JPH01307490A - Method of recovering backwashing waste water of condensate desalting device - Google Patents
Method of recovering backwashing waste water of condensate desalting deviceInfo
- Publication number
- JPH01307490A JPH01307490A JP63137411A JP13741188A JPH01307490A JP H01307490 A JPH01307490 A JP H01307490A JP 63137411 A JP63137411 A JP 63137411A JP 13741188 A JP13741188 A JP 13741188A JP H01307490 A JPH01307490 A JP H01307490A
- Authority
- JP
- Japan
- Prior art keywords
- water
- hollow yarn
- hollow fiber
- filtration
- modules
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000002351 wastewater Substances 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims description 7
- 238000011001 backwashing Methods 0.000 title abstract description 9
- 238000011033 desalting Methods 0.000 title abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 52
- 238000001914 filtration Methods 0.000 claims abstract description 38
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims abstract description 32
- 239000010419 fine particle Substances 0.000 claims abstract description 11
- 239000012510 hollow fiber Substances 0.000 claims description 40
- 238000010612 desalination reaction Methods 0.000 claims description 20
- 230000008929 regeneration Effects 0.000 claims description 7
- 238000011069 regeneration method Methods 0.000 claims description 7
- 238000005192 partition Methods 0.000 abstract description 6
- 239000011148 porous material Substances 0.000 abstract description 2
- 150000003839 salts Chemical class 0.000 abstract description 2
- 238000004064 recycling Methods 0.000 abstract 1
- NWUYHJFMYQTDRP-UHFFFAOYSA-N 1,2-bis(ethenyl)benzene;1-ethenyl-2-ethylbenzene;styrene Chemical compound C=CC1=CC=CC=C1.CCC1=CC=CC=C1C=C.C=CC1=CC=CC=C1C=C NWUYHJFMYQTDRP-UHFFFAOYSA-N 0.000 description 14
- 239000003456 ion exchange resin Substances 0.000 description 12
- 229920003303 ion-exchange polymer Polymers 0.000 description 12
- 238000004140 cleaning Methods 0.000 description 8
- 239000012528 membrane Substances 0.000 description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 239000002901 radioactive waste Substances 0.000 description 5
- 238000005406 washing Methods 0.000 description 5
- 230000001172 regenerating effect Effects 0.000 description 4
- 238000005115 demineralization Methods 0.000 description 3
- 230000002328 demineralizing effect Effects 0.000 description 3
- 238000011049 filling Methods 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 150000002500 ions Chemical class 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 238000011085 pressure filtration Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 239000002253 acid Substances 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 239000003729 cation exchange resin Substances 0.000 description 2
- 238000010790 dilution Methods 0.000 description 2
- 239000012895 dilution Substances 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 238000004065 wastewater treatment Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 239000003957 anion exchange resin Substances 0.000 description 1
- 150000001450 anions Chemical class 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000013505 freshwater Substances 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000008400 supply water Substances 0.000 description 1
Classifications
-
- 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
Landscapes
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
Description
【発明の詳細な説明】
〈産業上の利用分野〉
本発明は、火力発電所あるいは原子力発電所等で使用す
る復水脱塩装置から発生する、酸化鉄微粒子を含む逆洗
排水から、前記復水脱塩装置の再生用水として再利用出
来る水を回収する方法に関する。DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention is directed to the recovery of backwash wastewater containing iron oxide fine particles generated from condensate desalination equipment used in thermal power plants, nuclear power plants, etc. The present invention relates to a method for recovering water that can be reused as reclaimed water for water desalination equipment.
〈従来の技術〉
火力発電所あるいは原子力発電所等の復水浄化系に使用
する復水脱塩装置は、複数の脱塩塔からなる通水系統と
、脱塩塔内のイオン交換樹脂を再生するための再生系統
とで構成されている。<Conventional technology> Condensate desalination equipment used for condensate purification systems in thermal power plants or nuclear power plants, etc. consists of a water flow system consisting of multiple desalination towers and a system that regenerates the ion exchange resin in the desalination towers. It consists of a regeneration system for
そして前記脱塩塔は、塔内にＨ形あるいはＮＨ４形のカ
チオン交換樹脂と、ＯＨ形のアニオン交換樹脂の混合イ
オン交換樹脂層を充填してなるものである。当該脱塩塔
は、復水中の不純物イオンをイオン交換作用により、ま
た復水中の酸化鉄微粒子、いわゆるクラッドを濾過作用
あるいは吸着作用によって除去するものであるが、イオ
ン交換樹脂層への酸化鉄微粒子の蓄積により圧力損失が
増加したり、あるいは定体積処理量に達した場合、ある
いは不純物イオンで飽和した場合には、脱塩塔内の混合
イオン交換樹脂を前記再生系統に移送して再生を行う。The demineralization tower is formed by filling the tower with a mixed ion exchange resin layer of an H type or NH4 type cation exchange resin and an OH type anion exchange resin. The demineralization tower removes impurity ions in condensate by ion exchange and iron oxide fine particles, so-called crud, in condensate by filtration or adsorption. When pressure loss increases due to accumulation of ion exchange resin, or when a constant volume throughput is reached, or when it is saturated with impurity ions, the mixed ion exchange resin in the demineralization tower is transferred to the regeneration system and regenerated. .
すなわち、混合イオン交換樹脂層を、まず圧力空気でバ
ブリングし、次いで洗浄水で逆洗することによって混合
イオン交換樹脂層内に蓄積されている酸化鉄微粒子を除
去し、しかる後にカチオン交換樹脂とアニオン交換樹脂
とに逆洗分離して、酸、アルカリ等の再生剤を用いて再
生を行う。That is, the mixed ion exchange resin layer is first bubbled with pressurized air and then backwashed with washing water to remove iron oxide fine particles accumulated in the mixed ion exchange resin layer, and then the cation exchange resin and anions are removed. The resin is backwashed and separated from the exchange resin, and then regenerated using a regenerating agent such as acid or alkali.
上述のような混合イオン交換樹脂層の逆洗によって、復
水脱塩装置からは酸化鉄微粒子を比較的多量に含む逆洗
排水が排出される。従来、火力発電所においては当該逆
洗排水を別に設けた排水処理系に移送して他の排水とと
もに処理し、また原子力発電所においては当該逆洗排水
をそのまま放射性廃棄物として処理していた。By backwashing the mixed ion exchange resin layer as described above, backwash wastewater containing a relatively large amount of iron oxide fine particles is discharged from the condensate desalting device. Conventionally, in thermal power plants, the backwash wastewater was transferred to a separate wastewater treatment system and treated together with other wastewater, and in nuclear power plants, the backwash wastewater was treated as radioactive waste.
〈発明が解決しようとする問題点〉
しかしながら、最近のような水不足の折にあっては、水
を確保すること自体が困難となりつつあり、このことは
発電所においても例外ではない。<Problems to be solved by the invention> However, in times of recent water shortages, securing water itself is becoming difficult, and power plants are no exception to this.
従って、上述のような混合イオン交換樹脂層の逆洗排水
に関しても、その発生量が比較的多量であることから従
来のようにこれをそのまま廃棄してしまうのでは水資源
の無駄遣いであり、安価に回収して再利用することが出
来れば極めて省資源かつ省エネルギー的である。Therefore, since the amount of backwashing water from the mixed ion exchange resin layer mentioned above is relatively large, it would be a waste of water resources to dispose of it as is in the conventional way, and it would be a waste of water resources. If it can be recovered and reused, it will be extremely resource-saving and energy-saving.
また、原子力発電所においては、当該逆洗排水が放射性
廃棄物の対象となるので、逆洗排水をそのまま廃棄した
のでは放射性廃棄物の発生量が膨大となるという問題点
もある。Furthermore, in nuclear power plants, the backwash wastewater is treated as radioactive waste, so if the backwash wastewater is disposed of as is, there is a problem in that a huge amount of radioactive waste will be generated.
本発明はこのような事情に鑑みてなされたもので、復水
脱塩装置の逆洗排水を簡単な操作でかつ安価に処理出来
るとともに、得られる処理水を前記復水脱塩装置の再生
用水として再利用することが出来、更に廃棄物の発生量
を従来より大幅に減らすことの出来る、逆洗排水の回収
方法を提供することを目的とするものである。The present invention has been made in view of the above circumstances, and it is possible to treat the backwash wastewater of the condensate desalination equipment with a simple operation and at low cost, and the obtained treated water can be used as the recycled water of the condensate desalination equipment. The object of the present invention is to provide a method for recovering backwash wastewater, which can be reused as waste water and further reduce the amount of waste generated significantly compared to conventional methods.
〈問題点を解決するための手段〉
上述の目的を達成するためになされた本発明は、酸化鉄
微粒子を含む復水脱塩装置の逆洗排水を、中空糸モジュ
ールを用いた濾過塔で濾過し、その濾過水を前記復水脱
塩装置の再生用水として再利用することを特徴とするも
のである。<Means for Solving the Problems> The present invention, which was made to achieve the above-mentioned object, filters backwash wastewater from a condensate desalination equipment containing iron oxide fine particles using a filtration tower using a hollow fiber module. The present invention is characterized in that the filtered water is reused as water for regeneration in the condensate desalination apparatus.
く作用〉 以下に本発明の詳細な説明する。Effect〉 The present invention will be explained in detail below.
再生系統において、混合イオン交換樹脂層内に捕捉され
ている酸化鉄微粒子を除去するために行う前述したよう
な逆洗は、通常洗浄水として純水を使用して行われる。In the regeneration system, the above-mentioned backwashing, which is performed to remove iron oxide fine particles trapped in the mixed ion exchange resin layer, is usually performed using pure water as the washing water.
従って、逆洗により排出される逆洗排水には、酸化鉄微
粒子がＦｅ（鉄）として５００〜１０，０００μｇ／ｌ
程度含まれているものの、それ以外のイオン等の不純物
はあまり含まれていない。そこで、本発明者等は当該酸
化鉄微粒子を簡単な操作でかつ安価に除去することが出
来れば、前述のような混合イオン交換樹脂層の逆洗用水
として、あるいはイオン交換樹脂の再生に用いる酸、ア
ルカリ等の再生薬品の希釈水として等、いわゆる復水脱
塩装置の再生用水として再利用可能な水質の水を得るこ
とが出来るであろうと考えた。このような考えの基に、
本発明者等は逆洗排水の処理方法について鋭意研究を重
ねた結果、中空糸モジエールを用いた濾過塔を使用して
濾過処理を行うのが最も効果的であることを確認し、本
発明を成すに至ったのである。Therefore, the backwash wastewater discharged by backwashing contains 500 to 10,000 μg/l of iron oxide fine particles as Fe (iron).
However, other impurities such as ions are not included much. Therefore, the present inventors believe that if it is possible to remove the iron oxide fine particles with a simple operation and at low cost, it can be used as water for backwashing the mixed ion exchange resin layer as described above, or as an acid used for regenerating the ion exchange resin. We thought that it would be possible to obtain water of a quality that could be reused as dilution water for regenerating chemicals such as alkali, or as regenerating water for so-called condensate desalination equipment. Based on this idea,
As a result of extensive research into the treatment method of backwash wastewater, the present inventors confirmed that the most effective method of filtration is to use a filtration tower using hollow fiber modules. It has come to fruition.
本発明に用いる、中空糸モジュールを用いた濾過塔は、
膜面に例えば０．Ｏ１μ〜１μ、あるいは分画分子量が
５００〜１，０００，０００の性能を有する微細孔を有
し、かつ外径０．３〜２龍、内径０、２〜ｌ、 ５ ａ
ｍの中空糸状に形成した濾過膜を、多数本束ねて中空糸
モジュールを形成し、当該中空糸モジュールの複数本を
濾過塔内に装着した構造のものである。当該濾過塔にお
いては、各中空糸の外側から内側へ、あるいは内側から
外側へというように、各中空糸の一方の側から他方の側
へ被処理水を通過させて各中空糸の一方の側で懸濁物質
を濾過し、他方の側から得る濾過水を集合して濾過塔か
ら流出させる。またこのような濾過の続行により各中空
糸の膜面に懸濁物質が付着して濾過塔の差圧が上昇した
場合には、中空糸の膜面を空気等の気体でバブリングし
たり、あるいは中空糸の他方の側から一方の側へ気体、
水等の流体を逆流させたりする、いわゆる膜面の洗浄を
行うことによって膜面に付着した懸濁物質を剥離させる
ことが出来、再び前記濾過を行うことが可能となる。The filtration tower using a hollow fiber module used in the present invention is
For example, 0. It has micropores with a performance of O1μ to 1μ or a molecular weight cut-off of 500 to 1,000,000, and has an outer diameter of 0.3 to 2L, an inner diameter of 0.2L to 5A.
A hollow fiber module is formed by bundling a large number of filtration membranes formed in the shape of hollow fibers, and a plurality of the hollow fiber modules are installed in a filtration tower. In the filtration tower, the water to be treated is passed from one side of each hollow fiber to the other side, such as from the outside to the inside of each hollow fiber, or from the inside to the outside. The filtered water obtained from the other side is collected and discharged from the filter tower. In addition, if suspended matter adheres to the membrane surface of each hollow fiber due to continued filtration and the differential pressure in the filtration tower increases, the membrane surface of the hollow fiber may be bubbled with gas such as air, or gas from the other side of the hollow fiber to one side,
By so-called cleaning of the membrane surface, such as by flowing a fluid such as water back, suspended matter adhering to the membrane surface can be removed, and the filtration can be performed again.
上述したような中空糸モジュールを用いた濾過塔を使用
して復水脱塩装置の逆洗排水を処理すると、膜面に０．
０１μ〜１μというような極めて微細な孔を有する濾過
膜で形成した中空糸を用いるために逆洗排水中に含まれ
ている粒径の非常に小さい酸化鉄の粒子を確実に濾過す
ることが出来、復水脱塩装置の再生用水に再利用可能な
処理水を得ることが出来る。また、濾過膜が中空糸状で
あるために単位容積光たりの濾過面積も大きく、よって
濾過塔自体も比較的小さなもので済む。When backwash wastewater from a condensate desalination equipment is treated using a filtration tower using a hollow fiber module as described above, 0.0% is generated on the membrane surface.
By using hollow fibers made of filtration membranes with extremely fine pores, such as 01μ to 1μ, it is possible to reliably filter the extremely small iron oxide particles contained in backwash wastewater. , it is possible to obtain treated water that can be reused as reclaimed water for the condensate desalination equipment. Further, since the filtration membrane is hollow fiber-like, the filtration area per unit volume of light is large, and therefore the filtration tower itself can be relatively small.
以下に本発明の実施態様を図面に基づいて説明する。Embodiments of the present invention will be described below based on the drawings.
図面は、中空糸の外側から内側へ被処理水を通過させて
濾過を行う、いわゆる外圧型濾過タイプの中空糸モジュ
ールを用いた濾過塔を使用して復水脱塩装置の逆洗排水
を処理する場合のフローを示す説明図であり、本実施態
様に示した濾過塔１は濾過塔１内に横設した仕切板２に
複数本の中空糸モジュール３を懸架した構造のものであ
る。当該中空糸モジュール３は、多数の中空糸を、各中
空糸の上端部を開口するとともにその下端部を閉塞して
束ね、外筒内に収納したものであり、また各中空糸モジ
ュール３の下端にスカート部４を有し、ディストリビュ
ータ５から発生する気泡を当該スカート部４で受けられ
るようにしてあり、更に当該気泡を各中空糸の外表面に
通過させるための貫通口を当該モジュール３の下端部に
有するものである。なお、使用する中空糸モジュールの
構造はこれに限らずいかなるものでもよい。The drawing shows how backwash wastewater from a condensate desalination equipment is treated using a filtration tower that uses a hollow fiber module of the so-called external pressure filtration type, which filters water by passing it from the outside to the inside of the hollow fiber. The filtering tower 1 shown in this embodiment has a structure in which a plurality of hollow fiber modules 3 are suspended between a partition plate 2 installed horizontally within the filtering tower 1. The hollow fiber module 3 is made by bundling a large number of hollow fibers with the upper end of each hollow fiber open and the lower end closed, and stored in an outer cylinder, and the lower end of each hollow fiber module 3 A skirt portion 4 is provided at the bottom of the module 3 so that the air bubbles generated from the distributor 5 can be received by the skirt portion 4, and a through hole is provided at the lower end of the module 3 to allow the air bubbles to pass through the outer surface of each hollow fiber. This is what the department has. Note that the structure of the hollow fiber module to be used is not limited to this, and any structure may be used.
当該濾過塔１を使用して、前述のような復水脱塩装置の
逆洗排水を処理する場合には、濾過塔１の下部に付設し
た原水流入管６から逆洗排水を流入し、逆洗排水を各中
空糸モジュール３の前記貫通口、あるいは側部から各中
空糸モジュール３内に導入して、各中空糸の外側で酸化
鉄微粒子を濾過する。そして、各中空糸内側に得られる
濾過水を前記仕切板２の上方で集合し、清浄な濾過水を
処理水流出管７から流出させて処理水槽８に一旦受け、
しかる後に前記復水脱塩装置の再生用水として再利用す
る。When using the filter tower 1 to treat backwash wastewater from the condensate desalination equipment as described above, the backwash wastewater flows in from the raw water inflow pipe 6 attached to the lower part of the filter tower 1, and the backwash wastewater is Washing water is introduced into each hollow fiber module 3 from the through hole or the side of each hollow fiber module 3, and iron oxide fine particles are filtered outside each hollow fiber. Then, the filtered water obtained inside each hollow fiber is collected above the partition plate 2, and the clean filtered water is flowed out from the treated water outflow pipe 7 and once received in the treated water tank 8,
Thereafter, the water is reused as regeneration water for the condensate desalination equipment.
本発明者等が実施したところによれば、このような濾過
により全鉄濃度５μｇ Ｆ ｅ ／ ｊ！以下、電気伝
導率ｌμａ ／ ｃ＋ａ以下というような高純度の濾過
水を安定して得ることが出来、これを例えば再生薬品の
希釈水として使用した場合は勿論、混合イオン交換樹脂
層の逆洗用水として再び使用した場合も何ら問題は生じ
なかった。According to the results carried out by the present inventors, such filtration results in a total iron concentration of 5 μg Fe/j! Highly purified filtered water with an electrical conductivity of less than lμa/c+a can be stably obtained, and this can be used, for example, as dilution water for regenerated chemicals, as well as water for backwashing mixed ion exchange resin layers. No problems occurred when it was used again.
このような濾過の続行により濾過塔１の圧力損失が増加
した場合、以下の洗浄を行う。If the pressure loss of the filtration tower 1 increases due to the continuation of such filtration, the following cleaning is performed.
すなわち、通水を中断し、濾過塔１の仕切板２の下部に
流入逆洗排水を、また仕切板２の上方に濾過水を満たし
たまま、空気流入管９Ａがら空気を流入させる。当該空
気はディストリビュータ５から気泡状となって上昇し、
当該上昇した気泡は前述した各中空糸モジュール３のス
カート部４を介して下端に設けた貫通口から各中空糸モ
ジュール３の内部に流入し、各中空糸を振動させ、各中
空糸の外側の膜面に付着している酸化鉄を剥離させる。That is, water flow is interrupted, and air is allowed to flow in through the air inlet pipe 9A while filling the lower part of the partition plate 2 of the filtration tower 1 with inflowing backwash wastewater and filling the upper part of the partition plate 2 with filtered water. The air rises from the distributor 5 in the form of bubbles,
The rising air bubbles flow into the interior of each hollow fiber module 3 from the through hole provided at the lower end via the skirt portion 4 of each hollow fiber module 3 described above, vibrate each hollow fiber, and cause the outer side of each hollow fiber to vibrate. Peel off iron oxide adhering to the film surface.
なお、当該気泡は各中空糸モジュール３の上側部から放
出させ、次いで濾過塔ｌの側胴部上方に付設した空気抜
き管ＩＯから流出させる。Note that the bubbles are released from the upper side of each hollow fiber module 3, and then flowed out from an air vent pipe IO attached above the side body of the filtration tower I.
このような各中空糸の気泡による振動を充分に行った後
、濾過塔ｌの上部に付設した空気流入管９Ｂから空気を
圧入して仕切板２の上部に存在する濾過水を各中空糸の
内側から外側へ逆流させ、多量の酸化鉄を含む洗浄排水
をブロー管１１より流出させ、洗浄排水槽１２で一旦受
ける。当該槽１２内の洗浄排水は、火力発電所の場合に
は排水処理系に移送して処理し、また原子力発電所の場
合には放射性廃棄物処理系へ移送して処理する。After the air bubbles in each hollow fiber are sufficiently vibrated, air is forced in from the air inflow pipe 9B attached to the top of the filtration tower 1, and the filtered water present in the top of the partition plate 2 is transferred to each hollow fiber. The cleaning wastewater containing a large amount of iron oxide is caused to flow backward from the inside to the outside, and is discharged from the blow pipe 11 and once received in the cleaning drainage tank 12. The cleaning wastewater in the tank 12 is transferred to a wastewater treatment system for treatment in the case of a thermal power plant, and is transferred to a radioactive waste treatment system for treatment in the case of a nuclear power plant.
上述した如く、中空糸モジュール３を用いた濾過塔ｌの
洗浄に際しては、外部から新たに洗浄用の水を濾過塔ｌ
内に供給する必要はなく、濾過塔１内の保有水と、外部
から供給する空気とを用いて洗浄を行うことが出来るの
で洗浄排水量が極めて少な゛くて済み、従って原子力発
電所の場合には放射性廃棄物の発生量を著しく低減する
ことが出来る。As mentioned above, when cleaning the filtration tower l using the hollow fiber module 3, fresh water for washing is added to the filtration tower l from the outside.
There is no need to supply water to the filter tower 1, and cleaning can be carried out using the water stored in the filter tower 1 and the air supplied from outside, so the amount of cleaning waste water is extremely small, so in the case of a nuclear power plant, can significantly reduce the amount of radioactive waste generated.
このような洗浄により濾過塔ｌの圧力損失を回復させる
ことが出来、再び前述した濾過を行うことが可能となる
。By such washing, the pressure loss of the filtration tower 1 can be recovered, and the above-described filtration can be performed again.
なお、上述の実施態様においては、外圧型濾過タイプの
中空糸モジュールを用いた濾過塔の場合について説明し
たが、本発明においては中空糸の内側から外側へ逆洗排
水を通過させて濾過を行う、内圧型濾過タイプの中空糸
モジュールを用いた濾過塔を使用することも可能である
ことは言うまでもないことである。In addition, in the above-mentioned embodiment, the case of a filtration tower using an external pressure filtration type hollow fiber module was explained, but in the present invention, filtration is performed by passing backwash wastewater from the inside of the hollow fiber to the outside. Needless to say, it is also possible to use a filtration tower using an internal pressure filtration type hollow fiber module.
く効果〉
以上説明した如く、本発明によれば酸化鉄微粒子を含む
復水脱塩装置の逆洗排水を、中空糸モジュールを用いた
濾過塔で直接濾過するという非常に簡単な操作で、粒径
の極めて小さい酸化鉄の粒子を確実に除去することが出
来、得られる濾過水を前記復水脱塩装置の再生用水とし
て再利用することが十分可能となる。As explained above, according to the present invention, the backwash wastewater from the condensate desalination equipment containing fine iron oxide particles can be directly filtered through a filtration tower using a hollow fiber module, which is a very simple operation. Iron oxide particles with extremely small diameters can be reliably removed, and the resulting filtrate can be fully reused as water for regeneration in the condensate desalination apparatus.
また、本発明は逆洗排水の処理に際して何ら薬品を使用
しないので、回収水中の塩類濃度を増加させるようなこ
ともなく、かつランニングコスト的にも安価に済む。Furthermore, since the present invention does not use any chemicals during the treatment of backwash wastewater, there is no increase in the salt concentration in the recovered water, and the running cost is low.
更に、中空糸モジュールを用いた濾過塔は、単位容積当
たりの濾過面積が大きいから逆洗排水の処理に要する濾
過塔自体も比較的小さなもので済み、従って省スペース
的である。Furthermore, since a filtration tower using a hollow fiber module has a large filtration area per unit volume, the filtration tower itself required for treating backwash wastewater can be relatively small, and therefore space is saved.
図面は本発明の実施態様の一例を示すフローの説明図で
ある。The drawing is an explanatory diagram of a flow showing an example of an embodiment of the present invention.
Claims (1)
糸モジュールを用いた濾過塔で濾過し、その濾過水を前
記復水脱塩装置の再生用水として再利用することを特徴
とする復水脱塩装置の逆洗排水の回収方法。The method is characterized in that backwash wastewater from the condensate desalination device containing iron oxide fine particles is filtered through a filtration tower using a hollow fiber module, and the filtered water is reused as water for regeneration in the condensate desalination device. A method for recovering backwash wastewater from condensate desalination equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63137411A JP2677380B2 (en) | 1988-06-06 | 1988-06-06 | Method for collecting backwash wastewater from condensate demineralizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63137411A JP2677380B2 (en) | 1988-06-06 | 1988-06-06 | Method for collecting backwash wastewater from condensate demineralizer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01307490A true JPH01307490A (en) | 1989-12-12 |
| JP2677380B2 JP2677380B2 (en) | 1997-11-17 |
Family
ID=15198009
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63137411A Expired - Lifetime JP2677380B2 (en) | 1988-06-06 | 1988-06-06 | Method for collecting backwash wastewater from condensate demineralizer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2677380B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20000063340A (en) * | 2000-06-28 | 2000-11-06 | 주용현 | Treatment of the wastewater of semiconductor sawing process using ultrafiltration membrane |
-
1988
- 1988-06-06 JP JP63137411A patent/JP2677380B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20000063340A (en) * | 2000-06-28 | 2000-11-06 | 주용현 | Treatment of the wastewater of semiconductor sawing process using ultrafiltration membrane |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2677380B2 (en) | 1997-11-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP2000051669A (en) | Hollow fiber membrane module fitted with lower cap | |
| JPH05208189A (en) | Water purifying plant | |
| JPS61181507A (en) | Method for washing hollow yarn filter module | |
| JPH11244852A (en) | Desalination device and back washing method of filter used for desalination device | |
| JPH01307490A (en) | Method of recovering backwashing waste water of condensate desalting device | |
| JPH11253968A (en) | Water recovering apparatus | |
| JPS60257840A (en) | Ion exchange apparatus | |
| CN212954669U (en) | Multi-stage filtration water purification system and water purifier | |
| JPH0356126A (en) | Hollow yarn membrane filter having desalting function | |
| CN110451677A (en) | A kind of pickling lines rinsing waste-water treatment process | |
| JP2940651B2 (en) | Pure water production equipment | |
| CN203728671U (en) | Emission reduction system after washing with ultrapure water in clean production | |
| JPH0966296A (en) | Water treatment method and apparatus | |
| JP3661204B2 (en) | Ion exchange apparatus and regeneration method | |
| JPH0871318A (en) | Filter | |
| JPH0747242A (en) | Non-aid type filter | |
| CN215049260U (en) | Soft water treatment system | |
| CN220223731U (en) | Reclaimed water supply and utilization system | |
| JPS63315109A (en) | Ion exchangeable filter | |
| JP2742975B2 (en) | Regeneration method of ion exchange device | |
| JPH06134490A (en) | Production equipment of make-up water for power station | |
| JPH03293087A (en) | Production of ultra-pure water | |
| JP2708043B2 (en) | Plant operation method | |
| JP2660261B2 (en) | Multifunctional module | |
| JPH08105995A (en) | Condensate filter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080725 Year of fee payment: 11 |
|
| EXPY | Cancellation because of completion of term |