CN112156524A - Papermaking white water filtering device and filtering process - Google Patents

Papermaking white water filtering device and filtering process Download PDF

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Publication number
CN112156524A
CN112156524A CN202010973500.9A CN202010973500A CN112156524A CN 112156524 A CN112156524 A CN 112156524A CN 202010973500 A CN202010973500 A CN 202010973500A CN 112156524 A CN112156524 A CN 112156524A
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CN
China
Prior art keywords
shell
water
pipe
filtering
driving
Prior art date
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Granted
Application number
CN202010973500.9A
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Chinese (zh)
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CN112156524B (en
Inventor
杨芳华
桂灿
张广文
赖德坤
李锦刚
李勇
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Shanying Huazhong Paper Co ltd
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Shanying Huazhong Paper Co ltd
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Priority to CN202010973500.9A priority Critical patent/CN112156524B/en
Publication of CN112156524A publication Critical patent/CN112156524A/en
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Publication of CN112156524B publication Critical patent/CN112156524B/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D29/00Other filters with filtering elements stationary during filtration, e.g. pressure or suction filters, or filtering elements therefor
    • B01D29/11Other filters with filtering elements stationary during filtration, e.g. pressure or suction filters, or filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
    • B01D29/117Other filters with filtering elements stationary during filtration, e.g. pressure or suction filters, or filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements arranged for outward flow filtration
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D29/00Other filters with filtering elements stationary during filtration, e.g. pressure or suction filters, or filtering elements therefor
    • B01D29/62Regenerating the filter material in the filter
    • B01D29/66Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps

Abstract

The invention relates to the technical field of papermaking, and discloses a papermaking white water filtering device which comprises a shell, wherein a filtering shell and a rotating cylinder vertically penetrating through the shell and the filtering shell are arranged in the shell, a plurality of stirring sheets are arranged on the side wall of the rotating cylinder, a plurality of flushing holes are formed in the stirring sheets in a penetrating manner, a flushing pipe is rotatably connected with the top of the rotating cylinder, and the flushing pipe is communicated with the rotating cylinder; the driving motor is provided with driving teeth, and the rotating cylinder is provided with driven teeth meshed with the driving teeth; the water inlet pipe is communicated with the top of the filter shell; the water outlet pipe is communicated with the shell, and the end part of the water outlet pipe connected with the shell is positioned outside the filter shell; the bottom of the discharge pipe is detachably provided with a discharge cover, the discharge pipe is communicated with the shell, and the end part of the discharge pipe connected with the shell is positioned in the filter shell. The invention has high filtering efficiency.

Description

Papermaking white water filtering device and filtering process
Technical Field
The invention relates to the technical field of papermaking, in particular to a papermaking white water filtering device and a filtering process.
Background
The water removed during the formation of the paper web in the wet end of the paper machine, as well as the water further removed by the vacuum boxes and presses, is collectively referred to in the papermaking industry as "white water". The white water contains fibers, fillers and soluble papermaking chemicals, the substances can be recycled by separation, the filtered water can be used for spraying operation at process points with low requirements on water quality, and the raw material yield can be greatly improved, the cost is saved and the pollution discharge is reduced after the white water is treated.
At present, a chinese patent with publication number CN 105617756B on the market discloses a compound white water filter, which can filter white water well, but the fibers are easy to adhere to the inner wall of the filter screen when filtering, thereby affecting the subsequent water passing through the filter screen and resulting in low filtering efficiency.
Disclosure of Invention
The invention aims to provide a papermaking white water filtering device and a filtering process, and aims to solve the problem of low filtering efficiency.
The technical purpose of the invention is realized by the following technical scheme: a papermaking white water filtering device comprises
The device comprises a shell, wherein a porous filter shell is arranged in the shell, a hollow rotating cylinder is vertically arranged through the shell and the filter shell and is in rotating connection with the shell and the filter shell, a plurality of stirring sheets are arranged on the side wall of the rotating cylinder, a plurality of flushing holes are formed through the stirring sheets, one ends of the flushing holes are communicated with the rotating cylinder, and the other ends of the flushing holes penetrate through the end parts of the stirring sheets, which are far away from the rotating cylinder;
the flushing pipe is rotatably connected with the top of the rotating cylinder and is communicated with the rotating cylinder;
the driving motor is provided with driving teeth, and the rotating cylinder is provided with driven teeth meshed with the driving teeth;
the water inlet pipe is communicated with the top of the filter shell;
the water outlet pipe is communicated with the shell, and the end part of the water outlet pipe connected with the shell is positioned outside the filter shell;
the bottom detachable of bleeder line is provided with emits the lid, the bleeder line with the shell communicates with each other, just the bleeder line with the tip that the shell is connected is located the inside of filter shell.
The invention is further provided with: the stirring sheet comprises a connecting part connected with the rotating cylinder and a driving part with a circular arc-shaped cross section, and the connecting part and the driving part are L-shaped in cross section.
The invention is further provided with: : the water inlet pipe is provided with two, two water inlet pipes are symmetrically distributed on two sides of the rotating drum, the bottom of each water inlet pipe is communicated with the corresponding water inlet pipe and is provided with a porous water distribution pipe, the water distribution pipes are annular and are communicated with the two water inlet pipes, and the water distribution pipes are located in the filter shell.
The invention is further provided with: the bottom of the shell is provided with a return pipe communicated with the shell, the part of the return pipe connected with the shell is positioned outside the filter shell, the return pipe is provided with a return pump, and the top end of the return pipe is communicated with the flushing pipe.
The invention is further provided with: the discharge pipe is connected to the middle part of the shell, and the connection part of the return pipe and the shell and the connection part of the water outlet pipe and the shell are symmetrically distributed on two sides of the discharge pipe.
The invention is further provided with: the filter shell is including being porous filter house and being located the barrier part of filter house bottom, the stirring piece is located in the filter house, the top of barrier part is provided with a plurality of spinal branch vaulting poles, a plurality of the middle part level of bracing piece is provided with porous backward flow sieve, the bottom of rotating the section of thick bamboo with the backward flow sieve rotates and connects, the backward flow sieve the bracing piece and the inner wall of barrier part encloses to close and forms the discharge orifice, articulated on the bracing piece be provided with discharge orifice matched with crosses the class board, cross the class board the bottom with be provided with the elastic component between the bottom of shell, it is located to cross the class board under the drive division.
The invention is further provided with: the overflowing holes are uniformly arranged on the periphery of the blocking part.
The invention is further provided with: the bottom of the driving part is obliquely provided with a driving plate, and the driving plate is in a curved surface shape.
The invention is further provided with: the two adjacent sides of the driving plate are respectively connected with the driving part and the connecting part.
The invention also provides a process for filtering by using the papermaking white water filtering device, which comprises the following steps:
s1, white water enters the filter shell through the water inlet pipe;
s2, driving a driving gear by a driving motor, driving the rotating cylinder and the stirring sheet to rotate by the driving gear, and driving water to flow through the rotating cylinder;
s3, discharging the filtered water through a water outlet pipe;
s4, injecting washing water into the rotary cylinder through the washing pipe, wherein the washing water acts on the inner wall of the rotary cylinder after passing through the rotary cylinder and the washing hole in sequence and washes the inner wall of the rotary cylinder;
and S5, stopping water inflow, driving the motor to continuously run, continuously supplying water to the flushing pipe, opening the discharging cover, and discharging the liquid in the shell.
The invention has the beneficial effects that: the method comprises the following steps that firstly, white water enters a filter shell through a water inlet pipe, and then a driving motor drives a driven gear, a rotating cylinder and a stirring sheet to rotate through a driving gear so as to drive the white water to flow; the white water generates centrifugal force under the driving action of the stirring sheet and enters between the filter shell and the outer shell through the filter shell under the action of the self gravity of the white water, and the white water is relatively clean water and can be used for flushing or other purposes. In the process of filtering the white water, the flushing pipe injects flushing water into the rotary drum, the flushing water can stir the water in the filter shell, so that all the water can participate in the filtering, and secondly, the fibers adhered or attached to the inner wall of the filter shell can be flushed, so that the filter shell can be kept in a better filtering state, the filtering effect (if some smaller fibers are adhered to the inner wall of the filter shell all the time, the part of the fibers are possibly flushed into the space between the outer shell and the filter shell) and the filtering efficiency are ensured.
When the filtration is finished for a period of time or the liquid in the filter shell needs to be cleaned, the injection of new white water is stopped firstly, but the rotary drum still keeps rotating, the flushing pipe still keeps injecting flushing water, after the discharging cover is opened, the water with more fibers is discharged from the filter shell, and meanwhile, the water in the flushing hole still keeps flushing, so that the fibers can be prevented from being adhered to the inner wall of the filter shell, and meanwhile, the fibers can be prevented from entering the flushing hole, and the subsequent flushing and the filtration can be stably carried out.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic view showing the structure of one embodiment of a papermaking white water filtering apparatus according to the present invention;
fig. 2 is a first cross-sectional view of an embodiment of a papermaking white water filtering device of the present invention;
FIG. 3 is an enlarged view of portion A of FIG. 2;
FIG. 4 is an enlarged view of portion B of FIG. 2;
fig. 5 is a second cross-sectional view of one embodiment of a papermaking white water filtering device of the present invention;
FIG. 6 is an enlarged view of portion C of FIG. 5;
fig. 7 is a third cross-sectional view of an embodiment of a papermaking white water filtering device of the present invention;
fig. 8 is an internal schematic view of an embodiment of a partial structure in a papermaking white water filtering apparatus according to the present invention;
fig. 9 is a first schematic view of the interior of an embodiment of a rotary drum and a stirring blade portion of a papermaking white water filtering device according to the present invention;
fig. 10 is a second schematic view of the inside of an embodiment of a rotary drum and a stirring blade part of the papermaking white water filtering device according to the present invention;
fig. 11 is an internal schematic view of an embodiment of an overflow plate in a papermaking white water filtering device according to the present invention.
In the figure, 1, a housing; 2. a filter shell; 2a, a filter part; 2b, a blocking part; 3. a rotating cylinder; 4. a stirring sheet; 4a, a connecting part; 4b, a driving part; 5. flushing the hole; 6. a flush tube; 7. a drive motor; 8. a driving tooth; 9. a driven tooth; 10. a water inlet pipe; 11. a water outlet pipe; 12. discharging a pipe; 13. a discharge cap; 14. a water distribution pipe; 15. a return pipe; 16. a reflux pump; 17. a support bar; 18. a reflux screen; 19. an overflow plate; 20. an elastic member; 21. a drive plate.
Detailed Description
The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings and specific embodiments. It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without any inventive step, are within the scope of the present invention.
A papermaking white water filtering device, as shown in fig. 1 to 11, comprises
The device comprises a shell 1, wherein a porous filter shell 2 is arranged in the shell 1, a hollow rotating cylinder 3 is vertically arranged to penetrate through the shell 1 and the filter shell 2 and is rotatably connected with the shell 1 and the filter shell 2, a plurality of stirring sheets 4 are arranged on the side wall of the rotating cylinder 3, a plurality of flushing holes 5 are formed through the stirring sheets 4, one end of each flushing hole 5 is communicated with the rotating cylinder 3, and the other end of each flushing hole 5 penetrates through the end part of each stirring sheet 4 far away from the rotating cylinder 3;
the flushing pipe 6 is rotatably connected with the top of the rotating cylinder 3, and the flushing pipe 6 is communicated with the rotating cylinder 3;
the driving gear 8 is arranged on the driving motor 7, and the driven gear 9 meshed with the driving gear 8 is arranged on the rotating cylinder 3;
the water inlet pipe 10 is communicated with the top of the filter shell 2;
the water outlet pipe 11 is communicated with the shell 1, and the end part of the water outlet pipe 11 connected with the shell 1 is positioned outside the filter shell 2;
a discharge pipe 12, a discharge cover 13 is detachably arranged at the bottom of the discharge pipe 12, the discharge pipe 12 is communicated with the housing 1, and the end part of the discharge pipe 12 connected with the housing 1 is positioned in the filter housing 2. The stirring sheet 4 comprises a connecting part 4a connected with the rotating cylinder 3 and a driving part 4b with a circular arc-shaped cross section, and the cross sections of the connecting part 4a and the driving part 4b are L-shaped.
The water inlet pipes 10 are provided with two water inlet pipes 10 which are symmetrically distributed on two sides of the rotary drum 3, the bottoms of the water inlet pipes 10 are communicated with the water inlet pipes 10 and are provided with porous water distribution pipes 14, the water distribution pipes 14 are annular, the water distribution pipes 14 are communicated with the two water inlet pipes 10, and the water distribution pipes 14 are positioned in the filter shell 2. The bottom of the shell 1 is provided with a return pipe 15 communicated with the shell 1, the part of the return pipe 15 connected with the shell 1 is positioned outside the filter shell 2, the return pipe 15 is provided with a return pump 16, and the top end of the return pipe 15 is communicated with the flushing pipe 6. The discharge pipe 12 is connected to the middle of the housing 1, and the connection between the return pipe 15 and the housing 1 and the connection between the water outlet pipe 11 and the housing 1 are symmetrically distributed on both sides of the discharge pipe 12.
The filter shell 2 is including being porous filter part 2a and being located the barrier part 2b of filter part 2a bottom, stirring piece 4 is located in filter part 2a, the top of barrier part 2b is provided with a plurality of spinal branch vaulting poles 17, a plurality of the middle part level of bracing piece 17 is provided with porous backwash sieve 18, the bottom of rotating section of thick bamboo 3 with backwash sieve 18 rotates and connects, backwash sieve 18 bracing piece 17 and barrier part 2 b's inner wall encloses to close and forms the discharge orifice, articulated on the bracing piece 17 be provided with discharge orifice matched with overflows board 19, the bottom of overflowing board 19 with be provided with elastic component 20 between the bottom of shell 1, it is located to cross board 19 drive part 4b under. The overflowing holes are uniformly arranged on the periphery of the blocking part 2 b.
The driving plate 21 is obliquely arranged at the bottom of the driving part 4b, and the driving plate 21 is curved. Two adjacent sides of the driving plate 21 are connected to the driving portion 4b and the connecting portion 4a, respectively.
The invention also provides a process for filtering by using the papermaking white water filtering device, which comprises the following steps:
s1, the white water enters the filtering shell 2 through the water inlet pipe 10;
s2, driving the driving gear 8 by the driving motor 7, driving the rotating cylinder 3 and the stirring sheet 4 to rotate by the driving gear 8, and driving water to flow through the rotating cylinder 3;
s3, discharging the filtered water through the water outlet pipe 11;
s4, injecting washing water into the rotary drum 3 through the washing pipe 6, wherein the washing water passes through the rotary drum 3 and the washing hole 5 in sequence, then acts on the inner wall of the rotary drum 3, and washes the inner wall of the rotary drum 3;
and S5, stopping water inflow, continuously running the driving motor 7, continuously leading water to the washing pipe 6, opening the discharging cover 13 and discharging the liquid in the shell 1.
The invention provides a papermaking white water filtering device and a filtering process.A white water enters a filtering shell 2 through a water inlet pipe 10, and then a driving motor 7 drives a driven tooth 9, a rotating cylinder 3 and a stirring sheet 4 to rotate through a driving tooth 8 so as to drive the white water to flow; the white water, which is relatively clear water and can be used for rinsing or other purposes, is driven by the stirring blade 4 to generate centrifugal force and passes through the filter housing 2 to enter between the filter housing 2 and the housing 1 under the action of its own gravity. In the white water filtering process, the flushing pipe 6 injects flushing water into the rotary drum 3, the flushing water can not only stir the water in the filter shell 2, so that all the water can participate in the filtering, but also flush the fibers adhered or attached to the inner wall of the filter shell 2, so that the filter shell 2 can be kept in a better filtering state, the filtering effect (if some smaller fibers are adhered to the inner wall of the filter shell 2 all the time, the fibers are possibly flushed into the space between the outer shell 1 and the filter shell 2) and the filtering efficiency are both ensured.
When the filtration is finished for a period of time or the liquid in the filter shell 2 needs to be cleaned, the injection of new white water is stopped at first, but the rotary drum 3 still keeps rotating, the flushing pipe 6 still keeps injecting flushing water, after the discharging cover 13 is opened, the water with more fibers is discharged from the filter shell 2, and simultaneously, because the water in the flushing holes 5 still keeps flushing, the fibers can be prevented from adhering to the inner wall of the filter shell 2, and simultaneously, the fibers can be prevented from entering the flushing holes 5, so that the subsequent flushing and the filtration can be stably carried out.
Because the driving part 4b is arc-shaped and the distance between the driving part 4b and the inner wall of the filter shell 2 is smaller and smaller, when the driving part 4b rotates under the driving action of the connecting part 4a, the driving part 4b has driving acting force for driving water flow to flow towards the outside of the filter shell 2, namely the driving part 4b can accelerate the speed and efficiency of the water passing through the filter shell 2, and secondly, when the washed water flows out from the washing hole 5, the washed water can be impacted on the inner wall of the filter shell 2 at a smaller included angle, so that fibers adhered to the inner wall of the filter shell 2 can be washed down; wherein, the washing holes 5 are provided in a plurality in the height direction of the whole stirring sheet 4, thus the washing comprehensiveness is better.
When water enters, the two water inlet pipes 10 are communicated with one header pipe, then the water in the header pipe enters the water distribution pipes 14 through the two water inlet pipes 10 respectively, and finally flows into the filter shell 2 through holes (larger) on the water distribution pipes 14, and the water can uniformly flow into the filter shell 2 because the water distribution pipes 14 are annular, so that the white water is better in distribution uniformity and better in filtering effect.
The return pipe 15 is communicated with the shell 1, so that relatively clean filtered water flows back to the rotary drum 3 for washing without an additional traction water pipe and the like, and the cost and the practicability are saved; meanwhile, if a small part of large limit is flushed between the shell 1 and the filter shell 2, the return pipe 15 can pump the part of limit back to the filter shell 2 again for secondary filtration, and the filtering effect is better. The outlet pipe 11 and the return pipe 15 are connected to both sides of the housing 1, so that the water filtered by the filter housing 2 is prevented from being excessively supplied in a portion thereof and being shut off in another portion thereof.
When filtering, the filtering part 2a can perform normal filtering, but the peripheral wall of the blocking part 2b is planar (i.e. has no holes), so that firstly, the filtering part can prevent filtered water from flowing back into the filtering shell 2 again, and secondly, the bottom of the rotary drum 3 is rotatably connected to the backflow screen 18 (hard and has great structural strength), so that the position stability of the rotary drum 3 is better, and meanwhile, the stress between the rotary drum 3 and the top of the filtering shell 2 is reduced, and the structural stability is ensured.
When the stirring sheet 4 rotates, the curved driving plate 21 also drives the water flow to flow downwards, after the part of the water flow acts on the over-flow plate 19, the over-flow plate 19 can be driven to rotate downwards, meanwhile, the elastic element 20, namely the spring is compressed, then the water with more fibers enters the blocking part 2b, but because the space of the blocking part 2b is limited, when the subsequent water still continuously enters the blocking part 2b, the water in the blocking part 2b can only flow back to the filtering part 2a through the back-flow screen 18 in the middle part at the moment, and the water is filtered by the back-flow screen 18 again in the process, so the fibers can be better blocked in the blocking part 2b, and meanwhile, the part of the water is prevented from being repeatedly filtered in the filtering shell 2 due to the limit, and the filtering effect in the filtering part 2a is ensured.
Since the driving plate 21 is only located right above the flow plate 19, the water driven by the driving plate 21 enters the blocking portion 2b through the flow plate 19 with the highest probability, and when the water in the blocking portion 2b flows outwards, firstly, the water driven by the driving plate 21 can prevent the water flowing outwards from passing through the flow holes, and secondly, the elastic member 20 can prevent the water from directly flowing back into the filtering portion 2a through the flow holes; however, since there is no agitating blade 4 portion of the driving plate 21, the resistance at the bottom thereof is small, so that the water is mainly returned through the return screen 18 when the water is returned. The drive plate 21 is connected to the connecting portion 4a and the drive portion 4b on its adjacent sides, thereby ensuring positional stability of the drive plate 21.
It should be noted that, in the present specification, the embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments may be referred to each other.
The above description is only for the purpose of describing the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention, and any variations and modifications made by those skilled in the art based on the above disclosure are within the scope of the appended claims.

Claims (10)

1. A papermaking white water filter equipment which characterized in that: comprises that
The washing device comprises a shell (1), wherein a porous filtering shell (2) is arranged in the shell (1), a hollow rotating cylinder (3) vertically penetrates through the shell (1) and the filtering shell (2) and is rotatably connected with the shell (1) and the filtering shell (2), a plurality of stirring sheets (4) are arranged on the side wall of the rotating cylinder (3), a plurality of washing holes (5) are formed in the way of penetrating through the stirring sheets (4), one end of each washing hole (5) is communicated with the rotating cylinder (3), and the other end of each washing hole penetrates through the end part, far away from the rotating cylinder (3), of each stirring sheet (4);
the flushing pipe (6) is rotatably connected with the top of the rotating cylinder (3), and the flushing pipe (6) is communicated with the rotating cylinder (3);
the driving gear (8) is arranged on the driving motor (7), and the driven gear (9) meshed with the driving gear (8) is arranged on the rotating cylinder (3);
the water inlet pipe (10), the water inlet pipe (10) is communicated with the top of the filter shell (2);
the water outlet pipe (11) is communicated with the shell (1), and the end part of the water outlet pipe (11) connected with the shell (1) is positioned outside the filter shell (2);
a discharge pipe (12), the bottom of the discharge pipe (12) is detachably provided with a discharge cover (13), the discharge pipe (12) is communicated with the shell (1), and the end part of the discharge pipe (12) connected with the shell (1) is positioned in the filter shell (2).
2. The papermaking white water filtering device according to claim 1, characterized in that: the stirring sheet (4) comprises a connecting part (4a) connected with the rotating cylinder (3) and a driving part (4b) with a circular arc-shaped cross section, and the cross sections of the connecting part (4a) and the driving part (4b) are L-shaped.
3. The papermaking white water filtering device according to claim 1, characterized in that: the water inlet pipe (10) is provided with two, two water inlet pipes (10) are symmetrically distributed on two sides of the rotary drum (3), the bottom of each water inlet pipe (10) is communicated with the corresponding water inlet pipe (10) and is provided with a porous water distribution pipe (14), the water distribution pipes (14) are annular, the water distribution pipes (14) are communicated with the two water inlet pipes (10), and the water distribution pipes (14) are located in the filter shell (2).
4. The papermaking white water filtering device according to claim 1, characterized in that: the bottom of the shell (1) is provided with a return pipe (15) communicated with the shell (1), the part of the return pipe (15) connected with the shell (1) is positioned outside the filter shell (2), the return pipe (15) is provided with a return pump (16), and the top end of the return pipe (15) is communicated with the flushing pipe (6).
5. Papermaking white water filtering device according to claim 4, characterized in that: the discharge pipe (12) is connected to the middle of the shell (1), and the connection part of the return pipe (15) and the shell (1) and the connection part of the water outlet pipe (11) and the shell (1) are symmetrically distributed on two sides of the discharge pipe (12).
6. The papermaking white water filtering device according to claim 2, characterized in that: the filter shell (2) comprises a porous filter part (2a) and a blocking part (2b) positioned at the bottom of the filter part (2a), the stirring sheet (4) is positioned in the filtering part (2a), the top of the blocking part (2b) is provided with a plurality of supporting rods (17), the middle parts of the supporting rods (17) are horizontally provided with a porous backflow screen (18), the bottom of the rotating cylinder (3) is rotationally connected with the reflux screen (18), the inner walls of the reflux screen (18), the support rod (17) and the blocking part (2b) are enclosed to form an overflowing hole, an overflow plate (19) matched with the overflow hole is hinged on the supporting rod (17), an elastic piece (20) is arranged between the bottom of the overflowing plate (19) and the bottom of the shell (1), and the overflowing plate (19) is located right below the driving part (4 b).
7. Papermaking white water filtering device according to claim 6, characterized in that: the overflowing holes are uniformly arranged on the periphery of the blocking part (2 b).
8. Papermaking white water filtering device according to claim 6, characterized in that: the bottom of the driving part (4b) is obliquely provided with a driving plate (21), and the driving plate (21) is in a curved surface shape.
9. Papermaking white water filtering device according to claim 8, characterized in that: the two adjacent sides of the driving plate (21) are respectively connected with the driving part (4b) and the connecting part (4 a).
10. A process of filtering using the papermaking white water filtering apparatus according to any one of claims 1 to 9, characterized in that: the method comprises the following steps:
s1, the white water enters the filter shell (2) through the water inlet pipe (10);
s2, the driving motor (7) drives the driving tooth (8), the driving tooth (8) drives the rotating cylinder (3) and the stirring sheet (4) to rotate, and water is driven to flow through the rotating cylinder (3);
s3, discharging the filtered water through a water outlet pipe (11);
s4, injecting washing water into the rotary cylinder (3) through the washing pipe (6), wherein the washing water passes through the rotary cylinder (3) and the washing hole (5) in sequence, acts on the inner wall of the rotary cylinder (3), and washes the inner wall of the rotary cylinder (3);
and S5, stopping water inflow, driving the motor (7) to continuously run, continuously supplying water to the flushing pipe (6), opening the discharging cover (13), and discharging the liquid in the shell (1).
CN202010973500.9A 2020-09-16 2020-09-16 Papermaking white water filtering device and filtering process Active CN112156524B (en)

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CN112156524B CN112156524B (en) 2022-03-25

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