JPS592814Y2 - "reactor" - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a filtration device used for filtering liquids such as sludge and human waste to remove solids and the like.

BACKGROUND OF THE INVENTION For the purpose of filtering liquids containing suspended solids such as sludge and raw human waste, a filtration device having a drum-shaped screen arranged so that its axis is horizontal is used.

In such a filtration device, the liquid to be filtered (raw water) is supplied into a continuously rotating filter, the filtrate flows down through the screen, and scum is formed at one end (or both ends) of the screen. It is taken out to the outside through the opening.

A part of the residue forms nodules on the inner circumferential surface of the screen that roll as the screen rotates, and these nodules adhere to the filter, and by peeling off the residue, the clogging of the sufnon is prevented. It functions to eliminate the problem.

Therefore, in order to maintain a stable filtration effect, it is necessary to adjust the amount of raw water supplied so that the amount of sludge supplied and discharged maintain a certain balance, and this regulates the upper limit of the amount of treatment. This is a cause that hinders the improvement of processing capacity.

The purpose of the invention is to provide a filtration device that exhibits a stable filtration effect even when the throughput is significantly increased by forcibly forming appropriate sludge aggregates.

Next, an embodiment of this invention will be described with reference to the drawings.

The drum designated by numeral 1 in FIG. 1 has a disc-shaped end plate 2.
A cylindrical screen 3 is fixed to a cylindrical screen 3, and a ring-shaped guide 4 is attached to one end of the cylindrical screen 3.The screen has a cylindrical shape with one end open, and is arranged so that its axis is horizontal. and is housed in the housing 5.

A drive mechanism 6 including a motor 5 and a speed reducer is attached to the housing 5, and a rotating shaft 7 of the drive mechanism 6 is attached to the housing 5.
The tip of is fixed to the center of the end plate 2.

As a result, the drum 1 is supported by the rotating shaft 7 and can rotate together with the rotating shaft 7 about its axis.

At the bottom of the housing 5, two chambers 9, 10 are formed, which are separated by a partition plate 8 located below the guide body 4.

Further, a nozzle 12 attached to the tip of the raw water supply pipe 11 is arranged inside the drum 1.

This nozzle 12 is designed to spray the raw water to be filtered toward the inner circumferential surface of the screen 3, which is constructed by arranging rods having preferably triangular cross sections in parallel with each other at predetermined intervals. It is intended to supply
The raw water supply position is selected such that the raw water is sprayed when the screen 3, which rotates in one direction, is at the position where it has passed its highest point and begins to descend.

Therefore, the raw water is subjected to a filtration action as the screen 3 descends, and the filtrate passes through the screen 3 and flows down into the chamber 9, but the residue remains on the screen 3 and
continues to rotate.

Then, after passing the lowest point of the rotation of the screen 3, it separates from the screen 3 and forms a nodule, and when this nodule reaches a certain size or more, it is pushed out little by little in the axial direction due to the influence of gravity, and the guide body 4 After exiting the drum 1 through the inner circumferential surface of the drum 1, it falls into the chamber 10 one after another.

The filtrate that has flowed down into the chamber 9 is taken out through the filtrate discharge pipe 13, and the residue that has fallen into the chamber 10 is discharged from the discharge port 14.

Reference numeral 15 indicates a cleaning pipe for spraying cleaning water pumped from the pump 16 onto the screen 3 from the outside when cleaning the screen 3 before shutting down its operation.

Furthermore, a rod-shaped control rod 17 extends into the drum 1 in a direction parallel to its axis.

The control rod 17 may be a simple rod, but preferably has a bearing attached to the shaft 18, as shown in detail in FIG.
The roller 20 is rotatably supported via a cylindrical roller 9, and is mounted at a predetermined position by being attached to a bracket 21 fixed to the housing 5 via a mounting plate 22.

As is clear from FIG. 3, the mounting plate 22 has elongated holes 22.
A long and thin plate with a nut 23 at one end.
The shaft 18 is fixed to the bracket 21 by a bolt 24 which passes through the elongated hole 22a and is screwed into the bracket 21.

Therefore, by loosening the bolt 24, the position of the control rod 17 relative to the bracket 21, that is, the position of the control rod 17 relative to the drum 4, can be freely changed within a predetermined range, and by tightening the bolt 24, the position can be changed. can be fixed to.

As shown in FIG. 3, the control rod 17 is positioned so that it faces the inner circumferential surface of the screen 3, which has started to rise past the lowest point, at an appropriate interval, and supply amount,
Alternatively, it may be finely adjusted depending on conditions such as its properties.

As mentioned above, this position is the position where the filtrate is separated and the residue forms lumps on the screen 3. Therefore, when a certain amount of residue accumulates at the bottom of the screen 3, the residue is controlled. The rod 17 contacts the circumferential surface of the roller 20.

In this state, the roller 20 comes into frictional contact with the inner circumferential surface of the screen 3 through the scum, so it rotates in the opposite direction to the screen 3 at approximately the same peripheral speed, and the scum is formed on the circumferential surface. Wrap around.

That is, a roll of residue is formed with the roller 20 as the core, and this roll rotates at the same circumferential speed while not always being in contact with the inner circumferential surface of the screen 3.

Therefore, the residue adhering to the inner peripheral surface of the screen 3 is
The roller 20 is the core, and the residue is wrapped around the roll by its own adhesiveness, and the excess residue is discharged from the opening of the drum 1 without moving in the axial direction due to the action of gravity.

The roller 20 of the control rod 17 may be a simple pipe-shaped roller with a flat outer circumferential surface, but if the scum is not sufficiently wrapped around the roller 20, a roller 20 with an uneven circumferential surface or a brush-shaped roller may be used. You can also use

As described above, according to this invention, the cleaning action of peeling off the residue that adheres to the inner peripheral surface of the screen due to the rolling of the nodules of the nodules is not the free transfer of nodules, but This is done by semi-forced rotation of a roll of scum centered around a control rod which is located at a distance from the screen near the position where transfer begins and has a sufficiently smaller diameter than the drum.

Since such a roll evenly contacts the entire inner circumferential surface of the rotating screen, the slag is reliably peeled off from the screen, which makes it stable even when the processing amount (raw water supply amount) is increased. filtration becomes possible.

Furthermore, the effect of stripping off the sludge due to the provision of control rods is particularly significant when wedge wires with a triangular cross section are used in combination with screens arranged parallel to each other; It has been confirmed through experiments that a stable filtration effect can be achieved even when the amount is increased by about 50% from the conventional upper limit.

[Brief Description of the Drawings] Fig. 1 is a partial vertical sectional side view of a filtration device according to an embodiment of this invention, Fig. 2 is a partially cutaway side view of a control rod provided in the device, and Fig. 3 is a control rod. FIG. 3 is a front view showing a portion of the rod and drum. 1...Drum, 2...End plate, 3...
...Screen, 4...Guidance body, 5...
...Housing, 6...Drive mechanism, 7...
... Rotating axis, 9, 10... Chamber, 11...
・Raw water supply pipe, 12...Nozzle, 17...
...Control rod, 18...Shaft, 19...
...Bearing, 20...Roller, 21...
...Bracket I, 22...Mounting plate, 24.
·····bolt.

Claims (3)

[Scope of utility model registration request] (1) Arrange a drum with a screen on its circumference so that its axis is horizontal, and supply the liquid to be filtered into the drum while rotating this drum in one direction about its axis. , a device in which the filtrate is passed through the screen and the residue is overflowed from the drum through an opening at the end thereof, and a control rod is provided in the drum and parallel to the axis of the drum; is a transfer of a roll formed of sludge, which is located at a distance from the screen near the position where the screen passes the lowest point during its rotation and begins to rise, and has a sufficiently small diameter compared to the drum. A filtration device characterized by serving as a core. (2) The filtration device according to claim 1, wherein the control rod has a roller that is rotatable around its own axis. (3) The filtration device according to claim 1 or 2, wherein the control rod is supported so as to be able to adjust a distance from the inner peripheral surface of the screen.