CN112880429A - Indirect air cooling tower underground air inlet system for inhibiting adverse influence of environmental wind - Google Patents
Indirect air cooling tower underground air inlet system for inhibiting adverse influence of environmental wind Download PDFInfo
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- CN112880429A CN112880429A CN201911263199.6A CN201911263199A CN112880429A CN 112880429 A CN112880429 A CN 112880429A CN 201911263199 A CN201911263199 A CN 201911263199A CN 112880429 A CN112880429 A CN 112880429A
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- air
- air inlet
- cooling tower
- underground
- inlet channel
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- 238000001816 cooling Methods 0.000 title claims abstract description 114
- 230000002411 adverse Effects 0.000 title claims abstract description 13
- 230000007613 environmental effect Effects 0.000 title claims description 12
- 230000002401 inhibitory effect Effects 0.000 title description 4
- 230000000694 effects Effects 0.000 claims abstract description 17
- 238000006477 desulfuration reaction Methods 0.000 claims abstract description 5
- 230000023556 desulfurization Effects 0.000 claims abstract description 5
- 238000009413 insulation Methods 0.000 claims description 4
- 238000007710 freezing Methods 0.000 abstract description 5
- 238000005516 engineering process Methods 0.000 abstract description 3
- 238000005457 optimization Methods 0.000 abstract description 2
- 239000003570 air Substances 0.000 description 150
- 230000002829 reductive effect Effects 0.000 description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 238000009825 accumulation Methods 0.000 description 4
- 239000012080 ambient air Substances 0.000 description 4
- 230000003009 desulfurizing effect Effects 0.000 description 4
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 239000003546 flue gas Substances 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 230000008014 freezing Effects 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005338 heat storage Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Images
Classifications
-
- 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
- F28C1/14—Direct-contact trickle coolers, e.g. cooling towers comprising also a non-direct contact heat exchange
-
- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
本发明属于电站空冷技术优化领域，特别涉及一种抑制环境风不利影响的间接空冷塔地下进风系统。该系统包括空冷塔塔筒及其支撑柱、空冷散热器、烟囱、脱硫塔、盖板、圆台形地下进风通道、导流板、排水沟、地表平面；空冷塔塔筒利用支撑柱支撑在圆台形地下进风通道的下底面，烟囱、脱硫塔、空冷散热器均布置在圆台形地下进风通道的下底面；空冷塔塔筒整体位于地表平面以上，空冷散热器整体位于地表平面以下；盖板与地表在同一水平面，且与冷却塔塔筒底部密封连接；圆台形地下进风通道与盖板所形成的环状入口平面就是地下进风系统的进风口。本发明可抑制环境风对空冷散热器冷却性能的不利影响，提升间接空冷系统度夏及防冻性能。
The invention belongs to the field of air-cooling technology optimization of power stations, and particularly relates to an indirect air-cooling tower underground air intake system that suppresses the adverse effects of ambient wind. The system includes an air-cooling tower and its supporting columns, an air-cooling radiator, a chimney, a desulfurization tower, a cover plate, a circular truncated underground air inlet channel, a deflector, a drainage ditch, and a surface plane; the air-cooling tower is supported by a supporting column on the The lower bottom surface of the circular cone-shaped underground air inlet channel, the chimney, the desulfurization tower, and the air-cooling radiator are all arranged on the lower bottom surface of the circular cone-shaped underground air inlet channel; the air-cooling tower is located above the ground level as a whole, and the air-cooled radiator is located below the surface level as a whole; The cover plate is at the same level as the ground surface, and is tightly connected with the bottom of the cooling tower; the annular inlet plane formed by the circular truncated underground air inlet channel and the cover plate is the air inlet of the underground air inlet system. The invention can restrain the adverse influence of ambient wind on the cooling performance of the air-cooling radiator, and improve the summer-proof and anti-freezing performance of the indirect air-cooling system.
Description
Technical Field
The invention belongs to the field of optimization of power station air cooling technology, and particularly relates to an underground air inlet system of an indirect air cooling tower for inhibiting adverse effects of environmental wind.
Background
Under the restriction of water resources, the indirect air cooling system and the air cooling tower are applied in large scale in the water shortage areas in the north of China. The working process is as follows: the cooling air flows through the radiator vertically arranged outside the air cooling tower, absorbs the heat released by hot water in the radiator to cause the temperature of the air cooling tower to rise and the density of the air cooling tower to fall, and is sucked from the periphery of the tower and flows upwards under the action of buoyancy generated by the density difference of the air inside and outside the air cooling tower, and finally is discharged from the outlet of the tower. Since the radiator of the indirect air-cooling system is directly exposed to the atmospheric environment, the ambient wind has a great influence on the operation performance of the indirect air-cooling system, and the problem has attracted great attention by those skilled in the art.
The existing research shows that under the influence of ambient wind, although the cooling air flow of the fan section of the windward side of the air cooling radiator is increased and the heat dissipation capability is enhanced, the air intake of the fan sections of the side wind side and the leeward side is reduced more due to a plurality of negative pressure zones formed inside and outside the air cooling tower, even the fan sections of the side wind side and the leeward side have 'cross wind', and the heat dissipation capability is poorer. Therefore, the air-cooled radiator has extremely uneven cooling air flow rate in different sectors under the action of ambient air, and the overall cooling performance of the air-cooled radiator is reduced, so that the backpressure of the unit is increased, and the generating heat efficiency is reduced. Meanwhile, the desulfurization tower and the chimney are arranged in the tower by the three-tower-in-one indirect air cooling technology, but hot airflow in the cooling tower is deflected under the influence of external environmental wind, so that the corrosion of flue gas to the tower wall is aggravated. In addition, in summer and winter, the ambient air temperature also has great influence on the operating performance of the air-cooled radiator, and is mainly reflected in that: in a high-temperature environment in summer, the temperature of air at the inlet of the air-cooled radiator is increased, so that the cooling performance of the radiator is greatly reduced, and the back pressure of a unit is improved; in winter, the low-temperature environment makes the radiator directly exposed to the air face a large anti-freezing pressure.
Disclosure of Invention
The invention aims to solve the problems and provides an underground air inlet system of an indirect air cooling tower, which can effectively eliminate vortexes existing in an internal and external air flow field of the air cooling tower, inhibit the adverse effect of environmental air on the cooling performance of an air cooling radiator, fully utilize the characteristics of cold accumulation in summer and heat accumulation in winter of an underground space and improve the summer-staying and anti-freezing performance of the indirect air cooling system.
In order to achieve the purpose, the invention adopts the following technical scheme:
an indirect air cooling tower underground air inlet system for inhibiting adverse effects of environmental wind comprises an air cooling tower barrel and a support column thereof, an air cooling radiator, a chimney, a desulfurizing tower, an annular cover plate, a truncated cone-shaped underground air inlet channel, an annular guide plate, a drainage ditch and a ground surface plane, wherein the air cooling tower barrel is supported on the lower bottom surface of the truncated cone-shaped underground air inlet channel by the support column, and the chimney, the desulfurizing tower and the air cooling radiator are all arranged on the lower bottom surface of the truncated cone-shaped underground air inlet channel; the whole tower barrel of the air cooling tower is positioned above a ground surface plane, and the whole air cooling radiator is positioned below the ground surface plane; the circular cover plate is positioned on the same horizontal plane with the earth surface and is hermetically connected with the bottom of the tower cylinder of the cooling tower; the annular inlet plane formed by the round platform-shaped underground air inlet channel and the circular ring-shaped cover plate is an air inlet of an underground air inlet system.
The included angle between the side surface of the round table-shaped underground air inlet channel and the horizontal plane is 30-45 degrees.
The diameter of the lower bottom surface of the circular truncated cone-shaped underground air inlet channel is 2.0-5.6 times of the diameter of the bottom of the air cooling tower cylinder, and the vertical height of the circular truncated cone-shaped underground air inlet channel is equal to that of the air cooling radiator.
2-3 layers of circular ring-shaped guide plates are arranged in the circular-truncated-cone-shaped underground air inlet channel, and the cross section of each circular ring-shaped guide plate is streamline.
The air cooling radiator is arranged at the outer edge of the bottom of the air cooling tower in a surrounding mode and is located at the position 1.1-1.3 times of the diameter of the bottom of the air cooling tower.
The surface of the circular cover plate is coated with a heat insulation layer and can stretch along the radius direction.
The radial width of the annular air inlet is 1.0-2.0 times of the vertical height of the air cooling radiator.
The annular drainage ditch is arranged on the lower bottom surface of the round table-shaped underground air inlet channel, the width of the annular drainage ditch in the radial direction is 0.6-0.8 m, and the vertical depth is 1-2 m.
Compared with the prior art, the invention has the beneficial effects that:
(1) the air cooling radiator is integrally arranged in the circular-truncated-cone-shaped underground air inlet channel, so that a good airflow screen effect can be formed on the environmental wind in the incoming flow direction, the interference and the damage of the environmental wind on the internal and external air flow fields of the air cooling tower can be effectively prevented, the formation of vortexes and cross wind is eliminated or inhibited, and the heat exchange quantity of the side wind surface and the back wind surface of the air cooling radiator is greatly increased; meanwhile, the air flow deflection degree in the air cooling tower is obviously reduced, and the corrosion of the flue gas to the tower barrel of the air cooling tower is effectively slowed down.
(2) The characteristics of cold storage in summer and heat storage in winter of the underground space are fully utilized, the formed round table-shaped underground air inlet channel has the characteristics of being warm in winter and cool in summer, inlet air is cooled when flowing through the underground air inlet channel in summer, the temperature of air entering the radiator is reduced to a certain extent, and the cooling effect of the radiator is favorably improved; in winter, the round platform-shaped underground air inlet channel has a heat preservation effect on the radiator, the air cooling radiator is prevented from being directly exposed in the atmospheric environment, and the risk of freezing of the air cooling radiator is effectively reduced.
(3) The air cooling radiator is arranged in the underground air inlet channel, so that the dust deposition on the surface of the radiator can be effectively reduced, the cooling performance of the radiator is improved, and the cleaning cost of the radiator is greatly reduced.
(4) Because the air cooling tower, the underground air inlet channel and the air cooling radiator are arranged in an axisymmetric manner, the indirect air cooling tower underground air inlet system has an effect on environmental wind with different wind directions.
Drawings
Fig. 1 is a front view of an indirect air cooling tower underground air inlet system according to an embodiment of the present invention.
Fig. 2 is a top view of an indirect air cooling tower underground air inlet system according to an embodiment of the present invention.
Fig. 3 is a schematic view of the annular cover plate.
Fig. 4 is a schematic view of a telescoping beam.
Fig. 5 is a schematic view of the support of the deflector.
The list of labels in the figure is: 1. an air cooling tower barrel, 2, an air cooling radiator, 3, a chimney, 4, a desulfurizing tower, 5, a truncated cone-shaped underground air inlet channel, 6, a circular ring-shaped cover plate, 6-1, a fixed part of the cover plate, 6-2, a telescopic part of the cover plate, 6-3, a telescopic beam, 6-4, a fixed rod of the telescopic beam, 6-5, a telescopic rod of the telescopic beam, 7, an air inlet, 8, a support column, 9, a lower bottom surface of the truncated cone-shaped underground air inlet channel, 10, a side surface of the truncated cone-shaped underground air inlet channel, 11, an annular drainage ditch, 12, a ground surface plane, 13, a guide plate, 13-1, an upper guide plate, 13-2, a lower guide plate, 13-3, a longitudinal support column of the upper guide plate, 13-4, an oblique support column of the upper guide plate, 13-5, a longitudinal support column of the lower, The oblique support column of lower floor's guide plate.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 and 2, the truncated cone-shaped underground air inlet channel 5 is positioned below the ground surface plane 12, and the diameter D of the lower bottom surface 9 of the truncated cone-shaped underground air inlet channel1Is the diameter D of the bottom of a tower barrel 1 of an indirect air cooling tower02.0-5.6 times, the vertical height H of the round platform-shaped underground air inlet channel and the vertical height H of the air cooling radiator 2rEqual, the included angle alpha between the side surface 10 of the circular truncated cone-shaped underground air inlet channel and the horizontal plane is 30-45 degrees. The air cooling tower barrel 1 is supported on the lower bottom surface 9 of the circular truncated cone-shaped underground air inlet channel by utilizing a support column 8, the bottom of the air cooling tower barrel 1 and the ground surface 12 are in the same horizontal plane, and the whole air cooling tower barrel 1 is positioned above the ground surface plane 12; the chimney 3 and the desulfurizing tower 4 are arranged on the lower bottom surface 9 of the round table-shaped underground air inlet channel. The air cooling radiator 2 is vertically supported on the lower bottom surface 9 of the round platform-shaped underground air inlet channel, the air cooling radiator 2 is integrally arranged below a ground surface plane 12, the air cooling radiator 2 is arranged on the outer edge of the bottom of the air cooling tower in a surrounding way along the central axis of the air cooling tower, and the arrangement diameter D of the air cooling radiator 2 is3Is the diameter D of the bottom of a tower barrel 1 of an indirect air cooling tower01.1 to 1.3 times of the total weight of the composition.
The round platform-shaped underground air inlet channel 5 is provided with a circular cover plate 6, the circular cover plate 6 and the earth surface 12 are on the same horizontal plane, the circular cover plate 6 is hermetically connected with the bottom of the indirect cooling tower drum 1, and the surface of the circular cover plate 6 is coated with a heat insulation layer. Thus, the annular inlet plane formed by the round platform shaped underground air inlet channel 5 and the circular ring shaped cover plate 6 is the air inlet 7 of the underground air inlet system, and the annular air inlet 7 faces toArranged in the upper open air and can be provided with a protective grating. Radial width D of the annular air inlet 72Equal to the vertical height H of the air cooling radiatorr1.0-2.0 times, the radial width D of the air inlet 72Can be adjusted by stretching the circular ring-shaped cover plate 6 in the radius direction. As shown in fig. 3 and 4, the cover plate 6 is composed of a fixed part 6-1 and a telescopic part 6-2, the fixed part 6-1 of the cover plate 6 is made of a stainless steel plate or a PVC plate, and the telescopic part 6-2 of the cover plate 6 is made of flexible tarpaulin; the cover plate 6 is supported and fixed on 8 or 16 telescopic beams 6-3 which are uniformly distributed along the circumferential direction, the telescopic beams 6-3 are composed of fixed rods 6-4 and telescopic rods 6-5, one end of each fixed rod 6-4 is fixedly connected with the bottom of the cooling tower barrel 1, the fixed rods 6-4 support and fix the fixed parts 6-1 of the cover plate 6, and the telescopic rods 6-5 support and fix the telescopic parts 6-2 of the cover plate 6; the fixed rod 6-4 is of a hollow structure, the telescopic rod 6-5 can freely slide in the fixed rod 6-4, and the flexible tarpaulin can radially move along with the telescopic rod 6-5 under the driving of power, so that the radial width adjustment of the air inlet 7 is realized.
2-3 layers of circular ring-shaped guide plates 13 are arranged in the circular-truncated-cone-shaped underground air inlet channel 5, and the cross sections of the guide plates 13 are streamline. As shown in fig. 5, the upper-layer air deflector is supported on the lower-layer air deflector by a plurality of circumferentially and uniformly distributed longitudinal support columns and oblique support columns; the lower guide plate is respectively supported on the lower bottom surface 9 and the side surface 10 of the round table-shaped underground air inlet channel by a plurality of longitudinal support columns and oblique support columns which are uniformly distributed in the circumferential direction. All the longitudinal support columns are vertical to the lower bottom surface 9 of the round table-shaped underground air inlet channel, and all the oblique support columns are vertical to the side surface 10 of the round table-shaped underground air inlet channel.
The lower bottom surface 9 of the round platform shaped underground air inlet channel is provided with an annular drainage ditch 11 to collect rainwater flowing down from the ground surface plane and the rainwater is pumped out by a water pump to prevent water from accumulating in the round platform shaped underground air inlet channel. The width and depth of the gutter 11 are determined according to the annual rainfall and the maximum rainfall, and generally the width of the gutter 11 in the radial direction is 0.6m to 0.8m and the vertical depth is 1m to 2 m.
The working principle of the invention is as follows:
the air cooling radiator is integrally arranged in the circular table-shaped air inlet channel lower than the ground surface plane, a good airflow screen effect can be formed on the ambient air in the incoming flow direction, meanwhile, the air flowing through the air cooling radiator is more uniform due to the guide plate in the air inlet channel, the interference and the damage of the ambient air on the internal and external air flow fields of the air cooling tower can be effectively prevented, the formation of vortexes and cross-ventilation is eliminated or inhibited, and the heat exchange quantity of the side air surface and the back air surface fan section of the air cooling radiator is greatly increased. Meanwhile, the air flow deflection degree in the air cooling tower is obviously reduced, and the corrosion of the flue gas to the tower barrel of the air cooling tower is effectively slowed down.
The air cooling radiator is integrally arranged in the underground air inlet channel, and the upper part of the underground air inlet channel is covered with the heat insulation cover plate, so that the characteristics of cold accumulation in summer and heat accumulation in winter of the underground space are fully utilized, and the underground air inlet channel has the characteristics of being warm in winter and cool in summer. In high-temperature seasons in summer, the inlet air is cooled when flowing through the underground air inlet channel, so that the temperature of the air entering the radiator is reduced to a certain extent, meanwhile, the direct sunning of the sun to the air cooling radiator is avoided, and the cooling effect of the air cooling radiator is improved; in winter, the air cooling radiator is prevented from being directly exposed in a low-temperature environment, and the freezing risk of the air cooling radiator can be effectively reduced by utilizing the characteristic that the underground air inlet channel is warm in winter. In addition, the shielding effect of the underground air inlet channel on the air cooling radiator also reduces the dust deposition on the surface of the radiator, improves the cooling performance of the radiator and greatly reduces the cleaning cost of the radiator.
Claims (8)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911263199.6A CN112880429A (en) | 2019-11-29 | 2019-11-29 | Indirect air cooling tower underground air inlet system for inhibiting adverse influence of environmental wind |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911263199.6A CN112880429A (en) | 2019-11-29 | 2019-11-29 | Indirect air cooling tower underground air inlet system for inhibiting adverse influence of environmental wind |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112880429A true CN112880429A (en) | 2021-06-01 |
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ID=76039495
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911263199.6A Pending CN112880429A (en) | 2019-11-29 | 2019-11-29 | Indirect air cooling tower underground air inlet system for inhibiting adverse influence of environmental wind |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112880429A (en) |
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2019
- 2019-11-29 CN CN201911263199.6A patent/CN112880429A/en active Pending
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Application publication date: 20210601 |