CN112023503A

CN112023503A - Sewage treatment device

Info

Publication number: CN112023503A
Application number: CN202011055286.5A
Authority: CN
Inventors: 姜灵彦; 刘蕾
Original assignee: Zhengzhou University of Aeronautics
Current assignee: Zhengzhou University of Aeronautics
Priority date: 2020-09-30
Filing date: 2020-09-30
Publication date: 2020-12-04
Anticipated expiration: 2040-09-30
Also published as: CN112023503B

Abstract

The invention relates to a sewage treatment device, which effectively solves the problems that sewage filtering equipment is difficult to stably maintain permeability for a long time, the back flushing efficiency is low and the equipment cost is high; the technical scheme includes that the device comprises a vertical pipe, a liquid inlet pipe is mounted on the side wall of the vertical pipe, a liquid outlet hole is formed in the upper end of the vertical pipe, a filter assembly capable of moving up and down in the vertical pipe is mounted in the vertical pipe, the filter assembly comprises a piston, a plurality of filter sheets and a bottom block, the plurality of filter sheets are stacked up and down and are arranged between the piston and the bottom block, a gap is reserved between the filter sheets, a first through hole is formed in each filter sheet, a vertical second through hole is formed in the piston, a cover plate is mounted at an upper port of each second through hole, and the liquid outlet hole is closed when the cover plate is opened in the upward movement process; the invention can always ensure the permeability of the filtering component in the using process, ensures the filtering efficiency for a long time, does not need to additionally add a filtering element, a back flushing pump, a reversing valve and the like, and reduces the volume and the cost of equipment.

Description

Sewage treatment device

Technical Field

The invention relates to the field of environmental engineering, in particular to a sewage treatment device.

Background

The sewage treatment is an important subject of environmental engineering, solid impurities in the sewage are generally filtered and removed by physical filtration, and after the sewage filtering device is used for a period of time, the impurities can be deposited in a filtering piece to block a filtering channel, so that the filtering flow is gradually reduced to be completely blocked; at present, a filtering piece is generally cleaned by a mode of stopping and backflushing periodically, but stubborn impurities are usually formed on the filtering piece due to long-time impurity deposition and are difficult to clean, the filtering efficiency is gradually reduced due to the gradual reduction of the filtering flow in the normal filtering process, and the permeability of the filtering piece is difficult to maintain stably for a long time; in addition, normal filtering operation cannot be performed during backflushing, efficiency is affected, some equipment adopts two or more filtering elements, replacement is performed during backflushing, one filtering element is backflushed without shutdown, but the size of the equipment is increased by the mode, and one filtering element is in an idle state, so that the equipment cost is high, and the utilization rate of the filtering element is low; furthermore, the existing backflushing equipment is provided with a backflushing pump or an annular valve, so that the equipment cost is further increased.

Disclosure of Invention

Aiming at the situation, in order to overcome the defects of the prior art, the invention provides a sewage treatment device, which effectively solves the problems that sewage filtering equipment is difficult to stably maintain permeability for a long time, the backwashing efficiency is low and the equipment cost is high.

The technical scheme of its solution is, a sewage treatment plant, including the standpipe, install the feed liquor pipe on the standpipe lateral wall, open the standpipe upper end has the liquid outlet, install the filter assembly that can reciprocate in the standpipe, filter assembly includes a piston of coaxial setting, the filter disc and a circular shape bottom block of a plurality of disc types, the piston is located the top and laminates with the standpipe inner wall, the bottom block is located the bottom, a plurality of filter discs are stacked up and down and are arranged in between piston and bottom block, the external diameter of filter disc and bottom block all is less than the internal diameter of standpipe, and leave the clearance between a plurality of filter discs, the centre of a circle position of every filter disc is opened a first through-hole; the filter component is provided with a pull rod capable of pulling the filter component to move up and down, the pull rod is connected with a driving device, the upper end of the pull rod penetrates out of the liquid outlet hole, the diameter of the pull rod is smaller than that of the liquid outlet hole, a plunger is fixed on the pull rod, and the liquid outlet hole can be sealed when the plunger moves to the position of the liquid outlet hole; a vertical second through hole is formed in the piston, a cover plate capable of moving up and down is installed at the upper end port of the second through hole, and a pull rope is connected between the upper surface of the cover plate and the top of the vertical pipe; when the filter assembly moves to the lowest end position, the piston seals the pipe opening of the liquid inlet pipe, the pull rope is tensioned, the cover plate is pulled open, the second through hole is opened, and the plunger is positioned in the liquid outlet hole to seal the liquid outlet hole.

The invention can always ensure the permeability of the filtering component in the using process, ensures the filtering efficiency for a long time, does not need to additionally add a filtering element, a back flushing pump, a reversing valve and the like, and reduces the volume and the cost of equipment.

Drawings

Fig. 1 is a front cross-sectional view of the present invention with the filter assembly uppermost.

Fig. 2 is a front cross-sectional view of the present invention with the filter assembly at the lowermost end.

Fig. 3 is a schematic view showing the flow direction of liquid when the filter assembly is moved downward.

FIG. 4 is a schematic view of the flow of liquid during back flushing of the filter assembly.

Fig. 5 is an enlarged view of the position a in fig. 1.

Detailed Description

The following description of the embodiments of the present invention will be made in detail with reference to the accompanying drawings.

As shown in fig. 1 to 5, the vertical tube type liquid filter comprises a vertical tube 1, a liquid inlet pipe 2 is mounted on the side wall of the vertical tube 1, a liquid outlet hole 3 is formed in the upper end of the vertical tube 1, a filter assembly capable of moving up and down in the vertical tube 1 is mounted in the vertical tube 1, the filter assembly comprises a piston 4, a plurality of disc-shaped filter sheets 5 and a circular bottom block 6 which are coaxially arranged, the piston 4 is positioned at the uppermost part and is attached to the inner wall of the vertical tube 1, the bottom block 6 is positioned at the lowermost part, the plurality of filter sheets 5 are stacked between the piston 4 and the bottom block 6 in an up-and-down manner, the outer diameters of the filter sheets 5 and the bottom block 6 are smaller than the inner diameter of the vertical tube 1, gaps are reserved between the plurality of filter sheets 5, and a first; a pull rod 8 capable of pulling the filter assembly to move up and down is installed on the filter assembly, the pull rod 8 is connected with a driving device, the upper end of the pull rod 8 penetrates out of the liquid outlet hole 3, the diameter of the pull rod 8 is smaller than that of the liquid outlet hole 3, a plunger 9 is fixed on the pull rod 8, and the liquid outlet hole 3 can be sealed when the plunger 9 moves to the position of the liquid outlet hole 3; a vertical second through hole 10 is formed in the piston 4, a cover plate 11 capable of moving up and down is installed at the upper port of the second through hole 10, and a pull rope 12 is connected between the upper surface of the cover plate 11 and the top of the vertical pipe 1; when the filter assembly moves to the lowest end position, the piston 4 seals the pipe opening of the liquid inlet pipe 2, the pull rope 12 is tensioned, the cover plate 11 is pulled open, the second through hole 10 is opened, and the plunger 9 is positioned in the liquid outlet hole 3 to seal the liquid outlet hole 3.

A plurality of salient points 13 are uniformly distributed on the circumference of the lower surface of each filter plate 5, the pull rod 8 sequentially penetrates through the piston 4, the filter plates 5 and the bottom block 6, nuts 14 positioned at two ends of the filter assembly are screwed on the pull rod 8, and after the two nuts 14 are screwed down, the salient points 13 on the upper filter plate 5 are pressed on the lower filter plate 5, so that gaps are formed between the filter plates 5.

The driving device comprises a vertical rack 15 fixed above the pull rod 8, teeth are arranged on the left side and the right side of the rack 15, an incomplete gear 16 meshed with the rack 15 is arranged on each side of the rack 15, the two incomplete gears 16 are the same as steering, the two incomplete gears 16 are not meshed with the rack 15 at the same time, the two incomplete gears 16 can drive the gears to move up and down alternately, and therefore the pull rod 8 pulls the filter assembly to move up and down.

1 lateral wall of standpipe on the circumference equipartition install a plurality of vertical communicating pipes 17, a plurality of communicating pipes 17 circumference equipartitions just are located the below of feed liquor pipe 2, the last lower extreme of communicating pipe 17 all with 1 inside intercommunications of standpipe, be equipped with on 1 inner wall of standpipe one with communicating pipe 17 upper end down along the protruding edge 18 of parallel and level, protruding edge 18 can accept along the liquid of 1 inner wall downdraught of standpipe and will accept the liquid through communicating pipe 17 water conservancy diversion to 1 bottom of standpipe.

The 1 inner wall of standpipe on be equipped with a plurality of dirty boards 19 that keep off, keep off dirty board 19 inner downward sloping and a plurality of dirty board 19 crisscross arrangement from top to bottom, keep off dirty board 19 and can prevent that the filth of 1 bottoms of standpipe from upwards turning over and gushing.

A first switch valve 20 and a second switch valve 21 are installed at the lower end of the vertical pipe 1, and the first switch valve 20 is positioned above the second switch valve 21; during normal use, first ooff valve 20 opens, and second ooff valve 21 closes, and the filth deposit of standpipe 1 bottom is between first ooff valve 20 and second ooff valve 21, closes first ooff valve 20 during the blowdown, opens second ooff valve 21, and the filth is discharged from standpipe 1 lower extreme.

The liquid inlet pipe 2 is provided with a liquid inlet one-way valve 22, so that the liquid in the vertical pipe 1 can be prevented from flowing back.

A plurality of vertical sliding rods 23 are uniformly distributed and fixed on the circumference of the lower end of the cover plate 11, and the sliding rods 23 penetrate through the piston 4, so that the cover plate 11 can slide up and down.

The filter plates 5 are in the shape of a conical disc with the small ends facing upwards, so that the outer edge of a gap formed between the filter plates 5 is lower than the inner edge, and impurities in the gap can be washed away more smoothly during back flushing.

When the filter is used, the outer end of the liquid inlet pipe 2 is connected with a sewage source, the driving device pulls the filter assembly to move upwards through the pull rod 8, negative pressure is formed below the piston 4, sewage enters the vertical pipe 1 from the liquid inlet pipe 2 under the action of the negative pressure, the vertical pipe 1 is filled with the sewage after the filter assembly moves to the uppermost end, then the pull rod 8 pushes the filter assembly to move downwards, the piston 4 extrudes the sewage below, the sewage flows to the upper side of the piston 4 through the gap between the filter discs 5, the first through hole 7 and the second through hole 10 and pushes the cover plate 11 open, and impurities in the sewage are filtered through the gap between the filter discs 5.

When the filter assembly moves to the lowest end position, the piston 4 seals the pipe orifice of the liquid inlet pipe 2, the pull rope 12 is tensioned, the second through hole 10 is in an open state, and the plunger 9 is positioned in the liquid outlet hole 3 to seal the liquid outlet hole 3; then the piston 4 moves upwards from the lowest position, at the moment, the liquid level below the piston 4 is lower than the position of the convex edge 18, the piston 4 moves upwards to extrude the liquid above the piston 4, the liquid outlet hole 3 is sealed by the plunger 9, the second through hole 10 is in an open state, the liquid above the piston 4 flows to the lower part of the piston 4 through the second through hole 10, the gap between the first through hole 7 and the filter 5, the gap of the filter 5 is backflushed, the backflushed liquid flows into the convex edge 18 along the inner wall of the vertical pipe 1 and then is injected into the bottom of the vertical pipe 1 through the communicating pipe 17, the liquid inlet pipe 2 is sealed by the piston 4 during the backflushing period and does not feed water into the first vertical pipe 1, and the backflushing liquid can smoothly flow into the convex edge 18 and is injected into the bottom of the first.

When piston 4 upward movement reached with apron 11 laminating, second through-hole 10 was closed, and plunger 9 withdraws from going out liquid hole 3 this moment, and piston 4 moves away from 2 mouths of tubes of feed liquor pipe, and piston 4 continues the rebound, and apron 11 seals second through-hole 10 all the time under the effect of liquid reaction force, and the water of piston 4 top is discharged from going out liquid hole 3, and simultaneously, piston 4 below forms the negative pressure, and feed liquor pipe 2 inputs sewage in to standpipe 1, opens next circulation.

Impurities which are backflushed down are settled between the first switch valve 20 and the second switch valve 21 through the communicating pipe 17, the dirt blocking plate 19 can prevent the impurities from upwards surging when liquid enters the vertical pipe 1, when slag is required to be discharged, the first switch valve 20 is firstly closed, then the second switch valve 21 is opened, the impurities at the bottom of the vertical pipe 1 are discharged from the lower section of the vertical pipe 1, and after the slag is discharged, the second switch valve 21 is closed, and the first switch valve 20 is opened.

According to the invention, after each filtration, a small part of filtrate is used for backflushing the filtration gap, so that impurities can be effectively prevented from adhering and depositing on the filter sheet 5 to form stubborn impurities, thus the long-time use of the filter assembly can be ensured without blockage, the shutdown cleaning is not required, the permeability of the filter assembly is ensured all the time in the use process, the filtration efficiency is ensured for a long time, and a filter element, a backflushing pump, a reversing valve and the like are not required to be additionally added, so that the equipment volume and the cost are reduced; in addition, the impurity deposit of recoil can not upwards turn over and gush at standpipe 1 bottom, avoids standpipe 1 filter segment to gather impurity gradually, through the cooperation of first ooff valve 20 and second ooff valve 21, can be under the circumstances of not shutting down convenient row sediment.

Claims

1. The utility model provides a sewage treatment device, a serial communication port, including standpipe (1), install feed liquor pipe (2) on standpipe (1) lateral wall, standpipe (1) upper end is opened there is liquid outlet hole (3), install the filter assembly that can reciprocate in standpipe (1), filter assembly includes a piston (4) of coaxial setting, the cassette (5) and a circular shape bottom block (6) of a plurality of disc types, piston (4) are located the top and laminate with standpipe (1) inner wall, bottom block (6) are located the bottom, a plurality of cassettes (5) are range upon range of from top to bottom and are arranged in between piston (4) and bottom block (6), the external diameter of cassette (5) and bottom block (6) all is less than the internal diameter of standpipe (1), gaps are reserved among the plurality of filter sheets (5), and the circle center of each filter sheet (5) is provided with a first through hole (7); a pull rod (8) capable of pulling the filter assembly to move up and down is mounted on the filter assembly, the pull rod (8) is connected with a driving device, the upper end of the pull rod (8) penetrates out of the liquid outlet hole (3), the diameter of the pull rod (8) is smaller than that of the liquid outlet hole (3), a plunger (9) is fixed on the pull rod (8), and the liquid outlet hole (3) can be sealed when the plunger (9) moves to the position of the liquid outlet hole (3); a vertical second through hole (10) is formed in the piston (4), a cover plate (11) capable of moving up and down is installed at an upper port of the second through hole (10), and a pull rope (12) is connected between the upper surface of the cover plate (11) and the top of the vertical pipe (1); when the filter assembly moves to the lowest end position, the piston (4) seals the pipe opening of the liquid inlet pipe (2), the pull rope (12) is tensioned, the cover plate (11) is pulled open, the second through hole (10) is opened, and the plunger (9) is positioned in the liquid outlet hole (3) to seal the liquid outlet hole (3).

2. The sewage treatment device according to claim 1, wherein a plurality of convex points (13) are uniformly distributed on the circumference of the lower surface of each filter sheet (5), the pull rod (8) sequentially penetrates through the piston (4), the plurality of filter sheets (5) and the bottom block (6), nuts (14) positioned at two ends of the filter assembly are screwed on the pull rod (8), and after the two nuts (14) are screwed, the convex points (13) on the upper filter sheet (5) are pressed on the lower filter sheet (5) to form a gap between the filter sheets (5).

3. The sewage treatment device according to claim 1, wherein the driving device comprises a vertical rack (15) fixed above the pull rod (8), the left side and the right side of the rack (15) are provided with teeth, each side of the rack (15) is provided with an incomplete gear (16) meshed with the rack, the two incomplete gears (16) are the same as the steering direction, the two incomplete gears (16) are not meshed with the rack (15) at the same time, and the two incomplete gears (16) can alternately drive the gears to move up and down, so that the filter assembly is pulled to move up and down through the pull rod (8).

4. The sewage treatment device according to claim 1, wherein a plurality of vertical communicating pipes (17) are uniformly arranged on the side wall of the vertical pipe (1) along the circumference, the plurality of communicating pipes (17) are uniformly arranged on the circumference and are positioned below the liquid inlet pipe (2), the upper end and the lower end of each communicating pipe (17) are communicated with the inside of the vertical pipe (1), a convex edge (18) which is flush with the upper port of each communicating pipe (17) is arranged on the inner wall of the vertical pipe (1), and the convex edge (18) can receive liquid flowing downwards along the inner wall of the vertical pipe (1) and guide the received liquid to the bottom of the vertical pipe (1) through the communicating pipes (17).

5. The sewage treatment device according to claim 1, wherein a plurality of baffle plates (19) are arranged on the inner wall of the vertical pipe (1), the inner ends of the baffle plates (19) are inclined downwards, the baffle plates (19) are arranged in a vertically staggered manner, and the baffle plates (19) can prevent the sewage at the bottom of the vertical pipe (1) from upwards surging.

6. An apparatus for treating wastewater according to claim 1, characterized in that the lower end of said standpipe (1) is provided with a first on-off valve (20) and a second on-off valve (21), the first on-off valve (20) being located above the second on-off valve (21).

7. An apparatus for treating waste water according to claim 1, wherein the inlet pipe (2) is provided with an inlet check valve (22) for preventing the liquid in the standpipe (1) from flowing back.

8. The sewage treatment device according to claim 1, wherein a plurality of vertical sliding rods (23) are uniformly distributed and fixed on the circumference of the lower end of the cover plate (11), and the sliding rods (233) penetrate through the piston (4) so as to enable the cover plate (11) to slide up and down.

9. An apparatus for treating wastewater according to claim 1, characterized in that said filter sheet (5) is in the shape of a conical disk with its small end facing upwards.