JP3656137B2 - Dust removal equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a dust removing device installed in a water supply / sewer intake and other various water treatment facilities.
[0002]
[Prior art]
The water treatment facility is provided with a dust removal device, and the treated water flowing into the water treatment facility is separated from foreign substances such as oil balls and scum by the screen of the dust removal device, and then discharged into a public water area.
[0003]
If foreign matter clogs the screen, the effective passage area of the screen is reduced and the flow of the treated water is obstructed, making it impossible to treat the treated water efficiently. For example, it is necessary to periodically clean the screen to restore the screen function.
[0004]
Further, there has been proposed a dust removing device capable of efficiently treating treated water while suppressing an increase in loss head due to clogging of the screen even during use of the screen.
[0005]
As such a dust removing device, as shown in FIG. 9, a movable screen 101 is connected to an upper portion of a screen main body 100 by a hinge 102 so that the movable screen 101 can be raised and lowered, and a weight 104 is attached to a wire 103 connected to the upper end of the movable screen 101. As shown in FIG. 10, when a large amount of rainwater flows in and the water level of the treated water W rises, as shown in FIG. 10, water pressure acts on the movable screen 101 to cause the movable screen 101 to move. Falls over the weight 104, and the upper layer water W1 of the treated water W flows over the screen body 100 and is discharged downstream.
[0006]
However, in this dust removal apparatus, since the upper layer water W1 containing many impurities D is discharged downstream, there is a problem that the public water area is contaminated.
[0007]
Further, since the screen of the conventional dust removing device was a net type formed by knitting a metal wire, there was a problem that hair and string-like objects were easily entangled, and entangled hair was difficult to remove. there were.
[0008]
[Problems to be solved by the invention]
This invention is made | formed in view of said point, Comprising: The dust removal apparatus which can perform the efficient process water treatment without discharging upper-layer water containing many impurities is provided.
[0009]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the present invention provides a dust removing apparatus in which a screen is disposed in a water channel and a foreign substance is removed by the screen, and the screen is formed by stacking a plurality of screen divided bodies in the vertical direction. A float is attached to the screen divided body, and the upper screen divided body is lifted and lowered by a buoyancy of the float along with a change in the water level on the upstream side of the screen, and when the upper screen divided body rises, the upper screen screen A dust removing device characterized in that a gap is formed between the divided body and the lower screen divided body, and only the middle layer water upstream of the screen is discharged downstream through the gap. I will provide a.
[0010]
The screen is preferably a fine screen.
[0011]
Moreover, it is preferable that the screen is formed by arranging a plate-like screen material having a plate surface parallel to the water flow direction of the water channel in a lattice shape.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0013]
As shown in FIGS. 1 and 2, the dust removing device is disposed in a water channel 1 of treated water W such as sewage or rainwater, and has a fine screen 2 and a float 3 that floats the screen 2 by buoyancy. And a guide 5 having a guide groove 4 and a loading device 6 for the screen 2.
[0014]
The screen 2 is formed by stacking a plurality of screen division bodies 7 and 8 in the vertical direction. As shown in FIG. 4, the screen division body 7 positioned at the uppermost stage is configured by providing a frame body 7b on the outer periphery of the screen body 7a and attaching a roller 7c to a side frame material of the frame body 7b. Further, the screen division body 8 positioned below the uppermost screen division body 7 is configured by providing a frame body 8b on the outer periphery of the screen body 8a as shown in FIG.
[0015]
Further, as shown in FIG. 7, the float 3 is detachably attached to the front side (upstream surface) of the uppermost screen division body 7.
[0016]
The screen divided bodies 8 are detachably connected to each other by a connecting tool (not shown), whereby all the screen divided bodies 8 except the screen divided body 7 are integrated. Further, the uppermost screen divided body 7 and the screen divided body 8 immediately below the upper screen divided body 7 can be detachably connected by a connecting tool (not shown).
[0017]
As shown in FIG. 7, the guide 5 is fixed to both side walls of the water channel 1, the roller 7 c of the screen divided body 7 and the frame 8 a of the screen divided body 8 are fitted in the guide grooves 4 of the guide 5, and the screen 2 is connected to the water channel. 1 is erected vertically from the bottom surface.
[0018]
As shown in FIG. 6, the screen main bodies 7a and 8a of the screen divided bodies 7 and 8 are integrally formed bodies made of synthetic resin, stainless steel, aluminum or the like, and are formed in a lattice shape by the plate-like screen material 9 The screen surface 9a of the screen material is arranged in parallel with the water flow direction of the water channel 1 so that the depth dimension of the screen is increased. Further, the openings of the screen bodies 7a and 8a are set to 10 mm, for example.
[0019]
As shown in FIG. 1, a fine screen 10 (with a mesh width of, for example, 25 mm) is disposed in the water channel 1 upstream of the fine screen 2. An outer coarse screen (mesh width is, for example, 50 mm) is provided.
[0020]
FIG. 7 shows a state where contaminants D such as oil balls and scum are accumulated on the upstream side of the screen 2, the screen eyes are closed, and the water level of the upstream treated water W is raised. It is not in contact with the water W, and the space between the screen divided body 7 and the screen divided body 8 immediately below it is blocked.
Since a large amount of treated water W flows into the water channel 1 during rainy weather, the water level of the treated water W in the water channel 1 generally rises as shown in FIG. 8, and the water level between the upstream side and the downstream side across the screen 2 The difference increases. Then, when the float 3 is immersed in the treated water W, only the uppermost screen segment 7 is lifted by the buoyancy of the float 3. As a result, as shown in FIG. 8, a gap 11 is formed between the uppermost screen divided body 7 and the lower screen divided body 8 immediately below, and the middle layer water of the treated water W upstream from the gap 11. While W2 is discharged downstream, the water located in the upper layer of the upstream treated water W is blocked by the uppermost screen partition 7 and is not discharged.
[0021]
In this way, the upper layer water W1 containing a large amount of the contaminants D is not discharged, and only the middle layer water W2 that does not contain much contaminants D is discharged downstream, so that the treated water W can be efficiently processed. .
[0022]
On the contrary, when the water level is lowered, the uppermost screen divided body 7 is lowered together with the float 3 to close the gap 11, so that it is possible to prevent the upper layer water W <b> 1 from being discharged from the gap 11 as the water level is lowered.
[0023]
In this way, the rising height of the uppermost screen division body 7 is automatically changed according to the inflow amount of the treated water W, so that the upper layer water W1 containing a large amount of impurities D is converted into the uppermost screen division. It is not discharged beyond the body 7, nor is it discharged under the uppermost screen division body 7.
[0024]
When the layer of the upper water W1 containing a large amount of impurities D is thick, the uppermost screen divided body 7 and the screen divided body 8 immediately below the upper screen divided body 7 are connected by the connecting tool, and the two screen divided bodies 7 are connected. , 8 together with the float 3 can prevent the upper layer water W1 from being discharged. About the number of screen division bodies 7 and 8 to be moved up and down together with the float 3 and the dimensions of the screen division bodies 7 and 8, there is no particular limitation as long as only middle-layer water with few contaminants D can be discharged, The size of the buoyancy of the float 3 is also changed as appropriate.
[0025]
The treated water W from which the contaminants D have been removed by the dust removing device is discharged into a river by pumping up or the like, or sent to a treatment tank for treatment.
[0026]
Further, when the treated water W passes through the screen eye of the screen 2, as shown in FIG. 6, the treated water W flows along the plate surface 9a of the screen material 9, and the screen material 9 acts as a current plate like a fin. It functions and can suppress the occurrence of eddy currents or the like on the back surface of the screen 2. As a result, it is possible to prevent the hair or the like from being entangled with the screen material 9 and to pass the hair or the like.
[0027]
When cleaning the screen 2, as shown in FIG. 1, the wire 6 a is connected to the uppermost screen divided body 7, and the wire 6 a is wound up by the lifting device 6 to pull up the entire screen 2. At this time, the uppermost screen divided body 7 and the screen divided body immediately below the upper screen divided body 7 are connected by the connecting tool.
[0028]
The screen 2 pulled up is sprayed with high-pressure washing water from the back side (outflow side) toward the screen 2 to remove impurities D clogged in the screen. In this case, since no hair or the like is entangled with the screen 2, the screen 2 can be easily washed.
[0029]
【The invention's effect】
According to the dust removing device of the present invention, when the water level of the treated water upstream of the screen rises, it is possible to discharge only the middle layer water with less contaminants without discharging the upper layer water containing much impurities. In addition, the treated water can be efficiently treated without discharging treated water containing a large amount of oil or treated water with high turbidity.
[0030]
In addition, since the screen is controlled using only the buoyancy of the float, automatic operation is possible without using a power source such as a motor or a power transmission device. As a result, maintenance and management of the device becomes easy, personnel costs, etc. This is also advantageous in terms of cost and can prevent noise pollution.
[0031]
Further, since the screen is configured by arranging the plate-like screen material in a lattice shape so that the plate surface is parallel to the water flow direction of the water channel, the treated water is rectified along the plate surface of the screen material. As a result, it is possible to prevent the occurrence of turbulence or the like on the back side of the screen. As a result, it is possible to prevent hairs and strings from getting entangled with the screen, and the screen can be easily maintained and managed. Furthermore, since the rigidity of the screen with respect to the water pressure due to the water flow can be increased, a reinforcing material is not required, which is advantageous in terms of manufacturing cost.
[Brief description of the drawings]
FIG. 1 is a view showing a state where a dust removing apparatus according to the present invention is installed in a water channel.
FIG. 2 is a front view of the dust removing apparatus according to the present invention.
3 is a cross-sectional view taken along line XX of FIG.
FIG. 4 is a front view showing an upper screen divided body of the dust removing apparatus according to the present invention.
FIG. 5 is a front view showing a lower screen divided body of the dust removing apparatus according to the present invention.
FIG. 6 is a perspective view showing a screen of the dust remover according to the present invention.
FIG. 7 is a view showing a dust removing device according to the present invention.
FIG. 8 is a diagram showing the operation of the dust removing apparatus according to the present invention.
FIG. 9 is a view showing a conventional dust removing device.
FIG. 10 is a diagram illustrating the operation of a conventional dust removing device.
[Explanation of symbols]
W Treated water W1 Upper water W2 Middle water D Contaminant 1 Water channel 2 Screen 3 Float 5 Guide 7 Upper screen segment 8 Lower screen segment 9 Screen material 9a Screen surface 11 of the screen material Clearance

Claims (3)

In a dust removing device that arranges a screen in a water channel and removes impurities by the screen,
A plurality of screen divisions are stacked in the vertical direction to form the screen,
A float is attached to the upper screen divided body, and the upper screen divided body is moved up and down with a change in the water level upstream of the screen by the buoyancy of the float,
When the upper screen divided body rises, a gap is formed between the upper screen divided body and the lower screen divided body, and only the middle layer water upstream of the screen passes through the gap on the downstream side. A dust removing device configured to be discharged into The dust removing apparatus according to claim 1, wherein the screen is a fine screen. 3. The dust removing apparatus according to claim 2, wherein the screen is formed by arranging plate-like screen members having a plate surface parallel to the water flow direction of the water channel in a lattice shape.

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