JPH02280852A - Electrical dust precipitator - Google Patents

Abstract

PURPOSE:To give properties of not only dust precipitation but also deodorization to an electric dust precipitator by covering both faces of plate electrodes, to which a high DC voltage is applied, with an insulator film, by forming dust precipitation electrodes made of an electrically conductive and deodorizing material into corrugated sheets and by piling up the dust precipitation electrodes on the insulator films one after the other. CONSTITUTION:An inlet port 3 for dust-containing gas is attached to the front end of a main frame body 1, an electrically charging part 3 wherein dust particles are charged and a dust precipitation part 7 constructed of electrodes 9, 10a of different polarities for precipitating charged dust particles by Coulomb force are installed in order in the main frame 1, and an outlet port 8 for purified gas is attached to the rear end of the frame body 1. A high DC voltage is applied to the dust precipitation part 7 and the electrically charging part 3. Both faces of plate electrodes 9 in the dust precipitation part 7 of one polarity are covered with an insulator film 17, dust precipitation electrodes 10a of the other polarity are formed by corrugating a flat plate made of an electrically conductive and deodorizing material, and these dust precipitation electrodes 10a are piled up on the plate electrodes 9 one after the other through insulator films 17. Furthermore, insulation parts 21 of narrow width are formed at both side ends of the electrodes 10a and the dust precipitation part 7 is constituted by building up two or more electrode groups composed of two kinds of electrodes set opposed with each other.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an electrostatic precipitator that collects, deodorizes, and cleans dust in air.

BACKGROUND OF THE INVENTION In recent years, as awareness of health and hygiene has improved, interest in electric dust collectors and deodorizers that effectively collect and deodorize dust and odors in the air, such as cigarette smoke, has increased.

Conventional electric dust collection bags@, for example, are
It has a structure as in the above publication, and has an insulating part on both sides of the high position of the direct current, and the other electrode is formed in the same shape with a spacer provided on the insulating part of the dust collecting electrode, It had a structure in which a plurality of the above-mentioned dust collecting electrodes were alternately stacked.

Problems to be Solved by the Invention However, in such a conventional configuration, the dust collecting electrode is a flat plate, and it is desirable to increase the area of the dust collecting electrode per unit volume of the dust collecting part, that is, to make it more compact. There were difficulties in meeting these demands, and there was also the problem that adding a deodorizing function would conversely increase the volume of the dust collector.

In view of the above-mentioned problems, the first object of the present invention is to have a deodorizing ability as well as a dust collecting ability, and to have a large dust collecting area and a small volume for the entire device. The second purpose is to suppress leakage between electrodes even if the dust collection area is increased in a small volume.

The third purpose is to simplify electrode processing and terminal connection.

Means for Solving the Problems In order to achieve the first object, the first means of the present invention provides an apparatus main body frame, a dust-containing gas inlet provided in the apparatus main body frame, and a dust-containing gas inlet provided in the apparatus main body frame. A charging unit that charges the provided dust particles, a dust collection unit that collects the charged dust particles using Coulomb force and has electrode plates of mutually different polarities, and a clean gas outlet provided in the main body frame are arranged in sequence. A high DC voltage is applied to the dust collecting section and the charging section which have opposite electrodes, and one flat electrode of the dust collecting section is covered with an insulating film on both sides, and the other electrode is covered with an insulating film. The dust electrode is a flat plate having conductivity and deodorizing ability formed into a corrugated shape, and the dust collecting electrode is stacked on the flat plate electrode with the insulating film interposed therebetween, and both ends of the dust collecting electrode are It is formed by having insulating parts spaced apart from each other, and - it is formed by laminating a plurality of the above-mentioned two opposing electrodes.

A second means for achieving the second purpose is to cover both sides of one flat electrode of the dust collection part of the first means with an insulating film, and to separate the dust-containing gas inlet end face and the clean gas outlet end face. The insulating film covering the flat electrode is bonded and insulated over the entire end surface, and the other dust collecting electrode is formed into a flat plate full wave shape having conductivity and deodorizing ability. The structure is formed by stacking a plurality of insulated flat electrodes facing each other.

A third means for achieving the third purpose is to cover both sides of one flat band-shaped electrode of the dust collecting part of the first means with an insulating film, and the other collecting electrode has conductivity and deodorizing ability. A strip-shaped flat plate with a corrugated shape is stacked on the flat strip-shaped electrode so as to face the dust collection electrode via the insulating film, and is wound into a spiral shape to form a false coiled dust collection part. It is something.

Effect: With the configuration of the first means of this configuration, when a DC high voltage is applied from a DC high voltage power source to the wave-shaped dust collecting electrode that also serves as a spacer and the flat electrode, the charged When dust-containing gas and foul-smelling gas flow in, the area of the dust-collecting electrode per unit volume is increased to make it more compact, and the wave-shaped dust-collecting pupil, which has conductivity and deodorizing ability, attracts the dust-containing gas and the foul-smelling gas. As the dust is collected,
Odor components are also deodorized at the same time by the dust collecting electrode.

In addition, according to the configuration of the second means, a flat electrode whose both sides are covered with an insulating film and whose ends through which gas flows in and out are sealed with adhesive and insulation, has a wave-shaped dust collection having conductivity and deodorizing ability. When dust-containing gas and foul-smelling gas flow into the dust collection area formed by stacking electrodes over the entire surface, they are attracted to the wave-shaped dust collection electrode, which has a larger dust collection electrode area per unit volume, and more dust per unit volume is collected. While the dust is collected, odor components are also deodorized at the same time by the dust collection electrode. Further, dust can be collected without causing spark discharge or direct current leakage due to adhesion of dust.

According to the configuration of the third means, a dust collection part is formed by stacking a flat band-shaped electrode whose both sides are covered with an insulating film layer and a band-shaped wave-shaped dust collection electrode having conductivity and deodorizing ability and rolling it into a spiral. Because of this, it has the same dust collection and deodorizing effect as the above-mentioned means, and the connection part between the flat plate band-shaped electrode that connects the DC high voltage power supply and the dust collection electrode is only required at one place, which reduces the installation operation time and reduces the structure. This will be simplified.

EXAMPLE An example of the present invention will be described below with reference to FIGS. 1 to 4. In FIG. 1, a dust-containing gas mass 2 is provided in a frame 1 of the apparatus body, and a charging section 3 is disposed at a subsequent stage within the frame 1 of the apparatus body. The charging section 3 includes a plurality of parallel plate electrodes 4 and a plurality of linear discharge electrodes 6, and a charging DC high voltage generating section 6 that applies a DC high voltage to these two types of electrodes. A dust collecting section 7 having electrode plates of mutually different polarities that collects dust particles charged by the charging section 3 by Coulomb force is provided at the downstream stage of the charging section 3, and a clean gas outlet 8 is provided at the frame of the main body of the device at the downstream stage. It is being In FIGS. 2 and 3 showing the dust collecting section 7, a flat electrode 9 to which a DC high voltage is applied is covered on both sides with an insulating film 17 and is insulated. The dust collection electrode 10a is a flat plate of activated carbon paper impregnated with activity and formed into a wave shape. The dust collecting electrode 10a is stacked facing each other, and as shown in the plan view of FIG. A plurality of the above-mentioned two opposing electrodes are stacked and provided. The wave-shaped dust collection electrode also functions as a spacer to maintain a constant distance between the passages through which the gas passes, and also functions to deodorize odor components passing through. Further, a flat electrode 9 for applying high voltage DC is connected to the positive electrode side of a high voltage DC power source 13 via a high voltage terminal 11 and a high voltage terminal plate 12. The wave-shaped dust collection electrode 10a is connected to the negative electrode side 16 of the DC high voltage power supply 13 via the dust collection electrode terminal 14 and the dust collection electrode terminal plate 16.

In the electrostatic precipitator configured as described above, when dust-containing air containing a bad odor is sent from an external blower (not shown), the dust-containing gas inlet 2 provided in the device main body frame 1 passes through the charging section flows into. Here, corona discharge occurs between the parallel plate electrode 4 and the discharge electrode 6 due to the function of the charging DC high voltage generator e, and the dust is charged. The charged dust is collected in the dust collecting section 7.
sent to. In the dust collecting section 7 (d), an electric field is generated between the flat electrode 9 to which a DC high voltage is applied by the DC high voltage power supply 13 and the wave-shaped dust collecting electrode 10a, and the charged dust is collected by Coulomb force. is collected on the dust collection electrode 10a.At the same time, the wave-shaped dust collection electrode 10a made of activated carbon paper
This removes and deodorizes the odorous acids that pass through. The clean burst air from which dust and odors have been removed is blown out from the clean gas outlet 13 or supplied to a necessary location. In the dust collection section 7,
The flat electrode 9 to which a high DC voltage is applied is covered with an insulating film 17 on both sides, and as shown in FIG. , a dust collection electrode 10a is provided.

Therefore, electrical leakage and spark discharge from the flat electrode 9 to which a DC high voltage is applied to the corrugated dust collection chamber [10a] do not occur because the insulating portions 21 at both ends are provided. Dust collection electrode 10
Since a has a wave shape, a large dust collection area per unit volume can be obtained, and since the dust collection electrode 10a is made of activated carbon paper and has conductivity, it is a flat plate-shaped electrode 9 to which a high DC voltage is applied. An electric field is maintained between the dust collecting chamber 1710a and the wave-shaped dust collecting chamber 1710a, and dust is collected, and odor components are simultaneously removed by the action of activated carbon, thereby eliminating the need to add a new deodorizing unit. Since there is no space, the dust collection chamber tM10& can be made compact, and since the dust collection chamber tM10& has a corrugated shape, it can also serve as a spacer for maintaining the gap through which gas passes, and for each of the above reasons, costs can be reduced.

Next, an embodiment according to the second means of the present invention will be described based on FIGS. The flat electrode 9 to which a DC high voltage is applied is coated with an insulating film 1 on both sides as in the previous embodiment.
At the same time, both ends of the dust-containing gas inlet end face 23 and the clean gas outlet end face 24 are adhesively sealed and sealed with an insulator. A plurality of flat electrodes 9 for applying the DC high voltage and wave-shaped dust collection chambers gi10b made of activated carbon paper impregnated with activated carbon and also serving as spacers are alternately stacked with insulating films interposed therebetween. A flat electrode 9 that applies a DC high voltage is connected to the dust-containing gas inflow end face 2.
3. Since the clean gas outlet end face 24 is also adhesively sealed and covered with an insulating film, the wave-shaped dust collecting electrode 1
Even if 0b is close to the dust-containing gas inlet end face 23 and the clean gas outlet end face 24 and is in contact with the entire curve of the flat electrode 9,
When a DC high voltage is applied, no leakage or spark discharge occurs between the plate-shaped electrode 9 and the wave-shaped dust collecting electrode 10b made of activated carbon paper. Therefore, the area of the dust collection electrode for dust collection and deodorization can be increased, and the electrostatic precipitator can be made more compact.

An embodiment of the present invention according to the third means is shown in FIGS. 7 and 8.
This will be explained based on the diagram. A flat band-shaped electrode 19 to which a DC high voltage is applied is covered on both sides with a band-shaped film 18. This electrode and a dust collection electrode 2o, which is a single sheet of activated carbon paper impregnated with a band-shaped flat plate formed into a wave shape, are stacked facing each other with the band-shaped insulating film 18 interposed therebetween, so as to form a spiral shape. The spiral dust collecting section 22 is formed by rolling it up. The flat strip-shaped electrode 19 is connected to the positive IFfS side of the DC high-voltage power supply 13 via the high-voltage terminal 11, and the strip-shaped and wave-shaped dust collection electrode 2o is connected to the dust collection electrode terminal 14f,
It is connected to the negative electrode side 16 of the DC high voltage power supply 13 via the negative electrode side 16 of the DC high voltage power supply 13.

When the compensation and bad odor charged by the charging unit 3 flow into the spiral dust collection unit 22, the dust collection unit 22 is constructed of a flat band-shaped electrode 19 to which a DC high voltage is applied by a DC high voltage power supply 13 and impregnated with activated carbon. An electric field is generated between the particles and the wave-shaped dust collection plate 20 having a narrow conductivity, and the particles are attracted to the wave-shaped dust collection electrode 20 by Coulomb force and collected, and are deodorized by activated carbon. Flat band-shaped electrode 1 to which DC high voltage is applied
Since both ends of the electrode 9 are covered with a strip-shaped insulating film 18, spark discharge does not occur even if the strip-shaped and wavy dust collecting electrode 20 is in contact with the electrode 9 and energized. The dust collection electrode 2o is made of activated carbon paper and has a corrugated shape so that it can also serve as a spacer, reducing costs and increasing the area for dust collection and deodorization per unit volume, making it possible to make it more compact. Because of the spirally wound shape, manufacturing is easy, and the high-voltage electrode terminal 11 and the dust collection electrode terminal 14 can be connected at one place, respectively, simplifying the structure and reducing costs.

Effects of the Invention As described above, according to the present invention, both sides of the flat electrode for applying DC high voltage in the dust collecting section are covered with insulating films, and the dust collecting electrode is made of a material having conductivity and deodorizing ability. When the dust collecting electrode is stacked on the insulating film on which the flat plate-shaped force is placed, an insulating part is provided at both ends with a certain interval, and a plurality of the picture electrodes are laminated. In the electrostatic precipitator, the area of the dust collecting electrode per unit volume can be large, and deodorization can be performed at the same time at the part of the dust collecting electrode, so that the device can be made more compact.

In addition, both sides of the flat electrode that applies high DC voltage are coated with insulating films, and the insulating films on the dust-containing gas inflow end and clean gas outlet end are bonded and sealed to improve conductivity and deodorizing ability. By alternately stacking a plurality of wave-shaped dust collection electrodes and the flat electrodes, even if the dust collection electrodes are covered with an insulating film that covers the entire width of the flat electrodes, the flat electrodes can be easily removed. There is no discharge or spark discharge between the dust collection electrode and the wave-shaped dust collection electrode, the dust collection area can be increased, and the dust collection area can be made more compact.

Furthermore, a flat band-shaped electrode whose both sides are covered with an insulating film and a dust collection electrode which has electrical conductivity and deodorizing ability and is made into a wave shape by processing the flat band-shaped electrode are stacked and wound into a spiral shape. Therefore, manufacturing is easy, and since the high-voltage mold border terminal connected to the DC high-voltage power supply and the dust collection electrode terminal are each required in one place, the structure is simplified and costs can be reduced.

[Brief explanation of drawings]

FIG. 1 is a longitudinal cross-sectional view of an electrostatic precipitator showing an embodiment of the first means of the present invention, FIG. 2 is a front view of the dust collecting section of the electrostatic precipitator according to the same embodiment, and FIG. FIG. 4 is a partially enlarged view of the electrode of the embodiment; FIG. 4 is a plan view of the flat electrode and wave-shaped dust collection electrode of the embodiment; FIG. 6 is an electric diagram showing an embodiment of the second means of the embodiment. FIG. 6 is an enlarged front view of the dust collecting section of the dust collecting device, and FIG. 6 is a plan view of the stacked flat electrode and wave-shaped dust collecting electrode that constitute the dust collecting section of the same embodiment. FIG. 8 is a front view of the dust collecting section of an electrostatic precipitator showing an embodiment of the third means, and FIG. 8 is a partially enlarged front view of the electrode of the same embodiment. 1... Device main body frame, 2... Dust-containing gas inlet, 3... Charging section, 7... Dust collection section,
8... Clean gas outlet, 9... Flat electrode, 10a, 10b... Wave-shaped dust collection electrode,
13...DC high voltage power supply, 17...Insulating film, 18...Strip-shaped insulating film, 19
......Flat band-shaped electrode, 20... Band-shaped and wave-shaped dust collecting electrode, 21... Insulating parts at both ends,
22... Spiral dust collecting section, 23... Dust-containing gas inlet end face, 24... Clean gas outlet end face.

Claims (3)

[Claims] (1) A device main body frame, a dust-containing gas inlet provided in the device main body frame, a charging unit provided in the device main body frame for charging dust particles, and collecting the charged dust particles using Coulomb force. A dust collecting section having electrode plates of mutually different polarities and a clean gas outlet provided on the main body frame are sequentially arranged, and a high DC voltage is applied to the dust collecting section and the charging section having opposing electrodes. is applied, the dust collection part has one flat electrode covered with an insulating film on both sides, and the other dust collection electrode is a flat plate with conductivity and deodorizing ability formed into a wave shape,
The flat electrode is stacked facing the dust collecting electrode via the insulating film, and both ends of the dust collecting electrode are formed with insulating parts spaced apart from each other, so that the two opposing electrodes An electrostatic precipitator formed by laminating multiple layers. (2) The dust collecting part is made by covering both sides of one flat electrode with an insulating film, and bonding the entire end face of the insulating film covering the flat electrode on the dust-containing gas inlet end face and the clean gas outlet end face. The other dust collection electrode is insulated and sealed.
The electrostatic precipitator according to claim 1, wherein a flat plate having conductivity and deodorizing ability is formed into a wave shape, and a plurality of said dust collecting electrodes and said insulated flat plate electrodes are stacked facing each other. . (3) The dust collection part has one flat band-shaped electrode covered with an insulating film on both sides, and the other dust collection electrode has a wave-shaped band-shaped flat plate with conductivity and deodorizing ability. The electrostatic precipitator according to claim 1, wherein the electrostatic precipitator is stacked facing the dust collecting electrode with the insulating film interposed therebetween and wound into a spiral shape to form a spiral dust collection part.