Lining structure suitable for expansion joint of returner of circulating fluidized bed boiler

Abstract

The utility model belongs to the technical field of circulating fluidized bed boilers, and particularly relates to a lining structure suitable for an expansion joint of a return feeder of a circulating fluidized bed boiler, which comprises a lining component I, a lining component II and a lining component III which are sequentially arranged from inside to outside, the third lining assembly comprises a transverse L-shaped annular plate, a vertical L-shaped annular plate, a third upper lining plate and a fourth upper lining plate, the transverse L-shaped annular plate is fixedly welded to the lower portion of the expansion joint, and the horizontal portion of the vertical L-shaped annular plate is inserted into a cavity between the transverse L-shaped annular plate and the expansion joint in a penetrating mode; the third upper lining plate and the fourth upper lining plate are fixedly welded to the upper portion of the expansion joint. According to the sealing structure, the transverse L-shaped annular plate and the vertical L-shaped annular plate are matched, so that the sealing structure has the radial expansion and contraction amount, deformation of the vertical L-shaped annular plate, the third upper lining plate and the fourth upper lining plate is effectively prevented, and the effectiveness of the sealing structure is guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of circulating fluidized bed boilers, and in particular relates to an inner lining structure suitable for an expansion joint of a returner of a circulating fluidized bed boiler. Background Art

[0002] Due to its structural reasons, the return feeder of a circulating fluidized bed boiler requires a metal expansion joint to provide expansion capacity. Furthermore, because there is positive pressure fly ash inside it, a reasonable and reliable seal is required to prevent the fly ash from blowing over the metal expansion joint and causing leakage. Therefore, a reasonable lining structure needs to be set inside the metal expansion joint. The lining structure in the prior art only has three sets of upper and lower lining plates interlaced with each other. However, since the expansion of the metal expansion joint is not only reflected in the axial direction, but also has radial expansion, and the upper and lower lining plates are fixed in the radial direction and have no expansion capacity, it often causes deformation of the upper or lower lining plate, and then the seal between the upper and lower lining plates fails, causing the fly ash to be blown onto the metal expansion joint, resulting in damage to the metal expansion joint. Utility Model Content

[0003] In view of the above problems, the utility model provides an inner lining structure suitable for an expansion joint of a returner of a circulating fluidized bed boiler.

[0004] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0005] A lining structure suitable for a circulating fluidized bed boiler return material expansion joint, comprising a lining assembly 1, a lining assembly 2 and a lining assembly 3 arranged in sequence from the inside to the outside, wherein the lining assembly 1 comprises an upper lining plate No. 1 and a lower lining plate No. 1, wherein the upper lining plate No. 1 is fixedly welded to the upper portion of the expansion joint, the lower lining plate No. 1 is fixedly welded to the lower portion of the expansion joint, and the lower lining plate No. 1 is inserted into the interior of the upper lining plate No. 1, wherein the lining assembly 2 comprises an upper lining plate No. 2 and a lower lining plate No. 2, wherein the upper lining plate No. 2 is fixedly welded to the lower portion of the expansion joint, the lower lining plate No. 2 is fixedly welded to the lower portion of the expansion joint, and the lower lining plate No. 2 is inserted into the interior of the upper lining plate No. 2, and the lining assembly 3 comprises a transverse L-shaped ring plate , vertical L-shaped ring plate, No. 3 upper lining plate and No. 4 upper lining plate, the horizontal L-shaped ring plate is fixedly welded to the lower part of the expansion joint, the horizontal part of the vertical L-shaped ring plate is inserted in the cavity between the horizontal L-shaped ring plate and the expansion joint, the No. 3 upper lining plate and the No. 4 upper lining plate are both fixedly welded to the upper part of the expansion joint, and the No. 4 upper lining plate is located on the inner side of the No. 3 upper lining plate, the vertical part of the vertical L-shaped ring plate is inserted between the No. 3 upper lining plate and the No. 4 upper lining plate, and thermal insulation cotton is filled between the lining component one and the lining component two, as well as between the lining component two and the lining component three, a castable layer is laid on the inner side of the No. 4 upper lining plate and the vertical L-shaped ring plate, and an insulation layer is provided on the inner side of the castable layer.

[0006] Furthermore, a reinforcing rib plate is welded to the inner side surface of the fourth upper lining plate.

[0007] Furthermore, the lining component one, lining component two and lining component three are all welded by corresponding equally divided structures, so as to facilitate the transportation and installation of the lining component one, lining component two and lining component three, while increasing the deformation resistance of the lining component one, lining component two and lining component three and enhancing the bonding strength of the casting material layer.

[0008] Compared with the prior art, the utility model has the following advantages:

[0009] The utility model is provided with a horizontal L-shaped ring plate and a vertical L-shaped ring plate. Through the cooperation of the horizontal L-shaped ring plate and the vertical L-shaped ring plate, the sealing structure has radial expansion and contraction, effectively preventing the deformation of the vertical L-shaped ring plate, the third upper lining plate and the fourth upper lining plate, and ensuring the effectiveness of the sealing structure.

[0010] The utility model simultaneously arranges a third upper lining plate and a fourth upper lining plate on the upper part of the vertical L-shaped ring plate, which effectively enhances the sealing performance of the part.

[0011] The lining component one, lining component two and lining component three of the utility model are all welded by corresponding four identical equally divided structures, which can facilitate the transportation and installation of the lining component one, lining component two and lining component three, and at the same time increase the deformation resistance of the lining component one, lining component two and lining component three, and enhance the bonding strength of the casting material layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural diagram of the utility model;

[0013] Figure 2 It is a partial enlarged view of circle A in the present utility model;

[0014] In the figure, there is upper lining plate No. 1, lower lining plate No. 2, upper lining plate No. 3, lower lining plate No. 4, horizontal L-shaped ring plate 5, vertical L-shaped ring plate 6, upper lining plate No. 3, upper lining plate No. 7, upper lining plate No. 4 8, and reinforcing rib plate 9. DETAILED DESCRIPTION

[0015] In order to further illustrate the technical solution of the present invention, the present invention will be further described below through embodiments.

[0016] like Figures 1 to 2As shown, a lining structure suitable for the expansion joint of the return feeder of a circulating fluidized bed boiler comprises a lining component 1, a lining component 2 and a lining component 3 which are arranged in sequence from the inside to the outside, the lining component 1 comprises an upper lining plate 1 and a lower lining plate 2, the upper lining plate 1 is fixedly welded to the upper part of the expansion joint, the lower lining plate 2 is fixedly welded to the lower part of the expansion joint, the lower lining plate 2 is inserted into the interior of the upper lining plate 1, the lining component 2 comprises an upper lining plate 3 and a lower lining plate 4, the upper lining plate 3 is fixedly welded to the lower part of the expansion joint, the lower lining plate 4 is fixedly welded to the lower part of the expansion joint, the lower lining plate 4 is inserted into the interior of the upper lining plate 3, the lining component 3 comprises a horizontal L-shaped ring plate 5, a vertical L-shaped ring plate 6, a three No. 1 upper lining plate 7 and No. 4 upper lining plate 8, the horizontal L-shaped ring plate 5 is fixedly welded at the lower part of the expansion joint, the horizontal part of the vertical L-shaped ring plate 6 is inserted in the cavity between the horizontal L-shaped ring plate 5 and the expansion joint, the No. 3 upper lining plate 7 and the No. 4 upper lining plate 8 are both fixedly welded at the upper part of the expansion joint, and the No. 4 upper lining plate 8 is located on the inner side of the No. 3 upper lining plate 7, the vertical part of the vertical L-shaped ring plate 6 is inserted between the No. 3 upper lining plate 7 and the No. 4 upper lining plate 8, a reinforcing rib plate 9 is welded on the inner side surface of the No. 4 upper lining plate 8, thermal insulation cotton is filled between the lining component one and the lining component two, and between the lining component two and the lining component three, a castable layer is laid on the inner side of the No. 4 upper lining plate 8 and the vertical L-shaped ring plate 6, and an insulation layer is provided on the inner side of the castable layer.

[0017] The lining component one, lining component two and lining component three are all welded by corresponding equally divided structures, so as to facilitate the transportation and installation of the lining component one, lining component two and lining component three, while increasing the deformation resistance of the lining component one, lining component two and lining component three and enhancing the bonding strength of the casting material layer.

[0018] The above shows and describes the main features and advantages of the present invention. It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive. The scope of the present invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations that come within the meaning and range of equivalents of the claims be encompassed within the present invention.

[0019] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A lining structure suitable for an expansion joint of a return feeder of a circulating fluidized bed boiler, comprising a lining assembly 1, a lining assembly 2 and a lining assembly 3 arranged in sequence from the inside to the outside, wherein the lining assembly 1 comprises an upper lining plate (1) and a lower lining plate (2), wherein the upper lining plate (1) is fixedly welded to the upper portion of the expansion joint, the lower lining plate (2) is fixedly welded to the lower portion of the expansion joint, and the lower lining plate (2) is inserted into the interior of the upper lining plate (1), and the lining assembly 2 comprises an upper lining plate (3) and a lower lining plate (4), wherein the upper lining plate (3) is fixedly welded to the lower portion of the expansion joint, the lower lining plate (4) is fixedly welded to the lower portion of the expansion joint, and the lower lining plate (4) is inserted into the interior of the upper lining plate (3), characterized in that: The inner lining assembly three comprises a transverse L-shaped ring plate (5), a vertical L-shaped ring plate (6), a third upper lining plate (7) and a fourth upper lining plate (8), wherein the transverse L-shaped ring plate (5) is fixedly welded to the lower part of the expansion joint, and the horizontal part of the vertical L-shaped ring plate (6) is inserted into the cavity between the transverse L-shaped ring plate (5) and the expansion joint, and the third upper lining plate (7) and the fourth upper lining plate (8) are both fixedly welded to the upper part of the expansion joint, and the fourth upper lining plate (8) is fixedly welded to the upper part of the expansion joint. The lining plate (8) is located on the inner side of the No. 3 upper lining plate (7), the vertical portion of the vertical L-shaped ring plate (6) is inserted between the No. 3 upper lining plate (7) and the No. 4 upper lining plate (8), and thermal insulation cotton is filled between the lining component 1 and the lining component 2, as well as between the lining component 2 and the lining component 3. A casting material layer is applied on the inner side of the No. 4 upper lining plate (8) and the vertical L-shaped ring plate (6), and a thermal insulation layer is provided on the inner side of the casting material layer.

2. The lining structure for a return feeder expansion joint of a circulating fluidized bed boiler according to claim 1, characterized in that: A reinforcing rib plate (9) is welded to the inner side surface of the fourth upper lining plate (8).

3. The lining structure for a return feeder expansion joint of a circulating fluidized bed boiler according to claim 1, characterized in that: The lining component one, lining component two and lining component three are all welded by corresponding equally divided structures, so as to facilitate the transportation and installation of the lining component one, lining component two and lining component three, while increasing the deformation resistance of the lining component one, lining component two and lining component three and enhancing the bonding strength of the casting material layer.

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