JP2001062329A - Excretion residue washing apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To separate and discharge foreign materials such as sand and small stones to facilitate subsequent treatment. SOLUTION: In a washing apparatus wherein a washing cylinder 20 is provided in an outer cylinder 1 horizontally provided in a freely rotatable manner so as to be rotated along with the outer cylinder 1 and a separation screen 30 is provided to the outlet of the washing cylinder 20 and washing water is sprinkled over the excretion residue charged in the washing cylinder 20 to be agitated and sand discharged in the outer cylinder 1 from the separation screen 30 is discharged from the end part of the outer cylinder 1 by the screw blades 11 provided to the outer cylinder 1, a separation mechanism for mainly separating the discharged matter from the outer cylinder 1 into sand and impurities other than sand is provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sewage cleaning apparatus for cleaning sewage generated when sewage is screened in a sewage treatment facility such as a sewage treatment plant, and more particularly to sand discharged from an outer shell. And sand and other contaminants to facilitate subsequent processing.

[0002]

2. Description of the Related Art Conventionally, this type of residue cleaning apparatus is provided with a washing drum that rotates together with the outer drum in an outer drum that is rotatably mounted horizontally. A separation screen is provided on the outlet side of the washing drum, and a dewatering screen cylinder that rotates together with the outer drum is provided on the outlet side of the outer drum. Further, the outer shell is provided with a screw blade and a scraping blade for discharging sand discharged from the separation screen to the outside of the outer shell (for example, see Japanese Unexamined Patent Publication No.
322756).

[0003] Therefore, when scum residue is introduced from one end side (entrance side) of the washing drum, the scum residue is washed by the disturbance caused by the rotation of the washing drum, and contaminants adhering to the sludge are removed.
Deposits such as sand are peeled off. The sand among the separated substances is discharged to the inside of the outer shell through a separation screen provided at the other end (exit end) of the washing drum, and then the screw blade and the scraper provided on the outer shell are discharged. It is discharged to the outside of the outer trunk through the raising blades. The residue is discharged into the dewatering screen cylinder. Then, the residue in the dewatering screen cylinder is washed with washing water and then discharged from the outlet end of the dewatering screen cylinder.

[0004]

However, in the above-described conventional residue cleaning apparatus, the sand discharged from the outer cylinder contains contaminants such as pebbles and gravel in addition to the sand.
Subsequent processing was sometimes inconvenient.

Accordingly, the present invention has been made to solve the above-mentioned problems, and an object of the present invention is to discharge the waste to a particle size or separate sand and other contaminants to discharge. And
An object of the present invention is to provide a residue cleaning apparatus capable of facilitating subsequent processing.

[0006]

In order to achieve the above object, a residue cleaning apparatus according to the present invention is provided with a washing drum provided inside a rotatably mounted outer drum so as to rotate together with the outer drum. A separation screen is provided at the outlet side of the washing drum, and the sediment that has been thrown into the washing drum and disturbed is received, the washing water is sprayed and washed, and sand discharged from the separation screen into the outer drum. In the cleaning apparatus, the waste discharged from the outer shell is mainly separated into sand and other contaminants in a cleaning device configured to discharge the waste from the end of the outer shell by a screw blade provided on the outer shell. A separation mechanism is provided.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a longitudinal sectional view of a residue cleaning apparatus according to an embodiment, in which an outer shell 1 has tires 2a and 2b on outer circumferences at both ends thereof, and these tires are provided on a gantry (not shown). Are rotatably mounted on the rollers 3a, 3b.

A sprocket 4 is provided around the center of the outer shell 1 and a chain driven by a motor (not shown) is stretched. Further, an end plate having an opening 5 at the center of one end (left end) of the outer shell 1, and an inside thereof provided with a raising blade 6 for raising sand collected by a screw blade 11 described later. 7 are provided. The end plate is provided with a chute 7a supported by a support member (not shown), and is configured to discharge sand and contaminants scraped up by the scraper blades 6 to the outside of the outer body 1. ing.

The opening 5 of the outer shell 1 is provided with a trumpet-shaped guide cylinder 7b, which constitutes the separation mechanism of the present invention, which is open outward (to the left in FIG. 1), and inside the guide cylinder 7b. A sieve cylinder 7c is provided so as to surround a chute 45 described later.

The sieve cylinder 7c is formed to be slightly longer than the guide cylinder 7b, and is made of an apertured sieve through which sand passes, for example, a punching metal. The tip (left end) of the sieve cylinder 7c is configured to be located at a later-described contaminant discharge port 47b.

The guide cylinder 7b is configured to receive sand sieved from the sieve cylinder 7c and send it to a sand discharge port 47a described later.

The other end (right end) of the outer shell 1 has an opening 8 at the center.
Is provided, and a dewatering screen cylinder 10 is provided outside the end plate 9. The opening 8 provided in the end plate 9 has a larger diameter than the opening 5 provided in the end plate 7 described above, and therefore, the water level in the outer cylinder 1 is regulated by the edge 8 ′ of the opening 8. You. In addition, outer trunk 1
The sand and the contaminants discharged from the separating portion 20b of the washing drum 20 and the separating screen 30, which will be described later,
Are provided on the inlet side (the left side in FIG. 1) of the screw blade 11, and weir plates 12, 12... Are provided at several places of the screw blade 11.

The dewatering screen cylinder 10 holds a plurality of pipes 13, 13... Composed of a number of pipes having the same diameter and the same length at predetermined intervals, for example, the gap between the adjacent rods is about 3 to 5 mm. One end of the bar 13 is fixed to the periphery of the opening 8 of the end plate 9 by welding, and the other end is fixed to the ring member 14 by welding. Also, on the outside of the dewatering screen cylinder 10, anti-entanglement plates 1 along the longitudinal direction of the respective rods 13, 13,.
3 'is provided by welding.

A plurality of screw blades 1 are provided on the inner wall of the dewatering screen cylinder 10, that is, on the inner wall of each of the rods 13, 13,.
5, 15... Are fixed by welding, and are formed so that the residue inside the dewatering screen cylinder 10 can be transported toward the outlet end of the dewatering screen cylinder 10 by rotating in one direction.

The washing drum 20 has a smaller diameter than the outer drum, and
It has a length of about の of the outer shell 1 and is concentrically fixed to the left side of the outer shell 1 by a plurality of support members 21, 21. One end of the washing drum 20 (the side opposite to the dewatering screen 10) is formed in the washing section 20a, and the other end (the separation screen 30 side described later) is formed in the separating section 20.
b.

At one end (entrance side) of the washing section 20a, an end plate 2 provided with an opening 22 having substantially the same diameter as the opening 5 described above.
Three. And, on the inner wall of the washing drum 20,
A plurality of baffle plates 25, 25 ... and a plurality of weir plates 25 ', 25' ... are provided at predetermined intervals in the longitudinal direction of the washing section 20a. The separating portion 20b is formed of a cylindrical screen formed by maintaining a bar 26 having a triangular cross section on the circumference at a predetermined interval, for example, an interval of about 10 mm. A plate 27 having a predetermined length is provided to protrude outward from the top of the triangular cross section forming each bar 26. Therefore, even if a part of the residue is protruded from between the bars 26, it is possible to effectively prevent the residue from being entangled with the bars 26 by the plate member 27 and causing the separation portion 20b to be clogged. Further, a blade member 28 is provided in the separation portion 20b for preventing the residue from growing in a lump.

The washing drum 20 is divided into a washing part 20a and a separating part 20b. However, when a belt conveyor is used to transfer the sediment to the sewage cleaning apparatus, the washing drum 20 Only the part 20a is provided. However, when the residue is sent to the residue cleaning device by a sand pump such as a submersible pump or a jet pump, a large amount of water is supplied to the residue cleaning device. If part and water can be discharged before the separation screen 30 described later, it is possible to treat the apparatus without increasing the size of the apparatus.

The separation screen 30 is composed of a frusto-conical screen formed by keeping the bars 30a at a predetermined interval, for example, at an interval of about 10 mm. Inside the separation screen 30, when the separation screen 30 rotates, the residue in the separation screen 30 is separated by the separation unit 2.
A scraping blade 31 having an inclined surface that can be discharged to the 0b side is welded.

Covers 40a and 40b are provided on the inlet side and the outlet side of the outer shell 1, respectively. Of these, the cover 40a on the inlet side has a residue supply port 42 at the top and a washing water supply pipe 43 for jetting water downward at a part of the edge of the residue supply port 42, and a washing water supply pipe 43 at the bottom. A chute 45 having a discharge port 44 opened at one lower side (lower left side) inside the washing section 20a of the body 20 is provided. The cover 40a has a cleaning water supply pipe 46 for cleaning sand, a sand discharge port 47a for discharging sand, and a rubber valve 47b 'for discharging contaminants such as pebbles. An object outlet 47b is provided.

The outlet side cover 40b is provided with a supply pipe 48 for supplying washing water for preventing the dewatering screen cylinder 10 from being clogged. The cover 40b is provided with a deflecting plate 50 supported by a support 49 so as to be positioned inside the dewatering screen cylinder 10. Cleaning water sprayed from the supply pipe 48 is supplied to the outer peripheral side by the deflecting plate 50. It is configured to be guided to the closed washing tub 10 '.

Next, the operation of the above configuration will be described. Now, the outer shell 1 is rotated in a predetermined direction by a chain stretched over the sprocket 5, and the scum is removed from the sewage supply port 42 by a large amount of water.
It is assumed that it is thrown into the inlet side of a. By the rotation of the washing unit 20a and the baffle plate 25 provided on the inner wall of the washing drum,
The residue is disturbed in a state of being immersed in the washing water, and thereby the attached matter such as sand is efficiently peeled off from the residue,
The sand is washed. The supply of the washing water from the washing water supply pipe 43 is used only when the chute 45 is washed since the residue contains a large amount of water. Of course, when the residue does not contain a large amount of water, cleaning water is supplied from the cleaning water supply pipe 43.

In the next separation section 20b, a part of the water and a part of the washed sand are discharged to the outer shell 1 side. That is,
The separation unit 20b has a function of pre-processing the separation screen 30.

The residue in the separation section 20b moves to the separation screen 30, where the remaining water and the washed sand are discharged into the outer shell 1 through the openings of the separation screen 30, and the residue and floating are removed. The debris is transferred from the end of the separation screen 30 to the dewatering screen cylinder 10 through the opening 8. Movement of the residue from the separation screen 30 to the dewatering screen cylinder 10 is performed by lifting the scraping blade 31 with the rotation of the separation screen 30 to remove the residue.
It is performed by pushing it to the side. Thereby, the residue does not stay in the separation screen 30.

The residue in the dewatering screen cylinder 10 rolls at the portion of the bottom of the dewatering screen cylinder 10 on the rotation direction side, and moves to the outlet side of the dewatering screen cylinder 10 by the action of the screw blade 15. At this time, the residue is removed from the dewatering screen cylinder 10.
Enters the washing tub 10 'provided at the beginning of the washing machine, and the dirt adhering to the residue is washed away.

The washing water sprayed on the residue and the washing water containing floating substances are sent from a drain port 51 provided below the dewatering screen cylinder 10 to a sewage treatment facility (not shown) for treatment. . The sewage discharged from the outlet of the dewatering screen cylinder 10 is sent from a sewage discharge port 52 to a dehydrator (not shown) to be dewatered, and then disposed of by incineration or the like.

Thread-like residue is present in the residue in the dewatering screen cylinder 10, and most of such residue is formed as a lump residue formed by rolling the residue in the dewatering screen cylinder 10. However, some of them may jump out of the gap between the bars 13. However, the protruding thread-like residue is blocked by the anti-entanglement plate 13 ′, so that the sticking to the bar 13 is prevented. Therefore, when the spinning dewatering screen cylinder 10 is lifted upward by rotating the dewatering screen cylinder 10, the spattered thread-like residue falls down due to the action of its own weight and the washing water from the supply pipe 48, and is entangled with the rolling massive residue. Removed
Clogging of the dewatering screen cylinder 10 is effectively prevented.

The contaminants such as sand and pebbles discharged into the outer shell 1 from the separation section 20b and the separation screen 30 are directed by the screw blades 11 in the direction indicated by the solid arrow A, that is, toward the supply side of the residue. Move. During this movement, the washing water supplied from the supply pipe 46 flows toward the other end of the outer shell 1 (see arrow B in FIG. 1), so that the sand and the washing water come into countercurrent contact and are washed. Further, since the water is disturbed by the weir plate 12, washing of sand and contaminants is further promoted. The washed sand and contaminants are lifted by the scraping blades 6 and then transferred into the sieve cylinder 7c via the chute 7a. The sand is guided from the opening of the sieve cylinder 7c to the guide cylinder 7b and is discharged from the sand discharge port 47a. Contaminants other than sand are discharged to the contaminant discharge port 47b. The wastewater from which sand and contaminants have been washed is discharged from the drain port 51 together with the wastewater from which the residue is washed.

The residue cleaning apparatus having the above-described structure can separate and discharge sand and small objects such as pebbles, thereby facilitating subsequent processing.

FIG. 2 shows another example of the separation mechanism according to the present invention, in which a sand discharge port 47a is provided below a chute 7a.
The portion is formed on a sieve made of a perforated punched metal or the like that allows sand to pass through, and the slant that can guide the remnants on the sieve, ie, the contaminants, to the contaminant discharge port 47b. The separation plate 7d serves as a separation mechanism. Due to the separation plate 7d, the discharge having a small particle diameter is supplied to the sand discharge port 47a, and the discharge having a large particle diameter is supplied to the contaminant discharge port 47b.
Separation is possible according to the particle size. Thus, when the separation mechanism 7d is a single separation plate 7d, there is a feature that it can be manufactured at low cost.

[0030]

According to the present invention, there is provided a residue cleaning apparatus, wherein a washing drum is provided in a rotatably mounted outer drum so as to rotate together with the outer drum, and a separation screen is provided at an outlet side of the washing drum. Screw blades provided in the outer shell of the washing machine, which receive the disturbed residue which has been thrown into the washing cylinder, disperse the washing water, wash the sprayed water, and discharge the sand discharged from the separation screen into the outer shell. In the cleaning device that is discharged from the end of the outer shell by the above, a separation mechanism is provided for mainly separating the discharge discharged from the outer shell into sand and other contaminants. Can be facilitated.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a residue cleaning apparatus according to an embodiment of the present invention.

FIG. 2 is a longitudinal sectional view of a part of a residue cleaning apparatus according to another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Outer body 7a Chute 7b Guide cylinder 7c Sieve cylinder 7d Separation plate 11 Screw blade 20 Washing cylinder 30 Separation screen

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[Procedure amendment]

[Submission date] September 2, 1999 (1999.9.2)

[Procedure amendment 1]

[Document name to be amended] Drawing

[Correction target item name] All figures

[Correction method] Change

[Correction contents]

FIG.

FIG. 2

Claims (1)

[Claims] 1. A washing drum is provided in a rotatably suspended outer drum so as to rotate together with the outer drum, and a separation screen is provided at an outlet side of the washing drum. The disturbed residue is received, the washing water is sprayed and washed, and the sand discharged from the separation screen into the outer shell is discharged from the end of the outer shell by screw blades provided on the outer shell. The above-described cleaning device, further comprising a separation mechanism that mainly separates the discharge discharged from the outer shell into sand and other contaminants.