JP2002031302A - Support structure for heat transfer pipe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a support apparatus for a heat transfer pipe for supporting a heat transfer pipe of a heat exchanger in a rear flue section in a boiler with the aid of a suspension fitment, in which erosion is prevented from occurring, using a simplified structure. SOLUTION: When a heat transfer pipe is supported with a pair of side plates, extending to the left and right sides in the vertical directions and a reception plate disposed below each heat transfer pipe, the reception plate is disposed, directed in the vertical directions in its plate width direction to support the heat transfer pipe from a lower portion at an end surface of the plate, whereby ash is prevented from depositing because of a narrow area and erosion is prevented from occurring. Furthermore, the plate width direction of the reception plate is disposed vertically, whereby the secondary moment of a vertical cross section is increased to improve the strength of the support structure.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat transfer tube supporting device for supporting a heat transfer tube of a heat exchanger with a hanging bracket or the like in a rear flue portion or the like in a boiler.

[0002]

2. Description of the Related Art An outline of a conventional structure for supporting a heat transfer tube in a heat exchanger disposed in a rear flue section of a boiler will be described with reference to FIGS.

FIG. 11 is an explanatory view showing an outline of a power plant boiler, FIG. 12 is an explanatory view showing a support structure of a heat exchanger tube of a heat exchanger installed in a rear flue section, (a) is a side view,
(B) is a front view, and (c) is an explanatory view extracting and showing a receiving plate portion corresponding to a part of (a) or (b).

In the power plant boiler shown in FIG. 11, a high-temperature combustion gas is generated in a burner section (01), and the generated high-temperature combustion gas is exchanged in a heat exchange section (02) in which various heat exchangers are arranged. And each heat exchanger generates steam by heat exchange with the combustion gas.

[0005] When coal is used as fuel, ash is mixed in the combustion gas, and the ash is mixed in the heat exchange section (02).
Erosion or wear (hereinafter collectively referred to as erosion) occurs due to collision with the heat exchanger. In particular, in the rear flue section (03), the flow velocity increases due to the influence of the corner section, and the frequency of erosion increases.

As schematically shown in FIG. 12, a bare tube (07) or a fin tube (08) extending in the horizontal direction and arranged in a plurality of stages in the vertical direction is a side plate (06) extending in the vertical direction. Each row is sandwiched from both sides, and the receiving plate (09) or the receiving plate (01)
0).

[0007] The structural portion combining the side plate (06), the bare tube (07), the fin tube (08), the receiving plate (010) for the bare tube (07), and the receiving plate (09) for the fin tube (08) is as follows. Connected and fixed to the upper and lower support lugs (04, 05).

[0008] These structures assembled in this manner are passed through a hole (012) provided in an upper support lug (04), which is called a hanging bracket, by passing a U-rod (not shown) or the like. It is attached to the header on the upstream side not shown.

As shown in FIG. 12 (a), a space between the adjacent side plates (06), which divide the bare tube (07) and the fin tube (08) into rows, is suitable in the vertical direction. A spacing piece (011) is interposed at an appropriate position to keep the horizontal spacing of each tube constant.

A projection (09a) is provided on the side end surface of the receiving plate (09) for supporting the fin tube (08) from below, and the receiving plate (09) is connected to the side plate (09). 06), the projection (09a) penetrates through the side plate (06) and is locked.
Easy positioning and assembly.

Incidentally, the convex portion (09) of the receiving plate (09) is provided.
Corresponding to a), a similar convex portion is provided on the receiving plate (010) for supporting the bare tube (07) from below, but since both are substantially the same, the description is omitted.

[0012]

However, in the case where the hanging fitting having the above-mentioned structure is used, the problem that erosion tends to concentrate near the hanging fitting becomes apparent.

[0013] This is because the ash deposited on the receiving plate (09, 010) may be caused by the disturbance of the flow of the combustion gas in the heat exchanger, or the deposited ash may be deposited at a repose angle (the ash is stably deposited). Angle that can be formed; if the ash deposition angle is steeper than this angle, the deposited ash will collapse) and collapse by accumulating more than that, and the fin (08a) of the fin tube (08) and the heat exchanger Probably because of collisions in various places.

The present invention is to provide a heat transfer tube supporting apparatus which solves the above-mentioned problems in the conventional heat transfer tube supporting structure such as a hanging metal fitting and has a simple structure to prevent the occurrence of erosion and the like. The task is to do so.

[0015]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and as a first means, it is installed in a boiler, extends in the horizontal direction and is arranged in a plurality of stages in the vertical direction. A heat transfer tube such as a fin tube or a bare tube, and a pair of side plates extending vertically on both left and right sides of each heat transfer tube, and attached to the same side plate and arranged below each of the heat transfer tubes, together with the side plates In the heat transfer tube support device including a plurality of receiving plates that support the heat transfer tubes, the receiving plate is arranged so that the width direction of the plate is directed up and down, and supports the heat transfer tubes from below at an end surface of the plate. An object of the present invention is to provide a supporting device for a heat transfer tube having the above structure.

That is, according to the first means, a pair of side plates extending vertically on both right and left sides of a heat transfer tube such as a fin tube or a bare tube and a receiving plate arranged below the heat transfer tube. When the heat transfer tubes are supported from below by the end face of the receiving plate, the area of the surface facing upward on the receiving plate is only the end face of the plate, and the very small area There is no room to accumulate, and it does not lead to the occurrence of erosion, and the adoption of such an end face support structure allows the vertical cross-sectional shape of the receiving plate to have a vertical dimension equivalent to the height of the vertical cross-sectional shape. The second moment of area in the vertical direction is increased as compared with the conventional example, so that the vertical strength of the support structure is increased and the support is stabilized.

According to a second aspect of the present invention, in the first aspect, the receiving plate is arranged so that the width direction of the receiving plate is directed up and down, and the heat transfer tube is supported from below by an end surface of the plate. In place of the above, the heat transfer tubes are arranged in an inverted C-shape symmetrical with respect to the vertical arrangement axis of the plurality of stages of heat transfer tubes, and are configured to support the heat transfer tubes by inclined surfaces extending obliquely downward from above. A support device for a heat tube is provided.

That is, according to the second means, the receiving plate supports the heat transfer tube on an inclined surface which is formed in an inverted C shape and extends obliquely from above to below, and ash is deposited on the inclined surface. Therefore, there is no danger of erosion, and the support structure can be stabilized for a long time.

According to a third aspect of the present invention, in the first aspect, in the first aspect, the receiving plate is disposed so as to face up and down in a width direction of the plate, and the heat transfer tube is supported from below by an end surface of the plate. Instead, the present invention provides a heat transfer tube support device in which a cross section in a direction perpendicular to the axis of the heat transfer tube is arranged in a triangular or trapezoidal shape, and the heat transfer tube is supported thereon.

That is, according to the third means, the receiving plate is formed in a suitable shape such as a solid shape or a shape obtained by extracting a lower portion, and the cross section in the direction perpendicular to the axis of the heat transfer tube is formed in a triangular shape or a trapezoidal shape. When viewed from the heat transfer tube supported above, there is no room for ash to accumulate on this support side, and it will fall, and there is no risk of erosion, stabilizing the support structure for a long time. It is intended to aim at.

According to a fourth aspect of the present invention, in the first aspect, in the first aspect, the receiving plate is arranged so that a width direction of the plate is directed up and down, and the end surface of the plate supports the heat transfer tube from below. Instead, a plate is arranged with the plane of the plate parallel to the axis of the heat transfer tube, and each heat transfer tube is supported from below by an upper surface thereof, and an ash inflow prevention plate extending downward from the receiving plate between the both side plates is provided. An object of the present invention is to provide a heat transfer tube support device provided along an end surface of the side plate.

That is, according to the fourth means, the ash inflow prevention plate extending between the both side plates and extending downward from the same plate is provided along the end face of the side plate on the receiving plate supporting the heat transfer tube. As a result, ash that enters from between the side plates toward the heat transfer tube below the ash inflow prevention plate is prevented, and ash accumulation on the receiving plate is suppressed, greatly increasing the possibility of erosion. To stabilize the support structure for a long period of time.

According to a fifth aspect of the present invention, as the fifth means, in the first means, the receiving plate is arranged vertically in a plate width direction and the heat transfer tube is supported from below by an end surface of the plate. Instead, the present invention provides a heat transfer tube support device which is formed of a U-shaped receiving plate which extends from one side plate and winds around the heat transfer tube to support the heat transfer tube and reaches the same side plate.

In other words, according to the fifth means, the receiving plate is formed in a U-shape, comes out of one side plate, winds the peripheral surface of the heat transfer tube, and reaches the one side plate again. ,
The heat transfer tube is covered with the U-shaped receiving plate to prevent intrusion of ash, prevent erosion, and stabilize the support structure for a long time.

Furthermore, the present invention provides, as a sixth means, in the first means, wherein the receiving plate is arranged vertically in the width direction of the plate and supports the heat transfer tube from below at the end face of the plate. Alternatively, the plane of the plate is arranged in parallel with the axis of the heat transfer tube, and the upper surface thereof is formed of a flat plate that supports each heat transfer tube from below, and an inclined surface that opposes the flow from upstream above the side plate. And a heat transfer tube support device provided with a kicker for deflecting the flow on the inclined surface.

That is, according to the sixth means, in addition to supporting the heat transfer tube by the receiving plate, a kicker having an inclined surface against the flow from the upstream is provided above the side plate, and the inclined surface is provided. In this way, the flow of combustion gas and the like is deflected to prevent and suppress the accumulation of ash on the receiving plate, greatly reducing the possibility of erosion and stabilizing the support structure for a long time. It is intended to aim at.

[0027]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described with reference to FIGS. FIGS. 1A and 1B show a main part of a basic main example of a heat transfer tube support device according to the present embodiment, wherein FIG. 1A is a front view, FIG. 1B is a side view, and FIG. 2 shows an application example in which FIG. 1 is partially modified,
(A) is a front view, (b) is a side view, (c) is a plan view, and FIG. 3 shows another application example in which FIG. 1 is partially modified.
Is a front view, (b) is a side view, and (c) is a plan view.

That is, in this embodiment, (1)
Is a fin tube, which is provided with a fin (2) spirally mounted on the outer peripheral surface thereof and is disposed so as to extend in the horizontal direction. Are located.

(3) The side plates are arranged on the left and right sides of the fin tube (1) as a pair and extend vertically, and the fin tube (1) shown in the figure and other fin tubes (not shown) and the like are omitted from the side. It is arranged to sandwich and support.

(4) is a receiving plate having a planar shape and a height:
h, width: b, and plate thickness: t, and are formed by providing a protrusion (4a) at the center in the width direction on both sides in the length direction, and are clearly shown in FIG. 1 (b). The left and right projections (4a) are inserted and locked in the left and right side plates (3) so as to support the fin tube (1) from below.

The arrangement of the receiving plate (4) will be described in more detail. As clearly shown in FIG. 1 (c), the height of the plate extends in the up-down direction and the end face of the plate, that is, the plate thickness portion Since the fin tube (1) is supported by the fin tube (1), the cross-sectional area supporting the fin tube (1) is
That is, it is smaller than the cross-sectional area in the height direction.

The longitudinal direction of the plate intersects obliquely with respect to the central axis of the fin tube (1) in a plane projection, and
The fin tubes (1) are arranged so as to intersect in a direction opposite to the inclination of the fins (2).

Although a fin tube (1) is described as an example of a heat transfer tube of a boiler or the like here, a bare tube is also used as a heat transfer tube, and in this case, a receiving plate (4) is provided on the outer periphery of the bare tube. The surface is directly supported from below, and there is substantially no difference in the arrangement of the receiving plate (4) and the like.

As described above, according to the present embodiment, by reducing the cross-sectional area where the receiving plate (4) supports the fin tubes (1), it is possible to reduce the area where ash may accumulate. As a result, the amount of ash deposited can be reduced to prevent erosion.

The height of the receiving plate (4) is larger than that of the prior art, and the second moment of area (I = bh) in the vertical direction is increased.
^3/12, where b: width, h: the height) increases, vertical strength to support the fin-tube (1) is increased.

When the fin tube (1) is supported, the hanging plate is assembled by disposing the receiving plate (4) so as to intersect the fin (2) of the fin tube (1) in a direction opposite to the inclination. In this case, there is an advantage that the position of the fin tube (1) can be easily adjusted without the fins (2) of the fin tube (1) being caught on the receiving plate (4).

FIG. 2 shows an application example in which the one shown in FIG. 1 is partially modified. Here, a receiving plate which is supported from below the fin tube (1) is H-shaped in plan projection. This is an example in which is adopted.

That is, an H-shape is obtained by combining a receiving plate (4) corresponding to a horizontal line connecting the center of an H-shape and two receiving plates (5) corresponding to two vertical lines parallel to the left and right of the H-shape. The receiving plate (4) is made parallel to the axis of the fin tube (1), and the receiving plate (5) is provided with a convex portion (5a) so as to be inserted and locked to the side plate 3.

The receiving plate (4) thus formed into an H shape,
By supporting the fin tube (1) from below by (5), the strength of the receiving plate is further increased, and the receiving plate (5) extends in a direction perpendicular to the fin tube (1), so The inflow of the ash toward the fin tube (1) is prevented, and the ash hardly accumulates, which is effective in preventing the occurrence of erosion.

FIG. 3 shows another application example in which FIG. 1 is partially modified. Here, the shape of a receiving plate (4) supported from below the fin tube (1) is formed at both ends of a rectangular cross section. The shape is such that the L-shape and inverted L-shape are bent in different directions.

Although the specific shape is different from that of the H-shape, the operation and effect are substantially the same, the strength of the receiving plate is further increased, and the L-shaped bent portion is formed in a direction perpendicular to the fin tube (1). , The inflow of ash toward the lower fin tube (1) is prevented,
Ash is less likely to accumulate, which is effective in preventing erosion.

Next, a second embodiment of the present invention will be described with reference to FIG. 4A and 4B show a main part of a basic example of a heat transfer tube supporting device according to the present embodiment, wherein FIG. 4A is a front view, FIG. 4B is a side view, and FIG. 4C is a plan view.

In order to avoid redundant description, the same parts as those in the first embodiment will be denoted by the same reference numerals in the drawings, and redundant description will be omitted as much as possible in this embodiment. We will focus on specific points.

In the present embodiment, the receiving plate (4) is composed of a pair of fin tubes (1) as heat transfer tubes arranged in an inverted C-shape symmetrical with respect to the vertical center of the fin tube (1). The fin tube (1) is configured to be supported by an inclined surface extending obliquely downward from above each receiving plate (4).

Each of the left and right receiving plates (4) has a rib (6) at the center in the longitudinal direction.
A convex portion (6a) is formed on the outer end surface of the
Are inserted and locked in the side plate 3.

In the present embodiment, as described above, the two receiving plates (4) are arranged in an inverted C-shape in the vertical direction so that the projected area of the receiving plate (4) when viewed in a plan view is obtained. Is reduced, and even if ash flows in, the surface of the inclined receiving plate (4) slides down, so that ash does not accumulate, which is effective in preventing erosion.

Next, a third embodiment of the present invention will be described with reference to FIGS. FIG. 5 shows a main part of a basic main example of a heat transfer tube support device according to the present embodiment,
(A) is a front view, (b) is a side view, FIG. 6 shows an application example in which FIG. 5 is partially modified, (a) is a front view, (b) is a side view, and FIG. 7 is a view. FIGS. 5A and 5B show another application example in which FIG. 5 is partially modified, wherein FIG. 5A is a front view and FIG.

As in the case of the second embodiment, the same parts as those in the first and second embodiments are designated by the same reference numerals in the drawings so that the description will not be redundant. The overlapping description will be omitted as much as possible, and the description will focus on features unique to the present embodiment.

In the present embodiment, the receiving plate (4) is formed of a solid surface having a triangular cross section in the direction perpendicular to the axis of the fin tube (1) as a heat transfer tube, and the fin tube (1) is a side plate. It is supported from the side by (3) and from the lower surface in the direction perpendicular to the axis by the triangular receiving plate (4).

Therefore, according to the present embodiment, in addition to the strength being obtained from the shape, the surface of the receiving plate (4) is inclined even if ash flows, so that the ash Is effective to prevent erosion by slipping off the surface and preventing deposition.

In the application example shown in FIG. 6, the shape of the receiving plate (4) is changed from the triangular solid body shown in FIG. 5 to a trapezoidal solid body. Another application example is that a plate is bent to form a trapezoidal surface. Although there is a slight difference in shape between each of them, the strength is as strong as the receiving plate (4) in FIG. In addition, ash deposition is prevented, which is effective in preventing erosion.

Next, a fourth embodiment of the present invention will be described with reference to FIG. 8A and 8B show a main part of a basic main example of a heat transfer tube support device according to the present embodiment, wherein FIG. 8A is a front view, FIG. 8B is a side view, and FIG. 8C is a plan view.

As in the case of the second and third embodiments, the same parts as those in the first to third embodiments are designated by the same reference numerals in the drawings so that the description will not be redundant. In addition, the description will not be repeated as much as possible, and the description will focus on features unique to the present embodiment.

In the present embodiment, the receiving plate (4) is arranged below the fin tube (1), which is a heat transfer tube, parallel to the axis of the fin tube (1). It is supported from below.

Further, in addition to this, the receiving plate (4) has an ash inflow prevention plate (7) extending downward from the receiving plate (4) at the longitudinal end between the left and right side plates (3). ) Is provided along the end surface of the side plate (3).

Therefore, according to the present embodiment, the presence of the ash inflow prevention plate (7) prevents the inflow of ash toward the lower fin tube (1) in which the ash inflow prevention plate (7) is installed. Thus, the amount of deposited ash is reduced, which is effective in preventing erosion.

Although the ash inflow prevention plate (7) has been described as being installed at one end face of the side plate (3) here,
It is a matter of course that the ash inflow prevention plate (7) is not limited to one but may be installed on both end faces.

Next, a fifth embodiment of the present invention will be described with reference to FIG. 9A and 9B show a main part of a basic example of a heat transfer tube supporting device according to the present embodiment, wherein FIG. 9A is a front view, FIG. 9B is a side view, and FIG. 9C is a plan view.

As in the second to fourth embodiments, the same parts as those in the first to fourth embodiments are denoted by the same reference numerals in the drawings so that the description will not be redundant. In addition, the description will not be repeated as much as possible, and the description will focus on features unique to the present embodiment.

In the present embodiment, the receiving plate (4) is a U-shaped plate or a plate whose upper part is bent at an angle.
The receiving plate (4) is extended from one of the side plates (3) and wound around the peripheral surface of the fin tube (1) to support the same, returning to the one of the side plates (3) that has left. The fin tube (1) is sandwiched and fixed to the side plate (3).

Therefore, in this embodiment, the fin tube (1) is disposed between the left and right side plates (3) and completely covered by the U-shaped receiving plate (4). ) Can be prevented from flowing into the surrounding area, and in particular, since the upper part of the U-shape or the U-shape is inclined and bent, ash hardly accumulates on the receiving plate, which is extremely effective in preventing erosion. Become.

As can be easily understood from the display shown in FIG. 9B and the like, the fin tube (1) is fixed from the side by fixing the fin tube (1) with the U-shaped receiving plate (4). Only one of the supporting side plates (3) is sufficient, and the other side plate (3) can be eliminated.

Further, a sixth embodiment of the present invention will be described with reference to FIG. FIG. 10 shows a main part of a basic main example of a heat transfer tube support device according to the present embodiment,
(A) is a front view, (b) is a side view.

As in the second to fifth embodiments, the same parts as those in the first to fifth embodiments are designated by the same reference numerals in the drawings so that the description is not redundant. In addition, the description will not be repeated as much as possible, and the description will focus on features unique to the present embodiment.

In this embodiment, the fin tube (1) is sandwiched between the two side plates (3), and the receiving plate is arranged with the plane of the plate parallel to the axis of the fin tube (1). It is supported in the vertical direction by (4).

A support lug (8) is connected to the top of the side plate (3), and the plate-like kicker (9) is connected to the support lug (8) via a rib (10). Is attached.

As described above, according to the present embodiment, by attaching the kicker (6) to the support lug (5), the flow (11) of the high-temperature gas from the upstream side is deflected in a direction away from the hanging bracket. I do.

The ash also moves in the direction away from the hanging metal fittings along with the flow, so that less ash flows into the hanging metal fittings, and the accumulation of ash on the receiving plate is reduced to prevent erosion. It is extremely effective.

In the first to fifth embodiments, the fin tube (1) has been described as a typical example of the heat transfer tube of the boiler. However, as shown in FIG. Another example of a heat tube is a bare tube (1a), which in each embodiment is supported by a respective receiving plate (4) substantially in the same manner as the fin tube (1). Prevent ash accumulation,
It is possible to take advantage of the effect of avoiding the occurrence of erosion.

Although the present invention has been described with reference to the illustrated embodiments, the present invention is not limited to such embodiments.
It goes without saying that various changes may be made to the specific structure within the scope of the present invention.

[0071]

As described above, according to the invention of claim 1 of the present application, a heat transfer tube such as a fin tube or a bare tube installed in a boiler, extending in the horizontal direction and arranged in a plurality of stages in the vertical direction is provided. A pair of side plates extending up and down on both left and right sides of each heat transfer tube, and a plurality of receiving plates attached to the side plate and arranged below the heat transfer tubes, and supporting the heat transfer tubes together with the side plates. In the heat transfer tube support device, the heat transfer tube support device is configured such that the receiving plate is disposed with the plate width direction facing up and down and the heat transfer tube is supported from below by the end surface of the plate. When the heat transfer tube is supported by a receiving plate or the like, by supporting the heat transfer tube from below at the end face of the receiving plate, the area of the surface facing upward on the receiving plate is only the end face of the plate and is very narrow. Erosion can not afford to deposit ash in the area The vertical cross-sectional shape of the receiving plate is larger than that of the conventional example in the vertical cross-sectional shape of the receiving plate corresponding to the height of the vertical cross-sectional shape by adopting such an end surface supporting structure. Therefore, the second moment of area in the vertical direction is increased, the vertical strength of the support structure is increased, the support is stabilized, and a suitable heat transfer tube support device can be obtained.

According to a second aspect of the present invention, in the first aspect of the present invention, the receiving plate is arranged so that the width direction of the plate is directed up and down, and the heat transfer tube is disposed at the end face of the plate from below. Instead of supporting the heat transfer tubes, the heat transfer tubes are arranged in an inverted C-shape symmetrical with respect to the vertical arrangement axis of the plurality of stages of heat transfer tubes, and the heat transfer tubes are supported on an inclined surface extending obliquely downward from above. Since the supporting device of the heat transfer tube is configured as above, the receiving plate has an inverted U-shape and supports the heat transfer tube on an inclined surface extending obliquely from above to below, and ash does not accumulate on the inclined surface. There is no danger of erosion due to dropping, and it is possible to obtain a suitable heat transfer tube support device that realizes long-term stabilization of the support structure.

According to a third aspect of the present invention, in the first aspect of the present invention, the receiving plate is disposed so as to face up and down in the width direction of the plate, and the heat transfer tube is disposed at the end face of the plate from below. Instead of supporting, the heat transfer tube support section of the heat transfer tube is configured such that the cross section in the direction perpendicular to the axis is arranged as a triangle or a trapezoid, and the heat transfer tube is supported thereon.
Since the receiving plate has a triangular or trapezoidal cross section in the direction perpendicular to the axis of the heat transfer tube, there is no room for ash to accumulate on the support side when viewed from the heat transfer tube supported thereon, and the receiving plate falls. As a result, a suitable heat transfer tube support device that realizes long-term stabilization of the support structure without fear of erosion can be obtained.

According to a fourth aspect of the present invention, in the first aspect of the present invention, the receiving plate is arranged so that the width direction of the plate is directed up and down, and the heat transfer tube is disposed at the end face of the plate from below. Instead of supporting the ash inflow, the plane of the plate is arranged parallel to the axis of the heat transfer tube, the upper surface thereof supports each heat transfer tube from below, and extends downward from the receiving plate across the both side plates. Since the prevention plate is provided along the end face of the side plate to constitute the heat transfer tube support device, the ash inflow prevention plate extending downward from the reception plate across the both side plates is provided on the receiving plate supporting the heat transfer tube. By being provided along the end face of the side plate, ash entering from between the side plates toward the heat transfer tube below the ash inflow prevention plate is prevented, and ash accumulation on the receiving plate is suppressed, The potential for erosion has been greatly reduced It is intended that could obtain a supporting device of the preferred heat transfer tube to achieve a stabilization prolonged support structure.

According to a fifth aspect of the present invention, in the first aspect of the present invention, the receiving plate is arranged so as to face up and down in a width direction of the plate, and the heat transfer tube is disposed at an end face of the plate from below. Instead of supporting it, the peripheral surface of the heat transfer tube was rolled out from one side plate to support the same, and the heat transfer tube support device was configured as a U-shaped receiving plate reaching the same side plate. The heat transfer tube is covered by a U-shaped receiving plate that comes out of the side plate and winds around the heat transfer tube and reaches again to one side plate to prevent ash intrusion, prevent erosion and prevent long-term support structure. Thus, it is possible to obtain a suitable heat transfer tube support device that realizes the above-mentioned stabilization.

According to a sixth aspect of the present invention, in the first aspect of the present invention, the receiving plate is arranged so that the width direction of the plate is directed up and down, and the heat transfer tube is positioned downward at the end face of the plate. Instead of being supported from above, the plate is arranged with the plane parallel to the axis of the heat transfer tube, and is formed by a flat plate that supports each heat transfer tube from below on its upper surface, and opposes the flow from upstream above the side plate. Since the heat transfer tube supporting device is configured by providing a kicker for deflecting the flow on the inclined surface, a kicker having an inclined surface against the flow from upstream is provided above the side plate, and By making the flow of combustion gas etc. deviate on the inclined surface, ash is prevented and suppressed from accumulating on the receiving plate, the possibility of erosion is greatly reduced, and the support structure extends over a long period of time A suitable heat transfer tube support device that realizes stabilization In which Rukoto was able.

[Brief description of the drawings]

FIG. 1 shows a main part of a basic main example of a heat transfer tube support device according to a first embodiment of the present invention, (a) is a front view,
(B) is a side view, and (c) is a plan view.

2A and 2B show an application example in which FIG. 1 is partially modified, wherein FIG. 2A is a front view, FIG. 2B is a side view, and FIG. 2C is a plan view.

FIG. 3 shows another application example in which FIG. 1 is partially modified, and (a)
Is a front view, (b) is a side view, and (c) is a plan view.

FIGS. 4A and 4B show a main part of a basic principal example of a heat transfer tube support device according to a second embodiment of the present invention, FIG.
(B) is a side view, and (c) is a plan view.

5A and 5B show a main part of a basic main example of a heat transfer tube support device according to a third embodiment of the present invention, FIG.
(B) is a side view.

6A and 6B show an application example in which FIG. 5 is partially modified, wherein FIG. 6A is a front view and FIG. 6B is a side view.

7A and 7B show another application example in which FIG. 5 is partially modified, and FIG.
Is a front view, and (b) is a side view.

FIGS. 8A and 8B show a main part of a basic main example of a heat transfer tube support device according to a fourth embodiment of the present invention, FIG.
(B) is a side view, and (c) is a plan view.

FIG. 9 shows a main part of a basic main example of a heat transfer tube support device according to a fifth embodiment of the present invention, where (a) is a front view,
(B) is a side view, and (c) is a plan view.

FIGS. 10A and 10B show a main part of a basic main example of a heat transfer tube support device according to a sixth embodiment of the present invention, FIG.
(B) is a side view.

FIG. 11 is an explanatory diagram showing an outline of a conventional power plant boiler.

FIG. 12 is an explanatory view showing a support structure of a heat exchanger tube of a heat exchanger installed in a rear flue section in a conventional power plant boiler, where (a) is a side view, (b) is a front view, and (b) is a front view. c)
FIG. 4 is an explanatory diagram showing an excerpt of a receiving plate portion corresponding to a part of (a) or (b).

[Explanation of symbols]

 (01) Burner part (02) Heat exchange part (03) Rear flue part (04, 05) Support lug (06) Side plate (07) Bear tube (08) Fin tube (08a) Fin (09, 010) Receiving plate (09a) Convex part (011) Spacing piece (012) Hole (1) Fin tube (1a) Bear tube (2) Fin (3) Side plate (4) Receiving plate (4a) Convex part (5) Receiving plate (5a) Convex part (6) Rib (6a) Convex part (7) Ash inflow prevention plate (8) Support lug (9) Kicker (10) Rib (11) Flow

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Akihito Yoshida 1-1, Akunouracho, Nagasaki-shi Inside Nagasaki Shipyard, Mitsubishi Heavy Industries, Ltd. (72) Inventor Keiji Suga 5-7-17-1 Fukahoricho, Nagasaki-shi Mitsubishi Heavy Industries Nagasaki Laboratory Co., Ltd.

Claims (6)

[Claims] 1. A heat transfer tube, such as a fin tube or a bare tube, which is installed in a boiler and extends in a horizontal direction and is arranged in a plurality of stages in a vertical direction, and is arranged to extend vertically on both left and right sides of each heat transfer tube. In a heat transfer tube support device comprising a pair of side plates and a plurality of receiving plates attached to the side plates and arranged below the heat transfer tubes and supporting the heat transfer tubes together with the side plates, the receiving plate includes a plate. A heat-transfer-tube supporting device, wherein the heat-transfer tube is supported from below by an end face of a plate, the heat-transfer tube being supported vertically from above and below. 2. The receiving plate is arranged so that the width direction of the plate is directed up and down, and instead of supporting the heat transfer tube from below at an end face of the plate, the receiving plate is centered on a vertical arrangement axis of the plurality of stages of heat transfer tubes. 2. The heat transfer tube support device according to claim 1, wherein the heat transfer tube support device is configured to support the heat transfer tube by an inclined surface that is arranged in a symmetrical inverted C shape and that extends obliquely from above to below. 3. 3. The receiving plate is arranged so that the width direction of the plate is directed up and down, and instead of supporting the heat transfer tube from below at an end surface of the plate, a cross section of the heat transfer tube in a direction perpendicular to the axis is triangular or base. 2. The heat transfer tube support device according to claim 1, wherein the heat transfer tube support device is arranged in a shape and configured to support the heat transfer tube thereon. 4. The receiving plate is arranged so that the width direction of the plate is directed up and down, and instead of supporting the heat transfer tube from below at an end surface of the plate, the flat surface of the plate is made parallel to the axis of the heat transfer tube. It is arranged, and while supporting each heat transfer tube from below on its upper surface,
2. The heat transfer tube support device according to claim 1, wherein an ash inflow prevention plate extending downward from the receiving plate between the both side plates is provided along an end surface of the side plate. 3. 5. The receiving plate is arranged so that the width direction of the plate is directed up and down, and instead of supporting the heat transfer tube from below at an end surface of the plate, the receiving plate comes out of one side plate and forms a peripheral surface of the heat transfer tube. The heat transfer tube support device according to claim 1, wherein the heat transfer tube support device is formed of a U-shaped receiving plate that is wound around and supports the same and reaches the same side plate. 6. The receiving plate is arranged so that the width direction of the plate is directed up and down, and instead of supporting the heat transfer tube from below at an end surface of the plate, the flat surface of the plate is made parallel to the axis of the heat transfer tube. The heat transfer tubes are arranged on the upper surface thereof, and each heat transfer tube is formed of a flat plate that supports the flow from below. The support device for a heat transfer tube according to claim 1, wherein: