KR20200133770A - Punching metal drum screen device - Google Patents

Abstract

The punching metal drum screen device 100 has a cylindrical cylinder portion 10 having a central axis 10A disposed in a substantially horizontal direction and a wall surface formed of punching metal, and a first closure for closing one end of the cylinder portion 10. The plate 20B, the treatment liquid introduction pipe 11 for supplying the treatment liquid through the first closing plate 20B, and a supply unit 17 connected to the treatment liquid introduction pipe 11 to receive the treatment liquid. ), a second closing plate (20A) for closing the other end side of the cylinder portion (10), support bodies (12a, 12b) rotatably supporting the cylinder portion (10) around the central axis (10A), and the cylinder portion It has a drive means 13 for rotating (10). The supply unit 17 changes the flow of the liquid to be treated to the outer side in the radial direction of the cylinder and disperses it, and causes the liquid to be treated to fall on a wall surface including at least the vicinity of the first closing plate 20B.

Description

Punching metal drum screen device

The present invention relates to a drum screen device formed of punched metal. This application claims priority to patent application 2018-100938 for which it applied on May 25, 2018, and the contents are incorporated herein.

Organic wastewater such as feces and septic tank sludge are treated in a sludge regeneration treatment facility. In a sludge regeneration treatment facility, in order to improve the efficiency of treatment of organic wastewater, a treatment for separating fibrous content from the organic wastewater or a treatment for concentration of sludge is performed.

For example, in the prior art described in Patent Literature 1 and Patent Literature 2, fibers contained in sludge are separated by a fiber removal device provided with a drum screen formed of a wedge wire or punched metal.

On the other hand, in the prior art described in Patent Document 3 and Patent Document 4, sludge concentration is performed by a sludge concentrating device provided with a drum screen formed of wedge wire or punched metal.

Japanese Patent Laid-Open Publication No. Hei-Sung 10-192615 Korean Patent Publication No. 10-0904283 Japanese Unexamined Patent Publication No. 2007-330920 Japanese Laid-Open Patent Publication No. 2002-177712

Conventionally, when supplying a liquid to be treated to a drum screen having a plurality of through holes, in order to avoid contamination of other devices disposed outside the drum screen due to leakage of the liquid to be treated, the end of the drum screen is In order to avoid this, the liquid to be treated is supplied to the inside, and for this reason, the effective length of the drum screen cannot be sufficiently utilized, and there is a concern that the drum screen becomes large. In addition, since the liquid to be treated is concentrated and dropped at one location of the drum screen with substantially the same dimensions as the opening of the pipe supplying the liquid to be treated, the flow rate of the liquid to be treated per through hole of the drum screen becomes excessive. There was a concern that the liquid to be treated could not be properly treated.

This invention has been made in view of the above-described circumstances, making it possible to miniaturize the device by maximizing the effective length of the drum screen, while reducing the flow rate of the liquid to be treated falling onto the drum screen to appropriately reduce the liquid to be treated. It provides a punched metal drum screening device that makes it possible to process.

The punching metal drum screen apparatus of the present invention includes a cylindrical cylinder portion having a central axis disposed in a substantially horizontal direction and a wall surface formed of punching metal, and a first closing plate for closing one end side of the cylinder portion except for the vicinity of the central axis. And, a treatment liquid introduction pipe disposed on the central axis to supply a treatment liquid through the first closing plate, a supply part connected to the treatment liquid introduction pipe to receive the treatment liquid, and the cylinder part. A second closing plate for closing the other end, a support body for rotatably supporting the cylinder portion around the central axis, and a driving means for rotating the cylinder portion, and the wall surface except for the vicinity of the second closing plate A plurality of holes are formed in the wall surface in the vicinity of the second closing plate, a plurality of lump-shaped discharge ports larger than the holes are formed, and the supply part is a substantially trapezoidal guide plate and the substantially trapezoidal base. A current-changing plate connected to a side other than (底邊) is provided, and the flow of the liquid to be treated is changed to the outer side in the radial direction of the tube portion, and the liquid to be treated is transferred on the guide plate. It is characterized in that the dispersed liquid is dropped from the bottom to the wall surface including at least the vicinity of the first closing plate.

According to this configuration, since the processing target liquid can be processed from the end of the cylinder, the punching metal drum screen device can be downsized. In addition, since the liquid to be treated is dispersed by the current flow plate and the guide plate of the supply section and then the liquid to be treated is dropped onto the wall of the cylinder, the contact area between the liquid to be treated and the wall of the cylinder is increased, and the liquid to be treated for each hole. By reducing the flow rate of, the liquid to be treated can be appropriately treated.

In the punching metal drum screen device, the liquid to be treated is sludge containing fibers, the supply part drops the liquid to be treated on the wall of the cylinder part moving upward by rotation, and the driving means rolls the fibers inside the cylinder part. It may be configured to rotate the cylinder portion at a rotational speed to be grown. According to this configuration, since the punching metal drum screen device is self-cleaning, it is not necessary to normally perform cleaning work for removing clogging of the drum screen, and it is also necessary to separately install a cleaning device such as a brush. Therefore, it is possible to provide an excellent punching metal drum screen device from the viewpoint of manufacturing cost and maintenance cost.

In the punching metal drum screen apparatus, the liquid to be treated is sludge mixed with a coagulant, and the driving means is configured to rotate the cylinder at a rotational speed that does not grow the liquid to be treated in a roll shape inside the cylinder. good.

According to this configuration, it becomes possible to increase the contact area between the liquid to be treated and the wall surface of the cylinder portion, thereby efficiently concentrating the sludge.

Further, in the punching metal drum screen device, a flow sensor for detecting the water flow rate of the liquid to be treated and a flow rate adjusting means provided in the liquid introduction pipe are provided in the discharge pipe through the lump-shaped substance discharge port, and the detection value of the flow sensor is When it is larger than the predetermined value, the flow rate adjustment means may be controlled to reduce the supply amount of the liquid to be treated, or a control device may be further provided to increase the rotational speed of the cylinder by controlling the drive means.

According to this configuration, when the liquid to be treated is supplied more than necessary or the rotational speed of the cylinder is too slow, the control device automatically adjusts the supply amount of the liquid to be treated or the rotational speed of the cylinder to the optimum, In applications such as fiber removal or sludge concentration, the liquid to be treated can be appropriately treated.

Advantageous Effects of Invention According to the present invention, a punching metal that makes it possible to reduce the size of the device by maximizing the effective length of the drum screen, and to properly treat the liquid to be treated by reducing the flow rate of the liquid to be treated falling onto the drum screen It becomes possible to provide a drum screen device.

1 is a schematic configuration diagram showing a punching metal drum screen device of the present invention.
Fig. 2 is a perspective view showing a supply unit connected to the tip of the liquid introduction pipe to be treated.
3 is a cross-sectional view of a supply unit taken along line III-III of FIG. 1.
4 is a schematic configuration diagram showing a punching metal drum screen device of a modified example.

A punching metal drum screen device 100 (hereinafter referred to as a drum screen device 100) according to an embodiment of the present invention will be described with reference to FIGS. 1 to 3. In addition, the drum screen device 100 can be used as a fiber removal device or a sludge thickening device.

1 is a schematic configuration diagram showing a drum screen device 100 of the present invention. The drum screen device 100 has a cylindrical cylindrical portion 10 provided with closing plates 20A, 20B at both ends, and a straight pipe shape for introducing a liquid A to be treated into the interior of the cylindrical portion 10 It is connected to the front end of the treatment target liquid introduction pipe 11 and the treatment target liquid introduction pipe 11 to change the flow of the treatment target liquid A, and rotatably support the cylinder part 10 It has the support 12 (12a and 12b) and the drive means 13 which rotates the cylinder part 10 in one direction.

The cylindrical portion 10 is a cylindrical body in which the wall surface 14 is formed of punched metal. The central axis 10A (virtual axis) of the cylindrical portion 10 is disposed in a substantially horizontal direction. As shown in FIG. 1, the cylinder portion 10 includes a treatment liquid introduction part α into which the treatment liquid A is introduced, and part of the moisture (sludge or moisture W) from the treatment liquid A Three of the separated liquid discharge part (β) to be removed, and the lump-shaped substance discharge part (γ) for discharging the lump-like substance (S) from which sludge or moisture has been removed from the treatment liquid (A) in the separated liquid discharge part (β). It is divided into parts. That is, the total length of the cylinder portion 10 is the sum of the lengths along the central axis 10A of the processing target liquid introduction portion α, the separated liquid discharge portion β, and the lump-shaped substance discharge portion γ.

In addition, when the drum screen device 100 is used as a fiber removal device, the liquid to be treated (A) is sludge containing fibers, and the lump-shaped material (S) is fibers. In addition, when the drum screen device 100 is used as a sludge concentrating device, the liquid to be treated A is sludge into which a coagulant is injected, and the lump-shaped material S is a concentrated sludge.

As the cylinder portion 10 rotates, the treatment liquid A introduced into the treatment liquid introduction part α is sludge or water (W) from the treatment liquid introduction part α toward the lump-shaped material discharge part γ. It proceeds as it is gradually removed. On the central axis 10A, a processing target liquid introduction pipe 11 for continuously supplying the processing target liquid A is disposed at one end side of the processing target liquid introduction part α, that is, the cylinder 10. The liquid introduction pipe 11 to be treated is a straight pipe inside the cylindrical portion 10, but may be an appropriately bent pipe outside the cylindrical portion 10.

As will be described later, a supply part 17 is provided at the tip of the inner liquid introduction pipe 11 of the cylinder part 10, and the supply part 17 moves straight along the central axis 10A. ) To bend the flow, and guide it outward in the radial direction of the cylinder 10.

A plurality of circular holes 15 are evenly arranged on the wall surface 14 of the liquid introduction part α to be treated by punching, and as in the separation liquid discharge part β, as the cylinder 10 rotates, Sludge or moisture (W) is discharged from the hole 15 to the outside and below the barrel 10. The diameter of the hole 15 may be about 1 mm. The punched metal with such small-diameter holes 15 has different impurities and fibers contained in the liquid to be treated (A) compared to the wedge wire twisted as a square hole is opened. Difficult to stick That is, clogging of the hole 15 is difficult to occur.

At the end of the liquid introduction portion α to be treated, a closing plate 20B having a circular opening coaxial with the central axis 10A and closing all the radial directions of the cylinder 10 except for the opening is disposed. have. The opening is of a size necessary and sufficient for inserting the liquid introduction pipe 11 to be treated into the interior of the cylinder 10, and the liquid A to be treated is transferred from the opening to the outside of the cylinder 10. It is large enough to not spill.

The support 12a is connected to the closing plate 20B, and is a cylindrical member coaxial with the central axis 10A. The inner diameter of the cylinder is a size necessary and sufficient to insert the liquid introduction pipe 11 to be treated into the interior of the cylinder 10.

The separated liquid discharge part (β) is disposed between the treatment liquid introduction part (α) and the lump-like substance discharge part (γ), and a plurality of holes 15 are evenly arranged like the treatment liquid introduction part (α). Accordingly, as the cylinder portion 10 rotates, the sludge or moisture (W) is discharged from the hole 15 to the outside and downward of the cylinder portion 10.

Further, a first discharge pipe 16 for receiving sludge or moisture W is provided below the treatment target liquid introduction part α and the separated liquid discharge part β.

A closing plate 20A is disposed at an end portion of the lump-shaped material discharge portion γ to close all the radial directions of the cylindrical portion 10. By the closing plate 20A and the above-described closing plate 20B, it is possible to avoid scattering of the liquid A supplied to the inside of the cylinder part 10 to the peripheral devices disposed outside the cylinder part 10. Therefore, contamination or corrosion of peripheral devices can be prevented.

In addition, between the closing plate 20A and the separated liquid discharge part β, in the circumferential direction of the wall surface 14 of the lump-shaped substance discharge part γ, a plurality of square (eg, rectangular) discharge ports 22 are provided. They are evenly arranged. Therefore, according to the rotation of the barrel portion 10, the lump-shaped material S is discharged from the outlet 22 to the outside and downward of the barrel portion 10. The outlet 22 has a larger opening area than the hole 15. For example, the size of the outlet 22 may be 12 cm Х 15 cm. Like the hole 15, the discharge port 22 may also be opened by punching. It is preferable that the outlet 22 has a larger dimension in the circumferential direction of the cylindrical portion 10. By increasing the circumferential dimension, the length of the drum screen device can be made compact, and a large amount of lump-shaped objects S can be discharged at once.

Further, a second discharge pipe 23 is provided below the lump-shaped substance discharging portion γ to receive the lump-shaped substance S with an opening size larger than that of the discharge port 22.

The support 12b is connected to the closing plate 20A, and is a cylindrical member coaxial with the central axis 10A.

The support 12 (supports 12a and 12b) is supported by a member (not shown) that rotatably supports them. In addition, as shown in FIG. 1, a drive means 13 such as a motor for rotating the support 12 is provided. When the drive means 13 rotates the support 12, the cylindrical portion 10 integrally connected with the support 12 also rotates.

As the drive transmission means from the drive means 13 to the support 12, a known suitable means such as a chain and a sprocket can be used.

Then, the supply unit 17 connected to the processing target liquid introduction pipe 11 will be described in detail with reference to FIGS. 2 and 3. As shown in Fig. 2, the supply unit 17 is connected to a substantially trapezoidal guide plate 19, a current transformer plate 18A connected to the upper side of the trapezoid, and a liquid introduction pipe 11 to be treated, and further 18A and the current-changing plate 18B connected to the guide plate 19, and a current-changing plate 18C facing the current-changing plate 18B and connected to the current-changing plate 18A and the guide plate 19. The upper side of the trapezoid is shorter than the bottom side and is disposed closer to the central axis 10A than the bottom side.

In the current-changing plate 18B, an opening for introducing the liquid A to be treated is formed on the guide plate 19 from the liquid introduction pipe 11 to be treated, but the liquid introduction pipe 11 to be treated has the opening. It may penetrate through and connect to the current-changing plate 18B, or the introduction pipe opening 11A, which is an end of the liquid introduction pipe 11 to be treated, may be connected to the opening.

The current-changing plates 18 (18A, 18B, 18C) are vertically connected to the guide plate 19. In addition, the height of the current-changing plate 18 is set to a height at which the liquid to be treated A cannot flow beyond the current-changing plate 18.

The current-changing plate 18A is disposed substantially parallel to the central axis 10A. The current-changing plate 18B is an angle θ1 from a direction perpendicular to the central axis 10A in a direction opposite to the flow direction (I) of the processing target liquid flowing through the processing target liquid introduction pipe 11 along the central axis 10A. ), and is connected to the right side of the substantially trapezoidal guide plate 19. The current-changing plate 18C is inclined by an angle θ2 from the direction perpendicular to the central axis 10A in the same direction as the flow direction I of the liquid to be treated, so that it is substantially trapezoidal on the left side of the guide plate 19. You are connected. The angle θ1 and the angle θ2 may be the same or different angles. Depending on the properties or flow rate of the liquid to be treated, 0°<θ1≦60° and 0°<θ2≦60° are appropriately set.

L≤4/5r의 범위로 설정된다.3 is a cross-sectional view of the supply unit 17 viewed from a cross-section taken along line III-III of FIG. 1. The guide plate 19 is arranged inclined by an angle θ3 from the vertical direction of the central axis 10A of the cylinder portion 10 and from below, in the rotational direction of the cylinder portion 10. The angle θ3 is set in the range of 0°<θ3≦60°. In addition, in FIG. 3, the length L from the central axis 10A of the supply portion 17 in the radial direction of the cylinder portion 10 is 1/2r ≤ when the radius of the cylinder portion 10 is r

It is set in the range of L≤4/5r.

In the case of using the drum screen device 100 as a fiber removal device, the liquid to be treated A can be introduced into the cylinder 10 smoothly so that the liquid A to be treated does not collide with the wall 14 and scatter. Since it is good to have it, the dimension of L may be set to be short, for example, L≒1/2r. On the other hand, in the case of using the drum screen device 100 as a sludge concentrating device, fibers are removed so that a coagulant is mixed and the treated liquid A, which has a large diameter of the sludge flock, is not destroyed or subdivided by the collision. Since it is necessary to supply the liquid to be treated (A) to the wall surface 14 more smoothly than in the case of using as a device, the dimension of L needs to be set as long as possible, and 3/4r≤L≤4/5r. It is desirable to do. At least, if L≒3/4r, it is possible to sufficiently function as a sludge concentrating device. Of course, also in the case of using the drum screen device 100 as a fiber removal device, it may be set in the range of 3/4r≦L≦4/5r, or may be set as L≒3/4r.

Here, the flow of the liquid to be treated A in the supply unit 17 will be described with reference to FIGS. 2 and 3. The liquid to be treated A flowing through the inside of the liquid to be treated introduction pipe 11 is discharged from the introduction pipe opening 11A toward the direction I. The discharged liquid A to be treated collides with the current-changing plate 18C of the supply unit 17 and is largely changed in direction from the direction I. That is, part of the discharged liquid to be treated A flows above the guide plate 19 and along the current plate 18C, and a part of the liquid to be treated A bounces back from the current plate 18C, thereby returning the guide plate ( 19) A portion of the liquid to be treated (A) that flows above and along the current plate (18B) and bounced back from the current plate (18C) cannot flow beyond the current plate (18A). It flows between the flow plate 18C and the current flow plate 18B.

In other words, the supply unit 17 is distributed so that the flow rate of the liquid to be treated A flowing from the base of the substantially trapezoidal guide plate 19 is substantially equalized at any point on the base, and the wall surface 14 The liquid to be treated (A) is discharged toward and the liquid (A) to be treated is dropped on the wall surface.

For example, in the case of discharging the treatment liquid A to the wall 14 by bending the tip of the liquid introduction pipe 11 downward by 90° without providing the supply unit 17, the introduction pipe opening ( Since the liquid A collides with the wall 14 with substantially the same area as 11A), the flow rate per hole 15 of the wall 14 where the liquid A falls is It becomes excessive, and there exists a possibility that the fiber removal or sludge concentration of the liquid to be treated (A) cannot be performed, and the sludge or moisture (W) cannot be properly discharged from the hole 15. However, since the supply unit 17 changes the flow of the liquid A to be treated with the current-changing plate 18 and disperses the liquid A to be treated on the guide plate 19, the opening of the treatment liquid introduction pipe 11 The liquid A to be treated can collide with the wall surface 14 in an area that is significantly larger than the opening 11A of the suction inlet pipe. Therefore, since the flow rate of the liquid to be treated A per one of the plurality of holes 15 arranged regularly can be reduced, and the flow rate of each of the holes 15 can be uniform, the liquid to be treated (A) It is possible to properly discharge the sludge or moisture (W) from the hole (15).

In addition, the liquid to be treated (A) flowing above the guide plate 19 and along the current-changing plate 18B, that is, the liquid to be treated (A) that has changed the flow in a direction opposite to and downward from the direction (I), It is designed to fall in the vicinity of the connection point between the closing plate 20B and the wall surface 14 in α). Therefore, since the sludge or water (W) of the liquid to be treated (A) can be discharged from the most end of the cylinder portion (10) where the hole (15) is formed, it is possible to fully utilize the effective length of the cylinder portion (10). It becomes.

In addition, in the drum screen device 100, the supports 12 (12a, 12b) for supporting the tubular portion 10 freely to rotate are disposed on both sides of the tubular portion 10, but if there is no problem in strength, the support 12 It may be provided only on one side, and the tubular portion 10 may be supported from one side.

(Modification example)

A drum screen device 101 that is a modified example of the present invention will be described with reference to FIG. 4. Here, the difference from the above-described drum screen device 100 of FIG. 1 is mainly described, and the description of the same parts is omitted.

In the drum screen device 101 of Fig. 4, instead of the support 12b of Fig. 1, a support 30 is disposed on the other end side of the cylinder 10 to freely rotate the cylinder 10 from below. . The support 30 is a rolling stand (roller member) that rotates about an axis parallel to the central axis 10A of the cylinder 10. In FIG. 4, the drive means 13 is configured to rotate the support 12a, but the drive means 13 may rotate the support 30.

Since the support 30 is installed between the closing plate 20A and the outlet 22, when the mass S is discharged from the outlet 22, the mass S contacts the support 30 There is no, and it is possible to suppress the occurrence of troubles such as corrosion or rotational disturbance of the support body 30. Further, both ends of the cylindrical portion 10 may be supported only by a plurality of supports 30.

The drum screen device 101 receives a detection signal from the flow rate sensor 41 provided in the second discharge pipe 23, the flow rate adjustment means 42 provided in the treatment liquid introduction pipe 11, and the flow rate sensor 41. It has a control device 40 that receives and controls the flow rate adjustment means 42 and the drive means 13 in accordance with the detection signal.

The flow sensor 41 detects the flow rate of the sludge or moisture discharged to the second discharge pipe 23, and transmits a detection signal corresponding to the flow rate.

The flow rate adjustment means 42 is, for example, an electric valve or a pump. The control device 40 can control the flow rate adjustment means 42 to increase or decrease the supply amount of the liquid to be treated A.

The control device 40 can increase or decrease the rotational speed (revolution per unit time) of the cylinder 10 by controlling the driving means 13 such as an electric motor.

In addition, in FIG. 4, the addition device 50 provided in the liquid introduction pipe 11 to be treated downstream of the flow rate adjustment means 42 and upstream of the cylinder 10 is shown. The addition device 50 is a device that continuously injects a coagulant G into the liquid A to be treated through the liquid introduction pipe 11 to be treated. Therefore, when using the drum screen device 101 as a fiber removing device, the adding device 50 is unnecessary. That is, the addition device 50 is installed when the drum screen device 101 is used as a sludge thickening device.

Then, the control of the drum screen device 101 by the control device 40 in FIG. 4 will be described in a case where the drum screen device 101 is used as a fiber removal device and a case where a sludge thickening device is used.

First, a case where the drum screen device 101 is used as a fiber removal device will be described. As described above, in this case, the addition device 50 of FIG. 4 is not installed.

When a worker activates the drum screen device 101 by, for example, turning on a power switch, the control device 40 controls the drive means 13 to move the cylinder 10 in a predetermined direction at a predetermined rotational speed. Simultaneously with rotation, the flow rate adjustment means 42 is controlled, and the target liquid A is flowed into the treatment target liquid introduction pipe 11 at a predetermined flow rate. Thereby, the liquid to be treated A is supplied to the inside of the cylinder part 10 from the supply part 17 arranged in the liquid introduction part α to be treated.

The liquid to be treated (A) flows from the liquid to be treated introduction part (α) to the lump-shaped material discharge part (γ), but in the process, most of the liquid to be treated (A) in the separated liquid discharge part (β) Sludge (for example, 95% or more of sludge) is discharged, and substantially only fibers contained in the liquid to be treated (A) are discharged as a lump-shaped substance S from the lump-shaped substance discharge part γ.

However, depending on the properties of the liquid to be treated (A), at the predetermined flow rate and the predetermined rotational speed, a large amount of sludge is discharged from the lump-shaped material discharge portion (γ), and the detection value of the flow sensor 41 There may be cases where it is greater than a predetermined value. In this case, the control device 40 controls the flow rate adjustment means 42 to control the flow rate adjustment means 42 to be processed because the target liquid A is supplied more than necessary or the rotation speed is too slow. The supply amount of the liquid A is reduced, or the rotational speed of the barrel 10 is increased.

At this time, the control device 40 appropriately controls the rotation speed within the range of the rotation speed at which the fibers contained in the liquid to be treated A grow in a columnar shape (roll shape) in the longitudinal direction of the cylindrical portion 10. For example, the rotational speed may be 0.1 m/s or more. The predetermined rotation speed is also within the range.

The supply unit 17 drops the liquid to be treated A toward a wall that moves upward among the rotating wall surfaces 14, and by appropriately setting the rotational speed of the cylinder 10, the liquid to be treated (A) is The included fibers can be grown in a cylindrical shape (roll shape). Further, when the liquid to be treated A is dropped toward a wall that moves downward among the rotating wall surfaces 14, the fibers contained in the liquid to be treated A cannot be grown in a roll shape.

As the cylinder portion 10 rotates, the roll-shaped fibers entangle the fibers entangled in the holes 15 and grow (enlarge). Therefore, it is possible to prevent clogging in the hole 15 of the wall 14 during operation of the drum screen device 101. Therefore, since self-cleaning (self-cleaning) of the cylinder portion 10 is performed, it is not necessary to normally perform the cleaning operation of the drum screen device 101 for a long period of time. That is, it can be said that the drum screen device 101 is maintenance free, and is an excellent device from the viewpoint of manufacturing cost and maintenance cost.

Next, a case where the drum screen device 101 is used as a sludge concentrating device will be described.

As described above, in this case, the addition device 50 of Fig. 4 is installed, and the coagulant G is injected into the liquid A to be treated.

When a worker activates the drum screen device 101 by, for example, turning on a power switch, the control device 40 controls the drive means 13 to move the cylinder 10 in a predetermined direction at a predetermined rotational speed. At the same time as rotation, the flow rate adjustment means 42 is controlled to flow the processing target liquid A into the processing target liquid introduction pipe 11 at a predetermined flow rate. Further, when the worker starts the drum screen device 101, the addition device 50 is started, and the coagulant G is mixed in the liquid A to be treated flowing through the liquid introduction pipe 11 to be treated. Thereby, from the supply unit 17 disposed in the liquid introduction unit α to be treated, the coagulated sludge in which the sludge floc has been made large in diameter by the coagulant G, that is, the liquid to be treated (A) mixed with the coagulant (G) It is supplied inside of (10).

The liquid to be treated (A) flows from the liquid to be treated introduction part (α) to the lump-shaped material discharge part (γ), but in the process, the moisture of the liquid to be treated (A) is discharged from the separation liquid discharge part (β). , The agglomerated sludge concentrated as a lump-shaped substance (S) is discharged from the lump-shaped substance discharge part (γ).

However, depending on the properties of the liquid to be treated (A), at the predetermined flow rate and the predetermined rotational speed, a large amount of moisture beyond the set amount is discharged from the lump-shaped material discharge unit (γ), and the flow sensor 41 detects it. There may be cases where the value becomes larger than the predetermined value. In this case, since the processing target liquid A is supplied more than necessary from the processing target liquid introduction pipe 11 or the rotation speed is too slow, the control device 40 controls the flow rate adjustment means 42 to avoid The supply amount of the treatment liquid A is reduced or the rotational speed of the barrel 10 is increased. In addition, when the drum screen device 101 is used as a sludge concentrating device, unlike the case where it is used as a fiber removing device, the control device 40 does not allow the liquid to be treated A to grow in a columnar shape (roll shape). It is controlled within the range of rotation speed that does not. The predetermined rotation speed is also within the range. In the case of sludge concentration, the larger the contact area of the liquid to be treated (A) with a large diameter of the sludge floc to the cylinder portion 10, the more effective treatment can be performed.

As described above, in the drum screen apparatuses 100 and 101 of the embodiments and modifications of the present invention, the liquid to be treated (A) is transferred from the most end portion of the cylinder portion 10 in which the hole 15 is formed by the supply portion 17. It can discharge sludge or moisture (W). Therefore, it becomes possible to utilize the effective length of the barrel part 10 to the maximum.

In addition, after dispersing the liquid A to be treated in the supply unit 17, the liquid A to be treated is dropped onto the wall surface 14 of the cylinder 10, so that the liquid to be treated ( By reducing the flow rate of A), the liquid to be treated (A) can be appropriately treated.

In addition, in the drum screen device 101, although the control device 40 is able to control the supply amount of the liquid to be treated A and the rotational speed of the cylinder 10, the flow rate is not provided without the control device 40 Based on the detection value obtained by the sensor 41, the worker manually operates the flow rate adjustment means 42 to change the supply amount of the liquid to be treated A, or the worker manually operates the drive means 13 You may operate and change the rotational speed of the cylinder part 10. Moreover, as the flow sensor 41, various sensors, such as an electronic type and an ultrasonic type, can be used, for example. In addition, in the drum screen device 101, an addition device 50 is provided in the middle of the liquid introduction pipe 11 to be treated, but the sludge floc is placed in a separate reaction tank (not shown) in front of the flow rate adjustment means 42. You may perform a coagulation operation to harden.

As described above, embodiments and modifications of the present invention have been described above with reference to the drawings, but the specific configuration is not limited thereto, and design changes and the like within a range not departing from the gist of the present invention are also included.

Industrial availability

The present invention relates to a drum screen device formed of punched metal. Advantageous Effects of Invention According to the present invention, the device can be miniaturized by maximizing the effective length of the drum screen, and the flow rate of the liquid to be treated falling on the drum screen can be reduced to appropriately treat the liquid to be treated.

10: Tongbu
10A: central axis
11: Treatment liquid introduction pipe
11A: inlet pipe opening
12a, 12b: support
13: drive means
14: wall panel
15: hole
16: first discharge pipe
17: supply
18A, 18B, 18C: current transformer
19: information board
20A: closing plate (second closing plate)
20B: closing plate (first closing plate)
22: outlet
23: second discharge pipe
30: support (roller member (roller))
40: control device
41: flow sensor
42: flow adjustment means
50: adding device
100: punching metal drum screen device
101: punching metal drum screen device
A: Liquid to be treated
G: flocculant
S: lump shape
W: sludge or moisture

Claims (4)

The central axis is disposed in a substantially horizontal direction and the wall surface is a cylindrical cylindrical portion formed of punched metal,
A first closing plate that closes one end side of the barrel except in the vicinity of the central axis,
A treatment target liquid introduction pipe disposed on the central axis and supplying a treatment target liquid through the first closing plate;
A supply unit connected to the liquid to be treated introduction pipe to receive the liquid to be treated,
A second closing plate for closing the other end side of the tube portion,
A support for rotatably supporting the cylindrical portion around the central axis,
It has a drive means for rotating the barrel,
A plurality of holes are formed in the wall surface except in the vicinity of the second closing plate,
A plurality of lump-shaped discharge ports larger than the hole are formed on the wall surface in the vicinity of the second closing plate,
The supply unit includes a substantially trapezoidal guide plate and a current-changing plate connected to a side excluding the substantially trapezoidal bottom side, and changes the flow of the liquid to be treated to the outer side in the radial direction of the cylinder, and the processing target A punching metal drum screen device, characterized in that liquid is dispersed on the guide plate, and the dispersed liquid to be treated is dropped from the base onto the wall surface including at least the vicinity of the first closing plate. The method of claim 1,
The liquid to be treated is sludge containing fibers,
The supply unit is characterized in that the liquid to be treated falls on the wall surface moving upward by the rotation, and the driving means rotates the cylinder at a rotational speed that grows the fibers in a roll shape inside the cylinder. A punching metal drum screen device. The method of claim 1,
The liquid to be treated is sludge mixed with a coagulant,
The driving means rotates the cylinder at a rotational speed that does not grow the liquid to be treated in a roll shape inside the cylinder. The method according to any one of claims 1 to 3,
A flow sensor installed in a discharge pipe leading to the lump-shaped substance discharge port and detecting a flow rate of sludge or moisture of the liquid to be treated discharged through the lump-shaped substance discharge port;
Flow rate adjustment means installed in the liquid to be treated introduction pipe,
When the detected value of the flow rate sensor is greater than a predetermined value, a control device for controlling the flow rate adjusting means to reduce the supply amount of the liquid to be treated, or controlling the driving means to increase the rotational speed of the cylinder portion
Punching metal drum screen device, characterized in that it further has.

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