CN105783572A - Air guide device for air cooling tower of indirect air cooling unit - Google Patents
Air guide device for air cooling tower of indirect air cooling unit Download PDFInfo
- Publication number
- CN105783572A CN105783572A CN201610252226.XA CN201610252226A CN105783572A CN 105783572 A CN105783572 A CN 105783572A CN 201610252226 A CN201610252226 A CN 201610252226A CN 105783572 A CN105783572 A CN 105783572A
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- air cooling
- air
- cooling tower
- deflector
- guide device
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- 238000001816 cooling Methods 0.000 title claims abstract description 90
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 22
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 239000000498 cooling water Substances 0.000 description 8
- 229910000831 Steel Inorganic materials 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 238000004458 analytical method Methods 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 3
- 230000005855 radiation Effects 0.000 description 3
- 238000004088 simulation Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000002528 anti-freeze Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000003134 recirculating effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000010977 unit operation Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/22—Arrangements for directing heat-exchange media into successive compartments, e.g. arrangements of guide plates
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/24—Arrangements for promoting turbulent flow of heat-exchange media, e.g. by plates
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluid Mechanics (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention discloses an air guide device for an air cooling tower of an indirect air cooling unit. The guide plate group and the tangent of the outer edge of the radiator at the bottom of the air cooling tower form a certain angle A (the angle changes along with the change of the environmental wind direction). When the environment wind blows, the device adjusts the angle A according to the environment wind direction, thereby forms a vortex with the air water conservancy diversion of environment for cooling air is comparatively even in each sector distribution of radiator, strengthens the convection current of cooling air and finned tube. And, the vortex flow weakens the intensity of the cross-over wind to some extent. The air guide device weakens the influence of environmental wind on the thermal performance of the air cooling tower on the whole, and improves the economical efficiency and the safety of the indirect air cooling unit.
Description
[technical field]
The invention belongs to thermal energy exchange and air force field, relate to a kind of indirect dry cooling tower, specifically a kind of air guide device for indirect air cooling unit air cooling tower.
[background technology]
Prospect of Utility Air Cooling is as when the effective water-saving thermal power generating technology of former, and the extensive use in the power industry in the comparatively deficient area of water resource is trend of the times.Looking forward to the future, Electric Factory Air-Cooling technical prospect is still had an optimistic view of, and it can not only be applied to water-deficient area, even if the area abundant at water source, from the angle reducing water resources consumption, promotion sustainable utilization of water resource, it may have very high actual application value.
The air cooling system being currently used in power plant mainly has three kinds: the indirect air cooling system (Harmon formula) of direct air cooling system, indirect air cooling system (Hai Leshi) with direct-contact type condenser and belt surface formula condenser.
Direct air cooling system water-saving result is the most notable, but heat-economy is relatively poor, " changing water with coal " is its marked feature, the summer high temperature period is especially pronounced: when Direct Air-cooled Unit is run under summer high temperature high back pressure, and prominent next environment strong wind can cause unit back pressuce suddenly to increase even generation chaser accident completely.
The prevention ability of hot blast in summer is better than direct air cooling system by indirect air cooling system, have noise little, by advantages such as the big wind effect of environment are less.Fig. 1 be domestic commonly used between cooling system schematic flow sheet (SCAL type).
SCAL type indirect air cooling system and conventional humid-cool system basic simlarity, be different in that a cooling system adopts dry cooling tower to substitute cooling stack, substitute recirculated water with demineralized water, replace substituting recirculating cooling water system by Enclosed Type Circulating Cooling Water System.During cooling water temperature change, volume also changes, therefore expansion tank need to be set, tank top is connected with rushing nitrogen system, the change redeeming that the nitrogen of certain pressure both can be long-pending to cooling water body, cooling water also can be made to avoid and air contact, thus ensureing the water quality of cooling water.Water storage tank and two water pumps it are provided with bottom cooling tower, can to the air cooling heat radiator water-filling in cooling tower.Air cooling heat radiator is arranged vertically on air cooling tower periphery, and radiator is made up of the outer tube bank around oval steel fin or nested rectangle steel fin of oval steel pipe.Oval steel pipe and outside fin all carry out the overall zinc-plated process of outer surface.Radiator is arranged in dry and cold tower, and whole system adopts natural ventilation system cooling.
Relevant service data and performance test results show, ambient wind affect the static pressure of each sector air inlet by changes of wind angle, thus between the generation of cooling system performance affect.The change of air inlet pressure makes each sector intake different, and the leaving water temperature of corresponding sector also changes, thus the overall outlet water temperature of indirect cool tower and unit back pressuce change.Correlation values calculates and performance test results shows, the minimum sector of outlet water temperature is always at windward side sector, and the highest sector of outlet water temperature is at trailing flank sector.
Ambient wind velocity between cooling system impact clearly, in tower, temperature field, tower external and internal pressure field change greatly with wind speed.Although ambient wind velocity increases, the intake of windward side sector increases, and leaving water temperature reduces, and heat-sinking capability increases.But the intake of side sector reduces more, and owing to ambient wind velocity increases the resistance to flow output increase at indirect cool tower top so that the suction capactity of air cooling tower reduces.Reducing additionally, the existence of local draught may also cause tower interior-heat fraction of airflow, atmospheric density subtractive is little, and the motive force of corresponding free convection reduces.Therefore when ambient wind velocity increases, the integral heat sink ability of indirect cool tower reduces, and unit back pressuce increases.Especially, during strong wind, cooling tower integral heat sink ability offsets rapidly, and back pressure steeply rises, and has a strong impact on unit operation economy and safety.
[summary of the invention]
It is an object of the invention to solve the problems referred to above, a kind of air guide device for indirect air cooling unit air cooling tower is provided, this device can make each covering of the fan intake difference of air cooling tower reduce, and reduces outlet water temperature, and reduces the horizontal draught impact on air cooling tower overall performance.The safety in operation of the final group of motors of hoist-hole sending and receiving on the whole and economy.
For reaching above-mentioned purpose, the present invention is achieved by the following technical solutions:
A kind of air guide device for indirect air cooling unit air cooling tower, including the some deflectors being arranged around air cooling tower bottom heat spreader outer rim, deflector is circumferentially uniformly distributed, spacing between adjacent two panels deflector is 5m～10m, angle between every deflector and air cooling tower bottom heat spreader outer rim tangent line 30 °～90 °, and can be adjusted according to the change of environment wind direction.
The present invention is further improved by:
Described every deflector is vertically built into by armored concrete.
The height of described every deflector is identical with the height of air cooling heat radiator.
Described deflector is connected with controller, according to the angle between air intake angle adjustment deflector and air cooling tower bottom heat spreader outer rim tangent line, makes air intake vertical with radiator outer rim tangent line all the time.
Compared with prior art, the method have the advantages that
The present invention is for the air guide device of indirect air cooling unit air cooling tower, deflector is angled with air cooling tower bottom heat spreader outer rim tangent line, incoming flow is cooled down air conducting and forms eddy current, make cooling air comparatively uniform at each sector of dry Cooling heat radiator especially rear side sector distribution, improve cooling air flow through finned tube around intensity of flow, strengthen fluid interchange characteristic, so that respectively heat radiation sector leaving water temperature diversity reduces.And the formation of this eddy current reduces the intensity of horizontal draught to a certain extent, decrease because of the probability of the draught interruption of service such as cause that unit back pressuce is ascended to heaven.
[accompanying drawing explanation]
Fig. 1 is the air cooling system schematic flow sheet of conventional belt surface condenser；
Fig. 2 is the overall structure schematic diagram of the present invention.
Wherein: 1 is boiler；2 is superheater；3 is steam turbine；4 is surface condenser；5 is condensate pump；6 is precision processing device of condensation water；7 is condensate booster pump；8 is low-pressure heater；9 is oxygen-eliminating device；10 is feed pump；11 is high-pressure heater；12 is water circulating pump；13 is expansion tank；14 is all-steel radiator；15 is air cooling tower；16 is tramp iron separator；17 is electromotor；18 is deflector；A is deflector and dry Cooling heat radiator tangent line angle；S is the spacing of adjacent baffle.
[detailed description of the invention]
Below in conjunction with accompanying drawing, the present invention is described in further detail:
Referring to Fig. 2, the present invention includes the some deflectors 18 being arranged around air cooling tower 15 bottom heat spreader outer rim, deflector 18 is circumferentially uniformly distributed, spacing between adjacent two panels deflector 18 is S, spacing by air cooling tower outer perimeter according to deflector number decile (for 600MW grade indirect cool tower, spacing is between 5m～10m, finally determined by numerical simulation and theoretical analysis and calculation), angle between every deflector 18 and air cooling tower 15 bottom heat spreader outer rim tangent line is A, A is 30 °～90 °, and can be adjusted according to the change of environment wind direction.Every deflector 18 is vertically built into by armored concrete.The height of every deflector 18 is identical with the height of air cooling heat radiator.The relation of the angle between environment wind direction and deflector 18 and air cooling tower 15 bottom heat spreader outer rim tangent line is determined according to numerical simulation and theoretical analysis and calculation, and is installed in the control program of air guide device.
Principles of the invention:
The present invention is applied to indirect cool tower, is made up of some deflectors, and deflector is arranged around outside air cooling tower, contour with air cooling heat radiator.Deflector is vertically built into by armored concrete, has streamlined feature.The present invention and the air cooling tower bottom heat spreader angled A of outer rim tangent line (less than 90 °, and around air cooling tower heat radiation sector angle difference), this angle A changes along with the change of environment wind direction, has self regulating charactoristic.The summer high temperature period, leading environment wind blows to dry Cooling heat radiator with certain speed at a certain angle, this air guide device is according to the optimal control program carried, adjust the angle A of deflector and air cooling tower bottom heat spreader outer rim tangent line, incoming flow is cooled down air conducting and forms eddy current, make cooling air comparatively uniform at each sector of dry Cooling heat radiator especially rear side sector distribution, improve cooling air flow through finned tube around intensity of flow, strengthen fluid interchange characteristic, so that respectively heat radiation sector leaving water temperature diversity reduces.Further, the formation of this eddy current reduces the intensity of horizontal draught to a certain extent, decreases because of the probability of the draught interruption of service such as cause that unit back pressuce is ascended to heaven.Additionally, this air guide device can also improve the antifreeze ability that dry Cooling heat radiator is extremely trembled with fear strong wind period in the winter time.Comprehensively, this air guide device can reduce cooling water tower exit temperature, promotes indirect Air-cooled Unit economy and safety.Can be widely used in the technological transformation of existing air cooling tower.
When designing the angle of deflector:
First, collection of data: the on-site Meteorological Characteristics of indirect air cooling unit and environmental condition, it is important that winter or summer and annual wind direction frequency statistics；The structural parameters of air cooling tower and surrounding building.
Secondly, field performance is tested, and carries out air cooling tower performance diagnogtics, it is determined that the gap of air cooling tower overall performance and design certified value.
Finally, numerical simulation and theoretical analysis and calculation combine, determine air guide device optimum deflector angle and spacing that each environment wind direction is corresponding, and be installed in the control program of air guide device, it is achieved the air guide device self regulating charactoristic according to environment wind direction.
Application effect:
600MW indirect air cooling unit, under summer operating mode at full capacity, applies this air guide device, and recirculated cooling water tower exit temperature can reduce about 0.3 DEG C.
Above content is only the technological thought that the present invention is described, it is impossible to limits protection scope of the present invention, every technological thought proposed according to the present invention, any change done on technical scheme basis with this, each falls within the protection domain of claims of the present invention.
Claims (4)
1. the air guide device for indirect air cooling unit air cooling tower, it is characterized in that, including the some deflectors (18) being arranged around air cooling tower (15) bottom heat spreader outer rim, deflector (18) is circumferentially uniformly distributed, spacing between adjacent two panels deflector (18) is 5m～10m, angle between every deflector (18) and air cooling tower (15) bottom heat spreader outer rim tangent line 30 °～90 °, and can be adjusted according to the change of environment wind direction.
2. the air guide device for indirect air cooling unit air cooling tower according to claim 1, it is characterised in that described every deflector (18) is vertically built into by armored concrete.
3. the air guide device for indirect air cooling unit air cooling tower according to claim 1 and 2, it is characterised in that the height of described every deflector (18) is identical with the height of air cooling heat radiator.
4. the air guide device for indirect air cooling unit air cooling tower according to claim 1, it is characterized in that, described deflector (18) is connected with controller, according to the angle between air intake angle adjustment deflector (18) and air cooling tower (15) bottom heat spreader outer rim tangent line, make air intake vertical with radiator outer rim tangent line all the time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610252226.XA CN105783572A (en) | 2016-04-21 | 2016-04-21 | Air guide device for air cooling tower of indirect air cooling unit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610252226.XA CN105783572A (en) | 2016-04-21 | 2016-04-21 | Air guide device for air cooling tower of indirect air cooling unit |
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| CN105783572A true CN105783572A (en) | 2016-07-20 |
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| CN201610252226.XA Pending CN105783572A (en) | 2016-04-21 | 2016-04-21 | Air guide device for air cooling tower of indirect air cooling unit |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106643273A (en) * | 2016-12-28 | 2017-05-10 | 上海电气斯必克工程技术有限公司 | Air guide device for indirect air cooling tower and control method thereof |
| CN106952980A (en) * | 2017-05-16 | 2017-07-14 | 广东大粤新能源科技股份有限公司 | Strong cooled photovoltaic power generation plate |
| CN108088304A (en) * | 2018-01-18 | 2018-05-29 | 西安热工研究院有限公司 | The air guide device of horizontally disposed small-sized air cooling tower in a kind of radiator tower |
| CN110057204A (en) * | 2019-05-30 | 2019-07-26 | 华北电力大学（保定） | A kind of Hai Leshi air cooling tower |
| CN111457779A (en) * | 2020-04-30 | 2020-07-28 | 济南蓝辰能源技术有限公司 | Indirect air cooling air guide system capable of changing radial direction into different angles |
| CN111998250A (en) * | 2020-08-10 | 2020-11-27 | 博尔博公司 | High-efficient heat dissipation module lamps and lanterns |
| CN112762724A (en) * | 2021-01-13 | 2021-05-07 | 暨南大学 | Active flow field reconstruction method |
| CN112902694A (en) * | 2021-03-03 | 2021-06-04 | 山东大学 | Indirect air cooling tower for improving cooling effect |
| CN118089465A (en) * | 2024-04-28 | 2024-05-28 | 哈尔滨空调股份有限公司 | Single-grid hyperbolic steel structure air cooling tower air guide system |
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| CN1598464A (en) * | 2004-08-31 | 2005-03-23 | 山东大学 | Rectification system with wing type air guiding plate at air intake of bottom of cooling tower |
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| RU2582031C1 (en) * | 2015-06-09 | 2016-04-20 | Александр Алексеевич Соловьев | Aerodynamic cooling tower with external heat exchange |
| CN205642115U (en) * | 2016-04-21 | 2016-10-12 | 华能国际电力股份有限公司 | Air guide device for air cooling tower of indirect air cooling unit |
-
2016
- 2016-04-21 CN CN201610252226.XA patent/CN105783572A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1598464A (en) * | 2004-08-31 | 2005-03-23 | 山东大学 | Rectification system with wing type air guiding plate at air intake of bottom of cooling tower |
| CN201653251U (en) * | 2010-01-18 | 2010-11-24 | 张云龙 | Cooling tower |
| CN201903284U (en) * | 2010-12-20 | 2011-07-20 | 中国电力工程顾问集团科技开发有限公司 | Multifunctional composite air intake control device for counter flow type natural draft cooling tower |
| CN202420221U (en) * | 2011-11-30 | 2012-09-05 | 华北电力大学 | Ambient wind field flow guide device outside vertically arranged air-cooled radiator |
| CN203274579U (en) * | 2013-04-27 | 2013-11-06 | 北京朗润源泉科技有限公司 | Air inlet face air ducting of waste steam indirect air cooling tower of power station steam turbine |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106643273A (en) * | 2016-12-28 | 2017-05-10 | 上海电气斯必克工程技术有限公司 | Air guide device for indirect air cooling tower and control method thereof |
| CN106952980A (en) * | 2017-05-16 | 2017-07-14 | 广东大粤新能源科技股份有限公司 | Strong cooled photovoltaic power generation plate |
| CN108088304A (en) * | 2018-01-18 | 2018-05-29 | 西安热工研究院有限公司 | The air guide device of horizontally disposed small-sized air cooling tower in a kind of radiator tower |
| CN108088304B (en) * | 2018-01-18 | 2024-03-08 | 西安热工研究院有限公司 | Air guiding device of small air cooling tower horizontally arranged in radiator tower |
| CN110057204B (en) * | 2019-05-30 | 2024-02-09 | 华北电力大学（保定） | Sea-tangle type air cooling tower |
| CN110057204A (en) * | 2019-05-30 | 2019-07-26 | 华北电力大学（保定） | A kind of Hai Leshi air cooling tower |
| CN111457779B (en) * | 2020-04-30 | 2022-02-18 | 济南蓝辰能源技术有限公司 | Indirect air cooling air guide system capable of changing radial direction into different angles |
| CN111457779A (en) * | 2020-04-30 | 2020-07-28 | 济南蓝辰能源技术有限公司 | Indirect air cooling air guide system capable of changing radial direction into different angles |
| CN111998250A (en) * | 2020-08-10 | 2020-11-27 | 博尔博公司 | High-efficient heat dissipation module lamps and lanterns |
| CN112762724A (en) * | 2021-01-13 | 2021-05-07 | 暨南大学 | Active flow field reconstruction method |
| CN112902694A (en) * | 2021-03-03 | 2021-06-04 | 山东大学 | Indirect air cooling tower for improving cooling effect |
| CN118089465A (en) * | 2024-04-28 | 2024-05-28 | 哈尔滨空调股份有限公司 | Single-grid hyperbolic steel structure air cooling tower air guide system |
| CN118089465B (en) * | 2024-04-28 | 2024-07-12 | 哈尔滨空调股份有限公司 | Single-grid hyperbolic steel structure air cooling tower air guide system |
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Application publication date: 20160720 |
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