JPH06287928A - Filter element moving type dust collector - Google Patents

Abstract

PURPOSE:To surely remove thin dust and the like such as a film or string from a screen by a little washing eater. CONSTITUTION:A required endless belt type screen 7 is stretchedly arranged in parallel with a waterway 1 so as to be submerged below the water of the waterway 1. The belt type screen 7 is driven to rotate, and dust caught or hooked on the screen is removed. A washing nozzle 9 is provided to jet washing water toward either the upper face side or the lower face side of the screen or both sides on the above position of the water surface in the belt type screen 7. A reflecting plate 10 to reflect the water is provided on the opposite side of the screen, after washing water jetted from one side of the screen is passed through the screen. Hereby the washing water is passed through the screen twice in the different directions, and hence dust and the like traring stuck to the screen can be stripped off by a little washing water.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention ensures that dust, which is attached to or entangled with an endless belt type screen during sewage treatment, and other fine dust such as films and strings, can be reliably removed from the screen with a small amount of cleaning water. The present invention relates to a movable filter body type dust remover.

[0002]

2. Description of the Related Art Rainwater that falls in urban areas and domestic wastewater is
After being collected at a sewage treatment plant through an underdrain / sewer, etc., and after removing the dust, etc. contained in the sewage here, this sewage can be treated directly or by pumping it up to the next treatment tank, or if it is rainwater. Then it is released to the river. A bar screen or the like is generally used to remove fine dust in the sewage.

[0003]

However, when a screen-like screen is used for removing fine dust as in the prior art, the effective passage area of the screen is reduced by reducing the mesh width of the screen, which is common in rain and the like. If a large amount of sewage is poured into the wastewater for treatment, the loss will be large, and film and string-like dust is more likely to come off than the screen mesh, and in the case of a mesh screen, dust is easily entangled and reliable removal is difficult. Met. Also, with a mesh screen or a screen using punching metal, the leaves and the like in the dust can be easily removed, but the long and slender string-like substance is entangled or entangled in the eyes of the mesh screen, which is difficult to remove, and clogging occurs. However, there is a drawback that the water flow capacity of the screen is deteriorated.

An object of the present invention is to reliably remove even film or string-like dust that is wound around the screen or entangled with a small amount of cleaning water to remove dust.

[0005]

SUMMARY OF THE INVENTION The present invention has been made to achieve the above object, in which a required endless belt type screen is arranged in a stretched manner so as to be parallel to a water channel and to be submerged below the water surface of the water channel. At the same time, in the filter body moving type dust remover in which the belt type screen is rotationally driven and the dust trapped on the screen or removed by the screen is removed, the screen is located above the water surface of the belt type screen. A cleaning nozzle that sprays cleaning water toward the screen surface is provided on either or both of the upper surface side and the lower surface side of the screen, and after the cleaning water sprayed from one surface side of the screen passes through the screen, The gist of the present invention is to provide a reflection plate for reflecting the light on the opposite side.

[0006]

[Operation] An endless belt-shaped screen of rotating mesh or punching metal is installed in the water channel,
By passing the sewage through the screen, the dust in the sewage is filtered and captured, and the screen dust is scraped above the water surface by the movement of the screen. Then, a cleaning nozzle for spraying cleaning water to remove dust adhering to the screen at a position above the water surface and a reflecting plate are arranged facing each other on both upper and lower sides of the screen so that they pass through the screen. The washed water is reflected by the reflection plate and again passes through the screen in the opposite direction. As a result, the cleaning water sprayed from the nozzle is
Because it passes the screen twice in different directions,
It is possible to reduce the amount of washing water and remove the dust and the like adhering to the screen.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on the illustrated embodiments. In the figure, reference numeral 1 designates a water channel, and a filter body moving type dust remover 2 which mainly comprises a belt type screen having a mesh of a required mesh or an endless punching metal is installed. This filter body moving type dust remover 2 has a body frame 3 installed on a water channel.
And rotatably supports a roller or wheel 5 driven by a drive device and a plurality of driven rollers or wheels 6, 6, and these rollers or wheels 5, 6, 6
The endless belt type screen 7 is looped or folded in two as shown in the drawing, and the lower part of the two folded belt type screen 7 reaches almost the bottom of the water channel 1. It is arranged in a stretched manner, and a screen residue collecting / discharging device 8 is provided in the screen 7.

The belt type screen 7 has a required width according to the ability of the screen and a length (total length) according to the depth of the water channel, etc., and a mesh having a mesh width suitable for the screen is provided over almost the entire length. It has a mesh or holes of the required diameter and a punching metal with a large number of holes perforated at the hole pitch, and this is joined endlessly. The screen thickness is the position of the screen where the wheels or rollers 5 and 6 are located. Set it appropriately so that it can be bent smoothly.

Further, cleaning nozzles 4 and 9 are provided above the water surface of the belt-type screen 7 for removing the screen residue such as tree leaves and string-like dust adhering to and scraped from the screen from the screen surface. Prepare As shown in the figure, the cleaning nozzle 4 is arranged on the upper surface side of the belt type screen 7, that is, on the upper surface side of the back surface of the screen so that the cleaning water is sprayed almost at a right angle to the screen surface, whereby it is attached to the screen. The leaves and the like are peeled off and dropped into the screen residue collecting and discharging device 8.

The other cleaning nozzle 9 is arranged on the lower surface side of the belt type screen 7, that is, on the lower surface side of the screen, and so that the cleaning water is sprayed at a predetermined angle with respect to the screen surface. This cleaning nozzle 9
Is designed to spray cleaning water from the upstream side to the downstream side in the direction of movement of the belt type screen, and at a predetermined angle, so that the string-like dust attached or wrapped around the screen is opposite to the direction of movement of the screen. In this direction, the cleaning water pressure acts so as to be separated from the screen, so that the dust around the screen can be surely separated.

Further, the cleaning water sprayed onto the upper and lower surfaces of the screen, or one of the screens, and the cleaning water that has passed through the screen is reflected again on the screen surface, and the reflecting plate 10 is made to pass through the cleaning water. The installation angle is set equal to θ. The reflecting plate 10 faces the cleaning nozzles 4 and 9 with the screen sandwiched therebetween, but in addition to the flat plate-shaped one, it may be formed in a concave shape to have a water collecting property. Further, the fan-shaped jet angle of the nozzle for jetting the washing water can be made small, and the number of nozzles can be increased to reduce the spread after the washing water is reflected by the reflecting plate, and the washing water can be effectively utilized.

Instead of the cleaning nozzle 4, a rotating brush 11 can be provided on the upper surface side of the screen. In this case, it is desirable that the brush comes into contact with the upper surface of the screen at the position where the lower surface of the screen is in contact with the cleaning water from the cleaning nozzle 9.

Therefore, when sewage is introduced from the inner side surface of the belt type screen 7 arranged to be driven to rotate in the water channel 1, the screen residue in the sewage water is captured on the inner side surface of the screen, and then the screen is removed. By turning, the captured screen residue is scraped above the waterway. The dust adhering to the screen surface is separated from the screen surface by spraying cleaning water at a right angle from the upper surface of the screen with a cleaning nozzle, or by the rotating brush 11, and the lower position Then, it is dropped and collected in a collecting and discharging device 8 such as a running water trough installed in the upper part of the screen 7 and discharged outside the water channel. Also, this cleaning nozzle 4
The string-like dust that has not been peeled off around the screen or is entangled with the screen is washed by the cleaning water pressure from the cleaning nozzle 9 that is sprayed at an angle to the screen in the direction opposite to the screen traveling direction. It receives a force in the direction of separation from the screen surface, comes off the screen surface, and falls into the collecting and discharging device 8. In this way, the washing water sprayed from one side of the screen passes through the screen,
It is reflected by the reflection plate and comes to pass through the screen again, and the same washing water passes twice from the upper and lower surfaces of the screen. As a result, the dust adhering to the screen and the string-like dust that has been wound or entangled can be loosened with a small amount of cleaning water, and the dust can be reliably removed.

In the embodiment shown in FIG. 1, the collecting / discharging device 8 has one or two U-shaped or V-shaped troughs 81 arranged in the width direction of the screen, and one end of the inclined running water trough 81 is connected to the collecting trough. Then, the screen residue that has fallen and collected in the trough 81 is further conveyed and discharged to the outside of the water channel through the collecting trough 82.

[0015]

In the filter body moving type dust remover of the present invention, a required endless belt type screen is stretched in parallel with a water channel so as to be submerged below the water surface of the water channel, and the belt type screen is rotationally driven. In addition, in the filter body moving type dust remover that is designed to remove dust caught on the screen or caught on the screen, the screen is placed on the upper surface side and the lower surface side of the screen at a position above the water surface of the screen. Since a cleaning nozzle that sprays cleaning water toward the surface is provided, and a reflecting plate that reflects the cleaning water sprayed from one side of the screen to the opposite side of the screen after the cleaning water has passed through the screen is provided on the screen. The string-like dust that is wrapped around or entangled is also attached because the cleaning water sprayed from the nozzle is reflected so that it passes through the screen twice. Not easily separable dust such wound not only dust also can reliably separated and removed with less wash water, without clogging the screen first in operation for a long time, there is an advantage that allows the removal of the screen residue smoothly.

[Brief description of drawings]

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

FIG. 2 is a side view of the same.

FIG. 3 is an explanatory diagram of a different embodiment of the present invention.

FIG. 4 is an explanatory diagram for removing dust entangled with a cleaning nozzle and a rotating brush.

[Explanation of symbols]

 1 Water Channel 2 Dust Remover 4 Cleaning Nozzle 5,6 Roller or Drum 7 Belt-type Screen 9 Cleaning Nozzle 10 Reflector 11 Rotating Brush

─────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] May 7, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] Full text

[Correction method] Change

[Correction content]

[Document name] Statement

[Title of the Invention] Filter body moving type dust remover

[Claims]

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention ensures that dust, which is attached to or entangled with an endless belt type screen during sewage treatment, and other fine dust such as films and strings, can be reliably removed from the screen with a small amount of cleaning water. The present invention relates to a movable filter body type dust remover.

[0002]

2. Description of the Related Art Rainwater that falls in urban areas and domestic wastewater is
It is collected at a sewage treatment plant through an underdrain / sewer, etc., and after removing the dust contained in the sewage here, this sewage is directly or pumped up and sent to the next treatment tank for treatment. Anything that exceeds it is discharged to the river as it is. A bar screen or the like is generally used to remove fine dust in the sewage.

[0003]

However, when a fixed bar screen is used for removing fine dust as in the prior art, the effective passage area of the screen is reduced by reducing the mesh width of the screen, which is common in the case of rainfall. If a large amount of sewage is poured into the wastewater for treatment, the loss will be large, and film and string-like dust is more likely to come off than the screen mesh, and in the case of a mesh screen, dust is easily entangled and reliable removal is difficult. Met. Also, with a mesh screen or a screen using punching metal, the leaves and the like in the dust can be easily removed, but the long and slender string-like substance is entangled or entangled in the eyes of the mesh screen, which is difficult to remove, and clogging occurs. However, there is a drawback that the water flow capacity of the screen is deteriorated.

An object of the present invention is to reliably remove even film or string-like dust that is wound around the screen or entangled with a small amount of cleaning water to remove dust.

[0005]

SUMMARY OF THE INVENTION The present invention has been made to achieve the above object, in which a required endless belt type screen is arranged in a stretched manner so as to be parallel to a water channel and to be submerged below the water surface of the water channel. At the same time, in the filter body moving type dust remover in which the belt type screen is rotationally driven and the dust trapped on the screen or removed by the screen is removed, the screen is located above the water surface of the belt type screen. A cleaning nozzle that sprays cleaning water toward the screen surface is provided on either or both of the upper surface side and the lower surface side of the screen, and after the cleaning water sprayed from one surface side of the screen passes through the screen, The gist of the present invention is to provide a reflection plate for reflecting the light on the opposite side.

[0006]

[Operation] An endless belt-shaped screen of rotating mesh or punching metal is installed in the water channel,
By passing the sewage through the screen, the dust in the sewage is filtered and captured, and the screen dust is scraped above the water surface by the movement of the screen. Then, a cleaning nozzle for spraying cleaning water to remove dust adhering to the screen at a position above the water surface and a reflecting plate are arranged facing each other on both upper and lower sides of the screen so that they pass through the screen. The washed water is reflected by the reflection plate and again passes through the screen in the opposite direction. As a result, the cleaning water sprayed from the nozzle is
Because it passes the screen twice in different directions,
It is possible to reduce the amount of washing water and remove the dust and the like adhering to the screen.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on the illustrated embodiments. In the figure, reference numeral 1 designates a water channel, and a filter body moving type dust remover 2 which mainly comprises a belt type screen having a mesh of a required mesh or an endless punching metal is installed. This filter body moving type dust remover 2 has a body frame 3 installed on a water channel.
And rotatably supports a roller or wheel 5 driven by a drive device and a plurality of driven rollers or wheels 6, 6, and these rollers or wheels 5, 6, 6
The endless belt type screen 7 is looped or folded in two as shown in the drawing, and the lower part of the two folded belt type screen 7 reaches almost the bottom of the water channel 1. It is arranged in a stretched manner, and a screen residue collecting / discharging device 8 is provided in the screen 7.

The belt type screen 7 has a required width according to the ability of the screen and a length (total length) according to the depth of the water channel, etc., and a mesh having a mesh width suitable for the screen is provided over almost the entire length. It has a mesh or holes of the required diameter and a punching metal with a large number of holes perforated at the hole pitch, and this is joined endlessly. The screen thickness is the position of the screen where the wheels or rollers 5 and 6 are located. Set it appropriately so that it can be bent smoothly.

Further, cleaning nozzles 4 and 9 are provided above the water surface of the belt-type screen 7 for removing the screen residue such as tree leaves and string-like dust adhering to and scraped from the screen from the screen surface. Prepare As shown in the figure, the cleaning nozzle 4 is arranged on the upper surface side of the belt type screen 7, that is, on the upper surface side of the back surface of the screen so that the cleaning water is sprayed almost at a right angle to the screen surface, whereby it is attached to the screen. The leaves and the like are peeled off and dropped into the screen residue collecting and discharging device 8.

The other cleaning nozzle 9 is arranged on the lower surface side of the belt type screen 7, that is, on the lower surface side of the screen, and so that the cleaning water is sprayed at a predetermined angle with respect to the screen surface. This cleaning nozzle 9
Is designed to spray cleaning water from the upstream side to the downstream side in the direction of movement of the belt type screen, and at a predetermined angle, so that the string-like dust attached or wrapped around the screen is opposite to the direction of movement of the screen. In this direction, the cleaning water pressure acts so as to be separated from the screen, so that the dust around the screen can be surely separated.

Further, the cleaning water sprayed onto the upper and lower surfaces of the screen, or one of the screens, and the cleaning water that has passed through the screen is reflected again on the screen surface, and the reflecting plate 10 is made to pass through the cleaning water. The installation angle is set equal to θ. The reflecting plate 10 faces the cleaning nozzles 4 and 9 with the screen sandwiched therebetween, but in addition to the flat plate-shaped one, it may be formed in a concave shape to have a water collecting property. Further, the fan-shaped jet angle of the nozzle for jetting the washing water can be made small, and the number of nozzles can be increased to reduce the spread after the washing water is reflected by the reflecting plate, and the washing water can be effectively utilized.

Instead of the cleaning nozzle 4, a rotating brush 11 can be provided on the upper surface side of the screen. In this case, it is desirable that the brush comes into contact with the upper surface of the screen at the position where the lower surface of the screen is in contact with the cleaning water from the cleaning nozzle 9.

Therefore, when sewage is introduced from the inner side surface of the belt type screen 7 arranged to be driven to rotate in the water channel 1, the screen residue in the sewage water is captured on the inner side surface of the screen, and then the screen is removed. By turning, the captured screen residue is scraped above the waterway. The dust adhering to the screen surface is separated from the screen surface by spraying cleaning water at a right angle from the upper surface of the screen with a cleaning nozzle, or by the rotating brush 11, and the lower position Then, it is dropped and collected in a collecting and discharging device 8 such as a running water trough installed in the upper part of the screen 7 and discharged outside the water channel. Also, this cleaning nozzle 4
The string-like dust that has not been peeled off around the screen or is entangled with the screen is washed by the cleaning water pressure from the cleaning nozzle 9 that is sprayed at an angle to the screen in the direction opposite to the screen traveling direction. It receives a force in the direction of separation from the screen surface, comes off the screen surface, and falls into the collecting and discharging device 8. In this way, the washing water sprayed from one side of the screen passes through the screen,
It is reflected by the reflection plate and comes to pass through the screen again, and the same washing water passes twice from the upper and lower surfaces of the screen. As a result, the dust adhering to the screen and the string-like dust that has been wound or entangled can be loosened with a small amount of cleaning water, and the dust can be reliably removed.

In the embodiment shown in FIG. 1, the collecting / discharging device 8 has one or two U-shaped or V-shaped troughs 81 arranged in the width direction of the screen, and one end of the inclined running water trough 81 is connected to the collecting trough. Then, the screen residue that has fallen and collected in the trough 81 is further conveyed and discharged to the outside of the water channel through the collecting trough 82.

[0015]

In the filter body moving type dust remover of the present invention, a required endless belt type screen is stretched in parallel with a water channel so as to be submerged below the water surface of the water channel, and the belt type screen is rotationally driven. In addition, in the filter body moving type dust remover that is designed to remove dust caught on the screen or caught on the screen, the screen is placed on the upper surface side and the lower surface side of the screen at a position above the water surface of the screen. Since a cleaning nozzle that sprays cleaning water toward the surface is provided, and a reflecting plate that reflects the cleaning water sprayed from one side of the screen to the opposite side of the screen after the cleaning water has passed through the screen is provided on the screen. The string-like dust that is wrapped around or entangled is also attached because the cleaning water sprayed from the nozzle is reflected so that it passes through the screen twice. Not easily separable dust such wound not only dust also can reliably separated and removed with less wash water, without clogging the screen first in operation for a long time, there is an advantage that allows the removal of the screen residue smoothly.

[Brief description of drawings]

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

FIG. 2 is a side view of the same.

FIG. 3 is an explanatory diagram of a different embodiment of the present invention.

FIG. 4 is an explanatory diagram for removing dust entangled with a cleaning nozzle and a rotating brush.

[Explanation of Codes] 1 Water channel 2 Dust remover 4 Cleaning nozzle 5, 6 Roller or drum 7 Belt type screen 9 Cleaning nozzle 10 Reflector 11 Rotating brush

[Procedure Amendment 2]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 3

[Correction method] Change

[Correction content]

[Figure 3]

Claims (1)

[Claims] 1. A required endless belt type screen is stretched in parallel with a water channel so as to be submerged below the water surface of the water channel, and the belt type screen is rotationally driven and is captured by the screen or the screen. In a filter body moving type dust remover designed to remove dust caught on the screen, one of the upper surface side and the lower surface side of the screen at the position above the water surface of the belt type screen is directed toward this screen surface. And a cleaning nozzle for spraying cleaning water, and a reflecting plate for reflecting the cleaning water sprayed from one side of the screen on the opposite side of the screen after passing through the screen. Mobile dust remover.