JP2016109454A - Detector and water treatment system including the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a detector capable of precisely detecting slime contamination in a circulation water system.SOLUTION: A detector for detecting slime contamination in a circulation water system includes: a biodegradable dye addition part for adding a biodegradable dye to circulation water; an optical intensity detection part for detecting optical intensity of the circulation water to which the biodegradable dye has been added at predetermined time intervals; and a determination part for determining the slime contamination in the circulation water system on the basis of temporal change of the optical intensity detected by the optical intensity detection part.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a detection device for detecting slime contamination in a circulating water system and a water treatment system including the detection device.

  It is desired to determine slime contamination in a concentrated circulating water system. For example, an adhering matter detection device that detects slime and scale adhering to a pipe in a circulating cooling water system and a wall surface of a heat exchanger has been proposed (see, for example, Patent Document 1).

JP 2010-101840 A

  However, the detection device described in Patent Document 1 has a problem that slime and scale cannot be accurately detected because slime and scale cannot be distinguished and detected.

  An object of this invention is to provide the detection apparatus which can detect the slime contamination of a circulating water system correctly.

  One aspect of the detection apparatus according to the present invention is a detection apparatus for detecting slime contamination in a circulating water system, wherein a biodegradable dye addition unit that adds a biodegradable dye to circulating water and the biodegradable dye are added. A light intensity detector that detects the light intensity of the circulating water at a predetermined time interval, and a determination that determines slime contamination of the circulating water system based on a temporal change in the light intensity detected by the light intensity detector And a section.

  One aspect of the detection device according to the present invention is a detection device for detecting slime contamination in a circulating water system, and a biodegradable pigment addition unit that adds a biodegradable pigment to a circulating water sample collected from the circulating water system, A light intensity detection unit that detects light intensity of the circulating water sample to which the biodegradable dye has been added at a predetermined time interval, and the circulation based on a temporal change in the light intensity detected by the light intensity detection unit. A determination unit for determining water-based slime contamination.

  One aspect of the water treatment system according to the present invention includes: a cooling tower that circulates and cools circulating water supplied to a device to be cooled in a ventilation space by a sprinkling unit and stores the dispersed circulating water in a storage unit; The circulating water is circulated between the cooling tower and the cooled device by supplying the circulating water from the cooling unit to the cooled device and recovering the circulating water from the cooled device to the sprinkling unit. A circulating water line, and a detecting device for detecting slime contamination in a circulating water system including the cooling tower, the cooled device, and the circulating water line, and the detecting device applies a biodegradable pigment to the circulating water. A biodegradable dye addition section to be added, a light intensity detection section for detecting the light intensity of the circulating water to which the biodegradable dye is added at predetermined time intervals, and the light intensity detected by the light intensity detection section On the basis of changes over time Characterized in that it and a determination unit that slime contamination of the circulating water system.

  One aspect of the water treatment system according to the present invention is a method in which circulating water is sprayed and cooled by a sprinkling part to a cooling coil in which cooling water for cooling a device to be cooled flows in a sealed state, and the dispersed circulating water is stored. A cooling tower that is stored in a section, a circulating water line that circulates the circulating water between the storing section and the water sprinkling section, and a detection device that detects slime contamination in a circulating water system including the cooling tower and the circulating water line The detection device includes a biodegradable dye addition unit that adds a biodegradable dye to the circulating water, and the light intensity of the circulating water to which the biodegradable dye is added at a predetermined time interval. A light intensity detection unit for detection, and a determination unit for determining slime contamination of the circulating water system based on a temporal change in the light intensity detected by the light intensity detection unit.

  One aspect of the water treatment system according to the present invention includes a reverse osmosis membrane module that separates supply water into permeate and concentrated water, a supply water line that supplies the supply water to the reverse osmosis membrane module, and permeate water. A permeate line for sending out from the reverse osmosis membrane module, a concentrate line for sending concentrated water from the reverse osmosis membrane module, and a concentration for returning a part of the concentrated water flowing through the concentrate line to the supply water line. A water reflux line; and a detection device that detects slime contamination in a circulating water system including the supply water line, the reverse osmosis membrane module, the concentrated water line, and the concentrated water reflux line, and the detecting device includes the circulating water system. A biodegradable dye addition unit for adding a biodegradable dye to a circulating water sample collected from the sample, and the light intensity of the circulating water sample to which the biodegradable dye is added at predetermined time intervals A light intensity detection unit for output, based on the temporal change of the detected light intensity by the light intensity detection section, characterized in that it and a determination unit that slime contamination of the circulating water system.

  ADVANTAGE OF THE INVENTION According to this invention, the water treatment system which can detect the slime contamination of a circulating water system correctly can be provided.

1 is an overall configuration diagram of a detection device according to a first embodiment of the present invention. It is a figure which shows an example of the slime determination of a detection apparatus. It is a whole block diagram of the modification of the detection apparatus which concerns on 1st Embodiment of this invention. It is a whole block diagram of the water treatment system which concerns on 2nd Embodiment of this invention. It is a whole block diagram of the water treatment system which concerns on 3rd Embodiment of this invention. It is a whole block diagram of the water treatment system which concerns on 4th Embodiment of this invention.

(Background to obtaining the present invention)
In a circulating cooling water system such as a cooling tower, it is necessary to manage the quality of the circulating water in order to prevent damage due to scale generation, corrosion, and slime generation. In order to manage the quality of the circulating water, for example, during the operation of the cooling tower, the concentration factor is adjusted by blowdown of the circulating water, or a water treatment agent is added to the circulating water.

  Since scale generation or corrosion is caused by scale ions or corrosive ions in make-up water, for example, by monitoring the electrical conductivity of make-up water and circulating water, it is possible to adjust the timing of blowdown and the water treatment agent. The input amount can be easily adjusted. On the other hand, the generation of slime is greatly affected by the installation environment of the cooling tower (absorption of microorganisms floating in the atmosphere, irradiation of sunlight, temperature conditions of circulating water, nutrients in makeup water, etc.). Therefore, for slime, it is difficult to regularly monitor the progress of slime contamination, and adjustment of the amount of water treatment agent cannot be easily performed.

  The detection apparatus described in Patent Document 1 detects the measured temperature of the temperature measuring element by energizing the heating element of the probe disposed in water in a pulsed manner. The detection device of Patent Document 1 determines the occurrence state of slime by determining the amount of slime attached to the probe based on the detected temperature result. However, in the detection device of Patent Document 1, since the scale adheres to the probe in addition to the slime, slime contamination cannot be accurately detected.

  Therefore, the present inventors have found a configuration that detects slime contamination in a circulating water system using a biodegradable pigment that is decomposed by microorganisms that cause slime formation.

  Hereinafter, a detection apparatus according to an embodiment of the present invention will be described.

(First embodiment)
A detection apparatus according to a first embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is an overall configuration diagram of a detection apparatus 10a according to the first embodiment of the present invention. As shown in FIG. 1, the detection apparatus 10a includes a biodegradable dye addition unit 1 that adds a biodegradable dye, a light intensity detection unit 2 that detects the light intensity of the circulating water W1, and a determination that determines slime contamination. Part 3. The detection device 10a is connected to a circulating water line L1 through which the circulating water W1 circulates. The “line” in the present specification is a general term for lines capable of flowing a fluid such as a flow path, a radial path, and a pipeline.

  The biodegradable dye addition unit 1 is an apparatus for adding a biodegradable dye to the circulating water W1. The biodegradable pigment addition unit 1 includes a storage unit that stores the biodegradable pigment, and an addition unit that adds the biodegradable pigment from the storage unit to the circulating water W1. The addition unit has a control valve for adjusting the addition amount of the biodegradable pigment. In 1st Embodiment, the biodegradable pigment | dye addition part 1 is connected with the circulating water line L1 through which the circulating water W1 distribute | circulates. The biodegradable dye addition unit 1 adds a biodegradable dye to the circulating water W1 flowing through the circulating water line L1.

  The biodegradable pigment refers to a pigment that is degraded by microorganisms (for example, bacteria or fungi) that cause slime formation. In the first embodiment, the biodegradable dye is a biodegradable fluorescent dye. Examples of the biodegradable fluorescent dye include uranin (Floressen Na) or rhodamine WT. In the present specification, unless otherwise specified, a biodegradable dye means a biodegradable fluorescent dye.

  The light intensity detection unit 2 is a device that detects the light intensity of the circulating water W1 to which the biodegradable pigment is added at predetermined time intervals. The predetermined time interval is a time interval sufficient for the biodegradable pigment to be decomposed by the microorganism when the microorganism contained in the circulating water W1 is present, for example, an interval of 24 to 48 hours. In the first embodiment, the light intensity detector 2 detects the fluorescence intensity as the light intensity of the circulating water W1. The light intensity detection unit 2 includes a circulating water sample line Ls, a measurement cell 21, a light emitting unit 22, a detection unit 23, a stirring unit 24, and a control unit 25.

  The circulating water sample line Ls is a line for introducing the circulating water sample Ws collected from the circulating water line L1 into the measurement cell 21. The circulating water sample line Ls includes a control valve. The control valve performs an opening / closing operation by being controlled by the control unit 25. The circulating water sample line Ls introduces the circulating water sample Ws from the circulating water line L1 into the measurement cell 21 by opening and closing the control valve.

  The measurement cell 21 is a container that accommodates the circulating water sample Ws collected from the circulating water line L1. The measurement cell 21 includes a light transmission window on its side wall. A transparent plate material is fitted into the light transmission window. Further, the measurement cell 21 includes a circulating water sample drain line (not shown) for draining the circulating water sample Ws accommodated therein to the outside.

  The light emitting unit 22 is for irradiating light toward the light transmission window of the measurement cell 21. In the first embodiment, the light emitting unit 22 excites the biodegradable dye (biodegradable fluorescent dye) contained in the circulating water sample Ws accommodated in the measurement cell 21, and thus the light transmission window of the measurement cell 21. Irradiating excitation light toward The light emitting unit 22 includes a light emitting element such as an ultraviolet LED (UV-LED). Turning on / off the light emitting unit 22 is controlled by the control unit 25.

  The detection unit 23 is for detecting the light intensity transmitted through the light transmission window of the measurement cell 21. The detection of the light intensity by the detection unit 23 is performed in response to a signal from the control unit 25. In the first embodiment, the detection unit 23 detects the fluorescence intensity of the biodegradable dye contained in the circulating water sample Ws.

  The stirring unit 24 is for stirring the circulating water sample Ws accommodated in the measurement cell 21. The stirring unit 24 includes a fan that is rotatably disposed at the bottom of the measurement cell 21. The circulating water sample Ws accommodated in the measurement cell 21 is uniformly mixed with the biodegradable pigment as the fan rotates. The rotation of the fan of the stirring unit 24 is controlled by the control unit 25.

  The control unit 25 is a device that controls the operation of the light intensity detection unit 2. The control unit 25 is electrically connected to the light emitting unit 22 and the detection unit 23. The control unit 25 controls turning on / off of the light emitting unit 22. The controller 25 stores light intensity data of the circulating water sample Ws detected by the detector 23. The control unit 25 controls the rotation operation of the fan in the stirring unit 24.

  The determination unit 3 is a device that determines slime contamination in the circulatory system based on the temporal change of the light intensity detected by the light intensity detection unit 2. The determination of slime contamination of the determination unit 3 in the first embodiment will be described with reference to FIG. FIG. 2 is a diagram illustrating an example of determination of slime contamination of the determination unit 3. The determination unit 3 has a reference value Ra of fluorescence intensity. As shown in FIG. 2, the determination unit 3 monitors the change over time of the fluorescence intensity detected by the light intensity detection unit 2, and when the fluorescence intensity becomes less than the reference value Ra, the slime contamination of the circulating water system proceeds. It is determined that

  More specifically, the fluorescence intensity detected by the light intensity detector 2 is proportional to the amount of the biodegradable pigment contained in the circulating water W1. Therefore, when many microorganisms that cause slime formation are present in the circulating water W1, the biodegradable pigment in the circulating water W1 is decomposed by the microorganisms. When the biodegradable pigment in the circulating water W1 is decomposed and reduced by microorganisms, the fluorescence intensity detected by the light intensity detection unit 2 decreases. Therefore, the determination unit 3 determines the progress of slime contamination in the circulating water system based on the decrease in the fluorescence intensity accompanying the decrease in the biodegradable pigment in the circulating water W1.

  Next, operation | movement of the detection apparatus 10a of 1st Embodiment is demonstrated.

  In the biodegradable pigment addition unit 1, the biodegradable pigment is added to the circulating water W1 flowing through the circulating water line L1 from the storage unit by opening the control valve of the addition unit.

  In the light intensity detection unit 2, the control unit 25 controls to open a control valve provided in the circulating water sample line Ls, and introduces the circulating water sample Ws from the circulating water line L 1 into the measurement cell 21. When the circulating water sample Ws is accommodated in the measurement cell 21, the control unit 25 performs control so that the control valve is closed. The control unit 25 rotates the fan of the stirring unit 24 to stir the circulating water sample Ws accommodated in the measurement cell 21.

  The control unit 25 controls the light emitting unit 22 to irradiate excitation light toward the light transmission window of the measurement cell 21. The excitation light irradiated from the light emitting unit 22 passes through the light transmission window of the measurement cell 21 and is irradiated to the circulating water sample Ws accommodated in the measurement cell 21. In the circulating water sample Ws of the portion irradiated with the excitation light, the biodegradable dye is excited and emits fluorescence.

  The control unit 25 controls the detection unit 23 to detect the fluorescence intensity of the biodegradable dye contained in the circulating water sample Ws. The fluorescence intensity data detected by the detection unit 23 is sent to the control unit 25 and stored therein.

  After the fluorescence intensity of the circulating water sample Ws is detected by the detection unit 23, the circulating water sample Ws accommodated in the measurement cell 21 is drained to the outside of the measurement cell 21 through the circulating water sample drain line.

  The control unit 25 performs the above-described series of fluorescence intensity detection operations (introduction of the circulating water sample Ws, detection of light intensity, drainage of the circulating water sample Ws) at time intervals of 24 to 48 hours, and the circulating water sample Ws. Data on the fluorescence intensity over time is acquired.

  The control unit 25 transmits data on the temporal change in the fluorescence intensity of the circulating water sample Ws to the determination unit 3. As shown in FIG. 2, the determination unit 3 monitors the change in fluorescence intensity with time, and determines that the slime contamination of the circulatory system is progressing when the value of the fluorescence intensity is less than a predetermined reference value Ra. To do.

  According to the detection device 10a according to the first embodiment, for example, the following effects can be obtained.

  In the detection apparatus 10a according to the first embodiment, a biodegradable dye is added to the circulating water W1, and slime contamination of the circulating water system is detected based on a change over time in the fluorescence intensity of the circulating water W1 to which the biodegradable dye is added. Judgment. Since the biodegradable dye has the property of being decomposed by microorganisms that cause slime, the detection apparatus 10a causes slime based on the decrease in the fluorescence intensity of the circulating water W1 to which the biodegradable dye is added. Microbial growth can be detected. Therefore, the detection device 10a can accurately and easily detect slime contamination in the circulating water system, distinguishing it from the scale. Moreover, since the detection apparatus 10a detects the fluorescence intensity at predetermined time intervals, the slime contamination of the circulating water W2 can be monitored periodically.

  In 1st Embodiment, although the biodegradable pigment | dye addition part 1 demonstrated the structure which adds a biodegradable pigment | dye to the circulating water W1 which flows through the circulating water line L1, it is not limited to this. For example, the biodegradable dye addition unit 1 may be configured to add a biodegradable dye into the measurement cell 21 of the light intensity detection unit 2 as shown in FIG. In the detection apparatus 10b shown in FIG. 3, since it is only necessary to add a biodegradable dye when detecting the fluorescence intensity, the amount of the biodegradable dye added can be saved.

  In the first embodiment, the biodegradable dye has been described as an example of a biodegradable fluorescent dye, but is not limited thereto. The biodegradable dye may be a dye that is decomposed by a microorganism, and may be a biodegradable non-fluorescent dye. The biodegradable non-fluorescent dye may be, for example, edible natural pigments such as gardenia yellow, safflower red, cochineal, lac, cacao. When a biodegradable non-fluorescent dye is used, the light intensity detection unit 2 detects the transmitted light intensity as the light intensity. In this case, the light emitting unit 22 uses, for example, a light emitting element such as an LED having an emission wavelength that is in a complementary color relationship with the coloration of the non-fluorescent dye.

  In the first embodiment, the determination unit 3 determines that slime contamination of the circulating water system is in progress when the value of the fluorescence intensity is less than the reference value Ra (see FIG. 2). It is not limited. For example, the determination unit 3 determines that slime contamination of the circulating water system is progressing when the decrease rate of the fluorescence intensity, the difference with respect to the initial value of the fluorescence intensity, or the temporal change rate of the fluorescence intensity exceeds the reference value. May be.

  In 1st Embodiment, the determination part 3 may be provided with the alarm means to notify an alarm, when it determines with slime contamination progressing. The user can easily know that the slime contamination of the circulating water system is progressing by the alarm means.

  In the first embodiment, the circulating water sample Ws whose fluorescence intensity has been detected has been described as being drained to the outside through the circulating water sample drainage line, but is not limited thereto. For example, the circulating water sample Ws whose fluorescence intensity has been detected may be returned to the circulating water line L1.

(Second Embodiment)
A water treatment system according to a second embodiment of the present invention will be described with reference to FIG. FIG. 4 is an overall configuration diagram of a water treatment system 100A according to the second embodiment. A water treatment system 100 </ b> A according to the second embodiment is an example in which the detection device 10 according to the first embodiment is applied to a circulating water system including an open cooling tower 5.

  As shown in FIG. 4, the water treatment system 100 </ b> A includes an open-type cooling tower 5, a circulating water line L <b> 2, a detection device 10, and an inhibitor addition device 6. In the second embodiment, the same or equivalent components as those in the first embodiment will be described with the same reference numerals. In the second embodiment, descriptions overlapping with those in the first embodiment are omitted.

  The open-type cooling tower 5 is a device that cools the circulating water W <b> 2 supplied to the device to be cooled 4. The cooling tower 5 includes a main body 51, a sprinkler 52, a reservoir 53, a drain line L3, and a makeup water line L4. The cooled device 4 is, for example, a heat exchanger represented by an air conditioner or a refrigerator.

  The main body 51 forms an outline of the cooling tower 5. An opening is provided in the upper part of the main body 51. A fan driven by a motor is provided in the opening. The outer wall of the main body 51 is provided with ventilation holes for allowing outside air (air) to flow into the cooling tower 5. Inside the main body 51, when the fan is driven, air in the main body 51 is discharged to the outside, and a ventilation space into which new air flows from the ventilation holes is formed. Further, a sprinkler 52 and a reservoir 53 are provided inside the main body 51.

  The water sprinkling part 52 cools the circulating water W2 by spraying the circulating water W2 in the ventilation space of the main body part 51. The watering part 52 is provided in the upper part of the main-body part 51, and is connected with the circulating water line L2.

  The reservoir 53 is a tank that stores the circulating water W2 sprayed from the sprinkler 52. The storage part 53 is provided in the lower part of the main body part 51. A circulating water line L2, a drainage line L3, and a makeup water line L4 are connected to the storage unit 53.

  The drainage line L3 is a line for draining the drainage W3 to the outside of the cooling tower 5. The drain line L3 is connected to the storage unit 53. The drainage line L3 includes a drainage valve 11 that adjusts the drainage flow rate of the drainage W3. The drain valve 11 is opened / closed according to the electrical conductivity of the circulating water W2 measured by, for example, an electrical conductivity measuring unit (not shown) provided in the circulating water line L2. That is, the drainage flow rate of the drainage W3 is determined according to the electrical conductivity of the circulating water W2. In the second embodiment, the drainage W3 refers to, for example, the circulating water W2 having an increased concentration factor.

  The makeup water line L4 is a line for replenishing the makeup water W4. The makeup water line L4 replenishes the reservoir 53 with makeup water W4. The makeup water line L4 includes a pump P1, a makeup valve 12, and a flow rate measuring unit 7. The pump P1 is a pump that pumps the makeup water W4 to the reservoir 53 via the makeup water line L4. The supply valve 12 is a valve that adjusts the flow rate of the supply water W4. The flow rate measuring unit 7 is a device that measures the flow rate of the makeup water W4. The flow rate measurement unit 7 is electrically connected to the biodegradable dye addition unit 1 and the inhibitor addition device 6. The flow rate measurement unit 7 transmits the flow rate measurement result to the biodegradable dye addition unit 1 and the inhibitor addition device 6. In the second embodiment, the flow rate measurement unit 7 uses, for example, a pulse flow meter. The replenishment flow rate of the makeup water W4 is determined by the sum of the evaporation loss amount, the scattering loss amount, and the blow loss amount of the circulating water W2.

  The circulating water line L2 is a line that circulates the circulating water W2 between the cooled device 4 and the cooling tower 5. The circulating water line L2 supplies the circulating water W2 from the storage unit 53 of the cooling tower 5 to the cooled device 4 and collects the circulating water W2 from the cooled device 4 to the watering unit 52 of the cooling tower 5. The circulating water line L2 includes a pump P2. The pump P <b> 2 is a pump that pumps the circulating water W <b> 2 from the storage unit 53 to the water spray unit 52.

  The circulating water line L2 includes an electrical conductivity measuring unit (not shown). The electrical conductivity measuring unit measures the electrical conductivity of the circulating water W2. The electrical conductivity of the circulating water W2 measured by the electrical conductivity measuring unit is used to determine the blowdown start timing and end timing.

  The detection device 10 is a device that detects slime contamination in the circulating water system including the cooled device 4 and the circulating water line L2. The detection device 10 according to the second embodiment uses the detection device 10a according to the first embodiment. The detection device 10 is connected to the circulating water line L2, and detects the light intensity of the circulating water W2 at a predetermined time interval (for example, 24 to 48 hour intervals).

  The biodegradable dye addition unit 1 of the detection device 10 is electrically connected to the flow rate measurement unit 7. The biodegradable dye addition unit 1 adds biodegradable dye in an amount proportional to the flow rate of the makeup water W4 measured by the flow rate measurement unit 7 to the circulating water W2. Specifically, the biodegradable dye addition unit 1 adds an amount of biodegradable dye proportional to the pulse of the flow rate measurement unit (pulse flow meter) 7 to the circulating water W2 flowing through the circulating water line L2.

  In the second embodiment, as the biodegradable pigment, for example, a biodegradable pigment that does not easily decompose (photodecompose) by direct sunlight is used in order to suppress a decrease in the circulating water system due to a cause other than the degradation by microorganisms.

  The determination unit 3 of the detection device 10 is electrically connected to the inhibitor addition device 6. The determination unit 3 transmits an external signal to the inhibitor addition device 6 when it is determined that the slime contamination of the circulation system is progressing.

  The inhibitor addition device 6 is a device that adds an inhibitor that suppresses the generation of slime to the circulating water W2. The inhibitor addition device 6 includes an inhibitor storage unit that stores the slime inhibitor, and an inhibitor addition unit that adds the slime inhibitor from the inhibitor storage unit to the storage unit 53 of the cooling tower 5. The inhibitor addition part has a chemical injection pump P3 that adjusts the amount of slime inhibitor added. The chemical injection pump P <b> 3 injects an amount of slime inhibitor proportional to the flow rate of the makeup water W <b> 4 measured by the flow rate measuring unit 7 from the inhibitor storage unit to the storage unit 53 of the cooling tower 5. Specifically, the chemical injection pump P3 injects an amount of slime inhibitor proportional to the pulse of the flow rate measuring unit (pulse flow meter) 7.

  The inhibitor addition device 6 is electrically connected to the determination unit 3 of the detection device 10. When the inhibitor addition device 6 receives the external signal from the determination unit 3, the chemical injection pump P3 increases the addition amount of the slime inhibitor at a predetermined rate (for example, about 5%).

  Next, the operation of the water treatment system 100A of the second embodiment will be described. In addition, about the detection of slime contamination of the detection apparatus 10, since it is the same as 1st Embodiment, description is abbreviate | omitted.

  In the water treatment system 100A, the circulating water W2 circulates between the cooling tower 5 and the apparatus to be cooled 4 via the circulating water line L2. Specifically, the circulating water W2 is cooled by the cooling tower 5 and then supplied to the cooled device 4 through the circulating water line L2. The circulating water W2 supplied to the apparatus 4 to be cooled is heat-exchanged and heated. The heated circulating water W2 returns to the cooling tower 5 again through the circulating water line L2, and is cooled.

  In the detection device 10, the biodegradable dye addition unit 1 adds an amount of biodegradable dye proportional to the flow rate of the makeup water W 4 measured by the flow rate measurement unit 7 to the circulating water W 2.

  In the detection device 10, the determination unit 3 transmits an external signal to the inhibitor addition device 6 when it is determined that the slime contamination of the circulation system is progressing. When the inhibitor addition device 6 receives an external signal from the determination unit 3, the amount of the slime inhibitor added to the circulating water W2 stored in the storage unit 53 of the cooling tower 5 is a predetermined ratio (for example, about 5%). Increase with. Further, when the determination unit 3 determines that the circulation slime contamination is not progressing after increasing the addition amount of the slime inhibitor, the determination unit 3 sets the addition amount of the slime inhibitor to a predetermined ratio (for example, about 5%). ) To decrease.

  According to the water treatment system 100A according to the second embodiment, for example, the following effects can be obtained.

  In the water treatment system 100A according to the second embodiment, the detection device 10 can accurately and easily detect the progress of slime contamination in the circulating water system including the open-type cooling tower 5. Therefore, the water treatment system 100A can appropriately adjust the input amount of the water treatment agent such as the slime inhibitor while regularly monitoring the progress of slime contamination in the circulation system including the open cooling tower 5. it can.

  In 2nd Embodiment, although the inhibitor addition apparatus 6 demonstrated the structure which adds the amount of slime inhibitors proportional to the flow volume of the makeup water W4 measured by the flow volume measurement part 7, to the circulating water W2, it is limited to this. Not. For example, the inhibitor addition device 6 may be configured to add a slime inhibitor to the circulating water W2 at predetermined time intervals (timer drug injection). In the case of timer drug injection, when the determination unit 3 determines that the slime contamination of the circulatory system is in progress, the inhibitor addition device 6 increases the drug injection time of the slime inhibitor. Moreover, the structure which adds the amount of slime inhibitors proportional to the flow volume drained from the drainage line L3 to the circulating water W2 (blow synchronous chemical injection) may be sufficient as the inhibitor addition apparatus 6. In the case of blow-synchronized chemical injection, when the determination unit 3 determines that slime contamination is in progress, the inhibitor addition device 6 increases the amount of the slime inhibitor for one batch.

  In the second embodiment, the detection device 10 uses the detection device 10a (see FIG. 1) in which the biodegradable pigment addition unit 1 adds the biodegradable pigment to the circulating water W1 flowing through the circulating water line L1. It is not limited to. For example, the detection apparatus 10 includes a detection apparatus 10b (see FIG. 3) in which the biodegradable dye addition unit 1 adds a biodegradable dye to the circulating water sample Ws accommodated in the measurement cell 21 of the light intensity detection unit 2. It may be used.

  In 2nd Embodiment, although the biodegradable pigment | dye addition part 1 demonstrated the structure which adds a biodegradable pigment | dye to the circulating water W2 which flows through the circulating water line L2, it is not limited to this. For example, the biodegradable pigment addition unit 1 may add a biodegradable pigment to the makeup water W4 flowing through the makeup water line L4.

  In 2nd Embodiment, although 100 A of water treatment systems demonstrated the structure which adjusts the addition amount of the slime inhibitor added from the inhibitor addition apparatus 6 based on the determination result of the determination part 3, it is not limited to this. . For example, the water treatment system 100A may adjust the blowdown timing by controlling the opening / closing operation of the drain valve 11 of the drain line L3 based on the determination result of the determination unit 3. Further, the water treatment system 100A may cause the overflow by opening the supply valve 12 of the makeup water line L4 based on the determination result of the determination unit 3 and forcibly supplying the makeup water W4 to the cooling tower 5. .

  In 2nd Embodiment, although the inhibitor addition apparatus 6 demonstrated the structure which adds a slime inhibitor to the storage part 53 of the cooling tower 5, it is not limited to this. For example, the inhibitor addition device 6 may add a slime inhibitor to the circulating water line L <b> 2, the makeup water line L <b> 4, or the sprinkler 52 of the cooling tower 5.

  In 2nd Embodiment, although the biodegradable pigment | dye addition part 1 demonstrated the structure which adds the biodegradable pigment | dye of the quantity proportional to the flow volume of the makeup water W4 measured by the flow measurement part 7 to the circulating water W2, It is not limited to this. For example, the biodegradable pigment addition unit 1 may be configured to add an amount of biodegradable pigment proportional to the circulating flow rate of the circulating water W2 to the circulating water W2 or the makeup water W4, or biodegradable at predetermined time intervals. It is good also as a structure which adds a sex pigment to circulating water W2 or makeup water W4.

(Third embodiment)
A water treatment system according to a third embodiment of the present invention will be described with reference to FIG. FIG. 5 is an overall configuration diagram of a water treatment system 100B according to the third embodiment. A water treatment system 100 </ b> B according to the third embodiment is an example in which the detection device 10 according to the first embodiment is applied to a circulating water system including a hermetic cooling tower 8.

  As shown in FIG. 5, the water treatment system 100 </ b> B includes a hermetic cooling tower 8, a circulating water line L <b> 2, a detection device 10, and an inhibitor addition device 6. In the third embodiment, the same or equivalent components as those in the first embodiment and the second embodiment will be described with the same reference numerals. Moreover, in 3rd Embodiment, the description which overlaps with 1st Embodiment and 2nd Embodiment is abbreviate | omitted.

  The hermetic cooling tower 8 is a device that cools the cooling water W5 supplied to the apparatus to be cooled 4 with the circulating water W2. The cooling tower 8 includes a main body portion 81, a water sprinkling portion 82, a storage portion 83, a cooling coil 84, a drainage line L3, and a makeup water line L4.

  The main body 81 forms the outline of the cooling tower 8. An opening is provided in the upper part of the main body 81. A fan driven by a motor is provided in the opening. The outer wall of the main body 81 is provided with ventilation holes for allowing outside air (air) to flow into the cooling tower 8. Inside the main body 51, when the fan is driven, air in the main body 81 is discharged to the outside, and a ventilation space into which new air flows from the ventilation holes is formed. Further, a sprinkler 82, a reservoir 83, and a part of the cooling coil 84 are provided inside the main body 81.

  The water sprinkling part 82 cools the cooling coil 84 by spraying the circulating water W2 to the cooling coil 84 through which the cooling water W5 that cools the cooled device 4 flows. The water sprinkling part 82 is provided in the upper part of the main-body part 81, and is connected with the circulating water line L2.

  The reservoir 83 is a tank that stores the circulating water W2 sprayed from the sprinkler 82. The reservoir 83 is provided at the lower part of the main body 81. A circulating water line L2, a drainage line L3, and a makeup water line L4 are connected to the storage unit 83.

  The cooling coil 84 is a line through which cooling water W5 for cooling the apparatus to be cooled 4 flows in a sealed state. The cooling coil 84 is connected to the apparatus to be cooled 4. The cooling coil 84 includes a pump P4 that pumps the cooling water W5 to the apparatus 4 to be cooled. A part of the cooling coil 84 is located inside the main body 81 and is cooled by the circulating water W2 sprayed from the sprinkler 82. The cooling water W <b> 5 flowing through the cooling coil 84 is cooled by the circulating water W <b> 2 sprayed from the sprinkler 82 and then supplied to the cooled device 4.

  In the third embodiment, the circulating water line L <b> 2 is a line that collects the circulating water W <b> 2 stored in the storage unit 83 in the sprinkling unit 82. The circulating water line L <b> 2 is connected to the water sprinkling part 82 and the storage part 83 of the cooling tower 8.

  Next, operation | movement of the water treatment system 100B of 3rd Embodiment is demonstrated. In addition, about the detection of slime contamination of the detection apparatus 10, since it is the same as 1st Embodiment, description is abbreviate | omitted. Further, the description of the part that performs the same control as in the second embodiment is omitted.

  In the water treatment system 100 </ b> B, the cooling water W <b> 5 that cools the cooled device 4 circulates through the cooling coil 84. The cooling coil 84 is cooled by the circulating water W2 sprayed from the water sprinkling part 82 of the cooling tower 8. When the cooling coil 84 is cooled, the cooling water W5 flowing through the cooling coil 84 is cooled. The cooled cooling water W5 is supplied to the apparatus to be cooled 4 and heated by heat exchange. The heated cooling water W <b> 5 flows through the cooling coil 84, and the circulating water W <b> 2 is sprayed on the cooling coil 84 again to be cooled.

  In the water treatment system 100B, the circulating water W2 is supplied from the storage part 83 of the cooling tower 8 to the watering part 82 through the circulating water line L2. The circulating water W <b> 2 supplied to the sprinkler 82 is sprayed on the cooling coil 84. Circulating water W2 sprayed from the sprinkler 82 is stored in the reservoir 83. The circulating water W2 stored in the storage unit 83 is supplied to the sprinkling unit 82 again through the circulating water line L2.

  In the water treatment system 100B of the third embodiment, similarly to the water treatment system 100A of the second embodiment, the inhibitor addition device 6 suppresses slime according to the determination result of slime contamination of the determination unit 3 of the detection device 10. The amount of agent added is adjusted.

  According to the water treatment system 100B according to the third embodiment, for example, the following effects can be obtained.

  In the water treatment system 100B according to the third embodiment, the detection device 10 can accurately and easily detect the progress of slime contamination in the circulating water system including the hermetic cooling tower 8. Therefore, the water treatment system 100B can appropriately adjust the input amount of the water treatment agent such as the slime inhibitor while regularly monitoring the progress of the slime contamination in the circulation system including the hermetic cooling tower 8. it can.

(Fourth embodiment)
A water treatment system according to a fourth embodiment of the present invention will be described with reference to FIG. FIG. 6 is an overall configuration diagram of a water treatment system 100C according to the fourth embodiment. A water treatment system 100C according to the fourth embodiment is an example in which the detection device 10b (see FIG. 3) according to the first embodiment is applied to a circulating water system including the reverse osmosis membrane module 9. In the fourth embodiment, a concentrated water circulation system on the primary side of a crossflow type reverse osmosis membrane device will be described as an example.

  As shown in FIG. 6, the water treatment system 100C includes a supply water line L6, a reverse osmosis membrane module 9, a permeate water line L7, a concentrated water line L8, a concentrated water recirculation line L9, a detection device 10b, And an inhibitor addition device 6. In the fourth embodiment, the same or equivalent components as those in the first embodiment will be described with the same reference numerals. Moreover, in 4th Embodiment, the description which overlaps with 1st Embodiment is abbreviate | omitted.

  The supply water line L6 is a line through which the supply water W6 flows. As shown in FIG. 6, the supply water line L <b> 6 is connected to the reverse osmosis membrane module 9. The supply water line L6 is connected to the concentrated water recirculation line L9. The supply water line L6 includes a pressurizing pump P5 that pumps the supply water W6 to the reverse osmosis membrane module 9. The supply water line L6 supplies the supply water W6 to the reverse osmosis membrane module 9 by the pressurizing pump P5.

  The reverse osmosis membrane module 9 includes a single or a plurality of reverse osmosis membrane elements (not shown). The reverse osmosis membrane module 9 separates the supply water W6 into permeate water W7 and concentrated water W8 by reverse osmosis membrane elements.

  The permeated water line L7 is a line for sending the permeated water W7 separated by the reverse osmosis membrane module 9 to a demand destination device or the like (not shown).

  The concentrated water line L8 is a line for draining the concentrated water W8 separated by the reverse osmosis membrane module 9. The concentrated water line L8 includes a drain valve 13 on the downstream side. The drain valve 13 is a valve that adjusts the discharge flow rate of the concentrated water W8 discharged from the concentrated water line L8 to the outside of the system.

  The concentrated water reflux line L9 is a line that circulates a part of the concentrated water W8 flowing through the concentrated water line L8 (hereinafter also referred to as “concentrated reflux water W9”) to the supply water line L6. In the fourth embodiment, a part of the concentrated water W8 is circulated in the concentrated water recirculation line L9, the supply water line L6, the reverse osmosis membrane module 9, and the concentrated water line L8.

  The detection device 10b is connected to the concentrated water reflux line L9. The detection apparatus 10b determines the slime contamination of the circulatory system by detecting the light intensity of the circulating water sample Ws collected from the concentrated circulating water W9 flowing through the concentrated water circulating line L9.

  In the detection apparatus 10b, the biodegradable dye addition unit 1 is connected to the measurement cell 21 of the light intensity detection unit 2, and adds the biodegradable dye to the circulating water sample Ws accommodated in the measurement cell 21.

  In the fourth embodiment, the biodegradable dye added from the biodegradable dye adding unit 1 has a molecular weight of at least 100 or more so as not to permeate the reverse osmosis membrane.

  In the detection device 10b, the determination unit 3 determines the slime contamination of the circulatory system based on the temporal change of the light intensity of the circulating water sample Ws detected by the light intensity detection unit 2. The determination unit 3 is electrically connected to the inhibitor addition device 6.

  In 4th Embodiment, while the inhibitor addition apparatus 6 is connected to the supply water line L6, it is arrange | positioned upstream from the concentrated water recirculation line L9. The inhibitor addition device 6 adds a slime inhibitor in an amount proportional to the drainage flow rate of the concentrated water W8 to the supply water W6. Moreover, the inhibitor addition apparatus 6 will increase the addition amount of a slime inhibitor by a predetermined ratio (for example, about 5%), if the external signal from the determination part 3 is received.

  Next, the operation of the water treatment system 100C of the fourth embodiment will be described. Note that the detection of slime contamination by the detection device 10b is the same as in the first embodiment, and a description thereof will be omitted.

  The feed water W6 flowing through the feed water line L6 is pumped to the reverse osmosis membrane module 9 by the pressurizing pump P5. The feed water W6 pumped to the reverse osmosis membrane module 9 is separated into permeated water W7 and concentrated water W8 by the reverse osmosis membrane module 9.

  The permeated water W7 is supplied to the demand destination apparatus through the permeated water line L7. The concentrated water W8 flows to the concentrated water line L8. On the downstream side of the concentrated water line L8, a part of the concentrated water W8 is drained outside the system by the opening / closing operation of the drain valve 13. Further, a part of the other concentrated water W8 is circulated to the supply water line L6 through the concentrated water reflux line L9 as the concentrated reflux water W9.

  The detection apparatus 10b introduces the circulating water sample Ws collected from the concentrated circulating water W9 flowing through the concentrated water circulating line L9 into the measurement cell 21 through the circulating water sample line Ls. The biodegradable dye addition unit 1 adds the biodegradable dye to the circulating water sample Ws accommodated in the measurement cell 21. The light intensity detection unit 2 detects the light intensity of the circulating water sample Ws at a predetermined time interval (for example, 24 to 48 hour intervals), and acquires data on the light intensity with time. The determination unit 3 determines the progress of slime contamination in the circulatory system based on the temporal change in the light intensity of the circulating water sample Ws.

  The determination part 3 transmits an external signal to the inhibitor addition apparatus 6 when it determines with slime contamination progressing. When the inhibitor addition device 6 receives the external signal from the determination unit 3, the inhibitor addition device 6 increases the amount of the slime inhibitor added to the supply water W6 at a predetermined rate (for example, about 5%). Further, when the determination unit 3 determines that the circulation slime contamination is not progressing after increasing the addition amount of the slime inhibitor, the determination unit 3 sets the addition amount of the slime inhibitor to a predetermined ratio (for example, about 5%). ) To decrease.

  According to the water treatment system 100C according to the fourth embodiment, for example, the following effects can be obtained.

  In the water treatment system 100C according to the fourth embodiment, the detection device 10 can accurately and easily detect the progress of slime contamination in the circulating water system of the concentrated water on the primary side of the crossflow reverse osmosis membrane device. . Therefore, the water treatment system 100C monitors the progress of slime contamination in the circulation system of the concentrated water on the primary side of the crossflow type reverse osmosis membrane device, and inputs the amount of water treatment agent such as slime inhibitor. Can be adjusted appropriately.

  In 4th Embodiment, although the inhibitor addition apparatus 6 demonstrated the structure which adds the amount of slime inhibitors proportional to the waste_water | drain flow volume of the concentrated water W8, it is not limited to this. For example, the inhibitor addition device 6 may add a slime inhibitor in an amount proportional to the flow rate of raw water sent from the supply source.

  In 4th Embodiment, although the inhibitor addition apparatus 6 demonstrated the structure added to the supply water line L6, it is not limited to this. For example, the inhibitor addition device 6 may add a slime inhibitor to the concentrated water line L8 or the concentrated water reflux line L9.

  Although the present invention has been described in each embodiment with a certain degree of detail, the disclosure content of these embodiments should be changed in the details of the configuration, and the combination of elements and the change in the order in each embodiment are different. It can be implemented without departing from the scope and spirit of the claimed invention.

  In 2nd-4th embodiment, although the structure provided with the inhibitor addition apparatus 6 was demonstrated, the inhibitor addition apparatus 6 is not an essential structure.

  The present invention can accurately and easily detect the slime contamination of the circulating water system, and thus is useful for a concentrated circulating water system water treatment system including a cooling tower or a reverse osmosis membrane device.

DESCRIPTION OF SYMBOLS 1 Biodegradable dye addition part 2 Light intensity detection part 3 Judgment part 4 Cooling apparatus 5 Open type cooling tower 6 Inhibitor addition apparatus 7 Flow rate measurement part 8 Sealing type cooling tower 9 Reverse osmosis membrane module 10 Detection apparatus 100 Water treatment system 11, 12, 13 Valve P1, P2, P3, P4, P5 Pump

Claims (5)

A detection device for detecting slime contamination in a circulating water system,
A biodegradable dye addition section for adding biodegradable dye to the circulating water;
A light intensity detector that detects the light intensity of the circulating water to which the biodegradable dye has been added at predetermined time intervals;
A determination unit that determines slime contamination of the circulating water system based on a temporal change in the light intensity detected by the light intensity detection unit;
A detection device comprising: A detection device for detecting slime contamination in a circulating water system,
A biodegradable dye addition unit for adding a biodegradable dye to a circulating water sample collected from the circulating water system;
A light intensity detector for detecting the light intensity of the circulating water sample to which the biodegradable dye has been added at predetermined time intervals;
A determination unit that determines slime contamination of the circulating water system based on a temporal change in the light intensity detected by the light intensity detection unit;
A detection device comprising: A cooling tower that circulates and cools the circulating water supplied to the apparatus to be cooled in the ventilation space by a sprinkler, and stores the dispersed circulating water in a reservoir;
While supplying the circulating water from the storage unit to the cooled device and collecting the circulating water from the cooled device to the sprinkling unit, the circulating water is disposed between the cooling tower and the cooled device. A circulating water line to circulate in,
A detection device for detecting slime contamination in a circulating water system including the cooling tower, the cooled device, and the circulating water line;
The detection device includes:
A biodegradable dye addition unit for adding a biodegradable dye to the circulating water;
A light intensity detector that detects the light intensity of the circulating water to which the biodegradable dye has been added at predetermined time intervals;
A determination unit that determines slime contamination of the circulating water system based on a temporal change in the light intensity detected by the light intensity detection unit;
A water treatment system comprising: Cooling water for cooling the device to be cooled is circulated in a sealed state, the circulating water is sprayed and cooled by a sprinkling unit, and the dispersed circulating water is stored in the storage unit, and a cooling tower,
A circulating water line for circulating the circulating water between the storage unit and the watering unit;
A detection device for detecting slime contamination of a circulating water system including the cooling tower and the circulating water line,
The detection device includes:
A biodegradable dye addition unit for adding a biodegradable dye to the circulating water;
A light intensity detector that detects the light intensity of the circulating water to which the biodegradable dye has been added at predetermined time intervals;
A determination unit that determines slime contamination of the circulating water system based on a temporal change in the light intensity detected by the light intensity detection unit;
A water treatment system comprising: A reverse osmosis membrane module that separates supply water into permeate and concentrated water;
A supply water line for supplying the supply water to the reverse osmosis membrane module;
A permeate line for delivering permeate from the reverse osmosis membrane module;
A concentrated water line for delivering concentrated water from the reverse osmosis membrane module;
A concentrated water reflux line for refluxing a part of the concentrated water flowing through the concentrated water line to the supply water line;
A detection device for detecting slime contamination in a circulating water system including the supply water line, the reverse osmosis membrane module, the concentrated water line, and a concentrated water reflux line;
The detection device includes:
A biodegradable dye addition unit for adding a biodegradable dye to a circulating water sample collected from the circulating water system;
A light intensity detector for detecting the light intensity of the circulating water sample to which the biodegradable dye has been added at predetermined time intervals;
A determination unit that determines slime contamination of the circulating water system based on a temporal change in the light intensity detected by the light intensity detection unit;
A water treatment system comprising:

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