JPS6017279Y2 - Diffuser plate type air diffuser - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an aeration plate type aeration device used in an aeration tank of a sewage treatment device using an activated sludge method or a sewage treatment device for factory wastewater.

Conventionally, as an aeration plate type aeration device used in an aeration tank of a sewage treatment device or a sewage treatment device, for example, a box-shaped frame is attached to a flat support plate to form a compartment. An air supply pipe is provided in the center of the support plate so as to communicate with the support plate, and a gap forming member is interposed between a plurality of porous air diffusers and the support plate on the other side of the support plate to form independent air diffusers. The air chambers are fixedly and airtightly installed, and each air chamber and the compartment are communicated with each other through a required number of air introduction holes drilled in the support plate, so that the air is introduced into the compartment from the air supply pipe. Air is supplied to the air chamber through the air introduction hole, and countless microscopic bubbles are generated from the air diffuser plate and sent into the wastewater to dissolve oxygen; increasing efficiency promotes the decomposition of waste in the wastewater. something is generally known.

However, since an air diffuser with such a structure simply has a box-shaped frame attached to a flat support plate, the support plate must be quite thick in order to satisfy the strength of the device. Therefore, there was a problem in that the manufacturing cost was high.

The present invention was made in order to eliminate the drawbacks of the conventional ones as described above, and it has two beads parallel to the longitudinal centerline of the supporting plate at approximately equal intervals from the centerline on one side of the support plate. protrude, attach a flat plate between the tops of these two beads,
It is an object of the present invention to provide a diffuser plate type air diffuser which has high strength and excellent economic efficiency by sealing the space between the ends of the flat plate and the support plate to form compartments.

An embodiment of this invention will be described below with reference to the drawings.

Reference numeral 1 denotes a rectangular support plate made of stainless steel or the like, and this support plate 1 has two beads 2 parallel to the center line at approximately equal intervals from the center line in the longitudinal direction, that is, on the lower surface of the support plate. A substantially ■-shaped concave groove forming a crest is provided protrudingly.

A required number of air introduction holes 3 communicating with a plurality of air chambers to be described later are bored at regular intervals in the opposing inclined walls 2a of the two beads 2.

Then, a frame is passed between the tops of these two beads 2, and a bottom plate 4 is attached by gluing, welding, etc. At both ends of the bottom plate 4, rising portions 4a reaching the lower surface of the support plate between the beads are formed as extensions. The gap between the bottom plate 4 and the support plate 1 is sealed by welding to form an airtight compartment 5.

In this case, instead of sealing with the rising portion of the bottom plate 4, another sealing member may be used for sealing.

Next, an air supply pipe 6 is connected to the compartment 5 approximately at the center of the upper surface of the support plate 1 and installed by welding or the like.

Next, on the upper surface of this support plate 1, as shown in FIG. A gasket 8 as a gap-forming member having a protrusion almost matching the shape of the trough is interposed, and is placed on the support plate 1 so that a part thereof straddles the bead, and the air diffuser plate 7 and Independent airtight air chambers 9 corresponding to the number of air diffusers are formed between the support plates 1.

These air chambers 9 are connected to the air chambers 5 through the air introduction holes 3 mentioned above.
communicate with.

Incidentally, each of the air diffuser plates 7 is appropriately fixed by a presser metal fitting 10.

Further, in the above embodiment, the protrusion corresponding to the shape of the bead 2 trough of the packing 8 was integrally molded, but the packing 8 was simply made into an annular shape, and the opposing protrusion of the bead 2 was separately sealed to form the air chamber 9. Yes.

The air diffuser plate type air diffuser of the present invention introduces air by submerging it in an aeration tank as usual, and connecting the air supply pipe 6 to an air supply device (not shown) to forcefully feed air into the compartment 5. Air is supplied to each air chamber 9 through the holes 3, and is dispersed from the air diffuser plate 7 into the waste water in the form of countless fine bubbles.

In this case, in particular, since the support plate 1 has two beads 2 protruding in the longitudinal direction, the bending strength of the support plate 1 in the longitudinal direction is significantly increased.

In addition, since the air introduction holes 3 are provided in the bead slanted walls facing each other in an abbreviated form in the compartment 5, the air supply direction to each air chamber is slanted toward the wide surface on the back of the diffuser plate. can be selected to be carried out, which improves the diffusivity of air bubbles and significantly increases the aeration efficiency.

As described above, according to this invention, two beads are integrally provided on the support plate, and a compartment for air supply is constructed between the beads. The structure is significantly simplified compared to the one in which compartments are attached, and the strength of the support plate is maintained appropriately due to the formation of the beads, and manufacturing costs can be significantly reduced because a relatively thin plate material is sufficient. .

At the same time, this type of air diffuser has practical effects, as the device is lightweight and easy to handle during product transportation, installation in a sewage tank, and removal when replacing the air diffuser plate. It has great industrial utility value.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing one embodiment of the invention, Fig. 2 is a partially cutaway front view of the same, Fig. 3 is a sectional view taken along line A-A showing the main parts, and Fig. 4 is an embodiment of the invention. It is a perspective view which shows the attachment state of the air diffuser plate which shows the example with a part cut away. 1... Support plate, 2... Bead, 3...
... Air introduction hole, 4 ... Bottom plate, 5 ...
... Compartment room, 6 ... Air supply pipe, 7 ... Air diffuser plate, 8 ... Packaging, 9 ... Air chamber.

Claims (1)

[Scope of utility model registration request] Two beads are protruded from one side of the support plate at approximately equal intervals from the center line in the longitudinal direction and parallel to the center line, and the bottom plate is installed by passing the frame between the tops of these two beads. , sealing gaps with the support plate at both ends of the bottom plate to form a compartment by the support plate, bead, and bottom plate, and providing an air supply pipe communicating with the compartment on the other surface of the support plate,
A gap forming member is interposed between the plurality of air diffusers and the support plate to form an airtight air chamber across the bead, and the air chamber and the compartment are connected to each other by drilling a hole on the compartment side of the bead. 1. A diffuser plate type air diffuser characterized by communication through a required number of provided air introduction holes.