JP2018031565A - Heat exchanger and heat exchange system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat exchanger and a heat exchange system capable of suitably exchanging heat between a fluid to be heated and a heat source regardless of the circulation of an intermediate medium. SOLUTION: A heat radiating side shell 4 is installed in the middle of an exhaust heat line through which a heating fluid (exhaust gas) G containing exhaust heat flows, and the heating fluid (exhaust gas) G is passed through the inside, and the heat radiating side shell 4. A heat sink unit 2 provided with a heat sink 5 arranged inside the heat sink 5 for recovering heat from the heating fluid (exhaust gas) G, a heat receiving side shell 6 arranged adjacent to the heat radiating side shell 4, and the heat receiving side shell 6. A heat receiving side unit including a heating line 8 for circulating a fluid to be heated (LNG) L inside a heat receiving side shell 6 and a heat receiving fin 7 connected to the heating line 8 and arranged adjacent to a heat sink 5. 3 and a heat transfer plate 9 sandwiched between the heat sink 5 and the heat receiving fins 7 are provided. [Selection diagram] Fig. 1

Description

  The present invention relates to a heat exchanger for heating a fluid such as liquefied natural gas, and a heat exchange system using the heat exchanger.

  Generally, when liquefied natural gas (LNG) is used as a fuel, it is necessary to heat and vaporize LNG stored at a low temperature. At this time, for heating LNG, a fluid such as air or water is used as a heat source. An open rack type heat exchanger to be used and an intermediate medium type heat exchanger that transfers heat from another heat source to the LNG by circulating an intermediate medium such as water are used.

  As a document showing a general technical level related to such a heat exchanger, for example, there is Patent Document 1 below.

JP-A-8-209158

  However, when an open rack type heat exchanger is used, air and water in the surrounding environment are used as a direct heat source for vaporizing LNG, so that the efficiency of heating depends on the temperature of air and water. Therefore, the vaporization amount of LNG varies depending on conditions such as the weather, and there is a problem that the vaporization amount decreases in the season when the outside air temperature and the seawater temperature are low.

  On the other hand, the intermediate medium type heat exchanger requires a separate heat source for reheating the intermediate medium after heat exchange with LNG, and a running cost for the heat source is generated. In addition, it is necessary to install a pump for circulating the intermediate medium, and this pump also generates initial costs, costs for power and maintenance. In the case of an LNG heat exchanger, the intermediate medium usually requires not only one type but also a plurality of types such as an antifreeze liquid as a primary medium and water as a secondary medium. In addition, the flow path configuration for efficiently transferring heat from the heat source to the primary medium, the secondary medium, and LNG must be very complicated, and the cost for construction and maintenance will increase. . For example, exhaust heat from a power generation facility or the like can be used as a heat source. However, even in such a case, even if the cost of the heat source can be reduced, problems related to the flow path of the pump and the intermediate medium cannot be solved.

  In addition, although the heat exchanger for vaporizing LNG was demonstrated here as an example, the same problem may exist widely about the heat exchanger for heating not only LNG but general fluid. For example, the situation is the same in a heat exchanger or the like used for vaporizing liquefied ethylene in a chemical plant or the like.

  In view of such circumstances, the present invention is intended to provide a heat exchanger and a heat exchange system that can suitably exchange heat between a fluid to be heated and a heat source regardless of the circulation of the intermediate medium.

  The present invention includes a heat dissipating side shell that is installed in the exhaust heat line through which the heating fluid containing exhaust heat circulates and allows the heating fluid to pass through the inside, and the heat dissipating side shell disposed inside the heat dissipating side shell. A heat-dissipating unit comprising a heat sink to be recovered; a heat-receiving side shell disposed adjacent to the heat-dissipating-side shell; a heating line for circulating a fluid to be heated in the heat-receiving-side shell; and the heating line A heat exchanger including a heat receiving side unit including a heat receiving fin connected and arranged adjacent to the heat sink, and a heat transfer plate sandwiched between the heat sink and the heat receiving fin. It is.

  In the heat exchanger of the present invention, the heat receiving side shell can be filled with a heat medium.

  The present invention also relates to a heat exchange system including the above-described heat exchanger.

  The heat exchange system of the present invention includes a bypass line that bypasses the heat radiation side unit in the exhaust heat line, monitors the temperature of the heat reception side unit, and opens and closes the bypass line according to the temperature of the heat reception side unit. And it can comprise so that the flow volume of the heating fluid which flows into the said thermal radiation side shell may be adjusted.

  The heat exchange system of the present invention can be configured to monitor the temperature of the heat receiving side unit and adjust the flow rate of the heated fluid flowing in the heating line according to the temperature of the heat receiving side unit.

  The heat exchange system of the present invention is provided with an extraction device via a safety valve in the heat receiving side shell, and the safety valve opens as the pressure in the heat receiving side shell increases, and the fluid in the heat receiving side shell It can be configured to discharge to an extraction device.

  In concrete implementation of the heat exchange system of the present invention, the heated fluid flowing into the heating line is liquefied natural gas, and the heated fluid flowing into the heat radiating side shell is gas vaporized in the heat receiving side unit. The exhaust gas from the heat dissipating equipment using

  According to the heat exchanger and the heat exchange system of the present invention, it is possible to achieve an excellent effect that heat exchange can be suitably performed between the heated fluid and the heat source regardless of the circulation of the intermediate medium.

It is a perspective view which shows an example of the form of the heat exchanger by implementation of this invention. It is sectional drawing which shows an example of the form of the heat exchanger by implementation of this invention, and is the II-II arrow equivalent view of FIG. It is a schematic diagram showing an example of the whole composition of the heat exchange system by the implementation of the present invention.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

  1 and 2 show an example of a heat exchanger according to an embodiment of the present invention, and FIG. 3 shows an example of a heat exchange system using the heat exchanger.

  As shown in FIG. 1, the heat exchanger 1 receives a heat from the heat radiating side unit 2 and a heat radiating side unit 2 for recovering exhaust heat from a high heat source such as a gas turbine or a gas engine (not shown). And a heat receiving side unit 3 for heating the heated fluid L such as LNG.

  The heat radiating side unit 2 is provided in the middle of a heat exhaust line (exhaust duct) 11 through which a heating fluid G as a heat source including exhaust heat flows, and exhaust gas is exhausted inside the heat radiating side shell 4 through which the exhaust gas G passes. A heat sink 5 that recovers the heat of the gas G is provided. Here, the heating fluid G is exhaust gas from a gas turbine or a gas engine (not shown).

  The heat sink 5 is provided with a plurality of metal plates 5a as heat transfer bodies along the flow of the exhaust gas G, and comes into contact with the exhaust gas G when the exhaust gas G passes between the plates 5a. It is designed to receive heat through heat exchange. Here, the case where the flow of the exhaust gas G is along the horizontal direction is illustrated, and the plate 5a constituting the heat sink 5 is laminated so as to form a surface along the horizontal direction.

  Here, although a flat plate is illustrated as the heat transfer body 5a, the configuration of the heat transfer body 5a is not limited thereto. For example, in order to increase the contact area with the exhaust gas G, it may be configured as a corrugated plate, a punching metal, a wire mesh or the like. It can also be configured as a tube. Further, for example, a metal fiber filled in the heat radiation side shell 4 may be used. In any case, as the heat transfer body 5a, a configuration that seems to be suitable is selected in consideration of various factors such as heat exchange efficiency, pressure loss of the exhaust gas G, and the size of the heat exchanger 1 as a whole. It ’s fine.

  That is, from the viewpoint of the performance of the heat exchanger 1, the heat transfer body 5a is required to recover as much heat as possible from the exhaust gas G as a heating fluid. For this purpose, the contact area with the exhaust gas G is required. It is effective to increase the size. On the other hand, it must be avoided that the flow of the exhaust gas G is greatly stagnant. In order to reduce the pressure loss, the heat transfer body 5a has a shape or size that does not obstruct the flow of the exhaust gas G more than necessary. There is a need. Further, it is desirable that the heat radiation side unit 2 or the heat exchanger 1 as a whole can be arranged as compactly as possible so as not to become too large. Furthermore, since soot accumulates on the heat transfer body 5a as the exhaust gas G flows, it is desirable that the heat transfer body 5a has a shape that simplifies maintenance such as cleaning. In carrying out the heat exchanger 1, taking into consideration these various factors, the pressure loss of the heated fluid (exhaust gas) G is as much as possible while ensuring sufficient performance to heat the heated fluid (LNG) L. What is necessary is just to design the heat-transfer body 5a so that it may suppress.

  The heat receiving side unit 3 includes heat receiving fins 7 constituted by a plurality of metal plates 7 a as heat transfer members in the heat receiving side shell 6, and the plates 7 a of the heat receiving fins 7 include the heat receiving side shell 6. Are connected integrally so as to penetrate the piping of the heating line 8 through which the fluid L to be heated flows. In the case of the present embodiment, the heating line 8 is divided into three after being introduced along the horizontal direction from the inlet 8a provided at the lower part of the heat receiving side shell 6, as shown in FIGS. It turns upward so as to form an S-shaped flow path when viewed from the side, and merges together again before the outlet 8b provided at the upper part of the heat receiving side shell 6, and then the heat receiving side from the outlet 8b. It is guided to the outside of the shell 6. The plates 7 a of the heat receiving fins 7 provided in the heat receiving side shell 6 are arranged in a plane along the vertical direction, and the heating line 8 snakes through the heat receiving side shell 6 and each of the heat receiving fins 7. The plate 7a is penetrated a plurality of times. In this way, the contact area between the heating line 8 and the heat receiving fin 7 is ensured as large as possible, and the heat from the heat receiving fin 7 is efficiently transmitted to the heating line 8.

  The heat transfer body 7a constituting the heat receiving fins 7 is not limited to the plate shape mentioned here, but can take a rod shape, a tube shape, a fiber shape, and other various shapes like the heat transfer body 5a of the heat sink 5 described above. Further, the heating line 8 can take various flow path configurations other than those exemplified here. In any case, it is sufficient that a sufficient contact area is ensured between the heat receiving fins 7 and the heating line 8 and heat exchange can be performed efficiently.

  The heat radiation side shell 4 that forms the outer shell of the heat radiation side unit 2 and the heat reception side shell 6 that forms the outer shell of the heat reception side unit 3 are disposed adjacent to each other, and the heat radiation side shell 4 and the heat reception side shell 6 communicate with each other. It is in contact via a hot plate 9. The heat transfer plate 9 is connected to the heat sink 5 in the heat radiating side shell 4 and is connected to the heat receiving fins 7 in the heat receiving side shell 6. In other words, the heat sink 5 and the heat receiving fin 7 are adjacent to each other with the heat transfer plate 9 interposed therebetween.

  The heat transfer plate 9 needs to have a strength to isolate the heat-radiating side shell 4 and the heat-receiving side shell 6 from each other and to withstand the pressure of the heat-radiating side shell 4 and the heat-receiving side shell 6. On the other hand, in terms of heat transfer from the heat sink 5 to the heat receiving fin 7, the heat transfer plate 9 should be as thin as possible. However, if the material is a metal, it is considered that there is no problem as long as the thickness is about several tens of millimeters. . When the heat transfer plate 9 is made of stainless steel, if the thickness is, for example, about 5 mm to 10 mm, both strength and heat transfer can be satisfied.

  Here, in FIG. 1, the heat transfer plate 9 is illustrated as a single plate, but the configuration of the heat transfer plate 9 is not limited thereto. For example, the heat transfer plate 9 is composed of two pieces on the heat sink 5 side and the heat receiving fin 7 side, the heat transfer body 5a constituting the heat sink 5 is welded to one side of one heat transfer plate 9, and the other heat transfer plate It is also possible to join the heat transfer plates 9 together after welding the heat transfer bodies 7 a constituting the heat receiving fins 7 to one side of the heat transfer fins 9. At that time, for example, a partition plate between the heat radiation side shell 4 and the heat reception side shell 6 may be sandwiched between the heat transfer plates 9. In this case, the partition plate looks like a part of the heat transfer plate 9, but if the partition plate is a metal, there is no functional problem in terms of heat transfer. Alternatively, the partition plate between the heat radiation side shell 4 and the heat reception side shell 6 can be configured by the heat transfer plate 9 itself (in other words, the entire partition plate can be configured to function as the heat transfer plate 9). In addition, the heat transfer plate 9 can have various configurations as long as it has sufficient heat transfer properties and does not hinder the isolation between the heat radiation side shell 4 and the heat reception side shell 6.

  The space in the heat receiving side shell 6 surrounding the heating line 8 is sealed, so that the heated fluid L is not leaked to the external environment in the event that a leakage occurs in the heating line 8. The space in the heat receiving side shell 6 is filled with a heat medium so as to assist heat transfer from the heat transfer plate 9 to the heat receiving fins 7 or the heating lines 8 as necessary. As the heat medium, for example, an inert gas such as nitrogen or a liquid such as fat or oil can be used.

  The heat sink 5, the heat receiving fin 7, and the heat transfer plate 9 are made of a material having sufficient strength, heat resistance, and thermal conductivity, and for example, stainless steel can be used. As a material having higher thermal conductivity, for example, an aluminum alloy may be used. However, since the melting point is lower than that of stainless steel, it is not suitable for a portion that is too hot. Further, when high heat resistance is required, for example, high chromium steel may be used, but this has a property of becoming brittle at low temperatures. Therefore, for example, it is conceivable that the high temperature heat sink 5 or the heat transfer plate 9 is made of high chromium steel, and the heat receiving fins 7 that are in contact with the low temperature fluid (LNG) L are made of aluminum. However, in this case, since there is a concern about the occurrence of corrosion due to contact between different metals, in that sense, it is easier to configure the whole with stainless steel (exactly, the exhaust gas in which the heating fluid G burns natural gas). In the case of gas, it is considered that the problem of corrosion does not occur so much because it contains almost no corrosive substances. In any case, as a material of the heat sink 5, the heat receiving fin 7, and the heat transfer plate 9, a suitable material may be selected in consideration of various conditions.

  FIG. 3 shows an example of the configuration of a heat exchange system using the heat exchanger 1 as described above. Of the heat exchanger 1, the heat radiation side shell 4 constituting the outer shell of the heat radiation side unit 2 is, for example, an exhaust heat line (exhaust duct) 11 of a heat radiation facility 10 such as a power plant using natural gas as an energy source. Provided on the way. In the exhaust heat line (exhaust duct) 11, a heating fluid (exhaust gas) G including exhaust heat from the heat radiating equipment (power generation plant) 10 circulates, and the exhaust gas G passes through the heat radiating side shell 4. It is like that.

  Further, the exhaust duct 11 is provided with a bypass line 12 so as to bypass the heat radiation side unit 2, and a bypass valve 13 is provided in the middle of the bypass line 12, so that the bypass line 12 can be opened and closed as necessary. It has become.

  As described above, the heat receiving side unit 3 is provided so as to be adjacent to the heat radiating side unit 2, and the fluid to be heated (LNG) L flows through the heat receiving side shell 6 that forms the outer shell of the heat receiving side unit 3. A heating line 8 is passed.

  The upstream side of the heating line 8 is connected to a heated fluid tank 14 that stores the heated fluid L via an introduction line 15, from which the heated fluid L in a liquid state is introduced and the heat receiving side shell 6. It is heated and vaporizes while passing through. In the case of the present embodiment, the vaporized heated fluid L is supplied from the supply line 16 to the heat dissipating equipment 10 that is a power plant, and is used as fuel. A flow rate adjusting valve 17 is provided in the middle of the introduction line 15 so that the flow rate of the heated fluid L introduced from the heated fluid tank 14 to the heating line 8 can be adjusted here.

  A pressure sensor 18 and a temperature sensor 19 are provided at appropriate positions of the heat receiving side unit 3 so that the state in the heat receiving side unit 3 can be monitored. The pressure sensor 18 is attached to, for example, an appropriate portion of the heat receiving side shell 6 and detects the pressure in the heat receiving side shell 6. The temperature sensor 19 is a thermocouple attached to appropriate positions such as the heat transfer plate 9 in the heat receiving side shell 6, the plate 7 a constituting the heat receiving fin 7, the heating line 8, and the like. In FIG. 3, the mounting positions of the pressure sensor 18 and the temperature sensor 19 are shown in the vicinity of the heat receiving side shell 6, but this is only a schematic view, and the pressure sensor 18 and the temperature sensor 19 are the heat receiving side unit 3. It may be installed anywhere as long as the pressure and temperature can be properly grasped. The pressure value detected by the pressure sensor 18 and the temperature value detected by the temperature sensor 19 are sent, for example, to the control device 20 installed in the heat radiation facility 10 as a pressure signal 18a and a temperature signal 19a, respectively.

  Further, the control device 20 inputs an opening / closing signal 13 a to the bypass valve 13, instructs opening / closing of the bypass valve 13, operates the inflow of the exhaust gas G to the bypass line 12, and outputs an opening signal to the flow rate adjustment valve 17. 17a is input, and the flow rate of the heated fluid L sent from the heated fluid tank 14 through the opening degree of the flow rate adjusting valve 17 is adjusted.

  Then, the control device 20 monitors the state of the heat receiving side unit 3 based on the pressure signal 18a and the temperature signal 19a described above, and based on this, the flow rate of the exhaust gas G flowing into the heat radiating side shell 4, The flow rate of the heating fluid L is managed. Specifically, the pressure signal 18a and the temperature signal 19a are input to the control device 20 every moment. Here, for example, when the temperature detected as the temperature signal 19a becomes equal to or higher than a predetermined reference value, A command to open the bypass valve 13 is input from the control device 20 by the open / close signal 13a, the bypass line 12 is opened, the exhaust gas G flowing into the heat radiation side shell 4 is reduced, the heat received by the heat sink 5 is reduced, and the heat received The temperature of the side unit 3 will decrease. Alternatively, when the temperature is equal to or higher than the reference value, an instruction to increase the opening degree of the flow rate adjusting valve 17 is input by the opening degree signal 17a, and the introduction of the heated fluid L from the heated fluid tank 14 increases. The temperature of the heat receiving side unit 3 may be lowered. In some cases, these two types of processing can be used in combination. Thus, the temperature in the heat receiving side unit 3 and the heating amount or vaporization amount of the heated fluid (LNG) L can be appropriately managed.

  Further, when the pressure detected as the pressure signal 18a rapidly increases, an opening signal 17a is input from the control device 20 so as to make the opening of the flow rate adjusting valve 17 zero. It is also possible to stop the introduction of the fluid L to be heated.

  In addition, although illustration is abbreviate | omitted, in the heat exchange system of a present Example, you may provide various sensors other than the above-mentioned pressure sensor 18 and the temperature sensor 19 in an appropriate position. For example, a pressure sensor is installed before and after the heat radiating side unit 2 in the exhaust heat line 11 and is monitored by the control device 20, and a warning that prompts cleaning of the heat sink 5 is issued when the differential pressure rises above a predetermined level. be able to. Further, a temperature sensor or a pressure sensor may be installed in the introduction line 15 or the supply line 16 so that the flow rate is managed while monitoring the temperature or pressure of the heated fluid L.

  In the case of the present embodiment, an emergency extraction device 22 for releasing the pressure in the heat receiving side shell 6 through the safety valve 21 is installed in the heat receiving side shell 6. The safety valve 21 opens as the pressure in the heat receiving side shell 6 increases, and discharges the fluid in the heat receiving side shell 6 to the extraction device 22. That is, when the pressure in the heat receiving side shell 6 increases abnormally, there is a concern about leakage of the heated fluid L from the heating line 8 due to breakage of the heating line 8 or the like. In order to process, it is made to extract to the extraction device 22 side. The extraction device 22 is, for example, a vent stack, a flare stack, or a tank that stores the heated fluid L, and the fluid including the heated fluid L is safely processed in the extraction device 22.

  As described above, in this embodiment, the heat-dissipation side unit 2 of the heat exchanger 1 provided with the heat energy normally disposed in the atmosphere together with the exhaust gas G in the middle of the exhaust heat line (exhaust duct) 11. And used for vaporization of the heated fluid (LNG) L. Since exhaust heat is used effectively, fuel for heating the fluid L to be heated is unnecessary, and running costs can be reduced. Further, compared to the case of using an open rack heat exchanger that uses air or water in the surrounding environment as a heat source, it is less susceptible to the influence of air temperature, seawater temperature, and the like.

  At that time, the intermediate fluid is not used for heat exchange between the heated fluid (exhaust gas) G and the heated fluid L, and the heated fluid L is obtained by static heat exchange via the heat sink 5, the heat receiving fins 7 and the heat transfer plate. Therefore, complicated piping for circulating the intermediate medium and a pump as power are unnecessary. Therefore, the initial cost for construction can be reduced, and the running cost for the power of the pump, the labor for maintenance, and the like can be reduced.

  Further, in the heat exchange system of the present embodiment, the fluid L to be heated is LNG, and the natural gas evaporated from LNG in the heat exchanger 1 is used in the heat dissipating equipment 10 that is a power generation plant. Since the exhaust heat is used to heat the fluid L to be heated, the heat radiation facility 10 and the heat exchange system associated therewith can be made more efficient in terms of energy.

  At this time, since natural gas obtained by vaporizing LNG is used as the fuel in the heat dissipating equipment 10, the exhaust gas G, which is a heating fluid, is clean as compared with the case where coal or the like is used as the fuel. Therefore, corrosion and the like are unlikely to occur in the heat radiation side unit 2 through which the exhaust gas G flows, and maintenance work such as cleaning can be reduced.

  Although the heat dissipating equipment 10 is described here as a power plant, the heat exchanging system of the present invention is not limited to this, and the heating fluid G including exhaust heat is also generated in other chemical plants and various factories. Any equipment that can do this can be widely applied. Moreover, in the above-mentioned Example, although it has comprised so that the gas which vaporized the to-be-heated fluid (LNG) L in the heat exchanger 1 may be utilized with the thermal radiation equipment 10, such a structure does not necessarily need to be taken, but heating The facility that uses the heated fluid L later and the facility that generates exhaust heat for heating the heated fluid L (heat radiation facility 10) may be separate facilities. The fluid L to be heated is not limited to LNG, but may be, for example, liquefied ethylene or the like. Any fluid that requires heating can be widely used regardless of liquid or gas. Various fluids can be similarly applied to the heating fluid G. For example, if the heat radiation facility 10 is a facility that discharges exhaust heat as warm water, this warm water can be used as the heating fluid G.

  In the above-described embodiment, the heating fluid (exhaust gas) G circulates in the heat dissipation side shell 4 along the horizontal direction, and the heating line 8 meanders in the S shape in the heat receiving side shell 6. In the above description, the heated fluid L is introduced from the inlet 8a along the horizontal direction and discharged from the outlet 8b along the horizontal direction. However, the configurations of the heat radiation side shell 4 and the heating line 8 are limited thereto. Instead, it can take various arrangements and forms. For example, although illustration is omitted, when the exhaust heat line (exhaust duct) 11 extends along the vertical direction, the heat radiation side unit 2 is provided in the middle, and the heat reception side is adjacent to the heat radiation side unit 2. It can also be set as the structure provided with the unit 3. FIG. In this case, if the heat transfer body 5a constituting the heat sink 5 is formed in a plate shape, the heat transfer body 5a that is the plate is arranged with a surface along the vertical direction. At that time, the heating line 8 does not meander in the heat receiving side shell 6, and the heated fluid L introduced from the inlet 8 a provided in the lower part of the heat receiving side shell 6 is linearly upward in the heat receiving side shell 6. It is good also as a structure guided and extracted from the exit 8b provided in the upper part of the heat receiving side shell 6. FIG. In addition, the heat radiation side shell 4, the heat sink 5, the heating line 8, and the like can have various configurations as long as the heated fluid L can be suitably heated.

  As described above, the heat exchanger 1 of the present embodiment includes the heat sink 5 that recovers heat from the heating fluid (exhaust gas) G in the heat radiation side shell 4 through which the heating fluid (exhaust gas) G passes. The heat receiving side unit 2, the heat receiving side unit 3 including the heating line 8 for circulating the heated fluid (LNG) L in the heat receiving side shell 6, and the heat receiving fins 7 connected thereto, the heat sink 5 and the heat receiving Since the heat transfer plate 9 sandwiched between the fins 7 is provided, an intermediate medium is not used for heat exchange, and static heat exchange via the heat sink 5, the heat receiving fins 7 and the heat transfer plate 9 is performed. The heated fluid L can be efficiently heated. Piping and a pump for circulating the intermediate medium are unnecessary, and it is possible to reduce initial costs for construction, running costs for fuel, etc., labor for maintenance, and the like. In addition, since exhaust heat is used effectively, fuel for heating and the like is unnecessary, and it is difficult to be affected by the temperature of the surrounding environment.

  Further, in the heat exchanger 1 of this embodiment, the heat receiving side shell 6 can be filled with a heat medium, and in this way, heat from the heat transfer plate 9 to the heat receiving fins 7 or the heating line 8 can be obtained. Can assist in transmission.

  Moreover, according to the heat exchange system of a present Example, the same effect as the heat exchanger 1 can be acquired by providing the above-mentioned heat exchanger 1. FIG.

  In addition, the heat exchange system of the present embodiment includes a bypass line 12 that bypasses the heat radiating side unit 2 in the exhaust heat line (exhaust duct) 11, monitors the temperature of the heat receiving side unit 3, and The bypass line 12 can be opened and closed according to the temperature of the unit 3, and the flow rate of the heating fluid (exhaust gas) G flowing through the heat radiation side shell 4 can be adjusted. 3 and the heating amount of the heated fluid (LNG) L can be appropriately managed.

  Further, the heat exchange system of the present embodiment monitors the temperature of the heat receiving side unit 3 and adjusts the flow rate of the heated fluid (LNG) L flowing in the heating line 8 according to the temperature of the heat receiving side unit 3. Even if it does in this way, the temperature in the heat receiving side unit 3 and the heating amount of the to-be-heated fluid (LNG) L can be managed appropriately.

  Further, the heat exchange system of the present embodiment is provided with an extraction device 22 through the safety valve 21 in the heat receiving side shell 6, and the safety valve 21 is opened as the pressure in the heat receiving side shell 6 increases, The fluid in the heat receiving side shell 6 can be configured to be discharged to the extraction device 22, and in this way, when leakage of the heated fluid (LNG) L occurs in the heat receiving side shell 6, It is possible to prevent the heated fluid (LNG) L from leaking to the surrounding environment and safely process the heated fluid (LNG) L.

  In the heat exchange system of the present embodiment, the heated fluid L flowing into the heating line 8 is liquefied natural gas (LNG), and the heated fluid (exhaust gas) G flowing into the heat radiation side shell 4 is Since the exhaust gas is from the heat dissipating facility (power generation plant) 10 that uses the gas vaporized in the heat receiving side unit 3, the heat dissipating facility 10 and the heat exchange system associated therewith can be made more efficient in terms of energy. it can.

  Therefore, according to the present embodiment, heat exchange can be suitably performed between the heated fluid and the heat source regardless of the circulation of the intermediate medium.

  In addition, the heat exchanger and heat exchange system of this invention are not limited only to the above-mentioned Example, Of course, a various change can be added in the range which does not deviate from the summary of this invention.

DESCRIPTION OF SYMBOLS 1 Heat exchanger 2 Heat radiation side unit 3 Heat reception side unit 4 Heat radiation side shell 5 Heat sink 6 Heat reception side shell 7 Heat reception fin 8 Heating line 9 Heat transfer plate 10 Heat radiation equipment (power generation plant)
11 Waste heat line (exhaust duct)
12 Bypass line 21 Safety valve 22 Extraction device G Heating fluid (exhaust gas)
L Heated fluid (LNG)

Claims (7)

A heat dissipating side shell installed in the exhaust heat line through which the heated fluid containing the exhaust heat flows and passing the heated fluid through the inside; a heat sink disposed inside the heat dissipating side shell and recovering heat from the heated fluid; , A heat dissipation side unit equipped with,
A heat receiving side shell disposed adjacent to the heat radiating side shell, a heating line through which a fluid to be heated flows in the heat receiving side shell, and a heat receiving member connected to the heating line and disposed adjacent to the heat sink. A heat-receiving-side unit comprising fins;
A heat exchanger comprising: a heat transfer plate sandwiched between the heat sink and the heat receiving fin.   The heat exchanger according to claim 1, wherein the heat receiving side shell is filled with a heat medium.   A heat exchange system comprising the heat exchanger according to claim 1. With a bypass line that bypasses the heat radiating side unit in the exhaust heat line,
The heat according to claim 3, wherein the temperature of the heat receiving side unit is monitored, the bypass line is opened and closed according to the temperature of the heat receiving side unit, and the flow rate of the heating fluid flowing through the heat radiating side shell is adjusted. Exchange system.   5. The heat exchange system according to claim 3, wherein the temperature of the heat receiving side unit is monitored, and the flow rate of the fluid to be heated flowing in the heating line is adjusted according to the temperature of the heat receiving side unit.   The heat receiving side shell is provided with an extraction device via a safety valve, and the safety valve opens as the pressure in the heat receiving side shell increases, and the fluid in the heat receiving side shell is discharged to the extraction device. The heat exchange system according to any one of claims 3 to 5.   The heated fluid that flows into the heating line is liquefied natural gas, and the heated fluid that flows into the heat radiation side shell is exhaust gas from a heat radiation facility that uses gas vaporized in the heat receiving side unit. The heat exchange system as described in any one of 3-6.

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