JPS6312309A - Hollow yarn membrane module structure - Google Patents
Hollow yarn membrane module structureInfo
- Publication number
- JPS6312309A JPS6312309A JP61154048A JP15404886A JPS6312309A JP S6312309 A JPS6312309 A JP S6312309A JP 61154048 A JP61154048 A JP 61154048A JP 15404886 A JP15404886 A JP 15404886A JP S6312309 A JPS6312309 A JP S6312309A
- Authority
- JP
- Japan
- Prior art keywords
- hollow yarn
- yarn membrane
- hollow fiber
- fiber membrane
- module
- 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.)
- Pending
Links
- 239000012528 membrane Substances 0.000 title claims abstract description 48
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 32
- 238000011001 backwashing Methods 0.000 claims abstract description 14
- 239000012510 hollow fiber Substances 0.000 claims description 41
- 230000000694 effects Effects 0.000 abstract description 4
- 238000005260 corrosion Methods 0.000 abstract description 2
- 230000007797 corrosion Effects 0.000 abstract description 2
- 238000001914 filtration Methods 0.000 description 6
- 238000000746 purification Methods 0.000 description 4
- 238000009835 boiling Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 239000002901 radioactive waste Substances 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000002285 radioactive effect Effects 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Abstract
Description
【発明の詳細な説明】
〔発明の利用分野〕
本発明は、原子力発電所等における復水等の浄化に使用
する中空糸膜フィルタに係り、特に、中空糸膜フィルタ
の運転年数を延長するのに好適な中空糸膜モジュール構
造に関する。[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a hollow fiber membrane filter used for purifying condensate, etc. in nuclear power plants, etc., and particularly relates to a hollow fiber membrane filter used for purifying condensate, etc. in nuclear power plants, etc. The present invention relates to a hollow fiber membrane module structure suitable for.
沸騰水型原子力発電所では、プラントの運転により、機
器、配管等の内表面に放射性の核種が付着するため、こ
れら機器、配管の表面の線量率が高くなる。この線量率
が高い場合、プラントの定期検査時の作業員の放射線被
ばくの機会が増すためこの線量率をできるかぎり低くお
さえることが望まれている。この線量率は原子炉へ供給
される水中に含まれている不純物Ｆｅ、Ｎｉ、Ｇｏが多
ければ高くなるとされており、この観点から各種浄化装
置を用いて厳重な水質管理がなされている。In boiling water nuclear power plants, radioactive nuclides adhere to the inner surfaces of equipment, piping, etc. due to plant operation, resulting in high dose rates on the surfaces of these equipment and piping. If this dose rate is high, the chances of workers being exposed to radiation during regular plant inspections increase, so it is desirable to keep this dose rate as low as possible. This dose rate is said to increase as the impurities Fe, Ni, and Go contained in the water supplied to the nuclear reactor increase, and from this point of view, strict water quality control is performed using various purification devices.
しかし、これら浄化装置からは運転に伴い、多量の放射
性廃棄物が発生し、それらの量はプラント全体から発生
する量の約５０％にも達する。従って、これら浄化系か
らの廃棄物の発生量を低減することが重要である。However, these purification devices generate a large amount of radioactive waste during operation, and the amount of radioactive waste reaches about 50% of the amount generated from the entire plant. Therefore, it is important to reduce the amount of waste generated from these purification systems.
最近、沸騰水型原子力発電所の復水浄化系として中空糸
膜モジュールを用いた中空糸膜フィルタの採用が検討さ
れるようになってきた。第２図は従来の中空糸膜モジュ
ールの概略構成を示す、外径１ｍｍの中空状の糸４を数
千水束にし、両端１゜５を開口した状態でエポキシ樹脂
で固定している。Recently, consideration has been given to adopting hollow fiber membrane filters using hollow fiber membrane modules as condensate purification systems for boiling water nuclear power plants. FIG. 2 shows a schematic structure of a conventional hollow fiber membrane module, in which several thousand water bundles of hollow fibers 4 with an outer diameter of 1 mm are fixed with epoxy resin with both ends opened at 1°5.
この中空糸膜の束はポリエチレン等の筒でおおわれ、外
力から保護されている。復水は主に下端５より流入し、
中空糸膜を透過し、上端１から流出する。中空糸膜モジ
ュールのろ過差圧が一定値になるまで採水が行われる。This bundle of hollow fiber membranes is covered with a tube made of polyethylene or the like to protect it from external forces. Condensate mainly flows in from the lower end 5,
It passes through the hollow fiber membrane and flows out from the upper end 1. Water is sampled until the filtration differential pressure of the hollow fiber membrane module reaches a constant value.
ろ過差圧が一定値になった後、上端１．下端５より加圧
空気が供給され。After the filtration differential pressure reaches a constant value, the upper end 1. Pressurized air is supplied from the lower end 5.
中空糸膜の外側に付着したクラッドが除去される。Crud attached to the outside of the hollow fiber membrane is removed.
廃液の排出が行われた後、採水逆洗が行われ、この過程
が繰り返し行われることになる。After the waste liquid is discharged, water is collected and backwashed, and this process is repeated.
逆洗後の圧力、初期差圧は採水逆洗のくり返しにより１
次第に増加する。この増加速度が早いと、中空糸膜モジ
ュールの交換年数も短くなる。従来技術の中空糸膜モジ
ュールでは、ろ過面積を大きくするため、長さ２ｍ程度
の中空糸膜が用いられているので、膜内圧損が大きく初
期差圧上昇速度が早くなることが予想されていた。中空
糸膜モジュールは高価なため、その初期差圧上昇を抑制
し、モジュール交換年数を延長させることができるモジ
ュールを開発することが必要であった。The pressure after backwashing and the initial differential pressure decrease to 1 due to repeated water sampling and backwashing.
Gradually increases. If this rate of increase is rapid, the number of years the hollow fiber membrane module will need to be replaced will also be shortened. In the conventional hollow fiber membrane module, a hollow fiber membrane with a length of about 2 m is used to increase the filtration area, so it was expected that the intramembrane pressure drop would be large and the initial differential pressure increase rate would be faster. . Since hollow fiber membrane modules are expensive, it was necessary to develop a module that can suppress the initial rise in differential pressure and extend the number of years the module can be replaced.
なお、この種の技術で関連するものには特開昭６０−２
０６４０５号公報が挙げられる。In addition, related to this type of technology is Japanese Patent Application Laid-open No. 60-2
Publication No. 06405 is mentioned.
本発明の目的は、現状中空糸膜フィルター搭と同等の塔
径内におさまり、かつ、長い交換年数の中空糸膜モジュ
ール構造を提供することにある。An object of the present invention is to provide a hollow fiber membrane module structure that fits within the same tower diameter as the current hollow fiber membrane filter tower and can be replaced for a long time.
本発明は、端部開口の中空糸膜を両端で固定し。 In the present invention, a hollow fiber membrane with open ends is fixed at both ends.
下端面にも中空糸膜からのろ過集水部を設け、この部分
と上端面を連通ずる集水管をもった中空糸膜モジュール
において、集水管の内側、又は、外側に逆洗用の空気を
送る空気管を設けている中空糸膜モジュールに関する。In a hollow fiber membrane module that has a filtration water collection part from the hollow fiber membrane also on the lower end face and a water collection pipe that communicates this part with the upper end face, air for backwashing is supplied inside or outside the water collection pipe. The present invention relates to a hollow fiber membrane module provided with an air pipe.
以下、本発明の一実施例を第１図により説明する。中空
糸膜モジュールの外側は多孔性の保護筒７でおおわれて
おり、ここから復水が入り、中空に充填されている多数
の中空糸膜４を通過する。An embodiment of the present invention will be described below with reference to FIG. The outside of the hollow fiber membrane module is covered with a porous protection tube 7, through which condensate enters and passes through a large number of hollow fiber membranes 4 filled in the hollow fibers.
中空糸膜４は上端部１及び下端部５でエポキシ樹脂等で
固定されており、その端面はいずれも開口している・中
空糸の下端部には中空糸膜を通過し。The hollow fiber membrane 4 is fixed at the upper end 1 and lower end 5 with epoxy resin or the like, and both end faces are open.The lower end of the hollow fiber passes through the hollow fiber membrane.
ろ過された水の一部が集合する集水室６が設けられて、
そこから上部迄ろ過水を移動させる集水管２を配設して
いる。従って、中空糸膜４を通過したろ過水の一部は中
空糸膜４の膜内を上昇して、上端部１から流出するか、
ろ過水の残りは中空糸膜４の膜内を下降して、集水室６
．集水管２を経由して流出する。このようなろ過操作は
差圧が所定値に達するまで行われる。所定値に達すると
、ろ過操作は中止され逆洗操作が行われる。逆洗用の空
気を多孔性の空気管３を通して圧送し、中空糸膜４の外
表面に付着した腐食生成物を気泡によ ・り洗浄する。A water collection chamber 6 where a part of the filtered water collects is provided,
A water collection pipe 2 is provided to move the filtered water from there to the upper part. Therefore, a part of the filtrate water that has passed through the hollow fiber membrane 4 rises inside the hollow fiber membrane 4 and flows out from the upper end 1, or
The remainder of the filtrated water descends inside the hollow fiber membrane 4 and enters the water collection chamber 6.
．． It flows out via the water collection pipe 2. Such filtration operation is performed until the differential pressure reaches a predetermined value. When a predetermined value is reached, the filtration operation is stopped and a backwashing operation is performed. Air for backwashing is forced through the porous air pipe 3, and the corrosion products adhering to the outer surface of the hollow fiber membrane 4 are washed away by bubbles.
また、逆洗用の空気は中空糸膜モジュール上端部１から
中空糸膜４内に供給し、中空糸膜４の内部から外部へ水
を押し出すことによって、洗浄効果を高めている。In addition, air for backwashing is supplied into the hollow fiber membrane 4 from the upper end 1 of the hollow fiber membrane module, and water is pushed out from the inside of the hollow fiber membrane 4 to improve the cleaning effect.
効果の一例を第４図に示す。各採水によるーサイクルの
クラッド負荷量を累積したものを横軸とし、逆洗後の初
期差圧の変化を予測したものである。従来のタイプの空
気管がないＡモジュールに対し、空気管をもつＢモジュ
ールはその逆洗効率が高いため、初期差圧上昇が遅く約
半分程度の速度になると予想される。従って、本発明に
よれば、中空糸膜モジュール初期差圧上昇を従来の半分
程度にできるので、その交換年数も従来の倍に達する。An example of the effect is shown in FIG. The horizontal axis is the cumulative amount of crud load for each cycle due to each water sampling, and the change in the initial differential pressure after backwashing is predicted. Compared to the conventional type A module without air pipes, the B module with air pipes has a high backwashing efficiency, so it is expected that the initial differential pressure rise will be slower and about half the speed. Therefore, according to the present invention, the increase in the initial differential pressure of the hollow fiber membrane module can be reduced to about half that of the conventional method, and the number of years of replacement thereof can also be doubled compared to the conventional method.
本発明によれば、多孔性の空気管を集水管の内側は、又
は、外側に配置しているので、逆洗時に空気を吹き出せ
、中空糸膜の洗浄を効率よく行うことができる。According to the present invention, since the porous air pipe is arranged inside or outside the water collecting pipe, air can be blown out during backwashing, and the hollow fiber membrane can be efficiently cleaned.
Claims (1)
糸膜出に水集水部を設け、前記集水部と上端面を連通す
る集水管をもつ中空糸膜モジュールにおいて、 前記集水管の内側又は外側に逆洗用の空気を送る空気管
を設けたことを特徴とする中空糸膜モジュール構造。 ２、前記空気管はモジュール当り一本または数本である
ことを特徴とする特許請求の範囲第１項記載の中空糸膜
モジュール構造。[Scope of Claims] 1. A hollow fiber membrane with open ends is fixed at both ends, a water collection section is provided on the bottom end surface of the hollow fiber membrane, and a water collection pipe is provided that communicates the water collection section with the top end surface. A hollow fiber membrane module structure, characterized in that the hollow fiber membrane module is provided with an air pipe for sending air for backwashing inside or outside of the water collection pipe. 2. The hollow fiber membrane module structure according to claim 1, wherein the number of air pipes is one or several per module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61154048A JPS6312309A (en) | 1986-07-02 | 1986-07-02 | Hollow yarn membrane module structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61154048A JPS6312309A (en) | 1986-07-02 | 1986-07-02 | Hollow yarn membrane module structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6312309A true JPS6312309A (en) | 1988-01-19 |
Family
ID=15575775
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61154048A Pending JPS6312309A (en) | 1986-07-02 | 1986-07-02 | Hollow yarn membrane module structure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6312309A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02265628A (en) * | 1989-04-05 | 1990-10-30 | Kurita Water Ind Ltd | Membranous separating process |
-
1986
- 1986-07-02 JP JP61154048A patent/JPS6312309A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02265628A (en) * | 1989-04-05 | 1990-10-30 | Kurita Water Ind Ltd | Membranous separating process |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS61291007A (en) | Hollow yarn type separation membrane element | |
| JPS61274709A (en) | Hollow yarn membrane filter apparatus | |
| JPS61107905A (en) | Filter | |
| JPS61263605A (en) | Hollow yarn membrane device | |
| JPS624408A (en) | Filtration device using hollow yarn membrane | |
| SE9203676D0 (en) | DEVICE FOR FILTERING OF THE WATER TO A NUCLEAR COOLING SYSTEM IN NUCLEAR POWER PLANT | |
| JPS6312309A (en) | Hollow yarn membrane module structure | |
| US4780213A (en) | Filter media and method of filtration | |
| JP3775617B2 (en) | How to backwash pleated filters | |
| JPH0824825B2 (en) | Multi-stage hollow fiber type filter | |
| JPS62149304A (en) | Filter | |
| JPH044011B2 (en) | ||
| JPS63315109A (en) | Ion exchangeable filter | |
| JPH01266809A (en) | Method for backwashing hollow yarn membrane filter | |
| JPS63274405A (en) | Reverse washing treatment method of hollow fiber membrane filter apparatus | |
| JPS6365910A (en) | Cleaning device using hollow yarn membrane module | |
| JPH022836A (en) | Hollow thread membrane filter device | |
| JPH0824822B2 (en) | Filtration device using hollow fiber | |
| JPS6467206A (en) | Element for filtering and desalting apparatus | |
| JPH0478425A (en) | Hollow yarn membrane module | |
| JPH02261522A (en) | Hollow fiber membrane module | |
| JPH0729032B2 (en) | Filtration device | |
| JPH0437621Y2 (en) | ||
| JPS6071997A (en) | Filter for treating radioactive waste liquor | |
| JPH01107807A (en) | Hollow yarn membrane filter |