JP2760358B2 - Filtration tower using long fiber bundle - Google Patents
Filtration tower using long fiber bundleInfo
- Publication number
- JP2760358B2 JP2760358B2 JP1173013A JP17301389A JP2760358B2 JP 2760358 B2 JP2760358 B2 JP 2760358B2 JP 1173013 A JP1173013 A JP 1173013A JP 17301389 A JP17301389 A JP 17301389A JP 2760358 B2 JP2760358 B2 JP 2760358B2
- Authority
- JP
- Japan
- Prior art keywords
- long fiber
- fiber bundle
- tower
- filtration
- filtration tower
- 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.)
- Expired - Lifetime
Links
- 239000000835 fiber Substances 0.000 title claims description 191
- 238000001914 filtration Methods 0.000 title claims description 113
- 239000000706 filtrate Substances 0.000 claims description 31
- 239000011800 void material Substances 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 37
- 239000000725 suspension Substances 0.000 description 15
- 238000011001 backwashing Methods 0.000 description 14
- 239000000243 solution Substances 0.000 description 13
- 239000007788 liquid Substances 0.000 description 12
- 239000011550 stock solution Substances 0.000 description 9
- 230000000694 effects Effects 0.000 description 7
- 239000012530 fluid Substances 0.000 description 7
- 239000002351 wastewater Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 230000002093 peripheral effect Effects 0.000 description 6
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 5
- 238000011109 contamination Methods 0.000 description 5
- 238000012856 packing Methods 0.000 description 5
- 230000007423 decrease Effects 0.000 description 3
- 229920002972 Acrylic fiber Polymers 0.000 description 2
- 239000004952 Polyamide Substances 0.000 description 2
- 238000007596 consolidation process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229920002647 polyamide Polymers 0.000 description 2
- 229920000728 polyester Polymers 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000006228 supernatant Substances 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
- 239000012209 synthetic fiber Substances 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
- 210000002268 wool Anatomy 0.000 description 1
Landscapes
- Filtering Materials (AREA)
- Filtration Of Liquid (AREA)
Description
【発明の詳細な説明】 ＜産業上の利用分野＞ 本発明は上下水道水、下水、河川水、湖沼水、凝集沈
殿上澄水、各種工程中間水、製紙工程における回収水の
ような各種回収水、各種廃水、生物処理装置の処理水あ
るいは有価物含有液、酒、油等の原液中の懸濁物を高流
速で除去するための長繊維束を用いた濾過塔に関するも
のである。DETAILED DESCRIPTION OF THE INVENTION <Industrial application field> The present invention relates to various recovered waters such as water supply and sewage water, sewage, river water, lake water, coagulated sedimentation supernatant water, intermediate water for various processes, and recovered water in a papermaking process. The present invention relates to a filtration tower using a long fiber bundle for removing a suspended matter in a stock solution such as various wastewaters, treated water of a biological treatment apparatus or a liquid containing valuables, sake, oil, or the like at a high flow rate.
＜従来の技術＞ 本願出願人は先に特開昭62−146989および特願昭63−
131715に長繊維束を用いた濾過塔を開示した。<Prior Art> The applicant of the present application has previously described Japanese Patent Application Laid-Open No.
No. 131715 discloses a filtration tower using a long fiber bundle.
当該濾過塔は第３図に示したように、濾過塔（イ）下
部に多孔板等の支持体（ロ）を横設し、当該支持体
（ロ）に長繊維束（ハ）の下端を固定するとともにその
上端を自由端として、濾過塔（イ）内部全体に長繊維束
（ハ）を立設したもので、懸濁物を含む原液を濾過する
に際しては、弁（ニ）および弁（ホ）を開口するととも
に原液流入管（ヘ）から原液を流入して長繊維束（ハ）
に対して下降流で原液を通し、当該長繊維束の空隙部で
懸濁物を捕捉し、濾過液を支持体（ロ）の下方部に設け
られている濾過液流出管（ト）から取り出すものであ
る。As shown in FIG. 3, the filtration tower has a support (b) such as a perforated plate provided horizontally below the filtration tower (b), and the lower end of the long fiber bundle (c) is placed on the support (b). The filter is fixed and its upper end is set as a free end. A long fiber bundle (c) is erected on the whole inside of the filtration tower (a). When filtering the undiluted solution containing the suspension, the valve (d) and the valve ( E) and the undiluted solution flows in from the undiluted solution inflow pipe (f) and the long fiber bundle (c)
, The undiluted solution is passed in a downward flow, the suspended matter is trapped in the void portion of the long fiber bundle, and the filtrate is taken out from the filtrate outflow pipe (g) provided below the support (b). Things.
また懸濁物の捕捉により圧力損失が増加した際に、弁
（ニ）および弁（ホ）を閉じるとともに、弁（チ）およ
び（リ）を開口して、空気流入管（ヌ）から圧縮空気を
流入し、長繊維束（ハ）を撹拌、振動させ、次いで圧縮
空気を流入したまま、あるいは流入を止めて弁（ル）を
開けて、速洗水流入管（ヲ）から逆洗水を流入して懸濁
物を逆流水排出管（ワ）から流出するものである。When the pressure loss increased due to the trapping of the suspended matter, the valve (d) and the valve (e) were closed, and the valves (h) and (l) were opened, and compressed air was introduced from the air inlet pipe (nu). And agitate and oscillate the long fiber bundle (c). Then, with the compressed air flowing in, or stop the flow and open the valve (l) to flow backwash water from the quick-wash water inlet pipe (ヲ). Then, the suspension is discharged from the backflow water discharge pipe (W).
当該濾過塔は通常太さが10μ〜80μのアクリル繊維、
ポリエステル繊維、ポリアミド繊維塔の非撚単繊維の重
合体である長さ0.4m〜3.0mの長繊維束を濾過塔内に比較
的密に充填することにより直立させているので、圧力損
失をそれ程大きくさせずに、高流速で懸濁物を濾過する
ことができる。The filtration tower is usually an acrylic fiber having a thickness of 10 μ to 80 μ,
A long fiber bundle of 0.4 m to 3.0 m long, which is a polymer of non-twisted monofilaments of polyester fiber and polyamide fiber towers, is filled up relatively tightly in the filtration tower so as to be upright. The suspension can be filtered at a high flow rate without increasing the size.
また長繊維束の下端が固定されているので逆洗の際に
高流速の圧縮空気あるいは逆洗水を上昇流で流入した場
合、長繊維束は下端を固定部とした吹き流しのようにな
って伸長するとともに長繊維束が振動するので、捕捉し
た懸濁物を効果的に除くことができる。In addition, since the lower end of the long fiber bundle is fixed, when high-speed compressed air or backwash water flows in ascending flow at the time of backwashing, the long fiber bundle becomes like a streamer with the lower end fixed. Since the long fiber bundle vibrates as it elongates, the captured suspension can be effectively removed.
ところが本濾過塔を開発した当初の長繊維束の下端の
固定は第４図に示すごとく、長繊維束（ハ）を折り曲
げ、折り曲げ部をリング（カ）でまとめ、支持体（ロ）
の各孔（ヨ）を塞ぐように、当該折り曲げ部を位置さ
せ、リング（カ）に連通するボルト（タ）を用いて支持
棒（レ）とナット（ソ）で長繊維束（ハ）を固定した構
造であったので、以下に述べるような欠点を有してい
た。However, as shown in FIG. 4, the lower end of the long fiber bundle was fixed at the beginning of the development of this filtration tower, the long fiber bundle (c) was bent, the bent portion was gathered by a ring (f), and the support (b)
Position the bent portion so as to cover each hole (Y), and use a bolt (T) communicating with the ring (F) to support the long fiber bundle (C) with the support rod (Le) and nut (S). Since it had a fixed structure, it had the following drawbacks.
すなわちこのような構造の場合、リング（カ）でまと
めた部分の長繊維束はかなり密集しており、かつ当該部
分には濾過中に必ず液が通過するので、当該密集部に懸
濁物が詰まり易く、またひとたび懸濁物が詰まると前記
逆洗を実施しても中々これを除去することができなかっ
た。That is, in the case of such a structure, the long fiber bundles gathered by the ring (f) are quite dense and the liquid always passes through the part during the filtration, so that the suspended matter is collected in the dense part. The suspension was easily clogged, and once the suspension was clogged, it was not possible to remove the backwash even if the above-mentioned back washing was performed.
何故ならば第４図に示したような構造においては、各
孔（ヨ）から圧縮空気あるいは逆洗水等の流体を通過さ
せても多孔板（ロ）の上面と長繊維束（ハ）との接触部
から優先的に流体が通過してしまい、肝心な部分、すな
わち前記密集部に流体が通過しにくいからである。また
前記ナット（ソ）を強く締め付け、各孔（ヨ）と長繊維
束（ハ）の接触度を大きくした場合は、前記密集部に懸
濁物が比較的詰まっていない長繊維束（ハ）を有する孔
（ヨ）から優先的に流体が通過してしまい、洗浄したい
部分、すなわち前記密集部に懸濁物が詰まっている長繊
維束（ハ）を有する孔（ヨ）に流体が通過しない現象も
生ずる。This is because, in the structure shown in FIG. 4, even when a fluid such as compressed air or backwash water is passed through each hole (Y), the upper surface of the perforated plate (B) and the long fiber bundle (C) are not This is because the fluid preferentially passes through the contact portion, and it is difficult for the fluid to pass through the essential portion, that is, the dense portion. When the nut (so) is strongly tightened to increase the degree of contact between each hole (Y) and the long fiber bundle (C), the long fiber bundle (C) in which the dense portion is relatively free from clogging with the suspension. The fluid preferentially passes through the hole (Y) having the flow path, and the fluid does not pass through the hole (Y) having the long fiber bundle (C) in which the suspended portion is clogged with the portion to be washed, that is, the dense portion. A phenomenon also occurs.
また、長繊維束（ハ）の下端固定部付近は、本来洗浄
流体の流入によってそれ程振動する部分ではないため、
たとえ洗浄流体が理想的に流れたとしてもこの部分に捕
捉された懸濁物の除去は難しく、よく濾過を続行するう
ちに当該部分の目詰まりが少しづつ進行するのは避けら
れない状況にある。Also, the vicinity of the lower end fixing portion of the long fiber bundle (c) is not originally a portion that vibrates so much due to the inflow of the cleaning fluid.
Even if the washing fluid flows ideally, it is difficult to remove the suspended matter trapped in this part, and it is inevitable that the clogging of the part will gradually progress while continuing filtration well. .
したがってこのような状態が続くと前記密集部あるい
はその近傍の、要するに長繊維束固定部付近に懸濁物が
徐々に残留し、そのために濾過における初期差圧を次第
に上昇させ、場合によっては濾過工程そのものに重大な
支障を及ぼすこととなる。Therefore, if such a state continues, the suspension gradually remains at or near the dense portion, that is, near the fixing portion of the long fiber bundle, and therefore the initial differential pressure in the filtration gradually increases, and in some cases, the filtration step It will have a serious hindrance to itself.
また、上記濾過塔には以下のような別の問題点もあ
る。Further, the above-mentioned filtration tower has another problem as follows.
当該濾過塔においては使用する長繊維束の各単繊維の
太さによって得られる濾過液の品質、および圧力損失の
度合が異なり、これらの関係は以下のごとくである。In the filtration tower, the quality of the obtained filtrate and the degree of the pressure loss differ depending on the thickness of each single fiber of the long fiber bundle used, and these relationships are as follows.
つまり、比較的細い単繊維の集合体である長繊維束を
用いた場合、濾過液の品質は向上するものの、繊維その
もの腰が弱いため濾過中において懸濁物が捕捉されるに
つれて長繊維束の直立が維持できず、特に濾過塔の下方
部において長繊維束の圧密化が進んで圧力損失の上昇は
早くなり、その結果濾過時間が短くなり、場合によって
は洗浄が不充分になる等の欠点を有している。In other words, when a long fiber bundle, which is an aggregate of relatively thin single fibers, is used, although the quality of the filtrate is improved, the fiber itself is weak and the long fiber bundle is captured as the suspended matter is captured during filtration. Uprights cannot be maintained, and the pressure loss rises faster due to the consolidation of long fiber bundles, especially in the lower part of the filtration tower, resulting in shorter filtration times and, in some cases, insufficient washing. have.
一方、比較的太い単繊維の集合体である長繊維束を用
いた場合、繊維そのものの腰が強いので、長繊維束の圧
密化はそれ程生じず、圧力損失の上昇は遅く、濾過時間
は長くとれるが、濾過液の品質が低下する欠点を有して
いる。On the other hand, when a long fiber bundle, which is an aggregate of relatively thick single fibers, is used, since the fibers themselves are strong, the consolidation of the long fiber bundle does not occur so much, the pressure loss rises slowly, and the filtration time is long. However, it has a drawback that the quality of the filtrate decreases.
したがって、濾過液の品質を可及的に向上させるとと
もに濾過時間も長くするという要求に対しては、これに
応じることが困難であった。Therefore, it has been difficult to meet the demand to improve the quality of the filtrate as much as possible and to increase the filtration time.
＜発明が解決しようとする問題点＞ 本発明は長繊維束を用いた従来の濾過塔における上述
したような問題点を解決するもので、長繊維束固定部付
近における懸濁物の残留、蓄積による汚染を確実に防止
し得る濾過塔を提供することを目的とするものである。<Problems to be Solved by the Invention> The present invention solves the above-mentioned problems in a conventional filtration tower using a long fiber bundle, and the residual and accumulation of the suspended matter near the fixed portion of the long fiber bundle. It is an object of the present invention to provide a filtration tower capable of reliably preventing contamination by water.
また、本発明の他の目的は長繊維束固定部における汚
染を防止できることに加えて、濾過液の品質を可及的に
向上させることができ、かつ濾過時間を長くできる濾過
塔を提供するところにある。Another object of the present invention is to provide a filtration tower capable of preventing the contamination in the long fiber bundle fixing portion, improving the quality of the filtrate as much as possible, and extending the filtration time. It is in.
＜問題点を解決するための手段＞ 上記目的を達成するためになされた本発明よりなる長
繊維束を用いた濾過塔は、塔内下部に設けた支持体に長
繊維束の下端を固定するとともにその上端を自由端とし
て、塔内部全体に複数の長繊維束を立設した濾過塔の上
方から原液を流入して長繊維束の上端から下端に向かっ
て原液を通すことにより、長繊維束内の空隙部で懸濁物
を捕捉する濾過塔において、前記支持体のやや上方の長
繊維束群内に、濾過液を集液するためのコレクタを設け
たことを特徴とするものである。<Means for Solving the Problems> In a filtration tower using a long fiber bundle according to the present invention which has been made to achieve the above object, a lower end of the long fiber bundle is fixed to a support provided at a lower part in the tower. With the upper end as the free end, the undiluted solution flows in from above the filtration tower having a plurality of long fiber bundles erected throughout the inside of the tower, and the undiluted solution flows from the upper end to the lower end of the long fiber bundle. In a filtration tower for trapping a suspended material in a void inside the collector, a collector for collecting a filtrate is provided in the long fiber bundle group slightly above the support.
また、第２請求項に記載した発明は、上記構成の濾過
塔において、塔内中央部に比較的細い単繊維の集合体か
らなる第１の長繊維束を配するとともに、その周囲に当
該第１の長繊維束に用いた単繊維より太い単繊維の集合
体からなる第２の長繊維束を配し、かつ前記第１の長繊
維束群内に、濾過液を集液するためのコレクタを設けた
ことを特徴とする長繊維束を用いた濾過塔である。Further, according to the invention described in the second aspect, in the filtration tower having the above-described configuration, a first long fiber bundle composed of an aggregate of relatively thin single fibers is arranged in a central portion of the tower, and the first long fiber bundle is arranged around the first bundle. A collector for disposing a second long fiber bundle composed of an aggregate of single fibers thicker than the single fiber used for the one long fiber bundle, and collecting a filtrate in the first long fiber bundle group And a filtration tower using a long fiber bundle.
以下に本発明を詳細に説明する。 Hereinafter, the present invention will be described in detail.
第１図は本発明の濾過塔の実施態様の一例を示す模式
断面図であり、濾過塔１内の下方部に多孔板からなる支
持体２を横設し、当該支持体２に長繊維束３の下端を固
定するとともに、当該長繊維束３の上端を自由端とし、
長繊維束３を塔内に比較的密に充填することにより、濾
過塔１内において長繊維束３を立設したものである。FIG. 1 is a schematic cross-sectional view showing an example of an embodiment of a filtration tower of the present invention. A support 2 made of a perforated plate is provided horizontally below a filtration tower 1, and a long fiber bundle is provided on the support 2. 3 is fixed, and the upper end of the long fiber bundle 3 is a free end.
The long fiber bundle 3 is erected in the filtration tower 1 by packing the long fiber bundle 3 relatively densely in the tower.
また、濾過塔１の上方に原液流入管４を設け、当該原
液流入管４に逆洗水排出管５を分岐して連通する。Further, a stock solution inflow pipe 4 is provided above the filtration tower 1, and a backwash water discharge pipe 5 is branched and communicated with the stock solution inflow pipe 4.
更に、支持体２の下方に逆洗空気流入管６を連通する
とともに当該逆洗空気流入管６に逆洗水流入管７を分岐
して連通する。Further, a backwash air inflow pipe 6 is communicated below the support 2 and a backwash water inflow pipe 7 is branched to communicate with the backwash air inflow pipe 6.
本発明の特徴は、上記構成の濾過塔において、前記支
持体２のやや上方の長繊維束３群内に、濾過液を集液す
るためのコレクタ８を設けた点にある。当該コレクタ８
は濾過液を集液し得る構造のものであればいかなる形状
のものでもよく、たとえば周壁に多数の集水口を穿設し
た中空管を十字形に連結したもの等、公知のコレクタを
用いることができ、第１図にはこのような構造のコレク
タを塔内に横設したところを示してある。また、９は当
該コレクタ８に連通する濾過液流出管である。なお、10
〜14はそれぞれ弁を示す。A feature of the present invention is that a collector 8 for collecting a filtrate is provided in the group of long fiber bundles 3 slightly above the support 2 in the filtration tower having the above configuration. The collector 8
Any shape may be used as long as it has a structure capable of collecting the filtrate, and a known collector, such as a hollow pipe having a number of water collection holes formed in the peripheral wall connected in a cross shape, may be used. FIG. 1 shows a collector having such a structure arranged laterally in a tower. Reference numeral 9 denotes a filtrate outflow pipe communicating with the collector 8. Note that 10
Reference numerals 14 each denote a valve.
本実施態様の濾過塔によれば、長繊維束固定部付近の
汚染を確実に防止することができる。According to the filtration tower of this embodiment, it is possible to reliably prevent contamination near the long fiber bundle fixing portion.
次に、第２図は本発明の第２請求項に係わる濾過塔の
実施態様を示す模式断面図であり、当該濾過塔１の特徴
は、濾過塔１内に立設する長繊維束として、繊維の太さ
がそれぞれ異なる２種類の長繊維束を使用し、比較的細
い単繊維の集合体からなる第１の長繊維束3Aを濾過塔１
内の中央部に配するとともに、その周囲（第２図におい
て外側）に、当該第１の長繊維束3Aに用いた単繊維より
太い単繊維の集合体からなる長繊維束3Bを配し、かつ前
記第１の長繊維束3A群内に、濾過液を集液するためのコ
レクタ８を設けたところにある。本実施態様の濾過塔に
おいては、コレクタ８として、たとえば周壁に多数の集
液口を穿設した中空管を使用し、当該中空管を第２図に
示したごとく第１の長繊維束3A群内のほぼ中央に立設す
るとよく、その理由は後述する。Next, FIG. 2 is a schematic cross-sectional view showing an embodiment of the filtration tower according to the second claim of the present invention. The feature of the filtration tower 1 is as a long fiber bundle standing upright in the filtration tower 1. Using two types of long fiber bundles, each having a different fiber thickness, a first long fiber bundle 3A, which is an aggregate of relatively thin single fibers, is passed through a filtration tower 1
A long fiber bundle 3B composed of an aggregate of single fibers thicker than the single fibers used for the first long fiber bundle 3A is arranged around the center portion (outside in FIG. 2), Further, a collector 8 for collecting the filtrate is provided in the first long fiber bundle 3A group. In the filtration tower of the present embodiment, for example, a hollow tube having a large number of liquid collecting ports formed in the peripheral wall is used as the collector 8, and the hollow tube is connected to the first long fiber bundle as shown in FIG. It is good to stand almost in the center of the 3A group, and the reason will be described later.
なお、他の部分は前記濾過塔の構成と同じであるの
で、詳しく説明は省略する。The other parts are the same as those of the above-mentioned filtration tower, so that the detailed description is omitted.
本実施態様の濾過塔によれば、第１図に示した濾過塔
の場合と同様に長繊維束固定部付近の汚染を防止できる
とともに、濾過液の品質を可及的に向上させるという要
求と、濾過時間を長くするという要求を、同時に満足さ
せることが可能となる。According to the filtration tower of the present embodiment, as in the case of the filtration tower shown in FIG. 1, it is possible to prevent contamination near the long fiber bundle fixing portion and to improve the quality of the filtrate as much as possible. In addition, it is possible to simultaneously satisfy the requirement of increasing the filtration time.
＜作用＞ 以下に本濾過塔の操作を説明する。<Operation> The operation of the present filtration tower will be described below.
まず、懸濁物を含む原液を濾過するに際しては、弁10
および弁14を開口するとともにその他の弁を閉じて、原
液流入管４から原液を下降流で流入させる。原液は塔内
で立設する長繊維束３に沿って流下し、長繊維束３で形
成する空隙部で懸濁物が捕捉される。懸濁物を捕捉され
た濾過液は、長繊維束３を固定している支持体２のやや
上方に設けたコレクタ８の集液口（図示せず）からコレ
クタ８内に入り、次いで濾過液流出管９から塔外に流出
する。First, when filtering the undiluted solution containing the suspension, the valve 10
And the valve 14 is opened and the other valves are closed to allow the stock solution to flow downward from the stock solution inflow pipe 4. The undiluted solution flows down along the long fiber bundle 3 erected in the tower, and the suspended matter is captured in the void formed by the long fiber bundle 3. The filtrate in which the suspension is captured enters the collector 8 from a collecting port (not shown) of the collector 8 provided slightly above the support 2 to which the long fiber bundle 3 is fixed. It flows out of the tower from the outflow pipe 9.
このように、本発明の濾過塔においては濾過液を支持
体２のやや上方で集液して塔外に流出させることができ
るので、従来のように長繊維束３の固定部付近に液を通
流させなくてもよく、したがって当該固定部付近に懸濁
物が詰まるようなことはない。As described above, in the filtration tower of the present invention, the filtrate can be collected slightly above the support 2 and allowed to flow out of the tower. The flow does not have to be allowed to flow, so that the suspension does not become clogged near the fixing portion.
なお、原液が腐敗し易い液体であって塔内下部での液
の滞留が好ましくない場合には、濾過液の一部を従来の
ように支持体２を通過させて取り出すようにしてもよ
い。この場合、長繊維束３の固定部付近を液が通過する
ので、上述の場合に比べて当該固定部付近に懸濁物が詰
まり易くなるが、従来のように濾過液の全量を通過せす
る場合と較べればその度合は格段に少なくなり、また逆
洗によって充分に洗浄することが可能な程度のものとな
る。If the stock solution is a perishable liquid and retention of the solution in the lower part of the tower is not preferable, a part of the filtrate may be passed through the support 2 and taken out as in the related art. In this case, since the liquid passes near the fixed portion of the long fiber bundle 3, the suspension is more likely to be clogged in the vicinity of the fixed portion than in the above-described case, but allows the entire amount of the filtrate to pass as in the related art. Compared to the case, the degree is much smaller, and it is of such a degree that it can be sufficiently washed by back washing.
上述のような濾過の続行により長繊維束３の空隙部に
懸濁物が多く捕捉されると、次第に圧力損失が増大し、
圧力損失の増大に伴い、長繊維束３の下方部から直立し
ている長繊維束３が屈曲しはじめ、長繊維束３の直立す
る高さが次第に減少して行く現象が生ずる。When a large amount of suspended matter is trapped in the voids of the long fiber bundle 3 due to the continuation of the filtration as described above, the pressure loss gradually increases,
With an increase in pressure loss, the long fiber bundle 3 standing upright from the lower part of the long fiber bundle 3 starts to bend, and a phenomenon that the upright height of the long fiber bundle 3 gradually decreases occurs.
前記圧力損失の増大があらかじめ決定してある値とな
った時点で弁10および弁14を閉じて濾過を停止し、以下
の逆洗を行う。When the increase in the pressure loss reaches a predetermined value, the valves 10 and 14 are closed to stop filtration, and the following backwashing is performed.
すなわち、弁11および弁13を開口して逆洗空気流入管
６から圧縮空気を流入する。That is, the valves 11 and 13 are opened, and compressed air flows in from the backwash air inflow pipe 6.
当該圧縮空気の流入により濾過塔１内の液が撹拌され
るとともに長繊維束３が振動し、繊維間で形成されてい
た空隙が破壊されて懸濁物の集合物が破壊され、また長
繊維束３に付着していた懸濁物が剥離される。Due to the inflow of the compressed air, the liquid in the filtration tower 1 is stirred and the long fiber bundle 3 vibrates, the voids formed between the fibers are destroyed, and the aggregate of the suspended matter is destroyed. The suspension adhered to the bundle 3 is peeled off.
次いで、当該圧縮空気の流入を続行したまま、あるい
は弁13を閉じて圧縮空気の流入を止め、弁11は開口した
まま弁12を開口して逆洗水流入管７から逆洗水を流入す
る。Then, while the inflow of the compressed air is continued or the valve 13 is closed to stop the inflow of the compressed air, the valve 12 is opened and the valve 12 is opened, and the backwash water flows from the backwash water inflow pipe 7.
長繊維束３の下端が支持体２に固定されているととも
に、その上端が自由端となっているので、流入した逆洗
水の上昇流により、長繊維束３は支持体２を固定部とし
た吹き流しのようになって伸長するとともに、各繊維が
振動する。Since the lower end of the long fiber bundle 3 is fixed to the support 2 and the upper end is a free end, the long fiber bundle 3 causes the support 2 to Each fiber vibrates while elongating like a swept streamer.
したがって、長繊維束３に懸濁物が留まることができ
ず、長繊維束３から懸濁物が離脱し、当該懸濁物を多量
に含む逆洗排水が逆洗水流出管５から流出する。Therefore, the suspended matter cannot remain in the long fiber bundle 3, the suspended matter is separated from the long fiber bundle 3, and the backwash wastewater containing a large amount of the suspended matter flows out from the backwash water outflow pipe 5. .
なお、逆洗方法としては上述した方法の他に、一定の
逆洗水を上昇流で流入させながら圧縮空気を間歇的に流
入する方法でもよく、むしろこのような逆洗方法を採用
した方がおおかたの場合効果的である。In addition, as the backwashing method, in addition to the above-described method, a method of intermittently flowing compressed air while flowing a certain amount of backwashing water in an upward flow may be used. It is effective in most cases.
上記操作は第１図に示した濾過塔および第２図に示し
た濾過塔に共通のものであり、また長繊維束３の固定部
付近の汚染を確実に防止するという目的を達成すること
ができる点についても同じである。しかし、第２図に示
した濾過塔は更に、以下に述べるような別な作用効果を
奏する。The above operation is common to the filtration tower shown in FIG. 1 and the filtration tower shown in FIG. 2, and achieves the object of reliably preventing contamination near the fixed portion of the long fiber bundle 3. The same can be said about what can be done. However, the filtration tower shown in FIG. 2 has another effect as described below.
すなわち、第２図に示した濾過塔においては、前述の
ごとく長繊維束３として、繊維の太さがそれぞれ異なる
２種類の長繊維束を使用し、比較的細い単繊維の集合体
からなる第１の長繊維束3Aを濾過塔１内の中央部に配す
るとともに、その周囲に当該第１の長繊維束3Aに用いた
単繊維より太い単繊維の集合体からなる第２の長繊維束
3Bを配し、かつ前記第１の長繊維束3A群内、つまり塔内
のほぼ軸心にコレクタ８を設けてある。したがって、濾
過に際しては、塔内中央部を流れる原液は細い単繊維集
合体からなる第１の長繊維束3Aにほぼ沿って流下し、当
該長繊維束3Aと接触して品質の良好な濾過液となり、塔
の軸心に配置したコレクタ８によって集液される。一
方、塔内外周部を流れる原液は、当該外周部に配した、
前記第１の長繊維束3Aに用いた単繊維より太い単繊維の
集合体からなる第２の長繊維束3Bに沿ってまず流下し、
その後塔の軸心に配置したコレクタ８に向かう流れとな
る。第２図の点線はこのような液の流れを模式的に示し
たものであり、この場合原液はまず塔内外周部に配した
第２の長繊維束3Bと接触して比較的荒い濾過が施され、
次いで当該第２の長繊維束3Bの内側に配した第１の長繊
維束3Aと接触して比較的精密な濾過が施され、最終的に
品質の良好な濾過液となってコレクタ８に集液される。That is, in the filtration tower shown in FIG. 2, as described above, as the long fiber bundle 3, two types of long fiber bundles having different fiber thicknesses are used, and the long fiber bundle 3 is formed of an aggregate of relatively thin single fibers. The first long fiber bundle 3A is disposed in the center of the filtration tower 1 and a second long fiber bundle formed of an aggregate of single fibers thicker than the single fibers used for the first long fiber bundle 3A around the first long fiber bundle 3A.
3B, and a collector 8 is provided in the first long fiber bundle 3A group, that is, substantially at the axis in the tower. Therefore, at the time of filtration, the undiluted solution flowing in the central part of the tower flows down almost along the first long fiber bundle 3A composed of a thin single fiber aggregate, and comes into contact with the long fiber bundle 3A to obtain a high quality filtrate. And liquid is collected by a collector 8 arranged at the axis of the tower. On the other hand, the undiluted solution flowing in the outer peripheral portion of the tower is arranged on the outer peripheral portion,
First, it flows down along a second long fiber bundle 3B composed of an aggregate of single fibers thicker than the single fiber used for the first long fiber bundle 3A,
Thereafter, the flow is directed toward the collector 8 disposed at the axis of the tower. The dotted line in FIG. 2 schematically shows such a flow of the liquid. In this case, the undiluted liquid first comes into contact with the second long fiber bundle 3B arranged on the outer peripheral portion of the tower, and relatively coarse filtration is performed. Given
Then, the second long fiber bundle 3B is brought into contact with the first long fiber bundle 3A and is subjected to relatively precise filtration, and finally a high quality filtrate is collected in the collector 8. Liquid.
上述した本発明の濾過塔は、粒径の異なる２種類の粒
状瀘材を同一塔内に積層してなる、いわゆる多層濾過の
思想を部分的に採用したものであり、濾過塔の外周部を
流れる原液に対してはそれぞれの長繊維束の特質を最大
限に生かした、理想的な濾過を行うことができる。The above-mentioned filtration tower of the present invention partially adopts the concept of so-called multilayer filtration in which two types of particulate filter materials having different particle sizes are laminated in the same tower, and the outer periphery of the filtration tower is Ideal filtration can be performed on the flowing undiluted solution, making the most of the characteristics of each long fiber bundle.
すなわち、第２図に示した濾過塔によれば、細い単繊
維の集合体からなる第１の長繊維束3Aのみを塔内全体に
立設した濾過塔の場合に較べて塔全体として圧力損失を
少なくすることができるとともに濾過時間を延長するこ
とができ、かつ第１の長繊維束3Aのみを用いる濾過塔の
場合とほぼ同程度の品質の濾過液を得ることができる。That is, according to the filtration tower shown in FIG. 2, the pressure loss of the entire tower is lower than that of the filtration tower in which only the first long fiber bundle 3A composed of an aggregate of thin single fibers is erected in the whole tower. And the filtration time can be extended, and a filtrate of almost the same quality as in the case of a filtration tower using only the first long fiber bundle 3A can be obtained.
なお、上述の説明から明らかなごとく、第２図に示し
た濾過塔の場合は濾過液をなるべく濾過塔１の軸心で集
液するのが好ましく、よってこの場合のコレクタはたと
えば中空管からなるコレクタを、第２図に示したごとく
縦長に立設して用いるのがよい。As is clear from the above description, in the case of the filtration tower shown in FIG. 2, it is preferable that the filtrate be collected at the axis of the filtration tower 1 as much as possible. It is preferable to use such a collector vertically standing as shown in FIG.
次に第１図あるいは第２図に示した濾過塔に用いる長
繊維束を説明すると、当該長繊維束としては比較的高流
速の原液を下降流で通液しても、その初期においては長
繊維束の下方部がやや屈曲してその高さが若干縮み、ま
た通液の続行により下方部の屈曲部が増加し、次第に長
繊維束の直立している高さが減少していくが、長繊維束
が水平状に折れ曲がらす濾過塔内で通液中においても全
体的に直立しているような腰の強さと、充填量が必要
で、アクリル繊維、ポリエステル繊維、ポリアミド繊維
等の合成繊維、あるいは綿、羊毛等の天然繊維を用いる
ことができる。Next, the long fiber bundle used in the filtration tower shown in FIG. 1 or FIG. 2 will be described. Although the lower part of the fiber bundle is slightly bent and its height is slightly reduced, and the bent part of the lower part increases due to the continuation of the liquid passing, and the upright height of the long fiber bundle gradually decreases, Synthesize acrylic fiber, polyester fiber, polyamide fiber, etc. Fibers or natural fibers such as cotton and wool can be used.
これらの合成繊維あるいは天然繊維は通常、非撚単繊
維の集合体を用い、単繊維の太さとしては１〜80μのも
のを用いるのがよく、また繊維束の長さは通常１〜3mと
するとよい。These synthetic fibers or natural fibers usually use an aggregate of non-twisted single fibers, and the thickness of the single fibers is preferably 1 to 80 μm, and the length of the fiber bundle is usually 1 to 3 m. Good to do.
また、第２図に示した濾過塔における第１の長繊維束
3Aおよび第２の長繊維束3Bのそれぞれの単繊維の太さ、
あるいは両長繊維束の充填割合は、処理すべき原液中の
懸濁物の濃度や目標とする濾過液の品質等によって異な
るが、通常は第１の長繊維束として太さが１〜43μの単
繊維からなる長繊維束を用い、第２の長繊維束として20
〜80μの単繊維からなる長繊維束を用いるとよく、その
充填割合は第１の長繊維束を全充填量の1/4〜1/3の重量
となるように配し、第２の長繊維束を3/4〜2/3の重量と
なるようい配するか、あるいは第１の長繊維束を濾過塔
の断面積の約1/4に相当する中央部分に配し、その周囲
の約3/4に相当する部分に第２の長繊維束を配するよう
にするとよい。In addition, the first long fiber bundle in the filtration tower shown in FIG.
3A and the thickness of each single fiber of the second long fiber bundle 3B,
Alternatively, the filling ratio of both long fiber bundles varies depending on the concentration of the suspension in the stock solution to be treated, the quality of the target filtrate, and the like, but is usually 1 to 43 μm in thickness as the first long fiber bundle. A long fiber bundle made of a single fiber is used, and a second long fiber bundle is used as a second long fiber bundle.
It is preferable to use a long fiber bundle consisting of single fibers of ~ 80μ, and the filling ratio of the first long fiber bundle is set to be 1/4 to 1/3 of the total filling amount, and the second long fiber bundle is used. The fiber bundle is arranged so as to have a weight of 3/4 to 2/3, or the first long fiber bundle is arranged at a central portion corresponding to about 1/4 of the cross-sectional area of the filtration tower, and the periphery thereof is arranged. It is preferable that the second long fiber bundle is arranged at a portion corresponding to about 3/4.
＜実施例＞ 以下に本発明の実施例を説明する。<Example> An example of the present invention will be described below.
実施例−１ 直径650mm、高さ2,000mm（直線部）のステンレス製の
濾過塔の下部に多孔板を付設し、当該多孔板に太さ43
μ、長さ1,500mmのアクリル製非撚単繊維の集合体から
なる長繊維束を、充填密度65kg/m3（乾燥重量）となる
ように固定して立設し、かつ前記多孔板より300mm上方
の長繊維束群内に多孔中空管を十字形に連結してなるコ
レクタを横設した、第１図に示したような濾過塔を構成
し、当該濾過塔に懸濁物（SS濃度）が平均50mg/であ
る製紙排水を下降流線速度50m/hで通水し、かつ濾過水
の全量をコレクタで集液するようにしたところ、SS濃度
1.5mg/の濾過水が得られた。Example 1 A perforated plate was attached to the lower part of a stainless steel filtration tower having a diameter of 650 mm and a height of 2,000 mm (linear portion).
μ, a long fiber bundle composed of an aggregate of acrylic non-twisted single fibers having a length of 1,500 mm is fixedly erected so as to have a packing density of 65 kg / m 3 (dry weight), and 300 mm from the perforated plate. A filtration tower as shown in FIG. 1 was constructed by horizontally arranging a collector formed by connecting porous hollow tubes in a cross shape in the upper long fiber bundle group, and a suspension (SS concentration) was placed in the filtration tower. ) Is 50mg / h on average and the papermaking wastewater is passed at a downward streamline speed of 50m / h, and all the filtered water is collected by the collector.
1.5 mg / filtered water was obtained.
当該濾過を3.5時間継続した時点で差圧が0.5kg/cm
2（初期差圧0.06kg/cm2）に上昇したので通水を終了
し、その後濾過塔の下部から上昇流速速度1,000Nm3/m2
の圧縮空気を１分間、次に同流速の圧縮空気と100m/Hの
逆洗水を３分間、更に100m/Hの逆洗水のみで１分間逆洗
を行った。以後、当該逆洗と前記濾過とを繰り返し行っ
て排水の連続処理を30日間行ったが、30日間経過後にお
いても逆洗後の差圧は初期差圧である0.06kg/m2に回復
し、長繊維束固定部での目詰まりは全く生じていなかっ
た。When the filtration was continued for 3.5 hours, the differential pressure was 0.5 kg / cm.
2 (initial differential pressure 0.06 kg / cm 2 ), water flow was stopped, and then the rising flow velocity from the bottom of the filtration tower was 1,000 Nm 3 / m 2
Was washed with compressed air at the same flow rate and backwashing water of 100 m / H for 3 minutes, and further backwashed with only 100 m / H of backwashing water for 1 minute. Thereafter, it was performed the backwash and the filtration and the 30-day continuous processing of repeatedly performed draining, even differential pressure after backwashing recovered to 0.06 kg / m 2 is the initial differential pressure after lapse of 30 days No clogging occurred at the long fiber bundle fixing portion.
実施例−２ 直径650mm、高さ2,000mm（直線部）のステンレス製の
濾過塔の下部に多孔板を付設し、当該多孔板のほぼ中央
部に太さ14μ、長さ1,500mmのアクリル製非撚単繊維の
集合体からなる第１の長繊維束の下端を固定するととも
にその外側に太さ43μ、長さ1,500mmのアクリル製非撚
単繊維の集合体からなる第２の長繊維束の下端を固定
し、かつそれぞれ上端を自由端とし、更に多孔板より30
0mm上方の、前記第１の長繊維束群内に多孔中空管から
なるコレクタを立設した、第２図に示したような濾過塔
を構成した。なお、この場合長繊維束の合計充填密度を
65kg/m3（乾燥重量、以下同じ）とし、第１の長繊維束
と第２の長繊維束との充填割合は、重量比でそれぞれ1/
3および2/3とした。Example 2 A perforated plate was attached to the lower part of a stainless steel filtration tower having a diameter of 650 mm and a height of 2,000 mm (linear portion), and a 14 μm thick, 1,500 mm long acrylic non-coated plate was provided almost at the center of the perforated plate. The lower end of the first long fiber bundle composed of an aggregate of twisted single fibers is fixed, and a second long fiber bundle composed of an aggregate of acrylic non-twisted single fibers having a thickness of 43 μm and a length of 1,500 mm is fixed to the outside thereof. The lower ends are fixed, and the upper ends are free ends.
A filtration tower as shown in FIG. 2 was constructed in which a collector consisting of a porous hollow tube was erected in the first long fiber bundle group 0 mm above. In this case, the total packing density of the long fiber bundle is
65 kg / m 3 (dry weight, the same applies hereinafter), the filling ratio of the first long fiber bundle and the second long fiber bundle is 1 /
3 and 2/3.
当該濾過塔の上方から、懸濁物（SS）濃度が平均50mg
/である製紙排水を下降流線速度50m/hで通水し、かつ
濾過水の全量をコレクタで集液するようにしたところ、
SS濃度0.5mg/以下の濾過水が安定して得られた。From above the filtration tower, the concentration of suspended solid (SS) is 50mg on average
When the papermaking wastewater / was passed at a downward streamline speed of 50 m / h, and all the filtered water was collected by the collector,
Filtered water with an SS concentration of 0.5 mg / or less was obtained stably.
当該濾過を2.5時間継続した時点で、差圧が0.5kg/cm2
（初期差圧0.06kg/cm2）に上昇したので通水を終了し、
その後濾過塔の下部から上昇流線速度1,000Nm3/m2の圧
縮空気を１分間、次に同流速の圧縮空気と100m/Hの逆洗
水を３分間、更に100m/Hの逆洗水のみで１分間逆洗した
ところ、当該濾過塔の差圧は初期差圧に戻り、長繊維束
に捕捉された懸濁物は完全に除くことができ、濾過前の
状態に回復することができた。At the time when the filtration was continued for 2.5 hours, the differential pressure was 0.5 kg / cm 2
(Initial pressure difference 0.06kg / cm 2 )
Then, from the lower part of the filtration tower, compressed air with a rising streamline velocity of 1,000 Nm 3 / m 2 for 1 minute, then compressed air with the same flow rate and 100 m / H backwash water for 3 minutes, and 100 m / H backwash water After only 1 minute of backwashing, the pressure difference in the filtration tower returns to the initial pressure difference, the suspended matter captured by the long fiber bundle can be completely removed, and the state before filtration can be recovered. Was.
また、このような濾過と逆洗とを繰り返して排水の連
続処理を行ったところ、30日間経過後においても逆洗後
の差圧は初期差圧である0.06kg/cm2に回復し、また長繊
維束固定部での目詰まりは全く生じていなかった。Furthermore, was subjected to a continuous treatment of waste water by repeating the such filtration and backwashing, even the differential pressure after the back washing is recovered to 0.06 kg / cm 2 is the initial differential pressure after lapse of 30 days, also No clogging occurred at the long fiber bundle fixing portion.
比較のために、実施例に用いたと同様の直径、高さの
濾過塔内に、太さ43μ、長さ1,500mmのアクリル製非撚
単繊維の集合体からなる、前記第２の長繊維束と同じ長
繊維束のみを65kg/m3の充填密度に立設してなる、第３
図に示したような従来の濾過塔（比較例−１）と、実施
例に用いたと同様の直径、高さの濾過塔内に、太さ14
μ、長さ長さ1,500mmのアクリル製非撚単繊維の集合体
からなる、前記第２の長繊維束と同じ長繊維束のみを、
65kg/m3の充填密度で立設してなる同じく従来の濾過塔
（比較例−２）のそれぞれに、実施例と同じ製紙排水を
下降流線速度50m/hで通水し、かつこの場合は、濾過水
の全量を従来と同じように多孔板を通過させた後に取り
出すようにしたところ、比較例−１においては差圧0.5k
g/m2に達するまでに3.5時間通水できたが、濾過水のSS
濃度は1.5mg/であり、また比較例−２においては濾過
水のSS濃度は0.5mg/以下と良好であったが、僅か１時
間以内で差圧が0.5kg/cm2となった。For comparison, the second long fiber bundle made of an aggregate of acrylic non-twisted monofilaments having a diameter of 43 μm and a length of 1,500 mm in a filtration tower having the same diameter and height as used in Examples. The third is that only the same long fiber bundle as above is erected at a packing density of 65 kg / m 3.
In a conventional filtration tower as shown in the figure (Comparative Example-1) and a filtration tower having the same diameter and height as used in the examples, a thickness of 14 mm was added.
μ, consisting of an aggregate of acrylic non-twisted single fibers having a length of 1,500 mm, only the same long fiber bundle as the second long fiber bundle,
To each well conventional filtration column consisting erected at a packing density of 65 kg / m 3 (Comparative Example - 2), and passing water to the same papermaking waste water as in Example descending flow line speed 50 m / h, and in this case Was taken out after passing the entire amount of filtered water through the perforated plate in the same manner as in the related art.
It was able 3.5 hours water passage to reach g / m 2, SS of filtered water
The concentration was 1.5 mg /, and in Comparative Example-2, the SS concentration of the filtered water was as good as 0.5 mg / or less, but the differential pressure became 0.5 kg / cm 2 within only one hour.
更に、上記濾過と、実施例と同じ条件での逆洗とを繰
り返し行って排水の連続処理を30日間行ったところ、比
較例−１の濾過塔においては逆洗後の差圧が、初期差圧
（0.06kg/cm2）より0.04kg/cm2上昇して0.1kg/cm2とな
り、また比較例−２の濾過塔においては初期差圧（0.06
kg/cm2）より0.14kg/cm2上昇して逆洗後差圧が0.2kg/cm
2に達するという現象が生じ、またいずれの濾過塔にお
いても長繊維束固定部に目詰まりが生じていることが目
視確認された。Further, the filtration and the backwashing under the same conditions as in the example were repeatedly performed to continuously process the wastewater for 30 days. In the filtration tower of Comparative Example 1, the pressure difference after the backwash was increased by the initial pressure difference. pressure (0.06 kg / cm 2) from 0.04 kg / cm 2 increased to 0.1 kg / cm 2, and the also the initial differential pressure in the filtration tower of Comparative example 2 (0.06
kg / cm 2) from 0.14 kg / cm 2 increased differential pressure after backwashing is 0.2 kg / cm
The phenomenon of reaching 2 occurred, and it was visually confirmed that clogging occurred in the long fiber bundle fixing portion in any of the filtration towers.
＜効果＞ 以上説明したごとく、本発明の濾過塔は長繊維束を固
定している支持体のやや上方に濾過液のコレクタを設け
たことによって濾過液を支持体の上方で集液することが
でき、従来のように長繊維束固定部に濾過液を通過させ
なくても済むので、当該長繊維束固定部に原液中の懸濁
物が詰まって当該部分を汚染するというような現象を確
実に防止することができ、長期間濾過を行っても圧力損
失をほとんど上昇させることなく、一定品質の濾過液を
安定して得ることができる。<Effects> As described above, the filtration tower of the present invention can collect the filtrate above the support by providing the filtrate collector slightly above the support fixing the long fiber bundle. Since it is not necessary to pass the filtrate through the long fiber bundle fixing part as in the prior art, it is possible to reliably prevent the long fiber bundle fixing part from being clogged with the suspended matter in the undiluted solution and contaminating the part. Thus, even if filtration is performed for a long period of time, it is possible to stably obtain a filtrate of a constant quality with almost no increase in pressure loss.
更に、上記構成に加えて、塔内中央部に比較的細い単
繊維の集合体からなる第１の長繊維束を配するととも
に、その外側に当該第１の長繊維束に用いた単繊維より
太い単繊維の集合体からなる第２の長繊維束を配し、か
つ前記第１の長繊維束群内にコレクタを設けた構成とし
た濾過塔によれば、前記した効果に加えて以下のような
別の効果も奏する。Further, in addition to the above configuration, a first long fiber bundle composed of an aggregate of relatively thin single fibers is arranged in the center of the tower, and outside the single fiber used for the first long fiber bundle, According to the filtration tower in which the second long fiber bundle composed of the aggregate of the thick single fibers is arranged, and the collector is provided in the first long fiber bundle group, the following effects are obtained in addition to the effects described above. Another effect is also achieved.
すなわち、当該濾過塔によれば、たとえば比較的細い
単繊維の集合体からなる第１の長繊維束のみを単独で充
填した濾過塔に較べて塔全体としての圧力損失を少なく
することができるのは勿論であるが、当該濾過塔におい
ては前述のごとく原液の一部、すなわち濾過塔内外周側
に配液された原液を、それぞれ径の異なる単繊維の集合
体からなる２種類の長繊維束に接触させることができ、
よってこのような流れに対していわゆる多層濾過の効果
が得られ、総合的には前記第１の長繊維束のみを単独で
充填した濾過塔の場合とほぼ同等の品質の濾過液を得る
ことができるとともに、それより濾過時間を長くするこ
とができるという効果を奏する。That is, according to the filtration tower, for example, the pressure loss of the entire tower can be reduced as compared with a filtration tower in which only the first long fiber bundle composed of an aggregate of relatively thin single fibers is filled alone. Needless to say, in the filtration tower, as described above, a part of the stock solution, that is, the stock solution distributed on the outer peripheral side of the inside of the filtration tower is converted into two types of long fiber bundles each composed of an aggregate of single fibers having different diameters. Can be brought into contact with
Therefore, the effect of so-called multi-layer filtration is obtained for such a flow, and it is possible to obtain a filtrate having almost the same quality as that of a filtration tower in which only the first long fiber bundle is packed alone. In addition to this, there is an effect that the filtration time can be prolonged.
第１図は本発明の実施態様の一例を示す濾過塔の模式断
面図、第２図は本発明の他の実施態様を示す濾過塔の模
式断面図であり、第３図は従来の濾過塔を示す模式断面
図である。また、第４図は長繊維束の固定部を示す拡大
断面図である。 １……濾過塔、２……支持体 ３……長繊維束、４……原液流入管 ５……逆洗水排出管、６……逆洗空気流入管 ７……逆洗水流入管、８……コレクタ ９……濾過液流出管、10〜14……弁FIG. 1 is a schematic sectional view of a filtration tower showing an example of an embodiment of the present invention, FIG. 2 is a schematic sectional view of a filtration tower showing another embodiment of the present invention, and FIG. FIG. FIG. 4 is an enlarged sectional view showing a fixing portion of the long fiber bundle. DESCRIPTION OF SYMBOLS 1 ... Filtration tower 2 ... Support 3 ... Long fiber bundle 4 ... Undiluted liquid inflow pipe 5 ... Backwash water discharge pipe, 6 ... Backwash air inflow pipe 7 ... Backwash water inflow pipe, 8 … Collector 9… Filtrate outflow pipe, 10-14… Valve
Claims (2)
を固定するとともにその上端を自由端として、塔内部全
体に複数の長繊維束を立設した濾過塔の上方から原液を
流入して長繊維束の上端から下端に向かって原液を通す
ことにより、長繊維束内の空隙部で懸濁物を捕捉する濾
過塔において、前記支持体のやや上方の長繊維束群内
に、濾過液を集液するためのコレクタを設けたことを特
徴とする長繊維束を用いた濾過塔。An undiluted solution is fixed from above a filtration tower having a plurality of long fiber bundles erected on the whole inside of the tower, with the lower end of the long fiber bundle fixed to a support provided at the lower part in the tower and the upper end being a free end. By flowing the undiluted solution from the upper end to the lower end of the long fiber bundle, in the filtration tower that captures the suspended matter in the void portion in the long fiber bundle, the filtration tower is placed in the long fiber bundle group slightly above the support. A filtration tower using a long fiber bundle, provided with a collector for collecting a filtrate.
部に比較的細い単繊維の集合体からなる第１の長繊維束
を配するとともに、その周囲に当該第１の長繊維束に用
いた単繊維より太い単繊維束の集合体からなる第２の長
繊維束を配し、かつ前記第１の長繊維束群内に、濾過液
を集液するためのコレクタを設けたことを特徴とする長
繊維束を用いた濾過塔。2. The filtration tower according to claim 1, wherein a first long fiber bundle composed of an aggregate of relatively thin single fibers is disposed in a central portion of the tower, and the first long fiber bundle is disposed around the first long fiber bundle. A second long fiber bundle composed of an aggregate of single fiber bundles thicker than the single fiber used in the first step, and a collector for collecting a filtrate is provided in the first long fiber bundle group. A filtration tower using a long fiber bundle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1173013A JP2760358B2 (en) | 1989-07-06 | 1989-07-06 | Filtration tower using long fiber bundle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1173013A JP2760358B2 (en) | 1989-07-06 | 1989-07-06 | Filtration tower using long fiber bundle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0338207A JPH0338207A (en) | 1991-02-19 |
| JP2760358B2 true JP2760358B2 (en) | 1998-05-28 |
Family
ID=15952583
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1173013A Expired - Lifetime JP2760358B2 (en) | 1989-07-06 | 1989-07-06 | Filtration tower using long fiber bundle |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2760358B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5345512B2 (en) * | 2009-12-02 | 2013-11-20 | オルガノ株式会社 | Long fiber filtration device backwash method and long fiber filtration device |
| CN104740906B (en) * | 2014-07-10 | 2016-05-11 | 靖江市维益知识产权服务有限公司 | A kind of high-efficiency fiber filter |
-
1989
- 1989-07-06 JP JP1173013A patent/JP2760358B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0338207A (en) | 1991-02-19 |
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