JPS6365924A - Precoating type filtration - Google Patents
Precoating type filtrationInfo
- Publication number
- JPS6365924A JPS6365924A JP61207993A JP20799386A JPS6365924A JP S6365924 A JPS6365924 A JP S6365924A JP 61207993 A JP61207993 A JP 61207993A JP 20799386 A JP20799386 A JP 20799386A JP S6365924 A JPS6365924 A JP S6365924A
- Authority
- JP
- Japan
- Prior art keywords
- filter
- resin powder
- filter aid
- treated
- water
- 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
- 238000001914 filtration Methods 0.000 title claims abstract description 33
- 239000000843 powder Substances 0.000 claims abstract description 26
- 239000011347 resin Substances 0.000 claims abstract description 10
- 229920005989 resin Polymers 0.000 claims abstract description 10
- 239000002002 slurry Substances 0.000 claims abstract description 10
- 239000012535 impurity Substances 0.000 claims abstract description 9
- 150000001768 cations Chemical class 0.000 claims abstract description 8
- 150000001450 anions Chemical class 0.000 claims abstract description 7
- 238000005342 ion exchange Methods 0.000 claims abstract description 7
- 230000002378 acidificating effect Effects 0.000 claims description 14
- 239000007788 liquid Substances 0.000 claims description 5
- 239000002245 particle Substances 0.000 claims description 4
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 125000002843 carboxylic acid group Chemical group 0.000 claims 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 26
- 239000003729 cation exchange resin Substances 0.000 abstract description 15
- 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 abstract description 13
- 239000002253 acid Substances 0.000 abstract description 5
- 150000001732 carboxylic acid derivatives Chemical class 0.000 abstract description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 11
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 5
- 229910052742 iron Inorganic materials 0.000 description 5
- 229910052717 sulfur Inorganic materials 0.000 description 5
- 239000011593 sulfur Substances 0.000 description 5
- 239000008400 supply water Substances 0.000 description 4
- 239000003957 anion exchange resin Substances 0.000 description 3
- 230000014759 maintenance of location Effects 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- 229940023913 cation exchange resins Drugs 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000003213 activating effect Effects 0.000 description 1
- 239000010426 asphalt Substances 0.000 description 1
- 239000012752 auxiliary agent Substances 0.000 description 1
- 238000011001 backwashing Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000009924 canning Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000005518 polymer electrolyte Substances 0.000 description 1
- 238000005201 scrubbing Methods 0.000 description 1
- 239000010902 straw Substances 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Landscapes
- Filtration Of Liquid (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、被処理液のろ過に用いられるプレコート式
ろ過方法に関し、特に原子力発電所などから出る排水の
ろ過に用いることができるプレコート式ろ過方法に関す
る。[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a pre-coat type filtration method used for filtering a liquid to be treated, and in particular a pre-coat type filtration method that can be used for filtering wastewater from nuclear power plants, etc. Regarding the method.
従来原子力発電所で使用され、あるいはそこから排出さ
れる水に含まれる懸濁状、あるいはイオン状の不純物の
除去には、強酸性カチオン交換樹脂粉末と強塩基性アニ
オン交換樹脂粉末とを混合してろ過助剤として用いるプ
レコート式ろ過方法が用いられている。To remove suspended or ionic impurities contained in water conventionally used in or discharged from nuclear power plants, strongly acidic cation exchange resin powder and strongly basic anion exchange resin powder are mixed. A pre-coat type filtration method is used in which the filter is used as a filter aid.
そして、このろ過助剤でプレコートする際、ろ過助剤を
所定の低濃度のスラリーとしてろ過エレメント上にプレ
コートすれば、高分子電解質を使用せずに良好なプレコ
ート／Ｍを形成することができる。When precoating with this filter aid, if the filter aid is precoated on the filtration element as a predetermined low concentration slurry, a good precoat/M can be formed without using a polymer electrolyte.
この強酸性カチオン交換樹脂粉末と強塩基性アニオン交
換樹脂粉末とをろ過助剤として用いるプレコート式ろ過
方法は、懸濁状あるいはイオン状の不純物をよく除去〒
き、水質の向上に効果があるが、使用済みのろ過助剤自
身が廃棄物として発生する。この使用済みのろ過助剤の
処分はアスファルト等で固めてドラム缶詰めとしている
が、容積が大きくなってしまう。また、焼却しようとす
ると、強酸性カチオン交換樹脂はほとんどがイオン交換
基に硫黄を含む（−８ｏ、Ｈ）型のもので、焼却のさい
にはＳＯｘを発生するため、説伏装置等の硫黄対策が必
要〒あった。This pre-coat filtration method, which uses strongly acidic cation exchange resin powder and strongly basic anion exchange resin powder as filter aids, effectively removes suspended or ionic impurities.
Although it is effective in improving water quality, the used filter aid itself is generated as waste. This used filter aid is disposed of by solidifying it with asphalt or the like and canning it in drums, but the volume becomes large. In addition, if you try to incinerate it, most of the strongly acidic cation exchange resins are of the (-8o, H) type that contain sulfur in their ion exchange groups, and they generate SOx when incinerated, so the sulfur Countermeasures were needed.
そこで、この発明は、強酸性カチオン交換樹脂粉末の代
りにカルダン酸基をイオン交換基とする弱酸性カチオン
交換樹脂粉末を用いてろ過助剤を形成し、それをプレコ
ートするものフ、それによって、強酸性カチオン交換樹
脂粉末を用いる場合に比べ、不純物の除去量が増大し、
かつろ過助剤の成分に硫黄を含まないため簡単に焼却〒
きろようになったものである。Therefore, this invention forms a filter aid using a weakly acidic cation exchange resin powder having a cardanic acid group as an ion exchange group instead of a strongly acidic cation exchange resin powder, and pre-coats it. Compared to using strongly acidic cation exchange resin powder, the amount of impurities removed increases,
And since the filter aid does not contain sulfur, it can be easily incinerated.
This is how it became.
すなわち、この発明は、イオン交換基としてカルダン酸
基を持つ弱酸性樹脂粉末からなるカチオン交換体、およ
び強塩基性樹脂粉末からなるアニオン交換体をろ過助剤
として使用し、こわらの混合物のろ過助剤を低濃度のス
ラリーとしたものでろ過エレメント上にプレコートし、
その層の外側から内側に被処理液を通過することにより
被処理液中の不純物を除去することを特徴とするプレコ
ート式ろ過方法マある。That is, this invention uses a cation exchanger made of a weakly acidic resin powder having a cardanic acid group as an ion exchange group, and an anion exchanger made of a strongly basic resin powder as filter aids, and is capable of filtering a mixture of stiff straw. Pre-coat the filtration element with a low-concentration slurry of the auxiliary agent,
There is a precoat type filtration method characterized in that impurities in the liquid to be treated are removed by passing the liquid to be treated from the outside to the inside of the layer.
この発明で用いろイオン交換基としてカルダン酸基を持
つ弱酸性樹脂粉末からなるカチオン交換体、および強塩
基性樹脂粉末アニオン交換体としては、従来から知られ
ているカルボン酸型弱酸性カチオン交換樹脂および強塩
基性アニオン交換樹脂の粉末状のものをそのまま用いう
るものであって、これら交換体における樹脂粉末の平均
粒度は、プレコート層を有効に形成させるために５０〜
１００μの範囲とするのがよい。The cation exchanger made of a weakly acidic resin powder having a cardanic acid group as an ion exchange group and the strongly basic resin powder anion exchanger used in this invention are conventionally known carboxylic acid type weakly acidic cation exchange resins. and strongly basic anion exchange resins in powder form can be used as they are, and the average particle size of the resin powder in these exchangers is 50 to 50 to form a precoat layer effectively.
The range is preferably 100μ.
ろ過助剤中の両交換体の混合比率は、カチオン交換体の
乾燥重量／アニオン交換体の乾燥ｉｔの比で、１／２〜
３／１とするのが好ましい。The mixing ratio of both exchangers in the filter aid is the ratio of dry weight of cation exchanger/dry weight of anion exchanger, from 1/2 to
Preferably, the ratio is 3/1.
また、このろ過助剤をろ過エレメント上にプレコートす
るにさいしては、ろ過助剤を所定の低濃度のスラリーと
してプレコートを行うのがよいが、そのさいのスラリー
濃度はろ過助剤の乾燥重量で０．０１〜０．０５：Ｔｈ
量％とするのが適している。In addition, when precoating this filter aid onto the filter element, it is best to precoat the filter aid as a slurry with a predetermined low concentration, but the slurry concentration at this time is determined by the dry weight of the filter aid. 0.01~0.05:Th
It is appropriate to use the amount as a percentage.
次に、この発明のプレコート式ろ過方法におけるプレコ
ートの形成やろ過の態様を図面によって説明する。Next, aspects of precoat formation and filtration in the precoat type filtration method of the present invention will be explained with reference to the drawings.
ろ過助剤供給タンク４にろ過助剤と水を入れてかく拌機
９でよ（混合する。プレコートポンプ５を起動し、プレ
コートタンク３からプレコートポン７″５を経てろ過器
１に至る流れを生ずる。ろ過助剤供給水ライン１３かも
供給水を流し、ろ過助剤供給タンク４からエゼンタ６に
よりろ過助剤をｆＶココ−ライン１５に送入して所定の
低濃度のスラリーを形成してろ過器１へ送り、ろ過器１
のろ過エレメント２の上にプレコートする。８はろ過助
剤供給水の流量を知るための流量計）ある。Put the filter aid and water into the filter aid supply tank 4 and mix them with the stirrer 9. Start the pre-coat pump 5 and start the flow from the pre-coat tank 3 to the filter 1 via the pre-coat pump 7''5. The filter aid supply water line 13 also flows the supply water, and the filter aid is sent from the filter aid supply tank 4 to the fV coco line 15 by the efientor 6 to form a predetermined low concentration slurry and filter it. Send to vessel 1, filter 1
Pre-coat on top of the filter element 2. 8 is a flow meter for determining the flow rate of the filter aid supply water.
プレコートの完了後、プレコートボン：ｒ５を停止し、
保持ポンプ２２を起動してろ過器１に入り、さらに保持
ポンプ２２へと戻る保持ライン２６の流れを生じさせ、
プレコートを停止する。なお、保持ライン２６の流れが
ないとプレコートが剥離する危険がある。After the pre-coating is completed, stop the pre-coating bong: r5,
activating the retention pump 22 to create flow in the retention line 26 into the filter 1 and back to the retention pump 22;
Stop precoat. Note that if the holding line 26 does not flow, there is a risk that the precoat will peel off.
次いマ、被処理水人口１１かも被処理水をろ過器１へ送
り、処理水出口１２かも処理水を導出するようにすると
共建、保持ボン２′２２を停止して、ろ過の作業を行う
。７は処理水の流ｌ−を知るための流量計であめ。Next, when the treated water population 11 is sent to the filter 1 and the treated water is brought out from the treated water outlet 12, the holding bong 2'22 is stopped and the filtration work is started. conduct. 7 is a flow meter to know the flow rate of treated water.
ろ過の作条が進むにつれて、不純物がろ過エレメント上
に堆積するためろ過に要する圧力が増し、その差圧￥差
出計１０で測定するが、その差圧が１．７５ｋｙ／ｃ７
ｄとなったら、保持ポンプ２２を起動し、禎処理水人口
１１および処理水出口１２を止める。As the filtration process progresses, impurities accumulate on the filtration element, so the pressure required for filtration increases, and the differential pressure is measured with a differential meter 10, and the differential pressure is 1.75 ky/c7.
d, the holding pump 22 is started, and the treated water intake 11 and the treated water outlet 12 are stopped.
ろ過器１の上部に空気人口１７がら空気を導入し、ドー
ムドレン１８から水を排出する。水の排出が終ったなら
ばドームドレン１８を閉め、ろ過器１の上部に空気を圧
力が６〜７に９／ａｄとなるまで貯める。空気が貯まっ
たら、逆洗出口２０を開け、使用済みのろ過助剤を空気
逆洗により排出する。その後管板ベンＰ１９の管路を開
け、洗浄水ライン２４７））ら洗浄水を入れながら、空
気人口２１からの空気によりスクラビングし、ろ過エレ
メント２を洗浄する。洗浄水がろ過器１中に一杯となっ
たら、再びろ過器１の上部から空気を入れ空気逆洗して
排水する。その後、ろ過器１中を満水として次サイクル
のろ過運転をする。Air is introduced into the upper part of the filter 1 through an air port 17, and water is discharged from a dome drain 18. When the water has been discharged, the dome drain 18 is closed and air is stored in the upper part of the filter 1 until the pressure reaches 6 to 7 to 9/ad. Once the air has accumulated, the backwash outlet 20 is opened and the used filter aid is discharged by air backwashing. Thereafter, the pipe line of the tube plate vent P19 is opened, and while washing water is poured in from the washing water line 247)), scrubbing is performed with air from the air outlet 21 to wash the filtration element 2. When the filter 1 is full of washing water, air is again introduced from the top of the filter 1 to backwash the water and drain the water. Thereafter, the filter 1 is filled with water for the next cycle of filtration operation.
なお、図面において、１４はプレコートタンク３に連結
するプレコートラインｆあり、１６はペント〒ある。In the drawings, 14 is a precoat line f connected to the precoat tank 3, and 16 is a pent.
ここ！、この発明の実施例を示すが、この発明はこれに
限定されるものではない。here! , shows an example of the present invention, but the present invention is not limited thereto.
実施例におけろ実験条件およびそれに基づく実験結果は
次の表１に示すとおり〒ある。Experimental conditions and experimental results based on the experimental conditions in Examples are shown in Table 1 below.
なお、不純物として実際のプラントＩＣ使われろ水を模
擬して鉄クラツドを、入口濃度（Ｆｅ基準）６〜６ｐｐ
ｍとして入れた水を禎処理水とした。In addition, as an impurity, iron cladding was used to simulate the effluent of an actual plant, and the inlet concentration (Fe standard) was 6 to 6 pp.
The water added as m was used as the Tei-treated water.
また、ろ過寿命、鉄除去率は、強酸性カチオン交換樹脂
粉末を使用した場合の結果を１としたものを基準として
表わした。In addition, the filtration life and iron removal rate were expressed based on the results obtained when a strongly acidic cation exchange resin powder was used as 1.
ろ過寿命は、通水差圧が１．７５ ｋｇ／ｃ！７ｔとな
るま〒の補足鉄量の値を比較した。The filtration life is as long as the water flow differential pressure is 1.75 kg/c! We compared the values of supplementary iron amount until it reached 7 tons.
表 １
なお、試験の過程で、ろ過助剤スラリー濃度、カチオン
交換樹脂粉末の粒度は従来と同等であるとプレコート性
≠１良いことがわかった。Table 1 In the course of the test, it was found that the precoating property was good (≠1) when the concentration of the filter aid slurry and the particle size of the cation exchange resin powder were the same as conventional ones.
上表によれば、この発明では従来技術と比べて鉄除去率
は同程度であるが、ろ過寿命が１．１〜２．０倍も増え
る。これは、強酸性カチオン交換樹脂粉末と比べ、弱酸
性カチオン交換樹脂粉末の場合はプレコートｔｓの厚み
が厚くなっており、体積ろ過がしやすい性状となり、ろ
過寿命が増えるものと考えられろ。According to the table above, in this invention, the iron removal rate is comparable to that of the prior art, but the filtration life is increased by 1.1 to 2.0 times. This is thought to be because the thickness of the precoat TS is thicker in the case of weakly acidic cation exchange resin powder compared to strongly acidic cation exchange resin powder, which makes volumetric filtration easier and increases the filtration life.
この発明では、ろ過助剤の一種に、従来の強α性カチオ
ン交換樹脂粉末の代りに、カルゼン酸型弱醒性カチオン
交換樹脂粉末を用いろことによって、処理水の不純物の
リーク値は同等に維持しながら、ろ過寿命を長くするこ
とがマきる。また（この弱敵性カチオン交換樹脂粉末は
硫黄を含まないから、使用後に硫黄対策を要しないで焼
却することができ、最終廃棄物量を低減することがｔき
ろものマある。そして、ろ過寿命が長くなることにより
、全体の鉄除去量もそれに比例して１．１〜２．０倍と
増える。In this invention, the leakage value of impurities in treated water can be maintained at the same level by using calzenic acid-type weakly warming cation exchange resin powder as a kind of filter aid instead of the conventional strong alpha cation exchange resin powder. It is possible to extend the filtration life while maintaining the filtration life. In addition, since this weakly hostile cation exchange resin powder does not contain sulfur, it can be incinerated after use without the need for sulfur countermeasures, reducing the amount of final waste. Also, the filter life is long. As a result, the total amount of iron removed increases proportionally by 1.1 to 2.0 times.
第１図は、この発明を実施するのに用いる装置の一例を
示したもの〒ある。
１：ろ過器 ２：ろ過エレメント３ニブレコード
タンク ４：ろ過助剤供給タンク５ニブレコードポンプ
６ニエゼクタ
９：攪拌機 １１：被処理水入口１２：処理水出
口 １６：ろ過助剤供給水ライン１５ニブレコード
ライン
ｉ・ ・
代理人 弁理士（９１０７）佐々木 清 隆１ 、１（
ほか６名）FIG. 1 shows an example of the apparatus used to carry out the invention. 1: Filter 2: Filtration element 3 Nib record tank 4: Filter aid supply tank 5 Nib record pump 6 Ejector 9: Stirrer 11: Treated water inlet 12: Treated water outlet 16: Filter aid supply water line 15 Nib record Line i... Agent Patent Attorney (9107) Kiyotaka Sasaki 1, 1 (
and 6 others)
Claims (4)
脂粉末からなるカチオン交換体、および強塩基性樹脂粉
末からなるアニオン交換体をろ過助剤として使用し、こ
れらの混合物のろ過助剤を低濃度のスラリーとしたもの
でろ過エレメント上にプレコートし、その層の外側から
内側に被処理液を通液することにより被処理液中の不純
物を除去することを特徴とするプレコート式ろ過方法。(1) A cation exchanger made of a weakly acidic resin powder having a carboxylic acid group as an ion exchange group and an anion exchanger made of a strongly basic resin powder are used as filter aids, and the filter aid of a mixture of these is used as a filter aid. A pre-coating filtration method characterized by precoating a filtration element with a concentrated slurry and removing impurities in the liquid to be treated by passing the liquid to be treated from the outside to the inside of the layer.
脂粉末からなるカチオン交換体の平均粒径が５０〜１０
０μである特許請求の範囲第１項記載のプレコート式ろ
過方法。(2) The average particle size of the cation exchanger made of weakly acidic resin powder having carboxylic acid groups as ion exchange groups is 50 to 10
The precoat type filtration method according to claim 1, which has a particle diameter of 0μ.
、カチオン交換体の乾燥重量／アニオン交換体の乾燥重
量の比で１／２〜３／１とすることからなる特許請求の
範囲第１項記載のプレコート式ろ過方法。(3) Claim 1, wherein the mixing ratio of the cation exchanger and the anion exchanger is 1/2 to 3/1 in terms of dry weight of cation exchanger/dry weight of anion exchanger. Pre-coat filtration method described in section.
剤のスラリー濃度は、スラリー中のろ過助剤が乾燥重量
で０．０１〜０．０５重量％とすることからなる特許請
求の範囲第１項記載のプレコート式ろ過方法。(4) The slurry concentration of the filter aid when precoating on the filter element is 0.01 to 0.05% by dry weight of the filter aid in the slurry, as claimed in claim 1. Pre-coated filtration method as described.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61207993A JPS6365924A (en) | 1986-09-05 | 1986-09-05 | Precoating type filtration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61207993A JPS6365924A (en) | 1986-09-05 | 1986-09-05 | Precoating type filtration |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6365924A true JPS6365924A (en) | 1988-03-24 |
Family
ID=16548900
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61207993A Pending JPS6365924A (en) | 1986-09-05 | 1986-09-05 | Precoating type filtration |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6365924A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62250923A (en) * | 1986-04-23 | 1987-10-31 | Hitachi Ltd | Filtering method |
-
1986
- 1986-09-05 JP JP61207993A patent/JPS6365924A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62250923A (en) * | 1986-04-23 | 1987-10-31 | Hitachi Ltd | Filtering method |
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