JPH034687B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" This invention relates to an automatic dust removal device that can be suitably used for water treatment in rivers, settling ponds, and the like.

``Conventional technology'' Conventionally, dust removal equipment used for water treatment in rivers, sedimentation ponds, etc. has a screen installed in a water gate that allows only water to pass through, and the dust captured by the screen is moved up and down on the screen surface. Some methods involve scraping up and discharging waste with a rake, while others install a rotating screen at the water gate and rotate the screen to scrape the dust with a scraper or the like at a different location and discharge it. .

``Problems to be Solved by the Invention'' However, all of these methods have the disadvantage of poor filtering efficiency for fine dust because they use coarse materials such as bar screens.

Therefore, it is possible to adopt a filtration method using a filter cloth, but this filtration method requires the work of scraping off the dust trapped on the filter cloth to regenerate the filter cloth. Conventionally, this required a step of once stopping water treatment, scraping off the dust with a scraper, and backwashing with a water flow in the opposite direction.

This invention aims to eliminate the above-mentioned drawbacks, and provides an automatic dust removal device that can regenerate the filter cloth without stopping water treatment and can perform water treatment continuously for a long time. This is what I am trying to do.

"Means for Solving the Problems" As shown in FIGS. 1 and 2 of the embodiment drawings, the present invention provides a hollow rotating chamber 1 in which a raw water inlet 9 is formed on the upper surface and is rotationally driven by a prime mover. have. At a suitable position on the circumferential direction of the side wall 2 of this rotating chamber 1,
A plurality of endless belt-shaped filter cloths 3 are provided, which are stretched between pulleys 4 provided in the length direction of the side wall 2 and run around the inner and outer peripheries of the side wall 2. A plurality of blades 5 are diagonally held on the filter cloth 3 at predetermined intervals, and a rotating water flow generated relatively between the rotation chamber 1 and the input raw water by rotation is caused by the rotation of the plurality of blades. The filter cloth 3 is automatically rotated in the length direction of the side wall 2 when the filter cloth 3 hits the blade 5 of the filter.

On the other hand, the filtered liquid that has been filtered from between the filter cloth 3 in the rotation chamber 1 and the inner periphery of the side wall 2 flows out from the discharge port 6 provided in the upper pulley 4.

Further, the filter cloth 3 is scraped off by a dust removal mechanism 7 on the outer periphery of the rotation chamber 1 during rotation, and the residue scraped off by the dust removal mechanism 7 is discharged to the outside of the machine through a drain 8.

"Function" In the device configured in this way, when raw water is introduced into the rotation chamber 1 from the input port 9, the input direction and the rotation direction of the rotation chamber 1 act relative to each other, so that the rotation chamber 1 A water flow is generated that rotates in the circumferential direction. Therefore, this water stream hits a plurality of blades 5 diagonally held at predetermined intervals on the filter cloth 3, and the filter cloth 3 is automatically rotated in the longitudinal direction of the side wall 2.

Further, while the filter cloth 3 is rotating, residues are scraped off by a dust removal mechanism 7 outside the rotating chamber 1, and the residue scraped off by the dust removal mechanism 7 is discharged to the outside of the machine through a drain 8.

"Example" Examples will be described below based on the drawings.

In FIGS. 1 and 2, reference numeral 1 designates a hollow rotating chamber 1 which has a raw water inlet 9 formed on its upper surface and is rotationally driven by a prime mover 10. As shown in FIG. This rotating chamber 1 is rotatably held by a rotating shaft 12 in a tank 11 that houses the entire device.
0, it is rotationally driven. Inside the rotation chamber 1, on the outer periphery of the rotation shaft 12, a raw water input pipe 13 whose upper end is open in the shape of a funnel is disposed with the upper end supported by the tank 11. Reference numeral 14 denotes a funnel-shaped discharge plate provided at the lower end of the input pipe 13 with a discharge interval, and discharges raw water flowing in from the input pipe 13 upward toward the inner periphery of the rotating chamber 1.
Note that the raw water input port 9 opens toward the open upper end of the input pipe 13.

A plurality of pairs of pulleys 4 are provided in the circumferential direction of the side wall 2 of the rotation chamber 1 at predetermined intervals in the length direction of the side wall 2, and an endless belt-shaped filter cloth 3 is stretched between each pulley 4. ing. The filter cloth 3 is held on the pulley 4 so as to freely circulate around the inner and outer peripheries of the side wall 2 in the length direction of the side wall 2.

A plurality of blades 5 made of, for example, plastic are obliquely held on the filter cloth 3 at predetermined intervals. The holding method may be any suitable means such as adhesion or eyelets. By the rotation of the rotating chamber 1, a rotating water flow is relatively generated between the rotating chamber 1 and the input raw water. This rotating water flow hits the plurality of blades 5 on the filter cloth 3 rotating together with the rotation chamber 1, and automatically rotates the filter cloth 3 in the length direction of the side wall 2.

On the other hand, the filtered liquid that has been filtered from between the filter cloth 3 in the rotation chamber 1 and the inner periphery of the side wall 2 is protruded from the side end of the upper pulley 4, and is rotated together with the rotation chamber 1. From the pipe-shaped discharge port 6, the outflow pipe 13
It flows out through the process. This pipe-shaped discharge port 6
is a ring-shaped outflow pipe 13 held above the rotating chamber 1.
is inserted into the open groove 14 formed on the inner periphery of the side surface of the
The filtered liquid is discharged into the outflow pipe 13.

Further, while the filter cloth 3 is rotating, residues are scraped off at the outer periphery of the rotating chamber 1 by a dust removal mechanism 7, and the residues scraped off by this dust removal mechanism 7 are removed from the machine by a drain 8 piped at the bottom of the tank 11. is discharged.

Although various means are conceivable for the dust removal mechanism 7, the one shown is a water jet nozzle 15 that jets jet water from above the tank 11 toward the side wall of the rotating chamber 1. Of course, a plurality of water jet nozzles 15 can be provided, but it is not necessary to provide a large number of them as long as the jet water jet is ejected in a constant length along the length direction of the filter cloth 3.

Next, FIGS. 3 to 7 show details of a plurality of blades 5 fixedly mounted on the filter cloth 3 at predetermined intervals. The filter cloth 3 has horizontal bars 16 fixed at predetermined intervals.
It is connected to the roller chain 17 via. Note that 18 is a guide bar for holding the roller chain 17 at a predetermined interval. Then, the blade 5 has its base 20 placed on the filter cloth 3 on the horizontal bar 16.
It is fixed with screws at a predetermined angle with respect to the length direction. Since the roller chain 17 is engaged with a pulley 4 consisting of a sprocket 21 and is rotatable, the rotating water flow hits the plurality of blades 5 on the filter cloth 3 and applies a driving force to the filter cloth 3 in the direction of the arrow 22. When applied, the filter cloth 3 is automatically rotated in the length direction of the side wall 2.

"Effects of the Invention" As explained above, this invention can of course efficiently filter fine dust, and since it uses a centrifugal filtration method, water treatment can be carried out efficiently with a small-sized device. be able to.

In addition, the conventional process of stopping water treatment, scraping off the dust with a scraper, and backwashing with water flow in the opposite direction is no longer necessary, making it possible to regenerate the filter cloth without stopping water treatment. can. Therefore, it is possible to provide an automatic dust removal device that continuously processes water for a long period of time.

[Brief explanation of the drawing]

The drawings show an embodiment of the automatic dust removal device of the present invention, in which Fig. 1 is a schematic vertical cross-sectional view thereof, Fig. 2 is a schematic cross-sectional view thereof, and Fig. 3 is a device fixed on a filter cloth at predetermined intervals. A side view showing details of the blade, Figure 4 is a plan view of the attachment part of the blade, Figure 5 is an enlarged cross-sectional view thereof,
FIG. 6 is an enlarged vertical sectional view thereof, and FIG. 7 is an enlarged plan view of the blade with the blades attached. 1...Rotating chamber, 2...Side wall, 3...Filter cloth, 4...
...Pulley, 5...Multiple blades, 6...Discharge port, 7
...dust removal mechanism, 8...drain, 9...raw water inlet.

Claims (1)

[Claims] 1 A hollow rotating chamber 1 having a raw water inlet 9 and rotationally driven by a prime mover, and a pulley 4 provided in the longitudinal direction of the side wall 2 at appropriate positions around the circumferential direction of the side wall 2 of the rotating chamber 1. and a plurality of endless belt-shaped filter cloths 3 which are arranged around the inner and outer peripheries of the side wall 2, and a plurality of blades 5 held diagonally on the filter cloths 3;
A discharge port 6 for discharging the filtered liquid from the inner periphery of the filter cloth 3 and the side wall 2 in the rotation chamber 1 to the outside, and a dust removal mechanism 7 for scraping off residue from the filter cloth 3 on the outer periphery of the rotation chamber 1. and a drain 8 for discharging the residue scraped off by the dust removal mechanism 7.