JP2018008269A - Vertical axis type aeration agitator for biological water treatment and exchange method of aeration agitator - Google Patents
Vertical axis type aeration agitator for biological water treatment and exchange method of aeration agitator Download PDFInfo
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- 238000005273 aeration Methods 0.000 title claims abstract description 108
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 25
- 238000011282 treatment Methods 0.000 title claims abstract description 15
- 238000000034 method Methods 0.000 title claims description 34
- 238000013019 agitation Methods 0.000 claims description 35
- 230000003647 oxidation Effects 0.000 abstract description 36
- 238000007254 oxidation reaction Methods 0.000 abstract description 36
- 238000003756 stirring Methods 0.000 description 23
- 230000004323 axial length Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 244000005700 microbiome Species 0.000 description 2
- 238000005192 partition Methods 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
- 238000005276 aerator Methods 0.000 description 1
- 239000002551 biofuel Substances 0.000 description 1
- 238000010276 construction Methods 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
- 239000010815 organic waste Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000010801 sewage sludge Substances 0.000 description 1
- 239000010802 sludge 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
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- Aeration Devices For Treatment Of Activated Polluted Sludge (AREA)
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Abstract
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 for 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 for biologically treating water to be treated such as sewage or sewage, a method using an oxidation ditch tank in which an endless circulation channel is formed is known. As the aeration and agitation apparatus in this oxidation ditch tank, three types of a vertical axis type, a horizontal axis type and an 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 Literature 1 describes an oxidation ditch tank equipped with a vertical axis type aeration stirrer. This will be described with reference to FIG. 4. In the oxidation ditch tank 1, the straight water channel A and the circulation water channel B are formed by the peripheral wall 2 and the partition wall 3, and the vertical axis type is adjacent to the partition 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 aeration and agitation device 4 is fixed so that the shaft hangs down from the upper part 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 water to be treated stretched in the oxidation ditch tank 1 comes out from the surface of the water to be treated, and by rotating the impeller in this state, the surface of the treated water is aerated A stirring flow is formed to prepare a growth environment for 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, when the oxidation ditch tank provided with the horizontal axis type aeration stirring apparatus is described with reference to FIG. 5, as in the vertical axis type aeration stirring apparatus 4 described in Patent Document 1, the straight line of the oxidation ditch tank 1 is used. A horizontal axis aeration and agitation device 8 is provided in the water channel A. Moreover, since the oxidation ditch tank 1 is usually installed outdoors, a ceiling portion 6 is provided in a snowy area or the like. An attachment port 7 for attaching the horizontal axis type aeration and stirring device 8 is formed in the ceiling portion 6. Further, 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, the vertical axis aeration apparatus is generally superior in aeration performance and maintainability compared to the horizontal axis / oblique axis aeration apparatus. There is a need to replace it with a shaft type aeration stirrer. Then, when replacing the existing horizontal axis type aeration and stirring apparatus with the vertical axis type aeration and stirring apparatus, there is a problem that it is desired to minimize the change of the existing part.
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。
When attaching the vertical axis type aeration and agitation device 4 from the attachment port 7 of the horizontal axis type aeration and agitation device 8, the inventor has a larger impeller diameter than the size of the attachment port 7. I discovered a new problem that I could not introduce inside.
As a result of intensive studies on the above problems, it has been found that by dividing the shaft of the vertical axis aeration stirrer, the mounting port 7 of the horizontal axis aeration agitator 8 can be used as it is to replace the vertical axis aeration agitator 4. The present invention has been completed.
Specifically, the present invention provides the following vertical axis type agitating device and a method for replacing the agitating device.
（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。
(First invention of the present application)
The first invention of the present application for solving the above problems is a vertical axis aeration and agitation device used for biological water treatment having an impeller and a shaft, wherein the shaft is a first shaft with an impeller, and the first A vertical axis aeration and agitation device, which is divided into a second shaft coupled to the shaft.
(The second invention of the present application)
A second invention of the present application for solving the above problem is the vertical axis aeration and agitation apparatus according to the first invention of the present application, wherein the length of the first shaft is smaller than the diameter of the impeller.
(The third invention of the present application)
A third invention of the present application for solving the above-mentioned problem comprises the vertical axis type aeration stirring apparatus according to the first or second invention of the present application, and a rectangular attachment port for attaching the aeration stirring apparatus. The length of one shaft is smaller than the length of the short side of the said rectangular attachment port, It is a biological water treatment apparatus characterized by the above-mentioned.
(The fourth invention of the present application)
A fourth invention of the present application for solving the above-mentioned problem is an aeration stirrer characterized in that the non-vertical aeration agitator is replaced with a vertical agitator through an attachment port of the non-vertical aeration agitator. 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 stirrer of the first invention of the present application, the first shaft with the impeller is separated from the gantry and the oxidation ditch is separated from a large opening separate from the mounting port for the horizontal axis aeration agitator. After being introduced into the tank, it can be attached to the mount from the inside of the attachment port. Therefore, a vertical axis | shaft type aeration stirring apparatus can be attached to an oxidation ditch tank, without processing to the magnitude | size which an impeller can pass the attachment port for horizontal axis type aeration stirring apparatuses.
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 and agitation devices 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 introducing the impeller in a vertical direction. The first shaft can be directly introduced from the mounting port for the horizontal axis type aeration and agitation device. Therefore, it is not necessary to move the first shaft with the impeller in the oxidation ditch tank, and the work of attaching is simplified.
Moreover, since it is not necessary to move the 1st shaft with an impeller in an oxidation ditch tank, it is also possible to attach a vertical axis | shaft type aeration stirring apparatus, without draining to-be-processed water from an 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 method for exchanging the aeration stirrer of the fourth invention of the present application, the non-vertical aeration stirrer can be replaced with the vertical aeration agitator through the attachment port for the non-vertical aeration agitator. The process of draining 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 examples, a vertical axis aeration stirrer of the present invention, a method for attaching the vertical axis aeration agitator, and a method of replacing the horizontal axis aeration agitator with a vertical axis aeration agitator 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 diagram showing the configuration of a vertical axis aeration and agitation apparatus 4 according to the first embodiment of the present invention. The vertical axis aeration and agitation device 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 gantry 10. In the present invention, since the impeller 43 and the first shaft are integrally fixed, even when simply denoted as “first shaft 41”, the impeller 43 and the first shaft represent those having the impeller 43 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 aeration and agitation device 4 is attached to the ceiling portion 6 of the oxidation ditch tank 1 through a gantry 10. The attachment port 7 of the ceiling part 6 is the one to which the horizontal axis aeration and 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。 Although the material of the impeller 43, the 1st shaft 41, and the 2nd shaft 42 is not specifically limited, Metal materials, such as stainless steel, are preferable from a viewpoint of intensity | strength and specific gravity. Furthermore, it is more preferable that it is stainless steel from a corrosive viewpoint.
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 ferrule via a connecting portion such as a flange. Bolts are preferred because they are resistant to stress in the rotational direction and can be easily attached.
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, a method for attaching the vertical axis type aeration and agitation device 4 of the present invention will be described. FIG. 2 is a schematic explanatory view showing a method of attaching the vertical axis type aeration and agitation device of the first embodiment of the present invention.
The ceiling portion 6 of the oxidation ditch tank 1 has an opening 9 that can be opened for maintenance and the like in addition to the attachment port 7 for attaching the horizontal axis type aeration and agitation 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 aeration and agitation device 4 of the present invention includes the step of separating the first shaft 41 with the impeller 43 from the second shaft 42 fixed to the gantry 10, and 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 through the opening 9 larger than the diameter of the impeller 43, and the first shaft 41 with the impeller 43. A step of transferring the inside of the oxidation ditch tank 1 to the lower side of the attachment port 7 and a 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 in the attachment port 7”, the gantry 10 to which the second shaft 42 is fixed bridges the attachment port 7 for the horizontal axis type aeration and stirring device. Installed. At this time, the flange of the second shaft 42 is directed in the internal 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 stirrer 4 and its mounting method of the present invention, construction for enlarging the mounting port 7 for the horizontal axis type aerator agitator for the vertical axis aeration agitator becomes unnecessary. The vertical axis 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 aeration and agitation device 8 and the vertical axis aeration and agitation device 4, a process of removing the treated water from the oxidation ditch tank 1 and a process of removing the horizontal axis aeration and agitation apparatus 8 from the attachment port 7. Then, the method of attaching the vertical axis aeration and stirring device 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 diagram showing a configuration of a vertical axis aeration and agitation apparatus according to a second embodiment of the present invention. The vertical axis aeration and agitation 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 length of the first shaft 41 in the axial direction 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 way, the first shaft 41 can be introduced into the oxidation ditch tank 1 through the attachment port 7 for the horizontal axis type aeration and stirring device. When the length of the first shaft 41 in the axial direction is equal to or longer than the length of the short side of the rectangular attachment port 7, it is introduced by rotating the first shaft 41 near the attachment port 7 (broken line). Arrow), the first shaft 41 can be introduced through the attachment 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 agitation device 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 agitation device of the second embodiment is the step of separating the first shaft 41 with the impeller 43 and the second shaft 42 fixed to the gantry 10, the first with the impeller 43. The step of introducing one shaft 41 into the oxidation ditch tank 1 through the attachment port 7 for the horizontal axis type aeration and stirring device, the connecting portion of the second shaft 42 and the connecting portion of the first shaft 41 with the impeller 43 And a step of installing the gantry 10 in the attachment 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 oxidation ditch tank 1 through the attachment port 7 for the horizontal axis type aeration and agitation device, the attachment method becomes simple.
Moreover, in the method of exchanging the horizontal axis type aeration and agitation device 8 and the vertical axis type aeration and agitation device 4, the process of draining the water to be treated from the oxidation ditch tank 1 can be omitted, and therefore a more simplified replacement method is provided. Can do.
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 agitation 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 device is a device for purifying organic sludge such as sewage sludge and organic waste water generated from food factories, pharmaceutical factories and the like by the action of aerobic microorganisms. In addition, it can be applied to large culture facilities such as algae that produce nutrients and biofuels.
Examples of the format include a cylindrical tank type aeration tank, a biological water treatment system in which a plurality of tanks are connected to perform a series of biological water treatments, and the like. A large biological water treatment device such as an oxidation ditch tank has a large impeller, which makes it difficult to replace and requires a lot of time to drain the water to be treated. The effect of the invention becomes remarkable and 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。
In addition, the method for replacing an aeration stirrer according to the present invention can be applied to any device as long as it is a biological water treatment apparatus in which a non-vertical vertical aeration stirrer is installed. In addition to the biological water treatment apparatus in which the horizontal axis type aeration stirrer of the example was installed, in the biological water treatment apparatus in which the oblique axis type aeration stirrer was installed, the oblique axis type aeration stirrer was The present invention can also be applied to a method of exchanging with a shaft type aeration stirrer.
The vertical axis aeration agitator of the present invention, its mounting method, and the replacement method from the non-vertical aeration agitator to the vertical aeration agitator are not necessarily applied to the mounting port smaller than the impeller, and the impeller Needless to say, it may be applied to a larger mounting opening.
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 aeration and agitation apparatus of the present invention can also be applied to a method of exchanging the shape of the impeller of the vertical axis aeration and agitation apparatus. The method of exchanging the shape of the impeller includes a step of removing the mount on which the vertical axis aeration and stirring device is fixed from the ceiling portion of the oxidation ditch tank, a step of lifting the mount, and the first shaft with the impeller from the second shaft. The step of removing, the step of connecting the first shaft with the impeller of different shape to the second shaft, the vertical axis aeration stirrer having the first shaft with the impeller of different shape is installed on the ceiling of the oxidation ditch tank The process to comprise is comprised.
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. This step is preferably performed 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。 Moreover, since the weight of a 1st shaft can be made small in the structure whose length of a 1st shaft is smaller than the diameter of an impeller, the 1st shaft for replacement | exchange can be produced cheaply.
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 agitation device of the present invention provides a third shaft for adjusting the length of the shaft between the first shaft and the second shaft, so that the impeller in the oxidation ditch tank It can also be applied to a 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 Perimeter wall, 3 Compartment wall, 4 Vertical axis | shaft type aeration stirring apparatus, 41 1st shaft, 42 2nd shaft, 43 impeller, 5 baffle board, 6 ceiling part, 7 attachment port, 8 horizontal axis Type aeration stirrer, 9 openings, 10 mounts, A straight channel, B circulation channel
Claims (4)
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。 In a vertical aeration agitator used for biological water treatment with an impeller and a shaft,
The vertical axis aeration and agitation apparatus according to claim 1, wherein the shaft is divided into a first shaft with an impeller and a second shaft connected to the first shaft.
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。 A vertical axis aeration stirrer according to claim 1 or 2,
A rectangular attachment port for attaching the aeration stirrer,
The biological water treatment apparatus according to claim 1, wherein a length of the first shaft is smaller than a length of a short side of the rectangular attachment port.
A method of exchanging an aeration stirrer, characterized by exchanging the non-vertical aeration stirrer with a vertical axis agitator through an attachment port of the non-vertical aeration stirrer.
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