KR101293915B1 - Cooling tower - Google Patents

Abstract

PURPOSE: A cooling tower is provided to effectively prevent the generation of white smoke by heating exhaust discharged to the outside with cooling water with high temperature. CONSTITUTION: A cooling tower comprises a case (110a), an air supply outlet (120a), an air outlet (130a), a heat exchanger (140a), a water injection unit (150a), a ventilation fan (160a), a white smoke prevention coil (180a), and an outside air mixing unit (190a). The case has a passage which air comes in and goes out from and cooling water moves through. The air supply outlet inhales outside air. The air outlet ejects indoor air. The heat exchanger cools the cooling water with high temperature in a load unit. The water injection unit sprays the cooling water on the heat exchanger. The ventilation fan presses or inhales the outside air into the passage. The white smoke prevention coil additionally heats a heat-exchanged air. The outside air mixing unit mixes the heat-exchanged air with the outside air of the case. [Reference numerals] (80) Control unit; (81) Temperature detection unit; (82) Humidity detection unit

Description

Cooling tower

The present invention relates to a cooling tower, and more particularly to a cooling tower that can effectively eliminate the generation of white smoke generated in the cooling tower.

Cooling tower is a kind of heat exchanger that cools the cooling water by direct or indirect contact with the outdoor air in order to use the cooling water used in the indoor unit of the air conditioning system. The cooling water of the cooling tower is circulated through the indoor unit and the cooling water line used for cooling and heating of the air conditioning space, and performs heat exchange for cooling and heating in the indoor unit, and then moves to the cooling tower along the cooling water line to cool again by heat exchange with outdoor air. Will be.

The air cooled by the cooling water receives moisture from the cooling water and becomes saturated with steam at high temperature and high humidity. The air is released to the outside of the cooling tower. At this time, the high temperature and high humidity air meets the low temperature of the outside air and condenses moisture in the air. As water drops occur, it produces white lead.

Cooling towers are usually installed in places close to people's living spaces, so they are misunderstood as contaminants in appearance and cause aversion, and are disturbed by fire, and environmental pollution when cooling water is contaminated. In poor condition, it will release harmful substances.

As described above, various attempts have been made to prevent white smoke generated during operation of the cooling tower, and various types of smoke prevention systems have been proposed. During this attempt, many methods have been proposed to prevent the occurrence of white smoke by installing a heat exchanger on the top of the cooling tower to heat the outlet air of a high temperature and high humidity cooling tower before the white smoke is generated.

This method requires a heat source to be supplied to the heat exchanger to heat the saturated cooling tower outlet air. To this end, various methods for supplying a heat source by supplying electricity or waste heat to the heat exchanger side have been proposed.

Among them, in order to reduce the heat source cost, there is a method of reducing white lead using relatively high temperature cooling water itself. For example, by installing a heat exchanger in the upper portion of the cooling tower, by directly connecting the heat exchanger and the heating and cooling equipment, the cooling water heated up through the heat exchange in the cooling and heating equipment is transferred directly to the heat exchanger side without being transferred to the water spraying side.

As a result, the cooling water heated in the air conditioning and heating equipment is transferred to the heat exchanger side, and the high temperature and high humidity saturated air generated during the cooling process is heated up, and then the temperature is lowered by the cooling water sprayed from the water spraying unit. It is circulated to the heating and cooling equipment.

However, since the conventional cooling tower uses only the heat source obtained through heat exchange in the cooling and heating equipment, the cooling water heat exchanged in the cooling and heating equipment is at a low temperature of 36 to 38 ° C. As a result, the cooling water transferred to the heat exchanger can raise the temperature of the air discharged from the cooling tower to a certain temperature, but does not provide a sufficient heat source to reduce the white smoke.

Therefore, in order to increase the white lead reduction effect, the capacity and size of the heat exchanger installed in the upper portion of the cooling tower have to be enlarged, so that the white lead reduction effect is not so high and the installation is difficult and the cost of the heat exchanger itself is increased.

In addition, in order to obtain a sufficient heat source for preventing white smoke from the relatively low temperature cooling water there is a problem in that the size of the pipe connecting the heating and heating equipment and the heat exchanger is increased to increase the installation cost.

The present invention has been made to solve the above problems, to provide a cooling tower that can effectively prevent the generation of white smoke by heating and damping the exhaust discharged to the outside by using a high-temperature cooling water flowing from the air-conditioning equipment to the sprinkling section. have.

In order to solve the above problems, the present invention provides a case in which air flows in and out, and a flow path for cooling water is formed; An air supply port formed at one end of the flow path for introducing outdoor air; An exhaust port formed at the other end of the flow path and configured to discharge indoor air; A heat exchanger provided on the flow path to cool the temperature of the high temperature coolant in the room; A watering unit provided on the flow path and spraying cooling water to the heat exchange unit; A blowing fan provided in the case to suck external air into the flow path; A white smoke prevention coil installed between the heat exchange part and the exhaust port and additionally applying heat to air heat-exchanged in the heat exchange part; And an external air mixing unit provided between the watering unit and the exhaust port to mix external air of the case and air heat-exchanged in the heat exchange unit.

By the above configuration, the generation of white smoke can be effectively prevented by heating and damping the exhaust discharged to the outside by using the high temperature cooling water flowing from the air conditioning and heating equipment to the water spraying unit.

The outside air mixing unit is provided in the case, the duct is mixed with the outside air of the case and the air heat exchanged in the heat exchange unit; And a damper for adjusting an air blowing amount of external air introduced into the duct.

At this time, the duct may be a vent tree duct narrowing. Due to the narrowing flow path of the venturi duct, the air heat pressure in the case is lowered, so that the amount of white smoke discharged to the outside of the cooling tower may be reduced due to the reduction of high temperature steam contacted by the smoke prevention coil.

Here, the blowing fan may be provided between the outside air mixing unit and the air supply port or between the outside air mixing unit and the exhaust port.

In addition, the case may be formed to face the duct to prevent the introduction of a foreign matter (grille) into the duct. By controlling the inflow of external air introduced into the case by the grille, air in the high temperature case and air outside the case may be mixed.

It is provided between the watering unit and the smoke-resistant coil, and further includes an eliminator that collides with the water droplets generated while contacting the coolant injected from the watering unit. Here, the eliminator and the smoke shield may be formed so that one end is inclined toward the other end. At this time, it is provided at one end of the eliminator and provided with a collecting part for collecting the low temperature cooling water generated by the smoke prevention coil, it is possible to reuse the low temperature cooling water in which the temperature of the high temperature cooling water collided with the smoke prevention coil.

In addition, when the hot water generated in the case and the coolant sprayed from the spraying portion is in contact with the control unit for opening the air inlet for introducing the air outside the case further into the case. The case further includes a temperature detector for detecting the outside air temperature of the case or a detector for detecting the humidity of the outside air of the case. By the controller and the detector it is possible to automatically perform the cooling cycle of the cooling tower.

In addition, the heat exchange unit is provided with any one of a filler or a sealed heat transfer tube, and the heat exchange unit may be changed according to conditions. In addition, the sprinkling unit is provided with either a gravity type spraying unit or a pressure spraying unit, but the spraying method of the spraying unit does not limit or limit the present invention.

As described above, according to the present invention, various effects including the following can be expected. However, the present invention does not necessarily achieve the following effects. The generation of white smoke can be effectively prevented by heating and damping the exhaust (saturated humid air) discharged to the outside using high temperature cooling water flowing from the air conditioning and heating equipment to the water spraying unit.

1 is a schematic view showing a cooling tower according to a first embodiment of the present invention.
2 is a schematic view showing a cooling tower according to a second embodiment.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

In the following description of the present invention, a detailed description of known functions and configurations will be omitted so as not to obscure the gist of the present invention.

1 is a schematic view showing a cooling tower according to a first embodiment of the present invention.

Cooling tower 100a according to a preferred embodiment of the present invention drives air conditioning and heating equipment (not shown), and receives hot water from coolant that is circulated along a pipe (not shown) and reused to saturate hot and humid air and external air. Mixing with and lowering the temperature of the hot and humid air is characterized by preventing white smoke.

In addition, the cooling tower 100a used in the present invention is connected to the load 1000 side of the air conditioning equipment and the air conditioning equipment such that the cooling water passes through the air conditioning equipment and lowers the temperature of the high temperature coolant with the elevated temperature while being used for cooling. On the other hand, it serves to prevent the white smoke generated during the cooling process of the high temperature cooling water.

Referring to FIG. 1, the cooling tower 100a includes a case 110a in which air flows in and out, and a flow path through which cooling water moves, formed at one end of the flow path, and at an air supply port 120a for entering outdoor air, and at the other end of the flow path. And a heat exchanger 140a formed on the exhaust port 130a for discharging indoor air and a heat exchanger 140a for cooling the high temperature coolant temperature on the load 1000 side, and provided on the flow path, and providing coolant to the heat exchanger 140a. It is installed between the spraying water spray unit 150a, the blower fan 160a provided in the case 110a to suck external air into the flow path, the heat exchanger 140a and the exhaust port 130a, and in the heat exchanger 140a. It is provided between the smoke-proof coil 180a and the water sprayer 150a and the exhaust port 130a that additionally heat the heat-exchanged air, and mixes the outside air of the case 110a with the air exchanged in the heat exchanger 140a. The unit 190a is included.

The case 110a is formed in a cylindrical or rectangular parallelepiped shape and is formed in the case 110a so that an air supply port 120a for introducing outdoor air and an exhaust port 130a for discharging indoor air in the case 110a are opened. In addition, the case 110a is formed with a flow path through which the coolant moves, and a collecting part 115a is installed at the bottom to collect cooling water falling from the heat exchange part 140a, and then a circulation pump 40 connected to the collecting part 115a. It can be recycled to).

The heat exchanger 140a is installed inside the case 110a to be disposed between the sprayer 150a and the air supply 120a to drop the coolant sprayed from the sprayer 150a, and blower fan 160a. Due to the air flow by), it is possible to cool the heat exchanger (140a).

Here, the heat exchange part may be provided in any one form of the filler type 140b as shown in FIG. 2 or the hermetic heat pipe 140a shown in FIG. 1. In addition, the heat exchanger 140a may be provided in a form directly connected to the air conditioning equipment.

The watering unit 150a is installed to uniformly spray the cooling water on the heat exchanger 140a. Here, the spraying unit 150a may be configured as a pressure spraying unit in which a plurality of spraying nozzles are disposed, or may be configured as a gravity spraying unit in which a plurality of spraying nozzles are disposed in a spraying tank having a predetermined space.

Cooling water flowing into the water spraying part 150a is uniformly sprayed on the heat exchanger 140a. Here, the spraying unit 150a may be configured as a pressure spraying unit in which a plurality of spraying nozzles are disposed, or may be configured as a gravity spraying unit in which a plurality of spraying nozzles are disposed in a spraying tank having a predetermined space.

Therefore, the cooling water transferred from the air conditioning and heating equipment flows into the water spraying unit 150a and is then injected into the heat exchanger 140a through the water spray nozzle, and flows in through the air supply unit 120a while passing downward through the heat exchanger 140a. After the temperature is lowered by the relatively low outside air passing upward through the heat exchanger 140a, the water is dropped into the water collecting unit 115a and collected, and then circulated to the watering unit 150a by the circulation pump 40.

The high temperature coolant circulated to the load 1000 side is cooled in the heat exchanger 140a, and then circulated to the load side by the coolant pump 1100, and the high temperature coolant warmed at the load side is introduced into the smoke prevention coil 180a to be primarily cooled. Thereafter, secondary cooling is performed in the heat exchanger 140a.

The outside air, which has cooled down the cooling water while passing through the heat exchanger 140a, is discharged into the atmosphere through the exhaust port 130a. The outside air is changed into a relatively high temperature and high humidity while undergoing a heat exchange process of the heat exchanger 140a. When the outside air meets a relatively low temperature through the exhaust port 130a, white smoke is generated as the moisture contained in the exhaust condenses.

In order to prevent the occurrence of such white smoke in the case (110a) is provided with a smoke prevention coil (180a) so that the air heat-exchanged with the cooling water through the heat exchanger (140a) can be heated before being discharged to the atmosphere through the exhaust port (130a) do. The white smoke prevention coil 180a lowers the relative humidity of the air by heating the hot and humid air used for the heat exchange to lower the temperature of the cooling water. As a result, white smoke can be prevented from occurring to the outside.

The outside air mixing unit 190a is a region in which the high temperature and high humidity air exchanges with the outside air before the relative humidity of the air falls in the smoke prevention coil 180a. The outside air mixing unit 190a is provided inside the case 110a, and introduced into the duct 192a and the duct 192a where the outside air of the case 110a and the air heat-exchanged in the heat exchanger 140a are mixed. It is composed of a damper (194a) for adjusting the blowing amount of the outside air.

The duct 192a according to the first embodiment of the present invention may be formed as a venturi duct in which the central flow path is narrowed. In this case, the blower fan 160a is disposed between the air mixing unit 190a and the air supply port 120a. Can be provided. That is, when the blowing fan 160a is installed at the inlet side in the duct 192a, the pressure of the flow path is higher than the pressure of the outside air, and when only the duct is formed, the outside air is difficult to easily enter. Therefore, by forming a ventry duct as shown in FIG. 1, the pressure of the site where the duct is formed is reduced, so that outside air is easily introduced.

As described above, when the outdoor air mixing unit 190a is formed of the venturi duct, since the high temperature and high humidity air moving to the anti-smoke smoke 180a is primarily raised by the outside air, the thermal pressure of the air may be reduced. The relative humidity of the air can also be reduced. Therefore, since the relative humidity drops sufficiently while the high temperature and high humidity air passes through the outside air mixing unit 190a and the smoke prevention coil 180a, white smoke may be prevented from occurring outside the cooling tower 100a.

Meanwhile, a grill 112a is formed on the outer wall of the case 110a so as to face the duct 192a to prevent foreign matter from entering the duct 192a. The grill 112a is installed at the inlet or outlet of the duct, and may be formed in a mesh shape or a wing plate shape.

The cooling tower 100a is provided between the spraying part 150a and the smoke prevention coil 180a. The cooling tower 100a is further provided with an eliminator 170a in which water droplets generated while contacting the cooling water sprayed from the spraying part 150a collide with each other. It may include.

At this time, one end of the eliminator (170a) and the smoke-proof coil (180a) may be formed to be inclined in the direction of the other end. That is, as shown in FIG. 1, the eliminator 170a and the smoke prevention coil 180a may be formed to be inclined so that the colliding droplets may flow in an inclined direction.

To this end, the eliminator 170a is provided at one end of the eliminator 170a and includes a water collecting tank 182a for collecting the cooling water generated by the smoke prevention coil 180a. As described above, the eliminator 170a is a region where water droplets generated while contacting the coolant sprayed from the water sprayer 150a collide with each other. Accordingly, water vapor is formed on the surface of the eliminator 170a, and water vapor generated by the water collection tank 182a is collected by the state of the inclined eliminator 170a. The water vapor collected in the water collecting tank 182a moves to the water spraying unit 150a and is sprayed on the heat exchanger 140a, thereby lowering the temperature of the high temperature cooling water.

On the other hand, the cooling tower (100a) according to the first embodiment of the present invention is a control unit for controlling the inlet of the outside air to the outside air mixing unit 190a in order to mix the air heat exchanged in the heat exchanger (140a) and the outside air of the case (110a) 80 may further include.

The controller 80 may control the amount of external air introduced into the duct 192a by controlling the opening and closing degree of the damper 194 formed in the outdoor air mixing unit 190a.

Meanwhile, the cooling tower 100a further includes a temperature detector 81 for detecting a temperature of the outside air and a humidity detector 82 for detecting humidity, and the values detected by the temperature detector 81 and the humidity detector 82 are controlled by the controller. 80 is sent.

When there is a high possibility of generating white smoke from the temperature and humidity values of the outside air, the damper 194 is opened to allow the outside air to flow into the duct 192a. As described above, the outdoor air inlet is introduced on the heat exchanger 140a of the cooling tower 100a to be mixed with the hot air, thereby preventing white smoke.

In addition, the high-temperature air discharged to the outside of the cooling tower 100a is first cooled through the outdoor air mixing unit 190a, and then, through the second cooling through the smoke prevention coil 180a and the eliminator 170a to the outside. Since it is discharged, it is possible to prevent the generation of white smoke to the outside of the cooling tower (100a).

On the other hand, Figure 2 is a schematic diagram showing a cooling tower according to a second embodiment.

Before describing FIG. 2, when the reference numerals of FIG. 2 and the reference numerals of FIG. 1 are the same, the same members are represented, and a detailed description thereof will be omitted for convenience of description.

In the first embodiment, the heat exchanger is formed in a sealed heat transfer tube shape, while in the second embodiment, the heat exchanger is formed in a filler type.

That is, while the high temperature cooling water sprayed from the water spraying unit 150b stays in the filler type heat exchanger 140b, it is cooled by the wind passing through the heat exchanger 140b, and is collected in the water collecting unit 115b. It is supplied to the load side 1000 by the circulation pump 40. After the heat exchange on the load side, it is supplied to the smoke detector coil 180b, cooled in the smoke detector coil 180b, and then flows into the spraying part 150b.

In addition, the cooling tower (100b) according to the second embodiment of the present invention is provided in the case (110b) is provided with an outside air mixing unit (190b) is mixed with the outside air of the case (110b) and the air heat exchanged in the heat exchanger (140b) do.

The outside air mixing unit 190b is a duct 192b in which the outside air of the case 110b and the heat exchanged air in the heat exchanger 140b are mixed, and a damper for adjusting the airflow amount of the outside air introduced into the duct 192b. 194b).

The duct 190b may be formed in various shapes such as a circle and a polygon. Preferably, the duct 190b may be formed in the same shape as that of the case 110b.

Here, the blowing fan 160b may be provided between the outdoor air mixing unit 190b and the exhaust port 130b. Therefore, the boundary between the outside air mixing unit 190b, the internal atmospheric pressure is formed lower than the outside air, the outside air can be easily introduced into the flow path through the duct.

At this time, the eliminator 170b is further provided between the blowing fan 160b and the smoke prevention coil 180b to remove water droplets, thereby further preventing white smoke from occurring.

Here, the smoke prevention coil 180b and the eliminator 170b may be formed to be inclined in a predetermined direction, and the water droplet generated as the smoke prevention coil 180b and the eliminator 170b is formed to be inclined in a predetermined direction. It can be configured to flow in one direction. When the water droplets are configured to flow in one direction as described above, the water droplets are collected and recirculated to the cooling and heating equipment of the cooling tower 100b, thereby improving cooling water utilization of the cooling tower 100b.

As described above, the outside air is introduced on the heat exchanger 140b of the cooling tower 100b to mix the hot air with the outside air mixture 190b, thereby effectively preventing white smoke.

In addition, the hot air discharged to the outside of the cooling tower 100b is first cooled through the outdoor air mixing unit 190b, and then heated through the anti-smoke smoke 180b and the eliminator 170b and then discharged to the outside. Therefore, it is possible to prevent the generation of white smoke to the outside of the cooling tower (100b).

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the invention.

20, 60: valve 40: circulation pump
80: control unit 100a, 100b: cooling tower
110a, 110b: Case 112a, 112b: Grill
115a, 115b: Collection part 120a, 120b: Air supply port
130a, 130b: exhaust port 140a, 140b: heat exchange part
150a, 150b: watering part 160a, 160b: blowing fan
170a, 170b: Smoke whitening coil 180a, 180b eliminator
190a, 190b: air mixing unit 192a, 192b: duct
194a, 194b: damper

Claims (13)

Cases 110a and 110b in which air flows in and out, and flow paths through which cooling water moves are formed;
An air supply port (120a, 120b) formed at one end of the flow path for introducing outdoor air;
An exhaust port (130a, 130b) formed at the other end of the flow path and discharging indoor air;
Heat exchangers (140a, 140b) provided on the flow path to cool the temperature of the high temperature coolant on the load side;
A watering unit 150a and 150b provided on the flow path and spraying cooling water to the heat exchanger unit 140a and 140b;
A blowing fan (160a, 160b) provided in the cases (110a, 110b) to press or suck external air into the flow path;
It is installed between the heat exchanger (140a, 140b) and the exhaust port (130a, 130b), and additionally heat to the heat exchanged air from the heat exchanger (140a, 140b), one end is formed inclined toward the other end direction Coils 180a and 180b; And
The outdoor air mixing unit 190a provided between the sprinkling unit 150a and 150b and the exhaust ports 130a and 130b to mix the outside air of the cases 110a and 110b and the air heat exchanged in the heat exchange units 140a and 140b. , 190b);
Cooling tower comprising a. The method according to claim 1,
The outdoor air mixing unit 190a, 190b,
Ducts (192a, 190b) provided in the cases (110a, 110b), the outside air of the cases (110a, 110b) and the air heat exchanged in the heat exchanger (140a, 140b) is mixed; And
Cooling tower is formed in the center of the flow path further comprises a damper (194a, 194b) for controlling the air flow of the outside air flowing into the duct (192a, 190b). The method according to claim 2,
The duct (192a) is a cooling tower, characterized in that the venturi duct narrowing the central flow path. The method according to claim 3,
The cooling fan (160a, 160b) is a cooling tower, characterized in that provided between the air mixing unit (190a, 190b) and the air supply (120a, 120b). The method according to claim 2,
The cooling fan (160a, 160b) is a cooling tower, characterized in that provided between the air mixing unit (190a, 190b) and the exhaust port (130a, 130b). The method according to claim 2,
The case (110a, 110b),
Cooling tower is formed to face the duct (192a, 190b) is formed (grille) (112a) to prevent foreign matter into the duct (192a, 190b). Claim 1
An eliminator (170a) provided between the watering unit (150a, 150b) and the smoke-resistant coils (180a, 180b), the water droplets generated by contact with the cooling water sprayed from the watering unit (150a, 150b) collide Cooling tower, characterized in that it further comprises. The method of claim 7,
The eliminator (170a, 170b) is a cooling tower, characterized in that one end is formed inclined toward the other end. The method according to claim 8,
The eliminator (170a, 170b),
Cooling towers are provided at one end of the eliminator (170a, 170b), and the water collecting tank (182a, 182b) for collecting the cooling water generated by the smoke-resistant coil (180a, 180b). The method according to claim 8,
Further comprising a control unit 80 for controlling the inflow of external air to the outside air mixing unit (190a, 190b) in order to mix the air exchanged from the heat exchanger (140a, 140b) and the outside air of the case (110a, 110b) Cooling tower, characterized in that. The method according to claim 1,
The cases 110a and 110b are
Cooling tower further comprises a temperature detector for detecting the outside air temperature of the case (110a, 110b) or a humidity detector for detecting the humidity of the outside air of the case (110a, 110b). The method according to claim 1,
The heat exchanger (140a, 140b) is a cooling tower, characterized in that any one of a filler or a sealed heat pipe. The method according to claim 1,
The watering unit (150a, 150b) is a cooling tower, characterized in that any one of the gravity type spraying or pressure spraying.

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