CN210264132U - Variable cross-section steel inner cylinder chimney - Google Patents
Variable cross-section steel inner cylinder chimney Download PDFInfo
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- CN210264132U CN210264132U CN201920867580.2U CN201920867580U CN210264132U CN 210264132 U CN210264132 U CN 210264132U CN 201920867580 U CN201920867580 U CN 201920867580U CN 210264132 U CN210264132 U CN 210264132U
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Abstract
The utility model relates to a building structure technical field of power plant specifically indicates a variable cross section steel inner tube chimney. The steel inner cylinder is arranged on the inner side of the concrete outer cylinder; the steel inner cylinder comprises a lower end inner cylinder positioned at the bottom of the concrete outer cylinder and an upper end inner cylinder positioned at the top of the concrete outer cylinder; the lower end inner cylinder and the upper end inner cylinder are cylindrical cylinders which are coaxially arranged, the diameter of the lower end inner cylinder is larger than that of the upper end inner cylinder, and at least one group of transition inner cylinders which are connected with the lower end inner cylinder and the upper end inner cylinder are arranged between the lower end inner cylinder and the upper end inner cylinder; the transition inner cylinder is a variable-section cylindrical structure with the diameter of the lower end being the same as that of the lower end inner cylinder and the diameter of the upper end being the same as that of the upper end inner cylinder. The utility model discloses a chimney simple structure, simple to operate can effectively promote the back fall that condenses of acidizing fluid, has reduced smoke pollution, has very big spreading value.
Description
Technical Field
The utility model relates to a building structure technical field of power plant specifically indicates a variable cross section steel inner tube chimney.
Background
The sleeve type chimney means that one or more smoke exhaust tubes are arranged in the reinforced concrete outer cylinder, and the smoke exhaust tubes can be connected with 1-2 boilers. The reinforced concrete sleeve chimney adopts a structural form that the bearing outer cylinder is separated from the inner cylinder, the bearing outer cylinder does not directly bear the high temperature and the corrosion action of the flue gas, and the reinforced concrete sleeve chimney has the characteristics of convenience in maintenance, high structural reliability and the like, and is a chimney structural form widely adopted by the flue gas of the current thermal power plant.
The steel sleeve chimney mainly comprises a bearing reinforced concrete outer cylinder, an overhaul supporting platform, a steel inner cylinder and a heat insulation layer, wherein the steel inner cylinder and the heat insulation layer are supported on a foundation or the platform, and a plurality of smoke exhaust cylinders can be arranged according to needs. The steel inner cylinder is generally made into a smoke exhaust cylinder with the same diameter of the upper opening and the lower opening, which is beneficial to the natural formation of negative pressure of smoke. Its main advantages are high impervious and sealing performance, high integrity, light dead weight, short construction period and straight internal surface (low resistance to fume).
At present, due to the improvement of national environmental protection requirements, a plurality of original coal-fired power plant chimneys cannot meet new environmental protection requirements, the flue gas desulfurization device and the original chimneys are modified, the steel inner cylinders of the chimneys are additionally arranged, and in the modification design, if the steel inner cylinders with the same upper and lower opening diameters are adopted, the flue gas flow rate is too high, and acid liquor can be taken away along with flue gas to pollute the environment. Meanwhile, the original diameter of the section of the reinforced concrete outer cylinder cannot be changed, so that the distance between the reinforced concrete outer cylinder and the steel inner cylinder is too small, and an overhauling steel ladder and a platform cannot be arranged.
Disclosure of Invention
The utility model aims at solving the defects of the prior art and providing a variable cross-section steel inner tube chimney.
The technical scheme of the utility model is that: the utility model provides a variable cross section steel inner tube chimney, includes the concrete urceolus, its characterized in that: the steel inner cylinder is arranged on the inner side of the concrete outer cylinder; the steel inner cylinder comprises a lower end inner cylinder positioned at the bottom of the concrete outer cylinder and an upper end inner cylinder positioned at the top of the concrete outer cylinder; the lower end inner cylinder and the upper end inner cylinder are cylindrical cylinders which are coaxially arranged, the diameter of the lower end inner cylinder is larger than that of the upper end inner cylinder, and at least one group of transition inner cylinders which are connected with the lower end inner cylinder and the upper end inner cylinder are arranged between the lower end inner cylinder and the upper end inner cylinder; the transition inner cylinder is a variable-section cylindrical structure with the diameter of the lower end being the same as that of the lower end inner cylinder and the diameter of the upper end being the same as that of the upper end inner cylinder.
Furthermore, the vertical central line of the transition inner cylinder is superposed with the axial lines of the lower end inner cylinder and the upper end inner cylinder.
The transition inner cylinder is of a conical structure with a small upper part and a large lower part, and the end surface of the inner side of the side wall of the transition inner cylinder is a smooth continuous end surface with gradually changed diameter.
Further, the included angle between the side wall of the transition inner cylinder and the axis of the transition inner cylinder is 10-20 degrees.
And a plurality of annular stiffening ribs which are arranged at intervals along the vertical direction are arranged on the outer side wall body of the lower end inner cylinder, the upper end inner cylinder and the transition inner cylinder.
The utility model has the advantages that: 1. the lower end inner cylinder with the large diameter and the upper end inner cylinder with the small diameter are arranged and connected by the transition inner cylinder with the variable cross section, and the smoke at the bottom of the smoke flow velocity in the lower end inner cylinder is blocked by the transition inner cylinder, so that the condensation and falling of acid liquor are effectively promoted, the emission of the smoke containing the acid liquor is reduced, and the pollution of the smoke to the environment is reduced;
2. the diameter of the inner cylinder at the upper end is reduced, so that the gap between the steel inner cylinder and the concrete outer cylinder is enlarged, and a sufficient space is provided for the arrangement of the overhauling crawling ladder and the platform;
3. the conical transition inner cylinder is used as a connecting structure for connecting the upper end inner cylinder and the lower end inner cylinder, so that the steel inner cylinder can be conveniently processed and installed, and the building cost and the installation cost are reduced.
The utility model discloses a chimney simple structure, simple to operate can effectively promote the back fall that condenses of acidizing fluid, has reduced smoke pollution, has very big spreading value.
Drawings
FIG. 1: the structure of the chimney of the utility model is shown schematically;
FIG. 2: the utility model discloses a chimney top view;
wherein: 1-concrete outer cylinder; 2-inner cylinder at upper end; 3-a transition inner cylinder; 4-inner cylinder at lower end; and 5, stiffening ribs.
Detailed Description
The present invention will be described in further detail with reference to the following drawings and specific embodiments.
Referring to fig. 1-2, a variable cross-section steel inner cylinder chimney comprises a concrete outer cylinder 1, in this embodiment, a steel inner cylinder is arranged on the inner side of the concrete outer cylinder 1, and a gap is left between the steel inner cylinder and the concrete outer cylinder 1, so that a maintenance platform and the like can be arranged conveniently.
As shown in fig. 1-2, the steel inner cylinder of the present embodiment includes a lower inner cylinder 4 located at the bottom of the concrete outer cylinder 1 and an upper inner cylinder 2 located at the top of the concrete outer cylinder 1, the lower inner cylinder 4 and the upper inner cylinder 2 are cylindrical cylinders coaxially arranged, the lower inner cylinder 4 is connected to the flue gas inlet, and the upper inner cylinder 2 is connected to the flue gas outlet. Wherein, the diameter of the lower end inner cylinder 4 is larger than that of the upper end inner cylinder 2, the diameter of the upper end inner cylinder 2 is smaller than that of the lower end inner cylinder 4, namely, the clearance between the upper end inner cylinder 2 and the concrete outer cylinder 1 is increased, and the arrangement of a maintenance platform and the like is convenient.
As shown in fig. 1-2, in order to promote the acid solution to condense and fall back, in this embodiment, at least one set of transition inner cylinder 3 connecting the lower end inner cylinder 4 and the upper end inner cylinder 2 is disposed between the lower end inner cylinder 4 and the upper end inner cylinder 2, the transition inner cylinder 3 is a tapered structure with a small top and a large bottom, the end surface of the inner side of the sidewall is a smooth continuous end surface with gradually changing diameter, the diameter of the lower end of the transition inner cylinder 3 is the same as that of the lower end inner cylinder 4, and the diameter of the upper. The transition inner cylinder 3 is coaxially arranged with the lower end inner cylinder 4 and the upper end inner cylinder 2. Wherein, the lateral wall of transition inner tube 3 and the axis contained angle of transition inner tube 3 are 10 ~ 20.
In addition, in order to increase the structural stability, a plurality of annular stiffening ribs 5 are arranged on the outer side wall bodies of the lower end inner cylinder 4, the upper end inner cylinder 2 and the transition inner cylinder 3 at intervals along the vertical direction.
During installation, the diameters of the upper end inner cylinder 2 and the lower end inner cylinder 4 need to be calculated and determined, then the transition inner cylinder 3 is lofted and manufactured, and three sections of steel inner cylinders are subjected to groove welding. And finally, welding a circumferential stiffening rib 5 on the outer side of the steel inner cylinder. During construction, the construction of the variable cross-section steel inner cylinder is the same as the construction method of the conventional steel inner cylinder, and a jacking and inverted installation method is adopted for sectional hoisting construction.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (5)
1. The utility model provides a variable cross section steel inner tube chimney, includes concrete urceolus (1), its characterized in that: the steel inner cylinder is arranged on the inner side of the concrete outer cylinder (1); the steel inner cylinder comprises a lower end inner cylinder (4) positioned at the bottom of the concrete outer cylinder (1) and an upper end inner cylinder (2) positioned at the top of the concrete outer cylinder (1); the lower end inner cylinder (4) and the upper end inner cylinder (2) are cylindrical cylinders which are coaxially arranged, the diameter of the lower end inner cylinder (4) is larger than that of the upper end inner cylinder (2), and at least one group of transition inner cylinders (3) which are used for connecting the lower end inner cylinder (4) and the upper end inner cylinder (2) are arranged between the lower end inner cylinder (4) and the upper end inner cylinder (2); the transition inner cylinder (3) is of a variable cross-section cylindrical structure with the diameter of the lower end being the same as that of the lower end inner cylinder (4) and the diameter of the upper end being the same as that of the upper end inner cylinder (2).
2. The variable cross-section steel inner barrel chimney according to claim 1, characterized in that: the vertical central line of the transition inner cylinder (3) is coincided with the axes of the lower end inner cylinder (4) and the upper end inner cylinder (2).
3. The variable cross-section steel inner barrel chimney according to claim 2, characterized in that: the transition inner cylinder (3) is of a conical structure with a small upper part and a large lower part, and the end surface of the inner side of the side wall of the transition inner cylinder is a smooth continuous end surface with gradually changing diameter.
4. A variable cross-section steel inner barrel chimney according to claim 3, characterized in that: the included angle between the side wall of the transition inner cylinder (3) and the axis of the transition inner cylinder (3) is 10-20 degrees.
5. The variable cross-section steel inner barrel chimney according to claim 1, characterized in that: and a plurality of annular stiffening ribs (5) which are arranged at intervals along the vertical direction are arranged on the outer side wall body of the lower end inner cylinder (4), the upper end inner cylinder (2) and the transition inner cylinder (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920867580.2U CN210264132U (en) | 2019-06-10 | 2019-06-10 | Variable cross-section steel inner cylinder chimney |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920867580.2U CN210264132U (en) | 2019-06-10 | 2019-06-10 | Variable cross-section steel inner cylinder chimney |
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| Publication Number | Publication Date |
|---|---|
| CN210264132U true CN210264132U (en) | 2020-04-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920867580.2U Active CN210264132U (en) | 2019-06-10 | 2019-06-10 | Variable cross-section steel inner cylinder chimney |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113857810A (en) * | 2021-11-01 | 2021-12-31 | 上海锅炉厂有限公司 | Barrel and blade assembly structure and manufacturing process method thereof |
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2019
- 2019-06-10 CN CN201920867580.2U patent/CN210264132U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113857810A (en) * | 2021-11-01 | 2021-12-31 | 上海锅炉厂有限公司 | Barrel and blade assembly structure and manufacturing process method thereof |
| CN113857810B (en) * | 2021-11-01 | 2022-07-26 | 上海锅炉厂有限公司 | Barrel and blade assembly structure and manufacturing process method thereof |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 430040 1 new bridge four, Jin Yin Hu Street, Dongxihu District, Wuhan, Hubei Patentee after: Hubei Electric Power Planning, Design and Research Institute Co.,Ltd. Address before: 430040 1 new bridge four, Jin Yin Hu Street, Dongxihu District, Wuhan, Hubei Patentee before: POWERCHINA HUBEI ELECTRIC ENGINEERING Corp.,Ltd. |
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| CP01 | Change in the name or title of a patent holder |