KR101481079B1 - Apparatus for purifying mixed water of raw water and concentrated water - Google Patents

Apparatus for purifying mixed water of raw water and concentrated water Download PDF

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KR101481079B1
KR101481079B1 KR20140054571A KR20140054571A KR101481079B1 KR 101481079 B1 KR101481079 B1 KR 101481079B1 KR 20140054571 A KR20140054571 A KR 20140054571A KR 20140054571 A KR20140054571 A KR 20140054571A KR 101481079 B1 KR101481079 B1 KR 101481079B1
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water
raw water
membrane filtration
filtration unit
concentrated
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KR20140054571A
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Korean (ko)
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김형건
김관엽
김정주
박영희
우성민
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주식회사 포스코건설
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    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D71/00—Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
    • B01D71/02—Inorganic material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D71/00—Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
    • B01D71/06—Organic material
    • B01D71/30—Polyalkenyl halides
    • B01D71/32—Polyalkenyl halides containing fluorine atoms
    • B01D71/34—Polyvinylidene fluoride
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2311/00—Details relating to membrane separation process operations and control
    • B01D2311/26—Further operations combined with membrane separation processes
    • B01D2311/2642—Aggregation, sedimentation, flocculation, precipitation or coagulation
    • 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
    • B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
    • B01D61/14—Ultrafiltration; Microfiltration
    • B01D61/145—Ultrafiltration
    • 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
    • B01D61/14—Ultrafiltration; Microfiltration
    • B01D61/147—Microfiltration

Abstract

The present invention relates to an apparatus for purifying mixed water of raw water and concentrated water, which comprises an organic membrane filtration unit consisting of at least one organic membrane for filtering some of raw water; an inorganic membrane filtration unit for filtering mixed water of remaining raw water and concentrated water remaining in the organic filtration unit; and a mixing control unit installed at the upper part of the inorganic membrane filtration unit and controlling the mixing ratio of the raw water and the concentrated water. Accordingly, the present invention provides effects of facilitating the treatment of concentrated water and increasing the recovery of raw water by distributing the raw water to the organic filtration unit and the inorganic filtration unit to filter, and filtering the concentrated water and the raw water in the organic filtration unit by controlling the mixing ratio with the mixing control unit.

Description

원수와 농축수의 혼합식 정수처리장치{Apparatus for purifying mixed water of raw water and concentrated water}BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for purifying mixed water of raw water and concentrated water,

본 발명은 원수와 농축수의 혼합식 정수처리장치에 관한 것으로서, 보다 상세하게는 원수를 분리막으로 여과하여 정수하는 원수와 농축수의 혼합식 정수처리장치에 관한 것이다.The present invention relates to a mixed water treatment apparatus for raw water and concentrated water, and more particularly, to a mixed water treatment apparatus for raw water and concentrated water for filtering raw water through a separation membrane.

수처리장치에서는 응집, 침전, 여과 등의 방법을 이용하여 법적인 수질기준 이내로 처리하여 방류하고 있다. 또한 수처리장치에는 분리막을 이용하여 원수에 포함된 미생물이나 이물질을 걸러내는 막여과조(또는 막분리조)가 적용되고 있다.In the water treatment system, it is treated and discharged in accordance with the legal water quality standard by the methods such as coagulation, sedimentation and filtration. Also, a membrane filtration tank (or membrane separation tank) for filtering microorganisms or foreign substances contained in raw water is applied to a water treatment apparatus using a separation membrane.

분리막법은 분리막의 세공크기에 따라 정밀여과(microfiltration), 한외여과(ultrafiltration), 나노여과(nanofiltration), 역삼투여과(reverse osmosis) 등이 사용되고 있다.The separation membrane method is performed by microfiltration, ultrafiltration, nanofiltration, reverse osmosis, and the like depending on the pore size of the membrane.

특히, 침지형 분리막은 압력용기 없이 수조 내에 직접 침지시켜 사용하기 때문에, 분리막 시스템에 대한 별도의 공간이 필요 없고, 흡입펌프의 진공압에 의해 처리량 만큼만 흡입하는 방식이어서 외부순환식에 비해 부지면적과 동력비가 적게 드는 장점이 있다.Particularly, since the immersion type membrane is directly immersed in a water tank without using a pressure vessel, there is no need for a separate space for the membrane system, and the suction pump sucks only the throughput by the vacuum pressure of the suction pump. There is an advantage that it is less.

하지만, 운전시간이 지속되면 분리막 표면에 부유물질 등이 흡착하여 막오염 현상이 발생하게 되는데, 이를 해결하기 위해 운전중 막분리조 내에 공기를 주입하여 오염물질이 분리막 표면에 흡착하는 현상을 줄여줌과 동시에 분리막 표면에 흡착한 오염물이 탈리되도록 하는데, 필요한 경우에는 처리수인 물과 공기를 이용하여 침지형 분리막을 역세척함으로써 막오염현상을 억제시킨다.However, if the operation time is continued, the suspended solids are adsorbed on the surface of the separator to cause membrane contamination. To solve this problem, air is injected into the membrane separator during operation to reduce the adsorption of contaminants onto the separator surface. At the same time, the contaminants adsorbed on the surface of the separator are desorbed. If necessary, the impregnation membrane is backwashed with water and air, which are treated water, to suppress membrane contamination.

그러나, 이러한 조작의 경우에도 침지형 막여과조에 과도한 부하가 걸려 장기적으로 사용하지 못하고, 또한 처리된 처리수의 부유물질이 농축되는 경우 운전을 정지하고 농축된 막여과조의 미처리수를 별도로 제거한 후 다시 운전하는 등의 단점이 있어서, 실제 공정상에서는 적용하기가 매우 어려운 단점이 있다.However, even in such an operation, when the immersion type membrane filtration tank is excessively loaded and can not be used for a long period of time, when the suspended solids in the treated water are concentrated, the operation is stopped and the untreated water in the concentrated membrane filtration tank is removed separately, There is a disadvantage in that it is very difficult to apply in an actual process.

즉, 종래의 침지형 분리막 정수처리장치는 하나의 막여과조를 설치하여 수행하므로, 분리막의 부하가 많이 걸려 운전시간을 장시간 연장할 수 없다는 문제가 있었다.That is, since the conventional immersion type membrane water treatment apparatus is provided with one membrane filtration tank, there is a problem that the operation time can not be prolonged for a long time due to a heavy load on the separation membrane.

도 1에 나타낸 바와 같이 종래의 정수처리장치는, 여과부(100)의 내부에 복수개의 유기막 여과기(110, 120, 130, 140)를 배치하여 원수에 포함된 오염물질을 제거하도록 유기막에 의해 여과하는 장치로서, 유기막에 오염물질이 농축될 경우 여과, 역세, 정지, 배출의 사이클의 빈번에 따른 시간이 필요하여 처리수의 회수율이 대략 원수의 85∼95%로 낮게 유지된다는 문제점이 있었다.1, a conventional water treatment apparatus includes a plurality of organic membrane filters 110, 120, 130, and 140 disposed inside a filtration unit 100 to remove contaminants contained in raw water, When the pollutant is concentrated in the organic film, it takes time for frequent cycles of filtration, backwash, stoppage and discharge, so that the recovery rate of the treated water is kept as low as about 85 to 95% of the raw water there was.

또한, 유기막 여과기에서 유기막에 의해 원수가 처리되고 잔류된 농축수에는 수산화나트륨(NaOH)이 함유되어 있기 때문에 침전이 안 되고 처리가 어렵다는 문제도 있었다.In addition, there is also a problem that it is difficult to perform the precipitation because the raw water is treated by the organic film in the organic membrane filter and the concentrated water contains sodium hydroxide (NaOH).

또한, 이러한 정수처리장치는 하천수, 호소수, 저수지수 등의 원수는 계절에 따라 온도와 탁도 등의 수질이 변경되고 그 성상의 변화가 크게 되므로, 유기막으로만 이루어진 여과수단에 의해서 정수처리가 어렵다는 문제도 있었다.In this water treatment apparatus, raw water such as river water, lake water, and reservoir water has a problem that the water quality such as temperature and turbidity is changed according to the season, There was also a problem.

대한민국 공개특허 제10-2012-0127805호 (2012년 11월 26일)Korean Patent Publication No. 10-2012-0127805 (November 26, 2012)

본 발명은 상기와 같은 종래의 문제점을 해소하기 위해 안출한 것으로서, 농축수의 처리를 용이하게 하는 동시에 원수의 회수율을 향상시킬 수 있는 원수와 농축수의 혼합식 정수처리장치를 제공하는 것을 그 목적으로 한다.Disclosure of the Invention The present invention has been made in order to solve the above conventional problems, and it is an object of the present invention to provide a mixed water treatment apparatus for raw water and concentrated water which can facilitate the treatment of concentrated water and improve the recovery rate of raw water. .

또한, 본 발명은 각각의 여과기에 원수를 균등하게 분배하여 여과부하를 감소시키는 동시에 여과속도를 향상시킬 수 있는 원수와 농축수의 혼합식 정수처리장치를 제공하는 것을 또 다른 목적으로 한다.Another object of the present invention is to provide a mixed water treatment apparatus for raw water and concentrated water which can distribute raw water evenly to each filter to reduce filtration load and improve filtration speed.

또한, 본 발명은 유기막 여과부와 무기막 여과부에 대한 원수의 분배량을 조절하여 원수와 농축수의 혼합비를 조절할 수 있는 원수와 농축수의 혼합식 정수처리장치를 제공하는 것을 또 다른 목적으로 한다.It is another object of the present invention to provide a mixed water treatment apparatus for raw water and concentrated water capable of controlling the mixing ratio of raw water and concentrated water by controlling the distribution amount of raw water to the organic membrane filtration unit and the inorganic membrane filtration unit, .

또한, 본 발명은 유기막 여과부와 무기막 여과부에 대한 원수와 농축수의 혼합량을 조절하여 원수와 농축수의 혼합비를 조절할 수 있는 원수와 농축수의 혼합식 정수처리장치를 제공하는 것을 또 다른 목적으로 한다.It is another object of the present invention to provide a mixed water treatment apparatus for raw water and concentrated water capable of controlling the mixing ratio of raw water and concentrated water by controlling the mixing amount of raw water and concentrated water for the organic membrane filtration unit and the inorganic membrane filtration unit For other purposes.

또한, 본 발명은 무기막 여과부에서 여과부하를 일정하게 유지하는 동시에 여과효율을 향상시킬 수 있는 원수와 농축수의 혼합식 정수처리장치를 제공하는 것을 또 다른 목적으로 한다.It is still another object of the present invention to provide a mixed water treatment apparatus of raw water and concentrated water capable of maintaining the filtration load constant in the inorganic membrane filtration unit and improving the filtration efficiency.

또한, 본 발명은 무기막 여과부에서 배출되는 배출수의 탁도를 유기막 여과부에서 배출되는 유출수의 탁도와 일정하게 유지하는 동시에 여과성능을 향상시킬 수 있는 원수와 농축수의 혼합식 정수처리장치를 제공하는 것을 또 다른 목적으로 한다.The present invention also relates to a mixed water treatment apparatus of raw water and concentrated water capable of improving the filtration performance while maintaining the turbidity of the effluent discharged from the inorganic membrane filtration unit constant with the turbidity of the effluent discharged from the organic membrane filtration unit Another purpose is to provide.

상기와 같은 목적을 달성하기 위한 본 발명은, 원수의 일부를 여과하는 하나 이상의 유기막 여과기로 이루어진 유기막 여과부(10); 원수의 잔부와, 상기 유기막 여과부(10)에 잔류된 농축수를 혼합하여 여과하는 무기막 여과부(20); 및 상기 무기막 여과부(20)의 상류에 설치되어 원수와 농축수의 혼합비를 조절하는 혼합조절부(30);를 포함하는 것을 특징으로 한다.According to an aspect of the present invention, there is provided an organic film filtering apparatus comprising: an organic membrane filtration unit including at least one organic membrane filter for filtering a part of raw water; An inorganic membrane filtration unit 20 for mixing and filtering the remainder of the raw water and the concentrated water remaining in the organic membrane filtration unit 10; And a mixing control unit 30 provided upstream of the inorganic membrane filtration unit 20 for controlling a mixing ratio of raw water and concentrated water.

본 발명의 상기 유기막 여과부(10)는, 원수를 균등하게 분배해서 처리하도록 복수개의 유기막 여과기가 병렬로 배치되어 있다. 본 발명의 상기 유기막 여과부(10)의 유기막 여과기와 상기 무기막 여과부(20)는, 원수를 균등하게 분배해서 처리하도록 병렬로 배치되어 있다.In the organic membrane filtration unit 10 of the present invention, a plurality of organic membrane filters are disposed in parallel so as to treat and distribute raw water evenly. The organic membrane filter of the organic membrane filtration unit 10 and the inorganic membrane filtration unit 20 of the present invention are arranged in parallel so as to treat and distribute raw water evenly.

본 발명의 상기 혼합조절부(30)는, 상기 유기막 여과부(10)의 상류와 상기 무기막 여과부(20)의 상류 사이에 설치되어 원수의 분배량을 조절하여 원수와 농축수의 혼합비를 조절하는 원수조절수단으로 이루어져 있다.The mixing control unit 30 of the present invention is provided between the upstream of the organic membrane filtration unit 10 and the upstream of the inorganic membrane filtration unit 20 to control the mixing amount of raw water and the mixing ratio of raw water and concentrated water And controlling the flow rate of the water.

본 발명의 상기 혼합조절부(30)는, 상기 유기막 여과부(10)의 하류와 상기 무기막 여과부(20)의 상류 사이에 설치되어 원수와 농축수의 혼합량을 조절하여 원수와 농축수의 혼합비를 조절하는 혼합조절수단으로 이루어져 있다.The mixing control unit 30 of the present invention is installed between the downstream of the organic membrane filtration unit 10 and the upstream of the inorganic membrane filtration unit 20 to regulate the mixing amount of the raw water and the concentrated water, And a mixing control means for controlling the mixing ratio of the mixture.

본 발명의 상기 혼합조절부(30)는, 원수와 농축수의 혼합비를 2:1∼4:1로 조절한다. 본 발명의 상기 원수의 탁도는 10∼100 NTU이고, 상기 농축수의 탁도는 100∼1000 NTU이다.In the mixing regulator 30 of the present invention, the mixing ratio of the raw water and the concentrated water is adjusted to 2: 1 to 4: 1. The turbidity of the raw water of the present invention is 10 to 100 NTU, and the turbidity of the concentrated water is 100 to 1000 NTU.

이상에서 살펴본 바와 같이, 본 발명은 원수를 유기막 여과부와 무기막 여과부로 분배하여 여과하고 유기막 여과부의 농축수와 원수를 혼합조절부에 의해 혼합비를 조절하여 여과함으로써, 농축수의 처리를 용이하게 하는 동시에 원수의 회수율을 향상시킬 수 있는 효과를 제공한다.As described above, according to the present invention, the raw water is distributed to the organic membrane filtration unit and the inorganic membrane filtration unit, filtered, and the concentrated water and the raw water in the organic membrane filtration unit are filtered by controlling the mixing ratio by the mixing control unit. And the recovery rate of the raw water can be improved.

또한, 복수개의 유기막 여과기와 무기막 여과부를 병렬로 배치함으로써, 각각의 여과기에 원수를 균등하게 분배하여 여과부하를 감소시키는 동시에 여과속도를 향상시킬 수 있게 된다.In addition, by arranging a plurality of organic film filters and inorganic film filtering portions in parallel, it is possible to distribute the raw water evenly to each filter, thereby reducing the filtration load and improving the filtration speed.

또한, 혼합조절부로서 원수조절수단을 사용함으로써, 유기막 여과부와 무기막 여과부에 대한 원수의 분배량을 조절하여 원수와 농축수의 혼합비를 조절할 수 있게 된다.Further, by using the raw water regulating means as the mixing regulating portion, it is possible to regulate the mixing ratio of the raw water and the concentrated water by controlling the distribution amount of the raw water to the organic membrane filtration portion and the inorganic membrane filtration portion.

또한, 혼합조절부로서 혼합조절수단을 사용함으로써, 유기막 여과부와 무기막 여과부에 대한 원수와 농축수의 혼합량을 조절하여 원수와 농축수의 혼합비를 조절할 수 있게 된다.Also, by using the mixing control means as the mixing control unit, it is possible to control the mixture ratio of the raw water and the concentrated water by controlling the mixing amount of the raw water and the concentrated water for the organic membrane filtration unit and the inorganic membrane filtration unit.

또한, 혼합조절부에서 원수와 농축수의 혼합비를 일정범위로 유지함으로써, 무기막 여과부에서 여과부하를 일정하게 유지하는 동시에 여과효율을 향상시킬 수 있게 된다.Also, by keeping the mixing ratio of the raw water and the concentrated water in the mixing regulating part within a certain range, the filtration efficiency can be improved while keeping the filtration load constant in the inorganic membrane filtration part.

또한, 원수와 농축수의 탁도를 일정범위로 유지함으로써, 무기막 여과부에서 배출되는 배출수의 탁도를 유기막 여과부에서 배출되는 유출수의 탁도와 일정하게 유지하는 동시에 여과성능을 향상시킬 수 있는 효과를 제공한다.Further, by maintaining the turbidity of the raw water and the concentrated water within a certain range, it is possible to maintain the turbidity of the effluent discharged from the inorganic membrane filtration section constantly with the turbidity of the effluent discharged from the organic membrane filtration section, Lt; / RTI >

도 1은 종래의 정수처리장치를 나타내는 구성도.
도 2는 본 발명의 일 실시예에 의한 원수와 농축수의 혼합식 정수처리장치를 나타내는 구성도.1 is a configuration diagram showing a conventional water treatment apparatus;
BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a mixed water treatment apparatus for raw water and concentrated water.

이하, 첨부도면을 참조하여 본 발명의 바람직한 일실시예를 더욱 상세히 설명한다. Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

도 2는 본 발명의 일 실시예에 의한 원수와 농축수의 혼합식 정수처리장치를 나타내는 구성도이다.2 is a configuration diagram showing a mixed water treatment apparatus for raw water and concentrated water according to an embodiment of the present invention.

도 2에 나타낸 바와 같이, 본 실시예의 원수와 농축수의 혼합식 정수처리장치는, 유기막 여과부(10), 무기막 여과부(20) 및 혼합조절부(30)를 포함하여 이루어져 원수와 농축수를 혼합하여 정수처리하는 원수와 농축수의 혼합식 정수처리장치이다.2, the mixed water treatment apparatus for raw water and concentrated water in this embodiment comprises an organic membrane filtration unit 10, an inorganic membrane filtration unit 20, and a mixing control unit 30, This is a mixed-type water treatment apparatus for mixing raw water and concentrated water mixed with concentrated water.

유기막 여과부(10)는, 원수의 일부를 여과하는 하나 이상의 유기막 여과기로 이루어진 여과수단으로서, 폴리비닐리덴디플루오리드막(PVDF memberane; polyvinylidenedifluoride memberane) 등과 같은 유기막을 사용하여 여과하는 유기막 여과기로 이루어져 있는 것이 바람직하다. The organic membrane filtration unit 10 is a filtration unit composed of at least one organic membrane filter for filtering a part of raw water and is an organic membrane filtration using an organic membrane such as polyvinylidene difluoride memberane (PVDF) Preferably a filter.

이러한 유기막 여과부(10)가 복수개의 유기막 여과기로 이루어진 경우에는, 원수를 균등하게 분배해서 처리하도록 복수개의 유기막 여과기가 병렬로 배치되어 있다.When the organic membrane filtration unit 10 is composed of a plurality of organic membrane filters, a plurality of organic membrane filters are arranged in parallel so as to uniformly distribute the raw water.

구체적으로, 유기막 여과부(10)가 제1 유기막 여과기(11), 제2 유기막 여과기(12), 제3 유기막 여과기(13), 제4 유기막 여과기(14)와 같이 4개의 유기막 여과기로 이루어진 경우에, 각각의 유기막 여과기가 병렬로 배치되어 원수를 균등하게 분배해서 처리하게 된다.Specifically, the organic membrane filtration unit 10 includes four organic membrane filters 11, 12, 13, and 14, as in the first organic membrane filter 11, the second organic membrane filter 12, the third organic membrane filter 13, In the case of the organic film filter, each organic film filter is disposed in parallel to uniformly distribute the raw water.

특히, 유기막 여과기는, 원수의 회수율이 대략 90%에 상당하므로, 유기막 여과부(10)로 유입된 원수의 90%는 유기막 여과기에 의해 여과된 유출수로 배출되고, 원수의 나머지 10%는 유기막 여과기의 내부에 농축수로 잔류하게 되어, 원수가 막여과 처리된 유출수의 유출관과 별도로 설치된 배출관을 통해 외부로 배출된다.Particularly, in the organic membrane filter, since the recovery rate of the raw water is approximately 90%, 90% of the raw water introduced into the organic membrane filtration unit 10 is discharged to the effluent filtered by the organic membrane filter, Remains as concentrated water in the organic membrane filter, and the raw water is discharged to the outside through a discharge pipe provided separately from the outflow pipe of the filtered effluent water.

무기막 여과부(20)는, 원수의 잔부와 유기막 여과부(10)에 잔류된 농축수를 혼합한 혼합수를 여과하는 여과수단으로서, 세라믹(ceramic) 등과 같은 무기막을 사용하여 여과하는 무기막 여과기로 이루어져 있는 것이 바람직하다. The inorganic membrane filtration unit 20 is a filtration means for filtering the mixed water obtained by mixing the remainder of the raw water and the concentrated water remaining in the organic membrane filtration unit 10 and uses inorganic membranes such as ceramics for filtration Membrane filter.

또한, 무기막 여과부(20)의 무기막 여과기는, 유기막 여과부(10)의 복수개의 유기막 여과기와 원수를 균등하게 분배해서 처리하도록 병렬로 배치되어 있는 것이 바람직하다.It is preferable that the inorganic membrane filter of the inorganic membrane filtration unit 20 is arranged in parallel so that the plurality of organic membrane filters of the organic membrane filtration unit 10 and the raw water are evenly distributed and processed.

특히, 무기막 여과기는, 원수의 회수율이 대략 96.5%에 상당하므로, 무기막 여과부(20)로 유입된 원수와 농축수의 혼합수의 96.5%는 무기막 여과기에 의해 여과된 유출수로 배출되고, 혼합수의 나머지 3.50%는 무기막 여과기의 내부에 농축수로 잔류하게 되어, 혼합수가 막여과 처리된 유출수의 유출관과 별도로 설치된 배출관을 통해 외부로 배출된다.Particularly, since the recovery rate of raw water in the inorganic membrane filter is approximately 96.5%, 96.5% of the mixed water of raw water and concentrated water introduced into the inorganic membrane filtration section 20 is discharged to the effluent filtered by the inorganic membrane filter And the remaining 3.50% of the mixed water remains as concentrated water in the inorganic membrane filter, and the mixed water is discharged to the outside through a discharge pipe separately provided from the outflow pipe of the filtered filtrate.

이러한 무기막 여과부(20)는 고탁도 저수온시 원수와 농축수의 투과 플럭스를 높게 올릴 수 있기 때문에, 원수의 전체적인 회수율을 높일 수 있고, 농축수의 침전효율도 향상시킬 수 있게 된다.The inorganic membrane filtration unit 20 can raise the permeate flux of raw water and concentrated water at a high turbidity water storage temperature, thereby increasing the overall recovery rate of the raw water and improving the precipitation efficiency of the concentrated water.

혼합조절부(30)는, 무기막 여과부(20)의 상류에 설치되어 원수와 농축수의 혼합비를 조절하는 조절수단으로서, 유기막 여과부(10)와 무기막 여과부(20)에 대한 원수의 분배량을 조절하는 원수조절수단(31)으로 이루어지거나, 원수와 농축수의 혼합량을 조절하는 혼합조절수단(32)으로 이루어져 있는 것이 바람직하다.The mixing control unit 30 is provided upstream of the inorganic membrane filtration unit 20 and regulates the mixing ratio of the raw water and the concentrated water so that the organic membrane filtration unit 10 and the inorganic membrane filtration unit 20 A raw water adjusting means 31 for adjusting the amount of raw water and a mixing adjusting means 32 for adjusting the mixing amount of the raw water and the concentrated water.

원수조절수단(31)은, 유기막 여과부(10)의 상류와 무기막 여과부(20)의 상류 사이에 설치된 유량밸브로 구성되어, 유기막 여과부(10)와 무기막 여과부(20)에 대한 원수의 분배량을 조절하여 원수와 농축수의 혼합비를 조절하게 된다.The raw water adjusting means 31 is constituted by a flow rate valve provided between the upstream of the organic membrane filtration unit 10 and the upstream of the inorganic membrane filtration unit 20 and the organic membrane filtration unit 10 and the inorganic membrane filtration unit 20 ) To control the mixing ratio of the raw water and the concentrated water.

혼합조절수단(32)은, 유기막 여과부(10)의 하류와 무기막 여과부(20)의 상류 사이에 설치된 유량밸브로 구성되어, 원수와 농축수의 혼합량을 조절하여 원수와 농축수의 혼합비를 조절하게 된다.The mixing control means 32 is constituted by a flow rate valve disposed between the downstream of the organic membrane filtration unit 10 and the upstream of the inorganic membrane filtration unit 20 to regulate the mixing amount of the raw water and the concentrated water, The mixing ratio is adjusted.

혼합조절부(30)에서 원수와 농축수의 부피에 대한 혼합비는 2:1∼4:1로 조절되는 것이 바람직하다. 그 이유는 원수와 농축수의 부피에 대한 혼합비가 2:1 보다 작으면 원수와 농축수의 혼합수에 대한 탁도가 증가되어 무기막 여과부(20)에서 여과부하가 증가하고 처리속도가 저하되고, 원수와 농축수의 부피에 대한 혼합비가 4:1 보다 크면 원수와 농축수의 혼합수에 대한 탁도가 감소되어 무기막 여과부(20)에서 여과부하가 감소하고 처리속도가 증가되지만 여과효율이 저하되기 때문이다.In the mixing regulator 30, the mixing ratio of the raw water to the concentrated water is preferably adjusted to 2: 1 to 4: 1. This is because if the mixing ratio of the raw water and the concentrated water to the volume is less than 2: 1, the turbidity with respect to the mixed water of the raw water and the concentrated water increases so that the filtration load increases in the inorganic membrane filtration part 20, If the mixing ratio of the raw water to the concentrated water is larger than 4: 1, the turbidity with respect to the mixed water of the raw water and the concentrated water is decreased, and the filtration load is reduced and the processing speed is increased in the inorganic membrane filtration part 20. However, .

아래의 표 1은 원수와 농축수의 혼합비에 따른 수질특성을 나타낸 것으로서, 정수장의 원수와 유기막 여과기에서 배출된 농축수와의 혼합비에 따른 혼합수의 수질특성을 각각의 항목별도 측정한 결과이다Table 1 below shows the water quality characteristics according to the mixing ratio of raw water and concentrated water. The water quality characteristics of the mixed water according to the mixing ratio of the raw water of the water purification plant and the concentrated water discharged from the organic membrane filter were separately measured


항목
Item 원수와 농축수의 혼합비(원수:농축수)Mix ratio of raw water and concentrated water (raw water: concentrated water) 2:12: 1 4:14: 1 6:16: 1 8:18: 1 수온(℃)Water temperature (℃) 19.519.5 20.420.4 18.618.6 18.818.8 pHpH 7.327.32 7.317.31 7.497.49 7.507.50 탁도(NTU)Turbidity (NTU) 33.3033.30 27.2127.21 20.2420.24 18.5618.56 UV254(1/㎝)UV 254 (1 / cm) 0.2030.203 0.1590.159 0.1460.146 0.1300.130 SS(㎎/ℓ)SS (mg / l) 8080 4040 3030 2020 TOC(㎎/ℓ)TOC (mg / l) 12.0812.08 10.2510.25 8.438.43 6.666.66 DOC(㎎/ℓ)DOC (mg / l) 2.662.66 2.112.11 2.292.29 1.981.98 Fe(㎎/ℓ)Fe (mg / l) 1.061.06 0.730.73 0.470.47 0.000.00 Mn(㎎/ℓ)Mn (mg / l) 1.401.40 0.300.30 0.000.00 0.000.00

또한, 무기막 여과부(20)에서 여과부하를 감소시키고 여과효율을 향상시켜 혼합수의 처리효율을 최적화하기 위해 원수와 농축수의 혼합비를 5:2로 유지하는 것이 더욱 바람직하다.It is more preferable to maintain the mixing ratio of the raw water and the concentrated water at 5: 2 in order to reduce the filtration load in the inorganic membrane filtration unit 20 and to improve the filtration efficiency and optimize the treatment efficiency of the mixed water.

이와 같이, 무기막 여과부(20)에서 혼합수의 여과부하를 감소시키고 여과효율을 향상시키기 위해, 원수의 탁도는 10∼100 NTU(Nephelo-metric Turbidity Unit)로 유지하고, 농축수의 탁도는 100∼1000 NTU로 유지하는 것이 바람직하다.The turbidity of the raw water is maintained at 10 to 100 NTU (Nephelo-metric Turbidity Unit) in order to reduce the filtration load of the mixed water in the inorganic membrane filtration unit 20 and improve the filtration efficiency, It is desirable to maintain the pressure at 100 to 1000 NTU.

그 이유는, 원수나 농축수의 탁도가 낮으면 혼합수의 탁도가 저하되어 무기막 여과부(20)에서 혼합수의 처리효율이 저하되고, 원수나 농축수의 탁도가 높으면 혼합수의 탁도가 증가되어 무기막 여과부(20)에서 혼합수의 처리부하가 증가하기 때문이다. If the turbidity of the raw water or the concentrated water is low, the turbidity of the mixed water is lowered and the treatment efficiency of the mixed water is lowered in the inorganic membrane filtration part 20. If the turbidity of the raw water or the concentrated water is high, This is because the treatment load of mixed water in the inorganic membrane filtration unit 20 is increased.

따라서, 혼합조절부(30)는 무기막 여과부(20)에서 원수와 농축수의 혼합수에 대한 처리효율을 최적화하기 위해 혼합수의 탁도를 35.7∼357 NTU로 유지하는 것이 더욱 바람직하다.Therefore, it is more preferable that the turbidity of the mixed water is maintained at 35.7 to 357 NTU in order to optimize the treatment efficiency with respect to the mixed water of the raw water and the concentrated water in the inorganic membrane filtration unit 20.

이하, 도 2를 참조하여 본 실시예의 원수와 농축수의 혼합식 정수처리장치의 작동예를 구체적으로 설명한다.Hereinafter, with reference to FIG. 2, an operation example of the mixed water treatment apparatus of raw water and concentrated water of the present embodiment will be described in detail.

본 실시예의 원수와 농축수의 혼합식 정수처리장치에 100ℓ의 원수를 투입하여 정수처리하는 경우에, 혼합조절부(30)의 원수조절수단(31)에 의해 유기막 여과부(10)에 80ℓ의 원수를 공급하고 무기막 여과부(20)에 20ℓ의 원수를 공급하게 된다.The raw water adjusting unit 31 of the mixing control unit 30 controls the organic membrane filtration unit 10 to supply 80 liters of purified water to the mixed water treatment apparatus of the present embodiment, And 20 L of raw water is supplied to the inorganic membrane filtration unit 20.

그러면, 제1 내지 제4 유기막 여과기(11, 12, 13, 14)에서 각각 20ℓ의 원수를 여과하게 되며 유기막 여과기의 회수율이 대략 90%에 상당하므로, 각각 18ℓ의 유출수를 배출하여 유기막 여과부(10)에서 총 72ℓ의 유출수를 배출하게 되고, 각각 2ℓ의 농축수를 잔류시켜 유기막 여과부(10)에서 총 8ℓ의 농축수를 무기막 여과부(20)로 배출하게 된다.Then, each of the first to fourth organic membrane filters 11, 12, 13 and 14 filters 20 L of raw water and the recovery rate of the organic membrane filter is about 90%. Thus, A total of 72 liters of concentrated water is left in the filtration unit 10, and a total of 8 liters of concentrated water is discharged to the inorganic membrane filtration unit 20 from the organic membrane filtration unit 10.

무기막 여과부(20)에서는 20ℓ의 원수와 8ℓ의 농축수를 혼합하여 총 28ℓ의 혼합수를 여과하게 되며 무기막 여과기의 회수율이 대략 96.5%에 상당하므로, 27ℓ의 유출수를 배출하게 되고 1ℓ의 농축수를 잔류시켜 외부로 배출하게 된다.In the inorganic membrane filtration unit 20, 20 liters of raw water and 8 liters of concentrated water are mixed to filter a total of 28 liters of mixed water. Since the recovery rate of the inorganic membrane filter is equivalent to approximately 96.5%, 27 liters of effluent is discharged. The concentrated water remains and is discharged to the outside.

따라서, 본 실시예의 원수와 농축수의 혼합식 정수처리장치는, 유기막 여과부(10)에서 원수의 72%를 유출수로 회수하고 무기막 여과부(20)에서 원수의 27%를 유출수로 회수하게 되므로, 전체적으로 원수의 99%를 유출수로 회수하게 된다.Therefore, in the mixed water treatment apparatus of the present embodiment, 72% of the raw water is recovered as effluent in the organic membrane filtration unit 10, 27% of the raw water is recovered as effluent in the inorganic membrane filtration unit 20 So that 99% of the raw water is recovered as effluent as a whole.

이상 설명한 바와 같이, 본 발명에 따르면 원수를 유기막 여과부와 무기막 여과부로 분배하여 여과하고 유기막 여과부의 농축수와 원수를 혼합조절부에 의해 혼합비를 조절하여 여과함으로써, 농축수의 처리를 용이하게 하는 동시에 원수의 회수율을 향상시킬 수 있는 효과를 제공한다.As described above, according to the present invention, the raw water is distributed to the organic membrane filtration unit and the inorganic membrane filtration unit, filtered, and the concentrated water and the raw water of the organic membrane filtration unit are filtered by controlling the mixing ratio by the mixing control unit. And the recovery rate of the raw water can be improved.

또한, 복수개의 유기막 여과기와 무기막 여과부를 병렬로 배치함으로써, 각각의 여과기에 원수를 균등하게 분배하여 여과부하를 감소시키는 동시에 여과속도를 향상시킬 수 있게 된다.In addition, by arranging a plurality of organic film filters and inorganic film filtering portions in parallel, it is possible to distribute the raw water evenly to each filter, thereby reducing the filtration load and improving the filtration speed.

또한, 혼합조절부로서 원수조절수단을 사용함으로써, 유기막 여과부와 무기막 여과부에 대한 원수의 분배량을 조절하여 원수와 농축수의 혼합비를 조절할 수 있게 된다.Further, by using the raw water regulating means as the mixing regulating portion, it is possible to regulate the mixing ratio of the raw water and the concentrated water by controlling the distribution amount of the raw water to the organic membrane filtration portion and the inorganic membrane filtration portion.

또한, 혼합조절부로서 혼합조절수단을 사용함으로써, 유기막 여과부와 무기막 여과부에 대한 원수와 농축수의 혼합량을 조절하여 원수와 농축수의 혼합비를 조절할 수 있게 된다.Also, by using the mixing control means as the mixing control unit, it is possible to control the mixture ratio of the raw water and the concentrated water by controlling the mixing amount of the raw water and the concentrated water for the organic membrane filtration unit and the inorganic membrane filtration unit.

또한, 혼합조절부에서 원수와 농축수의 혼합비를 일정범위로 유지함으로써, 무기막 여과부에서 여과부하를 일정하게 유지하는 동시에 여과효율을 향상시킬 수 있게 된다.Also, by keeping the mixing ratio of the raw water and the concentrated water in the mixing regulating part within a certain range, the filtration efficiency can be improved while keeping the filtration load constant in the inorganic membrane filtration part.

또한, 원수와 농축수의 탁도를 일정범위로 유지함으로써, 무기막 여과부에서 배출되는 배출수의 탁도를 유기막 여과부에서 배출되는 유출수의 탁도와 일정하게 유지하는 동시에 여과성능을 향상시킬 수 있는 효과를 제공한다.Further, by maintaining the turbidity of the raw water and the concentrated water within a certain range, it is possible to maintain the turbidity of the effluent discharged from the inorganic membrane filtration section constantly with the turbidity of the effluent discharged from the organic membrane filtration section, Lt; / RTI >

이상 설명한 본 발명은 그 기술적 사상 또는 주요한 특징으로부터 벗어남이 없이 다른 여러 가지 형태로 실시될 수 있다. 따라서 상기 실시예는 모든 점에서 단순한 예시에 지나지 않으며 한정적으로 해석되어서는 안 된다. The present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. Therefore, the above embodiments are merely illustrative in all respects and should not be construed as limiting.

10: 유기막 여과부
20: 무기막 여과부
30: 혼합조절부10: organic membrane filtration section
20: inorganic membrane filtration part
30:

Claims (7)

원수의 일부를 여과하는 하나 이상의 유기막 여과기로 이루어진 유기막 여과부(10);
원수의 잔부와, 상기 유기막 여과부(10)에 잔류된 농축수를 혼합하여 여과하는 무기막 여과부(20); 및
상기 무기막 여과부(20)의 상류에 설치되어 원수와 농축수의 혼합비를 조절하는 혼합조절부(30);를 포함하는 것을 특징으로 하는 원수와 농축수의 혼합식 정수처리장치.An organic membrane filtration unit 10 comprising at least one organic membrane filter for filtering a part of raw water;
An inorganic membrane filtration unit 20 for mixing and filtering the remainder of the raw water and the concentrated water remaining in the organic membrane filtration unit 10; And
And a mixing control part (30) provided upstream of the inorganic membrane filtration part (20) for controlling a mixing ratio of raw water and concentrated water. 제 1 항에 있어서,
상기 유기막 여과부(10)는, 원수를 균등하게 분배해서 처리하도록 복수개의 유기막 여과기가 병렬로 배치되어 있는 것을 특징으로 하는 원수와 농축수의 혼합식 정수처리장치.The method according to claim 1,
Characterized in that the organic membrane filtration unit (10) has a plurality of organic membrane filters arranged in parallel for evenly distributing raw water. 제 1 항에 있어서,
상기 유기막 여과부(10)의 유기막 여과기와 상기 무기막 여과부(20)는, 원수를 균등하게 분배해서 처리하도록 병렬로 배치되어 있는 것을 특징으로 하는 원수와 농축수의 혼합식 정수처리장치.The method according to claim 1,
Characterized in that the organic membrane filter of the organic membrane filtration unit (10) and the inorganic membrane filtration unit (20) are arranged in parallel so as to treat and distribute raw water evenly. . 제 1 항에 있어서,
상기 혼합조절부(30)는, 상기 유기막 여과부(10)의 상류와 상기 무기막 여과부(20)의 상류 사이에 설치되어 원수의 분배량을 조절하여 원수와 농축수의 혼합비를 조절하는 원수조절수단으로 이루어져 있는 것을 특징으로 하는 원수와 농축수의 혼합식 정수처리장치.The method according to claim 1,
The mixing control unit 30 is installed between the upstream of the organic membrane filtration unit 10 and the upstream of the inorganic membrane filtration unit 20 to control the mixing ratio of the raw water and the concentrated water by controlling the distribution amount of the raw water Wherein the raw water and the concentrated water are mixed with each other. 제 1 항에 있어서,
상기 혼합조절부(30)는, 상기 유기막 여과부(10)의 하류와 상기 무기막 여과부(20)의 상류 사이에 설치되어 원수와 농축수의 혼합량을 조절하여 원수와 농축수의 혼합비를 조절하는 혼합조절수단으로 이루어져 있는 것을 특징으로 하는 원수와 농축수의 혼합식 정수처리장치.The method according to claim 1,
The mixing control unit 30 is installed between the downstream of the organic membrane filtration unit 10 and the upstream of the inorganic membrane filtration unit 20 and controls the mixing ratio of the raw water and the concentrated water to adjust the mixing ratio of the raw water and the concentrated water And a mixing control means for controlling the mixing of the raw water and the concentrated water. 제 1 항에 있어서,
상기 혼합조절부(30)는, 원수와 농축수의 부피에 대한 혼합비를 2:1∼4:1로 조절하는 것을 특징으로 하는 원수와 농축수의 혼합식 정수처리장치.The method according to claim 1,
Wherein the mixing control unit (30) adjusts the mixing ratio of the raw water and the concentrated water to a volume ratio of 2: 1 to 4: 1. 제 1 항에 있어서,
상기 원수의 탁도는 10∼100 NTU이고, 상기 농축수의 탁도는 100∼1000 NTU인 것을 특징으로 하는 원수와 농축수의 혼합식 정수처리장치.The method according to claim 1,
Wherein the turbidity of the raw water is 10 to 100 NTU and the turbidity of the concentrated water is 100 to 1000 NTU.
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KR102307286B1 (en) 2020-12-04 2021-09-30 경일워터이엔지 주식회사 Apparatus for treating concentrated water of reverse osmosis equipment
KR20230007857A (en) 2021-07-06 2023-01-13 주식회사 포스코건설 Water treatment apparatus for equally distributing influent flow
KR102584871B1 (en) 2022-08-24 2023-10-04 경일워터이엔지 주식회사 Apparatus for treating concentrated water of water treatment facility

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KR102307286B1 (en) 2020-12-04 2021-09-30 경일워터이엔지 주식회사 Apparatus for treating concentrated water of reverse osmosis equipment
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