KR20130110773A - Sterilizing apparatus without adding salt and control method threrof - Google Patents

Abstract

PURPOSE: A sterilizer without adding salt and a control method thereof are provided to facilitate use as adding additional salt is not needed and to minimize maintenance cost and management cost. CONSTITUTION: A sterilizer without adding salt comprises an electrolytic bath (10), a rectifier (20), and a controller (30). The electrolytic bath generates remaining chlorine converting chlorine ions, which are naturally present in the raw water, into hypochlorous acids and hypochlorous acid ions by electrolyzing the raw water which flows in pipes. The rectifier applies direct current to a positive electrode and a negative electrode of the electrolytic bath. The controller controls an amount of current applied to the electrolytic bath according to the concentration of the remaining chlorine to maintain the concentration of the remaining chlorine with a predetermined concentration passing through the electrolytic bath. [Reference numerals] (30) Controller

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sterilizing apparatus,

Disclosure of the Invention The present invention relates to a method for disinfecting water such as water purification process water and purified water, a drainage pipe, a pipe line pipe, bottled water, a village water supply, a small water supply facility, ground water, The present invention relates to a disinfection apparatus for disinfection and a control method thereof, which can sterilize water in the most environmentally friendly manner using only chlorine ions naturally present in water without addition.

Generally, people are getting more and more income as they enter the modern age, so their living standards are getting higher, and there is a growing need to use clean water or high-quality water for drinking water as well as general living water such as washing water.

Accordingly, as water purification and sterilization have become more and more popular, apparatuses and methods have been proposed that perform various water purification and sterilization functions. In general, water purification is performed by using various filters and the like. A chlorine-based chemical sterilizing agent, or sterilization apparatuses using ozone, ultraviolet rays, ultrasonic waves, electrolysis, or the like.

In particular, chlorine disinfection is carried out at the water purification plant to suppress the propagation of disinfection and microorganisms, and it is sent to general use place (home or workplace). At this time, the concentration of hypochlorous acid (HOCl) and hypochlorite ion (OCl ^- ) (hereinafter referred to as residual chlorine concentration) is about 0.2 to 0.7 ppm. Since the concentration of residual chlorine decreases during sending water to a general use A chlorine input facility is installed to re-introduce chlorine into the intermediate reservoir.

As a method of re-introducing chlorine, a chlorine gas generator, a sodium chloride hypochlorite (NaOCl), or a sodium chloride generator (NaCl) is used.

As described above, sodium hypochlorite (NaOCl) or salt (NaCl) must be added to disinfect water in a water purification plant or a reservoir, which complicates the structure and makes maintenance and management difficult.

Disclosed is a disinfection apparatus for disinfecting water using a conventional electrolytic bath, as disclosed in Patent Publication No. 10-0492969 (May 25, 2005), a microfilter for filtering incoming water and a microfilter A water softening tank for removing the mineral magnesium, calcium and the like contained in the water passed through the water softening tank; a salt water storage tank for putting salt into the water passing through the water softener; and water stored in the salt water storage tank is supplied to generate sodium hypochlorite And an electrolysis tank for sterilizing water.

However, in the case of the conventional on-site production chlorine apparatus, salt is required to be added to generate sodium hypochlorite (NaOCl) in the electrolytic bath. Therefore, a constitution such as a brine storage tank is required, An injection device or the like is required, which complicates the structure, increases maintenance cost, and is difficult to manage.

In addition, since the conventional field-made chlorine apparatus is electrolyzed by putting salt into the electrolytic bath, there is a problem that chlorate and bromate are generated when producing a high concentration oxidant.

Patent Registration No. 10-0492969 (May 25, 2005)

Accordingly, it is an object of the present invention to provide a method for producing hypochlorous acid (HOCl) and hypochlorite ion (OCl ^- ) using only chlorine ions (Cl ^- ) naturally present in water without using any chemicals or chemicals, And it is possible to minimize the maintenance and management cost, and a control method thereof.

Another object of the present invention is to provide a method for producing hypochlorous acid (HOCl) and hypochlorite ion (OCl ^- ) using only chlorine ions (Cl) naturally present in water, Which is environmentally friendly and capable of improving water quality, has a high dissolved oxygen concentration, and is capable of producing weakly alkaline water, and a control method thereof.

It is another object of the present invention to provide a disinfection device for disinfecting the entire raw water, and a disinfection device for disinfecting a part of the raw water, The present invention also provides a disinfection apparatus and a control method thereof that can be easily installed in existing facilities, can be easily quantified and automated, and can simplify the structure, thereby minimizing the manufacturing cost.

It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to provide further explanation of the invention as claimed. .

In order to achieve the above object, the untreated salt disinfecting apparatus of the present invention is installed in a pipe through which raw water flows, and electrolyzes the raw water to convert chlorine ions naturally present in the raw water into hypochlorous acid and hypochlorous acid ions to produce residual chlorine A controller for controlling the amount of current applied to the electrolytic bath according to the residual chlorine concentration so as to maintain the concentration of the residual chlorine generated while passing through the electrolytic bath at a predetermined concentration, And a control unit.

The electrolytic bath of the present invention is installed in a pipe through which raw water flows and disinfects the entire raw water flowing through the pipe (residual chlorine is generated) and a bypass channel connected to the pipe through which the raw water flows, And a type in which the data is generated).

The electrolytic bath of the present invention includes a housing having an inlet through which raw water flows into one side, a discharge port through which sterilizing water passing through the electrolytic bath is formed, and a positive electrode and a negative electrode which are alternately arranged in the inside of the housing, The negative electrode is characterized in that an electrode coated with a Pt group metal oxide is used.

The housing of the present invention is characterized in that the housing has an inlet formed at one side of the lower surface, a discharge port formed at the other edge of the upper surface in the diagonal direction with respect to the inlet, a first inclined surface formed at the other edge of the lower surface, And a second inclined surface is formed at an edge.

One side surface of the positive electrode of the present invention protrudes from one side of the negative electrode, a plurality of first terminal rods are mounted on the protruding portion, the other side surface of the negative electrode protrudes from the other side of the positive electrode, And a two-terminal rod is mounted.

A residual chlorine concentration measuring instrument for measuring the residual chlorine concentration is mounted on the rear side piping of the electrolytic bath and the flow rate measuring instrument and the residual chlorine concentration And the signal measured in the measurement is applied to the controller.

In the control method of the unglycosylating device of the present invention, the raw water introduced into the electrolytic cell is electrolyzed to convert chlorine ions (Cl ^- ) contained in the raw water into hypochlorous acid (HOCl) and hypochlorite ion (OCl ^- ) Determining whether the residual chlorine concentration contained in sterilized water having passed through the electrolytic bath is within a predetermined concentration range; increasing the amount of current applied to the electrolytic bath if the residual chlorine concentration is equal to or lower than the predetermined concentration; And decreasing the amount of current applied to the electrolytic bath when the concentration of the electrolytic solution is equal to or higher than the set concentration.

As described above, according to the present invention, the ungalvanized disinfecting apparatus of the present invention can generate hypochlorous acid (HOCl) and hypochlorite ion (OCl ^- ) using only chloride ion (Cl ^- ) naturally present in water So that there is no need to add a separate salt, so that it is convenient to use, and the maintenance and management cost can be minimized.

The disinfection apparatus of the present invention can generate hypochlorous acid ions (OCl ^- ) using only chlorine ions (Cl) naturally present in the water, thereby generating disinfection by-products resulting from the addition of a separate medicine or salt There is no fear that it can be environmentally friendly, can improve the water quality, can increase the concentration of dissolved oxygen, and has the advantage of generating weakly alkaline water.

Further, since the untreated salt disinfecting apparatus of the present invention generates concentration of residual chlorine of 1 ppm (5 ppm) or less directly in accordance with the concentration in the field, instead of generating and diluting a high concentration oxidant, it is generated by diluting a high concentration oxidant (chlorine gas) It is possible to remarkably lower the generation of chlorate and bromate.

In addition, since the apparatus for disinfection and disinfection of the present invention requires only an electrolytic cell for electrolyzing raw water, a rectifier for applying a direct current to the electrolytic bath, and a controller for controlling the amount of current applied to the electrolytic bath, It is easy to quantify and automate, and the structure is simplified, so that the manufacturing cost can be minimized.

1 is a block diagram of a disinfecting apparatus according to an embodiment of the present invention.
2 is a configuration diagram of a disinfecting apparatus according to another embodiment of the present invention.
3 is a perspective view of an electrolytic cell according to an embodiment of the present invention.
4 is a side view of an electrolyzer according to an embodiment of the present invention.
5 is a cross-sectional view of an electrolyzer according to an embodiment of the present invention.
6 is a flowchart illustrating a method of controlling a disinfecting apparatus according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The sizes and shapes of the components shown in the drawings may be exaggerated for clarity and convenience. In addition, terms defined in consideration of the configuration and operation of the present invention may be changed according to the intention or custom of the user, the operator. Definitions of these terms should be based on the content of this specification.

FIG. 1 is a block diagram of a disinfection apparatus according to an embodiment of the present invention, and FIG. 2 is a block diagram of a disinfection apparatus according to another embodiment of the present invention.

The apparatus for disinfection and disinfection according to an embodiment of the present invention is a device for electrolyzing raw water to convert chlorine ion (Cl ^- ) contained in raw water into hypochlorous acid (HOCl) and hypochlorite ion (OCl ^- (Hereinafter referred to as "residual chlorine concentration") or a flow rate of an electrolytic bath 10, a rectifier 20 for applying a direct current to the electrolytic bath 10, a hypochlorite ion (OCl ^- ) concentration And a controller 30 for controlling the voltage.

1, when the raw water is of a small capacity, a disinfecting device is installed between the piping 100 to electrolytically treat the entire raw water, The bypass flow path 120 is connected to one side of the piping 100 through which the raw water flows and then the sterilization device 120 is connected to the bypass flow path 120. In this case, A part of the raw water is sterilized, and then the raw water is blended with the raw water flowing through the pipe 100.

Here, raw water is water used for process water, water, reservoir, pipe line, bottled water, village water, small-scale water facility, ground water, spring water, drinking spring water, swimming pool and ballast water.

As described above, the untreated disinfection apparatus according to the present embodiment does not need to input sodium chloride (NaCl) or chemicals. Therefore, the electrolytic bath 10 for electrolyzing the raw water, the rectifier 20 for applying a direct current to the electrolytic bath 10 And a controller 30 for controlling the electrolytic bath 10, it is possible to simplify the structure by eliminating the need for a conventional brine storage tank, a brine injection device, an oxidant storage tank, a metering pump, and a dilution mixing injection device .

In the ungaluminized disinfection apparatus according to the present embodiment, since installation is completed when the raw water is connected to the piping 100 through which the raw water flows, the piping can be easily applied and can be applied to existing piping to improve compatibility.

A flow meter 40 for measuring the flow rate of the raw water passing through the pipeline 100 is provided at one side of the pipeline 100 and is provided in the pipeline 10 connected to the rear side of the electrolyzer 10, And a residual chlorine concentration meter 42 for measuring the residual chlorine concentration. A pump 44 for pumping raw water and introducing the raw water into the electrolytic bath 10 is provided on the front and rear sides of the electrolytic bath 10.

3 to 5, the electrolytic bath 10 is provided with an inlet 14 through which raw water flows into one side and a housing 12 with a closed form in which an outlet 16 through which sterilized water is discharged is formed on the other side A positive electrode 50 arranged at a predetermined interval inside the housing 12 and electrically connected to the rectifier 20 and a negative electrode 50 arranged between the positive electrodes 50 and electrically connected to the rectifier 20, (52).

The housing 12 can improve the electrolysis efficiency by making the raw water passing through the inside of the housing evenly contact with the electrodes 50 and 52 arranged inside the housing.

For this, the housing 12 according to the present embodiment has an inlet 14 formed at one corner of the lower surface and a first inclined surface 60 inclined at a predetermined angle at the other corner of the lower surface. A discharge port 16 is formed at one corner of the top surface of the housing 12, that is, at a corner portion positioned in a diagonal direction with respect to the inlet port 14, and the other edge portion of the upper surface of the housing 12, that is, the first inclined surface 60 And the second inclined surface 62 is formed at a corner portion positioned in the diagonal direction.

The raw water flowing into the inlet 14 is guided by the first inclined surface 60 and is evenly distributed to a portion far from the inlet 14. The sterilized water generated while passing between the electrodes 50 and 52 is guided by the second inclined surface 62 and is smoothly discharged through the discharge port 16.

The positive electrode 50 and the negative electrode 52 are alternately arranged and are plate-type electrode plates, and a DSA (Dimensionally Stable Anode) electrode can be used.

The positive electrode 50 and the negative electrode 52 are insoluble electrodes coated with a Pt group metal oxide. Specifically, the surfaces of the electrodes 50 and 52 are made mainly of an iridium (Ir) compound, a ruthenium (Ru) compound and a tin (Sn) compound, and a titanium (Ti) compound, a molybdenum (Ta) compound and a zirconium (Zr) compound.

Chloride can be used for each element compound of the coating layer, and the thickness of the coating layer is 3 to 10 mu m which can carry electric current without peeling. This is because when the thickness of the coating layer is less than 3 mu m, the coating layer may be damaged by friction or hydrogen bubbles. When the thickness exceeds 10 mu m, coarse grains or abnormal grains are formed due to sintering during pyrolysis of the compound, This is because there is room for it.

One surface of the positive electrode 50 is disposed so as to protrude outward from one surface of the negative electrode 52. The protruded portion has a plurality of first terminal rods 50 connected to an external power source and maintaining a gap between the negative electrodes 50, (Not shown).

One surface of the cathode electrode 52 is disposed so as to protrude outwardly from one surface of the anode electrode 50. The protruded portion is connected to an external power source and has a plurality of second terminals The rod 56 is mounted.

The controller 30 is provided with a display unit to display a current flow rate, residual chlorine concentration, and the like, and to send a warning signal when an abnormality occurs in the disinfecting apparatus.

The control method of the ungalactic acid disinfection apparatus according to one embodiment thus constructed will be described below.

FIG. 6 is a flowchart illustrating a method for controlling the disinfection apparatus according to an embodiment of the present invention.

First, when the driving motor 44 is driven in the state where the raw water flows into the pipe 100, some or all of the raw water flowing in the pipe 100 flows into the electrolytic bath 10. Then, when the controller 30 is turned on, a direct current is applied to the positive electrode 50 and the negative electrode 52 through the rectifier 20 to electrolyze the raw water flowing into the electrolyzer 10. Then, the chlorine ion (Cl ^- ) contained in the raw water is converted into sterilizing water by converting sterilizing substances into hypochlorous acid (HOCl) and hypochlorite ion (OCl ^- ).

At this time, tap water or ground water is used as raw water, and the concentration of chlorine ions naturally present in tap water or ground water is about 10 to 50 PPM. This embodiment disinfection chlorine ion (Cl ^-) hypochlorite ion (OCl ^-) of up to about 40-50% if referred to the minimum the chlorine ion content 10PPM since economically to change the hypochlorite ion concentration About 4.0 to 5.0 PPM.

Therefore, it is possible to produce hypochlorous acid (HOCl) and hypochlorite ion (OCl ^- ) which can sterilize raw water by using only chlorine ion (Cl ^- ) naturally contained in raw water without adding sodium chloride or disinfectant. .

Also, the disinfection apparatus according to the present embodiment is superior in disinfection, COD removal, and ammonia nitrogen removal performance by an electric field as the rate of the flow rate passing through the disinfection apparatus becomes higher.

The sterilized water that has passed through the electrolytic bath 10 is delivered to each home or business through the piping 100.

The hypochlorite ion concentration (residual chlorine concentration) contained in the sterilized water passing through the electrolytic bath 10 must be kept constant regardless of the flow rate through the piping.

To this end, the controller 30 controls the chlorine concentration control system for controlling the amount of current applied to the electrolyzer 10 according to the residual chlorine concentration and the chlorine concentration control system for controlling the amount of current applied to the electrolyzer 10 according to the flow rate passing through the pipe 100 And a hybrid control method of controlling the amount of current applied to the electrolytic bath 100 by combining the current chlorine concentration and the flow rate can be used.

In the case of the chlorine concentration control system, the residual chlorine concentration measuring instrument 42 provided in the piping 100 located behind the electrolyzer 10 measures the residual chlorine concentration and transmits the signal to the controller 30. Then, when it is determined that the residual chlorine concentration is lower than the set concentration in accordance with the signal applied from the residual chlorine concentration meter 42, the controller 30 increases the amount of current applied to the electrolytic bath 10, The amount of current applied to the electrolytic bath 10 is lowered.

In the case of the flow rate control method, the flow rate measuring device 40 installed in the piping 100 measures the flow rate of the raw water passing through the piping 100 and applies the signal to the controller 30. Then, the controller 30 increases the amount of current applied to the electrolytic bath 10 if the flow rate is greater than the set flow rate according to the signal applied from the flow meter 40. If the flow rate is less than the set flow rate, .

At this time, if it is determined that the raw water does not flow to the pipe 100 according to a signal applied from the flow meter 40, the controller 30 stops the drive motor 44 and turns off the power applied to the electrolyzer 10 (OFF) to protect the electrolyzer (10).

The controller 30 controls the amount of current applied to the electrolytic bath 10 by combining the signal applied from the current chlorin concentration meter 42 and the signal applied from the flow meter 40, 10) in the sterilized water is kept constant.

As described above, the disinfection apparatus according to the present embodiment can generate hypochlorous acid (HOCl) and hypochlorous acid ions (OCl ^- ) which are sterilized by using only chlorine ions (Cl ^- It is not necessary to separately supply medicines, so that facility maintenance and management are convenient, and maintenance and management costs can be remarkably lowered.

In the case of the conventional salt injection method, a tank for storing salt water and a salt water input device are required. In the ungreater disinfection device according to the present embodiment, since salt injection is not necessary, the structure is simple, And the manufacturing cost can be reduced.

In the ungalactic disinfecting apparatus according to the present embodiment, it is not necessary to input the salt or the medicine, so that it is possible to make clean water because there is no contamination due to by-products caused by the input of salt or medicine.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be construed as limited to the embodiments set forth herein. Various changes and modifications may be made by those skilled in the art.

10: electrolytic bath 20: rectifier
30: controller 40: flow meter
42: residual chlorine concentration measuring instrument 44: pump
12: housing 14: inlet
16: outlet 50: positive
52: negative electrode 54: first terminal rod
56: second terminal rod 60: first inclined surface
62: second inclined surface

Claims (8)

An electrolytic cell installed in a pipe through which raw water flows and electrolyzing the raw water to convert chlorine ions naturally present in the raw water into hypochlorous acid and hypochlorous acid ions to produce residual chlorine;
A rectifier for applying a direct current to the positive electrode and the negative electrode of the electrolytic cell; And
And a controller for controlling the amount of current applied to the electrolytic cell according to the residual chlorine concentration to maintain the residual chlorine concentration generated while passing through the electrolytic cell. The method of claim 1,
The electrolytic cell is installed in the pipe through which the raw water flows to sterilize the entire raw water flowing through the pipe,
Salt-free disinfection device and control method, characterized in that any type of disinfection is used to sterilize some of the raw water is installed in the bypass flow path connected to the raw water flowing pipe. The method of claim 1,
The electrolyzer has a housing in which raw water is introduced into one side, and a discharge port through which the sterilizing water passing through the electrolyzer is discharged; And
A positive electrode and a negative electrode arranged to face each other in turn in the housing;
The positive electrode and the negative electrode are salt-free disinfection device, characterized in that the electrode coated with a Pt group metal oxide. The method of claim 3,
The housing has an inlet formed at one side edge of the lower surface, an outlet formed at the other edge of the upper surface in the diagonal direction with respect to the inlet, a first inclined surface formed at the other edge of the lower surface, Wherein a second inclined surface is formed. The method of claim 3,
Wherein one side of the positive electrode protrudes from one side of the negative electrode, a plurality of first terminal rods are mounted on the protruding portion, the other side of the negative electrode protrudes from the other side of the positive electrode, Characterized in that a rod is mounted. The method of claim 1,
And a residual chlorine concentration measuring device for measuring the residual chlorine concentration is mounted on the rear side piping of the electrolytic bath, and the flow rate measuring device and the residual chlorine concentration measuring device Wherein the measured signal is applied to the controller. Electrolyzing raw water introduced into the electrolytic cell to convert chlorine ions (Cl ⁻ ) contained in the raw water into hypochlorite (HOCl) and hypochlorite ions (OCl ⁻ );
Determining whether the residual chlorine concentration contained in the sterilized water passing through the electrolytic cell is within a set concentration range; And
If the residual chlorine concentration is less than the set concentration increase the amount of current applied to the electrolytic cell, If the residual chlorine concentration is higher than the set concentration, the control method of the salt-free disinfection device comprising the step of lowering the amount of current applied to the electrolytic cell. The method of claim 7, wherein
The method for controlling the amount of current applied to the electrolytic cell is a chlorine concentration control method for measuring and controlling the residual chlorine concentration, a flow control method for controlling the flow rate through the pipe, a complex control method for controlling the sum of the chlorine concentration and the flow rate Control method of a salt free disinfection device, characterized in that any one of the methods are used.

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