JP2003251346A - Water treatment device by membrane filtration and operation method therefor - Google Patents
Water treatment device by membrane filtration and operation method thereforInfo
- Publication number
- JP2003251346A JP2003251346A JP2002060433A JP2002060433A JP2003251346A JP 2003251346 A JP2003251346 A JP 2003251346A JP 2002060433 A JP2002060433 A JP 2002060433A JP 2002060433 A JP2002060433 A JP 2002060433A JP 2003251346 A JP2003251346 A JP 2003251346A
- Authority
- JP
- Japan
- Prior art keywords
- membrane
- tank
- treated water
- water
- filtration
- 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.)
- Pending
Links
Landscapes
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、膜ろ過による水処
理装置に係り、特に、上水及び下水等の水処理全般に使
用される、ろ過膜が浸漬された膜浸漬槽から処理水を処
理水槽に移送するための水処理装置とその運転方法に関
する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water treatment apparatus by membrane filtration, and more particularly, it treats treated water from a membrane dipping tank in which a filtration membrane is immersed, which is used for general water treatment such as clean water and sewage. The present invention relates to a water treatment device for transferring to a water tank and an operating method thereof.
【０００２】[0002]
【従来の技術】従来、図４に記載のように、ろ過膜を用
いる水処理装置においては、ろ過膜３が浸漬された膜浸
漬槽１から膜ろ過された処理水を処理水槽２に移送する
のは、必要流量に見合った吸引ポンプ１０を適宜稼動さ
せて行っていた。また、処理水量が増えてろ過膜３を複
数設置する場合は、図５に示すように、その分ポンプ１
０の台数を増やすか、ポンプの容量を増やすことで対応
していた。このように、ポンプを用いて処理水を移送す
る方式では、膜ろ過処理を継続している間は、連続的に
ポンプを稼動する必要があり、処理水量が多くなるに従
ってその動力費は増大し、エネルギー的にも経済的にも
問題があった。2. Description of the Related Art Conventionally, as shown in FIG. 4, in a water treatment apparatus using a filtration membrane, the membrane-filtered treated water is transferred from a membrane immersion tank 1 in which a filtration membrane 3 is immersed to a treated water tank 2. This was done by appropriately operating the suction pump 10 corresponding to the required flow rate. When the amount of treated water is increased and a plurality of filtration membranes 3 are installed, as shown in FIG.
This was dealt with by increasing the number of 0s or increasing the pump capacity. As described above, in the method of transferring the treated water using the pump, the pump needs to be continuously operated while the membrane filtration treatment is continued, and the power cost thereof increases as the treated water amount increases. , There were problems in terms of energy and economy.
【０００３】[0003]
【発明が解決しようとする課題】本発明は、上記従来技
術の問題点を改良し、運転当初のみ動力を用いればよ
く、運転継続中は無動力で処理水が得られる省エネルギ
ーな膜ろ過による水処理装置とその運転方法を提供する
ことを課題とする。DISCLOSURE OF THE INVENTION The present invention has improved the above-mentioned problems of the prior art, and it suffices to use power only at the beginning of operation and to obtain treated water with no energy during continuous operation. An object is to provide a processing device and a method for operating the processing device.
【０００４】[0004]
【課題を解決するための手段】上記課題を解決するため
に、本発明では、内部にろ過膜が浸漬された膜浸漬槽
と、膜ろ過された処理水を貯留する処理水槽と、該膜浸
漬槽内のろ過膜と該処理水槽とを接続する移送配管とを
有する膜ろ過による水処理装置において、前記移送配管
が膜浸漬槽の水面より下に開口部を有して処理水槽に接
続されると共に、該移送配管に配管内を減圧にする減圧
装置を接続し、サイフォンにより膜ろ過水を処理水槽に
移送することとしたものである。前記水処理装置におい
て、減圧装置は、真空ポンプ又は真空タンクを用いるこ
とができ、前記移送配管には、複数のろ過膜を接続する
ことができる。また、本発明では、前記膜ろ過による水
処理装置の運転方法において、膜ろ過された処理水を処
理水槽に移送する当初は、移送配管内を減圧装置を作動
させて減圧にし、ろ過膜から処理水槽にサイフォンを形
成し、サイフォン形成後は該減圧装置を停止することと
したものである。In order to solve the above problems, in the present invention, a membrane dipping tank in which a filtration membrane is immersed, a treated water tank for storing the membrane-filtered treated water, and the membrane dipping In a water treatment device by membrane filtration having a filtration membrane in the tank and a transfer pipe connecting the treated water tank, the transfer pipe is connected to the treated water tank with an opening below the water surface of the membrane immersion tank. At the same time, a pressure reducing device for reducing the pressure inside the pipe is connected to the transfer pipe, and the membrane filtered water is transferred to the treated water tank by a siphon. In the water treatment device, a vacuum pump or a vacuum tank can be used as the decompression device, and a plurality of filtration membranes can be connected to the transfer pipe. Further, in the present invention, in the method for operating a water treatment apparatus by membrane filtration, at the beginning of transferring the membrane-filtered treated water to the treated water tank, the decompressor is operated in the transfer pipe to reduce the pressure, and the treated membrane is treated. A siphon is formed in the water tank, and the decompression device is stopped after the siphon is formed.
【０００５】[0005]
【発明の実施の形態】次に、本発明を図面を用いて詳細
に説明する。図１は、本発明の水処理装置の基本構成図
である。図１において、１は膜浸漬槽、２は処理水槽で
あり、膜浸漬槽１内にはろ過膜３が設置され、該ろ過膜
３からの膜ろ過水は、移送配管６により、処理水槽２に
移送されている。移送配管６の処理水槽２側の開口部９
は、膜浸漬槽１の水面８より下に配備され、該水面８と
開口部９の高低差が大きい程、処理水槽の流速が大きく
なる。また、移送配管６には、真空ポンプ４に接続する
配管７が分岐されており、ろ過膜３から処理水を処理水
槽２に移送する運転開始時は、真空ポンプ４を稼動させ
て、移送配管内に処理水を満たし、移送配管６内が処理
水槽で満たされサイフォンが形成されると、真空ポンプ
を停止し、サイフォン作用による自然の水位差で、ろ過
膜３から処理水槽２へ処理水が移送される。DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described in detail with reference to the drawings. FIG. 1 is a basic configuration diagram of a water treatment device of the present invention. In FIG. 1, 1 is a membrane immersion tank, 2 is a treated water tank, a filtration membrane 3 is installed in the membrane immersion tank 1, and the membrane filtered water from the filtration membrane 3 is transferred through a transfer pipe 6 to the treated water tank 2 Have been transferred to. Opening 9 on the treated water tank 2 side of the transfer pipe 6
Is disposed below the water surface 8 of the membrane immersion tank 1, and the greater the height difference between the water surface 8 and the opening 9, the higher the flow velocity of the treated water tank. Further, a pipe 7 connected to the vacuum pump 4 is branched to the transfer pipe 6, and when the operation of transferring the treated water from the filtration membrane 3 to the treated water tank 2 is started, the vacuum pump 4 is operated to move the transfer pipe. When the inside of the transfer pipe 6 is filled with the treated water and the siphon is formed by forming the siphon, the vacuum pump is stopped and the treated water is transferred from the filtration membrane 3 to the treated water tank 2 due to the natural water level difference due to the siphon action. Be transferred.
【０００６】図２は、本発明の水処理装置の別の構成図
を示し、（ａ）は全体構成図、（ｂ）は真空タンクを用
いた部分構成図であり、図２（ａ）では、ろ過膜３が浸
漬された膜浸漬槽１が３台併列に設置されており、移送
配管の開口部９は処理水槽２内の水面下に設けられ、真
空ポンプ４の稼動時はバルブＶ１、Ｖ２を開とし、移送
配管６内に水を満たして行う。このように、膜浸漬槽１
が３台併列に設置されていても、図２（ａ）のように真
空ポンプ４は１台でよい。また、真空ポンプ４の接続配
管は、移送配管６の膜浸漬槽１の水面８より下に接続す
るのがよい。図２（ｂ）は、真空ポンプ４に真空タンク
５を設置した例であり、膜浸漬槽を増加した場合は、真
空タンクの容量を増やすだけで容易に容量アップするこ
とができる。また、真空タンク５内の水は、ろ過膜の逆
洗用の水としても使用することができる。FIG. 2 shows another configuration diagram of the water treatment apparatus of the present invention, (a) is an overall configuration diagram, (b) is a partial configuration diagram using a vacuum tank, and FIG. , Three membrane immersion tanks 1 in which the filtration membrane 3 is immersed are installed in parallel, the opening 9 of the transfer pipe is provided below the water surface in the treated water tank 2, and the valve V1 is operated when the vacuum pump 4 is in operation. V2 is opened and the transfer pipe 6 is filled with water. Thus, the membrane immersion tank 1
2 is installed in parallel, only one vacuum pump 4 is required as shown in FIG. Further, the connection pipe of the vacuum pump 4 is preferably connected below the water surface 8 of the membrane immersion tank 1 of the transfer pipe 6. FIG. 2B shows an example in which the vacuum tank 5 is installed in the vacuum pump 4. When the number of membrane dipping tanks is increased, the capacity can be easily increased only by increasing the capacity of the vacuum tank. The water in the vacuum tank 5 can also be used as water for backwashing the filtration membrane.
【０００７】図３は、本発明の水処理装置の真空タンク
を用いた場合の真空タンク部分のフロー構成図である。
図３において、運転開始時は、バルブＶ２とＶ３を開と
して、真空ポンプ４を稼動し、真空タンク５を減圧にす
ると、接続配管７から処理水が流入して真空タンク内の
水位が徐々に上昇しＨに達し、移送配管６内は処理水で
満たされる。この時点でバルブＶ３を閉として真空ポン
プを停止すると、処理水はサイフォン作用により移送配
管６内を水位差により処理水槽２に移送される。長時間
運転していくと、真空タンク５内に徐々に空気が入り、
真空タンク５内の水位が低下してくるので、その水位が
Ｍに達したときに、真空ポンプ４を稼動してバルブＶ３
を開として真空タンク５を減圧していく。減圧するに従
って、接続配管７から水が流入し、水位がＨに達した時
点でバルブＶ３を閉として真空ポンプを停止する。この
ような操作により、真空タンク５の真空を維持すること
ができる。バルブＶ４は、この操作中常に閉とする。FIG. 3 is a flow diagram of the vacuum tank portion when the vacuum tank of the water treatment apparatus of the present invention is used.
In FIG. 3, when the operation is started, the valves V2 and V3 are opened, the vacuum pump 4 is operated, and the vacuum tank 5 is depressurized, so that the treated water flows from the connection pipe 7 and the water level in the vacuum tank gradually increases. The temperature rises and reaches H, and the inside of the transfer pipe 6 is filled with the treated water. At this point, when the valve V3 is closed and the vacuum pump is stopped, the treated water is transferred to the treated water tank 2 due to the water level difference in the transfer pipe 6 due to the siphon action. When operating for a long time, air gradually enters the vacuum tank 5,
Since the water level in the vacuum tank 5 decreases, when the water level reaches M, the vacuum pump 4 is operated to operate the valve V3.
Is opened and the vacuum tank 5 is depressurized. As the pressure is reduced, water flows in from the connecting pipe 7, and when the water level reaches H, the valve V3 is closed and the vacuum pump is stopped. With such an operation, the vacuum of the vacuum tank 5 can be maintained. The valve V4 is always closed during this operation.
【０００８】[0008]
【発明の効果】本発明によれば、運転開始時のみに減圧
装置を稼動し、通常運転時はサイフォン作用により水位
差のみで運転できるので、運転に要する動力費が不要で
あり、また複数のろ過膜に対しても一台の減圧装置で運
転可能であり、設備的にも簡略化できる。According to the present invention, since the decompression device is operated only at the start of operation and can be operated only by the water level difference due to the siphon action during the normal operation, the power cost required for the operation is not required and a plurality of The filter membrane can also be operated with a single decompression device, and the facility can be simplified.
【図１】本発明の水処理装置の基本構成図。FIG. 1 is a basic configuration diagram of a water treatment device of the present invention.
【図２】本発明の水処理装置の別の構成図で、（ａ）は
全体構成図、（ｂ）は真空タンクを用いた部分構成図。FIG. 2 is another configuration diagram of the water treatment device of the present invention, (a) is an overall configuration diagram, and (b) is a partial configuration diagram using a vacuum tank.
【図３】真空タンク部分のフロー構成図。FIG. 3 is a flow configuration diagram of a vacuum tank portion.
【図４】従来の水処理装置の基本構成図。FIG. 4 is a basic configuration diagram of a conventional water treatment device.
【図５】従来の水処理装置の概略構成図。FIG. 5 is a schematic configuration diagram of a conventional water treatment device.
１：膜浸漬槽、２：処理水槽、３：ろ過膜、４：真空ポ
ンプ、５：真空タンク、６：移送配管、７：減圧装置と
の接続配管、８：水面、９：開口部、Ｖ１〜Ｖ４：バル
ブ1: Membrane dipping tank, 2: Treated water tank, 3: Filtration membrane, 4: Vacuum pump, 5: Vacuum tank, 6: Transfer pipe, 7: Connection pipe with decompression device, 8: Water surface, 9: Opening part, V1 ~ V4: Valve
───────────────────────────────────────────────────── フロントページの続き (72)発明者 松本 直秀 東京都大田区羽田旭町11番１号 株式会社 荏原製作所内 Ｆターム(参考） 4D006 GA06 GA07 HA93 JA53Z JA55Z KA12 KA13 KA81 KC03 KC13 KE21Q KE22Q KE23Q KE24Q PA01 PB02 PB08 ─────────────────────────────────────────────────── ─── Continued front page (72) Inventor Naohide Matsumoto 11-1 Haneda Asahi-cho, Ota-ku, Tokyo Co., Ltd. Inside the EBARA CORPORATION F-term (reference) 4D006 GA06 GA07 HA93 JA53Z JA55Z KA12 KA13 KA81 KC03 KC13 KE21Q KE22Q KE23Q KE24Q PA01 PB02 PB08
Claims (4)
膜ろ過された処理水を貯留する処理水槽と、該膜浸漬槽
内のろ過膜と該処理水槽とを接続する移送配管とを有す
る膜ろ過による水処理装置において、前記移送配管が、
膜浸漬槽の水面より下に開口部を有して処理水槽に接続
されると共に、該移送配管に配管内を減圧にする減圧装
置を接続し、サイフォンにより膜ろ過水を処理水槽に移
送することを特徴とする膜ろ過による水処理装置。1. A membrane immersion tank having a filtration membrane immersed therein,
In a water treatment device by membrane filtration having a treated water tank for storing the membrane-filtered treated water, and a transfer pipe connecting the filtration membrane in the membrane immersion tank and the treated water tank, the transfer pipe is
The membrane immersion tank has an opening below the water surface and is connected to the treated water tank, and a decompression device for decompressing the inside of the pipe is connected to the transfer pipe, and the membrane filtered water is transferred to the treated water tank by a siphon. A water treatment device using membrane filtration.
ンクであることを特徴とする請求項１記載の膜ろ過によ
る水処理装置。2. The water treatment device by membrane filtration according to claim 1, wherein the decompression device is a vacuum pump or a vacuum tank.
することを特徴とする請求項１又は２記載の膜ろ過によ
る水処理装置。3. The water treatment apparatus by membrane filtration according to claim 1, wherein a plurality of filtration membranes are connected to the transfer pipe.
水処理装置の運転方法において、膜ろ過された処理水を
処理水槽に移送する当初は、移送配管内を減圧装置を作
動させて減圧にし、ろ過膜から処理水槽にサイフォンを
形成し、サイフォン形成後は該減圧装置を停止すること
を特徴とする膜ろ過による水処理装置の運転方法。4. The method for operating a water treatment apparatus by membrane filtration according to claim 1, 2 or 3, wherein at the beginning of transferring the membrane-filtered treated water to the treated water tank, a decompression device is operated in the transfer pipe. A method for operating a water treatment device by membrane filtration, which comprises decompressing, forming a siphon from a filtration membrane in a treated water tank, and stopping the decompression device after forming the siphon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002060433A JP2003251346A (en) | 2002-03-06 | 2002-03-06 | Water treatment device by membrane filtration and operation method therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002060433A JP2003251346A (en) | 2002-03-06 | 2002-03-06 | Water treatment device by membrane filtration and operation method therefor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2003251346A true JP2003251346A (en) | 2003-09-09 |
Family
ID=28669794
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2002060433A Pending JP2003251346A (en) | 2002-03-06 | 2002-03-06 | Water treatment device by membrane filtration and operation method therefor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2003251346A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102004057383A1 (en) * | 2004-11-26 | 2006-06-08 | Ulrich Weise | Wastewater microfilter comprises carrier with main sewer, diaphragms held at the carrier, pure water connection and overfall basin floating in the wastewater basin |
| CN105268321A (en) * | 2015-10-16 | 2016-01-27 | 王凤蕊 | Negative-pressure triggered ultrafiltration device capable of normal flow filtration |
| JP2019166424A (en) * | 2018-03-22 | 2019-10-03 | 株式会社クボタ | Wastewater treatment device and wastewater treatment method |
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| JPH10118684A (en) * | 1996-10-17 | 1998-05-12 | Tokyu Constr Co Ltd | Immersion type membrane separation and activated sludge apparatus |
| JPH10128373A (en) * | 1996-10-28 | 1998-05-19 | Hitoshi Daidou | Biological treatment method |
| JPH1199321A (en) * | 1997-09-26 | 1999-04-13 | Mitsubishi Rayon Co Ltd | Hollow fiber membrane filter device |
| JPH11207332A (en) * | 1998-01-28 | 1999-08-03 | Maezawa Ind Inc | Immersion type membrane filtering device of siphon suction system |
-
2002
- 2002-03-06 JP JP2002060433A patent/JP2003251346A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10118684A (en) * | 1996-10-17 | 1998-05-12 | Tokyu Constr Co Ltd | Immersion type membrane separation and activated sludge apparatus |
| JPH10128373A (en) * | 1996-10-28 | 1998-05-19 | Hitoshi Daidou | Biological treatment method |
| JPH1199321A (en) * | 1997-09-26 | 1999-04-13 | Mitsubishi Rayon Co Ltd | Hollow fiber membrane filter device |
| JPH11207332A (en) * | 1998-01-28 | 1999-08-03 | Maezawa Ind Inc | Immersion type membrane filtering device of siphon suction system |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102004057383A1 (en) * | 2004-11-26 | 2006-06-08 | Ulrich Weise | Wastewater microfilter comprises carrier with main sewer, diaphragms held at the carrier, pure water connection and overfall basin floating in the wastewater basin |
| CN105268321A (en) * | 2015-10-16 | 2016-01-27 | 王凤蕊 | Negative-pressure triggered ultrafiltration device capable of normal flow filtration |
| JP2019166424A (en) * | 2018-03-22 | 2019-10-03 | 株式会社クボタ | Wastewater treatment device and wastewater treatment method |
| JP7073154B2 (en) | 2018-03-22 | 2022-05-23 | 株式会社クボタ | Wastewater treatment equipment and wastewater treatment method |
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