WO2017010131A1 - Stirring apparatus and stirring method - Google Patents

Stirring apparatus and stirring method Download PDF

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Publication number
WO2017010131A1
WO2017010131A1 PCT/JP2016/060501 JP2016060501W WO2017010131A1 WO 2017010131 A1 WO2017010131 A1 WO 2017010131A1 JP 2016060501 W JP2016060501 W JP 2016060501W WO 2017010131 A1 WO2017010131 A1 WO 2017010131A1
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Prior art keywords
blade
stirring
tank
rotation
rotating
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PCT/JP2016/060501
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French (fr)
Japanese (ja)
Inventor
好一 加藤
直樹 岸
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佐竹化学機械工業株式会社
メタウォーター株式会社
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Publication of WO2017010131A1 publication Critical patent/WO2017010131A1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/80—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application

Definitions

  • the present invention is an agitation device and an agitation method, such as a digester tank for treating raw sludge, surplus sludge, and garbage by methane fermentation, an agitator tank for stirring a mixture of liquid and slurry, a flat tank, etc. It is the stirring apparatus and stirring method used. Moreover, the stirring apparatus and stirring method of this invention are related with the stirring apparatus and stirring method which can be applied with respect to various stirring, such as liquid stirring, solid-liquid stirring, and gas-liquid stirring.
  • the sludge to be added contains inorganic solids and has a high sedimentation property. When these solids settle and accumulate at the bottom, the effective capacity in the digestion tank is reduced, and the digestibility is adversely affected.
  • FIG. 10 shows a stirring device a applied to a conventional biological treatment that solves the above-mentioned problems.
  • the stirring device a includes a cylindrical stirring vessel b, a plurality of radially extending stationary blades c provided at the bottom of the stirring vessel b, and an upper portion of the stationary blade c, provided near the lower part of the liquid level.
  • the rotary blade d includes, for example, four blade bodies e extending radially.
  • the blade body e is a straight rectangular strip-shaped flat paddle blade having a surface perpendicular to the rotation direction of the rotary blade d.
  • the conventional stirring device a can be operated with low shear and low power without damaging the carrier in the tank b. Moreover, in the said conventional stirring apparatus a, the inside of the stirring tank b can be stirred very uniformly and easily (patent document 1).
  • the conventional stirring device can be operated with low power, but in recent years, it is required to have lower power and the same stirring performance as in the past.
  • the present invention is a further improvement of the conventional stirring device, and an object thereof is to provide a stirring device with lower power and capable of stirring the inside of the stirring tank extremely uniformly.
  • the stirring device of the present invention comprises a stirring tank, a rotating blade provided in the stirring tank, and a radially extending stationary blade provided at the bottom of the stirring tank, and the rotating blade has one or more flat tapers. It consists of wings.
  • the flat taper blade is characterized in that the outer shape thereof is a shape in which the area gradually decreases outward from the rotation shaft of the stirring blade.
  • the flat tapered blade has a flat tapered blade whose outer shape is slanted linearly toward the upper side extending in the horizontal direction, the outer side extending in the vertical direction, the inner side extending in the vertical direction, and outward. It consists of a lower side extending upward.
  • the image forming apparatus further includes a rotation control device that controls the rotation of the rotor blades.
  • the rotation control device is a control device that changes a rotation speed of the rotor blade.
  • the stirring method of the present invention includes a stirring tank, a rotary blade composed of one or a plurality of flat taper blades provided in the stirring tank, a radially extending stationary blade provided at the bottom of the stirring tank, With the rotation control device of the stirring device comprising the rotation control device that controls the rotation of the rotor blades, at the first desired stirring rotation speed to such an extent that deposits such as slurry are generated at the bottom of the stirring tank, The first step of rotating the rotor blade for the first desired time, and the deposit accumulated at the bottom of the tank, which has been accelerated from the first stirring speed for the second desired time, is raised. A second step of rotating the rotor blade at a second stirring rotational speed, and a third step of repeating the first step and the second step as necessary. .
  • the rotation control device is a control device for rotating the rotating blades forward and backward.
  • the flat taper blade is provided so as to be tiltable with respect to the rotating shaft of the rotor blade.
  • the specific gravity of the flat tapered blade is smaller than the specific gravity of the liquid to be treated contained in the stirring tank.
  • the inside of the agitation tank can be agitated extremely uniformly and easily, and can be operated with lower power.
  • the wing body flat taper wing
  • the opening of the stirring tank can be made smaller.
  • it can apply also to a stirring tank with a small opening part.
  • the upward flow at the center in the tank can be discharged more effectively outward by the wing body (flat taper wing) than the conventional wing body.
  • the amount can be increased and the flow velocity at the bottom of the tank can be increased.
  • the same discharge amount or the same flow rate at the bottom of the layer can be obtained with a low power.
  • the average power can be reduced below the conventional level.
  • the opening of the stirring tank can be made small. Or according to this invention, it can apply also to a stirring tank with a small opening part. Or according to this invention, it becomes easy to take in and out from the opening part of a stirring tank, and a maintenance becomes easy.
  • FIG. 2 is a plan view taken along a line II in FIG. 1. It is an expansion front view for description of a wing body. It is a vertical front view for description of a conventional flat paddle blade. It is a vertical front view for description of the flat tarper wing of the present invention. It is a graph which shows the relationship between Reynolds number and power number. It is a vertical front view of the stirring apparatus of the other Example of Example 1 of this invention. It is an expansion front view for description of the rotary blade of Example 2 of the present invention. It is an expansion front view for description of the rotary blade of Example 2 of the present invention. It is a vertical front view of the conventional stirring apparatus.
  • Embodiment 1 of the present invention will be described with reference to FIGS.
  • Example 1 shows the stirring apparatus of Example 1 of the present invention.
  • 2 is a stirring tank of the stirring device 1, and the stirring tank 2 is formed in, for example, a vertical cylindrical shape, an elliptical cylindrical shape or a rectangular cylindrical shape having a diameter of 20 m.
  • An opening 3 and a lid 4 of the opening 3 are provided at the center of the ceiling 2 a of the stirring tank 2.
  • the rotor blade 5 indicates a rotor blade, and the rotor blade 5 is composed of, for example, four blades 6 that are radially fixed to the lower end of the rotating shaft 5a radially outward via a boss portion 5b.
  • the rotating shaft 5 a is provided so as to hang coaxially with the central axis of the stirring tank 2 and penetrate the lid portion 4. Further, the rotary blade 5 is inserted into the agitation tank 2.
  • the blade plate 6 is formed of a trapezoidal flat taper blade having a surface perpendicular to the rotation direction of the rotating shaft 5a. Further, the outer shape of the blade plate 6 is a shape in which the area gradually decreases outward from the rotating shaft 5a, for example, an upper side 6a extending in the horizontal direction, and an outer side 6b extending in the vertical direction, The inner side 6c extends in the vertical direction and the lower side 6d extends obliquely upward in a straight line toward the outside.
  • the stationary blade 8 indicates a stationary blade.
  • the stationary blade 8 is composed of, for example, a straight belt-like plate, and the belt-like plate is fixed, for example, four in a radial manner at the center of the bottom portion 2b in the agitation tank 2, and intersects the belt-like plates.
  • a gap is formed at the center of the bottom corresponding to the portion.
  • the liquid to be treated in the agitation tank 2 used as a digestion tank containing wastewater containing raw sludge, surplus sludge, raw garbage, etc., and a liquid to be treated that treats the wastewater and causes methane fermentation, etc. 1, the liquid to be treated generates a swirling flow along the inner peripheral surface of the agitation tank 2 that goes downward as shown in FIG. 1 and rises at the center by the stationary blade 8 of the bottom 2b.
  • the liquid to be treated circulates in the stirring tank.
  • the blade 6 made of the flat tapered blade of the present application can reduce the power number (Np) of the blade body as compared with the conventional flat paddle blade e.
  • the motor output (P) for rotating the rotor blades can be expressed by the power number (Np) ⁇ the number of rotations (N) 3 ⁇ the blade diameter (d) 5. Therefore, the motor output (P) is assumed to be constant. In this case, the rotational speed (N) can be increased by decreasing the power number (Np).
  • the flow rate at the bottom of the stirring tank is important, and this flow rate is related to the blade tip speed of the blade, and the blade of the blade
  • the blade plate 6 made of the flat taper blade of the present invention is used so that the blade plate 6 having a blade diameter narrower than the blade diameter of the conventional flat taper blade is used. Can do. Therefore, it is possible to effectively reduce the motor output (power) while maintaining the stirring effect of the conventional flat paddle blade e.
  • the upflow is generated at the center of the bottom of the tank using the stationary blade 8, so that the base portion of the blade plate 6 composed of flat tapered blades has a large area.
  • the liquid to be stirred can be discharged more effectively in the radial direction.
  • the case where stirring is performed using both the stationary blade 8 and the flat tapered blade is performed under the same conditions in the radial direction.
  • the discharge amount can be increased and the flow velocity at the bottom of the layer can be increased. Therefore, when comparing the case where only the flat taper blade is used with the case where both the stationary blade 8 and the flat taper blade are used under the condition that the flow velocity at the bottom of the layer is the same, the flat taper blade is Since the blade diameter can be reduced, the power can be reduced more effectively due to the effect of reducing the blade diameter.
  • a wing body having a small blade diameter while maintaining the same level of agitation performance as that of a conventional flat paddle blade agitation device, so that the power can be lower than in the past.
  • FIG. 4 to FIG. 6 an example of a conventional flat paddle blade and an example of a flat taper blade of the present invention will be described in comparison.
  • the flow rate at the bottom of the stirring tank is important, the flow rate is low power,
  • the flow velocity at which deposits do not accumulate at the bottom of the agitation tank is the optimum flow velocity (fluidization reference velocity). Such a flow velocity is approximately proportional to the area of the wing.
  • FIG. 1 An example of an optimal conventional flat paddle blade is shown in FIG. 1
  • the flat paddle blade is flat paddle when the stirring tank diameter D is 12 m, the distance h from the water surface to the flat paddle blade is 1.5 m, the stationary blade diameter is 3.4 m, and the blade width is 0.8 m.
  • the blade diameter d of the blade is 4.2 m and the blade width b is 1.1 m. Note that the tip peripheral speed of the blade necessary to obtain a speed of 10 cm / s or more which is the fluidization reference speed at the bottom of the tank was Vyip ⁇ 1.05 m / s.
  • FIG. 1 An example of the flat taper wing of the present invention is shown in FIG.
  • the flat tapered blade has a blade diameter when the stirring tank diameter D is 12 m, the distance h from the water surface to the flat paddle blade is 1.1 m, the stationary blade diameter is 3.4 m, and the blade width is 0.8 m.
  • the tip peripheral speed of the blade necessary to obtain a speed of 10 cm / s or more as the fluidization reference speed at the bottom of the tank was Vyip ⁇ 1.10 m / s.
  • FIG. 6 shows the power number (Np) of the conventional flat paddle blade and the power number of the flat taper blade of the present invention when the Reynolds number (Re) is changed in the flat digester.
  • required by experiment is shown.
  • the power number (Np) of the blade diameter (4.0 m) of the flat tapered blade of the present invention is lower than the blade diameter (4.2 m) of the conventional flat paddle blade.
  • the flat taper blade of the present invention has the same fluidization reference speed at the bottom of the tank, although the blade diameter, blade area, and blade weight are smaller than those of the conventional flat paddle blade.
  • the flat taper blade can reduce the power number and the tip peripheral speed can be increased, but the blade diameter can be reduced as compared with the flat paddle blade. Therefore, the power number (Np)
  • the motor output (P) represented by ⁇ rotational speed (N) 3 ⁇ blade diameter (d) 5 can be reduced. Accordingly, it can be said that the flat taper blade is superior in both the initial cost of the product and the running cost of the power consumption.
  • the horizontal diameter of the blade body 6 of the flat taper blade of the present invention is 6 m, compared to a blade body having a horizontal diameter of a conventional flat paddle blade e of, for example, 9 m, substantially the same stirring performance is exhibited. Can do.
  • the diameter of the opening 3 of the agitation tank 2 can be designed to be smaller than the conventional one. Further, a stirring tank 2 having a small opening 3 can be used. Further, the rotary blade 5 can be easily taken out from the opening 3 of the stirring tank 2.
  • the motor 7 is provided with a rotation control device 9 having an inverter device, a variable transmission device, and the like, and the rotation control device 9 periodically changes the rotation speed of the rotor blade 5. Or rotating the rotor blades forward and backward.
  • the first desired amount is such that deposits such as slurry are generated on the tank bottom 2 b in a range that does not affect the digestibility during normal times.
  • the rotary blade 5 is rotated at a stirring rotational speed for a first desired time. Then, after the first desired time has elapsed, the rotary blade 5 is rotated at a second stirring rotational speed that is higher than the first stirring rotational speed by a second desired time, The accumulated deposits are raised and the tank is made uniform.
  • the stirring blade 5 is rotated at the first stirring rotational speed at the normal time only for the first desired time, and the After the first desired time has elapsed, the rotary blade 5 is rotated at the second desired stirring rotational speed only for the second desired time, and the sediment accumulated in the tank bottom 2b is raised, The inside of the tank is made uniform, and this is repeated as necessary.
  • the operation time in the first desired time in the normal time is lengthened, the low speed operation in which the operation time is long, and the operation time in the second desired time is shortened, and the speed-up operation in which the operation time is short.
  • the average power can be reduced below the conventional level.
  • the rotation control device 9 may periodically rotate the stirring blade 5 in the reverse direction.
  • the pivotal support point in which the base portion of each blade 6 of the rotary blade 5 in the first embodiment is provided on the boss portion 5b of the rotary shaft 5a.
  • the blades 6 are connected so as to be tiltable in the vertical direction (around the axis extending in the radial direction) via 10 and the material of each blade 6 is made to have a specific gravity smaller than the specific gravity of the liquid to be treated.
  • a tilt prevention unit 11 is provided to prevent the blade plate 6 from tilting more than a desired tilt angle.
  • the rotor blades 5 when the rotor blades 5 are not inserted into the liquid to be treated, the rotor blades 5 are moved downward by gravity as shown in FIG. It hangs down and becomes a folded state.
  • the blades 6 are tilted to a desired inclination angle when the rotary blades 5 are rotated, for example, when the blades are opened horizontally, the upper ends of the blades 6 are moved to the tilt prevention unit 11. And the tilting of the blades 6 is prevented, and the blades 6 can be opened at a desired tilt angle when the blades 6 are rotated.
  • a restricting means for restricting the rotational direction of the blade plate 6 as necessary. May be provided. *
  • the inside of the stirring tank 2 can be stirred by rotating the rotary blade 5.
  • the rotating blade 5 is folded even when the blade diameter of the rotating blade 5 during rotation is larger than the opening diameter of the opening 3 of the stirring tank 2.
  • the rotor blade 5 can be inserted into the tank.
  • the blade plate 6 is opened at a desired inclination angle by the centrifugal force. Also good.
  • a weight (not shown) may be provided on each blade 6 so that the blade 6 can be easily opened by the centrifugal force generated by the rotation of the rotary blade 5.
  • the second embodiment can be applied to a conventional flat paddle blade.

Abstract

[Problem] The purpose of the present invention is to provide a stirring apparatus that requires less power and that can extremely uniformly stir the interior of a stirring tank. [Solution] The present invention includes a stirring tank 2, a rotor blade 5 provided in the stirring tank 2, and stator blades 8 that are provided at the bottom of the stirring tank 2 and that extend radially, and is characterized in that the rotor blade 5 includes one or more flat tapered blades 6.

Description

撹拌装置及び撹拌方法Stirring apparatus and stirring method
　本発明は撹拌装置及び撹拌方法であり、例えば、生汚泥や余剰汚泥や生ゴミをメタン発酵させて処理する消化槽や、液体とスラリーが混在した液体を撹拌する撹拌槽や、扁平槽などに用いられる撹拌装置及び撹拌方法である。また、本発明の撹拌装置及び撹拌方法は、液体撹拌、固液撹拌、気液撹拌等の種々の撹拌に対して適用可能な撹拌装置及び撹拌方法に関するものである。 The present invention is an agitation device and an agitation method, such as a digester tank for treating raw sludge, surplus sludge, and garbage by methane fermentation, an agitator tank for stirring a mixture of liquid and slurry, a flat tank, etc. It is the stirring apparatus and stirring method used. Moreover, the stirring apparatus and stirring method of this invention are related with the stirring apparatus and stirring method which can be applied with respect to various stirring, such as liquid stirring, solid-liquid stirring, and gas-liquid stirring.
　例えば、消化槽内の撹拌においては、槽内を均一に保ち、消化率（有機物分解率）を維持することが、必要となる性能の一つである。合わせて、投入する汚泥には無機物の固形分等が含まれており、沈降性が高い。それら固形物が底部に沈降し堆積することで、消化槽内の有効容量が低下し、消化率に悪影響を及ぼす。 For example, in the agitation in the digestion tank, one of the required performances is to keep the inside of the tank uniform and maintain the digestibility (organic matter decomposition rate). In addition, the sludge to be added contains inorganic solids and has a high sedimentation property. When these solids settle and accumulate at the bottom, the effective capacity in the digestion tank is reduced, and the digestibility is adversely affected.
　また、槽内底部に堆積物が発生することは、槽内点検時の点検作業の妨げとなる。また、槽内底部に堆積物が発生することは、必要に応じて堆積物除去（浚渫）する手間が増加すること、或いは状況によっては廃棄物処理が必要になることなど、コストが増加する問題がある。 In addition, the occurrence of deposits at the bottom of the tank hinders the inspection work during the tank inspection. In addition, the occurrence of deposits at the bottom of the tank is a problem that costs increase due to an increase in the effort to remove (saddle) deposits as necessary, or in some situations, waste disposal is required. There is.
　そこで、槽内底部に堆積物を発生させずに撹拌することが求められるが、撹拌強度を増加することは撹拌動力の増加につながってしまう。 Therefore, it is required to stir without generating deposits in the bottom of the tank, but increasing the stirring strength leads to an increase in stirring power.
　図１０は、前記の問題点を解決した従来の生物処理に適用する撹拌装置ａを示す。該撹拌装置ａは、円筒状の撹拌槽ｂと、該撹拌槽ｂ内の底部に設けた放射状に延びる複数の静翼ｃと、該静翼ｃの上部であって、液面下方付近に設けた、放射状に延びる、例えば４枚の翼体ｅからなる回転翼ｄとよりなる。また、該翼体ｅは、前記回転翼ｄの回転方向に対して直角な面を有する、直線の矩形状の帯板状のフラットパドル翼よりなる。 FIG. 10 shows a stirring device a applied to a conventional biological treatment that solves the above-mentioned problems. The stirring device a includes a cylindrical stirring vessel b, a plurality of radially extending stationary blades c provided at the bottom of the stirring vessel b, and an upper portion of the stationary blade c, provided near the lower part of the liquid level. In addition, the rotary blade d includes, for example, four blade bodies e extending radially. The blade body e is a straight rectangular strip-shaped flat paddle blade having a surface perpendicular to the rotation direction of the rotary blade d.
　前記従来の撹拌装置ａにおいては、槽ｂ内の担体にダメージを与えることなく、低せん断、低動力にて運転が可能である。また、前記従来の撹拌装置ａにおいては、撹拌槽ｂ内を極めて均一に、且つ容易に撹拌できる（特許文献１）。 The conventional stirring device a can be operated with low shear and low power without damaging the carrier in the tank b. Moreover, in the said conventional stirring apparatus a, the inside of the stirring tank b can be stirred very uniformly and easily (patent document 1).
特開平７－６００９３号公報Japanese Patent Laid-Open No. 7-60093
　前記従来の撹拌装置は、低動力にて運転が可能であるが、近年においては、更に低動力で、かつ、従来同様の撹拌性能を要求される。 The conventional stirring device can be operated with low power, but in recent years, it is required to have lower power and the same stirring performance as in the past.
　本発明は、前記従来の撹拌装置を更に改良したもので、より低動力で、かつ、撹拌槽内を極めて均一に撹拌できる撹拌装置を提供することを目的とする。 The present invention is a further improvement of the conventional stirring device, and an object thereof is to provide a stirring device with lower power and capable of stirring the inside of the stirring tank extremely uniformly.
　本発明の撹拌装置は、撹拌槽と、該撹拌槽内に設けた回転翼と、該撹拌槽の底部に設けた放射状に延びる静翼とよりなり、前記回転翼は、１又は複数のフラットテーパー翼からなることを特徴とする。 The stirring device of the present invention comprises a stirring tank, a rotating blade provided in the stirring tank, and a radially extending stationary blade provided at the bottom of the stirring tank, and the rotating blade has one or more flat tapers. It consists of wings.
　また、前記フラットテーパー翼は、その外形形状が、前記撹拌翼の回転軸から外方に向かって徐々に面積が小さくなる形状であることを特徴とする。 Further, the flat taper blade is characterized in that the outer shape thereof is a shape in which the area gradually decreases outward from the rotation shaft of the stirring blade.
　また、前記フラットテーパー翼は、該フラットテーパー翼の外形形状が、水平方向に延びる上側辺と、垂直方向に延びる外側辺と、垂直方向に延びる内側辺と、外方に向かって直線状に斜め上方に延びる下側辺とよりなることを特徴とする。 Further, the flat tapered blade has a flat tapered blade whose outer shape is slanted linearly toward the upper side extending in the horizontal direction, the outer side extending in the vertical direction, the inner side extending in the vertical direction, and outward. It consists of a lower side extending upward.
　また、前記回転翼の回転を制御する回転制御装置を更に有することを特徴とする。 Further, the image forming apparatus further includes a rotation control device that controls the rotation of the rotor blades.
　また、前記回転制御装置は、前記回転翼の回転速度を変化させる制御装置であることを特徴とする。また、本発明の撹拌方法は、撹拌槽と、該撹拌槽内に設けた、１又は複数のフラットテーパー翼からなる回転翼と、該撹拌槽の底部に設けた放射状に延びる静翼と、前記回転翼の回転を制御する回転制御装置とよりなる攪拌装置の前記回転制御装置により、上記撹拌槽内底部にスラリー等の堆積物の堆積が発生する程度の第１の所望の撹拌回転数で、第１の所望の時間だけ、前記回転翼を回転させる第一の工程と、第２の所望の時間だけ前記第１の撹拌回転数より増速した、槽内底部に貯まった前記堆積物を上昇させる第２の撹拌回転数で前記回転翼を回転させる第二の工程と、必要に応じて、上記第一の工程と上記第二の工程を繰り返す第三の工程とよりなることを特徴とする。 Further, the rotation control device is a control device that changes a rotation speed of the rotor blade. Further, the stirring method of the present invention includes a stirring tank, a rotary blade composed of one or a plurality of flat taper blades provided in the stirring tank, a radially extending stationary blade provided at the bottom of the stirring tank, With the rotation control device of the stirring device comprising the rotation control device that controls the rotation of the rotor blades, at the first desired stirring rotation speed to such an extent that deposits such as slurry are generated at the bottom of the stirring tank, The first step of rotating the rotor blade for the first desired time, and the deposit accumulated at the bottom of the tank, which has been accelerated from the first stirring speed for the second desired time, is raised. A second step of rotating the rotor blade at a second stirring rotational speed, and a third step of repeating the first step and the second step as necessary. .
　また、前記回転制御装置は、前記回転翼の回転を正逆回転させる制御装置であることを特徴とする。 Further, the rotation control device is a control device for rotating the rotating blades forward and backward.
　また、前記回転翼の回転軸に対して、前記フラットテーパー翼を傾動自在に設けることを特徴とする。 Further, the flat taper blade is provided so as to be tiltable with respect to the rotating shaft of the rotor blade.
　また、前記フラットテーパー翼の比重は、前記撹拌槽内に容れられる被処理液の比重よりも、小さいことを特徴とする。 The specific gravity of the flat tapered blade is smaller than the specific gravity of the liquid to be treated contained in the stirring tank.
　本発明によれば、撹拌槽内を極めて均一に、且つ容易に撹拌できると共に、より低動力で運転が可能となる。 According to the present invention, the inside of the agitation tank can be agitated extremely uniformly and easily, and can be operated with lower power.
　また、本発明によれば、従来の翼体に比べて、翼体（フラットテーパー翼）を小さくできるので、撹拌槽の開口部を小さくできる。又は、本発明によれば、開口部が小さい撹拌槽にも適用することができる。或いは、本発明によれば、撹拌槽の開口部からの出し入れがしやすくなり、メンテナンスが容易となる。 Also, according to the present invention, since the wing body (flat taper wing) can be made smaller than the conventional wing body, the opening of the stirring tank can be made smaller. Or according to this invention, it can apply also to a stirring tank with a small opening part. Or according to this invention, it becomes easy to take in and out from the opening part of a stirring tank, and a maintenance becomes easy.
　また、本発明によれば、従来の翼体に比べて、槽内中央部の上昇流を、前記翼体（フラットテーパー翼）により、より効果的に外方に吐出することができるので、吐出量を大きくできると共に、槽底部における流速を高めることができる。また、本発明によれば、従来の翼体よりも小さい翼体を用いても、低動力で、従来の翼体と同じ吐出量或いは層底部における流速を同じにすることができる。 Further, according to the present invention, the upward flow at the center in the tank can be discharged more effectively outward by the wing body (flat taper wing) than the conventional wing body. The amount can be increased and the flow velocity at the bottom of the tank can be increased. Further, according to the present invention, even if a wing body smaller than the conventional wing body is used, the same discharge amount or the same flow rate at the bottom of the layer can be obtained with a low power.
　また、本発明によれば、回転翼の回転を制御することにより、平均的な動力を従来以下とすることができるようになる。 Further, according to the present invention, by controlling the rotation of the rotor blades, the average power can be reduced below the conventional level.
　また、本発明によれば、回転翼を折り畳むことができるので、撹拌槽の開口部を小さくできる。又は、本発明によれば、開口部が小さい撹拌槽にも適用することができる。或いは、本発明によれば、撹拌槽の開口部からの出し入れがしやすくなり、メンテナンスが容易となる。 Further, according to the present invention, since the rotary blade can be folded, the opening of the stirring tank can be made small. Or according to this invention, it can apply also to a stirring tank with a small opening part. Or according to this invention, it becomes easy to take in and out from the opening part of a stirring tank, and a maintenance becomes easy.
本発明の実施例１の撹拌装置の縦断正面図である。It is a vertical front view of the stirring apparatus of Example 1 of this invention. 図１のＩ－Ｉ線截平面図である。FIG. 2 is a plan view taken along a line II in FIG. 1. 翼体の説明用拡大正面図である。It is an expansion front view for description of a wing body. 従来のフラットパドル翼の説明用縦断正面図である。It is a vertical front view for description of a conventional flat paddle blade. 本発明のフラットターパー翼の説明用縦断正面図である。It is a vertical front view for description of the flat tarper wing of the present invention. レイノルズ数と動力数との関係を示すグラフである。It is a graph which shows the relationship between Reynolds number and power number. 本発明の実施例１の他の実施例の撹拌装置の縦断正面図である。It is a vertical front view of the stirring apparatus of the other Example of Example 1 of this invention. 本発明の実施例２の回転翼の説明用拡大正面図である。It is an expansion front view for description of the rotary blade of Example 2 of the present invention. 本発明の実施例２の回転翼の説明用拡大正面図である。It is an expansion front view for description of the rotary blade of Example 2 of the present invention. 従来の撹拌装置の縦断正面図である。It is a vertical front view of the conventional stirring apparatus.
　本発明の実施するための形態の実施例を以下に示す。 Examples of modes for carrying out the present invention are shown below.
　本発明の実施例１を図１乃至図３により説明する。 Embodiment 1 of the present invention will be described with reference to FIGS.
　１は、本発明の実施例１の撹拌装置を示す。２は、該撹拌装置１の撹拌槽であり、該撹拌槽２は、例えば、直径２０ｍの縦型の円筒状、楕円筒状又は矩形筒状に形成される。また、該撹拌槽２の天井部２ａの中央部には、開口部３と、該開口部３の蓋部４が設けられている。 1 shows the stirring apparatus of Example 1 of the present invention. 2 is a stirring tank of the stirring device 1, and the stirring tank 2 is formed in, for example, a vertical cylindrical shape, an elliptical cylindrical shape or a rectangular cylindrical shape having a diameter of 20 m. An opening 3 and a lid 4 of the opening 3 are provided at the center of the ceiling 2 a of the stirring tank 2.
　５は、回転翼を示し、該回転翼５は、回転軸５ａの下端にボス部５ｂを介して半径方向外方に放射状に固定した、例えば、４枚の翼板６からなる。また、前記回転軸５ａは、前記撹拌槽２の中心軸と同軸に垂下し、前記蓋部４を貫通して設けられる。また、前記回転翼５は、前記撹拌槽２内に挿入されている。 5 indicates a rotor blade, and the rotor blade 5 is composed of, for example, four blades 6 that are radially fixed to the lower end of the rotating shaft 5a radially outward via a boss portion 5b. The rotating shaft 5 a is provided so as to hang coaxially with the central axis of the stirring tank 2 and penetrate the lid portion 4. Further, the rotary blade 5 is inserted into the agitation tank 2.
　また、前記翼板６は、前記回転軸５ａの回転方向に対して直角な面を有する、台形板状のフラットテーパー翼よりなる。また、該翼板６の外形形状は、回転軸５ａから外方に向かって徐々に面積が小さくなる形状であり、例えば、水平方向に延びる上側辺６ａと、垂直方向に延びる外側辺６ｂと、垂直方向に延びる内側辺６ｃと、外方に向かって直線状に斜め上方に延びる下側辺６ｄとよりなる。 The blade plate 6 is formed of a trapezoidal flat taper blade having a surface perpendicular to the rotation direction of the rotating shaft 5a. Further, the outer shape of the blade plate 6 is a shape in which the area gradually decreases outward from the rotating shaft 5a, for example, an upper side 6a extending in the horizontal direction, and an outer side 6b extending in the vertical direction, The inner side 6c extends in the vertical direction and the lower side 6d extends obliquely upward in a straight line toward the outside.
　そして、前記回転翼５は、前記撹拌槽２の上方に設けたモータ７の駆動により、前記回転軸５ａを介して、該撹拌槽２内の被処理液内の液面近傍において回転するようにした。 And the said rotary blade 5 is rotated by the drive of the motor 7 provided above the said stirring tank 2 via the said rotating shaft 5a in the liquid surface vicinity in the to-be-processed liquid in this stirring tank 2. As shown in FIG. did.
　８は、静翼を示す。該静翼８は、例えば、直線状の帯状板からなり、該帯状板は、前記撹拌槽２内の底部２ｂの中心部に放射状に、例えば、４枚固定されると共に、これら帯状板の交差部に相当する該底部の中心部には隙間が形成されている。 8 indicates a stationary blade. The stationary blade 8 is composed of, for example, a straight belt-like plate, and the belt-like plate is fixed, for example, four in a radial manner at the center of the bottom portion 2b in the agitation tank 2, and intersects the belt-like plates. A gap is formed at the center of the bottom corresponding to the portion.
　次に本発明の撹拌装置の作用と効果を説明する。 Next, the operation and effect of the stirring device of the present invention will be described.
　例えば、生汚泥や余剰汚泥や生ゴミなどを含む排水と該排水を処理してメタン発酵をさせる微生物などを含んだ被処理液が容れられた消化槽として使用する撹拌槽２において、前記回転翼５を回転すれば、前記被処理液は、図１に示すように、下方に向かう、前記撹拌槽２の内周面に沿う旋回流を生ずると共に、底部２ｂの静翼８により中心部で上昇流を生じ、該被処理液は、前記撹拌槽内で循環するようになる。 For example, in the agitation tank 2 used as a digestion tank containing wastewater containing raw sludge, surplus sludge, raw garbage, etc., and a liquid to be treated that treats the wastewater and causes methane fermentation, etc. 1, the liquid to be treated generates a swirling flow along the inner peripheral surface of the agitation tank 2 that goes downward as shown in FIG. 1 and rises at the center by the stationary blade 8 of the bottom 2b. The liquid to be treated circulates in the stirring tank.
　ところで、本願のフラットテーパー翼からなる翼板６は、従来のフラットパドル翼ｅに比べて、翼体の動力数（Ｎｐ）を下げることができる。 By the way, the blade 6 made of the flat tapered blade of the present application can reduce the power number (Np) of the blade body as compared with the conventional flat paddle blade e.
　ここで、一般に、回転翼を回転させるためのモータ出力（Ｐ）は、動力数（Ｎｐ）×回転数（Ｎ）３×翼径（ｄ）５で表せるので、モータ出力（Ｐ）を一定とした場合、動力数（Ｎｐ）を下げることにより、回転数（Ｎ）を上げることができる。 Here, in general, the motor output (P) for rotating the rotor blades can be expressed by the power number (Np) × the number of rotations (N) 3 × the blade diameter (d) 5. Therefore, the motor output (P) is assumed to be constant. In this case, the rotational speed (N) can be increased by decreasing the power number (Np).
　また、撹拌槽底部に堆積物が堆積しないように撹拌槽内を撹拌するためには、撹拌槽底部における流速が重要であり、該流速は、翼の翼先端速度と関係し、該翼の翼先端速度（ＶTip＝Ｎ×ｄ×π）を一定とした場合には、回転数（Ｎ）を上げることにより、翼径（ｄ）を下げることができる。 Further, in order to stir the inside of the stirring tank so that deposits do not accumulate at the bottom of the stirring tank, the flow rate at the bottom of the stirring tank is important, and this flow rate is related to the blade tip speed of the blade, and the blade of the blade When the tip speed (VTip = N × d × π) is constant, the blade diameter (d) can be decreased by increasing the rotational speed (N).
　以上より、モータ出力（Ｐ）は、回転数（Ｎ）の三乗に比例し、翼径（ｄ）の五乗に比例することから、従来のフラットパドル翼と本願のフラットテーパー翼の翼先端速度（ＶRip）を同じにした場合、回転数（Ｎ）を上げることにより動力（Ｐ）が上がる効果よりも、翼径（ｄ）を小さくすることにより動力（Ｐ）を下げる効果の方が大きい。 From the above, since the motor output (P) is proportional to the third power of the rotation speed (N) and proportional to the fifth power of the blade diameter (d), the blade tip of the conventional flat paddle blade and the flat taper blade of the present application When the speed (VRip) is the same, the effect of decreasing the power (P) by reducing the blade diameter (d) is greater than the effect of increasing the power (P) by increasing the rotational speed (N). .
　従って、従来のフラットパドル翼ｅを用いる代わりに、本願発明のフラットテーパー翼からなる翼板６を用いることにより、従来のフラットテーパー翼の翼径よりも翼径の狭い該翼板６を用いることができる。そのため、従来のフラットパドル翼ｅの撹拌効果を維持しつつ、効果的に、モータ出力（動力）を下げることができるようになる。 Therefore, instead of using the conventional flat paddle blade e, the blade plate 6 made of the flat taper blade of the present invention is used so that the blade plate 6 having a blade diameter narrower than the blade diameter of the conventional flat taper blade is used. Can do. Therefore, it is possible to effectively reduce the motor output (power) while maintaining the stirring effect of the conventional flat paddle blade e.
　更に、本発明の撹拌装置においては、静翼８を用いて、槽内底部の中心部で上昇流を生じさせているため、フラットテーパー翼からなる翼板６の基部部分の面積の広い部分で、該上昇流を受け、より効果的に、被撹拌液を半径方向に吐出することができる。 Furthermore, in the stirring device of the present invention, the upflow is generated at the center of the bottom of the tank using the stationary blade 8, so that the base portion of the blade plate 6 composed of flat tapered blades has a large area. In response to the upward flow, the liquid to be stirred can be discharged more effectively in the radial direction.
　従って、静翼８を用いずに、フラットテーパー翼のみを用いて撹拌した場合に比べて、静翼８とフラットテーパー翼の双方を用いて撹拌した場合の方が、同条件で半径方向への吐出量を増やすことができると共に、層底部における流速を高めることができる。従って、層底部における流速を同じにするという条件で、フラットテーパー翼のみを用いた場合と、静翼８とフラットテーパー翼の双方を用いた場合とを比較した場合、該フラットテーパー翼の方が翼径を小さくすることができるので、翼径を小さくできる効果により、更に効果的に、動力を下げることができるようになる。 Therefore, compared to the case where stirring is performed using only the flat tapered blade without using the stationary blade 8, the case where stirring is performed using both the stationary blade 8 and the flat tapered blade is performed under the same conditions in the radial direction. The discharge amount can be increased and the flow velocity at the bottom of the layer can be increased. Therefore, when comparing the case where only the flat taper blade is used with the case where both the stationary blade 8 and the flat taper blade are used under the condition that the flow velocity at the bottom of the layer is the same, the flat taper blade is Since the blade diameter can be reduced, the power can be reduced more effectively due to the effect of reducing the blade diameter.
　本発明によれば、従来のフラットパドル翼の撹拌装置と同程度の撹拌性能を維持しつつ、翼径の小さい翼体を用いることができるので、従来よりも低動力とすることができるようになる。 According to the present invention, it is possible to use a wing body having a small blade diameter while maintaining the same level of agitation performance as that of a conventional flat paddle blade agitation device, so that the power can be lower than in the past. Become.
　以下、図４～図６において、従来のフラットパドル翼の一例と、本発明のフラットテーパー翼の一例とを比較して説明する。 Hereinafter, in FIG. 4 to FIG. 6, an example of a conventional flat paddle blade and an example of a flat taper blade of the present invention will be described in comparison.
　本発明において適用する消化槽等においては、撹拌槽底部に堆積物が堆積しないように撹拌槽内を撹拌するためには、撹拌槽底部における流速が重要であり、該流速は、低動力で、かつ、撹拌槽底部に堆積物が堆積しない流速が最適な流速（流動化基準速度）となる。そして、かかる流速は、翼の面積に大よそ比例する。 In the digestion tank or the like applied in the present invention, in order to stir the inside of the stirring tank so that deposits do not accumulate at the bottom of the stirring tank, the flow rate at the bottom of the stirring tank is important, the flow rate is low power, In addition, the flow velocity at which deposits do not accumulate at the bottom of the agitation tank is the optimum flow velocity (fluidization reference velocity). Such a flow velocity is approximately proportional to the area of the wing.
　そこで、最適の流速となる翼の面積において、もっとも動力数が小さくなるフラットパドル翼の形状を調べるため、該フラットパドル翼の面積を一定となるように、フラットパドル翼の形状を変化させて、動力特性と流動作用との関係を実験と数値シミュレーションにより求めた。 Therefore, in order to investigate the shape of the flat paddle blade with the smallest power number in the area of the blade with the optimum flow velocity, the shape of the flat paddle blade is changed so that the area of the flat paddle blade is constant, The relationship between power characteristics and flow action was obtained by experiment and numerical simulation.
　その結果、最適な従来のフラットパドル翼の一例を図４に示す。 As a result, an example of an optimal conventional flat paddle blade is shown in FIG.
　該フラットパドル翼は、撹拌槽の直径Ｄが１２ｍ、水面からフラットパドル翼までの距離ｈが１．５ｍ、静翼の翼径が３．４ｍ、翼幅が０．８ｍの場合において、フラットパドル翼の翼径ｄが４．２ｍ、翼幅ｂが１．１ｍとなる。なお、槽底部において、流動化基準速度となる10cm/s以上の速度を得るのに必要な翼の先端周速は、Vyip≧1.05m/sであった。 The flat paddle blade is flat paddle when the stirring tank diameter D is 12 m, the distance h from the water surface to the flat paddle blade is 1.5 m, the stationary blade diameter is 3.4 m, and the blade width is 0.8 m. The blade diameter d of the blade is 4.2 m and the blade width b is 1.1 m. Note that the tip peripheral speed of the blade necessary to obtain a speed of 10 cm / s or more which is the fluidization reference speed at the bottom of the tank was Vyip ≧ 1.05 m / s.
　次に、本発明のフラットテーパー翼の一例を図５に示す。 Next, an example of the flat taper wing of the present invention is shown in FIG.
　該フラットテーパー翼は、撹拌槽の直径Ｄが１２ｍ、水面からフラットパドル翼までの距離ｈが１．１ｍ、静翼の翼径が３．４ｍ、翼幅が０．８ｍの場合において、翼径が４．０ｍ、翼幅ｂ２（内側辺６ｃ）が１．４ｍ、翼幅ｂ１（外側辺６ｂ）が０．６ｍのフラットテーパー翼となる。なお、槽底部において、流動化基準速度となる10cm/s以上の速度を得るのに必要な翼の先端周速は、Vyip≧1.10m/sであった。 The flat tapered blade has a blade diameter when the stirring tank diameter D is 12 m, the distance h from the water surface to the flat paddle blade is 1.1 m, the stationary blade diameter is 3.4 m, and the blade width is 0.8 m. Is a flat tapered blade having a blade width b 2 (inner side 6c) of 1.4 m and a blade width b 1 (outer side 6b) of 0.6 m. It should be noted that the tip peripheral speed of the blade necessary to obtain a speed of 10 cm / s or more as the fluidization reference speed at the bottom of the tank was Vyip ≧ 1.10 m / s.
　また、図６は、扁平型消化槽において、レイノルズ数（Ｒｅ）を変化させた場合、前記従来のフラットパドル翼の動力数（Ｎｐ）と、前記本発明のフラットテーパー翼の動力数とをそれぞれ実験により求めた結果を示す。 Further, FIG. 6 shows the power number (Np) of the conventional flat paddle blade and the power number of the flat taper blade of the present invention when the Reynolds number (Re) is changed in the flat digester. The result calculated | required by experiment is shown.
　この実験結果より、前記従来のフラットパドル翼の翼径（４．２ｍ）に比べて、前記本発明のフラットテーパー翼の翼径（４．０ｍ）の動力数（Ｎｐ）が低いことが判る。 From this experimental result, it is understood that the power number (Np) of the blade diameter (4.0 m) of the flat tapered blade of the present invention is lower than the blade diameter (4.2 m) of the conventional flat paddle blade.
　以上より、前記本発明のフラットテーパー翼は、前記従来のフラットパドル翼に比べて、翼径、翼面積、翼重量が小さいにも関わらず、槽底部における流動化基準速度を同じとなるようにした場合、フラットパドル翼に比べて、上述したように、フラットテーパー翼の方が動力数を小さくすることができると共に、先端周速が上がるものの、翼径が小さくできるので、動力数（Ｎｐ）×回転数（Ｎ）３×翼径（ｄ）５で表されるモータ出力（Ｐ）を下げることができるようになる。
　これにより、フラットテーパー翼は、製品のイニシャルコストと、消費動力のランニングコスト両面で優位であると言える。 As described above, the flat taper blade of the present invention has the same fluidization reference speed at the bottom of the tank, although the blade diameter, blade area, and blade weight are smaller than those of the conventional flat paddle blade. In this case, as described above, the flat taper blade can reduce the power number and the tip peripheral speed can be increased, but the blade diameter can be reduced as compared with the flat paddle blade. Therefore, the power number (Np) The motor output (P) represented by × rotational speed (N) 3 × blade diameter (d) 5 can be reduced.
Accordingly, it can be said that the flat taper blade is superior in both the initial cost of the product and the running cost of the power consumption.
　なお、従来のフラットパドル翼ｅの横径が例えば、９ｍの翼体と比べて、本願発明のフラットテーパー翼の翼体６の横径を６ｍとしても、略同程度の撹拌性能を発揮することができる。 In addition, when the horizontal diameter of the blade body 6 of the flat taper blade of the present invention is 6 m, compared to a blade body having a horizontal diameter of a conventional flat paddle blade e of, for example, 9 m, substantially the same stirring performance is exhibited. Can do.
　また、本願発明では、翼板６の翼径を小さくすることができるので、前記撹拌槽２の開口部３の径を従来に比べて小さく設計することができる。また、開口部３の小さい撹拌槽２も利用できるようになる。また、撹拌槽２の開口部３から、前記回転翼５の取り出しが容易となる。 Further, in the present invention, since the blade diameter of the blade plate 6 can be reduced, the diameter of the opening 3 of the agitation tank 2 can be designed to be smaller than the conventional one. Further, a stirring tank 2 having a small opening 3 can be used. Further, the rotary blade 5 can be easily taken out from the opening 3 of the stirring tank 2.
　なお、図７に示すように、前記モータ７にインバータ装置や可変変速装置などを有する回転制御装置９を別途設け、該回転制御装置９により、前記回転翼５の回転速度を定期的に変化させたり、前記回転翼の回転を正逆回転させたりできるようにする。 As shown in FIG. 7, the motor 7 is provided with a rotation control device 9 having an inverter device, a variable transmission device, and the like, and the rotation control device 9 periodically changes the rotation speed of the rotor blade 5. Or rotating the rotor blades forward and backward.
　具体的には、前記回転制御装置９を用いて、通常時は、消化率に影響を与えない範囲で、槽内底部２ｂにスラリー等の堆積物の堆積が発生する程度の第１の所望の撹拌回転数で、第１の所望の時間だけ、前記回転翼５を回転させる。そして、該第１の所望の時間経過後に、第２の所望の時間だけ前記第１の撹拌回転数より増速した第２の撹拌回転数で前記回転翼５を回転させ、槽内底部２ｂに貯まった堆積物を上昇させるようにすると共に、槽内の均一化を図る。 Specifically, by using the rotation control device 9, the first desired amount is such that deposits such as slurry are generated on the tank bottom 2 b in a range that does not affect the digestibility during normal times. The rotary blade 5 is rotated at a stirring rotational speed for a first desired time. Then, after the first desired time has elapsed, the rotary blade 5 is rotated at a second stirring rotational speed that is higher than the first stirring rotational speed by a second desired time, The accumulated deposits are raised and the tank is made uniform.
　そして、必要に応じて、更に、前記第２の所望の時間経過後に、前記第１の所望の時間だけ、前記通常時における第１の撹拌回転数で前記撹拌翼５を回転させ、そして、該第１の所望の時間経過後に、前記第２の所望の時間だけ、前記第２の所望の撹拌回転数で前記回転翼５を回転させ、槽内底部２ｂに貯まった堆積物を上昇させると共に、槽内の均一化を図り、必要に応じて、これを繰り返す。 Further, if necessary, after the second desired time has elapsed, the stirring blade 5 is rotated at the first stirring rotational speed at the normal time only for the first desired time, and the After the first desired time has elapsed, the rotary blade 5 is rotated at the second desired stirring rotational speed only for the second desired time, and the sediment accumulated in the tank bottom 2b is raised, The inside of the tank is made uniform, and this is repeated as necessary.
　そして、前記通常時の第１の所望の時間における運転時間を長くし、かかる運転時間が長い低速運転と、前記第２の所望の時間における運転時間を短くし、かかる運転時間が短い増速運転とすることにより、平均的な動力を従来以下とすることができるようになる。 Then, the operation time in the first desired time in the normal time is lengthened, the low speed operation in which the operation time is long, and the operation time in the second desired time is shortened, and the speed-up operation in which the operation time is short. As a result, the average power can be reduced below the conventional level.
　なお、設備運用方法によっては、槽内の被処理液を間欠的に引き抜く運用を実施する設備の場合には、槽内の被処理液を引き抜く前に増速運転を実施し、他の期間は、低速で運転するようにしてもよい。 In addition, depending on the equipment operation method, in the case of equipment that carries out operation to withdraw the liquid to be treated in the tank intermittently, a speed-up operation is carried out before drawing the liquid to be treated in the tank, and during other periods You may make it drive at low speed.
　また、前記回転制御装置９により、定期的に前記撹拌翼５を逆転回転させるようにしてもよい。 Further, the rotation control device 9 may periodically rotate the stirring blade 5 in the reverse direction.
　かかる制御により、逆向きの流れを生じさせ、槽内の配管や回転翼等に絡み付いた、し渣と呼ばれる、投入汚泥中の繊維成分を除去できるようになる。 By such control, it becomes possible to remove the fiber component in the input sludge, which is called slag, which causes a reverse flow and is entangled with the piping in the tank and the rotary blades.
　本発明の第２の実施例においては、図８及び図９に示すように、実施例１における回転翼５の各翼板６の基部を、前記回転軸５ａのボス部５ｂに設けた枢支点１０を介して上下方向に（半径方向に伸びる軸回りに）傾動自在に連結すると共に、前記各翼板６の材質を、被処理液の比重よりも小さい比重のものとする。 In the second embodiment of the present invention, as shown in FIG. 8 and FIG. 9, the pivotal support point in which the base portion of each blade 6 of the rotary blade 5 in the first embodiment is provided on the boss portion 5b of the rotary shaft 5a. The blades 6 are connected so as to be tiltable in the vertical direction (around the axis extending in the radial direction) via 10 and the material of each blade 6 is made to have a specific gravity smaller than the specific gravity of the liquid to be treated.
　また、前記翼板６が所望の傾斜角度よりも傾動しないようにする傾動阻止部１１を設ける。 Also, a tilt prevention unit 11 is provided to prevent the blade plate 6 from tilting more than a desired tilt angle.
　本発明の第２の実施例においては、前記回転翼５を被処理液内に挿入していない場合には、該回転翼５は、図９に示すように、重力で各翼体６が下方に垂下し、折り畳み状態となる。 In the second embodiment of the present invention, when the rotor blades 5 are not inserted into the liquid to be treated, the rotor blades 5 are moved downward by gravity as shown in FIG. It hangs down and becomes a folded state.
　そして、該折り畳まれた前記回転翼５を、前記撹拌槽２内の被処理液内に挿入すれば、図８に示すように、前記各翼体６は、浮力により、前記翼体６が上方に傾動する。 Then, when the folded rotary blade 5 is inserted into the liquid to be treated in the stirring tank 2, as shown in FIG. 8, the blade bodies 6 are moved upward by buoyancy. Tilt to.
　そして、前記回転翼５を回転させる際の前記各翼体６の所望の傾斜角度まで傾動した時、例えば、前記翼体が水平に開いた時に、前記翼体６の上端が前記傾動阻止部１１に当接して、その傾動が阻止され、前記各翼体６の回転使用時における所望の傾斜角度で、前記各翼体６を開いた状態とすることができる。 Then, when the blades 6 are tilted to a desired inclination angle when the rotary blades 5 are rotated, for example, when the blades are opened horizontally, the upper ends of the blades 6 are moved to the tilt prevention unit 11. And the tilting of the blades 6 is prevented, and the blades 6 can be opened at a desired tilt angle when the blades 6 are rotated.
　なお、前記翼体６が、浮上する際、反対方向に傾動（回動）してしまうのを防ぐために、必要に応じて、前記翼板６の回転方向を規制する規制手段（図示せず）を設けても良い。　 In order to prevent the blade body 6 from tilting (turning) in the opposite direction when it floats, a restricting means (not shown) for restricting the rotational direction of the blade plate 6 as necessary. May be provided. *
　以上の状態で、前記回転翼５を回転させることにより、前記撹拌槽２内を撹拌できるようになる。 In this state, the inside of the stirring tank 2 can be stirred by rotating the rotary blade 5.
　本発明の第２の実施例によれば、回転使用時における回転翼５の翼径が、前記撹拌槽２の開口部３の開口径よりも大きい場合であっても、回転翼５を折り畳むことにより、該回転翼５を槽内に挿入することができるようになる。 According to the second embodiment of the present invention, the rotating blade 5 is folded even when the blade diameter of the rotating blade 5 during rotation is larger than the opening diameter of the opening 3 of the stirring tank 2. Thus, the rotor blade 5 can be inserted into the tank.
　また、比重差を用いた浮力を利用して、前記回転翼５を使用できる状態に拡張するので、複雑な機構を要しない。 Moreover, since the rotary blade 5 is extended to a usable state by using buoyancy using the specific gravity difference, a complicated mechanism is not required.
　なお、前記翼板６の比重を被処理液の比重よりも小さくする代わりに、前記回転翼５を回転させることにより、その遠心力により、該翼板６が所望の傾斜角度で開くようにしてもよい。 Instead of making the specific gravity of the blade plate 6 smaller than the specific gravity of the liquid to be treated, by rotating the rotary blade 5, the blade plate 6 is opened at a desired inclination angle by the centrifugal force. Also good.
　また、前記回転翼５の回転による遠心力で前記翼板６を開きやすくするために、該各翼板６に重り（図示せず）を設けるようにしてもよい。 Also, a weight (not shown) may be provided on each blade 6 so that the blade 6 can be easily opened by the centrifugal force generated by the rotation of the rotary blade 5.
　なお、かかる実施例２においては、従来のフラットパドル翼に適用することもできる。 It should be noted that the second embodiment can be applied to a conventional flat paddle blade.
１　　　撹拌装置
２　　　撹拌槽
２ａ　　天井部
２ｂ　　底部
３　　　開口部
４　　　蓋部
５　　　回転翼
５ａ　　回転軸
５ｂ　　ボス部
６　　　翼板
６ａ　　上側辺
６ｂ　　外側辺
６ｃ　　内側辺
６ｄ　　下側辺
７　　　モータ
８　　　静翼
９　　　回転制御装置
１０　　枢支点
１１　　傾動阻止部 DESCRIPTION OF SYMBOLS 1 Stirring apparatus 2 Stirring tank 2a Ceiling part 2b Bottom part 3 Opening part 4 Cover part 5 Rotor blade 5a Rotating shaft 5b Boss part 6 Blade 6a Upper side 6b Outer side 6c Inner side 6d Lower side 7 Motor 8 Stator blade 9 Rotation control Device 10 Pivoting point 11 Tilt prevention part

Claims (9)

  1. 　撹拌槽と、該撹拌槽内に設けた回転翼と、該撹拌槽の底部に設けた放射状に延びる静翼とよりなり、
    　前記回転翼は、１又は複数のフラットテーパー翼からなることを特徴とする攪拌装置。     A stirring vessel, a rotating blade provided in the stirring vessel, and a radially extending stationary blade provided at the bottom of the stirring vessel;
    The rotary blade is composed of one or a plurality of flat taper blades.
  2. 　前記フラットテーパー翼は、その外形形状が、前記撹拌翼の回転軸から外方に向かって徐々に面積が小さくなる形状であることを特徴とする請求項１に記載の撹拌装置。 The stirrer according to claim 1, wherein the outer shape of the flat taper blade is such that the area gradually decreases outward from the rotating shaft of the stirring blade.
  3. 　前記フラットテーパー翼は、該フラットテーパー翼の外形形状が、水平方向に延びる上側辺と、垂直方向に延びる外側辺と、垂直方向に延びる内側辺と、外方に向かって直線状に斜め上方に延びる下側辺とよりなることを特徴とする請求項２に記載の撹拌装置。 The flat taper wing has an outer shape in which the outer shape of the flat taper wing is obliquely upward in a straight line toward the outside, an upper side extending in the horizontal direction, an outer side extending in the vertical direction, an inner side extending in the vertical direction. The stirring device according to claim 2, comprising a lower side extending.
  4. 　前記回転翼の回転を制御する回転制御装置を更に有することを特徴とする請求項１、２または３に記載の撹拌装置。 4. The stirring device according to claim 1, further comprising a rotation control device for controlling rotation of the rotary blade.
  5. 　前記回転制御装置は、前記回転翼の回転速度を変化させる制御装置であることを特徴とする請求項４に記載の撹拌装置。 The stirring device according to claim 4, wherein the rotation control device is a control device that changes a rotation speed of the rotary blade.
  6. 　前記回転制御装置は、前記回転翼の回転を正逆回転させる制御装置であることを特徴とする請求項４に記載の撹拌装置。 The stirring device according to claim 4, wherein the rotation control device is a control device for rotating the rotating blades forward and backward.
  7. 　前記回転翼の回転軸に対して、前記フラットテーパー翼を傾動自在に設けることを特徴とする請求項１乃至請求項６のいずれか１に記載の撹拌装置。 The stirrer according to any one of claims 1 to 6, wherein the flat taper blade is tiltably provided with respect to a rotation axis of the rotary blade.
  8. 　前記フラットテーパー翼の比重は、前記撹拌槽内に容れられる被処理液の比重よりも、小さいことを特徴とする請求項７に記載の撹拌装置。 The stirring device according to claim 7, wherein the specific gravity of the flat taper blade is smaller than the specific gravity of the liquid to be treated contained in the stirring tank.
  9. 　撹拌槽と、該撹拌槽内に設けた、１又は複数のフラットテーパー翼からなる回転翼と、該撹拌槽の底部に設けた放射状に延びる静翼と、前記回転翼の回転を制御する回転制御装置とよりなる攪拌装置の前記回転制御装置により、
    　上記撹拌槽内底部にスラリー等の堆積物の堆積が発生する程度の第１の所望の撹拌回転数で、第１の所望の時間だけ、前記回転翼を回転させる第一の工程と、
    　第２の所望の時間だけ前記第１の撹拌回転数より増速した、槽内底部に貯まった前記堆積物を上昇させる第２の撹拌回転数で前記回転翼を回転させる第二の工程と、
    　必要に応じて、上記第一の工程と上記第二の工程を繰り返す第三の工程とよりなる撹拌方法。
     

          Rotation control for controlling the rotation of the agitation tank, a rotary blade comprising one or a plurality of flat taper blades provided in the agitation tank, a radially extending stationary blade provided at the bottom of the agitation tank, and the rotation blade By the rotation control device of the stirring device comprising the device,
    A first step of rotating the rotor blades for a first desired time at a first desired agitation speed at which deposits of slurry and the like are generated at the bottom of the agitation tank; and
    A second step of rotating the rotor blade at a second agitation speed that raises the deposit accumulated at the bottom of the tank, which is increased by a second desired time from the first agitation speed,
    A stirring method comprising the first step and a third step in which the second step is repeated as necessary.


PCT/JP2016/060501 2015-07-10 2016-03-30 Stirring apparatus and stirring method WO2017010131A1 (en)

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JPS63315196A (en) * 1987-06-16 1988-12-22 Kajima Corp Anaerobic bioreactor
JPH05192697A (en) * 1992-01-21 1993-08-03 Toshiba Corp Sludge digestion controller
JPH0760093A (en) * 1993-08-31 1995-03-07 Satake Kagaku Kikai Kogyo Kk Stirring device
JP2000015075A (en) * 1998-07-03 2000-01-18 Satake Chemical Equipment Mfg Ltd Agitation blade and its agitator
JP2007061693A (en) * 2005-08-30 2007-03-15 Kazunori Denki Kogyo Kk Stirrer for paint container
JP2011016087A (en) * 2009-07-09 2011-01-27 Kobelco Eco-Solutions Co Ltd Agitating vessel and agitator equipped with the same
JP2013248565A (en) * 2012-05-31 2013-12-12 Swing Corp Sludge flocculation device, and method for conditioning sludge
JP2015062461A (en) * 2013-09-24 2015-04-09 義弘 益田 Whisk container

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63315196A (en) * 1987-06-16 1988-12-22 Kajima Corp Anaerobic bioreactor
JPH05192697A (en) * 1992-01-21 1993-08-03 Toshiba Corp Sludge digestion controller
JPH0760093A (en) * 1993-08-31 1995-03-07 Satake Kagaku Kikai Kogyo Kk Stirring device
JP2000015075A (en) * 1998-07-03 2000-01-18 Satake Chemical Equipment Mfg Ltd Agitation blade and its agitator
JP2007061693A (en) * 2005-08-30 2007-03-15 Kazunori Denki Kogyo Kk Stirrer for paint container
JP2011016087A (en) * 2009-07-09 2011-01-27 Kobelco Eco-Solutions Co Ltd Agitating vessel and agitator equipped with the same
JP2013248565A (en) * 2012-05-31 2013-12-12 Swing Corp Sludge flocculation device, and method for conditioning sludge
JP2015062461A (en) * 2013-09-24 2015-04-09 義弘 益田 Whisk container

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