KR20240059438A - Air pollutant removal system - Google Patents

Abstract

An air pollutant removal system according to an embodiment of the present invention is disposed at the top of a melting furnace and includes an intake part through which fluid flows, an outlet part through which fluid flowing in from the intake part is discharged, and a space between the intake part and the discharge part. A blower that is disposed and generates a flow of the fluid so that the fluid flows in from the intake portion and is discharged from the discharge portion, and a purifier that is disposed between the intake portion and the discharge portion and purifies the fluid flowing in from the intake portion. The purifying unit includes a first purifying unit that collects dust contained in the fluid, and a second purifying unit that is in communication with the first purifying unit and collects nitrogen oxides contained in the fluid, thereby forming a melting furnace. Dust and nitrogen oxides generated from the system can be removed.

Description

Air pollutant removal system {Air pollutant removal system}

The present invention relates to an air pollutant removal system.

Recently, as the industry develops, environmental problems are also increasing. In general, pollutants are emitted from facilities that use fuel, such as industry and transportation facilities. These pollutants include fine dust, flying dust, and floating harmful substances that worsen the atmospheric environment. The above air pollutants can penetrate the body through the human respiratory tract and cause various diseases.

Accordingly, sustainable development and eco-friendly issues are emerging, and various environmental policies such as industrial waste emission regulations, fine dust reduction policies, and carbon neutrality are being implemented. Accordingly, steel mills are also making efforts to reduce fine dust and carbon emissions.

For the above reasons, in the case of existing steelmaking processes, treatment facilities have been built to resolve air pollutants such as dust and nitrogen oxides generated during the process, including desulfurization facilities to remove sulfur oxides, denitrification facilities to remove nitrogen oxides, and dust treatment facilities. etc. are built.

However, in the case of processes using electric furnaces, facilities for treating air pollutants emitted during the process are insufficient, and in particular, facilities for treating air pollutants such as nitrogen oxides have not been built.

Therefore, there is a need for a system that can remove complex air pollutants such as dust and nitrogen oxides.

The present invention was developed to solve the above problems, and the object of the present invention is to provide an air pollutant removal system that can remove dust and nitrogen oxides generated from a melting furnace.

The problems of the present invention are not limited to the problems mentioned above, and other problems not mentioned will be clearly understood by those skilled in the art from the description below.

An air pollutant removal system according to an embodiment of the present invention is disposed at the upper part of a melting furnace, and includes an intake part into which fluid flows, an outlet part through which fluid flowing in from the intake part is discharged, and between the intake part and the discharge part. It is disposed in, a blowing part that generates a flow of the fluid so that the fluid flows in from the intake part and is discharged from the discharge part, and is disposed between the intake part and the discharge part, and purifies the fluid flowing in from the intake part. and a purifying unit, wherein the purifying unit includes a first purifying unit that collects dust contained in the fluid, and a second purifying unit that is in communication with the first purifying unit and collects nitrogen oxides contained in the fluid.

Additionally, the purifying unit may be disposed between the intake unit and the blowing unit, and the second purifying unit may be disposed between the first purifying unit and the blowing unit.

In addition, the first purifying unit includes a cyclone that separates the dust into fine particles and coarse particles by centrifugal force, and a first dust collecting part including a hopper that accommodates the coarse particles separated by the cyclone, and the fine particles separated by the cyclone are introduced. , It may include a second dust collection unit that filters the particulates, and a cooling cooler disposed between the first dust collection unit and the second dust collection unit.

In addition, it may further include a control unit for controlling the flow in the purification unit, wherein the control unit controls the fluid to be discharged from the first purification unit through the second purification unit to the discharge unit or from the first purification unit. It can be controlled to be discharged to the discharge unit without passing through the second purification unit.

In addition, the purification unit is provided on the outlet side of the first dust collection unit, and includes a dust measuring unit that measures the diameter or amount of dust particles in the fluid and is provided on the outlet side of the first dust collection unit, and the concentration of nitrogen oxide in the fluid. It may further include a nitrogen oxide measurement unit that measures.

In addition, the purification unit includes a first valve that opens and closes a flow passage connecting the first dust collection unit and the second dust collection unit, a second valve that opens and closes a flow passage connecting the first dust collection unit and the second purification unit, and the first dust collection unit. A third valve opening and closing the flow path connecting the discharge unit, a fourth valve opening and closing the flow path connecting the second dust collection unit and the second purification unit, and a fifth valve opening and closing the flow path connecting the second dust collection unit and the discharge unit. It may further include.

In addition, when the measured value of the dust measurement unit is less than the preset value and the measured value of the nitrogen oxide measurement unit is more than the preset value, the control unit closes the first valve and the third valve and closes the second valve. By opening, the fluid can be controlled to be discharged from the first dust collection unit through the second purification unit to the discharge unit.

In addition, the control unit closes the first valve and the second valve when the measured value of the dust measurement unit is less than the preset value and the measured value of the nitrogen oxide measurement unit is less than the preset value, and the third valve is closed. By opening the valve, the fluid can be controlled to be discharged from the first dust collection unit to the discharge unit without passing through the second purification unit.

In addition, the control unit opens the first valve and the fifth valve when the measured value of the dust measurement unit is greater than the preset value and the measured value of the nitrogen oxide measurement unit is less than the preset value, and the fourth valve is opened. By closing the valve, the fluid can be controlled to be discharged from the first dust collection unit to the discharge unit through the second dust collection unit without passing through the second purification unit.

In addition, the control unit opens the first valve and the fourth valve when the measured value of the dust measurement unit is greater than or equal to the preset value and the measured value of the nitrogen oxide measuring unit is greater than or equal to the preset value, and the fifth valve is opened. By closing the valve, the fluid can be controlled to be discharged from the first dust collection unit through the second dust collection unit and the second purification unit to the discharge unit.

An air pollutant removal system according to another embodiment of the present invention is disposed at the top of the melting furnace and includes an intake part through which fluid flows, an outlet part through which fluid flowing in from the intake part is discharged, and a space between the intake part and the discharge part. A blower that is disposed and generates a flow of the fluid so that the fluid flows in from the intake portion and is discharged from the discharge portion, and a purifier that is disposed between the intake portion and the discharge portion and purifies the fluid flowing in from the intake portion. and a section, wherein the intake section moves at the top of the plurality of melting furnaces.

An air pollutant removal system according to another embodiment of the present invention is disposed at the top of a melting furnace and includes an intake part through which fluid flows, an outlet part through which fluid flowing in from the intake part is discharged, and an intake part between the intake part and the discharge part. and a blowing unit that generates a flow of the fluid so that the fluid flows in from the intake unit and discharges from the discharge unit, and is disposed between the intake unit and the discharge unit to purify the fluid flowing in from the intake unit. It includes a purification unit, and a plurality of intake units are provided at the upper part of the plurality of melting furnaces to correspond to the number of the melting furnaces.

An air pollutant removal system according to an embodiment of the present invention is disposed at the upper part of a melting furnace, and includes an intake part into which fluid flows, an outlet part through which fluid flowing in from the intake part is discharged, and between the intake part and the discharge part. It is disposed in, a blowing part that generates a flow of the fluid so that the fluid flows in from the intake part and is discharged from the discharge part, and is disposed between the intake part and the discharge part, and purifies the fluid flowing in from the intake part. a purifying unit, wherein the purifying unit includes a first purifying unit that collects dust contained in the fluid, and a second purifying unit that is in communication with the first purifying unit and collects nitrogen oxides contained in the fluid, Accordingly, dust and nitrogen oxides generated from the melting furnace can be removed.

1 is a diagram showing an air pollutant removal system according to the present invention.
2A to 2D are diagrams showing fluid flow paths according to selective opening and closing of the first to fifth valves of the present invention.
3A and 3B are diagrams showing the movement of the intake unit in an air pollutant removal system according to another embodiment of the present invention.
Figure 4 is a diagram showing an air pollutant removal system according to another embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention will be described in detail so that those skilled in the art can easily implement the present invention. However, the present invention may be implemented in various different forms and is not limited or restricted by the following examples.

Additionally, when a component (or region, layer, section, etc.) is said to be “on,” “connected to,” or “coupled to” another component, it is directly placed/connected/on the other component. This means that they can be combined or a third component can be placed between them.

Terms such as “include” or “have” are intended to designate the presence of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, but do not include one or more other features, numbers, or steps. , it should be understood that it does not exclude in advance the possibility of the existence or addition of operations, components, parts, or combinations thereof.

In order to clearly explain the present invention, detailed descriptions of parts unrelated to the description or related known technologies that may unnecessarily obscure the gist of the present invention have been omitted, and reference signs are added to components in each drawing in this specification. In this regard, identical or similar reference signs are used to designate identical or similar components throughout the specification.

Additionally, terms such as “below,” “on the lower side,” “above,” and “on the upper side” are used to describe the relationship between the components shown in the drawings. The above terms are relative concepts and are explained based on the direction indicated in the drawings.

In addition, terms or words used in this specification and patent claims should not be construed as limited to their usual or dictionary meanings, and the inventor should appropriately define the concept of terms in order to explain his or her invention in the best way. It must be interpreted with meaning and concept consistent with the technical idea of the present invention based on the principle that it can be done.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

One embodiment

Referring to FIG. 1, the air pollutant removal system according to an embodiment of the present invention includes an intake unit 10, an discharge unit 20, a blower 30, and a purification unit 40.

First, the intake unit 10 is disposed at the top of the melting furnace to allow fluid to flow in, and the discharge unit 20 discharges the fluid flowing in from the intake unit 10. Here, a melting furnace refers to a furnace that melts metal by applying heat above the melting point. For example, it may refer to an electric furnace that melts iron scrap or DRI to produce steel. Additionally, the fluid may contain air in the atmosphere and dust or nitrogen oxides generated during the operation of the melting furnace.

The blower 30 is disposed between the intake part 10 and the discharge part 20, and directs the flow of the fluid so that the fluid flows in from the intake part 10 and is discharged from the discharge part 20. The purification unit 40 is disposed between the intake unit 10 and the discharge unit 20 and purifies the fluid flowing in from the intake unit 10.

Here, being disposed between the configurations may mean being located on a fluid flow path between the configurations, and for example, being disposed between the intake portion 10 and the discharge portion 20 means the intake portion ( This may mean that it is located on the fluid flow path between 10) and the discharge unit 20. Hereinafter, they will all be interpreted with the same meaning.

Meanwhile, the purifying unit 40 according to an embodiment of the present invention is in communication with the first purifying unit 410 and a first purifying unit 410 that collects dust contained in the fluid. It includes a second purification unit 420 that collects nitrogen oxides. As a result, complex air pollutants including dust and nitrogen oxides generated from the melting furnace can be effectively removed using a single treatment facility or system. Additionally, by removing complex air pollutants, including nitrogen oxides, using a single facility or system, installation and operating costs can be reduced and installation space can be minimized.

Hereinafter, each configuration of the air pollutant removal system according to an embodiment of the present invention will be described in detail.

Continuing to refer to FIG. 1 , the intake unit 10 is configured to allow fluid containing air pollutants generated in a melting furnace to flow in. The intake unit 10 may have a hood shape that is open at the bottom and narrows from the bottom to the top. The intake unit 10 may be located at a certain distance or more at the top of the melting furnace, and may intake fluid containing air pollutants generated in the melting furnace from the open lower part.

Next, the discharge unit 20 is a configuration through which the fluid flowing in from the intake unit 10 is finally discharged. For example, it may be in the form of a simple pipe or discharge pipe, but is not necessarily limited thereto, and may be an opening/closing valve or discharge nozzle. It may include components such as:

The blower 30 is a device that generates a flow of fluid in the intake unit 10 and the entire system of the present invention, for example, an ID Fan (Induced Draft Fan) that sucks in gas using negative pressure on the suction side and then discharges it. ) can be.

The purifying unit 40 is configured to purify not only dust contained in the fluid but also nitrogen oxides, and the purifying unit 40 may be disposed between the intake unit 10 and the blowing unit 30. Additionally, the second purification unit 420 may be disposed between the first purification unit 410 and the blowing unit 30. Accordingly, after collecting dust in the first purification unit 410, nitrogen oxides can be sequentially collected in the second purification unit 420, and purification efficiency can be increased by separately collecting each pollutant.

That is, looking at the path order, the fluid flowing in from the intake unit 10 collects dust in the first purifier 410, collects nitrogen oxides in the second purifier 420, and then passes through the blower 30. It can be finally discharged through However, here, the blower 30 is located at the end of the path, but of course, it can generate a fluid flow so that the fluid flows in from the intake portion 10.

Looking at the configuration of the first purifier 410 in more detail, the first purifier 410 may include a first dust collector 411, a second dust collector 412, and a cooling cooler 413.

First, the first dust collection unit 411 may include a cyclone 411a that separates the dust into fine particles and particles by centrifugal force and gravity, and a hopper 411b that accommodates the particles separated by the cyclone 411a. . That is, the first dust collection unit 411 can physically collect large-sized dust using a relatively simple device, and primarily collects large dust before the second dust collection unit 412, thereby forming a second dust collection unit (to be described later). 412) can greatly improve the particle collection efficiency.

Next, particulates separated by the cyclone 411a may be introduced into the second dust collection unit 412, and the particulates may be filtered. The second dust collection unit 412 may be, for example, a filter that collects fine dust or particulates electrically/chemically, but is not necessarily limited thereto, and any device that can collect fine dust is sufficient.

The cooling cooler 413 is disposed between the first dust collection part 411 and the second dust collection part 412 and may serve to cool the fluid flowing in from the intake part 10, thereby allowing the high temperature fluid to cool. It prevents heat damage to each device or component within the system and ensures long life of each component and the entire system.

As such, the first purification unit 410 of the air pollutant removal system according to the present invention includes a first dust collection unit 411 and a second dust collection unit 412, and separates and collects the air pollutants through two stages to maximize purification efficiency. You can.

The second purification unit 420 may be, for example, an SCR Catalyst (Selective Catalyst Reduction) that performs selective catalytic reduction to separate nitrogen oxides into nitrogen and carbon dioxide, but is not necessarily limited thereto and is not limited to this, and is not limited to nitrogen oxides (NOx) in the fluid. Any configuration that can remove is sufficient.

Meanwhile, the air pollutant removal system according to an embodiment of the present invention allows the fluid to be transferred to the first dust collection unit 411, the second dust collection unit 412, or the second purification unit 420 of the first purification unit 410, as needed. By selectively performing the process, purification efficiency can be increased and the lifespan of the device can be maintained for a long time. This will be explained in detail below.

First, the air pollutant removal system according to an embodiment of the present invention further includes a control unit (not shown) that controls the flow in the purification unit 40, and the control unit allows the fluid to flow in the first purification unit 410. It is controlled to be discharged to the discharge unit 20 through the second purifier 420, or discharged from the first purifier 410 to the discharge unit 20 without passing through the second purifier 420. It can be controlled as much as possible.

First, the purification unit 40 is provided on the outlet side of the first dust collection unit 411, and includes a dust measuring unit (not shown) that measures the diameter or amount of dust particles in the fluid, and a dust measurement unit (not shown) that measures the diameter or amount of dust particles in the fluid. It is provided in and may further include a nitrogen oxide measurement unit (not shown) that measures the concentration of nitrogen oxide in the fluid. That is, the purification unit 40 measures dust and nitrogen oxides in the fluid through the dust measurement unit and the nitrogen oxide measurement unit, and transmits the measured values to the control unit. The control unit purifies the purification unit 40 based on the transmitted values. The fluid flow path within can be changed.

To explain this in detail, the purification unit 40 may further include a first valve 431 to a fifth valve 435, and the first valve 431 includes the first dust collection unit 411 and the second dust collection unit ( 412), the second valve 432 opens and closes the flow path connecting the first dust collection unit 411 and the second purification unit 420, and the third valve 433 opens and closes the passage connecting the first dust collection unit 411 and the second purification unit 420. 1 Opens and closes the flow path connecting the dust collection part 411 and the discharge part 20, and the fourth valve 434 opens and closes the flow path connecting the second dust collection part 412 and the second purification part 420. , The fifth valve 435 may further include a fifth valve 435 that opens and closes a passage connecting the second dust collection unit 412 and the discharge unit 20. That is, the first to fifth valves 431 to 435 are located between each flow path, so that each flow path is opened and closed, thereby changing the fluid flow path.

Hereinafter, with reference to FIGS. 2A to 2D, the fluid flow and purification path according to the opening and closing of the first to fifth valves by the control unit will be examined in detail.

First, referring to FIG. 2A, when the measured value of the dust measurement unit is less than the preset value and the measured value of the nitrogen oxide measurement unit is more than the preset value, the first valve 431 and the third valve By closing (433) and opening the second valve (432), the fluid can be controlled to be discharged from the first dust collection unit (411) through the second purification unit (420) to the discharge unit (20). there is.

Here, the preset value is a value set by the user as needed. More specifically, it may be a pollutant emission limit value set by the user. The emission limit value of pollutants may, for example, be the maximum value that can be emitted from a steel mill according to government policies and regulations, but is not necessarily limited to this and may be a lower value depending on the user's judgment.

Meanwhile, the fact that the measured value of the dust measurement unit is less than the preset value means that the amount of particulates or fine dust in the fluid remaining after being separated and collected in the first dust collection unit 411 is less than the value set by the user, and the amount of fine dust present is less than the value set by the user. This means that dust collection is unnecessary because the measured value of the nitrogen oxide measurement unit is higher than the preset value, which means that the measured value of nitrogen oxide in the fluid generated from the melting furnace and introduced through the intake unit 10 is somewhat high, and thus nitrogen oxide It may be necessary to capture . Therefore, the control unit opens and closes the first valve 431 to the third valve 433, so that the fluid passing through the first dust collection unit 411 is directly purified without passing through the second dust collection unit 412, which collects fine dust. Only nitrogen oxides are removed from the unit 420 and then controlled to be discharged to the discharge unit 20.

As a result, the air pollutant removal system according to the present invention can minimize unnecessary purification, maintain the lifespan and performance of the second dust collection unit 412 for a long time, and significantly improve the purification speed and efficiency of the entire system.

Next, referring to FIG. 2b, when the measured value of the dust measurement unit is less than the preset value and the measured value of the nitrogen oxide measurement unit is less than the preset value, the first valve 431 and the second 2 Close the valve 432 and open the third valve 433, so that the fluid is discharged from the first dust collection unit 411 to the discharge unit 20 without passing through the second purification unit 420. It can be controlled as much as possible.

Here, the fact that the measured value of the dust measurement unit is less than the preset value means that the amount of fine particles or fine dust in the remaining fluid after being separated and collected in the first dust collection unit 411 is less than the value set by the user, and the amount of fine dust is lower than the value set by the user. This means that dust collection is unnecessary, and if the measured value of the nitrogen oxide measurement unit is less than the preset value, it may mean that the measured value of nitrogen oxide is somewhat low and collection of nitrogen oxide is unnecessary. Therefore, the control unit opens and closes the first valve 431 to the third valve 433 so that the fluid passing through the first dust collection unit 411 does not pass through the second dust collection unit 412 and the second purification unit 420, It can be discharged directly to the discharge part (20).

As a result, the air pollutant removal system according to the present invention can minimize unnecessary purification, maintain the lifespan and performance of the second dust collection unit 412 and the second purification unit 420 for a long time, and significantly increase the purification speed and efficiency of the entire system. It can be improved.

Next, referring to FIG. 2C, when the measured value of the dust measuring unit is greater than the preset value and the measured value of the nitrogen oxide measuring unit is less than the preset value, the first valve 431 and the fifth The valve 435 is opened and the fourth valve 434 is closed, so that the fluid passes from the first dust collection part 411 to the second dust collection part 412 and the second purification part 420. It can be controlled to be discharged to the discharge unit 20 without passing through. At this time, the second valve 432 and the third valve 433 may also be closed.

Here, the fact that the measured value of the dust measurement unit is greater than the preset value means that the amount of fine particles or fine dust in the fluid remaining after being separated and collected in the first dust collection unit 411 is greater than the value set by the user, and the amount of fine dust is higher than the value set by the user. This means that the measured value of the nitrogen oxide measurement unit is less than the preset value, meaning that the measured value of the nitrogen oxide is somewhat low and that collection of the nitrogen oxide is unnecessary. Therefore, the control unit opens and closes the first valve 431, the fourth valve 434, and the fifth valve 435, so that the fluid passing through the first dust collection unit 411 passes through the second dust collection part 412 and the second dust collection part 412. It can be discharged directly to the discharge unit 20 without going through the purification unit 420.

As a result, the air pollutant removal system according to the present invention can minimize unnecessary purification, maintain the lifespan and performance of the second purification unit 420 for a long time, and significantly improve the purification speed and energy efficiency of the entire system.

Lastly, referring to FIG. 2D, when the measured value of the dust measurement unit is greater than or equal to the preset value and the measured value of the nitrogen oxide measuring unit is greater than or equal to the preset value, the first valve 431 and the fourth valve are operated. (434) is opened and the fifth valve 435 is closed to allow the fluid to flow from the first dust collection unit 411 through the second dust collection unit 412 and the second purification unit 420 to the discharge unit. It can be controlled to be discharged to (20). At this time, the second valve 432 and the third valve 433 may also be closed.

Here, the fact that the measured value of the dust measurement unit is greater than the preset value means that the amount of fine particles or fine dust in the fluid remaining after being separated and collected in the first dust collection unit 411 is greater than the value set by the user, and the amount of fine dust is higher than the value set by the user. This means that the measured value of the nitrogen oxide measurement unit is more than the preset value, meaning that the measured value of nitrogen oxides is also somewhat high and that collection of nitrogen oxides is necessary. Therefore, the control unit opens and closes the first valve 431, the fourth valve 434, and the fifth valve 435, so that the fluid passing through the first dust collection unit 411 flows into the second dust collection part 412 and the second purification part. It can be discharged to the discharge unit 20 through (420).

As a result, the air pollutant removal system according to the present invention can effectively collect particulates or fine dust and nitrogen oxides, and can effectively purify fluid containing dust and nitrogen oxides with one system.

Other embodiments

Another embodiment of the present invention differs from the one embodiment in that the intake unit 10 moves at the top of a plurality of melting furnaces. Contents in common with one embodiment will be omitted as much as possible and another embodiment will be described focusing on differences. In other words, it is obvious that if content that is not described in another embodiment is needed, it can be regarded as content of one embodiment.

Referring to FIGS. 3A and 3B, the air pollutant removal system according to another embodiment of the present invention is disposed at the top of the melting furnace, and includes an intake portion 10 into which fluid flows, and fluid flowing from the intake portion 10. A discharge part 20 through which the fluid is discharged is disposed between the intake part 10 and the discharge part 20, and the fluid flows in from the intake part 10 and is discharged from the discharge part 20. A blowing unit 30 that generates a flow, and a purifying unit 40 disposed between the intake unit 10 and the discharge unit 20 and purifying the fluid flowing in from the intake unit 10; , the intake unit 10 moves at the top of a plurality of melting furnaces.

As a result, air pollutants generated from two or more melting furnaces can be treated using one air pollutant treatment system or facility.

Continuing to explain in detail with reference to FIGS. 3A and 3B, when there is a first melting furnace (A) and a second melting furnace (B) in the field, the intake unit 10 is connected to the first melting furnace (A) and the second melting furnace ( Fluid can be sucked in by moving to the upper part of B). That is, as shown in Figure 3a, when the first melting furnace (A) is operated and air pollutants are generated, the intake unit 10 intakes fluid from the top of the first melting furnace (A), as shown in Figure 3b. As described above, when the second melting furnace (B) is operated and air pollutants are generated, the intake unit 10 moves from the first melting furnace (A) to the upper part of the second melting furnace (B) and flows into the second melting furnace (B). The fluid can be purified by sucking the fluid from the top of the .

According to another embodiment of the present invention, air pollutants can be purified in two or more melting furnaces just by moving the intake unit 10, so installation and operating costs can be reduced and installation space can be minimized.

At this time, the intake unit 10 may be moved from the upper part of the melting furnace by a separate driving device. For example, the driving device may be a structure such as a robot arm or a hoist installed on site, but is not necessarily limited thereto, and the intake unit 10 Any configuration that allows the unit 10 to be moved is sufficient.

Other configurations of the intake unit 10 and the detailed configurations of the discharge unit 20, blower 30, and purifier 40 that are not mentioned in other embodiments of the present invention are the same as those described in the above-described embodiment. It can be applied and understood equally, and the configuration of the control unit can also be applied and understood in the same way.

Another Example

Another embodiment of the present invention is different from one embodiment and other embodiments in that a plurality of intake units 10 are provided at the top of a plurality of melting furnaces to correspond to the number of the melting furnaces in one air pollutant removal system. there is. Contents in common with the above-described embodiment and other embodiments will be omitted as much as possible, and another embodiment will be described focusing on differences. In other words, it is obvious that if content that is not described in another embodiment is needed, it can be regarded as content of one embodiment.

Referring to FIG. 4, the air pollutant removal system according to another embodiment of the present invention is disposed at the top of the melting furnace, has an intake part 10 through which fluid flows, and the fluid flowing in from the intake part 10 is discharged. The discharge part 20 is disposed between the intake part 10 and the discharge part 20, and the fluid flows so that the fluid flows in from the intake part 10 and is discharged from the discharge part 20. It includes a blowing unit 30 that generates and a purifying unit 40 that is disposed between the intake unit 10 and the discharge unit 20 and purifies the fluid flowing in from the intake unit 10, A plurality of intake units 10 are provided at the top of a plurality of melting furnaces to correspond to the number of the melting furnaces.

As a result, air pollutants generated from two or more melting furnaces can be removed or purified simultaneously using one air pollutant system. By using one system, installation and operating costs can be reduced, and installation space is minimized. There is an advantage.

Although the present invention has been described above with limited examples and drawings, the present invention is not limited thereto, and the technical idea of the present invention and the following description will be provided by those skilled in the art in the technical field to which the present invention pertains. Various implementations are possible within the scope of equivalency of the patent claims.

10: intake part
20: discharge part
30: blowing unit
40: Purification Department
410: First Purification Department
411: 1st dust collection unit
411a: Cyclone
411b: Hopper
412: Second dust collection unit
413: cooling cooler
420: Second purification unit
431: first valve
432: second valve
433: third valve
434: fourth valve
435: fifth valve
A: First melting furnace
B: Second melting furnace

Claims (12)

An intake portion disposed at the top of the melting furnace and into which fluid flows;
a discharge portion through which fluid introduced from the intake portion is discharged;
a blowing unit disposed between the intake unit and the discharge unit and generating a flow of the fluid so that the fluid flows in from the intake unit and is discharged from the discharge unit; and
It is disposed between the intake part and the discharge part and includes a purifying part that purifies the fluid flowing in from the intake part,
The purification department,
a first purifying unit that collects dust contained in the fluid; and
An air pollutant removal system comprising a second purification unit that communicates with the first purification unit and collects nitrogen oxides contained in the fluid. According to paragraph 1,
The purification department,
disposed between the intake unit and the blowing unit,
The second purification unit,
An air pollutant removal system disposed between the first purification unit and the blowing unit. According to paragraph 1,
The first purification unit,
a first dust collection unit including a cyclone that separates the dust into fine particles and coarse particles by centrifugal force, and a hopper that accommodates the coarse particles separated by the cyclone; and
a second dust collector into which the particulates separated by the cyclone are introduced and filtered out; and
An air pollutant removal system including a cooling cooler disposed between the first dust collection unit and the second dust collection unit. According to paragraph 3,
It further includes a control unit that controls the flow in the purification unit,
The control unit,
An air pollutant removal system that controls the fluid to be discharged from the first purification unit to the discharge unit through the second purification unit, or to be discharged from the first purification unit to the discharge unit without passing through the second purification unit. According to clause 4,
The purification department,
a dust measuring unit provided at the outlet of the first dust collection unit and measuring the diameter or amount of dust particles in the fluid; and
The air pollutant removal system is provided at the outlet of the first dust collection unit and further includes a nitrogen oxide measurement unit that measures the concentration of nitrogen oxide in the fluid. According to clause 5,
The purification department,
a first valve that opens and closes a passage connecting the first dust collection unit and the second dust collection unit;
a second valve that opens and closes a passage connecting the first dust collection unit and the second purification unit;
a third valve that opens and closes a passage connecting the first dust collection unit and the discharge unit;
a fourth valve that opens and closes a passage connecting the second dust collection unit and the second purification unit; and
An air pollutant removal system further comprising a fifth valve that opens and closes a passage connecting the second dust collection unit and the discharge unit. According to clause 6,
The control unit,
If the measured value of the dust measurement unit is less than the preset value and the measured value of the nitrogen oxide measurement unit is more than the preset value,
An air pollutant removal system that controls the fluid to be discharged from the first dust collection unit, through the second purification unit, and into the discharge unit by closing the first valve and the third valve and opening the second valve. According to clause 6,
The control unit,
If the measured value of the dust measurement unit is less than the preset value and the measured value of the nitrogen oxide measurement unit is less than the preset value,
An air pollutant removal system that closes the first valve and the second valve and opens the third valve so that the fluid is discharged from the first dust collection unit to the discharge unit without passing through the second purification unit. According to clause 6,
The control unit,
If the measured value of the dust measurement unit is greater than the preset value and the measured value of the nitrogen oxide measurement unit is less than the preset value,
Opening the first valve and the fifth valve, and closing the fourth valve, so that the fluid passes from the first dust collection unit to the second dust collection unit, but is discharged to the discharge unit without passing through the second purification unit. air pollutant removal system. According to clause 6,
The control unit,
When the measured value of the dust measurement unit is greater than or equal to a preset value and the measured value of the nitrogen oxide measuring unit is greater than or equal to a preset value,
Air pollutants are controlled to open the first valve and the fourth valve and close the fifth valve so that the fluid is discharged from the first dust collection unit through the second dust collection unit and the second purification unit to the discharge unit. Elimination system. An intake portion disposed at the top of the melting furnace and into which fluid flows;
a discharge portion through which fluid introduced from the intake portion is discharged;
a blowing unit disposed between the intake unit and the discharge unit and generating a flow of the fluid so that the fluid flows in from the intake unit and is discharged from the discharge unit; and
It is disposed between the intake part and the discharge part and includes a purifying part that purifies the fluid flowing in from the intake part,
The intake unit,
An air pollutant removal system that moves from the top of a plurality of melting furnaces. An intake portion disposed at the top of the melting furnace and into which fluid flows;
a discharge portion through which fluid introduced from the intake portion is discharged;
a blowing unit disposed between the intake unit and the discharge unit and generating a flow of the fluid so that the fluid flows in from the intake unit and is discharged from the discharge unit; and
It is disposed between the intake part and the discharge part and includes a purifying part that purifies the fluid flowing in from the intake part,
The intake unit,
An air pollutant removal system provided in plural pieces at the top of a plurality of melting furnaces to correspond to the number of melting furnaces.