JPH0222003Y2 - - Google Patents
Info
- Publication number
- JPH0222003Y2 JPH0222003Y2 JP1985164979U JP16497985U JPH0222003Y2 JP H0222003 Y2 JPH0222003 Y2 JP H0222003Y2 JP 1985164979 U JP1985164979 U JP 1985164979U JP 16497985 U JP16497985 U JP 16497985U JP H0222003 Y2 JPH0222003 Y2 JP H0222003Y2
- Authority
- JP
- Japan
- Prior art keywords
- net
- yarn
- sedimentation tank
- present
- yarns
- 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
Links
- 238000004062 sedimentation Methods 0.000 claims description 25
- 238000003780 insertion Methods 0.000 claims description 8
- 230000037431 insertion Effects 0.000 claims description 8
- 239000004744 fabric Substances 0.000 claims description 7
- 239000012209 synthetic fiber Substances 0.000 claims description 4
- 229920002994 synthetic fiber Polymers 0.000 claims description 4
- 239000002245 particle Substances 0.000 description 13
- 230000000694 effects Effects 0.000 description 5
- 239000011800 void material Substances 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 239000000835 fiber Substances 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 229920000728 polyester Polymers 0.000 description 4
- 238000009940 knitting Methods 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 239000010802 sludge Substances 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000007665 sagging Methods 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 238000005273 aeration Methods 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000005188 flotation Methods 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 239000012784 inorganic fiber Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000002557 mineral fiber Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
Landscapes
- Knitting Of Fabric (AREA)
- Braiding, Manufacturing Of Bobbin-Net Or Lace, And Manufacturing Of Nets By Knotting (AREA)
Description
【考案の詳細な説明】
（産業上の利用分野）
本考案は、沈降槽内に張設する沈降槽用整流ネ
ツトに関するものである。[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a rectifying net for a settling tank that is stretched within the settling tank.
（従来の技術）
懸濁液中の粒子と液体とを分離する操作として
は、沈降、浮上、濾過、遠心分離などの方法があ
るが、この中で沈降分離は化学工業、上水道およ
び下水・排水処理などの分野で広範囲に採用され
ている固液分離法である。近年、分離効果の向上
のために沈降槽内に傾斜板を挿入した傾斜板沈降
槽が多用されている。傾斜板沈降槽は、在来の傾
斜板を設けていない沈降槽と比べて分離面積を大
きくとれるため、液量負荷を増大させることがで
き、また、整流効果があるため懸濁液の液量変動
並びに濁度変動に対応できるなど多くの利点を有
するものであるが、他方、傾斜板面上に沈積した
粒子の清掃が極めて難しいこと、傾斜板の下に蓄
積したスラツジの排出に困難性があつた。更に排
泥設備が傾斜板の下に設けてあるため、集泥機な
どの維持管理に難点があつた。また傾斜板の設置
に際しても槽内での組立てや配例に多大の手間と
時間を要し、施工並びに補修の点からも問題があ
つた。(Prior art) There are methods such as sedimentation, flotation, filtration, and centrifugation to separate particles in suspension from liquid. This is a solid-liquid separation method that is widely used in fields such as processing. In recent years, inclined plate settling tanks in which inclined plates are inserted into the settling tank have been frequently used to improve the separation effect. Slanted plate settling tanks have a larger separation area compared to conventional settling tanks without inclined plates, so they can increase the liquid volume load, and they also have a rectification effect, which reduces the suspension liquid volume. However, on the other hand, it is extremely difficult to clean the particles deposited on the inclined plate surface, and it is difficult to discharge the sludge accumulated under the inclined plate. It was hot. Furthermore, since the sludge removal equipment was installed under the inclined plate, there were difficulties in maintaining the sludge collector and other equipment. Further, when installing the inclined plate, a great deal of time and effort was required for assembly and arrangement within the tank, and there were also problems in terms of construction and repair.
そこで、本出願人は、上記の諸点に鑑み整流効
果が大で通水抵抗が小さく、しかも軽量で施工並
びに輸送も簡単な沈降槽用整流ネツトを提供する
ことを目的として鋭意検討の結果、沈降槽用整流
ネツトに、平行に配列された複数本の鎖編糸間が
挿入糸により所定間隔ごとに連結されて方形の透
孔部が形成された角目ラツセル編地が利用できる
ことを見出し、先に出願した（実開昭59−184903
号）。 Therefore, in view of the above-mentioned points, the present applicant has conducted extensive studies with the aim of providing a flow straightening net for a settling tank that has a large flow straightening effect, has low water flow resistance, is lightweight, and is easy to install and transport. It was discovered that a square lattice knitted fabric, in which a plurality of parallel chain stitch yarns are connected at predetermined intervals by inserted yarns to form rectangular through holes, can be used as a rectifying net for tanks. (Utility Model Application No. 59-184903)
issue).
（考案が解決しようとする課題）
上記した沈降槽用整流ネツトは、挿入糸として
無捲縮糸を用いているため、粒子の捕捉量（SS
の除去率）が十分ではなかつた。(Problem to be solved by the invention) The above-mentioned straightening net for a sedimentation tank uses non-crimped yarn as the insertion yarn, so the amount of trapped particles (SS
removal rate) was not sufficient.
本考案は、粒子の捕捉量（SSの除去率）の優
れた沈降槽用整流ネツトを提供することを目的と
するものである。 The purpose of the present invention is to provide a rectifier net for a settling tank that has an excellent particle capture amount (SS removal rate).
（課題を解決するための手段）
本考案者らは、上記課題を解決するために鋭意
検討の結果、挿入糸を無捲縮の糸条の層と特定の
捲縮加工糸の層との複数層で構成すれば、粒子の
捕捉量（SSの除去率）の優れた沈降槽用整流ネ
ツトの得られることを見出し、本考案に到達した
ものである。(Means for Solving the Problems) In order to solve the above problems, the inventors of the present invention, as a result of intensive studies, discovered that the inserted yarns are composed of multiple layers of non-crimped yarns and layers of specific crimped yarns. It was discovered that a rectifying net for a sedimentation tank with an excellent particle capture amount (SS removal rate) could be obtained by constructing the net with layers, and the present invention was developed.
すなわち、本考案は、平行に配列された複数本
の鎖編糸間が、挿入糸により所定間隔ごとに連結
されて方形の空〓部が形成された角目ラツセル編
地からなる沈降槽用整流ネツトにおいて、挿入糸
が無捲縮の糸条の層と捲縮伸長率が５〜30％を有
する合成繊維マルチフイラメント捲縮加工糸の層
との複数層で構成されていることを特徴とする沈
降槽用整流ネツトを要旨とするものである。 That is, the present invention is a rectifier for a sedimentation tank, which is made of a square ratchet fabric in which a plurality of chain stitch yarns arranged in parallel are connected at predetermined intervals by insertion yarns to form a rectangular void. A net is characterized in that the inserted yarn is composed of multiple layers of a layer of uncrimped yarn and a layer of synthetic fiber multifilament crimped yarn having a crimp elongation rate of 5 to 30%. This article focuses on rectifier nets for sedimentation tanks.
本考案による沈降槽用整流ネツトの構成を図面
にもとづいて詳細に説明する。 The configuration of the rectifier net for a sedimentation tank according to the present invention will be explained in detail based on the drawings.
第１図は、本考案による沈降槽用整流ネツトの
一例を示す概略平面図であり、整流ネツト１は、
適宜の太さに編成された複数本の鎖編糸２がほぼ
平行に配列され、かつ、それらの鎖編糸２間が挿
入糸３により所定間隔ごとに連結されて方形の空
隙（網目）部４が形成された、いわゆる角目ラツ
セル編地で構成される。 FIG. 1 is a schematic plan view showing an example of a straightening net for a sedimentation tank according to the present invention.
A plurality of chain stitch yarns 2 knitted to an appropriate thickness are arranged almost in parallel, and the chain stitch yarns 2 are connected at predetermined intervals by insertion yarns 3 to form a rectangular gap (mesh). It is composed of a so-called square rattussel knitted fabric in which 4 is formed.
本考案による沈降槽用整流ネツトの鎖編糸２の
素材としては天然繊維、合成繊維などの有機繊
維、ガラス繊維、鉱物繊維、金属繊維などの無機
繊維、あるいはそれらが混合されたフイラメント
状または紡績糸状のものを必要に応じて適宜選択
して用いるが、本考案による沈降槽用整流ネツト
の各挿入糸３は無捲縮糸と捲縮伸長率が５〜30％
を有する嵩高性合成繊維マルチフイラメント捲縮
加工糸を用いる。捲縮性を有した挿入糸は、この
場合捲縮伸長率が５％より小さいとフイラメント
の集束性が過大となり嵩高性が低下し、また風合
も立体感がなくなるので好ましくなく、また、捲
縮伸長率が30％を越えると、集束性が低下し、取
扱い性が悪く、特に、編網時にフイラメント切れ
が多発し不適であり、好ましくは捲縮伸長率が15
〜25％であ。無捲縮糸である挿入糸３は、鎖編糸
２と全く同様の素材を使用することが可能であ
る。本考案による沈降槽用整流ネツトの挿入糸
は、無捲縮糸の層とマルチフイラメント捲縮加工
糸の層の２層又は３層にて構成されている。した
がつて、外観は無捲縮糸が現れたり、マルチフイ
ラメント捲縮加工糸が現れたりする。 The chain stitch yarn 2 of the straightening net for settling tanks according to the present invention may be made of organic fibers such as natural fibers and synthetic fibers, inorganic fibers such as glass fibers, mineral fibers, and metal fibers, or filament-like or spun fibers made of a mixture thereof. Thread-like threads are selected and used as necessary, and each inserted thread 3 of the straightening net for a sedimentation tank according to the present invention has a crimped elongation rate of 5 to 30% compared to non-crimped thread.
A bulky synthetic fiber multifilament crimped yarn is used. In this case, if the crimp elongation rate of the inserted yarn is less than 5%, the filament will have excessive convergence, resulting in a decrease in bulkiness, and the texture will also lose its three-dimensional feel, which is not desirable. If the crimp elongation rate exceeds 30%, the convergence will decrease, the handling will be poor, and in particular, filament breakage will occur frequently during knitting, making it unsuitable. Preferably, the crimp elongation rate is 15%.
~25%. The insertion yarn 3, which is a non-crimped yarn, can be made of the same material as the chain knitting yarn 2. The inserted yarn of the straightening net for a sedimentation tank according to the present invention is composed of two or three layers: a layer of non-crimped yarn and a layer of multifilament crimped yarn. Therefore, the appearance may be that of non-crimped yarn or multifilament crimped yarn.
該捲縮加工糸は、適度の数のループやタルミを
有するため、これらの毛羽効果によつて厚みのあ
る立体性のあるものとなる。すなわち、本考案に
よる沈降槽用整流ネツトの挿入糸は無捲縮糸とマ
ルチフイラメント捲縮加工糸を用いており、該整
流ネツトは表面より突出したループやタルミによ
り嵩高性が発現し、さらに、マルチフイラメント
同士が交叉する部分が多く、したがつて、粒子が
立体的に付着し捕捉量が増大する。さらに、無捲
縮糸と複数層の構成を成しているので、該整流ネ
ツトが沈降槽内に張設される場合、無捲縮糸によ
り良好な寸法安定性が得られるめに、該整流ネツ
トが伸びず密着しない。 Since the crimped yarn has an appropriate number of loops and sagging, it becomes thick and three-dimensional due to the fluff effect. That is, the insertion yarn of the straightening net for a sedimentation tank according to the present invention uses non-crimped yarn and multifilament crimped yarn, and the straightening net exhibits bulkiness due to loops and sagging that protrude from the surface, and furthermore, There are many parts where the multifilaments intersect with each other, so particles adhere three-dimensionally and the amount of trapped particles increases. Furthermore, since it has a multi-layer structure with non-crimped yarn, when the straightening net is stretched in a settling tank, the non-crimped yarn provides good dimensional stability. The net does not stretch and does not adhere tightly.
また、各鎖編糸２間の間隔、すなわち、挿入糸
３の長さは10〜300mmで、また、各挿入糸３間の
間隔が５〜70mmで、そして、それらが形成される
空隙部４の個々の面積が0.5〜200cm2であることが
空隙部４の閉塞を防ぐため好ましく、編地面積に
対する空隙すなわち投影図において光の通過する
部分の総面積の割合（空隙率）が５〜70％のもの
が好ましい。 In addition, the distance between each chain knitting yarn 2, that is, the length of the inserted yarn 3, is 10 to 300 mm, the distance between each inserted yarn 3 is 5 to 70 mm, and the gap 4 in which they are formed is 10 to 300 mm. It is preferable that the individual area of 0.5 to 200 cm 2 is 0.5 to 200 cm 2 to prevent clogging of the void 4, and the ratio (porosity) of the total area of the void, that is, the portion through which light passes in the projection view, to the area of the knitted fabric is 5 to 70. % is preferred.
第２図は、本考案に係る角目ラツセル編地から
なる沈降槽用整流ネツト１を水平流式長方形沈降
槽内に取付けた場合の一例を示す斜視図で、上部
支持棒５を槽周壁に架橋し、整流ネツト１を流れ
方向と垂直になるように適宜の間隔で懸垂張設さ
れている。また第３図は本考案に係る沈降槽用整
流ネツト１を垂直流型円形沈降槽内に取りつけた
場合の１例を示す概略平面図ａ及び概略断面図ｂ
で、同心円状に構成された支持棒５に整流ネツト
１を張設したものである。 FIG. 2 is a perspective view showing an example of a case where the rectifying net 1 for a sedimentation tank made of a square lattice knitted fabric according to the present invention is installed in a rectangular horizontal flow type sedimentation tank, and the upper support rod 5 is attached to the peripheral wall of the tank. A cross-linked flow straightening net 1 is suspended and stretched at appropriate intervals so as to be perpendicular to the flow direction. FIG. 3 is a schematic plan view a and a schematic cross-sectional view b showing an example of a case where the settling tank rectifier net 1 according to the present invention is installed in a vertical flow type circular settling tank.
A rectifying net 1 is stretched around a support rod 5 formed in a concentric circle.
本考案でいう捲縮伸長率は糸条に１mg／ｄの荷
重をかけたときの長さをL1、100mg／ｄの荷重を
かけたときの長さをL2として、次式より求める。 The crimp elongation rate in the present invention is determined by the following formula, where L 1 is the length when a load of 1 mg/d is applied to the yarn, and L 2 is the length when a load of 100 mg/d is applied to the yarn.
捲縮伸長率（％）＝L2−L1／L1×100（％）
（実施例）
次に、本考案による沈降槽用整流ネツトを使用
した場合の具体例について説明する。 Crimp elongation rate (%)=L 2 −L 1 /L 1 ×100 (%) (Example) Next, a specific example in which the straightening net for a sedimentation tank according to the present invention is used will be described.
(1)下記の仕様を持つ整流ネツトを、第２図に示
すごとく沈降槽内に取付け、５ｍ間隔で４枚懸垂
張設した。 (1) Four rectifier nets with the following specifications were installed in the sedimentation tank as shown in Figure 2, and four nets were suspended at 5 m intervals.
〔沈降槽用整流ネツト仕様〕
鎖編糸：ポリエステルマルチフイラメント
1500d／140f ２本
挿入糸：ポリエステル捲縮加工糸（捲縮伸長
率20）
1500d／140f １本
ポリエステルマルチフイラメント無捲縮糸
1500d／140f １本
形態：角目ラツセル編地（第１図の通り）
空隙率：30％
空隙部面積：６cm2／個
沈降槽型式：水平流式長方形
沈降槽の大きさ：巾−６ｍ
長さ−25ｍ
深さ−４ｍ
約１年にわたり沈降槽内での粒子の沈降状態及
び流動状況を調査したところ、沈降槽内に流入し
た原水は整流ネツトにより整流され、沈降槽全面
に広がりながら流動し、原水流入の際に起こる槽
内の撹乱や短絡流、また冬期における外温や風に
よる水面の乱れも緩和され、急激な水量変動並び
に濁度変化に対しても適応できる粒子の溢流現象
は生じなかつた。 [Specification of rectifier net for sedimentation tank] Chain stitch yarn: Polyester multifilament 1500d/140f 2 pieces Insert yarn: Polyester crimped yarn (crimp elongation rate 20) 1500d/140f 1 piece Polyester multifilament non-crimped yarn 1500d/140f 1 piece Form: square mesh latussel knitted fabric (as shown in Figure 1) Porosity: 30% Void area: 6cm 2 / piece Sedimentation tank type: Horizontal flow rectangular Sedimentation tank size: Width - 6m Length - 25m Depth -4m After investigating the sedimentation and flow conditions of particles in the sedimentation tank over a period of approximately one year, it was found that the raw water that entered the sedimentation tank was rectified by the rectifier net, spread over the entire surface of the sedimentation tank, and flowed. Disturbances and short-circuit currents within the tank that occur during the winter, as well as turbulence on the water surface caused by outside temperature and wind during the winter, were alleviated, and particle overflow phenomena that could adapt to sudden changes in water volume and turbidity did not occur. .
(2)第３図に示すように、垂直流型円形沈降槽
（直径５ｍ、有効深さ４ｍ）内に上記整流ネツト
を１ｍ間隔で同心円状に張設した場合において
も、流入した原水は槽内の清澄層を混合すること
なく、層周壁の溢流桶に向かつて層内に起こる短
絡流や密度流現象が抑制され、粒子の沈降効率は
増大した。 (2) As shown in Figure 3, even when the above rectifier nets are stretched concentrically at 1 m intervals in a vertical flow type circular sedimentation tank (diameter 5 m, effective depth 4 m), raw water flowing into the tank Without mixing the clarified layer within the layer, short-circuit flow and density flow phenomena that occur within the layer toward the overflow trough on the peripheral wall of the layer were suppressed, and the sedimentation efficiency of particles was increased.
また、粒子の除去率は、約90％であり、これ
は、従来の沈降槽用整流ネツト（挿入糸としてポ
リエステルマルチフイラメント無捲縮糸２本を用
いた以外は、上記実施例と同じ沈降槽用整流ネツ
ト）約60％と比べて粒子の捕捉量（SSの除去率）
がかなり優れていた。 In addition, the particle removal rate was approximately 90%, which was higher than that of the conventional settling tank straightening net (the same settling tank as in the above example except that two polyester multifilament non-crimped threads were used as the insertion threads). The amount of particles captured (removal rate of SS) is approximately 60% compared to
was quite good.
（考案の効果）
本考案によれば、粒子の捕捉量（SSの除去率）
の優れた整流ネツトを提供することができる。な
お、本考案の整流ネツトは、上記のような構成を
有するので、曝気槽内に極めて容易に規則的間隔
でセツトすることができ、また、軽いので、取扱
い易く、運搬も容易であるなど、多くの利点を有
するものである。(Effect of the invention) According to the invention, the amount of particles captured (SS removal rate)
can provide an excellent rectification net. Furthermore, since the rectifying net of the present invention has the above-mentioned configuration, it can be set extremely easily in the aeration tank at regular intervals, and it is also lightweight, so it is easy to handle and transport. It has many advantages.
第１図は、本考案に関わる整流ネツトの一例を
示す概略平面図である。第２図は、本考案に関わ
る整流ネツトの実施の態様を示す斜視図である。
第３図は、本考案に関わる整流ネツトの実施の態
様を示すものでａが概略平面図であり、ｂが概略
断面図である。
１：整流ネツト、２：鎖編糸、３：挿入糸、
４：空隙部、５：支持棒、６：バンド。
FIG. 1 is a schematic plan view showing an example of a rectifying net related to the present invention. FIG. 2 is a perspective view showing an embodiment of the rectifier net according to the present invention.
FIG. 3 shows an embodiment of the rectifying net according to the present invention, in which a is a schematic plan view and b is a schematic cross-sectional view. 1: Rectifying net, 2: Chain stitch yarn, 3: Insert yarn,
4: void, 5: support rod, 6: band.
Claims (1)
により所定間隔ごとに連結されて方形の空隙部が
形成された角目ラツセル編地からなる沈降槽用整
流ネツトにおいて、挿入糸が無捲縮の糸条の層と
捲縮伸張率が５〜30％を有する合成繊維マルチフ
イラメント捲縮加工糸の層との複数層で構成され
ていることを特徴とする沈降槽用整流ネツト。 In a rectifier net for a sedimentation tank, which is made of square ratchet knitted fabric in which a plurality of chain stitch yarns arranged in parallel are connected at predetermined intervals by insertion yarns to form square voids, there are no insertion yarns. 1. A straightening net for a sedimentation tank, comprising a plurality of layers including a layer of crimped yarn and a layer of synthetic fiber multifilament crimped yarn having a crimp elongation rate of 5 to 30%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985164979U JPH0222003Y2 (en) | 1985-10-25 | 1985-10-25 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985164979U JPH0222003Y2 (en) | 1985-10-25 | 1985-10-25 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6272105U JPS6272105U (en) | 1987-05-08 |
| JPH0222003Y2 true JPH0222003Y2 (en) | 1990-06-13 |
Family
ID=31094592
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1985164979U Expired JPH0222003Y2 (en) | 1985-10-25 | 1985-10-25 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0222003Y2 (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59184903U (en) * | 1983-05-28 | 1984-12-08 | ユニチカ株式会社 | Rectifier net for settling tank |
-
1985
- 1985-10-25 JP JP1985164979U patent/JPH0222003Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6272105U (en) | 1987-05-08 |
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