WO2021096302A1 - Electric dust collector and air purification system using same for subway station - Google Patents

Abstract

In an electric dust collector and an air purification system using same for a subway station, the electric dust collector charges contaminated air and collects the charged fine particles, and comprises a dust collection part, a high-pressure air spray part, and a suction part. The dust collection part collects the charged fine particles by means of electrostatic force. The high-pressure air spray part at one side of the dust collection part sprays high-pressure air toward the fine particles collected in the dust collection part. The suction part at the other side of the dust collection part sucks the fine particles separated from the dust collection part by means of the high-pressure air spray part.

Description

Electric dust collector and air purification system of subway station using the same

The present invention relates to an electric dust collector and an air purification system of a subway station using the same, and more particularly, to a large-capacity electric dust collector that is used in subway stations to purify contaminated air in subway stations, it is easy to collect fine particles collected on a dust collection plate. It relates to an electric dust collector that can be removed easily and an air purification system of a subway station using the same.

In recent years, as problems related to air pollution such as fine dust have emerged, household air purifiers such as air purifiers are widely supplied. Apart from air purifiers for home or personal use, large-capacity air purification systems are installed in public places where air is easily polluted, such as subway stations.

Currently, the air purification system of subway stations uses a method of filtering out dust or harmful substances through a filter. However, in subway stations with high pollution, large-capacity filters are contaminated within a very short period, resulting in poor filter performance, resulting in poor air purification efficiency. A problem arises. In addition, there is a problem that it is expensive to replace the filter.

Accordingly, dust or harmful substances can be removed by using an electric dust collecting method instead of a filter method, but when using a large-capacity electric dust collector, a high voltage must be applied, so there is a risk of fire.

Accordingly, there is an increasing demand for an electric precipitator of a low maintenance cost and a safe method or an air purification system in a subway station to which the electric precipitator is applied.

Related prior documents include Korean Patent Laid-Open No. 10-2011-0014076 and Korean Patent No. 10-1577567.

Accordingly, an object of the present invention is to solve such a conventional problem, in which a high-pressure gas is injected from one side of the dust collecting unit to separate the fine particles from the dust collecting plate, and the suction unit sucks the fine particles from the other side of the dust collecting plate. It is to provide an electric dust collector that can be easily removed.

In addition, another object of the present invention is to provide an air purification system for a subway station using the electric dust collector.

The electric dust collector according to an embodiment for realizing the object of the present invention collects charged fine particles by charging contaminated air, and includes a dust collection unit, a high-pressure gas injection unit, and a suction unit. The dust collecting unit collects the charged fine particles by electrostatic force. The high-pressure gas injection unit injects high-pressure gas from one side of the dust collecting unit toward the fine particles collected in the dust collecting unit. The suction part sucks the fine particles separated from the dust collecting part by the high-pressure gas injection part at the other side of the dust collecting part.

In one embodiment, the high-pressure gas injection unit is angle adjustable and includes an injection nozzle for injecting high-pressure gas, the suction unit includes a hopper, and the injection nozzle and the hopper move so as to be at positions opposite to each other. I can.

In one embodiment, the dust collecting unit is arranged in parallel and spaced apart from a plurality of dust collecting plates, a potential difference is formed between neighboring dust collecting plates, the high-pressure gas injection unit is disposed on one side of the dust collecting unit into which fine particles are introduced, and the suction unit It may be disposed on the other side of the dust collecting part so as to face the high-pressure gas injection part.

In one embodiment, the dust collecting plate includes a first dust collecting plate to which a high voltage is applied, and a second dust collecting plate collecting fine particles charged with an electrostatic force formed by a potential difference between the first dust collecting plate and the edge of the first dust collecting plate. At least one discharge pin may be formed in the.

In one embodiment, an ion generator including carbon fibers and a voltage applying device for applying a high voltage to the carbon fibers further include a charging unit disposed in front of the dust collecting unit, and the high-pressure gas injection unit It is disposed between the dust collecting parts and sprays high-pressure gas toward the charging part to remove fine particles accumulated on the carbon fiber.

In one embodiment, a plurality of the ion generators are spaced apart from at least one fixed rod, and when charging the fine particles, the fixed rod is rotated so that the ion generator faces the direction in which contaminated air is introduced, and the carbon When removing the fine particles accumulated on the fiber, the fixed rod may be rotated so that the ion generator faces the high-pressure gas injection unit.

In an embodiment, the dust collecting unit is a plurality of first dust collecting plates having a high voltage applied and spaced apart from each other in parallel, and having a first electrical connection electrically connected at one end thereof, and disposed between the first dust collecting plates to be adjacent to each other. A plurality of second dust collecting plates, the first dust collecting plates and the second dust collecting plates, which form a potential difference with the first dust collecting plate and having a second electrical connection part electrically connected at one end thereof, are accommodated therein, and air is introduced. And a shielding plate separating a chamber in which an inlet is formed, and a dust collecting space for collecting air introduced from the inlet in the chamber, and an electrical connection space to which the first electrical connection and the second electrical connection are electrically connected. I can.

In one embodiment, the chamber includes a first chamber that is open on one side and forms the electrical connection space, a second chamber that is open on one side and forms the dust collection space, and is coupled to the first chamber, The shielding plate may be interposed between the first chamber and the second chamber.

In an embodiment, the first electrical connection part and the second electrical connection part are disposed in the electrical connection space, and may further include a positive pressure forming part configured to supply gas into the electrical connection space to form pressure.

In one embodiment, the first dust collecting plate includes a first main plate part located in the dust collecting space and connected to the first electrical connection at an end, and the second dust collecting plate is located in the dust collecting space and at an end of the dust collecting plate. And a second main plate portion to which a second electrical connection portion is connected, the first electrical connection portion extending to one side of the first main plate portion with a width narrower than that of the first main plate portion, and the second electrical connection portion It may extend to the other side of the second main plate portion with a width smaller than that of the second main plate portion.

In one embodiment, a first fixing portion formed at one side of the electrical connection space, wherein a plurality of fixing slots electrically connecting the first dust collecting plates are inserted into the electrical connection space, and in the electrical connection space A second fixing part formed on the other side and having a plurality of fixing slots formed to be spaced apart from each other by inserting the second electrical connection part to electrically connect the second dust collecting plates may be further included.

In one embodiment, a first fixing rod fixed through the chamber and fixing the plurality of first dust collecting plates, and a second fixing rod fixed through the chamber and fixing the plurality of second dust collecting plates, , A fixing hole or a fixing groove fixed to the first fixing rod may be formed in the first dust collecting plate, and a fixing hole or fixing groove fixed to the second fixing rod may be formed in the second dust collecting plate.

In an embodiment, at least one of the first fixing rod and the second fixing rod is formed, and a plurality of the first dust collecting plates through a high voltage application part connected to any one of the first fixing rods. A high voltage is applied to and grounding any one of the second fixing rods to ground the plurality of second dust collecting plates.

In one embodiment, each of the first and second dust collecting plates may be formed of a plastic film layer and a coating layer coated with carbon on the film layer.

In one embodiment, each of the first and second dust collecting plates includes a plastic film layer, a first coating layer coated with carbon on the film layer, and a second coating layer coated with plastic on the first coating layer. Is formed, and a part of the first coating layer may be exposed to the outside without being coated by the second coating layer.

In one embodiment, the edge of the first coating layer exposed to the outside without being coated by the second coating layer may be coated with an insulating material.

In one embodiment, the flow velocity of the gas injected from the high-pressure gas injection unit may be 250 m/s or more.

An air purification system of a subway station according to an embodiment for realizing another object of the present invention described above is an air supply unit that sucks external air from the ground underground, contaminated air in the underground space, and external air sucked from the air supply unit. An electric dust collector that receives air and purifies the air, and an exhaust unit that discharges air in the underground space to the outside. In this case, the electric dust collector includes a dust collecting unit that collects charged fine particles with electrostatic force, a high-pressure gas injection unit that injects high-pressure gas from one side of the dust collecting unit toward the fine particles collected in the dust collecting unit, and the other side of the dust collecting unit. And a suction part for sucking fine particles separated from the dust collecting part by the high-pressure gas injection part.

In one embodiment, an air supply damper is formed in the air supply unit to control a flow rate of air introduced from the air supply unit to the electric precipitator, is formed in a recycling duct connecting the underground space and the electric precipitator, in the underground space A recycling damper configured to control a flow rate of air introduced into the electric dust collector, and an exhaust damper formed in the exhaust unit to control a flow rate discharged from the underground space to the outside may be further included.

In one embodiment, the electric dust collecting unit further includes a charging unit for charging fine particles, and the charging unit is a recycling duct connecting the electric dust collector to the front end of the dust collecting unit, the air supply unit, and the underground space and the electric dust collector. It may be formed in at least one or more of the entrances to which the recycling duct is connected to the interior or underground space.

According to the electrostatic precipitator according to the embodiments of the present invention as described above, since the fine particles are collected by the electrostatic precipitating method without using a filter, the cost of replacing the filter can be reduced, and the high-pressure gas injection unit and the suction unit are used. Thus, there is an advantage in that the fine particles collected on the dust collecting plate can be removed inexpensively and easily.

In addition, since it is possible to disperse the charged parts over the entire system, it is possible to reduce the magnitude of the voltage applied to each charging part, thereby reducing ozone generation and reducing the risk of fire.

In addition, there is an advantage in that the dust collection plate can be constructed lightly and inexpensively by forming the dust collection plate by coating carbon on the flexible plastic film layer.

In addition, there is an advantage in that it is possible to remove fine dust accumulated on the carbon fiber of the charged part by using a high-pressure gas injection part for removing the fine dust collected in the dust collecting part.

In addition, by separating the dust collection space where dust is collected in the chamber accommodating the dust collection unit and the electrical connection space to which the dust collection plate is electrically connected through a shielding plate, a fire occurs due to contamination by fine dust in the area where the dust collection plate is electrically connected. There is also the advantage of being able to solve the problem.

In addition, there is an advantage in that space efficiency can be improved by enabling all of the plurality of first dust collecting plates to which a high voltage is applied and the plurality of second dust collecting plates to be grounded to be electrically connected at one side of the chamber.

1 is a schematic diagram showing a schematic configuration of an electric precipitator according to an embodiment of the present invention.

FIG. 2 is a perspective view illustrating a charging unit in FIG. 1.

3 is a perspective view showing a state in which the fixing rod is rotated to remove fine dust from carbon fibers in FIG. 2.

4A and 4B are schematic diagrams illustrating a state in which a high-pressure gas is injected from the high-pressure gas injection unit of FIG. 1 toward a dust collecting plate.

5 is a schematic diagram showing a state in which the hopper of the suction unit of FIG. 1 sucks dust.

6 is a cross-sectional view showing a cross-sectional view of portion'A' of FIG. 5.

FIG. 7 is a schematic diagram illustrating an operation of removing dust accumulated on carbon fibers of a charging unit in the electric dust collector of FIG. 1.

8 is a schematic diagram showing a schematic configuration of an electric precipitator according to another embodiment of the present invention.

9 is a schematic diagram showing a dust collecting unit of FIG. 8.

10 is a graph showing the experimental results of measuring the cleaning efficiency versus the flow rate of the gas injected from the injection nozzle.

11 is a schematic diagram showing an air purification system of a subway station according to another embodiment of the present invention.

12 is a schematic diagram showing the air purifier of FIG. 11.

13 is a side view illustrating the dust collecting unit of FIG. 11.

14 is a perspective view showing the shield of FIG. 13.

15 is a perspective view illustrating the first dust collecting plate of FIG. 13.

16 is a perspective view illustrating a second dust collecting plate of FIG. 13.

17 is a perspective view illustrating a state in which the first dust collecting plate and the second dust collecting plate of FIGS. 15 and 16 are electrically connected to the fixing unit.

18 is an exploded perspective view of FIG. 17.

19A is a schematic diagram showing a dust collecting unit according to another embodiment of the present invention, FIG. 19B is an enlarged cross-sectional view of a portion'B' of FIG. 19A, and FIG. 19C is an enlarged view of a portion'C' of FIG. 19A FIG. 19D is a cross-sectional view showing an enlarged portion'D' of FIG. 19A.

20A and 20B are plan views illustrating one surface of a first dust collecting plate and one surface of a second dust collecting plate as an example of FIG. 19A, respectively.

21A and 21B are plan views illustrating the other surface of the first dust collecting plate and the other surface of the second dust collecting plate as an example of FIG. 19A.

<Explanation of code>

10, 10a, 10b, 11: electric dust collector 20: air purification system

15: recycling duct 16: recycling damper

30: air supply unit 32: pretreatment filter 34: air supply damper

50: exhaust part 52: exhaust damper 100: housing

110: lower part 112: diaphragm 113: compartment

114: fixed rod 115: ion generator 116: carbon fiber

118: voltage application device 120: dust collecting unit 122: dust collecting plate

122a: first dust collecting plate 122b: second dust collecting plate 1221: film layer

1222: coating layer 1225a: first main plate portion

1225b: second main plate portion 1226a: first electrical connection portion

1226b: second electrical connection 1227a: fixing hole

1227b: fixed hole 1228a: through hole 1228b: through hole

1229a: first fixed rod 1229b: second fixed rod

1230: conducting member 128a: first fixing portion 128b: second fixing portion

129: fixed slot 1291: fixed block 1292: elastic plate

123: discharge pin 130: high-pressure gas injection unit 132: injection nozzle

134: compressor 140: suction unit 142: hopper

145: negative pressure forming unit 150: positive pressure forming unit 160: heat exchanger

170: pretreatment filter 200: chamber 201: first chamber

202: second chamber 203: gap maintaining unit 205: shielding plate

206: screw hole 207: slit hole 208: bolt

210: electrical connection space 220: dust collection space S: sensor

Specific details of the embodiments are included in the detailed description and drawings.

Advantages and features of the present invention, and a method of achieving them will become apparent with reference to the embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in a variety of different forms, and only these embodiments make the disclosure of the present invention complete, and are common knowledge in the technical field to which the present invention pertains. It is provided to completely inform the scope of the invention to those who have, and the invention is only defined by the scope of the claims. The same reference numerals refer to the same elements throughout the specification.

Hereinafter, the present invention will be described with reference to the drawings for explaining an electric precipitator according to embodiments of the present invention.

1 is a schematic diagram showing a schematic configuration of an electric precipitator according to an embodiment of the present invention. FIG. 2 is a perspective view illustrating a charging unit in FIG. 1. 3 is a perspective view showing a state in which the fixing rod is rotated to remove fine dust from carbon fibers in FIG. 2. 4A and 4B are schematic diagrams illustrating a state in which a high-pressure gas is injected from the high-pressure gas injection unit of FIG. 1 toward a dust collecting plate. 5 is a schematic diagram showing a state in which the hopper of the suction unit of FIG. 1 sucks dust. 6 is a cross-sectional view showing a cross-sectional view of portion'A' of FIG. 5. FIG. 7 is a schematic diagram illustrating an operation of removing dust accumulated on carbon fibers of a charging unit in the electric dust collector of FIG. 1.

1 to 7, the electric dust collector 10 according to an embodiment of the present invention includes a charging unit 110, a dust collecting unit 120, a high-pressure gas injection unit 130, and a suction unit 140. .

The housing 100 provides a path through which contaminated air moves, and the charging unit 110, the high-pressure gas injection unit 130, the dust collecting unit 120, and the suction unit 140 in order along the movement direction of the air indicated by an arrow. ) Can be placed. At this time, the positions of the high-pressure gas injection unit 130 and the suction unit 140 may be changed to each other, but as shown below, the high-pressure gas injection unit 130 is formed in front of the dust collecting unit 120 and the suction unit ( It will be described that 140) is formed in the rear of the dust collecting unit 120.

The charging unit 110 is installed at the inlet side through which contaminated air is introduced to generate ions, thereby charging fine particles in the contaminated air. The charging unit 110 may include an ion generator 115 made of a plurality of strands of carbon fibers 116 and a voltage application device 118 for applying a high voltage (current) to the ion generator 115.

When a high voltage (current) is applied to the carbon fiber 116 in the voltage application device 118, a large amount of ions are generated in the carbon fiber 116. At this time, (+) ions or (-) ions are generated according to the type of current applied from the voltage application device 118.

When generating ions by applying a high voltage (current) to the ion generator 115 made of the carbon fiber 116, a large amount of ions even at a voltage lower than the corona discharge generated by applying a high voltage between the discharge electrode and the corresponding ground electrode. The generation of ozone suppresses the generation of ozone and reduces power consumption. In addition, the carbon fiber 116 has a feature that does not require a ground electrode when generating ions by applying a voltage (current), and has a feature that corrosion does not occur even in a strongly acidic environment by not including a ground electrode made of a metal material. .

In this case, as shown in FIG. 2, the charging unit 110 may include a plurality of ion generators 115. That is, a plurality of long fixing rods 114 extending in the vertical direction are spaced apart at a predetermined interval, and the ion generator 115 can be fixed to each of the fixing rods 114 at predetermined intervals, and the fixing rods A winding for supplying a high voltage to each ion generator 115 from the voltage application device 118 through the inside of 114 may be formed.

That is, as a plurality of the fixing rods 114 are disposed in a horizontal direction perpendicular to the extension direction, the plurality of ion generators 115 may be spaced apart at predetermined intervals on a path surface through which contaminated air flows. At this time, as shown in FIG. 2, by installing the diaphragm 112 around the space in which each ion generator 115 is located, each compartment 113 in which the diaphragm 112 forms the incoming polluted air. ) Can be provided, and the air contaminated by ions generated in the ion generator 115 installed in each compartment 113 is charged. By charging the contaminated air by the ions generated in the ion generator 115 in each of the compartments 113, the charging efficiency of the fine particles can be increased, thereby increasing the dust collection efficiency.

In this case, the space charged by one ion generator 115, that is, the space formed by one compartment 113, may be formed identically, and through this, the charging efficiency of the air flowing as a whole may be constantly improved. I can.

At this time, the carbon fibers 116 of the ion generator 115 may be formed in a direction in which contaminated air flows, but in this embodiment, a direction opposite to the direction in which contaminated air flows, that is, a direction toward contaminated air To charge the fine particles. In this case, as illustrated in FIG. 1, the ion generator 115 may be disposed in a direction opposite to the direction in which the contaminated air flows, not in front of the diaphragm 112 in the direction in which the contaminated air flows. .

At this time, the fixing rod 114 fixing the plurality of ion generators 115 may rotate. When charging the fine particles as shown in FIG. 2, the carbon fibers 116 of the ion generator 115 are positioned so as to face the direction in which air flows, that is, in the direction in which the air is provided. When removing the fine dust accumulated on the carbon fibers 116 of the ion generator 115 as shown in 3, rotate the fixing rod 114 180 degrees to reverse the carbon fibers 116 of the ion generator 115 It can be rotated with The configuration and operation of removing fine dust from the carbon fiber 116 will be described later with reference to FIG. 7.

In this case, the fixing rods 114 may be configured to rotate individually, or a plurality of fixing rods 114 may be configured to rotate integrally at the same time. The configuration for rotating the fixed rod 114 may use a known technique in which the shaft of the fixed rod 114 is rotated by a power means such as a motor (not shown).

The dust collecting unit 120 collects fine particles charged by ions generated from the charging unit 110 on the dust collecting plate 122 by electrostatic force.

As illustrated in FIG. 5, the dust collecting unit 120 generates an electrostatic force by arranging a plurality of dust collecting plates 122 in parallel and spaced apart from each other and forming a potential difference between neighboring dust collecting plates 122a and 122b. Accordingly, the charged particles may be moved by electrostatic force and collected in the dust collecting plate 122. At this time, by alternately disposing a first dust collecting plate 122a to which a high voltage is applied to a plurality of dust collecting plates 122 arranged in parallel and a second dust collecting plate 122b to which a voltage of a ground or opposite polarity is applied, the neighboring dust collecting plates Electrostatic force can be generated by forming a potential difference between the fields 122a and 122b.

In FIG. 5, each of the plurality of dust collecting plates 122 extends in the vertical direction and is arranged in parallel in the horizontal direction. However, in contrast, each of the plurality of dust collecting plates 122 extends in the horizontal direction and may be arranged in parallel in the vertical direction.

In this case, each dust collecting plate 122 may be formed of a film layer 1221 and a coating layer 1222 as shown in FIG. 6. The film layer 1221 is formed of a plastic material in a flexible thin plate shape, and a coating layer 1222 coated with carbon is formed on both sides of the film layer 1221. Therefore, it may be electrically connected through the coating layer 1222. The dust collecting plate 122 configured as described above has ductility that can be easily bent and may be very light. In addition, compared to the conventional dust collecting plate 122 formed of a metal or carbon fiber reinforced plastic (CFRP) material, it can be easily manufactured at a relatively low price.

In particular, in the case of electric dust collectors disposed in subway stations, the number of dust collector plates 122 may be relatively large due to the large capacity and size of the dust collection unit 120, which is composed of a film layer 1221 and a coating layer 1222 as described above. The dust collecting unit 120 can be configured lightly and inexpensively by the dust collecting plate 122.

The high-pressure gas injection unit 130 is disposed in front of the dust collecting unit 120 to inject a high-pressure gas toward the spaced space between the dust collecting plates 122 to separate the fine particles collected on the dust collecting plate 122 from the dust collecting plate 122. Let's do it.

In order to provide a predetermined high-pressure gas to the high-pressure gas injection unit 130, the present embodiment may include a compressor 134 for generating high-pressure gas. In the case of using a fan or a blower, the cleaning efficiency is very low, so it is necessary to inject a high-pressure gas using the compressor 134. At this time, the injection speed of the gas having a critical meaning when cleaning is performed using high-pressure compressed air will be described later with reference to FIG. 10.

In addition, the high-pressure gas injected from the high-pressure gas injection unit 130 forms a flow of gas from the front to the rear to move the separated fine particles to the rear of the dust collecting unit 120. The fine particles separated from the dust collecting plate 122 by the high-pressure gas injection unit 130 and moving backward may be sucked and processed by the suction unit 140 located behind the dust collecting unit 120.

The injection nozzle 132 of the high-pressure gas injection unit 130 may be configured to move in the vertical, left, and right directions. Accordingly, the injection nozzle 132 of the high-pressure gas injection unit 130 moves in the longitudinal direction and the width direction of the dust collecting plate 122 and can perform injection treatment of the high-pressure gas on the entire dust collecting plate 122 disposed in plurality. .

Further, as shown in FIGS. 4A and 4B, by adjusting the injection angle of the injection nozzle 132 constituting the high-pressure gas injection unit 130, the high-pressure gas is reduced to the rear and the front with respect to the direction in which the air flows. By evenly spraying, high-pressure gas can be uniformly sprayed over the entire area of the dust collecting plate 122.

That is, as shown in FIG. 4A, the angle at which the high-pressure gas injected by the injection nozzle 132 enters the dust collecting plate 122 is relatively small, so that the high-pressure gas injected from the injection nozzle 132 is In contrast, as shown in FIG. 4B, the angle at which the high-pressure gas injected by the injection nozzle 132 is drawn into the dust collecting plate 122 is relatively increased to reach the rear portion. By allowing the injected high-pressure gas to reach the front portion of the dust collecting plate 122, the high-pressure gas may evenly reach the front and rear directions.

Further, although not shown in FIG. 4, the angle may be adjusted in the left and right directions instead of vertically based on the dust collecting plate 122 so that the high-pressure gas can reach the dust collecting plate 122 with respect to the left and right entire areas.

In addition, the injection nozzle 132 of the high-pressure gas injection unit 130 may rotate in a horizontal direction as shown in FIG. 7. That is, when removing fine dust from the dust collecting plate 122, the spray nozzle 132 is disposed in front of the dust collecting part 120 toward the dust collecting part 120 to inject a high-pressure gas. On the other hand, in order to remove fine dust accumulated on the charging unit 110 (more specifically, the carbon fiber 116 of the ion generator 115) located in front of the high-pressure gas injection unit 130, the injection nozzle 132 is provided. By rotating 180 degrees, the spray nozzle 132 may be disposed to face the charging unit 110. If dust accumulates on the carbon fiber 116 of the charging unit 110, charging efficiency may drop rapidly. In this embodiment, the high-pressure gas injection unit 130 located behind the charging unit 110 is rotated to rotate the charging unit ( Dust accumulated on the carbon fibers 116 of the charging unit 110 can be removed by injecting a high-pressure gas toward the 110).

At this time, as described above with reference to FIG. 3, when removing the dust accumulated on the carbon fiber 116, the carbon fiber 116 of the ion generator 115 is rotated by rotating the fixing rod 114 so that the high-pressure gas injection unit ( 130).

The suction unit 140 is disposed behind the dust collecting unit 120 and sucks and removes fine particles separated from the dust collecting plate 122 by the high-pressure gas injection unit 130. As shown in FIG. 1, the suction unit 140 forms a negative pressure with a hopper 142 disposed to be close to the dust collection plate 122 from the rear of the dust collection unit 120, and a negative pressure forming unit that sucks and sucks fine particles ( 145).

In this way, the suction unit 140 is formed at the same time as the high-pressure gas injection unit 130, so that the fine particles separated from the dust collecting plate 122 through the high-pressure gas injection unit 130 can be more effectively sucked and removed. have.

At this time, the hopper 142 may be formed in a rectangular shape as shown in FIG. 5, and moves up, down, left and right, and moves to the rear of the dust collecting unit 120 by the high-pressure gas injection unit 130. Particles can be inhaled.

At this time, the injection nozzle 132 of the high-pressure gas injection unit 130 and the hopper 142 of the suction unit 140 are moved so that they are at opposite positions, so that the fine particles can be sucked in the entire area of the dust collecting unit 120. have.

In this case, the shape of the hopper 142 is not limited to that shown, and it is obvious that the size and movement amount of the hopper 142 may be designed in various ways.

Hereinafter, the operation of the electric precipitator 10 according to the present embodiment described with reference to FIGS. 1 to 7 will be described.

When contaminated air flows into the inlet of the housing 100, the fine particles may be charged by ions generated by the charging unit 110. At this time, ions can be generated by applying a high voltage to the ion generator 115 composed of strands of carbon fibers 116, and a large amount of ions can be generated with a relatively low voltage, and ozone generation can be minimized. have.

At this time, as shown in Fig. 2, a plurality of ion generators 115 are spaced apart from the air flow surface, and each ion generator 115 is separated into a compartment 113 using a diaphragm 112. It is possible to maximize the charging efficiency of fine particles. Further, in the present embodiment, the carbon fibers 116 of the ion generator 115 are disposed in a direction opposite to the flow direction of the contaminated air at the rear position of the diaphragm 112 to charge the fine particles.

The charged fine particles move to the rear dust collecting unit 120, and the charged fine particles are generated by generating an electrostatic force by forming a potential difference between neighboring dust collecting plates 122a and 122b in which a plurality of dust collecting plates 122 are spaced apart in parallel. The particles may move and be collected on the dust collecting plate 122.

As described above, fine particles collected in the dust collecting plate 122 are removed after dust is collected by electric dust collection for a predetermined period of time.

At this time, the voltage applied to the dust collecting plate 122a is stopped, and the high-pressure gas injection unit 130 and the suction unit 140 are positioned in front and rear of the dust collecting unit 120, respectively. At this time, the high-pressure gas injection unit 130 or the suction unit 140 may be located in front and rear of the dust collecting unit 120 at all times, and the high-pressure gas injection unit 130 or the suction unit 140 is a path of the housing. It may be configured to be disposed on one side of the top and disposed in front and rear of the dust collecting unit 120 only when the fine particles collected on the dust collecting plate 122 are removed.

The high-pressure gas injection unit 130 injects high-pressure gas toward the spaced space between the dust collection plates 122 to separate the fine particles collected on the dust collection plate 122 from the dust collection plate 122 and form a flow from the front to the rear. The separated fine particles are moved to the rear of the dust collecting unit 120. At this time, the suction unit 140 located at the rear of the dust collecting unit 120 sucks and processes the fine particles by negative pressure.

At this time, the injection nozzle 132 of the high-pressure gas injection unit 130 and the hopper 142 of the suction unit 140 are respectively controlled to move up, down, left and right so that they are in opposite positions, and the entire area of the dust collecting unit 120 (the entire dust collecting plate For (122)), fine particles can be treated.

In addition, the electric dust collector 10 according to the present embodiment may also remove fine particles accumulated on the carbon fibers 116 of the charging unit 110. When fine particles accumulate on the carbon fibers 116, charging efficiency decreases sharply, so it is necessary to periodically remove the fine particles accumulated on the carbon fibers 116.

At this time, as shown in FIGS. 3 and 7, the fixed rod 114 is rotated 180 degrees, and the spray nozzle 132 of the high-pressure gas injection unit 130 is also rotated 180 degrees, so that the injection nozzle of the high-pressure gas injection unit 130 The fine particles accumulated on the carbon fibers 116 may be removed by disposing 132 so as to face the carbon fibers 116 and by injecting a high-pressure gas from the spray nozzle 132 toward the carbon fibers 116. In this case, the spray nozzle 132 may be moved vertically, horizontally, and an operation to remove fine dust may be performed with respect to the plurality of ion generators 115.

Hereinafter, an electric precipitator 11 according to another embodiment of the present invention will be described with reference to FIGS. 8 and 9.

8 is a schematic diagram showing a schematic configuration of an electric precipitator according to another embodiment of the present invention. 9 is a schematic diagram showing a dust collecting unit of FIG. 8.

The electric dust collector 10 described above with reference to FIGS. 1 to 7 has been described as a two-stage electric dust collector in which the charging unit 110 and the dust collecting unit 120 are separated according to the flow direction of air. The dust collector 11 is a single-stage electric dust collector in which the charging unit 110 and the dust collecting unit 120 are not separated. Accordingly, the same reference numerals are used for the same components, and redundant descriptions thereof are omitted.

8 and 9, in the electric dust collector 11 according to the present embodiment, a configuration in which a plurality of dust collecting plates 122 are arranged in parallel is the same as in the above-described embodiment. A plurality of discharge pins 123 protruding in a pointed shape are formed at an edge or an outer edge of a hole formed in the plate surface of the dust collecting plate 122 to which a high voltage is applied. Accordingly, when a high voltage is applied to the dust collecting plate 122, ions can be generated through the discharge pins 123 at the tip. Further, the dust collecting plate 122a to which the high voltage is applied forms a potential difference with the neighboring dust collecting plate 122b to move fine particles charged by ions generated through the discharge pins 123 to the neighboring dust collecting plate 122b to collect dust. Let's do it.

Since the configurations of the high-pressure gas injection unit 130 and the suction unit 140 are the same as those of the above-described embodiment, a detailed description thereof will be omitted.

10 is a graph showing the experimental results of measuring the cleaning efficiency versus the flow rate of the gas injected from the injection nozzle.

[Table 1] below shows the results of testing the dust removal efficiency in the dust collecting unit 120 with different flow rates using the spray nozzle 132 made of an oval SUS tube. At this time, the cleaning time was 100 seconds, and the same experiment was performed. In addition, a cleaning experiment was performed while using two spray nozzles 132 of the same size at the same time.

Nozzle type	Cleaning time (sec)	Flow velocity (m/s)	Removal efficiency (%)
Oval 1/2 SUS tube	100	484.7	93.8
Oval 1/2 SUS tube	100	359.2	92.9
Oval 1/2 SUS tube X2	100	354.4	90.0
Oval 1/2 SUS tube X2	100	316.1	92.9
Oval 1/2 SUS tube	100	287.4	93.8
Oval 1/2 SUS tube X2	100	291.2	90.9
Oval 1/2 SUS tube X2	100	262.9	88.2
Oval 1/2 SUS tube	100	244.3	92.9
Oval 1/2 SUS tube X2	100	222.7	64.3
Oval 1/2 SUS tube	100	220.3	68.8
Oval 1/2 SUS tube	100	191.6	69.2
Oval 1/2 SUS tube X2	100	71.8	53.3

In the pipe leading from the compressor 134 to the injection nozzle 132, a flow meter was installed at a position 38 cm rear from the end of the injection nozzle 132 to measure the flow rate, and a pressure meter was installed at a position 30 cm rear from the flow meter. The pressure of the injected gas was measured. The flow rate of the injected gas can be obtained by using the measured flow rate, pressure, and the cross-sectional area of the spray nozzle 132, and the results of the experiment on the removal efficiency of the dust collecting unit 120 according to the flow rate are shown in [Table 1]. Fig. 10 is shown as a graph.

That is, as shown in the graph of FIG. 10, regardless of the number of spray nozzles 132 used for cleaning, when the flow velocity of the sprayed gas is approximately 250 m/s or more, it can be confirmed that the cleaning efficiency reaches a value close to 90%. . Accordingly, when cleaning the dust collecting unit dry according to the present embodiments, the shape of the spray nozzle 132 and the flow rate of the gas discharged from the spray nozzle 132 have a greater influence on the cleaning efficiency than the flow rate of the gas. At this time, it is desirable to inject the gas at a speed of at least 250 m/s.

11 is a schematic diagram showing an air purification system of a subway station according to another embodiment of the present invention. 12 is a schematic diagram showing the air purifier of FIG. 11.

The air purification system 20 of a subway station according to the present embodiment is to which the electric dust collectors 10 and 11 according to the embodiments described with reference to FIGS. 1 to 10 are applied, and the electric dust collectors 10 and 11 ) Can be applied to various locations of the air purification system 20 of the subway station.

However, for convenience of explanation, it has been described that the electric dust collector 10 described with reference to FIG. 1 is applied to the air purification system 20 of the subway station, but the electric dust collector 11 described with reference to FIG. 8 It is obvious that it can be applied.

Further, for convenience of description, the same reference numerals have been used for the same components as those of the electrostatic precipitator 10 described above, and redundant descriptions will be omitted.

More specifically, referring to FIGS. 11 and 12, the air purification system 20 of a subway station according to the present embodiment includes an air supply unit 30, an electric dust collector 10, an exhaust unit 50, and a control unit (not shown). ) Can be included.

The air supply unit 30 sucks clean air from the ground into the basement. In this case, the air introduced through the air supply unit 30 may not be directly introduced into an underground space such as a waiting room or a platform, but may be introduced after being purified by the electric precipitator 10.

The air supply unit 30 may be interpreted as including a duct connected to the electric precipitator 10 from an air intake tower formed on the ground and components within the duct.

A fan or a pump (not shown) for introducing external air into the air supply unit 30 may be formed. In addition, a pretreatment filter 32 may be disposed in the air supply unit 30 to filter out dust having relatively large particles in the incoming air. Fine particles that have passed through without being collected by the pretreatment filter 32 may be collected and processed by the electric precipitator 10 at the rear.

An air supply damper 34 is formed at the inlet of the electric precipitator 10 at the end of the air supply unit 30 to control the flow rate of air flowing into the electric precipitator 10 from the air supply unit 30. The external relatively clean air is diluted with the contaminated air inside the underground space and supplied to the electric dust collector 10, but depending on the condition of the outside air or the air inside the underground space, the control unit determines the opening/closing amount of the air supply damper 34 You can control the amount of incoming air by controlling it.

The electric dust collector 10 includes a dust collector 120, a high-pressure gas injection unit 130, and a suction unit 140 as described above, and the electric dust collector 10 further includes a heat exchanger 160. I can.

As described above, the electrostatic precipitator 10 receives external air introduced from the air supply unit 30 and contaminated air introduced from an underground space such as a waiting room and a platform, and purifies it, and supplies the purified air to the underground space. In the present embodiment, a waiting room or a platform, which is a large-scale space in a subway station, is described as an example of an underground space, but is not limited thereto and may be broadly interpreted as including a large-scale underground space requiring air purification, such as an underground shopping mall.

A recycling duct 15 connecting the underground space and the electric precipitator 10 may be formed to supply contaminated air in the underground space to the electric precipitator 10, and the air in the underground space may be provided in the recycling duct 15. A pump or fan (not shown) that is sucked and supplied to the electric dust collector 10 may be formed.

In this embodiment, an electric dust collector 10a that purifies the air in the waiting room and an electric dust collector 10b that purifies the air in the platform are respectively formed. It is also possible to perform purification treatment by receiving air together.

A recycling damper 16 is formed at the inlet of the electric dust collector 10 at the end of the recycling duct 15 to control the flow rate of air flowing into the electric dust collector 10 from the underground space.

The control unit can control the operation of the air supply damper 34 and the recycling damper 16, for example, 30% of the air flowing into the electric dust collector 10 allows external air to be introduced through the air supply unit 30. The remaining 70% can allow contaminated air from underground spaces to enter. In addition, when the pollution degree of the external air is high, it is preferable to control the air supply damper 34 so that the flow rate of the external air introduced from the air supply unit 30 is reduced. The relatively clean outside air is diluted with the contaminated air inside the underground space and supplied to the electric dust collector 10, but the control unit supplies air according to the condition of the outside air or the air inside the underground space measured from the sensor (S). By controlling the amount of opening and closing of the damper 34 and the recycling damper 16, the amount of air flowing into the electric precipitator 10 may be controlled.

A pretreatment filter 170 for filtering dust having relatively large particles may be disposed inside the electric dust collector 10.

A dust collecting unit 120 may be disposed behind the pretreatment filter 170. The dust collecting unit 120 collects and processes charged fine particles on the dust collecting plate 122 by electrostatic force. In this embodiment, the electric dust collector 10 may use a two-stage dust collector in which a charging unit 110 for charging fine particles and a dust collecting unit 120 for collecting charged fine particles are separated. That is, the charging unit 110 emits ions having a + or-polarity, and fine particles collide with the ions so that the fine particles may be charged. As shown in FIG. 11, the charging unit 110 is a recycling duct in the front end of the dust collecting unit 120 inside the electric precipitator 10, inside the duct of the air supply unit 30, inside the recycling duct 15, or in an underground space. (15) It may be formed in at least one of the inlet to be connected. As described above, since the high-pressure gas injection unit 130 and the suction unit 140 are disposed in front and rear of the dust collector 120, the space inside the electric dust collector 10 is very narrow. Accordingly, in the present embodiment, the electric precipitator 10 may solve a problem due to the narrow space inside the electric precipitator 10 by disposing the charging unit 110 at various locations on the path through which the air that needs to be purified is introduced through the dust collecting unit 120.

In particular, as the charging unit 110 is disposed on various paths through which air is introduced into the dust collecting unit 120 as in the present embodiment, that is, the charging unit 110 is spaced apart from the dust collecting unit 120 from each other. As it is arranged, it is possible to relatively improve the effect of dust collection.

That is, in general, increasing the charging time is important in improving the dust collection efficiency.In the case where the conventional charging unit and the dust collecting unit are integrally formed or attached together, a high voltage must be applied to improve the dust collection efficiency. As well as increasing the amount of occurrence, there was a problem of increasing the risk of fire.

Thus, in the case of the present embodiment, by positioning the charging unit 110 to be relatively spaced apart from the dust collecting unit 120, the charging time can be relatively increased indefinitely, and accordingly, a separate high voltage is not applied. Even if not, it is possible to improve the dust collection efficiency.

That is, in this embodiment, the charging unit 110 may be disposed at a plurality of positions among the above-listed positions, and accordingly, the charging unit 110 on various paths through which contaminated air flows, as in the present embodiment. By dispersing, it is possible to lower the intensity of the voltage applied to each charging unit 110, thus suppressing ozone generation and lowering the risk of fire.

A heat exchanger 160 may be formed at the rear of the dust collector 120 to lower or increase the temperature of the air purified by the dust collector 120 for cooling and heating the underground space.

The exhaust part 50 discharges air in the underground space to the outside. In this case, the amount of air discharged through the exhaust unit 50 may be controlled equal to the amount of air introduced through the air supply unit 30, but is not limited thereto.

The exhaust part 50 may be interpreted as including a duct connecting an air outlet tower formed on the ground and an underground space as shown in FIG. 11 and a component within the duct.

A fan or a pump (not shown) may be formed in the exhaust unit 50 to discharge air inside the underground space to the outside. In addition, an exhaust damper 52 for controlling a flow rate of air discharged from the underground space to the outside may be formed at the entrance of the exhaust part 50 connected to the underground space. Opening and closing of the exhaust damper 52 is also controlled by the control unit.

In FIG. 11, the exhaust part 50 is disposed to be directly connected to the underground space, but may be formed in a form branching from the middle part of the recycling damper 16 as shown in FIG. 12.

The control unit (not shown) is a control device that controls the entire system, and according to the air condition inside or outside the subway station measured from the sensor S, the charging unit 110, the dust collecting unit 120, and the high-pressure gas injection unit ( 130), the suction unit 140, the heat exchanger 160, the dampers 15, 32, 52, etc. are controlled.

Meanwhile, the charging unit 110, the dust collecting unit 120, the high-pressure gas injection unit 130, and the suction unit 140, which are main components of the electric dust collector 10, will be described in detail with reference to FIGS. 1 to 10 As mentioned above, redundant descriptions will be omitted.

However, hereinafter, the dust collecting unit 120 will be described in more detail with reference to FIGS. 13 to 18.

13 is a side view illustrating the dust collecting unit of FIG. 11. 14 is a perspective view showing the shield of FIG. 13. 15 is a perspective view illustrating the first dust collecting plate of FIG. 13. 16 is a perspective view illustrating a second dust collecting plate of FIG. 13. 17 is a perspective view illustrating a state in which the first dust collecting plate and the second dust collecting plate of FIGS. 15 and 16 are electrically connected to the fixing unit. 18 is an exploded perspective view of FIG. 17.

13 to 18, as described above, in the dust collecting unit 120, a first dust collecting plate 122a to which a high voltage is applied, and a second dust collecting plate 122a to which a high voltage is applied and a voltage having a polarity different from that of the ground or first dust collecting plate 122a is applied. The dust collecting plates 122b are alternately spaced apart from each other in parallel to improve dust collection efficiency.

The first dust collecting plate 122a and the second dust collecting plate 122b are accommodated in the chamber 200. At this time, by the shielding plate 205 formed in the chamber 200, the internal space of the chamber 200 may be divided into an electrical connection space 210 and a dust collection space 220.

In the present invention, the chamber 200 may be divided into a first chamber 201 and a second chamber 202, wherein one side of the first chamber 201 is open to form an electrical connection space 210, and a second Like the first chamber 201, the chamber 202 is opened at one side and forms a dust collecting space 220. Accordingly, the chamber 200 for accommodating the dust collecting plate 122 may be configured by facing the open side of both chambers 201 and 202 and fastening them with bolts 208. At this time, in this embodiment, by interposing the shield plate 205 between the first chamber 201 and the second chamber 202 are coupled, the space inside the chamber 200 is connected to the electrical connection space 210. It can be separated into a dust collection space 220.

As shown in FIG. 14, the shielding plate 205 is formed with a plurality of screw holes 206 through which the bolts 208 pass when the first chamber 201 and the second chamber 202 are coupled.

In addition, the shielding plate 205 is formed with a plurality of slit holes 207 through which the first dust collecting plate 122a and the second dust collecting plate 122b pass, and the slit holes 207 are The first and second dust collecting plates 122a and 122b may have a rectangular shape similar to the cross-sectional shape of the first and second dust collecting plates 122a and 122b.

15 and 16, in this embodiment, a first electrical connection part 1226a is inserted into the fixing slot 129 at one end of the first dust collecting plate 122a to electrically connect the first dust collecting plate 122a to the outside. ) Is formed, and a second electrical connection part 1226b is formed that is inserted into the fixing slot 129 at one end of the second dust collecting plate 122b to electrically connect the second dust collecting plate 122b to the outside.

Therefore, when the first dust collecting plate 122a and the second dust collecting plate 122b are inserted into the slit hole 207, the first electric connection part 1226a and the second electric connection part 1226b at the upper end are formed in the upper electric connection space ( The first main plate part 1225a and the second main plate part 1225b which are located in the 210 and collect charged fine particles are located in the dust collecting space 220 in the chamber 200.

Accordingly, in the present embodiment, it is possible to block the microparticles in the dust collecting space 220 from flowing into the electrical connection space 210 by the shielding plate 205. In the cleaning process of the dust collection plate 122, the fine particles separated from the dust collection plate 122 by the high-pressure gas injection unit 130 may accumulate and contaminate the area electrically connecting the dust collection plate 122 to the outside. When it becomes, it causes a risk of fire. Accordingly, in the present embodiment, by separating the inner space of the chamber 200 accommodating the dust collecting plate 122 by the shielding plate 205, this can be blocked.

In particular, in this embodiment, a positive pressure forming part 150 for supplying gas into the electrical connection space 210 to form a positive pressure is formed, and a slit hole formed in the shielding plate 205 by the pressure in the electrical connection space 210 It is also possible to completely block the inflow of fine dust into the fine gap between the 207 and the dust collecting plate 122.

In the chamber 200, a gap maintaining portion 203 in which a plurality of slit holes are formed may be formed such as the shielding plate 205 so as to maintain a constant gap between the plurality of dust collecting plates 122. In this case, the spacing maintaining unit 203 may be provided in various numbers at predetermined intervals in consideration of the length or spacing of the dust collecting plates 122.

In addition, in the present embodiment, both the first electrical connection 1226a of the first dust collecting plate 122a and the second electrical connection 1226b of the second dust collecting plate 122b are disposed on one side of the chamber 200. That is, a shielding plate 205 is formed at the upper and lower portions of the chamber 200, respectively, so that the first electrical connector 1226a of the first dust collecting plate 122a is electrically connected to the upper side, and the second electrical connection part 1226a is formed at the lower side. Instead of forming a configuration that electrically connects the second electrical connection portion 1226b of the dust collecting plate 122b, a single shielding plate 205 is formed on the upper end of the chamber 200, and the first dust collecting plate 122a The first electrical connection 1226a and the second electrical connection 1226b of the second dust collecting plate 122b are both electrically connected to the outside in the electrical connection space 210 on one side of the chamber 200. Accordingly, in the present embodiment, space efficiency can be improved compared to the case where the electrical connection space 210 is formed in the upper and lower portions of the chamber 200 with respect to the first dust collecting plate 122a and the second dust collecting plate 122b.

To this end, in the present embodiment, the first dust collecting plate 122a is a first main plate part 1225a and a first electrical connection part 1226a extending from the first main plate part 1225a, as shown in FIG. 15. Is formed. In this case, the first electrical connection part 1226a extends from the upper end of the rectangular first main plate part 1225a to a width narrower than that of the first main plate part 1225a, and the first main plate part 1225a It is formed in a skewed shape on one side of ).

Similarly, as shown in FIG. 16, the second dust collecting plate 122b is formed of a second main plate part 1225b and a second electrical connection part 1226b like the first dust collecting plate 122a. In this case, the second dust collecting plate 122b extends to a width narrower than the width of the second main plate part 1225b, opposite to the first dust collecting plate 122a, and is located on the other side of the second main plate part 1225b. It is formed in a skewed shape.

That is, as shown in FIGS. 17 and 18, when the plurality of first dust collecting plates 122a and the plurality of second dust collecting plates 122b are alternately spaced apart as described above, the upper end of the dust collecting plate 122 In the first electrical connector 1226a is positioned on one side, and the second electrical connector 1226b is positioned on the other side, there is no overlapping area or the overlapping area is minimized when viewed from the side.

At this time, a first fixing part 128a for applying a high voltage by electrically connecting the plurality of first dust collecting plates 122a is formed at the upper end of the first dust collecting plate 122a, as shown in FIGS. 17 to 18 Likewise, the first fixing part 128a is a fixing slot for electrically connecting by inserting the first electrical connection part 1226a into a plate member having a width corresponding to the arrangement width of the dust collecting plates 122 disposed a plurality of spaced apart. 129) is formed with a plurality of spaced apart. Therefore, by configuring to electrically connect all between the plurality of fixing slots 129, a high voltage is supplied to the first fixing part 128a, so that a high voltage can be simultaneously applied to the plurality of first dust collecting plates 122a. There can be.

In this case, the fixing slot 129 can be elastically deformed laterally when the electrical connectors 1266a and 1266b are inserted adjacent to the fixing block 1291 protruding in the vertical direction from the plate member and the fixing block 1291 It is composed of an elastic plate 1292 protruding so that the elastic plate 1292 is formed of a conductive material so that the electrical connection portions 1266a and 1266b are inserted between the fixing block 1291 and the elastic plate 1292 to be fixed. At this time, the electrical connection portions 1266a and 1266b in contact with the elastic plate 1292 may be electrically connected to the outside through the elastic plate 1292.

Meanwhile, the configuration of the second fixing part 128b for electrically connecting the second dust collecting plate 122b is substantially the same as the configuration of the first fixing part 128a.

In this case, the first fixing part 128a is disposed on one side in the electrical connection space 210, and the second fixing part 128b is disposed on the other side in the electrical connection space 210, It is possible to block the occurrence of electrical interference between the first fixing portion (128a) and the second fixing portion (128b).

Further, as described with reference to FIGS. 15 and 16, the first electrical connection part 1226a protrudes from one side of the upper end of the first dust collecting plate 122a, and the second electrical connection part 1226b includes the second dust collecting plate 122b. ) By minimizing and spaced apart portions overlapping each other so as to protrude from the other side of the upper end, thereby minimizing physical interference and electrical interference between the first dust collecting plate 122a and the second dust collecting plate 122b. 19A is a schematic diagram showing a dust collecting unit according to another embodiment of the present invention, FIG. 19B is an enlarged cross-sectional view of a portion'B' of FIG. 19A, and FIG. 19C is an enlarged view of a portion'C' of FIG. 19A FIG. 19D is a cross-sectional view showing an enlarged portion'D' of FIG. 19A. 20A and 20B are plan views illustrating one surface of a first dust collecting plate and one surface of a second dust collecting plate as an example of FIG. 19A, respectively. 21A and 21B are plan views illustrating the other surface of the first dust collecting plate and the other surface of the second dust collecting plate as an example of FIG. 19A.

In the case of the dust collecting unit 120 according to the present embodiment, a different configuration from the dust collecting unit 120 described with reference to FIGS. 13 to 18 will be described below.

First, referring to FIGS. 19A and 19B, in the dust collecting unit 120 according to the present embodiment, at least one or more first fixing rods 1229a for fixing a plurality of first dust collecting plates 122a to each other while maintaining a constant interval. ) And the plurality of second dust collection plates 122b are disposed inside the chamber 300 by at least one second fixing rod 1229b that fixes each other while maintaining a constant distance.

At this time, as shown in Figs. 20A and 21A, the fixing hole 1227a fixed to the first fixing rod 1229b and the second fixing rod 1229b are spaced apart and passed through the first dust collecting plate 122a. At least one through hole 1228a or a through hole 1228a having a relatively large diameter (a groove cut in the shape of a semicircle on the upper side of the first dust collecting plate 122a in the drawing) may be formed, respectively. Further, although not shown, the fixing hole 1227a may also be formed in the form of a fixing groove cut in a semicircular shape at the edge of the first dust collecting plate 122a.

In addition, as shown in FIGS. 20B and 21B, the first fixing rod 1229a is spaced apart and passed through the second dust collecting plate 122b at a position corresponding to the fixing hole 1227a of the first dust collecting plate 122a. A through hole 1228b is formed to allow the second fixing rod 1229b to be fixed at a position corresponding to the through hole 1228a of the first dust collecting plate 122a or the through hole 1228a. Each of these may be formed at least one or more. As in the description of the first dust collecting plate 122a, the second dust collecting plate 122b may also be formed in the form of a fixing groove or a through groove at the edge of the second dust collecting plate 122b according to the design.

In the present embodiment, it is exemplified that the first fixing rod 1229a and the second fixing rod 1229b are formed to penetrate the upper, middle, and lower portions of the dust collecting plates 122a and 122b, respectively, but the first fixing rod ( The number of 1229a) and the second fixing rod 1229b is not limited thereto. That is, if the size and number of the dust collecting plates 122a and 122b are large, the number of the first fixing rods 1229a and the second fixing rods 1229b may increase, and conversely, the size of the dust collecting plates 122a and 122b is small and the number of If is small, the number of the first fixing rod 1229a and the second fixing rod 1229b may be smaller.

Accordingly, the first fixing rod 1229a is formed to be inserted into the fixing holes 1227a of the first dust collecting plate 122a and the through holes 1228b of the second dust collecting plate 122b formed in plural, but the diameter The large through-hole 1228b is not in contact, but spaced apart, so that the first dust-collecting plate 122a is in contact and supported without contacting the second dust-collecting plate 122b. Accordingly, the plurality of first dust collecting plates 122a may be electrically connected by contacting through the first fixing rod 1229a, but may be electrically separated from the second dust collecting plate 122b.

Further, the second fixing rod 1229b is formed to be inserted into the through holes 1228a of the first dust collecting plate 122a and the fixing holes 1227b of the second dust collecting plate 122b formed in plural, but the diameter The large through-hole 1228a is not in contact with but is spaced apart so that the second dust collecting plate 122b is in contact and supported without contacting the first dust collecting plate 122a. Accordingly, the plurality of second dust collecting plates 122b may be electrically connected by contacting through the second fixing rod 1229a, but may be electrically separated from the first dust collecting plate 122a.

At this time, any one of the plurality of first fixing rods 1229a may be connected to the high voltage generator outside the chamber 300. When a high voltage is applied to the first fixing rod 1229a, the first fixing rod 1229a A high voltage may be simultaneously applied to the plurality of first dust collecting plates 122a in contact with the.

Likewise, one of the plurality of second fixing rods 1229b is grounded from the outside of the chamber 300 so that the plurality of second dust collecting plates 122b in contact with the second fixing rod 1229b are simultaneously grounded. There can be.

In this embodiment, the plurality of dust collecting plates 122a and 122b do not contact any other components including the chamber 300 except for contact with the first fixing rod 1229a or the second fixing rod 1229b. Therefore, by drying only the portion outside the chamber 300 to which the first fixing rod 1229a and the second fixing rod 1229b are electrically connected, the first dust collecting plate 122a and the second dust collecting plate 122b are It can prevent energization. Accordingly, in the present embodiment, it is possible to easily block the occurrence of a fire due to energization between the first dust collecting plate 122a and the second dust collecting plate 122b due to a humid environment.

At this time, as shown in FIGS. 19C, 20A, and 20B, the first dust collecting plate 122a or the second dust collecting plate 122b is coated on at least one surface of a film layer of plastic P with carbon (C). It can be formed in the form of a coating layer. Accordingly, the coating layer formed of carbon (C) may be electrically connected by contacting the first fixing rod 1229a or the second fixing rod 1229b through the fixing holes 1227a and 1227b. At this time, the dust collecting plate 122 of the present embodiment may be relatively flexible and relatively light. In addition, the manufacturing method is very simple, and there is an advantage in that the corrosion resistance is high compared to the case where the dust collecting plate 122 is formed of a metal plate.

19B shows an example of a configuration that is fixed to the first fixing rod 1229a through the fixing hole 1227a of the first dust collecting plate 122a and electrically connected to the first fixing rod 1229a. As shown, the first fixing rod 1229a is not formed integrally, but a plurality of first fixing rod piece members 1229_1a, 1229_2a, 1229_3a may be screwed in a row. One side of the first fixed rod piece members 1229_1a, 1229_2a, 1229_3a has a screw thread formed externally in the axial direction to protrude, and the other side of the first fixed rod piece members 1229_1a, 1229_2a, 1229_3a A threaded groove portion is formed on the inside of which a thread is formed. Accordingly, the first fixing rod 1229a may be configured by connecting the plurality of first fixing rod piece members 1229_1a, 1229_2a, 1229_3a in a row by screwing the screw portion to the screw groove. At this time, a screw part is inserted into the fixing hole 1227a to fix the first dust collecting plate 122a between the adjacent two first fixing rod piece members, and the edge of the fixing hole 1227a formed of the coating layer is the first It may be electrically connected by contacting the fixed rod 1229a.

Meanwhile, the configuration of the second fixing rod 1229b and the configuration of fixing the second dust collecting plate 122b through the second fixing rod 1229b and electrically connecting the second dust collecting plate 122b also include the first fixing rod 1229a. ) And the configuration of the first dust collecting plate 122a, a description thereof will be omitted.

In addition, as shown in FIG. 19D, the first dust collecting plate 122a or the second dust collecting plate 122b forms a first coating layer in which at least one surface is coated with carbon (C) on the film layer of plastic (P), It may be formed as a second coating layer covering the first coating layer by coating it with plastic (P) again on the first coating layer. For reference, FIG. 19D shows a form in which a first coating layer and a second coating layer are formed on both sides of the film layer.

At this time, as shown in Figs. 20A and 20B, the second coating layer formed on one surface of the first dust collecting plate 122a and the second dust collecting plate 122b is made to protrude a predetermined distance out of the first coating layer formed of carbon. It is preferable that it is formed to cover the first coating layer with a cross-sectional area wider than that of the first coating layer. This prevents the first coating layer, especially the edge of the first coating layer from being exposed, so that when a high voltage is applied to the dust collecting plate 122, no spark is generated in the dust collecting plate 122 and is electrically stabilized.

21A and 21B, the second coating layer formed on the other surfaces of the first dust collecting plate 122a and the second dust collecting plate 122b does not cover the entire first coating layer, but a part of the first coating layer (upper or lower part) Is exposed so that it can be electrically connected to the first fixing rod 1229a or the second fixing rod 1229b.

At this time, the second coating layer is not formed at the lower end of the first dust collecting plate 122a, so that a part of the first coating layer formed of carbon is exposed, and the fixing hole 1227a formed in the exposed first coating layer and the fixing hole 1227a are A high voltage may be applied to the plurality of first dust collecting plates 122a through the coupled first fixing rod 1229a. In addition, a fixing hole 1227b formed in the exposed first coating layer by exposing a part of the first coating layer formed of carbon to the upper end of the second dust collecting plate 122b and a second fixing rod coupled to the fixing hole 1227b ( The plurality of second dust collecting plates 122b may be grounded through 1229b).

Even on the other surfaces of the dust collecting plates 122a and 122b where a part of the first coating layer is exposed, the edge of the first coating layer exposed without being coated by the second coating layer may be coated with a separate insulating material. Alternatively, the edge may be shielded using an insulating tape.

The dust collecting plates 122a and 122b in this embodiment are very light as in Fig. 19C, and the manufacturing process is relatively simple. In addition, compared to FIG. 19C, there is a disadvantage in that the electrostatic force is slightly lowered by the second coating layer made of plastic (P), but there is an advantage that the second coating layer covers the first coating layer, so that the corrosion resistance is very high.

The first dust collecting plate 122a and the second dust collecting plate 122b do not necessarily have to be formed in the same shape, and the first dust collecting plate 122a is shown in FIG. 19C, and the second dust collecting plate 122b is shown in FIG. 19D. In addition, the first dust collecting plate 122a may be formed in the shape shown in FIG. 19D, and the second dust collecting plate 122b may be formed in the shape shown in FIG. 19C. Furthermore, the second dust collecting plate 122b may be formed of a metal plate.

The size of the first dust collecting plate 122a to which the high voltage is applied is formed to be about 10% smaller than that of the second dust collecting plate 122b, so that the first dust collecting plate 122a is in the middle between the adjacent two second dust collecting plates 122b. It is desirable to be placed in.

In addition, even when forming the dust collecting plate 122 with a plastic film layer and a carbon coating layer as shown in FIG. 19C, it is preferable to coat carbon in the film layer so that the area of the film layer is larger than the area of the coating layer, and the carbon layer It is preferable that the edge of the material is separately coated with an insulating material or shielded with an insulating tape.

Meanwhile, since the detailed operation of the electric precipitator 10 is substantially the same as the operation of the electric precipitator described with reference to FIG. 1, a redundant description will be omitted.

As described above, according to the electrostatic precipitator according to the embodiments of the present invention, since the fine particles are collected by the electrostatic precipitating method without using a filter, the cost of replacing the filter can be reduced, and the high-pressure gas injection unit and the suction unit are used. Thus, there is an advantage in that the fine particles collected on the dust collecting plate can be removed inexpensively and easily.

In addition, since it is possible to disperse the charged parts over the entire system, it is possible to reduce the magnitude of the voltage applied to each charging part, thereby reducing ozone generation and reducing the risk of fire.

In addition, there is an advantage in that the dust collection plate can be constructed lightly and inexpensively by forming the dust collection plate by coating carbon on the flexible plastic film layer.

In addition, there is an advantage in that it is possible to remove fine dust accumulated on the carbon fiber of the charged part by using a high-pressure gas injection part for removing the fine dust collected in the dust collecting part.

In addition, by separating the dust collection space where dust is collected in the chamber accommodating the dust collection unit and the electrical connection space to which the dust collection plate is electrically connected through a shielding plate, a fire occurs due to contamination by fine dust in the area where the dust collection plate is electrically connected. There is also the advantage of being able to solve the problem.

In addition, there is an advantage in that space efficiency can be improved by enabling all of the plurality of first dust collecting plates to which a high voltage is applied and the plurality of second dust collecting plates to be grounded to be electrically connected at one side of the chamber.

The scope of the present invention is not limited to the above-described embodiments, but may be implemented in various forms within the scope of the appended claims. Anyone of ordinary skill in the technical field to which the present invention belongs without departing from the gist of the present invention claimed in the claims is considered to be within the scope of the description of the claims of the present invention to various ranges that can be modified.

Claims (20)

1. In an electric dust collector that collects charged fine particles by charging contaminated air,

   A dust collecting unit for collecting the charged fine particles by electrostatic force;

   A high-pressure gas injection unit for injecting a high-pressure gas from one side of the dust collecting unit toward the fine particles collected in the dust collecting unit; And

   An electric dust collector comprising a suction unit configured to suck fine particles separated from the dust collecting unit by the high-pressure gas injection unit at the other side of the dust collecting unit.
2. The method of claim 1,

   The high-pressure gas injection unit is angle-adjustable and includes a spray nozzle for injecting a high-pressure gas,

   The suction unit includes a hopper,

   The electric dust collector, characterized in that the spray nozzle and the hopper move so as to be at positions opposite to each other.
3. The method of claim 1,

   In the dust collecting unit, a plurality of dust collecting plates are arranged spaced apart in parallel, and a potential difference is formed between neighboring dust collecting plates,

   The high-pressure gas injection unit is disposed on one side of the dust collecting unit through which fine particles are introduced, and the suction unit is disposed on the other side of the dust collecting unit so as to face the high-pressure gas injection unit.
4. The method of claim 3,

   The dust collecting plate includes a first dust collecting plate to which a high voltage is applied, and a second dust collecting plate collecting fine particles charged by an electrostatic force formed by a potential difference with the first dust collecting plate,

   An electric precipitator, characterized in that at least one discharge pin is formed at an edge of the first dust collecting plate.
5. The method of claim 1,

   An ion generator including carbon fibers and a voltage applying device for applying a high voltage to the carbon fibers, further comprising a charging unit disposed in front of the dust collecting unit,

   The high-pressure gas injection unit is disposed between the charging unit and the dust collecting unit to inject a high-pressure gas toward the charging unit to remove fine particles accumulated on the carbon fiber.
6. The method of claim 5,

   A plurality of the ion generators are spaced apart from at least one fixing rod,

   When charging the fine particles, rotate the fixing rod so that the ion generator faces the direction in which contaminated air is introduced,

   When removing the fine particles accumulated on the carbon fiber, the electric dust collector, characterized in that rotating the fixed rod so that the ion generator faces the high-pressure gas injection unit.
7. The method of claim 1,

   The dust collecting unit

   A plurality of first dust collecting plates to which a high voltage is applied and spaced apart in parallel, and having a first electrical connection part electrically connected to one end thereof;

   A plurality of second dust collecting plates disposed between the first dust collecting plates to form a potential difference with the neighboring first dust collecting plates, and having a second electrical connection part electrically connected at one end thereof;

   A chamber accommodating the first and second dust collecting plates and having an inlet through which air is introduced; And

   And a shielding plate separating a dust collecting space for collecting air introduced from the inlet in the chamber and an electrical connection space to which the first and second electrical connectors are electrically connected.
8. The method of claim 7,

   The chamber is

   A first chamber having one side open and forming the electrical connection space;

   One side is open and forms the dust collecting space, and includes a second chamber coupled to the first chamber,

   The shielding plate is an electric dust collector, characterized in that interposed between the first chamber and the second chamber.
9. The method of claim 7,

   The first electrical connection part and the second electrical connection part are disposed in the electrical connection space,

   And a positive pressure forming unit configured to supply gas into the electrical connection space to form a pressure.
10. The method of claim 7,

    The first dust collecting plate includes a first main plate part located in the dust collecting space and connected to an end of the first electric connection part,

    The second dust collecting plate includes a second main plate part located in the dust collecting space and connected to an end of the second electric connection part,

    The first electrical connection part extends to one side of the first main plate part with a width narrower than that of the first main plate part,

    And the second electrical connection part extends to the other side of the second main plate part with a width smaller than that of the second main plate part.
11. The method of claim 10,

    A first fixing part formed on one side of the electrical connection space, and having a plurality of fixing slots formed therebetween by inserting the first electrical connection part to electrically connect the first dust collecting plates; And

    The electric dust collector further comprising a second fixing part formed on the other side of the electrical connection space, and having a plurality of fixing slots spaced apart from each other by inserting the second electrical connection part to electrically connect the second dust collecting plates.
12. The method of claim 7,

    A first fixing rod fixed through the chamber and fixing the plurality of first dust collecting plates; And

    And a second fixing rod fixed through the chamber and fixing the plurality of second dust collecting plates,

    A fixing hole or a fixing groove fixed to the first fixing rod is formed in the first dust collecting plate,

    An electric dust collector, wherein a fixing hole or a fixing groove fixed to the second fixing rod is formed in the second dust collecting plate.
13. The method of claim 12,

    Each of the first fixing rod and the second fixing rod is formed at least one or more,

    Applying a high voltage to the plurality of first dust collecting plates through a high voltage applying unit connected to any one of the first fixed rods,

    An electric dust collector, characterized in that one of the second fixing rods is grounded to ground the plurality of second dust collecting plates.
14. The method of claim 7,

    Each of the first and second dust collecting plates is formed of a film layer made of a plastic material and a coating layer coated with carbon on the film layer.
15. The method of claim 7,

    Each of the first and second dust collecting plates is formed of a plastic film layer, a first coating layer coated with carbon on the film layer, and a second coating layer coated with plastic on the first coating layer,

    Part of the first coating layer is an electric dust collector, characterized in that exposed to the outside without being coated by the second coating layer.
16. The method of claim 15,

    An electric dust collector, characterized in that the edge of the first coating layer exposed to the outside without being coated by the second coating layer is coated with an insulating material.
17. The method of claim 1,

    The electric dust collector, characterized in that the flow velocity of the gas injected from the high-pressure gas injection unit is 250 m/s or more.
18. An air supply unit that sucks external air from the ground into the basement;

    An electric dust collector for purifying air by receiving contaminated air in an underground space and external air sucked from the air supply unit; And

    Including an exhaust unit for discharging the air in the underground space to the outside,

    The electric dust collector,

    A dust collecting unit for collecting charged fine particles by electrostatic force;

    A high-pressure gas injection unit for injecting a high-pressure gas from one side of the dust collecting unit toward the fine particles collected in the dust collecting unit; And

    And a suction unit configured to suck fine particles separated from the dust collecting unit by the high-pressure gas injection unit at the other side of the dust collecting unit.
19. The method of claim 18,

    An air supply damper formed in the air supply part to control a flow rate of air flowing from the air supply part to the electric precipitator;

    A recycling damper formed in a recycling duct connecting the underground space and the electric precipitator, and controlling a flow rate of air flowing into the electric precipitator from the underground space; And

    An air purification system of a subway station further comprising an exhaust damper formed in the exhaust portion and controlling a flow rate of the air in the underground space discharged to the outside.
20. The method of claim 18,

    The electric dust collecting unit further includes a charging unit for charging the fine particles,

    The charging unit is formed at at least one of a front end of the dust collecting unit inside the electric dust collector, the air supply unit, inside a recycling duct connecting the underground space and the electric dust collector, or an entrance to which the recycling duct is connected to an underground space. Air purification system of a subway station, characterized in that.

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