CN108917418B - Concurrent tube bundle vacuumizing device for air cooling island - Google Patents
Concurrent tube bundle vacuumizing device for air cooling island Download PDFInfo
- Publication number
- CN108917418B CN108917418B CN201810868078.3A CN201810868078A CN108917418B CN 108917418 B CN108917418 B CN 108917418B CN 201810868078 A CN201810868078 A CN 201810868078A CN 108917418 B CN108917418 B CN 108917418B
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- China
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- air cooling
- cooling island
- water tank
- vacuumizing
- condensation water
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- 238000001816 cooling Methods 0.000 title claims abstract description 40
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 52
- 230000005494 condensation Effects 0.000 claims abstract description 17
- 238000009833 condensation Methods 0.000 claims abstract description 17
- 238000000926 separation method Methods 0.000 claims description 8
- 238000005086 pumping Methods 0.000 abstract description 5
- 239000007789 gas Substances 0.000 description 11
- 238000007710 freezing Methods 0.000 description 2
- 230000008014 freezing Effects 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000004781 supercooling Methods 0.000 description 1
Abstract
The invention relates to a concurrent tube bundle vacuumizing device of an air cooling island, belonging to the field of air cooling heat exchange; the technical problem to be solved is to provide an air cooling island concurrent tube bundle vacuumizing device for reducing the back pressure of a direct air cooling system and improving the working efficiency of an air cooling condenser; the technical scheme adopted for solving the technical problems is as follows: the air cooling island comprises a steam distributing pipe, an inlet of a downstream pipe bundle is communicated with the lower end of the steam distributing pipe, an outlet of the downstream pipe bundle is connected with a condensation water tank, the condensation water tank is a hollow cylinder, the upper semi-diameter of the condensation water tank is gradually increased from the middle to two ends, the edge of the condensation water tank is raised, an air chamber is formed inside the condensation water tank, and the vacuum pumping device is communicated with the top of the air chamber of the condensation water tank and is used for pumping out uncondensed steam and uncondensable gas in the air chamber.
Description
Technical Field
The invention relates to an air cooling island concurrent tube bundle vacuumizing device, and belongs to the technical field of air cooling heat exchange.
Background
The direct air cooling power plant built in the northern 'coal-rich water-deficient' area is easy to cause serious dust accumulation of the heat dissipation tube bundles of the air cooling condenser, and the cold climate in winter can also cause the frost cracking phenomenon of the heat dissipation tube bundles to occur in the design of the air cooling system.
At present, although the concurrent tube bundle of the air-cooling condenser is a main component for condensing steam, most of steam can be condensed, and the countercurrent tube bundle of the air-cooling condenser has the function of exhausting air and non-condensable gas in the system, certain parts of the concurrent tube bundle of the air-cooling condenser still can generate a low flow velocity area or even form a dead zone when in operation, and the concurrent tube bundle of the air-cooling condenser is frozen at a low temperature.
Disclosure of Invention
The invention provides an air cooling island concurrent tube bundle vacuumizing device, which overcomes the defects existing in the prior art and reduces the back pressure of a direct air cooling system and improves the working efficiency of an air cooling condenser.
In order to solve the technical problems, the invention adopts the following technical scheme: the utility model provides an air cooling island concurrent flow tube bank evacuating device, includes air cooling island and evacuating device, and the air cooling island includes the steam distribution pipe, and concurrent flow tube bank's entry is linked together with steam distribution pipe's lower extreme, and concurrent flow tube bank's export links to each other with the condensate tank, and the condensate tank is the cavity cylinder, and the last semi-diameter of condensate tank is gradually increased from the centre to both ends, causes the edge to protruding, and its inside air chamber that forms, evacuating device is linked together with the air chamber top of condensate tank for with the unset steam and the noncondensable gas in the air chamber take out.
Further, the vacuumizing device comprises a second water ring vacuum pump and a collecting device, and the air chamber is sequentially communicated with the second water ring vacuum pump and the collecting device through vacuumizing pipelines.
Further, the vacuumizing device further comprises a vacuum gauge, a gas-water separation tank and an exhaust valve, the valve is arranged on a vacuumizing pipeline connected with the tail end of the air chamber, and the vacuum gauge, the second water ring vacuum pump, the gas-water separation tank, the exhaust valve and the collecting device are sequentially arranged at the rear end of the valve.
Further, the section of the condensing unit of the air cooling island is of an A-shaped structure, a countercurrent tube bundle is further arranged on the wall surfaces of the two sides of the air cooling island, and the upper end of the countercurrent tube bundle is communicated with the first water ring vacuum pump.
Further, the collecting device is connected with the drainage well through a pipeline, and the collecting device discharges the collected condensed water into the drainage well.
Compared with the prior art, the invention has the following beneficial effects: according to the invention, some steam and non-condensable gas in the countercurrent tube bundle of the air-cooled condenser can be pumped away, so that the back pressure of a direct air-cooled system is reduced while the flow of the steam in the tube is accelerated and freezing is avoided, and the working efficiency of the air-cooled condenser is improved.
Drawings
Fig. 1 is a schematic side view of an embodiment of the present invention.
Fig. 2 is a schematic perspective view of an embodiment of the present invention.
Fig. 3 is a schematic structural diagram of a vacuum pumping apparatus according to an embodiment of the present invention.
In the figure, a 1-turbine, a 2-exhaust pipeline, a 3-steam distribution pipe, a 4-forward pipe bundle, a 5-backward pipe bundle, a 6-first water ring vacuum pump, a 7-condensate tank, an 8-downcomer, a 9-condensate pump, a 10-vacuumizing device, a 11-vacuumizing pipeline, a 12-valve, a 13-vacuum gauge, a 14-three-way joint, a 15-gas-water separation tank, a 16-exhaust valve, a 17-collecting device and a 18-second water ring vacuum pump.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
As shown in fig. 1 and 2, the downstream tube bundle vacuumizing device of the air cooling island comprises the air cooling island and a vacuumizing device 10, the air cooling island comprises a steam distributing tube 3, an inlet of the downstream tube bundle 4 is communicated with the lower end of the steam distributing tube 3, an outlet of the downstream tube bundle 4 is connected with a condensation water tank 7, the condensation water tank 7 is a hollow cylinder, the upper half diameter of the condensation water tank 7 is gradually increased from the middle to two ends to cause edge bulge, an air chamber is formed in the air cooling island, and the vacuumizing device 10 is communicated with the top of the air chamber of the condensation water tank 7 and is used for pumping non-condensed steam and non-condensable gas in the air chamber. The condensing water tank 7 is specially designed, and is different from a common air cooling island, the upper half pipe diameter of the water tank is slowly increased until the tail end of the water tank is protruded at the edge to form an air chamber, so that the vacuum pumping device 10 can conveniently pump out non-condensing gas.
The section of the condensing unit of the air cooling island is of an A-shaped structure, countercurrent tube bundles 5 are further arranged on the wall surfaces on two sides of the air cooling island, and the upper ends of the countercurrent tube bundles 5 are communicated with a first water ring vacuum pump 6.
As shown in fig. 3, the vacuumizing device 10 comprises a second water ring vacuum pump 18, a collecting device 17, a vacuum gauge 13, a gas-water separation tank 15 and an exhaust valve 16, wherein a valve 12 is arranged on a vacuumizing pipeline 11 connected with the tail end of the air chamber, and the rear end of the valve 12 is sequentially provided with the vacuum gauge 13, the second water ring vacuum pump 18, the gas-water separation tank 15, the exhaust valve 16 and the collecting device 17. The vacuum gauge 13 needs to be mounted on the tee 14.
The exhaust pipe 11 adopted by the whole vacuumizing device 10 is a pipeline with the pipe diameter phi of 10 mm-phi of 20mm, and the second water ring vacuum pump 18 can vacuumize the concurrent pipe bundle 4. When the vacuum gauge is used, the valve 12 and the exhaust valve 16 are opened, the second water ring vacuum pump 18 pumps the non-condensed steam and the non-condensable gas at the tail end of the downstream tube bundle through the vacuumizing pipeline 11, the pumped condensed water and the gas are respectively treated through the gas-water separation tank 15, the water is collected into the collecting device 17, the gas is discharged through the exhaust valve 16, when the vacuum gauge 13 displays a set negative pressure, the second water ring vacuum pump 18 is closed, the valve 12 and the exhaust valve 16 are closed, and the whole vacuumizing process is completed. In practice, the collecting device 17 may also be connected to a drainage well by a pipe, and the collecting device 17 flows the collected condensate into the drainage well for secondary use.
The steam discharged by the steam turbine 1 enters the concurrent tube bundle 4 from top to bottom along the steam discharge pipeline 2 and the steam distribution pipe 3, most of the steam is condensed in the concurrent tube bundle 4, and the condensed water flows in the same direction as the steam. Meanwhile, as the connecting pipeline between the concurrent tube bundle 4 and the counter-current tube bundle is provided with a certain angle, the vapor which is not condensed fully has enough space and time to be condensed fully, and the vapor which is not condensed and the non-condensable gas can be pumped out through the vacuumizing device 10 at the tail end of the concurrent tube bundle 4 after the time, so that the cooling efficiency is improved. The remaining non-condensed steam carries non-condensable gases into the counter-current tube bundle 5. In the countercurrent tube bundle 5, steam flows from bottom to top to be totally condensed, condensed water flows from top to bottom into the bottom condensation tank 7 under the action of gravity, and the condensed water flowing into the condensation tank 7 is pumped out by the action of the condensation pump 9 through the down pipe 8. Because the steam and the condensed water flow reversely, the phenomenon of supercooling and freezing of the condensed water does not occur in the countercurrent tube bundle, and the non-condensable gas is pumped and discharged by the water ring vacuum pump 6 at the upper part of the countercurrent tube bundle 5.
While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the following claims.
Claims (2)
1. An air cooling island concurrent tube bank evacuating device which is characterized in that: the device comprises an air cooling island and a vacuumizing device (10), wherein the air cooling island comprises a steam distribution pipe (3), an inlet of a concurrent pipe bundle (4) is communicated with the lower end of the steam distribution pipe (3), an outlet of the concurrent pipe bundle (4) is connected with a condensation water tank (7), the condensation water tank (7) is a hollow cylinder, the upper semi-diameter of the condensation water tank (7) is gradually increased from the middle to two ends to cause edge bulge, an air chamber is formed in the air cooling island, and the vacuumizing device (10) is communicated with the top of the air chamber of the condensation water tank (7) and is used for extracting non-condensed steam and non-condensable gas in the air chamber;
The vacuumizing device (10) comprises a second water ring vacuum pump (18) and a collecting device (17), and the air chamber is sequentially communicated with the second water ring vacuum pump (18) and the collecting device (17) through vacuumizing pipelines (11);
The vacuumizing device (10) further comprises a vacuum gauge (13), a gas-water separation tank (15) and an exhaust valve (16), the valve (12) is arranged on a vacuumizing pipeline (11) connected with the tail end of the air chamber, and the vacuum gauge (13), the second water ring vacuum pump (18), the gas-water separation tank (15), the exhaust valve (16) and the collecting device (17) are sequentially arranged at the rear end of the valve (12);
the section of the condensing unit of the air cooling island is of an A-shaped structure, countercurrent tube bundles (5) are further arranged on the wall surfaces of the two sides of the air cooling island, and the upper ends of the countercurrent tube bundles (5) are communicated with a first water ring vacuum pump (6).
2. The downstream tube bundle vacuumizing device for the air cooling island according to claim 1, wherein the collecting device (17) is connected with the drainage well through a pipeline, and the collecting device (17) discharges the collected condensed water into the drainage well.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810868078.3A CN108917418B (en) | 2018-08-02 | Concurrent tube bundle vacuumizing device for air cooling island |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810868078.3A CN108917418B (en) | 2018-08-02 | Concurrent tube bundle vacuumizing device for air cooling island |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108917418A CN108917418A (en) | 2018-11-30 |
| CN108917418B true CN108917418B (en) | 2024-07-05 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5787970A (en) * | 1994-12-06 | 1998-08-04 | Larinoff; Michael W. | Air-cooled vacuum steam condenser with mixed flow bundle |
| CN2924455Y (en) * | 2006-07-04 | 2007-07-18 | 江苏双良空调设备股份有限公司 | Direct air-cooling condensator tube bundles |
| CN203717048U (en) * | 2013-12-17 | 2014-07-16 | 上海雷林工程技术有限公司 | Plate-type evaporation air cooling system |
| CN209027320U (en) * | 2018-08-02 | 2019-06-25 | 山西大学 | A kind of Air-Cooling Island fair current tube bank vacuum evacuation device |
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5787970A (en) * | 1994-12-06 | 1998-08-04 | Larinoff; Michael W. | Air-cooled vacuum steam condenser with mixed flow bundle |
| CN2924455Y (en) * | 2006-07-04 | 2007-07-18 | 江苏双良空调设备股份有限公司 | Direct air-cooling condensator tube bundles |
| CN203717048U (en) * | 2013-12-17 | 2014-07-16 | 上海雷林工程技术有限公司 | Plate-type evaporation air cooling system |
| CN209027320U (en) * | 2018-08-02 | 2019-06-25 | 山西大学 | A kind of Air-Cooling Island fair current tube bank vacuum evacuation device |
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