JP2003176988A - Cooling tower white smoke preventing device and preventing method thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To effectively restrain generation of white smoke, reduce a heating cost by meeting with weather conditions, and to effectively use a heating source. <P>SOLUTION: This cooling tower white smoke preventing device is constituted of a cooling tower 1 and a control unit. The cooling tower 1 is provided with a heat exchange part 9, and a blast part 13 for delivering air heated in the heat exchange part 9 to the outside of the cooling tower 1. The control unit is provided with a detector 3 for detecting the white smoke, and a heater 19 for additionally heating the air. A controller 25 is provided so as to output a control signal 26 for controlling heating of the heater 19 based on the detection, of the white smoke. The heating is controlled by detecting the white smoke, and thereby the generation of the white smoke can be surely prevented. Further, the heating is omitted when the white smoke does not exist, and thereby the heating cost can be reduced. It is important to control heating quantity in accordance with a scale of the white smoke. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling tower white smoke prevention device and a method for preventing the same, and particularly to a cooling tower white smoke prevention effectively preventing whitening of water discharged from a wet cooling tower. The present invention relates to a device and a method for preventing the device.

[0002]

2. Description of the Related Art Wet cooling towers generate various white smoke depending on weather conditions such as humidity and temperature of outside air. The huge white smoke is psychologically disliked by the people around it, whether it is harmful or not. White smoke generated due to relative humidity can be extinguished by heating the air stream exiting the top of the cooling tower. Only heating will increase the operation and maintenance costs.

It is required to reduce the heating cost by performing heating in conformity with weather conditions. Furthermore, effective utilization of the heating source is desired.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to provide a cooling tower white smoke preventive device and a preventive method thereof, which can effectively suppress the generation of white smoke in conformity with weather conditions. It is in. Another object of the present invention is to provide a cooling tower white smoke preventive device and a preventive method thereof, which can adapt to the weather conditions and reduce the heating cost. Another object of the present invention is to provide a cooling tower white smoke prevention device that can reduce heating costs in conformity with weather conditions and can effectively utilize a heating source, and a method for preventing the same. is there.

[0005]

Means for solving the problem Means for solving the problem are expressed as follows. The technical matters appearing in the expression are accompanied by parentheses (), and numbers, symbols and the like are added. The numbers, symbols and the like are technical matters constituting at least one embodiment or a plurality of examples of the plurality of embodiments or a plurality of examples of the present invention, particularly, the embodiment or the example. It corresponds to the reference numbers, reference symbols, etc. attached to the technical matters expressed in the drawings corresponding to. Such reference numbers and reference symbols clarify correspondences and bridges between the technical matters described in the claims and the technical matters of the embodiments or examples. Such correspondence / bridge does not mean that the technical matters described in the claims are limited to the technical matters of the embodiment or the examples.

The cooling tower white smoke prevention apparatus according to the present invention comprises a cooling tower (1) and a control unit. The cooling tower (1) is composed of a heat exchange section (9) and a blower section (13) for discharging the air heated in the heat exchange section (9) to the outside of the cooling tower (1). The control unit includes a detector (3) for detecting white smoke, a heater (typically represented by 19, 28 or 28 ', 19) for additionally heating the air, and a heater (19) based on the detection of white smoke. ) And a controller (25) which outputs a control signal (26) for controlling the heating of (1). Since heating is controlled by detecting white smoke,
The white smoke can be surely and swiftly erased. Heating in the absence of white smoke can be omitted and heating costs can be reduced.
By detecting the temperature, humidity, atmospheric pressure of the ambient environment, the temperature, humidity, and pressure of all the air passing through the cooling tower in real time, and calculating and predicting the state of white smoke generation, Although it is theoretically possible to control the heating degree, such control is actually extremely difficult. It is more reliable to prevent white smoke when a person views the white smoke state and manually controls the heating. The cooling tower white smoke prevention apparatus according to the present invention is characterized by automating such a person's judgment. Multiple cameras that replace the eyes of multiple people are used to detect the scale of white smoke. The cooling tower white smoke prevention device according to the present invention cannot completely prevent the white smoke generation by predicting the generation of white smoke, but since the generation of white smoke of a scale smaller than a certain scale is allowed, it will be described later. As described above, it is realistic to set the scale of white smoke and control heating according to the scale. The cooling tower white smoke preventive device according to the present invention is originally that white smoke is harmless, or under the actual condition that it is rendered harmless, in view of being able to reduce the psychological suppression of neighboring residents, Effectively useful.

The cooling tower (1) further includes a damper (22) which can be opened and closed. The heater (19) is provided in the flow path of the control air that is introduced into the cooling tower (1) via the damper (22) and is sucked by the blower unit (13).

The detector (3) detects the scale of white smoke.
The scale detection enables heating based on the scale, the heating cost can be significantly reduced, and the white smoke can be accurately prevented. It is important that the scale is a geometric scale. The white smoke emitted from the cooling tower is harmless by nature, but is disliked by the local residents. From this point of view, the horizontal length is the most important in terms of scale, and the vertical cross-sectional area is next important. Small white smoke often does not have to be erased.

The control signal (26) is output only when the scale is larger than the set scale. This significantly reduces heating costs. As described above, it is preferable that the detector is a plurality of cameras each having an image pickup surface formed by a CCD with coordinates. The stereoscopic scale can be calculated based on the coordinates of the white smoke images of the plurality of CCDs.

It is important that the control unit further comprises an additional heater (28) which additionally heats the air. The detector (3) detects the scale of white smoke, and the controller (25) operates the heater (19) when the scale of white smoke is larger than the first set scale and smaller than the second set scale.
The control signal is output, and when the scale of the white smoke is larger than the second set scale, the controller (25) outputs the first control signal and the second control signal for operating the additional heater (28). By such stepwise heating, the heating cost can be significantly reduced, unnecessary heated air need not be released, and white smoke can be properly prevented. The control unit further comprises an alarm (32). The alarm (32) operates on the basis of a length-alarm volume function which produces an alarm sound which increases in response to an increase in the length of white smoke, the function being provided with hysteresis. The heater or additional heater is controlled as follows. The heater is equipped with a blower (1
3) The first heater (2) arranged on the downstream side (exhaust side) of
8 ') and the second placed upstream of the blower section (13)
It is composed of a heater (19 or 19 '). The first heater (28 ') passes the first fluid of the heat source having the first temperature of the plant to which the cooling tower belongs, and the second heater (19) the second fluid of the heat source having the second temperature of the plant. Fluid is passed through.
The first temperature and the second temperature are different from each other.

In other words, the heater is the first heater (28, 28 ') arranged on the downstream side of the blower section,
A second heater (19) arranged on the upstream side of the blower part, and the first heater (28, 28 ') has a heat source (41') having the first temperature of the plant to which the cooling tower (1) belongs. ) First
A fluid is passed through the second heater (19) and a second fluid of a heat source (41) having a second temperature of the plant is passed through the first heater (19).
The temperature and the second temperature are different from each other. The first temperature is higher than the second temperature and the first fluid is released into the air stream. When it is difficult to reduce the scale of white smoke, the white fluid can be instantaneously prevented by directly discharging the first fluid of the heat source having a higher temperature to the air. In this case, the detection of the white smoke scale is of particular importance. Plants have a wide variety of reusable heat sources, each of which has a different temperature. Appropriately eliminating white smoke in various forms while reusing heat by using at least two types of plant heat sources in response to different types and scales of white smoke based on weather conditions and cooling degree. You can In this case, the detector is
The controller (25) detects the scale of white smoke, and based on the scale of white smoke, the controller (25) supplies the first fluid supplied to the first heater and the second fluid supplied to the second heater. It is especially important to control and.

The cooling tower white smoke prevention method according to the present invention comprises detecting white smoke generated by moisture contained in air discharged from the cooling tower, and heating the air based on the detection. It consists of Detecting the scale of white smoke and increasing / decreasing the heating amount for heating the air corresponding to the scale of white smoke make the prevention of white smoke more effectively useful. Detecting relative humidity and air temperature, dividing cooling tower operation into wet operation and dry / wet operation, and increasing / decreasing heating amount in multiple cases by combining relative humidity and air temperature and wet / dry operation It is more specifically effective. Reusing the heat source of the equipment to which the cooling tower belongs as a heat source for heating the air is meaningful. As a heat source, hot stove gas or gas turbine exhaust gas can be used. Optical detection is particularly effective for detecting the scale of white smoke.

Optical detection is suitable for detecting the scale of white smoke. For optical detection, light or radio waves reflected or absorbed by fine particles of water can be most effectively used. Millimeter-wave band radar with only one source,
A photoelectric sensor that requires elements on the light receiving side and the light emitting side, a TV camera based on luminance, an infrared sensor, and a laser radar are known as effective known means. As the heat source steam, boiler drain or flash steam, SAH steam,
Waste heat discharged from various heat exchange parts such as auxiliary boiler steam is effectively used. As the high temperature air, air discharged from SAH, GT extraction air, and high temperature gas discharged from a hot stove are useful.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Referring to the drawings, an embodiment of a cooling tower white smoke prevention apparatus according to the present invention is
A heat source unit is provided together with the white smoke detection unit. With reference to the cooling tower 1, as shown in FIG.
A thermal cycle unit 2 and a white smoke detection unit 3 that detects white smoke W are provided. A part of the heat cycle unit 2 is originally installed in the cooling tower. The white smoke detection unit 3 is directly supported by the cooling tower 1 or a structure around the cooling tower 1. The cooling tower 1 is often provided as equipment associated with the plant.

As shown in FIG. 2, a plurality of cooling towers 1
Are arranged side by side to form a cooling tower group 4. The center point of the cooling tower group 4 on the horizontal plane is set as the origin P. Four white smoke detection units on one horizontal surface around the cooling tower group 4-
1, 2, 3, 4 are equidistant from the origin P, and
These four units 3-1, 2, 3, 4 are arranged at an interval of 90 degrees around the origin P on the one horizontal plane. The four white smoke detection units 3-1, 2, 3, 4 are separated from the place where the cooling tower 1 is present by about 100 to 200 m, and are separated from the origin P far away.

The four white smoke detection units 3 are arranged on four sides of one square, and the white smoke detection permissible area 5 is set inside the one square. Plane projection has a length of 20
White smoke shorter than m is not considered white smoke. The white smoke detection permissible area 5 is a square area having a side length of 20 m. The number of white smoke detection units 3-1, 2, 3, 4, which is greater than three (including three), can obtain the three-dimensional shape of white smoke by calculation. The four white smoke detection units 3 are
Each is a CCD camera, and the imaging surface of the CCD camera has two-dimensional coordinates, and the three-dimensional shape of white smoke and the origin P are determined based on each of three or more external contour lines of an image having such two-dimensional coordinates. It is possible to calculate the three-dimensional position of the three-dimensional shape on the held three-dimensional coordinates.

As shown in FIG. 1, the cooling tower 1 is composed of a bottom wall 6, a cooling tower main body side wall 7, a top discharge wind tunnel 8 and a heat exchanger 9. The heat exchanger 9 has a large number of heat exchange elements arranged in the inner and outer directions. The heat exchange element is composed of a wet heat exchange element 9-1 and a dry / wet heat exchange element 9-2. The wet heat exchange element 9-1 and the dry and wet heat exchange element 9-2 are partitioned by a partition plate and are alternately arranged in the inner and outer directions.

The water-cooled wet type exchanger element 9-1 is composed of a heat exchanger body and a water sprinkler (not shown) for constantly sprinkling cooling water on the body. Same as the wet exchanger element 9-1 in that the dry-wet heat exchange element 9-2 is composed of a heat exchanger body and a sprinkler (not shown) that constantly sprinkles cooling water on the body. However, an opening / closing valve (not shown) is attached to the water sprinkler, and it is possible to stop the water sprinkling by opening / closing the opening / closing valve. Two
Is used as the dry heat exchange element 9-2. A cooling medium used in the cooling system is circulated in the heat exchanger body in a circulating manner.

The cooling tower body side wall 7 is formed of a large number of swash plates 12 forming an air suction passage 11 for sucking outside air into the internal space thereof. The top exhaust wind tunnel 8
The upper and lower surfaces are open and shaped like a drum. A rotary blade (blower fan) 13 that rotates while sharing the central axis of the top discharge wind tunnel 8 is provided inside the top discharge wind tunnel 8.

The heat cycle unit 2 has a recovery pipe 14 for recovering the cooling water sprinkled in the cooling tower 1. The recovery tube 14 is originally associated with a conventional cooling tower. A pump 15 is additionally provided in the recovery pipe 14 and interposed. The pump 15 is connected to the load 16 via a pipe 17. The load 16 is used as a heat source existing in the plant region where the cooling tower is present, and the waste heat of the load can be effectively used.

The cooling water which has passed through the load 16 and has absorbed the heat from the load 16 becomes hot water, is passed through the hot water supply pipe 18, and is supplied to the air heating pipe group 19. Air heating tube group 19
Is set in a position higher than the heat exchanger 9 and lower than the rotary vanes 13 and is arranged in the heating space 21 forming the internal space of the cooling tower 1. The heating space 21 is generally shielded from the outside world, but is connected to the outside space via air flow rate control dampers 22 arranged at a plurality of places around the heating space 21. An electric motor 23 is coupled to the rotary shaft of the rotary air flow control duct 22. The hot water passing through the air heating pipe group 19 is cooled by air, sprayed from a water sprinkling pipe 19 ′ connected to the air heating pipe group 19 on the discharge side thereof, and is sent to a load 16 by a pump 15 to circulate air heating. It is returned to the tube group 19.

The white smoke detection unit 3 calculates a specified state value defined by the shape, size, etc. of the white smoke W. The white smoke detection unit 3 compares the prescribed state value with the set state value and compares the prescribed state value and the set state value with a plurality of types of state value signals 24.
Is provided with a control value output unit (not shown). The state value signal 24 is input to the control unit 25. The control unit 25 outputs a plurality of control signals 26 based on the state value signal 24. The control signal 26 is used to open / close the air flow rate control damper 22 via the control electric wire 27.
It is input to the electric motor 23 which controls the rotary movement.

When the white smoke W overflows from the white smoke detection permissible area 5 and its length exceeds 20 m, the white smoke detection unit 3
Outputs "001" as the state value signal 24. Based on the state value signal 24, the control unit 25 transmits a control signal 26, which is an opening / closing signal for rotating the electric motor 23 by a certain angle, to the electric motor 23. The air flow rate control damper 2 is generated by the suction force of the rotating blade 13 that normally rotates.
External air flows into the heating space 21 from 2 and the air thus flowing is heated by the air heating tube group 19. The thus-heated white smoke eliminating air passes through the side wall 7 of the cooling tower body, is mixed with the vapor or mist-like fluid generated in the heat exchanger 9, and is discharged from the top discharge wind tunnel 8 to the atmosphere. The white smoke eliminating air prevents the vapor or atomized fluid generated inside the cooling tower 1 from becoming white smoke.

When the scale of white smoke is larger, the white smoke detection unit 3 outputs "002" as the state value signal 24. An electric heater 28 is provided on the downstream side of the top discharge wind tunnel 8. The electric heater 28 is supplied with power from a power supply 29. The state value signal 24, "002", is a control signal that drives the electric motor 23 to rotate as described above and turns on the power supply 29. The electric heater 28 is
It will be used mainly in winter.

FIG. 3 shows the degree of the alarm signal. The alarm signal line 31 is branched from the control electric line 27. The control unit 25 is connected to the alarm device 32 via the alarm signal line 31. Control signals "001", "00"
2 "has an alarm signal portion, and" 001-B "," 00 "
2-B ″. B is represented by an appropriate number of bits. The alarm voltage E corresponding to the number of bits B
Is supplied to the alarm 32. The alarm voltage E has a hysteresis portion 33 that is doubly proportional to the number of bits B. The hysteresis portion 33 has a linear relationship with the length of the white smoke W.

The alarm device 32 linearly changes the alarm reference voltage E1 to the maximum voltage E2 until the length of the white smoke W becomes L1 and becomes longer than the length L1 and becomes the length L2 (> L1). Increase gradually. Corresponding to the magnitude of the voltage,
The hysteresis portion 33 controls the alarm volume linearly.
While the white smoke W is longer than L2, the voltage is the maximum voltage E2.
Maintaining a constant maximum volume is output. When the length of the white smoke W is shortened to L2 and further shorter than L2, the voltage maintains the maximum voltage E2 until the length is shortened to L3 (<L2).

Until the length of the white smoke W becomes shorter than L3 and becomes L4 (<L3), the voltage is the maximum voltage E.
The voltage gradually decreases linearly from 2 to the reference voltage E1. Corresponding to the magnitude of the voltage, the hysteresis portion 33 linearly controls the alarm volume. No alarm is issued while the length is shorter than L4. As the length L1, it is preferable to set the above-mentioned 20 m. The difference between the length L1 and the length L4 is preferably about 2 to 3 m.

Due to such a linear relationship, when the alarm sound is loud corresponding to the scale of the white smoke W and the control by the control unit 25 is out of control, the level of the alarm sound can prompt manual control. . By giving a hysteresis between the length and the loudness of the alarm sound, the length of the white smoke W becomes shorter than the reference length of 20 m and then immediately becomes longer than 20 m, and the on / off is frequently repeated around 20 m. Is suppressed.

FIG. 4 shows six control state cases 1 to 6 under specified operating and weather conditions. Under the climatic conditions where the cooling tower circulating water amount is regulated to a fixed value and the outside air wind speed, wind direction, outside air dry bulb temperature, outside air wet bulb temperature, and outside air relative humidity are specified, the cooling operation mode is non-white smoke prevention − One operation mode is selected from two operation modes: wet (total humidity) and white smoke prevention-dry / wet mixed operation mode. In case 4 in which the temperature is relatively low (normal temperature) and the humidity is normal (constant state), white smoke is not originally generated, so the wet operation is performed. Cases 2 and 3 where the humidity is highest and the temperature is relatively high (normal temperature)
In case 2 of the non-white smoke prevention operation mode by the wet process, white smoke is generated, but if the mode is switched to the white smoke prevention (dry / wet mixing type) operation mode under the same weather condition, such white smoke disappears. . From operation mode of case 5 to case 6
It can be seen that the white smoke disappears even when the operation mode is switched to.

The heating operation mode is added when the weather conditions worsen and the white smoke does not disappear even when the operation mode is switched to the white smoke prevention (dry / wet mixing type) operation mode. By mixing the air introduced through the air flow rate control damper 22 and heated by the air heating tube group 19 with the exhausted moist air, the relative humidity of the gas exhausted from the top discharge wind tunnel 8 decreases, and the top discharge wind tunnel 8 is reduced. There is no white smoke in the air flow coming from. The temperature of the airflow flowing far away from the vicinity of the top exhaust wind tunnel 8 is gradually lowered, but the moisture is dispersed over a wide area, the degree of increase in relative humidity is low, and white smoke is not regenerated. Such heating can dissipate the white smoke found in Case 2 of the non-white smoke prevention-wet mode of operation without changing the mode of operation.
White smoke prevention with addition of heating mode-If white smoke cannot be eliminated even by dry and wet mixed mode operation,
The white smoke can be extinguished by further heating the exhausted moist gas by the electric heater 28.

FIG. 5 shows another embodiment of the cooling tower white smoke prevention apparatus according to the present invention. In the present embodiment,
Hot gas source 4 such as hot air source present in the plant
1 heat is used. Instead of the air heating tube group 19,
The fin tube 42 is used. Heat source pipe 41
An electromagnetic on-off valve 43 is provided between the fin tube 42 and the fin tube 42. The control unit 25 transmits the control signal 26 for opening and closing the electromagnetic on-off valve 42 to the electromagnetic on-off valve 43 through the control electric wire 27. The hot gas inside the hot gas source 41 is supplied to the fin tube 42 through the hot gas supply pipe 44, is discharged to the heating space 21 from the discharge end opening thereof, and is heated together with the air heated by the heat exchanger 9 to the top. It is discharged from the discharge wind tunnel 8. In the present embodiment, the high temperature surplus heat remaining in the plant can be effectively reused. A heat source medium such as steam that propagates the heat of the hot gas source 41 is cooled by the fin tubes 42, passed through the discharge pipe 45, and accumulated in the discharge liquid tank 46.

FIG. 6 shows still another embodiment of the cooling tower white smoke prevention apparatus according to the present invention. In the present embodiment, the heat of the high temperature fluid source 41 ′ existing in the plant is used. As the high temperature fluid source 41 ', gas turbine extraction air,
The heat of higher temperature steam such as boiler AH extraction air or the heat of high temperature exhaust gas of each part of the plant such as gas turbine exhaust gas, boiler exhaust gas, hot stove gas is reused. A heater 28 'is used instead of the electric heater 28. An electromagnetic control valve 47 is provided between the heater 28 'and the high temperature fluid source 41'.
Is installed. The electromagnetic control valve 47 is the control unit 2
It is controlled by the control signal 26 output from the device 5 to open and close.
The point that the sprinkling pipe 19 ′ is used is the same as the above-described embodiment.

FIG. 7 shows a specific example of the above-mentioned heater 28 '. The heater 28 ′ is composed of an annular pipe group or a cylindrical ring 48, and a plurality of radial tubes 49 communicating with the inside of the cylindrical ring 48. The hot gas fluid introduced from the hot fluid source 41 ′ is introduced into the cylindrical ring 48, ejected into the nozzle forming space 51 while flowing through the radial tube 49 toward the center side in the radial direction, Discharge wind tunnel 8
It is mixed with the main stream discharged from the air and effectively and quickly heats the main stream to instantly raise the temperature of the main stream, maintain the high temperature state, and emit white smoke while being released into the atmosphere and diffusing. Never.

[0034]

The cooling tower white smoke preventing apparatus and the method for preventing the same according to the present invention prevent white smoke from being generated immediately by detecting white smoke. The heating cost can be reduced by using waste heat, the heating cost can be further reduced by detecting the scale of white smoke, and there is no adverse effect of exhausting the warmed air unnecessarily. When the scale of white smoke is large, it is possible to uniformly prevent the generation of white smoke throughout the year by positively using a small part of the heat of the plant.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an embodiment of a cooling tower white smoke prevention apparatus according to the present invention.

FIG. 2 is a plan view showing an arrangement of white smoke detectors.

FIG. 3 is a graph showing an alarm signal.

FIG. 4 is a table showing a plurality of driving cases.

FIG. 5 is a cross-sectional view showing another embodiment of the cooling tower white smoke prevention apparatus according to the present invention.

FIG. 6 is a cross-sectional view showing still another embodiment of the cooling tower white smoke prevention apparatus according to the present invention.

FIG. 7 is a cross-sectional view showing a heater.

[Explanation of symbols] 1 ... Cooling tower 3 ... Detector 9 ... Heat exchange section 13 ... Blower 19, 19 '... Heater (second heater) 22 ... Damper 25 ... Controller 26 ... Control signal 28, 28 '... additional heater (first heater) 32 ... Alarm device 41, 41 '... Heat source

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Sadao Minagawa             6-31 Minamikannon 6-3, Nishi-ku, Hiroshima City, Hiroshima Prefecture             Ryosen Engineers Co., Ltd.

Claims (21)

[Claims] 1. A cooling tower, comprising: a control unit, wherein the cooling tower comprises a heat exchange section, and a blower section for discharging the air heated in the heat exchange section to the outside of the cooling tower, The control unit includes a detector that detects white smoke, a heater that additionally heats the air, and a controller that outputs a control signal that controls heating of the heater based on detection of the white smoke. Equipped cooling tower white smoke prevention device. 2. The cooling tower white smoke prevention device according to claim 1, wherein said controller automatically controls heating of said heater based on said control signal. 3. The cooling tower further comprises a damper that can be opened and closed, and the heater is provided in a flow path of air introduced into the cooling tower via the damper and sucked into the blower section. The cooling tower white smoke prevention device according to claim 1 or 2, which is provided. 4. The heat fluid of a heat source belonging to the plant to which the cooling tower is attached is passed through the heater.
Cooling tower white smoke prevention device. 5. The cooling tower white smoke prevention device according to claim 1, wherein the hot fluid is discharged from the heater into the air flow. 6. The cooling tower white smoke prevention device according to claim 2, wherein the detector detects the scale of the white smoke. 7. The cooling tower white smoke preventer of claim 6 wherein said scale includes a horizontal length. 8. The scale further includes a vertical cross-sectional area.
Cooling tower white smoke prevention device. 9. The cooling tower white smoke prevention device according to claim 1, wherein the control signal is output only when the scale is larger than a set scale. 10. The detector has a plurality of imaging planes with coordinates C.
The cooling tower white smoke according to claim 1, wherein the plurality of cameras are respectively formed on the CD, and the scale is calculated based on the coordinates of the white smoke images of the plurality of CCDs. Prevention device. 11. The control unit further comprises an additional heater that additionally heats the air, the detector detects the scale of the white smoke, and the scale of the white smoke is greater than a first set scale. The controller outputs a first control signal for operating the heater when the scale of the white smoke is larger than the second set scale, and the controller adds the additional control signal when the scale of the white smoke is larger than the second set scale. The cooling tower white smoke prevention device according to claim 1, which outputs a second control signal for operating the heater. 12. The control unit further comprises: an alarm, the alarm generating a audible alarm that increases in response to an increase in the length of the white smoke, based on a length-alarm volume function. 2. The cooling tower white smoke prevention device of claim 1, which is operative and wherein said function is provided with hysteresis. 13. The heater comprises a first heater arranged downstream of the air blower and a second heater arranged upstream of the air blower, and the first heater. Of the plant to which the cooling tower belongs
A first fluid of a heat source having a temperature is passed, a second fluid of a heat source having a second temperature of the plant is passed through the second heater, and the first temperature and the second temperature are different from each other. Item 1
Cooling tower white smoke prevention device. 14. The cooling tower white smoke prevention device according to claim 13, wherein the first temperature is higher than the second temperature, and the first fluid is discharged into the air flow. 15. The detector detects the scale of the white smoke, and the controller controls the supply amount of the first fluid to be supplied to the first heater and the supply amount of the first fluid based on the scale of the white smoke. The amount of the second fluid supplied to the second heater is controlled.
3 or 14 cooling tower white smoke prevention device. 16. A method of preventing white smoke from a cooling tower, comprising: detecting white smoke produced by moisture contained in air discharged from the cooling tower; and heating the air based on the detection. . 17. The cooling tower white smoke prevention according to claim 16, further comprising: detecting the scale of the white smoke, and increasing or decreasing a heating amount for heating the air according to the scale of the white smoke. Method. 18. A plurality of methods are provided by detecting relative humidity and air temperature, dividing the operation of the cooling tower into wet operation and dry and wet operation, and combining the relative humidity and air temperature and the wet operation and dry and wet operation. 17. The method for preventing white smoke from a cooling tower according to claim 16, further comprising: increasing or decreasing the heating amount in each case. 19. The method for preventing white smoke from a cooling tower according to claim 16, further comprising reusing a heat source of equipment to which the cooling tower belongs as a heat source for heating the air. 20. The cooling tower white smoke prevention method according to claim 19, wherein combustion gas or combustion exhaust gas is used as the heat source. 21. The cooling tower white smoke prevention method according to claim 1, wherein an optical detection is performed to detect the scale of the white smoke.