A rigid beam structure for a boiler baffle region

Abstract

The present application relates to the technical field of boiler, and proposes a rigid beam structure of a boiler baffle angle area, wherein the bottom of the upper inclined surface tube panel is provided with a first horizontal rigid beam, the top of the lower inclined surface tube panel is provided with a second horizontal rigid beam, the bottom of the horizontal flue is provided with a third horizontal rigid beam, the tube panel of the front package wall of the rear vertical shaft is provided with a fourth horizontal rigid beam, each third horizontal rigid beam is provided with a vertical plane truss group and a vertical plane rigid beam group in the longitudinal plane, the vertical plane rigid beam group comprises a first vertical plane rigid beam and a second vertical plane rigid beam, and the second vertical plane rigid beam is connected with the first vertical plane rigid beam through a horizontal truss group, and the vertical plane truss group comprises a first vertical plane truss rod and a second vertical plane truss rod. The present application can be widely applied to the boiler project in which the tube panels of the baffle angle inclined line super-long area, the baffle angle area and the horizontal flue bottom area are perpendicular to each other, and the deformation of the tube panel under the pressure is prevented.

Description

Technical Field

[0001] This invention relates to the field of boiler technology, and more specifically, to a rigid beam structure for the flame deflector region of a boiler. Background Technology

[0002] In traditional boilers, the tube screens in the flame deflector region and the tube screens at the bottom of the horizontal flue are arranged as a single unit or in the same direction. However, for subcritical boilers of 300MW and below, the tube screens in the flame deflector region and the tube screens at the bottom of the horizontal flue are usually perpendicular to each other: that is, as shown below. Figure 1 and Figure 2 As shown, the flame deflector 10 and the horizontal flue 20 are located between the rear wall of the water-cooled wall and the front wall of the rear shaft. The flame deflector 10 and the horizontal flue 20 are interconnected, and the horizontal flue 20 is connected to the front wall of the rear shaft. For subcritical boilers of 300MW and below, such as Figure 2 As shown, the tube screen in the flame deflector region includes an upper inclined tube screen 11, a vertical flame deflector tube screen 12, and a lower inclined tube screen 13 connected in sequence. The bottom tube screen 21 of the horizontal flue is horizontally set, and the tube axis of the bottom tube screen 21 of the horizontal flue is horizontal. The front wall tube screen 30 of the rear shaft is vertically set, and the tube axis of the front wall tube screen 30 of the rear shaft is vertical. The tube screens in the flame deflector region and the tube screens in the bottom region of the horizontal flue are perpendicular to each other, which means that the tube axis of the upper inclined tube screen 11, the tube axis of the vertical flame deflector tube screen 12, and the tube axis of the lower inclined tube screen 13 are all perpendicular to the tube axis of the bottom tube screen 21 of the horizontal flue.

[0003] Since the tube screen contains pressurized flue gas, it is necessary to support and protect the tube screen in the flame deflector area and the bottom area of ​​the horizontal flue to prevent bending and deformation under pressure. The traditional boiler tube screen arrangement uses rigid beams for support, and the related technology is relatively mature. However, for subcritical boilers of 300MW and below, there is no reference for the support and protection method when the tube screens in the flame deflector area and the bottom area of ​​the horizontal flue are arranged perpendicularly to each other. Therefore, there is an urgent need to provide a rigid beam structure for the boiler flame deflector area in the case of the tube screens in the flame deflector area and the bottom area of ​​the horizontal flue arranged perpendicularly to each other. Summary of the Invention

[0004] The purpose of this invention is to provide a rigid beam structure for the flame deflector area of ​​a boiler, which can be widely used in boiler projects where the flame deflector angle is extremely long and the tube screens in the flame deflector area and the bottom area of ​​the horizontal flue are perpendicular to each other, to prevent the tube screens from bending or deforming under pressure.

[0005] The technical solution adopted in this invention is as follows: This application provides a rigid beam structure for the flame deflector region of a boiler, including a bottom tube screen of a horizontal flue, a front wall tube screen of a rear vertical shaft, and an upper inclined tube screen, a vertical tube screen of the flame deflector, and a lower inclined tube screen connected in sequence. One side of the bottom tube screen of the horizontal flue is connected to the front wall tube screen of the rear vertical shaft, and the other side of the bottom tube screen of the horizontal flue is connected to the upper inclined tube screen. The axial directions of the tubes in the upper inclined tube screen, the vertical tube screen of the flame deflector, the lower inclined tube screen, and the front wall tube screen of the rear vertical shaft are all perpendicular to the axial direction of the tubes in the bottom tube screen of the horizontal flue. A first horizontal rigid beam is provided at the bottom of the upper inclined tube screen, and the axial direction of the first horizontal rigid beam is perpendicular to the axial direction of the tubes in the upper inclined tube screen. A second horizontal rigid beam is provided at the top of the lower inclined tube screen, and the axial direction of the second horizontal rigid beam is perpendicular to the axial direction of the tubes in the lower inclined tube screen. A plurality of third horizontal rigid beams are spaced apart along the axial direction of the first horizontal rigid beam at the bottom of the bottom tube screen of the horizontal flue, and the axial directions of the third horizontal rigid beams are perpendicular to the axial direction of the tubes in the lower inclined tube screen. The pipes of the bottom pipe screen of the horizontal flue are perpendicular to the pipe axis; a fourth horizontal rigid beam is provided on the side of the pipe screen of the front wall of the rear shaft near the bottom pipe screen of the horizontal flue, and the axis of the fourth horizontal rigid beam is perpendicular to the axis of the pipes of the pipe screen of the front wall of the rear shaft; each of the longitudinal planes where the third horizontal rigid beam is located is provided with a vertical truss group and a vertical rigid beam group. Each vertical rigid beam group includes a first vertical rigid beam and a second vertical rigid beam. The first vertical rigid beam is inclined and the second vertical rigid beam is vertical. The tops of the first vertical rigid beam and the second vertical rigid beam are connected to the third horizontal rigid beam. The second vertical rigid beam and the first vertical rigid beam are also connected to each other by a horizontal truss group located below the third horizontal rigid beam; the vertical truss group includes a first vertical truss rod connected between the first horizontal rigid beam and the first vertical rigid beam, and a second vertical truss rod connected between the second horizontal rigid beam and the horizontal truss group.

[0006] Furthermore, in this invention, the horizontal truss assembly includes two side beams and a plurality of intermediate beams located between the two side beams. Each side beam and each intermediate beam are parallel to each other, and each intermediate beam is fixedly connected to the other by a crossbeam. The side beams and intermediate beams are connected by a first horizontal truss rod. The intermediate beam is connected between a second vertical rigid beam and a first vertical rigid beam, and a horizontal truss hanger is provided on the intermediate beam for suspending the intermediate beam.

[0007] Furthermore, in this invention, each end of any side beam is provided with a movable connecting assembly, and each movable connecting assembly includes two connecting plates that are rotatably connected to each other, with one of the connecting plates being rotatably connected to the side beam.

[0008] Furthermore, in this invention, a second horizontal truss rod connects any two adjacent intermediate beams.

[0009] Furthermore, in this invention, a support member is provided between any of the second vertical rigid beams and the front wall panel of the rear shaft.

[0010] Furthermore, in this invention, a retaining plate support is provided between the second vertical rigid beam and the fourth horizontal rigid beam.

[0011] Furthermore, in this invention, the number of first horizontal rigid beams is at least two and they are spaced apart. The vertical truss assembly also includes a third vertical truss rod, which is vertically arranged and connected between the second horizontal rigid beam and the lowest first horizontal rigid beam.

[0012] Furthermore, in this invention, the vertical truss assembly also includes an inclined fourth vertical truss member, the top of which is connected to the connection between the third horizontal rigid beam and the first vertical rigid beam, and the bottom of which is connected to the second vertical rigid beam.

[0013] Furthermore, in this invention, the vertical truss assembly also includes a fifth vertical truss member, which is connected between the fourth vertical truss member and the second vertical rigid beam.

[0014] Compared with the prior art, the present invention has at least the following advantages or beneficial effects: This application provides a rigid beam structure for the boiler flame deflector area, which can be widely used in boiler projects with similar extremely long flame deflector angles, where the tube screens in the flame deflector area and the tube screens at the bottom of the horizontal flue are perpendicular to each other, to prevent the tube screens from bending or deforming under pressure. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a top view of the flame deflector angle and horizontal flue position in the prior art; Figure 2 A side view of the flame deflector angle and horizontal flue position in the prior art; Figure 3 A side view of the rigid beam structure installed on the flame deflector area tube screen and the horizontal flue area tube screen provided in an embodiment of the present invention; Figure 4 A partial top view of a horizontal truss assembly provided in an embodiment of the present invention; Figure 5 for Figure 3 A partial right view of the location of the fourth horizontal rigid beam and the second vertical rigid beam; Figure 6 for Figure 3 A partial left view showing the positions of the first horizontal rigid beam, the second horizontal rigid beam, and the intermediate beam.

[0017] Icons: 10 - Flame deflector; 11 - Upper inclined tube screen; 111 - First horizontal rigid beam; 12 - Vertical tube screen of the flame deflector; 13 - Lower inclined tube screen; 131 - Second horizontal rigid beam; 20 - Horizontal flue; 21 - Bottom tube screen of the horizontal flue; 211 - Third horizontal rigid beam; 30 - Front wall tube screen of the rear shaft; 31 - Fourth horizontal rigid beam; 41 - First vertical rigid beam; 42 - Second vertical rigid beam; 50 - Horizontal truss assembly; 51 - Side beam; 52-Intermediate beam; 521-Horizontal truss hanger; 53-Crossbeam; 54-First horizontal truss member; 55-Second horizontal truss member; 56-Modible connection assembly; 561-Connecting plate; 562-Pin; 61-First vertical truss member; 62-Second vertical truss member; 63-Third vertical truss member; 64-Fourth vertical truss member; 65-Fifth vertical truss member; 70-Support member; 80-Clamping plate support; 90-Water-cooled wall rear wall hanger. Detailed Implementation

[0018] The embodiments of this application will now be described in detail with reference to the accompanying drawings. Example

[0019] Please refer to Figures 3-6 This embodiment provides a rigid beam structure for the boiler's flame deflector region, including a horizontal flue bottom tube screen 21, a rear vertical shaft front wall tube screen 30, and sequentially connected upper inclined tube screen 11, flame deflector vertical tube screen 12, and lower inclined tube screen 13. One side of the horizontal flue bottom tube screen 21 is connected to the rear vertical shaft front wall tube screen 30, and the other side of the horizontal flue bottom tube screen 21 is connected to the upper inclined tube screen 11; according to Figure 3As shown, the pipes of the upper inclined pipe screen 11 are inclined in the axial direction, the pipes of the flame deflector vertical pipe screen 12 are vertical in the axial direction, the pipes of the lower inclined pipe screen 13 are inclined in the axial direction, the pipes of the rear shaft front wall-encasing pipe screen 30 are vertical in the axial direction, and the pipes of the bottom pipe screen 21 of the horizontal flue are horizontal in the axial direction. The pipe axial directions of the upper inclined pipe screen 11, the flame deflector vertical pipe screen 12, the lower inclined pipe screen 13, and the rear shaft front wall-encasing pipe screen 30 are all perpendicular to the pipe axial direction of the bottom pipe screen 21 of the horizontal flue. The upper inclined tube panel 11 has two first horizontal rigid beams 111 at its bottom, with the axis of the first horizontal rigid beams 111 perpendicular to the axis of the tubes of the upper inclined tube panel 11. The lower inclined tube panel 13 has a second horizontal rigid beam 131 at its top, with the axis of the second horizontal rigid beam 131 perpendicular to the axis of the tubes of the lower inclined tube panel 13. The bottom of the horizontal flue bottom tube panel 21 has a plurality of third horizontal rigid beams 211 spaced at equal intervals along the axis of the first horizontal rigid beams 111, with the axis of the third horizontal rigid beams 211 perpendicular to the axis of the tubes of the horizontal flue bottom tube panel 21. The rear shaft front wall tube panel 30 has a fourth horizontal rigid beam 31 on the side near the bottom of the horizontal flue bottom tube panel 21, with multiple fourth horizontal rigid beams 31 spaced at intervals along the vertical direction, and the axis of the fourth horizontal rigid beam 31 perpendicular to the axis of the tubes of the rear shaft front wall tube panel 30. In this description, the upper and lower directions refer to the height direction when the boiler is in use. For boiler projects with extremely long oblique lines for flame deflection and where the tube screens at the bottom of the horizontal flue and the tube screens in the flame deflection area are perpendicular to each other, balancing the forces in the horizontal and vertical directions is a design challenge for rigid beam structures.

[0020] Therefore, in this embodiment, each of the longitudinal planes where the third horizontal rigid beam 211 is located is provided with a vertical truss group and a vertical rigid beam group. Each vertical rigid beam group includes a first vertical rigid beam 41 and a second vertical rigid beam 42. The first vertical rigid beam 41 is inclined and its top is located on the third horizontal rigid beam 211. The top of the first vertical rigid beam 41 is near the end of the front wall panel 30 of the rear shaft. The second vertical rigid beam 42 is vertically arranged and its top is located on the third horizontal rigid beam 211. A horizontal truss group 50 is connected between the second vertical rigid beam 42 and the first vertical rigid beam 41. The horizontal truss group 50 is located below the third horizontal rigid beam 211.

[0021] The vertical truss assembly includes a first vertical truss member 61 connecting the first horizontal rigid beam 111 and the first vertical rigid beam 41, and a second vertical truss member 62 connecting the second horizontal rigid beam 131 and the horizontal truss assembly 50. The vertical truss assembly also includes a third vertical truss member 63, a fourth vertical truss member 64, and a fifth vertical truss member 65. The third vertical truss member 63 is vertically positioned and connects the second horizontal rigid beam 131 to the lowest point of the first horizontal rigid beam 111. The fourth vertical truss member 64 is inclined, with its top connected to the connection between the third horizontal rigid beam 211 and the first vertical rigid beam 41, and its bottom connected to the second vertical rigid beam 42. The fifth vertical truss member 65 connects the fourth vertical truss member 64 to the second vertical rigid beam 42.

[0022] like Figure 4 As shown, the horizontal truss assembly 50 of this embodiment includes two side beams 51 and a plurality of intermediate beams 52 located between the two side beams 51. Each side beam 51 and each intermediate beam 52 are parallel to each other, and each intermediate beam 52 is fixedly connected to each other by a crossbeam 53. The side beams 51 and the intermediate beams 52 are connected by a first horizontal truss rod 54, and a second horizontal truss rod 55 is connected between any two adjacent intermediate beams 52. The intermediate beams 52 are connected between the second vertical rigid beam 42 and the first vertical rigid beam 41. The intermediate beams 52 are provided with horizontal truss hangers 521 for suspending the intermediate beams 52. During installation, the intermediate beams 52 are suspended from the existing water-cooled wall rear wall hangers 90 by the horizontal truss hangers 521.

[0023] like Figure 4 As shown, in this embodiment, each end of any side beam 51 is provided with a movable connecting assembly 56. Each movable connecting assembly 56 includes two connecting plates 561, which are rotatably connected by a pin 562. One of the connecting plates 561 is rotatably connected to the side beam 51 by the pin 562. In actual use, the movable connecting assembly 56 is used to connect the water-cooled wall sidewall and the rear shaft sidewall. Specifically, according to... Figure 4 As shown, the leftmost connecting plate 561 is welded and fixed to the rigid beam tension plate of the water-cooled wall sidewall, and the rightmost connecting plate 561 is welded and fixed to the rigid beam tension plate of the rear shaft sidewall. This design allows the horizontal forces on both sides of the horizontal truss assembly 50 to be balanced. Since the expansion amounts are different in the horizontal direction, in this embodiment, the two connecting plates 561 are rotatably connected by a pin 562, and the connecting plate 561 is rotatably connected to the side beam 51 by a pin 562. This allows the rotation of the connecting plate 561 to offset the corresponding expansion amounts.

[0024] like Figures 3-5As shown, in this embodiment, a support member 70 is provided between any of the second vertical rigid beams 42 and the front wall panel 30 of the rear shaft. The support member 70 is made of metal. One part of the support member 70 is welded to the second vertical rigid beam 42, and the other part is welded to the embedded steel plate on the corresponding front wall panel 30 of the rear shaft. The support member 70 is mainly used to support and fix the second vertical rigid beam 42. In this embodiment, a clamping plate support 80 is provided between the second vertical rigid beam 42 and the fourth horizontal rigid beam 31. The clamping plate support 80 is made of metal and is welded to the fourth horizontal rigid beam 31. The clamping plate support 80 is clamped onto the second vertical rigid beam 42. The clamping plate support 80 can be embedded into the second vertical rigid beam 42 for clamping and engagement. The clamping plate support 80 is used to clamp and limit the second vertical rigid beam 42.

[0025] Thus, the upper inclined tube screen 11 of the flame deflector transmits its furnace pressure to the first horizontal rigid beam 111, the lower inclined tube screen 13 of the flame deflector transmits its furnace pressure to the second horizontal rigid beam 131, the bottom tube screen 21 of the horizontal flue transmits its furnace pressure to the third horizontal rigid beam 211, and the tube screen 30 of the rear shaft front wall transmits its furnace pressure to the fourth horizontal rigid beam 31. The first horizontal rigid beam 111, the second horizontal rigid beam 131, the third horizontal rigid beam 211, and the fourth horizontal rigid beam 31 transmit the furnace pressure they receive to the vertical truss assembly and the vertical rigid beam assembly. Among them, the vertical force transmitted by the first vertical truss rod 61, the second vertical truss rod 62, the third vertical truss rod 63, and the first vertical rigid beam 41 in the vertical truss assembly is transmitted to the horizontal truss assembly 50, and then transmitted to the water-cooled wall rear wall hanger 90 through the horizontal truss hanger 521, thereby transmitting the vertical force to the water-cooled wall rear wall. The vertical forces transmitted by the fourth vertical truss member 64, the fifth vertical truss member 65, and the second vertical rigid beam 42 in the vertical truss assembly are transferred to the support member 70, and then to the front wall panel of the rear shaft through the support member 70. The horizontal reaction forces generated on both sides of the horizontal truss assembly 50 are mutually canceled out by the horizontal truss assembly 50. This clear force transmission path can prevent the panel from bending or deforming under pressure. This rigid beam structure can be widely used in boiler projects with similar long flame deflector angles and where the panel at the bottom of the horizontal flue and the panel in the flame deflector angle are perpendicular to each other. Unlike the traditional boiler arrangement where the flame deflector panel and the horizontal flue panel are integrated or aligned, this is a novel flame deflector angle rigid beam structure with a compact structure and reasonable layout.

Claims

1. A rigid beam structure for the flame deflector region of a boiler, comprising a horizontal flue bottom tube screen (21), a rear vertical shaft front wall tube screen (30), and an upper inclined tube screen (11), a flame deflector vertical tube screen (12), and a lower inclined tube screen (13) connected in sequence, wherein one side of the horizontal flue bottom tube screen (21) is connected to the rear vertical shaft front wall tube screen (30), and the other side of the horizontal flue bottom tube screen (21) is connected to the upper inclined tube screen (11); the axial direction of the tubes of the upper inclined tube screen (11), the axial direction of the tubes of the flame deflector vertical tube screen (12), the axial direction of the tubes of the lower inclined tube screen (13), and the axial direction of the tubes of the rear vertical shaft front wall tube screen (30) are all perpendicular to the axial direction of the tubes of the horizontal flue bottom tube screen (21); characterized in that: The upper inclined pipe screen (11) is provided with a first horizontal rigid beam (111) at the bottom, and the axis of the first horizontal rigid beam (111) is perpendicular to the axis of the pipe of the upper inclined pipe screen (11); the lower inclined pipe screen (13) is provided with a second horizontal rigid beam (131) at the top, and the axis of the second horizontal rigid beam (131) is perpendicular to the axis of the pipe of the lower inclined pipe screen (13); the bottom of the horizontal flue bottom pipe screen (21) is provided with a plurality of third horizontal rigid beams (211) spaced apart along the axis of the first horizontal rigid beam (111), and the axis of the third horizontal rigid beams (211) is perpendicular to the axis of the pipe of the horizontal flue bottom pipe screen (21); the rear shaft front wall-encasing pipe screen (30) is provided with a fourth horizontal rigid beam (31) on the side near the horizontal flue bottom pipe screen (21), and the axis of the fourth horizontal rigid beam (31) is perpendicular to the axis of the pipe of the rear shaft front wall-encasing pipe screen (30); Each of the third horizontal rigid beams (211) has a vertical truss group and a vertical rigid beam group in its longitudinal plane. Each vertical rigid beam group includes a first vertical rigid beam (41) and a second vertical rigid beam (42). The first vertical rigid beam (41) is inclined and the second vertical rigid beam (42) is vertical. The tops of the first vertical rigid beam (41) and the second vertical rigid beam (42) are connected to the third horizontal rigid beam (211). The second vertical rigid beam (42) and the first vertical rigid beam (41) are also connected to each other by a horizontal truss group (50) located below the third horizontal rigid beam (211). The vertical truss assembly includes a first vertical truss member (61) connected between the first horizontal rigid beam (111) and the first vertical rigid beam (41), and a second vertical truss member (62) connected between the second horizontal rigid beam (131) and the horizontal truss assembly (50).

2. The rigid beam structure for the boiler flame deflector region according to claim 1, characterized in that, The horizontal truss assembly (50) includes two side beams (51) and a plurality of intermediate beams (52) located between the two side beams (51). Each side beam (51) and each intermediate beam (52) are parallel to each other, and each intermediate beam (52) is fixedly connected to each other by a crossbeam (53). The side beams (51) and the intermediate beams (52) are connected by a first horizontal truss rod (54). The intermediate beam (52) is connected between the second vertical rigid beam (42) and the first vertical rigid beam (41), and the intermediate beam (52) is provided with a horizontal truss hanger (521) for suspending the intermediate beam (52).

3. The rigid beam structure for the boiler flame deflector region according to claim 2, characterized in that, Each of the side beams (51) is provided with a movable connecting assembly (56) at both ends. Each movable connecting assembly (56) includes two connecting plates (561) that are rotatably connected to each other. One of the connecting plates (561) is rotatably connected to the side beam (51).

4. The rigid beam structure for the boiler flame deflector region according to claim 2, characterized in that, A second horizontal truss rod (55) connects any two adjacent intermediate beams (52).

5. A rigid beam structure for the boiler flame deflector region according to any one of claims 1-4, characterized in that, A support member (70) is provided between any of the second vertical rigid beams (42) and the front wall panel (30) of the rear shaft.

6. A rigid beam structure for the boiler flame deflector region according to any one of claims 1-4, characterized in that, A retaining plate support (80) is provided between the second vertical rigid beam (42) and the fourth horizontal rigid beam (31).

7. A rigid beam structure for the boiler flame deflector region according to any one of claims 1-4, characterized in that, The number of the first horizontal rigid beams (111) is at least two and they are spaced apart. The vertical truss group also includes a third vertical truss rod (63), which is vertically arranged and connected between the second horizontal rigid beam (131) and the lowest first horizontal rigid beam (111).

8. A rigid beam structure for the boiler flame deflector region according to any one of claims 1-4, characterized in that, The vertical truss assembly also includes an inclined fourth vertical truss rod (64), the top of which is connected to the connection between the third horizontal rigid beam (211) and the first vertical rigid beam (41), and the bottom of which is connected to the second vertical rigid beam (42).

9. A rigid beam structure for the boiler flame deflector region according to claim 8, characterized in that, The vertical truss assembly also includes a fifth vertical truss member (65), which is connected between the fourth vertical truss member (64) and the second vertical rigid beam (42).

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