JP3371270B2 - Scum transfer collection device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is applied to a first settling basin, a final settling basin, a headrace, etc. as a facility for purifying sewage by removing sedimentable solid matter and flocs floating in sewage. The present invention relates to a scum removing device for removing scum.

[0002]

2. Description of the Related Art A pipe skimmer system is often used in sewage treatment plants for removing scum and has a proven record. The principle of scum removal using this pipe skimmer is that the return flight above the water surface of a flight-type sludge scraper is used to scrape the scum up to the pipe skimmer, and periodically rotate (overturn) the notched pipe to create a notch. Overflowing from a part, scum on the water surface is put only in the pipe together with the overflowed water, and is discharged to the scum separator.

[0003]

However, there is a problem that the scum cannot be completely removed because the scraping up to the pipe skimmer is insufficient or only the scum near the pipe skimmer can be put in. As a result, the scum stays on the water surface for a long time to generate a bad odor, and the upper part of the scum is dried and solidified, which makes it more difficult to remove the scum. Further, there are problems that the rotating part of the pipe skimmer becomes rusty and becomes unrotatable, and that if the number of water channels increases, the water gradient of the pipe skimmer becomes smaller and the flow-down capability also decreases. . INDUSTRIAL APPLICABILITY The present invention solves the above-mentioned problems caused by the conventional pipe skimmer system, transports scum by the airflow, can efficiently collect the scum up to the scum suction port, and can efficiently discharge the collected scum. An object is to provide a scum transfer collection and removal device.

[0004]

In order to achieve the above object, a first aspect of the present invention is to arrange a plurality of rows at a predetermined interval in the scum transfer direction at a position near the water surface above the water surface.
A spray nozzle for transfer which sprays a spray of pressure fluid in a direction substantially parallel to the scum transfer direction.
And a scum transfer device consisting of
The middle part of the transfer direction of the
A collection box with a bottom plate that becomes shallow and shallow,
The scum transferred by the transfer device is stored in the collection box.
Along the inner wall, in the suction port of the scum provided at the key position of the fan
In a direction orthogonal to the scum transfer direction so that they gather together
A plurality of pressure fluids are provided by directing them to the suction port of the scum.
A ska consisting of a collection spray nozzle that ejects a spray.
Scum transfer collecting device characterized by comprising a collecting device
According to a second aspect of the present invention, there are provided the above-mentioned transfer device, the above scum collecting device, and the scum collecting device.
Suck the scum collected in the suction port of the scum
Consists of a pump and a discharge pipe for discharging the sucked scum
A scum transfer device characterized by being equipped with a scum removal device.
Ru Der proposes a collection apparatus. Also, the above scum transfer
In the collecting device, at the rear of the bottom plate, below the bottom plate.
A shielding plate was provided to prevent the cam from going under. Also, the above
Place the spray nozzle for collection inside the scum inlet.
Position facing the side and close to the water surface above the water surface
I installed it slightly horizontally.

[0005]

The transfer device sequentially ejects a spray of pressure fluid in the transfer direction from the transfer spray nozzle on the side far from the collector to transfer the scum. The collecting device sprays the pressure fluid ejected from the collecting spray nozzle toward the suction port of the scum, and along the collecting box having a substantially fan shape,
Collect the scum in the suction port of the scum provided at the position of the fan. The discharge device sucks the scum collected in the suction port of the scum by the pump and guides it to the scum storage tank through the transfer pipe.

[0006]

Embodiments of the present invention will now be described in detail with reference to the drawings. 1 is a flow chart of FIG. 1, FIG. 2 is a plan view of essential parts, FIG. 3 is a sectional view taken along line AA of FIG. 2, and FIG. 4 is a scum. 2 is an enlarged explanatory view showing a transfer state of the scum, FIG. 5 is a sectional view taken along line BB of FIG. 2, FIG. 6 is a sectional view taken along line CC of FIG. 6, and FIG. 7 is an enlarged explanatory view showing a state where the collected scum is sucked and discharged. FIG. 8 is a plan view showing a state in which the scum removing device is installed in the final settling tank, and FIG. 9 is shown in FIG.
FIG.

As shown in FIG. 1, the scum transfer collecting and removing device according to the present invention comprises a scum transferring device 1, a scum collecting device 2 and a scum removing device 3.
The respective configurations will be described.

The scum transfer device 1 is composed of transfer spray nozzles 10a, 10b to 10n arranged in a plurality of rows at predetermined intervals in the scum transfer direction above the water surface in the sedimentation basin. Referring also to FIGS. 2, 3 and 6,
A plurality of columns of support beams 12 are installed between the upper ends of the structures 11 and 11 'on both sides of the settling basin at predetermined intervals in the scum transfer direction. Posts 13 and 13 'are vertically provided near both ends of each support beam 12, and a girder material 14 is bridged therebetween.
Further, brackets 15 and 15 'are projected from both ends of the support beam 12 in the direction opposite to the scum transfer direction. And
Each of the beam members 14 has a plurality of transfer spray nozzles 10 arranged in parallel in a direction orthogonal to the scum transfer direction.
a, 10b to 10n are attached, and brackets 15,
Each of 15 'also has a wall surface spray nozzle 16
a, 16b to 16n are attached.

Transfer spray nozzles 10a, 10b-1
0n and spray nozzles 16a and 16b for cleaning wall surfaces
Each of 16n is integrated into one system by a water supply pipe 17, is connected to a pressure water pump 18 provided in water, and sprays pressure water from its tip. The transfer spray nozzles 10a, 10b to 10n adopt a flat spray shape, and the spray of the pressure water is scum at a position near the water surface above the water surface, specifically, within a range of 200 to 100 mm above the water surface. Good results are obtained by mounting at a slightly upward angle so as to eject in a substantially horizontal direction in parallel with the transfer direction of. This is because when the transfer spray nozzle is directed downward (toward the water surface), the jetted water hits the scum, which may cause the scum to break or temporarily settle, which may prevent efficient scum removal. .

As shown in FIG. 4, in the scum S, an air flow C is generated by the spray of pressure water ejected from the transfer spray nozzle 10a or the transfer spray nozzles 10b to 10n (not shown), and the air flow C is generated. Alternatively, it is transferred in the transfer direction by the blowing flow generated by the air flow C. In this case, the scum collecting device 2 is opened and closed by opening and closing the motor-operated valve.
By sequentially spraying from the transfer spray nozzle 10a on the side farther from the transfer spray nozzle 10n on the side closer to the scum collecting device 2, the amount of spray water can be minimized and the scum can be transferred efficiently. .

Referring to FIGS. 1 to 3 and 5, the scum collecting device 2 has a substantially fan-shaped collecting box 21 arranged on an extension of the scum transferring device 1 and a main position of the fan. It is composed of a collecting spray nozzle 23 that directs a spray of pressure water toward the suction port 22 of the provided scum.

At a predetermined position on the extension of the scum transfer device 1, the structures 11, 11 'on both sides constructing a sedimentation basin
A long frame-shaped support frame 24 is fixed between the upper ends of the support frames 24, and a substantially fan-shaped collection box 21 is attached to the lower end of the support frame 24. The collecting box 21 is formed such that the middle part of the scum transfer direction is shallower than the front part (on the side where the scum suction port 22 is arranged) (FIG. 3), and the water surface position is the shallow part. It is set higher than the bottom and lower than the upper end of the collection box 21. In this embodiment, the height of the collecting box 21 in the shallow part is 200 mm, and the water depth at this time is
It was set to 50 mm. The collection box 21 has no bottom plate in its rear opening and is formed only by the side wall 21a. Further, a shield plate 21b is provided at the rear of the bottom plate 21c in the shallow portion so that scum does not get below the bottom plate 21c. It is provided.
The front side of the shallow portion of the collection box 21 may be rectangular in plan view, and a fan-shaped side wall may be formed inside thereof.

A suction port 22 for the scum is provided at an essential position of the fan of the collection box 21. At the fan-shaped opening end of the collection box 21, a collection spray nozzle 2 for ejecting a spray of pressure water toward the suction port 22 of this scum.
A plurality of 3 are arranged in a direction orthogonal to the scum transfer direction. That is, the structures 1 on both sides constructing the sedimentation basin
A support beam 25 is installed between the upper end portions of 1 and 11 '. Struts 26 and 26 'are vertically provided near both ends of the support beam 25,
In the meantime, the girder material 27 is bridged. And this girder material 27
In addition, the collecting spray nozzle 23 is directed inward toward the suction port 22 of the scum in a parallel state, and in order to crush the hardened scum, the horizontal direction is slightly downward at a position close to the water surface above the water surface ( Install at 15 °). The collecting spray nozzle 23 is connected to the pressure water pump 18 via a water supply pipe 17 ', and sprays pressure water spray from its tip. The scum transferred by the scum transfer device 1 is gathered together in the suction port 22 along the inner wall of the collection box 21.

Next, referring to FIGS. 1 to 3 and 5, the scum removing device 3 sucks the scum collected in the suction port 22 of the scum of the collecting device 2 and the pump 31. And a discharge pipe 33 for discharging scum.

The pump 31 is a self-priming pump or the like, and a suction pipe 32 is provided on the suction side. Further, the pump 31 may be a submersible pump or a water-sealed vacuum pump. Suction tube 32
Is formed in a J shape, one end of which is connected to the suction side of the pump 31, and the other end of which faces the position directly below the water surface in the corner of the fan of the collection box 21. The scum collected by the collecting device 2 is sucked as the suction port 22.

The discharge pipe 33 is connected to the discharge side of the pump 31, conveys the sucked scum and stores it in the scum storage tank 40. The accumulated scum is sent by a pump through the inflow passage and is processed in the next step. Alternatively, this may be concentrated by flotation under pressure, and the concentrated scum may be dehydrated by a dehydrator.

FIG. 8 and FIG. 9 are a plan view and a sectional view showing a state in which the scum removing device is installed in the final settling tank. A sludge scraper 80 is provided in the pond for promptly removing the settled sludge. The sludge scraper 80
It is composed of two endless chains 81 to which a large number of scraping plates are attached, a pond bottom rail 82, and a sludge scraping machine driving device 83.

In the above embodiment, pressure water was used as the pressure fluid ejected from the transfer spray nozzle and the collection spray nozzle, but instead of this,
Alternatively, compressed air may be used together with this. When using pressure water and compressed air together, install a compressed air supply path from the compressor in a separate pipe in the pressure water supply path, and arrange the pressure water nozzle and the compressed air nozzle in parallel (vertical or horizontal direction). Direction) or by arranging a plurality of compressed air nozzles around the pressure water nozzle and ejecting two fluids. Further, the pressure water and the compressed air may be mixed.

[0019]

As described above, the scum transfer device according to the present invention is arranged in a plurality of rows near the water surface above the water surface, and sprays the pressure fluid in parallel with the transfer direction of the scum and substantially horizontally. Since a transfer spray nozzle that ejects in the direction is used and multiple rows are arranged in the scum transfer direction, the scum moves from the transfer spray nozzle far from the collecting device to the transfer spray nozzle near the collecting device. An air flow is generated by the spray of the pressure fluid that is sequentially ejected toward the air flow, and the air flow is efficiently transferred in the transfer direction by the air flow or the blowing flow generated by the air flow. In addition, a scum transfer collecting device including this scum transferring device and a scum collecting device including a spray nozzle for collecting and a fan-shaped collecting box collects the transferred scum along the inner wall of the collecting box. Forcibly gather at the suction port of the scum provided at the position. Then, the scum transfer device,
The scum transfer collection and removal device including a scum collection device and a scum removal device including a pump and a discharge pipe can suck the scum that has been transferred and collected from the scum suction port and efficiently remove it through the discharge pipe. effective.

[Brief description of drawings]

FIG. 1 is a flow chart showing an embodiment of a scum removing device according to the present invention.

FIG. 2 is a plan view of an essential part of FIG.

3 is a cross-sectional view taken along the line AA of FIG.

FIG. 4 is an enlarged explanatory view showing a transfer state of scum.

5 is a sectional view taken along line BB in FIG.

6 is a cross-sectional view taken along line CC of FIG.

FIG. 7 is an enlarged explanatory view showing a state in which collected scum is sucked and discharged.

FIG. 8 is a plan view showing a state in which the scum transfer collection / removal device is installed in the final sedimentation tank.

9 is a cross-sectional view taken along the line DD of FIG.

[Explanation of symbols]

1… Scum transfer device 2… Scum collecting device 3 ... Scum removal device 10a, 10b to 10n ... Spray nozzle for transfer 17 ... Water pipe 18 ... Pressure water pump 21… A collection box shaped like a fan 22 ... Scum suction port 23 ... Collecting spray nozzle 31… Pump 32 ... Suction tube 33 ... Discharge pipe 40 ... Scum storage tank

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masaaki Yoshino 1-3-3 Kyobashi, Chuo-ku, Tokyo Maesawa Engineering Co., Ltd. (56) References JP-A-52-90158 (JP, A) JP-A-SHO 51-140269 (JP, A) Actual Kaihei 3-123594 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) C02F 1/40 B01D 21/24

Claims (4)

(57) [Claims] 1. A plurality of rows are arranged at predetermined intervals in the scum transfer direction at a position close to the water surface above the water surface to spray a pressure fluid in parallel with the scum transfer direction and in a substantially horizontal direction. A scum transfer device consisting of a spray nozzle for transfer and a fan-shaped scum transfer method
The middle part of the direction is shallower than the side where the scum suction port is installed.
A collection box having such a bottom plate, and a scum transfer direction so that the scum transferred by the transfer device is gathered along the inner wall of the collection box to the suction port of the scum provided at the main position of the fan. A scum transfer collecting device comprising a plurality of scum collecting devices which are provided in a direction orthogonal to the scum, and each of which comprises a collecting spray nozzle for ejecting a spray of pressure fluid toward a suction port of the scum. 2. A plurality of rows are arranged at a predetermined interval in the scum transfer direction at a position near the water surface above the water surface to spray the pressure fluid in parallel with the scum transfer direction and in a substantially horizontal direction. A scum transfer device consisting of a spray nozzle for transfer, which has a substantially fan shape and is in the middle of the scum transfer direction.
The part is shallower than the side where the scum suction port is installed.
A collection box having a simple bottom plate, and the scum transferred by the transfer device is gathered along the inner wall of the collection box to the suction port of the scum provided at the main position of the fan so as to be orthogonal to the transfer direction of the scum. Multiple in the direction of
A scum collecting device composed of a collecting spray nozzle for ejecting a spray of pressure fluid toward the suction port of the scum, a pump for sucking the scum gathered at the suction port of the scum in the scum collecting device, and a suction pump A scum transfer collecting device, comprising: a scum removing device including a discharge pipe for discharging scum. 3. A scum at the rear of the bottom plate and below the bottom plate.
It is characterized in that a shielding plate is provided so that the vehicle does not get in
The scum transfer collecting device according to claim 1 or 2 . 4. The collecting spray nozzle is a scum
Be directed to the suction port and face inward, and above the water surface.
It is installed at a position close to the surface of the water and horizontally downwards.
In any one of Claim 1 thru | or 3 characterized by the above.
The scum transfer collecting device described.