CN210505937U - Magnetic mud separator and sewage treatment device - Google Patents

Abstract

The utility model belongs to the technical field of sewage purification technique and specifically relates to a magnetic mud separator and sewage treatment plant is related to. The magnetic mud separator comprises a separation chamber, an isolation cylinder, a magnetic part and a driving part; a first cavity and a second cavity are formed in the separation chamber, the isolation cylinder is positioned in the second cavity, the magnetic part is positioned in the isolation cylinder, and the magnetic mud in the sewage can be attracted to the position close to the outer wall of the isolation cylinder by virtue of the magnetic force generated by the magnetic part; the magnetic part can move under the action of the driving part; along with the movement of the magnetic part, under the action of the magnetic force of the magnetic part, the magnetic sludge in the sewage in the second chamber is conveyed into the first request; the magnetic mud entering the first chamber cannot return to the second chamber due to the separation between the two chambers, and is settled at the bottom of the first chamber under the action of a gravity field to form a magnetic mud layer; thereby make the separation of magnetic mud and water in the second cavity, and separation efficiency is high, makes sewage reach good purifying effect.

Description

Magnetic mud separator and sewage treatment device

Technical Field

The utility model belongs to the technical field of sewage purification technique and specifically relates to a magnetic mud separator and sewage treatment plant is related to.

Background

The magnetic loading flocculation technology is widely applied in the field of sewage purification, and specifically comprises the steps of adding a coagulant, a coagulant aid and magnetic seeds into sewage to flocculate impurities in the sewage and combine the impurities with the magnetic seeds to form magnetic mud; then, the magnetic mud is adsorbed by a magnetic part placed in the sewage, and finally, the magnetic mud is separated from the magnetic part by a removing device so as to purify the sewage; but the magnetic mud adsorbed on the magnetic part is difficult to be thoroughly removed, thereby causing poor sewage purification effect.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a magnetic mud separator and sewage treatment plant to it is not good to solve among the prior art magnetic mud desorption effect, the not good technical problem of sewage purification effect.

The utility model provides a magnetic mud separator, which comprises a separation chamber, an isolation cylinder, a magnetic part and a driving part; a first chamber and a second chamber are formed in the separation chamber; the isolating cylinder is located in the second cavity, the magnetic part is located in the isolating cylinder, the magnetic part can attract the magnetic mud in the sewage in the second cavity to be close to the outer wall of the isolating cylinder, the driving part can drive the magnetic part to move so as to be close to the outer wall of the isolating cylinder, and the magnetic mud is conveyed to the first cavity.

Further, a partition plate is arranged on the bottom wall of the separation chamber, and divides the separation chamber into the first chamber and the second chamber; one end of the isolating plate, which is far away from the bottom wall of the separating chamber, is connected with one end of the isolating cylinder, which is close to the first chamber.

Furthermore, a feed inlet is formed in the side wall of the first chamber, sewage enters the first chamber through the feed inlet and overflows into the second chamber through the first chamber.

Furthermore, a water outlet is formed in the bottom wall of the second chamber and is located on one side, close to the partition plate, of the bottom wall of the second chamber.

Further, a sludge discharge port is formed in the bottom wall of the first chamber.

Furthermore, a settling tank is arranged in the first chamber; the opening of the settling tank is gradually reduced along the vertical direction, one end of the settling tank is a large-diameter end, and the outer wall of the large-diameter end is connected with the outer wall of the first chamber; the other end of the settling tank is a small-caliber end which is communicated with the sludge discharge port.

Further, the magnetic part is disc-shaped or circular, and the magnetic part is a permanent magnet or an electromagnet.

The utility model also provides a sewage treatment device, which comprises the mud separator, the coagulation device, the magnetic mixing device and the flocculation device; the coagulation device, the magnetic mixing device, the flocculator and the magnetic mud separator are communicated in sequence.

Further, the device also comprises a magnetic reclaimer, wherein a magnetic mud inlet of the magnetic reclaimer is communicated with the mud discharge port, and a magnetic powder outlet of the magnetic reclaimer is communicated with the magnetic mixer.

Further, stirring devices are arranged in the coagulation device, the magnetic mixing device and the flocculator.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model provides a magnetic mud separator, which comprises a separation chamber, an isolation cylinder, a magnetic part and a driving part;

a first cavity and a second cavity are formed in the separation chamber, the isolation cylinder is positioned in the second cavity, the magnetic part is positioned in the isolation cylinder, and the magnetic part can be isolated from sewage and magnetic mud in the sewage through the isolation cylinder; but the magnetic mud in the sewage can be attracted to the position close to the outer wall of the isolation cylinder by virtue of the magnetic force of the magnetic piece; the driving piece can drive the magnetic piece to move, so that the magnetic mud close to the outer wall of the isolation cylinder is conveyed into the first cavity; thereby separating the sludge in the second chamber from the water, and the separation efficiency is high, thereby leading the sewage to achieve good purification effect.

The utility model also provides a sewage treatment device, which comprises the magnetic mud separator, the coagulation device, the magnetic mixing device and the flocculation device; the coagulator, the magnetic mixer, the flocculator and the magnetic mud separator are communicated in sequence; sewage to be purified sequentially passes through the coagulation device, the magnetic mixer and the flocculator and enters the magnetic mud separator, the sewage is sequentially mixed with a coagulant in the coagulation device, a magnetic seed in the magnetic mixer and a coagulant aid in the flocculator, pollutants such as suspended matters, oil substances, bacteria, algae and the like in the sewage are combined with the magnetic seed to form magnetic mud, then the magnetic mud enters the magnetic mud separator along with the sewage, and the magnetic mud is separated from the sewage under the action of magnetic force of the magnetic element to obtain the purified sewage.

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

Fig. 1 is a schematic structural diagram of a magnetic mud separator according to an embodiment of the present invention;

fig. 2 is a schematic structural view of a sewage treatment device provided by the embodiment of the utility model.

Reference numerals:

1-a first chamber, 11-a separation plate, 12-a mud discharge port, 2-a second chamber, 21-a separation cylinder, 22-a magnetic part, 23-a water discharge port, 3-a settling tank, 4-a coagulation device, 5-a magnetic mixer, 6-a flocculation device, 7-a magnetic recovery device, and a-a first direction.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention.

The components of the embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention.

Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

A sludge magnetic separator and a sewage treatment apparatus according to some embodiments of the present application will be described with reference to fig. 1 to 2.

The application provides a magnetic mud separator, which comprises a separation chamber, an isolation cylinder 21, a magnetic part 22 and a driving part, wherein the separation chamber is arranged in the separation chamber; a first chamber 1 and a second chamber 2 are formed in the separation chamber; an isolation cylinder 21 is located second chamber 2, and magnetic part 22 is located isolation cylinder 21, and magnetic part 22 can attract the magnetic mud in the sewage in second chamber 2 to the outer wall department that is close to isolation cylinder 21, and the driving piece can drive magnetic part 22 and move to carry the magnetic mud that is close to the outer wall department of isolation cylinder 21 to first chamber 1 in.

The magnetic mud separator provided by the application comprises a separation chamber, an isolation cylinder 21, a magnetic part 22 and a driving part; impurities in the sewage to be purified are flocculated and combined with magnetic seeds to form magnetic flocs, namely magnetic mud, and then the magnetic flocs enter a separation chamber to separate the magnetic mud from water; wherein a first chamber 1 and a second chamber 2 are formed in the separation chamber, the isolation cylinder 21 is positioned in the second chamber 2, the magnetic part 22 is positioned in the isolation cylinder 21, and the magnetic part 22 can be isolated from sewage and magnetic mud in the sewage through the isolation cylinder 21; but the magnetic mud in the sewage can be attracted to the outer wall close to the isolation cylinder 21 by means of the magnetic force of the magnetic member 22; the driving piece can drive the magnetic piece 22 to move, so that the magnetic mud close to the outer wall of the isolation cylinder 21 is conveyed into the first chamber 1; thereby separating the sludge in the second chamber 2 from the water and realizing the purification of the sewage.

Preferably, the first chamber 1 and the second chamber 2 are arranged side by side, as shown in fig. 1, which is an embodiment showing the case that the first chamber 1 is located at the right side of the second chamber 2, and the flow direction of the sewage and the magnetic mud in the separation chamber will be described by taking such arrangement of the first chamber 1 and the second chamber 2 as an example. The isolation cylinder 21 is located in the second chamber 2, the length direction of the isolation cylinder 21 extends along the second direction, and two ends of the isolation cylinder 21 in the length direction are respectively connected with side walls of two ends of the second chamber 2 along the second direction, that is, the isolation cylinder 21 is transversely arranged in the second chamber 2; the magnetic member 22 is positioned in the isolation cylinder 21, and magnetic mud in the sewage can be attracted to the position close to the outer wall of the isolation cylinder 21 by virtue of the magnetic force generated by the magnetic member 22, so that the magnetic mud is gathered around the isolation cylinder 21, namely close to the outer wall of the isolation cylinder 21; the driving end of the driving member is connected with the magnetic member 22, the magnetic member 22 can be driven to rotate along the first direction a by the driving member, and the rotation axis of the magnetic member extends along the second direction, namely, the magnetic member 22 can rotate in the clockwise direction; with the rotation of the magnetic member 22, under the action of the magnetic force, the magnetic mud in the sewage will also rotate clockwise, and finally rotate into the first chamber 1 on the right side; the magnetic mud entering the first chamber 1 cannot rotate back to the second chamber 2, and is settled at the bottom of the first chamber 1 under the action of gravity to form a magnetic mud layer; along with the continuous rotation of magnetic part 22, the magnetic mud in the sewage in the second chamber 2 is constantly driven to the first chamber 1, makes magnetic mud and water in the sewage in the second chamber 2 realize the separation, and separation efficiency is high to make sewage reach good purifying effect.

It should be noted that, the magnetic mud separator of the present application does not need to completely adsorb the magnetic mud in the sewage to the outer wall of the isolation cylinder 21 that is sleeved outside the magnetic member 22, and only needs to rely on the magnetic force of the magnetic member 22 to attract the magnetic mud to the outer wall near the isolation cylinder 21, and when the magnetic member 22 rotates along the first direction a, the magnetic mud can flow around the isolation cylinder 21 along the first direction a in the sewage, so that the magnetic mud flows clockwise from the second chamber 2 to the first chamber 1 under the action of the magnetic force. The magnetic mud entering the first chamber 1 can not return to the second chamber 2 under the action of the magnetic force due to the obstruction between the two chambers, and is separated from the acting force of the magnetic member 22 in the isolation cylinder 21 and deposited on the bottom of the first chamber 1; therefore, the magnetic mud separator can effectively realize the separation of magnetic mud and water, has higher separation efficiency and enables sewage to be well purified.

Preferably, the centers of the two ends of the magnetic member 22 along the second direction are both provided with a rotating shaft, the rotating shafts are coaxially arranged with the rotating axis of the magnetic member 22, and the rotating shafts at the two ends both extend out of the second chamber 2, and then the rotating shafts at the two ends are respectively rotatably connected with a bearing seat fixedly arranged on the outer side of the second chamber 2, so that the magnetic member 22 can rotate around the rotating axis; the driving member is disposed outside the separation chamber, and a driving end of the driving member is connected to the rotating shaft at one end, so as to drive the magnetic member 22 to rotate along the first direction a.

It should be noted that the first chamber 1 may also be located on the left side of the second chamber 2, so that the sewage overflows into the second chamber 2 on the right side through the first chamber 1 on the left side, and correspondingly, the rotation direction of the magnetic member 22 should be counterclockwise, so that the magnetic mud in the second chamber 2 rotates counterclockwise into the first chamber 1, thereby realizing the separation of the magnetic mud and the water in the second chamber 2.

In one embodiment of the present application, preferably, as shown in fig. 1, a partition plate 11 is disposed on the bottom wall of the separation chamber, and the partition plate 11 divides the separation chamber into a first chamber 1 and a second chamber 2; the end of the partition plate 11 remote from the bottom wall of the separation chamber is connected to the end of the separation cylinder 21 close to the first chamber 1.

In this embodiment, the bottom wall of the separation chamber is provided with a partition plate 11, the partition plate 11 is vertically placed, and two ends of the partition plate 11 along the second direction are respectively connected with the side walls at two ends of the separation chamber, so that the separation chamber is divided into a left chamber and a right chamber, namely a second chamber 2 and a first chamber 1; one end of the isolation plate 11 far away from the bottom wall extends upwards and is connected with one end of the isolation cylinder 21 close to the first chamber 1; therefore, sewage in the first chamber 1 can only bypass the upper part of the isolation cylinder 21 to enter the second chamber 2, and magnetic mud in the second chamber 2 can only rotate clockwise around the isolation cylinder 21 to enter the first chamber 1 by bypassing the isolation cylinder 21; the magnetic mud falling into the first chamber 1 cannot continuously flow back into the second chamber 2 under the action of the magnetic force of the magnetic member 22 due to the blocking of the partition plate 11, and is gradually accumulated in the first chamber 1 and gradually deposited at the bottom of the first chamber 1 under the action of the gravitational field to form a magnetic mud layer. Along with the rotation of the magnetic member 22, the magnetic mud in the second chamber 2 is continuously driven into the first chamber 1, so that the separation of the magnetic mud and water in the sewage in the second chamber 2 is realized, and the sewage is well purified.

In one embodiment of the present application, preferably, as shown in fig. 1, the water outlet 23 is provided on the bottom wall of the second chamber 2, and the water outlet 23 is located on one side of the bottom wall of the second chamber 2 close to the partition plate 11.

In this embodiment, the drain opening 23 is provided on the bottom wall of the second chamber 2; the isolation cylinder 21 and the magnetic member 22 are located in the second chamber 2, and due to the magnetic force of the magnetic member 22, the magnetic mud in the second chamber 2 is attracted to the outer wall of the isolation cylinder 21 and is gathered at the position close to the isolation cylinder 21, and the content of the magnetic mud in the sewage is less at the position far from the isolation cylinder 21, such as the bottom wall of the second chamber 2, so that the water quality is cleaner, and therefore, the water outlet 23 is arranged on the bottom wall of the second chamber 2 far from the isolation cylinder 21 and the magnetic member 22, so that the purified sewage in the second chamber 2 is discharged through the water outlet 23.

Preferably, a feed inlet is arranged on the side wall of the first chamber 1, and sewage enters the separation chamber through the feed inlet; the water outlet 23 is positioned on one side of the bottom wall of the second chamber 2 close to the partition plate 11;

firstly, sewage enters the first chamber 1 through the feeding hole, the sewage continuously enters, the water level of the sewage is higher than that of the isolation cylinder 21, and then the sewage bypasses the isolation cylinder 21 and enters the second chamber 2; with the continuous inflow of the sewage, the second chamber 2 is filled, and finally the liquid level of the sewage in the separation chamber submerges the isolation cylinder 21, so that the water discharge of the water inflow of the sewage is controlled, and the liquid level of the sewage is kept higher than the isolation cylinder 21. Meanwhile, in the process of purifying the sewage in the separation chamber, the magnetic member 22 rotates clockwise from left to right along the first direction a, and the flow direction of the sewage enters from the first chamber 1 on the right side and is discharged through the second chamber 2 on the left side, i.e. the flow direction of the water is opposite to the rotation direction of the magnetic member 22; under the action of the magnetic force of the magnetic member 22, the magnetic mud in the sewage also rotates in the first direction a, that is, the flow direction of the magnetic mud is opposite to the flow direction of the sewage, so that the magnetic mud and the water are better separated; the water outlet 23 is arranged at one side of the bottom of the second chamber 2 close to the partition board 11, namely the water outlet 23 is arranged at the right side of the second chamber 2, the content of magnetic mud in sewage is lower, and the water quality is better, so that the water quality of water discharged through the water outlet 23 is ensured, and the purification standard is reached.

In one embodiment of the present application, preferably, as shown in fig. 1, a sludge discharge port 12 is provided on the bottom wall of the first chamber 1.

In this embodiment, the sludge discharge port 12 is provided on the bottom wall of the first chamber 1; with the continuous clockwise rotation from left to right of the magnetic part 22, the magnetic mud in the second chamber 2 is continuously guided into the first chamber 1 under the action of magnetic force, is deposited at the bottom of the first chamber 1 under the action of a gravitational field, and is continuously discharged through the mud discharge port 12 at the bottom of the first chamber 1, so that the first chamber 1 can continuously receive the magnetic mud from the second chamber 2, and the continuous operation of sewage purification operation is ensured.

In one embodiment of the present application, preferably, as shown in fig. 1, a settling tank 3 is provided in the first chamber 1; the cross section of the settling tank 3 is conical, one end of the settling tank 3 is a large-caliber end, and the outer wall of the large-caliber end is connected with the outer wall of the first chamber 1; the other end of the settling tank 3 is a small-caliber end which is communicated with a sludge discharge port 12.

In this embodiment, a settling tank 3 is arranged in the first chamber 1, the settling tank 3 is conical, the upper end and the lower end of the settling tank 3 are both open sections, the upper end is a large-diameter end, and the lower end is a small-diameter end; the large-caliber end of the settling tank 3 is communicated with the upper open end of the first chamber 1, so that the magnetic mud from the second chamber 2 can fall into the settling tank 3 through the large-caliber end; the small-caliber end of the settling tank 3 is communicated with a sludge discharge port 12 of the first chamber 1, so that the settled magnetic sludge can be discharged; through setting up the subsider 3 into the toper, can accelerate the settling velocity of magnetic mud, make the below that the magnetic mud subsides 3 to the subsider fast, reduce the settlement time.

In one embodiment of the present application, preferably, as shown in fig. 1, the magnetic member 22 has a disk shape, and the magnetic member 22 is a permanent magnet or an electromagnet.

In this embodiment, the magnetic member 22 has a disk shape and a certain thickness in the third direction; the magnetic member 22 is a permanent magnet or an electromagnet, and the magnetic force generated by the magnetic member can act on the magnetic mud and guide the magnetic mud to rotate along with the magnetic mud.

The application also provides a sewage treatment device, as shown in figure 2, comprising the magnetic mud separator, the coagulation device 4, the magnetic mixing device 5 and the flocculator 6 of any one of the embodiments; the coagulation device 4, the magnetic mixing device 5, the flocculator 6 and the magnetic mud separator are communicated in sequence.

In this embodiment, the sewage treatment device includes the magnetic mud separator, so the sewage treatment device has all the beneficial effects of the magnetic mud separator, and the detailed description is omitted here.

The sewage treatment device also comprises a coagulation device 4, a magnetic mixing device 5 and a flocculator 6; the coagulation device 4, the magnetic mixer 5, the flocculator 6 and the magnetic mud separator are communicated in sequence, sewage to be purified sequentially passes through the coagulation device 4, the magnetic mixer 5 and the flocculator 6 to enter the magnetic mud separator, and the sewage is sequentially mixed with a coagulant in the coagulation device 4, a magnetic seed in the magnetic mixer 5 and a coagulant aid in the flocculator 6, so that pollutants such as suspended matters, oil substances, bacteria, algae and the like in the sewage are combined with the magnetic seeds to form magnetic floccules, namely magnetic mud, and then enters the magnetic mud separator along with the sewage, and the magnetic mud is separated from the sewage under the action of the magnetic force of the magnetic part 22 to obtain the purified sewage.

In one embodiment of the present application, preferably, as shown in fig. 2, the sewage treatment device further comprises a magnetic recycling device 7, a magnetic sludge inlet of the magnetic recycling device 7 is communicated with the sludge discharge port 12, and a magnetic powder outlet of the magnetic recycling device 7 is communicated with the magnetic mixer 5.

In the embodiment, the sewage treatment device further comprises a magnetic recycling device 7, the magnetic recycling device 7 comprises a magnetic mud inlet, a magnetic powder outlet and a sludge discharge port, the magnetic mud inlet of the magnetic recycling device 7 is communicated with the sludge discharge port 12 of the first chamber 1 of the magnetic mud separator, the magnetic mud separated by the magnetic mud separator can enter the magnetic recycling device 7 to separate magnetic seeds from sludge, the magnetic powder outlet of the magnetic recycling device 7 is communicated with the magnetic mixer 5, and the separated magnetic seeds are conveyed into the magnetic mixer 5 through the magnetic powder outlet of the magnetic recycling device 7 to be recycled; the separated sludge is discharged through a sludge discharge port of the magnetic recovery unit 7.

In one embodiment of the present application, it is preferable that stirring devices are provided in the internal parts of the coagulation vessel 4, the magnetic mixer 5 and the flocculator 6, as shown in fig. 2.

In the embodiment, stirring devices are arranged in the coagulation device 4, the magnetic mixer 5 and the flocculator 6, so that the sewage can be fully mixed with the coagulant, the magnetic seeds and the coagulant aid in the coagulation device 4, the magnetic mixer 5 and the flocculator 6 respectively; pollutant in the sewage can be fully flocculated and fully combined with the magnetic seeds to form magnetic flocs, so that the pollutant in the sewage can be more fully separated, and a better purification effect is achieved.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims (10)

1. A magnetic mud separator is characterized by comprising a separation chamber, an isolation cylinder, a magnetic part and a driving part;

a first chamber and a second chamber are formed in the separation chamber; the isolating cylinder is located in the second cavity, the magnetic part is located in the isolating cylinder, the magnetic part can attract the magnetic mud in the sewage in the second cavity to be close to the outer wall of the isolating cylinder, the driving part can drive the magnetic part to move so as to be close to the outer wall of the isolating cylinder, and the magnetic mud is conveyed to the first cavity.

2. The magnetic mud separator according to claim 1, wherein a partition plate is provided on a bottom wall of the separation chamber, the partition plate dividing the separation chamber into the first chamber and the second chamber; one end of the isolating plate, which is far away from the bottom wall of the separating chamber, is connected with one end of the isolating cylinder, which is close to the first chamber.

3. The magnetic mud separator according to claim 2, wherein a feed inlet is formed in a side wall of the first chamber, and sewage enters the first chamber through the feed inlet and overflows into the second chamber through the first chamber.

4. The magnetic mud separator of claim 3, wherein a drain port is provided in the bottom wall of the second chamber, and the drain port is located on a side of the bottom wall of the second chamber adjacent to the partition plate.

5. A magnetic mud separator according to claim 4, wherein a mud discharge port is provided in the bottom wall of the first chamber.

6. A magnetic mud separator according to claim 5 wherein a settling tank is provided within the first chamber;

the notch of the settling tank is gradually reduced along the vertical direction; one end of the settling tank is a large-caliber end, and the outer wall of the large-caliber end is connected with the outer wall of the first chamber; the other end of the settling tank is a small-caliber end which is communicated with the sludge discharge port.

7. The magnetic mud separator according to claim 5, wherein the magnetic member is in the shape of a disk or a ring, and the magnetic member is a permanent magnet or an electromagnet.

8. A sewage treatment plant comprising the magnetic sludge separator, the coagulation device, the magnetic mixing device and the flocculator according to any one of claims 5 to 7;

the coagulation device, the magnetic mixing device, the flocculator and the magnetic mud separator are communicated in sequence.

9. The sewage treatment device according to claim 8, further comprising a magnetic reclaimer, wherein a magnetic sludge inlet of the magnetic reclaimer is communicated with the sludge discharge port, and a magnetic powder outlet of the magnetic reclaimer is communicated with the magnetic mixer.

10. The wastewater treatment apparatus according to claim 8, wherein stirring devices are disposed in the coagulation vessel, the magnetic mixer and the flocculator.

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