CN113776351A - Blowing type ventilation cooling tower and cooling tower arrangement system - Google Patents
Blowing type ventilation cooling tower and cooling tower arrangement system Download PDFInfo
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- CN113776351A CN113776351A CN202110969500.6A CN202110969500A CN113776351A CN 113776351 A CN113776351 A CN 113776351A CN 202110969500 A CN202110969500 A CN 202110969500A CN 113776351 A CN113776351 A CN 113776351A
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- 238000001816 cooling Methods 0.000 title claims abstract description 89
- 238000009423 ventilation Methods 0.000 title claims abstract description 24
- 238000007664 blowing Methods 0.000 title description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 128
- 239000000498 cooling water Substances 0.000 claims abstract description 36
- 239000007921 spray Substances 0.000 claims abstract description 15
- 238000009826 distribution Methods 0.000 claims description 24
- 238000005507 spraying Methods 0.000 claims description 21
- 239000000945 filler Substances 0.000 claims description 17
- 238000003860 storage Methods 0.000 claims description 9
- 230000007704 transition Effects 0.000 claims description 9
- 230000005484 gravity Effects 0.000 claims description 4
- 230000002093 peripheral effect Effects 0.000 claims description 4
- 230000006835 compression Effects 0.000 claims description 2
- 238000007906 compression Methods 0.000 claims description 2
- 230000006872 improvement Effects 0.000 abstract description 2
- 238000003825 pressing Methods 0.000 description 4
- 238000004880 explosion Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000012856 packing Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 2
- 238000005399 mechanical ventilation Methods 0.000 description 2
- 239000011150 reinforced concrete Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011152 fibreglass Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000002285 radioactive effect Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
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Classifications
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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
- F28F19/00—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers
- F28F19/01—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers by using means for separating solid materials from heat-exchange fluids, e.g. filters
-
- 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
- F28F25/02—Component parts of trickle coolers for distributing, circulating, and accumulating liquid
-
- 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
- F28F25/02—Component parts of trickle coolers for distributing, circulating, and accumulating liquid
- F28F25/04—Distributing or accumulator troughs
-
- 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
- F28F25/02—Component parts of trickle coolers for distributing, circulating, and accumulating liquid
- F28F25/06—Spray nozzles or spray pipes
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- 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
- F28F25/02—Component parts of trickle coolers for distributing, circulating, and accumulating liquid
- F28F25/08—Splashing boards or grids, e.g. for converting liquid sprays into liquid films; Elements or beds for increasing the area of the contact surface
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- 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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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21D—NUCLEAR POWER PLANT
- G21D1/00—Details of nuclear power plant
- G21D1/02—Arrangements of auxiliary equipment
-
- 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
- F28C2001/006—Systems comprising cooling towers, e.g. for recooling a cooling medium
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- Plasma & Fusion (AREA)
- High Energy & Nuclear Physics (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention discloses a blast-type ventilation cooling tower and a cooling tower arrangement system, wherein the blast-type ventilation cooling tower comprises a fan chamber, an air inlet channel, an air blower, a rain chamber, a heat exchange chamber, an air exhaust channel, a water spray device and a water collecting pool, wherein the air inlet channel is arranged at the upper end of one side wall of the fan chamber and has a downward opening; the exhaust channel is far away from the exhaust outlet of the heat exchange chamber and is staggered with the heat exchange chamber. The blast-type ventilation cooling tower is suitable for important service water systems of nuclear power plants, and realizes heat exchange and cooling of cooling water; through the improvement of air inlet channel and exhaust channel, effectively prevent that the thing that flies into and cause the damage to the interior component of tower in the tower.
Description
Technical Field
The invention relates to the technical field of nuclear power equipment, in particular to a blowing type ventilation cooling tower and a cooling tower arrangement system.
Background
For a nuclear power plant close to sea or inland, the nuclear power plant is limited by plant site conditions, the atmosphere is generally used as a 'final heat trap', the blast-type ventilation cooling tower is used as an important carrier for conducting the residual heat of the nuclear power plant to the atmosphere of the 'final heat trap', and the safety functions borne by the blast-type ventilation cooling tower comprise the discharge of the residual heat of a main loop and the residual heat of a fuel water pool cooling and purifying system, and the radioactive containment is indirectly ensured.
The blast-type ventilation cooling tower configured for the important service water system of the nuclear power plant has no application performance, and the tower body arrangement scheme of the blast-type mechanical ventilation cooling tower in the prior art generally adopts the conventional industrial design standard, can not be directly applied to the important service water system of the nuclear power plant, and mainly has the following technical problems:
the tower body arrangement of the blowing type mechanical ventilation cooling tower in the prior art lacks a protection function against external disasters (including design benchmark airplane impact, external explosion, earthquake, external water flooding, extreme air temperature, extreme wind and the like), and the tower body arrangement scheme cannot meet the nuclear-level functional requirements of important plant water system configuration equipment.
Disclosure of Invention
The invention aims to provide an improved blowing-type ventilation cooling tower and a cooling tower arrangement system.
The technical scheme adopted by the invention for solving the technical problems is as follows: the blast type ventilation cooling tower comprises a fan chamber, an air inlet channel, a blower, a rain chamber, a heat exchange chamber, an air exhaust channel, a water spray device and a water collecting pool, wherein the air inlet channel is arranged at the upper end of one side wall of the fan chamber and has a downward opening;
the air outlet of the air exhaust channel, which is far away from the heat exchange chamber, is staggered with the heat exchange chamber; under the driving of the blower, air enters the heat exchange chamber after passing through the air inlet channel, the fan chamber and the rain chamber in sequence, and is discharged through the air exhaust channel after exchanging heat with cooling water sprayed out by the water spray device in the heat exchange chamber; and the cooling water after heat exchange enters the water collecting tank through the rain area chamber.
Preferably, an air inlet is formed in the upper end of one side wall of the fan chamber and communicated with the air inlet channel and the fan chamber.
Preferably, the plane of the opening of the air inlet channel is lower than the plane of the lower edge of the air inlet.
Preferably, the air inlet is provided with a filter screen.
Preferably, an air outlet is formed in the other side wall of the fan room and is communicated with the fan room and the rain room;
the air outlet end of the air blower faces and is matched with the air outlet.
Preferably, the air outlet is of a bell mouth shape, and one end with a larger caliber faces and is communicated with the rain compartment.
Preferably, a water guide brim is arranged on one inner wall surface of the rain compartment, and the water guide brim is positioned above the air outlet to prevent cooling water from flowing into the air outlet by wall.
Preferably, a positioning platform which is protruded and extends to the other side wall of the fan room is arranged on the indoor ground of the fan room, and the air outlet is positioned above the positioning platform;
the bottom of the blower is connected to the positioning platform through foundation bolts; the periphery of the air outlet end of the air blower is connected with the inner peripheral surface of the air outlet through bolts.
Preferably, the indoor ground level of the fan room is higher than the outdoor ground level.
Preferably, a water spraying filler and a pressing and fixing beam are arranged in the heat exchange chamber; the trickle filler is filled at the lower end of the heat exchange chamber, and the compression beam is arranged on the trickle filler.
Preferably, the ends of the fixing beams are connected to the inner wall of the heat exchange chamber.
Preferably, the inner bottom surface of the heat exchange chamber is provided with a bracket, and the water spraying filler is placed on the bracket.
Preferably, the water spraying device comprises a water distribution pipeline and a plurality of spray heads distributed on the water distribution pipeline at intervals.
Preferably, the setting height of the water collecting tank is lower than that of the rain compartment, and the water collecting tank and the rain compartment are communicated through a water guide hole; and cooling water in the rain area chamber enters the water collecting pool through the water guide hole under the gravity.
Preferably, the inner bottom surface of the rain compartment is a slope, and the slope is connected with the water guide hole at the downward side.
Preferably, the exhaust channel comprises a first cylinder section connected with the heat exchange chamber, a second cylinder section staggered with the first cylinder section, and a transition section connected between the first cylinder section and the second cylinder section in an inclined extending manner; the free end opening of the second cylinder section forms the air outlet.
Preferably, a shutter is arranged at the air outlet; the louver blades of the louver are obliquely arranged, so that the through holes in the louver are obliquely towards the inner wall surface of the second cylinder section far away from the transition section.
Preferably, a dehydrator is arranged in the first cylinder section.
Preferably, the forced draft cooling tower further comprises a water storage tank disposed below the rain compartment and/or water collection tank;
the water storage tank is connected with the water collecting tank through a pump and a pipeline, and water is supplied to the water collecting tank.
The invention also provides a cooling tower arrangement system, which comprises at least two blast-type ventilation cooling towers in any one of the above manners; every two blast-type ventilation cooling towers are arranged in a mirror image mode with air inlet channels arranged in an opposite mode.
Preferably, a distribution room is arranged between the two blast-type ventilation cooling towers, and a water distribution pipeline connected with the water spraying device of each blast-type ventilation cooling tower is arranged in the distribution room.
The blast-type ventilation cooling tower is suitable for important service water systems of nuclear power plants, and realizes heat exchange and cooling of cooling water; through the improvement of air inlet channel and exhaust channel, effectively prevent that the thing that flies into and cause the damage to the interior component of tower in the tower.
A cooling tower arrangement system is formed by arranging a plurality of blast type ventilation cooling towers and is suitable for meteorological conditions of different factories; aiming at cold plants, the anti-icing risk can be responded by stopping part of blowers of the blast-type ventilation cooling tower in winter operation conditions; the functional requirements of the nuclear power plant under the operating condition and the accident condition environmental conditions are met.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a schematic view of the cooling tower layout system according to an embodiment of the present invention (with the top removed);
FIG. 2 is a schematic cross-sectional view of the cooling tower arrangement of FIG. 1 taken along line A-A;
fig. 3 is a schematic view of the structure of the blind of fig. 2.
Detailed Description
For a more clear understanding of the technical features, objects and effects of the present invention, embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
Referring to fig. 1, the cooling tower arrangement system of the present invention includes at least two forced draft cooling towers 100, and each two forced draft cooling towers 100 are arranged in a mirror image.
In the embodiment shown in fig. 1, the cooling tower arrangement comprises twelve forced draft cooling towers 100, the twelve forced draft cooling towers 100 being divided into two mirrored rows, each row comprising six forced draft cooling towers 100.
In practical application of a nuclear power plant, the blast-type ventilation cooling tower 100 can be increased or decreased according to needs, and is flexible in arrangement.
As shown in fig. 2, which shows a longitudinal cross-section of two mirror-image arranged forced draft cooling towers 100 of fig. 1. Each of the forced draft cooling towers 100 may include an air intake passage 10, a fan room 20, a rain compartment 30, a heat exchange chamber 40, and an air exhaust passage 50, which are sequentially connected to each other, an air blower 60 disposed in the fan room 20, a water collecting tank 70 communicated with the rain compartment 30, and a water spray device 80 disposed at the top of the heat exchange chamber 40. Under the driving of the blower 60, outside air enters the fan chamber 20 from the air inlet channel 10, then enters the rain compartment 30 and the heat exchange chamber 40, exchanges heat with cooling water in the heat exchange chamber 40, and then is discharged outside from the air exhaust channel 50; the cooling water introduced into the heat exchange chamber 40 is subjected to heat exchange with air, is heated, enters the rain compartment 30 and then enters the water collecting tank 70; the air flow direction is shown by the broken line arrows in fig. 2, and the cooling water flow direction is shown by the solid line arrows in fig. 2.
Because the air enters the heat exchange chamber 40 from the rain zone chamber 30, and the cooling water enters the water collecting tank 70 through the rain zone chamber 30, in the rain zone chamber 30, the air entering the rain zone chamber 30 firstly exchanges heat with the cooling water entering the rain zone chamber 30 and then enters the heat exchange chamber 40, so that the cooling water entering the rain zone chamber 30 is subjected to secondary heat exchange, and the cooling water can be cooled again and then enters the water collecting tank 70.
The fan room 20 is disposed on the ground (0m), and the indoor ground level of the fan room 20 is set higher than the outdoor ground level, for example, higher than 1.0 m.
The air inlet channel 10 is arranged at the upper end of one side wall of the fan chamber 20, the upper end of the side wall is provided with an air inlet 21, and the air inlet 21 is communicated with the air inlet channel 10 and the fan chamber 20. In the two mirror image arranged blower cooling towers 100, the air inlet channel 10 is located on the side of the blower cooling tower 100 facing away from the other blower cooling tower 100.
The opening of the air inlet duct 10 away from the fan chamber 20 is directed downward to prevent external flying objects from flying into the air inlet duct 10. Preferably, the plane of the opening of the air intake channel 10 is lower than the plane of the lower edge of the air intake opening 21, so that the flying angle α from the opening to the air intake opening 21 is an upward angle (not beneficial to flying), and flying objects are effectively prevented from entering the air intake opening 21.
In addition, in order to prevent the flying objects or particles with certain sizes from entering the fan chamber 30, a filter screen 22 is further arranged at the air inlet 21. Alternatively, the filter screen 22 may be a woven wire mesh having a mesh size of 25mm × 25mm, which can prevent the intrusion of small flying objects or particles having a diameter of 2.54cm or more.
The blower 60 is arranged in the fan chamber 20 and faces the air inlet 21 with the air inlet end thereof; the blower 60 is a nuclear grade blower, corresponding to the application of the forced draft cooling tower 100 in a nuclear power plant. An air outlet 23 is arranged on the other side wall of the fan room 20, and the air outlet 23 is communicated with the fan room 20 and the rain room compartment 30. The air blower 60 faces and is matched in the air outlet 23 with the air outlet end thereof; when the blower 60 works, air is sucked from the air inlet end and then is output from the air outlet end, and enters the rain compartment 30 through the air outlet 23.
The outlet 23 is preferably of a bell mouth shape, one end with a larger diameter faces the rain compartment 30 as a downstream end and is communicated with the rain compartment, one end with a smaller diameter faces the inside of the fan chamber 20 as an upstream end, and the air outlet end of the blower 60 is matched with the end with a smaller diameter of the outlet 23.
In order to fix the blower 60 in the fan chamber 20, a positioning platform 24 protruding and extending to the other side wall (the side wall where the air outlet 23 is located) of the fan chamber 20 is disposed on the indoor ground of the fan chamber 20, and the air outlet 23 is located above the positioning platform 24. The bottom of the blower 60 is connected to the positioning platform 24 through foundation bolts; the air-out end periphery of air-blower 60 passes through the bolt and is connected with the inner peripheral surface of air outlet 23, improves the installation stability who realizes air-blower 60, can deal with under the safe earthquake work condition of shutting down, guarantees that the fan does not lose the operation function.
The rain compartment 30 is arranged next to the fan chamber 20, sharing a side wall, on which the air outlet 23 is located. The heat exchange chamber 40 is disposed above the rain chamber 30, and is partitioned and communicated with the rain chamber 30 by a cross member. The cross beams serve as top beams for the rain compartment 30 and also as support beams for the heat exchange material in the heat exchange chamber 40; the cooling water after heat exchange with the air enters the rain compartment 30 through the spaces between the cross members.
In order to avoid the problem of flooding inside the blower 60 caused by the cooling water flowing into the air outlet 23 along the side wall where the air outlet 23 is located, a water guiding brim 31 is arranged on one inner wall surface of the rain area chamber 30, and the water guiding brim 31 is located above the air outlet 23 to prevent the cooling water from flowing into the air outlet 23 by wall adhesion. The water guide eaves 31 can be blocks or rods in any shape; the water guide eaves 31 may also be a baffle plate, and is disposed above the air outlet 23 in a downward-inclined manner, so as to guide the cooling water falling thereon to a direction away from the air outlet 23.
The heat exchange chamber 40 is provided with a water spraying filler 41 and a pressing beam 42.
The water spraying filler 41 is filled at the lower end of the heat exchange chamber 40 as a heat exchange material, and the air enters the heat exchange chamber 40 and exchanges heat with the cooling water passing through the water spraying filler 41 in the water spraying filler 41. The trickle filler 41 is processed and manufactured according to the specific environmental conditions required by the important plant water system of the nuclear power plant, can be exposed in the air or soaked in the seawater all the year round without influencing the operation function, and can bear the water and gas environments with high water temperature (80 ℃) and low air temperature (-45 ℃).
In one embodiment, the water-spraying filler 41 is made of PVC. In another embodiment, the water-spraying packing 41 is made of metal. Compared with a metal material, the water spraying filler 41 made of the PVC material is lighter and low in cost.
Considering the external explosion disaster protection factor, the external explosion shock wave may cause the water spraying filler 41 to receive upward thrust (about 350kg upward thrust per square meter), and the upward thrust is not sufficiently offset by the gravity of the water spraying filler 41, and the water spraying filler 41 is reinforced by the pressure-fixing beam 42.
The ends of the pressing beams 42 may be attached to the inner wall of the heat exchange chamber 40 to define a fixed space between the pressing beams 42 and the inner bottom surface of the heat exchange chamber 40, and the water packing 41 is filled and confined in the space.
Further, the inner bottom surface of the heat exchange chamber 40 is provided with a bracket 43, and the water spray packing 41 rests on the bracket 43. The bracket 43 may be made of glass fiber reinforced plastic.
The water spray device 80 is provided at the inner top of the heat exchange chamber 40 and is connected to a piping of an important service water system of the nuclear power plant to introduce cooling water into the heat exchange chamber 40. The water spray device 80 may generally include a water distribution pipe, a plurality of spray heads spaced apart on the water distribution pipe; the cooling water is sprayed out in a spraying mode and is fully contacted with air to carry out heat exchange.
The exhaust duct 50 is connected above the heat exchange chamber 40 and communicates with the heat exchange chamber 40, and is partitioned by a cross member. The air outlet 51 of the air exhaust channel 50 far away from the heat exchange chamber 40 is staggered with the heat exchange chamber 40, so that external flying objects or particles and the like cannot directly fall into the heat exchange chamber 40 from the air outlet 51, and the small flying objects are prevented from damaging a water spraying device 80, a water spraying filler 41 and the like in the heat exchange chamber 40.
In the embodiment shown in fig. 2, the exhaust duct 50 includes a first cylindrical section 51 connected to the heat exchange chamber 40, a second cylindrical section 52 offset from the first cylindrical section 51, and a transition section 53 connected between the first cylindrical section 51 and the second cylindrical section 52 in an inclined manner; the free end of the second cylindrical section 52 is open to form an exhaust outlet.
The first tube section 51 and the second tube section 52 are staggered, so that the height directions of the first tube section 51 and the second tube section 52 are not on the same straight line, and the length direction of the transition section 53 is inclined relative to the height directions of the first tube section 51 and the second tube section 52.
Further, a louver 54 is provided at the air outlet of the air exhaust duct 50 to further block the flying objects. Referring to fig. 2 and 3, louver 54 includes a plurality of louvers 541 arranged in parallel at intervals, and the interval between adjacent louvers 541 forms passage holes 542 of louver 54. The louver 541 is preferably disposed so as to be inclined such that the passage hole 542 in the louver 54 is inclined toward the second barrel section 52 away from the inner wall surface of the transition section 53. When a flying object enters the discharge duct 50 through the louver 54, the flying object falls along the extending direction of the passage hole 542 toward the inner wall surface of the second barrel section 52 away from the transition section 53, and does not directly enter the first barrel section 51.
In order to remove the floating drops carried in the air and reduce the moisture content of the air, a dehydrator 55 is arranged in the first cylinder section 51 of the exhaust channel 50, and the dehydrator 55 can be laid on a beam at the top of the heat exchange chamber 40 (also at the bottom of the exhaust channel 50). The air entering the exhaust passage 50 is subjected to water removal by the water remover 55 and then discharged to the outside atmosphere along the transition section 53 and the second cylinder section 52.
The catch basin 70 may be in close proximity connection with the rain chamber 30, sharing a side wall therebetween; the side wall is provided with a water guide hole 32, and cooling water entering the rain compartment 30 enters the water collecting tank 70 through the water guide hole 32. The height of the water collecting tank 70 is lower than that of the rain compartment 30, and the cooling water in the rain compartment 30 enters the water collecting tank 70 through the water guide hole 32 under the gravity without any power equipment.
When the indoor ground elevation of the rain region chamber 30 is equal to the outdoor ground elevation, the indoor ground elevation of the sump 70 is set lower than the outdoor ground elevation, for example, to a height of-2.0 m.
Preferably, as shown in fig. 2, the inner bottom surface of the rain area chamber 30 is a slope 33, and the slope 33 is connected to the water guide hole 32 at a downward side, so that the cooling water in the rain area chamber 30 can be guided to the water collection tank 70 without accumulating in the rain area chamber 30.
In addition, the water collecting tank 70 supplies the cooling water after heat exchange to a heat exchanger of an important plant water system of the nuclear power plant through a pump, a pipeline and other equipment, so that the cooling water can be recycled.
Further, in the present invention, the forced draft cooling tower 100 may further include a water reservoir 90 disposed under the rain chamber 30 and/or the water collection tank 70.
The water storage 90 is located below the ground (0m), and the depth of the water storage 90 can be set according to needs, for example, the inner bottom surface elevation of the water storage 90 can be-9.0 m. The maximum liquid level in the reservoir 90 is maintained at a suitable height, such as-3.5 m, etc.
The water storage tank 90 can be one or more than one, and is positioned at the lower part of the whole blast type ventilation cooling tower 100, and the stored water quantity can correspond to the supplementary water quantity of 30 days of the accident operation condition of the nuclear power plant, so that the floor area of the blast type ventilation cooling tower 100 is greatly reduced.
The water storage tank 90 can be connected with the water collection tank 70 through a pump and a pipeline, so that the water collection tank 70 is supplied with the supplementing water, the problem of insufficient cooling water is solved, and the salt concentration of the cooling water is reduced.
In addition, in the cooling tower arrangement system of the present invention, a distribution room 200 is provided between two or two rows of the blowing-type ventilating cooling towers 100 arranged in a mirror image, a water distribution pipeline 210 is provided in the distribution room 200, the water distribution pipeline 210 is connected to the essential service water system of the nuclear power plant and is respectively connected to the water spray device 80 of each blowing-type ventilating cooling tower 100, so that the cooling water of the essential service water system of the nuclear power plant flows into the distribution room 200 first and is redistributed to the water spray device 80 of each blowing-type ventilating cooling tower 100.
The air intake duct 10, the fan room 20, the rain compartment 30, the heat exchange room 40, the air exhaust duct 50, and the water collecting tank 70 of each of the forced draft cooling towers 100 are formed by enclosing a reinforced concrete structure, so that the floor, the side wall, and the ceiling of each room such as the fan room 20, and the entire peripheral side walls of the air intake duct 10 and the air exhaust duct 50 are made of reinforced concrete.
Between two mirror-image arranged forced draft cooling towers 100, the two forced draft cooling towers 100 are adjacent to each other with their respective exhaust ducts 50, and the second drum segments 52 of the two exhaust ducts 50 share a side wall. The distribution room 200 is located below the two exhaust ducts 50, so that the floors of the second drum segments 52 of the two exhaust ducts 50 can form the ceiling of the distribution room 200.
In the cooling tower arrangement system shown in fig. 1, the distribution room 200 is disposed between two rows of the forced draft cooling towers 100, the water distribution pipeline 210 can be connected to the important service water system of the nuclear power plant through a main water pipe to receive cooling water, and the received cooling water is distributed to the forced draft cooling towers 100 to be started through the water distribution pipeline 210. The water inlet end of the water spraying device 80 of each blast-type ventilation cooling tower 100 can be provided with a control valve, and the control valve controls the on-off of the water spraying device 80 and the water distribution pipeline 210.
When the cooling tower arrangement system works, according to the amount of cooling water and the heat exchange requirement thereof, the control valves of the corresponding number of the blowing-type ventilating cooling towers 100 are opened, the corresponding water spraying devices 80 and the corresponding water distribution pipelines 210 are communicated, and the corresponding number of the blowing-type ventilating cooling towers 100 are started to cool the cooling water in a heat exchange manner with air.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (21)
1. A blowing-type ventilation cooling tower is characterized by comprising a fan chamber, an air inlet channel, an air blower, a rain chamber, a heat exchange chamber, an air exhaust channel, a water spraying device and a water collecting pool, wherein the air inlet channel is arranged at the upper end of one side wall of the fan chamber and has a downward opening;
the air outlet of the air exhaust channel, which is far away from the heat exchange chamber, is staggered with the heat exchange chamber; under the driving of the blower, air enters the heat exchange chamber after passing through the air inlet channel, the fan chamber and the rain chamber in sequence, and is discharged through the air exhaust channel after exchanging heat with cooling water sprayed out by the water spray device in the heat exchange chamber; and the cooling water after heat exchange enters the water collecting tank through the rain area chamber.
2. A forced draft cooling tower according to claim 1 wherein said fan compartment has an air inlet at an upper end of said one side wall, said air inlet communicating between said air inlet duct and said fan compartment.
3. A forced draft cooling tower according to claim 2, wherein the opening of said air intake duct is located on a plane lower than the plane of the lower edge of said air intake opening.
4. A forced draft cooling tower according to claim 2, wherein said air inlet is provided with a filter screen.
5. A forced draft cooling tower according to claim 1, wherein an air outlet is provided on the other side wall of said fan compartment, said air outlet communicating said fan compartment with a rain compartment;
the air outlet end of the air blower faces and is matched with the air outlet.
6. A forced draft cooling tower according to claim 5 wherein said outlet is flared with the larger end facing and communicating with said rain compartment.
7. The forced draft cooling tower of claim 5, wherein a water guiding brim is disposed on an inner wall surface of the rain compartment, and the water guiding brim is located above the air outlet to prevent cooling water from flowing into the air outlet.
8. A forced draft cooling tower according to claim 5 wherein the floor of the blower compartment is provided with a locating platform raised to and extending from said other side wall of the blower compartment, said outlet being located above said locating platform;
the bottom of the blower is connected to the positioning platform through foundation bolts; the periphery of the air outlet end of the air blower is connected with the inner peripheral surface of the air outlet through bolts.
9. A forced draft cooling tower of claim 1 wherein said fan compartment has an indoor floor level higher than an outdoor floor level.
10. A forced draft cooling tower according to claim 1 wherein said heat exchange chamber is filled with water and consolidated beams; the trickle filler is filled at the lower end of the heat exchange chamber, and the compression beam is arranged on the trickle filler.
11. A forced draft cooling tower according to claim 10 wherein the ends of said hold down beams are attached to the inner walls of said heat exchange chamber.
12. A forced draft cooling tower according to claim 10 wherein the inner bottom surface of said heat exchange chamber is provided with brackets on which said trickle charge rests.
13. A forced draft cooling tower according to claim 1 wherein said water spray means comprises a water distribution duct, a plurality of spray heads spaced apart on said water distribution duct.
14. A forced draft cooling tower according to claim 1, wherein said water collection basin is disposed at a height lower than that of said rain compartment and is in communication therewith through a water guide hole; and cooling water in the rain area chamber enters the water collecting pool through the water guide hole under the gravity.
15. A forced draft cooling tower according to claim 14, wherein the inner bottom surface of the rain compartment is a slope, the slope connecting the water guiding hole to a downward side.
16. A forced draft cooling tower according to claim 1, wherein said exhaust air path comprises a first drum section interfacing with said heat exchange chamber, a second drum section offset from said first drum section, a transition section extending obliquely between said first drum section and said second drum section; the free end opening of the second cylinder section forms the air outlet.
17. A forced draft cooling tower according to claim 16 wherein louvers are provided at said air outlets; the louver blades of the louver are obliquely arranged, so that the through holes in the louver are obliquely towards the inner wall surface of the second cylinder section far away from the transition section.
18. A forced draft cooling tower according to claim 16 wherein a water trap is provided in said first drum section.
19. A forced draft cooling tower according to any of claims 1 to 18, further comprising a water storage tank disposed below the rain compartment and/or water collection tank;
the water storage tank is connected with the water collecting tank through a pump and a pipeline, and water is supplied to the water collecting tank.
20. A cooling tower arrangement comprising at least two forced draft cooling towers according to any of claims 1-19; every two blast-type ventilation cooling towers are arranged in a mirror image mode with air inlet channels arranged in an opposite mode.
21. The cooling tower routing system of claim 20, wherein a distribution bay is provided between two of said forced draft cooling towers, and wherein a water distribution line is provided in said distribution bay for connecting to a water spray device of each of said forced draft cooling towers.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110969500.6A CN113776351B (en) | 2021-08-23 | 2021-08-23 | Air-blast ventilation cooling tower and cooling tower arrangement system |
| PCT/CN2022/103130 WO2023024702A1 (en) | 2021-08-23 | 2022-06-30 | Blowing-type ventilation cooling tower and cooling tower arrangement system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110969500.6A CN113776351B (en) | 2021-08-23 | 2021-08-23 | Air-blast ventilation cooling tower and cooling tower arrangement system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113776351A true CN113776351A (en) | 2021-12-10 |
| CN113776351B CN113776351B (en) | 2023-12-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110969500.6A Active CN113776351B (en) | 2021-08-23 | 2021-08-23 | Air-blast ventilation cooling tower and cooling tower arrangement system |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN113776351B (en) |
| WO (1) | WO2023024702A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023024702A1 (en) * | 2021-08-23 | 2023-03-02 | 中广核工程有限公司 | Blowing-type ventilation cooling tower and cooling tower arrangement system |
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Also Published As
| Publication number | Publication date |
|---|---|
| WO2023024702A1 (en) | 2023-03-02 |
| CN113776351B (en) | 2023-12-29 |
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