JP6509970B2 - Vertical axis aeration stirring device for biological water treatment and method of replacing aeration stirring device - Google Patents
Vertical axis aeration stirring device for biological water treatment and method of replacing aeration stirring device Download PDFInfo
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- JP6509970B2 JP6509970B2 JP2017153047A JP2017153047A JP6509970B2 JP 6509970 B2 JP6509970 B2 JP 6509970B2 JP 2017153047 A JP2017153047 A JP 2017153047A JP 2017153047 A JP2017153047 A JP 2017153047A JP 6509970 B2 JP6509970 B2 JP 6509970B2
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- 238000005273 aeration Methods 0.000 title claims description 100
- 238000003756 stirring Methods 0.000 title claims description 82
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims description 24
- 238000000034 method Methods 0.000 title description 29
- 238000013019 agitation Methods 0.000 claims description 11
- 230000003647 oxidation Effects 0.000 description 35
- 238000007254 oxidation reaction Methods 0.000 description 35
- 238000005276 aerator Methods 0.000 description 3
- 230000004323 axial length Effects 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 2
- 244000005700 microbiome Species 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 241000195493 Cryptophyta Species 0.000 description 1
- 239000002551 biofuel Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 239000010801 sewage sludge Substances 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
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- 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
Description
本発明は、生物学的水処理用の縦軸型曝気撹拌装置及び曝気撹拌装置の交換方法に関するものである。 The present invention relates to a vertical aeration agitator for biological water treatment and a method of replacing the aeration agitator.
下水や汚水等の被処理水を生物処理する方法として、無終端状の循環水路が形成されたオキシデーションディッチ槽を使用する方法が知られている。このオキシデーションディッチ槽における曝気撹拌装置としては、縦軸型、横軸型及び斜軸型の３種類が知られている。 As a method of biological treatment of treated water such as sewage and sewage, a method using an oxidation ditch tank in which a non-continuous circulating water channel is formed is known. As the aeration and stirring device in this oxidation ditch tank, three types of vertical axis type, horizontal axis type and oblique axis type are known.
例えば、特許文献１には、縦軸型の曝気撹拌装置を備えたオキシデーションディッチ槽が記載されている。これについて図４を用いて説明すると、オキシデーションディッチ槽１は、周囲壁２、区画壁３により直線水路Ａ及び循環水路Ｂが形成され、直線水路Ａの区画壁３に隣接して縦軸型曝気撹拌装置４及びバッフル板５が設けられている。 For example, Patent Document 1 describes an oxidation ditch tank equipped with an aeration and stirring device of the vertical axis type. This will be described with reference to FIG. 4. In the oxidation ditch tank 1, a straight water channel A and a circulating water channel B are formed by the surrounding wall 2 and the dividing wall 3, and the vertical ditch is adjacent to the dividing wall 3 of the straight water channel A. An aeration stirrer 4 and a baffle plate 5 are provided.
縦軸型曝気撹拌装置４は、オキシデーションディッチ槽１の上部からシャフトが垂下するように固定され、当該シャフトの下端にはインペラが形成されている。当該インペラは、オキシデーションディッチ槽１内に張られた被処理水の水面上から一部が出た状態で固定され、この状態でインペラを回転させることにより、被処理水の表面曝気を行うと共に、撹拌流を形成して、微生物の生育環境を整えている。 The vertical axis type aeration and stirring apparatus 4 is fixed so that the shaft hangs down from the upper portion of the oxidation ditch tank 1, and an impeller is formed at the lower end of the shaft. The impeller is fixed in a state where a part of the impeller comes out of the water surface of the treatment water stretched in the oxidation ditch tank 1, and by rotating the impeller in this state, surface aeration of the treatment water is performed. Stirring flow is formed to prepare the growth environment of microorganisms.
一方、横軸型の曝気撹拌装置を備えたオキシデーションディッチ槽について図５を用いて説明すると、特許文献１に記載された縦軸型曝気撹拌装置４と同様に、オキシデーションディッチ槽１の直線水路Ａに横軸型曝気撹拌装置８が設けられている。 また、オキシデーションディッチ槽１は通常屋外に設置されているため、雪の多い地域等では天井部６が設けられている。そして、天井部６には横軸型曝気撹拌装置８を取り付けるための取り付け口７が形成されている。さらに、天井部６には、メンテナンス等のために使用する大きな開口部９が形成されている。 On the other hand, an oxidation ditch tank equipped with a horizontal axis type aeration stirring device will be described with reference to FIG. 5. Similar to the vertical axis aeration stirring device 4 described in Patent Document 1, the straight line of the oxidation ditch tank 1 In the water channel A, a horizontal axis aeration stirring device 8 is provided. Moreover, since the oxidation ditch tank 1 is usually installed outdoors, the ceiling part 6 is provided in the area etc. with much snow. And in the ceiling part 6, the attachment port 7 for attaching the horizontal-axis type aeration stirring apparatus 8 is formed. Furthermore, the ceiling 6 is formed with a large opening 9 used for maintenance and the like.
ここで、縦軸型曝気装置は横軸型・斜軸型曝気装置と比較して、一般的に曝気性能や維持管理性に優れているため、横軸型・斜軸型曝気撹拌装置を縦軸型曝気撹拌装置に取り換えたいというニーズがある。そして、既設の横軸型曝気撹拌装置から縦軸型曝気撹拌装置への取り換えを行うにあたり、既設部分の変更は最小限に抑えたいという課題がある。 Here, since the vertical axis aerator is generally superior in aeration performance and maintainability to management as compared with the horizontal axis / diagonal axis aerator, the horizontal axis / diagonal axis aerator is vertically arranged. There is a need to replace the axial aeration and agitation device. And when replacing from the existing horizontal axis type aeration stirring apparatus to a vertical axis | shaft type aeration stirring apparatus, there exists a subject that the change of the existing part wants to be minimized.
本発明者は、横軸型曝気撹拌装置８の取り付け口７から縦軸型曝気撹拌装置４を取り付ける際に、取り付け口７の大きさよりインペラの直径の方が大きいため、インペラがオキシデーションディッチ槽１の内部に導入できないという新たな課題を発見した。
上記課題について鋭意検討した結果、縦軸型曝気撹拌装置のシャフトを分割することにより、横軸型曝気撹拌装置８の取り付け口７をそのまま利用して縦軸型曝気撹拌装置４に交換できることを見出して本発明を完成させた。
具体的には、本発明は、以下の縦軸型曝気撹拌装置及び曝気撹拌装置の交換方法を提供するものである。
Since the diameter of the impeller is larger than the size of the attachment port 7 when attaching the vertical axis aeration agitation device 4 from the attachment port 7 of the horizontal axis aeration agitation device 8, the present inventor makes the impeller an oxidation ditch tank. We discovered a new issue that we could not introduce it inside 1.
As a result of earnestly examining the above problems, it has been found that by dividing the shaft of the vertical axis aeration stirring device, the mounting port 7 of the horizontal axis aeration stirring device 8 can be replaced with the vertical axis aeration stirring device 4 as it is. The present invention has been completed.
Specifically, the present invention provides the following vertical axis aeration stirring apparatus and a method of replacing the aeration stirring apparatus.
（本願第１発明）
上記課題を解決するための本願第１発明は、インペラ及びシャフトを有した生物学的水処理に用いられる縦軸型曝気撹拌装置において、前記シャフトはインペラが付いた第一シャフトと、前記第一シャフトに連結される第二シャフトに分割されることを特徴とする縦軸型曝気撹拌装置である。
（本願第２発明）
上記課題を解決するための本願第２発明は、前記第一シャフトの長さは、前記インペラの直径よりも小さいことを特徴とする本願第１発明に記載の縦軸型曝気撹拌装置である。
（本願第３発明）
上記課題を解決するための本願第３発明は、本願第１または第２発明に記載の縦軸型曝気撹拌装置と、前記曝気撹拌装置を取り付けるための矩形の取り付け口と、を備え、前記第一シャフトの長さは、前記矩形の取り付け口の短辺の長さより小さいことを特徴とする生物学的水処理装置である。
（本願第４発明）
上記課題を解決するための本願第４発明は、非縦軸型曝気撹拌装置の取り付け口を通して非縦軸型曝気撹拌装置を縦軸型曝気撹拌装置に交換することを特徴とする曝気撹拌装置の交換方法である。
(This Invention First Invention)
In a first aspect of the present invention for solving the above-mentioned problems, there is provided a vertical aeration stirring device for use in biological water treatment having an impeller and a shaft, wherein the shaft is a first shaft with an impeller, and It is divided into the 2nd shaft connected with a shaft, and it is a vertical axis type aeration stirring device characterized by the above-mentioned.
(This Invention Second Invention)
A second invention of the present invention for solving the above-mentioned problems is the vertical axis aeration stirring device according to the first invention of the present invention, characterized in that the length of the first shaft is smaller than the diameter of the impeller.
(This Invention Third Invention)
A third invention of the present application for solving the above-mentioned problems comprises the vertical axis aeration stirring device according to the first or second invention of the present application, and a rectangular attachment port for attaching the aeration stirring device. The biological water treatment apparatus is characterized in that the length of one shaft is smaller than the length of the short side of the rectangular attachment port.
(The fourth invention of the present application)
According to a fourth aspect of the present invention for solving the above-mentioned problems, in the aeration stirring apparatus, the non-vertical axis aeration stirring apparatus is replaced with the vertical axis aeration stirring apparatus through the attachment port of the non-vertical axis aeration stirring apparatus It is an exchange method.
本願第１発明の縦軸型曝気撹拌装置によれば、インペラが付いた第一シャフトを架台から分離して、横軸型曝気撹拌装置用の取り付け口とは別の大きな開口部からオキシデーションディッチ槽内に導入した後、前記取り付け口の内側から架台に取り付けることができる。そのため、横軸型曝気撹拌装置用の取り付け口をインペラが通過できるような大きさに加工することなく、縦軸型曝気撹拌装置をオキシデーションディッチ槽に取り付けることができる。 According to the vertical axis aeration stirring device of the first aspect of the present invention, the first shaft with the impeller is separated from the frame, and the oxidation ditch is separated from the large opening separate from the mounting port for the horizontal axis aeration stirring device. After being introduced into the tank, it can be attached to the mount from the inside of the attachment port. Therefore, the vertical axis type aeration and agitation device can be attached to the oxidation ditch tank without processing the attachment port for the horizontal axis type aeration and agitation device to such a size that the impeller can pass.
本願第２、第３発明の縦軸型曝気撹拌装置によれば、第一シャフトの軸方向の長さがインペラの直径より小さいため、インペラを垂直方向に立てて導入することで、インペラが付いた第一シャフトを横軸型曝気撹拌装置用の取り付け口から直接導入することができる。そのため、インペラが付いた第一シャフトをオキシデーションディッチ槽内で移動させる必要がなく、取り付ける作業が簡易なものとなる。
また、インペラが付いた第一シャフトをオキシデーションディッチ槽内で移動させる必要がないため、オキシデーションディッチ槽から被処理水を抜くことなく、縦軸型曝気撹拌装置を取り付けることも可能である。
According to the vertical aeration stirring device of the second and third inventions of the present application, since the axial length of the first shaft is smaller than the diameter of the impeller, the impeller is attached by standing and introducing the impeller vertically. The first shaft can be introduced directly from the mounting port for the transverse aeration stirrer. Therefore, there is no need to move the first shaft with the impeller in the oxidation ditch tank, and the mounting operation is simplified.
Further, since it is not necessary to move the first shaft with the impeller in the oxidation ditch tank, it is possible to attach a vertical axis aeration and stirring device without removing the water to be treated from the oxidation ditch tank.
本願第４発明の曝気撹拌装置の交換方法によれば、非縦軸型曝気撹拌装置用の取り付け口を通して、非縦軸型曝気撹拌装置を縦軸型曝気撹拌装置に交換することができるため、オキシデーションディッチ槽内の被処理水を抜く工程を省略することができる。 According to the replacement method of the aeration stirring device of the fourth aspect of the present invention, the non-vertical axis aeration stirring device can be replaced with the vertical axis aeration stirring device through the attachment port for the non-vertical axis aeration stirring device. The step of removing the water to be treated in the oxidation ditch tank can be omitted.
以下の実施例では、本発明の縦軸型曝気撹拌装置及びその取付方法、並びに、横軸型曝気撹拌装置を縦軸型曝気撹拌装置に交換する方法について説明する。 In the following embodiments, the vertical axis aeration and stirring apparatus and the mounting method thereof according to the present invention, and the method for replacing the horizontal axis aeration and stirring apparatus with the vertical axis aeration and stirring apparatus will be described.
図１は、本発明の第１の実施例の縦軸型曝気撹拌装置４の構成を示す概略説明図である。第１の実施例の縦軸型曝気撹拌装置４は、インペラ４３が付いた第一シャフト４１と、この第一シャフト４１と連結され、架台１０に取り付けられた第二シャフト４２を備えている。なお、本発明において、インペラ４３と第一シャフトは一体的に固定されているため、単に「第一シャフト４１」と表記した場合でも、断りがない限りインペラ４３を有するものを表している。 FIG. 1 is a schematic explanatory view showing the configuration of a vertical axis aeration and agitation apparatus 4 according to a first embodiment of the present invention. The vertical axis type aeration and stirring apparatus 4 of the first embodiment includes a first shaft 41 with an impeller 43 and a second shaft 42 connected to the first shaft 41 and attached to the frame 10. In the present invention, since the impeller 43 and the first shaft are integrally fixed, even when the “first shaft 41” is simply described, the one having the impeller 43 is shown unless otherwise noted.
この縦軸型曝気撹拌装置４は、架台１０を介してオキシデーションディッチ槽１の天井部６に取り付けられる。天井部６の取り付け口７は、横軸型曝気撹拌装置８が取り付けられていたものであり、インペラ４３の直径より小さい開口である。 The vertical axis type aeration and stirring apparatus 4 is attached to the ceiling 6 of the oxidation ditch tank 1 via the gantry 10. The attachment port 7 of the ceiling portion 6 is the one to which the horizontal axis aeration stirring device 8 is attached, and is an opening smaller than the diameter of the impeller 43.
インペラ４３、第一シャフト４１及び第二シャフト４２の材質は、特に限定されないが、強度及び比重の観点からステンレススチール等の金属材料が好ましい。さらに、腐食性の観点からステンレススチールであることがより好ましい。 The material of the impeller 43, the first shaft 41 and the second shaft 42 is not particularly limited, but a metal material such as stainless steel is preferable from the viewpoint of strength and specific gravity. Furthermore, stainless steel is more preferable from the viewpoint of corrosiveness.
第一シャフト４１と第二シャフト４２の連結は、フランジ等の連結部を介してボルト、へルール等の固定部材で固定することができる。回転方向の応力に強く、簡便に取り付けることが可能であることから、ボルトが好ましい。 The connection between the first shaft 41 and the second shaft 42 can be fixed by a fixing member such as a bolt or a stem through a connecting portion such as a flange. Bolts are preferred because they are resistant to rotational stresses and can be easily installed.
次に、本発明の縦軸型曝気撹拌装置４を取り付ける方法を説明する。図２は、本発明の第１の実施例の縦軸型曝気撹拌装置を取り付ける方法を示す概略説明図である。
オキシデーションディッチ槽１の天井部６には、横軸型曝気撹拌装置８の取り付けのための取り付け口７の他に、メンテナンス等のために開放可能な開口部９を有している。開口部９は、インペラ４３の直径よりも大きいものである。
Next, the method of attaching the vertical axis | shaft type aeration stirring apparatus 4 of this invention is demonstrated. FIG. 2 is a schematic explanatory view showing a method of attaching the vertical axis type aeration and stirring apparatus of the first embodiment of the present invention.
The ceiling 6 of the oxidation ditch tank 1 has an opening 9 which can be opened for maintenance or the like, in addition to a mounting port 7 for mounting the horizontal axis aeration stirring device 8. The opening 9 is larger than the diameter of the impeller 43.
本発明の縦軸型曝気撹拌装置４を取り付ける方法は、インペラ４３が付いた第一シャフト４１と架台１０に固定された第二シャフト４２を分離する工程、第二シャフト４２が固定された架台１０を取り付け口７に設置する工程、インペラ４３が付いた第一シャフト４１をインペラ４３の直径より大きい開口部９よりオキシデーションディッチ槽１内に導入する工程、インペラ４３が付いた第一シャフト４１をオキシデーションディッチ槽１の内部を通して取り付け口７の下方に移送する工程、第二シャフト４２の連結部とインペラ４３が付いた第一シャフト４１の連結部を固定具で固定する工程を具備する。 The method of attaching the vertical axis type aeration and stirring apparatus 4 of the present invention comprises the steps of separating the first shaft 41 with the impeller 43 and the second shaft 42 fixed to the gantry 10, the gantry 10 to which the second shaft 42 is fixed. Installing the first shaft 41 with the impeller 43 into the oxidation ditch tank 1 from the opening 9 larger than the diameter of the impeller 43, installing the first shaft 41 with the impeller 43 The step of transferring through the inside of the oxidation ditch tank 1 below the attachment port 7 and the step of fixing the connecting portion of the second shaft 42 and the connecting portion of the first shaft 41 with the impeller 43 with a fixture.
「第二シャフト４２が固定された架台１０を取り付け口７に設置する工程」では、第二シャフト４２が固定された架台１０が、横軸型曝気撹拌装置用の取り付け口７を架橋するように設置される。このとき、第二シャフト４２のフランジは、オキシデーションディッチ槽１の内部方向に向けられている。 In the "step of installing the gantry 10 to which the second shaft 42 is fixed to the mounting opening 7", the gantry 10 to which the second shaft 42 is fixed bridges the mounting opening 7 for the horizontal axis aeration stirring device. Will be installed. At this time, the flange of the second shaft 42 is directed in the inward direction of the oxidation ditch tank 1.
本発明の縦軸型曝気撹拌装置４及びその取り付け方法を用いることにより、横軸型曝気撹拌装置用の取り付け口７を縦軸型曝気撹拌装置用に大きくするための工事が不要となり、横軸型曝気撹拌装置用の取り付け口７に縦軸型曝気撹拌装置４を簡便に取り付けることができる。 By using the vertical axis aeration and stirring apparatus 4 of the present invention and the method for attaching the same, the work for enlarging the mounting port 7 for the horizontal axis aeration and stirring apparatus for the vertical axis aeration and stirring apparatus becomes unnecessary. The vertical axis type aeration and agitation device 4 can be easily attached to the attachment port 7 for the type aeration and agitation device.
また、横軸型曝気撹拌装置８と縦軸型曝気撹拌装置４を交換する方法では、オキシデーションディッチ槽１の被処理水を抜く工程、横軸型曝気撹拌装置８を取り付け口７より取り外す工程を経て、上記縦軸型曝気撹拌装置４を取り付ける方法を適用する。 Further, in the method of exchanging the horizontal axis type aeration stirring device 8 and the vertical axis type aeration stirring device 4, the step of removing the water to be treated in the oxidation ditch tank 1, and the step of removing the horizontal axis type aeration stirring device 8 from the attachment port 7 The method of attaching the said vertical axis | shaft type aeration stirring apparatus 4 is applied.
図３は、本発明の第２の実施例の縦軸型曝気撹拌装置の構成を示す概略説明図である。第２の実施例の縦軸型曝気撹拌装置は、第一シャフト４１の軸方向の長さが、インぺラ４３の直径よりも小さく設計されたものである。さらに好ましくは、第一シャフト４１の軸方向の長さが、矩形の取り付け口７の短辺の長さより小さく設計されたものである。 FIG. 3 is a schematic explanatory view showing the configuration of a vertical axis type aeration and stirring apparatus according to a second embodiment of the present invention. The vertical axis type aeration and stirring apparatus of the second embodiment is designed such that the axial length of the first shaft 41 is smaller than the diameter of the impeller 43. More preferably, the axial length of the first shaft 41 is designed to be smaller than the length of the short side of the rectangular attachment port 7.
このように設計することにより、第一シャフト４１を横軸型曝気撹拌装置用の取り付け口７を通してオキシデーションディッチ槽１の内部に導入することができる。なお、第一シャフト４１の軸方向の長さが、矩形の取り付け口７の短辺の長さ以上の場合には、取り付け口７付近で第一シャフト４１を回転させながら導入することにより（破線矢印）、取り付け口７を介して第一シャフト４１を導入することができる。 By designing in this manner, the first shaft 41 can be introduced into the interior of the oxidation ditch tank 1 through the attachment port 7 for the horizontal axis aeration and agitation apparatus. In addition, when the length in the axial direction of the first shaft 41 is equal to or more than the length of the short side of the rectangular attachment port 7, the first shaft 41 is introduced while rotating around the attachment port 7 (broken line Arrows), the first shaft 41 can be introduced via the mounting port 7.
第２の実施例における縦軸型曝気撹拌装置を取り付ける方法では、第一シャフト４１を取り付け口７より導入する点で、第１の実施例と相違する。すなわち、第２の実施例の縦軸型曝気撹拌装置を取り付ける方法は、インペラ４３が付いた第一シャフト４１と架台１０に固定された第二シャフト４２を分離する工程、インペラ４３が付いた第一シャフト４１を横軸型曝気撹拌装置用の取り付け口７を通してオキシデーションディッチ槽１内に導入する工程、第二シャフト４２の連結部とインペラ４３が付いた第一シャフト４１の連結部を固定具で固定する工程、架台１０を取り付け口７に設置する工程を具備するものであ
る。
The method of attaching the vertical axis type aeration and stirring apparatus in the second embodiment is different from the first embodiment in that the first shaft 41 is introduced from the attachment port 7. That is, the method of attaching the vertical axis type aeration and stirring apparatus of the second embodiment includes the steps of separating the first shaft 41 with the impeller 43 and the second shaft 42 fixed to the gantry 10; A step of introducing one shaft 41 into the oxidation ditch tank 1 through the attachment port 7 for the horizontal axis aeration stirring device, fixing the connection portion of the second shaft 42 and the connection portion of the first shaft 41 with the impeller 43 Fixing step, and a step of installing the gantry 10 in the mounting port 7.
第２の実施例では、第一シャフト４１が横軸型曝気撹拌装置用の取り付け口７を通してオキシデーションディッチ槽１の内部に導入できるため、取り付け方法が簡易なものとなる。
また、横軸型曝気撹拌装置８と縦軸型曝気撹拌装置４を交換する方法では、オキシデーションディッチ槽１の被処理水を抜く工程が省略できるため、より簡略された交換方法を提供することができる。
In the second embodiment, since the first shaft 41 can be introduced into the inside of the oxidation ditch tank 1 through the attachment port 7 for the horizontal axis aeration and agitation apparatus, the attachment method becomes simple.
Further, in the method of exchanging the horizontal axis type aeration and stirring apparatus 8 and the vertical axis type aeration and stirring apparatus 4, a process of removing the water to be treated in the oxidation ditch tank 1 can be omitted. Can.
本発明の縦軸型曝気撹拌装置は、実施例のオキシデーションディッチ槽のような生物学的水処理装置に利用される。生物学的水処理装置とは、下水汚泥等のような有機性汚泥や、食品工場や医薬品工場等から発生する有機性排水を好気性微生物の働きにより浄化するための装置である。そのほか、栄養分やバイオ燃料を産生する藻類等の大型培養施設にも応用することができる。
その形式としては、円筒タンク型の曝気槽や、複数の槽が連結して一連の生物学的水処理を行う生物学的水処理システム等が挙げられる。オキシデーションディッチ槽のような大型の生物学的水処理装置では、インペラも大きくなり、交換作業の困難性が高く、また、被処理水を抜く作業にも多大な時間を必要とするため、本発明の効果が顕著なものとなり好ましい。
The vertical axis type aeration and stirring apparatus of the present invention is used in a biological water treatment apparatus such as the oxidation ditch tank of the embodiment. The biological water treatment apparatus is an apparatus for purifying organic sludge such as sewage sludge or the like, organic wastewater generated from a food factory, a pharmaceutical factory or the like by the action of an aerobic microorganism. Besides, it can be applied to large culture facilities such as algae which produce nutrients and biofuels.
Examples of such a system include a cylindrical tank-type aeration tank, and a biological water treatment system in which a plurality of tanks are connected to perform a series of biological water treatment. In a large biological water treatment system such as an oxidation ditch tank, the impeller also becomes large, making it difficult to replace it, and requiring a great deal of time to remove the water to be treated. The effects of the invention are remarkable, which is preferable.
また、本発明の曝気撹拌装置の交換方法は、非縦軸型曝気撹拌装置が設置されている生物学的水処理装置であればどのような装置でも適用することができる。実施例の横軸型曝気撹拌装置が設置されていた生物学的水処理装置のほか、斜軸型曝気撹拌装置が設置されている生物学的水処理装置において、斜軸型曝気撹拌装置を縦軸型曝気撹拌装置に交換する方法にも適用することができる。
なお、本発明の縦軸型曝気撹拌装置、その取付方法、非縦軸型曝気撹拌装置から縦軸型曝気撹拌装置への交換方法は、必ずしもインペラより小さい取り付け口に適用するにとどまらず、インペラより大きな取り付け口に適用してもよいことはいうまでもない。
Further, the method of replacing aeration stirring devices of the present invention can be applied to any biological water treatment device in which a non-vertical axis aeration stirring device is installed. In addition to the biological water treatment apparatus in which the horizontal axis aeration stirring apparatus of the embodiment was installed, in the biological water treatment apparatus in which the oblique axis aeration stirring apparatus is installed, the oblique axis aeration stirring apparatus is vertically arranged. The present invention can also be applied to a method of replacing with an axial aeration and stirring apparatus.
In addition, the vertical axis type aeration stirring apparatus of the present invention, the mounting method thereof, and the method of replacing the non-vertical axis type aeration stirring apparatus with the vertical axis type aeration stirring apparatus are not necessarily applied to the mounting port smaller than the impeller. It goes without saying that the invention may be applied to larger attachment ports.
さらに、本発明の縦軸型曝気撹拌装置は、縦軸型曝気撹拌装置のインペラの形状を交換する方法にも適用することができる。インペラの形状を交換する方法は、縦軸型曝気撹拌装置が固定された架台をオキシデーションディッチ槽の天井部から取り外す工程、前記架台を吊り上げる工程、インペラが付いた第一シャフトを第二シャフトから取り外す工程、異なる形状のインペラが付いた第一シャフトを第二シャフトに連結する工程、異なる形状のインペラが付いた第一シャフトを有する縦軸型曝気撹拌装置をオキシデーションディッチ槽の天井部に設置する工程を具備する。
ここで、「インペラが付いた第一シャフトを第二シャフトから取り外す工程」は、オキシデーションディッチ槽の内部又は外部のいずれで行ってもよい。この工程は、インペラより取り付け口が大きい場合は、安全性の観点からオキシデーションディッチ槽の外部で行うことが好ましい。
Furthermore, the vertical axis type aeration and stirring apparatus of the present invention can also be applied to a method of changing the shape of the impeller of the vertical axis type aeration and stirring apparatus. The method of changing the shape of the impeller includes the steps of removing the frame to which the vertical axis aeration and stirring apparatus is fixed from the ceiling of the oxidation ditch tank, lifting the frame, and moving the first shaft with the impeller from the second shaft Removal step, connecting a first shaft with different shaped impellers to a second shaft, installing a vertical aeration stirrer with a first shaft with different shaped impellers on the ceiling of the oxidation ditch tank And a step of
Here, the "step of removing the first shaft with the impeller from the second shaft" may be performed either inside or outside the oxidation ditch tank. It is preferable to carry out this process outside the oxidation ditch tank from the viewpoint of safety when the attachment port is larger than the impeller.
また、第一シャフトの長さがインペラの直径より小さい構成では、第一シャフトの重量を小さくできるため、交換用の第一シャフトを安価に作製することができる。 Further, in the configuration in which the length of the first shaft is smaller than the diameter of the impeller, the weight of the first shaft can be reduced, so that the replacement first shaft can be manufactured inexpensively.
このほか、本発明の縦軸型曝気撹拌装置は、第一シャフトと第二シャフトの間に、シャフトの長さを調節するための第三シャフトを設けることにより、オキシデーションディッチ槽内のインペラの深さを調節する方法に適用することもできる。 In addition, the vertical axis type aeration and stirring apparatus according to the present invention is characterized in that the third shaft for adjusting the length of the shaft is provided between the first shaft and the second shaft. It can be applied to the method of adjusting the depth.
１ オキシデーションディッチ槽、２ 周囲壁、３ 区画壁、４ 縦軸型曝気撹拌装置、４１ 第一シャフト、４２ 第二シャフト、４３ インペラ、５ バッフル板、６ 天井部、７ 取り付け口、８ 横軸型曝気撹拌装置、９ 開口部、１０ 架台、Ａ 直線水路、Ｂ 循環水路
DESCRIPTION OF SYMBOLS 1 oxidation ditch tank, 2 surrounding wall, 3 division wall, 4 vertical axis aeration stirring apparatus, 41 1st shaft, 42 2nd shaft, 43 impeller, 5 baffle plate, 6 ceiling part, 7 mounting port, 8 horizontal axis Type aeration stirring device, 9 openings, 10 pedestals, A straight water channel, B circulation water channel
Claims (1)
前記曝気撹拌装置を取り付けるための矩形の取り付け口と、を備え、
前記シャフトはインペラが付いた第一シャフトと、前記第一シャフトに連結される第二シャフトに分割され、
前記生物学的水処理システムに取り付ける前の第一シャフトの長さは、前記インペラの直径よりも小さく、
前記第一シャフトの長さは、前記矩形の取り付け口の短辺の長さより小さく、
前記インペラの直径は、生物学的水処理システムの曝気撹拌装置を取り付けるための矩形の取り付け口の短辺の長さより大きいことを特徴とする生物学的水処理システム。 A longitudinal aeration and stirring device having an impeller and a shaft;
And a rectangular attachment port for attaching the aeration stirring device;
The shaft is divided into a first shaft with an impeller and a second shaft connected to the first shaft,
The length of the first shaft prior to attachment to the biological water treatment system is smaller than the diameter of the impeller,
The length of the first shaft is smaller than the length of the short side of the rectangular attachment port,
A biological water treatment system characterized in that the diameter of the impeller is larger than the length of the short side of a rectangular attachment port for attaching the aeration and agitation device of the biological water treatment system.
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| AU510239B2 (en) * | 1976-06-18 | 1980-06-19 | General Signal Corporation | Liquid aeration impeller |
| JPH1110188A (en) * | 1997-06-24 | 1999-01-19 | Hitachi Kiden Kogyo Ltd | Screw type aerator |
| JP3621026B2 (en) * | 2000-07-07 | 2005-02-16 | 住友重機械工業株式会社 | Sewage treatment apparatus and treatment method |
| JP3775974B2 (en) * | 2000-07-10 | 2006-05-17 | 日立機電工業株式会社 | Aerator |
| JP5591751B2 (en) * | 2011-03-31 | 2014-09-17 | 住友重機械エンバイロメント株式会社 | Oxidation ditch and method of repairing oxidation ditch |
| JP2012210602A (en) * | 2011-03-31 | 2012-11-01 | Sumitomo Heavy Industries Environment Co Ltd | Method for repairing oxidation ditch |
| JP2013049045A (en) * | 2011-08-03 | 2013-03-14 | Sumitomo Heavy Industries Environment Co Ltd | Longitudinal axis type aerator |
| CN102910729A (en) * | 2011-08-03 | 2013-02-06 | 住友重机械环境工程株式会社 | Longitudinal axis-type aeration device |
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