KR101233390B1 - Electrostatic precipitator and its method - Google Patents

Abstract

PURPOSE: A dust collecting apparatus is provided to prevent dust deposition on the surface of a dust collecting electrode by replacing a dust collecting plate with a dust collecting part using a flowing liquid. CONSTITUTION: A dust collecting apparatus comprises a charging part(210), a dust collecting part using a flowing liquid(220), and an opposite part(270). The charging part charges dust in external air which flows into the apparatus. The dust collecting part using a flowing liquid is located next to the charging part in the flow direction of the external air and collects the charged dust with a first flowing liquid. The opposite part faces the dust collecting part using a flowing liquid, is charged to the same polarity as the charged dust, and consists of a second flowing liquid. The second flowing liquid is charged to the same polarity as the charged dust. The dust collecting part using a flowing liquid comprises a flow plate(221) and a liquid flowing part(222).

Description

Electrostatic precipitator and its method

The present invention relates to an electrostatic precipitator, and more particularly, to an electrostatic precipitator for collecting dust directly into a liquid.

Electrostatic precipitator is a device that purifies the gas by applying an electric field to the microparticles contained in the gas such as air to collect electricity by collecting the charged microparticles with an electrostatic force.

Among the electrostatic precipitating methods, the wet electrostatic precipitating method is a method of removing contaminants collected on the dust collecting plate by additionally configuring a washing water supply device and a circulation device.

The dust collector continuous cleaning apparatus (public number 10-2010-0065693) of the conventional wet electrostatic precipitator is fixedly installed on the discharge electrode space keeping bar, and a plurality of discharge electrodes to which a high voltage is applied, and a predetermined distance is spaced between the discharge electrodes. A dust collecting electrode having a special treatment to reduce the critical surface tension on the surface, a reinforcing rod installed between the dust collecting electrodes to maintain the gap between the dust collecting electrodes, and a washing water radially on the surface of the dust collecting electrode. A washing pipe header unit having a unit injection device for spraying, and a water gutter installed under the dust collecting pole to prevent the washing water from flowing to the discharge electrode gap maintaining rod to which a high voltage is applied; By continuously forming a stable water film with the amount of washing water, it is possible to fundamentally block the deposition of the sticky particles, Due discloses a dust collecting polar continuous cleaning device which ultimately can maintain high efficiency of the wet electrostatic precipitator by minimizing the intermittent cleaning conducted after the blocking the high-voltage power supply.

1 is a schematic view showing a hybrid wet scrubber system including a conventional dust collector continuous cleaning device.

Referring to FIG. 1, the hybrid wet scrubber system including the conventional dust collector continuous cleaning device is provided with the dust collector continuous cleaning device of the present invention having the discharge electrode 140 and the dust collector 150, and the cleaning liquid circulation pump 110. ), A high voltage power supply device 120, and a blower 130 for supplying insulated air.

In the conventional wet electrostatic precipitator or the wet ionizer device, the dust collector continuous cleaning apparatus is provided with a plurality of discharge electrodes 140 to which a high voltage is applied, and a dust collector 150 installed at a predetermined distance from the discharge electrodes 140. And a reinforcing rod (not shown) for maintaining a gap between the dust collecting poles 150 and a cleaning pipe header provided with a unit injection device 170 for radially spraying washing water on the surface of the dust collecting pole 150. The unit 160 and the water collecting groove 180 is installed below the dust collecting pole.

The discharge electrode 140 is fixedly installed on the discharge electrode interval maintaining bar (not shown) and a plurality of discharge electrodes are installed at a predetermined interval, and the dust collecting electrode 150 is installed at a predetermined distance between the discharge electrodes.

The dust collecting pole 150 is characterized in that a special treatment is made to reduce the critical surface tension on the surface.

The washing pipe header unit 160 includes a pipe header to which washing water is supplied, and a unit injection device having a washing water discharge hole formed integrally with the pipe header to discharge washing water to the surfaces of the dust collecting electrodes 150. 170).

A through hole is formed in the pipe header provided with the unit injection device 170 so as to communicate with the unit injection device 170. The unit injection device 170 has a hollow inside, so that the washing water is united through the hole. It is introduced into the injection device (170).

The through hole is formed of a hole having a size of 5 ~ 10mm, has a structure capable of supplying a cleaning liquid to the unit injection device 170.

In addition, the lower surface of the unit injection device 170 is formed with a washing water discharge hole, the washing water discharge hole is formed to have a predetermined angle in the vertical direction with the dust collecting electrode (150).

The conventional micro-spray device for collecting fine particles using the electrostatic precipitating method prevents the accumulation of fine particles by flowing the washing water on the surface of the collecting electrode, and the fine particles are collected by the attraction force with the collecting electrode. There is a problem in that the fine particles are not sufficiently prevented from depositing only by flowing water.

In addition, the fine spray device for a fine particle collecting device using a conventional electrostatic precipitating method has a problem that the cleaning of the dust collector is required even if the fine particles are continuously removed through the washing water.

In addition, the conventional fine dusting device for the collecting device using the electrostatic precipitating method has a problem such as a reduction in dust collection efficiency and ozone generation by the fine particles remaining in the collecting electrode.

SUMMARY OF THE INVENTION An object of the present invention is to provide an electrostatic precipitator and a method for preventing dust accumulation by allowing dust to be directly collected in a liquid.

In addition, another object of the present invention is to provide an electrostatic precipitator which is advantageous in product maintenance and preservation without requiring washing of the dust collecting unit separately.

According to an aspect of the present invention, the charging unit for charging the dust contained in the external air flows in the flow direction of the external air next to the charging unit in the flow direction, the flow to collect the charged dust in the flowing first liquid An electrostatic precipitator is provided, including a liquid precipitator.

Here, the fluidized liquid dust collecting unit may be an electrostatic precipitating device comprising a fluidized plate and a liquid flow unit formed of a space occupied by the first liquid flows on the fluidized plate.

The liquid supply passage may further include a water tank configured to store the first liquid flowing in the fluidized liquid dust collector, and between the water tank and the fluidized liquid dust collector, such that the first liquid may move from the water tank to the fluidized liquid dust collector. It may be an electrostatic precipitator characterized in that it comprises.

The apparatus may further include a circulation pump for pumping the first liquid stored in the tank so that the first liquid may move along the liquid supply path.

In addition, the electrostatic precipitator may be located inside the water tank, and further comprising a water tank filter for removing foreign substances contained in the first liquid introduced into the liquid supply path.

In addition, it may be an electrostatic precipitator, which is formed to face the fluidized liquid dust collecting unit, and further includes a counter opposing unit having the same polarity as that of the charged dust.

In addition, the counter portion may be an electrostatic precipitator, characterized in that consisting of a second liquid flows charged with the same polarity of the charged dust.

According to another aspect of the present invention, in the electrostatic precipitator including a charging unit and a liquid-liquid dust collector to collect the dust, in the charging unit, the step of charging the dust contained in the external air introduced and the flow In the liquid dust collecting unit, there is provided an electrostatic precipitating method comprising the step of collecting the charged dust in a flowing first liquid.

The present invention has the effect of solving the problem caused by the accumulation of fine dust on the surface of the dust collecting electrode by replacing the dust collecting plate using the liquid to collect the charged fine dust with electrical attraction.

In addition, by using the liquid dust collecting part instead of the metal dust collecting plate, it is possible to prevent the problem that sparks are generated between the dust collecting plate and the counterpart due to the dust accumulated in a specific area of the dust collecting plate.

In addition, it is possible to prevent the problem of ozone generation due to corrosion problems and corrosion phenomenon of the metal dust collecting plate.

In addition, since the use of the metal plate is not required, it is easy to process the surface of the product, thereby reducing the cost.

In addition, dust is directly collected in the flowing liquid to perform the cleaning of the dust and dust collection at the same time there is an advantageous effect on the maintenance and storage of the product.

1 is a schematic view showing a hybrid wet scrubber system including a conventional dust collector continuous cleaning device.
2 is a view showing a cross section of the electrostatic precipitator according to an embodiment of the present invention.
3 is a view showing a cross section of the electrostatic precipitator according to another embodiment of the present invention.

An embodiment of an electrostatic precipitator according to the present invention will be described in detail with reference to the accompanying drawings. In the following description with reference to the accompanying drawings, the same or corresponding components are given the same reference numerals, and duplicate description thereof will be given. It will be omitted.

In addition, terms such as first and second used below are merely identification symbols for distinguishing the same or corresponding components, and the same or corresponding components are limited by terms such as the first and second components. no.

In addition, the term " coupled " is used not only in the case of direct physical contact between the respective constituent elements in the contact relation between the constituent elements, but also means that other constituent elements are interposed between the constituent elements, Use them as a concept to cover each contact.

2 is a view showing a cross section of the electrostatic precipitator according to an embodiment of the present invention.

Referring to Figure 2, the electrostatic precipitator according to an embodiment of the present invention is located after the charging unit 210 and the charging unit 210 in the flow direction of the external air to charge the dust contained in the external air flows in , The fluid liquid collecting part 220 collecting dust charged in the first liquid flowing, the water tank 230 storing the first liquid flowing in the fluid collecting part 220, the water tank 230, and the fluid collecting part 220 Between), the liquid supply path 250 formed so that the first liquid can move from the water tank 230 to the fluidized liquid dust collecting unit 220, so that the first liquid can be moved along the liquid supply path 250, The circulation pump 240 for pumping the first liquid stored in the 230, located in the water tank 230, the water tank filter 260 for removing the foreign matter contained in the first liquid flowing into the liquid supply path 250 ), And formed to face the fluid collecting dust 250, the polarity of the dust charged by the charging unit 210 It comprises a counter unit 270 charged in the same polarity.

The charging unit 210 charges dust contained in external air introduced into the electrostatic precipitator. Preferably, the charging unit charges the dust by applying a high voltage to the carbon fiber brush (carbon fiber brush) which is a method of generating little ozone.

The fluid liquid collecting part 220 is formed to be positioned after the charging part 210 in the flow direction of the external air, and collects the dust charged by the charging part 210 in the flowing first liquid.

The fluidized liquid dust collector 220 includes a fluidized plate 221 and a liquid flowed portion 222 formed as a space occupied by the first liquid on the fluidized plate 221.

The first liquid is supplied from the water tank 230.

The dust charged by the charging unit 210 moves along the flow direction of the external air, and is then collected by the first liquid flowing on the fluid plate 221 of the fluid collecting unit 220. The following experimental data shows numerically the efficiency with which charged dust collects in a 1st liquid in the ground state in which the voltage is not applied to the 1st liquid when a 1st liquid is water. The following efficiency may vary depending on experimental conditions.

First liquid applied voltage (kV) Polarity of dust Dust collection efficiency (%) 0 minus 4.7 0 plus 3

In order to increase the efficiency of dust collection, a voltage may be applied to the first liquid to have the same polarity or the opposite polarity as that of the dust charged by the charging unit 210.

In order to make the first liquid polarized, a direct voltage may be applied to the first liquid stored in the water tank 230.

The following experimental data shows that when the first liquid is water, the charged dust is collected in the first liquid while the polarity of the first liquid is charged to the same polarity as that of the dust charged by the charging unit 210. The efficiency is shown numerically. The following efficiency may vary depending on experimental conditions.

First liquid applied voltage (kV) Polarity of dust Dust collection efficiency (%) -12 minus 15.6 -10 minus 14.4 -8 minus 16 -6 minus 11.8 -4 minus 11 -2 minus 9.6 2 plus 2.2 4 plus 1.4 6 plus 3 8 plus 5.8 10 plus 6.6 12 plus 8.8

The following experimental data shows that when the first liquid is water, the charged dust is collected in the first liquid while the polarity of the first liquid is charged to the polarity opposite to that of the dust charged by the charging unit 210. The efficiency is shown numerically. The following efficiency may vary depending on experimental conditions.

First liquid applied voltage (kV) Polarity of dust Dust collection efficiency (%) -12 plus 13.2 -10 plus 11.2 -8 plus 10.2 -6 plus 10.2 -4 plus 11.6 -2 plus 9.6 2 minus 11.8 4 minus 16.4 6 minus 21 8 minus 26.8 10 minus 35 12 minus 36.2

The fluid plate 221 serves as a passage for allowing the first liquid to flow on the fluidized liquid dust collector 220. Preferably, the flow plate 221 may be made of a nonconductive material. Since the shape of the liquid flow part 222 may be determined according to the shape of the fluid plate 221, the shape of the fluid plate 221 may determine the overall shape and area of the fluid liquid dust collector 220.

The water tank 230 stores the first liquid flowing on the liquid liquid dust collector 220.

The first liquid stored in the water tank 230 is pumped by the circulation pump 240, and the fluidized liquid dust collector 220 along the liquid supply path 250 formed between the water tank 230 and the fluidized liquid dust collector 220. Are sent to.

The liquid supply passage 250 is a passage through which the first liquid stored in the water tank 230 moves to the fluidized liquid dust collector 220, and may be made of a member having non-conductive and water resistance.

The first liquid which has finished flowing on the liquid liquid dust collecting unit 220 may be introduced back into the water tank 230. The first liquid introduced into the water tank 230 may be pumped by the circulation pump 240 to be supplied to the fluid collecting member 220 through the liquid supply path 250.

A water tank filter 260 may be formed in the water tank 230 to remove dust included in the first liquid flowing into the liquid supply path 250.

Since the first liquid collects the dust charged in the charging unit 210 on the fluid liquid collecting unit 220 and flows into the water tank 230, the first liquid stored in the water tank 230 is supplied to the liquid liquid dust collecting unit 220 again. In order for the dust to be removed, it is necessary. The water filter 260 is formed on the passage of the water tank 230 and the liquid supply path 250 to remove the dust contained in the first liquid, so that the dust contained in the first liquid together with the first liquid flow fluid collection unit Prevent supply to 220.

Electrostatic precipitating apparatus according to the present invention may include an opposing portion 270. The counter part 270 is formed to face the fluidized liquid dust collecting part 220, and a voltage is applied to have the same polarity as that of the dust charged by the charging part 210.

Since the dust charged in the counterpart 270 has the same polarity, electrical repulsive force is generated between the counterpart 270 and the charged dust, and the fluid is a dust collection part in which dust faces the counterpart 270 due to the repulsive force. Since it moves in the direction (220), it is possible to increase the efficiency of collecting dust to the first liquid on the liquid liquid dust collector 220.

Although not shown in Figure 2, the electrostatic precipitator according to an embodiment of the present invention may further include a blowing unit.

The blowing unit may be located outside or inside the electrostatic precipitator so as to generate a smooth air flow for inflow and discharge of external air.

Although not shown in Figure 2, the electrostatic precipitator according to an embodiment of the present invention may further include a carbon filter.

The carbon filter may be formed before the charging unit 210 in the flow direction of the external air to primarily adsorb the dust contained in the external air introduced into the electrostatic precipitator. The carbon filter is made of activated carbon and prevents dust from adsorbing to the fine pores present on the filter.

Referring to the order of air cleaning according to an embodiment of the present invention, the dust contained in the external air is charged by the charging unit 210 while the external air introduced into the electrostatic precipitator moves. The dust charged by the charging unit 210 is collected by the fluid-liquid dust collector 220 in which the first liquid having a polarity opposite to the dust flows, and clean air from which the dust is removed is discharged to the outside of the electrostatic precipitator.

3 is a view showing a cross section of the electrostatic precipitator according to another embodiment of the present invention.

Referring to Figure 3, the electrostatic precipitator according to an embodiment of the present invention is located after the charging unit 310 and the charging unit 310 in the flow direction of the external air to charge the dust contained in the incoming air The first tank 340 and the first tank 340 for storing the first liquid flowing in the liquid liquid dust collecting part 220 and the liquid liquid dust collecting part 320 for collecting dust charged in the first liquid flowing therein Between the liquid collector 320, a first liquid supply path 370 formed so that the first liquid can move from the first tank 340 to the fluid liquid collector 320, and the first liquid is the first liquid supply path ( 370, the first circulation pump 360 for pumping the first liquid stored in the first tank 340, and formed to face the fluid collection unit 320, by the charging unit 310 To the fluid liquid counterpart 330 and the fluid liquid counterpart 330 through which the second liquid charged with the same polarity as that of the charged dust flows. Between the second tank 350, the second tank 350, and the fluid counterpart 330 storing the second fluid flowing therein, a second liquid is disposed in the second tank 350 in the fluid counterpart 330. A second liquid supplying path 390 formed to move to the second) and a second pumping second liquid stored in the second tank 350 so that the second liquid may move along the second liquid supplying path 390. A circulation pump 380 is included.

The charging unit 310 charges dust contained in external air introduced into the electrostatic precipitator. Preferably, the charging unit 310 generates ions to charge dust by applying a high pressure to a carbon fiber brush that does not generate ozone.

The fluid liquid collecting part 320 is formed to be positioned next to the charging part 310 in the flow direction of external air, and to the flowing first liquid charged with a polarity opposite to the polarity of the dust charged by the charging part 310, The dust charged by the charging unit 310 is collected.

The fluid liquid collecting part 320 includes a first fluid flow part 322 formed as a space in which the first liquid flows and occupies on the first fluid plate 321 and the first fluid plate 321.

The first liquid is supplied from the first tank 340.

The dust charged by the charging unit 310 moves along the flow direction of the external air, and is collected by the first liquid flowing on the flow plate 321 of the fluid collection unit 320.

In order to increase the efficiency of dust collection, a voltage may be applied to the first liquid to have the same polarity or the opposite polarity as that of the dust charged by the charging unit 310.

In order to make the first liquid polarized, a direct voltage may be applied to the first liquid stored in the first bath 340.

Preferably, the first liquid stored in the charging unit 310 and the first tank 340 may be connected to a power supply for applying a voltage, which may be a micro pulse charging device.

The first fluid plate 321 serves as a passage for allowing the first liquid to flow on the fluidized liquid dust collector 320. Preferably, the first flow plate 321 may be made of a non-conductive material. Since the shape of the first liquid flow unit 322 may be determined according to the shape of the first flow plate 321, the shape of the first flow plate 321 may determine the overall shape and area of the fluid collection part 320. have.

The first tank 340 stores the first liquid flowing on the liquid liquid dust collector 320.

The first liquid stored in the first tank 340 is pumped by the first circulation pump 360 to form a first liquid supply path 370 formed between the first tank 340 and the fluidized liquid collector 320. It is sent to the fluid collecting dust 320 along.

The first liquid supply path 370 is a passage through which the first liquid stored in the first water tank 340 moves to the fluid collecting member 320, and may be made of a member having non-conductive and water resistance.

The first liquid which has finished flowing on the liquid liquid dust collecting part 320 may be introduced again into the first water tank 340. The first liquid introduced into the first water tank 340 may be pumped by the first circulation pump 360 to be supplied to the fluid liquid collecting part 320 through the first liquid supply path 370.

The liquid liquid counterpart 330 is formed to face the fluid liquid dust collector 320, and on the fluid liquid counterpart 330, a second liquid charged with the same polarity as that of the dust charged by the charging unit 310 is formed. Flow.

The fluid liquid counter part 330 is composed of a second fluid flow part 332 formed as a space occupied by the second liquid flows on the second fluid plate 331 and the second fluid plate 331.

The second liquid is supplied from the second tank 350, and the second liquid stored in the second tank 350 is directly connected to the second liquid to have the same polarity as that of the dust charged by the charging unit 310. Voltage is applied.

Preferably, the second liquid stored in the second tank 350 may be connected to a power supply for applying a voltage, which may be a micro pulse charging device.

Therefore, since the charged second liquid flowing in the fluid counterpart 330 has the same polarity as the dust charged by the charging unit 310, electric repulsive force is generated between the dust and the second liquid, As the dust moves in the direction of the liquid liquid dust collector 320 facing the fluid liquid counterpart 330, the efficiency of collecting dust in the first liquid can be increased.

The second flow plate 331 serves as a passage for allowing the second liquid to flow on the flow liquid counterpart 330. Preferably, the second flow plate 331 may be made of a non-conductive material. Since the shape of the second liquid flow part 322 may be determined according to the shape of the second flow plate 331, the shape of the second flow plate 321 may determine the overall shape and area of the liquid fluid counterpart 330. Can be.

The second tank 350 stores the second liquid flowing on the liquid liquid counterpart 330.

The second liquid stored in the second tank 350 is pumped by the second circulation pump 380, and the second liquid supply path 390 formed between the second tank 350 and the fluid counterpart 330. Is sent to the fluid counterpart 330.

The second liquid supply passage 390 is a passage through which the second liquid stored in the second tank 350 moves to the flow liquid counter portion 330, and may be made of a member having non-conductive and water resistance.

The second liquid, which has finished flowing on the liquid liquid counterpart 330, may be introduced back into the second water tank 350. The second liquid introduced into the second tank 350 may be again pumped by the second circulation pump 380 and supplied to the flow liquid counterpart 330 through the second liquid supply path 390.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit of the invention as set forth in the appended claims. The present invention can be variously modified and changed by those skilled in the art, and it is also within the scope of the present invention.

210: charging unit
220: liquid liquid dust collecting unit
230: Tank
240: circulation pump
250: liquid supply passage
260: Water Filter
270: counterpart
310: electrification
320: fluid liquid dust collecting unit
330: fluid liquid counterpart
340: first tank
350: second tank
360: first circulation pump
370: first liquid supply passage
380: second circulation pump
390: second liquid supply passage

Claims (8)

A charging unit for charging the dust contained in the external air introduced;
A fluid-liquid dust collecting unit which is located after the charging unit in the flow direction of the external air and collects the charged dust in a flowing first liquid; And
It is formed so as to face the fluid collecting dust, and includes a counter oppositely charged with the same polarity of the charged dust
The counterpart,
Electrostatic precipitator, characterized in that consisting of a second liquid flows charged with the same polarity of the charged dust. The method of claim 1,
The liquid liquid dust collecting unit
Fluidized plate; And
A liquid flow unit formed as a space on which the first liquid flows and occupies on the flow plate;
Including
Electrostatic precipitator, characterized in that.
The method of claim 1,
A water tank for storing the first liquid flowing in the liquid liquid dust collecting unit; And
A liquid supply path formed between the water tank and the fluidized liquid dust collecting part so that the first liquid can move from the water tank to the fluidized liquid dust collecting part;
Containing more
Electrostatic precipitator, characterized in that.
The method of claim 3,
A circulation pump for pumping the first liquid stored in the tank so that the first liquid can be moved along the liquid supply path;
Containing more
Electrostatic precipitator, characterized in that.
The method of claim 3,
Located in the tank, the tank filter for removing foreign matter contained in the first liquid flowing into the liquid supply path;
Containing more
Electrostatic precipitator, characterized in that. delete delete delete

Images