JPS6156004B2 - - Google Patents

Description

Detailed Description of the Invention This invention uses a rotating disk-type element having a large number of fins arranged with gaps in the axial direction relative to a rotating shaft as a screen element, and separates residue from moisture from the stock solution to be treated. The present invention relates to a screen device that allows for smooth discharge.

To explain the present invention with reference to the illustrated embodiment, 1 is a screen element having a rotating shaft 2, the element 1 has a large disk 3 serving as a fin with a large diameter, and a large disk 3 having a diameter smaller than the large disk but larger than this. Two types of thick small disks 4 are fitted alternately onto the shaft 2, and fixed using a key or other means so that they rotate together with the shaft 2, whereby the large disk 3 serves as a fin and the adjacent large circles Small disk 4 between the plates
(Fig. 2), or by machining the bar with a lathe, for example, and cutting a narrow groove 5 between the fins and cutting shafts 2, 2 at both ends (Fig. 2).
Figure), can be manufactured.

A large number of the screen elements 1 obtained as described above are then inserted into the slit grooves 4' and 5 of the adjacent mating elements to form an intersecting row 6, and the elements 1 constituting the row are are all rotated in one direction, thereby separating the residue in the stock solution from the water separated through the interlocking gap between adjacent elements and discharging it to the other end of the mating row.

FIG. 1 shows an embodiment in which a mating row 6 is arranged in a processing box 7 having both side walls and a bottom wall so as to close an opening. In this embodiment, one end 6a of the mating row is low and the other end 6a is low. The end 6b is high and arranged with a slope, but of course, if the stock solution drains well, it may be arranged horizontally without having a slope.

Each element 1 constituting the row has a shaft 2 protruding from both ends.
A worm wheel or sprocket foil is fixed to one or both ends of the shaft 2 protruding from the side walls, and power is supplied by a worm or chain that engages with the shaft 2. It is transmitted to each element, and in this embodiment, rotates all at once in the direction (arrow) in which the stock solution supplied on one end 6a of the row 6 is fed toward the other end 6b. In addition, one end 6a of the row
A comb tooth portion 8' is provided at the tip of the bottom of the chute 8 that supplies the stock solution to the top, and the leading element 1 (1) at one end 6a is provided.
The comb tooth portion 8' is engaged with the fin 3 and the annular groove 4' or 5. Similarly, the comb tooth portion 9' of the scraper 9 is engaged with the element at the other end 6b of the mating row, that is, the last element 1(n).

As a result, when all the elements 1 are rotated at the same time and the stock solution is supplied onto one end 6a of the mating row by the chute 8, the stock solution moves on the mating row 6 toward the other end, and in the process, the moisture is absorbed into the meshing gap between adjacent elements. In this embodiment, it falls on the bottom wall of the box, flows down along the slope of the bottom wall, and is discharged from the drain 10, leaving a residue on the mating row 6. As the residue in the stock solution approaches the other end 6b of the mating row, moisture is separated and the residue decreases, so it rolls in the valley formed by the adjacent elements, and moves over the elements as the elements rotate. becomes difficult to do. This tendency is remarkable when the intersection row has a slope, and it becomes impossible to move over the elements. For this reason, in the present invention, a means 11 is provided above the element at the other end of the mating row to maintain a gap and squeeze the residue on the element.

In the embodiment shown in FIG. 1, a rotating shaft 12, fins 13, and a slot groove 1 configured similarly to the element 1 serve as squeezing means.
4 is arranged such that the fins 13 are located in the valleys 6' formed by adjacent elements 1,1. The number of fin rolls to be provided as this squeezing means is determined depending on the properties of the residue, etc., but when multiple rolls are used, the fins of adjacent rolls are thrust into the slots of the other roll to intersect, similar to the intersecting row of element 1. let

Then, the fin roll is rotated in the opposite direction to the element 1 and cooperates with the element to remove the residue from the other end 6b of the mating row 6.
At the same time, the comb teeth 15' of the scraper 15 are engaged with the last fin roll from the other end of the mating row.

In this embodiment, the second element from the end and the third element 1 (n-
Fin rolls are placed in the valley between 1) and 1 (n-2) and in the valley between 1 (n-2) and 1 (n-3) in the third and fourth positions, but this is not the first roll. The column from elements 1(1) to 1(n-1) has a slope, but 1(n-1) and the last element 1(n) are horizontal, and 1(n-1) and 1( This is because the residue that has moved into the valley of the element 1(n) passes over the element 1(n) due to the rotation of both elements.

As a result, according to the present invention, the stock solution supplied onto one end of the mating row is moved toward the other end of the row by the rotation of the element, during which water is gradually separated and only the residue remains on the row, and the liquid is transferred to the other end of the row. When it becomes difficult or impossible to move and it tries to stay on the row, squeezing means 1 is applied from above.
Since it is squeezed onto the mating row with 1, the other end 6 is squeezed onto the mating row.
It is extremely convenient because it moves smoothly toward direction b and is also dehydrated by squeezing.

In the embodiment shown in FIG. 4, the mating rows 6 are arranged in a waterway 16, and one end 6a of the row is sloped so that it is always at the bottom of the waterway 16, and the other end 6b is always above the water surface. In the case of this embodiment, an endless band 1 is maintained at intervals on the part of the mating row exposed above the water surface.
7 are opposed to each other to serve as a compressing means 11, and the endless strip is moved in one direction, thereby moving the band facing the elements of the endless strip toward the other end 6b of the row as shown by the arrow. This endless band is preferably made of, for example, a rubber plate or other water-impermeable material. In addition to stretching both ends of the endless strip with support rolls 18, 18, the middle part is also supported from the back with support rolls 18', so that the endless strip is not bent as much as possible by the residue moving toward the other end on the intersecting row. It is preferable.

In the case of this embodiment, water in the raw solution flowing in the water channel 16 flows through the interlocking gaps of the elements in the submerged portion of the mating row, and impurities in the liquid are carried to the water surface by the rotating elements. When raised and exposed to the water surface, it is held by the endless band 17 over the part of the mating row that protrudes above the water surface, and is discharged to the other end 6b of the mating row.

A scraper 19 is applied to the endless strip 17 from the other end of the mating row to scrape off foreign matter that has adhered to the endless strip 17 and is about to return to the water.

Incidentally, it is also possible to use a fin roll shown in FIG. 1 instead of this endless band 17.

Conventionally, micro screens and bar screens for waterways have been known as this type of screen device, but they all have the risk of clogging.
In case of clogging, cleaning equipment and dust removal equipment are required to remove the clogging. However, in the present invention, the elements are arranged in an intersecting state with the fins inserted into the slit grooves of adjacent elements, so the elements mutually clean the slit grooves, and no clogging occurs. Does not require dust removal equipment or cleaning equipment.

Furthermore, the clarity of the separated liquid can be adjusted by appropriately selecting the thickness of the fins and the width of the slotted grooves, and by appropriately selecting the depth of engagement of the fins into the slotted grooves. For example, if the meshing gap based on the fin thickness and the width of the slot groove is reduced (fin thickness 0.3
~0.5mm), groove width 0.6~0.7mm It is possible to remove flocs of suspended solids (SS) from the stock solution and obtain a liquid with extremely high clarity.
can be recovered as a dehydrated cake. or,
If the meshing gap is made larger (fin thickness 2-3 mm, groove width 4-6 mm), small SS in the raw solution will not be captured so much, but it will capture foreign matter from large amounts of sewage in waterways, such as during pre-treatment of sewage treatment. can be removed efficiently, and the impurities are obtained in a dehydrated state, which is convenient for subsequent incineration.

Incidentally, it is preferable that the peripheral speed of the elements constituting the intersecting row be increased toward the other end 6b of the row in order to efficiently remove residues or impurities that tend to clog the annular groove.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal side view showing one embodiment of the present invention, Fig. 2 is a partially sectional plan view of the device used in the above, and Fig. 3 is a partially sectional plan view showing another example of the device. FIG. 4 is a longitudinal sectional side view of another embodiment of the present invention, in which 1 is an element, 3 is a fin, 4' is a slot groove, 6 is a mating row, and 11 is a squeezing means. shows.

Claims (1)

[Claims] 1. A plurality of elements configured by providing a large number of fins with slit grooves maintained in the axial direction are intersected by mutually protruding the fins of adjacent elements into the slit grooves of the other element. A screen device arranged in rows, supplying a stock solution to one end side of the mating row, separating water in the stock solution through interlocking gaps of elements, and obtaining a residue at the other end of the row, wherein: , a screen characterized in that a rotary squeezing means for squeezing the residue on the mating row while maintaining a distance from the mating row is provided, and the rotary pressing means is rotationally driven in a direction opposite to the direction of the elements constituting the mating row. Device. 2. The screen device according to claim 1, wherein the intersecting rows are arranged with a slope so that the other end side is upward.