JPS6141242B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION When the material of an automatic cleaning filtration device becomes clogged and the excess efficiency decreases, the material is unclogged with backwash water and the excess efficiency is normalized. This invention relates to improvements to backwashing equipment.

Conventionally, there are two methods for automatic cleaning and filtering equipment.One method is to use a cylindrical element as a means of removing dust attached to the inner surface of the cylindrical element. Method of scraping the internal surface with a scraping member, and Part 2
is inside the fixed cylindrical element (primary side)
This method uses the raw solution and the material to pass through to the outside (secondary side), and uses the pressure of the secondary side liquid to remove dust that adheres to the inner surface of the material and the inside of the material.
There is a method in which the material is discharged to the atmosphere through a backwash nozzle having a backwash hole in the form of a vertical slit that rotates inside the element and slides close to the inner surface of the material on the primary side.

The former scraping method has the disadvantage that depending on the type of dust, the scraping operation may actually clog the grain, and the secondary pressure backwashing method If the filtrate is discharged directly to the atmosphere (equal to the downstream side), there is a disadvantage that the secondary side pressure will be close to atmospheric pressure and the backwashing effect will be lost.

In addition, if the concentration of dust in the stock solution is high,
The material gets clogged quickly, and the secondary side pressure suddenly drops due to the clogging, causing problems such as backwashing becoming impossible.

The present invention has been proposed for the purpose of providing a backwashing device that eliminates the drawbacks and adverse effects of the above-mentioned conventional methods and allows the automatic cleaning and filtering device to operate efficiently at all times.

Its structure is that the upper end opening is sealed with a lid, has a bottom plate, and has a raw solution inlet and a superhydrant outlet at appropriate locations on the surrounding wall.
A vertically elongated cylindrical container is fixed vertically, and a container is arranged concentrically within the container so as to be rotatable forward and backward, and a sealing plate is fixed to the top, and the containers are arranged at equal intervals along the circumferential direction.
An annular element frame in which a number of slag storage chambers each containing an element material are connected in an annular manner between adjacent partition frames of element partition frames arranged radially in the radial direction, and a center plate of the bottom plate of the container. The lower end opening is fixedly fixed to the element, and the upper end opening is connected to a backwash nozzle center pipe which is fluid-tightly and mutually rotatably abutted to the center of the lower surface of the sealing plate, and inside the element,
The backwash nozzle is located toward the center of the element inspection port and has a slit hole in contact with the inside of the element material.The backwash nozzle has a funnel-shaped cross section and is attached to the element inspection port. The distance between both sides of the backwash water discharge guide plate is equal to the element partition frame of the slag storage chamber,
In addition, a backwash water guide/discharge plate is arranged so as to be in contact with the partition frame, the upper part is sealed, and the lower part is open, and on the outside of both side plates of the backwash water discharge guide plate, there are slag storage chambers on both left and right sides. and a cutter having an L-shaped vertical cross section extending outwardly and rotatably penetrating the central part of the lid of the cylindrical container in a fluid-tight manner,
A drive source capable of forward and reverse rotation is connected to the upper end, and
It is characterized by having an element rotation shaft whose lower end is connected to the annular element frame E via an element rotation thrust radial bearing provided in the center of the sealing plate of the annular element frame E.

Hereinafter, according to the embodiments shown in FIGS. 1 to 4,
The present invention will be specifically explained.

In FIGS. 1 and 2, reference numeral 1 denotes a vertically elongated cylindrical container with a cylindrical cross-sectional shape, and the top of the container 1 is sealed with a lid 2. 1b is a bottom plate attached to the bottom of the container 1, and the container 1 is vertically fixed on a base (not shown) via the bottom plate 1b.
Reference numeral 11 denotes an inlet for undiluted water such as sewage, which is installed at a suitable position on the peripheral wall of the container 1, 12 is a water outlet, which is installed at a suitable position at the lower part of the peripheral wall of the container 1, and 4 is a cylindrical element material, which is usually a third The slits are formed using a wedge wire with an isosceles triangular cross section as shown in the figure. (The cross section of this wedge wire may be round, semi-circular or trapezoidal.) The slag storage chamber 4 is evenly partitioned around its outer circumference by element partition frames 4a of a constant width radially in the axial direction of the cylinder.
b, the upper part of which is sealed with a sealing plate 4c, and the lower part thereof is open and communicates with the overwater outlet 12. Further, the lower end of the element rotation shaft 10 is fixed to the center of the upper part of the sealing plate 4c, and the element rotation thrust radial bearing 13 is attached to the center of the lower part of the sealing plate. Further, the upper part of the element rotating shaft 10 extends upward through the lid 2 through the gland seal 14, and a driving source (not shown) capable of forward and reverse rotation is connected to the extending end thereof.

A large number of the slag storage chambers 4b are arranged in the circumferential direction to form an annular element assembly frame E, and are driven by an element drive shaft 10, an element rotation thrust radial bearing 13, and a sealing plate 4 by a drive source (not shown).
c etc., the backwash water nozzle can be rotated in either the forward or reverse direction around the central pipe 5a. The lower part of the element assembly frame E is open, and the open part is sealed with an element lower seal part 15. Reference numeral 5a denotes a backwash nozzle central pipe which stands vertically in the center of the container 1 with its lower end fixed to the container plate 1b, and its upper end opening is at the center of the lower surface of the sealing plate 4c of the element assembly frame E. They are in fluid-tight and mutually rotatable abutment. 5 is connected to the backwash nozzle center pipe 5a, and is arranged inside the element toward the center of the element inspection port 17, and the element material 4
The backwash water is press-fitted from the backwash water inlet 16 into the backwash nozzle center pipe 5a through the slit hole of the backwash nozzle 5, and the backwash water flows in the vertical direction. Multiple pieces (in this example, 3
The liquid is injected from the back side of the element material 4 to the front side (element primary side e1 ₎ through the flow path 5b of the element material 4.

The backwash water discharge guide plate 6 serves to guide the dust backwashed as described above, together with the backwash water containing it, to the backwash water discharge port 9 which discharges the dust to the outside of the container 1.
is attached to the element inspection port 17, has a funnel-shaped cross section, and its tip coincides with the center of the backwash nozzle 5 at its center, and the interval between the side plates is equal to the element partition frame 4a of the slag storage chamber 4b, and the partition frame It is installed close to the tip of 4a. A cutter 7 having an L-shaped vertical cross section is attached to the outside of each side plate, and the blades of the cutter 7 are attached so as to cover the slag storage chambers 4b on both the left and right sides (the fourth
(See figure) Also, the upper part of the backwash water discharge guide plate 6 is sealed, and the lower part is open and placed close to the backwash water discharge port 9. In addition, a bottom slag reservoir 3 is provided at the bottom that is inclined toward the direction of the container 1 and the backwash water outlet 9, and a gap is provided between the container bottom slag reservoir 3 and the backwash water containing dust is removed from the backwash water. It is designed to easily flow out to the outlet 9. In the figure, W is the undiluted solution, W ₁ is overwater, e ₁ is the primary side of the element, e ₂ is the secondary side of the element, d ₁ is dust before and during backwashing, and d ₂ is dust after backwashing. , respectively.

One embodiment of the present invention is configured as described above, and even when water is supplied with an undiluted solution having a significantly high dust concentration, the annular element assembly frame E is rotated by the driving source, and the element material 4 is rapidly clogged. No pressure drop occurs, backwashing operations can be carried out with plenty of time, and functionality can be maintained. This effect is achieved by applying rotational motion to the cylindrical element in which the slag storage chamber 4b is formed by the element partition frame 4a in which the element material 4 has slit-like openings, that is, the undiluted solution flowing in from the inlet passes through the element partition frame 4a. As a result, a vortex is generated in the slag reservoir chamber 4b, which sucks the dust that is trying to fill the element material 4 inside and floats in the slag reservoir chamber 4b, preventing a sudden pressure drop. It is. Therefore, when the slag storage chamber 4b faces the backwash water discharge guide plate 6,
The dust in the slag storage chamber 4b is discharged and guided to the backwash water outlet 9.

Next, when the overwater outlet 12 is opened to the atmosphere as it is, the backwashing function is always maintained even if the secondary pressure is low and there is no or very little difference from the backwash water outlet 9. This action is such that the backwash water from the backwash water inlet 16 is ejected from the backwash nozzle 5 to backwash the dust of the element material 4 from the back side, and is led to the backwash water discharge guide plate 6, where the backwash water is discharged. This is done by force-feeding to the outlet 9 and discharging it outside the container 1, and also backwashing not only small dust but also dust and discharging it out of the container 1 from the backwash water outlet 9. is possible. This action is achieved by installing cutters 7 as shown in Fig. 4 on both sides of the tip of the backwash water discharge guide plate 6 to easily remove dust, foreign objects, plants, fish and shellfish, vinyl, etc. protruding from the slag storage chamber 4b. It is cut by the rotation of the element assembly frame E between the element partition frame 4a and the slag storage chamber 4 on the downstream side.
This is carried out by dividing the water into pieces that can be stored in the container b, guiding it into the backwash water discharge guide plate 6, and discharging it from the backwash water discharge port 9 to the outside of the container.

In addition, dust and foreign matter in the bottom slag storage chamber 3 of the container can be removed by the backwash water discharge flow due to the slope of the bottom slag storage chamber 3 from the backwash water discharge port 9 and the arrangement of the inlet to the discharge port 9. As a result, dust flows forcefully from the inlet to the outlet 9.

One embodiment of the present invention is configured as described above, and if the element material 4 of the automatic cleaning device becomes clogged during operation and the overaction of the element material 4 of the stock solution W becomes insufficient, the element material 4 Inspect through the inspection port 17 and backwash the element material 4.

In this case, at the same time as the backwash water is press-fitted into the backwash nozzle central pipe 5a from the backwash water inlet 16, the element rotating shaft 10 is rotated in the forward or reverse direction by a drive source (not shown). Then, this backwash water rises in the backwash nozzle center pipe 5a, and intensively flows radially from the element secondary side _e2 to the element primary side _e1 through the flow path 5b. At this time, the backwash water passes through the slag storage chamber 4b, passes through each slit hole in the element material 4 inside, and is ejected from the back side of the element material 4 to the front side, and is guided by the backwash water discharge guide plate 6 for backwashing. The water is discharged from the water outlet 9 to the outside of the container together with foreign matter (dust). In this case, the bottom slag reservoir 3 of the container 1
The slope serves to facilitate the discharge of backwash water from the outlet 9.

The foreign matter in the sewage was filtered out as described above, and the part of the foreign matter that protruded to the outside of the slag storage chamber 4b was removed.
It is divided into pieces by the cutter 7 and guided to the slag storage chamber 4b on the downstream side, so that overaction can be carried out efficiently.

Super water W from which foreign substances have been removed as described above
is discharged from the excess water outlet 12.

Since the device of the present invention has the above-described configuration and operation, according to the present invention, when the element material 4 of the filter device becomes clogged and the efficiency of the filter device decreases, The foreign matter attached to the element material 4 can be removed in a short period of time with an extremely simple operation of stopping the operation of the filtering device and simply pressurizing backwash water from the backwash water inlet 16 into the backwash nozzle center pipe 5a. In addition to being easy to remove in small pieces, the backwash water discharge guide plate 6 allows the backwash water to be dissipated to the outside, thereby providing a practical effect of reliably preventing a pressure drop.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is a cross-sectional view, FIG. 2 is a longitudinal sectional view, FIG. 3 is a sectional view of the element material, and FIG. 4 is an enlarged view of part A in FIG. 1. be. 1: Cylindrical container, 2: Lid, 3: Container bottom slag storage chamber, 4: Element material, 4a: Element partition frame, 4b: Slag storage chamber, 4c: Sealing plate, 5a: Backwash nozzle center pipe, 5: Backwash nozzle, 5b: flow path,
6: Backwash water discharge guide plate, 9: Backwash water discharge port, 1
0: Element rotation axis, 11: Stock solution inlet, 12:
Overwater outlet, 13: Element rotating thrust radial bearing, 14: Grand seal, 15: Element lower seal, 16: Backwash water inlet, 17: Element inspection port, W: Undiluted solution, W ₁ : Overwater, d ₁ ,
d ₂ : Dust (foreign matter), W ₂ : Backwash water, E: Element assembly frame.

Claims (1)

[Claims] 1 A vertically elongated cylindrical container 1 whose upper end opening is sealed with a lid 2, has a bottom plate 1b, has a stock solution inlet 11 and a superhydrant outlet 12 at appropriate positions on the peripheral wall, and is fixed in a vertical manner.
Element partitions are disposed concentrically in the container 1 so as to be rotatable in the forward and reverse directions, have a sealing plate 4c fixed to the top, and are arranged radially in the radial direction at equal intervals along the circumferential direction. A slag storage chamber 4 in which an element material 4 is stored between adjacent partition frames 4a of frames 4a.
b, a plurality of annular element assembly frames E connected in a circular manner, a lower end opening fixed to the center of the bottom plate 1b of the cylindrical container 1 in a closed manner, and an upper end opening of the sealing plate 4c of the annular element assembly frame E; It is connected to the backwash nozzle center pipe 5a which is fluid-tightly and mutually rotatably abutted to the center of the lower surface, and is located inside the element material 4 of the annular element assembly frame E toward the center of the element inspection port 17. A backwash nozzle 5 with a slit hole in contact with the inside of the material 4, and an element inspection port 1 with a funnel-shaped cross section.
7, the tip is aligned with the center of the backwash nozzle 5, and the spacing between both side plates is equal to the spacing between the element partition frames 4a of the slag storage chamber 4b, and so that they are in contact with the partition frames 4a. A backwash water discharge guide plate 6 is arranged, the upper part is sealed, the lower part is open, and the size is set to cover the slag storage chamber 4b, and the outside of both side plates of the backwash water discharge guide plate 6. The cutter 7 is attached so as to cover the left and right adjacent slag storage chambers, and the cutter 7 is approximately L-shaped in longitudinal cross section, and the cutter 7 rotatably penetrates the center part of the lid 2 of the cylindrical container 1 in a fluid-tight manner. The annular element is connected to its extending end with a drive source capable of forward and reverse rotation, and whose lower end is connected to the element rotating thrust radial shaft 13 provided in the center of the sealing plate 4c of the annular element assembly frame E. A backwashing device for an automatic cleaning device characterized by comprising an element rotating shaft 10 connected to an assembly frame E.