JPH0536559Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a sludge agitation device for mixing and agitating sludge and a flocculant.

[Conventional technology]

Generally, when treating sludge, a flocculant is mixed and coagulated to form a cake, and a sludge stirring device is used for this mixing.

As a conventionally used sludge stirring device, there is one described in Japanese Utility Model Publication No. 63-35786. This sludge stirring device consists of a casing that has a sludge input port formed at the upper end and a sludge discharge port formed at the lower end, and a shaft rod that is rotatably supported within the casing via a predetermined drive source. a rotating body in which a plurality of blade plates are arranged at equal central angles along the longitudinal direction of the shaft rod, the blades being in contact with the end plates at both ends; It consists of a stirring body with a large number of stirring plates protruding from the circumferential surface of a shaft pin that is rotatably supported between both end plates at a higher speed than the rotating body.

This sludge stirring device is of the so-called batch type and is used to stir the sludge each time, and the amount of sludge equivalent to one batch is put into a casing together with a flocculant, and the rotating body and stirring Due to the rotation of the body, the coagulant and the flocculant are well mixed and stirred in the casing and then taken out from the discharge port.

[The problem that the idea aims to solve]

However, as described above, in the conventional sludge agitating apparatus that agitates sludge once at a time, the processing is performed in batches, so there is a limit to the amount of sludge that can be processed. In particular, it is necessary to empty the inside of the casing each time, which not only complicates the operation but also requires a lot of time.

The object of the present invention is to provide a sludge agitation device that can overcome the problems of the conventional devices described above and increase the throughput by performing continuous agitation instead of batchwise agitation.

[Means to solve the problem]

In order to achieve the above object, the sludge stirring device according to claim 1 has a sludge inlet formed at one end of the stirring tank and an outlet at the other end, and the sludge is transferred from the inlet to the outlet. A plurality of stirring bodies each having stirring blades that rotate in the same direction so as to move the sludge are disposed in each of the stirring tanks at intervals along the moving direction of the sludge, and each stirring blade of the stirring body is It is characterized by being formed into a comb-teeth shape that complements the stirring blades of adjacent stirring bodies.

The sludge agitation device according to claim 2 is characterized in that the bottom wall of the agitation tank is reciprocated along the direction of sludge movement.

[Effect]

According to the sludge stirring device according to claim 1 having the above-described configuration, the sludge is continuously moved from the input port to the discharge port while being kneaded by the rotation of the stirring blades and is discharged. processing can be performed.

Moreover, according to the sludge stirring device of claim 2,
The bottom wall of the stirring tank reciprocates and applies shaking force to the sludge, further improving stirring efficiency and
Sludge can be moved smoothly without bridging.

〔Example〕

The present invention will be explained below with reference to embodiments shown in the drawings.

1 and 2 show embodiments of the sludge stirring device of the present invention in different operating states, and FIG. 3 shows the shape of the stirring blades.

As shown in FIGS. 1 and 2, the sludge stirring device includes a stirring tank 2 disposed inside a casing 1,
It has a plurality of stirring bodies 3 disposed within this stirring tank 2. The casing 1 is formed into a rectangular parallelepiped shape, and a sludge chute 4 is formed at the right end of the bottom wall 1A. The stirring tank 2 is
It is installed in the casing 1 so as to extend in the longitudinal direction, and an opening 5 that projects upward from the casing 1 is formed at the left end thereof, and this opening 5 is used as a sludge inlet. .

Almost the entire bottom of the stirring tank 2 has an opening 2.
In the casing 1, a plate-shaped horizontally elongated slide body 6 facing directly below the opening 2A is disposed so as to reciprocate in the horizontal direction, which is the direction of movement of sludge. This slide body 6
constitutes the floor plate of the stirring tank 2, and is adapted to hold the sludge introduced into the stirring tank 2.
When the slide body 6 moves to the left, the right side of the slide body 6 becomes a sludge discharge port 7 communicating with the chute 4 of the casing 1.

The reciprocating movement of the slide body 6 is carried out by a rotating body 8 that is mounted on the upper wall 1B of the casing 1 and rotated by a drive source such as a motor. For this reason, one end portions of crank rods 9 and 10 are pivotally supported on the rotating body 8 and slide body 6, respectively, by pins 9A and 10A. On the other hand, a bracket 11 is attached to one side wall 1C of the casing 1,
A central portion of a crank arm 12 is pivotally supported on this bracket 11 by a pin 12A. The other ends of the crank rods 9, 10 are attached to pins 9B, 10 at both ends of the crank arm 12.
It is supported by B. In order to support the slide body 6 in a reciprocating manner, a plurality of guide rollers 13 are provided in the lower part of the casing 1 so as to roll into contact with the lower surface of the slide body 6.

The plurality of stirring bodies 3 are arranged at intervals in the direction of sludge movement in the stirring tank 2, and each stirring body 3 is rotatably supported. Each stirring body 3 includes a rotating shaft 14 and four wheels attached to the rotating shaft 14 at equal intervals of 90 degrees.
It is provided with a plate-shaped stirring blade 13. The rotation of each stirring body 3 is performed synchronously with the rotation of the rotary body 8 by driving a drive source that rotates the rotary body 8.
The rotating direction of each stirring blade 13 is the direction of the arrow (counterclockwise) in which the sludge is moved from the input port 5 to the discharge port 7.

Details of the stirring body 3 are shown in FIG.

A sprocket 15 is fitted to one end of the shaft 14 of each stirring body 3, respectively. Each sprocket 15 is connected to the output shaft (not shown) of the drive source by a chain 16, so that the rotating shaft 14 of each stirring body 3 rotates in the aforementioned direction. In the axial direction of the rotating shaft 14, the stirring blades 13 attached to each rotating shaft 14 are arranged in series so that a plurality of stirring parts 13A that largely protrude from the rotating shaft 14 in the radial direction are spaced apart from each other. A comb-like recess 13B is formed between the parts 13A, which protrudes only slightly from the rotating shaft 14 in the radial direction and is slightly wider than each stirring part 13A.

Then, the rotating shafts 14 of a pair of adjacent stirring bodies 3
The interval therebetween is longer than the radial length of the stirring section 13A, and shorter than twice the length of the stirring section 13A. Furthermore, a pair of adjacent stirring bodies 3
In this case, the positions of the stirring part 13A and the recessed part 13B are reversed in the axial direction. Therefore, the stirring blades 13 of each stirring body 3 are connected to the respective stirring portions 1.
3A is loosely fitted into each recess 13B of an adjacent stirring body 3 with a minute interval, and each stirring blade 13 is complementary to the stirring blade of an adjacent stirring body 3. Furthermore, the rotating shaft 1 of each stirring body 3
4 rotate in the same direction, the intersection parts of the stirring blades 13 of adjacent stirring bodies 3 rotate in opposite directions, one clockwise and the other counterclockwise. can be sufficiently kneaded.

Next, the operation of this embodiment having the above-described configuration will be explained.

To drive the sludge stirring device, a drive source is driven. Then, the stirring blades 13 of each stirring body 3 are
The slide plate 6 reciprocates in the horizontal direction while rotating in the counterclockwise direction shown by the solid arrow in FIGS. 1 and 2. In this state, the sludge and flocculant are transferred from the inlet 5 into the stirring tank 2 as shown by broken line arrows in FIGS. 1 and 2. Then, the introduced sludge flows through the stirring blades 13 of each stirring body 3.
The sludge and the flocculant are mixed together, but since the stirring blades 13 are configured to complement the adjacent ones as described above, sufficient mixing and agitation of the sludge and the flocculant is performed. While this mixing and stirring is being performed, the sludge moves rightward in FIGS. 1 and 2 due to the rotational force of each stirring blade 13 of each stirring body 3. On the other hand, since the slide plate 6 reciprocates during mixing and stirring and moving the sludge, the shaking force due to this reciprocating action acts on the sludge, resulting in better mixing of the sludge and also causing sludge bridging. sludge moves smoothly. The sludge that has reached the right end of the slide body 6 is
moves to the left as shown in Figure 2 and exits the outlet 7.
When the chute 4 communicates with the casing 1, it falls outside the casing 1 and is collected.

In this way, in the sludge stirring apparatus of this embodiment, since the sludge is stirred while being moved, continuous treatment is possible and the throughput is increased. In addition, this stirring is performed by each stirring blade 13 in the adjacent stirring body 3.
Since this is efficiently carried out due to the special configuration in which the sludge is complemented, the sludge can be sufficiently mixed and stirred even with a small amount of sludge movement, and the entire apparatus can be made compact.

In addition, in the present invention, since the sludge can be efficiently stirred by the stirring blades, it is also possible to omit the slide body 6. In such an embodiment in which the slide body 6 is omitted, the bottom wall of the stirring tank may be closed and a discharge port may be formed at the end of the bottom wall, thereby simplifying the entire apparatus.

In addition, various modifications can be made to the present invention.

[Effect of idea]

As explained above, according to the present invention, the practical effect of being able to stir and mix sludge continuously and satisfactorily can be achieved. In addition,
By reciprocating the bottom wall, the sludge can be stirred and mixed even better.

[Brief explanation of the drawing]

1 and 2 are longitudinal cross-sectional views showing different operating states of the embodiment of the sludge agitation device according to the present invention, and FIG. 3 is a plan view showing details of the stirring body of FIGS. 1 and 2. . 2... Stirring tank, 3... Stirring body, 5... Inlet,
6...Slide body, 6,7...Discharge port, 13...
stirring blade.

Claims (1)

[Scope of Claim for Utility Model Registration] 1) An inlet for sludge is formed at one end of the stirring tank, and an outlet is formed at the other end, and the sludge is moved in the same direction from the inlet to the outlet. A plurality of stirring bodies each having a rotating stirring blade are arranged in the stirring tank at intervals along the direction of sludge movement, and each stirring blade of each stirring body is connected to the stirring blade of an adjacent stirring body. A sludge stirring device characterized by being formed into a comb tooth shape that complements each other. 2) The sludge stirring device according to claim 1, wherein the bottom wall of the stirring tank is configured to reciprocate along the direction of movement of the sludge.