KR102448562B1 - Dust precipitator collecting dust particles by using an annular discharge region and dust precipitation system having the same - Google Patents

Abstract

A dust collecting device and a dust collecting system including the same are provided that can prevent re-scattering due to particle neutralization to increase dust collection efficiency and increase the cleaning effect of the dust collecting part. The dust collector includes: a tubular dust collector; a spiral charging unit having a discharge member inside the dust collecting unit; a power supply unit causing corona discharge through the discharge member; and a cleaning solution providing section that forms a cleaning solution film on the inner wall of the dust collecting section. An annular discharge area is formed between the charging section and the vertical axis to increase the dust collection efficiency. .

Description

Dust precipitator collecting dust particles by using an annular discharge region and dust precipitation system having the same}

The present invention relates to a dust collector and a dust collecting system including the same, and more particularly, to a dust collecting device for collecting dust particles using an annular discharge area and a dust collecting system including the same.

The electrostatic precipitator is a device that removes or collects solid particles suspended in the air by an electrical method. The electric charge generated by corona discharge becomes charged particles while attached to the particles, and the principle is that they are attracted to the electrode of opposite polarity by electrostatic force. use it Most conventional electric dust collectors adopt a structure in which a plurality of planar (or linear) charging units are arranged side by side, and a plurality of planar dust collecting units are arranged side by side at a rear end thereof. That is, while the contaminated air passes between the plurality of planar charging units, the dust particles are charged by the corona discharge, and they are collected by the electrostatic force while flowing into the dust collecting unit.

In the case of such a conventional dust collector, since the <charged area> and the <dust collection area> are clearly separated based on the air flow direction, when some of the charged particles passing through the <charged area> are neutralized again, the <dust collection area> Even if it is introduced, it re-scatters and is often discharged without being collected.

On the other hand, in order to remove the dust accumulated in the electrification part, a wet dust collector is widely used for washing with water. However, in the case of a conventional electric dust collector, in many cases, a plurality of dust collecting plates are closely arranged to increase dust collection efficiency. However, due to the narrow space between the dust collecting plates, if water is spilled on the dust collecting plate while voltage is applied to the dust collecting plate, a water film peeling phenomenon occurs, and peeling occurs. The dust collection efficiency decreases due to the water film. In order to prevent this, in the case of the conventional wet dust collector, cleaning is often performed only in a state where no voltage is applied to the dust collecting plate. Although the dust collection efficiency can be increased, there is a problem that the cleaning effect is deteriorated because the cleaning is performed intermittently.

An object of the present invention is to provide a dust collector capable of preventing re-scattering due to particle neutralization, thereby increasing dust collection efficiency and enhancing the cleaning effect of the dust collecting unit.

Another object to be solved by the present invention is to provide a dust collecting system including such a dust collecting device.

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

A dust collector according to an embodiment of the present invention for achieving the above object is a dust collector for collecting and charging dust particles in polluted air, comprising: a tubular dust collector for moving the air from one side to the other; a spiral charging unit disposed inside the dust collecting unit spaced apart from the dust collecting unit at a predetermined interval and having a discharge member protruding toward a longitudinal axis of the dust collecting unit; a power supply unit for generating a corona discharge through the discharge member by forming a potential difference between the dust collecting unit and the charging unit; and a cleaning solution providing part disposed on the dust collecting part to form a cleaning liquid film on an inner wall of the dust collecting part. Here, an annular discharge region by the discharge member may be formed between the charging unit and the vertical axis. The dust particles charged by the corona discharge may be collected by the cleaning liquid film while moving toward the dust collecting unit.

A magnetic field may be formed along the circumference of the charging unit, and an electric wind may be generated by canceling the magnetic fields between the charging units vertically adjacent to each other with respect to the vertical axis, and the charged dust particles are transferred to the dust collecting unit by the electric wind. can be accelerated

The charging unit may be formed of a spiral rod.

The charging part may be made of a spiral tube having a hollow formed therein, and a spray nozzle open toward the dust collecting part may be formed on the side of the charging part, and the injection liquid injected into the charging part may be supplied to the dust collecting part through the spray nozzle. It can be sprayed into the inner wall.

The discharge member may be formed of a discharge blade or a plurality of discharge needles arranged at predetermined intervals.

A dust collection system according to an embodiment of the present invention for achieving the above other object includes: a duct for collecting dust particles; the dust collector for collecting dust particles supplied from the duct; a blower for discharging the filtered air from the dust collector to the outside; a wastewater collector for collecting the pollutants collected by the dust collector; and an oil-water separator for separating water and oil from the wastewater collector.

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

As described above, the dust collecting device and the dust collecting system according to the present invention have the following excellent effects.

First, the tubular dust collecting unit and the spiral charging unit disposed therein form an annular discharge region and electric wind, thereby increasing dust collecting efficiency. The <annular discharge region> is formed between the helical charging part and the longitudinal axis of the tubular dust collecting part, and an <electric wind> toward the dust collecting part is formed between the vertically adjacent charging parts. Accordingly, the polluted air continuously passes through the annular discharge region while moving from one side of the dust collecting unit to the other, and the charged dust particles may be accelerated by the electric wind to the dust collecting unit and collected. In particular, since charging and dust collection occur continuously over the entire period until the air introduced into the dust collector is discharged, it is possible to effectively suppress the re-dispersion of the charged particles by being neutralized again.

Second, since the dust collected at all times can be removed through the cleaning liquid film formed on the inner wall of the dust collecting unit while the dust collector is operating (that is, a potential difference is formed between the dust collecting unit and the charging unit), automatic cleaning can be implemented.

Third, it is also possible to pressurize the inner wall of the dust collecting part by high-pressure spraying of the spray liquid through the charging part made of a spiral tube and the spray nozzle formed on the side thereof.

1 is a block diagram showing a dust collection system according to an embodiment of the present invention.
2 is a perspective view illustrating a dust collector according to an embodiment of the present invention.
3 is a cross-sectional view taken along line AA′ of the dust collector of FIG. 2 .
FIG. 4 is an enlarged view of part P of FIG. 3 .
FIG. 5 is a diagram conceptually illustrating an annular discharge region in the dust collector of FIG. 2 .
6 is a cross-sectional view of the dust collector of FIG. 2 taken along line BB'.
7 is a perspective view showing a dust collector according to another embodiment of the present invention.
8 is a cross-sectional view of the dust collector of FIG. 7 .
FIG. 9 is an enlarged view of part Q of FIG. 8 .
FIG. 10 is a cross-sectional view showing the charging unit of FIG. 9 .
11 is a modified example of the discharge member.

Advantages and features of the present invention and methods of achieving them will become apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in a variety of different forms, only these embodiments allow the disclosure of the present invention to be complete, and common knowledge in the technical field to which the present invention belongs It is provided to fully inform the possessor of the scope of the invention, and the present invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout.

1 is a block diagram showing a dust collection system according to an embodiment of the present invention. The dust collecting system of the present invention includes a first duct 98 , a dust collector 100 , a second duct 101 , a wastewater collector 102 , an oil-water separator 103 , and a blower 104 .

The dust collection system of the present invention can be mainly applied to a structure in which smoke or dust is removed or collected from indoor air, such as a restaurant having a roasting table, and then discharged to the outside. Specifically, indoor air (smoke or dust) is collected through the first duct 98 . The dust collector 100 collects smoke or dust contained in the air supplied from the first duct 98 . The air filtered through the dust collector 100 is discharged to the outside through the second duct 101 . Here, a separate blower may be provided to discharge the filtered air to the outside, or a structure in which air is naturally discharged to the outside using a chimney effect caused by a difference in internal and external temperature and air pressure may be employed. The sewage collector 102 collects the contaminants collected by the dust collector 100, the oil-water separator 103 separates the contaminants collected in the sewage collector 102 into water and oil, and the oil is the oil collector stored in the shed, and the water is discharged as domestic sewage.

Hereinafter, a dust collector according to an embodiment of the present invention will be described in detail with reference to FIGS. 2 to 6 . 2 is a perspective view illustrating a dust collector according to an embodiment of the present invention. 3 is a cross-sectional view taken along line AA′ of the dust collector of FIG. 2 . FIG. 4 is an enlarged view of part P of FIG. 3 . FIG. 5 is a diagram conceptually illustrating an annular discharge region in the dust collector of FIG. 2 . 6 is a cross-sectional view of the dust collector of FIG. 2 taken along line BB'.

First, referring to FIGS. 2 and 3, the dust collector 100 of the present invention is a device for collecting and charging dust particles in polluted air, and includes a dust collecting unit 10, a charging unit 30, a power supply unit (not shown) and and a cleaning solution providing unit 20 .

The dust collector 10 has a tubular shape in which air moves from one side to the other. For example, air introduced from the upper side of the dust collecting unit 10 may be discharged to the lower side of the dust collecting unit 10 through a process of collecting dust particles. The dust collecting unit 10 may be formed of a conductor to attract charged particles by electrostatic force. In the present embodiment, a tubular dust collector having a circular cross section is described as an example, but the present invention is not limited thereto, and a tubular dust collector having various cross sections may be applied. For example, the cross section of the tubular dust collector may be polygonal, oval, or the like.

The charging unit 30 is spaced apart from the dust collecting unit 10 at a predetermined interval inside the dust collecting unit 10 and has a spiral structure as a whole. In this embodiment, the charging unit 30 made of a rod shape has been described as an example, but the present invention is not limited thereto. The charging unit 30 includes a discharge member 32 protruding toward a longitudinal axis or a central axis of the dust collecting unit 10 . The discharge member 32 may be formed in a shape with a pointed end in order to cause corona discharge in the gas. In this embodiment, a plurality of discharge needles arranged at predetermined intervals are described as an example of the discharge member 32, but the present invention is not limited thereto and may be formed in any shape capable of causing corona discharge. The charging unit 30 or the discharging member 32 may be made of a non-corrosive conductive material, for example, stainless steel, tungsten, aluminum, or an alloy thereof. Since the charging unit 30 is spaced apart from the dust collecting unit 10 by a predetermined interval, as the cross-sectional shape of the dust collecting unit 10 is changed in various ways, the charging unit 30 also has a substantially identical cross-section (eg, for example, circular, polygonal, oval, etc.). For example, referring to FIG. 3 , as the dust collecting unit 10 has a circular cross-section, the charging unit 30 also has a circular cross-section.

A power supply unit (not shown) forms a potential difference between the dust collecting unit 10 and the charging unit 30 to cause corona discharge through the discharge member 32 . In the present embodiment, the case where the dust collecting unit 10 is grounded and the voltage V is applied to the charging unit 30 is described as an example, but the present invention is not limited thereto. Each electrode may have any polarity as long as it is maintained between and the charging unit 30 .

The cleaning liquid providing unit 20 is disposed on the dust collecting unit 10 to supply the cleaning liquid to the inner wall of the dust collecting unit 10 to form the cleaning liquid film 22 . For example, the cleaning solution providing unit 20 may be formed of an annular tube disposed along the inner periphery of the dust collecting unit 10 , and a plurality of openings are formed on the outer side of the annular tube, through which the cleaning solution is provided on the inner wall of the dust collecting unit 10 . can be supplied.

An annular discharge area by the dust collector of the present invention will be described with reference to FIGS. 4 and 5 .

When the power supply unit forms a potential difference between the dust collecting unit 10 and the charging unit 30 , a corona discharge region 50 is formed around the discharge member 32 sharply protruding from the charging unit 30 . The dust particles 40 in the air introduced into the dust collector 100 are charged while passing through the corona discharge region 50 and then move to the dust collecting unit 10 by electrostatic force. At this time, the cleaning liquid film 22 is always formed on the inner wall of the dust collecting unit 10 by the cleaning liquid providing unit 20 , and the cleaning liquid film 22 acts as the same electrode together with the dust collecting unit 10 . Accordingly, the charged dust particles 40 are collected in the cleaning liquid film 22 while moving toward the dust collecting unit 10, and the cleaning liquid film 22 moves from the upper to the lower portion of the dust collecting unit 10 by gravity. 40) together with the sewage collector 102.

On the other hand, since the discharge member 32 forming the corona discharge region 50 protrudes from the spiral charging unit 30 toward the longitudinal axis or the central axis of the dust collecting unit 10, as shown in FIG. 5, the charging unit 30 and An annular discharge region 51 by the discharge member 32 is formed between the vertical axes of the dust collecting unit 10 . Since the air introduced into the dust collector 100 continuously passes through the annular discharge region 51 until it exits the dust collector 100, the charged dust particles 40 are neutralized in the process of moving to the dust collector 10. Even if it occurs, since it can be charged again by the annular discharge region 51, the dust collection efficiency can be increased.

With reference to FIG. 6, the electric wind by the dust collector of this invention is demonstrated.

In general, a magnetic field is formed around a conductor through which electricity flows. Similarly, a magnetic field 52 is formed in a predetermined direction along the circumference of the charging unit 30 . Since the charging unit 30 has a spiral structure, the magnetic field 52 is canceled between the charging units 30 vertically adjacent to each other with respect to the vertical axis of the dust collecting unit 10 to generate an electric wind. Electric wind refers to a wind that occurs when the nearby air is rejected and other air is pushed in when corona discharge occurs, and it can be amplified by the interference phenomenon of electromagnetic waves. The electric wind accelerates the charged dust particles 40 to the dust collecting unit 10 to increase dust collecting efficiency.

Hereinafter, a dust collector according to another embodiment of the present invention will be described in detail with reference to FIGS. 7 to 10 . 7 is a perspective view showing a dust collector according to another embodiment of the present invention. 8 is a cross-sectional view of the dust collector of FIG. 7 . FIG. 9 is an enlarged view of part Q of FIG. 8 . FIG. 10 is a cross-sectional view showing the charging unit of FIG. 9 . For convenience of explanation, members having the same function as each member shown in the drawings ( FIGS. 2 to 6 ) of the previous embodiment are denoted by the same reference numerals, and descriptions thereof will be omitted, and differences will be mainly described below.

The charging unit 130 of the dust collector 200 of this embodiment is made of a spiral tube having a hollow inside. On the side of the charging unit 130 (ie, opposite to the discharge member 32 ), a spray nozzle 134 opened toward the dust collecting unit 10 is formed. Accordingly, when the injection liquid is injected into the charging unit 130 , it may be injected to the inner wall of the dust collecting unit 10 through the injection nozzle 134 . An automatic control valve, an automatic controller, etc. may be additionally provided for nozzle injection of the injection liquid.

The dust collector 200 of the present invention can minimize contamination of the device itself through two-step cleaning of automatic cleaning and pressure cleaning. In the <automatic cleaning step>, while the dust collecting device 200 performs the dust collecting operation (that is, while a potential difference is formed between the dust collecting unit 10 and the charging unit 130 ), the cleaning solution providing unit 20 operates the dust collecting unit 10 . By forming the cleaning liquid film 22 on the inner wall, regular cleaning is performed on the collected contaminants. <Pressure cleaning step> is a method for reducing equipment contamination when there is a problem in the formation of the cleaning liquid film or when the dust collector 200 is not powered on and the dust collection operation is not performed. The spray liquid is injected, and the particulate oil or dust not removed by the cleaning liquid film 22 is washed by pressure spraying through the spray nozzle 134 .

Although not shown, in order to increase the cleaning effect during pressure cleaning, a conical spray nozzle may be additionally provided at the uppermost center of the charging unit 130 and used to clean the entire inside of the dust collecting unit 10 .

In the above embodiments, a plurality of discharge needles arranged at predetermined intervals as the discharge member 32 have been described as an example, but the present invention is not limited thereto and may be formed in any shape capable of generating corona discharge. For example, FIG. 11 shows a modified example of the discharge member, and the discharge member 132 may be formed of a discharge blade having a pointed end.

In addition, the combination of the discharging member and the spiral charging unit may be changed into various shapes. For example, it may be composed of a blade-type spiral charging unit and a plurality of needles (discharge members) formed on one side thereof. It may be composed of a blade-type spiral charging unit and a plurality of needles (discharge members) formed on both sides thereof.

It may be composed of a rod (or tube) type spiral charging unit and a plurality of needles (discharging members) formed on its outer surface in various directions, and if the protruding lengths of the plurality of needles (discharging members) are the same, the circumference of the charging unit A concentric discharge region may be formed in the , and an eccentric discharge region may be formed when the protruding lengths are different from each other.

It may be composed of a rod (or tube) type spiral charging part and a plurality of blades (discharge member) formed to be inclined along the longitudinal direction or in the longitudinal direction on the outer surface thereof, and if the protruding length of the plurality of blades (discharge member) is Concentric discharge regions may be formed around the charging unit when they are identical to each other, and eccentric discharge regions can be formed when the protruding lengths are different from each other.

Although the embodiments of the present invention have been described with reference to the accompanying drawings, those of ordinary skill in the art to which the present invention pertains can realize that the present invention can be embodied in other specific forms without changing its technical spirit or essential features. you will be able to understand Therefore, it should be understood that the embodiments described above are illustrative in all respects and not restrictive.

10: dust collector
20: cleaning solution providing unit
22: cleaning liquid film
30, 130: Daejeon
32, 132: discharge member
40: dust particles
50: corona discharge area
51: annular discharge area
52: magnetic field
98, 101: duct
100, 200: dust collector
102: sewage collector
103: oil-water separator
134: spray nozzle

Claims (6)

As a dust collector for collecting dust particles in polluted air by charging,
a tubular dust collecting unit in which the air moves from one side to the other;
a spiral charging unit disposed inside the dust collecting unit spaced apart from the dust collecting unit at a predetermined interval and having a discharge member protruding toward a longitudinal axis of the dust collecting unit;
a power supply unit for generating a corona discharge through the discharge member by forming a potential difference between the dust collecting unit and the charging unit; and
and a cleaning solution providing part disposed on the dust collecting part and forming a cleaning liquid film on the inner wall of the dust collecting part,
An annular discharge region is formed by the discharge member between the charging unit and the vertical axis,
The dust particles charged by the corona discharge are collected by the cleaning liquid film while moving toward the dust collecting unit,
The discharge member protrudes from the charging unit, but protrudes in a direction away from the dust collecting unit. According to claim 1,
A magnetic field is formed along the periphery of the charging unit, and the magnetic field is canceled between the charging units vertically adjacent to each other with respect to the vertical axis to generate an electric wind, and the charged dust particles are accelerated to the dust collecting unit by the electric wind. dust collector with According to claim 1,
The charging unit is a dust collector, characterized in that made of a spiral rod. According to claim 1,
The charging part is made of a spiral tube having a hollow inside, and a spray nozzle open toward the dust collecting part is formed on the side of the charging part, and the injection liquid injected into the charging part is sprayed to the inner wall of the dust collecting part through the spray nozzle A dust collector, characterized in that it becomes. According to claim 1,
The discharge member comprises a discharge blade or a plurality of discharge needles arranged at predetermined intervals. ducts for collecting dust particles;
The dust collector of claim 1 for collecting dust particles supplied from the duct;
a blower for discharging the filtered air from the dust collector to the outside;
a wastewater collector for collecting the pollutants collected by the dust collector; and
and an oil-water separator for separating water and oil from the wastewater collector.

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