KR101347905B1 - Electrolyzed-chlorine generator and electrolyzed-chlorine generation system - Google Patents

Abstract

The present invention relates to an electrolyzed-chlorine generator and an electrolyzed-chlorine generation system and, more specifically, to an electrolyzed-chlorine generation system comprising a water softener (100) for softening incoming raw water; a soft water storage tank (200) for storing soft water; a soft water supply pump (300) for supplying soft water from the soft water storage tank (200); an electrolyte storage tank (400) for supplying electrolyte; an electrolyte supply pump (500) for supplying electrolyte from the electrolyte storage tank (400); a flow measurement tool (600) for recognizing the flow and stream of the soft water and electrolyte being supplied by the soft water supply pump (300) and the electrolyte supply pump (500); an electrolytic cell (700) including reaction parts (20, 30) for containing electrodes for electrolysis and a U-shaped electrolyte supply pipe (10) integrated with a gas-liquid separating reaction part (40) for separating electrolyzed chlorine and gas product generated by the reaction parts (20, 30) to react and having the function of exchanging heat, and having the terminal part thereof composed in an insulation structure; a storage tank (800) for storing the electrolyzed chlorine generated by the electrolytic cell (700); and an electrolyzed chlorine input pump (900) for transferring the stored electrolyzed chlorine to a required place. [Reference numerals] (100) Water softener; (200) Soft water storage tank; (300) Soft water supply pump; (400) Electrolyte storage tank; (500) Electrolyte supply pump; (600) Flow measurement tool; (700) Electrolytic cell; (800) Electrolyzed chlorine storage tank; (900) Electrolyzed chlorine input pump; (AA) Power device; (BB) Input

Description

Electrochlorine generator and its generating system {Electrolyzed-chlorine generator and electrolyzed-chlorine generation system}

The present invention relates to an electrochlorine generating device and a generating system thereof, and more particularly, to an apparatus and a generating system for generating electrolytic chlorine sodium hypochlorite and hypochlorous acid by electrolysis of an electrolyte such as dilute brine or dilute hydrochloric acid. . Electrolytic chlorine manufacturing apparatus having a heat dissipation structure and a generating system having a heat dissipation structure at an electrode terminal part with a gas-liquid separation reaction part equipped with an electrode-aligned electrolytic cell having a parallel-parallel mixed structure, a filler, and a U-shaped electrolyte supply pipe to improve the electrolytic efficiency It is about.

Electrochlorine refers to sodium hypochlorite and hypochlorous acid, and electrochlorine is a disinfectant and bleach agent for disinfection treatment in water purification plants, sterilization equipment in sewage treatment plants, desalination process water, cooling water treatment in power plants, drinking water treatment, swimming pools and papermaking, and household use. As a liquid with strong chlorine odor, it is produced by electrolyzing an electrolyte such as saline solution or dilute hydrochloric acid in a membrane-free electrolytic cell to which a dimensionally stable electrode is applied.

1 shows a general structure of a sodium hypochlorite generating device which is one of the conventional electrolytic chlorine generating device. The electrolytic cell in which the dimensional stabilizing electrode is applied to produce sodium hypochlorite is generally in the form of an electrolytic cell having an I-shaped flow path. When the I-shaped flow path is applied, the electrolyte passes through the electrode and has a disadvantage in that the reaction time is short. If the electrolysis reaction time is short, the reaction time between the electrolyte and the electrode is shortened, and there is a problem in that the conversion rate at which the electrolyte is converted to sodium hypochlorite is reduced as a result of the generation of an electrolyte that does not react. In order to increase the electrolytic reaction time of the electrolyte, that is, the time of electrolytic reaction through the electrode, the length of the flow path must be increased. In other words, if the electrode is increased in the longitudinal direction and narrowed in the width direction, or if a plurality of electrolyzers are connected, the length of the flow path may be increased, thereby increasing the electrolytic reaction time, but the size of the electrolyzer may be increased and the configuration of the apparatus itself may be increased. There is a complicated problem.

In addition, in order to generate sodium hypochlorite by the electrolytic reaction, direct current is applied from the power supply device to the internal electrode through the positive and negative terminal parts. When DC power is supplied, heat is generated by the contact resistance and the internal resistance. When heat is generated in the terminal portion, resistance increases due to heat generation, and thus, more electrical energy is consumed than necessary, resulting in a decrease in electrolytic efficiency.

In particular, since a large current is required to generate a large amount of sodium hypochlorite, the size of the positive and negative terminal portions for supplying the direct current electrical energy to the electrolytic cell must be enlarged, and the cross-sectional area of the electric wires supplying the direct current connected to the terminal portion must also be increased. As a result, the size of the sodium hypochlorite generating device is increased.

When sodium hypochlorite is produced in the electrolytic cell with dimensional stability electrode, hydrogen gas is generated on the negative electrode side of the electrolytic cell. The generated hydrogen and sodium hypochlorite are discharged through the outlet of the electrolytic cell, and sodium hypochlorite is stored in the storage tank through gas-liquid separation. Hydrogen is discharged to the outside. In this process, an unreacted portion of chlorine (Cl ₂ (g)) produced by the electrolytic reaction exists, which is also discharged to the outside with hydrogen, resulting in a decrease in the electrolytic reaction efficiency in the electrolytic cell. .

On the other hand, Korean Patent No. 10-0736155 ("Sodium hypochlorite generating device", hereinafter referred to as prior document 1) in the apparatus for producing sodium hypochlorite by electrolysis of the dilute brine mixed with the incoming water and saturated brine in a certain ratio In the above, the inlet water supply tank having a float valve is installed between the water supply pipe and the supply pipe connected to the dilute brine supply hole of the electrolysis tank, wherein the inlet water supply tank is installed at a position higher than a height of the electrolysis tank, Disclosed is a sodium hypochlorite generator, characterized in that an electronic valve is installed between a water discharge hole of an incoming water supply tank and a flow meter of a supply pipe and is automatically closed when there is no supply of electricity.

Domestic Patent No. 10-0736155 (Registration Date 2007.06.29.)

The present invention has been made to solve the problems of the prior art as described above, an object of the present invention is the flow path for electrolytic reaction by forming a U-shaped flow path of the first reaction unit and the second reaction unit for the electrolytic chlorine production In order to increase the length and the electrolysis reaction time, and to increase the gas-liquid contact area, a packing material is provided in the gas-liquid separation reaction unit so that the chlorine, which is not converted, can be reacted again while passing through the dimensionally stable electrode. Electrolytic chlorine generating device and its generating system to increase the temperature of the electrolyte by forming a U-shaped flow path to supply the electrolyte to the first reaction portion through the reaction portion and to increase the electrolytic efficiency by minimizing heat generation through the heat radiation structure in the electrolytic reaction terminal portion To provide.

Electrolytic chlorine generating apparatus according to an embodiment of the present invention, the first reaction unit 20, electrolytic chlorine generated by the electrolytic reaction of the electrolyte introduced through the electrolyte supply pipe 10, the first reaction unit 20 Electrolyte chlorine introduced through the second reaction unit 30 and the second reaction unit 30 and the electrolytic product generated by the electrolysis reaction of the unreacted electrolyte of the electrolytic product and the unreacted electrolyte introduced through It is characterized in that it comprises a gas-liquid separation reaction unit 40 for separating and reacting the gas product gas-liquid.

Here, the electrolytic chlorine is characterized in that sodium hypochlorite or hypochlorous acid.

At this time, the first reaction unit 20 and the second reaction unit 30 are positive and negative terminal portions for supplying direct current electricity from the power supply to the internal electrode, one or more positive electrode and negative electrode pairs connected to the positive and negative terminal portions And a metal electrode disposed between the positive electrode and negative electrode pairs.

In addition, the metal electrode is not connected to the positive and negative terminal portions.

In addition, the gas-liquid separation reaction unit 40 is located on top of the first reaction unit 20 and the second reaction unit 30, the filling material to increase the internal gas-liquid contact area of the gas-liquid separation reaction unit 40 It further comprises.

In addition, the electrolyte supply pipe 10 is made of a U-shaped, characterized in that the heat exchange by the electrolytic cell reaction heat,

The positive and negative terminal portions are characterized in that the air-cooled or water-cooled heat dissipation means is provided.

Electrolytic chlorine generating system according to an embodiment of the present invention, softener 100 for softening the incoming raw water, soft water storage tank 200 for storing the soft water, soft water for supplying soft water from the soft water storage tank 200 Supply pump 300, the electrolyte storage tank 400 for supplying the electrolyte, the electrolyte supply pump 500 for supplying the electrolyte from the electrolyte storage tank 400, the soft water supply pump 300 and the electrolyte supply pump ( Flow rate detection means 600 for recognizing the flow rate and flow of the soft water and the electrolyte supplied from 500, the reaction unit (20, 30) for receiving the electrolytic reaction by receiving the electrode, and generated in the reaction unit (20, 30) The gas-liquid separation reaction part 40 for separating and reacting the electrolyzed chlorine and gaseous products is integrated, and includes an electrolyte supply pipe 10 having a heat exchange function in a U-shape, and a terminal part having a heat dissipation structure. , Into the electrolytic cell 700 Emitter and the storage tank 800 and a chlorine electrolysis stored to store the generated electrolytic chlorine being configured to include a chlorine input pump 900 to be delivered to the transfer need place.

At this time, the reaction unit (20, 30) is the first reaction unit 20, the electrolytic chlorine is generated by the electrolytic reaction of the electrolyte introduced through the electrolyte supply pipe 10, and the first reaction unit ( A second reaction part 30 is formed in which the electrolytic product is generated by the electrolysis reaction of the unreacted electrolyte among the electrolytic product and the unreacted electrolyte introduced through 20).

Electrolytic chlorine generating device and the generation system of the present invention by the configuration as described above by forming a U-shaped flow channel consisting of the first reaction portion and the second reaction portion by increasing the length of the electrolytic reaction flow path and the electrolytic reaction time to increase the electrolytic efficiency Improve.

In addition, the electrolyte is supplied to the first reaction unit and the electrolytic chlorine electrolytically reacted in the first reaction unit and the unreacted electrolyte are electrolytically reacted in the second reaction unit, so that the unreacted electrolyte is converted to the electrolytic chlorine as much as possible, and the electrode Chlorine, which has not been converted into electrolytic chlorine in the reaction part, passes through the gas-liquid separation reaction part at the top of the electrode reaction part and passes through the filling in the gas-liquid separation part that increases the gas-liquid contact area. By doing so, there is an effect of increasing the electrolytic efficiency.

In addition, a U-shaped flow path is formed to supply electrolyte to the first reaction part through an electrolyte supply pipe for supplying an electrolyte to the electrolytic cell, and a material having good heat transfer to the material of the electrolyte supply pipe and having corrosion resistance to electrolytic chlorine is applied. When the temperature of the electrolyte is low, the temperature of the electrolyte is increased by the reaction heat of the electrode reaction part, and the two terminal parts in the electrolytic cell are connected to the heat dissipation structure so that the direct current is applied to the terminal part and the heat generated in the terminal part during the electrolytic reaction is dissipated. Through the heat dissipation to the outside quickly to minimize the heat generation of the terminal portion has the effect of improving the electrolytic efficiency.

1 is a block diagram of a conventional sodium hypochlorite generator having an I-shaped electrolytic cell.
2 is a block diagram showing an electrode alignment method of a parallel-parallel mixed structure according to an embodiment of the present invention.
3 is a block diagram showing an extended electrode sorting method of a parallel-parallel mixed structure according to an embodiment of the present invention.
4 is a configuration diagram of an electrolytic cell in which an electrode reaction part and a gas-liquid separation reaction part of a U-shaped flow path form according to an embodiment of the present invention are integrated.
5 is a cross-sectional view of an electrolytic diagram in which an electrode reaction part and a gas-liquid separation reaction part of a U-shaped flow path form according to an exemplary embodiment of the present invention are integrated.
6 is a configuration diagram of an electrolytic cell in which a U-shaped flow path-type reaction part and a gas-liquid separation reaction part are applied to a terminal according to an embodiment of the present invention.
7 is a block diagram showing an electrochlorine chlorine generating system according to an embodiment of the present invention.

Hereinafter, an electrochlorine chlorine generating device and a generating system thereof according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. The following drawings are provided by way of example so that those skilled in the art can fully understand the spirit of the present invention. Therefore, the present invention is not limited to the following drawings, but may be embodied in other forms. In addition, like reference numerals designate like elements throughout the specification.

In this case, unless otherwise defined, technical terms and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. In the following description and the accompanying drawings, A description of known functions and configurations that may unnecessarily obscure the description of the present invention will be omitted.

The electrolytic cell 700 of the electrolytic chlorine generating apparatus according to an embodiment of the present invention is an electrode reaction chamber and a gas-liquid separation reaction unit, and the electrode reaction chamber is divided into two electrode reaction chambers.

That is, the first reaction unit 20 to generate electrolytic chlorine by the electrolysis reaction of the electrolyte introduced through the electrolyte inlet unit 10, and the electrolytic generated by the electrolytic reaction in the first reaction unit 20 The chlorine and the unreacted electrolyte are introduced through the inner partition wall of the electrolytic cell to constitute an electrolytic cell composed of the second reaction part 30 which generates electrolytic chlorine by the electrolytic reaction of the unreacted electrolyte.

When salt (NaCl) is applied as an electrolyte introduced into the electrolytic cell 700, it is dissociated into sodium ions (Na ⁺ ) and chlorine ions (Chloride, Cl ⁻ ), and chlorine ions are oxidized to chlorine at the anode ( (Formula 1), sodium ions are reduced at the cathode to produce sodium (Formula 2).

At this time, the produced sodium reacts with water to form sodium hydroxide and hydrogen (Formula 3), and chlorine and sodium hydroxide produced at the anode react to form sodium hypochlorite, which is one of electrolytic chlorine (Formula 4). Referring to the reaction scheme of the generation of sodium hypochlorite as follows.

_{^{Cl - → Cl 2 + e -}} ① formula

Na ⁺ + e- → Na ②

Na + H ₂ 0 → NaOH + H ₂ ③

NaOH + Cl ₂ → NaOCl + HCl ④

In addition, when applying the diluted hydrochloric acid (HCI) as the electrolyte flowing into the electrolytic cell 700, the hydrogen ions (Hydrogen ion, H ⁺⁾ and chloride ion (Chloride, Cl ^-) is dissociated into chlorine ions in the positive electrode is oxidized chlorine (Formula 5), hydrogen ions are reduced at the negative electrode to produce hydrogen gas (Formula 6).

At this time, the generated chlorine reacts with water to produce hypochlorous acid (7). Referring to the formation scheme of such hypochlorous acid is as follows.

_{^{Cl - → Cl 2 + e -}} ⑤ formula

2H ⁺ + e- → H ₂ (g) ⑥

Cl ₂ + H ₂ 0 → HOCl + HCl ⑦

FIG. 2 shows an electrolytic cell 700 of an electrode alignment method having a series-parallel mixed structure including the first reaction part 20 and the second reaction part 30 in the present invention.

The anode and cathode terminal portions for dividing the electrode reaction chamber into two electrode reaction chambers and supplying the direct current electricity from the power supply device to the internal electrodes in order to cause the electrolytic reaction to the first reaction section 20 and the second reaction section 30. Each is provided.

In addition, the first reaction part 20 and the second reaction part 30 are connected through an internal partition wall, so that unreacted electrolyte in the first reaction part 20 flows into the second reaction part 30. To allow electrolytic reactions.

The first reaction part 20 and the second reaction part 30 of the electrolytic cell 700 are provided with electrodes having a series-parallel mixing structure.

As shown in FIG. 2, the series-parallel mixing structure is composed of a positive electrode, a negative electrode pair, and a metal electrode disposed therebetween, respectively, connected to the positive and negative terminal portions. Unlike the positive electrode and the negative electrode, the metal electrode is not directly connected to the positive terminal portion or the negative terminal portion.

However, the portion near the anode in the metal electrode emits electrons by the force of attracting electrons from the anode, and the portion near the cathode receives the electron by the force pushing the electrons out of the cathode.

FIG. 3 illustrates an electrode sorting form in which a basic series-parallel mixing structure is extended.

Repeatedly applying the electrode alignment structure of the parallel structure of the basic structure increases the length of the electrolytic reaction flow path and increases the electrolysis reaction time to minimize the unreacted electrolyte, thereby increasing the amount of electrochlorine generated. You can get it.

On the other hand, in the first reaction unit 20 and the second reaction unit 30 at the same time as the generation of electrolytic chlorine is also generated hydrogen by-product of the electrolytic reaction.

Hydrogen and electrolytic chlorine generated in the first reaction part 20 and the second reaction part 30 pass through the second reaction part 30 to an upper end part of the electrolytic cell 700, that is, the first and second electrodes. Hydrogen is discharged to the outside through the gas-liquid separation reaction unit 40 located at the top of the reaction unit, the electrolytic chlorine is transferred to the storage tank and stored.

4 illustrates an electrolytic cell in which an electrode reaction part and a gas-liquid separation reaction part of the U-shaped flow path are integrated, and FIG. 5 is a cross-sectional view of an electrolytic diagram in which the electrode reaction part and the gas-liquid separation reaction part of the U-shaped flow path are integrated.

At this time, the gas-liquid separation reaction part 40 is filled in the electrolytic cell 700 to fill the filler to increase the gas-liquid contact area of the unreacted electrolytic product (Cl ₂ (g)) to react again Increase the electrolytic efficiency.

In addition, as shown in FIGS. 4 and 5, the electrolyte supply pipe 10 for supplying the electrolyte to the electrolytic cell 700 has a U shape so that the electrolyte passes through the second reaction part 30 and the first reaction. To be fed through the end of section 20.

This is to prepare for the case where the temperature of the electrolyte injected into the electrolytic cell 700 is low, when the electrolyte of low temperature is supplied to the electrolytic cell 700, the electrolytic chlorine generation efficiency in the electrolytic cell 700 is lowered, the electrolytic cell ( The electrolyte supply pipe for transporting the electrolyte to the 700 reaches the first reaction part 20 via the second reaction part 30 to increase the length of the electrolyte supply pipe, and the electrolyte supply pipe is heated by the reaction tank reaction heat. To rise.

As such, when the temperature of the electrolyte supply pipe 10 rises, the temperature of the electrolyte passing through the electrolyte supply pipe is also increased by the electrolytic cell reaction heat, so that the electrolytic reaction efficiency can be increased.

At this time, the electrolyte supply pipe 10 is corrosion resistance to the electrochlorine, it is possible to apply titanium and other various materials (acrylic, PE, PP and PVC, etc.) excellent in heat transfer.

FIG. 6 illustrates a heat dissipation structure configured in the electrode terminal part to minimize heat generated in the positive and negative electrode terminal parts when electrolytic chlorine is generated by the electrolytic reaction in the electrolytic cell 700.

In the present invention, the heat dissipation structure is configured outside the terminal portion connected to the plurality of electrodes.

Therefore, the heat generated from the electrode terminal portion connected to the plurality of electrodes during the electrolytic reaction is quickly moved to a heat dissipation structure of a large surface area connected to the outside of the electrode terminal portion, thereby reducing the heat generated in the electrode terminal portion and the heat of the electrode connected to the electrode terminal portion, The increase in resistance due to the temperature rise of the electrode terminal portion can be minimized, thereby increasing the electrolytic reaction efficiency. If air cooling means such as a fan or cooling means such as water cooling is added to increase the cooling efficiency outside the heat dissipation structure, the heat generated from the terminal portion and the heat generated from each electrode in the electrode reaction portion can be radiated to the outside.

7 shows an electrochlorine generation system according to an embodiment of the present invention.

Electrolytic chlorine generating system according to an embodiment of the present invention is a softener 100 for softening the incoming raw water, a soft water storage tank 200 for storing soft water, a soft water supply pump for supplying soft water from the soft water storage tank 200 300, an electrolyte storage tank 400 for supplying an electrolyte, an electrolyte supply pump 500 for supplying an electrolyte from the electrolyte storage tank 400, from the soft water supply pump 300 and the electrolyte supply pump 500. Flow rate detection means 600 for recognizing the flow rate and flow of the soft water and the electrolyte supplied, the reaction unit (20, 30) and the electrolytic chlorine generated from the reaction unit (20, 30) for receiving the electrode electrolytic reaction and The gas-liquid separation reaction unit 40 for separating and reacting gas products is integrated, an electrolytic cell 700 including an electrolyte supply pipe 10 having a heat exchange function in a U-shape, and a terminal part having a heat dissipation structure, and the electrolytic cell ( Generated from 700) A storage tank (800), chlorine electrolysis stored to store the chlorine is configured to be delivered to the transfer requires location containing chlorine input pump 900.

As described above, the present invention has been described with reference to specific embodiments such as specific components and exemplary embodiments. However, the present invention is not limited to the above-described embodiments, And various modifications and changes may be made thereto by those skilled in the art to which the present invention pertains.

Accordingly, the spirit of the present invention should not be construed as being limited to the embodiments described, and all of the equivalents or equivalents of the claims, as well as the following claims, fall within the scope of the present invention .

10: electrolyte supply pipe 20: first reaction part
30: second reaction unit 40: gas-liquid separation reaction unit
100: water softener 200: soft water storage tank
300: soft water supply pump 400: electrolyte storage tank
500: electrolyte supply pump 600: flow rate detection means
700: electrolytic cell 800: storage tank
900: electrolytic chlorine input pump

Claims (9)

A first reaction part 20 in which electrolytic chlorine is generated by an electrolysis reaction of the electrolyte introduced through the electrolyte supply pipe 10;
A second reaction part 30 in which an electrolytic product is generated by an electrolysis reaction of the unreacted electrolyte among the electrolyte product and the unreacted electrolyte introduced through the first reaction part 20; And
A gas-liquid separation reaction part 40 for gas-liquid separation and reaction of the electrolytic chlorine and gaseous products introduced through the second reaction part 30;
And,
The first reaction unit 20 and the second reaction unit 30
Positive and negative terminal portions for supplying direct current electricity from the power supply to the internal electrodes;
At least one pair of positive and negative electrodes connected to the positive and negative terminal portions;
Electrolytic chlorine generating device disposed between the positive electrode and the negative electrode pair, characterized in that it comprises a metal electrode which is not connected to the positive and negative terminal portion.
The method of claim 1,
The electrochlorine is
Electrolytic chlorine generating device characterized in that the sodium hypochlorite or hypochlorous acid.
delete delete The method of claim 1,
The gas-liquid separation reaction unit 40
Located at the top of the first reaction unit 20 and the second reaction unit 30,
Electrolytic chlorine generating device further comprises a filler for increasing the internal gas-liquid contact area of the gas-liquid separation reaction portion (40).
The method of claim 1,
The electrolyte supply pipe 10 is
Electrolytic chlorine generating device consisting of a U-shaped form, the heat exchange by the electrolytic cell reaction heat is possible.
The method of claim 1,
The positive and negative terminal portions
Electrolytic chlorine generating device characterized in that the air-cooled or water-cooled heat dissipation means is provided.
Water softener 100 for softening the incoming raw water;
Soft water storage tank for storing the soft water (200);
Soft water supply pump 300 for supplying soft water from the soft water storage tank (200);
An electrolyte storage tank 400 for supplying an electrolyte;
An electrolyte supply pump 500 for supplying an electrolyte from the electrolyte storage tank 400;
Flow rate detecting means (600) capable of recognizing the flow rate and flow of the soft water and the electrolyte supplied from the soft water supply pump (300) and the electrolyte supply pump (500);
The reaction units 20 and 30 for receiving and reacting the electrodes and the gas-liquid separation reaction unit 40 for separating and reacting the electrolytic chlorine and gas products generated in the reaction units 20 and 30 are integrated. An electrolytic cell 700 including an electrolyte supply pipe 10 having a heat exchange function in a shape of a child and having a terminal portion having a heat dissipation structure;
A storage tank 800 for storing the electrolytic chlorine generated from the electrolytic cell 700; And
An electrolytic chlorine input pump 900 for transferring the stored electrolytic chlorine to a required place;
Electrolytic chlorine generation system characterized in that it comprises a.
The method of claim 8,
The reaction unit 20, 30
By the electrolysis reaction of the electrolyte introduced through the electrolyte supply pipe 10,
A first reaction unit 20 for generating electrolytic chlorine,
Electrolytic chlorine characterized in that the second reaction portion 30 is formed by the electrolytic reaction of the unreacted electrolyte of the electrolytic product and the unreacted electrolyte introduced through the first reaction unit 20 is formed Generation system.

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