CN112484526A - Natural ventilation cooling tower with synergistic effect of internal booster fan and comprehensive synergistic technology - Google Patents
Natural ventilation cooling tower with synergistic effect of internal booster fan and comprehensive synergistic technology Download PDFInfo
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- CN112484526A CN112484526A CN202011358908.1A CN202011358908A CN112484526A CN 112484526 A CN112484526 A CN 112484526A CN 202011358908 A CN202011358908 A CN 202011358908A CN 112484526 A CN112484526 A CN 112484526A
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- 238000001816 cooling Methods 0.000 title claims abstract description 141
- 230000002195 synergetic effect Effects 0.000 title claims abstract description 37
- 238000009423 ventilation Methods 0.000 title claims abstract description 33
- 238000005516 engineering process Methods 0.000 title claims abstract description 21
- 238000005192 partition Methods 0.000 claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 30
- 238000012856 packing Methods 0.000 claims description 7
- 238000005057 refrigeration Methods 0.000 claims description 4
- 239000000126 substance Substances 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 16
- 238000000034 method Methods 0.000 abstract description 16
- 239000000945 filler Substances 0.000 abstract description 10
- 230000002411 adverse Effects 0.000 abstract description 5
- 230000008569 process Effects 0.000 abstract description 3
- 239000003570 air Substances 0.000 description 52
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 238000005457 optimization Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 239000012080 ambient air Substances 0.000 description 2
- 238000003889 chemical engineering Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28C—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA COME INTO DIRECT CONTACT WITHOUT CHEMICAL INTERACTION
- F28C1/00—Direct-contact trickle coolers, e.g. cooling towers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F25/00—Component parts of trickle coolers
- F28F25/10—Component parts of trickle coolers for feeding gas or vapour
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F27/00—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus
- F28F27/003—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus specially adapted for cooling towers
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- General Engineering & Computer Science (AREA)
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- Thermal Sciences (AREA)
- Ventilation (AREA)
Abstract
本发明涉及一种内部助力风机和综合增效技术协同作用的自然通风冷却塔，包括冷却塔的塔体、塔内除水器，在除水器上方设置助力风机。塔内助力风机运行方式、布置方式布置数量等和冷却塔的运行工况优化控制，并采用4种增效结构与风机组合使用：(1)与进风口导风板结合；(2)与雨区导风管结合；(3)与雨区十字隔墙结合；(4)与填料的优化布置结合。具体实施过程中，根据冷却塔的具体形式，这四种具体结构可以使用一种或者几种同时使用，也可以全部同时使用。该技术可提高冷却塔通风量，增加塔内空气动力场均匀性，降低侧风的不利影响，大幅度增加冷却塔的冷却负荷，满足增大冷却塔负荷后的冷却塔冷效的要求，同时还可以减少助力风机的电耗。
The invention relates to a natural ventilation cooling tower with synergistic effect of an internal booster fan and a comprehensive efficiency enhancement technology. The operation mode, arrangement number, etc. of the booster fans in the tower and the operating conditions of the cooling tower are optimized and controlled, and 4 types of efficiency-enhancing structures are used in combination with the fans: (1) combined with the air inlet deflector; (2) combined with the rain (3) Combined with the cross partition wall in the rain area; (4) Combined with the optimized arrangement of the filler. In the specific implementation process, according to the specific form of the cooling tower, one or more of these four specific structures can be used at the same time, or all of them can be used at the same time. This technology can improve the ventilation volume of the cooling tower, increase the uniformity of the aerodynamic field in the tower, reduce the adverse effects of cross-winds, greatly increase the cooling load of the cooling tower, and meet the requirements of cooling tower cooling efficiency after increasing the cooling tower load. It can also reduce the power consumption of the booster fan.
Description
Technical Field
The invention belongs to the technical field of cooling towers, and particularly relates to a natural ventilation cooling tower with an internal booster fan and a comprehensive synergistic technology, which adopts synergistic technical measures such as an air deflector, an air guide pipe, a cross partition wall, optimized arrangement of fillers and the like to cooperate with the booster fan on the basis of arranging the booster fan in the cooling tower and optimizing the operation, so as to complete cooling capacity increase of the cooling tower and improve the cooling effect. The method can be used for newly building a natural draft cooling tower and can also be used for reconstructing the natural draft cooling tower.
Background
The information in this background section is only for enhancement of understanding of the general background of the invention and is not necessarily to be construed as an admission or any form of suggestion that this information forms the prior art that is already known to a person of ordinary skill in the art.
The natural draft cooling tower is widely applied to the fields of electric power, chemical engineering, refrigeration and the like. The natural draft cooling tower is an important cooling device, and the main cooling parts are as follows: water distribution area, filler area and rain zone. The main working process of the natural draft cooling tower is as follows: circulating water (hot water) is sent into a water distribution system of the cooling tower through a vertical shaft, the water distribution system uniformly distributes the circulating water to each spray nozzle, and the circulating water is sprayed out of the spray nozzles in a water drop mode and falls to the upper surface of the filler; circulating water forms a water film along the filler and flows to the lower surface of the filler; leaving the lower surface of the packing, the packing continues to fall down to the sump in the form of water droplets. Ambient air enters the tower from the air inlet under the action of the suction force in the tower, passes through the rain area, the filling area and the water distribution area and flows out from the outlet of the tower top.
The natural draft cooling tower is as the main cold junction equipment of generating set, and its operating efficiency height directly influences power plant electric energy output and running cost. The low-efficiency operation of the cooling tower can lead to the rising of the temperature of the outlet water of the cooling tower, reduce the working efficiency of the whole cold-end unit, improve the coal consumption of unit power generation and increase the operation cost.
The natural ventilation cooling tower is large in size, and ambient air hardly enters a central area of the tower, so that air distribution in the tower is extremely uneven, air-water distribution at different positions is large in difference, and an aerodynamic field in the tower is uneven in distribution.
When the outside crosswind increases, the air intake of the cooling tower can be reduced, the cross-over wind in a rain area increases, and the uneven degree of the aerodynamic field in the tower increases.
When the external environment temperature rises, the outlet water temperature of the cooling tower also rises, so that the operation requirement of the host can not be met, and the operation of the host is influenced.
When the external environment humidity is increased, the evaporation heat transfer capacity is rapidly reduced, so that the cooling effect of the cooling tower is reduced.
In addition, the cooling load of the cooling tower is limited to the ventilation capacity of the cooling tower, and cannot be increased significantly.
In order to improve the performance of the cooling tower and increase the cooling capacity of the cooling tower, a power-assisted ventilation fan is additionally arranged in the cooling tower. Although the ventilation quantity can be increased and the cooling load of the cooling tower can be increased, the cooling requirement still cannot be met under certain working conditions, such as high temperature, high humidity environment, high side wind and the like, and the normal operation of the main machine is influenced. In addition, the long-term full load operation of the booster fan also increases the power consumption.
Disclosure of Invention
Aiming at the problems in the prior art, the invention aims to provide a natural draft cooling tower with an internal booster fan and a comprehensive synergistic technology, which can greatly improve the cooling effect and meet the cooling requirement under some extreme working conditions.
In order to achieve the technical purpose, the invention adopts the following technical scheme:
in a first aspect of the present invention, there is provided a natural draft cooling tower with an internal booster fan and a comprehensive synergistic technique, comprising: a cooling tower, a dehydrator and a booster fan; a dehydrator is arranged at the lower part of the cooling tower, and a booster fan is arranged above the dehydrator;
at least one of the following synergistic structures is also arranged in the cooling tower:
1) a plurality of air deflectors are circumferentially arranged at the air inlet of the cooling tower and extend outwards from the air inlet;
2) a rain area is arranged in the cooling tower, and a plurality of air guide pipes are arranged in the circumferential direction of the rain area of the cooling tower;
3) a cross partition wall is arranged in the area corresponding to the air inlet of the cooling tower;
4) the packing of the cooling tower adopts unequal height arrangement or unequal resistance arrangement.
The invention provides a natural ventilation cooling tower with an internal booster fan and a comprehensive synergistic technology in synergistic action, aiming at cooling capacity increase and synergy of the natural ventilation cooling tower. By adopting the scheme of the synergistic structure and the optimized configuration of the booster fan, the ventilation volume in the tower can be increased, the adverse effect of side wind is reduced, the heat and mass transfer between air and water in the center area of the cooling tower is enhanced, the uniformity of an air power field in the tower is improved, the cold efficiency is improved, and the power consumption of the booster fan is reduced. Compared with the original tower, the efficiency-increasing technology can increase the circulating water quantity to 1.5-2 times of the original circulating water quantity.
In a second aspect of the invention, there is provided a power plant cooling system comprising: any of the natural draft cooling towers described above.
The natural ventilation cooling tower provided by the invention is used as main cold-end equipment of the generator set, has high operation efficiency, can effectively reduce the influence on the electric energy output of a power plant, and reduces the operation cost.
In a third aspect of the invention, there is provided the use of any one of the natural draft cooling towers described above in the fields of electricity, chemical industry and refrigeration.
By adopting the scheme of the synergistic structure and the optimized configuration of the booster fan, the ventilation volume in the tower is effectively increased, the adverse effect of side wind is reduced, the heat and mass transfer between air and water in the central area of the cooling tower is enhanced, the uniformity of an air power field in the tower is improved, the cooling efficiency is improved, and the power consumption of the booster fan is reduced, so that the cooling tower is expected to be widely applied to the fields of electric power, chemical engineering and refrigeration.
The invention has the beneficial effects that:
(1) the invention provides a natural ventilation cooling tower with an internal booster fan and a comprehensive synergistic technology in synergistic action, aiming at cooling capacity increase and synergy of the natural ventilation cooling tower. By adopting the scheme of the synergistic structure and the optimized configuration of the booster fan, the ventilation volume in the tower can be increased, the adverse effect of side wind is reduced, the heat and mass transfer between air and water in the center area of the cooling tower is enhanced, the uniformity of an air power field in the tower is improved, the cold efficiency is improved, and the power consumption of the booster fan is reduced. Compared with the original tower, the efficiency-increasing technology can increase the circulating water quantity to 1.5-2 times of the original circulating water quantity. The number, the position, the power and the rotating speed of the ventilation fans are optimally controlled and optimally arranged, so that the limited ventilation fans can be realized, and the maximum synergistic effect is exerted. The air deflector and the booster fan jointly act, so that air can be uniformly fed into the air inlet in the circumferential direction, and the effect of the draught fan can be fully exerted. The air guide pipe and the booster fan jointly act, so that an air field inside the cooling tower is uniform, and the effect of the draught fan is fully exerted. The combined action of the cross partition wall and the power-assisted fan eliminates the through air in the cooling tower, and the effect of the induced draft fan can be fully exerted. The comprehensive synergistic measures can ensure the cooling effect after the cooling load of the cooling tower is increased.
(2) The invention has simple structure/method, convenient operation, strong practicability and easy popularization.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.
FIG. 1 is a schematic structural diagram of a fan and air deflector combination of a natural draft cooling tower enhancement technique according to example 1 of the present invention;
FIG. 2 is a top view of a fan and air deflection assembly, which is a natural draft cooling tower enhancement technique, according to example 1 of the present invention;
FIG. 3 is a schematic view of a fan and air duct combination structure of a natural draft cooling tower enhancement technique according to example 2 of the present invention;
FIG. 4 is a top view of a fan and air duct assembly, which is a natural draft cooling tower enhancement technique, according to example 2 of the present invention;
FIG. 5 is a schematic structural view of a fan and a cruciform baffle combination, a natural draft cooling tower enhancement technique according to example 3 of the present invention;
FIG. 6 is a top view of a fan and a cruciform baffle combination as a natural draft cooling tower enhancement technique according to example 3 of this invention;
the system comprises a cooling tower body 1, a dehydrator 2, a water distribution system 3, a filler 4, a rain area 5, a fan arrangement plane 6, an air deflector 7, a fan 8, an air guide pipe 9 and a cross partition wall 10.
Detailed Description
It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the invention as claimed. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
For convenience of description, the words "up", "down", "left" and "right" in the present invention, if any, merely indicate that the directions of movement are consistent with those of the drawings, and do not limit the structure, but merely facilitate the description of the invention and simplify the description, rather than indicate or imply that the referenced device or element needs to have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention.
The terms "mounted", "connected", "fixed", and the like in the present invention are to be understood in a broad sense, and may be, for example, fixedly connected, detachably connected, or integrated; the two components can be connected mechanically or electrically, directly or indirectly through an intermediate medium, or connected internally or in an interaction relationship, and the terms used in the present invention should be understood as having specific meanings to those skilled in the art.
A natural ventilation cooling tower with an internal booster fan and a comprehensive synergistic technology, which act synergistically, comprises a tower body of the cooling tower and a dehydrator in the tower, wherein the booster fan is arranged above the dehydrator. The fans in the tower adopt the technical method of cooperative optimization control of operation mode, arrangement quantity and the like, external crosswind and an aerodynamic field in the tower, and adopt the following 4 synergistic structures to be combined with the fans for use: (1) is combined with the air inlet air deflector; (2) is combined with the rain area air guide pipe; (3) is combined with a rain area cross partition wall; (4) in combination with an optimized arrangement of the packing. In the specific implementation process, one or more of the four specific structures can be used at the same time or all the four specific structures can be used at the same time according to the specific form of the cooling tower.
Under the condition that one or more synergistic structures are used at the same time, the booster fan in the cooling tower adopts an optimized control technology so as to exert the cooling effect of the synergistic structure to the maximum extent, reduce the power of the booster fan and save the power consumption of the booster fan.
In some embodiments, the operation mode, the arrangement quantity and the like of the booster fans in the tower are cooperatively and optimally controlled with the operation condition of the cooling tower, and are cooperatively acted with the synergistic structure arranged on the cooling tower.
In some embodiments, variable speed control is carried out on the rotating speed of the fan according to the operating condition, and the fan operates at different rotating speeds in different areas, so that coordinated control of fan operation and cold efficiency is realized; for the area with higher cooling efficiency, the fan in the area can be operated at a lower rotating speed; for the area with low cooling efficiency, the fan in the area can be operated at a higher rotating speed.
In some embodiments, the number and power of the fans are changed according to the operation condition, so that the cooperation with the cold effect is realized; for areas with larger cooling efficiency, fewer fans can be arranged or operated, and lower power is adopted. For the area with smaller cooling effect, more fans can be arranged or operated, and larger fan power is adopted.
In some embodiments, the arrangement position of the fan is changed according to the operation condition, so that the cooperative arrangement with the cold effect is realized; for the windward side, fewer fans can be arranged, and the power of the fans is lower. For the leeward side, more fans can be arranged, and larger fan power is adopted.
In some embodiments, a plurality of air deflectors are arranged on the periphery of the air inlet of the cooling tower and extend outwards from the air inlet. The number of the air deflectors is generally 40-80. The structure and the optimized control scheme of the power-assisted fan in the cooling tower have a synergistic effect.
In some embodiments, for a natural draft cooling tower with a rain zone, a plurality of air guide pipes are arranged on the periphery of the rain zone of the cooling tower. Each air guide pipe is arranged along the radial direction of the cooling tower and extends to the inner area of the cooling tower from the air inlet along the radial direction. The structure and the optimized control scheme of the power-assisted fan in the cooling tower have a synergistic effect.
In some embodiments, a cross partition is arranged in the area corresponding to the air inlet of the cooling tower. The structure and the optimized control scheme of the power-assisted fan in the cooling tower have a synergistic effect.
In some embodiments, the packing of the cooling tower adopts an optimized arrangement scheme such as unequal height arrangement or unequal resistance, and the structure and the optimized control scheme of the booster fan in the cooling tower cooperate.
In some embodiments, one or more synergistic structures are used simultaneously, which cooperate with an optimized control scheme for the booster fan inside the cooling tower.
The present invention is described in further detail below with reference to specific examples, which are intended to be illustrative of the invention and not limiting.
Example 1
Referring to fig. 1 and 2, a natural draft cooling tower using a booster fan optimization control technique and an air deflector combination for efficiency improvement, includes: the device comprises a cooling tower body 1, a dehydrator 2, a water distribution system 3, a filler 4, a rain area 5, a fan arrangement plane 6, an air deflector 7 and a fan 8.
The fans 8 are uniformly arranged in the circumferential direction, the number of the fans is 12, and the fans are arranged on the fan arrangement plane 6 above the dehydrator 2. And 50 air deflectors 7 are arranged at the periphery of the air inlet at equal intervals, and the height of the air deflector is equal to that of the air inlet.
Example 2
Referring to fig. 3 and 4, a natural draft cooling tower using a booster fan optimization control technique and an air guide duct for efficiency enhancement comprises: the device comprises a cooling tower body 1, a dehydrator 2, a water distribution system 3, a filler 4, a rain area 5, a fan arrangement plane 6, a fan 8 and an air guide pipe 9.
The fans 8 are arranged in a cross mode, the number of the fans is 13, and the fans are arranged on the fan arrangement plane 6 above the dehydrator 2. 4 air guide pipes 9 are arranged from the air inlet to the center of the cooling tower, and are uniformly arranged at equal intervals.
Example 3
Referring to fig. 5 and 6, a natural draft cooling tower using a booster fan optimized control technique and a cross partition combined for efficiency enhancement, comprising: the device comprises a cooling tower body 1, a dehydrator 2, a water distribution system 3, a filler 4, a rain area 5, a fan arrangement plane 6, a fan 8 and a cross partition wall 10. The fans 8 are arranged in a cross mode, the number of the fans is 12, and the fans are arranged on the fan arrangement plane 6 above the dehydrator 2. The cooling tower rain area is provided with a cross partition wall 10, a fan and the cross partition wall are arranged in a crossed mode, and the included angle between the cross line of the fan and the cross partition wall is 45 degrees. The length of the cross partition wall is equal to the diameter of the bottom of the cooling tower, and the height of the cross partition wall is equal to the height of the air inlet.
According to the embodiment, the comprehensive efficiency-increasing technology based on the arrangement of the booster fan in the natural ventilation cooling tower can effectively improve the ventilation quantity of the natural ventilation cooling tower, enables air in the cooling tower to flow more uniformly, reduces the adverse effect of cross air, greatly increases the cooling efficiency and reduces the power consumption of the booster fan.
It should be noted that the above-mentioned embodiments are only preferred embodiments of the present invention, and the present invention is not limited thereto, and although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and equivalents can be made in the technical solutions described in the foregoing embodiments, or equivalents thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention. Although the present invention has been described with reference to the specific embodiments, it should be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.
Claims (10)
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| CN202011358908.1A CN112484526A (en) | 2020-11-27 | 2020-11-27 | Natural ventilation cooling tower with synergistic effect of internal booster fan and comprehensive synergistic technology |
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| CN202011358908.1A CN112484526A (en) | 2020-11-27 | 2020-11-27 | Natural ventilation cooling tower with synergistic effect of internal booster fan and comprehensive synergistic technology |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112556451A (en) * | 2020-12-03 | 2021-03-26 | 中国能源建设集团广东省电力设计研究院有限公司 | Natural ventilation cooling tower and ventilation method thereof |
| CN113503751A (en) * | 2021-05-28 | 2021-10-15 | 淄博英诺威圣节能科技有限公司 | Capacity increasing structure of natural draft cooling tower |
| CN114877710A (en) * | 2022-05-09 | 2022-08-09 | 国粤（深圳）科技投资有限公司 | Natural draft and mechanical draft double-effect cooling tower in coordination |
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| CN114877710A (en) * | 2022-05-09 | 2022-08-09 | 国粤（深圳）科技投资有限公司 | Natural draft and mechanical draft double-effect cooling tower in coordination |
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Application publication date: 20210312 |