JPS61127000A - Slit roller type dehydrating device - Google Patents

Abstract

PURPOSE:To constitute a slit roller type dehydrating device which has a simple structure and is easily assembled and disassembled, by installing numerous fine through slits for passing filtrate to the surface of plural hollow slit rollers and arranging the rollers in parallel with each other in two rows, upper and lower rows, with minute intervals between them, and then, rotating the rollers in the same feeding direction. CONSTITUTION:Numerous fine through slits 3 are installed to the surface of plural hollow slit rollers 2 and the slit rollers 2 are arranged in parallel with each other in two rows, upper and lower rows, in a filter chamber 1. Minute intervals are provided between each slit roller 2 in the same row in such a way that sludge, etc., cannot drop through the intervals and the rollers 2 are arranged in zigzag with an upward gradient from the entrance 4 of the chamber 1 toward the outlet 5. In addition, the interval between the upper and lower rows is gradually narrowed toward the outlet 5. Dehydrating is performed with such a constitution by rotating the upper side slit rollers 2 counterclockwise and lower side slit rollers 2 clockwise at a uniform speed by means of a driving motor 10. Moreover, filtrate enters into the slit rollers 2 is discharged from discharging pipes through through holes 12.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a slit roller dewatering device used for dewatering sludge in industrial wastewater or sewage, dewatering pulp, and the like.

(Conventional technology) Various dehydrators such as vacuum dehydrators, filter presses, and belt presses have been used to dehydrate sludge in industrial wastewater and sewage, dehydrate pulp, etc. In both cases, the device is large and has a complicated structure, and since it uses a filter cloth, it has the disadvantage that the filter cloth must be replaced frequently to avoid a decrease in filtration speed due to clogging, which reduces the initial cost and running time. There was a drawback that the cost was high. On the other hand, as a dehydrator that does not use a filter cloth, as shown in Japanese Patent Publication No. 53-34346, a cross body consisting of a large number of disk-shaped filter plates and spacers stacked alternately is used to filter the filter between adjacent cross bodies. It is known that the tips of the plates are interlocked with each other so as to protrude into each other to form a transfer body row, and each plate is rotated in the same direction to filter the material to be processed. However, since this dehydrator uses a body made of a large number of laminated thin filter plates, it has a large number of parts, requires a lot of time to assemble and disassemble, has high initial costs, and is difficult to maintain. It had a

(Problems to be Solved by the Invention) The present invention solves the above-mentioned conventional problems, has a simple structure, is free from clogging, is easy to assemble and disassemble, can be manufactured at low cost, and is free from failures. It was completed with the aim of creating a dehydrator with almost no risk of damage.

(Means for Solving the Problems) The present invention provides a plurality of hollow slit rollers each having a large number of fine slits on the surface through which the filtrate passes, which are arranged in two rows, one above the other, with minute gaps between them. At the same time, each slit roller is rotated in the same feeding direction (Embodiment) The present invention will be described in detail below with reference to the illustrated embodiment. (1) is a filtration chamber; (2) is a plurality of hollow slit rollers arranged in two rows vertically inside the filtration chamber (1), and each slit roller (2) is made of a thin steel plate. As shown, the surface has many fine slits (3) through which the filtrate passes. The slit roller (2) of this example is made by winding a punched metal with long holes so that the longitudinal direction of the holes is in the axial direction, but the shape of the slits (3) may be round holes. Alternatively, a slit roller made by winding a wire or a slit roller made by arranging a large number of bars around the circumference of a disk may also be used. Each slit roller (2) is arranged in parallel with a slight upward slope from the entrance (4) to the exit (5) of the filtration chamber (1), with a fine gap between them to prevent sludge from falling. It is preferable that the upper and lower slit rollers (2) are arranged in a staggered manner, and that the interval between the upper and lower parts becomes gradually narrower toward the exit (5).

As shown in Fig. 2, each slit roller (2) is supported by bearings (6) and (7) on the side wall of the filtration chamber (1), and the sprocket (814q) on the outside of the bearing (6)
After rotating the chain (9), connect the slit roller (2) on the population (4) side to the drive motor (10) and rotate it clockwise, each slit roller (2)
are rotated in the same feeding direction, that is, the upper slit roller (2) is rotated clockwise and the lower slit roller (2) is rotated counterclockwise at a constant speed. Each slit roller (2) has a large number of through holes (12) in its one end surface (11).
, and a similar through hole (
13), the filtrate entering the slit roller (2) from the slit (3) passes through the through hole (12).
The filtrate is discharged to the outside from the filtrate discharge pipe (14) through the through hole (13). In addition, (15) is a feeding chute provided at the entrance (4) of the filtration chamber (1) so that its tip reaches the slit roller (2), and (16) is a chute provided similarly at the outlet (5) of the filtration chamber (11). A discharge chute is provided.

(Function) In this configuration, each slit roller (2)
If the material to be treated, such as sewage sludge, is input through the input chute (15) at the entrance (4) of the filtration chamber (1) while rotating in the same feeding direction by the drive motor (10), the material to be treated will flow through the hollow slit. It is filtered by gravity on the fine slits (3) made in large numbers on the surface of the roller (2), and then progresses in a zigzag pattern while being pressurized between the upper and lower slit rollers (2), and gradually Dehydrated. At this time, the slit roller (
2) Since the gap between 2) and (2) is minute, only the filtrate flows out, and the material to be treated such as sludge does not flow out, and the transfer direction can be changed upward by the next pickpocket roller (2). Dehydration is accelerated by the large shearing effect. In addition, as shown in the figure, if the distance between the upper and lower slit rollers (2) is arranged so that it gradually narrows in the feeding direction, the pressure gradually increases toward the outlet (5), resulting in a better dewatering effect. The slit roller (2) arranged upwardly toward the outlet (5) has the advantage that the filtrate is not reabsorbed into the dewatered cake. In this way, the object to be processed is transferred to the slit roller (2
) and (2), the pressure is applied to the part with a small gap between them, and the pressure is low in the middle part, and the water becomes uniform, so that the entire area is uniformly dehydrated, and a dehydrated cake is delivered to the outlet (5).
) will be discharged from the discharge chute (16).

The filtered water enters the slit roller (2) through the slit (3), passes through the through hole (12), through hole (13), and through the filtrate discharge pipe (
14) to the outside, but the lower thrift (3)
(Effects of the Invention) As is clear from the above description, the present invention is a system in which hollow slit rollers are arranged in two rows with a fine gap between them. 1. Unlike the conventional filter plates that stack many filter plates, it has a simple structure and is easy to disassemble and assemble.
Since it does not use a filter cloth, there is no risk of clogging (and it is inexpensive and has no risk of failure. Therefore, the present invention contributes to the development of industry to a great extent as it solves the conventional problems. It is.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway front view showing an embodiment of the present invention, and FIG. 2 is a partially cutaway side view. (2) Nislit roller, (3) Nislit, (10)
: Drive motor. Shikaku22no

Claims (1)

[Claims] 1. A plurality of hollow slit rollers (2) each having a large number of fine slits (3) on the surface through which the filtrate passes are arranged in two rows, one above the other, with minute gaps between them. A slit roller type dewatering device characterized in that the slit rollers (2) are rotated in the same feeding direction. 2. Claim 1, wherein the slit rollers (2) are arranged in parallel on an upward slope in the feeding direction of the processed material.
The slit roller dewatering device described in Section 1. 3. The slit roller according to claim 1 or 2, wherein the slit rollers (2) are arranged in two rows, one above the other, and the distance between the top and bottom becomes gradually narrower in the feeding direction. Type dehydration equipment.