JPH11117263A - Dust collector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a dust collector capable of cleaning of foreign matters captured by a screen set in a channel in fluid flowing in the channel and continuously carrying out a series of treatment from capture of the foreign matters to cleaning, dehydration and delivery. SOLUTION: A dust collector has a horizontal screen 10 furnished with a rake 12 to scrape and collect foreign substances 2 toward one side of a channel 1 and a screw conveyor 20 to deliver the foreign substances scraped and collected by the screen 10 out of the channel. The screw conveyor 20 has a cleaning part provided with a screen type screw casing on the downstream side of the screw conveyor and a dehydrating part arranged out of the channel and provided with a screw casing having a drain part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a dust removing device,
More specifically, the present invention relates to a dust removing device having a function of capturing residue from a fluid such as sewage flowing in a flow path such as a water channel or a pipe, performing washing and dehydration, and transporting the collected water to the outside of the flow path.

[0002]

2. Description of the Related Art As a device for removing scum (contaminants and dust) flowing along with a fluid in a flow channel, a device is provided in front of a vertical bar screen installed in the flow channel. A dust remover provided with a rake for lifting is known. However, the conventional dust remover trapped the residue on the bar screen and fried the residue onto the channel with a rake, washed it with a special washing machine, and then dehydrated it with a special dehydrator. There were problems such as the generation of unpleasant odor from the residue, which had a bad effect on the working environment and hygiene.

Furthermore, in order to separately supply water for washing the residue, it is necessary to provide a water absorbing device such as a pump.
The installation space for each device for dust removal, washing, and dehydration is large, making it difficult to apply to small-scale treatment facilities.

[0004] Therefore, the present invention enables the washing of the residue captured by the screen to be performed in the fluid flowing through the flow path, and a series of processes from the capture of the residue to washing / dehydration and carrying out are performed continuously. It is an object of the present invention to provide a dust removing device capable of performing the following.

[0005]

In order to achieve the above object, a dust removing apparatus according to the present invention comprises a horizontal screen provided with a rake for scraping the residue toward one side of a flow path, and a screen provided by the screen. A screw conveyor for discharging the collected residue out of the flow path, wherein the screw conveyor is disposed in the flow path, and a screen-shaped screw casing is provided on the downstream side of the screw conveyor. It is characterized by having a washing part and a dewatering part provided outside the flow path and provided with a screw casing having a drain part.

Further, the present invention provides that the screen is formed in an arc shape with an outer peripheral surface facing upstream or downstream, and in the screw conveyor, a screw pitch of the dewatering section is set to a screw pitch of the washing section. That it is formed narrower than the pitch, and that the screw conveyor has a variable resistor capable of adjusting the cross-sectional area of the screw casing on the leading end side in the feed direction of the dewatering unit,
Furthermore, the screw has a crush plate.

[0007]

1 and 2 are schematic views showing one embodiment of a dust removing apparatus according to the present invention. FIG. 1 is a plan view and FIG.
Is a front view. The dust removing device includes a screen 10 provided over substantially the entire width of the flow path 1,
And a screw conveyer 20 provided on one side. The screen 10 is a so-called bar screen in which arc-shaped screen bars 11 having an opening angle of about 90 degrees are arranged in parallel at predetermined intervals in upper and lower stages, the screw conveyor 20 side being the most downstream, the other flow path side wall. The arc is formed so that the outer peripheral surface of the arc is directed to the upstream side so that the side is the most upstream.

A rake 12 for scraping the residue 2 trapped on the screen 10 toward the screw conveyor 20 is provided at the center of the arc of the screen bar 11.
The rake 12 is reciprocatingly rotated about a rotation shaft 13 driven by 6, and the tip of the rake 12 is formed in a comb-like shape that enters between the screen bars 11.

The screw conveyor 20 includes a screen 1
The seal plate 14a is provided at the downstream end of the screen 10 and a seal plate 14b provided on the side wall of the flow channel 1.
And is provided between them. In addition, screw conveyor 2
0 has a washing part 21 located in the flow path, a dehydrating part 22 on the upper side thereof, and a chute part 23 at the uppermost end,
The residue is washed in the washing unit 21, compressed and dehydrated in the dewatering unit 22, and the residue is poured into a predetermined container such as the container 3 from the chute unit 23.

FIGS. 3 and 4 show specific examples of the shape of the screen 10. FIG. 3 is a plan view, and FIG. 4 is a partially cutaway front view. A large number of screen bars 11 forming the screen 10 are supported on a frame 15 fixed to the bottom and side walls of the flow path 1 in a triangular shape in plan view at both ends thereof at predetermined intervals. Rotation axis 1
3 is rotatably supported by bearings 13a provided above and below the frame 15. Also, rake 12
A motor 16 having a reversing mechanism, which is attached to the rotating shaft 13 via an arm 12a and a rake frame 12b.
Reciprocates in an angle range of about 90 degrees. The screen 10 and the rake 12 can be formed by, for example, arranging plate-like members having a thickness of 6 mm at a pitch of 16 mm.

Further, a guide plate 17 for guiding the fluid flowing through the flow path 1 in the screen direction is provided at the upstream end of the screen 10.
Is provided with a protruding portion 11a having a shape continuous with the rear end of the guide plate 17. On the other hand, screen 1
On the downstream side of 0, there is provided a step 11b that is offset toward the center from the arc surface.

As described above, the projection 10a and the step 11b are provided at both ends of the screen 10, and the rake 12
Is reciprocated between the downstream side of the guide plate 17 and the state accommodated in the protruding portion 11a to the stepped portion 11b, so that no scraping remains in the most upstream portion of the screen 10, and In addition, the separation of the residue from the screen 10 at the most downstream portion can be reliably performed.

Further, since the screen 10 is formed in an arc shape, the rake 12 can be reciprocated simply by rotating the rotation shaft 13 at a predetermined angle in the forward and reverse directions. , Can be greatly simplified as compared to a flat screen.

FIGS. 5 to 8 show the screw conveyor 20.
5 is a partially cutaway front view, FIG. 6 is a cross-sectional view taken along the line VI-VI of FIG. 5, and FIG.
FIG. 8 is a sectional view taken along line II-VII of FIG.
It is an I line sectional view.

The screw conveyor 20 is provided with screw blades at a predetermined pitch on a screw shaft 25 driven by a motor 24 provided at the upper end. The pitch of the screw blades is changed from the washing section 21 to the dehydrating section 22. It is set to gradually decrease toward. For example, the washing unit 21 is 160 mm, and the first compression unit 2
2a is 140 mm, the next second compressed part 22b is 120 m
m, the dewatering unit 22c is formed at a pitch of 100 mm, while the residue is gradually compressed and water is squeezed out while the dewatering unit 22 is raised from the washing unit 21, and the water is separated by the dewatering unit 22c. Further, the chute portion 23 is provided with a reverse screw 23 a for scraping off the residue that has risen to the chute portion 23 from the screw shaft 25.

As shown in FIG. 6, a screw casing 26 of the washing section 21 has a pair of left and right frames 27 having outer dimensions corresponding to the distance between the seal plates 14a and 14b.
And a screen 28 covering a half circumference of the downstream side (lower side in FIG. 6) of the screw. The screen 28 has a plurality of strip-shaped screen bars 28a arranged radially with respect to the screw shaft 25, and the outer periphery thereof is supported by a semicircular support member 28b. Is formed so as to flow into the screw portion from the opening 26a between the upstream frames 27, 27, and the fluid and fine solid matter to flow downstream through the screen 28. Further, on the lower surface side of the screw located in the washing section 21, that is, on the surface with which the residue is contacted when the screw rotates in the opposite direction, crushing plates 21a for crushing the residue are formed at a plurality of places to protrude. ing.

The cleaning of the residue in the cleaning section 21 is performed by alternately rotating the screw in the forward and reverse directions.
The organic matter (dirt) in the residue is physically pulverized by the shearing force of the crushing plate 21a when the screw rotates in the reverse direction, and the finely pulverized dirt is screened together with the fluid flowing through the flow path 1 through the screen 28. Passes and flows downstream.
That is, after the rake 12 is operated and the residue captured by the screen 10 is raked to the screw conveyor portion,
By repeating the forward and reverse rotations of the screw conveyor 20, the residue can be washed. Therefore, the fluid flowing through the flow path 1 can be used as washing water as it is, so that the apparatus configuration can be simplified and the operating cost can be reduced as compared with a conventional washing machine that requires additional washing water. Since the crushing plate 21a is for obtaining a cleaning effect by crushing, a screw of the cleaning unit 21 may be provided with an appropriate size at an appropriate interval. And may be provided on the upper surface side of the screw so that it can be crushed even during normal rotation.

As shown in FIG. 7, the screw casing 29 of the dewatering section 22 is provided with a plurality of plate-shaped co-rotation preventing members 29a on its inner peripheral surface in the axial direction. In the dewatering unit 22, by rotating the screw in the forward direction, the co-rotation preventing member 29a prevents the co-rotation, thereby reducing the pitch of the screw blades in the first compression unit 22a, the second compression unit 22b, and the dewatering unit 22c. The water is gradually compressed, and the contained water is squeezed out and conveyed upward.

As shown in FIG. 8, the screw casing 29 of the dewatering section 22c has a drain hole 29 composed of a small through hole.
b is provided, and on the outer periphery of the drainage hole forming portion,
A water collecting box 30 having a drain pipe 30a is provided, and the water squeezed out of the residue enters the water collecting box 30 through the drain hole 29b and returns to the flow path 1 from the drain pipe 30a. In addition, the water collection box 30 has an inspection port 30b.
Are formed so that inspection and cleaning of the drain hole 29b can be performed.

A variable resistor 31 capable of adjusting the cross-sectional area (passage area) of the screw casing 29 may be provided between the leading end side of the dewatering section 22 in the feeding direction and the chute section 23. As shown in FIGS. 9 and 10, the variable resistor 31 includes a pair of resistance plates 31a having a semicircular opening.
Is provided so as to be movable in the radial direction by a guide plate 31b. By rotating an adjusting screw 31c screwed to the resistance plate 31a from the outside, the distance between the inner peripheral surfaces of both resistance plates 31a can be adjusted. Is formed. That is, by adjusting the distance between the two resistance plates 31a, it is possible to adjust the passage resistance of the sewage conveyed by the screw conveyor 20, and to adjust the compression ratio of the sewage in the dehydrating unit 22 according to the properties of the sewage. To an optimal state. When the variable resistor 31 is provided to increase the passage resistance of the residue, the pitch of the screw blades of the dewatering unit 22 is made smaller than that of the washing unit 21 as in the above-described embodiment, so that the transport function and the compression function can be performed. May have the same pitch,
That is, it is also possible to provide only the transfer function at the same pitch over the entire length of the screw conveyor 20. Also,
An aperture of an appropriate diameter may be inserted instead of the variable resistor 31 to adjust the passage resistance of the residue, or the shape of the casing itself may be changed.

Thus, one screw conveyor 2
At 0, by performing the steps from washing of the residue to compression and dehydration, not only simplification of the device configuration can be achieved, but also unpleasant odor does not occur and hygiene can be achieved, and the working environment can be improved.

Further, in this embodiment, since the lower end bearing portion 32 of the screw conveyor 20 is supported by the pins 33 so that the angle can be adjusted, the angle of the screw conveyor 20 is adjusted according to the water level of the fluid flowing through the flow path 1. By doing so, the residue can be more reliably washed.

The screen is not limited to the arc-shaped bar screen shown in the above embodiment, but may be a flat horizontal bar screen or a horizontal screen using a punching metal or the like. It is also possible to combine a plurality of screens according to the width. Further, even when the screen is formed in an arc shape, the opening angle can be set to an appropriate angle according to conditions such as the flow path width, and the outer peripheral surface can be directed to the downstream side. Furthermore, if the rake can scrape the captured residue to the screw conveyor side, it is not necessary to match its movement to the shape of the screen, and it is not limited to the reciprocating type shown in the embodiment, but it can be circulated using a chain or the like. It can also be an expression.

[0024]

As described above, according to the dust removing apparatus of the present invention, the integrated device installed in the flow path has:
Since the processes from capture of the residue to washing, dehydration, and carry-out can be performed continuously, it is sanitary, odor prevention and workability can be improved. In addition, since the organic matter is physically crushed by repeatedly rotating the screw forward and backward in the fluid flowing through the flow path, the cleaning of the residue is higher than the conventional cleaning by spraying the cleaning water. A cleaning effect can be exhibited.

[Brief description of the drawings]

FIG. 1 is a schematic plan view showing one embodiment of a dust remover of the present invention.

FIG. 2 is a schematic front view of the same.

FIG. 3 is a plan view showing an example of a shape of a screen.

FIG. 4 is a partially cutaway front view.

FIG. 5 is a partially cutaway front view showing one example of a shape of a screw conveyor.

FIG. 6 is a sectional view taken along line VI-VI of FIG. 5;

FIG. 7 is a sectional view taken along line VII-VII of FIG. 5;

8 is a sectional view taken along line VIII-VIII in FIG.

FIG. 9 is a cross-sectional view illustrating an example of a variable resistor.

FIG. 10 is an end view partially cut away.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Channel, 2 ... residue, 3 ... Container, 10 ... Screen, 11 ... Screen bar, 12 ... Rake, 13 ... Rotating shaft, 14a, 14b ... Seal plate, 15 ... Frame, 16
... Motor, 17 ... Guide plate, 20 ... Screw conveyor, 21 ... Washing unit, 21a ... Crushing plate, 22 ... Dewatering unit, 2
2a: first compression section, 22b: second compression section, 22c: dehydration section, 23: chute section, 23a: reverse screw, 24 ...
Motor, 25: Screw shaft, 26: Screw casing, 27: Frame, 28: Screen, 29: Screw casing, 29a: Co-rotation preventing member, 29b
... water drain hole, 30 ... water collecting box, 30a ... drain pipe, 3
1: Variable resistor

Claims (6)

[Claims] 1. A dust remover having a horizontal screen provided with a rake for scraping residue toward one side of a flow path, and a screw conveyor for discharging the residue scraped by the screen to the outside of the flow path. An apparatus, wherein the screw conveyor is disposed in a flow path, a washing section provided with a screen-shaped screw casing downstream of the screw conveyor, and a screw casing disposed outside the flow path and having a drain section. And a dewatering unit provided with a dewatering unit. 2. The screen according to claim 1, wherein the screen is formed in an arc shape with an outer peripheral surface facing upstream.
A dust remover as described. 3. The screen according to claim 1, wherein the screen is formed in an arc shape with an outer peripheral surface facing downstream.
A dust remover as described. 4. The dust removal apparatus according to claim 1, wherein the screw conveyor has a screw pitch of the dewatering unit narrower than a screw pitch of the washing unit. 5. The dust remover according to claim 1, wherein the screw conveyor includes a variable resistor capable of adjusting a cross-sectional area of a screw casing at a leading end side in a feeding direction of the dewatering unit. 6. The dust remover according to claim 1, wherein the screw conveyor has a crush plate on a screw.