WO2015159711A1

WO2015159711A1 - Water-quality management device, water-quality management system, and water-quality management method

Info

Publication number: WO2015159711A1
Application number: PCT/JP2015/060320
Authority: WO
Inventors: 信太郎森; 幸祐志村
Original assignee: 栗田工業株式会社
Priority date: 2014-04-18
Filing date: 2015-04-01
Publication date: 2015-10-22
Also published as: JP2015205237A

Abstract

Provided are: a water-quality management device capable of analyzing multiple types of water-quality parameters for a circulating water system such as one for coolant or boiler water while in the field, and quickly presenting a suitable measure on the basis of the analysis results; a water-quality management system; and a water-quality management method. This water-quality management device is equipped with: an input unit (112) for receiving the input of a plurality of water-quality parameters obtained by measuring a water sample collected from a water treatment facility; a storage unit (118) for storing data about a measure which incorporates changes to the plurality of water-quality parameters and the water treatment state of the water treatment facility; a computation unit (116) for referring to the data about the measure and selecting the water treatment state corresponding to the inputted plurality of water-quality parameters; and a display unit (114) for displaying the water treatment state selected by the computation unit (116).

Description

Water quality management device, water quality management system, and water quality management method

The present invention relates to a water quality management device, a water quality management system, and a water quality management method for circulating water systems such as cooling water and boiler water.

In various factories, buildings, etc., water systems including various heat exchangers such as refrigerators are provided, and circulating water (cooling water) and the object to be cooled are brought into contact with each other via the heat exchanger to cool the object to be cooled. is doing. In recent years, in circulating water systems, circulating water has been operated with higher concentration in order to save water. Under such operating conditions, ionic components are concentrated as the circulating water evaporates. However, scale may precipitate and adhere to the refrigerator.

When the scale adheres to the refrigerator, heat transfer from the cooled object to the circulating water is hindered. As a result, in the condenser, the amount of the object to be cooled decreases, the pressure increases, the load on the compressor increases as the temperature of the object to be cooled increases, and the high pressure cut (the compressor stops at a certain level or more) )) May occur. Moreover, due to the adhesion of the scale, the refrigerating capacity of the refrigerator is reduced, the power consumption is increased, and the energy efficiency is lowered. For this reason, it is necessary to appropriately control the concentration of the circulating water system and the concentration of the scale inhibitor to suppress the precipitation of scale.

In an open circulating cooling water system, the air is sucked with a fan to evaporate water, and BOD (Biochemical Oxygen Demand) components such as earth and sand, dust, and organic solvents contained in the atmosphere dissolve in the circulating water system, or algae by sunlight. The occurrence of various types of obstacles such as reduction in energy efficiency and corrosion in the heat exchanger occurs due to the generation of slime. For this reason, in an open circulation cooling water system, it is important to appropriately manage the concentration of the slime control agent.

For example, there is known a method for controlling the concentration of water treatment chemicals present in the circulation water by measuring the concentration of organic substances contained in the circulation water and determining the addition amount of the water treatment chemicals based on the measured values ( Patent Document 1). In addition, the oxidation-reduction potential of the cooling water is measured, and the electrolyzed water that controls the energization of the electrode immersed in the cooling water based on the measured value and generates a chlorine-based oxidant from chloride ions contained in the water. Is contained in the cooling water of the cooling water system to control the concentration of the chlorine-based oxidant in the cooling water to an appropriate range and prevent the generation of slime in the cooling water system (see Patent Document 2).

Japanese Patent Laid-Open No. 2002-210454 Japanese Patent No. 3521896

In order to prevent failures that occur in the cooling water system, it is necessary not only to adjust the water treatment chemical injection amount, but also to accurately respond to various types of information such as the residual concentration of consumable chemicals such as bactericides and scale inhibitors. Thus, as in Patent Documents 1 and 2, in the control that focuses on only one item of water quality such as organic substance concentration and oxidation-reduction potential, an erroneous determination may be made and water treatment equipment may not be managed appropriately.

Therefore, after bringing back the water collected at the site, a plurality of water quality parameters are analyzed, and the injection amount and blow amount of various drugs are adjusted based on these values. However, in this case, the time lag from the analysis to the execution of the countermeasure is as long as several days, and there is a possibility that a failure may occur during this time. In addition, there is a problem that judgment of countermeasures to be taken depends largely on the discretion and experience level of the individual, and judgment errors can occur.

The present invention has been made in view of the above circumstances, and can analyze a plurality of water quality parameters of a circulating water system such as cooling water and boiler water on site, and can promptly present appropriate measures based on the analysis result. It is an object to provide a water quality management device, a water quality management system, and a water quality management method.

The water quality management device of the present invention includes an input unit for inputting a plurality of water quality parameters measured for sample water collected from a water treatment facility, changes in the plurality of water quality parameters, and a water treatment status in the water treatment facility. A storage unit that stores countermeasure data in combination, a calculation unit that refers to the countermeasure data, selects a water treatment status corresponding to a plurality of input water quality parameters, and a water treatment status selected by the calculation unit. A display unit for displaying.

In one aspect of the present invention, the countermeasure data is a combination of a plurality of water quality parameter changes, a water treatment status in the water treatment facility, and a measure to be applied to the water treatment facility. The measure corresponding to the plurality of water quality parameters is selected, and the display unit displays the measure selected by the calculation unit.

In one aspect of the present invention, the storage unit stores a water quality parameter input via the input unit, and the calculation unit uses a trend including past water quality parameters stored in the storage unit. The water treatment status or measures are selected.

In one aspect of the present invention, the apparatus further includes a plurality of water quality measuring devices that measure a plurality of water quality parameters of the sample water, and the calculation unit refers to the countermeasure data and includes a plurality of water quality measuring devices measured by the plurality of water quality measuring devices. The water treatment status corresponding to the water quality parameter is selected.

In one aspect of the present invention, the water quality measuring instrument includes at least two of an optical measuring instrument for measuring transmittance or absorbance, one or two ion electrodes, and an electric conductivity meter. It is characterized by that.

The water quality management system of the present invention has an input unit for inputting a plurality of water quality parameters measured for sample water collected from a water treatment facility, a communication unit for transmitting the plurality of input water quality parameters, and a display unit. A data communication device; a database storing countermeasure data in which a plurality of water quality parameter changes, a water treatment status in the water treatment facility, and a measure to be applied to the water treatment facility are stored; A server device that selects a water treatment status and countermeasures corresponding to a plurality of water quality parameters received from the data communication device, and notifies the data communication device of the selected water treatment status and countermeasures, the data communication device Displays the water treatment status and countermeasures notified from the server device on the display unit.

In one aspect of the present invention, the data communication device is provided in an analyzer having a plurality of water quality measuring devices for measuring a plurality of water quality parameters of sample water.

The water quality management method of the present invention measures a plurality of water quality parameters for water collected from a water treatment facility using one or a plurality of analyzers, changes in the plurality of water quality parameters, and water treatment status in the water treatment facility And a water quality management device that stores countermeasure data combining countermeasures to be applied to the water treatment facility, refers to the countermeasure data, selects a water treatment status and countermeasure corresponding to the measured water quality parameter, and a display unit The selected water treatment status and countermeasures are displayed.

In one embodiment of the present invention, pH, electrical conductivity, chloride ion concentration, sulfate ion concentration, acid consumption (pH 4.8), acid consumption (pH 8.3), magnesium hardness, calcium hardness, silica concentration, iron Concentration, copper concentration, ammonium ion concentration, residual chlorine concentration, redox potential, TOC (total organic carbon), COD (chemical oxygen demand), polymer concentration, total phosphate concentration, zinc concentration, and turbidity Two or more kinds of water quality parameters selected from the above are measured.

According to the present invention, referring to countermeasure data combining a plurality of water quality parameter changes, water treatment status in the water treatment facility, and measures to be taken on the water treatment facility, two types detected on-site by the analyzer Since the water treatment status and countermeasures corresponding to the above water quality parameters are automatically displayed on the display unit, the user can promptly confirm and implement appropriate countermeasures at the site regardless of his / her discretion and experience level. it can. By using two or more types of water quality parameters, it is possible to detect the occurrence of a failure that cannot be determined (or overlooked) by changing only one type of water quality parameter, and promptly take appropriate measures for the water treatment device. Thus, it is possible to suppress a failure that occurs in the circulating water system.

The analyzer has a plurality of water quality measuring instruments, so that a single analyzer can measure a plurality of water quality parameters. By installing the water quality management function in this analyzer, one analyzer can analyze multiple water quality parameters, determine the water treatment status in the water treatment facility, and take measures to be taken on the water treatment facility. Can be presented.

It is the schematic of the water quality management system which concerns on embodiment of this invention. It is a block diagram of an open circulation type cooling water system. It is a block diagram of the water quality management device concerning the embodiment of the present invention. It is a figure which shows an example of countermeasure data. It is a perspective view of the analyzer which can measure a some water quality parameter. It is a perspective view explaining the measuring method using the analyzer of FIG. It is a block diagram of the analyzer of FIG. It is the schematic of the water quality management system by a modification.

Hereinafter, embodiments of the present invention will be described in detail.

FIG. 1 is a schematic diagram of a water quality management system according to an embodiment of the present invention. As shown in FIG. 1, the water quality management system includes a water treatment facility 100, a water treatment device 102, a plurality of analyzers 104, and a water quality management device 110.

The water treatment facility 100 is a circulating cooling water system in which circulating water (cooling water) and an object to be cooled are brought into contact with each other via a heat exchanger to cool the object to be cooled. FIG. 2 shows an example of a circulating cooling water system. FIG. 2 is a schematic diagram of an open circulation type cooling water system which is one type of circulation type cooling water system.

As shown in FIG. 2, in the open circulation type cooling water system, water whose temperature is increased by heat exchange in the heat exchanger 61 is supplied to the cooling tower 60. The warm water supplied to the cooling tower 60 flows down the filler 62, and countercurrently contacts with air to partially evaporate. The water cooled by the latent heat of vaporization is stored in a pit below the cooling tower 60 and supplied to the heat exchanger 61 by the pump 63. Blow is performed by opening a blow valve (not shown) of the blow water pipe 64. Makeup water corresponding to the total amount of evaporation and blown water is supplied from the make-up water pipe 65 to the cooling tower 60 via a ball tap (not shown).

1 injects water treatment chemicals such as a scale inhibitor, an anticorrosive, a sludge dispersant, a disinfectant, and a slime inhibitor into the water used in the water treatment facility 100. For example, water treatment chemicals are injected into the water stored in the cooling tower 60 shown in FIG.

The analyzer 104 analyzes the water quality parameter of the circulating water or makeup water of the water treatment facility 100. A plurality of analyzers 104 are provided, and a plurality of types of water quality parameters are analyzed. The water quality parameters to be analyzed are in accordance with the use of the water treatment facility 100 and the type of water treatment chemical injected by the water treatment apparatus 102. For example, pH, electrical conductivity, chloride ion concentration, sulfate ion concentration , Acid consumption (pH 4.8), acid consumption (pH 8.3), magnesium hardness, calcium hardness, silica concentration, iron concentration, copper concentration, ammonium ion concentration, residual chlorine concentration, redox potential, TOC (total organic Carbon), COD (chemical oxygen demand), polymer concentration, total phosphoric acid concentration, zinc concentration, and two or more selected from the group consisting of turbidity, more preferably three or more. The analysis of each water quality parameter may be performed according to a known method, and detailed description is omitted.

The analyzer 104 analyzes water quality parameters of sample water collected from the water treatment facility 100. For example, water in the pit of the cooling tower 60 shown in FIG. 2, water supplied to the heat exchanger 61 by the pump 63, or water supplied from the heat exchanger 61 to the cooling tower 60, preferably water in the pit. A part is collected and used as sample water for circulating water. Further, a part of the makeup water supplied from the pipe 65 to the cooling tower 60 is sampled and used as the makeup water sample water.

The analyzer 104 may be portable or may be a constant analyzer using an apparatus capable of online analysis.

The water quality management device 110 estimates the water treatment status in the water treatment facility 100 based on the analysis result of the analyzer 104, and presents measures to be taken on the water treatment facility 100 according to the estimated status. It may be left as evidence of plant management by recording the implementation history of the presented countermeasures.

Fig. 3 shows a block diagram of the water quality management device 110. The water quality management device 110 includes an input unit 112, a display unit 114, a calculation unit 116, and a memory 118, and can be configured by a portable device such as a notebook PC (personal computer) or a tablet terminal. The input unit 112 is configured by, for example, a button, a switch, a numeric keypad, and the like, and a user can input water quality parameters obtained by the analyzer 104. The water quality parameter may be transferred from the analyzer 104 to the water quality management device 110 via a wireless / wired network. The input water quality parameter is stored in the memory 118.

The calculation unit 116 may calculate the concentration factor using the input water quality parameter of the circulating water and the water quality parameter of the makeup water, and store the calculated concentration factor in the memory 118. The calculation unit 116 may calculate a Langeria index, a Risner index, a Mattson ratio, and the like and store them in the memory 118.

For example, the Langeria index (saturation index) of the circulating water system can be calculated using the acid consumption (pH 4.8), pH, calcium hardness, and electrical conductivity. The Langeria index is a difference between the pH of circulating water and the saturated pH (pHs) of calcium carbonate, and is an index for measuring the corrosivity of metal materials such as piping and heat exchangers in an aqueous system. The pHs is obtained by the following formula 1 by a simple calculation method (Nodel method).

PHs = (9.3 + A value + B value) − (C value + D value) (Equation 1)

Here, the A value is a value determined by the concentration of the evaporation residue, and is obtained from the electric conductivity. The B value is a value determined from the temperature of the circulating water. The C value is a value determined by the calcium hardness. The D value is a value determined by the acid consumption (pH 4.8).

In addition, the Rizner index RSI (Ryznar Stability Index), which is an index of the corrosiveness of water and the tendency of scale formation, can be calculated by the following formula 2 using the pH of circulating water and the saturated pH (pHs) of calcium carbonate. .

RSI = 2pHs-pH (Formula 2)

When the RSI is less than 6, it indicates that the water tends to form a scale, when the RSI is 6 or more and less than 7, it indicates that the water is in a stable state, and when the RSI is 7 or more, it indicates that the water tends to corrode. .

The Mattson ratio, which is an index of occurrence of copper pitting corrosion, can be calculated using the sulfate ion concentration, the acid consumption (pH 4.8), and the acid consumption (pH 8.3). The Mattson ratio is the ratio of the bicarbonate ion concentration to the sulfate ion concentration in water ([HCO ₃ ⁻ ] / [SO ₄ ²⁻ ]), and the bicarbonate ion concentration HCO ₃ ⁻ (mgHCO ₃ ⁻ / L) is 3 can be obtained.

HCO ₃ ⁻ (mgHCO ₃ ⁻ /L)=1.22×(acid consumption (pH 4.8) −2 × acid consumption (pH 8.3)) (Formula 3)

When the Mattson ratio is 1 or less and residual chlorine is present, it is judged that pitting corrosion is likely to occur in copper with hot water of about 60 ° C (Exhibition: JRA-GL02 (1994) Japan Refrigeration and Air Conditioning Industry Association) .

The display unit 114 of the water quality management device 110 is, for example, a liquid crystal display, and displays a water treatment status estimated by a calculation unit 116 described later and measures to be taken on the water treatment facility 100.

The memory 118 stores the water quality parameters input via the input unit 112, the concentration factor calculated by the calculation unit 116, and the like. The memory 118 stores countermeasure data that combines item names of a plurality of water quality parameters, changes in the water quality parameters, estimated water treatment status in the water treatment facility 100, and measures to be taken on the water treatment facility 100. The change of the water quality parameter includes not only that the measurement value changes but also that the measurement value continues to maintain a predetermined reference value. FIG. 4 shows an example of countermeasure data.

[Countermeasure data D1, D2]
In the countermeasure data D1 and D2, paying attention to the polymer concentration and the zinc concentration / total phosphoric acid concentration, even if the polymer concentration maintains the reference value concentration, the zinc concentration / total phosphoric acid concentration is the polymer concentration and the water treatment agent. When the concentration is lower than the concentration calculated from the blending rate, it is estimated that there is a possibility that corrosion has started to occur in the water treatment facility 100, and this is a measure against a situation where an increase in the amount of anticorrosive injected is estimated.

When zinc, phosphoric acid, and polymer are injected into the water treatment facility 100 as a single agent, and the injection of water treatment chemicals is controlled only by the polymer concentration, the zinc concentration / total phosphoric acid concentration is reduced as described above. However, since the polymer concentration is maintained at the reference value concentration, it is determined that there is no problem, and detection of the occurrence of corrosion is delayed. However, by monitoring the zinc concentration / total phosphoric acid concentration together with the polymer concentration, even if the polymer concentration is maintained at the standard value concentration, the occurrence of corrosion can be detected early due to the decrease in the zinc concentration / total phosphoric acid concentration. And take appropriate action.

[Countermeasure data D3]
In the countermeasure data D3, paying attention to the chloride ion concentration, the sulfate ion concentration, and the Mattson ratio, even if the chloride ion concentration and the sulfate ion concentration maintain the reference value concentrations, It is presumed that corrosion of the copper material has begun to occur in the processing facility 100, and this is a measure against the situation where the reduction of the concentration factor due to the increase in the blow amount and the increase in the injection amount of the anticorrosive agent are estimated.

When corrosive anions in circulating water are monitored only by chloride ion concentration and sulfate ion concentration, as described above, chloride ion concentration and sulfate ion concentration maintain the reference value concentration even when the Mattson ratio is 1 or less. Therefore, it is judged that there is no problem, and the detection of the occurrence of corrosion of the copper material is delayed. However, by monitoring the Mattson ratio together with the chloride ion concentration and the sulfate ion concentration, even if the chloride ion concentration and the sulfate ion concentration maintain the reference value concentration, the Mattson ratio becomes 1 or less. It is possible to detect the corrosion of copper material at an early stage and take appropriate measures.

[Countermeasure data D4, D5]
In the countermeasure data D4 and D5, paying attention to turbidity and iron concentration / copper concentration, when the turbidity and iron concentration / copper concentration increase, corrosion in the water treatment facility 100 or secondary corrosion due to brought-in iron begins to occur. This is a countermeasure for the situation where the increase in the amount of anticorrosive injected is estimated.

When the injection of water treatment chemicals is controlled only by turbidity, as described above, even if the turbidity rises, there are various causes such as deterioration of makeup water quality, increase of concentration factor, process leak, etc. Yes, the cause cannot be identified, and detection of corrosion occurrence is delayed. However, by monitoring the iron concentration / copper concentration together with the turbidity, it is possible to identify the cause of the increase in turbidity as a result of iron / copper, detect the occurrence of corrosion at an early stage, and take appropriate measures. Can do.

[Countermeasure data D6]
In the countermeasure data D6, paying attention to the polymer concentration and the COD, if the COD with respect to the polymer concentration in the circulating water is increased even if the polymer concentration is maintained at the reference value concentration, the COD component from the outside in the water treatment facility 100 It is estimated that there is a possibility that slime has begun to be generated due to the mixing of, and this is a measure against the situation where an increase in the injection amount of the slime inhibitor is estimated.

When the injection of water treatment chemicals is controlled only by the polymer concentration, there is no problem because the polymer concentration is maintained at the reference value concentration even if the COD with respect to the polymer concentration in the circulating water is increased as described above. The detection of slime is delayed. However, by monitoring the COD together with the polymer concentration, even if the polymer concentration is maintained at the reference value concentration, the COD with respect to the polymer concentration in the circulating water is increased so that the occurrence of slime can be detected at an early stage. You can take corrective action.

[Countermeasure data D7]
In the countermeasure data D7, paying attention to the free residual chlorine concentration and the makeup water ammonium ion concentration, when the free residual chlorine concentration decreases, it is estimated that slime may be generated, and the circulating water system is estimated from the makeup water ammonium ion concentration. The amount of hypochlorous acid required for the test is obtained, and sodium hypochlorite is added.

When the injection of water treatment chemicals is controlled only by the free residual chlorine concentration, as described above, the free residual chlorine concentration does not increase even if the amount of sodium hypochlorite added is decreased. , The adjustment of free residual chlorine concentration is delayed, and the amount of slime generated increases. However, by monitoring the makeup water ammonium ion concentration together with the free residual chlorine concentration and obtaining the amount of hypochlorous acid necessary for the circulating water system from the makeup water ammonium ion concentration, an increase in the amount of slime generated can be prevented.

[Countermeasure data D8]
In the countermeasure data D8, focusing on the silica concentration and the magnesium hardness, when the silica concentration and the magnesium hardness are reduced, it is estimated that the scale is deposited with magnesium silicate in the water treatment facility 100, and the magnesium silicate scale inhibitor This is a measure against the situation where the reduction of the concentration factor due to the increase in the injection amount or the increase in the blow amount is estimated.

When the water treatment facility 100 is managed only by the silica concentration, as described above, if the silica concentration decreases, it is determined that the concentration factor has decreased, and measures are taken to increase the concentration factor by lowering the blow rate. In addition to not being able to detect the precipitation, there is a risk of worsening the scale adhesion. However, by monitoring the magnesium hardness together with the silica concentration, when the silica concentration and the magnesium hardness are lowered, the scale precipitation in the magnesium silicate can be detected at an early stage, and an appropriate countermeasure can be taken.

[Countermeasure data D9]
In the countermeasure data D9, paying attention to turbidity and COD, when turbidity and COD increase, it is estimated that slime may be generated in the water treatment facility 100, and an increase in the injection amount of the slime inhibitor is estimated. It will be a countermeasure for the situation.

When monitoring only the turbidity, take measures to increase the blow rate when the turbidity increases as described above, and not only the occurrence of slime is not detected, but also the concentration of the slime inhibitor in the system decreases, May exacerbate obstacles. However, by monitoring the COD together with the turbidity, the increase in COD with the turbidity can detect the occurrence of slime at an early stage and take appropriate measures.

The calculation unit 116 of the water quality management device 110 refers to the countermeasure data stored in the memory 118, and responds to the change in the water quality parameter when the change in the input water quality parameter matches the change in the water quality parameter in the countermeasure data. The display unit 114 displays the water treatment status and countermeasures to be performed. The user can take an appropriate measure for the water treatment facility 100 based on the countermeasure displayed on the display unit 114, and can suppress a failure occurring in the circulating water system.

The countermeasure data referred to by the calculation unit 116 may be selected by the user using the input unit 112. When countermeasure data is selected, an input screen for water quality parameters to be input is displayed on the display unit 114.

As described above, the water quality management apparatus 110 according to the present embodiment includes a plurality of water quality parameter item names, changes in the water quality parameters, estimated water treatment status in the water treatment facility 100, and measures to be taken on the water treatment facility 100. Is stored in the memory 118, and when two or more types of water quality parameters detected on-site by the analyzer 104 are input, the countermeasure data is referred to and water treatment corresponding to the input water quality parameters is stored. The situation and countermeasures are automatically displayed on the display unit 114. By using two or more types of water quality parameters, it is possible to detect the occurrence of a failure that cannot be determined (or overlooked) by changing only one type of water quality parameter, and promptly take appropriate measures for the water treatment apparatus 100. It can be executed and the trouble that occurs in the circulating water system can be suppressed.

Also, by using the water quality management device 110, the user can promptly confirm and execute appropriate measures at the site regardless of his / her discretion and experience level.

In the above embodiment, a plurality of analyzers 104 are used, but an analyzer capable of obtaining a plurality of water quality parameters may be used. Such an analyzer will be described with reference to FIGS.

5 and 6 are external perspective views of an analyzer capable of measuring a plurality of water quality parameters, and FIG. 7 is a block diagram of the analyzer. As shown in FIG. 7, the analyzer includes an absorbance measurement unit 1, an electrode measurement unit 2, an electrical conductivity measurement unit 3, an operation unit 4, a display unit 5, a calculation unit 6, and a memory 7. H.

As shown in FIGS. 5 and 6, the housing H is made of a synthetic resin case having a substantially rectangular parallelepiped shape, and an operation unit 4 and a display unit 5 made of a liquid crystal display or the like are provided on one half of the upper surface thereof. . The operation unit 4 includes buttons, switches, touch panels, and the like that are operated by the user.

On the other half side of the upper surface of the housing H, a cell installation portion 10 is provided in a concave step shape and is covered with a cover 11 that can be opened and closed. In addition, an arrangement part 21 for the sample water container 20 is provided on the other half side of the upper surface of the housing H, and a sensor installation board 15 capable of rotating in a standing direction is provided above the arrangement part 21. . The cover 11 and the sensor installation board 15 are rotatably attached to the housing H by hinges.

The cell installation unit 10 is provided with

insertion holes

13A, 13B, and 13C for the

absorbance measurement cells

12A, 12B, and 12C. In the housing H, a light emitting element, a spectroscope, and a light receiving element are provided so as to face each other with the insertion holes 12A to 12C interposed therebetween. The spectrometer may be omitted. The cells 12A to 12C are preliminarily sealed with a specified amount of coloring reagent. The coloring reagents in the cells 12A to 12C are different from each other.

The coloring reagent varies depending on the component to be measured. For example, when the component to be measured is silica, one containing molybdenum can be used, and when determining the acid consumption (pH 4.8), one containing bromophenol blue When the acid consumption (pH 8.3) is determined, one containing phenolphthalein can be used. When measuring sulfate ions, those containing barium chromate can be used.

Open the caps of the cells 12A to 12C, inject a specified amount of sample water into the cells 12A to 12C, close the cap, mix the sample water and the coloring reagent, and then insert the cells 12A to 12C into the insertion holes 13A to 13A It can be inserted into 13C and the absorbance can be measured. The absorbance measuring unit 1 is configured by the cells 12A to 12C, the light emitting elements, the spectroscope and the light receiving element, the drive circuit for each element, and the light receiving signal processing circuit.

The sensor installation board 15 can be turned up and down by a hinge so as to be able to take the standing state of FIG. 5 and the lying state of FIG. The sensor installation panel 15 includes

ion electrodes

16 and 17, a pH glass electrode 18 and a comparative electrode 23 that constitute the electrode measuring unit 2, and an electric conductivity meter 19 that constitutes the electric conductivity measuring unit 3. It is installed in a form in which the side protrudes downward from the lower surface of the sensor installation board 15 of the lodging device.

In this embodiment, the ion electrode 16 is a divalent cation selective electrode, and the ion electrode 17 is a calcium ion selective electrode.

A sample water container 20 is arranged below the sensor installation board 15 in a lying state, and when the sensor installation board 15 falls, the

ion electrodes

16 and 17, the pH glass electrode 18, the comparison electrode 23, and the electric conductivity meter. The lower end side of 19 is configured to be immersed in the sample water W (FIG. 5) in the container 20. The sample water container 20 is provided with a handle 20a, and the sample water container 20 can be taken in and out of the container arrangement portion 21 of the housing H by grasping the handle 20a. A protective cap for various electrodes can be stored in a space S adjacent to the container 20.

As the light emitting element of the absorbance measuring unit 1, an LED, a xenon flash lamp, a halogen lamp, or the like can be used. As the spectroscope, a filter such as an interference filter or a colored glass filter, a prism such as crystal or fused silica, or a diffraction grating such as a plane diffraction grating or a concave diffraction grating can be used. The light receiving element is, for example, a photodiode, and converts transmitted light from the sample into an electrical signal. The absorbance is obtained from the intensity of the transmitted light based on this electrical signal and the intensity of the incident light on the sample. The transmittance may be obtained instead of the absorbance.

A calibration curve is prepared in advance by measuring the absorbance of the standard solution of the measurement target component, and data of this calibration curve is stored in the memory 7. By referring to this calibration curve, the dissolved component concentration of the measurement target component in the sample water can be determined from the calculated absorbance. The calculation of the absorbance and the dissolved component concentration may be performed by the calculation unit (not shown) of the absorbance measurement unit 1 or the calculation unit 6.

The ion selective electrode and the comparative electrode constituting the electrode measuring unit 2 have a high degree of selectivity with respect to the measurement target ion, and generate a potential corresponding to the ion concentration (dissolved component concentration). The ion-selective electrode constitutes a battery by combining with a reference electrode, and its electromotive force (potential difference generated between both electrodes) E is measured by a potentiometer. When the electrode potential of the ion selective electrode is E _ind , the electrode potential of the comparison electrode is E _ref , and the potential difference between the sample water W and the comparison electrode is E _j , the electromotive force E is expressed by Equation 4 below.

E = E _ind −E _ref + E _j (Equation 4)

Here, E _ref is a constant value, and E _j can be ignored by using an appropriate salt bridge. Therefore, E is determined only by the value of E _ind , and the ion concentration to be measured can be expressed as an electromotive force of this battery. By previously obtaining a relationship (calibration curve) between the ion concentration and the interelectrode potential difference using a standard solution, the ion concentration to be measured in the sample can be obtained from the measured value of the potentiometer. For example, the total hardness (total hardness = calcium hardness + magnesium hardness) can be obtained by using the divalent cation selective electrode 16 and the comparison electrode 23. Moreover, calcium hardness can be calculated | required by using the calcium ion selective electrode 17 and the comparison electrode 23. FIG. The magnesium hardness can be determined from the difference between the total hardness and the calcium hardness. Calibration curve data is stored in the memory 7. The calculation of the measurement target ion concentration may be performed by the calculation unit (not shown) of the electrode measurement unit 2 or the calculation unit 6.

The pH glass electrode 18 and the comparative electrode 23 constituting the electrode measuring unit 2 measure the pH of the sample water W by a so-called glass electrode method. Specifically, the potential difference generated between the pH glass electrode 18 made of a special glass film responsive to the hydrogen ion activity and the comparison electrode 23 showing a constant potential regardless of pH is measured with a potentiometer. And calculate the pH.

The electric conductivity meter 19 constituting the electric conductivity measuring unit 3 obtains the electric conductivity of the sample water W by a so-called AC two-electrode method. Specifically, an AC voltage is applied between a pair of electrodes using an AC power source, the current flowing at this time is measured with an AC ammeter, the liquid resistance of the sample water W is obtained, and the electrical conductivity is calculated. Stainless steel or platinum is used for the electrode. The electric conductivity meter 19 includes a temperature sensor such as a resistance temperature detector.

The sample water W accommodated in the cells 12A to 12C and the sample water container 20 is circulating water or makeup water of a circulating cooling water system as shown in FIG.

The operation unit 4 of the analyzer performs switching setting between the circulating water mode and the makeup water mode. The values measured by the absorbance measuring unit 1, the electrode measuring unit 2, and the electrical conductivity measuring unit 3 when the circulating water mode is set are stored in the memory 7 as measured values of the circulating water. The values measured by the absorbance measurement unit 1, the electrode measurement unit 2, and the electrical conductivity measurement unit 3 when the makeup water mode is set are stored in the memory 7 as the measured value of makeup water.

The calculation unit 6 is an index indicating how many times the salt concentration in the circulating water is higher than that of the makeup water based on the measurement value when the circulation water mode is set and the measurement value when the makeup water mode is set. Calculate multiples. For example, for the same dissolved component, the concentration factor is calculated by dividing the dissolved component concentration measured when the circulating water mode is set by the dissolved component concentration measured when the makeup water mode is set. For example, the concentration factor is also calculated by dividing the electrical conductivity measured when the circulating water mode is set by the electrical conductivity measured when the makeup water mode is set.

This analyzer can acquire multiple concentration multiples. That is, the concentration multiple based on the dissolved component concentration obtained from each absorbance of the cells 12A to 12C, the concentration multiple based on the ion concentration obtained from the ion electrode measurement value, and the concentration multiple based on the electrical conductivity are calculated.

The display unit 5 displays a plurality of concentration multiples calculated by the calculation unit 6 and measurement values obtained by the respective measurement units. The memory 7 stores measurement values by each measurement unit, calibration curve data, a plurality of concentration multiples calculated by the calculation unit 6, and the like. The calculation unit 6 may obtain a Langeria index (saturation index), a Risner index, and a Mattson ratio.

The user inputs a plurality of water quality parameters, concentration multiples, and the like displayed on the display unit 5 to the water quality management device 110.

The analyzer shown in FIGS. 5 to 7 may have the function of the water quality management device 110. That is, countermeasure data as shown in FIG. 4 is stored in the memory 7, and the calculation unit 6 refers to the countermeasure data stored in the memory 7 and determines the water treatment status and countermeasures corresponding to the measurement values by each measurement unit. Displayed automatically on the display unit 5. Thereby, it is possible to analyze a plurality of water quality parameters, judge the water treatment status in the water treatment facility 100, and present measures to be taken to the water treatment facility 100 with one analyzer at the site.

As shown in FIG. 8, an external server 120 that determines the water treatment status in the water treatment facility 100 and selects measures to be taken on the water treatment facility 100, and the analysis result of the analyzer 104 are wired / wirelessly transmitted to the water quality management system. You may provide the data communication apparatus 130 which transmits to the external server 120 via a network. When the external server 120 includes a database of countermeasure data and receives the analysis result of the analyzer 104 from the data communication device 130, the external server 120 notifies the data communication device 130 of the water treatment status and the countermeasure corresponding to the analysis result. A portable terminal such as a smartphone can be used as the data communication device 130, and the water treatment status and countermeasures notified from the external server 120 are displayed on the display unit. As described above, the external server 120 may have a part of the function of the water quality management device 110. If the analysis of makeup water is not performed on site, the latest past data may be cited from the cloud and used.

The analyzer shown in FIGS. 5 to 7 may be provided with a communication unit, and the communication unit may extract the measurement value obtained by each measurement unit from the memory 7 and output it to the external server 120. When the external server 120 receives the measurement value from the analyzer, the external server 120 notifies the analyzer of the water treatment status and the countermeasure corresponding to the measurement value. The analyzer displays the notified water treatment status and countermeasures on the display unit 5. When the user confirms the countermeasure displayed on the display unit 5 at the site and promptly executes an appropriate treatment for the water treatment apparatus 100, a failure occurring in the circulating water system can be suppressed.

Hereinafter, the present invention will be described more specifically with reference to examples.

[Example 1]
The apparatus shown in FIG. 1 continuously analyzes the concentration of the polymer mainly composed of acrylic acid as a scale inhibitor in the circulating water of the cooling water system of the pilot plant (hereinafter referred to as the first plant). The chemical injection amount was automatically controlled so that In this system, TOC was measured in batches using a portable analyzer. In addition, from the 26th day after the start of measurement on the side of the first plant, assuming the handling of the organic solvent in the vicinity, a part of the exhaust duct of the organic solvent was pulled to the side of the cooling tower, and the operation was continued. The measurement results are shown in Table 1.

As shown in Table 1, in the first plant, an increase in TOC estimated to be derived from the organic solvent flowing into the circulating water system from the atmosphere after 28 days from the start of measurement was found. Here, when the chemical injection amount is controlled using only the TOC as an index instead of the polymer concentration, the polymer concentration in the circulating water system is reduced by decreasing the chemical injection amount as the TOC increases. It is estimated that the risk of scale adhesion was significantly increased.

In this plant, in addition to the TOC, the polymer concentration was measured at the same time. Therefore, it was possible to maintain the appropriate chemical injection amount without making a mistaken decision to reduce the chemical injection amount.

[Example 2]
With the apparatus shown in FIG. 1, the anti-slime agent mainly composed of monochlororosfaminic acid is obtained based on the ORP measurement value in the circulating water of the cooling water system of the pilot plant (hereinafter referred to as the second plant) different from the first plant. The amount of water treatment chemicals contained was controlled. In this system, the pH was measured in batches using a portable analyzer. In the second plant, hydrochloric acid was added to the cooling water system simulating a leak from the process 4 days after the start of measurement. The measurement results are shown in Table 2.

As shown in Table 2, in the second plant, since hydrochloric acid was added to simulate the mixing of hydrochloric acid from the process after 5 days, the pH dropped rapidly. Here, when the control for increasing the amount of chemical injection is performed using only ORP as an index, it is not noticed that hydrochloric acid is mixed in, and in addition to lowering the pH in the circulating water system, the excessive addition of an oxidizing agent causes the piping in the system and It was found that the risk of corrosion of the heat exchanger was significantly increased.

In this plant, in addition to ORP, by measuring pH simultaneously, it was possible to quickly detect hydrochloric acid contamination simulating process leak.

[Example 3]
With the apparatus shown in FIG. 1, residual chlorine and silica were measured for circulating water and make-up water in a circulating water system installed in a pilot plant (hereinafter referred to as a third plant) different from the first and second plants. In this plant, a water treatment chemical containing a slime inhibitor mainly composed of monochlororosfamic acid was injected with a timer. Assuming the drought time in summer, the turbidity of the actual cooling water was batched daily. Table 3 shows each analysis result and the change over time of the concentration factor calculated from silica.

As shown in Table 3, in the third plant, the concentration factor calculated from the silica concentration changed from 5.1 to 5.3 times, and the chemical injection amount was injected at the same set value during the period. The total residual chlorine concentration decreased over time. On the 22nd day from the start of measurement, the condition of the total residual chlorine concentration of 5mgCL / L), which is the control value of this plant, was satisfied, but considering the decreasing trend in the 1st to 22nd days, the total residual chlorine concentration was Since it was predicted to be below the control value, a measure to increase the amount of chemical injection was presented.

Here, in another circulating water system branched from this circulating water system, the stroke of the chemical injection pump was increased in accordance with the proposed countermeasures, and the total residual chlorine concentration was adjusted to be maintained at 5 mg CL / L or more. The cooling tower pit 43 days after the start of the test is kept clean, and the attached slime sensor (current is supplied periodically to the resistor built in the sensor to generate heat, and the heating temperature and non-heating temperature are set. A sensor that measures with a temperature sensor.If slime adheres to the sensor, heat transfer is hindered, and the temperature difference between the heating temperature and the non-heating temperature increases, so the tendency of slime adhesion is detected). It was confirmed that the circulating water system including the heat exchanger was maintained clean.

On the other hand, in the circulating water system that continued operation with the pump stroke maintained as it is, the total residual chlorine concentration reached 3.5 mgCL / L after 29 days, which was below the control value of 5 mgCL / L. However, after 36 days, it was still below the control value of 1.4 mg CL / L, and when the pump stroke was further increased, it recovered to the control value of 5.3 mg CL / L after 43 days. At this time, algae were observed in the cooling tower pit, and the slime sensor temperature was 0.4 ° C. (region of slightly poor heat transfer efficiency), and a suitable water treatment could not be performed.

As described above, it was confirmed that the control value can be easily maintained and the heat transfer efficiency can be maintained by changing the dose amount in advance using the past tendency.

[Example 4]
With the apparatus shown in FIG. 1, the circulating water and make-up water of the circulating water system installed in a pilot plant (hereinafter referred to as the fourth plant) different from the first to third plants is batch-measured by a portable analyzer. The chemical concentration and the silica concentration were measured. Further, the concentration factor was calculated from the measured silica concentration. The measurement results and calculation results are shown in Table 4 below. In this plant, the cooling water chemicals containing alkali were injected into the timer.

As shown in Table 4, in the 4th plant, the pH of the circulating water is 9.5 and the copper material is corroded, and the amount of injected chemical is 750 mg / L, which is compared with the target value of 300 mg / L. Was significantly higher. Judging only from these two items, it is highly possible to extend the setting interval of chemical injection and increase the blow rate for the purpose of reducing the chemical concentration in the system and lowering the pH. It was found that the circulating water was not concentrated from the silica concentration. Therefore, the water quality management device determines that the load on the cooling tower is low and only chemicals are continuously being injected, and blows the water in the system and if the cooling tower is in a stopped state such as in winter, the cooling water It was proposed as a measure to remove and store in dry.

[Example 5]
With the apparatus shown in FIG. 1, the electrical conductivity, calcium hardness, and acid consumption of circulating water and make-up water in the circulating water system installed in a pilot plant (hereinafter referred to as fifth plant) different from the first to fourth plants. (PH 4.8) and silica concentration were measured, and the concentration factor was calculated from each measured value. The measurement results are shown in Table 5 below.

In the fifth plant, the concentration factor calculated from the electrical conductivity (5.5 times) was higher than the concentration factor calculated from the silica concentration (5.2 times). This is because there was an increase in electrical conductivity derived from chemicals, and the current concentration factor was determined to be 5.2 times.

The concentration factor calculated from the silica concentration and the electric conductivity was 5.2 times or more, whereas the concentration factor calculated from the calcium hardness and the acid consumption (pH 4.8) was 3.7 to 3.8 times. It was significantly lower. The water quality management device determined that calcium carbonate component and acid consumption (pH 4.8) component reacted in the circulating water system and precipitated calcium carbonate, and suggested measures to promote the operation to lower the concentration factor. .

Here, in another circulating water system branched from this circulating water system, according to the proposed measures, the amount of blow was increased so that the concentration factor of each water quality item was 3.8 times, and the water quality shown in Table 6 below was maintained. . As a result of an open inspection one month later, no adhesion of scales mainly composed of calcium carbonate to the heat exchanger was observed.

On the other hand, as a result of an open inspection of the circulating water system in which each water quality item continued to operate with the values shown in Table 5 after one month, adhesion of scales mainly composed of calcium carbonate to the heat exchanger was observed.

Although the present invention has been described in detail using specific embodiments, it will be apparent to those skilled in the art that various modifications can be made without departing from the spirit and scope of the invention.
This application is based on Japanese Patent Application No. 2014-086544 filed on April 18, 2014, which is incorporated by reference in its entirety.

Claims

An input unit for inputting a plurality of water quality parameters measured for sample water collected from a water treatment facility;
A storage unit for storing countermeasure data combining a plurality of water quality parameter changes and a water treatment status in the water treatment facility;
A calculation unit that refers to the countermeasure data and selects a water treatment status corresponding to the plurality of input water quality parameters;
A display unit for displaying the water treatment status selected by the calculation unit;
A water quality management device.
The countermeasure data is a combination of changes in a plurality of water quality parameters, water treatment status in the water treatment facility, and measures to be applied to the water treatment facility,
The calculation unit selects measures corresponding to the plurality of input water quality parameters,
The water quality management device according to claim 1, wherein the display unit displays a countermeasure selected by the calculation unit.
The storage unit stores water quality parameters input via the input unit,
The water quality management device according to claim 2, wherein the calculation unit selects a water treatment situation or a measure using a trend including past water quality parameters stored in the storage unit.
A plurality of water quality measuring devices for measuring a plurality of water quality parameters of the sample water;
The said calculating part selects the water treatment condition corresponding to the several water quality parameter measured with the said several water quality measuring device with reference to the said countermeasure data, The any one of Claim 1 thru | or 3 characterized by the above-mentioned. Water quality management equipment.
The water quality measuring instrument comprises at least two of an optical measuring instrument for measuring transmittance or absorbance, one or two ion electrodes, and an electric conductivity meter. 4. The water quality management device according to 4.
A data communication device having an input unit for inputting a plurality of water quality parameters measured for sample water collected from a water treatment facility, a communication unit for transmitting the plurality of input water quality parameters, and a display unit;
A data storage device that stores countermeasure data in which a plurality of water quality parameter changes, a water treatment status in the water treatment facility, and measures to be applied to the water treatment facility are combined; A server device that selects a water treatment status and measures corresponding to a plurality of water quality parameters received from the server, and notifies the data communication device of the selected water treatment status and measures;
With
The said data communication apparatus displays the water treatment status and countermeasure notified from the said server apparatus on the said display part, The water quality management system characterized by the above-mentioned.
The water quality management system according to claim 6, wherein the data communication device is provided in an analyzer having a plurality of water quality measuring devices for measuring a plurality of water quality parameters of sample water.
Using one or more analyzers, measure multiple water quality parameters for the water collected from the water treatment facility,
A water quality management device that stores countermeasure data combining a plurality of water quality parameter changes, a water treatment status in the water treatment facility, and a measure to be applied to the water treatment facility, refers to the measure data, and measures the measured water quality Select the water treatment status and measures corresponding to the parameters,
A water quality management method, wherein a display unit displays the selected water treatment status and countermeasures.
pH, electrical conductivity, chloride ion concentration, sulfate ion concentration, acid consumption (pH 4.8), acid consumption (pH 8.3), magnesium hardness, calcium hardness, silica concentration, iron concentration, copper concentration, ammonium ion Two or more selected from the group consisting of concentration, residual chlorine concentration, redox potential, TOC (total organic carbon), COD (chemical oxygen demand), polymer concentration, total phosphoric acid concentration, zinc concentration, and turbidity The water quality management method according to claim 8, wherein a water quality parameter is measured.