JP6057751B2 - Marine reheat boiler expansion joints, marine reheat boilers, and ships - Google Patents

Description

  The present invention relates to a marine reheat boiler mounted on a marine vessel and an assembling method thereof.

  As a marine reheat boiler mounted on a marine vessel, for example, a reheat boiler 5 disclosed in Patent Document 1 is known.

JP 2012-167858 A

A marine reheat boiler 5 mounted on a marine vessel is configured with a main body 30 including a main furnace (main boiler) 27 and a reheat furnace 29, a reheater 61, and a duct 72 as main elements. It is.
And as shown in FIG. 8, the boiler main body 30 is a boiler main body via the plurality (for example, four) (first) fixed leg 73 provided on the deck D1 in which the boiler main body 30 is installed. The reheater 61, which is fixed on the deck D1 on which the boiler 30 is installed and the duct 72 is attached in advance, is provided on the deck D2 directly above the deck D1 on which the boiler body 30 is installed (the upper deck) D2. The reheater 61 is fixed on the deck D <b> 2 where the reheater 61 is installed via the plurality (for example, four) (second) fixing legs 74.
Further, the exhaust gas outlet provided at the upper end of the reheating furnace 29 and the exhaust gas inlet provided at the lower end of the reheater 61 are connected via a duct 72.

Here, at the time of construction of the ship, a block body (hull) including the deck D1 in which the boiler body 30 is installed and a block body (hull) including the deck D2 in which the reheater 61 is installed are separate blocks. It is assembled as a body, and then it is transported to the stern and dock and assembled into a ship shape.
The (first) fixed leg 73 is installed on the deck D1 on which the boiler body 30 is installed when the block body including the deck D1 on which the boiler body 30 is installed is assembled. The legs 74 are installed on the deck D2 on which the reheater 61 is installed when assembling the block body including the deck D2 on which the reheater 61 is installed.

Further, the block body including the deck D1 where the boiler body 30 is installed and the block body including the deck D2 where the reheater 61 is installed, which are assembled as separate block bodies, are combined (first ) When the boiler body 30 is fixed to the fixed leg 73 and the reheater 61 is fixed to the (second) fixed leg 74, the installation position on the decks D1 and D2 of the ship and the manufacturing accuracy of each block body, etc. The exhaust gas outlet provided at the upper end of the reheating furnace 29 is not usually located immediately below the exhaust gas inlet provided at the lower end of the reheater 61, and the bow direction, stern direction, port direction, starboard direction The deviation is several mm to several tens mm.
Therefore, when assembling a conventional marine boiler, prepare a duct that can absorb a deviation of several millimeters to several tens of millimeters in the bow direction, stern direction, port direction, starboard direction, and has a substantially rectangular parallelepiped appearance. The duct is processed on-site in accordance with the deviation in the bow direction, stern direction, port direction, and starboard direction, and the exhaust gas outlet provided at the upper end of the reheating furnace 29 and the lower end of the reheater 61 are provided. The exhaust gas inlet was connected via a duct.

However, the duct is processed on-site in accordance with the deviation in the bow direction, stern direction, port direction, starboard direction, and provided at the exhaust gas outlet provided at the upper end of the reheating furnace 29 and at the lower end of the reheater 61. The conventional method of connecting the exhaust gas inlet through the duct is possible with the conventional marine boiler 5 in which the heat insulating material is attached to the outside of the duct.
However, as the exhaust gas temperature of the marine reheat boiler increases (450 ° C. or higher), a heat insulating material (heat insulating material) having a thickness of about 300 mm is attached to the inner surface of the duct, and the inner surface of the heat insulating material has a thickness of 3 mm. A stainless steel plate of about a degree can be attached. For this reason, when ducts are processed on-site in accordance with the deviation in the bow direction, stern direction, port direction, and starboard direction, there is a problem that the construction time becomes longer.

The present invention has been made to solve the above-described problem, and can be used to expand a reheating boiler for a marine vessel that can simplify an assembly process at the time of outfitting of a marine vessel and can shorten a mounting time on the marine vessel. It is an object of the present invention to provide a joint, a marine reheat boiler equipped with the joint, and a marine vessel .

In order to solve the above problems, the present invention employs the following means.
An expansion joint of a marine reheat boiler according to the present invention includes a boiler body including a main furnace and a reheat furnace, and a reheater, and an upper end of the reheat furnace that is an exhaust gas outlet, and an exhaust gas inlet a said duct provided at a lower end of the reheater, expansion joints marine reheat boiler is connected via the expansion joint disposed between said between said duct reheat furnace is, outside A casing, an inner casing, a heat insulating material disposed between the outer casing and the inner casing, and a height dimension reducing mechanism for reducing a dimension in a height direction, the inner casing including the height A first member disposed on the upper side in the vertical direction and extending along the height direction; and disposed on a lower side in the height direction, the upper end being located above the lower end relative to the lower end. Includes a second member that is tilted so as to be positioned ring side, and the and the upper end of the second member is positioned outward from the lower end of said first member, said boiler body on the ship deck When the reheater with the duct attached in advance is installed on the deck immediately above the deck on which the boiler body is installed, the upper end of the reheating furnace and the duct direction , and aft, port direction, wherein the shape der Rukoto based on displacement in the starboard direction.

According to the expansion joint of the marine reheat boiler according to the present invention, it is not necessary to process the duct on site in accordance with the deviation in the bow direction, the stern direction, the port direction, and the starboard direction in the assembling process when the ship is equipped. Based on the deviation in the bow direction, stern direction, port direction, starboard direction, an expansion joint manufactured separately at the factory etc. is provided at the exhaust gas outlet provided at the upper end of the reheating furnace and at the lower end of the duct It only has to be inserted into the gap formed between the exhaust gas inlet and the exhaust gas inlet.
Thereby, simplification of the assembly process at the time of outfitting of a ship can be aimed at, and the loading time to a ship can be shortened.

Expansion joints of the marine reheat boiler, that have a height reduction mechanism for reduction of the dimension in the height direction.

According to the expansion joint of such a marine reheat boiler, the expansion joint is provided at the upper end of the reheating furnace in a state in which the dimension in the height direction of the expansion joint is reduced (decreased) by, for example, 30 mm to 50 mm. The exhaust gas is inserted into a gap formed between the exhaust gas outlet and the exhaust gas inlet provided at the lower end of the duct. That is, the expansion joint is inserted in a state where a gap is formed between the lower end of the expansion joint and the upper end of the reheating furnace and / or between the upper end of the expansion joint and the lower end of the duct.
Thereby, the further simplification of the assembly process at the time of outfitting of a ship can be aimed at, and the mounting time to a ship can further be shortened.

Expansion joints of the marine reheat boiler, inner surface that is covered with a heat insulating material.

  According to such an expansion joint of a marine reheat boiler, the exhaust gas temperature can be increased (450 ° C. or higher).

  The marine reheat boiler according to the present invention includes the expansion joint of any of the marine reheat boilers described above.

According to the marine reheat boiler according to the present invention, it is not necessary to process the duct in the field in accordance with the deviation in the bow direction, stern direction, port direction, starboard direction in the assembly process at the time of ship outfitting, and the bow direction Based on the deviation in the stern direction, port direction, starboard direction, an expansion joint manufactured separately at the factory, etc., and an exhaust gas outlet provided at the upper end of the reheating furnace and an exhaust gas provided at the lower end of the duct It only needs to be inserted into the gap formed between the entrance.
Thereby, simplification of the assembly process at the time of outfitting of a ship can be aimed at, and the loading time to a ship can be shortened.

  The ship which concerns on this invention has comprised the said marine reheat boiler.

According to the ship according to the present invention, it is not necessary to process the duct in the field in accordance with the deviation in the bow direction, the stern direction, the port direction, and the starboard direction in the assembly process at the time of the outfitting of the ship, the bow direction, the stern direction Based on the displacement in the port and starboard directions, an expansion joint manufactured separately at a factory or the like is connected to an exhaust gas outlet provided at the upper end of the reheating furnace and an exhaust gas inlet provided at the lower end of the duct. It only needs to be inserted into the gap formed between them.
Thereby, simplification of the assembly process at the time of outfitting of a ship can be aimed at, and the loading time to a ship can be shortened.

An assembly method of a marine reheat boiler according to a reference example of the present invention includes a step of installing a boiler body provided with a main furnace and a reheat furnace on a ship deck, and a deck directly above the deck on which the boiler body is installed. And a reheat furnace serving as an exhaust gas outlet in a method for assembling a marine reheat boiler comprising a step of installing a reheater on a deck, and a duct attached to a lower end of the reheater serving as an exhaust gas inlet. Measure the deviation in the bow direction, stern direction, port direction, starboard direction with respect to the upper end of the gas flow, and manufacture the expansion joint based on the deviation, and the lower end of the reheater serving as the exhaust gas inlet Connecting the reheat furnace and the duct by inserting the expansion joint between the attached duct and the upper end of the reheat furnace to be an exhaust gas outlet.

According to the assembling method of the marine reheat boiler according to the reference example of the present invention , in the assembling process at the time of outfitting of the ship, the duct is processed on-site according to the deviation in the bow direction, the stern direction, the port direction, and the starboard direction. Eliminates the need for expansion joints manufactured separately at factories, etc., based on deviations in the bow, stern, port, and starboard directions, and the exhaust gas outlet at the top of the reheating furnace and the bottom of the duct It only needs to be inserted into the gap formed between the exhaust gas inlet provided in the.
Thereby, simplification of the assembly process at the time of outfitting of a ship can be aimed at, and the loading time to a ship can be shortened.

In the assembly method of the marine reheat boiler, while being reduction of the dimension in the height direction of the expansion joint, the upper end of the reheat furnace comprising an exhaust gas outlet, and a lower end of the duct comprising an exhaust gas inlet More preferably, the expansion joint is inserted into a gap formed between the two.

According to such an assembly method for a marine reheat boiler, the expansion joint is provided at the upper end of the reheating furnace in a state in which the dimension in the height direction of the expansion joint is reduced (decreased) by, for example, 30 mm to 50 mm. The exhaust gas is inserted into a gap formed between the exhaust gas outlet and the exhaust gas inlet provided at the lower end of the duct. That is, the expansion joint is inserted in a state where a gap is formed between the lower end of the expansion joint and the upper end of the reheating furnace and / or between the upper end of the expansion joint and the lower end of the duct.
Thereby, the further simplification of the assembly process at the time of outfitting of a ship can be aimed at, and the mounting time to a ship can further be shortened.

According to the expansion joint of a marine reheat boiler and the marine reheat boiler and the ship having the same according to the present invention, it is possible to simplify the assembly process at the time of the outfitting of the ship, and to shorten the mounting time on the ship. There is an effect that can be.

1 is a schematic configuration diagram of a marine propulsion plant including a marine reheat boiler according to an embodiment of the present invention. It is a perspective view which shows the principal part of the marine reheat boiler which concerns on one Embodiment of this invention. It is a longitudinal cross-sectional view of the expansion joint which concerns on one Embodiment of this invention. It is a perspective view which notches and shows a part of expansion joint which concerns on one Embodiment of this invention. It is a figure for demonstrating the assembly method of the marine reheat boiler which concerns on one Embodiment of this invention. It is a figure for demonstrating the assembly method of the marine reheat boiler which concerns on one Embodiment of this invention. It is a figure for demonstrating the assembly method of the marine reheat boiler which concerns on one Embodiment of this invention. It is a figure showing the state where a ship reheat boiler was carried in a ship.

Hereinafter, a marine reheat boiler and an assembling method thereof according to an embodiment of the present invention will be described with reference to FIGS.
First, a schematic configuration of a marine propulsion plant including a marine reheat boiler according to the present embodiment will be described with reference to FIG.
As shown in FIG. 1, the marine propulsion plant 1 includes a propulsion turbine 3, a marine reheat boiler 5, and a propeller 7 as a propulsion device.

The propulsion turbine 3 includes a high-pressure turbine 9, an intermediate-pressure turbine 11, a low-pressure turbine 13, and a reverse turbine 15.
The high-pressure turbine 9 and the intermediate-pressure turbine 11 are connected via a single rotating shaft 17 and are accommodated in the interior of the casing casing 19. The casing casing 19 is manufactured, for example, in a state of being divided into two vertically, and after the high-pressure turbine 9 and the intermediate-pressure turbine 11 are accommodated in the lower half, the upper half is overlapped and joined by, for example, a bolt or the like.

The low-pressure turbine 13 and the reverse turbine 15 are connected via a single rotating shaft (shaft) 21.
The rotating shaft 17 and the rotating shaft 21 are connected to a speed reducer 23. A propeller 7 is connected to the speed reducer 23 via a propeller shaft 25. A shaft generator 26 is attached to the propeller shaft 25.

The marine reheat boiler 5 includes a boiler body 30 including a main furnace (main boiler) 27 and a reheat furnace 29, a reheater 61, a duct 62, and an expansion joint 64.
The main furnace 27 includes a hollow furnace 31 having a substantially rectangular parallelepiped shape, a main burner 33 installed on the top of the furnace 31, a front bank tube 35, a superheater 37 composed of a plurality of U-shaped tubes, and evaporation. A tube group 39, a water drum 41, and a steam drum 43 are provided.
A wall tube 45 is disposed on the wall portion of the furnace 31. The main burner 33 is supplied with fuel from a fuel supply source (not shown) through a fuel pipe 47. The fuel pipe 47 is provided with a flow rate adjusting valve 49 that adjusts the amount of fuel supplied, and a flow meter 51 that detects the amount of fuel supplied downstream of the flow rate adjusting valve 49.

  The reheating furnace 29 extends in the vertical direction on the downstream side of the evaporation tube group 39 of the main furnace 27 and is configured to serve as a passage for combustion gas generated by the combustion of the main burner 33. A reheating burner 53 is provided at the lower part of the reheating furnace 29. In addition, a reheater 61 constituted by a reheater tube 60 through which steam passes is provided in the upper part of the reheat furnace 29.

The superheater 37 receives saturated steam from the steam drum 43 at the end on the evaporator tube group 39 side, and superheats it while passing to the end on the furnace 31 side to produce superheated steam. The superheated steam is introduced from the end of the superheater 37 on the furnace 31 side through the superheater outlet pipe 63 into the high-pressure turbine 9.
The superheater outlet pipe 63 is connected to a superheat branch pipe 65 that branches in the middle and supplies superheated steam to the reverse turbine 15. An on-off valve 67 is provided in the middle of the superheater outlet pipe 63 located on the downstream side of the branch part, and an on-off valve 68 is provided on the overheat branch pipe 65 located on the downstream side of the branch part. Then, by selectively opening and closing the on-off valves 67 and 68, the superheated steam is supplied to either the high-pressure turbine 9 or the reverse turbine 15.

  The outlet steam of the high-pressure turbine 9 is introduced into the lower end portion of the reheater pipe 60 through the reheater introduction pipe 69, and the residual heat amount of the combustion gas generated by the combustion of the main burner 33 and the combustion of the reheat burner 53. Heated with gas. The reheat steam reheated by the reheater 61 is introduced from the upper end portion of the reheater pipe 60 through the reheater outlet pipe 71 to the intermediate pressure turbine 11.

In addition, the code | symbol 79 in FIG. 1 has shown the condenser.
Further, in the marine propulsion plant 1, for example, when superheated steam is supplied to the reverse turbine 15, the superheated steam is not supplied to the high-pressure turbine 9, so that steam is not supplied to the reheater 61. In this case, since the heat absorption capacity of the steam is substantially zero, the combustion of the reheat burner 53 needs to be stopped.
Furthermore, since the ship does not know when it will move backwards during harbor navigation, it is unclear when superheated steam will be supplied to the reverse turbine. Therefore, in consideration of safety, it is desirable to stop the combustion of the reheat burner 53 in the navigation mode in which the port sails.

Next, the operation of the marine propulsion plant 1 provided with the marine reheat boiler 5 according to the present embodiment configured as described above will be described.
Combustion gas generated by the combustion of the main burner 33 flows from the furnace 31 through the front bank tube 35, the superheater 37, and the evaporation tube group 39 while exchanging heat. On the other hand, the combustion gas that has passed through the evaporator tube group 39 is mixed with the combustion gas generated by the combustion of the reheat burner 53, exchanges heat with the reheater 61, and then exhausted.

At this time, the saturated steam supplied from the steam drum 43 to the superheater 37 is superheated by the combustion gas and becomes superheated steam. The superheated steam generated in the superheater 37 is supplied to the high-pressure turbine 9 and rotationally drives the high-pressure turbine 9.
The steam exhausted from the high pressure turbine 9 is supplied to the reheater 61 and reheated by the combustion gas such as the reheat burner 53. The reheat steam reheated by the reheater 61 is supplied to the intermediate pressure turbine 11 to drive the intermediate pressure turbine 11 to rotate.

The steam exhausted from the intermediate pressure turbine 11 is supplied to the low pressure turbine 13 to rotate the low pressure turbine 13. The steam exhausted from the low pressure turbine 13 is sent to the condenser 79. The water condensed by the condenser 79 is supplied to the main furnace 27.
The rotation of the high-pressure turbine 9 and the intermediate-pressure turbine 11 is transmitted to the speed reducer 23 through the rotation shaft 17, and the rotation of the low-pressure turbine 13 is transmitted through the rotation shaft 21. The speed reducer 23 rotates the propeller shaft 25 at the decelerated rotational speed and rotates the propeller 7.

  Here, an exhaust gas outlet 29A (see FIGS. 5 and 7) provided at the upper end of the reheating furnace 29 and an exhaust gas inlet (not shown) provided at the lower end of the reheater 61 are shown in FIG. And a duct 62 and an expansion joint 64 shown in FIG. The exhaust gas flowing out from the exhaust gas outlet 29A provided at the upper end of the reheating furnace 29 passes through the expansion joint (expansion joint) 64 and the duct 62 in this order and is led to the exhaust gas inlet provided at the lower end of the reheater 61. Then, it flows into the reheater 61 from the exhaust gas inlet provided at the lower end of the reheater 61.

The expansion joint 64 is, for example, a member having an upper (lower) surface-shaped shape as shown in FIG. 6 having a length of 2300 mm, a width of 4600 mm, and a height of 700 mm. As shown in FIGS. A casing 81, an inner casing 82, a heat insulating material (heat insulating material) 83, and a height dimension reducing mechanism 84 are provided.
The outer casing 81 includes a (first) U-shaped member 91 that exhibits a (substantially) U-shaped cross-sectional view, a (second) U-shaped member 92 that exhibits a (substantially) U-shaped cross-section, and a cross-section. And an arcuate member 93 exhibiting a visual (substantially) arcuate shape.

The U-shaped member 91 is a member disposed on the upper side in the height direction of the expansion joint 64, and includes a (first) flange plate 94, a vertical plate 95, a horizontal plate 96, and a (second) flange. And a plate 97.
The flange plate 94 extends along the horizontal direction and the circumferential direction, and an inner peripheral end thereof is connected to an upper end of the vertical plate 95, forms an exhaust gas inlet at a lower end of the duct 62, and is formed in the horizontal direction and the peripheral direction. This is a flat plate member joined by welding to a flange plate 62A (see FIGS. 2, 5, and 7) extending along the direction.

The vertical plate 95 extends along the vertical direction and the circumferential direction, and its upper end is connected to the inner peripheral end of the flange plate 94, and its lower end is connected to the inner peripheral end of the horizontal plate 96. It is a flat member that connects the peripheral end and the inner peripheral end of the horizontal plate 96.
The horizontal plate 96 extends along the horizontal direction and the circumferential direction, and its inner peripheral end is connected to the lower end of the vertical plate 95, and its outer peripheral end is connected to the lower end of the flange plate 97, It is a flat member that connects the lower end of the flange plate 97.
The flange plate 97 is a flat plate-like member that extends along the vertical direction and the circumferential direction, and that has a lower end connected to the outer peripheral end of the horizontal plate 96.

The U-shaped member 92 is a member disposed on the lower side in the height direction of the expansion joint 64, and includes a (first) flange plate 98, a vertical plate 99, a horizontal plate 100, and a (second). And a flange plate 101.
The flange plate 98 extends along the horizontal direction and the circumferential direction, and an inner peripheral end thereof is connected to a lower end of the vertical plate 99, and an exhaust gas outlet 29 </ b> A is formed at an upper end of the reheating furnace 29. It is a flat plate-like member joined by welding to a flange plate 29B (see FIGS. 5 and 7) extending along the direction and the circumferential direction.

The vertical plate 99 extends along the vertical direction and the circumferential direction, and its lower end is connected to the inner peripheral end of the flange plate 98, and its upper end is connected to the inner peripheral end of the horizontal plate 100. It is a flat member that connects the peripheral end and the inner peripheral end of the horizontal plate 100.
The horizontal plate 100 extends along the horizontal direction and the circumferential direction, and its inner peripheral end is connected to the upper end of the vertical plate 99, and its outer peripheral end is connected to the upper end of the flange plate 101. It is a flat plate member that connects the upper end of the flange plate 101.
The flange plate 101 is a plate-like member that extends along the vertical direction and the circumferential direction, and whose upper end is connected to the outer peripheral end of the horizontal plate 100.

The arc-shaped member 93 is a member that connects the flange plate 97 of the U-shaped member 91 and the flange plate 101 of the U-shaped member 92, and includes a (first) flange portion 102, a flexible portion 103, (Second) flange portion 104.
The flange portion 102 is a flat plate-like member that extends along the vertical direction and the circumferential direction and has a lower end connected to the upper end of the flexible portion 103.

The flexible portion 103 extends along the vertical direction and the circumferential direction, and the upper end thereof is connected to the lower end of the flange portion 102, the lower end thereof is connected to the upper end of the flange portion 104, the lower end of the flange portion 102, and the flange It is a plate-like member that connects the upper end of the portion 104 and has a circular arc shape in a sectional view and has flexibility along the height direction of the expansion joint 64.
The flange portion 104 is a flat plate-like member that extends along the vertical direction and the circumferential direction, and has an upper end connected to the lower end of the flexible portion 103.

The inner casing 82 includes a T-shaped member 111 having a T-shape in a sectional view (substantially) and an S-shaped member 112 having a S-shape in a sectional view (substantially).
The T-shaped member 111 is a member disposed on the upper side of the expansion joint 64 in the height direction, and includes a vertical plate 113 and a horizontal plate 114.

The vertical plate 113 is a plate-like member that extends along the vertical direction and the circumferential direction, and has a (substantially) center in the height direction connected to the inner peripheral end of the horizontal plate 114.
The horizontal plate 114 is a flat plate-like member that extends along the horizontal direction and the circumferential direction, and has an inner peripheral end connected to a (substantially) center in the height direction of the vertical plate 113.

The S-shaped member 112 is a member disposed on the lower side in the height direction of the expansion joint 64, and includes a (first) vertical plate 115, a swash plate 116, a (second) vertical plate 117, It has.
The vertical plate 115 is a flat plate-like member that extends along the vertical direction and the circumferential direction, and that has a lower end connected to an upper end of the swash plate 116.

The swash plate 116 is inclined so that the upper end is located outside the lower end, and extends along the circumferential direction, and the upper end is connected to the lower end of the vertical plate 115, and the lower end is connected to the upper end of the vertical plate 116. It is a flat plate member that is connected and connects the lower end of the vertical plate 115 and the upper end of the vertical plate 117.
The vertical plate 117 is a flat plate-like member that extends along the vertical direction and the circumferential direction, and has an upper end connected to the lower end of the swash plate 116.

T-shaped member 111 and S-shaped member 112 are stud bolt 118 inserted into a through-hole penetrating in the thickness direction of vertical plate 113 and vertical plate 117, and a male screw provided on the outer peripheral surface of stud bolt 118, respectively. The vertical plate 95 and the U-shape of the U-shaped member 91 via the nut 119 provided with the female thread portion screwed to the inner portion and the washer 120 arranged so as to sandwich the vertical plates 113 and 117. It is connected to the vertical plate 99 of the member 92.
The stud bolt 118 extends along the horizontal direction and the circumferential direction, and the outer peripheral ends thereof are joined to the vertical plates 95 and 99 by welding.
Further, between the outer casing 81 and the inner casing 82, a heat insulating material 83 stacked along the horizontal direction is arranged along the circumferential direction.

  The height dimension reducing mechanism 84 includes a (first) L-shaped member 131 having an L-shape in cross-section, a (second) L-shaped member 132 having an L-shape in cross-section, a stud bolt 133, and the like. And a nut 134.

The L-shaped member 131 is a member disposed on the upper side in the height direction of the expansion joint 64, and includes a vertical plate 135 and a horizontal plate 136.
The vertical plate 135 is a flat plate-like member that extends along the vertical direction and the circumferential direction, and that has a lower end connected to the inner peripheral end of the horizontal plate 136.
The horizontal plate 136 is a flat plate member that extends along the horizontal direction and the circumferential direction, and has an inner peripheral end connected to the lower end of the vertical plate 135.

The L-shaped member 132 is a member disposed on the lower side of the expansion joint 64 in the height direction, and includes a vertical plate 137 and a horizontal plate 138.
The vertical plate 137 is a plate-like member that extends along the vertical direction and the circumferential direction, and has an upper end connected to the inner peripheral end of the horizontal plate 138.
The horizontal plate 138 is a plate-like member that extends along the horizontal direction and the circumferential direction, and has an inner peripheral end connected to an upper end of the vertical plate 137.

The flange plate 97 of the U-shaped member 91, the flange portion 102 of the arc-shaped member 93, and the vertical plate 135 of the L-shaped member 131 penetrate in the thickness direction of the flange plate 97, the flange portion 102, and the vertical plate 135. The bolt 139 inserted through the through hole and the female screw portion screwed with the male screw portion provided on the outer peripheral surface of the bolt 139 are connected to each other via a nut 140 provided on the inner peripheral surface.
The flange plate 101 of the U-shaped member 92, the flange portion 104 of the arc-shaped member 93, and the vertical plate 137 of the L-shaped member 132 penetrate through the flange plate 101, the flange portion 104, and the vertical plate 137 in the plate thickness direction. A bolt 141 inserted through the through-hole and a female screw portion screwed with a male screw portion provided on the outer peripheral surface of the bolt 141 are connected to each other via a nut 142 provided on the inner peripheral surface.

  The horizontal plate 136 of the L-shaped member 131 and the horizontal plate 138 of the L-shaped member 132 are a stud bolt 133 inserted through a through hole penetrating in the plate thickness direction of the horizontal plates 136 and 138, and an outer periphery of the bolt 133. A female screw portion that is screwed with a male screw portion provided on the surface is connected via a nut 134 provided on the inner peripheral surface.

Here, in this embodiment, the U-shaped member 91 and the U-shaped member 92 are each made of carbon steel, and the T-shaped member 111 and the S-shaped member 112 are each made of stainless steel.
Moreover, in this embodiment, the heat insulating material 83 is made of ceramic fiber having both excellent heat insulating properties and heat resistance, and the arcuate member 93 is made of glass cloth.
A heat insulating material 83 (see FIGS. 3 and 4) laminated along the horizontal direction is also arranged along the circumferential direction on the inner surface of the duct 62, and the inner surface of the heat insulating material 83 is a flat plate made of stainless steel. It is covered with a shaped member.

Next, a method for assembling the marine reheat boiler according to the present embodiment will be described with reference to FIGS.
First, as shown in FIG. 5, a plurality of units provided on a deck D1 (see FIG. 8) on which a main body 27 (see FIG. 1) including a main furnace 27 (see FIG. 1) and a reheating furnace 29 are installed. The boiler main body 30 is installed and fixed to the (first) fixing legs 73 (see FIG. 8) (for example, four).
Next, as shown in FIG. 5, a plurality (for example, four) of decks D1 on which the boiler body 30 is installed are provided on a deck (upper deck) D2 (see FIG. 8) immediately above. The reheater 61 (refer to FIG. 1) to which the duct 62 is attached in advance is installed and fixed to the (second) fixed leg 74 (refer to FIG. 8).

Subsequently, in the bow direction, the stern direction, the port direction, and the starboard direction between the exhaust gas outlet 29A provided at the upper end of the reheating furnace 29 and the exhaust gas inlet (not shown) provided at the lower end of the duct 62. Measure the deviation.
Next, as shown in FIG. 6, the expansion joint 64 is manufactured separately at a factory or the like based on the measured deviation in the bow direction, stern direction, port direction, starboard direction, and then carried to the assembly site with a crane or the like. To do.

Subsequently, the nut 134 positioned below the L-shaped member 131 and the nut 134 positioned above the L-shaped member 132 are loosened in such a direction that they approach each other.
Next, the nut 134 positioned on the upper side of the L-shaped member 131 and the nut 134 positioned on the lower side of the L-shaped member 132 are tightened so that these nuts 134 approach each other, and the height direction of the expansion joint 64 For example, 30 mm to 50 mm is reduced (decreased).

Subsequently, with the dimension in the height direction of the expansion joint 64 reduced, the expansion joint 64 is formed with an exhaust gas outlet 29A at the upper end of the reheating furnace 29 as shown in FIG. And a gap (space) formed between the flange plate 29B extending along the circumferential direction and the flange plate 62A that forms an exhaust gas inlet at the lower end of the duct 62 and extends along the horizontal direction and the circumferential direction. Insert it.
Next, when the expansion joint 64 is inserted to a position where the flange plate 29B and the flange plate 98 (see FIG. 3) are aligned, the nut 134 positioned above the L-shaped member 131 and the lower side of the L-shaped member 132 are inserted. These nuts 134 are loosened in such a direction that the nuts 134 located in the direction away from each other.

Subsequently, the nut 134 positioned below the L-shaped member 131 and the nut 134 positioned above the L-shaped member 132 are tightened in a direction away from each other, and the height direction of the expansion joint 64 is increased. Return the dimensions at to the original dimensions at the time of manufacture.
Next, as shown in FIG. 2, the flange plate 29B and the flange plate 98 are joined by welding, the flange plate 62A and the flange plate 94 are joined by welding, and the assembly process of the expansion joint 64 is completed. .

According to the marine reheat boiler 5 and its assembling method according to the present embodiment, the duct 62 is processed on-site in accordance with the deviation in the bow direction, stern direction, port direction, starboard direction in the assembling process at the time of ship outfitting. The expansion joint 64 separately manufactured at a factory or the like based on the deviation in the bow direction, stern direction, port direction, and starboard direction is connected to the exhaust gas outlet 29A provided at the upper end of the reheating furnace 29. It only needs to be inserted into a gap formed between the lower end of the duct 62 and an exhaust gas inlet (not shown).
Thereby, simplification of the assembly process at the time of outfitting of a ship can be aimed at, and the loading time to a ship can be shortened.

According to the marine reheat boiler 5 and the assembly method thereof according to the present embodiment, the expansion joint 64 is reheated in a state in which the dimension in the height direction of the expansion joint 64 is reduced (decreased) by, for example, 30.8 mm. The gas is inserted into a gap formed between the exhaust gas outlet 29 </ b> A provided at the upper end of the furnace 29 and the exhaust gas inlet provided at the lower end of the duct 62. That is, the expansion joint 64 is inserted with a gap formed between the lower end of the expansion joint 64 and the upper end of the reheating furnace 29 and / or between the upper end of the expansion joint 64 and the lower end of the duct 62. Will go.
Thereby, the further simplification of the assembly process at the time of outfitting of a ship can be aimed at, and the mounting time to a ship can further be shortened.

  According to the marine reheat boiler 5 according to the present embodiment, since the inner surfaces of the duct 62 and the expansion joint 64 are covered with the heat insulating material, it is possible to cope with a recent increase in exhaust gas temperature (450 ° C. or higher). it can.

  Further, according to the marine reheat boiler 5 according to the present embodiment, the inner surface side (the side that becomes the flow path of the exhaust gas) of the heat insulating material 83 is covered by the inner casing 82, and thus is included in the exhaust gas. It is possible to prevent moisture (humidity) from being absorbed by the heat insulating material 83 and the heat insulating material 83 from being deteriorated to deteriorate the heat insulating performance.

  In addition, this invention is not limited to embodiment mentioned above, It can also implement by changing and changing suitably as needed.

5 Marine Reheat Boiler 27 Main Furnace 29 Reheat Furnace 29A Exhaust Gas Outlet 30 Boiler Body 61 Reheater 62 Duct 64 Expansion Joint 83 Heat Insulation Material 84 Height Size Reduction Mechanism

Claims (3)

A boiler body provided with a main furnace and a reheat furnace, and a reheater, a duct provided at an upper end of the reheat furnace as an exhaust gas outlet and a lower end of the reheater as an exhaust gas inlet And an expansion joint of a marine reheat boiler connected via an expansion joint disposed between the duct and the reheat furnace,
An outer casing;
An inner casing;
A heat insulating material disposed between the outer casing and the inner casing;
A height dimension reduction mechanism that reduces the dimension in the height direction,
The inner casing is
A first member disposed on the upper side in the height direction and extending along the height direction;
A second member disposed on the lower side in the height direction and inclined so that an upper end is positioned on the outer casing side with respect to a lower end,
The upper end of the second member is located outside the lower end of the first member;
The upper end of the reheating furnace when the boiler main body is installed on a deck of a ship, and the reheater in which the duct is attached in advance on the deck immediately above the deck on which the boiler main body is installed When, with the duct, the bow direction, aft direction, the port direction, expansion joints marine reheat boiler, wherein the shape der Rukoto based on displacement in the starboard direction. A marine reheat boiler comprising the expansion joint of the marine reheat boiler according to claim 1 . A ship comprising the marine reheat boiler according to claim 2 .

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