JP3176762B2 - Cleaning and maintenance system for sample water sampling equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sample water sampling device in a water quality control device for a boiler plant such as a power plant, and more particularly, to cleaning and analysis of an ion exchange resin device provided in the sample water sampling device. The present invention relates to a cleaning and maintenance system for automatically performing measurement operation maintenance of a meter.

[0002]

2. Description of the Related Art In general, as shown in FIG. 2, a sample water sampling device in a boiler plant includes a sample water sampling means 10, a pressure adjusting head vessel 12, and if necessary, a sample water cooling means 14 and a pressure reducing means 16. And a sample water analysis system 36 having an ion exchange resin device 26, a flow meter 28, a thermometer 30 and an analyzer 32 via a flow control valve 38. .

[0003] That is, the sample water collected from a required portion of the boiler plant through the sample water collecting means 10 is monitored by the flow meter 28 and the thermometer 30 to monitor the sample water.
Through the cooling means 14, the pressure reducing means 16, the head vessel 12, the flow control valve 38 and the ion exchange resin device 26,
The temperature, pressure, flow rate and water quality are adjusted to predetermined conditions, and are then introduced into the analyzer 32. In such a configuration, the ion-exchange resin device 26 needs to be appropriately cleaned for regeneration in a boiler plant, for example, when the seawater for cooling leaks and the sample water is contaminated. The analyzer 30 is configured to operate only when the cell portion is immersed or moistened in water such as sample water.

In the drawings, reference numeral 18 denotes a stop valve, reference numeral 22 denotes a water quality abnormality detector provided in the overflow pipe 20 of the head vessel 12 as required, and reference numeral 34 denotes air. The valve removal is shown.

[0005]

However, the conventional sample water sampling apparatus has the following drawbacks.

That is, as described above, in this kind of sample water collecting apparatus, the ion exchange resin apparatus needs washing for regeneration as appropriate, and the analyzer operates only when it is wet. It is configured as follows. However, in the conventional sample water sampling apparatus, a large amount of work and time are required as described below for the washing and the moisturizing, and therefore, especially in relation to the recent use of nuclear power and energy saving, etc. Since the power plant is frequently started / stopped, there has been a strong demand for reducing the amount of work and shortening the work time, that is, improving the start-up response of the boiler plant.

That is, in the conventional sample water collecting apparatus, first, in the cleaning of the ion-exchange resin apparatus 26, the ion-exchange resin is taken out of the apparatus into another container, washed, and then transferred to the apparatus again. It was done by. Therefore, it is clear that a large amount of work and time are required for cleaning, and there is a problem that the ion exchange resin is spilled and lost at the time of the transfer.

Next, in order to achieve the wet keeping of the cell portion of the analyzer 32, an operator removes the cell portion from the analyzer while the boiler plant is stopped and immerses the cell portion in pure water or the like. It is necessary to take countermeasures such as mounting it on the analyzer again at startup. However, it is clear that this operation is extremely complicated and takes a lot of time. On the other hand, if the above countermeasure is omitted, it takes a considerable amount of time until the cell portion is immersed and wet in a predetermined state by the sample water, that is, until a stable measurement result is obtained from the analyzer. Obviously, the start-up of the boiler plant is delayed.

SUMMARY OF THE INVENTION An object of the present invention is to provide a cleaning and maintenance system for a sample water sampling apparatus that can automatically perform cleaning of an ion exchange resin apparatus and measurement and maintenance of an analyzer.

[0010]

In order to achieve the above object, a cleaning and maintenance system for a sample water sampling apparatus according to the present invention comprises a sample water sampling means, a head vessel for adjusting pressure, and, if necessary, a sample water sampling apparatus. A sample water supply system having a cooling means and a decompression means, and a sample water analysis system having an ion exchange resin device and a flow meter, a thermometer and a sample water analysis system having an analyzer via a flow control valve; A water branch system for washing / maintenance provided with a branch automatic opening / closing valve is connected to the connection portion, and a main automatic opening / closing valve is provided on the sample water supply system side in the connection portion, and the branch and main automatic opening / closing valves are linked. Thereby, cleaning of the ion exchange resin apparatus and measurement operation maintenance of the analyzer are automatically performed.

In this case, the cleaning water of the cleaning / maintenance water branch system may be pure water, and the maintenance water may be dummy water and / or sample water from another sample water sampling device.

[0012]

The cleaning of the ion exchange resin apparatus and the maintenance of the measurement operation of the analyzer, that is, the maintenance of the wetness of the analyzer cell section while the boiler plant is stopped, are performed by closing the sample water supply system by interlocking the branch and main automatic open / close valves. At the same time, by opening the branch water system, pure water or dummy water can be introduced into the sample water analysis system, and this can be achieved automatically.

[0013]

Next, cleaning and cleaning of the sample water sampling apparatus according to the present invention will be described.
An embodiment of the maintenance system will be described in detail below with reference to the accompanying drawings. For convenience of explanation, the same components as those of the conventional structure shown in FIG.
Detailed description is omitted.

In FIG. 1, the overall configuration of the sample water sampling apparatus according to the present invention is basically the same as the configuration shown in FIG. In other words, if the description is repeated, but will be briefly described again, the sample water collected from the required portion of the boiler plant via the sample water collecting means 10 is supplied to the flow meter 28 and the thermometer 3.
By monitoring 0, the cooling means 14 and the pressure reducing means 1
6. The temperature, pressure, flow rate, and water quality are adjusted to predetermined states via the head vessel 12, the flow control valve 38, and the ion exchange resin device 26, and then introduced into the analyzer 32. In the figure, reference numeral 18 indicates a stop valve, reference numeral 22 indicates a water quality abnormality detector provided as necessary in the overflow pipe 20 of the head vessel 12, and reference numeral 34 indicates an air vent valve. This is the same as the conventional configuration.

However, according to the present invention, in the above configuration, a water branch system 42 for washing / maintenance provided with a branch automatic on-off valve 40 is connected to a connection portion between the sample water supply system 24 and the analysis system 36, A main automatic opening / closing valve 44 is provided on the side of the sample water supply system 24 in the connection portion. The branch and main automatic open / close valves 40 and 44 are configured to be linked as described below.

That is, when the ion exchange resin device 26 is washed, in other words, when the leaked seawater in the sample water is detected by the detector 22 or the analyzer 32, the main automatic opening / closing valve 44 is closed and at the same time branches. The automatic open / close valve 40 opens. On the other hand, the opening of the flow control valve 38 is set to the maximum, whereby pure water having the maximum flow rate is introduced into the sample water analysis system 36 from the branching water system 42. Accordingly, the ion exchange resin device 26 is automatically cleaned and its achievement is detected by the analyzer 32.

On the other hand, the sample water supply system 24 is supplied with the normal sample water after the seawater leakage has been repaired, and therefore detects the overflow water from the overflow pipe 20 with the detector 2.
The measurement at 2 confirms the restoration of the seawater leak. Therefore, after that, the main automatic opening / closing valve 44 is opened, the branch automatic opening / closing valve 40 is closed at the same time, and the opening of the flow regulating valve 38 is returned to the original predetermined opening. Can be returned to the normal state in which the sample water is supplied to the analyzer 32. That is, cleaning of the ion exchange resin device is automatically achieved.

Next, the maintenance of the measurement operation of the analyzer 32, that is, the maintenance of the wetness of the cell portion of the analyzer during the stop of the boiler plant, detects the low water level and the normal water level of the sample water in the head vessel 12 by stopping and starting the boiler plant. To detect. Thus, the automatic opening / closing valves 40 and 44 and the flow control valve 38 can be easily achieved by operating the cleaning operation substantially in the same manner as in the cleaning operation. Therefore, detailed description is omitted, but in this case, dummy water and / or
Alternatively, sample water from another sample water sampling device can be suitably used, and the amount of water at this time can be set via the flow control valve 38 to an appropriate amount of water that can keep the cell portion moist. .

As described above, according to the present invention, the connection between the sample water supply system and the analysis system which forms the sample water sampling device is provided with the automatic branch valve which can be switched with respect to the supply system. -By connecting the maintenance water branch system, the water branch system is appropriately switched and connected to the analysis system, so that the ion exchange resin device is washed and the measurement operation of the analyzer is maintained, that is, the boiler plant is stopped. Can be automatically achieved.

The preferred embodiment of the present invention has been described above. However, the present invention is not limited to the above-described embodiment, and many design changes can be made without departing from the spirit of the present invention.

[0021]

As described above, the system for cleaning and maintaining a sample water sampling apparatus according to the present invention comprises a sample water supply system having a sample water sampling means and a head vessel, an ion exchange resin apparatus, an analyzer, and the like. In the sample water sampling apparatus, which is connected to a sample water analysis system having a flow control valve via a flow rate control valve, the connection portion has a branching automatic opening / closing valve that can be switched with respect to the supply system. With this configuration, it is possible to automatically switch and connect the water branch system to the analysis system to automatically perform cleaning of the ion exchange resin apparatus and measurement operation maintenance of the analyzer. Therefore, it is possible to obviate the need for complicated work and a great amount of consumption time conventionally required for cleaning and maintenance of this kind of apparatus.

[Brief description of the drawings]

FIG. 1 is a schematic system diagram showing one embodiment of a cleaning and maintenance system for a sample water sampling device according to the present invention.

FIG. 2 is a schematic system diagram showing a conventional sample water sampling device.

[Explanation of symbols]

 REFERENCE SIGNS LIST 10 sample water sampling means 12 head vessel 14 cooling means 16 pressure reducing device 18 stop valve 20 overflow pipe 22 detector 24 sample water supply system 26 ion exchange resin device 28 flow meter 30 thermometer 32 analyzer 34 air vent valve 36 sample water analysis system 38 Flow control valve 40 Branch automatic on-off valve 42 Branch water system 44 Main automatic on-off valve

Claims (2)

(57) [Claims] 1. A sample water supply system having a sample water sampling means, a pressure adjusting head vessel, and a sample water cooling means and a pressure reducing means as required, an ion exchange resin device, a flow meter, a thermometer, and an analyzer. In a sample water sampling apparatus, which is connected to a sample water analysis system via a flow control valve, a water branch system for washing / maintenance provided with a branch automatic open / close valve is connected to the connection portion, and a sample water supply in the connection portion is provided. The sample water is characterized in that a main automatic open / close valve is provided on the system side, and the branch and the main automatic open / close valve are linked to automatically perform cleaning of the ion exchange resin apparatus and measurement operation maintenance of the analyzer. Cleaning and maintenance system for sampling equipment. 2. The sample water collecting apparatus according to claim 1, wherein the cleaning water in the cleaning / maintenance water branch system is pure water, and the maintenance water is dummy water and / or sample water from another sample water collecting apparatus. Cleaning and maintenance system.