JP4480864B2 - Annular movable plate for screw type filter dehydrator - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention directly filters a suspension containing suspended fine particles generated in a relatively small-scale sewage treatment operation represented by an oxidation ditch method or the like in a low-concentration state without going through a concentration step. it relates annular movable plate according to a screw-type filtering and dewatering device for separating the suspension particles and.
[0002]
[Prior art and its problems]
An annular filtration plate and an annular movable plate, which are opposed to each other with a slit, form a set of filtration elements, and a plurality of sets of the filtration elements are arranged in a stacked manner with a gap between each other. It is formed in a cylindrical filter body with a gap as a separation water outflow groove, the starting end opening of the filter body is the inlet for the sludge raw water and the terminal opening is the outlet for the dehydrated cake. A screw conveyor formed larger than the inner diameter is fitted in the center hole of the filter body, and the front edge of the screw slides obliquely to the inner periphery of the annular movable plate when the screw conveyor is driven. A screw-type filter dehydrator configured to swing the plate eccentrically is known.
[0003]
However, in the conventional screw type filtration and dehydration apparatus, the screw and the annular movable plate are in mesh with each other, so the frictional resistance is large due to the side pressure acting on the sliding contact surface, which accelerates the wear of the screw conveyor and the annular movable plate, and the prime mover. The load on will also increase.
[0004]
OBJECT OF THE INVENTION
An object of the present invention, hardly wear caused by suppressing the increase of friction generated screw conveyor and annular movable plate, and, providing an annular movable plate according to a screw-type filtering and dewatering device without causing an increase in the load on the prime mover There is to do.
[0005]
[Structure of the invention]
In the screw type filtration dehydration apparatus according to the present invention, the annular filtration plate and the annular movable plate, which are opposed to each other through a slit, form a set of filtration elements, and a large number of sets of the filtration elements are separated from each other. By arranging the gaps in a stacked manner, the slits are formed into a cylindrical filter body having separated water outflow grooves, and the starting end opening of the filter body is used as a feed inlet for sludge raw water, and the end opening is used as a dewatering cake. A screw conveyor having an outer diameter slightly smaller than the inner diameter of the annular filtration plate and the annular movable plate is fitted in the center hole of the filter body as a delivery port, and the outside of the filter body is interlocked with the screw conveyor. an eccentric rotary shaft which搖振the outer periphery in sliding contact with the annular movable plate annular movable plate provided Te, the onset Ming annular movable plate, a plastic material as a base, by cutting the steel sliced shape The reinforcing ring member is constructed by fitting the outer circumference of the plate base that.
[0006]
【Example】
The embodiment will be described below with reference to FIGS.
[0007]
Reference numeral 1 denotes a set of filtration elements in which an annular filtration plate 2 and an annular movable plate 3 are arranged with a gap therebetween, and a large number of sets of the filtration elements 1 are separated from each other by spacers 4. Are formed in a cylindrical filter body 7 having separated slits 6... 6 as the separated water outflow grooves 6. The starting end opening of the filter body 7 is a feed port 8 for raw sludge water, and the end opening is a feed port 9 for dehydrated cake. A screw conveyor 11 is fitted in the center hole 10. The screw conveyor 11 is formed such that the outer diameter of the screw 11R is slightly smaller than the inner diameter of the annular filtration plate 2 and the annular movable plate 3, and is driven by a prime mover 12 to transfer suspended fine particles. The eccentric rotary shafts 13... 13 arranged outside the filter body 7 are driven to slidably contact the outer periphery of the annular movable plates 3. By shaking, the clogging of the separation liquid outflow grooves 6... 6 is prevented. The annular movable plate 3 is based on a plastic material, and a reinforcing ring 3H formed by cutting a commercially available steel pipe into a ring shape is fitted on the outer periphery of the plate base, and the reinforcing ring 3H is brought into sliding contact with the eccentric rotating shaft 13. It is desirable to configure as follows. In addition, the inner periphery of the annular movable plate 3 may be provided with recesses 3S... 3S for enhancing the transportability of suspended fine particles. Reference numeral 14 denotes a discharge pressure adjusting valve attached to the delivery port 9.
[0008]
【The invention's effect】
According to the present invention, since the annular movable plate is configured so as to be in non-contact with the screw conveyor, an increase in friction generated in the screw conveyor and the annular movable plate is suppressed, wear is hardly generated, and the motor can be used for a long time. load also rather than to increase, and without requiring that the entire annular movable plate and steel because it is the screw conveyor and the non-contact, the plate base is sufficient plastic material, the eccentric rotary shaft and sliding It is sufficient to fit a steel reinforcing ring only on the outer periphery that comes into contact, which helps to reduce the weight of the filter body. Moreover, since this reinforcing ring body can be obtained by cutting a commercially available steel pipe into a ring shape, it is advantageous in terms of manufacturing cost.
[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 front view of a filter element in the device of the present invention.
FIG. 3 is a longitudinal side view of a filter element in the device of the present invention.
FIG. 4 is a front view of an annular movable plate in the device of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Filtration element 2 Annular filtration plate 3 Annular movable plate 3H Reinforcement ring body 6 Separation water outflow groove 7 Filter body 8 Inlet 9 Outlet 10 Center hole 11 Screw conveyor 11R Screw 13 Eccentric rotation shaft

Claims (1)

An annular filtration plate and an annular movable plate, which are opposed to each other with a slit, form a set of filtration elements, and a plurality of sets of the filtration elements are arranged in a stacked manner with a gap between each other. Formed in a cylindrical filter body with a gap as a separation water outflow groove, the starting end opening of the filter body as a feed port for raw sludge and the terminal opening as a feed port for dewatered cake, and the outer diameter of the screw is an annular filter plate and A screw conveyor formed slightly smaller than the inner diameter of the annular movable plate is fitted in the center hole of the filter body, and the outer periphery of the filter body is slidably contacted with the outer periphery of the annular movable plate in conjunction with the screw conveyor. flops in scan clew type filtration dewatering device provided with an eccentric rotary shaft which搖振the movable plate, an annular movable plate is based on plastic material, the reinforcing ring body formed by cutting a steel sliced shape Characterized in that it is constituted by fitting the outer circumference of Tobesu, annular movable plate according to a screw-type filtering and dewatering device.

Images