JPH04322755A - Residue scrubber - Google Patents

Abstract

PURPOSE:To smoothly transfer residue to a dehydration screen drum from a washing drum provided to the inside of an external drum by providing a truncated conical guide cylinder whose one end is welded to the inner wall of the external drum and the other end is welded to the inlet of the dehydration screen drum. CONSTITUTION:A washing drum 20 is provided to the inside of a rotated external drum 1 and also a dehydration screen drum 10 having a diameter nearly equal to the washing drum 20 is provided to one end of the external drum 1. Residue generated in the screen device of a sewage treating plant or the like is introduced into this washing drum 20, rubbed and washed. Then residue is washed and dehydrated in the dehydration screen drum 10. In this case, a truncated conical guide cylinder 26 is provided whose one end is welded to the inner wall of the external drum 1 and the other end is welded to the inlet of the dehydration screen drum 10. As a result, residue is smoothly transferred to the dehydration screen drum 10 from the washing drum 20.

Description

[Detailed description of the invention]

0001

[Industrial Field of Application] The present invention relates to a sludge cleaning device for cleaning sludge generated when sewage is screened in a sewage treatment facility such as a sewage treatment plant, and in particular, it relates to a sludge cleaning device that cleans sludge generated when sewage is screened in a sewage treatment facility such as a sewage treatment plant. This item relates to a device that allows for smooth movement of residue.

0002

2. Description of the Related Art Conventionally, this type of sludge cleaning apparatus has a washing cylinder which is provided in an outer cylinder horizontally suspended so as to be rotatable, which rotates together with the outer cylinder and has a rotor made of a rubber ball or the like. , a dewatering screen cylinder that rotates together with the outer cylinder is provided on the outlet side of the washing cylinder (for example, the
0-51852, Utility Model Application Publication No. 61-106348).

[0003] Therefore, when mustard sludge is put into one end (inlet side) of the washing drum, the sludge is disturbed and washed by the rolling motion of the rotor as the washing drum rotates, and it sticks to the sludge. Removes dirt, sand, and other deposits. Among the detached deposits, sedimentary substances such as sand are discharged into the outer shell through a separation screen installed at the other end (outlet end) of the washing drum, and the cleaning material supplied from one end of the outer drum is removed. It comes into countercurrent contact with water and is discharged into the outer shell. On the other hand, sludge and floating contaminants are discharged into the dehydration screen shell, which has a smaller diameter than the outer shell, where the floating deposits are entrained in the wash water through the openings of the dehydration screen shell. The discharged and 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, since the diameters of the outer shell and the dewatering screen barrel are different, the sludge that has been massaged in the washing barrel is separated from the outer shell and the dewatering screen. There was an inconvenience that the dewatering screen remained in the stepped portion formed between the outer shell and the dewatering screen shell, making it difficult to move smoothly from the outer shell to the dewatering screen shell.

[0005]The present invention has been made to solve the above-mentioned problems, and the object thereof is to provide a method for smoothly transferring the residue from the outer shell to the dewatering screen shell. The purpose is to provide cleaning equipment.

[0006]

[Means for Solving the Problems] In order to achieve the above object, the device of the present invention is provided within a rotatably horizontally suspended outer shell, concentrically with the outer shell, and configured to rotate together with the outer shell. A washing cylinder is provided in the washing cylinder, and a dewatering screen cylinder is provided on the outlet side of the washing cylinder, which rotates together with the outer cylinder and has approximately the same diameter as the washing cylinder, and the dehydrating screen cylinder is provided with a dewatering screen cylinder that is fed into the washing cylinder. In a cleaning device that receives disturbed sludge, dehydrates it while washing by spraying washing water, and discharges the washed and dehydrated sludge through a screw blade provided on the inner wall of the dehydration screen cylinder. The present invention is characterized in that a truncated conical guide cylinder is provided between the dewatering screen cylinder and the dewatering screen cylinder from the inner wall of the outer cylinder to the inlet side of the dehydrating screen cylinder.

[0007]

[Operation] In the above structure, the residue that has been massaged in the washing cylinder is guided by the guide member and transferred from the outer cylinder to the inside of the dewatering screen cylinder.

[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 described above, and therefore, the water level in the outer cylinder 1 is regulated by the green 8' of the opening 8. Ru. Also, outer body 1
A screw blade 11 is provided on the inner wall of the screw blade, and weir plates 12, 12 are installed at several places on this screw blade.
...is provided.

The dewatering screen body 10 is constructed by maintaining a predetermined spacing 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, . . . are fixed by welding, and are formed so that by rotating the dehydration screen cylinder 10 in one direction, the residue therein can be transferred toward the outlet end of the dehydration screen cylinder 10.

The washing cylinder 20 is a washing cylinder that does not have a rotor and is capable of massaging the residue, which the applicant proposed earlier. A plurality of baffle plates 24, 24, . . . are provided at predetermined intervals in the longitudinal direction. The washing drum 20 has a diameter smaller than that of the outer drum 1 and has a length approximately half that of the outer drum 1, and is fixed concentrically to the left side inside the outer drum 1 by a plurality of support members 21, 21, . . . There is. 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 25 is provided.

The guide tube 26 has a truncated conical shape (one end welded to the inner wall on the outlet side of the outer shell 1 and the other end welded around the opening 8 of the end plate 9, that is, on the entrance side of the dewatering screen shell 10).
It is formed into a cone shape.

Covers 30 and 31 are provided on the inlet and outlet sides of the outer shell 1, respectively, and the cover 30 on the inlet side has a sludge supply port 32 and a sludge supply port facing upward at the top. It has a washing water supply pipe 34 provided with a downward deflection plate 33 on a part of the edge of the washing cylinder 20 at the bottom.
A chute 36 having a discharge port 35 opened at one end lower side (lower left side) inside is provided. 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. Due to the rotation of the washing drum 20 and the baffle plate 24 provided on the inner wall of the washing drum, the residue is agitated and rubbed while immersed in washing water, thereby efficiently removing deposits such as sand from the residue. be done.

[0017] The residue and peeled off deposits are removed from the washing cylinder 20.
The sedimentary deposits (sand) fall into the outer shell 1 through the openings of the separation screen 25, and the scum and floating deposits move from the end of the separation screen 25 to the guide tube. 26. The residue in the guide tube 26 is transported to the dewatering screen cylinder 10 through the opening 8, accompanied by the flow of cleaning water supplied from the cleaning water supply pipes 34, 37 (see arrows a and b). During this transfer, in particular, the flow of washing water supplied from the washing water supply pipe 37 acts to lift the scum from below and move it toward the dewatering screen cylinder 10 side. In particular, since the distance between the guide tube 26 and the separation screen 25 is configured to gradually narrow toward the dehydration screen cylinder 10 side, the flow rate of the washing water shown by arrow b increases, and the dehydration of the residue becomes faster. Movement to the screen cylinder 10 is facilitated.

The residue in the dewatering screen cylinder 10 rolls at the bottom of the dehydrating screen cylinder 10 on the rotational direction side, and is moved toward the exit side of the dehydrating 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 wastewater treatment facility (not shown) for treatment through a drain port 41 provided below the dewatering screen body 10. . 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.

[0020] Thread-like sludge is present in the sludge in the dewatering screen cylinder 10, but most of such sludge is in the form of lumps formed when the sludge rolls in the dewatering 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, wash water supply pipe 3
Since the cleaning water supplied from 7 is flowing toward the other end of the outer shell 1 (see arrow B in Figure 1), the sand and cleaning water come into countercurrent contact and are washed, and are further agitated by the weir plate 12. sand cleaning is facilitated. The washed sand is transferred to the discharge port 38 by the raking blades 6. In addition, the wastewater from which the sand has been washed is dehydrated as described above, and the residue is dehydrated through the screen cylinder 1.
0, and is discharged from the drain port 41 together with the wastewater from which the residue has been washed.

In the device of this embodiment, the guide tube 26 is provided at the step between the outer shell 1 and the dewatering screen shell 10, so that the outer shell 1
The residue can be smoothly transferred from the dehydration screen cylinder 10 to the dewatering screen cylinder 10. Moreover, since the washing water is sprayed onto the washing cylinder 20, the washing cylinder 20 can wash the residue with water, and the deposits can be peeled off from the residue without rotating the rotor as in the conventional case.

[0023]

Effects of the Invention Since the apparatus of the present invention is provided with a guide cylinder at the step between the outer shell and the dewatering screen shell, the residue can be smoothly transferred from the outer shell to the dewatering screen shell.

[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 body 10 Dehydration screen cylinder 20 Washing cylinder 26 Guide tube

Claims (1)

[Claims] Claim 1: A washing cylinder is provided concentrically with the outer cylinder in a rotatably horizontally suspended outer cylinder and rotates together with the outer cylinder, and the outer cylinder is provided on the outlet side of the washing cylinder. A dewatering screen cylinder that rotates together with the washing cylinder and has approximately the same diameter as the washing cylinder is provided, and the dewatering screen cylinder receives the disturbed residue thrown into the washing cylinder and washes it by spraying washing water. In the cleaning device, the dewatering screen is removed from the inner wall of the outer shell between the outer shell and the dewatering screen shell, and the washed and dehydrated residue is discharged by a screw blade provided on the inner wall of the outer shell. A sludge cleaning device characterized by having a truncated conical guide tube extending toward the inlet side of the barrel.