JPH06341128A - Filtering-body circulation type dust collector - Google Patents

Abstract

PURPOSE:To remove refuse positively by bending, zigzag moving and stretching an endless screen, in which punching metals are connected continuously, in the flow direction of a channel and installing a collecting discharging device of refuse to the upper section of the screen. CONSTITUTION:The endless screen 7 of a filtering-body circulation type refuse collector 2 is disposed in tension in parallel with the direction of the streamline of a channel 1 and in a meandering manner in water. When sewage is flowed in on the inner circumferential side of the screen 7 disposed so as to be circulated and driven in the channel 1, refuse, etc., in sewage are captured on the internal surface side of the screen 7, and scraped up upward. The leaves of trees, etc., captured by the screen 7 are removed by the infection of the wash water of a nozzle 4N for washing, and tangled refuse is taken off by a nozzle 4M for washing and dropped into a collecting discharging device 8. Accordingly, captured refuse can be removed positively and easily.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filter body circulation type dust remover having an endless screen.

[0002]

2. Description of the Related Art Rainwater that falls in urban areas and domestic wastewater is
After being collected at the sewage treatment plant through the underdrain / sewer, and removing the debris contained in the sewage, the sewage is either directly or pumped up and sent to the treatment tank for treatment, or if it is rainwater, the river It has been released to. A bar screen, a mesh screen, etc. are generally used to remove dust contained in the sewage.

[0003]

However, when a bar screen is used to remove dust and the like contained in sewage, the effective passage area of the screen can be reduced by reducing the mesh width of the screen to capture fine dust. It becomes less, and there is an obstacle when processing a large amount of wastewater such as during rainfall, but if the screen width is increased on the contrary, it is not possible to capture fine dust. The string-like dust had a problem that it was easier to come off than the screen eyes. In addition, when a mesh screen is used, dust is easily entangled in the mesh, and reliable removal is difficult. Especially, in a screen using a general wire mesh as a mesh screen, the leaves can be easily removed,
The string-like dust gets into the intersection of each wire of the screen and is wound or entangled.It is difficult to remove it, and clogging progresses, and the water flow performance of the screen deteriorates. Was there.

An object of the present invention is to provide a filter-circulation type dust remover capable of surely removing various kinds of dust contained in sewage and having less deterioration in water-passing performance of a screen.

[0005]

In order to achieve the above-mentioned object, a filter body circulation type dust remover of the present invention comprises an endless screen constituted by connecting punching metals having a large number of holes, to a screen surface. Is bent in the vertical direction at a plurality of locations at the lower position in the flow direction of the water channel and meanders in water, and the inner and outer peripheral sides of the screen are connected to the upstream or downstream end of the screen. The gist is that they were alternately closed at. In this case, it is desirable to stretch the upper part of the screen so that it is located above the water.

[0006]

[Function] By constructing the endless screen of the filter circulation type dust remover with punching metal, various dust contained in the sewage can be reliably captured, and the captured dust may be wound around the screen. It is difficult to get entangled and can be easily removed. Further, by bending the screen at a plurality of places and winding the screen in a zigzag manner, it is possible to secure a large effective passage area of the screen even when the water depth of the water channel is shallow. Further, by tensioning the upper part of the screen so as to be located above the water, it is possible to reliably and easily remove the trapped dust.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The filter body circulation type dust remover of the present invention will be described below with reference to the illustrated embodiments. In the figure, reference numeral 1 denotes a water channel, and a filter body circulation type dust remover 2 mainly having an endless screen 7 in which punching metal is connected endlessly is installed in the water channel 1. The filter body circulation type dust remover 2 rotatably supports a roller or wheel 5 driven by a drive device and a plurality of driven rollers or wheels 6 and 6 on a main body frame 3 installed on a water channel, and An endless screen 7 is stretched around the roller or wheel 5 and the driven rollers or wheels 6 and 6 so that the screen 7 meanders in water. The endless screen 7 is arranged so that its lower portion reaches near the bottom of the water channel 1, and the screen 7 is provided at the upstream or downstream end of the screen 7.
The inner peripheral side and the outer peripheral side are alternately closed, the upper part of the screen 7 is positioned above the water, and the dust collecting and discharging device 8 for the dust trapped by the screen 7 is provided inside thereof.

The endless screen 7 has a required width according to the required capability of the screen and a length (total length) according to the water depth of the water channel, and the screen 7 is required to be a flat flat plate. A punching metal having a large number of holes H having a required diameter is connected endlessly at a pitch of. The length of the punching metal is appropriately determined so that the screen 7 can be smoothly bent at the position of the roller or wheel 5 and the driven rollers or wheels 6 and 6.

The holes H of the punching metal used for the endless screen 7 may be arranged in either an aligned arrangement or a staggered arrangement, but the line connecting the centers of the adjacent holes H with respect to the reference line M is preliminarily set. It is desirable to arrange them so as to have a predetermined angle, and in this case, the dust G trapped on the screen 7 is removed by giving a force to strip in the direction of the reference line.

At a position above the water surface of the endless screen 7, a removing means for removing dust captured by the screen 7 from the screen 7 is provided. As shown in the figure, this removing means is provided with a cleaning nozzle 4N which is disposed above the upper surface of the screen 7, that is, above the outer surface of the screen 7, and which is arranged so as to spray cleaning water substantially at right angles to the screen surface. The cleaning nozzle 4M is disposed at the lower surface side of the screen 7, that is, at a lower position on the inner surface side of the screen 7, and further so as to spray the cleaning water in the direction of the reference line M on the screen surface. As a result, of the dust trapped on the endless screen 7, the leaves and the like are removed by jetting the washing water of the washing nozzle 4N, while the string 7 is firmly attached to the screen 7 or wound or entangled. The dust is removed by spraying the wash water from the washing nozzle 4M, and the separated dust is dropped into the collecting and discharging device 8 and discharged.

A rotating brush 9 may be used as the removing means. The rotary brush 9 is provided on the upper surface side of the endless screen 7, that is, on the outer surface side of the screen 7.
The tip of the rotary brush 9 is arranged so as to come into contact with the screen surface, and the rotation direction thereof is arranged to be the same direction as the reference line M of the screen 7. This rotating brush 9
The dust G entangled in the hole H of the screen 7 due to the rotation of the
The entangled force of will be released and removed.

Further, as a removing means, a cleaning nozzle 4
It is also possible to use a combination of M and the rotating brush 9. In this case, the spray direction of the cleaning water of the cleaning nozzle 4M and the rotating direction of the rotary brush 9 are parallel to the reference line M of the endless screen 7, and the rotating direction of the rotary brush 9 and the spray of the cleaning water. Make sure the direction is opposite. That is, the direction in which the cleaning water from the cleaning nozzle 4M is jetted is opposite to the direction in which the screen 9 advances, and the direction in which the rotary brush 9 rotates is the same as the direction in which the screen 9 advances.
It is desirable to set the spraying speed of the cleaning water of the cleaning nozzle 4M to be higher than the rotating speed of the rotary brush 9.

The porosity of the punched metal forming the endless screen 7 is set to about 50 to 80% so that dust and the like contained in the sewage can be removed efficiently, and
It is desirable from the viewpoint of maintaining good water flow performance.

The filter body circulation type dust remover 2 is constructed as described above, and the endless screen 7 of the filter body circulation type dust remover 2 is immersed in water at a position parallel to the streamline direction of the water channel 1 and below. It is meandered and stretched. Then, when the sewage flows into the inner peripheral side surrounded by the endless screen 7 arranged to circulate in the water channel 1, dust and the like contained in the sewage is captured on the inner surface side of the screen 7, The dust captured by the circulation drive of the screen 7 is scraped upward. Then, the leaves and the like of the dust trapped on the endless screen 7 are removed by jetting the washing water of the washing nozzle 4N, and on the other hand, the screen 7 such as a string is firmly attached, wound or entangled. Garbage is cleaning nozzle 4
The cleaning water of M is sprayed to surely remove it, and the separated dust is dropped into the collecting and discharging device 8 and discharged.

In the embodiment shown in FIG. 1, the collecting / discharging device 8 is provided with a running water trough 81 inclined in the width direction of the endless screen 7, and a collecting trough 82 is connected to one end of the running water trough 81. Then, the dust collected in the trough 81 is further conveyed to the outside of the water channel through the collecting trough 82 and discharged.

[0016]

According to the filter body circulation type dust remover of the present invention, since the endless screen is made of punching metal, various dust contained in the sewage can be reliably captured, and The captured dust is less likely to be wrapped around the screen or entangled, and can be easily removed, and the water-passing performance of the screen does not deteriorate, so the dust contained in the sewage can be stably maintained for a long time. Can be removed. Furthermore, since the screen is bent at a plurality of locations and is stretched in a meandering manner in water, the effective passage area of the screen can be made large even when the water depth of the water channel is shallow. Further, by tensioning the upper part of the screen so as to be located above the water, it is possible to reliably and easily remove the trapped dust.

[Brief description of drawings]

FIG. 1 is a front view of a filter body circulation type dust remover of the present invention.

FIG. 2 is a side view of the same.

FIG. 3 is a front view of another embodiment of the filter body circulation type dust remover of the present invention.

FIG. 4 is an explanatory diagram of a screen of the present invention.

FIG. 5 is an explanatory diagram of dust trapped on the screen.

FIG. 6 is an explanatory diagram of removing dust trapped on a screen.

FIG. 7 is an explanatory diagram of an embodiment using a rotating brush.

[Explanation of symbols]

 1 Water Channel 2 Filter Circulation Dust Remover 4M Cleaning Nozzle 4N Cleaning Nozzle 5 Roller or Wheel 6 Roller or Wheel 7 Screen 8 Collecting and Ejecting Device 9 Rotating Brush M Reference Line H Hole G Garbage

Claims (2)

[Claims] 1. An underwater screen is formed by bending an endless screen, which is formed by connecting punching metals with a large number of holes, in the flow direction of a water channel and vertically at a plurality of positions below the screen surface. A filter body circulation type dust remover in which the inner peripheral side and the outer peripheral side of the screen are alternately closed at the upstream end or the downstream end of the screen. 2. The filter body circulation type dust remover according to claim 1, wherein an upper portion of the screen is stretched so as to be located above water.