KR102490514B1 - Dust precipitator for subway supply and exhaust pipe using running wind - Google Patents

Abstract

Installed in subway supply and exhaust outlets, a dust collector for subway supply and exhaust outlets is provided that can increase dust collection efficiency and conveniently clean collected dust particles by preventing re-dispersion due to particle neutralization. This dust collector has a honeycomb structure by combining a plurality of hexagonal tube-shaped dust collecting units, and each dust collecting unit includes a hexagonal tube-shaped dust collecting unit; a charging unit of a squirrel cage structure disposed inside the dust collecting unit; and a power supply unit generating corona discharge through a plurality of discharging members constituting the charging unit.

Description

Dust precipitator for subway supply and exhaust pipe using running wind}

The present invention relates to a dust collector for collecting dust particles, and more particularly, to a dust collector for a subway supply/exhaust outlet capable of collecting dust particles in a subway tunnel by using the running wind of the subway.

In general, the subway transports passengers and cargo by opening railroads and stations underground. Due to its many advantages such as speed, accuracy, safety, mass transportation, comfort, low pollution, and low cost, it is a public transportation method in downtown areas. It plays a pivotal role, and due to these advantages, the opening section is gradually expanding.

Despite these advantages, dust particles, noise, and vibration are inevitably generated according to the operation of the subway, adversely affecting the health of citizens using the subway. Particularly, dust particles are generally caused by abrasion caused by friction between rails and subway wheels in tunnel sections where trains are moving at high speed. do. Various methods have been tried to remove these dust particles. For example, there is a method of removing fine dust by installing an electric precipitator between a tunnel vent and an external supply/exhaust vent.

Here, the electrostatic precipitator is a device that removes or collects solid particles suspended in the air by an electrical method. The principle is that charges generated by corona discharge become charged particles as they are attached to particles, and are attracted to electrodes of opposite polarity by electrostatic force. Use Most conventional electric dust collectors adopt a structure in which a plurality of planar charging units are arranged side by side, and a plurality of planar dust collection units are arranged side by side at the rear end. That is, while the contaminated air passes between the plurality of planar charging units, dust particles are charged by corona discharge, and are collected by electrostatic force as they flow into the planar dust collection unit.

In the case of such a conventional dust collector, since the <charged area> and the <dust collecting area> are clearly divided based on the air flow direction, when some of the charged particles that have passed through the <charged area> are neutralized again, they are returned to the <dust collecting area>. Even if it enters, it is re-dispersed, and in many cases it is discharged as it is without being captured.

The problem to be solved by the present invention is to provide a dust collector for subway supply and exhaust outlets installed in subway supply and exhaust outlets and preventing re-dispersion due to particle neutralization to increase dust collection efficiency and conveniently cleaning collected dust particles. .

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

A dust collector for subway supply and exhaust outlets according to an embodiment of the present invention for achieving the above object is a dust collector for subway supply and exhaust outlets having a honeycomb structure in which a plurality of hexagonal dust collection units are coupled. A hexagonal pipe-shaped dust collector forming an air flow path along a longitudinal axis from one end to the other end; a charging unit having a plurality of discharge members extending along the longitudinal axis of the dust collecting unit inside the dust collecting unit; and a power supply unit generating a corona discharge through the discharging member by forming a potential difference between the dust collecting unit and the charging unit. Here, dust particles included in the air flowing along the air passage formed along the longitudinal axis of the dust collector are charged by the corona discharge and move toward the dust collector.

The charging unit may have a squirrel cage structure, and the charging unit may include a pair of fixing rings disposed on both sides of the dust collecting unit and a plurality of discharge members connecting the pair of fixing rings.

The plurality of discharge members may be arranged spaced apart from the dust collecting part at regular intervals, and the plurality of discharge members may be arranged concentrically with respect to a longitudinal axis of the dust collecting part.

a support in the form of a matrix disposed above the plurality of dust collecting units; And it may further include a spray nozzle protruding toward each dust collecting unit from the support.

The charging unit includes a pair of fixing rings disposed on both sides of the dust collecting unit; a plurality of discharge members connecting the pair of fixing rings; and a shaft member coupled to the pair of fixing rings and passing through a longitudinal axis of the dust collecting unit. Here, the hanger coupling the charging unit to the support includes an upper coupling unit coupled to the injection nozzle; a lower coupling portion coupled to the shaft member; And it may include a connecting member connecting the upper coupling portion and the lower coupling portion.

Each discharge member is spaced apart from each other at regular intervals, and each discharge member may be positioned on a plane formed by a longitudinal axis of the dust collector and a corner of the dust collector.

The dust collecting units may be coupled in parallel with each other.

The discharge member may be made of a wire.

The dust collecting device may collect the dust particles by using the running wind of the subway without a separate blowing device.

The dust collecting device may be installed in a supply/exhaust outlet vertically lowered from the ground, and a longitudinal axis of the dust collecting pipe may be perpendicular to the ground.

Details of other embodiments are included in the specification and drawings.

As described above, the dust collector according to the present invention has the following excellent effects.

First, since the dust collector of the present invention has a honeycomb structure as a whole by combining a plurality of hexagonal dust collection units in parallel, it can be structurally safely installed in the subway supply and exhaust system, and furthermore, it can be installed in the supply and exhaust system by adjusting the number of dust collection units. can flexibly respond to changes in the size of

Second, dust collection efficiency can be increased by forming an annular discharge area and electric wind in a hexagonal tube-shaped dust collector and a squirrel-cage structure charged part disposed therein. An <annular discharge region> is formed around a plurality of discharge members arranged concentrically at predetermined intervals inside the dust collector, and <electric wind> is formed between adjacent discharge members toward the dust collector. Therefore, while the contaminated air moves from one side of the dust collecting unit to the other side, it continuously passes through the annular discharge area, and during this time, charged dust particles are accelerated to the dust collecting unit by electric wind and collected. In particular, since charging and dust collection continuously occur throughout the entire period until the air introduced into the dust collector is discharged, it is possible to effectively suppress the re-dispersion of charged particles by being neutralized again.

Third, it is possible to effectively remove contaminants accumulated on the inner wall of the dust collecting unit by individually providing spray nozzles for each dust collecting unit and arranging a sewage collector under the dust collecting device. In addition, in a state in which the power supply to the collecting unit is cut off, cleaning liquid is sprayed through the spray nozzle to clean the inner wall of the dust collecting unit, and then air is sprayed through the spray nozzle to dry the inside of the dust collecting unit, and then power is applied to the dust collecting unit again. Therefore, it is possible to prevent risk factors such as electrical short circuit in the dust collector due to the cleaning operation in advance.

Fourth, in the case of a general electric dust collector, dust collection efficiency is increased by using a straight flow in which air flows parallel to the dust collector plate. On the other hand, the electric dust collector of the present invention can increase the dust collection efficiency by increasing the residence time in the dust collector by vortexing the air due to the structural peculiarity of the cage-type charging unit and the hexagonal tube-shaped dust collecting unit. That is, dust particles can be effectively collected by using the centrifugal force of the vortex and the electric field between the charging unit and the dust collection unit.

1 and 2 are side views conceptually illustrating a relationship between a supply and exhaust outlet in which a dust collector according to an embodiment of the present invention is installed and a subway tunnel.
3 is an exploded perspective view showing a dust collector according to an embodiment of the present invention.
4 is an exploded perspective view of the dust collecting unit of FIG. 3 .
FIG. 5 is a plan view of the dust collecting unit of FIG. 3 .
6 is a cross-sectional view of the dust collecting unit of FIG. 3 .
7 is a cross-sectional view showing a dust collecting operation of the dust collecting unit of FIG. 3 .

Advantages and features of the present invention, and methods of achieving them, will become clear with reference to the detailed description of the following embodiments taken in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in various different forms, only these embodiments make the disclosure of the present invention complete, and common knowledge in the art to which the present invention belongs. It is provided to fully inform the holder of the scope of the invention, and the present invention is only defined by the scope of the claims. Like reference numbers designate like elements throughout the specification.

The discharge member of the present invention is made of a conductive material that causes corona discharge to the surroundings due to a potential difference with the dust collecting unit, and may have a shape of, for example, a wire, string, strap, or strap. Hereinafter, in the embodiments of the present invention, a wire-shaped discharge member, that is, a discharge wire is described as an example for convenience of explanation, but the scope of the present invention is not limited thereby.

1 and 2 are side views conceptually illustrating a relationship between a supply and exhaust outlet in which a dust collector according to an embodiment of the present invention is installed and a subway tunnel. FIG. 1 represents a phenomenon in which air in a tunnel is exhausted to the ground through a supply/exhaust port by subway running wind, and FIG. 2 represents a phenomenon in which outside air is supplied into the tunnel by subway running wind.

The dust collector 30 is disposed in the supply/exhaust outlet 10 vertically lowered from the ground, and the tunnel vent 12 formed in the subway tunnel 22 is connected to the outside through the supply/exhaust outlet 10. As shown in FIG. 1 , driving wind generated while the subway 20 approaches the tunnel vent 12 passes through the tunnel vent 12 and the dust collector 30 and is discharged to the outside through the supply/exhaust vent 10 . Therefore, even if there is no blowing equipment, the air 24 containing dust particles in the tunnel is purified while passing through the dust collector 30 by the running wind of the subway and then discharged to the ground. Conversely, as shown in FIG. 2, when the subway 20 moves away from the tunnel vent 12, the external air 26 is blown through the supply/exhaust vent 10 and the dust collector 30 without a separate blowing device by the running wind generated at this time. ) and then introduced into the tunnel 22 through the tunnel vent 12.

Hereinafter, a dust collector according to an embodiment of the present invention will be described in detail with reference to FIGS. 3 to 7 . 3 is an exploded perspective view showing a dust collector according to an embodiment of the present invention. 4 is an exploded perspective view of the dust collecting unit of FIG. 3 . FIG. 5 is a plan view of the dust collecting unit of FIG. 3 . 6 is a cross-sectional view of the dust collecting unit of FIG. 3 . 7 is a cross-sectional view showing a dust collecting operation of the dust collecting unit of FIG. 3 .

First, referring to FIG. 3, the dust collecting device 30 includes a dust collecting block having a honeycomb structure in which a plurality of hexagonal pipe-shaped dust collecting units 100 are coupled in parallel, and a support in the form of a matrix disposed on the dust collecting block ( 40) and a spray nozzle 130 protruding from the support 40 toward each dust collecting unit 100. The dust collecting unit 100, in particular, the charging unit 120 is suspended by the hanger 50 in a coupled state by the injection nozzle 130.

Referring to FIGS. 4 and 5 , the dust collecting unit 100 is a device for charging and collecting dust particles in the polluted air, and includes a dust collecting unit 110, a charging unit 120, and a power supply unit V.

The dust collector 110 has a hexagonal tube shape through which air moves from one side to the other. That is, an air flow path is formed along the longitudinal axis from one end to the other end inside the dust collector 110 . For example, the air 24 containing dust particles in the tunnel 22 may be introduced to the lower side of the dust collecting unit 110 and discharged to the upper side of the dust collecting unit 110 through a process of collecting dust particles. Conversely, outside air 25 on the ground may be introduced into the upper side of the dust collecting unit 110 and discharged to the lower side of the dust collecting unit 110 through a process of collecting dust particles. The dust collector 110 may be made of a conductive material to attract charged particles by electrostatic force.

The dust collecting unit 110 may electrically maintain a grounded state. Optionally, the dust collection unit 110 may maintain an electrically floating state. Furthermore, in order to prevent electrical safety accidents, an insulating plate, an insulating film, or the like may be disposed on the outer surface of the dust collector 110 .

The charging unit 120 is spaced apart from the dust collecting unit 110 at a predetermined interval inside the dust collecting unit 110 and has a squirrel cage structure as a whole. Specifically, the charging unit 120 includes a pair of fixing rings 124 and 125 disposed on both sides of the dust collecting unit 110 and a plurality of discharge members 122 connecting the pair of fixing rings 124 and 125. and a shaft member 126 coupled to a pair of fixing rings 124 and 125 and passing through the longitudinal axis of the dust collector 110.

Each discharge member 122 extends along a longitudinal axis or a central axis of the dust collector 110 . In order to improve dust collection efficiency through uniform corona discharge, the plurality of discharge members 122 are spaced apart from the dust collector 110 at regular intervals, and may be arranged concentrically with respect to the longitudinal axis of the dust collector 110. . In addition, each discharge member 122 may be spaced apart from each other at regular intervals. Preferably, when each discharge member 122 is located on a longitudinal axis of the dust collector 110 or on a plane formed by the axial member 126 and the corner Q of the dust collector 110, a more uniform corona within the dust collector 110 may cause discharge. The discharge member 122 may be made of a thin metal material or wire to cause corona discharge in gas.

The fixing rings 124 and 125 may be made of a conductive material to transfer power from the power supply unit V to the discharge member 122 . Just as the discharge member 122 maintains a constant distance from the dust collector 110, it is preferable that the fixing rings 124 and 125 also maintain a constant distance from the dust collector 110 for uniform corona discharge. Accordingly, the fixing rings 124 and 125 may have a hexagonal shape similar to the cross-sectional shape of the dust collecting unit 110 . However, the present invention is not limited thereto, and the fixing rings 124 and 125 have any structure (for example, a circular shape) in which the discharge member 122 can be disposed concentrically with respect to the longitudinal axis of the dust collector 110. can have

The shaft member 126 may be made of a conductive material and serves to maintain the shape of the entire charging unit 120 by being combined with the fixing rings 124 and 125 . In addition, the shaft member 126 is coupled to the injection nozzle 130 or the support 40 through the hanger 50, and the charging unit 120 is physically separated from the dust collecting unit 110 by this coupling structure It can be fixed to the support (40). In addition, when the support 40 and the hanger 50 are made of a conductive material, power can be applied to the charging units 120 of all the dust collecting units 100 at once by applying power to the support 40 . In this case, the support 40 may physically support the charging unit 120 of all the dust collecting units 100 and act as a power transmission means at the same time.

Although not shown, support members for supporting the hexagonal shape of the dust collecting part 110 may be added to the upper and lower ends of the dust collecting part 110 . In addition, in order to maintain an electrical insulation state between the charging unit 120 and the dust collecting unit 110 , an insulating spacer may be added in a form surrounding the charging unit 120 .

The power supply unit V generates a potential difference between the dust collecting unit 110 and the charging unit 120 to cause corona discharge through the discharging member 122 . In this embodiment, a case in which the dust collecting unit 110 is grounded and voltage is applied to the charging unit 120 is described as an example, but the present invention is not limited thereto, and a potential difference that can cause corona discharge is generated between the dust collecting unit 110 and the charging unit. 120, each electrode can have any polarity. Furthermore, even when the dust collecting unit 110 is in an electrically floating state, the power supply unit V may apply a voltage to the charging unit 120 to form a potential difference between the dust collecting unit 110 and the charging unit 120 .

The hanger 50 couples the charging unit 120 to the support 40 . The hanger 50 connects the upper coupling part 52 coupled to the support 40 or the spray nozzle 130, the lower coupling part 54 coupled to the shaft member 126 of the charging unit 120, and these It includes a connecting member 56 to. The injection nozzle 130 coupled to the center of the upper coupling part 52 is positioned above the shaft member 126 to uniformly clean the dust collecting part 110 as a whole.

A cleaning liquid supply unit 134 and an air supply unit 136 are connected to the injection nozzle 130 . The cleaning liquid or air may be selectively sprayed through the spray nozzle 130 under user control.

Referring to Figs. 6 and 7, the annular discharge region and the electric wind by the dust collector of the present invention will be described.

When the power supply unit V forms a potential difference between the dust collecting unit 110 and the charging unit 120, a corona discharge region is formed around the discharge member 122 made of a thin wire in the charging unit 120. An air flow path is formed along the longitudinal axis of the dust collecting unit 110, and the dust particles 140 included in the air 24 and 26 flowing along the air flow path are charged while passing through the corona discharge area, and then the dust collecting unit 110 by electrostatic force. will move towards These dust particles 140 are gathered to form dust contaminants 132 on the inner wall of the dust collector 110 . After performing the dust collection operation for a predetermined period of time, the power supply to the dust collection unit 110 is cut off, and then the cleaning solution is sprayed through the injection nozzle 130 to wash the dust contaminants 132 downward along the inner wall of the dust collection unit 110. Afterwards, the water is collected and purified at a sewage treatment plant. When the cleaning operation is completed, air is sprayed through the injection nozzle 130 to completely dry the inside of the dust collection unit 100, and then the dust collection operation is performed again.

Meanwhile, corona discharge occurs around the discharge member 122 and the discharge member 122 has a cage-like structure, that is, since it is concentrically arranged with respect to the longitudinal axis of the dust collector 110, the discharge member 122 ), an annular discharge region is formed. Therefore, since the air 24 and 26 introduced into the dust collector 30 continuously passes through the annular discharge area until it leaves the dust collector 30, the process of moving the charged dust particles 140 to the dust collector 110 Even if neutralization occurs, the dust collection efficiency can be increased because it can be charged again by the annular discharge area.

In general, an electromagnetic field is formed around a conductor through which electricity flows. Likewise, an electromagnetic field 142 is formed in a predetermined direction along the circumference of the discharge member 122 . Since the discharge members 122 are arranged at regular intervals on concentric circles within the dust collection unit 110, the electromagnetic fields 142 cancel each other between the discharge members 122 adjacent to each other, so that electric wind is generated. Electric wind refers to the wind that occurs when nearby air is rejected and other air is pushed in repeatedly when corona discharge occurs, and it can be amplified by interference of electromagnetic waves. This electric wind serves to increase the dust collection efficiency by accelerating the charged dust particles 140 toward the dust collector 110 in a direction perpendicular to the longitudinal axis of the dust collector 110 .

Although the embodiments of the present invention have been described with reference to the accompanying drawings, those skilled in the art can realize that the present invention can be implemented in other specific forms without changing the technical spirit or essential features. you will be able to understand Therefore, the embodiments described above should be understood as illustrative in all respects and not limiting.

10: Supply and exhaust ports
12: tunnel vent
20: Subway
22: Tunnel
24, 26: air
30: dust collector
40: support
50: hanger
52: upper joint
54: lower joint
56: connecting member
100: dust collection unit
110: dust collecting unit
120: charging part
122: discharge member
124, 125: fixed ring
126: shaft member
130: injection nozzle
132 dust contaminants
134: cleaning solution supply unit
136: air supply unit
140: dust particles
142 electromagnetic field

Claims (5)

A dust collector for subway supply and exhaust outlets having a honeycomb structure in which a plurality of hexagonal tube-shaped dust collection units are combined,
The dust collection unit,
A hexagonal pipe-shaped dust collector forming an air flow path along a longitudinal axis from one end to the other end;
a charging unit having a plurality of discharge members extending along the longitudinal axis of the dust collecting unit inside the dust collecting unit; and
A power supply unit generating a corona discharge through the discharge member by forming a potential difference between the dust collecting unit and the charging unit;
Dust particles included in the air flowing along the air passage formed along the longitudinal axis of the dust collector are charged by the corona discharge and move toward the dust collector,
The charging unit has a squirrel cage structure, and the charging unit includes a pair of fixing rings disposed on both sides of the dust collecting unit; and six discharge members connecting the pair of fixing rings;
Each fixing ring is made of a conductive material to transfer power from the power source to the discharge member, and each fixing ring forms an air flow path along the longitudinal axis and has an open interior to maintain a constant distance from the dust collector. It is made in the shape of a ring,
Each discharge member is connected to the bent portion of each fixing ring, and each discharge member is located on a plane formed by a longitudinal axis of the dust collector and an edge (Q) of the dust collector. delete According to claim 1,
The plurality of discharge members are arranged spaced apart from the dust collection unit at regular intervals, and the plurality of discharge members are disposed concentrically with respect to the longitudinal axis of the dust collection unit. According to claim 1,
a support in the form of a matrix disposed above the plurality of dust collecting units; and a spray nozzle protruding from the support toward each dust collecting unit. According to claim 4,
The charging unit includes a pair of fixing rings disposed on both sides of the dust collecting unit; a plurality of discharge members connecting the pair of fixing rings; And a shaft member coupled to the pair of fixing rings and passing through the longitudinal axis of the dust collecting unit,
The hanger coupling the charging unit to the support includes an upper coupling unit coupled to the injection nozzle; a lower coupling portion coupled to the shaft member; and a connecting member connecting the upper coupling portion and the lower coupling portion.

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