KR101977787B1 - Filtering Apparatus Containing Floating Media and Filtering Method - Google Patents

Abstract

The present invention relates to a seawater pretreatment apparatus located in an introduction unit of a seawater desalination apparatus including a micro-filtration (MF) of ultra-filtration (UF) module and a reverse osmosis membrane module, and a method for performing a seawater desalination process more economically and efficiently using such a pretreatment unit. More specifically, the present invention is to provide a seawater desalination apparatus with enhanced desalination performance by effectively decomposing and removing organic/inorganic impurities contained in seawater while minimizing the use of chemical flocculant in the pretreatment unit by adding a plasma module to a flotation type filtration device which is a pretreatment device of the seawater desalination apparatus, and a filtration method.

Description

Seawater desalination apparatus including plasma pretreatment module and seawater desalination method using same {Filtering Apparatus Containing Floating Media and Filtering Method}

The present invention is more economical by using a seawater pretreatment device located in the introduction of the seawater desalination apparatus including a MF (Micro-filtration) or ultra-filtration (UF) module and a reverse osmosis membrane module and such a pretreatment device. More specifically, the present invention relates to a method of effectively conducting a seawater desalination process, and more specifically, by adding a plasma module to a flotation filtration device which is a seawater pretreatment device of a seawater desalination process, while minimizing the use of chemical flocculant in the pretreatment step, It is to provide a seawater desalination apparatus and a seawater desalination method with improved desalination performance and efficiency by effectively decomposing / removing organic / inorganic impurities.

Water shortages are expanding due to the increase in population, increasing demand for water due to improved living standards, and the regional bias of rainfall due to extreme weather, and about 40% of the world's population suffers from drinking water shortage. Water shortages are expected to increase due to pollution of surface and ground water.

Therefore, various methods for desalination of seawater have been developed, such as evaporation using a heat source, forward osmosis and reverse osmosis using osmosis, as well as electrodialysis, crystallization, ion exchange membrane, solvent extraction, and pressure adsorption. have.

Among the evaporation methods, Multi-Stage Flash (MSF), Multi-Effect Distillation (MED), Reverse Osmosis (Reverse Osmosis), etc. are representatively applied to desalination of seawater. In order to improve efficiency, various methods for removing impurities such as suspended substances in seawater flowing into the front end of the seawater desalination process have been attempted.

Suspended Solids (SS) generally refers to small particles of 0.1 μm or more contained in water, and when contained in water, it causes severe turbidity and increases BOD and COD. Sewage, which contains a lot of suspended solids, is a contaminant that must be removed because it can accumulate in the pipeline, obstruct the flow of water, and the deposited organic matter can decay.

On the other hand, the suspended solids are classified as a particle size is slightly larger than the colloidal components and, in contrast to the dissolved substances, are suspended in water. The suspended matter component is precipitated to some extent after a certain period of time, but the sedimentation rate is very low due to the small particle size. Therefore, in order to remove the suspended solids contained in the water, flocculation agents are used to agglomerate large particles to form flocs. Flotation tanks can be used, either by means of sedimentation or flotation, to remove traces of suspended solids by means of filter media.

In this flotation tank, it is common to use a chemical flocculant such as NaOCl, an acid such as sulfuric acid, or FeCl 3 to accelerate flocculation of suspended solids contained in the treated water. Since the coagulant components must be removed, there is a problem that the process cost increases.

Registered Patent No. 1156125 (2012.06.07 registration)

In the present invention, in the desalination of seawater containing suspended substances such as organic matter, a plasma flocculant is added to a flotation tank of a flotation type filtration device used as a pretreatment device before being introduced into a membrane separation process to produce fresh water. It is an object of the present invention to provide an apparatus and method for desalination of seawater more economically by efficiently removing suspended solids without using it.

Seawater desalination apparatus according to an embodiment of the present invention, floating type filtration device is introduced into the sea water; And a membrane separation device for desalination of the treated water discharged from the floating filter device, wherein the floating filter device includes a mixed agglomeration tank 100 for agglomeration of foreign matter in seawater to form and grow flocs. ); It includes; floating flotation tank 300 for injecting and removing the floc contained in the treated water passing through the mixed flocculation tank by injecting micro-bubbles, the plasma electrode module 50 in the lower portion of the mixed flocculation tank 100 It is characterized by being located.

The mixing coagulation tank 100 preferably includes a measurement unit 210 for measuring the concentration of suspended solids or organic matter contained in seawater, and controls the operation of the plasma electrode module according to the measurement result of the measurement unit. It is preferable to further include a control unit 220.

The membrane separation module according to the present invention, the microfiltration or ultrafiltration membrane module 400 and the reverse osmosis membrane module 500 is connected in series, the plasma electrode module 50, a plurality of holes formed tungsten substrate; A ceramic layer surrounding the outer circumferential portion of the tungsten base except for the hole; And a plasma electrode positioned inside the hole and having a multi-stage structure in which a ground part 33 having a circumferential shape, a fixing part 32, and a discharge part 31 are sequentially stacked. The ground part 33 Is in contact with the tungsten substrate and generates plasma in the discharge section 31.

The ground portion 33, the fixing portion 32 and the discharge portion 31 is preferably an integral structure made of the same material having corrosion resistance, and the ground portion 33, the fixing portion 32 and the discharge portion The ratio of the diameter of (31) is 7-8: 4-6: 1, and it is more preferable that the ratio of height is 1-2-2: 1: 1.

The integral structure of the plasma electrode is preferably made of SUS material having corrosion resistance, and the tungsten base may be applied as a plasma electrode module to a mixing tank or agglomeration tank in a plate or columnar form.

Another embodiment of the present invention includes a desalination method of seawater, comprising: pretreating the seawater using the flotation filtration device 200; And desalination of the treated water discharged from the floating filter using a membrane separation device. The pretreatment may include: in the plasma electrode module 50 positioned below the mixing flocculation tank 100. Forming a plasma; Agglomeration of foreign matter in the seawater in the mixed agglomeration tank 100 of the flotation filter 200 to form and grow flocs (floc); And floating and removing flocs included in the treated water passing through the mixed agglomeration tank 100 through the microbubbles injected from the flotation removing tank 300.

Forming a plasma in the plasma electrode module 50, by measuring the concentration of the suspended solids or organic material contained in the seawater flowing into the mixing agglomeration tank 100, and the operation of the plasma electrode module according to the measurement result Preferably, the step of desalination using the membrane separation device is preferably performed by the water treatment by the microfiltration or ultrafiltration membrane module 400 and the water treatment by the reverse osmosis membrane module 500.

The plasma electrode module 50 may include a tungsten base having a plurality of holes formed therein; A ceramic layer surrounding the outer circumference of the tungsten base except for the hole; And a plasma electrode positioned inside the hole and having a multi-stage structure in which a circumferential ground portion 33, a fixing portion 32, and a discharge portion 31, each having a different diameter, are sequentially stacked.

The ground portion 33 is in contact with a tungsten substrate and generates plasma in the discharge portion 31, and the ground portion 33, the fixing portion 32, and the discharge portion 31 are made of SUS material having corrosion resistance. It is preferable that it is an integral structure consisting of.

The ratio of the diameters of the ground portion 33, the fixing portion 32, and the discharge portion 31 is 7 to 8: 4 to 6: 1, and the height ratio is more preferably 1 to 2: 1: 1. .

According to the present invention, it is possible to effectively decompose or remove organic substances and microorganisms present in the seawater by using plasma underwater discharge in the pretreatment process through the flotation filtration device in the desalination of seawater.

In particular, a plasma pretreatment module including a three-stage integrated plasma nozzle provided at the lower end of the mixing coagulation tank constituting the flotation type filtration device, which is a pretreatment device for seawater, is provided to stably generate plasma in the mixing coagulation tank. It is possible to effectively remove and decompose organic substances in seawater without using a chemical flocculant, thereby improving the pretreatment efficiency of the seawater desalination process.

In addition, the plasma electrode for water treatment included in the plasma electrode module according to the exemplary embodiment of the present invention may have a discharge part, a fixing part, and a ground part integrally manufactured, and thus may have excellent durability and stably generate plasma. It is applied in the form of an electrode module provided with an electrode, it is possible to prevent the phenomenon of breaking by being applied to more than one electric power required to one electrode, or breakdown of the local site.

In addition, the three-stage configuration with different lengths and diameters not only improves grounding efficiency and discharge efficiency, but also generates a large amount of OH radicals through stable plasma generation, thereby effectively decomposing organic pollutants contained in seawater. .

Such effects of the present invention are not limited to the above-mentioned effects, and other effects not mentioned will be clearly understood by those skilled in the art from the following description.

1 is a view schematically showing a seawater desalination apparatus according to an embodiment of the present invention.
2 is a view schematically showing a plasma electrode module according to an embodiment of the present invention.
3 is a view for explaining the principle and effect of plasma generation.
4 is a view schematically showing a plasma nozzle according to an embodiment of the present invention.
Figure 5 is a view showing the form of a plasma electrode module that can be used in the present invention by way of example.

Hereinafter, with reference to the embodiments and the drawings of the present invention will be described in detail. These examples are only presented by way of example only to more specifically describe the present invention, it will be apparent to those skilled in the art that the scope of the present invention is not limited by these examples.

Also, unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, and in case of conflict, the present specification, including definitions The description of the specification will prevail.

In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and like reference numerals designate like parts throughout the specification. In addition, when a part "contains" a certain component, this means that the component may further include other components, without excluding other components, unless specifically stated otherwise. In addition, the "unit" described in the specification means one unit or block that performs a specific function.

In each step, an identification code (first, second, etc.) is used for convenience of description, and the identification code does not describe the order of each step, and each step does not explicitly describe a specific order in context. It may be carried out in a different order than described above. That is, each step may be performed in the same order as specified, may be performed substantially simultaneously, or may be performed in the reverse order.

Figure 1 schematically shows a seawater desalination apparatus according to an embodiment of the present invention. As shown in FIG. 1, the seawater desalination apparatus according to an embodiment of the present invention is pre-treated by the floating type filtration device 200 and the floating type filtration device 200, which is a seawater pretreatment device for pretreating seawater. It may be composed of a membrane separation device for desalination of the treated water.

The membrane separation device is a microfiltration (MF) or ultrafiltration (UF) membrane module 400 and the reverse osmosis membrane module 500 used in the conventional desalination process of the seawater is connected in series, the final desalination of seawater is to be performed Can be.

Referring to the floating type filtration device 200 according to an embodiment of the present invention in more detail, a mixed agglomeration tank 100 for agglomeration of foreign matter contained in the introduced seawater to form and grow flocs; And a flotation removal tank 300 for injecting and removing flocs contained in the treated water passing through the mixing flocculation tank by injecting micro-bubbles, and the flotation removal tank 300 includes the flocculation flocculation tank 100. An air injection unit 351 for floating the floc included in the treated water that has passed; A removal unit 310 for removing the floe floating through the air injection unit; And a filtration unit 330 provided in a lower region of the floating elimination tank and filtering foreign matter remaining in the treated water from which the floating material is removed through the removal unit.

The mixed agglomeration tank 100 and the floating elimination tank 300 are partitioned from each other via a partition wall, and communicate with each other through the upper and / or lower portions of the partition wall, and the raw water moves along the partition wall. Foreign matter contained within can be removed.

Plasma electrode module 50, which will be described later, is located at the lower end of the mixing agglomeration tank 100, and the mixing inductor 151 is filled in the inlet 150 into which the seawater flows, if necessary, in the flow of raw water passing through the space. By giving resistance, it generates collision, vortex, and turbulence to give frequent change of the flow trajectory of the raw water, so that fine particles contained in raw water come into contact with each other by turbulent flow without turbulence and aggregate to a certain size to form flocs. And the formed flocs can be grown through an agitator.

In detail, a mixed derivative 151 provided in a space into which seawater to be pretreated is filled, and foreign substances included in the seawater by vortices or turbulence generated through the mixed derivative 151 while the raw water is introduced. The circulation may form a floc while the fine particles or organic substances contained in the sea water come into contact with each other.

The miscible derivative 151 is a mesh-type material or a plurality of fiber bundles filled, preferably, a mesh-type material is stacked in multiple layers, or a plurality of fiber bundles are entangled with each other. It may be in the form.

More preferably, the holes may be asymmetrically stacked so that the holes do not coincide in the vertical direction between the mesh-type material in which the holes are formed and the adjacent mesh-type material, and the holes between the mesh-type materials are stacked asymmetrically in the vertical direction. Gravity can cause vortex and / or turbulence as the raw water passes through the mesh-type material, and increases the amount of floc produced as the contact area between the raw water and the flocculant is increased and the amount of floc generated is reduced. By floating the floc at 300, the removal efficiency of foreign matter contained in the raw water can be significantly increased.

In addition, by controlling the strength of turbulence and / or vortex generated according to the size of the mesh hole to be filled, it is possible to appropriately adjust the desired flow rate according to the state of the raw water flowing into the dissolved air floating water treatment apparatus of the present invention. For example, when the content of foreign matter in the raw water is low, the contact area between the flocculant and the raw water is reduced by increasing the size of the mesh hole and reducing the number of laminated mesh materials, and when the content of the foreign matter in the raw water is high, Conversely, by increasing the contact area and time between the flocculant and the raw water, the amount and size of the flocs produced can be properly controlled.

Raw water in which the floc is formed due to turbulence and / or vortex generated through the miscible inductor 151 may grow the floc formed through the stirrer which is a mechanical mixing device.

By injecting microbubbles to remove the flocs contained in the treated water passing through the mixed flocculation tank 100, the flotation flotation tank 300 which floats and removes the flocs passes through the mixed flocculation tank 100. It is provided in the air injection unit 351 for floating the floc contained in the treated water, the removal unit 310 for removing the floe injured through the air injection unit 351 and the lower region of the floating removal tank, The filter unit 330 may further filter the foreign matter remaining in the treated water from which the floc is removed through the removal unit 310.

More specifically, the microbubbles provided from the first air inlet 351 to float the floc formed through the mixing agglomeration tank 100 in the region corresponding to the compartment of the front end of the removal unit adhere to the floc. Floating to the upper portion of the removal unit 310, and removes the injured floc through the skimmer in the removal unit may be discharged to the outside.

In the mixing flocculation tank 100, although a chemical flocculant was conventionally used to make the formation of flocs easier, such a chemical flocculant must be removed during the subsequent membrane separation process, thus causing unnecessary additional process costs. .

Accordingly, in the present invention, the plasma electrode module 50 is provided on the lower surface of the mixing coagulation tank 100 without adding an additional chemical coagulant to the mixing coagulation tank 100, and the plasma electrode included in the plasma electrode module 50 is provided. (30) is used to decompose or remove organic matter and microorganisms present in the seawater which is to be treated by plasma underwater discharge. The organic or microorganisms thus decomposed or removed may play a role of agglutinating nucleus in the mixed agglomeration tank 100, and thus, an additional chemical flocculant administration process may be omitted.

In addition, in the past, chlorine was injected before pretreatment of water to be treated such as seawater to suppress bio-fouling formed by organic materials. The present invention has the advantage that by replacing the chlorine injection method with a plasma method effectively removes organic matter and microorganisms, while suppressing the bio-fouling phenomenon and the like does not cause corrosion problems.

3 is a view for explaining the principle and effect of the plasma generation, before explaining the present invention in detail, will be described with respect to the effect of the water treatment using the plasma underwater discharge with reference to FIG.

In the plasma underwater discharge, corona discharge, arc discharge, or the like can be used by varying pulses, voltages, and the like applied to the plasma electrode. The effects obtained through water treatment using plasma may include cell destruction by shock waves, cell destruction by ultrasonic waves, and cell destruction by high voltage electric fields, which will be described in more detail as follows.

First, in cell destruction by shock waves, shock waves appearing as sudden pressure fluctuations can lead to cell destruction. At this time, the destruction of the cell depends on the size of the cell and the shape of the cell, the thickness of the cell and the like, and depends on the shock wave intensity.

In addition, there is a cell destruction by ultrasonic waves, which can cause cavitation (Cavitation) phenomenon while passing through the liquid. Cavitation is a bubble (bubble) in which the density of liquid is small and dense by creating a longitudinal wave that vibrates by the vibrator when ultrasonic waves pass through the liquid medium by the ultrasonic vibrator. It is a phenomenon that explodes. It is a method used when destroying a cell using a shock wave caused by the explosion and destroying a small amount of microbial cells.

In addition, cell destruction by a high voltage electric field induces a high potential difference in the cell membrane to destroy an insulator called a cell membrane. Therefore, the survival rate of plankton and bacteria can be drastically reduced by the action of ultraviolet rays, active species, shock waves, bubbles, etc. generated by plasma treatment.

In one embodiment, the plasma electrode 30 may be manufactured using tungsten or stainless steel, and may be connected to a power supply (not shown).

The power supply unit may apply a pulse, alternating current, or direct current voltage to the plasma electrode 30. The plasma electrode 30 may be provided at one side of the reactor 10, but may be formed separately, but may be positioned inside the mixing coagulation bath 100 in the form of a plasma electrode module 50 in which a plurality of plasma electrodes are collected. The ground electrode 20 and the plasma electrode 30 may be disposed to face each other (see FIG. 2). In addition, the plasma electrode module 50 may be installed in plural in the reactor according to the throughput of the water to be treated, and may be installed on the side of the mixing coagulation tank 100 as well as the inner bottom.

4 is a diagram schematically illustrating a plasma electrode 30 according to an example. Referring to FIG. 4, the plasma electrode 30 will be described in detail. The plasma electrode 30 may be formed in an integrated structure including a discharge part 31, a fixing part 32, and a ground part 33. . Since it is manufactured integrally, it is possible to prevent the phenomenon of breaking by applying more power than one electrode end, it is possible to improve the durability, there is an advantage that it is easy to replace the plasma electrode 30 later.

In addition, the electrode of each stage is not particularly limited, and may be manufactured in various shapes, but in order to stably generate a plasma, it is preferable that the electrode is formed, and the diameter of the discharge part 31 positioned on the uppermost is shortest. It is preferable that the diameter of the grounding part 33 positioned at the bottom is the longest (see FIG. 4). By decreasing the diameter toward the top, the insulation efficiency and the discharge efficiency of the plasma electrode 30 can be improved. In order to maximize the insulation efficiency and the discharge efficiency of the plasma electrode 30, the ratio of the diameter d of the discharge part 31, the fixing part 32, and the ground part 33 is 1 to 2: 8 to 10: 12 to It is preferable that it is 16, and it is preferable that ratio of the height h of the discharge part 31, the fixing part 32, and the ground part 33 is 1: 1: 1-2.

The plasma electrode may be installed separately in the reactor for water treatment, but may be installed in the reactor in the form of an electrode module in which a plurality of electrodes are disposed.

In an embodiment of the plasma electrode module 50, the plate shape of FIG. 5 (a) and the tube shape of FIG. 5 (b) are shown. The conductive base 52 and the holes in which a plurality of holes 51 are formed are provided. It may be composed of a ceramic layer 53 surrounding the outer periphery of the tungsten substrate.

Inside the hole, the above-described plasma electrode is located, the plasma electrode having a multi-stage structure in which the ground portion 33, the fixing portion 32 and the discharge portion 31 having a circumferential shape are sequentially stacked; The ground portion 33 is in contact with the conductive substrate, and plasma is generated in the discharge portion 31.

According to the shape of the conductive substrate may be implemented as a plate-shaped plasma electrode module and a tube-shaped plasma electrode module, it can be selectively used according to the shape of the water treatment reactor.

As the conductive substrate, tungsten alloy material such as tungsten or tungsten nitride having high electrical conductivity and excellent durability may be used. The plasma electrode included in the plasma electrode module may include a ground part 33 and a fixing part 32. And the discharge portion 31 is preferably an integral structure made of the same material having corrosion resistance, the material having corrosion resistance while forming the integral structure is more preferably made of SUS material.

The ratio of the diameters of the ground portion 33, the fixing portion 32, and the discharge portion 31 of the plasma electrode is preferably 12 to 16: 8 to 10: 1 to 2, and the ground portion 33 and the fixing portion are It is preferable that ratio of the height of the 32 and the discharge part 31 is 1-2: 1: 1.

The conductive substrate may be in the form of a plate or cylinder, and tungsten material is preferably used.

Next, a seawater desalination method including a plasma pretreatment process according to another embodiment of the present invention will be described.

As described above, the seawater desalination method according to the present invention may be divided into a seawater pretreatment process and a desalination process using a membrane separation module. More specifically, the seawater pretreatment using the flotation filtration device 200 is performed. Doing; And desalination of the treated water discharged from the flotation filtration device 200 using a membrane separation device.

The pretreatment of the seawater may include forming a plasma in the plasma electrode module 50 located below the mixing agglomeration tank 100 constituting the floating filter device 200; Agglomeration of foreign substances in seawater in the mixed flocculation tank 100 of the flotation type filtration apparatus to form and grow flocs; And floating and removing the floc included in the treated water passing through the mixed agglomeration tank 100 through the microbubble injected from the flotation removal tank 300.

In the forming of the plasma in the plasma electrode module 50, the concentration of the suspended substances or organic substances in the seawater flowing into the mixed agglomeration tank 100 is measured, and the operation of the plasma electrode module is performed according to the measurement result. If the concentration of impurities in the seawater is low enough to be sufficiently aggregated and removed only by the mixed inductor 151 formed in the seawater inlet described above, the plasma electrode module is not operated and the water quality of the seawater is not good ( For example, when more than a certain level of BOD, COD or SS value is detected) If additional aggregation and removal is required, the control unit can control the operation of the plasma electrode module, plasma intensity, and operation time.

Since the description of the specific plasma module has already been described above, the description thereof will be omitted here, and it is noted that the electrode forming the plasma is preferably an integral structure made of SUS material having corrosion resistance since the seawater is pretreated.

EXAMPLE

In order to confirm the discharge characteristics according to the diameter of the discharge portion of the repair electrode plasma electrode according to an embodiment, the degree of generation of ozone (O3) by using the plasma electrode formed in the circumferential form of the ground portion, the fixed portion and the discharge portion It was.

After maintaining the lengths of the ground part, the fixing part, and the discharge part at 16 mm, 11 mm, and 11 mm, respectively, the concentration of ozone generated by applying current while changing the diameter of the discharge part in various ranges was measured. Ozone is generated by the plasma generated at the discharge end of the electrode, and this ozone has an important effect on the decomposition of contaminants such as reduction of TOC during plasma water treatment.

The diameter of the discharge portion was varied in the range of 1 to 4 mm, and the ratio of the diameters of the ground portion 33, the fixing portion 32 and the discharge portion 31 was kept constant at 7.5: 5: 1, and the same voltage The result of measuring the concentration of ozone produced by adding is shown in the table below.

Diameter of discharge part [mm] One 2 3 4 Generated O3 Concentration [ppm] - 0.06 0.07 0.0001

As shown in the results of Table 1, when the diameter of the discharge portion is too low, it can be seen that the generation of ozone is insignificant because the plasma is not formed properly, and when the diameter is too large, uniformly on the surface of the discharge portion It was confirmed that the amount of ozone generated as a whole was reduced because no plasma was generated.

In the present specification, only a few examples of various embodiments performed by the present inventors are described, but the technical idea of the present invention is not limited thereto, but may be variously modified and implemented by those skilled in the art.

20: ground electrode 30: plasma electrode
31: discharge part 32: fixed part
33: ground portion 50: plasma electrode module
100: miscible agglomeration tank 151: miscible derivative
200: floating filter 210: measuring unit
220: control unit 300: injury removal tank
310: removal unit 330: filtration unit
331: filter medium 351: air injection unit
400: microfiltration or ultrafiltration membrane module
500: reverse osmosis membrane module

Claims (23)

In the seawater desalination apparatus,
Floating filtration device in which seawater is introduced; And
And a membrane separation device for desalination of the treated water discharged from the floating filter device.
The flotation filtration apparatus includes: a mixed agglomeration tank 100 for agglomeration of foreign matter in seawater to form and grow flocs; Includes; flotation tank 300 for injecting and removing the floc contained in the treated water passing through the mixing flocculation tank by injecting micro-bubbles;
Plasma electrode module is located below the mixing coagulation tank 100,
The plasma electrode module may include a tungsten base having a plurality of holes formed therein; A ceramic layer surrounding the outer circumference of the tungsten base except for the hole; And a plasma electrode positioned inside the hole and having a multi-stage structure in which a ground part 33 having a circumferential shape, a fixing part 32, and a discharge part 31 are sequentially stacked.
The ground portion 33 is in contact with the tungsten substrate, characterized in that the plasma is generated in the discharge portion 31, seawater desalination apparatus comprising a plasma pretreatment module. The method of claim 1,
The mixing coagulation tank 100 includes a measuring unit for measuring the concentration of suspended solids or organic matter contained in seawater, seawater desalination apparatus comprising a plasma pretreatment module. The method of claim 2,
The seawater desalination device further comprising a control unit for controlling the operation of the plasma electrode module according to the measurement result of the measuring unit. The method of claim 1, wherein the membrane separation device,
A seawater desalination device comprising a plasma pretreatment module in which a microfiltration or ultrafiltration membrane module and a reverse osmosis membrane module are connected in series. delete The method of claim 1,
The ground portion 33, the fixing portion 32 and the discharge portion 31 is a seawater desalination apparatus including a plasma pretreatment module, which is an integral structure made of the same material having corrosion resistance. The method of claim 1,
The ratio of the diameters of the ground part 33, the fixing part 32 and the discharge part 31 is 12 ~ 16: 8 ~ 10: 1 ~ 2, seawater desalination apparatus comprising a plasma pretreatment module. The method of claim 1,
The ratio of the height of the ground portion (33), the fixing portion (32) and the discharge portion (31) is 1 ~ 2: 1: 1, seawater desalination apparatus comprising a plasma pretreatment module. The method of claim 6,
The unitary structure is a seawater desalination device comprising a plasma pretreatment module, characterized in that the corrosion-resistant SUS material. The method of claim 1,
The tungsten base material, characterized in that the plate form or columnar form, Seawater desalination apparatus comprising a plasma pretreatment module. The method of claim 1,
The inlet 150 of the floating filtration device to which the seawater is introduced is filled with a miscible derivative 151, thereby resisting the flow of seawater, thereby generating a collision and vortex or turbulent flow, comprising a plasma pretreatment module Seawater desalination device. The method of claim 11,
The mixed derivative 151 is a seawater desalination apparatus including a plasma pretreatment module, characterized in that the mesh (mesh) type material or a plurality of fiber bundles are filled with the form. The method of claim 1,
The floating removal tank 300, the air injection unit 351 for floating the floe contained in the treated water passing through the mixing flocculation tank 100, removes the flocs injured through the air injection unit 351 The filter unit 330 is provided in the removal unit 310 and the lower region of the flotation removal tank, and filters foreign matter remaining in the treated water from which the floc is removed through the removal unit 310. Seawater desalination apparatus comprising a plasma pretreatment module. In the seawater desalination method,
Pretreatment by introducing seawater into the flotation filtration device; And
And desalination of the treated water discharged from the floating filter using a membrane separation device.
The flotation filtration device includes a mixed flocculation tank 100 and a flotation elimination tank 300,
The pretreatment may include: forming a plasma in a plasma electrode module positioned below the mixing coagulation tank (100); Agglomeration of foreign substances in seawater in the mixing agglomeration tank 100 to form and grow flocs; And floating and removing the floc included in the treated water passing through the mixed agglomeration tank 100 through the microbubble injected from the flotation tank 300.
The plasma electrode module may include a tungsten base having a plurality of holes formed therein; A ceramic layer surrounding the outer circumference of the tungsten base except for the hole; And a plasma electrode positioned inside the hole and having a multi-stage structure in which a ground portion 33, a fixing portion 32, and a discharge portion 31, which have a circumferential shape, are sequentially stacked. Seawater desalination method comprising the process. The method of claim 14,
Forming a plasma in the plasma electrode module, measuring the concentration of suspended solids or organic matter contained in the seawater flowing into the mixing agglomeration tank 100, and controlling the operation of the plasma electrode module according to the measurement result Characterized in that the seawater desalination method comprising a plasma pretreatment process. The method of claim 14,
The desalination step is characterized in that the water treatment by the microfiltration (MF) or ultrafiltration (UF) membrane module and the water treatment by the reverse osmosis membrane module is performed in sequence, seawater desalination method comprising a plasma pretreatment process. delete The method of claim 14,
The ground portion (33) is in contact with the tungsten substrate, characterized in that the plasma is generated in the discharge portion (31), seawater desalination method comprising a plasma pretreatment process. The method of claim 14,
The ground portion (33), the fixing portion (32) and the discharge portion (31), characterized in that the integral structure made of SUS material having corrosion resistance, seawater desalination method comprising a plasma pretreatment process. The method of claim 14,
The ratio of the diameters of the ground part 33, the fixing part 32, and the discharge part 31 is 7 to 8: 4 to 6: 1, and the ratio of the height is 1 to 2: 1: 1. Seawater desalination method comprising a. The method of claim 14,
The mixing inductor 151 is filled in the inlet 150 of the floating filtration apparatus into which the seawater is introduced, thereby resisting the flow of the seawater, thereby generating a collision, vortex, or turbulence, including plasma pretreatment. Seawater desalination method. The method of claim 21,
The miscible derivative 151 is a mesh-type material or a plurality of fiber bundles characterized in that the form is filled, seawater desalination method comprising a plasma pretreatment process. The method of claim 14,
The floating removal tank 300, the air injection unit 351 for floating the floe contained in the treated water passing through the mixing flocculation tank 100, removes the flocs injured through the air injection unit 351 The filter unit 330 is provided in the removal unit 310 and the lower region of the flotation removal tank, and filters foreign matter remaining in the treated water from which the floc is removed through the removal unit 310. Seawater desalination method comprising a plasma pretreatment process.

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