JPH10156372A - Sewage treatment tank - Google Patents

Abstract

PROBLEM TO BE SOLVED: To supply air to an air lift pipe by providing a measuring, regulating and transporting device for transporting a prescribed amount of a sewage from one treating chamber to another treating chamber and executing a flow rate regulation with an air lift pipe raising the sewage and supplying the air diffused from a diffuser pipe to the air lift pipe. SOLUTION: In this sewage treating tank, a part of the sewage, sludge, etc., in the first treating chamber is returned to the second treating chamber by interposing the measuring, regulating and transporting device 5 and a transporting pipe 7. The measuring, regulating and transporting device 5 is composed of vessel part 9 temporarily storing the sewage from the air lift pipe 2 provided vertically in the first treating chamber, and an inside of the vessel part 9 is divided with an inner partition plate 10 into the chamber 11 and 12. An air lift pipe introducing hole 4a of the diffuser pipe 3 is arranged at downward of a lower end part of the air lift pipe 2, and in this way, the water to be treated in the air lift pipe 2 is pushed up by an air lift effect by supplying a part of the air diffused from the air lift pipe introducing hole 4a.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for adjusting and transferring a sewage treatment tank.

[0002]

2. Description of the Related Art As shown in FIG. 4, a conventional sewage treatment tank measuring, adjusting and transferring apparatus includes a pipe 102 connected to an air lift pipe 101 for raising sewage.
01 is known, in which air is fed into the air-conditioner 01 to raise sewage by an air-lift effect.

[0003]

However, in the conventional example, air is sent to the air lift pipe 101 from a pipe 102 different from a constantly used air diffuser, but the air blower and the pipe 102 are supplied from the same blower. Since air is sent to both sides, if air is sent from the pipe 102 to the air lift pipe 101, there is a disadvantage that the amount of air sent to the diffuser pipe is insufficient. The present invention has been made in view of this point, and an object of the present invention is to provide a sewage treatment tank that can supply air to an air lift tube without changing the amount of air sent to a diffuser tube. .

[0004]

The sewage treatment tank according to the first aspect of the present invention has a plurality of treatment chambers, and transfers a predetermined amount of sewage from one treatment chamber to another treatment chamber to adjust the flow rate. In a sewage treatment tank provided with a weighing adjustment transfer device for performing, the weighing adjustment transfer device includes an air lift pipe for raising sewage, and supplies air diffused from a diffuser pipe to the air lift pipe. It is assumed that.

[0005] A sewage treatment tank according to a second aspect of the present invention is the sewage treatment tank according to the first aspect, wherein the metering adjustment transfer device is attached to a partition between the treatment chambers. It is.

The sewage treatment tank according to claim 3 of the present invention is the sewage treatment tank according to claim 1 or 2, wherein a plurality of spaced-apart diffuser holes are formed in the diffuser tube, and the plurality of diffuser holes are formed. The diameter of some of the air diffusion holes is increased to form an air lift pipe introduction hole, and the lower end of the air lift pipe is disposed above the air lift pipe introduction hole.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a perspective view showing a sewage treatment tank measuring, adjusting and transferring apparatus according to one embodiment of the present invention. FIG. 2 is a sectional view of a sewage treatment tank according to the embodiment. FIG. 3 is a main part configuration diagram of a sewage treatment tank according to the same embodiment.

As shown in FIGS. 1 to 3, the sewage treatment tank has a plurality of treatment chambers, and a predetermined amount of sewage is transferred from one treatment chamber to another treatment chamber to adjust the flow rate. In the sewage treatment tank provided with the adjusting and transferring device 5, the metering adjusting and transferring device 5 includes an air lift pipe 2 for raising the sewage.
And air supplied from the air diffuser 3 is supplied to the air lift tube 2.

Then, a plurality of diffused holes 4 are formed at intervals in the diffuser tube 3, and the diameter of some of the diffused holes 4 among the plurality of diffused holes 4 is increased to form an air lift tube introduction hole 4a. The lower end of the air lift pipe 2 is arranged above the air lift pipe introduction hole 4a.

Hereinafter, the wastewater treatment tank will be described in more detail with reference to FIGS. This sewage treatment tank is constituted by a plurality of treatment chambers 1a, 1b, etc., which communicate with each other from the front end inlet a to the rear end outlet b.
In this sewage treatment tank, sewage entering from the front end inlet a shown in FIG. 2 is first treated in the treatment chamber 1b in the first stage, then enters the treatment chamber 1cc and treated in the second stage,
After entering the processing chamber 1a and being processed in the third stage,
After passing through the settling tank 1c, it is sterilized in the disinfecting tank 1d, and then the supernatant is discharged from the rear end outlet b.

The processing chamber 1a is an aeration chamber in which air from a blower (not shown) is sent through an air pipe 6, and a part of the sewage, sludge and the like in the processing chamber 1a. It is returned to the processing chamber 1b via the metering adjustment transfer device 5 and the transfer pipe 7.

A metering adjustment transfer device 5 is mounted on a partition wall between the processing chamber 1a and the disinfection tank 1d in the processing chamber 1a. Specifically, as shown in FIG. 1, the air lift pipe 2 of the metering adjustment transfer device 5 is attached to the partition between the processing chamber 1a and the disinfection tank 1d by an air lift holder 8.

As shown in FIG. 1, the metering adjustment transfer device 5 is vertically inserted into the processing chamber 1 a to raise sewage, and the upper end of the air lift tube 2 is inserted into the air lift tube 2. And a container section 9 for temporarily storing wastewater.

The container section 9 is open upward and has a bottom wall 9a and a peripheral wall 9b. The inside of the container section 9 is formed by a partition plate 10 into which the upper portion of the air lift pipe 2 is inserted. It is partitioned into one chamber 11 and a second chamber 12 for temporarily storing sewage discharged from the air lift pipe 2.

The partition plate 10 is for preventing sewage, sludge and the like discharged from the air lift pipe 2 from scattering over the weir section 13 to the transfer port side communicating with the transfer pipe 7.
Vertically elongated groove 1 provided facing the center of the inner surface of the
4, both sides of the partition 10 are inserted and held,
The lower end of the concave groove 14 is located above the bottom wall 9 a of the container 9, whereby the first chamber 11 is located between the lower end of the partition plate 10 and the bottom wall 9 a of the container 9. Second room 12
A sufficient gap is provided to allow communication between the and.

Below the lower end of the air lift tube 2,
An air lift pipe introduction hole 4a of the air diffuser 3 is arranged.
Therefore, the air sent from the blower to the air diffuser 3 via the air blower 6 is diffused from the air diffuser 4 and the air lift tube inlet 4a, but a part of the air diffused from the air lift tube inlet 4a. Is supplied to the air lift tube 2.

For this reason, the treated water in the air lift pipe 2 is pushed up to the container section 9 by the air lift effect. Thereby, air can be supplied to the air lift pipe 2 without changing the amount of air sent to the air diffuser 3. Also,
The capacity of the blower can be reduced.

In this case, since the diameter of the air lift pipe introduction hole 4a is larger than the diameter of the other air diffusion holes 4, a part of the diffused air can be easily supplied to the air lift pipe 2. .

Further, the metering adjustment transfer device 5 is mounted on a partition wall between the processing chamber 1a and the disinfection tank 1d. That is, since the air lift pipe 2 of the metering adjustment transfer device 5 is attached to the partition between the processing chamber 1a and the disinfection tank 1d by the air lift holder 8, the air supplied to the air lift pipe 2 can be lifted directly above.

On the other hand, the upper end of the air lift tube 2 is inserted into the first chamber 11 through the bottom wall 9 a of the container 9. An upper end opening 21 that opens upward is provided at an upper end of the air lift pipe 2, and a discharge port 19 that opens laterally is provided at a side surface.

A cap 20 is fitted into the upper end opening 21 by an interference fit. The cap 20 can be removed to clean the inside of the air lift tube 2 for cleaning. The discharge port 19 of the air lift tube 2 is always open.

The second chamber 12 of the container section 9 has a return port 15 for returning sewage into the processing chamber 1a having the air lift pipe 2 suspended therefrom, and a weir section for discharging sewage to the transfer port side by overflow. 13 are provided.

As shown in FIG. 1, a substantially U-shaped guide groove 16 having a predetermined depth is provided facing downward from the upper end of the peripheral wall 9b of the second chamber 12 at a predetermined depth. The cover 1 for adjusting the opening area of the return port 15 is provided in the guide groove 16.
7 is slidably fitted in the vertical direction. The upper half of the lid 17 has an opening 1 facing the return port 15.
8 is formed, and the opening area of the return port 15 can be changed by moving the lid 17 in the vertical direction.

In the processing chamber 1a, an aeration process is performed. Therefore, air is sent from the blower to the air diffuser 3 via the air blow pipe 6, and the sent air is diffused from the air diffuser 4 and the air lift pipe inlet 4a, but is diffused from the air lift pipe inlet 4a. Part of the air that has been removed
Supplied to

Then, due to the air lift effect, the processing chamber 1
The wastewater, sludge, etc. in a are lifted to the container part 9 by the air lift pipe 2 together with a part of the air diffused from the air lift pipe introduction hole 4a, and all of the air is discharged from the discharge port 19 of the air lift pipe 2 into the container part 9. After being discharged and temporarily stored in the container section 9, it overflows the weir section 13, flows out to the transfer pipe 7, and is returned to the processing chamber 1 b.

In this case, since the metering adjustment transfer device 5 is attached to the partition of the processing chamber 1a and the disinfection tank 1d in the processing chamber 1a, the sewage, sludge, etc. are transferred to the container section 9 by the air lift pipe 2. Can be lifted up. Therefore, sewage, sludge and the like can be lifted smoothly.

When adjusting the amount of water to be transferred, the lid 17 is lowered. When the lid 17 is lowered to the lowermost position, the return port 15 is fully opened, and all the waste water and the like from the air lift pipe 2 is returned from the return port 15 into the processing chamber 1a. In this manner, the amount of water transfer can be controlled by changing the opening area of the return port 15 by sliding the lid 17 up and down, and the workability is extremely good.

[0028]

The sewage treatment tank according to claim 1 of the present invention has the following features.
By supplying the air to be diffused to the air lift tube,
The treated water in the air lift pipe is pushed up to the container by the air lift effect. Thereby, air can be supplied to the air lift tube without changing the amount of air sent to the air diffuser tube.

The sewage treatment tank according to the second aspect of the present invention can lift the air supplied to the air lift pipe right above, in addition to the effect of the sewage treatment tank according to the first aspect. Therefore, sewage, sludge and the like can be lifted smoothly.

The sewage treatment tank according to claim 3 of the present invention has the following advantages in addition to the effects of the sewage treatment tank according to claim 1 or 2.
It becomes easy to supply a part of the diffused air to the air lift tube.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a sewage treatment tank metering adjustment transfer device according to one embodiment of the present invention.

FIG. 2 is a sectional view of a sewage treatment tank according to the embodiment.

FIG. 3 is a main part configuration diagram of a sewage treatment tank according to the embodiment.

FIG. 4 is a perspective view of a conventional example.

[Description of Signs] 1 processing chamber 2 air lift tube 3 diffuser tube 4 diffuser hole 4a air lift tube introduction hole 5 metering adjustment transfer device

Claims (3)

[Claims] 1. A sewage treatment tank provided with a plurality of treatment chambers and provided with a measurement adjustment transfer device for transferring a predetermined amount of sewage from one treatment chamber to another treatment chamber and adjusting a flow rate. A sewage treatment tank, wherein the transfer device includes an air lift pipe for raising sewage, and supplies air diffused from an air diffuser pipe to the air lift pipe. 2. The sewage treatment tank according to claim 1, wherein the metering adjustment transfer device is attached to a partition between the processing chambers. 3. A plurality of air diffusion holes spaced apart from each other in an air diffusion tube, and a diameter of a part of the air diffusion holes is increased to form an air lift tube introduction hole. The sewage treatment tank according to claim 1 or 2, wherein a lower end portion of the air lift pipe is disposed above.