Multi-stage exhaust smoke pipe
By designing a multi-stage exhaust smoke pipe, using bolted connections and ceramic insulation cotton structures, a negative pressure space is formed to suck out external air and cool the exhaust gas, solving the thermal expansion problem of high-temperature exhaust gas on the smoke pipe and protecting the smoke pipe structure.
Patent Information
- Application Number
- CN202420830976.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-22
- Publication Date
- 2025-03-25
- Estimated Expiration
- 2034-04-22
AI Technical Summary
The thermal expansion problem of high-temperature exhaust gas on the exhaust flue pipe of the gas turbine has affected structural integrity, especially in large exhaust flue ducts.
A multi-stage exhaust smoke pipe is designed to connect multiple exhaust structures by bolts, and a gap is left between each structure. The ceramic insulation cotton and orifice plate structure is used, combined with the design of the docking cylinder, a negative pressure space is formed to suck out external air, cool the exhaust gas, and protect the smoke pipe structure.
Through the design of multi-stage exhaust flue pipes, the exhaust gas temperature is effectively reduced, forming a negative pressure space to suck out external air, protecting the exhaust smoke pipe structure, and avoiding the thermal expansion damage of high-temperature exhaust gas to the smoke pipe.
Smart Images
Figure CN222668274U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of exhaust equipment, more specifically to a multi-stage exhaust smoke pipe. Background Art
[0002] The exhaust flue of a gas turbine is a pipe connecting the gas turbine outlet and the atmosphere, which is used to discharge the high-temperature and high-pressure exhaust gas generated by the gas turbine into the atmosphere. The high-temperature exhaust gas will cause thermal expansion of the flue material, which may affect the structural integrity of the flue, especially for large exhaust flues. This effect is more significant. Summary of the invention
[0003] In order to prevent high-temperature smoke from having a serious impact on the smoke pipe, the utility model provides a multi-stage exhaust smoke pipe, which can reduce the temperature of the exhaust gas.
[0004] The above purpose is achieved through the following technical solutions:
[0005] A multi-stage exhaust smoke pipe includes a fixing frame and a chimney, characterized in that: the chimney includes a first-stage exhaust structure, a second-stage exhaust structure and a third-stage exhaust structure, the first-stage exhaust structure, the second-stage exhaust structure and the third-stage exhaust structure are all bolted to the fixing frame, a first-stage butt joint is welded to the first-stage exhaust structure, a second-stage butt joint is welded to the second-stage exhaust structure, the first-stage butt joint is placed in the second-stage exhaust structure, and the second-stage butt joint is placed in the third-stage exhaust structure.
[0006] The circumference of the first-stage docking tube does not contact the inner wall of the second-stage exhaust structure, and the second-stage docking tube does not contact the inner wall of the third-stage exhaust structure; a gap is left between the first-stage exhaust structure and the second-stage exhaust structure, and a gap is left between the second-stage exhaust structure and the third-stage exhaust structure.
[0007] The one-stage exhaust structure, the two-stage exhaust structure and the three-stage exhaust structure are all bolted with a plurality of orifice plates, and ceramic insulation cotton is filled between the one-stage exhaust structure, the two-stage exhaust structure and the three-stage exhaust structure and the corresponding orifice plates.
[0008] The ceramic thermal insulation cotton is staggered 45 degrees for each layer of the seam.
[0009] The beneficial effects of the multi-stage exhaust smoke pipe of the utility model are:
[0010] When the exhaust gas passes through the exhaust smoke pipe, a negative pressure space is formed in the smoke pipe, and then the outside air is sucked into the smoke pipe to cool the high-temperature exhaust gas, thereby protecting the exhaust smoke pipe structure. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 The overall structure of the multi-stage exhaust pipe is shown in Fig. Figure 1 ;
[0012] Figure 2 The overall structure of the multi-stage exhaust pipe is shown in Fig. Figure 2 ;
[0013] Figure 3 It is a schematic diagram of a half-section structure of a multi-stage exhaust smoke pipe;
[0014] Figure 4 It is a schematic diagram of a half-section structure of an exhaust structure;
[0015] Figure 5 It is a structural schematic diagram of a two-stage exhaust structure;
[0016] Figure 6 It is a schematic diagram of the structure of three-stage exhaust;
[0017] Figure 7 It is a structural schematic diagram of the lifting lug;
[0018] Figure 8 This is a schematic diagram of the structure of the rain barrel.
[0019] A fixing frame 1; a first-stage exhaust structure 2; a second-stage exhaust structure 3; a third-stage exhaust structure 4; a lifting lug 11; a rib plate 111; a first-stage butt tube 21; ceramic heat-insulating cotton 22; a perforated plate 23; a second-stage butt tube 31; and a rainproof tube 401. DETAILED DESCRIPTION
[0020] A multi-stage exhaust smoke pipe, such as Figures 1 to 8As shown, a first-stage exhaust structure 2 is fixed to the lower side of the fixing frame 1 by bolts, and then the second-stage exhaust structure 3 is fixed to the fixing frame 1 by bolts, and a first-stage butt tube 21 welded on the upper side of the first-stage exhaust structure 2 is inserted into the interior of the second-stage exhaust structure 3, and finally the third-stage exhaust structure 4 is fixed to the fixing frame 1 by bolts, and a second-stage butt tube 31 welded on the upper side of the second-stage exhaust structure 3 is inserted into the interior of the third-stage exhaust structure 4, and the first-stage exhaust structure 2 and the first-stage butt tube 21 welded thereon are not in contact with the second-stage exhaust structure 3; the second-stage exhaust structure 3 and the second-stage butt tube 31 welded thereon are not in contact with the third-stage exhaust structure 4, so there are gaps between them, thereby completing the installation of the multi-stage exhaust smoke pipe; when the high-temperature and high-speed exhaust gas passes through a first exhaust of the exhaust smoke pipe When the exhaust gas passes through the second exhaust structure 3 of the exhaust duct, a negative pressure space is formed in the first exhaust structure 2, thereby sucking in the outside air from between the first exhaust structure 2 and the second exhaust structure 3, and entering into the smoke pipe through the gap between the first connecting tube 21 and the second exhaust structure 3, and mixing with the high-temperature exhaust gas, thereby cooling the exhaust gas once, thereby achieving the purpose of protecting the smoke pipe structure; when the exhaust gas that has been cooled once subsequently passes through the second exhaust structure 3 of the exhaust duct, a negative pressure space is still formed in the second exhaust structure 3, and the outside air is sucked in from between the second exhaust structure 3 and the third exhaust structure 4, and entering into the smoke pipe through the gap between the second connecting tube 31 and the third exhaust structure 4, and mixing with the high-temperature exhaust gas again, thereby cooling the exhaust gas for a second time, thereby further achieving the purpose of protecting the smoke pipe structure.
[0021] Preferably, the first-stage docking tube 21 and the second-stage docking tube 31 respectively penetrate into the second-stage exhaust structure 3 and the third-stage exhaust structure 4 for a certain distance to prevent the exhaust gas from flowing back and escaping from the gaps, thereby preventing the occurrence of pollution in the working area.
[0022] Preferably, ceramic thermal insulation cotton 22 is laid on the inner walls of the first-stage exhaust structure 2, the second-stage exhaust structure 3 and the third-stage exhaust structure 4, and a layer of perforated plate 23 is laid on the inner side of the ceramic thermal insulation cotton 22, and a plurality of studs are welded on the inner walls of the first-stage exhaust structure 2, the second-stage exhaust structure 3 and the third-stage exhaust structure 4, so that the studs pass through the holes on the ceramic thermal insulation cotton 22 and the perforated plate 23, and the perforated plate 23 is fixed with nuts, so that the perforated plate 23 fixes and isolates the ceramic thermal insulation cotton 22; the seams of each layer of ceramic thermal insulation cotton 22 laid in the first-stage exhaust structure 2, the second-stage exhaust structure 3 and the third-stage exhaust structure 4 are staggered by 45°, which can effectively prevent heat from being transferred from the seams, thereby reducing the thermal bridge effect, increasing the thermal insulation effect of the ceramic thermal insulation cotton 22, and further protecting the structure of the exhaust smoke pipe.
[0023] Preferably, a rainproof cylinder 401 is fixed to the upper end of the three-stage exhaust structure 4 by bolts, and the upper end of the rainproof cylinder 401 is bent to form a slope pointing to the center, so that when it rains, the high-speed airflow in the exhaust smoke duct blows the rainwater to the outside of the exhaust smoke duct, and the rainwater flows down along the slope of the rainproof cylinder 401, thereby preventing the rainwater from entering the interior of the exhaust smoke duct and causing rust, which in turn affects the structural safety of the exhaust smoke duct, thereby further protecting the structure of the exhaust smoke duct.
[0024] Preferably, four lifting ears 11 are welded on the outer walls of the first-stage exhaust structure 2, the second-stage exhaust structure 3 and the third-stage exhaust structure 4, and every four lifting ears 11 are evenly distributed in the corresponding circumferential direction, so as to reduce the shaking of the equipment during lifting, thereby effectively avoiding the first-stage exhaust structure 2, the second-stage exhaust structure 3 and the third-stage exhaust structure 4 from colliding with each other, thereby ensuring the safety of the exhaust smoke pipe; a rib plate 111 is welded on both sides of each lifting ear 11, and the rib plate 111 enhances the supporting strength of the lifting ear 11, thereby ensuring the stable lifting of the first-stage exhaust structure 2, the second-stage exhaust structure 3 and the third-stage exhaust structure 4.
[0025] Preferably, a mounting base is welded to the lower end of a section of the exhaust structure 2, and a plurality of reinforcing ribs are welded between the mounting base and the section of the exhaust structure 2. The mounting base and the exhaust equipment are installed and connected by bolts, thereby connecting the exhaust smoke pipe to the exhaust equipment.
Claims
1. A multi-stage exhaust smoke pipe, comprising a fixing frame (1) and a chimney, characterized in that: The chimney comprises a first-stage exhaust structure (2), a second-stage exhaust structure (3) and a third-stage exhaust structure (4); the first-stage exhaust structure (2), the second-stage exhaust structure (3) and the third-stage exhaust structure (4) are all bolted to a fixing frame (1); a first-stage butt joint tube (21) is welded to the first-stage exhaust structure (2); a second-stage butt joint tube (31) is welded to the second-stage exhaust structure (3); the first-stage butt joint tube (21) is placed in the second-stage exhaust structure (3); and the second-stage butt joint tube (31) is placed in the third-stage exhaust structure (4).
2. The multi-stage exhaust smoke pipe according to claim 1, characterized in that: The circumference of the first-stage butt-joint tube (21) does not contact the inner wall of the second-stage exhaust structure (3), and the second-stage butt-joint tube (31) does not contact the inner wall of the third-stage exhaust structure (4); a gap is left between the first-stage exhaust structure (2) and the second-stage exhaust structure (3), and a gap is left between the second-stage exhaust structure (3) and the third-stage exhaust structure (4).
3. The multi-stage exhaust smoke pipe according to claim 1, characterized in that: The first-stage exhaust structure (2), the second-stage exhaust structure (3) and the third-stage exhaust structure (4) are all bolted with a plurality of orifice plates (23), and ceramic heat-insulating cotton (22) is filled between the first-stage exhaust structure (2), the second-stage exhaust structure (3) and the third-stage exhaust structure (4) and the corresponding orifice plates (23).
4. The multi-stage exhaust smoke pipe according to claim 3, characterized in that: The ceramic thermal insulation cotton (22) is staggered 45 degrees for each layer of the seam.
5. The multi-stage exhaust smoke pipe according to claim 3, characterized in that: The upper end of the three-stage exhaust structure (4) is bolted to a rainproof cylinder (401), and a slope is provided on the rainproof cylinder (401).
6. The multi-stage exhaust smoke pipe according to claim 3, characterized in that: Four lifting ears (11) are welded to the one-stage exhaust structure (2), the two-stage exhaust structure (3) and the three-stage exhaust structure (4), and two ribs (111) are symmetrically welded to each lifting ear (11).
7. The multi-stage exhaust smoke pipe according to claim 6, characterized in that: A mounting base is welded to the lower end of the exhaust structure (2), and a plurality of reinforcing ribs are welded between the mounting base and the exhaust structure (2).