CN113754011B - Paper mill is with paper pulp sewage treatment system - Google Patents
Paper mill is with paper pulp sewage treatment system Download PDFInfo
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- CN113754011B CN113754011B CN202110956431.5A CN202110956431A CN113754011B CN 113754011 B CN113754011 B CN 113754011B CN 202110956431 A CN202110956431 A CN 202110956431A CN 113754011 B CN113754011 B CN 113754011B
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- filter screen
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- sewage
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- 239000010865 sewage Substances 0.000 title claims abstract description 112
- 229920001131 Pulp (paper) Polymers 0.000 title abstract description 12
- 238000001914 filtration Methods 0.000 claims abstract description 38
- 238000000034 method Methods 0.000 claims abstract description 9
- 239000004576 sand Substances 0.000 claims description 72
- 238000007790 scraping Methods 0.000 claims description 51
- 239000012535 impurity Substances 0.000 claims description 45
- 230000000694 effects Effects 0.000 claims description 26
- 230000005484 gravity Effects 0.000 claims description 17
- 238000004140 cleaning Methods 0.000 claims description 13
- 239000000835 fiber Substances 0.000 claims description 13
- 238000004062 sedimentation Methods 0.000 claims description 9
- 230000008569 process Effects 0.000 claims description 6
- 238000011084 recovery Methods 0.000 claims description 6
- 239000008394 flocculating agent Substances 0.000 claims description 3
- 239000013049 sediment Substances 0.000 claims description 3
- 230000007306 turnover Effects 0.000 claims description 2
- 239000002245 particle Substances 0.000 abstract description 4
- 239000011148 porous material Substances 0.000 abstract description 3
- 239000010802 sludge Substances 0.000 description 9
- 239000002351 wastewater Substances 0.000 description 5
- 230000000903 blocking effect Effects 0.000 description 4
- 239000000428 dust Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 238000004064 recycling Methods 0.000 description 3
- 239000002023 wood Substances 0.000 description 3
- 238000004537 pulping Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004061 bleaching Methods 0.000 description 1
- 238000010411 cooking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000010902 straw Substances 0.000 description 1
- 239000003440 toxic substance Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/40—Devices for separating or removing fatty or oily substances or similar floating material
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/26—Nature of the water, waste water, sewage or sludge to be treated from the processing of plants or parts thereof
- C02F2103/28—Nature of the water, waste water, sewage or sludge to be treated from the processing of plants or parts thereof from the paper or cellulose industry
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
- C02F2201/004—Seals, connections
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/16—Regeneration of sorbents, filters
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/24—Separation of coarse particles, e.g. by using sieves or screens
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Analytical Chemistry (AREA)
- Filtering Materials (AREA)
- Filtration Of Liquid (AREA)
Abstract
The invention belongs to the technical field of papermaking sewage treatment, in particular to a paper pulp sewage treatment system for a paper mill, which comprises a main body, a motor, a rotating roller, a filter screen and a grid; one side of the main body adjacent to the main body opening is fixedly connected with a motor, a group of rotating rollers are rotatably connected to the position, close to the main body opening, in the main body, and the rotating rollers are obliquely arranged, and the rotating rollers, close to the bottom, in the main body are far away from the main body; through the cooperation between latch jack and the filter screen, the latch jack begins to revolute the pole and rotates, and after the latch jack passed through the scraper blade, the latch jack receives the torsional spring to influence and resets, because the inertia latch jack resets in-process latch jack and is close to the part motion collision filter screen of filter screen for the filter screen is close to the part of main part and produces the shake, thereby shakes off filterable silt particle in the filtration pore, shakes off on the silt particle falls the collecting plate, thereby increases the clean degree of filter screen, and then increases the filtration efficiency of filter screen.
Description
Technical Field
The invention belongs to the technical field of papermaking sewage treatment, and particularly relates to a paper pulp sewage treatment system for a paper mill.
Background
Papermaking wastewater refers to wastewater generated in the pulping and papermaking process. Including pulping and cooking waste liquid, washing waste water, bleaching waste water, paper machine white water and the like. The waste water produced by using straw, wood pulp and the like as paper-making raw materials has complex components, but basically contains a large amount of suspended matters, BOD, COD and partial toxic substances, and belongs to industrial waste water which is difficult to treat. Most of the suspended matters are fine suspended matters such as bark, wood dust, plastics, silt, pulp fibers and the like, so that the suspended matters are separated before entering a water pump and a body treatment system, and a large number of suspended matters are separated by arranging a grid.
The technical scheme of a paper pulp sewage treatment system for a paper mill also appears in the prior art, for example, a Chinese patent with the application number of CN2019200085629 discloses a grating anti-blocking device of sewage treatment equipment, the device comprises an adjusting tank, wherein the top of the adjusting tank is fixedly connected with a grating, the tops of two sides of the adjusting tank are fixedly connected with a garbage storage box, the inner side of the top of the garbage storage box is fixedly connected with a shaft sleeve block, the top of the shaft sleeve block is fixedly connected with a water baffle, the right side of the top of the water baffle is fixedly connected with a driving mechanism, a screw is movably arranged in the shaft sleeve block, the right end of the screw penetrates through the shaft sleeve block and extends to the right side of the shaft sleeve block, a first sprocket is sleeved on the right side of the shaft sleeve block, the surface of the screw is connected with a screw sleeve, the bottom of the screw sleeve is fixedly connected with a scraping plate, the bottom of the scraping plate is contacted with the top of the grating, and the top of the inner side of the garbage storage box is fixedly connected with a collision preventing mechanism; however, the technical scheme is that the first sprocket is driven to rotate by the driving mechanism, the first sprocket drives the screw to rotate, the screw is driven to rotate to drive the threaded sleeve connected with the screw to move left and right, the threaded sleeve drives the scraping plate to move left and right, and the scraping plate can scrape garbage at the top of the grating to the garbage storage boxes at two sides of the grating, so that the garbage accumulated at the top of the grating can be cleaned conveniently and quickly, and the grating is prevented from being blocked.
In view of the above, the present invention provides a pulp sewage treatment system for a paper mill, which solves the above problems.
Disclosure of Invention
In order to overcome the defects in the prior art, and solve the problem that when filtering pulp sewage, suspended matters in the sewage adhere to a grid to cause the grid to be blocked so as to influence the filtering efficiency of the pulp sewage, the invention provides a pulp sewage treatment system for a paper mill.
The technical scheme adopted for solving the technical problems is as follows: the invention relates to a paper pulp sewage treatment system for a paper mill, which comprises a salvaging unit, a recycling unit, a biochemical treatment unit and a sedimentation unit, wherein the salvaging unit salvages muddy sand, scraps and fibers in sewage through a grid salvaging machine, the recycling unit recycles the salvaged fibers through fiber recycling equipment, the biochemical treatment unit biochemically treats the sewage through a biochemical treatment tank, and the sedimentation unit sedimentates and discharges the sewage added with flocculating agents through a sedimentation tank; the fishing unit comprises a grid fishing machine, wherein the grid fishing machine comprises a main body, a motor, a rotating roller, a filter screen and a grid; one side of the main body adjacent to the main body opening is fixedly connected with a motor, a group of rotating rollers are rotatably connected to the position, close to the main body opening, in the main body, the rotating rollers are obliquely arranged, the rotating rollers, close to the bottom, in the main body are far away from the main body, and one end, close to the motor, of each rotating roller is fixedly connected with an output end in the motor through a rotating shaft; the chain wheels are fixedly connected to the positions, close to the inner wall of the main body, of the rotating roller, chains are sleeved on the chain wheels, located on the same side, of the rotating roller, a group of rotating rods are uniformly and rotatably connected between the adjacent chains, and the rotating rods are connected with the chains through torsion springs; a group of fishing blocks are uniformly and fixedly connected to the rotating rod, grids are rotationally connected between adjacent fishing blocks on the rotating rod, and the rotating rod penetrates through the grids; filter screens are sleeved between adjacent chain wheels on the rotating roller, and filter holes are formed in the filter screens; a scraping plate is fixedly connected to the inner wall of one side of the main body, which is opposite to the filter screen, and one end of the scraping plate, which is far away from the inner wall of the main body, is contacted with the grid; and a collecting plate is fixedly connected below the scraping plate.
When the device is used, when paper pulp sewage produced by a paper mill is treated, the sewage is discharged to a salvage ditch, the device is arranged in the salvage ditch, the bottom of the main body of the device is positioned at the bottom of the salvage ditch, and the top of the main body is positioned outside the salvage ditch; when the sewage is salvaged, the grid salvaging machine is started, the motor drives the rotating roller to rotate, the rotating roller drives the chain wheel to rotate, the chain wheel drives the chain to move, the chain drives the rotating rod to move, the rotating rod drives the salvaging block and the grid to move, the sewage flows through the grid salvaging machine, the sewage passes through a gap formed by the salvaging block and the grid, the grid blocks large-volume impurities in the sewage, such as scraps, fibers, saw dust and bark of papermaking materials, the part of the salvaging block, which is far away from the scraping plate, moves from bottom to top along the track of the chain, and the salvaging block drags the impurities out of the sewage and drives the impurities to move, so that the cleaning degree of the sewage is increased; through the cooperation between the fishing block and the filter screen, the fishing block moves to drive the sewage to turn from bottom to top, the silt in the sewage flows along with the sewage to turn, the sewage passes through the rear contact filter screen from the gap formed by the fishing block and the grid, the filter screen filters the silt in the sewage, and the filter effect of the filter screen on the silt in the sewage is improved, so that the filter efficiency of the filter screen is improved, and the excessive silt content flowing into a biochemical treatment tank after the sewage flows into the grid fishing machine is avoided, so that the subsequent biochemical treatment effect of the sewage is influenced; when the impurity in the sewage is carried up by the salvaging block and moves to a position close to the scraping plate along with the salvaging block, the salvaging block is inclined towards the scraping plate, and the impurity on the salvaging block falls onto the scraping plate under the influence of gravity; the salvage block contacts with the scraping plate along with the movement of the chain, the scraping plate scrapes the surface of the salvage block, the cleaning degree of the surface of the salvage block is increased, the salvage block starts to rotate around the rotating rod, when the salvage block passes through the scraping plate, the salvage block is reset under the influence of the torsion spring, as the part of the salvage block, which is close to the filter screen, moves to collide with the filter screen in the resetting process of the inertial salvage block, the part of the filter screen, which is close to the main body, is vibrated, so that the filtered mud and sand in the filter screen are shaken off, the shaken-off mud and sand fall onto the collecting plate, the cleaning degree of the filter screen is increased, the filtering efficiency of the filter screen is increased, the filter screen is prevented from blocking the filter screen when the mud and sand in the filtering sewage is filtered, the filtering effect of the filter screen is reduced, and the subsequent treatment of the salvaged sewage is affected; the staff collects the impurity and the silt on the scraping plate and the collecting plate.
Preferably, the section of the fishing block consists of an arc a, an arc b, an arc c and an arc d, the included angle between the hook formed by the arc a and the arc b and the hook formed by the arc c and the arc d is smaller than 180 degrees, the hook volume formed by the arc a and the arc b is smaller than the hook volume formed by the arc c and the arc d, the arc c is close to the arc b, and the arc d is far away from the arc a.
When the device is used, the shape of the salvage block is arranged, the salvage block moves away from the main body part, the arc b part in the salvage block faces upwards, when the grid blocks impurities outside the grid salvage machine, the connecting part of the arc a and the arc b in the salvage block scrapes the impurities towards the direction close to the grid, when the impurities leave sewage, the impurities slide along the curved part of the arc b in the salvage block under the influence of gravity until contacting the grid, the salvage block lifts the impurities along with the movement of the chain, so that the filtering effect on the impurities is improved, the salvage block is prevented from lifting the impurities, the impurities on the salvage block fall into the sewage again along with the vibration of the chain transmission belt, and the salvage efficiency of the salvage block is reduced; because the hooked volume that circular arc a and circular arc b are constituteed is less than the hooked volume that circular arc c and circular arc d are constituteed for when the latch jack receives the torsional spring influence to reset, increase the shake effect that produces behind the impact filter screen surface of the junction part of circular arc c and circular arc d in the latch jack, thereby increase the filter screen and shake the effect that falls with the silt particle in the filtration pore, prevent that the filter screen from blocking the filtration pore when filtering the silt particle in sewage, lead to the filter effect of filter screen to reduce.
Preferably, the aperture of one end of the filter hole close to the fishing block is large, and the aperture of one end of the filter hole far away from the fishing block is small, and the filter hole is perpendicular to the filter screen.
When the filter screen is used, the aperture of one end of the filter screen, which is close to the fishing block, is large, when sewage passes through the contact filter screen from the gap between the fishing block and the grid, the aperture of the part, which is far away from the fishing block, is smaller along with the filter screen, so that the muddy sand stops moving after contacting the small aperture of the filter screen, the muddy sand is blocked in the filter screen, which is close to the fishing block, and the filter screen moves along with the rotating roller until the filter screen moves to a state of inclining towards the scraping plate, part of muddy sand in the filter screen falls under the influence of gravity, the filter screen collides with the filter screen when the fishing block resets, so that the filter screen shakes, the muddy sand in the filter screen shakes off, the filtering effect of the filter screen on the muddy sand in the sewage is increased, the filtering efficiency of the muddy sand in the sewage is increased, the aperture in the filter screen is prevented from being the same, the driving property of the muddy sand in the large volume by the filter screen is reduced, and the muddy sand in the large volume is filtered Kong Zuge outside the filter screen, and the filtering efficiency of the filter screen is affected.
Preferably, the cross section of the grid is pentagonal, and one side of the grid, which is close to the filter screen, is a sharp corner.
When the filter screen is used, when the muddy sand is blocked to be close to the salvaging block part in the filter hole, the filter screen moves along with the rotating roller until the filter hole moves to a state of inclining towards the scraping plate, part of the muddy sand in the filter hole falls under the influence of gravity, because the cross section of the grid is pentagonal, and one side of the grid, which is close to the filter screen, is sharp, when part of the muddy sand in the filter hole falls under the influence of gravity, the muddy sand contacts with the tip part of the grid, the muddy sand passes through a gap between the grid and the salvaging block under the guide effect of the tip part, the muddy sand falls onto the scraping plate or the collecting plate after passing through, the filtering effect of the grid salvaging machine is improved, the muddy sand is prevented from falling from the filter hole to the surface of one side, which is close to the filter screen, of the muddy sand falls into the salvaged and filtered sewage along the surface of the grid under the guide effect, so that the sediment content in the filtered sewage is increased, and the subsequent treatment of the sewage is affected.
Preferably, the scraping plate comprises a first plate and a second plate, the first plate is positioned above the second plate, and the first plate and the second plate are fixedly connected with the inner wall of the main body far away from the rotating roller; the first plate and the second plate are folded plate type.
When the grid salvaging machine is used, the first plate and the second plate are folded plates, after the salvaging block moves to the contact scraping plate, the first plate firstly contacts with the salvaging block, the first plate scrapes the surface of the salvaging block to scrape sludge on the surface of the salvaging block, the scraped sludge slides to the central position along the surface of the first plate, the cleaning degree of the surface of the first plate is increased, and therefore the filtering efficiency of the grid salvaging machine is improved, excessive sludge adhered to the salvaging block and the grid is prevented, gaps between the salvaging block and the grid are blocked, and the filtering efficiency of the grid salvaging machine is reduced; through setting up board and No. two boards, board is scraped the latch jack and is moved the back, arc a and arc b part rotate to between the adjacent grid in the latch jack, because the hook that arc a and arc b formed and the hook that arc c and arc d formed between the contained angle be less than 180 degrees, latch jack arc c and arc d part stretch out the grid surface this moment, no. two boards are scraped and are moved latch jack arc c and arc d part, the clean degree of latch jack is increased step by step, latch jack arc c and arc d part atress make latch jack continue to rotate, until the latch jack is through No. two boards, the torsional spring drives the latch jack and resets, the dynamics that the impact filter screen of increase latch jack was, thereby increase the shake efficiency of filter screen, and then increase the clean degree of filter screen.
Preferably, one end of the scraping plate, which is close to the salvaging block, is in a rake shape, and the surface of the scraping plate is smooth.
When the scraper blade is used, one end, close to the salvaging block, of the scraper blade is in a rake shape, the scraping area of the first plate on the salvaging block is increased, so that the cleaning degree of the salvaging block is increased, the filtering efficiency of the grid salvaging machine is further increased, too much mud adhered to the salvaging block and the grid is prevented, the gap between the salvaging block and the grid is blocked, and the filtering efficiency of the grid salvaging machine is reduced; because the scraper blade is close to the one end of latch jack and is the rake form for the rotation angle of arc a and the arc b part in the latch jack is increased when scraping arc a and the arc b part in the latch jack to the board No. one, thereby the rotation angle of arc c and the arc d part in the latch jack is scraped to the board No. two, thereby increases the dynamics that the latch jack collided the filter screen, and then increases the filter effect of grid latch jack.
The beneficial effects of the invention are as follows:
1. according to the paper pulp sewage treatment system for the paper mill, the fishing block starts to rotate around the rotating rod through the cooperation between the fishing block and the filter screen, and when the fishing block passes through the scraping plate, the fishing block is reset under the influence of the torsion spring, and the part, close to the filter screen, of the fishing block moves to collide with the filter screen in the resetting process of the inertia fishing block, so that the part, close to the main body, of the filter screen is dithered, filtered silt in the filter hole is dithered off, and the dithered silt falls onto the collecting plate, so that the cleaning degree of the filter screen is increased, and the filtering efficiency of the filter screen is further increased.
2. According to the paper pulp sewage treatment system for the paper mill, the shape of the fishing block is arranged, when the fishing block moves away from the main body part, the arc b part in the fishing block faces upwards, and when the grid blocks impurities outside the grid fishing machine, the connection part of the arc a and the arc b in the fishing block scrapes the impurities towards the direction close to the grid, when the impurities leave sewage, the impurities slide along the bent part of the arc b in the fishing block under the influence of gravity until contacting the grid, and the fishing block lifts the impurities along with the movement of the chain, so that the filtering effect on the impurities is improved.
Drawings
The invention is further described below with reference to the accompanying drawings.
FIG. 1 is a perspective view of the present invention;
FIG. 2 is a schematic diagram of the structure of the present invention;
FIG. 3 is an enlarged view of a portion of FIG. 2 at A;
FIG. 4 is a perspective view of a screed according to the present invention;
in the figure: the device comprises a main body 1, a motor 11, a rotating roller 12, a chain wheel 13, a chain 14, a rotating rod 15, a fishing block 16, a grid 17, a filter screen 2, a filter hole 21, a scraping plate 3, a first plate 31, a second plate 32 and a collecting plate 4.
Detailed Description
The invention is further described in connection with the following detailed description in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the invention easy to understand.
As shown in fig. 1 to 4, the system for treating pulp sewage for a paper mill according to the present invention comprises a salvaging unit, a recovery unit, a biochemical treatment unit and a sedimentation unit, wherein the salvaging unit salvages muddy sand, scraps and fibers in sewage through a grid salvaging machine, the recovery unit recovers the salvaged fibers through a fiber recovery device, the biochemical treatment unit biochemically treats the sewage through a biochemical treatment tank, and the sedimentation unit sediments and discharges the sewage added with a flocculating agent through a sedimentation tank; the fishing unit comprises a grid fishing machine, wherein the grid fishing machine comprises a main body 1, a motor 11, a rotating roller 12, a filter screen 2 and a grid 17; a motor 11 is fixedly connected to one side of the main body 1 adjacent to the opening of the main body 1, a group of rotating rollers 12 are rotatably connected to the position, close to the opening of the main body 1, in the main body 1, of the rotating rollers 12, close to the bottom, in the main body 1 are arranged in an inclined mode, the rotating rollers 12, close to the bottom, are far away from the main body 1, and one end, close to the motor 11, of each rotating roller 12 is fixedly connected with an output end in the motor 11 through a rotating shaft; the positions, close to the inner wall of the main body 1, of the rotating rollers 12 are fixedly connected with chain wheels 13, chains 14 are sleeved on the chain wheels 13 positioned on the same side in the rotating rollers 12, a group of rotating rods 15 are uniformly and rotatably connected between the adjacent chains 14, and the rotating rods 15 are connected with the chains 14 through torsion springs; a group of fishing blocks 16 are uniformly and fixedly connected to the rotating rod 15, grids 17 are rotatably connected between adjacent fishing blocks 16 on the rotating rod 15, and the rotating rod 15 penetrates through the grids 17; a filter screen 2 is sleeved between adjacent chain wheels 13 on the rotating roller 12, and a filter hole 21 is formed in the filter screen 2; the inner wall of one side of the main body 1 opposite to the filter screen 2 is fixedly connected with a scraping plate 3, and one end of the scraping plate 3 away from the inner wall of the main body 1 is contacted with a grid 17; and a collecting plate 4 is fixedly connected below the scraping plate 3.
When the device is used, when paper pulp sewage produced by a paper mill is treated, the sewage is discharged to a salvage ditch, the device is arranged in the salvage ditch, the bottom of the main body 1 of the device is positioned at the bottom of the salvage ditch, and the top of the main body 1 is positioned outside the salvage ditch; when the sewage is salvaged, the grid salvaging machine is started, the motor 11 drives the rotating roller 12 to rotate, the rotating roller 12 drives the chain wheel 13 to rotate, the chain wheel 13 drives the chain 14 to move, the chain 14 drives the rotating rod 15 to move, the rotating rod 15 drives the salvaging block 16 and the grid 17 to move, the sewage flows through the grid salvaging machine, the sewage passes through a gap formed by the salvaging block 16 and the grid 17, the grid 17 blocks large-volume impurities in the sewage, such as scraps, fibers, wood dust and barks of paper making materials, the part of the salvaging block 16 far away from the scraping plate 3 moves from bottom to top along the track of the chain 14, and the salvaging block 16 drags the impurities from the sewage and drives the impurities to move, so that the cleaning degree of the sewage is increased; through the cooperation between the fishing block 16 and the filter screen 2, the fishing block 16 moves to drive sewage to turn from bottom to top, mud and sand in the sewage flow along with the sewage to turn, the sewage passes through the rear contact filter screen 2 from the gap formed by the fishing block 16 and the grid 17, the filter screen 2 filters the mud and sand in the sewage, and the filtering effect of the filter screen 2 on the mud and sand in the sewage is improved, so that the filtering efficiency of the filter screen 2 is improved, and the phenomenon that the excessive mud and sand content flowing into a biochemical treatment tank after the sewage flows into the grid fishing machine influences the subsequent biochemical treatment effect of the sewage is avoided; when the impurities in the sewage are carried up by the fisher block 16 and move to a position close to the scraper 3 along with the fisher block 16, the fisher block 16 is inclined towards the scraper 3, and the impurities on the fisher block 16 drop onto the scraper 3 under the influence of gravity; the salvage block 16 moves along with the chain 14 to contact the scraper blade 3, the scraper blade 3 scrapes the surface of the salvage block 16, the cleaning degree of the surface of the salvage block 16 is increased, the salvage block 16 starts to rotate around the rotating rod 15, when the salvage block 16 passes through the scraper blade 3, the salvage block 16 is reset under the influence of the torsion spring, as the part of the salvage block 16, which is close to the filter screen 2, moves to collide with the filter screen 2 in the resetting process of the inertial salvage block 16, the part of the filter screen 2, which is close to the main body 1, is vibrated, so that the muddy sand filtered in the filter holes 21 is shaken off, and the muddy sand after shaking falls onto the collecting plate 4, so that the cleaning degree of the filter screen 2 is increased, the filtering efficiency of the filter screen 2 is further increased, the muddy sand is prevented from blocking the filter holes 21 when the muddy sand in the filtered sewage, the filtering effect of the filter screen 2 is reduced, and the follow-up treatment of the sewage after salvage is affected; the staff collects the foreign matters and the muddy sand on the scraping plate 3 and the collecting plate 4.
As one embodiment of the invention, the cross section of the fishing block 16 is composed of an arc a, an arc b, an arc c and an arc d, the included angle between the hook composed of the arc a and the arc b and the hook composed of the arc c and the arc d is smaller than 180 degrees, the hook volume composed of the arc a and the arc b is smaller than the hook volume composed of the arc c and the arc d, the arc c is close to the arc b, and the arc d is far away from the arc a.
When the device is used, through the shape of the salvage block 16, when the salvage block 16 moves away from the main body 1, the arc b in the salvage block 16 is partially upward, and the grid 17 blocks impurities outside the grid salvage machine, the connection part of the arc a and the arc b in the salvage block 16 scrapes the impurities towards the direction close to the grid 17, when the impurities leave sewage, the impurities slide along the curved part of the arc b in the salvage block 16 under the influence of gravity until contacting the grid 17, the salvage block 16 lifts the impurities along with the movement of the chain 14, so that the filtering effect on the impurities is improved, the salvage block 16 is prevented from dragging the impurities, and the impurities on the salvage block 16 fall into the sewage again due to vibration along with the vibration of the chain drive, so that the salvage efficiency of the salvage block 16 is reduced; because the hooked volume formed by the arc a and the arc b is smaller than the hooked volume formed by the arc c and the arc d, when the latch jack 16 is reset under the influence of the torsion spring, the shaking effect generated after the connection part of the arc c and the arc d in the latch jack 16 collides with the surface of the filter screen 2 is increased, so that the shaking effect of the filter screen 2 on the sand in the filter holes 21 is increased, the filter screen 2 is prevented from blocking the filter holes 21 when filtering the sand in sewage, and the filtering effect of the filter screen 2 is reduced.
As an embodiment of the present invention, the hole diameter of the end of the filter hole 21 close to the fishing block 16 is large, and the hole diameter of the end of the filter hole 21 far from the fishing block 16 is small, and the filter hole 21 is perpendicular to the filter screen 2.
When the filter screen is used, the aperture of one end of the filter hole 21 close to the fishing block 16 is large, when sewage passes through the contact filter hole 21 from the gap between the fishing block 16 and the grid 17, the smaller the aperture of the part of the filter hole 21 away from the fishing block 16 is, so that the movement of the part of the filter hole 21 with small aperture is stopped after the part of the filter hole 21 with small aperture is contacted with the mud, the mud and sand are blocked in the filter hole 21 to be close to the fishing block 16, the filter screen 2 moves along with the rotating roller 12 until the filter hole 21 moves to a state of inclining towards the scraping plate 3, part of mud and sand in the filter hole 21 falls under the influence of gravity, the filter screen 2 is impacted when the fishing block 16 resets, the filter screen 2 is enabled to shake, the mud and sand in the filter hole 21 is shaken off by the shake of the filter screen 2, the filtering effect of the filter screen 2 on the mud and sand in the sewage is increased, the filtering efficiency of the filter screen 2 on the mud and sand in the sewage is prevented from being filtered by the filter screen 2, the aperture in the filter hole 21 is the same, the mud and sand with large volume of the filter hole 21 is blocked outside the filter screen 2, and the filtering efficiency of the part of the mud and sand is affected 2.
As an embodiment of the present invention, the cross section of the grid 17 is pentagonal, and a side of the grid 17 near the filter screen 2 is a sharp corner.
When the filter screen 2 is used, when the muddy sand is blocked in the filter hole 21 and is close to the salvage block 16, the filter screen 2 moves along with the rotating roller 12 until the filter hole 21 moves to a state of inclining towards the scraping plate 3, part of the muddy sand in the filter hole 21 falls under the influence of gravity, as the cross section of the grid 17 is pentagonal and one side of the grid 17 close to the filter screen 2 is sharp, when part of the muddy sand in the filter hole 21 falls under the influence of gravity, the muddy sand contacts with the tip part of the grid 17, so that the muddy sand passes through a gap between the grid 17 and the salvage block 16 under the guiding action of the tip part, the muddy sand passes through and falls onto the scraping plate 3 or the collecting plate 4, the filtering effect of the grid salvage machine is increased, the muddy sand is prevented from falling from the filter hole 21 to one side surface of the grid 17 close to the filter screen 2 under the guiding action, the muddy sand rolls down to salvaged sewage along one side surface of the grid 17 close to the filter screen 2, the muddy sand content in the salvaged sewage is increased, and the sewage is influenced after the subsequent treatment of the sewage.
As an embodiment of the present invention, the scraping plate 3 includes a first plate 31 and a second plate 32, where the first plate 31 is located above the second plate 32, and the first plate 31 and the second plate 32 are fixedly connected to the inner wall of the main body 1 away from the rotating roller 12; the first plate 31 and the second plate 32 are both folded plates.
When the grid salvage machine is used, the first plate 31 and the second plate 32 are folded plates, after the salvage block 16 moves to the contact scraper 3, the first plate 31 firstly contacts with the salvage block 16, the first plate 31 scrapes the surface of the salvage block 16 to scrape sludge on the surface of the salvage block 16, the scraped sludge slides to the central position along the surface of the first plate 31, the cleaning degree of the surface of the first plate 31 is increased, so that the filtering efficiency of the grid salvage machine is increased, excessive sludge adhered on the salvage block 16 and the grid 17 is prevented, a gap between the salvage block 16 and the grid 17 is blocked, and the filtering efficiency of the grid salvage machine is reduced; through setting up board 31 and board 32 No. two, board 31 scrapes back with the latch jack 16, arc a and arc b part rotate to between the adjacent grid 17 in the latch jack 16, because the hook that arc a and arc b formed and the hook that arc c and arc d formed between the contained angle be less than 180 degrees, latch jack 16 arc c and arc d part stretch out the grid 17 surface this moment, board 32 scrapes latch jack 16 arc c and arc d part, increase the clean degree of latch jack 16 step by step, latch jack 16 arc c and arc d part atress make latch jack 16 continue to rotate, until latch jack 16 passes board 32 No. two, the torsional spring drives latch jack 16 and resets, increase the dynamics that latch jack 16 collided filter screen 2, thereby increase the shake efficiency of filter screen 2, and then increase the clean degree of filter hole 21.
As an embodiment of the present invention, the end of the scraper 3 near the fishing block 16 is in a rake shape, and the surface of the scraper 3 is smooth.
When the scraper 3 is used, one end, close to the salvaging block 16, of the scraper 3 is in a rake shape, the scraping area of the first plate 31 on the salvaging block 16 is increased, so that the cleaning degree of the salvaging block 16 is increased, the filtering efficiency of the grid salvaging machine is further increased, excessive sludge adhered to the salvaging block 16 and the grid 17 is prevented, a gap between the salvaging block 16 and the grid 17 is blocked, and the filtering efficiency of the grid salvaging machine is reduced; because the scraper 3 is near the one end of the latch jack 16 and is in the shape of a rake, when the first plate 31 scrapes the arc a and the arc b of the latch jack 16, the rotation angles of the arc a and the arc b of the latch jack 16 are increased, so that the rotation angles of the arc c and the arc d of the latch jack 16 scraped by the second plate 32 are increased, the force of the latch jack 16 colliding with the filter screen 2 is increased, and the filtering effect of the grid latch jack is further increased.
The specific working procedure is as follows:
when treating the paper pulp sewage produced by a paper mill, discharging the sewage to a salvaging ditch; when the sewage is salvaged, the grid salvaging machine is started, the motor 11 drives the rotating roller 12 to rotate, the rotating roller 12 drives the chain wheel 13 to rotate, the chain wheel 13 drives the chain 14 to move, the chain 14 drives the rotary rod 15 to move, the rotary rod 15 drives the salvaging block 16 and the grid 17 to move, the sewage flows through the grid salvaging machine, the sewage passes through a gap formed by the salvaging block 16 and the grid 17, the grid 17 blocks large-volume impurities in the sewage, such as scraps, fibers, wood dust and barks of papermaking materials, the part of the salvaging block 16 far away from the scraping plate 3 moves from bottom to top along the track of the chain 14, and the salvaging block 16 drags the impurities from the sewage and drives the impurities to move, so that the cleaning degree of the sewage is increased; through the cooperation between the fishing block 16 and the filter screen 2, the fishing block 16 moves to drive sewage to turn from bottom to top, mud and sand in the sewage turn over along with the sewage, the sewage passes through a gap formed by the fishing block 16 and the grid 17 and then contacts the filter screen 2, and the filter screen 2 filters the mud and sand in the sewage; when the impurities in the sewage are carried up by the fisher block 16 and move to a position close to the scraper 3 along with the fisher block 16, the fisher block 16 is inclined towards the scraper 3, and the impurities on the fisher block 16 drop onto the scraper 3 under the influence of gravity; the salvage block 16 moves along with the chain 14 to contact the scraper 3, the scraper 3 scrapes the surface of the salvage block 16, the salvage block 16 starts to rotate around the rotating rod 15, when the salvage block 16 passes through the scraper 3, the salvage block 16 is reset under the influence of the torsion spring, and as the part of the salvage block 16, which is close to the filter screen 2, moves to collide with the filter screen 2 in the resetting process of the inertial salvage block 16, the part of the filter screen 2, which is close to the main body 1, is vibrated, so that the muddy sand filtered in the filter holes 21 is shaken off, and the muddy sand after shaking falls onto the collecting plate 4; when the salvage block 16 moves away from the main body 1, the arc b in the salvage block 16 is upward, and the grid 17 blocks impurities outside the grid salvage machine, the connecting part of the arc a and the arc b in the salvage block 16 scrapes the impurities in the direction close to the grid 17, and when the impurities leave sewage, the impurities slide along the curved part of the arc b in the salvage block 16 under the influence of gravity until contacting the grid 17, and the salvage block 16 supports the impurities along with the movement of the chain 14; when sewage passes through the contact filter hole 21 from the gap between the fishing block 16 and the grid 17, as the part of the filter hole 21, which is far away from the fishing block 16, is smaller in aperture, the movement of the mud and sand is stopped after the mud and sand contact with the part of the filter hole 21, which is smaller in aperture, the mud and sand are blocked in the part of the filter hole 21, which is close to the fishing block 16, the filter screen 2 moves along with the rotating roller 12 until the filter hole 21 moves to a state of obliquely facing the scraping plate 3, part of the mud and sand in the filter hole 21 falls under the influence of gravity, the filter screen 2 is collided when the fishing block 16 is reset, the filter screen 2 shakes, and the mud and sand in the filter hole 21 is shaken off by the shake of the filter screen 2; when the muddy sand is blocked in the filter hole 21 and approaches the salvaging block 16, the filter screen 2 moves along with the rotating roller 12 until the filter hole 21 moves to a state of inclining towards the scraping plate 3, part of the muddy sand in the filter hole 21 falls under the influence of gravity, and when part of the muddy sand in the filter hole 21 falls under the influence of gravity, the muddy sand contacts with the tip end part of the grid 17, so that the muddy sand passes through a gap between the grid 17 and the salvaging block 16 under the guiding action of the tip end part, and the muddy sand falls onto the scraping plate 3 or the collecting plate 4 after passing through; after the salvage block 16 moves to contact with the scraping plate 3, the first plate 31 firstly contacts with the salvage block 16, the first plate 31 scrapes the surface of the salvage block 16, sludge on the surface of the salvage block 16 is scraped, and the scraped sludge slides to a central position along the surface of the first plate 31; through setting up the scraper blade 3 and being close to the one end of latch jack 16 and being the rake form for the rotation angle of arc a and arc b part in the latch jack 16 is increased when scraping arc a and arc b part in the latch jack 16 to the board 31, thereby the rotation angle that the arc c and arc d part in the latch jack 16 was scraped to the board 32 No. two increases, thereby increases the dynamics that latch jack 16 collided filter screen 2 was, and then increases the filter effect of grid latch jack.
The front, rear, left, right, up and down are all based on fig. 1 in the drawings of the specification, the face of the device facing the observer is defined as front, the left side of the observer is defined as left, and so on, according to the viewing angle of the person.
In the description of the present invention, it should be understood that the terms "center," "longitudinal," "lateral," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present invention and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the scope of the present invention.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (3)
1. The system comprises a salvaging unit, a recovery unit, a biochemical treatment unit and a sedimentation unit, wherein the salvaging unit salvages mud sand, scraps and fibers in sewage through a grid salvaging machine, the recovery unit recovers the salvaged fibers through fiber recovery equipment, the biochemical treatment unit carries out biochemical treatment on the sewage through a biochemical treatment tank, and the sedimentation unit sediments and discharges the sewage added with flocculating agents through a sedimentation tank; the method is characterized in that: the fishing unit comprises a grid fishing machine, wherein the grid fishing machine comprises a main body (1), a motor (11), a rotating roller (12), a filter screen (2) and a grid (17); one side of the opening of the main body (1) adjacent to the main body (1) is fixedly connected with a motor (11), a group of rotating rollers (12) are rotatably connected to the position, close to the opening of the main body (1), in the main body (1), of the rotating rollers (12) close to the bottom of the main body (1) is obliquely arranged, the rotating rollers (12) close to the bottom of the main body (1) are far away from the main body (1), and one end, close to the motor (11), of the rotating rollers (12) is fixedly connected with an output end in the motor (11) through a rotating shaft; sprocket wheels (13) are fixedly connected to positions, close to the inner wall of the main body (1), of the rotating roller (12), chains (14) are sleeved on the sprocket wheels (13) located on the same side in the rotating roller (12), a group of rotating rods (15) are uniformly and rotatably connected between adjacent chains (14), and the rotating rods (15) are connected with the chains (14) through torsion springs; a group of fishing blocks (16) are uniformly and fixedly connected to the rotating rod (15), grids (17) are rotationally connected between adjacent fishing blocks (16) on the rotating rod (15), and the rotating rod (15) penetrates through the grids (17); a filter screen (2) is sleeved between adjacent chain wheels (13) on the rotating roller (12), and a filter hole (21) is formed in the filter screen (2); the inner wall of one side of the main body (1) opposite to the filter screen (2) is fixedly connected with a scraping plate (3), and one end of the scraping plate (3) far away from the inner wall of the main body (1) is contacted with a grid (17); a collecting plate (4) is fixedly connected below the scraping plate (3);
the section of the fishing block (16) consists of an arc a, an arc b, an arc c and an arc d, the included angle between the hook formed by the arc a and the arc b and the hook formed by the arc c and the arc d is smaller than 180 degrees, the hook volume formed by the arc a and the arc b is smaller than the hook volume formed by the arc c and the arc d, the arc c is close to the arc b, and the arc d is far away from the arc a;
the aperture of one end of the filter hole (21) close to the fishing block (16) is large, the aperture of one end of the filter hole (21) far away from the fishing block (16) is small, and the filter hole (21) is perpendicular to the filter screen (2);
one end of the scraping plate (3) close to the fishing block (16) is in a rake shape, and the surface of the scraping plate (3) is smooth;
through the cooperation between the fishing block (16) and the filter screen (2), the fishing block (16) moves to drive sewage to turn from bottom to top, mud and sand in the sewage turn over along with the sewage, the sewage passes through the rear contact filter screen (2) from a gap formed by the fishing block (16) and the grid (17), the filter screen (2) filters the mud and sand in the sewage, and the condition that the mud and sand content in a biochemical treatment tank is excessive after the sewage flows into the grid fishing machine and affects the subsequent biochemical treatment effect of the sewage is avoided; when the impurities in the sewage are carried up by the salvaging block (16) and move to a position close to the scraping plate (3) along with the salvaging block (16), the salvaging block (16) is inclined towards the scraping plate (3), and the impurities on the salvaging block (16) fall onto the scraping plate (3) under the influence of gravity; the salvage block (16) moves along with the chain (14) to contact with the scraper blade (3), the scraper blade (3) scrapes the surface of the salvage block (16), the cleaning degree of the surface of the salvage block (16) is increased, the salvage block (16) starts to rotate around the rotating rod (15), when the salvage block (16) passes through the scraper blade (3), the salvage block (16) is reset under the influence of the torsion spring, and as the part of the salvage block (16) close to the filter screen (2) moves to collide with the filter screen (2) in the resetting process of the inertial salvage block (16), the part of the filter screen (2) close to the main body (1) is vibrated, so that the filtered muddy sand in the filter hole (21) is shaken off, the muddy sand after shaking falls onto the collecting plate (4), and the filter screen (21) is prevented from being blocked when the muddy sand in the filtering sewage;
through setting up the one end aperture that filter hole (21) is close to latch jack (16) big, when sewage passes contact filter hole (21) from the space between latch jack (16) and grid (17), along with the part aperture that filter hole (21) were kept away from latch jack (16) is less more for stop the motion behind the part that mud sand contact filter hole (21) aperture is little, mud sand is blocked in filter hole (21) and is close to latch jack (16) part.
2. A paper mill pulp sewage treatment system according to claim 1, wherein: the cross section of the grid (17) is pentagonal, and one side of the grid (17) close to the filter screen (2) is a sharp corner.
3. A paper mill pulp sewage treatment system according to claim 2, wherein: the scraping plate (3) comprises a first plate (31) and a second plate (32), the first plate (31) is positioned above the second plate (32), and the first plate (31) and the second plate (32) are fixedly connected with the inner wall of the main body (1) far away from the rotating roller (12); the first plate (31) and the second plate (32) are folded plates.
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| CN209291989U (en) * | 2018-11-02 | 2019-08-23 | 南京奥伯尔环保设备有限公司 | Turn round rake type bar screen machine |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6942789B2 (en) * | 2002-02-08 | 2005-09-13 | Usfilter Corporation | Filter screen assembly |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102553329A (en) * | 2012-01-22 | 2012-07-11 | 江苏一环集团有限公司 | Rotary fine screen for water treatment and application of rotary fine screen to water treatment |
| CN104028029A (en) * | 2013-03-10 | 2014-09-10 | 江苏天雨环保集团有限公司 | Inward-feeding-type rotary filter screen grille cleaner |
| CN204690711U (en) * | 2015-05-07 | 2015-10-07 | 广西壮族自治区环境保护科学研究院 | Machinery rotation formula trash rake |
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| CN209291989U (en) * | 2018-11-02 | 2019-08-23 | 南京奥伯尔环保设备有限公司 | Turn round rake type bar screen machine |
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