WO2005051849A1

WO2005051849A1 - Apparatus for and method of manufacturing drinking water using seawater

Info

Publication number: WO2005051849A1
Application number: PCT/KR2004/003066
Authority: WO
Inventors: Hyung Su Kim
Original assignee: Hyung Su Kim
Priority date: 2003-11-26
Filing date: 2004-11-25
Publication date: 2005-06-09
Also published as: KR100429381B1

Abstract

Disclosed herein is the apparatus for manufacturing drinking water using seawater where a reverse osmosis treatment is performed after an ozone and magnetizing treatment. The apparatus comprises a seawater storage tank 1, an ozone generator 2, a turbulent turbine pump 3, an ejector 4, a reaction dissolving device 5, a multi-layered filter 6, an active carbon filter 7, a precision filter 10, and a reverse osmosis membrane filter 12. The reaction-dissolving device 5 is formed of a cylindrical outer wall 41, an inner wall 42, and an intermediate wall 43. A method of manufacturing drinking water using the apparatus is also disclosed. The method comprises steps of mixing seawater with ozone generated by an ozone generator 2 using a turbulent turbine pump 3 and an ejector 4, magnetizing the seawater mixed with ozone by exerting a magnetic force, filtering the magnetized seawater through a multi-layered filter 6, an active carbon filter 7, and a precision filter 10 to thereby remove contaminants from the magnetized seawater, and treating the filtered seawater using a reverse osmosis membrane filter 12, to thereby produce drinking water.

Description

Description APPARATUS FOR AND METHOD OF MANUFACTURING DRINKING WATER USING SEAWATER Technical Field

[1] The present invention relates to an apparatus for and method of manufacturing drinking water using seawater. More particularly, the invention relates to such an apparatus, in which a reverse osmosis treatment is performed after ozone and magnetization treatment, an intermediate wall having triangular holes formed at certain intervals in multiple directions is installed in a reaction dissolving device to thereby increase the solubility of ozone, thereby eliminating the necessity of a secondary ozone treatment, and accordingly shortening the manufacturing process and also simplifying the manufacturing facility. Background Art

[2] Recently, the standard of living has been improved owing to rapid industrialization of society, but the contamination of natural environment leads to a change of climate. For example, the drought, which has occurred quite often in many places of the globe, results in deficiency of drinking water. This phenomenon is expected to become worse and worse in fiiture. The attempts to solve the water deficiency are exemplified by the construction of dams and the development of underground water. The dam construction causes destruction of natural environment and resources, and also requires a huge construction cost. Therefore, it does not become an easy and complete solution. In case of the development of underground water, the water resources under ground become progressively exhausted due to indiscreet developments thereof. Also, the contamination of underground water has become more severe. Thus, this approach does not become a long term and fiindamental solution.

[3] In the industrialized counties such as USA, Japan, and Germany, a method of obtaining fresh-water from abundant seawater has been developed and used for making drinking water or industrial water. As a method of manufacturing fresh- water from seawater, for example, in the evaporation method, the seawater is heated and evaporated, and then the fresh-water is condensed. In the reverse osmosis method, the seawater is separated into fresh-water and salt water by using a high-pressure pump. The vapor compression method exerts a mechanical force to the seawater to generate vapor and obtains fresh-water by condensing the vapor. The freeze-crystallization method uses a principle in which pure water is frozen and crystallized first when the seawater is frozen since the freezing point of seawater is relatively low. Other methods include the electrolysis of seawater. Currently, the evaporation and reverse osmosis methods are most commonly used. Disclosure of Invention Technical Problem [4] In general, the seawater contains about 2.7wt% of NaCl as a major constituent, about 3,800ppm of MgCl , about l,700ppm of MgSO , about l,300ppm of CaSO , and 2 4 4 about 900ppm of K SO . 2 4

[5] Many patent applications, which relates to a method of removing the above various materials from the seawater and making fresh- water, has been filed. For example, K)rean Patent Publication No. 82-707 (issued on April 30, 1982 ) discloses a purification method using the reverse osmosis effect, which is in a small scale and can be operated with a low electric power. This patent is not suitable for mass-produce freshwater owing to its small scale, and also may cause an overload in the reverse osmosis treatment because of no preliminary treatment of the seawater. K)rean Patent Publication No. 10-227327 (issued on November 1, 1999 ) discloses an apparatus for purifying wastewater, underground water, river-water and seawater, in which a magnetic treating device dissolves ozone into the seawater, and then the ozone- dissolved seawater is filtered. In this apparatus, however, ozone is dissolved in the seawater by means of a forced agitation caused by rotation of a projection in the magnetic treating device, and thus due to its low efficiency the ozone, magnetic, and filtering treatment must be carried out twice. Therefore, the manufacturing process is complicated and an additional fresh- water manufacturing facility is required.

[6] Also, many patent applications, which relate to an ozone and magnetic treatment in a purification method of surface water or underground water, have been filed. For example, K)rean Patent Laid-Open Publication No. 97-1244 discloses a water purification apparatus and method using ozone and a magnet, in which ozone is dissolved in the water by means of a simple mechanical mixing. Japanese Patent Laid-open Publication No. Hei7- 185573 discloses a water treating system having a magnetizing device provided at the front or rear end of an ozone-treating device, which is originally directed to an improvement of sterilization efficiency. The above methods mostly use a mechanical agitation in order to dissolve ozone into the water, and thus embrace a problem in that the solubility of ozone into the water is relatively low. Technical Solution

[7] The present invention has been made in order to solve the above problems occurring in the prior art, and it is an object of the invention to provide an apparatus for and a method of manufacturing drinking water using seawater, in which a reverse osmosis treatment is carried out after an ozone and magnetization treatment, and various soluble inorganic and organic materials contained in the seawater can be removed, along with sterilization of bacteria contained therein, by means of the ozone and magnetization treatment without necessity of additional aggregating agent.

[8] Another object of the invention is to provide an apparatus for and a method of manufacturing drinking water using seawater, in which a reaction dissolving device is provided with an intermediate wall having a plurality of triangular openings formed therein at certain intervals so that the solubility ozone into the seawater can be increased adequately so as to oxidize various contaminants such as soluble inorganic and organic materials contained in the seawater, and the oxidized contaminants can be removed through a filtering device, thereby eliminating the necessity of separate secondary ozone treatment and thus simplifying the manufacturing facility and process.

[9] In order to accomplish the above objects, according to one aspect of the present invention, there is provided an apparatus for manufacturing drinking water using seawater where a reverse osmosis treatment is performed after an ozone and magnetizing treatment. The apparatus of the invention includes: a) a seawater storage tank for storing seawater taken from a bottom of neighboring seawaters; b) an ozone generator for generating ozone; c) a turbulent turbine pump for mixing, dissolving, and transferring the ozone generated in the ozone generator and the seawater stored in the seawater storage tank; d) an ejector for spraying with high-pressure the seawater transferred from the turbulent turbine pump; e) a reaction dissolving device for magnetizing the ozone-treated seawater through the turbulent turbine pump and the ejector by exerting a magnetic force to the ozone-treated seawater, the reaction dissolving device having a built-in magnetic treating device; f) a multi-layered filter, an active carbon filter, and a precision filter for removing contaminant from the seawater magnetized through the reaction dissolving device; and g) a reverse osmosis membrane filter for removing salt contents from the seawater filtered through the precision filter to thereby obtain fresh-water; h) wherein the reaction dissolving device is of a cylindrical shape with its top and bottom closed and comprises: i) an outer wall having an inlet connected to the circumference of the lower portion thereof for supplying the ozone-treated seawater from the ejector 4 to the reaction dissolving device therethrough and an outlet connected to the upper portion thereof; ii) an inner wall disposed spaced apart from the outer wall, the lower end of the inner wall being connected tightly contacted with the lower portion of the outer wall, and the upper end of the inner wall being disposed spaced apart from the upper portion of the outer wall; and iii) an intermediate wall rotatably positioned between the outer wall and the inner wall and having a plurality of treating water guide plates protruded therefrom towards the outer wall, such that the ozone-treated seawater from the ejector is transferred to the magnetic treating device in the form of turbulent flow by means of the intermediate wall rotated by the flow of the seawater.

[10] Preferably, the intermediate wall has a triangular hole formed therein at the lower portion of the treating water guide plates, and each of the treating water guide plates have a guide plate hole formed facing the flow of the ozone-treated seawater such that the seawater supplied through the inlet can be entered.

[11] The treating water guide plates are formed upwardly from the lower portion of the intermediate wall, which corresponds to the position of the inlet, in such a way as to be formed in zigzags along the circumferential direction thereof.

[12] The magnetic treating device has an inlet hole formed at the lower portion thereof through which the treating water is in-flown, and includes a diffuser for diffusing the in-flown treating water and a permanent magnet for magnetizing the treating water. The diffuser is formed of sintered filter of micro-particles, and the micro-particles is made of stainless steel and having a size of 3 ?m .

[13] Preferably, the permanent magnet includes a plurality of rod magnets arranged in such a manner that the N-pole and S-pole of the rod magnets face each other.

[14] The multi-layered filter 6 includes an anthracite layer, a sand layer, and a gravel layer in the enumerated order from the top to the bottom.

[15] According to another aspect of the invention, there is provided a method of manufacturing drinking water using seawater where a reverse osmosis treatment is performed after an ozone and magnetizing treatment using the apparatus as described above. The method of the invention includes the steps of: a) mixing seawater with ozone generated by an ozone generator using a turbulent turbine pump and an ejector; b) magnetizing the seawater mixed with ozone by exerting a magnetic force of 5,000-7,000 gauss thereto in a reaction dissolving device, which includes a magnetic treating device installed therein; c) filtering the magnetized seawater through a multi- layered filter, an active carbon filter, and a precision filter to thereby remove contaminants from the magnetized seawater; and d) treating the filtered seawater using a reverse osmosis membrane filter, to thereby produce drinking water. Advantageous Effects

[16] A ccording to the invention, the apparatus for and a method of manufacturing drinking water using seawater, in which a reverse osmosis treatment is carried out after an ozone and magnetization treatment, is provided. In the apparatus and method of the invention, various soluble inorganic and organic materials contained in the seawater can be removed, along with sterilization of bacteria contained therein, by means of the ozone and magnetization treatment without necessity of additional aggregating agent. In particular, a reaction dissolving device is provided with an intermediate wall having a plurality of triangular openings formed therein at certain intervals so that the solubility ozone into the seawater can be increased adequately so as to oxidize various contaminants such as soluble inorganic and organic materials contained in the seawater, and the oxidized contaminants can be removed through a filtering device, thereby eliminating the necessity of separate secondary ozone treatment and thus simplifying the manufacturing facility and process. Description of Drawings

[17] Further objects and advantages of the invention can be more Mly understood from the following detailed description taken in conjunction with the accompanying drawings, in which:

[18] FIG. 1 is a flow chart schematically showing the apparatus for manufacturing drinking water according to present invention;

[19] FIG. 2 is a cross-sectional view of the reaction-dissolving device of the apparatus for manufacturing drinking water;

[20] FIG. 3 shows a plan view of the reaction-dissolving device in FIG. 2;

[21] FIG. 4 is a cross-sectional view of the magnetic treating device in the reaction- dissolving device of the apparatus for manufacturing drinking water;

[22] FIG. 5 is a plan view of the intermediate wall installed in the reaction-dissolving device of the apparatus for manufacturing drinking water;

[23] FIG. 6 is a cross-sectional view of the intermediate wall in FIG. 5; and

[24] FIG. 7 is a side view of the intermediate wall in FIG. 5 Best Mode

[25] The preferred embodiments of the present invention will be hereafter described in detail with reference to the accompanying drawings.

[26] FIG. 1 shows a schematic flow of an apparatus for and a method for manufacturing drinking water using seawater according to the present invention.

[27] In the apparatus of the invention, a reverse osmosis treatment is performed after an ozone and magnetizing treatment in order to manufacture the drinking water using seawater. The apparatus of the invention comprises a seawater storage tank 1 for storing seawater taken from a bottom of neighboring seawaters, an ozone generator 2 for generating ozone, a turbulent turbine pump 3 for mixing, dissolving, and transfe rring the ozone generated in the ozone generator 2 and the seawater stored in the seawater storage tank 1, an ejector 4 for spraying with high-pressure the seawater transferred from the turbulent turbine pump 3, a reaction dissolving device 5 for magnetizing the ozone-treated seawater through the turbulent turbine pump 3 and the ejector 4 by exerting a magnetic force to the ozone-treated seawater, the reaction dissolving device 5 having a magnetic treating device 20, a multi-layered filter 6, an active carbon filter 7, and a precision filter 10 for removing contaminant from the seawater magnetized through the reaction dissolving device 5, and a reverse osmosis membrane filter 12 for removing salt contents from the seawater filtered through the precision filter 10 to thereby obtain fresh- water.

[28] Here, the reaction-dissolving device 5 is of a cylindrical shape with its top and bottom closed. In addition, the reaction dissolving device 5 comprises an outer wall 41 having an inlet 31 connected to the circumference of the lower portion thereof and an outlet 32 connected to the upper portion thereof. The ozone-treated seawater from the ejector 4 is supplied to the inlet 31. The reaction-dissolving device 5 is provided with an inner wall 42 disposed spaced apart from the outer wall 41. The lower end of the inner wall 42 is connected tightly contacted with the lower portion of the outer wall 41, and the upper end of the inner wall 42 is disposed spaced apart from the upper portion of the outer wall 41. The reaction dissolving device 5 is fiirther provided with an intermediate wall 43 rotatably positioned between the outer wall 41 and the inner wall 42 and having a plurality of treating water guide plates 51 protruded therefrom towards the outer wall 41, such that the ozone-treated seawater from the ejector is transferred to the magnetic treating device 20 in the form of turbulent flow by means of the intermediate wall rotated by the flow of the seawater.

[29] The method of manufacturing drinking water uses the apparatus having the above- described construction and comprises steps of: mixing seawater with ozone generated by the ozone generator 2 using the turbulent turbine pump 3 and the ejector 4; magnetizing the seawater mixed with ozone by exerting a magnetic force of 5,000-7,000 gauss thereto in the reaction dissolving device 5, which includes the magnetic treating device 20 installed therein; filtering the magnetized seawater through the multi-layered filter 6, the active carbon filter 7, and the precision filter 10 to thereby remove contaminants contained therein; and treating the filtered seawater using the reverse osmosis membrane filter 12, thereby manufacturing drinking water. Mode for Invention

[30] The apparatus for and the method of manufacturing drinking water using seawater will be hereafter described in greater detail.

[31] First, seawater is taken from the bottom of neighboring seawaters and in-flown into the seawater storage tank 1 through the upper portion thereof. As a separate device, an oxygen generator of PSA-mode intakes air and generates oxygen having a purity of more than 90%. Then, using the oxygen, the ozone generator 2 generates ozone gas by a silent discharge, and the generated ozone is supplied the seawater transferred from the seawater storage tank 1. The ozone are mixed with and dissolved in the seawater by means of the turbulent turbine pump 3, and simultaneously the ozone-dissolved seawater is transferred to the ejector 4. Here, the turbulent turbine pump 3 has an impeller fixed vertically to the axle thereof, and the impeller is provided with a radial groove formed in the outer circumference thereof. The seawater and ozone passes the inside of the turbulent turbine pump while repeatedly producing a turbulent current along the inner wall of the pump by means of the rotation of the impeller, so that the ozone is efficiently mixed and dissolved in the seawater.

[32] The ozone-treated seawater transferred to the ejector 4 is sprayed with a high pressure through an ejector nozzle, and at this time the ozone is dissolved and over- saturated in the seawater. The above-treated seawater is in-flown into the inside of the reaction dissolving device 5 through an inlet 31 installed in the lower end thereof.

[33] Hereinafter, the ozone-treated seawater is referred to as a 'treating water.'

[34] The treating water transferred into the reaction dissolving device 5 flows upwardly from the lower end thereof in the form of an eddy current by a guide plate 51 , which is formed in the wall face of the intermediate wall 43. That is, the intermediate wall 43 is rotatably disposed between the outer wall 41 and the inner wall 42, and the treating water guide plate 51 is positioned towards the outer wall 41. Therefore, the intermediate wall 43 is rotated by the treating water in-flown through the inlet 31 so that the treating water in-flown inside the reaction dissolving device 5 is moved upwardly along the rotating intermediate wall 43 while rotating itself, and then flows into the upper portion of a central space 100 formed in the center of the inside of the reaction dissolving device 5 At this time, ozone dissolved in the treating water is dissociated -2 -2 into O and O , and O oxidizes various dissoluble organic and inorganic materials t< 2 produce inorganic and organic colloid-forming materials, simultaneously while exhibiting a strong sterilizing power against bacteria.

[35] Thereafter, the treating water in-flown into the upper portion of the central space 100 is moved to the lower portion of the central space 100, and then moved to the inside of the magnetic treating device 20 through inlet holes 70 The inlet holes 70 are formed at certain intervals in the lower end portion of the magnetic treating device 20 in multiple directions. The ozone in the treating water is dissolved above 95% while passing through the diffuser 80 Due to the magnetic force of the permanent magnet 90, the above-described organic and inorganic colloid-forming materials are aggregated, and the treating water is transferring into the multi-layered filter 6 while being pressurized at the outlet.

[36] The diffuser contains micro-openings of 3 ?m. While the treating water passes the micro-openings of the diffuser, the remaining ozone dissolved therein contacts the inorganic and organic materials or bacteria to thereby oxidize or sterilize them.

[37] The treating water is transferred to the upper portion of the multi-layered filter 6, which is formed from the above thereof an anthracite layer, a sand layer, and a gravel layer. While passing the inside of the multi-layered filter 6, the inorganic and organic colloid-forming materials produced in the magnetic treating device 20 are adsorbed and removed, and then the treating water is discharged through the lower portion of the multi-layered filter 6 and transferred into the active carbon filter 7.

[38] The active carbon filter 7 is filled with fine active carbon. While the treating water passes the active carbon filter 7, the remaining ozone and organic materials are adsorbed or dissociated and the filtered treating water is transferred to the treating water storage tank 8 and stored therein. The stored treating water is transferred by the pump 9 to the precision filter 10, in which fine particles are filtered. Then, the above- filtered treating water is transferred to the reverse osmosis membrane filter 12 by the high-pressure pump 11, where the high concentration of salt is removed by the reverse osmosis principle, thereby producing drinking water. The reverse osmosis membrane is a semi-permeable membrane, which is operated opposite to the osmosis membrane. That is, the semi-permeable membrane passes water, but does not pass salt. If a high pressure is exerted to the high concentration side, the water passes the semi-permeable membrane and the salt remains, thereby manufacturing fresh-water.

[39] At this time, various bacteria or contaminants contained in the seawater are co mpletely removed by the semi-permeable membrane. However, inorganic materials are not completely removed and thus a tiny amount of inorganic materials pass through the semi-permeable membrane. Therefore, drinking water containing various minerals such as calcium, potassium, and magnesium can be manufactured according to the invention.

[40] FIG. 2 is a cross-sectional view of the reaction dissolving device 5 of the apparatus for manufacturing drinking water, and FIG. 3 shows a plan view of the reaction dissolving device in FIG. 2. The reaction-dissolving device 5 has a cylindrical structure, and is provided with an inlet 31 at one side of the lower portion thereof, through which the treating water is in-flown. In the center of the upper portion of the cylindrical structure is installed an outlet 32 for discharging the treating water. The inside of the cylindrical structure is formed of the outer wall 41, the inner wall and the intermediate wall 43 disposed between the inner and outer walls such that the treating water moves along the wall faces. The intermediate wall 43 is provided with the triangular openings 50 (see FIG. 3) formed at certain intervals in multi-directions in one side of the wall, and the treating water guide plate 51 is projected in the other side of the wall. In the front face thereof provided a guide plate hole 53. The magnetic treating device 20 for magnetizing the treating water is installed in the central space 90 of the reaction dissolving device 5. Here, the guide plate hole 52 is formed on the intermediate wall 43 to face the flow of the treating water so as to introduce the ozone- treated seawater, which is supplied through the inlet 31.

[41] The upper end portion of the inner wall 42 and the intermediate wall 43 is positioned spaced apart from and below the top of the reaction dissolving device 5, such that the treating water in-flown through the lower portion of the device 5 can be moved upwardly along the space formed between the outer and inner walls 42, 41 with the intermediate wall 43 in-between, and then transferred into the central space 100 inside the reaction dissolving device 5 The magnetic treating device 20 is disposed in the center of the central space 100 in the reaction-dissolving device 5. The magnetic treating device 20 is formed of a cylindrical pipe 60 made of stainless steel. The magnetic treating device 20 comprises an inlet hole 70 at the lower portion thereof, through which the treating water is in-flown. The magnetic treating device 20 includes, in the inside thereof, the diffuser 80 for diffusing the in-flown treating water and the permanent magnet 90 for magnetizing the treating water.

[42] The diffuser 80 is formed of sintered micro-balls made of stainless steel and having a size of 3 ?m. The permanent magnet 90 includes a plurality of rod magnets arranged in such a manner that the N-pole and S-pole of the rod magnets face each other. When the permanent magnet 90 exhibits a magnetic force of 5,000 to 7,000 gauss, it can aggregates most effectively the inorganic and organic colloid-forming materials. [43] The treating water is in-flown inside the reaction dissolving device 5 through the inlet 31 installed in the lower end thereof. Inside the reaction dissolving device 5, the treating water moves upwardly along the space between the outer wall 41 and the inner wall 42 while swirling about the intermediate wall 43 of cylindrical shape as in the cyclone. At this time, the treating water is collided with the treating water guide plate 51 through the triangular opening 50 projected from the intermediate wall 43 and the guide plate hole 52, while passing the space between the outer wall 41 and the inner wall 42.

[44] Inside the reaction dissolving device 5, the treating water is swirled and moved upwardly along the both spaces between the outer wall 41 and the inner wall 42 with the intermediate wall 43 therebetween. At this time, the treating water changes the direction of flow while colliding against the treating water guide plate when it passes through the triangular opening 50 and the guide plate hole 52. The triangular opening 50 and the guide plate hole 52 are formed in zigzags in the intermediate wall from the lower portion to the upper portion thereof. Therefore, due to the reducing action of the ozone dissolved in the treating water, various soluble inorganic and organic materials are oxidized into inorganic and organic colloid-forming materials, simultaneously while the bacteria are sterilized.

[45] FIG. 4 is a cross-sectional view of the magnetic treating device installed inside the reaction-dissolving device of the apparatus for manufacturing drinking water.

[46] FIG. 5 is a plan view of the intermediate wall installed in the reaction dissolving device of the apparatus for manufacturing drinking water, FIG. 6 is a side view of the intermediate wall in FIG. 5, and FIG. 7 is a cross-sectional view of the intermediate wall in FIG. 5.

[47] The triangular opening 50 and the guide plate hole 52, which are formed in zigzags in the intermediate wall 43 at certain intervals from the lower portion to the upper portion thereof, are constructed in such a manner that one side of the wall face is formed of a triangular structure in order for the treating water to be in-flown, and the other side of the wall face is formed of the treating water guide plate 51 installed slantedly along the wall face of the intermediate wall 43 so that the treating water passed through the triangular opening 50 can change its flow path. Also, one end face of the treating water guide plate 51 includes a guide plate hole 52 opened such that the treating water can be passed therethrough.

[48] The major minerals in the treated water manufactured according to the invention are summarized in the table 1. [49] Table 1 (Unit: mg/liter)

[50] The test result in the table 1 is in accordance with Section 3 of the regulations regarding the quality requirements and the test standards for drinking water by the Department of Environment. It has been found from the table that major minerals such as Na, Ca, Mg, and K are contained in great quantities.

[51] While the present invention has been described with reference to the particular illustrative embodiments, it is not to be restricted by the embodiments but only by the appended claims. It is to be appreciated that those sterilized in the art can change or modify the embodiments without departing from the scope and spirit of the present invention. Industrial Applicability

[52] As described above, according to the invention, the apparatus for and a method of manufacturing drinking water using seawater, in which a reverse osmosis treatment is carried out after an ozone and magnetization treatment, is provided. In the apparatus and method of the invention, various soluble inorganic and organic materials contained in the seawater can be removed, along with sterilization of bacteria contained therein, by means of the ozone and magnetization treatment without necessity of additional aggregating agent. In particular, a reaction dissolving device is provided with an intermediate wall having a plurality of triangular openings formed therein at certain intervals so that the solubility ozone into the seawater can be increased adequately so as to oxidize various contaminants such as soluble inorganic and organic materials contained in the seawater, and the oxidized contaminants can be removed through a filtering device, thereby eliminating the necessity of separate secondary ozone treatment and thus simplifying the manufacturing facility and process.

Claims

[1] An apparatus for manufacturing drinking water using seawater where a reverse osmosis treatment is performed after an ozone and magnetizing treatment, the apparatus comprising: a) a seawater storage tank 1 for storing seawater taken from a bottom of neighboring seawaters; b) an ozone generator 2 for generating ozone; c) a turbulent turbine pump 3 for mixing, dissolving, and transferring the ozone generated in the ozone generator 2 and the seawater stored in the seawater storage tank 1 ; d) an ejector 4 for spraying with high-pressure the seawater transferred from the turbulent turbine pump 3; e) a reaction dissolving device 5 for magnetizing the ozone-treated seawater through the turbulent turbine pump 3 and the ejector 4 by exerting a magnetic force to the ozone-treated seawater, the reaction dissolving device 5 having a built-in magnetic treating device 20; f) a multi-layered filter 6, an active carbon filter 7, and a precision filter 10 for removing contaminant from the seawater magnetized through the reaction dissolving device 5; and g) a reverse osmosis membrane filter 12 for removing salt contents from the seawater filtered through the precision filter 10 to thereby obtain fresh- water; h) wherein the reaction dissolving device 5 is of a cylindrical shape with its top and bottom closed and comprises: i) an outer wall 41 having an inlet 31 connected to the circumference of the lower portion thereof for supplying the ozone-treated seawater from the ejector 4 to the reaction dissolving device 5 therethrough and an outlet 32 connected to the upper portion thereof; ii) an inner wall 42 disposed spaced apart from the outer wall 41, the lower end of the inner wall 42 being in tight contact with the lower portion of the outer wall 41, and the upper end of the inner wall 42 being disposed spaced apart from the upper portion of the outer wall 41 ; and iii) an intermediate wall 43 rotatably positioned between the outer wall 41 and the inner wall 42 and having a plurality of treating water guide plates 51 protruded therefrom towards the outer wall 41, such that the ozone-treated seawater from the ejector 4 is transferred to the magnetic treating device 20 in the form of turbulent flow by means of the intermediate wall 43 rotated by the flow of the seawater. [2] An apparatus according to claim 1, wherein the intermediate wall 43 has a triangular opening 50 formed therein at the lower portion of the treating water guide plate 51, and each of the treating water guide plates 51 has a guide plate hole 52 formed facing the flow of the ozone-treated seawater such that the seawater supplied through the inlet 31 can be entered. [3] An apparatus according to claim 2, wherein the treating water guide plates 51 are formed upwardly from the lower portion of the intermediate wall 43, which corresponds to the position of the inlet 31, in such a way as to be formed in zigzags along the circumferential direction thereof. [4] An apparatus according to claim 1, wherein the magnetic treating device 20 has an inlet hole 70 formed at the lower portion thereof through which the treating water is in-flown, and includes a diffuser 80 for diffusing the in-flown treating water and a permanent magnet 90 for magnetizing the treating water. [5] An apparatus according to claim 4, wherein the diffuser 80 is formed of sintered filter of micro-particles, the micro-particles being made of stainless steel and having a size of 3 ?m. [6] An apparatus according to claim 4, wherein the permanent magnet 90 includes a plurality of rod magnets arranged in such a manner that the N-pole and S-pole of the rod magnets face each other. [7] An apparatus according to claim 1, wherein the milti-layered filter 6 includes an anthracite layer, a sand layer, and a gravel layer in the enumerated order from the top to the bottom. [8] A method of manufacturing drinking water using seawater where a reverse osmosis treatment is performed after an ozone and magnetizing treatment using an apparatus according to any one of claims 1 to 7, the method comprising steps of: a) mixing seawater with ozone generated by an ozone generator 2 using a turbulent turbine pump 3 and an ejector 4; b) magnetizing the seawater mixed with ozone by exerting a magnetic force of 5,000-7,000 gauss thereto in a reaction dissolving device 5, which includes a magnetic treating device installed therein; c) filtering the magnetized seawater through a multi-layered filter 6, an active carbon filter 7, and a precision filter 10 to thereby remove contaminants from the magnetized seawater; and d) treating the filtered seawater using a reverse osmosis membrane filter 12, to thereby produce drinking water.