JP2005138064A - Filter and filter bag used for the same - Google Patents

Filter and filter bag used for the same Download PDF

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JP2005138064A
JP2005138064A JP2003379341A JP2003379341A JP2005138064A JP 2005138064 A JP2005138064 A JP 2005138064A JP 2003379341 A JP2003379341 A JP 2003379341A JP 2003379341 A JP2003379341 A JP 2003379341A JP 2005138064 A JP2005138064 A JP 2005138064A
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filtration
bag
filter
tank
opening
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Setsu Nakamura
節 仲村
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Mitaka Kogyosho KK
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Mitaka Kogyosho KK
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a filter in which a detachment and attachment of a filter bag is easy and a filtration area can be increased to a capacity of a filter space. <P>SOLUTION: The filter bag 40 is made of a filter cloth (a) vertically longer than the filter space 11, and comprises an opening portion 43 held at an upper portion of the filter space 11, a cylindrical outer peripheral filter element 41 opposed against an inner peripheral surface of a filter tank 1 at a lower portion of the opening portion 43, and a substantially concentric annular filter element 42 folded up and down two or more times inwardly from an lower end of the outer peripheral filter element 41 and standing up from an inner bottom surface of the filter tank 1 in an indeterminate form. The filter bag 40 composed of the long filter cloth (a) becomes easily detachable from the filter space 11, at the same time a raw liquid introduced in the filter bag 40 is filtered also at the annular filter element 42, and the filtrate filtered out is guided to the outside of the filter tank 1 to realize a broader filtration area than before. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、メッキ液や工作機械の研削液、放電加工液、食料品油等の汚濁液を正常にする濾過処理や、原液中の分散物質を分別回収するための濾過処理に用いられる濾過装置に関する。   The present invention relates to a filtration apparatus used for a filtration process for normalizing a contaminated liquid such as a plating liquid, a grinding liquid for machine tools, an electric discharge machining liquid, and food oil, and a filtration process for separating and recovering dispersed substances in a stock solution. About.

濾材を用いてメッキ液や工作機械の研削液等の原液を清浄にしたり、脱水したりする濾過装置は種々提案されている。こうした濾過装置の多くは、内部に濾過空間が形成された筒状の濾過タンクと、上部に開口を有し、前記濾過空間に着脱可能に装着される濾過袋とを備える。   Various filtering devices have been proposed that use a filter medium to clean or dehydrate a stock solution such as a plating solution or a grinding fluid for a machine tool. Many of such filtration devices include a cylindrical filtration tank having a filtration space formed therein, and a filtration bag having an opening at the top and detachably attached to the filtration space.

一般的な濾過装置の構成を、図９を用いて簡単に説明する。濾過タンク１は、その上部に供給管路８が接続され、下部に排出管路１２が接続されている。そして、供給管路８側に配設された、図示しない送水ポンプの働きにより、供給管路８から濾過タンク１の濾過空間１１に濾過処理する原液を流入させ、排出管路１２から排出するようになっている。そして、濾過袋６０は、袋状の濾布ａからなり、上部の開口部６１を濾過空間１１の上部に着脱可能に保持される。そして、濾過袋６０の装着状態にあっては、濾過空間１１は、濾過袋６０の濾布ａにより、供給管路８側と排出管路１２側とに区画されることとなり、供給管路８から流入した原液は、濾過袋６０内に流入し、濾過袋６０を構成する濾布ａにより濾過される。そして、濾布ａを透過した濾過液は排出管路１２から濾過タンク１外へ導出され、原液に含まれた分散物質は、濾布ａに濾し取られて濾過物質として濾過袋６０内に堆積することとなる。ここで、濾過タンク１の内周面、内底面と濾過袋６０との間には、濾過液が排出管路１２まで通水する通水領域１６を保持する多孔性の通水スペーサ１９が設けられており、濾過袋６０の開口部６１を除く略全面で原液の濾過が行われるようになっている。   The configuration of a general filtration device will be briefly described with reference to FIG. The filtration tank 1 has a supply pipe 8 connected to the upper part thereof and a discharge pipe 12 connected to the lower part thereof. Then, by the action of a water pump (not shown) disposed on the supply line 8 side, the stock solution to be filtered is introduced from the supply line 8 into the filtration space 11 of the filtration tank 1 and discharged from the discharge line 12. It has become. The filtration bag 60 is made of a bag-like filter cloth a, and the upper opening 61 is detachably held on the upper part of the filtration space 11. When the filter bag 60 is attached, the filtration space 11 is divided into the supply pipe line 8 side and the discharge pipe line 12 side by the filter cloth a of the filter bag 60. The stock solution that has flowed in from the air flows into the filter bag 60 and is filtered by the filter cloth a constituting the filter bag 60. And the filtrate which permeate | transmitted the filter cloth a is derived | led-out from the discharge pipe 12 out of the filtration tank 1, and the dispersoid contained in the undiluted | stock solution is filtered by the filter cloth a, and accumulates in the filter bag 60 as a filter substance. Will be. Here, between the inner peripheral surface and inner bottom surface of the filtration tank 1 and the filtration bag 60, a porous water-passing spacer 19 that holds a water-passing region 16 through which the filtrate flows to the discharge pipe 12 is provided. The undiluted solution is filtered over substantially the entire surface excluding the opening 61 of the filter bag 60.

また、こうした濾過装置の濾過処理では、濾過袋６０の濾布ａに泥状の濾過物質が付着して、濾布ａが目詰まりして、濾過圧が上昇することにより、濾過速度が次第に低下していく。このため濾過処理を行うのに不適当な水準まで濾過速度が低下したら、原液に替えてエア管路９から空気を濾過袋６０内に注入して、濾過袋６０から水分を除去し、濾過袋６０に堆積した濾過物質を固形状のケークとする脱水処理を行う、次いで、開放した濾過タンク１から濾過袋６０を取り出し、濾過袋６０内に付着したケークを回収するケーク回収作業を行う。そして、ケークを除去した濾過袋６０、若しくは新しい濾過袋６０を濾過タンク１に再装着して濾過処理を再開する。   Moreover, in the filtration process of such a filtration apparatus, the filtration speed | rate falls gradually because a muddy filtration substance adheres to the filter cloth a of the filter bag 60, the filter cloth a is clogged, and the filtration pressure rises. I will do it. For this reason, when the filtration speed is lowered to a level inappropriate for the filtration treatment, air is injected into the filter bag 60 from the air line 9 instead of the stock solution to remove moisture from the filter bag 60, and the filter bag. A dehydration process is performed in which the filter material deposited on the solid filter 60 is used as a solid cake. Next, a cake collection operation is performed in which the filter bag 60 is taken out from the opened filter tank 1 and the cake adhered to the filter bag 60 is collected. Then, the filtration bag 60 from which the cake has been removed or a new filtration bag 60 is reattached to the filtration tank 1 and the filtration process is resumed.

ここで、上述のような濾過装置の構成では、濾過袋６０は濾過空間１１と同程度の大きさで、筒状の濾過タンク１の内周面と内底面に対向するだけのシンプルな形状であり、濾過空間１１の容積に対する濾過面積が小さいため、濾過速度が遅く、濾過処理に時間がかかると共に、目詰まりし易く、一度に回収できるケーク回収量（以下、単にケーク回収量と記す）も少ないため、ケーク回収作業も頻繁に行わなくてはならないという問題点があった。   Here, in the configuration of the filtration device as described above, the filtration bag 60 has the same size as the filtration space 11 and has a simple shape that only faces the inner peripheral surface and the inner bottom surface of the tubular filtration tank 1. Yes, since the filtration area with respect to the volume of the filtration space 11 is small, the filtration rate is slow, the filtration process takes time, the cake is easily clogged, and the amount of cake recovered (hereinafter simply referred to as cake recovered amount) is also available. There was a problem that the cake collection work had to be done frequently because there were few.

そして、こうした問題を解決する構成として、発明者は以前に特許文献１に示す濾過装置を提案した。かかる構成では、濾過タンクの濾過空間に、通水孔が形成された環状通水塔なる仕切り部材を配設することにより濾過空間を内外に区画する。そして、従来の濾過袋よりも濾布面積の広い濾過袋を該環状通水塔の内外に被着するようにして装着したものである。かかる構成にあっては、濾過処理において、濾過タンクの内周面や内底面と対向する部分だけでなく、環状通水塔に被着した部分においても濾過が行われ、濾過面積が拡大されることとなる。   And as a structure which solves such a problem, the inventor proposed the filtration apparatus shown to patent document 1 before. In such a configuration, the filtration space is divided into the inside and the outside by disposing a partition member, which is an annular water tower having a water passage hole, in the filtration space of the filtration tank. And the filter bag whose filter cloth area is wider than the conventional filter bag is attached so that it may adhere to the inside and outside of this annular water tower. In such a configuration, in the filtration process, filtration is performed not only on the portion facing the inner peripheral surface and inner bottom surface of the filtration tank but also on the portion attached to the annular water tower, and the filtration area is expanded. It becomes.

特開２００１−１４９７０６号公報JP 2001-149706 A

しかし、上述の環状通水塔を設けた構成のように、濾過空間を通水性の仕切り部材により区画した構成は幾つかの問題を抱えていた。まず、かかる構成では、濾過袋の装着作業において、濾過袋を、濾過タンク内面の通水スペーサおよび仕切り部材の全面に被着するという煩雑な作業を行う必要があった。なぜなら、仕切り部材のない濾過空間に、シンプルな形状の濾過袋を備えた構成にあっては、装着時に濾過袋と濾過タンク内の通水スペーサの間に間隙が設けられていても注入された原液の液圧により間隙は自然解消されるが、仕切り部材を設けた構成では濾過空間が複雑に区画されるため、濾過袋と仕切り部材との間に生じている間隙は原液の液圧によっても解消され難く、濾過処理の際に、原液の液圧が濾過袋に直接かかり濾布が破損する危険性があるからである。また、かかる装着作業は、濾過空間をより複雑に区画して濾過面積を拡大させるほど困難となるため、通常の大きさの濾過タンク（径３０〜５０ｃｍ）では、単一のシンプルな濾過袋を用いた構成に比して、濾過面積を３倍程度まで向上させるのが限界であった。さらに、環状通水塔といった仕切り部材の構造も複雑であり、製造費用も嵩むため、コスト面での実用性も欠いていた。   However, the configuration in which the filtration space is partitioned by a water-soluble partition member as in the configuration in which the annular water tower is provided has several problems. First, in such a configuration, in the mounting operation of the filtration bag, it is necessary to perform a complicated operation of attaching the filtration bag to the entire surface of the water passage spacer and the partition member on the inner surface of the filtration tank. This is because, in a configuration provided with a filtration bag with a simple shape in a filtration space without a partition member, it was injected even when a gap was provided between the filtration bag and the water passage spacer in the filtration tank when installed. The gap is naturally eliminated by the liquid pressure of the stock solution, but in the configuration provided with the partition member, the filtration space is complicatedly divided, so the gap formed between the filtration bag and the partition member is also caused by the liquid pressure of the stock solution. This is because it is difficult to eliminate, and there is a risk of the filter cloth being damaged due to the liquid pressure of the undiluted solution being directly applied to the filter bag during the filtration process. In addition, such a mounting operation becomes more difficult as the filtration space is more complicatedly divided and the filtration area is enlarged. Therefore, in a normal size filtration tank (diameter 30 to 50 cm), a single simple filtration bag is used. Compared to the configuration used, it was the limit to improve the filtration area up to about 3 times. Furthermore, the structure of the partition member such as the annular water tower is complicated and the manufacturing cost increases, so that the practicality in terms of cost is lacking.

本発明は、かかる現状に鑑みてなされたものであり、着脱が容易で、濾過面積のさらなる拡大が可能な濾過装置及び該濾過装置に用いる濾過袋の提供を目的とする。   The present invention has been made in view of the present situation, and an object of the present invention is to provide a filtration device that can be easily attached and detached and can further increase the filtration area, and a filtration bag used in the filtration device.

本発明は、内部に濾過空間が形成された筒状の濾過タンクと、該濾過タンクの上部に接続される原液の供給管路と、濾過タンクの下部に接続される濾過液の排出管路と、上端に開口を有し、濾過空間に着脱可能に装着される濾過袋とを備え、供給管路から濾過袋内へ導入された原液を濾過袋により濾過し、濾過袋外に透過した濾過液を排出管路から濾過タンク外へ導出する濾過装置にあって、濾過袋は、濾過空間よりも上下に長尺な濾布で構成され、濾過空間の上部に保持される開口部と、該開口部の下方で濾過タンクの内周面と対向する筒状の外周濾過部と、外周濾過部の下端から内方に複数回上下に折り返されて、濾過タンクの内底面から不定形に起立するほぼ同心状の環状濾過部とを備えてなり、濾過袋内に導入した原液を、外周濾過部と環状濾過部とにより濾過し、透過した濾過液を排出管路から導出することを特徴とする濾過装置である。   The present invention includes a cylindrical filtration tank having a filtration space formed therein, a supply line for a concentrate connected to an upper part of the filtration tank, and a discharge pipe for a filtrate connected to a lower part of the filtration tank. A filtration bag having an opening at the upper end and detachably attached to the filtration space, and filtering the stock solution introduced into the filtration bag from the supply pipe line through the filtration bag and permeating out of the filtration bag The filtration bag is formed of a filter cloth that is longer than the filtration space and is held at the upper part of the filtration space, and the opening. A cylindrical outer peripheral filtration part facing the inner peripheral surface of the filtration tank below the part, and folded up and down several times inward from the lower end of the outer peripheral filtration part to stand up indefinitely from the inner bottom surface of the filtration tank Concentric annular filtration part, and the stock solution introduced into the filtration bag And filtered through the annular filtration unit, a filtration device, characterized by deriving the transmitted filtrate from the discharge conduit.

かかる構成にあっては、濾過袋は、上端の開口部と、該開口部の下方に連続する筒状の外周濾過部と、外周濾過部の下端から内方に複数回上下に折り返されてなるほぼ同心状の環状濾過部とを備え、該開口部を濾過タンクの濾過空間の上部に保持されることにより、着脱可能に装着される。ここで、濾過タンクの濾過空間は環状通水塔などの仕切り部材により区画されないため、濾過袋の装着状態にあっては、外周濾過部は濾過タンクの内周面と対向すると共に、環状濾過部は、仕切り部材に被着することなく濾過タンクの内底面から不定形に起立した状態となる。このため、本発明にかかる濾過袋は、仕切り部材を設けた構成のように、濾過袋を仕切り部材などに被着させる必要がないから、濾過袋が、従来構成より広い濾布面積を有する長尺な濾布からなるものであっても、濾過タンクに容易に装着可能となっている。   In such a configuration, the filtration bag is folded up and down a plurality of times inwardly from the lower end of the outer peripheral filtration part and the cylindrical outer peripheral filtration part continuous below the opening part. A substantially concentric annular filtration part, and the opening is held in the upper part of the filtration space of the filtration tank so as to be detachably mounted. Here, since the filtration space of the filtration tank is not partitioned by a partition member such as an annular water tower, the outer filtration part faces the inner circumferential surface of the filtration tank when the filtration bag is attached, and the annular filtration part is And it will be in the state which stood up indefinitely from the inner bottom face of the filtration tank, without adhering to a partition member. For this reason, the filter bag according to the present invention does not require the filter bag to be attached to the partition member or the like unlike the configuration in which the partition member is provided. Therefore, the filter bag has a wider filter cloth area than the conventional configuration. Even if it consists of a long filter cloth, it can be easily attached to the filtration tank.

そして、本発明にかかる濾過袋は、従来構成より上下に長大な濾布を、複数上下方向に折り返し、上下方向に伸びる略同心状の環状濾過部を形成したものであるから、濾過処理時においては、供給管路から導入された原液が、環状濾過部の濾布により形成された略同心状の間隙の、隅々にまで滞りなく供給されることとなる。そして、原液の液圧により、外周濾過部は濾過タンク内周面側に設けられた通水スペーサに圧接され、外周濾過部内方の環状濾過部は、濾過袋外側面を隣接する濾布と相互に貼りつくようにして重なることとなる。   And, the filtration bag according to the present invention is formed by folding a plurality of filter cloths that are longer than the conventional structure in the vertical direction and forming a substantially concentric annular filtration part extending in the vertical direction. In this case, the stock solution introduced from the supply pipe is supplied to the corners of the substantially concentric gap formed by the filter cloth of the annular filtration part without any delay. Then, the outer peripheral filtration part is pressed into contact with the water flow spacer provided on the inner peripheral surface side of the filtration tank by the liquid pressure of the stock solution, and the annular filtration part inside the outer peripheral filtration part is mutually connected to the filter cloth adjacent to the filter bag. It will overlap as if sticking to.

ここで、従来では、こうして重なった二枚の濾布の間には、濾過液が通る通水領域が形成されないため、かかる部分の濾布では、ほとんど濾過は行われないと考えられていたが、発明者は、重なった濾布は整一に密着するわけではなく、いたるところに大小多数の皺が生じた状態で貼り付いており、この皺の内部が濾過液を排出管路に導く通水領域として作用し得ることを発見した。そして、かかる作用を生かしうる濾過袋の形状について鋭意検討を行った結果、本発明に至ったものである。   Here, conventionally, since the water passing region through which the filtrate passes is not formed between the two filter cloths overlapped in this way, it was thought that almost no filtration was performed in the filter cloths of such parts. The inventor has not adhered the filter cloths that are overlapped in a uniform manner, but is stuck in a state where large and small folds are generated everywhere, and the inside of the folds allows the filtrate to pass through to the discharge pipe. It has been discovered that it can act as a water area. And as a result of earnestly examining about the shape of the filtration bag which can make use of this effect | action, it came to this invention.

すなわち、本発明にかかる濾過袋は、従来構成より上下に長大な濾布を、複数上下方向に折り返し、供給管路から導入された原液が、濾過袋の隅々にまで供給可能な安定形状としたものであるから、濾過処理時に、開口部を除く濾過袋の略全面で濾過が行われることとなる。そして、上述したように、本発明は、従来の濾過袋よりも広い濾布面積を有する濾過袋を簡単に装着可能であるから、従来よりもさらに広い濾過面積を実現可能となっている。   That is, the filter bag according to the present invention has a stable shape capable of supplying the stock solution introduced from the supply pipe to every corner of the filter bag by folding back a plurality of filter cloths that are longer than the conventional configuration in the vertical direction. Therefore, during the filtration process, filtration is performed on substantially the entire surface of the filtration bag excluding the opening. And as above-mentioned, since the filter bag which has a filter cloth area wider than the conventional filter bag can be easily mounted | worn with this invention, the still larger filter area is realizable than before.

より具体的には、上述したように、前記環状通水塔を設けた構成を通常の大きさの濾過タンクに適用した場合、シンプルな袋形状の濾過袋を備えた濾過装置の、３倍程度の濾過面積拡大が限界であったが、本発明にあっては、濾布を複数折り返し、環状濾過部を多数重ねることにより、約１０倍までの濾過面積の拡大が可能となっている。なお、環状濾過部の濾布は貼り付ように重なるため、通水スペーサ等により形成された通水領域と対向する部分の濾布に比べて、単位面積当たりの濾過速度は若干減少するが、かかる減少率は、拡大し得る濾過面積の拡大率に比べて低いものであり、従来構成に比べ、充分量の濾過速度とケーク回収量の向上が可能である。   More specifically, as described above, when the structure provided with the annular water tower is applied to a normal-sized filtration tank, it is about three times as large as a filtration device having a simple bag-shaped filtration bag. Although the expansion of the filtration area was the limit, in the present invention, the filtration area can be increased up to about 10 times by folding a plurality of filter cloths and stacking a large number of annular filtration parts. In addition, since the filter cloth of the annular filtration portion overlaps so as to stick, the filtration rate per unit area is slightly reduced as compared with the filter cloth of the portion facing the water flow area formed by the water flow spacer or the like, Such a reduction rate is lower than the enlargement rate of the filtration area that can be expanded, and a sufficient amount of filtration speed and cake recovery amount can be improved as compared with the conventional configuration.

また、本発明の濾過袋は、濾布を上下に折り返してなる安定形状であるため、ケーク回収作業において、その折畳み構造を伸展することなく濾過タンク外に取り出すことが可能である。また、環状濾過部は上下方向に沿って形成されているため、取り出した濾過袋を逆向きにして揺するだけで、外周濾過部および環状濾過部にこびりついたケークを開口部から排出させることができる。さらに、ケークを回収した後も、そのまま濾過タンクに収容し、その開口部を固定するだけで容易に再装着が可能である。   Further, since the filter bag of the present invention has a stable shape formed by folding the filter cloth up and down, it can be taken out of the filter tank without extending the folded structure in the cake collecting operation. Moreover, since the annular filtration part is formed along the up-down direction, the cake sticking to the outer peripheral filtration part and the annular filtration part can be discharged from the opening only by shaking the taken out filter bag in the reverse direction. . Further, even after the cake is collected, it can be easily mounted again by simply storing it in the filtration tank and fixing the opening.

そして、かかる濾過袋の形状は、濾過空間はよりも長尺な袋状に成形された濾布を、上下に折り返すことにより形成できる。かかる折り返し作業は手作業で容易に実行可能であり、また、この折畳み構造は三次元的に安定で、特に縫着や接着などの補強手段を要しないため、低廉に製造可能である。もちろん、濾過袋に堆積するケークが非常に重く、ケーク回収作業で、その折り返し構造が崩れる可能性が大きい場合には、接着や縫着などにより補強することも可能であり、かかる構成も本発明に含めるものとする。   And the shape of this filter bag can be formed by folding up the filter cloth formed into the bag shape longer than the filtration space up and down. Such folding work can be easily performed manually, and the folding structure is three-dimensionally stable and does not require any reinforcing means such as sewing or adhesion, and can be manufactured at low cost. Of course, if the cake deposited on the filter bag is very heavy and there is a high possibility that the folded structure will collapse in the cake collection operation, it can be reinforced by bonding or sewing, and such a configuration is also included in the present invention. To be included.

また、濾過袋が、濾過空間よりも上下に長尺な濾布で構成され、濾過空間の上部に保持される開口部と、水平方向に折り返されてなる環状の襞が上下方向に複数連続し、かつ該開口部の下方で濾過タンクの内周面と対向する襞状濾過部とを備えてなり、濾過袋内に導入した原液を襞状濾過部により濾過し、透過した濾過液を排出管路から導出するようにした構成も提案される。   In addition, the filtration bag is made of a filter cloth that is longer than the filtration space, and an opening that is held at the top of the filtration space and a plurality of annular folds that are folded back in the horizontal direction are continuous in the vertical direction. And a bowl-shaped filtration part facing the inner peripheral surface of the filtration tank below the opening, and the stock solution introduced into the filter bag is filtered by the bowl-shaped filtration part, and the permeated filtrate is discharged into the discharge pipe. A configuration derived from the road is also proposed.

かかる構成では、濾過袋は、その側面を水平方向に複数折り返されて、複数の環状襞が上下方向に連続する襞状濾過部が形成され、襞状濾過部の上方の開口部を濾過タンクの濾過空間の上部に保持されて、着脱可能に装着される。この装着状態にあっては、襞状濾過部は、その外周部分を濾過タンクの内周面と対向すると共に、内向きに折り返された複数の環状の襞を濾過空間の内方に突出させる。ここで、本構成にあっても、濾過タンクの濾過空間は環状通水塔などの仕切り部材により区画されず、濾過袋を濾過空間に被着させる必要がないから、襞状濾過部が、多数の襞を有する蛇腹状のものであっても濾過タンク内に装着可能であり、濾過空間の容量に対して、濾布面積の広い濾過袋を装着できる。   In such a configuration, the side surface of the filter bag is folded back in the horizontal direction to form a bowl-shaped filtration section in which a plurality of annular baskets are continuous in the vertical direction, and the opening above the bowl-shaped filtration section is formed in the filter tank. It is held in the upper part of the filtration space and is detachably mounted. In this mounted state, the bowl-shaped filter portion has its outer peripheral portion opposed to the inner peripheral surface of the filtration tank, and projects a plurality of annular ridges folded inward into the filtration space. Here, even in this configuration, the filtration space of the filtration tank is not partitioned by a partition member such as an annular water tower, and it is not necessary to attach the filtration bag to the filtration space. Even a bellows having a ridge can be mounted in the filtration tank, and a filter bag having a large filter cloth area can be mounted with respect to the capacity of the filtration space.

かかる濾過装置において、濾過処理を開始すると、供給管路からの原液は、濾過袋内の中央を通り、側部に形成された襞状濾過部の隅々にまで供給される。そして、原液の液圧により、襞状濾過部は、その外周部分を濾過タンク内周面側に圧接すると共に、内方に折り返された襞部分は濾過袋外側面を隣接する濾布と相互に貼り付くように重なることとなる。ここで、この当接した襞状濾過部の濾布の間には、上記環状濾過部と同様に多数の皺が生じることとなり、透過した濾過液を、該皺の内部領域を介して濾過タンク内周面側に導出することにより、襞状濾過部の略全域を介して濾過が行われる。   In such a filtration apparatus, when the filtration process is started, the stock solution from the supply pipe passes through the center in the filtration bag and is supplied to every corner of the bowl-shaped filtration part formed on the side part. And by the liquid pressure of the undiluted solution, the bowl-shaped filtration part presses the outer peripheral part against the inner peripheral surface side of the filtration tank, and the bag part folded inward is mutually connected to the adjacent filter cloth on the outer side of the filter bag. It will overlap like sticking. Here, a large number of ridges are formed between the filter cloths of the abutted bowl-shaped filtration section, like the annular filtration section, and the permeated filtrate is filtered through the inner region of the bowl. By conducting to the inner peripheral surface side, filtration is performed through substantially the entire area of the bowl-shaped filtration part.

このように、本構成の濾過装置にあっては、濾過処理時には、原液が濾過袋内の全域に行き渡ることとなり、開口部を除く濾過袋の略全面で濾過が行われる。そして、かかる形状の濾過袋を備えた濾過装置にあっても、環状通水塔を設けた構成のように、濾過袋の装着時に濾布を被着させる必要がないため、襞を何重にも形成した形状の濾過袋でも簡単に装着することが可能であり、従来よりも濾過面積を拡大することが可能となっている。   As described above, in the filtration device of this configuration, during the filtration process, the stock solution spreads over the entire area of the filtration bag, and filtration is performed on substantially the entire surface of the filtration bag excluding the opening. And even if it is in the filtration apparatus provided with the filtration bag of this shape, since it is not necessary to attach a filter cloth at the time of wearing of a filter bag like the composition which provided the annular water passage tower, the basket is piled in layers. Even a filter bag having a formed shape can be easily mounted, and the filtration area can be increased as compared with the conventional case.

また、かかる濾過袋の形状は、長尺な袋状に成形した濾布を、濾過タンクへの装着前に、手作業により折り畳むことにより形成可能であるが、濾過タンクの装着時により容易に形成することができる。すなわち、襞のない長尺な袋状濾布を、底部から濾過タンク内に押し込んでいけば、濾過袋の側面が水平方向に折り返されて、環状の襞が複数形成されていき、本発明に係る襞状濾過部を形成することができる。   In addition, the shape of the filter bag can be formed by manually folding the filter cloth formed into a long bag shape before mounting the filter tank, but it is easier to form when the filter tank is mounted. can do. In other words, if a long bag-shaped filter cloth without ridges is pushed into the filtration tank from the bottom, the side surface of the filtration bag is folded back in the horizontal direction, and a plurality of annular ridges are formed. Such a bowl-shaped filtration part can be formed.

ここで、上記の襞状濾過部を備える濾過袋にあっては、水平方向の襞が複数形成されており、襞形状を維持したままでは、襞の間に堆積した濾過物質を排出し難いため、ケーク回収作業においては、襞状濾過部を一度伸展させてから、ケークを排出することが望ましい。ここで伸展した濾過袋からケークを簡単に排出可能な構成として、上記濾過装置では、濾過袋の底部に、濾過袋内に堆積したケークを排出する排出孔と、該排出孔を開閉する開閉手段とが設けることが提案される。かかる構成では、底部の開閉手段により排出孔を閉じた状態で、濾過袋を濾過タンクに装着して濾過を行う。そして、ケーク回収作業においては、濾過袋を襞状濾過部の襞を上部から伸展させながら濾過タンクから引き出し、これに伴い濾過袋を叩く、揺することにより、濾布に付着したケークを剥落させる。そして、襞状濾過部が完全に伸展して、濾過袋底部に全てのケークが溜まったところで、排出孔を開放し、ケークを取り出すことにより、長尺に伸展した濾過袋を逆さにすることなく、ケークを簡単に回収することができる。ここで排出孔の開閉手段としては、濾過袋の排出孔近傍を締め付ける紐やゴム、樹脂等からなる結束具が挙げられる。また、濾過袋そのものを底部で結ぶようにしても構わない。   Here, in the filtration bag provided with the above-described bowl-shaped filtration unit, a plurality of horizontal bowls are formed, and it is difficult to discharge the filtration material deposited between the bowls while maintaining the bowl shape. In the cake collection operation, it is desirable to extend the bowl-shaped filtration part once and then discharge the cake. As a configuration in which the cake can be easily discharged from the extended filter bag, a discharge hole for discharging the cake accumulated in the filter bag at the bottom of the filter bag, and an opening / closing means for opening and closing the discharge hole. Is proposed to provide. In such a configuration, the filtration bag is attached to the filtration tank and the filtration is performed with the discharge hole closed by the opening / closing means at the bottom. In the cake collecting operation, the filter bag is pulled out from the filter tank while extending the basket of the bowl-shaped filter part from above, and the cake attached to the filter cloth is peeled off by hitting and shaking the filter bag. And when the bowl-shaped filtration part is fully extended and all cakes are collected at the bottom of the filtration bag, the drainage holes are opened and the cake is taken out without inverting the elongated filtration bag. The cake can be easily recovered. Here, as the opening / closing means for the discharge hole, a binding tool made of a string, rubber, resin or the like for tightening the vicinity of the discharge hole of the filter bag can be used. Alternatively, the filter bag itself may be tied at the bottom.

また、本発明の濾過装置の濾過袋を構成する濾布には、従来の濾過装置の濾過袋を構成する濾布と同じ濾材を好適に使用可能である。具体的な濾材としては、紙、樹脂繊維、金属繊維などが挙げられる。また、この濾布は一種類の濾材で構成されていてもよいし、複数種類の濾材を重ねたものでも構わない。   Moreover, the same filter material as the filter cloth which comprises the filter bag of the conventional filter apparatus can be used suitably for the filter cloth which comprises the filter bag of the filter apparatus of this invention. Specific examples of the filter medium include paper, resin fiber, and metal fiber. Moreover, this filter cloth may be comprised with one type of filter medium, and what laminated | stacked multiple types of filter medium may be sufficient as it.

さらに、環状濾過部や襞状濾過部の濾過速度を上昇させる構成として、濾過袋を、濾布よりなる袋状の内側袋部と、該濾布よりも通水性の高い可撓性シートからなり、内側袋部を外側から被覆する外側袋部とで構成することが提案される。かかる構成では、濾過処理の際に、環状濾過部や襞状濾過部といった濾過袋の相互に重なる部分では、内側袋部の濾布の間に、通水性の高い外側袋部が介在することとなり、濾過液が通水容易な領域を形成する。従って、濾過液は、濾布に形成された皺の間を介してだけでなく、外側袋部を介しても排出管路へと導出されることとなる。すなわち、本構成では、外側袋部が、環状濾過部や襞状濾過部の相互に重なる部分にあって、通水領域を形成する可撓性のスペーサとして働くこととなり、該濾過部の単位面積あたりの濾過速度が向上させることができる。なお、外側袋部を構成する可撓性シートには、メッシュシートなどを用いることが望ましい。   Furthermore, as a configuration for increasing the filtration speed of the annular filtration part and the bowl-like filtration part, the filtration bag is composed of a bag-like inner bag part made of a filter cloth and a flexible sheet having a higher water permeability than the filter cloth. It is proposed that the inner bag portion is composed of an outer bag portion covering from the outside. In such a configuration, at the time of the filtration treatment, in the portion where the filtration bags overlap each other such as the annular filtration portion and the bowl-like filtration portion, the outer bag portion having high water permeability is interposed between the filter cloths of the inner bag portion. A region where the filtrate can be easily passed is formed. Therefore, the filtrate is led out to the discharge pipe not only through the space formed in the filter cloth but also through the outer bag portion. That is, in this configuration, the outer bag portion is in a portion where the annular filtration portion and the bowl-like filtration portion overlap each other, and acts as a flexible spacer that forms a water passage region, and the unit area of the filtration portion The per filtration rate can be improved. In addition, it is desirable to use a mesh sheet etc. for the flexible sheet which comprises an outer side bag part.

また、本発明の濾過装置は、着脱可能な濾過袋に特徴を有するものであるから、従来の濾過装置を構成する濾過袋に替えて、本発明の濾過袋を用いることで簡単に実現可能である。また濾過袋は耐久寿命が比較的短く、適宜交換される部品であるため、濾過袋のみの流通形態も考えられる。このため、濾過空間よりも上下に長尺な濾布で構成され、濾過空間の上部に保持される開口部と、該開口部の下方で濾過タンクの内周面と対向する筒状の外周濾過部と、外周濾過部の下端から内方に複数回上下に折り返されて、濾過タンクの内底面から不定形に起立するほぼ同心状の環状濾過部とを備えてなることを特徴とする濾過装置に用いられる濾過袋や、濾過空間よりも上下に長尺な濾布で構成され、その上部に開口を有する共に、その底部に、内部に堆積したケークを排出する排出孔と、該排出孔を開閉する開閉手段が設けられていることを特徴とする濾過装置に装着する濾過袋、また、濾布よりなる袋状の内側袋部と、該濾布よりも通水性の高い可撓性シートからなり、内側袋部を外側から被覆する外側袋部とで構成されている濾過袋についても本発明に含めるものとする。   In addition, since the filtration device of the present invention is characterized by a detachable filtration bag, it can be easily realized by using the filtration bag of the present invention instead of the filtration bag constituting the conventional filtration device. is there. Further, since the filter bag has a relatively short durability life and is a part that is appropriately replaced, a distribution form of only the filter bag is also conceivable. For this reason, it is composed of a filter cloth that is longer than the filtration space and is held in the upper part of the filtration space, and a cylindrical outer peripheral filtration that faces the inner peripheral surface of the filtration tank below the opening. And a substantially concentric annular filtration part that is folded up and down several times inward from the lower end of the outer filtration part and stands up indefinitely from the inner bottom surface of the filtration tank. The filter bag used in the filter, or a filter cloth that is longer than the filtration space, has an opening at the top, a discharge hole for discharging the cake deposited inside, and a discharge hole at the bottom. An opening / closing means for opening and closing is provided with a filtration bag attached to a filtration device, a bag-like inner bag portion made of a filter cloth, and a flexible sheet having a higher water permeability than the filter cloth A filter composed of an outer bag portion covering the inner bag portion from the outside. Also included in the present invention for the bag.

なお、本発明に係る、環状濾過部や襞状濾過部を備える濾過袋は、可撓性を有するものであるから、ここで述べる環状、筒状、同心状、上下方向、水平方向といった記載は、必ずしも厳密である必要はない。従って、本発明にかかる濾過袋は、濾布の変形等により形状が多少変化したものも含めるものである。   In addition, since the filtration bag provided with the annular filtration part and the bowl-shaped filtration part according to the present invention has flexibility, descriptions such as annulus, cylinder, concentricity, vertical direction, and horizontal direction described herein are as follows. , Not necessarily strict. Therefore, the filter bag according to the present invention includes a bag whose shape is slightly changed due to deformation of the filter cloth or the like.

このように、本発明は、濾過袋が、濾過空間よりも上下に長尺な濾布で構成され、濾過空間の上部に保持される開口部と、該開口部の下方で濾過タンクの内周面と対向する筒状の外周濾過部と、外周濾過部の下端から内方に複数回上下に折り返されて、濾過タンクの内底面から不定形に起立するほぼ同心状の環状濾過部とを備えてなり、濾過袋内に導入した原液を、外周濾過部と環状濾過部とにより濾過し、透過した濾過液を排出管路から導出することを特徴とする濾過装置であるから、濾過袋が、濾布を幾重にも重ねた形状であっても容易に装着可能であるため、従来の、環状通水塔のように仕切り部材を設け、濾過空間を区画するようにした構成よりも濾過面積を拡大できる。従って、従来よりも濾過速度を向上させることができ、また、一度に多くのケークを回収することにより、ケーク回収作業の頻度を減らすこともできる。また、この濾過装置は、濾過空間より上下に長尺なもの濾布を袋状に成形し、上下方向に折り返すだけで簡単に作製可能であり、濾過タンクやその他の構成は、従来通りのものを用いることができるため、濾過面積の拡大が低廉に実現可能となっている。さらには、本発明の濾過装置にあっては、濾過袋の折畳み構造を崩すことなく、ケーク回収作業を簡単かつ迅速に行うことができる。   Thus, according to the present invention, the filtration bag is formed of a filter cloth that is longer than the filtration space and has an opening held at the top of the filtration space, and an inner periphery of the filtration tank below the opening. A cylindrical outer perimeter filtration section facing the surface, and a substantially concentric annular filtration section that is folded up and down several times inward from the lower end of the outer perimeter filtration section and stands up indefinitely from the inner bottom surface of the filtration tank. The filtration bag is characterized in that the stock solution introduced into the filtration bag is filtered by the outer peripheral filtration part and the annular filtration part, and the permeated filtrate is led out from the discharge conduit. The filter area can be easily installed even if the filter cloths are stacked in layers. Therefore, the filter area is expanded compared to the conventional configuration in which a partition member is provided like the annular water tower and the filter space is partitioned. it can. Therefore, the filtration rate can be improved as compared with the conventional case, and the frequency of cake collection work can be reduced by collecting many cakes at a time. In addition, this filtration device can be easily made by simply forming a filter cloth that is long above and below the filtration space into a bag shape and folding it back up and down. Therefore, the enlargement of the filtration area can be realized at low cost. Furthermore, in the filtration device of the present invention, the cake collection operation can be performed easily and quickly without breaking the folding structure of the filtration bag.

また、濾過袋が、濾過空間よりも上下に長尺な濾布で構成され、濾過空間の上部に保持される開口部と、水平方向に折り返されてなる環状の襞が上下方向に複数連続し、かつ該開口部の下方で濾過タンクの内周面と対向する襞状濾過部とを備えた濾過装置にあっても、濾過タンク内に仕切り部材を設けた構成よりも、さらに広い濾過面積を簡単かつ低廉に形成可能であるため、従来よりも濾過速度を向上させ、ケーク回収作業の頻度を減らすことができる。   In addition, the filtration bag is made of a filter cloth that is longer than the filtration space, and an opening that is held at the top of the filtration space and a plurality of annular folds that are folded back in the horizontal direction are continuous in the vertical direction. In addition, even in a filtration device having a bowl-shaped filtration part facing the inner peripheral surface of the filtration tank below the opening, a wider filtration area than the configuration in which a partition member is provided in the filtration tank. Since it can be formed easily and inexpensively, the filtration speed can be improved and the frequency of cake collection work can be reduced as compared with the prior art.

そして、濾過袋に襞状濾過部を備える濾過装置にあって、濾過袋の底部に、濾過袋内に堆積したケークを排出する排出孔と、該排出孔を開閉する開閉手段とが設けた場合には、ケーク回収作業において、濾過袋を伸展させて長尺な状態としても、その底部からケークを容易に取り出すことができる。   And in the filtration device provided with the bowl-shaped filtration part in the filtration bag, when the discharge hole for discharging the cake deposited in the filtration bag and the opening / closing means for opening and closing the discharge hole are provided at the bottom of the filtration bag In the cake collecting operation, the cake can be easily taken out from the bottom even if the filter bag is extended to be in a long state.

さらに、濾過袋を、濾布よりなる袋状の内側袋部と、該濾布よりも通水性の高い可撓性シートからなり、内側袋部を外側から被覆する外側袋部とで構成した場合には、濾過袋に備える環状濾過部や襞状濾過部の、相互に重なる部分での通水性が向上し、かかる部分における濾過速度を向上させることができる。   Furthermore, when the filtration bag is composed of a bag-like inner bag portion made of a filter cloth and an outer bag portion made of a flexible sheet having a higher water permeability than the filter cloth and covering the inner bag portion from the outside. The water permeability in the part which mutually overlaps the annular filtration part and the bowl-shaped filtration part with which a filter bag is equipped improves, and the filtration rate in this part can be improved.

本発明の実施形態を、実施例を用いて説明する。   Embodiments of the present invention will be described using examples.

まず、濾過袋４０に環状濾過部４２を形成した第一実施例について説明する。
図１において、濾過タンク１は、容器状のタンク主体２の上部開口３を図１鎖線で示すように支軸５を中心として回動可能な椀形の開閉蓋４で遮蔽してなるものである。この開閉蓋４はその椀形により内部に上部通水領域６が形成される。この開閉蓋４の上部中心には、閉止バルブ７ａにより開閉される原液の供給管路８と、同じく閉止バルブ７ｂにより開閉されるエア管路９が接続される。さらに、その中心から少し外れた位置に、圧力計１０が設けられている。なお、本発明の濾過装置は、この濾過タンク１の外方に、供給管路８から原液を送り出す送水ポンプや、脱水処理のための空気をエア管路９から注入するためのエアポンプ、また、各種バルブの開閉を制御するための操作装置などが取り付けられてなるものであるが、かかる構成については、従来構成と同様のものを利用可能であるため図示を省略する。 First, a first embodiment in which the annular filtration part 42 is formed in the filter bag 40 will be described.
In FIG. 1, a filtration tank 1 is formed by shielding an upper opening 3 of a container-shaped tank main body 2 with a bowl-shaped opening / closing lid 4 that can rotate around a support shaft 5 as shown by a chain line in FIG. is there. The opening / closing lid 4 has an upper water flow area 6 formed therein due to its bowl shape. Connected to the upper center of the opening / closing lid 4 are a supply line 8 for a raw solution that is opened and closed by a closing valve 7a and an air line 9 that is also opened and closed by a closing valve 7b. Furthermore, a pressure gauge 10 is provided at a position slightly deviated from the center. The filtration device of the present invention is a water supply pump for feeding the stock solution from the supply line 8 to the outside of the filtration tank 1, an air pump for injecting air for dehydration from the air line 9, An operation device for controlling the opening and closing of various valves is attached. However, since this configuration can be the same as the conventional configuration, illustration is omitted.

タンク主体２は下方へ僅かに縮径しており、その下底部には、濾過液の排出管路１２が接続される。また、下底部から少し上部の外周部にも、上部脱水用の補助排出管路１３が接続され。相互の排出管路１２，１３は、濾過タンク１内部の濾過空間１１と連通する。また、この補助排出管路１３は閉止バルブ１４を介して排出管路１２と接続される。   The tank main body 2 is slightly reduced in diameter downward, and a filtrate discharge pipe 12 is connected to the bottom of the tank main body 2. Further, an auxiliary discharge pipe 13 for upper dehydration is connected to the outer peripheral part slightly above the lower bottom part. The mutual discharge pipes 12 and 13 communicate with the filtration space 11 inside the filtration tank 1. The auxiliary discharge line 13 is connected to the discharge line 12 through a closing valve 14.

前記タンク主体２の内底面には、後述する濾過袋４０との間に排出管路１２へ濾過液を導出する通水領域１７を形成するための通水スペーサ１９ｂが配設される。また、タンク主体２の内周面にも、後述する濾過袋４０との間に濾過液が流れる通水領域１８を保持するための多孔性の通水スペーサ１９ａが配設される。   On the inner bottom surface of the tank main body 2, a water passage spacer 19 b for forming a water passage region 17 for leading the filtrate to the discharge pipe 12 is provided between the tank main body 2 and a filter bag 40 described later. In addition, a porous water passage spacer 19 a for holding a water passage region 18 through which the filtrate flows is provided between the inner surface of the tank main body 2 and the filtration bag 40 described later.

そして、かかる濾過タンク１の濾過空間１１に、濾過袋４０が着脱可能に装着される。この濾過袋４０は、濾過空間１１よりも上下に長尺な濾布ａからなり、濾過空間１１の上部に嵌着される保持リング２１により固定される上端の開口部と、濾過タンク１の内周面と対向する筒状の外周濾過部４１と、外周濾過部４１の下端から内方に複数回上下に折り返されて、濾過タンク１の内底面から不定形に起立するほぼ同心状の環状濾過部４２とを備えてなるものである。かかる濾過袋４０は本発明の要部にあたるものであり、以下にこの構成を詳細に説明する。   And the filtration bag 40 is attached to the filtration space 11 of this filtration tank 1 so that attachment or detachment is possible. The filter bag 40 is made of a filter cloth a that is longer than the filter space 11 and is fixed to the upper portion of the filter space 11 by a holding ring 21. A cylindrical outer peripheral filtration part 41 facing the peripheral surface, and a substantially concentric annular filtration that is folded up and down several times inward from the lower end of the outer peripheral filtration part 41 and stands up indefinitely from the inner bottom surface of the filtration tank 1 The unit 42 is provided. The filter bag 40 corresponds to a main part of the present invention, and this configuration will be described in detail below.

濾過袋４０は、濾過空間１１よりも上下に長尺なナイロン製の濾布ａにより構成される。この濾布ａは左右、底部の隅を縫着又は接着することにより、濾過空間１１より上下に長尺な袋形状に成形され、そして、この長尺な袋形状のものを、手作業により上下に六回折り返すことにより、図２に示すような、開口部４３と、開口部４３の下方に連続し、かつ外周側に位置する筒形の外周濾過部４１と、外周濾過部４１の下端から内方へ上下に六回折り返されてなる略同心状の環状濾過部４２とを形成する。また、濾過袋４０の中央にあたる底部は下底濾過部４４が形成される。   The filter bag 40 is constituted by a nylon filter cloth a that is longer than the filter space 11 in the vertical direction. This filter cloth a is formed into a bag shape that is long up and down from the filtration space 11 by sewing or bonding the left and right and bottom corners. As shown in FIG. 2, the opening 43, the cylindrical outer filtration part 41 that is continuous below the opening 43 and located on the outer peripheral side, and the lower end of the outer filtration part 41 are used. A substantially concentric annular filtration part 42 is formed which is folded six times inward and downward. In addition, a lower bottom filtration part 44 is formed at the bottom corresponding to the center of the filtration bag 40.

この濾過袋４０は、かかる形状に折り畳むことにより安定するとともに、コンパクトととなり、簡便に取り扱うことが可能となる。そして、この折り畳まれた濾過袋４０を、濾過タンク１の開口３から濾過空間１１に収容し、保持リング２１により開口部４３を濾過空間１１上部に固定されることにより、図１に示したように、濾過タンク１に装着される。これに対して、装着された濾過袋４０は、保持リング２１を外して、濾過袋４０を引き上げることにより、その折畳み構造を崩すことなく取り外される。   The filter bag 40 is stabilized by being folded into such a shape, and becomes compact and can be handled easily. Then, the folded filtration bag 40 is accommodated in the filtration space 11 from the opening 3 of the filtration tank 1, and the opening 43 is fixed to the upper part of the filtration space 11 by the holding ring 21, as shown in FIG. And attached to the filtration tank 1. On the other hand, the attached filter bag 40 is removed without breaking the folding structure by removing the holding ring 21 and pulling up the filter bag 40.

このように、本実施例の濾過袋４０は、濾過空間１１の容積に比して、従来よりも長大な濾布ａで構成され、これを長尺な袋状にしてから内方に折り返すことにより、安定でコンパクトな折畳み構造としたものである。そして、かかる濾過袋４０は、仕切り部材により区画されていない濾過空間１１に装着されるため、濾過袋４０が幾重にも折り返された広い濾布ａにより構成されていても、簡単に着脱することができる。   Thus, the filter bag 40 of the present embodiment is configured with the filter cloth a that is longer than the conventional filter cloth 11 as compared with the volume of the filter space 11, and is folded inward after making it into a long bag shape. Thus, a stable and compact folding structure is obtained. And since this filtration bag 40 is mounted | worn with the filtration space 11 which is not divided by the partition member, even if the filtration bag 40 is comprised with the wide filter cloth a folded back several times, it can attach or detach easily. Can do.

そして、この濾過袋４０をタンク主体２内に装着すると、図１に示すように、濾過袋４０の下底濾過部４４が、濾過タンク１の内底面の通水スペーサ１９ｂと当接し、外周濾過部４１が濾過タンク１の内周面と対向すると共に、外周濾過部４１内方の環状濾過部４２は、濾過タンク１の内底面から不定形に起立する形状で保持される。   When the filter bag 40 is mounted in the tank main body 2, as shown in FIG. 1, the lower bottom filtration part 44 of the filter bag 40 comes into contact with the water passage spacer 19 b on the inner bottom surface of the filtration tank 1, and the outer periphery filtration is performed. While the portion 41 faces the inner peripheral surface of the filtration tank 1, the annular filtration portion 42 inside the outer peripheral filtration portion 41 is held in a shape that rises indefinitely from the inner bottom surface of the filtration tank 1.

また、かかる濾過袋４０の装着状態では、濾過袋４０の外方は、通水スペーサ１９ａ，１９ｂにより保持される通水領域１７，１８を介して、排出管路１２，１３と連通し、一方、濾過袋４０の内方は、濾過空間１１上部の上部通水領域６を介して供給管路８と連通する。すなわち、濾過袋４０の濾布ａにより、濾過空間１１が供給管路８と連通する濾過袋４０内方の領域と、排出管路１２に連通する濾過袋４０外方の領域とに区画される形となっており、供給管路８から導入された原液は、濾過袋４０の濾布ａのいずれかにより濾過されて、透過した濾過液が排出管路１２，１３から排出されるようになっている。   Further, when the filter bag 40 is mounted, the outside of the filter bag 40 communicates with the discharge pipes 12 and 13 through the water flow regions 17 and 18 held by the water flow spacers 19a and 19b. The inner side of the filtration bag 40 communicates with the supply pipe line 8 through the upper water passage region 6 above the filtration space 11. That is, the filter cloth a of the filter bag 40 divides the filtration space 11 into a region inside the filter bag 40 that communicates with the supply pipe line 8 and a region outside the filter bag 40 that communicates with the discharge pipe line 12. The stock solution introduced from the supply line 8 is filtered by one of the filter cloths a of the filter bag 40, and the permeated filtrate is discharged from the discharge lines 12 and 13. ing.

次に、本実施例の濾過装置による一連の濾過処理を説明する。
濾過タンク１内に濾過袋４０を装着して開閉蓋４を遮蔽した状態にあって、閉止バルブ７ａを開放すると、図示しない送水ポンプの働きにより、供給管路８から上部通水領域６内に原液が導入される。そして、原液は、開口部４３から濾過袋４０内に流入し、環状濾過部４２の間に形成された間隙、および環状濾過部４２と外周濾過部４１の間に形成された間隙の、隅々にまで浸入することとなる。 Next, a series of filtration processes by the filtration apparatus of the present embodiment will be described.
When the filter bag 40 is mounted in the filtration tank 1 and the opening / closing lid 4 is shielded, and the closing valve 7a is opened, the water supply pump (not shown) functions to bring the supply line 8 into the upper water flow area 6. Stock solution is introduced. Then, the stock solution flows into the filter bag 40 from the opening 43, and every corner of the gap formed between the annular filtration part 42 and the gap formed between the annular filtration part 42 and the outer peripheral filtration part 41. It will infiltrate up to.

そして、流入した原液の液圧により、濾過袋４０は外方へ膨らみ、外周濾過部４１を濾過タンク１内周面の通水スペーサ１９ａと圧接すると共に、環状濾過部４２は隣接する濾布ａを袋外側で相互に当接させることとなる。ここで、図１，２に示したように、環状濾過部４２は不定形に起立しているものであるから、環状濾過部４２を構成する濾布ａは、流入した原液の圧力により隣接する濾布ａの近接部分と乱雑に重なることとなり、図３に示すように、環状濾過部４２の当接した濾布ａの間には多数の皺ｐが生じることとなる。   Then, due to the liquid pressure of the inflowing stock solution, the filtration bag 40 swells outward, the outer filtration part 41 is brought into pressure contact with the water passage spacer 19a on the inner circumferential surface of the filtration tank 1, and the annular filtration part 42 is adjacent to the filter cloth a. Are brought into contact with each other outside the bag. Here, as shown in FIGS. 1 and 2, since the annular filtration part 42 stands up in an indefinite shape, the filter cloth a constituting the annular filtration part 42 is adjacent by the pressure of the inflowing stock solution. As shown in FIG. 3, a large number of wrinkles p are generated between the filter cloths abutting against the annular filter part 42 as shown in FIG. 3.

そして、図３中の矢印に示すように、濾過袋４０に流入した原液は、外周濾過部４１を透過し、透過した濾過液は、通水スペーサ１９ａにより形成された通水領域１８を通過して、排出管路１２へと伝わると共に、原液は環状濾過部４２も透過し、透過した濾過液は、相互に重なる濾布ａに形成された多数の皺ｐの間を介して、濾過タンク１底部の通水領域１７へと伝わり、排出管路１２から濾過タンク１の外方へ導出される。また、同様に、下底濾過部４４においても濾過が行われ、透過した濾過液は、通水領域１７を介して排出管路１２から導出される。   Then, as shown by the arrows in FIG. 3, the stock solution that has flowed into the filter bag 40 permeates the outer peripheral filtration portion 41, and the permeated filtrate passes through the water flow area 18 formed by the water flow spacer 19a. The filtrate is transmitted to the discharge pipe 12 and the raw solution also passes through the annular filtration portion 42. The filtrate that has passed through the filtration tank 1 passes through a plurality of ridges p formed on the filter cloths a that overlap each other. It is transmitted to the water flow area 17 at the bottom and is led out of the filtration tank 1 from the discharge pipe 12. Similarly, the lower bottom filtration unit 44 performs filtration, and the permeated filtrate is led out from the discharge pipe 12 through the water flow region 17.

このように、本実施例の濾過装置では、濾過袋４０の開口部４３を除く略全面が濾過作用を生じ、何重にも折り畳まれた濾布ａの略全てにおいて濾過が行われることとなる。このため、同素材の濾布ａで形成された折畳み構造のないシンプルな濾過袋を、本実施例の濾過袋４０に替えて用いた場合と比べ、約７倍の濾過面積が実現されており、濾過開始直後の濾過速度、ケーク回収量ともに約４倍にまで向上されている。   Thus, in the filtration device of the present embodiment, almost the entire surface excluding the opening 43 of the filtration bag 40 has a filtration effect, and filtration is performed on almost all of the filter cloth a folded in layers. . For this reason, compared with the case where the simple filter bag without the folding structure formed with the filter cloth a of the same material is used in place of the filter bag 40 of the present embodiment, the filtration area is about 7 times as large. The filtration rate immediately after the start of filtration and the amount of cake recovered are improved to about 4 times.

そして、かかる濾過処理を連続すると、濾過袋４０内に泥状の濾過物質が堆積し、濾過袋４０の所々で目詰まりが起きて、濾過速度が低下する共に、濾過タンク１内の圧力が上昇する、この圧力上昇は圧力計１０により検知され、かかる圧力が所定閾値以上となると、閉止バルブ７ａを遮断し且つ閉止バルブ７ｂを開放して、さらに図示しないエアポンプを作動させ、エア管路９から高圧の空気を濾過タンク１内に供給して脱水処理に移行する。これにより、濾過タンク１内部の原液が空気圧により強制的に排除されるとともに、濾過袋４０の内部に堆積した泥状の濾過物質が絞られ、ケークとなる。   When the filtration process is continued, a muddy filtration material accumulates in the filtration bag 40, and clogging occurs in some parts of the filtration bag 40, the filtration speed decreases, and the pressure in the filtration tank 1 increases. This pressure increase is detected by the pressure gauge 10, and when the pressure exceeds a predetermined threshold value, the closing valve 7a is shut off and the closing valve 7b is opened, and an air pump (not shown) is further operated to High-pressure air is supplied into the filtration tank 1 to proceed to dehydration. As a result, the stock solution inside the filtration tank 1 is forcibly removed by the air pressure, and the muddy filtration material deposited inside the filtration bag 40 is squeezed to form a cake.

この脱水処理を行った後に、閉止バルブ７ｂを遮断して、開閉蓋４を開放し、ケーク回収作業を行う。すなわち、保持リング２１を外し、濾過袋４０を濾過タンク１内から取り出す。そして、取り出した濾過袋４０を、その折畳み構造を崩すことなく、逆さにして、揺する、叩くなどすることにより、濾布ａに付着したほどんどのケークを開口部４３から落下させ、回収する。ケークを回収した後の濾過袋４０の強度に問題がない場合には、再び濾過タンク１内に装着し、濾過処理を続行する。   After performing this dehydration treatment, the closing valve 7b is shut off, the opening / closing lid 4 is opened, and the cake collecting operation is performed. That is, the holding ring 21 is removed, and the filter bag 40 is taken out from the filter tank 1. Then, the taken-out filter bag 40 is inverted, shaken, or struck without breaking the folded structure, so that most cakes attached to the filter cloth a are dropped from the opening 43 and collected. If there is no problem in the strength of the filter bag 40 after collecting the cake, it is mounted in the filter tank 1 again and the filtration process is continued.

このように、本実施例にあっては、濾過袋４０の濾布ａは上下方向に折り畳まれているため、濾過袋４０の折畳み構造を保持したまま、濾過袋４０内のケークを簡単に排出することができる。従って、濾過袋４０が広大な濾布ａにより形成されていても、ケーク回収作業を簡単に行うことができる。また、ケークの回収、再装着に当たってはケークが付着した濾過袋４０内に触れる必要がないため、ケーク回収作業を清潔に行うこともできる。   Thus, in the present embodiment, the filter cloth a of the filter bag 40 is folded in the vertical direction, so that the cake in the filter bag 40 can be easily discharged while the folded structure of the filter bag 40 is maintained. can do. Therefore, even if the filter bag 40 is formed by the vast filter cloth a, the cake collecting operation can be easily performed. Further, when collecting and reattaching the cake, it is not necessary to touch the inside of the filtration bag 40 to which the cake has adhered, so that the cake collecting operation can be performed cleanly.

次に、濾過袋５０に襞状濾過部５１を形成した、第二実施例を説明する。
本実施例では、図４に示すように、濾過袋５０が、その上端の開口部５３を濾過タンク１内の上部に固定されると共に、濾過タンク１の内周面と対向する部分を水平方向に複数折り返されて、複数の環状の襞が上下方向に連続する襞状濾過部５１が形成されている。以下にこの濾過袋５０の構成を詳細に説明する。なお、本実施例の濾過装置は、濾過袋５０以外の、濾過タンク１などの構成は第一実施例と同様の構成であるため、同一符号を付して説明を省略する。 Next, the 2nd Example which formed the bowl-shaped filtration part 51 in the filter bag 50 is described.
In the present embodiment, as shown in FIG. 4, the filter bag 50 has an upper end opening 53 fixed to the upper part of the filtration tank 1, and a portion facing the inner peripheral surface of the filtration tank 1 is horizontally oriented. In this way, a bowl-shaped filtration part 51 is formed in which a plurality of ring-shaped ridges are continuous in the vertical direction. Hereinafter, the configuration of the filter bag 50 will be described in detail. In addition, since the structure of the filtration tank 1 etc. other than the filter bag 50 is a structure similar to a 1st Example, the filtration apparatus of a present Example attaches | subjects the same code | symbol and abbreviate | omits description.

本実施例の濾過袋５０は、第一実施例と同じ一枚の長尺なナイロン製の濾布ａと、該濾布ａと略同じ大きさのメッシュシートｂとで構成される。そして、この濾布ａとメッシュシートｂを重ね、左右、底部の隅を縫着することにより、濾布ａが内側、メッシュシートｂが外側となる長尺な袋形状に成形する。そして、図５に示すように、その側面を水平方向に複数折り返すことにより、環状の襞が上下方向に複数連続する蛇腹形状の襞状濾過部５１を備えた濾過袋５０が形成される。ここで濾過袋５０は内外に重ねられた濾布ａとメッシュシートｂからなるものであり、濾過袋５０は濾布ａよりなる袋状の内側袋部５５と、メッシュシートｂからなり内側袋部５５を外側から被覆する外側袋部５６とで構成される。また、縫着された底部にはケーク回収用の排出孔５７が形成される。そして、その近傍には外側から樹脂性の結束具５８が取り付けられており、排出孔５７は、該結束具５８により開閉可能に閉塞される。   The filter bag 50 of this embodiment is composed of the same long nylon filter cloth a as in the first embodiment, and a mesh sheet b having approximately the same size as the filter cloth a. And this filter cloth a and the mesh sheet | seat b are piled up, and it shape | molds in the elongate bag shape by which the filter cloth a becomes an inner side and the mesh sheet | seat b becomes an outer side by sewing the corner of right and left and a bottom part. Then, as shown in FIG. 5, a plurality of side surfaces are folded back in the horizontal direction, thereby forming a filtration bag 50 having a bellows-shaped bowl-shaped filtration part 51 in which a plurality of ring-shaped ridges are continuous in the vertical direction. Here, the filter bag 50 is composed of a filter cloth a and a mesh sheet b stacked on the inside and outside, and the filter bag 50 is composed of a bag-like inner bag portion 55 made of the filter cloth a and a mesh sheet b and an inner bag portion. An outer bag portion 56 that covers 55 from the outside. Also, a drain hole 57 for collecting the cake is formed in the sewn bottom. In the vicinity thereof, a resinous binding tool 58 is attached from the outside, and the discharge hole 57 is closed by the binding tool 58 so as to be opened and closed.

また、濾過袋５０の襞状濾過部５１の襞形状は、濾過タンク１への装着時に形成する。すなわち、図６に示すように、襞形状のない長尺な袋状の濾過袋５０を底部から濾過タンク１内に収納し、少しずつ濾過空間１１に押し込んでいくと、その側面部が底部側から水平方向に撓み、内方に折り返されて環状の襞が形成されていく。そして、濾過袋５０全てが濾過空間１１に収まるまで、これを繰り替えすと、図４に示すように、濾過タンク１の内周面と対向する位置に、襞状濾過部５１を有する本実施例の濾過袋５０が形成される。   Further, the bowl shape of the bowl-shaped filtration part 51 of the filtration bag 50 is formed when the filtration bag 1 is attached to the filtration tank 1. That is, as shown in FIG. 6, when a long bag-shaped filter bag 50 without a bowl shape is stored in the filter tank 1 from the bottom and is gradually pushed into the filter space 11, the side surface portion is on the bottom side. It bends in the horizontal direction and is folded back inward to form an annular ridge. And if this is repeated until all the filtration bags 50 are settled in the filtration space 11, as shown in FIG. 4, the present Example which has the bowl-shaped filtration part 51 in the position facing the inner peripheral surface of the filtration tank 1 is shown. The filter bag 50 is formed.

本実施例の濾過装置による濾過処理は、基本的に第一実施例と同様に行われる。まず、送水ポンプの作動により、供給管路８から原液が導入され、開口部５３から濾過袋５０内へ流入する。流入した原液は、濾過袋５０の中央を介して流下し、外方の襞状濾過部５１にまで滞りなく浸入する。そして、濾過袋５０は、原液の液圧により次第に膨らみ、図７に示すように襞状濾過部５１は、濾過タンク１の内周面の通水スペーサ１９ａに外周部分を圧接すると共に、襞状濾過部５１の内方に折り返された部分は外側で上下に隣接する部分と貼り付くように重なることとなる。ここで、襞状濾過部５１の相互に重なる部分には、第一実施例の環状濾過部４２と同様に大小の皺ｐが全面に生じるため、襞状濾過部５１の相互に重なる部分にあっても、濾過が行われることとなる。さらに、本実施例においては、濾過袋５０は濾布ａからなる内側袋部５５とメッシュシートｂからなる外側袋部５６とを重ね合わせたものであるから、相互に重なる部分の濾布ａ，ａの間にはメッシュシートｂが介在することとなる。すなわち、襞状濾過部５１の相互に重なる部分の間には、皺ｐだけでなく、メッシュシートｂによる通水領域も形成されるため、メッシュシートｂの介在しない構成に比べて、かかる部分の濾布ａおいては、より高効率で濾過が行われる。   The filtration process by the filtration apparatus of the present embodiment is basically performed in the same manner as in the first embodiment. First, the stock solution is introduced from the supply pipe 8 by the operation of the water pump and flows into the filter bag 50 from the opening 53. The undiluted stock solution flows down through the center of the filter bag 50 and enters the outer bowl-shaped filtration part 51 without any delay. Then, the filtration bag 50 gradually expands due to the liquid pressure of the stock solution. As shown in FIG. 7, the bowl-shaped filtration part 51 presses the outer peripheral portion against the water flow spacer 19a on the inner circumferential surface of the filtration tank 1 and has a bowl-like shape. The part folded inward of the filtration part 51 will overlap with the part which adjoins up and down on the outside. Here, since the large and small ridges p are generated on the entire surface of the overlapping portion of the bowl-shaped filtration part 51 as in the case of the annular filtration part 42 of the first embodiment, However, filtration will be performed. Further, in this embodiment, the filter bag 50 is formed by superposing the inner bag portion 55 made of the filter cloth a and the outer bag portion 56 made of the mesh sheet b, so that the filter cloth a, A mesh sheet b is interposed between a. That is, since not only the ridges p but also the water passing area by the mesh sheet b is formed between the overlapping parts of the bowl-shaped filtration part 51, compared to the configuration without the mesh sheet b, In the filter cloth a, filtration is performed with higher efficiency.

このように、本実施例の濾過装置にあっても、濾過袋５０の開口部５３を除く略全面が濾過作用を生じ、何重にも折り畳まれた濾布ａの略全てにおいて濾過が行われる。また、濾過袋５０は、濾布ａからなる内側袋部５５と、メッシュシートｂからなる外側袋部５６とを重ねた構成であるため、襞状濾過部５１の相互に重なる部分においても、効率よく濾過が行われることとなる。このため、同素材の濾布ａで形成された折畳み構造のないシンプルな濾過袋を、本実施例の濾過袋５０に替えて用いた場合と比べて、約９倍の濾過面積が実現され、濾過開始直後の濾過速度、ケーク回収量ともに約８倍にまで向上されている。   As described above, even in the filtration device of the present embodiment, almost the entire surface excluding the opening 53 of the filtration bag 50 has a filtration action, and filtration is performed on almost all of the filter cloth a folded in layers. . Moreover, since the filtration bag 50 is the structure which piled up the inner side bag part 55 which consists of the filter cloth a, and the outer side bag part 56 which consists of the mesh sheet | seat b, it is efficient also in the part which the bowl-shaped filtration part 51 mutually overlaps. Filtration is often performed. For this reason, compared with the case where the simple filter bag without the folding structure formed with the filter cloth a of the same material is used instead of the filter bag 50 of the present embodiment, a filtration area of about 9 times is realized, The filtration rate immediately after the start of filtration and the amount of cake recovered are improved to about 8 times.

次に、本実施例の濾過装置におけるケーク回収作業を、図８を参照して説明する。
本実施例では、濾過袋５０を、その折畳み構造を維持したまま、タンク主体２から取り出すのではなく、取り出す際に、襞状濾過部５１を伸展させて、濾布ａに付着したケークｃを袋底部に落下させる。すなわち、脱水処理後、開閉蓋４を開放し、保持リング２１をタンク主体２から外す。そして、図８に示すように、濾過袋５０の開口部５３を把持し上方に引き上げて、襞状濾過部５１の襞を上部から伸展させる。この際に、濾過袋５０の伸展した部分を叩き、濾布ａを振動させることにより、濾布ａに付着したケークｃを下方へと剥がし落とす。そして、これを繰り返すことにより、襞状濾過部５１が完全に伸展した状態で、濾過袋５０はタンク主体２から取り出され、濾過袋５０内のケークｃは袋の底部に堆積することとなる。従って、底部に堆積したケークｃは、結束具５８を緩め、排出孔５７を開放することにより、該排出孔から簡単に排出され、回収される。また、ケークｃを除去した濾過袋５０は、再び結束具５８を締め、排出孔５７を閉塞し、濾過タンク１に再装着することにより、使用し続けることができる。 Next, the cake collection | recovery operation | work in the filtration apparatus of a present Example is demonstrated with reference to FIG.
In this embodiment, the filter bag 50 is not removed from the tank main body 2 while maintaining its folded structure, but the cake c attached to the filter cloth a is removed by extending the bowl-shaped filtration part 51 when removing it. Drop it on the bottom of the bag. That is, after the dehydration process, the opening / closing lid 4 is opened, and the holding ring 21 is removed from the tank main body 2. And as shown in FIG. 8, the opening part 53 of the filtration bag 50 is hold | gripped and pulled up, and the wrinkle of the bowl-shaped filtration part 51 is extended from upper part. At this time, the extended portion of the filter bag 50 is hit and the filter cloth a is vibrated, whereby the cake c attached to the filter cloth a is peeled downward. By repeating this, the filter bag 50 is taken out from the tank main body 2 in a state where the bowl-shaped filter part 51 is completely extended, and the cake c in the filter bag 50 is deposited on the bottom of the bag. Therefore, the cake c deposited on the bottom is easily discharged from the discharge hole and collected by loosening the binding tool 58 and opening the discharge hole 57. The filter bag 50 from which the cake c has been removed can be used continuously by tightening the binding tool 58 again, closing the discharge hole 57, and reattaching the filter tank 1.

このように、本実施例の濾過袋５０にあっては、ケーク回収作業において、襞状濾過部５１を伸展させ、濾過袋５０を長尺な袋形状にする必要があるが、上記のような方法を用いて、底部に形成された排出孔５７からケークｃを取り出すようにすれば、ケークｃを容易に回収することができる。   Thus, in the filter bag 50 of the present embodiment, it is necessary to extend the bowl-shaped filter part 51 and make the filter bag 50 into a long bag shape in the cake collecting operation. If the cake c is taken out from the discharge hole 57 formed in the bottom using the method, the cake c can be easily recovered.

なお、本発明は、上記実施例の方法に限定したものではなく、本発明の主旨の範囲内で適宜変更可能である。例えば、図示した環状濾過部については、袋状の濾布を上下に６回折り返してなるものであるが、その折り返す回数や上下幅は、任意に変更可能である。同様に襞状濾過部の襞形状についても、形成する襞の数、襞の幅等は本実施例で示す以外にも変更できる。また、実施例においては、濾過袋を濾布のみで構成した例と、濾布とメッシュシートと重ねて構成した二種類の実施例を示したが、濾過袋の材料は、各実施例の濾過袋の形状に対応させたものではなく、第一実施例の形状の濾過袋を、メッシュシートを用いて二重構造としてもよいし、第二実施例の形状の濾過袋を濾布のみで構成しても構わない。   In addition, this invention is not limited to the method of the said Example, In the range of the main point of this invention, it can change suitably. For example, the illustrated annular filtration unit is formed by folding a bag-shaped filter cloth up and down six times, but the number of times of folding and the vertical width can be arbitrarily changed. Similarly, the number of the ridges to be formed, the width of the ridges, and the like can be changed in addition to those shown in this embodiment with respect to the ridge shape of the ridge-shaped filtration part. Further, in the examples, the example in which the filter bag is configured by only the filter cloth and the two examples in which the filter cloth and the mesh sheet are overlapped are shown, but the material of the filter bag is the filtration of each example. The filter bag having the shape of the first embodiment may be a double structure using a mesh sheet, and the filter bag having the shape of the second embodiment is composed only of a filter cloth. It doesn't matter.

さらに、本実施例で用いた濾過タンクや、濾過装置のその他の構成についても、従来構成を好適に使用可能であり、本実施例で示した構成に替えて適宜実施することができる。例えば本実施例では原液を濾過するのに、原液の供給側からの加圧方式で行っているが、濾過液の排出側からの減圧方式で行うものでも構わない。また、濾過助剤により濾過袋のプレコートを行うことも可能である。また、濾過タンクの、通水スペーサや濾過空間の形状についても、本発明の主旨を逸脱しない範囲で変更することができる。   Furthermore, the conventional configuration can be suitably used for the filtration tank used in the present embodiment and other configurations of the filtration device, and can be appropriately implemented instead of the configuration shown in the present embodiment. For example, in this embodiment, the undiluted solution is filtered by the pressurization method from the undiluted solution supply side, but may be performed by the depressurization method from the defiltrate discharge side. It is also possible to precoat the filter bag with a filter aid. Further, the shape of the water passage spacer and the filtration space of the filtration tank can be changed without departing from the gist of the present invention.

第一実施例の濾過装置の縦断面図である。It is a longitudinal cross-sectional view of the filtration apparatus of a 1st Example. 濾過袋４０を縦断して示す上方斜視図である。It is an upper perspective view which cuts and shows the filtration bag 40 longitudinally. 濾過処理時の原液の流れを示す説明図である。It is explanatory drawing which shows the flow of the stock solution at the time of a filtration process. 第二実施例の濾過装置の縦断面図である。It is a longitudinal cross-sectional view of the filtration apparatus of 2nd Example. 濾過袋５０の上方斜視図である。4 is an upper perspective view of the filtration bag 50. FIG. 濾過袋５０の装着方法を示す説明図である。It is explanatory drawing which shows the mounting method of the filtration bag. 濾過処理時の原液の流れを示す説明図である。It is explanatory drawing which shows the flow of the stock solution at the time of a filtration process. 濾過袋５０の取り外し方法を示す説明図である。It is explanatory drawing which shows the removal method of the filtration bag. 従来の濾過装置を示す概略図である。It is the schematic which shows the conventional filtration apparatus.

符号の説明Explanation of symbols

１ 濾過タンク
２ タンク主体
３ 開口
４ 開閉蓋
７ａ，７ｂ 閉止バルブ
８ 供給管路
９ エア管路
１１ 濾過空間
１２ 排出管路
１６ 通水領域
１７ 通水領域
１８ 通水領域
１９，１９ａ，１９ｂ 通水スペーサ
２１ 保持リング
４０ 濾過袋
４１ 外周濾過部
４２ 環状濾過部
４３ 開口部
４４ 下底濾過部
５０ 濾過袋
５１ 襞状濾過部
５３ 開口部
５４ 下底濾過部
５５ 内側袋部
５６ 外側袋部
５７ 排出孔
５８ 結束具
６０ 濾過袋
６１ 開口部
ａ 濾布
ｂ メッシュシート
ｃ ケーク
ｐ 皺 DESCRIPTION OF SYMBOLS 1 Filtration tank 2 Tank main body 3 Opening 4 Opening / closing lid 7a, 7b Closing valve 8 Supply line 9 Air line 11 Filtration space 12 Drain line 16 Water flow area 17 Water flow area 18 Water flow area 19, 19a, 19b Water flow Spacer 21 Retaining ring 40 Filtration bag 41 Peripheral filtration part 42 Annular filtration part 43 Opening part 44 Lower bottom filtration part 50 Filtration bag 51 Gutter-like filtration part 53 Opening part 54 Lower bottom filtration part 55 Inner bag part 56 Outer bag part 57 Discharge hole 58 Binder 60 Filter bag 61 Opening a Filter cloth b Mesh sheet c Cake p 皺

Claims (7)

内部に濾過空間が形成された筒状の濾過タンクと、該濾過タンクの上部に接続される原液の供給管路と、濾過タンクの下部に接続される濾過液の排出管路と、上端に開口を有し、濾過空間に着脱可能に装着される濾過袋とを備え、
供給管路から濾過袋内へ導入された原液を濾過袋により濾過し、濾過袋外に透過した濾過液を排出管路から濾過タンク外へ導出する濾過装置にあって、
濾過袋は、濾過空間よりも上下に長尺な濾布で構成され、
濾過空間の上部に保持される開口部と、該開口部の下方で濾過タンクの内周面と対向する筒状の外周濾過部と、外周濾過部の下端から内方に複数回上下に折り返されて、濾過タンクの内底面から不定形に起立するほぼ同心状の環状濾過部とを備えてなり、
濾過袋内に導入した原液を、外周濾過部と環状濾過部とにより濾過し、透過した濾過液を排出管路から導出することを特徴とする濾過装置。 A cylindrical filtration tank having a filtration space formed therein, a supply line for a concentrate connected to the upper part of the filtration tank, a discharge pipe for a filtrate connected to the lower part of the filtration tank, and an opening at the upper end And a filtration bag that is detachably attached to the filtration space,
In the filtration device for filtering the stock solution introduced into the filter bag from the supply pipe through the filter bag and leading the filtrate permeated out of the filter bag to the outside of the filter tank from the discharge pipe,
The filtration bag is composed of a filter cloth that is longer than the filtration space.
An opening held at the top of the filtration space, a cylindrical outer filtration part facing the inner circumferential surface of the filtration tank below the opening, and folded up and down several times inward from the lower end of the outer filtration part And a substantially concentric annular filtration part that rises indefinitely from the inner bottom surface of the filtration tank,
A filtration apparatus, wherein the stock solution introduced into a filtration bag is filtered by an outer peripheral filtration part and an annular filtration part, and the permeated filtrate is led out from a discharge pipe. 内部に濾過空間が形成された筒状の濾過タンクと、該濾過タンクの上部に接続される原液の供給管路と、濾過タンクの下部に接続される濾過液の排出管路と、上部に開口を有し、濾過空間に着脱可能に装着される濾過袋とを備え、
供給管路から濾過袋内へ導入された原液を濾過袋により濾過し、濾過袋外に透過した濾過液を排出管路から濾過タンク外へ導出する濾過装置にあって、
濾過袋は、濾過空間よりも上下に長尺な濾布で構成され、
濾過空間の上部に保持される開口部と、
水平方向に折り返されてなる環状の襞が上下方向に複数連続し、かつ開口部の下方で濾過タンクの内周面と対向する襞状濾過部とを備えてなり、
濾過袋内に導入した原液を襞状濾過部により濾過し、透過した濾過液を排出管路から導出することを特徴とする濾過装置。 A cylindrical filtration tank having a filtration space formed therein, a supply line for a concentrate connected to the upper part of the filtration tank, a discharge pipe for a filtrate connected to the lower part of the filtration tank, and an opening at the upper part And a filtration bag that is detachably attached to the filtration space,
In the filtration device for filtering the stock solution introduced into the filter bag from the supply pipe through the filter bag and leading the filtrate permeated out of the filter bag to the outside of the filter tank from the discharge pipe,
The filtration bag is composed of a filter cloth that is longer than the filtration space.
An opening held at the top of the filtration space;
A plurality of annular ridges that are folded back in the horizontal direction are provided in the vertical direction, and are provided with a ridge-shaped filtration portion that faces the inner peripheral surface of the filtration tank below the opening,
A filtration apparatus, wherein the stock solution introduced into a filtration bag is filtered by a bowl-shaped filtration section, and the permeated filtrate is led out from a discharge pipe. 濾過袋の底部に、該濾過袋内に堆積したケークを排出する排出孔と、該排出孔を開閉する開閉手段とが設けられていることを特徴とする請求項２記載の濾過装置。   3. The filtration apparatus according to claim 2, wherein a discharge hole for discharging the cake accumulated in the filtration bag and an opening / closing means for opening and closing the discharge hole are provided at the bottom of the filtration bag. 濾過袋が、濾布よりなる袋状の内側袋部と、該濾布よりも通水性の高い可撓性シートからなり、内側袋部を外側から被覆する外側袋部とで構成されていることを特徴とする請求項１乃至請求項３のいずれかに記載の濾過装置。   The filtration bag is composed of a bag-like inner bag portion made of a filter cloth and an outer bag portion made of a flexible sheet having a higher water permeability than the filter cloth and covering the inner bag portion from the outside. The filtration device according to any one of claims 1 to 3. 原液の供給管路と濾過液の排出管路とが上下に接続された筒状の濾過タンク内に着脱可能に装着され、袋内に導入された原液を濾過する、濾過装置に用いられる濾過袋であって、
濾過タンク内に形成された濾過空間よりも上下に長尺な濾布で構成され、濾過空間の上部に保持される開口部と、該開口部の下方で濾過タンクの内周面と対向する筒状の外周濾過部と、外周濾過部の下端から内方に複数回上下に折り返されて、濾過タンクの内底面から不定形に起立するほぼ同心状の環状濾過部とを備えてなることを特徴とする濾過装置に用いられる濾過袋。 A filtration bag used in a filtration device, which is detachably mounted in a cylindrical filtration tank in which a stock solution supply pipe and a filtrate discharge pipe are connected vertically, and filters the stock solution introduced into the bag. Because
An opening that is formed by a filter cloth that is vertically longer than the filtration space formed in the filtration tank, is held at the upper part of the filtration space, and a cylinder that faces the inner peripheral surface of the filtration tank below the opening. And a substantially concentric annular filtration part which is folded up and down several times inward from the lower end of the outer filtration part and stands up indefinitely from the inner bottom surface of the filtration tank. A filtration bag used in the filtration device. 原液の供給管路と濾過液の排出管路とが上下に接続された筒状の濾過タンク内に着脱可能に装着され、袋内に導入された原液を濾過する、濾過装置に用いられる濾過袋であって、
濾過タンク内に形成された濾過空間よりも上下に長尺な濾布で構成され、その上部に開口を有すると共に、その底部に、内部に堆積したケークを排出する排出孔と、該排出孔を開閉する開閉手段とが設けられていることを特徴とする濾過装置に用いられる濾過袋。 A filtration bag used in a filtration device, which is detachably mounted in a cylindrical filtration tank in which a stock solution supply pipe and a filtrate discharge pipe are connected vertically, and filters the stock solution introduced into the bag. Because
It is composed of a filter cloth that is vertically longer than the filtration space formed in the filtration tank, and has an opening at the top, a discharge hole for discharging cake deposited inside at the bottom, and the discharge hole. The filtration bag used for the filtration apparatus characterized by providing the opening-and-closing means to open and close. 濾布よりなる袋状の内側袋部と、該濾布よりも通水性の高い可撓性シートからなり、内側袋部を外側から被覆する外側袋部とで構成されていることを特徴とする請求項５又は請求項６に記載の濾過装置に用いられる濾過袋。
A bag-shaped inner bag portion made of a filter cloth, and a flexible sheet having a higher water permeability than the filter cloth, the outer bag portion covering the inner bag portion from the outside. The filtration bag used for the filtration apparatus of Claim 5 or Claim 6.
JP2003379341A 2003-11-10 2003-11-10 Filter and filter bag used for the same Pending JP2005138064A (en)

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