JP2010000466A - Desalting method for salt-containing water, and device therefor - Google Patents

Desalting method for salt-containing water, and device therefor Download PDF

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JP2010000466A
JP2010000466A JP2008162624A JP2008162624A JP2010000466A JP 2010000466 A JP2010000466 A JP 2010000466A JP 2008162624 A JP2008162624 A JP 2008162624A JP 2008162624 A JP2008162624 A JP 2008162624A JP 2010000466 A JP2010000466 A JP 2010000466A
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reverse osmosis
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osmosis membrane
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JP4977652B2 (en
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Nobuyuki Kondo
信行 近藤
Hideaki Hashimoto
秀昭 橋本
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    • 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
    • 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
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/30—Wastewater or sewage treatment systems using renewable energies
    • Y02W10/37—Wastewater or sewage treatment systems using renewable energies using solar energy

Abstract

<P>PROBLEM TO BE SOLVED: To provide effective pretreatment method and device in a desalting system or method utilizing a reverse osmosis membrane module, and to provide a fresh water feed system or method which can reply to various standards, regulations or requirements. <P>SOLUTION: Disclosed are: a desalting method where, when salt-containing water is subjected to desalting treatment with a reverse osmosis membrane module, so as to be fresh water, as pretreatment, the salt-containing water is subjected to ozone treatment, is next subjected to electrolytic treatment and is fed to the reverse osmosis membrane module; a device used therefor; a desalting method where a mineral component is added to the fresh water subjected to the desalting treatment with the reverse osmosis membrane module; and a device used therefor. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、海水等の塩類含有水を飲料用水、農業用水、あるいは工業用水等に淡水化する方法、及びそのための装置に関する。 The present invention relates to a method for desalinating salt-containing water such as seawater into drinking water, agricultural water, industrial water, or the like, and an apparatus therefor.

現在、海水等の淡水化、純水の製造、廃水処理等の様々な分野の水処理システムにおいて、逆浸透膜モジュールを利用した技術が広く採用されている（例えば、特許文献１〜６参照）。淡水化の手順としては、例えば、海水の淡水化の場合は、微生物による逆浸透膜の汚れを防止するために、取水した海水に塩素を注入後、濾過器等を通し、硫酸によるｐＨ調節を行う等の前処理工程を経てから逆浸透膜へ供給する方法が一般的に行われる。逆浸透膜としてポリアミド系等の塩素による酸化劣化を受けやすい逆浸透膜を使用するときには、還元剤（重亜硫酸ナトリウム等）を添加し供給海水中の残留塩素を完全に除去するという前処理も必要となる（例えば、特許文献１）。塩素による酸化劣化の生じにくい膜として、三酢酸セルロース逆浸透膜も用いられている（例えば、特許文献２参照）。逆浸透膜モジュールで処理された水は、その後必要に応じて、更にｐＨ調節や殺菌処理が行われて目的の淡水とされる。
特開平７−３０８６７１号公報 特開平７−１７１５６５号公報 特開平５−３０５２９８号公報 特開平９−２２０５６３号公報 特開２００７−２６８３５２号公報 特開２００７−２６０６３８号公報 Currently, technologies using reverse osmosis membrane modules are widely adopted in water treatment systems in various fields such as desalination of seawater and the like, production of pure water, and wastewater treatment (see, for example, Patent Documents 1 to 6). . As a desalination procedure, for example, in the case of desalination of seawater, in order to prevent contamination of the reverse osmosis membrane by microorganisms, after injecting chlorine into the seawater taken, the pH is adjusted with sulfuric acid through a filter or the like. A method of supplying to a reverse osmosis membrane is generally performed after a pretreatment step such as performing. When using a reverse osmosis membrane that is susceptible to oxidative degradation due to chlorine, such as polyamide, a pretreatment is necessary to completely remove residual chlorine in the supplied seawater by adding a reducing agent (such as sodium bisulfite). (For example, Patent Document 1). A cellulose triacetate reverse osmosis membrane is also used as a membrane that hardly undergoes oxidative degradation due to chlorine (see, for example, Patent Document 2). Thereafter, the water treated by the reverse osmosis membrane module is further subjected to pH adjustment and sterilization treatment as necessary to obtain the desired fresh water.
JP-A-7-308671 JP 7-171565 A JP-A-5-305298 JP-A-9-220563 JP 2007-268352 A JP 2007-260638 A

しかしながら、塩類含有水の中には有機物を多く含む水や、塩類濃度が特に高い水等もあり、そのような水を従来の前処理のみで逆浸透膜モジュールに供給すると、逆浸透膜が目詰まりしたり、逆浸透膜に過大な負荷がかかるという問題が発生する。一方、逆浸透膜モジュールで処理された水は、通常、塩化ナトリウムや塩化マグネシウムや塩化カルシウムを主体とするミネラル成分の含有量が極端に低下するので、処理水の利用目的によっては、更に成分の調整等が必要になる場合がある。例えば、飲料水の水質基準は国によって異なるため、国によっては、逆浸透膜モジュールで処理された水をそのまま飲料水として利用することができないという問題がある。 However, some salt-containing water includes water containing a large amount of organic substances and water having a particularly high salt concentration. If such water is supplied to the reverse osmosis membrane module only by conventional pretreatment, the reverse osmosis membrane is the target. Problems such as clogging and excessive load on the reverse osmosis membrane occur. On the other hand, water treated with a reverse osmosis membrane module usually has an extremely low content of mineral components mainly consisting of sodium chloride, magnesium chloride and calcium chloride. Adjustments may be necessary. For example, since the water quality standards for drinking water differ from country to country, there is a problem in some countries that water treated with a reverse osmosis membrane module cannot be used as it is as drinking water.

本発明の課題の一つは、逆浸透膜モジュールを利用した淡水化システム又は方法において、逆浸透膜モジュールの処理の前処理工程において、対象とする処理水中の有機物を分解させ逆浸透膜の目詰まりを防止し、また、処理水の塩分濃度を低下させることによって逆浸透膜の負荷を減らすことにある。そして、二つ目の課題は、各種の基準・規制又は要求に答えることのできる、淡水の供給システム（装置）又は方法を提供することにある。 One of the objects of the present invention is a desalination system or method using a reverse osmosis membrane module. In the pretreatment step of the treatment of the reverse osmosis membrane module, the organic matter in the treated water is decomposed and the reverse osmosis membrane eye is removed. The object is to reduce the load on the reverse osmosis membrane by preventing clogging and reducing the salt concentration of the treated water. And the 2nd subject is providing the supply system (apparatus) or method of fresh water which can answer various standards, regulations, or a demand.

本発明の課題は、本発明の以下の態様によって解決できる。即ち、本発明の請求項１に記載された発明は、塩類含有水を逆浸透膜モジュールにより脱塩処理して淡水化するに際し、先ず、塩類含有水をオゾン処理し、次いで電解処理した後、逆浸透膜モジュールに供給することを特徴とする塩類含有水の淡水化方法である。 The problems of the present invention can be solved by the following aspects of the present invention. That is, in the invention described in claim 1 of the present invention, when desalinating salt-containing water with a reverse osmosis membrane module to desalinate, first, the salt-containing water is subjected to ozone treatment, and then subjected to electrolytic treatment. A salt-containing water desalination method characterized by being supplied to a reverse osmosis membrane module.

請求項２に記載された発明は、逆浸透膜モジュールにより脱塩処理された淡水に、ミネラル成分を添加することを特徴とする請求項１記載の塩類含有水の淡水化方法である。 The invention described in claim 2 is the method of desalinating salt-containing water according to claim 1, wherein a mineral component is added to the fresh water desalted by the reverse osmosis membrane module.

請求項３に記載された発明は、ミネラル成分として、塩化ナトリウムと塩化マグネシウムと塩化カルシウムを主体とするミネラルを用い、２０〜５００ｍｇ／ｌ量添加することを特徴とする請求項２記載の塩類含有水の淡水化方法である。特に好ましくは５０〜２００ｍｇ／ｌ量添加するのがよい。 The invention described in claim 3 uses a mineral mainly composed of sodium chloride, magnesium chloride, and calcium chloride as a mineral component, and adds 20 to 500 mg / l in an amount of salt according to claim 2 This is a method for desalinating water. It is particularly preferable to add 50 to 200 mg / l.

請求項４に記載された発明は、ミネラル成分として、逆浸透膜モジュールにより脱塩処理された淡水を、微量のラジウムを含む風化した粒状花崗岩層を通過させることによって得られる、粒状花崗岩の浸漬水を用い、この浸漬水がミネラル成分量として２０〜５００ｍｇ／ｌ量添加されるものであることを特徴とする請求項２記載の塩類含有水の淡水化方法
である。ミネラル成分量としては、５０〜２００ｍｇ／ｌ量添加するのが特に好ましい。粒状花崗岩の浸漬水は、０．０５〜１．０ｇ／ｌ程度添加すれば、前記ミネラル濃度に調節できる。 The invention described in claim 4 is a granulated granite immersion water obtained by passing fresh water desalted by a reverse osmosis membrane module as a mineral component through a weathered granular granite layer containing a small amount of radium. The salt-containing water desalination method according to claim 2, wherein the immersion water is added in an amount of 20 to 500 mg / l as a mineral component amount. As the mineral component amount, it is particularly preferable to add 50 to 200 mg / l. The granular granite immersion water can be adjusted to the mineral concentration by adding about 0.05 to 1.0 g / l.

請求項５記載の発明は、塩類含有水をオゾン処理するためのオゾン処理装置、オゾン処理された水を電解処理するための電解処理装置、及び逆浸透膜モジュールからなる脱塩処理装置を構成要素として含む塩類含有水を淡水化するための装置である。 The invention according to claim 5 is a constituent element of an ozone treatment device for ozone treatment of salt-containing water, an electrolytic treatment device for electrolytic treatment of ozone-treated water, and a desalination treatment device comprising a reverse osmosis membrane module It is an apparatus for desalinating the salt-containing water contained as.

そして、請求項６に記載された発明は、逆浸透膜モジュールにより脱塩処理された淡水に、ミネラル成分を添加するためのミネラル成分添加装置を構成要素として含む請求項５記載の塩類含有水を淡水化するための装置である。 And the invention described in Claim 6 contains the salt-containing water of Claim 5 which contains the mineral component addition apparatus for adding a mineral component to the fresh water desalted by the reverse osmosis membrane module as a component. It is a device for desalination.

本発明によれば、基本的に逆浸透膜モジュールを利用した淡水化技術であって、逆浸透膜モジュールの処理の前処理工程において、対象とする処理水中の有機物を、オゾン処理によって分解させ逆浸透膜の目詰まりを防止し、また、処理水の塩分濃度を、電解処理により低下させることによって逆浸透膜の負荷を減らす方法又は装置が提供される。また、逆浸透膜処理された水を、各種の基準・規制又は要求に適切に対応させることのできる、淡水の供給システム（装置）又は方法が提供される。 According to the present invention, it is basically a desalination technique using a reverse osmosis membrane module, and in the pretreatment process of the reverse osmosis membrane module, the organic matter in the target treated water is decomposed by ozone treatment and reversed. A method or apparatus is provided that prevents clogging of the osmotic membrane and reduces the load on the reverse osmosis membrane by reducing the salinity of the treated water by electrolytic treatment. In addition, a fresh water supply system (apparatus) or method capable of appropriately responding to various standards / regulations or requirements for water treated with a reverse osmosis membrane is provided.

本発明は、塩類含有水を逆浸透膜モジュールにより脱塩処理して淡水化するに際し、前処理工程として、塩類含有水のオゾン処理工程、そして次に、電解処理工程を実施し、その後、前処理水を逆浸透膜モジュールに供給することからなる塩類含有水の淡水化方法である。本発明において淡水とは、飲料水、農業用水、工業用水等の塩類の含有量が少ない水を意味し、硬度２０００程度の硬水も含む概念として定義される。また、塩類含有水とは、典型的には海水（塩類の含有量が約３．５％）であるが、飲料水や農業用水や工業用水としてそのまま利用することのできない塩類含有量の高い水、あるいは塩類以外に有機物を多く含んでいる水であってもよい。 In the present invention, when salt-containing water is desalted by a reverse osmosis membrane module to be desalinated, an ozone treatment step of salt-containing water and then an electrolytic treatment step are carried out as a pretreatment step. A method for desalinating salt-containing water comprising supplying treated water to a reverse osmosis membrane module. In the present invention, fresh water means water having a low salt content, such as drinking water, agricultural water, and industrial water, and is defined as a concept including hard water having a hardness of about 2000. The salt-containing water is typically seawater (the salt content is about 3.5%), but water with a high salt content that cannot be used as it is as drinking water, agricultural water, or industrial water. Alternatively, water containing a large amount of organic substances other than salts may be used.

逆浸透膜モジュールにより脱塩処理するシステム・方法は、いわゆるＲＯ膜やＵＦ膜やＮＦ膜を用い逆浸透の原理を利用して塩類を除去するものであり、色々のタイプのものが知られている。本発明においては、公知のいずれの逆浸透膜モジュールでも用いることができる。また、逆浸透膜モジュールによる脱塩処理工程の前処理として、本発明の前処理以外の、通常行われる前処理、例えば、海水等の塩素殺菌や濾過等の操作を行ってもかまわない。逆浸透膜モジュール処理においては、塩化ナトリウム、塩化マグネシウム、塩化カルシウム等の塩類が除去されるだけでなく、殆どの細菌やウイルスも除去される。通常、塩類の濃度は１００ｐｐｍ（０．０１％）以下までに除去される。なお、日本の飲料水基準は、塩分濃度が０．０１％以下（いわゆる軟水）とされているが、これは国によって異なる。 The system and method for desalinating with a reverse osmosis membrane module is to remove salts using the principle of reverse osmosis using a so-called RO membrane, UF membrane or NF membrane, and various types are known. Yes. In the present invention, any known reverse osmosis membrane module can be used. In addition, as a pretreatment of the desalination treatment step by the reverse osmosis membrane module, a pretreatment that is usually performed other than the pretreatment of the present invention, for example, operations such as chlorine sterilization of seawater or filtration may be performed. In the reverse osmosis membrane module treatment, not only salts such as sodium chloride, magnesium chloride and calcium chloride are removed, but also most bacteria and viruses are removed. Usually, the salt concentration is removed to 100 ppm (0.01%) or less. In Japan, the standard for drinking water is 0.01% or less (so-called soft water), which varies depending on the country.

本発明においては、先ず、取水された塩類含有水は、オゾン処理される。オゾン処理によって、水中に含まれる有機物が分解され、逆浸透膜を汚染したり目詰まりさせたりすることがなく、逆浸透膜処理によって取り除かれるようになる。また、オゾンによる殺菌も行われる。オゾンによる殺菌や分解方法・装置は特別なものである必要はなく、公知の方法・装置を通常の条件下で使用すればよい。 In the present invention, first, the salt-containing water taken is subjected to ozone treatment. By the ozone treatment, organic substances contained in the water are decomposed and are removed by the reverse osmosis membrane treatment without contaminating or clogging the reverse osmosis membrane. In addition, sterilization with ozone is also performed. The ozone sterilization and decomposition method / apparatus need not be special, and a known method / apparatus may be used under normal conditions.

本発明においては、オゾン処理された水は、次に電解処理される。塩類、例えば、食塩水の電解反応により次亜塩素酸を発生させ、殺菌を行う方法は公知である。例えば、食塩水中で白金やチタン等の電極を用い電解反応を行うと、処理時間２０〜６０分で完全に殺菌が行われる。この原理は、次のように説明される。食塩水の電解で陽極に塩素が発生し、この塩素は溶液のｐHによってその形態が変化し、酸性領域では塩素（Cl2）、中性領域では次亜塩素（HClO）、次亜塩素酸イオン（ClO−）が主成分となる。
酸性領域においては、塩素（Cl2）の一部は溶液に溶解するものの大部分は塩素ガスとして系外に排出さる。そして、溶液中に存在する塩素（Cl2）、中性領域では次亜塩素（HClO）、次亜塩素酸イオンが、微生物やウイルス等の殺菌に寄与するものである。本発明の電解処理では、前記のような殺菌が行われる他、電気分解によって塩濃度が低下するので、その後の逆浸透膜による処理において、逆浸透膜に与える負荷を大幅に低下させることができる。電解の条件は特に制限されるものではなく、状況に応じ任意に設定することができる。 In the present invention, the ozone-treated water is then subjected to electrolytic treatment. A method of generating sterilization by generating hypochlorous acid by an electrolytic reaction of a salt solution such as saline is known. For example, when an electrolytic reaction is performed using an electrode such as platinum or titanium in saline, sterilization is completely performed in a treatment time of 20 to 60 minutes. This principle is explained as follows. Chlorine is generated at the anode by electrolysis of salt water, and the form of this chlorine changes depending on the pH of the solution. In the acidic region, chlorine (Cl 2 ), in the neutral region, hypochlorite (HClO), hypochlorite ion (ClO − ) is the main component.
In the acidic region, a part of chlorine (Cl 2 ) is dissolved in the solution, but most is discharged out of the system as chlorine gas. Chlorine (Cl 2 ) present in the solution, hypochlorite (HClO), and hypochlorite ions in the neutral region contribute to sterilization of microorganisms and viruses. In the electrolytic treatment of the present invention, in addition to the sterilization as described above, since the salt concentration is reduced by electrolysis, the load applied to the reverse osmosis membrane can be greatly reduced in the subsequent treatment with the reverse osmosis membrane. . The electrolysis conditions are not particularly limited, and can be arbitrarily set according to the situation.

本発明においては、前記のごとく電解処理された水が逆浸透膜モジュールに供給され、脱塩処理されて淡水化される。逆浸透膜モジュールによる処理は、特に限定されるものではなく、公知の装置を用いて通常の条件下で処理を行えばよい。そして、淡水化された水はそのまま、各種用途に使用することができる。 In the present invention, the electrolyzed water as described above is supplied to the reverse osmosis membrane module, desalted and desalinated. The treatment by the reverse osmosis membrane module is not particularly limited, and the treatment may be performed under normal conditions using a known apparatus. The desalinated water can be used for various purposes as it is.

本発明においては、また、前記のごとくして得られた淡水に、ミネラル成分を添加してもよい。本発明においてミネラル成分とは、塩化ナトリウムや塩化マグネシウムや塩化カルシウムを主体とするものを意味する。添加方法や混合方法は特に限定されるものではなく、また、ミネラル成分は固形粉末として添加混合しても、あるいは水溶液として添加混合してもよい。あるいは、逆浸透膜モジュール処理された水を、ミネラル成分含有層を通過させることによって、ミネラル成分を溶出・溶解させる方法によってもよい。添加量は得られた淡水の利用目的・用途によって調整されるが、通常、２０〜５００ｍｇ／ｌ、特に５０〜２００ｍｇ／ｌ量の範囲が好ましい。 In the present invention, a mineral component may be added to the fresh water obtained as described above. In the present invention, the mineral component means a substance mainly composed of sodium chloride, magnesium chloride or calcium chloride. The addition method and the mixing method are not particularly limited, and the mineral component may be added and mixed as a solid powder or added and mixed as an aqueous solution. Alternatively, the water treated with the reverse osmosis membrane module may be passed through the mineral component-containing layer to elute and dissolve the mineral component. The addition amount is adjusted depending on the purpose and application of the obtained fresh water, but is usually in the range of 20 to 500 mg / l, particularly 50 to 200 mg / l.

本発明において用いられるミネラル成分を添加する方法としては、実用新案登録第３１３２８２１号に記載された装置を利用するのが、特に好ましい。具体的には、前記逆浸透膜処理された水を、微量のラジウムを含む風化した粒状花崗岩層を通過させることによって、特に飲料用水として適した淡水を得ることができる。なお、ラジウムを含む風化した花崗岩としては、海底火山で生成されたものが、太平洋プレートで陸地化してから６００万年以上経過したものを使用することができる。この風化した花崗岩は、石英、長石、雲母が大豆粒以下に壊れているので、スコップで採取することができる。採取してから篩にかけ、大豆粒のものだけをフィルターとして充填・利用することができる。本発明においては、前記のごとき粒状花崗岩の浸漬水を、ミネラル成分量として２０〜５００ｍｇ／ｌ量、特に５０〜２００ｍｇ／ｌ量添加することによっても目的とする淡水が得られる。粒状花崗岩の浸漬水は、０．０５〜１．０ｇ／ｌ程度添加すれば、前記ミネラル濃度に調節できる。 As a method of adding the mineral component used in the present invention, it is particularly preferable to use an apparatus described in Utility Model Registration No. 3132721. Specifically, fresh water particularly suitable as drinking water can be obtained by passing the water subjected to the reverse osmosis membrane treatment through a weathered granular granite layer containing a small amount of radium. In addition, as the weathered granite containing radium, it is possible to use the one produced more than 6 million years after the one produced by the submarine volcano has landed on the Pacific plate. This weathered granite can be collected with a scoop because quartz, feldspar, and mica are broken below the soybean grain. It can be collected and sieved, and only soybean grains can be filled and used as a filter. In the present invention, the target fresh water can also be obtained by adding 20 to 500 mg / l, particularly 50 to 200 mg / l of the granulated granite immersion water as described above. The granular granite immersion water can be adjusted to the mineral concentration by adding about 0.05 to 1.0 g / l.

前記したような本発明の淡水化方法を実施するためには、塩類含有水をオゾン処理するためのオゾン処理装置、オゾン処理された水を電解処理するための電解処理装置、及び逆浸透膜モジュールからなる脱塩処理装置を構成要素として含む塩類含有水を淡水化するための装置を用いることができる。また、必要に応じ、逆浸透膜モジュールにより脱塩処理された淡水に、ミネラル成分を添加するためのミネラル成分添加装置を、付加的な構成要素として組合わせて用いることもできる。これら一連の製造装置は本発明のもう一つの態様であるが、オゾン処理装置、電解処理装置、逆浸透膜モジュールからなる脱塩処理装置、及びミネラル成分添加装置等の個々の装置自体は、特別なものである必要はなく、公知のものをそのまま、あるいは当業者が行う通常の設計事項の範囲内で変更したものを用いればよい。前記各種の装置の動力としては、通常の電力を利用できるのは言うまでもないが、電力等のインフラが整っていない地域においては、蓄電システムや風力やソーラーによる電力を利用するのが便利である。 In order to implement the desalination method of the present invention as described above, an ozone treatment device for ozone treatment of salt-containing water, an electrolytic treatment device for electrolytic treatment of ozone-treated water, and a reverse osmosis membrane module An apparatus for desalinating salt-containing water containing a desalination treatment apparatus comprising: Moreover, the mineral component addition apparatus for adding a mineral component to the fresh water desalted by the reverse osmosis membrane module can also be used in combination as an additional component as necessary. These series of manufacturing apparatuses are another aspect of the present invention. However, individual apparatuses such as an ozone treatment apparatus, an electrolytic treatment apparatus, a desalination treatment apparatus including a reverse osmosis membrane module, and a mineral component addition apparatus are specially used. It is not necessary to use a known one as it is, or a modified one within the scope of ordinary design matters performed by those skilled in the art may be used. Needless to say, normal power can be used as power for the various devices. However, in regions where infrastructure such as power is not available, it is convenient to use power from a power storage system, wind power, or solar power.

以下、図を参照しながら本発明の方法を説明する。図１は、本発明の淡水化の方法の一例を示すフロシートである。海から取水された海水は、先ず、オゾン処理装置に導かれオゾン処理され、次いで、電解処理装置に導かれ電解処理され。そして、電解処理された水は
逆浸透膜モジュールからなる脱塩処理装置に導かれ、脱塩処理が行われ淡水化される。場合によっては、脱塩処理が行われた淡水は、その後、ミネラル成分添加装置に導かれ、コンピュータ等で適当に制御されつつ所定量のミネラル成分が添加され、最終的に目的・用途にかなった淡水（例えば、飲料水）が得られる。 The method of the present invention will be described below with reference to the drawings. FIG. 1 is a flow sheet showing an example of the desalination method of the present invention. Seawater taken from the sea is first guided to an ozone treatment device and subjected to ozone treatment, and then guided to an electrolytic treatment device and subjected to electrolytic treatment. And the electrolyzed water is guide | induced to the desalination processing apparatus which consists of a reverse osmosis membrane module, a desalination process is performed and it desalinates. In some cases, the desalted fresh water is then led to a mineral component addition device, and a predetermined amount of mineral component is added while being controlled appropriately by a computer or the like, and finally, it has served its purpose and use. Fresh water (eg, drinking water) is obtained.

本発明の淡水化の方法の一例を示すフロシートである。It is a flow sheet which shows an example of the method of desalination of this invention.

Claims (6)

塩類含有水を逆浸透膜モジュールにより脱塩処理して淡水化するに際し、先ず、塩類含有水をオゾン処理し、次いで電解処理した後、逆浸透膜モジュールに供給することを特徴とする塩類含有水の淡水化方法。 When desalinating salt-containing water with a reverse osmosis membrane module to desalinate, the salt-containing water is supplied to the reverse osmosis membrane module after first ozone-treating the salt-containing water and then electrolytically treating it. Desalination method. 逆浸透膜モジュールにより脱塩処理された淡水に、ミネラル成分を添加することを特徴とする請求項１記載の塩類含有水の淡水化方法。 The method for desalinating salt-containing water according to claim 1, wherein a mineral component is added to fresh water desalted by the reverse osmosis membrane module. ミネラル成分として、塩化ナトリウムと塩化マグネシウムと塩化カルシウムを主体とするミネラルを用い、２０〜５００ｍｇ／ｌ量添加することを特徴とする請求項２記載の塩類含有水の淡水化方法。 The salt-containing water desalination method according to claim 2, wherein a mineral mainly composed of sodium chloride, magnesium chloride, and calcium chloride is used as the mineral component, and 20 to 500 mg / l is added. ミネラル成分として、逆浸透膜モジュールにより脱塩処理された淡水を、微量のラジウムを含む風化した粒状花崗岩層を通過させることによって得られる、粒状花崗岩の浸漬水を用い、この浸漬水がミネラル成分量として２０〜５００ｍｇ／ｌ量添加されるものであることを特徴とする請求項２記載の塩類含有水の淡水化方法。 As the mineral component, the granulated granite immersion water obtained by passing fresh water desalted by the reverse osmosis membrane module through a weathered granular granite layer containing a small amount of radium is used. The method for desalinating salt-containing water according to claim 2, wherein 20 to 500 mg / l is added. 塩類含有水をオゾン処理するためのオゾン処理装置、オゾン処理された水を電解処理するための電解処理装置、及び逆浸透膜モジュールからなる脱塩処理装置を構成要素として含む塩類含有水を淡水化するための装置。 Ozone treatment equipment for ozone treatment of salt-containing water, electrolytic treatment equipment for electrolytic treatment of ozone-treated water, and desalination treatment equipment comprising a reverse osmosis membrane module as salt components for desalination Device to do. 逆浸透膜モジュールにより脱塩処理された淡水に、ミネラル成分を添加するためのミネラル成分添加装置を構成要素として含む請求項５記載の塩類含有水を淡水化するための装置。




The apparatus for desalinating the salt-containing water of Claim 5 which contains the mineral component addition apparatus for adding a mineral component to the fresh water desalted by the reverse osmosis membrane module as a component.




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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014161826A (en) * 2013-02-27 2014-09-08 Jfe Engineering Corp Water treatment method and apparatus

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05305298A (en) * 1992-04-17 1993-11-19 Fumio Denpo Method and apparatus for water treatment
JPH09323029A (en) * 1996-06-05 1997-12-16 Nitto Denko Corp Water desalting method and device therefor
JPH11207394A (en) * 1998-01-26 1999-08-03 Asahi Glass Engineering Co Ltd Desalting method for raw water by membrane process and desalting
JP2004065196A (en) * 2002-08-09 2004-03-04 Suntory Ltd Mineral composition produced by using seawater
JP3132821U (en) * 2007-04-06 2007-06-21 力 久保 Mineral water purifier
JP2008086989A (en) * 2006-06-28 2008-04-17 Sanyo Electric Co Ltd Water supply apparatus

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05305298A (en) * 1992-04-17 1993-11-19 Fumio Denpo Method and apparatus for water treatment
JPH09323029A (en) * 1996-06-05 1997-12-16 Nitto Denko Corp Water desalting method and device therefor
JPH11207394A (en) * 1998-01-26 1999-08-03 Asahi Glass Engineering Co Ltd Desalting method for raw water by membrane process and desalting
JP2004065196A (en) * 2002-08-09 2004-03-04 Suntory Ltd Mineral composition produced by using seawater
JP2008086989A (en) * 2006-06-28 2008-04-17 Sanyo Electric Co Ltd Water supply apparatus
JP3132821U (en) * 2007-04-06 2007-06-21 力 久保 Mineral water purifier

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014161826A (en) * 2013-02-27 2014-09-08 Jfe Engineering Corp Water treatment method and apparatus

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