JP6064708B2 - boiler - Google Patents

Description

  The present invention relates to a boiler.

  Conventionally, a boiler that generates steam by heating water with combustion gas generated by burning fuel in a can body is known. In such a boiler, by providing an economizer (feed water heater) that exchanges heat between water supplied to the can body and the combustion gas after being used to generate steam, Thermal efficiency is improved by heat recovery. In order to further improve the thermal efficiency of the boiler, a boiler is further proposed that further includes an air heater that performs heat exchange between the combustion air supplied to the can body and the combustion gas in addition to the economizer (for example, , See Patent Document 1).

  By the way, when installing a boiler, after first fixing a heavy can, economizer, and air heater to a frame, the can, economizer, and air heater fixed to the frame are connected by a duct such as an exhaust passage. .

JP 11-118104 A

  However, there are cases in which connection by a duct becomes difficult due to slight errors that occur during the manufacture of cans, economizers, and air heaters or when these are installed. That is, when the can, the economizer, and the air heater fixed to the pedestal are connected by the duct, there is a case where a gap or a gap occurs between the can, the economizer, or the air heater and the duct.

  An object of the present invention is to provide a boiler capable of preventing the occurrence of a shift or a gap in a connection portion between a part constituting the boiler and the duct when the parts constituting the boiler are connected by a duct.

  The present invention includes a can body that generates steam by burning fuel and heating feed water, an air supply path that supplies combustion air to the can body, and a water supply path that supplies the feed water to the can body A base end side connected to the can body, an exhaust passage for discharging combustion gas generated by combustion of the fuel, a feed water heater provided in the feed water passage for heating the feed water, and the supply air And a supply air heater for heating the combustion air provided in a passage, wherein the exhaust passage constitutes a part of the feed water heater, and the combustion gas and the feed water A feed water heat exchanging part that exchanges heat between the two parts, a feed air heat exchanging part that constitutes a part of the charge air heater and exchanges heat between the combustion gas and the combustion air, and the feed water heat A cylindrical connection path connecting the exchange unit and the charge air heat exchange unit, the feed water heat exchange unit and the contact It is disposed so as to be interposed between the road, and the first position adjusting member slidable in the height direction relative to the water supply heat exchanger or the connecting channel, to a boiler comprising a.

  Moreover, it is preferable that the feed water heater and the feed air heater are arranged on the side of the can body, and the connection path connects the upper surface of the feed water heater and the upper surface of the feed air heater. .

  Further, it is preferable that the connection path is connected to an upper surface of the supply air heater and is fixed to the supply air heater so that the position thereof can be adjusted in the horizontal direction.

  The connection path includes a feed water heater side connection path disposed on the feed water heater side, a feed air heater side connection path disposed on the feed air heater side, and the feed water heater side connection path. And a second position adjusting member that is slidable in a horizontal direction with respect to the feed water heater side connection path or the feed air heater side connection path. It is preferable.

  The connection path includes a feed water heater side connection path disposed on the feed water heater side, a feed air heater side connection path disposed on the feed air heater side, and the feed water heater side connection path. And a second position adjusting member that is slidable in a horizontal direction with respect to the feed water heater side connection path or the feed air heater side connection path. It is preferable.

  The first position adjusting member is disposed on one end side of the sliding cylinder portion slidable with respect to the outer peripheral surface or the inner peripheral surface of the connection path, and on the other end side of the sliding cylinder portion. And a flange portion connected to the heat exchange portion.

  The feed water heat exchanging section includes a main body section that performs heat exchange, and a heat exchanging section side cylinder section that is disposed at an end portion on the secondary side of the main body section, and the first position adjustment member includes: A sliding cylinder part whose one end side is slidable with respect to an outer peripheral surface or an inner peripheral surface of the heat exchange part side cylinder part, and a flange that is disposed on the other end side of the sliding cylinder part and connected to the connection path It is preferable to provide a part.

  ADVANTAGE OF THE INVENTION According to this invention, when connecting the components which comprise a boiler with a duct, the boiler which can prevent generation | occurrence | production of the shift | offset | difference and clearance gap in the connection part of the components which comprise a boiler, and a duct can be provided.

It is a perspective view showing the boiler concerning a 1st embodiment of the present invention. It is a schematic block diagram which shows the boiler body which concerns on the said embodiment, Fig.2 (a) is a vertical direction sectional view seen from the arrow F of FIG. 1, FIG.2 (b) is FIG.2 (a). It is a horizontal direction sectional view of an AA line. It is the external view which showed typically the boiler which concerns on the said embodiment, Fig.3 (a) is the figure which looked at the boiler from the arrow G of FIG. 1, FIG.3 (b) is a boiler from the front side. FIG. 3C is a side view of the air supply side as viewed, FIG. 3C is a side view of the exhaust side when the boiler is viewed from the back side, and FIG. 3D is a top view of the boiler. It is an expanded sectional view of the 1st position adjustment member of the boiler concerning the above-mentioned embodiment, the feed water heat exchange part of the 1st position adjustment member, and the connection part with a connection way. It is an expanded sectional view of the connection part with the 2nd position adjustment member of a boiler concerning the above-mentioned embodiment, and a feed water heater side connection way and a supply air heater side connection way of the 2nd position adjustment member. It is an expanded sectional view of the connection part with the 1st position adjustment member of the boiler concerning a 2nd embodiment of the present invention, and the feed water heat exchange part of the 1st position adjustment member, and a connection way.

A first embodiment of the present invention will be described below with reference to the drawings.
First, the configuration of the boiler 1 according to the first embodiment will be described.
FIG. 1 is a perspective view showing a boiler 1 according to the present embodiment. Moreover, FIG. 2 is a schematic block diagram which shows the can 10 of the boiler 1 which concerns on this embodiment, FIG. 2 (a) is a vertical direction sectional view seen from the arrow F of FIG. (B) is a horizontal direction sectional view of the AA line of Drawing 2 (a).

  As shown in FIG. 1, the boiler 1 of the present embodiment includes a can 10, a blower 30 (see FIG. 3), an air supply duct (air supply path according to the present invention) 60, and an exhaust pipe (in the present invention). Such an exhaust passage) 80, a water supply passage 70 (see FIG. 3C), a water supply heater 40, an air supply heater 50, and a support 20 are provided.

  As shown in FIG. 2, the can 10 includes a boiler housing 10 a, a water pipe group 11, a connecting wall 12, a lower header 13, an upper header 14, and a burner 16.

The boiler housing 10a is formed in a rectangular parallelepiped shape in a plan view. An air supply port 15 is formed on a side surface located on one end side in the longitudinal direction of the boiler housing 10a, and an exhaust port 17 is formed on a side surface located on the other end side in the longitudinal direction of the boiler housing 10a.
A front end portion of an air supply duct 60 described later is connected to the air supply port 15. The exhaust port 17 is connected to a base end portion of an exhaust cylinder 80 described later.

The water tube group 11 includes a large number of water tubes extending in the vertical direction. Canned water heated by the combustion of the burner 16 is held in each water pipe constituting the water pipe group 11.
The water tube group 11 is composed of an outer water tube 11a cascading at both ends, a central water tube 11b cascading in the middle, an outer water tube 11a It is classified into an intermediate water pipe 11c cascading between the central water pipe 11b.
The connection wall 12 connects adjacent outer water pipes 11a.

  The lower header 13 is configured by a rectangular parallelepiped container having a rectangular shape in plan view, and is disposed below the water tube group 11. The lower header 13 is connected to lower ends of a plurality of water pipes constituting the water pipe group 11.

The upper header 14 is configured by a rectangular parallelepiped container having a rectangular shape in plan view, and is disposed above the water tube group 11. The upper header 14 is connected to upper ends of a plurality of water pipes constituting the water pipe group 11.
Connected to the upper part of the upper header 14 is a steam outlet pipe 19 (see FIGS. 1 and 3) for allowing the steam inside the upper header 14 to flow out.

A region surrounded by the outer water pipe 11a, the connecting wall 12, the lower header 13, and the upper header 14 forms a rectangular parallelepiped gas flow space 18. The gas flow space 18 has an upstream side communicating with the air supply port 15 and a downstream side communicating with the exhaust port 17.
The burner 16 is disposed in the air supply port 15.

  FIG. 3 is an external view showing the boiler 1 according to the present embodiment, FIG. 3A is a view of the boiler 1 as viewed from an arrow G of FIG. 1, and FIG. FIG. 3C is a side view of the exhaust side when the boiler 1 is viewed from the back side, and FIG. 3D is a top view of the boiler 1. It is.

The blower 30 is disposed adjacent to the can body 10 at the lower portion of the side surface on the long side of the can body 10. The blower 30 has air wheel blades.
The air wheel blades are disposed inside the blower 30. As the air wheel blades rotate, the combustion air is drawn into the blower 30 and sent out to the air supply duct 60.

  The blower 30 has the air wheel blades and the motor as the driving source as described above, and has a large weight. Therefore, the gravity center of the boiler 1 can be stabilized by arranging the blower 30 at the lower part of the side surface of the can 10.

The air supply duct 60 connects the blower 30 and the can body 10, and supplies the combustion air sent from the blower 30 to the can body 10.
As shown in FIGS. 1 and 3, the air supply duct 60 includes a first upward air supply passage portion 61, a first horizontal air supply passage portion 62, a second upward air supply passage portion 63, and a second horizontal supply air supply. It has an air passage portion 64 and a downward air supply passage portion 65.

  The first upward air supply passage portion 61 extends upward along the side surface of the can body 10 from the connection portion with the blower 30 as shown in FIGS. 1, 3 </ b> B, and 3 </ b> C.

  The first horizontal air supply passage 62 is connected to the upper end of the first upward air supply passage 61 and is separated from the can 10 as shown in FIGS. Extends horizontally.

  As shown in FIGS. 1 and 3A to 3C, the second upward air supply path portion 63 extends upward from the distal end portion of the first horizontal air supply path portion 62.

  As shown in FIGS. 1 and 3D, the second horizontal air supply path portion 64 extends in the horizontal direction from the upper end portion of the second upward air supply path portion 63 toward the can body 10, and in the middle of the can body 10 The side of the air supply side is bent and extends in the horizontal direction.

  As shown in FIG. 1 and FIG. 3B, the downward air supply passage portion 65 extends downward from the tip of the second horizontal air supply passage portion 64 along the air supply side surface of the can body 10. Connected to the mouth 15. The tip of a fuel supply line 91 that supplies fuel gas to the air supply duct 60 is connected to the downward air supply path 65 (see FIG. 2A).

  According to the above air supply duct 60, the combustion air sent out from the blower 30 moves upward through the first upward air supply passage portion 61 and the second upward air supply passage portion 63 as shown in FIG. After the circulation, the second horizontal air supply passage portion 64 is distributed in the horizontal direction, and then the downward air supply passage portion 65 is distributed downward to be supplied to the can body 10. Further, in the downward air supply passage 65, the fuel gas is supplied from the fuel supply line 91, and the fuel gas and the combustion air are mixed.

The water supply path 70 is a water passage through which water serving as can water is circulated, and supplies can water to the can body 10.
As shown in FIG. 3C, the water supply path 70 has a portion that extends downward along the side surface on the exhaust side of the can 10.

The exhaust cylinder 80 is connected to the can body 10 (exhaust port 17 formed in the boiler housing 10 a) at the base end side, and discharges the combustion gas generated in the can body 10.
The exhaust pipe 80 includes a feed water heat exchange unit 81, a first position adjustment member 82, a connection path 83, a supply air heat exchange unit 84, a horizontal exhaust path unit 85, and an upward exhaust path unit 86.

  As shown in FIGS. 1 and 3C, the feed water heat exchanging portion 81 extends upward from a base end that is a connection portion with the exhaust port 17 along the side surface on the exhaust side of the can 10. The feed water heat exchange part 81 comprises a part of feed water heater 40, and performs heat exchange between combustion gas and feed water.

  As shown in FIG. 1 and FIG. 3A, the supply air heat exchanging portion 84 extends downward from a distal end portion of a connection path 83 to be described later. The supply air heat exchange unit 84 constitutes a part of the supply air heater 50, and performs heat exchange between the combustion gas and the combustion air.

The connection path 83 connects the upper surface of the feed water heat exchange unit 81 and the upper surface of the supply air heat exchange unit 84.
The connection path 83 includes a feed water heater side connection path 831 disposed on the feed water heater 40 side, a feed air heater side connection path 832 and a feed water heater side connection path 831 disposed on the feed air heater 50 side. A second position adjusting member 833 that connects the supply air heater side connection path 832.

As shown in FIG. 1 and FIGS. 3 (c) and 3 (d), the feed water heater side connection path 831 extends upward from the upper end of the feed water heat exchange unit 81, bends in the horizontal direction, and It extends so as to cross the boiler 1 diagonally toward the side surface on which the blower 30 is disposed. The feed water heater side connection path 831 is formed in a cylindrical shape.
An end of the feed water heater side connection path 831 on the feed water heat exchanging portion 81 side is connected to the feed water heat exchanging portion 81 via the first position adjustment member 82.

The feed air heater side connection path 832 extends in the horizontal direction from the tip of the feed water heater side connection path 831 to the upper side of the feed air heater 50 as shown in FIG. 1 and FIGS. Then, it is bent downward and connected to the supply air heat exchange section 84. The feed water heater side connection path 831 side of the feed air heater side connection path 832 is formed in a cylindrical shape, and the feed air heat exchange section 84 side of the feed air heater side connection path 832 is formed in a box shape with the lower side open. Is done.
A flange portion 832 a having a plurality of through holes 832 b is formed on the supply air heat exchange portion 84 side of the supply air heater side connection path 832. The supply air heater side connection path 832 is fixed to the supply air heater 50 by inserting and tightening a screw member (not shown) into the through hole 832b.
Here, the plurality of through holes 832b are formed in a substantially elliptical shape that is long in the direction D3 shown in FIG. Thereby, supply air heater side connection channel 832 (connection channel 83) is connected to supply air heater 50 so that position adjustment is possible in the horizontal direction (D3 direction).

  The 2nd position adjustment member 833 connects the feed water heater side connection path 831 and the feed air heater side connection path 832 as shown in FIG.1 and FIG.3 (b)-(d). The second position adjusting member 833 will be described in detail later.

As shown in FIG. 1 and FIGS. 3A and 3C, the first position adjustment member 82 is disposed between the feed water heat exchange unit 81 and the connection path 83.
The connection portion of the first position adjustment member 82, the feed water heat exchange section 81, and the connection path 83 with the first position adjustment member 82 will be described in detail later.

As shown in FIGS. 1 and 3A, the horizontal exhaust passage 85 is arranged in the horizontal direction so as to be separated from the can body 10 from the lower end portion of the supply air heat exchange section 84 to the side surface on the exhaust side of the can body 10. Extend to.
As shown in FIGS. 1 and 3A, the upward exhaust passage portion 86 extends upward from the tip portion of the horizontal exhaust passage portion 85.

  According to the exhaust cylinder 80 described above, the combustion gas discharged from the can body 10 circulated upward through the feed water heat exchange unit 81, the first position adjustment member 82, and the connection path 83, as shown in FIG. Then, it distribute | circulates the connection path 83 to a horizontal direction, and distribute | circulates the connection path 83 and the supply air heat exchange part 84 below downward, distribute | circulates the horizontal exhaust path part 85 and the upward exhaust path part 86, and is discharged | emitted. .

The feed water heater 40 is disposed in the vicinity of the side surface on the exhaust side located on the short side of the can 10. The feed water heater 40 performs heat exchange between the water flowing through the water supply passage 70 and the combustion gas flowing through the exhaust pipe 80.
More specifically, as shown in FIGS. 3 (c) and 3 (d), the feed water heater 40 includes a water supply path 70 that extends downward along a side surface on the exhaust side of the can body 10, and exhaust of the can body 10. It arrange | positions in the part located facing the water supply heat-exchange part 81 extended upwards along the side surface of a side (parallel).
In the feed water heater 40, a fluid flow is generated in which a feed water passage 70 that circulates water from above to below and a feed water heat exchanger 81 that circulates combustion gas from below to above are opposed to each other.

The supply air heater 50 is arranged with the blower 30 interposed between the long side surfaces of the can body 10. The supply air heater 50 exchanges heat between the combustion air flowing through the supply air duct 60 and the combustion gas flowing through the exhaust pipe 80.
More specifically, as shown in FIG. 1 and FIG. 3A, the supply air heater 50 includes a supply air heat exchanging portion 84 that extends downward and a second upward supply passage portion 63 that extends upward. It is arranged in the part located opposite (parallel). That is, the supply air heater 50 recovers heat from the combustion gas heat-exchanged in the supply water heater 40 to heat the combustion air.
In the air supply heater 50, a gas flow is generated in which the second upward air supply passage portion 63 that circulates combustion air upward from below and the air supply heat exchange portion 84 that circulates combustion gas downward from above are opposed to each other. ing.

  The support 20 supports members that constitute the boiler 1.

Next, the operation of the boiler 1 will be described.
The boiler 1 draws combustion air by the blower 30 and sends it out to the air supply duct 60.
In the air supply duct 60, the combustion air sent out from the blower 30 circulates upward through the first upward air supply passage portion 61 and the second upward air supply passage portion 63 as shown in FIG. The two horizontal air supply passage portions 64 are circulated in the horizontal direction, and then the downward air supply passage portion 65 is circulated downward.
In the downward air supply passage 65, the fuel gas is supplied from the fuel supply line 91, the fuel gas and the combustion air are mixed, and the mixed gas is supplied to the air supply port 15.

  In the can 10, the mixed gas is injected into the gas flow space 18 by the burner 16 and burned. By the combustion of the mixed gas, the can water in the water pipes constituting the water pipe group 11 boils to generate steam. The steam generated in the water pipe is led out from the steam outflow pipe 19 after being stored in the upper header 14.

On the other hand, the combustion gas burned in the gas flow space 18 is discharged from the exhaust port 17 to the exhaust pipe 80.
The combustion gas discharged to the exhaust pipe 80 flows through the feed water heat exchange unit 81 upward and flows through the feed water heater 40. At this time, the first heat exchange is performed between the combustion gas flowing through the feed water heat exchange unit 81 and the water flowing through the feed water passage 70.

Next, the combustion gas that has flowed through the feed water heater 40 and exchanged heat for the first time flows through the connection path 83, and then flows downward through the supply air heat exchanger 84 to supply the air heater. 50 inside. At this time, the second heat exchange is performed between the combustion gas flowing through the supply air heat exchange unit 84 and the combustion air flowing through the supply air duct 60 (second upward air supply passage unit 63).
Since the combustion gas exchanges heat with the combustion air flowing through the air supply duct 60 for the second time, the combustion air can be warmed with the combustion gas. Here, the combustion gas whose amount of heat has been reduced by the first heat exchange does not overheat the combustion air in the second heat exchange, and generates NOx during combustion due to the overheating of the combustion air. Can be suppressed. Further, the waste heat of the combustion gas can be effectively used, and the thermal efficiency can be improved.

  The combustion gas after flowing through the supply air heater 50 and performing the second heat exchange flows through the horizontal exhaust passage portion 85 and the upward exhaust passage portion 86 and is discharged.

Next, the first position adjusting member 82 and the second position adjusting member 833 of this embodiment will be described.
FIG. 4 is an enlarged view of the first position adjustment member 82 of the boiler 1 according to the above embodiment, and the connection portion of the first position adjustment member 82 with the feed water heat exchange part 81 and the connection path 83 (feed water heater side connection path 831). It is sectional drawing.

  As shown in FIG. 4, the feed water heat exchange unit 81 is disposed inside the feed water heater 40 and is a main body unit 811 that performs heat exchange, and a secondary side end of the main body unit 811, and includes a feed water heater The heat exchange part side cylinder part 812 arrange | positioned on the upper surface of 40, and the flange part 813 formed in the opening part of the secondary side of the heat exchange part side cylinder part 812 are provided.

As shown in FIG. 4, the first position adjustment member 82 includes a sliding cylinder portion 821 whose upper end is slidable with respect to the outer peripheral surface of the connection path 83, and the other end side (lower side) of the sliding cylinder portion 821. And a flange portion 822 connected to the feed water heat exchanging portion 81.
In the first position adjusting member 82, the diameter of the inner periphery of the sliding cylinder portion 821 is slightly larger than the diameter of the outer periphery of the primary side end portion of the connection path 83 formed in a cylindrical shape. Therefore, the first position adjusting member 82 can slide in the height direction (D1 direction) with respect to the connection path 83. That is, the first position adjustment member 82 can be adjusted in the height direction (D1 direction).

  The heat exchange portion side cylinder portion 812 and the first position adjustment member 82 are fixed by screwing the flange portion 813 and the flange portion 822 with the screw member 90. The first position adjusting member 82 and the connection path 83 (feed water heater side connection path 831) are fixed by, for example, welding the sliding surfaces of the sliding tube portion 821 and the connection path 83.

  FIG. 5 is an enlarged cross-sectional view of the second position adjusting member 833 of the boiler 1 according to the above-described embodiment, and a connection portion of the second position adjusting member 833 with the feed water heater side connection path 831 and the supply air heater side connection path 832. It is.

  As shown in FIG. 5, the feed water heater side connection path 831 is formed with a flange portion 831 a at an end portion on the supply air heater side connection path 832 side.

As shown in FIG. 5, the second position adjustment member 833 includes a sliding cylinder portion 833 a slidable with respect to the inner peripheral surface of the feed water heater side connection path 831 at one end side on the feed water heater side connection path 831 side. And a flange portion 833b that is disposed on the other end side (supply air heater side connection path 832 side) of the sliding cylinder portion 833a and connected to the supply air heater side connection path 832.
The second position adjustment member 833 has an end portion on the secondary side (supply air heater side connection path 832 side) of the feed water heater side connection path 831 in which the diameter of the outer periphery of the sliding cylinder part 833a is formed in a cylindrical shape. It is slightly smaller than the inner circumference diameter. Therefore, the second position adjusting member 833 can slide in the horizontal direction (D2) with respect to the feed water heater side connection path 831. That is, the second position adjustment member 833 can adjust the position in the horizontal direction (D2).

As shown in FIG. 5, the supply air heater side connection path 832 is formed with a flange portion 832 c at the end on the supply water heater side connection path 831 side.
The feed water heater side connection path 831 and the supply air heater side connection path 832 are fixed by screwing the flange portion 831 a and the flange portion 832 c with a screw member 92. The second position adjusting member 833 and the feed water heater side connection path 831 are fixed by, for example, welding the sliding surfaces of the slide cylinder portion 833a and the supply air heater side connection path 832.

Next, the installation method of the boiler 1 of this embodiment is demonstrated.
When installing the boiler 1, first, the heavy body can 10, the blower 30, the feed water heater 40, and the feed air heater 50 are installed on the support 20.
Next, the can 10, the blower 30, the feed water heater 40, and the feed air heater 50 fixed to the support body 20 are connected by the feed air duct 60 and the exhaust pipe 80.

Next, an example of a method of connecting the feed water heat exchange unit 81 and the supply air heat exchange unit 84 by the exhaust pipe 80 will be described in more detail.
First, the supply air heater side connection path 832 is temporarily fixed to the supply air heater 50 with a screw member (not shown). By temporarily fixing the supply air heater side connection path 832 to the supply air heat exchange section 84 (supply air heater 50), the opening of the supply air heater side connection path 832 on the feed water heater side connection path 831 side The position in the height direction (D1 direction) is determined.

  Then, the 1st position adjustment member 82 is attached to the edge part by the side of the feed water heat exchange part 81 of the feed water heater side connection path 831. FIG. And the 1st position adjustment member 82 is slid with respect to the feed water heater side connection path 831, and the height direction (D1) of the opening part by the side of the supply air heater side connection path 832 of the feed water heater side connection path 831 The position in the direction) and the position in the height direction (D1 direction) of the opening on the feed water heater side connection path 831 side of the supply air heater side connection path 832 described above are adjusted. After adjusting the position in the height direction (D1 direction) of the opening on the supply air heater side connection path 832 side of the feed water heater side connection path 831, the feed water heater side connection path 831 and the first position adjustment member 82 are It is fixed by welding the sliding surface.

Then, the 2nd position adjustment member 833 is attached to the edge part by the side of the supply air heater side connection path 832 of the feed water heater side connection path 831 and the 1st position adjustment member 82 fixed by welding. Then, the feed water heater side connection path 831 and the first position adjustment member 82 to which the second position adjustment member 833 is attached, and the opening part of the second position adjustment member 833 on the supply air heater side connection path 832 side, The feed water heater side connection path 832 is adjusted to be coaxial with the opening on the feed water heater side connection path 831 side, and is screwed to the feed water heat exchange section 81.
At this time, by finely adjusting the position of the supply air heater side connection path 832 in the direction D3, the opening of the second position adjustment member 833 on the supply air heater side connection path 832 side becomes the supply air heater. It can also adjust more strictly so that it may be located on the same axis as the opening of the side connection path 832 on the feed water heater side connection path 831 side. After finely adjusting the supply air heater side connection path 832 in the direction D3, the supply air heater side connection path 832 is connected to the supply air heat exchange section 84 by tightening a screw member (not shown) used for temporary fixing. Secure to.

Subsequently, the second position adjusting member 833 is slid to adjust the position in the D2 direction, and the flange portion 833b of the second position adjusting member 833 and the flange portion 832c of the supply air heater side connection path 832 are brought into contact with each other. . The flange portion 833b and the flange portion 832c that are brought into contact with each other are screwed.
Finally, the second position adjusting member 833 and the supply air heater side connection path 832 are fixed by welding the sliding surfaces.

  The boiler 1 according to the first embodiment of the present invention described above has the following effects.

(1) When manufacturing or installing the feed water heat exchanging portion 81 and the supply air heat exchanging portion 84 constituting the boiler 1, errors may occur in the height direction, and connection may be difficult due to the duct. there were.
In the boiler 1 according to the embodiment of the present invention, a first connection between the feed water heat exchanging portion 81 and the cylindrical connection path 83 that connects the feed water heat exchanging portion 81 and the feed air heat exchanging portion 84 constituting the boiler 1 is performed. A one-position adjusting member 82 is interposed. The first position adjusting member 82 is slidable in the height direction (D1 direction) with respect to the connection path 83.
Thereby, it becomes possible to connect the connection path 83 and the feed water heat exchange part 81 without opening a clearance by sliding the first position adjusting member 82. Therefore, when connecting the feed water heat exchange part 81 and the feed air heat exchange part 84 which comprise the boiler 1, the shift | offset | difference of the height direction D1 and generation | occurrence | production of a clearance gap in the connection part of the feed water heat exchange part 81 and a duct are prevented. be able to.

(2) The feed water heater 40 and the feed air heater 50 are arranged on the side of the can body 10, and the connection path 83 connects the upper surface of the feed water heater 40 and the upper surface of the feed air heater 50.
Thereby, while having the said effect, the boiler 1 can be installed compactly.

(3) The connection path 83 is connected to the upper surface of the supply air heater 50 and is fixed to the supply air heater 50 so that the position can be adjusted in the horizontal direction (D2 direction).
Thereby, the connection path 83 and the feed water heat exchanging part 81 can be slightly adjusted in the horizontal direction and connected. Therefore, when connecting the feed water heat exchange part 81 and the supply air heat exchange part 84 which comprise the boiler 1, not only the height direction shift | offset | difference and clearance gap in the connection part of the feed water heat exchange part 81 and a duct but horizontal direction It is also possible to prevent the occurrence of gaps and gaps.

(4) In the boiler 1 according to the embodiment of the present invention, the feed water heater side connection path 831 and the supply air heater side connection path 832 are connected to the connection path 83 and the feed water heater side connection path 831 or the feed water is supplied. A second position adjusting member 833 that is slidable in the horizontal direction with respect to the air heater side connection path 832 is provided.
Thereby, the connection path 83 and the feed water heat exchanging part 81 can be adjusted and connected in the horizontal direction. Therefore, when connecting the feed water heat exchange part 81 and the supply air heat exchange part 84 which comprise the boiler 1, not only the height direction shift | offset | difference and clearance gap in the connection part of the feed water heat exchange part 81 and a duct but horizontal direction The occurrence of gaps and gaps can be more effectively prevented.

(5) In the boiler 1 according to the first embodiment of the present invention, the first position adjusting member 82 includes a sliding cylinder 821 whose one end is slidable with respect to the outer peripheral surface of the connection path 83, and a sliding cylinder. And a flange portion 822 that is disposed on the other end side of 821 and is connected to the feed water heat exchange portion 81.
Thereby, it is possible to easily prevent a deviation in the height direction and the occurrence of a gap in the connection portion between the feed water heat exchanging portion 81 and the duct by a member having a simple configuration.

Next, a second embodiment of the present invention will be described.
FIG. 6 is an enlarged cross-sectional view of the first position adjustment member 82A and the connection portion of the first position adjustment member 82A with the feed water heat exchange part 81A and the connection path 83A in the second embodiment of the present invention. Note that the second embodiment is the same as the first embodiment except for the configuration shown in FIG.

  As shown in FIG. 6, the feed water heat exchange part 81A is disposed inside the feed water heater 40A, and is a main body part 811A for performing heat exchange, and an end part on the secondary side of the main body part 811A. The heat exchange part side cylinder part 812A arrange | positioned on the upper surface of 40A, and the flange part 813A formed in the opening part of the secondary side of the heat exchange part side cylinder part 812A are provided.

As shown in FIG. 6, the first position adjusting member 82A includes a sliding cylinder 821A and a sliding cylinder 821A whose one end on the lower side is slidable with respect to the inner peripheral surface of the heat exchange side cylinder 812A. And a flange portion 822A connected to the connection path 83A.
In the first position adjusting member 82A, the diameter of the outer periphery of the sliding cylinder portion 821A is slightly smaller than the diameter of the inner periphery of the secondary side end portion of the heat exchange portion side cylinder portion 812A formed in a cylindrical shape. Accordingly, the first position adjustment member 82A can slide in the height direction with respect to the heat exchange portion side cylinder portion 812A. That is, the first position adjustment member 82A can be adjusted in the height direction.

The feed water heater side connection path 831A of the connection path 83A is disposed on the primary side of the feed water heater side connection path 831A, and includes a flange portion 834A connected to the first position adjustment member 82A.
The feed water heater side connection path 831A and the first position adjusting member 82A are fixed by screwing the flange portion 822A and the flange portion 834A with the screw member 90A. The first position adjustment member 82A and the feed water heat exchange part 81A are fixed by, for example, welding the sliding surfaces of the sliding cylinder part 821A and the heat exchange part side cylinder part 812A.

  According to 2nd Embodiment of this invention, there exist the following effects.

(6) In the second embodiment of the present invention, the first position adjustment member 82A has a sliding cylinder portion whose one end is slidable with respect to the inner peripheral surface of the heat exchange portion side cylinder portion 812A of the feed water heat exchange portion 81A. 821A and a flange portion 822A disposed on the other end side of the sliding cylinder portion 821A and connected to the connection path 83A.
Thereby, the 1st position adjustment member 82 becomes slidable in a height direction (D1 direction) with respect to the feed water heat exchange part 81, and the connection of the feed water heat exchange part 81 and a duct is easy with a member of simple structure. It is possible to prevent the deviation in the height direction and the occurrence of a gap in the portion.

The preferred embodiments of the boiler of the present invention have been described above. However, the present invention is not limited to the above-described embodiments, and can be modified as appropriate.
For example, in the above embodiment, the sliding cylinder portion 821 of the first position adjusting member 82 is slidable with respect to the outer peripheral surface of the connection path 83, but is slid with respect to the inner peripheral surface of the connection path 83. It may be possible.
Moreover, in the said embodiment, the sliding cylinder part 833a of the 2nd position adjustment member 833 is made slidable with respect to the internal peripheral surface of the feed water heater side connection path 831, and the flange part 833b and the flange part 832c are made. Although screwed, the second position adjustment member 833 is reversed in the D2 direction so that the sliding cylinder portion 833a is slidable with respect to the inner peripheral surface of the supply air heater side connection path 832 and the flange portion 833b The flange portion 831a may be screwed.

  In the second embodiment, the sliding cylinder part 821A of the first position adjusting member 82A is slidable with respect to the inner peripheral surface of the heat exchange part side cylinder part 812A. The portion 812A may be slidable with respect to the outer peripheral surface. When the sliding cylinder part 821A of the first position adjusting member 82A is slidable with respect to the outer peripheral surface of the heat exchange part side cylinder part 812A, the flange part 813A is not formed in the feed water heat exchange part 81A. .

DESCRIPTION OF SYMBOLS 1 ... Boiler 10 ... Can body 30 ... Blower 40, 40A ... Feed water heater 50 ... Supply air heater 60 ... Supply air duct (supply air path)
63 ... Second upward air supply passage 70 ... Water supply passage 80 ... Exhaust pipe (exhaust passage)
81, 81A ... Feed water heat exchange part 811, 811A ... Main body part 812, 812A ... Heat exchange part side cylinder part 82, 82A ... First position adjusting member 821, 821A ... Sliding cylinder part 822, 822A ... Flange part 83, 83A ... Connection path 831, 831A ... Feed water heater side connection path 832 ... Supply air heater side connection path 833 ... Second position adjusting member 84 ... Supply air heat exchange section

Claims (6)

A can that generates steam by burning fuel and heating feed water;
An air supply passage for supplying combustion air to the can body;
A water supply channel for supplying the water supply to the can body;
An exhaust path that is connected to the can body at the base end side and exhausts combustion gas generated by burning the fuel;
A water heater provided in the water supply path for heating the water supply;
A boiler provided with an air supply heater for heating the combustion air provided in the air supply path;
The exhaust path is
A part of the feed water heater, a feed water heat exchange unit that exchanges heat between the combustion gas and the feed water,
A part of the charge air heater, a charge air heat exchanging section for exchanging heat between the combustion gas and the combustion air;
A cylindrical connection path connecting the feed water heat exchange section and the supply air heat exchange section;
A boiler comprising a first position adjusting member that is disposed between the feed water heat exchange part and the connection path and is slidable in a height direction with respect to the feed water heat exchange part or the connection path. The water heater and the air heater are arranged on the side of the can body,
The boiler according to claim 1, wherein the connection path connects an upper surface of the feed water heater and an upper surface of the supply air heater.   The boiler according to claim 1, wherein the connection path is connected to an upper surface of the supply air heater and is fixed to the supply air heater so that the position thereof can be adjusted in a horizontal direction. The connection path is
A feed water heater side connection path disposed on the feed water heater side;
A supply air heater side connection path disposed on the supply air heater side;
A second slidable in the horizontal direction with respect to the feed water heater side connection path or the feed air heater side connection path, while connecting the feed water heater side connection path and the feed air heater side connection path The boiler according to any one of claims 1 to 3, further comprising a position adjusting member. The first position adjusting member is
A sliding cylindrical portion whose one end side is slidable with respect to the outer peripheral surface or the inner peripheral surface of the connection path;
The boiler in any one of Claim 1 to 4 provided with the flange part arrange | positioned at the other end side of the said sliding cylinder part, and connected to the said feed water heat exchange part. The feed water heat exchange part is
A main body for heat exchange;
A heat exchanging portion side cylinder portion disposed at an end portion on the secondary side of the main body portion,
The first position adjusting member is
A sliding cylindrical portion whose one end side is slidable with respect to the outer peripheral surface or the inner peripheral surface of the heat exchange portion side cylindrical portion;
The boiler in any one of Claim 1 to 4 provided with the flange part arrange | positioned at the other end side of the said sliding cylinder part, and connected to the said connection path.

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