JP4973977B2 - Water quality measurement system - Google Patents

Description

  The present invention relates to a water quality measurement system such as water turbidity and hardness.

  For example, a water treatment line is provided in a water supply line to equipment such as a boiler in order to supply water with a predetermined water quality, but whether or not a predetermined water quality is obtained during passage of water to the water treatment equipment. In order to confirm this, a water quality measuring device may be provided in the water supply line.

Known examples of the water quality measuring device include a turbidity measuring device and a hardness measuring device (see, for example, Patent Documents 1 and 2). For example, the water supply line to the boiler is provided with a soft water device that removes the hardness in the water to be treated with an ion exchange resin or the like in order to prevent the scale from adhering to the boiler can due to the hardness in the water being supplied. However, on the downstream side of the water softener, the hardness measuring device is provided in order to detect a hardness leak.
JP 2004-170196 A JP-A-9-329581

  Conventionally, the measurement operation in the water quality measuring apparatus is often performed at a predetermined measurement interval based on a built-in timer. In this case, measurement is performed regardless of the presence or absence of water flow to the water treatment device. Therefore, even when the water flow is not required to be measured, the measurement operation is performed when the set measurement time is reached, and useless measurement is performed.

  In some cases, it is not preferable to perform measurement while water flow is stopped. For example, in the water softener, a hardness component may flow out of the ion exchange resin while water flow is stopped, and the hardness on the downstream side of the water softener may increase. Therefore, when the measurement is performed while the water flow is stopped, the measured value becomes high even though the hardness leak does not occur, and there is a concern that the hardness leak is determined.

  Furthermore, by performing water quality measurement at a time other than the preset measurement timing, an abnormality in the treated water quality may be detected early. For example, in the water softener, before the ion exchange resin loses the ion exchange capacity and becomes a breakthrough state, a regeneration operation is performed in which salt water is supplied to the ion exchange resin as a regenerant to recover the ion exchange capacity. It has been broken. In this regeneration operation, when the ion exchange capacity of the ion exchange resin does not recover normally, treated water with a predetermined water quality cannot be obtained. Therefore, in addition to the preset measurement timing, if the measurement by the hardness measuring device is performed after the reproduction operation, a hardness leak due to reproduction failure can be detected at an early stage. Thus, if water quality measurement can be performed according to the operation status of the water treatment equipment, an abnormality in the treated water quality can be detected early.

  The present invention has been made in view of such circumstances, and a first problem to be solved is to perform water quality measurement only during water flow to a water treatment device.

  In addition, a second problem to be solved by the present invention is to perform water quality measurement at an appropriate timing in order to detect an abnormality in the quality of treated water at an early stage.

This invention was made in order to solve the said subject, and the invention of Claim 1 is connected with the upstream and / or downstream of a water treatment apparatus, and is set from the preset measurement interval time and the exterior. And a measurement control device connected to the water treatment device and the water treatment device, the measurement control device being connected to the water treatment device. Based on the presence / absence of water, a measurement permission signal or a measurement prohibition signal is output to the water quality measurement device, and the water quality measurement is performed based on operation information of the water treatment equipment and presence / absence of water flow to the water treatment equipment. A measurement command signal is output to the apparatus, and the measurement command signal is output at an interval shorter than the measurement interval time .

Invention of Claim 2 is the water quality measurement system of Claim 1, Comprising : The said water treatment apparatus removes impurities, such as an undissolved substance in to-be-processed water, with a filter medium, or to-be-processed water Is a soft water device that removes the hardness of the water treatment device by using an ion exchange resin, and the operation information of the water treatment device is a regeneration operation signal output from the water treatment device during the regeneration operation of the water treatment device, or the water treatment It is a playback operation start time set in the device .
Moreover, invention of Claim 3 is a water quality measurement system of Claim 1, Comprising: The flowmeter provided in the downstream of the said water treatment apparatus is provided, The said water treatment apparatus is a to-be-processed water. It is a filtration device that removes impurities such as non-dissolved material with a filter medium, or a soft water device that removes hardness in treated water with an ion exchange resin, and the operation information of the water treatment device is detected by the flow meter, It is the water sampling amount data for every unit time memorize | stored in the water treatment apparatus or the said measurement control apparatus, It is characterized by the above-mentioned.

Furthermore, the invention according to claim 4 is provided with a contact output unit in the measurement control device according to any one of claims 1 to 3, and the contact quality of the contact point of the contact output unit is adjusted to the water quality measurement device. Each output of the measurement permission signal, the measurement prohibition signal, and the measurement command signal is switched.

According to the first aspect of the present invention, when the water treatment apparatus is not passing water, a measurement prohibition signal is output from the measurement control device to the measurement device, and the measurement prohibition signal is input. In some cases, the measurement device does not perform a measurement operation. On the other hand, when water is passed to the water treatment device, a measurement permission signal is output from the measurement control device to the measurement device. When the measurement permission signal is input, the measurement device The measurement operation is performed at every set measurement interval time. Thereby, when the water flow to the water treatment device is stopped, the water quality measurement is not performed, and the water quality measurement can always be performed only during the water flow.
Moreover, the water quality measurement according to the operation condition of the said water treatment apparatus can be performed, and the abnormality of the quality of treated water can be discovered at an early stage by this.

According to the invention described in claim 2, the water treatment of the water treatment device is performed by performing a measurement operation at an interval shorter than the predetermined interval time with reference to the regeneration operation signal from the water treatment device. It is possible to detect deterioration in the quality of treated water due to the fact that the capacity has not recovered. In addition, referring to the regeneration operation start time of the water treatment device, by performing measurement operation at an interval shorter than the predetermined interval time, the treated water due to exceeding the water treatment capacity of the water treatment device Water quality deterioration can be detected.
According to the invention described in claim 3, the quality of treated water is increased by increasing the amount of treated water by performing a measurement operation at intervals shorter than the predetermined interval time with reference to the amount of water collected from the water treatment device. It can be determined whether or not it has deteriorated.

According to the fourth aspect of the present invention, the outputs of the measurement permission signal, the measurement prohibition signal, and the measurement command signal can be easily switched by the contact opening / closing pattern of the contact output unit.

Next, embodiments of the present invention will be described in detail with reference to the drawings.
(First embodiment)
First, a first embodiment of a water quality measurement system according to the present invention will be described. FIG. 1 is a schematic explanatory view showing a configuration of a first embodiment of a water quality measurement system according to the present invention provided in a water treatment system, and FIG. 2 is a contact output unit in the water quality measurement system of the first embodiment. FIG. 3 is a schematic configuration diagram when the contact output portion is in the open state in the water quality measurement system of the first embodiment, and FIG. 4 is a measurement of the water quality measurement system of the first embodiment. It is explanatory drawing of operation | movement.

  The water quality measurement system 1 is provided in a water treatment system 4 in which a water treatment device 3 is provided in a water supply line 2 to a device (not shown). The water treatment device 3 is, for example, a filtration device that removes impurities such as non-dissolved substances in the water to be treated with a filter medium, or a water softener that removes the hardness in the water to be treated with an ion exchange resin. A pump 5 is provided on the upstream side of the water treatment device 3 in order to supply water to be treated to the water treatment device 3.

  The water quality measurement system 1 includes a flow switch 6, a water quality measurement device 7, and a measurement control device 8. The flow switch 6 and the water quality measuring device 7 are connected to the water quality measuring device 7 through a signal line 9, respectively.

  The flow switch 6 and the water quality measuring device 7 are respectively connected to the water supply line 2 on the downstream side of the water treatment device 3. The flow switch 6 detects the presence / absence of water flow to the water treatment device 3. The water quality measuring device 7 measures turbidity or chromaticity when the water treatment device 3 is, for example, a filtration device, and measures hardness when it is a soft water device.

  The water quality measurement device 7 performs a measurement operation based on a preset measurement interval time and an instruction signal from the measurement control device 8, specifically a measurement permission signal S1 (see FIG. 4) described later. It has become. The water quality measuring device 7 includes a timer (not shown) that measures the measurement interval time.

  2 and 3, the measurement control device 8 includes a contact output unit 10, and the measurement permission signal S <b> 1 or the measurement permission signal S <b> 1 is sent to the water quality measurement device 7 according to a contact opening / closing pattern of the contact output unit 10. A measurement inhibition signal S2 (see FIG. 4) is output. Specifically, as shown in FIG. 2, when the contact of the contact output unit 10 is closed, the measurement prohibition signal S2 is output to the water quality measuring device 7, while, as shown in FIG. When the contact of the contact output unit 10 is open, the measurement permission signal S1 is output to the water quality measuring device 7. The output of the measurement permission signal S1 or the measurement prohibition signal S2 from the measurement control device 8 is performed based on the presence / absence of water flow to the water treatment device 3, that is, the signal from the flow switch 6. ing.

  Now, a measurement control method of the water quality measurement system 1 will be described. In the water quality measurement system 1, the flow switch 6 detects the presence or absence of water flow to the water treatment device 3. Then, the measurement control device 8 outputs the measurement permission signal S1 (see FIG. 4) or the measurement prohibition signal S2 (see FIG. 4) to the water quality measurement device 7 based on the detection result of the flow switch 6. . Specifically, when water is not being supplied to the water treatment device 3, the measurement control device 8 closes the contact output unit 10 and sends the measurement prohibition signal S <b> 2 to the water quality measurement device 7. Output. On the other hand, when water is being supplied to the water treatment device 3, the measurement control device 8 opens the contact output unit 10 and outputs the measurement permission signal S <b> 1 to the water quality measurement device 7. .

  The measurement operation in the water quality measuring device 7 will be described with reference to FIG. When the measurement permission signal S1 is input from the measurement control device 8, the water quality measurement device 7 performs a measurement operation at every predetermined interval time T1 measured by the timer (not shown) (M2 in FIG. 4). And M3). On the other hand, the water quality measurement device 7 does not perform the measurement operation when the measurement inhibition signal S2 is input from the measurement control device 8 (M1 and M4 in FIG. 4).

  According to the water quality measurement system 1, water quality measurement is not performed when water flow to the water treatment device 3 is stopped, and water quality measurement can always be performed only during water flow. As a result, wasteful measurement while water flow is stopped is not performed. For example, when a reagent is used for water quality measurement, it is possible to obtain an effect of preventing waste of the reagent. In addition, when the water treatment device 3 is a soft water device, it is not possible to detect an increase in hardness during the stoppage of water flow, and therefore it is possible to always make a correct determination as to the quality of the treated water.

(Second embodiment)
Next, a second embodiment of the water quality measurement system according to the present invention will be described. FIG. 5 is a schematic explanatory view showing the configuration of the second embodiment of the water quality measurement system according to the present invention provided in the water treatment system, and FIG. 6 shows the schematic configuration of the water quality measurement system of the second embodiment. FIG. 7 is an explanatory diagram when the measurement command signal is output from the contact output unit, and FIG. 7 is an explanatory diagram of the measurement operation of the water quality measurement system of the second embodiment. In the figure, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  In the water quality measurement system 20 of the second embodiment, a flow meter 21 is provided on the downstream side of the water treatment device 3 in order to detect the presence or absence of water flow to the water treatment device 3. In addition to the water quality measuring device 7, the measurement control device 8 is connected to the flow meter 21 and the water treatment device 3 via the signal line 9.

  Operation information of the water treatment device 3 is input to the measurement control device 8 through the signal line 9. In addition to the measurement permission signal S1 (refer to FIG. 7) and the measurement prohibition signal S2 (refer to FIG. 7), the measurement control device 8 is configured such that when the contact output unit 10 is in an open state, as shown in FIG. That is, when water is passed to the water treatment device 3 and the measurement permission signal S1 is output, based on the operation information of the water treatment device 3, every predetermined interval time T2 (see FIG. 7). For example, the contact output unit 10 is opened and closed for 1 to 3 seconds, and the measurement command signal S3 (see FIG. 7) is output to the water quality measuring device 7.

  Here, as the operation information of the water treatment device 3 referred to for outputting the measurement command signal S3, when the water treatment device 3 is a filtration device or a soft water device, impurities such as non-dissolved substances due to the filter medium During the regeneration operation for recovering the removal capability of the water and the hardness removal capability by the ion exchange resin, the regeneration operation signal output from the water treatment device 3 and the regeneration operation set in the water treatment device 3 You can list the start time. Further, as the operation information of the water treatment device 3, water sampling amount data for each unit time detected by the flow meter 21 and stored in the water treatment device 3 or the measurement control device 8 can be exemplified.

  Now, in the said water quality measurement system 20, the said measurement control apparatus 8 is the same as that of said 1st embodiment based on the presence or absence of the water flow to the said water treatment apparatus 3, specifically, the detection result of the said flowmeter 21. In addition, the measurement output signal S1 (see FIG. 7) or the measurement inhibition signal S2 (see FIG. 7) is output from the contact output unit 10 to the water quality measuring device 7.

  Then, in the water quality measuring device 7, as shown in FIG. 7, when the measurement permission signal S1 is input from the measurement control device 8, as in the first embodiment, the timer is measured by the timer. The measurement operation is performed every predetermined interval time T1 (M12 and M14 in FIG. 7). On the other hand, the water quality measurement device 7 does not perform the measurement operation when the measurement inhibition signal S2 is input from the measurement control device 8 (M10 and M15 in FIG. 7).

  In the water quality measuring device 7, when the measurement command signal S3 is input from the measurement control device 8 while the measurement permission signal S1 is input, the measurement operation is performed (M11 to M14 in FIG. 7). M12 and M14 overlap with the predetermined interval time T1). The measurement control device 8 outputs the measurement command signal S3 for each predetermined interval time T2 shorter than the predetermined interval time T1, based on the operation information of the water treatment device 3.

  The output of the measurement command signal S3 by the measurement control device 8 will be described in more detail. For example, when the measurement command signal S3 is output with reference to the regeneration operation signal of the filtration device or the soft water device as the water treatment device 3, the measurement control is performed for a predetermined time immediately after the regeneration operation is completed. The device 8 outputs the measurement command signal S3 at every predetermined interval time T2. Further, when the measurement command signal S3 is output with reference to the regeneration operation start time of the filtration device or the water softener as the water treatment device 3, the predetermined interval time before the regeneration operation is started. The measurement command signal S3 is output every T2. Further, when the measurement command signal S3 is output with reference to the water sampling amount of the water treatment device 3, the measurement command signal S3 is output in a time zone in which the water sampling amount is larger than the average. Here, the predetermined interval time T <b> 2 may be set to a different value for each operation information of the water treatment device 3.

  According to the water quality measurement system 20, the measurement operation is performed at a time interval shorter than the predetermined interval time T <b> 1 for a predetermined time immediately after the end of the regenerating operation with reference to the signal during the regenerating operation from the water treatment device 3. Accordingly, it is possible to detect the deterioration of the quality of the treated water due to the fact that the water treatment capacity of the water treatment device 3 has not recovered. Further, by referring to the regeneration operation start time of the water treatment device 3 and performing a measurement operation at an interval shorter than the predetermined interval time T1 for a predetermined time before the start of the regeneration operation, the water treatment device 3 It is possible to detect a deterioration in the quality of treated water due to exceeding the water treatment capacity. Furthermore, with reference to the amount of water collected from the water treatment device 3, the measurement operation is performed at intervals shorter than the predetermined interval time T1 in a time zone where the amount of water collected is greater than the average, thereby increasing the amount of treated water. It can be judged whether or not the water quality has deteriorated. Therefore, by performing the water quality measurement according to the operation status of the water treatment device 3 in this way, it is possible to detect an abnormality in the quality of the treated water at an early stage.

  As mentioned above, although this invention was demonstrated by each said embodiment, this invention is not restricted to each said embodiment, of course. For example, the water quality measuring device 7 may be connected to the upstream side of the water treatment device 3, or may be connected to the upstream side and the downstream side of the water treatment device 3. Furthermore, the presence / absence of water flow to the water treatment device 3 is not limited to that detected by the flow switch 6 or the flow meter 21, and for example, an on / off signal of the pump 5 or a downstream side of the water treatment device 3. When a treated water tank (not shown) is provided, detection may be performed based on a water level detection signal from the treated water tank. Furthermore, information input of the measurement permission signal S1, the measurement prohibition signal S2, and the measurement command signal S3 can be performed using appropriate communication means.

It is a schematic explanatory drawing which shows the structure of 1st embodiment of the water quality measurement system which concerns on this invention provided in the water treatment system. In the water quality measurement system of a first embodiment, it is a schematic block diagram when a contact output part is a closed state. In the water quality measurement system of a first embodiment, it is a schematic block diagram when a contact output part is an open state. It is explanatory drawing of measurement operation | movement of the water quality measurement system of 1st embodiment. It is a schematic explanatory drawing which shows the structure of 2nd embodiment of the water quality measurement system which concerns on this invention provided in the water treatment system. It is explanatory drawing when the schematic structure of the water quality measurement system of 2nd embodiment is shown and a measurement command signal is output from a contact output part. It is explanatory drawing of measurement operation | movement of the water quality measurement system of 2nd embodiment.

Explanation of symbols

1,20 Water quality measurement system 3 Water treatment equipment 7 Water quality measurement device 8 Measurement control device 10 Contact output unit

Claims (4)

A water quality measuring device connected to the upstream side and / or downstream side of the water treatment device and performing a measurement operation based on a preset measurement interval time and an external instruction signal;
This water quality measuring device and a measurement control device connected to the water treatment equipment,
The measurement control device outputs a measurement permission signal or a measurement prohibition signal to the water quality measurement device based on the presence / absence of water flow to the water treatment device, and the operation information of the water treatment device and the water treatment device A water quality measurement system that outputs a measurement command signal to the water quality measurement device based on the presence or absence of water flow to the water and outputs the measurement command signal at an interval shorter than the measurement interval time . The water treatment device is a filtration device that removes impurities such as non-dissolved substances in the treated water with a filter medium, or a soft water device that removes the hardness content in the treated water with an ion exchange resin,
The operation information of the water treatment device is a regeneration operation signal output from the water treatment device during the regeneration operation of the water treatment device, or a regeneration operation start time set in the water treatment device. The water quality measurement system according to claim 1. A flow meter provided on the downstream side of the water treatment device,
The water treatment device is a filtration device that removes impurities such as non-dissolved substances in the treated water with a filter medium, or a soft water device that removes the hardness content in the treated water with an ion exchange resin,
Operation information of the water treatment device, said detected by the flow meter, the water quality according to claim 1, characterized in that the adopted water data for each of the water treatment device or the measurement control unit in the stored unit time Measuring system. A contact output unit is provided in the measurement control device,
The output of the measurement permission signal, the measurement inhibition signal, and the measurement command signal to the water quality measuring device is switched according to the contact opening / closing pattern of the contact output unit. The water quality measurement system described .

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