CN216890507U - Magnetic coagulation sedimentation device - Google Patents

Abstract

The utility model discloses a magnetic coagulation sedimentation device, which comprises a coagulation tank, a flocculation tank and a sedimentation tank which are sequentially communicated, wherein the sedimentation tank is provided with a mud bucket, a backflow system is connected with a first outlet of the mud bucket and the flocculation tank, a first mud pipe is connected with a second outlet of the mud bucket, the second outlet is higher than the first outlet, the magnetic powder recovery system comprises a magnetic powder reclaimer, the magnetic powder reclaimer is provided with a sludge inlet, a magnetic powder outlet and a sludge outlet, the sludge inlet is connected with the second outlet of the mud bucket, the magnetic powder outlet is connected with the flocculation tank, and the sludge outlet is connected with the first mud pipe; waste water takes place the coagulation reaction in the coagulation tank, sewage after the reaction flows into the flocculation basin to fully react with flocculating agent and magnetic, then flows into the sedimentation tank and deposits, and lower floor's mud in the bagger flows back to the flocculation basin, and the magnetic in the upper sludge in the bagger flows back to the flocculation basin after the screening of magnetic recovery machine, can reduce the dosage of flocculating agent from this, has the characteristics that the running cost is low and the treatment effeciency is high.

Description

Magnetic coagulation sedimentation device

Technical Field

The utility model relates to the technical field of wastewater treatment, in particular to a magnetic coagulation sedimentation device.

Background

In the mine wastewater treatment process, a membrane concentration system is generally adopted to filter the wastewater, and in order to ensure that reverse osmosis membrane elements in the membrane concentration system are not damaged mechanically or chemically, the mine wastewater is generally required to be pretreated. The traditional pretreatment process is a water treatment method which comprises the steps of adding a coagulant into mine wastewater, coagulating colloids and fine suspended matters which are difficult to precipitate in water into floccules, and then precipitating to separate and remove the floccules.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a magnetic coagulation sedimentation device which can solve the technical problems of high operation cost and low treatment efficiency of a wastewater pretreatment method in the related art.

In order to solve the problems, the utility model adopts the following technical scheme:

the embodiment of the utility model discloses a magnetic coagulation sedimentation device, which comprises a coagulation tank, a flocculation tank, a sedimentation tank, a backflow system, a sludge discharge system and a magnetic powder recovery system, wherein the coagulation tank is arranged on the bottom of the sedimentation tank; wherein:

the coagulation tank, the flocculation tank and the sedimentation tank are communicated in sequence;

the sedimentation tank is provided with a mud bucket, the reflux system comprises a first reflux pipe and a reflux pump, the first reflux pipe is connected with a first outlet of the mud bucket and the flocculation tank, and the reflux pump is arranged on the first reflux pipe;

the sludge discharge system comprises a first sludge discharge pipe and a sludge discharge pump, the first sludge discharge pipe is connected with a second outlet of the sludge bucket, the sludge discharge pump is arranged on the first sludge discharge pipe, and the second outlet is higher than the first outlet;

the magnetic powder recovery system comprises a magnetic powder recovery machine, the magnetic powder recovery machine is provided with a sludge inlet, a magnetic powder outlet and a sludge outlet, the sludge inlet is connected with the second outlet of the sludge bucket, the magnetic powder outlet is connected with the flocculation tank, and the sludge outlet is connected with the first sludge discharge pipe.

The technical scheme adopted by the utility model can achieve the following beneficial effects:

the embodiment of the utility model discloses a magnetic coagulation sedimentation device, which is characterized in that a coagulant is added into a coagulation tank, a flocculant and magnetic powder are added into a flocculation tank, mine mining wastewater is subjected to coagulation reaction with the coagulant in the coagulation tank, the reacted wastewater flows into the flocculation tank and fully reacts with the flocculant and the magnetic powder, then flows into the sedimentation tank for sedimentation, clear water generated by sedimentation flows to a membrane concentration system, sludge generated by sedimentation converges in a hopper, the magnetic powder content in lower-layer sludge in the hopper is higher, the lower-layer sludge flows back to the flocculation tank through a first return pipe and continues to react, the magnetic powder content in upper-layer sludge in the hopper is lower, the upper-layer sludge flows through a magnetic powder recovery machine, the magnetic powder in the upper-layer sludge is screened by the magnetic powder recovery machine and then flows back to the flocculation tank, the screened sludge flows to a first sludge discharge pipe, so that the dosage of the flocculant can be reduced, and the density of floccules generated by the flocculation tank is high, Easy precipitation, magnetic powder recycling, low operation cost and high treatment efficiency.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a magnetic coagulation sedimentation device according to an embodiment of the present application;

fig. 2 is a partially enlarged schematic view at a in fig. 1.

In the figure:

100-a coagulation tank;

200-a flocculation tank and 210-a stirring container;

300-a sedimentation tank, 310-a mud bucket;

410-a first return line, 420-a return pump;

510-a first sludge discharge pipe, 520-a sludge discharge pump;

610-magnetic powder recovery machine, 620-second return pipe, 630-second sludge discharge pipe;

700-a first stirrer;

800-a second agitator;

910-coagulant dosing pipe, 920-flocculant dosing pipe, 921-dosing section;

1000-honeycomb duct;

1100-mud scraper, 1110-auxiliary scraper;

1200-a baffle, 1210-a first section, 1220-a second section;

1310-a first valve, 1320-a second valve, 1330-a third valve, 1340-a fourth valve;

1400-first separator, 1500-second separator.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the utility model, and not restrictive of the full scope of the utility model. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.

The terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It will be appreciated that the data so used may be interchanged under appropriate circumstances such that embodiments of the application may be practiced in sequences other than those illustrated or described herein, and that the terms "first," "second," and the like are generally used herein in a generic sense and do not limit the number of terms, e.g., the first term can be one or more than one. In addition, "and/or" in the specification and claims means at least one of connected objects, a character "/" generally means that a preceding and succeeding related objects are in an "or" relationship.

The magnetic coagulation sedimentation device provided by the embodiment of the present application is described in detail by referring to fig. 1 to fig. 2 through specific embodiments and application scenarios thereof.

Referring to fig. 1 to 2, the embodiment of the present application discloses a magnetic coagulation sedimentation device, and the disclosed magnetic coagulation sedimentation device includes a coagulation tank 100, a flocculation tank 200, a sedimentation tank 300, a backflow system, a sludge discharge system, and a magnetic powder recovery system.

Wherein, the coagulation tank 100, flocculation tank 200 and sedimentation tank 300 communicate in proper order, to adding the coagulant in the coagulation tank 100, the coagulant can be polyaluminium chloride, to adding flocculating agent and magnetic in the flocculation tank 200, the flocculating agent can be polyacrylamide, mine mining waste water takes place coagulation reaction in the coagulation tank 100, sewage after coagulation reaction flows into the flocculation tank 200, and fully react with flocculating agent and magnetic, sewage after flocculation reaction flows into the sedimentation tank 300 and deposits, clear water flow direction membrane concentration system that the sediment produced filters, the mud deposit that the sediment produced is in the bottom of sedimentation tank 300.

In the embodiment of the present application, the bottom of the sedimentation tank 300 is hopper-shaped, that is, the center of the bottom of the sedimentation tank 300 is lower than the edge of the bottom, and the sludge generated by sedimentation in the sedimentation tank 300 can be concentrated in the middle of the sedimentation tank 300. The bottom of the sedimentation tank 300 is provided with a mud bucket 310, the mud bucket 310 is positioned at the center of the bottom of the sedimentation tank 300, a mud scraper 1100 is arranged in the sedimentation tank 300, and the mud scraper 1100 can scrape the mud settled in the sedimentation tank 300 into the mud bucket 310.

The reflux system comprises a first reflux pipe 410 and a reflux pump 420, two ends of the first reflux pipe 410 are respectively connected with the first outlet of the mud bucket 310 and the flocculation tank 200, the reflux pump 420 is arranged on the first reflux pipe 410 and provides driving force for sludge reflux, and under the driving action of the reflux pump 420, magnetic powder deposited at the bottom of the mud bucket 310 can reflux into the flocculation tank 200 to continuously participate in reaction.

The sludge discharging system comprises a first sludge discharging pipe 510 and a sludge discharging pump 520, wherein the first sludge discharging pipe 510 is connected with a second outlet of the sludge bucket 310, the sludge discharging pump 520 is arranged on the first sludge discharging pipe 510 and provides driving force for discharging sludge, and the second outlet is higher than the first outlet.

The magnetic powder recovery system comprises a magnetic powder recovery machine 610, the magnetic powder recovery machine 610 is provided with a sludge inlet, a magnetic powder outlet and a sludge outlet, the sludge inlet is connected with the second outlet of the mud bucket 310, the magnetic powder outlet is connected with the flocculation tank 200, the sludge outlet is connected with the first mud pipe 510, under the driving of the mud pump 520, the upper layer sludge of the mud bucket 310 can be discharged through the first mud pipe 510, and then drying and external transportation are carried out; or, the upper layer sludge of the hopper 310 can be screened by the magnetic powder recycling machine 610, the screened sludge flows back to the first sludge discharge pipe 510 through the sludge outlet, and the screened magnetic powder flows back to the flocculation tank 200 through the magnetic powder outlet.

The utility model provides a magnetism coagulating sedimentation device, magnetic content is great in the lower floor mud in the bagger 310, can be through first export, first return pipe 410 directly flows back and continues to participate in flocculation reaction in the flocculation basin 200, magnetic content is less in the upper sludge in the bagger 310, upper sludge flows into magnetic recovery machine 610 through the second export, magnetic in the upper sludge flows back to flocculation basin 200 after the screening of magnetic recovery machine 610, the mud flow direction first mud pipe 510 after being screened, can reduce the dosage of flocculating agent from this, the flocculent body density that produces in the flocculation basin is big, easily deposit, magnetic recycle, have the advantage that running cost is low and the treatment effeciency is high.

As can be seen from the foregoing, the upper layer sludge of the bagger 310 may be directly discharged through the first sludge discharge pipe 510, or the upper layer sludge of the bagger 310 may be discharged after being screened for magnetic powder by the magnetic powder recycling machine 610; based on this, referring to fig. 1, in the embodiment of the present application, the magnetic particle recycling system further includes a second return pipe 620 and a second sludge discharge pipe 630, the second return pipe 620 connects the second outlet and the sludge inlet of the magnetic particle recycling machine 610, and the second sludge discharge pipe 630 connects the sludge outlet of the magnetic particle recycling machine 610 and the first sludge discharge pipe 510, so as to discharge the sludge after magnetic particle screening.

In the embodiment of the application, the coagulation tank 100 is connected with a coagulant feeding pipe 910, the coagulant feeding pipe 910 is connected with a coagulant storage device, the coagulant feeding pipe 910 feeds a coagulant into the coagulation tank 100, the coagulation tank 100 is internally provided with a first stirrer 700, and mine mining wastewater and the coagulant are fully mixed under the stirring of the first stirrer 700, so that suspended matters in the wastewater are rapidly coagulated into larger particles; flocculation tank 200 is connected and is provided with flocculating agent and adds pencil 920, flocculating agent adds pencil 920 and is connected with flocculating agent storage facilities, flocculating agent adds pencil 920 and adds the flocculating agent to flocculation tank 200, be provided with second agitator 800 in the flocculation tank 200, under the stirring of second agitator 800, waste water and flocculating agent and magnetic intensive mixing in the inflow flocculation tank 200, thereby the granule and the magnetic bonding that will coagulate the production fast form bigger flocculent body, the magnetic has increased the density of flocculent body, its rapid sedimentation accelerates.

In a further technical scheme, a stirring container 210 is arranged in the flocculation tank 200, a second stirrer 800 is arranged in the stirring container 210, and a flocculant dosing pipe 920 is connected with the stirring container 210 and is positioned below the second stirrer 800; a flow guide pipe 1000 is arranged between the coagulation tank 100 and the flocculation tank 200, one end of the flow guide pipe 1000 is connected with the coagulation tank 100, and the other end of the flow guide pipe 1000 is connected with the stirring container 210 and is positioned below the flocculant dosing pipe 920; the top of stirred vessel 210 is provided with the play water opening, goes out water opening towards sedimentation tank 300 to make stirred vessel 210's play water direct flow to sedimentation tank 300, avoid dispersing in flocculation tank 200, magnetic powder exit linkage to goes out water opening department.

Under the arrangement, the coagulation tank 100 is communicated with the flocculation tank 200 through the flow guide pipe 1000, sewage after coagulation reaction flows into the stirring container 210 through the flow guide pipe 1000, under the stirring action of the second stirrer 800, sewage and a flocculating agent are fully mixed and have a flocculation reaction to generate alum flocs, compared with the flocculation tank 200, the space of the stirring container 210 is smaller, the sewage and the flocculating agent respectively enter the stirring container 210 and have a flocculation reaction in the stirring container 210, the concentration of a reactant can be improved, the sewage and the flocculating agent are fully mixed, the generation efficiency of the alum flocs is improved, the alum flocs float up and flow out from a water outlet opening to enter the sedimentation tank 300, magnetic powder is added at the water outlet of the flocculation tank 200, the first backflow pipe 410 can also be connected to the water outlet of the flocculation tank 200, the magnetic powder and the alum blossom can be uniformly mixed by utilizing water flow, and the alum blossom is prevented from being dispersed and not beneficial to precipitation due to the mixing of the magnetic powder and the alum blossom caused by mechanical disturbance.

In the embodiment of the present application, the first stirrer 700 and the second stirrer 800 may be various existing stirrers, such as a pneumatic stirrer, an electric stirrer, etc.; in an alternative embodiment, each of the first mixer 700 and the second mixer 800 includes a motor and a mixing roller connected to the motor, the mixing roller of the first mixer 700 is located in the coagulation tank 100, the mixing roller of the second mixer 800 is located in the mixing container 210, and the electric mixer has the advantages of convenient control, low noise and stable operation.

In a further technical scheme, the flocculant dosing pipe 920 is provided with an annular dosing section 921, the dosing section 921 is arranged in the stirring container 210, and the dosing section 921 is provided with a plurality of medicine outlets which are distributed along the circumferential direction of the stirring container 210; so set up down, the rivers that get into stirred vessel 210 through honeycomb duct 1000 are encircleed by medicine section 921, can make sewage and flocculating agent intensive mixing, make flocculation reaction more abundant, guarantee the treatment effeciency of sewage.

As can be seen from the foregoing, the flocculation tank 200 is communicated with the sedimentation tank 300, and if the upper portion of the flocculation tank 200 is communicated with the sedimentation tank 300, flocs generated by flocculation reaction may be directly precipitated in the flocculation tank 200; if the lower part of the sedimentation tank 300 is communicated with the flocculation tank 200, the sewage entering the sedimentation tank 300 inevitably disturbs the bottom of the sedimentation tank 300, so that the sludge at the bottom of the sedimentation tank 300 floats upwards, and the sedimentation effect is affected.

Therefore, in the embodiment of the present application, a first partition 1400 and a second partition 1500 are disposed between the flocculation tank 200 and the sedimentation tank 300, the first partition 1400 and the bottom of the flocculation tank 200 form a water outlet of the flocculation tank 200, the second partition 1500 and the upper portion of the sedimentation tank 300 form a water inlet of the sedimentation tank 300, the water inlet of the sedimentation tank 300 is located above the water outlet of the flocculation tank 200, and a water flow channel is formed between the first partition 1400 and the second partition 1500; so set up down, flocculation reaction produces the floccule and flows out through the delivery port of flocculation basin 200 below, the rivers passageway between first baffle 140 and the second baffle 150 of flowing through to the water inlet through the sedimentation tank 300 top flows into the sedimentation tank 300, can make in the floccule in the flocculation basin 200 carried the entering sedimentation tank 300 by sewage, avoid deposiing in the bottom of flocculation basin 200, can avoid again entering the sewage impact sedimentation tank 300 in the bottom and cause the mud come-up, guarantee the sedimentation effect of sedimentation tank 300.

In the embodiment of the present application, a flow guide plate 1200 is disposed in the sedimentation tank 300, the flow guide plate 1200 is disposed at the water inlet of the sedimentation tank 300, a flow guide channel is formed between the flow guide plate 1200 and the tank wall of the sedimentation tank 300, and the flow guide channel faces the tank bottom of the sedimentation tank 300; based on the existence of the guide plate 1200, the sewage can be prevented from transversely flowing and directly discharged from the water outlet of the sedimentation tank 300 when just entering the sedimentation tank 300, and the sewage can be ensured to have enough sedimentation time in the sedimentation tank 300.

In a further technical scheme, the guide plate 1200 comprises a first section 1210 and a second section 1220 which are connected with each other, the first section 1210 is vertically arranged, the second section 1220 is obliquely arranged relative to the first section 1210, a first section channel is formed between the first section 1210 and the wall of the sedimentation tank 300, a second section channel is formed between the second section 1220 and the wall of the sedimentation tank 300, that is, the guide channel comprises a first section channel and a second section channel, the width of the second section channel is greater than that of the first section channel, and sewage in the flocculation tank 200 sequentially flows into the sedimentation tank 300 through the first section channel and the second section channel; so set up down, based on the existence of first section 1210, can avoid sewage lateral flow when just getting into sedimentation tank 300 and directly discharge from the delivery port of sedimentation tank 300, meanwhile, based on the existence of second section 1220, can make the sewage that gets into sedimentation tank 300 evenly distributed in sedimentation tank 300, the width of second section passageway is greater than the width of first section passageway, the flow area who makes the second section passageway is greater than the flow area of first section passageway, can slow down the velocity of water flow, avoid rivers impact sedimentation tank 300's bottom and cause the mud come-up.

As can be seen from the foregoing, a mud scraper 1100 is provided in the sedimentation tank 300, and the mud scraper 1100 is used for scraping the mud in the sedimentation tank 300 into the mud bucket 310. In a further technical scheme, the mud scraper 1100 is connected with an auxiliary scraper 1110, the auxiliary scraper 1110 is attached to the side wall of the mud bucket 310, the auxiliary scraper 1110 is located in the mud bucket 310, and the auxiliary scraper 1110 can rotate along with the rotation of the mud scraper 1100; under such a configuration, when the mud scraper 1100 scrapes off the bottom sludge of the sedimentation tank 300, the auxiliary scraper 1110 scrapes off the sludge attached to the sidewall of the hopper 310, thereby improving the backflow efficiency of the magnetic powder and the sludge.

In a further solution, the first return pipe 410 is provided with a first valve 1310, the first sludge discharge pipe 510 is provided with a second valve 1320, the second return pipe 620 is provided with a third valve 1330, and the second sludge discharge pipe 630 is provided with a fourth valve 1340.

Under such a configuration, at the initial stage of sedimentation, the magnetic powder content in the sediment is high, the reflux pump 420 and the first valve 1310 can be opened, the sludge discharge pump 520, the second valve 1320, the third valve 1330 and the fourth valve 1340 can be closed, and the magnetic powder firstly sedimented can directly flow back to the flocculation tank 200 through the first reflux pipe 410; in the middle stage of sedimentation, the sediment mainly contains sludge and magnetic powder, the sludge pump 520, the third valve 1330 and the fourth valve 1340 can be continuously started, the lower sludge in the sludge hopper 310 directly flows back to the flocculation tank 200 through the first return pipe 410, the magnetic powder in the upper sludge flows back to the flocculation tank 200 after being screened by the magnetic powder recovery machine 610, and the return utilization rate of the magnetic powder and the discharge efficiency of the sludge can be improved. At the later stage of precipitation, close the magnetic powder outlet of magnetic powder recycling machine 610, after magnetic powder recycling machine 610 finishes retrieving the magnetic powder in the mud, close backwash pump 420, first valve 1310, third valve 1330 and fourth valve 1340, open second valve 1320, under the drive of sludge pump 520, mud is direct outwards discharged through first sludge pipe 510, avoids the magnetic powder to cause the loss along with the mud is discharged, reduces the running cost of magnetic coagulation sedimentation device.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. Further, it should be noted that the scope of the methods and apparatus of the embodiments of the present application is not limited to performing the functions in the order illustrated or discussed, but may include performing the functions in a substantially simultaneous manner or in a reverse order based on the functions involved, e.g., the methods described may be performed in an order different than that described, and various steps may be added, omitted, or combined. In addition, features described with reference to certain examples may be combined in other examples.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention.

Claims (10)

1. The magnetic coagulation sedimentation device is characterized by comprising a coagulation tank (100), a flocculation tank (200), a sedimentation tank (300), a backflow system, a sludge discharge system and a magnetic powder recovery system; wherein:

the coagulation tank (100), the flocculation tank (200) and the sedimentation tank (300) are communicated in sequence;

the sedimentation tank (300) is provided with a mud bucket (310), the backflow system comprises a first backflow pipe (410) and a backflow pump (420), the first backflow pipe (410) is connected with a first outlet of the mud bucket (310) and the flocculation tank (200), and the backflow pump (420) is arranged on the first backflow pipe (410);

the sludge discharge system comprises a first sludge discharge pipe (510) and a sludge discharge pump (520), the first sludge discharge pipe (510) is connected with a second outlet of the sludge bucket (310), the sludge discharge pump (520) is arranged on the first sludge discharge pipe (510), and the second outlet is higher than the first outlet;

magnetic particle recovery system includes magnetic particle recovery machine (610), magnetic particle recovery machine (610) have mud entry, magnetic particle export and mud export, the mud entry connection the second export of mud bucket (310), the magnetic particle exit linkage flocculation basin (200), the mud exit linkage first mud pipe (510).

2. The magnetic coagulation sedimentation device according to claim 1, wherein a first stirrer (700) is provided in the coagulation tank (100), and a second stirrer (800) is provided in the flocculation tank (200).

3. The magnetic coagulation sedimentation device according to claim 2, further comprising a coagulant dosing pipe (910) and a flocculant dosing pipe (920), wherein the coagulant dosing pipe (910) is connected to the coagulation tank (100), and the flocculant dosing pipe (920) is connected to the flocculation tank (200).

4. The magnetic coagulation sedimentation device according to claim 3, wherein a stirring container (210) is arranged in the flocculation tank (200), the second stirrer (800) is arranged in the stirring container (210), and the flocculant dosing pipe (920) is connected with the stirring container (210) and is positioned below the second stirrer (800);

a flow guide pipe (1000) is arranged between the coagulation tank (100) and the flocculation tank (200), one end of the flow guide pipe (1000) is connected with the coagulation tank (100), and the other end of the flow guide pipe (1000) is connected with the stirring container (210) and is positioned below the flocculant dosing pipe (920);

the top of stirred vessel (210) is provided with out the water opening, go out the water opening orientation sedimentation tank (300), magnetic powder outlet connection is to go out water opening part.

5. The magnetic coagulation sedimentation device according to claim 4, wherein the flocculant dosing pipe (920) has an annular dosing section (921), the dosing section (921) is provided in the stirring container (210), the dosing section (921) is provided with a plurality of drug outlets, and the drug outlets are distributed along the circumferential direction of the stirring container (210).

6. The magnetic coagulation sedimentation device according to claim 1, wherein a flow guide plate (1200) is arranged in the sedimentation tank (300), the flow guide plate (1200) is arranged at the water inlet of the sedimentation tank (300), and a flow guide channel is formed between the flow guide plate (1200) and the tank wall of the sedimentation tank (300) and faces the tank bottom of the sedimentation tank (300).

7. The magnetic coagulation sedimentation device according to claim 6, wherein the deflector (1200) comprises a first section (1210) and a second section (1220) which are connected with each other, the first section (1210) is vertically arranged, the second section (1220) is obliquely arranged relative to the first section (1210), a first section channel is formed between the first section (1210) and the wall of the sedimentation tank (300), a second section channel is formed between the second section (1220) and the wall of the sedimentation tank (300), and the width of the second section channel is larger than that of the first section channel.

8. The magnetic coagulation sedimentation device according to claim 1, wherein the center of the bottom of the sedimentation tank (300) is lower than the edge of the bottom of the sedimentation tank (300), and the mud bucket (310) is arranged at the center of the bottom of the sedimentation tank (300).

9. The magnetic coagulation sedimentation device according to claim 8, wherein a mud scraper (1100) is arranged in the sedimentation tank (300), the mud scraper (1100) is connected with an auxiliary scraper (1110), and the auxiliary scraper (1110) is positioned in the mud bucket (310).

10. The magnetic coagulation sedimentation device according to claim 1, wherein the magnetic particle recovery system further comprises a second return pipe (620) and a second sludge discharge pipe (630), the second outlet of the second return pipe (620) and the sludge inlet of the magnetic particle recovery machine (610), the second sludge discharge pipe (630) connecting the sludge outlet of the magnetic particle recovery machine (610) and the first sludge discharge pipe (510);

the first return pipe (410) is provided with a first valve (1310), the first sludge discharge pipe (510) is provided with a second valve (1320), the second return pipe (620) is provided with a third valve (1330), and the second sludge discharge pipe (630) is provided with a fourth valve (1340).

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