CN205448739U - Improve frost resistance's natural draft air cooling tower - Google Patents
Improve frost resistance's natural draft air cooling tower Download PDFInfo
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- CN205448739U CN205448739U CN201521031279.6U CN201521031279U CN205448739U CN 205448739 U CN205448739 U CN 205448739U CN 201521031279 U CN201521031279 U CN 201521031279U CN 205448739 U CN205448739 U CN 205448739U
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- natural ventilation
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Abstract
The utility model discloses an improve frost resistance's natural draft air cooling tower, radiator or the condenser arranged perpendicularly including the natural draft air cooling tower, along the outer circumference of tower, lieing in the wide platform of exhibition on the air cooling tower X pillar, connecting the intake duct of the outer and tower of air cooling tata, a plurality of intake ducts set up in the tower bottom around the natural draft air cooling tower, tower separately cooling air advances the tower from intake duct " short circuit ", has improved the pressure of the interior air of tower, have reduced the air mass flow and the velocity of flow that the radiator of flowing through advances the tower greatly, have reduced the heat transfer volume of radiator, the utility model has the advantages of but simple structure, big, the freeze proof measure regulating measure of natural draft air cooling tower effective draft accommodative amplitude are nimble, winter power generating coal consumption low, economic nature is good.
Description
[technical field]
This utility model belongs to industry Cooling Design field, relates to a kind of natural ventilation air-cooling tower improving anti-freezing property.
[background technology]
Thermal Power Station's natural draft indirect dry cooling system faces serious antifreeze problem in north cold or severe cold area winter, for this, power plant's runtime in the winter time generally use close shutter outside radiator, exit part cooling sector with reduce participate in heat exchange the radiator gross area, improve that recirculated water runs in the measures such as water temperature control limit one or more, but there is obvious drawback in the antifreezing measures of these routines:
1, close the shutter outside radiator, be the most-often used antifreeze means of the power plant of all employing indirect air cooling systems.But the closedown of radiator blind is difficult to accomplish to fit together perfectly, especially for running radiator blind after a period of time, it is the most universal that deformable blade, breakage, blade gap between two ends become the situation such as big.If air is cold and recirculated water operation water temperature is relatively low, the existence of air leakage phenomena may still result in the frost heaving failure of radiator tube bank；
2, after cooling sector exits, if pipeline valve is not closed completely and leaks, sector radiator tube bank that what these should be emptied completely in theory exit will be filled with intimate static water, compared with the radiator that properly functioning lower recirculated water is in flow regime, the tube bank being filled with stationary water is easier to bursting by freezing！
Situation about being not closed completely due to cooling system pipeline valve between each power plant generally exists, these antifreezing measures of the most less employing in the actual winter operation of power plant；
3, improve recirculated water in winter and run the antifreezing measures the most practical, maximally effective that water temperature control limit is the actual employing of power plant using indirect air cooling system.But recirculated water runs the raising of water temperature, and turbine back pressure can be caused to raise, boiler coal consumption increases, and economics of power generation is deteriorated.
In the case of lacking more effective, more reliable antifreeze means, power plant's actual motion is had to use this sacrifice generating set performance driving economy to exchange the operation reserve of a cooling system especially radiator safety for.
Up to now, Thermal Power Station's gravity-flow ventilation direct air cooling system is the most still in conceptual phase, does not also have Practical Project to use.But it equally exists air cooling tower cooling capacity overstock problem in winter, the condenser that tower surrounding vertical is arranged also has the risk freezing to destroy, antifreeze principle and measure are also similar with indirect air cooling system, and this utility model is equally applicable for the direct air cooling system using gravity-flow ventilation.
The whole tower draft of natural ventilation air-cooling tower can be divided into two large divisions:
(1) lifting force of hot-air in tower
Tower outer cold air temperature after radiator or condenser heat exchange raises, and owing to the density of hot-air is less, can rise along tower, and the cold air outside tower supplements into, thus forms the convective flow of air.
In tower, the lifting force of hot-air accounts for the pith of cooling stack whole tower draft.
(2) inner suction that tower external environment Atmospheric Flow produces
In atmospheric boundary layer, wind speed increases with the increase of overhead height.When there is ambient wind outside tower, the air velocity of tower top can be higher than near the ground.According to bernoulli principle " the low then pressure of flow velocity is big, and flow velocity height then pressure is low ", there is pressure difference between causing at the bottom of tower top and tower in the difference of flow velocity, here it is the mechanism that inner suction exists.
Under ambient wind effect, even if there is no hot-air in tower, also result in the air flows upwards in tower.
Under the effect of cooling stack whole tower draft (lifting force and inner suction), can produce low-pressure area in tower, even if the shutter of radiator or condenser completely closes, tower outer air also has the trend flowed in tower through radiator or condenser.Once shutter is not closed completely, and cold air will be taken advantage of the crack and enter, and flows through radiator or condenser fin and takes away heat, the frost heave of radiator or condenser can be caused the most in some cases to damage.
[utility model content]
This utility model purpose is to provide a kind of natural ventilation air-cooling tower improving anti-freezing property, reduces and flows through radiator and enter air mass flow and the flow velocity of tower, reduces the heat exchange amount of radiator, thus the frost resistance of cooling system between improving.
For reaching above-mentioned purpose, the technical solution adopted in the utility model is:
A kind of natural ventilation air-cooling tower improving anti-freezing property, the broadening platform including natural ventilation air-cooling tower, along the vertically arranged radiator of natural ventilation air-cooling tower excircle, being positioned on natural ventilation air-cooling tower X pillar, connects that air cooling tower tower is outer and the air intake duct of tower；Multiple air intake ducts are arranged at tower bottom around natural ventilation air-cooling tower.
Further, described air intake duct is between the soleplate and ring group of natural ventilation air-cooling tower.
Further, air intake duct air inlet and air intake duct gas outlet are equipped with the removable cover that can open and close.
Further, described removable cover is armored concrete, steel construction or battenboard.
Further, described inlet channel cross-sectional is rectangle, circle or other cross section types.
Further, air intake duct air inlet and air intake duct gas outlet are provided with safety grids.
Further, air intake duct gas outlet is in tilted layout in tower.
Further, described natural ventilation air-cooling tower is reinforced concrete structure or steel construction.
Further, described natural ventilation air-cooling tower is to use surface condenser or the indirect air cooling system of direct-contact type condenser, or direct air cooling system.
Relative to prior art, this utility model has the advantage that
The natural ventilation air-cooling tower of improvement anti-freezing property of the present utility model, including natural ventilation air-cooling tower, along the vertically arranged radiator of natural ventilation air-cooling tower excircle, multiple air intake ducts are arranged at tower bottom around natural ventilation air-cooling tower, the outer cold air of tower enters tower from air intake duct " short-circuit ", improve the pressure of air in tower, substantially reduce and flow through radiator and enter air mass flow and the flow velocity of tower, reduce the heat exchange amount of radiator, thus improve the frost resistance of air cooling system.Due to the improvement of air cooling system frost resistance, can suitably reduce winter is that freeze proof needs are manually set higher recirculated water and control water temperature, thus reduces system back pressure, reduces boiler coal consumption, improves the economy that power plant runs.
Further, described air intake duct is between the soleplate and ring group of natural ventilation air-cooling tower, and air intake duct is in addition to import and export, and other are partially in underground, enters tower, flexible arrangement from the bottom of his inclined strut post of air cooling between buttress, and intake is big.
This utility model can be not only used for new construction it can also be used to the antifreeze transformation of existing natural draft air cooled condenser；Can be not only used for a machine one tower air cooling system scheme it can also be used to two machine one tower air cooling system schemes；Can be not only used for the vertically arranged natural draft indirect dry cooling system of radiator it can also be used to condenser vertically arranged gravity-flow ventilation direct air cooling system.Enter tower for the outer cold air of tower and provide controlled " shortcut ", make large quantity of air without " short-circuit " directly enters tower by radiator or condenser, flow in tower with making tower outer air lower resistance, improve the pressure of air in tower, tower inside and outside differential pressure is diminished, reduce and flow through radiator or condenser enters air mass flow and the flow velocity of tower, reduce the heat exchange amount of radiator or condenser, thus improve the frost resistance of air cooling system.
For using the air cooling system of two machine one tower schemes, owing to the scale of cooling stack is completely to send out scale required by two unit in summers to determine, when winter, single unit ran, cooling tower draft is big far beyond actually required draft, cooling capacity is superfluous, antifreeze particularly problematic, this even becomes the major obstacle of the two machine one tower air cooling system schemes of popularization.Use after this utility model, can opening section air intake duct in the winter time, reduce the effective draft of air cooling tower, improve the freezing tolerance of air cooling system.
This utility model can also be used for the direct air cooling system using cooling stack to provide draft.
[accompanying drawing explanation]
Fig. 1 is the floor map that this utility model uses state；
Fig. 2 is the three-dimensional oblique view that this utility model uses state；
Fig. 3 (a) does not use the natural ventilation air-cooling tower schematic diagram of this utility model air cooling system；
Fig. 3 (b) uses the natural ventilation air-cooling tower schematic diagram (air intake duct inlet close state) of this utility model air cooling system；
Fig. 3 (c) uses the natural ventilation air-cooling tower schematic diagram (air intake duct air inlet opening) of air cooling system of the present utility model；
Fig. 4 is this utility model intake port layout schematic diagram；
Fig. 5 is this utility model air intake duct 3-D view；
Fig. 6 (a) single-groove rectangle steel reinforced concrete raceway groove schematic diagram；
Fig. 6 (b) double ditch rectangle steel reinforced concrete raceway groove schematic diagram；
The pipe schematic diagrams such as Fig. 6 (c) steel pipe, glass reinforced plastic pipe, corrugated tube；
Fig. 6 (d) precast concrete pipe schematic diagram；
In figure: 1-natural ventilation air-cooling tower；2-radiator；3-broadening platform；4-air intake duct；5-air intake duct air inlet；6-air intake duct gas outlet；7-removable cover；8-safety grids.
[detailed description of the invention]
Below in conjunction with the accompanying drawings this utility model is described in further detail.
See Fig. 1～6 (d), a kind of natural ventilation air-cooling tower improving anti-freezing property, including natural ventilation air-cooling tower 1, along the broadening platform 3 between the vertical radiator 2, radiator to air cooling tower tower body of tower excircle layout and the air intake duct 4 between dry Cooling heat radiator soleplate and ring group.
Natural ventilation air-cooling tower 1 is armored concrete or steel construction, and process system is that radiator uses vertically arranged surface condenser or hybrid (Hai Leshi) condenser indirect air cooling system, or direct air cooling system；Radiator or condenser 2 are arranged vertically between cooling tower periphery, radiator or Condenser Top and cooling tower employing broadening platform 3 and seal sealing structure；
The air inlet of air intake duct is arranged in outside tower, and air intake duct air inlet 5 and air intake duct gas outlet 6 are equipped with the removable cover 7 that can open and close, and cover plate is armored concrete, steel construction, battenboard or other materials；The gas outlet of air intake duct is arranged in tower, and air intake duct gas outlet 6 is in tilted layout in tower, guides the flow direction of the flow of cooled air sucked outside tower, it is to avoid it directly blows to radiator or condenser.
Air intake duct 4 cross section is rectangle or circle, and air intake duct air inlet 5 and air intake duct gas outlet 6 are equipped with safety grids 8.Fig. 6 (a) single-groove rectangle steel reinforced concrete raceway groove；Fig. 6 (b) double ditch rectangle steel reinforced concrete raceway groove；The pipes such as Fig. 6 (c) steel pipe, glass reinforced plastic pipe, corrugated tube；Fig. 6 (d) precast concrete pipe；Air intake duct 4 can use various material to make, and simple in construction, conveniently draws materials, with low cost.
This utility model can be used in conjunction with other air cooling system antifreezing measures.
This utility model can be not only used for new construction it can also be used to the antifreeze transformation of existing natural ventilation air-cooling tower.When for new construction, intake port layout is between dry Cooling heat radiator or condenser soleplate and ring group；When for the technological transformation of existing engineering, intake air way under ground portion is passed between radiator or condenser soleplate and cooling tower ring group by push pipe or subsurface excavation method.
This utility model has the advantage such as simple in construction, flexible, low, the good economy performance of generating electricity in winter coal consumption of indirect cool tower effective draft amplitude of accommodation measure regulating measure big, freeze proof.
This utility model has the following characteristics that
(1) Fig. 3 (a) does not use air cooling system of the present utility model；Fig. 3 (b) uses air cooling system of the present utility model (air intake duct inlet close state)；Fig. 3 (c) uses air cooling system of the present utility model (air intake duct air inlet opening)；This novel natural ventilation air-cooling tower improving anti-freezing property is used through comparing, the outer cold air of tower enters tower from the air intake duct " short-circuit " being located between dry Cooling heat radiator or condenser soleplate and ring group, improve the pressure of air in tower, reduce tower inside and outside differential pressure, reduce and flow through radiator or condenser enters air mass flow and the flow velocity of tower, reduce the heat exchange amount of radiator or condenser, thus improve the frost resistance of air cooling system；
(2) due to the improvement of air cooling system frost resistance, it is possible to decrease winter is that freeze proof needs are manually set higher recirculated water control water temperature, thus reduces system back pressure, reduces boiler coal consumption, improves the economy that power plant runs.
(3) air intake duct air intake passage section is big, and air mass flow is big, and the effect of regulation effective draft is obvious；
(4) this utility model can be not only used for new construction and can also be used for the antifreeze transformation of existing natural draft air cooled condenser, can be not only used for a machine one tower air cooling system scheme it can also be used to two machine one tower air cooling system schemes；Can be not only used for the vertically arranged natural draft indirect dry cooling system of radiator it can also be used to condenser vertically arranged gravity-flow ventilation direct air cooling system.
Above content is further detailed description of the utility model; it cannot be assumed that detailed description of the invention of the present utility model is only limitted to this; for this utility model person of an ordinary skill in the technical field; without departing from the concept of the premise utility; some simple deduction or replace can also be made, all should be considered as belonging to this utility model and be determined utility model protection scope by the claims submitted to.
Claims (9)
1. the natural ventilation air-cooling tower improving anti-freezing property, it is characterised in that: the broadening platform (3) that include natural ventilation air-cooling tower (1), along the vertically arranged radiator of natural ventilation air-cooling tower (1) excircle (2), is positioned on natural ventilation air-cooling tower (1) X pillar, connect that air cooling tower tower is outer and the air intake duct (4) of tower；Multiple air intake ducts (4) are arranged at tower bottom around natural ventilation air-cooling tower (1).
The natural ventilation air-cooling tower of improvement anti-freezing property the most according to claim 1, it is characterised in that: described air intake duct (4) is positioned between soleplate and the ring group of natural ventilation air-cooling tower (1).
The natural ventilation air-cooling tower of improvement anti-freezing property the most according to claim 1, it is characterised in that: it is equipped with the removable cover (7) that can open and close on air intake duct air inlet (5) and air intake duct gas outlet (6).
The natural ventilation air-cooling tower of improvement anti-freezing property the most according to claim 3, it is characterised in that: described removable cover (7) is armored concrete, steel construction or battenboard.
The natural ventilation air-cooling tower of improvement anti-freezing property the most according to claim 1, it is characterised in that: described air intake duct (4) cross section is rectangle or circle.
6. according to the natural ventilation air-cooling tower improving anti-freezing property described in any one of claim 1-5, it is characterised in that: it is equipped with safety grids (8) on air intake duct air inlet (5) and air intake duct gas outlet (6).
7. according to the natural ventilation air-cooling tower improving anti-freezing property described in any one of claim 1-5, it is characterised in that: air intake duct gas outlet (6) are in tilted layout in tower.
8. according to the natural ventilation air-cooling tower improving anti-freezing property described in any one of claim 1-5, it is characterised in that: described natural ventilation air-cooling tower (1) is reinforced concrete structure or steel construction.
9. according to the natural ventilation air-cooling tower improving anti-freezing property described in any one of claim 1-5, it is characterized in that: described natural ventilation air-cooling tower (1) is for using surface condenser or the indirect air cooling system of direct-contact type condenser, or direct air cooling system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521031279.6U CN205448739U (en) | 2015-12-10 | 2015-12-10 | Improve frost resistance's natural draft air cooling tower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521031279.6U CN205448739U (en) | 2015-12-10 | 2015-12-10 | Improve frost resistance's natural draft air cooling tower |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205448739U true CN205448739U (en) | 2016-08-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521031279.6U Active CN205448739U (en) | 2015-12-10 | 2015-12-10 | Improve frost resistance's natural draft air cooling tower |
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| CN (1) | CN205448739U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110595224A (en) * | 2019-09-30 | 2019-12-20 | 北京首航艾启威节能技术股份有限公司 | Anti-freezing device and method for indirect air cooling column of thermal power plant |
-
2015
- 2015-12-10 CN CN201521031279.6U patent/CN205448739U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110595224A (en) * | 2019-09-30 | 2019-12-20 | 北京首航艾启威节能技术股份有限公司 | Anti-freezing device and method for indirect air cooling column of thermal power plant |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |