Nonmetal compensator with square-round transition section
By integrating the square and Circular transition section with the non-metal compensator and adopting a flue gas guide plate, drainage tank and transition arc design, the problems of large flue length and uneven thermal expansion are solved, and uniform expansion and safety of the flue are achieved.
Patent Information
- Application Number
- CN202422426858.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-27
- Publication Date
- 2025-07-01
- Estimated Expiration
- 2034-09-27
AI Technical Summary
In the prior art, the separate arrangement of the square-circular transition section and the non-metal compensator results in a large overall flue length, and there are problems of thermal expansion unevenness and thermal stress concentration.
The square and radial transition section is integrated with the non-metal compensator, and a flue gas guide plate, drainage tank and transition arc design is adopted to ensure uniform distribution of flue gas and uniform thermal expansion, and to reduce stress concentration.
The flue length is reduced, thermal deformation and thermal stress is reduced, flue gas leakage is reduced, and safety is improved.
Smart Images
Figure CN223049678U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of power equipment, in particular to a non-metallic compensator with a square-round transition section. Background Technique
[0002] The gas-steam combined cycle has a high thermal cycle efficiency and meets the social needs of energy conservation and environmental protection. In the gas-steam combined cycle, the high-temperature exhaust gas of the gas turbine enters the waste heat boiler through the flue as the heat source of the waste heat boiler.
[0003] The exhaust flue of the gas turbine adopts a circular cross-section, and the intake flue of the waste heat boiler often adopts a square cross-section. A square-round transition section needs to be configured between them. In order to reduce the uneven expansion caused by the square-round transition, the length of the square-round transition section is relatively large. The non-metallic compensator can well absorb the displacement and deformation generated by the thermal expansion and contraction of the flue, and avoid the destructive effect of thermal stress on the pipeline. In the existing technology, the square-round transition section and the non-metallic compensator are separately arranged, resulting in a relatively large overall length of the flue. Content of the Utility Model
[0004] The utility model provides a non-metallic compensator with a square-round transition section to solve the deficiencies in the current technology. This compensator integrates the square-round transition section and the non-metallic compensator, and at the same time ensures the uniform expansion of the flue cross-section.
[0005] To achieve the above object, the utility model adopts the following technical scheme:
[0006] A non-metallic compensator with a square-round transition section, which includes a square-round transition section and a non-metallic compensation section. This compensator is connected to the gas exhaust flue and the waste heat boiler inlet flue at the upstream and downstream respectively. In order to make the flue gas reach the four corners of the square flue and make the flue gas flow evenly over the entire cross-section, four flue gas guiding plates are provided to guide the high-temperature flue gas to the four corners of the flue, so that the temperature at the four corners of the square flue is the same as that at the four sides. This compensator is provided with drainage grooves, which are arranged on the four sides of the flue, and can avoid the uneven thermal expansion caused by setting the drainage groove on only one side. To avoid stress concentration at the right angles, transition arcs are adopted at the four corners of the square cross-section of the flue.
[0007] The beneficial effects of the utility model: The uniform expansion of the flue gas cross-section is realized through the flue gas guiding plates, the four-side arrangement of the drainage grooves and the transition arcs at the four corners of the square cross-section, which can greatly reduce the length of the flue, and at the same time reduce the thermal deformation and thermal stress, reduce the flue gas leakage, and increase the safety. Description of the Drawings
[0008] Figure 1 It is a schematic diagram of a non-metallic compensator with a square-round transition section.
[0009] Figure 2 It is a scatter diagram of a non-metallic compensator with a square-round transition section.
[0010] Figure 3 It is an axial sectional view of a non-metallic compensator with a square-round transition section.
[0011] Explanation of the markings in the attached drawings of the present utility model:
[0012] 1 - Gas turbine exhaust flue 11 - Exhaust flue flange 2 - Square-round transition section 21 - Circular front flange of the transition section 22 - Square rear flange of the transition section 23 - Drainage groove 231 - Drain pipe 24 - Flue gas guide plate 3 - Non-metallic compensating section 31 - Front flange of the compensating section 32 - Rear flange of the compensating section 33 - Front connection area of the compensating section 34 - Shrinkage area of the compensating section 35 - Rear connection area of the compensating section 36 - Non-metallic filler 37 - Transition arc 4 - Inlet flue of the waste heat boiler 41 - Inlet flue flange Specific embodiments
[0013] The present utility model will be further described below in conjunction with the attached drawings and embodiments.
[0014] See Figure 1 and Figure 2 for the connection structure of the upstream and downstream flues of the non-metallic compensator with a square-round transition section.
[0015] The gas turbine exhaust flue 1 is connected to the square-round transition section 2 through the exhaust flue flange 11 and the circular front flange 21 of the transition section. The square-round transition section 2 is connected to the non-metallic compensating section 3 through the square rear flange 22 of the transition section and the front flange 31 of the compensating section. The non-metallic compensating section 3 is connected to the inlet flue of the waste heat boiler 4 through the rear flange 32 of the compensating section and the inlet flue flange 41.
[0016] Four flue gas guide plates 24 guide the high-temperature flue gas to the four corners of the flue, eliminating the stagnant vortices at the four corners of the square flue, enabling the high-temperature flue gas to reach the four corners, and ensuring that the temperatures at the four corners of the square flue are the same as those in other areas.
[0017] The square-round transition section 2 is provided with a drainage groove 23, and a drain pipe 231 is arranged below the drainage groove 23. Drainage grooves 23 are arranged on all four sides of the square flue to avoid uneven thermal expansion in the cross-section caused by arranging the drainage groove on only one side.
[0018] See Figure 3 for the relative movement between components of the non-metallic compensator with a square-round transition section.
[0019] There is a certain gap between the connection area 35 after the compensation section and the contraction area 34 of the compensation section of the non-metal compensation section 3. The connection area 35 after the compensation section can be inserted into the contraction area 34 of the compensation section. The moving space of the relative movement is filled with a non-metal filler 36. The non-metal filler 36 prevents the leakage of high-temperature flue gas, has very little resistance to the relative movement, and does not affect the relative movement. Transition arcs 37 are adopted at the four corners of the square flue of the non-metal compensation section 3 to avoid stress concentration caused by standard right angles.
Claims
1. A non-metallic compensator with a square-circle transition section, comprising a square-circle transition section and a non-metallic compensation section, characterized in that The square-to-circle transition section is provided with four smoke guide plates, drainage grooves are provided on the four sides of the square section of the square-to-circle transition section, and transition arcs are used at the four corners of the square section of the non-metallic compensation section.