KR20170087005A - A system for seawater desalination using water blending - Google Patents

Abstract

A first blending tank for introducing and mixing seawater, nose water, storm water and ground water, a second blending tank for mixing and admitting stormwater and groundwater, a first UF installed to remove contaminants from the treated water discharged from the first blending tank, A second buffer unit installed to remove contaminants from the treated water discharged from the second blending tank, a first buffer tank which receives the treated water discharged from the first UF unit, a second buffer unit which receives the treated water discharged from the second UF unit, A SWCO (Sea Water Reverse Osmosis) unit for desalinizing the treated water discharged from the first buffer tank, a BWRO (Brackish Water Reverse Osmosis) unit for desalinating the treated water discharged from the second buffer tank A storage tank for storing the treated water discharged from each of the SWRO unit and the BWRO unit, a drain water unit for distributing and supplying the treated water in the storage tank to the drainage or use site, and a treatment tank for supplying the treated water discharged from the SWRO to the second buffer tank And a control unit for automatically controlling the water treatment process through the operation of the SWRO unit and the BWRO unit according to the kind of the water, the type of the incoming water, and the water quality of the seawater desalination system.

Description

TECHNICAL FIELD [0001] The present invention relates to a system for seawater desalination using water blending,

The present invention relates to a seawater desalination system for seawater desalination by selectively blending seawater, nose water, stormwater, and groundwater for water blending.

Conventionally, a water treatment facility is constructed and operated according to the substances to be treated and the use of the treated water.

In other words, there is a problem in that it can not achieve a complex effect while making a considerable investment because it builds facilities limited to specific hazardous substances.

Also, in the conventional water treatment facility, all the processes are performed uniformly irrespective of the required quantity of the treatment water corresponding to each process and whether or not the required water quality is met. Therefore, the water treatment process operation is not efficient and unnecessary cost is required. Particularly, since the conventional water treatment technique requires a fixed water treatment process or a manual process to change the process, it is difficult to actively cope with changes in the water quality (turbidity, TDS) of raw water, There is a possibility.

In addition, there is a problem that the demanded quantity is very insufficient in coastal and island areas where water supply is limited due to geographical and geographical conditions.

In addition, when a single type of water in a specific place is treated with water, the cost of the water treatment process increases depending on the degree of contamination, the water treatment process takes a long time, the best water quality is difficult to obtain, and the water quantity is difficult to be secured.

For this purpose, there is a demand for a technique of mixing seawater, storm water and sea water into necessary water, and a device for efficiently mixing seawater, storm water and sea water, that is, water blending treatment is required.

In particular, in the case of islands, desalination is required as the main source of the seawater due to lack of groundwater or stormwater. In case desalination of seawater having a high TDS, the disposal cost is increased. Therefore, it is necessary to develop a facility for water blending treatment of seawater and other raw water so as to lower the TDS of the treated water in the seawater desalination process to reduce the processing cost and increase the water treatment efficiency.

Korean Patent No. 10-1469891

Disclosure of the Invention The present invention has been made in view of the above circumstances and provides a seawater desalination system capable of reducing the TDS of raw water to be treated for water treatment and desalinating multi- There is a purpose.

To achieve the above object, the present invention provides a seawater desalination system using water blending, comprising: a first blending tank for introducing and mixing seawater, nose water, stormwater, and groundwater; A second blending tank for introducing and mixing stormwater and groundwater; A first UF unit installed to remove contaminants from the treated water discharged from the first blending tank; A second UF unit installed to remove contaminants from the treated water discharged from the second blending tank; A first buffer tank for receiving treated water discharged from the first UF unit; A second buffer tank for receiving treated water discharged from the second UF unit; A SWRO (Sea Water Reverse Osmosis) unit for desalinating the treated water discharged from the first buffer tank; A BWRO (Brackish Water Reverse Osmosis) unit for desalinating the treated water discharged from the second buffer tank; A storage tank for storing treated water discharged from each of the SWRO unit and the BWRO unit; A distribution water device for distributing and supplying the treated water in the storage water tank to a drainage or use place; A replenishing line for supplying treated water discharged from the SWRO to the second buffer tank; And a control unit for automatically controlling the water treatment process through the movement of the treated water and the operation of the SWRO unit and the BWRO unit according to the type and quality of the incoming water.

It is preferable that the apparatus further includes a concentrated water supply line for supplying the concentrated water remaining after the treatment in the BWRO to the first buffer tank.

The method may further include a step of generating sodium hypochlorite by using the concentrated water generated in the seawater desalination process in the SWRO unit, supplying the sodium hypochlorite to the drain water supply unit, and disinfecting the treated water.

A first branch path branched to supply the treatment water discharged from the first blending tank to the second UF unit; And a second branch path branched to supply the process water discharged to the second UF unit to the first buffer tank, wherein each of the first and second UF units, the SWRO unit and the BWRO unit are assembled and / It is preferable to be installed in a removable and modular mobile container, selectively connectable and detachable, and capable of position and order exchange arrangement.

According to another aspect of the present invention, there is provided a seawater desalination system using water blending, comprising: a first blending tank for introducing and mixing a water source including raw water including saline; A second blending tank for introducing and mixing the water source not containing the salt; A first UF unit installed to remove contaminants from the treated water discharged from the first blending tank; A second UF unit installed to remove contaminants from the treated water discharged from the second blending tank; A first buffer tank for receiving treated water discharged from the first UF unit; A second buffer tank for receiving treated water discharged from the second UF unit; A SWRO (Sea Water Reverse Osmosis) unit for desalinating the treated water discharged from the first buffer tank; A BWRO (Brackish Water Reverse Osmosis) unit for desalinating the treated water discharged from the second buffer tank; A storage tank for storing treated water discharged from each of the SWRO unit and the BWRO unit; A distribution water device for distributing and supplying the treated water in the storage water tank to a drainage or use place; A replenishing line for supplying treated water discharged from the SWRO to the second buffer tank; And a control unit for automatically controlling the water treatment process through the movement of the treated water and the operation of the SWRO unit and the BWRO unit according to the TDS and turbidity of the inflow source water.

Here, when the TDS of the treated water discharged from the first blending tank is equal to or greater than 25,000 mg / L, the control unit controls the flow of the treated water so as to be water-treated while stepping through the first UF unit, the SWRO unit and the BWRO unit .

When the TDS of the treated water discharged from the first blending tank is in the range of 15,000 mg / L or more and less than 25,000 mg / L, the control unit may move the treated water such that the first UF unit and the BWRO unit are water- It is better to control the operation.

When the TDS of the treated water discharged from the first blending tank is in the range of 400 mg / L or more and less than 15,000 mg / L, the control unit controls the movement and operation of the treated water so as to perform the water treatment stepwise through the first UF unit and the BWRO unit .

In addition, when the TDS of the treated water discharged from the second blending tank is 100 mg / L or less and the turbidity is 0.5 NTU or more, the control unit may move the second UF unit and the BWRO so as to be water- And to control the operation.

In addition, when the TDS of the treated water discharged from the second blending tank is 100 mg / L or less and the turbidity is less than 0.5 NTU, the control unit controls the treatment water discharged from the second blending tank It is preferable to control the movement and operation of the treatment water so as to undergo the carbonation-fixing process.

According to the seawater desalination process using the water blending of the present invention, since concentrated water generated in the BWRO process is interblended and treated in the SWRO process, it is unnecessary to separately treat the concentrated water, thereby reducing the cost, By lowering the TDS of the treated water, it is possible to reduce the desalination operation load, thereby reducing the cost and increasing the production efficiency.

In addition, using hypochlorous acid, which is a disinfectant, is used as a disinfectant by using salt from the SWRO process, it is not necessary to separately prepare or supply purified salt for producing hypochlorous acid, It is possible to securely supply the raw materials for the production.

In addition, the facility can be modularized by each water treatment process and can be easily separated and assembled. Thus, it is possible to cope with the installation environment promptly and actively, and to reduce the cost required for transportation, installation and maintenance.

FIG. 1 is a schematic diagram for explaining a seawater desalination system using water blending according to an embodiment of the present invention.
2 is a front view for explaining a container for module-by-process in a seawater desalination system using water blending according to an embodiment of the present invention.
3 is a left side view of the container shown in Fig.
4 is a right side view of the container shown in Fig.
5 is a diagram for explaining an example in which a process-specific module is assembled and disassembled and used.
6 is a process schematic diagram for explaining the water treatment process of raw water by water quality.
FIG. 7 is a flowchart illustrating an operation method of desalinating sea water using a first blending part according to the quality of raw water.
8 is a flowchart illustrating an operation method of desalination using a second blending part according to the quality of raw water.

Hereinafter, a seawater desalination system using water blending according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 to 8, a water-desalination desalination system using water blending according to an embodiment of the present invention includes a first blending tank 110, a second blending tank 120, a first UF unit 210, The SWRO unit 410, the BWRO unit 420, the storage water tank 510, the water distribution unit 520, the supplementary line 430, the concentrated water supply line 440, (600) and a control unit (700).

The first blending tank 110 is used for water blending the multiple water sources in advance including the inflow source water containing the salt. Specifically, the first blending tank 110 uses the nose water, the storm water, and the ground water as the inflow source, Branding. A pH meter 113, a TDS meter 114, a turbidimeter 115, and a water level meter 115 are provided for each water intake pipe 111 so that the water intake amount of the incoming water flowing into the first blending tank 110 can be measured for each water source. And a flow meter 116 are installed in the first blending tank 110. A gauge for measuring the quantity of inflow water flowing into the first blending tank 110 and being water-blended is installed. An inline blending unit 118 is installed in the inflow pipe 117 that collects a plurality of intake pipes 111 and connects to the first blending tank 110. The inline blending unit 118 is configured to pre- . The inline blending portion 118 is provided in the inflow pipe 117 so that the blending time in the first blending bath 110 is set to a predetermined value by preliminarily blending the inflow pipe 117 with the inflow pressure before entering the first blending bath 110 And the processing cost can be reduced.

The second blending tank 120 is for introducing the influent raw water not containing the salt and performing water blending. More specifically, the second blending tank 120 is for introducing the excellent and ground water to perform water blending. The raw water is taken in through the water intake pipe 121 for receiving the ground water, and the raw water is introduced into the second blending tank 120 while being mixed in the inflow pipe 127. A thermometer 112, a pH meter 113, a TDS meter 114, a turbidimeter 115 and a flow meter 116 are installed in each of the water intake pipes 121, and a water level meter is installed in the second blending tank 120 . The inlet pipe 127 may be provided with an in-line blending part 128 to supply the blended water to the second blending bath 120 beforehand.

Also, an agitator is installed in each of the first and second blending baths 110 and 120.

The first UF unit 210 is for removing particulate pollutants (suspended substances, proteins, polysaccharide polymers, etc.) contained in the treated water discharged from the first blending tank 110, and includes a submerged ultrafiltration membrane UF) may be provided in the UF housing. The UF housing is equipped with a water gauge to measure the flow rate. A pH meter 212, a TDS meter 213, a turbidimeter 214 and a flow meter 215 are installed in the inflow pipe 211 to measure the quantity and quality of inflow water flowing into the first UF unit 210.

The second UF unit 220 also has the same configuration as the first UF unit 210. The particulate pollutants (suspended substances, proteins, polysaccharide polymers, etc.) included in the treated water discharged from the second blending tank 120, . A pH meter 222, a TDS meter 223, a turbidimeter 224, and a flow meter 225 are installed in the inflow pipe 221 to measure the quantity and quality of inflow water flowing into the second UF unit 220. Of course, a water level meter is also installed in the UF housing of the second UF unit 220.

In order to supply and process the process water discharged from the first blending tank 110 from the second UF unit 220, the inflow pipe 211 on the side of the first UF unit 210 and the side of the second UF unit 220 A distribution pipe 230 connecting the inflow pipe 221 may be further installed. Therefore, when the load is concentrated on the first UF unit 210 or the processing capacity is exceeded, the raw water can be efficiently treated by supplying it to the distribution pipe 230.

And a return pipe 240 connecting the inflow pipe 321 connected to the second buffer tank 320 from the second UF unit 220 and the inflow pipe 411 of the first buffer tank 310 is installed. Therefore, the treated water containing seawater can be distributed to the second UF unit 220, filtered, and then supplied to the first buffer tank 310 through the recovery pipe 240.

The first buffer tank 310 is provided with an agitator for mixing the filtered treatment water after being blended in the first blending tank 110 and storing the filtered treatment water. In the first buffer tank 310, the concentrated water that has been desalinated by the BWRO unit 420 is supplied through the concentrated water supply line 440 and is blended in the first blending tank 110, Can be mixed. A concentrated water supply line 440 for connecting the BWRO unit 420 and the first buffer tank 310 is provided and the concentrated water having a lower TDS than the seawater can be supplied to the first buffer tank 310. Therefore, the processing load in the process of mixing in the first buffer tank 310 and desalination treatment in the SWRO unit 410 can be reduced, and the cost can be reduced and the treatment efficiency can be increased.

In addition, the BWRO unit 420 can reduce the waste disposal cost for disposing the concentrated water generated in the process of desalinating the water blended water of the excellent and ground water. In the concentrated water supply line 440, a valve and a supply pump controlled by the control unit 700 are installed, and sensors for measuring the flow meter and water quality can be installed.

The second buffer tank 320 receives and stores the treated water filtered in the second UF unit 250 after blending in the second blending tank 120 and may be provided with an agitator for mixing the treated water have. In the second buffer tank 320, the treated water having undergone the seawater desalination process in the SWRO unit 410 can be replenished and supplied through the replenishment line 430.

The SWRO unit 410 desalinates the treated water discharged from the first buffer tank 310 to generate fresh water. The SWRO unit 410 may include an SWRO separator (not shown) and a high-pressure pump for forcibly supplying the treated water to the SWRO membrane. Therefore, in the SWRO membrane, it is possible to remove ionic substances, minerals and the like including the salt contained in the treated water. Such SWRO membranes may include reverse osmosis membranes and nanofilters. Further, a pH meter and a TDS meter for analyzing the quality of the influent water and the generated water to the SWRO unit 410 can be installed on the inflow side and the discharge side, respectively. In order to control the supply and production flow rate, Respectively.

The BWRO unit 420 generates treated water discharged from the second buffer tank 320 through a desalination process. The BWRO unit 420 includes a BWRO membrane and a BWRO membrane to reliably remove ionic substances and suspended substances in the treated water. A high-pressure pump, and the like. A pH meter, a TDS meter, and a flow meter are provided on the inlet side and the outlet side of the BWRO unit 420, respectively, for measuring the quality of influent and generated water. The concentrated water remaining in the desalination process in the BWRO unit 420 is supplied to the first buffer tank 310 through the concentrated water supply line 440 and is interblended in the first buffer tank 310.

The generated water generated in each of the SWRO unit 410 and the BWRO unit 420 is supplied to and stored in the storage water tank 510. Groundwater satisfying the set water quality can be directly supplied to and stored in the storage water tank 510, and the treated rainwater and groundwater can be directly supplied and stored in the second UF unit 250. In addition, the generated water stored in the storage tank 510 is supplied to the reservoir (local facility) by the drainage device 520. At this time, hypochlorous acid which is a disinfectant in the process of being supplied from the drainage device 520 to the reservoir is put into the piping and mixed to sterilize and supply the supply water. In addition, in the drainage device 520, the slaked lime can be mixed with the feed water in the pipe, thereby preventing corrosion of the pipe.

It is preferable that the hypochlorous acid used as the disinfectant in the water distributing device 520 is generated and supplied in the second step 530. The salinity generating unit 530 receives the salt produced in the seawater desalination process at the SWRO unit 410, generates hypochlorous acid by electrolysis, and supplies the generated hypochlorous acid to the drain water apparatus 520. As described above, since hypochlorous acid used as a disinfectant is produced and supplied by using the salt generated in the desalination process, there is no need to separately supply the salt, thereby reducing the cost.

Also, a turbidimeter, a pH meter, and a conductivity meter may be installed to measure the quality of the generated water supplied to the reservoir in the distribution water system 520.

The monitoring unit 600 includes a measuring sensor and a flow meter for measuring the water quality and flow rate of the raw water taken from the seawater, the nose water, the stormwater and the groundwater source, the water level meter of the first and second blending baths 110 and 120, And various sensors for measuring water quality and a flow meter installed to measure the water quality of the influent water flowing into the 2UF units 210 and 220. The monitoring unit 600 may include a water level gauge of the first and second buffer tanks 310 and 320, a water quality sensor, and a flow meter for measuring an inflow amount. In addition, various water quality sensors and flow meters for measuring the water quality and the flow rate in the process of supplying generated water generated by the SWRO unit 410 and the BWRO unit 420 to the reservoir may be included. In this way, the monitoring unit 600 can perform the water blending process, the filtration process, the inter-blending and mixing process in the buffer tank, the desalination process (SWRO, BWRO), the disinfection process, And has a configuration capable of measuring the water quality, measuring the flow rate and the water level, and the measured data is collected and transmitted to the control unit 700.

The control unit 700 selectively receives the seawater, the nose water, the storm water, and the ground water according to the preset desalination processing standard based on various measurement data transmitted from the monitoring unit 600, performs water blending, , And the desalination (SWRO, BWRO) process to control the entire system to produce fresh water.

At this time, in the reverse osmosis desalination process, the control unit 700 applies a membrane power saving process for intermittent or discontinuous operation for selective process application (SWRO or BWRO) according to the influent water quality, Can be reduced.

That is, even while the SWRO process is in progress, the raw water is supplied to the second buffer tank 320 intermittently or discontinuously through the replenishing line 430 so that the BWRO unit 420 intermittently or discontinuously By controlling the BWRO process to be performed, damage caused when the RO membrane of the BWR unit 420 is suspended for a long time can be prevented. Of course, the control unit 700 intermittently or discontinuously drives the SWRO unit 410 in the water treatment process using only the BWRO unit 420 to use the RO membrane to prevent damage to the RO membrane, thereby reducing the maintenance cost Can be obtained.

Further, in the seawater desalination system using water blending according to the present invention, the plant facilities necessary for the process are modularized for each water treatment process, so that the modularized units can be separated and assembled as needed. Therefore, when only the seawater desalination facility function is needed, only the water treatment function is required, and only the groundwater and stormwater treatment function are required, only the necessary facilities can be assembled and used. Accordingly, it is possible to carry out the customized combination according to the need, and to move, install, and dismantle the apparatus, and accordingly, the installation cost, the transportation cost, and the operation cost can be saved.

2, the operation control module 10, the preprocessing module 20, the SWRO module 30, the BWRO module 40, the chemical processing module 50, the post-processing module 60, etc. Can be operated in combination with the water treatment equipment so as to use the modules in order. 3 to 5, the modules 10 to 60 are constituted by the container 100 having a predetermined size and shape, and the basic facilities are installed in the moduleized container 100, And the container 100 are combined and connected to each other to operate the required water treatment facility.

3 to 5, the modular container 100 is provided with an entrance 101 and a window 102 on the front or rear side, and shutter doors 104 and 104 are provided on the left and right sides respectively So that the containers 100 connected to each other can be connected to communicate with each other and the administrator can move.

In addition, through holes 105 and 106 are formed in the lower edge portions of the left and right wall surfaces, respectively, so that adjacent containers 100 can be electrically connected to each other.

In this manner, the process-specific module can be installed inside the container 100 which is modularized and standardized. Therefore, as shown in FIG. 2, it is possible to assemble and separate various combinations of facilities according to the raw water to be treated, assemble and use only required process modules, and to selectively process the necessary processes for water deficient areas It is possible to construct and operate the water supply system directly, so that there is an advantage that it can cope with a water shortage situation immediately.

Hereinafter, a method of operating a system according to scenarios according to water quality of a water supply source using a water desalination system using water blending according to an embodiment of the present invention will be described in detail.

The present invention relates to a process for selectively removing raw water according to a water quality, a process for mixing raw water taken by water blending, a process for filtering raw water mixed with water using a filtration membrane, Desalination can be performed step by step (SWRO, BWRO) -> Storage in production tank -> Dispensing process (disinfectant supply, slaked lime supply), and it can be modularized by each process, separated and assembled for each unit, Can be operated by using only the unit of FIG.

That is, referring to FIGS. 6 to 8, the monitoring unit 600 can operate the water treatment process in approximately six operating scenarios according to the water quality (TDS) of the raw water and the type of the water source.

Among the six operating scenarios, there are scenarios A, B, and C in which the salt water is contained in the raw water, and the seawater desalination process is performed after the blending process using the first blending tank 110. In the second blending tank 120, , And scenarios D, E, and F that undergo a desalination process after being subjected to a blending process.

First, water is selectively taken from nose, ground water and stormwater including seawater as a water supply source according to the site and environment, and the raw water is supplied to the first blending tank 110 and mixed.

The TDS of the treated water blended in the first blending tank 110 is measured, and when the measured TDS is 25,000 mg / L or more, that is, through the scenario A process. That is, the treated water discharged from the first blending tank 110 is supplied to the first UF unit 210 and subjected to membrane filtration treatment to remove particulate pollutants (suspended substances, proteins, polysaccharide polymers, etc.). The treated water discharged from the first UF unit 210 is supplied to the SWRO unit 410 and is subjected to a desalination process. The treated water treated by the SWRO unit 410 is supplied to the BWRO unit 420, Treated, then re-carbonated, and supplied to the desired destination.

When the TDS of the treated water in the first blending tank 110 is less than 25,000 mg / L of 15,000 mg / L or more, that is, when mixed with seawater alone or mixed with sea water, ground water and stormwater, . That is, the treated water blended in the first blending tank 110 is supplied to the first UF unit 210 to be filtered, then supplied to the SWRO unit 410, subjected to a desalination process, .

Next, according to scenario C, when the TDS of the treated water in the first blending tank 110 is 400 mg / L or more and less than 15,000 mg / L, that is, when the sea water, the nose water, The treated water treated in the tank 110 is supplied to the first UF unit 210 to perform membrane filtration. The treated water discharged from the first UF unit 210 may be supplied to the BWRO unit 420, treated through a desalination process, and then supplied to a user through a re-carbonation process. In other words, when the TDS is low, it can be treated only through the desalination process (BWRO) without the desalination process, thereby reducing the cost and simplifying the treatment process.

Referring to FIGS. 6 and 8, when only groundwater and rainwater are used as raw water to be taken in, raw water is supplied to the second blending tank 120 for blending. If the TDS of the treated water blended in the second blending tank 120 is not more than 100 mg / L and the turbidity is not less than 0.5 NTU, the groundwater and storm are blended and processed according to scenario D. That is, the treated water discharged from the second blending tank 120 is supplied to the BWRO unit 420, treated through the desalination process, and then supplied to the user through the recarbonization process.

Further, when the TDS of the treated water blended in the second blending tank 120 is 100 mg / L or less and the turbidity is less than 0.5 NTU, the groundwater and stormwater are blended and treated according to Scenario E. That is, the treated water blended in the second blending tank 120 is used and supplied through the ion exchange treatment process and the recarbonization process.

In addition, when the intake source is the ground water alone, it can be supplied to the use place after the re-carbonization process without any additional process (scenario F).

INDUSTRIAL APPLICABILITY As described above, according to the seawater desalination system and the operating method of the present invention, the following operational effects can be expected. In other words, since conventional facilities, which are constructed in a so-called one-skid configuration and not configured independently, are assembled and installed centering on water resources, the process can not be changed in response to changes in the water quality and location of the site inflow, , Since the facility is modularized according to each processing process, the water production process can be selectively configured to the optimum process according to the required process and the influent water quality, so that the water production process can be actively responded to the change of situation and environment. It is very suitable. In addition, through the process modularization, it is possible to reduce the weight and volume of the processing facility, thereby reducing the transportation cost and reducing the facility area.

In addition, the present invention uses pre-blending and inter blending technology for energy saving, and pre-blending the influent water, sea water, groundwater, and stormwater to lower total dissolved solids (TDS) It is possible to reduce the osmotic pressure of the seawater and to improve the recovery rate of the SWRO process.

In addition, it is possible to shorten the operation time and reduce the operation and maintenance cost by quickly obtaining the required production quantity by improving the recovery rate.

In addition, when the pollutants of ground water, nose water, and stormwater are treated in BWRO, concentrated water is generated, and the concentrated water thus generated has to be reprocessed through a separate wastewater treatment facility. However, Inter Blending can be used without reprocessing separately, and the SWRO recovery rate can be dramatically improved by lowering the TDS through sea water blending.

In addition, by applying the decision program by the control unit 700, the operation management cost and the maintenance cost compared to the existing SWRO process can be reduced through selective operation of the SWRO, BWRO, ion exchange process according to the quality of the raw water.

In addition, membrane recharge technique is applied to intermittent and discontinuous operation for selective process according to influent water quality in reverse osmosis desalination process. RO membrane breakdown rate is evaluated through application of this technology, operation management fee, maintenance fee Can be saved.

In addition, by using real-time LI control (injection of liquid slime), pipe corrosion inhibition and scale prevention technology can be applied to reduce the cost of pipe replacement and maintenance costs.

In addition, by using the concentrated water generated in the seawater desalination process, hypochlorous acid, which is a disinfectant, can be generated, thereby reducing the hypochlorous acid cost for chlorine input.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. Those skilled in the art will readily appreciate that many modifications and variations of the present invention are possible without departing from the spirit and scope of the appended claims.

100 .. container 110 .. first blending tank
120 .. Second blending tank 210 .. First UF unit
220 .. second UF unit 310 .. first buffer tank
320. Second buffer tank 410. SWRO unit
420 .. BWRO part 430 .. supplementary line
440 .. concentrated water supply line 510 .. storage tank
520. Distribution water device 530 .. Teflon generator
600 .. monitoring section 700 .. control unit

Claims (10)

A first blending tank into which seawater, nose water, stormwater and groundwater are introduced and mixed;
A second blending tank for introducing and mixing stormwater and groundwater;
A first UF unit installed to remove contaminants from the treated water discharged from the first blending tank;
A second UF unit installed to remove contaminants from the treated water discharged from the second blending tank;
A first buffer tank for receiving treated water discharged from the first UF unit;
A second buffer tank for receiving treated water discharged from the second UF unit;
A SWRO (Sea Water Reverse Osmosis) unit for desalinating the treated water discharged from the first buffer tank;
A BWRO (Brackish Water Reverse Osmosis) unit for desalinating the treated water discharged from the second buffer tank;
A storage tank for storing treated water discharged from each of the SWRO unit and the BWRO unit;
A distribution water device for distributing and supplying the treated water in the storage water tank to a drainage or use place;
A replenishing line for supplying treated water discharged from the SWRO to the second buffer tank; And
And a control unit for automatically controlling the water treatment process through the movement of the treated water and the operation of the SWRO unit and the BWRO unit according to the kind of the inflow water and the water quality. The method according to claim 1,
Further comprising a concentrated water supply line for supplying the concentrated water remaining in the BWRO to the first buffer tank. 3. The method according to claim 1 or 2,
Further comprising a sodium chloride generating unit for generating sodium hypochlorite by using the concentrated water generated in the seawater desalination process in the SWRO unit and supplying the sodium hypochlorite to the drain water supply unit for disinfection treatment. The method of claim 3,
A first branch path branched to supply the treatment water discharged from the first blending tank to the second UF unit; And
And a second branch path branched to supply treatment water discharged to the second UF unit to the first buffer tank,
Characterized in that the first and second UF parts, the SWRO part and the BWRO part are installed in a modularized mobile container so that they can be assembled and separated from each other, selectively connectable and detachable, Seawater Desalination System Using Blending. A first blending tank for introducing and mixing a source of water including raw water including salinity;
A second blending tank for introducing and mixing the water source not containing the salt;
A first UF unit installed to remove contaminants from the treated water discharged from the first blending tank;
A second UF unit installed to remove contaminants from the treated water discharged from the second blending tank;
A first buffer tank for receiving treated water discharged from the first UF unit;
A second buffer tank for receiving treated water discharged from the second UF unit;
A SWRO (Sea Water Reverse Osmosis) unit for desalinating the treated water discharged from the first buffer tank;
A BWRO (Brackish Water Reverse Osmosis) unit for desalinating the treated water discharged from the second buffer tank;
A storage tank for storing treated water discharged from each of the SWRO unit and the BWRO unit;
A distribution water device for distributing and supplying the treated water in the storage water tank to a drainage or use place;
A replenishing line for supplying treated water discharged from the SWRO to the second buffer tank; And
And a control unit for automatically controlling the water treatment process through the movement of the treated water and the operation of the SWRO unit and the BWRO unit in accordance with the TDS and turbidity of the inflow source water. 6. The apparatus according to claim 5,
Wherein the control unit controls the movement and operation of the treated water so that the treated water discharged from the first blending tank is water-treated while passing through the first UF unit, the SWRO unit, and the BWRO unit stepwise, when the TDS of the treated water discharged from the first blending tank is 25,000 mg / L or more A seawater desalination system using water blending. 6. The apparatus according to claim 5,
And controlling the movement and operation of the treated water so as to be water-treated while passing through the first UF unit and the BWRO unit stepwise, when the TDS of the treated water discharged from the first blending tank is less than 15,000 mg / L and less than 25,000 mg / L A seawater desalination system using water blending. 6. The apparatus according to claim 5,
Wherein the control unit controls the movement and operation of the treatment water so that the TDS of the treated water discharged from the first blending tank is 400 mg / L or more and less than 15,000 mg / L, A seawater desalination system using water blending. 9. The control apparatus according to any one of claims 5 to 8,
Characterized in that when the TDS of the treated water discharged from the second blending tank is not more than 100 mg / L and the turbidity is not less than 0.5 NTU, the second UF unit and the BWRO are controlled so as to be water- A seawater desalination system using water blending. 10. The apparatus according to claim 9,
When the TDS of the treated water discharged from the second blending tank is 100 mg / L or less and the turbidity is less than 0.5 NTU, the treated water discharged from the second blending tank is subjected to the recarbonization step And controlling the water movement and operation of the water desalination system.

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