Ship balance water treatment system

Abstract

One aspect of the present invention provides a ship equilibrium water treatment system installed inside a ship, the system including: a first feed section including a first tank in which a solid raw material is stored, a water supply device that provides a first water stream to the first tank, and a first raw material supply device that mixes the solid raw material and the first water stream to produce a raw aqueous solution; a first electrolysis section including a first anode chamber that reacts the raw aqueous solution to obtain a first anode product, a first cathode chamber that reacts water and cations provided from the first anode chamber to obtain a first cathode product, and a first diaphragm that separates the first anode chamber and the first cathode chamber; a reaction section that reacts the first anode product and the first cathode product to obtain a treatment agent; and an injection section that provides the treatment agent to the equilibrium water.

Description

[Technical field]

[0001] The present invention relates to a ship balance water treatment system, and more particularly, to a ship balance water treatment system that is installed inside a ship and can smoothly treat ship balance water not only in ships that are at anchor but also in ships that are in operation. [Background technology]

[0002] Sodium hypochlorite (NaOCl) is used in a variety of fields, including water supply and sewerage, wastewater treatment, seawater electrolysis and ship balance water treatment, and agricultural and food sterilization and disinfection.

[0003] Recently, on-site sodium hypochlorite manufacturing equipment suitable for small-scale water purification plants has been developed, taking into consideration the aspects of stability, ease of maintenance, and economic efficiency. Such on-site sodium hypochlorite manufacturing equipment can produce sodium hypochlorite at a low concentration of 0.4 to 1.0% by electrolyzing salt water, but such sodium hypochlorite manufacturing equipment has limitations in its application to large-capacity facilities due to its difficulty in removing by-products, low salt conversion rate and low power efficiency, and low sodium hypochlorite concentration.

[0004] Korean Patent Registration No. 10-1226640 and Korean Patent Publication No. 10-2012-0002074 disclose an apparatus and / or method for producing high-concentration sodium hypochlorite using a diaphragm method, but because they do not have a means for purifying the brine (NaCl aqueous solution) supplied to the anode chamber, ionic impurities such as calcium and magnesium remaining in the brine contaminate the ion exchange membrane of the electrolysis tank, reducing power efficiency and shortening the life of the ion exchange membrane. In addition, it is difficult to adjust the material balance of the brine supplied to the anode chamber using only a conductivity sensor and a temperature sensor.

[0005] In addition, in such diaphragm-type electrolysis cells, the amount of salt consumed is greater than the amount of water consumed during the electrochemical reaction between salt (NaCl) and water, so the concentration of the saturated salt water initially supplied to the anode chamber gradually decreases. To counter this decrease in concentration, saturated salt water can be injected to maintain the concentration within a required range, but as the volume of the anode water increases, an overflow phenomenon can occur. The overflowed anode water is treated and regenerated through a separate process, but this process requires increased equipment, costs, and scale, and also creates problems with the use of chemicals such as hydrochloric acid (HCl), sodium hydroxide (NaOH), and residual chlorine neutralizers, which increases the human and material burden.

[0006] Korean Patent No. 10-2074331 discloses an apparatus for producing high-concentration sodium hypochlorite on-site using seawater or artificial salt water, but when such an apparatus is directly installed on a facility or ship, the cost borne by the user of the facility or ship may increase. In particular, when producing a treatment agent by supplying seawater as a raw material to an electrolysis tank installed inside a ship, impurities in the seawater may cause a large amount of scale to form in the equipment, including the electrolysis tank, making it difficult to easily control the concentration of the treatment agent, and the decomposition of the produced disinfectant proceeds quickly, making it difficult to maintain a constant concentration.

[0007] In addition, since the concentration and quality of seawater varies depending on the sea area where a ship sails, there are limitations to producing a treatment agent of uniform quality. The concentration of sodium hypochlorite solution is restricted by the nationality of the ship as well as the laws and international treaties of the country where the ship is anchored or sailing, so it is difficult to eliminate such restrictions by producing sodium hypochlorite of various concentrations using conventional on-site equipment. In addition, there is a problem that it is not possible to produce a treatment agent in freshwater sea areas because the supply and demand of raw materials is fundamentally impossible.

[0008] Korean Patent No. 10-2025559 discloses a technology for mixing seawater, from which impurities have been filtered out, with an electrolyte and using it as a raw material for producing a treatment agent, but it requires expensive auxiliary equipment such as a filter to remove impurities from seawater, which increases the overall size of the treatment agent production equipment and makes maintenance difficult. In addition, the concentration of the treatment agent produced using seawater as a raw material is limited to about 0.2% by weight or less, and such a low-concentration treatment agent is more likely to be arbitrarily altered or its concentration reduced by various components in seawater compared to high-concentration treatment agents, making it difficult to store it stably for a long period of time. Furthermore, if hypochlorous acid (HOCl) and sodium hydroxide (NaOH) are produced in the anode chamber and cathode chamber of the electrolysis cell, respectively, and these are used independently to treat the ship's balance water and exhaust gas, respectively, it is difficult to control and store the production amount of each required substance, and in particular, the produced HOCl has a low pH, so it is difficult to store chlorine gas (Cl), a highly corrosive and toxic substance. 2 ) which can have a negative impact on the surrounding environment and facilities in general. Summary of the Invention [Problem to be solved by the invention]

[0009] The present invention has been made to solve the problems of the prior art as described above, and an object of the present invention is to provide a ship's balance water treatment system that can be installed inside a ship to smoothly treat ship's balance water not only in a ship at anchor but also in a ship in operation, can improve maintainability, economy, efficiency, etc. by simplifying and miniaturizing the equipment as a whole, and can easily and smoothly deal with various variables and constraints such as the nationality of the ship as well as the laws of the country where the ship is at anchor or in operation and international treaties. [Means for solving the problem]

[0010] One aspect of the present invention provides a ship equilibrium water treatment system installed inside a ship, the system including: a first feed section including a first tank in which a solid raw material is stored, a water supply device that provides a first water stream to the first tank, and a first raw material supply device that mixes the solid raw material and the first water stream to produce a raw aqueous solution; a first electrolysis section including a first anode chamber that reacts the raw aqueous solution to obtain a first anode product, a first cathode chamber that reacts water and cations provided from the first anode chamber to obtain a first cathode product, and a first diaphragm that separates the first anode chamber and the first cathode chamber; a reaction section that reacts the first anode product and the first cathode product to obtain a treatment agent; and an injection section that provides the treatment agent to the equilibrium water.

[0011] In one embodiment, the water in the first cathode chamber may be at least a portion of the first water stream, which is a solvent of the raw aqueous solution provided to the first anode chamber, passing through the first diaphragm from the first anode chamber to be provided to the first cathode chamber.

[0012] In one embodiment, the first membrane may be a water-permeable porous membrane.

[0013] In one embodiment, the first anode chamber includes two or more anode plates protruding at a predetermined interval, the first cathode chamber includes two or more cathode plates protruding at a predetermined interval into a space between the anode plates, and the first diaphragm may be located in the space between the anode plates and the cathode plates.

[0014] In one embodiment, the water in the first cathode chamber may be at least a portion of a second water stream branched off from the first water stream and provided to the first cathode chamber.

[0015] In one embodiment, the first membrane may be a cation exchange membrane.

[0016] In an embodiment, the device may further include a storage section for storing the treatment agent between the reaction section and the injection section.

[0017] In an embodiment, the ship balance water treatment system may further include a heat exchanger that cools the first electrolyzer using the treatment agent stored in the storage unit.

[0018] In an embodiment, the concentration of the treating agent obtained in the reaction section may be 0.01 to 50% by weight.

[0019] In an embodiment, the first feed unit may further include a raw aqueous solution treatment device for removing impurities contained in the generated raw aqueous solution.

[0020] In one embodiment, the ship equilibrium water treatment system may further include a metal hydroxide generator including: a second tank in which a metal salt containing two or more metal ions in a molecule is stored; a second feed unit including a second raw material supply device that mixes the metal salt and a third water stream branched from the first water stream to provide a metal salt aqueous solution; a second anode chamber that reacts the metal salt aqueous solution to obtain a second anode product, a second cathode chamber that reacts a fourth water stream branched from at least one of the first to third water streams or provided from the second anode chamber with metal ions provided from the second anode chamber to obtain a second cathode product, and a second diaphragm that separates the second anode chamber and the second cathode chamber; and a connection unit that combines the second cathode product and the first cathode product and provides them to the reaction unit.

[0021] In one embodiment, the second tank, piping supplying the metal salt aqueous solution to the second anode chamber, the second anode chamber, and piping supplying the second anode product to the second tank can form a closed loop.

[0022] In one embodiment, the closed loop may include an exhaust port for venting gases entrained in materials circulating along the closed loop.

[0023] In one embodiment, the metal salt can have a structure represented by the following formula. <Formula> M x A y

[0024] In the above formula, M is a monovalent or divalent metal ion, x is one of integers of 2 or more, A is an anionic substance capable of binding to the metal ion, and y is one of integers satisfying the above formula.

[0025] In one embodiment, the second diaphragm can be a water-permeable porous membrane.

[0026] In one embodiment, the second diaphragm can be a cation exchange membrane.

[0027] In one embodiment, the first and second electrolysis units can be connected in parallel with each other.

[0028] In one embodiment, the ship's ballast water treatment system can further include a hydrogen gas treatment unit.

Advantages of the Invention

[0029] According to one aspect of the present invention, a ship equilibrium water treatment system is installed inside a ship and includes a first feed unit including a first tank storing a solid raw material, a water supply device providing a first water stream to the first tank, and a first raw material supply device mixing the solid raw material and the first water stream to generate a raw aqueous solution; a first electrolysis unit including a first anode chamber reacting the raw aqueous solution to obtain a first anode product, a first cathode chamber reacting water and cations provided from the first anode chamber to obtain a first cathode product, and a first diaphragm separating the first anode chamber and the first cathode chamber; a reaction unit reacting the first anode product and the first cathode product to obtain a treatment agent; and an injection unit providing the treatment agent to the equilibrium water. This allows ship equilibrium water to be smoothly treated not only in a ship at anchor but also in a ship in operation, and the equipment can be simplified and compact overall to improve maintainability, economy, efficiency, and the like, and can easily and smoothly accommodate various variables and constraints such as the nationality of the ship as well as the laws of the country where the ship is at anchor or in operation and international treaties.

[0030] It should be understood that the effects of the present invention are not limited to the effects described above, but include all effects that can be inferred from the configuration of the invention described in the detailed description of the present invention or the claims. [Brief description of the drawings]

[0031] [Figure 1] 1 illustrates a vessel balance water treatment system according to one embodiment of the present invention. [Diagram 2] 2 shows a first electrolysis unit according to one embodiment of the present invention. [Diagram 3] 4 shows a ship balance water treatment system according to another embodiment of the present invention. [Figure 4] 4 shows a ship balance water treatment system according to another embodiment of the present invention. [Diagram 5] 4 shows a ship balance water treatment system according to another embodiment of the present invention. [Figure 6] 4 shows a ship balance water treatment system according to another embodiment of the present invention. [Figure 7]Shows the first and second electrolysis units according to an embodiment of the present invention.

Mode for Carrying Out the Invention

[0032] Hereinafter, the present invention will be described with reference to the accompanying drawings. However, the present invention can be embodied in various different forms and is not limited to the embodiments described herein. And in order to clearly explain the present invention in the drawings, parts not related to the description are omitted, and similar reference numerals are given to similar parts throughout the specification.

[0033] Throughout the specification, when it is stated that a part is "connected" to another part, this includes not only the case where it is "directly connected", but also the case where it is "indirectly connected" with other members interposed therebetween. Also, when it is stated that a part "includes" some component, this means that other components can be further provided without excluding other components unless otherwise stated to the contrary.

[0034] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0035] FIG. 1 shows a ship's ballast water treatment system according to an embodiment of the present invention.

[0036] Referring to FIG. 1, a ship equilibrium water treatment system according to one aspect of the present invention is a ship equilibrium water treatment system installed inside a ship, and includes a first feed unit 110 including a first tank 112 storing a solid raw material, a water supply device 111 providing a first water stream to the first tank 112, and a first raw material supply device 113 mixing the solid raw material and the first water stream to generate a raw aqueous solution; a first electrolysis unit 210 including a first anode chamber 211 reacting the raw aqueous solution to obtain a first anode product, a first cathode chamber 212 reacting water and cations provided from the first anode chamber 211 to obtain a first cathode product, and a first diaphragm 213 separating the first anode chamber 211 and the first cathode chamber 212; a reaction unit 300 reacting the first anode product and the first cathode product to obtain a treatment agent; and an injection unit 400 providing the treatment agent to the equilibrium water.

[0037] Previously, a technology was proposed in which a treatment agent, for example, sodium hypochlorite, manufactured outside the ship is directly provided to the balance water, or stored in a tank installed inside the ship and provided to the balance water as needed. However, in the former case, it can only be applied when the ship is anchored at a specific location equipped with a treatment agent manufacturing and / or injection equipment, or when a separate ship or equipment is docked to provide the treatment agent to the ship in operation, and in the latter case, there is a problem that the balance water cannot be treated after the treatment agent stored in the ship in operation is depleted.

[0038] In addition, a technology has been proposed to use seawater, which has been filtered of impurities, as a raw material for producing a treatment agent by mixing it with an electrolyte, but this requires expensive auxiliary equipment such as a filter to remove impurities from seawater, and this auxiliary equipment increases the overall size of the treatment agent production equipment, making maintenance difficult. In addition, the concentration of the treatment agent produced using seawater as a raw material is limited to about 0.2% by weight or less, and since such a low-concentration treatment agent is more likely to deteriorate randomly than a high-concentration treatment agent, it is difficult to store it stably for a long period of time. In addition, when using such a low-concentration treatment agent, a filter must be used to increase the death rate of marine organisms, but the cost required for the filter is large among the entire equipment, which is disadvantageous in terms of economy. On the other hand, in order to produce a high-concentration treatment agent, a diaphragm-type electrolysis equipment is required, but seawater cannot be used as it is, and there is a problem that complicated equipment and excessive costs are required to pretreat seawater.

[0039] In contrast, the ship's equilibrium water treatment system is installed inside the ship, so it can smoothly treat equilibrium water not only in ships that are at anchor but also in ships that are in operation, and has the advantage of not requiring auxiliary equipment such as filters because it can treat equilibrium water by continuously manufacturing, producing, and storing a high-concentration treatment agent using solid raw materials stored inside the ship as needed.

[0040] The first feed section 110 may include a first tank 112 in which a solid raw material, for example, salt, is stored, a water supplying device 111 that provides a first water stream to the first tank 112, and a first raw material supplying device 113 that mixes the solid raw material and the first water stream to generate a raw material aqueous solution.

[0041] The first tank 112 can store a solid raw material, for example, salt, supplied from the outside, and the first raw material supply device 113 can mix the solid raw material with the first water stream, which is provided from the water supply device 111 and is made of tap water, purified water (pure or higher), and / or seawater from which impurities have been filtered out, to generate a raw material aqueous solution, preferably salt water, more preferably saturated salt water, having a preset concentration, and provide the raw material aqueous solution to the first anode chamber 211 of the first electrolysis unit 210.

[0042] The first water stream provided from the water supply device 111 may be tap water, purified water, and / or seawater from which impurities have been filtered out. The tap water, purified water, and / or seawater from which impurities have been filtered out may be treated (filtered, sterilized, etc.) in separate equipment located outside the ship, stored in a water tank (not shown) provided at the front end of the water supply device 111, and provided to the first tank 112 by the water supply device 111 as needed.

[0043] The water supply device 111 does not need to include any means for injecting seawater into the inside of the ship and filtering and purifying it, for example, expensive auxiliary equipment such as a filter, and it directly supplies pre-stored tap water, purified water, and / or seawater from which impurities have been filtered out to the first tank 112, so that the ship's balance water treatment system can be simplified and miniaturized as a whole, thereby improving maintainability, economy, efficiency, etc.

[0044] The first raw material supplying device 113 may mix the first water stream, which may be tap water, purified water, and / or seawater from which impurities have been filtered out, with the solid raw material stored in the first tank 112 in a preset ratio to produce the raw material aqueous solution.

[0045] The raw aqueous solution generated and provided by the first raw material supplying device 113 contains electrolytes and water, which are raw materials for the treating agent, but is treated by a raw aqueous solution treatment device (not shown) as necessary and is substantially free of impurities. This effectively prevents unwanted scale from being generated in the ship's balance water treatment system due to such impurities, and the concentration of the treating agent aqueous solution obtained through the first electrolysis unit 210 can be easily and precisely controlled by adjusting the amount of the raw aqueous solution or the applied current.

[0046] The first raw material supplying device 113 may include a raw material aqueous solution treatment device (not shown) that removes residual impurities such as calcium and magnesium contained in the raw material aqueous solution, for example, saturated salt water, generated in the first raw material supplying device 113, thereby preventing contamination of the first diaphragm 213 of the first electrolyzing part 210, thereby improving the efficiency of the electrolysis reaction and contributing to extending the durability and lifespan of the first diaphragm 213.

[0047] The raw aqueous solution treatment device may include a water tank of a preset specification, a heating unit having a heater, a pH control unit, and a water softener (not shown) having a chelating resin capable of adsorbing and removing impurities from the raw aqueous solution that has passed through the heating unit. The heating unit can appropriately maintain the temperature, pH, etc. of the raw aqueous solution that has not been refined, for example, saturated salt water, to improve the adsorption efficiency of the water softener. For example, the appropriate temperature of the saturated salt water may be 50 to 80°C, and the pH may be 9 or more, but is not limited thereto.

[0048] The first electrolysis unit 210 may include a first anode chamber 211 in which the raw aqueous solution is reacted to obtain a first anode product, a first cathode chamber 212 in which water and cations, preferably metal ions, provided from the first anode chamber 211 are reacted to obtain a first cathode product, and a first diaphragm 213 separating the first anode chamber 211 and the first cathode chamber 212.

[0049] The first anode chamber 211 may include an anode and may hold a first anode product including anode water and gaseous substances generated by an electrolysis reaction at the anode, and the first cathode chamber 212 may include a cathode and may hold a first cathode product including cathode water and gaseous substances generated by an electrolysis reaction at the cathode.

[0050] When the raw aqueous solution is salt water, preferably saturated salt water, when a preset voltage is applied to the first electrolysis unit 210, the following substances may be produced in the first anode chamber 211 and the first cathode chamber 212.

[0051] In the first anode chamber 211, saturated salt water having a preset concentration is electrolyzed to produce sodium ions (Na + ), chlorine gas (Cl 2 ) and chloride ion (Cl - ) can be produced in the first cathode chamber 212 by electrolyzing water to produce hydrogen gas (H 2 ) and hydroxide ion (OH - The sodium ions generated in the first anode chamber 211 can move to the first cathode chamber 212 through the first diaphragm 213, and react with the hydroxide ions previously generated in the first cathode chamber 212 to generate sodium hydroxide.

[0052] The sodium hydroxide produced in the first cathode chamber 212 may be used alone and / or together with the metal hydroxide produced in the second cathode chamber 222 of the metal hydroxide production section described below as a raw material for producing a treating agent and / or as a buffer for adjusting the pH of the produced treating agent to enhance storage safety.

[0053] FIG. 2 shows a first electrolysis unit 210 according to one embodiment of the present invention.

[0054] Referring to FIG. 2(a), the water in the first cathode chamber 212 may be at least a portion of the first water stream, which is a solvent of the raw aqueous solution provided to the first anode chamber 211, passing through the first diaphragm 213 from the first anode chamber 211 to be provided to the first cathode chamber 212.

[0055] In this case, in the feed section, the water supply device 111 provides the first water stream only to the first tank 112, and the raw aqueous solution generated by the first raw material supply device 113 is provided to the first anode chamber 211. Cations, preferably metal ions, required for generating metal hydroxide in the first cathode chamber 212 are provided to the first cathode chamber 212 by chemically and / or physically permeating the first diaphragm 213 from the first anode chamber 211, and hydroxide ions may be generated by an electrolysis reaction of water provided to the first cathode chamber 212 by chemically and / or physically permeating the first diaphragm 213 from the first anode chamber 211. As used herein, the term "chemical permeation" means that an ionic substance having a predetermined charge permeates a diaphragm through a chemical means such as an ion exchange reaction, and "physical permeation" means that a substance permeates a diaphragm by overcoming physical and structural factors of the diaphragm, such as the size of the pores provided in the diaphragm and the thickness of the diaphragm.

[0056] In this manner, substantially all of the cations and water, which are the raw materials required to produce a metal hydroxide in the first cathode chamber 212, may have migrated from the first anode chamber 211 to the first cathode chamber 212 through the first diaphragm 213.

[0057] Referring again to FIG. 1, the feed unit and the first electrolysis unit 210 are connected only by a piping for connecting the feed unit and the first anode chamber 211 and for providing a raw aqueous solution of a preset concentration to the first anode chamber 211, and other separate equipment such as a piping for providing water serving as a raw material for hydroxide ions from the water supply device 111 to the first cathode chamber 212 can be omitted. Therefore, the ship's balance water treatment system can be simplified and compact overall, thereby improving maintainability, economy, efficiency, etc.

[0058] The first membrane 213 may be a water-permeable porous membrane.

[0059] Generally, a water-permeable porous membrane made of a ceramic material such as asbestos can include a number of holes and / or pores that are paths through which water can permeate and move. However, since such a water-permeable porous membrane does not have an ion exchange ability that can selectively pass specific ions, anions such as chloride ions generated in the first anode chamber 211 move to the first cathode chamber 212 together with water and cations, and may act as a by-product that inhibits the electrolysis reaction in the first cathode chamber 212.

[0060] In addition, the permeation and movement of water through the holes and / or pores may occur not only in one direction but also in two directions. Accordingly, if the water and cations provided to the first cathode chamber 212 and the hydroxide ions generated in the first cathode chamber 212 flow back to the first anode chamber 211, the raw materials cannot be stably provided to the first cathode chamber 212, and therefore, there is a problem that metal hydroxides and processing agents, such as sodium hydroxide and sodium hypochlorite, cannot be smoothly produced.

[0061] Meanwhile, the soft cation exchange membrane made of a polymer film allows cations generated in the first anode chamber 211 to permeate and move to the first cathode chamber 212 through an ion exchange reaction with functional groups provided in the cation exchange membrane, and in some cases, water molecules can form hydrates with cations and permeate and move to the first cathode chamber 212 through the cation exchange membrane. However, since the size of the pores provided in the membrane is very small, in the nanometer (nm) range, a liquid substance, for example, water, cannot smoothly move from the first anode chamber 211 to the first cathode chamber 212, and separate equipment such as piping for providing a sufficient amount of water to the first cathode chamber 212 is required.

[0062] In contrast, the first diaphragm 213 is provided as a water-permeable porous membrane, and therefore can allow a sufficient amount of water to permeate from the first anode chamber 211 to the first cathode chamber 212 .

[0063] In addition, the surface of the water-permeable porous membrane and / or the surface of the pores provided therein can be chemically and / or physically treated to impart ion exchange ability to the water-permeable porous membrane. The water-permeable porous membrane having ion exchange ability can selectively permeate the cations generated in the first anode chamber 211 to the first cathode chamber 212 due to the inherent electrochemical properties of the membrane.

[0064] However, even when the first diaphragm 213 is a water-permeable porous membrane, water and cations provided to the first cathode chamber 212 and hydroxide ions generated in the first cathode chamber 212 may flow back to the first anode chamber 211 due to structural factors of the first electrolyzing unit 210, such as the relative positions of the first anode chamber 211 and the first cathode chamber 212 partitioned by the first diaphragm 213. As a result, raw materials may not be stably provided to the first cathode chamber 212, and metal hydroxides and treating agents, such as sodium hydroxide and sodium hypochlorite, may not be smoothly produced.

[0065] 2(b), the first anode chamber 211 may include two or more anode plates 211' protruding downward at a predetermined interval, the first cathode chamber 212 may include two or more cathode plates 212' protruding upward at a predetermined interval in a space between the anode plates 211', and the first diaphragm 213 may be located in the space between the anode plates 211' and the cathode plates 212'. Also, the first diaphragm 213 may partition the first anode chamber 211 and the first cathode chamber 212 to be located at the upper and lower parts of the first electrolyzing unit 210, respectively.

[0066] The anode plate 211' and the cathode plate 212' are located in the space between two adjacent cathode plates 212' and two adjacent anode plates 211', respectively, but the anode plate 211' and the cathode plate 212' may be spaced apart from each other at a preset interval and not in contact with each other. That is, the anode plate 211' and the cathode plate 212' may have a non-contact cross-type comb structure. The cross-type comb structure formed by the anode plate 211' and the cathode plate 212' may increase the area of ​​the electrodes where the electrolysis reaction is performed, thereby contributing to improving reaction efficiency and productivity.

[0067] The first diaphragm 213 is located in the space between the anode plate 211' and the cathode plate 212' to partition the first anode chamber 211 and the first cathode chamber 212 into the upper and lower portions of the first electrolyzing unit 210. In the first electrolyzing unit 210, material transfer is preferably from the first anode chamber 211 to the first cathode chamber 212, and a backflow phenomenon in which material transfers from the first cathode chamber 212 to the first anode chamber 211 must be appropriately suppressed.

[0068] The first diaphragm 213 partitions the first anode chamber 211 and the first cathode chamber 212 so that they are located at the upper and lower parts of the first electrolyzing unit 210, respectively, thereby physically forcing the direction of material movement in the first electrolyzing unit 210 from the first anode chamber 211 to the first cathode chamber 212. Specifically, when the raw aqueous solution is salt water, sodium ions (Na + ), chlorine gas (Cl 2 ) and chloride ion (Cl - ) can be produced in the first cathode chamber 212 by electrolysis of water, and hydrogen gas (H 2 ) and hydroxide ion (OH - ), sodium hydroxide may be produced by reaction between the sodium ions provided from the first anode chamber 211 and the hydroxide ions.

[0069] In order to stably maintain the structure of the first electrolyzing unit 210 in which the first anode chamber 211 and the second cathode chamber 222 are partitioned, for example, into an upper part and a lower part, the first diaphragm 213, i.e., the water-permeable porous membrane, may include a hard material. For example, the first diaphragm 213 may be made of an organic material such as a polymer, an inorganic material such as a metal or ceramic, or a combination thereof.

[0070] Due to the density difference, in the first anode chamber 211, chlorine gas moves to the upper part of the first anode chamber 211, sodium ions move to the lower part of the first anode chamber 211 in a state dissolved in water, and can move to the first cathode chamber 212 through the first diaphragm 213. Also, in the first cathode chamber 212, sodium hydroxide can move to the lower part of the first cathode chamber 212 in an aqueous solution state. Accordingly, chlorine gas and aqueous sodium hydroxide solution, which are reactants for producing sodium hypochlorite, can be obtained at the upper part of the first anode chamber 211 and the lower part of the first cathode chamber 212, respectively.

[0071] FIG. 3 shows a ship balance water treatment system according to another embodiment of the present invention.

[0072] 3, the water in the first cathode chamber 212 may be at least a portion of a second water stream branched off from the first water stream and provided to the first cathode chamber 212. In some cases, due to physical or structural factors, the amount of water provided from the first anode chamber 211 to the first cathode chamber 212 may be insufficient to drive the first electrolyzer to produce a required amount of treatment agent.

[0073] In contrast, the ship's equilibrium water treatment system can replenish the amount of water provided to the first cathode chamber 212 by further including additional equipment, such as piping, for providing the second water stream, which is a raw material for hydroxide ions, from the water supply device 111 of the first feed section 110 to the first cathode chamber 212.

[0074] The first diaphragm 21 may be a cation exchange membrane. The cation exchange membrane may be a soft cation exchange membrane made of a polymer film. The cation exchange membrane allows cations, e.g., sodium ions, generated in the first anode chamber 211 to permeate and move to the first cathode chamber 212 by an ion exchange reaction with functional groups provided in the cation exchange membrane. However, since the size of the pores provided in the membrane is very small, in the nanometer (nm) range, it may be difficult for a liquid substance, e.g., water, to move smoothly from the first anode chamber 211 to the first cathode chamber 212.

[0075] In addition, the cation exchange membrane may include an additional layer and / or functional group capable of preventing hydroxide ions generated in the first cathode chamber 212 from permeating and migrating to the first anode chamber 211 .

[0076] The reaction unit 300 may generate a treatment agent, for example, sodium hypochlorite, by reacting the first anode product, for example, chlorine gas, generated in the first anode chamber 211 of the first electrolyzer 210 with the first cathode product, for example, sodium hydroxide, generated in the first cathode chamber 212. The reaction unit 300 may be an independent device or equipment connected to the first electrolyzer 210 at the front end and the injection unit 400 at the rear end through piping or the like, or may be provided integrally with the first electrolyzer 210 at the front end without a separate piping (not shown).

[0077] In the latter case, a part of the inside of the first electrolyzer 210 is provided as a space in which the first anode product and the first cathode product are collected, and the first anode product and the first cathode product are reacted in the space to generate a treatment agent. In addition, when the reaction unit 300 and the first electrolyzer 210 are provided integrally, a device or equipment for circulating at least a part of the anode product and / or the cathode product to the anode chamber and / or the cathode chamber, respectively, which is essential in a conventional diaphragm-type electrolyzer, can be omitted, and therefore the ship's balance water treatment system can be simplified and compact overall, thereby improving maintainability, economy, efficiency, etc.

[0078] The concentration of the treatment agent obtained in the reaction section 300, specifically, the concentration of the aqueous sodium hypochlorite solution may be 0.01 to 50% by weight, preferably 0.1 to 20% by weight, and more preferably 0.2 to 15% by weight.

[0079] 4 and 5 show a ship balance water treatment system according to another embodiment of the present invention.

[0080] Referring to FIG. 4, the ship balance water treatment system may further include a storage unit 500 between the reaction unit 300 and the injection unit 400 for storing the treatment agent generated in the reaction unit 300.

[0081] When the amount of the treating agent produced in the first electrolyzer 210 exceeds the amount required for treating the equilibrium water, the storage unit 500 can stably store the excess treating agent, and when the amount of the treating agent produced in the first electrolyzer 210 is insufficient, or when the first electrolyzer 210 breaks down or the operation of the first electrolyzer 210 is interrupted for maintenance, the stored treating agent is provided to the equilibrium water through the injection unit 400, so that the equilibrium water can be continuously and smoothly treated while the ship is sailing or anchored. In addition, when the operation of the first electrolyzer 210 is interrupted for a long period of time, a treating agent produced outside the ship can be injected and stored in the storage unit 500 and used to treat the equilibrium water as needed.

[0082] The storage unit 500 may be a sealed device or equipment in which one selected from the group consisting of temperature, humidity, pressure, concentration of the treatment agent, and a combination of two or more of them is controlled. For example, the storage unit 500 may further include a temperature sensor, a temperature controller, a pressure sensor, a humidity controller, a concentration sensor, a concentration controller, an outside air cutoff device, a leakage prevention device, an exhaust device for discharging gas generated during storage, etc., for ensuring the stability of the treatment agent. The leakage prevention device may include, but is not limited to, a leakage alarm, a discharge stage, a catalytic reactor and / or a neutralizer for rendering the leaked treatment agent harmless, a device for preventing diffusion through absorption and / or adsorption, etc.

[0083] The storage unit 500 and the injection unit 400 may be provided integrally, and the storage unit 500 may further include a device or equipment for checking and controlling the injection amount and state of the treatment agent.

[0084] Referring to FIG. 5, the ship balance water treatment system may further include a heat exchanger 600 for cooling the first electrolyzer 210 using the treatment agent stored in the storage unit 500 .

[0085] The heat exchanger 600 may include a cooling jacket connected to one surface of the first anode chamber 211 and the first cathode chamber 212 of the first electrolyzer 210 by welding, and a pipe connecting the cooling jacket to the storage unit 500. A part of the treatment agent stored in the storage unit 500, for example, a sodium hypochlorite aqueous solution, may pass through the inside of the cooling jacket through the pipe and act as a refrigerant that absorbs heat generated by a reaction in the first electrolyzer 210. In this case, a circulation device for anode products and / or cathode products and / or a separate heat exchanger provided in the circulation device for controlling heat generation in the conventional electrolyzer may be omitted, and therefore the entire system for treating ship balance water may be simplified and compact, and maintenance, economy, efficiency, etc. may be improved.

[0086] FIG. 6 shows a ship balance water treatment system according to another embodiment of the present invention.

[0087] 6, the ship equilibrium water treatment system may further include a metal hydroxide generating unit including: a second tank 122 storing a metal salt having two or more metal ions in a molecule, specifically, two or more moles of metal ions; a second feed unit 120 including a second raw material supply device 123 for mixing the metal salt and a third water stream branched from the first water stream to provide a metal salt aqueous solution; a second anode chamber 221 for reacting the metal salt aqueous solution to obtain a second anode product; a second cathode chamber 222 for reacting a fourth water stream branched from at least one of the first to third water streams or provided from the second anode chamber 221 with metal ions provided from the second anode chamber 221 to obtain a second cathode product; and a second electrolysis unit 220 including a second diaphragm 223 separating the second anode chamber 221 and the second cathode chamber 222; and a connection unit 700 for combining the second cathode product and the first cathode product and providing it to the reaction unit 300.

[0088] The second tank 122 may store a metal salt containing two or more moles of metal ions in a molecule. The metal salt containing two or more moles of metal ions in a molecule may be dissolved in a third water stream branched from the first water stream provided by the water supply device 111 and provided to the second anode chamber 221 of the second electrolyzer 220 in an aqueous solution state.

[0089] The second tank 122 can store solid metal salt supplied from the outside, and can receive tap water, purified water, and / or seawater from which impurities have been filtered out from the water supply device 111 to generate the metal salt aqueous solution, preferably a saturated metal salt aqueous solution, in the second raw material supply device 123 and provide it to the second anode chamber 221 of the second electrolysis unit 220.

[0090] The second tank 122 may include a metal salt supplying section (not shown) through which the metal salt is supplied in a solid state from the outside, an inlet pipeline through which a third water stream is provided from the water supplying device 111, an inlet pipeline through which the second anode product is provided from the second anode chamber 221, a metal salt saturated aqueous solution discharge pipeline through which the saturated aqueous solution is discharged, and an exhaust pipeline through which gas generated inside the second tank 122 can be discharged.

[0091] The metal salt may have a structure according to the formula: <expression> M x A y

[0092] In the formula, M is a monovalent or divalent metal ion, x is an integer of 2 or greater, A is an anionic substance capable of binding to a metal ion (M), and y can be an integer satisfying the formula.

[0093] The metal ion is a sodium ion (Na + ), potassium ion (K + ), lithium ion (Li + ), and / or beryllium ions (Be 2+ ), magnesium ion (Mg 2+ ), calcium ion (Ca 2+ ), strontium ion (Sr 2+ ), barium ion (Ba 2+ ), radium ion (Ra 2+ The metal ion may be, but is not limited to, an alkaline earth metal ion such as cation (C1) or cation (D2), preferably an alkali metal ion, and more preferably a sodium ion. In particular, the metal ion may be the same as the cation provided from the first anode chamber 211 to the first cathode chamber 212 through the first diaphragm 213, i.e., the same type.

[0094] The anionic substance is carbonate ion (CO 3 2- ), sulfate ion (SO 4 2-), persulfate ion ((S 2 O 8 ) 2- )), phosphate ion (PO 4 3- ), hydrogen phosphate ion (HPO 4 2- ) and a combination of two or more of them, preferably carbonate ion, but is not limited thereto. In addition, the sodium salt formed by combining the sodium ion with the anionic substance is sodium carbonate (Na 2 CO 3 ), sodium bicarbonate (NaHCO 3 ), Sodium sulfate (Na 2 SO 4 ), Sodium persulfate (Na 2 S 2 O 8 ), Sodium phosphate tribasic (Na 3 PO 4 ), dibasic sodium phosphate (Na 2 HPO 4 ) and combinations of two or more thereof, preferably sodium carbonate, but is not limited thereto.

[0095] The second electrolysis unit 220 may include a second anode chamber 221 for reacting the metal salt aqueous solution to obtain a second anode product, a second cathode chamber 222 for reacting a fourth water stream, which is branched from at least one of the first to third water streams or is provided from the second anode chamber 221, with metal ions provided from the second anode chamber 221 to obtain a second cathode product, and a second diaphragm 223 for partitioning the second anode chamber 221 and the second cathode chamber 222. When the fourth water stream is at least a part of the third water stream, which is a solvent of the metal salt aqueous solution provided to the second anode chamber 221, passing through the second diaphragm 223 from the second anode chamber 221 and provided to the second cathode chamber 222, the separate fourth water stream branched from at least one of the first to third water streams may be appropriately omitted.

[0096] The second anode chamber 221 can be equipped with an anode and can carry anode water and gaseous substances containing substances generated by the electrolysis reaction at the anode. Further, the second cathode chamber 222 can be equipped with a cathode and can carry cathode water and gaseous substances containing substances generated by the electrolysis reaction at the cathode.

[0097] For example, when the metal salt is sodium carbonate (Na 2 CO 3 ), when a preset voltage is applied to the second electrolysis unit 220, the following substances can be generated in the second anode chamber 221 and the second cathode chamber 222.

[0098] In the second anode chamber 221, an aqueous sodium salt solution is electrolyzed to generate sodium ions (Na + ), carbon dioxide gas (CO 2 ), and oxygen gas (O 2 ). In the second cathode chamber 222, the fourth water stream is electrolyzed to generate hydrogen gas (H 2 ) and hydroxide ions (OH - ). The sodium ions generated in the second anode chamber 221 can move through the second diaphragm 223 to the second cathode chamber 222 and react with the hydroxide ions pre-generated in the second cathode chamber 222 to generate sodium hydroxide.

[0099] When the raw material substances provided by the first and second raw material supply devices are brine and aqueous sodium carbonate solution respectively, the sodium hydroxide generated in the second cathode chamber 222 of the second electrolysis unit 220 and the sodium hydroxide generated in the first cathode chamber 212 of the first electrolysis unit 210 move to the connecting portion 700 and are combined with each other to be provided to the reaction portion 300 as a raw material for generating sodium hypochlorite. If necessary, it can be used as a buffer to adjust the pH of the sodium hypochlorite generated in the reaction portion 300 to enhance storage safety.

[0100] In addition, the second electrolyzing unit 220 may further include a storage unit (not shown) between the second cathode chamber 222 and the connecting unit 700 for storing the metal hydroxide, preferably sodium hydroxide, more preferably the aqueous sodium hydroxide solution, generated in the second cathode chamber 222. In this case, the storage unit 500 for storing the treatment agent generated in the reaction unit 300 may be referred to as a first storage unit, and the storage unit (not shown) for storing the aqueous sodium hydroxide solution may be referred to as a second storage unit.

[0101] Meanwhile, when the second electrolysis unit 220 is suspended from operation for inspection, maintenance, etc., or is temporarily removed from the ship's equilibrium water treatment system, and the ship's equilibrium water treatment system does not substantially include the second electrolysis unit 220, the metal hydroxide may be directly injected into the reaction unit 300 from outside the ship, or may be injected and stored in the second storage unit and then injected into the reaction unit 300 as needed.

[0102] The second tank 122, a pipe for supplying the metal salt aqueous solution to the second anode chamber 221, the second anode chamber 221, and a pipe for supplying the second anode product to the second tank 122 may form a closed loop. The term "closed loop" used in this specification means that the transfer, circulation, etc. of materials through the second tank 122, a pipe for supplying the metal salt aqueous solution to the second anode chamber 221, the second anode chamber 221, and a pipe for supplying the second anode product to the second tank 122 are controlled so that any material is not introduced from the outside or discharged to the outside. If necessary, the closed loop may be configured to control a gas, for example, carbon dioxide gas (CO 2 ) and / or oxygen gas (O 2 The cooling system may include an exhaust port for exhausting the cooling air.

[0103] In particular, a pipe for supplying the metal salt aqueous solution generated in the second tank 122 to the second anode chamber 221 and a pipe for supplying a material generated in the second anode chamber 221 to the second tank 122 may not include a channel through which any material may flow in from the outside or out to the outside. However, when the metal salt stored in the second tank 122 is consumed within a preset range, a necessary amount of metal salt may be replenished to the second tank 122 so that a metal salt aqueous solution of a required concentration may be continuously supplied to the second anode chamber 221.

[0104] The closed loop allows a metal hydroxide, e.g., sodium hydroxide, to be continuously and stably generated in the second cathode chamber 222 of the second electrolysis unit 220, and the generated metal hydroxide, e.g., sodium hydroxide, can be used as a raw material for generating sodium hypochlorite, a treatment agent, together with the metal hydroxide, e.g., sodium hydroxide, generated in the first cathode chamber 212 of the first electrolysis unit 210 for generating sodium hypochlorite, a treatment agent, and can be used as a buffer for adjusting the pH of the generated sodium hypochlorite to enhance storage safety, if necessary.

[0105] The ship's balance water treatment system does not inject metal hydroxide, which is required for material balance control in the first electrolysis unit 210 and the reaction unit 300 and / or stable storage of the generated treatment agent, from the outside, but is combined with the metal hydroxide generator and uses the metal hydroxide generated by the metal hydroxide generator in a substantially in-situ manner. Therefore, a separate facility (equipment required for storing, injecting, etc. the metal hydroxide) for injecting metal hydroxide from the outside into the reaction unit 300, which was essential in conventional devices or equipment for manufacturing a treatment agent, can be omitted, and therefore the burden of transporting, storing, handling, and using the metal hydroxide can be significantly reduced.

[0106] The second barrier membrane 223 may be a water-permeable porous membrane, and the types, functions, and effects of the water-permeable porous membrane are the same as those described for the first barrier membrane 213.

[0107] The second diaphragm 223 may be a cation exchange membrane. The cation exchange membrane may be a soft cation exchange membrane made of a polymer film. The cation exchange membrane allows metal ions generated in the second anode chamber 221 to permeate and move to the second cathode chamber 222 by an ion exchange reaction with functional groups provided in the cation exchange membrane, and in some cases, water molecules may form hydrates together with the metal ions and permeate and move to the second cathode chamber 222 through the cation exchange membrane.

[0108] However, since the size of the pores in the membrane is very small, measured in nanometers (nm), liquid substances, such as water, cannot move smoothly from the second anode chamber 221 to the second cathode chamber 222. Due to such physical and structural factors, the amount of water provided from the second anode chamber 221 to the second cathode chamber 222 may be insufficient to drive the second electrolysis unit and produce the required amount of metal hydroxide.

[0109] In contrast, the ship's equilibrium water treatment system can replenish the amount of water provided to the second cathode chamber 222 by further including additional equipment, such as piping, for providing the fourth water stream, which is a raw material for hydroxide ions, from the water supply device 111 of the first feed section 110 to the second cathode chamber 222.

[0110] In addition, the cation exchange membrane may include an additional layer and / or functional group capable of preventing hydroxide ions generated in the second cathode chamber 222 from permeating and migrating to the second anode chamber 221 .

[0111] FIG. 7 shows the first and second electrolysis units according to one embodiment of the present invention.

[0112] 7, the first and second electrolyzers 220 may be connected in parallel to each other. The term "parallel connection" used herein means a state in which no material transfer and / or exchange occurs between the first and second electrolyzers 220, such as a product of the first electrolyzer 210 being fed to the second electrolyzer 220 as a raw material, or conversely, a product of the second electrolyzer 220 being fed to the first electrolyzer 210 as a raw material, and the first and second electrolyzers 220 are connected such that the feed material is fed to the first and second electrolyzers 220 and the product is discharged from the first and second electrolyzers 220 independently. However, piping for feeding, discharging, and transporting the same material may be integrated into a single piping, if necessary.

[0113] FIG. 7 illustrates an example in which a single second electrolysis unit 220 and a plurality of first electrolysis units 210 are arranged sequentially and continuously, but is not limited to this, and the ship's balance water treatment system may / may have a plurality of second electrolysis units 220, the first and second electrolysis units 220 may / may be arranged alternately with each other, or the second electrolysis unit 220 may be arranged between a plurality of first electrolysis units 210 arranged continuously.

[0114] In the second electrolysis unit 220, the metal salt saturated aqueous solution circulates through the second anode chamber 221 and the second tank 122, and the second cathode chamber 222 converts the water provided from the water supply device 111 into metal hydroxide and discharges it to the outside of the second electrolysis unit 220.

[0115] In the first electrolysis unit 210, the first anode chamber 211 converts the raw aqueous solution, for example, saturated salt water, provided from the first tank 112 into chlorine gas and discharges it outside the first electrolysis unit 210, and the first cathode chamber 212 converts the water provided from the water supply device 111 into a metal hydroxide, for example, sodium hydroxide, and discharges it outside the first electrolysis unit 210.

[0116] The piping for supplying water to the first and second cathode chambers 222 and the piping for supplying the raw aqueous solution, for example, saturated salt water, to the plurality of first anode chambers 211 may be branched from a single piping. Also, the piping for transporting the metal hydroxide, for example, sodium hydroxide, produced in the first and second cathode chambers 222 and the chlorine gas produced in the plurality of first anode chambers 211 to the reaction section 300 may be integrated into a single piping.

[0117] At least one of the first and second electrolyzing units 220 may be automatically controlled depending on the pH of the treatment agent, for example, the sodium hypochlorite aqueous solution, generated in the reaction unit 300 .

[0118] For example, when the pH of the sodium hypochlorite aqueous solution obtained in the reaction unit 300 is lower than a preset range, the second electrolysis unit 220 can be further activated to generate an excess amount of sodium hydroxide relative to chlorine gas, and conversely, when the pH of the sodium hypochlorite aqueous solution obtained in the reaction unit 300 is higher than a preset range, the reaction in the second electrolysis unit 220 can be delayed or the reaction efficiency can be reduced to reduce the amount of sodium hydroxide generated. The amount of sodium hydroxide generated according to the pH of the sodium hypochlorite aqueous solution obtained in the reaction unit 300 can be automatically controlled by sensors, controllers, valves, pumps, etc. electrically connected to each other.

[0119] The ship balance water treatment system may further include a hydrogen gas treatment unit (not shown). The hydrogen gas treatment unit may store hydrogen gas that is actually generated or theoretically generated in at least one of the first and second cathode chambers 212 and 222, and use it as a raw material for driving a fuel cell, or may convert the hydrogen gas into water by contacting it with a hydrogen oxidation catalyst and circulate it in the water supply unit 111, or may appropriately dilute it and discharge it to the outside. The hydrogen gas treatment unit may be provided inside and / or around at least one of the first and second cathode chambers 212 and 222. The hydrogen gas treatment unit may include, for example, a leakage alarm, a discharge stage, a catalytic reactor and / or a neutralizer that renders leaked hydrogen gas harmless, a device that prevents diffusion through absorption and / or adsorption, and the like, but is not limited thereto.

[0120] The above description of the present invention is for illustrative purposes only, and those skilled in the art will understand that the present invention can be easily modified in other specific forms without changing the technical idea or essential features of the present invention. Therefore, the above-described embodiments should be understood to be illustrative and not limiting in all respects. For example, each component described as a single type may be implemented in a distributed form, and similarly, each component described as a distributed type may be implemented in a combined form.

[0121] The scope of the present invention is defined by the following claims, and all modifications and variations that fall within the meaning and scope of the claims and their equivalent concepts should be construed as being included in the scope of the present invention. [Explanation of symbols]

[0122] 110: First feed section 111: Water supply device 112: First tank 113: First raw material supply device 120: Second feed section 122: Second tank 123:Second raw material supply device 210: First electrolysis section 211: First anode chamber 211': Anode plate 212: First cathode chamber 212': cathode plate 213: first diaphragm 220: Second electrolysis section 221: Second anode chamber 222: second cathode chamber 223: second diaphragm 300: Reaction section 400: Injection section 500: Storage section 600: Heat exchange section 700: Connection part

Claims

1. A ship balance water treatment system installed inside a ship, a first feed section including a first tank in which sodium chloride is stored, a water supply device that provides a first water stream to the first tank, and a first raw material supply device that mixes the sodium chloride and the first water stream to produce an aqueous sodium chloride solution; a first electrolysis section including a first anode chamber in which the sodium chloride aqueous solution is reacted to obtain a first anode product of sodium ions and chlorine, a first cathode chamber in which water and the sodium ions of the first anode product provided from the first anode chamber are reacted to obtain a first cathode product of sodium hydroxide, and a first diaphragm separating the first anode chamber from the first cathode chamber; A reaction section for reacting the chlorine of the first anode product and the sodium hydroxide of the first cathode product to obtain sodium hypochlorite; and an injection section for providing the sodium hypochlorite to the equilibrium water; The water in the first cathode chamber is at least a part of the first water stream, which is a solvent of the sodium chloride aqueous solution provided to the first anode chamber, passing through the first diaphragm from the first anode chamber to be provided to the first cathode chamber, The first membrane is a water-permeable porous membrane; The first anode chamber includes two or more anode plates protruding at a predetermined interval, The first cathode chamber includes two or more cathode plates protruding at a predetermined interval into the space between the anode plates, the first diaphragm is located in a space between the anode plate and the cathode plate; the first diaphragm partitions the first anode chamber and the first cathode chamber so that the first electrolysis section is located above and below the first electrolysis section, respectively, thereby physically forcing the direction of material movement in the first electrolysis section to be from the first anode chamber to the first cathode chamber; Ship balance water treatment system.

2. The ship equilibrium water treatment system of claim 1 , wherein the water in the first cathode chamber is at least a portion of a second water stream branched off from the first water stream and provided to the first cathode chamber.

3. The ship equilibrium water treatment system of claim 2 , wherein the first membrane is a cation exchange membrane.

4. The ship equilibrium water treatment system according to claim 1 , further comprising a storage section for storing the sodium hypochlorite between the reaction section and the injection section.

5. The ship equilibrium water treatment system according to claim 4 , further comprising a heat exchanger that cools the first electrolysis unit by using the sodium hypochlorite stored in the storage unit.

6. The ship equilibrium water treatment system according to claim 1, wherein the concentration of the sodium hypochlorite obtained in the reaction section is 0.01 to 50% by weight.

7. The ship balance water treatment system according to claim 1 , wherein the first feed unit further comprises a raw aqueous solution treatment device for removing impurities contained in the generated sodium chloride aqueous solution.

8. The ship balance water treatment system comprises: a second feed section including a second tank for storing sodium carbonate, and a second raw material supply device for mixing the sodium carbonate and a third water stream branched off from the first water stream to provide an aqueous sodium carbonate solution; a second electrolysis section including a second anode chamber in which the sodium carbonate aqueous solution is reacted to obtain sodium ions as a second anode product, a second cathode chamber in which a fourth water stream branched off from at least one of the first to third water streams or provided from the second anode chamber and the sodium ions of the second anode product provided from the second anode chamber are reacted to obtain sodium hydroxide as a second cathode product, and a second diaphragm separating the second anode chamber from the second cathode chamber; and 2. The ship equilibrium water treatment system of claim 1, further comprising a sodium hydroxide generating section including: a connection section for combining the sodium hydroxide of the second cathode product and the sodium hydroxide of the first cathode product and providing them to the reaction section.

9. The second tank, a pipe connecting the second tank and the second raw material supply device, for supplying the sodium carbonate aqueous solution to the second anode chamber; The second anode chamber and a pipe for supplying the sodium ions of the second anode product to the second tank form a closed loop.

9. A vessel balance water treatment system according to claim 8.

10. 10. The ship balance water treatment system of claim 9, wherein the closed loop includes an exhaust port for exhausting gases entrained in materials circulating along the closed loop.

11. The ship balance water treatment system according to claim 8, wherein the second membrane is a water-permeable porous membrane.

12. The vessel balance water treatment system of claim 8, wherein the second membrane is a cation exchange membrane.

13. The ship balance water treatment system according to claim 8, wherein the first and second electrolysis units are connected in parallel to each other.

14. The ship balance water treatment system according to any one of claims 1 to 13, further comprising a hydrogen gas treatment section.

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