KR200309987Y1 - Electrolysis apparatus - Google Patents

Abstract

The present invention relates to a device for producing sodium hypochlorite by electrolysis of brine, and more particularly to an electrolysis device that can wash the cations deposited on the negative electrode in the electrolysis device during the production of sodium hypochlorite.

The present invention is an electrolytic cell body with an electrode, a dilute saline supply pipe connected to the body portion for supplying dilute saline into the body portion, and the body for discharging sodium hypochlorite generated in the body portion An electrolysis device comprising a discharge pipe connected to the part, comprising: an electrode part inserted into the body part and coupled to a flange at both ends of the body part to supply power to the body part; A washing unit penetrating through an insertion hole formed in one flange of the body part and being inserted into and supported in an insertion groove formed in the flange of the other body part and including a washing tube for washing the electrode part in the body part; A pressurizing part coupled to a connection pipe coupled to one end of a washing tube passing through an insertion hole formed at one flange of the body part, for supplying a pressurized fluid to the washing tube; It is characterized by including.

Description

Electrolysis apparatus

The present invention relates to a device for producing sodium hypochlorite (NaOCl) by electrolysis of brine, more specifically, deposition on the cathode in the electrolysis device during the production of sodium hypochlorite (沈 着) It relates to an electrolysis device capable of washing the cations to be.

Sodium hypochlorite is used for water purification plant, sterilizer in sewage treatment plant, cooling water boiler in general chemical plant, desalination process water, cooling water treatment in power plant, drinking water treatment, plants and vegetables, meat processing, laundry and papermaking outside of swimming pool, household bleach It is a colorless transparent liquid with a strong chlorine odor.

In general, a non-diaphragm sodium hypochlorite generator electrolyzes salt in salt water by using direct current electrodes added to both sides of the dilute brine through a series of electrodes (anode and cathode) without a diaphragm (ion exchange membrane). do.

The brine flowing into the electrolyzer is sodium ion (Sodium ion, Na ⁺⁾ perchloric small ions (Chloride, Cl ^-) is dissociated into chlorine ions are oxidized at the anode, and a chlorine (① formula), sodium ions are reduced at the cathode Sodium is produced (② formula), and the produced sodium reacts with water to form sodium hydroxide (NaOH, caustic soda) and hydrogen (③ formula), and then the chlorine produced at the anode reacts with the sodium hydroxide to form hypochlorous acid. Sodium (NaOCl) is produced (4).

_{^{Cl - → 1 / 2Cl 2 +}} e - ------------------------ ① formula

^{Na + + e - → Na ------------------------} ② formula

Na + H ₂ O → NaOH + 1 / 2H ₂ -------------------- ③ Formula

NaOH + Cl ₂ → NaOCl + HCl -------------------- ④

The sodium hypochlorite produced as described above is a safe form of chlorine and is used as a chlorine disinfectant or oxidant in the field where disinfection or oxidation is required.

Although there are differences in concentrations in water obtained from nature, calcium (Ca ²⁺ ) and magnesium (Mg ²⁺ ) ions are always present, and cationic substances such as calcium and magnesium ions are deposited on the surface of the cathode during electrolysis. There is.

In the electrolysis process as described above, the phenomenon in which cationic materials such as calcium and magnesium ions are deposited on the surface of the cathode proceeds similar to the principle of electroplating.

When the deposition of cationic materials such as calcium and magnesium ions progresses between the anode and the cathode, an electrical short circuit occurs between the two poles, which may damage the electrode irreversibly, and the gap between the two poles. There is a problem in that the sodium hypochlorite production concentration is lowered as the saline is prevented by preventing the flow of saline to supply sufficient electrolyte.

Therefore, the sodium hypochlorite generating electrode of the general electrolytic apparatus depends on the hardness of the incoming water (amount of Ca ²⁺ , Mg ²⁺ ) and the amount of electrolysis, but should be cleaned regularly or from time to time.

For reference, the hardness refers to the hardness 1 when 1 ml of calcium oxide is contained in 100 cm ³ of water. Magnesium is converted into calcium oxide (1.4 MgO = 1 CaO).

Normally, 7 ~ 10% of HCl or acetic acid (醋酸, CH ₃ COOH) should be washed to remove cationic substances such as calcium and magnesium ions on the surface of the cathode at regular intervals.For this purpose, hydrochloric acid storage tanks, feed pumps and many There is a problem that the electrode cleaning device equipped with a valve must be installed separately.

Prior art for improving the resistance to the hardness of the salt water is disclosed in Republic of Korea Patent Publication No. 1998-19227 (June 5, 1998; hereinafter referred to as citation 1) salt storage tank to disinfect the water in the water purification plant After supplying salt into the water and water with a water softener, sodium hypochlorite is produced in an electrolysis tank and supplied to a water purification plant to provide a water treatment disinfection system for water purification plant.

In addition, Korean Patent No. 10-0323337 (January 23, 2002; hereafter referred to as Citation 2) provides a device for purifying pool water, hot springs, and bath water in public baths. Electrolytic passage to install and sterilize water with electrolyzed saline solution in between, and stirring device to add and sterilize the sterilized water to the circulating lake, and to contact the hypochlorous acid and sodium hypochlorite by-product of the electrolytic reaction The present invention relates to a catalytic device that decomposes and generates free radicals.

However, the above citations 1 and 2 could not solve the problem of the magnesium and calcium hardness present in the brine deposited on the electrode.

In addition, International Application Publication No. WO9816477 "METHOD TO REDUCE OR PREVENT SCALING" provides a method of removing the scale attached to the electrode by periodically switching the polarity of the electrode by using a bipolar electrode, which has already been used in industrially small electrolytic systems. This technique is being utilized, but this technique has a problem that cannot solve the problem that the durability of the electrode sharply decreases due to repeated polarity change.

The present invention has been made to solve the above problems, an electrolysis device that can easily remove the cations deposited on the cathode in the electrolysis device by installing a washing unit in the electrolysis device and spraying the pressurized fluid in the washing unit. The purpose is to provide.

1 is a front sectional view of an electrolysis device according to the present invention.

Figure 2 is an exploded perspective view of the electrolysis device according to the present invention.

Figure 3 is a perspective view showing the installation state of the positive electrode and the negative electrode in the electrolytic device body portion according to the present invention.

4 is a cross-sectional view taken along the line A-A of FIG.

Figure 5 is a system diagram showing an embodiment according to the pressurized fluid supplied to the electrolytic apparatus washing tube of the present invention.

6 is a cross-sectional view taken along line B-B in FIG.

Description of the main parts of the drawing

1: body portion 2: discharge pipe

3: supply pipe 4a: body flange

4b: coupling flange 5a: bolt

5b: nut 6a: anode plate electrode

6b: anode support plate 6c: anode pin

7a: cathode plate-shaped electrode 7b: cathode plate support plate

7c: negative pin 8: flexible connector

9: compressor 10a: washing tube

10b: nozzle 13: pump

14: circulation pipe 15: first valve

16: second valve

In order to achieve the above object, the present invention provides an electrolyzer body part having an electrode embedded therein, a dilute saline supply pipe connected to the body part to supply dilute saline to the inside of the body part, and an embryo generated in the body part. In the electrolysis device comprising a discharge pipe connected to the body portion for discharging sodium chlorate, is inserted into the body portion 1, coupled to the flange (4a) at both ends of the body portion 1 body portion (1) an electrode portion for supplying power therein; Penetrating through the insertion hole (4c) formed in the flange of one side of the body portion 1, is inserted into and supported in the insertion groove (4d) formed in the flange of the other side of the body portion 1 to clean the electrode portion in the body portion (1) A washing unit including a washing tube 10a for the washing machine; It is coupled to the connection pipe (8) coupled to one end of the washing tube (10a) passing through the insertion hole (4c) formed in one side flange of the body portion 1, the pressure for supplying a pressurized fluid to the washing tube (10a) To call; It provides an electrolysis device comprising a.

The body portion 1 is tubular, characterized in that consisting of a transparent material that can identify the electrode portion in the body portion.

The electrode portion is characterized by consisting of the anode portion and the cathode portion coupled to the flanges on both sides of the body portion (1).

Each of the anode and cathode portions of the electrode portion includes a plurality of plate-shaped electrodes 6a and 7a embedded in the body portion; Support plates 6b and 7b in which the plate-shaped electrode is coupled to and supported on one surface thereof; It is characterized in that consisting of; power supply pins (6c, 7c) coupled to the other surface of the support plate (6b, 7b) for receiving power.

In addition, the washing tube (10a) of the washing unit is characterized in that a plurality of nozzles (10b) for ejecting the pressurized fluid to the electrode side.

In addition, the pressurizing unit is characterized in that it consists of a compressor (9) to the pump (13) in accordance with the pressurized fluid supplied to the washing tube (10a).

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

1 is a front sectional view of an electrolysis device according to the present invention, FIG. 2 is an exploded perspective view of the electrolysis device according to the present invention, and FIG. 3 shows an installation state of an anode part and a cathode part in the body part of the electrolysis device according to the present invention. One cutaway perspective view, Figure 4 is a cross-sectional view AA of Figure 1, Figure 5 is a schematic diagram showing an embodiment according to the pressurized fluid supplied to the electrolytic apparatus washing tube of the present invention, Figure 6 is a cross-sectional view BB of Figure 5 .

With reference to Figures 1 and 2 will be described the configuration of the above-mentioned body portion, electrode portion, washing portion, pressurizing portion, it will be described the coupling relationship of each component to be assembled into the electrolysis device according to the present invention.

Body

The body portion 1 is formed of a transparent material for observing the flow state with the plate-shaped electrodes (6a, 7a) in the body portion 1 and is cylindrical. Body portion flanges 4a are fitted to the outer edges of both ends of the body portion 1 so that flange coupling is possible.

The outer edge of the body portion 1 and the body flange 4a are provided with sealing means such as a gasket and a sealing ring so that the body portion 1 is fitted to the body flange 4a.

In addition, the body portion 1, as shown in Figures 1 and 2, the sodium hypochlorite discharge pipe (2) and dilute saline supply pipe (3) is connected to the body portion (1).

The sodium hypochlorite discharge pipe (2) and the dilute brine supply pipe (3) is a hole in the body portion (1), and then form a coupling recess in the sodium hypochlorite discharge pipe (2) and dilute brine supply pipe (3) and gasket It can be combined with a sealing means, such as a sealing ring, or can be integrally cast to meet the requirements of the electrolysis device.

Electrode part

The electrode part is a component built in the body part 1. As shown in FIG. 2, the electrode part includes an anode part and a cathode part, and a plurality of anode part plate electrodes 6a and cathode part plate electrodes 7a are integrally coupled to the supporting plates 6b and 7b. The surfaces of the anode and cathode plate electrodes 6a, 7a are vertically disposed within the body portion 1, and the vertical surfaces of the anode plate electrode 6a and the cathode plate electrode 7a are at a constant distance. Spaced apart (see FIG. 3).

Power supply pins 6c and 7c are formed on the outer side of the support plates 6b and 7b, and the power supply pins 6c and 7c are formed on the anode support plate 6b and the cathode support plate 7b, respectively. ) And the negative electrode pin 7c are integrally coupled to each other through a machining method such as welding.

The positive electrode support plate 6b and the negative electrode support plate 7b are provided with decomposable fastening means on the support plate insertion recesses 4e formed on the coupling flanges 4b, and are fitted to the fastening or insertion recesses 4e and detached when disassembled. It is made easy, and it is comprised so that it may be convenient at the time of periodical inspection of an electrode part. Of course, the method and means for fastening can be any number of variations.

The engaging flange 4b is fastened to the abovementioned body flange 4a by means of fastening means such as bolts 5a and nuts 5b. Sealing means such as a gasket is provided on the engaging surface of the body flange 4a and the engaging flange 4b.

Cleaning unit

The cleaning unit passes through the insertion hole 4c formed in the coupling flange 4b on one side of the body 1 mentioned above, and the cleaning tube 10a and the cleaning tube are inserted into the insertion groove 4d of the other coupling flange 4b. It consists of a plurality of nozzles 10b mounted on the upward surface of 10a.

The insertion hole 4c through which the cleaning tube 10a penetrates is provided to have a sealing ring, and is configured to provide a sealing function. The cleaning tube 10a penetrating the one coupling flange 4b is inserted into the other coupling flange 4b. Inserted and fixed in 4d).

Pressurization

As shown in FIG. 1, the pressurizing unit includes a flexible connecting tube 8 coupled to one side of the washing tube 10a and a pressing means coupled to the flexible connecting tube 8.

The connecting portion of the washing tube (10a) and the pressurizing means is composed of a flexible connecting tube (8) to cope with the change in volume and vibration of the pressurizing means due to the contraction and expansion of the pressurized fluid.

The pressurizing means may be composed of a compressor (9) or a pump (13, see Fig. 5) according to the pressurized fluid, except that the pressurized fluid is a liquid and the compressor (9) In this case, the pressurized fluid is gas.

Hereinafter, the general operation of the electrolysis apparatus according to the present invention will be described with reference to FIGS. 1 and 3 to 6.

General operation of the electrolysis device according to the present invention

As shown in FIG. 1, the dilute brine is supplied from the dilute saline supply pipe 3 to pass through between the positive electrode plate electrode 6a and the negative electrode plate electrode 7a (see FIG. 3). The sodium in the brine is electrolyzed using the direct current added to 6c) and the negative electrode pin 7c.

As mentioned in the detailed description of the design, the dilute saline supplied during the series of sodium electrolysis processes, although there are differences in their concentrations, are always present because calcium (Ca ²⁺ ) and magnesium (Mg ²⁺ ) ions are present. During electrolysis, cationic materials such as calcium and magnesium ions are deposited on the surface of the cathode.

At this time, the operation of the electrolysis device is stopped and the compressor 9 is operated to inject the compressed air through the nozzle 10b installed upward in the washing tube 10a.

When the compressed air is injected as described above, as shown in FIG. 4, the vorticity is formed in the electrolysis device because of the compressed air that is injected. As a result, the residual sodium hypochlorite solution in the electrolysis device also rotates. do.

Accordingly, the rotating sodium hypochlorite solution causes the cationic substances such as calcium and magnesium ions deposited on the surface of the cathode plate electrode 7a to be removed from the cathode plate electrode 7a.

For reference, bubbles generated as compressed air is injected from the nozzle 10b of the washing tube 10a are suspended in the upper portion of the electrolysis device and discharged through the sodium hypochlorite discharge pipe 2 (see FIG. 4).

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

The right of the present invention should not be construed as limited by the following examples, and may be modified by those skilled in the art to which the present invention belongs without departing from the claims of utility model registration. It will be obvious.

EXAMPLE

As described above, this embodiment is an example of removing calcium and sodium ions deposited on the negative electrode plate flat electrode 7a during electrolysis using an electrolysis device including a body portion, an electrode portion, a washing portion, and a pressing portion. Explain.

In addition, the present embodiment shows an example of using a sodium hypochlorite solution remaining in the electrolysis device for the pressurized fluid pressurized in the pressurizing unit.

Accordingly, the pressurization part may pressurize the liquid and consist of a chemical resistant pump 13 that is also resistant to sodium hypochlorite, thereby constructing a pipe flow system including the pump 13 and a control valve. .

Hereinafter, the present embodiment will be described in more detail with reference to FIGS. 5 and 6.

Dilute brine is supplied from the dilute brine supply pipe 3 to pass between the positive electrode plate electrode 6a and the negative electrode plate electrode 7a (see FIG. 3), and the positive pin 6c and the negative electrode pin 7c. The sodium in brine is electrolyzed using the direct current added to.

Dilute brine supplied during sodium electrolysis has a difference in concentration, but calcium (Ca ²⁺ ) and magnesium (Mg ²⁺ ) ions are always present. Cationic materials such as magnesium ions are deposited.

At this time, the operation of the electrolysis device is stopped, the first valve 15 shown in FIG. 5 is closed, and the second valve 16 is opened. Subsequently, when the pump 13 is operated, the sodium hypochlorite solution remaining in the electrolysis device is sucked into the pump 13 through the circulation pipe 14 by the suction force of the pump 13, and the sucked sodium hypochlorite The solution is supplied to the washing tube 10a.

Sodium hypochlorite supplied to the washing tube (10a) by the operation as described above is injected through the nozzle (10b) installed in the washing tube (10a) upwards.

When the sodium hypochlorite solution is pressurized by the pump 13 and sprayed, as shown in FIG. 6, a vorticity is formed in the electrolysis device due to the sprayed sodium hypochlorite solution, and thus the inside of the electrolysis device Sodium hypochlorite solution is rotated.

Accordingly, the rotating sodium hypochlorite solution hits the surface of the negative electrode plate electrode 7a, and a cationic material such as calcium and magnesium ions deposited on the negative electrode plate electrode 7a by such a hit of sodium hypochlorite. The negative electrode plate-like electrode 7a is removed from the pump, and as the suction and discharge actions of the pump 13 are repeated, the above-described series of washing operations are also repeated.

When the cationic material deposited on the cathode plate-shaped electrode 7a is removed by the above washing operation, the pump 13 is stopped, the second valve 16 is closed, and the first valve 15 is opened. The cleaning operation of the cathode plate electrode 7a is completed.

The cleaning operation for removing the cation deposited on the cathode plate electrode 7a according to the present invention is performed when the operation of the electrolysis device is at rest and cannot be performed during the electrolysis process.

In general, the electrolysis device is set to operate at a low level and stop at a high level of sodium hypochlorite reservoir (not shown).

Therefore, when the cathode plate-shaped electrode 7a of the electrolytic apparatus is required to be cleaned, the electrolytic apparatus is at rest or the pump 13 must be electrically operated after stopping the operation of the electrolytic apparatus.

In addition, the first valve 15 and the second valve 16 installed in the sodium hypochlorite discharge pipe 2 and the circulation pipe 14 according to the operation of the pump 13 can be controlled by a control panel (not shown), and the pump It will be easy for a person skilled in the art to control and implement the control panel 13 so that the 13 and the first valve 15 and the second valve 16 interlock with each other.

As mentioned above, according to the present invention, by easily removing the cation deposited on the cathode portion in the electrolysis device, it is expected that the electrolyte solution can be sufficiently supplied, thereby producing a high concentration of sodium hypochlorite.

Claims (6)

An electrolyzer body part having an electrode embedded therein, a dilute saline supply pipe connected to the body part to supply dilute saline solution into the body part, and a connection to the body part to discharge sodium hypochlorite generated in the body part. In the electrolysis device comprising a discharge pipe, An electrode part inserted into the body part 1 and coupled to a flange 4a at both ends of the body part 1 to supply power to the body part 1; Penetrating through the insertion hole (4c) formed in the flange of one side of the body portion 1, is inserted into and supported in the insertion groove (4d) formed in the flange of the other side of the body portion 1 to clean the electrode portion in the body portion (1) A washing unit including a washing tube 10a for the washing machine; It is coupled to a connection pipe 8 coupled to one end of the washing tube 10a passing through the insertion hole 4c formed at one flange of the body portion 1, and pressurized to supply a pressurized fluid to the washing tube 10a. To call; Electrolysis device comprising a. The method of claim 1, The body portion (1) is tubular, electrolysis device, characterized in that consisting of a transparent material that can identify the electrode portion in the body portion. The method of claim 1, The electrode unit is characterized in that the electrolytic device is composed of a positive electrode and a negative electrode coupled to the flanges on both sides of the body (1). The method according to claim 1 or 3, Each of the anode portion and the cathode portion of the electrode portion, A plurality of plate electrodes (6a, 7a) embedded in the body portion; Support plates 6b and 7b in which the plate-shaped electrode is coupled to and supported on one surface thereof; An electrolysis device, comprising: a power supply pin (6c, 7c) coupled to the other surface of the support plates (6b, 7b) to receive power. The method of claim 1, Electrolytic apparatus, characterized in that the cleaning pipe (10a) of the washing unit is configured with a plurality of nozzles (10b) for ejecting the pressurized fluid to the electrode side. The method of claim 1, The pressurizing unit is characterized in that the compressor (9) to the pump (13) according to the pressurized fluid supplied to the washing tube (10a).