KR101562766B1 - vapor plume preventing cooling-tower system capable of using the existing cooling tower structure - Google Patents

vapor plume preventing cooling-tower system capable of using the existing cooling tower structure Download PDF

Info

Publication number
KR101562766B1
KR101562766B1 KR1020150057762A KR20150057762A KR101562766B1 KR 101562766 B1 KR101562766 B1 KR 101562766B1 KR 1020150057762 A KR1020150057762 A KR 1020150057762A KR 20150057762 A KR20150057762 A KR 20150057762A KR 101562766 B1 KR101562766 B1 KR 101562766B1
Authority
KR
South Korea
Prior art keywords
temperature
cooling water
cooling tower
cooling
tower
Prior art date
Application number
KR1020150057762A
Other languages
Korean (ko)
Inventor
이상희
Original Assignee
주식회사 케이프로텍
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 주식회사 케이프로텍 filed Critical 주식회사 케이프로텍
Priority to KR1020150057762A priority Critical patent/KR101562766B1/en
Application granted granted Critical
Publication of KR101562766B1 publication Critical patent/KR101562766B1/en

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28C—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA COME INTO DIRECT CONTACT WITHOUT CHEMICAL INTERACTION
    • F28C1/00—Direct-contact trickle coolers, e.g. cooling towers
    • F28C1/02—Direct-contact trickle coolers, e.g. cooling towers with counter-current only
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28C—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA COME INTO DIRECT CONTACT WITHOUT CHEMICAL INTERACTION
    • F28C1/00—Direct-contact trickle coolers, e.g. cooling towers
    • F28C1/16—Arrangements for preventing condensation, precipitation or mist formation, outside the cooler
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F25/00—Component parts of trickle coolers
    • F28F25/02—Component parts of trickle coolers for distributing, circulating, and accumulating liquid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28C—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA COME INTO DIRECT CONTACT WITHOUT CHEMICAL INTERACTION
    • F28C1/00—Direct-contact trickle coolers, e.g. cooling towers
    • F28C2001/006—Systems comprising cooling towers, e.g. for recooling a cooling medium

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Other Air-Conditioning Systems (AREA)

Abstract

A disclosed cooling tower system comprises: a cooling tower for receiving and cooling coolant whose temperature rises from an external heat exchanger; a coolant supply line for allowing coolant to be supplied from the heat exchanger to the cooling tower; a coolant discharge line for allowing the coolant cooled in the cooling tower to be discharged to the heat exchanger from a water tank of the cooling tower, and forming the coolant supply line and a coolant circulation line; a coolant circulation pump installed in the circulation line for circulating the coolant from the heat exchanger to the cooling tower in operation, and from the cooling tower to the heat exchanger; a bypass line for allowing the coolant from the heat exchanger to bypassing the cooling tower and flowing into the coolant discharge line; a first temperature sensor installed in the coolant discharge line to measure the temperature of the coolant flowing into the heat exchanger; a temperature control valve for adjusting the opening amount based on the temperature of the coolant measured in the first temperature sensor; a temperature control valve for controlling the temperature of the coolant flowing into the heat exchanger by mixing the coolant whose temperature rises through the heat exchanger and the coolant whose temperature is lowered in the cooling tower; and a plume preventing unit for suppressing plume without a change in a structure of the cooling tower through temperature control of the coolant supplied to the cooling tower. Moreover, the plume preventing unit is capable of calculating the target temperature of coolant supplied to a cooling tower according to temperature and humidity of outdoor air, and controlling the temperature of coolant supplied to the cooling tower to be the target temperature or less.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a cooling tower system for preventing white smoke,

The present invention relates to an anti-whitening cooling tower system, and more particularly, to an anti-whitening cooling tower system capable of eliminating the need to install a separate facility for preventing white smoke within a cooling tower structure, To a new type of anti-whitening cooling tower system capable of utilizing a cooling tower structure.

Chemical power plants, etc., and semiconductor or chemical plants require a large amount of cooling water. Since it is difficult to continuously supply high-quality industrial water in large quantities, once the temperature is raised by using the cooling water, Use it again. Such a cooling tower reuses the cooling water by exchanging heat with the outside air to recycle the water whose temperature has risen after being used as cooling water in a refrigerator or a heat exchanger (in particular, an industrial heat exchanger) as cooling water.

In the operation of the cooling tower, the occurrence of white smoke is a problem. The white smoke is generated by the condensation of the water contained in the saturated wet steam in the process of mixing the high temperature saturated wet steam with the low temperature atmosphere after cooling water and evaporative heat exchange in the cooling tower. More specifically, as shown in FIG. 1, when the outside air state point and the cooling tower outlet air state point are straight lines in the humidifier diagram, white smoke is generated as much as the surplus area when passing over the saturation curve to the saturated region. Therefore, as the outside air temperature is lower, the relative humidity is higher, and the outlet temperature of the cooling tower is higher, more white smoke is generated. Even in the winter when the outdoor temperature is low or the outdoor temperature is relatively high, it can be a condition for the occurrence of white smoke in a high relative humidity day.

The above-mentioned white smoke is virtually pure water vapor, which causes problems such as visually impairment due to pollution or smoke due to fire or the like even though it is not harmful to the environment or human body. For this reason, many methods for preventing white smoke have been conventionally proposed. These conventional methods include an induction air heating method for lowering the relative humidity of the air outlet by heating the attracted air, a reheating coil at the air discharge side for lowering the relative humidity A reheat and bypass method, and a cooling water pre-cooling method in which the cooling water first passes through the cooling tower discharging portion to lower the cooling water temperature first.

As shown in FIG. 2, the induction air heating system uses a cooling tower having an upper portion of a heat exchanging device for heating the attracting air with hot water. In the humidifier diagram shown in Fig. 3, white smoke occurs as much as a hatched portion in the case of two points which are the outlet state points directly from the outdoor air state point. However, the attracted air is heated in advance using the heat exchanger, , The air changes from 1 point to 2 points and from 1 point to 3 points. As a whole, the air condition changes from 1 point to 4 points, and the overall air condition change occurs below the saturation curve. So that the white smoke does not occur. The cooling tower which adopts this method can prevent the white smoke but it is impossible to apply the existing cooling tower due to the increase of the total height and installation cost by the addition of the heat exchanger and the efficiency is decreased due to unnecessary devices such as heat exchanger in summer There is a disadvantage that the ratio is increased and the maintenance point is increased.

As shown in FIG. 4 and FIG. 5, when reheating and bypassing are performed from point (1) to point (2) as shown in FIG. 4 and FIG. 5, white smoke occurs as much as the hatched portion. ②) is heated to ② -> ③ using reheat coil, it becomes ① -> ③ as a whole, and it moves under the saturation curve of the humidifier line and does not cause white smoke. The cooling tower adopting such a method can prevent the white smoke, but the total height and installation cost of the reheat coil or the heat exchanger are increased, which makes it impossible to apply the existing cooling tower, There is a disadvantage that the static pressure rises, the operation ratio increases, and the maintenance point also increases.

As shown in FIG. 6 and FIG. 7, when the cooling water pre-cooling system is located at the point (2) immediately from the point (1), which is the outside air state point, white smoke is generated as much as the hatched portion, ) Is reheated using cooling water, the cooling water is reduced in load by pre-cooling, and the relative humidity of the discharged air is lowered to ② -> ③ so that it becomes ① -> ③ overall and moves under the saturation curve of the humidity line No white smoke occurs. Cooling tower cooling cooling tower can prevent white smoke in substantially the same manner as the reheat and bypass system but only the treatment method of cooling water is different. However, the total height and installation cost are increased, and the application of the existing cooling tower In the summer, unnecessary coils increase the static pressure, increase the operating cost, and increase maintenance points.

Korean Patent Publication No. 10-2014-0053048 (2014. 05. 07.)

SUMMARY OF THE INVENTION The object of the present invention is to prevent white smoke by controlling only the temperature of the cooling water supplied to the cooling tower according to the outside temperature and humidity conditions without structural change of the cooling tower itself, A cooling tower system having a cooling tower.

According to an aspect of the present invention, there is provided a cooling tower system capable of suppressing white smoke at the outlet of a cooling tower, wherein the cooling tower system comprises: a cooling tower for receiving cooling water having a temperature raised from an external heat exchanger; A cooling water supply line for allowing the cooling water to be supplied from the heat exchange device to the cooling tower; A cooling water discharge line which permits discharge of cooling water cooled in the cooling tower from the water tank of the cooling tower to the heat exchange apparatus, and constitutes a cooling water circulation line together with the cooling water supply line; A cooling water circulation pump installed in the circulation line for circulating the cooling water from the heat exchange device to the cooling tower and from the cooling tower to the heat exchange device at the time of operation; A bypass line that bypasses the cooling tower to allow cooling water from the heat exchange apparatus to flow to the cooling water discharge line; A first temperature sensor installed in the cooling water discharge line to measure the temperature of the cooling water entering the heat exchange device; The opening amount is adjusted based on the temperature of the cooling water measured by the first temperature sensor so that the temperature of the cooling water entering the heat exchanging device is controlled by mixing the cooling water whose temperature has risen through the heat exchanging device and the cooling water whose temperature has been lowered by the cooling tower Temperature control valve; And a whitening prevention unit for suppressing the whitening of the cooling tower without changing the structure of the cooling tower by controlling the temperature of the cooling water supplied to the cooling tower, wherein the whitening prevention unit comprises: a whitening prevention bypass which connects the water tank of the cooling tower to the cooling water supply line An anti-whitening anti-freeze water pump for activating the anti-whitening bypass pipe to control the temperature of the cooling water supplied to the cooling tower by allowing the cooling water in the water tank of the cooling tower to flow into the cooling water supply line, And a controller for calculating a target temperature of the cooling water supplied to the cooling tower and controlling the cooling water temperature supplied to the cooling tower to the target temperature or lower.

According to one embodiment, the cooling water supply line includes a second temperature sensor for measuring the temperature of the cooling water whose temperature has risen in the heat exchanging apparatus, and a second temperature sensor for controlling the temperature of the cooling water introduced through the bypass pipe, The second temperature sensor is provided at a rear end of the heat exchanging device and the third temperature sensor is provided between the cooling water inflow portion of the cooling tower and the joining point, The water tank is provided with a fourth temperature sensor for measuring the temperature of the cooling water discharged from the water tank. The controller controls the temperature of the outside air and the temperature of the cooling water measured by the second temperature sensor, the third temperature sensor, The temperature and the amount of the cooling water flowing into the cooling water supply line through the bypass pipe are controlled by using the temperature information, The temperature of the cooling water supplied to the cooling tower is controlled to a temperature for preventing white smoke.

According to one embodiment, the controller controls the fan provided in the cooling tower and the anti-whitening cooling water pump for controlling the temperature of the cooling water flowing into the cooling water supply line.

According to one embodiment, the cooling tower system includes a cooling water inducing line for preventing freezing of the cooling water from the front end of the cooling tower in the cooling water supply line to the water tank in the cooling tower, and a temperature control valve for preventing freeze from being installed on the cooling water induction line for preventing freezing .

According to another aspect of the present invention, there is provided a method for controlling the prevention of white smoke in a cooling tower system as described above, the method including the steps of: acquiring outside air temperature and outside air humidity around the cooling tower; Calculating a target temperature to a limit of a temperature capable of suppressing white smoke when the cooling tower is supplied to the cooling tower in an ambient air condition including the obtained outside air temperature and outside air humidity; Comparing the cooling water temperature supplied to the cooling tower with the target temperature; And controlling the temperature of the cooling water supplied to the cooling tower to be lower than the target temperature when it is determined that white smoke occurs when the cooling water temperature supplied to the cooling tower exceeds the target temperature, The temperature and the amount of the cooling water flowing into the cooling water supply line through the bypass pipe are controlled.

Determining whether the atmospheric condition including the outside air temperature and the outside air humidity is a condition in which white smoke occurs, after the step of acquiring the outside air temperature and the outside air humidity around the cooling tower; And activating the anti-whitening unit by activating the anti-whiteout preventing cooling water pump when the outdoor air condition is a condition causing white smoke.

According to another aspect of the present invention, there is provided a method of controlling a cooling tower system, comprising: obtaining an outside air temperature and an outside air humidity around the cooling tower; Calculating a target temperature to a limit of a temperature capable of suppressing white smoke when the cooling tower is supplied to the cooling tower in an ambient air condition including the obtained outside air temperature and outside air humidity; Comparing the cooling water temperature supplied to the cooling tower with the target temperature; And controlling the temperature of the cooling water supplied to the cooling tower to be lower than the target temperature when it is determined that white smoke occurs when the cooling water temperature supplied to the cooling tower exceeds the target temperature, And controlling the temperature of the water in the cooling tower by controlling the fan of the cooling tower when the temperature of the water in the cooling tower is lower than the target temperature and the fan of the cooling tower is off, The temperature control valve for preventing freezing is set so as to increase the temperature of the water tank in the cooling tower by guiding the cooling water from the front end of the cooling tower to the water tank in the cooling tower when the temperature is lower than the worst- .

The cooling tower system according to the present invention is advantageous in that it can prevent white smoke by controlling only the temperature of the cooling water supplied to the cooling tower without structural change of the cooling tower itself, and has excellent anti-whitening performance while utilizing the existing cooling tower structure as it is. In addition, since the cooling tower system according to the present invention does not require unnecessary facilities such as a heating coil in a cooling tower, it is possible to prevent the occurrence of white smoke, especially in the summer, by using unnecessary facilities such as heating coils, Solve the problem of preventing cooling tower. In addition, the cooling tower system according to the present invention has the additional advantage that it has less maintenance points compared to the prior art.

FIG. 1 is a graph for explaining the general principle of the occurrence of white smoke during operation of a cooling tower, using a humidifier diagram.
FIG. 2 is a view showing a prior art cooling tower having a heat exchanging device for heating attracted air with hot water.
FIG. 3 is a schematic diagram of a humidifier for explaining the principle of suppressing the occurrence of white smoke in the conventional cooling tower shown in FIG. 2. FIG.
4 is a view for explaining a conventional cooling tower using a reheat and bypass method for preventing white smoke.
FIG. 5 is a schematic diagram of a humidifier for explaining the principle of suppressing the occurrence of white smoke in the conventional cooling tower shown in FIG. 4. FIG.
6 is a view for explaining a conventional cooling tower using a cooling water pre-cooling method for preventing white smoke.
7 is a view for explaining the principle of suppressing the occurrence of white smoke in the cooling tower shown in Fig.
8 is a view illustrating a cooling tower system capable of preventing white smoke without changing the basic structure of the cooling tower according to the present invention.
FIG. 9 is a graph for explaining the anti-whitening effect of the cooling tower system according to the present invention, using a humidifier diagram.
10 is a flowchart for explaining an embodiment of a control method of a cooling tower system according to the present invention.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings and the description thereof are intended to aid those of ordinary skill in the art in understanding the present invention. Accordingly, the drawings and description are not to be construed as limiting the scope of the invention.

FIG. 9 is a graph for explaining the anti-whitening effect of the cooling tower system according to the present invention with a humidifier diagram, and FIG. 10 is a graph illustrating the control of the cooling tower system according to the present invention ≪ RTI ID = 0.0 > flowchart < / RTI >

Referring to FIG. 8, a cooling tower system according to the present invention includes a cooling tower 100 for receiving high temperature cooling water from a temperature rise in an external heat exchange apparatus 1000, a cooling tower 100 for cooling the cooling tower 100 from the heat exchange apparatus 1000, A circulation line 200 for allowing circulation of cooling water from the cooling tower 100 to the heat exchange apparatus 1000 and cooling water circulating through the circulation line 200 installed in the circulation line 200, And a circulation pump 300 for circulating the cooling water.

The heat exchange apparatus 1000 may be a refrigerator, an air compressor, or a generator. The circulation line 200 includes a cooling water supply line 210 and a cooling water discharge line 220. The cooling water supply line 210 is connected to the cooling water supply line 210 and the cooling water supply line 210, And the cooling water discharge line 220 is cooled by heat exchange with the outside air, and the cooling water collected in the water tank below the cooling tower 100 forms a flow path to the external heat exchanger 1000 again. The cooling water circulation pump 300 may be installed in the cooling water discharge line 220.

The cooling tower system is directly connected to the cooling water discharge line 220 from the cooling water supply line 210 without passing through the cooling tower 100 so that the cooling water from the heat exchange apparatus 1000 can be circulated through the cooling tower 100 And a bypass line 400 that allows the refrigerant to flow to the cooling water discharge line 220 on the upstream side of the heat exchanger 1000 bypassed. The bypass line 400 is provided with a temperature control valve 410. The temperature control valve 410 controls the opening amount of the cooling water to adjust the minimum temperature of the cooling water entering the heat exchange apparatus 1000. [ To this end, a first temperature sensor 500 for measuring a cooling water temperature T1 entering the heat exchange apparatus 1000 at an upstream side of the heat exchange apparatus 1000 is provided, and the first temperature sensor 500 measures The amount of opening of the temperature control valve 410 is controlled based on the coolant temperature. The mixing amount between the low temperature cooling water cooled in the cooling tower 100 and the high temperature cooling water whose temperature has risen through the heat exchanger 1000 is controlled through the opening amount control of the temperature control valve 410, , The minimum temperature of the cooling water entering the heat exchange apparatus 1000 is adjusted.

The first temperature sensor 500 is installed downstream of the junction point with the bypass line 400 and changes the temperature T1 of the cooling water entering the heat exchanger 1000 after being changed under the control of the temperature control valve 410, .

The cooling tower 100 includes a cooling water spraying part 104 disposed on the upper side of the pillars 103 with a filler 103 through which heat is exchanged between cooling water and outdoor air, And a water tank 101 in which cooling water dropped through the filler 103 after being sprayed from the cooling water spraying unit 104 collects is disposed at a lower portion of the outside air inflow portion 102. [ A fan 106 for sucking and discharging outside air is installed on the upper end of the cooling tower 100. An eliminator 105 for preventing scattering of cooling water is provided between the fan 106 and the cooling water spraying unit 104, Is provided. Cooling water whose temperature has risen after being used in the heat exchanging apparatus 1000 is supplied to the cooling tower 100 and is sprayed through the cooling water spraying unit 104 and is dropped from the filler 103 to the water tank 101 after heat exchange with the cool outside air. In the cooling tower 100 described above, a sensor or a pipe is added to the outside of the cooling tower without any structural change in order to prevent white smoke.

In addition, the cooling tower system includes a whitening prevention unit 600 for controlling the temperature supplied to the cooling tower 100 to a temperature lower than the target temperature, which is a temperature limit for preventing white smoke. The anti-whitening unit 600 includes a whitening prevention bypass pipe 610 connecting the water tank 101 of the cooling tower 100 and the cooling water supply line 210 without changing the existing structure of the cooling tower 100. The cooling water that is collected in the water tub 101 in the cooling tower 100 is mixed with the cooling water supplied to the cooling tower 100 by the temperature rise in the heat exchange apparatus 1000 by the white smoke prevention bypass pipe 610 The temperature of the cooling water supplied to the cooling tower 100 can be lowered. The anti-whitening prevention unit 600 activates the anti-whitening bypass pipe 610 to prevent white smoke from flowing into the cooling water supply line 210 from the cooling water in the water tank 101 in the cooling tower 100, And a coolant pump 620. In order to adjust the mixing amount of the low-temperature cooling water through the bypass pipe 610, the pump may be controlled in rotation speed or a valve may be provided in the bypass pipe 610 to adjust the opening amount.

The cooling water supply line 210 is connected to the upstream side of the junction pipe j and the junction point j at which the bypass pipe 610 and the cooling water supply line 210 join, A second temperature sensor 630 for measuring the temperature of the high temperature cooling water whose temperature has risen in the heat exchanging apparatus 1000 is provided between the heat exchanger 1000 and the heat exchanger 1000. Although not shown, the upstream-side cooling water supply line 210 may be provided with a valve whose opening amount is adjusted on the basis of the junction point (j).

The cooling water supply line 210 is connected to the downstream side of the junction point j of the bypass pipe 610 and the cooling water supply line 210, And a third temperature sensor 640 for measuring the temperature of cooling water finally supplied to the cooling tower 100 (that is, supply cooling water) between the junction point j and the junction point j. The temperature of the cooling water finally supplied to the cooling tower 100 through the mixing of the cooling water directly supplied without passing through the external heat exchanger 1000 and the cooling water passing through the heat exchanger 1000 in the water tank 101 of the cooling tower 100 (T3) is adjusted. The temperature T4 discharged from the water tub 101 or through the bypass pipe 610 and / or the cooling water discharge line 220 from the water tub 101 is detected by a fourth temperature sensor 650).

The white smoke prevention unit 600 calculates the target temperature Tt of the cooling water supplied to the cooling tower 100 using the temperature and humidity information of the outside air and supplies the target temperature Tt to the cooling tower 100 And a controller 660 for controlling the actual cooling water temperature to a target temperature Tt or lower. The controller 660 controls the temperature of the cooling water supplied to the cooling tower 100 so that the cooling water temperature T2 downstream of the heat exchanger 1000 measured by the second temperature sensor 630 and the cooling water temperature The temperature of the discharged cooling water T3 from the water tank 101 measured by the sensor 650 and the temperature T3 of the supplied cooling water mixed therewith as information, 101 to regulate the mixing amount of the exhaust cooling water. The temperature T3 means the regulated temperature of the cooling water supplied to the cooling tower 100. This supplied cooling water temperature T3 is compared with the calculated target temperature Tt by the controller 660 and is maintained below the target temperature Tt.

The cooling tower system according to the present embodiment is a constitutional element for preventing the cooling water from being frozen and the flow of cooling water from the front end of the cooling tower 100 in the cooling water supply line 210 to the water tank 101 in the cooling tower 100 A cooling water inducing line 710 for preventing freezing of the frother and a temperature control valve 720 for preventing the freezing of the frozen water from being installed on the cooling water guiding line 710 for preventing freezing.

On the other hand, the above-described controller 660 includes a function of comparing the water tank temperature T4 with the above-described target temperature Tt, and according to the result of comparison between the water bath temperature T4 and the target temperature Tt, To control the water bath temperature T4. The controller 660 determines whether the cooling tower fan 106 is off when the water bath temperature T4 is lower than the target temperature Tt. In addition, the controller 660 includes a function of comparing the function of comparing the water tank temperature T4 with a predetermined frost wave temperature in a state where it is determined that the fan 106 is off. The cooling water supplied to the cooling tower 100 through the cooling water supply line 210 is supplied to the cooling water induction line for preventing freezing (hereinafter, referred to as " cooling water ") through the cooling water supply line 210, The temperature control valve 720 for bypassing the cooling water tank 710 is bypassed to the cooling tower water tank through the cooling pipe 710.

The temperature of the cooling water supplied to the cooling tower 100 is controlled to an optimum temperature that can prevent white smoke according to the temperature and humidity conditions of the outside air. Such a control process is described with reference to Fig. 8 and Fig. 9 The following will be described.

The outside air temperature measured by the outside air temperature sensor is -5 DEG C and the humidity of the outside air measured by the outside air humidity sensor is 40%. The cooling tower discharge temperature of the cooling water measured in the water tank 101 of the cooling tower 100, that is, the cooling water temperature T4 cooled in the cooling tower 100 is 10 占 폚. A portion of the cooling water that has risen to the temperature (T2) from 20 to 25 占 폚 through the heat exchanger 1000 is bypassed by the temperature control valve 410 whose opening amount is controlled in accordance with the upstream and downstream cooling water temperatures of the heat exchanger 1000, The cooling water is introduced into the cooling water discharge line 220 through the line 400 and the temperature T1 is adjusted to 15 to 20 ° C at the front end of the heat exchanger 1000. The cooling water is heat-exchanged in the heat exchanger 1000 and then flows to the cooling tower 100 through the cooling water supply line 210 by 20 to 25 ° C in the heat exchanger 1000. 8, when the temperature of the cooling water supplied to the cooling tower 100 through the cooling water supply line 210 is 20 to 25 DEG C (particularly, 25 DEG C), the state point of the cooling tower outlet side of the outside air is B ' do. At this time, when the state point A and the point B 'of the winter outdoor condition are connected by a straight line, a white smoke occurrence interval exceeding the saturation curve is generated. At this time, the appropriate amount of water in the water tank of the cooling tower 100 at a temperature of 10 占 폚 (limited to a minimum possible temperature of 5 占 폚 to prevent freezing) is passed through the bypass pipe 610 to cool water flowing at 20 to 25 占 폚 The temperature of the cooling water supplied to the cooling tower 100 is controlled to 15 ° C or lower, which is the target temperature Tt determined according to the ambient condition, by controlling the mixing amount of the cooling water of 10 ° C and the cooling water of 20 to 25 ° C, can do. When the temperature and the humidity of the outside air are -5 ° C. and 40% and the temperature of the cooling water supplied to the cooling tower 100 is 15 ° C., the state point on the cooling tower outlet side is shifted from B 'to B, Does not exceed the saturation curve substantially and white smoke may not occur.

Therefore, it is possible to prevent white smoke by supplying cooling water to the cooling tower at an optimum temperature that does not cause white smoke, depending on the temperature and humidity of the outside air. The cooling water supply temperature at which white smoke does not occur, that is, the target temperature Tt, can be obtained in real time by the controller 660 in accordance with the temperature and humidity information of the outside air.

A control method for preventing white smoke in the cooling tower system described above with reference to FIG. 10 will be described below.

Referring to FIG. 10, the white smoke prevention control method of the cooling tower system includes the steps of acquiring outside-air condition information (S1) for acquiring outside-air condition information, and acquiring outside-air condition information (S1) (S3) of activating the anti-whitening unit (600) by activating the anti-whiteout preventing cooling water pump (620) when the outdoor air condition is a condition in which the whiteout occurs, a step (S3) A target temperature calculation step S4 for calculating a target temperature Tt of the cooling water which can prevent white smoke when the cooling water is supplied to the cooling tower in a certain outside air condition in which white smoke may occur, (S5) of determining whether or not the cooling water temperature is equal to or lower than the target temperature Tt when the temperature of the cooling water exceeds the target temperature Tt; The cooling water temperature supplied to the cooling water supply temperature adjustment and a step (S6) of adjusting to be below the target temperature (Tt).

In step S1, the temperature (To) and humidity (RHo) of the outside air measured using the outside air temperature sensor and the outside air humidity sensor are provided to the controller 660 as an electric signal. In addition, the coolant temperature T2 downstream of the heat exchanger 1000 is measured by the second temperature sensor 630 and provided as an electric signal to the supercharger controller 660.

In step S2, the controller 660 determines whether the current condition is a state in which white smoke can occur, using the temperature, humidity (To, RHo) and cooling water temperature (T2) of the outside air obtained. In step S3, in the case where the white smoke occurs, the white smoke prevention water pump 620 is activated to activate the white smoke prevention unit 600. [ In the case where the white smoke does not occur, the operation of the white smoke preventing coolant pump 620 is stopped. In step 4, when the outside air condition is a state where white smoke can occur, the controller calculates a target temperature Tt of cooling water that can prevent white smoke when supplied to the cooling tower in the outside air condition. At this time, measurement of the supply temperature T3 of the actual cooling water supplied to the cooling tower 100 is also performed. The target temperature Tt is calculated according to the humidity chart shown in Fig. In step S5, the temperature T3 of the cooling water finally supplied to the cooling tower 100 is compared with the target temperature Tt. The temperature of the cooling water supplied to the cooling tower 100, that is, the temperature T3 of the cooling water to be supplied is the temperature of the cooling water adjusted by mixing the cooling water downstream of the heat exchanging apparatus 1000 and the water tank cooling water from the cooling tower water tank 101, Is a temperature measured in real time by a third temperature sensor located at the front end of the cooling water inlet of the cooling tower (100). In step S6, when the supplied cooling water temperature T3 exceeds the target temperature Tt, the anti-white smoke cooling water pump 620 and the anti-whitening prevention valves installed in the bypass pipe 610 connecting the cooling tower water tank and the cooling water supply line Thereby controlling the supplied cooling water temperature T3 to be equal to or lower than the target temperature Tt. At this time, the control for the anti-smelt cooling water pump 620 is based on the inverter control.

The control method further includes a step S7 of determining whether the water bath temperature T4 is lower than the target temperature Tt and if the water bath temperature T4 is less than the target temperature Tt, , The cooling tower fan 106 is controlled to control the water bath temperature T4. The control method further includes a step S8 of determining whether the cooling tower fan 106 is off when the water tray temperature T4 is lower than the target temperature Tt and the step S8 of determining whether the cooling tower fan 106 is off, (S9) of judging whether or not the temperature T4 is lower than a predetermined freezing concern temperature. In the step S10, if the water tank temperature T4 is lower than the susceptible temperature even though the cooling tower fan 106 is in the off state, the control method may include a water tank temperature adjustment step S10 for preventing freezing. The temperature control valve 720 is controlled so as to bypass the cooling water supplied to the cooling tower 100 through the supply line 210 to the cooling tower water tank through the cooling water induction line 710 for preventing freezing.

100: Cooling tower 1000: Heat exchanger
200: circulation line 210: cooling water supply line
220: cooling water discharge line 600: cold-rolled prevention unit
610: Bypass piping 620: Anti-white smoke coolant pump
660: Controller

Claims (7)

A cooling tower system capable of suppressing white smoke at the outlet of a cooling tower,
And a cooling water discharging portion disposed on the upper side of the pillar with a filler interposed therebetween, and an outer air inflow portion disposed below the pillar, and a water tank for collecting the cooling water dropped through the filler after being sprayed by the cooling water spraying portion, A cooling tower in which cooling water having a temperature rising from an external heat exchanger is injected from the cooling water spraying part, cooled by outside air in the filler, and then collected in the water tank;
A cooling water supply line for allowing cooling water whose temperature has risen in the heat exchanger to be supplied to the cooling water spray portion of the cooling tower;
A cooling water discharge line which permits discharge of cooling water cooled in the cooling tower from the water tank of the cooling tower to the heat exchange apparatus, and constitutes a cooling water circulation line together with the cooling water supply line;
A cooling water circulation pump installed in the circulation line for circulating the cooling water from the heat exchange device to the cooling tower and from the cooling tower to the heat exchange device at the time of operation;
A bypass line that bypasses the cooling tower to allow cooling water from the heat exchange apparatus to flow to the cooling water discharge line;
A first temperature sensor installed in the cooling water discharge line to measure the temperature of the cooling water entering the heat exchange device;
The amount of opening based on the temperature of the cooling water measured by the first temperature sensor is adjusted so that the temperature of the cooling water entering the heat exchanger is controlled by mixing the cooling water whose temperature has risen through the heat exchanger and the cooling water whose temperature has risen by the cooling tower TCV valves; And
And a white smoke prevention unit for suppressing white smoke without changing the structure of the cooling tower through the temperature control of the cooling water supplied to the cooling water spray unit of the cooling tower,
The anti-whitening unit includes: a whitening prevention bypass pipe connecting the water tank of the cooling tower and the cooling water supply line; and a cooling water supply pipe An anti-white smoke cooling water pump for controlling the temperature of the cooling water supplied to the cooling tower by mixing the cooling water from the cooling tower water tank and the cooling water from the heat exchange apparatus in the cooling water supply line, And a controller for controlling the temperature of the cooling water supplied to the cooling tower to a target temperature or lower, wherein the cooling water supply line includes a second temperature sensor for measuring a temperature of the cooling water whose temperature has risen in the heat exchanger, And a bypass pipe And a third temperature sensor for measuring the temperature of the cooling water finally supplied to the cooling tower after the temperature is controlled by the cooling water, and the second temperature sensor is provided between the junction point where the bypass pipe joins and the heat exchange apparatus The third temperature sensor is provided between the cooling water inflow portion of the cooling tower and the confluence point and a fourth temperature sensor for measuring the temperature of the cooling water discharged from the water tank through the bypass pipe or the cooling water discharge line, Wherein the controller uses temperature information of the cooling water measured by the second temperature sensor, the third temperature sensor, and the fourth temperature sensor to detect the temperature of the cooling water flowing into the cooling water supply line through the bypass pipe And controlling the temperature of the cooling water supplied to the cooling tower to a temperature for preventing white smoke, The controller controls the fan provided in the cooling tower and the anti-whitening anti-cold water pump for controlling the temperature of the cooling water flowing into the cooling water supply line, and controls the cooling water supply line Further comprising a cooling water inducing line for preventing the cooling water from flowing into the cooling water supply line and the water tank in the cooling tower, and a cooling water preventing temperature control valve installed on the cooling water inducing line for preventing freezing. delete delete delete delete delete A control method of a cooling tower system according to claim 1,
Obtaining outdoor air temperature and outdoor air humidity around the cooling tower;
Calculating a target temperature to a limit of a temperature capable of suppressing the white smoke upon supply to the cooling tower in an ambient air condition including the obtained outside air temperature and outside air humidity;
Comparing the cooling water temperature supplied to the cooling tower with the target temperature;
And controlling the temperature of the cooling water supplied to the cooling tower to be lower than the target temperature when it is determined that white smoke occurs when the cooling water temperature supplied to the cooling tower exceeds the target temperature,
When the temperature of the water in the cooling tower is lower than the target temperature and the fan of the cooling tower is off, the temperature of the water in the cooling tower is controlled by controlling the fan of the cooling tower, The temperature of the water tank in the cooling tower is increased by introducing the cooling water from the front end of the cooling tower in the cooling water supply line to the water tank in the cooling tower when the temperature of the water tank is lower than the pre- And the temperature control valve for preventing freezing is controlled.
KR1020150057762A 2015-04-24 2015-04-24 vapor plume preventing cooling-tower system capable of using the existing cooling tower structure KR101562766B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020150057762A KR101562766B1 (en) 2015-04-24 2015-04-24 vapor plume preventing cooling-tower system capable of using the existing cooling tower structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020150057762A KR101562766B1 (en) 2015-04-24 2015-04-24 vapor plume preventing cooling-tower system capable of using the existing cooling tower structure

Publications (1)

Publication Number Publication Date
KR101562766B1 true KR101562766B1 (en) 2015-10-23

Family

ID=54427456

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020150057762A KR101562766B1 (en) 2015-04-24 2015-04-24 vapor plume preventing cooling-tower system capable of using the existing cooling tower structure

Country Status (1)

Country Link
KR (1) KR101562766B1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109163599A (en) * 2018-10-31 2019-01-08 上海大众祥源动力供应有限公司 A kind of cooling tower monitoring system and its application
CN110243206A (en) * 2019-05-19 2019-09-17 南京汇科高分子材料有限公司 For producing the cooling equipment of modified isocyanate
KR102132672B1 (en) 2019-11-19 2020-07-13 (주)풍천엔지니어링 Photoelectric Detection Device of White Smoke
KR102250065B1 (en) * 2020-05-14 2021-05-10 (주)와이엠테크 Operation control method and operation control system of cooling tower capable of saving energy based on variation of air temperature, and cooling tower comprising the same
CN116538830A (en) * 2023-06-27 2023-08-04 山东蓝想环境科技股份有限公司 Defogging cooling tower with cold and hot adjustable air distribution condensation module

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109163599A (en) * 2018-10-31 2019-01-08 上海大众祥源动力供应有限公司 A kind of cooling tower monitoring system and its application
CN110243206A (en) * 2019-05-19 2019-09-17 南京汇科高分子材料有限公司 For producing the cooling equipment of modified isocyanate
KR102132672B1 (en) 2019-11-19 2020-07-13 (주)풍천엔지니어링 Photoelectric Detection Device of White Smoke
KR102250065B1 (en) * 2020-05-14 2021-05-10 (주)와이엠테크 Operation control method and operation control system of cooling tower capable of saving energy based on variation of air temperature, and cooling tower comprising the same
CN116538830A (en) * 2023-06-27 2023-08-04 山东蓝想环境科技股份有限公司 Defogging cooling tower with cold and hot adjustable air distribution condensation module
CN116538830B (en) * 2023-06-27 2023-12-08 山东蓝想环境科技股份有限公司 Defogging cooling tower with cold and hot adjustable air distribution condensation module

Similar Documents

Publication Publication Date Title
KR101562766B1 (en) vapor plume preventing cooling-tower system capable of using the existing cooling tower structure
CN208155595U (en) Engine High aititude simulated test facility
KR101663258B1 (en) plume abatement apparatus of cooling tower and control method thereof
US9739497B2 (en) Humidity control for air conditioning system
JP2008175520A (en) Cooler
CN106440274A (en) Air conditioner anti-freezing protection system and air conditioner
CN107726880A (en) A kind of indirect air cooling system antifreeze control method
CN104791932B (en) Evaporation cooling with automatic control system-mechanical refrigeration joint air-conditioner set
JP5044705B2 (en) Outside air conditioning system
KR101582305B1 (en) Air conditioning system and air conditioning method using the system
JP6906865B2 (en) Air conditioning system
CN104634032B (en) Defrosting speed adjusting method, defrosting speed adjusting device and air conditioner
KR20190142808A (en) Air conditioning system
JPH01107055A (en) Method and device for controlling defrostation of temperature conditioning humidity conditioning facility
CN106996713A (en) A kind of constant temperature cooperative control method of many water cooling towers of multi fan
JP2015218931A (en) Auxiliary cooling device of heat exchanger
JP2009092318A (en) Method and device for energy saving control operation of steam absorptive freezer
CN111471841A (en) High-precision hot air type surface heat treatment control system
CN104377938B (en) A kind of frequency converter cooling system
RU2349841C1 (en) Air conditioning system with combined indirect cooling
CN208859941U (en) With energy-efficient on-line operation detection system
CN209197509U (en) A kind of residual heat reutilizing system avoiding cooling tower coil frost broken
CN103759549B (en) A kind of cooling tower and control method thereof
JP5531246B2 (en) Compressed air dehumidifier
JP2011202823A (en) Bathroom heating and drying device including mist sauna function

Legal Events

Date Code Title Description
AMND Amendment
E601 Decision to refuse application
AMND Amendment
X701 Decision to grant (after re-examination)
GRNT Written decision to grant
FPAY Annual fee payment

Payment date: 20190925

Year of fee payment: 5