JP2015203289A - Dust collector, water treatment facility and fitting method for water treatment facility - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve a problem with conventional dust collectors that a washing device and a dehydrator need to be additionally installed for washing away residues and other impurities collected by a rake and a large equipment cost and maintenance cost are required, and also to install a new dust collector that utilizes existing facilities.SOLUTION: A dust collector for solving the above problem is installed in a water channel, and comprises a crushing part that crushes impurities in water to be treated flowing in the water channel, and a discharging part installed on the downstream side of the crushing part and discharges the impurities crushed by the crushing part from the water to be treated, the dust collector having a height dimension greater than a dimension in the flow direction.

Description

  The present invention relates to a dust removing device for removing impurities from water to be treated containing impurities, a water treatment facility equipped with a dust removing device, and a method for attaching the dust removing device to the water treatment facility.

  To-be-treated water discharged from homes and factories is circulated through a sewage pipe, sent to a terminal sewage treatment plant via a pumping station, and predetermined water treatment is performed at the terminal sewage treatment plant. In the terminal sewage treatment plant, facilities for removing contaminants such as residue from the treated water are required. Examples of equipment for removing impurities such as screen residue include dust removal equipment that collects impurities using a bar screen or the like, and scrapes the collected impurities using a rake.

  For example, Patent Document 1 describes a dust removal facility that includes a rake that can be collected on a screen installed in a water channel and can scrape off a residue, and that moves the rake along the screen and scrapes off the residue. Yes. The rake is attached to an endless chain that forms a circular track along the screen, and the residue is scraped upward along the screen according to the driving of the chain.

  In addition, instead of the conventional dust removal screen and rake device installed in the water treatment facility, it is equipped with a crushing unit that crushes foreign substances and a discharge unit that discharges the crushed foreign substances from the water to be treated. Also known is a screw conveyor that is installed at an angle of 30 °.

JP 2003-184055 A

  If a conventional screw conveyor or the like installed at an angle of about 30 ° is used, the size in the flow direction of the dust remover equipped with a crushing part and a discharge part becomes large, so a large space is required to install the apparatus. In addition, there is a problem that the strength of the housing is reduced by increasing the opening.

As a result of diligent study, the present inventor has designed a dust removing device having a crushing portion and a discharge portion as a dust removing device for crushing contaminants in the water to be treated, with the height size of the dust removal equipment larger than the flow direction size. Thus, the present invention has been completed by finding that it can be attached to an existing opening where a conventional dust removing screen has been installed.
Specifically, the present invention provides the following dust removing device, water treatment facility, and method for attaching the dust removing device.

(First invention of the present application)
The first invention of the present application for solving the above problems is a crushing unit that is installed in a water channel and crushes impurities in the water to be treated flowing through the water channel, and is disposed downstream of the crushing unit, and is crushed by the crushing unit. A dust removing device that discharges the contaminated waste from the water to be treated, wherein the dust removing device has a height dimension larger than a flow direction dimension. .
(The second invention of the present application)
A second invention of the present application for solving the above-mentioned problem is a water comprising: a housing that forms a water channel therein; and a dust removing device that is installed in the water channel through an opening provided in an upper portion of the housing. It is a treatment facility, and the dust removing device includes a crushing unit that crushes impurities in the water to be treated flowing through the water channel, and the dust that is disposed downstream of the crushing unit and crushed by the crushing unit. A water treatment facility characterized in that the length in the flow direction of the opening provided in the housing is shorter than the height from the bottom of the water channel to the opening. is there.
(The third invention of the present application)
A third invention of the present application for solving the above-mentioned problems is a dust removing device installed in the water treatment facility according to the second invention of the present application, wherein the dust removing device is disposed above the opening through the opening. The dust removing apparatus is characterized by being inserted into a water channel and set to a size that can be installed on the bottom surface of the water channel.
(The fourth invention of the present application)
A fourth invention of the present application for solving the above-mentioned problems is a dust removing device installed in the water treatment facility according to the third invention of the present application, and when the dust removing device is installed on the bottom surface of the water channel, This is a dust removing device characterized in that it is larger than the height from the bottom surface of the water channel to the opening.
(The fifth invention of the present application)
A fifth invention of the present application for solving the above-mentioned problems is the dust removing apparatus according to the third or fourth invention of the present application, wherein the discharge section discharges the foreign matter onto the casing outside the opening. This is a dust removing device.
(The sixth invention of the present application)
The sixth invention of the present application for solving the above-mentioned problem is provided with a housing having a water channel formed therein and having an opening at the top, and the length of the opening provided in the housing in the flow direction is determined from the bottom of the water channel. An attachment method for attaching a dust removing device for removing contaminants in treated water to a water treatment facility set to be shorter than the height to the opening, wherein the dust removing device is disposed in the treated water flowing through the water channel. A crushing part for crushing impurities, and a discharge part arranged on the downstream side of the crushing part and discharging the impurities crushed by the crushing part from the treated water, and opening the dust removing device It is the attachment method of the dust removal apparatus characterized by installing in a housing via a part.
(The seventh invention of the present application)
A seventh invention of the present application for solving the above-mentioned problems is the method of attaching a dust removing device according to the sixth invention, wherein the opening is an attachment port for installing a dust removing screen.

According to the dust removing device of the first and third to fifth inventions of the present application, when the contaminants are crushed in the water to be treated, the organic components attached to the contaminants are separated. Can be suppressed.
In addition, as a discharge part for foreign substances, a water treatment system is adopted by applying a high installation angle and a long transfer distance, and making the height of the dust removing device including the crushing part and the discharge part larger than the dimension in the flow direction. A dust removing device that can be attached to an existing opening of a facility can be provided.
Furthermore, according to the dust removing apparatus of the first and third to fifth inventions of the present application, it is possible to suppress the off-flavor produced from the discharged contaminants, so that the processing for suppressing off-flavor such as washing can be omitted. . Moreover, the apparatus for suppressing the strange odor of foreign substances, such as a washing | cleaning apparatus and a dehydration apparatus, can be removed from the existing water treatment apparatus, and it can be set as a compact water treatment apparatus.

  In addition, according to the dust removing apparatus of the first invention of the present application, since the dust removing apparatus having a small length in the flow direction and having a cleaning effect of foreign substances can be provided, not only the existing water treatment equipment but also a newly installed It is possible to prevent an increase in length even in water treatment facilities.

  According to the water treatment facility of the second invention of the present application, using the existing opening such that the length in the flow direction of the opening is shorter than the height from the bottom of the water channel forming the water channel to the opening, Since the dust removing device provided with the crushing part and the discharge part can be attached, it is possible to provide a water treatment facility obtained by improving the existing water treatment facility.

  According to the attachment method of the dust removing apparatus of the sixth and seventh inventions of the present application, the existing opening can be used as it is, so that construction such as enlarging the opening can be omitted.

It is a top view which shows 1st Embodiment of the dust removal apparatus which concerns on this invention. It is a side view which shows 1st Embodiment of the dust removal apparatus which concerns on this invention. It is a figure which shows the casing opening which the dust removal apparatus which concerns on 1st Embodiment has. It is a figure which shows the casing opening which the dust removal apparatus which concerns on 2nd Embodiment has. It is a figure which shows the casing opening which the dust removal apparatus which concerns on 3rd Embodiment has. It is a top view which shows 4th Embodiment of the dust removal apparatus which concerns on this invention.

  Hereinafter, embodiments of a dust removing device according to the present invention will be described in detail with reference to the drawings. In the description of the drawings, the same elements are denoted by the same reference numerals, and redundant description is omitted.

The dust removal apparatus of this embodiment is installed using the opening part for dust removal screens installed in water treatment facilities, such as a sand basin in a terminal sewage treatment plant, for example.
As shown in FIG.1 and FIG.2, the water treatment apparatus of this embodiment has the water channel 90 formed in the inside of the housing defined by the bottom face 90a, the side walls 90b and 90c, and the upper plate 90d. The dust removing device 1 is installed in the water channel 90. An upper plate 90d is disposed on the water channel 90, and an opening 90e is provided in the upper plate 90d. The opening 90e is provided with a conventional dust removing screen, and the size of the opening 90e is designed to be shorter than the height from the water channel bottom surface 90a to the opening 90e. In a general sand basin, the length of the opening 90e in the flow direction is 2 to 5 m, and the height from the water channel bottom surface 90a to the opening 90e is 3 to 6 m.
In the existing opening 90e in which the conventional dust removal screen is installed, the height of the dust removal screen increases as the height from the water channel bottom surface 90a to the opening 90e increases. Accordingly, the length of the opening in the flow direction increases accordingly. It is also formed large. Therefore, even if the size of the housing forming the water channel changes, the relationship between the length in the flow direction of the opening 90e and the height from the water channel bottom surface 90a to the opening 90e does not change, and the length in the flow direction of the opening 90e. Is designed to be shorter than the height from the water channel bottom surface 90a to the opening 90e.

  Protrusions 91 and 92 that form a flow of the water to be treated W toward the dust removing device 1 are provided on the side wall of the water channel 90. The protrusion 91 is provided on the side wall 90b of the water channel 90, and the protrusion 92 is provided on the side wall 90c facing the side wall 90b. In the following description, for convenience, the direction in which the water to be treated W flows is the X direction, the direction from the side wall 90b to the side wall 90c is the Y direction, and the depth direction of the water W to be treated in the water channel 90 is the Z direction.

  The dust removing device 1 is installed in the water channel 90 through the protruding portions 91 and 92. The dust removing device 1 installed in the water channel 90 collects and crushes the foreign matter G contained in the water to be treated W flowing through the water channel 90, and then discharges the crushed foreign matter G from the water channel 90. The dust removing device 1 includes a contaminant processing unit 2 disposed so as to cross the water channel 90 and a contaminant discharge unit 3 disposed on the downstream side of the contaminant processing unit 2.

  The foreign matter processing unit 2 collects the foreign matter G in the water to be treated W and crushes the collected foreign matter G. Then, the foreign matter processing unit 2 discharges the crushed foreign matter G to the foreign matter discharge unit 3 installed on the downstream side. The contaminant processing unit 2 is disposed in an installation frame 93 that is installed so as to cross the water channel 90. The installation frame 93 is provided with positioning pins for positioning the foreign matter processing unit 2. The positioning pin is erected at a predetermined position on the bottom of the installation frame 93. The foreign matter processing unit 2 includes a screen device 4 for collecting the foreign matter G in the water W to be treated, and a crushing unit 6 for crushing the foreign matter G collected by the screen device 4. ing.

  As shown in FIG. 1, the screen device 4 collects impurities G in the water to be treated W and distributes the water to be treated W downstream. The screen device 4 is fixed to the protruding portion 91 and the crushing portion 6 provided on the side wall 90 b of the water channel 90, and is disposed on the upstream side of the crushing portion 6. The screen device 4 includes a screen unit 7 for collecting the foreign matter G and a transfer unit 8 for transferring the foreign matter G collected by the screen unit 7 to the crushing unit 6.

  The screen unit 7 includes a plurality of screen members 9 stacked in the depth direction Z of the water channel 90 (see FIG. 2). The screen member 9 has a flat plate shape and a substantially arc shape in plan view. The screen member 9 has a linear shape along the side wall 90b side of the water channel 90 from the diagonally downstream side of the axis CS in the screen member 9 to the side of the axis CS. The screen member 9 has an arc shape extending from the side of the axial center CS on the side wall 90b side to the side of the side wall 90c and the downstream side. The screen member 9 is open on the downstream side and on the side wall 90b side. The treated water W that has passed through the screen member 9 is discharged downstream from the opened portion 9a.

  The screen members 9 are arranged apart from each other in the depth direction Z (see FIG. 2), and are fixed by welding to a plurality of columns (not shown) extending in the depth direction Z. Between the screen members 9 is an eye through which the water to be treated W passes, and a foreign substance G larger than this eye is blocked by the screen portion 7.

  The transfer unit 8 includes a rake 11 that transfers the foreign matter G collected on the screen unit 7 to the crushing unit 6, a rake shaft 12 that rotates the rake 11 about the axis CR that extends in the depth direction Z, And a vertical electric motor 13 (see FIG. 2) for rotationally driving the rake shaft 12.

  The rake 11 is a flat member and is disposed between the screen members 9. In the transfer unit 8 of the present embodiment, three rakes 11 are evenly arranged between the screen members 9 at intervals of 120 ° in plan view with the rake shaft 12 as the center. Each rake 11 is bolted to the rake shaft 12 via a water flow guide plate 15.

  The rake 11 is made of an elastic body such as hard rubber, other rubber, or a leaf spring. The front end of the rake 11 has a length in the radial direction of the front end with respect to the rotation direction of the rake 11 longer than the length in the radial direction on the opposite back side. By forming the end portion of the rake 11 in this way, slipping of the contaminant G at the end portion of the rake 11 can be suppressed, and the contaminant G can be efficiently transferred to the crushing portion 6.

  The water flow guide plate 15 rotates together with the rake shaft 12 so that the flow direction of the water to be treated W can be changed. Thereby, the collected foreign substance G is made easy to peel from the outer periphery of the screen member 9. Moreover, in the transfer part 8 of this embodiment, since the water flow guide plate 15 is arrange | positioned equally at 120 degree intervals in planar view, the resistance which the to-be-processed water W exerts on the water flow guide plate 15 is disperse | distributed equally Can be

  The rake shaft 12 to which the rake 11 and the water flow guide plate 15 are fixed extends in the depth direction Z of the water channel 90, and both ends of the rake shaft 12 are rotatably supported by bearings (not shown). The rake shaft 12 is disposed at a position that is eccentric with respect to the center CS of the outer peripheral edge of the screen member 9. More specifically, the rake shaft 12 is arranged eccentric to the upstream side and the side wall 90 c side with respect to the center CS of the outer peripheral edge of the screen member 9. According to such an arrangement of the rake shaft 12, the tip of the rake 11 protrudes from the outer peripheral edge of the screen member 9 in the upstream region where the contaminant G adheres to the outer peripheral edge of the screen member 9. On the other hand, in the downstream area including the open portion 9 a, the tip of the rake 11 is set inside the outer peripheral edge of the screen member 9. Therefore, the tip of the rake 11 can be protruded from the outer peripheral edge of the screen member 9 in the upstream region where the contaminant G is collected.

  In this way, by providing the screen device 4, the contaminant G can be concentrated and transferred to the crushing unit 6, so that the amount of water to be treated W passing through the crushing unit 6 can be reduced. In addition, you may process the whole quantity of the to-be-processed water W in the crushing part 6, without providing the screen apparatus 4. FIG.

  The crushing part 6 is arrange | positioned between the screen apparatus 4 and the protrusion part 92 of the side wall 90c. The crushing part 6 is provided with an introduction port 14 for introducing the water to be treated W into the crushing part 6 on the upstream side. Moreover, the crushing part 6 is provided with a discharge port 16 for discharging the water to be treated W to the outside of the crushing part 6 on the downstream side. The discharge port 16 communicates with the contaminant discharge unit 3 disposed on the downstream side of the crushing unit 6.

  The crushing unit 6 includes two rotary crushing blades (cutter blades) 17 that are rotatably supported around a rotation axis extending in the depth direction Z of the water channel 90. The rotary crushing blades 17 are juxtaposed in the width direction Y of the water channel 90 so as to mesh with each other. Moreover, the crushing part 6 has the vertical motor 18 (refer FIG. 2) which rotationally drives the rotary crushing blade 17 in the upper part. The crushing unit 6 rotates the rotary crushing blade 17 in the direction in which the foreign matter G is wound by driving the vertical electric motor 18. More specifically, the rotary crushing blade 17 on the screen device 4 side is rotated clockwise in a plan view, and the rotary crushing blade 17 on the side wall 90c side is rotated counterclockwise. And the to-be-processed water W is introduce | transduced from the inlet 14, and the to-be-processed water W is discharged | emitted from the discharge port 16 through the crushing part 6. FIG. At this time, the crushing unit 6 sandwiches and crushes the foreign matter G in the water W to be treated and the foreign matter G transferred from the screen device 4 between the rotary crushing blades 17 to the foreign matter discharging unit 3 on the downstream side. Discharge towards.

  The contaminant discharge unit 3 includes a screw 20 and a casing 19 that covers the screw 20. The foreign matter discharge unit 3 introduces the foreign matter G crushed by the crushing unit 6 into the casing 19, and transfers the foreign matter G by the screw 20 disposed inside the casing 19, and is provided at the upper end of the casing 19. The impurities G are discharged from the discharge port 21 (see FIG. 2). The contaminant discharge unit 3 is disposed on the downstream side of the contaminant processing unit 2. More specifically, the contaminant discharge unit 3 is disposed on the downstream side of the crushing unit 6.

As shown in FIG. 2, the screw 20 moves the contaminant G vertically upward. A vertical electric motor 22 that rotates the screw 20 is provided on the upper end side of the screw 20. The lower end side of the screw 20 extends to the vicinity of the bottom surface 90 a of the water channel 90. The screw 20 is disposed so that the rotation axis CW of the screw 20 substantially coincides with the vertical direction. According to such an arrangement, it is possible to ensure good conveyance efficiency of the contaminant discharge unit 3. Since the bottom surface 90a of the water channel 90 of the present embodiment is disposed horizontally, the screw 20 is disposed such that an angle A formed by the bottom surface 90a of the water channel 90 and the rotation axis CW of the screw 20 is substantially vertical. . That is, the direction of the rotation axis CW of the screw 20 is substantially coincident with the depth direction Z. Here, “substantially vertical” in the present embodiment is a range of 80 ° to 100 °, and more preferably a range of 85 ° to 95 °.
By arranging the discharge portion so as to be substantially vertical, the apparatus can be made more compact. Furthermore, when it is transferred vertically upward, it faces the falling direction of the foreign matter, so that the dehydration effect due to its own weight is also exhibited.
Moreover, it is preferable to reduce the screw pitch upward, since the pressing action acts on the foreign matter and the dehydration effect is further enhanced.

  The screw 20 is a spring-like shaftless screw conveyor having a central opening 20a at the center thereof. A fixed shaft 23 having an outer diameter substantially equal to the inner diameter of the central opening 20a is inserted through the central opening 20a of the screw 20. By inserting the fixed shaft 23 through the center opening 20a, the fall of the foreign matter G can be suppressed, and the conveyance efficiency of the foreign matter discharge part 3 can be improved.

  The screw 20 includes portions having different outer diameter dimensions. More specifically, the outer diameter of the portion of the screw 20 that extends from the vicinity of the bottom surface 90a of the water channel 90 to above the highest water level HWL is equal to the outer diameter of the screw 20 that protrudes from the upper plate 90d of the water channel 90 from the highest water level HWL. It is larger than the diameter. Here, the maximum water level HWL is the position of the water surface L when the treated water W flowing through the water channel 90 is the largest, and is set from the operating conditions of a pump (not shown) disposed downstream of the dust removal equipment 1. .

  The casing 19 is a cylindrical member that protrudes from the bottom surface 90 a of the water channel 90 to above the upper plate 90 d of the water channel 90, and covers the screw 20. The casing 19 protrudes from the upper plate 90d of the water channel 90, and extends from the upper plate 90d to above the highest water level HWL of the water to be treated W and from the bottom surface 90a of the water channel to above the highest water level HWL. And a lower casing 19b. A tapered intermediate casing 19c is provided between the lower casing 19b and the upper casing 19a, and the interiors of the lower casing 19b, the intermediate casing 19c, and the upper casing 19a communicate with each other.

  A flat bar (not shown) extending in the direction of the rotation axis CW of the screw 20 is attached to the inner wall of the casing 19. The inner wall of the casing 19 to which the flat bar is attached has a concavo-convex shape with the flat bar as a convex portion. This flat bar is used to suppress the co-rotation of the foreign matter G and increase the conveyance efficiency of the foreign matter discharge unit 3.

  At one end of the upper casing 19a protruding from the upper plate 90d, a discharge port 21 for discharging impurities G is disposed. The foreign matter G discharged from the discharge port 21 is temporarily loaded in the container 94 and then transferred to an apparatus for disposing the foreign matter G. A vertical electric motor 22 for rotating the screw 20 is disposed at one end of the upper casing 19a. An intermediate casing 19c is connected to the other end of the upper casing 19a by a flange 24.

  One end of the lower casing 19b extends above the highest water level HWL and is connected to the intermediate casing 19c by a flange 26. A bottom surface member 27 is provided at the other end of the lower casing 19b. Further, the inner diameter of the lower casing 19b is made larger than the inner diameter of the upper casing 19a. When the inner diameter of the lower casing 19b is increased, the amount of the water to be treated W that can be introduced into the casing 19 increases, so that the ability to discharge the foreign matter G in the dust removal equipment 1 can be improved. The lower casing 19 b includes a casing opening 28 opened to the upstream side and a screen 29 provided on the opposite side of the casing opening 28.

  As shown in FIG. 1, the casing opening 28 communicates with the discharge port 16 of the crushing portion 6. Between the casing opening 28 and the discharge port 16, an introduction portion 31 for introducing the water to be treated W discharged from the discharge port 16 into the casing opening 28 is provided. Thereby, the to-be-processed water W discharged | emitted from the crushing part 6 flows in into the lower casing 19b.

  As shown in FIG. 3, the casing opening 28 has a rectangular shape when viewed from the front. The width B1 of the casing opening 28 is, for example, 50 mm. A lower end 28 a of the casing opening 28 is formed above the lower end of the screw 20. According to such a configuration, since the foreign matter G flowing in from the casing opening 28 can be reliably captured and transferred by the screw 20, the conveyance efficiency of the foreign matter discharge unit 3 can be increased.

  An upper end 28 b of the casing opening 28 is formed above the lowest water level LWL in the water channel 90. More specifically, the upper end 28b of the casing opening 28 is formed between the lowest water level LWL and the highest water level HWL, and the height H1 from the lowest water level LWL to the upper end 28b of the casing opening 28 is 2 of the pitch of the screw 20. It is formed to be less than twice. By forming the upper end 28b in this way, the conveyance efficiency of the foreign matter discharge unit 3 can be increased. Here, the lowest water level LWL is the position of the water surface L when the water to be treated W flowing through the water channel 90 is the smallest, and is set from the operating conditions of a pump (not shown) disposed downstream of the dust removal equipment 1. .

  As shown in FIG. 1, the screen 29 captures impurities G contained in the water to be treated W that has flowed into the lower casing 19 b. The screen 29 provided in a part of the lower casing 19b has a circular cross section and extends in the depth direction Z. A punching screen, a wedge screen, or the like is used for the screen 29 in order to suppress clogging.

  The dust discharge unit 3 for discharging the crushed dust G is limited to the substantially vertical screw conveyor constituted by the above-described screw 20 that moves vertically upward and the screen 29 formed in a part of the lower casing 19b. The dust removal screen such as a bar screen installed at an angle of 50 ° or more with the bottom surface 90a and the rake device that moves the foreign matter G collected on the dust removal screen upward along the dust removal screen. It may be configured. The angle between the dust removing screen and the bottom surface 90a, so-called installation angle, is preferably 60 ° or more. The higher the installation angle, the more compact the dust removing device of the present invention.

The dimension of the dust removing apparatus 1 of the present invention is designed so that the height dimension is larger than the flow dimension. By setting it as such a dimension, the dust removal apparatus 1 of this invention can be installed using the existing opening part 90e for the conventional dust removal screens.
Here, the height dimension of the dust removing device 1 is the overall height of the discharge unit 3 as shown in FIG.
The dimension in the flow direction of the dust removing device 1 is the length of the crushing unit 6 and the discharge unit 3 in the flow direction of the water W to be treated. In addition, when the screen apparatus 4 is provided in front of the crushing part 6, the entire length including the screen apparatus 4 is the flow direction dimension of the dust removing apparatus 1.

  Next, the operation of the dust removing device 1 will be described. On the upstream side of the dust removing device 1, the to-be-treated water W flowing through the water channel 90 contains impurities G. An organic component that has been dissolved in the water to be treated W may adhere to the contaminant G.

  The treated water W flowing through the water channel 90 flows into the screen device 4 or the crushing unit 6. When the water to be treated W flows into the screen device 4, contaminants G that are larger than the interval between the screen members 9 are collected, and the water to be treated W including the contaminants G that is smaller than the interval between the screen members 9. Outflow downstream. The collected contaminant G is transferred to the inlet 14 of the crushing unit 6 by the rake 11 that rotates clockwise, and flows into the crushing unit 6 together with the water to be treated W. That is, the foreign matter G flowing into the crushing part 6 includes those that are collected by the screen device 4 and transferred by the rake 11 and those that flow directly regardless of the screen device 4.

  The foreign matter G that has flowed into the crushing unit 6 is finely crushed by the rotary crushing blade 17. When the foreign matter G is crushed, the organic component adhering to the foreign matter G is separated from the foreign matter G and is dissolved in the water to be treated W again. Therefore, the to-be-processed water W in which the organic component adhering to the foreign substance G melt | dissolved flows out from the crushing part 6. And this to-be-processed water W contains the foreign substance G by which the organic component was removed finely crushed.

  The to-be-processed water W which flowed out from the crushing part 6 flows into the casing opening 28 of the lower casing 19b through the introduction part 31. In the lower casing 19b, the water to be treated W in which the organic components are dissolved passes through the screen 29 and flows out to the downstream side of the dust removing device 1. On the other hand, the contaminant G is prevented from flowing out downstream by the screen 29 and is transferred vertically upward by the screw 20. The transferred contaminant G is discharged to the container 94 from the discharge port 21 (see FIG. 2).

The dust removing device 1 separates organic components from the contaminant G by collecting the contaminant G in the water W to be treated by the screen device 4 and then crushing it by the crushing unit 6. The impurities G from which the organic components are separated are transferred by the screw 20 installed in the casing 19 and discharged from the water channel 90. Therefore, the contaminant G in the to-be-processed water W can be removed. On the other hand, the water to be treated W from which the contaminant G has been removed passes through the casing 19 and flows out from the contaminant discharge part 3. Since the organic component is dissolved in the to-be-processed water W which flows out, the to-be-processed water W containing an organic component can be flowed in the downstream of the dust removal apparatus 1. FIG. Therefore, according to the dust remover 1, in a water treatment facility such as an activated sludge treatment facility provided on the downstream side of the dust remover 1, a reduction in treatment efficiency due to a decrease in organic components in the water to be treated W can be suppressed.
Furthermore, according to the dust removal apparatus 1, since an organic component is removed from the foreign substance G, the bad odor which generate | occur | produces from the foreign substance G is suppressed, and the foreign substance G can be processed hygienically.

  Further, in the dust removing device 1, the screw 20 and the casing 19 are disposed substantially perpendicular to the bottom surface 90 a of the water channel 90. According to such an arrangement, when the discharge device is arranged obliquely with respect to the bottom surface 90a, for example, compared with a case where the angle formed between the bottom surface 90a and the rotation shaft of the screw is 30 °, the contaminant discharge unit 3 installation area can be reduced.

  The casing opening 28 opens to a position higher than the lowest water level LWL of the water to be treated W in the water channel 90. More specifically, the height H1 from the lowest water level LWL to the upper end 28b of the casing opening 28 is formed to be not more than twice the pitch of the screw 20. According to this casing opening 28, even if the water surface L in the water channel 90 is the lowest, it is possible to suitably introduce the foreign matter G present in the vicinity of the water surface L of the treated water W into the lower casing 19b. it can. Further, according to the casing 19 having the casing opening 28, the foreign matter G can be efficiently discharged because the foreign matter G is prevented from spilling from the casing 19 during the transfer of the foreign matter G by the screw 20. .

[Second Embodiment]
A dust remover according to a second embodiment will be described. As shown in FIG. 4, in the dust removing device of the second embodiment, the shape of the casing opening 32 of the lower casing 19b is different from the shape of the casing opening 28 of the first embodiment. Other configurations of the dust removing device of the second embodiment are the same as those of the dust removing device 1 of the first embodiment. The casing opening 32 has an upper end 32a formed above the highest water level HWL. More specifically, the height H2 from the highest water level HWL to the upper end 32a is set to not more than twice the pitch of the screw 20. According to the casing opening 32, the contaminant G is prevented from spilling from the casing 19 during the transfer of the contaminant G by the screw 20. Therefore, the contaminant G can be efficiently discharged. Moreover, according to such a casing opening 32, since the water surface L always cross | intersects the casing opening 32, the foreign substance G contained mostly in the water surface L vicinity can be efficiently introduce | transduced in the lower casing 19b. it can.

[Third Embodiment]
A dust remover according to a third embodiment will be described. As shown in FIG. 5, in the dust removing apparatus of the third embodiment, the shape of the casing opening 33 of the lower casing 19b is different from the shape of the casing opening 28 of the first embodiment. Other configurations of the dust removing device of the third embodiment are the same as those of the dust removing device 1 of the first embodiment.

  The casing opening 33 has a second casing opening 36 communicating with the first casing opening 34 in addition to the first casing opening 34 having the same shape as the casing opening 28 of the first embodiment. The second casing opening 36 has one end communicating with the upper end 34a of the first casing opening 34 and the other end formed above the highest water level HWL. Further, the width B3 of the second casing opening 36 is formed narrower than the width B1 of the first casing opening 34.

  According to such a casing opening 33, the water surface L always intersects the casing opening 33, so that the foreign matter G contained in the vicinity of the water surface L can be efficiently introduced into the lower casing 19 b. Furthermore, since the width B3 of the second casing opening 36 is formed to be narrower than the width B1 of the first casing opening 34, the foreign matter G being transferred by the screw 20 is suppressed from spilling from the casing opening 33. The conveyance efficiency of the contaminant discharge part 3 can be improved.

  In addition, embodiment mentioned above shows an example of the dust removal apparatus 1. FIG. The dust removing apparatus 1 according to the present invention is not limited to the above-described embodiment, and the dust removing apparatus 1 according to the above-described embodiment may be modified or otherwise changed without changing the gist described in the claims. It may be applied.

  In the said embodiment, although the internal diameter of the lower casing 19b is made larger than the internal diameter of the upper casing 19a, it is not limited to this. The inner diameter of the lower casing 19b may be equal to the inner diameter of the upper casing 19a.

  The screw 20 may have the same outer diameter from the lower end to the upper end. According to such a structure, the conveyance efficiency of the foreign material discharge part 3 by the screw 20 can be improved.

  The screw 20 is not limited to a shaftless screw conveyor, and may be a screw conveyor having a rotating shaft.

[Fourth Embodiment]
A dust remover according to a fourth embodiment will be described. FIG. 6 shows a configuration in which a foreign substance processing unit 2 in which a screen device and a crushing unit are stored is provided inside a housing K. In 1st Embodiment, the position of a screen apparatus and a crushing part is adjusted with the positioning pin of an installation frame, and it installs so that there may be no these clearance gaps. In 4th Embodiment, the screen apparatus and the crushing part are previously fixed inside the housing | casing K, and it can attach easily by installing this housing | casing K in a water channel.
The housing K can be easily installed by fitting the concave fitting piece provided in the housing K and the convex fitting piece provided on the side wall or the protruding portion of the housing.

Next, the attachment method of the dust removal apparatus 1 of this invention is demonstrated. The dust removing device 1 of the present invention is installed in an existing opening where a conventional dust removing screen and a rake device are installed. Here, the existing opening is one in which the length in the flow direction is shorter than the height from the bottom of the water channel to the lower end of the opening.
The dust remover 1 is installed in the housing through this opening. That is, the dust removing device 1 is suspended by an crane or the like above the existing opening, and the dust removing device 1 is lowered vertically to be introduced into the housing.
In the method for attaching the dust removing apparatus 1 of the present invention, the dust removing apparatus 1 is simply lowered vertically, so that it can be easily attached without having a high crane skill. The dust removing apparatus 1 may lower the crushing part and the discharge part all at once, or may separately attach the crushing part and the discharge part separately.

The dust removing apparatus of the present invention can be used for water treatment facilities such as a sand basin in a terminal sewage treatment plant. Moreover, the dust removal apparatus of this invention can replace the conventional dust removal screen using the opening part of the dust removal screen installed in the existing water treatment facility.
Furthermore, the dust removing device of the present invention has a small installation area, a compact configuration, and can suppress the off-flavor of the discharged impurities, so that not only the replacement of the dust removing screen of the existing water treatment facility, It may be used for a newly installed water treatment facility.

  DESCRIPTION OF SYMBOLS 1 Dust remover, 2 Contamination processing part, 3 Discharge part, 4 Screen apparatus, 6 Crushing part, 7 Screen part, 8 Transfer part, 9 Screen member, 11 Rake, 12 Rake shaft, 13 Vertical motor, 14 Inlet, 15 water flow guide plate, 16 discharge port, 17 rotary crushing blade, 18 vertical motor, 19 casing, 19a upper casing, 19b lower casing, 19c intermediate casing, 20 screw, 20a central opening, 21 discharge port, 22 vertical motor, 23 fixed shaft, 24 flange, 26 flange, 27 bottom member, 28 casing opening, 28a lower end, 28b upper end, 29 screen, 31 introduction part, 32 casing opening, 32a upper end, 33 casing opening, 34 first casing opening, 34a upper end 36 Opening of second casing, 90 water channel 90a bottom, 90b, 90c sidewall, 90d upper plate, 90e openings, 91 and 92 protrusion, 93 mounting frame, 94 container, G contaminants, K housing, W treatment water

Claims (7)

A crushing unit that is installed in a water channel and crushes impurities in the water to be treated flowing through the water channel;
A dust removing device that is disposed on the downstream side of the crushing part, and discharges the contaminants crushed by the crushing part from the treated water,
The dust remover characterized in that the height dimension of the dust remover is larger than the dimension in the flow direction. A housing that forms a waterway inside;
A water treatment facility comprising a dust removal device installed in the water channel through an opening provided in an upper portion of the housing,
The dust removing device includes a crushing unit that crushes impurities in the water to be treated flowing through the water channel,
A discharge unit that is disposed on the downstream side of the crushing unit and discharges the contaminants crushed by the crushing unit from the water to be treated.
The length of the flow direction of the opening part provided in the said housing is shorter than the height from the said water channel bottom face to the said opening part, The water treatment equipment characterized by the above-mentioned. A dust removing device installed in the water treatment facility according to claim 2,
The dust remover is inserted into the water channel from above the opening through the opening, and is set to a size that can be installed on the bottom of the water channel. It is a dust removal apparatus of Claim 3, Comprising:
When the dust removing device is installed on the bottom surface of the water channel, the height of the discharge part is larger than the height from the bottom surface of the water channel to the opening. It is a dust removal apparatus of Claim 3 or 4,
The dust removing device, wherein the discharging unit discharges the foreign matter onto the casing outside the opening. A water treatment in which a water channel is formed inside and a housing having an opening at the top is provided, and the length in the flow direction of the opening provided in the housing is set shorter than the height from the bottom of the water channel to the opening. An installation method for attaching a dust removing device to remove impurities in the water to be treated,
The dust removing device includes a crushing unit that crushes impurities in the water to be treated flowing through the water channel,
A discharge unit that is disposed on the downstream side of the crushing unit and discharges the contaminants crushed by the crushing unit from the water to be treated.
The dust removing device is installed in the housing through the opening. A method for attaching the dust removing device.   The method for attaching a dust removing device according to claim 6, wherein the opening is an attachment port for installing a dust removing screen.

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