JP6996973B2 - A partition wall penetrating structure of the reaction vessel and a boiler having this structure - Google Patents

Description

The present disclosure relates to a partition wall penetrating structure of a reaction vessel and a boiler having the structure.

Conventionally, there is known a structure for penetrating a partition wall of a pipe provided so as to penetrate the partition wall of the reaction vessel and communicate the inside and the outside of the reaction vessel. For example, Patent Document 1 discloses a structure for increasing the expansion / contraction amount of an expansion / contraction member (so-called expansion) that absorbs heat shrinkage of a pipe at a furnace wall penetrating portion of a heat transfer tube in a boiler.

Japanese Unexamined Patent Publication No. 2000-329307

However, in the structure described in Patent Document 1, exhaust gas flows into the gap between the expansion / contraction portion (so-called bellows) of the expansion / contraction member and the pipe extending inside the expansion / contraction member, and the exhaust gas staying in this gap is the acid dew point. There is a problem that the piping may be corroded when the temperature drops below the temperature.

In view of the above circumstances, at least one embodiment of the present invention aims to suppress corrosion of pipes in a partition wall penetrating portion.

(1) The partition wall penetrating structure of the reaction vessel according to at least one embodiment of the present invention is
A partition wall that separates the inside and the outside of the reaction vessel,
At least one pipe that penetrates the partition wall and communicates between the inside and the outside of the reaction vessel.
A sealing device provided on the outside of the reaction vessel.
A first seal member, which is airtightly connected to the outer peripheral surface of the pipe over the entire circumference in the circumferential direction of the pipe.
A second seal member airtightly connected to an outer surface of the partition wall or an outer surface forming member provided on the outer surface of the partition wall over the entire circumference in the circumferential direction of the pipe, outside the outer peripheral surface of the pipe. One end is an elastic member that is airtightly connected to the first seal member, and the other end that is arranged on the opposite side of the one end to the partition wall is airtightly connected to the second seal member. A sealing device that includes a telescopic member, which is formed to absorb the contraction of the pipe in the pipe axis direction.
It is equipped with.
Generally, at the penetration portion where the pipe penetrates the partition wall of the reaction vessel, an elastic member for absorbing the dimensional difference of the pipe due to heat shrinkage and sealing the gas flowing out from the reaction vessel through the gap between the pipe and the partition wall. Is provided so as to cover the outer periphery of the pipe. Gas tends to stay in the gap between the telescopic member and the pipe, and the temperature on the outside of the reaction vessel becomes lower as the distance from the partition wall increases. Therefore, in the case of a structure in which corrosive gas that may be contained before and after the reaction in the reaction vessel flows into the gap between the pipe and the expansion / contraction member extending to the outside of the reaction vessel from the gap between the partition wall and the pipe, the gap. The temperature of the corrosive gas staying in the water may drop below the acid dew point temperature, which may cause corrosion.
In this respect, according to the configuration of (1) above, the first seal member is airtightly connected to the outer peripheral surface of the pipe over the entire circumference of the pipe, and extends over the entire circumference of the pipe outside the outer peripheral surface of the pipe. The second seal member is airtightly connected to the outer surface or the outer surface forming member of the partition wall, and one end of the telescopic member is airtightly connected to the first seal member and the other end is arranged opposite to the partition wall from the one end. Is airtightly connected to the second seal member. Therefore, on the outside of the reaction vessel, the corrosive gas does not flow between the pipe and the expansion / contraction member, and the corrosive gas does not come into contact with the pipe. Therefore, it is possible to effectively suppress the corrosion of the pipe on the outside of the reaction vessel at the partition wall penetrating portion.

(2) In some embodiments, in the configuration described in (1) above,
The first sealing member includes a first flange portion having a first sealing surface extending along the radial direction of the pipe.
According to the configuration of (2) above, the first flange portion extends along the radial direction of the pipe, so that the airtightness between the first seal member and one end of the expansion / contraction member is maintained through the first flange portion. The secured connection can be easily made. As a result, it is possible to effectively prevent the inflow of gas into the gap between the pipe and the expansion / contraction member on the outside of the reaction vessel, so that the corrosion of the pipe on the outside of the reaction vessel at the partition wall penetrating portion is more effectively prevented. Can be prevented.

(3) In some embodiments, in the configuration described in (2) above,
The first seal member is
Including an annular ring portion airtightly connected to the outer peripheral surface of the pipe.
The first flange portion is welded to the outer peripheral surface of the ring portion.
According to the configuration of (3) above, in the first seal member, the first flange portion is welded to the outer peripheral surface of the annular ring portion airtightly connected to the outer peripheral surface of the pipe, so that the first flange portion is welded to the entire circumferential direction of the pipe. It is airtightly connected to the outer peripheral surface of the pipe over the circumference. Therefore, for example, when the first flange portion is welded (on-site welding) at the site and attached, the pipe is connected during welding and operation as compared with the case where the first flange portion is directly welded to the outer peripheral surface of the pipe. The possibility of damaging the outer peripheral surface can be effectively reduced.

(4) In some embodiments, in the configuration described in any one of (1) to (3) above,
The second seal member is
A pipe shaft extending portion extending along the pipe axis direction of the pipe, one end of which is airtightly connected to the outer surface of the partition wall or the outer surface forming member.
A second flange portion extending from the other end of the pipe shaft extending portion toward the pipe along the radial direction of the pipe is included.
According to the configuration of (4) above, the second seal member is airtightly connected to the outer surface or the outer surface forming member of the partition wall at one end of the pipe shaft extending portion, and the second flange portion at the other end of the pipe shaft extending portion. Is airtightly connected to the telescopic member. At that time, the second flange portion extends from the other end of the pipe shaft extending portion toward the pipe along the radial direction of the pipe, so that the connection between the second flange portion and the expansion / contraction member is ensured. Can be easily performed. As a result, for example, even when the gas in the reaction vessel flows into the pipe shaft extending portion from the gap between the pipe and the partition wall, the gas may flow into the gap between the expansion / contraction member and the pipe or the pipe shaft extends. It is possible to prevent the outflow to the outside of the portion and appropriately exert the sealing function.

(5) In some embodiments, in the configuration described in any one of (1) to (4) above,
The telescopic member
A bellows-shaped elastic part and
The flange portion on one end side provided on one end side of the telescopic portion and the flange portion on one end side.
The other end side flange portion provided on the other end side of the expansion / contraction portion is included.
According to the configuration of (5) above, since both one end and the other end of the expansion / contraction portion are flange portions, the connection between each of the first seal member and the second seal member and the expansion / contraction member is ensured. Can be easily and reliably performed. Further, since the elastic portion is formed in a bellows shape, it is possible to obtain an elastic member that can be easily deformed with expansion and contraction in the pipe axis direction.

(6) In some embodiments, in the configuration according to any one of (1) to (5) above,
The reaction vessel is a boiler,
The partition wall is the furnace wall of the boiler.
The pipe is a boiler pipe used for the boiler.
According to the configuration of (6) above, it is possible to appropriately prevent the corrosion of the pipe extending to the outside of the furnace at the furnace wall penetrating portion where the pipe penetrates the furnace wall of the boiler furnace.

According to some embodiments of the present invention, corrosion of pipes at the partition wall penetrating portion can be suppressed.

It is a schematic diagram which shows the structural example of the thermal power plant provided with the boiler which applied the partition wall penetration structure of the reaction vessel which concerns on one Embodiment. It is a schematic diagram which shows simply the partition wall penetration structure of the reaction vessel which concerns on one Embodiment. It is a schematic diagram which shows the structural example of the partition wall penetration structure of the reaction vessel which concerns on one Embodiment, (a) is a plan view, (b) is a vertical sectional view. It is a side cross-sectional view which shows the partition wall penetration structure of the reaction vessel in one Embodiment, and is the figure which shows the NN direction cross section in FIG. 3 (b). It is a front view which shows the comparative example of the partition wall penetration structure of a reaction vessel. It is a side cross-sectional view which shows the comparative example of the partition wall penetration structure of the reaction vessel, and is the figure which shows the DD cross section in FIG. It is a figure which shows the partition wall penetration structure of the reaction vessel which concerns on other embodiment.

Hereinafter, some embodiments of the present invention will be described with reference to the accompanying drawings. However, the dimensions, materials, shapes, relative arrangements, etc. of the components described as embodiments or shown in the drawings are not intended to limit the scope of the present invention to this, but are merely explanatory examples. do not have.
For example, expressions that represent relative or absolute arrangements such as "in one direction", "along a certain direction", "parallel", "orthogonal", "center", "concentric" or "coaxial" are exact. Not only does it represent such an arrangement, but it also represents a tolerance or a state of relative displacement at an angle or distance to the extent that the same function can be obtained.
For example, expressions such as "same", "equal", and "homogeneous" that indicate that things are in the same state not only represent exactly the same state, but also have tolerances or differences to the extent that the same function can be obtained. It shall also represent the existing state.
For example, the expression representing a shape such as a quadrangular shape or a cylindrical shape not only represents a shape such as a quadrangular shape or a cylindrical shape in a geometrically strict sense, but also an uneven portion or a chamfer within the range where the same effect can be obtained. It shall also represent the shape including the part and the like.
On the other hand, the expressions "equipped", "equipped", "equipped", "included", or "have" one component are not exclusive expressions excluding the existence of other components.

FIG. 1 is a schematic view showing a configuration example of a thermal power plant provided with a boiler to which the partition wall penetrating structure of the reaction vessel according to the embodiment can be applied.
As illustrated in FIG. 1 without limitation, the thermal power generation plant 1 is driven by a boiler 2, a steam turbine 3 driven by steam generated by being heated by the heat generated by the boiler 2, and a steam turbine 3. A generator 4 that generates power by being generated, a condenser 5 that returns steam that has contributed to power generation and finished work to the liquid phase, a pump 6 that circulates the water liquefied by the condenser 5, and an exhaust from the boiler 2. It is equipped with a chimney 9 that discharges. The thermal power plant 1 may be provided with various configurations other than the above configurations, if necessary.

In the steam turbine 3, water as a heat medium is heated by the high-temperature gas from the boiler 2 through a heat exchanger 7 such as a furnace heat transfer tube, a coal saver, and a superheater, and the high-pressure steam (high-pressure ST) obtained thereby is heated. ), And a low-pressure turbine 3B that is rotated and driven by low-pressure steam (low-pressure ST) after rotating the high-pressure turbine 3A.

As illustrated in FIG. 1 without limitation, the boiler 2 includes a furnace 10A and a burner 20 that mixes and injects fuel 15 and air 16 into the furnace 10A.

The furnace 10A is a cylindrical hollow body for internally reacting the fuel 15 with the combustion air 16 for combustion, and may take various forms such as a cylindrical shape and a square columnar shape. In some embodiments, the furnace 10A may include a furnace wall portion 12A and a furnace bottom portion 14. The flue 10A is provided with a flue 8 on the downstream side in the flow direction A of the combustion gas, that is, on the upper side of the flue 10A. The flue 8 can be configured as a gas flow path for guiding the combustion gas produced in the furnace 10A.

The burner 20 is configured so that the fuel 15 and the air 16 can be mixed and supplied from outside the furnace 10A into the furnace 10A.
The air 16 is a medium for transporting the fuel 15 and for atomizing the fuel 15.
In some embodiments, the burner 20 is arranged on the upstream side in the flow direction A of the combustion gas in the furnace 10A (for example, in the case of the vertically elongated furnace 10A, the lower side of the furnace 10A). .. In some embodiments, a plurality of burners 20 may be provided, and each of the plurality of burners 20 may be installed at different positions in the combustion gas flow direction A in the furnace 10A. As described above, by providing the burner 20, it is possible to realize the boiler 2 that exhibits the effects described in any of the embodiments of the present disclosure.

Here, the partition wall penetrating structure of the reaction vessel according to at least one embodiment of the present disclosure will be described in detail.
FIG. 2 is a schematic view simply showing a partition wall penetrating structure of the reaction vessel according to the embodiment. 3A and 3B are schematic views showing a configuration example of a partition wall penetrating structure of a reaction vessel according to an embodiment, where FIG. 3A is a plan view and FIG. 3B is a vertical sectional view. FIG. 4 is a side sectional view showing a partition wall penetrating structure of the reaction vessel in one embodiment, and shows a sectional view in the NN direction in FIG. 3 (b).
As illustrated in FIGS. 2 to 4 without limitation, the partition wall penetrating structure of the reaction vessel according to at least one embodiment of the present invention includes a partition wall 12 for partitioning the inside and the outside of the reaction vessel 10 and a partition wall 12. At least one pipe 50 that penetrates the inside and the outside of the reaction vessel 10 and airtightly seals the gas in the reaction vessel 10 that flows out from the gap between the partition wall 12 and the pipe 50 on the outside of the reaction vessel 10. It is provided with a sealing device 30 for stopping.

Various vessels can be applied to the reaction vessel 10. For example, it may be a container in which combustion or other exothermic reactions are mainly performed. Further, the container may contain a corrosive gas, a harmful gas, or the like before or after the reaction performed inside. Specifically, various chemical plants, the above-mentioned thermal power generation plant 1, and reactors and combustion vessels (reactors) used in incineration facilities and the like can also be applied as the reaction vessel 10. The partition wall penetrating structure of the reaction vessel shown in some embodiments of the present disclosure can be suitably applied to the above-mentioned vessel.
The partition wall 12 of the reaction vessel 10 may be configured to ensure airtightness between the inside and the outside of the partition wall 12. In some embodiments, an outer surface forming member 13 is provided on the outside of the reaction vessel 10, and the partition wall penetrating structure of the reaction vessel of the present disclosure may be applied in relation to the outer surface forming member 13 and the pipe 50 (for example, FIG. 2 and FIG. 4). The outer surface forming member 13 may be, for example, an ECO hopper plate 13A (see FIG. 2) or a seal box 30A (see FIG. 7) that can be used in the furnace 10A. In another embodiment, the partition wall penetrating structure of the reaction vessel of the present disclosure may be applied in relation to the outer surface 12B of the partition wall 12 and the pipe 50.
The pipe 50 may be arranged so as to penetrate any portion of the reaction vessel 10. For example, it may be arranged so as to penetrate the side surface (for example, the furnace wall portion 12A), the bottom surface (for example, the furnace bottom portion 14), or the upper surface of the reaction vessel 10 (see FIG. 1).

The sealing device 30 is on the outside of the reaction vessel 10 so as to airtightly surround the outer surface forming member 13 provided on the outer surface 12B of the partition wall 12 or the outer surface 12B of the partition wall 12 at the penetration portion P and the outer peripheral surface 52 of the pipe 50. Can be placed in.
The sealing device 30 is formed from the first sealing member 31 that is airtightly connected to the outer peripheral surface 52 of the pipe 50 (for example, the welded portion W1) over the entire circumference of the pipe 50 in the circumferential direction, and the outer peripheral surface 52 of the pipe 50. On the outside, a second seal member 35 that is airtightly connected to the outer surface 12B of the partition wall 12 or the outer surface forming member 13 (for example, the welded portion W2) over the entire circumference of the pipe 50 in the circumferential direction, and one end 40 (for example, described later). The one end side flange portion 40A) is airtightly connected to the first seal member 31 (for example, the welded portion W3), and the other end 41 (for example, the other end described later) is arranged on the opposite side of the one end 40 to the partition wall 12. The side flange portion 41A) includes a telescopic member 38 to which the second seal member 35 is airtightly connected (for example, the welded portion W4).

The first seal member 31 may extend in an annular shape in a direction (including an orthogonal direction) intersecting the pipe axial direction X of the pipe 50. In some embodiments, the first seal member 31 may be a plate member erected on the outer peripheral surface 52 continuously on the outer peripheral surface 52 of the pipe 50. The first seal member 31 is connected to the end of the telescopic member 38 on the reaction vessel 10 side (that is, the proximal end of the telescopic member 38 when viewed from the reaction vessel 10). That is, the first seal member 31 is arranged between the expansion / contraction member 38 and the reaction vessel 10. In some embodiments, the first seal member 31 is with the outer surface 12B or the outer surface forming member 13 in the tube axial direction X so as to be as close as possible to the outer surface 12B or the outer surface forming member 13 of the partition wall 12 of the reaction vessel 10. It may be arranged so that the gap between the two is reduced.
The second seal member 35 may be formed in a cylindrical shape so as to surround the outer periphery of the first seal member 31 coaxially with the first seal member 31. In some embodiments, the second seal member 35 may be formed by joining a semi-cylindrical half-cracked member coaxially with the pipe axis direction X (for example, FIGS. 3A and 3). (B)). A predetermined distance may be provided between the second seal member 35 and the first seal member 31.
The telescopic member 38 is airtightly connected to the peripheral edge portion of the first seal member 31 over the entire circumference of the pipe 50. In some embodiments, one end 40 of the telescopic member 38 and the peripheral edge portion of the first seal member 31 may be airtightly welded by the welded portion W3. The other end 41 of the telescopic member 38 is airtightly connected to the second seal member 35 by the welded portion W4. In some embodiments, one end 40 of the telescopic member 38 and the peripheral edge portion of the first seal member 31 may be airtightly welded.
The expansion / contraction member 38 is also called expansion, and expands / contracts along the pipe axis direction X and the pipe axis vertical direction Y so as to absorb the contraction of the pipe 50 in the pipe axis direction X and the pipe axis vertical direction Y due to thermal expansion / contraction. It is formed as possible. In the example shown non-limitingly in the present disclosure, the second seal member 35 is fixed to the outer surface 12B or the outer surface forming member 13, and the distal end of the second seal member 35 as viewed from the reaction vessel 10 (in FIGS. 2 and 4). The other end 41 of the telescopic member 38 is fixed to the left end), and one end of the telescopic member 38 is fixed to the pipe 50 via the first seal member 31. Therefore, for example, when the pipe 50 is thermally stretched and stretched in the pipe axial direction X, a compressive force may be applied to the stretchable portion 39.
Then, in some embodiments, the space 70 formed by the first seal member 31, the second seal member 35, the telescopic member 38, the partition wall 12, and the pipe 50 is filled with a gap between the partition wall 12 and the pipe 50. The gas flowing out from the reaction vessel 10 may be inflowed.

Here, according to the partition wall penetrating structure (see FIGS. 5 and 6) shown as a comparative example, the piping due to heat shrinkage in the penetrating portion P through which the pipe 50 penetrates the partition wall 12 of the reaction vessel 10 (see, for example, FIG. 1). An expansion / contraction member 38 for absorbing the dimensional difference of the pipe 50 and sealing the gas flowing out of the reaction vessel 10 through the gap between the pipe 50 and the partition wall 12 is provided so as to cover the outer periphery of the pipe 50 (FIG. 5). And FIG. 6). Gas tends to stay in the gap between the telescopic member 38 and the pipe 50, and the temperature on the outside of the reaction vessel 10 becomes lower as the distance from the partition wall 12 increases. Therefore, corrosive gas that may be contained before and after the reaction in the reaction vessel 10 flows into the gap between the pipe 50 and the expansion / contraction member 38 extending from the gap between the partition wall 12 and the pipe 50 to the outside of the reaction vessel 10. In the case of the structure (see FIGS. 5 and 6), the temperature of the corrosive gas staying in the gap may drop below the acid dew point temperature, which may cause corrosion.
In this regard, according to the above configuration of the present disclosure, the first seal member 31 is airtightly connected to the outer peripheral surface 52 of the pipe 50 over the entire circumference of the pipe 50, and the pipe is located outside the outer peripheral surface 52 of the pipe 50. The second seal member 35 is airtightly connected to the outer surface 12B or the outer surface forming member 13 of the partition wall 12 over the entire circumference of the 50, and one end of the telescopic member 38 is airtightly connected to the first seal member 31. The other end, which is arranged opposite to the partition wall 12 from one end, is airtightly connected to the second seal member 35. Therefore, on the outside of the reaction vessel 10, the corrosive gas does not flow between the pipe 50 and the expansion / contraction member 38, and the corrosive gas does not come into contact with the pipe 50. Therefore, corrosion of the pipe 50 can be effectively suppressed outside the reaction vessel 10 at the penetration portion P of the partition wall 12.
In the space 70 in the sealing device 30 where the exhaust gas flowing out through the gap between the reaction vessel 10 and the pipe 50 may exist, the temperature near the reaction vessel 10 is close to the temperature inside the reaction vessel 10 and is relatively high. .. Therefore, among the corrosive gas that has flowed out, the gas that stays near the reaction vessel 10 is originally unlikely to drop below the acid dew point temperature, and it is assumed that the corrosive gas comes into contact with the pipe 50 at such a position. Also, the occurrence of corrosion can be suppressed.

As illustrated in FIGS. 2 and 4, in some embodiments, in the above configuration, the first seal member 31 has a first seal surface 33 extending along the radial direction of the pipe 50. The first flange portion 32 to be included may be included.
The first flange portion 32 may be formed in an annular shape over the entire circumference of the pipe 50.
In this way, the first flange portion 32 extends along the radial direction of the pipe 50, so that the airtightness between the first seal member 31 and one end 40 of the expansion / contraction member 38 is maintained via the first flange portion 32. The secured connection can be easily made. As a result, it is possible to effectively prevent the inflow of gas into the gap between the pipe 50 and the expansion / contraction member 38 on the outside of the reaction vessel 10. Therefore, it is possible to more effectively prevent the corrosion of the pipe 50 on the outside of the reaction vessel 10 at the penetration portion P of the partition wall 12.
The connection between the first flange portion 32 and the expansion / contraction member 38 may be realized by welding one end 40 of the expansion / contraction member 38 to the peripheral edge portion of the first flange portion 32. Further, the connection between the first flange portion 32 and the pipe 50 may be realized, for example, by welding (factory welding), fitting including tightening, or the like in a factory.

As illustrated in FIGS. 2 and 4, in some embodiments, the first seal member 31 includes an annular ring portion 34 that is airtightly connected to the outer peripheral surface 52 of the pipe 50. 1 The flange portion 32 may be configured to be welded to the outer peripheral surface 52 of the ring portion 34.
The ring portion 34 may be provided on the outer peripheral surface 52 of the pipe 50 by, for example, welding (factory welding), fitting including tightening, or the like in a factory.
With this configuration, the first seal member 31 is formed by welding the first flange portion 32 to the outer peripheral surface 34A of the annular ring portion 34 airtightly connected to the outer peripheral surface 52 of the pipe 50. It is airtightly connected to the outer peripheral surface 52 of the pipe 50 over the entire circumference in the circumferential direction. Therefore, for example, when the first flange portion 32 is welded (on-site welded) and attached at the site, compared with the case where the first flange portion 32 is directly welded to the outer peripheral surface 52 of the pipe 50, during welding and operation. The possibility of damaging the outer peripheral surface 52 of the pipe 50 can be effectively reduced.

In some embodiments, in any of the above configurations, the second seal member 35 is in the pipe axial direction X of the pipe 50, one end of which is airtightly connected to the outer surface 12B of the partition wall 12 or the outer surface forming member 13. Even if the pipe shaft extending portion 36 extending along the pipe shaft extending portion 36 and the second flange portion 37 extending from the other end of the pipe shaft extending portion 36 toward the pipe 50 along the radial direction of the pipe 50 are included. good.
In some embodiments, one end of the second sealing member 35 is the end closer to the reaction vessel 10 (that is, the proximal end when viewed from the reaction vessel 10), and the other end is the end farther from the reaction vessel 10. It may be set (that is, the distal end when viewed from the reaction vessel 10).
With this configuration, the second seal member 35 is airtightly connected to the outer surface 12B of the partition wall 12 or the outer surface forming member 13 at one end of the pipe shaft extending portion 36, and is piped from the other end of the pipe shaft extending portion 36. It is airtightly connected to the telescopic member 38 by the second flange portion 37 extending toward the pipe along the radial direction of 50. At that time, the second flange portion 37 extends from the other end of the pipe shaft extending portion 36 toward the pipe 50 along the radial direction of the pipe 50, so that the second flange portion 37 and the expansion / contraction member 38 are formed. It is possible to easily make a connection that ensures airtightness. As a result, for example, even when the gas in the reaction vessel 10 flows into the pipe shaft extending portion 36 from the gap between the pipe 50 and the partition wall 12, the gas enters the gap between the expansion / contraction member 38 and the pipe 50. It is possible to prevent the inflow and the outflow to the outside of the pipe shaft extending portion 36, and appropriately exert the sealing function.

In some embodiments, in any of the above configurations, the telescopic member 38 comprises a bellows-shaped stretchable portion 39 and one end side flange 40A provided on one end side of the stretchable portion 39. The other end side flange portion 41A provided on the other end side of the expansion / contraction portion 39 may be included.
The stretchable portion 39 may be, for example, a metal expansion.
The one end side flange portion 40A and the other end side flange portion 41A are outer flanges formed so as to be continuous with the end portions of the expansion / contraction portions 39 and extend outward from each end portion in the radial direction. May be good. The flange portion 40A on one end side may be an inner flange extending radially inward (toward the pipe 50 side) from the end portion of the expansion / contraction portion 39.
According to the configuration in which the flange portions are provided at both ends of the telescopic portion 39, since both one end and the other end of the telescopic portion 39 are flange portions, each of the first seal member 31 and the second seal member 35 is provided. And the expansion / contraction member 38 can be easily and surely connected to each other while ensuring airtightness. Further, since the expansion / contraction portion 39 is formed in a bellows shape, it is possible to obtain an expansion / contraction member 38 that can be easily deformed with expansion / contraction in the pipe axis direction X.

In some embodiments, in any of the configurations described above, the reaction vessel 10 may be boiler 2, and the partition wall 12 is a flue 8 communicating with the furnace wall portion 12A of the furnace 10A in the boiler 2 and the furnace 10A. The furnace wall of the above, or a sheet metal for forming these walls may be used, and the pipe 50 may be a boiler pipe used for the boiler 2.
Here, the boiler pipe may be, for example, any pipe such as a heat transfer pipe used for the heat exchanger 7 of the boiler 2, a water supply pipe for transportation or storage, a connecting pipe, or a supply pipe.
According to such a configuration, it is possible to appropriately prevent the corrosion of the pipe 50 extending to the outside of the furnace 10A at the penetration portion P through which the pipe 50 penetrates the furnace wall portion 12A of the furnace 10A of the boiler 2.

In some embodiments, a heat insulating member 60 (insulation member) that covers the outer periphery of the sealing device 30 and the outer peripheral surface 52 of the pipe 50 may be further provided (see, for example, FIG. 3B, FIGS. 4 and 7). ). According to such a configuration, the temperature drop of the gas flowing between the expansion / contraction member 38 and the second seal member 35 can be suppressed, so that the exhaust gas having corrosiveness is lowered to the acid dew point temperature or lower. Can be effectively suppressed.

As described above, according to some embodiments of the present disclosure, corrosion of the pipe 50 in the partition wall penetrating portion can be suppressed.

The present invention is not limited to the above-described embodiment, and includes a modified form of the above-mentioned embodiment and a combination of these embodiments.

1 Thermal power plant 2 Boiler 3 Steam turbine 3A High pressure turbine (steam turbine)
3B low pressure turbine (steam turbine)
4 Generator 5 Condenser 6 Pump 7 Heat exchanger 8 Chimney 9 Chimney 10 Reaction vessel 10A Fireplace 12 Barrier 12A Furnace wall 12B Outer surface 13 Outer surface forming member 13A ECO hopper plate 14 Furnace bottom 15 Fuel 16 Air 20 Burner 30 Seal Device 30A Seal box 31 1st seal member 32 1st flange part 33 1st seal surface 34 Ring part 34A Outer peripheral surface 35 2nd seal member 36 Pipe shaft extension part 37 2nd flange part 38 Telescopic member (metal expansion)
39 Telescopic part (bellows)
40 One end 40A One end side flange 41 The other end 41A The other end flange 50 Piping (boiler pipe)
52 Outer peripheral surface 60 Insulation member (insulation member)
70 Space P Penetration part W1 to W4 Welded part X Pipe axis direction Y Pipe axis vertical direction

Claims (4)

It is a structure that penetrates the partition wall of the reaction vessel.
A partition wall that separates the inside and the outside of the reaction vessel,
At least one pipe that penetrates the partition wall and communicates between the inside and the outside of the reaction vessel.
A sealing device provided on the outside of the reaction vessel.
The first seal member, which is airtightly connected to the outer peripheral surface of the pipe over the entire circumference in the circumferential direction of the pipe.
A second seal member airtightly connected to an outer surface of the partition wall or an outer surface forming member provided on the outer surface of the partition wall over the entire circumference in the circumferential direction of the pipe, outside the outer peripheral surface of the pipe. One end is an elastic member that is airtightly connected to the first seal member, and the other end that is arranged on the opposite side of the one end to the partition wall is airtightly connected to the second seal member. A sealing device that includes a telescopic member, which is formed to absorb the contraction of the pipe in the pipe axis direction.
Equipped with
The second seal member is
A pipe shaft extending portion extending along the pipe axis direction of the pipe, one end of which is airtightly connected to the outer surface of the partition wall or the outer surface forming member.
Includes a second flange portion extending from the other end of the pipe shaft extending portion toward the pipe along the radial direction of the pipe.
The telescopic member
A bellows-shaped elastic part and
The flange portion on one end side provided on one end side of the telescopic portion and the flange portion on one end side.
The other end side flange portion provided on the other end side of the expansion / contraction portion, and the other end side flange portion configured to extend radially outward from the other end of the expansion / contraction portion. Including,
By connecting the outer surface of the second flange portion and the tip end portion of the other end side flange portion by a welded portion, the other end of the expansion / contraction member is airtightly connected to the second seal member.
A structure that penetrates the partition wall of the reaction vessel. The partition wall penetrating structure of a reaction vessel according to claim 1, wherein the first seal member includes a first flange portion having a first seal surface extending along the radial direction of the pipe. The first seal member is
Including an annular ring portion airtightly connected to the outer peripheral surface of the pipe.
The partition wall penetrating structure of the reaction vessel according to claim 2, wherein the first flange portion is welded to the outer peripheral surface of the ring portion. The reaction vessel is a boiler,
The partition wall is the furnace wall of the boiler.
The pipe is a boiler pipe used for the boiler. The partition wall penetrating structure of the reaction vessel according to any one of claims 1 to 3 .

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