JPH058461U - Simple concentration meter - Google Patents

Abstract

(57) [Abstract] [Purpose] The present invention, when dissolving an oxidant or a reducing agent in continuously flowing raw water, is an aqueous solution in which the oxidant or the reducing agent is dissolved, such as ozone water or pool water. Concerning a measuring device that can easily measure the concentration of chlorous acid, etc., one measuring device can directly measure the absolute potential difference based on the difference between the concentration of the aqueous solution and the concentration of the raw water, thus making the concentration of the aqueous solution very easy. It is an object of the present invention to provide a completely new measuring device that can be directly and directly obtained. [Structure] The main point of the structure of the present invention is that the measuring device main body 1 is provided with two electrodes 5 and 6 of the same kind of corrosion resistance that can be respectively immersed in raw water and an aqueous solution in which an oxidizing agent or a reducing agent is dissolved.
The electromotive force generated between the electrodes 5 and 6 is configured to be measurable.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

  The present invention is a simple concentration measuring device, more specifically, an oxidizing agent or Is an aqueous solution in which the oxidizing agent or reducing agent is dissolved when the reducing agent is dissolved, For example, it relates to a measuring instrument that simply measures the concentration of ozone water or hypochlorous acid in a pool.

[0002]

[Prior art]

  Generally, two electrodes are immersed in an aqueous solution, and the electromotive force generated between them causes the aqueous solution to An example of a method of measuring the concentration of the It   That is, as shown in the figure, this electrode 10 has a platinum electrode 11 in a glass tube 11. While inserting the pole 12, the potassium chloride aqueous solution 14 is piped through the partition wall 13. 11 was filled and the silver / silver chloride electrode 15 was immersed in the potassium chloride aqueous solution 14. The tube body 11 is provided with a porous sintered glass 16 therein.

[0003]   Then, using the electrode 10 as described above, the above-mentioned oxidizing agent and reducing agent are dissolved. When measuring the concentration of the aqueous solution, two electrodes 10 as described above are prepared, and one of them is prepared. The other electrode 10 is immersed in the flow path 17 of the raw water flowing as shown by the arrow A in FIG. In addition, as shown in the arrow B direction in the figure, the charging unit 18 into which the oxidizing and reducing agents are charged is The other electrode 10 is immersed in the flow path 19 on the far rear side to generate an absolute Each electromotive force, and based on the absolute electromotive force, By determining the relative potential of the aqueous solution side electrode 10 flowing through the path 19, The concentration of the aqueous solution was measured.

[0004]

[Problems to be solved by the device]

  However, according to such a measurement method, in the electrode as described above, As described above, in order to obtain a comparable potential, potassium chloride as a comparison solution is used inside the electrode. It is necessary to store the aqueous solution of water, but with long-term use, the comparison solution becomes concentrated. It is said that the solution flows out to the aqueous solution side where the degree is to be measured, and vice versa. There was a problem.   Therefore, if such a thing occurs, the concentration of the aqueous solution cannot be accurately measured. , Relatively had to be replaced.

[0005]   In addition, depending on such an electrode, it may be generated between the electrodes immersed in the aqueous solution and the comparison solution. Only the generated electromotive force can be measured, based on the difference between the concentration of the aqueous solution and that of the raw water. To find the relative potential difference, immerse an electrode of the same type on the raw water side as described above. It is necessary to measure the electromotive force on the raw water side of the This requires two sets of electrodes, which makes the measurement operation very complicated. It was

[0006]   The present invention has been made to solve such a problem, and has one measuring instrument. Therefore, it is possible to directly measure the potential difference based on the difference between the concentration of the aqueous solution and the concentration of the raw water, Therefore, it is possible to obtain the concentration of the aqueous solution very easily and directly. It is an object to provide a measuring instrument.

[0007]

[Means for Solving the Problems]

  The present invention has been made to solve such a problem, and solves the problem. The means to do this is to dissolve the oxidizing or reducing agent in the continuously flowing raw water. , A concentration measuring device for measuring the concentration of an aqueous solution in which the oxidizing agent or reducing agent is dissolved, In the measuring device body 1, the raw water and the aqueous solution in which the oxidizing agent or reducing agent is dissolved Two electrodes 5 and 6 having the same kind of corrosion resistance for dipping each are provided, and both electrodes 5 , 6 is configured to be measurable.

[0008]

[Action]

  That is, because of such a configuration, one electrode 5 is immersed in raw water, The above measurement is performed so that the other electrode 6 is immersed in the aqueous solution in which the oxidizing and reducing agents are dissolved. When the vessel body 1 is installed, the electromotive force between the electrodes 5 and 6 based on the difference in concentration between the aqueous solution and the raw water. Can be directly measured.   Therefore, if the electromotive force between both electrodes 5 and 6 is measured, the concentration of the aqueous solution can be determined. It is possible to ask directly.

[0009]

【Example】

  Embodiments of the present invention will be described below with reference to the drawings.   In FIG. 1, reference numeral 1 is a synthetic resin measuring instrument main body, which has a top plate 2 on the upper portion and a lower portion on the lower portion. It is formed in a substantially tubular shape having an opening 3.

[0010]   Reference numeral 4 denotes a pipe serving as a flow path for raw water, which is inserted into the measuring device main body 1 through the opening 3. It is inserted, penetrates the top plate 2, and its tip portion 4a protrudes above the measuring device main body 1. Thus, it is attached to the measuring instrument body 1.

[0011]   One electrode 5 made of platinum is provided by being inserted into the pipe 4.   Numeral 6 is the other electrode made of platinum, which is projected on the top plate 2 of the measuring instrument body 1. , Is attached to the top plate 2.

[0012]   Numeral 7 is a voltmeter for measuring the potential difference between the electrodes 5 and 6, and is a It is connected to poles 5 and 6.

[0013]   Next, by using the simple measuring device 8 having the above-mentioned configuration, the raw water continuously flowing. When the oxidizing agent or reducing agent is dissolved in the water, the oxidizing agent or reducing agent is dissolved in the water. The case of measuring the concentration of the solution will be described.

[0014]   First, the tip portion 4a of the pipe 4 and the other electrode 6 are used for measuring the concentration of water. The measuring device 8 is installed so as to be exposed to the flow path 9 of the solution.

[0015]   Next, in this state, the pipe 4 is connected to the raw water flow path (not shown), The raw water is made to flow through the pipe 4 from the flow path, and flow out to the flow path 9 for the aqueous solution. .

[0016]   On the other hand, an oxidizing agent or a reducing agent is added to the raw water that has flowed out into the aqueous solution channel 9. As a result, in the channel 9, an aqueous solution in which the charged oxidizing agent or reducing agent is dissolved is introduced. Will be distributed.

[0017]   Then, the difference in concentration between the raw water flowing in the pipe 4 and the aqueous solution flowing in the channel 9 Based on the above, a potential difference of several tens to several hundreds mV is generated between the electrodes 5 and 6, and the potential difference is It can be measured with a voltmeter 7.

[0018]   In this case, since the concentration of raw water in which the oxidizing agent and the reducing agent are not dissolved is 0, The potential difference measured in this way is expressed as a function of the concentration of the aqueous solution only, and Then, if the potential difference is measured, the concentration of the aqueous solution can be immediately obtained. .

[0019]   As a result, the concentration of the aqueous solution can be measured very easily with the simple measuring instrument as described above. It has become possible to do so.

[0020]   The shape of the measuring device body 1 is not limited to the substantially cylindrical shape having the top plate 2 as in the above embodiment. And its material is not limited to synthetic resin. It can be arbitrarily changed according to the place.

[0021]   The type of oxidizer dissolved in the aqueous solution may be, for example, ozone or peroxide water. It is possible to use elemental or other oxidizing agents, and the reducing agent is For example, use sodium ascorbate, sodium sulfite, or other reducing agents. It is possible to In any case, the type of oxidizing agent or reducing agent does not matter.   In addition, in the present invention, an oxidizing agent or a reducing agent means the redox type electric charge as in the present invention. Means any drug whose concentration can be measured with a measuring instrument equipped with the polar principle Is.

[0022]   Therefore, the simple concentration measuring device of the present invention can be used for measuring the concentration of ozone water, It can be used for various purposes such as measuring the concentration of hypozinc acid in pools, Its use does not matter.

[0023]

[Effect of device]

  As mentioned above, the present invention has two types of the same type of corrosion resistance that can be immersed in raw water and aqueous solution. Since the electrodes are provided on the main body of the measuring instrument, one electrode is immersed in raw water and the other One of the electrodes should be immersed in an aqueous solution of oxidizing and reducing agents. When the main body is installed, the electromotive force between both electrodes based on the difference in concentration between the aqueous solution and the raw water flowing directly can be directly applied. It becomes possible to measure.   Therefore, if the electromotive force between both electrodes is measured, the concentration of the aqueous solution can be directly obtained. It is possible to set.   Therefore, as in the conventional method, two electrodes are prepared and the electromotive force is measured separately. Routine operations are not required, and it is very easy to adjust the concentration of the desired aqueous solution with one measuring instrument. May be directly calculated without the indirect work of measuring relative electromotive force. There is a remarkable effect that it is possible.

[0024]   Moreover, since the electrodes are corrosion resistant, they can be used in conventional redox type electrodes, for example. There is no risk of the electrode itself dissolving in raw water like the silver and silver chloride electrodes provided. , The raw water itself can be used as the comparison solution, and in that case also concentration error may occur Since it is not affected by changes in electromotive force due to changes in water quality and water temperature, The advantage is that stable and stable measurement is possible.

[0025]   In addition, there is no need to replace the reference liquid such as the electrodes used in the past. There is no need for tenancy, and there is no need to prepare two sets of electrodes as in the past. The equipment cost is low because the work can be done by installing the measuring instrument as shown in one place. There is a real benefit.

[0026]   Further, unlike the conventional redox type electrode, it is not necessary to store the comparison solution inside the electrode. For this reason, the structure can be simplified, and it is not expensive glass or diaphragm, but general vinyl chloride etc. It is possible to use various resins, and the actual manufacturing cost of the entire measuring device is low. .

[Brief description of drawings]

FIG. 1 is a schematic cross-sectional view of a measuring device as an embodiment of the present invention.

FIG. 2 is a schematic sectional view of a conventional redox electrode.

FIG. 3 is a schematic cross-sectional view showing a usage state of the redox electrode.

[Explanation of symbols]

1 ... Measuring device body 5 ... Electrode 6 ... Electrode

Claims (2)

[Scope of utility model registration request] 1. A concentration measuring instrument for measuring the concentration of an aqueous solution in which an oxidizing agent or a reducing agent is dissolved when the oxidizing agent or the reducing agent is dissolved in continuously flowing raw water. , Two electrodes 5 and 6 of the same kind of corrosion resistance that can be respectively dipped in the raw water and the aqueous solution in which the oxidizing agent or the reducing agent is dissolved are provided, and the electromotive force generated between the electrodes 5 and 6 can be measured. A simple concentration measuring device characterized in that 2. A concentration measuring device for measuring the concentration of an aqueous solution in which an oxidizing agent or a reducing agent is dissolved when the oxidizing agent or the reducing agent is dissolved in continuously flowing raw water. A pipe 4 serving as a flow path for the raw water is attached through the pipe 4, and a corrosion-resistant electrode 5 is provided in the pipe 4 so that an electrode 6 of the same kind as the electrode 5 is provided in the measuring device main body 1. A simple concentration measuring device, which is provided on the measuring device main body 1 so as to project to the outside, and is configured to be capable of measuring an electromotive force generated between both electrodes 5 and 6.