CN210087411U - Air cooling steam exhaust system of high-position arranged steam turbine - Google Patents
Air cooling steam exhaust system of high-position arranged steam turbine Download PDFInfo
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- CN210087411U CN210087411U CN201920729204.7U CN201920729204U CN210087411U CN 210087411 U CN210087411 U CN 210087411U CN 201920729204 U CN201920729204 U CN 201920729204U CN 210087411 U CN210087411 U CN 210087411U
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- 238000001816 cooling Methods 0.000 title claims abstract description 45
- 238000000605 extraction Methods 0.000 claims abstract description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 13
- 230000017525 heat dissipation Effects 0.000 claims description 32
- 239000003638 chemical reducing agent Substances 0.000 claims description 10
- 230000002265 prevention Effects 0.000 claims 2
- 230000000903 blocking effect Effects 0.000 claims 1
- 238000007599 discharging Methods 0.000 claims 1
- 238000006073 displacement reaction Methods 0.000 abstract description 5
- 238000010977 unit operation Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 3
- 239000012141 concentrate Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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Abstract
The utility model discloses an air cooling steam exhaust system of a high-position arranged steam turbine, wherein the steam turbine comprises a low-pressure cylinder, and the low-pressure cylinder is provided with a steam exhaust port and a steam extraction port; the steam exhaust pipeline comprises a vertical section and a horizontal section which are communicated with each other; the steam outlet is directly communicated with one end of the vertical section, and the horizontal section extends and passes through the air cooling platform to enable the low-pressure steam to form condensed water; the compensator extends horizontally, and two ends of the compensator are respectively communicated with the vertical section and the horizontal section; the low-pressure heater is at least partially arranged in the vertical section, and the part of the low-pressure heater in the vertical section is provided with an inlet communicated with the steam extraction port. The utility model discloses a steam extraction system makes each floor height of steam turbine factory building set up more rationally, can adapt to the collection of whole factory drainage and condensate water, has solved the big problem of steam extraction device and steam extraction pipeline resistance. Meanwhile, the problems of unbalanced vacuum suction force of the steam turbine, large thrust of a low-pressure cylinder interface and large displacement after deflection are solved.
Description
Technical Field
The utility model relates to a thermal power technology field specifically relates to a high level is arranged steam turbine air cooling steam extraction system.
Background
At present, in a direct air-cooling steam exhaust system, the elevation of an operation layer of a steam turbine generator unit is mostly 13.7-15.5 m, a steam turbine is arranged in a lower steam exhaust mode, a steam exhaust device is arranged on the lower portion of a low pressure cylinder of the steam turbine, and the steam exhaust device is flexibly connected with the low pressure cylinder. The steam outlet pipe is connected from the steam outlet device and is connected to a steam distribution pipe of an air-cooled condenser with the height of more than 50 meters from the ground. The above-mentioned pipes, pipe fittings, compensators and hangers have a large amount of material, and are complicated in design, and the resistance of the steam exhaust device and the steam exhaust pipe is also large. In addition, the requirement on the height of the layer is high while the integral lifting load of the steam exhaust device is concentrated, and great influence on a civil engineering structure can be generated. Meanwhile, the horizontal height of equipment (such as a hot well, a flash tank and the like) which is intensively arranged in the steam exhaust device is high, so that the drainage and the collection of condensed water in the whole plant are not facilitated.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming the problem that prior art exists, provide a high-order steam turbine air cooling exhaust system of arranging, this exhaust system makes each floor height of steam turbine factory building set up more rationally, can adapt to the collection of whole factory drainage and condensate water, has also solved the big problem of steam extraction device and steam exhaust pipeline resistance simultaneously. Meanwhile, the problems of unbalanced vacuum suction force of the steam turbine, large thrust of a low-pressure cylinder interface and large displacement after deflection are solved.
In order to achieve the purpose, the utility model provides an air-cooled steam exhaust system of a high-position arranged steam turbine, which comprises a boiler, a steam turbine, a steam exhaust pipeline, a low-pressure heater, a compensator and an air-cooled platform; the steam turbine comprises a low-pressure cylinder, and the low-pressure cylinder is provided with a steam exhaust port and a steam extraction port; the steam exhaust pipeline comprises a vertical section and a horizontal section which are communicated with each other; the steam outlet of the boiler is arranged at the same height as the steam inlet of the steam turbine and is connected with the steam inlet of the steam turbine through a steam pipeline; the steam outlet is directly communicated with one end of the vertical section, and the horizontal section extends and passes through the air cooling platform to enable low-pressure steam to form condensed water; the compensator extends horizontally, and two ends of the compensator are respectively communicated with the vertical section and the horizontal section; the low-pressure heater is at least partially arranged in the vertical section, and the part of the low-pressure heater, which is positioned in the vertical section, is provided with an inlet communicated with the steam extraction port.
Preferably, both ends of the low-pressure heater extend out of the vertical section, and the low-pressure heater is sealed with the vertical section through a sleeve.
Preferably, the steam turbine includes high pressure cylinder, high-order steam turbine air cooling steam exhaust system of arranging include with the tertiary temperature and pressure reducer that highly compressed bypass is connected, tertiary temperature and pressure reducer at least part sets up in the vertical section, the export of tertiary temperature and pressure reducer with vertical section intercommunication.
Preferably, the steam turbine is arranged at the running layer of the steam turbine generator unit with the horizontal height of 60-70 m.
Preferably, the vertical section is provided with a water replenishing port.
Preferably, the air cooling platform includes fan array and the radiating element array on upper portion of lower part, the exhaust steam pipeline supports on the radiating element array, the air cooling platform orientation one side of vertical section is provided with the orientation prevent wind the piece that the vertical section extends, prevent wind the piece and can block partially at least the air cooling platform with along vertical direction's air current between the vertical section.
Preferably, the wind guard includes a wind guard plate including an inclined portion having a first end connected to the air-cooling platform and a second end inclined downward with respect to the first end of the inclined portion, and a vertical portion connected to the second end of the inclined portion and extending downward.
Preferably, the wind guard includes a wind guard plate including a slope portion having a first end connected to the air-cooling platform and a second end inclined downward with respect to the first end of the slope portion, and a horizontal portion connected to the second end of the slope portion and extending toward the vertical section.
Preferably, the inclined portion is connected to a joint position of the fan array and the heat dissipation unit array.
Preferably, a vertical air duct is arranged in the heat dissipation unit array.
The utility model discloses cancelled original exhaust apparatus, but used exhaust steam pipe direct follow the steam extraction mouth of low pressure jar connects out, just so can solve exhaust apparatus and wholly raise the load and concentrate the problem that requires higher, can produce huge influence to the civil engineering structure to the layer height simultaneously.
In order to avoid overlong steam extraction pipeline of the low-pressure heater and other influences on a steam turbine and a steam exhaust pipeline, the low-pressure heater in the original exhaust device is directly moved into the steam exhaust pipeline, the system flow is more compact, and meanwhile, the space is greatly saved. The low-pressure heater adopts the sealing of sleeve pipe both ends to can not make the load transmit on the exhaust steam pipe. Meanwhile, the three-stage temperature and pressure reducing device is also directly moved into the steam exhaust pipeline, the steam can be rapidly cooled when the steam exhaust is started, and the system flow is compact.
Because the high-order back of arranging, the exhaust steam pipeline shortens, and the piping system becomes hard, simultaneously owing to adopt single low pressure cylinder steam turbine, the exhaust steam pipeline specification is bigger than conventional engineering, and does not have the exhaust steam device and absorbs thrust, and pipeline thrust will directly act on the low pressure jar through rigid connection. Therefore, the utility model discloses an absorb the displacement, reduce interface thrust and moment, adopt the compensator will vertical section with the horizontal segment is connected to unload thrust and moment as far as possible.
Drawings
FIG. 1 is a schematic structural diagram of a preferred embodiment of an air cooling exhaust system of a high-level layout steam turbine according to the present invention;
FIG. 2 is a schematic structural view of the steam exhaust pipeline of the present invention cooperating with the air cooling platform;
FIG. 3 is an enlarged view of a portion of the windbreak according to an embodiment of the present invention;
fig. 4 is an enlarged view of a portion of a wind guard according to another embodiment of the present invention.
Detailed Description
The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings. It is to be understood that the description of the embodiments herein is for purposes of illustration and explanation only and is not intended to limit the invention.
As shown in fig. 1 to 4, the air-cooled steam exhaust system of the high-position steam turbine of the present invention includes a boiler 10, a steam turbine, a steam exhaust pipeline 30, a low-pressure heater 40, a compensator 50 and an air-cooled platform 60; the steam turbine comprises a low-pressure cylinder 20, wherein the low-pressure cylinder 20 is provided with a steam exhaust port 201 and a steam extraction port 202; the steam exhaust pipeline 30 comprises a vertical section 301 and a horizontal section 302 which are communicated with each other; the steam outlet of the boiler 10 is arranged at the same height as the steam inlet of the steam turbine and is connected with the steam inlet of the steam turbine through a steam pipeline; the steam outlet 201 is directly communicated with one end of the vertical section 301, and the horizontal section 302 extends and passes through the air cooling platform 60 so that low-pressure steam forms condensed water; the compensator 50 extends horizontally, and two ends of the compensator 50 are respectively communicated with the vertical section 301 and the horizontal section 302; the low pressure heater 40 is at least partially disposed in the vertical section 301, and a portion of the low pressure heater 40 located in the vertical section 301 is provided with an inlet communicating with the steam extraction port 202.
Through the technical scheme, the utility model discloses cancelled original exhaust apparatus, but used exhaust pipe 30 directly to follow the steam vent 201 of low pressure cylinder 20 connects out, just so can solve the exhaust apparatus and wholly raise the load and concentrate the problem that requires higher, can produce huge influence to the civil engineering structure to the layer height simultaneously.
Because the high-order back of arranging, exhaust steam pipe 30 shortens, and the piping system becomes hard, simultaneously owing to adopt single low pressure cylinder steam turbine, exhaust steam pipe 30 specification is bigger than conventional engineering, and does not have the exhaust apparatus and absorbs thrust, and pipeline thrust will directly act on low pressure cylinder 20 through rigid connection. Therefore, the utility model discloses an absorb displacement, reduce interface thrust and moment, adopt compensator 50 will vertical section 301 with horizontal section 302 is connected to unload thrust and moment as far as possible.
In order to avoid the overlong steam extraction pipe of the low pressure heater 40 and other influences on the steam turbine and the steam exhaust pipe 30, preferably, both ends of the low pressure heater 40 extend out of the vertical section 301, and the low pressure heater 40 is sealed with the vertical section 301 through a sleeve, so that the load is not transmitted to the steam exhaust pipe 30. After the low-pressure steam entering the low-pressure heater 40 through the steam extraction port 202 performs work, the low-pressure steam is discharged to the next process flow through a pipe arranged at the end of the low-pressure heater 40.
In order to further save the space occupied by the equipment, preferably, the steam turbine comprises a high pressure cylinder, the high-position steam turbine air-cooling steam exhaust system comprises a three-stage temperature and pressure reducer 70 connected with a bypass of the high pressure cylinder, the three-stage temperature and pressure reducer 70 is at least partially arranged in the vertical section 301, and an outlet of the three-stage temperature and pressure reducer 70 is communicated with the vertical section 301. That is, the portion of the three-stage temperature and pressure reducer 70 including the outlet in the original exhaust apparatus is directly disposed in the vertical section 301, thereby greatly saving the installation space. In addition, the three-stage desuperheater 70 may direct the steam bypassed from the high pressure cylinder into the vertical section 301 of the exhaust.
Specifically, the steam turbine is arranged on a steam turbine generator unit operation layer with the horizontal height of 60-70m, the boiler 10 is arranged in a boiler workshop, the horizontal distance between the steam turbine generator unit operation layer and the air cooling platform 60 is 13.5-16 m, and the height of the air cooling platform 60 is 20m lower than that of the steam turbine generator unit operation layer.
In some cases, steam water may be lost due to leakage of the steam exhaust duct 30, and therefore, water is periodically replenished during the production process, and it is preferable that the vertical section 301 is provided with a water replenishing port 3011.
The steam is discharged through the steam outlet of the steam turbine after working in the steam turbine, that is, through the steam discharge pipeline 30, and the steam discharge pipeline 30 is supported on the heat dissipation unit array 602 of the air cooling platform 60, so that the steam discharge pipeline 30 and the steam therein are cooled by the air cooling platform 60. The heat dissipation unit array 602 includes a plurality of heat dissipation units with good thermal conductivity, and the heat dissipation units have a large heat dissipation area, and the heat of the exhaust duct 30 can be transferred to the heat dissipation units to expand the heat dissipation area and the heat dissipation efficiency. Specifically, the fan array 601 is disposed on the lower side of the heat dissipation unit array 602, that is, a heat dissipation airflow from the bottom to the top is formed by the fan array 601, that is, the airflow on the lower side of the fan array 601 is conveyed to the heat dissipation unit array 602 to perform air cooling heat dissipation on the heat dissipation unit array 602.
It should be noted that the steam inlet of the steam turbine is located at the top of the steam turbine and the steam outlet is located at the bottom, so that the height of the air cooling platform 60 is smaller than the height of the steam turbine unit operating floor. A horizontal interval is kept between the air cooling platform 60 and the running layer of the turbo generator unit, when the wind direction is approximately from the air cooling platform 60 to the running layer of the turbo generator unit (a certain angle can be formed with the direction), the airflow above the air cooling platform 60 is blocked and flows downwards after reaching the running layer of the turbo generator unit, so that the high-temperature airflow above the air cooling platform 60 flows to the vicinity of the fan array 601, namely, hot wind flows back to influence the heat dissipation capacity of the air cooling platform 60; when the wind direction was roughly when following turbo generator unit operation layer towards air cooling platform 60 (can form certain angle with this direction), because sheltering from of boiler workshop and turbo generator unit operation layer, it is unfavorable to be close to the partial radiating element array heat dissipation of turbo generator unit operation layer one side, hot-blast backward flow also can appear, influences the radiating effect.
Consequently, this scheme sets up in one side of air cooling platform 60 orientation turbo unit operation layer and prevent wind the piece, stops the air current at least partially through preventing wind and flows from the top to the bottom between air cooling platform 60 and turbo unit operation layer, avoids the air current of air cooling platform 60 upside to flow its downside, avoids hot-blast backward flow phenomenon to appear, guarantees that air cooling platform 60 has sufficient radiating efficiency.
As for the windbreak, various solid structures may be included as long as they can block the flow of the air stream.
According to a specific embodiment of the present invention, the wind-proof member includes the wind-proof plate 90, the wind-proof plate 90 includes an inclined portion 901 and a vertical portion 902, a first end of the inclined portion 901 is connected to the air cooling platform 60, a second end of the inclined portion 901 is inclined downward with respect to the first end of the inclined portion 901, and the vertical portion 902 is connected to the second end of the inclined portion 901 and extends downward. The wind guard includes a plate-shaped structure of the wind guard plate 90. The windshield 90 includes a slanted portion 901 that is inclined downward, and the slanted portion 901 is connected with a vertical portion 902 that extends downward, the slanted portion 901 being inclined in such a manner that the force acting on the air flow vertically downward can be weakened, and the vertical portion 902 can further protect the air-cooling platform 60 (particularly the fan array 601) and block the air flow having a higher temperature from flowing toward the air-cooling platform 60.
According to another embodiment of the present invention, the wind-proof element comprises a wind-proof plate 90, the wind-proof plate 90 comprises an inclined portion 901 and a horizontal portion 903, a first end of the inclined portion 901 is connected to the air cooling platform 60, a second end of the inclined portion 901 is inclined downward relative to the first end of the inclined portion 901, and the horizontal portion 903 is connected to the second end of the inclined portion 901 and extends toward the running layer of the turbo generator set. The wind guard includes a plate-shaped structure of the wind guard plate 90. The wind guard 90 includes an inclined portion 901 that is inclined downward, and the inclined portion 901 is connected with a horizontal portion 903 that extends toward the running layer of the turbo unit, the inclined portion 901 is inclined in such a manner that the force acting on the wind guard 90 from the vertical downward air flow can be weakened, and the horizontal portion 903 can increase the width of the wind guard 90 that is occupied between the air cooling platform 60 and the running layer of the turbo unit, and reduce the air flow that flows from the top downward, so that less high-temperature air flow reaches the fan array 601.
Further, the inclined portion 901 is connected to a joint position of the fan array 601 and the heat radiating unit array 602. The inclined portion 901 is connected to the joint position of the fan array 601 and the heat dissipating unit array 602, that is, the substantially planar interface between the fan array 601 and the heat dissipating unit array 602, that is, the wind-proof plate 90 protects the fan array 601, prevents the air flow with higher temperature on the air-cooling platform 60 from returning to the fan array 601, ensures that the air flow conveyed upwards by the fan array 601 has lower temperature, and ensures the heat dissipating capability of the air-cooling platform 60.
Further, a vertical air duct is disposed in the heat dissipation unit array 602. The fan array 601 is disposed at the lower side of the heat dissipation unit array 602, and can provide heat dissipation airflow from bottom to top to perform air cooling heat dissipation on the heat dissipation unit array 602, and therefore, a vertical air duct may be disposed in the heat dissipation unit array 602 to allow the heat dissipation airflow to smoothly pass through the heat dissipation unit array 602. The heat dissipation unit array 602 may include a plurality of sets of heat dissipation fins (i.e., heat dissipation units) that are in sufficient contact with the steam exhaust pipe 30 to receive heat of the steam exhaust pipe 30 by means of heat conduction, and the heat dissipation process may be performed indirectly on the steam exhaust pipe 30 by performing an air cooling process on the heat dissipation unit array 602.
The utility model discloses a high-order steam turbine air cooling exhaust system of arranging makes each floor height of steam turbine factory building set up more rationally, can adapt to the collection of whole factory drainage and condensate water, has also solved the big problem of steam extraction device and steam extraction pipeline resistance simultaneously. Meanwhile, the problems of unbalanced vacuum suction force of the steam turbine, large thrust of a low-pressure cylinder interface and large displacement after deflection are solved.
The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited thereto. In the technical idea scope of the present invention, it is possible to provide a solution of the present invention with a plurality of simple modifications to avoid unnecessary repetition, and the present invention is not described separately for various possible combinations. These simple variations and combinations should also be considered as disclosed in the present invention, all falling within the scope of protection of the present invention.
Claims (10)
1. The air-cooled steam exhaust system of the high-position arranged steam turbine is characterized by comprising a boiler (10), the steam turbine, a steam exhaust pipeline (30), a low-pressure heater (40), a compensator (50) and an air-cooled platform (60);
the steam turbine comprises a low pressure cylinder (20), wherein the low pressure cylinder (20) is provided with a steam outlet (201) and a steam extraction opening (202);
the steam exhaust pipeline (30) comprises a vertical section (301) and a horizontal section (302) which are communicated with each other;
the steam outlet of the boiler (10) is arranged at the same height as the steam inlet of the steam turbine and is connected with the steam inlet of the steam turbine through a steam pipeline;
the steam outlet (201) is directly communicated with one end of the vertical section (301), and the horizontal section (302) extends and passes through the air cooling platform (60) so that low-pressure steam forms condensed water;
the compensator (50) extends horizontally, and two ends of the compensator (50) are respectively communicated with the vertical section (301) and the horizontal section (302);
the low-pressure heater (40) is at least partially arranged in the vertical section (301), and the part of the low-pressure heater (40) in the vertical section (301) is provided with an inlet communicated with the steam extraction port (202).
2. An air-cooled steam exhaust system of a high-level steam turbine according to claim 1, characterized in that both ends of the low-pressure heater (40) extend out of the vertical section (301), and the low-pressure heater (40) is sealed with the vertical section (301) by a sleeve.
3. An air-cooled steam exhaust system of a high-level arranged steam turbine according to claim 1, characterized in that the steam turbine comprises a high-pressure cylinder, the air-cooled steam exhaust system of the high-level arranged steam turbine comprises a three-level temperature and pressure reducer (70) connected with the high-pressure bypass, the three-level temperature and pressure reducer (70) is at least partially arranged in the vertical section (301), and the outlet of the three-level temperature and pressure reducer (70) is communicated with the vertical section (301).
4. An air-cooled steam exhaust system of a high-position steam turbine according to claim 1, wherein the steam turbine is disposed in an operation layer of a steam turbine generator unit having a horizontal height of 60m to 70 m.
5. An air-cooled steam exhaust system of a high-level steam turbine according to claim 1, characterized in that the vertical section (301) is provided with a water replenishing port (3011).
6. An air-cooled steam exhaust system of an overhead steam turbine according to claim 1, wherein the air-cooled platform (60) comprises a lower fan array (601) and an upper heat dissipating unit array (602), the steam discharging duct (30) is supported on the heat dissipating unit array (602), and a wind prevention member extending toward the vertical section (301) is provided on one side of the air-cooled platform (60) toward the vertical section (301), and the wind prevention member is capable of at least partially blocking the air flow in the vertical direction between the air-cooled platform (60) and the vertical section (301).
7. An air-cooled steam exhaust system of a high-altitude steam turbine according to claim 6, characterized in that the wind shield comprises a wind shield plate (90), the wind shield plate (90) comprises an inclined portion (901) and a vertical portion (902), a first end of the inclined portion (901) is connected to the air-cooled platform (60), a second end of the inclined portion (901) is inclined downward with respect to the first end of the inclined portion (901), and the vertical portion (902) is connected to the second end of the inclined portion (901) and extends downward.
8. An air-cooled steam exhaust system of a high-mounted steam turbine according to claim 6, characterized in that the wind break comprises a windbreak plate (90), the windbreak plate (90) comprising an inclined portion (901) and a horizontal portion (903), a first end of the inclined portion (901) being connected to the air-cooled platform (60), a second end of the inclined portion (901) being inclined downwards relative to the first end of the inclined portion (901), the horizontal portion (903) being connected to the second end of the inclined portion (901) and extending towards the vertical section (301).
9. An air-cooled steam exhaust system of a high-position steam turbine according to claim 7 or 8, characterized in that the inclined part (901) is connected to the joint position of the fan array (601) and the heat dissipation unit array (602).
10. The air-cooled steam exhaust system of an overhead steam turbine according to claim 6, wherein the heat dissipation unit array (602) is provided with vertical air ducts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920729204.7U CN210087411U (en) | 2019-05-20 | 2019-05-20 | Air cooling steam exhaust system of high-position arranged steam turbine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920729204.7U CN210087411U (en) | 2019-05-20 | 2019-05-20 | Air cooling steam exhaust system of high-position arranged steam turbine |
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| CN210087411U true CN210087411U (en) | 2020-02-18 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114934818A (en) * | 2022-05-25 | 2022-08-23 | 西安热工研究院有限公司 | High-position unit, high-position unit operation method and high-position steam turbine system |
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2019
- 2019-05-20 CN CN201920729204.7U patent/CN210087411U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114934818A (en) * | 2022-05-25 | 2022-08-23 | 西安热工研究院有限公司 | High-position unit, high-position unit operation method and high-position steam turbine system |
| CN114934818B (en) * | 2022-05-25 | 2023-09-01 | 西安热工研究院有限公司 | High-level unit, high-level unit operation method and high-level steam turbine system |
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