JP2017127800A - Upflow type precipitator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an upflow type precipitator having an inclined flow channel unit 1 forming a plurality of inclined flow channels 12 inclined to a horizontal surface and a trough 3 flowing out a treated liquid from the supernatant layer of a liquid to be treated supplied below the inclined flow channel unit 1 and capable of effectively suppressing carry-over and being manufactured at a low cost.SOLUTION: In an upflow type precipitator,: a plurality of inclined flow channel units 1 are respectively arranged in a flat surface longitudinal direction and a lateral direction to a longitudinal direction; an inside is composed of a sleeve-like inclination box 2 forming an inclined flow channel 12; and a trough 3 is connected to a supernatant layer formed above the inclined flow channel 12 via an outflow port 10.SELECTED DRAWING: Figure 4

Description

  The present invention is an apparatus that settles and separates a suspension in a liquid to be processed under gravity, and uses an inclined channel unit that forms a plurality of inclined channels inclined with respect to a horizontal plane. The present invention relates to an upward flow type sedimentation separator that performs sedimentation while raising the inside of an inclined channel.

  The sedimentation method that separates suspensions (aggregates, flocs, sludge, etc.) in the liquid to be treated under gravity is economically advantageous and easy to operate. Widely applied to water and sewage treatment. Among them, a plurality of inclined channels inclined with respect to the horizontal plane are formed in the sedimentation tank by an inclined channel unit composed of a plurality of inclined plates or inclined tubes, and the sedimentation area is increased (that is, the processing amount is increased). A large number of sedimentation separation devices are also employed.

  2. Description of the Related Art Conventionally, in an upward flow type sedimentation separation apparatus using an inclined flow path unit composed of an inclined plate or an inclined pipe, the front part is the inflow side of the liquid to be treated in the settling tank, and the rear part (opposite side of the front part) is directed to. Then, for each pitch of the inclined plate or inclined tube, the supernatant layer formed above the inclined plate or inclined tube is partitioned by a baffle plate, and the treated liquid flows into the trough from each supernatant layer divided for each pitch. It is known that the configuration is made (see, for example, Patent Document 1). In this conventional apparatus, for example, due to a temperature change of the supplied liquid to be processed, the liquid to be processed concentrates on a part of the inclined channel unit and flows out without sufficient processing time. It is intended to suppress so-called carryover.

JP-A-61-136407

  In the case of the conventional upward flow type sedimentation separation apparatus, the liquid to be treated that has been concentratedly raised at the front part of the inclined channel unit flows down the rear part of the inclined channel unit through the supernatant layer. Effective in preventing carry-over.

  However, since the supernatant layer partitioned by the baffle plate is a series in the left-right direction with respect to the front-rear direction, the liquid to be treated that has risen on either the left or right side of the inclined channel unit is passed through the supernatant layer to the other end. Carry over due to the generation of a circulating flow that descends the side cannot be sufficiently suppressed. Further, since there is a gap leading to the supernatant layer between the side of the inclined channel unit and the side wall of the settling tank, it is not possible to prevent carryover due to the liquid to be treated rising through this gap.

  On the other hand, in the case of using the inclined channel unit constituted by the inclined tube, although stable sedimentation can be expected in the inclined tube, the inclined channel unit is configured as an aggregate of inclined tubes having a size of about 50 mm square. For this reason, there is a problem that the cost is increased and the weight of the inclined channel unit is increased.

  The present invention has been made in view of the above problems, and in an upward flow type sedimentation separation apparatus using an inclined channel unit, carryover can be effectively suppressed and can be manufactured at a lower cost. The purpose is to do so.

For the above purpose, the present invention provides an inclined channel unit that forms a plurality of inclined channels inclined with respect to a horizontal plane in the settling tank, and is supplied from the front of the settling tank to the lower side of the inclined channel unit. In the upward flow type sedimentation separation apparatus provided with a trough for discharging the treated liquid from the supernatant layer of the treated liquid,
A plurality of inclined flow path units are arranged in the front-rear direction and the left-right direction with respect to the front-rear direction, and the inside is composed of a sleeve-shaped inclined box that forms the inclined flow path, and the trough is formed above the inclined flow path. An upflow type sedimentation apparatus is provided which is connected to the supernatant layer through an outlet.

Further, in the present invention, the inclined box and the inclined channel have a rectangular shape whose cross-sectional shape orthogonal to the central axis is long in the left-right direction, and the trough is connected to only one side of the inclined channel in the left-right direction.
While the trough has a long bowl shape in the front-rear direction, only the left and right corners of the inclined box are notched, and the trough is fitted and fixed in this notch. An outlet is formed on the side wall of
The notch portions of the inclined boxes adjacent to each other in the left-right direction are opposed to each other, and a common trough is fitted into the two adjacent inclined boxes to be fixed in a liquid-tight manner. In addition, an outlet is formed on the side wall of the trough,
Each of the inclined boxes has an inner surface width in the front-rear direction of 50 to 100 mm and an inner surface length in the left-right direction of 500 to 1000 mm.
Is included as a preferred embodiment thereof.

  According to the present invention, the inclined channels are formed in the inclined boxes provided in the front-rear direction and the left-right direction, and the supernatant layer is formed above the inclined channels. The supernatant layer is partitioned in the left-right direction as well as the front-rear direction. For this reason, it is easy to suppress not only the circulation flow in the front-rear direction but also the circulation flow in the left-right direction, and the carry-over is more reliably suppressed. Further, since the supernatant layer is formed in the upper part of the inclined channel, the gap between the side portion of the inclined channel unit and the side wall of the sedimentation tank is blocked from the supernatant layer, and the liquid to be treated that rises in this gap Carryover due to can also be prevented. Furthermore, since at least the length in the left-right direction of the inclined box can be made larger than that of the inclined pipe, the number of inclined boxes is larger than the number of inclined pipes when the inclined flow path unit is constituted by the inclined pipe. The manufacturing cost and weight can be reduced.

It is sectional drawing which shows an example of the upward flow type sedimentation apparatus of this invention. (A) And (b) is a perspective view which respectively shows the inclination box single-piece | unit used for this invention. It is explanatory drawing of the combined state of an inclination box aggregate | assembly and a trough. It is explanatory drawing of the attachment state of the trough to an inclination box aggregate. (A) is a front view of the inclined box aggregate | assembly with which the trough was attached, (b) is A-A 'expanded sectional drawing in (a). It is a top view which shows an example of the inclined flow path unit which has a trough. It is a top view which shows the other example of the inclined flow path unit which has a trough.

  As shown in FIG. 1, the upward flow type sedimentation separation apparatus according to the present invention is provided with an inclined channel unit 1 in a sedimentation tank 6.

  The settling tank 6 is supplied with the liquid to be treated from the front. The front side wall of the settling tank 6 is a rectifying wall 4, and the liquid to be treated is supplied to the lower side of the ramp unit 1 from an inflow hole 5 provided in the rectifying wall 4. Examples of the liquid to be treated include solid-liquid mixed suspensions to be subjected to waterworks treatment, sewerage treatment, industrial wastewater treatment, and chemical industry manufacturing process treatment.

  In the example shown in FIG. 1, a rectifying plate 9 is provided below the inclined channel unit 1, and the water to be treated flows to the inclined channel unit 1 through the rectifying plate 9. ing. The rectifying plate 9 is composed of a perforated sheet or a perforated plate, and by providing this, the rise of the liquid to be treated can be made uniform, but this may be omitted to prevent sedimentation sludge from staying. it can.

  In the sedimentation tank 6, the inclined flow path unit 1 is installed suspended from a support beam 8 such as H-shaped steel. The inclined channel unit 1 can be installed on a gantry (not shown) provided in the settling tank 6, but if it is suspended as shown in the figure, the flow of the liquid to be treated by the gantry is disturbed. In addition, it is possible to prevent the sedimentation sludge from being discharged, and this is preferable.

  The inclined flow path unit 1 forms a plurality of inclined flow paths 12 inclined with respect to the horizontal plane in the settling tank 6, and will be described in detail later. Is an assembly of a plurality of inclined boxes 2 arranged in the plane front-rear direction and in the left-right direction with respect to the front-rear direction. Each inclined box 2 is provided so as to be inclined forward with respect to a horizontal plane.

  As shown in FIG. 2, the inclined box 2 has a sleeve shape in which the upper and lower sides are opened, and the inside forms an inclined flow path 12. The inclined box 2 and the inclined flow path which is the internal space thereof are preferably rectangular in which the cross-sectional shape orthogonal to the central axis is long in the left-right direction from the viewpoint of ease of arrangement and ease of securing the sedimentation area. . In such an inclined box 2 having a rectangular cross section, the inner surface width W in the front-rear direction is about the same as the interval between the normal inclined plates, and the inner surface length X in the left-right direction is a length that can easily suppress the circulation flow in the left-right direction. Is preferred. Specifically, the inner surface width W is preferably 50 mm to 100 mm, and the inner surface length X is preferably 500 mm to 1000 mm. The inclined length Y of the inclined box 2 can be selected according to the processing speed, the type of liquid to be processed, and the like, but is set to a length at which a supernatant layer is formed in the inclined flow path 12. Inclination length Y is usually preferably 500 mm to 2000 mm because the processing efficiency deteriorates if it is too long or too short.

  A trough 3 for allowing the treated liquid to flow out from the supernatant layer formed in the upper part of the inclined channel 12 is attached to the upper part of the inclined channel unit 1. The trough 3 has a long bowl shape in the front-rear direction, and is connected to a supernatant layer formed in the upper part of the inclined channel 12 via an outlet 10 described later. The trough 3 discharges the processed liquid flowing out from the supernatant layer into the trough 3 from an overflow outlet 7 provided at the rear part of the settling tank 6.

  The inclined box 2 and the trough 3 can be easily manufactured by, for example, extrusion molding using a synthetic resin such as hard vinyl chloride.

  The trough 3 can also be connected to the left and right sides of the inclined channel 12. However, the treated liquid tends to flow intensively on the trough on the side where it is easy to flow, and even if connected to both sides, it is difficult to function evenly. Therefore, in order to suppress the number of troughs 3 to be installed, the inclined channel 12 It is preferable to connect to only one of the left and right sides.

  The inclined box 2 of the present example has a cutout portion 11 in which either the left or right corner of the upper portion is cut into a bowl shape. As shown in FIGS. 2 (a) and 2 (b), the tilted box 2 has a notch portion 11 in the tilt direction, that is, the left upper corner portion toward the front, and the right side in the tilt direction. The one with the upper corner of the cutout is used.

  As shown in FIG. 3, when an assembly of a large number of tilted boxes 2 arranged in the front-rear direction in two rows on the left and right is described as one block, the tilted boxes 2 adjacent to each other in the left-right direction in one block 11 are facing each other. As shown in FIGS. 4 and 5, a single trough 3 common to the two adjacent inclined boxes 2 is fitted into and fixed to the notched portions 11 facing each other. The trough 3 is preferably fixed in a liquid-tight manner so that the mutual inflow of liquid in the adjacent inclined channels 12 can be suppressed. Further, outlets 10 are formed on both side walls of the trough 3. The outlet 10 is provided at a position corresponding to a supernatant layer formed in the upper part of the inclined flow path 12 that is an internal space of the inclined boxes 2 arranged in the left and right rows in the left and right rows. That is, if the aggregate | assembly of the 1 block of inclined boxes 2 as mentioned above and the attachment form of the trough 3 are shown, as shown in FIG. 4, the inclined flow path which arranged many inclined boxes 2 in the front-back direction in two right and left rows. A trough 3 is attached to the center of the unit 1 in the left-right direction, and the liquid that forms the supernatant layer of the inclined channel 12 in the left and right inclined boxes 2 flows out from the outlet 10 to one trough 3 as a processed liquid. 1 can be sent to the overflow outlet 7 shown in FIG.

  The outflow ports 10 can be formed with the same size and the same number for all the inclined channels 12 formed in the front-rear direction. However, in order to equalize the flow rate of the liquid to be processed that rises in each inclined channel 12, the opening area of the outlet 10 that opens to each inclined channel 12 can be sequentially increased from the front to the rear. preferable. Adjustment of an opening area can be performed by the magnitude | size or number of the outflow ports 10 provided with respect to the following inclined flow path 12. FIG.

  The inclined boxes 2 are joined to each other to constitute the inclined flow path unit 1. The inclined boxes 2 can be joined to each other mechanically using screws or the like, but can be easily performed with an adhesive. Also, the trough 3 can be joined mechanically, but it is easy to do with an adhesive.

  In the upward flow settling separator of the present invention, the state of FIG. 6 in which the trough 3 is attached to the inclined flow path unit 1 of the aggregate of the one block inclined box 2 is defined as one unit, and this is set to 1 in the left-right direction. Units or a plurality of units can be used side by side. In this case, an even number of inclined boxes 2 are arranged in the left-right direction.

  In addition, as shown in FIG. 7, the left-right direction is one row, and an aggregate of a large number of inclined boxes 2 arranged in the front-rear direction is made into one block, and the half width of the trough 3 described so far is formed on one side of the upper part. It is also possible to use a unit in which the troughs 3 'are connected as one unit. The inclined box 2 shown in FIG. 7 is shown in FIG. 2 (a). A large number of the inclined boxes 2 are arranged in the front-rear direction, and the trough 3 'is fitted in the notch 11 provided on the left side in the inclined direction. Is fixed. The mounting state of the trough 3 'is the same as the mounting state of the trough 3 already described. The trough 3 ′ has the trough 3 described above, except that the width is ½ and the outlet 10 (see FIGS. 3 to 5) is provided only on the side wall on the inclined channel 12 side. It is the same. When the inclined box 2 shown in FIG. 2B is used, the trough 3 'is positioned on the right side in the inclined direction. When the state of FIG. 7 in which the trough 3 ′ is attached to the inclined flow path unit 1 of the aggregate of the one-block inclined box 2 is set as one unit, this is combined with one unit or a plurality of units in FIG. This is an apparatus in which an odd number of inclined boxes 2 are arranged in the left-right direction. Only one unit shown in FIG. 7 can be used side by side in the left-right direction. However, since the number of troughs 3 'used is increased, it is preferably used in combination with one unit shown in FIG.

  In the upward flow type sedimentation separation apparatus according to the present invention, the suspension is settled and separated while the liquid to be treated supplied below the inclined channel unit 1 rises in each inclined channel 12. A supernatant layer is formed in the upper part of each inclined channel 12. Since the trough 3 (3 ′) is connected to each supernatant layer via the outlet 10, the liquid forming the supernatant layer flows out from the outlet 10 to the trough 3 (3 ′) as a processed liquid. It will be discharged from the overflow outlet 7. According to the present invention, since the supernatant layer is formed on the upper part of the inclined flow path 12 that is the internal space of each inclined box 2, the supernatant layer is partitioned in the left-right direction as well as the front-rear direction. For this reason, not only the circulation flow in the front-rear direction but also the circulation flow in the left-right direction can be easily suppressed, and a reduction in processing effect due to carry-over can be suppressed. Further, the supernatant layer is also blocked from the gap between the side portion of the inclined channel unit 1 and the side wall of the settling tank 6, and it is possible to prevent the processing effect from being lowered by the liquid to be treated that rises in this gap. it can. Furthermore, since at least the length in the left-right direction of the inclined box 2 can be made larger than that of the inclined pipe, the inclined box can be formed in comparison with the number of inclined pipes when the inclined flow path unit 1 is constituted by the inclined pipe. The number of 2 can be reduced and manufacturing cost and weight can be suppressed.

  1: inclined channel unit, 2: inclined box, 3, 3 ′: intake trough, 4: rectifying wall, 5: inflow hole, 6: settling tank, 7: overflow outlet, 8: support beam, 9: rectifying plate, 10: outlet, 11: notch, 12: inclined channel

For the above purpose, the present invention provides an inclined channel unit that forms a plurality of inclined channels inclined with respect to a horizontal plane in the settling tank, and is supplied from the front of the settling tank to the lower side of the inclined channel unit. In the upward flow type sedimentation separation apparatus provided with a trough for discharging the treated liquid from the supernatant layer of the treated liquid,
A plurality of inclined flow path units are arranged in the front-rear direction and the left-right direction with respect to the front-rear direction, and the inside is composed of a sleeve-shaped inclined box that forms the inclined flow path, and the trough is formed above the inclined flow path. Connected to the supernatant layer through the outlet ,
The inclined box and the inclined flow channel are in the shape of an oblique column having a rectangular surface that is long in the left-right direction, and the trough is connected only to one side of the inclined flow channel in the left-right direction.
While the trough has a long bowl shape in the front-rear direction, only the left and right corners of the tilted box are notched, and the trough is fitted into this notch and fixed in a liquid-tight manner. In addition, the present invention provides an upward flow settling separator characterized in that an outlet is formed in the side wall of the trough .

The present invention also have notched portion of the inclined boxes adjacent phase in the left right direction is opposed to the opposed been notches, with a common trough is fitted into two inclined box adjacent the phase The outlet is formed in the side wall of the trough while being fixed liquid-tightly,
Each of the inclined boxes has an inner surface width in the front-rear direction of 50 to 100 mm and an inner surface length in the left-right direction of 500 to 1000 mm.
Is included as a preferred embodiment thereof.

Claims (5)

In the sedimentation tank, it has been processed from the inclined channel unit that forms a plurality of inclined channels inclined with respect to the horizontal plane, and the supernatant layer of the liquid to be treated supplied from the front of the sedimentation tank to the lower side of the inclined channel unit In an upward flow type sedimentation separation device provided with a trough for flowing out the liquid,
A plurality of inclined flow path units are arranged in the front-rear direction and the left-right direction with respect to the front-rear direction, and the inside is composed of a sleeve-shaped inclined box that forms the inclined flow path, and the trough is formed above the inclined flow path. And an upper flow type sedimentation separation device connected to the supernatant layer through an outlet.   The inclined box and the inclined flow path are each a rectangle whose cross-sectional shape perpendicular to the central axis is long in the left-right direction, and the trough is connected to only one side of the inclined flow path in the left-right direction. The upward flow settling separator described.   While the trough has a long bowl shape in the front-rear direction, only the left and right corners of the tilted box are notched, and the trough is fitted into this notch and fixed in a liquid-tight manner. The upward flow settling separator according to claim 2, wherein an outlet is formed in the side wall of the trough.   The notch portions of the inclined boxes adjacent to each other in the left-right direction face each other, and a common trough is fitted and fixed to the two adjacent inclined boxes in the notched portions facing each other. The upflow type sedimentation separator according to claim 3, wherein an outflow port is formed on the side wall.   5. The upward flow settling according to any one of claims 2 to 4, wherein each of the inclined boxes has an inner surface width in the front-rear direction of 50 to 100 mm and an inner surface length in the left-right direction of 500 to 1000 mm. Separation device.

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