JP2011200776A - Sand filter apparatus - Google Patents

Sand filter apparatus Download PDF

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JP2011200776A
JP2011200776A JP2010069220A JP2010069220A JP2011200776A JP 2011200776 A JP2011200776 A JP 2011200776A JP 2010069220 A JP2010069220 A JP 2010069220A JP 2010069220 A JP2010069220 A JP 2010069220A JP 2011200776 A JP2011200776 A JP 2011200776A
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sand
raw water
filtration
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water dispersion
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JP5350301B2 (en
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Daisuke Ayukawa
大祐 鮎川
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Takuma Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To improve the quantity of water to be treated per filter bed and to achieve reduction of a manufacturing cost and shortening the time for completion.SOLUTION: A plurality of raw water dispersion pipes 7 is disposed on a parallel with the sidewall 2b of a filter bed, each of the raw water dispersion pipes 7 is connected to at least one raw water inflow pipe 5 and an air lift pipe 9 is arranged between the raw water dispersion pipes 7 which adjoins mutually.

Description

本発明は、下水の高度処理などに用いられる上向流移床式の砂ろ過装置に関するものである。   The present invention relates to an upflow moving bed type sand filtration device used for advanced treatment of sewage.

従来、下水の高度処理に用いられる砂ろ過装置としては、重力式下向流ろ過方式（固定床）、重力式上向流ろ過方式（固定床）および上向流移床式ろ過方式がある。このうち、上向流移床式ろ過方式は、ろ過操作を実施すると同時にろ材である砂を連続的に洗浄する方式であるため、ろ過池の損失水頭の上昇が少なく、連続してろ過水が得られ、かつメンテナンスが容易であるという特徴を有しており、水処理に広く用いられている。   Conventionally, sand filtration apparatuses used for advanced treatment of sewage include a gravity downflow filtration system (fixed bed), a gravity upflow filtration system (fixed bed), and an upflow moving bed filtration system. Of these, the upward flow moving bed filtration method is a method of continuously washing the sand that is the filter medium at the same time as performing the filtration operation, so there is little increase in the loss head of the filtration basin, and the filtered water is continuously discharged. It has the characteristics of being obtained and easy to maintain, and is widely used for water treatment.

次に、図５を参照しつつ、従来の上向流移床式の砂ろ過装置の概略構成および作用について説明する。
上向流移床式砂ろ過装置５０は、筒状部５１の下部が逆コーン状の底部５２とされた容器５３内にろ材の砂が充填されてろ過層（砂層）５４が形成されるよう構成されている。原水は原水流入管５５からガイドパイプ５６および原水分散装置５７を介してろ過層５４の下部に供給される。原水分散装置５７は、複数本（８本）の五角形の断面をもつパイプで下面が開放されている。こうして、原水は原水分散装置５７の下部より流出し、ろ過層５４を上部へと流れる間にろ過層５４によりろ過され、ろ過後の処理水は上部からオーバーフローされて集水トラフ５８に流れ、次のプロセスへと送られる。一方、容器５３の下部にはエアリフト管５９が挿入されており、このエアリフト管５９に空気を吹き込むことにより、内部の空気＋砂＋原水の重量と、周囲の砂＋水の重量差による循環力の発生により、汚れた砂と原水がエアリフト管５９内部を上昇する。この上昇中に、砂は空気と水とにより撹拌洗浄される。上昇した空気と砂と水は分離器６０で分離され、砂はサンドウォッシャー６１でろ過水と対向流で洗浄され、再びろ過層５４へ戻される。水は、洗浄排水となりオリフィスプレート（孔のあいた板）６２の孔を通り洗浄排水管６３に流れる。 Next, referring to FIG. 5, the schematic configuration and operation of a conventional upward flow moving bed type sand filtration apparatus will be described.
The upward flow moving bed type sand filtration apparatus 50 is configured such that a filter layer (sand layer) 54 is formed by filling the sand of the filter medium in a container 53 in which the lower part of the cylindrical part 51 is an inverted cone-shaped bottom part 52. It is configured. The raw water is supplied from the raw water inflow pipe 55 to the lower part of the filtration layer 54 through the guide pipe 56 and the raw water dispersing device 57. The raw water dispersion device 57 is a pipe having a plurality of (eight) pentagonal cross-sections, and the lower surface is opened. Thus, the raw water flows out from the lower part of the raw water dispersing device 57 and is filtered by the filtration layer 54 while flowing through the filtration layer 54 to the upper part. The treated water after the filtration overflows from the upper part and flows into the water collecting trough 58, Sent to the process. On the other hand, an air lift pipe 59 is inserted in the lower part of the container 53. By blowing air into the air lift pipe 59, the circulation force due to the weight of the internal air + sand + raw water and the weight of the surrounding sand + water is increased. As a result, the dirty sand and raw water rise inside the air lift pipe 59. During this ascent, the sand is agitated and washed with air and water. The raised air, sand and water are separated by the separator 60, and the sand is washed by the sand washer 61 in a counter flow with the filtered water and returned to the filtration layer 54 again. The water flows into the cleaning drainage pipe 63 through the holes of the orifice plate (holed plate) 62 as cleaning drainage.

図５に示されるユニットを複数個並べて構成されるものはマルチモジュール型砂ろ過装置と称される。このマルチモジュール型砂ろ過装置７０においては、図６に示されるように、各ユニット７１が平面視で円形となっていることから、各ユニット７１間に囲まれる部分と、ユニット７１とろ過池壁７２とで囲まれる部分とには鉄筋コンクリート製の支柱７３が配される（特許文献１参照）。   What is constituted by arranging a plurality of units shown in FIG. 5 is called a multi-module type sand filter. In this multi-module type sand filtration device 70, as shown in FIG. 6, each unit 71 is circular in plan view, and therefore, a portion surrounded by each unit 71, the unit 71 and the filtration pond wall 72 A column 73 made of reinforced concrete is disposed on the portion surrounded by (refer to Patent Document 1).

特開平１１−１７９１１０号公報Japanese Patent Laid-Open No. 11-179110

しかしながら、上記従来のマルチモジュール型砂ろ過装置７０においては、以下に示すような問題点がある。
（１）支柱７３が配された部分はろ過と関係のないデッドスペースとなり、このデッドスペースがろ過池の２０％以上にもなる。また、ユニット配置に合わない既設ろ過池の場合には、更にデッドスペースが増す。
（２）支柱７３は通常１ｍ角で３ｍ高さの直方体で、鉄筋コンクリート製であるため、鉄筋作成とコンクリート流し込み・乾燥のため、工期が１ケ月程度かかる（通常は、コンクリートの乾燥のため、２回打ちされる。）。その期間は、型枠や補強、足場があるため、内部のろ過器の工事ができない。
（３）内部構造はガイドパイプに原水分散装置が複数本（８本）取り付けられた構造であるため、その取り付け部分の構造が複雑となる。 However, the conventional multi-module sand filter 70 has the following problems.
(1) The portion where the column 73 is arranged becomes a dead space unrelated to filtration, and this dead space becomes 20% or more of the filtration pond. Moreover, in the case of the existing filtration pond which does not match unit arrangement, dead space increases further.
(2) The column 73 is a rectangular parallelepiped of 1 m square and 3 m high, and is made of reinforced concrete. Therefore, it takes about a month to create the reinforcing bar and cast and dry the concrete (usually, it takes 2 months to dry the concrete. It is beaten.) During that period, because of the formwork, reinforcement, and scaffolding, construction of the internal filter cannot be performed.
(3) Since the internal structure is a structure in which a plurality of (8) raw water dispersing devices are attached to the guide pipe, the structure of the attachment portion becomes complicated.

本発明は、前述のような問題点に鑑みてなされたもので、移床式の特徴である連続洗浄を維持しながら、デッドスペースをなくして、ろ過池当たりの処理水量を向上させることができ、しかも構造を簡素化して装置の製作コストの削減と工期短縮とを図ることのできる砂ろ過装置を提供することを目的とするものである。   The present invention has been made in view of the above-described problems, and can maintain the continuous washing, which is a feature of the moving bed type, while eliminating dead space and improving the amount of treated water per filtration pond. In addition, it is an object of the present invention to provide a sand filtration device that can simplify the structure and reduce the production cost of the device and shorten the construction period.

前記目的を達成するために、本発明による砂ろ過装置は、
原水流入管を介してろ過池の下部に原水が流入され、原水は砂層を上向流で通過する際にろ過されて上部からろ過水として排出され、汚れた砂はエアリフト管に導入される空気で押し上げられて分離器で砂と洗浄排水とに分離され、砂はサンドウォッシャーでろ過水と対向流で洗浄されて前記砂層に戻されるとともに、洗浄排水はオリフィスプレートを通って洗浄排水管に排水されるように構成された砂ろ過装置において、
前記ろ過池の側壁に平行に複数本の原水分散管を配設するとともに、各原水分散管を少なくとも１本の原水流入管に接続し、かつ前記エアリフト管を互いに隣接する原水分散管の間に配設することを特徴とするものである。 In order to achieve the above object, the sand filtration device according to the present invention comprises:
The raw water flows into the lower part of the filter basin through the raw water inflow pipe, and the raw water is filtered when passing upward through the sand layer and discharged as filtered water from the upper part. The dirty sand is introduced into the air lift pipe. It is pushed up by the separator and separated into sand and washing wastewater by the separator, and the sand is washed in the counterflow with the filtered water by the sand washer and returned to the sand layer, and the washing wastewater is drained to the washing drain pipe through the orifice plate. In a sand filtration device configured to be
A plurality of raw water dispersion pipes are arranged in parallel to the side wall of the filtration pond, each raw water dispersion pipe is connected to at least one raw water inflow pipe, and the air lift pipe is disposed between adjacent raw water dispersion pipes. It arrange | positions, It is characterized by the above-mentioned.

本発明によれば、複数本の原水分散管がろ過池の側壁に平行に配されるとともに、各原水分散管の間にエアリフト管が配された構成とされているので、従来のガイドパイプに複数本の原水分散装置を取り付けた構成に比べて、各ユニット間に配される支柱をなくすことができて、デッドスペースをなくすことができ、ろ過池の敷設面積の削減、ろ過池の掘削深さの低減を図って、ろ過池当たりの処理水量を向上させることができる。また、原水分散装置の取り付けのための構造が不要となるため、構造を簡素化して装置の製作コストの削減と工期短縮とを図ることができる。   According to the present invention, a plurality of raw water dispersion pipes are arranged in parallel to the side wall of the filtration pond, and an air lift pipe is arranged between the raw water dispersion pipes. Compared to the configuration with multiple raw water dispersion devices, it is possible to eliminate the struts arranged between each unit, eliminate dead space, reduce the laying area of the filtration pond, and excavation depth of the filtration pond. The amount of treated water per filtration pond can be improved by reducing the thickness. In addition, since a structure for attaching the raw water dispersing device is not required, the structure can be simplified to reduce the manufacturing cost of the device and shorten the construction period.

本発明の一実施形態に係る砂ろ過装置の断面図Sectional drawing of the sand filtration apparatus which concerns on one Embodiment of this invention. 本実施形態の砂ろ過装置の平面図Plan view of the sand filtration device of this embodiment 本実施形態の砂ろ過装置（ａ）（ｂ）を従来装置（ｃ）（ｄ）との対比で示す図（１）The figure which shows the sand filter apparatus (a) (b) of this embodiment by contrast with a conventional apparatus (c) (d) (1) 本実施形態の砂ろ過装置（ａ）を従来装置（ｂ）（ｃ）との対比で示す図（２）The figure which shows the sand filter apparatus (a) of this embodiment in contrast with a conventional apparatus (b) (c) (2) 従来の砂ろ過装置の断面図Cross section of a conventional sand filter 従来のマルチモジュール型砂ろ過装置の平面図Plan view of a conventional multi-module sand filter

次に、本発明による砂ろ過装置の具体的な実施の形態について、図面を参照しつつ説明する。   Next, specific embodiments of the sand filtration device according to the present invention will be described with reference to the drawings.

図１には、本発明の一実施形態に係る砂ろ過装置の断面図が示され、図２には、同砂ろ過装置の平面図が示されている。   FIG. 1 shows a cross-sectional view of a sand filtration device according to an embodiment of the present invention, and FIG. 2 shows a plan view of the sand filtration device.

本実施形態の砂ろ過装置１は、平面視で矩形状の側壁（ろ過池壁）２ａ，２ｂと、逆四角錐状のコーン状部を縦横に並べて組み合わせた集合体よりなる底壁３とを備えるとともに、これら側壁２ａ，２ｂおよび底壁３よりなるろ過池内にろ材の砂が充填されることにより形成されたろ過層（砂層）４を備えている。なお、以下の説明においては、便宜上、図２の横方向の側壁２を横側壁２ａと称し、縦方向の側壁２を縦側壁２ｂと称することとする。   The sand filtration device 1 according to the present embodiment includes rectangular side walls (filtration pond walls) 2a and 2b in plan view and a bottom wall 3 made of a combination of inverted quadrangular cone-like portions arranged vertically and horizontally. In addition, a filtration layer (sand layer) 4 formed by filling the filter basin composed of the side walls 2a, 2b and the bottom wall 3 with sand of a filter medium is provided. In the following description, for the sake of convenience, the lateral side wall 2 in FIG. 2 is referred to as a lateral side wall 2a, and the longitudinal side wall 2 is referred to as a longitudinal side wall 2b.

ろ過層４の上方には横側壁２ａに沿うように原水流入管５が配されている。この原水流入管５の下面には鉛直向きに配される複数本のガイドパイプ６の上端部が接続され、各ガイドパイプ６の下端部には原水分散管７の基端部が接続されている。原水分散管７は、縦側壁２ｂに平行に（原水流入管５に垂直に）配置されており、その形状は、五角形の断面をもつパイプで下面が開放された形状とされている。また、この原水分散管７の総延長長さは従来の原水分散装置５７（図５、図６参照）の総延長長さと同等とされている。こうして、原水は原水流入管５からガイドパイプ６および原水分散管７を介してろ過層４の下部に供給され、ろ過層４を上部へと流れる間にろ過される。また、ろ過後の処理水は上部からオーバーフローされて集水トラフ８に流れ、次のプロセスへと送られる。   A raw water inflow pipe 5 is disposed above the filtration layer 4 along the lateral side wall 2a. The lower end of the raw water inflow pipe 5 is connected to the upper ends of a plurality of guide pipes 6 arranged in the vertical direction, and the lower ends of the guide pipes 6 are connected to the base end of the raw water dispersion pipe 7. . The raw water dispersion pipe 7 is arranged in parallel to the vertical side wall 2b (perpendicular to the raw water inflow pipe 5), and its shape is a pipe having a pentagonal cross section with its lower surface opened. Further, the total extension length of the raw water dispersion pipe 7 is equal to the total extension length of the conventional raw water dispersion device 57 (see FIGS. 5 and 6). Thus, the raw water is supplied from the raw water inflow pipe 5 to the lower part of the filtration layer 4 via the guide pipe 6 and the raw water dispersion pipe 7, and is filtered while flowing through the filtration layer 4 to the upper part. Moreover, the treated water after filtration overflows from the upper part, flows into the water collection trough 8, and is sent to the next process.

一方、底壁３のコーン状部の頂部に対応する部分であって、互いに隣接する原水分散管７の間にはエアリフト管９が等間隔で配されており、このエアリフト管９に空気を吹き込むことにより、内部の空気＋砂＋原水の重量と、周囲の砂＋水の重量差による循環力の発生により、汚れた砂と原水がエアリフト管９内部を上昇するようになっている。この上昇中に、砂は空気と水とにより撹拌洗浄される。上昇した空気と砂と水は上方に配された分離器１０にて分離され、砂はサンドウォッシャー１１でろ過水と対向流で洗浄され、再びろ過層４へ戻される。水は、洗浄排水となりオリフィスプレート１２の孔を通り、洗浄排水トラフ１３から洗浄排水管１４に流れる。   On the other hand, air lift pipes 9 are disposed at equal intervals between the raw water dispersion pipes 7 adjacent to the top of the cone-shaped part of the bottom wall 3, and air is blown into the air lift pipes 9. Thus, dirty sand and raw water rise inside the air lift pipe 9 due to the generation of circulation force due to the weight difference between the internal air + sand + raw water and the surrounding sand + water. During this ascent, the sand is agitated and washed with air and water. The ascending air, sand and water are separated by the separator 10 disposed above, and the sand is washed by the sand washer 11 in a counterflow with filtered water and returned to the filtration layer 4 again. The water becomes cleaning wastewater, passes through holes in the orifice plate 12, and flows from the cleaning drainage trough 13 to the cleaning drainage pipe 14.

本実施形態において、ろ過層の単位面積当たりの原水分散管７の敷設長さは、０．８〜１．４ｍ／ｍ２とし、エアリフト管９の１本当たりのろ過層面積は１．５〜２．５ｍ２／本とするのが好適である。 In this embodiment, the laying length of the raw water dispersion pipe 7 per unit area of the filtration layer is 0.8 to 1.4 m / m 2, and the filtration layer area per one of the air lift pipes 9 is 1.5 to 1. It is preferable to set it to 2.5 m 2 / book.

以上のように本実施形態の砂ろ過装置１においては、複数本の原水分散管７がろ過池の縦側壁２ｂに平行に配されるとともに、各原水分散管７の間にエアリフト管９が配された構成とされているので、図６に示される従来装置における支柱７３をなくすことができて、デッドスペースをなくすことができる。したがって、ろ過池の敷設面積を削減することができる。また、底壁３のコーン状部が小分割になるため、ろ過池の掘削深さを低減することもできる。さらに、従来の原水分散装置の取り付けのための構造が不要になるため、構造の簡素化を図ることができて、装置の製作コストの削減と工期短縮とを図ることができる、という優れた効果を有する。   As described above, in the sand filtration device 1 of the present embodiment, a plurality of raw water dispersion pipes 7 are arranged in parallel to the vertical side wall 2b of the filtration pond, and an air lift pipe 9 is arranged between the raw water dispersion pipes 7. Therefore, the column 73 in the conventional apparatus shown in FIG. 6 can be eliminated, and the dead space can be eliminated. Therefore, the laying area of the filtration pond can be reduced. Moreover, since the cone-shaped part of the bottom wall 3 is subdivided, the excavation depth of the filtration pond can also be reduced. Furthermore, since the structure for attaching the conventional raw water dispersing device is not necessary, the structure can be simplified, and the excellent effect that the manufacturing cost of the device can be reduced and the construction period can be shortened. Have

図３には、本発明の砂ろ過装置（ａ）（ｂ）と従来のマルチモジュール型の砂ろ過装置（ｃ）（ｄ）とを対比させた模式図が示されている。この例は、処理量６０００ｍ３／日、ろ過速度３００ｍ／日の場合の配置を示すものである。この例の場合、必要ろ過面積は６０００／３００＝２０ｍ２となるので、従来装置（ｃ）（ｄ）の場合には１ユニット５ｍ２型が４台必要となり、ユニット設置寸法が２．５ｍ×２．５ｍであるので、５ｍ×５ｍのろ過池が必要となって、必要接地面積は２５ｍ２となる。これに対して、本発明装置（ａ）（ｂ）においては、２０ｍ２で良く、従来装置に比べて２０％のスペース低減を行うことができる。また、本発明装置では底部のコーン状部が小分割になるため、このコーン状部のコンクリート必要量が５０％低減できるとともに、ろ過池の掘削深さが０．７ｍ程度（全深さの１２％程度）浅くできるという利点がある。 FIG. 3 shows a schematic diagram in which the sand filtration devices (a) and (b) of the present invention are compared with conventional multi-module type sand filtration devices (c) and (d). This example shows the arrangement when the throughput is 6000 m 3 / day and the filtration rate is 300 m / day. In the case of this example, the required filtration area is 6000/300 = 20 m 2 , so in the case of the conventional devices (c) and (d), four 1 unit 5 m 2 types are required, and the unit installation dimension is 2.5 m × Since it is 2.5 m, a 5 m × 5 m filter basin is required, and the required ground contact area is 25 m 2 . On the other hand, in the devices (a) and (b) of the present invention, 20 m 2 is sufficient, and the space can be reduced by 20% compared to the conventional device. Further, in the apparatus of the present invention, since the bottom cone-shaped portion is divided into small parts, the required amount of concrete in the cone-shaped portion can be reduced by 50%, and the excavation depth of the filtration pond is about 0.7 m (total depth 12 There is an advantage that it can be shallow.

図４には、本発明の砂ろ過装置（ａ）を敷設した場合と、従来のマルチモジュール型の砂ろ過装置（ｂ）（ｃ）を既設水槽に入れた場合とのスペース比較が示されている。なお、従来装置の（ｂ）は３ｍ２ユニットを６台入れた場合、（ｃ）は５ｍ２ユニットを４台入れた場合の例である。（ｂ）では未利用スペースＳ１が４０％、（ｃ）では未利用スペースＳ２が３５％生じており、本発明装置において３５％以上のスペース削減が達成できることがわかる。 FIG. 4 shows a space comparison between the case where the sand filtration device (a) of the present invention is laid and the case where a conventional multi-module type sand filtration device (b) (c) is placed in an existing water tank. Yes. Incidentally, the conventional apparatus (b) If you put six of 3m 2 units, (c) shows an example in which put to four 5 m 2 unit. (B) the unused space S 1 is 40%, the (c) unused space S 2 are generated 35 percent, it can be seen that the space reduction of more than 35% in the present invention apparatus can be achieved.

このほか、本発明装置では、従来装置のような鉄筋コンクリート製の支柱７３（図５参照）が不要になるため、ろ過面積１ｍ２当たり０．８ｍ３程度のコンクリートと鉄筋が不要になる。また、構造がシンプルなため、従来の原水分散装置取り付け部に要する製作費用を削減することができる。そして、全体として、施工のための土木工事を１ケ月程度短縮することができるという優れた効果を奏するものである。 In addition, the apparatus according to the present invention does not require a reinforced concrete support column 73 (see FIG. 5) as in the conventional apparatus, so that about 0.8 m 3 of concrete and reinforcing bar per 1 m 2 of the filtration area are unnecessary. Moreover, since the structure is simple, it is possible to reduce the production cost required for the conventional raw water dispersion device mounting portion. And as a whole, there is an excellent effect that the civil engineering work for construction can be shortened by about one month.

本発明は、下水の高度処理などに用いられる上向流移床式の砂ろ過装置に適用することにより、省スペース化、製作コストの削減等に寄与する効果が大である。   When the present invention is applied to an upward flow moving bed type sand filtration device used for advanced treatment of sewage, the effect of contributing to space saving, reduction of production cost, and the like is great.

１ 砂ろ過装置
２ａ，２ｂ 側壁（ろ過池壁）
３ 底壁
４ ろ過層（砂層）
５ 原水流入管
６ ガイドパイプ
７ 原水分散管
８ 集水トラフ
９ エアリフト管
１０ 分離器
１１ サンドウォッシャー
１２ オリフィスプレート
１３ 洗浄排水トラフ
１４ 洗浄排水管 1 Sand filtration device 2a, 2b Side wall (filtration pond wall)
3 Bottom wall 4 Filtration layer (sand layer)
5 Raw water inflow pipe 6 Guide pipe 7 Raw water dispersion pipe 8 Water collection trough 9 Air lift pipe 10 Separator 11 Sand washer 12 Orifice plate 13 Washing drain trough 14 Washing drain pipe

Claims (1)

原水流入管を介してろ過池の下部に原水が流入され、原水は砂層を上向流で通過する際にろ過されて上部からろ過水として排出され、汚れた砂はエアリフト管に導入される空気で押し上げられて分離器で砂と洗浄排水とに分離され、砂はサンドウォッシャーでろ過水と対向流で洗浄されて砂層に戻されるとともに、洗浄排水はオリフィスプレートを通って洗浄排水管に排水されるように構成された砂ろ過装置において、
前記ろ過池の側壁に平行に複数本の原水分散管を配設するとともに、各原水分散管を少なくとも１本の原水流入管に接続し、かつ前記エアリフト管を互いに隣接する原水分散管の間に配設することを特徴とする砂ろ過装置。 The raw water flows into the lower part of the filtration basin through the raw water inflow pipe, and the raw water is filtered when passing upward through the sand layer and discharged as filtered water from the upper part. The dirty sand is introduced into the air lift pipe. It is pushed up by the separator and separated into sand and washing wastewater by the separator.The sand is washed in the counterflow with the filtered water by the sand washer and returned to the sand layer, and the washing wastewater is drained to the washing drain pipe through the orifice plate. In a sand filtration device configured to
A plurality of raw water dispersion pipes are arranged in parallel to the side wall of the filtration pond, each raw water dispersion pipe is connected to at least one raw water inflow pipe, and the air lift pipe is disposed between adjacent raw water dispersion pipes. A sand filtration device characterized by being arranged.
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JP2013094769A (en) * 2011-11-07 2013-05-20 Sanki Eng Co Ltd Moving bed type upflow continuous sand filtering apparatus and operation method thereof
WO2013176616A1 (en) 2012-05-23 2013-11-28 Nordic Water Products Ab Continuous sand filter plant with fluid distributors
CN113800711A (en) * 2021-09-02 2021-12-17 江苏南大华兴环保科技股份公司 Pretreatment method and system for high-concentration oily perfume wastewater
CN114477321A (en) * 2020-10-27 2022-05-13 中国石油化工股份有限公司 Device for purifying washing water of MTO device and using method

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JPS52111062A (en) * 1976-03-03 1977-09-17 Nordstjernan Rederi Ab Suspension or emulsion filtrating method and system
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013094769A (en) * 2011-11-07 2013-05-20 Sanki Eng Co Ltd Moving bed type upflow continuous sand filtering apparatus and operation method thereof
WO2013176616A1 (en) 2012-05-23 2013-11-28 Nordic Water Products Ab Continuous sand filter plant with fluid distributors
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CN114477321A (en) * 2020-10-27 2022-05-13 中国石油化工股份有限公司 Device for purifying washing water of MTO device and using method
CN114477321B (en) * 2020-10-27 2023-07-04 中国石油化工股份有限公司 Device for purifying MTO device washing water and using method thereof
CN113800711A (en) * 2021-09-02 2021-12-17 江苏南大华兴环保科技股份公司 Pretreatment method and system for high-concentration oily perfume wastewater

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