JPH04200606A - Rotary disk type drainage equipment - Google Patents

Abstract

PURPOSE:To efficiently filter and separate liquid by eccentrically rotating, around a crank-shaft, many disks whose marginal faces are projected on a slit plate in the direction for discharging the material to be treated and sending the sludgelike material to be treated to a discharge side on the slit plate. CONSTITUTION:A slit plate 4 having many slits 7 formed thereto is provided in a casing 2 wherein the sludgelike material to be treated is introduced and discharged. The slit plate 4 stops the material to be treated and guides the same in the direction of discharge thereof. Many crankshafts 8 are arranged and axially supported in the direction of discharge of the material to be treated in the lower part of the slit plate 4. Many disks are axially fitted to the crankshafts 8. The external circumferences of these disks are inserted into the slits 7 so that the marginal faces are elevatingly fluctuated on the upper face of the slit plate 1, according to rotation in the transfer direction of the crankshafts 8. Liquid is filtered and separated by the slit plate 4 in a stage for sending the material to be treated to a discharge side by eccentric rotation of many disks 9. As a result, the liquid of the sludge-like material to be treated is efficiently filtered and separated.

Description

[Detailed description of the invention] <Industrial application field> This invention is applicable to sewage sludge, urine treatment sludge, fishery processing wastewater, 1-layer livestock farm wastewater, 1-layer food factory wastewater, other liquid-containing sludge-like industrial waste, etc. The present invention relates to a rotating disk type dewatering device for dehydrating water.

゛〈Conventional technology〉 Conventional rotating disk type dewatering (water) equipment has a number of rotating disks attached to each of a number of rotating shafts that are supported horizontally and close to each other in parallel, and has a structure in which the outer peripheries of the disks rotate in the same direction while being alternately overlapped,
There is a known method in which a sludge-like processed material is put onto the original filter plate formed by the rotating plate, and the processed material is filtered or compressed in the process of being sent in the discharge direction by rotating the rotating plate in the feeding direction. There is.

<Problems to be Solved by the Invention> The above-mentioned dewatering equipment has many advantages, such as being capable of continuous automatic operation with low power and no vibration or noise, being compact, and having stable dehydration processing capacity. Since the disks of the shaft alternately overlap laterally and rotate in the feed direction, the overlapping parts rotate in opposite directions.

As a result, the side surfaces of the discs create frictional resistance, which increases energy loss, and the wear between the discs' sliding contact is large, and the space between the discs' sliding contact surfaces becomes a gap for liquid to pass through, which is too narrow to prevent filtration. The drawback is that it is inefficient.

In addition, since the disk simply rotates, the collected material that has been dehydrated to a certain degree loses its fluidity, causing slippage between it and the circumferential surface of the disk, resulting in poor delivery efficiency. be.

Means for Solving the Problems> The apparatus of the present invention for solving the above problems first includes a casing 2 into which the sludge-like processed material is introduced and discharged, which receives the processed material and guides it in the discharge direction. A slit plate 4 having a large number of slits 7 is provided, and below the slit plate 4, a large number of crankshafts 8 arranged along the discharge direction of the processed material are supported. axis 8
A large number of discs 9 whose outer peripheries are inserted into the slits 7 are mounted on a shaft so that the peripheral surfaces move up and down on the upper surface of the slit plate 4 as the material rotates in the feeding direction. It is characterized by a mechanism in which the liquid needle is filtered and separated by the slit plate 4 during the process of sending it to the discharge side by rotation.

Furthermore, in addition to the above-mentioned means, a belt conveyor 13 is installed close to the upper surface of the slit plate 4 and rotates in the discharge direction of the processed material, and the collected material on the slit plate 4 is compressed to remove liquid.
Hot air supply that sends hot air from either the upper or lower direction to a point provided above or a predetermined range on the processed material discharge side of the slit plate 4 and disk 9 to dry the collected material after the filtration process that passes over the slit plate. Each of these is characterized by the provision of a section 21.

<Function> A sludge-like liquid-containing treated material is put into the casing 2, received by the slit plate 4, and a large number of discs 9 whose peripheral surfaces protrude above the slit plate 4 are cranked in the direction of discharge of the treated material. By eccentrically rotating the shaft 8, the processed material is sent over the slit plate 4 to the discharge side. In this process, the liquid component falls through the gap between the slit 7 and the disk 9 and is filtered, and the solid component in the processed material is separated and collected.

The belt conveyor 13 is provided depending on the properties of the processed material and other conditions, and the belt 17 presses the processed material moving on the slit plate 4 from above to compress and filter the liquid component and ensure reliable feeding. The processed material is then discharged in the form of an easy-to-handle cake.

When the hot air supply section 21 is provided at the upper or lower part of the extension of the slit plate 4 and hot air is sent, the collected material on the slit plate 4' is dried and solidified and discharged.

<Example> To explain in detail the example shown below, FIG.
Into the box-shaped casing 2 into which the sludge-like liquid-containing treated material is introduced from the inlet 1, a casing of approximately 1.5 mm is installed, for example, approximately horizontally or with the discharge port 3 side slightly inclined, so as to partition the upper and lower parts.
A slit plate 4 made of a stainless steel plate with a thickness of ~2 mm is supported by a support beam 6. The slit plate 4
For example, a width of 0.6 is inserted through the upper outer periphery of the disk described later.
A large number of slits 7 with a length of n+m and a length of about 65 mm are 1.0 to 1.5 mm in the lateral direction (casing inner width of about 300 mm).
The holes are arranged in about 10 rows in the vertical direction at a pitch of about 85 mm. Further, the slits 7 are alternately shifted by 0.5 pitch in each row.

The slits 7 in each row of the slit plate 4 have a distance of 5 mm above and below the center position (stroke amount l0IllI).
A crankshaft 8 that rotates eccentrically at an angle of I+) is rotatably installed horizontally, and the upper outer periphery of the crankshaft 8 is provided with the slit 7.
A large number of discs 9 are inserted into the slit plate 4 and protrude from the upper surface of the slit plate 4, and are mounted so as to rotate together, and a spacer 11 consisting of a small-diameter donut-shaped disc is inserted between each disc 9. so that each disc 9 is fixed in correspondence with the lateral pitch of each slit 7. The disk 9 has a thickness of, for example, 0.4 mm and an outer diameter of about 75 mm.

The disk 9 has 0.5 to 2 r, p, m in each row.
Since the sludge-like processed material introduced onto the slit plate 4 is lifted from below by the circumferential surface of the disks 9 in each row, the sludge-like processed material is rotated slowly and eccentrically in the direction of discharging the processed material at the same time. It is sent out along the upper surface of the paper in the direction of the discharge port 3.

10 is a driving sprocket fitted to the end of the crankshaft 8. In the process of moving the sludge-like material on the slit plate 4,
Water and other liquid components are filtered downward from the front and rear ends of the slit 7 and the gap between the slit 7 and the disc 9 and are discharged to the outside from the drain port 12, and the solid components collected on the slit plate 4 are While being sent to the circumferential surface of the plate 9, the water is sequentially filtered and dehydrated and discharged from the discharge port 3.

In the illustrated example, the crankshafts 8 on each side are all eccentrically rotated in the same phase, so the entire circumferential surface of the disc 9 that appears on and retracts from the slit plate 4 moves up and down at the same time. By sequentially shifting each side of the circumferential surface of the disk 9 by a fixed angle, a mechanism can be used in which the movement of each side of the circumferential surface of the disk 9 changes in the feeding direction while forming a waveform.

Reference numeral 13 denotes a belt conveyor installed as necessary to cover the upper surface of the slit plate 4. The bottom surface of the endless belt 17 made of rubber or the like supported by rollers 14 and 16 is connected to the inlet 1 on the slit plate 4. The belt 17 is installed diagonally so as to maintain an interval of about 50 mm on the side and about 10 to 20 mm on the side of the discharge port 3, and a presser roller 1 is installed inside the belt 17 on the side of the discharge port 3.
8 is pivoted.

The belt 17 is driven by the drive roller 16 so that its lower side moves in the process material discharge direction at approximately the same circumferential speed as the feeding speed of the disk 9, and the bottom surface of the belt 17 and the top surface of the slit plate 4 are It is a mechanism that compresses and dehydrates the processed material while pressing and clamping it between the spaces, and gradually increasing the pressure strength as the gap between the widths increases toward the discharge side, and sends out the collected material in the form of a cake to the discharge port 3 side. The outer peripheral surface of the belt 17 has an uneven surface 19 formed in the shape of a large number of ribs or protrusions in order to prevent idling due to slip when feeding the sludge-like material to be processed.

At the end on the side of the discharge port 3 in FIG. 1, a drying device B as shown by the imaginary line in the figure can be provided. The drying device B has a hot air supply section 21 at the bottom, an exhaust port 22 at the top, a casing 24 whose left end is connected to the discharge port 3 of the filtration device A, and whose right end has a discharge port 23. .

Inside the casing 24, a feeding mechanism consisting of a slit plate 4', a disk 9', a crankshaft 8', etc. is provided so as to be continuous from the filtration device A, and has the same structure and function as in the case of the filtration device A. The dehydrated or cake-shaped collected material discharged from the filter device A is fed onto the slit plate 4 and is sent out to the discharge port 23 side and discharged.

The collected material is dried and dehydrated by hot air supplied and discharged from the hot air supply section 21 toward the exhaust port 22 in the above-mentioned discharge process. As a result, the collected material dehydrated and discharged from the filtration device A is further dried by the drying device B and recovered as a collected material with a low moisture or liquid content. The hot air supply section 21 may also supply hot air mixed with a chemically acting gas such as a deodorizing or sterilizing gas.

Since the above-mentioned filtration device flIA is small, in order to increase its capacity, it is sufficient to add a feeding mechanism consisting of a slit plate 4 and a disc 9 in series in the horizontal or vertical direction, and furthermore, a belt conveyor I3 is installed. If necessary, they may be added while adjusting the distance from the slit plate 4, or may be extended in the feeding direction.

In addition, the structure and dimensions of the casings 2 and 24 are not limited to the illustrated example, and can be changed arbitrarily depending on the properties of the processed material and other conditions, and the dimensions of the slit plate 41, rotating plate 9, etc. can also be changed in the same way. It is.

<Effects of the Invention> According to the device of the present invention configured as described above, since there is no friction between the discs, the number of power outlets due to frictional resistance can be reduced, and the size of the prime mover and transmission can be reduced. Similarly, since there is no contact between the disks, there is no wear on the side surfaces of the disks, and the conventional disadvantage of poor filtration efficiency due to the gaps between the disks is also eliminated.

In addition, since the upper surface of the slit plate is flat, the collected material can be fed smoothly, and the squeezing effect from the top is high.The eccentric rotation of the disc also eliminates feeding defects caused by slippage between the collected material and the disc. be.

In addition, since the structure is simpler than that of the conventional multi-rotary disks in which the circumferential surfaces are overlapped, costs can be significantly reduced and maintenance can be facilitated.

[Brief explanation of the drawing]

The drawings show embodiments of the present invention, and FIG. 1 is an overall sectional view showing the structure and principle of operation of the device of the present invention, FIG. 2 is a plan view of the main part thereof, and FIG. 3 is a sectional view in the direction of the feed axis. It is. 1: Inlet 2: Casing 3: Outlet
4.4' Nislit Plate 7: Suri Soto
8.8' Crankshaft 9: Disc 12:
Drain port

Claims (1)

[Claims] 1) Casing (2) for introducing and discharging sludge-like processed material
A slit plate (4) is provided in which the processed material is received and guided in the discharge direction, and a number of slits (7) are formed, and below the slit plate (4), the processed material is arranged along the discharge direction. A number of crankshafts (8) are rotatably supported, and the peripheral surface of the crankshaft (8) moves up and down on the upper surface of the slit plate (4) as the crankshaft (8) rotates in the feeding direction. A large number of disks (9) whose outer peripheries are inserted into the slits (7) are mounted on a shaft, and in the process of sending the processed material to the discharge side by eccentric rotation of the disks (9), the liquid is removed by the slit plate (4). A rotating disk type deliquor device with a mechanism that filters and separates the liquid. 2) A belt conveyor (13) that rotates in the discharge direction of the treated material in close proximity to the upper surface of the slit plate (4) and squeezes and deliquifies the collected material on the slit plate (4) is connected to the slit plate (4). )
The rotating disk type deliquor device according to claim 1) provided above. 3) A hot air supply unit that sends hot air from either the upper or lower direction to a predetermined range on the discharge side of the processed material of the slit plate 4 and the disk (9), and dries the collected material after the filtration process that passes over the slit plate with hot air. The rotary disk type dehydrating device according to claim 1, further comprising (21).