Cooling tower operation management method, operation management system, and operation management program

Abstract

To provide a method for managing operation of a cooling tower capable of continuously operating a cooling tower even when there are faults in water supply or sewage systems due to a disaster or the like, and to provide an operation management system and an operation management program.SOLUTION: A method for managing operation of a cooling tower that discharges wastewater to a drainage facility, comprises: when the drainage facility becomes unusable, determining whether or not an emergency water tank can be installed; when the emergency water tank cannot be installed, switching the cooling tower to a non-blow operation; when the emergency water tank can be installed, determining the presence or absence of a water recovery facility; and when the water recovery facility is available, operating it under high load, and when there is no water recovery facility, operating the cooling tower at high concentration.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a method, a system, and a program for operating and managing a cooling tower when a failure occurs in a water supply or sewerage system due to a large-scale disaster or the like.

Background Art

[0002] When a large-scale disaster occurs, there is a high possibility of water supply interruption in the water supply system, and it may take a considerable number of days to restore the water supply. Therefore, in a cooling tower facility that requires a large amount of water, there is a risk that the facility will stop during a water supply interruption, and as a result, the entire system using the cooling tower facility will stop (for example, the stop of a general factory, a power plant, or a data center). There is a need to reduce the risk of the cooling facility stop as much as possible.

[0003] In Japanese Patent No. 6342204, supplying the water stored in the water storage system during a disaster or using a dry cooling tower in Japanese Patent No. 6463908 has been considered. However, also in these documents, a system that enables a smooth transition to an operating state during a disaster in the operation of the cooling tower is not disclosed.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0005] An object of the present invention is to provide a method for operating and managing a cooling tower, an operating and managing system, and a program for operating and managing a cooling tower that can continue the operation of the cooling tower even when a failure occurs in the water supply or sewerage system due to a disaster or the like.

Means for Solving the Problems

[0006] The gist of this invention is as follows:

[0007] [1] A method for operating and managing a cooling tower that discharges wastewater into a drainage system, When the drainage system becomes unusable or is expected to become unusable, a decision will be made on whether or not to install an emergency water tank. If an emergency water tank cannot be installed, the cooling tower will be switched to non-blowout operation. If an emergency water tank can be installed, determine whether or not there is a water recovery system. A method for managing the operation of a cooling tower, which involves operating the water recovery equipment at high load if available, and operating the cooling tower at high concentration if it is not available.

[0008] [2] The cooling tower operation management method of [1], wherein when the water recovery equipment is operating under high load, the operating load of the water recovery equipment is reduced if the water recovery equipment deviates from predetermined operating conditions.

[0009] [3] The cooling tower operation management method of [1], wherein the amount of scale inhibitor added is increased when the water quality conditions of the cooling tower deviate from a predetermined range when the cooling tower is in non-blow operation or when the water recovery equipment is in high-load operation.

[0010] [4] The cooling tower operation management method of [1], wherein when the non-blowout operation is being performed and an increase in the outlet and / or inlet temperature of the LTD and / or the heat exchanger and / or the differential pressure of the cooling water pump is observed, the cooling water pH is adjusted, the amount of scale inhibitor added is increased, or another scale inhibitor is added.

[0011] [5] If an emergency water tank can be installed, the method for operating the cooling tower according to [1], wherein the emergency water tank is installed and the tower is operated, and when the amount of water stored in the emergency water tank reaches the limit, the non-blowout operation is performed.

[0012] [6] If an emergency water tank can be installed, the cooling tower is operated with an emergency water tank installed, and when the amount of water stored in the emergency water tank reaches its limit, an additional emergency water tank is installed or a portion of the water stored in the emergency water tank is removed. [1] A method for operating and managing a cooling tower.

[0013] [7] An operation control device for a cooling tower that discharges wastewater into a drainage system, A means for determining whether or not an emergency water tank can be installed when the drainage facility becomes unusable or is expected to become unusable, In the event that an emergency water tank cannot be installed, a means to switch the cooling tower to non-blowout operation, A means of determining whether or not there is a water recovery facility when an emergency water tank can be installed, If a water recovery facility is available, the water recovery facility will be operated under high load; if not, the cooling tower will be operated under high concentration conditions. A cooling tower operation control device having the following features.

[0014] [8] A cooling tower operation control device having means for reducing the operating load of the water recovery equipment when the water recovery equipment deviates from predetermined operating conditions while the water recovery equipment is operating under high load. [7]

[0015] [9] A cooling tower operation control device having means for increasing the amount of scale inhibitor added when the water quality conditions of the cooling tower deviate from a predetermined range during non-blow operation or high-load operation of the water recovery equipment [7].

[0016]

[10] A cooling tower operation control device [7] having means for adjusting the pH of the cooling water, increasing the amount of scale inhibitor added, or adding another scale inhibitor when an increase in the outlet and / or inlet temperature of the LTD and / or heat exchanger and / or the differential pressure of the cooling water pump is detected while the non-blowout operation is being performed.

[0017]

[11] A cooling tower operation control device [7] having means to install an emergency water tank and operate the tower when the emergency water tank can be installed, and to perform the non-blowout operation when the amount of water stored in the emergency water tank reaches its limit.

[0018]

[12] When the emergency water tank can be installed, the emergency water tank is installed and the operation is carried out. When the water storage volume of the emergency water tank reaches the limit, there is a means to additionally install the emergency water tank or carry out a part of the stored water from the emergency water tank. The operation management device of the cooling tower of [7].

[0019]

[13] An operation management program for a cooling tower that discharges drainage to drainage facilities, When the use of the drainage facility becomes impossible or is predicted to become impossible, a step of determining whether the emergency water tank can be installed; When the emergency water tank cannot be installed, a step of switching the cooling tower to non-blow operation; When the emergency water tank can be installed, a step of determining the presence or absence of a water recovery facility; When there is a water recovery facility, operating the water recovery facility at a high load, and when there is no water recovery facility, operating the cooling tower at a high concentration; An operation management program for a cooling tower that causes a computer to execute the above steps.

[0020]

[14] When the water recovery facility is operating at a high load, when the water recovery facility deviates from predetermined operating conditions, there is a step of reducing the operating load of the water recovery facility. The operation management program of the cooling tower of

[13] .

[0021]

[15] When operating in non-blow operation or when the water recovery facility is operating at a high load, when the water quality conditions of the cooling tower deviate from a predetermined range, there is a step of increasing the addition amount of the scale inhibitor. The operation management program of the cooling tower of

[13] .

[0022]

[16] When operating in non-blow operation, when an increase in LTD and / or the outlet and / or inlet temperature of the heat exchanger and / or the differential pressure of the cooling water pump is confirmed, there is a step of adjusting the pH of the cooling water, increasing the addition amount of the scale inhibitor, or additionally adding another scale inhibitor. The operation management program of the cooling tower of

[13] .

[0023]

[17] An operation management program for a cooling tower of

[13] , which has the step of installing an emergency water tank and operating the tower when the amount of water stored in the emergency water tank reaches its limit, and performing the non-blowout operation when the emergency water tank is available.

[0024]

[18] An operation management program for a cooling tower of

[13] , which, if an emergency water tank can be installed, installs an emergency water tank and operates the tower, and when the amount of water stored in the emergency water tank reaches its limit, installs an additional emergency water tank or removes a portion of the water stored in the emergency water tank.

[0025]

[19] A method for operating and managing a cooling tower that uses water from a water supply facility as makeup water, When the use of part or all of the water supply facility becomes impossible or is expected to become impossible, a determination shall be made as to whether or not there is an alternative water source. If an alternative water source is available, use that alternative water source as at least part of the supplemental water supply. Determine whether the water quality of the alternative water source is within the standard range, and if it is outside the standard range, adjust the operating conditions of the cooling tower. If there are no alternative water sources, switch at least some of the water sources to the backup dunk. Determine whether or not there is a water recovery facility. If a water recovery system is available, operate the water recovery system under high load conditions. If there is no water recovery equipment, the cooling tower will be switched to non-blowout operation or high-concentration operation. Operating and management methods for cooling towers.

[0026]

[20] The operation management method of

[19] , wherein the reserve tank is used and the water recovery equipment is being operated under high load, and the water recovery equipment deviates from predetermined operating conditions, thereby reducing the operating load of the water recovery equipment.

[0027]

[21] The operating management method of

[19] , wherein when the reserve tank is used and the water recovery equipment is operating under high load, the amount of scale inhibitor added is increased when the water quality conditions of the cooling tower deviate from a predetermined range.

[0028]

[22] An operational management method

[19] in which, when the non-blowout operation or high-concentration operation is being performed, an increase in the outlet and / or inlet temperature of the LTD and / or the cooling water pump differential pressure is observed, the pH of the cooling water is adjusted, the amount of scale inhibitor added is increased, or another scale inhibitor is added.

[0029]

[23] An operation control device for a cooling tower that uses water from a water supply facility as makeup water, When the use of part or all of the water supply facility becomes impossible or is expected to become impossible, a determination shall be made as to whether or not there is an alternative water source. Means of using alternative water sources as at least part of the supplemental water supply when alternative water sources are available, A means to determine whether the water quality of the alternative water source is within the standard range, and to adjust the operating conditions of the cooling tower if it is outside the standard range, A means of switching at least some of the water sources to backup dunks when there are no alternative water sources, A means of determining whether or not there is a water recovery facility, If a water recovery system is available, there are means to operate the water recovery system under high load, If there is no water recovery equipment, there are means to switch the cooling tower to non-blowout operation or high-concentration operation. A cooling tower operation control device having the following features.

[0030]

[24] An operation management device of

[23] that has means for reducing the operating load of the water recovery equipment when the water recovery equipment deviates from predetermined operating conditions while the reserve tank is being used and the water recovery equipment is being operated under high load.

[0031]

[25] An operation control device

[23] having means for increasing the amount of scale inhibitor added when the water quality conditions of the cooling tower deviate from a predetermined range while the reserve tank is in use and the water recovery equipment is operating under high load.

[0032]

[26] An operation control device

[23] having means for adjusting the pH of the cooling water, increasing the amount of scale inhibitor added, or adding another scale inhibitor when an increase in the outlet and / or inlet temperature of the LTD and / or heat exchanger and / or the differential pressure of the cooling water pump is detected while the non-blow operation is being performed.

[0033]

[27] A cooling tower operation management program that uses water from a water supply facility as makeup water, When the use of part or all of the water supply facility becomes impossible or is expected to become impossible, the step of determining whether there is an alternative water source, The steps include using alternative water sources as at least part of the supplemental water supply when alternative water sources are available, The steps include determining whether the water quality of the alternative water source is within the standard range, and adjusting the operating conditions of the cooling tower if it is outside the standard range, A step to switch at least some of the water sources to backup dunks if there are no alternative water sources, Steps to determine whether or not there is a water recovery facility, If a water recovery system is available, the water recovery system is operated under high load conditions. A cooling tower operation management program that instructs a computer to execute the steps of switching the cooling tower to non-blowout operation or high-concentration operation when there is no water recovery equipment.

[0034]

[28] An operation management program of

[27] that has a step of reducing the operating load of the equipment when the water recovery equipment deviates from predetermined operating conditions while the reserve tank is being used and the water recovery equipment is being operated under high load.

[0035]

[29] An operation management program of

[27] that includes a step of adding a high concentration of chemical when the water quality conditions of the cooling tower deviate from a predetermined range while the reserve tank is in use and the water recovery equipment is operating under high load.

[0036]

[30] An operation management program of

[27] that, when the non-blowout operation is being performed, if an increase in the outlet and / or inlet temperature of the LTD and / or the heat exchanger and / or the cooling water pump differential pressure is detected, the pH of the cooling water is adjusted, the amount of scale inhibitor added is increased, or another scale inhibitor is added. [Effects of the Invention]

[0037] According to the present invention, even if a disaster or other event causes a disruption to water supply or sewage systems, the cooling tower can continue to operate until the disruption is resolved. [Brief explanation of the drawing]

[0038] [Figure 1] This is a diagram showing the configuration of the cooling tower equipment. [Figure 2] This is a diagram showing the configuration of the cooling tower equipment. [Figure 3] This is a diagram showing the configuration of the cooling tower equipment. [Figure 4] This is a diagram showing the configuration of the cooling tower equipment. [Figure 5] This is a diagram showing the configuration of the cooling tower equipment. [Figure 6] This is a flowchart of the embodiment. [Figure 7] This is a flowchart of the embodiment. [Modes for carrying out the invention]

[0039] The embodiments will be described below with reference to the drawings.

[0040] Figure 1 shows the flow of a cooling tower system to which an embodiment of the present invention is applied.

[0041] Cooling water (recirculated return water) heated by a heat exchanger 12 such as a chiller is sprayed from the water spraying device 2 of the cooling tower 1 onto the packing material 3, where it is cooled by gas-liquid contact with outside air taken in by the drive of a fan 5, and accumulates in the pit, i.e., the lower water tank 4. The cooling water in the lower water tank 4 is circulated to the heat exchanger 12 by a circulation pump 10, a circulation supply pipe 11, and a circulation return pipe 13.

[0042] New water is supplied from the makeup water pipeline 9 in an amount that matches the evaporation rate and droplet dispersion loss in cooling tower 1, as well as the amount of blow-off water from the blow-off valve 8 of blow-off line 7. Regardless of how the evaporation rate and droplet dispersion loss fluctuate, or how blow-off is performed as needed, makeup water is supplied to keep the water level in the lower water tank 4 of the cooling tower constant, and the amount of water in the cooling water system is kept almost constant. This water level control is performed automatically using a ball tap valve 14 or the like. Blow-off is performed as needed when the water quality of the cooling water system deteriorates (for example, when the electrical conductivity increases above a predetermined value).

[0043] The blowdown wastewater is sent to the drainage system.

[0044] A chemical injection device 15 is provided in the water supply pipeline 9 for adding chemicals such as slime inhibitors, scale inhibitors, acids, and alkalis. The chemical injection device is controlled by a chemical injection control device 16.

[0045] [When the use of drainage facilities becomes impossible or is expected to become impossible] If drainage facilities become unusable or are expected to become unusable due to a disaster or other reasons, blowdown wastewater will not be able to be discharged into the drainage facilities.

[0046] Therefore, if the drainage system becomes unusable or is expected to become unusable, a determination is made as shown in step S1 of Figure 6 to determine whether an emergency water tank can be installed (i.e., whether there is space for an emergency water tank and whether an emergency water tank is available).

[0047] <Non-blow operation> If it is determined that an emergency water tank cannot be installed, non-blowout operation is performed (step S2). In non-blowout operation, the cooling tower continues to operate without opening the blowdown valve 8.

[0048] At the start of non-blowout operation, the concentration ratio of the cooling water is low (for example, the electrical conductivity of the cooling water is lower than the specified value), so operation is carried out as under normal conditions. While performing non-blowout operation, the concentration ratio (electrical conductivity) is measured and monitored (step S3).

[0049] If non-blowout operation is continued, the concentration ratio of the cooling water will gradually increase and exceed the specified value. Under normal circumstances, blowout would be performed to reduce the concentration ratio to below the specified value, but since the drainage equipment cannot be used and blowout cannot be performed, the process proceeds to step S4, where the amount of scale inhibitor added is increased to the amount added under normal circumstances, so that scale deposition is prevented even without blowout. There are no particular restrictions on the scale inhibitor that can be used. For example, organic polymers such as polyacrylic acid, copolymers of acrylic acid and vinyl monomers copolymerizable with acrylic acid, polymaleic acid, copolymers of maleic acid or maleic anhydride and vinyl monomers copolymerizable with maleic acid, polyitaconic acid, copolymers of itaconic acid and vinyl monomers copolymerizable with vinyl monomers, phosphorus compounds such as nitrilotrimethylenephosphonic acid, hydroxyethylidenephosphonic acid, phosphonovutanetricarboxylic acid, and sodium hexametaphosphate can be used.

[0050] While continuing this high-concentration operation with a high concentration ratio, the LTD or inlet / outlet water temperature of the heat exchanger 12, the differential pressure of the cooling water pump, etc. are monitored (step S5). If the LTD becomes greater than a predetermined value, the inlet / outlet water temperature becomes higher than a predetermined temperature, or the differential pressure of the pump becomes higher, indicating that the cooling water temperature conditions or the pump condition are not at normal values ​​and that scale deposition is occurring in the chilled water flow path of the heat exchanger 12, the process proceeds to step S6, where acid is added to the makeup water or cooling water to lower the pH of the cooling water to about 6.0 to 7.0 and dissolve the scale. This condition is maintained until the drainage equipment is restored.

[0051] As shown in Figure 6, at the start of non-blowout operation, control is performed that cycles through steps S3 and S7. In step S7, the cooling water temperature conditions such as LTD are determined, similar to step S5, and if they are within normal limits, the process returns to step S3. If the cooling water temperature conditions become abnormal, the process proceeds from step S7 to step S6, where acid is added.

[0052] If the drainage system is restored during the above operation, normal operation will resume.

[0053] [If it is possible to install an emergency water tank] If it is determined in step S1 that an emergency water tank can be installed, the process proceeds to step S10 to determine if a water recovery system (reverse osmosis (RO) system) exists. In cooling tower systems with a water recovery system, even under normal circumstances, blowdown water may be introduced into the water recovery system for RO treatment, the RO permeate may be reused as makeup water, and only the concentrated water may be discharged into the drainage system.

[0054] Furthermore, emergency water tanks should be installed as appropriate before or after step 10, or during any of the subsequent steps.

[0055] <If water recovery equipment is available> When it is determined that a water recovery facility exists as shown in Figure 2, the process proceeds from step 10 to step S11, where a high-load operation is performed to increase the amount of permeate collected in the RO device 21 of the water recovery facility. That is, the water recovery rate in the water recovery facility is increased, reducing the amount of concentrated water, and this concentrated water is discharged into the emergency water tank 22, and this state is maintained. In this state, the differential pressure of the RO device 21 is detected and monitored (step S12).

[0056] When RO unit 21 is operated at high concentration, the differential pressure of the RO membrane gradually increases. If the differential pressure rises and falls outside the standard, either add a scale dispersant or acid to the RO feedwater, or reduce the recovery rate of the RO unit (step S13). Alternatively, instead of monitoring the differential pressure, other indicators that show a decrease in RO membrane performance, such as flow rate or conductivity, may be used for management.

[0057] If the emergency water tank 22 is likely to become full before the drainage system is restored, an additional emergency water tank will be installed, or at least some of the water from the emergency water tank 22 will be removed using a vacuum truck or similar means.

[0058] If these measures cannot be taken, the system will proceed to the aforementioned non-blow operation (step S2).

[0059] <If there is no water recovery equipment> If a water recovery facility is not available (for example, Figure 3), the process proceeds from step S10 to step S14, and the cooling tower equipment is operated in a highly concentrated mode to reduce the amount of blowdown water. That is, the standard value of the concentration ratio (electrical conductivity) that serves as the basis for blowing down the cooling water is increased, and operation continues while monitoring the quality of the cooling water (step S15).

[0060] As this highly concentrated operation continues, the electrical conductivity gradually increases. When the electrical conductivity exceeds a predetermined value, the process proceeds from step S15 to step S16, and the amount of scale inhibitor added is increased.

[0061] In this highly concentrated operation, blowdown water is discharged into the emergency water tank, but because the amount of blowdown water is less than under normal conditions, it can be discharged into the emergency water tank over a long period of time.

[0062] However, if the emergency water tank 22 is likely to become full before the drainage system is restored, an additional emergency water tank will be installed, or at least some of the water from the emergency water tank 22 will be removed using a vacuum truck or similar means.

[0063] If these measures cannot be taken, the system will proceed to the aforementioned non-blow operation (step S2).

[0064] [When the use of water supply or industrial water facilities becomes impossible or is expected to become impossible] If the use of tap water or industrial water facilities becomes impossible or is expected to become impossible, as shown in Figure 7, step S21 is used to determine whether an alternative water source (groundwater, rainwater, river water, or modified seawater) can be used.

[0065] <Operation using alternative water sources> If it is determined that an alternative water source can be used, proceed to step S22 and switch the water source for the supplemental water to the alternative water source. Next, proceed to step S23 to determine whether the water quality of the alternative water source is within the standard range. If the water quality of the alternative water source is within the standard range, use the alternative water source as the supplemental water (Figure 4).

[0066] If the water quality of the alternative water source is outside the standard range, proceed to step S24 and either adjust the concentration ratio of the cooling water or increase the amount of scale inhibitor injected. In this state, wait for the restoration of the drinking water or industrial water facilities.

[0067] <Operation when alternative water sources are unavailable> If an alternative water source is unavailable, proceed from step S21 to step S25, and use the water in the reserve tank 23 as replenishment water, as shown in Figure 5.

[0068] Proceed from step S25 to step S26 to determine whether or not there is a water recovery facility.

[0069] <If water recovery equipment is not available: Non-blow operation using a reserve tank> If it is determined in step 26 that there is no water recovery equipment, the process proceeds to step S27 to determine whether the cooling water quality is outside the standard or within the standard (for example, the electrical conductivity of the cooling water is lower than the specified value). If it is within the standard, the process proceeds to step S28 to perform non-blowout operation. In non-blowout operation, the cooling tower continues to operate without opening the blowdown valve 8.

[0070] While operating without blowdown, the LTD of the heat exchanger 12, the inlet / outlet water temperature, and the differential pressure of the cooling water pump are monitored (step S29). If the LTD of the heat exchanger 12 exceeds a predetermined value, the inlet / outlet water temperature exceeds a predetermined temperature, or the differential pressure of the pump becomes high, indicating that the cooling water temperature conditions or pump condition are not at normal values ​​and that scale deposition is occurring on the heat exchanger 12, the process proceeds to step S32, where acid is added to the makeup water or cooling water to lower the pH of the cooling water to approximately 6.0 to 7.0 and dissolve the scale. This condition is maintained until the water supply or industrial water supply facilities are restored.

[0071] If the cooling water quality is outside the standard in step S27, the process proceeds to step S30, where the amount of scale inhibitor added is increased to a higher amount than the normal amount, so that scale deposition is prevented without blowing.

[0072] While continuing high-concentration operation with a high concentration ratio, the LTD of the heat exchanger 12, the inlet / outlet water temperature, and the differential pressure of the cooling water pump are monitored (step S31). If the LTD of the heat exchanger 12 exceeds a predetermined value, the inlet / outlet water temperature exceeds a predetermined temperature, or the differential pressure of the pump becomes high, indicating that the cooling water temperature conditions or the pump condition are not at normal values ​​and scale deposition is observed on the heat exchanger 12, the process proceeds to step S32, where acid is added to the makeup water or cooling water to lower the pH of the cooling water to approximately 6.0 to 7.0 and dissolve the scale. This condition is maintained until the water supply or industrial water supply facilities are restored.

[0073] If the drainage system is restored during the above operation, normal operation will resume.

[0074] <If water recovery equipment is available: High-load operation of water recovery equipment using a reserve tank> When using the reserve tank 23 and it is determined that a water recovery facility exists as shown in Figure 5, the process proceeds from step 26 to step S33, where a high-load operation is performed to increase the amount of permeate collected in the RO device 21 of the water recovery facility. That is, the water recovery rate in the water recovery facility is increased, and the permeate is sent to the reserve tank 23. In this state, the differential pressure of the RO device 21 is detected and monitored (step S34).

[0075] When the RO system 21 is operated at high concentration, the differential pressure of the RO membrane gradually increases. If the differential pressure falls outside the standard range, either add a scale dispersant or acid to the RO feedwater, or reduce the recovery rate of the RO system (step S35). Alternatively, instead of monitoring the differential pressure, other indicators that show a decrease in RO membrane performance, such as flow rate or conductivity, may be used for management.

[0076] If the water supply or industrial water facilities are restored during the above operation, normal operation will resume. [Explanation of symbols]

[0077] 1 cooling tower 2. Sprinkler system 3 Filling material 4 Lower tank 5 Fans 9 Supply water pipeline 12 Heat exchanger 15 Chemical dosing device 16 Control device 21 RO equipment 22 Emergency water tank 23 Reserve tank

Claims

1. A method for operating and managing a cooling tower that discharges wastewater into a drainage system, When the drainage system becomes unusable or is expected to become unusable, a decision will be made on whether or not to install an emergency water tank. If an emergency water tank cannot be installed, the cooling tower will be switched to non-blowout operation. If an emergency water tank can be installed, determine whether or not there is a water recovery system. A method for managing the operation of a cooling tower, which involves operating the water recovery equipment at high load if available, and operating the cooling tower at high concentration if it is not available.

2. A method for managing the operation of a cooling tower according to claim 1, wherein when the water recovery equipment is operating under high load, the operating load of the water recovery equipment is reduced if the water recovery equipment deviates from predetermined operating conditions.

3. The method for operating a cooling tower according to claim 1, wherein, when the cooling tower is in non-blowout operation, the amount of scale inhibitor added is increased if the water quality conditions of the cooling tower deviate from a predetermined range.

4. The method for operating a cooling tower according to claim 1, wherein the water recovery equipment is equipped with an RO device, and when the water recovery equipment is operating under high load, a scale inhibitor or acid is added when the differential pressure or flow rate of the RO device falls outside the standard range, or when the conductivity, which is an indicator of deterioration in the performance of the RO membrane, deviates from a predetermined range.

5. A method for operating a cooling tower according to claim 1, wherein when the non-blowout operation described above is being performed, an increase in the outlet and / or inlet temperature of the LTD and / or the heat exchanger and / or the differential pressure of the cooling water pump is detected, the pH of the cooling water is adjusted.

6. The method for operating a cooling tower according to claim 1, wherein, if the emergency water tank can be installed, the emergency water tank is installed and the tower is operated, and when the amount of water stored in the emergency water tank reaches its limit, the non-blowout operation is performed.

7. A method for operating and managing a cooling tower according to claim 1, wherein, if an emergency water tank can be installed, an emergency water tank is installed and the tower is operated, and when the amount of water stored in the emergency water tank reaches its limit, an additional emergency water tank is installed or a portion of the water stored in the emergency water tank is removed.

8. A cooling tower operation control device that discharges wastewater into a drainage system, A means for determining whether or not an emergency water tank can be installed when the drainage facility becomes unusable or is expected to become unusable, In the event that an emergency water tank cannot be installed, a means to switch the cooling tower to non-blowout operation, A means of determining whether or not there is a water recovery facility when an emergency water tank can be installed, If a water recovery facility is available, the water recovery facility will be operated under high load; if not, the cooling tower will be operated under high concentration conditions. A cooling tower operation control device having the following features.

9. The cooling tower operation management device according to claim 8, further comprising means for reducing the operating load of the water recovery equipment when the water recovery equipment deviates from predetermined operating conditions while the water recovery equipment is operating under high load.

10. The cooling tower operation management device according to claim 8, further comprising means for increasing the amount of scale inhibitor added when the water quality conditions of the cooling tower deviate from a predetermined range during the aforementioned non-blowout operation.

11. The cooling tower operation management device according to claim 8, wherein the water recovery equipment is equipped with an RO device, and when the water recovery equipment is operating under high load, the device has means for adding a scale inhibitor or acid when the differential pressure or flow rate of the RO device falls outside the standard range, or when the conductivity, which is an indicator of deterioration in the performance of the RO membrane, deviates from a predetermined range.

12. The cooling tower operation management device according to claim 8, further comprising means for adjusting the pH of the cooling water when an increase in the outlet and / or inlet temperature of the LTD and / or the cooling water pump differential pressure is detected while the aforementioned non-blowout operation is being performed.

13. The cooling tower operation management device according to claim 8, which, if the emergency water tank can be installed, has means for installing the emergency water tank and operating the cooling tower, and for performing the non-blowout operation when the amount of water stored in the emergency water tank reaches its limit.

14. The cooling tower operation management device according to claim 8, wherein, if an emergency water tank can be installed, the device operates with an emergency water tank installed, and when the amount of water stored in the emergency water tank reaches its limit, the device has means for installing an additional emergency water tank or for removing a portion of the water stored in the emergency water tank.

15. An operation management program for a cooling tower that discharges wastewater into a drainage system, The steps include determining whether or not to install an emergency water tank when the drainage facility becomes unusable or is expected to become unusable, If an emergency water tank cannot be installed, the step of switching the cooling tower to non-blowout operation, If an emergency water tank can be installed, there is a step to determine whether or not there is a water recovery facility, If a water recovery facility is available, operate the water recovery facility at high load; if not, operate the cooling tower at high concentration. A cooling tower operation management program that is executed by a computer.

16. The cooling tower operation management program according to claim 15, further comprising the step of reducing the operating load of the water recovery equipment when the water recovery equipment deviates from predetermined operating conditions while the water recovery equipment is operating under high load.

17. The cooling tower operation management program according to claim 15, further comprising the step of increasing the amount of scale inhibitor added when the water quality conditions of the cooling tower deviate from a predetermined range during the aforementioned non-blowout operation.

18. The cooling tower operation management program according to claim 15, wherein the water recovery equipment is equipped with an RO device, and the program includes the step of adding a scale inhibitor or acid when the differential pressure or flow rate of the RO device falls outside the standard range, or when the conductivity, which is an indicator of a decrease in the performance of the RO membrane, deviates from a predetermined range, while the water recovery equipment is operating under high load.

19. A cooling tower operation management program according to claim 15, further comprising the step of adjusting the pH of the cooling water when an increase in the outlet and / or inlet temperature of the LTD and / or the cooling water pump differential pressure is detected while the aforementioned non-blowout operation is being performed.

20. The cooling tower operation management program according to claim 15, further comprising the step of installing the emergency water tank and operating the cooling tower when the amount of water stored in the emergency water tank reaches its limit, and performing the non-blowout operation when the emergency water tank reaches its limit.

21. The cooling tower operation management program according to claim 15, further comprising the steps of installing an emergency water tank and operating the tower when such an emergency water tank can be installed, and installing an additional emergency water tank or removing a portion of the water stored in the emergency water tank when the water storage capacity of the emergency water tank reaches its limit.

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