CN215572282U - Fog dispersal module and cooling tower - Google Patents

Abstract

The utility model provides a fog dissipation module and a cooling tower, wherein the fog dissipation module comprises enclosing plates which enclose with each other to form a cavity, and heat exchangers which are obliquely arranged are arranged in the enclosing plates and used for cross-flow heat exchange of wet saturated air and dry air; at least one group of turbulence structures is arranged on the inner wall of the enclosing plate, and the turbulence structures are located above the heat exchanger. The fog dispersal module can disturb and guide cold saturated air and hot dry air after heat exchange, and realizes full mixing and smooth discharge; the turbulence structure is provided with the through hole and the turbulence fins, so that the retention time of air in the turbulence structure and the collision effect of the air and the side wall of the through hole can be prolonged, and the fog dissipation and water saving performance can be improved; simple structure, be convenient for production and processing and to the transformation of current condensing tower.

Description

Fog dispersal module and cooling tower

Technical Field

The utility model relates to the technical field of cooling towers, in particular to a fog dispersal module and a cooling tower.

Background

The cooling tower is an evaporation heat dissipation device which utilizes the principle that heat is carried out by volatilization of steam to achieve evaporation heat dissipation, convection heat transfer, radiation heat transfer and the like to dissipate waste heat generated in industry or refrigeration air conditioners for cooling.

After entering the cooling tower, the outside air is heated and humidified and is discharged from the top by the driving of a fan; since the air is in a saturated state, the air discharged from the cooling tower is rapidly condensed into a plurality of tiny liquid drops when being cooled, and the liquid drops are dispersed in the air and show a white state through the refraction of sunlight, so that the surrounding environment is influenced, and the white state is called white fog or white smoke. In recent years, cooling tower smoke generation has attracted increased attention due to increased awareness of social environmental concerns.

For this reason, various cooling towers with a mist elimination function are being developed and put into operation. For example, chinese patent application No. 201921064255.9 discloses a counter-flow type fog dispersal cooling tower, wherein a heat exchange module is arranged above a water collector, and two paths of mutually crossed airflow channels are arranged in the heat exchange module; a partition plate for isolating the two air flow channels is arranged below the heat exchange module; the side plates at two sides of the tower body are provided with vent holes, and the vent holes are provided with movable air doors which can form a sealing structure with the partition plate after being turned over and opened, so that the rapid switching between a fog dissipation working condition and a non-fog dissipation working condition is realized; however, the structure is not provided with water collectors such as baffle plates or corrugated plates, the water collecting effect is poor, and the operation cost is high; the Chinese patent application No. 201810331853.1 discloses a fog dispersal cooling tower with a fog dispersal module, which comprises a tower body and a water distribution system, wherein the fog dispersal module is arranged in the tower body, the water distribution system comprises a dry water distribution pipe and a wet water distribution pipe, the dry water distribution pipe and the wet water distribution pipe are both provided with splashing devices, the fog dispersal module is internally provided with a dry cooling channel and a wet cooling channel which are mutually separated, the splashing devices on the dry water distribution pipe correspond to the wet cooling channel, the splashing devices on the wet water distribution pipe correspond to the dry cooling channel, but the water collection effect is poor, and continuous water supplement is needed; meanwhile, after the upper part of the cooling tower is provided with the plurality of flow guide devices, the difficulty in reforming the existing cooling tower is high.

In addition, the existing cooling tower mostly adopts the forms of baffle plates or corrugated plates and the like to separate gas from liquid through collision effect and the like so as to collect the moisture carried by the air in the tower, but the existing cooling tower has large resistance to the air flow and high energy consumption; therefore, it is urgently needed to design a fog dispersal module which has good water collection effect, controllable operation cost and is convenient to reform the existing cooling tower.

SUMMERY OF THE UTILITY MODEL

The utility model solves the problems that the existing cooling tower is difficult to reform for fog dissipation, the water collecting effect is poor and continuous water replenishing is needed in the prior art.

In order to solve the problems, the utility model provides a fog dispersal module, which comprises enclosing plates which enclose each other to form a cavity, wherein a heat exchanger which is obliquely arranged is arranged in the cavity and is used for cross-flow heat exchange of wet saturated air and dry air; at least one group of turbulence structures is arranged on the inner wall of the enclosing plate, and the turbulence structures are located above the heat exchanger.

The turbulence structures can be provided with two or more groups which are symmetrically or alternatively arranged on the coamings. The turbulent flow component is arranged above the fog dispersal module and is used for performing turbulent flow on cold saturated air and hot dry air after heat exchange, so that the full mixing of the wet saturated air and the hot dry air is facilitated; meanwhile, the flowing direction of the gas is guided, so that the mixed gas can be smoothly discharged out of the cooling tower; in addition, the modularized production is convenient, and the transformation difficulty of the existing cooling tower is small.

Preferably, the spoiler structure includes the first spoiler that the slope set up, first spoiler sets up a plurality of through-holes, the cross-section of through-hole is "rectangle" or "S" type.

The device can guide the mixed airflow after heat exchange and reduce the resistance to the airflow; in addition, small droplets possibly carried by wet saturated air are subjected to gas-liquid separation through collision action, inertia force and the like to achieve the purpose of water collection; the S-shaped through hole can prolong the retention time of air in the S-shaped through hole, further increase the collision with the side wall, and has good gas-liquid separation effect, water saving and good fog dispersal performance.

Preferably, a first turbulence fin and/or a second turbulence fin are/is arranged in the through hole, one end of each of the first turbulence fin and the second turbulence fin is connected with the inner wall surface of the through hole, and the other end of one end of each of the first turbulence fin and the second turbulence fin extends towards the central axis direction of the through hole.

The arrangement further increases the mutual collision effect of small liquid drops in the air passing through the through hole, the gas-liquid separation efficiency is improved, and the number of the turbulence fins can be set according to the gas-liquid separation effect and the airflow resistance.

Preferably, the first turbulence fins are located on one side of the through hole, the second turbulence fins are located on the other side, opposite to the first turbulence fins, of the through hole, and the first turbulence fins and the second turbulence fins are arranged in a staggered mode. The device has the advantages of good gas-liquid separation effect, small resistance, water saving, energy saving and the like; meanwhile, the structure is simple, and the production and the processing are convenient.

Preferably, the spoiler structure further comprises a second spoiler, the first spoiler is located on the upper side of the second spoiler, included angles between the first spoiler and the horizontal plane and included angles between the second spoiler and the horizontal plane are respectively alpha and beta, and widths of the first spoiler and the second spoiler are respectively L1 and L2, wherein alpha is less than beta and less than 90 degrees and/or L1 is greater than L2. The structure of the second spoiler can be the same as or different from that of the first spoiler.

Preferably, the spoiler structure further includes a third spoiler, the third spoiler is located on a side of the second spoiler far away from the first spoiler, an included angle between the third spoiler and the horizontal plane is γ, a width of the third spoiler is L3, wherein β < γ < 90 ° and L2 > L3 are provided. The device can give consideration to the functions of diversion and turbulence of the air flow and the resistance formed on the air flow, and has the advantages of simple structure and convenience in production and processing.

Preferably, the lengths of the first spoiler, the second spoiler and the third spoiler are H1, H2 and H3, wherein H1 > H2 > H3. The lower spoiler is prevented from interfering with the upper spoiler by the aid of the lower spoiler.

Preferably, a first airflow channel and a second airflow channel which are arranged in a mutually crossed manner are arranged in the heat exchanger, a baffle plate is arranged below the heat exchanger, a first inlet is formed in one side of the baffle plate and used for conveying dry air to the first airflow channel, and a second inlet is formed in the other side of the baffle plate and used for conveying wet saturated air to the second airflow channel. Preferably, the heat exchanger is horizontally arranged at an angle of 45 degrees.

The baffle is used for keeping apart the dry air that gets into first air current passageway through first import, the wet saturated air that gets into second air current passageway through the second import each other, two tunnel airflows carry out the heat transfer through the medium that constitutes heat transfer module in heat transfer module, thereby with the condensation of damp and hot air current, the absolute humidity reduces behind the damp and hot air current passing heat transfer module, the temperature reduces, relative humidity is 100%, the absolute humidity is unchangeable behind the external dry cold air current passing heat transfer module, the temperature rises, two tunnel airflows form the unsaturated air after mutually mixing in heat transfer module top and pass through the fan and discharge to the atmosphere, thereby eliminate white smoke.

Compared with the prior art, the fog dispersal module has the following beneficial effects: 1) the fog dispersal module can disturb and guide cold saturated air and hot dry air after heat exchange by arranging a disturbing flow structure, and realizes full mixing and smooth discharge; (2) through the through holes and the turbulence fins arranged on the turbulence structure, the residence time of air in the turbulence structure can be prolonged, and the collision with the side wall is increased so as to improve the gas-liquid separation effect; 3) simple structure, the transformation of the existing condensing tower is convenient for production and calibration.

The utility model also provides a cooling tower which comprises at least one fog dispersal module. The cooling tower has the same beneficial effects as the fog dispersal module, and the details are not repeated herein.

Preferably, the cooling tower comprises a tower body, the tower body is provided with a first louver, a filler is arranged in the tower body, the first louver is arranged below the filler, a water distribution structure, a water collector and a cubic fog dissipation module are sequentially arranged above the filler, and the first louver is communicated with the second inlet. After the outside air enters the tower body through the first louver, the water and air flow perform sufficient heat exchange when passing through the filler, then the water distribution structure is utilized to perform humidification and cooling to form wet and cold air, and the wet and cold air upwards enters the second air flow channel through the second inlet to perform cross flow heat exchange.

Drawings

FIG. 1 is a schematic structural diagram of a cooling tower according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a defogging module according to an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a heat exchanger according to an embodiment of the present invention;

fig. 4 is a front view of the first spoiler in accordance with the embodiment of the present invention;

FIG. 5 is a cross-sectional view of the first spoiler in accordance with an embodiment of the present invention;

FIG. 6 is a cross-sectional view of another first spoiler in accordance with an embodiment of the present invention;

FIG. 7 is a schematic structural diagram of two fog dispersal modules connected in parallel in the embodiment of the present invention;

FIG. 8 is a schematic structural diagram of three defogging modules connected in parallel according to an embodiment of the present invention;

fig. 9 is a schematic structural diagram of four defogging modules connected in parallel in the embodiment of the utility model.

Description of reference numerals:

1-a tower body; 2-a filler; 3-a first louver; 4-a second louver; 5-water collector; 6-fog dispersal module; 61-a heat exchanger; 611 — a first air flow channel; 612-a second airflow channel; 62-a baffle; 63-enclosing plates; 64-a flow disturbing structure; 641-a first spoiler; 642-a second spoiler; 643-a third spoiler; 644-through hole; 645 — first turbulator fins; 646-a second turbulator fin; 65-first inlet; 66-a second inlet; 7-a fan; 8-water distribution structure; 9-motor.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.

It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.

In addition, the descriptions related to "first", "second", etc. in the present invention are only for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature.

The traditional cooling tower has large water evaporation capacity, and particularly an open cooling tower is easy to form 'white smoke' when the environmental temperature is low or the water inlet temperature of the cooling tower is high; in winter, the 'white smoke' is diffused to easily shield the sight line or cause the road to be frozen, thereby causing potential safety hazards. In the prior art, the fog dispersal module 6 is usually required to be arranged in the cooling tower during the construction process, and for the cooling tower which is put into production and used, the inner wall of the cooling tower is provided with the turbulence piece, so that the fog dispersal module 6 is difficult to install and difficult to transform; the simple assembly of the fog dispersal module 6 into the cooling tower can change the operation parameters of the existing cooling tower, such as the problems of increased airflow resistance, mismatched water collection effect and the like; for this reason, the applicant has proposed the following technical means through research.

As shown in fig. 1, a cooling tower includes a tower body 1, the tower body 1 is disposed above a water pool (not shown in the figure), a filler 2 is disposed inside the tower body 1, a water distribution structure 8, a water collector 5, and a fog dispersal module 6 are sequentially disposed above the filler 2, an air duct (not shown in the figure) communicated with the fog dispersal module 6 is disposed above the fog dispersal module 6, a fan 7 is disposed in the air duct, and a motor 9 is disposed above the fan 7 for driving the fan 7 to rotate to suck air; when the fog dissipation module 6 is used for reforming the initial cooling tower, only the original cooling tower frame needs to be properly heightened, the fog dissipation module 6 is installed above the water collector 5 of the original cooling tower, and the fan 7 with matched power is replaced. As shown in fig. 7-9, the defogging modules 6 can be used singly or in parallel according to the size of the open cooling tower.

The tower body 1 is provided with a first louver 3 communicated with the fog dispersal module 6, and the first louver 3 is arranged below the filler 2 and used for adjusting the flow of the wet and cold air in the tower body 1; after external air enters the tower body 1 through the first louver 3, the water and air flow perform sufficient heat exchange when passing through the filler 2, and then the water distribution structure 8 is utilized to perform humidification and cooling to form wet and cold air which enters the fog dissipation module 6 upwards; as an example of the present invention, the water collector 5 includes a plurality of first hollow plates, a first cooling water channel is disposed inside the first hollow plates, and a first air channel is formed between any two adjacent first hollow plates, that is, the first cooling water channel and the first air channel perform partition-type heat exchange through the plate walls of the first hollow plates, so that on one hand, small droplets carried by air are separated by collision, inertia force, and the like; and simultaneously, condensing and separating out water vapor in the cooled and cooled air and collecting the water vapor. The structures and materials of the water distribution structure 8 and the filler 2 are the prior art, and are not described herein.

As shown in fig. 2 and 3, as an example of the present invention, the defogging module 6 includes a surrounding plate 63 surrounding each other to form a cavity, an airflow outlet is formed at the top of the surrounding plate 63, a heat exchanger 61 inclined at 45 ° to the horizontal plane is disposed in the cavity, preferably, the heat exchanger 61 is a dividing wall type heat exchanger, a first airflow channel 611 and a second airflow channel 612 are disposed in the heat exchanger 61 and intersect with each other, the first airflow channel 611 is used for entering one of wet saturated air and dry air, and the second airflow channel 612 is used for entering the other one of wet saturated air and dry air; the device can realize cross flow heat exchange of wet saturated air and dry air. Preferably, the first air flow channel 611 and the second air flow channel 612 respectively enter dry air and wet saturated air.

A baffle 62 for isolating the gas entering the first gas flow channel 611 and the second gas flow channel 612 is arranged below the heat exchanger 61. As an example of the present invention, the upper end of the baffle 62 is connected to an edge of the heat exchanger 61. Preferably, the baffle 62 is vertically fixed at the bottom of the defogging module 6, and the baffle 62 is connected with the edge of the lowest end of the heat exchanger 61. Preferably, the fog dispersal module 6 is a rectangular parallelepiped structure, the heat exchanger 61 arranged inside the fog dispersal module is a plate-type structure, and the cross section of the fog dispersal module is square or rhombic. Preferably, a turbulence structure 64 is arranged above the fog dispersal module 6 and used for further separating water drops, so that the fog dispersal and water saving effects of the fog dispersal module 6 are improved. Preferably, the flow disturbing structure 64 is arranged on the inner wall of the enclosing plate 63 at least on one side of the fog dispersing module 6. Preferably, the spoiler structures 64 are arranged on the enclosing plates 63 at two sides in pairs, and the specific inclination angle and the number distribution of the spoiler structures are determined according to the flow ratio of the dry air to the wet air. A first inlet 65 is arranged on one side of the baffle plate 62, and a second shutter 4 is arranged at the position of the first inlet 65 and used for supplying dry air to the first air flow channel 611 of the heat exchanger 61 and adjusting the flow rate of the dry air; the other side of the baffle plate 62 is provided with a second inlet 66, and the second inlet 66 is communicated with the first louver 3 and used for conveying the wet cold air into a second air flow channel 612 of the heat exchanger 61. Preferably, the first inlet 65 is located on the enclosure 63, the first inlet 65 may be multiple, and the second inlet 66 is located at the bottom of the defogging module 6.

As an example of the present invention, the spoiler structure 64 includes a first spoiler 641 and a second spoiler 642 obliquely disposed on the surrounding plate 63, wherein the first spoiler 641 is located above the second spoiler 642, that is: the first spoiler 641 is disposed near an outlet of the fog dispersal module 6. Preferably, the included angles between the first spoiler 641 and the horizontal plane and the included angles between the second spoiler 642 and the horizontal plane are α and β, respectively, where α < β < 90 °; the widths of the first spoiler 641 and the second spoiler 642 are L1 and L2, wherein L1 is less than L2; the lengths of the first spoiler 641 and the second spoiler 642 are H1 and H2, respectively, wherein H1 > H2. This setting can compromise vortex structure 64 to the water conservancy diversion of mist, vortex effect, avoids forming the vortex, and the air current resistance is little. The number of the first spoilers 641 and the second spoilers 642 is two, and the first spoilers and the second spoilers are symmetrically or alternatively arranged on the left side and the right side of the fog dispersal module 6. Preferably, two first spoilers 641 and/or two second spoilers 642 are symmetrically disposed on two sides of the fog dispersal module 6. As another example of the present invention, the spoiler structure 64 further includes a third spoiler 643, the third spoiler 643 is located on a side of the second spoiler 642 away from the first spoiler 641, that is, located below the second spoiler 642, an included angle between the third spoiler 643 and a horizontal plane is γ, a width is L3, and a length is H3, where β < γ < 90 ° and L2 < L3, and H2 > H3 are provided.

The first spoiler 641 has a rod shape or a plate shape, and the cross section of the first spoiler 641 may be an isosceles triangle or a rectangle, and the second spoiler 642 and/or the third spoiler 643 may have the same or different structure from the first spoiler 641. As shown in fig. 4 and 5, the first spoiler 641 is provided with a plurality of through holes 644, and the direction of the through holes 644 is substantially consistent with the direction of the mixed airflow. This setting can reduce the resistance to the air current in the water conservancy diversion, retrieves through effects such as collision to the liquid drop that wet saturated air probably carried simultaneously, improves water collection efficiency. The cross section of the through hole 644 is rectangular or S-shaped; preferably, a first turbulence fin 645 is disposed in the through hole 644, and the first turbulence fin 645 extends toward the through hole 644. The arrangement can prolong the retention time of the mixed gas in the through hole 644 and increase the collision with the side wall, thereby realizing the gas-liquid separation of small liquid drops in the air, saving water and having good fog dissipation performance. As another example of the present invention, a second spoiler fin 646 is further disposed in the through hole 644, and the second spoiler fin 646 is located on the other side of the through hole 644, which is opposite to the first spoiler fin 645. Preferably, the first disturbing fin 645 and the second disturbing fin 646 are arranged in a staggered manner.

The fan 7 positioned at the top end of the cooling tower generates suction force, external air is sucked to the bottom of the cooling tower through the first louver 3, after the temperature is pre-raised by the filler 2, the external air passes through the water distribution structure 8 and the water collector 5 upwards in sequence to form wet and cold air, and the wet and cold air upwards enters the second air flow channel 612 of the heat exchanger 61 through the second inlet 66; meanwhile, dry air enters the first air flow channel 611 through the first louver 3 and carries out cross flow heat exchange with wet air in the second air flow channel 612, and a part of condensed water separated out by cooling and condensing of the wet saturated air flows back to the water tank at the bottom of the cooling tower along the pipe wall of the heat exchanger 61; the dry air is heated to become hot dry air through heat exchange, the hot dry air and the cooled and condensed low-temperature wet saturated air flow out from the upper part of the heat exchanger 61, are fully and uniformly mixed under the guide effect of the turbulence structure 64 to become unsaturated air, and are discharged out of the cooling tower to ensure that no 'white smoke' is generated.

Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the utility model as defined in the appended claims.

Claims (10)

1. A fog dispersal module is characterized by comprising surrounding plates (63) which mutually surround to form a cavity, wherein a heat exchanger (61) which is obliquely arranged is arranged in the cavity and is used for cross-flow heat exchange of wet saturated air and dry air; at least one group of turbulence structures (64) are arranged on the inner wall of the enclosing plate (63), and the turbulence structures (64) are located above the heat exchanger (61).

2. The module according to claim 1, characterized in that the spoiler structure (64) comprises a first spoiler (641) arranged obliquely, the first spoiler (641) being provided with a plurality of through holes (644), the cross-section of the through holes (644) being "rectangular" or "S" shaped.

3. The defogging module according to claim 2, wherein a first disturbing fin (645) and/or a second disturbing fin (646) are arranged in the through hole (644), one end of each of the first disturbing fin (645) and the second disturbing fin (646) is connected with the inner wall surface of the through hole (644), and the other end of each of the first disturbing fin and the second disturbing fin extends towards the central axis direction of the through hole (644).

4. The defogging module according to claim 3, wherein the first disturbing fin (645) is positioned on one side of the through hole (644), the second disturbing fin (646) is positioned on the other side of the through hole (644) opposite to the first disturbing fin (645), and the first disturbing fin (645) and the second disturbing fin (646) are arranged in a staggered manner.

5. The module according to any of claims 2 to 4, wherein the spoiler structure (64) further comprises a second spoiler (642), the first spoiler (641) being located on an upper side of the second spoiler (642), the first spoiler (641) and the second spoiler (642) being angled with respect to the horizontal plane by an angle α and a angle β, respectively, and by a width L1 and a width L2, respectively, wherein α < β < 90 ° and/or L1 > L2 are provided.

6. The module according to claim 5, wherein the spoiler structure (64) further comprises a third spoiler (643), wherein the third spoiler (643) is located on a side of the second spoiler (642) facing away from the first spoiler (641), and wherein the third spoiler (643) forms an angle γ with a horizontal plane and has a width L3, wherein β < γ < 90 ° and L2 > L3.

7. The module according to claim 6, characterized in that the lengths of the first spoiler (641), the second spoiler (642), the third spoiler (643) are H1, H2, H3, wherein H1 > H2 > H3.

8. The defogging module according to claim 1, wherein a first air flow channel (611) and a second air flow channel (612) are arranged in the heat exchanger (61) in a mutually crossing manner, a baffle (62) is arranged below the heat exchanger (61), a first inlet (65) is arranged on one side of the baffle (62) and used for conveying dry air to the first air flow channel (611), and a second inlet (66) is arranged on the other side of the baffle (62) and used for conveying wet saturated air to the second air flow channel (612).

9. A cooling tower, characterized in that it comprises at least one defogging module (6) according to any one of claims 1-8.

10. The cooling tower according to claim 9, characterized in that the cooling tower comprises a tower body (1), the tower body (1) is provided with a first louver (3), a filler (2) is arranged in the tower body (1), the first louver (3) is arranged below the filler (2), a water distribution structure (8), a water collector (5) and the fog dissipation module (6) in a cubic shape are sequentially arranged above the filler (2), and the first louver (3) is communicated with a second inlet (66).

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