JP4015039B2 - Screw type filter dehydrator - Google Patents

Description

[0001]
TECHNICAL FIELD 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 arranged in a stacked manner while maintaining a required interval, and formed into a cylindrical filtration body having a gap between the annular filtration plates as a drainage groove, and a starting end opening of the filtration body is formed. A screw-type filtration and dehydration apparatus is known in which a screw conveyor is fitted in a center hole using a terminal opening as a sludge feeding port and a dewatering cake delivery port. For maintaining the formation state of the filter body, generally, a hole for inserting a bolt is drilled in an ear protruding from a plurality of locations around each annular filtration plate, and a short tubular spacer is interposed to each plate. A structure is adopted in which a through bolt is inserted into each of the ear holes and the end of the through bolt is screwed with a nut (see, for example, Patent Document 1).
[0003]
[Patent Document 1]
JP-A-9-220599 (Fig. 1-4)
[0004]
[Problems to be solved by the invention]
However, in the structure shown in Patent Document 1, it is necessary to insert a large number of annular filtration plates and short tubular spacers into a plurality of through bolts one by one when assembling the filter body. As a result, the assembly workability is poor and the manufacturing cost increases. In addition, this type of apparatus for handling sludge often requires maintenance and inspection accompanied by disassembling of the filter body by exchanging worn plates, etc. In the structure disclosed in Patent Document 1, a plurality of pieces of paper are passed through during disassembly. Bolts must be extracted from each annular filtration plate and short tubular spacer, and after disassembling, the filter body must be assembled again by the above-described procedure.
[0005]
An object of the present invention is to provide a screw-type filtration and dehydration apparatus in which a filter body can be assembled and disassembled accurately, quickly and easily, can be manufactured at low cost, and is excellent in maintainability.
[0006]
[Means for solving problems]
In the screw type filtration dewatering device according to the first aspect of the present invention, a plurality of annular filtration plates are arranged in a laminated form while holding a slit in a cylindrical outer frame having a drainage flow window on the wall surface. A slit between each annular filter plate is formed in a cylindrical filter body having a drainage groove, and the opening at the start end of the filter body is the inlet for sludge and the end opening is the outlet for the dehydrated cake. In a screw type filtration dewatering device fitted with a screw conveyor, a positioning fitting is engraved on the outer peripheral edge of each annular filtration plate, and a detent casing is provided vertically along the inner periphery of the cylindrical outer frame. The annular filtration plates are arranged in the cylindrical outer frame in a state in which the positioning fittings are locked to the rotation prevention casing. Further, in the screw type filtration dehydrator according to the second aspect, on the premise of the invention according to the first aspect, the detent housing vertically provided on the inner periphery of the cylindrical outer frame is screwed from the outside of the cylindrical outer frame. The bolt is fixed by a bolt, and the bolt can be removed to extract from the frame end of the cylindrical outer frame.
[0007]
BEST MODE FOR CARRYING OUT THE INVENTION
The following examples will be described with reference to FIGS.
[0008]
Reference numeral 1 denotes a cylindrical outer frame opened at a drainage outlet window 2 ··· 2 at important wall surfaces, and 3 is a detent housing vertically provided along the inner periphery of the cylindrical outer frame 1. It is fixed by a bolt 4 screwed from the outside of the cylindrical outer frame 1, and can be extracted from the frame end portion of the cylindrical outer frame 1 by removing the bolt 4, or the cylindrical outer frame 1. It is inserted into the groove 5 engraved on the inner side of the tube, and can be extracted from the frame end of the cylindrical outer frame 1, or is inserted into the groove 5 engraved on the inner side of the cylindrical outer frame 1. And fixed by a bolt 4 screwed from the outside of the cylindrical outer frame 1, and can be extracted from the frame end of the cylindrical outer frame 1 by removing the bolt 4. 6 is a cylindrical filter body, and a large number of annular filtration plates 7... 7 are arranged in a laminated form while retaining the required slits in the cylindrical outer frame 1, and between the annular filtration plates 7. Are formed in the drainage outflow grooves 8. A positioning fitting 9 is formed on the outer peripheral edge of each of the annular filtration plates 7..., And each annular filtration plate 7 is in a state in which the positioning fitting 9 is locked to the detent housing 3. .. 7 are arranged in the cylindrical outer frame 1. The annular movable plates 10.. 10 may be loosely fitted between the respective layers of the annular filtration plates 7. 11.. 11 is an interval holder protruding from the plate surface of each annular filtration plate 7.. 7, and when the annular movable plates 10. Spacing holders 11 are disposed at positions that are slightly thicker than the thickness of the annular movable plates 10 and 10 and are kept in a non-contact state with the annular movable plates 10 and 10. Reference numeral 12 denotes a fixed ring for holding the formed state of the filter body 6, and is detachably fixed to the frame end of the cylindrical outer frame 1. Then, the screw conveyor 16 is fitted into the center hole 15 with the start opening of the filter body 6 as the sludge feed port 13 and the terminal opening as the dewatered cake feed port 14. Reference numeral 17 denotes a prime mover for driving the screw conveyor 16, and 18 denotes a discharge pressure adjusting valve attached to the delivery port 14.
[0009]
When the prime mover 17 is driven, the screw conveyor 16 rotates (when the annular movable plates 10... 10 are loosely fitted between the respective layers of the annular filtration plates 7... 7, the annular movable plates 10. The sludge sent into the filter body 6 through the feed port 13 advances along the screw blade 16B in the axial direction while rotating eccentrically along the gap between the annular filtration plates 7,. , The filtered drainage flows down through the drainage outlet grooves 4 and 4 and the drainage outlet windows 2 and 2, and the dehydrated cakes that are dehydrated and have a low moisture content are sequentially discharged from the front outlet 14. Is done. When the filter body 6 is disassembled by exchanging the worn plate or the like, the annular filtration plates 7... 7 (and the annular movable plates 10... 10) are removed from the cylindrical outer frame 1 by removing the fixed ring 12. It can be easily removed. Further, when the rotation prevention housing 3 is fixed so as to be extracted, the annular filtration plates 7... 7 are rotated by extracting the rotation prevention housing 3 from the frame end of the cylindrical outer frame 1. Therefore, the filter body 6 can be further easily disassembled.
[0010]
【The invention's effect】
According to the present invention, it is possible to provide a screw-type filtration and dehydration apparatus that can be assembled and disassembled accurately, quickly and easily, can be manufactured at a low cost, and is excellent in maintainability.
[Brief description of the drawings]
FIG. 1 is a longitudinal side view schematically showing the configuration of a screw type filtration dehydrator according to the present invention.
FIG. 2 is a longitudinal side view of a main part of the screw type filtration dehydrator of the present invention.
FIG. 3 is a longitudinal front view of the screw-type filter dehydrator of the present invention.
FIG. 4 is a longitudinal front view of a cylindrical outer frame in the screw type filtration dehydration apparatus of the present invention.
FIG. 5 is a front view of an annular filtration plate in the screw filtration dehydration apparatus of the present invention.
FIG. 6 is a longitudinal front view of the cylindrical outer frame in the screw type filtration dehydrator of the present invention, in which a detent housing vertically installed on the inner periphery of the cylindrical outer frame is screwed from the outside of the cylindrical outer frame. An example of fixing with bolts is shown.
FIG. 7 is a longitudinal front view of a cylindrical outer frame in the screw type filtration dehydrator of the present invention, and shows an example in which a detent housing is inserted in a concave groove formed on the inner periphery of the cylindrical outer frame. Show.
FIG. 8 is a longitudinal front view of a cylindrical outer frame in the screw type filtration dewatering device of the present invention, in which a detent housing is fitted in a concave groove formed on the inner periphery of the cylindrical outer frame, and the cylindrical outer frame The example fixed by the bolt screwed from the outer side of a frame is shown.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Cylindrical outer frame 2 Filtrate outflow window 3 Anti-rotation housing 4 Bolt 6 Filter body 7 Annular filtration plate 8 Filtrate outflow groove 9 Positioning fitting part 13 Sludge feed port 14 Sludge feed port 15 Center hole 16 Screw conveyor

Claims (2)

A cylindrical outer frame with a drainage outflow window on the wall. A plurality of annular filtration plates are arranged in a stacked manner while holding the slits in layers, and the slits between the annular filtration plates serve as drainage outflow grooves. In a screw-type filter dehydrator formed by inserting a screw conveyor into a center hole with a starting end opening of the filter body as a sludge feed port and a terminal opening as a dewatered cake feed port, A positioning fitting is engraved on the outer peripheral edge of the annular filtration plate, and a detent housing is provided vertically along the inner circumference of the cylindrical outer frame, and the positioning fitting is engaged with the detent housing. A screw type filtration dewatering device, wherein each annular filtration plate is arranged in a cylindrical outer frame depending on the state. An anti-rotation casing vertically provided on the inner periphery of the cylindrical outer frame is fixed by a bolt screwed from the outside of the cylindrical outer frame, and is removed from the frame end of the cylindrical outer frame by removing the bolt. The screw-type filtration and dehydration apparatus according to claim 1, wherein the screw-type filtration and dehydration apparatus is configured to be extractable.

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