JP2010104932A - Air diffuser - Google Patents

Air diffuser Download PDF

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Publication number
JP2010104932A
JP2010104932A JP2008280633A JP2008280633A JP2010104932A JP 2010104932 A JP2010104932 A JP 2010104932A JP 2008280633 A JP2008280633 A JP 2008280633A JP 2008280633 A JP2008280633 A JP 2008280633A JP 2010104932 A JP2010104932 A JP 2010104932A
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air
diffuser
pipe
air diffuser
hole
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Yoshinori Inasumi
義憲 稲住
Yasunari Nanba
康成 難波
Kenji Sakai
憲司 酒井
Kenji Nakahigashi
賢司 中東
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Toray Industries Inc
Suido Kiko Kaisha Ltd
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Toray Industries Inc
Suido Kiko Kaisha Ltd
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Priority to JP2008280633A priority Critical patent/JP2010104932A/en
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Abstract

<P>PROBLEM TO BE SOLVED: To control the blockage of air diffusion holes due to sludge in relation to an air diffuser. <P>SOLUTION: In the air diffuser, diffused air holes (6a) are arranged alternatively to the cross line (X1) of an aeration tube (6) and a vertical plane passing through the cross-section central line (X0) of the aeration tube (6). Since aeration holes (6a) are present on either side of the aeration tube (6), air bubbles dispersed on both sides of the aeration tube (6) uprear, thus preventing deviation of aeration. Though airborne droplets of raw water intruding from the aeration holes (6a) slide down on the inner wall of the aeration tube (6) and stop at the lowest part of the aeration tube (6), sludge in raw water hardly blocks the aeration holes (6a) since the aeration holes (6a) are not situated at the lowest part of the aeration tube (6). <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、散気装置に関し、さらに詳しくは、汚泥による散気穴の閉塞を、実施し易い簡単な構成により、抑制することが出来る散気装置に関する。   The present invention relates to an air diffuser, and more particularly to an air diffuser capable of suppressing the obstruction of air diffuser holes by sludge with a simple configuration that is easy to implement.

従来、直径５〜１０ｍｍの散気穴を１００〜２００ｍｍピッチで散気管に複数設け、散気穴からの空気散気速度を１０［ｍ／秒］以上にする散気装置が知られている（例えば、特許文献１参照。）。
特開平１１−２８４６３号公報（［０００６］） 2. Description of the Related Art Conventionally, there is known an air diffuser in which a plurality of air diffuser holes with a diameter of 5 to 10 mm are provided in a diffuser pipe at a pitch of 100 to 200 mm, and an air diffuser speed from the air diffuser holes is 10 [m / sec] or more ( For example, see Patent Document 1.)
JP-A-11-28463 ([0006])

上記従来の散気装置では、原水が散気穴から散気管内に侵入し、原水中の汚泥が散気管内で乾燥して散気穴を閉塞する問題点があった。
これに対して、長さ１０［ｍｍ］以上の噴出パイプを各散気穴に取り付けることが提案されているが、構成が複雑になり、実施し難い問題点がある。
そこで、本発明の目的は、汚泥による散気穴の閉塞を、実施し易い簡単な構成により、抑制することが出来る散気装置を提供することにある。 The conventional diffuser has a problem that raw water enters the diffuser pipe through the diffuser hole, and sludge in the raw water dries in the diffuser pipe to block the diffuser hole.
On the other hand, it has been proposed to attach an ejection pipe having a length of 10 [mm] or more to each diffuser hole, but there is a problem that the configuration becomes complicated and difficult to implement.
Therefore, an object of the present invention is to provide an air diffuser that can suppress the obstruction of the air diffuser hole by sludge with a simple configuration that is easy to implement.

第１の観点では、本発明は、原水（Ｓ）をろ過するろ過エレメント（２）と、原水（Ｓ）中に気泡を放出するため散気管（６）と、前記散気管（６）の散気穴（６ａ）から散気する空気を供給する空気供給手段（５０）とを備えた散気装置において、前記散気管（６）の断面中心線（Ｘ０）を通る鉛直面と前記散気管（６）の交差線（Ｘ１）に対して前記散気穴（６ａ）を千鳥に配置したことを特徴とする散気装置を提供する。
上記第１の観点による散気装置では、散気穴（６ａ）を千鳥に配置することにより、施工精度が多少悪くても、散気管（６）の左右に散気穴（６ａ）が存在するために、散気管（６）の両側に分散して気泡が上がり、散気の片寄りを防ぐことが出来る。また、散気穴（６ａ）を千鳥に配置することにより、散気管（６）内に汚泥が侵入し、散気管（６）内壁を汚泥が滑り落ちる際、他の散気孔（６ａ）を塞がない効果がある。 In the first aspect, the present invention provides a filter element (2) for filtering raw water (S), a diffuser pipe (6) for releasing bubbles in the raw water (S), and a diffuser of the diffuser pipe (6). In the air diffuser comprising an air supply means (50) for supplying air diffused from the air holes (6a), a vertical plane passing through the cross-sectional center line (X0) of the air diffuser pipe (6) and the air diffuser pipe ( The air diffuser is characterized in that the air diffuser holes (6a) are arranged in a staggered manner with respect to the cross line (X1) of 6).
In the air diffuser according to the first aspect, by arranging the air diffuser holes (6a) in a staggered manner, the air diffuser holes (6a) exist on the left and right of the air diffuser pipe (6) even if the construction accuracy is somewhat poor. Therefore, the bubbles are dispersed on both sides of the air diffuser (6) and the air bubbles can be prevented from being displaced. Further, by arranging the diffuser holes (6a) in a staggered manner, when sludge enters the diffuser pipe (6) and the sludge slides down the inner wall of the diffuser pipe (6), the other diffuser holes (6a) are blocked. There is no effect.

第２の観点では、本発明は、原水（Ｓ）をろ過するろ過エレメント（２）と、原水（Ｓ）中に気泡を放出するため散気管（６）と、前記散気管（６）の散気穴（６ａ）から散気する空気を供給する空気供給手段（５０）とを備えた散気装置において、前記散気管（６）の断面中心線（Ｘ０）と直交し且つ前記散気穴（６ａ）を通る平面上で前記断面中心線（Ｘ０）から下ろした鉛直線（Ｙ）と前記断面中心線（Ｘ０）と前記散気穴（６ａ）を結ぶ直線（Ｌ）とが成す角度θが１０度から４０度の角度範囲内にあることを特徴とする散気装置を提供する。
上記第２の観点による散気装置では、図４の（ａ）に示すように散気穴６ａから侵入した原水Ｓの飛沫が、図４の（ｂ）に示すように散気管６の内壁を滑り落ち、図４の（ｃ）に示すように散気管６の最下部に止まるが、散気穴６ａが散気管６の最下部に位置していないため、原水Ｓ中の汚泥が散気穴６ａを閉塞し難くなる。すなわち、汚泥による散気穴６ａの閉塞を、実施し易い簡単な構成により（噴出パイプが不要）、抑制することが出来る。
これに対して、従来の散気装置では、図７に示すように散気穴６ａ’が散気管６’の最下部にあったため、図７の（ａ）に示すように散気穴６ａ’から侵入した原水Ｓの飛沫が、図７の（ｂ）に示すように散気管６’の内壁を滑り落ち、図７の（ｃ）に示すように散気穴６ａ’の上に止まるため、原水Ｓ中の汚泥が散気穴６ａ’を閉塞し易くなる。 In a second aspect, the present invention provides a filter element (2) for filtering raw water (S), a diffuser pipe (6) for releasing bubbles in the raw water (S), and a diffuser of the diffuser pipe (6). In the air diffuser comprising an air supply means (50) for supplying air diffused from the air holes (6a), the air diffuser is orthogonal to the cross-sectional center line (X0) of the air diffuser pipe (6) and An angle θ formed by a vertical line (Y) dropped from the cross-sectional center line (X0) on a plane passing through 6a) and a straight line (L) connecting the cross-sectional center line (X0) and the diffuser hole (6a) is An air diffuser is provided that is within an angle range of 10 degrees to 40 degrees.
In the air diffusing device according to the second aspect, the splash of the raw water S that has entered from the air diffusing holes 6a as shown in FIG. 4 (a) causes the inner wall of the air diffusing pipe 6 as shown in FIG. 4 (b). As shown in FIG. 4 (c), it slides down and stops at the lowermost part of the air diffuser 6. However, since the air diffuser 6a is not located at the lowermost part of the air diffuser 6, sludge in the raw water S is diffused. It becomes difficult to block 6a. That is, blockage of the air diffusion hole 6a due to sludge can be suppressed with a simple configuration that is easy to implement (an ejection pipe is unnecessary).
On the other hand, in the conventional air diffuser, since the air diffuser hole 6a ′ is at the lowermost part of the air diffuser tube 6 ′ as shown in FIG. 7, the air diffuser hole 6a ′ as shown in FIG. Since the splash of the raw water S that has entered from the inside slides down the inner wall of the air diffusing pipe 6 ′ as shown in FIG. 7B, and stops on the air diffusing hole 6a ′ as shown in FIG. Sludge in the raw water S is likely to block the aeration holes 6a ′.

第３の観点では、本発明は、前記第１または第２の観点による散気装置において、前記散気穴（６ａ）からの空気散気速度を大気圧力換算で１穴当たり１７．５［ｍ／sec］以上、２５［ｍ／sec］以下とすることを特徴とする散気装置を提供する。
上記第３の観点による散気装置では、図５に示すように散気穴（６ａ）から散気管（６）内への浸水量を格段に抑えることが出来るので、汚泥による散気穴６ａの閉塞を抑制することが出来る。 In a third aspect, the present invention provides the air diffuser according to the first or second aspect, wherein the air diffusion speed from the air diffusion hole (6a) is 17.5 [m per hole in terms of atmospheric pressure. / Sec] and 25 [m / sec] or less.
In the air diffuser according to the third aspect, as shown in FIG. 5, the amount of water infiltrated from the air diffuser hole (6a) into the air diffuser pipe (6) can be remarkably suppressed. Blockage can be suppressed.

第４の観点では、本発明は、前記第１から第３のいずれかの観点による散気装置において、前記散気管（６）への空気供給側と反対側の前記散気管（６）の端部を下方に曲げ且つ端面を開口（６ｂ）にしたことを特徴とする散気装置を提供する。
上記第４の観点による散気装置では、図６に示すように散気管（６）内に溜まった汚泥を散気管（６）の開口（６ｂ）から排出することが可能になる。 In a fourth aspect, the present invention provides the air diffuser according to any one of the first to third aspects, wherein the end of the air diffuser pipe (6) opposite to the air supply side to the air diffuser pipe (6) is provided. An air diffuser characterized in that the portion is bent downward and the end face is an opening (6b) is provided.
In the air diffuser according to the fourth aspect, the sludge accumulated in the air diffuser (6) can be discharged from the opening (6b) of the air diffuser (6) as shown in FIG.

第５の観点では、本発明は、前記第４の観点による散気装置において、設置間隔および設置本数を変更可能に複数の前記散気管（６）を設置したことを特徴とする散気装置を提供する。
上記第５の観点による散気装置では、現地の状況に応じて、ろ過エレメント間にケーキが付着し難いように且つ散気を均等に行えるように、散気管の設置間隔と設置本数とを容易に最適化できる。 In a fifth aspect, the present invention provides an air diffuser characterized in that, in the air diffuser according to the fourth aspect, a plurality of the air diffusers (6) are installed so that the installation interval and the number of installation can be changed. provide.
In the air diffuser according to the fifth aspect, according to the local situation, the interval between the air diffusers and the number of the air diffusers can be easily installed so that the cake does not easily adhere between the filter elements and the air can be evenly diffused. Can be optimized.

本発明の散気装置によれば、汚泥による散気穴の閉塞を、実施し易い簡単な構成により、抑制することが出来る。   According to the air diffusing device of the present invention, it is possible to suppress the blockage of the air diffusing holes due to sludge with a simple configuration that is easy to implement.

以下、図に示す実施の形態により本発明をさらに詳細に説明する。なお、これにより本発明が限定されるものではない。   Hereinafter, the present invention will be described in more detail with reference to embodiments shown in the drawings. Note that the present invention is not limited thereby.

図１は、実施例１に係る散気装置を含む膜ろ過装置１の斜視図である。
この膜ろ過装置１は、例えば１００枚の浸漬膜２と、各浸漬膜２からのろ過水を集めるための集水管３と、各浸漬膜２のろ過水出口と集水管３のろ過水入口とをそれぞれ連結するろ過水管４と、集水管３にろ過水Ｄを集めるためのポンプ５と、浸漬膜２の下方に水平に設置された散気管６と、方向を９０゜変える屈曲管７と、屈曲管７により散気管６に連結され垂直方向に立ち上がり原水Ｓ外に出て原水Ｓ外から散気管６に空気を送り込むための送気管８と、空気口９ａおよびビット口９ｂを有するｙ字管９と、送気管８に空気を送り込むブロワ５０とを具備している。
散気管６には、複数の散気穴６ａが設けられている。また、屈曲管７と反対側の散気管６の端部は下方に曲げられ且つ端面が開口６ｂになっている。
浸漬膜２などは、原水Ｓに浸かっている。 FIG. 1 is a perspective view of a membrane filtration device 1 including an air diffuser according to a first embodiment.
The membrane filtration device 1 includes, for example, 100 immersion membranes 2, a water collection pipe 3 for collecting filtrate water from each immersion membrane 2, a filtrate water outlet of each immersion membrane 2, and a filtrate water inlet of the water collection pipe 3. Are connected to each other, a filtered water pipe 4 for collecting the filtered water D in the water collecting pipe 3, a diffuser pipe 6 installed horizontally below the immersion membrane 2, and a bent pipe 7 for changing the direction by 90 °, A y-tube having an air pipe 9a and a bit port 9b, which is connected to the diffuser pipe 6 by a bent pipe 7 and rises in the vertical direction to go out of the raw water S and send air from the raw water S to the diffuser pipe 6. 9 and a blower 50 for feeding air into the air pipe 8.
The diffuser tube 6 is provided with a plurality of diffuser holes 6a. Further, the end of the air diffusing tube 6 on the side opposite to the bent tube 7 is bent downward and the end surface is an opening 6b.
The immersion film 2 and the like are immersed in the raw water S.

図２は、散気管６の底面図である。また、図３は、図２のＡ−Ａ’断面図である。
散気管６の断面中心線Ｘ０と直交し且つ散気穴６ａを通る平面上で断面中心線Ｘ０から下ろした鉛直線Ｙと断面中心線Ｘ０と散気穴６ａを結ぶ直線Ｌとが成す角度θは、１０度から４０度の角度範囲内にある。
散気穴６ａは、散気管６の断面中心線Ｘ０を通る鉛直面と散気管６の交差線Ｘ１に対して、千鳥に配置してある。 FIG. 2 is a bottom view of the air diffuser 6. 3 is a cross-sectional view taken along the line AA ′ of FIG.
An angle θ formed by a vertical line Y perpendicular to the cross-sectional center line X0 of the air diffuser 6 and passing through the air diffuser hole 6a and a straight line L connecting the cross-sectional center line X0 and the air diffuser hole 6a. Is within an angular range of 10 to 40 degrees.
The diffuser holes 6 a are arranged in a staggered manner with respect to a vertical plane passing through the cross-sectional center line X0 of the diffuser tube 6 and the intersection line X1 of the diffuser tube 6.

具体例を示すと、散気管６は、内径４０ｍｍのＰＰ管である。散気穴６ａの直径は４ｍｍであり、ピッチは３０ｍｍであり、散気穴６ａの個数は９０個であり、θ＝１０度である。   As a specific example, the air diffusing tube 6 is a PP tube having an inner diameter of 40 mm. The diameter of the air holes 6a is 4 mm, the pitch is 30 mm, the number of air holes 6a is 90, and θ = 10 degrees.

図４の（ａ）に示すように、運転中、原水Ｓの飛沫が、散気穴６ａから侵入してくる。この飛沫は、図４の（ｂ）に示すように散気管６の内壁を滑り落ち、図４の（ｃ）に示すように散気管６の最下部に止まる。そして、乾燥し、汚泥が残るが、散気管６の最下部に散気穴６ａが位置していないため、散気穴６ａは閉塞し難い。   As shown to (a) of FIG. 4, the splash of the raw | natural water S penetrate | invades from the diffuser hole 6a during a driving | operation. This splash slides down the inner wall of the air diffuser 6 as shown in FIG. 4B, and stops at the lowermost part of the air diffuser 6 as shown in FIG. And although it dries and sludge remains, since the diffuser hole 6a is not located in the lowest part of the diffuser tube 6, the diffuser hole 6a is hard to block | close.

図５は、散気穴６ａからの空気散気速度に対する、散気穴６ａから散気管６内への浸水量を示すグラフである。
十分な散気のためには１０［ｍ／sec］以上とすることが好ましいが、１７．５［ｍ／sec］までは浸水量が多い。つまり、散気管６内に入る汚泥の量が多い。従って、１７．５［ｍ／sec］以上とすべきである。
一方、２５［ｍ／sec］より大きくしても浸水量は変化せず、その割にブロワ５０の負担が大きくなる。
そこで、１７．５［ｍ／sec］以上、２５［ｍ／sec］以下とすべきである。 FIG. 5 is a graph showing the amount of water infiltrated from the air diffuser hole 6a into the air diffuser pipe 6 with respect to the air diffused velocity from the air diffuser hole 6a.
Although it is preferable to set it to 10 [m / sec] or more for sufficient air diffusion, the amount of water immersion is large up to 17.5 [m / sec]. That is, the amount of sludge that enters the diffuser 6 is large. Therefore, it should be 17.5 [m / sec] or more.
On the other hand, even if it is larger than 25 [m / sec], the amount of water immersion does not change, and the burden on the blower 50 increases for that.
Therefore, it should be 17.5 [m / sec] or more and 25 [m / sec] or less.

実施例１に係る散気装置によれば、汚泥による散気穴６ａの閉塞を抑制することが出来る上に、各散気穴６ａに噴出パイプを取り付ける必要がなく、実施し易い簡単な構成となる。   According to the air diffuser according to the first embodiment, it is possible to suppress the blockage of the air diffuser hole 6a due to sludge, and it is not necessary to attach an ejection pipe to each air diffuser hole 6a, and the simple configuration is easy to implement. Become.

それでも運転時間が長くなると、散気管６内に多くの汚泥が溜まってくる。
その場合、例えば図６に示すように、フレキシブルシャフト２０の先端に付いたビット１０を、ビット口９ｂから入れ、ｙ字管９，送気管８および屈曲管７を通し、散気管６まで挿入する。そして、電気ドリル３０で、フレキシブルシャフト２０を介してビット１０を回転し、ビット１０に振子運動させ、散気管６内の汚泥を掻き落としながら、散気管６の端面開口６ｂより汚泥Ｍを排出する。なお、本作業は、圧力水を用いた洗浄方法などでもよい。 Still, when the operation time becomes long, a large amount of sludge accumulates in the air diffuser 6.
In that case, for example, as shown in FIG. 6, the bit 10 attached to the tip of the flexible shaft 20 is inserted from the bit port 9 b, inserted through the y-shaped tube 9, the air supply tube 8, and the bent tube 7 to the diffuser tube 6. . Then, the electric drill 30 rotates the bit 10 through the flexible shaft 20 and causes the bit 10 to perform a pendulum motion, and the sludge M is discharged from the end surface opening 6 b of the air diffusion pipe 6 while scraping off the sludge in the air diffusion pipe 6. . This operation may be a cleaning method using pressure water.

本発明の散気装置は、例えば浄水、排水および廃水処理施設などの水処理施設で利用できる。   The air diffuser of the present invention can be used in water treatment facilities such as water purification, drainage and wastewater treatment facilities.

実施例１に係る散気装置を含む膜ろ過装置を示す斜視図である。1 is a perspective view showing a membrane filtration device including an air diffuser according to Example 1. FIG. 実施例１に係る散気管の底面図である。It is a bottom view of the air diffusing tube according to the first embodiment. 図２のＡ−Ａ’断面図である。It is A-A 'sectional drawing of FIG. 実施例１に係る散気管内での原水飛沫の動きを示す断面図である。It is sectional drawing which shows a motion of the raw | natural water splash in the diffuser tube which concerns on Example 1. FIG. 散気穴からの空気散気速度に対する、散気穴から散気管内への浸水量を示すグラフである。It is a graph which shows the amount of water infiltrated into the diffuser pipe from the diffuser hole with respect to the air diffused velocity from the diffuser hole. 実施例１に係る散気管の清掃状態を示す断面図である。It is sectional drawing which shows the cleaning state of the diffuser tube which concerns on Example 1. FIG. 従来の散気管内での原水飛沫の動きを示す断面図である。It is sectional drawing which shows the motion of the raw | natural water splash in the conventional diffuser.

符号の説明Explanation of symbols

１ 膜ろ過装置
２ 浸漬膜
３ 集水管
４ ろ過水管
５ ポンプ
６ 散気管
７ 屈曲管
８ 送気管
９ ｙ字管
５０ ブロワ
Ｄ ろ過水
Ｍ 汚泥
Ｓ 原水 DESCRIPTION OF SYMBOLS 1 Membrane filtration apparatus 2 Immersion membrane 3 Water collecting pipe 4 Filtration water pipe 5 Pump 6 Aeration pipe 7 Bending pipe 8 Air supply pipe 9 Y-shaped pipe 50 Blower D Filtration water M Sludge S Raw water

Claims (5)

原水（Ｓ）をろ過するろ過エレメント（２）と、原水（Ｓ）中に気泡を放出するため散気管（６）と、前記散気管（６）の散気穴（６ａ）から散気する空気を供給する空気供給手段（５０）とを備えた散気装置において、前記散気管（６）の断面中心線（Ｘ０）を通る鉛直面と前記散気管（６）の交差線（Ｘ１）に対して前記散気穴（６ａ）を千鳥に配置したことを特徴とする散気装置。 Filter element (2) for filtering raw water (S), diffuser pipe (6) for releasing bubbles in raw water (S), and air diffused from diffuser hole (6a) of said diffuser pipe (6) In the air diffuser comprising an air supply means (50) for supplying air, with respect to a vertical plane passing through the cross-sectional center line (X0) of the air diffuser pipe (6) and an intersection line (X1) of the air diffuser pipe (6) The air diffusing hole (6a) is arranged in a staggered manner. 原水（Ｓ）をろ過するろ過エレメント（２）と、原水（Ｓ）中に気泡を放出するため散気管（６）と、前記散気管（６）の散気穴（６ａ）から散気する空気を供給する空気供給手段（５０）とを備えた散気装置において、前記散気管（６）の断面中心線（Ｘ０）と直交し且つ前記散気穴（６ａ）を通る平面上で前記断面中心線（Ｘ０）から下ろした鉛直線（Ｙ）と前記断面中心線（Ｘ０）と前記散気穴（６ａ）を結ぶ直線（Ｌ）とが成す角度θが１０度から４０度の角度範囲内にあることを特徴とする散気装置。 Filter element (2) for filtering raw water (S), diffuser pipe (6) for releasing bubbles in raw water (S), and air diffused from diffuser hole (6a) of said diffuser pipe (6) An air supply means (50) for supplying air, wherein the cross-sectional center on a plane orthogonal to the cross-sectional center line (X0) of the air diffusing pipe (6) and passing through the air diffusing hole (6a) The angle θ formed by the vertical line (Y) drawn from the line (X0), the cross-sectional center line (X0), and the straight line (L) connecting the diffuser holes (6a) is within an angle range of 10 degrees to 40 degrees. A diffuser characterized by being. 請求項１または請求項２に記載の散気装置において、前記散気穴（６ａ）からの空気散気速度を大気圧力換算で１穴当たり１７．５［ｍ／sec］以上、２５［ｍ／sec］以下とすることを特徴とする散気装置。 The air diffuser according to claim 1 or 2, wherein an air diffused velocity from the air diffuser hole (6a) is 17.5 [m / sec] or more per hole and 25 [m / sec. sec] A diffuser characterized by: 請求項１から請求項３のいずれかに記載の散気装置において、前記散気管（６）への空気供給側と反対側の前記散気管（６）の端部を下方に曲げ且つ端面を開口（６ｂ）にしたことを特徴とする散気装置。 The air diffuser according to any one of claims 1 to 3, wherein an end of the air diffuser pipe (6) opposite to an air supply side to the air diffuser pipe (6) is bent downward and an end face is opened. An air diffuser characterized in that it is (6b). 請求項４に記載の散気装置において、設置間隔および設置本数を変更可能に複数の前記散気管（６）を設置したことを特徴とする散気装置。 The air diffusing device according to claim 4, wherein a plurality of the air diffusing pipes (6) are installed so that an installation interval and the number of installation can be changed.
JP2008280633A 2008-10-31 2008-10-31 Air diffuser Pending JP2010104932A (en)

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