is connected to the aforementioned plate-type heat exchanger. The replacement method of a gasification device according to claim 1 or 2, wherein: The second heat exchanger has a heat pipe and fins protruding from the heat pipe, In the process of connecting the first heat exchanger to the second heat exchanger, the gaseous gas flows from the first heat exchanger to the heat transfer pipe of the second heat exchanger, and the second heat exchanger 1 The pipe member extending from the heat exchanger is connected to the aforementioned second heat exchanger.

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