JPS6115794A - Aeration apparatus - Google Patents

Abstract

PURPOSE:To contrive to enhance air diffusion effect, by constituting air-outflow possible gaps in the peripheral parts of upper and lower main bodies constituting an air chamber and winding said peripheral part by a synthetic rubber ring. CONSTITUTION:The titled apparatus is constituted of a cup shaped upper main body 13, a lower main body 11 formed into a cup shape and having an air feed port 11f at the almost central part thereof and a ring 14 made of synthetic rubber, and peripheral parts 13c, 11d having air-outflow possible gaps formed thereto are respectively provided to the outer peripheries of the upper main body 13 and the lower main body 11. The upper main body 13 and the lower main body 11 are connected at the position where the peripheral parts 13c, 11d are opposed to each other to form an air chamber 12 therein and the ring 14 is wound around the both peripheral parts and air is sent into the air chamber 12 from the air feed port 11f to be diffused from the gaps of both peripheral parts against the elasticity of the ring 14. As a result, an air diffusion degree is enhanced to enhance the purification effect of sewage and the assembling of the members for constituting an aeration apparatus becomes easy and the generation of the stress of the members is reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an aeration device used for sewage treatment and the like.

(Prior Art) Aeration purification is performed as a purification treatment for wastewater such as sewage and wastewater. In other words, by blowing air from an aeration device installed in the aeration tank into the sewage stored in the aeration tank where activated sludge is mixed, the organic matter in the sewage that has adhered or adsorbed to the activated sludge is oxidized. Wastewater is purified by being absorbed into activated sludge.

In this type of aeration purification, air is diffused widely and finely in the aeration tank to make it come into contact with wastewater.
The ability to dissolve oxygen in the air is a factor that determines the efficiency of wastewater treatment.

This type of aeration device has been devised extensively in the past. For example, as shown in FIG. 4, the shaft 20 has a hollow shaft 21 halfway up from the bottom, and has an opening 20 at the top end.
It is a trumpet-shaped main body made of synthetic resin and has a shaft 21.
A stepped washer 22 that holds a rubber disk (described later) is installed on the top of the
A groove 21a is formed into which a stopper 25 for holding the stepped washer 22 is inserted. 24 is a rubber disk having a hole 24a in the center, and the stepped washer 22
The air chamber 25 is disposed on the upper part of the shaft 21 via the air chamber 25 . By the way, the rubber disk 24 is a flat disk before being installed, but its central portion is moved in the direction of arrow A using the stepped washer 22 so that its peripheral edge 24b is pressed into contact with the opening 20a of the main body 20. Because it is placed under pressure, it is deformed into a shallow cup shape when placed. This device supplies air to the air chamber 25 in the direction of arrow B through the vent hole 21b at the bottom of the shaft 21, and diffuses the pressure air from the pressure contact between the peripheral edge 24b of the rubber disk and the opening 20a of the main body. Sewage is being treated. The rubber disk 24 used in this device is made of a thick plate with a rubber thickness of about 6t1m in order to maintain durability in dirty water and maintain the elastic force that presses the peripheral edge against the main body for a long period of time. There is.

(Problems with the prior art) As mentioned above, in order to improve the efficiency of sewage treatment, it is necessary to diffuse air finely into the sewage water. Pressure force with the opening of the main body, i.e.
The force in the direction of arrow A that presses the central portion of the rubber disk in the axial direction has a large effect on the air diffusion situation. Therefore, the dimensional accuracy of processing the groove 21m on the upper part of the shaft 21 that holds the center part of the rubber disk is increased, and the stepped washer 22,
The stopper 23 and the like must also be made of parts with high processing precision. Furthermore, as for the rubber disk 24, sludge is deposited on its upper surface, and as mentioned above, it is constantly pressed and deformed, so even if thick synthetic rubber material is used, it may become distorted over time. Partial deformation occurs, and therefore, air is diffused unevenly from the periphery, and the effect of oxygen in the air diffusion to oxidize organic matter in wastewater is reduced, resulting in a reduction in wastewater treatment efficiency.

(Objective of the Invention) The object of the present invention is to solve the above-mentioned conventional drawbacks, and to not only achieve a high degree of aeration, but also to simplify the assembly of the members constituting the aeration device, and to reduce the occurrence of distortion of the members. Another object of the present invention is to provide an aeration device in which distortion and deformation have little effect on the generation of aeration.

(Summary of the Invention) Honyoro has a cup-shaped upper main body, a cup-shaped lower main body having an air inlet in the approximate center, and a ring made of synthetic rubber, and has an upper main body and a lower main body. Each outer periphery is provided with a peripheral part with a gap through which air can flow out, and an air chamber is formed inside the upper main body and the lower main body by joining the upper main body and the lower main body at positions where the respective peripheral parts of the upper main body and the lower main body face each other. At the same time, by wrapping a ring around the inner periphery and introducing air into the air chamber from the air inlet, air is diffused from the gap in the side periphery against the elasticity of the ring. It is related to the device.

(Example) Next, embodiments of the present invention will be described in detail using the drawings.

1 to 3 show an embodiment of the aeration device according to the present invention. In FIG. 1, 1 is a down pipe (riser pipe), one end of which is connected to a blower, although not shown;
1 is a collecting pipe (header pipe) connected to the down pipe 1, 3 is a branch pipe connected to the collecting pipe 2, and 10 is a branch pipe 3
This is an aeration system installed in an aeration tank usually containing activated sludge.

FIG. 2 is a cutaway perspective view of the main body of the aeration device 10, and 11 is a cup-shaped lower main body having a central axis 11a, which is a molded product of synthetic resin. The central axis 11a is the branch pipe 3
In order to receive pressurized air, a screw 11b is provided at the lower end, and its axis is hollow to form an air supply port 11 (
It is configured to introduce pressurized air into the upper air chamber 12. A peripheral part 11d is provided at the upper part of the outer periphery of the lower main body 11, and the peripheral part 11d is formed so that the upper surface thereof has a continuous wave-like unevenness. A peripheral protrusion 11e is provided to protrude throughout. Reference numeral 11e denotes a support portion, which is formed from the central upper part of the lower main body 11 toward the outer circumference, and a recessed portion for supporting a main shaft portion 13a of the upper main body 13, which will be described later, is provided in the center thereof.

Next, reference numeral 15 is an inverted cup-shaped upper main body molded from synthetic resin, and a peripheral part 13c is formed at the lower part of the outer periphery so that the lower surface thereof becomes continuous wavy unevenness. 11d, and a peripheral protrusion 13d protrudes from the entire circumference of the joint between the peripheral portion 13c and the inverted cup-shaped outer surface. Further, the main shaft portion 13a is formed in a cylindrical shape as the central axis of the upper main body 15, and when placed on the lower main body 11, the lower part of the main shaft portion 13a is supported by a recess in the center of the support portion 11 (of the lower main body 11). The main shaft portion 13. and the support portion 11 are further screwed from below the center of the support portion 11c.
c will be fixed. Next, a cylindrical portion 13b that is concentric with the peripheral portion 13c around the entire circumference is formed in the middle between the main shaft portion 15a and the peripheral portion 13c so as to open downward. Therefore, the lower surface of the cylindrical portion 13b is supported by the upper surface of the outer peripheral portion of the support portion 11C, and the main shaft portion 13a
At the same time, the upper main body 13 is stably held above the lower main body 11, and at the same time, the air chamber 12 formed by the upper and lower main bodies is kept pupil-protected against the water pressure in the dirty water.

Next, FIG. 3 is a partially cutaway perspective view of an annular ring 14 made of synthetic rubber. Then, it is wound between the peripheral edge 13d and the peripheral edge 11e. As shown in the figure, the longitudinal section of the ring 14 has an arcuate outer surface and a protrusion 14a formed at the center of the inner surface. During the winding described above, the protrusion 14a is held between the convex portions of the upper and lower peripheral portions 13c and 11d, and a gap is formed between the concave portions and the convex portions of the upper and lower peripheral portions. The protrusion of 13d and 11e prevents the ring 14 from coming off from the inner peripheral portions 13c and 11d.

Next, the upper main body 13, the lower main body 11, and
To assemble the ring 14, first, the lower inner surface of the ring 14 is wrapped around the peripheral portion 11d of the lower main body 11. Next, while wrapping the upper side of the inner surface of the ring 14 around the peripheral portion 13c of the upper main body 15, wrap the upper main body so that the lower part of the main shaft portion 15a of the upper main body 13 fits into the recessed portion at the center of the support portion 11c. 13 is placed on the upper part of the lower main body 11, and the supporting part 11
If the main shaft part 15a is fixed with the downward screw at the center of c,
The lower surface of the cylindrical portion 13b abuts the outer peripheral portion of the upper surface of the support portion 11c, and the upper main body 13 is integrally coupled with the lower main body 11. Therefore, after assembly, the ring 14 is attached to the upper main body 13.
The lower main body 11 is supported between the protrusions of the peripheral protrusion 13d and the circumferential protrusion 11e by accumulating the unevenness of the inner peripheral parts 13c and 11d, so the three points of the upper main body 13, the lower main body 11, and the ring 14 are supported. An air chamber 12 is formed inside.

To explain the operation of this embodiment with such a configuration, the pressurized air from the blower via the down pipe 1, the collecting pipe 2, and the branch pipe 3 passes through the air supply port 11f of the central axis 11a of the lower main body 11. The air is introduced into the air chamber 12. Next, the pressure air filling the air chamber 12 is applied to the ring 1 from the outer circumferential direction of the upper and lower peripheral areas.
4 and against the water pressure of the sewage in the aeration tank, the sewage flows through the gaps in the recesses of the inner peripheral parts 13c and 11d, passes through the pressure contact with the ring 14, and becomes countless fine bubbles, causing the sewage to flow out. It is diffused inside. Therefore, this diffused air is ejected from the upper and lower parts of the entire circumference of the ring 14, and according to experiments, the solubility of oxygen in water in the diffused air is improved by about 20% compared to the above-mentioned conventional example. There is.

Although the present invention has been described with reference to the above-mentioned embodiment, within the scope of the present invention, for example, the peripheral portions of the upper and lower main bodies may be formed in a straight line rather than a wavy shape, or in a sawtooth shape, or The peripheral portions may be brought close together and a small hole may be drilled near the contact portion to form a gap, or the inner surface of the ring may be flat without protrusions, or the circumferential protrusions 11e and 13d may not be formed. Various modifications such as these are possible, and these are not excluded from the scope of the present invention.

Further, in the above embodiment, the upper main body 13 and the lower main body 1
When the ring 14 is wound around the outer circumference of the ring 1, if the upper part of the ring 14 is configured so as not to come into contact with the peripheral protrusion L5d, the air will be diffused through the gap in the concave part of the peripheral part 13c and through the pressure contact part with the ring 14. Since the air bubbles collide with the peripheral protrusion 13d, the air bubbles become finer and the degree of air diffusion is improved.

(Effects of the Invention) As described above in detail, the present invention includes a gap through which air can flow out in the peripheral areas of the upper main body and the lower main body constituting the air chamber, and the peripheral area is surrounded by a synthetic rubber ring. Because it is wrapped, the pressure through the voids becomes fine bubbles and diffuses into the wastewater from the entire circumference of the ring, which improves the solubility of the oxygen in the bubbles in the wastewater, increasing the wastewater purification effect. .

Next, in the present invention, the pressing force of the ring against the upper and lower side peripheral parts has little influence on the degree of aeration, and it has a simple structure that applies strong load and pressure to the members related to aeration.
Processing of each part! # There is no need to increase the degree of friction, and because of the ring structure, distortion of the synthetic rubber ring is less likely to occur. Note that even if the ring is distorted or deformed over time, it will have a small effect on aeration because it is in a ring shape and is dispersed over the entire circumference.

In addition, since synthetic rubber is ring-shaped, the amount used is small.
Therefore, manufacturing costs are low.

Furthermore, the exterior and interior of this embodiment are vertically symmetrical, and the air gaps and rings that emit diffused air are vertically symmetrical, so the entire device can be installed upside down in wastewater. However, it has almost no effect on aeration and can be installed over a wide range of areas.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing the installed state of the aeration device according to the present invention, Fig. 2 is a broken perspective view of the upper and lower main bodies of an embodiment of the aeration device according to the present invention, and Fig. 3 is a perspective view of the ring. FIG. 4 is a partially cutaway perspective view of an example of a conventional aeration device. 10... Aeration system M 11... Lower main body 11c
...Supporting part 11d...Peripheral part 11e...
・Peripheral protrusion 11f...Air supply port 12...Air chamber 13...Upper main body 13c...Periphery
13d... Peripheral protrusion 14... Ring

Claims (1)

[Claims] It has a cup-shaped upper main body, a cup-shaped lower main body with an air inlet in the center, and a ring made of synthetic rubber, and the outer periphery of each of the upper main body and the lower main body allows air to flow out. By providing a peripheral portion with a void formed therein, and joining the upper main body and the lower main body at positions where the respective peripheral portions of the upper main body and the lower main body face each other, an air chamber is formed therein, and an air chamber is formed inside the peripheral portion, and An aeration device that diffuses air from the gaps around both sides against the elasticity of the ring by wrapping it around a ring and sending air into the air chamber from the air inlet.