JPH05208105A - Rotary body type dust extractor - Google Patents

Abstract

PURPOSE:To allow the subject dust extractor to correspond even to large load fluctuations and to enable long-time continuous safe operation by providing a low speed rotary body provided with a plurality of arrow wheel-shape dust extracting plates and a secrew conveyor discharging the solid in raw water falling from the dust extracting plates. CONSTITUTION:Raw water L flows in a rotary body 3 through a raw water supply pipe 8 and the solid S caught by a dust extracting plate is carried upwardly, with the low speed rotation of the rotary body 6 due to a motor 6. The dust extracting plate consists of a large number of narrow dust extracting plates l0a and a small number of wide dust extracting plates 10b. When the outer end of the dust extracting plate moves upwardly so as to become higher than the inner end thereof, the solid S falls in a conveyor trough 20 under gravity through the wide dust extracting plates l0b and is sent rearward by the action of a screw conveyor 25 to be discharged from the solid discharge port 22 provided to the rear end of the trough. The number of rotations of the rotary body is appropriately controlled corresponding to the flow rate of raw water or an increase or decrease in the amount of dust. By this constitution, a dust extractor can correspond even to large load fluctuations and it can be avoided that fibrous impurities are entangled with the rotary drum.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary drum type dust remover.

[0002]

2. Description of the Related Art Wastewater treatment equipment for domestic wastewater such as sewage and night soil contains wastes such as hair, fibers, pieces of cloth, and wood chips in the raw water. ,
The lower part of the rotating screen 01, which is arranged so as to cross the water channel and is formed by arranging a plurality of screen ring plates in parallel in the axial direction at equal intervals, is partially immersed in the raw water, and this is placed in front of the horizontal center axis. Rotates in the direction in which the screen moves upward, and when the dust attached at the front position of the screen ring plate is rotated to the rear position, it is combed and removed by the scraper 02 to remove the chute 03.
The rotary drum type dust remover that discharges through the

In this type of dust remover, when the raw water inflow decreases and the water level approaches the level of the rotary shaft of the rotary screen, the front surface of the rotary screen rises almost vertically from the water surface. The dust trapped on the screen ring plate cannot be transferred to the rotating screen. Further, if the water level rises too much, waste will overflow with the raw water at the upper end of the rotary screen, and in either case, separation of the waste by the rotary screen will be impossible. Also, since a large amount of fibrous substances such as hair, lint, and pieces of cloth are mixed in the sewage, the fibrous substances may be generated in conventional dust removing members such as screen ring plates, comb plates, wire nets, and perforated plates. Therefore, continuous stable operation for a long time cannot be performed. Furthermore, rotary screens are expensive because they require considerable machining costs.

[0004]

SUMMARY OF THE INVENTION The present invention has been proposed in view of the above circumstances, and can cope with a wide range of load fluctuations, and the fibrous impurities are entangled in the dust removing plate, the rotating drum, and the like. It is an object of the present invention to provide a low-cost, economical variable-capacity rotary drum type dust remover that is easy to manufacture, and can be continuously and stably operated for a long time at a low cost.

[0005]

To this end, the present invention provides
(A) A vertical rotating cylinder supported on a rectangular bed and rotating at a low speed around a horizontal center line to close the front end and having a raw water inlet at the center and an opening at the rear end. ) The inner circumference of the rotary drum is coaxially spaced radially with equal intervals, and the outer ends reach the inner surface of the rotary drum, respectively, and a relatively large diameter central hole is formed at the center. A plurality of arrow-shaped dust removing plates, and (c) the front half is inserted in a cantilever manner into the opening of the rotary cylinder, and the latter half is inside the vertical conveyor trough fixed to the bed behind the rotary cylinder. And a screw conveyer for discharging solid matter in the raw water, which is vertically installed and falls from the dust removing plate, to the outside.

[0006]

According to this structure, the raw water introduced from the raw water inlet flows axially toward the rear end opening of the rotary drum at a low flow rate through the dust removing plate 10 at that time. When the solid matter with a size larger than the opening of the dust catcher is captured at the front end of the dust remover and rises with rotation and the outer end of the dust remover becomes higher than its inner end, the solid matter is treated in the dust remover. It flows down along with the liquid along the downwardly inclined dust removing plate, and falls from the inner end into the falling conveyor trough 20. Here, the dropped large and small solids are carried toward the rear end of the conveyor trough by the action of the screw conveyor 25, and then the discharge port 1
5 is discharged to the outside. Further, when the flow rate of the raw water decreases, the liquid level in the rotary drum 3 only decreases, and the dust removing plate 10
The dust removal effect of does not decrease.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to the drawings, an embodiment of the present invention will be described. FIG. 1 is a longitudinal sectional view thereof, FIG. 2 is a sectional view taken along line II--II of FIG. 1, and FIGS. FIG. 5 is a partial front view of a modified example, and FIG. 5 is a partial front view of FIGS.

First, in FIGS. 1 and 2, reference numeral 1 is a vertically long rectangular bed, and a pair of right and left roller pairs 2 and 2 are arranged at equal intervals in front and rear portions thereof. Reference numeral 3 is a vertical horizontal cylindrical rotary drum rotatably supported on the roller pairs 2 and 4 at four points, the front end of which is closed by a front end plate 4 having a central hole 4a, and the rear end is entirely open. Has become. 6 is a motor fixed to the bed 1, and the motor 6 is a belt 7
The rotating drum is rotated at a low speed of about several rpm / min via.

Reference numeral 8 is a raw water supply pipe which is supported by a column 9 standing upright on the front end of the bed 1 and whose rear end is loosely inserted into the center hole 4a of the rotary drum. The reference numeral 10 designates a large number of radial dust removing plates coaxially arranged on the inner surface of the central portion of the rotary drum 3 at relatively equal intervals and in a relatively dense radial pattern. The wide dust removing plate 10b is provided, and a small number of wide dust removing plates 10b are arranged at equal intervals so as to partition a fixed number of small dust removing plates 10a. These dust-removing plates are formed into blocks 11 each having a predetermined number, and are detachably attached along the inner circumference of the rotating drum to form a coaxial center hole 12 as a whole.

Reference numeral 14 denotes a casing having a lower end fixedly attached to the rear end of the bed 1, which has an opening surrounding the rear end of the rotary drum 3 in a liquid-tight and slidable manner, and has a treated water discharge port at the lower end. Have 15. In the central part of the casing 20, the central part of the casing 20 is horizontally supported in the longitudinal direction of the central part, the front end is blocked by a dam plate 21, the upper end forms a vertically long rectangular opening, and the solid end 22 is at the rear end. With a conveyor trough that opens downwards,
A screw conveyor 25, which is rotated by a motor 23 via a belt 24, is vertically installed along the axis thereof. Reference numeral 27 denotes a spray nozzle that extends longitudinally through the rear wall of the casing 14, and its front end faces the rear surface of the dust removal block 11.

In such an apparatus, the raw water L flowing into the rotary drum 3 through the raw water supply pipe 8 is rotated by the motor 6 at a low speed in the arrow direction (FIG. 2) of the rotary drum 3 to remove the dust plate 1.
The solid matter S captured by 0 is carried upward, and when the outer edge of the dust removing plate moves higher than its inner edge, the solid matter S is
Is dropped by gravity into the conveyor trough 20 through the wide dust removing plate 10b, is sent backward by the action of the screw conveyor 25, and is discharged to the outside from the solid matter discharge port 22 at the rear end. Further, the number of rotations of the rotating drum is appropriately adjusted according to increase or decrease in the flow rate of raw water or the amount of dust.

Here, the dust removing plate 10 will be slightly supplementarily described. The dust removing plate 10 shown in FIG. 1 can also take the shape shown in FIGS. 3 to 4. That is, the wide dust removing plate shown in FIG. 3 has substantially the same shape as that shown in FIG. 1, but the small dust removing plate has a rectangular notch in the inner half of the front edge thereof.

Further, the small-width dust removing plate shown in FIG. 4 has a front end edge which is wide and inclined from the inner end toward the outer end. According to the dust removing plate having the shape shown in FIGS. 3 and 4, when the solid matter S in the raw water L axially flowing in the rotary drum hits the front edge of the dust removing plate and is caught and falls, the solid substance S is removed from the dust removing plate. It becomes easy to separate and drop.

Further, FIG. 5 shows a fan-shaped dust removing block composed of a dust removing plate formed by molding plastic. Since the inner end of each dust removing plate is made thin and becomes thicker toward the outer end, The clearance between adjacent dust removing plates is substantially constant in the radial direction. Therefore, regardless of the radial position change, this type of dust plate has substantially the same solids filtration capacity.

[0015]

According to the invention described above, it is possible to cope with a wide range of load fluctuations, the fibrous contaminants do not get entangled in the dust removing plate, the rotating drum, etc., and it is easy to manufacture and continuously stable for a long time. INDUSTRIAL APPLICABILITY The present invention is extremely useful in industry because it provides a low cost, economical variable capacity, novel structure, rotary drum type dust remover which can be operated.

[Brief description of drawings]

FIG. 1 is an overall vertical sectional view showing an embodiment of the present invention.

FIG. 2 is a cross-sectional view taken along the line II-II of FIG.

FIG. 3 is a vertical sectional view of a modification of the dust removing plate of FIG.

FIG. 4 is a vertical sectional view showing a modification of FIG.

5 is a partial front view showing a modification of FIGS. 3 and 4. FIG.

FIG. 6 is a vertical sectional view showing a known rotary drum type dust remover.

[Explanation of symbols]

1: Bed, 2: Roller pair, 3: Rotating drum, 4: Front end plate, 4a: Center hole, 5: Opening, 6: Motor, 7: Belt, 8: Raw water supply pipe, 9: Strut, 10: Dust removal plate 10,
a: small dust removal plate, 10b: wide dust removal plate, 11: fan-shaped dust removal block, 12: center hole, 14: casing, 15:
Treated water outlet, 20: conveyor trough, 21: dam plate,
22: solid matter discharge port, 23: motor, 24: belt,
25: screw conveyor, 27: spray nozzle,
L: Raw water, S: Solid.

Claims (1)

[Claims] (A) A longitudinal rotation in which a raw water inlet is provided at the center of an end plate which is supported on a rectangular bed and rotates at a low speed around a horizontal center line to close the front end, and the rear end is open. With a torso
(B) Radially arranged at equal intervals in the center of the inner part of the rotary cylinder with equal intervals, and the outer ends reach the inner surface of the rotary cylinder, forming a central hole of relatively large diameter in the center. And (c) a vertical conveyor trough in which the front half is cantilevered into the opening of the rotary drum and the rear half is fixed to the bed behind the rotary drum. A rotary drum type dust remover comprising: a screw conveyor that is vertically installed inside and discharges solid matter in raw water falling from the dust removing plate to the outside.