CN112105433A - Punching metal plate drum screen device - Google Patents
Punching metal plate drum screen device Download PDFInfo
- Publication number
- CN112105433A CN112105433A CN201980025833.4A CN201980025833A CN112105433A CN 112105433 A CN112105433 A CN 112105433A CN 201980025833 A CN201980025833 A CN 201980025833A CN 112105433 A CN112105433 A CN 112105433A
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- liquid
- treated
- drum screen
- plate
- body portion
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D33/00—Filters with filtering elements which move during the filtering operation
- B01D33/06—Filters with filtering elements which move during the filtering operation with rotary cylindrical filtering surfaces, e.g. hollow drums
- B01D33/067—Construction of the filtering drums, e.g. mounting or sealing arrangements
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
- C02F11/126—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using drum filters
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D24/00—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof
- B01D24/38—Feed or discharge devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D33/00—Filters with filtering elements which move during the filtering operation
- B01D33/06—Filters with filtering elements which move during the filtering operation with rotary cylindrical filtering surfaces, e.g. hollow drums
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D33/00—Filters with filtering elements which move during the filtering operation
- B01D33/70—Filters with filtering elements which move during the filtering operation having feed or discharge devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D33/00—Filters with filtering elements which move during the filtering operation
- B01D33/80—Accessories
- B01D33/801—Driving means, shaft packing systems or the like
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D33/00—Filters with filtering elements which move during the filtering operation
- B01D33/80—Accessories
- B01D33/804—Accessories integrally combined with devices for controlling the filtration
- B01D33/806—Accessories integrally combined with devices for controlling the filtration by flow measuring
Abstract
A perforated sheet metal drum screen apparatus (100) having: a cylindrical body section (10) having a center axis (10A) arranged substantially in the horizontal direction and a wall surface formed of a punched metal plate; a first blocking plate (20B) that blocks one side of the body section (10); a treatment target liquid introduction pipe (11) for supplying a treatment target liquid through the first blocking plate (20B); a supply unit (17) connected to the treatment target liquid introduction pipe (11) and receiving the treatment target liquid; a second blocking plate (20A) blocking the other side of the trunk (10); support bodies (12a, 12b) that rotatably support the body section (10) about the central axis (10A); and a drive unit (13) that rotates the body (10). The supply unit (17) changes the flow of the liquid to be treated radially outward of the body unit and disperses the liquid to be treated so that the liquid to be treated falls toward a wall surface including at least the vicinity of the first blocking plate (20B).
Description
Technical Field
The present invention relates to a drum screening device formed from a punched metal sheet. The present application claims priority to japanese patent application No. 2018-100938 filed on 25.5.2018, and the contents of which are incorporated herein by reference.
Background
Organic wastewater such as feces and sludge in a septic tank is treated in a sludge regeneration facility. In a sludge regeneration treatment facility, in order to improve the efficiency of treatment of organic wastewater, treatment for separating fibers from organic wastewater and treatment for sludge concentration are performed.
For example, in the conventional techniques described in patent documents 1 and 2, fibers contained in sludge are separated by a fiber removing device provided with a drum screen formed of a wedge wire or a punched metal plate.
On the other hand, in the conventional techniques described in patent documents 3 and 4, sludge concentration is performed by a sludge concentration device including a drum screen formed of a wedge wire or a punched metal plate.
Documents of the prior art
Patent document
Patent document 1: japanese laid-open patent publication No. 10-192615
Patent document 2: korean patent No. 10-0904283
Patent document 3: japanese patent laid-open publication No. 2007-330920
Patent document 4: japanese patent laid-open publication No. 2002-177712
Disclosure of Invention
Problems to be solved by the invention
Conventionally, when a liquid to be treated is supplied to a drum screen having a large number of through holes formed therein, the liquid to be treated is supplied to the inside while avoiding the end of the drum screen in order to avoid the liquid to be treated from leaking to the outside of the drum screen and contaminating other devices disposed outside the drum screen, and therefore the effective length of the drum screen cannot be used sufficiently, and there is a fear that the drum screen becomes large. Further, since the liquid to be treated is concentrated and dropped at one portion of the drum screen in substantially the same size as the opening of the pipe for supplying the liquid to be treated, the flow rate of the liquid to be treated per through hole of the drum screen becomes excessive, and there is a possibility that the liquid to be treated cannot be appropriately treated.
The present invention has been made in view of the above circumstances, and provides a perforated metal plate drum screen device which can minimize the size of the device by effectively utilizing the effective length of a drum screen to the maximum extent, and can appropriately treat a liquid to be treated by reducing the flow rate of the liquid to be treated falling down to the drum screen.
Technical scheme
The punched metal plate drum screen device of the present invention is characterized by comprising: a cylindrical body portion having a central axis arranged in a substantially horizontal direction and a wall surface formed of a punched metal plate;
a first blocking plate blocking one side of the body portion except for the vicinity of the center axis; a treatment target liquid introduction pipe disposed on the central shaft and configured to supply a treatment target liquid through the first blocking plate; a supply unit connected to the treatment target liquid introduction pipe and receiving the treatment target liquid; a second blocking plate blocking the other side of the trunk; a support body that supports the body portion rotatably about the center axis; and a driving unit that rotates the body portion, a plurality of holes being formed in the wall surface except for a vicinity of the second clogging plate, and a plurality of block discharge ports larger than the holes being formed in the wall surface in the vicinity of the second clogging plate, the supply unit including: a guide plate having a substantially trapezoidal shape; and a deflector connected to a side other than a bottom side of the substantially trapezoidal shape, the deflector changing a flow of the liquid to be treated radially outward of the body portion, and dispersing the liquid to be treated on the guide plate, so that the dispersed liquid to be treated falls from the bottom side toward the wall surface including at least a vicinity of the first clogging plate.
According to this configuration, the liquid to be treated can be treated from the end of the body, and therefore the perforated metal plate drum screen device can be downsized. Further, since the liquid to be treated is dispersed by the deflector and the guide plate of the supply unit and then falls toward the wall surface of the body, the contact area between the liquid to be treated and the wall surface of the body increases, and the flow rate of the liquid to be treated with respect to each hole can be reduced, thereby appropriately treating the liquid to be treated.
In the above-described perforated metal plate drum screen device, the liquid to be treated may be sludge containing fibers, the supply unit may drop the liquid to be treated toward the wall surface of the body section that moves upward due to the rotation, and the drive unit may rotate the body section at a rotation speed at which the fibers grow in a roll shape inside the body section. According to this configuration, since the punched metal plate drum screen device is self-cleaning, it is not necessary to periodically perform cleaning work for removing clogging of the drum screen, and further, since it is not necessary to separately provide a cleaning device such as a brush, it is possible to provide a punched metal plate drum screen device excellent in terms of manufacturing cost and maintenance cost.
In the above-described perforated-metal-plate drum screen device, the liquid to be treated may be sludge in which a flocculant is mixed, and the driving unit may be configured to rotate the body at a rotation speed at which the liquid to be treated does not grow in a roll shape inside the body.
According to this configuration, the contact area between the liquid to be treated and the wall surface of the body portion can be increased, and sludge concentration can be performed efficiently.
Further, in the above described perforated-metal-plate screening apparatus, the apparatus may be configured to include: a flow rate sensor for detecting a water flow rate of the liquid to be treated in a discharge pipe communicating with the block discharge port; and a flow rate adjusting unit provided in the treated liquid introduction pipe, wherein the punched metal plate drum screen device further comprises: and a control device for controlling the flow rate adjusting unit to reduce the supply amount of the liquid to be treated or controlling the driving unit to increase the rotation speed of the trunk unit when the detection value of the flow rate sensor is larger than a predetermined value.
According to this configuration, when the liquid to be treated is supplied more than necessary or the rotation speed of the trunk part is too slow, the controller automatically adjusts the supply amount of the liquid to be treated to the optimum amount or the optimum rotation speed of the trunk part, and therefore the liquid to be treated can be appropriately treated in applications such as fiber removal and sludge concentration.
Effects of the invention
According to the present invention, it is possible to provide a perforated metal plate drum screen device which can minimize the size of the device by effectively utilizing the effective length of the drum screen to the maximum extent, and can appropriately treat the liquid to be treated by moderating the flow rate of the liquid to be treated falling down to the drum screen.
Drawings
Fig. 1 is a schematic configuration diagram showing a punched metal plate drum screen device of the present invention.
FIG. 2 is a perspective view showing a supply unit connected to the distal end of a treatment-target liquid introduction tube.
FIG. 3 is a sectional view of the supply part as seen from the section taken along line III-III in FIG. 1.
Fig. 4 is a schematic configuration diagram of a punched metal plate drum screen device showing a modification.
Detailed Description
A perforated-metal-plate drum screen apparatus 100 (hereinafter referred to as a drum screen apparatus 100) according to an embodiment of the present invention will be described with reference to fig. 1 to 3. It is noted that the drum screen device 100 may be used as a fiber removing device or a sludge thickening device.
Fig. 1 is a schematic configuration diagram showing a drum screen device 100 according to the present invention. The drum screen device 100 includes: a cylindrical body portion 10 having plugging plates 20A and 20B at both ends; a straight pipe-shaped treatment liquid introduction pipe 11 for introducing the treatment liquid a into the body portion 10; a supply unit 17 connected to the distal end of the treatment liquid introduction tube 11 and changing the flow of the treatment liquid a; a support body 12(12a and 12b) rotatably supporting the body portion 10; and a driving unit 13 for rotating the body 10 in one direction.
The body 10 is a cylindrical body whose wall surface 14 is formed of a punched metal plate. The central axis 10A (virtual axis) of the body portion 10 is arranged in a substantially horizontal direction. As shown in fig. 1, the trunk portion 10 is divided into three portions: a treated liquid introduction unit (alpha) for introducing a treated liquid (A); a separation liquid discharge section β for removing a part of water (sludge or water W) from the liquid a to be treated; and a cake discharge section γ that discharges the cake S from which the sludge or moisture is removed from the liquid a to be treated in the separation liquid discharge section β. That is, the entire length of the body portion 10 is the sum of the lengths of the treatment liquid introduction portion α, the separation liquid discharge portion β, and the cake discharge portion γ along the central axis 10A.
When the drum screen device 100 is used as a fiber removing device, the liquid a to be treated is sludge containing fibers, and the cake S is fibers. In addition, in the case where the drum screen device 100 is used as a sludge thickening device, the liquid to be treated a is sludge into which a coagulant is injected, and the lumps S become thickened sludge.
As the body portion 10 rotates, the liquid a to be treated introduced into the liquid introduction portion α advances while gradually removing sludge or water W from the liquid introduction portion α toward the cake discharge portion γ. A treatment target liquid introduction pipe 11 for continuously supplying a treatment target liquid a to the treatment target liquid introduction portion α, i.e., the side of the body portion 10, is disposed on the central axis 10A. The treatment liquid introduction pipe 11 is a linear pipe inside the body portion 10, but may be a pipe that is appropriately bent outside the body portion 10.
As described later, the supply portion 17 is provided at the distal end of the treatment target liquid introduction pipe 11 inside the body portion 10, and the supply portion 17 bends the flow of the treatment target liquid a that is straight along the central axis 10A and guides the flow to the outside in the radial direction of the body portion 10.
A large number of circular holes 15 are uniformly formed by punching in the wall surface 14 of the treatment target liquid introduction portion α, and sludge or water W is discharged from the holes 15 to the outside and below the body portion 10 as the body portion 10 rotates, similarly to the separation liquid discharge portion β. The diameter of the hole 15 may be set to about 1 mm. The punched metal plate having the small-diameter holes 15 is less likely to have foreign substances and fibers entangled therein than a wedge wire woven so as to have square holes. That is, clogging of the hole 15 is less likely to occur.
A circular opening coaxial with the central axis 10A is provided at an end of the treatment solution introduction portion α, and a blocking plate 20B that blocks all radial directions of the body portion 10 except for the opening is disposed. The opening is a size necessary and sufficient for inserting the treatment liquid introduction tube 11 into the body portion 10, and is a size enough to prevent the treatment liquid a from flowing out of the body portion 10 through the opening.
The support body 12a is a cylindrical member connected to the blocking plate 20B and coaxial with the central axis 10A. The inner diameter of the cylinder is a necessary and sufficient size for inserting the treatment liquid introduction tube 11 into the body 10.
The separation liquid discharge portion β is disposed between the treatment liquid introduction portion α and the cake discharge portion γ, and a plurality of holes 15 are equally disposed similarly to the treatment liquid introduction portion α. Therefore, as the body portion 10 rotates, the sludge or the water W is discharged from the hole 15 to the outside and below the body portion 10.
A first discharge pipe 16 for receiving sludge or moisture W is provided below the treated liquid introduction portion α and the separated liquid discharge portion β.
A blocking plate 20A that blocks the entire radial direction of the body portion 10 is disposed at an end portion of the block discharging portion γ. The clogging plate 20A and the clogging plate 20B prevent the liquid a to be treated supplied to the inside of the body portion 10 from scattering to peripheral devices disposed outside the body portion 10, and therefore prevent contamination and corrosion of the peripheral devices.
Further, between the clogging plate 20A and the separated liquid discharging portion β, a plurality of rectangular (for example, oblong) discharge ports 22 are arranged uniformly in the circumferential direction of the wall surface 14 of the cake discharging portion γ. Therefore, as the body portion 10 rotates, the blocks S are discharged from the discharge port 22 to the outside and below the body portion 10. The discharge port 22 has a larger opening area than the hole 15. For example, the size of the discharge port 22 may be set to 12cm × 15 cm. Like the hole 15, the discharge port 22 may be punched. It is preferable to set the circumferential dimension of the trunk portion 10 of the discharge port 22 larger. By making the circumferential dimension larger, the length of the drum screen device can be made compact, and a large amount of the lump S can be discharged at a time.
A second discharge pipe 23 having an opening size larger than the size of the discharge port 22 and receiving the lump S is provided below the lump discharging portion γ.
The support body 12b is a columnar member connected to the clogging plate 20A and coaxial with the central axis 10A.
The support bodies 12 ( support bodies 12a and 12b) are supported by a member (not shown) that supports them to be rotatable. As shown in fig. 1, the punched metal plate drum screen device 100 is provided with a driving unit 13 such as a motor for rotating the support body 12. The drive unit 13 rotates the support body 12, and thereby the body portion 10 integrally connected to the support body 12 also rotates.
The drive transmission unit from the drive unit 13 to the support body 12 may use a known appropriate unit such as a chain and a sprocket.
Next, the supply unit 17 connected to the treatment target liquid introduction pipe 11 will be described in detail with reference to fig. 2 and 3. As shown in fig. 2, the supply unit 17 includes: a guide plate 19 having a substantially trapezoidal shape; a variable flow plate 18A connected to the upper side of the trapezoid; a variable flow plate 18B connected to the treatment liquid introduction pipe 11, and connected to the variable flow plate 18A and the guide plate 19; and a variable flow plate 18C that faces the variable flow plate 18B and is connected to the variable flow plate 18A and the guide plate 19. The upper side of the trapezoid is shorter than the lower side, and is disposed closer to the central axis 10A than the lower side.
The deflector 18B has an opening for introducing the treatment target liquid a from the treatment target liquid introduction pipe 11 to the guide plate 19, and the treatment target liquid introduction pipe 11 may be connected to the deflector 18B by passing through the opening, or the introduction pipe opening 11A as an end of the treatment target liquid introduction pipe 11 may be connected to the opening.
The variable flow plates 18(18A, 18B, 18C) are connected perpendicularly to the guide plate 19. The height of the variable flow plate 18 is set to a height at which the treatment liquid a cannot flow across the variable flow plate 18.
The deflector 18A is disposed substantially parallel to the central axis 10A. The deflector 18B is connected to the right side of the substantially trapezoidal guide plate 19 so as to be inclined at an angle θ 1 from the direction perpendicular to the central axis 10A in the direction opposite to the flow direction (i) of the treatment liquid flowing through the treatment liquid introduction pipe 11 along the central axis 10A. The deflector 18C is connected to the left side of the substantially trapezoidal guide plate 19 so as to be inclined at an angle θ 2 from a direction perpendicular to the central axis 10A in the same direction as the flow direction (i) of the treatment target liquid. The angle θ 1 and the angle θ 2 may be the same angle or different angles. The flow rate and properties of the liquid to be treated may be appropriately set to 0 ° < θ 1 ° or more and 60 ° or less, and 0 ° < θ 2 ° or more and 60 ° or less.
Fig. 3 is a sectional view of supply unit 17 as viewed from a section taken along line III-III in fig. 1. The guide plate 19 is disposed at an angle θ 3 inclined from the vertical direction and the lower side of the central axis 10A of the body 10 in the rotation direction of the body 10. The angle theta 3 is set in a range of 0 DEG < theta 3 DEG.ltoreq.60 deg. In fig. 3, when the radius of the body portion 10 is r, the length L of the supply portion 17 in the radial direction of the body portion 10 from the central axis 10A is set in the range of 1/2r ≦ L ≦ 4/5 r.
When the drum screen device 100 is used as a fiber removing device, the size L may be set short, for example, so long as the liquid a can be slowly introduced into the body portion 10 to such an extent that the liquid a collides with the wall surface 14 and does not scatter
On the other hand, when the drum screen device 100 is used as a sludge thickening device, the liquid a to be treated needs to be supplied to the wall surface 14 more slowly than when used as a fiber removing device in order to prevent the liquid a to be treated, into which the flocculant is mixed and the sludge flocs have been increased in diameter, from being broken and fragmented during the collision, and therefore the size of L needs to be set as long as possible, and is preferably 3/4r ≦ L4/5 r. If at least is
The sludge thickener can function sufficiently as a sludge thickener. Of course, when the drum screen device 100 is used as the fiber removing device, L may be set to a range of 3/4 r.ltoreq.L.ltoreq. 4/5r, or may be set to a range of L.ltoreq.L. 4/5r
Here, the flow of the liquid a to be treated in the supply unit 17 will be described with reference to fig. 2 and 3. The treatment liquid a flowing inside the treatment liquid introduction pipe 11 is discharged in the direction (i) from the introduction pipe opening 11A. The discharged liquid a to be treated collides with the flow changing plate 18C of the supply unit 17, and the direction is largely changed from the direction (i). That is, a part of the discharged treatment liquid a flows along the guide plate 19 and the flow change plate 18C, a part of the treatment liquid a rebounds at the flow change plate 18C and flows along the guide plate 19 and the flow change plate 18B, and a part of the treatment liquid a rebounded at the flow change plate 18C flows on the guide plate 19 and between the flow change plate 18C and the flow change plate 18B in a state where it cannot flow over the flow change plate 18A.
In other words, the supply unit 17 disperses the flow rate of the liquid a to be treated flowing down from the bottom side of the substantially trapezoidal guide plate 19 so as to be substantially uniform at any portion of the bottom side, discharges the liquid a to be treated toward the wall surface 14, and drops the liquid a to be treated onto the wall surface.
For example, when the supply portion 17 is not provided and the liquid a to be treated is discharged to the wall surface 14 by bending the distal end of the liquid introduction pipe 11 downward by 90 °, the liquid a to be treated collides with the wall surface 14 in substantially the same area as the introduction pipe opening portion 11A, and therefore the flow rate per hole 15 in the wall surface 14 where the liquid a to be treated falls becomes excessive, fiber removal or sludge concentration of the liquid a to be treated cannot be performed, and there is a possibility that the sludge or the water W cannot be appropriately discharged from the hole 15. However, since the supply unit 17 changes the flow of the liquid a to be treated by the deflector 18 and disperses the liquid a to be treated on the guide plate 19, the liquid a to be treated can be caused to collide with the wall surface 14 over an area wider than the inlet pipe opening 11A, which is the opening of the liquid inlet pipe 11. Therefore, the flow rate of the liquid a to be treated per one of the plurality of holes 15 arranged regularly can be reduced, and the flow rate per one of the holes 15 can be made uniform, so that the sludge or the moisture W of the liquid a to be treated can be appropriately discharged from the holes 15.
Further, the liquid a to be treated flowing along the guide plate 19 and the deflector plate 18B, that is, the liquid a to be treated whose flow is changed to the direction (i) opposite to and below is designed to fall in the vicinity of the connection portion of the clogging plate 20B and the wall surface 14 in the liquid introduction portion α to be treated. Therefore, the sludge or the water W in the liquid to be treated a can be discharged from the end of the body portion 10 where the hole 15 is formed, and therefore the effective length of the body portion 10 can be sufficiently utilized.
In the drum screen device 100, the support bodies 12(12a, 12b) that rotatably support the body portion 10 are disposed on both sides of the body portion 10, but if there is no problem in strength, the support bodies 12 may be provided only on one side to support the body portion 10 by a cantilever.
(modified example)
A drum screen device 101 as a modified example of the present invention will be described with reference to fig. 4. Here, differences from the drum screen device 100 of fig. 1 described above will be mainly described, and descriptions of the same parts will be omitted.
In the drum screen device 101 of fig. 4, a support body 30 for rotatably supporting the body portion 10 from below is disposed on the other side of the body portion 10, instead of the support body 12b of fig. 1. The support body 30 is a roller (roller member) that rotates about an axis parallel to the central axis 10A of the body portion 10. In fig. 4, the driving unit 13 is configured to rotate the support body 12a, but the driving unit 13 may rotate the support body 30.
Since the support body 30 is provided between the blocking plate 20A and the discharge port 22, when the block S is discharged from the discharge port 22, the block S does not contact the support body 30, and the occurrence of problems such as corrosion and rotation failure of the support body 30 can be suppressed. The drum screen device 101 may be configured to support both ends of the body portion 10 only by the plurality of support bodies 30.
The drum screen device 101 includes: a flow sensor 41 provided in the second discharge pipe 23; a flow rate adjusting unit 42 provided in the treatment liquid introduction pipe 11; and a control device 40 for receiving the detection signal of the flow sensor 41 and controlling the flow rate adjusting unit 42 and the driving unit 13 according to the detection signal.
The flow rate sensor 41 detects the flow rate of the sludge and the moisture discharged from the second discharge pipe 23, and emits a detection signal corresponding to the flow rate.
The flow rate adjusting unit 42 is, for example, an electric valve or a pump. The control device 40 can control the flow rate adjusting unit 42 to increase or decrease the supply amount of the treatment liquid a.
The control device 40 can control the driving unit 13 such as an electric motor to increase or decrease the rotation speed (the rotation speed per unit time) of the body portion 10.
Fig. 4 shows an addition device 50 provided in the treatment liquid introduction pipe 11 downstream of the flow rate adjustment unit 42 and upstream of the body portion 10. The addition device 50 is a device for continuously injecting the coagulant G into the treatment target liquid a through the treatment target liquid introduction pipe 11. Therefore, in the case where the drum screen device 101 is used as the fiber removing device, the adding device 50 is not required. That is, the adding device 50 is provided in the case where the drum screen device 101 is used as the sludge thickening device.
Next, the control of the drum screen device 101 by the control device 40 of fig. 4 will be described in a case where the drum screen device 101 is used as a fiber removing device and a case where the drum screen device is used as a sludge thickening device.
First, a case where the drum screen device 101 is used as a fiber removing device will be described. As described above, in this case, the adding device 50 of fig. 4 is not provided.
When the operator turns on the drum screen device 101 by, for example, turning on a power switch, the control device 40 controls the driving unit 13 to rotate the body 10 in a predetermined direction at a predetermined rotation speed, and controls the flow rate adjusting unit 42 to flow the liquid a into the liquid introduction pipe 11 at a predetermined flow rate. Thereby, the liquid a to be treated is supplied from the supply portion 17 disposed in the liquid introduction portion α into the body portion 10.
The liquid a to be treated flows from the liquid introduction portion α to the cake discharge portion γ, but in this process, most of the sludge (for example, 95% or more of the sludge) of the liquid a to be treated is discharged from the separation liquid discharge portion β, and substantially only the fibers contained in the liquid a to be treated are discharged from the cake discharge portion γ as the cake S.
However, depending on the properties of the liquid a to be treated, a large amount of sludge may be discharged from the cake discharge portion γ in a state of the predetermined flow rate and the predetermined rotation speed, and the detection value of the flow rate sensor 41 may be larger than a predetermined value. In this case, since the treatment liquid a is supplied from the treatment liquid introduction pipe 11 at a rate not less than necessary or the rotation speed is too slow, the control device 40 controls the flow rate adjusting unit 42 to decrease the supply amount of the treatment liquid a or increase the rotation speed of the body portion 10.
At this time, the controller 40 appropriately controls the rotation speed within the range of the rotation speed at which the fibers contained in the treatment target liquid a grow in a cylindrical shape (in a roll shape) in the longitudinal direction of the barrel 10. For example, the rotational speed is preferably 0.1m/s or more. The predetermined rotational speed is also within this range.
The fibers contained in the liquid a to be treated can be grown in a cylindrical shape (in a roll shape) by the supply unit 17 dropping the liquid a to be treated toward the wall surface moving upward out of the rotating wall surfaces 14 and setting the rotation speed of the barrel unit 10 appropriately. When the liquid a to be treated is dropped toward the wall surface moving downward in the rotating wall surface 14, the fibers contained in the liquid a to be treated cannot be grown in a roll shape.
As the trunk 10 rotates, the fiber wound in the roll shape entangles with the fiber wound around the hole 15 and grows (becomes huge). Therefore, the holes 15 of the wall surface 14 can be prevented from being clogged during the operation of the drum screen device 101. This completes self-cleaning (self-cleaning) of the body portion 10, and therefore, there is no need to periodically perform cleaning work of the drum screen device 101 for a long period of time. That is, the drum screen device 101 is maintenance-free, and is an excellent device in terms of manufacturing cost and maintenance cost.
Next, a case where the drum screen device 101 is used as a sludge thickening device will be described.
As described above, in this case, the addition device 50 shown in fig. 4 is provided to inject the coagulant G into the treatment target liquid a.
When the operator turns on the drum screen device 101 by, for example, turning on a power switch, the control device 40 controls the driving unit 13 to rotate the body 10 in a predetermined direction at a predetermined rotation speed, and controls the flow rate adjusting unit 42 to flow the liquid a into the liquid introduction pipe 11 at a predetermined flow rate. When the operator activates the drum screen device 101, the addition device 50 is activated to mix the coagulant G into the treatment target liquid a flowing through the treatment target liquid introduction pipe 11. Thus, the flocculated sludge having the sludge flocs with a larger diameter by the flocculant G, that is, the liquid to be treated a mixed with the flocculant G is supplied from the supply section 17 disposed in the liquid to be treated introduction section α into the body section 10.
The liquid a to be treated flows from the liquid introduction portion α toward the cake discharge portion γ, but in this process, the moisture of the liquid a to be treated is discharged in the separation liquid discharge portion β, and the concentrated coagulated sludge is discharged as the cake S from the cake discharge portion γ.
However, depending on the properties of the liquid a to be treated, a large amount of water equal to or larger than a predetermined value may be discharged from the cake discharge portion γ at the predetermined flow rate and the predetermined rotation speed, and the detection value of the flow rate sensor 41 may be larger than the predetermined value. In this case, since the treatment liquid a is supplied from the treatment liquid introduction pipe 11 at a rate not less than necessary or the rotation speed is too slow, the control device 40 controls the flow rate adjusting unit 42 to decrease the supply amount of the treatment liquid a or increase the rotation speed of the body portion 10. In the case where the drum screen device 101 is used as a sludge thickening device, the control device 40 controls the rotation speed within a range in which the liquid a to be treated does not grow into a cylindrical shape (a roll shape), unlike the case where the drum screen device is used as a fiber removing device. The predetermined rotational speed is also within this range. In the case of sludge thickening, the liquid to be treated a in which the sludge flocs have a larger diameter can be effectively treated with a larger contact area with the body 10.
As described above, the drum screen devices 100 and 101 according to the embodiments and modifications of the present invention can discharge the sludge or the water W of the liquid a to be treated from the outermost end portion of the body 10 having the holes 15 formed therein by the supply portion 17. Therefore, the effective length of the body portion 10 can be effectively used to the maximum extent.
Further, since the liquid a is dispersed by the supply unit 17 and then dropped toward the wall surface 14 of the body portion 10, the flow rate of the liquid a to the holes 15 can be reduced, and the liquid a can be appropriately treated.
In the drum screen device 101, the control device 40 is provided to control the supply amount of the liquid a to be treated and the rotation speed of the body portion 10, but the control device 40 may not be provided, and the operator may change the supply amount of the liquid a to be treated by manually operating the flow rate adjusting unit 42 or the rotation speed of the body portion 10 by manually operating the driving unit 13 based on the detection value obtained by the flow rate sensor 41. As the flow sensor 41, various sensors such as an electromagnetic sensor and an ultrasonic sensor can be used. In addition, in the drum sieve device 101, the addition device 50 is provided in the flow path of the treatment liquid introduction pipe 11, but the flocculation operation for increasing the diameter of the sludge flocs may be performed by an extra reaction tank (not shown) at the front stage of the flow rate adjusting means 42.
While the embodiments and modifications of the present invention have been described in detail with reference to the drawings, the specific configurations are not limited thereto, and design changes and the like are also included without departing from the scope of the present invention.
Industrial applicability of the invention
The present invention relates to a drum screen device formed of punched metal sheets. According to the present invention, the effective length of the drum screen can be utilized to the maximum extent to miniaturize the apparatus, and the flow rate of the liquid to be treated falling down to the drum screen can be moderated to appropriately treat the liquid to be treated.
Description of the symbols
10 trunk parts
10A center shaft
11 introduction pipe for liquid to be treated
11A introduction tube opening
12a, 12b support
13 drive unit
14 wall surface
15 holes
16 first exhaust pipe
17 supply part
18A, 18B, 18C deflector
19 guide plate
20A closure plate (second closure plate)
20B blocking board (first blocking board)
22 discharge port
23 second discharge pipe
30 support (roller component (roller))
40 control device
41 flow sensor
42 flow regulating unit
50 add device
100 punching metal plate drum screen device
101 punching metal plate drum screen device
A liquid to be treated
G agglomerant
S-shaped block
W sludge or moisture
Claims (4)
1. A perforated sheet metal drum screen apparatus, comprising:
a cylindrical body portion having a central axis arranged in a substantially horizontal direction and a wall surface formed of a punched metal plate;
a first blocking plate blocking one side of the body portion except for the vicinity of the center axis;
a treatment target liquid introduction pipe disposed on the central shaft and configured to supply a treatment target liquid through the first blocking plate;
a supply unit connected to the treatment target liquid introduction pipe and receiving the treatment target liquid;
a second blocking plate blocking the other side of the trunk;
a support body that supports the body portion rotatably about the center axis; and a driving unit for rotating the trunk part,
a plurality of holes are formed in the wall surface except for the vicinity of the second clogging plate,
a plurality of block discharge ports larger than the hole are formed in the wall surface in the vicinity of the second clogging plate,
the supply unit includes: a guide plate having a substantially trapezoidal shape; and a deflector connected to a side other than a bottom side of the substantially trapezoidal shape, the deflector changing a flow of the liquid to be treated radially outward of the body portion, and dispersing the liquid to be treated on the guide plate, so that the dispersed liquid to be treated falls from the bottom side toward the wall surface including at least a vicinity of the first clogging plate.
2. A punched sheet metal screening device as claimed in claim 1,
the liquid to be treated is a fiber-containing sludge,
the supply unit drops the liquid to be treated toward the wall surface moved upward by the rotation, and the drive unit rotates the body at a rotation speed at which the fibers are grown in a roll shape in the body.
3. The perforated sheet metal screening apparatus of claim 1,
the liquid to be treated is sludge mixed with a coagulant,
the drive unit rotates the body at a rotation speed at which the liquid to be treated does not grow in a roll shape inside the body.
4. A perforated metal sheet drum screen apparatus according to any one of claims 1-3, characterized in that the perforated metal sheet drum screen apparatus further has:
a flow rate sensor provided in a discharge pipe communicating with the block discharge port and detecting a flow rate of sludge or water of the liquid to be treated discharged through the block discharge port;
a flow rate adjusting unit provided in the treatment target liquid introduction pipe; and
and a control device that controls the flow rate adjustment unit to decrease the supply amount of the liquid to be treated or controls the drive unit to increase the rotation speed of the body portion when a detection value of the flow rate sensor is larger than a predetermined value.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2018-100938 | 2018-05-25 | ||
| JP2018100938A JP6384015B1 (en) | 2018-05-25 | 2018-05-25 | Punching metal drum screen device |
| PCT/JP2019/020467 WO2019225700A1 (en) | 2018-05-25 | 2019-05-23 | Punched metal drum screening device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112105433A true CN112105433A (en) | 2020-12-18 |
| CN112105433B CN112105433B (en) | 2022-04-08 |
Family
ID=63444171
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201980025833.4A Active CN112105433B (en) | 2018-05-25 | 2019-05-23 | Punching metal plate drum screen device |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JP6384015B1 (en) |
| KR (1) | KR102534339B1 (en) |
| CN (1) | CN112105433B (en) |
| SG (1) | SG11202010219XA (en) |
| WO (1) | WO2019225700A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116143368A (en) * | 2021-11-19 | 2023-05-23 | 三菱重工环境·化学工程株式会社 | Screen device |
| CN116747593A (en) * | 2023-08-16 | 2023-09-15 | 兴合环保科技(山东)有限公司 | Sewage purification device |
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| JPH06149073A (en) * | 1992-10-30 | 1994-05-27 | Ricoh Co Ltd | Wet type developing device |
| JPH07213828A (en) * | 1994-02-10 | 1995-08-15 | Tamaki Sekkei:Kk | Gravity filtration type rotary drum screen |
| JP2002177712A (en) * | 2000-12-15 | 2002-06-25 | Ebara Jitsugyo Co Ltd | Rotary drum screen for solid/liquid separation, and sludge concentration device using the same |
| JP2007330920A (en) * | 2006-06-16 | 2007-12-27 | Hiroshi Yamashita | Drum screen and concentrator equipped with same |
| TW201102354A (en) * | 2009-07-03 | 2011-01-16 | Amukon Kk | Sludge flocculating apparatus and sludge treatment apparatus having the same |
| WO2013166822A1 (en) * | 2012-05-07 | 2013-11-14 | 西安交通大学 | Two-sectional drum screen for municipal solid waste |
| US20180021816A1 (en) * | 2015-01-29 | 2018-01-25 | Oijense Bovendijk B.V. | Screening device and method for separating dry granular material |
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|---|---|---|---|---|
| SE434125B (en) * | 1982-01-18 | 1984-07-09 | Roto Sieve Ab | DEVICE FOR SUPPLYING A SLIDE OR PARTICULAR LIQUID FLUID TO A ROTABLE LIQUID DRUM |
| CA2159567C (en) * | 1995-09-29 | 2004-05-25 | Herbert Gunter Joachim Langner | Rotary screening apparatus having an improved screening cylinder casing |
| JPH10156111A (en) * | 1996-11-26 | 1998-06-16 | Kyoei Kogyo Kk | Rotary screen filter |
| JPH10192615A (en) | 1997-01-08 | 1998-07-28 | Nishihara Environ Sanit Res Corp | Sludge removing device |
| KR100904283B1 (en) | 2009-03-05 | 2009-06-25 | 한국환경기계주식회사 | Disposal equipment of impurities |
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2018
- 2018-05-25 JP JP2018100938A patent/JP6384015B1/en active Active
-
2019
- 2019-05-23 SG SG11202010219XA patent/SG11202010219XA/en unknown
- 2019-05-23 CN CN201980025833.4A patent/CN112105433B/en active Active
- 2019-05-23 WO PCT/JP2019/020467 patent/WO2019225700A1/en active Application Filing
- 2019-05-23 KR KR1020207029846A patent/KR102534339B1/en active IP Right Grant
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06149073A (en) * | 1992-10-30 | 1994-05-27 | Ricoh Co Ltd | Wet type developing device |
| JPH07213828A (en) * | 1994-02-10 | 1995-08-15 | Tamaki Sekkei:Kk | Gravity filtration type rotary drum screen |
| JP2002177712A (en) * | 2000-12-15 | 2002-06-25 | Ebara Jitsugyo Co Ltd | Rotary drum screen for solid/liquid separation, and sludge concentration device using the same |
| JP2007330920A (en) * | 2006-06-16 | 2007-12-27 | Hiroshi Yamashita | Drum screen and concentrator equipped with same |
| TW201102354A (en) * | 2009-07-03 | 2011-01-16 | Amukon Kk | Sludge flocculating apparatus and sludge treatment apparatus having the same |
| WO2013166822A1 (en) * | 2012-05-07 | 2013-11-14 | 西安交通大学 | Two-sectional drum screen for municipal solid waste |
| US20180021816A1 (en) * | 2015-01-29 | 2018-01-25 | Oijense Bovendijk B.V. | Screening device and method for separating dry granular material |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116143368A (en) * | 2021-11-19 | 2023-05-23 | 三菱重工环境·化学工程株式会社 | Screen device |
| CN116747593A (en) * | 2023-08-16 | 2023-09-15 | 兴合环保科技(山东)有限公司 | Sewage purification device |
| CN116747593B (en) * | 2023-08-16 | 2023-10-27 | 兴合环保科技(山东)有限公司 | Sewage purification device |
Also Published As
| Publication number | Publication date |
|---|---|
| SG11202010219XA (en) | 2020-11-27 |
| KR20200133770A (en) | 2020-11-30 |
| JP6384015B1 (en) | 2018-09-05 |
| CN112105433B (en) | 2022-04-08 |
| WO2019225700A1 (en) | 2019-11-28 |
| KR102534339B1 (en) | 2023-05-18 |
| JP2019202302A (en) | 2019-11-28 |
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