JPH057889A - Aerating and agitating device - Google Patents
Aerating and agitating deviceInfo
- Publication number
- JPH057889A JPH057889A JP18515691A JP18515691A JPH057889A JP H057889 A JPH057889 A JP H057889A JP 18515691 A JP18515691 A JP 18515691A JP 18515691 A JP18515691 A JP 18515691A JP H057889 A JPH057889 A JP H057889A
- Authority
- JP
- Japan
- Prior art keywords
- hollow shaft
- shaft
- motor
- screw
- hollow
- 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
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Landscapes
- Aeration Devices For Treatment Of Activated Polluted Sludge (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は好気・嫌気の供用開始時
における低負荷運転及び汚水中の窒素の除去を効果的に
行う汚水処理における曝気撹拌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 an aeration and agitation device for sewage treatment which effectively performs low load operation at the start of aerobic / anaerobic operation and removal of nitrogen in sewage.
【0002】[0002]
【従来の技術】汚水中の有機物質を除去する処理方法と
して汚水を撹拌し、かつ曝気作用にて好気性にて処理す
る方法がある。しかし、従来の通気量制御可能なスクリ
ュー型曝気機は好気運転、すなわち汚水中に空気を供給
して汚水中の有機物質を分解して処理する好気運転時に
は問題がないが、嫌気運転時に通気を停止すると中空軸
内の負圧で、中空軸内に汚水を吸い上げ、汚水による中
空軸内を閉鎖するため、回転するモータ中空軸と固定側
部品との間にオイルシール等でシールし、さらに微小孔
を設け、この微小孔より微少空気を流して対処してい
る。また図3に示すように接続フランジ7A内に微小孔
を設け、モータケーシング12Aの内周にシール4Aを
設ける。2. Description of the Related Art As a treatment method for removing organic substances in wastewater, there is a method of agitating wastewater and aerobically treating it by aeration. However, the conventional screw-type aerator with a controllable air flow rate does not have a problem during aerobic operation, that is, during aerobic operation in which air is supplied to the wastewater to decompose and treat organic substances in the wastewater. When ventilation is stopped, the negative pressure inside the hollow shaft sucks up dirty water into the hollow shaft and closes the hollow shaft due to dirty water.Therefore, an oil seal or the like is used to seal between the rotating motor hollow shaft and the fixed side parts. Further, a minute hole is provided, and a small amount of air is made to flow from this minute hole to cope with the problem. Further, as shown in FIG. 3, minute holes are provided in the connection flange 7A, and a seal 4A is provided on the inner circumference of the motor casing 12A.
【0003】[0003]
【発明が解決しようとする課題】このようにモータ中空
軸と固定側部材との間にオイルシールをする場合、中空
軸の負圧で、シールの面圧が高くなり、シール及びこれ
に接触する部品の摩耗が激しく、頻繁に交換補修する必
要がある。またラビリンスを用いる場合には軸の芯振れ
でラビリンスの隙間に制限があり、加工精度、調整が非
常にシビアであった。When an oil seal is provided between the hollow shaft of the motor and the stationary member, the negative pressure of the hollow shaft increases the surface pressure of the seal and causes the seal and the contact thereof. Parts are heavily worn and need frequent replacement and repair. Further, when a labyrinth is used, the clearance of the labyrinth is limited due to the runout of the shaft, and the machining accuracy and adjustment are very severe.
【0004】本発明はZ形シールを採用することで圧力
差によりこれが変形して微小隙間が生じる特性を利用
し、摩耗が少なく、組立が容易で、中空軸への付着物を
防止し、交換・補修の不要なノーメンテナンスの曝気撹
拌運転を長期間にわたって行うことを目的とする。The present invention utilizes the characteristics of the Z-shaped seal that is deformed due to the pressure difference and produces a minute gap, which is less worn, is easy to assemble, prevents deposits on the hollow shaft, and is replaced. -The purpose is to perform a maintenance-free aeration stirring operation that does not require repair for a long period of time.
【0005】[0005]
【課題を解決するための手段】本発明は上記目的を達成
するためになしたもので、中空状のモータ軸に、スクリ
ューを下端に設けた中空軸を直結すると共に、このモー
タ軸の反負荷側に通気量を調整するための制御弁と、中
空軸端にZ形シールを設けたことを要旨とする。SUMMARY OF THE INVENTION The present invention has been made to achieve the above object. A hollow motor shaft is directly connected to a hollow shaft having a screw at its lower end, and the motor shaft has an anti-load. The gist is that a control valve for adjusting the ventilation amount is provided on the side and a Z-shaped seal is provided at the end of the hollow shaft.
【0006】[0006]
【作用】モータ1により中空軸2を介して軸先端のスク
リュー3を回転させると汚水は撹拌されると共にこの汚
水中のスクリューの推進力により生じる負圧で、中空軸
に直結されているモータの中空軸の反出力軸側より空気
を吸引し、中空軸内を経て水中に送り出す。この時、吸
気側に設けた制御弁5を開閉操作することで、その空気
量を調整する。そして制御弁5を完全に閉鎖しても、ケ
ーシングの内周にZ形シール4を設けているので、この
Z形シールの左右の圧力差により生じる隙間を通して微
少空気が吸入され、中空軸内に常に空気が充満され、汚
水の中空軸内への侵入が阻止され、中空軸内に汚泥等が
付着堆積することがなく、好気運転に切替時でも円滑に
駆動できる。なお、微小空気の量に応じ、Z形シール
は、数量と方向の組合せが可能である。When the motor 1 rotates the screw 3 at the tip of the shaft through the hollow shaft 2, the waste water is agitated and the negative pressure generated by the propulsive force of the screw in the waste water causes a negative pressure of the motor directly connected to the hollow shaft. Air is sucked from the side opposite to the output shaft side of the hollow shaft and sent out into the water through the hollow shaft. At this time, the air amount is adjusted by opening / closing the control valve 5 provided on the intake side. Even if the control valve 5 is completely closed, since the Z-shaped seal 4 is provided on the inner circumference of the casing, a small amount of air is sucked through the gap created by the pressure difference between the Z-shaped seal and the hollow shaft. It is always filled with air, the invasion of dirty water into the hollow shaft is prevented, and sludge and the like does not adhere and accumulate in the hollow shaft, so that smooth driving can be performed even when switching to aerobic operation. The Z-shaped seal can be combined in quantity and direction depending on the amount of micro air.
【0007】[0007]
【実施例】以下本発明を図1、図2に示す実施例に基づ
いて説明する。下水、産業用廃水等、汚水の処理におい
て使用するスクリュー型自吸式曝気装置Aは図1に示す
ように、モータ1と、このモータ1の中空状モータ軸1
1に直結される所要長の中空軸2と、中空軸2の先端に
設けたスクリュー3と、モータ軸11の反負荷側に設け
たZ形シール4、及び通気量制御用の制御弁5より構成
される。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on the embodiments shown in FIGS. As shown in FIG. 1, a screw type self-priming aerator A used for treating sewage such as sewage and industrial wastewater has a motor 1 and a hollow motor shaft 1 of the motor 1.
1, a hollow shaft 2 of a required length directly connected to the screw shaft 1, a screw 3 provided at the tip of the hollow shaft 2, a Z-shaped seal 4 provided on the opposite side of the motor shaft 11, and a control valve 5 for controlling the air flow rate. Composed.
【0008】中空軸2は所要の長さと強度を有するもの
で、曝気装置Aを曝気槽または水路等に汚水水面に対
し、所要の侵入角度を有するように配置したとき、この
水面より所定深さに達するようにして適当にその長さを
定め、かつ先端にスクリュー3を固定する。The hollow shaft 2 has a required length and strength, and when the aeration device A is arranged in an aeration tank or a water channel so as to have a required penetration angle with respect to the sewage surface, a predetermined depth from the water surface. The length is appropriately determined so as to reach, and the screw 3 is fixed to the tip.
【0009】中空軸2の基端側には軸継手6を介してモ
ータ1のモータ軸11が連設され、モータ1の駆動にて
中空軸2を介してスクリュー3を回動させ、汚水中で、
かつスクリュー先端水域にて負圧を発生させ、この負圧
を利用して中空状のモータ軸11、中空軸2を経てスク
リュー先端水域内へ空気を微細気泡として供給するよう
になす。この場合、図示省略したが、モータ1には電気
制御回路を設けて、モータの回転数を制御することによ
りスクリューの回転数を調整し、曝気及び撹拌を調整で
きるようになすこともある。A motor shaft 11 of the motor 1 is connected to the base end side of the hollow shaft 2 via a shaft joint 6, and the screw 3 is rotated by the drive of the motor 1 via the hollow shaft 2 to remove waste water. so,
In addition, a negative pressure is generated in the water area at the tip of the screw, and this negative pressure is used to supply air as fine bubbles to the water area at the tip of the screw through the hollow motor shaft 11 and the hollow shaft 2. In this case, although not shown in the drawings, an electric control circuit may be provided in the motor 1 so that the rotation speed of the motor is controlled to adjust the rotation speed of the screw so that aeration and stirring can be adjusted.
【0010】前記モータ軸11はモータ1のケーシング
12に軸受13,13を介して回動自在に支持されると
共に、このケーシング12に接続フランジ7を接続する
と共に、このケーシング12の内周にZ形シール4を設
ける。さらに接続フランジ7には制御弁5を設け、この
制御弁5を電動開閉式として開閉操作し、通気量を調整
するものである。この制御弁5は前回で設定された好気
運転時の通気量となるようにし、負荷に応じて調整可能
とし、嫌気運転時には全閉、もしくは全閉に近い状態と
する。The motor shaft 11 is rotatably supported by a casing 12 of the motor 1 via bearings 13 and 13, a connecting flange 7 is connected to the casing 12, and the inner periphery of the casing 12 is Z-shaped. A shape seal 4 is provided. Further, a control valve 5 is provided on the connection flange 7, and the control valve 5 is electrically operated to open and close to adjust the ventilation amount. The control valve 5 is set to have the ventilation amount set during the aerobic operation set at the previous time and can be adjusted according to the load, and is fully closed or close to the fully closed state during the anaerobic operation.
【0011】従って上述のごとく構成された装置におい
て、モータ1により駆動され、回転する中空軸2の先端
のスクリュー3を水没させるとスクリューの推進力によ
り生じる負圧で、中空軸に直結されているモータの中空
軸の反出力軸側より空気を吸引し、水中に送り出すもの
で、吸気側に設けた電動ボール弁等の制御弁5を開閉操
作することで、その空気量を調整する。このとき、使用
するバルブは手動・電動及び型式は問わず、電磁弁等中
間開閉調整困難なバルブでは開時間と閉時間のタイムス
ケジュールを調整することで、曝気量を調整できる。な
お、バルブ全閉時にはZ形シール4が左右の圧力差によ
り変形し、その際に生じる隙間を通して微少空気量が水
中に供給される。この時、Z形シールの向き、数量は要
求される空気量により調整している。一方、従来は図3
のように接続フランジ7Aに微小孔を設け、モータケー
シング12Aの内周にシール4Aを設け、バルブ全開時
には微小孔を通して微少空気量を水中に供給して対応し
ていた。Therefore, in the apparatus constructed as described above, when the screw 3 at the tip of the rotating hollow shaft 2 driven by the motor 1 is submerged in water, it is directly connected to the hollow shaft by the negative pressure generated by the propelling force of the screw. Air is sucked in from the side opposite to the output shaft side of the hollow shaft of the motor and sent out into the water. The amount of air is adjusted by opening / closing the control valve 5 such as an electric ball valve provided on the intake side. At this time, the valve to be used may be manual, electric, or any model, and the aeration amount can be adjusted by adjusting the time schedule of the opening time and the closing time for a valve such as a solenoid valve whose intermediate opening and closing adjustment is difficult. When the valve is fully closed, the Z-shaped seal 4 is deformed by the pressure difference between the left and right, and a minute amount of air is supplied into the water through the gap generated at that time. At this time, the direction and quantity of the Z-shaped seal are adjusted according to the required air volume. On the other hand, conventionally, FIG.
As described above, the connection flange 7A is provided with a minute hole, the motor casing 12A is provided with the seal 4A on the inner circumference, and when the valve is fully opened, a minute amount of air is supplied into the water through the minute hole.
【0012】[0012]
【発明の効果】制御弁を嫌気運転時、全閉しても中空軸
内にはZ形シールの変形による隙間より吸気されるの
で、中空軸には空気で満たされて汚水が中空軸内に侵入
することないので、中空軸内に汚泥等が付着堆積するこ
とがなく、好気運転に切替時でも円滑に駆動でき、更に
従来の微小孔とシールの組み合わせに対し、摩耗部がな
く、メンテナンスが非常に楽になる。When the control valve is fully closed during anaerobic operation, the hollow shaft is sucked through the gap due to the deformation of the Z-shaped seal, so that the hollow shaft is filled with air and sewage enters the hollow shaft. Since it does not invade, sludge etc. does not adhere and deposit inside the hollow shaft, it can be driven smoothly even when switching to aerobic operation, and there is no wear part compared to the conventional combination of micro holes and seals, and maintenance Will be much easier.
【図1】本発明曝気撹拌装置の一部破断した正面図であ
る。FIG. 1 is a partially cutaway front view of an aeration and agitation device of the present invention.
【図2】要部の拡大断面図である。FIG. 2 is an enlarged cross-sectional view of a main part.
【図3】発明者等が従来考えて来た要部構造の説明図で
ある。FIG. 3 is an explanatory diagram of a main part structure conventionally considered by the inventors.
1 モータ 11 モータ軸 2 中空軸 3 スクリュー 4 Z形シール 5 制御弁 4A シール 4B ラビリンス 1 Motor 11 Motor Shaft 2 Hollow Shaft 3 Screw 4 Z Type Seal 5 Control Valve 4A Seal 4B Labyrinth
Claims (1)
に設けた中空軸を直結すると共に、このモータ軸の反負
荷側に通気量を調整するための制御弁と、モータ軸端に
Z形シールを設けたことを特徴とする曝気撹拌装置。Claim: What is claimed is: 1. A hollow motor shaft is directly connected to a hollow shaft having a screw at a lower end thereof, and a control valve for adjusting a ventilation amount is provided on an anti-load side of the motor shaft. An aeration agitator characterized in that a Z-shaped seal is provided at the motor shaft end.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18515691A JPH057889A (en) | 1991-06-28 | 1991-06-28 | Aerating and agitating device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18515691A JPH057889A (en) | 1991-06-28 | 1991-06-28 | Aerating and agitating device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH057889A true JPH057889A (en) | 1993-01-19 |
Family
ID=16165824
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP18515691A Pending JPH057889A (en) | 1991-06-28 | 1991-06-28 | Aerating and agitating device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH057889A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU2676356C2 (en) * | 2014-03-31 | 2018-12-28 | Секисуй Кемикал Ко., Лтд. | Intermediate film for laminated glass and laminated glass |
-
1991
- 1991-06-28 JP JP18515691A patent/JPH057889A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU2676356C2 (en) * | 2014-03-31 | 2018-12-28 | Секисуй Кемикал Ко., Лтд. | Intermediate film for laminated glass and laminated glass |
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