Parallel electromagnetic iron remover and slurry iron removing method

Abstract

The present application relates to the technical field of slurry iron removal equipment, and discloses a parallel electromagnetic iron remover and a slurry iron removal method, which comprise a shell and further comprise electromagnetic iron removal units, at least two groups of the electromagnetic iron removal units being arranged in parallel in the shell; the electromagnetic iron removal units can be switched between an iron removal working state and a cleaning or standby state, so that the system can realize continuous operation without shutdown through rotation of the working states of different units. Through rotation of the working and cleaning, uninterrupted operation of the system is realized, and the system does not need to be shut down for maintenance in the daily operation state, so that the production efficiency is greatly improved; the number of the electromagnetic iron removal units is adjustable, and part of the electromagnetic iron removal units can be started according to the actual processing capacity or full-load operation is realized; during cleaning, the independent electromagnetic iron removal units are disconnected from the operation state, so that the total energy consumption and operation heat of the system are reduced, and the service life of core components of the iron remover is prolonged. The multiple groups of electromagnetic iron removal units are integrated in parallel in one shell, the pipeline layout is regular, and the structure is compact.

Description

Technical Field

[0001] This invention relates to the field of slurry iron removal technology and equipment, specifically a parallel electromagnetic iron separator and a slurry iron removal method. Background Technology

[0002] Electromagnetic separators are widely used to remove ferromagnetic impurities from slurries. Current technologies often employ a single separator or multiple separators connected in simple parallel for continuous operation. This approach suffers from several drawbacks: continuous operation of the electromagnetic coils leads to high energy consumption and significant temperature rise; multiple independent devices occupy a large area; piping installation is complex; and some general-purpose equipment, such as cleaning pumps and heat exchangers, has redundant configurations. Furthermore, once the iron-removing medium becomes saturated, the entire system must be shut down for backwashing, affecting production continuity. Finally, it cannot flexibly adapt to changes in slurry processing volume.

[0003] Therefore, there is a need for an iron removal device that can achieve continuous operation, save energy and reduce consumption, and is easy to maintain. Summary of the Invention

[0004] This invention addresses the shortcomings of existing technologies by providing a parallel electromagnetic iron removal device and method that overcomes the drawbacks of existing slurry iron removal systems, such as inability to operate continuously, high energy consumption, and inconvenient maintenance. The device enables continuous operation without shutdown, self-cleaning, energy efficiency, and flexible operation. It includes a housing, electromagnetic iron removal units, and at least two sets of these units connected in parallel within the housing. Each electromagnetic iron removal unit can switch between iron removal operation and cleaning or standby states, allowing the system to achieve continuous operation without shutdown by alternating the operating states of different units.

[0005] Preferably, the number of electromagnetic iron removal units is four sets, and the housing is divided into four independent chambers by partitions, with one set of electromagnetic iron removal units installed in each independent chamber.

[0006] Preferably, each of the electromagnetic iron removal units includes: an iron removal chamber having a raw material inlet and a clean material outlet; an electromagnet assembly surrounding the outside of the iron removal chamber for generating a magnetic field to adsorb ferromagnetic impurities; an inlet control valve disposed on a distribution branch pipe connected to the raw material inlet; and an outlet control valve disposed on a discharge pipe connected to the clean material outlet.

[0007] Preferably, the iron removal chamber is horizontally equipped with several layers of screens.

[0008] Preferably, it also includes a cooling mechanism, which includes: a coolant inlet pipe and a coolant outlet pipe, respectively connected to the independent chamber where the electromagnet assembly is located; and a pump body, disposed on the coolant outlet pipe, for driving coolant circulation.

[0009] Preferably, the top of the iron removal chamber is provided with a cleaning fluid inlet for connecting to an external cleaning pipeline.

[0010] Preferably, it also includes a control box, which is equipped with a controller. The controller controls at least one group of the electromagnetic iron removal units to be in the iron removal working state. When a preset working cycle is reached, it automatically performs a rotation operation, switching the unit in the working state to the cleaning state, and switching the unit in the cleaning or standby state to the working state.

[0011] Preferably, the number of electromagnetic iron removal units in operation is dynamically adjusted according to the slurry processing capacity of the production line.

[0012] Preferably, a method for removing iron from slurry using the parallel electromagnetic separator includes the following steps: putting at least one set of electromagnetic separators into an iron removal state to process the slurry; When preset conditions are met, the status of each electromagnetic iron removal unit is rotated and cleaned to ensure that at least one group of units continuously performs iron removal operations.

[0013] Preferably, the step of rotation cleaning specifically includes: S1. Cutting off the power supply to the excitation coil of the unit that is about to enter the cleaning state, as well as its inlet control valve and outlet control valve; S2. Inject cleaning medium into the iron removal chamber of this unit for backwashing; S3. Simultaneously, turn on the inlet control valve, outlet control valve, and excitation coil power supply of the standby unit that is about to enter the working state, so that it is connected to the working sequence.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: by rotating work and cleaning, the system can operate continuously without interruption, and no overall shutdown maintenance is required during daily operation, which greatly improves production efficiency; The number of electromagnetic iron removal units is adjustable. Some electromagnetic iron removal units can be activated or operated at full load according to the actual processing volume. The system can adapt to fluctuations in production load according to capacity demand and achieve economic operation. During the cleaning process, the independent electromagnetic iron removal unit is disconnected from operation, reducing the total energy consumption and heat generation of the system and extending the service life of the core components of the iron remover.

[0015] Multiple electromagnetic iron removal units are connected in parallel and integrated into one housing. The pipeline layout is neat, the structure is compact, and the footprint is small. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be discussed below. Obviously, the technical solutions described in conjunction with the accompanying drawings are only some embodiments of the present invention. For those skilled in the art, other embodiments and their accompanying drawings can be obtained based on the embodiments shown in these drawings without creative effort.

[0017] Figure 1 This is a three-dimensional structural schematic diagram of a parallel electromagnetic iron separator and a slurry iron removal method according to the present invention.

[0018] Figure 2 This is a lower schematic diagram of a parallel electromagnetic iron separator and a slurry iron removal method according to the present invention.

[0019] Figure 3 This is a schematic diagram of the internal structure of the shell of a parallel electromagnetic iron separator and a slurry iron removal method according to the present invention.

[0020] Figure 4 This is a schematic diagram of the electromagnetic iron removal unit of a parallel electromagnetic iron remover and slurry iron removal method according to the present invention.

[0021] Figure 5 This is a diagram of the electromagnet assembly of a parallel electromagnetic separator and a slurry iron removal method according to the present invention.

[0022] Figure 6 This is a cross-sectional structural diagram of the iron removal chamber of a parallel electromagnetic iron remover and slurry iron removal method according to the present invention.

[0023] Figure 7 This is a simulation cloud diagram of the magnetic field of the 4-core structure and 4 sets of magnetic cores under the excitation state of a parallel electromagnetic separator and slurry iron removal method according to the present invention.

[0024] Figure 8 This is a simulation cloud diagram of the magnetic field of a parallel electromagnetic separator and slurry iron removal method of the present invention, showing the magnetic field of a 4-core structure and 2 sets of magnetic cores under excitation state.

[0025] In the diagram: 1-shell; 2-support; 3-branch pipe; 4-discharge pipe; 5-independent chamber; 6-magnetic chamber; 7-iron removal screen; 71-screen; 72-iron removal chamber; 8-inlet control valve; 9-outlet control valve; 10-control box; 11-coolant input pipe; 12-pump body; 13-coolant output pipe. Detailed Implementation

[0026] The technical solutions of various embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments described in the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] An embodiment of the present invention provides a parallel electromagnetic separator, such as... Figures 1-6 As shown, the invention includes a housing 1, an electromagnetic iron removal unit, and a cooling mechanism. A top cover is provided on top of the housing 1. The electromagnetic iron removal unit of the present invention is integrated within the housing 1, which is rectangular in shape. The housing 1 is supported by a bracket 2. A sub-stage raw material distribution branch pipe 3, connected to the main feed pipe, is provided at the lower part of the housing 1, through which the raw material slurry to be processed is drawn from the outside by a slurry pump. A discharge pipe 4 is connected to the upper part of the electromagnetic iron removal unit for outputting the processed slurry.

[0028] The cavity portion inside the housing 1 is divided into four independent chambers 5 by a partition. Each independent chamber 5 is equipped with one set of electromagnetic iron removal units. Each set of independent chambers 5 and the electromagnetic excitation component in the corresponding electromagnetic iron removal unit form a working unit that is arranged opposite to each other. That is, four sets of electromagnetic iron removal units are installed in parallel inside the housing 1.

[0029] A water level gauge is installed on the side wall of the housing 1 to measure the level of coolant inside the housing 1, thereby preventing excessive coolant from affecting equipment operation or even overflowing.

[0030] It also includes a junction box, which is electrically connected to the control box via a cable. The junction box is fixedly installed at the bottom of the housing 1 and is used to distribute and connect cables between various components. A junction box is provided at the top of the housing 1 for cable routing.

[0031] Each electromagnetic iron removal unit includes a cylindrical iron removal screen tube 7. Its bottom inlet is connected to the main feed pipe via a distribution branch pipe 3, and an inlet control valve 8 is installed on the distribution branch pipe 3. Preferably, the inlet control valve 8 is an electromagnetic ball valve, and its driving device is driven to open and close by a controller located in the control box 10. The top outlet is individually connected to the discharge pipe 4 at the top of each electromagnetic iron removal unit to output the treated slurry. Each discharge pipe 4 is equipped with an outlet control valve 9 and a pressure transmitter corresponding to each pipeline. The pressure transmitter converts the pressure parameters sensed by its pressure-sensing element sensor into a standard electrical signal, which is supplied to the controller. This signal, along with secondary instruments such as an indicator alarm, recorder, and regulator, is used for measurement, indication, and process regulation.

[0032] Furthermore, the discharge pipe 4 can also serve as a collection branch pipe. Connecting to the main discharge pipe via the existing four sets of collection branch pipes allows for unified control of the discharge. The convergence of multiple branch pipes is a well-known technical concept to those skilled in the art and will not be elaborated upon here.

[0033] The iron removal screen tube 7 is equipped with a cleaning pipeline interface on its upper part, which can be connected to a clean water or compressed air pipeline.

[0034] The electromagnetic iron removal unit includes an iron removal chamber 72, a magnetic chamber 6, and an electromagnet assembly formed inside the iron removal screen tube 7. The iron removal chamber 72 is vertically positioned at the center of the magnetic chamber 6, and the magnetic chamber 6 surrounds the iron removal chamber 72. The electromagnet is fixedly connected to the outside of the iron removal chamber 72. The electromagnet assembly is fitted inside the magnetic chamber 6, and the iron removal chamber 72 is fitted within the inner ring of the electromagnet assembly. The electromagnet assembly includes an excitation coil and an electromagnet mounting bracket. The excitation coil is controlled by a controller to switch on and off, thereby adjusting the excitation state of the electromagnet assembly.

[0035] The top of the iron removal chamber 72 is provided with a cleaning fluid inlet. A sealing cover is fixed to the top of the iron removal chamber 72 by a plurality of hinged bolts. A screen 71 is provided inside the iron removal chamber 72, and the screen 71 is fixed by a mounting bracket located inside the iron removal screen tube 7 and is horizontally positioned within the inner cavity of the iron removal chamber 72. A plurality of screens 71 are arranged in multiple, evenly spaced layers.

[0036] The iron removal chamber 72 is equipped with a raw material inlet and a clean material outlet. The raw material inlet is located at the bottom of the iron removal chamber 72 and is connected to the distribution branch pipe 3. The clean material outlet is located on the upper side wall of the iron removal chamber 72 and is connected to the discharge pipe 4. The cleaning liquid inlet is connected to the iron removal chamber 72 through a clean water pipeline.

[0037] The cooling mechanism includes a coolant inlet pipe 11 and a coolant outlet pipe 13. The housing 1 is provided with a coolant inlet and a coolant outlet. The coolant inlet pipe 11 is connected to the bottom of the independent chamber 5 through the coolant inlet; the independent chamber 5 is connected to the coolant outlet pipe 13 through the coolant outlet.

[0038] The cooling mechanism also includes a pump body 12, which is connected to the coolant output pipe 13. Powering the pump enhances the coolant circulation. The coolant input pipe 11 and the coolant output pipe 13 are externally connected to a heat dissipation device. To facilitate coolant management during non-iron removal operations of some of the electromagnetic iron removal units, the coolant input pipe 11 is divided into several branches corresponding to the independent chambers 5, each branch capable of independent on / off control. The coolant output pipe 13 collects the cooled coolant after operation into a single channel, where it flows out to form a coolant stream, which is then further pushed to the external heat dissipation device. The external heat dissipation device circulates the coolant and cools it, thereby cooling the electromagnet. The cooling device's method of cooling the coolant is existing technology, and its connection method is a conventional pipe connection. Those skilled in the art can easily select and assemble it according to their needs, and will not be elaborated further here.

[0039] The raw material pipeline and the slag discharge pipeline merge at the bottom of the iron removal chamber 72 to form a single flow pipeline. That is, the flow pipeline is connected to the feed inlet at the bottom of the iron removal chamber 72, and the flow pipeline branches into two routes: the cleaning pipeline and the slag discharge pipeline, which are controlled by different valves.

[0040] Based on the function of the route, the route can be divided into two types: when the iron removal chamber 72 is connected to the raw material inlet and the clean material outlet, it forms a slurry iron removal passage; when the iron removal chamber 72 is connected to the cleaning liquid inlet and the slag discharge pipeline, it forms a cleaning passage.

[0041] The above-mentioned slurry iron separator performs the following method for removing iron from slurry: at least one set of electromagnetic iron removal units is put into the iron removal state to process the slurry; When preset conditions are met, the status of each electromagnetic iron removal unit is rotated and cleaned to ensure that at least one group of units continuously performs iron removal operations.

[0042] The specific steps of the rotation and cleaning process include: Cut off the power supply to the excitation coil of the unit that is about to enter the cleaning state, as well as its inlet control valve 8 and outlet control valve 9; Remove the sealing cover on the top of the iron removal chamber 72 of the unit that has entered the cleaning state, and inject cleaning medium into the iron removal chamber 72 of the unit for backwashing; At the same time, the inlet control valve 8, outlet control valve 9, and excitation coil power supply of the standby unit that is about to enter the working state are turned on, so that it is connected to the working sequence.

[0043] In this method, the operating states of the iron removal chamber 72 include both iron removal state and cleaning state.

[0044] When the equipment is in the iron removal state: the slurry to be treated with a certain pressure is transported along the feed main pipe to the distribution branch pipes 3 of each group, and enters the iron removal chamber 72 through the raw material inlet via the distribution branch pipes 3. The slurry is magnetically adsorbed by the magnetic chamber 6, and the treated slurry flows out through the discharge pipe 4 to the clean material outlet and is discharged to the discharge pipe 4.

[0045] When the equipment is in the cleaning state: first, shut off the distribution branch pipe 3 and the discharge pipe 4 by closing the valve, open the cleaning liquid inlet to connect the clean water pipeline, and open the valve to connect the slag discharge pipeline, so that the cleaning liquid carries iron impurities through the slag discharge pipeline to the slag discharge port for discharge.

[0046] Preferably, when the parallel electromagnetic separator is running, the system is controlled by the controller in the control box 10. By default, three sets of electromagnetic separator units can be activated, with one set reserved for standby or cleaning. When the preset working cycle is reached, such as 8 hours, the controller automatically executes a rotation control strategy: the electromagnet excitation circuit supply switch of the working electromagnetic separator unit is turned off, stopping its excitation, and then high-pressure clean water is injected through the cleaning pipeline interface for backwashing; simultaneously, the valve and excitation of the standby electromagnetic separator unit are opened, adding it to the working sequence. Thereafter, the system maintains a rotation rhythm of three sets in operation and one set in cleaning or standby to ensure continuous iron removal operation.

[0047] Optionally, in full-capacity operation mode, the four sets of inlet control valves 8 are turned on, causing the excitation coil of the electromagnetic iron removal unit to be energized and operate, such as... Figure 7 As shown in the magnetic field strength distribution cloud map, through simulation, the distance between each group of electromagnetic iron removal units and the magnetic field strength of the excitation coil are set so that the magnetic fields of the electromagnetic iron removal units do not affect each other when they are in operation.

[0048] Optionally, when the production line throughput is halved, the controller can be adjusted to operate only two sets of units, while the other two sets enter cleaning or standby mode, thereby achieving energy-saving operation. At this time, the magnetic field state generated by the adjacent two sets of excitation coils is as follows: Figure 8 As shown in the magnetic field intensity distribution cloud map, the magnetic field states do not interfere with each other while ensuring the iron removal effect.

[0049] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered illustrative and non-limiting in all respects. The scope of the invention is defined by the appended claims, not by the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0050] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A parallel electromagnetic separator, comprising a housing (1), characterized in that: An electromagnetic iron removal unit, wherein at least two sets of the electromagnetic iron removal units are arranged in parallel within the housing (1); The electromagnetic iron removal unit can switch between iron removal working state and cleaning or standby state, enabling the system to achieve continuous operation without stopping by rotating the working state of different units.

2. The parallel electromagnetic separator according to claim 1, characterized in that: The number of electromagnetic iron removal units is four sets. The housing (1) is divided into four independent chambers (5) by partitions. Each independent chamber (5) is equipped with one set of electromagnetic iron removal units.

3. The parallel electromagnetic separator according to claim 1, characterized in that: Each of the electromagnetic iron removal units includes: an iron removal chamber (72) having a raw material inlet and a clean material outlet; an electromagnet assembly surrounding the outside of the iron removal chamber (72) for generating a magnetic field to adsorb ferromagnetic impurities; an inlet control valve (8) disposed on a distribution branch pipe (3) connected to the raw material inlet; and an outlet control valve (9) disposed on a discharge pipe (4) connected to the clean material outlet.

4. The parallel electromagnetic separator according to claim 3, characterized in that: The iron removal chamber (72) is horizontally equipped with several layers of screens (71).

5. The parallel electromagnetic separator according to claim 3, characterized in that: It also includes a cooling mechanism, which includes a coolant inlet pipe (11) and a coolant outlet pipe (13), which are respectively connected to the independent chamber (5) where the electromagnet assembly is located; and a pump body (12), which is disposed on the coolant outlet pipe (13) and is used to drive the coolant circulation.

6. The parallel electromagnetic separator according to claim 3, characterized in that: The top of the iron removal chamber (72) is provided with a cleaning liquid inlet for connecting to an external cleaning pipeline.

7. The parallel electromagnetic separator according to claim 1, characterized in that: It also includes a control box (10), which is equipped with a controller. The controller controls at least one set of electromagnetic iron removal units to be in the iron removal working state. When the preset working cycle is reached, it automatically performs a rotation operation, switching the unit in the working state to the cleaning state, and switching the unit in the cleaning or standby state to the working state.

8. The parallel electromagnetic separator according to claim 7, characterized in that, The controller is also configured to dynamically adjust the number of electromagnetic iron removal units in operation based on the slurry processing volume of the production line.

9. A method for removing iron from slurry using a parallel electromagnetic separator as described in any one of claims 1-8, characterized in that, Includes the following steps: At least one set of electromagnetic iron removal units is put into the iron removal state to process the slurry; When preset conditions are met, the status of each electromagnetic iron removal unit is rotated and cleaned to ensure that at least one group of units continuously performs iron removal operations.

10. The method for removing iron from slurry according to claim 9, characterized in that, The specific steps of the rotation and cleaning process include: S1. Cut off the power supply to the excitation coil of the unit that is about to enter the cleaning state, as well as its inlet control valve (8) and outlet control valve (9). S2. Inject cleaning medium into the iron removal chamber (72) of the unit for backwashing; S3. At the same time, turn on the inlet control valve (8), outlet control valve (9) and excitation coil power supply of the standby unit that is about to enter the working state, so that it is connected to the working sequence.

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