JP2005305257A - Aeration equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an aerator which effectively and continuously brings water in contact with the atmosphere with a small energy consumption to improve the solubility of oxygen in air. <P>SOLUTION: The aerator comprises an aerator body B made by attaching at least one agitating blade 3 to an agitating shaft 2 rotated by an electric motor 1, and an aeration device A attached to the bottom of the aerator body B, and having a cylinder 5 enclosing the outer periphery of the agitating blade 3 at a central part, and an upper surface 7 formed in a shape of a staircase where the external diameters of lower discs 72, 73 are larger than the external diameter of the upper disc 71. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an aeration apparatus, and more particularly to an aeration apparatus that effectively makes contact between water and the atmosphere with less energy consumption and improves the dissolution rate of oxygen in the air.

  Conventionally, in the case of aerobic treatment of sewage, a water surface agitating aeration apparatus that is forced to aeration with a stirring blade rotating the sewage surface and aerated, and sewage, although not particularly limited, A diffuser tube type aeration apparatus or the like has been proposed in which air bubbles are discharged from a diffuser tube disposed at the bottom position of sewage for aeration.

By the way, a water surface agitating type aeration apparatus forcibly rotates an agitating blade disposed at a sewage water surface position with an electric motor, agitates the surface portion of the sewage by the rotation of the agitating blade, and air is supplied during this agitation. Along with miniaturization, the air bubbles are stirred so as to be mixed into the sewage water, so that oxygen in the air is dissolved in the water. The dissolution of oxygen is the size, shape and rotation speed of the stirring blades. Is almost proportional to
In addition, the air diffuser type aeration device is designed to send high-pressure air to the air diffuser arranged at the bottom of the tank so as to be discharged as bubbles from the air diffuser into the sewage. The oxygen in the bubbles is dissolved in water, and the oxygen dissolution is enhanced according to the amount of air blown out.

For this reason, this water agitating aeration apparatus requires a large amount of power to rotate the agitating blade for aeration, and only the water surface portion can be agitated and aerated, so there is a limit to the dissolution of oxygen, and the energy efficiency of aeration is reduced. There is a problem that there is a limit to increasing the oxygen transfer rate per unit power of the power to be increased.
In addition, in the diffuser type aeration apparatus, if the tank in which the diffuser pipe is disposed becomes deeper, it is necessary to increase the pressure supplied to the tank. Furthermore, the diffuser pipe is often clogged. There was a problem that it took time to clean.

  In view of the problems of the above-described conventional aeration apparatus, the present invention effectively and continuously makes contact between water and the atmosphere with less energy consumption so as to improve the dissolution rate of oxygen in the air. An object of the present invention is to provide an aeration apparatus.

  In order to achieve the above object, an aeration apparatus according to the present invention includes an aerator main body in which at least one agitating blade is attached to an agitator shaft that is rotated by an electric motor, and an outer periphery of the agitating blade that is attached to a lower portion of the aerator main body. A cylindrical portion formed in a central portion, and an aerating device having an upper surface having a stepped shape in which the outer diameter of the lower disk is sequentially larger than the outer diameter of the upper disk. It is characterized by that.

  In this case, the aeration apparatus can be configured in a float shape in which a plurality of discs having different diameters are integrally disposed on the outer periphery of the cylindrical body and the inside is airtight.

  Further, in this case, the aeration apparatus can be configured by hanging and supporting a plurality of discs having different diameters with a hanging rod.

  In this case, a plurality of discs having different diameters can be inclined surfaces with lower outer peripheral edges.

  According to the aeration apparatus of the present invention, an aerator main body in which at least one agitating blade is attached to an agitator shaft that is rotated by an electric motor, and a lower part of the aerator main body, and the outer periphery of the agitating blade is enclosed. The upper surface is formed of a stepped aeration device in which the outer diameter of the lower-stage disk is sequentially larger than the outer diameter of the upper-stage disk. Since the water overflows from the upper end of the cylinder that covers the periphery of the cylinder, only a small amount of energy is applied. Collision with the plate, part of which becomes water droplets, and the contact with the atmosphere promotes the dissolution of oxygen in water, and the sewage is stirred in the entire tank at the flow rate of sewage flowing down along the upper surface of the aeration device. It can be.

  In addition, the aeration apparatus can be floated on the surface of the water by arranging a plurality of discs with different diameters integrally on the outer periphery of the cylindrical body and forming an airtight float inside. Since the aeration apparatus also rises and falls following the change in the water level, the aeration and stirring of the sewage can be performed efficiently regardless of the change in the water level.

  In addition, by configuring the aeration device by hanging and supporting a plurality of discs with different diameters by the hanging rod, the number of hanging plates can be easily changed. Since the aeration apparatus can be lifted out of the tank simply by pulling up, maintenance can be easily performed.

  In addition, by using a plurality of discs with different diameters as inclined surfaces with lower outer peripheral edges, the water flowing out of the cylinder can be reliably transferred from the inner periphery to the outer periphery of the stepped and inclined disc The sewage can be effectively stirred.

  Hereinafter, embodiments of the aeration apparatus of the present invention will be described with reference to the drawings.

FIG. 1 shows a first embodiment of the aeration apparatus of the present invention.
The aeration apparatus includes an aerator main body B configured by attaching at least one agitating blade 3 to an agitating shaft 2 that is rotated by an electric motor 1, and a lower portion of the aerator main body B, and an outer periphery of the agitating blade 3 The cylinder 5 formed so as to surround is composed of an aeration apparatus A formed in the center.
The stirring shaft 2 inserted into the cylinder is installed so as to be vertical or substantially vertical.

The aerator main body B is not particularly limited. For example, as shown in FIG. 1, a stirring shaft 2 having a required length is attached to the motor shaft of the motor 1 having a required capacity. At least one, or as shown in the figure, one stirring blade 3 and a flow straightening blade 4 for flow straightening are attached.
The one agitating blade 3 is not particularly limited. For example, the one agitating blade 3 is of a screw type and has a function of agitating water by rotation and pushing up the inside of the cylinder upward. 4 is a disk-shaped disk whose lower surface has an inverted conical shape so that the water pushed up by the stirring blade 3 at the lower position is expanded and ejected in the outer peripheral direction (radial direction) of the aerator body B. The outer diameter is set to be larger than 3.

Further, the aeration apparatus A disposed in the lower position of the aerator main body B is not particularly limited. For example, as shown in FIG. 1, as shown in FIG. 1, an airtight float type including a cylinder 5 having a straight inner diameter. In this cylinder 5, the stirring blade 3 of the aerator body B is inserted so that the outer periphery of the stirring blade 3 is covered with the cylinder 5, and the float type The buoyancy acting on the aeration apparatus A is set so as to support the weight of the aeration apparatus A and the aerator body B and float on the water surface, and the shape of the bottom surface is not particularly limited. The bottom 6 is made flat so that it can easily float on the water surface, and the upper surface 7 is made stepwise.
The upper surface 7 has a plurality of different diameters, and is not particularly limited. For example, three disks 71, 72, 73 are arranged at predetermined intervals in the vertical direction. In this case, the outer diameter of the lower disk is made larger than the outer diameter of the upper disk.
It should be noted that, if necessary, each step of the circular plate can be an inclined surface with a lower outer peripheral edge.

The float-type aeration apparatus A and the aerator main body B which are airtight inside are connected and fixed to each other by a plurality of connecting rods 75 and 75.
In this case, the agitating and agitating water between the aeration apparatus A and the aerator main body B is radially directed to the outer periphery of the aerator main body B between the motor mounting plate 11 of the aerator main body B and the uppermost disk 71 of the aeration apparatus A. The rectifying blades 4 are connected between the aeration apparatus A and the aerator main body B so as to be scattered.

Next, the operation of the present invention will be described.
The aeration machine main body B is arranged on the aeration apparatus A and integrated with the connecting rods 75 and 75, and the agitating blade 3 is attached so as to be rotatably inserted into the cylinder 5 to assemble the aeration apparatus.
When the aeration apparatus is floated on the sewage water surface of an aeration tank or the like by the action of the float type aeration apparatus A and the electric motor 1 is driven, the agitating blade 3 and the rectifying blade 4 are simultaneously rotated by the electric motor 1. By the rotation of the stirring blade 3, the sewage around the stirring blade 3 is stirred, and the sewage in the cylinder 5 generates a rising water flow by the rotation of the stirring blade 3, whereby the sewage in the lower water area of the cylinder is sequentially moved into the cylinder. To suck up.

The sewage that has risen in the cylinder 5 collides with the inverted conical surface of the lower surface of the rectifying blade 4 disposed in the upper part of the cylinder, and then is converted from the ascending direction to the horizontal direction, between the aeration apparatus A and the aerator body B. It is emitted in the radial direction from the gap.
Even if the discharge power of the sewage discharged from the gap is weak and there is no large energy to scatter the sewage from the upper end, the stepped upper surface 7 of the aeration apparatus A, that is, a plurality of discs 71 having different diameters. , 72 and 73 are caused to fall down from the upper disk 71 to the lower disks 72 and 73 in order by gravity of the sewage, and collide with each stage of the sewage. Some of the water droplets come into contact with the atmosphere, and oxygen dissolves in the wastewater.
Thus, when the sewage flows down the stepped upper surface 7 of the aeration apparatus A and collides with the water surface 8 of the sewage, a part of the sewage becomes water droplets and aeration is performed efficiently.
In addition, the sewage that has flowed down to the surface of the sewage can beat the water surface by its downflow force, dissolve oxygen, and generate a circulating water flow in the sewage to stir the entire tank.

FIG. 2 shows a second embodiment of the aeration apparatus of the present invention.
In this aeration apparatus, instead of the float type aeration apparatus A of the first embodiment, the aeration apparatus is suspended and supported at a predetermined position in the aeration tank from a fixed object 10 such as a beam using a suspension rod 9. It is a thing.
In this aeration apparatus A, a plurality of discs 71, 72, 73 having different diameters and increasing in diameter from the upper side are formed on the outer peripheral portion of the cylinder 5 that surrounds the outer periphery of the stirring blade 3. In addition to being arranged in a staircase shape, each stage disk and cylinder are fixed, and each stage disk is connected and fixed by a connecting tool 74.
The operation of the second embodiment is the same as that of the first embodiment.

  As described above, the aeration apparatus of the present invention has been described based on a plurality of examples.However, the present invention is not limited to the configurations described in the above examples, and the configurations described in the examples are appropriately combined. The configuration can be changed as appropriate without departing from the spirit of the invention.

  The aeration apparatus of the present invention has the characteristics of effectively and continuously contacting water and the atmosphere with low energy consumption and improving the dissolution rate of oxygen in the air. In addition to being suitable for use in processing aeration, for example, it can also be used in processing such as settlement drainage and processing requiring aeration.

The 1st Example of the aeration apparatus of this invention is shown, (A) is sectional drawing, (B) is a top view. The 2nd Example of the aeration apparatus of this invention is shown, (A) is sectional drawing, (B) is a top view.

Explanation of symbols

A aeration apparatus B aeration machine body 1 electric motor 2 stirring shaft 3 stirring blade 4 rectifying blade 5 cylinder 6 bottom 7 upper surface 71 disk 72 disk 73 disk 74 connecting tool 75 connecting rod 8 water surface 9 suspended rod 10 fixed object

Claims (4)

  An aerator main body having at least one agitating blade attached to an agitator shaft rotated by an electric motor, and a cylinder attached to the lower portion of the aerator main body and surrounding the outer periphery of the agitating blade are formed in the center portion. An aeration apparatus comprising an aeration apparatus having a stepped upper surface in which the outer diameter of the lower disk is larger than the outer diameter of the upper disk.   2. The aeration apparatus according to claim 1, wherein the aeration apparatus is configured in a float shape in which a plurality of discs having different diameters are integrally disposed on an outer periphery of a cylindrical body and the inside is airtight.   The aeration apparatus according to claim 1, wherein the aeration apparatus is configured by hanging and supporting a plurality of discs having different diameters by a hanging rod.   The aeration apparatus according to claim 1, 2, or 3, wherein a plurality of discs having different diameters are inclined surfaces having lower outer peripheral edge portions.

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