CN201583155U - Steam exhaust air condenser for steam turbine - Google Patents
Steam exhaust air condenser for steam turbine Download PDFInfo
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- CN201583155U CN201583155U CN200920082611XU CN200920082611U CN201583155U CN 201583155 U CN201583155 U CN 201583155U CN 200920082611X U CN200920082611X U CN 200920082611XU CN 200920082611 U CN200920082611 U CN 200920082611U CN 201583155 U CN201583155 U CN 201583155U
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Abstract
The utility model provides a steam exhaust air condenser for a steam turbine, which belongs to the field of heat exchanging. The utility model particularly relates to an air cooler for a power station, which adopts air as a cooling medium. As the northern part of China is usually windy and dusty throughout the year, the air cooler for the power station has the problems of easy accumulation of sand dust, high heat/power consumption and poor wind resisting capability. The cylindrical air condenser which carries out direct air cooling adopts a round fin as a core element, which can greatly reduce deposition of the sand dust. After cold air is blown into a pipe bundle of the air cooler for heat exchanging under the action of natural wind, the air condenser sucks the cold air outside the pipe bundle by utilizing draft generated by hot air in a wind cylinder, thereby solving the problem that environmental wind affects the direct air-cooling running stability of the present power station at the same time as realizing natural ventilating and cooling of the direct air cooler for the power station.
Description
Technical field
The utility model belongs to the heat exchange field, particularly is the power station air cooling apparatus of cooling medium with the air.
Background technology
Because the worsening shortages of water resource utilizes air to pass through the direct or indirect condensation exhaust steam in steam turbine in metal surface, can significantly reduce the air-cooled type generating of firepower power station and nuclear power station water consumption, all over the world especially China rise day by day.
Existing air-cooled type power station, it utilizes the key equipment of air setting exhaust steam in steam turbine to claim power station air cooling device, air cooling island etc. again, mainly be divided into two kinds of Direct Air-Cooled and indirect air coolings: exhaust steam in steam turbine directly enters the abbreviation Direct Air-Cooled that air cooler carries out condensation, the condensation heat of exhaust steam in steam turbine is taken to the indirect air cooling that abbreviates as that cools off in the air cooler by recirculated cooling water.
The cooling tube bundle arrangement:
Existing power station direct air-cooling device is normally with the air cooler cooling tube bundle, reach the air cooler tube bundle assembly about ton surplus in the of 4600 as 600MW unit gross weight, be arranged in high more than 45 meters apart from ground, on the huge High Altitude Platform surplus the area nearly 8000 square metre, by being located at the large axial flow fan air blast vertically upward of air cooler tube bundle below, make it pass cooling tube bundle, take away the latent heat that the exhaust steam condensation in the tube bank is emitted, realize purpose with the direct condensation exhaust steam in steam turbine of air.
Existing power station indirect air cooling device adopts round hyperbola gravity-flow ventilation tower usually, the utilization lift that air cooler at the bottom of the tower air after being heated produces of flowing through, constantly periphery suction cold air cools off at the bottom of the tower, and the arrangement of its cooling tube bundle is divided into circumference at the bottom of the tower again; Or in tower inner plane or conical surface layout.
Finned tube surface structure and characteristics:
Finned tube is the core cooling element of existing power station air cooling device.The cross section surface structure mainly contains: 1. oval, major axis 72mm, minor axis 20mm steel pipe are around three combs of oval steel disc, and wingization is seen the Fig. 1 in the Figure of description than about 9.94; 2. oval, major axis 100mm, two combs of minor axis 20mm steel pipe socket rectangle steel disc, wingization is seen the Fig. 2 in the Figure of description than about 13.85; 3. pancake, the single row of tubes that 220mm * 20mm flat pipe welds snakelike aluminium flake, wingization is than about 12.75 Fig. 3 that see in the Figure of description; 1., 2., 3. have the little and good characteristics of anti-freeze spalling performance of air flow resistance; 4. circular, six combs of diameter 17.75mm aluminium pipe sleeve rectangle aluminium flake, wingization is seen the Fig. 4 in the Figure of description than about 14.3, has lightweight characteristics.
The relation of air flow and cooling tube bundle arrangement:
The operating fan energy consumption of Direct Air-Cooled device, mainly be that the flow through resistance of air cooler tube bundle of air causes, in order to reduce the energy consumption of air cooler running, people have adopted oval, pancake finned tube, allow air along the outer wall of the pipe section long axis direction air cooler tube bundle of flowing through, to reach the purpose that reduces air drag, cuts down the consumption of energy.When being the cooling of non-condensing medium in this ellipse, pancake finned tube are used to manage, air-flow direction can change arbitrarily with oval, pancake finned tube major cross-sectional axis direction, can both reach the reduction windage, and then reduce the purpose of fan energy consumption, cost.
Oval, pancake finned tube shape characteristics, the air cooler tube bundle of flowing through on the cooling air can only be taked to descending:
When oval, pancake finned tube, in being used for managing medium when cooling procedure has the condensation liquefaction medium to occur, especially a large amount of when medium, even when all liquefying, as be specifically designed to water vapour, gas ammonia condensation or the like.Because gravity effect, the cooling medium of liquefaction will flow to the pipe bottom, again owing to the film coefficient of heat transfer of liquid at wall, all much smaller than the condensation heat transfer film coefficient of steam at wall, the thermal conductivity factor of liquid is farther less than tens times of tube wall metal material thermal conductivity factors in addition, a large amount of condensate liquids stockpile in pipe: 1., not only will reduce the cooling effect of finned air cooler greatly; 2., also will significantly increase the flow resistance of medium in pipe; 3., when being lower than 0 ℃, air themperature also can very easily cause water vapor condensate in tube bank, to freeze, the lighter's plugging, and weight person will restrain spalling.
So in order to reduce the unfavorable factor that the condensed fluid that stockpiles in the finned tube causes as far as possible, macropinacoid oval, the pancake finned tube just must take to be parallel to the gravity direction layout; Simultaneously also will with oval, the pancake finned tube is taked and the mode of horizontal plane inclination certain angle is arranged, so that the liquid of in-tube condensation is under the effect of gravity, after flowing to the major axis lower end of the bigger ellipse of curvature, pancake finned tube, can go out finned tube along the pipe underflow that tilts again.
Existing ellipse, when the pancake finned tube is used for the power station air cooling device,, flow out finned tube, usually finned tube is increased to about 60 ° with the angle of inclination with horizontal plane for reducing floor space and accelerating lime set because volume is very huge.Because of macropinacoid must be parallel to gravity, for reducing air drag and fan energy consumption, air-flow direction also just must be parallel with gravity direction.For reducing after the heat exchange flood tide hot-air to the adverse effect of ground environment, can only take air to down and on the air cooler tube bundle of flowing through, as the air cooler of 600MW generating set, per hour the hot-air of Pai Chuing reaches about 1 billion cubic meter, has only its row to the high-altitude direction away from ground environment.
The direction that such ellipse, pancake finned tube and arrangement, air can only be taked upwards to flow is a unique selection.The air cooler of this finned tube cross section structure and arrangement puts into operation all over the world in the less Europe of wind-force and sand and dust etc., and the energy-saving effect that reduces the cooling air drag is sure.
But, the such finned tube cross section structure and the air cooler of arrangement are grafted directly to that wind-force is big, a year blow-time reaches thousands of hours, and the westerlies, the Northern Hemisphere that air sand and dust content is higher on the power station air cooling device of especially Chinese northern area, just following problem occurred:
1., the power station air cooling device of this form is in the many westerlies China north of wind strong wind, then can not utilize the kinetic energy of horizontal wind to drive air and directly blow into air cooler tube bundle, and then reduction blower fan power consumption, in the power station direct air-cooling device, can only utilize the electric power of power plant to drive air, blow over air cooler tube bundle, come medium in the cooling tube, this is obviously unreasonable;
2. because power station air cooling device air consumption is very huge, must reserve enough cold airs for blower fan air intake direction and enter the space, height as 600MW power station air cooling device air inlet, just must be arranged on the height more than 40 meters, and the lift that does not utilize hot-air after this space and the heat exchange to combine generation comes the auto-pumping cold air, and this obviously is not most economical power station air cooling device;
3. since finned tube become 60 ° of layouts with horizontal plane, so account for the air side film-cooled heat more than 92% the fin plane and the angle between the horizontal plane just about 30 °.Because the effect of gravity accounts for plane on the fin of air side film-cooled heat 46% or more, with regard to easier deposition sand and dust, cause the finned tube exchange capability of heat to descend rapidly in the more area of air sand and dust content.This class power station air cooling device spring and summer that puts into operation in northern China must clean a finned-tube bundle in every month, otherwise will have a strong impact on the generating energy consumption and the cost in air cooling power station.So the mode of having only employing significantly to increase wash number is kept the operation of air-cooled type TRT.
4. be arranged in six combs of the circular aluminium pipe sleeve rectangle aluminium flake of cooling stack, be called Hungary good fortune brother type (Forgo) radiator again, also be arranged vertically owing to cooling water pipe, account for the fin of air side film-cooled heat more than 93% and then be horizontal versions, this is in the heavier China north of air sand and dust, also because of the last plane of fin area more than 46% very easily deposits dust, still must clean a finned-tube bundle in every month summer, can keep the normal operation in power station.The air cooler floor space of this indirect cooling than 12 times the power station direct air-cooling device that is traditional cooling tower, at least also will be twice abovely, and simultaneously investment cost still will increase more than 50% than Direct Air-Cooled device.Therefore, the power station air cooling device of this indirect cooling is also not too satisfactory.
Existing power station air cooling device, also has the following disadvantages except that having above-mentioned needs improvement in the face of the environment that wind-force is big, the west wind time is long, sand and dust content is high:
1. because steam condensation coefficient height, existing power station air cooling device wingization is than relatively low, thereby causes power station air cooling device weight per unit area big, and investment is high;
2. oval, pancake pipe is added 60 ° of angles and is arranged, condensation film is at the inwall path length that vertically remains in a standstill, the twice that reaches major axis dimension reaches more than 140～400mm and since the not enough metal pipe material of the thermal conductivity factor of water 2%, remaining in a standstill will cause restraining heat transmission resistance in the condensate liquid of inwall and increase.Though adopted lower wing ratio, increase the intraductal heat transfer area relatively, reduce thermal resistance,, this also becomes and increases the air cooler weight of equipment, increases the one of the main reasons of cost of investment;
The fin plane of 3. existing power station direct air-cooling device condensation tube bank is horizontal by about 30 ° angle, be angle about 60 ° with airflow direction vertically upward, cause the air-flow must be during finned-tube bundle through positive and negative twice 60 ° turn in turnover, this has increased the flow through resistance of air cooler tube bundle of air undoubtedly, has increased aerodynamic losses;
4. existing power station direct air-cooling device, the axial flow blower group places the tube bank below, and the opposite air cooler tube bundle of flowing through with gravity direction of flow of cooled air direction has not only increased blower fan support fixation cost, and because the noise that places the blower fan group of tube bank below to produce, at the 8000m of ground and 45 meters height
2Form between the platform and come back reflective resonance, as the 600MW unit 64 110kw axial flow blower collectives operations the time, noise sound wave about the about 800Hz of centre frequency that forms can only space environment spread out of around the platform below is clog-free, becomes serious sound pollution around power plant's air cooler.Be noise-decreasing, be forced to select for use the expensive slow-speed of revolution, super-silent axial flow blower.But owing to form reflection resonance invigoration effect between platform and the ground, the noise of Direct Air-Cooled device surrounding environment is dropped on the desirable level, thereby make the noise that produces when eliminating the operation of power station direct air-cooling device also become an industry difficult problem;
5. cold air vertically upward, the at first condensed water heat exchange bottom tube bank, owing in pipe air side windward side normal ± 30 ° scopes maximum film coefficient of heat transfer is arranged, the relative pipe side of air themperature, back are lower in addition, so be easy to cause in-tube condensation water to freeze in the winter below 0 ℃;
The condensing heat-exchange effect of 6. existing power station direct air-cooling device is subjected to the influence of ambient wind velocity very big, the hot air circulation of bringing in the time of always can not fundamentally effectively eliminating wind speed greater than 6 meter per seconds, and this also is the still unsolved so far industry difficult problem in China air-cooled type power station.
7. not only floor space is big for existing power station indirect air cooling device, and investment is high;
8. existing power station direct air-cooling device is arranged on the High Altitude Platform high more than 45 meters as the air cooler of 600MW unit, causes device civil engineering, High Altitude Platform, equipment installation cost height;
9. existing straight air cooling is in operation and can not in time finds the gas leakage tube bank, cause in time handling the gas leakage tube bank, lowered tube bank vacuum, this has not only increased the air cooler cooling load, but also reduced the heat power efficiency of steam turbine, and then reduced the power station economic benefit.
10. existing power station direct air-cooling device, air cooler as the 600MW unit is arranged on the High Altitude Platform high more than 45 meters, cause that vacuum line is long especially, the tube fluid resistance is big, this also increases vacuum system investment cost and operation power consumption simultaneously not only bad for the vacuum that improves in the air cooler.
In view of the above-mentioned deficiency of existing power station air cooling device, it is perfect that the present invention adopts following content to give.
Summary of the invention
1. the circular finned tube that adopts the level of approximation layout is characterized in that as the core parts that power station air cooling device and air carry out the surface-type heat exchange:
(1) circular finned tube is done air cooler heat exchange core parts, the cooling air can blow into air cooler tube bundle from the arbitrary orientation of circumference, the natural wind of nature horizontal direction just can be without the turning process of off-energy, carry out exchange heat and directly blow into air cooler tube bundle, realization is to the condensation of low-pressure steam in managing, make full use of the distinctive abundant natural wind resource of China and carry out the cooling of electric turbine exhaust steam, saved the blower fan power consumption greatly;
(2) finned tube is closely horizontally disposed, fin plane and the gravity direction perpendicular with finned tube just are in approximately parallel state, becoming 5 ° angle with horizontal plane with finned tube is example, the projection of fin on horizontal plane only for fin surface long-pending 4.4%, with existing ellipse, the last plane of pancake fin reaches 46% and compares, the surface area that gravitate is easy to deposit dust has reduced more than 90%, thereby weakened greatly at the heavier Chinese northern area of sand and dust content, fin deposition dust, increase thermal resistance process, guaranteed the long-term cooling effect of aerial condenser effectively, vertical fin surface also is easier to clean simultaneously;
(3) since wind with the horizontal finned tube that skims over of horizontal direction, lateral surface at the bottom of the moving pipe that condensate liquid contacted of pipe underflow, the wind-warm syndrome of skimming over not only is higher than the pipe windward side, and since the film coefficient of heat transfer of pipe crosswind face far below the windward side.So the finned tube of this mode heat exchange is not prone to relatively in cold season and freezes to stop up or freeze the spalling accident.
2. the 1. described finned tube of this case summary of the invention is made as the V-arrangement cooling unit of the Fig. 5 in the Figure of description, aerial condenser shown in Figure 8, or the two V-arrangement cooling units shown in Figure 9 in the Figure of description, Figure 10 in the by specification accompanying drawing and mode shown in Figure 11 are arranged to the cylindrical shape aerial condenser of Direct Air-Cooled; About the temperature rise ratio indirect air cooling of air cooler doubled because Direct Air-Cooled, air are flowed through, the air consumption reduced relatively in a large number, adds temperature rise, and hot-air lift is big, flow velocity is high, and the diameter of air cooling tower just can reduce, and not only reduces occupation of land but also save investment.Can make full use of the outer cold air of lift suction air cooler tube bundle that hot-air produces in the air cooling tower like this, realize the desirable purpose of zero power consumption of power station direct air-cooling device.
3. the power station air cooling device that power is bigger, circle diameter is big, the wall flow behavior that becomes that hot-air upwards flows.Be the cold air that prevents that the air duct outlet is heavier than hot-air, blow back into the air cooling tower bottom, form the central area cold air and flow downward, harmful circulative convection that air duct inner surface heat air upwards flows through the air duct central part.The design with air cooling tube bank be arranged as in the Figure of description Figure 12, Figure 13 and etc. central annular heat exchanger components 7 and 9 liang of parts of peripheral annular heat exchanger components shown in the figure.Leave the circular passage 6 that cold air enters the central annular tube bank between peripheral annular heat exchanger components bottom and the Equipment Foundations, so that allow the cold air of air cooling tower outside, can radially flow to central annular heat exchanger components 7 along the tower bottom perimeter, and the heat that fin spreads out of is restrained in absorption, rising temperature, density enter the central area after reducing, utilize the effect of the lift or the blower fan of hot-air, upwards flow out exhausting tube 4 along vertical axis again, thereby effectively eliminated harmful convection current of cold and hot air in the large-scale air cooling tower exhausting tube.
Change but 4. a box haul is set outside the described air cooling tower of this case, and the curved surface of rotation returns air curtain 11 automatically.See shown in 11 among Figure 16, the Figure 17 in the Figure of description, or in the Figure of description Figure 21, Figure 22, Figure 23 11 shown in, utilize the reflection characteristics and the fluid mechanics principle of symmetroid, so that whole face of cylinder arbitrary orientation all has and the essentially identical total blast in natural wind windward side.
(1) because the symmetry characteristic of curved surface, with curved surface return the air curtain steelframe with along the rotatable structure of cooling tower central axis, under the effect of wind-force, this curved surface returns the horizontal axis of air curtain will be all the time over against the wind comes from direction, and need not to carry out artificial automatic control, thereby not only simplified apparatus structure, improved device reliability, and reduced investment.
(2) because the rotatable setting of returning air curtain, thereby satisfied under annual any wind direction condition, all can make the cooling tube bundle annular heat exchanger components on the whole cooling tower cylinder, can both utilize natural wind to carry out the air cooling to greatest extent, the purpose that realizes reducing the blower fan power consumption even utilize the blower fan generating.
(3) this air curtain adopt can lifting the sail structure drop in the sail cabin that is located at ground so that when calm, will return air curtain, reduce to enter the air intake resistance of air cooler; When wind-force is too big, suitably reduce the height of air curtain, and even drop in the cabin, with plan safety;
(4) height of raising air curtain can reduce the width of air curtain, promptly reduces the radius of turn of air curtain, reduces and takes up an area of.
5. with axial flow blower, see 10 among Figure 14, the Figure 15 in the Figure of description, 10 among Figure 16, Figure 17, Figure 18, Figure 19 shown in 10 among Figure 21, Figure 22, is arranged on the bottom of the exhausting tube of cylindrical air cooling tower.
(1), can effectively reduce the noise of air cooling tower surrounding environment owing to the barrier effect of face of cylinder cooling tube bundle and air duct;
(2) blower fan is in the air-flow after the heat exchange, among also being in working temperature environment more than 0 ℃ all the time winter, helps motor, gear-box, fan bearing, blade long period reliability service, reduces fault.
6.,, can make full use of the lift effect of hot-air, not only hot blast be arranged to the high altitude environment away from ground, and will be reduced power consumption greatly owing to all be full of hot-air in the cylindrical cooling section of air cooling tower and the air duct.
7. the rotating speed of fan blade and inclination angle can be adjusted at fan operation state, blower fan shut down condition and wind-power electricity generation state automatically with temperature and air-out speed.
8. since the wind speed of natural wind with highly increase, the cooling tube bundle that in addition is in top is nearer apart from blower fan, the friction of distance of wind is little, with density, the wing ratio of finned tube in tube bank, increase and the appropriateness increase at cooling tower face of cylinder height with tube bank, to improve the utilization rate and the space availability ratio of natural wind.
Description of drawings
Accompanying drawing 1～4 is the primary structure schematic diagram of the core heat exchange element of existing power station air cooling device.Wherein:
Fig. 1 is the three comb heat exchange elements of steel pipe around oval steel disc, and arrow is the air inflow direction;
Fig. 2 is two comb heat exchange elements of oval steel pipe socket rectangle steel disc, and arrow is the air inflow direction;
Fig. 3 welds the single row of tubes heat exchange element of snakelike aluminium flake for the flat pipe, and arrow is the air inflow direction;
Fig. 4 is six comb heat exchange elements of circular aluminium pipe sleeve rectangle aluminium flake, and arrow is the air inflow direction.
Accompanying drawing 5 for the utility model designs, adopts circular finned tube to overlook diagrammatic sketch as the aerial condenser V-arrangement cooling unit primary structure that power station air cooling device and air carry out the surface-type heat exchange.Wherein:
1 is the low-pressure steam inlet tube that is condensed.When being used for indirect air cooling, be water inlet pipe;
2 for forming the circular finned tube of V-arrangement finned-tube bundle cooling unit;
3 is the steam condensate (SC) collecting pipe.When being used for indirect air cooling, be outlet pipe;
B is the angle in the center of circle for the circular finned tube of forming the V-arrangement cooling unit with the low-pressure steam inlet tube, and this angle as required can be between 60 °～180 °; Arrow is the air inflow direction.
The circular finned tube cooling element that Fig. 6 adopts for the utility model;
Fig. 7 is circular finned tube cooling element left view.
Accompanying drawing 8 for the utility model designs, adopts circular finned tube to look diagrammatic sketch as the aerial condenser V-arrangement cooling unit primary structure master that power station air cooling device and air carry out the surface-type heat exchange.Among the figure:
1 is the low-pressure steam inlet tube that is condensed.When being used for indirect air cooling, be water inlet pipe;
2 for forming the circular finned tube of V-arrangement finned-tube bundle cooling unit;
3 is the steam condensate (SC) collecting pipe.When being used for indirect air cooling, be outlet pipe;
α is the circular finned tube of composition V-arrangement cooling unit and the inclination angle between the horizontal plane, and this angle can be beneficial to flowing out of condensed water as required in the finned tube that tilts between 3 °～45 °.
Fig. 9, for the utility model is used for the power station direct air-cooling device, or two V-arrangement cooling unit vertical views of the bigger power station indirect air cooling device of cooling air temperature rise;
Arrow is the air inflow direction.
Figure 10, cylindrical shape aerial condenser front view, Figure 11 of being used for the Direct Air-Cooled of small hydropower station for the utility model are vertical view.The utilization V-arrangement finned-tube bundle cooling unit at the bottom of the tower of flowing through, the lift that the air after being heated produces in tower, constantly from the V-arrangement finned-tube bundle cooling unit outside, the suction cold air cools off the exhaust steam in steam turbine in the finned tube.Among the figure:
4, be the exhausting tube;
5, the annular heat exchanger components of forming for the V-arrangement finned-tube bundle cooling unit that is arranged in tower bottom;
Arrow is an air flow.
Figure 12, cylindrical shape aerial condenser front view, Figure 13 of being used for the Direct Air-Cooled in large and medium-sized power station for the utility model are vertical view.The air cooling tube bank is arranged as central annular heat exchanger components 7 and 9 liang of parts of peripheral annular heat exchanger components, leave the annular footpath circulation road 6 that cold air enters the central annular tube bank between peripheral heat exchanger components bottom and the Equipment Foundations, so that allow the cold air of air cooling tower outside, can radially flow to the central annular heat exchanger components along the tower bottom perimeter, and the heat that fin spreads out of is restrained in absorption, the rising temperature, density enters the central area after reducing, utilize the effect of the lift or the blower fan of hot-air, upwards flow out the air cooling tower top outlet along vertical axis again, thereby effectively eliminate harmful convection current of cold and hot air in the large-scale exhausting tube.Among the figure:
4, be the exhausting tube;
6, be the radial inflow passage of cold air inflow central annular heat exchanger components;
7, be the central annular heat exchanger components.
8, be hot and cold air insulated curtain;
9, be the peripheral annular heat exchanger components;
Arrow is an air flow.
Figure 14 has limitation in height for the utility model is built in to facility, can only partly utilize hot-air lift, and cylindrical shape aerial condenser front view, Figure 15 of being furnished with the small hydropower station Direct Air-Cooled of axial flow blower are vertical view.Among the figure:
4, be the exhausting tube;
5, the cylinder annular heat exchanger components of forming for the two V-arrangement finned-tube bundle cooling units that are arranged in tower bottom;
10 is axial flow blower;
Arrow is an air flow.
Figure 16, wind-force is big, blow-time is long for the utility model is built in, and cylindrical shape aerial condenser front view, the Figure 17 that can make blower fan be in the small hydropower station Direct Air-Cooled of generator operation environment are vertical view.Among the figure:
4, be the exhausting tube;
5, for the two V-arrangement finned-tube bundle cooling units that are arranged in tower bottom are formed cylinder annular heat exchanger components;
But 10 is the axial flow blower of generator operation.
11, for making full use of the air curtain that returns of natural wind energy;
Figure 18 for the utility model has limitation in height to facility, can only partly utilize air lift, and cylindrical shape aerial condenser front view, Figure 19 of joining the large and medium-sized power station direct air-cooling of axial flow blower are the A-A view for vertical view, Figure 20.Among the figure:
4, be the exhausting tube;
6, be the radial inflow passage of cold air inflow central annular heat exchanger components.
7, be the central annular heat exchanger components;
8, be hot and cold air insulated curtain;
9, be the peripheral annular heat exchanger components;
10, be axial flow blower;
Arrow is an air flow.
Figure 21, wind-force is big, blow-time is long for the utility model is built in, and cylindrical shape aerial condenser front view, the Figure 22 that can make blower fan be in the large and medium-sized power station direct air-cooling of generator operation environment are the A-A view for vertical view, Figure 23.Among the figure:
4, be the exhausting tube;
7, be the central annular heat exchanger components;
8, be hot and cold air insulated curtain;
9, be the peripheral annular heat exchanger components;
10, but be the axial flow blower of generator operation;
11, for abundant wind utilizes the air curtain that returns of natural wind energy.
The specific embodiment
One, 600Mw gravity-flow ventilation ACC large-scale power station Direct Air-Cooled device parameter list is an example, and embodiments of the present invention are described.
Adopt the 600Mw large-scale power station Direct Air-Cooled device of the utility model design, owing to take up an area of little, it can be built in the generator factory building A row outside fully, thereby kept the short relatively advantage of former forced ventilation Direct Air-Cooled device main steam range, eliminated shortcomings such as power consumption height, investment is high, big, the anti-natural wind capability of influence of noise is weak.
Two, 30Mw axial flow blower forced ventilation small hydropower station Direct Air-Cooled device parameter list is an example, and embodiments of the present invention are described.
| Sequence number | Parameter name | Unit | Quantity | Remarks |
| 1 | Unit capacity | Mw | 30 | |
| 2 | The exhaust steam total amount | t/h | 60 | During high back pressure |
| 3 | Temperature extreme value amplitude | ℃ | -36.0～40.0 | |
| 4 | Local height above sea level | m | 1000 | The air duct bottom |
| 5 | Design temperature | ℃ | 16.0 | |
| 6 | Design back pressure (P C) | kPa | 13.2 | 50 ℃ of condensation temperatures |
| 7 | Full send out high back pressure (P C) | kPa | 36.6 | 72 ℃ of condensation temperatures |
| 8 | Initial temperature differences ITD | ℃ | 38 | |
| 9 | The air cooler area of dissipation | m 2 | 6.×10 4 | |
| 10 | Air cooler Dan Rong | m 2/kw | 2.5 | |
| 11 | Concurrent-countercurrent area ratio | 2.5∶1 | ||
| 12 | Unit site area | m 2/Mw | 12.67 | |
| 13 | The air cooling tower maximum gauge | m | 22 | |
| 14 | The thermal extremes air mass flow | kg/h | 5.5×10 6 | |
| 15 | Air cooling tower air duct outlet diameter | m | 20 | |
| 16 | Air cooling tower air duct height | m | 42 | |
| 17 | The air cooling tower maximum height | m | 50 | |
| 18 | Thermal extremes air cooling tower outlet air flow rate | m/s | 5.5 | |
| 19 | The thermal extremes air tube bank resistance drop of flowing through | Pa | 60 | |
| 20 | The thermal extremes air shutter resistance drop of flowing through | Pa | 12 | |
| 21 | The thermal extremes air goes out tower kinetic energy rejection resistance drop | Pa | 15 | |
| 22 | Other drag losses falls | Pa | 2 | |
| 23 | The tube bank temperature rise of flowing through of thermal extremes air | ℃ | 15 | |
| 25 | Flow through during thermal extremes the tube bank after averag density poor | kg/m 3 | 0.077 | |
| 26 | Air duct draft during thermal extremes | Pa | 32 | |
| 27 | Air cooling tower drag overall during thermal extremes | Pa | 89 | |
| 28 | Axial flow blower boosts | Pa | 57 | |
| 29 | The total power consumption of axial flow blower | kw | 180 | Contain electricity consumptions such as vavuum pump |
| 30 | The air cooling tower ambient noise | dB | ＜70 | |
| 31 | Air cooling device always takes up an area of | m 2 | ＜720 | Contain air cooling tower 4m fire-fighting access path on every side |
Be subjected to the environment of limitation in height, adopting the power station air cooling device of the utility model design, noise is low relatively, power consumption is low, the strong advantage of anti-natural wind capability of influence.
Three, 30Mw adopts the axial flow blower that can generate electricity to add and returns air curtain forced ventilation small hydropower station Direct Air-Cooled device parameter list is example, illustrates in the many regional embodiments of the present invention of wind strong wind
| Sequence number | Parameter name | Unit | Quantity | Remarks |
| 1 | Unit capacity | Mw | 30 | |
| 2 | The exhaust steam total amount | t/h | 60 | During high back pressure |
| 3 | Temperature extreme value amplitude | ℃ | 0.0～40.0 | |
| 4 | Local height above sea level | m | 1000 | The air duct bottom |
| 5 | Design temperature | ℃ | 16.0 | |
| 6 | Design back pressure (P C) | kPa | 13.2 | 50 ℃ of condensation temperatures |
| 7 | Full send out high back pressure (P C) | kPa | 36.6 | 72 ℃ of condensation temperatures |
| 8 | Initial temperature differences ITD | ℃ | 38 | |
| 9 | The air cooler area of dissipation | m 2 | 6.×10 4 | |
| 10 | Air cooler Dan Rong | m 2/kw | 2.5 | |
| 11 | Concurrent-countercurrent area ratio | 2.5∶1 | ||
| 12 | Unit site area | m 2/Mw | 24 | Contain and return the air curtain floor space |
| 13 | The air cooling tower maximum gauge | m | 22 | |
| 14 | The thermal extremes air mass flow | kg/h | 5.5×10 6 | |
| 15 | Air cooling tower air duct outlet diameter | m | 20 | |
| 16 | Air cooling tower air duct height | m | 30 | |
| 17 | The air cooling tower maximum height | m | 38 | |
| 18 | Return the air curtain rotating diameter | m | 30 | |
| 19 | Return the air curtain height | m | 20 | |
| 20 | Return the air curtain total cross section that facings the wind | m 2 | 600 | |
| 21 | Thermal extremes air cooling tower outlet air flow rate | m/s | 5.5 | |
| 22 | The thermal extremes air tube bank resistance drop of flowing through | Pa | 60 | |
| 23 | The thermal extremes air shutter resistance drop of flowing through | Pa | 12 | |
| 25 | The thermal extremes air goes out tower kinetic energy rejection resistance drop | Pa | 15 | |
| 26 | Other drag losses falls | Pa | 2 | |
| 27 | The tube bank temperature rise of flowing through of thermal extremes air | ℃ | 15 | |
| 28 | Flow through during thermal extremes the tube bank after averag density poor | kg/m 3 | 0.077 | |
| 29 | Air duct draft during thermal extremes | Pa | 23 | |
| 30 | Air cooling tower drag overall during thermal extremes | Pa | 89 | |
| 31 | Axial flow blower boosts | Pa | 66 | |
| 32 | The total power consumption of axial flow blower | kw | ＜0 | Axial flow blower begins generating during wind speed 〉=7m |
| 33 | The air cooling tower noise | dB | ＜85 | |
| 34 | Air cooling device always takes up an area of | m 2 | ＜720 | Contain the air cooling tower fire-fighting access path of 4m on every side |
Adopt the utility model to build the environment that wind is big, blow-time long, the low temperature time is short in, can realize the blower fan generator operation.
Claims (6)
1. exhaust steam in steam turbine aerial condenser, connect to form the cooling unit of aerial condenser by a low-pressure steam inlet tube, two condensed water collecting pipes and some finned tubes, after some aerial condenser tube bank cooling units are combined into heat exchanger components, again with air duct, axial flow blower set, form complete exhaust steam in steam turbine aerial condenser, it is characterized in that: the low-pressure steam inlet tube (1) that links to each other with finned tube (2) in the cooling unit of aerial condenser and two condensed water collecting pipes (3) are all vertically arranged; Finned tube (2) and condensed water collecting pipe (3) are connected layouts with low pressure steam pipe (1) central axis symmetry, V-arrangement included angle B=60～180 between the finned tube of symmetry connection layout °; The fin and the pipe of finned tube are circle; Finned tube (2) with and angle α=3～45 of horizontal plane ° be connected between low-pressure steam inlet tube (1) and the condensed water collecting pipe (3); Clear distance r 〉=400mm between two V-arrangement finned-tube bundle cooling unit two low pressure steam pipes.
2. exhaust steam in steam turbine aerial condenser according to claim 1 is characterized in that: the V-arrangement cooling unit of aerial condenser is combined into annular heat exchanger components (5), gathers with the exhausting tube (4) on its top again, forms the cylindrical shape aerial condenser of Direct Air-Cooled.
3. exhaust steam in steam turbine aerial condenser according to claim 1 is characterized in that: the V-arrangement cooling unit of aerial condenser is arranged as central annular heat exchanger components (7) and peripheral annular heat exchanger components (9) two parts; Be provided with hot and cold air insulated curtain (8) between the two annular heat exchanger components; Leave the annular radial flow channel (6) that cold air enters the central annular heat exchanger components between peripheral annular heat exchanger components (9) bottom and the Equipment Foundations.
4. exhaust steam in steam turbine aerial condenser according to claim 1 is characterized in that: (1) outside air cooling tower, be provided with have a symmetroid return air curtain (11);
5. exhaust steam in steam turbine aerial condenser according to claim 1 is characterized in that: axial flow blower (10) is horizontally disposed in exhausting tube (4) bottom.
6. exhaust steam in steam turbine aerial condenser according to claim 1 is characterized in that: the heat exchanger components below the horizontally disposed axial flow blower (10) partly is made up of central annular heat exchanger components (7) and peripheral annular heat exchanger components (9) two.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920082611XU CN201583155U (en) | 2009-07-16 | 2009-07-16 | Steam exhaust air condenser for steam turbine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920082611XU CN201583155U (en) | 2009-07-16 | 2009-07-16 | Steam exhaust air condenser for steam turbine |
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| CN201583155U true CN201583155U (en) | 2010-09-15 |
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| CN200920082611XU Expired - Fee Related CN201583155U (en) | 2009-07-16 | 2009-07-16 | Steam exhaust air condenser for steam turbine |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102536705A (en) * | 2010-12-31 | 2012-07-04 | 施国梁 | Tower-type solar thermal power generation device with siphon turbine engine |
| CN102759284A (en) * | 2012-07-13 | 2012-10-31 | 华北电力大学 | Finned tube bundle radiating structure vertically distributed on circumference space of wind cooling tower |
| CN102980417A (en) * | 2012-12-03 | 2013-03-20 | 中国电力工程顾问集团西北电力设计院 | Tower type direct air cooled condenser and tower type direct dry cooling system thereof |
| CN105066730A (en) * | 2015-07-24 | 2015-11-18 | 中国电力工程顾问集团西北电力设计院有限公司 | Lotus flower type condenser and hertz dry cooling system |
| CN105403065A (en) * | 2015-12-11 | 2016-03-16 | 双良节能系统股份有限公司 | Direct air-cooling system adopting natural ventilation |
| CN107014861A (en) * | 2017-04-21 | 2017-08-04 | 机械工业上海蓝亚石化设备检测所有限公司 | A kind of finned tube testing device for heat transferring performance of single |
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2009
- 2009-07-16 CN CN200920082611XU patent/CN201583155U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102536705A (en) * | 2010-12-31 | 2012-07-04 | 施国梁 | Tower-type solar thermal power generation device with siphon turbine engine |
| CN102536705B (en) * | 2010-12-31 | 2016-01-20 | 施国樑 | With the tower solar generation device of siphon turbine engine |
| CN102759284A (en) * | 2012-07-13 | 2012-10-31 | 华北电力大学 | Finned tube bundle radiating structure vertically distributed on circumference space of wind cooling tower |
| CN102980417A (en) * | 2012-12-03 | 2013-03-20 | 中国电力工程顾问集团西北电力设计院 | Tower type direct air cooled condenser and tower type direct dry cooling system thereof |
| CN102980417B (en) * | 2012-12-03 | 2014-10-15 | 中国电力工程顾问集团西北电力设计院 | Tower type direct air cooled condenser and tower type direct dry cooling system thereof |
| CN105066730A (en) * | 2015-07-24 | 2015-11-18 | 中国电力工程顾问集团西北电力设计院有限公司 | Lotus flower type condenser and hertz dry cooling system |
| CN105066730B (en) * | 2015-07-24 | 2017-03-01 | 中国电力工程顾问集团西北电力设计院有限公司 | Flos Nelumbinis condenser and hertz dry cooling systems |
| CN105403065A (en) * | 2015-12-11 | 2016-03-16 | 双良节能系统股份有限公司 | Direct air-cooling system adopting natural ventilation |
| CN107014861A (en) * | 2017-04-21 | 2017-08-04 | 机械工业上海蓝亚石化设备检测所有限公司 | A kind of finned tube testing device for heat transferring performance of single |
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