A gas turbine waste heat boiler drum support

Abstract

The utility model discloses a kind of gas turbine waste heat boiler drum supports, including base, backing plate and the saddle for supporting drum, two pieces of polytetrafluoroethylene plate are provided between the backing plate and base, two pieces of polytetrafluoroethylene plate are fixed on backing plate and base respectively, two pieces of polytetrafluoroethylene plate can be freely relatively moved, so that the saddle on backing plate can be freely relatively moved with base along the axial direction of drum.The contact surface of the backing plate and base of the utility model gas turbine waste heat boiler drum support is polytetrafluoroethylene plate, and the friction coefficient is small, so that the saddle for supporting drum can be freely relatively moved along the axial direction of drum relative to base;When drum thermal state expands, the structure effectively releases stress in drum;Base is increased between backing plate and steel frame, avoid support to directly contact with uneven steel frame, improve the flatness of contact surface surface.

Description

Technical Field

[0001] This utility model relates to the field of waste heat boiler technology, and in particular to a boiler drum support for a gas turbine waste heat boiler. Background Technology

[0002] The boiler drum is a crucial component of a boiler, and its stability throughout operation relies on the support of the drum supports. The reliability of these supports plays a critical role in the safe operation of the entire boiler. Due to the frequent start-ups and shutdowns of the gas turbine waste heat boiler, the drum supports are subjected to frequent changes in thermal stress. Conventional drum supports are placed directly on the steel frame. However, the high friction at the contact surfaces, or the unevenness of the steel frame, can severely affect the sliding of the supports. If the sliding of the drum supports is obstructed, it will affect the expansion of the steam drum, generating enormous internal stress, which can lead to localized weld cracks, seriously affecting the boiler's operational safety and service life. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model designs a boiler drum support for a gas turbine waste heat boiler.

[0004] The present invention adopts the following technical solution: A boiler drum support for a gas turbine waste heat boiler includes a base, a pad, and a saddle for supporting the boiler drum. Two polytetrafluoroethylene (PTFE) plates are disposed between the pad and the base. The two PTFE plates are fixed to the pad and the base respectively, and the two PTFE plates can move freely relative to each other, so that the saddle on the pad can move freely relative to the base along the axial direction of the boiler drum.

[0005] When the boiler drum expands due to heat, the saddle will move relative to the base towards both ends of the boiler drum along the axial direction of the boiler drum, allowing the boiler drum to expand freely and extend towards both ends without restriction of deformation, preventing the generation of internal stress and ensuring the safe operation of the boiler.

[0006] Preferably, the saddle includes a stiffening plate and a web plate, and the stiffening plate, the web plate and the pad are fixedly connected to each other.

[0007] Preferably, the stiffening plate, web plate, and pad plate are welded together.

[0008] Preferably, the surfaces of the stiffening plate and the pad are perpendicular to each other.

[0009] Preferably, a boiler drum embedded plate is fixedly installed on the saddle, and a boiler drum is installed on the boiler drum embedded plate.

[0010] Preferably, the bottom of the base is welded to the steel beam of the boiler.

[0011] The boiler drum support for the waste heat boiler of this utility model has a simple structure, stable operation, and easy installation. It effectively supports the boiler drum and meets the expansion requirements, thus having certain industrial application value.

[0012] The beneficial effects of this utility model are: (1) The contact surface between the pad and the base is smooth and made of polytetrafluoroethylene plate with a small coefficient of friction, so that the saddle supporting the pot drum can move freely relative to the base along the axial direction of the pot drum; (2) When the pot drum expands in a hot state, this structure effectively releases the internal stress of the pot drum; (3) Adding a base between the pad and the steel frame avoids the support from directly contacting the uneven steel frame and improves the flatness of the contact surface. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of a gas turbine waste heat boiler drum support according to this utility model; Figure 2 This is an installation diagram of the boiler drum support for a gas turbine waste heat boiler according to this utility model. In the diagram: 1. Saddle, 2. Pad, 3. Base, 4. Boiler drum, 5. Boiler drum embedded plate, 6. PTFE plate, 7. Rib plate, 8. Web plate, 9. Boiler steel structure beam. Detailed Implementation

[0014] The technical solution of this utility model will be further described in detail below through specific embodiments and with reference to the accompanying drawings: Example: Figure 1 As shown, a boiler drum support for a gas turbine waste heat boiler includes a base 3 and a saddle 1 for supporting the boiler drum. A pad 2 for supporting the saddle 1 is provided between the saddle 1 and the base 3. Two polytetrafluoroethylene plates 6 are provided between the pad 2 and the base 3 and are fixed on the pad 2 and the base 3 respectively, so that the saddle 1 can move freely relative to the base 3 along the axial direction of the boiler drum.

[0015] The aforementioned waste heat boiler drum support is used such that at least one drum support is installed at each end of the drum, as follows: Figure 2 As shown, the saddle 1 is welded to the boiler drum 4 via steel plate 5, and the base 3 is welded to the boiler steel structure beam 9. When the boiler drum expands due to heat, it will elongate towards both ends, with the expansion direction as shown... Figure 2 As indicated by the arrow, a pad 2 is provided between the saddle 1 and the base 3, and two polytetrafluoroethylene plates 6 are provided between the pad 2 and the base 3 and fixed to the pad 2 and the base 3 respectively. Therefore, the saddle 1 and the base 3 can move freely relative to each other. When the boiler drum is heated and expands, it drives the saddle 1 to move along the axial direction relative to the base 3 to both ends, so that the boiler drum can expand freely and prevent the generation of internal stress. When the boiler drum cools and contracts, it can drive the saddle 1 to move relative to the base 3 and return to its original position.

[0016] The aforementioned gas turbine waste heat boiler drum support has a simple structure, stable operation, and easy installation. It effectively supports the boiler drum and meets expansion requirements.

[0017] The contact surfaces of the pad 2 and the base 3 are both made of polytetrafluoroethylene (PTFE). PTFE has high chemical resistance and heat resistance, and it does not deform significantly even in high-temperature environments. PTFE also has a very low coefficient of friction, ensuring that the saddle 1 and the base 3 can move freely relative to each other.

[0018] The saddle 1 includes a stiffening plate 7 and a web plate 8; the stiffening plate 7, the web plate 8 and the pad plate 2 are welded together, and the surfaces of the stiffening plate 7 and the pad plate 2 are perpendicular to each other; the saddle 1 can stably support the pot drum; the thickness and number of the stiffening plate 7 and the web plate 8 can be calculated and determined according to the weight of the pot drum being supported; the material is carbon steel with good weldability.

[0019] The embodiments described above are merely preferred solutions of this utility model and are not intended to limit this utility model in any way. Other variations and modifications are possible without departing from the technical solutions described in the claims.

Claims

1. A boiler drum support for a gas turbine waste heat boiler, comprising a base, a pad, and a saddle for supporting the boiler drum, characterized in that, Two polytetrafluoroethylene (PTFE) plates are provided between the pad and the base. The two PTFE plates are fixed on the pad and the base respectively. The two PTFE plates can move freely relative to each other, so that the saddle on the pad can move freely relative to the base along the axial direction of the boiler drum.

2. The boiler drum support for a gas turbine waste heat boiler according to claim 1, characterized in that, The saddle includes a stiffening plate and a web plate, which are fixedly connected to each other.

3. A boiler drum support for a gas turbine waste heat boiler according to claim 2, characterized in that, The stiffening plate, web plate, and pad plate are welded together.

4. A boiler drum support for a gas turbine waste heat boiler according to claim 2, characterized in that, The surfaces of the stiffening plate and the pad are perpendicular to each other.

5. A boiler drum support for a gas turbine waste heat boiler according to claim 1, characterized in that, A boiler drum pre-embedded plate is fixedly installed on the saddle, and a boiler drum is installed on the boiler drum pre-embedded plate.

6. A boiler drum support for a gas turbine waste heat boiler according to claim 1, characterized in that, The base is welded to the bottom of the boiler steel structure beam.

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