WO2016139712A1

WO2016139712A1 - Heat exchange device and fuel gas generation device

Info

Publication number: WO2016139712A1
Application number: PCT/JP2015/056061
Authority: WO
Inventors: 泰孝和田; 幸彦松村; 良文川井; 琢史野口
Original assignee: 中国電力株式会社; 国立大学法人広島大学; 中電プラント株式会社; 株式会社東洋高圧
Priority date: 2015-03-02
Filing date: 2015-03-02
Publication date: 2016-09-09
Also published as: JPWO2016139712A1; JP6093918B2

Abstract

The present invention is provided with the following: a first piping inside of which a slurry moves so as to perform heat exchange with an external first fluid; a second piping that is connected to the first piping at the downstream side of the first piping so that the slurry supplied from the first piping moves inside the second piping; and a heating device that heats the second piping so that the amount of the slurry adhered to the inner wall of the second piping becomes less than a prescribed amount.

Description

Heat exchange device, fuel gas generator

The present invention relates to a heat exchange device and a fuel gas generation device.

For example, a heat exchange device having a pipe through which a slurry body moves so that heat exchange with an external fluid is performed is known (for example, Patent Document 1).

JP 2007-269945 A

For example, in the heat exchange device of Patent Document 1, when the amount of the slurry body adhering to the inner wall of the pipe increases, the pipe is blocked and heat exchange between the slurry body and the external fluid is difficult to be performed. There is a fear.

The main present invention that solves the above-described problems is a first pipe in which a slurry body moves so that heat exchange is performed with an external first fluid, and the slurry body supplied from the first pipe. The amount of the slurry body adhering to the second pipe coupled to the first pipe on the downstream side of the first pipe and the inner wall of the second pipe is smaller than a predetermined amount so that the inside moves. And a heating device that heats the second pipe.

Other features of the present invention will become apparent from the accompanying drawings and the description of the present specification.

According to the present invention, it is possible to prevent a clogging trouble in the outlet pipe of the heat exchange device and to improve the heat passage rate by the heat exchange device.

It is a block diagram which shows the supercritical gasifier in 1st and 2nd embodiment of this invention. It is a perspective view which shows the heat exchanger in 1st Embodiment of this invention. It is a top view which shows the heat exchanger in 1st Embodiment of this invention. It is a section perspective view showing the double pipe in a 1st embodiment of the present invention. It is a side view which shows piping of the state to which the product in 1st Embodiment of this invention adhered. It is a side view which shows piping of the state from which the product in 1st Embodiment of this invention peeled. It is a top view which shows the heat exchanger in 2nd Embodiment of this invention.

At least the following matters will become apparent from the description of this specification and the accompanying drawings.
[First embodiment]
=== Supercritical gasifier ===
Hereinafter, the supercritical gasifier in the present embodiment will be described with reference to FIG. FIG. 1 is a block diagram showing a supercritical gasifier in the present embodiment.

The supercritical gasifier 100 (fuel gas generator) is a device that generates fuel gas from a gasification raw material or the like. The supercritical gasifier 100 includes a raw material adjustment unit 10, a raw material supply unit 20, a heat exchange unit 30, a gasification processing unit 40, and a fuel generation unit 50.

The raw material adjustment unit 10 is a part that adjusts a raw material slurry (also referred to as “slurry body” or “raw material”) from a gasification raw material or the like, and includes an adjustment tank 11 and a crusher 12.

The adjustment tank 11 is a container for preparing a suspension by mixing gasification raw materials, activated carbon, water, and the like, and is provided with a stirring blade (not shown). As the gasification raw material, for example, shochu residue, egg-collected chicken manure, and sludge can be used. Activated carbon functions as a nonmetallic catalyst, and porous particles having an average particle diameter of 200 μm or less can be used.

The crusher 12 is a device for crushing the solid content (mainly gasification raw material) contained in the suspension mixed in the adjustment tank 11 to obtain a uniform size. In this embodiment, crushing is performed so that the average particle size of the solid content is 500 μm or less. Due to crushing by the crusher 12, the suspension becomes a raw slurry.

The raw material supply unit 20 is a part that feeds the raw material slurry at a high pressure, and includes a supply pump 21 and a high pressure pump 22. The supply pump 21 is a device for supplying the raw slurry sent from the crusher 12 toward the high-pressure pump 22. The high-pressure pump 22 is a device for sending the raw slurry at high pressure. The raw material slurry is pressurized to about 0.1 to 4 MPa by the high-pressure pump 22.

The heat exchange unit 30 heats the raw material slurry by causing heat exchange between the raw material slurry supplied from the raw material supply unit 20 and the processed fluid after being decomposed by the gasification processing unit 40. At the same time, it is a part that cools the processed fluid. The heat exchange unit 30 includes a heat exchanger 6 (heat exchange device) and a cooler 32.

The heat exchanger 6 is a device that exchanges heat between the raw slurry and the treated fluid, and a double tube type is used. The inner channel is used as a low temperature side channel through which the raw material slurry flows, and the outer channel is used as a high temperature side channel through which the treated fluid flows. In this embodiment, the introduction temperature of the treated fluid is about 600 ° C., and the discharge temperature is about 120 ° C. On the other hand, the introduction temperature of the raw slurry is normal temperature and the discharge temperature is about 450 ° C. The heat exchanger 6 will be described later. The cooler 33 is a device that cools the processed fluid discharged from the heat exchanger 6.

The gasification processing unit 40 is a part that heats the raw material slurry heated by the heat exchanger 6 to a supercritical state and decomposes organic substances contained in the raw material slurry, and has a preheater 41 and a gasification reactor 42. ing. The preheater 41 is a device for preheating the raw material slurry discharged from the heat exchanger 6, and in this embodiment, the raw material slurry introduced at about 450 ° C is heated to about 600 ° C. The gasification reactor 42 is an apparatus for decomposing organic substances contained in the raw material slurry while maintaining the raw material slurry in a supercritical state. In this embodiment, the temperature is set to 600 ° C. and the pressure is set to 25 MPa, and the raw material slurry is decomposed for 1 to 2 minutes.

The fuel generator 50 generates fuel gas from the processed fluid. The fuel generator 50 includes a decompressor 51, a gas-liquid separator 51, a catalyst recovery unit, and a gas tank 54.

The decompressor 51 decompresses the processed fluid cooled by the cooler 32. The gas-liquid separator 52 separates the processed fluid decompressed by the decompressor 51 into a gas (fuel gas) and a liquid (drainage, activated carbon, ash). Then, the separated liquid is discharged via the catalyst recovery unit 53. On the other hand, the separated gas is stored in the gas tank 54.
=== Heat exchanger ===
Hereinafter, with reference to FIG. 2 thru | or FIG. 4, the heat exchanger in this embodiment is demonstrated. FIG. 2 is a perspective view showing a heat exchanger in the present embodiment. FIG. 3 is a plan view showing the heat exchanger in the present embodiment. FIG. 4 is a cross-sectional perspective view showing the double tube in the present embodiment. FIG. 4 shows the double pipe 61 in a state viewed from a cross section substantially orthogonal to the longitudinal direction of the double pipe 61. A part of the inner tube 612 is indicated by a broken line for convenience of explanation.

The heat exchanger 6 is a device that exchanges heat between the slurry body and the treated fluid. The processed fluid is a slurry body processed by the gasification processing unit 40.

The heat exchanger 6 has a double pipe 61, pipes 62 to 65, and a heating device 7.

The double pipe 61 has an outer pipe 611 and an inner pipe 612. The inner pipe 612 is, for example, a metal pipe through which the slurry body moves. The inner tube 612 is inserted into the outer tube 611 so that a gap for moving the processed fluid is formed between the inner tube 612 and the outer tube 611. The inner side of the inner pipe 612 corresponds to the inner flow path, and the gap between the inner pipe 612 and the outer pipe 611 corresponds to the outer flow path. The outer tube 611 is, for example, a metal pipe through which the inner tube 612 is inserted.

The double pipe 61 is centered on a winding axis (not shown) along the vertical direction (Z axis) so that the length of the double pipe 61 can be relatively long in a relatively narrow space. It is wound in a spiral. That is, the outer tube 611 and the inner tube 612 are both spirally wound.

The

pipes

62 and 63 are coupled to one end of the double pipe 61 via a coupling portion P2 provided on the upper side (+ Z) from the coupling portion P1. The pipe 62 is coupled so as to communicate with the inner flow path. The pipe 63 is coupled so as to communicate with the outer flow path.

The

pipes

64 and 65 are coupled to the other end of the double pipe 61 through a coupling part P1 provided on the lower side (−Z) than the coupling part P2. The pipe 65 is coupled so as to communicate with the inner flow path. The pipe 64 is coupled so as to communicate with the outer flow path.

The slurry body is supplied to the pipe 65 from the raw material supply unit 20. This slurry body is supplied to the gasification processing unit 40 via the inner flow path of the double pipe 61 and the pipe 62. Further, the post-treatment fluid is supplied to the pipe 63 from the gasification processing unit 40. The post-treatment fluid is supplied to the cooler 32 via the outer flow path of the double pipe 61 and the pipe 64. That is, in the double pipe 61, the flow direction of the slurry body and the flow direction of the processed fluid are opposed to each other.

The heating device 7 is a device that heats the pipe 62 so that the amount of the product T1 adhering to the inner wall of the pipe 62 is less than a predetermined amount.
=== Product, heating device ===
Hereinafter, the product in the present embodiment will be described with reference to FIGS. 5 and 6. FIG. 5 is a side view showing the pipe with the product attached thereto in the present embodiment. FIG. 6 is a side view showing the pipe with the product peeled in the present embodiment.
= Product =
For example, since the pipe 62 is connected to the preheater 41, the pipe 62 may have a bent portion 62A depending on the arrangement of the equipment. For example, the product T1 (slurry body) may adhere to the bent portion 62A of the pipe 62 and the inner wall near the bent portion 62A on the downstream side of the bent portion 62A. This is based on, for example, the change in the moving speed and moving direction of the slurry body in the bending portion 62A. For example, the slurry body comes into contact with the inner wall of the pipe at a position where the moving direction of the slurry body changes suddenly, but the position is also a position where the moving speed is reduced, so that the product T1 adheres and is easily laminated. The product T1 is, for example, tar and char generated when the slurry body is heated.

When the amount of the product T1 attached to the inner wall of the pipe 62 increases, for example, the movement of the slurry body may be hindered by the attached slurry body. In this case, since the movement of the slurry body is also hindered in the heat exchanger 6, the moving speed of the slurry body is reduced, and the slurry body adheres to the inner wall of the heat exchanger 6. The heat transfer rate with the fluid may be reduced. When the amount of the product T1 adhering to the inner wall of the pipe 62 further increases, for example, the pipe 62 may be blocked. In this case, it may be difficult for another supercritical gasifier having another heat exchanger to generate the fuel gas.

Therefore, in the heat exchanger 6, the amount of the product T1 adhering to the inner wall of the pipe 62 needs to be smaller than a predetermined amount. The predetermined amount may be, for example, an amount that does not block the pipe 62, and the heat exchanger 6 has a heat passage rate that allows the temperature of the slurry discharged from the pipe 62 to be about 450 ° C. It is good also as a quantity defined based on experiment or simulation whether it can be maintained in.
= Heating device =
The heating device 7 is a heater that heats the bent portion and the downstream side of the pipe 62. The heating device 7 applies heat to the pipe 62 so that the temperature of the pipe 62 is higher than the temperature of the slurry body moving inside the pipe 62. This is because the product T1 adhering to the inner wall of the pipe 62 is peeled off based on the relationship between the viscosity of the product T1 and the temperature that the viscosity of the product T1 decreases as the temperature rises. This is a configuration for making it difficult for the product T1 to adhere to the inner wall.

For example, when the product T1 adheres to the inner wall of the pipe 62 and is stacked and the flow path in the pipe 62 is narrowed, the average velocity of the fluid increases at the closed portion, so that the inner wall of the pipe 62 is expressed as shown in Equation (1). The shear stress acting on the deposit is increased, and a phenomenon that the product T1 adhered to the inner wall is peeled off from the inner wall can be expected.

(Where τ _{w is} the shear stress acting on the deposit on the inner wall of the pipe, f is the friction coefficient, ρ is the density of the fluid, u is the average velocity of the fluid)
When heat is applied from the heating device 7 to the pipe 62, the temperature of the pipe 62 rises, and the viscosity of the portion of the product T1 adhering to the pipe 62 decreases, so that it adheres to the inner wall of the pipe 62. The product T1 that has been peeled off from the contact portion with the inner wall of the pipe 62 due to the increase in the shear stress. Further, after that, since the temperature of the pipe 62 is higher than the temperature of the slurry body in the pipe 62, the product T1 is difficult to adhere to the inner wall of the pipe 62. In contrast, when the heating device is not installed, the temperature of the pipe 62 is lowered because it is cooled by the outside air, and the viscosity of the portion of the product T1 adhering to the pipe 62 increases accordingly. Therefore, the product T1 adhering to the inner wall of the pipe 62 is difficult to peel off from the inner wall of the pipe 62, so that the blockage of the pipe 62 cannot be avoided even if the shear stress increases.

Therefore, by heating the pipe 62 with the heating device 7, the amount of the product T1 adhering to the inner wall of the pipe 62 can be made smaller than a predetermined amount. The temperature of the pipe 62 rising by the heating device 7 and the amount of heat applied from the heating device 7 to the pipe 62 confirm whether or not the amount of the product T1 adhering to the inner wall of the pipe 62 is smaller than a predetermined amount. For example, it may be determined based on confirmation experiments or simulations.

In addition, in this embodiment, although it has demonstrated that a heating apparatus is installed in the bending part and downstream of the piping 62, it is not limited to this. You may heat only the bending part with much adhesion of a slurry body. Moreover, you may heat only the downstream side which can anticipate the heating of a bending part by heat transfer.
=== Operation of heat exchanger ===
Hereinafter, the operation of the heat exchanger in the present embodiment will be described with reference to FIGS. 1, 3, and 6.

The raw material adjusting unit 10 adjusts (generates) a slurry body from a gasification raw material or the like. The raw material supply unit 20 pressurizes the slurry body adjusted by the raw material adjustment unit 10 and supplies it to the pipe 65 in the heat exchanger 6. The slurry body supplied from the raw material supply unit 20 to the pipe 65 is supplied to the gasification processing unit 40 via the inner flow path and the pipe 62. At this time, since the heating device 7 is heating the pipe 62, for example, the product T1 is separated from the inner wall of the pipe 62 and flows downstream, so that the flow of the pipe 62 is not hindered. Therefore, the flow of the heat exchanger 6 located upstream of the pipe 62 is not hindered, and the amount of the product T1 adhering to the heat transfer surface of the heat exchanger 6 is less than a predetermined amount. Therefore, the heat transfer rate between the slurry body and the treated fluid in the heat exchanger 6 can be improved.

The gasification processing unit 40 heats the slurry body heated by the heat exchanger 6 and supplied to the gasification processing unit 40 to generate a post-processing fluid. The post-treatment fluid generated by the gasification processing unit 40 is supplied to the pipe 63 in the heat exchanger 6. The processed fluid supplied from the gasification processing unit 40 to the pipe 63 is supplied to the fuel generation unit 50 via the outer flow path, the pipe 64, and the cooler 32. Thereafter, the fuel generator 50 generates fuel gas from the supplied processed fluid.

As described above, the heat exchanger 6 includes the double pipe 61, the pipe 62, and the heating device 7. In the inner pipe 612 of the double pipe 61, the slurry body moves inside so that heat exchange is performed with an external post-treatment fluid. The pipe 62 is coupled in a state bent from the inner pipe 612 on the downstream side of the inner pipe 612 so that the slurry supplied from the inner pipe 612 moves inside. The heating device 7 heats the pipe 62 so that the amount of the slurry body attached to the inner wall of the pipe 62 is less than a predetermined amount. Therefore, the heat passage rate of the heat exchanger 6 can be improved. Further, the pipe 62 is prevented from being blocked by the product T1, and the slurry body can be reliably supplied from the heat exchanger 6 to the gasification processing unit 40. That is, the fuel gas can be reliably generated in the supercritical gasifier 100.

Further, the heating device 7 heats the pipe 62 so that the temperature of the pipe 62 becomes higher than the temperature of the slurry body inside the pipe 62. Therefore, the product T1 adhering to the inner wall of the pipe 62 can be reliably peeled off.

The heating device 7 is a heater that applies heat to the downstream side of the pipe 62. Therefore, at the position where the concentration of the product T1 tends to be high, the product T1 adhering to the inner wall can be reliably peeled off by setting the temperature of the pipe 62 to be relatively high.
[Second Embodiment]
The supercritical gasifier 100B (FIG. 1) of the second embodiment is obtained by changing the heat exchanger 6 in the supercritical gasifier 100 of the first embodiment to a heat exchanger 700. The configuration of the supercritical gasifier 100B other than the heat exchanger 700 is the same as the configuration of the supercritical gasifier 100.
=== Supercritical gasifier, heat exchanger ===
Hereinafter, with reference to FIG.1 and FIG.7, the supercritical gasification apparatus and heat exchanger in this embodiment are demonstrated. FIG. 7 is a plan view showing a heat exchanger in the present embodiment. The same reference numerals are given to the same components as those shown in FIG. 3, and the description thereof will be omitted.

The supercritical gasifier 100B has a heat exchanger 700.

The heat exchanger 6 has a double pipe 71 and

pipes

72 and 73.

One end of the double pipe 71 on the coupling part P4 side (+ X) has a shape bent at the bending part 71A. The configuration other than the configuration of one end of the double tube 71 is the same as the configuration of the double tube 61.

The

pipes

72 and 73 are coupled to one end of the double pipe 71 through the coupling part P4. The pipe 72 is coupled so as to communicate with the inner flow path of the double pipe 71. The pipe 73 is coupled so as to communicate with the outer flow path of the double pipe 71.

The inner pipe at one end of the double pipe 71 is heated by the processed fluid supplied to the pipe 73. That is, the treated fluid supplied to the pipe 73 and the outer pipe at one end of the double pipe 71 exhibit a function as a heating device.

Here, the temperature of the treated fluid supplied to the pipe 73 is higher than the temperature of the slurry body. For this reason, the inner pipe of the double pipe 71 is heated so that the temperature of the inner pipe of the double pipe 71 becomes higher than the temperature of the slurry body moving through the inner pipe of the double pipe 71. Therefore, the product adhering to the inner wall of the inner pipe of the double pipe 71 peels from the inner pipe. Therefore, the heat passage rate of the heat exchanger 700 can be improved. Further, the fuel gas can be reliably generated in the supercritical gasifier 100B.

The first and second embodiments are intended to facilitate understanding of the present invention and are not intended to limit the present invention. The present invention can be changed and improved without departing from the gist thereof, and the present invention includes equivalents thereof.

In the first embodiment, it has been described that the pipe 62 has a bent shape, but the present invention is not limited to this. For example, the pipe 62 may have a straight shape. That is, the pipe 62 may be a straight pipe. In this case, no bending portion is provided in the pipe 62, and the moving direction and moving speed of the slurry body inside the pipe 62 are substantially the same at each position in the cross section of the pipe 62. For this reason, the amount of the product T1 adhering to the inner wall of the pipe 62 becomes smaller than a predetermined amount.

Moreover, although 1st Embodiment demonstrated that the post-process fluid was supplied to the outer side flow path of the double pipe 61, it is not limited to this. For example, a fluid other than the post-treatment fluid may be supplied to the outer flow path of the double pipe 61. The temperature of the other fluid is set to be higher than the temperature of the slurry body supplied to the inner pipe 612.

Moreover, although 1st Embodiment demonstrated that the inner tube | pipe 612 was penetrated by the outer tube | pipe 611, it is not limited to this. For example, the inner pipe 612 may be provided in the storage tank. It is assumed that a fluid having a temperature higher than the temperature of the slurry supplied to the inner pipe 612 is stored in the storage tank. In this case, in the slurry body in the inner pipe 612, heat exchange is performed with the fluid stored in the storage tank.

Moreover, although 1st Embodiment demonstrated that the slurry body was supplied to the piping 65 from the raw material supply part 20, and the post-processing fluid was supplied to the piping 63 from the gasification process part 40, it is limited to this. is not. For example, the slurry body may be supplied to the pipe 62 from the raw material supply unit 20, and the post-treatment fluid may be supplied to the pipe 64 from the gasification processing unit 40. Further, for example, the slurry body may be supplied to the pipe 65 from the raw material supply unit 20, and the post-treatment fluid may be supplied to the pipe 64 from the gasification processing unit 40. For example, the pipe 62 may be supplied from the raw material supply unit 20. The slurry body may be supplied, and the processed fluid may be supplied from the gasification processing unit 40 to the pipe 63. In this case, in the double pipe 61, the flow direction of the slurry body and the flow direction of the processed fluid are the same direction.

In the first embodiment, the

pipes

62 and 65 communicate with the inner flow path, and the

pipes

63 and 64 communicate with the outer flow path. However, the present invention is not limited to this. For example, the

pipes

62 and 65 may communicate with the outer flow path, and the

pipes

63 and 64 may communicate with the inner flow path. In this case, the processed fluid moves in the inner flow path, and the slurry body moves in the outer flow path.

Further, a part of the double pipe 71 of the second embodiment 71 including the bent portion 71A (also referred to as “first part”) and a part of the double pipe 71 other than the first part (“second part”). A different fluid may be supplied to each of the outer flow paths without communicating with the outer flow paths of the “parts”. Note that the inner pipes of the first and second portions are in communication. In addition, the temperature of the different fluid supplied to each of the outer flow paths is such that the temperature of the outer tube of the first and second parts is higher than the temperature of the slurry body moving through the inner pipe of the first and second parts. It is assumed that it is set as follows.

In both the first embodiment and the second embodiment, even if the pipe 62 is a straight pipe, the flow is disturbed by the deposits on the inner wall, and there is a bent portion. Adhesion increases and stacks, and the pipe 62 may be blocked. For this reason, it is desirable to heat the pipe 66 and the pipe 74 immediately before being connected to the preheater 41 with the heating device 7.

6,700 Heat exchanger 30

Heat exchanger

61, 71

Double pipe

62, 63, 64, 65, 72, 73 Pipe 100, 100B Supercritical gasifier 611 Outer pipe 612 Inner pipe

Claims

A first pipe through which the slurry body moves so that heat exchange is performed with an external first fluid;
A second pipe coupled to the first pipe on the downstream side of the first pipe so that the slurry body supplied from the first pipe moves inside;
A heating device for heating the second pipe so that the amount of the slurry body adhering to the inner wall of the second pipe is less than a predetermined amount;
A heat exchange device comprising:
The heat exchanger according to claim 1, wherein the heating device heats the second pipe so that a temperature of the second pipe is higher than a temperature of the slurry body in the second pipe.
The heating device includes a third pipe through which the second pipe is inserted so that a second fluid having a temperature higher than the temperature of the slurry body moves through the gap between the second pipe and the second pipe. The heat exchange device according to claim 1 or 2, characterized by the above.
The heat exchanger according to claim 1 or 2, wherein the heating device inserts a third pipe through which the second fluid having a temperature higher than the temperature of the slurry body moves into the second pipe.
A third pipe through which the first pipe is inserted so that the first fluid moves through a gap between the first pipe and the first pipe;
The heating device includes a fourth pipe coupled to the third pipe so that the first fluid having a temperature higher than the temperature of the slurry body moves through the gap between the second pipe and the second pipe. The heat exchange device according to claim 2.
A third pipe inserted through the first pipe so that the first fluid moves through a gap between the first pipe and the first pipe;
The heat exchanging apparatus according to claim 2, wherein the heating device couples a fourth pipe through which the first fluid having a temperature higher than the temperature of the slurry body moves with the third pipe.
The slurry body is supplied from the first pipe and the first pipe through which the slurry body moves so that heat exchange for heating the slurry body as the gasification raw material is performed with the external first fluid. The amount of the slurry body adhering to the second pipe connected to the first pipe on the downstream side of the first pipe and the inner wall of the second pipe so that the slurry body moves inside is a predetermined amount. A heat exchange device having a heating device for heating the second pipe so as to be less than
A generator for generating fuel gas from the slurry body supplied via the first and second pipes;
A fuel gas generation device comprising:
The fuel gas generation device according to claim 7, wherein the heating device heats the second pipe so that a temperature of the second pipe is higher than a temperature of the slurry body in the second pipe.
The heating device includes a third pipe through which the second pipe is inserted so that a second fluid having a temperature higher than the temperature of the slurry body moves through the gap between the second pipe and the second pipe. The fuel gas generation device according to claim 7 or 8, characterized in that
The fuel gas generation device according to claim 7 or 8, wherein the heating device inserts a third pipe through which the second fluid having a temperature higher than the temperature of the slurry body moves into the second pipe. .
A third pipe through which the first pipe is inserted so that the first fluid moves through a gap between the first pipe and the first pipe;
The heating device includes a fourth pipe coupled to the third pipe so that the first fluid having a temperature higher than the temperature of the slurry body moves through the gap between the second pipe and the second pipe. The fuel gas generation device according to claim 8.
A third pipe inserted through the first pipe so that the first fluid moves through a gap between the first pipe and the first pipe;
The fuel gas generation device according to claim 8, wherein the heating device couples a fourth pipe through which the first fluid having a temperature higher than a temperature of the slurry body moves with the third pipe.
The heat exchange device according to any one of claims 1 to 6, wherein the second pipe is coupled in a state bent from the first pipe on the downstream side of the first pipe.
The fuel gas generation device according to any one of claims 7 to 12, wherein the second pipe is coupled in a state bent from the first pipe on the downstream side of the first pipe.
The heat exchange device according to claim 13, wherein the heating device includes a heater that applies heat to a bent portion in the second pipe.
The fuel gas generation device according to claim 14, wherein the heating device includes a heater that applies heat to a bent portion of the second pipe.
The heat exchange device according to claim 15, wherein the heating device includes a bent portion in the second pipe and a heater that applies heat to the downstream side.
The fuel gas generation device according to claim 16, wherein the heating device includes a bent portion in the second pipe and a heater that applies heat to a downstream side.