KR20110118871A - Production apparatus of alkaline metal salt solution using the evaporation of seawater for advanced electrolysis systems of ballast water treatment - Google Patents

Abstract

PURPOSE: A seawater evaporating mode-based electrolyte manufacturing apparatus for an electrolysis-based ballast water treating apparatus is provided to overcome electrolyte supplement-related inconvenience and to stably supply electrolyte for the operation of an electrolysis reactor. CONSTITUTION: A seawater evaporating mode-based electrolyte manufacturing apparatus includes an electrolyte storing bath, an electrolyte supplying pump, and an electrolyte manufacturing unit. Electrolyte is stored in the electrolyte storing bath. The electrolyte supplying pump supplies the electrolyte to be injected in raw water. The raw water is supplied into the electrolysis reactor. The electrolyte manufacturing unit introduces the seawater and concentrates the seawater based on an evaporating process to manufacture electrolyte with the pre-set concentration or more of salinity. The generated electrolyte is supplied to and stored in the electrolyte storing bath. The electrolyte manufacturing unit manufactures and supplies the electrolyte to control the electric conductivity of the raw water.

Description

Production apparatus of alkaline metal salt solution using the evaporation of seawater for Advanced electrolysis systems of ballast water treatment}

The present invention relates to a device for producing and supplying an alkali metal-based electrolyte by evaporating seawater, and in particular, raw water supplied to an apparatus for treating ballast water of an electrolysis method is applied to raw water so as to sufficiently maintain the electrical conductivity required for electrolysis. The present invention relates to a seawater evaporation type electrolyte production apparatus for a ballast water treatment apparatus of an electrolysis method in which an electrolyte added or used as raw water is prepared using seawater.

In general, ships are applied to ballast tanks (also called "ballast ball tanks") to maintain stability when cargo is not loaded and to promote propulsion efficiency. In order to reduce the center of gravity of the ship according to the loading and unloading of the cargo and to ensure safe navigation, a plurality of symmetrical structures are provided on the left and right sides of the ship, each tank is independent so that the seawater filled does not move.

Therefore, as the ship is repeatedly loaded and unloaded, the ballast water tank is repeatedly filled with seawater, and the process of discharging is repeated. At this time, various solids such as marine life introduced with the seawater become sediment during operation.

When suspended solids are settled, when the seawater is discharged from the ballast water tank, it is not discharged with the seawater, but accumulates on the bottom. do.

Furthermore, when loading cargo, the ballast tanks are emptied, which releases tons of water in the tanks, causing the release of pathogens, mollusks, and fish, adversely affecting the surrounding ecosystem, such as the Great Lakes. ) Has at least 185 species of foreign marine life, and ballast water has been criticized as a major cause of this influx of foreign marine life.

As the environmental pollution and ecosystem disturbance caused by the ballast water intensify, various ballast water treatment methods and devices have been invented and applied, and among the various ballast water treatment devices, Development of ballast water treatment apparatus of electrolysis method that kills organisms contained in ballast water by using chlorine gas or hypochlorous acid (HClO or ClO-) is active.

1 shows a conceptual diagram of an apparatus for treating ballast water of an electrolysis method.

The ballast water treatment apparatus of the electrolysis method is a ballast water pump 20 for supplying the seawater through the seawater inlet 10 to each ballast water tank 70 and the ballast water pump ( An electrolysis reactor 30 that receives a portion of seawater introduced by 20) and produces electrolytic water, and a gas separator 40 that separates / discharges hydrogen gas in the electrolyzed water generated by the electrolysis reactor 30; It is composed of an electrolyte injection pump 50 that provides the raw water to be supplied to the ballast water tank 70, the concentrated hydrochloric acid concentrated through the gas separator 40. In the figure, reference numeral 61 is a pressure reducing valve, and 62 is a seawater inflow control valve.

On the other hand, in the case of producing chlorine gas or hypochlorous acid using the electrolysis reaction as described above, the efficiency of the electrolysis reactor is affected by the electrical conductivity of the raw water and the concentration of chlorine ions present in the raw water, so that the salinity In the case of treating low raw water, the electrolytic reaction efficiency is lowered due to the low electric conductivity, which leads to a decrease in the overall efficiency of the process, and there is a problem that a power supply for supplying current to the electrolysis reactor must be excessively designed. .

The present invention has been made in consideration of the above problems, and an object of the present invention is to easily prepare the electrolyte added to the raw water to evaporate seawater in the vessel in order to maintain the electrical conductivity of the raw water supplied to the electrolysis reactor in a suitable range. And it provides a seawater evaporation electrolyte production apparatus for ballast water treatment device of the electrolysis method to be able to supply.

The seawater evaporation electrolyte production apparatus for an electrolysis-type ballast water treatment apparatus of the present invention, which accomplishes the above-mentioned objects and performs a problem for eliminating the drawbacks of the present invention, is characterized in that An electrolyte manufacturing apparatus for manufacturing an electrolyte injected into raw water in order to maintain an electrical conductivity of raw water supplied to a decomposition reactor above a set value, the electrolyte manufacturing apparatus comprising: an electrolyte storage tank in which an electrolyte is stored; An electrolyte supply pump which sends an electrolyte to inject the electrolyte stored in the electrolyte reservoir into the raw water supplied to the electrolysis reactor; And an electrolyte manufacturing means for introducing the seawater and concentrating the introduced seawater using an evaporation method to generate an electrolyte having a predetermined concentration or more, and supplying and storing the electrolyte in the electrolyte reservoir.

At this time, the electrolyte manufacturing means, the regeneration chamber having a sea water inlet for receiving sea water, and an air inlet for receiving air; A heat exchanger receiving the seawater of the regeneration chamber to heat the seawater by heat exchange with a heat source supplied from the outside; A spray nozzle provided at an upper end of the regeneration chamber to spray the seawater heated up through the heat exchanger to the regeneration chamber; A circulation pump circulating the seawater of the regeneration chamber to a heat exchanger and a spray nozzle; And measuring the electrical conductivity of the seawater circulated by the circulation pump, and when the electrical conductivity of the seawater is greater than or equal to a predetermined value, the recovery valve installed on the conduit connected to the electrolyte reservoir is opened so that the electrolyte produced through the seawater evaporation is stored in the reservoir. It consists of an electrical conductivity meter that is stored.

On the other hand, the regeneration chamber may be configured by using a ballast water tank located at the stern of the vessel.

In addition, the electrolyte manufacturing means, the stern ship ballast water tank having a seawater inlet for receiving seawater, and an air inlet for receiving air; A natural convection heat exchanger positioned inside the stern ballast water tank and heating the seawater in the stern ship ballast water tank using a heat source supplied from the outside; A spray nozzle provided at an upper end of the stern ship ballast water tank to spray seawater in the stern ship ballast water tank to the inside of the stern ship ballast water tank; A circulating pump for circulating by supplying seawater in the stern ballast water tank to the spray nozzle; And measuring the electrical conductivity of the seawater circulated by the circulation pump, and when the electrical conductivity of the seawater is greater than or equal to a predetermined value, the recovery valve installed on the conduit connected to the electrolyte reservoir is opened so that the electrolyte produced through the seawater evaporation is stored in the reservoir. It may be configured as an electrical conductivity meter to be stored.

On the other hand, in order to increase the contact efficiency of the sea water and air sprayed through the spraying device further includes a packing disposed in the lower portion of the spraying device.

According to the present invention having the above characteristics, the electrolyte supplied in order to maintain the electrical conductivity in the electrolysis reactor for the treatment of ballast water at all times above a certain level so that it can be produced and supplied in the ship through the evaporation of sea water Therefore, it is possible to more stably supply the electrolyte required for the stable operation of the electrolysis reactor, and it is possible to solve the administrative inconvenience of periodically replenishing the electrolyte.

1 is a conceptual diagram of a ballast water treatment device of the electrolysis method,
2 is a conceptual diagram of a ballast water treatment apparatus including a facility for additionally supplying electrolyte to raw water supplied to an electrolysis reactor;
3 is a graph showing the relationship between the salt concentration and the electrical conductivity of the solution,
4 is a conceptual diagram showing the structure of an electrolyte manufacturing apparatus according to an embodiment of the present invention,
5 is a conceptual diagram showing the structure of an electrolyte manufacturing apparatus constructed using a ballast water tank;
Figure 6 is a conceptual diagram showing the structure of the electrolyte production apparatus using a natural convection heat exchanger, while configuring the electrolyte production apparatus using a ballast water tank.

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

2 shows a conceptual diagram of a ballast water treatment apparatus including a facility for additionally supplying electrolyte to raw water supplied to an electrolysis reactor.

The ballast water treatment apparatus additionally supplies an alkali metal-based electrolyte prepared by seawater evaporation to the raw water for electrolysis, that is, the raw water supplied to the electrolysis reactor 30, so that the electrolyte solution in the electrolysis reactor 30 is electrolyzed. In order to maintain the required sufficient electrical conductivity, the seawater inlet 10, ballast water pump 20, electrolysis reactor 30, gas separator 40, electrolyte injection pump 50, pressure reducing valve (61), based on a well-known electrolysis vessel ballast water treatment device consisting of a seawater inlet control valve 62, the production of an electrolyte for producing and supplying electrolyte to the raw water flowing into the electrolysis reactor (30) By further supplying the device 100 so that the concentration of the electrolyte contained in the raw water to maintain a certain level or more, the electrical conductivity in the electrolysis reactor 30 is always It is configured to be maintained above jeongsujun. Of course, the seawater inlet control valve 62 may be closed, and the electrolyte of the electrolyte reservoir 110 provided in the electrolyte manufacturing apparatus 100 may be supplied to the electrolysis reactor 30 to produce electrolytic water.

On the other hand, the ballast water treatment apparatus of the known electrolysis method to which the present invention is applied electrolysis reactor 30 by using a ballast water pump 20 a portion of the ballast water introduced into the vessel seawater inlet 10 Pumping), and separating / discharging the hydrogen gas from the gas separator 40 and injecting the hypochlorous acid concentrate produced by using the electrolyte injection pump 50 connected to the bottom of the ballast water tank (70) side Have

Figure 3 shows a graph showing the relationship between the salt concentration and the electrical conductivity of the solution.

In general, the electrical conductivity of an electrolyte such as seawater is directly proportional to the concentration of salt, so that the higher the salt concentration, the higher the electrical conductivity. Thus, an alkali metal electrolyte prepared by the seawater evaporation method is added to the raw water flowing into the electrolysis reactor 30. In this case, the solution resistance in the electrolysis reactor 30 decreases, so that the current and voltage efficiency increase in the electrolysis reactor 30 can be expected, and the present invention uses seawater in the ship as the electrolyte manufacturing apparatus 100. An electrolyte is prepared, and the prepared electrolyte is supplied to raw water so as to optimally maintain electrical conductivity in the electrolysis reactor 30.

4 is a conceptual diagram illustrating a structure of an electrolyte manufacturing apparatus according to one embodiment of the present invention.

The seawater evaporation electrolyte production apparatus 100 for an electrolysis-type ballast water treatment apparatus according to the present invention includes an electrolyte storage tank 110, an electrolyte supply pump 120, and an electrolyte production unit 130.

The electrolyte reservoir 110 is to store the electrolyte produced by the electrolyte manufacturing means 130, a water level meter 111 for confirming the amount of the stored electrolyte, and an electrical conductivity meter for detecting the electrical conductivity of the stored electrolyte ( 112 is provided, the electrolyte production means 130 is operated if it does not meet the required capacity.

The electrolyte supply pump 120 sends the electrolyte so that the electrolyte stored in the electrolyte reservoir 110 is mixed with the raw water introduced into the electrolysis reactor 30. In this case, the electrolyte supply pump 120 compares the actual electrical conductivity in the electrolysis reactor 30 with the electrical conductivity set by the manager, and controls the injection amount of the electrolyte in response to the result, and of course, the electrolyte supply pump ( 120 is controlled by a controller not shown.

The electrolyte manufacturing means 130 introduces seawater and concentrates the introduced seawater by using an evaporation method to prepare a seawater electrolyte having a salt of a predetermined concentration or more, and then stores the prepared alkali metal electrolyte in the electrolyte storage tank 110. Thus, it is possible to provide an electrolyte if necessary, and comprises a regeneration chamber 131, a heat exchanger 132, a spray nozzle 133, a circulation pump 134, an electrical conductivity meter 135 have.

The regeneration chamber 131 is provided with a seawater inlet 1311 for receiving the seawater introduced by the pump or the ballast water pump 20, and an air inlet 1312 for smooth circulation of the air. .

The heat exchanger 132 receives the heat source from the seawater stored in the regeneration chamber 131 and a boiler not shown to heat the seawater by heat-exchanging the seawater and the heat source.

The spray nozzle 133 is to spray the seawater heated up through the heat exchanger 132 in the upper portion of the regeneration chamber 131 to promote the evaporation of seawater. The spray nozzle 133 is installed to the upper end of the regeneration chamber 131 is configured to spray the heated sea water into the regeneration chamber 131. Meanwhile, since the equilibrium vapor pressure of the air in the regeneration chamber 131 is increased due to the heated sea water, the amount of evaporation of the sea water may be increased in the process of being sprayed into the regeneration chamber 131 through the spray nozzle 133.

The circulation pump 134 circulates the seawater stored in the regeneration chamber 131 to the heat exchanger 132 and the spray nozzle 133 so that the heated seawater is injected into the regeneration chamber 131. Meanwhile, the circulation of the seawater by the circulation pump 134 is closed in the recovery valve 136 and the supply valve 137 installed on the conduit connected to the electrolyte reservoir 110, and the circulation valve 138 is circulated in the open state. By operating the pump 134, the circulation of seawater is achieved.

The electrical conductivity meter 135 measures the electrical conductivity of seawater circulated to the heat exchanger 132 and the spray nozzle 133 by the circulation pump 134 to determine whether the seawater is converted into an alkali metal electrolyte having a required salt concentration. To check. The electrical conductivity meter 135 for measuring the electrical conductivity of the sea water circulated in this way is installed in the circulation line is the circulation of the sea water.

On the other hand, since the salt concentration and the electrical conductivity of the sea water is proportional, the salt concentration of the sea water can be confirmed by measuring the electrical conductivity of the sea water. Therefore, if the electrical conductivity of the seawater is circulated by measuring the electrical conductivity of the seawater or more than the set value, the recovery valve 136 installed on the pipe connected to the electrolyte reservoir 110 is opened to the alkali metal-based electrolyte produced through the seawater evaporation The electrolyte is stored in the reservoir 110.

On the other hand, the lower portion of the spray nozzle 133 is preferably provided with a packing (139) for increasing the contact efficiency of the sea water and the air sprayed, the packing 139 is overlapping multiple layers of non-metallic corrugated plate It may be configured to have a stacked structure or stacked pipe pipe form, the packing 139 is the air flow attracted by the fan while the seawater sprayed from the spray nozzle 133 flows down the surface of the packing It is made of a structure in contact with and can increase the contact efficiency of sea water and air. Such a packing 139 is applied to the cooling tower to have the same configuration and effect as a known filler (see Published Patent Publication No. 2009-0036173) to increase the contact time and area of the cooling water and air, and for the packing 139 More detailed description will be omitted.

In addition, an exhaust fan 140 is further installed at the upper end of the spray nozzle 133 so that air introduced into the regeneration chamber 131 through the air inlet 1312 is discharged to the outside while containing water vapor due to sea water evaporation. It is desirable to.

By repeating the process of circulating the seawater to the regeneration chamber 131, the heat exchanger 132 and the spray nozzle 133 as described above, the seawater is concentrated, and when the electrolyte is above a certain concentration, the electrical conductivity meter installed in the circulation line 135 confirms this, and opens the recovery valve 136 to store the prepared electrolyte in the electrolyte reservoir 110.

5 is a conceptual diagram showing the structure of an electrolyte manufacturing apparatus constructed using a ballast water tank.

Regeneration chamber 131, heat exchanger 132, spray nozzle 133, circulating pump 134, electrical conductivity meter 135, as described above, and manufacturing an electrolyte to produce the required electrolyte through the sea water evaporation method In the means 130, the regeneration chamber 131 may be configured using the ballast water tank 150 provided on the stern of the vessel.

At this time, except for the regeneration chamber 131, the heat exchanger 132, the spray nozzle 133, the circulation pump 134, the conductivity meter 135, the recovery valve 136, the supply valve 137, the circulation valve 138 Since the configuration and effects are the same as those of the electrolyte manufacturing apparatus 100 described with reference to FIG. 4, the detailed description is omitted and the same reference numerals are used.

Meanwhile, in configuring the regeneration chamber using the ballast water tank 150, an air inlet 151 and an exhaust fan 152 for circulation of air are provided in the ballast water tank 150. After the seawater of the tank 150 passes through the heat exchanger 132 by the circulation pump 134, the seawater is concentrated by repeating the spraying of the ballast water tank 150 through the spray nozzle 133, thereby concentrating the seawater. When the electrolyte is above a certain concentration, the electrical conductivity meter 135 installed in the circulation line checks this and opens the recovery valve 136 to store the prepared electrolyte in the electrolyte storage tank 110.

FIG. 6 is a conceptual diagram showing the structure of an electrolyte manufacturing apparatus using a ballast water tank, but configured using a natural convection heat exchanger.

In the regeneration chamber of the electrolyte production means 130 using the ballast water tank 150 provided at the stern of the vessel as described above, it may be configured by applying the natural convection heat exchanger (141).

When the natural convection heat exchanger 141 is to be applied as described above, the natural convection heat exchanger 141 is installed at the lower end of the ballast water tank 150, and the natural convection heat exchanger 141 is not shown. The heat source is supplied from the boiler to raise the seawater in the ballast water tank 150, and the equilibrium vapor pressure in the air in the ballast water tank 150 is increased due to the temperature increase of the seawater.

In this state, the seawater circulated by the circulation pump 134 may be sprayed into the ballast water tank 150 through the spray nozzle 133 to increase the evaporation effect of the seawater, and by the circulation pump 134. As seawater is circulated, the process of concentrating seawater is repeated, thereby increasing the electrical conductivity of the electrolyte.

As described above, the alkali metal-based electrolyte prepared by the seawater evaporation method from the electrolyte manufacturing means 130 is stored in the electrolyte reservoir 110, and then injected into raw water by the electrolyte supply pump 120 if necessary.

The present invention is not limited to the above-described specific preferred embodiments, and various modifications can be made by any person having ordinary skill in the art without departing from the gist of the present invention claimed in the claims. Of course, such changes will fall within the scope of the claims.

<Explanation of symbols for the main parts of the drawings>
100: electrolyte manufacturing apparatus 110: electrolyte reservoir
120: electrolyte supply pump 130: electrolyte manufacturing means
131: regeneration chamber 132: heat exchanger
(133): spray nozzle (134): circulation pump
(135): Electrical conductivity meter (139): Packing
(141): natural convection heat exchanger (150): ballast water tank

Claims (4)

In the electrolyte manufacturing apparatus 100 for producing and supplying the electrolyte injected into the raw water in order to maintain the electrical conductivity of the raw water supplied to the electrolysis reactor 30 of the ballast water treatment device of the electrolysis method ,
The electrolyte manufacturing apparatus 100,
An electrolyte reservoir 110 in which an electrolyte is stored;
An electrolyte supply pump 120 for sending an electrolyte to inject the electrolyte stored in the electrolyte reservoir 110 into the raw water supplied to the electrolysis reactor 30; And
Seawater is introduced, and by concentrating the introduced seawater by using an evaporation method, after generating an electrolyte having a salt concentration of a predetermined concentration, characterized in that it comprises an electrolyte manufacturing means 130 for supplying and storing the electrolyte reservoir 110 Seawater evaporation electrolyte manufacturing apparatus for ballast water treatment device of the electrolysis method. The method of claim 1, wherein the electrolyte manufacturing means 130,
A regeneration chamber 131 having a seawater inlet 1311 for receiving seawater and an air inlet 1312 for receiving air;
A heat exchanger 132 that receives the seawater of the regeneration chamber 131 and heats the seawater by heat-exchanging with a heat source supplied from the outside;
A spray nozzle 133 provided at an upper end of the regeneration chamber 131 to spray the seawater heated by the heat exchanger 132 to the regeneration chamber 131;
A circulation pump 134 for circulating the seawater of the regeneration chamber 131 to the heat exchanger 132 and the spray nozzle 133; And
When the electrical conductivity of the seawater circulated by the circulation pump 134 and the electrical conductivity of the seawater is greater than the set value, the recovery valve 136 installed on the pipe connected to the electrolyte reservoir 110 is opened to open the seawater evaporation Electrolyzed seawater evaporation type electrolyte manufacturing apparatus for a ballast water treatment apparatus of the electrolysis method, characterized in that consisting of an electroconductor 135 to be stored in the electrolyte reservoir 110. The method of claim 2,
The regeneration chamber 131 is a seawater evaporation electrolyte manufacturing apparatus for the ballast water treatment apparatus of the electrolysis method, characterized in that using a ballast water tank 150 located at the stern of the vessel. The method of claim 1, wherein the electrolyte manufacturing means 130,
A stern vessel ballast tank 150 having an air inlet 151 for receiving air;
Located in the stern vessel ballast water tank 150, a natural convection heat exchanger (141) for raising the seawater in the stern vessel ballast water tank 150 using a heat source supplied from the outside;
A spray nozzle 133 provided at an upper end of the stern ship ballast water tank to spray seawater in the stern ship ballast water tank 150 into the stern ship ballast water tank;
A circulation pump 134 for supplying and circulating the seawater in the stern vessel ballast water tank 150 to the spray nozzle 133;
When the electrical conductivity of the seawater circulated by the circulation pump 134 and the electrical conductivity of the seawater is greater than the set value, the recovery valve 136 installed on the pipe connected to the electrolyte reservoir 110 is opened to open the seawater evaporation Electrolyzed seawater evaporation type electrolyte manufacturing apparatus for a ballast water treatment apparatus of the electrolysis method, characterized in that consisting of an electroconductor 135 to be stored in the electrolyte reservoir 110.

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