CN110590049A - Magnetic separation equipment and magnetic coagulation sedimentation tank sewage treatment system - Google Patents
Magnetic separation equipment and magnetic coagulation sedimentation tank sewage treatment system Download PDFInfo
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- CN110590049A CN110590049A CN201910911424.6A CN201910911424A CN110590049A CN 110590049 A CN110590049 A CN 110590049A CN 201910911424 A CN201910911424 A CN 201910911424A CN 110590049 A CN110590049 A CN 110590049A
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- magnetic
- magnetic separation
- magnetic powder
- flow
- water
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- 238000007885 magnetic separation Methods 0.000 title claims abstract description 59
- 239000010865 sewage Substances 0.000 title claims abstract description 39
- 238000004062 sedimentation Methods 0.000 title claims abstract description 30
- 238000005345 coagulation Methods 0.000 title claims abstract description 24
- 230000015271 coagulation Effects 0.000 title claims abstract description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 91
- 239000006247 magnetic powder Substances 0.000 claims abstract description 76
- 238000011084 recovery Methods 0.000 claims abstract description 41
- 238000004064 recycling Methods 0.000 claims abstract description 22
- 239000010802 sludge Substances 0.000 claims description 21
- 238000002156 mixing Methods 0.000 claims description 18
- 230000001105 regulatory effect Effects 0.000 claims description 15
- 230000001112 coagulating effect Effects 0.000 claims description 12
- 239000002245 particle Substances 0.000 claims description 10
- 238000005189 flocculation Methods 0.000 claims description 7
- 230000016615 flocculation Effects 0.000 claims description 7
- 239000003638 chemical reducing agent Substances 0.000 claims description 6
- 238000007790 scraping Methods 0.000 claims description 6
- 238000009833 condensation Methods 0.000 claims description 3
- 230000005494 condensation Effects 0.000 claims description 3
- 238000011010 flushing procedure Methods 0.000 claims description 2
- 230000001276 controlling effect Effects 0.000 claims 2
- 230000003750 conditioning effect Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 10
- 230000005484 gravity Effects 0.000 abstract description 7
- 230000005389 magnetism Effects 0.000 abstract description 5
- 238000010521 absorption reaction Methods 0.000 abstract 1
- 229910001172 neodymium magnet Inorganic materials 0.000 description 7
- 238000005406 washing Methods 0.000 description 6
- QJVKUMXDEUEQLH-UHFFFAOYSA-N [B].[Fe].[Nd] Chemical compound [B].[Fe].[Nd] QJVKUMXDEUEQLH-UHFFFAOYSA-N 0.000 description 5
- 239000006249 magnetic particle Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000003651 drinking water Substances 0.000 description 1
- 235000020188 drinking water Nutrition 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- SZVJSHCCFOBDDC-UHFFFAOYSA-N ferrosoferric oxide Chemical group O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 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
- C02F1/48—Treatment of water, waste water, or sewage with magnetic or electric fields
- C02F1/488—Treatment of water, waste water, or sewage with magnetic or electric fields for separation of magnetic materials, e.g. magnetic flocculation
-
- 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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
-
- 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
- C02F2001/007—Processes including a sedimentation step
-
- 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
- C02F2201/48—Devices for applying magnetic or electric fields
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)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The application discloses magnetic separation equipment and magnetic coagulation sedimentation tank sewage treatment system. Magnetic separation equipment includes the frame, rotates the cylinder, drive structure, runner, water inlet, delivery port, magnetism inhale the structure and retrieve the structure, and drive structure control it is rotatory to rotate the cylinder, the runner sets up rotate the cylinder outside, the water inlet intercommunication the one end of runner, the delivery port intercommunication the other end of runner, magnetism inhale the structure and encircle rotate the inboard setting of cylinder, with the runner corresponds the setting, retrieve the structure and be located the top of delivery port for retrieve the absorption rotate the magnetic on the cylinder. Magnetic powder in the magnetic separation equipment can fall into the recovery structure under the action of gravity; in addition, because water flow is required to sequentially pass through the flow channel, most of the magnetic powder in the sewage can be separated by the magnetic separation equipment and then recovered, and therefore the magnetic powder recycling device has the effect of efficiently recycling the magnetic powder in the sewage.
Description
Technical Field
The application relates to sewage cleaning equipment, in particular to a magnetic separation device and a magnetic coagulation sedimentation tank sewage treatment system.
Background
The high-efficiency magnetic coagulation sedimentation technology is widely applied to the fields of drinking water production, sewage treatment, industrial wastewater treatment, sludge treatment and the like, and is characterized in that large floccules are formed in a reaction zone by refluxing sludge in a conventional coagulation sedimentation process, adding medicines and adding magnetic powder so as to enhance the coagulation and flocculation effects, so that the generated floccules are higher in density and firmer, and the purpose of high-speed sedimentation is achieved.
The main component of the magnetic powder is ferroferric oxide which is a substance with high hardness, equipment is easily abraded and is entrained by excess sludge in a sewage cleaning system, and the existing magnetic powder recovery efficiency is low, so that the problem that how to efficiently recover the magnetic powder in sewage is needed to be solved urgently is solved.
Disclosure of Invention
The utility model aims at providing a magnetic separation equipment and magnetism coagulating sedimentation pond sewage treatment system can high-efficiently retrieve the magnetic that magnetism coagulating sedimentation pond excess sludge smugglied secretly.
The application discloses magnetic separation equipment, which comprises a rack, a rotary roller, a driving structure, a flow passage, a water inlet, a water outlet, a magnetic attraction structure and a recovery structure, wherein the rotary roller is arranged on the rack; the driving structure is arranged on the rack, is connected with the rotating roller and controls the rotating roller to rotate; the runner is arranged outside the rotary drum, surrounds the bottom of the rotary drum and is fixed on the rack; the water inlet is communicated with one end of the flow channel, so that water flow can enter the flow channel; the water outlet is communicated with the other end of the flow channel, and water entering the flow channel is discharged from the water outlet; the magnetic attraction structure is arranged around the inner side of the rotary roller and fixed on the rack; the recovery structure is arranged on the outer side of the rotary roller and fixed on the rack, and is positioned above the water outlet and used for recovering magnetic powder adsorbed on the outer surface of the rotary roller; the magnetic attraction structure is arc-shaped and is arranged corresponding to the flow channel, one end of the magnetic attraction structure is positioned above the vertical direction of the rotary roller, and the other end of the magnetic attraction structure is positioned below the recovery structure.
Optionally, the driving structure includes a variable frequency speed regulating motor and a speed reducer, the variable frequency speed regulating motor controls the rotation speed of the rotating drum, and the speed reducer drives the rotating drum; the water inlet is provided with an electromagnetic meter used for detecting the flow of water flow at the water inlet; the electromagnetic meter and the variable-frequency speed-regulating motor are controlled in a centralized manner, and the variable-frequency speed-regulating motor can adjust the rotating speed of the rotating roller according to data detected by the electromagnetic meter.
Optionally, the magnetic separation equipment includes the regulation weir plate, the regulation weir plate is fixed the inner wall of water inlet, the direction subtend setting of rivers in regulation weir plate and the water inlet.
Optionally, the rotating drum rotates in a direction opposite to the direction of the water flow in the flow channel.
Optionally, the recovery structure comprises a scraper, an adjusting structure and a recovery hopper; one end of the scraper is fixed on the rack, and the other end of the scraper is attached to the outer surface of the rotary drum; the adjusting structure is connected with the scraping plate and used for adjusting the distance between the scraping plate and the rotary drum; the recycling hopper is fixed on the rack and located below the scraper and used for containing magnetic powder scraped off by the scraper on the rotary drum.
Optionally, the magnetic separation equipment comprises a washing device, and the washing device is fixed on the rack and arranged above the scraper.
Optionally, the magnetic separation device comprises a turbulent plate, and the turbulent plate is arranged inside the flow channel and is perpendicular to the water flow direction.
Optionally, the turbulent flow plate includes a top plate and a side plate, two ends of the side plate in the length direction are fixed to two sides of the flow channel far away from the magnetic attraction structure, the other end of the side plate in the width direction is fixed to the top plate, and the side plate and the top plate are arranged vertically; one end of the side plate in the width direction points to the axis of the rotary drum.
Optionally, the magnetic separation device further includes an evacuation pipe and a control switch, the evacuation pipe is connected to the control switch, and the control switch controls the evacuation pipe to be opened and closed; one end of the emptying pipe is communicated with the bottom of the flow passage, and the other end of the emptying pipe is communicated with the water outlet.
The application also discloses a magnetic coagulation sedimentation tank sewage treatment system, which comprises a coagulation tank, a mixing tank, a flocculation tank, a sedimentation tank and the magnetic separation equipment which are sequentially communicated, wherein a water inlet of the magnetic separation equipment is communicated with the residual sludge pipe of the sedimentation tank and is used for separating magnetic powder in the residual sludge in the sedimentation tank, the separated magnetic powder flows back to the mixing tank from a recovery hopper in the magnetic separation equipment for recycling, and sludge without the magnetic powder flows to the residual sludge tank from a water outlet; the coagulating basin is used for coagulating colloidal particles in the sewage into flocs, the mixing tank is used for uniformly mixing the flocs obtained through the coagulation basin treatment with magnetic powder and backflow sludge recovered by a magnetic separation device to form stable flocs taking the magnetic powder as a condensation nucleus, the coagulating basin is used for coagulating the stable flocs obtained through the mixing tank treatment into larger floc particles, and the sedimentation tank is used for settling the larger floc particles obtained through the flocculation basin treatment.
The magnetic powder of water flow in a flow channel is adsorbed on the outer surface of the rotary roller through the magnetic attraction structure, then the rotary roller is rotated to rotate the magnetic powder adsorbed on the surface of the rotary roller to the corresponding position of the recovery structure, and the rotary roller at the recovery structure is not provided with the magnetic attraction structure, so that the magnetic powder can fall into the recovery structure under the action of gravity; in addition, sewage is required to sequentially pass through the flow channel, and most of magnetic powder in the sewage is separated by the magnetic separation equipment and then is recycled, so that the sewage magnetic powder recycling device has the effect of efficiently recycling the magnetic powder in the sewage.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the application, are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the principles of the application. It is obvious that the drawings in the following description are only some embodiments of the application, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:
FIG. 1 is a schematic view of a magnetic coagulation sedimentation tank sewage treatment system according to an embodiment of the present application;
FIG. 2 is a schematic front view of a magnetic separation apparatus of another embodiment of the present application;
FIG. 3 is a right side schematic view of a magnetic separation apparatus of another embodiment of the present application;
FIG. 4 is a schematic top view of a magnetic separation apparatus according to another embodiment of the present application;
fig. 5 is a schematic view at a drive configuration of another embodiment of the present application.
FIG. 6 is a schematic view of a water intake in another embodiment of the present application;
FIG. 7 is a schematic view at a flow passage of another embodiment of the present application;
FIG. 8 is a schematic view at a recycling structure of another embodiment of the present application.
100, a magnetic coagulation sedimentation tank sewage treatment system; 200. a sedimentation tank; 300. a magnetic separation device; 310. a frame; 320. rotating the drum; 321. a sealing seat; 330. a drive structure; 331. a variable frequency speed regulating motor; 332. a gear pair; 333. a speed reducer; 340. a flow channel; 341. a turbulent flow plate; 3411. a top plate; 3412. a side plate; 342. an arc-shaped baffle plate; 350. a water inlet; 351. an electromagnetic meter; 352. adjusting the weir plate; 3521. a first baffle plate; 3522. a second baffle; 3523. a fixing member; 360. a water outlet; 361. emptying the pipe; 362. a control switch; 370. a magnetic attraction structure; 371. a neodymium iron boron magnet; 380. a recovery structure; 381. a squeegee; 382. an adjustment structure; 383. a recovery hopper; 390. a flushing device; 400. a coagulation tank; 500. a mixing tank; 600. a flocculation tank.
Detailed Description
It is to be understood that the terminology, the specific structural and functional details disclosed herein are for the purpose of describing particular embodiments only, and are representative, but that the present application may be embodied in many alternate forms and should not be construed as limited to only the embodiments set forth herein.
In the description of the present application, the terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating relative importance or as implicitly indicating the number of technical features indicated. Thus, unless otherwise specified, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature; "plurality" means two or more. The terms "comprises" and "comprising," and any variations thereof, are intended to cover a non-exclusive inclusion, such that one or more other features, integers, steps, operations, elements, components, and/or combinations thereof may be present or added.
Further, terms of orientation or positional relationship indicated by "center", "lateral", "upper", "lower", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, are described based on the orientation or relative positional relationship shown in the drawings, are simply for convenience of description of the present application, and do not indicate that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present application.
Furthermore, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly and may include, for example, fixed connections, removable connections, and integral connections; can be mechanically or electrically connected; either directly or indirectly through intervening media, or through both elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
The present application is described in detail below with reference to the figures and alternative embodiments.
As shown in fig. 1, as an embodiment of the present application, a magnetic coagulation sedimentation tank 200 sewage treatment system 100 is disclosed, the magnetic coagulation sedimentation tank 200 sewage treatment system 100 comprises a coagulation tank 400, a mixing tank 500, a flocculation tank 600, a sedimentation tank 200 and a magnetic separation device 300 as described above which are sequentially communicated, a water inlet of the magnetic separation device 300 is communicated with a residual sludge pipe of the sedimentation tank 200 for separating magnetic powder in residual sludge of the sedimentation tank 200, the separated magnetic powder flows back to the mixing tank 500 from a recovery hopper in the magnetic separation device 300 for recycling, and sludge without magnetic powder flows to the residual sludge tank from a water outlet; the coagulation tank 400 is used for coagulating colloid particles in the sewage into flocs, the mixing tank 500 is used for uniformly mixing the flocs obtained by the treatment of the coagulation tank 400 with magnetic powder and backflow sludge recovered by a magnetic separation device to form stable flocs taking the magnetic powder as a condensation nucleus, the coagulation tank 600 is used for coagulating the flocs obtained by the treatment of the mixing tank 500 into larger floc particles, and the sedimentation tank 200 is used for sedimentation treatment of larger particle floc particles obtained by the treatment of the coagulation tank 600. The magnetic separation device 300 can realize the processes of efficiently recovering magnetic powder and purifying water quality. The magnetic separation device 300 is generally arranged on the surface of the mixing tank 500 in the magnetic coagulation system and used for recovering magnetic powder in the residual sludge in the sedimentation tank 200, the magnetic separation recovery hopper is directly butted with the mixing tank 500, and the water inlet 350 is connected with a residual sludge pipe, so that the recovery and the cyclic utilization of the magnetic powder can be realized. Most of the magnetic separation devices 300 on the market have the problems of large occupied area, low magnetic powder recovery rate, fixed treatment capacity and poor sealing performance, and the magnetic separation devices 300 in the application can avoid the problems.
As shown in fig. 2 to 4, as another embodiment of the present application, a magnetic separation apparatus 300 is disclosed, which includes a frame 310, a rotating drum 320, a driving structure 330, a flow channel 340, a water inlet 350, a water outlet 360, a magnetic attraction structure 370, and a recovery structure 380, wherein the rotating drum 320 is disposed on the frame 310; the driving structure 330 is disposed on the frame 310, connected to the rotating drum 320, and controls the rotating drum 320 to rotate; the flow channel 340 is disposed outside the rotary drum 320, surrounds the bottom of the rotary drum 320, and is fixed to the frame 310; the water inlet 350 is communicated with one end of the flow channel 340, so that water flow can enter the flow channel 340; the water outlet 360 is communicated with the other end of the flow channel 340, and water entering the flow channel 340 is discharged from the water outlet 360; the magnetic attraction structure 370 is arranged around the inner side of the rotary drum 320 and fixed on the frame 310, so as to attract magnetic powder contained in the water flow of the flow channel 340 to the outer wall of the rotary drum 320; the recycling structure 380 is disposed outside the rotating drum 320 and fixed on the frame 310, and the recycling structure 380 is located above the water outlet 360 and is used for recycling magnetic powder adsorbed on the outer surface of the rotating drum 320; the magnetic attraction structure 370 is arc-shaped and disposed corresponding to the flow channel 340, and one end of the magnetic attraction structure is located above the vertical direction of the rotary drum 320, and the other end of the magnetic attraction structure is located below the recovery structure 380. According to the magnetic powder recycling device, magnetic powder of water flow in the flow channel 340 is adsorbed on the outer surface of the rotary roller 320 through the magnetic attraction structure 370, then the rotary roller 320 rotates the magnetic powder adsorbed on the surface of the rotary roller to the corresponding position of the recycling structure 380, and the rotary roller 320 at the recycling structure 380 is not provided with the magnetic attraction structure 370, so that the magnetic powder can fall into the recycling structure 380 under the action of gravity; in addition, as sewage is sequentially provided with the flow channel 340, most of magnetic powder in the sewage can be separated by the magnetic separation equipment 300 and then recovered, so that the magnetic powder recycling device has the effect of efficiently recycling the magnetic powder in the sewage.
In addition, the rotating drum 320 rotates in the direction opposite to the direction of the water flow in the flow passage 340. The water flow falls due to gravity after entering the magnetic separation device 300, and when the water flow flows in the flow passage 340 in a clockwise direction, the rotary drum 320 rotates in a counterclockwise direction; when the water flows in the flow passage 340 in the counterclockwise direction, the rotary drum 320 rotates in the clockwise direction; since the recovery structure 380 and the water inlet 350 are respectively disposed at both sides of the rotary drum 320, when the water flow direction is opposite to the rotation direction of the rotary drum 320, the magnetic powder on the rotary drum 320 can be dropped into the recovery structure 380 due to the gravity.
As shown in fig. 5, the driving structure 330 includes a variable frequency adjustable speed motor 331 and a speed reducer 333, the variable frequency adjustable speed motor 331 can adjust the rotation speed of the rotating drum 320, and the speed reducer 333 drives the rotating drum 320; an electromagnetic meter 351 is arranged at the water inlet 350 and used for detecting the flow rate of water flow at the water inlet 350; the electromagnetic meter 351 and the variable frequency speed regulating motor 331 are controlled in a centralized manner, and the variable frequency speed regulating motor 331 can adjust the rotating speed of the rotary drum 320 according to data detected by the electromagnetic meter 351. Through the feedback of electromagnetic meter 351 to the water inlet 350 outflow, the steerable relative speed that rotates cylinder 320 and rivers of variable frequency speed regulating motor 331 keeps certain, rotates the rotational speed of cylinder 320 and also can change thereupon when the sewage flow changes, makes like this that the magnetic powder that is adsorbed on rotating cylinder 320 distributes evenly, and recovery structure 380 is higher to the recovery efficiency of magnetic.
The driving structure 330 further comprises a gear pair 332, one end of the gear pair 332 is connected with the variable-frequency speed-regulating motor 331, the other end of the gear pair 332 is connected with the rotary drum 320, and the variable-frequency speed-regulating motor drives the rotary drum 320 to rotate through the gear pair 332. The driving effect of the variable-frequency speed-regulating motor 331 can be greatly improved by arranging the gear pair 332 component, if the variable-frequency speed-regulating motor 331 is directly connected with the rotating roller 320, the required torque is larger, and the addition of the gear pair 332 is equivalent to the addition of an amplifier of the torque, so that the variable-frequency speed-regulating motor 331 can drive the rotating roller 320 more easily; for the effect that a plurality of gears combine, gear pair 332's cooperation effect is better, and more saves space, consequently drive structure 330 in this application adopts gear pair 332 to make drive structure 330 succinct compact, reduces the volume.
As shown in fig. 6, the magnetic separation apparatus 300 includes a regulating weir 352, the regulating weir 352 is fixed to an inner wall of the water inlet 350, and the regulating weir 352 is disposed opposite to a direction of water flow in the water inlet 350. When external sewage enters the water inlet 350, the flow velocity of the sewage can be reduced by adjusting the weir plate 352, so that the water can be stably and uniformly fed into the magnetic separation equipment 300, the impact of water flow on magnetic powder adsorbed on the rotary drum 320 is reduced, and the recovery rate of the magnetic powder is improved.
The height of the regulating weir plate 352 is adjustable, and the regulating weir plate 352 can control the height of the regulating weir plate 352 according to different water inflow rates, so that the uniform and stable water flow entering the flow channel 340 is ensured. Specifically, the adjustable weir plate 352 comprises a first baffle 3521, a second baffle 3522 and a fixing member 3523, wherein the first baffle 3521 is fixed at the bottom of the water inlet 350, the fixing member 3523 fixes the second baffle 3522 on the first baffle 3521, and the distance between the top of the first baffle 3521 and the top of the second baffle 3522 is adjustable. Here, the height of the adjustable weir plate 352 may be adjusted by providing a plurality of coupling holes in the direction of the first baffle 3521 on the first baffle 3521, and the fixing members 3523 may be coupled to different coupling holes through the second baffle 3522, respectively.
As shown in fig. 7, the magnetic separation apparatus 300 includes a turbulent flow plate 341, and the turbulent flow plate 341 is disposed inside the flow passage 340 and is arranged perpendicular to the water flow direction. Because the density of the magnetic powder is greater than that of water, the magnetic powder generally sinks at the water bottom, and when water flows into the flow channel 340, the magnetic powder also sinks at the bottom of the flow channel 340, so that the distance between the magnetic powder and the magnetic attraction structure 370 is larger, and the magnetic attraction structure 370 has weaker attraction force on the magnetic powder; the turbulent flow plate 341 is arranged in the flow passage 340, so that water flow impacting on the turbulent flow plate 341 is disturbed, magnetic powder at the bottom is flushed to the upper side, the magnetic powder accumulation is prevented, the distance between the magnetic powder and the magnetic attraction structure 370 is reduced, and the magnetic powder and the rotary roller 320 are ensured to be within the optimal recovery distance. The turbulent flow plate 341 in the flow passage 340 is provided in plural, so that the water flow can continuously impact the turbulent flow plate 341, and the magnetic powder in each position in the flow passage 340 is not easy to accumulate at the bottom of the flow passage 340.
Specifically, the turbulent flow plate 341 includes a top plate 3411 and a side plate 3412, two ends of the side plate 3412 in the length direction are fixed to two sides of the flow channel 340 away from the magnetic attraction structure 370, one end of the side plate 3412 in the width direction is fixed to the top plate 3411, and the side plate 3412 and the top plate 3411 are vertically disposed; one end of the side plate 3412 in the width direction is directed to the axial center of the rotary drum 320. Because one end of the side plate 3412 points to the axis of the rotary drum 320, the side plate 3412 is arranged opposite to the water flow direction, so that the turbulent effect is strongest when the water flow impacts on the side plate 3412, and magnetic powder at the bottom can rise to a higher position, and is easier to be adsorbed on the outer surface of the rotary drum 320; the top plate 3411 is provided to restrict the flow of water and magnetic particles from passing between the top plate 3411 and the rotating drum 320, and to ensure that the magnetic particles are within an optimal recovery distance from the rotating drum 320. The top plate 3411 has one end connected to an end of the side plate 3412 and the other end facing the flow direction of the water flow, preventing magnetic particles from accumulating between the top plate 3411 and the side plate 3412.
Moreover, the magnetic separation device 300 further includes arc-shaped baffles 342, and the arc-shaped baffles 342 are disposed on two side surfaces of the flow channel 340, which are also boundaries of the magnetic attraction structure 370, and are attached to the outer surface of the rotating drum 320. The action of the arcuate baffles 342 restricts water flow in the flow channel 340 and ensures that water flows through the magnetic field covered area.
As shown in fig. 8, the recovery structure 380 includes a scraper 381, a regulating structure 382 and a recovery bucket 383; one end of the scraper 381 is fixed on the frame 310, and the other end is attached to the outer surface of the rotary drum 320; the adjusting structure 382 is connected to the scraping blade 381, and is used for adjusting the distance between the scraping blade 381 and the rotating cylinder 320; the recycling hopper 383 is fixed on the frame 310, is located below the scraper 381, and is used for storing magnetic powder scraped off from the rotary drum 320 by the scraper 381. In order to prevent the magnetic powder from falling off due to gravity even if the magnetic powder on the rotary drum 320 reaches the recovery position of the recovery structure 380 under the action of the magnetic field, the scraper 381 can scrape off the magnetic powder adsorbed on the rotary drum 320; the scraper 381 and the rotary roller 320 are kept at a certain distance by the adjusting structure 382, so that friction between the scraper 381 and the rotary roller 320 is avoided; since the rotating direction of the rotating roller 320 is opposite to the inclined direction of the scraper 381, when the scraper 381 hangs down the magnetic powder from the rotating roller 320, the magnetic powder slides down the scraper 381 into the recovery bucket 383, because the bottom of the scraper 381 is at the opening of the recovery bucket 383. In addition, the lower end of the scraper 381 and the whole flow passage 340 have magnetic force, and magnetic powder which can not be scraped completely can be firmly adsorbed on the rotary roller 320 even if passing through the scraper 381, so that the magnetic powder can not be discharged into and out of the water tank, and the recovery rate of the magnetic powder is ensured.
The magnetic separation apparatus 300 comprises a washing device 390, wherein the washing device 390 is fixed on the frame 310 and is disposed above the recovery structure 380. The washing device 390 can release water flow to impact the rotary drum 320, and firstly can wash off magnetic powder on the surface of the rotary drum 320 and fall into the recovery structure 380; in addition, after the magnetic separation device 300 is used up, the dirt on the rotary drum 320 can be washed.
The magnetic attraction structure 370 comprises a plurality of neodymium iron boron magnets 371 distributed at intervals, the distribution range of the high-magnetism neodymium iron boron magnets 371 on the inner surface of the rotary roller 320 is not more than three quarters of the circumference of the rotary roller 320, and the recovery structure 380 is provided with no neodymium iron boron magnets 371. The reason why the neodymium iron boron magnet 371 is made into the magnetic attraction structure 370 is that the magnet has strong magnetism and good adsorption effect on magnetic powder; the plurality of the neodymium iron boron magnets 371 distributed at intervals can be more easily arranged in the rotating roller 320, magnetic field superposition can be generated between the adjacent neodymium iron boron magnets 371, the magnets are distributed at intervals, the material of the magnets can be reduced, and waste caused by the magnetic field superposition can be avoided; the plurality of magnets are arranged reasonably so that the entire flow channel 340 is within the magnetic force range of the magnetic attraction structure 370.
In this application, the magnetic powder drops to the recovery fill 383 through its self gravity, scraper 381 effect and these three steps of washing unit 390, guaranteed that the magnetic powder attached to on rotating the cylinder 320 can be retrieved as far as possible to retrieve and fill 383 in for the magnetic powder in the sewage can be retrieved by the efficient.
In addition, the magnetic separation apparatus 300 further includes an evacuation pipe 361 and a control switch 362, the evacuation pipe 361 is connected to the control switch 362, and the control switch 362 controls the evacuation pipe 361 to be opened and closed; one end of the emptying pipe 361 is communicated with the bottom of the flow channel 340, and the other end of the emptying pipe 361 is communicated with the water outlet 360. After the magnetic separation device 300 is used up, as the end part of the water outlet 360, which flows to, is higher than the bottom of the flow channel 340, part of the sewage is remained in the flow channel 340, and the emptying pipe 361 is arranged to discharge the part of the sewage to prevent the sewage from remaining; the control switch 362 can control the opening and closing of the emptying pipe 361, when the magnetic separation device 300 is used, in order to ensure that magnetic powder in sewage can be adsorbed as much as possible, the sewage needs to flow from the water inlet 350 to the water outlet 360 through the whole flow passage 340, and at this time, the control switch 362 controls the closing of the emptying pipe 361; when the magnetic separation apparatus 300 is used up and the sewage remaining in the flow channel 340 needs to be cleaned, the control switch 362 controls the emptying pipe 361 to be opened to empty the sewage.
The both ends of rotating cylinder 320 still are provided with seal receptacle 321, prevent to rotate cylinder 320 and take out sewage from runner 340 at the pivoted in-process, prevent to pollute the surrounding environment to seal receptacle 321 can also prevent that the magnetic from receiving the centrifugal force that rotates cylinder 320 and being thrown away, sets up seal receptacle 321 and can guarantee that the magnetic can not spill, can retrieve high-efficiently.
The foregoing is a more detailed description of the present application in connection with specific alternative embodiments, and the specific implementations of the present application are not to be considered limited to these descriptions. For those skilled in the art to which the present application pertains, several simple deductions or substitutions may be made without departing from the concept of the present application, and all should be considered as belonging to the protection scope of the present application.
Claims (10)
1. A magnetic separation apparatus, comprising:
a frame;
the rotary drum is arranged on the rack;
the driving structure is arranged on the rack, is connected with the rotating roller and controls the rotating roller to rotate;
the runner is arranged on the outer side of the rotary drum, arranged around the bottom of the rotary drum and fixed on the rack;
the water inlet is communicated with one end of the flow channel so that water flow can enter the flow channel;
the water outlet is communicated with the other end of the flow channel, and water entering the flow channel is discharged from the water outlet;
the magnetic attraction structure is arranged around the inner side of the rotary roller and is fixed on the rack; and
the recycling structure is arranged on the outer side of the rotating roller and fixed on the rack, is positioned above the water outlet and is used for recycling magnetic powder adsorbed on the outer surface of the rotating roller;
the magnetic attraction structure is arc-shaped and corresponds to the flow channel, one end of the magnetic attraction structure is located above the vertical direction of the rotary roller, and the other end of the magnetic attraction structure is located below the recovery structure.
2. A magnetic separation apparatus according to claim 1 wherein the drive structure includes a variable frequency variable speed motor controlling the rotational speed of the rotating drum and a speed reducer driving the rotating drum;
the water inlet is provided with an electromagnetic meter used for detecting the flow of water flow at the water inlet;
the electromagnetic meter and the variable-frequency speed-regulating motor are controlled in a centralized manner, and the variable-frequency speed-regulating motor can adjust the rotating speed of the rotating roller according to data detected by the electromagnetic meter.
3. A magnetic separation device according to claim 1 wherein the magnetic separation device includes a regulating weir secured to an inner wall of the inlet opening, the regulating weir being disposed opposite the direction of water flow in the inlet opening.
4. A magnetic separation device according to claim 1 wherein the rotating drum rotates in a direction opposite to the direction of water flow in the flow path.
5. A magnetic separation apparatus according to claim 2 wherein the recovery structure comprises a scraper, a conditioning structure and a recovery hopper;
one end of the scraper is fixed on the rack, and the other end of the scraper is attached to the outer surface of the rotary drum;
the adjusting structure is connected with the scraping plate and used for adjusting the distance between the scraping plate and the rotary drum;
the recycling hopper is fixed on the rack and located below the scraper and used for containing magnetic powder scraped off by the scraper on the rotary drum.
6. A magnetic separation apparatus according to claim 5 including flushing means fixed to the frame and disposed above the scraper.
7. A magnetic separation device according to claim 4 wherein the magnetic separation device comprises a turbulence plate disposed within the flow passage and arranged perpendicular to the direction of water flow.
8. A magnetic separation device according to claim 7 wherein the turbulent flow plate comprises a top plate and side plates, both ends of the side plates in the length direction are fixed at both sides of the magnetic attraction structure in the flow passage, one end of the side plates in the width direction is fixed with the top plate, and the side plates and the top plate are arranged vertically;
one end of the side plate in the width direction points to the axis of the rotary drum.
9. A magnetic separation device according to claim 7 further comprising an evacuation pipe and a control switch, the evacuation pipe being connected to the control switch, the control switch controlling the evacuation pipe to open and close;
one end of the emptying pipe is communicated with the bottom of the flow passage, and the other end of the emptying pipe is communicated with the water outlet.
10. A sewage treatment system of a magnetic coagulation sedimentation tank is characterized by comprising a coagulation tank, a mixing tank, a flocculation tank, a sedimentation tank and the magnetic separation equipment according to any one of claims 1 to 9 which are sequentially communicated, wherein a water inlet of the magnetic separation equipment is communicated with a residual sludge pipe of the sedimentation tank and is used for separating magnetic powder in residual sludge in the sedimentation tank, the separated magnetic powder flows back to the mixing tank from a recovery hopper in the magnetic separation equipment for recycling, and sludge without the magnetic powder flows to the residual sludge tank from a water outlet; the coagulating basin is used for coagulating colloidal particles in the sewage into flocs, the mixing tank is used for uniformly mixing the flocs obtained through the coagulation basin treatment with magnetic powder and backflow sludge recovered by a magnetic separation device to form stable flocs taking the magnetic powder as a condensation nucleus, the coagulating basin is used for coagulating the stable flocs obtained through the mixing tank treatment into larger floc particles, and the sedimentation tank is used for settling the larger floc particles obtained through the flocculation basin treatment.
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| CN113000202A (en) * | 2021-03-05 | 2021-06-22 | 坎布里奇环保科技(北京)有限公司 | Magnetic coagulation high-gradient magnetic separator |
| CN115043468A (en) * | 2022-07-11 | 2022-09-13 | 中国铁建重工集团股份有限公司 | Magnetic powder recovery device, super-magnetic sewage treatment system and treatment method |
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| CN110590049B (en) | 2024-02-02 |
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