KR100950415B1 - Electrolysis apparatus of seawater or fresh water - Google Patents

Abstract

PURPOSE: An electrolytic device of freshwater or seawater is provided to minimize attachment of a foreign material on an electrode in an electrolysis tank and improve electrolytic efficiency. CONSTITUTION: An electrolytic device comprises: an influx unit(12), an exhausting unit(14), an electrolysis tank through which electrolyzed water passes; and an electrode which is placed inside the electrolysis tank in a flow direction of the electrolyzed water and comprises plural anode plates(20) and cathode plates(30). The cathode plate corresponding to the anode plate is placed in plural.

Description

Electrolysis apparatus of freshwater or seawater {Electrolysis apparatus of seawater or fresh water}

The present invention relates to an electrolysis device for freshwater or seawater which minimizes the attachment of foreign substances to the electrolysis tank electrodes of the electrolytic facility during electrolysis of fresh water or seawater, which enables stable electrolysis tank operation and greatly improves electrolytic efficiency. .

In general, when shellfish or microorganisms live in a cooling water treatment device or a ballast water treatment device related to the safe operation of a vessel, the heat exchange efficiency is reduced and the supply of constant flow is difficult Because of the enormous difficulty that arises, techniques have been developed to address these organisms in a variety of ways.

At the request of the United Nations Conference on Environment and Development in 1992, the International Maritime Organization, in order to prevent the spread of non-indigenous organisms by ballast water, and to prevent the destruction and pollution of ecosystems by ballast water, can provide And two methods of physically and chemically sterilizing or disinfecting ballast water are proposed.

Compared to the various treatment apparatuses used for the above-mentioned purposes-filtering method, ultraviolet disinfection method, heating method, chemical treatment method and electrical treatment method-the electrolytic treatment device is most effective in terms of economics, stability and treatment efficiency. can do.

This electrolysis facility administers a certain amount of sodium chloride (NaCl) in fresh water, and produces sodium hypochlorite (NaOCl) from sodium chloride, which is contained in seawater in about 3% of seawater, to produce fresh water by strong bactericidal power of sodium hypochlorite. It is used to prevent the attachment and reproduction of marine life.

Conventional electrolysis desalination or seawater treatment apparatus is a Korean Patent Application No. 10-2002-36086 (2002.06.26), "Effluent disinfection facility of sewage treatment plant, Korean Patent Application No. 10-2005-0085605 (2005.09. 14) "Electrolytic disinfection apparatus for ballast water for ships" and "Valve ballast water sterilization apparatus using a bipolar electrolysis system" of Korean Patent Application No. 10-2006-0113865 (2006.10.14).

However, problems common to most freshwater or seawater electrolysis devices are described in Korean Patent Application No. 10-2005-0073408 (2005.08.10), "Apparatus for Monitoring Electrode Attachments of Seawater Electrolytic Facilities" and Domestic Application No. 10. Magnesium hydroxide (Mg (OH) 2) or potassium hydroxide as electrolysis by-products in electrodes or electrolysis tanks in electrolytic installations, as mentioned in "2006-0126694," Method and Apparatus for Electrolyzing Seawater, Freshwater and Wastewater Using Precision Switching Rectifiers ". A large amount of (Ca (OH) 2) causes many problems such as an increase in electrolytic voltage, electrode damage, and a decrease in electrolytic efficiency.

Therefore, there is a demand for a method of reducing the deposit of foreign substances and improving the electrolytic efficiency when operating the electrolysis device of fresh or sea water.

The present invention has been made to solve this problem, the electrode consisting of a positive electrode plate and a negative electrode plate in the flow direction of the flow of electrolytic water passing through the electrolysis tank of the fresh water or seawater electrolysis device, but the negative electrode corresponding to the positive electrode plate The plate is arranged in at least a plurality, so that one negative electrode plate continues to operate, and the other negative electrode plate alternately removes the attached foreign matter. It is to provide an electrolysis device of fresh or sea water.

In addition, the positive electrode plate is arranged in a straight line in the flow direction of the electrolyzed water passing through the electrolysis tank, the plurality of negative electrode plates arranged in correspondence with the positive electrode plate is arranged so that the lengthwise end portions are spaced narrow or wide with each other. It is to provide an electrolysis device of fresh water or seawater to change the flow and flow rate of the electrolyzed water to minimize the adhesion of foreign matter to the electrolysis tank electrode.

The present invention is an electrolysis device of fresh water or sea water, the inlet is provided on one side and the discharge part is provided on the other side to pass the electrolytic water made of fresh water or seawater, and the electrolytic water flow in the electrolysis tank in the direction of flow An electrode composed of a plurality of positive electrode plates and negative electrode plates is arranged to supply current through the rectifier, respectively, but the positive electrode plate and the corresponding negative electrode plate are arranged in at least a plurality so that one negative electrode plate continues operation and another The remaining negative electrode plate is characterized by an electrolysis device of fresh or sea water so that the action of dropping off the attached foreign matter is alternately performed.

As described in detail above, the present invention can operate the electrolysis device more stably by adjusting the structure and characteristics of the negative electrode plate in the facility using the electrolysis of fresh water or sea water, foreign matter attached to the negative electrode plate generated during long-term operation It is possible to prevent the voltage rise and the operation interruption caused by this, and to suppress the decrease in electrolytic efficiency.

The present invention is to produce a highly oxidizing substances such as sodium hypochlorite (NaOCl), hypochlorous acid (HOCl) and ozone (O ₃ ) by the electrolysis device of fresh or sea water, the operation voltage of the electrolysis tank is low, the electrode By minimizing foreign matter adhesion to the surface, it is possible to reduce the time and cost required to remove foreign matter from the surface of the negative electrode plate, and to enable stable electrolysis tank operation for a long time and thereby obtain economic benefits.

In order to achieve the above object, the present invention arranges a positive electrode plate and a negative electrode plate in an electrolysis tank of a freshwater or seawater electrolysis device, but the negative electrode plate and the corresponding negative electrode plate are disposed in at least a plurality, and any one negative electrode plate is operated. Another negative electrode plate is characterized in that the long-term operation is possible in such a configuration that the action to eliminate the attached foreign matter alternately.

In addition, the present invention, the positive electrode plate is arranged in a straight line in the electrolysis tank and the plurality of negative electrode plates arranged in correspondence with the positive electrode plate in the configuration in which one end in the longitudinal direction is arranged to be narrow or wide to change the flow and flow rate of the electrolytic water It is characterized in that to minimize the adhesion of foreign matter to the electrolytic bath electrode.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

The present invention is an electrolysis device of fresh water or sea water, the inlet 12 is provided on one side and the discharge portion 14 is provided on the other side of the electrolysis tank 10 to pass the electrolytic water made of fresh or sea water and In order to supply current through a rectifier (not shown) by disposing an electrode including a plurality of positive electrode plates 20 and negative electrode plates 30 in the electrolytic water flow direction in the electrolysis tank 10, The positive electrode plate 20 and the corresponding negative electrode plate 30 are arranged in at least a plurality, so that any one of the negative electrode plates 30 continues to operate and the other negative electrode plate 30 is attached. It is characterized by an electrolysis device of fresh or sea water which is configured to alternately remove the debris.

In the electrolytic apparatus, the positive electrode plate 20 uses a form in which a platinum group compound is coated on titanium, and the negative electrode plate 30 uses titanium, nickel, sus and carbon steel.

The positive electrode plate 20 uses an insoluble (DSA) electrode coated with a platinum group compound for wastewater treatment which is generally used, and the negative electrode plate 30 is preferably a metal component capable of supplying electricity, and the negative electrode plate 30 The metal component of titanium, nickel, sus (SUS304), SUS316, SUS316L and carbon steel.

The positive electrode plate 20 is provided with a plate-shaped electrode plate (A) or a mesh electrode plate (B) made of a porous mesh, the plurality of negative electrode plates (30) are provided with a mesh electrode plate (B) alternately electric It is preferable to be capable of decomposing, and the most preferable component of the negative electrode plate 30 is preferably a mesh electrode plate of titanium and nickel.

The negative electrode plate 30 of the electrolysis device is preferably 1.5 to 4 times the active area compared to the active area of the positive electrode plate 20, the negative electrode plate 30 is installed to increase the active area of the negative electrode plate 30 It is preferable to the electrolysis tank 10 provided to be arranged to be two to four times the number of the positive electrode plate 20, taking into account that affects the electrolytic efficiency when the number of the negative electrode plate 30 increases indefinitely will be.

In addition, the positive electrode plate 20 and the plurality of negative electrode plates 30 disposed in the flow progressing direction of the electrolytic water passing through the electrolysis tank 10 are arranged in a straight line with each other in a plane as shown in FIG. It is arrange | positioned in the form of the parallel provided with this equal space | interval 30a.

4 and 5 show another arrangement of the negative electrode plate, in which the positive electrode plate 20 is disposed in a straight line in a plane in the flow direction of the electrolyzed water passing through the electrolysis tank 10. The plurality of negative electrode plates 30 corresponding to the plates 20 are provided with variable intervals 30b in which one end in the longitudinal direction thereof becomes narrower or wider, so that the flow and flow rate of the electrolyzed water can be changed. It is preferable to minimize the adhesion of foreign matter to the negative electrode plate 30.

In the electrolysis tank 10, the mutual spacing of the negative electrode plate 30, which is provided in plurality or more, is 0 mm to 7 mm wide in the treated water inlet 12 of the electrolysis tank 10 and discharges electrolytic water. On the side 14, the difference in the flow rate can be varied by varying the width from 7mm to 0mm narrowly, but the interval of 0mm indicates that one end of the negative electrode plate 30 is in contact with each other. Most preferably, the inlet 12 of the decomposition tank 10 has a smaller spacing between the negative electrode plates 30 than the electrolytic water outlet 14. The electrolytic bath 10 is most preferably in terms of the electrolytic efficiency of the electrode plate 20 and the negative electrode plate 30 is provided with a narrow electrode distance from 3mm to 15mm wide.

Referring to the accompanying drawings, the operation process according to the electrolysis device of fresh water or seawater of the present invention as described above are as follows.

The present invention generates sodium hypochlorite, hypochlorous acid, ozone and the like using seawater based on the fact that when the concentration of the strong oxidizer in the electrolyzed water is 0.3 ppm or more, organisms and pathogens in fresh or seawater are removed or growth is inhibited. It is an electrolysis device for making.

In the electrolytic apparatus of the present invention, the positive electrode plate 20 and the negative electrode plate 30 corresponding to the positive electrode plate 20 in the electrolytic water flow direction in the electrolysis tank 10 are disposed in at least a plurality of positive electrode plates 20 and the negative electrode. Means for applying power to the plate 30 while passing the electrolytic water of fresh water or seawater from the inlet 12 of the electrolysis tank 10 to the outlet 14 by driving a circulation pump (not shown). The electrolysis is to be made in the electrolysis tank 10.

Sodium hypochlorite (NaOCl), hypochlorous acid (HOCl) and ozone (O ₃ ) in the process of electrolytic water electrolysis by the positive electrode plate 20 and the negative electrode plate 30 in the interior of the electrolysis tank 10 as described above To produce a strong oxidizing material, such as to sterilize the electrolytic water.

In this electrolysis process, various foreign substances such as inorganic ions, light metal ions, and suspended solids contained in the electrolyzed water are attached to the negative electrode plate 30 corresponding to the electrode having a potential opposite to the charge, thereby increasing the electrolytic voltage, damaging the electrode, and reducing the electrolytic efficiency. Problems such as this occur.

In this case, since the positive electrode plate 20 and the negative electrode plate 30 corresponding to each other are arranged in at least a plurality, the electrolytic water may be discharged by the positive electrode plate 20 and the negative electrode plate 30 inside the electrolysis tank 10. When foreign matter is attached to the negative electrode plate 30 which is electrolyzed in correspondence with the positive electrode plate 20 in the process of electrolysis, the operation of the negative electrode plate 30 to which such foreign matter is attached is stopped and at the same time Electrolysis is alternately performed by another negative electrode plate 30 to which foreign matters are not attached, while the negative electrode plate 30 in the stopped state does not undergo electrolysis, and thus, foreign matters attached to the negative electrode plate 30 do not carry out electrolysis. It is easily eliminated by this.

As described above, in the present invention, the positive electrode plate 20 and the negative electrode plate 30 corresponding to each other are arranged in at least a plurality, so that any negative electrode plate 30 continues to operate and another negative electrode plate 30 is attached to the foreign matter. It is possible to continue operation for a long time and improve the electrolytic efficiency.

On the other hand, as described above, the positive electrode plate 20 and the negative electrode plate 30 corresponding to the electrolytic bath 10 are arranged in at least a plurality, but as shown in FIGS. 4 to 5, the positive electrode plate 20 is in a straight line on a plane. In the case of using a plurality of negative electrode plate 30 which is arranged to correspond to the positive electrode plate 20 is provided with a variable interval (30b) in which one end in the longitudinal direction is narrow or wide each other in the electrolysis tank (10) As the flow and flow rate of the electrolyzed water are changed by the variable interval 30b of the negative electrode plate 30 passing through the inside, foreign matter is minimized to be attached to the negative electrode plate 30.

In the electrolysis device of the present invention to achieve the above-described electrolysis action, the electrolytic voltage confirmed by various comparative examples is as follows.

Example 1

The electrolysis tank used 6 cm wide, 6 cm high and 6 cm high internal spaces. Using a pair of electrodes consisting of two positive electrode plates and two negative electrode plates, a standard solution with sodium chloride concentration of 3% and magnesium concentration of 0.13% was made. The electrolysis reaction was carried out while supplying 4.32 A of current under the condition of 8 L / min, and the change of the electrolytic voltage was measured to confirm whether the negative electrode plate adhered.

[Example 2]

Under the condition of Example 1, two negative electrode plates were installed and the flow rate was adjusted to 6 L / min to perform an electrolysis reaction.

Example 3

Using the electrode used in Example 2, the electrolytic reaction was carried out at 0.26%, which doubled the magnesium concentration, and the experiment was carried out to forcibly attach magnesium to the negative electrode plate.

[Examples 4 to 5]

Using the same electrolytic bath as in Example 2 above, but using the standard solution of Example 1, the negative electrode plate was arranged as shown in FIG. 4, and the negative electrode plate was arranged as shown in FIG. Example 5 was used as the constitution, and the electrolysis reaction was carried out using an electrolysis tank at a flow rate of 6 L / min.

[Examples 6 to 8]

Using the conditions of Example 5 above, the flow rate was 8 L / min as Example 6, the flow rate was 10 L / min as Example 7, and the flow rate was 12 L / min. Using the above conditions as Example 8, an electrolysis experiment was performed to measure changes in electrolytic voltage.

The experimental results according to Examples 1 to 8 are summarized in Table 1. As shown in Table 1, the electrolytic apparatus was operated with a plurality of negative electrode plates corresponding to the positive electrode plate and arranged to change the flow and flow rate of the electrolyzed water of the electrolyzed water. It was found that there is an economic advantage to minimize the voltage rise to reduce the time and cost required to remove foreign substances.

Table 1 Example

Example Electrolytic Voltage (V) One 4.04 ~ 4.10 2 3.71 ~ 3.82 3 3.84 to 3.91 4 3.71-3.81 5 3.71 ~ 3.84 6 3.80 ~ 3.86 7 3.75 ~ 3.80 8 3.72-3.80

In the above, the present invention has been described with reference to the above embodiment, but various modifications are possible within the technical scope of the present invention.

1 is a schematic view showing the arrangement of the electrode according to the electrolysis device of the present invention.

2 is a plan view of an electrolysis apparatus according to the constitution of the present invention.

Figure 3 is a perspective view showing the electrode arrangement of the electrolytic apparatus according to FIG.

4 and 5 is a schematic view showing another arrangement of the electrode by the electrolysis device of the present invention.

6 and 7 are plan views of the electrolysis apparatus according to FIGS. 4 and 5.

8 and 9 are perspective views showing the electrode arrangement of the electrolytic apparatus according to FIGS. 6 and 7.

10 is a plan view of an electrolysis device showing another embodiment of the present invention.

FIG. 11 is a trial of a state in which a positive electrode plate is arranged as a mesh electrode plate in the configuration of FIG. 3; FIG.

DESCRIPTION OF THE REFERENCE NUMERALS

10: electrolysis tank 12: inlet

14 discharge portion 20 positive electrode plate

30: negative electrode plate 30a: equal interval

30b: variable interval A: plate-shaped electrode plate

B: mesh electrode plate

Claims (7)

In the electrolysis device of fresh water or sea water, An electrolysis tank 10 provided with an inlet 12 at one side and an outlet 14 at the other side to allow electrolyzed water of fresh water or sea water to pass therethrough; An electrode composed of a plurality of positive electrode plates 20 and negative electrode plates 30 is disposed in the electrolytic water flow direction in the electrolysis tank 10 to supply current through the rectifier, respectively. The positive electrode plate 20 and the negative electrode plate 30 corresponding to each other are arranged in at least a plurality of one of the plurality of negative electrode plates 30 of the negative electrode plate 30 continues the operation and the other negative electrode plate 30 To take off the attached foreign matters alternately, The positive electrode plate 20 is disposed in a straight line in the electrolysis tank 10, and the plurality of negative electrode plates 30 corresponding to the positive electrode plate 20 are narrow in width in one longitudinal direction. Freshwater or seawater electrolysis device, characterized in that it is provided with a variable interval (30b) to extend or widen to change the flow and flow rate of the electrolytic water. delete The method of claim 1, The negative electrode plate 30 is a freshwater or seawater electrolysis device, characterized in that provided with a mesh electrode plate (B) made of a porous mesh. delete delete The method of claim 1, The mutual spacing of the negative electrode plate 30 is from 0mm to 7mm wide in the treated water inlet 12 of the electrolysis tank 10 and from 7mm wide to 0mm narrow in the electrolytic water outlet 14 side Freshwater or seawater electrolysis device, characterized in that arranged with a difference. The method of claim 1, The electrolysis tank 10 is an electrolysis device of fresh or sea water, characterized in that the electrode gap between the positive electrode plate 20 and the negative electrode plate 30 is provided in a narrow 3mm to 15mm wide.

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