JP2001314712A - Filter cloth for filter press - Google Patents
Filter cloth for filter pressInfo
- Publication number
- JP2001314712A JP2001314712A JP2000136227A JP2000136227A JP2001314712A JP 2001314712 A JP2001314712 A JP 2001314712A JP 2000136227 A JP2000136227 A JP 2000136227A JP 2000136227 A JP2000136227 A JP 2000136227A JP 2001314712 A JP2001314712 A JP 2001314712A
- Authority
- JP
- Japan
- Prior art keywords
- filter
- filter cloth
- synthetic resin
- warp
- cloth
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Filtering Materials (AREA)
- Filtration Of Liquid (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、固液分離を行う単
式フィルタープレスに使用される合成樹脂モノフィラメ
ント製の濾過布に関し、詳細には、微細粒子に対する粒
子捕捉性と耐目詰まり性が良好な合成樹脂モノフィラメ
ント製の単式フィルタープレス用濾過布に関するもので
ある。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filter cloth made of a synthetic resin monofilament used for a single type filter press for performing solid-liquid separation, and more particularly, to a filter cloth having a good ability to trap fine particles and a good clogging resistance. The present invention relates to a filter cloth for a single filter press made of a synthetic resin monofilament.
【０００２】更には、浄水設備における濁質濃縮スラッ
ジに薬剤を注入しないで該濃縮スラッジの固液分離を行
うフィルタープレスに好適に使用される濾過布に関す
る。[0002] Further, the present invention relates to a filter cloth suitably used for a filter press for performing solid-liquid separation of a concentrated sludge without injecting a chemical into a turbid concentrated sludge in a water purification facility.
【０００３】[0003]
【従来の技術】加圧脱水機、所謂フィルタープレスは、
飲料用上水や工業用水等の浄水設備から排出される濃縮
スラッジをはじめ、各種工業廃水や下水の最終処理設備
から排出される汚泥等の高次の加圧・圧搾脱水に広く用
いられている。2. Description of the Related Art A pressure dehydrator, a so-called filter press,
It is widely used for high-pressure, compressed and dewatering of concentrated sludge discharged from water purification equipment for drinking water and industrial water, as well as sludge discharged from various industrial wastewater and sewage final treatment equipment. .
【０００４】そして、前記フィルタープレスに使用され
る濾過布としては、合成繊維マルチフィラメント糸を主
体に構成された濾過布が従来から用いられてきた。[0004] As a filter cloth used in the filter press, a filter cloth mainly composed of a synthetic fiber multifilament yarn has been conventionally used.
【０００５】前記浄水濃縮スラッジや各種汚泥等の高次
の加圧・圧搾脱水操作を行う場合、例えば、前記浄水設
備から排出される濃縮スラッジにおいては、フィルター
プレスで加圧脱水された脱水ケーキの最終処分に対する
法規制からの必要性、並びに、省エネルギーや機械装置
の維持管理及び操作の簡便性等の要求から、消石灰等の
薬剤をスラッジに添加せず、圧搾機構を省いて機械構造
を簡単にしたフィルタープレスを用いて無薬注のスラッ
ジ圧入操作だけを一日当たり１サイクル行う、所謂「無
薬注長時間脱水」の方式がある。[0005] When performing a higher-order pressurized / pressed dewatering operation of the purified water concentrated sludge or various sludges, for example, in the concentrated sludge discharged from the water purification equipment, the dewatered cake pressurized and dehydrated by a filter press is used. Due to the necessity of laws and regulations for final disposal, as well as demands for energy saving and maintenance and easy operation of machinery and equipment, chemicals such as slaked lime are not added to sludge, and the mechanical structure is simplified by eliminating the pressing mechanism. There is a so-called “chemical-free long-time dehydration” method in which only a chemical-free sludge press-fitting operation is performed for one cycle per day using a filtered filter press.
【０００６】この「無薬注長時間脱水」の方式に用いら
れるフィルタープレスでは、２４時間にも及ぶ長い操作
サイクルにおいて、フィルタープレスの処理能力を増大
させる必要から、１台当たりの濾過面積を増大すべく、
濾室数が２００室以上に及ぶ場合がある。この、濾室数
の増大に対応して濾板は極端に薄くなり、スラッジの段
階的高圧圧入に対する濾板の強化対策として濾板表面に
は多くのディスタンスピースが配設される。[0006] In the filter press used in the “chemical-free long-time dehydration” system, the filtration area per unit is increased due to the need to increase the processing capacity of the filter press in a long operation cycle of 24 hours. In order to
The number of filtration chambers may reach 200 or more. In response to the increase in the number of filter chambers, the filter plate becomes extremely thin, and a large number of distance pieces are arranged on the filter plate surface as a measure for strengthening the filter plate against stepwise high-pressure injection of sludge.
【０００７】また、この「無薬注長時間脱水」の方式に
用いられるフィルタープレスでは、機械構造を簡単にし
て、濾過布の下方への走行機構や脱水ケーキの濾過布表
面からの剥離・離脱の為の機械装置を設備しない場合が
多くあるため、この脱水ケーキの濾過布表面からの剥離
・離脱は、濾過布の表面特性と前記脱水ケーキの表面状
態を巧みに利用したケーキの自重による自然落下に依存
するところが大きい。Further, in the filter press used for the "drug-free long-time dehydration" system, the mechanical structure is simplified, and a mechanism for moving the filter cloth downward and peeling / separation of the dewatered cake from the surface of the filter cloth are achieved. In many cases, there is no mechanical device for the removal of the dewatered cake from the surface of the filter cloth. It depends heavily on falling.
【０００８】前記薬剤を添加しない所謂「無薬注スラッ
ジ」は、粘凋な微細粒子を含み、その脱水ケーキの濾過
布表面からの自重による剥離も難しいものがあり、それ
に有効な濾過布として、ナイロン製マルチフィラメント
を主体に構成された濾過布が多用されてきた。The so-called “drug-free sludge” to which the above-mentioned chemicals are not added contains viscous fine particles, and it is difficult for the dewatered cake to separate from the filter cloth surface by its own weight. Filter cloths mainly composed of nylon multifilaments have been frequently used.
【０００９】このマルチフィラメントを主体とする比較
的緻密な濾過布では、繊維間隙に微細粒子や濾液から析
出した結晶が沈着して徐々に目詰まりが進行し、この濾
過布の目詰まりによる「処理能力の低下」及び加圧脱水
後の濾過ケーキ排出操作時の濾過ケーキの濾過布表面か
らの剥離不良による「脱水ケーキ排出時間の増大」が問
題になった。In a relatively dense filter cloth mainly composed of the multifilaments, fine particles and crystals precipitated from the filtrate are deposited in the interstices of fibers, and the clogging gradually progresses. The problem was "decrease in capacity" and "increase in dewatering cake discharge time" due to poor peeling of the filter cake from the filter cloth surface during the operation of discharging the filter cake after dehydration under pressure.
【００１０】この目詰まりの進行による「処理能力の低
下」及び濾過ケーキの濾過布表面からの剥離不良等によ
る「脱水ケーキ排出時間の増大」の問題の対策として、
合成樹脂モノフィラメント、特に６ナイロン製モノフィ
ラメントを主体とする濾過布が一部適用される様になっ
た。As countermeasures against the problems of "decrease in processing capacity" due to the progress of clogging and "increased drainage cake discharge time" due to poor peeling of the filter cake from the filter cloth surface, etc.
Some filter cloths mainly composed of synthetic resin monofilaments, in particular, 6 nylon monofilaments have been applied.
【００１１】この合成樹脂モノフィラメントを主体とす
る濾過布としては、該濾過布の使用時のフィルタープレ
スの濾板面の上下方向の糸(以下「経糸」と表現する)、
及び、該濾板面の横断方向の糸(以下「緯糸」と表現す
る)に円形断面の６ナイロン製モノフィラメントを用い
て、前記経糸が、連続して配置された４本の前記緯糸に
対して該濾過布の濾過ケーキ接触面側(以下「表面」と
表現する。)を覆い、続く１本の前記緯糸に対して該濾
過布の濾過ケーキ非接触面側(以下「裏面」と表現す
る。)を覆うべく５枚朱子の織組織で織成され、製織
後、前記濾過ケーキ接触面側に表面平滑化加工を施した
濾過布が多く用いられてきた。As the filter cloth mainly composed of the synthetic resin monofilament, there are vertical threads (hereinafter referred to as "warp") on a filter plate surface of a filter press when the filter cloth is used,
And, using a 6-nylon monofilament having a circular cross section as a yarn in the transverse direction of the filter plate surface (hereinafter referred to as “weft”), the warp is used for the four wefts arranged continuously. The filter cloth covers the filter cake contact surface side (hereinafter, referred to as “front surface”), and the subsequent one weft is referred to as the filter cake non-contact surface side of the filter cloth (hereinafter, referred to as “back surface”). ) Is often woven with a satin weave structure to cover the filter cake, and after weaving, the filter cake contact surface side has been subjected to a surface smoothing process.
【００１２】前記５枚朱子織組織では、経糸と緯糸との
交絡が緯糸５本につき１本と少なく、経糸と緯糸との密
着が不充分となり易いため、微細粒子の粒子捕捉性を確
保するためには、温度や圧力を高めた「強条件カレンダ
ー加工」を必要とし、そのためモノフィラメント糸に破
断や溶融等の欠陥が発生し、フィルタークロスの機械的
強度の低下や短命化、メンテナンス工数の増大等の問題
が生じる可能性があった。In the five-ply satin weave, the entanglement between the warp and the weft is as small as one per five wefts, and the adhesion between the warp and the weft tends to be insufficient. Requires high-strength calendering at elevated temperatures and pressures, causing defects such as breakage and melting in the monofilament yarn, lowering the mechanical strength and shortening the life of the filter cloth, increasing maintenance man-hours, etc. The problem could arise.
【００１３】「強条件カレンダー加工」を避けて微細粒
子の粒子捕捉性を上げるには、経糸及び緯糸の繊度を細
くして濾過布織組織を緻密化する方法が考えられるが、
その場合には、経糸及び緯糸が細いために濾過布に要求
される強度や剛性を確保するのが困難で、皺や伸びの発
生を招いたり、耐久性の不充分な濾過布となる等の問題
があり、用いられる線径には制約が有った。In order to avoid the "strong-conditional calendering" and increase the particle-capturing property of the fine particles, a method of making the fineness of the warp yarn and the weft yarn small to make the structure of the filter cloth dense can be considered.
In such a case, it is difficult to secure the strength and rigidity required for the filter cloth because the warp and the weft are thin, causing wrinkles and elongation, or resulting in a filter cloth with insufficient durability. There was a problem, and the wire diameter used was restricted.
【００１４】加えて、前記合成樹脂モノフィラメント、
特に６ナイロン製モノフィラメントを主体とする５枚朱
子織組織の濾過布では、素材自体のセット性が乏しくカ
レンダー効果が薄れやすく、また、経糸が長浮きする濾
過ケーキ接触面側の経糸方向への「濾過布の巻上がり
（カール）」や、緯糸が長浮きする濾過ケーキ非接触面
側への緯糸方向の「濾過布の巻上がり（カール）」が発
生し、濾過布端部が濾板間に折れ込まれてフィルタープ
レスの操作上問題を生じたり、濾過布の耐用期間を縮め
たりすると共に、該濾過布の製作時の作業性やフィルタ
ープレスへの装着作業性に困難が生じることも有った。In addition, the synthetic resin monofilament,
In particular, in the case of a five-sheet satin-woven filter cloth mainly composed of 6-nylon monofilament, the setting properties of the material itself are poor and the calender effect is liable to be weakened, and the warp direction in the warp direction on the filter cake contact surface side where the warp floats long. The curling of the filter cloth and the curling of the filter cloth in the weft direction on the non-contact side of the filter cake where the weft floats long, occur, and the end of the filter cloth is between the filter plates. The filter cloth may be folded and cause a problem in the operation of the filter press, shorten the useful life of the filter cloth, and also cause difficulty in workability in manufacturing the filter cloth and mounting work to the filter press. Was.
【００１５】一方、上記の様なモノフィラメントを主体
とする濾過布の問題を解決するために、経糸及び／又は
緯糸に中空モノフィラメント糸を用いて製織した濾過布
が提案されている。この濾過布は、中空モノフィラメン
ト糸の優れた柔軟性により、経糸と緯糸との交絡点当接
面積が大きくなり、粒子捕捉性が高まると共に、微細粒
子の粒子捕捉性を確保するための強条件カレンダー加工
を必ずしも必要としないが、中空モノフィラメント糸は
中実モノフィラメント糸に比べて強力が低く線径を太く
しないと濾過布に求められる剛性を確保し難く、また中
空部の空隙を完全に無くすための加工工数が多くなる等
の問題が残っていた。On the other hand, in order to solve the above-mentioned problem of the filter cloth mainly composed of monofilaments, a filter cloth woven by using hollow monofilament yarns for the warp and / or weft has been proposed. Due to the excellent flexibility of the hollow monofilament yarn, this filter cloth has a large contact area between the warp and the weft, which increases the particle trapping property and a strong condition calendar for securing the particle trapping property of fine particles. Although processing is not necessarily required, hollow monofilament yarns have lower strength than solid monofilament yarns, and it is difficult to secure the required rigidity of the filter cloth unless the wire diameter is increased, and to completely eliminate voids in the hollow part. Problems such as an increase in the number of processing steps remain.
【００１６】[0016]
【発明が解決しようとする課題】本発明は、中実の合成
樹脂モノフィラメントを経糸及び／又は緯糸に用いて製
織した濾過布において、フィルタープレス使用下の濾過
布に求められる剛性や耐久性を確保すると同時に、微細
粒子に対する良好な粒子捕捉性と耐目詰まり性を達成し
た、並びに、フィルタープレスの操作、装着上問題とな
る「濾過布の巻上がり」を無くした濾過布を提供する。
更には、浄水設備における、粘凋な微細粒子を多く含む
所謂「無薬注スラッジ」に適する微細粒子捕捉性能と、
前記粘凋な微細粒子を多く含む脱水ケーキの良好な剥離
・離脱性を有する濾過布を提供する。SUMMARY OF THE INVENTION An object of the present invention is to provide a filter cloth woven using a solid synthetic resin monofilament as a warp and / or a weft to secure the rigidity and durability required for a filter cloth using a filter press. At the same time, the present invention provides a filter cloth which achieves good particle trapping properties and clogging resistance for fine particles and eliminates "winding of the filter cloth" which is a problem in operation and mounting of a filter press.
Furthermore, in water purification equipment, fine particle capturing performance suitable for so-called “chemical-free sludge” containing many viscous fine particles,
Provided is a filter cloth having good peeling and releasing properties of a dehydrated cake containing a large amount of the viscous fine particles.
【００１７】[0017]
【課題を解決するための手段】本発明は固液分離を行う
単式フィルタープレスに使用される濾過布であって、濾
過布（20）が合成樹脂モノフィラメントから成り、該濾
過布の使用時のフィルタープレスの濾板面の上下方向の
合成樹脂モノフィラメント（23）の直径が０．２ｍｍ〜
０．３ｍｍの範囲で、前記濾板面の横断方向の合成樹脂
モノフィラメント（24）の直径が０．２ｍｍ〜０．４ｍ
ｍの範囲であって、且つ、前記濾板面の上下方向の合成
樹脂モノフィラメント（23）の直径と該合成樹脂モノフ
ィラメントの２５．４ｍｍ間の糸本数との積が２８〜３
０の範囲で、前記濾板面の横断方向の合成樹脂モノフィ
ラメント（24）の直径と該合成樹脂モノフィラメントの
２５．４ｍｍ間の糸本数との積が６〜２０の範囲であっ
て、且つ、前記濾板面の横断方向の糸（24）が単層の２
／２斜文よこうね織組織で製織後、濾過ケーキ接触面側
（21）に平滑化加工が施され、且つ、濾過ケーキ接触面
から濾過ケーキ非接触面（22）に向けてのフラジール形
法による１２５Ｐａ加圧空気の通気度が６０ｃｍ3／ｃ
ｍ2・min.〜６００ｃｍ3／ｃｍ2・min.の範囲で、バブ
ルポイント法による最大孔径測定値が１５０μｍ以下で
あるフィルタープレス用濾過布である。SUMMARY OF THE INVENTION The present invention relates to a filter cloth used for a single type filter press for performing solid-liquid separation, wherein the filter cloth (20) is made of synthetic resin monofilament, and the filter cloth at the time of using the filter cloth is used. The diameter of the synthetic resin monofilament (23) in the vertical direction of the filter plate surface of the press is 0.2 mm or more.
In the range of 0.3 mm, the diameter of the synthetic resin monofilament (24) in the transverse direction of the filter plate surface is 0.2 mm to 0.4 m.
m, and the product of the diameter of the synthetic resin monofilament (23) in the vertical direction of the filter plate surface and the number of yarns of the synthetic resin monofilament between 25.4 mm is 28 to 3
0, the product of the diameter of the synthetic resin monofilament (24) in the transverse direction of the filter plate surface and the number of yarns of the synthetic resin monofilament between 25.4 mm is in the range of 6 to 20, and The thread (24) in the cross direction of the filter plate is a single layer 2
/ 2 After weaving with a slanted weave woven structure, the filter cake contact surface side (21) is smoothed, and the Frazier shape from the filter cake contact surface to the filter cake non-contact surface (22) The air permeability of 125Pa pressurized air by the method is 60 cm 3 / c
A filter cloth for a filter press having a maximum pore size measured by a bubble point method of 150 μm or less in a range of m 2 · min. to 600 cm 3 / cm 2 · min.
【００１８】前記２／２斜文よこうね織組織が、２／２
正斜文よこうね織、又は、２／２破れ斜文よこうね織、
又は、２／２杉綾よこうね織のいずれかであるフィルタ
ープレス用濾過布である。The 2/2 oblique weave texture is 2/2
Orthodontic weaving, or 2/2 torn weaving,
Or, it is a filter cloth for filter press which is either 2/2 Sugiaya Yone weave.
【００１９】前記濾過布が、浄水設備の濁質濃縮スラッ
ジに薬剤を注入しないで該濃縮スラッジの固液分離を行
う単式フィルタープレスに使用される濾過布であって、
前記合成樹脂モノフィラメントが、６ナイロンおよび６
６ナイロンの少なくとも一方から成るナイロン製モノフ
ィラメントであるフィルタープレス用濾過布である。The filter cloth used in a single-type filter press for performing solid-liquid separation of a concentrated sludge without injecting a chemical into a suspended sludge of a water purification facility,
The synthetic resin monofilament comprises 6 nylon and 6
6 is a filter cloth for a filter press, which is a nylon monofilament composed of at least one of nylon 6.
【００２０】[0020]
【発明の実施の形態】本発明の濾過布は、経糸及び／又
は緯糸に中実の合成樹脂モノフィラメントを用いて製織
する。合成樹脂モノフィラメントの素材には、ナイロ
ン、ポリプロピレン、及びポリエステルを好適とし、こ
れら素材のうち一種類又は複数種類で経糸及び／又は緯
糸を構成する、或いは経糸と緯糸とで素材を異ならせて
も良い。尚、粘凋な微細粒子を多く含む、例えば浄水設
備における所謂「無薬注スラッジ」に適用する場合に
は、６ナイロンおよび６６ナイロンのどちらか一方より
成る、或いはそれらを混用して成るナイロン製モノフィ
ラメントを経糸及び／又は緯糸に用いるのを好適とす
る。ナイロンモノフィラメントの持つ吸水性と表面平滑
性が、前記粘凋な微細粒子を多く含む脱水ケーキの濾過
布表面からの剥離・離脱を容易にする。BEST MODE FOR CARRYING OUT THE INVENTION The filter cloth of the present invention is woven using a solid synthetic resin monofilament for warp and / or weft. The material of the synthetic resin monofilament is preferably nylon, polypropylene, or polyester, and one or more of these materials may constitute the warp and / or the weft, or the material may be different between the warp and the weft. . In addition, when it is applied to so-called "non-chemical injection sludge" containing a large amount of viscous fine particles, for example, in a water purification facility, it is made of either nylon 6 or nylon 66 or a mixture of nylon 6 and nylon 66. Preferably, monofilaments are used for the warp and / or weft. The water absorption and surface smoothness possessed by the nylon monofilament facilitate the peeling and detachment of the dewatered cake containing a large amount of the viscous fine particles from the surface of the filter cloth.
【００２１】該濾過布の使用時のフィルタープレスの濾
板面の上下方向(「経糸」)には直径が０．２ｍｍ〜０．
３ｍｍの範囲の合成樹脂モノフィラメントを用い、前記
濾板面の横断方向(「緯糸」)には直径が０．２ｍｍ〜
０．４ｍｍの範囲の合成樹脂モノフィラメントを用い、
且つ、前記経糸の直径と該経糸の２５．４ｍｍ間の糸本
数との積を２８〜３０の範囲とし、前記緯糸の直径と該
緯糸の２５．４ｍｍ間の糸本数との積を６〜２０の範囲
として、緯単層の２／２斜文よこうね織組織で製織した
後、濾過ケーキ接触面側に平滑化加工を施して、濾過ケ
ーキ接触面から濾過ケーキ非接触面に向けてのフラジー
ル形法による１２５Ｐａ加圧空気の通気度が６０ｃｍ3
／ｃｍ2・min.〜６００ｃｍ3／ｃｍ2・min.の範囲、バ
ブルポイント法による最大孔径測定値が１５０μｍ以下
である濾過布とする。When the filter cloth is used, the diameter in the vertical direction ("warp") of the filter plate surface of the filter press is 0.2 mm to 0.2 mm.
Using a synthetic resin monofilament in the range of 3 mm, the diameter in the transverse direction (“weft”) of the filter plate surface is 0.2 mm to
Using a synthetic resin monofilament in the range of 0.4 mm,
The product of the diameter of the warp and the number of yarns between 25.4 mm of the warp is in a range of 28 to 30, and the product of the diameter of the weft and the number of yarns of 25.4 mm of the weft is 6 to 20. After weaving in a 2/2 oblique weave weave structure with a single layer of weft, a smoothing process is performed on the filter cake contact surface side, and the filter cake contact surface is directed to the filter cake non-contact surface. The air permeability of 125 Pa pressurized air by the Frazier method is 60 cm 3
/ Cm 2 · min. To 600 cm 3 / cm 2 · min., And a filter cloth having a maximum pore diameter measured by a bubble point method of 150 μm or less.
【００２２】前記２／２斜文よこうね織組織としては、
２／２正斜文よこうね織、又は、２／２破れ斜文よこう
ね織、又は、２／２杉綾よこうね織のいずれかを用い
る。As the 2/2 oblique weave woven structure,
Either 2/2 regular oblique weaving weave, 2/2 torn oblique weaving weaving, or 2/2 cedar weaving weaving is used.
【００２３】ここで、前記「濾過布の巻上がり」の状況
について更に説明する。Here, the situation of the "winding of the filter cloth" will be further described.
【００２４】図１（Ａ）〜（Ｃ）には、前記「無薬注長
時間脱水」の方式により固液分離を行う単式フィルター
プレスの濾室の一例が縦断面図として示されている。FIGS. 1 (A) to 1 (C) are longitudinal sectional views showing an example of a filter chamber of a single-type filter press for performing solid-liquid separation by the above-mentioned "chemical-free long-time dehydration" method.
【００２５】図１(Ａ)は、２枚の濾板(1)(1)の各両面に
展張され、上部展張バー(3)(3)に繋がれたバネ(4)(4)を
介して配設される濾布(2)(2)で形成された濾室(5)(5)
に、浄水設備の濁質濃縮スラッジが圧入される直前の状
態である。FIG. 1 (A) shows two filter plates (1) and (1) extended on both sides by springs (4) and (4) connected to upper extension bars (3) and (3). Chamber (5) (5) formed of filter cloth (2) (2)
The state immediately before the turbid concentrated sludge of the water purification facility is injected.
【００２６】図１(Ｂ)は、濾布(2)(2)で形成された濾室
(5)(5)に給泥孔(6)(6)から浄水設備の濁質濃縮スラッジ
が圧入されて濾布(2')(2')の間に濾過ケーキ(7)(7)が形
成された状態である。FIG. 1 (B) shows a filter chamber formed of filter cloths (2) and (2).
(5) (5) The turbid condensed sludge of the water purification equipment is injected into the mud holes (6) and (6) from the mud holes (6) and (6), and the filter cakes (7) and (7) are placed between the filter cloths (2 ') and (2'). It is in a formed state.
【００２７】図１(Ｃ)は、加圧脱水の後、濾板(1)(1)が
開放されて、濾室(5)(5)に形成された濾過ケーキ(7)が
自重により落下して排出される状態である。同図は、濾
布(2”)(２”)が濾過ケーキ接触面側の経糸方向へ巻上
がっている状態(８)(８)も表す。FIG. 1 (C) shows that after dehydration under pressure, the filter plates (1) and (1) are opened, and the filter cake (7) formed in the filter chambers (5) and (5) falls by its own weight. And is discharged. The figure also shows a state (8) (8) in which the filter cloth (2 ″) (2 ″) is wound in the warp direction on the filter cake contact surface side.
【００２８】該濾布(2)(2)の上部は、上部展張バー(3)
(3)に繋がれたバネ(4)(4)によって上下方向には張り気
味となるが、該濾布(2)(2)の下部は濾液により湿潤した
濾布の自重で下方に垂れ下がる。殊に従来多用されてき
た５枚朱子織組織の濾過布では、経糸及び緯糸の浮き長
さが濾過布の表面側及び裏面側で異なるために、この濾
過布下部の自重による垂れ下がり部分で、経糸が長浮き
する濾過ケーキ接触面側の経糸方向へ「濾過布の巻上が
り（カール）」が発生し、緯糸が長浮きする濾過ケーキ
非接触面側の緯糸方向へ「濾過布の巻上がり（カー
ル）」が発生し易い。The upper part of the filter cloths (2) and (2) is an upper extension bar (3).
The springs (4) and (4) connected to (3) are slightly stiff in the vertical direction, but the lower part of the filter cloths (2) and (2) hangs downward due to the weight of the filter cloth moistened with the filtrate. In particular, in the case of a five-sheet satin-woven filter cloth which has been frequently used in the past, since the floating lengths of the warp and the weft are different on the front side and the back side of the filter cloth, the warp is formed at the lower part of the filter cloth by its own weight. In the warp direction on the side of the filter cake contact surface where the filter cloth floats long, the "curling of the filter cloth (curl)" occurs, and in the direction of the weft on the side of the filter cake non-contact surface where the weft floats long, the "roll of the filter cloth (curl)" ) "Easily occurs.
【００２９】図２(Ａ１)〜(Ａ４)は、従来より用いられ
ている緯単層５枚朱子織組織の濾過布の織物表裏面並び
に断面の状況を表した図である。同図 (Ａ１)は濾過布
の表面（濾過ケーキ接触面側）、同図 (Ａ２)は濾過布
の裏面（濾過ケーキ非接触面側）、同図(Ａ３)は経糸方
向(ＰＡ−ＰＡ)における断面図、同図(Ａ４)は緯糸方向
(ＱＡ−ＱＡ)における断面図である。FIGS. 2 (A1) to 2 (A4) are views showing the state of the front and back surfaces and the cross section of a conventionally used single-layer five-layer satin-woven filter cloth. The same figure (A1) is the front side of the filter cloth (the filter cake contact surface side), the same figure (A2) is the rear side of the filter cloth (the filter cake non-contact surface side), and the same figure (A3) is the warp direction (PA-PA). (A4) is a weft direction.
It is sectional drawing in (QA-QA).
【００３０】この５枚朱子織組織の濾過布は、経糸(２
３)が、連続して配置された４本の緯糸(２４)に対して
濾過布の表面（濾過ケーキ接触面側）(２１)を覆い、続
く１本の緯糸(２４)に対して濾過布の裏面（濾過ケーキ
非接触面側）(２２)を覆うべく織成される。この織組織
で織成した濾過布では、経糸が濾過布の表面(ケーキ接
触面)で長浮き(２１１)すると共に、緯糸が濾過布の裏
面(ケーキ非接触面)で長浮き(２１２)するため、経糸又
は緯糸が長浮きした側においてそれぞれの糸の配設され
る方向に巻上がる（カールする）状態が現れる。The five-sheet satin weave filter cloth is made of a warp (2
3) covers the surface of the filter cloth (the filter cake contact surface side) (21) with respect to the four wefts (24) arranged continuously, and filters the cloth with the next one weft (24). (The non-contact surface side of the filter cake) (22). In the filter cloth woven with this weave, the warp floats (211) on the surface of the filter cloth (cake contact surface) and the weft floats (212) on the back surface of the filter cloth (cake non-contact surface). Then, a state in which the warp or the weft is wound (curled) in the direction in which the respective yarns are arranged on the side on which the warp or the weft is prolonged appears.
【００３１】５枚朱子のような経糸及び緯糸の浮き長さ
が濾過布の表面側及び裏面側で異なる織組織の場合に
「濾過布の巻上がり（カール）」が発生するのは、製織
時及びヒートセット等加工時に経糸や緯糸が受けた応力
や寸法変化の影響度合いが、織組織の表面側及び裏面側
での浮き長さによって異なるためと考えられる。特に、
前記６ナイロン製モノフィラメントを主体とする５枚朱
子織組織の濾過布では、素材自体のセット性が乏しくカ
レンダー加工の効果が薄れやすいため、この「濾過布の
巻上がり（カール）」の傾向が顕著となり、巻上がった
濾過布の端部が加圧脱水操作時に濾板(1)(1)間に挟ま
れ、折れ込まれて、濾板(1)(1)同士の密着状態を部分的
に損ない濾液の洩出や濾過布の損傷など操作上の問題が
生じたり、期待される濾過布の耐用期間を満たせない場
合も有る。In the case of a weaving structure in which the floating lengths of the warp yarns and the weft yarns such as 5-sheet satin are different on the front side and the back side of the filter cloth, "curling of the filter cloth" occurs when weaving. It is considered that the degree of influence of the stress and dimensional change applied to the warp or weft during processing such as heat setting differs depending on the floating length on the front side and the back side of the weave structure. In particular,
In the case of the 5-sheet satin-woven filter cloth mainly composed of the 6-nylon monofilament, the setability of the material itself is poor and the effect of calendering tends to be weakened. The end of the wound filter cloth is sandwiched between the filter plates (1) and (1) during the pressure dehydration operation and is folded, and the state of close contact between the filter plates (1) and (1) is partially reduced. In some cases, operational problems such as loss of filtrate and damage to the filter cloth may occur, or the expected life of the filter cloth may not be satisfied.
【００３２】したがって、本発明の濾過布は、経糸及び
／又は緯糸に中実の合成樹脂モノフィラメントを用い
て、緯単層の２／２斜文よこうね織組織で製織した後、
濾過ケーキ接触面側に平滑化加工を施す。緯単層の２／
２斜文よこうね織組織では２／２斜文織組織と同じく、
経糸が、連続して配置された２本の緯糸に対して濾過布
の表面を覆い、続く２本の緯糸に対して濾過布の裏面を
覆うように織成されるので、経糸或いは緯糸の濾布表面
側及び裏面側での浮き長さが等しくなり、濾布表面側で
の経糸方向への巻上がりや、濾布裏面側での緯糸方向へ
の巻上がりが完全に回避されるのである。Accordingly, the filter cloth of the present invention is woven in a weft single-layer 2/2 oblique weave woven structure using a solid synthetic resin monofilament as the warp and / or weft.
A smoothing process is performed on the filter cake contact surface side. 2 /
In the 2 weave weaving organization, as in the 2/2 weaving weaving organization,
Since the warp is woven so as to cover the surface of the filter cloth with respect to two consecutively arranged wefts and to cover the back surface of the filter cloth with respect to the next two wefts, the warp or the weft is filtered. The floating lengths on the front side and the back side of the cloth become equal, and the winding in the warp direction on the front side of the filter cloth and the winding in the weft direction on the back side of the filter cloth are completely avoided.
【００３３】本発明の実施に係わる緯単層の２／２斜文
よこうね織組織としては、２／２正斜文よこうね織、又
は、２／２破れ斜文よこうね織、又は、２／２杉綾よこ
うね織のいずれかを用いる。２／２破れ斜文よこうね
織、又は、２／２杉綾よこうね織を用いる場合には、緯
糸の斜行が極めて少なく、該濾過布の製作時の作業性や
フィルタープレスへの装着作業性に大いに貢献する。As the weft single-layer 2/2 oblique weave texture according to the practice of the present invention, 2/2 regular oblique weave weave, or 2/2 torn oblique weave weave, Alternatively, use any of 2/2 Aya Sugi Yone. In the case of using 2/2 torn weaving weaving or 2/2 cedar twill weaving, the skew of the weft is extremely small, and the workability at the time of manufacturing the filter cloth and the mounting to the filter press It greatly contributes to workability.
【００３４】図３(Ｂ１)〜(Ｂ４)は、本発明の実施に係
わる緯単層２／２正斜文よこうね織組織の濾過布の織物
表裏面、並びに、断面の状況を表した図である。同図
(Ｂ１)は濾過布の表面（濾過ケーキ接触面側）、同図
(Ｂ２)は濾過布の裏面（濾過ケーキ非接触面側）、同図
(Ｂ３)は経糸方向(ＰＢ−ＰＢ)における断面図、同図
(Ｂ４)は緯糸方向(ＱＢ−ＱＢ)における断面図である。FIGS. 3 (B1) to 3 (B4) show the condition of the front and back surfaces and the cross section of a filter cloth having a weft single layer 2/2 regular oblique weave woven structure according to the embodiment of the present invention. FIG. Same figure
(B1) is the surface of the filter cloth (the filter cake contact surface side),
(B2) is the back side of the filter cloth (non-contact side of the filter cake),
(B3) is a cross-sectional view in the warp direction (PB-PB),
(B4) is a sectional view in the weft direction (QB-QB).
【００３５】図４には、従来より用いられている緯単層
２／２正斜文織組織の濾過布の織物表面の状況を示し
た。FIG. 4 shows the state of the fabric surface of a conventional filter cloth having a weft single layer 2/2 regular oblique weave structure.
【００３６】図３(Ｂ１)〜(Ｂ４)で、経糸(２８)が濾過
布の表面(２６)で緯糸(２９)２本分浮き、濾過布の裏面
(２７)で緯糸２本分浮いているのが見える。この織組織
では、経糸(２８)或いは緯糸(２９)の濾過布表面側(２
６)及び裏面側(２７)での浮き長さが等しくなり、濾布
表面側での経糸方向への巻上がりや、濾布裏面側での緯
糸方向への巻上がりが生じない。3 (B1) to 3 (B4), the warp (28) floats by two wefts (29) on the surface (26) of the filter cloth, and the back of the filter cloth.
At (27), it can be seen that two wefts are floating. In this woven structure, the warp (28) or the weft (29) has a filter cloth surface side (2
6) and the floating length on the back side (27) are equal, so that the winding in the warp direction on the front side of the filter cloth and the winding in the weft direction on the back side of the filter cloth do not occur.
【００３７】図５(Ａ)〜(Ｃ)は、本発明の実施に係わる
緯単層２／２斜文よこうね織組織の濾過布の織物表面の
概念図である。同図(Ａ)は２／２正斜文よこうね織、同
図(Ｂ)は２／２破れ斜文よこうね織、同図(Ｃ)は２／２
杉綾よこうね織の、各表面の概念図を示した。FIGS. 5A to 5C are conceptual diagrams of the surface of a woven fabric of a filter cloth having a weft single layer 2/2 oblique weave weave structure according to an embodiment of the present invention. (A) is a 2/2 regular oblique weaving weave, (B) is a 2/2 broken oblique weaving weaving, and (C) is a 2/2 weaving.
A conceptual diagram of each surface of Yokone Sugiaya is shown.
【００３８】図３(Ｂ１)〜(Ｂ４)では、経糸(２８)(２
８)と緯糸(２９)(２９)の交絡を明確にするために、経
糸の間隔を広げて概念を示したが、実際には、図5(Ａ)
〜(Ｃ)の如く、隣接する経糸同士(４０３)(４０３)、特
に引き揃えた２本の経糸同士は完全に密着して、２／２
斜文よこうね織組織にして良好な緻密性と表面平滑性が
確保されている。In FIGS. 3 (B1) to 3 (B4), the warp yarns (28) (2)
In order to clarify the confounding of 8) and the wefts (29) and (29), the concept was shown by widening the intervals between the warp threads.
As shown in (C) to (C), adjacent warps (403) and (403), in particular, two aligned warps are completely adhered to each other, and
Good denseness and surface smoothness are ensured in the oblique weave woven structure.
【００３９】図３(Ｂ１)及び(Ｂ３)から解るように、引
き揃えた２本の経糸同士(２８)(２８)は、濾過布の表面
(２６)及び濾過布の裏面(２７)において、並びに、表面
から裏面へ切り替わる部分及び裏面から表面へ切り替わ
る部分において、常に同じく緯糸(２９)(２９)と織組織
されるのであるが、これら引き揃えた２本の経糸同士
(２８)(２８)が完全に密着するためには、２／２斜文よ
こうね織組織にて織成するだけでは不充分であるため、
本発明では、よこうね織組織とすると同時に、経糸を構
成する合成樹脂モノフィラメントの直径と該経糸の２
５．４ｍｍ間の糸本数との積を好適な範囲とすること
で、隣接する経糸同士の経糸方向に沿っての密着状態を
完全にして、特に引き揃えた２本の経糸同士間での経糸
全長に沿っての隙間が殆ど無くなるようにして、より低
い通気度を達成して微細粒子の捕捉性能を一層向上させ
ると同時に、良好な表面平滑性を確保する。As can be seen from FIGS. 3 (B1) and (B3), the two aligned warps (28) and (28) are formed on the surface of the filter cloth.
(26) and the back surface (27) of the filter cloth, as well as the portion that switches from the front surface to the back surface and the portion that switches from the back surface to the front surface, are always woven with the wefts (29) and (29). Two warps aligned
(28) In order for (28) to completely adhere, it is not enough to weave with 2/2 slanted weave woven structure.
In the present invention, the diameter of the synthetic resin monofilaments constituting the warp and the diameter of the
By setting the product of the number of yarns between 5.4 mm and the number of yarns in a suitable range, the state of contact between adjacent warp yarns in the warp direction is completed, and in particular, the warp yarns between two aligned warp yarns The gap along the entire length is almost eliminated so that a lower air permeability is achieved to further improve the capturing performance of the fine particles, and at the same time, to ensure good surface smoothness.
【００４０】図４に示した経糸を引き揃えない通常の２
／２正斜文織組織では、経糸方向に沿っての隣り合った
経糸同士(３３)(３３)が密着可能な長さは、濾過布の表
面側又は裏面側において、経糸方向に緯糸４本当たり１
本分に相当する長さだけであるため、前記経糸を構成す
る合成樹脂モノフィラメントの直径と該経糸の２５．４
ｍｍ間の糸本数との積を好適な範囲とすることによる、
濾過布の低通気度化や微細粒子捕捉性能の向上効果は、
引き揃えた２本の経糸同士が経糸全長に亘って密着可能
な２／２斜文よこうね織組織の場合には及ばない。本発
明の様に、２／２斜文よこうね織組織で織成する場合
に、同時に、経糸の直径と糸本数との積を好適な範囲と
することで、はじめて前記効果が顕著になり、従来達成
が困難であった低通気度範囲までの調整が可能となるの
である。[0040] As shown in FIG.
/ 2 In the regular oblique weaving design, the length of the adjacent warp yarns (33) and (33) along the warp direction that can be closely attached is four wefts in the warp direction on the front side or the back side of the filter cloth. 1 per
Since it is only the length corresponding to the main thread, the diameter of the synthetic resin monofilament constituting the warp and the 25.4 mm of the warp are used.
By making the product with the number of yarns between mm a suitable range,
The effect of lowering the air permeability of the filter cloth and improving the fine particle trapping performance is as follows.
This is far from the case of a 2/2 slanted weave woven structure in which two aligned warps can be in close contact with each other over the entire length of the warp. As in the present invention, when weaving with a 2/2 oblique weave texture, the above-mentioned effect becomes remarkable for the first time by setting the product of the diameter of the warp and the number of yarns in a suitable range. In addition, adjustment to a low air permeability range, which has conventionally been difficult to achieve, becomes possible.
【００４１】一般には、固液分離を行う単式フィルター
プレス用濾過布として好適な微細粒子に対する粒子捕捉
性と耐目詰まり性を有する濾過布、特に、浄水設備にお
ける所謂「無薬注スラッジ」に適用する濾過布として有
効な緻密性を合成樹脂モノフィラメント製で達成するに
は、経験的に、フラジール形法による１２５Ｐａ加圧空
気の通気度が６００ｃｍ3／ｃｍ2・min.以下で、バブル
ポイント法での測定による最大濾材孔径は１５０μｍ以
下であることが好ましいとされている。通気度は低すぎ
ると濾過処理能力に大きく影響し、その下限は２００ｃ
ｍ3／ｃｍ2・min.であるとされている。前記浄水設備の
「無薬注スラッジ」以外の用途においては、通気度の下
限が６０ｃｍ3／ｃｍ2・min.まで必要とされる場合も有
る。In general, the present invention is applied to a filter cloth having a property of trapping fine particles and being resistant to clogging, which is suitable as a filter cloth for a single type filter press for performing solid-liquid separation, and particularly to a so-called “chemical-free sludge” in water purification equipment. Efficiently, in order to achieve a compactness made of a synthetic resin monofilament as a filter cloth, the air permeability of 125 Pa pressurized air by the Frazier method is 600 cm 3 / cm 2 · min. It is considered that the maximum pore size of the filter medium as measured by the above is preferably 150 μm or less. If the air permeability is too low, it greatly affects the filtration capacity, and the lower limit is 200 c
m 3 / cm 2 · min. In applications other than the “chemical-free injection sludge” of the water purification equipment, the lower limit of the air permeability may be required up to 60 cm 3 / cm 2 · min.
【００４２】この性能を経糸及び緯糸に合成樹脂モノフ
ィラメントを用いて製織した織物で得るには、経験的に
経糸の太さを直径０.２ｍｍ〜０.３ｍｍの範囲とし、緯
糸の太さを直径０.２０ｍｍ〜０.４０ｍｍの範囲にしな
ければならないとされている。緻密さを優先させて糸を
細くすれば、フィルタープレスに使用される濾過布とし
て要求される剛性や耐久性を確保するのが困難となり、
摩擦作用や強圧下の伸長作用に耐えることが出来ない。
剛性や耐久性を優先させて糸を太くすると緻密さが犠牲
になるため、経糸及び緯糸の太さは前記の範囲に制約さ
れる。In order to obtain this performance from a woven fabric woven by using a synthetic resin monofilament for the warp and the weft, the thickness of the warp is empirically set to a range of 0.2 mm to 0.3 mm, and the thickness of the weft is set to the diameter. It has to be in the range of 0.20 mm to 0.40 mm. If the thread is made thinner with priority given to denseness, it will be difficult to secure the rigidity and durability required for filter cloth used for filter press,
It cannot withstand frictional action or elongation under strong pressure.
If the yarn is made thicker by giving priority to rigidity and durability, the denseness is sacrificed, and the thickness of the warp and the weft is restricted to the above range.
【００４３】本発明では、前記の太さ範囲の合成樹脂モ
ノフィラメントを経糸及び緯糸に用い、且つ、織組織を
緯単層の２／２斜文よこうね織組織とすると共に、前記
経糸の直径と該経糸の２５．４ｍｍ間の糸本数との積を
２８〜３０の範囲とし、前記緯糸の直径と該緯糸の２
５．４ｍｍ間の糸本数との積を６〜２０の範囲として、
製織した後に、濾過ケーキ接触面側に平滑化加工を施し
て、前記６０ｃｍ3／ｃ2・min.〜６００ｃｍ3／ｃｍ2・
min.の通気度範囲並びにバブルポイント法測定による最
大濾材孔径測定値１５０μｍ以下を達成した。特に本発
明では、前記構成とすることにより、従来用いられてき
た合成樹脂モノフィラメント製濾過布で達成が困難であ
った、６０ｃｍ3／ｃｍ2・min.までの通気度調整を可能
とした。In the present invention, the synthetic resin monofilament having the above-mentioned thickness range is used for the warp and the weft, the weaving structure is a single weft 2/2 oblique weft weave structure, and the diameter of the warp is And the product of the number of yarns between 25.4 mm of the warp is in the range of 28 to 30, and the diameter of the weft and 2 of the weft
Assuming that the product of the number of yarns between 5.4 mm is in the range of 6 to 20,
After weaving, subjected to a smoothing processing to the filter cake contacting surface, the 60cm 3 / c 2 · min.~600cm 3 / cm 2 ·
The air permeability range of min. and the maximum pore size measured by the bubble point method of 150 μm or less were achieved. In particular, in the present invention, by adopting the above configuration, it is possible to adjust the air permeability up to 60 cm 3 / cm 2 · min., Which was difficult to achieve with a conventionally used filter cloth made of synthetic resin monofilament.
【００４４】織組織を２／２斜文織組織とすることで、
経糸の浮き長さが５枚朱子織組織に比べて短くなるの
で、表面平滑性や濾過ケーキの剥離性には不利となると
も考えられるが、交絡点が増えて経糸と緯糸の密着度合
いが高められるため、濾過布織物の剛性や形態安定性が
向上すると共に、織物全面での目開きが小さくなり、微
細粒子に対する捕捉性能が高まる。また、濾過布織物の
剛性が向上するため、例えば加圧脱水時に濾過布が、濾
板表面に多数配設されたディスタンスピースの形状に沿
って変形を余儀なくされる場合でも、ディスタンスピー
ス頂部付近に接する織物部分の変形量が少なくなり局所
的な目開きの発生が抑制されるので、それが元での粒子
洩れの発生を防ぐことが出来る。By making the weave structure a 2/2 oblique weave structure,
Since the floating length of the warp is shorter than that of the five-sheet satin weave, it may be disadvantageous for the surface smoothness and the removability of the filter cake. However, the number of entanglement points increases and the degree of adhesion between the warp and the weft increases. Therefore, the rigidity and morphological stability of the filter cloth are improved, and the openings on the entire surface of the cloth are reduced, so that the performance of capturing fine particles is improved. Further, since the rigidity of the filter cloth is improved, for example, when the filter cloth is forced to deform along the shape of the distance pieces arranged on the filter plate surface during pressure dehydration, even near the top of the distance pieces, Since the amount of deformation of the contacting woven fabric portion is reduced and the occurrence of local openings is suppressed, it is possible to prevent the occurrence of particle leakage due to this.
【００４５】更には、織組織を経糸２本引き揃えの斜文
ぬきうね織組織とし、併せて、経糸の直径と該経糸の２
５．４ｍｍ間の糸本数との積を２８〜３０の範囲とする
ことで、隣り合った経糸同士が経糸方向に沿って完全に
密着して、特に引き揃えた２本の経糸同士間での隙間が
殆ど無くなり、より低い通気度の達成が可能となり、微
細粒子の捕捉性能が一層向上すると共に、濾過布表面で
の経糸表出部各部の幅が広くなって、表面平滑性や濾過
ケーキ剥離性を補うことが出来るのである。前記経糸の
直径と糸本数との積が２８に満たない場合には、引き揃
えた経糸同士の密着が不充分となり、濾過ケーキ接触面
に施す表面平滑化加工による通気度の調整が困難で前記
通気度範囲を達成できず、前記経糸の直径と糸本数との
積が３０を越える場合には、濾過布の目詰まりによる処
理能力の低下が著しくなるため、２８〜３０の範囲が好
適である。Further, the weaving structure is a slanted awning weaving structure in which two warps are aligned, and the diameter of the warp and the warp 2
By setting the product of the number of yarns between 5.4 mm and the number of yarns in the range of 28 to 30, the adjacent warps are completely adhered to each other in the warp direction, and particularly, the warp between the two aligned warps. There are almost no gaps, lower air permeability can be achieved, fine particle trapping performance is further improved, and the width of each warp exposed portion on the surface of the filter cloth is increased, so that surface smoothness and filter cake peeling are eliminated. It can make up for sex. If the product of the warp diameter and the number of yarns is less than 28, the tightness between the aligned warps becomes insufficient, and it is difficult to adjust the air permeability by surface smoothing applied to the contact surface of the filter cake. When the product of the diameter of the warp and the number of yarns exceeds 30 because the air permeability range cannot be achieved, the treatment capacity is significantly reduced due to clogging of the filter cloth, so the range of 28 to 30 is preferable. .
【００４６】また、緯糸の直径と該緯糸の２５．４ｍｍ
間の糸本数との積は６〜２０の範囲とする。前記緯糸の
直径と糸本数との積が６に満たない場合には、経糸と緯
糸の相互の拘束が不充分となり、濾過ケーキ接触面に施
す表面平滑化加工による通気度の調整が困難で前記通気
度範囲を達成できない上に、必要な剛性と形態の安定性
が得られない。前記緯糸の直径と糸本数との積が２０を
越える場合には、濾過布の目詰まりによる処理能力の低
下が著しく、また、製織時の打ち込みが困難になる。The diameter of the weft and the 25.4 mm
The product with the number of yarns between them is in the range of 6 to 20. When the product of the diameter of the weft and the number of yarns is less than 6, mutual constraint between the warp and the weft becomes insufficient, and it is difficult to adjust the air permeability by surface smoothing applied to the contact surface of the filter cake. In addition to not being able to achieve the air permeability range, the required rigidity and morphological stability cannot be obtained. When the product of the diameter of the weft yarn and the number of yarns exceeds 20, the processing capacity is significantly reduced due to clogging of the filter cloth, and driving during weaving becomes difficult.
【００４７】尚、本発明に於ける「平滑化加工」とは、
カレンダー加工等、織物表面を加熱・加圧して滑らかに
仕上げる織物加工を言う。In the present invention, "smoothing processing" means
This refers to fabric processing such as calendering that heats and presses the fabric surface to finish it smoothly.
【００４８】[0048]
【実施例】以上に述べた事を考慮して目的のフィルター
プレスを実施例１〜実施例３並びに〔比較例１〕〜〔比
較例４〕を試作した結果は、表１の通りである。EXAMPLES The results of trial production of the target filter presses of Examples 1 to 3 and [Comparative Examples 1] to [Comparative Example 4] in consideration of the above are shown in Table 1.
【００４９】表中に記載は無いが、実施例１〜実施例３
並びに〔比較例１〕〜〔比較例４〕は全て、製織後にカ
レンダー加工による表面平滑化を施した。Although not described in the table, Examples 1 to 3
All of [Comparative Example 1] to [Comparative Example 4] were subjected to calendering to smooth the surface after weaving.
【００５０】通気度の測定はフラジール形法により、最
大孔径及び平均孔径の測定はバブルポイント法による。The air permeability is measured by the Frazier method, and the maximum pore diameter and the average pore diameter are measured by the bubble point method.
【００５１】[0051]
【表１】 [Table 1]
【００５２】表１に示すように、実施例１〜実施例３
は、経糸の直径が０．２ｍｍ〜０．３ｍｍの範囲、緯糸
の直径が０．２ｍｍ〜０．４ｍｍの範囲とし、且つ、前
記経糸の直径と該経糸の２５．４ｍｍ間の糸本数との積
を２８〜３０の範囲とし、前記緯糸の直径と該緯糸の２
５．４ｍｍ間の糸本数との積を６〜２０の範囲として、
織組織を実施例１と実施例３は２／２正斜文よこうね織
に、実施例２は２／２杉綾よこうね織に製織したが、全
て、通気度が６０ｃｍ3／ｃｍ2・min.〜６００ｃｍ3／
ｃｍ2・min.の範囲、バブルポイント法による最大孔径
測定値が１５０μｍ以下の目標値を達成した。As shown in Table 1, Examples 1 to 3
The diameter of the warp is in the range of 0.2 mm to 0.3 mm, the diameter of the weft is in the range of 0.2 mm to 0.4 mm, and the diameter of the warp is equal to the number of yarns between 25.4 mm of the warp. The product is in the range of 28 to 30, and the diameter of the weft and the 2
Assuming that the product of the number of yarns between 5.4 mm is in the range of 6 to 20,
Example 1 and Example 3 were woven into a 2/2 regular oblique weaving weave, and Example 2 was woven into a 2/2 cedar weaving weaving, all having a permeability of 60 cm 3 / cm 2.・ Min. ～ 600cm 3 /
In the range of cm 2 · min., the maximum pore diameter measured by the bubble point method reached the target value of 150 μm or less.
【００５３】また、〔比較例１〕〜〔比較例４〕では、
５枚朱子で織成した〔比較例２〕と〔比較例４〕が通気
度又はバブルポイント法による最大孔径測定値の目標値
を達成出来なかった。In [Comparative Examples 1] to [Comparative Example 4],
[Comparative Example 2] and [Comparative Example 4] woven with five satins could not achieve the target value of the maximum pore diameter measured by the air permeability or the bubble point method.
【００５４】前記（実施例１）〜（実施例３）並びに
（比較例１）〜（比較例４）の各濾過布を、図６に示す
通り、濾板(50)…(50)に設置して、実使用における「各
実施例の濾過布」と「各比較例の濾過布」の性能比較を
行った。Each of the filter cloths of (Example 1) to (Example 3) and (Comparative Example 1) to (Comparative Example 4) was set on filter plates (50) to (50) as shown in FIG. Then, performance comparison between “the filter cloth of each example” and “the filter cloth of each comparative example” in actual use was performed.
【００５５】すなわち、図６に示す通り、濾板(50)(50)
(50)(50)・・・・(50)(50)に、（実施例１）の濾過布(50
1)、（実施例２）の濾過布(502)、（実施例３）の濾過
布(503)、並びに（比較例１）の濾過布(511)、（比較例
２）の濾過布(512)、（比較例３）の濾過布(513)、（比
較例４）の濾過布(514)を設置した。That is, as shown in FIG. 6, the filter plates (50) and (50)
(50) (50) ・ ・ ・ ・ (50) (50) is added to the filter cloth (50
1), the filter cloth (502) of (Example 2), the filter cloth (503) of (Example 3), the filter cloth (511) of (Comparative Example 1), and the filter cloth (512) of (Comparative Example 2) ), A filter cloth (513) of (Comparative Example 3) and a filter cloth (514) of (Comparative Example 4) were installed.
【００５６】また、その使用期間に於ける圧入汚泥の平
均的な性状は、表２の通りであった。Table 2 shows the average properties of the injected sludge during the use period.
【００５７】[0057]
【表２】 [Table 2]
【００５８】そして、前記（実施例１）〜（実施例３）
並びに（比較例１）〜（比較例４）の各濾過布の使用期
間に於けるフィルタープレスの操作条件は、表３の通り
であった。The above (Example 1) to (Example 3)
The operating conditions of the filter press during the use period of each filter cloth of (Comparative Example 1) to (Comparative Example 4) are as shown in Table 3.
【００５９】[0059]
【表３】 [Table 3]
【００６０】前記条件の下で使用された前記（実施例
１）〜（実施例３）並びに（比較例１）〜（比較例４）
の各濾過布の使用評価は、表４の通りであった。(Examples 1) to (Example 3) and (Comparative Examples 1) to (Comparative Example 4) used under the above conditions
Table 4 shows the evaluation of use of each filter cloth.
【００６１】[0061]
【表４】 [Table 4]
【００６２】[0062]
【発明の効果】本発明の濾過布は、前記実使用における
性能評価のとおり、使用開始後２２ヶ月と言う長期間経
過後でも、濾板表面の汚れもないことから、濾過不良
（粒子洩れ）の痕跡も認められず、要求される粒子捕捉
性能と耐目詰まり性を充分に満たす。As described above, the filter cloth of the present invention has poor filtration (particle leakage) because there is no stain on the filter plate surface even after a long period of 22 months from the start of use, as described in the performance evaluation in actual use. No trace is recognized, and the required particle trapping performance and clogging resistance are sufficiently satisfied.
【００６３】また、経糸の長浮きが比較的小さい２／２
斜文織組織とするも、経糸の直径と糸本数との積を規定
したよこうね織組織で織成して経糸同士を完全に密着さ
せると共に、濾過ケーキ接触面側に平滑化加工を施すの
で,表面平滑性が確保されており濾過ケーキの剥離も良
好であると共に、従来用いられてきた合成樹脂モノフィ
ラメント製濾過布では達成が困難であった、６０ｃｍ3
／ｃｍ2・min.までの通気度調整が可能である。In addition, the length of the warp is relatively small.
Even though it has a slanted weave design, it is woven in a yokoso weave design that defines the product of the diameter of the warp and the number of yarns so that the warps are completely in close contact with each other and the filter cake contact surface side is smoothed. together with the surface smoothness is good peeling of being secured filter cake achieved was difficult in the synthetic resin monofilament made filter cloth which has been used conventionally, 60cm 3
/ Cm 2 · min.
【００６４】更に、２／２斜文織を基本とするよこうね
織の特徴が発揮されて、従来からの経糸長浮き組織の濾
過布で往々に認められる長浮き方向への濾過布の巻上が
りが殆ど無いため、濾液の洩出や濾過布の損傷など操作
上の問題が発生せず、期待される耐用期間を満たす上
に、多数の濾室を備えたフィルタープレスへの装着時の
作業性、及び、該フィルタープレス用濾過布の縫製工程
での作業性も良好である。Furthermore, the characteristic of the yolk weave based on the 2/2 oblique weave is exhibited, and the winding of the filter cloth in the long float direction, which is often recognized in the conventional filter cloth having a warp long float structure. Since there is almost no rise, there is no operational problem such as leakage of the filtrate or damage to the filter cloth.In addition to satisfying the expected service life, work at the time of mounting on a filter press equipped with many filter chambers The workability in the sewing process of the filter cloth for the filter press is also good.
【００６５】上記に加えて、６ナイロンおよび６６ナイ
ロンの少なくとも一方より成るナイロン製モノフィラメ
ントを用いる場合は、浄水設備における粘凋な微細粒子
を多く含む所謂「無薬注スラッジ」にも好適な粒子捕捉
性能と脱水ケーキ剥離・離脱性を有する濾過布となる。In addition to the above, when a nylon monofilament composed of at least one of nylon 6 and nylon 66 is used, particle trapping which is suitable for so-called “drugless sludge” containing a large amount of viscous fine particles in water purification equipment A filter cloth having performance and dewatering cake peeling / removing properties.
【００６６】したがって、優れた濾過性能と耐久性を有
する濾過布として、固液分離を行う単式フィルタープレ
スに好適に使用する事が出来て、長期に安定且つ円滑な
フィルタープレスの運転を可能にする。Therefore, it can be suitably used as a filter cloth having excellent filtration performance and durability in a single-type filter press for performing solid-liquid separation, and enables stable and smooth operation of the filter press for a long period of time. .
【図１】（Ａ）は、２枚の濾板の各両面に展張され、上
部展張バーに繁がれたバネを介して配設される濾布で形
成された濾室に、浄化設備の濁質濃縮スラッジが挿入さ
れる直前の状態を示す図面。（Ｂ）は、濾板で形成され
た濾室に給泥孔から浄水設備の濁質濃縮スラッジが挿入
されて濾布の間に濾過ケーキが形成された状態を示す図
面。（Ｃ）は、加工脱水の後、濾板が開放されて、濾室
に形成され濾布ケーキが自重により落下して排出される
状態を示す図面。FIG. 1 (A) shows a filter chamber formed of a filter cloth which is spread on both sides of two filter plates and which is arranged via a spring spread over an upper expansion bar, and a filter chamber for purification equipment. The figure which shows the state just before a turbid | concentrated sludge is inserted. (B) is a drawing showing a state in which a turbid condensed sludge of water purification equipment is inserted from a mud hole into a filter chamber formed by a filter plate, and a filter cake is formed between filter cloths. (C) is a drawing showing a state in which a filter plate is opened after processing and dewatering, a filter cloth cake formed in a filter chamber is dropped by its own weight and discharged.
【図２】(Ａ１)〜(Ａ４)は、従来技術の緯単層５枚朱子
織組織の濾過布の織物表裏面、並びに、断面の状況を表
した図面。FIGS. 2 (A1) to (A4) are drawings showing the state of the front and back surfaces and the cross section of a conventional filter cloth having a single weft single layer satin weave structure.
【図３】(Ｂ１)〜(Ｂ４)は、本発明に係る緯単層２／２
正斜文よこうね織組織の濾過布の織物表裏面、並びに、
断面の状況を表した図面。FIGS. 3 (B1) to (B4) show weft single layers 2/2 according to the present invention.
Front and back fabric of filter cloth with regular oblique writing woven fabric, and
Drawing showing the condition of the cross section.
【図４】従来技術の緯単層２／２正斜文織組織の濾過布
の織物表面の状況を表した図面。FIG. 4 is a view showing the state of the surface of a woven fabric of a conventional filter cloth having a weft single layer 2/2 regular oblique weave structure.
【図５】(Ａ)は、本発明に係る２／２正斜文よこうね織
組織の織物表面の概念図。(Ｂ)は、本発明に係わる２／
２破れ斜文よこうね織組織の織物表面の概念図。(Ｃ)
は、本発明に係わる２／２杉綾よこうね織組織の織物表
面の概念図。FIG. 5A is a conceptual diagram of the surface of a woven fabric having a 2/2 regular oblique weave weave structure according to the present invention. (B) is a graph showing 2 /
2 is a conceptual diagram of the surface of a woven fabric having a torn weave texture. (C)
1 is a conceptual diagram of a woven fabric surface having a 2/2 twill woven weave structure according to the present invention.
【図６】本発明の（実施例１）〜（実施例３）並びに
（比較例１）〜（比較例４）の各濾過布を濾板に設置し
た図面。FIG. 6 is a drawing in which each filter cloth of (Example 1) to (Example 3) and (Comparative Example 1) to (Comparative Example 4) of the present invention is installed on a filter plate.
【符号の説明】 ２０，２５，３０，４００ ：濾過布 ２１，２６，３１，４０１ ：濾過布の表面（ケーキ
接触面） ２２，２７，３２，４０２ ：濾過布の裏面（ケーキ
非接触面） ２３，２８，３３，４０３ ：経糸 ２４，２９，３４，４０４ ：緯糸 ２１１，２１５ 経糸の長浮き ２１２，２１６ 緯糸の長浮き[Description of Signs] 20, 25, 30, 400: Filter cloth 21, 26, 31, 401: Surface of filter cloth (cake contact surface) 22, 27, 32, 402: Back surface of filter cloth (cake non-contact surface) 23, 28, 33, 403: Warp 24, 29, 34, 404: Weft 211, 215 Long float of warp 212, 216 Long float of weft
Claims (3)
使用される濾過布であって、該濾過布が合成樹脂モノフ
ィラメントから成り、該濾過布の使用時のフィルタープ
レスの濾板面の上下方向の合成樹脂モノフィラメントの
直径が０．２ｍｍ〜０．３ｍｍの範囲で、前記濾板面の
横断方向の合成樹脂モノフィラメントの直径が０．２ｍ
ｍ〜０．４ｍｍの範囲であって、且つ、前記濾板面の上
下方向の合成樹脂モノフィラメントの直径と該合成樹脂
モノフィラメントの２５．４ｍｍ間の糸本数との積が２
８〜３０の範囲で、前記濾板面の横断方向の合成樹脂モ
ノフィラメントの直径と該合成樹脂モノフィラメントの
２５．４ｍｍ間の糸本数との積が６〜２０の範囲であっ
て、且つ、前記濾板面の横断方向の糸が単層の２／２斜
文よこうね織組織で製織後、濾過ケーキ接触面側に平滑
化加工が施され、且つ、濾過ケーキ接触面から濾過ケー
キ非接触面に向けてのフラジール形法による１２５Ｐａ
加圧空気の通気度が６０ｃｍ3／ｃｍ2・min.〜６００ｃ
ｍ3／ｃｍ2・min.の範囲で、バブルポイント法による最
大孔径測定値が１５０μｍ以下であることを特徴とする
フィルタープレス用濾過布。1. A filter cloth used for a single type filter press for performing solid-liquid separation, wherein the filter cloth is made of synthetic resin monofilament, and the filter cloth is used in a vertical direction on a filter plate surface of the filter press when the filter cloth is used. When the diameter of the synthetic resin monofilament is in the range of 0.2 mm to 0.3 mm, the diameter of the synthetic resin monofilament in the cross direction of the filter plate surface is 0.2 m.
m to 0.4 mm, and the product of the diameter of the synthetic resin monofilament in the vertical direction of the filter plate surface and the number of yarns of the synthetic resin monofilament between 25.4 mm is 2
In a range of 8 to 30, a product of a diameter of the synthetic resin monofilament in a transverse direction of the filter plate surface and a number of yarns of the synthetic resin monofilament between 25.4 mm is in a range of 6 to 20; After weaving the yarn in the transverse direction of the plate surface in a single-layer 2/2 oblique weave weave structure, the filter cake contact surface side is smoothed, and the filter cake contact surface to the filter cake non-contact surface. 125Pa by the Frazier method toward
The air permeability of the pressurized air is 60cm 3 / cm 2 · min.
A filter cloth for a filter press, wherein a maximum pore diameter measured by a bubble point method is 150 μm or less in a range of m 3 / cm 2 · min.
２正斜文よこうね織、又は、２／２破れ斜文よこうね
織、又は、２／２杉綾よこうね織のいずれかであること
を特徴とする請求項１記載のフィルタープレス用濾過
布。2. The 2/2 oblique weave woven texture is 2 /
2. The filter press according to claim 1, which is any one of 2 regular oblique weaving weaves, 2/2 tear oblique weaving weaving, and 2/2 cedar twill weaving. Filter cloth.
ッジに薬剤を注入しないで該濃縮スラッジの固液分離を
行う単式フィルタープレスに使用される濾過布であっ
て、前記合成樹脂モノフィラメントが、６ナイロンおよ
び６６ナイロンの少なくとも一方から成るナイロン製モ
ノフィラメントであることを特徴とする請求項１〜２い
ずれか記載のフィルタープレス用濾過布。3. The filter cloth used in a single filter press for performing solid-liquid separation of a concentrated sludge without injecting a chemical into a suspended sludge of a water purification facility, wherein the synthetic resin monofilament is used. The filter cloth for filter press according to any one of claims 1 to 2, wherein the filter cloth is a nylon monofilament comprising at least one of nylon, nylon 6 and nylon 66.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000136227A JP3640594B2 (en) | 2000-05-09 | 2000-05-09 | Filter cloth for filter press |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000136227A JP3640594B2 (en) | 2000-05-09 | 2000-05-09 | Filter cloth for filter press |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001314712A true JP2001314712A (en) | 2001-11-13 |
| JP3640594B2 JP3640594B2 (en) | 2005-04-20 |
Family
ID=18644206
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000136227A Expired - Fee Related JP3640594B2 (en) | 2000-05-09 | 2000-05-09 | Filter cloth for filter press |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3640594B2 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100809624B1 (en) | 2007-02-02 | 2008-03-05 | (주)동일캔바스엔지니어링 | Filter cloth for high pressure type belt press |
| US7578924B1 (en) * | 2004-07-29 | 2009-08-25 | Pacesetter, Inc. | Process for producing high etch gains for electrolytic capacitor manufacturing |
| CN104452026A (en) * | 2013-09-18 | 2015-03-25 | 辽宁博联过滤有限公司 | Machine-woven industrial filter cloth of covered yarns and production and application thereof |
| US10072349B2 (en) | 2016-01-05 | 2018-09-11 | Pacesetter, Inc. | Etch solutions having bis(perfluoroalkylsulfonyl)imides, and use thereof to form anode foils with increased capacitance |
| US10240249B2 (en) | 2016-12-02 | 2019-03-26 | Pacesetter, Inc. | Use of nonafluorobutanesulfonic acid in a low pH etch solution to increase aluminum foil capacitance |
| US10309033B2 (en) | 2016-12-02 | 2019-06-04 | Pacesetter, Inc. | Process additives to reduce etch resist undercutting in the manufacture of anode foils |
| US10422050B2 (en) | 2016-12-02 | 2019-09-24 | Pacesetter, Inc. | Process for using persulfate in a low pH etch solution to increase aluminum foil capacitance |
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2000
- 2000-05-09 JP JP2000136227A patent/JP3640594B2/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7578924B1 (en) * | 2004-07-29 | 2009-08-25 | Pacesetter, Inc. | Process for producing high etch gains for electrolytic capacitor manufacturing |
| US8038866B2 (en) | 2004-07-29 | 2011-10-18 | Pacesetter, Inc. | Process for producing high etch gains for electrolytic capacitor manufacturing |
| US8871358B2 (en) | 2004-07-29 | 2014-10-28 | Pacesetter, Inc. | Process for producing high etch gains for electrolytic capacitor manufacturing |
| KR100809624B1 (en) | 2007-02-02 | 2008-03-05 | (주)동일캔바스엔지니어링 | Filter cloth for high pressure type belt press |
| CN104452026A (en) * | 2013-09-18 | 2015-03-25 | 辽宁博联过滤有限公司 | Machine-woven industrial filter cloth of covered yarns and production and application thereof |
| US10072349B2 (en) | 2016-01-05 | 2018-09-11 | Pacesetter, Inc. | Etch solutions having bis(perfluoroalkylsulfonyl)imides, and use thereof to form anode foils with increased capacitance |
| US10604862B2 (en) | 2016-01-05 | 2020-03-31 | Pacesetter, Inc. | Etch solutions having bis(perfluoroalkylsulfonyl)imides, and use thereof to form anode foils with increased capacitance |
| US10240249B2 (en) | 2016-12-02 | 2019-03-26 | Pacesetter, Inc. | Use of nonafluorobutanesulfonic acid in a low pH etch solution to increase aluminum foil capacitance |
| US10309033B2 (en) | 2016-12-02 | 2019-06-04 | Pacesetter, Inc. | Process additives to reduce etch resist undercutting in the manufacture of anode foils |
| US10422050B2 (en) | 2016-12-02 | 2019-09-24 | Pacesetter, Inc. | Process for using persulfate in a low pH etch solution to increase aluminum foil capacitance |
| US11230794B2 (en) | 2016-12-02 | 2022-01-25 | Pacesetter, Inc. | Use of nonafluorobutanesulfonic acid in a low PH etch solution to increase aluminum foil capacitance |
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| Publication number | Publication date |
|---|---|
| JP3640594B2 (en) | 2005-04-20 |
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