JP7316238B2 - Exhaust heat recovery boiler, connector, construction method of exhaust heat recovery boiler - Google Patents

Description

The present invention provides an exhaust heat recovery boiler in which exhaust gas from a gas turbine is led to heat transfer tube panels arranged in multiple rows inside a duct, a connector applied to such an exhaust heat recovery boiler, and its The present invention relates to a construction method for such an exhaust heat recovery boiler.

Combined cycle power plants, which are attracting attention as part of high-efficiency power generation, first generate power using a gas turbine, and the heat in the exhaust gas discharged from the gas turbine is recovered in a heat recovery steam generator (HRSG). The steam generated by the recovery boiler drives a steam turbine to generate electricity. This combined power plant can simultaneously generate power with gas turbines and steam turbines, so power generation efficiency is high and gas turbines have excellent load responsiveness. There is also the advantage of being able to

In this type of combined power plant, heat exchangers such as a superheater, an evaporator, and an economizer are generally arranged in the duct of the heat recovery steam generator for recovering the heat of the exhaust gas from the gas turbine. . The heat exchanger consists of a large number of heat transfer tubes aligned in the vertical direction. A plurality of heat transfer tubes are bundled with a honeycomb support to form a single heat transfer tube panel. A plurality of rows are arranged along the line (see, for example, Patent Document 1).

Conventionally, when heat transfer tube panels arranged in multiple rows along the flow direction of exhaust gas are integrated into one panel block, two heat transfer tube panels located on the upstream end and downstream end side in the flow direction of exhaust gas are attached to each side. Connecting pins protruding in the direction are provided, and round holes formed at both ends of the connecting plate are inserted into these connecting pins, so that three or more rows of heat transfer tube panels arranged along the flow direction of the exhaust gas are connected to the connecting plate. It is fastened and fixed by

JP-A-2000-291901

Since the connecting plate is a member for fixing multiple rows of heat transfer tube panels to one panel block, the positions of the two connecting pins on the heat transfer tube panel side and the two round holes formed in the connecting plate are almost aligned. need to be However, the heat transfer tube panel before being fastened by the connecting plate is suspended from the ceiling of the duct, and each of the heat transfer tube panels arranged in multiple rows is in a movable state. As the number of heat transfer tube panels increases, the tolerance between the connecting pin on the heat transfer tube panel side and the round hole formed in the connecting plate increases, making it difficult to insert the connecting plate into the connecting pin.

SUMMARY OF THE INVENTION The present invention has been made in view of the actual situation of the prior art, and a first object of the present invention is to provide an exhaust heat recovery boiler capable of improving the workability of integrating a plurality of rows of heat transfer tube panels into a panel block. The second object is to provide a connector applicable to such an exhaust heat recovery boiler, and the third object is to provide a construction method for such an exhaust heat recovery boiler. That's what it is.

In order to achieve the above-mentioned first object, a typical present invention is a heat transfer tube configured by bundling a duct through which exhaust gas from a gas turbine is guided, and a plurality of heat transfer tubes suspended inside the duct. a panel, wherein the heat transfer tube panels are arranged in a plurality of rows along the flow direction of the exhaust gas, and each of the heat transfer tube panels is integrated into one panel block by a connector, wherein the panel Among the blocks, the heat transfer tube panel located on the upstream end side in the flow direction of the exhaust gas is provided with a first connecting pin, and the heat transfer tube panel located on the downstream end side in the flow direction of the exhaust gas. A second connecting pin protrudes, and the connecting tool is composed of two connecting members longer than the length between the first connecting pin and the second connecting pin, and both ends of one of the connecting members in the longitudinal direction. A first engaging portion for positioning reference and a first relief portion having a longer longitudinal dimension than the first engaging portion are formed in the portion, and a positioning A second engaging portion for reference and a second escape portion having a longer longitudinal dimension than the second engaging portion are formed, and the two connecting members are formed by the first engaging portion and the second escape portion. are overlapped and inserted into the first connecting pin, and the first relief portion and the second engaging portion are overlapped and inserted into the second connecting pin, and are welded and fixed to each other. is characterized by

Further, in order to achieve the second object, a typical present invention is configured by bundling a duct for guiding exhaust gas from a gas turbine and a plurality of heat transfer tubes suspended inside the duct. heat transfer tube panels, the heat transfer tube panels are arranged in a plurality of rows along the flow direction of the exhaust gas, and each heat transfer tube panel is integrated into one panel block by a connector. Among the panel blocks, a pair of heat transfer tube panels located on both end sides in the flow direction of the exhaust gas are provided with connecting pins, respectively. A connecting tool for integrating heat transfer tube panels into one panel block, comprising a first connecting member and a second connecting member that are longer than the length between the pair of connecting pins, and the first connecting member A first engaging portion for positioning reference and a first relief portion having a longer longitudinal dimension than the first engaging portion are formed at both longitudinal ends of the second connecting member. is formed with a second engaging portion for positioning reference and a second relief portion longer in longitudinal dimension than the second engaging portion, and the first connecting member and the second connecting member While the engaging portion and the second relief portion are overlapped and inserted into one of the connecting pins, and the first relief portion and the second engaging portion are overlapped and inserted into the other connecting pin, It is characterized in that it is configured to be fixed by welding to each other.

Further, in order to achieve the third object, a typical present invention is configured by bundling a duct through which exhaust gas from a gas turbine is guided, and a plurality of heat transfer tubes suspended inside the duct. and a heat transfer tube panel, the heat transfer tube panels are arranged in a plurality of rows along the flow direction of the exhaust gas, and each of these heat transfer tube panels is integrated into one panel block by a connector, Among the panel blocks, the heat transfer tube panel located on the upstream end side in the flow direction of the exhaust gas has a first connecting pin projecting therefrom, and the heat transfer tube panel located on the downstream end side in the flow direction of the exhaust gas. A heat transfer tube panel is provided with a second connecting pin , and the heat transfer tube panel is integrated into one panel block by engaging the connecting tool with the first connecting pin and the second connecting pin. In the heat recovery boiler construction method, a first connecting member and a second connecting member longer than the length between the first connecting pin and the second connecting pin are prepared as the connecting tool, and the first A first engaging portion for positioning reference and a first relief portion having a longer longitudinal dimension than the first engaging portion are formed at both ends of the connecting member in the longitudinal direction. Both end portions are formed with a second engaging portion for positioning reference and a second relief portion having a longer longitudinal dimension than the second engaging portion. After inserting the first connecting pin and inserting the first relief portion into the second connecting pin , the second relief portion is inserted into the first connecting pin while being inserted into the first connecting pin. While superimposing the second relief portion on the first engagement portion that is provided, inserting the second engagement portion into the second connection pin, the first relief that is inserted in the second connection pin The second connecting member is superimposed on the first connecting member so that the second engaging portion is superimposed on the part, and then the first connecting member and the second connecting member are welded and fixed. and

According to the exhaust heat recovery boiler, the connector, and the construction method of the exhaust heat recovery boiler of the present invention, it is possible to improve the workability of integrating a plurality of rows of heat transfer tube panels with a panel block. Problems, configurations, and effects other than those described above will be clarified by the following description of the embodiments.

1 is an external perspective view of an exhaust heat recovery boiler; FIG. It is a side view which shows the internal structure of an exhaust-heat-recovery boiler. FIG. 3 is a plan view showing an arrangement state of heat exchangers arranged in a duct of the heat recovery boiler; It is a top view which shows the principal part of a panel block. It is a side view which shows the principal part of a panel block. It is a perspective view which shows the principal part of a panel block. It is an exploded perspective view showing the important section of a panel block. The 1st connection member used for a panel block is shown, the same figure (a) is a side view, The same figure (b) is sectional drawing. The 2nd connection member used for a panel block is shown, The same figure (a) is a side view, The same figure (b) is sectional drawing. FIG. 5 is a cross-sectional view showing an enlarged portion A of FIG. 4 ; It is a side view which shows the modification of a coupler. It is a side view which shows the other modification of a coupler.

Embodiments of the present invention will be described below with reference to FIGS. 1 to 12. FIG.

FIG. 1 is an external perspective view of the heat recovery steam generator, FIG. 2 is a side view showing the internal structure of the heat recovery boiler, and FIG.

As shown in FIGS. 1 and 2, the heat recovery boiler 1 includes a duct 3 through which exhaust gas 2 from a gas turbine (not shown) is guided, and the duct 3 is connected to the ground via a plurality of frames 4. Supported. Inside the duct 3, a heat exchanger 5 such as a superheater, an evaporator, an economizer, etc., and a denitrification device 6 are arranged. After being introduced and sequentially passing through a plurality of heat exchangers 5 and a denitrification device 6 , it is discharged from the chimney 7 to the outside of the duct 3 . These heat exchangers 5 have a plurality of heat transfer tubes 8 extending in the vertical direction so as to intersect the flow direction of the exhaust gas 2 . A drum 10 connected via a header 9 is installed.

FIG. 3 is a plan view showing the arrangement state of the heat exchangers 5 arranged inside the duct 3. As shown in FIG. constitutes the heat transfer tube panel 11. Each heat exchanger 5 is arranged in the duct 3 in a state in which a plurality of rows of heat transfer tube panels 11 are unitized into one panel block 12. For example, the heat exchanger 5 closest to the inlet of the duct 3 Three rows (three sheets) of heat transfer tube panels 11 arranged along the flow direction of the exhaust gas 2 are unitized into a panel block 12, and the fourth heat exchanger 5 counted from the entrance of the duct 3, the exhaust gas 2 Eight rows (eight sheets) of heat transfer tube panels 11 arranged along the flow direction are unitized into a panel block 12 .

Baffle plates 13 are provided on both sides of the panel block 12 , and these baffle plates 13 partition the area where the heat transfer tube panel 11 is arranged and the area on the inner wall side of the duct 3 . The baffle plate 13 is made of a material such as a steel plate that has rigidity even in high-temperature exhaust gas. is assembled. The configuration and assembly procedure of the panel block 12 will be described below with reference to FIGS. 4 to 10. FIG.

4 is a plan view showing essential parts of the panel block 12, FIG. 5 is a side view showing essential parts of the panel block 12, FIG. 6 is a perspective view showing essential parts of the panel block 12, and FIG. FIG. 8 shows a first connecting member used for the panel block 12, FIG. 8(a) is a side view, FIG. 9(b) is a sectional view, and FIG. The second connecting member is shown, FIG. 10(a) is a side view, FIG. 10(b) is a cross-sectional view, and FIG.

As shown in FIGS. 4 to 7, among the heat transfer tube panels 11 arranged in a plurality of rows (for example, 8 rows) along the flow direction of the exhaust gas 2, the heat transfer tube panels 11 are positioned on the upstream end side and the downstream end side in the flow direction of the exhaust gas 2. Connecting pins 14 and 15 are provided on the two heat transfer tube panels 11, respectively. For the sake of convenience, the connecting pin 14 protruding from the heat transfer tube panel 11 on the upstream end side will be referred to as a first connecting pin, and the connecting pin 15 protruding from the heat transfer tube panel 11 on the downstream end side will be referred to as a second connecting pin. The first connecting pin 14 and the second connecting pin 15 are welded and fixed to a honeycomb support 16 that bundles a plurality of heat transfer tubes 8 with the heat transfer tube panel 11, and each penetrates the baffle plate 13 and protrudes outward. there is By inserting the connector 17 into the first connecting pin 14 and the second connecting pin 15 from the outside of the baffle plate 13, a plurality of rows of the heat transfer tube panels 11 including both upper and lower end sides in the flow direction of the exhaust gas 2 are formed into panel blocks. 12 are integrated.

The connecting member 17 is composed of an elongated first connecting member 18 and a second connecting member 19. The first connecting member 18 and the second connecting member 19 are made of SS (rolled steel) or SUS (stainless steel). It is formed using a metal plate such as steel).

As shown in FIG. 8, the first connecting member 18 is a plate material having a rectangular outer shape, and a round hole 18a is formed at one end in the longitudinal direction, and a long hole 18b is formed at the other end in the longitudinal direction. formed. The round hole 18 a is a positioning reference first engaging portion inserted into the first connecting pin 14 , and the size of the round hole 18 a is set slightly larger than the diameter of the first connecting pin 14 . On the other hand, the elongated hole 18b is a first relief portion inserted into the second connecting pin 15, and the length P1 from the center of the round hole 18a to the center of the elongated hole 18b is equal to that of the first connecting pin 14 and the second connecting pin. It is set to be substantially the same as the separation distance P of 15. As a result, even if the separation distance P between the first linking pin 14 and the second linking pin 15 varies, the round hole 18a and the long hole 18b of the first linking member 18 are aligned with the corresponding first linking pin 14 and the second linking pin 14 . It can be inserted into the connecting pin 15 . A chamfered portion 18a-1 is formed on the outer peripheral edge of the round hole 18a, and a chamfered portion 18b-1 is also formed on the outer peripheral edge of the long hole 18b.

As shown in FIG. 9, the second connecting member 19 is a substantially rectangular plate having a length dimension slightly smaller than that of the first connecting member 18, and a round hole 19a is formed at one longitudinal end of the second connecting member 19. A long hole 19b is formed at the other end in the longitudinal direction. The round hole 19 a is a second engaging portion for positioning reference inserted into the second connecting pin 15 , and the size of the round hole 19 a is set slightly larger than the diameter of the second connecting pin 15 . On the other hand, the elongated hole 19b is a second relief portion inserted into the first connecting pin 14, and the length P2 from the center of the round hole 19a to the center of the elongated hole 19b is equal to that of the first connecting pin 14 and the second connecting pin. It is set to be substantially the same as the separation distance P of 15. As a result, even if the separation distance P between the first connecting pin 14 and the second connecting pin 15 varies, the round hole 19a and the elongated hole 19b of the second connecting member 19 are aligned with the corresponding second connecting pin 15 and the first connecting pin 15. It can be inserted into the connecting pin 14 . Notch portions 19c are formed at the four corners of the second connecting member 19. Although details will be described later, these notch portions 19c are used to weld and fix the first connecting member 18 and the second connecting member 19. of welding allowance is ensured.

Next, an assembly procedure for integrating the heat transfer tube panels 11 in multiple rows with the panel block 12 using the connectors 17 (the first connecting member 18 and the second connecting member 19) will be described.

First, after preparing the first connecting member 18 and the second connecting member 19 corresponding to the number of heat transfer tube panels 11 per panel block 12 (connector preparation step), the second connecting member protruding from one end side of the baffle plate 13 The circular hole 18a of the first connecting member 18 is inserted into the first connecting pin 14, and the long hole 18b of the first connecting member 18 is inserted into the second connecting pin 15 protruding from the other end of the baffle plate 13 (second 1 connecting member insertion step). At this time, even if the separation distance P between the first connecting pin 14 and the second connecting pin 15 varies, the variation is absorbed by the change in the relative positions of the long hole 18b and the second connecting pin 15. , the round hole 18a and the long hole 18b of the first connecting member 18 can be easily inserted into the first connecting member 18 and the second connecting member 19 on the heat transfer tube panel 11 side.

Next, the round hole 19a of the second connecting member 19 is inserted into the second connecting pin 15 protruding from the long hole 18b of the first connecting member 18, and the first connecting member protruding from the round hole 18a of the first connecting member 18 is inserted. The long hole 19b of the second connecting member 19 is inserted into the pin 14 (step of inserting the second connecting member). At this time as well, variations in the separation distance P between the first linking pin 14 and the second linking pin 15 are absorbed by changes in the relative positions of the long hole 19b and the first linking pin 14, so that the second linking member 19 can be easily inserted into the second connecting pin 15 and the first connecting pin 14 on the heat transfer tube panel 11 side.

After the second connecting member 19 is superimposed on the first connecting member 18 in this way, the first connecting member 18 and the second connecting member 19 are welded and fixed (connector welding step). At that time, since the second connecting member 19 has an outer shape with a length dimension smaller than that of the first connecting member 18, and the notch portions 19c are formed at the four corners of the second connecting member 19, A U-shaped welding margin in plan view is secured at both ends of the second connecting member 19 including the cutout portion 19c, and the first connecting member 18 and the second connecting member 19 can be easily connected using such a welding margin. and can be strongly welded.

Finally, the washer 20 is inserted into each of the first connecting pin 14 and the second connecting pin 15, and these washers 20 are fixed to the corresponding first connecting pin 14 and second connecting pin 15 by spot welding or the like, thereby connecting. It prevents the tool 17 (the first connecting member 18 and the second connecting member 19 ) from coming off from the first connecting pin 14 and the second connecting pin 15 . FIG. 10 is a cross-sectional view showing how the connector 17 is inserted into the first link pin 14. As shown in FIG. As shown in FIG. 10 , a weld bead Y, which is a welded portion with the honeycomb support 16 , exists on the base end side of the first connecting pin 14 . Since the chamfered portion 18a-1 is formed at the edge, a space for avoiding interference with the weld bead Y is secured by the chamfered portion 18a-1. Similarly, a weld bead, which is a welded portion to the honeycomb support 16, is also present on the base end side of the second connecting pin 15, and a chamfered portion 18b- 1 is formed, the chamfered portion 18a-1 secures a space for avoiding interference with the weld bead.

Here, the heat transfer tube panel 11 before being fastened by the connector has a structure suspended from the ceiling of the duct 3, and each of the heat transfer tube panels 11 arranged in a plurality of rows is in a movable state. As the number of heat transfer tube panels 11 per panel block 12 increases, the pitch tolerance between the two connecting pins 14 and 15 projecting from the heat transfer tube panels 11 on the upstream end side and the downstream end side in the flow direction of the exhaust gas 2 increases. becomes larger. Therefore, the workers at the installation site have been adjusting the heat transfer tube panel 11 to the inside of the panel block 12 as much as possible to align it with the insertion hole of the connector. Since it is a very heavy and flexible member, the workability of such adjustment work is very poor.

In the exhaust heat recovery boiler 1 according to the present embodiment, the heat transfer tube panels 11 arranged in a plurality of rows along the flow direction of the exhaust gas 2 are integrated into one panel block 12 as a connector 17 at both ends in the longitudinal direction. A first connecting member 18 having a round hole 18a and an elongated hole 18b and a second connecting member 19 having a round hole 19a and an elongated hole 19b at both ends in the longitudinal direction are used to protrude into the heat transfer tube panel 11 on the upstream end side. The round hole 18a and the long hole 19b of the two connecting members 18 and 19 are inserted into the first connecting pin 14 provided, and two connecting pins 15 are inserted into the second connecting pin 15 protruding from the heat transfer tube panel 11 on the downstream end side. Since the first connecting member 18 and the second connecting member 19 are fixed by welding in a state in which the long holes 18b and the round holes 19a of the connecting members 18 and 19 are inserted, the connecting pins 14 and 14 on the heat transfer tube panel 11 side are fixed. To easily insert a connecting tool 17 (a first connecting member 18 and a second connecting member 19) to corresponding connecting pins 14 and 15 even when tolerance between 15 and an insertion hole formed in the connecting tool 17 is increased. be able to. In addition, since a large panel block 12 in which a large number of heat transfer tube panels 11 are integrated can be realized, the work space required between the subdivided panel blocks becomes unnecessary, and the gas of the exhaust heat recovery boiler 1 is reduced accordingly. The length in the machine direction can be shortened.

Further, in the heat recovery steam generator 1 according to the present embodiment, the first connecting member 18 installed inside the panel block 12 is made of a rectangular plate material, and the second connecting member 19 installed outside is made of Since it is made of a plate material with an outer dimension smaller than that of the first connecting member 18 , when the second connecting member 19 is superimposed on the first connecting member 18 , the outer edge of the second connecting member 19 is slightly bent from the first connecting member 18 . The first connecting member 18 and the second connecting member 19 can be fixed by welding using this exposed portion as a welding margin. Moreover, since the cutouts 19c formed at the four corners of the second connecting member 19 secure a large area for welding, the first connecting member 18 and the second connecting member 19 can be welded easily and firmly.

In the above embodiment, the round hole 18a of the first connecting member 18 and the long hole 19b of the second connecting member 19 are inserted into the first connecting pin 14 on the upstream side, and the long hole 18b of the first connecting member 18 is inserted. and the round hole 19a of the second connecting member 19 is inserted into the second connecting pin 15 on the downstream end side. The long hole 19b is inserted into the second connecting pin 15 on the downstream end side, and the long hole 18b of the first connecting member 18 and the round hole 19a of the second connecting member 19 are inserted into the first connecting pin 14 on the upstream side. You can do it.

Further, in the above embodiment, the case of unitizing the group of heat transfer tube panels 11 arranged in eight rows along the flow direction of the exhaust gas 2 into one panel block 12 has been described. 11 is not limited to eight rows, and may be eight rows or more or eight rows or less.

FIG. 11 is a side view of a modification of the connector. The first connecting member 21 and the second connecting member 22 differ from the first connecting member 18 and the second connecting member 19 according to the above embodiment in that the first engaging portion and the second engaging portion and the first relief portion and the second relief portion are formed in a groove shape having openings.

That is, a U-shaped engaging groove 21a is formed at one end in the longitudinal direction of the first connecting member 21, and an escape groove 21b sufficiently wider than the engaging groove 21a is formed at the other end in the longitudinal direction. there is The engaging groove 21a is a first engaging portion for a positioning reference inserted into the first connecting pin 14, and the groove width of the engaging groove 21a is set slightly larger than the diameter of the first connecting pin 14. . On the other hand, the escape groove 21b is a first escape portion to be inserted into the second connecting pin 15, and the length from the center of the engagement groove 21a to the center of the escape groove 21b is equal to that of the first connecting pin 14 and the second connecting pin. It is set to be substantially the same as the separation distance P of 15.

A U-shaped engaging groove 22a is formed at one longitudinal end of the second connecting member 22, and a relief groove 22b sufficiently wider than the engaging groove 22a is formed at the other longitudinal end. The engaging groove 22 a is a second engaging portion for positioning reference inserted into the second connecting pin 15 , and the groove width of the engaging groove 22 a is set slightly larger than the diameter of the second connecting pin 15 . . On the other hand, the escape groove 22b is a second escape portion that is inserted into the first connecting pin 14, and the length from the center of the engaging groove 22a to the center of the escape groove 22b is the same as that of the first connecting pin 14 and the second connecting pin. It is set to be substantially the same as the separation distance P of 15.

When assembling the panel block 12 using the first connecting member 21 and the second connecting member 22 configured in this manner, the engaging groove 21a of the first connecting member 21 is inserted into the first connecting pin 14 on the upstream side. At the same time, after inserting the escape groove 21b of the first connecting member 21 into the second connecting pin 15 on the downstream side, the escape groove 22b of the second connecting member 22 is inserted into the first connecting pin 14 projecting from the engaging groove 21a. At the same time, the engaging groove 22a of the second connecting member 22 is inserted into the second connecting pin 15 protruding from the escape groove 21b, and then the first connecting member 21 and the second connecting member 22 in the laminated state are welded and fixed. good.

FIG. 12 is a side view of another modification of the connecting device, and the connecting device according to this modified example is composed of a first connecting member 23 and a second connecting member 24 formed of metal round bars. The difference between the first connecting member 23 and the second connecting member 24 from the first connecting member 18 and the second connecting member 19 according to the above-described embodiment is that they are made of metal round bars instead of metal plates.

That is, the first connecting member 23 is manufactured using a metal round bar, and has a round hole 23a formed at one end in the longitudinal direction and a long hole 23b formed at the other end in the longitudinal direction. Similarly, the second connecting member 24 is also manufactured using a metal round bar, and is formed with a round hole 24a at one end in the longitudinal direction and with an elongated hole 24b at the other end in the longitudinal direction. .

When assembling the panel block 12 using the first connecting member 23 and the second connecting member 24 configured in this way, the round hole 23a of the first connecting member 23 is inserted into the first connecting pin 14 on the upstream side and the circular hole 23a is inserted. After inserting the long hole 23b of the first connecting member 23 into the second connecting pin 15 on the downstream side, inserting the long hole 24b of the second connecting member 24 into the first connecting pin 14 projecting from the round hole 23a, The round hole 24a of the second connecting member 24 is inserted into the second connecting pin 15 protruding from the long hole 23b, and then the first connecting member 23 and the second connecting member 24 in the laminated state are fixed by welding.

In addition, the present invention is not limited to the above-described embodiments, and includes various modifications. The above-described embodiments have been described in detail in order to explain the present invention in an easy-to-understand manner, and are not necessarily limited to those having all the described configurations.

1 Exhaust heat recovery boiler 2 Exhaust gas 3 Duct 5 Heat exchanger 8 Heat transfer tube 9 Header 11 Heat transfer tube panel 12 Panel block 13 Baffle plate 14 First connection pin 15 Second connection pin 16 Honeycomb support 17 Connector 18 First connection member 18a Round hole (first engagement part)
18a-1 Chamfered portion 18b Long hole (first relief portion)
19 Second connecting member 19a Round hole (second engaging portion)
19b long hole (second relief)
19c Notch 20 Washer 21, 23 First connecting member 22, 24 Second connecting member

Claims (8)

A duct for guiding exhaust gas from a gas turbine, and a heat transfer tube panel configured by bundling a plurality of heat transfer tubes suspended inside the duct, wherein the heat transfer tube panel is arranged in a plurality along the flow direction of the exhaust gas. In a waste heat recovery boiler arranged in rows and each of these heat transfer tube panels integrated into one panel block by a connector,
A first connecting pin is projected from the heat transfer tube panel located on the upstream end side in the flow direction of the exhaust gas among the panel blocks, and the heat transfer tube located on the downstream end side in the flow direction of the exhaust gas. A second connecting pin protrudes from the panel,
The connector comprises two connecting members longer than the length between the first connecting pin and the second connecting pin,
A first engaging portion for positioning reference and a first relief portion having a longer longitudinal dimension than the first engaging portion are formed at both ends in the longitudinal direction of one of the connecting members,
A second engaging portion for positioning reference and a second relief portion having a longer longitudinal dimension than the second engaging portion are formed at both ends of the other connecting member in the longitudinal direction,
The two connecting members are inserted into the first connecting pin by overlapping the first engaging portion and the second relief portion, and are inserted into the first connecting pin by overlapping the first relief portion and the second engaging portion. An exhaust heat recovery boiler, wherein the heat recovery boiler is welded and fixed to each other while being inserted into the second connecting pin. In the heat recovery boiler according to claim 1,
Of the two connecting members, a part of the connecting member positioned inside the panel block is exposed from the connecting member positioned outside, and the exposed portion serves as a welding margin. heat recovery boiler. In the heat recovery boiler according to claim 1 or 2,
The exhaust heat recovery boiler, wherein the first engaging portion and the second engaging portion are round holes, and the first escape portion and the second escape portion are long holes. A duct for guiding exhaust gas from a gas turbine, and a heat transfer tube panel configured by bundling a plurality of heat transfer tubes suspended inside the duct, wherein the heat transfer tube panel is arranged in a plurality along the flow direction of the exhaust gas. It is applied to an exhaust heat recovery boiler in which the heat transfer tube panels are arranged in a row and integrated into one panel block by a connector. Connecting pins are protrudingly provided on the heat transfer tube panels, and a connecting tool for integrating the plurality of rows of heat transfer tube panels into one panel block by engaging with the pair of connecting pins,
A first connecting member and a second connecting member longer than the length between the pair of connecting pins,
A first engaging portion for positioning reference and a first relief portion having a longer longitudinal dimension than the first engaging portion are formed at both ends in the longitudinal direction of the first connecting member,
A second engaging portion for positioning reference and a second escape portion having a longer longitudinal dimension than the second engaging portion are formed at both ends in the longitudinal direction of the second connecting member,
The first connecting member and the second connecting member are inserted into one of the connecting pins by overlapping the first engaging portion and the second escape portion, and the first engaging portion and the second engaging portion are inserted into one of the connecting pins. A coupler characterized in that it is constructed such that it is welded and fixed to each other in a state in which the parts are overlapped and inserted into the other of the coupler pins. A connector according to claim 4, wherein
A connector, wherein the first engaging portion and the second engaging portion are round holes, and the first escape portion and the second escape portion are long holes. A connector according to claim 4 or 5,
Of the first connecting member and the second connecting member, one connecting member installed inside the panel block is made of a rectangular plate, and the other connecting member installed outside is arranged inside. A coupler characterized by being made of a plate member having an outer dimension smaller than that of the plate member to be installed. A connector according to claim 6, wherein
A coupler, characterized in that notches are formed in four corners of a plate member installed outside the panel block. A duct for guiding exhaust gas from a gas turbine, and a heat transfer tube panel configured by bundling a plurality of heat transfer tubes suspended inside the duct, wherein the heat transfer tube panel is arranged in a plurality along the flow direction of the exhaust gas. The heat transfer tube panels are arranged in rows and are integrated into one panel block by a connector. A first connecting pin protrudes from the heat transfer tube panel, and a second connecting pin protrudes from the heat transfer tube panel located on the downstream end side in the flow direction of the exhaust gas. A method for constructing an exhaust heat recovery steam generator in which the plurality of rows of heat transfer tube panels are integrated into one panel block by engaging the connecting member with the second connecting pin,
preparing a first connecting member and a second connecting member longer than the length between the first connecting pin and the second connecting pin as the connecting tool;
A first engaging portion for positioning reference and a first relief portion having a longer longitudinal dimension than the first engaging portion are formed at both ends in the longitudinal direction of the first connecting member,
A second engaging portion for positioning reference and a second escape portion having a longer longitudinal dimension than the second engaging portion are formed at both ends in the longitudinal direction of the second connecting member,
After inserting the first engaging portion of the first connecting member into the first connecting pin and inserting the first relief portion into the second connecting pin , the second relief portion is inserted into the first connecting pin. While inserting the second relief portion onto the first engaging portion inserted into the first connecting pin, inserting the second engaging portion into the second connecting pin, the The second connecting member is superimposed on the first connecting member so that the second engaging portion is superimposed on the first relief portion inserted in the second connecting pin, and then the first connecting member and the second connecting member are fixed by welding.

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