KR100768340B1 - Residual chlorine analyzer of sampling form - Google Patents

Abstract

A system for measuring the residual quantity of chlorine using a sampling method is provided to improve measuring accuracy and to be adopted easily according to a site condition. A system for measuring the residual quantity of chlorine using a sampling method comprises a sampling unit(10), a measuring unit(20), and a measuring sensor(40). The sampling unit includes a water tank(12), a temperature sensor(13), a hydrogen ion concentration sensor(14), and an overflow pipe(12a). The water tank has an inlet port(11) through which measuring fluid flows in. The temperature sensor and the hydrogen ion concentration sensor are positioned at an upper part of the water tank. The overflow pipe is erected inside the water tank to penetrate the bottom surface. The measuring unit is connected with the overflow pipe of the sampling unit through a transfer pipe(21) having a fixed flow valve(21a). The measuring sensor is combined with a sensor combining pipe(23) and connected with an indication system(500).

Description

Residual chlorine analyzer of sampling form

1 is a schematic diagram of a conventional residual chlorine measuring instrument,

2 is a configuration diagram of a residual chlorine measuring device of the sampling method according to the present invention,

3 is a block diagram of a residual chlorine measuring device of the sampling method according to another embodiment,

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4 is a graph showing the distribution of residual chlorine according to the measurement;

<Description of Symbols for Main Parts of Drawings>

10: sampling section 11: inlet

12: water tank 12a: overflow pipe

13: Temperature sensor 14: Hydrogen ion concentration sensor

20,30,70: measuring section 21,31: transfer pipe

21a, 31a, 61c: Constant flow valves 22, 32: Measuring tank
23,33: sensor coupling pipe 24,34: external water tank
25: drain valve 32a; Strainer
32b: drain valve 40: measuring sensor

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100,200 Meter 500: Indicator
a: cleaning particles

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The present invention relates to a residual chlorine measuring device, in particular using a measuring sensor formed with a diaphragm method, and to measure the high concentrations of waste water, sewage, sewage, etc. and the low concentration of residual chlorine for water used in constant, purified water, swimming pool, etc. The present invention relates to a residual chlorine measuring device of a sampling method in which an accurate measurement result can be obtained, and an application range is expanded by using a sampling type measuring device.

Generally, residual chlorine is also referred to as free residual chlorine, and refers to chlorine present in the form of hypochlorous acid and hypochlorous acid ions when water is disinfected with chlorine.

In addition, in some cases, it may include a combined residual chlorine such as chloramine, and the amount of chlorine remaining after a certain time by chlorine is expressed in ppm.

Residual chlorine has an oxidizing power and is chemically different from chlorine ions.

Thus, residual chlorine is strong in sterilization but disappears quickly in most drainage networks.

Factors affecting the sterilization effect of residual chlorine include reaction time, temperature, hydrogen ion concentration (pH), and the amount of chlorine consuming substance.

In other words, when chlorine is used to disinfect water, water-borne infectious diseases (e.g., cholera, typhoid, paratypus, etc.) completely disappear after 30 minutes at 0.02 ppm of residual chlorine.

The advantage of this chlorine is that it can prevent or disinfect microorganisms due to water pipe breakage, and can also sterilize microorganisms contaminated during use.

However, when there is an excessive amount of residual chlorine, the smell of chlorine is strong, metals are corroded, and there is a problem that carcinogens are generated.

As shown in FIG. 1, in the conventional residual chlorine measuring device for measuring the amount of residual chlorine, the internal space is divided by the partition wall 1 having the communication hole 1a formed at the lower portion thereof, so that the sampling space 2a and the measurement space 2b are provided. The inlet 3 is formed in the measuring tank 2 and the sampling space 2a of the measuring tank 2, and an overflow tube 4 penetrates the bottom surface of the measuring tank 2. It is formed to be exposed to the outside, the measuring sensor 5 and the temperature sensor 6 for measuring the amount of residual chlorine is formed in the measuring space (2b), the drain hole 7 formed on one side of the measuring space (2b) is overflowed It is connected to the exposed part of the pipe (3) is configured to drain the measured water.

Such a residual chlorine measuring device is supplied with the measurement water from the inlet (3).

In this way, the introduced measuring water is bubbled, etc. generated when entering the sampling space (2a) of the measuring tank (2) is drained to the outside through the overflow pipe (4), while the measuring water to the communication hole (1a) It is introduced into the measurement space (2b) through.

At this time, the measuring sensor 5 is a positive electrode formed of silver / silver chloride treated with silver chlorine, and a negative electrode made of platinum or gold, and the aqueous solution of potassium chloride (KCl) is filled inside the positive electrode and the negative electrode At the end, it is configured to block the outside by using a diaphragm.

In addition, in order to measure the electrode potential in a solution, a working electrode (counter electrode) and a counter electrode (negative electrode) capable of receiving a current signal, and a reference electrode (positive electrode) which are compared to measure the potential of the working electrode are compared. Can be divided into

When a constant potential is applied through the negative electrode, which is an auxiliary electrode, a reduction reaction of chlorine occurs on the surface of the working electrode, thereby obtaining a current signal corresponding to the reaction.

In addition, a small amount of electrolysis is performed using the working electrode, and current flows between the working electrode and the auxiliary electrode.

At this time, hypochlorous acid (HOCl) is applied to the potential to cause a reduction reaction in the working electrode to measure the amount of current generated while the hypochlorous acid (HOCl) is reduced.

In addition, since the current used increases in proportion to the amount of analyte, the amount of residual chlorine, which is the concentration of hypochlorous acid (HOCl), can be measured.

However, the conventional residual chlorine measuring device is limited to the sampling method, which is not applicable to the distribution type method, and when the cleaning particle is put in the cleaning space to clean the measuring sensor, the measurement moves from the sampling space to the measuring space. The flow rate of the water is low, the flow force of the cleaning particles is weak, there is a problem that the cleaning efficiency is lowered.

For this reason, there is a demand for a measuring method of residual chlorine that can be measured according to a sampling method and concentration, and a situation in which a residual chlorine measuring device having excellent cleaning efficiency is urgently required by improving the fluidity of cleaning particles.

Accordingly, the present invention has been made in view of the problems of the prior art as described above, using a sampling method to determine the high concentrations and low concentrations of wastewater, sewage, sewage, etc., which have a high concentration, respectively, such as constant, purified water, and pool water. It is an object of the present invention to provide a residual chlorine measuring system of sampling type that can measure accurately according to the measurement.

In addition, another object of the present invention is to clean the particles by the turbulence of the measured water generated by the difference in the diameter of the inlet pipe and the drain valve and the difference between the falling water of the measured water according to the separation of the sampling section and the cleaning section in the longitudinal direction It is an object to provide a residual chlorine meter that is flowable and improved to clean the sensor in different ways depending on the conditions.

In order to achieve the above object, the present invention is a small amount of residual chlorine measuring device is measured by the sampling method, the water tank is formed in which the inlet for measuring water is formed, the temperature sensor and the hydrogen ion concentration sensor is formed on the top of the water tank, In the inside of the sampling unit formed so that the overflow pipe penetrating the bottom surface upright,

A measurement unit connected to the transfer tube having the constant flow valve formed on the overflow tube of the sampling unit;

It is coupled to the sensor coupling tube, characterized in that consisting of a measuring sensor connected to the indicator.

 And, the measuring unit is connected to the conveying pipe is formed a measuring tank containing the cleaning particles flowing by the inflow of the measuring water is formed, one side of the measuring tank is formed with a sensor coupling tube inclined upwards, the measuring tank and the sensor While the outer tank is formed to surround the coupling tube is formed, it is disposed spaced apart 300 ~ 400mm in the vertical direction with the sampling unit, the measuring tank of the measuring unit is characterized in that consisting of a drain valve formed with a strainer perpendicular to the bottom surface .

In addition, the inlet of the sampling unit is characterized in that the filtration unit consisting of a filtration water tank formed inside the filtration filter for filtering foreign matter or suspended matter contained in the measurement water.

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In addition, the angle formed by tilting the measuring tank and the sensor coupling tube is characterized in that consisting of 40 ~ 60 °.
In addition, the measuring unit is connected to the conveying pipe is formed a measuring tank containing the cleaning particles flowing by the inflow drop of the measuring water, one side of the measuring tank is formed with a sensor coupling tube inclined upward, measuring tank and sensor The outer tank is formed to surround the coupling tube is formed, the lower surface of the sensor coupling tube is characterized in that it consists of a drain valve vertically penetrating the bottom surface of the outer tank.

The preferred embodiment of the present invention as described above will be described in detail based on the accompanying drawings.

2 is a block diagram of the residual chlorine measuring device of the sampling method according to the present invention, Figure 3 is a block diagram of the residual chlorine measuring device of the sampling method according to another embodiment, Figure 4 is a distribution of the residual chlorine according to the measurement The graph shown.

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As shown in Figures 2 to 3, looking at the residual chlorine meter measured using a sampling method as follows.
A water tank 12 having an inlet 11 through which measurement water is introduced is formed, and a temperature sensor 13 and a hydrogen ion concentration sensor 14 are formed at an upper portion of the water tank 12, and a bottom is formed inside the water tank 12. Sampling part 10 formed so that the overflow pipe 12a penetrates the surface, and conveying pipes 21 and 31 in which the constant flow valves 21a and 31a are formed in the overflow pipe 12a of the sampling part 10. Measurement units 20 and 30 connected to the) and the sensor coupling pipes 23 and 33 are coupled to the measurement sensor 40 connected to the indicator 500.

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Here, the sampling unit 10 is formed with a water tank 12 is formed with an inlet 11 through which the measurement water flows, the temperature sensor 13 and the hydrogen ion concentration sensor 14 is formed on the top of the water tank 12, The inside of the water tank 12 is comprised so that the overflow pipe 12a which penetrates the bottom surface may be upright.

In addition, the inlet 11 is configured such that the measurement water supplied by using a supply pump (not shown in the drawing) from an external reservoir such as a reservoir in which the measurement water for measuring residual chlorine is stored.

In addition, the temperature sensor 13 is for measuring the temperature of the measurement water, the hydrogen ion concentration sensor 14 to accurately measure the amount of change in the amount of residual chlorine within each interval range of the pH value 1-14 of the measurement water. Formed.

In addition, the overflow tube 12a formed in the water tank 12 is overflowed through the overflow pipe 12a when the measurement water is introduced through the inlet 11 and filled in the water tank 12 to the measuring unit 20. Configured to be moved.

At this time, the overflow tube (12a) is formed to remove bubbles generated in the measurement water flowing into the water tank 12, is formed upright in the water tank 12, the bottom surface of the water tank 12 It is configured to penetrate downward.

In addition, the measurement unit 20 is connected to the transfer pipe 21 in which the constant flow valve 21a is formed in the overflow pipe 12a of the sampling unit 10.

Here, the constant flow valve 21a is configured to allow the measurement water collected in the water tank 12 to flow through the feed pipe 21 in a predetermined amount.

In addition, the measurement tank 22 is formed to measure the amount of residual chlorine in the measurement water flowing through the transfer pipe 21.

In addition, the washing particles (a) flowing into the measurement tank 22 is introduced by the falling of the measurement water.

This, the cleaning particles (a) is formed of alumina, and flows by the measuring water and is cleaned by using a contact method for contacting foreign matter and suspended solids contained in the measuring water deposited or fixed on the surface of the measuring sensor 40 It is configured to.

On the other hand, one side of the measuring tank 22 is formed with a sensor coupling pipe 23 inclined upward.

That is, the measuring tank 22 and the sensor coupling pipe 23 are integrally manufactured by a casting method, and the inside of the measuring tank 22 and the sensor coupling pipe 23 are formed so that the inflow and outflow of the measuring water and the cleaning action of the cleaning particles (a) can be confirmed. It is composed of transparent material that can be projected.

In addition, the outer tank 24 is formed so as to surround and protect the measuring tank 22 and the sensor coupling pipe 23, it is made of the same material as the measuring tank (22).

In addition, the drain valve 25 is formed so as to communicate with the bottom surface of the sensor coupling pipe 23 and at the same time perpendicular to the bottom surface of the outer tank (24).

That is, the drain valve 25 is formed to be smaller than the diameter of the inlet 11, the amount of the measured water flowing through the inlet 11 is large, and to the same place as the reservoir where the measured water collected through the drain valve 25 The amount of discharged is small, the washing particles (a) is actively flowed by the vortex generated by the high flow rate to discharge to the narrow space inside the measuring tank (22).

On the other hand, the measuring sensor 40 is coupled using a method that is inserted into the sensor coupling pipe 23, it is connected to the indicator 500.

In detail, the measuring sensor 40 is coupled to the sensor coupling tube 23, and the inlet portion of the sensor coupling tube 23 and the measuring sensor 40 are coupled to each other so that the measurement water is not leaked in a tight fit. do.

In addition, the front part of the measuring sensor 40 is spaced apart from the inner peripheral surface of the sensor coupling pipe 23 is possible to inflow of the measuring water, and maintains a gap to prevent the loss of water by blocking the inflow of cleaning particles (a) The end of the measuring sensor 40 is configured to be exposed to the internal space of the measuring tank 22.

Such a measuring device 100 is used to measure the amount of residual chlorine in measurement water, such as wastewater, sewage, and sewage containing a high concentration of residual chlorine.

In addition, the meter 200 as another embodiment is formed in a structure similar to the meter 100.

However, the measuring unit 30 of the measuring device 200 is formed spaced apart from the sampling unit 10 in the vertical direction 300 to 400mm.

In addition, the measuring tank 32 of the measuring unit 30 is composed of a drain valve 32b in which a strainer 32a is formed perpendicular to the bottom surface.

Here, the vertical separation distance between the measuring unit 30 and the sampling unit 10 is greater than the distance between the measuring unit 20 and the sampling unit 10 constituting the measuring device 100.

That is, the diameter of the drain valve 32b through which the measured water after the measurement work is drained is formed to be the same as the diameter of the inlet 11, and discharged through the amount and the drain valve 32b introduced into the measuring tank 32. The amount is the same so that no vortex is generated.

In addition, when the vortex does not occur, in order to prevent the flow phenomenon of the cleaning particles (a) from occurring and the cleaning efficiency of the measuring sensor 40 is lowered, the cleaning particles (a) are most active by the falling water. The height of the vertical height, which is proved by several experiments, is formed to be 300-400 mm, so that the washing particles (a) can actively flow due to the falling water of the measured water.

Such a measuring device 200 is used to measure the amount of residual chlorine in the measurement water, such as a constant containing a low concentration of residual chlorine, purified water, water used in the swimming pool.

In addition, the filter unit 90, which is additionally configurable to increase the accuracy and efficiency of the measurement in the measuring devices 100 and 200, filters the foreign matter or suspended matter contained in the measurement water at the inlet 11 of the sampling unit 10. The filtration part 90 which consists of the filtration water tank 92 in which the filtration filter 91 was formed is connected.

Here, the filtration unit 90 is a transparent material projected inside, and when the measurement water is pumped by using a supply pump not shown in the drawing, the filtration unit 90 flows into the filtration water tank 92 of the filtration unit 90 and is filtered. After the bulky foreign matter, suspended matter, sludge, etc. are filtered through the filter 91, the measured water filtered by the pumping action according to the continuous supply of the measured water of the supply pump is configured to be moved to the sampling unit 10.

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On the other hand, the angle formed by the inclination of the measuring tank (22, 32) and the sensor coupling pipe (23, 33) is the best measuring efficiency of the measuring sensor 40, easy to contact by the fluidity of the cleaning particles (a) At one angle, the test results consisted of 40 to 60 °.

That is, the measuring sensor 40 for measuring the amount of residual chlorine coupled to the sensor coupling pipe (23, 33) is composed of 40 to 60 ° tilted relative to the longitudinal center line of the measuring tank (22, 32), measuring sensor (40) The lower surface of the) is formed to face the bottom surface of the measuring tank (22,32).

Because of this, it is configured to maximize the cleaning efficiency by the cleaning particles (a) flowing by the measured water.

In addition, in the present invention, the amount of residual chlorine can be measured using various methods such as the polarography method, the galvanic cell method, the electrolytic current method, the volcanic matrix method, but the example of measuring the polar chlorine method will be described.

Here, in the polarography method, the current flowing in the electrolytic vessel depends on the speed of the electrode reaction and the moving speed of the electrochemically active species to the electrode surface. At sufficiently large negative charges, the rate of electrode reaction is very fast, and the rate of movement of the species of species moving to the electrode surface is the determinant of current.

In addition, the polarographic method has the advantage of separating and measuring residual chlorine and free effective chlorine by changing reagents, and having good precision and reproducibility, but because of the influence of hydrogen ion concentration (pH), It is used to measure the amount of residual chlorine in each section.

In conclusion, a positive electrode formed of silver / silver chloride treated with silver chlorine and a negative electrode made of platinum or gold is formed inside the measuring sensor 40, and an electrolyte solution (potassium chloride, potassium chloride) is formed around the positive electrode and the negative electrode. The aqueous solution is filled inside, the end is configured to block the outside using a diaphragm.
In addition, when the concentration of the measuring water is high, the amount of pollutant is high and it is difficult to measure. Therefore, the sample is dropped and the pollutant is discharged through the drain valve. When the concentration of the measuring water is low, the pollutant is discharged by using the drain valve. It is configured to measure the accurate amount of residual chlorine by measuring the number of stable measurement by discharging.

That is, in order to measure the electrode potential in a solution, a working electrode (counting electrode) and a counter electrode (negative electrode) capable of receiving a current signal, and a reference electrode (positive electrode) which are compared to measure the potential of the working electrode are compared. Can be divided into

When a constant potential is applied through the negative electrode, which is an auxiliary electrode, a reduction reaction of chlorine occurs on the surface of the working electrode, thereby obtaining a current signal corresponding to the reaction.

In addition, a small amount of electrolysis is performed using the working electrode, and current flows between the working electrode and the auxiliary electrode.

At this time, hypochlorous acid (HOCl) is applied to the potential to cause a reduction reaction in the working electrode to measure the amount of current generated while the hypochlorous acid (HOCl) is reduced.

In addition, since the current used increases in proportion to the amount of analyte, the concentration of hypochlorous acid (HOCl) can be confirmed through this. Total free residual chlorine in the water ^{_{(Cl 2, HOCl, ClO -}} ) when the ratio of the known concentration of HOCl because it has a constant rate according to the hydrogen ion concentration (pH) it is possible to know the total of free residual chlorine.

As a result, Chemical Formulas 1, 2, and 3 may be obtained as shown in FIG. 7.

Cl ₂ + 2e ^- → 2Cl ^-

^{HOCl + H + + 2e - →} H 2 O + Cl -

^{ClO - + 2H + + 2e -} → H 2 O + Cl -

In the above, the present invention has been illustrated and described with reference to specific preferred embodiments, but the present invention is not limited to the above-described embodiments and is not limited to the spirit of the present invention. Various changes and modifications can be made by those who have

As described above, the present invention can accurately measure high concentrations and low concentrations of wastewater, sewage, sewage, etc., each having a high concentration by using a sampling method, and separately measuring high concentrations and low concentrations such as constant, purified water, and pool water having low concentrations. It is effective to improve the applicability depending on the site conditions.

In addition, the cleaning particles are flowed by the turbulence action of the measured water caused by the falling water aberration of the measured water and the difference in diameter between the inlet pipe and the drain valve as the sampling part and the cleaning part are spaced in the longitudinal direction. As a result, there is an effect that can be improved to clean in different ways.

Claims (8)

In the residual chlorine measuring device measured by the sampling method, A water tank 12 having an inlet 11 through which measurement water is introduced is formed, and a temperature sensor 13 and a hydrogen ion concentration sensor 14 are formed at an upper portion of the water tank 12, and a bottom is formed inside the water tank 12. A sampling unit 10 formed so that the overflow tube 12a penetrating the surface is upright, Measurement units 20 and 30 connected to the overflow pipes 12a of the sampling unit 10 and the transfer pipes 21 and 31 in which the constant flow valves 21a and 31a are formed; It is coupled to the sensor coupling pipe (23, 33), the residual chlorine measuring meter of the sampling method, characterized in that consisting of a measuring sensor 40 is connected to the indicator (500). According to claim 1, wherein the measuring unit 30 is connected to the transfer pipe 31 is formed a measuring tank 32 containing the washing particles (a) flowing by the inflow of the measuring water, the measuring tank 32 The sensor coupling pipe 33 is inclined upward on one side of the), the outer tank 34 formed to surround the measuring tank 32 and the sensor coupling pipe 33 is formed, while the sampling unit 10 And spaced apart from each other by 300 to 400 mm in the vertical direction, and the measuring tank 32 of the measuring unit 30 is configured to include a drain valve 32b having a strainer 32a formed perpendicularly to the bottom surface. Residual chlorine meter. The filter unit 90 of claim 1, wherein the inlet port 11 of the sampling unit 10 includes a filtration water tank 92 formed therein with a filtration filter 91 for filtering foreign matter or suspended matter contained in the measurement water. ) Is a residual chlorine measuring meter of the sampling method characterized in that the configuration. delete delete The method of claim 1, wherein the measuring tank (22, 32) and the sensor coupling pipe (23, 33) is formed by the angle of the angle of the chlorine measuring method of the sampling method, characterized in that consisting of 40 to 60 °. According to claim 1, wherein the measuring unit 20 is connected to the transfer pipe 21 is formed a measuring tank 22 containing the cleaning particles (a) flowing by the inflow of the measuring water, the measuring tank 22 The sensor coupling pipe 23 is inclined upwardly on one side of the), and the outer tank 24 formed to surround the measuring tank 22 and the sensor coupling pipe 23 is formed, while the sensor coupling pipe 23 is formed. Residual chlorine level meter of the sampling method, characterized in that consisting of a drain valve (25) penetrating the bottom surface of the outer tank (24) perpendicular to the lower surface. delete

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