CN102548915A - 散气管 - Google Patents
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Abstract
一种散气管,能够防止在散气停止时污泥侵入管内,从而防止散气孔以及管内发生堵塞,并能够降低散气运转时的压力损耗,该散气管由管形状的弹性体构成,在倾斜面部55,切口的切断面相对于膜体52的半径方向倾斜。
Description
技术领域
本发明涉及在废水处理设施等的处理槽内进行散气的散气管(diffusertube)。
背景技术
如图8所示,现有的污泥中的散气装置是在聚氯乙烯管1上多处形成直径为数mm的散气孔2而成的,而具有在散气停止时由侵入管内的污泥堵塞散气孔2以及管内的问题。
为了防止该污泥的侵入,橡胶薄膜(membrane)式的散气装置被实用化,但是由于散气运转时的压力损耗较高,所以鼓风机的动力变高,成为使电力使用量增大的主要原因。
另外,作为散气装置,有在例如日本国特许公报特许3353225号中记载的装置。如图9所示,该装置是曝气装置,在平坦的基座3之上配置具有伸缩性的片材4,在该片材4上形成有多个切口5,经由切口5使加压气体通到液体中,由此,在液体中形成多个气泡,并且,通过使在片材4上形成的切口5的形状呈非直线状,从而能够消除片材4在切口部分裂开的缺点。
发明内容
发明要解决的问题
在上述专利文献1的结构中,在散气运转时,片材4的可动区域6鼓起而使切口5打开,从而使空气从切口5喷出。
然而,在散气运转时片材4开始鼓起的初始状态,可动区域6的切口切断面6a和主体区域7的切口切断面7a被从基座表面向基座表面的垂线方向8施力,切口切断面6a和切口切断面7a是切口5的相对的切断面。此时,若切口5的相对的切口切断面6a、7a与片材表面以及基座表面的垂线方向平行,则位于片材5的可动区域6的切口切断面6a相对于主体区域7的切口切断面7a在切断面方向上移动,切口切断面6a、7a的摩擦成为阻力,从而阻碍切口5的开放,其结果,存在压力损耗变高的问题。
本发明是为解决上述问题而提出的,其目的在于提供一种散气管,能够防止在散气停止时污泥侵入管内,从而防止散气孔以及管内发生堵塞,并且能够降低散气运转时的压力损耗。
用于解决课题的手段
为了解决上述问题,本发明提供一种散气管,其特征在于,该散气管由管形状的弹性体构成,并具有:膜体,内侧与空气供给源相连通;多个散气孔切口,贯通膜体的外表面和内表面,并为非直线状的切口,散气孔切口的至少规定部位为倾斜面部,在倾斜面部,切口的切断面相对于膜体的半径方向倾斜,并且闭区域侧的切口切断面重叠在剩余的膜体侧的切口切断面的外侧,所述闭区域由散气孔切口与连结散气孔切口两端部的线段围成,闭区域侧的切口切断面与剩余的膜体侧的切口切断面相对。
本发明的散气管,其特征在于,散气孔切口为圆弧状、V字状以及コ字状中任一种形状。
本发明的散气管,其特征在于,所述散气管具有保持体,所述保持体为对膜体的内侧面进行支撑的管状体,并形成有贯通管壁的外表面和内表面的贯通孔,所述贯通孔不与散气孔切口重叠。
发明效果
如上所述,根据本发明,在膜体的半径方向上,闭区域侧的切口切断面重叠在剩余的膜体侧的切口切断面的外侧,由此,在切口作为散气孔开口时,能够减小作用于膜体的闭区域侧和剩余的膜体侧之间的摩擦等阻力,因此在已开始向散气管送气的运转初期时,散气孔切口容易开口,从而降低散气运转时的压力损耗。
另外,在膜体的半径方向上,闭区域侧的切口切断面重叠在剩余的膜体侧的切口切断面的外侧,由此,在已停止向散气管送气的运转停止时,承受周围水压的膜体的闭区域侧利用狭的切断面密封不漏水地压接在剩余的膜体侧的切口切断面上,因此,能够防止在散气停止时污泥侵入管内,从而防止管内发生堵塞。
附图说明
图1是表示本发明的实施方式的散气管的立体图。
图2是所述实施方式的散气管的立体分解图。
图3是表示所述实施方式的散气孔的切口的示意图。
图4是图3中的A-A向视图。
图5是图3中的B-B向视图。
图6是表示所述实施方式的散气孔的切口的剖视图,(a)表示开放状态,(b)表示堵塞状态。
图7表示从所述实施方式的散气管的上方观察到的切口的图案,(a)是从中心朝向外侧的圆弧,(b)是从中心朝向外侧的山形,(c)是从中心朝向外侧的コ字,(d)是从外侧朝向中心的圆弧。
图8是表示现有的散气管的俯视图。
图9是现有的散气装置的剖视图。
具体实施方式
下面,基于附图对本发明的实施方式进行说明。在图1至图4中,散气管51的主要构件包括膜体52和保持体53,在由管形状的弹性体例如EPDM(Ethylene-Propylene-Diene Monomer:三元乙丙橡胶)、聚胺酯树脂、硅酮橡胶等构成的膜体52的内部,插入由树脂制或金属制的管状体构成的保持体53。
在膜体52的上部区域以及下部区域设置有多个散气孔切口54,散气孔切口54是贯通膜体52的外表面和内表面而形成的,为非直线状的切口,在此为圆弧状的切口,如图3所示,形成有由散气孔切口54和连结散气孔切口54的两端部的线段L围成的闭区域56。
该闭区域56借助圆弧状的散气孔切口54与膜体52断开,从而在散气运转时不追随于膜体52的膨胀而变形,而能够独自变形。
散气孔切口54的至少规定部位为倾斜面部55,在此,如图3所示那样,包含圆弧中心在内的规定范围的部位为倾斜面部55,但是倾斜面部55也可以设置于整个散气孔切口54。
如图4以及图5所示,在倾斜面部55,散气孔切口54的切断面相对于膜体52的半径方向57倾斜,闭区域56侧的切口切断面56a重叠在剩余的膜体52侧的切口切断面52a的外侧,切口切断面56a与切口切断面52a相对。
由此,闭区域56犹如盖体那样发挥作用,在散气孔切口54作为散气孔开口时,以除去覆盖在散气孔上的盖体的方式使闭区域56从剩余的膜体52侧离开,从而能够减小作用于闭区域56侧和剩余的膜体52侧之间的摩擦等阻力,因此能够降低散气运转时的压力损耗。
如图7的(a)所示,在本实施方式中,散气孔切口54为从中心侧朝向外侧的圆弧状,但如图7的(b)所示,散气孔切口54也可以为从中心侧朝向外侧的V字状,如图7的(c)所示,散气孔切口54也可以为从中心侧朝向外侧的コ字状,如图7的(d)所示,散气孔切口54也可以为从外侧朝向中心侧的圆弧状。
保持体53呈一端堵塞的有底筒体状,抵接在膜体52的内侧面来支撑膜体52,保持体53在多处形成有贯通管壁58的外表面和内表面的贯通孔59,贯通孔59设置在不与散气孔切口52重叠的位置,即设置在侧部区域。
这是因为,在贯通孔59与散气孔切口52重叠的情况下,在该散气孔切口52上局部作用有扩散气体的喷出压,散气孔切口52比其他位置有更大开口,因此来自该散气孔切口52的散气量增多,在观察散气管整体时,不能实现均匀的散气。相对于此,在贯通孔59不与散气孔切口52重叠的情况下,扩散气体的喷出压均匀作用于膜体52上,能够实现从散气管整体均匀地进行散气。
在保持体53和膜体52两端部安装的紧固件60密封不漏气地压接膜体52和保持体53,保持体53的另一端的供气口61与空气供给源的鼓风机62相连接。
下面,对上述结构的作用进行说明。图6示出散气孔切口52的作用,为了便于说明,省略保持体53而仅示出膜体52。在未从鼓风机62通过供气口61向散气管51送气的运转停止状态下,如图6的(b)所示,在倾斜面部55,在膜体52的半径方向57上,闭区域56侧的切口切断面56a重叠在剩余膜体52侧的切口切断面52a的外侧,由此,承受周围的水压的闭区域56利用切口切断面56a密封不漏水地压接在剩余的膜体52侧的切口切断面52a上,因此,能够防止在散气停止时污泥侵入管内,从而防止管内发生堵塞。
如图6的(a)所示,在散气运转时从鼓风机62通过供气口61来向散气管51送气。此时,由于在膜体52的半径方向上,闭区域56侧的切口切断面56a重叠在剩余的膜体52侧的切口切断面52a的外侧,所以能够减小作用于闭区域56侧和剩余膜体52侧之间的摩擦等阻力,因此,在已开始向散气管送气的运转初期时,散气孔切口54容易开口,从而能够降低散气运转时的压力损耗。
此外,该散气管51除了能够在废水处理设施的曝气槽中使用之外,还可以在各种产业排水处理或净水处理的曝气槽中使用,或配置在浸渍型膜分离装置的下方来用于膜面的清洗等,并不限定其适用范围。
Claims (3)
1.一种散气管,其特征在于,
该散气管由管形状的弹性体构成,并具有:
膜体,内侧与空气供给源相连通,
多个散气孔切口,是非直线状的切口,贯通膜体的外表面和内表面;
散气孔切口的至少规定部位为倾斜面部,在倾斜面部,切口的切断面相对于膜体的半径方向倾斜,并且闭区域侧的切口切断面重叠在剩余的膜体侧的切口切断面的外侧,所述闭区域由散气孔切口与连结散气孔切口的两端部的线段围成,闭区域侧的切口切断面与剩余的膜体侧的切口切断面相对。
2.如权利要求1所述的散气管,其特征在于,
散气孔切口为圆弧状、V字状以及コ字状中的任一种形状。
3.如权利要求1或2所述的散气管,其特征在于,
所述散气管具有保持体,所述保持体为对膜体的内侧面进行支撑的管状体,并形成有贯通管壁的外表面和内表面的贯通孔,所述贯通孔不与散气孔切口重叠。
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Application Number | Priority Date | Filing Date | Title |
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JP2009285824A JP5366785B2 (ja) | 2009-12-17 | 2009-12-17 | 散気管 |
JP2009-285824 | 2009-12-17 | ||
PCT/JP2010/072418 WO2011074554A1 (ja) | 2009-12-17 | 2010-12-14 | 散気管 |
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CN102548915A true CN102548915A (zh) | 2012-07-04 |
CN102548915B CN102548915B (zh) | 2014-11-05 |
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CN201080044186.0A Expired - Fee Related CN102548915B (zh) | 2009-12-17 | 2010-12-14 | 散气管 |
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US (1) | US8616534B2 (zh) |
EP (1) | EP2476653B1 (zh) |
JP (1) | JP5366785B2 (zh) |
CN (1) | CN102548915B (zh) |
WO (1) | WO2011074554A1 (zh) |
Cited By (2)
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CN104445589A (zh) * | 2014-10-28 | 2015-03-25 | 北京伊柏机电设备有限公司 | 一种气体分散器及曝气装置 |
CN109071289B (zh) * | 2016-09-09 | 2021-05-11 | 斗山能捷斯有限责任公司 | 海水曝气系统 |
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JP6067242B2 (ja) * | 2012-05-11 | 2017-01-25 | 住友重機械エンバイロメント株式会社 | 散気装置及び散気材 |
DE102012013443A1 (de) * | 2012-06-21 | 2013-12-24 | Gottfried Wilhelm Leibniz Universität Hannover | Blasenschleiererzeugungsvorrichtung |
US20140264969A1 (en) * | 2013-03-15 | 2014-09-18 | Environmental Dynamics International, Inc. | Single-layer membrane comprising polytetrafluoroethylene interspersed therein |
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Also Published As
Publication number | Publication date |
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EP2476653A4 (en) | 2012-12-05 |
US20120193818A1 (en) | 2012-08-02 |
EP2476653A1 (en) | 2012-07-18 |
JP5366785B2 (ja) | 2013-12-11 |
CN102548915B (zh) | 2014-11-05 |
WO2011074554A1 (ja) | 2011-06-23 |
JP2011125781A (ja) | 2011-06-30 |
EP2476653B1 (en) | 2014-11-12 |
US8616534B2 (en) | 2013-12-31 |
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