KR20150056233A - separator for metal dust - Google Patents

Abstract

The present invention relates to a metal dust collecting apparatus. More specifically, the metal dust collecting apparatus can increase the metal dust collection efficiency while not using water. The metal dust collecting apparatus does not use the water to minimize the water pollution and the economic burden of installing and maintaining a water treatment facility. The metal dust collecting apparatus circulates the high-temperature compression air drawn in through a duct instead of discharging the air to the outside to minimize the amount of the metal dust being discharged to the atmosphere. When the compression air is circulated in the duct, the temperature of the compression air drops by a predetermined degree to minimize the likelihood of failure of a compression air spraying unit due to the high temperature compression air.

Description

Separator for metal dust

The present invention relates to a dust collecting apparatus for metallic dust, and more particularly, to a technique for smoothly collecting metallic dust generated in a process of producing metallic by-products produced in a metal-making and smelting process.

In general, smelting processed in smelting or steelmaking processes forms a by-product layer containing various metal components. Such a by-product layer is treated as an impurity and is separately collected and then buried or processed into small granular particles, And so on.

Among them, the process of processing the by-product into the granular particle form,

The byproducts separated from the effluent are in a high-temperature liquid state like the first effluent. This by-product layer is poured into a specific space, and the cooling water and compressed air are injected into the by- As it cools down, particle-shaped by-products fall on the floor.

However, a large amount of dust is produced from by-products in the process of scattering the byproducts through the air and cooling water to the atmosphere.

Such dusts from the byproducts have a metal component, which can cause severe air pollution if they are released into the atmosphere.

Therefore, a dust collecting device for collecting the generated metallic dust is provided in the space for producing the by-product particles.

Conventional dust collectors are formed in the form of ducts, and the metallic dust generated in the process of blowing the byproducts through the compressed air and the cooling water is blown by the wind force of the compressed air and is injected into the duct. At the same time, water is sprayed into the duct, As it is brought into contact with water, the dust is not scattered in the atmosphere and is discharged by water.

However, in the conventional dust collecting apparatus, metallic dust only discharges after discharging only water in the course of passing through the duct, thereby reducing the scattering into the atmosphere, and it does not exhibit a practical dust collecting effect.

Furthermore, in the past, metallic dust is not collected separately but is directly discharged to the atmosphere. Since the metallic dust contains a large amount of metal components, it seriously affects air pollution.

In addition, since a large amount of water is used in order to minimize the scattering of the metallic dust, the consumption of water is increased, resulting in an economical adverse effect,

In addition, after the contact with the metallic dust, the water contains a metal component and various impurities. Accordingly, there is a problem that a separate water treatment facility must be provided.

Korean public utility model 20-1999-0012008 (1999.03.25)

The present invention has been proposed in order to solve such conventional problems,

The object of the present invention is to improve the dust collecting efficiency of metallic dust without using water basically.

It also aims at minimizing the water pollution and the economic burden of water treatment facilities due to the lack of water.

In addition, the present invention aims at minimizing the possibility that metallic dust is discharged to the atmosphere by circulating the high-temperature compressed air introduced into the duct without discharging it to the outside.

In addition, as the temperature of the compressed air is lowered to a certain level during the circulation of the compressed air in the duct, it is aimed to minimize the possibility of occurrence of the failure of the compressed air injection part by the high temperature compressed air in the circulation process do.

To this end, various embodiments of the present invention,

1. A dust collecting apparatus for metallic dust containing a metallic component, the dust collecting apparatus comprising: a duct having an inlet for the metallic dust formed on one side thereof and a moving path for metallic dust on the inside thereof; And a magnetic force filter portion in which metallic dust passing through the path is attached to the surface by a magnetic force.

The magnetic force filter unit is in the form of a sheet material and is located in a shape blocking the movement path, and an air passage hole may be formed through the surface.

Also, the magnetic force filter unit may be electromagnetically shaped so that magnetic force can be selectively generated according to supply of an external power source.

The metallic dust is generated in the process of blowing high-temperature byproducts through the compressed air injected through the compressed air injection unit located outside the duct to the atmosphere, and then flows into the duct together with the compressed air. And the air passing through the movement path may be re-injected to the by-product through the compressed air injection part.

Also, the magnetic force of the magnetic force filter unit can be selectively generated only when the compressed air injected from the compressed air injecting unit blows the by-product.

The apparatus may further include a heat exchanger located in the movement path and accommodating the cooling heat medium therein and contacting the compressed air introduced into the movement path to lower the temperature of the compressed air to a predetermined level.

And detecting whether or not the temperature of the compressed air which is located in the duct and supplied to the compressed air spraying unit through the moving path is within a set temperature range and selectively introduces outside air into the moving path according to the sensed temperature, And a circulating air temperature controller for lowering the temperature of the compressed air supplied to the compressed air spraying unit.

The circulation air temperature control unit may include a temperature sensor positioned between the heat exchanger and the compressed air injection unit to detect whether the temperature of the compressed air passing through the corresponding section falls within a predetermined temperature range, And an external air inflow portion which is located at a position between the heat exchanger and the compressed air injecting portion of the movement path and can open the duct to supply external air into the movement path when the sensed temperature is higher than the set temperature can do.

In addition, an external air inflow hole may be formed at a position between the heat exchanger and the compressed air injecting portion of the duct, and the external air inflow portion may be connected to the temperature sensor to open / close the external air inflow portion.

The external air inflow part is installed in the external air inflow hole and is rotatable. The damper is capable of opening and closing the inflow hole in a turning process. The damper is connected to the damper and the temperature sensing sensor, And a driving motor that is operated according to the rotation of the damper to rotate the damper.

The present invention having these various embodiments,

Basically, since the metallic dust is filtered in the form of being attached to the surface of the magnetic force filter part by the magnetic force of the magnetic force filter part in the process of passing the inside of the duct, the dust collecting efficiency is increased compared with the conventional one.

In addition, since it is not necessary to inject water into the metallic dust inside the duct, it has the advantage of saving resources and reducing burden on water pollution and water treatment facilities.

And the magnetic force filter portion is formed in a shape blocking the movement path of the metallic dust, so that the contact area between the metallic dust and the magnetic force filter portion is maximized to enhance the filtering effect and the compressed air moving with the metallic dust smoothly passes through the through hole .

In addition, since the magnetic force filter unit is formed as an electromagnet, the power is selectively applied only during the passage of the compressed air and the metallic dust into the duct, and the filtering is performed by the magnetic force, .

In addition, since the compressed air supplied to the inside of the duct is not discharged to the air, but is supplied to the compressed air spray part and then re-injected and re-introduced into the duct, the metallic dust Can be minimized.

Also, since the heat exchanger is provided inside the duct, the temperature of the compressed air flowing into the duct at a high temperature in contact with the by-product can be circulated in a state of being reduced to a certain level. Thereby minimizing the possibility of occurrence of a failure.

When the temperature of the circulating air (compressed air) whose temperature is lowered through the heat exchanger due to the circulating air temperature control unit is higher than the proper temperature, external air flows into the duct before the compressed air flows into the compressed air spraying unit, The temperature of the compressed air injection portion can be further lowered, thereby further lowering the failure occurrence rate of the compressed air injection portion.

In addition, the temperature sensor senses the temperature of the compressed air in the duct and the external air inflow part operates by the detection signal to control the inflow of external air, thereby detecting the temperature of the compressed air in the duct and thus controlling the temperature by the external air inflow. And has an advantage that it can be accurately and precisely performed.

Since the damper of the external air inflow portion rotates by the driving motor to open and close the external air inflow hole of the duct, it is possible to control the rotation angle of the damper according to the temperature level of the compressed air in the duct, The temperature of the compressed air can be controlled more precisely.

1 is a schematic view showing installation states of a duct, a heat exchanger, a magnetic force filter unit, and a circulating air temperature control unit, and a moving path of compressed air and dust;
2 is a schematic view showing a magnetic force filter unit and a filtering process therefor;
3 is a schematic view showing a process of lowering the temperature of the compressed air by the heat exchanger
4 is a schematic view showing a process of removing the temperature by the temperature sensor and the external air inlet

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

The metallic dust collecting apparatus according to the present invention comprises a duct 100 and a magnetic force filter unit 200 as shown in FIG.

Prior to the description, the embodiment shown in FIG. 1 shows a case where the present invention is applied to the dust collecting process of dust generated in the process of processing the metallic by-product generated in the smelting and steelmaking process into particles,

The metallic byproduct 10 is in the form of a liquid at a high temperature such as molten metal. When the metallic byproduct is dropped down in the closed space, the metallic byproduct 10 sprays compressed air through the separate compressed air spraying unit 20, (10) to the air.

As the metallic by-product 10 is blown into the air, the metallic by-product 10 is dispersed in the form of particles and simultaneously falls rapidly to the bottom in the form of balls in the form of particles as they are rapidly cooled by the injected cooling water.

As the metallic byproduct 10 is rapidly cooled, it instantaneously explodes due to contact with the cooling water. In this process, a large amount of fine metallic dust is generated from the byproduct.

The duct 100 applied to the present embodiment is a part where the generated micro-metallic dust is collected and provided with a space for filtering and a magnetic filter part 200 to be described later, A movement path 120 of the metallic dust 30 is formed along the entire longitudinal direction.

An inlet 110 for introducing metallic dust is formed at one end of the duct 100 and the other end is connected to an air inlet (not shown) of the compressed air injector 20 located outside the duct 100.

Therefore, the metallic dust 30 flowing into the duct 100 is moved along the movement path 120, then introduced into the compressed air spraying unit 20, and then discharged again.

The reason that the other end of the duct 100 is connected to the compressed air spraying unit 20 is to circulate the compressed air introduced into the duct 100 without discharging it to the outside to minimize air pollution As a result,

If the duct 100 is not connected to the compressed air spraying unit 20 at a level that does not cause environmental pollution by discharging the metallic dust through the filtering of the metallic dust by the magnetic force filter unit described later Can also be implemented.

In the duct 100, a magnetic force filter unit 200 is installed.

The magnetic force filter unit 200 functions to filter out the metallic dust 30 introduced into the duct 100 together with the compressed air. As shown in FIGS. 1 and 2, A plurality of fine holes 210 for passing air are formed and penetrate both sides of the magnetic force filter unit.

Since the magnetic force filter unit 200 is installed to block a specific point in the movement path 120 of the duct 100, the movement path 120 is divided into two parts based on the magnetic force filter unit 200 .

Accordingly, the contact path between the compressed air and the metallic dust 30 and the magnetic filter unit 200 is maximized, and the compressed air flows through the through hole 210 to the magnetic filter unit 200, So that smooth discharge or circulation can be achieved.

For example, the magnetic filter unit 200 may have a permanent magnet shape or may be formed of a metal material and may be magnetized by a magnetic force supplied separately to generate a magnetic force, And an electromagnet type that emits magnetic force by a power source supplied from a power source.

The magnetic force filter unit 200 may be formed in a mesh shape as a whole and may be formed in a shape that the metallic dust 30 surrounds the inner surface of the duct 100 instead of blocking the movement path 120, It can be variously modified as long as it has a technical idea that can be attached to the magnetic force filter unit 200 by a magnetic force in the process of passing through the magnetic force filter unit 200.

In this embodiment, a case where the magnetic force filter unit 200 is of an electromagnet type and a magnetic force of the magnetic force filter unit 200 is generated when power is supplied through a separate power supply unit (not shown) will be described.

That is, the magnetic force filter unit 200 generates magnetic force only in the process of power supply, and the point of time will be mentioned in the operation process to be described later.

The magnetic dust filter unit 200 is installed so that the metallic dust 30 flows through the inside of the duct 100 together with the compressed air, And is attached to the surface of the magnetic force filter unit 200 by the magnetic force of the magnetic force filter unit 200.

For reference, only one magnetic force filter unit may be installed, or a plurality of magnetic force filter units may be disposed along the movement path so that the metallic dust may be filtered several times while passing through each magnetic force filter unit.

A heat exchanger 300 is installed in the duct 100 in which the magnetic force filter unit 200 is installed.

The heat exchanger 300 reduces the temperature of the compressed air introduced into the duct 100 to an appropriate level after being contacted with the high temperature by-product 10, so that the compressed air injected by the high- As shown in FIG. 1 and FIG. 3, is positioned on the inlet 110 of the duct 100 of the movement path 120 of the duct 100, And is located in the interval between the compressed air injection portions 20.

The heat exchanger 300 has a structure in which a heating medium 320 for substantial heat exchange is accommodated in the case 310. The heating medium 320 is circulated inside and outside the case 310 to enhance heat exchange efficiency with the compressed air .

The compressed air introduced into the duct 100 is in contact with the surface of the case 310 of the heat exchanger 300 and indirectly exchanges heat with the heating medium 320 inside the case 310 during the process.

For reference, the heat exchanger may be connected to an external separate supply water as needed and heat-exchanged with the compressed air to heat-exchange the heated heat medium 320 with the supply water to generate hot water, or may be utilized as a heat medium for heating.

Of course, the heat exchanger 300 may be omitted when the circulation structure of the compressed air introduced into the duct 100 is not applied.

In the state that the heat exchanger 300 is installed, the circulating air temperature control unit 400 is installed in the duct 100.

The circulating air temperature control unit 400 further regulates the temperature of the compressed air circulated through the duct 100 to selectively introduce external air into the duct 100 according to the temperature level to perform additional heat exchange with the compressed air And includes a temperature sensor 410 and an external air inlet 420 as shown in FIG. 1 and FIG. 4.

For reference, the circulating air in the name of the circulating air temperature control unit 400 means compressed air flowing into the compressed air spraying unit after moving along the inside of the duct.

First, the temperature sensor 410 detects the temperature of the compressed air passing through the section before passing through the heat exchanger 300 after the temperature of the compressed air moves along the inside of the duct 100, And determines whether or not the temperature has been lowered to an appropriate level. In general, a known technique of detecting the temperature of the air is applied.

Therefore, the temperature sensor 410 is formed between the heat exchanger 300 and the compressed air injector 20 in the movement path 120 of the duct 100 to check the temperature of the compressed air passing through the corresponding section.

At this time, the temperature sensor 410 is connected to a separate controller (not shown), and the controller receives the temperature information sensed by the temperature sensor 410 and determines whether the temperature information is included in the set temperature.

In addition, the external air inlet 420 constituting the circulating air temperature controller 400 selectively introduces external air into the duct according to the temperature of the compressed air sensed through the temperature sensor 410, And again comprises a damper 422 and a drive motor 424. The dampers 422 and the drive motor 424 are connected to each other.

In order to install the external air inflow part 420, an air inflow hole 130 is formed at one side of the duct 100 so that the outside and the inside of the duct 100 communicate with each other through the air inflow hole 130.

The damper 422 of the external air inflow portion 420 functions to control the inflow and outflow of external air and is formed in the shape of a plate having the same area as that of the air inflow hole 130, And the air inlet hole 130 is closed.

At this time, the rim of the damper 422 and the rim of the air inflow hole 130 are connected to each other through the hinge 423 so that the damper 422 is rotatable around the hinge 423 and the air inflow hole 130 Can be opened and closed.

A separate driving motor 424 is connected to the hinge of the damper. The driving motor 424 generates a driving force required to rotate the damper 422. A general electric motor is used. The motor shaft is connected to the hinge And the damper is rotated when the motor is operated.

At this time, the driving motor is configured to control the rotation angle of the motor shaft so that the rotation angle of the damper can be controlled, thereby controlling the opening / closing degree of the air inflow hole 130, So that it can be controlled.

The driving motor is connected to the temperature sensing sensor through the control unit, and the operation of the driving motor is controlled according to the temperature of the compressed air in the duct 100 sensed through the temperature sensing sensor 410.

For reference, the connection structure between the driving motor and the damper is not limited to a specific structure, and the motor shaft and the hinge of the driving motor may be directly connected or indirectly connected through a separate power transmitting member.

Furthermore, the structure of opening and closing the air inflow hole 130 is not limited to the damper and the driving motor shown in the above description and drawings, but may detect the temperature of the compressed air in the duct 100 and may cause external air to flow into the duct If the structure is capable of flowing in, it can be variously modified in various ways.

Hereinafter, the operation of the present invention based on such a configuration and the unique effects generated in the process will be described.

The present invention will be described on the basis of a case where the by-product collected in the smelting and steelmaking process as shown in FIG. 2 is applied to a system for blowing air through compressed air. Of course, the technical idea of the present invention is not limited to this embodiment, but can be applied to all cases where dust collection of metallic dust is required.

As the compressed air injected through the compressed air spraying unit 20 blows the byproducts during the process of dropping high-temperature by-products in the air in the closed workplace, the by-products are deformed into particles, The dust 30 flows into the duct 100 through the inlet 110 of the duct 100 together with compressed air.

In this process, the metallic dust 30 moves along the movement path in the duct 100. In this process, power is applied to the magnetic force filter unit 200 and a magnetic force is formed in the magnetic force filter unit 200 .

The metallic dust is attached to the surface of the magnetic force filter unit 200 by the magnetic force of the magnetic force filter unit 200 and is filtered.

As the dust is filtered through the magnetic force using the metal property of the dust, it is not necessary to spray water separately, and a higher filtering effect is obtained.

In addition, since water is not used, it has an advantage that it does not need facilities necessary for water supply and equipment required for recovery after recovering used water.

While the compressed air injected through the compressed air injecting section 20 blows the by-product into the air, the filtering by the magnetic force filter section 200 continues, and the process of blowing the by-product into the air is completed, The magnetic force of the magnetic force filter unit 200 is also stopped.

At the same time, the metallic dust attached to the magnetic force filter unit 200 is separated from the magnetic force filter unit 200, and then falls and is collected separately.

Since the filtering by the magnetic force filter unit is selectively performed only in the process of introducing the metallic dust into the duct, a sufficient filtering effect can be obtained while minimizing the power consumption of the filter.

Of course, when the magnetic force filter unit is in the form of a permanent magnet other than an electromagnet type, the magnetic dust filter unit 200 itself is taken out to the outside while the metallic dust 30 is attached to the surface of the magnetic filter unit 200, You may.

In the process of filtering the metallic dust 30 by the magnetic force filter unit 200, the compressed air in the duct continues to move along the movement path 120 after passing through the through hole 210 of the magnetic force filter unit 200.

Since the compressed air before being introduced into the duct is in contact with the by-product, it flows into the duct 100 at a very high temperature. The high-temperature compressed air thus introduced is brought into contact with the surface of the case 310 of the heat exchanger 300 before passing through the magnetic force filter unit 200, and indirectly contacted with the heating medium 320 in the heat exchanger, The temperature is lowered due to heat exchange.

The compressed air passing through the magnetic force filter unit 200 moves along the movement path 120 and then flows into the compressed air spray unit 20. Before the compressed air is injected into the compressed air spray unit 20, ) Detects the temperature of the compressed air in the corresponding zone and determines whether the compressed air temperature has decreased to an appropriate level.

If the compressed air temperature at the point is not sufficiently lowered, the air inlet hole 130 of the duct 100 is opened as the damper 422 is rotated by the drive motor 424, and at the same time, The outside air is introduced into the duct.

As the outside air is introduced into the duct 100, the temperature of the compressed air is further reduced by heat exchange with the compressed air in the duct 100, and then the compressed air is injected into the compressed air injecting unit 20 And serves to blow down byproducts into the air.

As the compressed air in the duct is re-introduced into the compressed air injector 20, the external air is introduced into the duct 20 to further reduce the temperature of the compressed air. Accordingly, the compressed air at a high temperature is directly supplied to the compressed air injector 20 It is possible to minimize the possibility of occurrence of a failure of the compressed air injection portion which may occur due to the inflow.

Further, it is possible to control an additional temperature drop level of the compressed air by controlling the rotation angle of the damper according to the temperature of the compressed air in the duct to regulate the inflow amount of the external air.

The compressed air injected again through the compressed air injecting unit 20 flows into the duct 100 together with the metallic dust and then passes through the magnetic force filter unit and is again injected through the compressed air injecting unit 20 Has a repeating cyclic structure.

As the compressed air is circulated to the inside of the workplace and the duct without being discharged to the outside of the workplace, the metallic dust is also discharged together with the exhausted water to the outside of the workplace after filtering, thereby solving the problem of air pollution.

For reference, when the circulation structure of the compressed air is applied, the heat exchanger 300 and the circulating air temperature control unit 400 do not necessarily have to be provided together, and if the temperature of the compressed air in the duct can be sufficiently lowered through either one Only one of them can be selectively applied.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the exemplary embodiments, but, on the contrary, It is possible to increase the filtering effect of metallic dust compared with the conventional method, and it is possible to solve the problems caused by the facilities and water treatment at the same time because it does not require the use of water It is to be understood that the present invention belongs to the protection scope of the present invention.

10: By-product 20: Compressed air injection part
30: Metallic dust 100: Duct
110: Inlet port 120:
130: air inflow hole
200: magnetic force filter unit 210: through hole
300: heat exchanger 310: case
320: Heating medium 400: Circulating air temperature control unit
410: Temperature sensor 420: External air inlet
422: damper 423: hinge
424: drive motor

Claims (10)

A duct in which an inlet of the metallic dust is formed on one side and a moving path of metallic dust is formed on the inside,
A magnetic force filter unit having a magnetic force and being attached to the surface of the metallic dust passing through the moving path by a magnetic force,
Containing
Metallic dust collecting device.
The method of claim 1,
Wherein the magnetic force filter portion is in the form of a plate material and is located in a shape blocking the movement path, wherein an air passage hole is formed through the surface
Metallic dust collecting device.
The method of claim 1,
The magnetic force filter unit is of an electromagnet type, and magnetic force is selectively generated according to supply of an external power source
Metallic dust collecting device.
The method according to claim 1 or 3,
The metallic dust is generated in a process of blowing high-temperature byproducts through the compressed air injected through the compressed air injection unit located outside the duct to the atmosphere, and then flows into the duct together with the compressed air.
The other end of the duct is connected to the compressed air spraying part so that air passing through the path of the sprayed air is re-sprayed to the by-product through the compressed air spraying part
Metallic dust collecting device.
5. The method of claim 4,
The magnetic force of the magnetic force filter unit
The compressed air injected from the compressed air injecting portion is selectively generated only during the process of blowing the by-
Metallic dust collecting device.
5. The method of claim 4,
And a heat exchanger which is located in the movement path and accommodates a heating medium for cooling and which is brought into contact with the compressed air introduced into the movement path to lower the temperature of the compressed air to a predetermined level,
Further comprising
Metallic dust collecting device.
The method of claim 6,
Wherein the control unit senses whether the temperature of the compressed air which is located in the duct and is supplied to the compressed air spraying unit through the moving path is within a predetermined temperature range, selectively introduces outside air into the moving path according to the sensed temperature, A circulating air temperature control unit for controlling the temperature of the compressed air supplied to the air injecting unit,
Further comprising
Metallic dust collecting device.
8. The method of claim 7,
The circulating air temperature controller may include:
A temperature sensing sensor which is located between the heat exchanger and the compressed air injecting part of the moving path and detects whether the temperature of the compressed air passing through the corresponding section is within a set temperature range,
And a duct connected to the temperature sensor and located at a position between the heat exchanger and the compressed air injecting part of the moving path and capable of opening the duct to supply outside air into the moving path when the sensed temperature is higher than a set temperature, Air inlet
Containing
Metallic dust collecting device.
9. The method of claim 8,
An external air inflow hole is formed at a position between the heat exchanger and the compressed air injecting portion of the duct,
And the external air inflow part is connected to the temperature sensing sensor to open / close the external air inflow part
Metallic dust collecting device.
The method of claim 9,
Wherein the external air inflow part comprises:
A damper installed on the external air inflow hole and rotatable and capable of opening and closing the inflow hole in a turning process;
And a driving motor connected to the damper and the temperature sensing sensor and operated according to a sensing signal transmitted from the temperature sensing sensor to rotate the damper,
Containing
Metallic dust collecting device.

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