CN211393970U - Electromagnetic iron remover for steel rolling industrial wastewater - Google Patents

Abstract

A steel rolling industrial wastewater electromagnetic iron remover is characterized in that a sewage treatment box is provided with a plurality of electromagnet disks driven by a power mechanism to rotate, a slag scraping groove is arranged on the side surface of each electromagnet disk, a plurality of electromagnets are distributed on the electromagnet disks, the excitation and demagnetization of the electromagnets are controlled by an electromagnetic controller, the electromagnetic controller controls the electromagnets immersed in water to be electrified and excited, and controls the electromagnets above the slag scraping groove to lose electricity and demagnetize; the slag scraping groove is of an outward inclined structure. The method has the advantages that the electromagnet excitation and demagnetization are continuously controllable on line, the service life and the maintenance period of water system equipment are prolonged for large iron slag and small iron slag particles in the steel rolling industrial wastewater, the operation cost is reduced, and the water quality is improved. The rotating speed of the electromagnet disc can be controlled along with the water flow and the speed, the slag removal efficiency of the electromagnet is improved, the number and the size of the electromagnet disc and the internal electromagnets of the electromagnet iron remover can be flexibly adjusted according to the use occasions, and the electromagnetic iron remover is simple to install and maintain and low in cost.

Description

Electromagnetic iron remover for steel rolling industrial wastewater

Technical Field

The utility model relates to an industrial waste water deironing technical field, in particular to steel rolling industrial waste water electromagnetism de-ironing separator.

Background

A steel rolling production line needs to use a large amount of circulating industrial water in the production process to cool the rolling process and strip the iron scale on the surface of a rolled piece; the whole using process can increase the iron slag content in the industrial water, and if the iron slag is not cleaned in time, the sedimentation and the hardening are precipitated at the bottom of the water tank, the effective volume of the water tank is reduced, the water quality treatment effect is reduced, and the damage such as serious abrasion is generated to the operation of equipment such as a water pump and the like.

The technological process of deslagging industrial waste water in a steel rolling mill at present is shown in figure 1. Mainly relies on the whirl well to deposit behind the large granule iron scale, promotes waste water to the advection pond through the elevator pump in the whirl well, utilizes the tiny particle iron sediment of tombarthite magnetic disc absorption aquatic and squeezes its separation in order to realize the slagging-off function. The large granule scum that deposits in the whirl well needs artifical periodic utilization driving grab bucket to snatch to avoid depositing too much scum in the shaft bottom and influence the whirl effect, nevertheless at frequent in-process of snatching, because rivers stir, have a large amount of large granule scum that raise in the aquatic in being inhaled the elevator pump, cause serious wearing and tearing to pipeline, valve, impeller, shorten the life of facility, increase the maintenance cost. The large-particle iron slag is then sent into the advection pool, and due to the equipment characteristics of the rare earth magnetic disc, the iron slag cannot be well treated, so that most of the iron slag can be precipitated in the advection pool to influence the water quality treatment capacity of the advection pool, and one part of the iron slag can be lifted and cooled to return to a production line for use, and finally, the sealing, the nozzle and other parts of the water system equipment on the production line are damaged to influence the production.

In the whole industrial wastewater deslagging process, although the rare earth magnetic disc has certain treatment capacity, the rare earth magnetic disc also has the following defects:

1. flux weakening: the rare earth magnetic disc is made of a permanent magnetic material, and cannot be made into a strong magnetic property in order to scrape iron slag adsorbed on the surface of the rare earth magnetic disc by using a slag scraper, so that the weak magnetic property of the rare earth magnetic disc determines that the rare earth magnetic disc cannot adsorb and separate large-particle steel slag and can only adsorb small-particle steel slag;

2. the rare earth permanent magnetic material is adopted, the magnetism of the surface of the magnetic disk is not controllable, small-particle steel slag adsorbed on the magnetic disk cannot be freely peeled off, the surface of the magnetic disk can only be scraped by using the slag scraping strip, and due to the existence of magnetic force, the slag scraping strip is easy to wear, the service cycle is short, and the use cost is increased;

3. magnetic decay over time during use: because the slag scraper can not completely and effectively scrape the iron slag on the surface of the magnetic disk, with the increase of service life, iron scale with certain thickness can be generated on the surface of the magnetic disk to lead the surface of the magnetic disk to be corroded and deformed, and meanwhile, the magnetism is attenuated year by year, and the iron removal effect is poor in the later period;

4. high cost, 600m water treatment capacity for purchasing one water³The rare earth magnetic disc per hour is about 70.5 ten thousand per machine, the average sewage treatment capacity of a common steel rolling production line is 1800m3 per hour, the purchase cost of the rare earth magnetic disc is about 210 ten thousand yuan, and the rare earth magnetic disc needs to be replaced within about 10 years;

5. rare earth belongs to non-renewable rare shortage resources.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a can not only overcome not enough of present background art, but also can improve quality of water after the industrial waste water treatment, prolong the maintenance cycle, life and the reduction maintenance cost of water system equipment, and this equipment cost, low in use cost, the online controllable steel rolling industrial waste water electromagnetism de-ironing separator in succession of electro-magnet excitation and demagnetization.

The utility model discloses a solution is such:

a steel rolling industrial wastewater electromagnetic iron remover is characterized in that a sewage treatment box is provided with a plurality of electromagnet disks driven by a power mechanism to rotate, a slag scraping groove is arranged on the side surface of each electromagnet disk, a plurality of electromagnets are distributed on the electromagnet disks, the excitation and demagnetization of the electromagnets are controlled by an electromagnetic controller, the electromagnetic controller controls the electromagnets immersed in water to be electrified and excited, and controls the electromagnets above the slag scraping groove to lose electricity and demagnetize; the slag scraping groove is of an outward inclined structure.

The more specific technical scheme also comprises the following steps: the plurality of electromagnet disks are arranged on the same rotating shaft at intervals and rotate simultaneously.

Further: the slag scraping groove is positioned between the adjacent electromagnet disks and is used for collecting iron materials scraped from one side of the adjacent electromagnet disks.

Further: the slag scraping grooves incline towards the same side of the sewage treatment box.

Further: and a conveying belt for collecting the slag scraping groove is arranged below the lowest inclined position of the slag scraping groove.

The utility model has the advantages that:

1. through the control to the magnetic force size of electro-magnet, clear up the bulk iron sediment and the granule iron sediment in the steel rolling industry waste water simultaneously, prolong the life and the maintenance cycle of water system equipment, reduce the operating cost, improve quality of water. The rotating speed of the electromagnet disc can be controlled along with the water flow and the speed, so that the deslagging efficiency of the electromagnet is improved;

2. the electromagnetic iron remover can flexibly adjust the number and the size of the electromagnet discs and the internal electromagnets according to the use occasions, and has simple installation and maintenance and low cost. The cost of one electromagnetic slag remover is about 20 percent of that of one rare earth magnetic disk, the equipment cost is greatly reduced, and the use and maintenance cost is lower than that of the rare earth magnetic disk.

3. The utility model can be applied to other processes related to iron-containing substances except the treatment and recovery of iron slag in the steel rolling industrial wastewater.

Drawings

FIG. 1 is the technological process of slag removal from industrial waste water in steel mill.

Fig. 2 is a schematic structural diagram of the present invention.

FIG. 3 is a flow chart of a process for deslagging industrial waste water using the utility model shown in FIG. 2.

The parts of the drawings are detailed as follows: 1. the device comprises a long shaft driving motor, 2 an electromagnetic controller, 3 a sewage treatment box, 4 an electromagnet disc, 5 a slag scraping groove, 6 a belt driving motor and 7 a conveying belt.

Detailed Description

As shown in fig. 2, in this embodiment, five electromagnet disks 4 driven by a power mechanism to rotate are installed in a sewage treatment tank 3, a slag scraping tank 5 is installed on a side surface of each electromagnet disk 4, a plurality of electromagnets are distributed on the electromagnet disks 4, excitation and demagnetization of the electromagnets are controlled by an electromagnetic controller 2, the electromagnetic controller 2 controls the electromagnets immersed in water to be excited by electricity, and controls the electromagnets above the position of the slag scraping tank 5 to be demagnetized by electricity; the slag scraping groove 5 is of an outward inclined structure.

The electromagnet disks 4 are arranged on the same rotating shaft at intervals and are driven by the long shaft driving motor 1 to rotate simultaneously.

The slag scraping groove 5 is positioned between the adjacent electromagnet disks 4 and collects the iron substances scraped from one sides of the adjacent electromagnet disks 4; the slag scraping groove 5 inclines towards the same side of the sewage treatment box 3, and the lower part of the lowest inclined part of the slag scraping groove 5 is provided with a belt conveyor 7 for collecting the slag scraping groove 5.

The working principle of the embodiment is as follows: the electromagnetic slag remover is characterized in that a long shaft 1 is driven by a motor to rotate, the speed can be adjusted according to water flow and flow velocity, five electromagnet disks 4 are uniformly distributed on the long shaft according to needs, a plurality of electromagnets are uniformly distributed in each electromagnet disk 4, and excitation and demagnetization of the electromagnets are completed by an electromagnetic controller 2. After 4 parts of the electromagnet disc that submerge in water are electrically excited, the iron object in water is adsorbed on the surface of the electromagnet disc, when the electromagnet disc part adsorbed with the iron object rotates to the position above the slag scraping groove 5, the electromagnet is powered off, the iron object adsorbed on the electromagnet disc 4 falls into the slag scraping groove 5, then the iron object is automatically weighted to slide from the slag scraping groove 5 to the conveying belt 7, and after the quantity of the iron object on the belt reaches a certain weight, the conveying belt 7 conveys the iron object to a collection treatment position to be recovered.

The utility model discloses an adopt the magnetic force controllability of electro-magnet, reach the purpose of the size of control magnetic force through control current for the scum of big or small granule can both adsorb, and can control getting lost of electro-magnet magnetism and realize automatic sediment and collection, clear up easily. The electromagnet cannot be attenuated along with time, and the magnetic force can be generated as long as the current is supplied, so that the magnetic force is not influenced by the service time and is controllable. The electromagnet disc is driven to rotate by the motor, the rotating speed of the electromagnet disc can be controlled according to the water flow speed, and iron objects in the wastewater can be better collected. Meanwhile, a group of electromagnetic slag separators are added in front of the cyclone sedimentation tank, so that the iron slag can be reduced from flowing into the cyclone sedimentation tank, the difficulty and the workload of slag grabbing operation are reduced, the amount of the iron slag entering a lift pump is reduced, and the service life of equipment is prolonged.

Claims (5)

1. The utility model provides a steel rolling industry waste water electromagnetism de-ironing separator which characterized in that: the sewage treatment tank (3) is provided with a plurality of electromagnet disks (4) driven by a power mechanism to rotate, the side surface of each electromagnet disk (4) is provided with a slag scraping groove (5), a plurality of electromagnets are distributed on the electromagnet disks (4), the excitation and demagnetization of the electromagnets are controlled by an electromagnetic controller (2), the electromagnetic controller (2) controls the electromagnets immersed in water to be excited by electricity, and controls the electromagnets above the position of the slag scraping groove (5) to lose the electricity and demagnetize; the slag scraping groove (5) is of an outward inclined structure.

2. The electromagnetic iron remover for steel rolling industrial wastewater as claimed in claim 1, wherein: the electromagnet disks (4) are arranged on the same rotating shaft at intervals and rotate simultaneously.

3. The electromagnetic iron remover for steel rolling industrial wastewater as claimed in claim 2, wherein: the slag scraping groove (5) is positioned between the adjacent electromagnet disks (4) and is used for collecting iron substances scraped from one side of the adjacent electromagnet disks (4).

4. The electromagnetic iron remover for steel rolling industrial wastewater as claimed in claim 3, wherein: the slag scraping grooves (5) are inclined towards the same side of the sewage treatment box (3).

5. The electromagnetic iron remover for steel rolling industrial wastewater as claimed in claim 4, wherein: the lower part of the lowest inclined part of the slag scraping groove (5) is provided with a collecting and conveying belt (7) for the slag scraping groove (5).

Images