JP7514103B2 - Water boiler equipment - Google Patents

Description

The present invention relates to a water-based boiler system that is installed on a ship and used on water.

In recent years, combined cycle power generation systems that include boiler equipment for recycling exhaust heat have been used as highly efficient power generation systems. A combined cycle power generation system is configured, for example, by combining a power generation device driven by a gas turbine engine with a power generation device driven by a steam turbine, and since the heat of the exhaust gas discharged from the gas turbine engine is recovered in the boiler and used to drive the steam turbine, it is possible to generate electricity with high efficiency (for example, see Patent Document 1).

However, in areas where commercial power generation and transmission networks are not yet established, and in island regions where it is difficult to secure land for power generation facilities due to geographical conditions, there is a demand for power supply from power plant ships (floating power plants) that can move on water such as rivers and oceans. In order to meet this demand, it is necessary to install and operate boiler equipment on the hull.

JP 2020-020319 A

However, unlike on land, there is constant rocking on water, so to ensure stable operation of boiler equipment, through which a gas-liquid mixture flows, a strong support structure and connecting structure are required. Furthermore, to install a large-scale system such as a combined cycle power generation system on a ship, it is necessary to place the boiler equipment, along with other large devices such as gas turbine engines and steam turbines, in a limited space while taking into consideration the unique structure of the ship.

The object of the present invention is to solve the above problems by providing a simple and compact structure for effectively supporting a water-based boiler facility.

In order to achieve the above object, the water boiler facility according to the present invention comprises:
The hull and
A plurality of boilers installed in the hull,
Each boiler has an elongated shape in a plan view, and includes a boiler body that generates steam, and a boiler support structure that supports the boiler body, and the boiler support structure includes a plurality of column members extending in a height direction of the boiler, and beam members that connect adjacent column members,
A plurality of boilers including a first boiler and a second boiler arranged laterally facing a width direction perpendicular to a longitudinal direction and a height direction of the first boiler;
Equipped with
The boiler support structure of the first boiler and the boiler support structure of the second boiler are connected to each other.

With this configuration, at least one of the multiple boilers installed on a ship's hull, which is constantly rocking, is supported in the width direction, which is structurally weak, by using the other boilers, making it possible to efficiently support the boiler in a compact and simple structure on a narrow ship's hull.

As described above, according to the present invention, in a water-based boiler facility, it is possible to effectively support the boiler facility with a simple and compact structure.

1 is a front view showing a schematic configuration of a water boiler facility according to an embodiment of the present invention. FIG. FIG. 2 is a side view showing a schematic configuration of the water boiler facility of FIG. 1 . FIG. 2 is a plan view showing a schematic configuration of the water boiler facility of FIG. 1 . FIG. 3 is an enlarged side view showing a portion of the water boiler facility of FIG. 2. FIG. 5 is a cross-sectional view taken along line V-V in FIG. 4 . FIG. 11 is a plan view showing a schematic configuration of a water boiler facility according to another embodiment of the present invention. FIG. 7 is a plan view showing a modified example of the water boiler facility of FIG. 6 .

Embodiments of the present invention will now be described with reference to the drawings. FIG. 1 shows a surface boiler facility 1 according to one embodiment of the present invention. This surface boiler facility 1 comprises a hull 3 that floats on water, and a boiler facility B installed on the hull 3. The boiler facility B includes multiple boilers 5 (two in this example) and a connecting member 7 that connects the multiple boilers 5 together.

In this embodiment, a combined cycle power generation system is mounted on the hull 3. Each boiler 5 is a component of the combined cycle power generation system. The combined cycle power generation system according to this embodiment includes a gas turbine power generation unit 9, the boiler 5 as a waste heat boiler, and a steam turbine power generation unit (not shown) in the hull 3. In the example shown in the figure, the hull 3 is a barge type with a generally rectangular parallelepiped shape, and is configured as a non-self-propelled hull without a propulsion device. In this specification, the term "hull" includes any structure configured to float on water, such as various ships, barges, and floating bodies.

As shown in FIG. 2, the gas turbine power generation system 9 includes a gas turbine engine (hereinafter simply referred to as "gas turbine") 11, a generator 13 connected to the gas turbine 11 via a turbine rotor, and a gas turbine casing 15 that covers the gas turbine 11 and the generator 13. The gas turbine 11 rotates and drives a turbine 17 by burning a mixture of compressed air and fuel, and the generator 13 is driven by the rotational power obtained thereby. The gas turbine 11 includes an exhaust duct 19 that discharges exhaust gas G1 after driving the turbine 17. In this embodiment, the exhaust duct 19 is configured to discharge the exhaust gas G1 upward.

The exhaust gas G1 discharged from the exhaust duct 19 of the gas turbine 11 is supplied to the boiler 5. The boiler 5 generates steam using the exhaust gas G1 as a heat source. The steam generated in the boiler 5 is sent to the steam turbine of the steam turbine power generation device to drive the steam turbine.

As shown in FIG. 1, the combined cycle power generation system includes multiple gas turbine power generation units 9 (two in this example). In this embodiment, one boiler 5 is provided for each gas turbine power generation unit 9. Therefore, as described above, the surface boiler facility 1 includes multiple boilers 5 (two in this example).

As shown in FIG. 3, each boiler 5 has an elongated shape in a plan view. These two boilers 5 are installed side by side in the longitudinal direction (hereinafter referred to as the "boiler longitudinal direction") L1 of each boiler 5 and in the width direction (hereinafter referred to as the "boiler width direction") W1 perpendicular to the height direction H, so that the boiler longitudinal direction L1 of each boiler 5 is parallel to each other. In other words, each boiler 5 is disposed to the side of the other boiler 5 (in the direction facing the boiler width direction W1). In this example, each boiler 5 is disposed so that the boiler longitudinal direction L1 of each boiler 5 is parallel to the longitudinal direction (hereinafter referred to as the "hull longitudinal direction") L2 of the hull 3.

More specifically, in the illustrated example, the two gas turbine generators 9 are arranged so that their respective axes C are parallel to the hull longitudinal direction L2, and are arranged side by side in the width direction W2 of the hull 3. As will be described in detail later, each boiler 5 is arranged above the corresponding gas turbine generator 9 so that the longitudinal direction L1 of the boiler 5 is parallel to the axial direction C of the gas turbine generator 9. Note that the arrangement direction of each boiler 5 relative to the hull 3 and gas turbine generator 9 is not limited to this example.

As shown in FIG. 4, the boiler 5 according to this embodiment specifically includes a boiler body 21 configured as a heat exchanger that generates steam using exhaust gas G1 as a heat source, and a boiler support structure 23 that supports the boiler body 21. The boiler body 21 includes an evaporation tube 25 that evaporates water, and a drum 27 shown in FIG. 1 that is arranged above the evaporation tube 25 and separates the steam generated in the evaporation tube 25 from the water. In this example, each boiler 5 includes two drums 27, a high-pressure drum 27A and a low-pressure drum 27B. Although not shown, the boiler body 21 may include various known heat exchangers such as a superheater and a coal economizer in addition to the evaporation tube 25 and drum 27 described here. The specific configuration of the boiler 5 is not limited to this example, and may be, for example, a once-through boiler without a drum.

Returning to FIG. 4, the evaporator tubes 25 are covered by a boiler wall 29 that forms a passage (flue) for exhaust gas G1 passing through the boiler 5. An exhaust stack 31 that opens upward is provided at the top of the boiler wall 29. In this example, the exhaust stack 31 is provided at approximately the center of the boiler wall 29 in the boiler longitudinal direction L1. Exhaust gas G2 that has passed through the boiler main body 21 (inside the boiler wall 29) is discharged to the outside from the exhaust stack 31. The boiler support structure 23 will be described later.

The boiler wall 29 has an inlet 29a, a body 29b, and an outlet 29c, in that order from the bottom. The inlet 29a introduces the exhaust gas G1 from the exhaust duct 19 of the gas turbine 11. The body 29b has an evaporation tube 25 arranged therein, and brings the evaporation tube 25 into contact with the exhaust gas G1. The outlet 29c outlets the exhaust gas G1 to the exhaust tube 31 connected to its upper part. The inlet 29a is formed in a substantially trapezoidal shape that gradually widens from the bottom to the top in a side view. The body 29b is formed in a substantially rectangular shape that extends upward from the upper end of the inlet 29a in a side view. The outlet 29c is formed in a substantially trapezoidal shape that gradually narrows from the upper end of the body 29b in a side view. Also, as shown in FIG. 1, in this example, the boiler wall 29 has a shape in which the dimension in the height direction H is larger than the dimension in the boiler width direction W1. However, the shape of the boiler wall 29 (boiler body 21) is not limited to this example.

The support structure and connection structure for multiple boilers 5 are described in detail below.

As shown in FIG. 1, the hull 3 has an upper deck 33. A closed space is formed below the upper deck 33, i.e., between the upper deck 33 and the bottom of the ship, and an open space is formed above the upper deck 33. In this embodiment, the boiler 5 and the gas turbine generator 9 are installed above the upper deck 33. Specifically, the gas turbine generator 9 is installed on the upper deck 33, and the boiler 5 is installed above the gas turbine generator 9.

The installation position of the boiler 5 relative to the hull 3 and the gas turbine power generation unit 9 is not limited to this example. For example, the boiler 5 may be installed on the upper deck 33, similar to the gas turbine power generation unit 9, or may be installed below the upper deck 33.

In the illustrated example, a stand 35 for the boiler 5 is installed on the upper deck 33, and the boiler 5 is installed on this stand 35. The height and width of the stand 35 are set to be larger than the height and width of each gas turbine generator 9, and the stand 35 is positioned so as to straddle each gas turbine generator 9 in the width direction. In this example, the stand 35 is made of steel.

Specifically, in this embodiment, each of the racks 35 (two racks 35 in this example) supporting each of the boilers 5 is formed as an integrated common rack 37. More specifically, in this example, the common rack 37 has, as shown in FIG. 5, four rack side column members 39A, two on each side of two adjacent gas turbine power generation units 9, two rack intermediate column members 39B arranged between these two gas turbines 11, and a rack frame member 41 connected to the upper part of these six rack column members 39. The rack frame member 41 is formed of seven beams, including three beams connecting the two column members 39 on each side and in the middle position, and four beams connecting adjacent column members in the boiler width direction W1. Each boiler 5 is installed on two beams extending in the boiler width direction W1 of the rack frame member 41. In FIG. 5, the internal space of the boiler body 21 of the boiler 5 is shown hatched. In this example, the shared stand 37 does not have any beams other than the seven beams that form the stand frame member 41.

In this way, by integrating multiple racks 35 corresponding to multiple boilers 5 into a common rack 37, the total number of components and space required to form all racks 35 can be reduced compared to when a rack 35 corresponding to each boiler 5 is provided separately. However, multiple racks 35 may also be formed separately.

The boiler support structure 23 includes a plurality of column members 45 extending in the height direction H of the boiler 5 and a beam member 47 connecting adjacent column members 45. More specifically, the column members 45 of each boiler support structure 23 include two front column members 45A arranged on both sides of the boiler body 21 at one end (left end in FIG. 5) in the boiler longitudinal direction L1, and two rear column members 45B arranged on both sides of the boiler body 21 at the other end (right end in FIG. 5). These front column members 45A and rear column members 45B extend from the installation surface of the boiler 5 (the upper surface of the frame member 41, which is the installation surface on the frame 35 in this example) to a position that corresponds approximately to the boundary between the body portion 29b and the outlet portion 29c of the boiler wall body 29.

In the illustrated example, the column members 45 further include a first intermediate column member 45C1 and a second intermediate column member 45C2 arranged at position L1 in the boiler longitudinal direction, sandwiching the exhaust stack 31 in a side view.

As shown in FIG. 5, the beam members 47 of each boiler support structure 23 include a front beam member 47A that connects the two front pillar members 45A in the boiler width direction W1, and a rear beam member 47B that connects the two rear pillar members 45B in the boiler width direction W1. Specifically, in the illustrated example, the front beam member 47A and the rear beam member 47B are each provided at approximately the center of the height direction H of the body portion 29b of the boiler wall body 29, as shown in FIG. 4. In the illustrated example, the front beam member 47A and the rear beam member 47B are also provided at multiple height positions other than approximately the center of the height direction H of the body portion 29b of the boiler wall body 29.

In the illustrated example, the beam members 47 further include multiple side beam members 47C that connect the front column member 45A and the rear column member 45B on both sides of the boiler body 21 in the height direction H. In this example, each side beam member 47C is provided at the same height position as the corresponding front beam member 47A and rear beam member 47B.

The positions and number of the column members 45 and beam members 47 that make up the boiler support structure 23 are not limited to this example and may be selected as desired.

The connecting members 7 are formed integrally with the beam members 47 of the boiler support structure 23, and connect adjacent boilers 5 (two in this example) in the boiler width direction W1. In the illustrated example, the connecting members 7 include a front connecting member 7A that is integrally formed by connecting to each front beam member 47A of the two boilers 5, and a rear connecting member 7B that is integrally formed with each rear beam member 47B.

More specifically, as shown in the figure, the front and rear connecting members 7 and the beam members 47 that are integrally formed by being connected to these connecting members 7 are formed as a single rod-shaped member 49 that extends in a straight line.

However, the manner in which the connecting member 7 and the beam member 47 are integrally formed is not limited to this example. For example, as shown by the dashed line in the figure, the connecting member 7 may be provided at a midpoint between both ends of the boiler 5 in the longitudinal direction L1, and each side beam member 47C provided on the opposing sides of two adjacent boilers 5 may be integrally formed with the connecting member 7. In the illustrated example, multiple connecting members 7 (two in this example) are arranged at equal intervals in the boiler longitudinal direction L1, but only one connecting member 7 may be provided at the center of the both side beam members 47 in the boiler longitudinal direction L1. This integrally formed member of the side beam member 47 and the connecting member 7 may be provided in place of the integrally formed members at both ends described above, or may be provided in addition to them.

As shown in FIG. 1, the drum 27 of each boiler 5 is installed on a drum support base 51 connected to the two boilers 5 connected to each other by a connecting member 7. Specifically, as shown in FIG. 1, the drum support base 51 is provided between the boiler bodies 21 of the two boilers 5. As shown in FIG. 4, the drum support base 51 is a flat plate-shaped member provided on the front column member 45A and the rear column member 45B. In this example, the drum support base 51 is provided at a position that corresponds approximately to the boundary between the body portion 29b and the outlet portion 29c of the boiler wall body 29. Furthermore, the drum support base 51 also serves as the beam member 47 that connects the multiple column members 45 and the connecting member 7 formed integrally therewith.

Returning to FIG. 1, in this embodiment, drum support columns 53 that support the drum support base 51 are provided directly below each drum 27 on the drum support base 51. In this example, each boiler 5 has two drums 27, a high-pressure drum 27A and a low-pressure drum 27B. Therefore, a total of four drums 27 are installed on the drum support base 51, and drum support columns 53 are provided directly below each drum 27. Each drum support column 53 extends from the installation surface of the boiler 5 (in this example, the upper surface of the frame member 41, which is the installation surface on the frame 35) to the lower surface of the drum support base 51.

By installing the drum 27 of each boiler 5 on the drum support stand 51 configured in this manner, the boilers 5 can be connected to support each other at the top between adjacent boiler bodies 21, while reducing the dimension in the height direction H of the entire boiler equipment B. Therefore, the boilers 5 and the drums 27 equipped to the boilers 5 can be supported with a simple and compact structure.

The position where the boiler support base 51 is provided is not limited to the above example, so long as it is possible to install the drum 27 located above the evaporation tube 25. For example, the drum support base 51 may be provided above the boiler body 21. The drum support column 53 may also serve as a downcomer pipe. When the drum support column 53 also serves as a downcomer pipe, for example, the upper end of the drum support column 53 may pass through the drum support base 51 and be directly connected to the drum 27, and the lower end of the drum support column 53 may be connected to a feedwater pump installed on the boiler installation surface. However, the structure for supporting the drum 27 is not limited to these examples.

As shown in FIG. 4, in this embodiment, in each boiler 5, the evaporator tubes 25 extend along the boiler longitudinal direction L1 and along the hull longitudinal direction L2, and are inclined from one side of the boiler longitudinal direction L1 to the other. The reason why the evaporator tubes 25 extend along the boiler longitudinal direction L1 is to reduce costs by minimizing the number of joints of the evaporator tubes 25. The reason why the evaporator tubes 25 are inclined is to efficiently separate the gas-liquid mixed phase (saturated water) or to naturally circulate the gas-liquid mixed phase within the large circulation loop formed by the drum 27 and the evaporator tubes 25.

Figure 6 shows a water boiler facility 1 according to another embodiment of the present invention. The water boiler facility 1 according to this embodiment differs from the embodiment shown in Figures 1 to 5 in the relative arrangement of two adjacent boilers 5. That is, in this embodiment, one boiler 5 (hereinafter referred to as the "first boiler 5A") is arranged to the side of the other boiler 5 (hereinafter referred to as the "second boiler 5B"), with its longitudinal direction L1B being approximately perpendicular to the boiler longitudinal direction L1A of the first boiler 5A. Below, this embodiment will be mainly described in this respect, and the description of the configuration common to the embodiment shown in Figures 1 to 5 will be omitted.

More specifically, the second boiler 5B is disposed to the side of the first boiler 5A, at approximately the center of the boiler longitudinal direction L1A of the first boiler 5A. In other words, these boilers 5A and 5B are disposed in a T-shape in a plan view. In this case, for example, a drum support stand 51 can be disposed at each of the two corners formed by the first boiler 5A and the second boiler 5B.

The position of the second boiler 5B relative to the boiler longitudinal direction L1A of the first boiler 5A is not limited to a central position. For example, as shown in FIG. 7 as a modified example of this embodiment, the second boiler 5B may be disposed at an end position of the first boiler 5A in the boiler longitudinal direction L1A, to the side of the first boiler 5A. In other words, these boilers 5A and 5B may be disposed in an L-shape in a plan view. In this case, for example, a drum support stand 15 can be disposed at one corner formed by the first boiler 5A and the second boiler 5B.

In this embodiment, the first boiler 5A is arranged so that its boiler longitudinal direction L1A is parallel to the hull longitudinal direction L2.

According to the above-described floating boiler facility B according to this embodiment, at least one of the multiple boilers 5 installed on the ship hull 3, which is constantly rocking, is supported in the width direction, which is structurally weak, by using the other boilers 5, making it possible to efficiently support the boiler 5 on the narrow ship hull 3 with a compact and simple structure.

In particular, as in the embodiment shown in Figures 1 to 5, when two boilers 5 are arranged side by side in the width direction with their respective longitudinal directions parallel to each other, and these two boilers 5 are connected in the width direction by a connecting member formed integrally with the beam members of both boilers, the boilers 5 support each other in the width direction, which is structurally weak, and therefore a compact, simple, and stronger support structure can be achieved on the narrow hull 3.

As shown in the embodiment of Figures 6 and 7, the two boilers 5A, 5B may be arranged so that their respective longitudinal directions L1A, L1B are perpendicular to each other. This configuration makes it easy to adjust the arrangement of the boiler equipment B to match the arrangement of other devices and equipment installed in the hull 3.

1 to 5, as described above, the plurality of column members 45 of each boiler support structure 23 includes two front column members 45A arranged on both sides at one end in the boiler longitudinal direction and two rear column members 45B arranged on both sides at the other end, the beam member 47 of each boiler support structure 23 includes a front beam member 47A connecting the two front column members 45A and a rear beam member 47B connecting the two rear column members 45B45, and the connecting member 7 includes a front connecting member 7 formed integrally with the front beam member 47A of the plurality of boilers 5 and a rear connecting member 7 formed integrally with the rear beam member 47B. With this configuration, the boilers 5 can be effectively supported while reducing the number of connecting members 7 by connecting the boilers 5 to each other at both ends in the boiler longitudinal direction L1 while effectively supporting each boiler 5 by the boiler support structure 23. Furthermore, during the installation of boiler equipment B, the beam members 47 and the connecting members 7 can be attached at the same height, making the installation process more efficient and reducing installation costs.

In the embodiment of Figures 1 to 5, the connecting member 7 and each beam member 47 formed integrally with the connecting member 7 are formed as a single rod-shaped member 49 extending in a straight line, so that the boiler 5 can be supported with a more compact and simple structure. Furthermore, the standardization of components further improves the efficiency of the installation work of the boiler equipment B.

In each of the above embodiments, the drum 27 of the boiler body 21 is installed on a drum support stand 51 connected to two boilers 5 that are connected to each other, and a drum support column 53 that supports the drum support stand 51 is provided directly below the drum 27 on the drum support stand 51. This configuration makes it possible to effectively use the limited space above the adjacent boilers 5 while simultaneously connecting the boilers 5 and supporting the drum 27.

In this embodiment, each boiler 5 is arranged so that the longitudinal direction L1 of each boiler 5 is parallel to the hull longitudinal direction L2, i.e., the direction in which the angle of rocking is smaller than the width direction W2 of the hull 3. Therefore, the boiler 5 can be supported with a compact and simple structure while suppressing the effect of rocking of the hull 3 on the boiler 5. However, the installation direction of each boiler 5 relative to the hull 3 is not limited to this.

In this embodiment, the boiler body 21 of at least one of the multiple boilers 5 is equipped with an evaporation tube 25 that evaporates water, and the evaporation tube 25 extends along the longitudinal direction L1 of the boiler 5 and is inclined from one side to the other of the longitudinal direction L1 of the boiler 5. According to this configuration, the evaporation tube 25 extends along the longitudinal direction of the hull 3, which is less affected by the rocking of the hull 3, and is inclined in this direction, so that the effect of the rocking of the hull 3 on the gas-liquid separation action of the evaporation tube 25 can be suppressed.

In this embodiment, multiple boilers 5 are arranged above the upper deck 33 of the hull 3. This configuration allows the hull 3 to sway significantly and allows efficient support on the upper deck 33, which has no surrounding ship walls, with a compact and simple structure.

In this embodiment, as described above, since the boiler 5 is disposed above the gas turbine power generation device 9 via the frame 35, the boiler equipment B swings significantly due to the rocking of the hull 3 on the water, and therefore it is particularly necessary to firmly support each boiler 5 in the width direction W1. Therefore, in this case, the adjacent boilers 5 are connected to each other by the connecting member 7, and the boilers 5 support each other, which is advantageous in that the boilers 5 can be supported with a compact and simple structure. The boiler 5 may be provided above another device installed on the hull 3, such as a steam turbine power generation device, instead of the gas turbine power generation device 9. In addition, as long as each boiler 5 of the boiler equipment B is installed on the hull 3 (for example, even if it is installed directly on the upper deck 33 or installed on the bottom of the ship), it will always be affected by the rocking of the hull 3, so even if the boiler equipment B is not disposed above the gas turbine power generation device 9, the advantage of supporting the boilers 5 by connecting multiple boilers 5 with the connecting member 7 can be obtained.

In addition, in this embodiment, an example has been shown in which the boiler equipment B is one component of a combined cycle power generation system, but the configuration of the combined cycle power generation system is not limited to the above example. Furthermore, the system including the boiler equipment B installed in the hull 3 is not limited to a combined cycle power generation system.

As described above, a preferred embodiment of the present invention has been described with reference to the drawings, but various additions, modifications, and deletions are possible without departing from the spirit of the present invention. Therefore, such additions, modifications, and deletions are also included within the scope of the present invention.

Reference Signs List 1: Floating boiler facility 3: Ship hull 5: Boiler 7: Connection member 21: Boiler body 23: Boiler support structure 27: Drum 45: Column member 47: Beam member 49: Rod-shaped member 51: Drum support base 53: Drum support column L1: Boiler longitudinal direction H: Boiler height direction W1: Boiler width direction

Claims (7)

The hull and
A plurality of boilers installed in the hull,
Each boiler has an elongated shape in a plan view, and includes a boiler body that generates steam, and a boiler support structure that supports the boiler body, and the boiler support structure includes a plurality of column members extending in a height direction of the boiler, and beam members that connect adjacent column members,
A plurality of boilers including a first boiler and a second boiler arranged laterally facing a width direction perpendicular to a longitudinal direction and a height direction of the first boiler;
Equipped with
The boiler support structure of the first boiler and the boiler support structure of the second boiler are connected to each other;
The boiler body of at least one of the plurality of boilers includes an evaporation tube for evaporating water, the evaporation tube extending along a longitudinal direction of the boiler and inclined from one side to the other side in the longitudinal direction of the boiler.
Water boiler equipment. The water boiler facility according to claim 1,
The first boiler and the second boiler are arranged side by side in a width direction such that their longitudinal directions are parallel to each other,
A connecting member that connects the first boiler and the second boiler in the width direction, the connecting member being integrally formed with the beam members of both boilers.
Water boiler equipment. The water boiler facility according to claim 2,
The plurality of column members of each boiler support structure include two front column members arranged on both sides at one end of the longitudinal direction of the boiler body and two rear column members arranged on both sides at the other end,
The beam members of each boiler support structure include a front beam member connecting the two front column members and a rear beam member connecting the two rear column members,
The connecting member includes a front connecting member integrally formed with the front beam member of the plurality of boilers and a rear connecting member integrally formed with the rear beam member.
Water boiler equipment. The above-mentioned water boiler facility according to claim 2 or 3, wherein the connecting member and each beam member integrally formed with the connecting member are formed as a single rod-shaped member extending in a straight line. The water boiler facility according to any one of claims 1 to 4,
The boiler body of at least one of the plurality of boilers includes an evaporation tube that evaporates water, and a drum that is disposed above the evaporation tube and separates steam generated in the evaporation tube from water,
the drum is mounted on a drum support connected to the first boiler and the second boiler;
A drum support column that supports the drum support base relative to the hull is provided directly below the drum on the drum support base.
Water boiler equipment. A surface boiler facility according to any one of claims 1 to 5, wherein the first boiler is arranged so that its longitudinal direction is parallel to the longitudinal direction of the hull. 7. The water boiler plant according to claim 1, wherein the hull has an upper deck, and the plurality of boilers are arranged above the upper deck.

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