JPH08177029A - Operating method of screen movement type dust collector - Google Patents

Abstract

PURPOSE: To reduce the power consumption and water and remove foreign elements efficiently and effectively by detecting the changes of the water-level difference of the upstream and downstream of a dust collector in a water channel and selectively using the operation control of an endless screen and a nozzle for removing remnants in the dust collector and a rotary brush. CONSTITUTION: Water level recorders 10 are fitted on the upstream side and downstream side of a dust collector 2. When detected water level difference reaches the operation water level of a specific low water level, the change of the water-level difference is detected by the water level recorders 10 while regarding as a rise to a specific operation water-level value, and an endless screen 7 is operated at a specific rotational speed while injecting wash water towards the screen from a second nozzle 11 mounted at a final place. Consequently, remnants flowing into a water channel are captured by the screen, and scraped up successively. The remnants are peeled and removed by the pressure of wash water injected from the second nozzle 11 and the rotation of the rotary brush 13 at that time, and discharged by a collecting discharging device 9. Injection and revolution are stopped. Accordingly, the remnants can be filtered and removed effectively and efficiently while reducing the power consumption and water.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an endless screen type dust remover that circulates and moves in a water channel during sewage treatment, and changes the water level in the dust remover that changes following the change in the amount of residue contained in inflowing wastewater. Screen-moving dust remover that detects and controls the operation of the dust remover and selectively uses the nozzle and rotary brush for removing dust in the dust remover to effectively scrub and remove the dust while saving electricity and water. It is related to the driving method of.

[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, where dust and the like contained in the sewage is removed, this sewage can be treated either directly or by pumping it up to a treatment tank in the next process, or treating it with rainwater. Then, it is released to the river next. A bar screen or the like is generally used to remove fine dust in the sewage. However, with this bar screen, the effective passage area of the screen will decrease if the screen width is reduced,
Generally, when a large amount of waste water is treated by flowing it, such as when it is raining, the loss is large, and film-like and string-like dust is more likely to come off than the screen mesh, making it difficult to remove it reliably. In addition, in order to improve the drawbacks of this bar screen, an endless screen in which a unit such as a net is placed between two endless chains located on both sides of the bar screen is installed adjacent to the end of the screen in parallel with the water channel and below the water surface of the water channel. The endless screen is rotatably driven so as to be submerged, and the contaminants captured by the screen are separated and removed by spraying washing water and a rotating brush.

[0003]

However, the dust removal capacity of the screen moving type dust remover that rotates the endless screen is proportional to the rotational drive speed of the filter body. However, there is a limit to the high rotational drive speed of the filter due to its structure. Therefore, the speed is set as the maximum designed waste concentration based on the maximum value of the amount of waste that flows out to the treatment plant, and it is set to operate continuously or even for a predetermined time when a certain water level is reached.
However, the amount of garbage that flows into the treatment plant is usually very small, and it often comes in suddenly, such as during rainfall. Therefore, if the timer is operated intermittently or continuously on a regular basis as in the conventional case, energy is wasted by operating the filter body even if there is no inflowing dust, and it is always jetted from the nozzle for removing scraped residue. There is a drawback that the amount of washing water used is large.

The present invention selectively combines the control of the number of nozzles for detecting the preset water level, operating the dust remover at a set speed, and injecting cleaning water according to the change of the water level, and the rotation of the brush. The purpose is to save water, save electricity, and efficiently remove impurities.

[0005]

The present invention has been made to achieve the above object, and in an operating method of a dust remover in which an endless screen used for sewage treatment is circulated and moved in a waterway, inflowing wastewater is treated. Detects the change in the water level difference between the upstream and downstream of the dust remover in the water channel, which changes following the change in the amount of residue contained, and selects the nozzles and rotating brush for operation control of the endless screen and residue removal in the dust remover. The purpose is to scoop up and efficiently remove the residue while saving electricity and saving electricity.

[0006]

Operation: A screen unit using a filter medium is formed between two endless chains so as to be adjacent to each other, and an endless screen is stretched in parallel with the water channel so as to be submerged below the water surface of the water channel to remove dust in the water channel. The water level difference between the upstream and downstream of the machine is driven to rotate the endless screen by detecting the predetermined water level difference value. For scraping, and further for removing the residue (contaminant) provided on the dust remover while spraying the cleaning water from the second nozzle provided at the final scraping position of the screen so that the cleaning water is sprayed toward the screen. After the rotary brush is also rotated to remove and remove the fixed brush, the nozzle is stopped and the rotational drive of the endless screen is stopped after a predetermined time. However, even if the dust is removed in this way, the amount of residue is large and if the residue is not completely removed, the eyes of the screen will gradually become clogged and the water level difference in the water channel will further expand. When this rise in water level difference is detected, cleaning water is sprayed from the first nozzle next to the second nozzle, and the rotary brush is also rotated to scrape and remove residue, and after a certain period of time, the brush and nozzle, The endless screen is also stopped.
In this way, the amount of inflow is detected by detecting the water level difference, and the operation can be performed in accordance with the detection, so that water can be saved and the inflow can be removed efficiently.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A method of operating a screen moving type dust remover of the present invention will be described below with reference to the illustrated embodiments. FIG. 4 is a vertical sectional view showing an embodiment of the screen moving type dust remover, and FIG. 5 is a plan view thereof. In FIGS. 4 and 5, reference numeral 1 denotes a water channel, which is an endless chain in which punching metal having a required hole diameter and number of holes or a net having a required spacing is used as one screen unit, which are adjacently arranged and arranged on both sides of each unit. A screen moving type dust remover 2 mainly including an endless screen which is locked so as to be installed between is installed.

This screen moving type dust remover 2 showing one embodiment rotatably supports a sprocket wheel 5 and a driven sprocket wheel 6 driven by a drive device 4 on a body frame 3 installed on a water channel. Along with these wheels 5, 6, and two end rails of U-shape for guiding both sides of the endless screen in the water channel, the endless screen 7 is folded in two as shown in the drawing.
Wrapped in a letter shape or multi-stage fold type, and folded in two W
In order to remove the scraped residue scraped up in the screen 7, the lower part of the endless screen 7 in the shape of a letter or a multi-stage folding type is stretched so as to reach almost the bottom of the water channel 1. The first nozzle 11, the second nozzle 12, and the rotary brush 13 for removal are provided. And this first,
High-pressure washing water is sprayed toward the screen surface of the second nozzle, and the rotary brush is rotated by receiving an operation signal. The residue removed by the nozzle and the rotating brush is discharged by the collecting and discharging device 9 disposed below the nozzle and the rotating brush.

This endless screen 7 has a required width according to the ability of the screen and a length (overall length) according to the depth of the water channel, etc., and a flat plate having a required diameter and a hole having a required diameter over the entire length. Punching metal with a large number of holes perforated at the required pitch (for example, the porosity of punching metal is 50
Approximately about 80% enables efficient dust removal) to be used as a screen unit, and the screen unit is attached between two endless chains whose longitudinal side edges are adjacent to each other and whose both ends are parallel to each other. Composed of
Align the connecting parts of each screen unit with the connecting parts of the chains on both sides, and when the chain link bends along the spcket wheel or guide rail, adjust the screen unit's alignment according to the link bend. The connecting portions are also configured so that they can be smoothly bent.

The screen-moving type dust remover thus constructed is operated as follows. The dust remover is normally stopped when the water level difference between the upper and lower drainage basins of the dust remover is equal to or lower than a predetermined low water level, which is an operating water level. Then, when the water flows into the water channel and the residue is captured by the screen and the screen is clogged and the water level on the upstream side of the dust remover rises, the water level meter installed on the upstream side and downstream side of the dust remover At 10, the water level difference is detected. To detect this difference in water level, is it possible to measure the water level change in a waterway with a single water gauge?
Alternatively, the water level difference on both the upstream side and the downstream side of the dust remover is used for detection.

When the detected water level difference reaches a predetermined low operating water level, the water level gauge 10 detects that the water level difference in the waterway has risen to a predetermined operating water level value as shown in FIG. When the endless screen is operated at a predetermined rotation speed while spraying washing water toward the screen from the second nozzle provided at the final position pulled up from the water channel, the endless screen flows into the water channel and the residue is captured by the screen and sequentially scraped. Fried. At this time, the residue of the cleaning water sprayed from the second nozzle 11 and the rotation of the rotary brush 13 that is picked up and scraped up by the screen is peeled off and discharged by the collecting and discharging device 9. In this way, after a certain period of time has passed and the residue in the water channel has been roughly removed, the injection of washing water from the second nozzle 11 and the rotation of the brush are stopped, and the rotation drive of the endless screen is also stopped, and the residue remains. Complete the removal of.

When the operating water level does not drop and the water level difference further rises even when the dust remover is operated in this way, when the water level difference value is detected, the operation of the dust remover is continued, and not only the second nozzle 11 Cleaning water is also sprayed from the first nozzle 12, and the rotary brush 13 is also rotated to remove the residue that has been captured and scraped by the screen by the first and second both nozzles 11 and 12 and the rotary brush 13. Then, it is discharged by the collecting and discharging device 9. In this way, after a certain period of time has passed and the residue in the water channel has been removed and the water level has dropped, the second and first nozzles 1
2 stops the injection of washing water, and the rotating brush 1
The rotation of No. 4 is also stopped and the rotation drive of the endless screen is stopped, and the removal of the residue is completed.

Even when the dust remover is operated as described above, when the amount of inflow of the residue is large and the water level does not decrease, and the maximum water level HH that is set further rises and the set maximum water level HH is detected, the dust remover is driven and the first nozzle 12 is operated. The cleaning water is simultaneously sprayed from both nozzles of the second nozzle 11 and the second nozzle 11, and the rotary brush 13 is also rotated. By spraying the washing water from the first and second nozzles 11 and 12 and rotating the rotary brush, the screen residue captured on the screen is forcibly peeled off and discharged by the collecting and discharging device 9.
In this way, after a certain period of time, the residue in the waterway is removed,
After the water level difference has fallen to the set water level value, the injection of cleaning water from the second and first nozzles 12 and the rotating brush are stopped, the rotation drive of the endless screen is also stopped, and the removal of residue is completed. Is.

[0014]

According to the operating method of the screen moving type dust remover of the present invention, the change in the water level difference between the upstream and downstream of the dust remover in the water channel that changes following the change in the amount of residue contained in the inflowing wastewater is detected. The operation control of the endless screen, the nozzle for removing residue in the dust remover, and the rotating brush are selectively used to squeeze up while efficiently conserving power to save residue, so that residue is efficiently filtered and removed. It is possible to effectively and efficiently filter out the residue. In addition, if the water level difference value further increases due to the operation of the dust remover, the endless screen is rotated while jetting the washing water from the first nozzle and the second nozzle provided so as to jet the washing water toward the screen. Remove the residue captured by the screen, and detect the maximum water level when the water level rises. Rotate the first and second nozzles and the separation brush to scrape and remove the residue. Therefore, there is an advantage that the dust removal corresponding to the change of the inflow water amount can be efficiently and surely performed.

[Brief description of drawings]

FIG. 1 is a block flow diagram during normal operation in an operating method of a screen moving type dust remover of the present invention.

FIG. 2 is a block flow diagram at the time of operation of the screen moving type dust remover when the inflowing residue amount is medium.

FIG. 3 is a block flow diagram during operation of the screen moving type dust remover when the amount of inflowing residue is large.

FIG. 4 is a vertical sectional view showing an example of a screen moving type dust remover.

FIG. 5 is a plan view of the screen portion.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Water channel 2 Dust remover 7 Endless screen 9 Screen residue collecting and discharging device 10 Water level meter 11 Second nozzle 12 First nozzle 13 Rotating brush

Claims (4)

[Claims] 1. A method for operating a dust remover in which an endless screen used for sewage treatment is circulated and moved in a waterway,
Detects the change in the water level difference between the upstream and downstream of the dust remover in the water channel, which changes following the change in the amount of residue contained in the inflowing wastewater, and controls the operation of the endless screen and the nozzle and rotation for removing the residue in the dust remover. A method for operating a screen-moving type dust remover, which comprises selectively using a brush to scavenge while saving electricity to efficiently remove residue. 2. A method of operating a dust remover for circulatingly moving an endless screen used for sewage treatment in a waterway,
When the change in the water level difference between the upstream and downstream of the dust remover in the water channel that changes following the change in the amount of residue contained in the inflowing sewage is detected to rise to the predetermined operating low water level, the final scratching position on the screen is detected. The endless screen is operated at a predetermined rotation speed while spraying the cleaning water toward the screen from the second nozzle provided, and the screen is caught and fried on the screen to remove the residue and remove the water level difference, and then for a certain period of time. The method of operating a screen moving type dust remover according to claim 1, wherein the rotary brush is rotated to stop the nozzle and the brush, and the rotary drive of the endless screen is also stopped. 3. A method of operating a dust remover in which an endless screen used for sewage treatment is circulated and moved in a waterway,
When it is detected that the change in the water level difference between the upstream and downstream of the dust remover in the water channel, which changes in accordance with the change in the amount of residue contained in the inflowing sewage, has risen to the predetermined operating high water level, the final scraped position on the screen is displayed. While the cleaning water is jetted toward the screen from the second nozzle provided, the endless screen is operated at a predetermined rotation speed, and further the cleaning water is directed toward the screen from the first nozzle provided at the first-stage lifting position. After spraying and catching on the screen, scraping off the residue and removing the water level difference, the rotary brush is rotated for a certain period of time, and then the first nozzle, then the second nozzle, and also the rotary brush are stopped, and the endless shape is achieved. The method of operating a screen moving type dust remover according to claim 1, wherein the rotational driving of the screen is also stopped. 4. A method of operating a dust remover for circulatingly moving an endless screen used for sewage treatment in a waterway,
When it is detected that the change in the water level difference between the upstream and downstream of the dust remover in the water channel that changes following the change in the amount of residue contained in the inflowing sewage has risen to the predetermined operating maximum water level, the final scraped position on the screen is displayed. The endless screen is operated at a predetermined rotation speed while spraying the cleaning water toward the screen from the provided second nozzle, and the first nozzle provided at the first-stage frying position while detecting the water level difference. While spraying the cleaning water toward the screen, the rotary brush is also rotated to catch and scoop up the screen to remove the residue and eliminate the water level difference, and then the first nozzle, then the second nozzle and the rotary brush are also stopped. The method of operating a screen-moving type dust remover according to claim 1, wherein the endless screen is also stopped from rotating.