CN116943859A

CN116943859A - Electromagnetic filter, use method thereof and steel cleaning system

Info

Publication number: CN116943859A
Application number: CN202310845220.3A
Authority: CN
Inventors: 裴艳兰; 李路
Original assignee: Wisdri Engineering and Research Incorporation Ltd
Current assignee: Wisdri Engineering and Research Incorporation Ltd
Priority date: 2023-07-11
Filing date: 2023-07-11
Publication date: 2023-10-27

Abstract

The invention relates to an electromagnetic filter and a use method thereof, wherein the electromagnetic filter comprises a filter tank, a filter disc and an impurity collector, the filter disc comprises an annular bracket, a plurality of electromagnetic chucks and an electric control unit for controlling each electromagnetic chuck to obtain power failure, each electromagnetic chuck is arranged on the annular bracket and is sequentially distributed in an annular manner along the circumferential direction of the annular bracket, and the annular bracket is provided with a rotary driving mechanism for driving the rotary driving mechanism to rotate; the annular bracket is partially located in the filter tank, and the impurity collector is disposed outside the filter tank and includes an impurity removing portion for driving impurities away from the electromagnetic chuck. And a steel material cleaning system provided with the electromagnetic filter. The electromagnetic filter is reliable in operation, and the electromagnetic chuck is adopted to ensure enough adsorption surface area and high adsorption efficiency. For the steel cleaning system, cleaning liquid can be filtered on line, so that the service time of the cleaning liquid is obviously prolonged, the cleaning quality of steel is improved, and the shutdown maintenance frequency is reduced.

Description

Electromagnetic filter, use method thereof and steel cleaning system

Technical Field

The present invention relates to an electromagnetic filter, a method of using the same, and a steel cleaning system provided with the electromagnetic filter.

Background

Heavy oil, iron mud and other impurities often remain on the coiled sheet rolled by the rolling mill, and when the impurities are subjected to the next process, alkali cleaning is required, so that the cleaned oil mud impurities can fall into the bottom of the alkali tank with the lowest relative elevation. Because the production line production is not stopped, the tank bottom is not easy to clean in real time, and the tank bottom can only be cleaned when the machine is stopped for maintenance, the tank bottom is difficult to clean due to excessive deposited sludge, or sewage with excessive impurities is sent to the next circulation in the production process, and the strip steel cleaning quality of the production line is affected.

Disclosure of Invention

The invention relates to an electromagnetic filter, a use method thereof and a steel cleaning system provided with the electromagnetic filter, which at least can solve part of defects in the prior art.

The invention relates to an electromagnetic filter, which comprises a filter tank, a filter disc and an impurity collector,

the filter disc comprises an annular support, a plurality of electromagnetic chucks and an electric control unit for controlling the electromagnetic chucks to be powered off, wherein the electromagnetic chucks are arranged on the annular support and are sequentially distributed in an annular manner along the circumferential direction of the annular support, and the annular support is provided with a rotary driving mechanism for driving the annular support to rotate;

the annular bracket is partially located in the filter tank, and the impurity collector is disposed outside the filter tank and includes an impurity removing portion for driving impurities away from the electromagnetic chuck.

As one of the implementation modes, the electric control unit comprises a plurality of electric control cables and electric control modules, the electric control cables and the electromagnetic chucks are in same number and are in one-to-one correspondence connection, and each electric control cable is electrically connected with the electric control module.

As one of the implementation modes, the annular support is connected with the rotary driving mechanism through a support rotating shaft, the support rotating shaft is a hollow shaft, and each electric control cable is routed through the hollow cavity of the support rotating shaft.

As one of the implementation manners, the electric control module comprises a central controller and conductive slip rings, each electric control cable is connected with a rotor part of each conductive slip ring, and the central controller is connected with a stator part of each conductive slip ring.

As one of the embodiments, the annular bracket is connected with the rotation driving mechanism through a bracket rotating shaft; the filter disc further comprises a water retaining ring which is coaxially arranged on the support rotating shaft and is abutted against the disc surface of each electromagnetic chuck, an annular water retaining edge is formed on the outer annular wall of the water retaining ring in a protruding mode, and the annular water retaining edge and each electromagnetic chuck are enclosed to form a water retaining groove.

As one embodiment, the water retaining rings are two and are arranged on two sides of the annular bracket.

As one embodiment, the impurity removing unit includes a scraper whose working end is in contact with a disk surface of the electromagnetic chuck at the impurity collecting site; the impurity collector also comprises an impurity collecting tank, and the impurity collecting tank is connected to the lower part of the scraper.

As one of implementation modes, the filter discs are provided with a plurality of groups, the annular supports are sequentially arranged on the same support rotating shaft, and the support rotating shaft is connected with the rotary driving mechanism.

The invention also relates to a use method of the electromagnetic filter, which comprises the following steps:

the annular bracket drives each electromagnetic chuck to rotate, so that the electromagnetic chuck circularly moves among a working position, a dewatering position and an impurity removing position,

in the working position, the electromagnetic chuck is powered and at least partially immersed in the filter tank to adsorb ferromagnetic impurities in the filter tank;

in the dehydration position, the electromagnetic chuck is kept in an electrified state;

in the impurity removal position, the electromagnetic chuck is powered off, and impurities are driven away from the electromagnetic chuck through the impurity removal part and are collected.

The invention also relates to a steel cleaning system which comprises a cleaning tank and a circulating tank, wherein the cleaning tank is connected with the circulating tank through a cleaning liquid supply pipe and a cleaning liquid return pipe, and the electromagnetic filter is arranged on the cleaning liquid return pipe and/or the cleaning liquid supply pipe.

The invention has at least the following beneficial effects:

according to the electromagnetic filter provided by the invention, the annular support drives each electromagnetic chuck to rotate, so that the electromagnetic chucks can circularly and reciprocally enter the filter tank to perform adsorption and filtration operations and collect adsorbed impurities at the impurity collector, and the operation is reliable; the electromagnetic chuck is adopted, so that enough adsorption surface area can be ensured, and the adsorption efficiency is high.

According to the steel cleaning system provided by the invention, the electromagnetic filter is arranged on the cleaning liquid return pipe and/or the cleaning liquid supply pipe, so that the cleaning liquid can be filtered on line, the service time of the cleaning liquid is obviously prolonged, the cleaning quality of steel is improved, and the shutdown maintenance frequency is reduced.

Drawings

In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic side view of an electromagnetic filter according to an embodiment of the present invention;

fig. 2 is a schematic top view of an electromagnetic filter according to an embodiment of the present invention;

fig. 3 is a schematic front view of an electromagnetic filter according to an embodiment of the present invention;

FIG. 4 is a schematic diagram of a system for treating iron sludge according to an embodiment of the present invention;

FIG. 5 is a top view of FIG. 4;

fig. 6 is a schematic structural diagram of an iron mud collecting box according to an embodiment of the present invention.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely, and it is apparent that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Example 1

As shown in fig. 1 to 3, an embodiment of the present invention provides an electromagnetic filter 1, including a filter tank 11, a filter disc 12 and an impurity collector 13, where the filter disc 12 includes an annular bracket 121, a plurality of electromagnetic chucks 122, and an electric control unit for controlling each electromagnetic chuck 122 to lose electricity, each electromagnetic chuck 122 is mounted on the annular bracket 121 and distributed annularly in turn along the circumferential direction of the annular bracket 121, and the annular bracket 121 is configured with a rotation driving mechanism 15 for driving the rotation of the annular bracket 121; the ring-shaped holder 121 is partially located in the filtering tank 11, and the impurity collector 13 is disposed outside the filtering tank 11 and includes an impurity removing portion for driving impurities away from the electromagnetic chuck 122.

In one embodiment, the annular support 121 includes an inner ring frame and an outer ring frame, which are connected by a plurality of spokes, each spoke correspondingly dividing an annular region between the inner ring frame and the outer ring frame into a plurality of chuck mounting locations, each chuck mounting location having an electromagnetic chuck 122 mounted thereon.

Wherein, optionally, as shown in fig. 1, the spokes are distributed along the radial direction of the annular support 121, the inner ring frame-spoke-outer ring frame connection is formed in a hub shape.

Electromagnetic chuck 122 is preferably removably mounted to annular support 121, including but not limited to, by bolting, etc.

The surface of the electromagnetic chuck 122 is preferably coplanar with the corresponding side surface of the annular bracket 121, so that impurities on the electromagnetic chuck 122 can be removed conveniently, and dirt can be prevented from being trapped due to the fact that corners are formed between the electromagnetic chuck 122 and the annular bracket 121.

Preferably, the annular support 121 is connected to the rotary driving mechanism 15 through a support rotating shaft 14, and the rotary driving mechanism 15 drives the support rotating shaft 14 to rotate, so as to drive the annular support 121 and the electromagnetic chuck 122 on the annular support 121 to rotate.

In one embodiment, the rotary driving mechanism 15 adopts a structure of a motor and a transmission assembly, and the transmission assembly can adopt a mode of sprocket transmission, belt pulley transmission and the like; the motor is preferably a variable frequency motor, and the rotation speed of the annular bracket 121 can be controlled.

Preferably, the electric control unit includes a plurality of electric control cables and electric control modules, the electric control cables are connected with the electromagnetic chucks 122 in the same number and in a one-to-one correspondence manner, and each electric control cable is electrically connected with the electric control module.

In one embodiment, the support shaft 14 is a hollow shaft, and each of the electric control cables is routed through the hollow cavity of the support shaft 14. The mode can facilitate the layout of the electric control cable, and has high safety and reliability. Preferably, a wiring hole is formed on the annular bracket 121 (for example, the inner ring frame) so as to facilitate the electric control cable to enter the bracket rotating shaft 14; a routing channel is also provided in the electromagnetic chuck 122 to connect the electrical control cable with the coil in the electromagnetic chuck 122.

Preferably, the annular bracket 121 is detachably mounted on the bracket rotation shaft 14. In one embodiment, the stent rotor shaft 14 is of segmented design, with the ring stent 121 being clamped between the two rotor shaft segments 141 of the stent rotor shaft 14 (typically the inner ring stent is clamped between the two rotor shaft segments 141 of the stent rotor shaft 14); optionally, a shoulder is machined on the rotating shaft segment 141, two ends of the inner hole of the inner ring frame respectively adopt a stepped hole structure, the journal portion at the end of the rotating shaft segment 141 is inserted into the large-diameter hole segment in the corresponding side stepped hole structure, and the shoulder portion of the rotating shaft segment 141 is abutted with the corresponding side end face of the inner ring frame and fixed by screws.

Further, when the rotating shaft segment 141 is assembled with the inner ring frame, the electromagnetic chuck 122 may be further clamped between the two, for example, the outer ring wall of the inner ring frame adopts a stepped shaft structure, a clamping groove is formed between the shoulder of one rotating shaft segment 141 and the large diameter wall body of the stepped shaft type outer ring wall, and the corresponding side end of the electromagnetic chuck 122 is clamped in the clamping groove. This way can improve the stability and reliability of the installation of electromagnetic chuck 122, especially when the electric control cable needs to get into electromagnetic chuck 122 via support pivot 14, the alignment accuracy between the wiring hole on annular support 121 and the wiring channel in electromagnetic chuck 122 can be guaranteed to the above-mentioned structure to avoid electric control cable to appear trouble such as damage.

In one embodiment, the electronic control module comprises a central controller and an electrically conductive slip ring, each electronic control cable is connected with a rotor part of the electrically conductive slip ring, and the central controller is connected with a stator part of the electrically conductive slip ring. The rotor part of the conductive slip ring is preferably mounted on the bracket rotating shaft 14. With this structure, in the case where the electromagnetic chucks 122 normally rotate, reliable control of the power supply/removal of each electromagnetic chuck 122 can be ensured.

Such central controllers include, but are not limited to, PLC controllers.

When the annular bracket 121 drives each electromagnetic chuck 122 to rotate, part of the electromagnetic chucks 122 are immersed into the filter tank 11 from outside the filter tank 11, and part of the electromagnetic chucks 122 leave the filter tank 11 and swing upwards; for the electromagnetic chuck 122 arranged upwards, ferromagnetic impurities are adsorbed on the surface of the electromagnetic chuck 122, and the carried liquid and the liquid in the adsorbed impurities can leave the electromagnetic chuck 122 under the action of gravity, so that the effect of gravity dehydration can be achieved, the water content of the impurities collected in the impurity collector 13 is low, the subsequent treatment of the impurities is convenient, and the loss of the liquid in the filter tank 11 can be reduced.

In one embodiment, as shown in fig. 2 and 3, the filter disc 12 further includes a water blocking ring 123, where the water blocking ring 123 is coaxially installed on the support shaft 14 and abuts against the disc surface of each electromagnetic chuck 122, and an annular water blocking edge is formed on an outer annular wall of the water blocking ring 123 in a protruding manner, and the annular water blocking edge and each electromagnetic chuck 122 enclose to form a water blocking groove. By arranging the water blocking ring 123, the liquid can be well guided, and the liquid is prevented from entering the bracket rotating shaft 14 and other places to influence the normal operation of the electric control unit.

Among them, it is preferable that the water blocking rings 123 are provided in two and are arranged on both sides of the ring-shaped supporter 121.

Preferably, a sealing gasket is sandwiched between the water retaining ring 123 and the electromagnetic chuck 122, so as to improve the water retaining effect.

In the impurity collecting station, the method of scraping the impurities on the surface of the electromagnetic chuck 122 can be adopted, and the method of flushing the surface of the electromagnetic chuck 122 by high-pressure water or high-pressure air can be adopted.

In one embodiment, as shown in fig. 1-3, the impurity removing unit includes a scraper 131, and a working end of the scraper 131 contacts with a disk surface of the electromagnetic chuck 122 at the impurity collecting position; the impurity collector 13 further includes an impurity collecting tank 132, and the impurity collecting tank 132 is engaged under the scraper 131. The mode has low energy consumption and high working reliability.

Generally, since both side surfaces of the electromagnetic chuck 122 can absorb foreign matters, it is preferable to provide the scraper 131 and the foreign matter collecting groove 132 on both sides of the ring-shaped bracket 121, respectively; the distance between the working ends of the both side scrapers 131 is preferably the same as the thickness of the electromagnetic chuck 122.

Preferably, as shown in fig. 2 and 3, the above-mentioned scraper 131 is arranged obliquely, so that scraped foreign matters can be easily dropped into the foreign matter collecting tank 132.

Alternatively, the working end of the above-mentioned scraper 131 is a tip end thereof, which is preferably parallel to a horizontal plane, that is, a contact line of the scraper 131 with the electromagnetic chuck 122 is parallel to the horizontal plane, which can facilitate the arrangement of the scraper 131, the impurity collecting tank 132, etc., and the collection of impurities.

Preferably, the scraper 131 is a trough plate, and the scraper 131 is defined in a direction from the working end to the impurity collecting trough 132, so that wing plates are respectively formed at two lateral ends of the scraper 131 in an extending manner, so as to better restrict and guide scraped impurities.

As a preferable solution of this embodiment, as shown in fig. 2 and 3, the filter disc 12 has a plurality of groups, each of the annular brackets 121 is sequentially mounted on the same bracket rotating shaft 14, and the bracket rotating shaft 14 is connected to the rotation driving mechanism 15. The filter discs 12 are arranged in a plurality of groups, so that the filtering efficiency and the filtering effect can be improved.

As shown in fig. 2, one impurity collection trough 132 may be shared between two adjacent filter discs 12.

Preferably, as shown in fig. 2, a plurality of partitions are provided in the filter tank 11, each partition dividing the filter tank 11 into a plurality of liquid storage tanks 111, and each liquid storage tank 111 is preferably provided with a filter disc 12; wherein the number of the filter discs 12 and the liquid storage tanks 111 is preferably the same and arranged in a one-to-one correspondence.

In one embodiment, upstream wastewater may be simultaneously introduced into each of the reservoirs 111.

In other embodiments, the tanks 111 may be sequentially connected in series, the upstream sewage first enters the first tank 111, and the sewage circulates between the upstream tank 111 and the downstream tank 111 in an overflow manner, so that the sewage can be treated in a pipeline manner, continuous treatment can be realized, and the treatment effect and efficiency can be ensured. As shown in fig. 2, in the first-stage liquid storage tank 111, the filter disc 12 is preferably arranged close to the sewage inlet, so that ferromagnetic impurities in the sewage can be captured at the first time, and the electromagnetic filtering effect is improved; in the tail section sump 111, the filter disc 12 is preferably arranged close to the filtrate outlet, so that the cleanliness of the discharged filtrate can be improved.

In particular, based on the above-described segmented design of the support shaft 14, the installation and arrangement of the individual filter discs 12 can be facilitated; the number of the filter discs 12 can be increased or decreased as required, so that the flexibility is very high; and the maintenance of the equipment can be facilitated, for example, the disassembly and assembly of the filter disc 12 at the corresponding liquid storage tank 111 can be carried out, and the filter treatment in other liquid storage tanks 111 is not affected.

The use method of the electromagnetic filter 1 comprises the following steps:

the electromagnetic chucks 122 are driven to rotate by the annular bracket 121, so that the electromagnetic chucks 122 can circularly move among the working position, the water removal position and the impurity removal position,

in the working position, the electromagnetic chuck 122 is powered and at least partially immersed in the filter tank 11, adsorbing ferromagnetic impurities in the filter tank 11;

in the dehydration position, electromagnetic chuck 122 remains powered;

in the impurity removal position, the electromagnetic chuck 122 is de-energized, and impurities are driven off from the electromagnetic chuck 122 by the impurity removal unit and collected.

Example two

The embodiment provides a steel cleaning system, which comprises a cleaning tank and a circulating tank 4, wherein the cleaning tank is connected with the circulating tank 4 through a cleaning liquid supply pipe and a cleaning liquid return pipe, in particular, the cleaning liquid supply pipe is respectively connected with a cleaning liquid outlet of the circulating tank 4 and a cleaning liquid inlet of the cleaning tank, and the cleaning liquid return pipe is respectively connected with the cleaning liquid inlet of the circulating tank 4 and a cleaning liquid outlet of the cleaning tank.

Further, the electromagnetic filter 1 provided in the first embodiment described above is arranged on the cleaning liquid return pipe and/or the cleaning liquid supply pipe. Based on the scheme, the cleaning liquid can be filtered on line, the service time of the cleaning liquid is obviously prolonged, the cleaning quality of steel is improved, and the shutdown maintenance frequency is reduced.

Further, the circulating tank 4 is provided with an iron mud treatment system for online cleaning iron mud impurities in the circulating tank 4, so that the running stability and reliability of the steel cleaning system and the cleaning quality of steel are improved, and the shutdown dredging time and frequency are reduced.

Wherein the cleaning tank includes, but is not limited to, an alkaline cleaning tank.

Example III

The present embodiment provides an iron slime treatment system, which can be used in the second embodiment.

As shown in fig. 4 and 5, the iron sludge treatment system comprises an intermediate medium circulation mechanism and an iron sludge recovery mechanism, wherein the intermediate medium circulation mechanism comprises a plurality of intermediate mediums 30 capable of extracting iron sludge at the bottom of a circulation tank 4, and a medium conveying unit 31, a medium transferring unit 32 and a medium reflux unit 33 which are sequentially connected, the medium conveying unit 31 is communicated with an intermediate medium outlet of the circulation tank 4, and the medium reflux unit 33 is communicated with an intermediate medium inlet of the circulation tank 4; the iron sludge recycling mechanism includes a flushing unit disposed above the medium relay unit 32 and an iron sludge collecting tank 21 disposed below the medium relay unit 32.

In one embodiment, the intermediate medium 30 includes a steel ball for holding the iron mud, so that the iron mud at the bottom of the container can be conveniently carried out. For the iron mud at the bottom of the container, the iron mud is wrapped by steel balls which flow in a layered manner, and is carried out of the circulating tank 4 through the medium conveying unit 31; when the surface of the medium steel ball is designed to have a certain roughness, the iron mud wrapping effect can be improved, and in one embodiment, the surface roughness Ra of the medium steel ball is more than or equal to 0.8 mu m, and is more preferably controlled to be less than or equal to 12 mu m.

In one embodiment, as shown in fig. 4, a slope is disposed at the bottom of the circulation tank 4, the slope slopes from the middle medium inlet to the middle medium outlet, so that the medium 30 can circulate in the container conveniently, for example, the medium steel balls can run from the middle medium inlet to the middle medium outlet by means of gravity, and the medium steel balls at the high place can squeeze and drive the medium steel balls at the low place and the iron mud on the slope, so that the bottom of the container is ensured to move all the time based on the circulation of the medium steel balls, the iron mud accumulation phenomenon can be reduced, the intervention of power equipment can be saved, and meanwhile, the slope is also beneficial to the deposition of the iron mud to the middle medium outlet so that the middle medium 30 can bring the iron mud out conveniently.

In one embodiment, the above-described medium conveying unit 31 employs a screw pump or a screw conveyor, which may be disposed obliquely or horizontally depending on the relative positional relationship between the intermediate medium outlet and the medium relay unit 32.

In one embodiment, as shown in fig. 4 and 5, the medium relay unit 32 employs a chain conveyor unit, for example, a drag chain conveyor or a chain conveyor. Accordingly, the medium relay unit 32 includes a top link layer 321 and a bottom link layer 322.

Wherein the link plate gap of the chain conveyor unit is smaller than the size of the intermediate medium 30, e.g. smaller than the diameter of the medium steel balls.

The medium conveying unit 31 is connected with the upper chain layer 321, for example, a medium output port of the medium conveying unit 31 is located right above the upper chain layer 321, and the medium conveying unit can convey the medium 30 onto the upper chain layer 321; alternatively, a hopper is arranged above the upper chain layer 321, through which the intermediate medium 30 output from the medium conveying unit 31 is received and transferred onto the upper chain layer 321, and the intermediate medium 30 can be prevented from being ejected out of the upper chain layer 321 due to an excessively large drop distance.

Wherein the medium return unit 33 is arranged at the outlet side of the chain conveyor unit. Optionally, the medium return unit 33 employs a roller conveyor for conveying the cleaned intermediate medium 30 back to the circulation tank 4.

The flushing unit is used for flushing the intermediate medium 30 on the medium transferring unit 32, so that the separation of the iron slime and the intermediate medium 30 can be realized. In one embodiment, as shown in fig. 5, the flushing unit includes a flushing pipe 51, at least one set of spraying structures may be disposed at the bottom of the flushing pipe 51, and when there are multiple sets of spraying structures, the spraying structures are sequentially disposed along the conveying direction of the intermediate medium 30; each set of spray structures includes at least one nozzle, and when there are a plurality of nozzles in the spray structures, the nozzles in the spray structures are preferably arranged in sequence along the width direction of the media relay unit 32.

Further, as shown in fig. 5, the above-mentioned rinsing unit further includes a rinsing liquid supply pipe 52, and the rinsing liquid supply pipe 52 is connected to the rinsing pipe 51 for supplying rinsing liquid. Preferably, the surface water of the circulation tank 4 is used as the rinse liquid, and accordingly, the rinse liquid supply pipe 52 is connected to the upper portion of the circulation tank 4.

The flushing liquid may leave via both sides of the medium relay unit 32 and/or the medium relay unit 32 may be a hollow-out conveyor device, e.g. via the flight gap of the chain conveyor unit described above. In one embodiment, as shown in fig. 4 and 6, the iron sludge recycling mechanism further includes a drainage unit 22, the drainage unit 22 is disposed between the upper chain layer 321 and the lower chain layer 322 of the medium relay unit 32, a top inlet of the drainage unit 22 is located directly below the flushing unit, and a bottom outlet of the drainage unit 22 is located directly above the iron sludge collecting tank 21. Based on the design, the flushing liquid can be reliably drained into the iron mud collecting box 21, so that the field environment is cleaner; at the same time, the flushing water carrying the iron sludge is prevented from polluting the lower chain layer 322, so that the working reliability of the medium transfer unit 32 is correspondingly improved, and the maintenance frequency of the medium transfer unit is reduced.

Preferably, as shown in fig. 4 and 6, the drainage unit 22 has an inverted Y-shaped structure, and forms a drainage inlet pipe and two drainage outlet pipes; the two drainage outlet pipes can ensure the drainage efficiency and effect of flushing liquid on one hand, and on the other hand, the lower chain layer 322 is also convenient to arrange, for example, the lower chain layer 322 is positioned between the two drainage outlet pipes.

The upper chain layer 321 can be arranged in the drainage inlet pipe, so that the intermediate medium 30 and the iron slime splashed by high-pressure jet flow can be well captured.

Preferably, as shown in fig. 4 and 6, the drainage unit 22 and the iron mud collecting tank 21 are connected to form an integral structure, for example, for the drainage unit 22 having an inverted Y-shaped structure, an outer frame 221 thereof and the iron mud collecting tank 21 are integrally formed to form a top-closed tank body, and an inverted V-shaped mud guard 222 is disposed in the tank body to correspondingly form an inner frame of the drainage unit 22.

In one embodiment, a protection net 23 is further disposed around the upper link layer 321 of the medium relay unit 32, and a protection area of the protection net 23 covers at least a flushing area of the upper link layer 321. By providing the protection net 23, the high-pressure jet stream can be prevented from ejecting the intermediate medium 30 out of the medium relay unit 32.

The protection net 23 can perform side protection, optionally, the protection net 23 includes two side wall net plates 231, and the two side wall net plates 231 are separately arranged at two sides of the conveying channel of the medium transfer unit 32; the side screen 231 is preferably not movable with the media relay unit 32, for example, it is mounted by a screen bracket, and for the above-described scheme of providing the drainage unit 22, the side screen 231 may be mounted on the outer frame 221 of the drainage unit 22.

And/or the protection net 23 may be protected from the upper side, optionally, the protection net 23 includes a top net plate 232, and the top net plate 232 is disposed above the medium relay unit 32; the top mesh plate 232 is preferably not movable together with the medium relay unit 32, and its installation method can be used as a reference for the installation method of the side mesh plate 231.

Further optimizing the above-mentioned iron sludge treatment system, as shown in fig. 4 and 5, the iron sludge recycling mechanism further comprises a filtering unit, and the iron sludge collecting tank 21 is provided with a washing liquid recycling pipe connected to the filtering unit.

Alternatively, the filtrate from the filter unit may be reused as flushing liquid, for example, the filtrate outlet pipe of the filter unit may be connected to a flushing liquid reservoir to which the flushing liquid supply pipe 52 is also connected. When the flushing liquid adopts surface water of the circulation tank 4, the filtrate generated by the filtering unit can flow back to the circulation tank 4, and correspondingly, a filtrate outlet pipe of the filtering unit is connected with the circulation tank 4.

Wherein, the iron mud collecting box 21 can adopt overflow mode to control the direction of flushing liquid, and the flushing liquid recycling pipe is connected with the overflow liquid level of the iron mud collecting box 21. Heavier impurities are deposited at the bottom of the iron sludge collection bin 21 and may be cleaned periodically or aperiodically.

In one embodiment, the filtering unit comprises electromagnetic filtering equipment for removing ferromagnetic impurities in the flushing liquid, and the ferromagnetic impurities suspended in the flushing liquid can be reliably adsorbed and removed; the electromagnetic filter device is preferably an electromagnetic filter 1 provided in the first embodiment described above.

The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.

Claims

1. An electromagnetic filter, characterized in that: comprises a filter tank, a filter disc and an impurity collector,

2. An electromagnetic filter as set forth in claim 1, wherein: the electric control unit comprises a plurality of electric control cables and electric control modules, the electric control cables are connected with the electromagnetic chucks in the same number in a one-to-one correspondence mode, and each electric control cable is electrically connected with the electric control module.

3. An electromagnetic filter as set forth in claim 2, wherein: the annular support is connected with the rotary driving mechanism through a support rotating shaft, the support rotating shaft is a hollow shaft, and each electric control cable is routed through a hollow cavity of the support rotating shaft.

4. An electromagnetic filter as set forth in claim 2, wherein: the electric control module comprises a central controller and conductive slip rings, each electric control cable is connected with a rotor part of each conductive slip ring, and the central controller is connected with a stator part of each conductive slip ring.

5. An electromagnetic filter as set forth in claim 1, wherein: the annular bracket is connected with the rotary driving mechanism through a bracket rotating shaft; the filter disc further comprises a water retaining ring which is coaxially arranged on the support rotating shaft and is abutted against the disc surface of each electromagnetic chuck, an annular water retaining edge is formed on the outer annular wall of the water retaining ring in a protruding mode, and the annular water retaining edge and each electromagnetic chuck are enclosed to form a water retaining groove.

6. An electromagnetic filter as set forth in claim 5, wherein: the number of the water retaining rings is two and the water retaining rings are respectively arranged on two sides of the annular support.

7. An electromagnetic filter as set forth in claim 1, wherein: the impurity removing part comprises a scraping plate, and the working end of the scraping plate is contacted with the disk surface of the electromagnetic chuck at the impurity collecting position; the impurity collector also comprises an impurity collecting tank, and the impurity collecting tank is connected to the lower part of the scraper.

8. An electromagnetic filter according to any one of claims 1 to 7, wherein: the filter discs are provided with a plurality of groups, the annular supports are sequentially arranged on the same support rotating shaft, and the support rotating shaft is connected with the rotary driving mechanism.

9. A method of using an electromagnetic filter according to any one of claims 1 to 8, comprising:

10. The utility model provides a steel cleaning system, includes washing tank and circulation tank, connects its characterized in that through washing liquid supply pipe and washing liquid back flow between washing tank and the circulation tank: an electromagnetic filter according to any one of claims 1 to 8 is arranged on the cleaning liquid return pipe and/or the cleaning liquid supply pipe.