CN112484522B - Central air-supplementing wet cooling tower and cooling method - Google Patents

Central air-supplementing wet cooling tower and cooling method Download PDF

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Publication number
CN112484522B
CN112484522B CN202011290478.4A CN202011290478A CN112484522B CN 112484522 B CN112484522 B CN 112484522B CN 202011290478 A CN202011290478 A CN 202011290478A CN 112484522 B CN112484522 B CN 112484522B
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air
air inlet
tower body
tower
wet cooling
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CN112484522A (en
Inventor
黄畅
王卫良
王倩
张琪
王昱乾
甘益明
刘吉臻
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Jinan University
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Jinan University
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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
    • F28F25/02—Component parts of trickle coolers for distributing, circulating, and accumulating liquid
    • F28F25/06—Spray nozzles or spray pipes
    • 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
    • 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
    • F28F25/12—Ducts; Guide vanes, e.g. for carrying currents to distinct zones
    • 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

Abstract

The invention relates to the field of power station cooling systems, and discloses a central air supplementing wet cooling tower for increasing the heat exchange efficiency of a central area of the cooling tower, which comprises: a tower body; the air inlet is formed below the tower body; the air inlet channel is arranged on one side of the air inlet, and cold air can enter the tower body through the air inlet channel; by applying the central air supplementing wet cooling tower, the heat exchange efficiency of the central area of the cooling tower can be increased; the invention also discloses a central air supplementing wet cooling method.

Description

Central air-supplementing wet cooling tower and cooling method
Technical Field
The invention relates to the field of power station cooling systems, in particular to a central air supplementing wet cooling tower.
Background
The natural ventilation cooling tower is a cooling tower which ventilates by the air convection effect formed by the air density difference inside and outside the tower or natural wind power, when the natural ventilation cooling tower is used for cooling, cold air enters from the bottom of the tower body, passes through the heat dissipation material, exchanges heat with hot water sprayed on the heat dissipation material by the water distribution system to form damp and hot air, and rises to the top end of the cooling tower and is discharged.
In the middle of current natural draft cooling tower, cold air gets into the body of the tower through the air intake that sets up in the body of the tower bottom, because the inside drippage that often floats of body of the tower falls down, cold air receives drippage that floats to block and is difficult to reach the body of the tower center, causes the regional heat exchange efficiency in center low.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a central air supplementing wet cooling tower which can increase the heat exchange efficiency of the central area of the cooling tower.
The invention provides a central air supply wet cooling tower, comprising: a tower body; the air inlet is formed below the tower body; and the air inlet channel is arranged on one side of the air inlet, and cold air can enter the interior of the tower body through the air inlet channel.
According to some embodiments of the present invention, the air inlet channel is disposed below the air inlet, the two ends of the air inlet channel are respectively provided with a second air inlet and a second air outlet, the second air inlet is disposed outside the tower body, and the second air outlet is disposed at a central position inside the tower body.
According to some embodiments of the invention, the air outlet direction of the second air outlet is arranged obliquely upwards.
According to some embodiments of the invention, the second air intake opening is flared outwardly.
According to some embodiments of the present invention, the air inlet channel comprises a plurality of air inlet pipes, and the plurality of air inlet pipes are distributed along the circumferential direction of the tower body.
According to some embodiments of the present invention, the central air supply wet cooling tower further comprises a water reservoir disposed below the tower body, and the air inlet duct portion is located in the water reservoir.
According to some embodiments of the present invention, an arc-shaped air guiding portion is disposed at an outlet of the air inlet duct, and the arc-shaped air guiding portion can block floating droplets from entering the air inlet duct.
According to some embodiments of the invention, the air inlet channel comprises an air inlet layer arranged below the tower body, and the air inlet layer is arranged in an overhead manner.
According to some embodiments of the present invention, the central air supplementing wet cooling tower further comprises a water reservoir disposed between the air inlet layer and the tower body.
The invention also provides a central air-supplementing wet cooling method, which applies the central air-supplementing wet cooling tower and comprises the following steps: the cold air enters the tower body through the air inlet and the air inlet channel at the same time to exchange heat with the cooling assembly.
By applying the central air supplementing wet cooling tower, in the cooling process, cold air can enter the interior of the tower body through the first air inlet and the air inlet channel at the same time to participate in heat exchange, so that more air can enter the center of the tower body through the first air inlet and the air inlet channel sequentially, and the air inlet efficiency of the central area is enhanced.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic illustration of a first cooling tower in an embodiment of the present invention;
FIG. 2 is a top cross-sectional view of the throat of FIG. 1;
FIG. 3 is a schematic view of a second cooling tower in an embodiment of the present invention;
the above figures contain the following reference numerals.
Figure BDA0002783650680000021
Figure BDA0002783650680000031
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and more than, less than, more than, etc. are understood as excluding the present number, and more than, less than, etc. are understood as including the present number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.
As shown in fig. 1 and fig. 2, the natural draft and forced draft coupled wet cooling tower of the first aspect of the present embodiment includes: a tower body 100; a first air inlet 140 disposed at a lower portion of the tower body 100; the coupling fan assembly 200 is arranged in the tower body 100, the coupling fan assembly 200 is positioned above the first air inlet 140, and the air outlet direction of the coupling fan assembly 200 is upward; the coupling fan assembly 200 is disposed at the throat of the tower 100.
When the natural ventilation and forced ventilation coupled wet cooling tower is used, cold air enters the tower body 100 through the first air inlet 140, is converted into damp and hot air after passing through the heat exchange assembly, and rises under the action of air convection, meanwhile, the coupling fan assembly 200 can also promote the damp and hot air to rise, the air rising efficiency is increased through the combined action of the air convection and the fan, and the effect of forced ventilation is achieved; meanwhile, as the coupling fan assembly 200 is arranged at the throat part, the airflow blocked by the tower body 100 is greatly reduced, and the fan efficiency is effectively improved.
The cooling tower in this embodiment is modified based on the natural draft cooling tower, so the tower body 100 in this embodiment has the same meaning as the tower body 100 of the cooling tower in the prior art; in the art, the cross-sectional shape of the tower 100 of a natural draft cooling tower is generally curvilinear, preferably hyperbolic, and the throat is the portion of the tower 100 having the smallest cross-sectional area along the axis; therefore, with coupling fan subassembly 200 setting here, coupling fan subassembly 200's air inlet and air-out can not receive the blockking of tower 100 inner wall, and on the other hand, because the above part of throat is the flaring, according to the relevant principle of coanda effect, the air current can be along with the direction acceleration flow of tower 100 inner wall, further increases the rising speed of damp and hot air, increases heat exchange efficiency.
In the embodiment, the cooling assembly has the same structure as that of a common wet cooling tower, and comprises three parts, namely a water eliminator 110, a water distribution system 120 and a heat dissipation material 130, wherein water is conveyed to the water distribution system 120 through a water pump, sprayed onto the heat dissipation material 130 to exchange heat with air, falls into a reservoir 310 and then enters the water pump for recycling; at this time, it is preferable to install the cooling module under the throat, i.e., the cooling module is located under the coupling fan module 200.
In this embodiment, the coupling of the fan assembly 200 means that the fan assembly can add forced ventilation to the fan assembly based on the original natural ventilation, so as to realize the combination of the natural ventilation and the forced ventilation.
As shown in fig. 2, in order to enhance the ventilation performance of the coupling fan assembly 200, the coupling fan assembly 200 may be disposed on the inner wall surface of the tower body 100, so that the airflow of the coupling fan assembly 200 can approach the inner wall of the tower body 100 as much as possible, and the flow guidance is facilitated, at this time, the coupling fan assembly 200 may adopt a plurality of arrangement modes, for example, a single axial flow fan is adopted, so as to cover the cross section of the throat as much as possible, and increase the ventilation amount; a plurality of small axial flow fans can also be arranged on the inner wall of the tower body 100, so that the installation is convenient.
When a single axial flow fan is used, the coupling fan assembly 200 includes a first axial flow fan disposed in the tower body 100, the first axial flow fan is coaxial with the tower body 100, and an air outlet direction of the first axial flow fan faces upward.
Of course, as shown in fig. 2, a plurality of axial fans may be used to ventilate together, and at this time, the coupling fan assembly 200 includes a plurality of second axial fans 210 disposed in the tower body 100, the axes of the second axial fans 210 are parallel to the axis of the tower body 100, and the air outlet direction of the second axial fans 210 is upward; at the moment, the plurality of axial flow fans can be independently installed and independently driven, and compared with the driving of a single large-sized axial flow fan, the load of driving devices such as a motor can be effectively reduced.
Preferably, the second axial fans 210 are uniformly distributed along the circumferential direction of the tower body 100.
As shown in fig. 1, after the rising hot and humid air contacts the blades of the fan, the rising hot and humid air may be condensed into water drops and then thrown by the blades onto the inner wall of the tower body 100, in order to recycle and reuse the water and achieve the effect of saving water, the inner wall of the tower body 100 needs to be provided with a water collecting device 220, and when the condensed water is thrown by the blades to the periphery, the condensed water can be blocked by the water collecting device 220 and fall into the water storage tank 310.
In order to reduce the air resistance brought by the water collecting device 220, the surface of the water collecting device 220 facing the coupling fan assembly 200 is tangent to the inner wall surface of the throat part of the tower body 100, and at the moment, the surface of the water collecting device 220 facing the coupling fan assembly 200 is in smooth transition with the inner wall surface of the tower body 100 without a sharp angle for blocking ascending airflow; at this time, the surface of the water collecting device 220 facing the coupling fan assembly 200 may be a plane or a curved surface; when the water collecting device 220 faces the surface of the coupling fan assembly 200, the curvature radius of the surface can be set to be larger, so that the influence on the air channel of the ascending air flow is reduced as much as possible while the condensed water is effectively blocked.
The embodiment also provides a natural ventilation and forced ventilation coupling wet cooling method, which applies the natural ventilation and forced ventilation coupling wet cooling tower and comprises the following steps: cold air enters the tower body 100 through the first air inlet 140; the cool air entering the tower body 100 is changed into hot and humid air by the cooling unit; the hot and humid air rises by the cooperation of the cool air and the coupling fan assembly 200.
As shown in fig. 3, in a second aspect of the present embodiment, there is provided a vertical multi-stage cooling wet cooling tower, including: a tower body 100; a water reservoir 310 disposed below the tower body 100; the first water receiving tank 410 is arranged between the tower body 100 and the water storage tank 310, and at least part of the first water receiving tank 410 is positioned on the periphery of the water storage tank 310; an air inlet channel is arranged between the first water receiving groove 410 and the water storage tank 310.
It should be noted that the first water receiving trough 410 is at least partially located at the periphery of the water reservoir 310, which means that the projection of the first water receiving trough 410 on the horizontal plane is extended out of the projection of the water reservoir 310, and the inner in the present embodiment means the direction from the outside of the tower 100 to the inside of the tower 100, and the outer is opposite to the inner.
When the vertical multi-stage cooling wet cooling tower is used, cold air enters the tower body 100 through the air inlet channel between the first water receiving tank 410 and the water storage tank 310 and then rises, is converted into damp and hot air after passing through the heat exchange assembly, continues to rise under the action of air convection and then is discharged; because the first water receiving tank 410 blocks part of floating drops from falling, cold air entering the tower body 100 through the air inlet channel can enter more central areas of the tower body 100 to participate in heat exchange, so that the heat exchange efficiency of the central areas of the tower body 100 is greatly improved.
As shown in fig. 3, since the first water receiving tank 410 blocks part of the floating droplets, the cold air can enter the area inside the tower body 100 along the air inlet channel, and in the prior art, after entering through the first air inlet 140 disposed at the side of the tower body 100, the cold air can be blocked by the floating droplets and is difficult to enter the area at the center of the tower body 100, while in the present embodiment, the first water receiving tank 410 can receive the floating droplets above the air inlet channel, so as to reduce the influence of the floating droplets on the air inlet channel; in fig. 2, a small arrow between the first water receiving tank 410 and the water reservoir 310 is an illustration of the direction of the inlet air.
On the other hand, since the first water receiving tank 410 is higher than the water reservoir 310, when the water drips into the first water receiving tank 410, if the first water receiving tank 410 is connected to a water pump, the pump function of the water pump can be reduced by utilizing the gravitational potential of the cooled water, and the energy consumption can be reduced.
As shown in fig. 3, in order to adapt to the structure of the tower body 100 of the revolving body, the first water receiving tank 410 is an annular water receiving tank, and the water reservoir 310 is a circular water reservoir 310.
In order to facilitate the construction of the first water receiving tank 410 and the water storage tank 310, a plurality of support columns are connected between the first water receiving tank 410 and the water storage tank 310, and an air inlet channel is formed between two adjacent support columns; of course, the first water receiving groove 410 and the water reservoir 310 may be integrally disposed, and then an air inlet may be formed on a side wall between the first water receiving groove 410 and the water reservoir 310.
As shown in fig. 3, the outer diameter of the first water receiving tank 410 is larger than that of the water reservoir 310, and the inner diameter of the first water receiving tank 410 is equal to that of the water reservoir 310; at this time, there is no gap between the projections of the first water receiving tank 410 and the water reservoir 310 on the horizontal plane, so that the floating drops can be effectively prevented from falling between the water reservoir 310 and the first water receiving tank 410.
As shown in fig. 3, in order to enable more cold air to enter the central area in the tower body 100, the cooling tower further includes a second water receiving tank 420, the second water receiving tank 420 is located between the first water receiving tank 410 and the water reservoir 310, an air inlet channel is arranged between the second water receiving tank 420 and the first water receiving tank 410, and an air inlet channel is arranged between the second water receiving tank 420 and the water reservoir 310; at this time, the plurality of air inlet channels are arranged in a stepped manner, and the air inlet channels which go downwards are closer to the center of the tower body 100, so that the air entering the central area of the tower body 100 is effectively increased.
At this time, the first water receiving groove 410 and the second water receiving groove 420 are both annular water receiving grooves, and the water reservoir 310 is a circular water reservoir 310.
Of course, it is possible to design a multi-stage annular water receiving tank based on the structure shown in fig. 3, wherein the radius of the bottommost water reservoir 310 is R1The width of the circular water tank at the upper stage of the water reservoir 310 is R2And by analogy, the width of the annular water storage tank of the i-1 level above the water storage tank 310 is RiAnd the outer diameter of the annular water receiving groove with the largest radius, namely the radius of the original water collecting tank is R0(ii) a On the other hand, the height of the first intake vent 140 is defined as the vertical height H from the top end of the first intake vent 140 to the bottom wall of the water reservoir 3100And the vertical height of the annular water storage tank at the first level above the water storage tank 310 from the water storage tank 310 is h1The vertical height of the annular reservoir at two levels above the reservoir 310 and one level above the reservoir 310 is h2And then the rest can be analogized to obtain hi(ii) a For this purpose, the following two schemes determine the respective stagesRiAnd Hi。
Scheme 1:
Figure BDA0002783650680000081
scheme 2:
Figure BDA0002783650680000082
wherein, annular water receiving tank and the cistern 310 of each level all communicate with the water pump of cooling module.
The embodiment also provides a three-dimensional multistage cooling method, which utilizes the three-dimensional multistage cooling wet cooling tower to comprise the following steps: the cold air enters the central region of the tower body 100 through the air inlet channel between the first water receiving groove 410 and the water reservoir 310, and exchanges heat with the heat exchange assembly.
As shown in fig. 1, a third aspect of the present embodiment provides a bottom water receiving and flow field enhanced wet cooling tower, including: a tower body 100; a first air inlet 140 disposed at a lower end of the tower body 100; and a wind shielding structure disposed at the first wind inlet 140, wherein the wind shielding structure can block air from blowing out of the first wind inlet 140 from the interior of the tower body 100.
By applying the bottom water receiving and flow field strengthening wet cooling tower of the embodiment, in the cooling process, cold air enters the tower body 100 through the air inlet channel between the first water receiving tank 410 and the water storage tank 310 and then rises, is converted into damp and hot air after passing through the heat exchange assembly, continues to rise under the action of air convection, and generates a certain amount of floating and dropping in the process to drive the air to fall; when the air falls to the bottom and flows towards the first air inlet 140, the air is blocked by the wind shielding structure and cannot be discharged from the first air inlet 140, so that the interference to normal air inlet is effectively reduced, a high-pressure area is formed in the tower bottom, and the ventilation in the tower is enhanced; meanwhile, air carrying water vapor is blocked inside the tower body 100, so that the loss of water vapor is effectively reduced, and the consumption of cooling water is saved.
Various schemes can be adopted, so that the wind shielding structure can reduce the influence on normal wind inflow while blocking the reverse flow, for example, the wind shielding structure is rotatably connected with the tower body 100, the wind inlet is closed when the reverse flow occurs, and the wind inlet is opened when the reverse flow is weakened; or the scheme that the wind shielding structure is fixedly connected with the tower body 100 is adopted, at the moment, the wind shielding structure can partially seal the air inlet, and the influence on normal air inlet is reduced while the reverse flow is blocked.
At this time, as shown in fig. 1, a louver assembly 150 may be disposed at the bottom end of the first intake vent 140, and the height of the louver assembly 150 is smaller than the height of the first intake vent 140, so that the louver assembly 150 can only cover a partial range of the first intake vent 140, leaving a passage for normal intake air.
At this time, the louver assembly 150 may be set to a fixed angle, or a driving device such as a motor or an air cylinder may be provided on the tower body 100 to drive the louver assembly 150 to adjust the angle; in the present embodiment, the angle between the louver assembly 150 and the horizontal plane is preferably 0-20 degrees, so as to provide a better blocking effect for the reverse flow.
Further, to balance the advantages of blocking reverse flow and the disadvantages of blocked intakes, the height H of the first intake vents 1400And height H of shutter assembly 150bySatisfy Hby＝0.5H0。
Further, the height H of the louver assembly 150byAnd the degree of closure of the louver assembly 150, i.e., the height H of the bottom end of the louver assembly 150by_rCan be determined according to the following scheme;
knowing the height H of the air inlet0；
Louver assembly 150 window height Hby＝0.5×H0；
150 window degree of closure H of shutter assemblyby_r＝P/Prated×Hby+Mh；
Wherein P is the generating power of the unit, PratedFor rated power of the unit, MhA function for correcting thermal load;
Md＝((Dc-Dc,rated)/Dc,rated+(ΔH-ΔHrated)/ΔHrated)×Hby；
wherein DcFor exhaust flow, Dc,ratedRated exhaust flow under the working condition, delta H is latent heat of exhaust, delta HratedThe rated latent heat of steam discharge under the working condition.
On the other hand, in order to reduce the construction difficulty of the cooling tower, the wind shielding structure can also adopt a wind shielding plate, the wind shielding plate is arranged at the bottom end of the first air inlet 140, and the wind shielding plate covers a partial range of the first air inlet 140; at this time, the wind deflector can be directly and fixedly connected to the fixing frame at the bottom of the tower body 100, so that the wind deflector is fixed on the outer side or the inner side of the tower body 100; the outside and inside, as referred to herein, are based on the body of the tower 100.
Similar to louver assembly 150, to block reverse flow while reducing the effect of the louvers on normal intake air, the height H of the louvers is0And height H of wind deflectorbySatisfy Hby＝0.5×H0(ii) a The height of the wind shield refers to the distance between the highest position of the wind shield and the bottom wall of the water pool at the bottom of the cooling tower.
The embodiment further provides a bottom water receiving and flow field enhanced wet cooling method, which applies the bottom water receiving and flow field enhanced wet cooling tower and comprises the following steps: cold air enters the tower body 100 through the first air inlet 140, and forms floating drops to fall after exchanging heat with the cooling assembly; the falling flying droplets drive air to blow from the bottom of the tower body 100 to the first air inlet 140; air blown toward the first air inlet 140 is blocked by the wind shielding structure.
As shown in fig. 1, the central air supply wet cooling tower according to the fourth aspect of the present embodiment includes: a tower body 100; the air inlet is formed below the tower body 100; and the air inlet channel is arranged on one side of the air inlet, and cold air can enter the tower body 100 through the air inlet channel.
Use the wet-type cooling tower of central authorities' air supplementation of this embodiment, in the middle of the cooling process, cold air can get into body of the tower 100 inside through first air intake 140 and inlet air duct simultaneously, participates in the heat transfer for more air can loop through first air intake 140 and inlet air duct and enter into the position at body of the tower 100 center, thereby has strengthened the efficiency of the regional air inlet in center.
The air inlet channel may be established in various ways to enable cold air to directly enter the tower body 100, for example, a plurality of air inlet pipes are arranged in the cooling tower to communicate the outside atmosphere with the inside of the tower body 100, or a separate air inlet layer is arranged below the water reservoir 310; the second air inlet duct 320 in fig. 1 is an air inlet duct.
It should be noted that, the inside of the tower body 100 in this embodiment refers to a space for heat exchange in the cooling tower; rather than the interior of the body material of the tower 100.
In order to increase the air intake of the central area as much as possible, the air intake channel is arranged below the air inlet, two ends of the air intake channel are respectively provided with a second air inlet 321 and a second air outlet 322, the second air inlet 321 is arranged outside the tower body 100, and the second air outlet 322 is arranged in the central position inside the tower body 100; at this time, one path of cold air enters the tower body 100 from the first air inlet 140, and the other path of cold air enters from the second air inlet 321 and enters the central area inside the tower body 100 after exiting from the second air inlet 321.
As shown in fig. 1, the air outlet direction of the second air outlet 322 may be set to be inclined upward, so as to guide the airflow entering the tower body 100.
On the other hand, in order to accelerate the airflow entering the air intake channel, the second air intake 321 is flared outwards; according to the bernoulli theorem, the flow velocity of the air flow is increased after the air flow passes through the second air inlet 321 with the outward flaring, and the air inlet efficiency is improved.
In fig. 1, the air supply channel reaches the central area of the tower, and the cooled water drops into this channel; in addition, the recess of fig. 1 is connected to the water reservoir 310, and an additional pumping device is not required.
As shown in fig. 1, the second air outlet 322 is slightly smaller than the second air inlet 321, and according to the gas flow dynamics principle, when the gas flow velocity is smaller than the local sound velocity, the gas flow is accelerated by using a tapered channel.
In order to reduce the difficulty of arrangement of the air inlet channel, the air inlet channel comprises a plurality of air inlet pipes, and the air inlet pipes are distributed along the circumferential direction of the tower body 100; at this time, a plurality of air inlet pipes extend from the outside of the tower body 100 to the inside of the tower body 100.
As shown in fig. 1, an arc-shaped air guiding portion 323 is disposed at an outlet of the air inlet duct, and the arc-shaped air guiding portion 323 can block floating droplets from entering the air inlet duct; when floating drops fall off in the central area inside the tower body 100, the arc-shaped air guide part 323 can prevent the floating drops from falling into the air inlet channel; meanwhile, the arc-shaped air guiding portion 323 can diffuse the airflow around after the airflow is discharged from the second air outlet 322.
The embodiment also provides a central air-supplementing wet cooling method, which applies the central air-supplementing wet cooling tower and comprises the following steps: the cold air enters the tower body 100 through the air inlet and the air inlet channel at the same time, and exchanges heat with the cooling assembly.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.

Claims (10)

1. Central authorities mend wind wet cooling tower, its characterized in that includes:
a tower body (100);
the air inlet is formed below the tower body (100);
the first air inlet (140) is arranged at the lower part of the tower body (100);
the coupling fan assembly (200) is arranged in the tower body (100), the coupling fan assembly (200) is positioned above the first air inlet (140), and the air outlet direction of the coupling fan assembly (200) is upward;
the water collecting device (220) is arranged on the inner wall of the tower body (100), the water collecting device (220) is positioned above the coupling fan assembly (200), the surface of the water collecting device (220) facing the coupling fan assembly (200) is tangent to the inner wall surface of the throat part of the tower body (100), and the surface of the water collecting device (220) facing the coupling fan assembly (200) is a curved surface;
and the air inlet channel is arranged on one side of the air inlet, and cold air can enter the tower body (100) through the air inlet channel.
2. The wet cooling tower of claim 1, wherein the air intake channel is disposed below the air intake, a second air intake (321) and a second air outlet (322) are disposed at two ends of the air intake channel, respectively, the second air intake (321) is disposed outside the tower body (100), and the second air outlet (322) is disposed at a central position inside the tower body (100).
3. The wet cooling tower of claim 2, wherein the outlet direction of the second outlet (322) is inclined upward.
4. Central makeup wet cooling tower according to claim 2, characterized in that said second air intakes (321) are flared outwards.
5. The wet cooling tower of claim 1, wherein said air inlet channel comprises a plurality of air inlet pipes, said plurality of air inlet pipes being distributed along a circumferential direction of said tower body (100).
6. The central air supplementing wet cooling tower according to claim 5, further comprising a water reservoir (310) disposed below the tower body (100), wherein the air inlet duct portion is located in the water reservoir (310).
7. The central air supply wet cooling tower according to claim 5, wherein an arc-shaped air guide part (323) is arranged at the outlet of the air inlet pipe, and the arc-shaped air guide part (323) can block floating droplets from entering the air inlet pipe.
8. The wet cooling tower according to claim 1, wherein the air intake channel comprises an air intake layer disposed below the tower body (100), the air intake layer being disposed in an overhead manner.
9. The central updraft wet cooling tower of claim 8, further comprising a water reservoir (310), said water reservoir (310) being disposed between said air intake floor and said tower body (100).
10. The central air-supplementing wet cooling method which uses the central air-supplementing wet cooling tower of any one of claims 1 to 9, is characterized by comprising the following steps:
cold air enters the tower body (100) through the air inlet and the air inlet channel at the same time to exchange heat with the cooling assembly.
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CN101699210B (en) * 2009-04-30 2012-01-04 山东大学 Fresh air supply system for cooling tower
CN203605791U (en) * 2013-10-15 2014-05-21 济南达能动力技术有限责任公司 Air supplement tube
CN203534247U (en) * 2013-11-15 2014-04-09 山东大学 Wet cooling tower with air distribution pore plate
KR101600952B1 (en) * 2015-09-08 2016-03-21 (주)풍천엔지니어링 Counterflow cooling tower having a multiple fan
CN107543447B (en) * 2017-09-30 2024-01-26 华北电力大学（保定） Natural ventilation wet cooling tower ventilation device

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