JP2020059026A - Inclined settling accelerating device - Google Patents

Abstract

To provide an inclined settling accelerating device in which suspended matters are hardly accumulated on a top surface of the device.SOLUTION: An inclined settling accelerating device 100 includes: inclined parts 10 with plural inclined flow channels 30 in which raw water is distributed in an upflow; and side plates 20 arranged on both sides of the inclined parts 10. A first inclined flow channel 30 has a first portion which forms the first inclined flow channel 30, and a second inclined flow channel 30 adjacent to the first inclined flow channel 30 has a second portion adjacent to the first portion and forming the second inclined flow channel 30. In the inclined settling accelerating device, there is no intersection part at a section where the first portion and the side plates 20 contact each other, and there is no intersection part at a section where the second portion and the side plates 20 contact each other. Further, upper side parts 15 of the inclined parts 10 and upper side parts 21 of the lateral plates 20 are positioned below the water surface.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an inclined sedimentation promoting device. More specifically, the present invention relates to an inclined settling promoting apparatus that obtains treated water by precipitating a suspended substance (SS: Suspended Solid) from raw water.

  BACKGROUND ART Conventionally, a water treatment facility for treating treated water (raw water) taken from, for example, a river is provided with a sedimentation basin, and an inclined sedimentation promoting device (hereinafter , Sometimes referred to as a "sedimentation device") is installed (see Patent Documents 1 to 3).

JP, 2009-45532, A JP, 2009-29987, A JP-A-5-200205

  By using a sedimentation device, suspended matter contained in raw water can be favorably precipitated and water treatment can be performed. However, the conventional sedimentation devices described in Patent Documents 1 to 3 have the following problems because of the structure in which suspended substances are easily deposited on the upper surface of the device.

(1) The sediment of the turbid substance blocks the flow path of the sedimentation device, and the removal performance of the sedimentation device deteriorates.
(2) Deposits are peeled off from the sedimentation device and mixed into the treated water, deteriorating the water quality.
(3) Chironomid and algae are generated from the sediment.
(4) Equipment must be regularly cleaned to prevent excessive accumulation of suspended solids.

  The present invention has been made in view of the above problems of the prior art, and provides an inclined sedimentation promoting device capable of preventing the accumulation of suspended substances on the upper surface of the device.

  According to the present invention, there is provided the inclined settling promoting device described below.

[1] An inclined portion having a plurality of inclined flow paths in which raw water flows in an upward flow,
And side plates arranged on both sides of the inclined portion,
The first inclined flow path has a first portion forming the first inclined flow path,
The second tilted flow path adjacent to the first tilted flow path has a second portion adjacent to the first portion that forms the second tilted flow path,
There is no intersection in the portion where the first portion and the side plate contact, and there is no intersection in the portion where the second portion contacts the side plate,
The inclined settling promoting device, wherein the upper side portion of the inclined portion and the upper side portion of the side plate are located below the water surface.

[2] The inclined portion is composed of a plurality of inclined plates,
The upper side portion of a part of the plurality of inclined plates is an upper side portion of the first and second portions and has a height position different from that of the upper side portion of the side plate. ] The inclination settling acceleration | stimulation apparatus of description.

[3] The inclined portion is composed of a plurality of rectangular tubular members,
An upper side portion of the rectangular tubular member, which is a part of the plurality of rectangular tubular members, is an upper side portion of the first and second portions and has a height position different from that of the upper side portion of the side plate. The inclined sedimentation promoting device according to [1].

[4] The inclined sedimentation promoting device according to any one of [1] to [3], wherein the upper side portion of the inclined portion is arranged at a position lower than the upper side portion of the side plate.

[5] A plurality of the inclined portions arranged in parallel are provided,
The inclined settling promoting device according to any one of [1] to [4], wherein the inclined portions that are adjacent to each other with the side plate interposed therebetween are arranged so as to be displaced from each other along the longitudinal direction of the side plate.

  According to the inclined sedimentation promoting apparatus of the present invention, it is possible to effectively prevent the suspension substance from accumulating on the upper surface of the apparatus. As a result, the flow path of the device is less likely to be blocked, and the removal performance of the device can be favorably maintained. In addition, the labor of cleaning the device can be omitted or reduced.

It is a perspective view which shows typically one Embodiment of the inclination settling acceleration | stimulation apparatus (1st invention) of this invention. It is sectional drawing which shows typically the state which looked at one Embodiment of the inclination settling promotion apparatus of this invention from the side surface. It is a top view which shows typically the state which looked at one embodiment of the inclination settling promotion apparatus of this invention in the extending direction of a side plate. It is a perspective view which shows typically other embodiment of the inclination settling promotion apparatus of this invention. It is a perspective view which shows typically other embodiment of the inclination settling promotion apparatus of this invention. It is a perspective view which shows typically other embodiment of the inclination settling promotion apparatus of this invention. It is a perspective view which shows typically one Embodiment of the inclination settling acceleration | stimulation apparatus (2nd invention) of this invention. It is a top view which shows typically the state which looked at one Embodiment of the inclination settling promotion apparatus (2nd invention) of this invention from the upper side part side. It is a perspective view which shows typically other embodiment of the inclination settling promotion apparatus of this invention. It is a top view which shows typically the state which looked at another embodiment (embodiment shown in FIG. 9) of the inclination settling promotion apparatus of this invention from the upper side part side. It is a perspective view which shows typically other embodiment of the inclination settling promotion apparatus of this invention. It is a top view which shows typically the state which looked at further another embodiment (embodiment shown in FIG. 11) of the inclination settling promotion apparatus of this invention from the upper side part side. It is a perspective view which shows typically other embodiment of the inclination settling promotion apparatus (1st invention) of this invention. It is a perspective view which shows typically other embodiment of the inclination settling promotion apparatus (1st invention) of this invention. It is a perspective view which shows typically other embodiment of the inclination settling promotion apparatus (1st invention) of this invention. It is a perspective view which shows typically other embodiment of the inclination settling promotion apparatus (1st invention) of this invention. It is explanatory drawing which shows typically the water treatment system provided with an inclination settling apparatus. It is a perspective view which shows the conventional inclined sedimentation promotion apparatus typically. It is sectional drawing which shows typically the state which looked at the conventional inclination settling apparatus from the side plate side. It is sectional drawing which shows typically the state which looked at the conventional inclination settling apparatus from the side plate side. It is a top view which shows typically the state which looked at the conventional inclination settling promotion apparatus from the upper side part side.

  Hereinafter, embodiments of the present invention will be described. The present invention is not limited to the following embodiments, and appropriate modifications and improvements are made to the following embodiments on the basis of ordinary knowledge of those skilled in the art without departing from the spirit of the present invention. It should be understood that those provided are also within the scope of the present invention.

  First, the new knowledge of the present inventor found regarding the problems of the prior art will be described. The present inventor has examined the above-mentioned problems of the conventional technique from various angles. As shown in FIG. 21, in the conventional sedimentation device 1, the upper side portion of the side plate 20 and the upper side portion of the inclined portion 10 are in the same plane. It is located on the upper side, and the upper side of the side plate 20 and the upper side of the inclined portion 10 intersect in a cross shape (that is, the intersection of the side plate 20 and the inclined portion 10 has four flow passages (inclined flow passage)). It has been found that the following phenomenon occurs due to (surrounded by 30). That is, the suspended substance is easily deposited at the intersection of the side plate 20 and the inclined portion 10 (for example, the area surrounded by a circle in FIG. 21), and the suspended substance deposit 55 grows from this intersection. I found out that The "gradient flow path" may be simply referred to as "flow path" hereinafter.

  The above phenomenon will be described in more detail with reference to the drawings. 18 to 21 are drawings schematically showing a conventional inclined sedimentation promoting device. The conventional settling device 2 includes a plurality of settling devices 1 shown in FIG. 18, and these settling devices 1 are arranged in parallel. The sedimentation device 1 shown in FIG. 18 includes the inclined portion 10 and the side plate 20, and the upper side portion 21 of the side plate 20 and the upper side portion 15 of the inclined portion 10 are located on the same plane.

  In the sedimentation device 2, the raw water 151 is supplied to the flow path 30 from the lower end surface of the sedimentation device 2 and flows out as treated water from the upper end surface. At this time, most of the treated water that has flowed out is collected by the water collecting trough arranged above, but when a part of the treated water causes a downward flow X as shown in FIG. Conceivable. Then, as in the sinking device 2, the upper side part 15 of the inclined part 10 and the upper side part 21 of the side plate 20 are at the same height position (that is, the upper side part 21 of the side plate 20 and the upper side part 15 of the inclined part 10 are on the same plane). 21), as shown by the arrows in FIG. 21, the descending flows X from the four flow paths (that is, four directions (all directions)) gather at each intersection. At this time, the suspended substance floating around the outlet in the flow path 30 is entrained in the descending flow X and lands at the intersection. Another suspended substance caught in the downward flow X is caught on the landed suspended substance, and the deposition is gradually increased. From the above, it is considered that in the conventional settling device 2, the suspended substance is easily deposited at the intersection portion thereof, and the deposit 55 is easily formed.

  As described above, since each crossing portion in the conventional settling device is a portion (suspended portion) on which the suspended substance can be stably landed, the suspended substance is easily deposited and the deposit 55 (see FIG. 19) is formed. easy. When the deposit 55 grows, the following problems will occur. That is, as the deposit 55 grows, the opening area of the opening on the outlet side of the flow path becomes smaller. When the opening area of the opening becomes small in this way, the flow velocity of the treated water flowing out from this flow path becomes high, and the suspended solids flow out vigorously together with the treated water. Therefore, the treated water is contaminated by the suspended solids that are vigorously discharged together with the treated water, or the suspended solids are deposited on the upper surface of the apparatus to further grow the deposit. Thereafter, the deposit will eventually grow until it completely blocks the outlet side opening of some of the flow paths. When the openings of some of the channels are completely blocked, the inflow amount of raw water flowing into the unblocked channels increases. As a result, the sedimentation removal rate of the entire device is reduced.

  The present inventor, in order to solve the problem in such a conventional settling device, as a result of intensive studies, by making the height positions of the upper side part of the inclined part and the upper side part of the side plate of the settling device different, We have found that we can solve these problems. That is, according to the present invention, the intersection of the side plate and the inclined portion is eliminated or reduced as compared with the conventional settling device. In the conventional settling device, since the descending flows from the four directions gather at each intersection, suspended substances were easily accumulated at these intersections. If the height positions of the side plates are made different from each other, for example, as shown by the arrows in FIG. 10, only the descending flows from the two flow paths (that is, two directions) arranged in the longitudinal direction of the side plates gather. Become. As a result, even when suspended matter that has drifted near the outlet in the flow path is caught in the downward flow, it becomes more difficult for suspended matter to accumulate at the intersections compared to conventional sedimentation devices, and The deposit 55 is less likely to be formed.

  Hereinafter, the inclined sedimentation promoting device of the present invention will be specifically described.

[1] Inclined sedimentation promoting device (first invention):
FIG. 1 is a perspective view schematically showing an embodiment of an inclined sedimentation promoting device (first invention) of the present invention. FIG. 2 is a cross-sectional view that schematically shows a state in which one embodiment of the inclined sedimentation promoting device of the present invention is viewed from the side. FIG. 3 is a plan view schematically showing an embodiment of the inclined sedimentation promoting device of the present invention as viewed in the direction in which the side plates extend.

  One embodiment of the inclined sedimentation promoting device according to the first invention is the inclined sedimentation promoting device 100 shown in FIGS. 1 to 3. The inclined sedimentation promoting device 100 includes an inclined portion 10 having a plurality of inclined flow passages 30 through which raw water flows, and side plates 20 arranged on both sides of the inclined portion 10. Then, in the inclined settling promotion device 100, the upper side portion (upper end surface) 15 of the inclined portion 10 is located lower than the upper side portion (upper end surface) 21 of the side plate 20. That is, in the inclined sedimentation promoting device 100, the upper side portion (upper end surface) 15 of the inclined portion 10 is different in height position from the upper side portion (upper end surface) 21 of the side plate 20. The inclined flow channel 30 is a space that extends from the lower end surface 11 that is one end surface to the upper end surface 12 that is the other end surface, and in which raw water containing suspended substances flows.

  In the inclined settling promoting device of the present invention, the upper side portion (upper end surface) of the inclined portion may be different in height position from the upper side portion (upper end surface) of the side plate. As in 105, the upper side portion (upper end surface) 15 of the inclined portion 10 may be positioned higher than the upper side portion (upper end surface) 21 of the side plate 20.

  In the inclined sedimentation promoting device 100, the problem that the suspended substance is excessively accumulated and grows on the upper end surface 12 to cause the discharge port of the flow path to be blocked and the removal performance to be reduced is solved. Further, the problem that the deposit 55 is peeled off and mixed into the treated water to deteriorate the water quality is solved. Further, it is possible to prevent the problem that chironomids, algae and the like are generated from the deposit. Further, the labor for cleaning the deposit 55 can be omitted or reduced.

  The inclined settling promoting apparatus of the present invention is installed in the settling tank 50 and used like the inclined settling promoting apparatus 200 shown in FIG. As shown in FIG. 17, the raw water 51 is supplied to the sedimentation basin 50, enters the channel from below the inclined sedimentation promoting device 200, and exits upward. At that time, the suspended matter in the raw water is separated from the raw water by settling on the inclined surface 40 of the inclined portion 10 (see FIG. 1, FIG. 2, etc.). The raw water from which the suspended solids have been removed flows out of the sedimentation basin 50 from the water collection trough 52 as treated water.

  Next, each component of the inclined sedimentation promoting device of the present invention will be described.

[1-1] Inclined part:
The inclined portion is not particularly limited as long as it has a plurality of inclined passages through which raw water flows, but at least one of a plate-shaped inclined plate having an inclined surface and a tubular inclined tube (rectangular tubular member) having an inclined surface. Can consist of: When the inclined portion and the side plate are integrally molded, the inclined portion is preferably an inclined plate. This is because the inclined sedimentation promoting device can be easily manufactured. Further, when the inclined portion and the side plate are formed separately and are joined to each other to manufacture the inclined settling promoting device, the inclined portion is preferably an inclined pipe. This is because it is necessary to fix the inclined portion and the side plate to each other, but by using the inclined pipe, the inclined portion and the side plate can be fixed (joined) well. This is also because the inclined tube has higher strength than the inclined plate.

  1 to 3 show an inclined sedimentation promoting device 100 including an inclined portion 10 composed of a plurality of (six) inclined plates 16. When the inclined plate whose upper side is lower than the upper side (upper end surface 21) of the side plate 20 of the inclined plate 16 is referred to as “short inclined plate 17”, the inclined settling promoting device 100 includes all the inclined plates. Reference numeral 16 denotes a short inclined plate 17, and the upper side portion (upper end surface 17a) of the short inclined plate 17 is located at a position lower than the upper side portion (upper end surface 21) of the side plate 20. In such an inclined settling promoting apparatus 100, since there is no intersection of the upper side portions, the landing portion of the suspended solid (SS) is reduced and the starting point of growth of the deposit 55 is reduced. Therefore, it is possible to prevent the deposit 55 from growing before the opening on the outlet side of the flow path is closed. Further, the labor for cleaning the deposit 55 can be omitted or reduced. The inclined plate 16 is not limited to a flat plate, and may be a plate whose horizontal cross section is V-shaped or polygonal.

  FIG. 4 shows an inclined sedimentation promoting device 101 including an inclined portion 10 composed of a plurality of (three) inclined tubes 18. When the inclined pipe whose upper side portion is lower than the upper side portion (upper end surface 21) of the side plate 20 of the inclined pipe 18 is referred to as “short inclined pipe 19”, this inclined sedimentation promoting device 101 includes all the inclined pipes. Reference numeral 18 denotes a short inclined pipe 19, and the upper side portion (upper end surface 19a) of the short inclined pipe 19 is located at a position lower than the upper side portion (upper end surface 21) of the side plate 20. Such an inclined sedimentation promoting device 101 has the same effect as the above-described inclined sedimentation promoting device 100.

  The outer peripheral shape of the inclined pipe 18 is not particularly limited, and may be, for example, a quadrangular prism as shown in FIG. 4 or the like, and the inclined pipe has a rhomboidal cross section orthogonal to the extending direction of the inclined pipe. The cross section perpendicular to the direction may have other shapes such as a chevron-shaped (inverted V-shaped) columnar shape and a hexagonal columnar shape.

  The number of inclined plates and inclined tubes is not particularly limited and can be set appropriately. Further, the number of "short-side inclined plate" and "short-side inclined pipe" is not particularly limited and can be set appropriately.

  The inclined sedimentation promoting device of the present invention is preferably arranged in parallel according to the size of the sedimentation tank 50. An example of such a device is the inclined sedimentation promoting device having any of the features shown in FIGS. 1 to 4 described above. For example, the inclined sedimentation promoting device 401 shown in FIGS. 11 and 12 is an example including a plurality of inclined portions 10 arranged in parallel. As in the example, one side plate may be located between the adjacent inclined portions.

  In addition, "arranged in parallel" means that the sedimentation basins 50 are arranged adjacent to each other in a direction perpendicular to the flow direction of raw water from the upstream side to the downstream side.

  Further, as shown in FIGS. 11 and 12, in the inclined settling promoting device of the present invention, the upper side portions 15 of all the inclined portions 10 are located lower than the upper side portions 21 of the side plates 20, and the side plates 20 are It is preferable that the inclined pipes 18 (short inclined pipes 19) of the inclined portions 10 that are adjacent to each other in a sandwiched manner are arranged in a staggered manner in the longitudinal direction of the side plate 20. In such an inclined settling promoting device 401, as shown in FIGS. 11 and 12, the inclined pipes 18 of the inclined portions 10 that are adjacent to each other with the side plate 20 interposed therebetween are arranged in a staggered manner in the longitudinal direction of the side plate 20. , Good strength can be obtained.

  The phrase "the inclined pipes of the inclined portions that are adjacent to each other with the side plate sandwiched therebetween are arranged in a staggered manner in the longitudinal direction of the side plate" means that the inclined pipes are arranged as follows. That is, one slanted portion and another slanted portion adjacent to the one slanted portion are each configured by a plurality of slanted pipes arranged in the flow direction of the raw water, and the slanted sedimentation promoting device is seen through from the side plate side. . At this time, it means that, between the inclined pipes forming the one inclined portion, the inclined pipes forming the other inclined portions adjacent to the one inclined portion are arranged.

  It should be noted that, assuming that the inclined sedimentation promoting device 101 shown in FIG. 4 is one unit, the inclined sedimentation promoting device 401 can be said to be provided with a plurality of these units, and these units are arranged in parallel. Here, the inclined sedimentation promoting device 401 is configured by fixing the adjacent inclined sedimentation promoting devices 101 with their side plates 20 in common. That is, there is one side plate 20 between the inclined portions 10 of the adjacent inclined sedimentation promoting devices 101. Thus, as an example of the inclined sedimentation promoting device having a plurality of inclined portions arranged in parallel and having one side plate between the inclined portions 10 of the adjacent inclined sedimentation promoting devices 101, FIG. The inclined settling promoting device 401 shown in FIG. 12 may be mentioned, but as shown in FIG. 5, the side plates between the inclined portions 10 of the adjacent inclined settling promoting devices 101 by simply connecting the inclined settling promoting devices 101. It may be a device in which 20 is two.

  The inclined settling promoting apparatus 201 shown in FIG. 6 is inclined except that the inclined tubes 18 (inclined portions 10) on both sides of one side plate 20 are arranged at the same position on a line orthogonal to the side plate 20. It has the same configuration as the sedimentation promoting device 401. Such an inclined sedimentation promoting device 201 has the same effect as the above-described inclined sedimentation promoting devices 100 and 101.

  As the material of the inclined plate and the inclined tube, polyethylene terephthalate (PET), polyvinyl chloride (PVC), stainless steel (SUS), etc. can be adopted.

[1-2] Side plate:
The side plates 20 are arranged on both sides of the inclined portion 10, and are specifically flat plate-shaped members arranged so as to sandwich the inclined portion 10. As the side plate 20, a conventionally known one can be appropriately selected and used. The side plate 20 is fixed to the inclined portion 10 by being adhered to each other, or is integrally molded with the inclined portion 10 to support the inclined portion 10.

[2] Inclined sedimentation promoting device (second invention):
One embodiment of the inclined sedimentation promoting device according to the second invention is an inclined sedimentation promoting device 300 shown in FIGS. 7 and 8. This inclined settling promoting device 300 has a plurality of inclined flow paths 30 through which raw water flows, and is provided with a plurality of inclined portions 10 arranged in parallel and side plates 20 arranged on both sides of the inclined portions 10. ing. The inclined portions 10 that are adjacent to each other with the side plate 20 sandwiched therebetween are arranged along the longitudinal direction of the side plate 20 while being offset from each other.

  In this inclined settling promotion device 300, the upper end surface of the side plate 20 and the upper end surface of the inclined portion 10 are located on the same plane, but the upper side portion of the side plate 20 and the upper side portion of the inclined portion 10 intersect in a cross shape. I haven't. Specifically, the upper side portion of the side plate 20 and the upper side portion of the inclined portion 10 intersect in a T shape. Therefore, SS is less likely to be deposited at this intersection, and the deposit 55 (see FIG. 19 and the like) is less likely to be formed. That is, the intersection of the side plate 20 and the inclined portion 10 is not surrounded by the four flow paths (specifically, as shown by the arrows in FIG. 8, the intersection has three flow paths (four flow paths). Surrounded by one less than the road). In such an inclined settling promoting apparatus 300, the area of the intersecting section is increased as compared with the above-described inclined settling promoting apparatus 100, but the area of the intersecting section is reduced as compared with the conventional settling apparatus. Therefore, as in the case of the inclined settling promoting apparatus of the first invention, even when the suspended substance drifting around the outlet in the flow path is caught in the downward flow of the treated water, the suspended substance is caught at the intersection. The situation becomes difficult to occur. As a result, it is possible to prevent the suspended matter from excessively depositing at the intersecting portion to form the deposit 55, and to exert an effect substantially similar to that of the inclined sedimentation promoting device 100.

  Among the constituent elements of the inclined settling promoting apparatus according to the second invention, the same constituent elements as those of the inclined settling promoting apparatus according to the first invention are the same as those of the inclined settling promoting apparatus according to the first invention. Can be appropriately adopted. For example, the inclined portion 10 of the inclined sedimentation promoting device 300 shown in FIG. 7 is made of a rectangular tubular member, but may be an inclined plate as shown in FIG.

  The size (dimension) of the inclined sedimentation promoting device of the present invention (the first invention and the second invention) is not particularly limited, and the size (dimension) of a conventionally known inclined sedimentation promoting device is appropriately adopted. can do.

[3] Still another embodiment:
The inclined sedimentation promoting device 400 shown in FIGS. 9 and 10 is a form in which the features of the first invention and the second invention described above are combined. That is, the inclined settling promotion device 400 has a plurality of inclined flow paths 30 through which raw water flows, and has a plurality of inclined portions 10 arranged in parallel and side plates 20 arranged on both sides of the inclined portions 10. I have it. In addition, in the inclined settling promotion device 400, the upper side portions 15 of all the inclined portions 10 are located at a position lower than the upper side portions 21 of the side plates 20. They are arranged offset from each other along the longitudinal direction. In such an inclined settling promoting apparatus 400, in addition to the effect of the inclined settling promoting apparatus 100, both of the effects of the inclined settling promoting apparatus 300 are exhibited.

  FIG. 13 shows an inclined sedimentation promoting device 102 including an inclined portion 10 composed of a plurality of (six) inclined plates 16. The center two of the six inclined plates 16 are the short inclined plates 17, and the upper side portion (the upper end surface 17a) of the short inclined plate 17 is the upper side portion (the upper end surface 21) of the side plate 20. In a lower position.

  FIG. 14 shows an inclined settling promotion device 103 including an inclined portion 10 composed of a plurality of (six) inclined plates 16. Then, in the inclined settling promotion device 103, the short inclined plates 17 and the normal inclined plates 16 other than the short inclined plates 17 are alternately arranged.

  FIG. 15 shows an inclined settling promoting device 104 including an inclined portion 10 composed of a plurality of (three) inclined tubes 18. Then, one of the three inclined tubes 18 at the center is a short inclined tube 19, and the upper side portion (upper surface 19a) of this short inclined tube 19 is the upper side portion (upper surface 21) of the side plate 20. In a lower position.

  As shown in FIGS. 13 to 15, it is also within the scope of the present invention that the upper side portion of at least a part of the inclined portion (the inclined plate or the inclined pipe) is located lower than the upper side portion of the side plate. By configuring the inclined portion in this way, in the inclined sedimentation promoting devices 102, 103, 104, the area of the intersecting portion is increased as compared with the above-described inclined sedimentation promoting device 100, but in comparison with the conventional device. Since the area of the intersecting portion is reduced, the same effect as the above can be obtained.

[4] Manufacturing method:
The method for manufacturing the inclined sedimentation promoting device of the present invention (first invention and second invention) is not particularly limited, and a conventionally known method for manufacturing the inclined sedimentation promoting device can be appropriately adopted. Specifically, the inclined settling promoting apparatus of the present invention can be manufactured by forming the inclined portion by injection molding, extrusion molding or the like, and then fixing the inclined portion to the flat side plate with a bonding agent or the like. . As another method, there is a method of integrally molding the side plate and the inclined portion by a method such as injection molding or extrusion molding.

  The inclined sedimentation promoting device of the present invention can be used as a sedimentation device installed in a sedimentation tank.

1, 2: settling device, 10: inclined part, 11: lower end face, 12: upper end face, 15: upper side part of inclined part (upper end face of inclined part), 16: inclined plate, 17: short side inclined plate, 17a : Upper end surface of the short inclined plate, 18: Inclined tube, 19: Short inclined tube, 19a: End surface of the short inclined tube, 20: Side plate, 21: Upper side of side plate (upper surface of side plate), 30: Inclined Flow path, 40: inclined surface, 50: sedimentation tank, 51, 151: raw water, 52: collecting trough, 55: sediment, 100, 101, 102, 103, 104, 105, 200, 201, 300, 400, 401: inclined settling promotion device, X: downflow.

Claims (5)

An inclined portion having a plurality of inclined flow paths in which raw water flows in an upward flow,
And side plates arranged on both sides of the inclined portion,
The first inclined flow path has a first portion forming the first inclined flow path,
The second tilted flow path adjacent to the first tilted flow path has a second portion adjacent to the first portion that forms the second tilted flow path,
There is no intersection in the portion where the first portion and the side plate contact, and there is no intersection in the portion where the second portion contacts the side plate,
The inclined settling promoting device, wherein the upper side portion of the inclined portion and the upper side portion of the side plate are located below the water surface. The inclined portion is composed of a plurality of inclined plates,
The upper side part of the inclined plate, which is a part of the plurality of the inclined plates, is the upper side part of the first and second portions, and the height position is different from the upper side part of the side plate. The inclined sedimentation promoting device according to. The inclined portion is composed of a plurality of rectangular tubular members,
An upper side portion of the rectangular tubular member, which is a part of the plurality of rectangular tubular members, is an upper side portion of the first and second portions and has a height position different from that of the upper side portion of the side plate. The inclined sedimentation promoting device according to claim 1.   The inclined sedimentation promoting device according to claim 1, wherein the upper side portion of the inclined portion is arranged at a position lower than the upper side portion of the side plate. A plurality of the inclined portions arranged in parallel,
The inclined settling promoting device according to claim 1, wherein the inclined portions that are adjacent to each other with the side plate interposed therebetween are arranged so as to be displaced from each other along the longitudinal direction of the side plate.

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