JPH10230106A - Method and device for washing fibrous filter medium in filter - Google Patents

Method and device for washing fibrous filter medium in filter

Info

Publication number
JPH10230106A
JPH10230106A JP9037297A JP3729797A JPH10230106A JP H10230106 A JPH10230106 A JP H10230106A JP 9037297 A JP9037297 A JP 9037297A JP 3729797 A JP3729797 A JP 3729797A JP H10230106 A JPH10230106 A JP H10230106A
Authority
JP
Japan
Prior art keywords
region
filter
filtration
tank
filter medium
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
Application number
JP9037297A
Other languages
Japanese (ja)
Inventor
Toshio Koshida
Masao Kunigara
雅男 国柄
俊雄 越田
Original Assignee
Koyo Kensetsu Kogyo Kk
Mitsui Mining Co Ltd
S L:Kk
三井鉱山株式会社
株式会社エス・エル
甲陽建設工業株式会社
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Koyo Kensetsu Kogyo Kk, Mitsui Mining Co Ltd, S L:Kk, 三井鉱山株式会社, 株式会社エス・エル, 甲陽建設工業株式会社 filed Critical Koyo Kensetsu Kogyo Kk
Priority to JP9037297A priority Critical patent/JPH10230106A/en
Publication of JPH10230106A publication Critical patent/JPH10230106A/en
Granted legal-status Critical Current

Links

Abstract

PROBLEM TO BE SOLVED: To satisfactorily and efficiently perform washing of fibrous filter media in a filter in which a filtration layer is constituted of the fibrous filter media. SOLUTION: The inside of a filter tank 11 is partitioned into a middle part region 13 in which a filtration layer is formed and into the upper and lower regions 14, 15 by both a perforated plate 41 supporting the filtration layer consisting of fibrous media 3a and a perforated plate 8 arranged in its upper part. A part 17b of washing water 17 is circulated and supplied from the upper region 14 to the lower region 15 through a circulation path 18 and a booster pump 19 while forming a horizontal spiral flow along the inner peripheral face of the filter tank 11 . Simultaneously, cleaning air 22 is convergently spouted from the partition part 15a of the lower region 15 to the region part 13a of the middle part in the just above direction. In the region 13 of the middle part, a strong ascending current 17e is formed in the region part 13a of the middle part by air lift effect and thereby the filtration layer is rapidly disentangled and also circulation currents 17f due to difference in density are formed in the intervals of the region parts 13b of other middle parts. The fibrous filter media 3a are mixed and agitated uniformly and sufficiently.

Description

【発明の詳細な説明】 DETAILED DESCRIPTION OF THE INVENTION

【0001】 [0001]

【発明の属する技術分野】本発明は、スイミングプー
ル,修景池,温泉等において好適に使用される濾過装置
であって、特に、多孔材製の濾材支持板上に塊状の繊維
質濾材を積層支持させることによって、濾過槽内に被処
理水が下降通過する濾過層を形成してなる濾過装置にお
いて、濾過運転時間が一定時間に達した場合や濾過損失
水頭が一定値に達した場合に、濾過機能を回復,維持す
べく繊維質濾材を洗浄させるための方法及びこれを実施
するための装置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 device preferably used in swimming pools, scenic ponds, hot springs, etc., and in particular, a block-like fibrous filter medium laminated on a porous filter medium support plate. By supporting, in a filtration device that forms a filtration layer through which water to be treated descends in the filtration tank, when the filtration operation time reaches a certain time or when the filtration loss head reaches a certain value, The present invention relates to a method for cleaning a fibrous filter medium to recover and maintain a filtration function, and an apparatus for performing the method.

【0002】[0002]

【従来の技術】濾過装置としては、伝統的に、濾過槽内
に砂層を形成して、被処理水を下降通過させることによ
り、被処理水中の汚濁物質つまり微細な固形物質を砂層
の表面層部分で捕捉,除去するように構成された砂濾過
装置が知られているが、濾過層たる砂層の表層部分のみ
で汚濁物質を捕捉するようにしているため、どうしても
濾過槽が大型化するといった欠点があり、濾過機能回復
のための洗浄(逆洗)に大量の清浄水を必要とするとい
った問題があった。すなわち、砂層の表層部分における
砂と捕捉物質とをほぐして分離除去するために濾過水量
の5%程度の洗浄水を必要とし、しかも洗浄水が砂層内
部に浸透するため、洗浄水として汚濁物質を含まない清
浄水を使用する必要があった。
2. Description of the Related Art Conventionally, as a filtration apparatus, a sand layer is formed in a filtration tank and the water to be treated is allowed to pass downward so that pollutants, that is, fine solid substances, in the water to be treated are removed from the surface layer of the sand layer. There is a known sand filtration device that is configured to trap and remove the pollutants at the surface, but since the pollutants are trapped only at the surface layer of the sand layer as the filtration layer, the disadvantage is that the filtration tank is necessarily enlarged. There is a problem that a large amount of clean water is required for washing (backwashing) for recovering the filtration function. That is, in order to loosen and remove the sand and the trapped substance in the surface layer of the sand layer, about 5% of the filtered water is required for the washing water, and the washing water penetrates into the sand layer. It was necessary to use clean water that did not contain it.

【0003】そこで、近時、多孔材製の濾材支持板上に
塊状の繊維質濾材を積層支持させることによって、濾過
槽内に被処理水が下降通過する濾過層を形成してなる濾
過装置が提案されている。すなわち、かかる濾過装置
は、濾過層全面で濾過機能を発揮させるため濾過槽の小
型化を図ることができると共に、濾過抵抗が小さいため
高速濾過を実現し得て濾過効率の向上を図ることができ
る等、極めて優れた濾過機能を発揮するものである。ま
た、繊維質濾材は極めて低比重のものであることから、
洗浄水中において曝気することにより容易に混合,攪拌されて、簡便且つ効果的な濾材洗浄を行うことができる。 By aeration in the washing water, the filter media can be easily mixed and stirred to perform simple and effective washing of the filter medium. さらに、多少汚濁した水を使用しても、繊維質濾材が均一に混合,攪拌される限り、洗浄効果上、何らの問題も生じないことから、洗浄水として被処理水を使用することができる。 Further, even if slightly polluted water is used, as long as the fibrous filter medium is uniformly mixed and stirred, no problem occurs in the cleaning effect, so that the water to be treated can be used as the cleaning water. .. [0003] In recent years, there has been proposed a filtering apparatus in which a massive fibrous filter medium is laminated and supported on a porous filter medium support plate to form a filtration layer through which water to be treated passes downward in a filtration tank. Proposed. That is, such a filtration device can achieve a reduction in size of the filtration tank because the filtration function is exerted on the entire surface of the filtration layer, and can realize high-speed filtration due to low filtration resistance, thereby improving filtration efficiency. And so on, which exhibit an extremely excellent filtration function. Also, since the fibrous filter medium is of a very low specific gravity, [0003] In recent years, there has been proposed a filtration apparatus in which a massive fibrous filter medium is laminated and supported on a porous filter medium support plate to form a filtration layer through which water to be treated passes downward in a filtration tank. Proposed. That is, such a filtration device can achieve a reduction in size of the filtration tank because the filtration function is exerted on the entire surface of the filtration layer, and can realize high-speed filtration due to low filtration resistance, thereby improving filtration. efficiency. And so on, which exhibit an extremely excellent filtration function. Also, since the fibrous filter medium is of a very low specific gravity,
Mixing and stirring are easily performed by aeration in the washing water, so that simple and effective washing of the filter medium can be performed. Furthermore, even if slightly polluted water is used, as long as the fibrous filter medium is uniformly mixed and stirred, there is no problem in terms of the cleaning effect, so that the water to be treated can be used as the cleaning water. . Mixing and stirring are easily performed by aeration in the washing water, so that simple and effective washing of the filter medium can be performed. Further, even if slightly polluted water is used, as long as the fibrous filter medium is uniformly mixed and stirred, There is no problem in terms of the cleaning effect, so that the water to be treated can be used as the cleaning water.

【0004】 [0004]

【発明が解決しようとする課題】ところで、砂濾過装置
にあっては、濾材洗浄は砂層の表層部分のみを集中的に
行なえばよく、砂層構成濾材を全面的に混合させる必要
がなく、砂のエクスパンションのみで行なうことができ
るが、繊維質濾材を使用した濾過装置にあっては、濾過
層の表層部分から底層部分に至る全面において汚濁物質
の捕捉が行なわれるため、濾過層構成濾材をすべて洗浄
水中で均一且つ充分に混合,攪拌させる必要がある。し
かし、濾過層領域の全面に洗浄空気を吹き込む全面曝気
方式を採用した場合、洗浄水中に気泡が充満すると、洗
浄水の見掛比重が減少するため、繊維質濾材は、それが
低比重のものであるにも拘わらず、洗浄水中を上昇する
どころか、逆に沈降することになる。したがって、繊維
質濾材の混合,攪拌が充分に行なわれず、洗浄水量の低
減を図ることができない。
By the way, in the sand filtration device, the filter medium needs to be intensively washed only on the surface layer of the sand layer, and it is not necessary to mix the filter material constituting the sand layer over the entire surface. Although filtration can be performed only by expansion, in a filtration device using a fibrous filter medium, pollutants are trapped on the entire surface from the surface layer to the bottom layer of the filter layer. It is necessary to mix and stir uniformly and sufficiently in water. However, when the entire surface of the filtration layer area is blown with cleaning air, the apparent specific gravity of the cleaning water decreases if bubbles are filled in the cleaning water. Nevertheless, instead of rising in the washing water, it will sink down. Therefore, the mixing and stirring of the fibrous filter media are not sufficiently performed, and the amount of washing water cannot be reduced.

【0005】そこで、繊維質濾材を洗浄するに当たって
は、濾過層領域の一部に集中曝気させるようにすること
が好ましい。すなわち、このような局部的な曝気を行な
うと、曝気領域部分と非曝気領域部分との間に密度差が
生じる結果、曝気領域部分を上昇して非曝気領域部分を
下降する洗浄水の循環流が形成されることになり、繊維
質濾材を両領域部分間で強制循環させることができる。
したがって、繊維質濾材の混合,攪拌が充分に行なわれて、捕捉汚濁物質が容易に剥離され、洗浄水量の低減を図ることができる。 Therefore, the fibrous filter medium is sufficiently mixed and stirred, the trapped pollutants are easily peeled off, and the amount of washing water can be reduced. 本発明者が確認したところでは、洗浄水量を濾過水量の1%程度まで低減させることができた。 As confirmed by the present inventor, the amount of washing water could be reduced to about 1% of the amount of filtered water. [0005] Therefore, when washing the fibrous filter medium, it is preferable to concentrate and aerate a part of the filter layer region. In other words, when such local aeration is performed, a density difference occurs between the aerated area portion and the non-aerated area portion, and as a result, the circulation flow of the washing water rising in the aerated area portion and descending in the non-aerated area portion. Is formed, and the fibrous filter medium can be forcedly circulated between the two regions. [0005] Therefore, when washing the fibrous filter medium, it is preferred to concentrate and aerate a part of the filter layer region. In other words, when such local aeration is performed, a density difference occurs between the aerated area portion and the non -aerated area portion, and as a result, the circulation flow of the washing water rising in the aerated area portion and descending in the non-aerated area portion. Is formed, and the fibrous filter medium can be forcedly circulated between the two regions.
Therefore, the mixing and stirring of the fibrous filter medium is sufficiently performed, the trapped pollutants are easily peeled off, and the amount of washing water can be reduced. The present inventors have confirmed that the amount of washing water can be reduced to about 1% of the amount of filtered water. Therefore, the mixing and stirring of the fibrous filter medium is sufficiently performed, the trapped pollutants are easily peeled off, and the amount of washing water can be reduced. The present inventors have confirmed that the amount of washing water can be reduced to about 1 % of the amount of filtered water.

【0006】しかし、繊維質濾材は弾力性に富むものであるから、その圧縮程度は濾過速度に比例して大きくなる。すなわち、濾過速度が大きくなるに従い、濾過層の圧密化程度も大きくなり、特に、濾過層の底層部分では著しい。このような濾過層の速度水頭による圧密化は、
具体的には、濾過速度が30m/hを超える場合において顕著となり、100m/h〜120m/h程度ともなると、濾過層体積は1/3程度にまで固く圧密化されることになる。 Specifically, it becomes remarkable when the filtration rate exceeds 30 m / h, and when it reaches about 100 m / h to 120 m / h, the volume of the filtration layer is firmly compacted to about 1/3. However, since the fibrous filter medium is rich in elasticity, the degree of compression increases in proportion to the filtration speed. That is, as the filtration rate increases, the degree of consolidation of the filtration layer also increases, and is particularly remarkable in the bottom part of the filtration layer. Such consolidation by the velocity head of the filtration layer However, since the fibrous filter medium is rich in elasticity, the degree of compression increases in proportion to the filtration speed. That is, as the filtration rate increases, the degree of consolidation of the filtration layer also increases, and is particularly remarkable in the bottom part of the filtration layer. Such consolidation by the velocity head of the filtration layer.
Specifically, it becomes remarkable when the filtration speed exceeds 30 m / h, and when the filtration speed is about 100 m / h to 120 m / h, the volume of the filtration layer is firmly consolidated to about 1/3. Specifically, it becomes remarkable when the filtration speed exceeds 30 m / h, and when the filtration speed is about 100 m / h to 120 m / h, the volume of the filtration layer is firmly consolidated to about 1/3.

【0007】したがって、濾過層がこのように圧密化さ
れた状態では、その底層部分では更に圧密化されている
こと及び濾材相互が捕捉汚濁物質により接着しているこ
ととも相俟って、上記した局部的な曝気ないしこれによ
る循環流の形成によっては濾過層をほぐすことが容易で
はなく、効率的な濾材洗浄を行い得ない。すなわち、局
部的な曝気によっては、濾過層がほぐれた後においては
良好な洗浄を行なうことができるものの、濾過層をほぐ
すまでにかなりの時間を要する。本発明者が確認したと
ころでは、全面的な曝気による場合は勿論、局部的な曝
気による場合にも、圧密化された濾過層がほぐされるま
でに、少なくとも5分程度は必要であった。
[0007] Therefore, in the state where the filtration layer is compacted in this way, the above is combined with the fact that the bottom layer portion is further compacted and that the filter media are adhered to each other by trapped pollutants. It is not easy to loosen the filter layer by local aeration or the formation of a circulating flow thereby, and it is not possible to carry out efficient filter medium washing. In other words, depending on the local aeration, good cleaning can be performed after the filtration layer is loosened, but it takes a considerable time to loosen the filtration layer. The present inventor has confirmed that it takes at least about 5 minutes for the compacted filter layer to be loosened not only in the case of full aeration but also in the case of local aeration.

【0008】本発明は、このような点に鑑みて、濾過層
が甚だしく圧密化されるような高速濾過条件(30m/
hを超える条件)下においても、濾過層を速やかにほぐ
し得ると共に繊維質濾材の混合,攪拌を均一且つ充分に
行なうことができ、繊維質濾材を良好且つ効率良く洗浄
することができる方法とこれを好適に実施するための洗
浄装置を提供することを目的とするものである。
[0008] In view of the above, the present invention provides high-speed filtration conditions (30 m / m) in which the filtration layer is extremely compacted.
h), the filter layer can be quickly loosened, and the mixing and stirring of the fibrous filter medium can be performed uniformly and sufficiently, and the fibrous filter medium can be washed well and efficiently. It is an object of the present invention to provide a cleaning device for suitably performing the above. h), the filter layer can be quickly loosened, and the mixing and stirring of the fibrous filter medium can be performed uniformly and sufficiently, and the fibrous filter medium can be washed well and efficiently. It is an object of the present invention to provide a cleaning device for suitably performing the above.

【0009】 [0009]

【課題を解決するための手段】本発明は、多孔材製の濾
材支持板上に塊状の繊維質濾材を積層支持させることに
よって、濾過槽内に被処理水が下降通過する濾過層を形
成してなる濾過装置において、繊維質濾材の洗浄方法及
び洗浄装置を、上記の目的を達成すべく、特に、以下の
ように構成しておくことを提案する。
SUMMARY OF THE INVENTION According to the present invention, a filter layer is formed on a filter medium support plate made of a porous material by laminating and supporting a massive fibrous filter medium, through which water to be treated passes downward in a filtration tank. In order to achieve the above-mentioned object, it is proposed that a filter device for cleaning a fibrous filter medium be configured as follows, in order to achieve the above object.

【0010】すなわち、本発明の洗浄方法にあっては、
濾過層の所定量上方位に濾材支持板と同様の多孔材から
なる仕切板を配設して、この仕切板及び前記濾材支持板
により、濾過槽内を濾過層が存在する中間部領域とその
上下部領域とに区画しておき、濾過槽に満たされた洗浄
水の一部を、上部領域から槽外に取り出して加圧した上
で濾過槽の内周面に沿う水平旋回流をなして下部領域に
循環供給させると共に、洗浄空気を下部領域の一部から
その直上方位の中間部領域部分に集中して噴出させるよ
うにする。
That is, in the cleaning method of the present invention,
A partition plate made of the same porous material as the filter medium support plate is arranged in a predetermined amount in the upward direction of the filter layer, and the partition plate and the filter medium support plate allow the filter tank to pass through the filter tank in an intermediate region and the intermediate region. It is divided into upper and lower areas, and a part of the washing water filled in the filtration tank is taken out of the tank from the upper area, pressurized, and forms a horizontal swirling flow along the inner peripheral surface of the filtration tank. The cleaning air is circulated and supplied to the lower region, and the cleaning air is concentrated and jetted from a part of the lower region to the intermediate region in a direction directly above the lower region. A partition plate made of the same porous material as the filter medium support plate is arranged in a predetermined amount in the upward direction of the filter layer, and the partition plate and the filter medium support plate allow the filter tank to pass through the filter tank It is divided into upper and lower areas, and a part of the washing water filled in the filtration tank is taken out of the tank from the upper area, respectively, and forms a horizontal swirling flow along in an intermediate region and the intermediate region. The cleaning air is circulated and supplied to the lower region, and the cleaning air is concentrated and jetted from a part of the lower region to the intermediate region in a direction directly above the lower region.

【0011】また、かかる方法を実施するための本発明
の洗浄装置は、濾材支持板と同様の多孔材からなり、濾
過層の所定量上方位に配設されて、濾過槽内を、濾材支
持板と共に、濾過層が存在する中間部領域とその上下部
領域とに区画する仕切板と、濾過槽に満たされた洗浄水
の一部を上部領域から槽外に取り出して加圧した上で濾
過槽の内周面に沿う水平旋回流をなして下部領域に循環
供給させる洗浄水循環機構と、洗浄空気を下部領域の一
部からその直上方位の中間部領域部分に集中して噴出さ
せる洗浄空気噴出機構とを具備するものである。
Further, the washing apparatus of the present invention for carrying out such a method is made of a porous material similar to the filter medium support plate, is disposed in a predetermined amount upward of the filter layer, and supports the filter medium support in the filter tank. Along with the plate, a partition plate that partitions the intermediate region where the filtration layer exists and the upper and lower regions, and a part of the washing water filled in the filtration tank is taken out of the upper region out of the tank, pressurized, and filtered. A washing water circulation mechanism that circulates and supplies a horizontal swirling flow along the inner peripheral surface of the tank to the lower area, and a cleaning air jet that concentrates and jets cleaning air from a part of the lower area to the intermediate area part just above it And a mechanism.

【0012】而して、かかる構成によれば、濾過槽に満
たされた洗浄水の一部を上部領域から水平旋回流をなし
て下部領域に循環供給させると共に、下部領域の一部か
ら中間部領域部分に局部的且つ集中的な空気噴出を行な
うと、下部領域では、空気噴出が行なわれている下部領
域部分が局部的に減圧され、洗浄水が水平旋回している
こととも相俟って、洗浄水が当該下部領域部分に集中し
て流れ込み、噴出空気と共に当該下部領域部分の直上位
の中間領域部分へと上昇する。すなわち、下部領域にお
ける水平旋回流と局部的且つ集中的な空気噴出とによっ
て一種のエアリフト効果が発揮され、当該中間領域部分
に気液混合流体による強力な上昇流が生じることにな
る。そして、この上昇流は、洗浄水の一部が上部領域か
ら下部領域へと強制循環されることにより更に強力なも
のとなり、継続して発生する。したがって、濾過層を構
成する繊維質濾材が高速濾過によって圧密状態にある場
合や捕捉汚濁物による密着状態にある場合にも、濾過層
が極めて短時間でほぐされ、繊維質濾材が容易に浮上す
る。また、中間部領域においては、その全面に曝気され
ておらず、その一部である上記中間部領域部分において
のみ曝気が行なわれていることから、当該中間部領域部
分と曝気されない他の中間部領域部分との間で大きな密
度差が生じる。したがって、上記したエアリフト効果が
発揮されることとも相俟って、中間部領域においては、
曝気領域である中間部領域部分を上昇して非曝気領域である中間部領域部分を下降する循環流が生じて、上記した如くほぐされた繊維質濾材が均一に混合,攪拌される。 A circulating flow is generated that rises in the intermediate region portion, which is the aerated region, and descends in the intermediate region portion, which is the non-aerated region, and the fibrous filter media loosened as described above is uniformly mixed and stirred. これらのことから、中間部領域においては、繊維質濾材が洗浄水中において均一に混合,攪拌されて、強力に揉み洗いされることになり、これに捕捉されている汚濁物質が容易に剥離されることなる。 From these facts, in the intermediate region, the fibrous filter medium is uniformly mixed and agitated in the washing water, and is strongly kneaded and washed, and the pollutants trapped in the fibrous filter medium are easily peeled off. It will be different. According to this configuration, a part of the washing water filled in the filtration tank is circulated and supplied from the upper region to the lower region in a horizontal swirling flow, and a part of the lower region is circulated to the intermediate region. When the local and intensive air ejection is performed in the region, the lower region where the air ejection is performed is locally depressurized in the lower region, which is combined with the fact that the washing water is horizontally swirled. Then, the washing water flows into the lower region portion in a concentrated manner, and rises together with the blast air to the intermediate region portion immediately above the lower region portion. That is, the horizontal swirling flow in the lower region and the local and intensive air ejection exert a kind of air lift effect, and a strong upward flow due to the gas-liquid mixed fluid is generated in the intermediate region. The upward flow is further strengthened by the force According to this configuration, a part of the washing water filled in the filtration tank is circulated and supplied from the upper region to the lower region in a horizontal swirling flow, and a part of the lower region is circulated to the intermediate region. local and intensive air ejection is performed in the region, the lower region where the air ejection is performed is locally depressurized in the lower region, which is combined with the fact that the washing water is horizontally swirled. Then, the washing water flows into the lower region portion in a concentrated manner, and rises together with the blast air to the intermediate region portion immediately above the lower region portion. That is, the horizontal swirling flow in the lower region and the local and intensive air ejection exerting a kind of air. lift effect, and a strong upward flow due to the gas-liquid mixed fluid is generated in the intermediate region. The upward flow is further strengthened by the force d circulation of a part of the washing water from the upper region to the lower region, and is continuously generated. Therefore, even when the fibrous filter medium constituting the filter layer is in a compacted state by high-speed filtration or in an intimate state due to trapped contaminants, the filter layer is loosened in an extremely short time, and the fibrous filter medium easily floats. . Further, in the intermediate region, the entire surface is not aerated, and the aeration is performed only in the intermediate region, which is a part of the intermediate region. A large density difference occurs between the region and the region. Therefore, in combination with the fact that the air lift effect described above is exhibited, in the intermediate region, d circulation of a part of the washing water from the upper region to the lower region, and is continuously generated. Therefore, even when the fibrous filter medium rather the filter layer is in a compacted state by high-speed filtration or in an intimate state. Due to trapped contaminants, the filter layer is loosened in an extremely short time, and the fibrous filter medium easily floats. Further, in the intermediate region, the entire surface is not aerated, and the aeration is performed only in the intermediate region, Which is a part of the intermediate region. A large density difference occurs between the region and the region. Therefore, in combination with the fact that the air lift effect described above is exhibited, in the intermediate region,
A circulating flow is generated which rises in the middle region as the aeration region and descends in the middle region as the non-aeration region, whereby the fibrous filter medium loosened as described above is uniformly mixed and stirred. From these facts, in the intermediate region, the fibrous filter medium is uniformly mixed and agitated in the washing water, and is strongly rubbed and washed, and the pollutants trapped by the fibrous filter medium are easily peeled off. Different. A aerated flow is generated which rises in the middle region as the aeration region and descends in the middle region as the non-aeration region, therefore the fibrous filter medium loosened as described above is uniformly mixed and stirred. From these facts, in the intermediate region, the fibrous filter medium is uniformly mixed and agitated in the washing water, and is strongly rubbed and washed, and the pollutants trapped by the fibrous filter medium are easily peeled off. Different.

【0013】 [0013]

【発明の実施の形態】以下、本発明の実施の形態を図1
〜図5及び図6〜図11に基づいて具体的に説明する。
FIG. 1 is a block diagram showing an embodiment of the present invention.
5 to FIG. 5 and FIG. 6 to FIG.

【0014】図1〜図5は第1の実施の形態を示したもので、この実施の形態は圧力式の濾過装置に本発明を適用した例に係る。すなわち、濾過装置は、図1に示す如く、圧力式の濾過槽1 1とこれに付設した洗浄装置2 1
とからなる。
FIGS. 1 to 5 show a first embodiment, and this embodiment relates to an example in which the present invention is applied to a pressure-type filtration device. That is, the filtering device, as shown in FIG. 1, the cleaning apparatus 2 1 annexed to the filtration tank 1 1 of the pressure type
Consists of

【0015】濾過槽1 1は、図1及び図5に示す如く、
円筒状の密閉容器構造をなしており、内部には塊状の繊維質濾材3aを積層してなる所定厚さの濾過層3が形成されている。 It has a cylindrical closed container structure, and a filtration layer 3 having a predetermined thickness formed by laminating a massive fibrous filter medium 3a is formed inside. 繊維質濾材3aとしては、被処理水7より低比重であり且つ弾力を有する比表面積の大きなものであって、球状若しくはこれに近似する塊状をなすものが使用されている。 As the fibrous filter medium 3a, one having a lower specific gravity than the water to be treated 7 and having a large specific surface area with elasticity, and having a spherical shape or a lump shape similar thereto is used. 具体的には、例えば、適当長さの合成繊維(例えば、80μm径のポリ塩化ビニリデン繊維) Specifically, for example, a synthetic fiber having an appropriate length (for example, a polyvinylidene chloride fiber having a diameter of 80 μm).
製の捲縮加工糸を束にして、その中央部分を結束し、球状(例えば、33mm径)に成形したものが使用される。 A product is used in which a crimped yarn is bundled, the central portion thereof is bound, and the yarn is formed into a spherical shape (for example, a diameter of 33 mm). [0015] Filtration tank 1 1, as shown in FIGS. 1 and 5, [0015] Filtration tank 1 1, as shown in FIGS. 1 and 5,
The filter layer 3 has a cylindrical closed container structure, in which a filter layer 3 having a predetermined thickness formed by laminating a massive fibrous filter medium 3a is formed. As the fibrous filter material 3a, a material having a specific gravity lower than that of the water 7 to be treated and having a large specific surface area having elasticity and having a spherical shape or a mass similar thereto is used. Specifically, for example, a synthetic fiber having an appropriate length (for example, polyvinylidene chloride fiber having a diameter of 80 μm) The filter layer 3 has a cylindrical closed container structure, in which a filter layer 3 having a predetermined thickness formed by laminating a massive fibrous filter medium 3a is formed. As the fibrous filter material 3a, a material having a specific gravity lower than that of The water 7 to be treated and having a large specific surface area having elasticity and having a spherical shape or a mass similar thereof is used. Specifically, for example, a synthetic fiber having an appropriate length (for example, laminateene chloride fiber having a diameter) of 80 μm)
A crimped yarn made into a bundle, a central portion thereof is bound, and a spherical shape (for example, a diameter of 33 mm) is used. A crimped yarn made into a bundle, a central portion thereof is bound, and a spherical shape (for example, a diameter of 33 mm) is used.

【0016】濾過層3は、図1に示す如く、濾過槽1 1
の下部に配設された濾材支持板4 1によって支持されている。 It is supported by disposed filter media supporting plate 4 1 to the bottom of. 濾材支持板4 1は、パンチングメタル,金網等の多孔材で構成されたもので、濾過槽1 1の中心部に水平に位置する円板状の中心部4aと、中心部4aから上方へ傾斜状に延びる截頭円錐筒状の外周部4bとからなる。 The filter medium support plate 4 1 has been configured with punching metal, porous metal net like member, a disk-shaped central portion 4a positioned horizontally in the center of the filtration tank 1 1, inclined from the center 4a upward It is composed of an outer peripheral portion 4b having a cylindrical cone shape extending in a shape. なお、濾材支持板4 1の構成材たる多孔材としては、繊維質濾材3aが透過しないことを条件として、開口率(孔の大きさ)が可及的に大きいものを使用することが好ましい。 As the constituting material serving porous material of the filter medium support plate 4 1, on condition that the fibrous filter medium 3a is not transmitted, it is preferable that the opening ratio (pore size) to use a much as possible greater. また、外周部4bの傾斜角(濾過槽1 1 Further, the inclination angle of the outer peripheral portion 4b (filtration tank 11 1).
の周壁に対する傾斜角)は30°以上としておくことが好ましい。 The inclination angle with respect to the peripheral wall) is preferably 30 ° or more. As shown in FIG. 1, the filtration layer 3 comprises a filtration tank 11. As shown in FIG. 1, the filtration layer 3 a filtration tank 11.
It is supported by disposed filter media supporting plate 4 1 to the bottom of. The filter medium support plate 4 1 has been configured with punching metal, porous metal net like member, a disk-shaped central portion 4a positioned horizontally in the center of the filtration tank 1 1, inclined from the center 4a upward And an outer peripheral portion 4b in the shape of a truncated cone. As the constituting material serving porous material of the filter medium support plate 4 1, on condition that the fibrous filter medium 3a is not transmitted, it is preferable that the opening ratio (pore size) to use a much as possible greater. In addition, the inclination angle of the outer peripheral portion 4b (the filtration tank 11) It is supported by disposed filter media supporting plate 4 1 to the bottom of. The filter medium support plate 4 1 has been configured with punching metal, porous metal net like member, a disk-shaped central portion 4a positioned horizontally in the center of the filtration tank 1 1, inclined from the center 4a upward And an outer peripheral portion 4b in the shape of a truncated cone. As the material serving porous material of the filter medium support plate 4 1, on condition that the fibrous filter medium 3a is In addition, the approach angle of the outer peripheral portion 4b (the filtration tank 11) not transmitted, it is preferred that the opening ratio (pore size) to use a much as possible greater.
Is preferably set to 30 ° or more. Is preferably set to 30 ° or more.

【0017】濾過槽11 の周壁上部及び底壁中央部に
は、図1に示す如く、被処理水7の注入口5及び処理水
7aの取出口6が設けられている。注入口5には、開閉
弁5aを介して、被処理水源から導かれた給水路が接続
されており、取出口6には、開閉弁6aを介して、処理
水使用部へと導かれた送水路が接続されている。
[0017] peripheral wall upper and the bottom wall central portion of the filtration tank 1 1, as shown in FIG. 1, the outlet 6 of the inlet 5 and the treated water 7a of the water to be treated 7 is provided. The inlet 5 is connected to a water supply channel led from the water source to be treated via an on-off valve 5a, and the outlet 6 is led to the treated water using section via an on-off valve 6a. The waterway is connected.

【0018】このように構成された圧力式の濾過槽11
によれば、図1に示す如く、開閉弁5a,6aを開放し
た状態において、被処理水7を注入口5から槽11 内に
連続的に供給すると、被処理水7は濾過層3を高速(例
えば、120m/h)で通過し、この間において、被処
理水7に含まれている汚濁物質は濾過層3全体において
捕捉,除去される。そして、繊維質濾材3aにより汚濁
物質を除去された処理水7aは、濾過層3から濾材支持
板41 を通過して、取出口6から連続的に槽1 1 外へと
取り出される。
The pressure-type filtration tank 1 constructed as described above.1
According to FIG. 1, the on-off valves 5a and 6a are opened as shown in FIG. According to FIG. 1, the on-off valves 5a and 6a are opened as shown in FIG.
In a state where the water to be treated 7 is 1 Within In a state where the water to be treated 7 is 1 Within
When supplied continuously, the water 7 to be treated can cause the filtration layer 3 to flow at a high speed (eg, When supplied continuously, the water 7 to be treated can cause the filtration layer 3 to flow at a high speed (eg,
For example, it passes at 120 m / h). For example, it passes at 120 m / h).
The pollutants contained in the water 7 The pollutants contained in the water 7
Captured and removed. And it is polluted by the fibrous filter medium 3a. Captured and removed. And it is polluted by the fibrous filter medium 3a.
The treated water 7a from which the substance has been removed is supported from the filtration layer 3 by the filter medium. The treated water 7a from which the substance has been removed is supported from the filtration layer 3 by the filter medium.
Board 4 1 Through the outlet 6 and continuously from the tank 1 Board 4 1 Through the outlet 6 and continuously from the tank 1 1 Out 1 Out
Taken out. Taken out.

【0019】本発明に係る洗浄装置2 1は、図1〜図6
に示す如く、濾過槽1 1に仕切板8及び洗浄水給排口9,10を設けると共に、洗浄水循環機構11、洗浄空気噴出機構12及び排気機構を付設してなる。 As shown in, provided with a partition plate 8 and the cleaning water supply and discharge port 9 in the filtration tank 1 1, the washing water circulation mechanism 11, formed by attaching a flushing air ejection mechanism 12 and an exhaust mechanism. The cleaning apparatus 2 1 according to the present invention, FIGS. 1 to 6 The cleaning apparatus 2 1 according to the present invention, FIGS. 1 to 6
As shown in, provided with a partition plate 8 and the cleaning water supply and discharge port 9 in the filtration tank 1 1, the washing water circulation mechanism 11, formed by attaching a flushing air ejection mechanism 12 and an exhaust mechanism. As shown in, provided with a partition plate 8 and the cleaning water supply and discharge port 9 in the filtration tank 1 1, the washing water circulation mechanism 11, formed by attaching a flushing air ejection mechanism 12 and an exhaust mechanism.

【0020】仕切板8は、濾材支持板41 と同一の多孔
材からなる円板であり、濾過層3の表面(上面)から上
方に所定量離間した位置であって給水口5より下位に配
して、水平に張設されている。濾過槽11 内は、濾材支
持板41 及び仕切板8によって、濾過層3が存在する中
間部領域13とその上下部領域14,15とに区画され
ている。
The partition plate 8 is a disk made of filter material support plate 4 1 and the same porous material, lower than the water supply port 5 from the surface of the filtration layer 3 (top) a predetermined amount a location spaced upwardly It is stretched horizontally. The filtration tank 1 1, the filter medium support plate 4 1 and the partition plate 8, and is divided into a middle region 13 in which the filtration layer 3 is present and the upper and lower regions 14, 15.

【0021】洗浄水供給口9は濾過槽11 の周壁下部に
設けられており、開閉弁9aを開放することにより、洗
浄水17を下部領域15から濾過槽11 内に供給するよ
うになっている。洗浄水17としては、清浄水に限ら
ず、多少汚濁した水をも使用することができる。この例
では、供給口9を、開閉弁9aを介して、前記給水路に
分岐接続することにより、洗浄水17として被処理水7
を使用するようにしている。また、洗浄水排出口10は
濾過槽11 の底壁中央部に設けられていて、開閉弁10
aを開放することにより、濾過槽1 1内の洗浄水17を一気に排出するようになっている。 By opening a, it is adapted to stretch discharging washing water 17 of the filtration tank 1 1. 洗浄水排出口10には、適宜の二次処理施設に導かれた排水路が接続されていて、洗浄処理後の洗浄水たる洗浄廃水17aを濾過槽1 1から二次処理施設に返送するようになっている。 A drainage channel led to an appropriate secondary treatment facility is connected to the washing water discharge port 10, and the washing wastewater 17a, which is the washing water after the washing treatment, is returned from the filtration tank 11 to the secondary treatment facility. It has become. The washing water supply port 9 is provided in the peripheral wall lower portion of the filtration tank 1 1, by opening the on-off valve 9a, becomes the washing water 17 from the lower area 15 is supplied to the filtration tank 1 1 ing. The cleaning water 17 is not limited to clean water, but may be somewhat polluted water. In this example, the supply port 9 is branched and connected to the water supply path via an on-off valve 9a, so that the water to be treated 7 The washing water supply port 9 is provided in the peripheral wall lower portion of the filtration tank 1 1, by opening the on-off valve 9a, becomes the washing water 17 from the lower area 15 is supplied to the filtration tank 1 1 ing. The cleaning water 17 is not limited to clean water, but may be somewhat polluted water. In this example, the supply port 9 is filtered and connected to the water supply path via an on-off valve 9a, so that the water to be treated 7
I'm trying to use The cleaning water outlet 10 is provided in the bottom wall central portion of the filtration tank 1 1, the on-off valve 10 I'm trying to use The cleaning water outlet 10 is provided in the bottom wall central portion of the filtration tank 1 1, the on-off valve 10
By opening a, it is adapted to stretch discharging washing water 17 of the filtration tank 1 1. A drainage channel led to an appropriate secondary treatment facility is connected to the washing water discharge port 10 so that washing wastewater 17a, which is washing water after the washing treatment, is returned from the filtration tank 11 to the secondary treatment facility. It has become. By opening a, it is adapted to stretch insulating washing water 17 of the filtration tank 1 1. A drainage channel led to an appropriate secondary treatment facility is connected to the washing water discharge port 10 so that washing wastewater 17a, which is washing water after the washing treatment, is returned from the filtration tank 11 to the secondary treatment facility. It has become.

【0022】洗浄水循環機構11は、濾過槽11 外に配
置された洗浄水循環路18及びこれに介設されたブース
ターポンプ19からなる。洗浄水循環路18は、その上
端部18aを上部領域14に連通接続すると共に、その
下端部18bを下部領域15に連通接続してある。洗浄
水循環路18の下端部18bは、図5(A)(B)に示
す如く、濾過槽11 の内周面に面一状態(A図)又は該
内周面から突出する状態(B図)で、円形をなす当該内
周面に対する接線方向で且つ水平方向に向けて開口され
ている。ブースターポンプ19は、洗浄水循環路18を
介して、洗浄水17の一部17bを上部領域14から槽
1 外に取出し、所定圧に加圧した上で下部領域15へ
と循環供給させるものである。すなわち、加圧された洗
浄水17bを、洗浄水循環路18の下端部18bから濾
過槽11 の内周面に対する接線方向に供給(圧入)させ
ることによって、図5に示す如く、下部領域15に当該
内周面に沿う水平旋回流17cを生ぜしめるようになっ
ている。なお、ブースターポンプ19は公知のものであ
るから、その構成についての説明は省略する。
The washing water circulation mechanism 11 is composed of a filtration tank 1 1 wash water circulation passage disposed outside 18 and booster pump 19 which is interposed thereto. The washing water circulation path 18 has an upper end 18 a communicating with the upper region 14 and a lower end 18 b communicating with the lower region 15. The lower end 18b of the washing water circulation path 18, as shown in FIG. 5 (A) (B), state (B view projecting from the inner peripheral surface flush with (A panel) or the inner peripheral surface of the filtration tank 1 1 ), The opening is open in the tangential direction to the circular inner peripheral surface and in the horizontal direction. Booster pump 19 via the washing water circulation path 18, a portion 17b of the washing water 17 bath 1 1 taken out to the outside from the upper region 14, in which circulates supplied to the lower region 15 on pressurized to a predetermined pressure is there. That is, the pressurized washing water 17b, by supplying tangentially (press-fit) with the inner circumference of the filter tank 1 1 from the lower end 18b of the washing water circulating path 18, as shown in FIG. 5, the lower region 15 A horizontal swirling flow 17c along the inner peripheral surface is generated. In addition, since the booster pump 19 is a publicly known thing, the explanation about the structure is omitted.

【0023】洗浄空気噴出機構12は、濾材支持板41
から垂下させた円筒状の仕切板20とこれによって区画
された下部領域部分15aに配置されたノズル体21と
を具備してなる。仕切板20は、その上端縁部を濾材支
持板41 の下面部であって中心部4aと外周部4bとの
境界部に固着したものであり、その下端縁部は濾過槽1
1 の底壁より所定量上位に位置されている。ノズル体2
1は上方に向けた多数の空気噴出孔を備えたもので、洗
浄空気22を、仕切板20で区画された下部領域部分1
5aからその直上方位の中間部領域部分13aへと集中して吹き込むように構成されている。 It is configured to concentrate and blow from 5a to the intermediate region portion 13a in the direction directly above the 5a. The cleaning air jetting mechanism 12 includes a filter medium support plate 4 1. The cleaning air jetting mechanism 12 includes a filter medium support plate 4 1.
And a nozzle body 21 disposed in a lower region portion 15a partitioned by the cylindrical partition plate 20. The partition plate 20 is obtained by fixing the upper edge portion at the boundary between the central portion 4a and the outer peripheral portion 4b formed on the bottom surface portion of the filter medium support plate 4 1, its lower edge filtration tank 1 And a nozzle body 21 disposed in a lower region portion 15a partitioned by the cylindrical partition plate 20. The partition plate 20 is obtained by fixing the upper edge portion at the boundary between the central portion 4a and the outer peripheral portion 4b formed on the bottom surface portion of the filter medium support plate 4 1, its lower edge filtration tank 1
It is positioned in a predetermined amount higher than the first bottom wall. Nozzle body 2 It is positioned in a predetermined amount higher than the first bottom wall. Nozzle body 2
Numeral 1 is provided with a large number of air ejection holes directed upward, and the cleaning air 22 is supplied to a lower region portion 1 partitioned by a partition plate 20. Numeral 1 is provided with a large number of air ejection holes directed upward, and the cleaning air 22 is supplied to a lower region portion 1 partitioned by a partition plate 20.
It is configured to blow in a concentrated manner from 5a to the intermediate region 13a in the direction directly above it. It is configured to blow in a concentrated manner from 5a to the intermediate region 13a in the direction directly above it.

【0024】排気機構は、濾過槽1 1の上壁中央部及び洗浄水循環路18の上流部に排気口23a,23bを設けてなり、上部領域14及びブースターポンプ19の吸込口側部分からの排気ないし脱気を行なう。両排気口2
3a,23bは合流しており、共通の排気弁23cにより開閉されるようになっている。
The pumping mechanism, exhaust from the suction port side portion of the filtration tank 1 1 of the upper wall central portion and the exhaust port 23a to the upstream portion of the washing water circulation path 18, will be provided 23b, upper region 14 and the booster pump 19 Or degas. Both exhaust ports 2

3a and 23b merge and are opened and closed by a common exhaust valve 23c. 3a and 23b merge and are opened and closed by a common exhaust valve 23c.

【0025】而して、本発明に係る洗浄方法は、上記した洗浄装置2 1を使用して、以下のように実施される。 [0025] In Thus, the cleaning method according to the present invention uses the cleaning apparatus 2 1 described above is performed as follows.

【0026】まず、水張工程を行なう。すなわち、開閉弁5a,6a,10aを閉塞すると共に排気弁23cを開放した上、洗浄水17を洗浄水供給口9から濾過槽1
1に供給して、洗浄水17を上部領域14まで満たし、

開閉弁9aを閉塞することにより、濾過槽1 1内を、図2に示す如く、水面が洗浄水循環路18の上端部18a By closing the on-off valve 9a, the filtration tank 1 1, as shown in FIG. 2, the water level upper portion 18a of the washing water circulation path 18
を超える水張状態に保持する。 Keep in a water-filled state that exceeds. First, a water filling step is performed. That is, the on-off valves 5a, 6a, and 10a are closed and the exhaust valve 23c is opened, and the washing water 17 is supplied from the washing water supply port 9 to the filtration tank 1. First, a water filling step is performed. That is, the on-off valves 5a, 6a, and 10a are closed and the exhaust valve 23c is opened, and the washing water 17 is supplied from the washing water supply port 9 to the filtration. tank 1.
1 to fill the wash water 17 up to the upper region 14, 1 to fill the wash water 17 up to the upper region 14,
By closing the on-off valve 9a, the filtration tank 1 1, as shown in FIG. 2, the water level upper portion 18a of the washing water circulation path 18 By closing the on-off valve 9a, the filtration tank 1 1, as shown in FIG. 2, the water level upper portion 18a of the washing water circulation path 18
And keep it over water. And keep it over water.

【0027】そして、図3に示す如く、ノズル体21か
ら洗浄空気22を噴出させて、洗浄空気22を下部領域
部分15aからその直上方位の中間部領域部分13aに
集中的に吹き込むと共に、ブースターポンプ19を作動
させて、洗浄水17の一部17bを上部領域14から洗
浄水循環路18を介して下部領域15に圧送して、繊維
質濾材3aの洗浄工程を開始する。
Then, as shown in FIG. 3, the cleaning air 22 is blown out from the nozzle body 21, and the cleaning air 22 is intensively blown from the lower region portion 15a to the intermediate region portion 13a directly above the lower region portion 15a. By operating 19, a part 17 b of the washing water 17 is pumped from the upper region 14 to the lower region 15 via the washing water circulation path 18 to start the washing process of the fibrous filter medium 3 a.

【0028】洗浄工程が開始されると、下部領域15で
は、洗浄水17の一部17bがブースターポンプ19に
より加圧された上で、洗浄水循環路18の下端部18b
から濾過槽11 の内周面に対する接線方向に圧送供給さ
れることから、濾過槽11 の内周面に沿う水平旋回流1
7cが形成されることになる。また、下部領域15で
は、ノズル体21からの空気噴出により、洗浄空気22
が噴出されている下部領域部分15aにおいて局部的な
圧力降下が生じることになる。その結果、図3及び図5
に示す如く、下部領域15において下部領域部分15a
への流れ17dが生じて、洗浄水17が仕切板20下から下部領域部分15aへと流れ込み、ノズル体21からの噴出空気によって中間領域部分13aへと上昇する。 The washing water 17 flows from under the partition plate 20 into the lower region portion 15a, and rises to the intermediate region portion 13a by the air ejected from the nozzle body 21.
すなわち、下部領域15における水平旋回流17bとノズル体21による局部的且つ集中的な空気噴出とによって一種のエアリフト効果が発揮され、中間領域部分13 That is, a kind of air lift effect is exhibited by the horizontal swirling flow 17b in the lower region 15 and the local and concentrated air ejection by the nozzle body 21, and the intermediate region portion 13
aに気液混合流体による強力な上昇流17eが生じることになる。 A strong updraft 17e due to the gas-liquid mixture fluid is generated in a. そして、この上昇流17eは、ブースターポンプ19による洗浄水17bの強制循環作用により更に強力なものとなり、継続して発生する。 Then, the rising flow 17e becomes stronger due to the forced circulation action of the washing water 17b by the booster pump 19, and is continuously generated. したがって、濾過層3を構成する繊維質濾材3aが圧力式の高速濾過によって圧密状態にある場合や捕捉汚濁物による密着状態にある場合にも、濾過層3が極めて短時間でほぐされ、 Therefore, even when the fibrous filter medium 3a constituting the filtration layer 3 is in a compacted state by high-speed pressure filtration or in a close contact state due to trapped pollutants, the filtration layer 3 is loosened in an extremely short time.
繊維質濾材3aが容易に浮上する。 The fibrous filter medium 3a floats easily. When the washing step is started, a part 17 b of the washing water 17 is pressurized by the booster pump 19 in the lower region 15 and then the lower end 18 b When the washing step is started, a part 17 b of the washing water 17 is insulating by the booster pump 19 in the lower region 15 and then the lower end 18 b
Horizontal swirling flow along from being pumped supplied tangentially to the inner peripheral surface of the filtration tank 1 1 with respect to the inner peripheral surface of the filter tank 1 1 1 Horizontal swirling flow along from being pumped supplied tangentially to the inner peripheral surface of the filtration tank 1 1 with respect to the inner peripheral surface of the filter tank 1 1 1
7c will be formed. In the lower region 15, the cleaning air 22 is ejected from the nozzle body 21. 7c will be formed. In the lower region 15, the cleaning air 22 is ejected from the nozzle body 21.
Causes a local pressure drop in the lower region portion 15a where the gas is jetted. As a result, FIGS. 3 and 5 Causes a local pressure drop in the lower region portion 15a where the gas is jetted. As a result, FIGS. 3 and 5
As shown in FIG. As shown in FIG.
17d, the washing water 17 flows from below the partition plate 20 into the lower region portion 15a, and rises to the intermediate region portion 13a by the air jetted from the nozzle body 21. 17d, the washing water 17 flows from below the partition plate 20 into the lower region portion 15a, and rises to the intermediate region portion 13a by the air jetted from the nozzle body 21.
That is, the horizontal swirling flow 17b in the lower region 15 and the local and concentrated air ejection by the nozzle body 21 exhibit a kind of air lift effect, and the intermediate region portion 13 That is, the horizontal swirling flow 17b in the lower region 15 and the local and concentrated air ejection by the nozzle body 21 exhibit a kind of air lift effect, and the intermediate region portion 13
A strong upward flow 17e due to the gas-liquid mixed fluid is generated in a. The upward flow 17e becomes stronger due to the forced circulation of the cleaning water 17b by the booster pump 19, and is continuously generated. Therefore, even when the fibrous filter medium 3a constituting the filtration layer 3 is in a compacted state by pressure type high-speed filtration or in a tightly adhered state by trapped contaminants, the filtration layer 3 is loosened in a very short time, A strong upward flow 17e due to the gas-liquid mixed fluid is generated in a. The upward flow 17e becomes stronger due to the forced circulation of the cleaning water 17b by the booster pump 19, and is continuously generated. Therefore, even when the fibrous filter medium 3a preferably the filtration layer 3 is in a compacted state by pressure type high-speed filtration or in a tightly adhered state by trapped contaminants, the filtration layer 3 is loosened in a very short time,
The fibrous filter medium 3a floats easily. The fibrous filter medium 3a floats easily.

【0029】また、中間部領域13においては、ノズル
体21からの空気吹込が行なわれている中間部領域部分
13aと当該空気吹込が行なわれていない中間部領域部
分13bとの間で大きな密度差が生じることになる。し
たがって、上記したエアリフト効果が発揮されることと
も相俟って、中間部領域13においては、図3に示す如
く、前者の中間部領域部分13aを上昇して後者の中間
部領域部分13bを下降する強力な循環流17fが生じ
ることになる。その結果、上記した如くほぐされた繊維
質濾材3aが、循環流17fにより中間部領域13にお
いて均一に混合,攪拌されることになる。
In the intermediate portion 13, a large density difference exists between the intermediate portion 13 a where air is blown from the nozzle body 21 and the intermediate portion 13 b where air is not blown. Will occur. Accordingly, in combination with the above-described effect of the air lift, in the intermediate region 13, as shown in FIG. 3, the former intermediate region portion 13 a is raised and the latter intermediate region region 13 b is lowered. A strong circulating flow 17f is generated. As a result, the fibrous filter medium 3a loosened as described above is uniformly mixed and stirred in the intermediate region 13 by the circulating flow 17f.

【0030】このように、洗浄工程が開始されると、濾
過層3を構成する繊維質濾材3aが短時間でほぐされ、
爾後、ほぐされた繊維質濾材3aが洗浄水17中におい
て混合,攪拌されて、強力に揉み洗いされることにな
り、繊維質濾材3aに捕捉されている汚濁物質が容易に
剥離されることなる。
As described above, when the washing step is started, the fibrous filter medium 3a constituting the filter layer 3 is loosened in a short time,
Thereafter, the loosened fibrous filter medium 3a is mixed and stirred in the washing water 17, and is strongly rubbed and washed, so that the pollutants trapped in the fibrous filter medium 3a are easily peeled off. .

【0031】そして、一定時間経過後、排水工程を行な
う。すなわち、ブースターポンプ19を一旦停止した
上、開閉弁10aを開放して、濾過槽11 内の洗浄水つ
まり繊維質濾材3aから剥離された汚濁物質を含む洗浄
廃水17aを排出口10から一挙に排出する(図4)。
爾後、上記した水張工程から排水工程に至る一連の工程をバッチ的に数回(通常、2〜3回)繰り返すことにより、繊維質濾材3aを完全に洗浄することができるのである。 After that, the fibrous filter medium 3a can be completely washed by repeating the series of steps from the water filling step to the draining step in a batch several times (usually 2 to 3 times). After a certain period of time, a drainage step is performed. That is, after having stopped the booster pump 19 temporarily opens the on-off valve 10a, at once washing waste liquid 17a containing pollutants peeled from the wash water, ie fibrous filter media 3a of the filtration tank 1 1 from the discharge port 10 Discharge (FIG. 4). After a certain period of time, a drainage step is performed. That is, after having stopped the booster pump 19 temporarily opens the on-off valve 10a, at once washing waste liquid 17a containing pollutants peeled from the wash water, ie fibrous filter media 3a of the filtration tank 1 1 from the discharge port 10 Discharge (FIG. 4).
Thereafter, by repeating a series of steps from the water filling step to the draining step several times (normally, two to three times) in a batch, the fibrous filter medium 3a can be completely washed. Therefore, by repeating a series of steps from the water filling step to the draining step several times (normally, two to three times) in a batch, the fibrous filter medium 3a can be completely washed.

【0032】ところで、図1に示す濾過装置を使用し
て、120m/hの濾過速度で濾過水頭が一定値に達す
るまで濾過運転を行った後、上記した方法により繊維質
濾材3aを完全に洗浄した。また、当該濾過装置を使用
して、同一条件で濾過運転を行った後、ブースターポン
プ19を作動させない点を除いて、同一の方法により繊
維質濾材3aを完全に洗浄した。その結果、前者の場合
には圧密化された濾過層3が速やかにほぐれたが、後者
の場合には濾過層がほぐれるまでに5分以上も要した。
また、繊維質濾材3aが完全に洗浄されるまでに要した洗浄水量は、後者の場合には濾過水量の約1%であったのに対し、前者の場合には約0.5%であった。 Further, the amount of washing water required for the fibrous filter medium 3a to be completely washed was about 1% of the amount of filtered water in the latter case, whereas it was about 0.5% in the former case. It was. これらのことから、下部領域15で水平旋回流17cを形成した状態で洗浄水17の一部17bを強制循環させることが、洗浄時間及び洗浄水量の大幅な低減を図り、洗浄効率を向上させる上で、極めて有効且つ重要であることが確認された。 From these facts, forcibly circulating a part 17b of the washing water 17 in a state where the horizontal swirling flow 17c is formed in the lower region 15 greatly reduces the washing time and the amount of the washing water, and improves the washing efficiency. It was confirmed that it is extremely effective and important. By the way, using the filtration device shown in FIG. 1, a filtration operation is performed at a filtration speed of 120 m / h until the filtration head reaches a fixed value, and then the fibrous filter medium 3a is completely washed by the above-described method. did. In addition, after performing a filtration operation under the same conditions using the filtration device, the fibrous filter medium 3a was completely washed by the same method except that the booster pump 19 was not operated. As a result, in the former case, the compacted filter layer 3 was loosened quickly, but in the latter case, it took more than 5 minutes to loosen the filter layer. By the way, using the filtration device shown in FIG. 1, a filtration operation is performed at a filtration speed of 120 m / h until the filtration head reaches a fixed value, and then the fibrous filter medium 3a is completely washed by the above --described method. did. In addition, after performing a filtration operation under the same conditions using the filtration device, the fibrous filter medium 3a was completely washed by the same method except that the booster pump 19 was not operated. As a result, in the former case, the compacted filter layer 3 was loosened quickly, but in the latter case, it took more than 5 minutes to loosen the filter layer.
The amount of washing water required until the fibrous filter medium 3a was completely washed was about 1% of the amount of filtered water in the latter case, but was about 0.5% in the former case. Was. For these reasons, forcibly circulating a portion 17b of the cleaning water 17 in a state where the horizontal swirling flow 17c is formed in the lower region 15 significantly reduces the cleaning time and the amount of cleaning water and improves the cleaning efficiency. It was confirmed to be extremely effective and important. The amount of washing water required until the fibrous filter medium 3a was completely washed was about 1% of the amount of filtered water in the latter case, but was about 0.5% in the former case. Was. For these reasons, forcibly absorbing a portion 17b of the cleaning water 17 in a state where the horizontal swirling flow 17c is formed in the lower region 15 significantly reduces the cleaning time and the amount of cleaning water and improves the cleaning efficiency. It was confirmed to be extremely effective and important.

【0033】また、図6〜図11は第2の実施の形態を示したもので、第1の実施の形態におけると同様に、圧力式の濾過装置に本発明を適用した例に係る。 FIGS. 6 to 11 show a second embodiment, which relates to an example in which the present invention is applied to a pressure-type filtration device as in the first embodiment.

【0034】この実施の形態にあっては、濾過装置が、
次のように構成された圧力式の濾過槽1 2と洗浄装置2
2とからなる。
In this embodiment, the filtering device comprises:
Filtration tank configurations pressure equation as follows: 1 2 and the cleaning device 2
Consists of two .

【0035】すなわち、濾過槽12 は、図6〜図11に
示す如く、濾材支持板42 を円板形状として槽下部に水
平に張設してある点を除いて、前記濾過槽11 と同一構
成をなし且つ同一の濾過機能を発揮するものである。な
お、濾材支持板42 を除く濾過槽12 の各構成部材につ
いては、これに相当する前記濾過槽11 の構成部材と同
一の符号を図6〜図11に付することによって、その説
明は省略することとする。
[0035] That is, the filtration tank 1 2, as shown in FIGS. 6 to 11, except that is stretched horizontally in a bath under the filter medium support plate 4 2 as a disc shape, the filter tank 1 1 And has the same filtering function. Note that the components of the filtration tank 1 2, except for the filter medium support plate 4 2, by subjecting the same sign and the filter tank 1 1 of the constituent members corresponding thereto in FIGS. 6 to 11, their description Is omitted.

【0036】洗浄装置22 は、図6〜図11に示す如
く、仕切板8と洗浄水給排口9,10と洗浄水循環機構
11と洗浄空気噴出機構12と排気機構とを具備するも
のであり、以下に説明する洗浄空気噴出機構12を除い
て、前記洗浄装置21 と同一構成をなすものである。例
えば、洗浄水循環路18の下端部18bは、前記洗浄装
置21 におけると同様に、図10(A)(B)に示す如
く、濾過槽12 の内周面に面一状態(A図)又は該内周
面から突出する状態(B図)で、円形をなす当該内周面
に対する接線方向で且つ水平方向に向けて開口されてい
て、洗浄水17bを当該内周面に沿う水平旋回流17c
をなして下部領域15に供給させうるようになっている。 It can be supplied to the lower region 15. なお、洗浄空気噴出機構12を除く洗浄装置2 2の各構成部材については、これに相当する前記洗浄装置2 The cleaning device 2 corresponding to each component of the cleaning device 2 2 except for the cleaning air ejection mechanism 12
1の構成部材と同一の符号を図6〜図11に付することによって、その説明は省略することとする。 By assigning the same reference numerals as those of the constituent members of FIG. 1 to FIGS. 6 to 11, the description thereof will be omitted. The cleaning apparatus 2 2, as shown in FIGS. 6 to 11, those having a partition plate 8 and the cleaning water supply and discharge port 9 and the cleaning water circulation mechanism 11 and the cleaning air ejection mechanism 12 and an exhaust mechanism There, with the exception of cleaning air jetting mechanism 12 to be described below, in which form the cleaning apparatus 2 1 and the same configuration. For example, the lower end portion 18b of the washing water circulation path 18, the as in the cleaning apparatus 2 1, as shown in FIG. 10 (A) (B), flush with the inner peripheral surface of the filtration tank 1 2 (A panel) Alternatively, in a state of protruding from the inner peripheral surface (FIG. B), the circular swirling flow is opened in the tangential direction to the inner peripheral surface and in the horizontal direction, and the washing water 17b flows along the inner peripheral surface. 17c The cleaning apparatus 2 2, as shown in FIGS. 6 to 11, those having a partition plate 8 and the cleaning water supply and discharge port 9 and the cleaning water circulation mechanism 11 and the cleaning air ejection mechanism 12 and an exhaust mechanism There, For example, the lower end portion 18b of the washing water circulation path 18, the as in the cleaning apparatus 2 with the exception of cleaning air jetting mechanism 12 to be described below, in which form the cleaning apparatus 2 1 and the same configuration. 1, as shown in FIG. 10 (A) (B), flush with the inner peripheral surface of the filtration tank 1 2 (A panel) separately, in a state of similarly from the inner peripheral surface (FIG. B), the circular swirling flow is opened in the tangential direction to the inner peripheral surface and in the horizontal direction, and the washing water 17b flows along the inner peripheral surface. 17c
To be supplied to the lower region 15. Incidentally, the respective components of the cleaning apparatus 2 2 except cleaning air jetting mechanism 12, the cleaning apparatus 2 corresponding thereto To be supplied to the lower region 15. 00, the respective components of the cleaning apparatus 2 2 except cleaning air jetting mechanism 12, the cleaning apparatus 2 corresponding thereof
6 to 11 are given the same reference numerals as those of the first constituent member, and the description thereof will be omitted. 6 to 11 are given the same reference numerals as those of the first constituent member, and the description thereof will be omitted.

【0037】洗浄空気噴出機構12は、図6〜図11に示す如く、濾材支持板4 2の下面部に、その直径線上に配して矩形状の仕切板20aを垂設して、濾材支持板直下の下部領域部分を第1及び第2下部領域部分15b,
15cに区画すると共に、第1及び第2下部領域部分1

5b,15cに第1及び第2ノズル体21a,21bを各別に配置してなる。 The first and second nozzle bodies 21a and 21b are separately arranged in 5b and 15c. 各ノズル体21a,21bは、前記洗浄装置2 1のノズル体21と同様に、上方に向けて洗浄空気22を噴出する多数の空気噴出孔を有するものであり、各下部領域部分15b,15cからその直上方位の各中間部領域部分13c,13dに集中して洗浄空気22を噴出させるものである。 Each nozzle body 21a, 21b, similar to the cleaning device 2 first nozzle member 21, which has a plurality of air ejection holes for ejecting the cleaned air 22 upward, the lower region portion 15b, a 15c The cleaning air 22 is ejected concentrated on the intermediate region portions 13c and 13d in the direction directly above the intermediate portion. The cleaning air jetting mechanism 12, as shown in FIGS. 6 to 11, the lower surface of the filter medium support plate 4 2, and vertically a rectangular partition plate 20a by disposing on its diameter line, the filter media support The first and second lower area portions 15b, The cleaning air jetting mechanism 12, as shown in FIGS. 6 to 11, the lower surface of the filter medium support plate 4 2, and vertically a rectangular partition plate 20a by disposing on its diameter line, the filter media support The first and second lower area portions 15b,
15c and the first and second lower region portions 1 15c and the first and second lower region portions 1
The first and second nozzle bodies 21a and 21b are separately arranged on 5b and 15c. Each nozzle body 21a, 21b, similar to the cleaning device 2 first nozzle member 21, which has a plurality of air ejection holes for ejecting the cleaned air 22 upward, the lower region portion 15b, a 15c The cleaning air 22 is spouted in a concentrated manner at the respective intermediate region portions 13c and 13d in the azimuthal direction. The first and second nozzle bodies 21a and 21b are separately arranged on 5b and 15c. Each nozzle body 21a, 21b, similar to the cleaning device 2 first nozzle member 21, which has a plurality of air ejection holes for ejecting the cleaned air 22 upward , the lower region portion 15b, a 15c The cleaning air 22 is spouted in a concentrated manner at the respective intermediate region portions 13c and 13d in the azimuthal direction.

【0038】而して、第2の実施の形態にあって、本発明に係る洗浄方法は、上記した洗浄装置2 2を使用して、以下のように実施される。 [0038] In Thus, in the second embodiment, the cleaning method according to the present invention uses the cleaning apparatus 2 2 described above is carried out as follows.

【0039】すなわち、第1の実施の形態におけると同
様に、洗浄水17を濾過槽11 に満たし、その水面が洗
浄水循環路18の上端部18aを超える水張状態に保持
する。
[0039] That is, as in the first embodiment, satisfy the washing water 17 in the filtration tank 1 1, the water is held in the water Zhang state exceeding an upper end 18a of the washing water circulation path 18.

【0040】しかる後、図6に示す如く、第1ノズル体
21aから洗浄空気22を噴出させて、洗浄空気22を
第1下部領域部分15bからその直上方位の中間部領域
部分13cに集中的に吹き込むと共に、ブースターポン
プ19を作動させて、洗浄水17の一部17bを上部領
域14から洗浄水循環路18を介して下部領域15に圧
送し、第1洗浄工程を開始する。
Thereafter, as shown in FIG. 6, the cleaning air 22 is jetted from the first nozzle body 21a, and the cleaning air 22 is concentrated from the first lower region portion 15b to the intermediate region portion 13c in a direction immediately above the first lower region portion 15b. At the same time, the booster pump 19 is operated to pump a part 17b of the cleaning water 17 from the upper region 14 to the lower region 15 via the cleaning water circulation path 18 to start the first cleaning step.

【0041】第1洗浄工程においては、第1の実施の形
態におけると同様に、図6及び図10に示す如く、下部
領域15において第1下部領域部分15bへの流れ17
´dが生じて、下部領域15における水平旋回流17b
と第1ノズル体21aによる局部的且つ集中的な空気噴
出とによって一種のエアリフト効果が発揮され、第1中
間領域部分13cに気液混合流体による強力な上昇流1
7´eが生じる。 7'e occurs. そして、この上昇流17´eは、ブースターポンプ19による洗浄水17bの強制循環作用により更に強力なものとなり、継続して発生する。 Then, the rising flow 17'e becomes stronger due to the forced circulation action of the washing water 17b by the booster pump 19, and is continuously generated. したがって、濾過層3を構成する繊維質濾材3aが圧力式の高速濾過によって圧密状態にある場合や捕捉汚濁物による密着状態にある場合にも、濾過層3が極めて短時間でほぐされ、繊維質濾材3aが容易に浮上する。 Therefore, even when the fibrous filter medium 3a constituting the filtration layer 3 is in a compacted state by high-speed pressure filtration or in a close contact state due to trapped pollutants, the filtration layer 3 is loosened in an extremely short time and the fiber is fibrous. The filter medium 3a floats easily. また、中間部領域13においては、第1ノズル体21aからの空気吹込が行なわれている第1中間部領域部分13cと空気吹込が行なわれていない第2中間部領域部分13bとの間で密度差が生じて、図6に示す如く、第1中間部領域部分13cを上昇して第2中間部領域部分13dを下降する強力な循環流17´fが生じることになる。 Further, in the intermediate portion region 13, the density is between the first intermediate portion region portion 13c in which air is blown from the first nozzle body 21a and the second intermediate portion region portion 13b in which air is not blown. A difference is generated, and as shown in FIG. 6, a strong circulating flow 17'f is generated that rises the first intermediate region portion 13c and descends the second intermediate region portion 13d. その結果、上記した如くほぐされた繊維質濾材3aが、循環流17´fにより中間部領域13において均一に混合,攪拌されることになる。 As a result, the fibrous filter medium 3a loosened as described above is uniformly mixed and stirred in the intermediate region 13 by the circulating flow 17'f. In the first cleaning step, as shown in FIGS. 6 and 10, the flow 17 to the first lower region portion 15b in the lower region 15 is performed as in the first embodiment. In the first cleaning step, as shown in FIGS. 6 and 10, the flow 17 to the first lower region portion 15b in the lower region 15 is performed as in the first embodiment.
'D occurs and the horizontal swirling flow 17b in the lower region 15 'D occurs and the horizontal swirling flow 17b in the lower region 15
A kind of air lift effect is exerted by local and intensive air ejection by the first nozzle body 21a, and a strong ascending flow 1 by the gas-liquid mixed fluid flows into the first intermediate region portion 13c. A kind of air lift effect is exerted by local and intensive air ejection by the first nozzle body 21a, and a strong ascending flow 1 by the gas-liquid mixed fluid flows into the first intermediate region portion 13c.
7′e occurs. The upward flow 17'e becomes stronger due to the forced circulation of the cleaning water 17b by the booster pump 19, and is continuously generated. Therefore, even when the fibrous filter medium 3a constituting the filtration layer 3 is in a compacted state by pressure-type high-speed filtration or in a close contact state by trapped contaminants, the filtration layer 3 is loosened in a very short time, The filter medium 3a floats easily. Further, in the intermediate region 13, the density between the first intermediate region portion 13 c where air is blown from the first nozzle body 21 a and the second intermediate region portion 13 b where air is not blown is formed. As a result, as shown in FIG. 6, a strong circulating flow 17'f is generated which rises in the first intermediate region 13c and descends in the second intermediate region 13d. As a result, the fibrous filter medium 3a loosened as described above is uniformly mixed and stirred in the intermediate region 13 7'e occurs. The upward flow 17'e becomes stronger due to the forced circulation of the cleaning water 17b by the booster pump 19, and is continuously generated. Therefore, even when the fibrous filter medium 3a therefore the filtration layer 3 is in a compacted state by pressure-type high-speed filtration or in a close contact state by trapped paritys, the filtration layer 3 is loosened in a very short time, The filter medium 3a floats easily. Further, in the intermediate region 13, the density between the first intermediate region portion 13 c where air is blown from the first nozzle body 21 a and the second intermediate region portion 13 b where air is not blown is formed. As a result, as shown in FIG. 6, a strong filtering flow 17'f is generated which rises in the first intermediate region 13c and descends in the second intermediate region 13d. As a result, the fibrous filter medium 3a loosened as described above is uniformly mixed and stirred in the intermediate region 13 by the circulation flow 17'f. by the circulation flow 17'f.

【0042】そして、第1洗浄工程を一定時間継続した
後、曝気機能を第1ノズル体21aから第2ノズル体2
1bに切り換えて、第2洗浄工程に移行する。すなわ
ち、第1ノズル体21aからの空気噴出を停止すると同
時に、第2ノズル体21bから洗浄空気22を噴出させ
る。このようにすると、第1洗浄工程におけるとは逆
に、図7及び図11に示す如く、下部領域15において
第2下部領域部分15cへの流れ17´´dが生じて、
第2中間領域部分13dに気液混合流体による上昇流1
7´´eが生じると共に、中間部領域13において第2
中間部領域部分13dを上昇して第1中間部領域部分1
3cを下降する循環流17´´fが生じて、繊維質濾材3aが逆方向に循環しつつ混合,攪拌されることになる。 A circulating flow 17 ″ f descending 3c is generated, and the fibrous filter medium 3a is mixed and stirred while circulating in the opposite direction. After the first cleaning step is continued for a predetermined time, the aeration function is changed from the first nozzle body 21a to the second nozzle body 2. After the first cleaning step is continued for a predetermined time, the aeration function is changed from the first nozzle body 21a to the second nozzle body 2.
Switching to 1b, the process proceeds to the second cleaning step. In other words, the cleaning air 22 is jetted from the second nozzle 21b at the same time as the air jetting from the first nozzle 21a is stopped. In this way, the flow 17''d to the second lower region portion 15c occurs in the lower region 15, as shown in FIGS. Switching to 1b, the process proceeds to the second cleaning step. In other words, the cleaning air 22 is jetted from the second nozzle 21b at the same time as the air jetting from the first nozzle 21a is stopped. In this way, the flow 17''d to the second lower region portion 15c occurs in the lower region 15, as shown in FIGS.
Ascending flow 1 due to the gas-liquid mixed fluid in the second intermediate region portion 13d Ascending flow 1 due to the gas-liquid mixed fluid in the second intermediate region portion 13d
7 ″ e occurs and the second region 13 7 ″ e occurs and the second region 13
The first intermediate region portion 1 is raised by moving up the intermediate region portion 13d. The first intermediate region portion 1 is raised by moving up the intermediate region portion 13d.
A circulating flow 17''f descending from 3c is generated, and the fibrous filter medium 3a is mixed and stirred while circulating in the reverse direction. A circulating flow 17''f descending from 3c is generated, and the fibrous filter medium 3a is mixed and stirred while circulating in the reverse direction.

【0043】したがって、濾過層3を構成する繊維質濾材3aが、第1洗浄工程開始後、速やかにほぐされ、第1洗浄工程とこれに引き続く第2洗浄工程とで循環流1
7´e,17´´eの方向を変換することにより、繊維質濾材3aの混合,攪拌がより効果的に行われて、繊維質濾材3aの洗浄が極めて良好に行われることになる。
Accordingly, the fibrous filter medium 3a constituting the filtration layer 3 is loosened immediately after the start of the first washing step, and the circulating flow 1 in the first washing step and the subsequent second washing step.

By changing the directions of 7′e and 17 ″ e, the mixing and stirring of the fibrous filter medium 3a can be performed more effectively, and the fibrous filter medium 3a can be cleaned extremely well. By changing the directions of 7 ′ e and 17 ″ e, the mixing and stirring of the fibrous filter medium 3a can be performed more effectively, and the fibrous filter medium 3a can be cleaned extremely well.

【0044】そして、第2洗浄工程の開始後、一定時間が経過すると、図8及び図9に示す如く、両ノズル21
a,21bから洗浄空気22を噴出させた状態で、排水工程を行なう。すなわち、両ノズル21a,21bにより中間部領域13を全面的に曝気させて、繊維質濾材3
aを均一に分散させた(図8)上で、洗浄廃水17aを排出口10から一挙に排出させて、均一厚さの濾過層3
を形成する(図9)。
After a certain period of time has elapsed after the start of the second cleaning step, as shown in FIGS.

The draining step is performed in a state where the cleaning air 22 is jetted from the nozzles 21a and 21b. That is, the intermediate region 13 is completely aerated by the two nozzles 21a and 21b, and the fibrous filter medium 3 The draining step is performed in a state where the cleaning air 22 is jetted from the nozzles 21a and 21b. That is, the intermediate region 13 is completely aerated by the two nozzles 21a and 21b, and the fibrous filter medium 3
a is uniformly dispersed (FIG. 8), and the washing wastewater 17a is discharged from the discharge port 10 at a stroke, and the filtration layer 3 having a uniform thickness is discharged. a is uniformly dispersed (FIG. 8), and the washing wastewater 17a is discharged from the discharge port 10 at a stroke, and the filtration layer 3 having a uniform thickness is discharged.
Is formed (FIG. 9). Is formed (FIG. 9).

【0045】ところで、この実施の形態においても、第1の実施の形態におけると同様に、上記した水張工程から排水工程に至る一連の工程をバッチ的に数回(通常、
2〜3回)繰り返すが、通常、両ノズル21a,21b

による全面曝気は最終の排水工程においてのみ行うことになる。 Full aeration will be done only in the final drainage process. また、最終の排水工程が終了した後において当該全面曝気を行うことによっても、層厚さの均一化を実現できる。 Further, the layer thickness can be made uniform by performing the entire aeration after the final drainage process is completed. By the way, in this embodiment, similarly to the first embodiment, a series of steps from the water filling step to the draining step described above is performed several times in a batch (usually, By the way, in this embodiment, similarly to the first embodiment, a series of steps from the water filling step to the draining step described above is performed several times in a batch (usually,
2 to 3 times), but usually both nozzles 21a, 21b 2 to 3 times), but usually both nozzles 21a, 21b
Will be performed only in the final drainage process. Also, by performing the entire surface aeration after the final drainage step is completed, the layer thickness can be made uniform. Will be performed only in the final drainage process. Also, by performing the entire surface aeration after the final drainage step is completed, the layer thickness can be made uniform.

【0046】なお、本発明は、上記した各実施の形態に
限定されるものではなく、本発明の基本原理を逸脱しな
い範囲において、適宜に改良,変更することができる。
例えば、本発明は、30m/hを超えるような高速濾過
を行うことにより濾過層3が甚だしく圧密化される場合
(例えば、圧力式の濾過装置を使用する場合)におい
て、特に好適するものであるが、このような場合以外に
おいても適用することができ、上記したと同様の効果的
な洗浄を行うことができる。
It should be noted that the present invention is not limited to the above-described embodiments, and can be appropriately improved and changed without departing from the basic principle of the present invention.
For example, the present invention is particularly suitable when the filtration layer 3 is extremely compacted by performing high-speed filtration at a speed exceeding 30 m / h (for example, when a pressure-type filtration device is used). However, the present invention can be applied to cases other than such cases, and the same effective cleaning as described above can be performed. For example, the present invention is particularly suitable when the filtration layer 3 is extremely compacted by performing high-speed filtration at a speed exceeding 30 m / h (for example, when a pressure-type filtration device is used). However, the present invention can be applied to cases other than such cases, and the same effective cleaning as described above can be performed.

【0047】 [0047]

【発明の効果】以上の説明から容易に理解されるよう
に、本発明によれば、速度水頭により濾過層が甚だしく
圧密化されるような高速濾過装置(例えば、濾過速度が
30m/hを超えるような濾過装置)においても、濾過
層を速やかにほぐし得て、洗浄水量及び洗浄時間を大幅
に低減しつつ、繊維質濾材の洗浄を効果的に行なうこと
ができ、濾過効率を大幅に向上させることができる。
As will be easily understood from the above description, according to the present invention, a high-speed filtration device (for example, a filtration speed exceeding 30 m / h) in which the filtration layer is extremely compacted by the velocity head. In such a filtration device, the filtration layer can be quickly loosened, and the amount of washing water and the washing time can be significantly reduced, and the fibrous filter medium can be effectively washed, thereby greatly improving the filtration efficiency. be able to.

【図面の簡単な説明】 [Brief description of the drawings]

【図1】本発明に係る洗浄装置の第1の実施の形態を示す縦断正面図である。 FIG. 1 is a vertical sectional front view showing a first embodiment of a cleaning apparatus according to the present invention.

【図2】水張工程を示す図1相当図である。 FIG. 2 is a view corresponding to FIG. 1 showing a water filling process.

【図3】洗浄工程を示す図1相当図である。 FIG. 3 is a view corresponding to FIG. 1 showing a cleaning step.

【図4】排水工程を示す図1相当図である。 FIG. 4 is a view corresponding to FIG. 1 showing a drainage step.

【図5】図3のV−V線に沿う要部の横断底面図である。 FIG. 5 is a cross-sectional bottom view of a main part along the line VV in FIG. 3;

【図6】本発明に係る洗浄装置の第2の実施の形態を示す縦断正面図であり、洗浄工程を示している。 FIG. 6 is a vertical sectional front view showing a second embodiment of the cleaning apparatus according to the present invention, showing a cleaning step.

【図7】図6と異なる状態の洗浄工程を示す図6相当図である。 FIG. 7 is a diagram corresponding to FIG. 6, showing a cleaning process in a state different from FIG. 6;

【図8】排水工程を示す図6相当図である。 FIG. 8 is a diagram corresponding to FIG. 6, showing a drainage process.

【図9】洗浄完了状態を示す図6相当図である。 FIG. 9 is a diagram corresponding to FIG. 6, showing a cleaning completed state.

【図10】図6のX−X線に沿う要部の横断底面図である。 FIG. 10 is a cross-sectional bottom view of a main part taken along line XX of FIG. 6;

【図11】図7のXI−XI線に沿う要部の横断底面図である。 11 is a cross-sectional bottom view of a main part taken along line XI-XI in FIG. 7;

【符号の説明】 [Explanation of symbols]

1 ,1 2 …濾過槽、2 1 ,2 2 …洗浄装置、3…濾過層、3a…繊維質濾材、4 1 ,4 2 …濾材支持板、7…
被処理水、7a…処理水、8…仕切板、11…洗浄水循環機構、12…洗浄空気噴出機構、13…中間部領域、
14…上部領域、15…下部領域、17…洗浄水、17
b…洗浄水の一部、17c…水平旋回流、21,21

a,21b…ノズル体、22…洗浄空気。 a, 21b ... Nozzle body, 22 ... Cleaning air. 1 1, 1 2 ... filtration tank, 2 1, 2 2 ... cleaning device, 3 ... filtration layer, 3a ... fiber filter medium, 4 1, 4 2 ... medium support plate 7 ... 1 1, 1 2 ... filtration tank, 2 1, 2 2 ... cleaning device, 3 ... filtration layer, 3a ... fiber filter medium, 4 1, 4 2 ... medium support plate 7. ..
Water to be treated, 7a: treated water, 8: partition plate, 11: washing water circulation mechanism, 12: washing air jetting mechanism, 13: middle area, Water to be treated, 7a: treated water, 8: partition plate, 11: washing water circulation mechanism, 12: washing air jetting mechanism, 13: middle area,
14 ... upper area, 15 ... lower area, 17 ... washing water, 17 14 ... upper area, 15 ... lower area, 17 ... washing water, 17
b: a part of washing water, 17c: horizontal swirling flow, 21, 21 b: a part of washing water, 17c: horizontal swirling flow, 21, 21
a, 21b: nozzle body, 22: cleaning air. a, 21b: nozzle body, 22: cleaning air.

───────────────────────────────────────────────────── フロントページの続き (72)発明者 越田 俊雄 大阪府大阪市福島区野田5丁目17番22号 株式会社エス・エル内 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Toshio Koshida 5-17-22 Noda, Fukushima-ku, Osaka-shi, Osaka

Claims (2)

    【特許請求の範囲】[Claims]
  1. 【請求項1】 多孔材製の濾材支持板上に塊状の繊維質
    濾材を積層支持させることによって、濾過槽内に被処理
    水が下降通過する濾過層を形成してなる濾過装置におい
    て、 濾過層の所定量上方位に濾材支持板と同様の多孔材から
    なる仕切板を配設して、この仕切板及び前記濾材支持板
    により、濾過槽内を濾過層が存在する中間部領域とその
    上下部領域とに区画しておき、 濾過槽に満たされた洗浄水の一部を、上部領域から槽外
    に取り出して加圧した上で濾過槽の内周面に沿う水平旋
    回流をなして下部領域に循環供給させると共に、洗浄空
    気を下部領域の一部からその直上方位の中間部領域部分
    に集中して噴出させるようにすることを特徴とする濾過
    装置における繊維質濾材の洗浄方法。
    1. A filter device comprising: a filter material support plate made of porous material; and a mass of fibrous filter media laminated and supported on the filter media support plate to form a filter layer through which water to be treated passes downward in a filtration tank. A partition plate made of the same porous material as the filter medium support plate is disposed in a predetermined amount in the upward direction, and the partition plate and the filter medium support plate allow the inside of the filtration tank to have an intermediate region where a filter layer is present and upper and lower portions thereof. A part of the washing water filled in the filtration tank is taken out of the tank from the upper area, pressurized, and then formed into a horizontal swirling flow along the inner peripheral surface of the filtration tank. Washing the fibrous filter medium in the filtration device, wherein the washing air is circulated and supplied, and the washing air is intensively jetted from a part of the lower area to an intermediate area part just above the lower area.
  2. 【請求項2】 多孔材製の濾材支持板上に塊状の繊維質
    濾材を積層支持させることによって、濾過槽内に被処理
    水が下降通過する濾過層を形成してなる濾過装置におい
    て、 濾材支持板と同様の多孔材からなり、濾過層の所定量上
    方位に配設されて、濾過槽内を、濾材支持板と共に、濾
    過層が存在する中間部領域とその上下部領域とに区画す
    る仕切板と、 濾過槽に満たされた洗浄水の一部を上部領域から槽外に
    取り出して加圧した上で濾過槽の内周面に沿う水平旋回
    流をなして下部領域に循環供給させる洗浄水循環機構
    と、 洗浄空気を下部領域の一部からその直上方位の中間部領
    域部分に集中して噴出させる洗浄空気噴出機構とを具備
    することを特徴とする濾過装置における繊維質濾材の洗
    浄装置。
    2. A filter device comprising a filter medium support plate made of a porous material and a massive fibrous filter medium laminated and supported thereon to form a filtration layer through which water to be treated passes downward in a filtration tank. A partition made of the same porous material as the plate and arranged in a predetermined direction upward of the filter layer, and partitions the inside of the filter tank, together with the filter medium support plate, into an intermediate region where the filter layer is present and upper and lower regions thereof. A plate and a part of the washing water filled in the filter tank are taken out of the tank from the upper region, pressurized, and then circulated and supplied to the lower region in a horizontal swirling flow along the inner peripheral surface of the filter tank. A cleaning device for a fibrous filter medium in a filtration device, comprising: a mechanism; and a cleaning air jetting mechanism for concentrating and jetting cleaning air from a part of a lower region to an intermediate region in a direction directly above the lower region.
JP9037297A 1997-02-21 1997-02-21 Method and device for washing fibrous filter medium in filter Granted JPH10230106A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9037297A JPH10230106A (en) 1997-02-21 1997-02-21 Method and device for washing fibrous filter medium in filter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9037297A JPH10230106A (en) 1997-02-21 1997-02-21 Method and device for washing fibrous filter medium in filter

Publications (1)

Publication Number Publication Date
JPH10230106A true JPH10230106A (en) 1998-09-02

Family

ID=12493778

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9037297A Granted JPH10230106A (en) 1997-02-21 1997-02-21 Method and device for washing fibrous filter medium in filter

Country Status (1)

Country Link
JP (1) JPH10230106A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007307549A (en) * 2006-04-21 2007-11-29 Maezawa Ind Inc Filtration device, and waste water treatment apparatus using this filtration device
JP2009268443A (en) * 2008-05-12 2009-11-19 Akechi Ceramics Co Ltd Sterile filtration device of nutritious liquid
JP2011240342A (en) * 2006-04-21 2011-12-01 Maezawa Ind Inc Wastewater treatment apparatus

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007307549A (en) * 2006-04-21 2007-11-29 Maezawa Ind Inc Filtration device, and waste water treatment apparatus using this filtration device
JP2011240342A (en) * 2006-04-21 2011-12-01 Maezawa Ind Inc Wastewater treatment apparatus
JP2011245483A (en) * 2006-04-21 2011-12-08 Maezawa Ind Inc Filtration device
JP2009268443A (en) * 2008-05-12 2009-11-19 Akechi Ceramics Co Ltd Sterile filtration device of nutritious liquid

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