CN105716441A - Natural ventilation air-cooling tower with vertically-arranged radiator and adjustable effective draft force - Google Patents
Natural ventilation air-cooling tower with vertically-arranged radiator and adjustable effective draft force Download PDFInfo
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- CN105716441A CN105716441A CN201510919807.XA CN201510919807A CN105716441A CN 105716441 A CN105716441 A CN 105716441A CN 201510919807 A CN201510919807 A CN 201510919807A CN 105716441 A CN105716441 A CN 105716441A
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- air
- natural ventilation
- cooling tower
- radiator
- tower
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28B—STEAM OR VAPOUR CONDENSERS
- F28B1/00—Condensers in which the steam or vapour is separate from the cooling medium by walls, e.g. surface condenser
- F28B1/06—Condensers in which the steam or vapour is separate from the cooling medium by walls, e.g. surface condenser using air or other gas as the cooling medium
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention discloses a natural ventilation air-cooling tower with a vertically-arranged radiator and an adjustable effective draft force. The natural ventilation air-cooling tower with the vertically-arranged radiator and the adjustable effective draft force comprises a natural ventilation air-cooling tower, a vertical radiator or a steam condenser which is arranged along the outer circumference of the tower, a widening platform between the radiator or the steam condenser and the tower body of an inter-cooling tower, and intake windows opened in a sealing plate of the widening platform, wherein a movable sealing plate capable of being opened and closed is arranged on an intake port of each intake window; and the flow rate of air at the intake port of each intake window is adjusted through control for the movable sealing plate, and then the flow rate and the flow speed of air entering the tower through the radiator or the steam condenser are adjusted. The natural ventilation air-cooling tower with the vertically-arranged radiator and the adjustable effective draft force, which is disclosed by the invention, has the advantages of being simple in structure, large in adjustable amplitude of the effective draft force, flexible in anti-freezing measure adjustment means, low in coal consumption of winter power generation, high in economical efficiency, and the like. The natural ventilation air-cooling tower with the vertically-arranged radiator and the adjustable effective draft force, which is disclosed by the invention, can be used for anti-freezing reconstruction for both new constructions and the existing natural ventilation air-cooling systems.
Description
[technical field]
The invention belongs to industry Cooling Design field, relate to a kind of radiator and be arranged vertically the adjustable natural ventilation air-cooling tower of effective draft.
[background technology]
Thermal Power Station's indirect air 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 adopts and closes shutter outside radiator, exit part cooling sector with reduces participate in heat exchange the radiator gross area, improve in the measures such as recirculated water operation 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 run radiator blind after a period of time, it is very general 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！
Due to the situation ubiquity that cooling system pipeline valve between each power plant is not closed completely, less these antifreezing measures of employing in the actual winter operation of power plant；
3, the antifreezing measures the most practical, maximally effective that recirculated water operation in winter water temperature control limit is the actual employing of power plant adopting indirect air cooling system are improved.But recirculated water runs the raising of water temperature, can cause that turbine back pressure raises, boiler coal consumption increases, and economics of power generation is deteriorated.
Under lacking more effective, more reliable antifreeze means situation, power plant's actual motion is had to adopt this sacrifice generating set performance driving economy to exchange the operation reserve of a cooling system especially radiator safety for.
The whole tower draft of gravity-flow ventilation indirect dry cooling tower can be divided into two large divisions:
(1) lifting force of hot-air in tower
Tower outer cold air temperature after radiator 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 forming the convective flow of air.
In tower, the lifting force of hot-air accounts for the pith of the whole tower draft of cooling stack.
(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 ", the difference of flow velocity causes there is pressure difference between at the bottom of tower top and tower, 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 the whole tower draft of cooling stack (lifting force and inner suction), producing low-pressure area in tower, even if radiator blind completely closes, tower outer air also has through radiator to the trend of flowing in tower.Once shutter is not closed completely, cold air will be taken advantage of the crack and enter, and flows through heat radiator fin and takes away heat, can cause that radiator frost heave is damaged in the winter time in some cases.
The present invention is that the outer cold air of tower enters tower and provides controlled " shortcut ", large quantity of air is made directly to enter tower without by radiator " short circuit ", flow in tower to tower outer air lower resistance, improve the pressure of air in tower, tower inside and outside differential pressure is diminished, reducing and flow through radiator and enter air mass flow and the flow velocity of tower, reducing the heat exchange amount of radiator, thus improve the frost resistance of a cooling system.
[summary of the invention]
Present invention aim at providing a kind of radiator to be arranged vertically the adjustable natural ventilation air-cooling tower of effective draft, reduction flows through radiator and enters 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 used in the present invention is:
A kind of radiator is arranged vertically the adjustable natural ventilation air-cooling tower of effective draft, including natural ventilation air-cooling tower, along the vertically arranged radiator of natural ventilation air-cooling tower excircle, the broadening platform being positioned on natural ventilation air-cooling tower X pillar be arranged on broadening platform shrouding the air intake window communicated with tower；Sealed by broadening platform between described radiator top and natural ventilation air-cooling tower, air intake window air inlet is provided with the movable sealing plate opened and closed, regulate the air mass flow of air intake window air inlet by controlling movable sealing plate, and then adjustment flows through radiator and enters air mass flow and the flow velocity of tower.
Further, described movable sealing plate adopts top suspension or slidingtype, manually or electronic mode open and close.
Further, the air inlet of described air intake window is connected with wind-guiding side plate and the wind-guiding base plate of avoiding cold air directly to blow to radiator.
Further, described air intake window porch is provided with protective grille.
Further, the edge that described movable sealing plate contacts with air intake window air inlet is provided with sealing strip.
Further, described natural ventilation air-cooling tower is reinforced concrete structure or steel construction.
Further, described natural ventilation air-cooling tower adopts the indirect air cooling system of surface condenser or direct-contact type condenser or direct air cooling system.
Further, described air intake window air inlet is rectangle.
Further, described air intake window is arranged over awning.
Relative to prior art, the invention have the advantages that
The natural ventilation air-cooling tower of the present invention, along the vertically arranged radiator of natural ventilation air-cooling tower excircle, the broadening platform being positioned on natural ventilation air-cooling tower X pillar be arranged on broadening platform shrouding the air intake window communicated with tower, the outer cold air of tower enters tower from the air intake window " short circuit " being located at broadening platform shrouding, 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 reducing system back pressure, reducing boiler coal consumption, improving the economy that power plant runs.
Further, air intake window flexible arrangement, quantity is adjustable, and intake is big.
The present invention 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, can also be used for 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 is also possible in the vertically arranged gravity-flow ventilation direct air cooling system of condenser.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, reducing and flow through radiator or condenser enters air mass flow and the flow velocity of tower, reducing the heat exchange amount of radiator or condenser, thus improve the frost resistance of air cooling system.
For adopting 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.Adopt after the present invention, can opening section vent window in the winter time, reduce the effective draft of air cooling tower, improve the freezing tolerance of air cooling system.
[accompanying drawing explanation]
Fig. 1 is the floor map that the present invention uses state；
Fig. 2 is the three-dimensional oblique view that the present invention uses state；
Fig. 3 is principle of the invention figure, wherein:
Fig. 3 (a) does not use the natural ventilation air-cooling tower schematic diagram of the air cooling system of the present invention；
Fig. 3 (b) uses the natural ventilation air-cooling tower schematic diagram (louver(-vre) closed mode) of the air cooling system of the present invention；
Fig. 3 (c) uses the natural ventilation air-cooling tower schematic diagram (louver(-vre) opening) of the air cooling system of the present invention；
Fig. 4 is that air intake window of the present invention arranges schematic diagram；
Fig. 5 is air intake window 3-D view of the present invention；
Fig. 6 is air intake window exploded view of the present invention, wherein:
Fig. 6 (a) is the schematic diagram of protective grille；
Fig. 6 (b) is movable sealing plate schematic diagram able to turn on or off；
The schematic diagram of Fig. 6 (c) wind-guiding side plate and base plate；
Air intake window schematic diagram after Fig. 6 (d) assembling；
In figure: 1-natural ventilation air-cooling tower；2-radiator；3-broadening platform；4-air intake window；5-awning；6-protective grille；7-movable sealing plate；8-wind-guiding side plate；9-wind-guiding base plate.
[detailed description of the invention]
Below in conjunction with accompanying drawing, the present invention is described in further detail.
Referring to Fig. 1,2,4,5, a kind of radiator is arranged vertically the adjustable natural ventilation air-cooling tower of effective draft, including natural ventilation air-cooling tower 1, along the vertically arranged radiator 2 of tower excircle, radiator to the broadening platform 3 between air cooling tower tower body and perforate air intake window 4 on broadening platform sealing plate.
Natural ventilation air-cooling tower 1 is armored concrete or steel construction, and process system is that radiator adopts 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 on cooling tower periphery, radiator or adopt broadening platform 3 to seal sealing structure between Condenser Top and cooling tower；
Air intake window 4 is arranged on broadening platform 3, the air inlet perforate of air intake window 4 is on broadening platform sealing plate, it is provided with openable movable sealing plate 7, the air mass flow of air intake window 4 air inlet is regulated by controlling movable sealing plate 7, and then regulate and flow through radiator or condenser 2 enters air mass flow and the flow velocity of tower, such as Fig. 6 (b).
Movable sealing plate 7 adopts top suspension or slidingtype, manually or electronic mode open and close, movable sealing plate 7 can also serve as wind-guiding swash plate such as Fig. 6 (d) after opening, movable sealing plate and air intake window air inlet edge are provided with sealing strip, and the lower section of air inlet is additionally provided with wind-guiding side plate 8 and wind-guiding base plate 9 such as Fig. 6 (c)；
From the cold air that air intake window air inlet enters, led in tower by the wind deflector of lower section, it is to avoid cold air blows to radiator or condenser.
Described air intake window 4 porch is provided with protective grille 6, it is to avoid foreign material enter, as shown in Fig. 6 (a)；Air intake window 4 air inlet is rectangle；Air intake window 4 is also arranged above awning 5.
The present invention can be used in conjunction with other air cooling system antifreezing measures.
The present invention can be not only used for new construction, it is also possible in the antifreeze transformation of existing natural ventilation air-cooling tower.When for new construction, a number of air intake window is set during broadening Platform Designing；When for the technological transformation of existing engineering, remove the part shrouding of existing broadening platform, install a number of air intake window additional.
The present invention has the advantage such as simple in construction, flexible, low, the good economy performance of generating electricity in winter coal consumption of air cooling tower effective draft amplitude of accommodation measure regulating measure big, freeze proof.
The invention have the characteristics that:
(1) as it is shown on figure 3, Fig. 3 (a) is the air cooling system not using the present invention；Fig. 3 (b) is the air cooling system (louver(-vre) closed mode) using the present invention；Fig. 3 (c) is the air cooling system (louver(-vre) opening) using the present invention；By comparing it appeared that, radiator of the present invention is arranged vertically the adjustable natural ventilation air-cooling tower of effective draft, the outer cold air of tower enters tower from the air intake window " short circuit " being located at broadening platform shrouding, improve the pressure of air in tower, reduce tower inside and outside differential pressure, reducing and flow through radiator or condenser enters air mass flow and the flow velocity of tower, reducing the heat exchange amount of radiator or condenser, thus improve the frost resistance of air cooling system；
(2) due to an improvement for 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 reducing system back pressure, reducing boiler coal consumption, improving the economy that power plant runs.
(3) air intake window air intake passage section is big, and air mass flow is big, and the effect regulating effective draft is obvious；
(4) present invention 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 is also possible in two machine one tower air cooling system schemes.
Above content is further description made for the present invention; it cannot be assumed that the specific embodiment of the present invention is only limitted to this; for general technical staff of the technical field of the invention; without departing from the inventive concept of the premise; some simple deduction or replace can also be made, all should be considered as belonging to the present invention and be determined invention protection domain by submitted claims.
Claims (9)
1. a radiator is arranged vertically the adjustable natural ventilation air-cooling tower of effective draft, it is characterised in that: include natural ventilation air-cooling tower (1), along the vertically arranged radiator of natural ventilation air-cooling tower excircle (2), the broadening platform (3) being positioned on natural ventilation air-cooling tower X pillar be arranged on broadening platform (3) shrouding the air intake window (4) communicated with tower；
Described radiator (2) is sealed by broadening platform (3) between top and natural ventilation air-cooling tower, air intake window (4) air inlet is provided with the movable sealing plate (7) opened and closed, regulate the air mass flow of air intake window (4) air inlet by controlling movable sealing plate (7), and then adjustment flows through radiator (2) and enters air mass flow and the flow velocity of tower.
2. radiator according to claim 1 is arranged vertically the adjustable natural ventilation air-cooling tower of effective draft, it is characterised in that: described movable sealing plate (7) adopts top suspension or slidingtype, manually or electronic mode open and close.
3. radiator according to claim 1 is arranged vertically the adjustable natural ventilation air-cooling tower of effective draft, it is characterised in that: the air inlet of described air intake window (4) is connected with wind-guiding side plate (8) and the wind-guiding base plate (9) of avoiding cold air directly to blow to radiator (2).
4. radiator according to claim 1 is arranged vertically the adjustable natural ventilation air-cooling tower of effective draft, it is characterised in that: described air intake window (4) porch is provided with protective grille (6).
5. radiator according to claim 1 is arranged vertically the adjustable natural ventilation air-cooling tower of effective draft, it is characterised in that: the edge that described movable sealing plate (7) contacts with air intake window (4) air inlet is provided with sealing strip.
6. the radiator according to any one of claim 1-5 is arranged vertically the adjustable natural ventilation air-cooling tower of effective draft, it is characterised in that: described natural ventilation air-cooling tower (1) is reinforced concrete structure or steel construction.
7. the radiator according to any one of claim 1-5 is arranged vertically the adjustable natural ventilation air-cooling tower of effective draft, it is characterized in that: described natural ventilation air-cooling tower (1) adopts the indirect air cooling system of surface condenser or direct-contact type condenser or direct air cooling system.
8. the radiator according to any one of claim 1-5 is arranged vertically the adjustable natural ventilation air-cooling tower of effective draft, it is characterised in that: described air intake window (4) air inlet is rectangle.
9. the radiator according to any one of claim 1-5 is arranged vertically the adjustable natural ventilation air-cooling tower of effective draft, it is characterised in that: described air intake window (4) is arranged over awning (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510919807.XA CN105716441A (en) | 2015-12-10 | 2015-12-10 | Natural ventilation air-cooling tower with vertically-arranged radiator and adjustable effective draft force |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510919807.XA CN105716441A (en) | 2015-12-10 | 2015-12-10 | Natural ventilation air-cooling tower with vertically-arranged radiator and adjustable effective draft force |
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| CN105716441A true CN105716441A (en) | 2016-06-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510919807.XA Pending CN105716441A (en) | 2015-12-10 | 2015-12-10 | Natural ventilation air-cooling tower with vertically-arranged radiator and adjustable effective draft force |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107328292A (en) * | 2017-08-15 | 2017-11-07 | 中国电力工程顾问集团西北电力设计院有限公司 | Gravity-flow ventilation dry cooling tower self-supporting broadening platform |
| CN110057204A (en) * | 2019-05-30 | 2019-07-26 | 华北电力大学（保定） | A kind of Hai Leshi air cooling tower |
| CN110671947A (en) * | 2019-10-17 | 2020-01-10 | 双良节能***股份有限公司 | Natural ventilation air cooling system and method for generating power by utilizing exhaust waste heat |
| CN111486467A (en) * | 2020-05-26 | 2020-08-04 | 西安热工研究院有限公司 | System and method for increasing efficiency of air cooling tower by using flue gas waste heat |
| CN111578736A (en) * | 2020-05-18 | 2020-08-25 | 中国电力工程顾问集团西北电力设计院有限公司 | Heat absorption tower with natural ventilation cooling function |
| CN112304109A (en) * | 2020-10-30 | 2021-02-02 | 陕西能源赵石畔煤电有限公司 | Indirect air cooling tower device for million units of power station |
| CN112683077A (en) * | 2020-12-25 | 2021-04-20 | 山西德望节能科技有限公司 | Energy-saving natural convection air cooling tower |
| CN113670087A (en) * | 2021-09-06 | 2021-11-19 | 神华国能宁夏鸳鸯湖发电有限公司 | Partial pressure anti-freezing device and method for indirect air cooling tower |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107328292A (en) * | 2017-08-15 | 2017-11-07 | 中国电力工程顾问集团西北电力设计院有限公司 | Gravity-flow ventilation dry cooling tower self-supporting broadening platform |
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| CN110057204A (en) * | 2019-05-30 | 2019-07-26 | 华北电力大学（保定） | A kind of Hai Leshi air cooling tower |
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| CN110671947A (en) * | 2019-10-17 | 2020-01-10 | 双良节能***股份有限公司 | Natural ventilation air cooling system and method for generating power by utilizing exhaust waste heat |
| CN111578736A (en) * | 2020-05-18 | 2020-08-25 | 中国电力工程顾问集团西北电力设计院有限公司 | Heat absorption tower with natural ventilation cooling function |
| CN111486467A (en) * | 2020-05-26 | 2020-08-04 | 西安热工研究院有限公司 | System and method for increasing efficiency of air cooling tower by using flue gas waste heat |
| CN112304109A (en) * | 2020-10-30 | 2021-02-02 | 陕西能源赵石畔煤电有限公司 | Indirect air cooling tower device for million units of power station |
| CN112683077A (en) * | 2020-12-25 | 2021-04-20 | 山西德望节能科技有限公司 | Energy-saving natural convection air cooling tower |
| CN112683077B (en) * | 2020-12-25 | 2022-10-25 | 山西德望节能科技有限公司 | Energy-saving natural convection air cooling tower |
| CN113670087A (en) * | 2021-09-06 | 2021-11-19 | 神华国能宁夏鸳鸯湖发电有限公司 | Partial pressure anti-freezing device and method for indirect air cooling tower |
| CN113670087B (en) * | 2021-09-06 | 2024-04-26 | 神华国能宁夏鸳鸯湖发电有限公司 | Partial pressure anti-freezing device and method for indirect air cooling tower |
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Application publication date: 20160629 |