KR100366954B1 - automatic chlorine supplier - Google Patents

Abstract

The present invention relates to a chlorine automatic supply device, by supplying the optimum amount of chlorine to the water flowing into the water tank 101, it is to disinfect the water flowing into the water tank (101). To this end, the automatic chlorine supply device, the water tank 101 having an inlet 102 and the outlet 103; A chlorine storage chamber 104 installed at an adjacent point of the inlet 102 and storing chlorine therein; A valve body 105 mounted to the chlorine storage chamber 104 to open and close the flow of chlorine from the chlorine storage chamber 104 to the water tank 101; A first sensor 107 installed at an inlet 102 of the water tank 101 to measure a redox potential of water introduced into the water tank 101; A second sensor 108 installed at an outlet 103 to measure a redox potential of water flowing out of the water tank 101 to the outside; And when the potential difference between the first potential measurement measured by the first sensor 107 and the second potential measurement measured by the second sensor 108 is less than a predetermined potential, the valve body 105 is opened to open the chlorine storage chamber ( 104 to discharge the chlorine in the water tank 101, and close the valve body 105 when the potential difference is more than a predetermined potential to block the chlorine in the chlorine storage chamber 104 to be discharged to the water tank 101 Including the control unit 106 to be, characterized in that to disinfect the water by putting the optimum amount of chlorine in the water stored in the water tank 101.

Description

Chlorine supplier

The present invention relates to a chlorine automatic supply device, and more particularly, by automatically supplying the optimum amount of chlorine to the water flowing into the water tank by using an electronic control device, chlorine automatic that can disinfect the water flowing into the water tank It relates to a supply device.

In general, water used as a simple tap water contains various bacteria and cannot be used as a constant without disinfecting these bacteria. Thus, to disinfect the constant, a disinfectant is administered to the constant.

Chlorine is widely used as a disinfectant. Appropriate amount of chlorine is added to the water in the form of residual chlorine, which can be used in the disinfection of water because it can maintain the disinfection effect.

Hereinafter, the theoretical background of the method of using chlorine as a disinfectant will be described.

Hypochlorite, the most commonly used chlorine product for drinking water disinfection, is sold in dry form (Ca (OCl) ₂ ; calcium hypochlorite) or in liquid form (NaOCl; sodium hypochlorite). They dissociate or quantize in water to exist in the form of hypochlorous acid or hypochlorite ions. The relative concentration distributions of hypochlorous acid and hypochlorite ions are a function of pH as shown in Table 1.

_{(Ca (OCl) 2) -} > Ca 2+ + 2 OCl -

NaOCl-> Na ⁺ + OCl

OCl + H ⁺ <-> HOCl

Hypochlorous acid and hypochlorite ions are both excellent disinfectants, but it is more effective to halve with hypochlorous acid. Hypochlorous acid oxidizes organic and inorganic substances.

Oxidation of organic matter can be represented by the following reaction, which sterilizes bacteria.

_{C 6 H 12 O 6 + 6} HOCL + 3O 2 -> 6CO 2 + 6H 2 O + 6HCL

The main reaction among inorganic reactions is with ammonia.

The relative amounts of the various chloramines formed at this time are a function of HOCl concentration and pH. Monochloamine is present at pH above 6.0, and dichloamine dominates at pH 5.

As mentioned above, the method of adding chlorine to water used as a constant has the advantage.

However, in simple water supply facilities, workers have been using regular methods of disinfecting the water directly into the water supply tank, but since the labor costs are high, maintenance costs are high, and the chlorine concentration cannot be kept constant. Not only was it impossible to manage, but disinfectants had to be administered at the time of disinfection, which was very cumbersome and inconvenient.

In addition, the liver abnormality is difficult to disinfect because there is no professional manager because of its characteristics, in order to solve this inconvenience, injecting the liquid into the reservoir to automatically inject the liquid into the reservoir, depending on the flow rate of the water supply pipe Although it was possible to control the amount of chlorine injected into the tank, since no method of continuously measuring the residual chlorine concentration remaining in the water introduced into the reservoir has been developed, the amount of chlorine added to the water is not optimal. There is a problem that the disinfection effect is not good.

Therefore, the present invention has been made to solve the above problems, by supplying the optimum amount of chlorine to the water flowing into the water tank, it is possible to disinfect the water flowing into the water tank, to the water supply manager in case of abnormal sterilization work It is to provide an automatic chlorine supply device that can automatically notify of abnormal conditions.

1-schematic configuration diagram of an automatic chlorine supply device according to the present invention.

2-a flow chart of the operation of the automatic chlorine supply device of FIG.

<Description of Symbols for Main Parts of Drawings>

101: water tank 102: inlet

103: outlet 104: chlorine storage chamber

105: solenoid valve 106: control unit

107: first sensor 108: second sensor

Automatic chlorine supply apparatus according to the present invention for achieving the above object, the water tank having an inlet and outlet; A chlorine storage chamber installed at an adjacent point of the inlet and storing chlorine therein; A valve body mounted to the chlorine storage chamber to open and close the flow of chlorine from the chlorine storage chamber to the water tank; A first sensor installed at an inlet of the water tank and measuring a redox potential of water introduced into the water tank; A second sensor installed at the outlet and measuring a redox potential of the water flowing out from the water tank; And when the potential difference between the first redox potential measurement measured by the first sensor and the second redox potential measurement measured by the second sensor is equal to or less than a predetermined potential, the valve body is opened to release chlorine in the chlorine storage chamber. And a control unit for closing the valve body when the potential difference is greater than or equal to the predetermined potential to block the discharge of chlorine in the chlorine storage chamber into the water tank.

Here, the first sensor and the second sensor are each formed of an electrode, the electrode is a combination type redox electrode and for safety in the water tank, it is preferable that it is employed as an epoxy body (epoxy body).

The control unit of the chlorine supply device is provided with a button or dial for the administrator to set a predetermined potential in the range of 30 to 90 mV. The predetermined potential is represented by 0.2 ppm of chlorine, which is a suitable concentration for disinfecting drinking water. It is around 60 mV and varies with seasonal water temperature and water quality.

For example, if the administrator decides the predetermined potential corresponding to the proper chlorine concentration through preliminary experiments and sets the predetermined potential to 50 mV in the control unit to operate the autoinjector in the water tank without chlorine, the potential difference increases as the chlorine is automatically injected. When the potential difference reaches 50 mV, the valve body is closed to stop the chlorine injection. When the chlorine concentration decreases due to changes in the water tank, the potential difference is lowered below 50 mV, so the valve body is opened again and chlorine injection is resumed. In this way, by opening and closing the valve body of the chlorine tank to the potential difference that changes according to the chlorine concentration of the drinking water, the chlorine concentration of the water tank can be maintained at an appropriate concentration at all times to maintain the disinfection state of the water tank safely.

If the chlorine autoloader operates normally, the potential difference will be maintained in the range of 10mV up and down a predetermined unit, so under normal circumstances, the potential difference will not occur when the potential is + 30mV or less than -30mV. Therefore, if the potential difference is more than the predetermined potential + 30mV or less than the predetermined potential -30mV it means that the device is a failure or other emergency. In case of such an emergency, the control unit is equipped with an emergency notification device. Emergency notification device is a radio transmitting device for transmitting a text signal or a voice signal to the administrator's mobile phone wirelessly.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

1 is a schematic configuration diagram of an automatic chlorine supply device according to the present invention. As shown in this figure, the automatic chlorine supply apparatus, the water tank 101 having an inlet 102 and the outlet 103; A chlorine storage chamber 104 installed at an adjacent point of the inlet 102 and storing chlorine therein; A valve body 105 mounted to the chlorine storage chamber 104 to open and close the flow of chlorine from the chlorine storage chamber 104 to the water tank 101; A first sensor 107 installed at an inlet 102 of the water tank 101 to measure a redox potential of water introduced into the water tank 101; A second sensor 108 installed at an outlet 103 to measure a redox potential of water flowing out of the water tank 101 to the outside; And when the potential difference between the first potential measurement measured by the first sensor 107 and the second potential measurement measured by the second sensor 108 is less than a predetermined potential, the valve body 105 is opened to open the chlorine storage chamber ( 104 to discharge the chlorine in the water tank 101, and close the valve body 105 when the potential difference is more than the predetermined potential to block the chlorine in the chlorine storage chamber 104 to be discharged to the water tank 101 Including the control unit 106 to be, characterized in that to disinfect the water by putting the optimum amount of chlorine in the water stored in the water tank 101.

The first sensor 107 and the second sensor 108 are each formed of an electrode, and the electrode is adapted to be used as a combination tye (redox electrode) and an epoxy body.

The automatic chlorine supply device further includes a transmitter capable of notifying the water supply manager of disinfection abnormality or mechanical operation abnormality when the potential difference is a predetermined potential, for example, 20 mV or more.

The valve body 105 is comprised by the solenoid valve 105, and is operable by the operation of the control part 106. FIG. In addition, the chlorine storage tank is made of a corrosion resistant material, so that it is not easily damaged even by strong acidic chlorine.

Hereinafter, the theoretical background of the potentiometric method will be briefly introduced.

For electrochemical detection of dissolved cations, anions and gas ions, potentiometry is widely used to measure the potential change according to the activity (or concentration) of ions. Potentiometric analysis is based on measuring the potential of an electrochemical cell in the absence of current. The concentration of ions is determined directly from the potential of the ion selective electrode that selectively reacts with the ions to be analyzed. Such electrodes are relatively unaffected by other ions and provide a quick and convenient way to quantify many important anions, cations and gases. The effect of activity (or concentration) on the electrode potential is represented by the Nernst equation:

Dip the appropriate indicator and reference electrodes into the solution to be analyzed, and determine the concentration of the analyte by measuring the potential. The electrode must be calibrated with the standard solution. E _cell vs. Calibration lines, such as log concentration, can be prepared by making a series of standard solutions and measuring the potential.

A variety of membrane electrodes are available on the market for the rapid and selective quantitation of various cations and anions by potentiometric measurements. The membrane electrode used as the indicator electrode is also called an ion-selective electrode (ISE) because of its high selectivity to dissolved ions. ISE is prepared by immobilizing a sensitive material that selectively reacts with an ion to be analyzed on a polymer support, or by using a gas-selective permeable membrane or a solid sensitive material.

All ion-selective membranes have a common property, which is their sensitivity and selectivity to any cation or anion. Dissolved cations (NH ₄ ⁺ , Cd ²⁺ , Cu ²⁺ , Pb ²⁺ , Li ⁺ , NO _X , K ⁺ , Ag ⁺ , Na ⁺ , Ca ²⁺ , Mg ⁺² , X ⁺ ), anions ^{_{(Br -, CO 3 2-,}} Cl -, CN -, F -, BF 4 -, I -, NO 3 -, ClO 4 -, S 2-, X -) and a gas (NH _3, CO ₂₎ Since ISE has been developed, it is possible to measure their concentration easily and quickly by potentiometric method.

Hereinafter, an analysis method using ISE will be introduced.

1) A typical ion-selective electrode includes a glass electrode for pH measurement that measures hydrogen ion concentration. The tip of the glass electrode consists of a thin glass membrane that is sensitive to the pH of the solution. The glass restraint contains silver lead coated with AgCl and filled with 0.1 M hydrochloric acid solution saturated with silver chloride. Since the activity (a _{H +} ) of hydrogen ions inside the membrane is kept constant by HCl, the cell potential is sensitive to the pH of the sample solution. Where the potential for concentration in hydrogen ions is defined as

E = E *

The pH meter measures the potential of the glass electrode relative to the external reference electrode and displays this output on a meter scale calibrated with a pH scale. The pH meter does not know the relationship with pH to measure the electrochemical cell potential, so it should be standardized to show an appropriate pH value. Standardization utilizes one or more standard buffer solutions of known pH.

2) For example, a calcium ion-selective electrode uses a polymer membrane immobilized with Ionophore, a compound capable of selectively ion exchange with calcium ions, and a silver / silver chloride electrode used in a pH electrode as a reference electrode. According to the concentration of calcium ions, the potential difference occurring at the calcium ion-selective electrode may be expressed as follows.

Using a calcium ion standard solution that knows the concentration accurately, the linear equation is obtained from the potential of the calcium ion-selective electrode according to the calcium ion concentration. The electrode is placed in a calcium ion sample solution and the potential is calculated. Then, the concentration of calcium ion is obtained from a straight line.

In general, in the case of hydrogen ions, the measured value is displayed on the device by converting the generated potential into a pH scale, and the other dissolved ions represent the measured value in potential (mV units). The concentrations of other cations, anions and dissolved gases that are dissolved can also be measured from the potential of the ISE, such as hydrogen ions and calcium ions.

Based on the theoretical background as described above, the potential of water is measured and applied to chlorine disinfection.

Hereinafter will be described the operation and effect of the automatic chlorine supply device according to the present invention.

Figure 2 is a flow chart of the operation of the automatic chlorine supply device of FIG. As shown in this figure, when the water is introduced into the water tank 101 through the inlet 102, the first sensor 107 measures the potential of the incoming water. When the water filled in the water tank 101 flows out of the water tank 101 through the outlet 103, the second sensor 108 measures the potential of the water flowing out.

The potential measured by the first sensor 107 and the second sensor 108 is transmitted to the controller 106, and the controller 106 transmits the potential measured by the first sensor 107 and the second sensor ( The potential difference of the electric potential measured by 108 is calculated. Therefore, when the calculated potential difference is a predetermined set value, for example, 20 mV or more, the solenoid valve 105 is closed, whereby chlorine injection into the water tank 101 is blocked.

When the calculated potential difference is equal to or less than a predetermined set value, for example, 20 mV, the solenoid valve 105 is opened, so that chlorine injection into the water tank 101 is continued, so that chlorine disinfection is continuously maintained.

On the other hand, when chlorine injection into the water tank 101 is blocked, the transmitter transmits a predetermined signal to the water supply manager under the control of the control unit 106. That is, a signal indicating that a problem has occurred in chlorine disinfection, for example, a text signal or an emergency contact number, is transmitted to the water supply manager.

Accordingly, even if the water supply manager is not always present in the chlorine automatic supply device, automatic supply of chlorine is automatically performed, and when a problem occurs, the water supply manager can be called immediately, thereby reducing the cost of manpower deployment. .

And, by supplying the optimum amount of chlorine into the water tank 101, the chlorine disinfection effect is excellently improved, the disinfection performance can be improved.

As described above, according to the automatic chlorine supply apparatus according to the present invention, by supplying the optimum amount of chlorine to the water flowing into the water tank 101, the disinfection performance that can disinfect the water flowing into the water tank 101 In addition, it is possible to obtain the effect of automatically notifying the water supply manager of an abnormal condition in case of abnormal disinfection work.

Claims (3)

In the chlorine automatic feeding device, A water tank 101 having an inlet 102 and an outlet 103; A chlorine storage chamber 104 installed at an adjacent point of the inlet 102 and storing chlorine therein; A valve body (105) mounted to the chlorine storage chamber (104) to open and close the flow of chlorine from the chlorine storage chamber (104) to the water tank (101); A first sensor (107) installed at the inlet (102) portion of the water tank (101) to measure the redox potential of water introduced into the water tank (101); A second sensor (108) installed at the outlet (103) to measure the redox potential of the water flowing out from the water tank (101); When the potential difference between the first potential measurement measured by the first sensor 107 and the second potential measurement measured by the second sensor 108 is greater than or equal to a predetermined potential, the valve body 105 is opened to open the chlorine. Chlorine in the storage chamber 104 is discharged to the water tank 101, and when the potential difference is less than a predetermined potential, the valve body 105 is closed so that the chlorine in the chlorine storage chamber 104 is discharged to the water tank 101. A control unit 106 for blocking the discharge to the tank 101; And When the potential difference is out of a predetermined range, the transmitter for notifying the water supply administrator of disinfection abnormalities, including, Chlorine automatic supply device, characterized in that to disinfect the water by injecting the optimum amount of chlorine into the water stored in the water tank (101). The chlorine automatic supply apparatus according to claim 1, wherein the first sensor (107) and the second sensor (108) are each formed of a combination type redox electrode and are of an epoxy body. delete