JP4098156B2 - Screw type filter dehydrator - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention is a screw-type filter dehydration for separating a suspension containing suspended fine particles generated in a relatively small-scale sewage treatment operation represented by, for example, an oxidation ditch method into a filtrate and suspended fine particles. It relates to the device.
[0002]
[Prior art]
A large number of annular filtration plates are placed at a predetermined distance from each other into a cylindrical filtration frame having one end portion as a sludge feed port and the other end as a dewatered cake feed port, and a large number of through holes on the peripheral surface. The annular movable plates are loosely fitted between the laminated layers of the annular filtration plates to form a cylindrical filter body having a slit between the plates as a drainage drainage groove. A screw type filtration dehydrator for rotating each annular movable plate eccentrically by driving a screw conveyor fitted in a central hole is known. Conventionally, as a means for regulating the interval between the annular filtration plates, a hole for inserting a bolt is drilled in an ear portion protruding from a plurality of locations around each annular filtration plate, and a short tubular interval holder is interposed. In this method, a through bolt is inserted into each ear hole, and an end of the through bolt is screwed with a nut (for example, see Patent Document 1).
[0003]
[Patent Document 1]
JP 2000-288598 A (FIGS. 1-4)
[0004]
[Problems to be solved by the invention]
As in the solid-liquid separator shown in Patent Document 1, the method in which the short tubular spacing holder is interposed between the annular filtration plates through the bolts causes poor assembly workability and increases the manufacturing cost. In addition, the workability of the disassembly maintenance is remarkably disadvantageous. Further, it is often necessary to adjust the groove width of the drainage drainage groove in accordance with the concentration and properties of the sludge to be treated, and this groove width adjustment is performed by changing the interval between the annular filtration plates. However, in order to do so, it is necessary to prepare various interval holders with different thicknesses in advance, select the interval holders that match the set intervals, and perform filter recombination, especially at the sewage treatment site. In the case of performing the above, it is easy to cause mistakes or loss of the spacing holder, which is accompanied by great difficulty.
[0005]
The present invention improves the assembly workability to reduce the cost of the product and is excellent in disassembly and maintenance.It is easy to change and finely adjust the set interval between the annular filtration plates. It is an object of the present invention to provide a screw-type filter dehydrator that can easily and quickly replace a filter body without causing mistakes or loss.
[0006]
[Means for solving problems]
The screw type filtration dewatering device according to the present invention is configured such that a plurality of annular filtration plates are arranged in a laminated form while maintaining a predetermined interval, and an annular movable plate is loosely fitted between each lamination of the annular filtration plates. It is formed in a cylindrical filter body with a slit between the plates as a drainage groove, a screw conveyor is fitted in the central hole of the filter body, and the opening end of the filter body is used as a sludge feed opening Is a screw type filtration dewatering device having a dewatering cake delivery port, and has a seat portion that is led outside the eccentric rotation trajectory of the outer periphery of each annular movable plate at a plurality of locations on the outer periphery of each annular filtration plate, A mounting hole for fitting with a leg piece of a spacer, which will be described later, is drilled in each seat, and the leg piece protruding from the back surface of the spacer is fitted with an adjustment washer, and is fitted into the mounting hole. In the protruding state of the spacer to be fixed Ri and-regulating the spacing between the annular filtration plate, and the outer peripheral edge of each seat is then supported by a fixed body provided in an annular movable plate and a non-contact form.
[0007]
【Example】
This will be described below with reference to the embodiment shown in FIGS.
[0008]
Reference numeral 1 denotes a cylindrical filter body, in which a large number of annular filtration plates 2... 2 are arranged in a stacked manner while maintaining a predetermined interval, and each annular filtration plate 2. The movable plates 3... 3 are loosely fitted to form slits between the plates in the drainage outflow grooves 4. On the outer periphery of each annular filtration plate 2.. 2, there are seat portions 5... 5 that are led out from the eccentric rotation locus of the outer periphery of each annular movable plate 3. The spacers 6.. 6 and the adjusting washers 6 W.. 6 W, which will be described later, fixed to the portions 5. Also, make sure to hold it slightly larger. Fixing leg pieces 6P project from the back surfaces of the spacers 6, and mounting holes 6H of the leg pieces 6P are formed in the respective seat portions 5, and an adjustment washer 6W is interposed in the leg pieces 6P. In this manner, the spacer 6 is fixed to the surface of the seat portion 5 by being fitted into the mounting hole 6H. The fitting method of the leg pieces 6P is not limited to the eyelet method, the cassette pin method, the caulking method, the crimping method, and the like, but the screw-in method is the best in the degree of replacement of the spacer 6. In the case of the screw-in method, a female screw is engraved on the inner periphery of the mounting hole 6H. However, when the spacer 6 is made of resin, for example, the outer periphery of the leg piece 6P is not necessarily a male screw. It is not necessary to engrave. 7 and 7 are fixed bodies that support the respective seats 5 and 5 and, for example, are installed in a frame shape along the outside of the filter body 1 while maintaining a non-contact state with the annular movable plates 3 and 3. The front and rear ends are fixed to the set brackets 14 and 14, respectively.
[0009]
The filter body 1 configured as described above is provided, for example, horizontally above a storage tank (not shown), and its opening at the start end serves as an inlet 8 for sludge, and the terminal opening serves as an outlet 9 for dehydrated cake. A screw conveyor 11 is fitted into the center hole 10. Reference numeral 12 denotes a prime mover for driving the screw conveyor 11, and 13 denotes a discharge pressure adjusting valve attached to the delivery port 9. As an example, as shown in FIG. 2, the screw conveyor 11 is formed such that the outer diameter of the screw blade 11B is smaller than the inner diameter of the annular filtration plate 2 and larger than the inner diameter of the annular movable plate 3, and as the screw conveyor rotates. The annular movable plates 3.. 3 rotate eccentrically to prevent clogging of the drainage outflow grooves 4.
[0010]
When the prime mover 12 is driven, the screw conveyor 11 rotates, and the outer peripheral edge of the screw blade 11B slides obliquely on the inner peripheral edge of each annular movable plate 3. In the process in which the sludge sent into the filter body 1 moves forward in the axial direction while turning along the screw blade 11B, the filtered filtrate flows down through the drainage outflow grooves 4 and 4 and is dehydrated. The dehydrated cake having a low moisture content is sequentially discharged from the front delivery port 9.
[0011]
The interval between the annular filtration plates 2... 2 is regulated by the protruding state of the spacers 6. The groove width of the drainage grooves 4 ··· 4 is preferably adjustable in accordance with the concentration and properties of the sludge to be treated, but the adjustment is performed between the annular filtration plates 2 · · 2 Realized by change. This interval change is easily performed by increasing or decreasing the number of adjustment washers 6W interposed in the spacer 6. Accordingly, several types of annular filtration plates 2 with different numbers of interposing washers 6W are prepared in advance, and appropriate annular filtration plates 2 and 2 are selected according to the concentration and properties of sludge and the filter body 1 is selected. May be laminated. As described above, the distance between the annular filtration plates 2... 2 is not adjusted by the protruding thickness of the spacer 6 itself, but is adjusted by the number of interposed washers 6W for adjustment. Become.
[0012]
【The invention's effect】
According to the screw type filtration dewatering device of the present invention, the assembly workability is improved, the cost of the product can be reduced, the disassembly maintenance is excellent, and the setting interval between the annular filtration plates can be easily changed and finely adjusted. Thus, there is an advantage that the filter body can be easily and quickly replaced without causing mistakes or loss of members, particularly at the sewage treatment site.
[Brief description of the drawings]
FIG. 1 is a vertical side view schematically showing a configuration of a screw type filtration dehydration apparatus to be an object of the present invention.
FIG. 2 is a longitudinal front view of the device of the present invention.
FIG. 3 is a side view of an essential part of a filter body in the device of the present invention.
FIG. 4 is a front view of an annular filtration plate in the device of the present invention, and shows a state where a spacer is not fixed to a seat portion.
FIG. 5 is a front view of an annular filtration plate in the device of the present invention, and shows a state in which a spacer is fixed to a seat portion via an adjustment washer.
6 is a longitudinal side view taken along the line AA in FIG. 4;
7 is a longitudinal side view taken along line BB in FIG. 5. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Cylindrical filter body 2 Annular filtration plate 3 Annular movable plate 4 Filtrate outflow groove 5 Seat part 6 Spacer 6H Mounting hole 6P Leg piece 6W Adjustment washer 7 Fixed body 8 Sludge feed port 9 Dehydrated cake feed port 10 Filtration Body center hole 11 Screw conveyor

Claims (1)

A plurality of annular filtration plates are arranged in a layered form while maintaining a required interval, and an annular movable plate is loosely fitted between the layers of the annular filtration plates so that the slits between the plates serve as drainage drain grooves. Screw type filtration with a screw conveyor fitted in the center hole of the filter body, a sludge feed port as the sludge feed port, and a dewatered cake feed port as the end port The dewatering device has seats that are led out from the eccentric rotation trajectory of the outer periphery of each annular movable plate at a plurality of locations on the outer periphery of each annular filtration plate. A mounting hole is formed, and an adjustment washer is provided on a leg piece protruding from the back surface of the spacer. Regulate the spacing between the filtration plates, One, the outer peripheral edge of each seat is characterized in that it was supported on a fixed body provided in an annular movable plate and a non-contact form, a screw filtering and dewatering device.

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