JPH0517550U - Continuous batch iron analyzer - Google Patents

Abstract

(57) [Summary] [Purpose] To achieve accurate total iron determination while reducing batch analysis time. [Constitution] The continuous batch type all-iron analyzer comprises a sample water measuring system 18 for sample water 10 and a sample water heating / dissolving cooling system 62, 66.
The sample water reaction system 34, the sample water measuring system 40, and the cleaning device 50 are formed, and the sample water is batch-analyzed by controlling the sequence of these systems and the cleaning device at the same time as cleaning each system. Is configured. However, the heating, melting and cooling system in the above analysis step requires a particularly long process time (more than twice that of other systems).
However, since the system is provided with the two systems 62 and 66 and operates alternately as described above, the batch analysis time is reduced to 1/2 or less as compared with the conventional apparatus. In addition, since each system is washed during each batch, the history phenomenon is eliminated by the previous sample water residual liquid, and accurate measurement is achieved.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a total iron analyzer for colorimetrically determining the total amount of iron in feed water or condensate in a thermal power plant or a nuclear power plant in a continuous batch system.

[0002]

[Prior Art]

 Generally, a total iron analyzer is configured to convert a total amount of iron in a fixed amount of sample water into ferrous ions and then develop the color, and measure this by quantitative light passing through an interference filter. However, since the total amount of iron in the above-mentioned power plants, etc. is extremely small, when the above-mentioned measurement is carried out in a continuous batch, a historical phenomenon due to the residual liquid of the previous sample water may occur and an accurate quantification may be achieved. could not.

Therefore, the present applicant has previously applied for development (Patent Publication No. 1-53415) of a device capable of overcoming the hysteresis phenomenon and put it into practical use. The apparatus will be briefly described below. As shown in FIG. 2, the continuous batch type total iron analyzer comprises a sample water measuring tank 16 for sampling a fixed amount of the sample water 10 via a head vessel 12 and a control valve 14. It consists of a metering system 18, a heating condenser 22 connected to this system 18 via a control valve 20, and a first chemical liquid injector 24 for injecting a predetermined chemical liquid into the heating condenser 22. It comprises a sample water heating / dissolving / cooling system 26 for converting into ferrous ions, a reaction tank 30 connected to this system 26 via a control valve 28, and a second chemical liquid injector 32 for injecting a predetermined chemical liquid into the reaction tank 30. As a result, the total amount of iron is measured by the quantitative water that has passed through the interference filter and is composed of the sample water reaction system 34 that develops the ferrous iron and the measuring instrument 38 that is connected to the system 34 through the control valve 36. Consists sample water measurement system 40. The further cleaning device 50 is provided that. Reference numeral 42 indicates a discharge control valve for used sample water, and reference numeral 44 indicates a calibration device for calibrating the analyzer using a known total iron concentration sample water. Further, the sample water measuring tank 16 is provided with control valves 16a and 16b for the discharge pipe and the overflow pipe, the first chemical liquid injection device 24 is composed of a thioglycolic acid solution tank 24a and a metering pump 24b, and the reaction tank 30 is a stirrer 30a. The second chemical liquid injector 32 is equipped with an ammonia acetate solution tank 32a, a T.P.T.Z solution tank 32b and metering pumps 32c and 32d, and a measuring instrument 38 is a lamp 30a, a heat absorption filter 30b, and a measuring cell. The cleaning device 50 is composed of three systems of pure water 52, compressed air 54, and acidic cleaning liquid 56, and the adjusting valves 52a and 54a and the pump 56a and the control valves 52b to 52e, 54b to 54e and 56b, respectively. ~ 56e.

In such a configuration, the control valves 14, 20, 28, 30, 42 of the respective systems 16, 26, 30, 38 which constitute the analyzer, the auxiliary control valves 16a, 16b and The pumps 24b, 32c, 32d, the stirrer 30a, and the adjusting valves 52a, 54a of the cleaning device 50, the pump 56a and the control valves 52b to 52e, 54b to 54e, 56b to 56e are sequence-controlled, respectively, and thus, in the analyzer. A fixed amount of sample water sequentially passes through each system 18, 26, 34, 40, and the total iron analysis of sample water at different required sites is performed in a continuous batch system. Are sequentially cleaned through the cleaning device 50 after the completion of the process in preparation for the next batch process. As described above, according to this all-iron analyzer (hereinafter referred to as “conventional technology”), each analysis system is washed during each batch process, and the history phenomenon due to the residual liquid of the previous sample water is erased. Accurate total iron determination is achieved in each batch process.

[0005]

[Problems to be solved by the device]

 However, the above-mentioned prior art has the following drawbacks that should be improved.

That is, in the batch analysis, the sample water is sequentially passed through four steps of measurement, heating, dissolution and cooling, reaction and measurement from the upstream side. However, the time required for each step is different, In addition, the second step, that is, the heating, melting and cooling step, required a time twice as long as that of the other three steps (about 15 minutes including the washing step). This is because in the second step, the sample water must be once heated and boiled and then cooled and condensed. That is, in the above-mentioned prior art, at least 15 minutes are required between each batch analysis. However, in power plants and the like, the start-up mode, daily and weekly start-up / shutdown are frequently performed, and therefore, prompt water quality measurement is required when the water quality is unstable as described above. However, it became difficult to cope with this with the batch analysis required time.

Therefore, an object of the present invention is to provide a continuous batch type total iron analyzer capable of achieving accurate accurate determination of total iron and shortening the batch analysis time.

[0008]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, a continuous batch type total iron analyzer according to the present invention is a sample water measuring system for collecting a fixed amount of sample water and a sample water for converting total iron in sample water into ferrous ions. It consists of a heating and dissolution cooling system, a sample water reaction system that develops ferrous iron color, and a sample water measurement system that measures the total amount of iron by quantitative light that has passed through an interference filter. By sequentially controlling the control valve of the cleaning device and the control valve of the cleaning device, the above-mentioned systems are sequentially operated in the order of steps to continuously batch-analyze the total iron content in the sample water, and the completed batches of the systems are automatically cleaned sequentially. The total iron analyzer is characterized in that two sample water heating / dissolving / cooling systems are provided and these are operated alternately.

[0009]

[Action]

 In the device of the present invention, two sample water heating / melting / cooling systems which require a particularly long process time are provided and alternately operated. Moreover, in this case, since the cleaning of one system can be performed while the other system is operating, the batch analysis time is reduced to less than half compared with the conventional one. Since the apparatus is automatically cleaned for each batch, it is a matter of course that accurate total iron analysis can be achieved.

[0010]

【Example】

 Next, one embodiment of a continuous batch type total iron analyzer according to the present invention 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. 2 are designated by the same reference numerals.

First of all, the continuous batch type total iron analyzer according to the present invention is different from the conventional continuous batch type total iron analyzer shown in FIG. 2 in a part of the sample water treatment system (heating dissolution cooling system). ) Except that the configuration is basically the same. Therefore, in the following description, description of the same components will be omitted or simplified.

In FIG. 1, the continuous batch type total iron analyzer of the present invention comprises a sample water measuring system 18 for collecting a fixed amount of sample water 10 from a sample water measuring tank 16, and a first chemical liquid injector 24. First and second heating condensers 60 and 64, respectively, and first and second heating / dissolving cooling systems 62 and 66 for converting all iron in the fixed amount of the sample water into ferrous ions , A sample water reaction system 34 consisting of a reaction tank 30 and a second chemical injection device 32 for coloring the above-mentioned ferrous ions, and a sample water for measuring total iron content by a constant quantity light passing through an interference filter consisting of a measuring device 38. A measuring system 40 and a cleaning device 50 are further provided. That is, in the apparatus of the present invention, the sample water heating / dissolving / cooling system is composed of two systems 62 and 66 in comparison with the above-mentioned prior art. Due to the modification of this system, the heating condenser 60 in both systems 62 and 66 is changed. , 64 are newly provided with control valves 60a, 64a and a three-way control valve 68, a new three-way control valve 24c is provided with respect to the first chemical liquid injector 24, and the cleaning device 50 has Further, three-way control valves 52f, 54f, 56f are provided corresponding to both the systems 62, 66.

In such a configuration, each system 18, 62, 66, 34, 40 and the cleaning device 50 are sequence-controlled, and continuous batch analysis of sample water and cleaning of each system are performed as in the conventional device. In the present invention, however, the heating and melting cooling systems 62 and 66 are alternately operated during this period, and the cleaning of one system is performed during the operation of the other system. Therefore, in the present invention, the batch analysis time is shortened to 1/2 or less as compared with the conventional apparatus. That is, it was confirmed that in the actual device, the above-mentioned 15 minutes in the conventional device was shortened to 6 minutes.

As described above, according to the present invention, it is possible to achieve an accurate determination of total iron and at the same time shorten the batch analysis time. Therefore, there is a demand for accurate and rapid water quality determination when water quality is unstable in a recent power plant or the like. Can be dealt with enough. If a short batch analysis interval is not required, such as when water quality is stable, the batch cycle operation mode is set to 15 minutes, 30 minutes, 45 minutes, 60 minutes, etc. It is preferable that only one system be used for the dissolution cooling system and the other systems be cleaned and stored in full water.

The present invention has been described above with reference to the preferred embodiments, but the present invention is not limited to the above embodiments, and many design changes can be made within the spirit of the invention.

[0016]

[Effect of the device]

 As described above, according to the continuous batch type total iron analyzer of the present invention, the measuring system for the sample water, the heating and dissolving cooling system, the reaction system and the measuring system are provided and the cleaning device is provided. In a continuous batch type total iron analyzer configured to batch-analyze sample water by controlling the washing device in sequence and to wash each system during this period, a heating, melting and cooling system that requires a particularly long process time was used. Since it is constructed in two lines and configured to operate alternately, an accurate total iron determination can be achieved and the batch analysis time can be shortened to less than 1/2 compared with the conventional one. Therefore, it has become possible to sufficiently respond to the accurate and prompt water quality judgments required in recent power plants and the like.

[Brief description of drawings]

FIG. 1 is a system diagram showing a continuous batch type total iron analyzer according to the present invention.

FIG. 2 is a system diagram showing a conventional continuous batch type total iron analyzer.

[Explanation of symbols]

 10 ... Sample water 12 ... Head vessel 14 ... Control valve 16 ... Sample water metering tank 18 ... Sample water metering system 20 ... Control valve 24 ... First chemical liquid injector 30 ... Reaction tank 32 ... Second chemical liquid injector 34 ... Sample water Reaction system 36 ... Control valve 38 ... Measuring device 40 ... Sample water measuring system 42 ... Control valve 44 ... Calibration device 50 ... Washing device 52 ... Pure water 54 ... Compressed air 56 ... Acid washing liquid 60 ... First heating condenser 62 ... No. 1 sample water heating dissolution cooling system 64 ... second heating condenser 66 ... second sample water heating condenser

Claims (1)

[Scope of utility model registration request] 1. A sample water measuring system for collecting a fixed amount of sample water, a sample water heating / dissolving cooling system for converting total iron in sample water into ferrous ions, and a sample water reaction system for coloring ferrous ions. The sample water measuring system for measuring the total iron content by the quantitative light that has passed through the interference filter and the control valve for connecting the respective systems and the cleaning device having the cleaning device and the control valve of the cleaning device are sequence-controlled to achieve the above-mentioned each. In the continuous batch type total iron analyzer, in which the systems are sequentially operated in order of sequential batch analysis of total iron content in the sample water and each system that has completed the process is sequentially washed, two sample water heating dissolution cooling systems are provided. A continuous batch type total iron analyzer characterized by being configured to operate alternately.