JP2937416B2 - Cleaning equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial applications]

The present invention relates to an apparatus for cleaning sewage generated when sewage is screen-treated in a sewage treatment facility such as a sewage treatment plant, and more particularly to a dewatering screen cylinder (hereinafter, referred to as a dewatering screen cylinder) which is disturbed in a washing drum. (Referred to as a dehydration cylinder).

[Prior art]

Conventionally, this type of apparatus is provided with a washing cylinder that rotates together with the outer cylinder in an outer cylinder that is rotatably suspended,
On the outlet side of the washing drum, a dewatering drum that rotates together with the outer drum is provided. When the residue is put in from one end (entrance side) of the washing drum,
The residue is disturbed with the rotation of the washing drum, and contaminants, sand and the like attached to the residue are peeled off. Usually, in the washing drum, for example, a rubber ball (rotator) having a specific gravity of 1 or more is built in. With the rotation of the washing drum, the rotator rotates at the bottom of the washing drum and rubs off the residue. Effluents are efficiently removed from the residue. The sedimented substances such as sand among the separated substances are discharged out of the outer cylinder through a screen provided at the other end (exit end) of the washing cylinder, and the residue and floating contaminants are dehydrated. It is discharged into the trunk. In the dehydrating cylinder, the sediment is separated from the residue as floating attachments. That is, the floating deposits are discharged together with the washing water through the openings of the dehydrating cylinder, and the dewatered residue is discharged from the outlet end of the dehydrating cylinder. Further, in the dewatering cylinder, a bucket that rotates together with the dehydration cylinder is provided in order to efficiently remove the deposits from the residue, and the washing water is pumped up by the bucket and poured onto the residue.

[Problems to be solved by the invention]

However, the above-mentioned conventional cleaning apparatus is apt to cause clogging due to entanglement of fibrous (filamentous) residues in the openings of the screen of the dehydrating cylinder, and the cleaning water containing floating contaminants. Since the water is washed by pumping it up in a bucket and washing it, there is an inconvenience that washing of the residue is not perfect. SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a cleaning apparatus which is less likely to cause clogging of a dehydrating cylinder and has a high cleaning effect on residue.

[Means for Solving the Problems]

In order to achieve the above object, the present invention provides a washing drum provided inside a rotatably mounted outer drum so as to rotate with the outer drum, and rotates together with the outer drum at the outlet side of the washing drum. A dewatering cylinder is provided, and the residue is disturbed in the washing drum in the dehydration cylinder, and the dewatering is performed while spraying and washing water for washing and dewatering, and is discharged by a screw blade provided on the inner wall of the dehydration cylinder. In the cleaning device, the dewatering cylinder is formed by arranging a plurality of rods of a predetermined length at predetermined intervals in the length direction, and the rod is provided outside the dehydration cylinder in a longitudinal direction thereof. It is characterized in that a entanglement prevention plate is provided which protrudes in the direction. Further, a washing water supply means is provided at an upper position and an inner position of the dehydrating cylinder.

[Action]

In the above configuration, the anti-entanglement plate prevents the residue discharged from the gap between the rods from sticking to the rod. The washing water from the washing water supply means provided above the dehydrating cylinder causes the residue in the gap between the bars to flow out and is sprayed on the residue. Then, the washing water is used to wash the residue together with the washing water from the washing water supply means provided inside the dehydrating cylinder.

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a longitudinal sectional view of the embodiment device,
Tires 2a and 2b are provided on the outer periphery of both ends, and these tires are rotatably mounted on rollers 4a and 4b provided on the gantry 3. A sprocket 5 is provided on the outer periphery of the center of the outer shell 1, and a chain driven by a motor (not shown) is stretched. An end plate 8 having an opening 6 at the center of one end (right end) of the outer shell 1 and having a scraping blade 7 inside.
Is provided. The other end (left end) of the outer shell 1 is provided with an end plate 10 having an opening 9 in the center, and a guide tube formed of a frusto-conical screen disposed inside the end plate 10 so as to surround a screen described later. 11 are provided. Outside the end plate 10, a cylindrical dehydrating cylinder 20 which is a characteristic part of the present invention described in detail later will be described.
The dewatering cylinder 20 is provided at the other end of the outer cylinder 1 and partially surrounded by the guide cylinder 12. The opening 9 provided in the end plate 10 has a larger diameter than the opening 6 provided in the end plate 8, and therefore, the water level in the outer cylinder 1 is regulated by the edge 9 'of the opening 9. . A screw blade 13 is provided on the inner wall of the outer shell 1, and semicircular plates 14, 14... Are provided at several places of the screw blade. The washing drum 30 has a diameter smaller than that of the outer drum and approximately half the length of the outer drum 1, and is fixed to the right end in the outer drum 1 by support members 31, 31,. One end of this washing drum 30 (entrance side)
Has an end plate 33 provided with an opening 32 having substantially the same diameter as the above-mentioned opening 6, and a frusto-conical screen 34 is provided on the outside of the other end (outlet side). A plurality of spherical rotors 25 made of a material having a specific gravity of 1 or more, such as rubber or metal, are built in the washing drum 30. Covers 40 and 41 are provided on the entrance side and the exit side of the outer shell 1, respectively.
Is provided. The inlet cover 40 is provided with a residue supply port 42, a cleaning supply pipe 43, and a sand discharge port 44, and the outlet cover 41 has cleaning water, which is a characteristic component of the present invention described later in detail. First and second cleaning water supply pipes 50 and 51 are provided as supply means. FIG. 2 is an enlarged view of part A of FIG. 1 and FIG. 3 is a view of FIG.
FIG. 3 is a cross-sectional view taken along the line III-III, showing the dehydrated copper 20 in detail. The dehydrating cylinder 20 is a rod made of many pipes of the same diameter and length.
Are formed circumferentially at predetermined intervals, for example, so that the gap between adjacent rods is about 3 to 5 mm, and one end of the rod 21 is connected to the end plate 10. Is fixed to the periphery of the opening 9 by welding and the other end is a ring member.
22 is fixed by welding. In addition, this bar 21
Not limited to a pipe, a round bar, a square bar, or the like may be used. Outside the dehydrating cylinder 20, an anti-entanglement plate 23 is provided by welding along the longitudinal direction of each of the bars 21, 21. The anti-entanglement plate 23 has one end in contact with the end plate 10, the other end reaching the distal end position of the guide tube 12, and a height
To the inner wall. On the inner wall of the dewatering cylinder 20, that is, the inner wall of each member 21, 21 ...
The plurality of screw blades 24 are fixed by welding, and are formed so that the residue inside the dehydrating cylinder 20 can be transferred toward the outlet end of the dehydrating cylinder 20 by rotating the dehydrating cylinder 20 in one direction. The first cleaning water supply pipe 50 is provided at a position above the dehydrating cylinder 20 except for the position where the anti-entanglement plate 23 is provided.
The washing water supply pipe 51 is provided inside the dehydrating cylinder 20, and is configured so that clear washing water is supplied from a washing supply pump (not shown) via valves 50 'and 51'. FIG. 4 shows an arrangement relationship between the washing water supply pipes 50 and 51 and the dehydrating cylinder 20. Both the washing water supply pipes 50 and 51 are arranged in the upper half of the dehydrating cylinder 20. Among them, the first washing water supply pipe 50 is provided in the rotation direction of the dehydrating cylinder 20 (see the arrow in FIG. 4).
And the second cleaning water supply pipe 51 is located in the rear half of the rotation direction, for example, the first cleaning water supply pipe 50.
At an angle of 45 ° from the horizon, and a second flush water supply pipe
51 is arranged at an angle advanced by 90 ° from the first washing water supply pipe 50. The washing water in the first washing water supply pipe 50 is positioned so as to face the anti-entanglement plate 23, and the washing water in the second washing water supply pipe 51 is oriented substantially toward the central axis of the dehydrating cylinder 20. I have. Next, the operation of the above configuration will be described. Now, the outer shell 1 has been rotated in a predetermined direction (the direction of the arrow in FIG. 4) by a chain stretched over the sprocket 5, and the sludge is thrown into the washing drum 30 from the sludge supply port 42. Then, the residue is disturbed by the rotation of the washing drum 30 and the rotation of the rotator 35 built in the washing drum, and the adhered matter such as sand is efficiently separated from the residue. The residue and the detached deposit move to the exit side of the washing drum, and the sedimentary deposit (sand) falls into the outer drum 1 through the opening of the screen 34, and the residue and the floating deposit. Is discharged from the exit end of the screen 34 into the guide cylinder 11. The rotator 35 is attached to the washing drum by the inclination of the screen 34.
Retained within 30. The residue received in the guide cylinder 11 is transferred to the dehydrating cylinder 20 through the opening 9. As shown in FIG. 4, the residue in the dehydrating cylinder 20 rolls at the portion on the rotation direction side of the bottom of the dehydrating cylinder 20, and the screw blades
By the action of 24, 24, it moves to the exit side of the dehydrating cylinder 20. Then, during this movement, the washing water from the first and second washing water supply pipes 50 and 51 is sprayed, and the dirt adhering to the residue is washed away. The washing water sprayed on the residue and the washing water containing buoyant deposits are sent to a sewage treatment facility (not shown) from a drain port 46 provided below the dehydrating cylinder 20 for treatment. The sewage discharged from the outlet of the dewatering cylinder 20 is sent from a sewage discharge port 47 to a dehydrator (not shown) to be dehydrated, and then disposed of by incineration or the like. In the residue in the dehydrating cylinder 20, there is a thread-like residue,
Most of such residue is entangled with a lump formed by rolling the residue with a dehydrating cylinder, but a part of the residue is, as shown by a two-dot chain line in FIG. May jump out of However, the protruding thread-like residue is blocked by the anti-entanglement plate 23, so that sticking to the bar 21 is prevented.
Therefore, when the dewatering cylinder 20 is rotated and lifted upward, the spun thread-like residue that has fallen out due to its own weight and the action of the washing water from the first washing water supply pipe 50, and rolls to form a lump-shaped residue. The dewatering cylinder 20 is prevented from being clogged. At the outlet side of the dehydrating cylinder 20, the thread-like residue is already reduced by being clumped by the rolling lumps, and the amount of protrusion from the bar 22 is small, and there is no fear of clogging. Therefore, the anti-entanglement plate 23 does not need to be provided in the entire length direction of the bar 21. Note that the direction of jetting of the washing water from the first washing water supply pipe 50 is such that not only the anti-entanglement plate 23 side but also the jetting direction of the dewatering cylinder 20 is jetted, so that all the openings of the dehydrating cylinder 20 are washed. You may. The sand in the outer shell 1 is moved by the screw blades 13 in the direction indicated by the solid arrow A, that is, toward the supply side of the residue. During this movement, a washing water supply pipe is connected to one end of the outer shell 1.
Since the washing water supplied from 43 is flowing toward the other end of the outer shell 1 (see the chain line b in FIG. 1), the sand and the washing water are washed in countercurrent contact. In addition, the sand is disturbed by the plate 14 so that washing is more facilitated. The washed sand is transferred to the sand discharge port 44 by the scraping blade 7. The wastewater from which the sand has been washed is discharged from the outlet 46 together with the wastewater from which the residue has been washed. In the present embodiment, since the anti-entanglement plate 23 is provided outward of the rod 21 constituting the dehydrating cylinder 20, it is possible to prevent the thread-like residue from being entangled with the dehydrating cylinder 20. Since the cleaning water in the supply pipe 50 is supplied toward the anti-entanglement plate 23, clogging of the dewatering cylinder 20 can be effectively prevented. Also, unlike the conventional method of pumping and spraying the washing water in the dehydrating cylinder with a bucket, the washing water sprayed to the residue in the dewatering cylinder 20 can spray clean washing water, so that the cleaning water The cleaning can be more complete.

【The invention's effect】

Since the apparatus of the present invention is provided with an anti-entanglement plate outward of the rod constituting the dehydrating cylinder, it is possible to prevent the residue from sticking to the dehydrating cylinder, and to wash the washing water of the washing water supply pipe to the dehydrating cylinder. Since it is supplied from the outside, clogging of the dehydrating cylinder can be effectively prevented. In addition, the washing water that is sprayed on the residue in the dehydrating cylinder can be sprayed with clean washing water, unlike the conventional method of pumping and spraying the washing water in the dehydrating cylinder with a bucket. Can be more complete.

[Brief description of the drawings]

1 is a longitudinal sectional view showing an embodiment of the apparatus of the present invention, FIG. 2 is an enlarged view of a portion A in FIG. 1, FIG. 3 is a sectional view taken along the line III-III in FIG. It is explanatory drawing which shows the arrangement relationship of a washing water supply pipe. 1 ... outer shell, 20 ... dehydration cylinder (dehydration screen cylinder), 21 ... bar, 23 ... anti-entanglement plate, 30 ... washing cylinder, 50, 51 ... washing water supply pipe (washing water supply means) ).

Claims (2)

(57) [Claims] 1. A washing drum is provided in a rotatably suspended outer drum so as to rotate with the outer drum, and a dewatering screen drum rotating with the outer drum is provided at an outlet side of the washing drum. In a washing apparatus in which the residue which has been disturbed in the washing drum in the washing drum is received and sprayed with washing water for washing and dewatering, and is discharged by a screw blade provided on the inner wall of the dewatering screen drum. The dewatering screen cylinder is formed by arranging a plurality of rods of a predetermined length at predetermined intervals in the longitudinal direction, and the rods are formed in the longitudinal direction of the dehydrating screen cylinder in an outward direction of the dewatering screen cylinder. A residue cleaning device characterized by having a projection preventing plate. 2. A washing water supply means is provided at an upper position and an inner position of said dewatering screen cylinder.
A residue cleaning device as described in the above.