KR200343968Y1 - apparatus for an electrostatic spray in a dust collector - Google Patents

Abstract

The present invention eliminates the disadvantages of mechanical scrubbers and electrostatic dust collectors, enables the treatment of flammable and explosive dust, enables dust collection at a wide range of temperatures, enables high temperature corrosive gas treatment, and improves dust collection efficiency. It is not only suitable for realizing the electrostatic spray cleaning method that can be maximized, but also provides the electrostatic spray device for the dust collector of simple structure that is easy to maintain.

The electrostatic spraying device for the dust collecting device, in the injection nozzle for the dust collecting device for injecting the liquid droplets 15 to collect the foreign matter particles 25, the liquid droplets to the passage portion of the foreign matter particles 25 in the air charged beforehand. A liquid droplet injection nozzle 11 installed at the center of the nozzle hole for spraying and grounding; A nozzle insulation support block (11a) for supporting the fluid injection nozzle (11) insulated; A high voltage is applied to charge the droplet 15 injected from the droplet injection nozzle 11 to -polarity, the opposite polarity of the foreign matter particles 25, so that the sprayed droplets 15 do not collide with each other. A ring electrode 12 disposed at a distance from the droplet injection nozzle 11; And, it characterized in that it comprises a ring electrode insulating storage block 12a for supporting the ring electrode 12 insulated.

Description

Electrostatic spraying device for dust collector {apparatus for an electrostatic spray in a dust collector}

The present invention relates to an electrostatic spraying device for a dust collector, and more particularly, eliminates the disadvantages of a mechanical cleaning dust collector and the electrostatic dust collector, enables the treatment of flammable and explosive dust, and collects dust at a wide range of temperatures. The present invention relates to an electrostatic spraying device for a dust collecting device having a simple structure, which is suitable for realizing an electrostatic spray washing dust collecting method capable of high temperature, high temperature corrosive gas treatment, and maximizing dust collection efficiency.

In general, an electrostatic precipitator is composed of a discharge electrode and a collecting electrode (counter electrode) to artificially supply voltage to a discharge electrode from a high voltage electrostatic source device, and to charge (ionize) particles by a corona discharge, Particles are collected by an electrical force from a counter electrode having a polar polarity, and a wire electrode is used as a discharge electrode because of its high discharge efficiency, and a positive high voltage (about +12 kV) is applied to the wire electrode. By grounding the counter electrode, a corona discharge is generated between the wire electrode and the counter electrode so that foreign matter particles in the contaminated air are charged (ionized), and thus ionized foreign matter particles are discharged to the counter electrode or downstream. It is collected by the dust collecting electrode separately arranged to supply the purified air. Usually, in order to increase the dust collection efficiency, a cleaning device for automatically cleaning the dust collection electrode, a front end filter, and a scattering preventing end filter are used in the electrostatic precipitator.

In addition, in the conventional cleaning air filtration apparatus, the cleaning liquid is sprayed by a plurality of nozzles in the passage portion of the air in the direction crossing the air, and impurities, which are foreign substances contained in the contaminated air, collide with the particles of the cleaning liquid to be adsorbed to the cleaning liquid to purify it. To be filtered and configured to collect the contaminated cleaning liquid in an eliminator installed at the rear.

In the cleaning dust collection system, the dust collection efficiency improvement for the mechanical cleaning dust collection system, such as a packed-bed cleaning dust collector, has been attempted at research institutes and universities in Korea, and the development of a small dust collection system for a home environment and a narrow indoor space is also attempted. There are about 13 cases including rotary cleaning dust collector and high pressure spray cleaning dust collector, and they are limited to mechanical cleaning dust collector.

In terms of foreign research trends, it is reported at Lurgi Umwelt GmbH and Kaiserslautern University Research Institute in Germany, and it has been reported that it achieved 45% dust collection efficiency based on 0.5㎛, and was installed and tested in Linz steel plant in Austria.

However, in consideration of the environmental problems occurring recently, various problems such as increased indoor residence time and building syndrome are emerging. In order to solve this problem, there is a situation in which an insufficient part as a conventional cleaning device is highlighted. That is, there is a device that can perform an effective cleaning action such as fine dust or gas, but there is a problem in the integrated cleaning action because the scope is somewhat limited. For example, it is difficult to clean submicron particles in a mechanical scrubber, and in the case of an electrostatic precipitator, it appears to be impossible in the cleaning of gaseous contaminants, and it is difficult to treat dust having a large installation area and a large resistivity. In addition, in the cleaning of the filtering method, there is a problem that it is difficult to wet and use, there is a risk of corrosion at high temperatures, and requires a large installation space. In cyclone dust collection, there are problems such as low dust collection efficiency and expensive installation cost due to high pressure drop.

Therefore, the present invention is to solve such a problem, and in particular, to effectively improve the low dust collection performance of the sub-micron particles, which is a disadvantage of the mechanical cleaning dust collector, and to treat not only gaseous pollutants, which is a disadvantage of the electrostatic dust collector, but also flammable explosive dust It is also possible to process dust, dust collection at a wide range of temperatures, high temperature corrosive gas treatment, and in addition to the inertial collision, which is the main particle removal mechanism by the droplets of mechanical scrubber The purpose of the present invention is to provide an electrostatic spraying device for a dust collecting device having a simple structure, which is not only suitable for realizing the electrostatic spray cleaning method that can maximize dust collection efficiency, but also for easy maintenance.

1 is a schematic plan configuration diagram of an embodiment of the apparatus for explaining the electrostatic spray cleaning method to which the electrostatic spray device for dust collector of the present invention is applied as an example;

2 is a longitudinal cross-sectional view of FIG.

3 is a cross-sectional view taken along line 3-3 of FIG. 2;

Figure 4 is an enlarged partial cross-sectional view for explaining the configuration of the electrostatic spray device for dust collector according to the present invention,

5 is an enlarged view for explaining the dust collection state around the sap droplets;

FIG. 6 is a graph of charge characteristics of injection droplets according to nozzle applied voltage and water supply amount according to the electrostatic spray apparatus for dust collector of FIG. 4.

<Description of the symbols for the main parts of the drawings>

10: reaction part (electrostatic spray cleaning dust collecting part) 11: fluid injection nozzle

11a: Nozzle insulation support block 11b: Nozzle socket

11c: ground member 12: ring electrode

12a: ring electrode insulating storage block 12b: high voltage application connecting member

13: Casing 13a: Nozzle assembly tightening block

14: SAP collection unit 15: SAP

20: particle charge portion 21: wire electrode

22: plate electrode 25: foreign matter fine particles

30: suction part 40: particle removing part (Illuminator)

50: heating means 60: sap refining unit

61, 62: water tank 63: filtration means

70: pump means 80: power supply device

In order to achieve the above object, the electrostatic spraying device for the dust collector according to the embodiment of the present invention, in the injection nozzle for the dust collector for collecting the foreign matter particles by injecting the liquid droplets, the passage of foreign matter particles in the air charged in advance A droplet spray nozzle having a nozzle hole for spraying the droplet on the part and grounded at the center; A nozzle insulation support block for supporting the fluid injection nozzle insulated; A ring is installed at a distance from the fluid injection nozzle so that a high voltage is applied to charge the fluid droplets injected from the fluid injection nozzle to a polarity opposite to the foreign matter particles, and the jetted liquid droplets do not collide. electrode; And, it characterized in that it comprises a ring electrode insulating storage block for supporting the ring electrode insulated.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

First, referring to the electrostatic jet cleaning dust collecting apparatus using the electrostatic spraying device for the dust collecting device of the present invention, the electrostatic spray cleaning dust collecting device in Figures 1 to 3, the suction unit 30, the particle charge unit 20, the reaction It may be configured to include a power supply unit 80 including the unit 10, the liquid droplet collection unit 14, the particle removal unit 40, the heating unit 50 and the high voltage generator.

The suction part 30 is installed to introduce air contaminated by suction means such as a blower fan or a blower pump as in the related art, and the particle charge part 20 applies at least a high voltage to charge at least foreign matter particles 25. Is configured to.

The particle charge control unit by the high voltage generating unit includes a plate electrode 22 to be grounded and a wire electrode 21 made of tungsten wire insulated in the center between the plate electrodes 22 and to which a high voltage is applied. The corona discharge creates a charging effect on the microparticle gaseous material passing therebetween. Through the non-conductive material, the discharge phenomenon is configured so as not to occur between the plate electrodes 22, respectively. The thickness of tungsten wire is about 1mm, but the thicker the discharge effect is, the thinner the efficiency becomes. The tighter the tension, the greater the discharge effect is. Therefore, the wire should be adjusted to be thin and almost linear. For this purpose, it is preferable to insert a tunable screw in the part connected to the rod so that the tension can be made more tight.

The reaction unit 10 is surrounded by the casing 13 so that the air reacts with the fluid droplet 15 downward, and at least one electrostatic spray device for a dust collector according to an embodiment of the present invention is installed on the upper portion. do.

Electrostatic spraying device for dust collector according to an embodiment of the present invention, as shown in Figure 4, the liquid injection nozzle (11), nozzle insulating support block (11a), ring electrode 12 and ring electrode insulating storage It comprises a block 12a and, in a preferred embodiment, comprises a metal nozzle socket 11b.

The droplet injection nozzle 11 is provided with a nozzle hole for injecting the droplet in the center of the pre-charged foreign matter particles 25 in the charged air as shown in Figs. It is grounded through, and is insulated and supported by the nozzle insulation support block 11a.

In addition, the ring electrode 12 is interposed with the high voltage application connecting member 12b to charge the droplet 15 injected from the droplet injection nozzle 11 to a polarity opposite to that of the foreign matter particles 25. So that a high voltage is applied and the sprayed droplets 15 are not collided with the liquid droplet injection nozzle 11 at a distance (a protrusion distance d in FIG. 4; a circumferential interval D) in FIG. 4. 11 is housed or supported to be insulated through the ring electrode insulating storage block 12a.

Therefore, the nozzle insulating support block 11a and the ring electrode insulating storage block 12a are made of an insulating material, and the liquid injection nozzle 11 is directly press-fitted into the central through-hole or installation groove of the nozzle insulating support block 11a. Although it may be configured to be fixed, as shown in the drawing to be easily detachable to facilitate the maintenance of the fluid injection nozzle 11 is formed around the fastening portion, the fastening of the fluid injection nozzle 11 It can be installed via the metal nozzle socket (11b) to facilitate the additional disassembly. That is, the nozzle socket 11b is fixed to the nozzle insulation support block 11a by press-fitting or the like, and a fastening portion is formed on the inner circumference of the nozzle socket 11b to fasten the liquid-liquid injection nozzle 11 to be detachably fixed. It is configured to.

In addition, the grounding member 11c and the high voltage application connecting member 12b form through holes in the nozzle insulation support block 11a and the ring electrode insulation storage block 12a in FIG. 4, and the nozzle sockets through the through holes. Although it is comprised so that it may be connected to 11b and the ring electrode 12, it may be provided in direct connection with the liquid droplet injection nozzle 11 and the ring electrode 12, and the high voltage application connection member 12b is the nozzle insulation. It may be inserted between the support block 11a and the ring electrode insulating storage block 12a so as to be pressurized together with the ring electrode 12.

Meanwhile, as shown in FIGS. 1 and 3, the plurality of liquid injection nozzles 11 and ring electrodes (10) are sprayed so that the liquid droplets are cross-sprayed in order to minimize the bypassed area of the air passing through the reaction unit 10. 12) are preferably installed on the casing 13 at an inclination angle β, and are not shown to control the injection pressure or the flow rate of the liquid droplet 15, but the pressure control valve and / or the flow control valve It is preferable to comprise, etc.

In addition, in order to minimize the bypass area of the air in the reaction unit 10 and maximize the reaction, it is preferable to make the liquid droplet injection nozzle 11 a full cone type, and in this case, the liquid droplet More preferably, the spray angle of the spray nozzle 11 is between 50 and 130 degrees (60 degrees and 120 degrees can be selected).

After the reaction in the reaction section 10, as shown in Figure 2 with the fluid collection section 14 constitutes the bottom of the casing 13 so as to collect the dust collection drop 15 falling by the downward injection force and gravity. It is installed inclined at the inclination angle α.

In addition, the particle removal unit 40 for removing the fine water droplets and dust of the air saturated again in the irinate by passing the air discharged after the reaction occurs in the reaction unit 10 in Figures 1 and 2 It is preferably configured to include, and further comprises a heating unit 50 for discharging the purified air after heating to a temperature for proper humidity for proper humidity control of saturated air.

The power supply device 80 includes a high voltage generator such as a power pack for applying the high voltage required to the particle removing unit 40 and the ring electrode 12, and includes a suction unit 30, a heating unit 50, and the like. It is preferable to be configured to supply necessary power, and to be able to adjust a voltage such as a high voltage.

In addition, in FIG. 2, a sap liquid purifying unit 60 for purifying the collected sap liquids 15 flowing along the sap liquid collecting unit 14 is installed in connection with the sap liquid collecting unit 14. The sap droplet refining unit 60 includes water tanks 61 and 62 for discharging the foreign matter particles 25 from the dust collecting sap 15 by flotation and / or sedimentation. The water discharged from the refining unit 60 is not concerned with environmental pollution, and the water filtered by the pump means 70 through the filtration means 63 may be supplied to the liquid injection nozzle 11 so as to be reused. It may be.

According to the configuration according to the embodiment of the present invention described above, it is possible to effectively implement the electrostatic spray cleaning method as follows.

That is, the indoor and outdoor air contaminated in FIGS. 1 and 2 is introduced through the suction part 30 of the first half and flows backward, and the air, in particular, the foreign matter particles 25 are charged to the + polarity in the particle charge part 20. The air including the charged foreign matter particles 25 are introduced into the reaction unit 10.

In the reaction unit 10, referring to FIGS. 4 and 5, the foreign matter fine particles 25 of air passing substantially horizontally across the liquid droplets 15 sprayed downward from the liquid droplet injection nozzles 11. ) Is not only collected in the sap droplets 15 due to inertia collision, diffusion force, thermophoretic force, cohesion force, etc. under the action of flow force and gravity, but also charged in the opposite polarity so that more efficient capture reaction is caused by the attraction force due to electrostatic force. This will happen. In addition, the foreign matter particles 25 are also dropped by gravity, and the above reaction can occur even during the falling process. In addition, since the liquid droplets are cross-sprayed from the plurality of liquid droplet injection nozzles 11 as shown in FIG. 3 with respect to the air passing through the reaction unit 10, the area where the air is bypassed can be reduced to the maximum, and dust collection Efficiency can be increased.

In this way, the air discharged after the reaction in the reaction unit 10 passes through the particle removal unit 40 to remove fine water droplets and dust from the discharged air by illating, and the heating unit While passing through 50, the purified air with controlled humidity is discharged by heating to an appropriate temperature.

In this way, the dust collection efficiency for liquid injection and the dust collection efficiency due to the electrostatic characteristics are combined to create a very precise and comprehensive dust collection efficiency, and almost all dust, water-soluble, and insoluble gas can be effectively collected. It is possible to effectively cope with the purification of complex polluted air.

6 is a graph showing the charge characteristics of the spray droplets according to the nozzle applied voltage and the water supply amount of the electrostatic spray apparatus for the dust collector according to the embodiment of the present invention. The change in the amount of sap droplet charge according to the applied voltage is shown for 2 lpm and 3 lpm main flow rate. The amount of charge of the liquid droplet 15 on the Y axis is expressed by the ratio of the charge amount to the mass of the nozzle current divided by the amount of main water. In FIG. 6, it can be seen that the amount of sap droplet charge increases as the applied voltage increases for all the water volumes. It can be seen that as the ring electrode applied voltage increases further with the results not shown in FIG. 6, the charge-to-mass ratio is shown to be saturated. This is judged to be due to corona discharge occurring on the ring electrode 12. That is, some of the charged sap sprayed from the nozzle while the high voltage is applied to the ring electrode accumulates in the ring electrode by the electrostatic force, and grows into large droplets on the surface of the ring electrode. By forming a cone shape, the tip of the cone eventually causes a corona discharge. This corona discharge reduces the nozzle current and causes neutralization of the charged liquid droplets. On the other hand, it can be seen that the higher the amount of water in the range of main water considered in the experimental example of the present invention, the higher the charge-to-mass ratio for the same applied voltage.

According to the configuration and operation of the electrostatic spray device for the dust collector according to the embodiment of the present invention described above, it is possible to realize an efficient electrostatic spray cleaning dust collection method, effectively reducing the low dust collection performance of the submicron particles, which is a disadvantage of the mechanical cleaning dust collector Improves and enables the treatment of flammable and explosive dust, as well as the treatment of gaseous pollutants, which are disadvantages of electrostatic precipitators, enables dust collection at a wide range of temperatures, and enables high temperature corrosive gas treatment. In addition to the inertial collision, which is the main particle removal mechanism by the liquid droplet of the mechanical scrubber, the electrostatic attraction can be added to maximize the dust collection efficiency even in a compact structure, and the maintenance of nozzles and electrodes is convenient. have.

Claims (4)

In the injection nozzle for the dust collector for spraying the liquid droplet 15 to collect the foreign matter particles 25, A liquid droplet injection nozzle 11 having a nozzle hole for spraying liquid droplets in the passage portion of the foreign matter particles 25 in the charged air in the center and grounded; A nozzle insulation support block (11a) for supporting the fluid injection nozzle (11) insulated; A high voltage is applied to charge the fluid droplet 15 injected from the fluid injection nozzle 11 to a polarity opposite to that of the foreign matter particles 25, and the sprayed fluid droplets 15 do not collide with each other. A ring electrode 12 disposed at a distance from the droplet injection nozzle 11; And, And a ring electrode insulating storage block (12a) for supporting the ring electrode (12) insulated. The method of claim 1, wherein the fastening portion is formed around the translucent injection nozzle 11 so that it can be easily inserted and detached to facilitate maintenance, and the fastening portion of the translucent injection nozzle 11 is easily disassembled. The fastening part is formed, the electrostatic spraying device for a dust collector, characterized in that it comprises a metal nozzle socket (11b) fixedly inserted into the nozzle insulating support block (11a). 2. The ring electrode insulating storage block (1) according to claim 1, wherein the ring electrode (12) is supported between the nozzle insulating support block (11a) and the ring electrode insulating storage block (12a). A fastening portion for fastening the 12a) is formed in each nozzle insulating support block (11a) and the ring electrode insulating storage block (12a). The method of claim 1, wherein the droplet injection nozzle 11 is a full cone type dust collection, characterized in that the spray angle is between 50-130 degrees to minimize the bypass area of the air and maximize the reaction Electrostatic spraying device for the device.