JP3341077B2 - Roller screen - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a screen for forming an object to be treated, such as sludge or construction waste soil, into a lump having a certain size or less, and more particularly to a roller screen having a screen portion formed by rollers. .

[0002]

2. Description of the Related Art For example, in a sludge treatment plant, a large amount of sludge separated from water is discharged, and this sludge contains a large amount of water. Such water-rich sludge is also generated in large quantities when the river is dredged.

[0003] In order to treat such sludge, its water must first be removed. This is because if water is present, not only is it difficult to handle it, but also the processing facility must be large. In order to treat this sludge in any form, it is necessary to make the size or particle size uniform. This is because it is necessary to facilitate the handling and the mixing and kneading.

As an apparatus for treating sludge as described above, there is, for example, a "sludge treatment facility" proposed in Japanese Patent Application Laid-Open No. 9-323097. As shown in FIG. 5, the purpose of this facility is to provide a general-purpose sludge treatment facility capable of treating sludge even when the mixed state of dust and mud having different particle sizes is different. "A vibrating screen for separating dirt and mud in sludge, a cyclone for separating fine and coarse particle sludge separated by the vibrating screen, and an ultra- A high-speed coagulating sedimentation tank, and a dehydrating and drying apparatus for dewatering the coagulated sludge of the ultra-high-speed coagulating sedimentation tank and the coarse particle size sludge.

In the conventional equipment shown in FIG. 5, water containing sludge is pumped up, separated or separated by a vibrating screen, and dried by air or low-temperature exhaust gas in a final stage dehydration / drying apparatus. Was done,
It has become very large. In addition, the conventional equipment shown in FIG. 5 is considered to be very costly because a cyclone or a bag filter that requires constant maintenance is employed.

[0006] By the way, the sludge generated as a sewage treatment plant or construction residual soil contains a large amount of water, but is not sludge like sludge just dredged.
Often it is stiff enough to maintain its shape. It is known that quicklime is used as a method for drying such sludge.

[0007] Since quick lime generates heat by reacting with water, sludge is dried using this heat generation. Also, quicklime becomes slaked lime by reacting with water, and this slaked lime is also used to prevent acidification by spraying on the soil. It is also used as an improving material.

[0008] Based on the above circumstances, the present inventors have studied a sludge treatment apparatus. As a result, it is sufficient to use a so-called roller screen even if the apparatus is not a large-sized facility as shown in FIG. He concluded that there was. So, when we worked on improving the roller screen to treat sludge containing a lot of water and construction surplus soil, a new problem arose.

That is, the roller screen has a large number of protrusions provided on a shaft to be rotated, and the respective shafts are arranged so that these protrusions enter alternately. Naturally, there are large objects that do not pass through the screen, and this remains until the end of the roller. It has been found that a large object to be processed must be separately processed to be finished into a small one, and it takes a lot of time and effort.

The present inventors have conducted various studies on how to improve a roller screen for treating sludge and construction remains, and as a result, completed the present invention.

[0011]

SUMMARY OF THE INVENTION The present invention has been made on the basis of the above circumstances, and an object of the present invention is to provide a roller screen capable of preventing large unseparated lumps from being left. It is.

That is, an object of the first aspect of the present invention is to provide a roller screen capable of assisting the crushing of an object to be processed by the roller screen so that a large lump is not left.

Another object of the present invention is to provide a roller capable of crushing and discharging a large lump sent at the end of the machine frame and reloading an object to be processed. To provide a screen.

The object of the third aspect of the present invention is to achieve the object of the first or second aspect of the present invention, and furthermore, an object to be treated such as sludge contains a large amount of water. Even so, it is an object of the present invention to provide a roller screen that can surely feed into a drying processing section.

[0015]

Means for Solving the Problems In order to solve the above problems, first, means according to the first aspect of the present invention will be described with reference numerals used in the following description of embodiments. "Object to be treated 90 such as sludge or construction surplus soil"
With a number of parallel rollers 20 rotating in a certain direction.
By placing above the finish a certain following nodular object in the object to be treated as a constant following nodular material is dropped from between the rollers 20, drying the nodular of the workpiece 90 by the machine conveyor In the roller screen 100 to be sent to the processing section 40, the crushing auxiliary block 50 is suspended over a number of parallel rollers 20 so as to be able to swing in a direction parallel to the transport direction. ,
The roller screen 100 "is characterized in that the lower end 53 of the crushing auxiliary block 50 is slightly higher than the upper surface of the roller 20.

That is, as shown in FIGS. 1 and 2, the roller screen 100 according to the first aspect has a machine frame 1.
By feeding the object 90 through the inlet 11 provided at the upper end of the roller 0, the object 90 is transported in the direction of the arrow shown in FIG. It is made into a baby-boom shape and dropped on a conveyor. Workpiece 9 dropped on this conveyor
1 is sent to a drying processing unit 40 provided on the right side of FIG. 1 and kneaded with quicklime in the drying processing unit 40, and a processed material discharge port 70 provided on the lower right side of the machine casing 10 in the drawing. From there it is sent to another conveyor or carrier.

[0017] Each roller 20, there is formed a plurality of projections 22 on the rotary shaft 21, these projections 22 Ru disposed <br/> each other Ini交 each other, i.e. so also parallel When the rotating shaft 21 is rotated by a drive motor (not shown) or the like, the object 90, which is put in a large lump, is crushed and sent to the left in FIG. Since the projections 22 on the respective rotating shafts 21 enter each other to form a gap, the processing target 90 smaller or smaller than the gap falls on the lower conveyor. It becomes.

As each of the rollers 20 rotates, a large lump of the input object 90 is crushed by the projections 22 into a certain size. Processing object 90 as it is
May be sent to an outlet 12 formed on the left end side of FIG. Therefore, in the roller screen 100 of the first aspect, the crushing auxiliary block 50 plays an active role.

As shown in FIGS. 1 and 2, the crushing auxiliary block 50 is formed by stacking a large number of substantially square block plates 51, and only the upper part thereof is supported by a pivot 52. That is, the crushing auxiliary block 50 is suspended from the machine frame 10 by the pivot 52, and the lower end 53 is always located immediately below the roller 20 and swings with respect to the pivot 52. It is free to move.

The workpiece 90 in the form of a lump that has not been crushed by the rollers 20 at the front stage is sent by the rollers 20 at the next stage, thereby forming the lower end of the crushing auxiliary block 50 described above. Abuts 53. Since each of the block plates 51 constituting the crushing auxiliary block 50 is a heavy material formed of an iron plate or the like, the processing object 90 abutting on the lower end 53 of the crushing auxiliary block 50 has a feeding force of each block plate 51. And the projections 22 of each of the rotating block plates 51 are crushed.
At this time, since the crushing assist block 50 can swing around the pivot 52 to allow the workpiece 90 to escape, no excessive force is applied to each block plate 51.

In the roller screen 100 of the embodiment to be described later, since there are a plurality of auxiliary crushing blocks 50, the crushing of the processing object 90 which is a large lump is surely performed. . The workpiece 9 crushed by these crushing auxiliary blocks 50
0 is further crushed by each roller 20 and falls on the belt conveyor 30 from between the rollers 20.

The belt conveyor 30 transports the workpiece 90 toward a drying section 40 provided on the right side of FIG. 1. In the drying section 40, the drying of the workpiece 90 is performed. Processing is performed. Belt conveyor 30
Is located in the cover of the drying section 40, and the kneading screw 42 is rotating on the upper side thereof.
The processing object 90 sent into the inside is kneaded or stirred by the kneading screw 42.

The drying section 40 is provided with a quick lime supply device 41 for supplying quick lime to the inside of the cover, and supplies quick lime to the object 90 which is kneaded or stirred by the kneading screw 42. Is done. The quicklime is stirred by the kneading screw 42 while reacting with the water in the processing object 90, and the drying and improvement of the processing object 90 are performed. The object 90 to be processed
However, in the case where does not require active drying, for example, in the case of construction surplus soil, the supply of quicklime from the quicklime supplier 41 is stopped.

As described above, the processing object 90 processed in the drying processing section 40 is transferred from another processing object discharge port 70 provided at the lower right end of the roller screen 100 in FIG. It is discharged toward etc. On the other hand, from the discharge port 12 provided at the left end of the roller screen 100 in FIG.
The processing object 90 that has not been crushed by the crushing auxiliary block 50 and the foreign matter contained therein are discharged.

Therefore, the roller screen 100 according to the first aspect of the present invention performs the sorting or separation of aligning the workpiece 90 with a finer one, thereby facilitating the processing in the drying processing section 40 and, of course, the crushing auxiliary block. By the existence of 50, sorting of the processing object 90 can be performed more reliably.

[0026] Now, in order to solve the above problem, means of adopting the invention according to claim 2, likewise, an object to be processed 90 such as "sludge or construction waste soil, a large number of parallel rotating in a predetermined direction by placing on the roller 20, before
Each roller constant following nodular material object in serial processing object
Is dropped from between 20, a roller screen 100 to send the nodular of the workpiece 90 by the machine conveyor to the drying unit 40, juxtaposed rollers 2
A roller screen 100, characterized in that a crushing device 60 is arranged at the downstream end side in the transport direction of 0, and the crushing device 60 crushes the workpiece 90 that has not dropped from between the rollers 20. It is.

That is, the roller screen 100 according to the second embodiment is different from the roller screen 100 according to the first embodiment in that the roller screen 100 includes the auxiliary crushing block 50. A crusher 60 is provided at the end of the roller 20 for crushing the workpiece 90. Other configurations are substantially the same as those of the roller screen 100 of the first aspect.

The crushing device 60 is a so-called crusher, which has a built-in device for crushing the object 90 to be processed. The crushing device is similar to the roller 20 described above. Or a pressing plate for forcibly pressing the object 90 to be crushed. And this crushing device 60
The object 90 to be crushed into small pieces is re-introduced from the inlet 11 of the roller screen 100 by another device (not shown).

Therefore, in the roller screen 100 according to the second aspect, most of the objects to be processed 90 are made large enough to be processed in the drying processing section 40.
The processing of the processing object 90 is surely performed.

[0030] In order to solve the above-mentioned problems, the means adopted by the invention according to claim 3 is based on claim 1 or claim 2.
Is that the conveyor is a screw conveyor 31.

That is, the roller screen 100 according to the third aspect is configured such that the belt conveyor 30 is formed into a screw conveyor 31 on the assumption that the object 90 to be processed contains a large amount of moisture and is sticky. Accordingly, the processing target 90 containing a large amount of water can be reliably transported to the drying processing unit 40 side.

Therefore, in the roller screen 100 according to the third aspect, the processing target 90 having a large amount of water can be forcibly fed to the drying processing unit 40 side by the screw conveyor 31, so that the processing in the drying processing unit 40 can be performed. It can be done reliably.

[0033]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a roller screen according to a first embodiment of the present invention; FIG. 3 shows the roller screen 100 of Example 2 in FIG. 3, and FIG.
Are shown, and each embodiment will be described below in order. In addition, since the members denoted by the same reference numerals in each embodiment are common, only the members described once are denoted by the reference numerals in the respective drawings, and the subsequent description is omitted. (Embodiment 1) FIGS. 1 and 2 show a roller screen 100 according to a first embodiment.

The roller screen 100 of the first embodiment
Is a structure in which each member is attached to the machine frame 10.
An input port 11 for inputting 0 is formed. on the other hand,
Those that could not be processed in the input workpiece 90 are:
The processed object 90 discharged from the discharge port 12 provided on the left side in FIG. 1 and processed passes through the drying processing unit 40 provided on the right end side in FIG. It is configured to be discharged from the processed material discharge port 70.

At the approximate center of the roller screen 100, the entrance 11 of the machine frame 10 is
A substantially horizontal conveyance path extending from the discharge port 12 to the discharge port 12 is formed. As shown in FIG. 2, each roller 20 is formed by integrally forming a large number of protrusions 22 on one rotating shaft 21. The rotating shaft 21 of each roller 20 is rotated by a driving motor or the like. By doing so, the processing target object 90 input from the input port 11 is sent out in the direction indicated by the arrow in FIG. Since the projections 22 of the rollers 20 are alternately inserted into each other when the workpiece 90 is sent out, the small ones of the workpieces 90 are dropped downward while being selected, and the large This is for crushing the lump of the workpiece 90 in the middle of transportation.

A belt conveyor 30 is disposed below the conveying path formed by the rollers 20.
The belt conveyor 30 converts the received workpiece 90 into
This is sent to the drying processing unit 40 arranged on the right side of FIG. 1. The drying section 40 has a case for accommodating a kneading screw 42, and a quick lime supply device 41 for selectively supplying quick lime is provided in the case. Of course, this drying section 40
The front end of the belt conveyor 30 is stored in the case, and a processed material discharge port 70 is formed below the case.

The drying section 40 includes a belt conveyor 3
When the object to be treated 90 transported by 0 contains a large amount of water, the object 90 is dried, and the drying utilizes the water of quick lime and the heat of reaction. In other words, quick lime is supplied from the quick lime supply device 41 to the object 90 containing a large amount of water, and is discharged from the post-processing material discharge port 70 after kneading by the kneading screw 42. The quicklime reacts with the water in the workpiece 90 to generate heat, thereby drying the workpiece 90.

In the roller screen 100 according to the first embodiment, two crushing auxiliary blocks 50 are swingably suspended on the roller 20 described above. As shown in FIG. 2, each of the crushing assist blocks 50 is formed by stacking a large number of block plates 51 made of a heavy and hard material such as an iron plate.
By pivoting on each roller 20, each roller 20 can swing freely.

Each of the crushing assist blocks 50 pushes back the workpiece 90 as a large lump toward the input port 11 side, whereby crushing is performed by rotation of each projection 22 constituting each block plate 51. Is to do so. Of course, each of these crushing auxiliary blocks 50 must not interfere with the roller 20 and must not penetrate a large lump of the object to be processed 90. Therefore, as shown in FIG. And is swingable with respect to the machine frame 10 as described above.

It should be noted that if the crushing assist block 50 is rotated with excessive force, it will give a large vibration to the entire roller screen 100 or cause noise, so that the rotation of each crushing assist block 50 is prevented. As shown in FIG. 1, a stopper 54 is provided at an appropriate location such as the machine frame 10. (Embodiment 2) FIG. 3 shows a roller screen 100 according to Embodiment 2;
00 corresponds to claim 3 in which claim 1 is cited.

The roller screen 100 of the second embodiment
The difference from the first embodiment is that the belt conveyor 30
And a hopper 80 for stably feeding the object 90 into the inlet 11.

The screw conveyor 31 has a spiral-shaped feed blade on its rotation axis, whereby the workpiece 90 containing a large amount of water can be reliably fed to the drying section 40. It is like that.

The hopper 80 is provided so as to cover a large space at the upper end of the machine frame 10, and a large amount of the objects 90 to be processed at once are transferred to the roller screen 10 by the hopper 80.
It has a shutter 81 for inserting the shutter 81 while adjusting it to an amount corresponding to the capacity of 0. This shutter 8
Numeral 1 is opened and closed by an opening / closing cylinder 82 provided below. Of course, such a hopper 80
It is also provided for the roller screen 100 shown in FIG. (Embodiment 3) FIG. 4 shows a roller screen 100 according to the third embodiment.
Relates to claim 2 and claim 3 to which this claim 2 is cited.

The roller screen 100 of the third embodiment
Is the screw conveyor 3 instead of the belt conveyor 30
Example 1 in the point that the
This is different from that of the second embodiment only in that the crushing device 60 is provided.

The crushing device 60 crushes the workpiece 90 sent to the final end of each block plate 51, and employs a general crusher. You. That is, the crushing device 60 may include the above-described rollers 20 or may include a crushing plate that swings periodically with respect to the fixed wall. .

The roller screen 100 in each of the above embodiments can be selectively used in accordance with the condition of the workpiece 90 to be processed. The point of proper use is the screw conveyor 31 and the crushing auxiliary block 50.
Or which of the crushing devices 60 is to be used. That is, in the roller screen 100 shown in FIG. 4, the belt conveyor 30 may be used as it is without using the screw conveyor 31, or the respective crushing auxiliary blocks 50 may be omitted and used.

[0047]

As described in detail above, first, according to the first aspect of the present invention, the object to be treated 9 such as sludge or construction surplus soil is described.
0, a number of parallel rollers 2 rotating in a certain direction
By placing on the 0, the finishing one constant following nodular object in the object to be treated as a constant following nodular material is dropped from between the rollers 20, the nodular of the workpiece 90
In roller screen 100 in which the through-flight of the conveyor to send the drying unit 40, the number of parallel
The crushing auxiliary block 50 is suspended on the roller 20 so as to be able to swing in a direction parallel to the transport direction, and the lower end 53 of the crushing auxiliary block 50 is
0 is slightly higher than the upper surface ", which has a structural feature. In the invention according to claim 2," the object 90 such as sludge or construction soil is rotated in a certain direction. by placing on a number of juxtaposed rollers 20, the constant following nodular material object in the object to be processed is dropped from between the rollers 20, drying the nodular of the workpiece 90 by the machine conveyor in roller screen 100 to send the parts 40, parallel
A crushing device 6 is provided at the downstream end side in the transport direction of the arranged rollers 20.
0, and each of the rollers 2
The object to be processed 90 that did not fall from the zero is crushed "has a feature in its configuration, thereby assisting the crushing of the object to be processed by the roller screen so as not to leave a large lump. In addition, the large lump sent at the end of the machine frame can be discharged while being crushed, and the roller screen 100 capable of re-introducing the object to be processed can be provided.

Further, in the invention according to claim 3, the roller screen 100 according to claim 1 or 2 is provided.
Has a feature in its configuration that "the conveyor is a screw conveyor 31", and thereby exhibits the same effect as the roller screen 100 of claim 1 or 2 and contains a large amount of moisture. Object 9
Even if the value is 0, the roller screen 100 can surely be conveyed to the drying section 40.

[Brief description of the drawings]

FIG. 1 is a side view of a roller screen according to Embodiment 1 of the present invention.

FIG. 2 is a front view of the roller screen shown in FIG. 1;
It is the front view which showed the line part in the right half.

FIG. 3 is a side view of a roller screen according to Embodiment 2 of the present invention.

FIG. 4 is a side view of a roller screen according to Embodiment 3 of the present invention.

FIG. 5 is a schematic configuration diagram showing a conventional sludge treatment facility.

DESCRIPTION OF SYMBOLS 100 Roller Screen 10 Machine Frame 11 Inlet 12 Outlet 20 Roller 21 Rotary Axis 22 Projection 30 Belt Conveyor 31 Screw Conveyor 40 Drying Processing Unit 41 Quicklime Supply Unit 42 Kneading Screw 50 Crushing Auxiliary Block 51 Block Board 52 Axis 53 Lower end 54 Stopper 60 Crusher 70 Treated material outlet 80 Hopper 90 Treated material

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-54-73355 (JP, A) JP-A-7-256208 (JP, A) Fully open 57-199085 (JP, U) Really open 1962 106684 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) B07B 1/00-15/00

Claims (3)

(57) [Claims] 1. An object to be treated such as sludge or construction surplus soil,
By placing on the number of juxtaposed rollers which rotates in a predetermined direction, wherein one constant following nodular object in the object to be processed is dropped from between the rollers by the nodular of the object machine conveyor In the roller screen to be sent to the drying processing unit, along with suspending the crushing auxiliary block so as to be able to swing in a direction parallel to the transport direction on the plurality of parallel rollers, the crushing auxiliary block A roller screen having a lower end slightly above the upper surface of the roller. 2. An object to be treated, such as sludge or construction surplus soil,
By placing on the number of juxtaposed rollers which rotates in a predetermined direction, wherein one constant following nodular object in the object to be processed is dropped from between the rollers by the nodular of the object machine conveyor In a roller screen to be sent to the drying processing unit, a crushing device is arranged at the downstream end side in the transport direction of the parallel rollers, and the crushing device crushes the workpiece that has not dropped from between the rollers. A roller screen characterized by the following. 3. The roller screen according to claim 1, wherein the conveyor is a screw conveyor.