KR102558592B1 - Electric precipitation - Google Patents

Abstract

The present invention relates to an electric precipitator, wherein a first plate to which a high voltage is applied and a second plate to which a voltage of opposite polarity to the high voltage is applied or grounded are spaced apart from each other so as to be repeated, and in which charged particles are collected by the force of an electric field applied between the first plate and the second plate, either of the first plate or the second plate protrudes in a direction orthogonal to one edge of a direction in which air is introduced. It is characterized by the formation of an inertial collision plate.

Description

Electrostatic precipitator {ELECTRIC PRECIPITATION}

The present invention relates to an electric precipitator, and more particularly, to an electrostatic precipitator that collects charged particles by moving them with the force of an electric field generated by a potential difference between two plates being charged.

An electrostatic precipitator is a device that charges particles such as dust and viruses contained in the air and collects the charged particles on a dust collection plate by electrostatic force to purify the air.

In general, the dust collection plate is composed of a first plate to which a high voltage is applied and a second plate to which a polarity opposite to that of the high voltage is applied or grounded and spaced apart from the first plate. At this time, a plurality of first plates and a plurality of second plates may be alternately spaced apart to reduce a dust collection distance and increase a dust collection area to increase dust collection efficiency.

In the prior art, it is common for a dust collection plate to be made of a metal plate. In the case of a metal plate such as SUS, there is a problem in that it can be easily corroded when used in air containing corrosive gas, such as semiconductor equipment. In addition, when the size (area) of the dust collecting plate increases, it is difficult to manufacture a thin metal plate and the weight becomes heavy.

Recently, a conductive non-metallic plate using CFRP (Carbon Fiber Reinforced Plastic) has been applied to a corrosive environment, but when the size is larger than 1 m, it must be made with a thickness of at least 5 mm or more to maintain flatness.

Accordingly, recently, a film-type dust collecting plate manufactured by coating a conductive material such as carbon on a base film has been used. In this case, since it is strong in corrosion resistance, light in weight, and can be mass-produced at a low manufacturing cost, it is possible to solve the problems of the aforementioned metal plate-type dust collector plate and CFRP-type dust collector plate.

However, in the case of a film-type dust collecting plate, it is common that the dust collecting plate has a width of about 10 cm, and thus it is applied only to small household air purifiers. This is because when the width of the dust collecting plate is greater than 10 cm, the film type dust collecting plate is easily bent or bent by heat during the process of coating and drying the carbon, so that the flatness is rapidly reduced. Therefore, when the size of the film-type dust collecting plates increases, it becomes difficult to arrange the dust collecting plates at equal intervals.

In order to solve this problem, a method of inserting a plurality of separate distance maintaining supports for maintaining the distance between the film-type dust collecting plates is known. In this case, when the distance maintaining supports are exposed to moisture, the potential difference between the dust collecting plates is offset. A problem occurred. Due to these characteristics, the film-type dust collecting plate can be used only in a dry environment for indoor use even when used in a small size or a large size.

In addition, particles of various sizes are distributed in the air, and if dust of all particle sizes is collected at once by an electric precipitator, the electrode is easily contaminated and the durability of the electrode is rapidly reduced due to the generation of sparks.

Republic of Korea Patent No. 10-1610024

Accordingly, an object of the present invention is to solve such a conventional problem, and by forming an inertial collision plate orthogonal to the width direction of the dust collecting plate at the air inlet end of the dust collecting plate to pre-process large particles by collision, It is to provide an electric precipitator capable of improving the efficiency and durability of the dust collecting plate.

In addition, it is to provide a large-sized electric dust collector using a film-type dust collecting plate that is not easily bent or bent even when manufactured in a large size by forming a fixed frame of a rigid material at the edge of the film-type film portion on which an electrically conductive layer is formed.

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.

According to the present invention, a first plate to which a high voltage is applied and a second plate to which a voltage of opposite polarity to the high voltage is applied or grounded are spaced apart from each other so as to be repeated, and in an electric precipitator for collecting charged particles by the force of an electric field applied between the first plate and the second plate, in which one of the first plate or the second plate has an inertial collision plate protruding in a direction orthogonal to one edge of an air flow direction. It can be achieved by ingenuity.

Here, the inertial collision plate may protrude from one edge to both sides.

Here, the inertial collision plate is formed on the second plate, and the distance between the inertial collision plate and the first plate is preferably greater than the distance between the neighboring first plate and the second plate.

Here, a slit may be formed in the inertial collision plate.

Here, the first plate or the second plate may include a film portion in the form of a film including an electrically conductive conductive layer; And it may include a fixed frame made of a rigid material bonded along the edge of the film unit.

Here, the film unit base film; and a conductive layer formed of a carbon coating on the base film.

Here, the film part may further include a coating layer of an insulating material formed on the conductive layer.

Here, the fixing frame is formed of a conductive material, and the fixing frame and the conductive layer may be in contact with each other to conduct electricity through the fixing frame.

Here, the inertial collision plate may be formed on the fixed frame.

According to the electric precipitator of the present invention as described above, it is possible to increase the dust collection efficiency by minimizing the inflow of relatively large particles before the particles flow between the dust collecting plates by the inertial discharge plate, and to prevent the decrease in durability due to sparks. There is an advantage.

In addition, there is an advantage in that even if the dust collecting plate is manufactured in a large film type, it is not easily bent or bent, so that a large electrostatic precipitator that can be used in a humid environment can be provided using a film type dust collecting plate.

1 is a perspective view illustrating a dust collection unit of an electric precipitator according to an embodiment of the present invention.
FIG. 2 is a plan view of FIG. 1 .
3 is a perspective view illustrating a dust collecting unit according to another embodiment of the present invention.
4 is a cross-sectional view of a dust collecting plate according to an embodiment of the present invention.
5 is a modified example of FIG. 4 .
6 shows a manufacturing process of a dust collecting plate according to an embodiment of the present invention.
7 is a perspective view of a second plate according to the process of FIG. 6;
8 is a perspective view of the first plate according to the process of FIG. 6;
9 is a perspective view illustrating a dust collecting unit using the dust collecting plates of FIGS. 7 and 8;

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

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 may be implemented in various different forms, and only these embodiments are provided to complete the disclosure of the present invention and to fully inform those skilled in the art of the scope of the invention to which the present invention belongs, and the present invention is only defined by the scope of the claims. Like reference numbers designate like elements throughout the specification.

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

1 is a perspective view showing a dust collecting unit of an electric precipitator according to an embodiment of the present invention, FIG. 2 is a plan view of FIG. 1, and FIG. 3 is a perspective view showing a dust collecting unit according to another embodiment of the present invention.

The electric precipitator according to the present invention may be composed of a charging unit (not shown) for charging particles and a dust collecting unit 100 for collecting charged particles at the rear of the charging unit with the power of an electric field.

The charging unit generates ions having + polarity or - polarity in the air by corona discharge, etc., and charges fine particles in the air to have a specific polarity by the generated ions. In the present invention, since the charging unit may use a known configuration, a detailed description of the charging unit will be omitted.

The dust collecting unit 100 is disposed behind the charging unit to collect particles charged by the charging unit on the dust collecting plate with the power of an electric field.

The dust collecting plates 110a and 110b constituting the dust collecting unit 100 may be divided into a first plate 110a and a second plate 110b. A high voltage may be applied to the first plate 110a in a plate shape, and a voltage of opposite polarity to the high voltage may be applied to the second plate 110b or may be grounded. In the following description, it will be described that the second plate 110b is grounded.

At this time, the first plate 110a and the second plate 110b are spaced apart from each other, and charged particles can be moved and collected by the force of an electric field generated by a potential difference between the two plates. For example, when a high-polarity voltage is applied to the first plate 110a and ions of the polarity are generated at the charging part, particles charged with the polarity may be collected on the second plate 110b.

A plurality of first plates 110a and a plurality of second plates 110b are provided and spaced apart from each other so that the dust collection interval between the two plates 110a and 110b is reduced and the dust collection area is increased to improve dust collection efficiency.

An inertial collision plate 111 protruding in a direction orthogonal to one edge of the air flow direction is formed on either one of the first plate 110a or the second plate 110b. When air flows toward the dust collecting unit 100, the inertial collision plate 111 collides with particles of relatively large particle size to block their inflow into the dust collecting unit 100, and allows only relatively small particles to flow into the dust collecting unit 100 through gaps between neighboring inertial collision plates 111.

Therefore, by minimizing the inflow of particles having a large particle size into the dust collecting unit 100, the dust collection efficiency can be increased by allowing the dust collection plates 110a and 110b to collect relatively small particles, and it is possible to minimize a problem in which the durability of the dust collecting plates 110a and 110b is deteriorated due to the generation of sparks by the collected particles.

At this time, the inertial collision plate 111 may be formed on the first plate 110a or the second plate 110b, and is preferably formed on the second plate 110b grounded. This is because sparks may be generated at the edge of the inertial collision plate 111 when a high voltage is applied.

As shown, the inertial collision plate 111 may protrude from the second plate 110b to both left and right sides. Air may be introduced into the dust collecting unit 100 through gaps between neighboring inertial collision plates 111. Depending on the size of the gap between the neighboring inertial collision plates 111, the size of the particles flowing into the dust collecting unit 100 can also be adjusted to some extent.

At this time, as shown in FIG. 2, the distance L1 between the inertial collision plate 111 and the first plate 110a is larger than the distance L2 between the neighboring first plate 110a and the second plate 110b. This is because when the distance between the inertial collision plate 111 and the first plate 110a to which the high voltage is applied is close, sparks may easily occur due to electrical instability.

As shown in FIG. 3 , a slit 1111 may be formed in the inertial collision plate 111 . At this time, the width of the slit 1111 may be formed to be equal to or smaller than the gap between the adjacent inertial collision plates 111 . Therefore, it is possible to block the inflow of relatively large-sized particles through the slit 1111, but to allow air to flow into the dust collector 100, thereby reducing pressure loss.

At this time, the slits 1111 may be formed in plurality according to the size of the inertial collision plate 111 . In addition, in the drawing, a long slit 1111 in a vertical direction is formed, but a plurality of slits 1111 in a horizontal direction may be formed downward.

In addition, the electric precipitator according to the present invention can be used in a large-scale electric precipitator for collecting dust emitted from thermal power plants or large-scale facilities. Accordingly, the dust collecting plates 110a and 110b may be manufactured in a large size with a large dust collecting area. In the following description, the dust collecting plates 110a and 110b used in the present invention and the dust collecting plates 110a and 110b.

4 is a cross -sectional view of a dust collection plate according to an embodiment of the present invention, Figure 5 is a deformation case of FIG. 4, Figure 6 is a manufacturing process of a collecting plate according to an embodiment of the present invention, FIG. 7 is a perspective view of a second plate according to FIG. 6, FIG. 8 is a perspective view of the first plate according to the process of FIG. It is a perspective of the city.

As shown in FIG. 4, the film-type dust collecting plates 110a and 110b according to an embodiment of the present invention may include a film-shaped film portion including an electrically conductive conductive layer 113 and a fixed frame 115 made of a rigid material bonded along an edge of the film portion.

The film unit may include a plastic base film 112 having flexibility, an electrically conductive conductive layer 113 formed on the base film 112, and a coating layer 114 formed of an insulating material on the conductive layer 113. The conductive layer 113 may be formed as a carbon coating on the base film 112 .

5 shows a modified example of FIG. 4, in the case of FIG. 4, the conductive layer 113 and the coating layer 114 are formed on only one side of the base film 112, whereas in the case of FIG. 5, there is a difference in that the conductive layer 113 and the coating layer 114 are formed on both sides of the base film 112.

The coating layer 114 is formed on the upper portion of the conductive layer 113, but a conductive portion 1141 exposing a portion of the conductive layer 113 may be formed. It is preferable that the conductive part 1141 is formed on one edge of the film part so that one edge of the conductive layer 113 is exposed. A fixed frame 115 may be bonded to the edge of the film unit to electrically connect the conductive layer 113 to the outside through the electrically conductive fixed frame 115 . The configuration of electrically connecting the conductive layer 113 to the outside through the fixing frame 115 can be better understood through the description of the manufacturing method of the dust collecting plates 110a and 110b with reference to FIG. 6 .

The manufacturing method of the dust collecting plates 110a and 110b may include preparing a film portion having a film form including an electrically conductive conductive layer 113 (S210 to S230), bonding a fixed frame 115 made of a rigid material along an edge of the film portion (S240), and forming a fixing hole 118 or an insertion hole 119 (S250).

The step of preparing the film unit in the form of a film may correspond to S210 to S230 in FIG. 6 . First, a base film 112 in the form of a film is prepared (S210), and an electrically conductive conductive layer 113 is formed on the base film 112 (S220). The base film 112 may be a plastic film having flexibility. For example, a PET film or a PVC film may be used. At this time, as shown in FIG. 4, the conductive layer 113 may be formed on only one side of the base film 112, or as shown in FIG. 5, the conductive layer 113 may be formed on both sides of the base film 112.

In addition, it is preferable that the conductive layer 113 is slightly smaller than the base film 112 . That is, the edge of the conductive layer 113 is formed inside the edge of the base film 112 so that the edge of the conductive layer 113 is not exposed to the outside. This prevents sparks from occurring when a high voltage is applied to the conductive layer 113 and makes it electrically stable.

In this case, the conductive layer 113 may be formed through carbon coating. Although carbon (C) is non-metal, it has electrical conductivity and is so light that it cannot be compared with metal. And, there is also an advantage of having strong corrosion resistance against corrosive gas. Furthermore, it can be easily manufactured by a method of coating the base film 112, and has the advantage of low manufacturing cost.

Next, a coating layer 114 is formed of an insulating material (eg, plastic) on the conductive layer 113 (S230). The coating layer 114 is formed in the same size as the base film 112, and the conductive layer 113 is formed between the coating layer 114 and the base film 112, but as described above, the edge of the conductive layer 113 It is preferable not to expose to the outside. The conductive layer 113 formed of the carbon coating may have stronger corrosion resistance by the coating layer 114, although the conductive layer 113 itself has strong corrosion resistance.

In the case of FIG. 5 , conductive layers 113 are formed on both sides of the base film 112 , and coating layers 114 are formed on the conductive layers 113 on both sides.

At this time, as illustrated, the coating layer 114 is formed to form a conductive portion 1141 exposing a portion of the conductive layer 113. The conductive part 1141 may be positioned at one side of an edge of the conductive layer 113 on which the fixing frame 115 is formed. A portion of the conductive layer 113 is exposed by the conductive portion 1141 , which is a region where the coating layer 114 is not formed, so that the conductive layer 113 can be electrically connected from the outside.

After preparing the film portion including the electrically conductive conductive layer 113 in this way, a fixed frame 115 made of a hard rigid material is bonded along the edge of the film portion (S240). The fixing frame 115 may be formed through bonding on both sides of the edge of the film unit, but may be formed by mechanical coupling without being limited thereto.

Therefore, in the present invention, the shape of the dust collecting plate 110 can be maintained by the fixing frame 115 made of a rigid material, so that the large dust collecting plates 110a and 110b in the form of a film having a width of 1 m or more can be implemented.

At this time, the fixed frame 115 is bonded to the conductive layer 113 through the conductive part 1141 formed on one side of the edge of the conductive layer 113, and the conductive layer 113 can be electrically connected from the outside through the fixed frame 115. That is, the fixed frame 115 is formed of an electrically conductive material, and a high voltage is applied or grounded to the fixed frame 115 to apply a high voltage to the first plate 110a or the second plate 110b. Or grounded.

Here, the aforementioned inertial collision plate 111 may be formed on one side of the fixed frame 115 . For reference, FIG. 6 illustrates a manufacturing process of the second plate 110b among the above-described dust collecting plates 110a and 110b.

Next, a fixing hole 118 or an insertion hole 119 is formed (S250). The fixing hole 118 is a hole into which the fixing rod 120 is inserted to come into contact with the dust collecting plates 110a and 110b and fix the dust collecting plates 110a and 110b, and the insertion hole 119 is a hole in which the fixing rod 120 is inserted at a distance and the fixing rod 120 passes through. This will be described later with reference to FIG. 9 .

In FIG. 6 , a fixing hole 118b for fixing the second plate 110b may be formed in the fixing frame 115 .

FIG. 8 shows the first plate 110a fabricated according to the process of FIG. 6 . The inertial collision plate 111 is not formed in the fixed frame 115 of the first plate 110a, and the fixed hole 118a having a smaller diameter is formed at a position corresponding to the insertion hole 119b of the second plate 110a. There is a difference in that it is formed, and the basic manufacturing process is the same as described with reference to FIG.

Fixing rods 120a and 120b may be formed to separate and fix the first plate 110a and the second plate 110b manufactured as described above.

The first fixing rod 120a fixes the plurality of first plates 110a apart from each other and applies a high voltage to the first plates 110a. In addition, the second fixing rod 120b fixes the plurality of second plates 110b spaced apart from each other and grounds the second plates 110b. The structure for fixing the plurality of first plates 110a on the first fixing rod 120a and the structure for fixing the plurality of second plates 110b on the second fixing rod 120b are the same.

As shown in FIG. 8 , a fixing hole 118a into which the first fixing rod 120a is inserted is formed in the first plate 110a. When the first fixing rod 120a is inserted into the fixing hole 118a, the inner surface of the fixing hole 118a and the outer surface of the first fixing rod 120a contact each other so that the high voltage applied to the first fixing rod 120a can be transmitted to the first plate 110a. In this case, an insertion hole 119b through which the first fixing rod 120a is spaced apart may be formed in the second plate 110b so that the first fixing rod 120a may pass through the second plate 110b. Accordingly, the first fixing rod 120a may fix the first plate 110a without contacting the second plate 110b.

In addition, a space keeping unit 128 inserted outside the first fixing rod 120a to maintain a constant distance between neighboring first plates 110a may be disposed. Both ends of the gap maintaining part 128 may contact the first plate 110a to maintain a constant distance between adjacent first plates 110a. At this time, it is preferable that the gap maintaining part 128 is formed of an insulator.

A plurality of first fixing rods 120a fixing the first plate 110a (two in the drawing) may be disposed. For reference, six second fixing rods 120b for fixing the second plate 110b are disposed on both sides of the top, bottom, left and right sides.

In addition, the second fixing rod 120b may fix the second plate 110b in the same way as the first fixing rod 120a and ground the second plate 110b through the second fixing rod 120b. The second fixing rod 120b is inserted into the fixing hole 118b formed in the fixing frame 115 of the second plate 110b, and the outer surface of the second fixing rod 120b and the inner surface of the fixing hole 118b come into contact, so that the second plate 110b can be grounded.

Since the first plate 110a has a smaller width and height than the second plate 110b, the second fixing rod 120b penetrating the fixing hole 118b formed in the fixing frame 115 of the second plate 110b is not interfered with the first plate 110a, so there is no need for a separate insertion hole to be formed in the first plate 110a. However, an insertion hole may also be formed in the first plate 110a according to the position of the fixing hole 118b formed in the second plate 120b.

The scope of the present invention is not limited to the above-described embodiments, but may be implemented in various forms of embodiments within the scope of the appended claims. Anyone with ordinary knowledge in the art to which the invention pertains without departing from the subject matter of the invention claimed in the claims is considered to be within the scope of the claims of the present invention to various extents that can be modified.

100: dust collector
110a, 110b: dust collecting plate
110a: first plate
110b: second plate
111: inertial impact plate
1111: slit
112: base film
113: conductive layer
114: coating layer
1141: energized part
115: fixed frame
118: fixed hole
119: insertion hole
120a: first fixed rod
120b: second fixed rod

Claims (9)

A first plate to which a high voltage is applied and a second plate to which a voltage of opposite polarity to the high voltage is applied or grounded are spaced apart from each other so as to be repeated, and the first plate and the second plate are applied between the first plate and the second plate. In an electric precipitator comprising a dust collection unit for collecting charged particles by force of an electric field,
At least one of the first plate or the second plate is formed with an inertial collision plate protruding in a direction orthogonal to one edge of an air flow direction, so that large-sized particles collide with the inertial collision plate to block entry into the dust collecting unit, and small-sized particles flow into the dust collecting unit through gaps between neighboring inertial collision plates and collect dust. According to claim 1,
The inertial collision plate is an electric precipitator that protrudes from one side edge to both sides. According to claim 1,
The inertial collision plate is formed on the second plate,
A distance between the inertial collision plate and the first plate is greater than a distance between the neighboring first plate and the second plate. According to claim 1,
An electrostatic precipitator in which a slit is formed in the inertial collision plate. According to claim 1,
The first plate or the second plate
a film portion in the form of a film including an electrically conductive conductive layer; and
Electrostatic precipitator comprising a fixed frame of a rigid material bonded along the edge of the film unit. According to claim 5,
the film part
base film; and
Electrostatic precipitator comprising a conductive layer formed of a carbon coating on the base film. According to claim 5,
The electrostatic precipitator further comprises a coating layer of an insulating material formed on the film portion of the conductive layer. According to claim 5,
The electric precipitator of claim 1, wherein the fixing frame is formed of a conductive material, and contacts the fixing frame and the conductive layer to conduct electricity with the outside through the fixing frame. According to claim 5,
The inertial collision plate is an electric precipitator formed on the fixed frame.

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