JP2001246394A - Elevation device of diffuser body in aeration tank - Google Patents

Abstract

PROBLEM TO BE SOLVED: To allow a diffuser in an aeration tank freely rotatable, to allow the same easily and freely extractable outside via a longitudinal guide member and a small-sized opening and to minimize the leakage of odor. SOLUTION: This elevation device of differ body in an aeration tank is constituted in such a manner that a guide 20 is freely elevatably engaged with a longitudinal guide member 24, the diffuser 10 is freely rotatably connected with the guide 20 via a hinge 21, the diffusing body is allowed to rotate and elevate in a parallel state to the longitudinal guide member 24 and, thereby, the taking in and out of the diffuser 10 through the opening which is more small-sized than heretofore is made possible.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for raising and lowering gas diffusion in an aeration tank. Accordingly, the present invention relates to a novel improvement for making it possible to reduce the size of an opening formed in an aeration tank by a full aeration system.

[0002]

2. Description of the Related Art In general, in aerobic treatment for biologically treating pollutants with aerobic microorganisms, a diffuser installed in an aerobic treatment tank is vertically moved downward from an air supply source such as a blower. Air is supplied to the diffuser through the laid air supply pipe, and air bubbles are blown into the aerobic treatment tank through a number of small air ejection holes drilled in the diffuser to perform aeration. I was

[0003] In such a sewage treatment apparatus, the air ejection holes may be clogged by sludge or the like, and the air diffuser may not function properly. In such a case, maintenance for regularly cleaning the air ejection holes of the air diffuser with a brush or the like is performed. However, in order to do so, the air diffuser must be lifted out of the aerobic treatment tank, the air ejection holes must be cleaned, and then the air diffuser must be installed in the aerobic treatment tank again. There was a problem that it was extremely difficult.

Recently, in order to increase the efficiency of aeration,
A contact material to which aerobic microorganisms are attached is installed in an aerobic treatment tank, and a full-aeration type sewage treatment device in which a diffuser is installed below the contact material is used. In such a full-aeration type sewage treatment apparatus, since the diffuser is disposed directly below the contact material, mounting and removing the diffuser is more difficult. Had to be reduced in volume.

In particular, recently, instead of these air diffusers, as shown in FIGS. 9 and 10, a large number of fine pores are formed on one surface of a long metal plate 3 provided on a base 2 having a pad 1. By providing a resin film 5 on which the metal film 4 is formed, and supplying air between the resin film 5 and the metal plate 3 through an air supply unit 6 connected to the metal plate 3, each fine particle of the resin film 5 is formed. Fine bubbles are generated through the pores 4, and the aeration is replaced by the fine bubbles.

The scattered gas 10 constructed as shown in FIGS. 9 and 10 is placed on the bottom 12 in the aeration tank 11 shown in FIG. An air supply hose 13 is connected to the air supply hose 13. The air supply hose 13 is configured to supply air to the diffused gas 10 from outside through the air supply hose 13.
3 is guided through an opening 15 formed in a slag 14 which is a top plate of the aeration tank 11. The gas 10
As shown in FIG. 12, a plurality of are arranged on the bottom portion 12 so as to obtain an aeration effect on the entire bottom portion 12.

Various lifting devices have been developed for lifting or sinking the gas 10 from the aeration tank 11.
-64155 and JP-A-6-254586. First, the configuration disclosed in JP-A-52-64155 relates to a swirling flow type aeration.
Although not shown, the diffuser is pulled out of the aeration tank by rotating the diffuser and the conduit connected by 180 ° in the aeration tank. Further, in the air diffusing device disclosed in Japanese Patent Laid-Open No. 6-254586, although not shown, the air diffusing section is moved up and down via a guide mechanism comprising a rail provided on the side wall of the aeration tank.

[0008]

Since the conventional apparatus for elevating and lowering the diffused gas in the aeration tank is configured as described above, there are the following problems. That is, in the case of the configuration disclosed in the above-mentioned Japanese Patent Application Laid-Open No. 52-64155, the diffuser and the conduit are rotated by 180 ° and the diffuser is pulled out of the aeration tank. However, at the center position of the aeration tank, it is possible, but at both ends near the side wall, the rotating diffuser and the wall interfere with each other, and it is impossible to lift the diffuser. Further, Japanese Patent Application Laid-Open No. 6-2545
In the configuration disclosed in Japanese Patent Publication No. 86, it is useful when the length of the air diffuser is short. However, in the method of performing aeration over the entire bottom, a horizontal guide rail as a guide mechanism becomes an obstacle, and Not suitable for ceremonies. Further, in any of the above-described configurations, the opening of the slag of the aeration tank becomes large, and the work becomes difficult due to odor leakage and the like.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and in particular, it has made the scattered gas freely rotatable with respect to the longitudinal guide member and in parallel with the longitudinal guide member. It is an object of the present invention to provide an apparatus for elevating and lowering a gas diffused in an aeration tank, which is vertically aerated and can reduce the size of an opening formed in the aeration tank.

[0010]

According to the present invention, there is provided an apparatus for raising and lowering gas in an aeration tank according to the present invention, wherein the gas is disposed at the bottom in the aeration tank, and fine gas is generated by the gas to activate the activated sludge. In the apparatus for elevating and lowering the diffused gas in the aeration tank, which performs the water purification process and raises and lowers the diffused gas in the aeration tank, the guide is movably engaged with a longitudinal guide member provided vertically in the aeration tank. One end of the diffused gas is rotatably connected to the guide via a hinge, and the diffused gas is rotated in a state parallel to the longitudinal guide member and along the longitudinal guide member together with the guide. The guide is configured to be able to move up and down, the guide is located on the outer periphery of the longitudinal guide member and has a ring shape, and the guide is connected to a longitudinal member for lifting. A tip end of the diffuser gas is configuration for turning the longitudinal member is connected, also, the dispersion gas,
It is configured to include a metal plate provided on a gantry and a resin film provided on one surface of the metal plate and having a number of fine pores formed therein.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of a device for elevating and lowering gas in an aeration tank according to the present invention will be described below with reference to the drawings. The same or equivalent parts as those in the conventional example will be described using the same reference numerals. In FIG. 1, what is indicated by reference numeral 10 is gas diffusion. The gas diffusion 10 is provided with a metal plate 3 on a pedestal 2 provided with a pad 1 similarly to FIG. Is provided. An air supply hose 13 connected to the gas diffuser 10 is led out through an opening 15 formed in a slab 14 serving as a top plate of the aeration tank 11.

A ring-shaped guide 20 is provided on the base 10a of the gas diffuser 10, and the gas diffuser 10 is provided rotatably with respect to the guide 20 via a hinge 21 provided on the guide 20. ing. The elongate elongate member 2 composed of a chain, a rope or the like connected to the guide 20
Numeral 2 is led out through the opening 15, and a turning elongate member 23, such as a chain or a rope, connected to the tip 10 b of the gaseous gas 10 is led out through the opening 15.

At the side of the side wall 11a of the aeration tank 11, a long guide member 24 having a rod shape or a cylindrical shape is provided.
And its upper end 24b is fixed to the inner wall of the opening 15. The guide 20 includes the longitudinal guide member 24.
The longitudinal guide member 24 is configured to penetrate the guide 20 so as to be vertically movable at an outer peripheral position of the guide member 20.
FIGS. 3, 4 and 5 show the configuration of FIG. 1 in an enlarged manner in more detail. The longitudinal guide member 24 and the guide 20 are formed in a square shape to prevent rotation. Indicates a pin 21a of the hinge 21 in a plan view.

Next, the operation will be described. In addition, since the weight of the diffused gas 10 is about 20 kg and is horizontal, it can be lifted without using power. Therefore, first, by sending air to the scattered gas 10 through the air supply hose 13 in the state of FIG. 1, a large number of fine bubbles are generated in the aeration tank 11 through each fine pore 4 of the resin film 5, A well-known aeration effect on sewage is obtained, and aerobic treatment of sewage is performed. When swirling the diffused gas 10 in the aeration tank 11, the diffused gas 10 is slightly lifted by the elongating longitudinal member 22, and then vertically moved as shown in FIG. Can turn.

Next, when the gaseous dispersion 10 is lifted and pulled out for cleaning or the like of the gaseous dispersion 10, when the elongating member 22 is withdrawn, the guide 20 rises along the longitudinal guide member as shown in FIG. Sprayed gas 10 is hinge 21
Is rotated downward along the longitudinal guide member 24, and the diffused gas 10 is drawn out from the opening 15 to the outside.

Next, when cleaning or replacement of the diffused gas 10 is completed, and when the gas diffuser 10 is to be inserted back into the aeration tank 11 and returned, as shown in FIG. 7
8, that is, the state shown in FIG. 2 in a direction opposite to that of FIG. 2, the scattered gas 10 is lowered downward while being suspended by the turning elongate member 23, and when the guide 20 reaches the bottom 12,
Are in a horizontal state as in FIG. Although the above-described guide 20 has been described as a case in which the guide 20 is penetrated and engaged with the rectangular long guide member 24 as a rectangular ring, the present invention is not limited to this configuration. When a groove is formed in the groove 24 and a plate-shaped guide 20 having a hinge 21 is engaged in the groove, the same operation and effect as described above can be obtained. Further, the structure of the diffused gas 10 is not limited to the above-described structure, and another structure can be used.

[0017]

As described above, the apparatus for raising and lowering the diffused gas in the aeration tank according to the present invention has the following effects. That is, since the guide provided with the diffused gas via the hinge is freely movable up and down via the longitudinal guide member, the diffused gas can be rotated in parallel with the longitudinal guide member to penetrate the opening of the aeration tank, The opening can be made much smaller than before, the amount of odor of wastewater leaking to the outside can be significantly reduced, and workability and environmental considerations can be improved. Further, since the diffused gas can be easily taken out, maintenance of the diffused gas is greatly facilitated.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a device for elevating and lowering diffused gas in an aeration tank according to the present invention.

FIG. 2 is a sectional view showing an operation state of FIG. 1;

FIG. 3 is an enlarged schematic view showing the state of FIG. 1;

FIG. 4 is an enlarged view showing a main part of FIGS. 1 and 3;

5 is a plan view of FIG. 4,

FIG. 6 is an explanatory view showing a rotation operation of FIG. 1;

FIG. 7 is an explanatory view showing a lifting state of FIG. 6;

FIG. 8 is an explanatory view showing a suspended state of FIG. 6;

FIG. 9 is a perspective view showing a main part of gas diffusion according to the related art and the present invention.

FIG. 10 is a sectional view showing a main part of FIG. 9;

FIG. 11 is a schematic configuration diagram showing a conventional aeration tank.

FIG. 12 is a plan view of FIG. 11;

[Explanation of symbols]

 2 Mount 3 Metal plate 4 Micropore 5 Resin film 10 Spread gas 10a One end 10b Tip 11 Aeration tank 12 Bottom 20 Guide 21 Hinge 22 Lifting elongate member 23 Revolving elongate member 24 Elongate guide member

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Munetaka Shibata 5-48-16 Sakuragaoka, Setagaya-ku, Tokyo Waterworks Co., Ltd. F-term (reference) 4D029 AA01 AB06 DD01

Claims (4)

[Claims] 1. A sparged gas (10) is disposed at a bottom portion (12) in an aeration tank (11), and fine bubbles are generated by the sparged gas (10) to purify sewage by activated sludge treatment. In the apparatus for elevating and lowering the diffused gas in the aeration tank configured to raise and lower the diffused gas (10) in the aeration tank (11), the aeration tank (1
1) Guide (2) to the longitudinal guide member (24) provided vertically inside
0) so as to freely move up and down, and one end (10a) of the diffused gas (10).
Is rotatably connected to the guide (20) via a hinge (21), and the scattered gas (10) is rotated in a state parallel to the longitudinal guide member (24) to move together with the guide (20). An apparatus for elevating and lowering diffused gas in an aeration tank, wherein the apparatus is configured to be able to ascend and descend along the longitudinal guide member (24). 2. The guide (20) is provided with the longitudinal guide member.
2. A device for raising and lowering gas in an aeration tank according to claim 1, wherein said device is located on the outer periphery of (24) and has a ring shape. 3. The elongate member for lifting is provided on the guide (20).
(22) is connected, and a turning elongate member (23) is connected to a tip (10b) of the gas diffusion (10), The gas diffusion in the aeration tank according to claim 1 or 2, wherein lift device. 4. The gas diffuser (10) includes a metal plate (3) provided on a gantry (2) and a plurality of fine pores (4) formed on one surface of the metal plate (3). 4. A device for raising and lowering gas in an aeration tank according to claim 1, wherein said device comprises a resin film.