CN103032118B - Steam exhaust device of steam turbine - Google Patents
Steam exhaust device of steam turbine Download PDFInfo
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- CN103032118B CN103032118B CN201210563988.3A CN201210563988A CN103032118B CN 103032118 B CN103032118 B CN 103032118B CN 201210563988 A CN201210563988 A CN 201210563988A CN 103032118 B CN103032118 B CN 103032118B
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Abstract
The invention provides a steam exhaust device of a steam turbine. The steam exhaust device comprises a steam exhaust device casing, wherein the steam exhaust device casing is provided with a steam inlet and a steam outlet, a steam exhaust main flow passage is formed between the steam inlet and the steam outlet, the seam inlet is connected with a steam exhaust cylinder of a low-pressure cylinder of the steam turbine, a deoxygenation spray nozzle is arranged in the steam exhaust main flow passage, and the deoxygenation spray nozzle is connected with a condensed water return pipeline of an air-cooling condenser and can spray condensed water return water of the air-cooling condenser in the steam exhaust main flow passage. The steam exhaust device of the steam turbine has the advantages that the deoxygenation spray nozzle is arranged in the steam exhaust main flow passage, the condensed water sprayed by the deoxygenation spray nozzle is in full contact with steam in the steam exhaust main flow passage, the condensed water with the supercooling degree becomes saturated condensed water after heat exchange with the steam, meanwhile, dissolved oxygen in the condensed water is dissolved out, the dissolved oxygen is exhausted along with the exhausted steam from a steam exhaust opening, and further, the dissolved oxygen quantity in the steam condensed water is reduced. According to the deoxygenation scheme, the steam turbine is adopted for exhausting steam to directly exchange heat with the condensed water, the heating effect of the supercooling condensed water is improved, and the dissolved oxygen quantity of the condensed water can be effectively reduced.
Description
Technical field
The present invention relates to the auxiliary device of direct air-cooling turbine, particularly relate to a kind of steam exhaust device used on direct air-cooling turbine.
Background technology
Along with the fast development of China's power industry, in the large quantities of air cooling power station of regional Construction of China rich coal lack of water, air cooling power station mainly adopts direct air-cooling turbine to generate electricity.Direct air-cooling turbine blow-off line distance, the resistance of ducting are large, the area of air cooling tubes condenser greatly, relatively greatly blank, make the oxygen content of condensate severe overweight of air cooling tubes condenser, certain corrosion will be caused like this to e-quipment and pipe, the resistance of ducting greatly then can cause condensate undercooling to increase, and the economy of unit so also can be made to reduce.For this reason, the air cooling system of steam turbine all can configure the steam exhaust device with condensate water heating and deaerating plant.
The function of steam exhaust device is: the blow-off line 1) connecting steam turbine and air cooling tubes condenser; 2) as condensate water, the chemical water supplementing water of air cooling tubes condenser, the water tank that low-pressure heater is hydrophobic; 3) thrust that steam turbine reduces air cooling tubes condenser blow-off line is stablized.In order to reduce the resistance of blow-off line, the volume of steam exhaust device is larger, in order to make full use of the inner space of steam exhaust device, prior art arranges a deflector in steam exhaust device, steam exhaust device inner space is divided into upper right and lower-left two parts, at the deaerating plant that the lower-left spatial placement of steam exhaust device is special, and the steam that turbine low pressure cylinder is discharged is caused space, lower-left, steam is directly contacted with deaerating plant, steam and deaerating plant is made to carry out exchange heat, subcooled condensation water is heated to saturated, so just effectively can reduces the oxygen content in condensate water.
But in actual use, the space, lower-left of the steam exhaust device be separated out due to deflector is a relatively airtight space, gas circulating resistance is comparatively large, and flow is less, will cause adverse effect like this to the heating of condensate water and deaerating effect.
Summary of the invention
The shortcoming of prior art in view of the above, the object of the present invention is to provide a kind of steam exhaust device of steam turbine improving heat transfer effect, reduce steam condensate oxygen content.
For achieving the above object and other relevant objects, the invention provides a kind of steam exhaust device of steam turbine, comprise the steam exhaust device housing being provided with air intake and venthole, steam discharge sprue is formed between described air intake and described venthole, described air intake is connected with the exhaust casing of turbine low pressure cylinder, the deaerating nozzle of large discharge is provided with in described steam discharge sprue, described deaerating nozzle is connected with the water return pipeline of air cooling tubes condenser, and described deaerating nozzle can spray air cooling tubes condenser coagulation hydroenergy backwater in steam discharge sprue.
Preferably, described steam exhaust device housing bottom is provided with the centre pilot groove of four rectangular distributions, and the ground of described steam exhaust device housing is provided with four location-plates, and described four location-plates lay respectively in four centre pilot grooves.
Preferably, the low pressure (LP) cylinder of described steam exhaust device housing and this steam turbine is rigidly connected, and the outer shell of described steam exhaust device housing to described low pressure (LP) cylinder supports.
Preferably, described steam exhaust device housing is arranged on one and organizes a performance on plate, and described platen is provided with lubricant grease runner.
Preferably, be provided with inner extraction steam pipe in described steam exhaust device housing, the air intake of described inner extraction steam pipe is connected by double wave expansion joint with between turbine low pressure cylinder extraction steam pipe.
As mentioned above, steam exhaust device of steam turbine of the present invention has following beneficial effect: deaerating nozzle is arranged in steam discharge sprue by this steam exhaust device of steam turbine, the condensate water that deaerating nozzle sprays fully contacts with the steam by steam discharge sprue, saturated condensate water is become with after the condensate water of degree of supercooling and steam heat-exchanging, make the dissolved oxygen in condensate water separate out simultaneously,, the oxygen of precipitation is discharged from steam drain with steam discharge, and then the dissolved oxygen amount in condensate water is reduced.This deoxygenation scheme adopts turbine discharge and condensate water direct heat transfer, improves the heating effect of subcooled condensation water, effectively can reduce the dissolved oxygen amount of condensate water.
Accompanying drawing explanation
Fig. 1 is the structural representation of the embodiment of the present invention.
Fig. 2 is the structural representation that the embodiment of the present invention is connected with turbine low pressure cylinder.
Fig. 3 is the structural representation of embodiment of the present invention steam exhaust device of steam turbine platen.
Element numbers explanation
Detailed description of the invention
By particular specific embodiment, embodiments of the present invention are described below, person skilled in the art scholar the content disclosed by this description can understand other advantages of the present invention and effect easily.
Refer to Fig. 1 to Fig. 3.Notice, structure, ratio, size etc. that this description institute accompanying drawings illustrates, content all only in order to coordinate description to disclose, understand for person skilled in the art scholar and read, and be not used to limit the enforceable qualifications of the present invention, therefore the not technical essential meaning of tool, the adjustment of the modification of any structure, the change of proportionate relationship or size, do not affecting under effect that the present invention can produce and the object that can reach, still all should drop on disclosed technology contents and obtain in the scope that can contain.Simultaneously, quote in this description as " on ", D score, "left", "right", " centre " and " one " etc. term, also only for ease of understanding of describing, and be not used to limit the enforceable scope of the present invention, the change of its relativeness or adjustment, under changing technology contents without essence, when being also considered as the enforceable category of the present invention.
As shown in Figure 1, 2, 3, the invention provides a kind of steam exhaust device of steam turbine, this steam exhaust device of steam turbine comprises a steam exhaust device housing 1, and steam exhaust device housing 1 is provided with air intake 2 and venthole 3, forms steam discharge sprue 4 between air intake 2 and venthole 3.Air intake 2 is connected with the exhaust casing of turbine low pressure cylinder 6, and venthole 3 is connected with Air-Cooling Island, and the steam that turbine low pressure cylinder is discharged enters Air-Cooling Island cooling through steam discharge sprue 4.In steam discharge sprue 4, be provided with deaerating nozzle 5, deaerating nozzle 5 is large discharge nozzle, and deaerating nozzle 5 is connected with air cooling tubes condenser water return pipeline, and deaerating nozzle 5 can spray condensate water in steam discharge sprue.Be provided with U-shaped return flume bottom steam exhaust device housing 1 deflector, the condensate water after heat exchange is got back in the condensate tank of steam exhaust device lower housing portion through U-shaped groove.
This steam exhaust device of steam turbine in use, the steam of being discharged by turbine low pressure cylinder is by steam discharge sprue 4, meanwhile deaerating nozzle 5 sprays a large amount of condensate water in steam discharge sprue 4, the condensate water of spraying fully contacts with steam, condensate water with degree of supercooling is heated to be saturation water by steam, make the oxygen evolution be dissolved in condensate water, the oxygen of precipitation can enter Air-Cooling Island with steam discharge simultaneously, is extracted out by Air-Cooling Island bleeding point to reach deaerating effect.
Steam exhaust device housing 1 and turbine low pressure cylinder 6 rigid solder, steam exhaust device housing 1 can support the outer shell of low pressure (LP) cylinder 6, so just be provided with cylinder compensator 7 without the need to arranging on turbine low pressure cylinder 6 again between support, the inner casing of low pressure (LP) cylinder 6 and outer shell, cylinder compensator 7 is for compensating the swollen difference between interior outer shell, therefore the expansion joint connecting steam exhaust device housing 1 and turbine low pressure cylinder 6 need not be set again, the manufacturing cost of steam turbine can be reduced like this.
The bottom of steam exhaust device housing 1 is provided with one and organizes a performance plate 10, platen 10 is provided with lubricant grease runner 11.Because the outer shell of steam exhaust device housing 1 and turbine low pressure cylinder 6 is for being rigidly connected, the outer shell of low pressure (LP) cylinder 6 is supported by steam exhaust device, therefore the frictional resistance of platen 10 and the Turbine Engine Foundation of steam exhaust device housing 1 comparatively conventional power unit greatly increase, on platen 10, the lubricant grease runner of design can carry out oil addition to reduce steam exhaust device and basic frictional resistance before unit puts into operation and in putting into operation, and ensures the smooth thermal expansion of steam exhaust device and lp outer casing.
The bottom of steam exhaust device housing 1 is provided with the centre pilot groove of four rectangular distributions, the ground of steam exhaust device housing 1 is provided with four location-plates, four location-plates lay respectively in four centre pilot grooves, can determine the horizontal and vertical expansion dead point of steam exhaust device and steam turbine exhaust casing like this.
This steam exhaust device housing 1 top and turbine low pressure cylinder 6 adopt and are rigidly connected, without expansion joint, also rigid support is adopted with Turbine Engine Foundation bottom it, steam turbine low-pressure outer shell load is born by steam exhaust device, and its lateral expansion dead point is also realized by the centre pilot groove arranged bottom steam exhaust device housing 1.In order to absorb vertical, the horizontal two-way thermal walking of low pressure (LP) cylinder extraction steam pipe 8, double wave expansion joint 9 being set and being connected with extraction steam pipe 8.
This steam exhaust device of steam turbine is applicable on vapour extra-supercritical unit, compensate for the blank of vapour in air cooling extra-supercritical unit field.Deaerating nozzle is arranged in steam discharge sprue by this steam exhaust device of steam turbine, the condensate water that deaerating nozzle sprays fully can contact with the steam by steam discharge sprue, reduce condensate undercooling, make the oxygen evolution be dissolved in condensate water simultaneously, the oxygen of separating out can be discharged from steam drain with steam discharge, and the dissolved oxygen amount in condensate water is reduced.This deoxygenation scheme adopts turbine discharge and condensate water direct heat transfer, improves the heating effect of subcooled condensation water, effectively can reduce degree of supercooling and the dissolved oxygen amount of condensate water.Simultaneously this steam exhaust device of steam turbine also have structure simple, be easy to realize, manufacture cost and other advantages.So the present invention effectively overcomes various shortcoming of the prior art and tool high industrial utilization.
Above-described embodiment is illustrative principle of the present invention and effect thereof only, but not for limiting the present invention.Any person skilled in the art scholar all without prejudice under spirit of the present invention and category, can modify above-described embodiment or changes.Therefore, such as have in art usually know the knowledgeable do not depart from complete under disclosed spirit and technological thought all equivalence modify or change, must be contained by claim of the present invention.
Claims (3)
1. a steam exhaust device of steam turbine, comprise the steam exhaust device housing being provided with air intake and venthole, steam discharge sprue is formed between described air intake and described venthole, described air intake is connected with the exhaust casing of turbine low pressure cylinder, it is characterized in that: the deaerating nozzle being provided with large discharge in described steam discharge sprue, described deaerating nozzle is connected with the water return pipeline of air cooling tubes condenser, described deaerating nozzle can spray air cooling tubes condenser coagulation hydroenergy backwater in steam discharge sprue, condensate tank is provided with in described steam exhaust device lower housing portion, the low pressure (LP) cylinder of described steam exhaust device housing and this steam turbine is rigidly connected, the outer shell of described steam exhaust device housing to described low pressure (LP) cylinder supports, described steam exhaust device housing is arranged on one and organizes a performance on plate, described platen is provided with lubricant grease runner.
2. steam exhaust device of steam turbine according to claim 1, it is characterized in that: described steam exhaust device housing bottom is provided with the centre pilot groove of four rectangular distributions, the ground of described steam exhaust device housing is provided with four location-plates, and described four location-plates lay respectively in four centre pilot grooves.
3. steam exhaust device of steam turbine according to claim 1, is characterized in that: be provided with inner extraction steam pipe in described steam exhaust device housing, and the air intake of described inner extraction steam pipe is connected by double wave expansion joint with between turbine low pressure cylinder extraction steam pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210563988.3A CN103032118B (en) | 2012-12-21 | 2012-12-21 | Steam exhaust device of steam turbine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210563988.3A CN103032118B (en) | 2012-12-21 | 2012-12-21 | Steam exhaust device of steam turbine |
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| Publication Number | Publication Date |
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| CN103032118A CN103032118A (en) | 2013-04-10 |
| CN103032118B true CN103032118B (en) | 2015-03-25 |
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| CN201210563988.3A Active CN103032118B (en) | 2012-12-21 | 2012-12-21 | Steam exhaust device of steam turbine |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103758590B (en) * | 2014-01-24 | 2015-06-17 | 上海电气电站设备有限公司 | Novel low-pressure-cylinder steam-discharging-pipe deoxygenization structure of direct air-cooling unit |
| CN106761974B (en) * | 2016-12-23 | 2019-03-29 | 东方电气集团东方汽轮机有限公司 | A kind of steam turbine low-pressure cylinder structure |
| CN108980814A (en) * | 2017-06-02 | 2018-12-11 | 新疆知信科技有限公司 | Air cooling unit condensed water physics deoxidation method and device |
| CN115773162A (en) * | 2022-12-02 | 2023-03-10 | 东方电气集团东方汽轮机有限公司 | Water replenishing and deoxidizing structure of steam exhaust device and water replenishing and deoxidizing method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2530042Y (en) * | 2002-04-05 | 2003-01-08 | 东方汽轮机厂 | Direct air cooling turbine steam exhauster for power station |
| CN2547877Y (en) * | 2002-06-07 | 2003-04-30 | 王东曦 | Bearing box supporting device for steam turbine |
| CN2911191Y (en) * | 2006-06-07 | 2007-06-13 | 杨驭 | Integrated steam exhauster of air cooling turbine |
| CN200978685Y (en) * | 2006-12-11 | 2007-11-21 | 哈尔滨汽轮机厂辅机工程有限公司 | Energy-saving discharge device with built-in heat exchanger |
| CN101435348A (en) * | 2008-12-13 | 2009-05-20 | 东方电气集团东方汽轮机有限公司 | Air cooling steam turbine steam discharge apparatus built-in with deoxidization apparatus |
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2012
- 2012-12-21 CN CN201210563988.3A patent/CN103032118B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2530042Y (en) * | 2002-04-05 | 2003-01-08 | 东方汽轮机厂 | Direct air cooling turbine steam exhauster for power station |
| CN2547877Y (en) * | 2002-06-07 | 2003-04-30 | 王东曦 | Bearing box supporting device for steam turbine |
| CN2911191Y (en) * | 2006-06-07 | 2007-06-13 | 杨驭 | Integrated steam exhauster of air cooling turbine |
| CN200978685Y (en) * | 2006-12-11 | 2007-11-21 | 哈尔滨汽轮机厂辅机工程有限公司 | Energy-saving discharge device with built-in heat exchanger |
| CN101435348A (en) * | 2008-12-13 | 2009-05-20 | 东方电气集团东方汽轮机有限公司 | Air cooling steam turbine steam discharge apparatus built-in with deoxidization apparatus |
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| CN103032118A (en) | 2013-04-10 |
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