KR20120000648A - Apparatus and method of cleaning reverse osmosis for sea water desalination - Google Patents

Apparatus and method of cleaning reverse osmosis for sea water desalination Download PDF

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KR20120000648A
KR20120000648A KR1020100061004A KR20100061004A KR20120000648A KR 20120000648 A KR20120000648 A KR 20120000648A KR 1020100061004 A KR1020100061004 A KR 1020100061004A KR 20100061004 A KR20100061004 A KR 20100061004A KR 20120000648 A KR20120000648 A KR 20120000648A
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reverse osmosis
seawater
osmosis membrane
cleaning
unit
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KR1020100061004A
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Korean (ko)
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KR101206618B1 (en
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임우섭
소성일
홍종현
하주석
박민정
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효성굿스프링스 주식회사
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
    • B01D61/02—Reverse osmosis; Hyperfiltration ; Nanofiltration
    • B01D61/025—Reverse osmosis; Hyperfiltration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D65/00—Accessories or auxiliary operations, in general, for separation processes or apparatus using semi-permeable membranes
    • B01D65/02—Membrane cleaning or sterilisation ; Membrane regeneration
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/26—Treatment of water, waste water, or sewage by extraction
    • C02F1/265—Desalination
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
    • C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
    • C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00—Multistage treatment of water, waste water or sewage
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/08—Seawater, e.g. for desalination
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2201/00—Apparatus for treatment of water, waste water or sewage
    • C02F2201/002—Construction details of the apparatus
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A20/00—Water conservation; Efficient water supply; Efficient water use
    • Y02A20/124—Water desalination
    • Y02A20/131—Reverse-osmosis

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Nanotechnology (AREA)

Abstract

PURPOSE: An apparatus and a method for washing reverse osmosis membrane for seawater desalination are provided to increase the exchanging cycle of the reverse osmosis membrane by washing the reverse osmosis membrane. CONSTITUTION: An apparatus(100) for washing reverse osmosis membrane for seawater desalination includes a pre-treating part(110), a pump(120), a reverse osmosis part(130), a monitoring part(140), and a washing solution supplying part(150). The pre-treating part eliminates colloidal materials, organic materials, inorganic materials, and microorganisms from seawater. The reverse osmosis part discharges desalinated water in which salt is separated from the seawater. The washing solution supplying part supplies a washing solution to the reverse osmosis part. The monitoring part measures the flux, the pressure, and the salt eliminating rate of the desalinated water. The washing solution is citric acid.

Description

해수담수화용 역삼투막의 세정 장치 및 방법{Apparatus and Method of Cleaning Reverse Osmosis for Sea Water Desalination}Apparatus and Method of Cleaning Reverse Osmosis for Sea Water Desalination}

본 발명은 역삼투막의 세정 장치 방법에 관한 것으로서, 보다 상세하게는 해수를 농축수와 여과수로 분리하는 역삼투막(Reverse Osmosis; RO)에 세정액을 공급하여 역삼투막에 부착되어 있는 스케일을 제거하여 역삼투막의 수명을 연장할 수 있는 해수담수화용 역삼투막의 세정 장치 및 방법에 관한 것이다.The present invention relates to a method for cleaning a reverse osmosis membrane, and more particularly, to supply a cleaning solution to a reverse osmosis membrane (RO) that separates seawater into concentrated water and filtered water, thereby removing the scale attached to the reverse osmosis membrane to reduce the life of the reverse osmosis membrane. The present invention relates to an apparatus and method for cleaning a reverse osmosis membrane for desalination which can be extended.

지구상의 물의 약 97%는 해수로서 물의 양에 있어서는 절대 다수를 차지하고 있으나 생활용수나 산업용수로 이용하기에는 염도가 너무 높아서 사용하기에는 어려움이 있다. 부족한 지표수를 보충하고 물부족이 심화되고 있는 상황에서 해수의 담수화가 많은 주목을 받고 있다.About 97% of the world's water is seawater, which occupies an absolute majority in the amount of water, but its salinity is too high to be used for living or industrial water, making it difficult to use. Desalination of seawater is receiving much attention in the face of lack of surface water and deepening water shortages.

담수화란 염분이 있는 해수 등을 음용수나 기타 용도로 사용할 수 있도록 하기 위하여 염분을 적합하도록 제거하는 일련의 공정이다. 염분농도는 물에 용해되어 있는 정도에 따라 담수(Fresh water), 기수(Brackish water), 해수(Sea water)로 구분한다.Desalination is a series of processes in which salts are properly removed in order to use salty seawater for drinking water or other purposes. Salt concentration is divided into fresh water, brackish water and sea water according to the degree of dissolved in water.

해수는 많은 종류의 염분을 포함하고 있어, 음용수로 사용하기 위해서는 염분을 제거해야만 하며, 해수를 담수화하는 방법으로는 역삼투막을 이용하는 방법이 널리 사용되고 있다. 이때, 역삼투막을 장기간 지속적으로 사용하게 되면 원수 중 오염물질에 의해 막오염(Fouling)을 형성하게 되며, 간헐적인 세척과 화학세정에도 불구하고 담수의 생산량을 일정하게 유지하기 위해서는 역삼투막을 일정한 주기로 교환해야만 한다.Since seawater contains many kinds of salts, salts must be removed in order to use it as drinking water, and a method using a reverse osmosis membrane is widely used for desalination of seawater. In this case, if the reverse osmosis membrane is used continuously for a long time, fouling is formed by contaminants in the raw water, and the reverse osmosis membrane must be replaced at regular intervals in order to maintain the fresh water production despite the intermittent washing and chemical cleaning. do.

따라서 담수화설비의 지속적인 운전 및 막교체 비용의 감소에 따른 경제성 향상을 위해 역삼투막의 교환주기를 연장 할 필요가 있다.Therefore, it is necessary to extend the exchange cycle of reverse osmosis membranes in order to improve economic efficiency due to continuous operation of desalination facilities and reduction of membrane replacement costs.

본 발명은 상기한 문제점을 해결하기 위해 안출된 것으로서, 역삼투막에 의한 해수의 담수화에서 생산수에 변화가 발생되면 이를 감지하여 역삼투막에 세정액을 공급하여 역삼투막을 세정하여 정상적인 담수화가 이루어지도록 하는 해수담수화용 역삼투막의 세정 장치 및 방법을 제공하는 것을 목적으로 한다.The present invention has been made to solve the above problems, seawater desalination for detecting the change in the production water in the desalination of the seawater by the reverse osmosis membrane and supplying the cleaning solution to the reverse osmosis membrane to clean the reverse osmosis membrane to ensure normal desalination An object of the present invention is to provide an apparatus and a method for cleaning a reverse osmosis membrane.

또한, 해수를 담수화하는 역삼투막에 세정액을 공급하여 역삼투막을 세정함으로써 역삼투막의 교환 주기를 증가시킬 수 있는 해수담수화용 역삼투막의 세정 장치 및 방법을 제공하는 것을 목적으로 한다.It is also an object of the present invention to provide a cleaning apparatus and method for desalination reverse osmosis membranes capable of increasing the replacement cycle of reverse osmosis membranes by supplying a cleaning liquid to the reverse osmosis membranes for desalination of seawater.

본 발명의 제1 양상에 의하면, 해수를 처리하여 담수를 생산하는 장치에 있어서, 외부에서 공급된 해수에서 콜로이드 물질, 유기물질, 무기물질, 미생물 등을 제거하는 전처리부; 상기 전처리부에서 배출된 해수를 압송하는 펌프; 상기 전처리된 해수에서 염분이 분리된 담수를 배출하는 역삼투부; 상기 역삼투부에 세정액을 공급하는 세정액 공급부; 및 상기 역삼투부에서의 생산되는 담수의 유량, 압력 및 염제거율을 측정하는 모니터링부; 를 포함하는 해수담수화용 역삼투막의 세정 장치를 제공한다.According to a first aspect of the present invention, there is provided an apparatus for producing fresh water by treating sea water, the apparatus comprising: a pretreatment unit for removing colloidal substances, organic substances, inorganic substances, microorganisms, etc. from seawater supplied from the outside; A pump for pumping the seawater discharged from the pretreatment unit; A reverse osmosis unit for discharging fresh water from which salt is separated from the pretreated seawater; A cleaning liquid supply unit supplying a cleaning liquid to the reverse osmosis unit; And monitoring unit for measuring the flow rate, pressure and salt removal rate of fresh water produced in the reverse osmosis unit; It provides a cleaning device of the reverse osmosis membrane for seawater desalination comprising a.

상기 세정액은 구연산일 수 있다.The cleaning solution may be citric acid.

본 발명의 제2 양상에 의하면, 해수를 처리하여 담수를 생산하는 방법에 있어서, 해수에서 콜로이드 물질, 유기물질, 무기물질, 미생물 등을 제거하는 단계; 상기 해수를 압송하는 단계; 압송된 상기 해수를 역삼투막에 의해 담수화하는 단계; 상기 역삼투부에 의해 생산되는 담수의 유량, 압력 및 염제거율을 측정하는 단계; 상기 담수의 유량, 압력 및 염제거율을 기준값과 비교하는 단계; 및 상기 역삼투부에 세정액을 공급하는 단계; 를 포함하는 해수담수화용 역삼투막의 세정 방법을 제공한다.According to a second aspect of the present invention, there is provided a method of producing fresh water by treating seawater, the method comprising: removing colloidal substances, organic substances, inorganic substances, microorganisms, and the like from seawater; Pumping the sea water; Desalination of the pressurized sea water by a reverse osmosis membrane; Measuring the flow rate, pressure, and salt removal rate of fresh water produced by the reverse osmosis unit; Comparing the freshwater flow rate, pressure and salt removal rate with a reference value; And supplying a cleaning liquid to the reverse osmosis unit. It provides a cleaning method of the reverse osmosis membrane for seawater desalination comprising a.

상기 세정액 공급 단계는 측정된 유량이 기준값보다 3~5% 감소되거나 또는 측정된 압력이 기준값보다 3~5% 상승되거나 또는 측정된 염제거율이 기준값보다 3~5% 증가되면 수행되는 수행될 수 있다.The washing liquid supplying step may be performed when the measured flow rate is reduced by 3 to 5% from the reference value, or the measured pressure is increased by 3 to 5% than the reference value, or the measured salt removal rate is increased by 3 to 5% than the reference value. .

상기 세정액 공급 단계는 상기 세정액이 4~5 분 동안 공급될 수 있다.The cleaning solution supply step may be supplied for 4 to 5 minutes the cleaning solution.

상기 세정액 공급 단계는 상기 세정액이 공급된 후, 상기 역삼투부에 의해 생산되는 담수의 유량, 압력 및 염제거율을 재측정하여 비교하는 단계를 더 포함할 수 있다.The washing liquid supplying step may further include comparing and measuring the flow rate, pressure, and salt removal rate of fresh water produced by the reverse osmosis unit after the washing liquid is supplied.

상기 세정액은 구연산일 수 있다.The cleaning solution may be citric acid.

본 발명의 제3 양상에 의하면, 해수를 처리하여 담수를 생산하는 방법에 있어서, 침적주기를 설정하는 단계; 해수에서 콜로이드 물질, 유기물질, 무기물질, 미생물 등을 제거하는 단계; 상기 해수를 압송하는 단계; 압송된 상기 해수를 역삼투부에 의해 담수화하는 단계; 및 설정된 침적주기가 되면 상기 역삼투부를 담수에 일정 시간동안 침적하는 단계를 포함할 수 있다.According to a third aspect of the present invention, there is provided a method of producing fresh water by treating sea water, the method comprising: setting a deposition cycle; Removing colloidal substances, organic substances, inorganic substances, microorganisms, etc. from seawater; Pumping the sea water; Desalination of the pressurized seawater by reverse osmosis; And when the set deposition period may include the step of immersing the reverse osmosis in fresh water for a predetermined time.

상기와 같은 본 발명은, 역삼투막에 의한 해수의 담수화시 역삼투막에 세정액을 공급하여 역삼투막을 세정하여 정상적인 담수화가 이루어지도록 하는 효과가 있다.The present invention as described above, when the desalination of the sea water by the reverse osmosis membrane has the effect of supplying a cleaning solution to the reverse osmosis membrane to clean the reverse osmosis membrane to achieve normal desalination.

또한, 해수를 담수화하는 역삼투막에 세정액을 공급하여 역삼투막을 세정함으로써 역삼투막의 교환 주기를 증가시키는 효과가 있다.In addition, there is an effect of increasing the exchange cycle of the reverse osmosis membrane by supplying a cleaning liquid to the reverse osmosis membrane to desalination sea water.

도 1은 본 발명의 일 실시예에 따른 해수담수화용 역삼투막의 세정 장치의 구성을 나타내는 도면이다.
도 2는 본 발명의 제1 실시예에 따른 해수담수화용 역삼투막의 세정 방법을 나타내는 흐름도이다.
도 3은 본 발명의 제2 실시예에 따른 해수담수화용 역삼투막의 세정 방법을 나타내는 흐름도이다. 1 is a view showing the configuration of a washing apparatus of the reverse osmosis membrane for seawater desalination according to an embodiment of the present invention.
2 is a flowchart illustrating a cleaning method of the reverse osmosis membrane for seawater desalination according to the first embodiment of the present invention.
Figure 3 is a flow chart showing a cleaning method of the reverse osmosis membrane for seawater desalination according to a second embodiment of the present invention.

이하 첨부된 도면을 참조하면서 본 발명에 따른 바람직한 실시예를 상세히 설명하기로 한다.Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

도 1은 본 발명의 일 실시예에 따른 해수담수화용 역삼투막의 세정 장치의 구성을 나타내는 도면이다. 그리고, 도 2는 본 발명의 제1 실시예에 따른 해수담수화용 역삼투막의 세정 방법을 나타내는 흐름도이다.1 is a view showing the configuration of a washing apparatus of the reverse osmosis membrane for seawater desalination according to an embodiment of the present invention. 2 is a flowchart illustrating a cleaning method of the reverse osmosis membrane for seawater desalination according to the first embodiment of the present invention.

도 1에 도시되어 있는 본 발명의 일 실시예에 따른 역삼투막의 세정 장치(100)의 구성을 도 2를 참조하여 설명하기로 한다.A configuration of the apparatus 100 for cleaning the reverse osmosis membrane according to an embodiment of the present invention shown in FIG. 1 will be described with reference to FIG. 2.

도 1을 참조하면, 본 발명의 일 실시예에 따른 역삼투막의 세정 장치(100)는 전처리부(110), 펌프(120), 역삼투부(130), 모니터링부(140) 및 세정액 공급부(150)를 포함한다.Referring to FIG. 1, the apparatus 100 for cleaning a reverse osmosis membrane according to an embodiment of the present invention may include a pretreatment unit 110, a pump 120, a reverse osmosis unit 130, a monitoring unit 140, and a cleaning solution supply unit 150. It includes.

전처리부(110)는 외부의 해수 취수 장치(미도시)를 통해 취수된 해수에서 콜로이드 물질, 유기물질, 무기물질, 미생물 등과 같은 이물질을 제거하여 배출한다(S110). 여기서, 전처리부(110)는 표준 전처리 방식 또는 막 중심 전처리 방식을 이용할 수 있다. 표준전처리 방식은 모래여과, 다층여과, 카트리지 필터 등을 사용하는 방식이고, 막 중심 전처리 방식은 정밀여과막(Microfiltration Membrane; MF), 한외여과막(Ultrafiltration Membrane; UF) 등을 이용하는 방식이다. 전처리부(110)는 이외에도 다양한 방식을 이용할 수 있다.The pretreatment unit 110 removes and discharges foreign substances such as colloidal substances, organic substances, inorganic substances, and microorganisms from the seawater collected through an external seawater intake apparatus (not shown) (S110). Here, the pretreatment unit 110 may use a standard pretreatment method or a membrane center pretreatment method. The standard pretreatment method is a method using sand filtration, multilayer filtration, cartridge filter, etc., and the membrane-centered pretreatment method is a method using a microfiltration membrane (MF), an ultrafiltration membrane (UF), or the like. The preprocessor 110 may use a variety of methods.

본 실시예에서는 전처리부(110)는 사용자의 필요에 따라 다양한 방식의 여과기를 전처리부(110)에 사용할 수 있고, 동일 종류의 여과기를 복수로 연결하여 사용하는 등 다양하게 구성될 수 있다.In the present exemplary embodiment, the pretreatment unit 110 may use various types of filters in the pretreatment unit 110 according to a user's needs, and may be configured in various ways such as using a plurality of filters of the same type.

펌프(120)는 전처리부(110)에서 전처리된 해수가 후술하는 구성요소로 용이하게 이동할 수 있도록 해수에 고압으로 압력을 가하여 압송한다.The pump 120 applies pressure at high pressure to the seawater so that the seawater pretreated in the pretreatment 110 can be easily moved to a component described later.

역삼투부(130)는 펌프(120)를 통해 압송되는 해수를 유입받은 후, 역삼투막을 이용하여 염분이 제거된 담수를 배출한다. The reverse osmosis unit 130 receives the seawater pumped through the pump 120, and then discharges the fresh water from which the salt is removed using the reverse osmosis membrane.

역삼투부(130)는 해수용((Sea water reverse osmosis) 또는 기수용(Brackish reverse osmosis)으로 구분된다. 역삼투부(130)는 복수개의 베셀(132)이 내장되고, 각각의 베셀(132)에는 6~7개의 역삼투막이 충진되어 사용된다. 역삼투부(130)를 구성하는 역삼투막은 일정한 주기(예를 들어 3~5년)로 교환된다.Reverse osmosis 130 is divided into sea water (Sea water reverse osmosis) or brackish reverse osmosis (reverse osmosis 130) is a reverse osmosis 130 is a plurality of vessels 132 is built, each of the vessel 132 6 to 7 reverse osmosis membranes are used and filled in. The reverse osmosis membrane constituting the reverse osmosis part 130 is exchanged at a constant cycle (for example, 3 to 5 years).

여기서, 삽투압은 농도가 다른 두 액체를 반투막으로 막아 놓았을 때, 용질의 농도가 낮은 쪽에서 농도가 높은 쪽으로 용매가 옮겨가는 현상에 의해 나타나는 압력을 말한다. 역삼투압은 삼투압보다 높은 압력을 가할 때, 용액으로부터 순수한 용매가 반투막을 통해 빠져 나오는 현상을 의미한다. 그리고, 역삼투막은 역삼투 현상을 일으키는 데 사용되는 반투막이다.Here, the insertion pressure refers to the pressure caused by the phenomenon that the solvent moves from the lower concentration of the solute to the higher concentration when two liquids having different concentrations are blocked by the semipermeable membrane. Reverse osmosis means a phenomenon in which pure solvent is released from the solution through the semipermeable membrane when a pressure higher than the osmotic pressure is applied. The reverse osmosis membrane is a semipermeable membrane used to cause reverse osmosis phenomenon.

모니터링부(140)는 역삼투부(130)에서의 생산수의 생산 상태를 측정하여 사용자에게 알려준다. 모니터링부(140)가 측정하는 생산수의 생산 상태는 생산수의 량, 압력 및 생산수의 염제거율이다. 이를 위해, 모니터링부(140)는 유량 센서, 압력 센서 및 염분 센서를 포함할 수 있다. The monitoring unit 140 measures the production state of the production water in the reverse osmosis unit 130 and informs the user. The production state of the production water measured by the monitoring unit 140 is the amount of production water, the pressure and the salt removal rate of the production water. To this end, the monitoring unit 140 may include a flow sensor, a pressure sensor and a salinity sensor.

세정액 공급부(150)는 펌프(120)에 의해 역삼투부(130)로 압송되는 해수에 세정액을 공급한다. 세정액 공급부(150)는 약품 공급 펌프 또는 약품주입기로 구성된다. 또한, 세정액 공급부(150)에서 역삼투부(130)에 공급되는 세정액은 구연산인 것이 바람직하지만, 역삼투막을 세정할 수 있다면 구연산 이외에도 이를 대체할 수 있는 다양한 약품의 사용이 가능하다.The cleaning solution supply unit 150 supplies the cleaning solution to the seawater that is pumped to the reverse osmosis unit 130 by the pump 120. The cleaning liquid supply unit 150 is composed of a chemical supply pump or a chemical injector. In addition, the cleaning solution supplied from the cleaning solution supply unit 150 to the reverse osmosis unit 130 is preferably citric acid. However, if the reverse osmosis membrane can be cleaned, various chemicals may be used in addition to citric acid.

상기와 같이 구성된 본 발명은 다음과 같이 작용한다.The present invention configured as described above works as follows.

도 2는 본 발명의 제1 실시예에 따른 해수담수화용 역삼투막의 세정 방법을 나타내는 흐름도이다.2 is a flowchart illustrating a cleaning method of the reverse osmosis membrane for seawater desalination according to the first embodiment of the present invention.

도 2를 참조하면, 전처리부(110)에서 전처리 공정을 수행하여 콜로이드 물질, 유기물질, 무기물질, 미생물 등과 같은 이물질이 제거(S110)된 해수는 펌프(120)에 의해 역삼투부(130)로 압송(S120)되고, 역삼투부(130)에서 염분이 제거된 생산수로 배출된다(S130). Referring to FIG. 2, seawater from which foreign substances such as colloidal material, organic material, inorganic material, and microorganism are removed by performing a pretreatment process in the pretreatment unit 110 is pumped to the reverse osmosis unit 130 by the pump 120. Pressure (S120) is discharged into the production water from which the salt is removed from the reverse osmosis unit (130) (S130).

여기서, 모니터링부(140)는 역삼투부(130)에서 생산되는 생산수의 생산 상태 즉, 생산되는 생산수의 유량, 압력 및 염제거율을 측정하고, 모니터링부(140)에서 측정된 생산수의 상태를 기준값과 비교한다(S140). Here, the monitoring unit 140 measures the production state of the production water produced in the reverse osmosis unit 130, that is, the flow rate, pressure and salt removal rate of the produced production water, and the state of the production water measured by the monitoring unit 140. Is compared with a reference value (S140).

즉, 모니터링부(140)는 역삼투부(130)의 최초 사용 개시 시점에서 생산되는 생산수의 유량, 압력 및 염제거율을 측정하고, 이를 기준값으로서 기 설정하도록 한다. That is, the monitoring unit 140 measures the flow rate, pressure, and salt removal rate of the production water produced at the time of the first use of the reverse osmosis unit 130, and sets it as a reference value.

이후, 모니터링부(140)는 역삼투부(130)에서 생산되는 생산수의 유량, 압력 및 염제거율을 측정하고, 이를 설정값과 비교한다. 비교 결과, 역삼투부(130)에서 생산되는 생산수의 유량이 3~5% 감소하거나 압력이 3~5% 상승하거나 염제거율이 3~5% 증가하는 등의 적어도 한가지의 조건이 해당되면 역삼투부(130)의 세정이 필요한 시기인 것으로 판단하여, 소정의 세정 신호를 출력한다(S150). 여기서, 모니터링부(140)가 측정하는 압력은 원수와 생산수의 막간 차압이다. Then, the monitoring unit 140 measures the flow rate, pressure and salt removal rate of the production water produced in the reverse osmosis unit 130, and compares it with the set value. As a result, if at least one condition such as a flow rate of the produced water produced by the reverse osmosis unit 130 is reduced by 3 to 5%, a pressure is increased by 3 to 5%, or a salt removal rate is increased by 3 to 5%, the reverse osmosis unit It is determined that the cleaning of the 130 is a time required, and a predetermined cleaning signal is output (S150). Here, the pressure measured by the monitoring unit 140 is the interlayer differential pressure between the raw water and the production water.

세정 신호가 출력되지 않는 경우에는 전처리된 해수를 이용하여 해수의 담수화 즉, 생산수의 생산을 계속 진행한다.If the cleaning signal is not output, desalination of the seawater, that is, production of the produced water, is continued using the pretreated seawater.

모니터링부(140)에서 출력되는 세정 신호를 입력받은 세정액 공급부(150)는 역삼투부(130)로 공급되는 해수에 세정액을 주입하여 역삼투부(130)에 공급되도록 한다(S160). 이때, 역삼투부(130)는 역삼투부(130)에서 생산된 생산수에 의해 베셀(132)이 채워진 상태를 유지한다. 또한, 역삼투부(130)에 공급되는 세정액은 구연산인것이 바람직하다. 이외에도 역삼투막을 세정할 수 있다면 구연산 이외에도 이를 대체할 수 있는 다양한 약품의 사용이 가능하다.The cleaning solution supply unit 150 receiving the cleaning signal output from the monitoring unit 140 injects the cleaning solution into the seawater supplied to the reverse osmosis unit 130 to be supplied to the reverse osmosis unit 130 (S160). At this time, the reverse osmosis unit 130 maintains the vessel 132 is filled by the production water produced in the reverse osmosis unit 130. In addition, the cleaning liquid supplied to the reverse osmosis unit 130 is preferably citric acid. In addition, if the reverse osmosis membrane can be cleaned, in addition to citric acid, it is possible to use various chemicals that can replace it.

여기서, 세정액의 공급시간은 4~5분인 것이 바람직하다. 역삼투부(130)에 세정액이 공급되면 역삼투부(130)에서 생산수의 생산을 방해하는 스케일이 제거되어 생산수의 생산 상태는 설정값에 근접하게 된다. 따라서, 세정액을 4~5분 동안 공급한 후, 모니터링부(140)는 다시 생산수의 유량, 압력 및 염제거율을 측정하고, 이를 설정값과 비교한다(S170).Here, it is preferable that the supply time of a washing | cleaning liquid is 4 to 5 minutes. When the cleaning liquid is supplied to the reverse osmosis unit 130, the scale that prevents the production of the produced water is removed from the reverse osmosis unit 130, so that the production state of the produced water approaches the set value. Therefore, after supplying the cleaning solution for 4 to 5 minutes, the monitoring unit 140 again measures the flow rate, pressure and salt removal rate of the production water, and compares it with the set value (S170).

측정값이 설정값과 근접하면, 즉, 생산수의 유량 감소량이 3~5%이거나 압력 증가율이 3~5% 이내이거나 염제거율 상승률이 3~5% 이내인지 판단하여(S180), 모든 조건이 기준치 이내이면 역삼투부(130)는 정상적으로 세정된 것으로 판단하여 더 이상의 세정액 공급을 중단하고(S190), 담수화 작업을 진행한다.When the measured value is close to the set value, i.e., whether the flow rate decrease of the production water is 3 to 5%, the pressure increase rate is within 3 to 5%, or the salt removal rate rise is within 3 to 5% (S180). If the reference value is within the reverse osmosis unit 130 is determined to be normally cleaned and stops supplying more cleaning solution (S190), and proceeds with desalination.

하지만, 측정값과 여전히 설정값과 차이가 있는 경우에는 다시 세정액을 공급하는 단계(S160)를 수행한다.However, if there is still a difference between the measured value and the set value, step S160 of supplying the cleaning liquid is performed again.

한편, 역삼투부(130)의 세정은 다음과 같이 이루어질 수도 있다.On the other hand, the reverse osmosis 130 may be cleaned as follows.

도 3은 본 발명의 제2 실시예에 따른 해수담수화용 역삼투막의 세정 방법을 나타내는 흐름도이다.Figure 3 is a flow chart showing a cleaning method of the reverse osmosis membrane for seawater desalination according to a second embodiment of the present invention.

도 3을 참조하면, 우선, 사용자는 역삼투부(130)의 침적 주기를 설정한다(S210). 여기서, 설정되는 침적주기는 주1회 간격으로서, 설정된 침적주기가 되면 2~4시간 동안 침적이 이루어지는 것이 바람직하다. 침적주기의 카운팅은 별도의 타이머를 사용할 수 있고, 위에서와 같이 주1회와 같이 장시간의 침적 주기라면 작업자의 기억이나 기록에 의해 수행될 수도 있다. 이외에도 침적 주기는 사용자의 필요에 의해 다양하게 변경될 수 있다.Referring to Figure 3, first, the user sets the deposition period of the reverse osmosis unit 130 (S210). Here, the deposition cycle is set once a week, it is preferable that the deposition is made for 2 to 4 hours when the set deposition cycle. Counting of the deposition cycle may use a separate timer, and may be performed by the memory or recording of the operator if a long period of deposition, such as once a week as described above. In addition, the deposition cycle can be changed in various ways according to the needs of the user.

이후, 이전의 실시예와 동일한 방법으로 해수를 전처리(S220)한 후, 해수를 압송한다(S230). 그리고, 역삼투부(130)를 이용하여 해수를 담수화한다(S240). Thereafter, after the seawater is pretreated (S220) in the same manner as in the previous embodiment, the seawater is pumped (S230). Then, the seawater is desalted using the reverse osmosis unit 130 (S240).

이후, 침적 주기가 되면(S250), 역삼투부(130)를 역삼투부(130)에서 생산된 생산수에 일정 시간 침적(S260)시켜 역삼투부(130)의 스케일이 제거되도록 한다. 예를 들어, 주1회 간격으로 2~4시간 동안 역삼투부(130)가 침적되도록 한다. Then, when the deposition cycle (S250), the reverse osmosis unit 130 is immersed in the production water produced in the reverse osmosis unit 130 for a predetermined time (S260) to remove the scale of the reverse osmosis unit 130. For example, reverse osmosis 130 is deposited for 2-4 hours at weekly intervals.

본 실시예에 의한 세정 방법은 도 1에 도시된 세정 장치(100)에서 모니터링부(140)와 세정액 공급부(150)의 사용없이 수행될 수 있다.The cleaning method according to the present embodiment may be performed in the cleaning apparatus 100 shown in FIG. 1 without using the monitoring unit 140 and the cleaning liquid supply unit 150.

본 발명은 도면에 도시된 실시예를 참고로 설명되었으나 이는 예시적인 것에 불과하며, 본 기술 분야의 통상의 지식을 가진 자라면 이로부터 다양한 변형 및 균등한 다른 실시예가 가능하다는 점을 이해할 것이다. 따라서 본 발명의 진정한 기술적 보호 범위는 첨부된 특허청구범위의 기술적 사상에 의하여 정해져야 할 것이다.Although the present invention has been described with reference to the embodiments shown in the drawings, this is merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent other embodiments are possible. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

100: 역삼투막 세정 장치
110: 전처리부
120: 펌프
130: 역삼투부
140: 모니터부
150: 세정액 공급부100: reverse osmosis membrane cleaning device
110: preprocessing unit
120: pump
130: reverse osmosis
140: monitor unit
150: cleaning liquid supply unit

Claims (8)

해수를 처리하여 담수를 생산하는 장치에 있어서,
외부에서 공급된 해수에서 콜로이드 물질, 유기물질, 무기물질, 미생물 등을 제거하는 전처리부;
상기 전처리부에서 배출된 해수를 압송하는 펌프;
상기 전처리된 해수에서 염분이 분리된 담수를 배출하는 역삼투부;
상기 역삼투부에 세정액을 공급하는 세정액 공급부; 및
상기 역삼투부에서 생산되는 담수의 유량, 압력 및 염제거율을 측정하는 모니터링부;
를 포함하는
해수담수화용 역삼투막의 세정 장치.In the apparatus for treating fresh water to produce fresh water,
A pretreatment unit for removing colloidal substances, organic substances, inorganic substances, microorganisms, etc. from seawater supplied from the outside;
A pump for pumping the seawater discharged from the pretreatment unit;
A reverse osmosis unit for discharging fresh water from which salt is separated from the pretreated seawater;
A cleaning liquid supply unit supplying a cleaning liquid to the reverse osmosis unit; And
Monitoring unit for measuring the flow rate, pressure and salt removal rate of fresh water produced in the reverse osmosis unit;
Containing
Cleaning device for reverse osmosis membrane for seawater desalination. 제1항에 있어서,
상기 세정액은 구연산인
해수담수화용 역삼투막의 세정 장치.The method of claim 1,
The cleaning liquid is citric acid
Cleaning device for reverse osmosis membrane for seawater desalination. 해수를 처리하여 담수를 생산하는 방법에 있어서,
해수에서 콜로이드 물질, 유기물질, 무기물질, 미생물 등을 제거하는 단계;
상기 해수를 압송하는 단계;
압송된 상기 해수를 역삼투막에 의해 담수화하는 단계;
상기 역삼투막에 의해 생산되는 담수의 유량, 압력 및 염제거율을 측정하는 단계;
상기 담수의 유량, 압력 및 염제거율을 기준값과 비교하는 단계; 및
상기 역삼투막에 세정액을 공급하는 단계;
를 포함하는
해수담수화용 역삼투막의 세정 방법.In the method of producing fresh water by treating sea water,
Removing colloidal substances, organic substances, inorganic substances, microorganisms, etc. from seawater;
Pumping the sea water;
Desalination of the pressurized sea water by a reverse osmosis membrane;
Measuring the flow rate, pressure, and salt removal rate of fresh water produced by the reverse osmosis membrane;
Comparing the freshwater flow rate, pressure and salt removal rate with a reference value; And
Supplying a cleaning liquid to the reverse osmosis membrane;
Containing
Method for cleaning reverse osmosis membrane for seawater desalination. 제3항에 있어서,
상기 세정액 공급 단계는
측정된 유량이 기준값보다 3~5% 감소되거나 또는
측정된 압력이 기준값보다 3~5% 상승되거나 또는
측정된 염제거율이 기준값보다 3~5% 증가되면 수행되는
해수담수화용 역삼투막의 세정 방법.The method of claim 3,
The cleaning liquid supply step
The measured flow rate is reduced by 3-5% below the reference value, or
The measured pressure is increased by 3-5% above the reference value, or
If the measured salt removal rate is increased by 3-5% above the reference value,
Method for cleaning reverse osmosis membrane for seawater desalination. 제4항에 있어서,
상기 세정액 공급 단계는
상기 세정액이 4~5 분 동안 공급되는
해수담수화용 역삼투막의 세정 방법.The method of claim 4, wherein
The cleaning liquid supply step
The cleaning liquid is supplied for 4-5 minutes
Method for cleaning reverse osmosis membrane for seawater desalination. 제5항에 있어서,
상기 세정액 공급 단계는
상기 세정액이 공급된 후, 상기 역삼투부에 의해 생산되는 담수의 유량, 압력 및 염제거율을 재측정하여 비교하는 단계를 더 포함하는
해수담수화용 역삼투막의 세정 방법.The method of claim 5,
The cleaning liquid supply step
After the cleaning liquid is supplied, further comprising the step of re-measuring and comparing the flow rate, pressure and salt removal rate of fresh water produced by the reverse osmosis unit
Method for cleaning reverse osmosis membrane for seawater desalination. 제4항에 있어서,
상기 세정액은 구연산인
해수담수화용 역삼투막의 세정 방법.The method of claim 4, wherein
The cleaning liquid is citric acid
Method for cleaning reverse osmosis membrane for seawater desalination. 해수를 처리하여 담수를 생산하는 방법에 있어서,
침적주기를 설정하는 단계;
해수에서 콜로이드 물질, 유기물질, 무기물질, 미생물 등을 제거하는 단계;
상기 해수를 압송하는 단계;
압송된 상기 해수를 역삼투부에 의해 담수화하는 단계; 및
설정된 침적주기가 되면 상기 역삼투부를 담수에 일정 시간동안 침적하는 단계를 포함하는
해수담수화용 역삼투막의 세정 방법.In the method of producing fresh water by treating sea water,
Establishing a deposition cycle;
Removing colloidal substances, organic substances, inorganic substances, microorganisms, etc. from seawater;
Pumping the sea water;
Desalination of the pressurized seawater by reverse osmosis; And
When the deposition period is set to include the step of immersing the reverse osmosis in fresh water for a predetermined time
Method for cleaning reverse osmosis membrane for seawater desalination.
KR1020100061004A 2010-06-28 2010-06-28 Apparatus and Method of Cleaning Reverse Osmosis for Sea Water Desalination KR101206618B1 (en)

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