JPH04243558A - Residue cleaning device - Google Patents

Abstract

PURPOSE:To efficiently separate foreign matter from residue by spraying a washing water against the residue introduced into a washing cylinder and stirring the residue and washing the same with water to separate foreign matter therefrom during its movement in the washing cylinder. CONSTITUTION:When an outer cylinder 1 is rotated to introduce residue from a supply opening 32 into a washing cylinder 20, a washing water is sprayed against the residue from a washing water supply pipe 34 and, by the rotation of a washing cylinder 20 and a baffle plate 25 provided on the inner wall thereof, the residue is immersed in the washing water and stirred therein, so that the foreign matter such as sand is separated therefrom efficiently. The residue and the foreign matter are then moved to the outlet side of the washing cylinder 20, the settlable foreign matter (sand) is dropped through a separating screen 24 into the outer cylinder 1, the residue and the foreign matter in suspension run through an opening 8 into a dehydrating screen cylinder 10, a washing water is sprayed thereagainst from a supply pipe 40 during the movement to an outlet side by a screw blade 15 to wash off contaminants from the residue, the washing water is sent from an outlet opening 41 into a waste liq. treating facility and the residue is sent from an outlet opening 42 into a dehydrating machine.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention relates to a device for cleaning sludge generated when sewage is screened in a sewage treatment facility such as a sewage treatment plant, and in particular, it simplifies the washing of sludge in a washing drum. Concerning what can be done.

0002

2. Description of the Related Art Conventionally, this type of apparatus includes a washing drum which rotates together with the outer drum and has a rotor made of a rubber ball or the like in an outer drum that is horizontally suspended so as to be rotatable. A dewatering screen cylinder that rotates together with the outer cylinder is provided on the outlet side of the cylinder (for example, the Japanese Patent Publication No. 60-51
No. 852, Japanese Utility Model Application No. 61-106348).

[0003] Therefore, when mustard residue is put into one end (inlet side) of the washing cylinder, the residue is disturbed and washed by the rotation of the rotor as the washing cylinder rotates, and the residue adheres to the residue. Removes dirt, sand, and other deposits. Among the detached deposits, sand and other sedimentary substances are discharged to the outside of the outer drum through a separation screen installed at the other end (outlet end) of the washing drum, and sludge and floating pollutants are removed. It is discharged into the dewatering screen cylinder. In the dewatering screen cylinder, floating deposits are discharged along with the wash water through the openings of the dewatering screen cylinder, and the dewatered residue is discharged from the outlet end of the dewatering screen cylinder.

0004

[Problems to be Solved by the Invention] However, in the above-mentioned conventional sludge cleaning device, the removal of deposits from the sludge in the washing drum is done by massaging the sludge with the rotor, so it is necessary to separately prepare the sludge. In addition, there is a drawback that the rotor needs to be replaced due to wear or damage, resulting in high costs. Furthermore, if a large amount of sludge is suddenly thrown into the washing drum, there is a problem in that the rotor flows out of the washing drum and is discharged to the outside together with the sludge. Furthermore, while the sludge cleaning device is in operation, there is a drawback that the rotation of the rotor increases noise.

[0005] Therefore, the present invention has been made to solve the above-mentioned problems, and its purpose is to remove the deposits from the residue without requiring a rotor in the washing drum. The purpose of the present invention is to provide a residue cleaning device.

[0006]

[Means for Solving the Problems] In order to achieve the above-mentioned object, the device of the present invention provides a washing cylinder within an outer cylinder horizontally suspended so as to be rotatable so as to rotate together with the outer cylinder. A dewatering screen cylinder that rotates together with the outer cylinder is provided on the outlet side, and the dewatering screen cylinder receives the disturbed residue thrown into the washing cylinder, and dehydrates it while washing by spraying washing water. The washing device is configured to discharge water through a screw blade provided on the inner wall of the dewatering screen cylinder, and is characterized by being provided with a washing water spraying means for spraying washing water onto the residue thrown into the washing cylinder. Further, the cleaning water dispersing means is provided at the upper part of the chute through which the sludge is introduced into the washing cylinder.

[0007]

[Operation] In the above structure, the washing water from the washing water spraying means is sprayed onto the residue inside the washing drum. While the residue moves through the washing drum, it is washed with water and the deposits are removed from the residue.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the apparatus of the present invention will be described below with reference to the drawings. FIG. 1 is a longitudinal sectional view of the embodiment device,
The outer body 1 has tires 2a and 2b on the outer periphery of both ends thereof,
These tires are mounted on rollers 3 mounted on a frame (not shown).
a, 3b, so as to be rotatable.

A sprocket 4 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 around the sprocket 4. Further, an end plate 7 having an opening 5 at the center of one end (left end) of the outer body 1 and having a raking blade 6 inside is provided.

The other end (right end) of the outer body 1 has an opening 8 in the center.
An end plate 9 is provided, and a dewatering screen body 10 is provided on the outside of 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, and therefore the water level inside the outer cylinder 1 is regulated by the green 8' of the opening 8. . Further, screw blades 11 are provided on the inner wall of the outer shell 1, and weir plates 12, 12...
is provided.

The dewatering screen body 10 is constructed by maintaining a predetermined distance between rods 13, 13, .
The bars 13 are arranged circumferentially so that the bar 13
One end is fixed around the opening 8 of the end plate 9 by welding, and the other end is fixed to the ring member 14 by welding. Moreover, on the outside of the dehydration screen body 10,
Entanglement prevention plate 1 along the longitudinal direction of each bar 13, 13...
3' is provided by welding.

A plurality of screw blades 1 are provided on the inner wall of the dewatering screen body 10, that is, on the inner wall of each bar 13, 13...
5, 15, .

The washing cylinder 20 has a diameter smaller than that of the outer cylinder and has a length approximately half that of the outer cylinder 1, and is concentrically fixed to the left side of the outer cylinder 1 by a plurality of supporting members 21, 21, . . . has been done. One end (inlet side) of this washing drum 20 has an end plate 23 provided with an opening 22 having approximately the same diameter as the opening 5 described above, and a truncated cone-shaped separation outside the other end (outlet side). A screen 24 is provided. A plurality of baffle plates 25, 25, . . . are provided on the inner wall of the washing cylinder 20 at predetermined intervals in the longitudinal direction of the washing cylinder 20.

Covers 30 and 31 are provided on the inlet and outlet sides of the outer shell 1, respectively. Of these, the cover 30 on the inlet side has a washing water supply pipe (washing water dispersion means) having an upward sludge supply port 32 at the top and a downward deflection plate 33 on a part of the edge of this sludge supply port 32. A chute 36 is provided at the bottom thereof, and has a discharge port 35 opened at one end (lower left side) inside the washing drum 20. The cover 30 is also provided with a wash water supply pipe 37 for washing sand and a discharge port 38 for discharging sand. Furthermore, the cover 31 on the outlet side includes a supply pipe 39 that supplies cleaning water to prevent clogging of the dehydration screen cylinder 10 and a supply pipe 40 that supplies cleaning water to the residue in the dehydration screen cylinder 10. It is provided.

Next, the operation of the above configuration will be explained. Now, the outer drum 1 is being rotated in a predetermined direction by a chain stretched on the sprocket 5, and when the sludge is thrown into the inlet side of the washing drum 20 from the sludge supply port 32, the sludge is fed into the washing drum 20. Cleaning water from the cleaning water supply pipe 34 is sprayed on. The rotation of the washing cylinder 20 and the baffle plate 25 provided on the inner wall of the washing cylinder agitate the residue while it is immersed in the washing water, thereby efficiently removing deposits such as sand from the residue.

[0016] The residue and peeled off deposits are removed from the washing cylinder 10.
The sedimentary deposits (sand) fall into the outer shell 1 from the openings of the separation screen 24, and the scum and floating deposits fall from the end of the separation screen 24 to the opening 8. The water is then transferred to the dewatering screen cylinder 10.

The residue in the dehydration cylinder 10 rolls on the bottom of the dehydration cylinder 10 on the rotational direction side, and is moved toward the exit side of the dehydration screen cylinder 10 by the action of the screw blades 15. During this movement, washing water from the supply pipe 40 is sprayed, and the dirt attached to the residue is washed away.

The cleaning water sprayed on the scum and the cleaning water containing floating deposits is sent to a sewage treatment facility (not shown) through a drain 41 provided below the dewatering screen body 10 and is treated therein. . Further, the residue discharged from the outlet of the dehydration screen body 10 is sent from the residue discharge port 42 to a dehydrator (not shown), dehydrated, and then disposed of by incineration or the like.

[0019] Thread-like residue is present in the residue in the dewatering screen cylinder 10, but most of such residue is in the form of lumps formed by rolling of the residue in the dehydration screen cylinder. Although they are intertwined, some of them may jump out from the gaps between the bars 13. However, the protruding filamentous residue is blocked by the entanglement prevention plate 13' and is prevented from becoming entangled with the bar 13. Therefore, when the dewatering screen body 10 rotates and is lifted upward, the filamentous residue that has flown out falls due to its own weight and the action of the washing water from the supply pipe 39.
It is entangled with and removed by the rolling lump-like residue, and clogging of the dewatering screen cylinder 10 is effectively prevented.

The sand in the outer shell 1 is moved by the screw blades 11 in the direction shown by the solid arrow A, that is, toward the sludge supply side. During this movement, the cleaning water supplied from the supply pipe 37 is flowing toward the other end of the outer shell 1 (see dashed line B in Figure 1), so the sand and cleaning water come into countercurrent contact and are cleaned. Furthermore, since the sand is disturbed by the weir plate 12, cleaning of the sand is further promoted. The washed sand is removed by raking blade 6
is transferred to the discharge port 38 by. Note that the waste water that has washed the sand is discharged from the drain port 41 together with the waste water that has washed the residue.

[0021] In the present embodiment, the washing water is sprayed onto the washing cylinder 20, so that the washing cylinder 20 can wash the scum with water, and remove the deposits from the scum without having to rotate the rotor as in the conventional case. can be peeled off.

[0022]

Effects of the Invention Since the apparatus of the present invention sprays washing water onto the washing drum, the scum can be washed with water within the washing drum, and deposits can be efficiently peeled off from the scum. Further, when the washing water is sprayed from the upper part of the chute that supplies the residue, the washing water is uniformly sprayed on the residue, and the removal of deposits can be further promoted.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view showing an embodiment of the device of the present invention.

[Explanation of symbols]

1 Outer cylinder 10 Dewatering screen cylinder 20 Washing cylinder 34 Washing water supply pipe (washing water spraying means) 36 Chute

Claims (2)

[Claims] Claim 1: A washing cylinder is provided in an outer cylinder which is horizontally suspended so as to be rotatable so as to rotate together with the outer cylinder, and a dewatering screen cylinder is provided on the outlet side of the washing cylinder to rotate together with the outer cylinder. The dewatering screen cylinder receives the disturbed residue thrown into the washing cylinder, dehydrates it while washing by spraying washing water, and discharges it by a screw blade provided on the inner wall of the dehydrating screen cylinder. A sludge washing device characterized in that the washing device is provided with a washing water spraying means for spraying washing water onto the sludge put into the washing drum. 2. The cleaning water spraying means as claimed in claim 1, wherein the washing water dispersing means is provided at the upper part of a chute through which the sludge is introduced into the washing cylinder.
The residue cleaning device described.